osd_client.c 112.7 KB
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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/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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#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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#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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	int r;
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	/* object extent? */
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	r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
					  objoff, objlen);
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	if (r < 0)
		return r;
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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 bio *bio, size_t bio_length)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
	osd_data->bio = bio;
	osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */

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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 bio *bio, size_t 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, bio_length);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */

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_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 */
	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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	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 */
	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;

	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,
	     atomic_read(&req->r_kref.refcount));
	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,
		     atomic_read(&req->r_kref.refcount));
		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);
	init_completion(&req->r_safe_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);
	WARN_ON(atomic_read(&req->r_kref.refcount) != 1);
	request_release_checks(req);

	WARN_ON(atomic_read(&request_msg->kref.refcount) != 1);
	WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1);
	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;
}

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struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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					       struct ceph_snap_context *snapc,
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					       unsigned int num_ops,
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					       bool use_mempool,
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					       gfp_t gfp_flags)
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{
	struct ceph_osd_request *req;
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	if (use_mempool) {
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		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
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		req = mempool_alloc(osdc->req_mempool, gfp_flags);
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	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
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	} else {
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		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
		req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
			      gfp_flags);
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	}
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	if (unlikely(!req))
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		return NULL;
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	request_init(req);
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	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
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	req->r_num_ops = num_ops;
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	req->r_snapid = CEPH_NOSNAP;
	req->r_snapc = ceph_get_snap_context(snapc);
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	dout("%s req %p\n", __func__, req);
	return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
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static int ceph_oloc_encoding_size(struct ceph_object_locator *oloc)
{
	return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
}

543 544 545 546 547
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
548

549
	WARN_ON(ceph_oid_empty(&req->r_base_oid));
550
	WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
551

552
	/* create request message */
553 554
	msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
	msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
555 556
	msg_size += CEPH_ENCODING_START_BLK_LEN +
			ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
557
	msg_size += 1 + 8 + 4 + 4; /* pgid */
558 559
	msg_size += 4 + req->r_base_oid.name_len; /* oid */
	msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
560 561
	msg_size += 8; /* snapid */
	msg_size += 8; /* snap_seq */
562
	msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
563 564
	msg_size += 4; /* retry_attempt */

565
	if (req->r_mempool)
566
		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
S
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567
	else
568 569 570
		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
	if (!msg)
		return -ENOMEM;
571

S
Sage Weil 已提交
572
	memset(msg->front.iov_base, 0, msg->front.iov_len);
573 574
	req->r_request = msg;

575 576
	/* create reply message */
	msg_size = OSD_OPREPLY_FRONT_LEN;
577 578
	msg_size += req->r_base_oid.name_len;
	msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
579 580 581 582 583 584 585 586 587 588 589

	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;
590
}
591
EXPORT_SYMBOL(ceph_osdc_alloc_messages);
592

593
static bool osd_req_opcode_valid(u16 opcode)
594
{
595
	switch (opcode) {
596 597 598
#define GENERATE_CASE(op, opcode, str)	case CEPH_OSD_OP_##op: return true;
__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
#undef GENERATE_CASE
599 600 601 602 603
	default:
		return false;
	}
}

604 605 606 607 608
/*
 * 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.
 */
609
static struct ceph_osd_req_op *
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610
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
611
		 u16 opcode, u32 flags)
612
{
613 614 615
	struct ceph_osd_req_op *op;

	BUG_ON(which >= osd_req->r_num_ops);
616 617
	BUG_ON(!osd_req_opcode_valid(opcode));

618
	op = &osd_req->r_ops[which];
619 620
	memset(op, 0, sizeof (*op));
	op->op = opcode;
621
	op->flags = flags;
622 623

	return op;
624 625
}

A
Alex Elder 已提交
626
void osd_req_op_init(struct ceph_osd_request *osd_req,
627
		     unsigned int which, u16 opcode, u32 flags)
A
Alex Elder 已提交
628
{
629
	(void)_osd_req_op_init(osd_req, which, opcode, flags);
A
Alex Elder 已提交
630 631 632
}
EXPORT_SYMBOL(osd_req_op_init);

633 634
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
635 636 637
				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
638 639
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
640 641
	size_t payload_len = 0;

L
Li Wang 已提交
642
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
643 644
	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
645 646 647 648 649

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
650
	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
651 652
		payload_len += length;

653
	op->indata_len = payload_len;
654 655 656
}
EXPORT_SYMBOL(osd_req_op_extent_init);

657 658
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
659
{
660 661 662 663 664 665
	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;
666 667 668 669 670 671

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

	op->extent.length = length;
672
	op->indata_len -= previous - length;
673 674 675
}
EXPORT_SYMBOL(osd_req_op_extent_update);

676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697
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);

698
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
699
			u16 opcode, const char *class, const char *method)
700
{
701 702
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
703
	struct ceph_pagelist *pagelist;
704 705 706 707 708
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

709 710 711 712
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

713 714 715 716
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
717
	ceph_pagelist_append(pagelist, class, size);
718 719 720 721 722 723
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
724
	ceph_pagelist_append(pagelist, method, size);
725 726
	payload_len += size;

727
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
728

729
	op->indata_len = payload_len;
730 731
}
EXPORT_SYMBOL(osd_req_op_cls_init);
732

733 734 735 736
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)
{
737 738
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
	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);
762
	op->indata_len = payload_len;
763 764 765 766
	return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);

767 768 769 770 771
/*
 * @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)
772
{
773
	struct ceph_osd_req_op *op;
774

775
	op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
776
	op->watch.cookie = cookie;
777 778
	op->watch.op = watch_opcode;
	op->watch.gen = 0;
779 780
}

781 782 783 784 785 786
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,
787 788
						      CEPH_OSD_OP_SETALLOCHINT,
						      0);
789 790 791 792 793 794 795 796 797 798 799 800 801

	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);

802
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
803 804 805 806 807 808 809
				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)
810
			ceph_msg_data_add_pages(msg, osd_data->pages,
811 812 813
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
814
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
815 816
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
817
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
818 819 820 821 822 823
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

824 825
static u32 osd_req_encode_op(struct ceph_osd_op *dst,
			     const struct ceph_osd_req_op *src)
826 827 828 829 830 831 832 833 834 835 836 837
{
	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:
838
	case CEPH_OSD_OP_WRITEFULL:
L
Li Wang 已提交
839 840
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_TRUNCATE:
841 842 843 844 845 846 847 848 849 850
		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;
851
		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
852 853 854 855 856
		break;
	case CEPH_OSD_OP_STARTSYNC:
		break;
	case CEPH_OSD_OP_WATCH:
		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
857 858 859 860 861
		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:
862
		break;
863 864 865
	case CEPH_OSD_OP_NOTIFY:
		dst->notify.cookie = cpu_to_le64(src->notify.cookie);
		break;
866 867 868 869 870 871
	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;
872 873 874 875 876 877 878
	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;
879 880 881
	case CEPH_OSD_OP_CREATE:
	case CEPH_OSD_OP_DELETE:
		break;
882
	default:
883
		pr_err("unsupported osd opcode %s\n",
884
			ceph_osd_op_name(src->op));
885
		WARN_ON(1);
886 887

		return 0;
888
	}
889

890
	dst->op = cpu_to_le16(src->op);
891
	dst->flags = cpu_to_le32(src->flags);
892
	dst->payload_len = cpu_to_le32(src->indata_len);
893

894
	return src->indata_len;
895 896
}

897 898 899 900 901 902 903 904 905 906 907 908 909 910
/*
 * 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.)
 *
 * if @do_sync, include a 'startsync' command so that the osd will flush
 * data quickly.
 */
struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
					       struct ceph_file_layout *layout,
					       struct ceph_vino vino,
911 912
					       u64 off, u64 *plen,
					       unsigned int which, int num_ops,
913 914 915 916
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
917
					       bool use_mempool)
918
{
919
	struct ceph_osd_request *req;
920 921 922
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
923
	int r;
924

L
Li Wang 已提交
925
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
926 927
	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
928

929
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
930
					GFP_NOFS);
931 932 933 934
	if (!req) {
		r = -ENOMEM;
		goto fail;
	}
935

936
	/* calculate max write size */
937
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
938 939
	if (r)
		goto fail;
940

941
	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
942
		osd_req_op_init(req, which, opcode, 0);
943
	} else {
944
		u32 object_size = layout->object_size;
945 946 947 948 949 950 951 952 953
		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;
			}
954
		}
955
		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
956 957
				       truncate_size, truncate_seq);
	}
958

959
	req->r_flags = flags;
960
	req->r_base_oloc.pool = layout->pool_id;
961
	req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
962
	ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
963

964 965 966 967
	req->r_snapid = vino.snap;
	if (flags & CEPH_OSD_FLAG_WRITE)
		req->r_data_offset = off;

968 969 970 971
	r = ceph_osdc_alloc_messages(req, GFP_NOFS);
	if (r)
		goto fail;

S
Sage Weil 已提交
972
	return req;
973 974 975 976

fail:
	ceph_osdc_put_request(req);
	return ERR_PTR(r);
S
Sage Weil 已提交
977
}
978
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
979 980 981 982

/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
I
Ilya Dryomov 已提交
983
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
I
Ilya Dryomov 已提交
984
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
S
Sage Weil 已提交
985

986 987 988 989 990
static bool osd_homeless(struct ceph_osd *osd)
{
	return osd->o_osd == CEPH_HOMELESS_OSD;
}

991
static bool osd_registered(struct ceph_osd *osd)
S
Sage Weil 已提交
992
{
993
	verify_osdc_locked(osd->o_osdc);
S
Sage Weil 已提交
994

995
	return !RB_EMPTY_NODE(&osd->o_node);
S
Sage Weil 已提交
996 997
}

998 999 1000 1001 1002 1003 1004
/*
 * Assumes @osd is zero-initialized.
 */
static void osd_init(struct ceph_osd *osd)
{
	atomic_set(&osd->o_ref, 1);
	RB_CLEAR_NODE(&osd->o_node);
1005
	osd->o_requests = RB_ROOT;
1006
	osd->o_linger_requests = RB_ROOT;
1007 1008 1009
	INIT_LIST_HEAD(&osd->o_osd_lru);
	INIT_LIST_HEAD(&osd->o_keepalive_item);
	osd->o_incarnation = 1;
1010
	mutex_init(&osd->lock);
1011 1012 1013 1014 1015
}

static void osd_cleanup(struct ceph_osd *osd)
{
	WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
1016
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
1017
	WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
1018 1019 1020 1021 1022 1023 1024 1025 1026
	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
Sage Weil 已提交
1027 1028 1029
/*
 * Track open sessions with osds.
 */
1030
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
1031 1032 1033
{
	struct ceph_osd *osd;

1034 1035
	WARN_ON(onum == CEPH_HOMELESS_OSD);

1036
	osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
1037
	osd_init(osd);
S
Sage Weil 已提交
1038
	osd->o_osdc = osdc;
1039
	osd->o_osd = onum;
S
Sage Weil 已提交
1040

1041
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1042

S
Sage Weil 已提交
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
	return osd;
}

static struct ceph_osd *get_osd(struct ceph_osd *osd)
{
	if (atomic_inc_not_zero(&osd->o_ref)) {
		dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
		     atomic_read(&osd->o_ref));
		return osd;
	} else {
		dout("get_osd %p FAIL\n", osd);
		return NULL;
	}
}

static void put_osd(struct ceph_osd *osd)
{
	dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
	     atomic_read(&osd->o_ref) - 1);
1062
	if (atomic_dec_and_test(&osd->o_ref)) {
1063
		osd_cleanup(osd);
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		kfree(osd);
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	}
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}

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1068 1069
DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)

1070
static void __move_osd_to_lru(struct ceph_osd *osd)
1071
{
1072 1073 1074
	struct ceph_osd_client *osdc = osd->o_osdc;

	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
1075
	BUG_ON(!list_empty(&osd->o_osd_lru));
1076

1077
	spin_lock(&osdc->osd_lru_lock);
1078
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1079 1080
	spin_unlock(&osdc->osd_lru_lock);

1081
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1082 1083
}

1084
static void maybe_move_osd_to_lru(struct ceph_osd *osd)
1085
{
1086
	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1087
	    RB_EMPTY_ROOT(&osd->o_linger_requests))
1088
		__move_osd_to_lru(osd);
1089 1090
}

1091 1092
static void __remove_osd_from_lru(struct ceph_osd *osd)
{
1093 1094 1095 1096 1097
	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);
1098 1099
	if (!list_empty(&osd->o_osd_lru))
		list_del_init(&osd->o_osd_lru);
1100
	spin_unlock(&osdc->osd_lru_lock);
1101 1102
}

1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
/*
 * 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);
	}
1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137
	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);
	}
1138 1139 1140 1141 1142 1143

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

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/*
 * reset osd connect
 */
1147
static int reopen_osd(struct ceph_osd *osd)
S
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1148
{
A
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1149
	struct ceph_entity_addr *peer_addr;
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1150

1151 1152 1153
	dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);

	if (RB_EMPTY_ROOT(&osd->o_requests) &&
1154
	    RB_EMPTY_ROOT(&osd->o_linger_requests)) {
1155
		close_osd(osd);
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1156 1157 1158
		return -ENODEV;
	}

1159
	peer_addr = &osd->o_osdc->osdmap->osd_addr[osd->o_osd];
A
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1160 1161
	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
			!ceph_con_opened(&osd->o_con)) {
1162
		struct rb_node *n;
A
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1163

1164 1165
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1166
		/* touch each r_stamp for handle_timeout()'s benfit */
1167 1168 1169
		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);
1170
			req->r_stamp = jiffies;
1171
		}
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1172 1173

		return -EAGAIN;
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1174
	}
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1175 1176 1177 1178 1179 1180

	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;
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1181 1182
}

1183 1184
static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
					  bool wrlocked)
S
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1185
{
1186
	struct ceph_osd *osd;
1187

1188 1189 1190 1191
	if (wrlocked)
		verify_osdc_wrlocked(osdc);
	else
		verify_osdc_locked(osdc);
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1193 1194 1195 1196 1197 1198 1199
	if (o != CEPH_HOMELESS_OSD)
		osd = lookup_osd(&osdc->osds, o);
	else
		osd = &osdc->homeless_osd;
	if (!osd) {
		if (!wrlocked)
			return ERR_PTR(-EAGAIN);
1200

1201 1202 1203 1204
		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]);
1205
	}
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1206

1207 1208
	dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
	return osd;
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1209 1210 1211
}

/*
1212 1213 1214
 * Create request <-> OSD session relation.
 *
 * @req has to be assigned a tid, @osd may be homeless.
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1215
 */
1216
static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
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1217
{
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230
	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;
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1231 1232
}

1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
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);
}

1250 1251 1252 1253 1254
static bool __pool_full(struct ceph_pg_pool_info *pi)
{
	return pi->flags & CEPH_POOL_FLAG_FULL;
}

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Ilya Dryomov 已提交
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269
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;
}

1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
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);
}

1281 1282 1283 1284
/*
 * Returns whether a request should be blocked from being sent
 * based on the current osdmap and osd_client settings.
 */
1285 1286 1287 1288
static bool target_should_be_paused(struct ceph_osd_client *osdc,
				    const struct ceph_osd_request_target *t,
				    struct ceph_pg_pool_info *pi)
{
1289 1290 1291
	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) ||
1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315
		       __pool_full(pi);

	WARN_ON(pi->id != t->base_oloc.pool);
	return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
	       (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
}

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,
					   u32 *last_force_resend,
					   bool any_change)
{
	struct ceph_pg_pool_info *pi;
	struct ceph_pg pgid, last_pgid;
	struct ceph_osds up, acting;
	bool force_resend = false;
	bool need_check_tiering = false;
	bool need_resend = false;
1316
	bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407
	enum calc_target_result ct_res;
	int ret;

	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) {
		if (last_force_resend &&
		    *last_force_resend < pi->last_force_request_resend) {
			*last_force_resend = pi->last_force_request_resend;
			force_resend = true;
		} else if (!last_force_resend) {
			force_resend = true;
		}
	}
	if (ceph_oid_empty(&t->target_oid) || force_resend) {
		ceph_oid_copy(&t->target_oid, &t->base_oid);
		need_check_tiering = true;
	}
	if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
		ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
		need_check_tiering = true;
	}

	if (need_check_tiering &&
	    (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
		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;
	}

	ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
					&t->target_oloc, &pgid);
	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);

	ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
	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,
				 &last_pgid))
		force_resend = true;

	if (t->paused && !target_should_be_paused(osdc, t, pi)) {
		t->paused = false;
		need_resend = true;
	}

	if (ceph_pg_compare(&t->pgid, &pgid) ||
	    ceph_osds_changed(&t->acting, &acting, any_change) ||
	    force_resend) {
		t->pgid = pgid; /* struct */
		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;

		t->osd = acting.primary;
		need_resend = true;
	}

	ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
out:
	dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
	return ct_res;
}

1408 1409
static void setup_request_data(struct ceph_osd_request *req,
			       struct ceph_msg *msg)
S
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1410
{
1411 1412 1413 1414 1415
	u32 data_len = 0;
	int i;

	if (!list_empty(&msg->data))
		return;
S
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1416

1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433
	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;
1434 1435 1436 1437
		case CEPH_OSD_OP_NOTIFY_ACK:
			ceph_osdc_msg_data_add(msg,
					       &op->notify_ack.request_data);
			break;
1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460

		/* 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;

		/* 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;
1461 1462 1463 1464 1465 1466
		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;
1467 1468 1469 1470
		}

		data_len += op->indata_len;
	}
1471

1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501
	WARN_ON(data_len != msg->data_length);
}

static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
{
	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);

	ceph_encode_32(&p, 1); /* client_inc, always 1 */
	ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
	ceph_encode_32(&p, req->r_flags);
	ceph_encode_timespec(p, &req->r_mtime);
	p += sizeof(struct ceph_timespec);
	/* aka reassert_version */
	memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
	p += sizeof(req->r_replay_version);

	/* oloc */
1502 1503
	ceph_start_encoding(&p, 5, 4,
			    ceph_oloc_encoding_size(&req->r_t.target_oloc));
1504 1505 1506
	ceph_encode_64(&p, req->r_t.target_oloc.pool);
	ceph_encode_32(&p, -1); /* preferred */
	ceph_encode_32(&p, 0); /* key len */
1507 1508 1509 1510 1511
	if (req->r_t.target_oloc.pool_ns)
		ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str,
				   req->r_t.target_oloc.pool_ns->len);
	else
		ceph_encode_32(&p, 0);
1512 1513 1514

	/* pgid */
	ceph_encode_8(&p, 1);
1515 1516
	ceph_encode_64(&p, req->r_t.pgid.pool);
	ceph_encode_32(&p, req->r_t.pgid.seed);
1517
	ceph_encode_32(&p, -1); /* preferred */
1518

1519 1520 1521 1522
	/* oid */
	ceph_encode_32(&p, req->r_t.target_oid.name_len);
	memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
	p += req->r_t.target_oid.name_len;
S
Sage Weil 已提交
1523

1524 1525 1526 1527 1528 1529
	/* 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);
	}
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
	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 */

	BUG_ON(p > end);
	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
	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);
1555

1556 1557 1558
	dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__,
	     req, req->r_t.target_oid.name, req->r_t.target_oid.name_len,
	     msg->front.iov_len, data_len);
1559 1560 1561 1562 1563 1564 1565 1566 1567
}

/*
 * @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;

1568
	verify_osd_locked(osd);
1569 1570
	WARN_ON(osd->o_osd != req->r_t.osd);

1571 1572 1573 1574 1575 1576 1577
	/*
	 * 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);

1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	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);

	encode_request(req, req->r_request);

	dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
	     __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
	     req->r_t.osd, req->r_flags, req->r_attempts);

	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
1597 1598
}

I
Ilya Dryomov 已提交
1599 1600 1601 1602
static void maybe_request_map(struct ceph_osd_client *osdc)
{
	bool continuous = false;

1603
	verify_osdc_locked(osdc);
I
Ilya Dryomov 已提交
1604 1605
	WARN_ON(!osdc->osdmap->epoch);

1606 1607 1608
	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
1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
		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);
}

I
Ilya Dryomov 已提交
1620 1621
static void send_map_check(struct ceph_osd_request *req);

1622
static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
1623
{
1624 1625
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd *osd;
I
Ilya Dryomov 已提交
1626
	enum calc_target_result ct_res;
1627 1628
	bool need_send = false;
	bool promoted = false;
1629

1630 1631 1632 1633
	WARN_ON(req->r_tid || req->r_got_reply);
	dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);

again:
I
Ilya Dryomov 已提交
1634 1635 1636 1637
	ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
	if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
		goto promote;

1638 1639 1640 1641
	osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
	if (IS_ERR(osd)) {
		WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
		goto promote;
1642 1643
	}

1644
	if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
1645
	    ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
1646 1647 1648 1649
		dout("req %p pausewr\n", req);
		req->r_t.paused = true;
		maybe_request_map(osdc);
	} else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
1650
		   ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
1651 1652 1653 1654 1655 1656
		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)) &&
1657
		   (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
1658 1659 1660 1661 1662 1663 1664
		    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);
	} else if (!osd_homeless(osd)) {
		need_send = true;
1665
	} else {
1666
		maybe_request_map(osdc);
1667 1668
	}

1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680
	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);
	mutex_unlock(&osd->lock);

I
Ilya Dryomov 已提交
1681 1682 1683
	if (ct_res == CALC_TARGET_POOL_DNE)
		send_map_check(req);

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
	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)
{
	unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;

	if (req->r_flags & CEPH_OSD_FLAG_READ) {
		WARN_ON(req->r_flags & mask);
		req->r_flags |= CEPH_OSD_FLAG_ACK;
	} else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
		WARN_ON(!(req->r_flags & mask));
	else
		WARN_ON(1);

	WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
	atomic_inc(&req->r_osdc->num_requests);
}

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

static void __finish_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd *osd = req->r_osd;

	verify_osd_locked(osd);
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);

I
Ilya Dryomov 已提交
1727
	WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
	unlink_request(osd, req);
	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);
}

static void finish_request(struct ceph_osd_request *req)
{
	__finish_request(req);
	ceph_osdc_put_request(req);
1745 1746
}

1747 1748 1749 1750 1751 1752 1753 1754
static void __complete_request(struct ceph_osd_request *req)
{
	if (req->r_callback)
		req->r_callback(req);
	else
		complete_all(&req->r_completion);
}

I
Ilya Dryomov 已提交
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
/*
 * Note that this is open-coded in handle_reply(), which has to deal
 * with ack vs commit, dup acks, etc.
 */
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;
	__finish_request(req);
	__complete_request(req);
	complete_all(&req->r_safe_completion);
	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);
}

1786 1787 1788 1789
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
1790
	cancel_map_check(req);
1791 1792 1793
	finish_request(req);
}

I
Ilya Dryomov 已提交
1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875
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);
}

1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
/*
 * 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
1888
	WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
1889
	WARN_ON(!list_empty(&lreq->scan_item));
1890
	WARN_ON(!list_empty(&lreq->pending_lworks));
1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926
	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
1927
	RB_CLEAR_NODE(&lreq->mc_node);
1928
	INIT_LIST_HEAD(&lreq->scan_item);
1929
	INIT_LIST_HEAD(&lreq->pending_lworks);
1930
	init_completion(&lreq->reg_commit_wait);
1931
	init_completion(&lreq->notify_finish_wait);
1932 1933 1934 1935 1936 1937 1938 1939 1940 1941

	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
1942
DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 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 2032 2033 2034 2035 2036 2037

/*
 * 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;
2038 2039
	struct list_head pending_item;
	unsigned long queued_stamp;
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

	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);
2066
	INIT_LIST_HEAD(&lwork->pending_item);
2067 2068 2069 2070 2071 2072 2073 2074 2075
	lwork->lreq = linger_get(lreq);

	return lwork;
}

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

2076 2077 2078 2079
	mutex_lock(&lreq->lock);
	list_del(&lwork->pending_item);
	mutex_unlock(&lreq->lock);

2080 2081 2082 2083 2084 2085 2086 2087 2088 2089
	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);
2090 2091 2092 2093
	WARN_ON(!list_empty(&lwork->pending_item));

	lwork->queued_stamp = jiffies;
	list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106
	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;
	}

2107
	WARN_ON(!lreq->is_watch);
2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170
	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);
	WARN_ON(!__linger_registered(lreq));
	linger_reg_commit_complete(lreq, req->r_result);
	lreq->committed = true;

2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188
	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);
		}
	}

2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241
	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);
2242
	if (lreq->is_watch && lreq->committed) {
2243 2244 2245 2246 2247 2248 2249 2250
		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 {
2251 2252 2253 2254
		if (!lreq->is_watch)
			lreq->notify_id = 0;
		else
			WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274
		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) {
2275 2276 2277
		if (!req->r_result) {
			lreq->watch_valid_thru = lreq->ping_sent;
		} else if (!lreq->last_error) {
2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
			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];

2296
	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338
		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;

	calc_target(osdc, &lreq->t, &lreq->last_force_resend, false);
	osd = lookup_create_osd(osdc, lreq->t.osd, true);
	link_linger(osd, lreq);

	send_linger(lreq);
}

I
Ilya Dryomov 已提交
2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355
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);
}

2356 2357 2358 2359 2360
/*
 * @lreq has to be both registered and linked.
 */
static void __linger_cancel(struct ceph_osd_linger_request *lreq)
{
2361
	if (lreq->is_watch && lreq->ping_req->r_osd)
2362 2363 2364
		cancel_linger_request(lreq->ping_req);
	if (lreq->reg_req->r_osd)
		cancel_linger_request(lreq->reg_req);
I
Ilya Dryomov 已提交
2365
	cancel_linger_map_check(lreq);
2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379
	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
2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 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
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);
}

2463 2464 2465 2466 2467 2468 2469 2470 2471
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;
}

2472 2473 2474 2475 2476 2477 2478 2479 2480
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
2481
/*
2482 2483 2484 2485
 * 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
2486 2487 2488 2489 2490
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
2491
	struct ceph_options *opts = osdc->client->options;
2492 2493 2494
	unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
	LIST_HEAD(slow_osds);
	struct rb_node *n, *p;
S
Sage Weil 已提交
2495

2496 2497
	dout("%s osdc %p\n", __func__, osdc);
	down_write(&osdc->lock);
S
Sage Weil 已提交
2498

2499 2500 2501 2502 2503
	/*
	 * 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).
	 */
2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517
	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;

		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 (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;
			}
		}
2518 2519 2520 2521 2522 2523 2524 2525 2526
		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);
2527
			if (lreq->is_watch && lreq->committed && !lreq->last_error)
2528 2529 2530
				send_linger_ping(lreq);
			mutex_unlock(&lreq->lock);
		}
2531

2532 2533
		if (found)
			list_move_tail(&osd->o_keepalive_item, &slow_osds);
2534
	}
2535 2536 2537 2538

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

2539
	while (!list_empty(&slow_osds)) {
2540 2541 2542
		struct ceph_osd *osd = list_first_entry(&slow_osds,
							struct ceph_osd,
							o_keepalive_item);
2543
		list_del_init(&osd->o_keepalive_item);
S
Sage Weil 已提交
2544 2545 2546
		ceph_con_keepalive(&osd->o_con);
	}

2547
	up_write(&osdc->lock);
2548 2549
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
S
Sage Weil 已提交
2550 2551
}

2552 2553 2554 2555 2556
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);
2557
	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
2558
	struct ceph_osd *osd, *nosd;
2559

2560
	dout("%s osdc %p\n", __func__, osdc);
2561
	down_write(&osdc->lock);
2562 2563 2564 2565
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
		if (time_before(jiffies, osd->lru_ttl))
			break;

2566
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
2567
		WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
2568
		close_osd(osd);
2569
	}
2570

2571
	up_write(&osdc->lock);
2572 2573 2574 2575
	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

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
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) {
2611 2612
		bool changed = false;

2613 2614
		len = ceph_decode_32(p);
		if (len > 0) {
2615
			ceph_decode_need(p, end, len, e_inval);
2616 2617 2618
			if (!oloc->pool_ns ||
			    ceph_compare_string(oloc->pool_ns, *p, len))
				changed = true;
2619
			*p += len;
2620 2621 2622 2623 2624 2625 2626 2627
		} else {
			if (oloc->pool_ns)
				changed = true;
		}
		if (changed) {
			/* redirect changes namespace */
			pr_warn("ceph_object_locator::nspace is changed\n");
			goto e_inval;
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 2656 2657 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 2684 2685 2686 2687 2688 2689 2690 2691
		}
	}

	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;
}

2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704
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
2705

2706
static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
S
Sage Weil 已提交
2707
{
2708 2709 2710 2711
	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
2712
	u8 decode_redir;
2713 2714 2715
	u32 len;
	int ret;
	int i;
2716

2717 2718 2719
	ceph_decode_32_safe(&p, end, len, e_inval);
	ceph_decode_need(&p, end, len, e_inval);
	p += len; /* skip oid */
2720

2721 2722 2723
	ret = ceph_decode_pgid(&p, end, &m->pgid);
	if (ret)
		return ret;
2724

2725 2726 2727 2728 2729 2730
	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);
2731

2732 2733 2734
	ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
	if (m->num_ops > ARRAY_SIZE(m->outdata_len))
		goto e_inval;
2735

2736 2737 2738
	ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
			 e_inval);
	for (i = 0; i < m->num_ops; i++) {
2739 2740
		struct ceph_osd_op *op = p;

2741
		m->outdata_len[i] = le32_to_cpu(op->payload_len);
2742 2743 2744
		p += sizeof(*op);
	}

2745 2746 2747
	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
2748

2749 2750 2751 2752 2753 2754 2755 2756 2757
	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
2758

2759 2760 2761
	if (version >= 6) {
		if (version >= 7)
			ceph_decode_8_safe(&p, end, decode_redir, e_inval);
I
Ilya Dryomov 已提交
2762 2763 2764 2765 2766 2767 2768
		else
			decode_redir = 1;
	} else {
		decode_redir = 0;
	}

	if (decode_redir) {
2769 2770 2771
		ret = ceph_redirect_decode(&p, end, &m->redirect);
		if (ret)
			return ret;
2772
	} else {
2773
		ceph_oloc_init(&m->redirect.oloc);
2774
	}
S
Sage Weil 已提交
2775

2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793
	return 0;

e_inval:
	return -EINVAL;
}

/*
 * We are done with @req if
 *   - @m is a safe reply, or
 *   - @m is an unsafe reply and we didn't want a safe one
 */
static bool done_request(const struct ceph_osd_request *req,
			 const struct MOSDOpReply *m)
{
	return (m->result < 0 ||
		(m->flags & CEPH_OSD_FLAG_ONDISK) ||
		!(req->r_flags & CEPH_OSD_FLAG_ONDISK));
}
2794

2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 *
 * ->r_unsafe_callback is set?	yes			no
 *
 * first reply is OK (needed	r_cb/r_completion,	r_cb/r_completion,
 * any or needed/got safe)	r_safe_completion	r_safe_completion
 *
 * first reply is unsafe	r_unsafe_cb(true)	(nothing)
 *
 * when we get the safe reply	r_unsafe_cb(false),	r_cb/r_completion,
 *				r_safe_completion	r_safe_completion
 */
2809
static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
2810
{
2811
	struct ceph_osd_client *osdc = osd->o_osdc;
2812 2813 2814 2815 2816 2817 2818 2819 2820 2821
	struct ceph_osd_request *req;
	struct MOSDOpReply m;
	u64 tid = le64_to_cpu(msg->hdr.tid);
	u32 data_len = 0;
	bool already_acked;
	int ret;
	int i;

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

2822 2823 2824 2825 2826 2827 2828 2829 2830
	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);
2831
	if (!req) {
2832 2833
		dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
		goto out_unlock_session;
2834 2835
	}

2836
	m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
2837
	ret = decode_MOSDOpReply(msg, &m);
2838
	m.redirect.oloc.pool_ns = NULL;
2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854
	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);
2855
			goto out_unlock_session;
2856 2857 2858 2859 2860 2861 2862 2863
		}
	} 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);
2864 2865
		unlink_request(osd, req);
		mutex_unlock(&osd->lock);
2866

2867 2868 2869 2870 2871
		/*
		 * Not ceph_oloc_copy() - changing pool_ns is not
		 * supported.
		 */
		req->r_t.target_oloc.pool = m.redirect.oloc.pool;
2872 2873 2874 2875
		req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
		req->r_tid = 0;
		__submit_request(req, false);
		goto out_unlock_osdc;
2876 2877
	}

2878 2879 2880 2881
	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
2882
	}
2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904
	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;
	}
	dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
	     req, req->r_tid, req->r_got_reply, m.result, data_len);

	already_acked = req->r_got_reply;
	if (!already_acked) {
		req->r_result = m.result ?: data_len;
		req->r_replay_version = m.replay_version; /* struct */
		req->r_got_reply = true;
	} else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
		dout("req %p tid %llu dup ack\n", req, req->r_tid);
2905
		goto out_unlock_session;
2906 2907 2908
	}

	if (done_request(req, &m)) {
2909
		__finish_request(req);
2910 2911
		if (req->r_linger) {
			WARN_ON(req->r_unsafe_callback);
2912 2913
			dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
			__complete_request(req);
2914 2915
		}
	}
S
Sage Weil 已提交
2916

2917 2918
	mutex_unlock(&osd->lock);
	up_read(&osdc->lock);
S
Sage Weil 已提交
2919

2920 2921 2922
	if (done_request(req, &m)) {
		if (already_acked && req->r_unsafe_callback) {
			dout("req %p tid %llu safe-cb\n", req, req->r_tid);
2923
			req->r_unsafe_callback(req, false);
2924
		} else if (!req->r_linger) {
2925 2926 2927
			dout("req %p tid %llu cb\n", req, req->r_tid);
			__complete_request(req);
		}
2928 2929 2930
		if (m.flags & CEPH_OSD_FLAG_ONDISK)
			complete_all(&req->r_safe_completion);
		ceph_osdc_put_request(req);
2931 2932 2933 2934 2935 2936 2937
	} else {
		if (req->r_unsafe_callback) {
			dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
			req->r_unsafe_callback(req, true);
		} else {
			WARN_ON(1);
		}
2938
	}
S
Sage Weil 已提交
2939 2940 2941

	return;

2942
fail_request:
I
Ilya Dryomov 已提交
2943
	complete_request(req, -EIO);
2944 2945 2946 2947
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
S
Sage Weil 已提交
2948 2949
}

I
Ilya Dryomov 已提交
2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961
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);
	}
}

2962
static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
S
Sage Weil 已提交
2963
{
2964
	struct ceph_pg_pool_info *pi;
S
Sage Weil 已提交
2965

2966 2967 2968
	pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
	if (!pi)
		return false;
S
Sage Weil 已提交
2969

2970
	return pi->was_full && !__pool_full(pi);
2971 2972
}

2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992
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;

	ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true);
	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;
}

2993
/*
2994
 * Requeue requests whose mapping to an OSD has changed.
2995
 */
2996 2997 2998 2999 3000 3001
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)
3002
{
3003 3004 3005 3006
	struct ceph_osd_client *osdc = osd->o_osdc;
	struct rb_node *n;
	bool force_resend_writes;

3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
	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
3027
			cancel_linger_map_check(lreq);
3028 3029 3030 3031 3032 3033 3034 3035 3036
			/*
			 * 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:
I
Ilya Dryomov 已提交
3037
			check_linger_pool_dne(lreq);
3038 3039 3040 3041
			break;
		}
	}

3042 3043 3044 3045 3046
	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
3047
		n = rb_next(n); /* unlink_request(), check_pool_dne() */
3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063

		dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
		ct_res = calc_target(osdc, &req->r_t,
				     &req->r_last_force_resend, false);
		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
3064
			cancel_map_check(req);
3065 3066 3067 3068
			unlink_request(osd, req);
			insert_request(need_resend, req);
			break;
		case CALC_TARGET_POOL_DNE:
I
Ilya Dryomov 已提交
3069
			check_pool_dne(req);
3070
			break;
3071
		}
3072
	}
3073
}
3074

I
Ilya Dryomov 已提交
3075
static int handle_one_map(struct ceph_osd_client *osdc,
3076 3077 3078
			  void *p, void *end, bool incremental,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
I
Ilya Dryomov 已提交
3079 3080 3081 3082 3083 3084
{
	struct ceph_osdmap *newmap;
	struct rb_node *n;
	bool skipped_map = false;
	bool was_full;

3085
	was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
I
Ilya Dryomov 已提交
3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118 3119 3120 3121 3122
	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;
	}

3123
	was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139
	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
3140 3141 3142

	return 0;
}
3143

3144 3145 3146 3147
static void kick_requests(struct ceph_osd_client *osdc,
			  struct rb_root *need_resend,
			  struct list_head *need_resend_linger)
{
3148
	struct ceph_osd_linger_request *lreq, *nlreq;
3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165
	struct rb_node *n;

	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() */

		WARN_ON(req->r_osd);
		calc_target(osdc, &req->r_t, NULL, false);
		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);
3166 3167
		} else {
			cancel_linger_request(req);
3168 3169
		}
	}
3170 3171 3172 3173 3174 3175 3176

	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);
	}
3177 3178
}

S
Sage Weil 已提交
3179 3180 3181 3182 3183 3184 3185 3186 3187
/*
 * 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
3188 3189
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
S
Sage Weil 已提交
3190 3191 3192
	u32 nr_maps, maplen;
	u32 epoch;
	struct ceph_fsid fsid;
3193 3194
	struct rb_root need_resend = RB_ROOT;
	LIST_HEAD(need_resend_linger);
I
Ilya Dryomov 已提交
3195 3196 3197 3198
	bool handled_incremental = false;
	bool was_pauserd, was_pausewr;
	bool pauserd, pausewr;
	int err;
S
Sage Weil 已提交
3199

I
Ilya Dryomov 已提交
3200
	dout("%s have %u\n", __func__, osdc->osdmap->epoch);
3201
	down_write(&osdc->lock);
S
Sage Weil 已提交
3202 3203 3204 3205

	/* verify fsid */
	ceph_decode_need(&p, end, sizeof(fsid), bad);
	ceph_decode_copy(&p, &fsid, sizeof(fsid));
3206
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
I
Ilya Dryomov 已提交
3207
		goto bad;
S
Sage Weil 已提交
3208

3209 3210 3211
	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
3212
		      have_pool_full(osdc);
3213

S
Sage Weil 已提交
3214 3215 3216 3217 3218
	/* 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);
3219 3220
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3221
		ceph_decode_need(&p, end, maplen, bad);
I
Ilya Dryomov 已提交
3222 3223
		if (osdc->osdmap->epoch &&
		    osdc->osdmap->epoch + 1 == epoch) {
S
Sage Weil 已提交
3224 3225
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
3226 3227
			err = handle_one_map(osdc, p, p + maplen, true,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3228
			if (err)
S
Sage Weil 已提交
3229
				goto bad;
I
Ilya Dryomov 已提交
3230
			handled_incremental = true;
S
Sage Weil 已提交
3231 3232 3233 3234
		} else {
			dout("ignoring incremental map %u len %d\n",
			     epoch, maplen);
		}
I
Ilya Dryomov 已提交
3235
		p += maplen;
S
Sage Weil 已提交
3236 3237
		nr_maps--;
	}
I
Ilya Dryomov 已提交
3238
	if (handled_incremental)
S
Sage Weil 已提交
3239 3240 3241 3242 3243 3244 3245
		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);
3246 3247
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
3248 3249 3250 3251
		ceph_decode_need(&p, end, maplen, bad);
		if (nr_maps > 1) {
			dout("skipping non-latest full map %u len %d\n",
			     epoch, maplen);
3252
		} else if (osdc->osdmap->epoch >= epoch) {
S
Sage Weil 已提交
3253 3254 3255 3256 3257
			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);
3258 3259
			err = handle_one_map(osdc, p, p + maplen, false,
					     &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3260
			if (err)
S
Sage Weil 已提交
3261 3262 3263 3264 3265 3266 3267
				goto bad;
		}
		p += maplen;
		nr_maps--;
	}

done:
3268 3269 3270 3271 3272
	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
3273 3274 3275
	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
3276 3277 3278
		  have_pool_full(osdc);
	if (was_pauserd || was_pausewr || pauserd || pausewr)
		maybe_request_map(osdc);
3279

3280
	kick_requests(osdc, &need_resend, &need_resend_linger);
I
Ilya Dryomov 已提交
3281 3282 3283

	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			  osdc->osdmap->epoch);
3284
	up_write(&osdc->lock);
3285
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
3286 3287 3288 3289
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
3290
	ceph_msg_dump(msg);
3291 3292 3293 3294 3295 3296 3297 3298 3299 3300
	up_write(&osdc->lock);
}

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

3301
	for (n = rb_first(&osd->o_requests); n; ) {
3302 3303 3304
		struct ceph_osd_request *req =
		    rb_entry(n, struct ceph_osd_request, r_node);

3305 3306
		n = rb_next(n); /* cancel_linger_request() */

3307 3308 3309
		if (!req->r_linger) {
			if (!req->r_t.paused)
				send_request(req);
3310 3311
		} else {
			cancel_linger_request(req);
3312 3313
		}
	}
3314 3315 3316 3317 3318 3319
	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);
	}
3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336 3337 3338 3339 3340 3341 3342 3343
}

/*
 * 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
3344 3345
}

3346 3347 3348
/*
 * Process osd watch notifications
 */
3349 3350
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
3351
{
3352 3353 3354 3355 3356 3357 3358
	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;
3359
	s32 return_code = 0;
3360 3361
	void *payload = NULL;
	u32 payload_len = 0;
3362 3363 3364 3365

	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);
3366
	p += 8; /* skip ver */
3367 3368
	ceph_decode_64_safe(&p, end, notify_id, bad);

3369 3370 3371 3372 3373 3374 3375 3376
	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)
3377
		ceph_decode_32_safe(&p, end, return_code, bad);
3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390

	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);
3391 3392
	dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
	     opcode, cookie, lreq, lreq->is_watch);
3393 3394 3395 3396 3397
	if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
		if (!lreq->last_error) {
			lreq->last_error = -ENOTCONN;
			queue_watch_error(lreq);
		}
3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417 3418 3419 3420 3421 3422
	} 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);
		}
3423 3424 3425 3426 3427 3428
	} 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;
3429 3430
		}

3431 3432 3433 3434 3435 3436
		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);
3437
	}
3438

3439 3440 3441 3442
out_unlock_lreq:
	mutex_unlock(&lreq->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
3443 3444 3445 3446 3447 3448
	return;

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

3449 3450 3451 3452 3453 3454 3455
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
3456 3457 3458
	down_read(&osdc->lock);
	submit_request(req, false);
	up_read(&osdc->lock);
3459

3460
	return 0;
S
Sage Weil 已提交
3461
}
3462
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
3463

3464 3465 3466 3467 3468 3469 3470 3471 3472
/*
 * Unregister a registered request.  The request is not completed (i.e.
 * no callbacks or wakeups) - higher layers are supposed to know what
 * they are canceling.
 */
void ceph_osdc_cancel_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;

3473 3474 3475 3476
	down_write(&osdc->lock);
	if (req->r_osd)
		cancel_request(req);
	up_write(&osdc->lock);
3477 3478 3479
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);

S
Sage Weil 已提交
3480
/*
I
Ilya Dryomov 已提交
3481
 * @timeout: in jiffies, 0 means "wait forever"
S
Sage Weil 已提交
3482
 */
I
Ilya Dryomov 已提交
3483 3484
static int wait_request_timeout(struct ceph_osd_request *req,
				unsigned long timeout)
S
Sage Weil 已提交
3485
{
I
Ilya Dryomov 已提交
3486
	long left;
3487

I
Ilya Dryomov 已提交
3488
	dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
3489
	left = wait_for_completion_killable_timeout(&req->r_completion,
I
Ilya Dryomov 已提交
3490 3491 3492
						ceph_timeout_jiffies(timeout));
	if (left <= 0) {
		left = left ?: -ETIMEDOUT;
3493
		ceph_osdc_cancel_request(req);
3494 3495 3496

		/* kludge - need to to wake ceph_osdc_sync() */
		complete_all(&req->r_safe_completion);
I
Ilya Dryomov 已提交
3497 3498
	} else {
		left = req->r_result; /* completed */
S
Sage Weil 已提交
3499 3500
	}

I
Ilya Dryomov 已提交
3501 3502 3503 3504 3505 3506 3507 3508 3509 3510
	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
3511
}
3512
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
3513 3514 3515 3516 3517 3518

/*
 * sync - wait for all in-flight requests to flush.  avoid starvation.
 */
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
3519 3520
	struct rb_node *n, *p;
	u64 last_tid = atomic64_read(&osdc->last_tid);
S
Sage Weil 已提交
3521

3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536
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
3537

3538 3539 3540 3541 3542 3543 3544 3545 3546
			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);
			wait_for_completion(&req->r_safe_completion);
			ceph_osdc_put_request(req);
			goto again;
		}
S
Sage Weil 已提交
3547

3548
		mutex_unlock(&osd->lock);
S
Sage Weil 已提交
3549
	}
3550 3551 3552

	up_read(&osdc->lock);
	dout("%s done last_tid %llu\n", __func__, last_tid);
S
Sage Weil 已提交
3553
}
3554
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
3555

3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593
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);

3594
	lreq->is_watch = true;
3595 3596 3597
	lreq->wcb = wcb;
	lreq->errcb = errcb;
	lreq->data = data;
3598
	lreq->watch_valid_thru = jiffies;
3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 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 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749

	ceph_oid_copy(&lreq->t.base_oid, oid);
	ceph_oloc_copy(&lreq->t.base_oloc, oloc);
	lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
	lreq->mtime = CURRENT_TIME;

	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);
	req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
	req->r_mtime = CURRENT_TIME;
	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);

3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824 3825 3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855 3856 3857 3858 3859
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);

3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871 3872 3873 3874 3875 3876 3877 3878 3879 3880 3881 3882 3883 3884 3885 3886 3887 3888 3889 3890 3891 3892 3893
/*
 * 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;
}

3894 3895 3896 3897
/*
 * 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
3898
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
3899 3900 3901 3902 3903
{
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);

3904 3905 3906 3907 3908 3909 3910
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);
3911

S
Sage Weil 已提交
3912 3913 3914 3915 3916 3917 3918 3919 3920
/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
3921
	init_rwsem(&osdc->lock);
S
Sage Weil 已提交
3922
	osdc->osds = RB_ROOT;
3923
	INIT_LIST_HEAD(&osdc->osd_lru);
3924
	spin_lock_init(&osdc->osd_lru_lock);
3925 3926 3927
	osd_init(&osdc->homeless_osd);
	osdc->homeless_osd.o_osdc = osdc;
	osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
3928
	osdc->linger_requests = RB_ROOT;
I
Ilya Dryomov 已提交
3929 3930
	osdc->map_checks = RB_ROOT;
	osdc->linger_map_checks = RB_ROOT;
S
Sage Weil 已提交
3931
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
3932 3933
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);

3934
	err = -ENOMEM;
3935 3936 3937 3938
	osdc->osdmap = ceph_osdmap_alloc();
	if (!osdc->osdmap)
		goto out;

3939 3940
	osdc->req_mempool = mempool_create_slab_pool(10,
						     ceph_osd_request_cache);
S
Sage Weil 已提交
3941
	if (!osdc->req_mempool)
3942
		goto out_map;
S
Sage Weil 已提交
3943

3944
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
3945
				PAGE_SIZE, 10, true, "osd_op");
S
Sage Weil 已提交
3946
	if (err < 0)
3947
		goto out_mempool;
3948
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
3949
				PAGE_SIZE, 10, true, "osd_op_reply");
S
Sage Weil 已提交
3950 3951
	if (err < 0)
		goto out_msgpool;
3952

3953
	err = -ENOMEM;
3954
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
3955
	if (!osdc->notify_wq)
3956 3957
		goto out_msgpool_reply;

3958 3959
	schedule_delayed_work(&osdc->timeout_work,
			      osdc->client->options->osd_keepalive_timeout);
3960 3961 3962
	schedule_delayed_work(&osdc->osds_timeout_work,
	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));

S
Sage Weil 已提交
3963
	return 0;
3964

3965 3966
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
3967 3968
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
3969 3970
out_mempool:
	mempool_destroy(osdc->req_mempool);
3971 3972
out_map:
	ceph_osdmap_destroy(osdc->osdmap);
3973 3974
out:
	return err;
S
Sage Weil 已提交
3975 3976 3977 3978
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
3979 3980
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
3981
	cancel_delayed_work_sync(&osdc->timeout_work);
3982
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
3983

3984
	down_write(&osdc->lock);
3985 3986 3987
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
3988
		close_osd(osd);
3989
	}
3990 3991 3992 3993 3994
	up_write(&osdc->lock);
	WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
	osd_cleanup(&osdc->homeless_osd);

	WARN_ON(!list_empty(&osdc->osd_lru));
3995
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
I
Ilya Dryomov 已提交
3996 3997
	WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
	WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
3998 3999
	WARN_ON(atomic_read(&osdc->num_requests));
	WARN_ON(atomic_read(&osdc->num_homeless));
4000

4001
	ceph_osdmap_destroy(osdc->osdmap);
S
Sage Weil 已提交
4002 4003
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
4004
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
4005 4006 4007 4008 4009 4010 4011 4012 4013 4014
}

/*
 * 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,
4015
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
4016 4017 4018 4019 4020 4021
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
4022
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
S
Sage Weil 已提交
4023
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
4024
				    NULL, truncate_seq, truncate_size,
4025
				    false);
4026 4027
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
4028 4029

	/* it may be a short read due to an object boundary */
4030
	osd_req_op_extent_osd_data_pages(req, 0,
4031
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
4032

4033
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
4034
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
4035 4036 4037 4038 4039 4040 4041 4042 4043

	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;
}
4044
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
4045 4046 4047 4048 4049 4050 4051 4052 4053 4054

/*
 * 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,
4055
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
4056 4057 4058
{
	struct ceph_osd_request *req;
	int rc = 0;
4059
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
4060

4061
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
S
Sage Weil 已提交
4062
				    CEPH_OSD_OP_WRITE,
4063
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
4064
				    snapc, truncate_seq, truncate_size,
4065
				    true);
4066 4067
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
4068 4069

	/* it may be a short write due to an object boundary */
4070
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
4071 4072
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
4073

4074
	req->r_mtime = *mtime;
4075
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
4076 4077 4078 4079 4080 4081 4082 4083 4084
	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;
}
4085
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
4086

4087 4088
int ceph_osdc_setup(void)
{
4089 4090 4091
	size_t size = sizeof(struct ceph_osd_request) +
	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);

4092
	BUG_ON(ceph_osd_request_cache);
4093 4094
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
						   0, 0, NULL);
4095 4096 4097 4098 4099 4100 4101 4102 4103 4104 4105 4106 4107

	return ceph_osd_request_cache ? 0 : -ENOMEM;
}
EXPORT_SYMBOL(ceph_osdc_setup);

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

S
Sage Weil 已提交
4108 4109 4110 4111 4112 4113
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
4114
	struct ceph_osd_client *osdc = osd->o_osdc;
S
Sage Weil 已提交
4115 4116 4117 4118 4119 4120 4121
	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:
4122
		handle_reply(osd, msg);
S
Sage Weil 已提交
4123
		break;
4124 4125 4126
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
4127 4128 4129 4130 4131

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
4132

S
Sage Weil 已提交
4133 4134 4135
	ceph_msg_put(msg);
}

4136
/*
4137 4138 4139
 * 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.
4140 4141
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
4142 4143
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
4144 4145 4146
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
4147
	struct ceph_msg *m = NULL;
4148
	struct ceph_osd_request *req;
4149
	int front_len = le32_to_cpu(hdr->front_len);
4150
	int data_len = le32_to_cpu(hdr->data_len);
4151
	u64 tid = le64_to_cpu(hdr->tid);
S
Sage Weil 已提交
4152

4153 4154 4155 4156 4157 4158 4159 4160 4161 4162
	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);
4163
	if (!req) {
4164 4165
		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
		     osd->o_osd, tid);
4166
		*skip = 1;
4167
		goto out_unlock_session;
4168
	}
S
Sage Weil 已提交
4169

4170
	ceph_msg_revoke_incoming(req->r_reply);
4171

4172
	if (front_len > req->r_reply->front_alloc_len) {
4173 4174 4175
		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);
4176 4177
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
4178
		if (!m)
4179
			goto out_unlock_session;
S
Sage Weil 已提交
4180 4181 4182
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
4183

4184 4185 4186 4187 4188 4189
	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;
4190
		goto out_unlock_session;
4191
	}
4192 4193

	m = ceph_msg_get(req->r_reply);
S
Sage Weil 已提交
4194
	dout("get_reply tid %lld %p\n", tid, m);
4195

4196 4197 4198 4199
out_unlock_session:
	mutex_unlock(&osd->lock);
out_unlock_osdc:
	up_read(&osdc->lock);
4200
	return m;
4201 4202
}

4203 4204 4205 4206 4207 4208 4209 4210 4211 4212 4213 4214 4215 4216 4217 4218 4219 4220 4221 4222
/*
 * 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);
4223
		if (IS_ERR(pages)) {
4224 4225 4226 4227 4228 4229 4230 4231 4232 4233 4234 4235
			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;
}

4236 4237 4238 4239 4240 4241 4242
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
4243
	*skip = 0;
4244 4245
	switch (type) {
	case CEPH_MSG_OSD_MAP:
4246
	case CEPH_MSG_WATCH_NOTIFY:
4247
		return alloc_msg_with_page_vector(hdr);
4248 4249 4250
	case CEPH_MSG_OSD_OPREPLY:
		return get_reply(con, hdr, skip);
	default:
4251 4252
		pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
			osd->o_osd, type);
4253 4254 4255
		*skip = 1;
		return NULL;
	}
S
Sage Weil 已提交
4256 4257 4258 4259 4260 4261 4262 4263 4264 4265 4266 4267 4268 4269 4270 4271 4272 4273 4274
}

/*
 * 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);
}

4275 4276 4277
/*
 * authentication
 */
4278 4279 4280 4281 4282
/*
 * 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,
4283
					int *proto, int force_new)
4284 4285 4286 4287
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
4288
	struct ceph_auth_handshake *auth = &o->o_auth;
4289

4290
	if (force_new && auth->authorizer) {
4291
		ceph_auth_destroy_authorizer(auth->authorizer);
4292 4293
		auth->authorizer = NULL;
	}
4294 4295 4296
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
4297
		if (ret)
4298
			return ERR_PTR(ret);
4299 4300
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
4301 4302 4303
						     auth);
		if (ret)
			return ERR_PTR(ret);
4304 4305
	}
	*proto = ac->protocol;
4306

4307
	return auth;
4308 4309 4310 4311 4312 4313 4314 4315 4316
}


static int verify_authorizer_reply(struct ceph_connection *con, int len)
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;

4317
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
4318 4319
}

4320 4321 4322 4323 4324 4325
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;

4326
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
4327 4328
	return ceph_monc_validate_auth(&osdc->client->monc);
}
4329

4330
static int osd_sign_message(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
4331
{
4332
	struct ceph_osd *o = msg->con->private;
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4333
	struct ceph_auth_handshake *auth = &o->o_auth;
4334

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	return ceph_auth_sign_message(auth, msg);
}

4338
static int osd_check_message_signature(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
4339
{
4340
	struct ceph_osd *o = msg->con->private;
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4341
	struct ceph_auth_handshake *auth = &o->o_auth;
4342

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Yan, Zheng 已提交
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	return ceph_auth_check_message_signature(auth, msg);
}

4346
static const struct ceph_connection_operations osd_con_ops = {
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	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
4350 4351
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
4352
	.invalidate_authorizer = invalidate_authorizer,
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	.alloc_msg = alloc_msg,
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	.sign_message = osd_sign_message,
	.check_message_signature = osd_check_message_signature,
4356
	.fault = osd_fault,
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};