osd_client.c 66.4 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_OP_FRONT_LEN	4096
#define OSD_OPREPLY_FRONT_LEN	512
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static const struct ceph_connection_operations osd_con_ops;
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static void __send_queued(struct ceph_osd_client *osdc);
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static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
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static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req);
static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req);
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static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req);
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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.
 */

/*
 * 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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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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{
	BUG_ON(which >= osd_req->r_num_ops);

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	return &osd_req->r_ops[which].extent.osd_data;
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}
EXPORT_SYMBOL(osd_req_op_extent_osd_data);

struct ceph_osd_data *
osd_req_op_cls_request_info(struct ceph_osd_request *osd_req,
			unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

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	return &osd_req->r_ops[which].cls.request_info;
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}
EXPORT_SYMBOL(osd_req_op_cls_request_info);	/* ??? */

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struct ceph_osd_data *
osd_req_op_cls_request_data(struct ceph_osd_request *osd_req,
			unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

	return &osd_req->r_ops[which].cls.request_data;
}
EXPORT_SYMBOL(osd_req_op_cls_request_data);	/* ??? */

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struct ceph_osd_data *
osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
			unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

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	return &osd_req->r_ops[which].cls.response_data;
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}
EXPORT_SYMBOL(osd_req_op_cls_response_data);	/* ??? */

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_extent_osd_data(osd_req, which);
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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_extent_osd_data(osd_req, which);
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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_extent_osd_data(osd_req, which);
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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;

	osd_data = osd_req_op_cls_request_info(osd_req, which);
	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;

	osd_data = osd_req_op_cls_request_data(osd_req, which);
	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);

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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;

	osd_data = osd_req_op_cls_response_data(osd_req, which);
	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:
		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;
	default:
		break;
	}
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}

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/*
 * requests
 */
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void ceph_osdc_release_request(struct kref *kref)
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{
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	struct ceph_osd_request *req;
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	unsigned int which;
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	req = container_of(kref, struct ceph_osd_request, r_kref);
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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_revoke_incoming(req->r_reply);
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		ceph_msg_put(req->r_reply);
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	}
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	for (which = 0; which < req->r_num_ops; which++)
		osd_req_op_data_release(req, which);
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	ceph_put_snap_context(req->r_snapc);
	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
	else
		kfree(req);
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}
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EXPORT_SYMBOL(ceph_osdc_release_request);
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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;
	struct ceph_msg *msg;
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	size_t msg_size;

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	BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
	BUG_ON(num_ops > CEPH_OSD_MAX_OP);

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	msg_size = 4 + 4 + 8 + 8 + 4+8;
	msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
	msg_size += 1 + 8 + 4 + 4;     /* pg_t */
	msg_size += 4 + MAX_OBJ_NAME_SIZE;
	msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
	msg_size += 8;  /* snapid */
	msg_size += 8;  /* snap_seq */
	msg_size += 8 * (snapc ? snapc->num_snaps : 0);  /* snaps */
	msg_size += 4;
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	if (use_mempool) {
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		req = mempool_alloc(osdc->req_mempool, gfp_flags);
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		memset(req, 0, sizeof(*req));
	} else {
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		req = kzalloc(sizeof(*req), gfp_flags);
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	}
	if (req == NULL)
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		return NULL;
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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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	kref_init(&req->r_kref);
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	init_completion(&req->r_completion);
	init_completion(&req->r_safe_completion);
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	RB_CLEAR_NODE(&req->r_node);
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	INIT_LIST_HEAD(&req->r_unsafe_item);
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	INIT_LIST_HEAD(&req->r_linger_item);
	INIT_LIST_HEAD(&req->r_linger_osd);
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	INIT_LIST_HEAD(&req->r_req_lru_item);
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	INIT_LIST_HEAD(&req->r_osd_item);

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	/* create reply message */
	if (use_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
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				   OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
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	if (!msg) {
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		ceph_osdc_put_request(req);
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		return NULL;
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	}
	req->r_reply = msg;

	/* create request message; allow space for oid */
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	if (use_mempool)
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		msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
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	else
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		msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
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	if (!msg) {
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		ceph_osdc_put_request(req);
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		return NULL;
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	}
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	memset(msg->front.iov_base, 0, msg->front.iov_len);
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	req->r_request = msg;

	return req;
}
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EXPORT_SYMBOL(ceph_osdc_alloc_request);
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static bool osd_req_opcode_valid(u16 opcode)
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{
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	switch (opcode) {
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	case CEPH_OSD_OP_READ:
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	case CEPH_OSD_OP_STAT:
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	case CEPH_OSD_OP_MAPEXT:
	case CEPH_OSD_OP_MASKTRUNC:
	case CEPH_OSD_OP_SPARSE_READ:
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	case CEPH_OSD_OP_NOTIFY:
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	case CEPH_OSD_OP_NOTIFY_ACK:
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	case CEPH_OSD_OP_ASSERT_VER:
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	case CEPH_OSD_OP_WRITE:
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	case CEPH_OSD_OP_WRITEFULL:
	case CEPH_OSD_OP_TRUNCATE:
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_DELETE:
	case CEPH_OSD_OP_APPEND:
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	case CEPH_OSD_OP_STARTSYNC:
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	case CEPH_OSD_OP_SETTRUNC:
	case CEPH_OSD_OP_TRIMTRUNC:
	case CEPH_OSD_OP_TMAPUP:
	case CEPH_OSD_OP_TMAPPUT:
	case CEPH_OSD_OP_TMAPGET:
	case CEPH_OSD_OP_CREATE:
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	case CEPH_OSD_OP_ROLLBACK:
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	case CEPH_OSD_OP_WATCH:
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	case CEPH_OSD_OP_OMAPGETKEYS:
	case CEPH_OSD_OP_OMAPGETVALS:
	case CEPH_OSD_OP_OMAPGETHEADER:
	case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
	case CEPH_OSD_OP_OMAPSETVALS:
	case CEPH_OSD_OP_OMAPSETHEADER:
	case CEPH_OSD_OP_OMAPCLEAR:
	case CEPH_OSD_OP_OMAPRMKEYS:
	case CEPH_OSD_OP_OMAP_CMP:
	case CEPH_OSD_OP_CLONERANGE:
	case CEPH_OSD_OP_ASSERT_SRC_VERSION:
	case CEPH_OSD_OP_SRC_CMPXATTR:
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	case CEPH_OSD_OP_GETXATTR:
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	case CEPH_OSD_OP_GETXATTRS:
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	case CEPH_OSD_OP_CMPXATTR:
	case CEPH_OSD_OP_SETXATTR:
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	case CEPH_OSD_OP_SETXATTRS:
	case CEPH_OSD_OP_RESETXATTRS:
	case CEPH_OSD_OP_RMXATTR:
	case CEPH_OSD_OP_PULL:
	case CEPH_OSD_OP_PUSH:
	case CEPH_OSD_OP_BALANCEREADS:
	case CEPH_OSD_OP_UNBALANCEREADS:
	case CEPH_OSD_OP_SCRUB:
	case CEPH_OSD_OP_SCRUB_RESERVE:
	case CEPH_OSD_OP_SCRUB_UNRESERVE:
	case CEPH_OSD_OP_SCRUB_STOP:
	case CEPH_OSD_OP_SCRUB_MAP:
	case CEPH_OSD_OP_WRLOCK:
	case CEPH_OSD_OP_WRUNLOCK:
	case CEPH_OSD_OP_RDLOCK:
	case CEPH_OSD_OP_RDUNLOCK:
	case CEPH_OSD_OP_UPLOCK:
	case CEPH_OSD_OP_DNLOCK:
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	case CEPH_OSD_OP_CALL:
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	case CEPH_OSD_OP_PGLS:
	case CEPH_OSD_OP_PGLS_FILTER:
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		return true;
	default:
		return false;
	}
}

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/*
 * 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.
 */
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static struct ceph_osd_req_op *
osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
				u16 opcode)
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{
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	struct ceph_osd_req_op *op;

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

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	op = &osd_req->r_ops[which];
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	memset(op, 0, sizeof (*op));
	op->op = opcode;
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	return op;
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}

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void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
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				u64 offset, u64 length,
				u64 truncate_size, u32 truncate_seq)
{
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	struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
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	size_t payload_len = 0;

	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
	if (opcode == CEPH_OSD_OP_WRITE)
		payload_len += length;

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_extent_init);

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void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
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{
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	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;
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	if (length == previous)
		return;		/* Nothing to do */
	BUG_ON(length > previous);

	op->extent.length = length;
	op->payload_len -= previous - length;
}
EXPORT_SYMBOL(osd_req_op_extent_update);

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void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
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			u16 opcode, const char *class, const char *method)
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{
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	struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
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	struct ceph_pagelist *pagelist;
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	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

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	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

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	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
531
	ceph_pagelist_append(pagelist, class, size);
532 533 534 535 536 537
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
538
	ceph_pagelist_append(pagelist, method, size);
539 540
	payload_len += size;

541
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
542

543 544 545 546 547
	op->cls.argc = 0;	/* currently unused */

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
548

549 550
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
551 552
				u64 cookie, u64 version, int flag)
{
553
	struct ceph_osd_req_op *op = osd_req_op_init(osd_req, which, opcode);
554

555
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
556 557 558 559 560

	op->watch.cookie = cookie;
	/* op->watch.ver = version; */	/* XXX 3847 */
	op->watch.ver = cpu_to_le64(version);
	if (opcode == CEPH_OSD_OP_WATCH && flag)
561
		op->watch.flag = (u8)1;
562 563 564
}
EXPORT_SYMBOL(osd_req_op_watch_init);

565
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
566 567 568 569 570 571 572
				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)
573
			ceph_msg_data_add_pages(msg, osd_data->pages,
574 575 576
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
577
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
578 579
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
580
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
581 582 583 584 585 586
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

587
static u64 osd_req_encode_op(struct ceph_osd_request *req,
588
			      struct ceph_osd_op *dst, unsigned int which)
589
{
590
	struct ceph_osd_req_op *src;
591
	struct ceph_osd_data *osd_data;
592
	u64 request_data_len = 0;
593
	u64 data_length;
594

595 596
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
597 598 599 600 601 602 603 604 605 606 607 608
	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:
		if (src->op == CEPH_OSD_OP_WRITE)
609
			request_data_len = src->extent.length;
610 611 612 613 614 615
		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);
616
		osd_data = &src->extent.osd_data;
617
		if (src->op == CEPH_OSD_OP_WRITE)
618
			ceph_osdc_msg_data_add(req->r_request, osd_data);
619
		else
620
			ceph_osdc_msg_data_add(req->r_reply, osd_data);
621 622 623 624
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640
		osd_data = &src->cls.request_info;
		ceph_osdc_msg_data_add(req->r_request, osd_data);
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
		request_data_len = osd_data->pagelist->length;

		osd_data = &src->cls.request_data;
		data_length = ceph_osd_data_length(osd_data);
		if (data_length) {
			BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
			dst->cls.indata_len = cpu_to_le32(data_length);
			ceph_osdc_msg_data_add(req->r_request, osd_data);
			src->payload_len += data_length;
			request_data_len += data_length;
		}
		osd_data = &src->cls.response_data;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
641 642 643 644 645 646 647 648 649 650
		break;
	case CEPH_OSD_OP_STARTSYNC:
		break;
	case CEPH_OSD_OP_NOTIFY_ACK:
	case CEPH_OSD_OP_WATCH:
		dst->watch.cookie = cpu_to_le64(src->watch.cookie);
		dst->watch.ver = cpu_to_le64(src->watch.ver);
		dst->watch.flag = src->watch.flag;
		break;
	default:
651
		pr_err("unsupported osd opcode %s\n",
652
			ceph_osd_op_name(src->op));
653
		WARN_ON(1);
654 655

		return 0;
656
	}
657
	dst->op = cpu_to_le16(src->op);
658
	dst->payload_len = cpu_to_le32(src->payload_len);
659

660
	return request_data_len;
661 662
}

663 664 665 666 667 668 669 670 671 672 673 674 675 676
/*
 * 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,
677
					       u64 off, u64 *plen, int num_ops,
678 679 680 681
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
682
					       bool use_mempool)
683
{
684
	struct ceph_osd_request *req;
685 686 687
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
688 689
	u32 object_size;
	u64 object_base;
690
	int r;
691

692
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
693

694
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
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					GFP_NOFS);
696
	if (!req)
697
		return ERR_PTR(-ENOMEM);
698

699
	req->r_flags = flags;
700 701

	/* calculate max write size */
702
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
703 704
	if (r < 0) {
		ceph_osdc_put_request(req);
705
		return ERR_PTR(r);
706
	}
707

708 709 710 711 712 713 714 715
	object_size = le32_to_cpu(layout->fl_object_size);
	object_base = off - objoff;
	if (truncate_size <= object_base) {
		truncate_size = 0;
	} else {
		truncate_size -= object_base;
		if (truncate_size > object_size)
			truncate_size = object_size;
716
	}
717

718
	osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
719
				truncate_size, truncate_seq);
720

721 722 723 724 725 726
	/*
	 * A second op in the ops array means the caller wants to
	 * also issue a include a 'startsync' command so that the
	 * osd will flush data quickly.
	 */
	if (num_ops > 1)
727
		osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
728

729 730
	req->r_file_layout = *layout;  /* keep a copy */

731 732
	snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
		vino.ino, objnum);
733 734
	req->r_oid_len = strlen(req->r_oid);

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	return req;
}
737
EXPORT_SYMBOL(ceph_osdc_new_request);
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/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
static void __insert_request(struct ceph_osd_client *osdc,
			     struct ceph_osd_request *new)
{
	struct rb_node **p = &osdc->requests.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_request *req = NULL;

	while (*p) {
		parent = *p;
		req = rb_entry(parent, struct ceph_osd_request, r_node);
		if (new->r_tid < req->r_tid)
			p = &(*p)->rb_left;
		else if (new->r_tid > req->r_tid)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->r_node, parent, p);
	rb_insert_color(&new->r_node, &osdc->requests);
}

static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
						 u64 tid)
{
	struct ceph_osd_request *req;
	struct rb_node *n = osdc->requests.rb_node;

	while (n) {
		req = rb_entry(n, struct ceph_osd_request, r_node);
		if (tid < req->r_tid)
			n = n->rb_left;
		else if (tid > req->r_tid)
			n = n->rb_right;
		else
			return req;
	}
	return NULL;
}

static struct ceph_osd_request *
__lookup_request_ge(struct ceph_osd_client *osdc,
		    u64 tid)
{
	struct ceph_osd_request *req;
	struct rb_node *n = osdc->requests.rb_node;

	while (n) {
		req = rb_entry(n, struct ceph_osd_request, r_node);
		if (tid < req->r_tid) {
			if (!n->rb_left)
				return req;
			n = n->rb_left;
		} else if (tid > req->r_tid) {
			n = n->rb_right;
		} else {
			return req;
		}
	}
	return NULL;
}

804 805 806 807 808 809
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
810
	struct ceph_osd_request *req, *nreq;
811
	LIST_HEAD(resend);
812 813 814 815
	int err;

	dout("__kick_osd_requests osd%d\n", osd->o_osd);
	err = __reset_osd(osdc, osd);
816
	if (err)
817
		return;
818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
	/*
	 * Build up a list of requests to resend by traversing the
	 * osd's list of requests.  Requests for a given object are
	 * sent in tid order, and that is also the order they're
	 * kept on this list.  Therefore all requests that are in
	 * flight will be found first, followed by all requests that
	 * have not yet been sent.  And to resend requests while
	 * preserving this order we will want to put any sent
	 * requests back on the front of the osd client's unsent
	 * list.
	 *
	 * So we build a separate ordered list of already-sent
	 * requests for the affected osd and splice it onto the
	 * front of the osd client's unsent list.  Once we've seen a
	 * request that has not yet been sent we're done.  Those
	 * requests are already sitting right where they belong.
	 */
835
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
836 837 838 839
		if (!req->r_sent)
			break;
		list_move_tail(&req->r_req_lru_item, &resend);
		dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
840
		     osd->o_osd);
841 842 843
		if (!req->r_linger)
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
	}
844
	list_splice(&resend, &osdc->req_unsent);
845

846 847 848 849 850
	/*
	 * Linger requests are re-registered before sending, which
	 * sets up a new tid for each.  We add them to the unsent
	 * list at the end to keep things in tid order.
	 */
851 852
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
				 r_linger_osd) {
853 854 855 856 857
		/*
		 * reregister request prior to unregistering linger so
		 * that r_osd is preserved.
		 */
		BUG_ON(!list_empty(&req->r_req_lru_item));
858
		__register_request(osdc, req);
859
		list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
860
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
861
		__unregister_linger_request(osdc, req);
862 863
		dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
		     osd->o_osd);
864 865 866
	}
}

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/*
868
 * If the osd connection drops, we need to resubmit all requests.
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 */
static void osd_reset(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc;

	if (!osd)
		return;
	dout("osd_reset osd%d\n", osd->o_osd);
	osdc = osd->o_osdc;
	down_read(&osdc->map_sem);
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	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
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	__send_queued(osdc);
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	mutex_unlock(&osdc->request_mutex);
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	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
890
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
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{
	struct ceph_osd *osd;

	osd = kzalloc(sizeof(*osd), GFP_NOFS);
	if (!osd)
		return NULL;

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
900
	osd->o_osd = onum;
901
	RB_CLEAR_NODE(&osd->o_node);
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902
	INIT_LIST_HEAD(&osd->o_requests);
903
	INIT_LIST_HEAD(&osd->o_linger_requests);
904
	INIT_LIST_HEAD(&osd->o_osd_lru);
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	osd->o_incarnation = 1;

907
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
908

909
	INIT_LIST_HEAD(&osd->o_keepalive_item);
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	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);
929
	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
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		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

932
		ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
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		kfree(osd);
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	}
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}

/*
 * remove an osd from our map
 */
940
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
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{
942
	dout("__remove_osd %p\n", osd);
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	BUG_ON(!list_empty(&osd->o_requests));
	rb_erase(&osd->o_node, &osdc->osds);
945
	list_del_init(&osd->o_osd_lru);
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	ceph_con_close(&osd->o_con);
	put_osd(osd);
}

950 951
static void remove_all_osds(struct ceph_osd_client *osdc)
{
952
	dout("%s %p\n", __func__, osdc);
953 954 955 956 957 958 959 960 961
	mutex_lock(&osdc->request_mutex);
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

962 963 964 965 966 967
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
			      struct ceph_osd *osd)
{
	dout("__move_osd_to_lru %p\n", osd);
	BUG_ON(!list_empty(&osd->o_osd_lru));
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
968
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
969 970 971 972 973 974 975 976 977
}

static void __remove_osd_from_lru(struct ceph_osd *osd)
{
	dout("__remove_osd_from_lru %p\n", osd);
	if (!list_empty(&osd->o_osd_lru))
		list_del_init(&osd->o_osd_lru);
}

978
static void remove_old_osds(struct ceph_osd_client *osdc)
979 980 981 982 983 984
{
	struct ceph_osd *osd, *nosd;

	dout("__remove_old_osds %p\n", osdc);
	mutex_lock(&osdc->request_mutex);
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
985
		if (time_before(jiffies, osd->lru_ttl))
986 987 988 989 990 991
			break;
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

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/*
 * reset osd connect
 */
995
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
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996
{
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997
	struct ceph_entity_addr *peer_addr;
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999
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1000 1001
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1002
		__remove_osd(osdc, osd);
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		return -ENODEV;
	}

	peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
	if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
			!ceph_con_opened(&osd->o_con)) {
		struct ceph_osd_request *req;

1012 1013 1014 1015 1016
		dout(" osd addr hasn't changed and connection never opened,"
		     " letting msgr retry");
		/* touch each r_stamp for handle_timeout()'s benfit */
		list_for_each_entry(req, &osd->o_requests, r_osd_item)
			req->r_stamp = jiffies;
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		return -EAGAIN;
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	}
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	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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}

static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
{
	struct rb_node **p = &osdc->osds.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd *osd = NULL;

1034
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
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	while (*p) {
		parent = *p;
		osd = rb_entry(parent, struct ceph_osd, o_node);
		if (new->o_osd < osd->o_osd)
			p = &(*p)->rb_left;
		else if (new->o_osd > osd->o_osd)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->o_node, parent, p);
	rb_insert_color(&new->o_node, &osdc->osds);
}

static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
{
	struct ceph_osd *osd;
	struct rb_node *n = osdc->osds.rb_node;

	while (n) {
		osd = rb_entry(n, struct ceph_osd, o_node);
		if (o < osd->o_osd)
			n = n->rb_left;
		else if (o > osd->o_osd)
			n = n->rb_right;
		else
			return osd;
	}
	return NULL;
}

1067 1068 1069
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1070
			osdc->client->options->osd_keepalive_timeout * HZ);
1071 1072 1073 1074 1075 1076
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
Sage Weil 已提交
1077 1078 1079 1080 1081

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1082 1083
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1084 1085
{
	req->r_tid = ++osdc->last_tid;
1086
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1087
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
Sage Weil 已提交
1088 1089 1090 1091
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1092 1093
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1094
	}
1095 1096
}

S
Sage Weil 已提交
1097 1098 1099 1100 1101 1102
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1103 1104 1105 1106 1107 1108
	if (RB_EMPTY_NODE(&req->r_node)) {
		dout("__unregister_request %p tid %lld not registered\n",
			req, req->r_tid);
		return;
	}

S
Sage Weil 已提交
1109 1110 1111 1112
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
	osdc->num_requests--;

1113 1114
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1115
		ceph_msg_revoke(req->r_request);
1116 1117

		list_del_init(&req->r_osd_item);
1118 1119 1120
		if (list_empty(&req->r_osd->o_requests) &&
		    list_empty(&req->r_osd->o_linger_requests)) {
			dout("moving osd to %p lru\n", req->r_osd);
1121
			__move_osd_to_lru(osdc, req->r_osd);
1122
		}
1123
		if (list_empty(&req->r_linger_item))
1124
			req->r_osd = NULL;
1125
	}
S
Sage Weil 已提交
1126

A
Alex Elder 已提交
1127
	list_del_init(&req->r_req_lru_item);
S
Sage Weil 已提交
1128 1129
	ceph_osdc_put_request(req);

1130 1131 1132
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1133 1134 1135 1136 1137 1138 1139 1140
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1141
	if (req->r_sent && req->r_osd) {
1142
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1143 1144 1145 1146
		req->r_sent = 0;
	}
}

1147 1148 1149 1150 1151
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
	dout("__register_linger_request %p\n", req);
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1152 1153 1154
	if (req->r_osd)
		list_add_tail(&req->r_linger_osd,
			      &req->r_osd->o_linger_requests);
1155 1156 1157 1158 1159 1160
}

static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req)
{
	dout("__unregister_linger_request %p\n", req);
A
Alex Elder 已提交
1161
	list_del_init(&req->r_linger_item);
1162 1163 1164 1165 1166 1167 1168 1169
	if (req->r_osd) {
		list_del_init(&req->r_linger_osd);

		if (list_empty(&req->r_osd->o_requests) &&
		    list_empty(&req->r_osd->o_linger_requests)) {
			dout("moving osd to %p lru\n", req->r_osd);
			__move_osd_to_lru(osdc, req->r_osd);
		}
1170 1171
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201
	}
}

void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
					 struct ceph_osd_request *req)
{
	mutex_lock(&osdc->request_mutex);
	if (req->r_linger) {
		__unregister_linger_request(osdc, req);
		ceph_osdc_put_request(req);
	}
	mutex_unlock(&osdc->request_mutex);
}
EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);

void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
				  struct ceph_osd_request *req)
{
	if (!req->r_linger) {
		dout("set_request_linger %p\n", req);
		req->r_linger = 1;
		/*
		 * caller is now responsible for calling
		 * unregister_linger_request
		 */
		ceph_osdc_get_request(req);
	}
}
EXPORT_SYMBOL(ceph_osdc_set_request_linger);

S
Sage Weil 已提交
1202 1203 1204
/*
 * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
 * (as needed), and set the request r_osd appropriately.  If there is
L
Lucas De Marchi 已提交
1205
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1206
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1207 1208 1209 1210 1211
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1212
static int __map_request(struct ceph_osd_client *osdc,
1213
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1214
{
1215
	struct ceph_pg pgid;
1216 1217
	int acting[CEPH_PG_MAX_SIZE];
	int o = -1, num = 0;
S
Sage Weil 已提交
1218 1219
	int err;

1220
	dout("map_request %p tid %lld\n", req, req->r_tid);
1221 1222
	err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
				ceph_file_layout_pg_pool(req->r_file_layout));
1223 1224
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1225
		return err;
1226
	}
1227 1228
	req->r_pgid = pgid;

1229 1230 1231 1232 1233
	err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
	if (err > 0) {
		o = acting[0];
		num = err;
	}
S
Sage Weil 已提交
1234

1235 1236
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1237 1238 1239
	     req->r_sent >= req->r_osd->o_incarnation &&
	     req->r_num_pg_osds == num &&
	     memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
S
Sage Weil 已提交
1240 1241 1242
	    (req->r_osd == NULL && o == -1))
		return 0;  /* no change */

1243 1244
	dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
	     req->r_tid, pgid.pool, pgid.seed, o,
S
Sage Weil 已提交
1245 1246
	     req->r_osd ? req->r_osd->o_osd : -1);

1247 1248 1249 1250
	/* record full pg acting set */
	memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
	req->r_num_pg_osds = num;

S
Sage Weil 已提交
1251 1252 1253 1254 1255 1256 1257 1258
	if (req->r_osd) {
		__cancel_request(req);
		list_del_init(&req->r_osd_item);
		req->r_osd = NULL;
	}

	req->r_osd = __lookup_osd(osdc, o);
	if (!req->r_osd && o >= 0) {
1259
		err = -ENOMEM;
1260
		req->r_osd = create_osd(osdc, o);
1261 1262
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1263
			goto out;
1264
		}
S
Sage Weil 已提交
1265

1266
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1267 1268
		__insert_osd(osdc, req->r_osd);

1269 1270 1271
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1272 1273
	}

1274 1275
	if (req->r_osd) {
		__remove_osd_from_lru(req->r_osd);
1276 1277
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
		list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1278
	} else {
1279
		list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1280
	}
1281
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1282 1283 1284 1285 1286 1287 1288 1289

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1290 1291
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1292
{
1293
	void *p;
S
Sage Weil 已提交
1294

1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
	dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
	     req, req->r_tid, req->r_osd->o_osd, req->r_flags,
	     (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);

	/* fill in message content that changes each time we send it */
	put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
	put_unaligned_le32(req->r_flags, req->r_request_flags);
	put_unaligned_le64(req->r_pgid.pool, req->r_request_pool);
	p = req->r_request_pgid;
	ceph_encode_64(&p, req->r_pgid.pool);
	ceph_encode_32(&p, req->r_pgid.seed);
	put_unaligned_le64(1, req->r_request_attempts);  /* FIXME */
	memcpy(req->r_request_reassert_version, &req->r_reassert_version,
	       sizeof(req->r_reassert_version));
1309

S
Sage Weil 已提交
1310
	req->r_stamp = jiffies;
1311
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1312 1313

	ceph_msg_get(req->r_request); /* send consumes a ref */
1314 1315 1316 1317 1318

	/* Mark the request unsafe if this is the first timet's being sent. */

	if (!req->r_sent && req->r_unsafe_callback)
		req->r_unsafe_callback(req, true);
S
Sage Weil 已提交
1319
	req->r_sent = req->r_osd->o_incarnation;
1320 1321

	ceph_con_send(&req->r_osd->o_con, req->r_request);
S
Sage Weil 已提交
1322 1323
}

1324 1325 1326
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1327
static void __send_queued(struct ceph_osd_client *osdc)
1328 1329 1330
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1331 1332
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1333 1334 1335
		__send_request(osdc, req);
}

S
Sage Weil 已提交
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
/*
 * Timeout callback, called every N seconds when 1 or more osd
 * requests has been active for more than N seconds.  When this
 * happens, we ping all OSDs with requests who have timed out to
 * ensure any communications channel reset is detected.  Reset the
 * request timeouts another N seconds in the future as we go.
 * Reschedule the timeout event another N seconds in future (unless
 * there are no open requests).
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
S
Sage Weil 已提交
1349
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1350
	struct ceph_osd *osd;
1351
	unsigned long keepalive =
1352
		osdc->client->options->osd_keepalive_timeout * HZ;
1353
	struct list_head slow_osds;
S
Sage Weil 已提交
1354 1355 1356 1357 1358 1359 1360
	dout("timeout\n");
	down_read(&osdc->map_sem);

	ceph_monc_request_next_osdmap(&osdc->client->monc);

	mutex_lock(&osdc->request_mutex);

1361 1362 1363 1364 1365 1366 1367
	/*
	 * 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).
	 */
	INIT_LIST_HEAD(&slow_osds);
	list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
S
Sage Weil 已提交
1368
		if (time_before(jiffies, req->r_stamp + keepalive))
1369 1370 1371 1372 1373
			break;

		osd = req->r_osd;
		BUG_ON(!osd);
		dout(" tid %llu is slow, will send keepalive on osd%d\n",
S
Sage Weil 已提交
1374
		     req->r_tid, osd->o_osd);
1375 1376 1377 1378 1379 1380
		list_move_tail(&osd->o_keepalive_item, &slow_osds);
	}
	while (!list_empty(&slow_osds)) {
		osd = list_entry(slow_osds.next, struct ceph_osd,
				 o_keepalive_item);
		list_del_init(&osd->o_keepalive_item);
S
Sage Weil 已提交
1381 1382 1383
		ceph_con_keepalive(&osd->o_con);
	}

1384
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1385
	__send_queued(osdc);
S
Sage Weil 已提交
1386 1387 1388 1389
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1390 1391 1392 1393 1394 1395
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);
	unsigned long delay =
1396
		osdc->client->options->osd_idle_ttl * HZ >> 2;
1397 1398 1399

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1400
	remove_old_osds(osdc);
1401 1402 1403 1404 1405 1406
	up_read(&osdc->map_sem);

	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

S
Sage Weil 已提交
1407 1408
static void complete_request(struct ceph_osd_request *req)
{
1409 1410
	if (req->r_unsafe_callback)
		req->r_unsafe_callback(req, false);
S
Sage Weil 已提交
1411 1412 1413
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1414 1415 1416 1417
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1418 1419
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
			 struct ceph_connection *con)
S
Sage Weil 已提交
1420
{
1421
	void *p, *end;
S
Sage Weil 已提交
1422 1423
	struct ceph_osd_request *req;
	u64 tid;
1424
	int object_len;
1425 1426
	unsigned int numops;
	int payload_len, flags;
1427
	s32 result;
1428 1429 1430 1431 1432 1433
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1434
	int already_completed;
1435
	u32 bytes;
1436
	unsigned int i;
S
Sage Weil 已提交
1437

1438
	tid = le64_to_cpu(msg->hdr.tid);
1439 1440 1441 1442 1443 1444 1445 1446 1447 1448
	dout("handle_reply %p tid %llu\n", msg, tid);

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

	ceph_decode_need(&p, end, 4, bad);
	object_len = ceph_decode_32(&p);
	ceph_decode_need(&p, end, object_len, bad);
	p += object_len;

1449
	err = ceph_decode_pgid(&p, end, &pg);
1450
	if (err)
S
Sage Weil 已提交
1451
		goto bad;
1452 1453 1454 1455 1456 1457 1458 1459

	ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
	flags = ceph_decode_64(&p);
	result = ceph_decode_32(&p);
	reassert_epoch = ceph_decode_32(&p);
	reassert_version = ceph_decode_64(&p);
	osdmap_epoch = ceph_decode_32(&p);

S
Sage Weil 已提交
1460 1461 1462 1463 1464
	/* lookup */
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1465
		goto bad_mutex;
S
Sage Weil 已提交
1466 1467
	}
	ceph_osdc_get_request(req);
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489

	dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
	     req, result);

	ceph_decode_need(&p, end, 4, bad);
	numops = ceph_decode_32(&p);
	if (numops > CEPH_OSD_MAX_OP)
		goto bad_put;
	if (numops != req->r_num_ops)
		goto bad_put;
	payload_len = 0;
	ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad);
	for (i = 0; i < numops; i++) {
		struct ceph_osd_op *op = p;
		int len;

		len = le32_to_cpu(op->payload_len);
		req->r_reply_op_len[i] = len;
		dout(" op %d has %d bytes\n", i, len);
		payload_len += len;
		p += sizeof(*op);
	}
1490 1491
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1492
		pr_warning("sum of op payload lens %d != data_len %d",
1493
			   payload_len, bytes);
1494 1495 1496 1497 1498 1499 1500
		goto bad_put;
	}

	ceph_decode_need(&p, end, 4 + numops * 4, bad);
	retry_attempt = ceph_decode_32(&p);
	for (i = 0; i < numops; i++)
		req->r_reply_op_result[i] = ceph_decode_32(&p);
S
Sage Weil 已提交
1501 1502 1503

	if (!req->r_got_reply) {

1504
		req->r_result = result;
S
Sage Weil 已提交
1505 1506 1507 1508 1509 1510
		dout("handle_reply result %d bytes %d\n", req->r_result,
		     bytes);
		if (req->r_result == 0)
			req->r_result = bytes;

		/* in case this is a write and we need to replay, */
1511 1512
		req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
		req->r_reassert_version.version = cpu_to_le64(reassert_version);
S
Sage Weil 已提交
1513 1514 1515 1516

		req->r_got_reply = 1;
	} else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
		dout("handle_reply tid %llu dup ack\n", tid);
S
Sage Weil 已提交
1517
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1518 1519 1520 1521 1522
		goto done;
	}

	dout("handle_reply tid %llu flags %d\n", tid, flags);

1523 1524 1525
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1526
	/* either this is a read, or we got the safe response */
1527 1528
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1529 1530 1531
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

1532 1533
	already_completed = req->r_completed;
	req->r_completed = 1;
S
Sage Weil 已提交
1534
	mutex_unlock(&osdc->request_mutex);
1535 1536
	if (already_completed)
		goto done;
S
Sage Weil 已提交
1537 1538 1539 1540

	if (req->r_callback)
		req->r_callback(req, msg);
	else
1541
		complete_all(&req->r_completion);
S
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1542

S
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1543 1544
	if (flags & CEPH_OSD_FLAG_ONDISK)
		complete_request(req);
S
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1545 1546

done:
1547
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
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1548 1549 1550
	ceph_osdc_put_request(req);
	return;

1551 1552
bad_put:
	ceph_osdc_put_request(req);
1553 1554
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
S
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1555
bad:
1556 1557
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1558
	ceph_msg_dump(msg);
S
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1559 1560
}

1561
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
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1562 1563 1564
{
	struct rb_node *p, *n;

1565 1566
	for (p = rb_first(&osdc->osds); p; p = n) {
		struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
S
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1568 1569 1570 1571 1572 1573 1574
		n = rb_next(p);
		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)) != 0)
			__reset_osd(osdc, osd);
S
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1575
	}
1576 1577 1578
}

/*
1579 1580
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
1581
 *
1582
 * Caller should hold map_sem for read.
1583
 */
1584
static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1585
{
1586
	struct ceph_osd_request *req, *nreq;
1587 1588 1589
	struct rb_node *p;
	int needmap = 0;
	int err;
1590

1591
	dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1592
	mutex_lock(&osdc->request_mutex);
1593
	for (p = rb_first(&osdc->requests); p; ) {
1594
		req = rb_entry(p, struct ceph_osd_request, r_node);
1595
		p = rb_next(p);
1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613

		/*
		 * For linger requests that have not yet been
		 * registered, move them to the linger list; they'll
		 * be sent to the osd in the loop below.  Unregister
		 * the request before re-registering it as a linger
		 * request to ensure the __map_request() below
		 * will decide it needs to be sent.
		 */
		if (req->r_linger && list_empty(&req->r_linger_item)) {
			dout("%p tid %llu restart on osd%d\n",
			     req, req->r_tid,
			     req->r_osd ? req->r_osd->o_osd : -1);
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
			continue;
		}

1614
		err = __map_request(osdc, req, force_resend);
1615 1616 1617 1618 1619 1620
		if (err < 0)
			continue;  /* error */
		if (req->r_osd == NULL) {
			dout("%p tid %llu maps to no osd\n", req, req->r_tid);
			needmap++;  /* request a newer map */
		} else if (err > 0) {
1621 1622 1623 1624
			if (!req->r_linger) {
				dout("%p tid %llu requeued on osd%d\n", req,
				     req->r_tid,
				     req->r_osd ? req->r_osd->o_osd : -1);
1625
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
1626 1627
			}
		}
1628 1629 1630 1631 1632 1633
	}

	list_for_each_entry_safe(req, nreq, &osdc->req_linger,
				 r_linger_item) {
		dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);

1634
		err = __map_request(osdc, req, force_resend);
1635
		dout("__map_request returned %d\n", err);
1636 1637 1638 1639 1640 1641 1642 1643
		if (err == 0)
			continue;  /* no change and no osd was specified */
		if (err < 0)
			continue;  /* hrm! */
		if (req->r_osd == NULL) {
			dout("tid %llu maps to no valid osd\n", req->r_tid);
			needmap++;  /* request a newer map */
			continue;
1644
		}
1645 1646 1647 1648

		dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
		     req->r_osd ? req->r_osd->o_osd : -1);
		__register_request(osdc, req);
1649
		__unregister_linger_request(osdc, req);
1650
	}
S
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1651 1652 1653 1654 1655 1656
	mutex_unlock(&osdc->request_mutex);

	if (needmap) {
		dout("%d requests for down osds, need new map\n", needmap);
		ceph_monc_request_next_osdmap(&osdc->client->monc);
	}
1657
	reset_changed_osds(osdc);
1658
}
1659 1660


S
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1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683
/*
 * 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)
{
	void *p, *end, *next;
	u32 nr_maps, maplen;
	u32 epoch;
	struct ceph_osdmap *newmap = NULL, *oldmap;
	int err;
	struct ceph_fsid fsid;

	dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
	p = msg->front.iov_base;
	end = p + msg->front.iov_len;

	/* verify fsid */
	ceph_decode_need(&p, end, sizeof(fsid), bad);
	ceph_decode_copy(&p, &fsid, sizeof(fsid));
1684 1685
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
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1686 1687 1688 1689 1690 1691 1692 1693

	down_write(&osdc->map_sem);

	/* 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);
1694 1695
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
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1696 1697 1698 1699 1700 1701 1702
		ceph_decode_need(&p, end, maplen, bad);
		next = p + maplen;
		if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
			newmap = osdmap_apply_incremental(&p, next,
							  osdc->osdmap,
1703
							  &osdc->client->msgr);
S
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1704 1705 1706 1707
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1708
			BUG_ON(!newmap);
S
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1709 1710 1711 1712
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
1713
			kick_requests(osdc, 0);
S
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1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728
		} else {
			dout("ignoring incremental map %u len %d\n",
			     epoch, maplen);
		}
		p = next;
		nr_maps--;
	}
	if (newmap)
		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);
1729 1730
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
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1731 1732 1733 1734 1735 1736 1737 1738 1739
		ceph_decode_need(&p, end, maplen, bad);
		if (nr_maps > 1) {
			dout("skipping non-latest full map %u len %d\n",
			     epoch, maplen);
		} else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
			dout("skipping full map %u len %d, "
			     "older than our %u\n", epoch, maplen,
			     osdc->osdmap->epoch);
		} else {
1740 1741
			int skipped_map = 0;

S
Sage Weil 已提交
1742 1743 1744 1745 1746 1747
			dout("taking full map %u len %d\n", epoch, maplen);
			newmap = osdmap_decode(&p, p+maplen);
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1748
			BUG_ON(!newmap);
S
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1749 1750
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
1751 1752 1753
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
1754
				ceph_osdmap_destroy(oldmap);
1755 1756
			}
			kick_requests(osdc, skipped_map);
S
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1757 1758 1759 1760 1761 1762 1763 1764
		}
		p += maplen;
		nr_maps--;
	}

done:
	downgrade_write(&osdc->map_sem);
	ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1765 1766 1767 1768 1769 1770 1771 1772 1773

	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
	if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
		ceph_monc_request_next_osdmap(&osdc->client->monc);

A
Alex Elder 已提交
1774 1775 1776
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
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1777
	up_read(&osdc->map_sem);
1778
	wake_up_all(&osdc->client->auth_wq);
S
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1779 1780 1781 1782
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
1783
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1784 1785 1786 1787
	up_write(&osdc->map_sem);
	return;
}

1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869
/*
 * watch/notify callback event infrastructure
 *
 * These callbacks are used both for watch and notify operations.
 */
static void __release_event(struct kref *kref)
{
	struct ceph_osd_event *event =
		container_of(kref, struct ceph_osd_event, kref);

	dout("__release_event %p\n", event);
	kfree(event);
}

static void get_event(struct ceph_osd_event *event)
{
	kref_get(&event->kref);
}

void ceph_osdc_put_event(struct ceph_osd_event *event)
{
	kref_put(&event->kref, __release_event);
}
EXPORT_SYMBOL(ceph_osdc_put_event);

static void __insert_event(struct ceph_osd_client *osdc,
			     struct ceph_osd_event *new)
{
	struct rb_node **p = &osdc->event_tree.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_event *event = NULL;

	while (*p) {
		parent = *p;
		event = rb_entry(parent, struct ceph_osd_event, node);
		if (new->cookie < event->cookie)
			p = &(*p)->rb_left;
		else if (new->cookie > event->cookie)
			p = &(*p)->rb_right;
		else
			BUG();
	}

	rb_link_node(&new->node, parent, p);
	rb_insert_color(&new->node, &osdc->event_tree);
}

static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
					        u64 cookie)
{
	struct rb_node **p = &osdc->event_tree.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_event *event = NULL;

	while (*p) {
		parent = *p;
		event = rb_entry(parent, struct ceph_osd_event, node);
		if (cookie < event->cookie)
			p = &(*p)->rb_left;
		else if (cookie > event->cookie)
			p = &(*p)->rb_right;
		else
			return event;
	}
	return NULL;
}

static void __remove_event(struct ceph_osd_event *event)
{
	struct ceph_osd_client *osdc = event->osdc;

	if (!RB_EMPTY_NODE(&event->node)) {
		dout("__remove_event removed %p\n", event);
		rb_erase(&event->node, &osdc->event_tree);
		ceph_osdc_put_event(event);
	} else {
		dout("__remove_event didn't remove %p\n", event);
	}
}

int ceph_osdc_create_event(struct ceph_osd_client *osdc,
			   void (*event_cb)(u64, u64, u8, void *),
1870
			   void *data, struct ceph_osd_event **pevent)
1871 1872 1873 1874 1875 1876 1877 1878 1879
{
	struct ceph_osd_event *event;

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

	dout("create_event %p\n", event);
	event->cb = event_cb;
1880
	event->one_shot = 0;
1881 1882 1883
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
1884
	RB_CLEAR_NODE(&event->node);
1885 1886 1887 1888 1889 1890 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 1927 1928 1929 1930
	kref_init(&event->kref);   /* one ref for us */
	kref_get(&event->kref);    /* one ref for the caller */

	spin_lock(&osdc->event_lock);
	event->cookie = ++osdc->event_count;
	__insert_event(osdc, event);
	spin_unlock(&osdc->event_lock);

	*pevent = event;
	return 0;
}
EXPORT_SYMBOL(ceph_osdc_create_event);

void ceph_osdc_cancel_event(struct ceph_osd_event *event)
{
	struct ceph_osd_client *osdc = event->osdc;

	dout("cancel_event %p\n", event);
	spin_lock(&osdc->event_lock);
	__remove_event(event);
	spin_unlock(&osdc->event_lock);
	ceph_osdc_put_event(event); /* caller's */
}
EXPORT_SYMBOL(ceph_osdc_cancel_event);


static void do_event_work(struct work_struct *work)
{
	struct ceph_osd_event_work *event_work =
		container_of(work, struct ceph_osd_event_work, work);
	struct ceph_osd_event *event = event_work->event;
	u64 ver = event_work->ver;
	u64 notify_id = event_work->notify_id;
	u8 opcode = event_work->opcode;

	dout("do_event_work completing %p\n", event);
	event->cb(ver, notify_id, opcode, event->data);
	dout("do_event_work completed %p\n", event);
	ceph_osdc_put_event(event);
	kfree(event_work);
}


/*
 * Process osd watch notifications
 */
1931 1932
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952
{
	void *p, *end;
	u8 proto_ver;
	u64 cookie, ver, notify_id;
	u8 opcode;
	struct ceph_osd_event *event;
	struct ceph_osd_event_work *event_work;

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

	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);
	ceph_decode_64_safe(&p, end, ver, bad);
	ceph_decode_64_safe(&p, end, notify_id, bad);

	spin_lock(&osdc->event_lock);
	event = __find_event(osdc, cookie);
	if (event) {
1953
		BUG_ON(event->one_shot);
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
		get_event(event);
	}
	spin_unlock(&osdc->event_lock);
	dout("handle_watch_notify cookie %lld ver %lld event %p\n",
	     cookie, ver, event);
	if (event) {
		event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
		if (!event_work) {
			dout("ERROR: could not allocate event_work\n");
			goto done_err;
		}
1965
		INIT_WORK(&event_work->work, do_event_work);
1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986
		event_work->event = event;
		event_work->ver = ver;
		event_work->notify_id = notify_id;
		event_work->opcode = opcode;
		if (!queue_work(osdc->notify_wq, &event_work->work)) {
			dout("WARNING: failed to queue notify event work\n");
			goto done_err;
		}
	}

	return;

done_err:
	ceph_osdc_put_event(event);
	return;

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

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 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084
/*
 * build new request AND message
 *
 */
void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
				struct ceph_snap_context *snapc, u64 snap_id,
				struct timespec *mtime)
{
	struct ceph_msg *msg = req->r_request;
	void *p;
	size_t msg_size;
	int flags = req->r_flags;
	u64 data_len;
	unsigned int i;

	req->r_snapid = snap_id;
	req->r_snapc = ceph_get_snap_context(snapc);

	/* encode request */
	msg->hdr.version = cpu_to_le16(4);

	p = msg->front.iov_base;
	ceph_encode_32(&p, 1);   /* client_inc  is always 1 */
	req->r_request_osdmap_epoch = p;
	p += 4;
	req->r_request_flags = p;
	p += 4;
	if (req->r_flags & CEPH_OSD_FLAG_WRITE)
		ceph_encode_timespec(p, mtime);
	p += sizeof(struct ceph_timespec);
	req->r_request_reassert_version = p;
	p += sizeof(struct ceph_eversion); /* will get filled in */

	/* oloc */
	ceph_encode_8(&p, 4);
	ceph_encode_8(&p, 4);
	ceph_encode_32(&p, 8 + 4 + 4);
	req->r_request_pool = p;
	p += 8;
	ceph_encode_32(&p, -1);  /* preferred */
	ceph_encode_32(&p, 0);   /* key len */

	ceph_encode_8(&p, 1);
	req->r_request_pgid = p;
	p += 8 + 4;
	ceph_encode_32(&p, -1);  /* preferred */

	/* oid */
	ceph_encode_32(&p, req->r_oid_len);
	memcpy(p, req->r_oid, req->r_oid_len);
	dout("oid '%.*s' len %d\n", req->r_oid_len, req->r_oid, req->r_oid_len);
	p += req->r_oid_len;

	/* ops--can imply data */
	ceph_encode_16(&p, (u16)req->r_num_ops);
	data_len = 0;
	for (i = 0; i < req->r_num_ops; i++) {
		data_len += osd_req_encode_op(req, p, i);
		p += sizeof(struct ceph_osd_op);
	}

	/* snaps */
	ceph_encode_64(&p, req->r_snapid);
	ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
	ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
	if (req->r_snapc) {
		for (i = 0; i < snapc->num_snaps; i++) {
			ceph_encode_64(&p, req->r_snapc->snaps[i]);
		}
	}

	req->r_request_attempts = p;
	p += 4;

	/* data */
	if (flags & CEPH_OSD_FLAG_WRITE) {
		u16 data_off;

		/*
		 * 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).
		 */
		data_off = (u16) (off & 0xffff);
		req->r_request->hdr.data_off = cpu_to_le16(data_off);
	}
	req->r_request->hdr.data_len = cpu_to_le32(data_len);

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

	dout("build_request msg_size was %d\n", (int)msg_size);
}
EXPORT_SYMBOL(ceph_osdc_build_request);

2085 2086 2087 2088 2089 2090 2091 2092 2093
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
	int rc = 0;

S
Sage Weil 已提交
2094 2095
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2096
	__register_request(osdc, req);
2097 2098 2099 2100 2101 2102 2103
	WARN_ON(req->r_sent);
	rc = __map_request(osdc, req, 0);
	if (rc < 0) {
		if (nofail) {
			dout("osdc_start_request failed map, "
				" will retry %lld\n", req->r_tid);
			rc = 0;
S
Sage Weil 已提交
2104
		}
2105
		goto out_unlock;
S
Sage Weil 已提交
2106
	}
2107 2108 2109 2110
	if (req->r_osd == NULL) {
		dout("send_request %p no up osds in pg\n", req);
		ceph_monc_request_next_osdmap(&osdc->client->monc);
	} else {
2111
		__send_queued(osdc);
2112 2113
	}
	rc = 0;
2114
out_unlock:
S
Sage Weil 已提交
2115 2116 2117 2118
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	return rc;
}
2119
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132

/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	int rc;

	rc = wait_for_completion_interruptible(&req->r_completion);
	if (rc < 0) {
		mutex_lock(&osdc->request_mutex);
		__cancel_request(req);
2133
		__unregister_request(osdc, req);
S
Sage Weil 已提交
2134
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2135
		complete_request(req);
2136
		dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
S
Sage Weil 已提交
2137 2138 2139 2140 2141 2142
		return rc;
	}

	dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
	return req->r_result;
}
2143
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
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 2171 2172 2173 2174 2175 2176

/*
 * sync - wait for all in-flight requests to flush.  avoid starvation.
 */
void ceph_osdc_sync(struct ceph_osd_client *osdc)
{
	struct ceph_osd_request *req;
	u64 last_tid, next_tid = 0;

	mutex_lock(&osdc->request_mutex);
	last_tid = osdc->last_tid;
	while (1) {
		req = __lookup_request_ge(osdc, next_tid);
		if (!req)
			break;
		if (req->r_tid > last_tid)
			break;

		next_tid = req->r_tid + 1;
		if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
			continue;

		ceph_osdc_get_request(req);
		mutex_unlock(&osdc->request_mutex);
		dout("sync waiting on tid %llu (last is %llu)\n",
		     req->r_tid, last_tid);
		wait_for_completion(&req->r_safe_completion);
		mutex_lock(&osdc->request_mutex);
		ceph_osdc_put_request(req);
	}
	mutex_unlock(&osdc->request_mutex);
	dout("sync done (thru tid %llu)\n", last_tid);
}
2177
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194

/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
	osdc->osdmap = NULL;
	init_rwsem(&osdc->map_sem);
	init_completion(&osdc->map_waiters);
	osdc->last_requested_map = 0;
	mutex_init(&osdc->request_mutex);
	osdc->last_tid = 0;
	osdc->osds = RB_ROOT;
2195
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2196
	osdc->requests = RB_ROOT;
2197
	INIT_LIST_HEAD(&osdc->req_lru);
2198 2199
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2200
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2201 2202
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2203
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2204 2205 2206
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2207 2208

	schedule_delayed_work(&osdc->osds_timeout_work,
2209
	   round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
S
Sage Weil 已提交
2210

2211
	err = -ENOMEM;
S
Sage Weil 已提交
2212 2213 2214
	osdc->req_mempool = mempool_create_kmalloc_pool(10,
					sizeof(struct ceph_osd_request));
	if (!osdc->req_mempool)
2215
		goto out;
S
Sage Weil 已提交
2216

2217 2218
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2219
				"osd_op");
S
Sage Weil 已提交
2220
	if (err < 0)
2221
		goto out_mempool;
2222
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2223 2224
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2225 2226
	if (err < 0)
		goto out_msgpool;
2227 2228 2229 2230 2231 2232 2233

	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
	if (IS_ERR(osdc->notify_wq)) {
		err = PTR_ERR(osdc->notify_wq);
		osdc->notify_wq = NULL;
		goto out_msgpool;
	}
S
Sage Weil 已提交
2234
	return 0;
2235

S
Sage Weil 已提交
2236 2237
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2238 2239 2240 2241
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2242 2243 2244 2245
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2246 2247
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2248
	cancel_delayed_work_sync(&osdc->timeout_work);
2249
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2250 2251 2252 2253
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2254
	remove_all_osds(osdc);
S
Sage Weil 已提交
2255 2256
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2257
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2258 2259 2260 2261 2262 2263 2264 2265 2266 2267
}

/*
 * 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,
2268
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2269 2270 2271 2272 2273 2274
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2275
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
S
Sage Weil 已提交
2276
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2277
				    NULL, truncate_seq, truncate_size,
2278
				    false);
2279 2280
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2281 2282

	/* it may be a short read due to an object boundary */
2283

2284
	osd_req_op_extent_osd_data_pages(req, 0,
2285
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2286

2287
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2288
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2289

2290
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2291

S
Sage Weil 已提交
2292 2293 2294 2295 2296 2297 2298 2299
	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;
}
2300
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310

/*
 * 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,
2311
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2312 2313 2314
{
	struct ceph_osd_request *req;
	int rc = 0;
2315
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2316

2317
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2318
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
S
Sage Weil 已提交
2319
				    CEPH_OSD_OP_WRITE,
2320
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2321
				    snapc, truncate_seq, truncate_size,
2322
				    true);
2323 2324
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2325 2326

	/* it may be a short write due to an object boundary */
2327
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2328 2329
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2330

2331
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2332

2333
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2334 2335 2336 2337 2338 2339 2340 2341 2342
	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;
}
2343
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2344 2345 2346 2347 2348 2349 2350

/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2351
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2352 2353 2354
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2355
		goto out;
2356
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2357 2358 2359 2360 2361 2362

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2363
		handle_reply(osdc, msg, con);
S
Sage Weil 已提交
2364
		break;
2365 2366 2367
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2368 2369 2370 2371 2372

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2373
out:
S
Sage Weil 已提交
2374 2375 2376
	ceph_msg_put(msg);
}

2377
/*
2378 2379
 * lookup and return message for incoming reply.  set up reply message
 * pages.
2380 2381
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2382 2383
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2384 2385 2386
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2387
	struct ceph_msg *m;
2388
	struct ceph_osd_request *req;
2389 2390
	int front = le32_to_cpu(hdr->front_len);
	int data_len = le32_to_cpu(hdr->data_len);
2391
	u64 tid;
S
Sage Weil 已提交
2392

2393 2394 2395 2396 2397 2398
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
		*skip = 1;
		m = NULL;
2399 2400
		dout("get_reply unknown tid %llu from osd%d\n", tid,
		     osd->o_osd);
2401 2402
		goto out;
	}
S
Sage Weil 已提交
2403

2404
	if (req->r_reply->con)
2405
		dout("%s revoking msg %p from old con %p\n", __func__,
2406 2407
		     req->r_reply, req->r_reply->con);
	ceph_msg_revoke_incoming(req->r_reply);
2408

S
Sage Weil 已提交
2409 2410 2411
	if (front > req->r_reply->front.iov_len) {
		pr_warning("get_reply front %d > preallocated %d\n",
			   front, (int)req->r_reply->front.iov_len);
2412
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2413
		if (!m)
S
Sage Weil 已提交
2414 2415 2416 2417 2418 2419
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
	m = ceph_msg_get(req->r_reply);

2420
	if (data_len > 0) {
2421
		struct ceph_osd_data *osd_data;
2422

2423 2424 2425 2426 2427
		/*
		 * XXX This is assuming there is only one op containing
		 * XXX page data.  Probably OK for reads, but this
		 * XXX ought to be done more generally.
		 */
2428
		osd_data = osd_req_op_extent_osd_data(req, 0);
2429 2430
		if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
			if (osd_data->pages &&
2431
				unlikely(osd_data->length < data_len)) {
2432

2433 2434 2435
				pr_warning("tid %lld reply has %d bytes "
					"we had only %llu bytes ready\n",
					tid, data_len, osd_data->length);
2436 2437 2438 2439 2440 2441
				*skip = 1;
				ceph_msg_put(m);
				m = NULL;
				goto out;
			}
		}
2442
	}
2443
	*skip = 0;
S
Sage Weil 已提交
2444
	dout("get_reply tid %lld %p\n", tid, m);
2445 2446 2447

out:
	mutex_unlock(&osdc->request_mutex);
2448
	return m;
2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459

}

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);
	int front = le32_to_cpu(hdr->front_len);

A
Alex Elder 已提交
2460
	*skip = 0;
2461 2462
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2463
	case CEPH_MSG_WATCH_NOTIFY:
2464
		return ceph_msg_new(type, front, GFP_NOFS, false);
2465 2466 2467 2468 2469 2470 2471 2472
	case CEPH_MSG_OSD_OPREPLY:
		return get_reply(con, hdr, skip);
	default:
		pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
			osd->o_osd);
		*skip = 1;
		return NULL;
	}
S
Sage Weil 已提交
2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
}

/*
 * 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);
}

2492 2493 2494
/*
 * authentication
 */
2495 2496 2497 2498 2499
/*
 * 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,
2500
					int *proto, int force_new)
2501 2502 2503 2504
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2505
	struct ceph_auth_handshake *auth = &o->o_auth;
2506

2507
	if (force_new && auth->authorizer) {
2508
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2509 2510
		auth->authorizer = NULL;
	}
2511 2512 2513
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2514
		if (ret)
2515
			return ERR_PTR(ret);
2516 2517
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2518 2519 2520
						     auth);
		if (ret)
			return ERR_PTR(ret);
2521 2522
	}
	*proto = ac->protocol;
2523

2524
	return auth;
2525 2526 2527 2528 2529 2530 2531 2532 2533
}


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;

2534
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2535 2536
}

2537 2538 2539 2540 2541 2542
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;

2543
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2544 2545
	return ceph_monc_validate_auth(&osdc->client->monc);
}
2546

2547
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
2548 2549 2550
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
2551 2552
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
2553
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
2554
	.alloc_msg = alloc_msg,
2555
	.fault = osd_reset,
S
Sage Weil 已提交
2556
};