osd_client.c 66.8 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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#define osd_req_op_data(oreq, whch, typ, fld)	\
	({						\
		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);

struct ceph_osd_data *
osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
			unsigned int which)
{
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	return osd_req_op_data(osd_req, which, cls, response_data);
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}
EXPORT_SYMBOL(osd_req_op_cls_response_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);
}
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;

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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:
		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 *
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_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
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				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_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode)
{
	(void)_osd_req_op_init(osd_req, which, opcode);
}
EXPORT_SYMBOL(osd_req_op_init);

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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,
524
			u16 opcode, const char *class, const char *method)
525
{
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	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
527
	struct ceph_pagelist *pagelist;
528 529 530 531 532
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

533 534 535 536
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

537 538 539 540
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
541
	ceph_pagelist_append(pagelist, class, size);
542 543 544 545 546 547
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
548
	ceph_pagelist_append(pagelist, method, size);
549 550
	payload_len += size;

551
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
552

553 554 555 556 557
	op->cls.argc = 0;	/* currently unused */

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
558

559 560
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
561 562
				u64 cookie, u64 version, int flag)
{
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	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
564

565
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
566 567 568 569 570

	op->watch.cookie = cookie;
	/* op->watch.ver = version; */	/* XXX 3847 */
	op->watch.ver = cpu_to_le64(version);
	if (opcode == CEPH_OSD_OP_WATCH && flag)
571
		op->watch.flag = (u8)1;
572 573 574
}
EXPORT_SYMBOL(osd_req_op_watch_init);

575
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
576 577 578 579 580 581 582
				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)
583
			ceph_msg_data_add_pages(msg, osd_data->pages,
584 585 586
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
587
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
588 589
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
590
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
591 592 593 594 595 596
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

597
static u64 osd_req_encode_op(struct ceph_osd_request *req,
598
			      struct ceph_osd_op *dst, unsigned int which)
599
{
600
	struct ceph_osd_req_op *src;
601
	struct ceph_osd_data *osd_data;
602
	u64 request_data_len = 0;
603
	u64 data_length;
604

605 606
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
607 608 609 610 611 612 613 614
	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:
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		osd_data = &src->raw_data_in;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
617 618 619 620
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
		if (src->op == CEPH_OSD_OP_WRITE)
621
			request_data_len = src->extent.length;
622 623 624 625 626 627
		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);
628
		osd_data = &src->extent.osd_data;
629
		if (src->op == CEPH_OSD_OP_WRITE)
630
			ceph_osdc_msg_data_add(req->r_request, osd_data);
631
		else
632
			ceph_osdc_msg_data_add(req->r_reply, osd_data);
633 634 635 636
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
		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);
653 654 655 656 657 658 659 660 661 662
		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:
663
		pr_err("unsupported osd opcode %s\n",
664
			ceph_osd_op_name(src->op));
665
		WARN_ON(1);
666 667

		return 0;
668
	}
669
	dst->op = cpu_to_le16(src->op);
670
	dst->payload_len = cpu_to_le32(src->payload_len);
671

672
	return request_data_len;
673 674
}

675 676 677 678 679 680 681 682 683 684 685 686 687 688
/*
 * 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,
689
					       u64 off, u64 *plen, int num_ops,
690 691 692 693
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
694
					       bool use_mempool)
695
{
696
	struct ceph_osd_request *req;
697 698 699
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
700 701
	u32 object_size;
	u64 object_base;
702
	int r;
703

704
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE);
705

706
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
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707
					GFP_NOFS);
708
	if (!req)
709
		return ERR_PTR(-ENOMEM);
710

711
	req->r_flags = flags;
712 713

	/* calculate max write size */
714
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
715 716
	if (r < 0) {
		ceph_osdc_put_request(req);
717
		return ERR_PTR(r);
718
	}
719

720 721 722 723 724 725 726 727
	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;
728
	}
729

730
	osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
731
				truncate_size, truncate_seq);
732

733 734 735 736 737 738
	/*
	 * 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)
739
		osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
740

741 742
	req->r_file_layout = *layout;  /* keep a copy */

743 744
	snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx",
		vino.ino, objnum);
745 746
	req->r_oid_len = strlen(req->r_oid);

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	return req;
}
749
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;
}

816 817 818 819 820 821
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
822
	struct ceph_osd_request *req, *nreq;
823
	LIST_HEAD(resend);
824 825 826 827
	int err;

	dout("__kick_osd_requests osd%d\n", osd->o_osd);
	err = __reset_osd(osdc, osd);
828
	if (err)
829
		return;
830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
	/*
	 * 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.
	 */
847
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
848 849 850 851
		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,
852
		     osd->o_osd);
853 854 855
		if (!req->r_linger)
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
	}
856
	list_splice(&resend, &osdc->req_unsent);
857

858 859 860 861 862
	/*
	 * 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.
	 */
863 864
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
				 r_linger_osd) {
865 866 867 868 869
		/*
		 * reregister request prior to unregistering linger so
		 * that r_osd is preserved.
		 */
		BUG_ON(!list_empty(&req->r_req_lru_item));
870
		__register_request(osdc, req);
871
		list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
872
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
873
		__unregister_linger_request(osdc, req);
874 875
		dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
		     osd->o_osd);
876 877 878
	}
}

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879
/*
880
 * If the osd connection drops, we need to resubmit all requests.
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881 882 883 884 885 886 887 888 889 890 891
 */
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);
S
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892 893
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
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894
	__send_queued(osdc);
S
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895
	mutex_unlock(&osdc->request_mutex);
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896 897 898 899 900 901
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
902
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
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903 904 905 906 907 908 909 910 911
{
	struct ceph_osd *osd;

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

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
912
	osd->o_osd = onum;
913
	RB_CLEAR_NODE(&osd->o_node);
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914
	INIT_LIST_HEAD(&osd->o_requests);
915
	INIT_LIST_HEAD(&osd->o_linger_requests);
916
	INIT_LIST_HEAD(&osd->o_osd_lru);
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917 918
	osd->o_incarnation = 1;

919
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
920

921
	INIT_LIST_HEAD(&osd->o_keepalive_item);
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922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940
	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);
941
	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
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942 943
		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

944
		ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
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945
		kfree(osd);
S
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946
	}
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947 948 949 950 951
}

/*
 * remove an osd from our map
 */
952
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
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953
{
954
	dout("__remove_osd %p\n", osd);
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955 956
	BUG_ON(!list_empty(&osd->o_requests));
	rb_erase(&osd->o_node, &osdc->osds);
957
	list_del_init(&osd->o_osd_lru);
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958 959 960 961
	ceph_con_close(&osd->o_con);
	put_osd(osd);
}

962 963
static void remove_all_osds(struct ceph_osd_client *osdc)
{
964
	dout("%s %p\n", __func__, osdc);
965 966 967 968 969 970 971 972 973
	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);
}

974 975 976 977 978 979
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);
980
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
981 982 983 984 985 986 987 988 989
}

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);
}

990
static void remove_old_osds(struct ceph_osd_client *osdc)
991 992 993 994 995 996
{
	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) {
997
		if (time_before(jiffies, osd->lru_ttl))
998 999 1000 1001 1002 1003
			break;
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

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/*
 * reset osd connect
 */
1007
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
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1008
{
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1009
	struct ceph_entity_addr *peer_addr;
S
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1010

1011
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1012 1013
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1014
		__remove_osd(osdc, osd);
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1015 1016 1017 1018 1019 1020 1021 1022 1023

		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;

1024 1025 1026 1027 1028
		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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1029 1030

		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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1038 1039 1040 1041 1042 1043 1044 1045
}

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;

1046
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
S
Sage Weil 已提交
1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
	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;
}

1079 1080 1081
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1082
			osdc->client->options->osd_keepalive_timeout * HZ);
1083 1084 1085 1086 1087 1088
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
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1089 1090 1091 1092 1093

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1094 1095
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1096 1097
{
	req->r_tid = ++osdc->last_tid;
1098
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1099
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
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1100 1101 1102 1103
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1104 1105
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1106
	}
1107 1108
}

S
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1109 1110 1111 1112 1113 1114
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1115 1116 1117 1118 1119 1120
	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
1121 1122 1123 1124
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
	osdc->num_requests--;

1125 1126
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1127
		ceph_msg_revoke(req->r_request);
1128 1129

		list_del_init(&req->r_osd_item);
1130 1131 1132
		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);
1133
			__move_osd_to_lru(osdc, req->r_osd);
1134
		}
1135
		if (list_empty(&req->r_linger_item))
1136
			req->r_osd = NULL;
1137
	}
S
Sage Weil 已提交
1138

A
Alex Elder 已提交
1139
	list_del_init(&req->r_req_lru_item);
S
Sage Weil 已提交
1140 1141
	ceph_osdc_put_request(req);

1142 1143 1144
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1145 1146 1147 1148 1149 1150 1151 1152
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1153
	if (req->r_sent && req->r_osd) {
1154
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1155 1156 1157 1158
		req->r_sent = 0;
	}
}

1159 1160 1161 1162 1163
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);
1164 1165 1166
	if (req->r_osd)
		list_add_tail(&req->r_linger_osd,
			      &req->r_osd->o_linger_requests);
1167 1168 1169 1170 1171 1172
}

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
1173
	list_del_init(&req->r_linger_item);
1174 1175 1176 1177 1178 1179 1180 1181
	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);
		}
1182 1183
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
	}
}

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
1214 1215 1216
/*
 * 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
1217
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1218
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1219 1220 1221 1222 1223
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1224
static int __map_request(struct ceph_osd_client *osdc,
1225
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1226
{
1227
	struct ceph_pg pgid;
1228 1229
	int acting[CEPH_PG_MAX_SIZE];
	int o = -1, num = 0;
S
Sage Weil 已提交
1230 1231
	int err;

1232
	dout("map_request %p tid %lld\n", req, req->r_tid);
1233 1234
	err = ceph_calc_ceph_pg(&pgid, req->r_oid, osdc->osdmap,
				ceph_file_layout_pg_pool(req->r_file_layout));
1235 1236
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1237
		return err;
1238
	}
1239 1240
	req->r_pgid = pgid;

1241 1242 1243 1244 1245
	err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
	if (err > 0) {
		o = acting[0];
		num = err;
	}
S
Sage Weil 已提交
1246

1247 1248
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1249 1250 1251
	     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
1252 1253 1254
	    (req->r_osd == NULL && o == -1))
		return 0;  /* no change */

1255 1256
	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
1257 1258
	     req->r_osd ? req->r_osd->o_osd : -1);

1259 1260 1261 1262
	/* 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
1263 1264 1265 1266 1267 1268 1269 1270
	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) {
1271
		err = -ENOMEM;
1272
		req->r_osd = create_osd(osdc, o);
1273 1274
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1275
			goto out;
1276
		}
S
Sage Weil 已提交
1277

1278
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1279 1280
		__insert_osd(osdc, req->r_osd);

1281 1282 1283
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1284 1285
	}

1286 1287
	if (req->r_osd) {
		__remove_osd_from_lru(req->r_osd);
1288 1289
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
		list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
1290
	} else {
1291
		list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
1292
	}
1293
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1294 1295 1296 1297 1298 1299 1300 1301

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1302 1303
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1304
{
1305
	void *p;
S
Sage Weil 已提交
1306

1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
	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));
1321

S
Sage Weil 已提交
1322
	req->r_stamp = jiffies;
1323
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1324 1325

	ceph_msg_get(req->r_request); /* send consumes a ref */
1326 1327 1328 1329 1330

	/* 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
1331
	req->r_sent = req->r_osd->o_incarnation;
1332 1333

	ceph_con_send(&req->r_osd->o_con, req->r_request);
S
Sage Weil 已提交
1334 1335
}

1336 1337 1338
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1339
static void __send_queued(struct ceph_osd_client *osdc)
1340 1341 1342
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1343 1344
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1345 1346 1347
		__send_request(osdc, req);
}

S
Sage Weil 已提交
1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360
/*
 * 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
1361
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1362
	struct ceph_osd *osd;
1363
	unsigned long keepalive =
1364
		osdc->client->options->osd_keepalive_timeout * HZ;
1365
	struct list_head slow_osds;
S
Sage Weil 已提交
1366 1367 1368 1369 1370 1371 1372
	dout("timeout\n");
	down_read(&osdc->map_sem);

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

	mutex_lock(&osdc->request_mutex);

1373 1374 1375 1376 1377 1378 1379
	/*
	 * 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
1380
		if (time_before(jiffies, req->r_stamp + keepalive))
1381 1382 1383 1384 1385
			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
1386
		     req->r_tid, osd->o_osd);
1387 1388 1389 1390 1391 1392
		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
1393 1394 1395
		ceph_con_keepalive(&osd->o_con);
	}

1396
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1397
	__send_queued(osdc);
S
Sage Weil 已提交
1398 1399 1400 1401
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1402 1403 1404 1405 1406 1407
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 =
1408
		osdc->client->options->osd_idle_ttl * HZ >> 2;
1409 1410 1411

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1412
	remove_old_osds(osdc);
1413 1414 1415 1416 1417 1418
	up_read(&osdc->map_sem);

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

S
Sage Weil 已提交
1419 1420
static void complete_request(struct ceph_osd_request *req)
{
1421 1422
	if (req->r_unsafe_callback)
		req->r_unsafe_callback(req, false);
S
Sage Weil 已提交
1423 1424 1425
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1426 1427 1428 1429
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1430 1431
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
			 struct ceph_connection *con)
S
Sage Weil 已提交
1432
{
1433
	void *p, *end;
S
Sage Weil 已提交
1434 1435
	struct ceph_osd_request *req;
	u64 tid;
1436
	int object_len;
1437 1438
	unsigned int numops;
	int payload_len, flags;
1439
	s32 result;
1440 1441 1442 1443 1444 1445
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1446
	int already_completed;
1447
	u32 bytes;
1448
	unsigned int i;
S
Sage Weil 已提交
1449

1450
	tid = le64_to_cpu(msg->hdr.tid);
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460
	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;

1461
	err = ceph_decode_pgid(&p, end, &pg);
1462
	if (err)
S
Sage Weil 已提交
1463
		goto bad;
1464 1465 1466 1467 1468 1469 1470 1471

	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
1472 1473 1474 1475 1476
	/* lookup */
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1477
		goto bad_mutex;
S
Sage Weil 已提交
1478 1479
	}
	ceph_osdc_get_request(req);
1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501

	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);
	}
1502 1503
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1504
		pr_warning("sum of op payload lens %d != data_len %d",
1505
			   payload_len, bytes);
1506 1507 1508 1509 1510 1511 1512
		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
1513 1514 1515

	if (!req->r_got_reply) {

1516
		req->r_result = result;
S
Sage Weil 已提交
1517 1518 1519 1520 1521 1522
		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, */
1523 1524
		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
1525 1526 1527 1528

		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
1529
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1530 1531 1532 1533 1534
		goto done;
	}

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

1535 1536 1537
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1538
	/* either this is a read, or we got the safe response */
1539 1540
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1541 1542 1543
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

1544 1545
	already_completed = req->r_completed;
	req->r_completed = 1;
S
Sage Weil 已提交
1546
	mutex_unlock(&osdc->request_mutex);
1547 1548
	if (already_completed)
		goto done;
S
Sage Weil 已提交
1549 1550 1551 1552

	if (req->r_callback)
		req->r_callback(req, msg);
	else
1553
		complete_all(&req->r_completion);
S
Sage Weil 已提交
1554

S
Sage Weil 已提交
1555 1556
	if (flags & CEPH_OSD_FLAG_ONDISK)
		complete_request(req);
S
Sage Weil 已提交
1557 1558

done:
1559
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
Sage Weil 已提交
1560 1561 1562
	ceph_osdc_put_request(req);
	return;

1563 1564
bad_put:
	ceph_osdc_put_request(req);
1565 1566
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1567
bad:
1568 1569
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1570
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1571 1572
}

1573
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
1574 1575 1576
{
	struct rb_node *p, *n;

1577 1578
	for (p = rb_first(&osdc->osds); p; p = n) {
		struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
S
Sage Weil 已提交
1579

1580 1581 1582 1583 1584 1585 1586
		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
Sage Weil 已提交
1587
	}
1588 1589 1590
}

/*
1591 1592
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
1593
 *
1594
 * Caller should hold map_sem for read.
1595
 */
1596
static void kick_requests(struct ceph_osd_client *osdc, int force_resend)
1597
{
1598
	struct ceph_osd_request *req, *nreq;
1599 1600 1601
	struct rb_node *p;
	int needmap = 0;
	int err;
1602

1603
	dout("kick_requests %s\n", force_resend ? " (force resend)" : "");
1604
	mutex_lock(&osdc->request_mutex);
1605
	for (p = rb_first(&osdc->requests); p; ) {
1606
		req = rb_entry(p, struct ceph_osd_request, r_node);
1607
		p = rb_next(p);
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625

		/*
		 * 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;
		}

1626
		err = __map_request(osdc, req, force_resend);
1627 1628 1629 1630 1631 1632
		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) {
1633 1634 1635 1636
			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);
1637
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
1638 1639
			}
		}
1640 1641 1642 1643 1644 1645
	}

	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);

1646
		err = __map_request(osdc, req, force_resend);
1647
		dout("__map_request returned %d\n", err);
1648 1649 1650 1651 1652 1653 1654 1655
		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;
1656
		}
1657 1658 1659 1660

		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);
1661
		__unregister_linger_request(osdc, req);
1662
	}
S
Sage Weil 已提交
1663 1664 1665 1666 1667 1668
	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);
	}
1669
	reset_changed_osds(osdc);
1670
}
1671 1672


S
Sage Weil 已提交
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
/*
 * 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));
1696 1697
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
1698 1699 1700 1701 1702 1703 1704 1705

	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);
1706 1707
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1708 1709 1710 1711 1712 1713 1714
		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,
1715
							  &osdc->client->msgr);
S
Sage Weil 已提交
1716 1717 1718 1719
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
1720
			BUG_ON(!newmap);
S
Sage Weil 已提交
1721 1722 1723 1724
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
1725
			kick_requests(osdc, 0);
S
Sage Weil 已提交
1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740
		} 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);
1741 1742
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
1743 1744 1745 1746 1747 1748 1749 1750 1751
		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 {
1752 1753
			int skipped_map = 0;

S
Sage Weil 已提交
1754 1755 1756 1757 1758 1759
			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;
			}
1760
			BUG_ON(!newmap);
S
Sage Weil 已提交
1761 1762
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
1763 1764 1765
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
1766
				ceph_osdmap_destroy(oldmap);
1767 1768
			}
			kick_requests(osdc, skipped_map);
S
Sage Weil 已提交
1769 1770 1771 1772 1773 1774 1775 1776
		}
		p += maplen;
		nr_maps--;
	}

done:
	downgrade_write(&osdc->map_sem);
	ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
1777 1778 1779 1780 1781 1782 1783 1784 1785

	/*
	 * 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
1786 1787 1788
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1789
	up_read(&osdc->map_sem);
1790
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
1791 1792 1793 1794
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
1795
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1796 1797 1798 1799
	up_write(&osdc->map_sem);
	return;
}

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 1876 1877 1878 1879 1880 1881
/*
 * 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 *),
1882
			   void *data, struct ceph_osd_event **pevent)
1883 1884 1885 1886 1887 1888 1889 1890 1891
{
	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;
1892
	event->one_shot = 0;
1893 1894 1895
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
1896
	RB_CLEAR_NODE(&event->node);
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 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942
	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
 */
1943 1944
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964
{
	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) {
1965
		BUG_ON(event->one_shot);
1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976
		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;
		}
1977
		INIT_WORK(&event_work->work, do_event_work);
1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
		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;
}

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 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096
/*
 * 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);

2097 2098 2099 2100 2101 2102 2103 2104 2105
/*
 * 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
2106 2107
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2108
	__register_request(osdc, req);
2109 2110 2111 2112 2113 2114 2115
	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
2116
		}
2117
		goto out_unlock;
S
Sage Weil 已提交
2118
	}
2119 2120 2121 2122
	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 {
2123
		__send_queued(osdc);
2124 2125
	}
	rc = 0;
2126
out_unlock:
S
Sage Weil 已提交
2127 2128 2129 2130
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	return rc;
}
2131
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144

/*
 * 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);
2145
		__unregister_request(osdc, req);
S
Sage Weil 已提交
2146
		mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2147
		complete_request(req);
2148
		dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
S
Sage Weil 已提交
2149 2150 2151 2152 2153 2154
		return rc;
	}

	dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
	return req->r_result;
}
2155
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188

/*
 * 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);
}
2189
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206

/*
 * 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;
2207
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2208
	osdc->requests = RB_ROOT;
2209
	INIT_LIST_HEAD(&osdc->req_lru);
2210 2211
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2212
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2213 2214
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2215
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2216 2217 2218
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2219 2220

	schedule_delayed_work(&osdc->osds_timeout_work,
2221
	   round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
S
Sage Weil 已提交
2222

2223
	err = -ENOMEM;
S
Sage Weil 已提交
2224 2225 2226
	osdc->req_mempool = mempool_create_kmalloc_pool(10,
					sizeof(struct ceph_osd_request));
	if (!osdc->req_mempool)
2227
		goto out;
S
Sage Weil 已提交
2228

2229 2230
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2231
				"osd_op");
S
Sage Weil 已提交
2232
	if (err < 0)
2233
		goto out_mempool;
2234
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2235 2236
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2237 2238
	if (err < 0)
		goto out_msgpool;
2239 2240 2241 2242 2243 2244 2245

	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
2246
	return 0;
2247

S
Sage Weil 已提交
2248 2249
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2250 2251 2252 2253
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2254 2255 2256 2257
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2258 2259
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2260
	cancel_delayed_work_sync(&osdc->timeout_work);
2261
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2262 2263 2264 2265
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2266
	remove_all_osds(osdc);
S
Sage Weil 已提交
2267 2268
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2269
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2270 2271 2272 2273 2274 2275 2276 2277 2278 2279
}

/*
 * 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,
2280
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2281 2282 2283 2284 2285 2286
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2287
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
S
Sage Weil 已提交
2288
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2289
				    NULL, truncate_seq, truncate_size,
2290
				    false);
2291 2292
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2293 2294

	/* it may be a short read due to an object boundary */
2295

2296
	osd_req_op_extent_osd_data_pages(req, 0,
2297
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2298

2299
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2300
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2301

2302
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2303

S
Sage Weil 已提交
2304 2305 2306 2307 2308 2309 2310 2311
	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;
}
2312
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2313 2314 2315 2316 2317 2318 2319 2320 2321 2322

/*
 * 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,
2323
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2324 2325 2326
{
	struct ceph_osd_request *req;
	int rc = 0;
2327
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2328

2329
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2330
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
S
Sage Weil 已提交
2331
				    CEPH_OSD_OP_WRITE,
2332
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2333
				    snapc, truncate_seq, truncate_size,
2334
				    true);
2335 2336
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2337 2338

	/* it may be a short write due to an object boundary */
2339
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2340 2341
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2342

2343
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2344

2345
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2346 2347 2348 2349 2350 2351 2352 2353 2354
	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;
}
2355
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2356 2357 2358 2359 2360 2361 2362

/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2363
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2364 2365 2366
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2367
		goto out;
2368
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2369 2370 2371 2372 2373 2374

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2375
		handle_reply(osdc, msg, con);
S
Sage Weil 已提交
2376
		break;
2377 2378 2379
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2380 2381 2382 2383 2384

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2385
out:
S
Sage Weil 已提交
2386 2387 2388
	ceph_msg_put(msg);
}

2389
/*
2390 2391
 * lookup and return message for incoming reply.  set up reply message
 * pages.
2392 2393
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2394 2395
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2396 2397 2398
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2399
	struct ceph_msg *m;
2400
	struct ceph_osd_request *req;
2401 2402
	int front = le32_to_cpu(hdr->front_len);
	int data_len = le32_to_cpu(hdr->data_len);
2403
	u64 tid;
S
Sage Weil 已提交
2404

2405 2406 2407 2408 2409 2410
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
		*skip = 1;
		m = NULL;
2411 2412
		dout("get_reply unknown tid %llu from osd%d\n", tid,
		     osd->o_osd);
2413 2414
		goto out;
	}
S
Sage Weil 已提交
2415

2416
	if (req->r_reply->con)
2417
		dout("%s revoking msg %p from old con %p\n", __func__,
2418 2419
		     req->r_reply, req->r_reply->con);
	ceph_msg_revoke_incoming(req->r_reply);
2420

S
Sage Weil 已提交
2421 2422 2423
	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);
2424
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
2425
		if (!m)
S
Sage Weil 已提交
2426 2427 2428 2429 2430 2431
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
	m = ceph_msg_get(req->r_reply);

2432
	if (data_len > 0) {
2433
		struct ceph_osd_data *osd_data;
2434

2435 2436 2437 2438 2439
		/*
		 * 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.
		 */
2440
		osd_data = osd_req_op_extent_osd_data(req, 0);
2441 2442
		if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
			if (osd_data->pages &&
2443
				unlikely(osd_data->length < data_len)) {
2444

2445 2446 2447
				pr_warning("tid %lld reply has %d bytes "
					"we had only %llu bytes ready\n",
					tid, data_len, osd_data->length);
2448 2449 2450 2451 2452 2453
				*skip = 1;
				ceph_msg_put(m);
				m = NULL;
				goto out;
			}
		}
2454
	}
2455
	*skip = 0;
S
Sage Weil 已提交
2456
	dout("get_reply tid %lld %p\n", tid, m);
2457 2458 2459

out:
	mutex_unlock(&osdc->request_mutex);
2460
	return m;
2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471

}

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
2472
	*skip = 0;
2473 2474
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2475
	case CEPH_MSG_WATCH_NOTIFY:
2476
		return ceph_msg_new(type, front, GFP_NOFS, false);
2477 2478 2479 2480 2481 2482 2483 2484
	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
2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503
}

/*
 * 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);
}

2504 2505 2506
/*
 * authentication
 */
2507 2508 2509 2510 2511
/*
 * 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,
2512
					int *proto, int force_new)
2513 2514 2515 2516
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2517
	struct ceph_auth_handshake *auth = &o->o_auth;
2518

2519
	if (force_new && auth->authorizer) {
2520
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2521 2522
		auth->authorizer = NULL;
	}
2523 2524 2525
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2526
		if (ret)
2527
			return ERR_PTR(ret);
2528 2529
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2530 2531 2532
						     auth);
		if (ret)
			return ERR_PTR(ret);
2533 2534
	}
	*proto = ac->protocol;
2535

2536
	return auth;
2537 2538 2539 2540 2541 2542 2543 2544 2545
}


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;

2546
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2547 2548
}

2549 2550 2551 2552 2553 2554
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;

2555
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2556 2557
	return ceph_monc_validate_auth(&osdc->client->monc);
}
2558

2559
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
2560 2561 2562
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
2563 2564
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
2565
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
2566
	.alloc_msg = alloc_msg,
2567
	.fault = osd_reset,
S
Sage Weil 已提交
2568
};