osd_client.c 138.4 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,
				     struct ceph_bvec_iter *bvec_pos)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_BVECS;
	osd_data->bvec_pos = *bvec_pos;
}

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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_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);
	ceph_osd_data_bvecs_init(osd_data, bvec_pos);
}
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,
				       struct bio_vec *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, cls, request_data);
	ceph_osd_data_bvecs_init(osd_data, &it);
	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);
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	WARN_ON(kref_read(&req->r_kref) != 1);
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	request_release_checks(req);

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	WARN_ON(kref_read(&request_msg->kref) != 1);
	WARN_ON(kref_read(&reply_msg->kref) != 1);
540 541 542 543 544 545 546 547 548 549 550 551 552
	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;
}

553
struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
S
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554
					       struct ceph_snap_context *snapc,
555
					       unsigned int num_ops,
556
					       bool use_mempool,
557
					       gfp_t gfp_flags)
S
Sage Weil 已提交
558 559
{
	struct ceph_osd_request *req;
560

S
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561
	if (use_mempool) {
562
		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
563
		req = mempool_alloc(osdc->req_mempool, gfp_flags);
564 565
	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
S
Sage Weil 已提交
566
	} else {
567 568 569
		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
		req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
			      gfp_flags);
S
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570
	}
571
	if (unlikely(!req))
572
		return NULL;
S
Sage Weil 已提交
573

574
	request_init(req);
S
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575 576
	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
577
	req->r_num_ops = num_ops;
578 579
	req->r_snapid = CEPH_NOSNAP;
	req->r_snapc = ceph_get_snap_context(snapc);
580

581 582 583 584
	dout("%s req %p\n", __func__, req);
	return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
585

586
static int ceph_oloc_encoding_size(const struct ceph_object_locator *oloc)
587 588 589 590
{
	return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
}

591 592 593 594 595
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
Sage Weil 已提交
596

597
	WARN_ON(ceph_oid_empty(&req->r_base_oid));
598
	WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
599

600
	/* create request message */
601 602 603 604 605 606 607
	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 */
608 609
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
610 611
	msg_size += 4 + req->r_base_oid.name_len; /* oid */
	msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
612 613
	msg_size += 8; /* snapid */
	msg_size += 8; /* snap_seq */
614
	msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
615
	msg_size += 4 + 8; /* retry_attempt, features */
616

617
	if (req->r_mempool)
618
		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
S
Sage Weil 已提交
619
	else
620 621 622
		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
	if (!msg)
		return -ENOMEM;
623

S
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624
	memset(msg->front.iov_base, 0, msg->front.iov_len);
625 626
	req->r_request = msg;

627 628
	/* create reply message */
	msg_size = OSD_OPREPLY_FRONT_LEN;
629 630
	msg_size += req->r_base_oid.name_len;
	msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
631 632 633 634 635 636 637 638 639 640 641

	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;
642
}
643
EXPORT_SYMBOL(ceph_osdc_alloc_messages);
644

645
static bool osd_req_opcode_valid(u16 opcode)
646
{
647
	switch (opcode) {
648 649 650
#define GENERATE_CASE(op, opcode, str)	case CEPH_OSD_OP_##op: return true;
__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
#undef GENERATE_CASE
651 652 653 654 655
	default:
		return false;
	}
}

656 657 658 659 660
/*
 * 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.
 */
661
static struct ceph_osd_req_op *
A
Alex Elder 已提交
662
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
663
		 u16 opcode, u32 flags)
664
{
665 666 667
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
668 669
	BUG_ON(!osd_req_opcode_valid(opcode));

670
	op = &osd_req->r_ops[which];
671 672
	memset(op, 0, sizeof (*op));
	op->op = opcode;
673
	op->flags = flags;
674 675

	return op;
676 677
}

A
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678
void osd_req_op_init(struct ceph_osd_request *osd_req,
679
		     unsigned int which, u16 opcode, u32 flags)
A
Alex Elder 已提交
680
{
681
	(void)_osd_req_op_init(osd_req, which, opcode, flags);
A
Alex Elder 已提交
682 683 684
}
EXPORT_SYMBOL(osd_req_op_init);

685 686
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
687 688 689
				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
690 691
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
692 693
	size_t payload_len = 0;

L
Li Wang 已提交
694
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
695 696
	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
697 698 699 700 701

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
702
	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
703 704
		payload_len += length;

705
	op->indata_len = payload_len;
706 707 708
}
EXPORT_SYMBOL(osd_req_op_extent_init);

709 710
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
711
{
712 713 714 715 716 717
	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;
718 719 720 721 722 723

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

	op->extent.length = length;
724 725
	if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
		op->indata_len -= previous - length;
726 727 728
}
EXPORT_SYMBOL(osd_req_op_extent_update);

729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750
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);

751
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
752
			u16 opcode, const char *class, const char *method)
753
{
754 755
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
756
	struct ceph_pagelist *pagelist;
757 758 759 760 761
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

762 763 764 765
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

766 767 768 769
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
770
	ceph_pagelist_append(pagelist, class, size);
771 772 773 774 775 776
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
777
	ceph_pagelist_append(pagelist, method, size);
778 779
	payload_len += size;

780
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
781

782
	op->indata_len = payload_len;
783 784
}
EXPORT_SYMBOL(osd_req_op_cls_init);
785

786 787 788 789
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)
{
790 791
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814
	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);
815
	op->indata_len = payload_len;
816 817 818 819
	return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);

820 821 822 823 824
/*
 * @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)
825
{
826
	struct ceph_osd_req_op *op;
827

828
	op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
829
	op->watch.cookie = cookie;
830 831
	op->watch.op = watch_opcode;
	op->watch.gen = 0;
832 833
}

834 835 836 837 838 839
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,
840 841
						      CEPH_OSD_OP_SETALLOCHINT,
						      0);
842 843 844 845 846 847 848 849 850 851 852 853 854

	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);

855
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
856 857 858 859 860 861 862
				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)
863
			ceph_msg_data_add_pages(msg, osd_data->pages,
864 865 866
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
867
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
868 869
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
870
		ceph_msg_data_add_bio(msg, &osd_data->bio_pos, length);
871
#endif
872 873
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
		ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
874 875 876 877 878
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

879 880
static u32 osd_req_encode_op(struct ceph_osd_op *dst,
			     const struct ceph_osd_req_op *src)
881 882 883 884 885 886 887 888 889 890 891 892
{
	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:
893
	case CEPH_OSD_OP_WRITEFULL:
L
Li Wang 已提交
894 895
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_TRUNCATE:
896 897 898 899 900 901 902 903 904 905
		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;
906
		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
907 908 909
		break;
	case CEPH_OSD_OP_WATCH:
		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
910 911 912 913 914
		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:
915
		break;
916 917 918
	case CEPH_OSD_OP_NOTIFY:
		dst->notify.cookie = cpu_to_le64(src->notify.cookie);
		break;
919 920
	case CEPH_OSD_OP_LIST_WATCHERS:
		break;
921 922 923 924 925 926
	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;
927 928 929 930 931 932 933
	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;
934 935 936
	case CEPH_OSD_OP_CREATE:
	case CEPH_OSD_OP_DELETE:
		break;
937
	default:
938
		pr_err("unsupported osd opcode %s\n",
939
			ceph_osd_op_name(src->op));
940
		WARN_ON(1);
941 942

		return 0;
943
	}
944

945
	dst->op = cpu_to_le16(src->op);
946
	dst->flags = cpu_to_le32(src->flags);
947
	dst->payload_len = cpu_to_le32(src->indata_len);
948

949
	return src->indata_len;
950 951
}

952 953 954 955 956 957 958 959 960 961 962
/*
 * 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,
963 964
					       u64 off, u64 *plen,
					       unsigned int which, int num_ops,
965 966 967 968
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
969
					       bool use_mempool)
970
{
971
	struct ceph_osd_request *req;
972 973 974
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
975
	int r;
976

L
Li Wang 已提交
977
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
978 979
	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
980

981
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
982
					GFP_NOFS);
983 984 985 986
	if (!req) {
		r = -ENOMEM;
		goto fail;
	}
987

988
	/* calculate max write size */
989
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
990 991
	if (r)
		goto fail;
992

993
	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
994
		osd_req_op_init(req, which, opcode, 0);
995
	} else {
996
		u32 object_size = layout->object_size;
997 998 999 1000 1001 1002 1003 1004 1005
		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;
			}
1006
		}
1007
		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
1008 1009
				       truncate_size, truncate_seq);
	}
1010

1011
	req->r_abort_on_full = true;
1012
	req->r_flags = flags;
1013
	req->r_base_oloc.pool = layout->pool_id;
1014
	req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
1015
	ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
1016

1017 1018 1019 1020
	req->r_snapid = vino.snap;
	if (flags & CEPH_OSD_FLAG_WRITE)
		req->r_data_offset = off;

1021 1022 1023 1024
	r = ceph_osdc_alloc_messages(req, GFP_NOFS);
	if (r)
		goto fail;

S
Sage Weil 已提交
1025
	return req;
1026 1027 1028 1029

fail:
	ceph_osdc_put_request(req);
	return ERR_PTR(r);
S
Sage Weil 已提交
1030
}
1031
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
1032 1033 1034 1035

/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
I
Ilya Dryomov 已提交
1036
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
I
Ilya Dryomov 已提交
1037
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
S
Sage Weil 已提交
1038

1039 1040 1041 1042 1043
static bool osd_homeless(struct ceph_osd *osd)
{
	return osd->o_osd == CEPH_HOMELESS_OSD;
}

1044
static bool osd_registered(struct ceph_osd *osd)
S
Sage Weil 已提交
1045
{
1046
	verify_osdc_locked(osd->o_osdc);
S
Sage Weil 已提交
1047

1048
	return !RB_EMPTY_NODE(&osd->o_node);
S
Sage Weil 已提交
1049 1050
}

1051 1052 1053 1054 1055
/*
 * Assumes @osd is zero-initialized.
 */
static void osd_init(struct ceph_osd *osd)
{
1056
	refcount_set(&osd->o_ref, 1);
1057
	RB_CLEAR_NODE(&osd->o_node);
1058
	osd->o_requests = RB_ROOT;
1059
	osd->o_linger_requests = RB_ROOT;
1060 1061
	osd->o_backoff_mappings = RB_ROOT;
	osd->o_backoffs_by_id = RB_ROOT;
1062 1063 1064
	INIT_LIST_HEAD(&osd->o_osd_lru);
	INIT_LIST_HEAD(&osd->o_keepalive_item);
	osd->o_incarnation = 1;
1065
	mutex_init(&osd->lock);
1066 1067 1068 1069 1070
}

static void osd_cleanup(struct ceph_osd *osd)
{
	WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1071
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1072
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1073 1074
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoff_mappings));
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id));
1075 1076 1077 1078 1079 1080 1081 1082 1083
	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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1084 1085 1086
/*
 * Track open sessions with osds.
 */
1087
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
1088 1089 1090
{
	struct ceph_osd *osd;

1091 1092
	WARN_ON(onum == CEPH_HOMELESS_OSD);

1093
	osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1094
	osd_init(osd);
S
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1095
	osd->o_osdc = osdc;
1096
	osd->o_osd = onum;
S
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1097

1098
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1099

S
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1100 1101 1102 1103 1104
	return osd;
}

static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
1105 1106 1107
	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
1108 1109 1110 1111 1112 1113 1114 1115 1116
		return osd;
	} else {
		dout("get_osd %p FAIL\n", osd);
		return NULL;
	}
}

static void put_osd(struct ceph_osd *osd)
{
1117 1118 1119
	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)) {
1120
		osd_cleanup(osd);
S
Sage Weil 已提交
1121
		kfree(osd);
S
Sage Weil 已提交
1122
	}
S
Sage Weil 已提交
1123 1124
}

I
Ilya Dryomov 已提交
1125 1126
DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)

1127
static void __move_osd_to_lru(struct ceph_osd *osd)
1128
{
1129 1130 1131
	struct ceph_osd_client *osdc = osd->o_osdc;

	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1132
	BUG_ON(!list_empty(&osd->o_osd_lru));
1133

1134
	spin_lock(&osdc->osd_lru_lock);
1135
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1136 1137
	spin_unlock(&osdc->osd_lru_lock);

1138
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1139 1140
}

1141
static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1142
{
1143
	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1144
	    RB_EMPTY_ROOT(&osd->o_linger_requests))
1145
		__move_osd_to_lru(osd);
1146 1147
}

1148 1149
static void __remove_osd_from_lru(struct ceph_osd *osd)
{
1150 1151 1152 1153 1154
	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);
1155 1156
	if (!list_empty(&osd->o_osd_lru))
		list_del_init(&osd->o_osd_lru);
1157
	spin_unlock(&osdc->osd_lru_lock);
1158 1159
}

1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
/*
 * 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);
	}
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
	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);
	}
1195
	clear_backoffs(osd);
1196 1197 1198 1199 1200 1201

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

S
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1202 1203 1204
/*
 * reset osd connect
 */
1205
static int reopen_osd(struct ceph_osd *osd)
S
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1206
{
A
Alex Elder 已提交
1207
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1208

1209 1210 1211
	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1212
	    RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1213
		close_osd(osd);
A
Alex Elder 已提交
1214 1215 1216
		return -ENODEV;
	}

1217
	peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
A
Alex Elder 已提交
1218 1219
	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
			!ceph_con_opened(&osd->o_con)) {
1220
		struct rb_node *n;
A
Alex Elder 已提交
1221

1222 1223
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1224
		/* touch each r_stamp for handle_timeout()'s benfit */
1225 1226 1227
		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);
1228
			req->r_stamp = jiffies;
1229
		}
A
Alex Elder 已提交
1230 1231

		return -EAGAIN;
S
Sage Weil 已提交
1232
	}
A
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1233 1234 1235 1236 1237 1238

	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
1239 1240
}

1241 1242
static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
					  bool wrlocked)
S
Sage Weil 已提交
1243
{
1244
	struct ceph_osd *osd;
1245

1246 1247 1248 1249
	if (wrlocked)
		verify_osdc_wrlocked(osdc);
	else
		verify_osdc_locked(osdc);
S
Sage Weil 已提交
1250

1251 1252 1253 1254 1255 1256 1257
	if (o != CEPH_HOMELESS_OSD)
		osd = lookup_osd(&osdc->osds, o);
	else
		osd = &osdc->homeless_osd;
	if (!osd) {
		if (!wrlocked)
			return ERR_PTR(-EAGAIN);
1258

1259 1260 1261 1262
		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]);
1263
	}
S
Sage Weil 已提交
1264

1265 1266
	dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
	return osd;
S
Sage Weil 已提交
1267 1268 1269
}

/*
1270 1271 1272
 * Create request <-> OSD session relation.
 *
 * @req has to be assigned a tid, @osd may be homeless.
S
Sage Weil 已提交
1273
 */
1274
static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
S
Sage Weil 已提交
1275
{
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288
	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
1289 1290
}

1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307
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);
}

1308 1309 1310 1311 1312
static bool __pool_full(struct ceph_pg_pool_info *pi)
{
	return pi->flags & CEPH_POOL_FLAG_FULL;
}

I
Ilya Dryomov 已提交
1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327
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;
}

1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
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);
}

1339 1340 1341 1342
/*
 * Returns whether a request should be blocked from being sent
 * based on the current osdmap and osd_client settings.
 */
1343 1344 1345 1346
static bool target_should_be_paused(struct ceph_osd_client *osdc,
				    const struct ceph_osd_request_target *t,
				    struct ceph_pg_pool_info *pi)
{
1347 1348 1349
	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) ||
1350 1351
		       __pool_full(pi);

1352
	WARN_ON(pi->id != t->target_oloc.pool);
1353 1354 1355
	return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) ||
	       ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) ||
	       (osdc->osdmap->epoch < osdc->epoch_barrier);
1356 1357 1358 1359 1360 1361 1362 1363 1364 1365
}

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,
1366
					   struct ceph_connection *con,
1367 1368 1369 1370 1371 1372
					   bool any_change)
{
	struct ceph_pg_pool_info *pi;
	struct ceph_pg pgid, last_pgid;
	struct ceph_osds up, acting;
	bool force_resend = false;
1373 1374
	bool unpaused = false;
	bool legacy_change;
1375
	bool split = false;
1376
	bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1377 1378
	bool recovery_deletes = ceph_osdmap_flag(osdc,
						 CEPH_OSDMAP_RECOVERY_DELETES);
1379 1380 1381
	enum calc_target_result ct_res;
	int ret;

1382
	t->epoch = osdc->osdmap->epoch;
1383 1384 1385 1386 1387 1388 1389 1390
	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) {
1391 1392
		if (t->last_force_resend < pi->last_force_request_resend) {
			t->last_force_resend = pi->last_force_request_resend;
1393
			force_resend = true;
1394
		} else if (t->last_force_resend == 0) {
1395 1396 1397 1398
			force_resend = true;
		}
	}

1399 1400 1401 1402
	/* 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) {
1403 1404 1405 1406
		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;
1407 1408 1409 1410 1411 1412 1413

		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;
		}
1414 1415
	}

1416 1417
	ret = __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc,
					  &pgid);
1418 1419 1420 1421 1422 1423 1424 1425 1426
	if (ret) {
		WARN_ON(ret != -ENOENT);
		t->osd = CEPH_HOMELESS_OSD;
		ct_res = CALC_TARGET_POOL_DNE;
		goto out;
	}
	last_pgid.pool = pgid.pool;
	last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);

1427
	ceph_pg_to_up_acting_osds(osdc->osdmap, pi, &pgid, &up, &acting);
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440
	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,
1441 1442
				 t->recovery_deletes,
				 recovery_deletes,
1443 1444 1445 1446 1447
				 &last_pgid))
		force_resend = true;

	if (t->paused && !target_should_be_paused(osdc, t, pi)) {
		t->paused = false;
1448
		unpaused = true;
1449
	}
1450 1451
	legacy_change = ceph_pg_compare(&t->pgid, &pgid) ||
			ceph_osds_changed(&t->acting, &acting, any_change);
1452 1453
	if (t->pg_num)
		split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num);
1454

1455
	if (legacy_change || force_resend || split) {
1456
		t->pgid = pgid; /* struct */
1457
		ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid);
1458 1459 1460 1461 1462 1463 1464
		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;
1465
		t->recovery_deletes = recovery_deletes;
1466 1467 1468 1469

		t->osd = acting.primary;
	}

1470 1471 1472
	if (unpaused || legacy_change || force_resend ||
	    (split && con && CEPH_HAVE_FEATURE(con->peer_features,
					       RESEND_ON_SPLIT)))
1473 1474 1475 1476
		ct_res = CALC_TARGET_NEED_RESEND;
	else
		ct_res = CALC_TARGET_NO_ACTION;

1477 1478 1479 1480 1481
out:
	dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
	return ct_res;
}

1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 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
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;
}

1804 1805
static void setup_request_data(struct ceph_osd_request *req,
			       struct ceph_msg *msg)
S
Sage Weil 已提交
1806
{
1807 1808 1809 1810 1811
	u32 data_len = 0;
	int i;

	if (!list_empty(&msg->data))
		return;
S
Sage Weil 已提交
1812

1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829
	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;
1830 1831 1832 1833
		case CEPH_OSD_OP_NOTIFY_ACK:
			ceph_osdc_msg_data_add(msg,
					       &op->notify_ack.request_data);
			break;
1834 1835 1836 1837 1838 1839 1840 1841 1842 1843

		/* 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;
1844 1845 1846 1847
		case CEPH_OSD_OP_LIST_WATCHERS:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->list_watchers.response_data);
			break;
1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860

		/* 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;
1861 1862 1863 1864 1865 1866
		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;
1867 1868 1869 1870
		}

		data_len += op->indata_len;
	}
1871

1872 1873 1874
	WARN_ON(data_len != msg->data_length);
}

1875 1876 1877 1878 1879 1880 1881 1882
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 */
}

1883 1884 1885 1886 1887 1888 1889
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);
}

1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903
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);
}

1904 1905
static void encode_request_partial(struct ceph_osd_request *req,
				   struct ceph_msg *msg)
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921
{
	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);

1922 1923
	encode_spgid(&p, &req->r_t.spgid); /* actual spg */
	ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */
1924 1925
	ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
	ceph_encode_32(&p, req->r_flags);
1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936

	/* 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 */
1937 1938
	ceph_encode_timespec(p, &req->r_mtime);
	p += sizeof(struct ceph_timespec);
1939

1940 1941 1942
	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
1943

1944 1945 1946 1947 1948 1949
	/* 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);
	}
1950

1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962
	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 */
1963
	BUG_ON(p > end - 8); /* space for features */
1964

1965 1966
	msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */
	/* front_len is finalized in encode_request_finish() */
1967 1968
	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
1969 1970 1971 1972 1973 1974 1975
	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);
1976

1977 1978 1979 1980 1981 1982 1983
	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;
1984
	void *const partial_end = p + msg->front.iov_len;
1985 1986 1987 1988
	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 */
1989
		p = partial_end;
1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031
		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;
2032
		tail_len = partial_end - p;
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

		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));
2071 2072 2073 2074 2075 2076 2077 2078 2079
}

/*
 * @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;

2080
	verify_osd_locked(osd);
2081 2082
	WARN_ON(osd->o_osd != req->r_t.osd);

2083 2084 2085 2086
	/* backoff? */
	if (should_plug_request(req))
		return;

2087 2088 2089 2090 2091 2092 2093
	/*
	 * 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);

2094 2095 2096 2097 2098 2099
	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);

2100
	encode_request_partial(req, req->r_request);
2101

2102
	dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n",
2103
	     __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
2104
	     req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed,
2105 2106
	     req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, req->r_flags,
	     req->r_attempts);
2107 2108 2109 2110 2111 2112 2113 2114

	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
2115 2116
}

I
Ilya Dryomov 已提交
2117 2118 2119 2120
static void maybe_request_map(struct ceph_osd_client *osdc)
{
	bool continuous = false;

2121
	verify_osdc_locked(osdc);
I
Ilya Dryomov 已提交
2122 2123
	WARN_ON(!osdc->osdmap->epoch);

2124 2125 2126
	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
2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137
		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);
}

2138
static void complete_request(struct ceph_osd_request *req, int err);
I
Ilya Dryomov 已提交
2139 2140
static void send_map_check(struct ceph_osd_request *req);

2141
static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
2142
{
2143 2144
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd *osd;
I
Ilya Dryomov 已提交
2145
	enum calc_target_result ct_res;
2146 2147
	bool need_send = false;
	bool promoted = false;
2148
	bool need_abort = false;
2149

I
Ilya Dryomov 已提交
2150
	WARN_ON(req->r_tid);
2151 2152 2153
	dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);

again:
2154
	ct_res = calc_target(osdc, &req->r_t, NULL, false);
I
Ilya Dryomov 已提交
2155 2156 2157
	if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
		goto promote;

2158 2159 2160 2161
	osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
	if (IS_ERR(osd)) {
		WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
		goto promote;
2162 2163
	}

2164 2165 2166 2167 2168 2169 2170
	if (osdc->osdmap->epoch < osdc->epoch_barrier) {
		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)) {
2171 2172 2173 2174
		dout("req %p pausewr\n", req);
		req->r_t.paused = true;
		maybe_request_map(osdc);
	} else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
2175
		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2176 2177 2178 2179 2180 2181
		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)) &&
2182
		   (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
2183 2184 2185 2186 2187
		    pool_full(osdc, req->r_t.base_oloc.pool))) {
		dout("req %p full/pool_full\n", req);
		pr_warn_ratelimited("FULL or reached pool quota\n");
		req->r_t.paused = true;
		maybe_request_map(osdc);
2188 2189
		if (req->r_abort_on_full)
			need_abort = true;
2190 2191
	} else if (!osd_homeless(osd)) {
		need_send = true;
2192
	} else {
2193
		maybe_request_map(osdc);
2194 2195
	}

2196 2197 2198 2199 2200 2201 2202 2203 2204 2205
	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);
2206 2207
	else if (need_abort)
		complete_request(req, -ENOSPC);
2208 2209
	mutex_unlock(&osd->lock);

I
Ilya Dryomov 已提交
2210 2211 2212
	if (ct_res == CALC_TARGET_POOL_DNE)
		send_map_check(req);

2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226
	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)
{
2227
	WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK));
I
Ilya Dryomov 已提交
2228
	WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE)));
2229

I
Ilya Dryomov 已提交
2230
	req->r_flags |= CEPH_OSD_FLAG_ONDISK;
2231
	atomic_inc(&req->r_osdc->num_requests);
2232 2233

	req->r_start_stamp = jiffies;
2234 2235 2236 2237 2238 2239 2240 2241 2242
}

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

2243
static void finish_request(struct ceph_osd_request *req)
2244 2245 2246
{
	struct ceph_osd_client *osdc = req->r_osdc;

2247
	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
2248 2249
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);

2250 2251
	if (req->r_osd)
		unlink_request(req->r_osd, req);
2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263
	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);
}

2264 2265
static void __complete_request(struct ceph_osd_request *req)
{
I
Ilya Dryomov 已提交
2266 2267 2268
	if (req->r_callback) {
		dout("%s req %p tid %llu cb %pf result %d\n", __func__, req,
		     req->r_tid, req->r_callback, req->r_result);
2269
		req->r_callback(req);
I
Ilya Dryomov 已提交
2270
	}
2271 2272
}

I
Ilya Dryomov 已提交
2273
/*
I
Ilya Dryomov 已提交
2274
 * This is open-coded in handle_reply().
I
Ilya Dryomov 已提交
2275 2276 2277 2278 2279 2280
 */
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;
2281
	finish_request(req);
I
Ilya Dryomov 已提交
2282
	__complete_request(req);
I
Ilya Dryomov 已提交
2283
	complete_all(&req->r_completion);
I
Ilya Dryomov 已提交
2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302
	ceph_osdc_put_request(req);
}

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);
}

2303 2304 2305 2306
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
2307
	cancel_map_check(req);
2308
	finish_request(req);
I
Ilya Dryomov 已提交
2309
	complete_all(&req->r_completion);
2310
	ceph_osdc_put_request(req);
2311 2312
}

2313 2314 2315 2316 2317 2318 2319 2320
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);
}

2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346
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);

2347 2348
/*
 * Drop all pending requests that are stalled waiting on a full condition to
2349 2350 2351
 * 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.
2352 2353 2354 2355
 */
static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc)
{
	struct rb_node *n;
2356
	bool victims = false;
2357 2358 2359 2360 2361 2362

	dout("enter abort_on_full\n");

	if (!ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && !have_pool_full(osdc))
		goto out;

2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391
	/* Scan list and see if there is anything to abort */
	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
		struct rb_node *m;

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

			if (req->r_abort_on_full) {
				victims = true;
				break;
			}
		}
		if (victims)
			break;
	}

	if (!victims)
		goto out;

	/*
	 * Update the barrier to current epoch if it's behind that point,
	 * since we know we have some calls to be aborted in the tree.
	 */
	update_epoch_barrier(osdc, osdc->osdmap->epoch);

2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408
	for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
		struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
		struct rb_node *m;

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

			if (req->r_abort_on_full &&
			    (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
			     pool_full(osdc, req->r_t.target_oloc.pool)))
				abort_request(req, -ENOSPC);
		}
	}
out:
2409
	dout("return abort_on_full barrier=%u\n", osdc->epoch_barrier);
2410 2411
}

I
Ilya Dryomov 已提交
2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 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
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);
}

2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505
/*
 * 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
2506
	WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
2507
	WARN_ON(!list_empty(&lreq->scan_item));
2508
	WARN_ON(!list_empty(&lreq->pending_lworks));
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
	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
2545
	RB_CLEAR_NODE(&lreq->mc_node);
2546
	INIT_LIST_HEAD(&lreq->scan_item);
2547
	INIT_LIST_HEAD(&lreq->pending_lworks);
2548
	init_completion(&lreq->reg_commit_wait);
2549
	init_completion(&lreq->notify_finish_wait);
2550 2551 2552 2553 2554 2555 2556 2557 2558 2559

	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
2560
DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
2561 2562 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 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655

/*
 * 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;
2656 2657
	struct list_head pending_item;
	unsigned long queued_stamp;
2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683

	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);
2684
	INIT_LIST_HEAD(&lwork->pending_item);
2685 2686 2687 2688 2689 2690 2691 2692 2693
	lwork->lreq = linger_get(lreq);

	return lwork;
}

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

2694 2695 2696 2697
	mutex_lock(&lreq->lock);
	list_del(&lwork->pending_item);
	mutex_unlock(&lreq->lock);

2698 2699 2700 2701 2702 2703 2704 2705 2706 2707
	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);
2708 2709 2710 2711
	WARN_ON(!list_empty(&lwork->pending_item));

	lwork->queued_stamp = jiffies;
	list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724
	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;
	}

2725
	WARN_ON(!lreq->is_watch);
2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787
	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;

2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805
	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);
		}
	}

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 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858
	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);
2859
	if (lreq->is_watch && lreq->committed) {
2860 2861 2862 2863 2864 2865 2866 2867
		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 {
2868 2869 2870 2871
		if (!lreq->is_watch)
			lreq->notify_id = 0;
		else
			WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891
		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) {
2892 2893 2894
		if (!req->r_result) {
			lreq->watch_valid_thru = lreq->ping_sent;
		} else if (!lreq->last_error) {
2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912
			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];

2913
	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948
		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;

2949
	calc_target(osdc, &lreq->t, NULL, false);
2950 2951 2952 2953 2954 2955
	osd = lookup_create_osd(osdc, lreq->t.osd, true);
	link_linger(osd, lreq);

	send_linger(lreq);
}

I
Ilya Dryomov 已提交
2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972
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);
}

2973 2974 2975 2976 2977
/*
 * @lreq has to be both registered and linked.
 */
static void __linger_cancel(struct ceph_osd_linger_request *lreq)
{
2978
	if (lreq->is_watch && lreq->ping_req->r_osd)
2979 2980 2981
		cancel_linger_request(lreq->ping_req);
	if (lreq->reg_req->r_osd)
		cancel_linger_request(lreq->reg_req);
I
Ilya Dryomov 已提交
2982
	cancel_linger_map_check(lreq);
2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996
	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
2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 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
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);
}

3080 3081 3082 3083 3084 3085 3086 3087 3088
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;
}

3089 3090 3091 3092 3093 3094 3095 3096 3097
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
3098
/*
3099 3100 3101 3102
 * 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
3103 3104 3105 3106 3107
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
3108
	struct ceph_options *opts = osdc->client->options;
3109
	unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
3110
	unsigned long expiry_cutoff = jiffies - opts->osd_request_timeout;
3111 3112
	LIST_HEAD(slow_osds);
	struct rb_node *n, *p;
S
Sage Weil 已提交
3113

3114 3115
	dout("%s osdc %p\n", __func__, osdc);
	down_write(&osdc->lock);
S
Sage Weil 已提交
3116

3117 3118 3119 3120 3121
	/*
	 * 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).
	 */
3122 3123 3124 3125
	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;

3126
		for (p = rb_first(&osd->o_requests); p; ) {
3127 3128 3129
			struct ceph_osd_request *req =
			    rb_entry(p, struct ceph_osd_request, r_node);

3130 3131
			p = rb_next(p); /* abort_request() */

3132 3133 3134 3135 3136
			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;
			}
3137 3138 3139 3140 3141 3142
			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);
			}
3143
		}
3144 3145 3146 3147 3148 3149 3150 3151 3152
		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);
3153
			if (lreq->is_watch && lreq->committed && !lreq->last_error)
3154 3155 3156
				send_linger_ping(lreq);
			mutex_unlock(&lreq->lock);
		}
3157

3158 3159
		if (found)
			list_move_tail(&osd->o_keepalive_item, &slow_osds);
3160
	}
3161

3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176
	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);
			}
		}
	}

3177 3178 3179
	if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
		maybe_request_map(osdc);

3180
	while (!list_empty(&slow_osds)) {
3181 3182 3183
		struct ceph_osd *osd = list_first_entry(&slow_osds,
							struct ceph_osd,
							o_keepalive_item);
3184
		list_del_init(&osd->o_keepalive_item);
S
Sage Weil 已提交
3185 3186 3187
		ceph_con_keepalive(&osd->o_con);
	}

3188
	up_write(&osdc->lock);
3189 3190
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
S
Sage Weil 已提交
3191 3192
}

3193 3194 3195 3196 3197
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);
3198
	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
3199
	struct ceph_osd *osd, *nosd;
3200

3201
	dout("%s osdc %p\n", __func__, osdc);
3202
	down_write(&osdc->lock);
3203 3204 3205 3206
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
		if (time_before(jiffies, osd->lru_ttl))
			break;

3207
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
3208
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
3209
		close_osd(osd);
3210
	}
3211

3212
	up_write(&osdc->lock);
3213 3214 3215 3216
	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251
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) {
3252 3253
		bool changed = false;

3254 3255
		len = ceph_decode_32(p);
		if (len > 0) {
3256
			ceph_decode_need(p, end, len, e_inval);
3257 3258 3259
			if (!oloc->pool_ns ||
			    ceph_compare_string(oloc->pool_ns, *p, len))
				changed = true;
3260
			*p += len;
3261 3262 3263 3264 3265 3266 3267 3268
		} else {
			if (oloc->pool_ns)
				changed = true;
		}
		if (changed) {
			/* redirect changes namespace */
			pr_warn("ceph_object_locator::nspace is changed\n");
			goto e_inval;
3269 3270 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 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315 3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332
		}
	}

	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;
}

3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343 3344 3345
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
3346

3347
static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
S
Sage Weil 已提交
3348
{
3349 3350 3351 3352
	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
3353
	u8 decode_redir;
3354 3355 3356
	u32 len;
	int ret;
	int i;
3357

3358 3359 3360
	ceph_decode_32_safe(&p, end, len, e_inval);
	ceph_decode_need(&p, end, len, e_inval);
	p += len; /* skip oid */
3361

3362 3363 3364
	ret = ceph_decode_pgid(&p, end, &m->pgid);
	if (ret)
		return ret;
3365

3366 3367 3368 3369 3370 3371
	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);
3372

3373 3374 3375
	ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
	if (m->num_ops > ARRAY_SIZE(m->outdata_len))
		goto e_inval;
3376

3377 3378 3379
	ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
			 e_inval);
	for (i = 0; i < m->num_ops; i++) {
3380 3381
		struct ceph_osd_op *op = p;

3382
		m->outdata_len[i] = le32_to_cpu(op->payload_len);
3383 3384 3385
		p += sizeof(*op);
	}

3386 3387 3388
	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
3389

3390 3391 3392 3393 3394 3395 3396 3397 3398
	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
3399

3400 3401 3402
	if (version >= 6) {
		if (version >= 7)
			ceph_decode_8_safe(&p, end, decode_redir, e_inval);
I
Ilya Dryomov 已提交
3403 3404 3405 3406 3407 3408 3409
		else
			decode_redir = 1;
	} else {
		decode_redir = 0;
	}

	if (decode_redir) {
3410 3411 3412
		ret = ceph_redirect_decode(&p, end, &m->redirect);
		if (ret)
			return ret;
3413
	} else {
3414
		ceph_oloc_init(&m->redirect.oloc);
3415
	}
S
Sage Weil 已提交
3416

3417 3418 3419 3420 3421 3422 3423
	return 0;

e_inval:
	return -EINVAL;
}

/*
I
Ilya Dryomov 已提交
3424 3425
 * Handle MOSDOpReply.  Set ->r_result and call the callback if it is
 * specified.
3426
 */
3427
static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
3428
{
3429
	struct ceph_osd_client *osdc = osd->o_osdc;
3430 3431 3432 3433 3434 3435 3436 3437 3438
	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);

3439 3440 3441 3442 3443 3444 3445 3446 3447
	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);
3448
	if (!req) {
3449 3450
		dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
		goto out_unlock_session;
3451 3452
	}

3453
	m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
3454
	ret = decode_MOSDOpReply(msg, &m);
3455
	m.redirect.oloc.pool_ns = NULL;
3456 3457 3458 3459 3460 3461 3462 3463 3464 3465 3466 3467 3468 3469 3470 3471
	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);
3472
			goto out_unlock_session;
3473 3474 3475 3476 3477 3478 3479 3480
		}
	} 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);
3481 3482
		unlink_request(osd, req);
		mutex_unlock(&osd->lock);
3483

3484 3485 3486 3487 3488
		/*
		 * Not ceph_oloc_copy() - changing pool_ns is not
		 * supported.
		 */
		req->r_t.target_oloc.pool = m.redirect.oloc.pool;
3489 3490 3491 3492
		req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
		req->r_tid = 0;
		__submit_request(req, false);
		goto out_unlock_osdc;
3493 3494
	}

3495 3496 3497 3498
	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
3499
	}
3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511
	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
3512 3513
	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
3514

I
Ilya Dryomov 已提交
3515 3516 3517 3518 3519 3520 3521
	/*
	 * 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);
3522 3523
	mutex_unlock(&osd->lock);
	up_read(&osdc->lock);
S
Sage Weil 已提交
3524

I
Ilya Dryomov 已提交
3525 3526 3527
	__complete_request(req);
	complete_all(&req->r_completion);
	ceph_osdc_put_request(req);
S
Sage Weil 已提交
3528 3529
	return;

3530
fail_request:
I
Ilya Dryomov 已提交
3531
	complete_request(req, -EIO);
3532 3533 3534 3535
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
S
Sage Weil 已提交
3536 3537
}

I
Ilya Dryomov 已提交
3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549
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);
	}
}

3550
static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
S
Sage Weil 已提交
3551
{
3552
	struct ceph_pg_pool_info *pi;
S
Sage Weil 已提交
3553

3554 3555 3556
	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
	if (!pi)
		return false;
S
Sage Weil 已提交
3557

3558
	return pi->was_full && !__pool_full(pi);
3559 3560
}

3561 3562 3563 3564 3565 3566
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;

3567
	ct_res = calc_target(osdc, &lreq->t, NULL, true);
3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580
	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;
}

3581
/*
3582
 * Requeue requests whose mapping to an OSD has changed.
3583
 */
3584 3585 3586 3587 3588 3589
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)
3590
{
3591 3592 3593 3594
	struct ceph_osd_client *osdc = osd->o_osdc;
	struct rb_node *n;
	bool force_resend_writes;

3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614
	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
3615
			cancel_linger_map_check(lreq);
3616 3617 3618 3619 3620 3621 3622 3623 3624
			/*
			 * 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:
3625
			list_del_init(&lreq->scan_item);
I
Ilya Dryomov 已提交
3626
			check_linger_pool_dne(lreq);
3627 3628 3629 3630
			break;
		}
	}

3631 3632 3633 3634 3635
	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
3636
		n = rb_next(n); /* unlink_request(), check_pool_dne() */
3637 3638

		dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3639 3640
		ct_res = calc_target(osdc, &req->r_t, &req->r_osd->o_con,
				     false);
3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652
		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
3653
			cancel_map_check(req);
3654 3655 3656 3657
			unlink_request(osd, req);
			insert_request(need_resend, req);
			break;
		case CALC_TARGET_POOL_DNE:
I
Ilya Dryomov 已提交
3658
			check_pool_dne(req);
3659
			break;
3660
		}
3661
	}
3662
}
3663

I
Ilya Dryomov 已提交
3664
static int handle_one_map(struct ceph_osd_client *osdc,
3665 3666 3667
			  void *p, void *end, bool incremental,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
I
Ilya Dryomov 已提交
3668 3669 3670 3671 3672 3673
{
	struct ceph_osdmap *newmap;
	struct rb_node *n;
	bool skipped_map = false;
	bool was_full;

3674
	was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
I
Ilya Dryomov 已提交
3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711
	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;
	}

3712
	was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728
	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
3729 3730 3731

	return 0;
}
3732

3733 3734 3735 3736
static void kick_requests(struct ceph_osd_client *osdc,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
{
3737
	struct ceph_osd_linger_request *lreq, *nlreq;
3738
	enum calc_target_result ct_res;
3739 3740
	struct rb_node *n;

3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756
	/* 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);
			}
		}
	}

3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769
	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);
3770 3771
		} else {
			cancel_linger_request(req);
3772 3773
		}
	}
3774 3775 3776 3777 3778 3779 3780

	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);
	}
3781 3782
}

S
Sage Weil 已提交
3783 3784 3785 3786 3787 3788 3789 3790 3791
/*
 * 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
3792 3793
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
S
Sage Weil 已提交
3794 3795 3796
	u32 nr_maps, maplen;
	u32 epoch;
	struct ceph_fsid fsid;
3797 3798
	struct rb_root need_resend = RB_ROOT;
	LIST_HEAD(need_resend_linger);
I
Ilya Dryomov 已提交
3799 3800 3801 3802
	bool handled_incremental = false;
	bool was_pauserd, was_pausewr;
	bool pauserd, pausewr;
	int err;
S
Sage Weil 已提交
3803

I
Ilya Dryomov 已提交
3804
	dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3805
	down_write(&osdc->lock);
S
Sage Weil 已提交
3806 3807 3808 3809

	/* verify fsid */
	ceph_decode_need(&p, end, sizeof(fsid), bad);
	ceph_decode_copy(&p, &fsid, sizeof(fsid));
3810
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
I
Ilya Dryomov 已提交
3811
		goto bad;
S
Sage Weil 已提交
3812

3813 3814 3815
	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
3816
		      have_pool_full(osdc);
3817

S
Sage Weil 已提交
3818 3819 3820 3821 3822
	/* 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);
3823 3824
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3825
		ceph_decode_need(&p, end, maplen, bad);
I
Ilya Dryomov 已提交
3826 3827
		if (osdc->osdmap->epoch &&
		    osdc->osdmap->epoch + 1 == epoch) {
S
Sage Weil 已提交
3828 3829
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
3830 3831
			err = handle_one_map(osdc, p, p + maplen, true,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3832
			if (err)
S
Sage Weil 已提交
3833
				goto bad;
I
Ilya Dryomov 已提交
3834
			handled_incremental = true;
S
Sage Weil 已提交
3835 3836 3837 3838
		} else {
			dout("ignoring incremental map %u len %d\n",
			     epoch, maplen);
		}
I
Ilya Dryomov 已提交
3839
		p += maplen;
S
Sage Weil 已提交
3840 3841
		nr_maps--;
	}
I
Ilya Dryomov 已提交
3842
	if (handled_incremental)
S
Sage Weil 已提交
3843 3844 3845 3846 3847 3848 3849
		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);
3850 3851
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3852 3853 3854 3855
		ceph_decode_need(&p, end, maplen, bad);
		if (nr_maps > 1) {
			dout("skipping non-latest full map %u len %d\n",
			     epoch, maplen);
3856
		} else if (osdc->osdmap->epoch >= epoch) {
S
Sage Weil 已提交
3857 3858 3859 3860 3861
			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);
3862 3863
			err = handle_one_map(osdc, p, p + maplen, false,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3864
			if (err)
S
Sage Weil 已提交
3865 3866 3867 3868 3869 3870 3871
				goto bad;
		}
		p += maplen;
		nr_maps--;
	}

done:
3872 3873 3874 3875 3876
	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
3877 3878 3879
	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
3880
		  have_pool_full(osdc);
3881 3882
	if (was_pauserd || was_pausewr || pauserd || pausewr ||
	    osdc->osdmap->epoch < osdc->epoch_barrier)
I
Ilya Dryomov 已提交
3883
		maybe_request_map(osdc);
3884

3885
	kick_requests(osdc, &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3886

3887
	ceph_osdc_abort_on_full(osdc);
I
Ilya Dryomov 已提交
3888 3889
	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			  osdc->osdmap->epoch);
3890
	up_write(&osdc->lock);
3891
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
3892 3893 3894 3895
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
3896
	ceph_msg_dump(msg);
3897 3898 3899 3900 3901 3902 3903 3904 3905 3906
	up_write(&osdc->lock);
}

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

3907 3908
	clear_backoffs(osd);

3909
	for (n = rb_first(&osd->o_requests); n; ) {
3910 3911 3912
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

3913 3914
		n = rb_next(n); /* cancel_linger_request() */

3915 3916 3917
		if (!req->r_linger) {
			if (!req->r_t.paused)
				send_request(req);
3918 3919
		} else {
			cancel_linger_request(req);
3920 3921
		}
	}
3922 3923 3924 3925 3926 3927
	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);
	}
3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939 3940 3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951
}

/*
 * 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
3952 3953
}

3954 3955 3956 3957 3958 3959 3960 3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974 3975 3976 3977 3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003 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
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);
}

4209 4210 4211
/*
 * Process osd watch notifications
 */
4212 4213
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
4214
{
4215 4216 4217 4218 4219 4220 4221
	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;
4222
	s32 return_code = 0;
4223 4224
	void *payload = NULL;
	u32 payload_len = 0;
4225 4226 4227 4228

	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);
4229
	p += 8; /* skip ver */
4230 4231
	ceph_decode_64_safe(&p, end, notify_id, bad);

4232 4233 4234 4235 4236 4237 4238 4239
	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)
4240
		ceph_decode_32_safe(&p, end, return_code, bad);
4241 4242 4243 4244 4245 4246 4247 4248 4249 4250 4251 4252 4253

	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);
4254 4255
	dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
	     opcode, cookie, lreq, lreq->is_watch);
4256 4257 4258 4259 4260
	if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
		if (!lreq->last_error) {
			lreq->last_error = -ENOTCONN;
			queue_watch_error(lreq);
		}
4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4284 4285
	} 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);
		}
4286 4287 4288 4289 4290 4291
	} 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;
4292 4293
		}

4294 4295 4296 4297 4298 4299
		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);
4300
	}
4301

4302 4303 4304 4305
out_unlock_lreq:
	mutex_unlock(&lreq->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
4306 4307 4308 4309 4310 4311
	return;

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

4312 4313 4314 4315 4316 4317 4318
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
4319 4320 4321
	down_read(&osdc->lock);
	submit_request(req, false);
	up_read(&osdc->lock);
4322

4323
	return 0;
S
Sage Weil 已提交
4324
}
4325
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
4326

4327
/*
4328 4329
 * Unregister a registered request.  The request is not completed:
 * ->r_result isn't set and __complete_request() isn't called.
4330 4331 4332 4333 4334
 */
void ceph_osdc_cancel_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;

4335 4336 4337 4338
	down_write(&osdc->lock);
	if (req->r_osd)
		cancel_request(req);
	up_write(&osdc->lock);
4339 4340 4341
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);

S
Sage Weil 已提交
4342
/*
I
Ilya Dryomov 已提交
4343
 * @timeout: in jiffies, 0 means "wait forever"
S
Sage Weil 已提交
4344
 */
I
Ilya Dryomov 已提交
4345 4346
static int wait_request_timeout(struct ceph_osd_request *req,
				unsigned long timeout)
S
Sage Weil 已提交
4347
{
I
Ilya Dryomov 已提交
4348
	long left;
4349

I
Ilya Dryomov 已提交
4350
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
4351
	left = wait_for_completion_killable_timeout(&req->r_completion,
I
Ilya Dryomov 已提交
4352 4353 4354
						ceph_timeout_jiffies(timeout));
	if (left <= 0) {
		left = left ?: -ETIMEDOUT;
4355
		ceph_osdc_cancel_request(req);
I
Ilya Dryomov 已提交
4356 4357
	} else {
		left = req->r_result; /* completed */
S
Sage Weil 已提交
4358 4359
	}

I
Ilya Dryomov 已提交
4360 4361 4362 4363 4364 4365 4366 4367 4368 4369
	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
4370
}
4371
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
4372 4373 4374 4375 4376 4377

/*
 * sync - wait for all in-flight requests to flush.  avoid starvation.
 */
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
4378 4379
	struct rb_node *n, *p;
	u64 last_tid = atomic64_read(&osdc->last_tid);
S
Sage Weil 已提交
4380

4381 4382 4383 4384 4385 4386 4387 4388 4389 4390 4391 4392 4393 4394 4395
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
4396

4397 4398 4399 4400 4401
			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
4402
			wait_for_completion(&req->r_completion);
4403 4404 4405
			ceph_osdc_put_request(req);
			goto again;
		}
S
Sage Weil 已提交
4406

4407
		mutex_unlock(&osd->lock);
S
Sage Weil 已提交
4408
	}
4409 4410 4411

	up_read(&osdc->lock);
	dout("%s done last_tid %llu\n", __func__, last_tid);
S
Sage Weil 已提交
4412
}
4413
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
4414

4415 4416 4417 4418 4419 4420 4421 4422 4423 4424 4425 4426 4427 4428 4429 4430 4431 4432 4433 4434 4435 4436 4437 4438 4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451 4452
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);

4453
	lreq->is_watch = true;
4454 4455 4456
	lreq->wcb = wcb;
	lreq->errcb = errcb;
	lreq->data = data;
4457
	lreq->watch_valid_thru = jiffies;
4458 4459 4460

	ceph_oid_copy(&lreq->t.base_oid, oid);
	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
4461
	lreq->t.flags = CEPH_OSD_FLAG_WRITE;
4462
	ktime_get_real_ts(&lreq->mtime);
4463 4464 4465 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 4505 4506 4507 4508 4509 4510 4511 4512 4513 4514 4515 4516 4517 4518

	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);
4519
	req->r_flags = CEPH_OSD_FLAG_WRITE;
4520
	ktime_get_real_ts(&req->r_mtime);
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 4571 4572 4573 4574 4575 4576 4577 4578 4579 4580 4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592 4593 4594 4595 4596 4597 4598 4599 4600 4601 4602 4603 4604 4605 4606 4607 4608
	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,
				      size_t payload_len)
{
	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,
			 size_t payload_len)
{
	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);

4609 4610 4611 4612 4613 4614 4615 4616 4617 4618 4619 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 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 4661 4662 4663 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 4703 4704 4705 4706 4707 4708 4709 4710 4711 4712 4713 4714 4715 4716 4717 4718
static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
				  u64 cookie, u32 prot_ver, u32 timeout,
				  void *payload, size_t payload_len)
{
	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,
		     size_t payload_len,
		     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);

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
/*
 * 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;
}

4753 4754 4755 4756 4757 4758 4759 4760 4761 4762 4763 4764 4765 4766 4767 4768 4769 4770 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 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
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);

4861 4862 4863 4864
/*
 * 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
4865
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
4866
{
4867
	dout("%s osdc %p\n", __func__, osdc);
4868 4869 4870 4871
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);

4872 4873 4874 4875 4876 4877 4878
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);
4879

4880 4881 4882 4883
/*
 * Execute an OSD class method on an object.
 *
 * @flags: CEPH_OSD_FLAG_*
4884
 * @resp_len: in/out param for reply length
4885 4886 4887 4888 4889 4890 4891 4892 4893 4894 4895 4896
 */
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;

4897 4898 4899
	if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE))
		return -E2BIG;

4900 4901 4902 4903 4904 4905 4906 4907 4908 4909 4910 4911 4912 4913 4914 4915 4916 4917
	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;

	osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
	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,
4918
						   *resp_len, 0, false, false);
4919 4920 4921 4922 4923 4924 4925 4926 4927 4928 4929 4930 4931 4932 4933

	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
4934 4935 4936 4937 4938 4939 4940 4941 4942
/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
4943
	init_rwsem(&osdc->lock);
S
Sage Weil 已提交
4944
	osdc->osds = RB_ROOT;
4945
	INIT_LIST_HEAD(&osdc->osd_lru);
4946
	spin_lock_init(&osdc->osd_lru_lock);
4947 4948 4949
	osd_init(&osdc->homeless_osd);
	osdc->homeless_osd.o_osdc = osdc;
	osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
4950
	osdc->last_linger_id = CEPH_LINGER_ID_START;
4951
	osdc->linger_requests = RB_ROOT;
I
Ilya Dryomov 已提交
4952 4953
	osdc->map_checks = RB_ROOT;
	osdc->linger_map_checks = RB_ROOT;
S
Sage Weil 已提交
4954
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
4955 4956
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);

4957
	err = -ENOMEM;
4958 4959 4960 4961
	osdc->osdmap = ceph_osdmap_alloc();
	if (!osdc->osdmap)
		goto out;

4962 4963
	osdc->req_mempool = mempool_create_slab_pool(10,
						     ceph_osd_request_cache);
S
Sage Weil 已提交
4964
	if (!osdc->req_mempool)
4965
		goto out_map;
S
Sage Weil 已提交
4966

4967
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
4968
				PAGE_SIZE, 10, true, "osd_op");
S
Sage Weil 已提交
4969
	if (err < 0)
4970
		goto out_mempool;
4971
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
4972
				PAGE_SIZE, 10, true, "osd_op_reply");
S
Sage Weil 已提交
4973 4974
	if (err < 0)
		goto out_msgpool;
4975

4976
	err = -ENOMEM;
4977
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
4978
	if (!osdc->notify_wq)
4979 4980
		goto out_msgpool_reply;

4981 4982
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
4983 4984 4985
	schedule_delayed_work(&osdc->osds_timeout_work,
	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));

S
Sage Weil 已提交
4986
	return 0;
4987

4988 4989
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
4990 4991
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
4992 4993
out_mempool:
	mempool_destroy(osdc->req_mempool);
4994 4995
out_map:
	ceph_osdmap_destroy(osdc->osdmap);
4996 4997
out:
	return err;
S
Sage Weil 已提交
4998 4999 5000 5001
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
5002 5003
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
5004
	cancel_delayed_work_sync(&osdc->timeout_work);
5005
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
5006

5007
	down_write(&osdc->lock);
5008 5009 5010
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
5011
		close_osd(osd);
5012
	}
5013
	up_write(&osdc->lock);
5014
	WARN_ON(refcount_read(&osdc->homeless_osd.o_ref) != 1);
5015 5016 5017
	osd_cleanup(&osdc->homeless_osd);

	WARN_ON(!list_empty(&osdc->osd_lru));
5018
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
I
Ilya Dryomov 已提交
5019 5020
	WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
5021 5022
	WARN_ON(atomic_read(&osdc->num_requests));
	WARN_ON(atomic_read(&osdc->num_homeless));
5023

5024
	ceph_osdmap_destroy(osdc->osdmap);
S
Sage Weil 已提交
5025 5026
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
5027
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
5028 5029 5030 5031 5032 5033 5034 5035 5036 5037
}

/*
 * 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,
5038
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
5039 5040 5041 5042 5043 5044
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
5045
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
S
Sage Weil 已提交
5046
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
5047
				    NULL, truncate_seq, truncate_size,
5048
				    false);
5049 5050
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
5051 5052

	/* it may be a short read due to an object boundary */
5053
	osd_req_op_extent_osd_data_pages(req, 0,
5054
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
5055

5056
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
5057
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
5058 5059 5060 5061 5062 5063 5064 5065 5066

	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;
}
5067
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
5068 5069 5070 5071 5072 5073 5074 5075 5076 5077

/*
 * 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,
			 struct timespec *mtime,
5078
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
5079 5080 5081
{
	struct ceph_osd_request *req;
	int rc = 0;
5082
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
5083

5084
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
5085
				    CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE,
5086
				    snapc, truncate_seq, truncate_size,
5087
				    true);
5088 5089
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
5090 5091

	/* it may be a short write due to an object boundary */
5092
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
5093 5094
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
5095

5096
	req->r_mtime = *mtime;
5097
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
5098 5099 5100 5101 5102 5103 5104 5105 5106
	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;
}
5107
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
5108

5109
int __init ceph_osdc_setup(void)
5110
{
5111 5112 5113
	size_t size = sizeof(struct ceph_osd_request) +
	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);

5114
	BUG_ON(ceph_osd_request_cache);
5115 5116
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
						   0, 0, NULL);
5117 5118 5119 5120 5121 5122 5123 5124 5125 5126 5127

	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
5128 5129 5130 5131 5132 5133
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
5134
	struct ceph_osd_client *osdc = osd->o_osdc;
S
Sage Weil 已提交
5135 5136 5137 5138 5139 5140 5141
	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:
5142
		handle_reply(osd, msg);
S
Sage Weil 已提交
5143
		break;
5144 5145 5146
	case CEPH_MSG_OSD_BACKOFF:
		handle_backoff(osd, msg);
		break;
5147 5148 5149
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
5150 5151 5152 5153 5154

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
5155

S
Sage Weil 已提交
5156 5157 5158
	ceph_msg_put(msg);
}

5159
/*
5160 5161 5162
 * 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.
5163 5164
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
5165 5166
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
5167 5168 5169
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
5170
	struct ceph_msg *m = NULL;
5171
	struct ceph_osd_request *req;
5172
	int front_len = le32_to_cpu(hdr->front_len);
5173
	int data_len = le32_to_cpu(hdr->data_len);
5174
	u64 tid = le64_to_cpu(hdr->tid);
S
Sage Weil 已提交
5175

5176 5177 5178 5179 5180 5181 5182 5183 5184 5185
	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);
5186
	if (!req) {
5187 5188
		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
		     osd->o_osd, tid);
5189
		*skip = 1;
5190
		goto out_unlock_session;
5191
	}
S
Sage Weil 已提交
5192

5193
	ceph_msg_revoke_incoming(req->r_reply);
5194

5195
	if (front_len > req->r_reply->front_alloc_len) {
5196 5197 5198
		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);
5199 5200
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
5201
		if (!m)
5202
			goto out_unlock_session;
S
Sage Weil 已提交
5203 5204 5205
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
5206

5207 5208 5209 5210 5211 5212
	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;
5213
		goto out_unlock_session;
5214
	}
5215 5216

	m = ceph_msg_get(req->r_reply);
S
Sage Weil 已提交
5217
	dout("get_reply tid %lld %p\n", tid, m);
5218

5219 5220 5221 5222
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
5223
	return m;
5224 5225
}

5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245
/*
 * 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);
5246
		if (IS_ERR(pages)) {
5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258
			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;
}

5259 5260 5261 5262 5263 5264 5265
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
5266
	*skip = 0;
5267 5268
	switch (type) {
	case CEPH_MSG_OSD_MAP:
5269
	case CEPH_MSG_OSD_BACKOFF:
5270
	case CEPH_MSG_WATCH_NOTIFY:
5271
		return alloc_msg_with_page_vector(hdr);
5272 5273 5274
	case CEPH_MSG_OSD_OPREPLY:
		return get_reply(con, hdr, skip);
	default:
5275 5276
		pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
			osd->o_osd, type);
5277 5278 5279
		*skip = 1;
		return NULL;
	}
S
Sage Weil 已提交
5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298
}

/*
 * 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);
}

5299 5300 5301
/*
 * authentication
 */
5302 5303 5304 5305 5306
/*
 * 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,
5307
					int *proto, int force_new)
5308 5309 5310 5311
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
5312
	struct ceph_auth_handshake *auth = &o->o_auth;
5313

5314
	if (force_new && auth->authorizer) {
5315
		ceph_auth_destroy_authorizer(auth->authorizer);
5316 5317
		auth->authorizer = NULL;
	}
5318 5319 5320
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
5321
		if (ret)
5322
			return ERR_PTR(ret);
5323 5324
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
5325 5326 5327
						     auth);
		if (ret)
			return ERR_PTR(ret);
5328 5329
	}
	*proto = ac->protocol;
5330

5331
	return auth;
5332 5333 5334
}


5335
static int verify_authorizer_reply(struct ceph_connection *con)
5336 5337 5338 5339 5340
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

5341
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
5342 5343
}

5344 5345 5346 5347 5348 5349
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;

5350
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
5351 5352
	return ceph_monc_validate_auth(&osdc->client->monc);
}
5353

5354 5355
static void osd_reencode_message(struct ceph_msg *msg)
{
5356 5357 5358 5359
	int type = le16_to_cpu(msg->hdr.type);

	if (type == CEPH_MSG_OSD_OP)
		encode_request_finish(msg);
5360 5361
}

5362
static int osd_sign_message(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
5363
{
5364
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
5365
	struct ceph_auth_handshake *auth = &o->o_auth;
5366

Y
Yan, Zheng 已提交
5367 5368 5369
	return ceph_auth_sign_message(auth, msg);
}

5370
static int osd_check_message_signature(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
5371
{
5372
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
5373
	struct ceph_auth_handshake *auth = &o->o_auth;
5374

Y
Yan, Zheng 已提交
5375 5376 5377
	return ceph_auth_check_message_signature(auth, msg);
}

5378
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
5379 5380 5381
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
5382 5383
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
5384
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
5385
	.alloc_msg = alloc_msg,
5386
	.reencode_message = osd_reencode_message,
5387 5388
	.sign_message = osd_sign_message,
	.check_message_signature = osd_check_message_signature,
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	.fault = osd_fault,
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Sage Weil 已提交
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};