osd_client.c 140.5 KB
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
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#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
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#include <linux/ceph/ceph_features.h>
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#include <linux/ceph/libceph.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
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#include <linux/ceph/striper.h>
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#define OSD_OPREPLY_FRONT_LEN	512
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static struct kmem_cache	*ceph_osd_request_cache;

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static const struct ceph_connection_operations osd_con_ops;
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/*
 * Implement client access to distributed object storage cluster.
 *
 * All data objects are stored within a cluster/cloud of OSDs, or
 * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
 * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
 * remote daemons serving up and coordinating consistent and safe
 * access to storage.
 *
 * Cluster membership and the mapping of data objects onto storage devices
 * are described by the osd map.
 *
 * We keep track of pending OSD requests (read, write), resubmit
 * requests to different OSDs when the cluster topology/data layout
 * change, or retry the affected requests when the communications
 * channel with an OSD is reset.
 */

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static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
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static void link_linger(struct ceph_osd *osd,
			struct ceph_osd_linger_request *lreq);
static void unlink_linger(struct ceph_osd *osd,
			  struct ceph_osd_linger_request *lreq);
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static void clear_backoffs(struct ceph_osd *osd);
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#if 1
static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
{
	bool wrlocked = true;

	if (unlikely(down_read_trylock(sem))) {
		wrlocked = false;
		up_read(sem);
	}

	return wrlocked;
}
static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
{
	WARN_ON(!rwsem_is_locked(&osdc->lock));
}
static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
{
	WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
}
static inline void verify_osd_locked(struct ceph_osd *osd)
{
	struct ceph_osd_client *osdc = osd->o_osdc;

	WARN_ON(!(mutex_is_locked(&osd->lock) &&
		  rwsem_is_locked(&osdc->lock)) &&
		!rwsem_is_wrlocked(&osdc->lock));
}
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static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
{
	WARN_ON(!mutex_is_locked(&lreq->lock));
}
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#else
static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
static inline void verify_osd_locked(struct ceph_osd *osd) { }
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static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
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#endif

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/*
 * calculate the mapping of a file extent onto an object, and fill out the
 * request accordingly.  shorten extent as necessary if it crosses an
 * object boundary.
 *
 * fill osd op in request message.
 */
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static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
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			u64 *objnum, u64 *objoff, u64 *objlen)
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{
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	u64 orig_len = *plen;
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	u32 xlen;
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	/* object extent? */
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	ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
					  objoff, &xlen);
	*objlen = xlen;
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	if (*objlen < orig_len) {
		*plen = *objlen;
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		dout(" skipping last %llu, final file extent %llu~%llu\n",
		     orig_len - *plen, off, *plen);
	}

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	dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
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	return 0;
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}

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static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
{
	memset(osd_data, 0, sizeof (*osd_data));
	osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
}

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static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
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			struct page **pages, u64 length, u32 alignment,
			bool pages_from_pool, bool own_pages)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
	osd_data->pages = pages;
	osd_data->length = length;
	osd_data->alignment = alignment;
	osd_data->pages_from_pool = pages_from_pool;
	osd_data->own_pages = own_pages;
}

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static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
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			struct ceph_pagelist *pagelist)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
	osd_data->pagelist = pagelist;
}

#ifdef CONFIG_BLOCK
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static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
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				   struct ceph_bio_iter *bio_pos,
				   u32 bio_length)
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{
	osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
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	osd_data->bio_pos = *bio_pos;
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	osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */

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static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
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				     struct ceph_bvec_iter *bvec_pos,
				     u32 num_bvecs)
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{
	osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
	osd_data->bvec_pos = *bvec_pos;
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	osd_data->num_bvecs = num_bvecs;
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}

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#define osd_req_op_data(oreq, whch, typ, fld)				\
({									\
	struct ceph_osd_request *__oreq = (oreq);			\
	unsigned int __whch = (whch);					\
	BUG_ON(__whch >= __oreq->r_num_ops);				\
	&__oreq->r_ops[__whch].typ.fld;					\
})
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static struct ceph_osd_data *
osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

	return &osd_req->r_ops[which].raw_data_in;
}

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struct ceph_osd_data *
osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
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			unsigned int which)
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{
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	return osd_req_op_data(osd_req, which, extent, osd_data);
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}
EXPORT_SYMBOL(osd_req_op_extent_osd_data);

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void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages,
			u64 length, u32 alignment,
			bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

	osd_data = osd_req_op_raw_data_in(osd_req, which);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);

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void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
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			unsigned int which, struct page **pages,
			u64 length, u32 alignment,
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			bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);

void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
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			unsigned int which, struct ceph_pagelist *pagelist)
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{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);

#ifdef CONFIG_BLOCK
void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
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				    unsigned int which,
				    struct ceph_bio_iter *bio_pos,
				    u32 bio_length)
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{
	struct ceph_osd_data *osd_data;
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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_bio_init(osd_data, bio_pos, bio_length);
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}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */

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void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req,
				      unsigned int which,
				      struct bio_vec *bvecs, u32 num_bvecs,
				      u32 bytes)
{
	struct ceph_osd_data *osd_data;
	struct ceph_bvec_iter it = {
		.bvecs = bvecs,
		.iter = { .bi_size = bytes },
	};

	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
	ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs);

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void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
					 unsigned int which,
					 struct ceph_bvec_iter *bvec_pos)
{
	struct ceph_osd_data *osd_data;

	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0);
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}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);

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static void osd_req_op_cls_request_info_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, cls, request_info);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
}

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void osd_req_op_cls_request_data_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
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	osd_req->r_ops[which].cls.indata_len += pagelist->length;
	osd_req->r_ops[which].indata_len += pagelist->length;
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}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);

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void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages, u64 length,
			u32 alignment, bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
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	osd_req->r_ops[which].cls.indata_len += length;
	osd_req->r_ops[which].indata_len += length;
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}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);

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void osd_req_op_cls_request_data_bvecs(struct ceph_osd_request *osd_req,
				       unsigned int which,
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				       struct bio_vec *bvecs, u32 num_bvecs,
				       u32 bytes)
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{
	struct ceph_osd_data *osd_data;
	struct ceph_bvec_iter it = {
		.bvecs = bvecs,
		.iter = { .bi_size = bytes },
	};

	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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	ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs);
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	osd_req->r_ops[which].cls.indata_len += bytes;
	osd_req->r_ops[which].indata_len += bytes;
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs);

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void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
			unsigned int which, struct page **pages, u64 length,
			u32 alignment, bool pages_from_pool, bool own_pages)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, cls, response_data);
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	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);

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static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
{
	switch (osd_data->type) {
	case CEPH_OSD_DATA_TYPE_NONE:
		return 0;
	case CEPH_OSD_DATA_TYPE_PAGES:
		return osd_data->length;
	case CEPH_OSD_DATA_TYPE_PAGELIST:
		return (u64)osd_data->pagelist->length;
#ifdef CONFIG_BLOCK
	case CEPH_OSD_DATA_TYPE_BIO:
		return (u64)osd_data->bio_length;
#endif /* CONFIG_BLOCK */
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	case CEPH_OSD_DATA_TYPE_BVECS:
		return osd_data->bvec_pos.iter.bi_size;
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	default:
		WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
		return 0;
	}
}

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static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
{
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	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
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		int num_pages;

		num_pages = calc_pages_for((u64)osd_data->alignment,
						(u64)osd_data->length);
		ceph_release_page_vector(osd_data->pages, num_pages);
	}
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	ceph_osd_data_init(osd_data);
}

static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
			unsigned int which)
{
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
	op = &osd_req->r_ops[which];

	switch (op->op) {
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
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	case CEPH_OSD_OP_WRITEFULL:
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		ceph_osd_data_release(&op->extent.osd_data);
		break;
	case CEPH_OSD_OP_CALL:
		ceph_osd_data_release(&op->cls.request_info);
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		ceph_osd_data_release(&op->cls.request_data);
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		ceph_osd_data_release(&op->cls.response_data);
		break;
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	case CEPH_OSD_OP_SETXATTR:
	case CEPH_OSD_OP_CMPXATTR:
		ceph_osd_data_release(&op->xattr.osd_data);
		break;
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	case CEPH_OSD_OP_STAT:
		ceph_osd_data_release(&op->raw_data_in);
		break;
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	case CEPH_OSD_OP_NOTIFY_ACK:
		ceph_osd_data_release(&op->notify_ack.request_data);
		break;
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	case CEPH_OSD_OP_NOTIFY:
		ceph_osd_data_release(&op->notify.request_data);
		ceph_osd_data_release(&op->notify.response_data);
		break;
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	case CEPH_OSD_OP_LIST_WATCHERS:
		ceph_osd_data_release(&op->list_watchers.response_data);
		break;
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	default:
		break;
	}
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}

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/*
 * Assumes @t is zero-initialized.
 */
static void target_init(struct ceph_osd_request_target *t)
{
	ceph_oid_init(&t->base_oid);
	ceph_oloc_init(&t->base_oloc);
	ceph_oid_init(&t->target_oid);
	ceph_oloc_init(&t->target_oloc);

	ceph_osds_init(&t->acting);
	ceph_osds_init(&t->up);
	t->size = -1;
	t->min_size = -1;

	t->osd = CEPH_HOMELESS_OSD;
}

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static void target_copy(struct ceph_osd_request_target *dest,
			const struct ceph_osd_request_target *src)
{
	ceph_oid_copy(&dest->base_oid, &src->base_oid);
	ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
	ceph_oid_copy(&dest->target_oid, &src->target_oid);
	ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);

	dest->pgid = src->pgid; /* struct */
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	dest->spgid = src->spgid; /* struct */
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	dest->pg_num = src->pg_num;
	dest->pg_num_mask = src->pg_num_mask;
	ceph_osds_copy(&dest->acting, &src->acting);
	ceph_osds_copy(&dest->up, &src->up);
	dest->size = src->size;
	dest->min_size = src->min_size;
	dest->sort_bitwise = src->sort_bitwise;

	dest->flags = src->flags;
	dest->paused = src->paused;

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	dest->epoch = src->epoch;
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	dest->last_force_resend = src->last_force_resend;

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	dest->osd = src->osd;
}

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static void target_destroy(struct ceph_osd_request_target *t)
{
	ceph_oid_destroy(&t->base_oid);
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	ceph_oloc_destroy(&t->base_oloc);
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	ceph_oid_destroy(&t->target_oid);
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	ceph_oloc_destroy(&t->target_oloc);
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}

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/*
 * requests
 */
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static void request_release_checks(struct ceph_osd_request *req)
{
	WARN_ON(!RB_EMPTY_NODE(&req->r_node));
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	WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
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	WARN_ON(!list_empty(&req->r_unsafe_item));
	WARN_ON(req->r_osd);
}

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static void ceph_osdc_release_request(struct kref *kref)
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{
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	struct ceph_osd_request *req = container_of(kref,
					    struct ceph_osd_request, r_kref);
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	unsigned int which;
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	dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
	     req->r_request, req->r_reply);
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	request_release_checks(req);
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	if (req->r_request)
		ceph_msg_put(req->r_request);
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	if (req->r_reply)
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		ceph_msg_put(req->r_reply);
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	for (which = 0; which < req->r_num_ops; which++)
		osd_req_op_data_release(req, which);
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	target_destroy(&req->r_t);
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	ceph_put_snap_context(req->r_snapc);
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	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
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	else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
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		kmem_cache_free(ceph_osd_request_cache, req);
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	else
		kfree(req);
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}
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void ceph_osdc_get_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
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	     kref_read(&req->r_kref));
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	kref_get(&req->r_kref);
}
EXPORT_SYMBOL(ceph_osdc_get_request);

void ceph_osdc_put_request(struct ceph_osd_request *req)
{
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	if (req) {
		dout("%s %p (was %d)\n", __func__, req,
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		     kref_read(&req->r_kref));
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		kref_put(&req->r_kref, ceph_osdc_release_request);
	}
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}
EXPORT_SYMBOL(ceph_osdc_put_request);
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static void request_init(struct ceph_osd_request *req)
{
	/* req only, each op is zeroed in _osd_req_op_init() */
	memset(req, 0, sizeof(*req));

	kref_init(&req->r_kref);
	init_completion(&req->r_completion);
	RB_CLEAR_NODE(&req->r_node);
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	RB_CLEAR_NODE(&req->r_mc_node);
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	INIT_LIST_HEAD(&req->r_unsafe_item);

	target_init(&req->r_t);
}

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/*
 * This is ugly, but it allows us to reuse linger registration and ping
 * requests, keeping the structure of the code around send_linger{_ping}()
 * reasonable.  Setting up a min_nr=2 mempool for each linger request
 * and dealing with copying ops (this blasts req only, watch op remains
 * intact) isn't any better.
 */
static void request_reinit(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	bool mempool = req->r_mempool;
	unsigned int num_ops = req->r_num_ops;
	u64 snapid = req->r_snapid;
	struct ceph_snap_context *snapc = req->r_snapc;
	bool linger = req->r_linger;
	struct ceph_msg *request_msg = req->r_request;
	struct ceph_msg *reply_msg = req->r_reply;

	dout("%s req %p\n", __func__, req);
554
	WARN_ON(kref_read(&req->r_kref) != 1);
555 556
	request_release_checks(req);

557 558
	WARN_ON(kref_read(&request_msg->kref) != 1);
	WARN_ON(kref_read(&reply_msg->kref) != 1);
559 560 561 562 563 564 565 566 567 568 569 570 571
	target_destroy(&req->r_t);

	request_init(req);
	req->r_osdc = osdc;
	req->r_mempool = mempool;
	req->r_num_ops = num_ops;
	req->r_snapid = snapid;
	req->r_snapc = snapc;
	req->r_linger = linger;
	req->r_request = request_msg;
	req->r_reply = reply_msg;
}

572
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
S
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573
					       struct ceph_snap_context *snapc,
574
					       unsigned int num_ops,
575
					       bool use_mempool,
576
					       gfp_t gfp_flags)
S
Sage Weil 已提交
577 578
{
	struct ceph_osd_request *req;
579

S
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580
	if (use_mempool) {
581
		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
582
		req = mempool_alloc(osdc->req_mempool, gfp_flags);
583 584
	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
S
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585
	} else {
586
		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
587
		req = kmalloc(struct_size(req, r_ops, num_ops), gfp_flags);
S
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588
	}
589
	if (unlikely(!req))
590
		return NULL;
S
Sage Weil 已提交
591

592
	request_init(req);
S
Sage Weil 已提交
593 594
	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
595
	req->r_num_ops = num_ops;
596 597
	req->r_snapid = CEPH_NOSNAP;
	req->r_snapc = ceph_get_snap_context(snapc);
598

599 600 601 602
	dout("%s req %p\n", __func__, req);
	return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
603

604
static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
605 606 607 608
{
	return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
}

609 610 611 612 613
int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_msg *msg;
	int msg_size;
S
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614

615
	WARN_ON(ceph_oid_empty(&req->r_base_oid));
616
	WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
617

618
	/* create request message */
619 620 621 622 623 624 625
	msg_size = CEPH_ENCODING_START_BLK_LEN +
			CEPH_PGID_ENCODING_LEN + 1; /* spgid */
	msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			sizeof(struct ceph_osd_reqid); /* reqid */
	msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */
	msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */
626 627
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
628 629
	msg_size += 4 + req->r_base_oid.name_len; /* oid */
	msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
630 631
	msg_size += 8; /* snapid */
	msg_size += 8; /* snap_seq */
632
	msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
633
	msg_size += 4 + 8; /* retry_attempt, features */
634

635
	if (req->r_mempool)
636
		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
S
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637
	else
638 639 640
		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
	if (!msg)
		return -ENOMEM;
641

S
Sage Weil 已提交
642
	memset(msg->front.iov_base, 0, msg->front.iov_len);
643 644
	req->r_request = msg;

645 646
	/* create reply message */
	msg_size = OSD_OPREPLY_FRONT_LEN;
647 648
	msg_size += req->r_base_oid.name_len;
	msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
649 650 651 652 653 654 655 656 657 658 659

	if (req->r_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
	if (!msg)
		return -ENOMEM;

	req->r_reply = msg;

	return 0;
660
}
661
EXPORT_SYMBOL(ceph_osdc_alloc_messages);
662

663
static bool osd_req_opcode_valid(u16 opcode)
664
{
665
	switch (opcode) {
666 667 668
#define GENERATE_CASE(op, opcode, str)	case CEPH_OSD_OP_##op: return true;
__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
#undef GENERATE_CASE
669 670 671 672 673
	default:
		return false;
	}
}

674 675 676 677 678
/*
 * This is an osd op init function for opcodes that have no data or
 * other information associated with them.  It also serves as a
 * common init routine for all the other init functions, below.
 */
679
static struct ceph_osd_req_op *
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680
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
681
		 u16 opcode, u32 flags)
682
{
683 684 685
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
686 687
	BUG_ON(!osd_req_opcode_valid(opcode));

688
	op = &osd_req->r_ops[which];
689 690
	memset(op, 0, sizeof (*op));
	op->op = opcode;
691
	op->flags = flags;
692 693

	return op;
694 695
}

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696
void osd_req_op_init(struct ceph_osd_request *osd_req,
697
		     unsigned int which, u16 opcode, u32 flags)
A
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698
{
699
	(void)_osd_req_op_init(osd_req, which, opcode, flags);
A
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700 701 702
}
EXPORT_SYMBOL(osd_req_op_init);

703 704
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
705 706 707
				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
708 709
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
710 711
	size_t payload_len = 0;

L
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712
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
713 714
	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
715 716 717 718 719

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
720
	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
721 722
		payload_len += length;

723
	op->indata_len = payload_len;
724 725 726
}
EXPORT_SYMBOL(osd_req_op_extent_init);

727 728
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
729
{
730 731 732 733 734 735
	struct ceph_osd_req_op *op;
	u64 previous;

	BUG_ON(which >= osd_req->r_num_ops);
	op = &osd_req->r_ops[which];
	previous = op->extent.length;
736 737 738 739 740 741

	if (length == previous)
		return;		/* Nothing to do */
	BUG_ON(length > previous);

	op->extent.length = length;
742 743
	if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
		op->indata_len -= previous - length;
744 745 746
}
EXPORT_SYMBOL(osd_req_op_extent_update);

747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
				unsigned int which, u64 offset_inc)
{
	struct ceph_osd_req_op *op, *prev_op;

	BUG_ON(which + 1 >= osd_req->r_num_ops);

	prev_op = &osd_req->r_ops[which];
	op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
	/* dup previous one */
	op->indata_len = prev_op->indata_len;
	op->outdata_len = prev_op->outdata_len;
	op->extent = prev_op->extent;
	/* adjust offset */
	op->extent.offset += offset_inc;
	op->extent.length -= offset_inc;

	if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
		op->indata_len -= offset_inc;
}
EXPORT_SYMBOL(osd_req_op_extent_dup_last);

769
int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
770
			const char *class, const char *method)
771
{
772
	struct ceph_osd_req_op *op;
773
	struct ceph_pagelist *pagelist;
774 775 776
	size_t payload_len = 0;
	size_t size;

777
	op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0);
778

779
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
780 781 782
	if (!pagelist)
		return -ENOMEM;

783 784
	ceph_pagelist_init(pagelist);

785 786 787 788
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
789
	ceph_pagelist_append(pagelist, class, size);
790 791 792 793 794 795
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
796
	ceph_pagelist_append(pagelist, method, size);
797 798
	payload_len += size;

799
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
800

801
	op->indata_len = payload_len;
802
	return 0;
803 804
}
EXPORT_SYMBOL(osd_req_op_cls_init);
805

806 807 808 809
int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
			  u16 opcode, const char *name, const void *value,
			  size_t size, u8 cmp_op, u8 cmp_mode)
{
810 811
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
	struct ceph_pagelist *pagelist;
	size_t payload_len;

	BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);

	pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
	if (!pagelist)
		return -ENOMEM;

	ceph_pagelist_init(pagelist);

	payload_len = strlen(name);
	op->xattr.name_len = payload_len;
	ceph_pagelist_append(pagelist, name, payload_len);

	op->xattr.value_len = size;
	ceph_pagelist_append(pagelist, value, size);
	payload_len += size;

	op->xattr.cmp_op = cmp_op;
	op->xattr.cmp_mode = cmp_mode;

	ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
835
	op->indata_len = payload_len;
836 837 838 839
	return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);

840 841 842 843 844
/*
 * @watch_opcode: CEPH_OSD_WATCH_OP_*
 */
static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
				  u64 cookie, u8 watch_opcode)
845
{
846
	struct ceph_osd_req_op *op;
847

848
	op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
849
	op->watch.cookie = cookie;
850 851
	op->watch.op = watch_opcode;
	op->watch.gen = 0;
852 853
}

854 855 856 857 858 859
void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
				unsigned int which,
				u64 expected_object_size,
				u64 expected_write_size)
{
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
860 861
						      CEPH_OSD_OP_SETALLOCHINT,
						      0);
862 863 864 865 866 867 868 869 870 871 872 873 874

	op->alloc_hint.expected_object_size = expected_object_size;
	op->alloc_hint.expected_write_size = expected_write_size;

	/*
	 * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed
	 * not worth a feature bit.  Set FAILOK per-op flag to make
	 * sure older osds don't trip over an unsupported opcode.
	 */
	op->flags |= CEPH_OSD_OP_FLAG_FAILOK;
}
EXPORT_SYMBOL(osd_req_op_alloc_hint_init);

875
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
876 877 878 879 880 881 882
				struct ceph_osd_data *osd_data)
{
	u64 length = ceph_osd_data_length(osd_data);

	if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
		BUG_ON(length > (u64) SIZE_MAX);
		if (length)
883
			ceph_msg_data_add_pages(msg, osd_data->pages,
884 885 886
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
887
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
888 889
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
890
		ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
891
#endif
892 893
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
		ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
894 895 896 897 898
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

899 900
static u32 osd_req_encode_op(struct ceph_osd_op *dst,
			     const struct ceph_osd_req_op *src)
901 902 903 904 905 906 907 908 909 910 911 912
{
	if (WARN_ON(!osd_req_opcode_valid(src->op))) {
		pr_err("unrecognized osd opcode %d\n", src->op);

		return 0;
	}

	switch (src->op) {
	case CEPH_OSD_OP_STAT:
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
913
	case CEPH_OSD_OP_WRITEFULL:
L
Li Wang 已提交
914 915
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_TRUNCATE:
916 917 918 919 920 921 922 923 924 925
		dst->extent.offset = cpu_to_le64(src->extent.offset);
		dst->extent.length = cpu_to_le64(src->extent.length);
		dst->extent.truncate_size =
			cpu_to_le64(src->extent.truncate_size);
		dst->extent.truncate_seq =
			cpu_to_le32(src->extent.truncate_seq);
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
926
		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
927 928 929
		break;
	case CEPH_OSD_OP_WATCH:
		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
930 931 932 933 934
		dst->watch.ver = cpu_to_le64(0);
		dst->watch.op = src->watch.op;
		dst->watch.gen = cpu_to_le32(src->watch.gen);
		break;
	case CEPH_OSD_OP_NOTIFY_ACK:
935
		break;
936 937 938
	case CEPH_OSD_OP_NOTIFY:
		dst->notify.cookie = cpu_to_le64(src->notify.cookie);
		break;
939 940
	case CEPH_OSD_OP_LIST_WATCHERS:
		break;
941 942 943 944 945 946
	case CEPH_OSD_OP_SETALLOCHINT:
		dst->alloc_hint.expected_object_size =
		    cpu_to_le64(src->alloc_hint.expected_object_size);
		dst->alloc_hint.expected_write_size =
		    cpu_to_le64(src->alloc_hint.expected_write_size);
		break;
947 948 949 950 951 952 953
	case CEPH_OSD_OP_SETXATTR:
	case CEPH_OSD_OP_CMPXATTR:
		dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
		dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
		dst->xattr.cmp_op = src->xattr.cmp_op;
		dst->xattr.cmp_mode = src->xattr.cmp_mode;
		break;
954 955 956
	case CEPH_OSD_OP_CREATE:
	case CEPH_OSD_OP_DELETE:
		break;
957
	default:
958
		pr_err("unsupported osd opcode %s\n",
959
			ceph_osd_op_name(src->op));
960
		WARN_ON(1);
961 962

		return 0;
963
	}
964

965
	dst->op = cpu_to_le16(src->op);
966
	dst->flags = cpu_to_le32(src->flags);
967
	dst->payload_len = cpu_to_le32(src->indata_len);
968

969
	return src->indata_len;
970 971
}

972 973 974 975 976 977 978 979 980 981 982
/*
 * build new request AND message, calculate layout, and adjust file
 * extent as needed.
 *
 * if the file was recently truncated, we include information about its
 * old and new size so that the object can be updated appropriately.  (we
 * avoid synchronously deleting truncated objects because it's slow.)
 */
struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
					       struct ceph_file_layout *layout,
					       struct ceph_vino vino,
983 984
					       u64 off, u64 *plen,
					       unsigned int which, int num_ops,
985 986 987 988
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
989
					       bool use_mempool)
990
{
991
	struct ceph_osd_request *req;
992 993 994
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
995
	int r;
996

L
Li Wang 已提交
997
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
998 999
	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
1000

1001
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
1002
					GFP_NOFS);
1003 1004 1005 1006
	if (!req) {
		r = -ENOMEM;
		goto fail;
	}
1007

1008
	/* calculate max write size */
1009
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
1010 1011
	if (r)
		goto fail;
1012

1013
	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
1014
		osd_req_op_init(req, which, opcode, 0);
1015
	} else {
1016
		u32 object_size = layout->object_size;
1017 1018 1019 1020 1021 1022 1023 1024 1025
		u32 object_base = off - objoff;
		if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
			if (truncate_size <= object_base) {
				truncate_size = 0;
			} else {
				truncate_size -= object_base;
				if (truncate_size > object_size)
					truncate_size = object_size;
			}
1026
		}
1027
		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1028 1029
				       truncate_size, truncate_seq);
	}
1030

1031
	req->r_flags = flags;
1032
	req->r_base_oloc.pool = layout->pool_id;
1033
	req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1034
	ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1035

1036 1037 1038 1039
	req->r_snapid = vino.snap;
	if (flags & CEPH_OSD_FLAG_WRITE)
		req->r_data_offset = off;

1040 1041 1042 1043
	r = ceph_osdc_alloc_messages(req, GFP_NOFS);
	if (r)
		goto fail;

S
Sage Weil 已提交
1044
	return req;
1045 1046 1047 1048

fail:
	ceph_osdc_put_request(req);
	return ERR_PTR(r);
S
Sage Weil 已提交
1049
}
1050
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
1051 1052 1053 1054

/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
I
Ilya Dryomov 已提交
1055
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
I
Ilya Dryomov 已提交
1056
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
S
Sage Weil 已提交
1057

1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
/*
 * Call @fn on each OSD request as long as @fn returns 0.
 */
static void for_each_request(struct ceph_osd_client *osdc,
			int (*fn)(struct ceph_osd_request *req, void *arg),
			void *arg)
{
	struct rb_node *n, *p;

	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);

		for (p = rb_first(&osd->o_requests); p; ) {
			struct ceph_osd_request *req =
			    rb_entry(p, struct ceph_osd_request, r_node);

			p = rb_next(p);
			if (fn(req, arg))
				return;
		}
	}

	for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
		struct ceph_osd_request *req =
		    rb_entry(p, struct ceph_osd_request, r_node);

		p = rb_next(p);
		if (fn(req, arg))
			return;
	}
}

1090 1091 1092 1093 1094
static bool osd_homeless(struct ceph_osd *osd)
{
	return osd->o_osd == CEPH_HOMELESS_OSD;
}

1095
static bool osd_registered(struct ceph_osd *osd)
S
Sage Weil 已提交
1096
{
1097
	verify_osdc_locked(osd->o_osdc);
S
Sage Weil 已提交
1098

1099
	return !RB_EMPTY_NODE(&osd->o_node);
S
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1100 1101
}

1102 1103 1104 1105 1106
/*
 * Assumes @osd is zero-initialized.
 */
static void osd_init(struct ceph_osd *osd)
{
1107
	refcount_set(&osd->o_ref, 1);
1108
	RB_CLEAR_NODE(&osd->o_node);
1109
	osd->o_requests = RB_ROOT;
1110
	osd->o_linger_requests = RB_ROOT;
1111 1112
	osd->o_backoff_mappings = RB_ROOT;
	osd->o_backoffs_by_id = RB_ROOT;
1113 1114 1115
	INIT_LIST_HEAD(&osd->o_osd_lru);
	INIT_LIST_HEAD(&osd->o_keepalive_item);
	osd->o_incarnation = 1;
1116
	mutex_init(&osd->lock);
1117 1118 1119 1120 1121
}

static void osd_cleanup(struct ceph_osd *osd)
{
	WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1122
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1123
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1124 1125
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1126 1127 1128 1129 1130 1131 1132 1133 1134
	WARN_ON(!list_empty(&osd->o_osd_lru));
	WARN_ON(!list_empty(&osd->o_keepalive_item));

	if (osd->o_auth.authorizer) {
		WARN_ON(osd_homeless(osd));
		ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
	}
}

S
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1135 1136 1137
/*
 * Track open sessions with osds.
 */
1138
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
1139 1140 1141
{
	struct ceph_osd *osd;

1142 1143
	WARN_ON(onum == CEPH_HOMELESS_OSD);

1144
	osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1145
	osd_init(osd);
S
Sage Weil 已提交
1146
	osd->o_osdc = osdc;
1147
	osd->o_osd = onum;
S
Sage Weil 已提交
1148

1149
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1150

S
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1151 1152 1153 1154 1155
	return osd;
}

static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
1156 1157 1158
	if (refcount_inc_not_zero(&osd->o_ref)) {
		dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1,
		     refcount_read(&osd->o_ref));
S
Sage Weil 已提交
1159 1160 1161 1162 1163 1164 1165 1166 1167
		return osd;
	} else {
		dout("get_osd %p FAIL\n", osd);
		return NULL;
	}
}

static void put_osd(struct ceph_osd *osd)
{
1168 1169 1170
	dout("put_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref),
	     refcount_read(&osd->o_ref) - 1);
	if (refcount_dec_and_test(&osd->o_ref)) {
1171
		osd_cleanup(osd);
S
Sage Weil 已提交
1172
		kfree(osd);
S
Sage Weil 已提交
1173
	}
S
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1174 1175
}

I
Ilya Dryomov 已提交
1176 1177
DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)

1178
static void __move_osd_to_lru(struct ceph_osd *osd)
1179
{
1180 1181 1182
	struct ceph_osd_client *osdc = osd->o_osdc;

	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1183
	BUG_ON(!list_empty(&osd->o_osd_lru));
1184

1185
	spin_lock(&osdc->osd_lru_lock);
1186
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1187 1188
	spin_unlock(&osdc->osd_lru_lock);

1189
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1190 1191
}

1192
static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1193
{
1194
	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1195
	    RB_EMPTY_ROOT(&osd->o_linger_requests))
1196
		__move_osd_to_lru(osd);
1197 1198
}

1199 1200
static void __remove_osd_from_lru(struct ceph_osd *osd)
{
1201 1202 1203 1204 1205
	struct ceph_osd_client *osdc = osd->o_osdc;

	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	spin_lock(&osdc->osd_lru_lock);
1206 1207
	if (!list_empty(&osd->o_osd_lru))
		list_del_init(&osd->o_osd_lru);
1208
	spin_unlock(&osdc->osd_lru_lock);
1209 1210
}

1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
/*
 * Close the connection and assign any leftover requests to the
 * homeless session.
 */
static void close_osd(struct ceph_osd *osd)
{
	struct ceph_osd_client *osdc = osd->o_osdc;
	struct rb_node *n;

	verify_osdc_wrlocked(osdc);
	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	ceph_con_close(&osd->o_con);

	for (n = rb_first(&osd->o_requests); n; ) {
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

		n = rb_next(n); /* unlink_request() */

		dout(" reassigning req %p tid %llu\n", req, req->r_tid);
		unlink_request(osd, req);
		link_request(&osdc->homeless_osd, req);
	}
1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
	for (n = rb_first(&osd->o_linger_requests); n; ) {
		struct ceph_osd_linger_request *lreq =
		    rb_entry(n, struct ceph_osd_linger_request, node);

		n = rb_next(n); /* unlink_linger() */

		dout(" reassigning lreq %p linger_id %llu\n", lreq,
		     lreq->linger_id);
		unlink_linger(osd, lreq);
		link_linger(&osdc->homeless_osd, lreq);
	}
1246
	clear_backoffs(osd);
1247 1248 1249 1250 1251 1252

	__remove_osd_from_lru(osd);
	erase_osd(&osdc->osds, osd);
	put_osd(osd);
}

S
Sage Weil 已提交
1253 1254 1255
/*
 * reset osd connect
 */
1256
static int reopen_osd(struct ceph_osd *osd)
S
Sage Weil 已提交
1257
{
A
Alex Elder 已提交
1258
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1259

1260 1261 1262
	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1263
	    RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1264
		close_osd(osd);
A
Alex Elder 已提交
1265 1266 1267
		return -ENODEV;
	}

1268
	peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
A
Alex Elder 已提交
1269 1270
	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
			!ceph_con_opened(&osd->o_con)) {
1271
		struct rb_node *n;
A
Alex Elder 已提交
1272

1273 1274
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1275
		/* touch each r_stamp for handle_timeout()'s benfit */
1276 1277 1278
		for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
			struct ceph_osd_request *req =
			    rb_entry(n, struct ceph_osd_request, r_node);
1279
			req->r_stamp = jiffies;
1280
		}
A
Alex Elder 已提交
1281 1282

		return -EAGAIN;
S
Sage Weil 已提交
1283
	}
A
Alex Elder 已提交
1284 1285 1286 1287 1288 1289

	ceph_con_close(&osd->o_con);
	ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
	osd->o_incarnation++;

	return 0;
S
Sage Weil 已提交
1290 1291
}

1292 1293
static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
					  bool wrlocked)
S
Sage Weil 已提交
1294
{
1295
	struct ceph_osd *osd;
1296

1297 1298 1299 1300
	if (wrlocked)
		verify_osdc_wrlocked(osdc);
	else
		verify_osdc_locked(osdc);
S
Sage Weil 已提交
1301

1302 1303 1304 1305 1306 1307 1308
	if (o != CEPH_HOMELESS_OSD)
		osd = lookup_osd(&osdc->osds, o);
	else
		osd = &osdc->homeless_osd;
	if (!osd) {
		if (!wrlocked)
			return ERR_PTR(-EAGAIN);
1309

1310 1311 1312 1313
		osd = create_osd(osdc, o);
		insert_osd(&osdc->osds, osd);
		ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
			      &osdc->osdmap->osd_addr[osd->o_osd]);
1314
	}
S
Sage Weil 已提交
1315

1316 1317
	dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
	return osd;
S
Sage Weil 已提交
1318 1319 1320
}

/*
1321 1322 1323
 * Create request <-> OSD session relation.
 *
 * @req has to be assigned a tid, @osd may be homeless.
S
Sage Weil 已提交
1324
 */
1325
static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
S
Sage Weil 已提交
1326
{
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339
	verify_osd_locked(osd);
	WARN_ON(!req->r_tid || req->r_osd);
	dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
	     req, req->r_tid);

	if (!osd_homeless(osd))
		__remove_osd_from_lru(osd);
	else
		atomic_inc(&osd->o_osdc->num_homeless);

	get_osd(osd);
	insert_request(&osd->o_requests, req);
	req->r_osd = osd;
S
Sage Weil 已提交
1340 1341
}

1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358
static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
{
	verify_osd_locked(osd);
	WARN_ON(req->r_osd != osd);
	dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
	     req, req->r_tid);

	req->r_osd = NULL;
	erase_request(&osd->o_requests, req);
	put_osd(osd);

	if (!osd_homeless(osd))
		maybe_move_osd_to_lru(osd);
	else
		atomic_dec(&osd->o_osdc->num_homeless);
}

1359 1360 1361 1362 1363
static bool __pool_full(struct ceph_pg_pool_info *pi)
{
	return pi->flags & CEPH_POOL_FLAG_FULL;
}

I
Ilya Dryomov 已提交
1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378
static bool have_pool_full(struct ceph_osd_client *osdc)
{
	struct rb_node *n;

	for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
		struct ceph_pg_pool_info *pi =
		    rb_entry(n, struct ceph_pg_pool_info, node);

		if (__pool_full(pi))
			return true;
	}

	return false;
}

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
{
	struct ceph_pg_pool_info *pi;

	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
	if (!pi)
		return false;

	return __pool_full(pi);
}

1390 1391 1392 1393
/*
 * Returns whether a request should be blocked from being sent
 * based on the current osdmap and osd_client settings.
 */
1394 1395 1396 1397
static bool target_should_be_paused(struct ceph_osd_client *osdc,
				    const struct ceph_osd_request_target *t,
				    struct ceph_pg_pool_info *pi)
{
1398 1399 1400
	bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
	bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
		       ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1401 1402
		       __pool_full(pi);

1403
	WARN_ON(pi->id != t->target_oloc.pool);
1404 1405 1406
	return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
	       ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
	       (osdc->osdmap->epoch < osdc->epoch_barrier);
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416
}

enum calc_target_result {
	CALC_TARGET_NO_ACTION = 0,
	CALC_TARGET_NEED_RESEND,
	CALC_TARGET_POOL_DNE,
};

static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
					   struct ceph_osd_request_target *t,
1417
					   struct ceph_connection *con,
1418 1419 1420 1421 1422 1423
					   bool any_change)
{
	struct ceph_pg_pool_info *pi;
	struct ceph_pg pgid, last_pgid;
	struct ceph_osds up, acting;
	bool force_resend = false;
1424 1425
	bool unpaused = false;
	bool legacy_change;
1426
	bool split = false;
1427
	bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1428 1429
	bool recovery_deletes = ceph_osdmap_flag(osdc,
						 CEPH_OSDMAP_RECOVERY_DELETES);
1430 1431
	enum calc_target_result ct_res;

1432
	t->epoch = osdc->osdmap->epoch;
1433 1434 1435 1436 1437 1438 1439 1440
	pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
	if (!pi) {
		t->osd = CEPH_HOMELESS_OSD;
		ct_res = CALC_TARGET_POOL_DNE;
		goto out;
	}

	if (osdc->osdmap->epoch == pi->last_force_request_resend) {
1441 1442
		if (t->last_force_resend < pi->last_force_request_resend) {
			t->last_force_resend = pi->last_force_request_resend;
1443
			force_resend = true;
1444
		} else if (t->last_force_resend == 0) {
1445 1446 1447 1448
			force_resend = true;
		}
	}

1449 1450 1451 1452
	/* apply tiering */
	ceph_oid_copy(&t->target_oid, &t->base_oid);
	ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
	if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1453 1454 1455 1456
		if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
			t->target_oloc.pool = pi->read_tier;
		if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
			t->target_oloc.pool = pi->write_tier;
1457 1458 1459 1460 1461 1462 1463

		pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool);
		if (!pi) {
			t->osd = CEPH_HOMELESS_OSD;
			ct_res = CALC_TARGET_POOL_DNE;
			goto out;
		}
1464 1465
	}

1466
	__ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid);
1467 1468 1469
	last_pgid.pool = pgid.pool;
	last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);

1470
	ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483
	if (any_change &&
	    ceph_is_new_interval(&t->acting,
				 &acting,
				 &t->up,
				 &up,
				 t->size,
				 pi->size,
				 t->min_size,
				 pi->min_size,
				 t->pg_num,
				 pi->pg_num,
				 t->sort_bitwise,
				 sort_bitwise,
1484 1485
				 t->recovery_deletes,
				 recovery_deletes,
1486 1487 1488 1489 1490
				 &last_pgid))
		force_resend = true;

	if (t->paused && !target_should_be_paused(osdc, t, pi)) {
		t->paused = false;
1491
		unpaused = true;
1492
	}
1493 1494
	legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
			ceph_osds_changed(&t->acting, &acting, any_change);
1495 1496
	if (t->pg_num)
		split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1497

1498
	if (legacy_change || force_resend || split) {
1499
		t->pgid = pgid; /* struct */
1500
		ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1501 1502 1503 1504 1505 1506 1507
		ceph_osds_copy(&t->acting, &acting);
		ceph_osds_copy(&t->up, &up);
		t->size = pi->size;
		t->min_size = pi->min_size;
		t->pg_num = pi->pg_num;
		t->pg_num_mask = pi->pg_num_mask;
		t->sort_bitwise = sort_bitwise;
1508
		t->recovery_deletes = recovery_deletes;
1509 1510 1511 1512

		t->osd = acting.primary;
	}

1513 1514 1515
	if (unpaused || legacy_change || force_resend ||
	    (split && con && CEPH_HAVE_FEATURE(con->peer_features,
					       RESEND_ON_SPLIT)))
1516 1517 1518 1519
		ct_res = CALC_TARGET_NEED_RESEND;
	else
		ct_res = CALC_TARGET_NO_ACTION;

1520 1521 1522 1523 1524
out:
	dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
	return ct_res;
}

1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846
static struct ceph_spg_mapping *alloc_spg_mapping(void)
{
	struct ceph_spg_mapping *spg;

	spg = kmalloc(sizeof(*spg), GFP_NOIO);
	if (!spg)
		return NULL;

	RB_CLEAR_NODE(&spg->node);
	spg->backoffs = RB_ROOT;
	return spg;
}

static void free_spg_mapping(struct ceph_spg_mapping *spg)
{
	WARN_ON(!RB_EMPTY_NODE(&spg->node));
	WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs));

	kfree(spg);
}

/*
 * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to
 * ceph_pg_mapping.  Used to track OSD backoffs -- a backoff [range] is
 * defined only within a specific spgid; it does not pass anything to
 * children on split, or to another primary.
 */
DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare,
		 RB_BYPTR, const struct ceph_spg *, node)

static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid)
{
	return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits;
}

static void hoid_get_effective_key(const struct ceph_hobject_id *hoid,
				   void **pkey, size_t *pkey_len)
{
	if (hoid->key_len) {
		*pkey = hoid->key;
		*pkey_len = hoid->key_len;
	} else {
		*pkey = hoid->oid;
		*pkey_len = hoid->oid_len;
	}
}

static int compare_names(const void *name1, size_t name1_len,
			 const void *name2, size_t name2_len)
{
	int ret;

	ret = memcmp(name1, name2, min(name1_len, name2_len));
	if (!ret) {
		if (name1_len < name2_len)
			ret = -1;
		else if (name1_len > name2_len)
			ret = 1;
	}
	return ret;
}

static int hoid_compare(const struct ceph_hobject_id *lhs,
			const struct ceph_hobject_id *rhs)
{
	void *effective_key1, *effective_key2;
	size_t effective_key1_len, effective_key2_len;
	int ret;

	if (lhs->is_max < rhs->is_max)
		return -1;
	if (lhs->is_max > rhs->is_max)
		return 1;

	if (lhs->pool < rhs->pool)
		return -1;
	if (lhs->pool > rhs->pool)
		return 1;

	if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs))
		return -1;
	if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs))
		return 1;

	ret = compare_names(lhs->nspace, lhs->nspace_len,
			    rhs->nspace, rhs->nspace_len);
	if (ret)
		return ret;

	hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len);
	hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len);
	ret = compare_names(effective_key1, effective_key1_len,
			    effective_key2, effective_key2_len);
	if (ret)
		return ret;

	ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len);
	if (ret)
		return ret;

	if (lhs->snapid < rhs->snapid)
		return -1;
	if (lhs->snapid > rhs->snapid)
		return 1;

	return 0;
}

/*
 * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX
 * compat stuff here.
 *
 * Assumes @hoid is zero-initialized.
 */
static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid)
{
	u8 struct_v;
	u32 struct_len;
	int ret;

	ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v,
				  &struct_len);
	if (ret)
		return ret;

	if (struct_v < 4) {
		pr_err("got struct_v %d < 4 of hobject_t\n", struct_v);
		goto e_inval;
	}

	hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len,
						GFP_NOIO);
	if (IS_ERR(hoid->key)) {
		ret = PTR_ERR(hoid->key);
		hoid->key = NULL;
		return ret;
	}

	hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len,
						GFP_NOIO);
	if (IS_ERR(hoid->oid)) {
		ret = PTR_ERR(hoid->oid);
		hoid->oid = NULL;
		return ret;
	}

	ceph_decode_64_safe(p, end, hoid->snapid, e_inval);
	ceph_decode_32_safe(p, end, hoid->hash, e_inval);
	ceph_decode_8_safe(p, end, hoid->is_max, e_inval);

	hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len,
						   GFP_NOIO);
	if (IS_ERR(hoid->nspace)) {
		ret = PTR_ERR(hoid->nspace);
		hoid->nspace = NULL;
		return ret;
	}

	ceph_decode_64_safe(p, end, hoid->pool, e_inval);

	ceph_hoid_build_hash_cache(hoid);
	return 0;

e_inval:
	return -EINVAL;
}

static int hoid_encoding_size(const struct ceph_hobject_id *hoid)
{
	return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */
	       4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len;
}

static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid)
{
	ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid));
	ceph_encode_string(p, end, hoid->key, hoid->key_len);
	ceph_encode_string(p, end, hoid->oid, hoid->oid_len);
	ceph_encode_64(p, hoid->snapid);
	ceph_encode_32(p, hoid->hash);
	ceph_encode_8(p, hoid->is_max);
	ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len);
	ceph_encode_64(p, hoid->pool);
}

static void free_hoid(struct ceph_hobject_id *hoid)
{
	if (hoid) {
		kfree(hoid->key);
		kfree(hoid->oid);
		kfree(hoid->nspace);
		kfree(hoid);
	}
}

static struct ceph_osd_backoff *alloc_backoff(void)
{
	struct ceph_osd_backoff *backoff;

	backoff = kzalloc(sizeof(*backoff), GFP_NOIO);
	if (!backoff)
		return NULL;

	RB_CLEAR_NODE(&backoff->spg_node);
	RB_CLEAR_NODE(&backoff->id_node);
	return backoff;
}

static void free_backoff(struct ceph_osd_backoff *backoff)
{
	WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node));
	WARN_ON(!RB_EMPTY_NODE(&backoff->id_node));

	free_hoid(backoff->begin);
	free_hoid(backoff->end);
	kfree(backoff);
}

/*
 * Within a specific spgid, backoffs are managed by ->begin hoid.
 */
DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare,
			RB_BYVAL, spg_node);

static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root,
					    const struct ceph_hobject_id *hoid)
{
	struct rb_node *n = root->rb_node;

	while (n) {
		struct ceph_osd_backoff *cur =
		    rb_entry(n, struct ceph_osd_backoff, spg_node);
		int cmp;

		cmp = hoid_compare(hoid, cur->begin);
		if (cmp < 0) {
			n = n->rb_left;
		} else if (cmp > 0) {
			if (hoid_compare(hoid, cur->end) < 0)
				return cur;

			n = n->rb_right;
		} else {
			return cur;
		}
	}

	return NULL;
}

/*
 * Each backoff has a unique id within its OSD session.
 */
DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node)

static void clear_backoffs(struct ceph_osd *osd)
{
	while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) {
		struct ceph_spg_mapping *spg =
		    rb_entry(rb_first(&osd->o_backoff_mappings),
			     struct ceph_spg_mapping, node);

		while (!RB_EMPTY_ROOT(&spg->backoffs)) {
			struct ceph_osd_backoff *backoff =
			    rb_entry(rb_first(&spg->backoffs),
				     struct ceph_osd_backoff, spg_node);

			erase_backoff(&spg->backoffs, backoff);
			erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
			free_backoff(backoff);
		}
		erase_spg_mapping(&osd->o_backoff_mappings, spg);
		free_spg_mapping(spg);
	}
}

/*
 * Set up a temporary, non-owning view into @t.
 */
static void hoid_fill_from_target(struct ceph_hobject_id *hoid,
				  const struct ceph_osd_request_target *t)
{
	hoid->key = NULL;
	hoid->key_len = 0;
	hoid->oid = t->target_oid.name;
	hoid->oid_len = t->target_oid.name_len;
	hoid->snapid = CEPH_NOSNAP;
	hoid->hash = t->pgid.seed;
	hoid->is_max = false;
	if (t->target_oloc.pool_ns) {
		hoid->nspace = t->target_oloc.pool_ns->str;
		hoid->nspace_len = t->target_oloc.pool_ns->len;
	} else {
		hoid->nspace = NULL;
		hoid->nspace_len = 0;
	}
	hoid->pool = t->target_oloc.pool;
	ceph_hoid_build_hash_cache(hoid);
}

static bool should_plug_request(struct ceph_osd_request *req)
{
	struct ceph_osd *osd = req->r_osd;
	struct ceph_spg_mapping *spg;
	struct ceph_osd_backoff *backoff;
	struct ceph_hobject_id hoid;

	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid);
	if (!spg)
		return false;

	hoid_fill_from_target(&hoid, &req->r_t);
	backoff = lookup_containing_backoff(&spg->backoffs, &hoid);
	if (!backoff)
		return false;

	dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n",
	     __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool,
	     backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id);
	return true;
}

1847 1848
static void setup_request_data(struct ceph_osd_request *req,
			       struct ceph_msg *msg)
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Sage Weil 已提交
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{
1850 1851 1852 1853 1854
	u32 data_len = 0;
	int i;

	if (!list_empty(&msg->data))
		return;
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1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872
	WARN_ON(msg->data_length);
	for (i = 0; i < req->r_num_ops; i++) {
		struct ceph_osd_req_op *op = &req->r_ops[i];

		switch (op->op) {
		/* request */
		case CEPH_OSD_OP_WRITE:
		case CEPH_OSD_OP_WRITEFULL:
			WARN_ON(op->indata_len != op->extent.length);
			ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
			break;
		case CEPH_OSD_OP_SETXATTR:
		case CEPH_OSD_OP_CMPXATTR:
			WARN_ON(op->indata_len != op->xattr.name_len +
						  op->xattr.value_len);
			ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
			break;
1873 1874 1875 1876
		case CEPH_OSD_OP_NOTIFY_ACK:
			ceph_osdc_msg_data_add(msg,
					       &op->notify_ack.request_data);
			break;
1877 1878 1879 1880 1881 1882 1883 1884 1885 1886

		/* reply */
		case CEPH_OSD_OP_STAT:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->raw_data_in);
			break;
		case CEPH_OSD_OP_READ:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->extent.osd_data);
			break;
1887 1888 1889 1890
		case CEPH_OSD_OP_LIST_WATCHERS:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->list_watchers.response_data);
			break;
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903

		/* both */
		case CEPH_OSD_OP_CALL:
			WARN_ON(op->indata_len != op->cls.class_len +
						  op->cls.method_len +
						  op->cls.indata_len);
			ceph_osdc_msg_data_add(msg, &op->cls.request_info);
			/* optional, can be NONE */
			ceph_osdc_msg_data_add(msg, &op->cls.request_data);
			/* optional, can be NONE */
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->cls.response_data);
			break;
1904 1905 1906 1907 1908 1909
		case CEPH_OSD_OP_NOTIFY:
			ceph_osdc_msg_data_add(msg,
					       &op->notify.request_data);
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->notify.response_data);
			break;
1910 1911 1912 1913
		}

		data_len += op->indata_len;
	}
1914

1915 1916 1917
	WARN_ON(data_len != msg->data_length);
}

1918 1919 1920 1921 1922 1923 1924 1925
static void encode_pgid(void **p, const struct ceph_pg *pgid)
{
	ceph_encode_8(p, 1);
	ceph_encode_64(p, pgid->pool);
	ceph_encode_32(p, pgid->seed);
	ceph_encode_32(p, -1); /* preferred */
}

1926 1927 1928 1929 1930 1931 1932
static void encode_spgid(void **p, const struct ceph_spg *spgid)
{
	ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1);
	encode_pgid(p, &spgid->pgid);
	ceph_encode_8(p, spgid->shard);
}

1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946
static void encode_oloc(void **p, void *end,
			const struct ceph_object_locator *oloc)
{
	ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc));
	ceph_encode_64(p, oloc->pool);
	ceph_encode_32(p, -1); /* preferred */
	ceph_encode_32(p, 0);  /* key len */
	if (oloc->pool_ns)
		ceph_encode_string(p, end, oloc->pool_ns->str,
				   oloc->pool_ns->len);
	else
		ceph_encode_32(p, 0);
}

1947 1948
static void encode_request_partial(struct ceph_osd_request *req,
				   struct ceph_msg *msg)
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
{
	void *p = msg->front.iov_base;
	void *const end = p + msg->front_alloc_len;
	u32 data_len = 0;
	int i;

	if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
		/* snapshots aren't writeable */
		WARN_ON(req->r_snapid != CEPH_NOSNAP);
	} else {
		WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
			req->r_data_offset || req->r_snapc);
	}

	setup_request_data(req, msg);

1965 1966
	encode_spgid(&p, &req->r_t.spgid); /* actual spg */
	ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
1967 1968
	ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
	ceph_encode_32(&p, req->r_flags);
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979

	/* reqid */
	ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid));
	memset(p, 0, sizeof(struct ceph_osd_reqid));
	p += sizeof(struct ceph_osd_reqid);

	/* trace */
	memset(p, 0, sizeof(struct ceph_blkin_trace_info));
	p += sizeof(struct ceph_blkin_trace_info);

	ceph_encode_32(&p, 0); /* client_inc, always 0 */
1980
	ceph_encode_timespec64(p, &req->r_mtime);
1981
	p += sizeof(struct ceph_timespec);
1982

1983 1984 1985
	encode_oloc(&p, end, &req->r_t.target_oloc);
	ceph_encode_string(&p, end, req->r_t.target_oid.name,
			   req->r_t.target_oid.name_len);
S
Sage Weil 已提交
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1987 1988 1989 1990 1991 1992
	/* ops, can imply data */
	ceph_encode_16(&p, req->r_num_ops);
	for (i = 0; i < req->r_num_ops; i++) {
		data_len += osd_req_encode_op(p, &req->r_ops[i]);
		p += sizeof(struct ceph_osd_op);
	}
1993

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
	ceph_encode_64(&p, req->r_snapid); /* snapid */
	if (req->r_snapc) {
		ceph_encode_64(&p, req->r_snapc->seq);
		ceph_encode_32(&p, req->r_snapc->num_snaps);
		for (i = 0; i < req->r_snapc->num_snaps; i++)
			ceph_encode_64(&p, req->r_snapc->snaps[i]);
	} else {
		ceph_encode_64(&p, 0); /* snap_seq */
		ceph_encode_32(&p, 0); /* snaps len */
	}

	ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
2006
	BUG_ON(p > end - 8); /* space for features */
2007

2008 2009
	msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
	/* front_len is finalized in encode_request_finish() */
2010 2011
	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
2012 2013 2014 2015 2016 2017 2018
	msg->hdr.data_len = cpu_to_le32(data_len);
	/*
	 * The header "data_off" is a hint to the receiver allowing it
	 * to align received data into its buffers such that there's no
	 * need to re-copy it before writing it to disk (direct I/O).
	 */
	msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
2019

2020 2021 2022 2023 2024 2025 2026
	dout("%s req %p msg %p oid %s oid_len %d\n", __func__, req, msg,
	     req->r_t.target_oid.name, req->r_t.target_oid.name_len);
}

static void encode_request_finish(struct ceph_msg *msg)
{
	void *p = msg->front.iov_base;
2027
	void *const partial_end = p + msg->front.iov_len;
2028 2029 2030 2031
	void *const end = p + msg->front_alloc_len;

	if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) {
		/* luminous OSD -- encode features and be done */
2032
		p = partial_end;
2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074
		ceph_encode_64(&p, msg->con->peer_features);
	} else {
		struct {
			char spgid[CEPH_ENCODING_START_BLK_LEN +
				   CEPH_PGID_ENCODING_LEN + 1];
			__le32 hash;
			__le32 epoch;
			__le32 flags;
			char reqid[CEPH_ENCODING_START_BLK_LEN +
				   sizeof(struct ceph_osd_reqid)];
			char trace[sizeof(struct ceph_blkin_trace_info)];
			__le32 client_inc;
			struct ceph_timespec mtime;
		} __packed head;
		struct ceph_pg pgid;
		void *oloc, *oid, *tail;
		int oloc_len, oid_len, tail_len;
		int len;

		/*
		 * Pre-luminous OSD -- reencode v8 into v4 using @head
		 * as a temporary buffer.  Encode the raw PG; the rest
		 * is just a matter of moving oloc, oid and tail blobs
		 * around.
		 */
		memcpy(&head, p, sizeof(head));
		p += sizeof(head);

		oloc = p;
		p += CEPH_ENCODING_START_BLK_LEN;
		pgid.pool = ceph_decode_64(&p);
		p += 4 + 4; /* preferred, key len */
		len = ceph_decode_32(&p);
		p += len;   /* nspace */
		oloc_len = p - oloc;

		oid = p;
		len = ceph_decode_32(&p);
		p += len;
		oid_len = p - oid;

		tail = p;
2075
		tail_len = partial_end - p;
2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113

		p = msg->front.iov_base;
		ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc));
		ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch));
		ceph_encode_copy(&p, &head.flags, sizeof(head.flags));
		ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime));

		/* reassert_version */
		memset(p, 0, sizeof(struct ceph_eversion));
		p += sizeof(struct ceph_eversion);

		BUG_ON(p >= oloc);
		memmove(p, oloc, oloc_len);
		p += oloc_len;

		pgid.seed = le32_to_cpu(head.hash);
		encode_pgid(&p, &pgid); /* raw pg */

		BUG_ON(p >= oid);
		memmove(p, oid, oid_len);
		p += oid_len;

		/* tail -- ops, snapid, snapc, retry_attempt */
		BUG_ON(p >= tail);
		memmove(p, tail, tail_len);
		p += tail_len;

		msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
	}

	BUG_ON(p > end);
	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);

	dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg,
	     le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len),
	     le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len),
	     le16_to_cpu(msg->hdr.version));
2114 2115 2116 2117 2118 2119 2120 2121 2122
}

/*
 * @req has to be assigned a tid and registered.
 */
static void send_request(struct ceph_osd_request *req)
{
	struct ceph_osd *osd = req->r_osd;

2123
	verify_osd_locked(osd);
2124 2125
	WARN_ON(osd->o_osd != req->r_t.osd);

2126 2127 2128 2129
	/* backoff? */
	if (should_plug_request(req))
		return;

2130 2131 2132 2133 2134 2135 2136
	/*
	 * We may have a previously queued request message hanging
	 * around.  Cancel it to avoid corrupting the msgr.
	 */
	if (req->r_sent)
		ceph_msg_revoke(req->r_request);

2137 2138 2139 2140 2141 2142
	req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
	if (req->r_attempts)
		req->r_flags |= CEPH_OSD_FLAG_RETRY;
	else
		WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);

2143
	encode_request_partial(req, req->r_request);
2144

2145
	dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2146
	     __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2147
	     req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2148 2149
	     req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
	     req->r_attempts);
2150 2151 2152 2153 2154 2155 2156 2157

	req->r_t.paused = false;
	req->r_stamp = jiffies;
	req->r_attempts++;

	req->r_sent = osd->o_incarnation;
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
	ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
S
Sage Weil 已提交
2158 2159
}

I
Ilya Dryomov 已提交
2160 2161 2162 2163
static void maybe_request_map(struct ceph_osd_client *osdc)
{
	bool continuous = false;

2164
	verify_osdc_locked(osdc);
I
Ilya Dryomov 已提交
2165 2166
	WARN_ON(!osdc->osdmap->epoch);

2167 2168 2169
	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
	    ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
	    ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
I
Ilya Dryomov 已提交
2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180
		dout("%s osdc %p continuous\n", __func__, osdc);
		continuous = true;
	} else {
		dout("%s osdc %p onetime\n", __func__, osdc);
	}

	if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			       osdc->osdmap->epoch + 1, continuous))
		ceph_monc_renew_subs(&osdc->client->monc);
}

2181
static void complete_request(struct ceph_osd_request *req, int err);
I
Ilya Dryomov 已提交
2182 2183
static void send_map_check(struct ceph_osd_request *req);

2184
static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2185
{
2186 2187
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd *osd;
I
Ilya Dryomov 已提交
2188
	enum calc_target_result ct_res;
2189
	int err = 0;
2190 2191
	bool need_send = false;
	bool promoted = false;
2192

I
Ilya Dryomov 已提交
2193
	WARN_ON(req->r_tid);
2194 2195 2196
	dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);

again:
2197
	ct_res = calc_target(osdc, &req->r_t, NULL, false);
I
Ilya Dryomov 已提交
2198 2199 2200
	if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
		goto promote;

2201 2202 2203 2204
	osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
	if (IS_ERR(osd)) {
		WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
		goto promote;
2205 2206
	}

2207 2208 2209 2210
	if (osdc->abort_err) {
		dout("req %p abort_err %d\n", req, osdc->abort_err);
		err = osdc->abort_err;
	} else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
2211 2212 2213 2214 2215 2216
		dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
		     osdc->epoch_barrier);
		req->r_t.paused = true;
		maybe_request_map(osdc);
	} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
2217 2218 2219 2220
		dout("req %p pausewr\n", req);
		req->r_t.paused = true;
		maybe_request_map(osdc);
	} else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2221
		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2222 2223 2224 2225 2226 2227
		dout("req %p pauserd\n", req);
		req->r_t.paused = true;
		maybe_request_map(osdc);
	} else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
		   !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
				     CEPH_OSD_FLAG_FULL_FORCE)) &&
2228
		   (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2229 2230
		    pool_full(osdc, req->r_t.base_oloc.pool))) {
		dout("req %p full/pool_full\n", req);
2231
		if (osdc->abort_on_full) {
2232
			err = -ENOSPC;
2233 2234 2235 2236 2237
		} else {
			pr_warn_ratelimited("FULL or reached pool quota\n");
			req->r_t.paused = true;
			maybe_request_map(osdc);
		}
2238 2239
	} else if (!osd_homeless(osd)) {
		need_send = true;
2240
	} else {
2241
		maybe_request_map(osdc);
2242 2243
	}

2244 2245 2246 2247 2248 2249 2250 2251 2252 2253
	mutex_lock(&osd->lock);
	/*
	 * Assign the tid atomically with send_request() to protect
	 * multiple writes to the same object from racing with each
	 * other, resulting in out of order ops on the OSDs.
	 */
	req->r_tid = atomic64_inc_return(&osdc->last_tid);
	link_request(osd, req);
	if (need_send)
		send_request(req);
2254 2255
	else if (err)
		complete_request(req, err);
2256 2257
	mutex_unlock(&osd->lock);

2258
	if (!err && ct_res == CALC_TARGET_POOL_DNE)
I
Ilya Dryomov 已提交
2259 2260
		send_map_check(req);

2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
	if (promoted)
		downgrade_write(&osdc->lock);
	return;

promote:
	up_read(&osdc->lock);
	down_write(&osdc->lock);
	wrlocked = true;
	promoted = true;
	goto again;
}

static void account_request(struct ceph_osd_request *req)
{
2275
	WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
I
Ilya Dryomov 已提交
2276
	WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2277

I
Ilya Dryomov 已提交
2278
	req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2279
	atomic_inc(&req->r_osdc->num_requests);
2280 2281

	req->r_start_stamp = jiffies;
2282 2283 2284 2285 2286 2287 2288 2289 2290
}

static void submit_request(struct ceph_osd_request *req, bool wrlocked)
{
	ceph_osdc_get_request(req);
	account_request(req);
	__submit_request(req, wrlocked);
}

2291
static void finish_request(struct ceph_osd_request *req)
2292 2293 2294
{
	struct ceph_osd_client *osdc = req->r_osdc;

2295
	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2296 2297
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);

2298 2299
	if (req->r_osd)
		unlink_request(req->r_osd, req);
2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311
	atomic_dec(&osdc->num_requests);

	/*
	 * If an OSD has failed or returned and a request has been sent
	 * twice, it's possible to get a reply and end up here while the
	 * request message is queued for delivery.  We will ignore the
	 * reply, so not a big deal, but better to try and catch it.
	 */
	ceph_msg_revoke(req->r_request);
	ceph_msg_revoke_incoming(req->r_reply);
}

2312 2313
static void __complete_request(struct ceph_osd_request *req)
{
2314 2315 2316 2317
	dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
	     req->r_tid, req->r_callback, req->r_result);

	if (req->r_callback)
2318
		req->r_callback(req);
2319 2320
	complete_all(&req->r_completion);
	ceph_osdc_put_request(req);
2321 2322
}

2323 2324 2325 2326 2327 2328
static void complete_request_workfn(struct work_struct *work)
{
	struct ceph_osd_request *req =
	    container_of(work, struct ceph_osd_request, r_complete_work);

	__complete_request(req);
2329 2330
}

I
Ilya Dryomov 已提交
2331
/*
I
Ilya Dryomov 已提交
2332
 * This is open-coded in handle_reply().
I
Ilya Dryomov 已提交
2333 2334 2335 2336 2337 2338
 */
static void complete_request(struct ceph_osd_request *req, int err)
{
	dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);

	req->r_result = err;
2339
	finish_request(req);
2340 2341 2342

	INIT_WORK(&req->r_complete_work, complete_request_workfn);
	queue_work(req->r_osdc->completion_wq, &req->r_complete_work);
I
Ilya Dryomov 已提交
2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360
}

static void cancel_map_check(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd_request *lookup_req;

	verify_osdc_wrlocked(osdc);

	lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
	if (!lookup_req)
		return;

	WARN_ON(lookup_req != req);
	erase_request_mc(&osdc->map_checks, req);
	ceph_osdc_put_request(req);
}

2361 2362 2363 2364
static void cancel_request(struct ceph_osd_request *req)
{
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);

I
Ilya Dryomov 已提交
2365
	cancel_map_check(req);
2366
	finish_request(req);
I
Ilya Dryomov 已提交
2367
	complete_all(&req->r_completion);
2368
	ceph_osdc_put_request(req);
2369 2370
}

2371 2372 2373 2374 2375 2376 2377 2378
static void abort_request(struct ceph_osd_request *req, int err)
{
	dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);

	cancel_map_check(req);
	complete_request(req, err);
}

2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400
static int abort_fn(struct ceph_osd_request *req, void *arg)
{
	int err = *(int *)arg;

	abort_request(req, err);
	return 0; /* continue iteration */
}

/*
 * Abort all in-flight requests with @err and arrange for all future
 * requests to be failed immediately.
 */
void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
{
	dout("%s osdc %p err %d\n", __func__, osdc, err);
	down_write(&osdc->lock);
	for_each_request(osdc, abort_fn, &err);
	osdc->abort_err = err;
	up_write(&osdc->lock);
}
EXPORT_SYMBOL(ceph_osdc_abort_requests);

2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426
static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
	if (likely(eb > osdc->epoch_barrier)) {
		dout("updating epoch_barrier from %u to %u\n",
				osdc->epoch_barrier, eb);
		osdc->epoch_barrier = eb;
		/* Request map if we're not to the barrier yet */
		if (eb > osdc->osdmap->epoch)
			maybe_request_map(osdc);
	}
}

void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
	down_read(&osdc->lock);
	if (unlikely(eb > osdc->epoch_barrier)) {
		up_read(&osdc->lock);
		down_write(&osdc->lock);
		update_epoch_barrier(osdc, eb);
		up_write(&osdc->lock);
	} else {
		up_read(&osdc->lock);
	}
}
EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier);

2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437
/*
 * We can end up releasing caps as a result of abort_request().
 * In that case, we probably want to ensure that the cap release message
 * has an updated epoch barrier in it, so set the epoch barrier prior to
 * aborting the first request.
 */
static int abort_on_full_fn(struct ceph_osd_request *req, void *arg)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	bool *victims = arg;

2438
	if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
2439
	    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2440
	     pool_full(osdc, req->r_t.base_oloc.pool))) {
2441 2442 2443 2444 2445 2446 2447 2448 2449 2450
		if (!*victims) {
			update_epoch_barrier(osdc, osdc->osdmap->epoch);
			*victims = true;
		}
		abort_request(req, -ENOSPC);
	}

	return 0; /* continue iteration */
}

2451 2452
/*
 * Drop all pending requests that are stalled waiting on a full condition to
2453 2454 2455
 * clear, and complete them with ENOSPC as the return code. Set the
 * osdc->epoch_barrier to the latest map epoch that we've seen if any were
 * cancelled.
2456 2457 2458
 */
static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
{
2459
	bool victims = false;
2460

2461 2462
	if (osdc->abort_on_full &&
	    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc)))
2463
		for_each_request(osdc, abort_on_full_fn, &victims);
2464 2465
}

I
Ilya Dryomov 已提交
2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547
static void check_pool_dne(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osdmap *map = osdc->osdmap;

	verify_osdc_wrlocked(osdc);
	WARN_ON(!map->epoch);

	if (req->r_attempts) {
		/*
		 * We sent a request earlier, which means that
		 * previously the pool existed, and now it does not
		 * (i.e., it was deleted).
		 */
		req->r_map_dne_bound = map->epoch;
		dout("%s req %p tid %llu pool disappeared\n", __func__, req,
		     req->r_tid);
	} else {
		dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
		     req, req->r_tid, req->r_map_dne_bound, map->epoch);
	}

	if (req->r_map_dne_bound) {
		if (map->epoch >= req->r_map_dne_bound) {
			/* we had a new enough map */
			pr_info_ratelimited("tid %llu pool does not exist\n",
					    req->r_tid);
			complete_request(req, -ENOENT);
		}
	} else {
		send_map_check(req);
	}
}

static void map_check_cb(struct ceph_mon_generic_request *greq)
{
	struct ceph_osd_client *osdc = &greq->monc->client->osdc;
	struct ceph_osd_request *req;
	u64 tid = greq->private_data;

	WARN_ON(greq->result || !greq->u.newest);

	down_write(&osdc->lock);
	req = lookup_request_mc(&osdc->map_checks, tid);
	if (!req) {
		dout("%s tid %llu dne\n", __func__, tid);
		goto out_unlock;
	}

	dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
	     req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
	if (!req->r_map_dne_bound)
		req->r_map_dne_bound = greq->u.newest;
	erase_request_mc(&osdc->map_checks, req);
	check_pool_dne(req);

	ceph_osdc_put_request(req);
out_unlock:
	up_write(&osdc->lock);
}

static void send_map_check(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd_request *lookup_req;
	int ret;

	verify_osdc_wrlocked(osdc);

	lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
	if (lookup_req) {
		WARN_ON(lookup_req != req);
		return;
	}

	ceph_osdc_get_request(req);
	insert_request_mc(&osdc->map_checks, req);
	ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
					  map_check_cb, req->r_tid);
	WARN_ON(ret);
}

2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559
/*
 * lingering requests, watch/notify v2 infrastructure
 */
static void linger_release(struct kref *kref)
{
	struct ceph_osd_linger_request *lreq =
	    container_of(kref, struct ceph_osd_linger_request, kref);

	dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
	     lreq->reg_req, lreq->ping_req);
	WARN_ON(!RB_EMPTY_NODE(&lreq->node));
	WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
I
Ilya Dryomov 已提交
2560
	WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2561
	WARN_ON(!list_empty(&lreq->scan_item));
2562
	WARN_ON(!list_empty(&lreq->pending_lworks));
2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598
	WARN_ON(lreq->osd);

	if (lreq->reg_req)
		ceph_osdc_put_request(lreq->reg_req);
	if (lreq->ping_req)
		ceph_osdc_put_request(lreq->ping_req);
	target_destroy(&lreq->t);
	kfree(lreq);
}

static void linger_put(struct ceph_osd_linger_request *lreq)
{
	if (lreq)
		kref_put(&lreq->kref, linger_release);
}

static struct ceph_osd_linger_request *
linger_get(struct ceph_osd_linger_request *lreq)
{
	kref_get(&lreq->kref);
	return lreq;
}

static struct ceph_osd_linger_request *
linger_alloc(struct ceph_osd_client *osdc)
{
	struct ceph_osd_linger_request *lreq;

	lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
	if (!lreq)
		return NULL;

	kref_init(&lreq->kref);
	mutex_init(&lreq->lock);
	RB_CLEAR_NODE(&lreq->node);
	RB_CLEAR_NODE(&lreq->osdc_node);
I
Ilya Dryomov 已提交
2599
	RB_CLEAR_NODE(&lreq->mc_node);
2600
	INIT_LIST_HEAD(&lreq->scan_item);
2601
	INIT_LIST_HEAD(&lreq->pending_lworks);
2602
	init_completion(&lreq->reg_commit_wait);
2603
	init_completion(&lreq->notify_finish_wait);
2604 2605 2606 2607 2608 2609 2610 2611 2612 2613

	lreq->osdc = osdc;
	target_init(&lreq->t);

	dout("%s lreq %p\n", __func__, lreq);
	return lreq;
}

DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
I
Ilya Dryomov 已提交
2614
DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
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/*
 * Create linger request <-> OSD session relation.
 *
 * @lreq has to be registered, @osd may be homeless.
 */
static void link_linger(struct ceph_osd *osd,
			struct ceph_osd_linger_request *lreq)
{
	verify_osd_locked(osd);
	WARN_ON(!lreq->linger_id || lreq->osd);
	dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
	     osd->o_osd, lreq, lreq->linger_id);

	if (!osd_homeless(osd))
		__remove_osd_from_lru(osd);
	else
		atomic_inc(&osd->o_osdc->num_homeless);

	get_osd(osd);
	insert_linger(&osd->o_linger_requests, lreq);
	lreq->osd = osd;
}

static void unlink_linger(struct ceph_osd *osd,
			  struct ceph_osd_linger_request *lreq)
{
	verify_osd_locked(osd);
	WARN_ON(lreq->osd != osd);
	dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
	     osd->o_osd, lreq, lreq->linger_id);

	lreq->osd = NULL;
	erase_linger(&osd->o_linger_requests, lreq);
	put_osd(osd);

	if (!osd_homeless(osd))
		maybe_move_osd_to_lru(osd);
	else
		atomic_dec(&osd->o_osdc->num_homeless);
}

static bool __linger_registered(struct ceph_osd_linger_request *lreq)
{
	verify_osdc_locked(lreq->osdc);

	return !RB_EMPTY_NODE(&lreq->osdc_node);
}

static bool linger_registered(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	bool registered;

	down_read(&osdc->lock);
	registered = __linger_registered(lreq);
	up_read(&osdc->lock);

	return registered;
}

static void linger_register(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;

	verify_osdc_wrlocked(osdc);
	WARN_ON(lreq->linger_id);

	linger_get(lreq);
	lreq->linger_id = ++osdc->last_linger_id;
	insert_linger_osdc(&osdc->linger_requests, lreq);
}

static void linger_unregister(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;

	verify_osdc_wrlocked(osdc);

	erase_linger_osdc(&osdc->linger_requests, lreq);
	linger_put(lreq);
}

static void cancel_linger_request(struct ceph_osd_request *req)
{
	struct ceph_osd_linger_request *lreq = req->r_priv;

	WARN_ON(!req->r_linger);
	cancel_request(req);
	linger_put(lreq);
}

struct linger_work {
	struct work_struct work;
	struct ceph_osd_linger_request *lreq;
2710 2711
	struct list_head pending_item;
	unsigned long queued_stamp;
2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737

	union {
		struct {
			u64 notify_id;
			u64 notifier_id;
			void *payload; /* points into @msg front */
			size_t payload_len;

			struct ceph_msg *msg; /* for ceph_msg_put() */
		} notify;
		struct {
			int err;
		} error;
	};
};

static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
				       work_func_t workfn)
{
	struct linger_work *lwork;

	lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
	if (!lwork)
		return NULL;

	INIT_WORK(&lwork->work, workfn);
2738
	INIT_LIST_HEAD(&lwork->pending_item);
2739 2740 2741 2742 2743 2744 2745 2746 2747
	lwork->lreq = linger_get(lreq);

	return lwork;
}

static void lwork_free(struct linger_work *lwork)
{
	struct ceph_osd_linger_request *lreq = lwork->lreq;

2748 2749 2750 2751
	mutex_lock(&lreq->lock);
	list_del(&lwork->pending_item);
	mutex_unlock(&lreq->lock);

2752 2753 2754 2755 2756 2757 2758 2759 2760 2761
	linger_put(lreq);
	kfree(lwork);
}

static void lwork_queue(struct linger_work *lwork)
{
	struct ceph_osd_linger_request *lreq = lwork->lreq;
	struct ceph_osd_client *osdc = lreq->osdc;

	verify_lreq_locked(lreq);
2762 2763 2764 2765
	WARN_ON(!list_empty(&lwork->pending_item));

	lwork->queued_stamp = jiffies;
	list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778
	queue_work(osdc->notify_wq, &lwork->work);
}

static void do_watch_notify(struct work_struct *w)
{
	struct linger_work *lwork = container_of(w, struct linger_work, work);
	struct ceph_osd_linger_request *lreq = lwork->lreq;

	if (!linger_registered(lreq)) {
		dout("%s lreq %p not registered\n", __func__, lreq);
		goto out;
	}

2779
	WARN_ON(!lreq->is_watch);
2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841
	dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
	     __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
	     lwork->notify.payload_len);
	lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
		  lwork->notify.notifier_id, lwork->notify.payload,
		  lwork->notify.payload_len);

out:
	ceph_msg_put(lwork->notify.msg);
	lwork_free(lwork);
}

static void do_watch_error(struct work_struct *w)
{
	struct linger_work *lwork = container_of(w, struct linger_work, work);
	struct ceph_osd_linger_request *lreq = lwork->lreq;

	if (!linger_registered(lreq)) {
		dout("%s lreq %p not registered\n", __func__, lreq);
		goto out;
	}

	dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
	lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);

out:
	lwork_free(lwork);
}

static void queue_watch_error(struct ceph_osd_linger_request *lreq)
{
	struct linger_work *lwork;

	lwork = lwork_alloc(lreq, do_watch_error);
	if (!lwork) {
		pr_err("failed to allocate error-lwork\n");
		return;
	}

	lwork->error.err = lreq->last_error;
	lwork_queue(lwork);
}

static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
				       int result)
{
	if (!completion_done(&lreq->reg_commit_wait)) {
		lreq->reg_commit_error = (result <= 0 ? result : 0);
		complete_all(&lreq->reg_commit_wait);
	}
}

static void linger_commit_cb(struct ceph_osd_request *req)
{
	struct ceph_osd_linger_request *lreq = req->r_priv;

	mutex_lock(&lreq->lock);
	dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
	     lreq->linger_id, req->r_result);
	linger_reg_commit_complete(lreq, req->r_result);
	lreq->committed = true;

2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859
	if (!lreq->is_watch) {
		struct ceph_osd_data *osd_data =
		    osd_req_op_data(req, 0, notify, response_data);
		void *p = page_address(osd_data->pages[0]);

		WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
			osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);

		/* make note of the notify_id */
		if (req->r_ops[0].outdata_len >= sizeof(u64)) {
			lreq->notify_id = ceph_decode_64(&p);
			dout("lreq %p notify_id %llu\n", lreq,
			     lreq->notify_id);
		} else {
			dout("lreq %p no notify_id\n", lreq);
		}
	}

2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912
	mutex_unlock(&lreq->lock);
	linger_put(lreq);
}

static int normalize_watch_error(int err)
{
	/*
	 * Translate ENOENT -> ENOTCONN so that a delete->disconnection
	 * notification and a failure to reconnect because we raced with
	 * the delete appear the same to the user.
	 */
	if (err == -ENOENT)
		err = -ENOTCONN;

	return err;
}

static void linger_reconnect_cb(struct ceph_osd_request *req)
{
	struct ceph_osd_linger_request *lreq = req->r_priv;

	mutex_lock(&lreq->lock);
	dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
	     lreq, lreq->linger_id, req->r_result, lreq->last_error);
	if (req->r_result < 0) {
		if (!lreq->last_error) {
			lreq->last_error = normalize_watch_error(req->r_result);
			queue_watch_error(lreq);
		}
	}

	mutex_unlock(&lreq->lock);
	linger_put(lreq);
}

static void send_linger(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_request *req = lreq->reg_req;
	struct ceph_osd_req_op *op = &req->r_ops[0];

	verify_osdc_wrlocked(req->r_osdc);
	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);

	if (req->r_osd)
		cancel_linger_request(req);

	request_reinit(req);
	ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
	ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
	req->r_flags = lreq->t.flags;
	req->r_mtime = lreq->mtime;

	mutex_lock(&lreq->lock);
2913
	if (lreq->is_watch && lreq->committed) {
2914 2915 2916 2917 2918 2919 2920 2921
		WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
			op->watch.cookie != lreq->linger_id);
		op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
		op->watch.gen = ++lreq->register_gen;
		dout("lreq %p reconnect register_gen %u\n", lreq,
		     op->watch.gen);
		req->r_callback = linger_reconnect_cb;
	} else {
2922 2923 2924 2925
		if (!lreq->is_watch)
			lreq->notify_id = 0;
		else
			WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945
		dout("lreq %p register\n", lreq);
		req->r_callback = linger_commit_cb;
	}
	mutex_unlock(&lreq->lock);

	req->r_priv = linger_get(lreq);
	req->r_linger = true;

	submit_request(req, true);
}

static void linger_ping_cb(struct ceph_osd_request *req)
{
	struct ceph_osd_linger_request *lreq = req->r_priv;

	mutex_lock(&lreq->lock);
	dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
	     __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
	     lreq->last_error);
	if (lreq->register_gen == req->r_ops[0].watch.gen) {
2946 2947 2948
		if (!req->r_result) {
			lreq->watch_valid_thru = lreq->ping_sent;
		} else if (!lreq->last_error) {
2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966
			lreq->last_error = normalize_watch_error(req->r_result);
			queue_watch_error(lreq);
		}
	} else {
		dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
		     lreq->register_gen, req->r_ops[0].watch.gen);
	}

	mutex_unlock(&lreq->lock);
	linger_put(lreq);
}

static void send_linger_ping(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	struct ceph_osd_request *req = lreq->ping_req;
	struct ceph_osd_req_op *op = &req->r_ops[0];

2967
	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002
		dout("%s PAUSERD\n", __func__);
		return;
	}

	lreq->ping_sent = jiffies;
	dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
	     __func__, lreq, lreq->linger_id, lreq->ping_sent,
	     lreq->register_gen);

	if (req->r_osd)
		cancel_linger_request(req);

	request_reinit(req);
	target_copy(&req->r_t, &lreq->t);

	WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
		op->watch.cookie != lreq->linger_id ||
		op->watch.op != CEPH_OSD_WATCH_OP_PING);
	op->watch.gen = lreq->register_gen;
	req->r_callback = linger_ping_cb;
	req->r_priv = linger_get(lreq);
	req->r_linger = true;

	ceph_osdc_get_request(req);
	account_request(req);
	req->r_tid = atomic64_inc_return(&osdc->last_tid);
	link_request(lreq->osd, req);
	send_request(req);
}

static void linger_submit(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	struct ceph_osd *osd;

3003
	calc_target(osdc, &lreq->t, NULL, false);
3004 3005 3006 3007 3008 3009
	osd = lookup_create_osd(osdc, lreq->t.osd, true);
	link_linger(osd, lreq);

	send_linger(lreq);
}

I
Ilya Dryomov 已提交
3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	struct ceph_osd_linger_request *lookup_lreq;

	verify_osdc_wrlocked(osdc);

	lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
				       lreq->linger_id);
	if (!lookup_lreq)
		return;

	WARN_ON(lookup_lreq != lreq);
	erase_linger_mc(&osdc->linger_map_checks, lreq);
	linger_put(lreq);
}

3027 3028 3029 3030 3031
/*
 * @lreq has to be both registered and linked.
 */
static void __linger_cancel(struct ceph_osd_linger_request *lreq)
{
3032
	if (lreq->is_watch && lreq->ping_req->r_osd)
3033 3034 3035
		cancel_linger_request(lreq->ping_req);
	if (lreq->reg_req->r_osd)
		cancel_linger_request(lreq->reg_req);
I
Ilya Dryomov 已提交
3036
	cancel_linger_map_check(lreq);
3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050
	unlink_linger(lreq->osd, lreq);
	linger_unregister(lreq);
}

static void linger_cancel(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;

	down_write(&osdc->lock);
	if (__linger_registered(lreq))
		__linger_cancel(lreq);
	up_write(&osdc->lock);
}

I
Ilya Dryomov 已提交
3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133
static void send_linger_map_check(struct ceph_osd_linger_request *lreq);

static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	struct ceph_osdmap *map = osdc->osdmap;

	verify_osdc_wrlocked(osdc);
	WARN_ON(!map->epoch);

	if (lreq->register_gen) {
		lreq->map_dne_bound = map->epoch;
		dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
		     lreq, lreq->linger_id);
	} else {
		dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
		     __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
		     map->epoch);
	}

	if (lreq->map_dne_bound) {
		if (map->epoch >= lreq->map_dne_bound) {
			/* we had a new enough map */
			pr_info("linger_id %llu pool does not exist\n",
				lreq->linger_id);
			linger_reg_commit_complete(lreq, -ENOENT);
			__linger_cancel(lreq);
		}
	} else {
		send_linger_map_check(lreq);
	}
}

static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
{
	struct ceph_osd_client *osdc = &greq->monc->client->osdc;
	struct ceph_osd_linger_request *lreq;
	u64 linger_id = greq->private_data;

	WARN_ON(greq->result || !greq->u.newest);

	down_write(&osdc->lock);
	lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
	if (!lreq) {
		dout("%s linger_id %llu dne\n", __func__, linger_id);
		goto out_unlock;
	}

	dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
	     __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
	     greq->u.newest);
	if (!lreq->map_dne_bound)
		lreq->map_dne_bound = greq->u.newest;
	erase_linger_mc(&osdc->linger_map_checks, lreq);
	check_linger_pool_dne(lreq);

	linger_put(lreq);
out_unlock:
	up_write(&osdc->lock);
}

static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	struct ceph_osd_linger_request *lookup_lreq;
	int ret;

	verify_osdc_wrlocked(osdc);

	lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
				       lreq->linger_id);
	if (lookup_lreq) {
		WARN_ON(lookup_lreq != lreq);
		return;
	}

	linger_get(lreq);
	insert_linger_mc(&osdc->linger_map_checks, lreq);
	ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
					  linger_map_check_cb, lreq->linger_id);
	WARN_ON(ret);
}

3134 3135 3136 3137 3138 3139 3140 3141 3142
static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
{
	int ret;

	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
	ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
	return ret ?: lreq->reg_commit_error;
}

3143 3144 3145 3146 3147 3148 3149 3150 3151
static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
{
	int ret;

	dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
	ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
	return ret ?: lreq->notify_finish_error;
}

S
Sage Weil 已提交
3152
/*
3153 3154 3155 3156
 * Timeout callback, called every N seconds.  When 1 or more OSD
 * requests has been active for more than N seconds, we send a keepalive
 * (tag + timestamp) to its OSD to ensure any communications channel
 * reset is detected.
S
Sage Weil 已提交
3157 3158 3159 3160 3161
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
3162
	struct ceph_options *opts = osdc->client->options;
3163
	unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3164
	unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3165 3166
	LIST_HEAD(slow_osds);
	struct rb_node *n, *p;
S
Sage Weil 已提交
3167

3168 3169
	dout("%s osdc %p\n", __func__, osdc);
	down_write(&osdc->lock);
S
Sage Weil 已提交
3170

3171 3172 3173 3174 3175
	/*
	 * ping osds that are a bit slow.  this ensures that if there
	 * is a break in the TCP connection we will notice, and reopen
	 * a connection with that osd (from the fault callback).
	 */
3176 3177 3178 3179
	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
		bool found = false;

3180
		for (p = rb_first(&osd->o_requests); p; ) {
3181 3182 3183
			struct ceph_osd_request *req =
			    rb_entry(p, struct ceph_osd_request, r_node);

3184 3185
			p = rb_next(p); /* abort_request() */

3186 3187 3188 3189 3190
			if (time_before(req->r_stamp, cutoff)) {
				dout(" req %p tid %llu on osd%d is laggy\n",
				     req, req->r_tid, osd->o_osd);
				found = true;
			}
3191 3192 3193 3194 3195 3196
			if (opts->osd_request_timeout &&
			    time_before(req->r_start_stamp, expiry_cutoff)) {
				pr_err_ratelimited("tid %llu on osd%d timeout\n",
				       req->r_tid, osd->o_osd);
				abort_request(req, -ETIMEDOUT);
			}
3197
		}
3198 3199 3200 3201 3202 3203 3204 3205 3206
		for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
			struct ceph_osd_linger_request *lreq =
			    rb_entry(p, struct ceph_osd_linger_request, node);

			dout(" lreq %p linger_id %llu is served by osd%d\n",
			     lreq, lreq->linger_id, osd->o_osd);
			found = true;

			mutex_lock(&lreq->lock);
3207
			if (lreq->is_watch && lreq->committed && !lreq->last_error)
3208 3209 3210
				send_linger_ping(lreq);
			mutex_unlock(&lreq->lock);
		}
3211

3212 3213
		if (found)
			list_move_tail(&osd->o_keepalive_item, &slow_osds);
3214
	}
3215

3216 3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230
	if (opts->osd_request_timeout) {
		for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
			struct ceph_osd_request *req =
			    rb_entry(p, struct ceph_osd_request, r_node);

			p = rb_next(p); /* abort_request() */

			if (time_before(req->r_start_stamp, expiry_cutoff)) {
				pr_err_ratelimited("tid %llu on osd%d timeout\n",
				       req->r_tid, osdc->homeless_osd.o_osd);
				abort_request(req, -ETIMEDOUT);
			}
		}
	}

3231 3232 3233
	if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
		maybe_request_map(osdc);

3234
	while (!list_empty(&slow_osds)) {
3235 3236 3237
		struct ceph_osd *osd = list_first_entry(&slow_osds,
							struct ceph_osd,
							o_keepalive_item);
3238
		list_del_init(&osd->o_keepalive_item);
S
Sage Weil 已提交
3239 3240 3241
		ceph_con_keepalive(&osd->o_con);
	}

3242
	up_write(&osdc->lock);
3243 3244
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
S
Sage Weil 已提交
3245 3246
}

3247 3248 3249 3250 3251
static void handle_osds_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client,
			     osds_timeout_work.work);
3252
	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3253
	struct ceph_osd *osd, *nosd;
3254

3255
	dout("%s osdc %p\n", __func__, osdc);
3256
	down_write(&osdc->lock);
3257 3258 3259 3260
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
		if (time_before(jiffies, osd->lru_ttl))
			break;

3261
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3262
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3263
		close_osd(osd);
3264
	}
3265

3266
	up_write(&osdc->lock);
3267 3268 3269 3270
	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282 3283 3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294 3295 3296 3297 3298 3299 3300 3301 3302 3303 3304 3305
static int ceph_oloc_decode(void **p, void *end,
			    struct ceph_object_locator *oloc)
{
	u8 struct_v, struct_cv;
	u32 len;
	void *struct_end;
	int ret = 0;

	ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
	struct_v = ceph_decode_8(p);
	struct_cv = ceph_decode_8(p);
	if (struct_v < 3) {
		pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
			struct_v, struct_cv);
		goto e_inval;
	}
	if (struct_cv > 6) {
		pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
			struct_v, struct_cv);
		goto e_inval;
	}
	len = ceph_decode_32(p);
	ceph_decode_need(p, end, len, e_inval);
	struct_end = *p + len;

	oloc->pool = ceph_decode_64(p);
	*p += 4; /* skip preferred */

	len = ceph_decode_32(p);
	if (len > 0) {
		pr_warn("ceph_object_locator::key is set\n");
		goto e_inval;
	}

	if (struct_v >= 5) {
3306 3307
		bool changed = false;

3308 3309
		len = ceph_decode_32(p);
		if (len > 0) {
3310
			ceph_decode_need(p, end, len, e_inval);
3311 3312 3313
			if (!oloc->pool_ns ||
			    ceph_compare_string(oloc->pool_ns, *p, len))
				changed = true;
3314
			*p += len;
3315 3316 3317 3318 3319 3320 3321 3322
		} else {
			if (oloc->pool_ns)
				changed = true;
		}
		if (changed) {
			/* redirect changes namespace */
			pr_warn("ceph_object_locator::nspace is changed\n");
			goto e_inval;
3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345 3346 3347 3348 3349 3350 3351 3352 3353 3354 3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386
		}
	}

	if (struct_v >= 6) {
		s64 hash = ceph_decode_64(p);
		if (hash != -1) {
			pr_warn("ceph_object_locator::hash is set\n");
			goto e_inval;
		}
	}

	/* skip the rest */
	*p = struct_end;
out:
	return ret;

e_inval:
	ret = -EINVAL;
	goto out;
}

static int ceph_redirect_decode(void **p, void *end,
				struct ceph_request_redirect *redir)
{
	u8 struct_v, struct_cv;
	u32 len;
	void *struct_end;
	int ret;

	ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
	struct_v = ceph_decode_8(p);
	struct_cv = ceph_decode_8(p);
	if (struct_cv > 1) {
		pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
			struct_v, struct_cv);
		goto e_inval;
	}
	len = ceph_decode_32(p);
	ceph_decode_need(p, end, len, e_inval);
	struct_end = *p + len;

	ret = ceph_oloc_decode(p, end, &redir->oloc);
	if (ret)
		goto out;

	len = ceph_decode_32(p);
	if (len > 0) {
		pr_warn("ceph_request_redirect::object_name is set\n");
		goto e_inval;
	}

	len = ceph_decode_32(p);
	*p += len; /* skip osd_instructions */

	/* skip the rest */
	*p = struct_end;
out:
	return ret;

e_inval:
	ret = -EINVAL;
	goto out;
}

3387 3388 3389 3390 3391 3392 3393 3394 3395 3396 3397 3398 3399
struct MOSDOpReply {
	struct ceph_pg pgid;
	u64 flags;
	int result;
	u32 epoch;
	int num_ops;
	u32 outdata_len[CEPH_OSD_MAX_OPS];
	s32 rval[CEPH_OSD_MAX_OPS];
	int retry_attempt;
	struct ceph_eversion replay_version;
	u64 user_version;
	struct ceph_request_redirect redirect;
};
S
Sage Weil 已提交
3400

3401
static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
S
Sage Weil 已提交
3402
{
3403 3404 3405 3406
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
	u16 version = le16_to_cpu(msg->hdr.version);
	struct ceph_eversion bad_replay_version;
I
Ilya Dryomov 已提交
3407
	u8 decode_redir;
3408 3409 3410
	u32 len;
	int ret;
	int i;
3411

3412 3413 3414
	ceph_decode_32_safe(&p, end, len, e_inval);
	ceph_decode_need(&p, end, len, e_inval);
	p += len; /* skip oid */
3415

3416 3417 3418
	ret = ceph_decode_pgid(&p, end, &m->pgid);
	if (ret)
		return ret;
3419

3420 3421 3422 3423 3424 3425
	ceph_decode_64_safe(&p, end, m->flags, e_inval);
	ceph_decode_32_safe(&p, end, m->result, e_inval);
	ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
	memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
	p += sizeof(bad_replay_version);
	ceph_decode_32_safe(&p, end, m->epoch, e_inval);
3426

3427 3428 3429
	ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
	if (m->num_ops > ARRAY_SIZE(m->outdata_len))
		goto e_inval;
3430

3431 3432 3433
	ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
			 e_inval);
	for (i = 0; i < m->num_ops; i++) {
3434 3435
		struct ceph_osd_op *op = p;

3436
		m->outdata_len[i] = le32_to_cpu(op->payload_len);
3437 3438 3439
		p += sizeof(*op);
	}

3440 3441 3442
	ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
	for (i = 0; i < m->num_ops; i++)
		ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
S
Sage Weil 已提交
3443

3444 3445 3446 3447 3448 3449 3450 3451 3452
	if (version >= 5) {
		ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
		memcpy(&m->replay_version, p, sizeof(m->replay_version));
		p += sizeof(m->replay_version);
		ceph_decode_64_safe(&p, end, m->user_version, e_inval);
	} else {
		m->replay_version = bad_replay_version; /* struct */
		m->user_version = le64_to_cpu(m->replay_version.version);
	}
Y
Yan, Zheng 已提交
3453

3454 3455 3456
	if (version >= 6) {
		if (version >= 7)
			ceph_decode_8_safe(&p, end, decode_redir, e_inval);
I
Ilya Dryomov 已提交
3457 3458 3459 3460 3461 3462 3463
		else
			decode_redir = 1;
	} else {
		decode_redir = 0;
	}

	if (decode_redir) {
3464 3465 3466
		ret = ceph_redirect_decode(&p, end, &m->redirect);
		if (ret)
			return ret;
3467
	} else {
3468
		ceph_oloc_init(&m->redirect.oloc);
3469
	}
S
Sage Weil 已提交
3470

3471 3472 3473 3474 3475 3476 3477
	return 0;

e_inval:
	return -EINVAL;
}

/*
I
Ilya Dryomov 已提交
3478 3479
 * Handle MOSDOpReply.  Set ->r_result and call the callback if it is
 * specified.
3480
 */
3481
static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3482
{
3483
	struct ceph_osd_client *osdc = osd->o_osdc;
3484 3485 3486 3487 3488 3489 3490 3491 3492
	struct ceph_osd_request *req;
	struct MOSDOpReply m;
	u64 tid = le64_to_cpu(msg->hdr.tid);
	u32 data_len = 0;
	int ret;
	int i;

	dout("%s msg %p tid %llu\n", __func__, msg, tid);

3493 3494 3495 3496 3497 3498 3499 3500 3501
	down_read(&osdc->lock);
	if (!osd_registered(osd)) {
		dout("%s osd%d unknown\n", __func__, osd->o_osd);
		goto out_unlock_osdc;
	}
	WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));

	mutex_lock(&osd->lock);
	req = lookup_request(&osd->o_requests, tid);
3502
	if (!req) {
3503 3504
		dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
		goto out_unlock_session;
3505 3506
	}

3507
	m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3508
	ret = decode_MOSDOpReply(msg, &m);
3509
	m.redirect.oloc.pool_ns = NULL;
3510 3511 3512 3513 3514 3515 3516 3517 3518 3519 3520 3521 3522 3523 3524 3525
	if (ret) {
		pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
		       req->r_tid, ret);
		ceph_msg_dump(msg);
		goto fail_request;
	}
	dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
	     __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
	     m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
	     le64_to_cpu(m.replay_version.version), m.user_version);

	if (m.retry_attempt >= 0) {
		if (m.retry_attempt != req->r_attempts - 1) {
			dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
			     req, req->r_tid, m.retry_attempt,
			     req->r_attempts - 1);
3526
			goto out_unlock_session;
3527 3528 3529 3530 3531 3532 3533 3534
		}
	} else {
		WARN_ON(1); /* MOSDOpReply v4 is assumed */
	}

	if (!ceph_oloc_empty(&m.redirect.oloc)) {
		dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
		     m.redirect.oloc.pool);
3535 3536
		unlink_request(osd, req);
		mutex_unlock(&osd->lock);
3537

3538 3539 3540 3541 3542
		/*
		 * Not ceph_oloc_copy() - changing pool_ns is not
		 * supported.
		 */
		req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3543 3544 3545 3546
		req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
		req->r_tid = 0;
		__submit_request(req, false);
		goto out_unlock_osdc;
3547 3548
	}

3549 3550 3551 3552
	if (m.num_ops != req->r_num_ops) {
		pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
		       req->r_num_ops, req->r_tid);
		goto fail_request;
S
Sage Weil 已提交
3553
	}
3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565
	for (i = 0; i < req->r_num_ops; i++) {
		dout(" req %p tid %llu op %d rval %d len %u\n", req,
		     req->r_tid, i, m.rval[i], m.outdata_len[i]);
		req->r_ops[i].rval = m.rval[i];
		req->r_ops[i].outdata_len = m.outdata_len[i];
		data_len += m.outdata_len[i];
	}
	if (data_len != le32_to_cpu(msg->hdr.data_len)) {
		pr_err("sum of lens %u != %u for tid %llu\n", data_len,
		       le32_to_cpu(msg->hdr.data_len), req->r_tid);
		goto fail_request;
	}
I
Ilya Dryomov 已提交
3566 3567
	dout("%s req %p tid %llu result %d data_len %u\n", __func__,
	     req, req->r_tid, m.result, data_len);
S
Sage Weil 已提交
3568

I
Ilya Dryomov 已提交
3569 3570 3571 3572 3573 3574 3575
	/*
	 * Since we only ever request ONDISK, we should only ever get
	 * one (type of) reply back.
	 */
	WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
	req->r_result = m.result ?: data_len;
	finish_request(req);
3576 3577
	mutex_unlock(&osd->lock);
	up_read(&osdc->lock);
S
Sage Weil 已提交
3578

I
Ilya Dryomov 已提交
3579
	__complete_request(req);
S
Sage Weil 已提交
3580 3581
	return;

3582
fail_request:
I
Ilya Dryomov 已提交
3583
	complete_request(req, -EIO);
3584 3585 3586 3587
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
S
Sage Weil 已提交
3588 3589
}

I
Ilya Dryomov 已提交
3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601
static void set_pool_was_full(struct ceph_osd_client *osdc)
{
	struct rb_node *n;

	for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
		struct ceph_pg_pool_info *pi =
		    rb_entry(n, struct ceph_pg_pool_info, node);

		pi->was_full = __pool_full(pi);
	}
}

3602
static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
S
Sage Weil 已提交
3603
{
3604
	struct ceph_pg_pool_info *pi;
S
Sage Weil 已提交
3605

3606 3607 3608
	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
	if (!pi)
		return false;
S
Sage Weil 已提交
3609

3610
	return pi->was_full && !__pool_full(pi);
3611 3612
}

3613 3614 3615 3616 3617 3618
static enum calc_target_result
recalc_linger_target(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_client *osdc = lreq->osdc;
	enum calc_target_result ct_res;

3619
	ct_res = calc_target(osdc, &lreq->t, NULL, true);
3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632
	if (ct_res == CALC_TARGET_NEED_RESEND) {
		struct ceph_osd *osd;

		osd = lookup_create_osd(osdc, lreq->t.osd, true);
		if (osd != lreq->osd) {
			unlink_linger(lreq->osd, lreq);
			link_linger(osd, lreq);
		}
	}

	return ct_res;
}

3633
/*
3634
 * Requeue requests whose mapping to an OSD has changed.
3635
 */
3636 3637 3638 3639 3640 3641
static void scan_requests(struct ceph_osd *osd,
			  bool force_resend,
			  bool cleared_full,
			  bool check_pool_cleared_full,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
3642
{
3643 3644 3645 3646
	struct ceph_osd_client *osdc = osd->o_osdc;
	struct rb_node *n;
	bool force_resend_writes;

3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666
	for (n = rb_first(&osd->o_linger_requests); n; ) {
		struct ceph_osd_linger_request *lreq =
		    rb_entry(n, struct ceph_osd_linger_request, node);
		enum calc_target_result ct_res;

		n = rb_next(n); /* recalc_linger_target() */

		dout("%s lreq %p linger_id %llu\n", __func__, lreq,
		     lreq->linger_id);
		ct_res = recalc_linger_target(lreq);
		switch (ct_res) {
		case CALC_TARGET_NO_ACTION:
			force_resend_writes = cleared_full ||
			    (check_pool_cleared_full &&
			     pool_cleared_full(osdc, lreq->t.base_oloc.pool));
			if (!force_resend && !force_resend_writes)
				break;

			/* fall through */
		case CALC_TARGET_NEED_RESEND:
I
Ilya Dryomov 已提交
3667
			cancel_linger_map_check(lreq);
3668 3669 3670 3671 3672 3673 3674 3675 3676
			/*
			 * scan_requests() for the previous epoch(s)
			 * may have already added it to the list, since
			 * it's not unlinked here.
			 */
			if (list_empty(&lreq->scan_item))
				list_add_tail(&lreq->scan_item, need_resend_linger);
			break;
		case CALC_TARGET_POOL_DNE:
3677
			list_del_init(&lreq->scan_item);
I
Ilya Dryomov 已提交
3678
			check_linger_pool_dne(lreq);
3679 3680 3681 3682
			break;
		}
	}

3683 3684 3685 3686 3687
	for (n = rb_first(&osd->o_requests); n; ) {
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);
		enum calc_target_result ct_res;

I
Ilya Dryomov 已提交
3688
		n = rb_next(n); /* unlink_request(), check_pool_dne() */
3689 3690

		dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3691 3692
		ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
				     false);
3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704
		switch (ct_res) {
		case CALC_TARGET_NO_ACTION:
			force_resend_writes = cleared_full ||
			    (check_pool_cleared_full &&
			     pool_cleared_full(osdc, req->r_t.base_oloc.pool));
			if (!force_resend &&
			    (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
			     !force_resend_writes))
				break;

			/* fall through */
		case CALC_TARGET_NEED_RESEND:
I
Ilya Dryomov 已提交
3705
			cancel_map_check(req);
3706 3707 3708 3709
			unlink_request(osd, req);
			insert_request(need_resend, req);
			break;
		case CALC_TARGET_POOL_DNE:
I
Ilya Dryomov 已提交
3710
			check_pool_dne(req);
3711
			break;
3712
		}
3713
	}
3714
}
3715

I
Ilya Dryomov 已提交
3716
static int handle_one_map(struct ceph_osd_client *osdc,
3717 3718 3719
			  void *p, void *end, bool incremental,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
I
Ilya Dryomov 已提交
3720 3721 3722 3723 3724 3725
{
	struct ceph_osdmap *newmap;
	struct rb_node *n;
	bool skipped_map = false;
	bool was_full;

3726
	was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
I
Ilya Dryomov 已提交
3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763
	set_pool_was_full(osdc);

	if (incremental)
		newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
	else
		newmap = ceph_osdmap_decode(&p, end);
	if (IS_ERR(newmap))
		return PTR_ERR(newmap);

	if (newmap != osdc->osdmap) {
		/*
		 * Preserve ->was_full before destroying the old map.
		 * For pools that weren't in the old map, ->was_full
		 * should be false.
		 */
		for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
			struct ceph_pg_pool_info *pi =
			    rb_entry(n, struct ceph_pg_pool_info, node);
			struct ceph_pg_pool_info *old_pi;

			old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
			if (old_pi)
				pi->was_full = old_pi->was_full;
			else
				WARN_ON(pi->was_full);
		}

		if (osdc->osdmap->epoch &&
		    osdc->osdmap->epoch + 1 < newmap->epoch) {
			WARN_ON(incremental);
			skipped_map = true;
		}

		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = newmap;
	}

3764
	was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780
	scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
		      need_resend, need_resend_linger);

	for (n = rb_first(&osdc->osds); n; ) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);

		n = rb_next(n); /* close_osd() */

		scan_requests(osd, skipped_map, was_full, true, need_resend,
			      need_resend_linger);
		if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
		    memcmp(&osd->o_con.peer_addr,
			   ceph_osd_addr(osdc->osdmap, osd->o_osd),
			   sizeof(struct ceph_entity_addr)))
			close_osd(osd);
	}
I
Ilya Dryomov 已提交
3781 3782 3783

	return 0;
}
3784

3785 3786 3787 3788
static void kick_requests(struct ceph_osd_client *osdc,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
{
3789
	struct ceph_osd_linger_request *lreq, *nlreq;
3790
	enum calc_target_result ct_res;
3791 3792
	struct rb_node *n;

3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808
	/* make sure need_resend targets reflect latest map */
	for (n = rb_first(need_resend); n; ) {
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

		n = rb_next(n);

		if (req->r_t.epoch < osdc->osdmap->epoch) {
			ct_res = calc_target(osdc, &req->r_t, NULL, false);
			if (ct_res == CALC_TARGET_POOL_DNE) {
				erase_request(need_resend, req);
				check_pool_dne(req);
			}
		}
	}

3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821
	for (n = rb_first(need_resend); n; ) {
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);
		struct ceph_osd *osd;

		n = rb_next(n);
		erase_request(need_resend, req); /* before link_request() */

		osd = lookup_create_osd(osdc, req->r_t.osd, true);
		link_request(osd, req);
		if (!req->r_linger) {
			if (!osd_homeless(osd) && !req->r_t.paused)
				send_request(req);
3822 3823
		} else {
			cancel_linger_request(req);
3824 3825
		}
	}
3826 3827 3828 3829 3830 3831 3832

	list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
		if (!osd_homeless(lreq->osd))
			send_linger(lreq);

		list_del_init(&lreq->scan_item);
	}
3833 3834
}

S
Sage Weil 已提交
3835 3836 3837 3838 3839 3840 3841 3842 3843
/*
 * Process updated osd map.
 *
 * The message contains any number of incremental and full maps, normally
 * indicating some sort of topology change in the cluster.  Kick requests
 * off to different OSDs as needed.
 */
void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
{
I
Ilya Dryomov 已提交
3844 3845
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
S
Sage Weil 已提交
3846 3847 3848
	u32 nr_maps, maplen;
	u32 epoch;
	struct ceph_fsid fsid;
3849 3850
	struct rb_root need_resend = RB_ROOT;
	LIST_HEAD(need_resend_linger);
I
Ilya Dryomov 已提交
3851 3852 3853 3854
	bool handled_incremental = false;
	bool was_pauserd, was_pausewr;
	bool pauserd, pausewr;
	int err;
S
Sage Weil 已提交
3855

I
Ilya Dryomov 已提交
3856
	dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3857
	down_write(&osdc->lock);
S
Sage Weil 已提交
3858 3859 3860 3861

	/* verify fsid */
	ceph_decode_need(&p, end, sizeof(fsid), bad);
	ceph_decode_copy(&p, &fsid, sizeof(fsid));
3862
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
I
Ilya Dryomov 已提交
3863
		goto bad;
S
Sage Weil 已提交
3864

3865 3866 3867
	was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
	was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
		      ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
I
Ilya Dryomov 已提交
3868
		      have_pool_full(osdc);
3869

S
Sage Weil 已提交
3870 3871 3872 3873 3874
	/* incremental maps */
	ceph_decode_32_safe(&p, end, nr_maps, bad);
	dout(" %d inc maps\n", nr_maps);
	while (nr_maps > 0) {
		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3875 3876
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3877
		ceph_decode_need(&p, end, maplen, bad);
I
Ilya Dryomov 已提交
3878 3879
		if (osdc->osdmap->epoch &&
		    osdc->osdmap->epoch + 1 == epoch) {
S
Sage Weil 已提交
3880 3881
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
3882 3883
			err = handle_one_map(osdc, p, p + maplen, true,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3884
			if (err)
S
Sage Weil 已提交
3885
				goto bad;
I
Ilya Dryomov 已提交
3886
			handled_incremental = true;
S
Sage Weil 已提交
3887 3888 3889 3890
		} else {
			dout("ignoring incremental map %u len %d\n",
			     epoch, maplen);
		}
I
Ilya Dryomov 已提交
3891
		p += maplen;
S
Sage Weil 已提交
3892 3893
		nr_maps--;
	}
I
Ilya Dryomov 已提交
3894
	if (handled_incremental)
S
Sage Weil 已提交
3895 3896 3897 3898 3899 3900 3901
		goto done;

	/* full maps */
	ceph_decode_32_safe(&p, end, nr_maps, bad);
	dout(" %d full maps\n", nr_maps);
	while (nr_maps) {
		ceph_decode_need(&p, end, 2*sizeof(u32), bad);
3902 3903
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3904 3905 3906 3907
		ceph_decode_need(&p, end, maplen, bad);
		if (nr_maps > 1) {
			dout("skipping non-latest full map %u len %d\n",
			     epoch, maplen);
3908
		} else if (osdc->osdmap->epoch >= epoch) {
S
Sage Weil 已提交
3909 3910 3911 3912 3913
			dout("skipping full map %u len %d, "
			     "older than our %u\n", epoch, maplen,
			     osdc->osdmap->epoch);
		} else {
			dout("taking full map %u len %d\n", epoch, maplen);
3914 3915
			err = handle_one_map(osdc, p, p + maplen, false,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3916
			if (err)
S
Sage Weil 已提交
3917 3918 3919 3920 3921 3922 3923
				goto bad;
		}
		p += maplen;
		nr_maps--;
	}

done:
3924 3925 3926 3927 3928
	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
3929 3930 3931
	pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
	pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
		  ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
I
Ilya Dryomov 已提交
3932
		  have_pool_full(osdc);
3933 3934
	if (was_pauserd || was_pausewr || pauserd || pausewr ||
	    osdc->osdmap->epoch < osdc->epoch_barrier)
I
Ilya Dryomov 已提交
3935
		maybe_request_map(osdc);
3936

3937
	kick_requests(osdc, &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3938

3939
	ceph_osdc_abort_on_full(osdc);
I
Ilya Dryomov 已提交
3940 3941
	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			  osdc->osdmap->epoch);
3942
	up_write(&osdc->lock);
3943
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
3944 3945 3946 3947
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
3948
	ceph_msg_dump(msg);
3949 3950 3951 3952 3953 3954 3955 3956 3957 3958
	up_write(&osdc->lock);
}

/*
 * Resubmit requests pending on the given osd.
 */
static void kick_osd_requests(struct ceph_osd *osd)
{
	struct rb_node *n;

3959 3960
	clear_backoffs(osd);

3961
	for (n = rb_first(&osd->o_requests); n; ) {
3962 3963 3964
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

3965 3966
		n = rb_next(n); /* cancel_linger_request() */

3967 3968 3969
		if (!req->r_linger) {
			if (!req->r_t.paused)
				send_request(req);
3970 3971
		} else {
			cancel_linger_request(req);
3972 3973
		}
	}
3974 3975 3976 3977 3978 3979
	for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
		struct ceph_osd_linger_request *lreq =
		    rb_entry(n, struct ceph_osd_linger_request, node);

		send_linger(lreq);
	}
3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003
}

/*
 * If the osd connection drops, we need to resubmit all requests.
 */
static void osd_fault(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;

	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	down_write(&osdc->lock);
	if (!osd_registered(osd)) {
		dout("%s osd%d unknown\n", __func__, osd->o_osd);
		goto out_unlock;
	}

	if (!reopen_osd(osd))
		kick_osd_requests(osd);
	maybe_request_map(osdc);

out_unlock:
	up_write(&osdc->lock);
S
Sage Weil 已提交
4004 4005
}

4006 4007 4008 4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 4110 4111 4112 4113 4114 4115 4116 4117 4118 4119 4120 4121 4122 4123 4124 4125 4126 4127 4128 4129 4130 4131 4132 4133 4134 4135 4136 4137 4138 4139 4140 4141 4142 4143 4144 4145 4146 4147 4148 4149 4150 4151 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4165 4166 4167 4168 4169 4170 4171 4172 4173 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4184 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4198 4199 4200 4201 4202 4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222 4223 4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235 4236 4237 4238 4239 4240 4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260
struct MOSDBackoff {
	struct ceph_spg spgid;
	u32 map_epoch;
	u8 op;
	u64 id;
	struct ceph_hobject_id *begin;
	struct ceph_hobject_id *end;
};

static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m)
{
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
	u8 struct_v;
	u32 struct_len;
	int ret;

	ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len);
	if (ret)
		return ret;

	ret = ceph_decode_pgid(&p, end, &m->spgid.pgid);
	if (ret)
		return ret;

	ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval);
	ceph_decode_32_safe(&p, end, m->map_epoch, e_inval);
	ceph_decode_8_safe(&p, end, m->op, e_inval);
	ceph_decode_64_safe(&p, end, m->id, e_inval);

	m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO);
	if (!m->begin)
		return -ENOMEM;

	ret = decode_hoid(&p, end, m->begin);
	if (ret) {
		free_hoid(m->begin);
		return ret;
	}

	m->end = kzalloc(sizeof(*m->end), GFP_NOIO);
	if (!m->end) {
		free_hoid(m->begin);
		return -ENOMEM;
	}

	ret = decode_hoid(&p, end, m->end);
	if (ret) {
		free_hoid(m->begin);
		free_hoid(m->end);
		return ret;
	}

	return 0;

e_inval:
	return -EINVAL;
}

static struct ceph_msg *create_backoff_message(
				const struct ceph_osd_backoff *backoff,
				u32 map_epoch)
{
	struct ceph_msg *msg;
	void *p, *end;
	int msg_size;

	msg_size = CEPH_ENCODING_START_BLK_LEN +
			CEPH_PGID_ENCODING_LEN + 1; /* spgid */
	msg_size += 4 + 1 + 8; /* map_epoch, op, id */
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			hoid_encoding_size(backoff->begin);
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			hoid_encoding_size(backoff->end);

	msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true);
	if (!msg)
		return NULL;

	p = msg->front.iov_base;
	end = p + msg->front_alloc_len;

	encode_spgid(&p, &backoff->spgid);
	ceph_encode_32(&p, map_epoch);
	ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK);
	ceph_encode_64(&p, backoff->id);
	encode_hoid(&p, end, backoff->begin);
	encode_hoid(&p, end, backoff->end);
	BUG_ON(p != end);

	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);

	return msg;
}

static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m)
{
	struct ceph_spg_mapping *spg;
	struct ceph_osd_backoff *backoff;
	struct ceph_msg *msg;

	dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
	     m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);

	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid);
	if (!spg) {
		spg = alloc_spg_mapping();
		if (!spg) {
			pr_err("%s failed to allocate spg\n", __func__);
			return;
		}
		spg->spgid = m->spgid; /* struct */
		insert_spg_mapping(&osd->o_backoff_mappings, spg);
	}

	backoff = alloc_backoff();
	if (!backoff) {
		pr_err("%s failed to allocate backoff\n", __func__);
		return;
	}
	backoff->spgid = m->spgid; /* struct */
	backoff->id = m->id;
	backoff->begin = m->begin;
	m->begin = NULL; /* backoff now owns this */
	backoff->end = m->end;
	m->end = NULL;   /* ditto */

	insert_backoff(&spg->backoffs, backoff);
	insert_backoff_by_id(&osd->o_backoffs_by_id, backoff);

	/*
	 * Ack with original backoff's epoch so that the OSD can
	 * discard this if there was a PG split.
	 */
	msg = create_backoff_message(backoff, m->map_epoch);
	if (!msg) {
		pr_err("%s failed to allocate msg\n", __func__);
		return;
	}
	ceph_con_send(&osd->o_con, msg);
}

static bool target_contained_by(const struct ceph_osd_request_target *t,
				const struct ceph_hobject_id *begin,
				const struct ceph_hobject_id *end)
{
	struct ceph_hobject_id hoid;
	int cmp;

	hoid_fill_from_target(&hoid, t);
	cmp = hoid_compare(&hoid, begin);
	return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0);
}

static void handle_backoff_unblock(struct ceph_osd *osd,
				   const struct MOSDBackoff *m)
{
	struct ceph_spg_mapping *spg;
	struct ceph_osd_backoff *backoff;
	struct rb_node *n;

	dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd,
	     m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id);

	backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id);
	if (!backoff) {
		pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n",
		       __func__, osd->o_osd, m->spgid.pgid.pool,
		       m->spgid.pgid.seed, m->spgid.shard, m->id);
		return;
	}

	if (hoid_compare(backoff->begin, m->begin) &&
	    hoid_compare(backoff->end, m->end)) {
		pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n",
		       __func__, osd->o_osd, m->spgid.pgid.pool,
		       m->spgid.pgid.seed, m->spgid.shard, m->id);
		/* unblock it anyway... */
	}

	spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid);
	BUG_ON(!spg);

	erase_backoff(&spg->backoffs, backoff);
	erase_backoff_by_id(&osd->o_backoffs_by_id, backoff);
	free_backoff(backoff);

	if (RB_EMPTY_ROOT(&spg->backoffs)) {
		erase_spg_mapping(&osd->o_backoff_mappings, spg);
		free_spg_mapping(spg);
	}

	for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

		if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) {
			/*
			 * Match against @m, not @backoff -- the PG may
			 * have split on the OSD.
			 */
			if (target_contained_by(&req->r_t, m->begin, m->end)) {
				/*
				 * If no other installed backoff applies,
				 * resend.
				 */
				send_request(req);
			}
		}
	}
}

static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg)
{
	struct ceph_osd_client *osdc = osd->o_osdc;
	struct MOSDBackoff m;
	int ret;

	down_read(&osdc->lock);
	if (!osd_registered(osd)) {
		dout("%s osd%d unknown\n", __func__, osd->o_osd);
		up_read(&osdc->lock);
		return;
	}
	WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));

	mutex_lock(&osd->lock);
	ret = decode_MOSDBackoff(msg, &m);
	if (ret) {
		pr_err("failed to decode MOSDBackoff: %d\n", ret);
		ceph_msg_dump(msg);
		goto out_unlock;
	}

	switch (m.op) {
	case CEPH_OSD_BACKOFF_OP_BLOCK:
		handle_backoff_block(osd, &m);
		break;
	case CEPH_OSD_BACKOFF_OP_UNBLOCK:
		handle_backoff_unblock(osd, &m);
		break;
	default:
		pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op);
	}

	free_hoid(m.begin);
	free_hoid(m.end);

out_unlock:
	mutex_unlock(&osd->lock);
	up_read(&osdc->lock);
}

4261 4262 4263
/*
 * Process osd watch notifications
 */
4264 4265
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
4266
{
4267 4268 4269 4270 4271 4272 4273
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
	struct ceph_osd_linger_request *lreq;
	struct linger_work *lwork;
	u8 proto_ver, opcode;
	u64 cookie, notify_id;
	u64 notifier_id = 0;
4274
	s32 return_code = 0;
4275 4276
	void *payload = NULL;
	u32 payload_len = 0;
4277 4278 4279 4280

	ceph_decode_8_safe(&p, end, proto_ver, bad);
	ceph_decode_8_safe(&p, end, opcode, bad);
	ceph_decode_64_safe(&p, end, cookie, bad);
4281
	p += 8; /* skip ver */
4282 4283
	ceph_decode_64_safe(&p, end, notify_id, bad);

4284 4285 4286 4287 4288 4289 4290 4291
	if (proto_ver >= 1) {
		ceph_decode_32_safe(&p, end, payload_len, bad);
		ceph_decode_need(&p, end, payload_len, bad);
		payload = p;
		p += payload_len;
	}

	if (le16_to_cpu(msg->hdr.version) >= 2)
4292
		ceph_decode_32_safe(&p, end, return_code, bad);
4293 4294 4295 4296 4297 4298 4299 4300 4301 4302 4303 4304 4305

	if (le16_to_cpu(msg->hdr.version) >= 3)
		ceph_decode_64_safe(&p, end, notifier_id, bad);

	down_read(&osdc->lock);
	lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
	if (!lreq) {
		dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
		     cookie);
		goto out_unlock_osdc;
	}

	mutex_lock(&lreq->lock);
4306 4307
	dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
	     opcode, cookie, lreq, lreq->is_watch);
4308 4309 4310 4311 4312
	if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
		if (!lreq->last_error) {
			lreq->last_error = -ENOTCONN;
			queue_watch_error(lreq);
		}
4313 4314 4315 4316 4317 4318 4319 4320 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4331 4332 4333 4334 4335 4336 4337
	} else if (!lreq->is_watch) {
		/* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
		if (lreq->notify_id && lreq->notify_id != notify_id) {
			dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
			     lreq->notify_id, notify_id);
		} else if (!completion_done(&lreq->notify_finish_wait)) {
			struct ceph_msg_data *data =
			    list_first_entry_or_null(&msg->data,
						     struct ceph_msg_data,
						     links);

			if (data) {
				if (lreq->preply_pages) {
					WARN_ON(data->type !=
							CEPH_MSG_DATA_PAGES);
					*lreq->preply_pages = data->pages;
					*lreq->preply_len = data->length;
				} else {
					ceph_release_page_vector(data->pages,
					       calc_pages_for(0, data->length));
				}
			}
			lreq->notify_finish_error = return_code;
			complete_all(&lreq->notify_finish_wait);
		}
4338 4339 4340 4341 4342 4343
	} else {
		/* CEPH_WATCH_EVENT_NOTIFY */
		lwork = lwork_alloc(lreq, do_watch_notify);
		if (!lwork) {
			pr_err("failed to allocate notify-lwork\n");
			goto out_unlock_lreq;
4344 4345
		}

4346 4347 4348 4349 4350 4351
		lwork->notify.notify_id = notify_id;
		lwork->notify.notifier_id = notifier_id;
		lwork->notify.payload = payload;
		lwork->notify.payload_len = payload_len;
		lwork->notify.msg = ceph_msg_get(msg);
		lwork_queue(lwork);
4352
	}
4353

4354 4355 4356 4357
out_unlock_lreq:
	mutex_unlock(&lreq->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
4358 4359 4360 4361 4362 4363
	return;

bad:
	pr_err("osdc handle_watch_notify corrupt msg\n");
}

4364 4365 4366 4367 4368 4369 4370
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
4371 4372 4373
	down_read(&osdc->lock);
	submit_request(req, false);
	up_read(&osdc->lock);
4374

4375
	return 0;
S
Sage Weil 已提交
4376
}
4377
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
4378

4379
/*
4380 4381
 * Unregister a registered request.  The request is not completed:
 * ->r_result isn't set and __complete_request() isn't called.
4382 4383 4384 4385 4386
 */
void ceph_osdc_cancel_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;

4387 4388 4389 4390
	down_write(&osdc->lock);
	if (req->r_osd)
		cancel_request(req);
	up_write(&osdc->lock);
4391 4392 4393
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);

S
Sage Weil 已提交
4394
/*
I
Ilya Dryomov 已提交
4395
 * @timeout: in jiffies, 0 means "wait forever"
S
Sage Weil 已提交
4396
 */
I
Ilya Dryomov 已提交
4397 4398
static int wait_request_timeout(struct ceph_osd_request *req,
				unsigned long timeout)
S
Sage Weil 已提交
4399
{
I
Ilya Dryomov 已提交
4400
	long left;
4401

I
Ilya Dryomov 已提交
4402
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4403
	left = wait_for_completion_killable_timeout(&req->r_completion,
I
Ilya Dryomov 已提交
4404 4405 4406
						ceph_timeout_jiffies(timeout));
	if (left <= 0) {
		left = left ?: -ETIMEDOUT;
4407
		ceph_osdc_cancel_request(req);
I
Ilya Dryomov 已提交
4408 4409
	} else {
		left = req->r_result; /* completed */
S
Sage Weil 已提交
4410 4411
	}

I
Ilya Dryomov 已提交
4412 4413 4414 4415 4416 4417 4418 4419 4420 4421
	return left;
}

/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	return wait_request_timeout(req, 0);
S
Sage Weil 已提交
4422
}
4423
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
4424 4425 4426 4427 4428 4429

/*
 * sync - wait for all in-flight requests to flush.  avoid starvation.
 */
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
4430 4431
	struct rb_node *n, *p;
	u64 last_tid = atomic64_read(&osdc->last_tid);
S
Sage Weil 已提交
4432

4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447
again:
	down_read(&osdc->lock);
	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);

		mutex_lock(&osd->lock);
		for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
			struct ceph_osd_request *req =
			    rb_entry(p, struct ceph_osd_request, r_node);

			if (req->r_tid > last_tid)
				break;

			if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
				continue;
S
Sage Weil 已提交
4448

4449 4450 4451 4452 4453
			ceph_osdc_get_request(req);
			mutex_unlock(&osd->lock);
			up_read(&osdc->lock);
			dout("%s waiting on req %p tid %llu last_tid %llu\n",
			     __func__, req, req->r_tid, last_tid);
I
Ilya Dryomov 已提交
4454
			wait_for_completion(&req->r_completion);
4455 4456 4457
			ceph_osdc_put_request(req);
			goto again;
		}
S
Sage Weil 已提交
4458

4459
		mutex_unlock(&osd->lock);
S
Sage Weil 已提交
4460
	}
4461 4462 4463

	up_read(&osdc->lock);
	dout("%s done last_tid %llu\n", __func__, last_tid);
S
Sage Weil 已提交
4464
}
4465
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
4466

4467 4468 4469 4470 4471 4472 4473 4474 4475 4476 4477 4478 4479 4480 4481 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499 4500 4501 4502 4503 4504
static struct ceph_osd_request *
alloc_linger_request(struct ceph_osd_linger_request *lreq)
{
	struct ceph_osd_request *req;

	req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
	if (!req)
		return NULL;

	ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
	ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);

	if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
		ceph_osdc_put_request(req);
		return NULL;
	}

	return req;
}

/*
 * Returns a handle, caller owns a ref.
 */
struct ceph_osd_linger_request *
ceph_osdc_watch(struct ceph_osd_client *osdc,
		struct ceph_object_id *oid,
		struct ceph_object_locator *oloc,
		rados_watchcb2_t wcb,
		rados_watcherrcb_t errcb,
		void *data)
{
	struct ceph_osd_linger_request *lreq;
	int ret;

	lreq = linger_alloc(osdc);
	if (!lreq)
		return ERR_PTR(-ENOMEM);

4505
	lreq->is_watch = true;
4506 4507 4508
	lreq->wcb = wcb;
	lreq->errcb = errcb;
	lreq->data = data;
4509
	lreq->watch_valid_thru = jiffies;
4510 4511 4512

	ceph_oid_copy(&lreq->t.base_oid, oid);
	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4513
	lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4514
	ktime_get_real_ts64(&lreq->mtime);
4515 4516 4517 4518 4519 4520 4521 4522 4523 4524 4525 4526 4527 4528 4529 4530 4531 4532 4533 4534 4535 4536 4537 4538 4539 4540 4541 4542 4543 4544 4545 4546 4547 4548 4549 4550 4551 4552 4553 4554 4555 4556 4557 4558 4559 4560 4561 4562 4563 4564 4565 4566 4567 4568 4569 4570

	lreq->reg_req = alloc_linger_request(lreq);
	if (!lreq->reg_req) {
		ret = -ENOMEM;
		goto err_put_lreq;
	}

	lreq->ping_req = alloc_linger_request(lreq);
	if (!lreq->ping_req) {
		ret = -ENOMEM;
		goto err_put_lreq;
	}

	down_write(&osdc->lock);
	linger_register(lreq); /* before osd_req_op_* */
	osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
			      CEPH_OSD_WATCH_OP_WATCH);
	osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
			      CEPH_OSD_WATCH_OP_PING);
	linger_submit(lreq);
	up_write(&osdc->lock);

	ret = linger_reg_commit_wait(lreq);
	if (ret) {
		linger_cancel(lreq);
		goto err_put_lreq;
	}

	return lreq;

err_put_lreq:
	linger_put(lreq);
	return ERR_PTR(ret);
}
EXPORT_SYMBOL(ceph_osdc_watch);

/*
 * Releases a ref.
 *
 * Times out after mount_timeout to preserve rbd unmap behaviour
 * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
 * with mount_timeout").
 */
int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
		      struct ceph_osd_linger_request *lreq)
{
	struct ceph_options *opts = osdc->client->options;
	struct ceph_osd_request *req;
	int ret;

	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
	if (!req)
		return -ENOMEM;

	ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
	ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
4571
	req->r_flags = CEPH_OSD_FLAG_WRITE;
4572
	ktime_get_real_ts64(&req->r_mtime);
4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592
	osd_req_op_watch_init(req, 0, lreq->linger_id,
			      CEPH_OSD_WATCH_OP_UNWATCH);

	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
	if (ret)
		goto out_put_req;

	ceph_osdc_start_request(osdc, req, false);
	linger_cancel(lreq);
	linger_put(lreq);
	ret = wait_request_timeout(req, opts->mount_timeout);

out_put_req:
	ceph_osdc_put_request(req);
	return ret;
}
EXPORT_SYMBOL(ceph_osdc_unwatch);

static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
				      u64 notify_id, u64 cookie, void *payload,
4593
				      u32 payload_len)
4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608 4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629
{
	struct ceph_osd_req_op *op;
	struct ceph_pagelist *pl;
	int ret;

	op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);

	pl = kmalloc(sizeof(*pl), GFP_NOIO);
	if (!pl)
		return -ENOMEM;

	ceph_pagelist_init(pl);
	ret = ceph_pagelist_encode_64(pl, notify_id);
	ret |= ceph_pagelist_encode_64(pl, cookie);
	if (payload) {
		ret |= ceph_pagelist_encode_32(pl, payload_len);
		ret |= ceph_pagelist_append(pl, payload, payload_len);
	} else {
		ret |= ceph_pagelist_encode_32(pl, 0);
	}
	if (ret) {
		ceph_pagelist_release(pl);
		return -ENOMEM;
	}

	ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
	op->indata_len = pl->length;
	return 0;
}

int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
			 struct ceph_object_id *oid,
			 struct ceph_object_locator *oloc,
			 u64 notify_id,
			 u64 cookie,
			 void *payload,
4630
			 u32 payload_len)
4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4643 4644 4645 4646 4647 4648 4649 4650 4651 4652 4653 4654 4655 4656 4657 4658 4659 4660
{
	struct ceph_osd_request *req;
	int ret;

	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
	if (!req)
		return -ENOMEM;

	ceph_oid_copy(&req->r_base_oid, oid);
	ceph_oloc_copy(&req->r_base_oloc, oloc);
	req->r_flags = CEPH_OSD_FLAG_READ;

	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
	if (ret)
		goto out_put_req;

	ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
					 payload_len);
	if (ret)
		goto out_put_req;

	ceph_osdc_start_request(osdc, req, false);
	ret = ceph_osdc_wait_request(osdc, req);

out_put_req:
	ceph_osdc_put_request(req);
	return ret;
}
EXPORT_SYMBOL(ceph_osdc_notify_ack);

4661 4662
static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
				  u64 cookie, u32 prot_ver, u32 timeout,
4663
				  void *payload, u32 payload_len)
4664 4665 4666 4667 4668 4669 4670 4671 4672 4673 4674 4675 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4692 4693 4694 4695 4696 4697 4698 4699 4700 4701 4702
{
	struct ceph_osd_req_op *op;
	struct ceph_pagelist *pl;
	int ret;

	op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
	op->notify.cookie = cookie;

	pl = kmalloc(sizeof(*pl), GFP_NOIO);
	if (!pl)
		return -ENOMEM;

	ceph_pagelist_init(pl);
	ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
	ret |= ceph_pagelist_encode_32(pl, timeout);
	ret |= ceph_pagelist_encode_32(pl, payload_len);
	ret |= ceph_pagelist_append(pl, payload, payload_len);
	if (ret) {
		ceph_pagelist_release(pl);
		return -ENOMEM;
	}

	ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
	op->indata_len = pl->length;
	return 0;
}

/*
 * @timeout: in seconds
 *
 * @preply_{pages,len} are initialized both on success and error.
 * The caller is responsible for:
 *
 *     ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
 */
int ceph_osdc_notify(struct ceph_osd_client *osdc,
		     struct ceph_object_id *oid,
		     struct ceph_object_locator *oloc,
		     void *payload,
4703
		     u32 payload_len,
4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4730 4731 4732 4733 4734 4735 4736 4737 4738 4739 4740 4741 4742 4743 4744 4745 4746 4747 4748 4749 4750 4751 4752 4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770
		     u32 timeout,
		     struct page ***preply_pages,
		     size_t *preply_len)
{
	struct ceph_osd_linger_request *lreq;
	struct page **pages;
	int ret;

	WARN_ON(!timeout);
	if (preply_pages) {
		*preply_pages = NULL;
		*preply_len = 0;
	}

	lreq = linger_alloc(osdc);
	if (!lreq)
		return -ENOMEM;

	lreq->preply_pages = preply_pages;
	lreq->preply_len = preply_len;

	ceph_oid_copy(&lreq->t.base_oid, oid);
	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
	lreq->t.flags = CEPH_OSD_FLAG_READ;

	lreq->reg_req = alloc_linger_request(lreq);
	if (!lreq->reg_req) {
		ret = -ENOMEM;
		goto out_put_lreq;
	}

	/* for notify_id */
	pages = ceph_alloc_page_vector(1, GFP_NOIO);
	if (IS_ERR(pages)) {
		ret = PTR_ERR(pages);
		goto out_put_lreq;
	}

	down_write(&osdc->lock);
	linger_register(lreq); /* before osd_req_op_* */
	ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
				     timeout, payload, payload_len);
	if (ret) {
		linger_unregister(lreq);
		up_write(&osdc->lock);
		ceph_release_page_vector(pages, 1);
		goto out_put_lreq;
	}
	ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
						 response_data),
				 pages, PAGE_SIZE, 0, false, true);
	linger_submit(lreq);
	up_write(&osdc->lock);

	ret = linger_reg_commit_wait(lreq);
	if (!ret)
		ret = linger_notify_finish_wait(lreq);
	else
		dout("lreq %p failed to initiate notify %d\n", lreq, ret);

	linger_cancel(lreq);
out_put_lreq:
	linger_put(lreq);
	return ret;
}
EXPORT_SYMBOL(ceph_osdc_notify);

4771 4772 4773 4774 4775 4776 4777 4778 4779 4780 4781 4782 4783 4784 4785 4786 4787 4788 4789 4790 4791 4792 4793 4794 4795 4796 4797 4798 4799 4800 4801 4802 4803 4804
/*
 * Return the number of milliseconds since the watch was last
 * confirmed, or an error.  If there is an error, the watch is no
 * longer valid, and should be destroyed with ceph_osdc_unwatch().
 */
int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
			  struct ceph_osd_linger_request *lreq)
{
	unsigned long stamp, age;
	int ret;

	down_read(&osdc->lock);
	mutex_lock(&lreq->lock);
	stamp = lreq->watch_valid_thru;
	if (!list_empty(&lreq->pending_lworks)) {
		struct linger_work *lwork =
		    list_first_entry(&lreq->pending_lworks,
				     struct linger_work,
				     pending_item);

		if (time_before(lwork->queued_stamp, stamp))
			stamp = lwork->queued_stamp;
	}
	age = jiffies - stamp;
	dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
	     lreq, lreq->linger_id, age, lreq->last_error);
	/* we are truncating to msecs, so return a safe upper bound */
	ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);

	mutex_unlock(&lreq->lock);
	up_read(&osdc->lock);
	return ret;
}

4805 4806 4807 4808 4809 4810 4811 4812 4813 4814 4815 4816 4817 4818 4819 4820 4821 4822 4823 4824 4825 4826 4827 4828 4829 4830 4831 4832 4833 4834 4835 4836 4837 4838 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4850 4851 4852 4853 4854 4855 4856 4857 4858 4859 4860 4861 4862 4863 4864 4865 4866 4867 4868 4869 4870 4871 4872 4873 4874 4875 4876 4877 4878 4879 4880 4881 4882 4883 4884 4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896 4897 4898 4899 4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912
static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
{
	u8 struct_v;
	u32 struct_len;
	int ret;

	ret = ceph_start_decoding(p, end, 2, "watch_item_t",
				  &struct_v, &struct_len);
	if (ret)
		return ret;

	ceph_decode_copy(p, &item->name, sizeof(item->name));
	item->cookie = ceph_decode_64(p);
	*p += 4; /* skip timeout_seconds */
	if (struct_v >= 2) {
		ceph_decode_copy(p, &item->addr, sizeof(item->addr));
		ceph_decode_addr(&item->addr);
	}

	dout("%s %s%llu cookie %llu addr %s\n", __func__,
	     ENTITY_NAME(item->name), item->cookie,
	     ceph_pr_addr(&item->addr.in_addr));
	return 0;
}

static int decode_watchers(void **p, void *end,
			   struct ceph_watch_item **watchers,
			   u32 *num_watchers)
{
	u8 struct_v;
	u32 struct_len;
	int i;
	int ret;

	ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
				  &struct_v, &struct_len);
	if (ret)
		return ret;

	*num_watchers = ceph_decode_32(p);
	*watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
	if (!*watchers)
		return -ENOMEM;

	for (i = 0; i < *num_watchers; i++) {
		ret = decode_watcher(p, end, *watchers + i);
		if (ret) {
			kfree(*watchers);
			return ret;
		}
	}

	return 0;
}

/*
 * On success, the caller is responsible for:
 *
 *     kfree(watchers);
 */
int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
			    struct ceph_object_id *oid,
			    struct ceph_object_locator *oloc,
			    struct ceph_watch_item **watchers,
			    u32 *num_watchers)
{
	struct ceph_osd_request *req;
	struct page **pages;
	int ret;

	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
	if (!req)
		return -ENOMEM;

	ceph_oid_copy(&req->r_base_oid, oid);
	ceph_oloc_copy(&req->r_base_oloc, oloc);
	req->r_flags = CEPH_OSD_FLAG_READ;

	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
	if (ret)
		goto out_put_req;

	pages = ceph_alloc_page_vector(1, GFP_NOIO);
	if (IS_ERR(pages)) {
		ret = PTR_ERR(pages);
		goto out_put_req;
	}

	osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
	ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
						 response_data),
				 pages, PAGE_SIZE, 0, false, true);

	ceph_osdc_start_request(osdc, req, false);
	ret = ceph_osdc_wait_request(osdc, req);
	if (ret >= 0) {
		void *p = page_address(pages[0]);
		void *const end = p + req->r_ops[0].outdata_len;

		ret = decode_watchers(&p, end, watchers, num_watchers);
	}

out_put_req:
	ceph_osdc_put_request(req);
	return ret;
}
EXPORT_SYMBOL(ceph_osdc_list_watchers);

4913 4914 4915 4916
/*
 * Call all pending notify callbacks - for use after a watch is
 * unregistered, to make sure no more callbacks for it will be invoked
 */
S
stephen hemminger 已提交
4917
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
4918
{
4919
	dout("%s osdc %p\n", __func__, osdc);
4920 4921 4922 4923
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);

4924 4925 4926 4927 4928 4929 4930
void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
{
	down_read(&osdc->lock);
	maybe_request_map(osdc);
	up_read(&osdc->lock);
}
EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
4931

4932 4933 4934 4935
/*
 * Execute an OSD class method on an object.
 *
 * @flags: CEPH_OSD_FLAG_*
4936
 * @resp_len: in/out param for reply length
4937 4938 4939 4940 4941 4942 4943 4944 4945 4946 4947 4948
 */
int ceph_osdc_call(struct ceph_osd_client *osdc,
		   struct ceph_object_id *oid,
		   struct ceph_object_locator *oloc,
		   const char *class, const char *method,
		   unsigned int flags,
		   struct page *req_page, size_t req_len,
		   struct page *resp_page, size_t *resp_len)
{
	struct ceph_osd_request *req;
	int ret;

4949 4950 4951
	if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
		return -E2BIG;

4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4962 4963
	req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
	if (!req)
		return -ENOMEM;

	ceph_oid_copy(&req->r_base_oid, oid);
	ceph_oloc_copy(&req->r_base_oloc, oloc);
	req->r_flags = flags;

	ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
	if (ret)
		goto out_put_req;

4964
	ret = osd_req_op_cls_init(req, 0, class, method);
4965 4966 4967
	if (ret)
		goto out_put_req;

4968 4969 4970 4971 4972
	if (req_page)
		osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
						  0, false, false);
	if (resp_page)
		osd_req_op_cls_response_data_pages(req, 0, &resp_page,
4973
						   *resp_len, 0, false, false);
4974 4975 4976 4977 4978 4979 4980 4981 4982 4983 4984 4985 4986 4987 4988

	ceph_osdc_start_request(osdc, req, false);
	ret = ceph_osdc_wait_request(osdc, req);
	if (ret >= 0) {
		ret = req->r_ops[0].rval;
		if (resp_page)
			*resp_len = req->r_ops[0].outdata_len;
	}

out_put_req:
	ceph_osdc_put_request(req);
	return ret;
}
EXPORT_SYMBOL(ceph_osdc_call);

S
Sage Weil 已提交
4989 4990 4991 4992 4993 4994 4995 4996 4997
/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
4998
	init_rwsem(&osdc->lock);
S
Sage Weil 已提交
4999
	osdc->osds = RB_ROOT;
5000
	INIT_LIST_HEAD(&osdc->osd_lru);
5001
	spin_lock_init(&osdc->osd_lru_lock);
5002 5003 5004
	osd_init(&osdc->homeless_osd);
	osdc->homeless_osd.o_osdc = osdc;
	osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
5005
	osdc->last_linger_id = CEPH_LINGER_ID_START;
5006
	osdc->linger_requests = RB_ROOT;
I
Ilya Dryomov 已提交
5007 5008
	osdc->map_checks = RB_ROOT;
	osdc->linger_map_checks = RB_ROOT;
S
Sage Weil 已提交
5009
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
5010 5011
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);

5012
	err = -ENOMEM;
5013 5014 5015 5016
	osdc->osdmap = ceph_osdmap_alloc();
	if (!osdc->osdmap)
		goto out;

5017 5018
	osdc->req_mempool = mempool_create_slab_pool(10,
						     ceph_osd_request_cache);
S
Sage Weil 已提交
5019
	if (!osdc->req_mempool)
5020
		goto out_map;
S
Sage Weil 已提交
5021

5022
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
5023
				PAGE_SIZE, 10, true, "osd_op");
S
Sage Weil 已提交
5024
	if (err < 0)
5025
		goto out_mempool;
5026
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
5027
				PAGE_SIZE, 10, true, "osd_op_reply");
S
Sage Weil 已提交
5028 5029
	if (err < 0)
		goto out_msgpool;
5030

5031
	err = -ENOMEM;
5032
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
5033
	if (!osdc->notify_wq)
5034 5035
		goto out_msgpool_reply;

5036 5037 5038 5039
	osdc->completion_wq = create_singlethread_workqueue("ceph-completion");
	if (!osdc->completion_wq)
		goto out_notify_wq;

5040 5041
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
5042 5043 5044
	schedule_delayed_work(&osdc->osds_timeout_work,
	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));

S
Sage Weil 已提交
5045
	return 0;
5046

5047 5048
out_notify_wq:
	destroy_workqueue(osdc->notify_wq);
5049 5050
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
5051 5052
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
5053 5054
out_mempool:
	mempool_destroy(osdc->req_mempool);
5055 5056
out_map:
	ceph_osdmap_destroy(osdc->osdmap);
5057 5058
out:
	return err;
S
Sage Weil 已提交
5059 5060 5061 5062
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
5063
	destroy_workqueue(osdc->completion_wq);
5064
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
5065
	cancel_delayed_work_sync(&osdc->timeout_work);
5066
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
5067

5068
	down_write(&osdc->lock);
5069 5070 5071
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
5072
		close_osd(osd);
5073
	}
5074
	up_write(&osdc->lock);
5075
	WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5076 5077 5078
	osd_cleanup(&osdc->homeless_osd);

	WARN_ON(!list_empty(&osdc->osd_lru));
5079
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
I
Ilya Dryomov 已提交
5080 5081
	WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5082 5083
	WARN_ON(atomic_read(&osdc->num_requests));
	WARN_ON(atomic_read(&osdc->num_homeless));
5084

5085
	ceph_osdmap_destroy(osdc->osdmap);
S
Sage Weil 已提交
5086 5087
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
5088
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
5089 5090 5091 5092 5093 5094 5095 5096 5097 5098
}

/*
 * Read some contiguous pages.  If we cross a stripe boundary, shorten
 * *plen.  Return number of bytes read, or error.
 */
int ceph_osdc_readpages(struct ceph_osd_client *osdc,
			struct ceph_vino vino, struct ceph_file_layout *layout,
			u64 off, u64 *plen,
			u32 truncate_seq, u64 truncate_size,
5099
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
5100 5101 5102 5103 5104 5105
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
5106
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
S
Sage Weil 已提交
5107
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
5108
				    NULL, truncate_seq, truncate_size,
5109
				    false);
5110 5111
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
5112 5113

	/* it may be a short read due to an object boundary */
5114
	osd_req_op_extent_osd_data_pages(req, 0,
5115
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
5116

5117
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
5118
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
5119 5120 5121 5122 5123 5124 5125 5126 5127

	rc = ceph_osdc_start_request(osdc, req, false);
	if (!rc)
		rc = ceph_osdc_wait_request(osdc, req);

	ceph_osdc_put_request(req);
	dout("readpages result %d\n", rc);
	return rc;
}
5128
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
5129 5130 5131 5132 5133 5134 5135 5136 5137

/*
 * do a synchronous write on N pages
 */
int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
			 struct ceph_file_layout *layout,
			 struct ceph_snap_context *snapc,
			 u64 off, u64 len,
			 u32 truncate_seq, u64 truncate_size,
5138
			 struct timespec64 *mtime,
5139
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
5140 5141 5142
{
	struct ceph_osd_request *req;
	int rc = 0;
5143
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
5144

5145
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
5146
				    CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
5147
				    snapc, truncate_seq, truncate_size,
5148
				    true);
5149 5150
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
5151 5152

	/* it may be a short write due to an object boundary */
5153
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
5154 5155
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
5156

5157
	req->r_mtime = *mtime;
5158
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
5159 5160 5161 5162 5163 5164 5165 5166 5167
	if (!rc)
		rc = ceph_osdc_wait_request(osdc, req);

	ceph_osdc_put_request(req);
	if (rc == 0)
		rc = len;
	dout("writepages result %d\n", rc);
	return rc;
}
5168
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
5169

5170
int __init ceph_osdc_setup(void)
5171
{
5172 5173 5174
	size_t size = sizeof(struct ceph_osd_request) +
	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);

5175
	BUG_ON(ceph_osd_request_cache);
5176 5177
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
						   0, 0, NULL);
5178 5179 5180 5181 5182 5183 5184 5185 5186 5187 5188

	return ceph_osd_request_cache ? 0 : -ENOMEM;
}

void ceph_osdc_cleanup(void)
{
	BUG_ON(!ceph_osd_request_cache);
	kmem_cache_destroy(ceph_osd_request_cache);
	ceph_osd_request_cache = NULL;
}

S
Sage Weil 已提交
5189 5190 5191 5192 5193 5194
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
5195
	struct ceph_osd_client *osdc = osd->o_osdc;
S
Sage Weil 已提交
5196 5197 5198 5199 5200 5201 5202
	int type = le16_to_cpu(msg->hdr.type);

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
5203
		handle_reply(osd, msg);
S
Sage Weil 已提交
5204
		break;
5205 5206 5207
	case CEPH_MSG_OSD_BACKOFF:
		handle_backoff(osd, msg);
		break;
5208 5209 5210
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
5211 5212 5213 5214 5215

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
5216

S
Sage Weil 已提交
5217 5218 5219
	ceph_msg_put(msg);
}

5220
/*
5221 5222 5223
 * Lookup and return message for incoming reply.  Don't try to do
 * anything about a larger than preallocated data portion of the
 * message at the moment - for now, just skip the message.
5224 5225
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
5226 5227
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
5228 5229 5230
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
5231
	struct ceph_msg *m = NULL;
5232
	struct ceph_osd_request *req;
5233
	int front_len = le32_to_cpu(hdr->front_len);
5234
	int data_len = le32_to_cpu(hdr->data_len);
5235
	u64 tid = le64_to_cpu(hdr->tid);
S
Sage Weil 已提交
5236

5237 5238 5239 5240 5241 5242 5243 5244 5245 5246
	down_read(&osdc->lock);
	if (!osd_registered(osd)) {
		dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
		*skip = 1;
		goto out_unlock_osdc;
	}
	WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));

	mutex_lock(&osd->lock);
	req = lookup_request(&osd->o_requests, tid);
5247
	if (!req) {
5248 5249
		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
		     osd->o_osd, tid);
5250
		*skip = 1;
5251
		goto out_unlock_session;
5252
	}
S
Sage Weil 已提交
5253

5254
	ceph_msg_revoke_incoming(req->r_reply);
5255

5256
	if (front_len > req->r_reply->front_alloc_len) {
5257 5258 5259
		pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
			__func__, osd->o_osd, req->r_tid, front_len,
			req->r_reply->front_alloc_len);
5260 5261
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
5262
		if (!m)
5263
			goto out_unlock_session;
S
Sage Weil 已提交
5264 5265 5266
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
5267

5268 5269 5270 5271 5272 5273
	if (data_len > req->r_reply->data_length) {
		pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
			__func__, osd->o_osd, req->r_tid, data_len,
			req->r_reply->data_length);
		m = NULL;
		*skip = 1;
5274
		goto out_unlock_session;
5275
	}
5276 5277

	m = ceph_msg_get(req->r_reply);
S
Sage Weil 已提交
5278
	dout("get_reply tid %lld %p\n", tid, m);
5279

5280 5281 5282 5283
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
5284
	return m;
5285 5286
}

5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306
/*
 * TODO: switch to a msg-owned pagelist
 */
static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
{
	struct ceph_msg *m;
	int type = le16_to_cpu(hdr->type);
	u32 front_len = le32_to_cpu(hdr->front_len);
	u32 data_len = le32_to_cpu(hdr->data_len);

	m = ceph_msg_new(type, front_len, GFP_NOIO, false);
	if (!m)
		return NULL;

	if (data_len) {
		struct page **pages;
		struct ceph_osd_data osd_data;

		pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
					       GFP_NOIO);
5307
		if (IS_ERR(pages)) {
5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319
			ceph_msg_put(m);
			return NULL;
		}

		ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
					 false);
		ceph_osdc_msg_data_add(m, &osd_data);
	}

	return m;
}

5320 5321 5322 5323 5324 5325 5326
static struct ceph_msg *alloc_msg(struct ceph_connection *con,
				  struct ceph_msg_header *hdr,
				  int *skip)
{
	struct ceph_osd *osd = con->private;
	int type = le16_to_cpu(hdr->type);

A
Alex Elder 已提交
5327
	*skip = 0;
5328 5329
	switch (type) {
	case CEPH_MSG_OSD_MAP:
5330
	case CEPH_MSG_OSD_BACKOFF:
5331
	case CEPH_MSG_WATCH_NOTIFY:
5332
		return alloc_msg_with_page_vector(hdr);
5333 5334 5335
	case CEPH_MSG_OSD_OPREPLY:
		return get_reply(con, hdr, skip);
	default:
5336 5337
		pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
			osd->o_osd, type);
5338 5339 5340
		*skip = 1;
		return NULL;
	}
S
Sage Weil 已提交
5341 5342 5343 5344 5345 5346 5347 5348 5349 5350 5351 5352 5353 5354 5355 5356 5357 5358 5359
}

/*
 * Wrappers to refcount containing ceph_osd struct
 */
static struct ceph_connection *get_osd_con(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	if (get_osd(osd))
		return con;
	return NULL;
}

static void put_osd_con(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	put_osd(osd);
}

5360 5361 5362
/*
 * authentication
 */
5363 5364 5365 5366 5367
/*
 * Note: returned pointer is the address of a structure that's
 * managed separately.  Caller must *not* attempt to free it.
 */
static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
5368
					int *proto, int force_new)
5369 5370 5371 5372
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
5373
	struct ceph_auth_handshake *auth = &o->o_auth;
5374

5375
	if (force_new && auth->authorizer) {
5376
		ceph_auth_destroy_authorizer(auth->authorizer);
5377 5378
		auth->authorizer = NULL;
	}
5379 5380 5381
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
5382
		if (ret)
5383
			return ERR_PTR(ret);
5384 5385
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5386 5387 5388
						     auth);
		if (ret)
			return ERR_PTR(ret);
5389 5390
	}
	*proto = ac->protocol;
5391

5392
	return auth;
5393 5394
}

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Ilya Dryomov 已提交
5395 5396 5397 5398 5399 5400 5401 5402 5403 5404
static int add_authorizer_challenge(struct ceph_connection *con,
				    void *challenge_buf, int challenge_buf_len)
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

	return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
					    challenge_buf, challenge_buf_len);
}
5405

5406
static int verify_authorizer_reply(struct ceph_connection *con)
5407 5408 5409 5410 5411
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

5412
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5413 5414
}

5415 5416 5417 5418 5419 5420
static int invalidate_authorizer(struct ceph_connection *con)
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

5421
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5422 5423
	return ceph_monc_validate_auth(&osdc->client->monc);
}
5424

5425 5426
static void osd_reencode_message(struct ceph_msg *msg)
{
5427 5428 5429 5430
	int type = le16_to_cpu(msg->hdr.type);

	if (type == CEPH_MSG_OSD_OP)
		encode_request_finish(msg);
5431 5432
}

5433
static int osd_sign_message(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
5434
{
5435
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
5436
	struct ceph_auth_handshake *auth = &o->o_auth;
5437

Y
Yan, Zheng 已提交
5438 5439 5440
	return ceph_auth_sign_message(auth, msg);
}

5441
static int osd_check_message_signature(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
5442
{
5443
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
5444
	struct ceph_auth_handshake *auth = &o->o_auth;
5445

Y
Yan, Zheng 已提交
5446 5447 5448
	return ceph_auth_check_message_signature(auth, msg);
}

5449
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
5450 5451 5452
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
5453
	.get_authorizer = get_authorizer,
I
Ilya Dryomov 已提交
5454
	.add_authorizer_challenge = add_authorizer_challenge,
5455
	.verify_authorizer_reply = verify_authorizer_reply,
5456
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
5457
	.alloc_msg = alloc_msg,
5458
	.reencode_message = osd_reencode_message,
5459 5460
	.sign_message = osd_sign_message,
	.check_message_signature = osd_check_message_signature,
5461
	.fault = osd_fault,
S
Sage Weil 已提交
5462
};