osd_client.c 79.9 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 struct kmem_cache	*ceph_osd_request_cache;

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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);
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static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req);
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static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req);
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static void __enqueue_request(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)				\
({									\
	struct ceph_osd_request *__oreq = (oreq);			\
	unsigned int __whch = (whch);					\
	BUG_ON(__whch >= __oreq->r_num_ops);				\
	&__oreq->r_ops[__whch].typ.fld;					\
})
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static struct ceph_osd_data *
osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
{
	BUG_ON(which >= osd_req->r_num_ops);

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

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

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

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

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

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

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

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

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

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

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

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

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/*
 * requests
 */
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static void ceph_osdc_release_request(struct kref *kref)
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{
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	struct ceph_osd_request *req = container_of(kref,
					    struct ceph_osd_request, r_kref);
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	unsigned int which;
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	dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
	     req->r_request, req->r_reply);
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	WARN_ON(!RB_EMPTY_NODE(&req->r_node));
	WARN_ON(!list_empty(&req->r_req_lru_item));
	WARN_ON(!list_empty(&req->r_osd_item));
	WARN_ON(!list_empty(&req->r_linger_item));
	WARN_ON(!list_empty(&req->r_linger_osd_item));
	WARN_ON(req->r_osd);
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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);
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	else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
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		kmem_cache_free(ceph_osd_request_cache, req);
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	else
		kfree(req);
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}
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void ceph_osdc_get_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
	     atomic_read(&req->r_kref.refcount));
	kref_get(&req->r_kref);
}
EXPORT_SYMBOL(ceph_osdc_get_request);

void ceph_osdc_put_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
	     atomic_read(&req->r_kref.refcount));
	kref_put(&req->r_kref, ceph_osdc_release_request);
}
EXPORT_SYMBOL(ceph_osdc_put_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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	if (use_mempool) {
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		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
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		req = mempool_alloc(osdc->req_mempool, gfp_flags);
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	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
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	} else {
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		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
		req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
			      gfp_flags);
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	}
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	if (unlikely(!req))
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		return NULL;
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	/* req only, each op is zeroed in _osd_req_op_init() */
	memset(req, 0, sizeof(*req));

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	req->r_osdc = osdc;
	req->r_mempool = use_mempool;
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	req->r_num_ops = num_ops;
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	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);
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	INIT_LIST_HEAD(&req->r_linger_osd_item);
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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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	req->r_base_oloc.pool = -1;
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	req->r_target_oloc.pool = -1;
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	msg_size = OSD_OPREPLY_FRONT_LEN;
	if (num_ops > CEPH_OSD_SLAB_OPS) {
		/* ceph_osd_op and rval */
		msg_size += (num_ops - CEPH_OSD_SLAB_OPS) *
			    (sizeof(struct ceph_osd_op) + 4);
	}

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	/* create reply message */
	if (use_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
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		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, 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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	}
	req->r_reply = msg;

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	msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
	msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
	msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
	msg_size += 1 + 8 + 4 + 4; /* pgid */
	msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
	msg_size += 2 + num_ops * sizeof(struct ceph_osd_op);
	msg_size += 8; /* snapid */
	msg_size += 8; /* snap_seq */
	msg_size += 4 + 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
	msg_size += 4; /* retry_attempt */

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	/* 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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#define GENERATE_CASE(op, opcode, str)	case CEPH_OSD_OP_##op: return true;
__CEPH_FORALL_OSD_OPS(GENERATE_CASE)
#undef GENERATE_CASE
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	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, u32 flags)
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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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	op->flags = flags;
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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,
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		     unsigned int which, u16 opcode, u32 flags)
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{
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	(void)_osd_req_op_init(osd_req, which, opcode, flags);
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}
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, 0);
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	size_t payload_len = 0;

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	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
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	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
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	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
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	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
512 513
		payload_len += length;

514
	op->indata_len = payload_len;
515 516 517
}
EXPORT_SYMBOL(osd_req_op_extent_init);

518 519
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
520
{
521 522 523 524 525 526
	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;
527 528 529 530 531 532

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

	op->extent.length = length;
533
	op->indata_len -= previous - length;
534 535 536
}
EXPORT_SYMBOL(osd_req_op_extent_update);

537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558
void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
				unsigned int which, u64 offset_inc)
{
	struct ceph_osd_req_op *op, *prev_op;

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

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

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

559
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
560
			u16 opcode, const char *class, const char *method)
561
{
562 563
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
564
	struct ceph_pagelist *pagelist;
565 566 567 568 569
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

570 571 572 573
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

574 575 576 577
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
578
	ceph_pagelist_append(pagelist, class, size);
579 580 581 582 583 584
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
585
	ceph_pagelist_append(pagelist, method, size);
586 587
	payload_len += size;

588
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
589

590 591
	op->cls.argc = 0;	/* currently unused */

592
	op->indata_len = payload_len;
593 594
}
EXPORT_SYMBOL(osd_req_op_cls_init);
595

596 597 598 599
int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
			  u16 opcode, const char *name, const void *value,
			  size_t size, u8 cmp_op, u8 cmp_mode)
{
600 601
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624
	struct ceph_pagelist *pagelist;
	size_t payload_len;

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

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

	ceph_pagelist_init(pagelist);

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

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

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

	ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
625
	op->indata_len = payload_len;
626 627 628 629
	return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);

630 631
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
632 633
				u64 cookie, u64 version, int flag)
{
634 635
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
636

637
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
638 639

	op->watch.cookie = cookie;
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	op->watch.ver = version;
641
	if (opcode == CEPH_OSD_OP_WATCH && flag)
642
		op->watch.flag = (u8)1;
643 644 645
}
EXPORT_SYMBOL(osd_req_op_watch_init);

646 647 648 649 650 651
void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
				unsigned int which,
				u64 expected_object_size,
				u64 expected_write_size)
{
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
652 653
						      CEPH_OSD_OP_SETALLOCHINT,
						      0);
654 655 656 657 658 659 660 661 662 663 664 665 666

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

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

667
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
668 669 670 671 672 673 674
				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)
675
			ceph_msg_data_add_pages(msg, osd_data->pages,
676 677 678
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
679
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
680 681
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
682
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
683 684 685 686 687 688
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

689
static u64 osd_req_encode_op(struct ceph_osd_request *req,
690
			      struct ceph_osd_op *dst, unsigned int which)
691
{
692
	struct ceph_osd_req_op *src;
693
	struct ceph_osd_data *osd_data;
694
	u64 request_data_len = 0;
695
	u64 data_length;
696

697 698
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
699 700 701 702 703 704 705 706
	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);
709 710 711
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
712
	case CEPH_OSD_OP_WRITEFULL:
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	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_TRUNCATE:
715 716
		if (src->op == CEPH_OSD_OP_WRITE ||
		    src->op == CEPH_OSD_OP_WRITEFULL)
717
			request_data_len = src->extent.length;
718 719 720 721 722 723
		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);
724
		osd_data = &src->extent.osd_data;
725 726
		if (src->op == CEPH_OSD_OP_WRITE ||
		    src->op == CEPH_OSD_OP_WRITEFULL)
727
			ceph_osdc_msg_data_add(req->r_request, osd_data);
728
		else
729
			ceph_osdc_msg_data_add(req->r_reply, osd_data);
730 731 732 733
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
734 735 736 737 738 739 740 741 742 743 744
		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);
745
			src->indata_len += data_length;
746 747 748 749
			request_data_len += data_length;
		}
		osd_data = &src->cls.response_data;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
750 751 752 753 754 755 756 757 758
		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;
759 760 761 762 763 764
	case CEPH_OSD_OP_SETALLOCHINT:
		dst->alloc_hint.expected_object_size =
		    cpu_to_le64(src->alloc_hint.expected_object_size);
		dst->alloc_hint.expected_write_size =
		    cpu_to_le64(src->alloc_hint.expected_write_size);
		break;
765 766 767 768 769 770 771 772 773 774
	case CEPH_OSD_OP_SETXATTR:
	case CEPH_OSD_OP_CMPXATTR:
		dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
		dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
		dst->xattr.cmp_op = src->xattr.cmp_op;
		dst->xattr.cmp_mode = src->xattr.cmp_mode;
		osd_data = &src->xattr.osd_data;
		ceph_osdc_msg_data_add(req->r_request, osd_data);
		request_data_len = osd_data->pagelist->length;
		break;
775 776 777
	case CEPH_OSD_OP_CREATE:
	case CEPH_OSD_OP_DELETE:
		break;
778
	default:
779
		pr_err("unsupported osd opcode %s\n",
780
			ceph_osd_op_name(src->op));
781
		WARN_ON(1);
782 783

		return 0;
784
	}
785

786
	dst->op = cpu_to_le16(src->op);
787
	dst->flags = cpu_to_le32(src->flags);
788
	dst->payload_len = cpu_to_le32(src->indata_len);
789

790
	return request_data_len;
791 792
}

793 794 795 796 797 798 799 800 801 802 803 804 805 806
/*
 * 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,
807 808
					       u64 off, u64 *plen,
					       unsigned int which, int num_ops,
809 810 811 812
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
813
					       bool use_mempool)
814
{
815
	struct ceph_osd_request *req;
816 817 818
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
819
	int r;
820

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	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
822 823
	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
824

825
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
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826
					GFP_NOFS);
827
	if (!req)
828
		return ERR_PTR(-ENOMEM);
829

830
	req->r_flags = flags;
831 832

	/* calculate max write size */
833
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
834 835
	if (r < 0) {
		ceph_osdc_put_request(req);
836
		return ERR_PTR(r);
837
	}
838

839
	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
840
		osd_req_op_init(req, which, opcode, 0);
841 842 843 844 845 846 847 848 849 850 851
	} else {
		u32 object_size = le32_to_cpu(layout->fl_object_size);
		u32 object_base = off - objoff;
		if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
			if (truncate_size <= object_base) {
				truncate_size = 0;
			} else {
				truncate_size -= object_base;
				if (truncate_size > object_size)
					truncate_size = object_size;
			}
852
		}
853
		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
854 855
				       truncate_size, truncate_seq);
	}
856

857
	req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
858

859
	snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
860
		 "%llx.%08llx", vino.ino, objnum);
861
	req->r_base_oid.name_len = strlen(req->r_base_oid.name);
862

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863 864
	return req;
}
865
EXPORT_SYMBOL(ceph_osdc_new_request);
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866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931

/*
 * 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;
}

932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962
static void __kick_linger_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_osd *osd = req->r_osd;

	/*
	 * Linger requests need to be resent with a new tid to avoid
	 * the dup op detection logic on the OSDs.  Achieve this with
	 * a re-register dance instead of open-coding.
	 */
	ceph_osdc_get_request(req);
	if (!list_empty(&req->r_linger_item))
		__unregister_linger_request(osdc, req);
	else
		__unregister_request(osdc, req);
	__register_request(osdc, req);
	ceph_osdc_put_request(req);

	/*
	 * Unless request has been registered as both normal and
	 * lingering, __unregister{,_linger}_request clears r_osd.
	 * However, here we need to preserve r_osd to make sure we
	 * requeue on the same OSD.
	 */
	WARN_ON(req->r_osd || !osd);
	req->r_osd = osd;

	dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
	__enqueue_request(req);
}

963 964 965 966 967 968
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
969
	struct ceph_osd_request *req, *nreq;
970
	LIST_HEAD(resend);
971
	LIST_HEAD(resend_linger);
972 973
	int err;

974
	dout("%s osd%d\n", __func__, osd->o_osd);
975
	err = __reset_osd(osdc, osd);
976
	if (err)
977
		return;
978

979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
	/*
	 * 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.
	 */
996
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
997 998
		if (!req->r_sent)
			break;
999 1000 1001 1002 1003

		if (!req->r_linger) {
			dout("%s requeueing %p tid %llu\n", __func__, req,
			     req->r_tid);
			list_move_tail(&req->r_req_lru_item, &resend);
1004
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
1005 1006 1007
		} else {
			list_move_tail(&req->r_req_lru_item, &resend_linger);
		}
1008
	}
1009
	list_splice(&resend, &osdc->req_unsent);
1010

1011
	/*
1012 1013 1014 1015
	 * Both registered and not yet registered linger requests are
	 * enqueued with a new tid on the same OSD.  We add/move them
	 * to req_unsent/o_requests at the end to keep things in tid
	 * order.
1016
	 */
1017
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
1018
				 r_linger_osd_item) {
1019 1020
		WARN_ON(!list_empty(&req->r_req_lru_item));
		__kick_linger_request(req);
1021
	}
1022 1023 1024

	list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
		__kick_linger_request(req);
1025 1026
}

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1027
/*
1028
 * If the osd connection drops, we need to resubmit all requests.
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1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039
 */
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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1040 1041
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
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	__send_queued(osdc);
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1043
	mutex_unlock(&osdc->request_mutex);
S
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1044 1045 1046 1047 1048 1049
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
1050
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
1051 1052 1053 1054 1055 1056 1057 1058 1059
{
	struct ceph_osd *osd;

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

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
1060
	osd->o_osd = onum;
1061
	RB_CLEAR_NODE(&osd->o_node);
S
Sage Weil 已提交
1062
	INIT_LIST_HEAD(&osd->o_requests);
1063
	INIT_LIST_HEAD(&osd->o_linger_requests);
1064
	INIT_LIST_HEAD(&osd->o_osd_lru);
S
Sage Weil 已提交
1065 1066
	osd->o_incarnation = 1;

1067
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1068

1069
	INIT_LIST_HEAD(&osd->o_keepalive_item);
S
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1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
	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);
1089
	if (atomic_dec_and_test(&osd->o_ref)) {
S
Sage Weil 已提交
1090 1091
		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

1092 1093
		if (osd->o_auth.authorizer)
			ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
S
Sage Weil 已提交
1094
		kfree(osd);
S
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1095
	}
S
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1096 1097 1098 1099 1100
}

/*
 * remove an osd from our map
 */
1101
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1102
{
1103
	dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1104 1105
	WARN_ON(!list_empty(&osd->o_requests));
	WARN_ON(!list_empty(&osd->o_linger_requests));
1106

1107
	list_del_init(&osd->o_osd_lru);
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
	rb_erase(&osd->o_node, &osdc->osds);
	RB_CLEAR_NODE(&osd->o_node);
}

static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
{
	dout("%s %p osd%d\n", __func__, osd, osd->o_osd);

	if (!RB_EMPTY_NODE(&osd->o_node)) {
		ceph_con_close(&osd->o_con);
		__remove_osd(osdc, osd);
		put_osd(osd);
	}
S
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1121 1122
}

1123 1124
static void remove_all_osds(struct ceph_osd_client *osdc)
{
1125
	dout("%s %p\n", __func__, osdc);
1126 1127 1128 1129
	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);
1130
		remove_osd(osdc, osd);
1131 1132 1133 1134
	}
	mutex_unlock(&osdc->request_mutex);
}

1135 1136 1137
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
			      struct ceph_osd *osd)
{
1138
	dout("%s %p\n", __func__, osd);
1139
	BUG_ON(!list_empty(&osd->o_osd_lru));
1140

1141
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1142
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1143 1144
}

1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc,
				  struct ceph_osd *osd)
{
	dout("%s %p\n", __func__, osd);

	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests))
		__move_osd_to_lru(osdc, osd);
}

1155 1156 1157 1158 1159 1160 1161
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);
}

1162
static void remove_old_osds(struct ceph_osd_client *osdc)
1163 1164 1165 1166 1167 1168
{
	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) {
1169
		if (time_before(jiffies, osd->lru_ttl))
1170
			break;
1171
		remove_osd(osdc, osd);
1172 1173 1174 1175
	}
	mutex_unlock(&osdc->request_mutex);
}

S
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1176 1177 1178
/*
 * reset osd connect
 */
1179
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1180
{
A
Alex Elder 已提交
1181
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1182

1183
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1184 1185
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1186
		remove_osd(osdc, osd);
A
Alex Elder 已提交
1187 1188 1189 1190 1191 1192 1193 1194
		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;

1195 1196
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1197 1198 1199
		/* touch each r_stamp for handle_timeout()'s benfit */
		list_for_each_entry(req, &osd->o_requests, r_osd_item)
			req->r_stamp = jiffies;
A
Alex Elder 已提交
1200 1201

		return -EAGAIN;
S
Sage Weil 已提交
1202
	}
A
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1203 1204 1205 1206 1207 1208

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

	return 0;
S
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1209 1210 1211 1212 1213 1214 1215 1216
}

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;

1217
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
S
Sage Weil 已提交
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249
	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;
}

1250 1251 1252
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1253
			      osdc->client->options->osd_keepalive_timeout);
1254 1255 1256 1257 1258 1259
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
Sage Weil 已提交
1260 1261 1262 1263 1264

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1265 1266
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1267 1268
{
	req->r_tid = ++osdc->last_tid;
1269
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1270
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
Sage Weil 已提交
1271 1272 1273 1274
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1275 1276
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1277
	}
1278 1279
}

S
Sage Weil 已提交
1280 1281 1282 1283 1284 1285
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1286 1287 1288 1289 1290 1291
	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
1292 1293
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
1294
	RB_CLEAR_NODE(&req->r_node);
S
Sage Weil 已提交
1295 1296
	osdc->num_requests--;

1297 1298
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1299
		ceph_msg_revoke(req->r_request);
1300 1301

		list_del_init(&req->r_osd_item);
1302
		maybe_move_osd_to_lru(osdc, req->r_osd);
1303
		if (list_empty(&req->r_linger_osd_item))
1304
			req->r_osd = NULL;
1305
	}
S
Sage Weil 已提交
1306

A
Alex Elder 已提交
1307
	list_del_init(&req->r_req_lru_item);
S
Sage Weil 已提交
1308 1309
	ceph_osdc_put_request(req);

1310 1311 1312
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1313 1314 1315 1316 1317 1318 1319 1320
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1321
	if (req->r_sent && req->r_osd) {
1322
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1323 1324 1325 1326
		req->r_sent = 0;
	}
}

1327 1328 1329
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
1330 1331 1332
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
	WARN_ON(!req->r_linger);

1333
	ceph_osdc_get_request(req);
1334
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1335
	if (req->r_osd)
1336
		list_add_tail(&req->r_linger_osd_item,
1337
			      &req->r_osd->o_linger_requests);
1338 1339 1340 1341 1342
}

static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req)
{
1343 1344 1345 1346 1347 1348 1349 1350 1351
	WARN_ON(!req->r_linger);

	if (list_empty(&req->r_linger_item)) {
		dout("%s %p tid %llu not registered\n", __func__, req,
		     req->r_tid);
		return;
	}

	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
A
Alex Elder 已提交
1352
	list_del_init(&req->r_linger_item);
1353

1354
	if (req->r_osd) {
1355
		list_del_init(&req->r_linger_osd_item);
1356
		maybe_move_osd_to_lru(osdc, req->r_osd);
1357 1358
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1359
	}
1360
	ceph_osdc_put_request(req);
1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372
}

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;
	}
}
EXPORT_SYMBOL(ceph_osdc_set_request_linger);

1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388
/*
 * Returns whether a request should be blocked from being sent
 * based on the current osdmap and osd_client settings.
 *
 * Caller should hold map_sem for read.
 */
static bool __req_should_be_paused(struct ceph_osd_client *osdc,
				   struct ceph_osd_request *req)
{
	bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
	bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
		ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
	return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
		(req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
}

1389 1390 1391 1392 1393 1394 1395
/*
 * Calculate mapping of a request to a PG.  Takes tiering into account.
 */
static int __calc_request_pg(struct ceph_osdmap *osdmap,
			     struct ceph_osd_request *req,
			     struct ceph_pg *pg_out)
{
1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
	bool need_check_tiering;

	need_check_tiering = false;
	if (req->r_target_oloc.pool == -1) {
		req->r_target_oloc = req->r_base_oloc; /* struct */
		need_check_tiering = true;
	}
	if (req->r_target_oid.name_len == 0) {
		ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
		need_check_tiering = true;
	}

	if (need_check_tiering &&
	    (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1410 1411
		struct ceph_pg_pool_info *pi;

1412
		pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
1413 1414 1415
		if (pi) {
			if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
			    pi->read_tier >= 0)
1416
				req->r_target_oloc.pool = pi->read_tier;
1417 1418
			if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
			    pi->write_tier >= 0)
1419
				req->r_target_oloc.pool = pi->write_tier;
1420 1421 1422 1423
		}
		/* !pi is caught in ceph_oloc_oid_to_pg() */
	}

1424 1425
	return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
				   &req->r_target_oid, pg_out);
1426 1427
}

1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443
static void __enqueue_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;

	dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid,
	     req->r_osd ? req->r_osd->o_osd : -1);

	if (req->r_osd) {
		__remove_osd_from_lru(req->r_osd);
		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
		list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
	} else {
		list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
	}
}

S
Sage Weil 已提交
1444 1445 1446
/*
 * 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
1447
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1448
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1449 1450 1451 1452 1453
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1454
static int __map_request(struct ceph_osd_client *osdc,
1455
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1456
{
1457
	struct ceph_pg pgid;
1458
	int acting[CEPH_PG_MAX_SIZE];
1459
	int num, o;
S
Sage Weil 已提交
1460
	int err;
1461
	bool was_paused;
S
Sage Weil 已提交
1462

1463
	dout("map_request %p tid %lld\n", req, req->r_tid);
1464 1465

	err = __calc_request_pg(osdc->osdmap, req, &pgid);
1466 1467
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1468
		return err;
1469
	}
1470 1471
	req->r_pgid = pgid;

1472 1473 1474
	num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
	if (num < 0)
		num = 0;
S
Sage Weil 已提交
1475

1476 1477 1478 1479 1480
	was_paused = req->r_paused;
	req->r_paused = __req_should_be_paused(osdc, req);
	if (was_paused && !req->r_paused)
		force_resend = 1;

1481 1482
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1483 1484 1485
	     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) ||
1486 1487
	    (req->r_osd == NULL && o == -1) ||
	    req->r_paused)
S
Sage Weil 已提交
1488 1489
		return 0;  /* no change */

1490 1491
	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
1492 1493
	     req->r_osd ? req->r_osd->o_osd : -1);

1494 1495 1496 1497
	/* 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
1498 1499 1500
	if (req->r_osd) {
		__cancel_request(req);
		list_del_init(&req->r_osd_item);
1501
		list_del_init(&req->r_linger_osd_item);
S
Sage Weil 已提交
1502 1503 1504 1505 1506
		req->r_osd = NULL;
	}

	req->r_osd = __lookup_osd(osdc, o);
	if (!req->r_osd && o >= 0) {
1507
		err = -ENOMEM;
1508
		req->r_osd = create_osd(osdc, o);
1509 1510
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1511
			goto out;
1512
		}
S
Sage Weil 已提交
1513

1514
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1515 1516
		__insert_osd(osdc, req->r_osd);

1517 1518 1519
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1520 1521
	}

1522
	__enqueue_request(req);
1523
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1524 1525 1526 1527 1528 1529 1530 1531

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1532 1533
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1534
{
1535
	void *p;
S
Sage Weil 已提交
1536

1537 1538 1539 1540 1541 1542 1543
	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);
1544
	put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1545 1546 1547 1548 1549 1550
	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));
1551

S
Sage Weil 已提交
1552
	req->r_stamp = jiffies;
1553
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1554 1555

	ceph_msg_get(req->r_request); /* send consumes a ref */
1556

S
Sage Weil 已提交
1557
	req->r_sent = req->r_osd->o_incarnation;
1558 1559

	ceph_con_send(&req->r_osd->o_con, req->r_request);
S
Sage Weil 已提交
1560 1561
}

1562 1563 1564
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1565
static void __send_queued(struct ceph_osd_client *osdc)
1566 1567 1568
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1569 1570
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1571 1572 1573
		__send_request(osdc, req);
}

1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
/*
 * Caller should hold map_sem for read and request_mutex.
 */
static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
				     struct ceph_osd_request *req,
				     bool nofail)
{
	int rc;

	__register_request(osdc, req);
	req->r_sent = 0;
	req->r_got_reply = 0;
	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;
		} else {
			__unregister_request(osdc, req);
		}
		return rc;
	}

	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 {
		__send_queued(osdc);
	}

	return 0;
}

S
Sage Weil 已提交
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620
/*
 * 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);
1621
	struct ceph_options *opts = osdc->client->options;
S
Sage Weil 已提交
1622
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1623
	struct ceph_osd *osd;
1624
	struct list_head slow_osds;
S
Sage Weil 已提交
1625 1626 1627 1628 1629 1630 1631
	dout("timeout\n");
	down_read(&osdc->map_sem);

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

	mutex_lock(&osdc->request_mutex);

1632 1633 1634 1635 1636 1637 1638
	/*
	 * 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) {
1639 1640
		if (time_before(jiffies,
				req->r_stamp + opts->osd_keepalive_timeout))
1641 1642 1643 1644 1645
			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
1646
		     req->r_tid, osd->o_osd);
1647 1648 1649 1650 1651 1652
		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
1653 1654 1655
		ceph_con_keepalive(&osd->o_con);
	}

1656
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1657
	__send_queued(osdc);
S
Sage Weil 已提交
1658 1659 1660 1661
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1662 1663 1664 1665 1666
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);
1667
	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
1668 1669 1670

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1671
	remove_old_osds(osdc);
1672 1673 1674 1675 1676 1677
	up_read(&osdc->map_sem);

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

1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780
static int ceph_oloc_decode(void **p, void *end,
			    struct ceph_object_locator *oloc)
{
	u8 struct_v, struct_cv;
	u32 len;
	void *struct_end;
	int ret = 0;

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

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

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

	if (struct_v >= 5) {
		len = ceph_decode_32(p);
		if (len > 0) {
			pr_warn("ceph_object_locator::nspace is set\n");
			goto e_inval;
		}
	}

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

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

e_inval:
	ret = -EINVAL;
	goto out;
}

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

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

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

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

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

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

e_inval:
	ret = -EINVAL;
	goto out;
}

S
Sage Weil 已提交
1781 1782 1783 1784 1785
static void complete_request(struct ceph_osd_request *req)
{
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1786 1787 1788 1789
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1790
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
S
Sage Weil 已提交
1791
{
1792
	void *p, *end;
S
Sage Weil 已提交
1793
	struct ceph_osd_request *req;
1794
	struct ceph_request_redirect redir;
S
Sage Weil 已提交
1795
	u64 tid;
1796
	int object_len;
1797 1798
	unsigned int numops;
	int payload_len, flags;
1799
	s32 result;
1800 1801 1802 1803 1804 1805
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1806
	int already_completed;
1807
	u32 bytes;
I
Ilya Dryomov 已提交
1808
	u8 decode_redir;
1809
	unsigned int i;
S
Sage Weil 已提交
1810

1811
	tid = le64_to_cpu(msg->hdr.tid);
1812 1813 1814 1815 1816 1817 1818 1819 1820 1821
	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;

1822
	err = ceph_decode_pgid(&p, end, &pg);
1823
	if (err)
S
Sage Weil 已提交
1824
		goto bad;
1825 1826 1827 1828 1829 1830 1831 1832

	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
1833
	/* lookup */
1834
	down_read(&osdc->map_sem);
S
Sage Weil 已提交
1835 1836 1837 1838
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1839
		goto bad_mutex;
S
Sage Weil 已提交
1840 1841
	}
	ceph_osdc_get_request(req);
1842 1843 1844 1845

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

1846
	ceph_decode_need(&p, end, 4, bad_put);
1847
	numops = ceph_decode_32(&p);
1848
	if (numops > CEPH_OSD_MAX_OPS)
1849 1850 1851 1852
		goto bad_put;
	if (numops != req->r_num_ops)
		goto bad_put;
	payload_len = 0;
1853
	ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1854 1855 1856 1857 1858
	for (i = 0; i < numops; i++) {
		struct ceph_osd_op *op = p;
		int len;

		len = le32_to_cpu(op->payload_len);
1859
		req->r_ops[i].outdata_len = len;
1860 1861 1862 1863
		dout(" op %d has %d bytes\n", i, len);
		payload_len += len;
		p += sizeof(*op);
	}
1864 1865
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1866 1867
		pr_warn("sum of op payload lens %d != data_len %d\n",
			payload_len, bytes);
1868 1869 1870
		goto bad_put;
	}

1871
	ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1872 1873
	retry_attempt = ceph_decode_32(&p);
	for (i = 0; i < numops; i++)
1874
		req->r_ops[i].rval = ceph_decode_32(&p);
S
Sage Weil 已提交
1875

1876 1877 1878
	if (le16_to_cpu(msg->hdr.version) >= 6) {
		p += 8 + 4; /* skip replay_version */
		p += 8; /* skip user_version */
Y
Yan, Zheng 已提交
1879

I
Ilya Dryomov 已提交
1880 1881 1882 1883 1884 1885 1886 1887 1888
		if (le16_to_cpu(msg->hdr.version) >= 7)
			ceph_decode_8_safe(&p, end, decode_redir, bad_put);
		else
			decode_redir = 1;
	} else {
		decode_redir = 0;
	}

	if (decode_redir) {
1889 1890 1891 1892 1893 1894
		err = ceph_redirect_decode(&p, end, &redir);
		if (err)
			goto bad_put;
	} else {
		redir.oloc.pool = -1;
	}
S
Sage Weil 已提交
1895

1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910
	if (redir.oloc.pool != -1) {
		dout("redirect pool %lld\n", redir.oloc.pool);

		__unregister_request(osdc, req);

		req->r_target_oloc = redir.oloc; /* struct */

		/*
		 * Start redirect requests with nofail=true.  If
		 * mapping fails, request will end up on the notarget
		 * list, waiting for the new osdmap (which can take
		 * a while), even though the original request mapped
		 * successfully.  In the future we might want to follow
		 * original request's nofail setting here.
		 */
1911
		err = __ceph_osdc_start_request(osdc, req, true);
1912 1913
		BUG_ON(err);

1914
		goto out_unlock;
1915 1916 1917 1918
	}

	already_completed = req->r_got_reply;
	if (!req->r_got_reply) {
1919
		req->r_result = result;
S
Sage Weil 已提交
1920 1921 1922 1923 1924 1925
		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, */
1926 1927
		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
1928 1929 1930 1931

		req->r_got_reply = 1;
	} else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
		dout("handle_reply tid %llu dup ack\n", tid);
1932
		goto out_unlock;
S
Sage Weil 已提交
1933 1934 1935 1936
	}

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

1937 1938 1939
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1940
	/* either this is a read, or we got the safe response */
1941 1942
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1943 1944 1945 1946
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

	mutex_unlock(&osdc->request_mutex);
1947
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
1948

Y
Yan, Zheng 已提交
1949
	if (!already_completed) {
1950 1951 1952
		if (req->r_unsafe_callback &&
		    result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
			req->r_unsafe_callback(req, true);
Y
Yan, Zheng 已提交
1953 1954 1955 1956 1957
		if (req->r_callback)
			req->r_callback(req, msg);
		else
			complete_all(&req->r_completion);
	}
S
Sage Weil 已提交
1958

1959 1960 1961
	if (flags & CEPH_OSD_FLAG_ONDISK) {
		if (req->r_unsafe_callback && already_completed)
			req->r_unsafe_callback(req, false);
S
Sage Weil 已提交
1962
		complete_request(req);
1963
	}
S
Sage Weil 已提交
1964

1965
out:
1966
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
Sage Weil 已提交
1967 1968
	ceph_osdc_put_request(req);
	return;
1969 1970 1971 1972
out_unlock:
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	goto out;
S
Sage Weil 已提交
1973

1974
bad_put:
1975 1976 1977 1978 1979 1980 1981
	req->r_result = -EIO;
	__unregister_request(osdc, req);
	if (req->r_callback)
		req->r_callback(req, msg);
	else
		complete_all(&req->r_completion);
	complete_request(req);
1982
	ceph_osdc_put_request(req);
1983 1984
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
1985
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
1986
bad:
1987 1988
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1989
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1990 1991
}

1992
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
1993 1994 1995
{
	struct rb_node *p, *n;

1996
	dout("%s %p\n", __func__, osdc);
1997 1998
	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
1999

2000 2001 2002 2003 2004 2005 2006
		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
2007
	}
2008 2009 2010
}

/*
2011 2012
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
2013
 *
2014
 * Caller should hold map_sem for read.
2015
 */
2016 2017
static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
			  bool force_resend_writes)
2018
{
2019
	struct ceph_osd_request *req, *nreq;
2020 2021 2022
	struct rb_node *p;
	int needmap = 0;
	int err;
2023
	bool force_resend_req;
2024

2025 2026
	dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
		force_resend_writes ? " (force resend writes)" : "");
2027
	mutex_lock(&osdc->request_mutex);
2028
	for (p = rb_first(&osdc->requests); p; ) {
2029
		req = rb_entry(p, struct ceph_osd_request, r_node);
2030
		p = rb_next(p);
2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043

		/*
		 * 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);
2044
			ceph_osdc_get_request(req);
2045 2046
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
2047
			ceph_osdc_put_request(req);
2048 2049 2050
			continue;
		}

2051 2052 2053 2054
		force_resend_req = force_resend ||
			(force_resend_writes &&
				req->r_flags & CEPH_OSD_FLAG_WRITE);
		err = __map_request(osdc, req, force_resend_req);
2055 2056 2057 2058 2059 2060
		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) {
2061 2062 2063 2064
			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);
2065
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
2066 2067
			}
		}
2068 2069 2070 2071 2072 2073
	}

	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);

2074 2075
		err = __map_request(osdc, req,
				    force_resend || force_resend_writes);
2076
		dout("__map_request returned %d\n", err);
2077 2078
		if (err < 0)
			continue;  /* hrm! */
2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093
		if (req->r_osd == NULL || err > 0) {
			if (req->r_osd == NULL) {
				dout("lingering %p tid %llu maps to no osd\n",
				     req, req->r_tid);
				/*
				 * A homeless lingering request makes
				 * no sense, as it's job is to keep
				 * a particular OSD connection open.
				 * Request a newer map and kick the
				 * request, knowing that it won't be
				 * resent until we actually get a map
				 * that can tell us where to send it.
				 */
				needmap++;
			}
2094

2095 2096 2097 2098 2099
			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);
			__unregister_linger_request(osdc, req);
		}
2100
	}
2101
	reset_changed_osds(osdc);
S
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2102 2103 2104 2105 2106 2107
	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);
	}
2108
}
2109 2110


S
Sage Weil 已提交
2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125
/*
 * 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;
2126
	bool was_full;
S
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2127 2128 2129 2130 2131 2132 2133 2134

	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));
2135 2136
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
2137 2138 2139

	down_write(&osdc->map_sem);

2140 2141
	was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);

S
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2142 2143 2144 2145 2146
	/* 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);
2147 2148
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
2149 2150 2151 2152 2153 2154 2155
		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,
2156
							  &osdc->client->msgr);
S
Sage Weil 已提交
2157 2158 2159 2160
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2161
			BUG_ON(!newmap);
S
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2162 2163 2164 2165
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
2166 2167 2168 2169
			was_full = was_full ||
				ceph_osdmap_flag(osdc->osdmap,
						 CEPH_OSDMAP_FULL);
			kick_requests(osdc, 0, was_full);
S
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2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184
		} 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);
2185 2186
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
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2187 2188 2189 2190 2191 2192 2193 2194 2195
		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 {
2196 2197
			int skipped_map = 0;

S
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2198
			dout("taking full map %u len %d\n", epoch, maplen);
2199
			newmap = ceph_osdmap_decode(&p, p+maplen);
S
Sage Weil 已提交
2200 2201 2202 2203
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2204
			BUG_ON(!newmap);
S
Sage Weil 已提交
2205 2206
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
2207 2208 2209
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
2210
				ceph_osdmap_destroy(oldmap);
2211
			}
2212 2213 2214 2215
			was_full = was_full ||
				ceph_osdmap_flag(osdc->osdmap,
						 CEPH_OSDMAP_FULL);
			kick_requests(osdc, skipped_map, was_full);
S
Sage Weil 已提交
2216 2217 2218 2219 2220
		}
		p += maplen;
		nr_maps--;
	}

2221 2222
	if (!osdc->osdmap)
		goto bad;
S
Sage Weil 已提交
2223 2224
done:
	downgrade_write(&osdc->map_sem);
2225 2226
	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			  osdc->osdmap->epoch);
2227 2228 2229 2230 2231 2232

	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
2233 2234 2235
	if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) ||
		ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
		ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
2236 2237
		ceph_monc_request_next_osdmap(&osdc->client->monc);

A
Alex Elder 已提交
2238 2239 2240
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2241
	up_read(&osdc->map_sem);
2242
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
2243 2244 2245 2246
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
2247
	ceph_msg_dump(msg);
S
Sage Weil 已提交
2248 2249 2250
	up_write(&osdc->map_sem);
}

2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332
/*
 * 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 *),
2333
			   void *data, struct ceph_osd_event **pevent)
2334 2335 2336 2337 2338 2339 2340 2341 2342
{
	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;
2343
	event->one_shot = 0;
2344 2345 2346
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
2347
	RB_CLEAR_NODE(&event->node);
2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393
	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
 */
2394 2395
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415
{
	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) {
2416
		BUG_ON(event->one_shot);
2417 2418 2419 2420 2421 2422 2423 2424
		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) {
2425 2426 2427
			pr_err("couldn't allocate event_work\n");
			ceph_osdc_put_event(event);
			return;
2428
		}
2429
		INIT_WORK(&event_work->work, do_event_work);
2430 2431 2432 2433 2434
		event_work->event = event;
		event_work->ver = ver;
		event_work->notify_id = notify_id;
		event_work->opcode = opcode;

2435 2436
		queue_work(osdc->notify_wq, &event_work->work);
	}
2437 2438 2439 2440 2441 2442 2443

	return;

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

2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491
/*
 * 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 */
2492 2493 2494 2495 2496
	ceph_encode_32(&p, req->r_base_oid.name_len);
	memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
	dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
	     req->r_base_oid.name, req->r_base_oid.name_len);
	p += req->r_base_oid.name_len;
2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542

	/* 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);

2543 2544 2545 2546 2547 2548 2549
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
2550
	int rc;
2551

S
Sage Weil 已提交
2552 2553
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2554 2555 2556

	rc = __ceph_osdc_start_request(osdc, req, nofail);

S
Sage Weil 已提交
2557 2558
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
2559

S
Sage Weil 已提交
2560 2561
	return rc;
}
2562
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2563

2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582
/*
 * Unregister a registered request.  The request is not completed (i.e.
 * no callbacks or wakeups) - higher layers are supposed to know what
 * they are canceling.
 */
void ceph_osdc_cancel_request(struct ceph_osd_request *req)
{
	struct ceph_osd_client *osdc = req->r_osdc;

	mutex_lock(&osdc->request_mutex);
	if (req->r_linger)
		__unregister_linger_request(osdc, req);
	__unregister_request(osdc, req);
	mutex_unlock(&osdc->request_mutex);

	dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid);
}
EXPORT_SYMBOL(ceph_osdc_cancel_request);

S
Sage Weil 已提交
2583 2584 2585 2586 2587 2588 2589 2590
/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	int rc;

2591 2592
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);

S
Sage Weil 已提交
2593 2594
	rc = wait_for_completion_interruptible(&req->r_completion);
	if (rc < 0) {
2595 2596
		dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
		ceph_osdc_cancel_request(req);
S
Sage Weil 已提交
2597
		complete_request(req);
S
Sage Weil 已提交
2598 2599 2600
		return rc;
	}

2601 2602
	dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
	     req->r_result);
S
Sage Weil 已提交
2603 2604
	return req->r_result;
}
2605
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638

/*
 * 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);
}
2639
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2640

2641 2642 2643 2644
/*
 * Call all pending notify callbacks - for use after a watch is
 * unregistered, to make sure no more callbacks for it will be invoked
 */
S
stephen hemminger 已提交
2645
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2646 2647 2648 2649 2650 2651
{
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);


S
Sage Weil 已提交
2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667
/*
 * 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;
2668
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2669
	osdc->requests = RB_ROOT;
2670
	INIT_LIST_HEAD(&osdc->req_lru);
2671 2672
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2673
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2674 2675
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2676
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2677 2678 2679
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2680 2681

	schedule_delayed_work(&osdc->osds_timeout_work,
2682
	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));
S
Sage Weil 已提交
2683

2684
	err = -ENOMEM;
2685 2686
	osdc->req_mempool = mempool_create_slab_pool(10,
						     ceph_osd_request_cache);
S
Sage Weil 已提交
2687
	if (!osdc->req_mempool)
2688
		goto out;
S
Sage Weil 已提交
2689

2690 2691
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2692
				"osd_op");
S
Sage Weil 已提交
2693
	if (err < 0)
2694
		goto out_mempool;
2695
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2696 2697
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2698 2699
	if (err < 0)
		goto out_msgpool;
2700

2701
	err = -ENOMEM;
2702
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2703
	if (!osdc->notify_wq)
2704 2705
		goto out_msgpool_reply;

S
Sage Weil 已提交
2706
	return 0;
2707

2708 2709
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2710 2711
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2712 2713 2714 2715
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2716 2717 2718 2719
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2720 2721
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2722
	cancel_delayed_work_sync(&osdc->timeout_work);
2723
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2724 2725 2726 2727
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2728
	remove_all_osds(osdc);
S
Sage Weil 已提交
2729 2730
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2731
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2732 2733 2734 2735 2736 2737 2738 2739 2740 2741
}

/*
 * 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,
2742
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2743 2744 2745 2746 2747 2748
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2749
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
S
Sage Weil 已提交
2750
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2751
				    NULL, truncate_seq, truncate_size,
2752
				    false);
2753 2754
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2755 2756

	/* it may be a short read due to an object boundary */
2757

2758
	osd_req_op_extent_osd_data_pages(req, 0,
2759
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2760

2761
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2762
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2763

2764
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2765

S
Sage Weil 已提交
2766 2767 2768 2769 2770 2771 2772 2773
	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;
}
2774
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2775 2776 2777 2778 2779 2780 2781 2782 2783 2784

/*
 * 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,
2785
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2786 2787 2788
{
	struct ceph_osd_request *req;
	int rc = 0;
2789
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2790

2791
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2792
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
S
Sage Weil 已提交
2793
				    CEPH_OSD_OP_WRITE,
2794
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2795
				    snapc, truncate_seq, truncate_size,
2796
				    true);
2797 2798
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2799 2800

	/* it may be a short write due to an object boundary */
2801
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2802 2803
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2804

2805
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2806

2807
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2808 2809 2810 2811 2812 2813 2814 2815 2816
	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;
}
2817
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2818

2819 2820
int ceph_osdc_setup(void)
{
2821 2822 2823
	size_t size = sizeof(struct ceph_osd_request) +
	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);

2824
	BUG_ON(ceph_osd_request_cache);
2825 2826
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
						   0, 0, NULL);
2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839

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

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

S
Sage Weil 已提交
2840 2841 2842 2843 2844 2845
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2846
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2847 2848 2849
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2850
		goto out;
2851
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2852 2853 2854 2855 2856 2857

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2858
		handle_reply(osdc, msg);
S
Sage Weil 已提交
2859
		break;
2860 2861 2862
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2863 2864 2865 2866 2867

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2868
out:
S
Sage Weil 已提交
2869 2870 2871
	ceph_msg_put(msg);
}

2872
/*
2873 2874 2875
 * Lookup and return message for incoming reply.  Don't try to do
 * anything about a larger than preallocated data portion of the
 * message at the moment - for now, just skip the message.
2876 2877
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2878 2879
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2880 2881 2882
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2883
	struct ceph_msg *m;
2884
	struct ceph_osd_request *req;
2885
	int front_len = le32_to_cpu(hdr->front_len);
2886
	int data_len = le32_to_cpu(hdr->data_len);
2887
	u64 tid;
S
Sage Weil 已提交
2888

2889 2890 2891 2892
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
2893 2894
		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
		     osd->o_osd, tid);
2895
		m = NULL;
2896
		*skip = 1;
2897 2898
		goto out;
	}
S
Sage Weil 已提交
2899

2900
	ceph_msg_revoke_incoming(req->r_reply);
2901

2902
	if (front_len > req->r_reply->front_alloc_len) {
2903 2904 2905
		pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
			__func__, osd->o_osd, req->r_tid, front_len,
			req->r_reply->front_alloc_len);
2906 2907
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
2908
		if (!m)
S
Sage Weil 已提交
2909 2910 2911 2912
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
2913

2914 2915 2916 2917 2918 2919 2920
	if (data_len > req->r_reply->data_length) {
		pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
			__func__, osd->o_osd, req->r_tid, data_len,
			req->r_reply->data_length);
		m = NULL;
		*skip = 1;
		goto out;
2921
	}
2922 2923

	m = ceph_msg_get(req->r_reply);
S
Sage Weil 已提交
2924
	dout("get_reply tid %lld %p\n", tid, m);
2925 2926 2927

out:
	mutex_unlock(&osdc->request_mutex);
2928
	return m;
2929 2930 2931 2932 2933 2934 2935 2936 2937 2938
}

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
2939
	*skip = 0;
2940 2941
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2942
	case CEPH_MSG_WATCH_NOTIFY:
2943
		return ceph_msg_new(type, front, GFP_NOFS, false);
2944 2945 2946 2947 2948 2949 2950 2951
	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
2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970
}

/*
 * 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);
}

2971 2972 2973
/*
 * authentication
 */
2974 2975 2976 2977 2978
/*
 * 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,
2979
					int *proto, int force_new)
2980 2981 2982 2983
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2984
	struct ceph_auth_handshake *auth = &o->o_auth;
2985

2986
	if (force_new && auth->authorizer) {
2987
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2988 2989
		auth->authorizer = NULL;
	}
2990 2991 2992
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2993
		if (ret)
2994
			return ERR_PTR(ret);
2995 2996
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2997 2998 2999
						     auth);
		if (ret)
			return ERR_PTR(ret);
3000 3001
	}
	*proto = ac->protocol;
3002

3003
	return auth;
3004 3005 3006 3007 3008 3009 3010 3011 3012
}


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;

3013
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
3014 3015
}

3016 3017 3018 3019 3020 3021
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;

3022
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
3023 3024
	return ceph_monc_validate_auth(&osdc->client->monc);
}
3025

3026
static int osd_sign_message(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
3027
{
3028
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
3029
	struct ceph_auth_handshake *auth = &o->o_auth;
3030

Y
Yan, Zheng 已提交
3031 3032 3033
	return ceph_auth_sign_message(auth, msg);
}

3034
static int osd_check_message_signature(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
3035
{
3036
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
3037
	struct ceph_auth_handshake *auth = &o->o_auth;
3038

Y
Yan, Zheng 已提交
3039 3040 3041
	return ceph_auth_check_message_signature(auth, msg);
}

3042
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
3043 3044 3045
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
3046 3047
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
3048
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
3049
	.alloc_msg = alloc_msg,
3050 3051
	.sign_message = osd_sign_message,
	.check_message_signature = osd_check_message_signature,
3052
	.fault = osd_reset,
S
Sage Weil 已提交
3053
};