osd_client.c 81.5 KB
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
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#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
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#include <linux/ceph/libceph.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
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#define OSD_OPREPLY_FRONT_LEN	512
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static struct kmem_cache	*ceph_osd_request_cache;

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static const struct ceph_connection_operations osd_con_ops;
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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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/*
 * 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);

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

	osd_data = osd_req_op_raw_data_in(osd_req, which);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);

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

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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);

void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
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			unsigned int which, struct ceph_pagelist *pagelist)
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{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);

#ifdef CONFIG_BLOCK
void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
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			unsigned int which, struct bio *bio, size_t bio_length)
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{
	struct ceph_osd_data *osd_data;
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	osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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	ceph_osd_data_bio_init(osd_data, bio, bio_length);
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
#endif /* CONFIG_BLOCK */

static void osd_req_op_cls_request_info_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, cls, request_info);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
}

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void osd_req_op_cls_request_data_pagelist(
			struct ceph_osd_request *osd_req,
			unsigned int which, struct ceph_pagelist *pagelist)
{
	struct ceph_osd_data *osd_data;

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	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
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	osd_req->r_ops[which].cls.indata_len += pagelist->length;
	osd_req->r_ops[which].indata_len += pagelist->length;
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}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);

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

	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
	ceph_osd_data_pages_init(osd_data, pages, length, alignment,
				pages_from_pool, own_pages);
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	osd_req->r_ops[which].cls.indata_len += length;
	osd_req->r_ops[which].indata_len += length;
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}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);

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

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

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

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

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

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

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

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

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/*
 * Assumes @t is zero-initialized.
 */
static void target_init(struct ceph_osd_request_target *t)
{
	ceph_oid_init(&t->base_oid);
	ceph_oloc_init(&t->base_oloc);
	ceph_oid_init(&t->target_oid);
	ceph_oloc_init(&t->target_oloc);

	ceph_osds_init(&t->acting);
	ceph_osds_init(&t->up);
	t->size = -1;
	t->min_size = -1;

	t->osd = CEPH_HOMELESS_OSD;
}

static void target_destroy(struct ceph_osd_request_target *t)
{
	ceph_oid_destroy(&t->base_oid);
	ceph_oid_destroy(&t->target_oid);
}

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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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	target_destroy(&req->r_t);
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	ceph_put_snap_context(req->r_snapc);
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	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
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	else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
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		kmem_cache_free(ceph_osd_request_cache, req);
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	else
		kfree(req);
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}
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void ceph_osdc_get_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
	     atomic_read(&req->r_kref.refcount));
	kref_get(&req->r_kref);
}
EXPORT_SYMBOL(ceph_osdc_get_request);

void ceph_osdc_put_request(struct ceph_osd_request *req)
{
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	if (req) {
		dout("%s %p (was %d)\n", __func__, req,
		     atomic_read(&req->r_kref.refcount));
		kref_put(&req->r_kref, ceph_osdc_release_request);
	}
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}
EXPORT_SYMBOL(ceph_osdc_put_request);
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struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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					       struct ceph_snap_context *snapc,
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					       unsigned int num_ops,
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					       bool use_mempool,
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					       gfp_t gfp_flags)
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{
	struct ceph_osd_request *req;
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	if (use_mempool) {
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		BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
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		req = mempool_alloc(osdc->req_mempool, gfp_flags);
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	} else if (num_ops <= CEPH_OSD_SLAB_OPS) {
		req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
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	} else {
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		BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
		req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
			      gfp_flags);
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	}
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	if (unlikely(!req))
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		return NULL;
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	/* 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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	req->r_snapid = CEPH_NOSNAP;
	req->r_snapc = ceph_get_snap_context(snapc);
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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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	target_init(&req->r_t);
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	dout("%s req %p\n", __func__, req);
	return req;
}
EXPORT_SYMBOL(ceph_osdc_alloc_request);
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int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
{
	struct ceph_osd_client *osdc = req->r_osdc;
	struct ceph_msg *msg;
	int msg_size;
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	WARN_ON(ceph_oid_empty(&req->r_base_oid));

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	/* create request message */
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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 */
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	msg_size += 4 + req->r_base_oid.name_len; /* oid */
	msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
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	msg_size += 8; /* snapid */
	msg_size += 8; /* snap_seq */
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	msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
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	msg_size += 4; /* retry_attempt */

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	if (req->r_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, true);
	if (!msg)
		return -ENOMEM;
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	memset(msg->front.iov_base, 0, msg->front.iov_len);
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	req->r_request = msg;

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	/* create reply message */
	msg_size = OSD_OPREPLY_FRONT_LEN;
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	msg_size += req->r_base_oid.name_len;
	msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
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	if (req->r_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
	if (!msg)
		return -ENOMEM;

	req->r_reply = msg;

	return 0;
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}
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EXPORT_SYMBOL(ceph_osdc_alloc_messages);
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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)
{
524 525
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
526 527
	size_t payload_len = 0;

L
Li Wang 已提交
528
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
529 530
	       opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
531 532 533 534 535

	op->extent.offset = offset;
	op->extent.length = length;
	op->extent.truncate_size = truncate_size;
	op->extent.truncate_seq = truncate_seq;
536
	if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL)
537 538
		payload_len += length;

539
	op->indata_len = payload_len;
540 541 542
}
EXPORT_SYMBOL(osd_req_op_extent_init);

543 544
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
545
{
546 547 548 549 550 551
	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;
552 553 554 555 556 557

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

	op->extent.length = length;
558
	op->indata_len -= previous - length;
559 560 561
}
EXPORT_SYMBOL(osd_req_op_extent_update);

562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
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);

584
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
585
			u16 opcode, const char *class, const char *method)
586
{
587 588
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
589
	struct ceph_pagelist *pagelist;
590 591 592 593 594
	size_t payload_len = 0;
	size_t size;

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

595 596 597 598
	pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
	BUG_ON(!pagelist);
	ceph_pagelist_init(pagelist);

599 600 601 602
	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
603
	ceph_pagelist_append(pagelist, class, size);
604 605 606 607 608 609
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
610
	ceph_pagelist_append(pagelist, method, size);
611 612
	payload_len += size;

613
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
614

615
	op->indata_len = payload_len;
616 617
}
EXPORT_SYMBOL(osd_req_op_cls_init);
618

619 620 621 622
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)
{
623 624
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647
	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);
648
	op->indata_len = payload_len;
649 650 651 652
	return 0;
}
EXPORT_SYMBOL(osd_req_op_xattr_init);

653 654
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
655 656
				u64 cookie, u64 version, int flag)
{
657 658
	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
						      opcode, 0);
659

660
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
661 662

	op->watch.cookie = cookie;
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Alex Elder 已提交
663
	op->watch.ver = version;
664
	if (opcode == CEPH_OSD_OP_WATCH && flag)
665
		op->watch.flag = (u8)1;
666 667 668
}
EXPORT_SYMBOL(osd_req_op_watch_init);

669 670 671 672 673 674
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,
675 676
						      CEPH_OSD_OP_SETALLOCHINT,
						      0);
677 678 679 680 681 682 683 684 685 686 687 688 689

	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);

690
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
691 692 693 694 695 696 697
				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)
698
			ceph_msg_data_add_pages(msg, osd_data->pages,
699 700 701
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
702
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
703 704
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
705
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
706 707 708 709 710 711
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

712 713
static u32 osd_req_encode_op(struct ceph_osd_op *dst,
			     const struct ceph_osd_req_op *src)
714 715 716 717 718 719 720 721 722 723 724 725
{
	if (WARN_ON(!osd_req_opcode_valid(src->op))) {
		pr_err("unrecognized osd opcode %d\n", src->op);

		return 0;
	}

	switch (src->op) {
	case CEPH_OSD_OP_STAT:
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
726
	case CEPH_OSD_OP_WRITEFULL:
L
Li Wang 已提交
727 728
	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_TRUNCATE:
729 730 731 732 733 734 735 736 737 738
		dst->extent.offset = cpu_to_le64(src->extent.offset);
		dst->extent.length = cpu_to_le64(src->extent.length);
		dst->extent.truncate_size =
			cpu_to_le64(src->extent.truncate_size);
		dst->extent.truncate_seq =
			cpu_to_le32(src->extent.truncate_seq);
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
739
		dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
740 741 742 743 744 745 746 747 748
		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;
749 750 751 752 753 754
	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;
755 756 757 758 759 760 761
	case CEPH_OSD_OP_SETXATTR:
	case CEPH_OSD_OP_CMPXATTR:
		dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
		dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
		dst->xattr.cmp_op = src->xattr.cmp_op;
		dst->xattr.cmp_mode = src->xattr.cmp_mode;
		break;
762 763 764
	case CEPH_OSD_OP_CREATE:
	case CEPH_OSD_OP_DELETE:
		break;
765
	default:
766
		pr_err("unsupported osd opcode %s\n",
767
			ceph_osd_op_name(src->op));
768
		WARN_ON(1);
769 770

		return 0;
771
	}
772

773
	dst->op = cpu_to_le16(src->op);
774
	dst->flags = cpu_to_le32(src->flags);
775
	dst->payload_len = cpu_to_le32(src->indata_len);
776

777
	return src->indata_len;
778 779
}

780 781 782 783 784 785 786 787 788 789 790 791 792 793
/*
 * 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,
794 795
					       u64 off, u64 *plen,
					       unsigned int which, int num_ops,
796 797 798 799
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
800
					       bool use_mempool)
801
{
802
	struct ceph_osd_request *req;
803 804 805
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
806
	int r;
807

L
Li Wang 已提交
808
	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
809 810
	       opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
	       opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
811

812
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
A
Alex Elder 已提交
813
					GFP_NOFS);
814 815 816 817
	if (!req) {
		r = -ENOMEM;
		goto fail;
	}
818

819
	/* calculate max write size */
820
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
821 822
	if (r)
		goto fail;
823

824
	if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
825
		osd_req_op_init(req, which, opcode, 0);
826 827 828 829 830 831 832 833 834 835 836
	} 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;
			}
837
		}
838
		osd_req_op_extent_init(req, which, opcode, objoff, objlen,
839 840
				       truncate_size, truncate_seq);
	}
841

842
	req->r_flags = flags;
843
	req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
844
	ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
845

846 847 848 849
	req->r_snapid = vino.snap;
	if (flags & CEPH_OSD_FLAG_WRITE)
		req->r_data_offset = off;

850 851 852 853
	r = ceph_osdc_alloc_messages(req, GFP_NOFS);
	if (r)
		goto fail;

S
Sage Weil 已提交
854
	return req;
855 856 857 858

fail:
	ceph_osdc_put_request(req);
	return ERR_PTR(r);
S
Sage Weil 已提交
859
}
860
EXPORT_SYMBOL(ceph_osdc_new_request);
S
Sage Weil 已提交
861 862 863 864

/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
I
Ilya Dryomov 已提交
865
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
S
Sage Weil 已提交
866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888

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;
}

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
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);
}

920 921 922 923 924 925
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
926
	struct ceph_osd_request *req, *nreq;
927
	LIST_HEAD(resend);
928
	LIST_HEAD(resend_linger);
929 930
	int err;

931
	dout("%s osd%d\n", __func__, osd->o_osd);
932
	err = __reset_osd(osdc, osd);
933
	if (err)
934
		return;
935

936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
	/*
	 * 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.
	 */
953
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
954 955
		if (!req->r_sent)
			break;
956 957 958 959 960

		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);
961
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
962 963 964
		} else {
			list_move_tail(&req->r_req_lru_item, &resend_linger);
		}
965
	}
966
	list_splice(&resend, &osdc->req_unsent);
967

968
	/*
969 970 971 972
	 * 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.
973
	 */
974
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
975
				 r_linger_osd_item) {
976 977
		WARN_ON(!list_empty(&req->r_req_lru_item));
		__kick_linger_request(req);
978
	}
979 980 981

	list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
		__kick_linger_request(req);
982 983
}

S
Sage Weil 已提交
984
/*
985
 * If the osd connection drops, we need to resubmit all requests.
S
Sage Weil 已提交
986 987 988 989 990 991 992 993 994 995 996
 */
static void osd_reset(struct ceph_connection *con)
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc;

	if (!osd)
		return;
	dout("osd_reset osd%d\n", osd->o_osd);
	osdc = osd->o_osdc;
	down_read(&osdc->map_sem);
S
Sage Weil 已提交
997 998
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
A
Alex Elder 已提交
999
	__send_queued(osdc);
S
Sage Weil 已提交
1000
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
1001 1002 1003 1004 1005 1006
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
1007
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
Sage Weil 已提交
1008 1009 1010 1011 1012 1013 1014 1015 1016
{
	struct ceph_osd *osd;

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

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
1017
	osd->o_osd = onum;
1018
	RB_CLEAR_NODE(&osd->o_node);
S
Sage Weil 已提交
1019
	INIT_LIST_HEAD(&osd->o_requests);
1020
	INIT_LIST_HEAD(&osd->o_linger_requests);
1021
	INIT_LIST_HEAD(&osd->o_osd_lru);
S
Sage Weil 已提交
1022 1023
	osd->o_incarnation = 1;

1024
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
1025

1026
	INIT_LIST_HEAD(&osd->o_keepalive_item);
S
Sage Weil 已提交
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
	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);
1046 1047
	if (atomic_dec_and_test(&osd->o_ref)) {
		if (osd->o_auth.authorizer)
1048
			ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
S
Sage Weil 已提交
1049
		kfree(osd);
S
Sage Weil 已提交
1050
	}
S
Sage Weil 已提交
1051 1052
}

I
Ilya Dryomov 已提交
1053 1054
DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)

S
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1055 1056 1057
/*
 * remove an osd from our map
 */
1058
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1059
{
1060
	dout("%s %p osd%d\n", __func__, osd, osd->o_osd);
1061 1062
	WARN_ON(!list_empty(&osd->o_requests));
	WARN_ON(!list_empty(&osd->o_linger_requests));
1063

1064
	list_del_init(&osd->o_osd_lru);
I
Ilya Dryomov 已提交
1065
	erase_osd(&osdc->osds, osd);
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076
}

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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1077 1078
}

1079 1080 1081
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
			      struct ceph_osd *osd)
{
1082
	dout("%s %p\n", __func__, osd);
1083
	BUG_ON(!list_empty(&osd->o_osd_lru));
1084

1085
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1086
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
1087 1088
}

1089 1090 1091 1092 1093 1094 1095 1096 1097 1098
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);
}

1099 1100 1101 1102 1103 1104 1105
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);
}

S
Sage Weil 已提交
1106 1107 1108
/*
 * reset osd connect
 */
1109
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1110
{
A
Alex Elder 已提交
1111
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1112

1113
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1114 1115
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1116
		remove_osd(osdc, osd);
A
Alex Elder 已提交
1117 1118 1119 1120 1121 1122 1123 1124
		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;

1125 1126
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1127 1128 1129
		/* 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
1130 1131

		return -EAGAIN;
S
Sage Weil 已提交
1132
	}
A
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1133 1134 1135 1136 1137 1138

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

	return 0;
S
Sage Weil 已提交
1139 1140
}

1141 1142 1143
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1144
			      osdc->client->options->osd_keepalive_timeout);
1145 1146 1147 1148 1149 1150
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
Sage Weil 已提交
1151 1152 1153 1154 1155

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1156 1157
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1158 1159
{
	req->r_tid = ++osdc->last_tid;
1160
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1161
	dout("__register_request %p tid %lld\n", req, req->r_tid);
I
Ilya Dryomov 已提交
1162
	insert_request(&osdc->requests, req);
S
Sage Weil 已提交
1163 1164 1165
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1166 1167
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1168
	}
1169 1170
}

S
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1171 1172 1173 1174 1175 1176
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1177 1178 1179 1180 1181 1182
	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
1183
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
I
Ilya Dryomov 已提交
1184
	erase_request(&osdc->requests, req);
S
Sage Weil 已提交
1185 1186
	osdc->num_requests--;

1187 1188
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1189
		ceph_msg_revoke(req->r_request);
1190 1191

		list_del_init(&req->r_osd_item);
1192
		maybe_move_osd_to_lru(osdc, req->r_osd);
1193
		if (list_empty(&req->r_linger_osd_item))
1194
			req->r_osd = NULL;
1195
	}
S
Sage Weil 已提交
1196

A
Alex Elder 已提交
1197
	list_del_init(&req->r_req_lru_item);
S
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1198 1199
	ceph_osdc_put_request(req);

1200 1201 1202
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1203 1204 1205 1206 1207 1208 1209 1210
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1211
	if (req->r_sent && req->r_osd) {
1212
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1213 1214 1215 1216
		req->r_sent = 0;
	}
}

1217 1218 1219
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
1220 1221 1222
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
	WARN_ON(!req->r_linger);

1223
	ceph_osdc_get_request(req);
1224
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1225
	if (req->r_osd)
1226
		list_add_tail(&req->r_linger_osd_item,
1227
			      &req->r_osd->o_linger_requests);
1228 1229 1230 1231 1232
}

static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req)
{
1233 1234 1235 1236 1237 1238 1239 1240 1241
	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
1242
	list_del_init(&req->r_linger_item);
1243

1244
	if (req->r_osd) {
1245
		list_del_init(&req->r_linger_osd_item);
1246
		maybe_move_osd_to_lru(osdc, req->r_osd);
1247 1248
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1249
	}
1250
	ceph_osdc_put_request(req);
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
}

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);

1263 1264 1265 1266 1267
static bool __pool_full(struct ceph_pg_pool_info *pi)
{
	return pi->flags & CEPH_POOL_FLAG_FULL;
}

1268 1269 1270 1271 1272 1273
/*
 * 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.
 */
1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397
static bool target_should_be_paused(struct ceph_osd_client *osdc,
				    const struct ceph_osd_request_target *t,
				    struct ceph_pg_pool_info *pi)
{
	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) ||
		       __pool_full(pi);

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

enum calc_target_result {
	CALC_TARGET_NO_ACTION = 0,
	CALC_TARGET_NEED_RESEND,
	CALC_TARGET_POOL_DNE,
};

static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
					   struct ceph_osd_request_target *t,
					   u32 *last_force_resend,
					   bool any_change)
{
	struct ceph_pg_pool_info *pi;
	struct ceph_pg pgid, last_pgid;
	struct ceph_osds up, acting;
	bool force_resend = false;
	bool need_check_tiering = false;
	bool need_resend = false;
	bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap,
					     CEPH_OSDMAP_SORTBITWISE);
	enum calc_target_result ct_res;
	int ret;

	pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
	if (!pi) {
		t->osd = CEPH_HOMELESS_OSD;
		ct_res = CALC_TARGET_POOL_DNE;
		goto out;
	}

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

	if (need_check_tiering &&
	    (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
		if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
			t->target_oloc.pool = pi->read_tier;
		if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
			t->target_oloc.pool = pi->write_tier;
	}

	ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
					&t->target_oloc, &pgid);
	if (ret) {
		WARN_ON(ret != -ENOENT);
		t->osd = CEPH_HOMELESS_OSD;
		ct_res = CALC_TARGET_POOL_DNE;
		goto out;
	}
	last_pgid.pool = pgid.pool;
	last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);

	ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
	if (any_change &&
	    ceph_is_new_interval(&t->acting,
				 &acting,
				 &t->up,
				 &up,
				 t->size,
				 pi->size,
				 t->min_size,
				 pi->min_size,
				 t->pg_num,
				 pi->pg_num,
				 t->sort_bitwise,
				 sort_bitwise,
				 &last_pgid))
		force_resend = true;

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

	if (ceph_pg_compare(&t->pgid, &pgid) ||
	    ceph_osds_changed(&t->acting, &acting, any_change) ||
	    force_resend) {
		t->pgid = pgid; /* struct */
		ceph_osds_copy(&t->acting, &acting);
		ceph_osds_copy(&t->up, &up);
		t->size = pi->size;
		t->min_size = pi->min_size;
		t->pg_num = pi->pg_num;
		t->pg_num_mask = pi->pg_num_mask;
		t->sort_bitwise = sort_bitwise;

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

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

1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
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
1414 1415 1416
/*
 * 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
1417
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1418
 * (unsent, homeless) or leave on in-flight lru.
S
Sage Weil 已提交
1419 1420 1421 1422 1423
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1424
static int __map_request(struct ceph_osd_client *osdc,
1425
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1426
{
1427
	enum calc_target_result ct_res;
S
Sage Weil 已提交
1428 1429
	int err;

1430
	dout("map_request %p tid %lld\n", req, req->r_tid);
1431

1432 1433 1434
	ct_res = calc_target(osdc, &req->r_t, NULL, force_resend);
	switch (ct_res) {
	case CALC_TARGET_POOL_DNE:
1435
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
1436 1437
		return -EIO;
	case CALC_TARGET_NO_ACTION:
S
Sage Weil 已提交
1438
		return 0;  /* no change */
1439 1440 1441
	default:
		BUG_ON(ct_res != CALC_TARGET_NEED_RESEND);
	}
S
Sage Weil 已提交
1442

1443
	dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
1444
	     req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd,
S
Sage Weil 已提交
1445 1446 1447 1448 1449
	     req->r_osd ? req->r_osd->o_osd : -1);

	if (req->r_osd) {
		__cancel_request(req);
		list_del_init(&req->r_osd_item);
1450
		list_del_init(&req->r_linger_osd_item);
S
Sage Weil 已提交
1451 1452 1453
		req->r_osd = NULL;
	}

1454 1455
	req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd);
	if (!req->r_osd && req->r_t.osd >= 0) {
1456
		err = -ENOMEM;
1457
		req->r_osd = create_osd(osdc, req->r_t.osd);
1458 1459
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1460
			goto out;
1461
		}
S
Sage Weil 已提交
1462

1463
		dout("map_request osd %p is osd%d\n", req->r_osd,
1464
		     req->r_osd->o_osd);
I
Ilya Dryomov 已提交
1465
		insert_osd(&osdc->osds, req->r_osd);
S
Sage Weil 已提交
1466

1467
		ceph_con_open(&req->r_osd->o_con,
1468 1469
			      CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd,
			      &osdc->osdmap->osd_addr[req->r_osd->o_osd]);
S
Sage Weil 已提交
1470 1471
	}

1472
	__enqueue_request(req);
1473
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1474 1475 1476 1477 1478

out:
	return err;
}

1479 1480
static void setup_request_data(struct ceph_osd_request *req,
			       struct ceph_msg *msg)
S
Sage Weil 已提交
1481
{
1482 1483 1484 1485 1486
	u32 data_len = 0;
	int i;

	if (!list_empty(&msg->data))
		return;
S
Sage Weil 已提交
1487

1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531
	WARN_ON(msg->data_length);
	for (i = 0; i < req->r_num_ops; i++) {
		struct ceph_osd_req_op *op = &req->r_ops[i];

		switch (op->op) {
		/* request */
		case CEPH_OSD_OP_WRITE:
		case CEPH_OSD_OP_WRITEFULL:
			WARN_ON(op->indata_len != op->extent.length);
			ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
			break;
		case CEPH_OSD_OP_SETXATTR:
		case CEPH_OSD_OP_CMPXATTR:
			WARN_ON(op->indata_len != op->xattr.name_len +
						  op->xattr.value_len);
			ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
			break;

		/* reply */
		case CEPH_OSD_OP_STAT:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->raw_data_in);
			break;
		case CEPH_OSD_OP_READ:
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->extent.osd_data);
			break;

		/* both */
		case CEPH_OSD_OP_CALL:
			WARN_ON(op->indata_len != op->cls.class_len +
						  op->cls.method_len +
						  op->cls.indata_len);
			ceph_osdc_msg_data_add(msg, &op->cls.request_info);
			/* optional, can be NONE */
			ceph_osdc_msg_data_add(msg, &op->cls.request_data);
			/* optional, can be NONE */
			ceph_osdc_msg_data_add(req->r_reply,
					       &op->cls.response_data);
			break;
		}

		data_len += op->indata_len;
	}
1532

1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571
	WARN_ON(data_len != msg->data_length);
}

static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
{
	void *p = msg->front.iov_base;
	void *const end = p + msg->front_alloc_len;
	u32 data_len = 0;
	int i;

	if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
		/* snapshots aren't writeable */
		WARN_ON(req->r_snapid != CEPH_NOSNAP);
	} else {
		WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
			req->r_data_offset || req->r_snapc);
	}

	setup_request_data(req, msg);

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

	/* oloc */
	ceph_encode_8(&p, 4);
	ceph_encode_8(&p, 4);
	ceph_encode_32(&p, 8 + 4 + 4);
	ceph_encode_64(&p, req->r_t.target_oloc.pool);
	ceph_encode_32(&p, -1); /* preferred */
	ceph_encode_32(&p, 0); /* key len */

	/* pgid */
	ceph_encode_8(&p, 1);
1572 1573
	ceph_encode_64(&p, req->r_t.pgid.pool);
	ceph_encode_32(&p, req->r_t.pgid.seed);
1574
	ceph_encode_32(&p, -1); /* preferred */
1575

1576 1577 1578 1579
	/* oid */
	ceph_encode_32(&p, req->r_t.target_oid.name_len);
	memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
	p += req->r_t.target_oid.name_len;
S
Sage Weil 已提交
1580

1581 1582 1583 1584 1585 1586
	/* ops, can imply data */
	ceph_encode_16(&p, req->r_num_ops);
	for (i = 0; i < req->r_num_ops; i++) {
		data_len += osd_req_encode_op(p, &req->r_ops[i]);
		p += sizeof(struct ceph_osd_op);
	}
1587

1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611
	ceph_encode_64(&p, req->r_snapid); /* snapid */
	if (req->r_snapc) {
		ceph_encode_64(&p, req->r_snapc->seq);
		ceph_encode_32(&p, req->r_snapc->num_snaps);
		for (i = 0; i < req->r_snapc->num_snaps; i++)
			ceph_encode_64(&p, req->r_snapc->snaps[i]);
	} else {
		ceph_encode_64(&p, 0); /* snap_seq */
		ceph_encode_32(&p, 0); /* snaps len */
	}

	ceph_encode_32(&p, req->r_attempts); /* retry_attempt */

	BUG_ON(p > end);
	msg->front.iov_len = p - msg->front.iov_base;
	msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
	msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
	msg->hdr.data_len = cpu_to_le32(data_len);
	/*
	 * The header "data_off" is a hint to the receiver allowing it
	 * to align received data into its buffers such that there's no
	 * need to re-copy it before writing it to disk (direct I/O).
	 */
	msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
1612

1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645
	dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__,
	     req, req->r_t.target_oid.name_len, req->r_t.target_oid.name,
	     req->r_t.target_oid.name_len, msg->front.iov_len, data_len);
}

/*
 * @req has to be assigned a tid and registered.
 */
static void send_request(struct ceph_osd_request *req)
{
	struct ceph_osd *osd = req->r_osd;

	WARN_ON(osd->o_osd != req->r_t.osd);

	req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
	if (req->r_attempts)
		req->r_flags |= CEPH_OSD_FLAG_RETRY;
	else
		WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);

	encode_request(req, req->r_request);

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

	req->r_t.paused = false;
	req->r_stamp = jiffies;
	req->r_attempts++;

	req->r_sent = osd->o_incarnation;
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
	ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
S
Sage Weil 已提交
1646 1647
}

1648 1649 1650
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1651
static void __send_queued(struct ceph_osd_client *osdc)
1652 1653 1654
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1655
	dout("__send_queued\n");
1656 1657 1658 1659
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
		list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
		send_request(req);
	}
1660 1661
}

1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695
/*
 * 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;
}

1696 1697 1698 1699 1700 1701 1702 1703
static void __complete_request(struct ceph_osd_request *req)
{
	if (req->r_callback)
		req->r_callback(req);
	else
		complete_all(&req->r_completion);
}

S
Sage Weil 已提交
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716
/*
 * 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);
1717
	struct ceph_options *opts = osdc->client->options;
S
Sage Weil 已提交
1718
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1719
	struct ceph_osd *osd;
1720
	struct list_head slow_osds;
S
Sage Weil 已提交
1721 1722 1723 1724 1725 1726 1727
	dout("timeout\n");
	down_read(&osdc->map_sem);

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

	mutex_lock(&osdc->request_mutex);

1728 1729 1730 1731 1732 1733 1734
	/*
	 * 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) {
1735 1736
		if (time_before(jiffies,
				req->r_stamp + opts->osd_keepalive_timeout))
1737 1738 1739 1740 1741
			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
1742
		     req->r_tid, osd->o_osd);
1743 1744 1745 1746 1747 1748
		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
1749 1750 1751
		ceph_con_keepalive(&osd->o_con);
	}

1752
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1753
	__send_queued(osdc);
S
Sage Weil 已提交
1754 1755 1756 1757
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1758 1759 1760 1761 1762
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);
1763
	unsigned long delay = osdc->client->options->osd_idle_ttl / 4;
1764
	struct ceph_osd *osd, *nosd;
1765

1766
	dout("%s osdc %p\n", __func__, osdc);
1767
	down_read(&osdc->map_sem);
1768 1769 1770 1771 1772 1773 1774 1775
	mutex_lock(&osdc->request_mutex);

	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
		if (time_before(jiffies, osd->lru_ttl))
			break;

		remove_osd(osdc, osd);
	}
1776

1777 1778
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
1779 1780 1781 1782
	schedule_delayed_work(&osdc->osds_timeout_work,
			      round_jiffies_relative(delay));
}

1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885
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;
}

1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898
struct MOSDOpReply {
	struct ceph_pg pgid;
	u64 flags;
	int result;
	u32 epoch;
	int num_ops;
	u32 outdata_len[CEPH_OSD_MAX_OPS];
	s32 rval[CEPH_OSD_MAX_OPS];
	int retry_attempt;
	struct ceph_eversion replay_version;
	u64 user_version;
	struct ceph_request_redirect redirect;
};
S
Sage Weil 已提交
1899

1900
static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
S
Sage Weil 已提交
1901
{
1902 1903 1904 1905
	void *p = msg->front.iov_base;
	void *const end = p + msg->front.iov_len;
	u16 version = le16_to_cpu(msg->hdr.version);
	struct ceph_eversion bad_replay_version;
I
Ilya Dryomov 已提交
1906
	u8 decode_redir;
1907 1908 1909
	u32 len;
	int ret;
	int i;
1910

1911 1912 1913
	ceph_decode_32_safe(&p, end, len, e_inval);
	ceph_decode_need(&p, end, len, e_inval);
	p += len; /* skip oid */
1914

1915 1916 1917
	ret = ceph_decode_pgid(&p, end, &m->pgid);
	if (ret)
		return ret;
1918

1919 1920 1921 1922 1923 1924
	ceph_decode_64_safe(&p, end, m->flags, e_inval);
	ceph_decode_32_safe(&p, end, m->result, e_inval);
	ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
	memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
	p += sizeof(bad_replay_version);
	ceph_decode_32_safe(&p, end, m->epoch, e_inval);
1925

1926 1927 1928
	ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
	if (m->num_ops > ARRAY_SIZE(m->outdata_len))
		goto e_inval;
1929

1930 1931 1932
	ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
			 e_inval);
	for (i = 0; i < m->num_ops; i++) {
1933 1934
		struct ceph_osd_op *op = p;

1935
		m->outdata_len[i] = le32_to_cpu(op->payload_len);
1936 1937 1938
		p += sizeof(*op);
	}

1939 1940 1941
	ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
	for (i = 0; i < m->num_ops; i++)
		ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
S
Sage Weil 已提交
1942

1943 1944 1945 1946 1947 1948 1949 1950 1951
	if (version >= 5) {
		ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
		memcpy(&m->replay_version, p, sizeof(m->replay_version));
		p += sizeof(m->replay_version);
		ceph_decode_64_safe(&p, end, m->user_version, e_inval);
	} else {
		m->replay_version = bad_replay_version; /* struct */
		m->user_version = le64_to_cpu(m->replay_version.version);
	}
Y
Yan, Zheng 已提交
1952

1953 1954 1955
	if (version >= 6) {
		if (version >= 7)
			ceph_decode_8_safe(&p, end, decode_redir, e_inval);
I
Ilya Dryomov 已提交
1956 1957 1958 1959 1960 1961 1962
		else
			decode_redir = 1;
	} else {
		decode_redir = 0;
	}

	if (decode_redir) {
1963 1964 1965
		ret = ceph_redirect_decode(&p, end, &m->redirect);
		if (ret)
			return ret;
1966
	} else {
1967
		ceph_oloc_init(&m->redirect.oloc);
1968
	}
S
Sage Weil 已提交
1969

1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987
	return 0;

e_inval:
	return -EINVAL;
}

/*
 * We are done with @req if
 *   - @m is a safe reply, or
 *   - @m is an unsafe reply and we didn't want a safe one
 */
static bool done_request(const struct ceph_osd_request *req,
			 const struct MOSDOpReply *m)
{
	return (m->result < 0 ||
		(m->flags & CEPH_OSD_FLAG_ONDISK) ||
		!(req->r_flags & CEPH_OSD_FLAG_ONDISK));
}
1988

1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 *
 * ->r_unsafe_callback is set?	yes			no
 *
 * first reply is OK (needed	r_cb/r_completion,	r_cb/r_completion,
 * any or needed/got safe)	r_safe_completion	r_safe_completion
 *
 * first reply is unsafe	r_unsafe_cb(true)	(nothing)
 *
 * when we get the safe reply	r_unsafe_cb(false),	r_cb/r_completion,
 *				r_safe_completion	r_safe_completion
 */
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg)
{
	struct ceph_osd_request *req;
	struct MOSDOpReply m;
	u64 tid = le64_to_cpu(msg->hdr.tid);
	u32 data_len = 0;
	bool already_acked;
	int ret;
	int i;

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

	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
	req = lookup_request(&osdc->requests, tid);
	if (!req) {
		dout("%s no tid %llu\n", __func__, tid);
		goto out_unlock;
	}
	ceph_osdc_get_request(req);

	ret = decode_MOSDOpReply(msg, &m);
	if (ret) {
		pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
		       req->r_tid, ret);
		ceph_msg_dump(msg);
		goto fail_request;
	}
	dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
	     __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
	     m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
	     le64_to_cpu(m.replay_version.version), m.user_version);

	if (m.retry_attempt >= 0) {
		if (m.retry_attempt != req->r_attempts - 1) {
			dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
			     req, req->r_tid, m.retry_attempt,
			     req->r_attempts - 1);
			goto out_put;
		}
	} else {
		WARN_ON(1); /* MOSDOpReply v4 is assumed */
	}

	if (!ceph_oloc_empty(&m.redirect.oloc)) {
		dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
		     m.redirect.oloc.pool);
2050 2051
		__unregister_request(osdc, req);

2052
		ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc);
2053 2054 2055 2056 2057 2058 2059 2060 2061

		/*
		 * 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.
		 */
2062 2063
		ret = __ceph_osdc_start_request(osdc, req, true);
		BUG_ON(ret);
2064

2065
		goto out_put;
2066 2067
	}

2068 2069 2070 2071
	if (m.num_ops != req->r_num_ops) {
		pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
		       req->r_num_ops, req->r_tid);
		goto fail_request;
S
Sage Weil 已提交
2072
	}
2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098
	for (i = 0; i < req->r_num_ops; i++) {
		dout(" req %p tid %llu op %d rval %d len %u\n", req,
		     req->r_tid, i, m.rval[i], m.outdata_len[i]);
		req->r_ops[i].rval = m.rval[i];
		req->r_ops[i].outdata_len = m.outdata_len[i];
		data_len += m.outdata_len[i];
	}
	if (data_len != le32_to_cpu(msg->hdr.data_len)) {
		pr_err("sum of lens %u != %u for tid %llu\n", data_len,
		       le32_to_cpu(msg->hdr.data_len), req->r_tid);
		goto fail_request;
	}
	dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
	     req, req->r_tid, req->r_got_reply, m.result, data_len);

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

	if (done_request(req, &m)) {
S
Sage Weil 已提交
2099
		__unregister_request(osdc, req);
2100 2101 2102 2103 2104
		if (req->r_linger) {
			WARN_ON(req->r_unsafe_callback);
			__register_linger_request(osdc, req);
		}
	}
S
Sage Weil 已提交
2105 2106

	mutex_unlock(&osdc->request_mutex);
2107
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
2108

2109 2110 2111
	if (done_request(req, &m)) {
		if (already_acked && req->r_unsafe_callback) {
			dout("req %p tid %llu safe-cb\n", req, req->r_tid);
2112
			req->r_unsafe_callback(req, false);
2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123
		} else {
			dout("req %p tid %llu cb\n", req, req->r_tid);
			__complete_request(req);
		}
	} else {
		if (req->r_unsafe_callback) {
			dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
			req->r_unsafe_callback(req, true);
		} else {
			WARN_ON(1);
		}
2124
	}
2125 2126
	if (m.flags & CEPH_OSD_FLAG_ONDISK)
		complete_all(&req->r_safe_completion);
S
Sage Weil 已提交
2127 2128 2129 2130

	ceph_osdc_put_request(req);
	return;

2131
fail_request:
2132 2133
	req->r_result = -EIO;
	__unregister_request(osdc, req);
2134 2135 2136
	__complete_request(req);
	complete_all(&req->r_safe_completion);
out_put:
2137
	ceph_osdc_put_request(req);
2138
out_unlock:
2139
	mutex_unlock(&osdc->request_mutex);
2140
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
2141 2142
}

2143
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
2144 2145 2146
{
	struct rb_node *p, *n;

2147
	dout("%s %p\n", __func__, osdc);
2148 2149
	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
2150

2151 2152 2153 2154 2155 2156 2157
		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
2158
	}
2159 2160 2161
}

/*
2162 2163
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
2164
 *
2165
 * Caller should hold map_sem for read.
2166
 */
2167 2168
static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
			  bool force_resend_writes)
2169
{
2170
	struct ceph_osd_request *req, *nreq;
2171 2172 2173
	struct rb_node *p;
	int needmap = 0;
	int err;
2174
	bool force_resend_req;
2175

2176 2177
	dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
		force_resend_writes ? " (force resend writes)" : "");
2178
	mutex_lock(&osdc->request_mutex);
2179
	for (p = rb_first(&osdc->requests); p; ) {
2180
		req = rb_entry(p, struct ceph_osd_request, r_node);
2181
		p = rb_next(p);
2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194

		/*
		 * 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);
2195
			ceph_osdc_get_request(req);
2196 2197
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
2198
			ceph_osdc_put_request(req);
2199 2200 2201
			continue;
		}

2202 2203 2204 2205
		force_resend_req = force_resend ||
			(force_resend_writes &&
				req->r_flags & CEPH_OSD_FLAG_WRITE);
		err = __map_request(osdc, req, force_resend_req);
2206 2207 2208 2209 2210 2211
		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) {
2212 2213 2214 2215
			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);
2216
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
2217 2218
			}
		}
2219 2220 2221 2222 2223 2224
	}

	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);

2225 2226
		err = __map_request(osdc, req,
				    force_resend || force_resend_writes);
2227
		dout("__map_request returned %d\n", err);
2228 2229
		if (err < 0)
			continue;  /* hrm! */
2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244
		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++;
			}
2245

2246 2247 2248 2249 2250
			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);
		}
2251
	}
2252
	reset_changed_osds(osdc);
S
Sage Weil 已提交
2253 2254 2255 2256 2257 2258
	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);
	}
2259
}
2260 2261


S
Sage Weil 已提交
2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276
/*
 * 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;
2277
	bool was_full;
S
Sage Weil 已提交
2278 2279 2280 2281 2282 2283 2284 2285

	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));
2286 2287
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
2288 2289 2290

	down_write(&osdc->map_sem);

2291 2292
	was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);

S
Sage Weil 已提交
2293 2294 2295 2296 2297
	/* 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);
2298 2299
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
2300 2301 2302 2303 2304 2305
		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,
2306
							  osdc->osdmap);
S
Sage Weil 已提交
2307 2308 2309 2310
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2311
			BUG_ON(!newmap);
S
Sage Weil 已提交
2312 2313 2314 2315
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
2316 2317 2318 2319
			was_full = was_full ||
				ceph_osdmap_flag(osdc->osdmap,
						 CEPH_OSDMAP_FULL);
			kick_requests(osdc, 0, was_full);
S
Sage Weil 已提交
2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334
		} 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);
2335 2336
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
2337 2338 2339 2340 2341 2342 2343 2344 2345
		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 {
2346 2347
			int skipped_map = 0;

S
Sage Weil 已提交
2348
			dout("taking full map %u len %d\n", epoch, maplen);
2349
			newmap = ceph_osdmap_decode(&p, p+maplen);
S
Sage Weil 已提交
2350 2351 2352 2353
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2354
			BUG_ON(!newmap);
S
Sage Weil 已提交
2355 2356
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
2357 2358 2359
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
2360
				ceph_osdmap_destroy(oldmap);
2361
			}
2362 2363 2364 2365
			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
2366 2367 2368 2369 2370
		}
		p += maplen;
		nr_maps--;
	}

2371 2372
	if (!osdc->osdmap)
		goto bad;
S
Sage Weil 已提交
2373 2374
done:
	downgrade_write(&osdc->map_sem);
2375 2376
	ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
			  osdc->osdmap->epoch);
2377 2378 2379 2380 2381 2382

	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
2383 2384 2385
	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))
2386 2387
		ceph_monc_request_next_osdmap(&osdc->client->monc);

A
Alex Elder 已提交
2388 2389 2390
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2391
	up_read(&osdc->map_sem);
2392
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
2393 2394 2395 2396
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
2397
	ceph_msg_dump(msg);
S
Sage Weil 已提交
2398 2399 2400
	up_write(&osdc->map_sem);
}

2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482
/*
 * 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 *),
2483
			   void *data, struct ceph_osd_event **pevent)
2484 2485 2486 2487 2488 2489 2490 2491 2492
{
	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;
2493
	event->one_shot = 0;
2494 2495 2496
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
2497
	RB_CLEAR_NODE(&event->node);
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 2543
	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
 */
2544 2545
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
{
	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) {
2566
		BUG_ON(event->one_shot);
2567 2568 2569 2570 2571 2572 2573 2574
		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) {
2575 2576 2577
			pr_err("couldn't allocate event_work\n");
			ceph_osdc_put_event(event);
			return;
2578
		}
2579
		INIT_WORK(&event_work->work, do_event_work);
2580 2581 2582 2583 2584
		event_work->event = event;
		event_work->ver = ver;
		event_work->notify_id = notify_id;
		event_work->opcode = opcode;

2585 2586
		queue_work(osdc->notify_wq, &event_work->work);
	}
2587 2588 2589 2590 2591 2592 2593

	return;

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

2594 2595 2596 2597 2598 2599 2600
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
2601
	int rc;
2602

S
Sage Weil 已提交
2603 2604
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2605 2606 2607

	rc = __ceph_osdc_start_request(osdc, req, nofail);

S
Sage Weil 已提交
2608 2609
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
2610

S
Sage Weil 已提交
2611 2612
	return rc;
}
2613
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2614

2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633
/*
 * 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
2634 2635 2636 2637 2638 2639 2640 2641
/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	int rc;

2642 2643
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);

S
Sage Weil 已提交
2644 2645
	rc = wait_for_completion_interruptible(&req->r_completion);
	if (rc < 0) {
2646 2647
		dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
		ceph_osdc_cancel_request(req);
2648 2649 2650

		/* kludge - need to to wake ceph_osdc_sync() */
		complete_all(&req->r_safe_completion);
S
Sage Weil 已提交
2651 2652 2653
		return rc;
	}

2654 2655
	dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
	     req->r_result);
S
Sage Weil 已提交
2656 2657
	return req->r_result;
}
2658
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691

/*
 * 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);
}
2692
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2693

2694 2695 2696 2697
/*
 * 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
2698
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2699 2700 2701 2702 2703 2704
{
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);


S
Sage Weil 已提交
2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718
/*
 * 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);
	mutex_init(&osdc->request_mutex);
	osdc->last_tid = 0;
	osdc->osds = RB_ROOT;
2719
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2720
	osdc->requests = RB_ROOT;
2721
	INIT_LIST_HEAD(&osdc->req_lru);
2722 2723
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2724
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2725 2726
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2727
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2728 2729 2730
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2731

2732
	err = -ENOMEM;
2733 2734
	osdc->req_mempool = mempool_create_slab_pool(10,
						     ceph_osd_request_cache);
S
Sage Weil 已提交
2735
	if (!osdc->req_mempool)
2736
		goto out;
S
Sage Weil 已提交
2737

2738
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
2739
				PAGE_SIZE, 10, true, "osd_op");
S
Sage Weil 已提交
2740
	if (err < 0)
2741
		goto out_mempool;
2742
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2743
				PAGE_SIZE, 10, true, "osd_op_reply");
S
Sage Weil 已提交
2744 2745
	if (err < 0)
		goto out_msgpool;
2746

2747
	err = -ENOMEM;
2748
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2749
	if (!osdc->notify_wq)
2750 2751
		goto out_msgpool_reply;

2752 2753 2754
	schedule_delayed_work(&osdc->osds_timeout_work,
	    round_jiffies_relative(osdc->client->options->osd_idle_ttl));

S
Sage Weil 已提交
2755
	return 0;
2756

2757 2758
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2759 2760
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2761 2762 2763 2764
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2765 2766 2767 2768
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2769 2770
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2771
	cancel_delayed_work_sync(&osdc->timeout_work);
2772
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
2773 2774 2775 2776 2777 2778 2779 2780 2781

	mutex_lock(&osdc->request_mutex);
	while (!RB_EMPTY_ROOT(&osdc->osds)) {
		struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
						struct ceph_osd, o_node);
		remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);

S
Sage Weil 已提交
2782 2783 2784 2785 2786 2787
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2788
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2789 2790 2791 2792 2793 2794 2795 2796 2797 2798
}

/*
 * 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,
2799
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2800 2801 2802 2803 2804 2805
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2806
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
S
Sage Weil 已提交
2807
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2808
				    NULL, truncate_seq, truncate_size,
2809
				    false);
2810 2811
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2812 2813

	/* it may be a short read due to an object boundary */
2814
	osd_req_op_extent_osd_data_pages(req, 0,
2815
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2816

2817
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2818
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2819 2820 2821 2822 2823 2824 2825 2826 2827

	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;
}
2828
EXPORT_SYMBOL(ceph_osdc_readpages);
S
Sage Weil 已提交
2829 2830 2831 2832 2833 2834 2835 2836 2837 2838

/*
 * 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,
2839
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2840 2841 2842
{
	struct ceph_osd_request *req;
	int rc = 0;
2843
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2844

2845
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
S
Sage Weil 已提交
2846
				    CEPH_OSD_OP_WRITE,
2847
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2848
				    snapc, truncate_seq, truncate_size,
2849
				    true);
2850 2851
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2852 2853

	/* it may be a short write due to an object boundary */
2854
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2855 2856
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2857

2858
	req->r_mtime = *mtime;
2859
	rc = ceph_osdc_start_request(osdc, req, true);
S
Sage Weil 已提交
2860 2861 2862 2863 2864 2865 2866 2867 2868
	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;
}
2869
EXPORT_SYMBOL(ceph_osdc_writepages);
S
Sage Weil 已提交
2870

2871 2872
int ceph_osdc_setup(void)
{
2873 2874 2875
	size_t size = sizeof(struct ceph_osd_request) +
	    CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);

2876
	BUG_ON(ceph_osd_request_cache);
2877 2878
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
						   0, 0, NULL);
2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891

	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
2892 2893 2894 2895 2896 2897
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2898
	struct ceph_osd_client *osdc;
S
Sage Weil 已提交
2899 2900 2901
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
Sage Weil 已提交
2902
		goto out;
2903
	osdc = osd->o_osdc;
S
Sage Weil 已提交
2904 2905 2906 2907 2908 2909

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2910
		handle_reply(osdc, msg);
S
Sage Weil 已提交
2911
		break;
2912 2913 2914
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
Sage Weil 已提交
2915 2916 2917 2918 2919

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
Sage Weil 已提交
2920
out:
S
Sage Weil 已提交
2921 2922 2923
	ceph_msg_put(msg);
}

2924
/*
2925 2926 2927
 * 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.
2928 2929
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2930 2931
				  struct ceph_msg_header *hdr,
				  int *skip)
S
Sage Weil 已提交
2932 2933 2934
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2935
	struct ceph_msg *m;
2936
	struct ceph_osd_request *req;
2937
	int front_len = le32_to_cpu(hdr->front_len);
2938
	int data_len = le32_to_cpu(hdr->data_len);
2939
	u64 tid;
S
Sage Weil 已提交
2940

2941 2942
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
I
Ilya Dryomov 已提交
2943
	req = lookup_request(&osdc->requests, tid);
2944
	if (!req) {
2945 2946
		dout("%s osd%d tid %llu unknown, skipping\n", __func__,
		     osd->o_osd, tid);
2947
		m = NULL;
2948
		*skip = 1;
2949 2950
		goto out;
	}
S
Sage Weil 已提交
2951

2952
	ceph_msg_revoke_incoming(req->r_reply);
2953

2954
	if (front_len > req->r_reply->front_alloc_len) {
2955 2956 2957
		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);
2958 2959
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
2960
		if (!m)
S
Sage Weil 已提交
2961 2962 2963 2964
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
2965

2966 2967 2968 2969 2970 2971 2972
	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;
2973
	}
2974 2975

	m = ceph_msg_get(req->r_reply);
S
Sage Weil 已提交
2976
	dout("get_reply tid %lld %p\n", tid, m);
2977 2978 2979

out:
	mutex_unlock(&osdc->request_mutex);
2980
	return m;
2981 2982 2983 2984 2985 2986 2987 2988 2989 2990
}

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
2991
	*skip = 0;
2992 2993
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2994
	case CEPH_MSG_WATCH_NOTIFY:
2995
		return ceph_msg_new(type, front, GFP_NOFS, false);
2996 2997 2998 2999 3000 3001 3002 3003
	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
3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022
}

/*
 * 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);
}

3023 3024 3025
/*
 * authentication
 */
3026 3027 3028 3029 3030
/*
 * 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,
3031
					int *proto, int force_new)
3032 3033 3034 3035
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
3036
	struct ceph_auth_handshake *auth = &o->o_auth;
3037

3038
	if (force_new && auth->authorizer) {
3039
		ceph_auth_destroy_authorizer(auth->authorizer);
3040 3041
		auth->authorizer = NULL;
	}
3042 3043 3044
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
3045
		if (ret)
3046
			return ERR_PTR(ret);
3047 3048
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
3049 3050 3051
						     auth);
		if (ret)
			return ERR_PTR(ret);
3052 3053
	}
	*proto = ac->protocol;
3054

3055
	return auth;
3056 3057 3058 3059 3060 3061 3062 3063 3064
}


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;

3065
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
3066 3067
}

3068 3069 3070 3071 3072 3073
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;

3074
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
3075 3076
	return ceph_monc_validate_auth(&osdc->client->monc);
}
3077

3078
static int osd_sign_message(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
3079
{
3080
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
3081
	struct ceph_auth_handshake *auth = &o->o_auth;
3082

Y
Yan, Zheng 已提交
3083 3084 3085
	return ceph_auth_sign_message(auth, msg);
}

3086
static int osd_check_message_signature(struct ceph_msg *msg)
Y
Yan, Zheng 已提交
3087
{
3088
	struct ceph_osd *o = msg->con->private;
Y
Yan, Zheng 已提交
3089
	struct ceph_auth_handshake *auth = &o->o_auth;
3090

Y
Yan, Zheng 已提交
3091 3092 3093
	return ceph_auth_check_message_signature(auth, msg);
}

3094
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
3095 3096 3097
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
3098 3099
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
3100
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
3101
	.alloc_msg = alloc_msg,
3102 3103
	.sign_message = osd_sign_message,
	.check_message_signature = osd_check_message_signature,
3104
	.fault = osd_reset,
S
Sage Weil 已提交
3105
};