osd_client.c 76.1 KB
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#include <linux/ceph/ceph_debug.h>
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#include <linux/module.h>
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#include <linux/err.h>
#include <linux/highmem.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
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#ifdef CONFIG_BLOCK
#include <linux/bio.h>
#endif
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#include <linux/ceph/libceph.h>
#include <linux/ceph/osd_client.h>
#include <linux/ceph/messenger.h>
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
#include <linux/ceph/pagelist.h>
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#define OSD_OP_FRONT_LEN	4096
#define OSD_OPREPLY_FRONT_LEN	512
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static struct kmem_cache	*ceph_osd_request_cache;

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static const struct ceph_connection_operations osd_con_ops;
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static void __send_queued(struct ceph_osd_client *osdc);
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static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
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static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req);
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static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req);
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static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req);
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static void __enqueue_request(struct ceph_osd_request *req);
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static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req);
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/*
 * Implement client access to distributed object storage cluster.
 *
 * All data objects are stored within a cluster/cloud of OSDs, or
 * "object storage devices."  (Note that Ceph OSDs have _nothing_ to
 * do with the T10 OSD extensions to SCSI.)  Ceph OSDs are simply
 * remote daemons serving up and coordinating consistent and safe
 * access to storage.
 *
 * Cluster membership and the mapping of data objects onto storage devices
 * are described by the osd map.
 *
 * We keep track of pending OSD requests (read, write), resubmit
 * requests to different OSDs when the cluster topology/data layout
 * change, or retry the affected requests when the communications
 * channel with an OSD is reset.
 */

/*
 * calculate the mapping of a file extent onto an object, and fill out the
 * request accordingly.  shorten extent as necessary if it crosses an
 * object boundary.
 *
 * fill osd op in request message.
 */
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static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
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			u64 *objnum, u64 *objoff, u64 *objlen)
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{
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	u64 orig_len = *plen;
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	int r;
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	/* object extent? */
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	r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
					  objoff, objlen);
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	if (r < 0)
		return r;
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	if (*objlen < orig_len) {
		*plen = *objlen;
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		dout(" skipping last %llu, final file extent %llu~%llu\n",
		     orig_len - *plen, off, *plen);
	}

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	dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
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	return 0;
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}

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static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
{
	memset(osd_data, 0, sizeof (*osd_data));
	osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
}

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static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
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			struct page **pages, u64 length, u32 alignment,
			bool pages_from_pool, bool own_pages)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
	osd_data->pages = pages;
	osd_data->length = length;
	osd_data->alignment = alignment;
	osd_data->pages_from_pool = pages_from_pool;
	osd_data->own_pages = own_pages;
}

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static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
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			struct ceph_pagelist *pagelist)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
	osd_data->pagelist = pagelist;
}

#ifdef CONFIG_BLOCK
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static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
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			struct bio *bio, size_t bio_length)
{
	osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
	osd_data->bio = bio;
	osd_data->bio_length = bio_length;
}
#endif /* CONFIG_BLOCK */

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#define osd_req_op_data(oreq, whch, typ, fld)	\
	({						\
		BUG_ON(whch >= (oreq)->r_num_ops);	\
		&(oreq)->r_ops[whch].typ.fld;		\
	})

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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	osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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	ceph_osd_data_pagelist_init(osd_data, pagelist);
}
EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);

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

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

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

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

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

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

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

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

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

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

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/*
 * requests
 */
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static void ceph_osdc_release_request(struct kref *kref)
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{
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	struct ceph_osd_request *req = container_of(kref,
					    struct ceph_osd_request, r_kref);
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	unsigned int which;
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	dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
	     req->r_request, req->r_reply);
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	WARN_ON(!RB_EMPTY_NODE(&req->r_node));
	WARN_ON(!list_empty(&req->r_req_lru_item));
	WARN_ON(!list_empty(&req->r_osd_item));
	WARN_ON(!list_empty(&req->r_linger_item));
	WARN_ON(!list_empty(&req->r_linger_osd_item));
	WARN_ON(req->r_osd);
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	if (req->r_request)
		ceph_msg_put(req->r_request);
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	if (req->r_reply) {
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		ceph_msg_revoke_incoming(req->r_reply);
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		ceph_msg_put(req->r_reply);
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	}
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	for (which = 0; which < req->r_num_ops; which++)
		osd_req_op_data_release(req, which);
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	ceph_put_snap_context(req->r_snapc);
	if (req->r_mempool)
		mempool_free(req, req->r_osdc->req_mempool);
	else
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		kmem_cache_free(ceph_osd_request_cache, req);

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}
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void ceph_osdc_get_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
	     atomic_read(&req->r_kref.refcount));
	kref_get(&req->r_kref);
}
EXPORT_SYMBOL(ceph_osdc_get_request);

void ceph_osdc_put_request(struct ceph_osd_request *req)
{
	dout("%s %p (was %d)\n", __func__, req,
	     atomic_read(&req->r_kref.refcount));
	kref_put(&req->r_kref, ceph_osdc_release_request);
}
EXPORT_SYMBOL(ceph_osdc_put_request);
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struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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					       struct ceph_snap_context *snapc,
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					       unsigned int num_ops,
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					       bool use_mempool,
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					       gfp_t gfp_flags)
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{
	struct ceph_osd_request *req;
	struct ceph_msg *msg;
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	size_t msg_size;

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

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

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	req->r_base_oloc.pool = -1;
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	req->r_target_oloc.pool = -1;
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	/* create reply message */
	if (use_mempool)
		msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
	else
		msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
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				   OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
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	if (!msg) {
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		ceph_osdc_put_request(req);
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		return NULL;
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	}
	req->r_reply = msg;

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

	return req;
}
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EXPORT_SYMBOL(ceph_osdc_alloc_request);
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static bool osd_req_opcode_valid(u16 opcode)
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{
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	switch (opcode) {
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#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)
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{
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	struct ceph_osd_req_op *op;

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

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

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

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

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

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

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void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
				unsigned int which, u64 length)
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{
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	struct ceph_osd_req_op *op;
	u64 previous;

	BUG_ON(which >= osd_req->r_num_ops);
	op = &osd_req->r_ops[which];
	previous = op->extent.length;
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	if (length == previous)
		return;		/* Nothing to do */
	BUG_ON(length > previous);

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

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

	BUG_ON(opcode != CEPH_OSD_OP_CALL);

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

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	op->cls.class_name = class;
	size = strlen(class);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.class_len = size;
530
	ceph_pagelist_append(pagelist, class, size);
531 532 533 534 535 536
	payload_len += size;

	op->cls.method_name = method;
	size = strlen(method);
	BUG_ON(size > (size_t) U8_MAX);
	op->cls.method_len = size;
537
	ceph_pagelist_append(pagelist, method, size);
538 539
	payload_len += size;

540
	osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
541

542 543 544 545 546
	op->cls.argc = 0;	/* currently unused */

	op->payload_len = payload_len;
}
EXPORT_SYMBOL(osd_req_op_cls_init);
547

548 549
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
				unsigned int which, u16 opcode,
550 551
				u64 cookie, u64 version, int flag)
{
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	struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
553

554
	BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
555 556

	op->watch.cookie = cookie;
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	op->watch.ver = version;
558
	if (opcode == CEPH_OSD_OP_WATCH && flag)
559
		op->watch.flag = (u8)1;
560 561 562
}
EXPORT_SYMBOL(osd_req_op_watch_init);

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

	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);

583
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
584 585 586 587 588 589 590
				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)
591
			ceph_msg_data_add_pages(msg, osd_data->pages,
592 593 594
					length, osd_data->alignment);
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
		BUG_ON(!length);
595
		ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
596 597
#ifdef CONFIG_BLOCK
	} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
598
		ceph_msg_data_add_bio(msg, osd_data->bio, length);
599 600 601 602 603 604
#endif
	} else {
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
	}
}

605
static u64 osd_req_encode_op(struct ceph_osd_request *req,
606
			      struct ceph_osd_op *dst, unsigned int which)
607
{
608
	struct ceph_osd_req_op *src;
609
	struct ceph_osd_data *osd_data;
610
	u64 request_data_len = 0;
611
	u64 data_length;
612

613 614
	BUG_ON(which >= req->r_num_ops);
	src = &req->r_ops[which];
615 616 617 618 619 620 621 622
	if (WARN_ON(!osd_req_opcode_valid(src->op))) {
		pr_err("unrecognized osd opcode %d\n", src->op);

		return 0;
	}

	switch (src->op) {
	case CEPH_OSD_OP_STAT:
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		osd_data = &src->raw_data_in;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
625 626 627
		break;
	case CEPH_OSD_OP_READ:
	case CEPH_OSD_OP_WRITE:
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	case CEPH_OSD_OP_ZERO:
	case CEPH_OSD_OP_DELETE:
	case CEPH_OSD_OP_TRUNCATE:
631
		if (src->op == CEPH_OSD_OP_WRITE)
632
			request_data_len = src->extent.length;
633 634 635 636 637 638
		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);
639
		osd_data = &src->extent.osd_data;
640
		if (src->op == CEPH_OSD_OP_WRITE)
641
			ceph_osdc_msg_data_add(req->r_request, osd_data);
642
		else
643
			ceph_osdc_msg_data_add(req->r_reply, osd_data);
644 645 646 647
		break;
	case CEPH_OSD_OP_CALL:
		dst->cls.class_len = src->cls.class_len;
		dst->cls.method_len = src->cls.method_len;
648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663
		osd_data = &src->cls.request_info;
		ceph_osdc_msg_data_add(req->r_request, osd_data);
		BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
		request_data_len = osd_data->pagelist->length;

		osd_data = &src->cls.request_data;
		data_length = ceph_osd_data_length(osd_data);
		if (data_length) {
			BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
			dst->cls.indata_len = cpu_to_le32(data_length);
			ceph_osdc_msg_data_add(req->r_request, osd_data);
			src->payload_len += data_length;
			request_data_len += data_length;
		}
		osd_data = &src->cls.response_data;
		ceph_osdc_msg_data_add(req->r_reply, osd_data);
664 665 666 667 668 669 670 671 672
		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;
673 674 675 676 677 678
	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;
679
	default:
680
		pr_err("unsupported osd opcode %s\n",
681
			ceph_osd_op_name(src->op));
682
		WARN_ON(1);
683 684

		return 0;
685
	}
686

687
	dst->op = cpu_to_le16(src->op);
688
	dst->flags = cpu_to_le32(src->flags);
689
	dst->payload_len = cpu_to_le32(src->payload_len);
690

691
	return request_data_len;
692 693
}

694 695 696 697 698 699 700 701 702 703 704 705 706 707
/*
 * 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,
708
					       u64 off, u64 *plen, int num_ops,
709 710 711 712
					       int opcode, int flags,
					       struct ceph_snap_context *snapc,
					       u32 truncate_seq,
					       u64 truncate_size,
713
					       bool use_mempool)
714
{
715
	struct ceph_osd_request *req;
716 717 718
	u64 objnum = 0;
	u64 objoff = 0;
	u64 objlen = 0;
719 720
	u32 object_size;
	u64 object_base;
721
	int r;
722

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	BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
	       opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
	       opcode != CEPH_OSD_OP_TRUNCATE);
726

727
	req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
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728
					GFP_NOFS);
729
	if (!req)
730
		return ERR_PTR(-ENOMEM);
731

732
	req->r_flags = flags;
733 734

	/* calculate max write size */
735
	r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
736 737
	if (r < 0) {
		ceph_osdc_put_request(req);
738
		return ERR_PTR(r);
739
	}
740

741 742
	object_size = le32_to_cpu(layout->fl_object_size);
	object_base = off - objoff;
743 744 745 746 747 748 749 750
	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;
		}
751
	}
752

753
	osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
754
				truncate_size, truncate_seq);
755

756 757 758 759 760 761
	/*
	 * A second op in the ops array means the caller wants to
	 * also issue a include a 'startsync' command so that the
	 * osd will flush data quickly.
	 */
	if (num_ops > 1)
762
		osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
763

764
	req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
765

766
	snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
767
		 "%llx.%08llx", vino.ino, objnum);
768
	req->r_base_oid.name_len = strlen(req->r_base_oid.name);
769

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	return req;
}
772
EXPORT_SYMBOL(ceph_osdc_new_request);
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/*
 * We keep osd requests in an rbtree, sorted by ->r_tid.
 */
static void __insert_request(struct ceph_osd_client *osdc,
			     struct ceph_osd_request *new)
{
	struct rb_node **p = &osdc->requests.rb_node;
	struct rb_node *parent = NULL;
	struct ceph_osd_request *req = NULL;

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

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

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

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

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

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

839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869
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);
}

870 871 872 873 874 875
/*
 * Resubmit requests pending on the given osd.
 */
static void __kick_osd_requests(struct ceph_osd_client *osdc,
				struct ceph_osd *osd)
{
876
	struct ceph_osd_request *req, *nreq;
877
	LIST_HEAD(resend);
878
	LIST_HEAD(resend_linger);
879 880
	int err;

881
	dout("%s osd%d\n", __func__, osd->o_osd);
882
	err = __reset_osd(osdc, osd);
883
	if (err)
884
		return;
885

886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902
	/*
	 * 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.
	 */
903
	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
904 905
		if (!req->r_sent)
			break;
906 907 908 909 910

		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);
911
			req->r_flags |= CEPH_OSD_FLAG_RETRY;
912 913 914
		} else {
			list_move_tail(&req->r_req_lru_item, &resend_linger);
		}
915
	}
916
	list_splice(&resend, &osdc->req_unsent);
917

918
	/*
919 920 921 922
	 * 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.
923
	 */
924
	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
925
				 r_linger_osd_item) {
926 927
		WARN_ON(!list_empty(&req->r_req_lru_item));
		__kick_linger_request(req);
928
	}
929 930 931

	list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
		__kick_linger_request(req);
932 933
}

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934
/*
935
 * If the osd connection drops, we need to resubmit all requests.
S
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936 937 938 939 940 941 942 943 944 945 946
 */
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
947 948
	mutex_lock(&osdc->request_mutex);
	__kick_osd_requests(osdc, osd);
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949
	__send_queued(osdc);
S
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950
	mutex_unlock(&osdc->request_mutex);
S
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951 952 953 954 955 956
	up_read(&osdc->map_sem);
}

/*
 * Track open sessions with osds.
 */
957
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
S
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958 959 960 961 962 963 964 965 966
{
	struct ceph_osd *osd;

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

	atomic_set(&osd->o_ref, 1);
	osd->o_osdc = osdc;
967
	osd->o_osd = onum;
968
	RB_CLEAR_NODE(&osd->o_node);
S
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969
	INIT_LIST_HEAD(&osd->o_requests);
970
	INIT_LIST_HEAD(&osd->o_linger_requests);
971
	INIT_LIST_HEAD(&osd->o_osd_lru);
S
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972 973
	osd->o_incarnation = 1;

974
	ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
975

976
	INIT_LIST_HEAD(&osd->o_keepalive_item);
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977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995
	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);
996
	if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
S
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997 998
		struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;

999
		ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
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1000
		kfree(osd);
S
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1001
	}
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1002 1003 1004 1005 1006
}

/*
 * remove an osd from our map
 */
1007
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
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1008
{
1009
	dout("__remove_osd %p\n", osd);
S
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1010
	BUG_ON(!list_empty(&osd->o_requests));
1011 1012
	BUG_ON(!list_empty(&osd->o_linger_requests));

S
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1013
	rb_erase(&osd->o_node, &osdc->osds);
1014
	list_del_init(&osd->o_osd_lru);
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1015 1016 1017 1018
	ceph_con_close(&osd->o_con);
	put_osd(osd);
}

1019 1020
static void remove_all_osds(struct ceph_osd_client *osdc)
{
1021
	dout("%s %p\n", __func__, osdc);
1022 1023 1024 1025 1026 1027 1028 1029 1030
	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);
}

1031 1032 1033
static void __move_osd_to_lru(struct ceph_osd_client *osdc,
			      struct ceph_osd *osd)
{
1034
	dout("%s %p\n", __func__, osd);
1035
	BUG_ON(!list_empty(&osd->o_osd_lru));
1036

1037
	list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
1038
	osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
1039 1040
}

1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
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);
}

1051 1052 1053 1054 1055 1056 1057
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);
}

1058
static void remove_old_osds(struct ceph_osd_client *osdc)
1059 1060 1061 1062 1063 1064
{
	struct ceph_osd *osd, *nosd;

	dout("__remove_old_osds %p\n", osdc);
	mutex_lock(&osdc->request_mutex);
	list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
1065
		if (time_before(jiffies, osd->lru_ttl))
1066 1067 1068 1069 1070 1071
			break;
		__remove_osd(osdc, osd);
	}
	mutex_unlock(&osdc->request_mutex);
}

S
Sage Weil 已提交
1072 1073 1074
/*
 * reset osd connect
 */
1075
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
S
Sage Weil 已提交
1076
{
A
Alex Elder 已提交
1077
	struct ceph_entity_addr *peer_addr;
S
Sage Weil 已提交
1078

1079
	dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
1080 1081
	if (list_empty(&osd->o_requests) &&
	    list_empty(&osd->o_linger_requests)) {
1082
		__remove_osd(osdc, osd);
A
Alex Elder 已提交
1083 1084 1085 1086 1087 1088 1089 1090 1091

		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;

1092 1093
		dout("osd addr hasn't changed and connection never opened, "
		     "letting msgr retry\n");
1094 1095 1096
		/* 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
1097 1098

		return -EAGAIN;
S
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1099
	}
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1100 1101 1102 1103 1104 1105

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

	return 0;
S
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1106 1107 1108 1109 1110 1111 1112 1113
}

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

1114
	dout("__insert_osd %p osd%d\n", new, new->o_osd);
S
Sage Weil 已提交
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146
	while (*p) {
		parent = *p;
		osd = rb_entry(parent, struct ceph_osd, o_node);
		if (new->o_osd < osd->o_osd)
			p = &(*p)->rb_left;
		else if (new->o_osd > osd->o_osd)
			p = &(*p)->rb_right;
		else
			BUG();
	}

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

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

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

1147 1148 1149
static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
{
	schedule_delayed_work(&osdc->timeout_work,
1150
			osdc->client->options->osd_keepalive_timeout * HZ);
1151 1152 1153 1154 1155 1156
}

static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
{
	cancel_delayed_work(&osdc->timeout_work);
}
S
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1157 1158 1159 1160 1161

/*
 * Register request, assign tid.  If this is the first request, set up
 * the timeout event.
 */
1162 1163
static void __register_request(struct ceph_osd_client *osdc,
			       struct ceph_osd_request *req)
S
Sage Weil 已提交
1164 1165
{
	req->r_tid = ++osdc->last_tid;
1166
	req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
1167
	dout("__register_request %p tid %lld\n", req, req->r_tid);
S
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1168 1169 1170 1171
	__insert_request(osdc, req);
	ceph_osdc_get_request(req);
	osdc->num_requests++;
	if (osdc->num_requests == 1) {
1172 1173
		dout(" first request, scheduling timeout\n");
		__schedule_osd_timeout(osdc);
S
Sage Weil 已提交
1174
	}
1175 1176
}

S
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1177 1178 1179 1180 1181 1182
/*
 * called under osdc->request_mutex
 */
static void __unregister_request(struct ceph_osd_client *osdc,
				 struct ceph_osd_request *req)
{
1183 1184 1185 1186 1187 1188
	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
1189 1190
	dout("__unregister_request %p tid %lld\n", req, req->r_tid);
	rb_erase(&req->r_node, &osdc->requests);
1191
	RB_CLEAR_NODE(&req->r_node);
S
Sage Weil 已提交
1192 1193
	osdc->num_requests--;

1194 1195
	if (req->r_osd) {
		/* make sure the original request isn't in flight. */
1196
		ceph_msg_revoke(req->r_request);
1197 1198

		list_del_init(&req->r_osd_item);
1199
		maybe_move_osd_to_lru(osdc, req->r_osd);
1200
		if (list_empty(&req->r_linger_osd_item))
1201
			req->r_osd = NULL;
1202
	}
S
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1203

A
Alex Elder 已提交
1204
	list_del_init(&req->r_req_lru_item);
S
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1205 1206
	ceph_osdc_put_request(req);

1207 1208 1209
	if (osdc->num_requests == 0) {
		dout(" no requests, canceling timeout\n");
		__cancel_osd_timeout(osdc);
S
Sage Weil 已提交
1210 1211 1212 1213 1214 1215 1216 1217
	}
}

/*
 * Cancel a previously queued request message
 */
static void __cancel_request(struct ceph_osd_request *req)
{
1218
	if (req->r_sent && req->r_osd) {
1219
		ceph_msg_revoke(req->r_request);
S
Sage Weil 已提交
1220 1221 1222 1223
		req->r_sent = 0;
	}
}

1224 1225 1226
static void __register_linger_request(struct ceph_osd_client *osdc,
				    struct ceph_osd_request *req)
{
1227 1228 1229
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);
	WARN_ON(!req->r_linger);

1230
	ceph_osdc_get_request(req);
1231
	list_add_tail(&req->r_linger_item, &osdc->req_linger);
1232
	if (req->r_osd)
1233
		list_add_tail(&req->r_linger_osd_item,
1234
			      &req->r_osd->o_linger_requests);
1235 1236 1237 1238 1239
}

static void __unregister_linger_request(struct ceph_osd_client *osdc,
					struct ceph_osd_request *req)
{
1240 1241 1242 1243 1244 1245 1246 1247 1248
	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
1249
	list_del_init(&req->r_linger_item);
1250

1251
	if (req->r_osd) {
1252
		list_del_init(&req->r_linger_osd_item);
1253
		maybe_move_osd_to_lru(osdc, req->r_osd);
1254 1255
		if (list_empty(&req->r_osd_item))
			req->r_osd = NULL;
1256
	}
1257 1258

	list_del_init(&req->r_req_lru_item); /* can be on notarget */
1259
	ceph_osdc_put_request(req);
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
}

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);

1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287
/*
 * Returns whether a request should be blocked from being sent
 * based on the current osdmap and osd_client settings.
 *
 * Caller should hold map_sem for read.
 */
static bool __req_should_be_paused(struct ceph_osd_client *osdc,
				   struct ceph_osd_request *req)
{
	bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
	bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
		ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
	return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
		(req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
}

1288 1289 1290 1291 1292 1293 1294
/*
 * Calculate mapping of a request to a PG.  Takes tiering into account.
 */
static int __calc_request_pg(struct ceph_osdmap *osdmap,
			     struct ceph_osd_request *req,
			     struct ceph_pg *pg_out)
{
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
	bool need_check_tiering;

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

	if (need_check_tiering &&
	    (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
1309 1310
		struct ceph_pg_pool_info *pi;

1311
		pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
1312 1313 1314
		if (pi) {
			if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
			    pi->read_tier >= 0)
1315
				req->r_target_oloc.pool = pi->read_tier;
1316 1317
			if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
			    pi->write_tier >= 0)
1318
				req->r_target_oloc.pool = pi->write_tier;
1319 1320 1321 1322
		}
		/* !pi is caught in ceph_oloc_oid_to_pg() */
	}

1323 1324
	return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
				   &req->r_target_oid, pg_out);
1325 1326
}

1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342
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
1343 1344 1345
/*
 * 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
1346
 * no up osd, set r_osd to NULL.  Move the request to the appropriate list
1347
 * (unsent, homeless) or leave on in-flight lru.
S
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1348 1349 1350 1351 1352
 *
 * Return 0 if unchanged, 1 if changed, or negative on error.
 *
 * Caller should hold map_sem for read and request_mutex.
 */
1353
static int __map_request(struct ceph_osd_client *osdc,
1354
			 struct ceph_osd_request *req, int force_resend)
S
Sage Weil 已提交
1355
{
1356
	struct ceph_pg pgid;
1357
	int acting[CEPH_PG_MAX_SIZE];
1358
	int num, o;
S
Sage Weil 已提交
1359
	int err;
1360
	bool was_paused;
S
Sage Weil 已提交
1361

1362
	dout("map_request %p tid %lld\n", req, req->r_tid);
1363 1364

	err = __calc_request_pg(osdc->osdmap, req, &pgid);
1365 1366
	if (err) {
		list_move(&req->r_req_lru_item, &osdc->req_notarget);
S
Sage Weil 已提交
1367
		return err;
1368
	}
1369 1370
	req->r_pgid = pgid;

1371 1372 1373
	num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o);
	if (num < 0)
		num = 0;
S
Sage Weil 已提交
1374

1375 1376 1377 1378 1379
	was_paused = req->r_paused;
	req->r_paused = __req_should_be_paused(osdc, req);
	if (was_paused && !req->r_paused)
		force_resend = 1;

1380 1381
	if ((!force_resend &&
	     req->r_osd && req->r_osd->o_osd == o &&
1382 1383 1384
	     req->r_sent >= req->r_osd->o_incarnation &&
	     req->r_num_pg_osds == num &&
	     memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
1385 1386
	    (req->r_osd == NULL && o == -1) ||
	    req->r_paused)
S
Sage Weil 已提交
1387 1388
		return 0;  /* no change */

1389 1390
	dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
	     req->r_tid, pgid.pool, pgid.seed, o,
S
Sage Weil 已提交
1391 1392
	     req->r_osd ? req->r_osd->o_osd : -1);

1393 1394 1395 1396
	/* record full pg acting set */
	memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
	req->r_num_pg_osds = num;

S
Sage Weil 已提交
1397 1398 1399
	if (req->r_osd) {
		__cancel_request(req);
		list_del_init(&req->r_osd_item);
1400
		list_del_init(&req->r_linger_osd_item);
S
Sage Weil 已提交
1401 1402 1403 1404 1405
		req->r_osd = NULL;
	}

	req->r_osd = __lookup_osd(osdc, o);
	if (!req->r_osd && o >= 0) {
1406
		err = -ENOMEM;
1407
		req->r_osd = create_osd(osdc, o);
1408 1409
		if (!req->r_osd) {
			list_move(&req->r_req_lru_item, &osdc->req_notarget);
1410
			goto out;
1411
		}
S
Sage Weil 已提交
1412

1413
		dout("map_request osd %p is osd%d\n", req->r_osd, o);
S
Sage Weil 已提交
1414 1415
		__insert_osd(osdc, req->r_osd);

1416 1417 1418
		ceph_con_open(&req->r_osd->o_con,
			      CEPH_ENTITY_TYPE_OSD, o,
			      &osdc->osdmap->osd_addr[o]);
S
Sage Weil 已提交
1419 1420
	}

1421
	__enqueue_request(req);
1422
	err = 1;   /* osd or pg changed */
S
Sage Weil 已提交
1423 1424 1425 1426 1427 1428 1429 1430

out:
	return err;
}

/*
 * caller should hold map_sem (for read) and request_mutex
 */
1431 1432
static void __send_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
S
Sage Weil 已提交
1433
{
1434
	void *p;
S
Sage Weil 已提交
1435

1436 1437 1438 1439 1440 1441 1442
	dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
	     req, req->r_tid, req->r_osd->o_osd, req->r_flags,
	     (unsigned long long)req->r_pgid.pool, req->r_pgid.seed);

	/* fill in message content that changes each time we send it */
	put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
	put_unaligned_le32(req->r_flags, req->r_request_flags);
1443
	put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
1444 1445 1446 1447 1448 1449
	p = req->r_request_pgid;
	ceph_encode_64(&p, req->r_pgid.pool);
	ceph_encode_32(&p, req->r_pgid.seed);
	put_unaligned_le64(1, req->r_request_attempts);  /* FIXME */
	memcpy(req->r_request_reassert_version, &req->r_reassert_version,
	       sizeof(req->r_reassert_version));
1450

S
Sage Weil 已提交
1451
	req->r_stamp = jiffies;
1452
	list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
S
Sage Weil 已提交
1453 1454

	ceph_msg_get(req->r_request); /* send consumes a ref */
1455

S
Sage Weil 已提交
1456
	req->r_sent = req->r_osd->o_incarnation;
1457 1458

	ceph_con_send(&req->r_osd->o_con, req->r_request);
S
Sage Weil 已提交
1459 1460
}

1461 1462 1463
/*
 * Send any requests in the queue (req_unsent).
 */
A
Alex Elder 已提交
1464
static void __send_queued(struct ceph_osd_client *osdc)
1465 1466 1467
{
	struct ceph_osd_request *req, *tmp;

A
Alex Elder 已提交
1468 1469
	dout("__send_queued\n");
	list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
1470 1471 1472
		__send_request(osdc, req);
}

1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506
/*
 * Caller should hold map_sem for read and request_mutex.
 */
static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
				     struct ceph_osd_request *req,
				     bool nofail)
{
	int rc;

	__register_request(osdc, req);
	req->r_sent = 0;
	req->r_got_reply = 0;
	rc = __map_request(osdc, req, 0);
	if (rc < 0) {
		if (nofail) {
			dout("osdc_start_request failed map, "
				" will retry %lld\n", req->r_tid);
			rc = 0;
		} else {
			__unregister_request(osdc, req);
		}
		return rc;
	}

	if (req->r_osd == NULL) {
		dout("send_request %p no up osds in pg\n", req);
		ceph_monc_request_next_osdmap(&osdc->client->monc);
	} else {
		__send_queued(osdc);
	}

	return 0;
}

S
Sage Weil 已提交
1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519
/*
 * Timeout callback, called every N seconds when 1 or more osd
 * requests has been active for more than N seconds.  When this
 * happens, we ping all OSDs with requests who have timed out to
 * ensure any communications channel reset is detected.  Reset the
 * request timeouts another N seconds in the future as we go.
 * Reschedule the timeout event another N seconds in future (unless
 * there are no open requests).
 */
static void handle_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client, timeout_work.work);
S
Sage Weil 已提交
1520
	struct ceph_osd_request *req;
S
Sage Weil 已提交
1521
	struct ceph_osd *osd;
1522
	unsigned long keepalive =
1523
		osdc->client->options->osd_keepalive_timeout * HZ;
1524
	struct list_head slow_osds;
S
Sage Weil 已提交
1525 1526 1527 1528 1529 1530 1531
	dout("timeout\n");
	down_read(&osdc->map_sem);

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

	mutex_lock(&osdc->request_mutex);

1532 1533 1534 1535 1536 1537 1538
	/*
	 * ping osds that are a bit slow.  this ensures that if there
	 * is a break in the TCP connection we will notice, and reopen
	 * a connection with that osd (from the fault callback).
	 */
	INIT_LIST_HEAD(&slow_osds);
	list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
S
Sage Weil 已提交
1539
		if (time_before(jiffies, req->r_stamp + keepalive))
1540 1541 1542 1543 1544
			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
1545
		     req->r_tid, osd->o_osd);
1546 1547 1548 1549 1550 1551
		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
1552 1553 1554
		ceph_con_keepalive(&osd->o_con);
	}

1555
	__schedule_osd_timeout(osdc);
A
Alex Elder 已提交
1556
	__send_queued(osdc);
S
Sage Weil 已提交
1557 1558 1559 1560
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
}

1561 1562 1563 1564 1565 1566
static void handle_osds_timeout(struct work_struct *work)
{
	struct ceph_osd_client *osdc =
		container_of(work, struct ceph_osd_client,
			     osds_timeout_work.work);
	unsigned long delay =
1567
		osdc->client->options->osd_idle_ttl * HZ >> 2;
1568 1569 1570

	dout("osds timeout\n");
	down_read(&osdc->map_sem);
1571
	remove_old_osds(osdc);
1572 1573 1574 1575 1576 1577
	up_read(&osdc->map_sem);

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

1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 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 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680
static int ceph_oloc_decode(void **p, void *end,
			    struct ceph_object_locator *oloc)
{
	u8 struct_v, struct_cv;
	u32 len;
	void *struct_end;
	int ret = 0;

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

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

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

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

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

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

e_inval:
	ret = -EINVAL;
	goto out;
}

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

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

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

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

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

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

e_inval:
	ret = -EINVAL;
	goto out;
}

S
Sage Weil 已提交
1681 1682 1683 1684 1685
static void complete_request(struct ceph_osd_request *req)
{
	complete_all(&req->r_safe_completion);  /* fsync waiter */
}

S
Sage Weil 已提交
1686 1687 1688 1689
/*
 * handle osd op reply.  either call the callback if it is specified,
 * or do the completion to wake up the waiting thread.
 */
1690 1691
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
			 struct ceph_connection *con)
S
Sage Weil 已提交
1692
{
1693
	void *p, *end;
S
Sage Weil 已提交
1694
	struct ceph_osd_request *req;
1695
	struct ceph_request_redirect redir;
S
Sage Weil 已提交
1696
	u64 tid;
1697
	int object_len;
1698 1699
	unsigned int numops;
	int payload_len, flags;
1700
	s32 result;
1701 1702 1703 1704 1705 1706
	s32 retry_attempt;
	struct ceph_pg pg;
	int err;
	u32 reassert_epoch;
	u64 reassert_version;
	u32 osdmap_epoch;
1707
	int already_completed;
1708
	u32 bytes;
1709
	unsigned int i;
S
Sage Weil 已提交
1710

1711
	tid = le64_to_cpu(msg->hdr.tid);
1712 1713 1714 1715 1716 1717 1718 1719 1720 1721
	dout("handle_reply %p tid %llu\n", msg, tid);

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

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

1722
	err = ceph_decode_pgid(&p, end, &pg);
1723
	if (err)
S
Sage Weil 已提交
1724
		goto bad;
1725 1726 1727 1728 1729 1730 1731 1732

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

S
Sage Weil 已提交
1733
	/* lookup */
1734
	down_read(&osdc->map_sem);
S
Sage Weil 已提交
1735 1736 1737 1738
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (req == NULL) {
		dout("handle_reply tid %llu dne\n", tid);
1739
		goto bad_mutex;
S
Sage Weil 已提交
1740 1741
	}
	ceph_osdc_get_request(req);
1742 1743 1744 1745

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

1746
	ceph_decode_need(&p, end, 4, bad_put);
1747 1748 1749 1750 1751 1752
	numops = ceph_decode_32(&p);
	if (numops > CEPH_OSD_MAX_OP)
		goto bad_put;
	if (numops != req->r_num_ops)
		goto bad_put;
	payload_len = 0;
1753
	ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
1754 1755 1756 1757 1758 1759 1760 1761 1762 1763
	for (i = 0; i < numops; i++) {
		struct ceph_osd_op *op = p;
		int len;

		len = le32_to_cpu(op->payload_len);
		req->r_reply_op_len[i] = len;
		dout(" op %d has %d bytes\n", i, len);
		payload_len += len;
		p += sizeof(*op);
	}
1764 1765
	bytes = le32_to_cpu(msg->hdr.data_len);
	if (payload_len != bytes) {
1766 1767
		pr_warn("sum of op payload lens %d != data_len %d\n",
			payload_len, bytes);
1768 1769 1770
		goto bad_put;
	}

1771
	ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
1772 1773 1774
	retry_attempt = ceph_decode_32(&p);
	for (i = 0; i < numops; i++)
		req->r_reply_op_result[i] = ceph_decode_32(&p);
S
Sage Weil 已提交
1775

1776 1777 1778
	if (le16_to_cpu(msg->hdr.version) >= 6) {
		p += 8 + 4; /* skip replay_version */
		p += 8; /* skip user_version */
Y
Yan, Zheng 已提交
1779

1780 1781 1782 1783 1784 1785
		err = ceph_redirect_decode(&p, end, &redir);
		if (err)
			goto bad_put;
	} else {
		redir.oloc.pool = -1;
	}
S
Sage Weil 已提交
1786

1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801
	if (redir.oloc.pool != -1) {
		dout("redirect pool %lld\n", redir.oloc.pool);

		__unregister_request(osdc, req);

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

		/*
		 * Start redirect requests with nofail=true.  If
		 * mapping fails, request will end up on the notarget
		 * list, waiting for the new osdmap (which can take
		 * a while), even though the original request mapped
		 * successfully.  In the future we might want to follow
		 * original request's nofail setting here.
		 */
1802
		err = __ceph_osdc_start_request(osdc, req, true);
1803 1804
		BUG_ON(err);

1805
		goto out_unlock;
1806 1807 1808 1809
	}

	already_completed = req->r_got_reply;
	if (!req->r_got_reply) {
1810
		req->r_result = result;
S
Sage Weil 已提交
1811 1812 1813 1814 1815 1816
		dout("handle_reply result %d bytes %d\n", req->r_result,
		     bytes);
		if (req->r_result == 0)
			req->r_result = bytes;

		/* in case this is a write and we need to replay, */
1817 1818
		req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch);
		req->r_reassert_version.version = cpu_to_le64(reassert_version);
S
Sage Weil 已提交
1819 1820 1821 1822

		req->r_got_reply = 1;
	} else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
		dout("handle_reply tid %llu dup ack\n", tid);
1823
		goto out_unlock;
S
Sage Weil 已提交
1824 1825 1826 1827
	}

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

1828 1829 1830
	if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
		__register_linger_request(osdc, req);

S
Sage Weil 已提交
1831
	/* either this is a read, or we got the safe response */
1832 1833
	if (result < 0 ||
	    (flags & CEPH_OSD_FLAG_ONDISK) ||
S
Sage Weil 已提交
1834 1835 1836 1837
	    ((flags & CEPH_OSD_FLAG_WRITE) == 0))
		__unregister_request(osdc, req);

	mutex_unlock(&osdc->request_mutex);
1838
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
1839

Y
Yan, Zheng 已提交
1840
	if (!already_completed) {
1841 1842 1843
		if (req->r_unsafe_callback &&
		    result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
			req->r_unsafe_callback(req, true);
Y
Yan, Zheng 已提交
1844 1845 1846 1847 1848
		if (req->r_callback)
			req->r_callback(req, msg);
		else
			complete_all(&req->r_completion);
	}
S
Sage Weil 已提交
1849

1850 1851 1852
	if (flags & CEPH_OSD_FLAG_ONDISK) {
		if (req->r_unsafe_callback && already_completed)
			req->r_unsafe_callback(req, false);
S
Sage Weil 已提交
1853
		complete_request(req);
1854
	}
S
Sage Weil 已提交
1855

1856
out:
1857
	dout("req=%p req->r_linger=%d\n", req, req->r_linger);
S
Sage Weil 已提交
1858 1859
	ceph_osdc_put_request(req);
	return;
1860 1861 1862 1863
out_unlock:
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
	goto out;
S
Sage Weil 已提交
1864

1865
bad_put:
1866 1867 1868 1869 1870 1871 1872
	req->r_result = -EIO;
	__unregister_request(osdc, req);
	if (req->r_callback)
		req->r_callback(req, msg);
	else
		complete_all(&req->r_completion);
	complete_request(req);
1873
	ceph_osdc_put_request(req);
1874 1875
bad_mutex:
	mutex_unlock(&osdc->request_mutex);
1876
	up_read(&osdc->map_sem);
S
Sage Weil 已提交
1877
bad:
1878 1879
	pr_err("corrupt osd_op_reply got %d %d\n",
	       (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
1880
	ceph_msg_dump(msg);
S
Sage Weil 已提交
1881 1882
}

1883
static void reset_changed_osds(struct ceph_osd_client *osdc)
S
Sage Weil 已提交
1884 1885 1886
{
	struct rb_node *p, *n;

1887 1888
	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
1889

1890 1891 1892 1893 1894 1895 1896
		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
1897
	}
1898 1899 1900
}

/*
1901 1902
 * Requeue requests whose mapping to an OSD has changed.  If requests map to
 * no osd, request a new map.
1903
 *
1904
 * Caller should hold map_sem for read.
1905
 */
1906 1907
static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
			  bool force_resend_writes)
1908
{
1909
	struct ceph_osd_request *req, *nreq;
1910 1911 1912
	struct rb_node *p;
	int needmap = 0;
	int err;
1913
	bool force_resend_req;
1914

1915 1916
	dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
		force_resend_writes ? " (force resend writes)" : "");
1917
	mutex_lock(&osdc->request_mutex);
1918
	for (p = rb_first(&osdc->requests); p; ) {
1919
		req = rb_entry(p, struct ceph_osd_request, r_node);
1920
		p = rb_next(p);
1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933

		/*
		 * 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);
1934
			ceph_osdc_get_request(req);
1935 1936
			__unregister_request(osdc, req);
			__register_linger_request(osdc, req);
1937
			ceph_osdc_put_request(req);
1938 1939 1940
			continue;
		}

1941 1942 1943 1944
		force_resend_req = force_resend ||
			(force_resend_writes &&
				req->r_flags & CEPH_OSD_FLAG_WRITE);
		err = __map_request(osdc, req, force_resend_req);
1945 1946 1947 1948 1949 1950
		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) {
1951 1952 1953 1954
			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);
1955
				req->r_flags |= CEPH_OSD_FLAG_RETRY;
1956 1957
			}
		}
1958 1959 1960 1961 1962 1963
	}

	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);

1964 1965
		err = __map_request(osdc, req,
				    force_resend || force_resend_writes);
1966
		dout("__map_request returned %d\n", err);
1967 1968 1969 1970 1971 1972 1973 1974
		if (err == 0)
			continue;  /* no change and no osd was specified */
		if (err < 0)
			continue;  /* hrm! */
		if (req->r_osd == NULL) {
			dout("tid %llu maps to no valid osd\n", req->r_tid);
			needmap++;  /* request a newer map */
			continue;
1975
		}
1976 1977 1978 1979

		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);
1980
		__unregister_linger_request(osdc, req);
1981
	}
1982
	reset_changed_osds(osdc);
S
Sage Weil 已提交
1983 1984 1985 1986 1987 1988
	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);
	}
1989
}
1990 1991


S
Sage Weil 已提交
1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006
/*
 * 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;
2007
	bool was_full;
S
Sage Weil 已提交
2008 2009 2010 2011 2012 2013 2014 2015

	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));
2016 2017
	if (ceph_check_fsid(osdc->client, &fsid) < 0)
		return;
S
Sage Weil 已提交
2018 2019 2020

	down_write(&osdc->map_sem);

2021 2022
	was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);

S
Sage Weil 已提交
2023 2024 2025 2026 2027
	/* 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);
2028 2029
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
2030 2031 2032 2033 2034 2035 2036
		ceph_decode_need(&p, end, maplen, bad);
		next = p + maplen;
		if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
			dout("applying incremental map %u len %d\n",
			     epoch, maplen);
			newmap = osdmap_apply_incremental(&p, next,
							  osdc->osdmap,
2037
							  &osdc->client->msgr);
S
Sage Weil 已提交
2038 2039 2040 2041
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2042
			BUG_ON(!newmap);
S
Sage Weil 已提交
2043 2044 2045 2046
			if (newmap != osdc->osdmap) {
				ceph_osdmap_destroy(osdc->osdmap);
				osdc->osdmap = newmap;
			}
2047 2048 2049 2050
			was_full = was_full ||
				ceph_osdmap_flag(osdc->osdmap,
						 CEPH_OSDMAP_FULL);
			kick_requests(osdc, 0, was_full);
S
Sage Weil 已提交
2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065
		} 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);
2066 2067
		epoch = ceph_decode_32(&p);
		maplen = ceph_decode_32(&p);
S
Sage Weil 已提交
2068 2069 2070 2071 2072 2073 2074 2075 2076
		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 {
2077 2078
			int skipped_map = 0;

S
Sage Weil 已提交
2079
			dout("taking full map %u len %d\n", epoch, maplen);
2080
			newmap = ceph_osdmap_decode(&p, p+maplen);
S
Sage Weil 已提交
2081 2082 2083 2084
			if (IS_ERR(newmap)) {
				err = PTR_ERR(newmap);
				goto bad;
			}
2085
			BUG_ON(!newmap);
S
Sage Weil 已提交
2086 2087
			oldmap = osdc->osdmap;
			osdc->osdmap = newmap;
2088 2089 2090
			if (oldmap) {
				if (oldmap->epoch + 1 < newmap->epoch)
					skipped_map = 1;
S
Sage Weil 已提交
2091
				ceph_osdmap_destroy(oldmap);
2092
			}
2093 2094 2095 2096
			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
2097 2098 2099 2100 2101
		}
		p += maplen;
		nr_maps--;
	}

2102 2103
	if (!osdc->osdmap)
		goto bad;
S
Sage Weil 已提交
2104 2105 2106
done:
	downgrade_write(&osdc->map_sem);
	ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
2107 2108 2109 2110 2111 2112

	/*
	 * subscribe to subsequent osdmap updates if full to ensure
	 * we find out when we are no longer full and stop returning
	 * ENOSPC.
	 */
2113 2114 2115
	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))
2116 2117
		ceph_monc_request_next_osdmap(&osdc->client->monc);

A
Alex Elder 已提交
2118 2119 2120
	mutex_lock(&osdc->request_mutex);
	__send_queued(osdc);
	mutex_unlock(&osdc->request_mutex);
S
Sage Weil 已提交
2121
	up_read(&osdc->map_sem);
2122
	wake_up_all(&osdc->client->auth_wq);
S
Sage Weil 已提交
2123 2124 2125 2126
	return;

bad:
	pr_err("osdc handle_map corrupt msg\n");
2127
	ceph_msg_dump(msg);
S
Sage Weil 已提交
2128 2129 2130
	up_write(&osdc->map_sem);
}

2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212
/*
 * 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 *),
2213
			   void *data, struct ceph_osd_event **pevent)
2214 2215 2216 2217 2218 2219 2220 2221 2222
{
	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;
2223
	event->one_shot = 0;
2224 2225 2226
	event->data = data;
	event->osdc = osdc;
	INIT_LIST_HEAD(&event->osd_node);
2227
	RB_CLEAR_NODE(&event->node);
2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273
	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
 */
2274 2275
static void handle_watch_notify(struct ceph_osd_client *osdc,
				struct ceph_msg *msg)
2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295
{
	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) {
2296
		BUG_ON(event->one_shot);
2297 2298 2299 2300 2301 2302 2303 2304
		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) {
2305 2306 2307
			pr_err("couldn't allocate event_work\n");
			ceph_osdc_put_event(event);
			return;
2308
		}
2309
		INIT_WORK(&event_work->work, do_event_work);
2310 2311 2312 2313 2314
		event_work->event = event;
		event_work->ver = ver;
		event_work->notify_id = notify_id;
		event_work->opcode = opcode;

2315 2316
		queue_work(osdc->notify_wq, &event_work->work);
	}
2317 2318 2319 2320 2321 2322 2323

	return;

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

2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371
/*
 * build new request AND message
 *
 */
void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
				struct ceph_snap_context *snapc, u64 snap_id,
				struct timespec *mtime)
{
	struct ceph_msg *msg = req->r_request;
	void *p;
	size_t msg_size;
	int flags = req->r_flags;
	u64 data_len;
	unsigned int i;

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

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

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

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

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

	/* oid */
2372 2373 2374 2375 2376
	ceph_encode_32(&p, req->r_base_oid.name_len);
	memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
	dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
	     req->r_base_oid.name, req->r_base_oid.name_len);
	p += req->r_base_oid.name_len;
2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422

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

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

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

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

		/*
		 * The header "data_off" is a hint to the receiver
		 * allowing it to align received data into its
		 * buffers such that there's no need to re-copy
		 * it before writing it to disk (direct I/O).
		 */
		data_off = (u16) (off & 0xffff);
		req->r_request->hdr.data_off = cpu_to_le16(data_off);
	}
	req->r_request->hdr.data_len = cpu_to_le32(data_len);

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

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

2423 2424 2425 2426 2427 2428 2429
/*
 * Register request, send initial attempt.
 */
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
			    struct ceph_osd_request *req,
			    bool nofail)
{
2430
	int rc;
2431

S
Sage Weil 已提交
2432 2433
	down_read(&osdc->map_sem);
	mutex_lock(&osdc->request_mutex);
2434 2435 2436

	rc = __ceph_osdc_start_request(osdc, req, nofail);

S
Sage Weil 已提交
2437 2438
	mutex_unlock(&osdc->request_mutex);
	up_read(&osdc->map_sem);
2439

S
Sage Weil 已提交
2440 2441
	return rc;
}
2442
EXPORT_SYMBOL(ceph_osdc_start_request);
S
Sage Weil 已提交
2443

2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462
/*
 * 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
2463 2464 2465 2466 2467 2468 2469 2470
/*
 * wait for a request to complete
 */
int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
			   struct ceph_osd_request *req)
{
	int rc;

2471 2472
	dout("%s %p tid %llu\n", __func__, req, req->r_tid);

S
Sage Weil 已提交
2473 2474
	rc = wait_for_completion_interruptible(&req->r_completion);
	if (rc < 0) {
2475 2476
		dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid);
		ceph_osdc_cancel_request(req);
S
Sage Weil 已提交
2477
		complete_request(req);
S
Sage Weil 已提交
2478 2479 2480
		return rc;
	}

2481 2482
	dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid,
	     req->r_result);
S
Sage Weil 已提交
2483 2484
	return req->r_result;
}
2485
EXPORT_SYMBOL(ceph_osdc_wait_request);
S
Sage Weil 已提交
2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518

/*
 * 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);
}
2519
EXPORT_SYMBOL(ceph_osdc_sync);
S
Sage Weil 已提交
2520

2521 2522 2523 2524
/*
 * 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
2525
void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
2526 2527 2528 2529 2530 2531
{
	flush_workqueue(osdc->notify_wq);
}
EXPORT_SYMBOL(ceph_osdc_flush_notifies);


S
Sage Weil 已提交
2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547
/*
 * init, shutdown
 */
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
{
	int err;

	dout("init\n");
	osdc->client = client;
	osdc->osdmap = NULL;
	init_rwsem(&osdc->map_sem);
	init_completion(&osdc->map_waiters);
	osdc->last_requested_map = 0;
	mutex_init(&osdc->request_mutex);
	osdc->last_tid = 0;
	osdc->osds = RB_ROOT;
2548
	INIT_LIST_HEAD(&osdc->osd_lru);
S
Sage Weil 已提交
2549
	osdc->requests = RB_ROOT;
2550
	INIT_LIST_HEAD(&osdc->req_lru);
2551 2552
	INIT_LIST_HEAD(&osdc->req_unsent);
	INIT_LIST_HEAD(&osdc->req_notarget);
2553
	INIT_LIST_HEAD(&osdc->req_linger);
S
Sage Weil 已提交
2554 2555
	osdc->num_requests = 0;
	INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
2556
	INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
2557 2558 2559
	spin_lock_init(&osdc->event_lock);
	osdc->event_tree = RB_ROOT;
	osdc->event_count = 0;
2560 2561

	schedule_delayed_work(&osdc->osds_timeout_work,
2562
	   round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
S
Sage Weil 已提交
2563

2564
	err = -ENOMEM;
S
Sage Weil 已提交
2565 2566 2567
	osdc->req_mempool = mempool_create_kmalloc_pool(10,
					sizeof(struct ceph_osd_request));
	if (!osdc->req_mempool)
2568
		goto out;
S
Sage Weil 已提交
2569

2570 2571
	err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
				OSD_OP_FRONT_LEN, 10, true,
2572
				"osd_op");
S
Sage Weil 已提交
2573
	if (err < 0)
2574
		goto out_mempool;
2575
	err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
2576 2577
				OSD_OPREPLY_FRONT_LEN, 10, true,
				"osd_op_reply");
S
Sage Weil 已提交
2578 2579
	if (err < 0)
		goto out_msgpool;
2580

2581
	err = -ENOMEM;
2582
	osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
2583
	if (!osdc->notify_wq)
2584 2585
		goto out_msgpool_reply;

S
Sage Weil 已提交
2586
	return 0;
2587

2588 2589
out_msgpool_reply:
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2590 2591
out_msgpool:
	ceph_msgpool_destroy(&osdc->msgpool_op);
2592 2593 2594 2595
out_mempool:
	mempool_destroy(osdc->req_mempool);
out:
	return err;
S
Sage Weil 已提交
2596 2597 2598 2599
}

void ceph_osdc_stop(struct ceph_osd_client *osdc)
{
2600 2601
	flush_workqueue(osdc->notify_wq);
	destroy_workqueue(osdc->notify_wq);
S
Sage Weil 已提交
2602
	cancel_delayed_work_sync(&osdc->timeout_work);
2603
	cancel_delayed_work_sync(&osdc->osds_timeout_work);
S
Sage Weil 已提交
2604 2605 2606 2607
	if (osdc->osdmap) {
		ceph_osdmap_destroy(osdc->osdmap);
		osdc->osdmap = NULL;
	}
2608
	remove_all_osds(osdc);
S
Sage Weil 已提交
2609 2610
	mempool_destroy(osdc->req_mempool);
	ceph_msgpool_destroy(&osdc->msgpool_op);
S
Sage Weil 已提交
2611
	ceph_msgpool_destroy(&osdc->msgpool_op_reply);
S
Sage Weil 已提交
2612 2613 2614 2615 2616 2617 2618 2619 2620 2621
}

/*
 * 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,
2622
			struct page **pages, int num_pages, int page_align)
S
Sage Weil 已提交
2623 2624 2625 2626 2627 2628
{
	struct ceph_osd_request *req;
	int rc = 0;

	dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
	     vino.snap, off, *plen);
2629
	req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 1,
S
Sage Weil 已提交
2630
				    CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
2631
				    NULL, truncate_seq, truncate_size,
2632
				    false);
2633 2634
	if (IS_ERR(req))
		return PTR_ERR(req);
S
Sage Weil 已提交
2635 2636

	/* it may be a short read due to an object boundary */
2637

2638
	osd_req_op_extent_osd_data_pages(req, 0,
2639
				pages, *plen, page_align, false, false);
S
Sage Weil 已提交
2640

2641
	dout("readpages  final extent is %llu~%llu (%llu bytes align %d)\n",
2642
	     off, *plen, *plen, page_align);
S
Sage Weil 已提交
2643

2644
	ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
2645

S
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2646 2647 2648 2649 2650 2651 2652 2653
	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;
}
2654
EXPORT_SYMBOL(ceph_osdc_readpages);
S
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2655 2656 2657 2658 2659 2660 2661 2662 2663 2664

/*
 * 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,
2665
			 struct page **pages, int num_pages)
S
Sage Weil 已提交
2666 2667 2668
{
	struct ceph_osd_request *req;
	int rc = 0;
2669
	int page_align = off & ~PAGE_MASK;
S
Sage Weil 已提交
2670

2671
	BUG_ON(vino.snap != CEPH_NOSNAP);	/* snapshots aren't writeable */
2672
	req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
S
Sage Weil 已提交
2673
				    CEPH_OSD_OP_WRITE,
2674
				    CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
2675
				    snapc, truncate_seq, truncate_size,
2676
				    true);
2677 2678
	if (IS_ERR(req))
		return PTR_ERR(req);
S
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2679 2680

	/* it may be a short write due to an object boundary */
2681
	osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
2682 2683
				false, false);
	dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
S
Sage Weil 已提交
2684

2685
	ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
2686

2687
	rc = ceph_osdc_start_request(osdc, req, true);
S
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2688 2689 2690 2691 2692 2693 2694 2695 2696
	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;
}
2697
EXPORT_SYMBOL(ceph_osdc_writepages);
S
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2698

2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718
int ceph_osdc_setup(void)
{
	BUG_ON(ceph_osd_request_cache);
	ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
					sizeof (struct ceph_osd_request),
					__alignof__(struct ceph_osd_request),
					0, NULL);

	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
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2719 2720 2721 2722 2723 2724
/*
 * handle incoming message
 */
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
{
	struct ceph_osd *osd = con->private;
2725
	struct ceph_osd_client *osdc;
S
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2726 2727 2728
	int type = le16_to_cpu(msg->hdr.type);

	if (!osd)
S
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2729
		goto out;
2730
	osdc = osd->o_osdc;
S
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2731 2732 2733 2734 2735 2736

	switch (type) {
	case CEPH_MSG_OSD_MAP:
		ceph_osdc_handle_map(osdc, msg);
		break;
	case CEPH_MSG_OSD_OPREPLY:
2737
		handle_reply(osdc, msg, con);
S
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2738
		break;
2739 2740 2741
	case CEPH_MSG_WATCH_NOTIFY:
		handle_watch_notify(osdc, msg);
		break;
S
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2742 2743 2744 2745 2746

	default:
		pr_err("received unknown message type %d %s\n", type,
		       ceph_msg_type_name(type));
	}
S
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2747
out:
S
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2748 2749 2750
	ceph_msg_put(msg);
}

2751
/*
2752 2753
 * lookup and return message for incoming reply.  set up reply message
 * pages.
2754 2755
 */
static struct ceph_msg *get_reply(struct ceph_connection *con,
2756 2757
				  struct ceph_msg_header *hdr,
				  int *skip)
S
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2758 2759 2760
{
	struct ceph_osd *osd = con->private;
	struct ceph_osd_client *osdc = osd->o_osdc;
2761
	struct ceph_msg *m;
2762
	struct ceph_osd_request *req;
2763
	int front_len = le32_to_cpu(hdr->front_len);
2764
	int data_len = le32_to_cpu(hdr->data_len);
2765
	u64 tid;
S
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2766

2767 2768 2769 2770 2771 2772
	tid = le64_to_cpu(hdr->tid);
	mutex_lock(&osdc->request_mutex);
	req = __lookup_request(osdc, tid);
	if (!req) {
		*skip = 1;
		m = NULL;
2773 2774
		dout("get_reply unknown tid %llu from osd%d\n", tid,
		     osd->o_osd);
2775 2776
		goto out;
	}
S
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2777

2778
	if (req->r_reply->con)
2779
		dout("%s revoking msg %p from old con %p\n", __func__,
2780 2781
		     req->r_reply, req->r_reply->con);
	ceph_msg_revoke_incoming(req->r_reply);
2782

2783
	if (front_len > req->r_reply->front_alloc_len) {
2784 2785 2786 2787
		pr_warn("get_reply front %d > preallocated %d (%u#%llu)\n",
			front_len, req->r_reply->front_alloc_len,
			(unsigned int)con->peer_name.type,
			le64_to_cpu(con->peer_name.num));
2788 2789
		m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
				 false);
2790
		if (!m)
S
Sage Weil 已提交
2791 2792 2793 2794 2795 2796
			goto out;
		ceph_msg_put(req->r_reply);
		req->r_reply = m;
	}
	m = ceph_msg_get(req->r_reply);

2797
	if (data_len > 0) {
2798
		struct ceph_osd_data *osd_data;
2799

2800 2801 2802 2803 2804
		/*
		 * XXX This is assuming there is only one op containing
		 * XXX page data.  Probably OK for reads, but this
		 * XXX ought to be done more generally.
		 */
2805
		osd_data = osd_req_op_extent_osd_data(req, 0);
2806 2807
		if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
			if (osd_data->pages &&
2808
				unlikely(osd_data->length < data_len)) {
2809

2810
				pr_warn("tid %lld reply has %d bytes we had only %llu bytes ready\n",
2811
					tid, data_len, osd_data->length);
2812 2813 2814 2815 2816 2817
				*skip = 1;
				ceph_msg_put(m);
				m = NULL;
				goto out;
			}
		}
2818
	}
2819
	*skip = 0;
S
Sage Weil 已提交
2820
	dout("get_reply tid %lld %p\n", tid, m);
2821 2822 2823

out:
	mutex_unlock(&osdc->request_mutex);
2824
	return m;
2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835

}

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
2836
	*skip = 0;
2837 2838
	switch (type) {
	case CEPH_MSG_OSD_MAP:
2839
	case CEPH_MSG_WATCH_NOTIFY:
2840
		return ceph_msg_new(type, front, GFP_NOFS, false);
2841 2842 2843 2844 2845 2846 2847 2848
	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
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2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867
}

/*
 * 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);
}

2868 2869 2870
/*
 * authentication
 */
2871 2872 2873 2874 2875
/*
 * 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,
2876
					int *proto, int force_new)
2877 2878 2879 2880
{
	struct ceph_osd *o = con->private;
	struct ceph_osd_client *osdc = o->o_osdc;
	struct ceph_auth_client *ac = osdc->client->monc.auth;
2881
	struct ceph_auth_handshake *auth = &o->o_auth;
2882

2883
	if (force_new && auth->authorizer) {
2884
		ceph_auth_destroy_authorizer(ac, auth->authorizer);
2885 2886
		auth->authorizer = NULL;
	}
2887 2888 2889
	if (!auth->authorizer) {
		int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
						      auth);
2890
		if (ret)
2891
			return ERR_PTR(ret);
2892 2893
	} else {
		int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
2894 2895 2896
						     auth);
		if (ret)
			return ERR_PTR(ret);
2897 2898
	}
	*proto = ac->protocol;
2899

2900
	return auth;
2901 2902 2903 2904 2905 2906 2907 2908 2909
}


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;

2910
	return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
2911 2912
}

2913 2914 2915 2916 2917 2918
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;

2919
	ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
2920 2921
	return ceph_monc_validate_auth(&osdc->client->monc);
}
2922

2923
static const struct ceph_connection_operations osd_con_ops = {
S
Sage Weil 已提交
2924 2925 2926
	.get = get_osd_con,
	.put = put_osd_con,
	.dispatch = dispatch,
2927 2928
	.get_authorizer = get_authorizer,
	.verify_authorizer_reply = verify_authorizer_reply,
2929
	.invalidate_authorizer = invalidate_authorizer,
S
Sage Weil 已提交
2930
	.alloc_msg = alloc_msg,
2931
	.fault = osd_reset,
S
Sage Weil 已提交
2932
};