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- #include <linux/ceph/ceph_debug.h>
- #include <linux/module.h>
- #include <linux/err.h>
- #include <linux/highmem.h>
- #include <linux/mm.h>
- #include <linux/pagemap.h>
- #include <linux/slab.h>
- #include <linux/uaccess.h>
- #ifdef CONFIG_BLOCK
- #include <linux/bio.h>
- #endif
- #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>
- #define OSD_OPREPLY_FRONT_LEN 512
- static struct kmem_cache *ceph_osd_request_cache;
- static const struct ceph_connection_operations osd_con_ops;
- /*
- * 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.
- */
- static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req);
- static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req);
- static void link_linger(struct ceph_osd *osd,
- struct ceph_osd_linger_request *lreq);
- static void unlink_linger(struct ceph_osd *osd,
- struct ceph_osd_linger_request *lreq);
- #if 1
- static inline bool rwsem_is_wrlocked(struct rw_semaphore *sem)
- {
- bool wrlocked = true;
- if (unlikely(down_read_trylock(sem))) {
- wrlocked = false;
- up_read(sem);
- }
- return wrlocked;
- }
- static inline void verify_osdc_locked(struct ceph_osd_client *osdc)
- {
- WARN_ON(!rwsem_is_locked(&osdc->lock));
- }
- static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc)
- {
- WARN_ON(!rwsem_is_wrlocked(&osdc->lock));
- }
- static inline void verify_osd_locked(struct ceph_osd *osd)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- WARN_ON(!(mutex_is_locked(&osd->lock) &&
- rwsem_is_locked(&osdc->lock)) &&
- !rwsem_is_wrlocked(&osdc->lock));
- }
- static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq)
- {
- WARN_ON(!mutex_is_locked(&lreq->lock));
- }
- #else
- static inline void verify_osdc_locked(struct ceph_osd_client *osdc) { }
- static inline void verify_osdc_wrlocked(struct ceph_osd_client *osdc) { }
- static inline void verify_osd_locked(struct ceph_osd *osd) { }
- static inline void verify_lreq_locked(struct ceph_osd_linger_request *lreq) { }
- #endif
- /*
- * 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.
- */
- static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
- u64 *objnum, u64 *objoff, u64 *objlen)
- {
- u64 orig_len = *plen;
- int r;
- /* object extent? */
- r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
- objoff, objlen);
- if (r < 0)
- return r;
- if (*objlen < orig_len) {
- *plen = *objlen;
- dout(" skipping last %llu, final file extent %llu~%llu\n",
- orig_len - *plen, off, *plen);
- }
- dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
- return 0;
- }
- 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;
- }
- static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
- 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;
- }
- static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
- struct ceph_pagelist *pagelist)
- {
- osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
- osd_data->pagelist = pagelist;
- }
- #ifdef CONFIG_BLOCK
- static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
- 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 */
- #define osd_req_op_data(oreq, whch, typ, fld) \
- ({ \
- struct ceph_osd_request *__oreq = (oreq); \
- unsigned int __whch = (whch); \
- BUG_ON(__whch >= __oreq->r_num_ops); \
- &__oreq->r_ops[__whch].typ.fld; \
- })
- 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;
- }
- struct ceph_osd_data *
- osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
- unsigned int which)
- {
- return osd_req_op_data(osd_req, which, extent, osd_data);
- }
- EXPORT_SYMBOL(osd_req_op_extent_osd_data);
- 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);
- void osd_req_op_extent_osd_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, extent, osd_data);
- 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,
- unsigned int which, struct ceph_pagelist *pagelist)
- {
- struct ceph_osd_data *osd_data;
- osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
- 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,
- unsigned int which, struct bio *bio, size_t bio_length)
- {
- struct ceph_osd_data *osd_data;
- osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
- ceph_osd_data_bio_init(osd_data, bio, bio_length);
- }
- EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
- #endif /* CONFIG_BLOCK */
- static void osd_req_op_cls_request_info_pagelist(
- struct ceph_osd_request *osd_req,
- unsigned int which, struct ceph_pagelist *pagelist)
- {
- struct ceph_osd_data *osd_data;
- osd_data = osd_req_op_data(osd_req, which, cls, request_info);
- ceph_osd_data_pagelist_init(osd_data, pagelist);
- }
- void osd_req_op_cls_request_data_pagelist(
- struct ceph_osd_request *osd_req,
- unsigned int which, struct ceph_pagelist *pagelist)
- {
- struct ceph_osd_data *osd_data;
- osd_data = osd_req_op_data(osd_req, which, cls, request_data);
- ceph_osd_data_pagelist_init(osd_data, pagelist);
- osd_req->r_ops[which].cls.indata_len += pagelist->length;
- osd_req->r_ops[which].indata_len += pagelist->length;
- }
- EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
- 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);
- osd_req->r_ops[which].cls.indata_len += length;
- osd_req->r_ops[which].indata_len += length;
- }
- EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
- void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
- unsigned int which, struct page **pages, u64 length,
- u32 alignment, bool pages_from_pool, bool own_pages)
- {
- struct ceph_osd_data *osd_data;
- osd_data = osd_req_op_data(osd_req, which, cls, response_data);
- ceph_osd_data_pages_init(osd_data, pages, length, alignment,
- pages_from_pool, own_pages);
- }
- EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
- 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;
- }
- }
- static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
- {
- if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
- 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);
- }
- 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:
- case CEPH_OSD_OP_WRITEFULL:
- ceph_osd_data_release(&op->extent.osd_data);
- break;
- case CEPH_OSD_OP_CALL:
- ceph_osd_data_release(&op->cls.request_info);
- ceph_osd_data_release(&op->cls.request_data);
- ceph_osd_data_release(&op->cls.response_data);
- break;
- case CEPH_OSD_OP_SETXATTR:
- case CEPH_OSD_OP_CMPXATTR:
- ceph_osd_data_release(&op->xattr.osd_data);
- break;
- case CEPH_OSD_OP_STAT:
- ceph_osd_data_release(&op->raw_data_in);
- break;
- case CEPH_OSD_OP_NOTIFY_ACK:
- ceph_osd_data_release(&op->notify_ack.request_data);
- break;
- case CEPH_OSD_OP_NOTIFY:
- ceph_osd_data_release(&op->notify.request_data);
- ceph_osd_data_release(&op->notify.response_data);
- break;
- case CEPH_OSD_OP_LIST_WATCHERS:
- ceph_osd_data_release(&op->list_watchers.response_data);
- break;
- default:
- break;
- }
- }
- /*
- * Assumes @t is zero-initialized.
- */
- static void target_init(struct ceph_osd_request_target *t)
- {
- ceph_oid_init(&t->base_oid);
- ceph_oloc_init(&t->base_oloc);
- ceph_oid_init(&t->target_oid);
- ceph_oloc_init(&t->target_oloc);
- ceph_osds_init(&t->acting);
- ceph_osds_init(&t->up);
- t->size = -1;
- t->min_size = -1;
- t->osd = CEPH_HOMELESS_OSD;
- }
- static void target_copy(struct ceph_osd_request_target *dest,
- const struct ceph_osd_request_target *src)
- {
- ceph_oid_copy(&dest->base_oid, &src->base_oid);
- ceph_oloc_copy(&dest->base_oloc, &src->base_oloc);
- ceph_oid_copy(&dest->target_oid, &src->target_oid);
- ceph_oloc_copy(&dest->target_oloc, &src->target_oloc);
- dest->pgid = src->pgid; /* struct */
- dest->pg_num = src->pg_num;
- dest->pg_num_mask = src->pg_num_mask;
- ceph_osds_copy(&dest->acting, &src->acting);
- ceph_osds_copy(&dest->up, &src->up);
- dest->size = src->size;
- dest->min_size = src->min_size;
- dest->sort_bitwise = src->sort_bitwise;
- dest->flags = src->flags;
- dest->paused = src->paused;
- dest->osd = src->osd;
- }
- static void target_destroy(struct ceph_osd_request_target *t)
- {
- ceph_oid_destroy(&t->base_oid);
- ceph_oloc_destroy(&t->base_oloc);
- ceph_oid_destroy(&t->target_oid);
- ceph_oloc_destroy(&t->target_oloc);
- }
- /*
- * requests
- */
- static void request_release_checks(struct ceph_osd_request *req)
- {
- WARN_ON(!RB_EMPTY_NODE(&req->r_node));
- WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
- WARN_ON(!list_empty(&req->r_unsafe_item));
- WARN_ON(req->r_osd);
- }
- static void ceph_osdc_release_request(struct kref *kref)
- {
- struct ceph_osd_request *req = container_of(kref,
- struct ceph_osd_request, r_kref);
- unsigned int which;
- dout("%s %p (r_request %p r_reply %p)\n", __func__, req,
- req->r_request, req->r_reply);
- request_release_checks(req);
- if (req->r_request)
- ceph_msg_put(req->r_request);
- if (req->r_reply)
- ceph_msg_put(req->r_reply);
- for (which = 0; which < req->r_num_ops; which++)
- osd_req_op_data_release(req, which);
- target_destroy(&req->r_t);
- ceph_put_snap_context(req->r_snapc);
- if (req->r_mempool)
- mempool_free(req, req->r_osdc->req_mempool);
- else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS)
- kmem_cache_free(ceph_osd_request_cache, req);
- else
- kfree(req);
- }
- 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)
- {
- if (req) {
- dout("%s %p (was %d)\n", __func__, req,
- atomic_read(&req->r_kref.refcount));
- kref_put(&req->r_kref, ceph_osdc_release_request);
- }
- }
- EXPORT_SYMBOL(ceph_osdc_put_request);
- static void request_init(struct ceph_osd_request *req)
- {
- /* req only, each op is zeroed in _osd_req_op_init() */
- memset(req, 0, sizeof(*req));
- kref_init(&req->r_kref);
- init_completion(&req->r_completion);
- init_completion(&req->r_safe_completion);
- RB_CLEAR_NODE(&req->r_node);
- RB_CLEAR_NODE(&req->r_mc_node);
- INIT_LIST_HEAD(&req->r_unsafe_item);
- target_init(&req->r_t);
- }
- /*
- * This is ugly, but it allows us to reuse linger registration and ping
- * requests, keeping the structure of the code around send_linger{_ping}()
- * reasonable. Setting up a min_nr=2 mempool for each linger request
- * and dealing with copying ops (this blasts req only, watch op remains
- * intact) isn't any better.
- */
- static void request_reinit(struct ceph_osd_request *req)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- bool mempool = req->r_mempool;
- unsigned int num_ops = req->r_num_ops;
- u64 snapid = req->r_snapid;
- struct ceph_snap_context *snapc = req->r_snapc;
- bool linger = req->r_linger;
- struct ceph_msg *request_msg = req->r_request;
- struct ceph_msg *reply_msg = req->r_reply;
- dout("%s req %p\n", __func__, req);
- WARN_ON(atomic_read(&req->r_kref.refcount) != 1);
- request_release_checks(req);
- WARN_ON(atomic_read(&request_msg->kref.refcount) != 1);
- WARN_ON(atomic_read(&reply_msg->kref.refcount) != 1);
- target_destroy(&req->r_t);
- request_init(req);
- req->r_osdc = osdc;
- req->r_mempool = mempool;
- req->r_num_ops = num_ops;
- req->r_snapid = snapid;
- req->r_snapc = snapc;
- req->r_linger = linger;
- req->r_request = request_msg;
- req->r_reply = reply_msg;
- }
- struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
- struct ceph_snap_context *snapc,
- unsigned int num_ops,
- bool use_mempool,
- gfp_t gfp_flags)
- {
- struct ceph_osd_request *req;
- if (use_mempool) {
- BUG_ON(num_ops > CEPH_OSD_SLAB_OPS);
- req = mempool_alloc(osdc->req_mempool, gfp_flags);
- } else if (num_ops <= CEPH_OSD_SLAB_OPS) {
- req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags);
- } else {
- BUG_ON(num_ops > CEPH_OSD_MAX_OPS);
- req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]),
- gfp_flags);
- }
- if (unlikely(!req))
- return NULL;
- request_init(req);
- req->r_osdc = osdc;
- req->r_mempool = use_mempool;
- req->r_num_ops = num_ops;
- req->r_snapid = CEPH_NOSNAP;
- req->r_snapc = ceph_get_snap_context(snapc);
- dout("%s req %p\n", __func__, req);
- return req;
- }
- EXPORT_SYMBOL(ceph_osdc_alloc_request);
- static int ceph_oloc_encoding_size(struct ceph_object_locator *oloc)
- {
- return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0);
- }
- int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_msg *msg;
- int msg_size;
- WARN_ON(ceph_oid_empty(&req->r_base_oid));
- WARN_ON(ceph_oloc_empty(&req->r_base_oloc));
- /* create request message */
- msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */
- msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */
- msg_size += CEPH_ENCODING_START_BLK_LEN +
- ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */
- msg_size += 1 + 8 + 4 + 4; /* pgid */
- msg_size += 4 + req->r_base_oid.name_len; /* oid */
- msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op);
- msg_size += 8; /* snapid */
- msg_size += 8; /* snap_seq */
- msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0);
- msg_size += 4; /* retry_attempt */
- if (req->r_mempool)
- msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
- else
- msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true);
- if (!msg)
- return -ENOMEM;
- memset(msg->front.iov_base, 0, msg->front.iov_len);
- req->r_request = msg;
- /* create reply message */
- msg_size = OSD_OPREPLY_FRONT_LEN;
- msg_size += req->r_base_oid.name_len;
- msg_size += req->r_num_ops * sizeof(struct ceph_osd_op);
- if (req->r_mempool)
- msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
- else
- msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true);
- if (!msg)
- return -ENOMEM;
- req->r_reply = msg;
- return 0;
- }
- EXPORT_SYMBOL(ceph_osdc_alloc_messages);
- static bool osd_req_opcode_valid(u16 opcode)
- {
- switch (opcode) {
- #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true;
- __CEPH_FORALL_OSD_OPS(GENERATE_CASE)
- #undef GENERATE_CASE
- default:
- return false;
- }
- }
- /*
- * 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.
- */
- static struct ceph_osd_req_op *
- _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
- u16 opcode, u32 flags)
- {
- struct ceph_osd_req_op *op;
- BUG_ON(which >= osd_req->r_num_ops);
- BUG_ON(!osd_req_opcode_valid(opcode));
- op = &osd_req->r_ops[which];
- memset(op, 0, sizeof (*op));
- op->op = opcode;
- op->flags = flags;
- return op;
- }
- void osd_req_op_init(struct ceph_osd_request *osd_req,
- unsigned int which, u16 opcode, u32 flags)
- {
- (void)_osd_req_op_init(osd_req, which, opcode, flags);
- }
- EXPORT_SYMBOL(osd_req_op_init);
- void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
- unsigned int which, u16 opcode,
- u64 offset, u64 length,
- u64 truncate_size, u32 truncate_seq)
- {
- struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
- opcode, 0);
- size_t payload_len = 0;
- BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
- opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
- opcode != CEPH_OSD_OP_TRUNCATE);
- 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 || opcode == CEPH_OSD_OP_WRITEFULL)
- payload_len += length;
- op->indata_len = payload_len;
- }
- EXPORT_SYMBOL(osd_req_op_extent_init);
- void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
- unsigned int which, u64 length)
- {
- 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;
- if (length == previous)
- return; /* Nothing to do */
- BUG_ON(length > previous);
- op->extent.length = length;
- if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
- op->indata_len -= previous - length;
- }
- EXPORT_SYMBOL(osd_req_op_extent_update);
- void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
- unsigned int which, u64 offset_inc)
- {
- struct ceph_osd_req_op *op, *prev_op;
- BUG_ON(which + 1 >= osd_req->r_num_ops);
- prev_op = &osd_req->r_ops[which];
- op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags);
- /* dup previous one */
- op->indata_len = prev_op->indata_len;
- op->outdata_len = prev_op->outdata_len;
- op->extent = prev_op->extent;
- /* adjust offset */
- op->extent.offset += offset_inc;
- op->extent.length -= offset_inc;
- if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL)
- op->indata_len -= offset_inc;
- }
- EXPORT_SYMBOL(osd_req_op_extent_dup_last);
- void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
- u16 opcode, const char *class, const char *method)
- {
- struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
- opcode, 0);
- struct ceph_pagelist *pagelist;
- size_t payload_len = 0;
- size_t size;
- BUG_ON(opcode != CEPH_OSD_OP_CALL);
- pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
- BUG_ON(!pagelist);
- ceph_pagelist_init(pagelist);
- op->cls.class_name = class;
- size = strlen(class);
- BUG_ON(size > (size_t) U8_MAX);
- op->cls.class_len = size;
- ceph_pagelist_append(pagelist, class, size);
- payload_len += size;
- op->cls.method_name = method;
- size = strlen(method);
- BUG_ON(size > (size_t) U8_MAX);
- op->cls.method_len = size;
- ceph_pagelist_append(pagelist, method, size);
- payload_len += size;
- osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
- op->indata_len = payload_len;
- }
- EXPORT_SYMBOL(osd_req_op_cls_init);
- int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
- u16 opcode, const char *name, const void *value,
- size_t size, u8 cmp_op, u8 cmp_mode)
- {
- struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which,
- opcode, 0);
- struct ceph_pagelist *pagelist;
- size_t payload_len;
- BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR);
- pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS);
- if (!pagelist)
- return -ENOMEM;
- ceph_pagelist_init(pagelist);
- payload_len = strlen(name);
- op->xattr.name_len = payload_len;
- ceph_pagelist_append(pagelist, name, payload_len);
- op->xattr.value_len = size;
- ceph_pagelist_append(pagelist, value, size);
- payload_len += size;
- op->xattr.cmp_op = cmp_op;
- op->xattr.cmp_mode = cmp_mode;
- ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist);
- op->indata_len = payload_len;
- return 0;
- }
- EXPORT_SYMBOL(osd_req_op_xattr_init);
- /*
- * @watch_opcode: CEPH_OSD_WATCH_OP_*
- */
- static void osd_req_op_watch_init(struct ceph_osd_request *req, int which,
- u64 cookie, u8 watch_opcode)
- {
- struct ceph_osd_req_op *op;
- op = _osd_req_op_init(req, which, CEPH_OSD_OP_WATCH, 0);
- op->watch.cookie = cookie;
- op->watch.op = watch_opcode;
- op->watch.gen = 0;
- }
- 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,
- 0);
- 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);
- static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
- 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)
- ceph_msg_data_add_pages(msg, osd_data->pages,
- length, osd_data->alignment);
- } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
- BUG_ON(!length);
- ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
- #ifdef CONFIG_BLOCK
- } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
- ceph_msg_data_add_bio(msg, osd_data->bio, length);
- #endif
- } else {
- BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
- }
- }
- static u32 osd_req_encode_op(struct ceph_osd_op *dst,
- const struct ceph_osd_req_op *src)
- {
- if (WARN_ON(!osd_req_opcode_valid(src->op))) {
- pr_err("unrecognized osd opcode %d\n", src->op);
- return 0;
- }
- switch (src->op) {
- case CEPH_OSD_OP_STAT:
- break;
- case CEPH_OSD_OP_READ:
- case CEPH_OSD_OP_WRITE:
- case CEPH_OSD_OP_WRITEFULL:
- case CEPH_OSD_OP_ZERO:
- case CEPH_OSD_OP_TRUNCATE:
- dst->extent.offset = cpu_to_le64(src->extent.offset);
- dst->extent.length = cpu_to_le64(src->extent.length);
- dst->extent.truncate_size =
- cpu_to_le64(src->extent.truncate_size);
- dst->extent.truncate_seq =
- cpu_to_le32(src->extent.truncate_seq);
- break;
- case CEPH_OSD_OP_CALL:
- dst->cls.class_len = src->cls.class_len;
- dst->cls.method_len = src->cls.method_len;
- dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
- break;
- case CEPH_OSD_OP_STARTSYNC:
- break;
- case CEPH_OSD_OP_WATCH:
- dst->watch.cookie = cpu_to_le64(src->watch.cookie);
- dst->watch.ver = cpu_to_le64(0);
- dst->watch.op = src->watch.op;
- dst->watch.gen = cpu_to_le32(src->watch.gen);
- break;
- case CEPH_OSD_OP_NOTIFY_ACK:
- break;
- case CEPH_OSD_OP_NOTIFY:
- dst->notify.cookie = cpu_to_le64(src->notify.cookie);
- break;
- case CEPH_OSD_OP_LIST_WATCHERS:
- break;
- 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;
- case CEPH_OSD_OP_SETXATTR:
- case CEPH_OSD_OP_CMPXATTR:
- dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
- dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
- dst->xattr.cmp_op = src->xattr.cmp_op;
- dst->xattr.cmp_mode = src->xattr.cmp_mode;
- break;
- case CEPH_OSD_OP_CREATE:
- case CEPH_OSD_OP_DELETE:
- break;
- default:
- pr_err("unsupported osd opcode %s\n",
- ceph_osd_op_name(src->op));
- WARN_ON(1);
- return 0;
- }
- dst->op = cpu_to_le16(src->op);
- dst->flags = cpu_to_le32(src->flags);
- dst->payload_len = cpu_to_le32(src->indata_len);
- return src->indata_len;
- }
- /*
- * 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,
- u64 off, u64 *plen,
- unsigned int which, int num_ops,
- int opcode, int flags,
- struct ceph_snap_context *snapc,
- u32 truncate_seq,
- u64 truncate_size,
- bool use_mempool)
- {
- struct ceph_osd_request *req;
- u64 objnum = 0;
- u64 objoff = 0;
- u64 objlen = 0;
- int r;
- BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
- opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
- opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
- req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
- GFP_NOFS);
- if (!req) {
- r = -ENOMEM;
- goto fail;
- }
- /* calculate max write size */
- r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
- if (r)
- goto fail;
- if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) {
- osd_req_op_init(req, which, opcode, 0);
- } else {
- u32 object_size = layout->object_size;
- u32 object_base = off - objoff;
- if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
- if (truncate_size <= object_base) {
- truncate_size = 0;
- } else {
- truncate_size -= object_base;
- if (truncate_size > object_size)
- truncate_size = object_size;
- }
- }
- osd_req_op_extent_init(req, which, opcode, objoff, objlen,
- truncate_size, truncate_seq);
- }
- req->r_flags = flags;
- req->r_base_oloc.pool = layout->pool_id;
- req->r_base_oloc.pool_ns = ceph_try_get_string(layout->pool_ns);
- ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum);
- req->r_snapid = vino.snap;
- if (flags & CEPH_OSD_FLAG_WRITE)
- req->r_data_offset = off;
- r = ceph_osdc_alloc_messages(req, GFP_NOFS);
- if (r)
- goto fail;
- return req;
- fail:
- ceph_osdc_put_request(req);
- return ERR_PTR(r);
- }
- EXPORT_SYMBOL(ceph_osdc_new_request);
- /*
- * We keep osd requests in an rbtree, sorted by ->r_tid.
- */
- DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
- DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
- static bool osd_homeless(struct ceph_osd *osd)
- {
- return osd->o_osd == CEPH_HOMELESS_OSD;
- }
- static bool osd_registered(struct ceph_osd *osd)
- {
- verify_osdc_locked(osd->o_osdc);
- return !RB_EMPTY_NODE(&osd->o_node);
- }
- /*
- * Assumes @osd is zero-initialized.
- */
- static void osd_init(struct ceph_osd *osd)
- {
- atomic_set(&osd->o_ref, 1);
- RB_CLEAR_NODE(&osd->o_node);
- osd->o_requests = RB_ROOT;
- osd->o_linger_requests = RB_ROOT;
- INIT_LIST_HEAD(&osd->o_osd_lru);
- INIT_LIST_HEAD(&osd->o_keepalive_item);
- osd->o_incarnation = 1;
- mutex_init(&osd->lock);
- }
- static void osd_cleanup(struct ceph_osd *osd)
- {
- WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
- WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
- WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
- WARN_ON(!list_empty(&osd->o_osd_lru));
- WARN_ON(!list_empty(&osd->o_keepalive_item));
- if (osd->o_auth.authorizer) {
- WARN_ON(osd_homeless(osd));
- ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
- }
- }
- /*
- * Track open sessions with osds.
- */
- static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
- {
- struct ceph_osd *osd;
- WARN_ON(onum == CEPH_HOMELESS_OSD);
- osd = kzalloc(sizeof(*osd), GFP_NOIO | __GFP_NOFAIL);
- osd_init(osd);
- osd->o_osdc = osdc;
- osd->o_osd = onum;
- ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
- 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);
- if (atomic_dec_and_test(&osd->o_ref)) {
- osd_cleanup(osd);
- kfree(osd);
- }
- }
- DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node)
- static void __move_osd_to_lru(struct ceph_osd *osd)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
- BUG_ON(!list_empty(&osd->o_osd_lru));
- spin_lock(&osdc->osd_lru_lock);
- list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
- spin_unlock(&osdc->osd_lru_lock);
- osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl;
- }
- static void maybe_move_osd_to_lru(struct ceph_osd *osd)
- {
- if (RB_EMPTY_ROOT(&osd->o_requests) &&
- RB_EMPTY_ROOT(&osd->o_linger_requests))
- __move_osd_to_lru(osd);
- }
- static void __remove_osd_from_lru(struct ceph_osd *osd)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
- spin_lock(&osdc->osd_lru_lock);
- if (!list_empty(&osd->o_osd_lru))
- list_del_init(&osd->o_osd_lru);
- spin_unlock(&osdc->osd_lru_lock);
- }
- /*
- * Close the connection and assign any leftover requests to the
- * homeless session.
- */
- static void close_osd(struct ceph_osd *osd)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- struct rb_node *n;
- verify_osdc_wrlocked(osdc);
- dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
- ceph_con_close(&osd->o_con);
- for (n = rb_first(&osd->o_requests); n; ) {
- struct ceph_osd_request *req =
- rb_entry(n, struct ceph_osd_request, r_node);
- n = rb_next(n); /* unlink_request() */
- dout(" reassigning req %p tid %llu\n", req, req->r_tid);
- unlink_request(osd, req);
- link_request(&osdc->homeless_osd, req);
- }
- for (n = rb_first(&osd->o_linger_requests); n; ) {
- struct ceph_osd_linger_request *lreq =
- rb_entry(n, struct ceph_osd_linger_request, node);
- n = rb_next(n); /* unlink_linger() */
- dout(" reassigning lreq %p linger_id %llu\n", lreq,
- lreq->linger_id);
- unlink_linger(osd, lreq);
- link_linger(&osdc->homeless_osd, lreq);
- }
- __remove_osd_from_lru(osd);
- erase_osd(&osdc->osds, osd);
- put_osd(osd);
- }
- /*
- * reset osd connect
- */
- static int reopen_osd(struct ceph_osd *osd)
- {
- struct ceph_entity_addr *peer_addr;
- dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
- if (RB_EMPTY_ROOT(&osd->o_requests) &&
- RB_EMPTY_ROOT(&osd->o_linger_requests)) {
- close_osd(osd);
- return -ENODEV;
- }
- peer_addr = &osd->o_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 rb_node *n;
- dout("osd addr hasn't changed and connection never opened, "
- "letting msgr retry\n");
- /* touch each r_stamp for handle_timeout()'s benfit */
- for (n = rb_first(&osd->o_requests); n; n = rb_next(n)) {
- struct ceph_osd_request *req =
- rb_entry(n, struct ceph_osd_request, r_node);
- req->r_stamp = jiffies;
- }
- return -EAGAIN;
- }
- 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;
- }
- static struct ceph_osd *lookup_create_osd(struct ceph_osd_client *osdc, int o,
- bool wrlocked)
- {
- struct ceph_osd *osd;
- if (wrlocked)
- verify_osdc_wrlocked(osdc);
- else
- verify_osdc_locked(osdc);
- if (o != CEPH_HOMELESS_OSD)
- osd = lookup_osd(&osdc->osds, o);
- else
- osd = &osdc->homeless_osd;
- if (!osd) {
- if (!wrlocked)
- return ERR_PTR(-EAGAIN);
- osd = create_osd(osdc, o);
- insert_osd(&osdc->osds, osd);
- ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
- &osdc->osdmap->osd_addr[osd->o_osd]);
- }
- dout("%s osdc %p osd%d -> osd %p\n", __func__, osdc, o, osd);
- return osd;
- }
- /*
- * Create request <-> OSD session relation.
- *
- * @req has to be assigned a tid, @osd may be homeless.
- */
- static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
- {
- verify_osd_locked(osd);
- WARN_ON(!req->r_tid || req->r_osd);
- dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
- req, req->r_tid);
- if (!osd_homeless(osd))
- __remove_osd_from_lru(osd);
- else
- atomic_inc(&osd->o_osdc->num_homeless);
- get_osd(osd);
- insert_request(&osd->o_requests, req);
- req->r_osd = osd;
- }
- static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
- {
- verify_osd_locked(osd);
- WARN_ON(req->r_osd != osd);
- dout("%s osd %p osd%d req %p tid %llu\n", __func__, osd, osd->o_osd,
- req, req->r_tid);
- req->r_osd = NULL;
- erase_request(&osd->o_requests, req);
- put_osd(osd);
- if (!osd_homeless(osd))
- maybe_move_osd_to_lru(osd);
- else
- atomic_dec(&osd->o_osdc->num_homeless);
- }
- static bool __pool_full(struct ceph_pg_pool_info *pi)
- {
- return pi->flags & CEPH_POOL_FLAG_FULL;
- }
- static bool have_pool_full(struct ceph_osd_client *osdc)
- {
- struct rb_node *n;
- for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
- struct ceph_pg_pool_info *pi =
- rb_entry(n, struct ceph_pg_pool_info, node);
- if (__pool_full(pi))
- return true;
- }
- return false;
- }
- static bool pool_full(struct ceph_osd_client *osdc, s64 pool_id)
- {
- struct ceph_pg_pool_info *pi;
- pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
- if (!pi)
- return false;
- return __pool_full(pi);
- }
- /*
- * Returns whether a request should be blocked from being sent
- * based on the current osdmap and osd_client settings.
- */
- static bool target_should_be_paused(struct ceph_osd_client *osdc,
- const struct ceph_osd_request_target *t,
- struct ceph_pg_pool_info *pi)
- {
- bool pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
- bool pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
- __pool_full(pi);
- WARN_ON(pi->id != t->base_oloc.pool);
- return (t->flags & CEPH_OSD_FLAG_READ && pauserd) ||
- (t->flags & CEPH_OSD_FLAG_WRITE && pausewr);
- }
- enum calc_target_result {
- CALC_TARGET_NO_ACTION = 0,
- CALC_TARGET_NEED_RESEND,
- CALC_TARGET_POOL_DNE,
- };
- static enum calc_target_result calc_target(struct ceph_osd_client *osdc,
- struct ceph_osd_request_target *t,
- u32 *last_force_resend,
- bool any_change)
- {
- struct ceph_pg_pool_info *pi;
- struct ceph_pg pgid, last_pgid;
- struct ceph_osds up, acting;
- bool force_resend = false;
- bool need_check_tiering = false;
- bool need_resend = false;
- bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE);
- enum calc_target_result ct_res;
- int ret;
- pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool);
- if (!pi) {
- t->osd = CEPH_HOMELESS_OSD;
- ct_res = CALC_TARGET_POOL_DNE;
- goto out;
- }
- if (osdc->osdmap->epoch == pi->last_force_request_resend) {
- if (last_force_resend &&
- *last_force_resend < pi->last_force_request_resend) {
- *last_force_resend = pi->last_force_request_resend;
- force_resend = true;
- } else if (!last_force_resend) {
- force_resend = true;
- }
- }
- if (ceph_oid_empty(&t->target_oid) || force_resend) {
- ceph_oid_copy(&t->target_oid, &t->base_oid);
- need_check_tiering = true;
- }
- if (ceph_oloc_empty(&t->target_oloc) || force_resend) {
- ceph_oloc_copy(&t->target_oloc, &t->base_oloc);
- need_check_tiering = true;
- }
- if (need_check_tiering &&
- (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
- if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0)
- t->target_oloc.pool = pi->read_tier;
- if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0)
- t->target_oloc.pool = pi->write_tier;
- }
- ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid,
- &t->target_oloc, &pgid);
- if (ret) {
- WARN_ON(ret != -ENOENT);
- t->osd = CEPH_HOMELESS_OSD;
- ct_res = CALC_TARGET_POOL_DNE;
- goto out;
- }
- last_pgid.pool = pgid.pool;
- last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask);
- ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting);
- if (any_change &&
- ceph_is_new_interval(&t->acting,
- &acting,
- &t->up,
- &up,
- t->size,
- pi->size,
- t->min_size,
- pi->min_size,
- t->pg_num,
- pi->pg_num,
- t->sort_bitwise,
- sort_bitwise,
- &last_pgid))
- force_resend = true;
- if (t->paused && !target_should_be_paused(osdc, t, pi)) {
- t->paused = false;
- need_resend = true;
- }
- if (ceph_pg_compare(&t->pgid, &pgid) ||
- ceph_osds_changed(&t->acting, &acting, any_change) ||
- force_resend) {
- t->pgid = pgid; /* struct */
- ceph_osds_copy(&t->acting, &acting);
- ceph_osds_copy(&t->up, &up);
- t->size = pi->size;
- t->min_size = pi->min_size;
- t->pg_num = pi->pg_num;
- t->pg_num_mask = pi->pg_num_mask;
- t->sort_bitwise = sort_bitwise;
- t->osd = acting.primary;
- need_resend = true;
- }
- ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION;
- out:
- dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd);
- return ct_res;
- }
- static void setup_request_data(struct ceph_osd_request *req,
- struct ceph_msg *msg)
- {
- u32 data_len = 0;
- int i;
- if (!list_empty(&msg->data))
- return;
- WARN_ON(msg->data_length);
- for (i = 0; i < req->r_num_ops; i++) {
- struct ceph_osd_req_op *op = &req->r_ops[i];
- switch (op->op) {
- /* request */
- case CEPH_OSD_OP_WRITE:
- case CEPH_OSD_OP_WRITEFULL:
- WARN_ON(op->indata_len != op->extent.length);
- ceph_osdc_msg_data_add(msg, &op->extent.osd_data);
- break;
- case CEPH_OSD_OP_SETXATTR:
- case CEPH_OSD_OP_CMPXATTR:
- WARN_ON(op->indata_len != op->xattr.name_len +
- op->xattr.value_len);
- ceph_osdc_msg_data_add(msg, &op->xattr.osd_data);
- break;
- case CEPH_OSD_OP_NOTIFY_ACK:
- ceph_osdc_msg_data_add(msg,
- &op->notify_ack.request_data);
- break;
- /* reply */
- case CEPH_OSD_OP_STAT:
- ceph_osdc_msg_data_add(req->r_reply,
- &op->raw_data_in);
- break;
- case CEPH_OSD_OP_READ:
- ceph_osdc_msg_data_add(req->r_reply,
- &op->extent.osd_data);
- break;
- case CEPH_OSD_OP_LIST_WATCHERS:
- ceph_osdc_msg_data_add(req->r_reply,
- &op->list_watchers.response_data);
- break;
- /* both */
- case CEPH_OSD_OP_CALL:
- WARN_ON(op->indata_len != op->cls.class_len +
- op->cls.method_len +
- op->cls.indata_len);
- ceph_osdc_msg_data_add(msg, &op->cls.request_info);
- /* optional, can be NONE */
- ceph_osdc_msg_data_add(msg, &op->cls.request_data);
- /* optional, can be NONE */
- ceph_osdc_msg_data_add(req->r_reply,
- &op->cls.response_data);
- break;
- case CEPH_OSD_OP_NOTIFY:
- ceph_osdc_msg_data_add(msg,
- &op->notify.request_data);
- ceph_osdc_msg_data_add(req->r_reply,
- &op->notify.response_data);
- break;
- }
- data_len += op->indata_len;
- }
- WARN_ON(data_len != msg->data_length);
- }
- static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg)
- {
- void *p = msg->front.iov_base;
- void *const end = p + msg->front_alloc_len;
- u32 data_len = 0;
- int i;
- if (req->r_flags & CEPH_OSD_FLAG_WRITE) {
- /* snapshots aren't writeable */
- WARN_ON(req->r_snapid != CEPH_NOSNAP);
- } else {
- WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec ||
- req->r_data_offset || req->r_snapc);
- }
- setup_request_data(req, msg);
- ceph_encode_32(&p, 1); /* client_inc, always 1 */
- ceph_encode_32(&p, req->r_osdc->osdmap->epoch);
- ceph_encode_32(&p, req->r_flags);
- ceph_encode_timespec(p, &req->r_mtime);
- p += sizeof(struct ceph_timespec);
- /* aka reassert_version */
- memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version));
- p += sizeof(req->r_replay_version);
- /* oloc */
- ceph_start_encoding(&p, 5, 4,
- ceph_oloc_encoding_size(&req->r_t.target_oloc));
- ceph_encode_64(&p, req->r_t.target_oloc.pool);
- ceph_encode_32(&p, -1); /* preferred */
- ceph_encode_32(&p, 0); /* key len */
- if (req->r_t.target_oloc.pool_ns)
- ceph_encode_string(&p, end, req->r_t.target_oloc.pool_ns->str,
- req->r_t.target_oloc.pool_ns->len);
- else
- ceph_encode_32(&p, 0);
- /* pgid */
- ceph_encode_8(&p, 1);
- ceph_encode_64(&p, req->r_t.pgid.pool);
- ceph_encode_32(&p, req->r_t.pgid.seed);
- ceph_encode_32(&p, -1); /* preferred */
- /* oid */
- ceph_encode_32(&p, req->r_t.target_oid.name_len);
- memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len);
- p += req->r_t.target_oid.name_len;
- /* ops, can imply data */
- ceph_encode_16(&p, req->r_num_ops);
- for (i = 0; i < req->r_num_ops; i++) {
- data_len += osd_req_encode_op(p, &req->r_ops[i]);
- p += sizeof(struct ceph_osd_op);
- }
- ceph_encode_64(&p, req->r_snapid); /* snapid */
- if (req->r_snapc) {
- ceph_encode_64(&p, req->r_snapc->seq);
- ceph_encode_32(&p, req->r_snapc->num_snaps);
- for (i = 0; i < req->r_snapc->num_snaps; i++)
- ceph_encode_64(&p, req->r_snapc->snaps[i]);
- } else {
- ceph_encode_64(&p, 0); /* snap_seq */
- ceph_encode_32(&p, 0); /* snaps len */
- }
- ceph_encode_32(&p, req->r_attempts); /* retry_attempt */
- BUG_ON(p > end);
- msg->front.iov_len = p - msg->front.iov_base;
- msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */
- msg->hdr.front_len = cpu_to_le32(msg->front.iov_len);
- msg->hdr.data_len = cpu_to_le32(data_len);
- /*
- * The header "data_off" is a hint to the receiver allowing it
- * to align received data into its buffers such that there's no
- * need to re-copy it before writing it to disk (direct I/O).
- */
- msg->hdr.data_off = cpu_to_le16(req->r_data_offset);
- dout("%s req %p oid %s oid_len %d front %zu data %u\n", __func__,
- req, req->r_t.target_oid.name, req->r_t.target_oid.name_len,
- msg->front.iov_len, data_len);
- }
- /*
- * @req has to be assigned a tid and registered.
- */
- static void send_request(struct ceph_osd_request *req)
- {
- struct ceph_osd *osd = req->r_osd;
- verify_osd_locked(osd);
- WARN_ON(osd->o_osd != req->r_t.osd);
- /*
- * We may have a previously queued request message hanging
- * around. Cancel it to avoid corrupting the msgr.
- */
- if (req->r_sent)
- ceph_msg_revoke(req->r_request);
- req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR;
- if (req->r_attempts)
- req->r_flags |= CEPH_OSD_FLAG_RETRY;
- else
- WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY);
- encode_request(req, req->r_request);
- dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n",
- __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed,
- req->r_t.osd, req->r_flags, req->r_attempts);
- req->r_t.paused = false;
- req->r_stamp = jiffies;
- req->r_attempts++;
- req->r_sent = osd->o_incarnation;
- req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
- ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request));
- }
- static void maybe_request_map(struct ceph_osd_client *osdc)
- {
- bool continuous = false;
- verify_osdc_locked(osdc);
- WARN_ON(!osdc->osdmap->epoch);
- if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD) ||
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
- dout("%s osdc %p continuous\n", __func__, osdc);
- continuous = true;
- } else {
- dout("%s osdc %p onetime\n", __func__, osdc);
- }
- if (ceph_monc_want_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
- osdc->osdmap->epoch + 1, continuous))
- ceph_monc_renew_subs(&osdc->client->monc);
- }
- static void send_map_check(struct ceph_osd_request *req);
- static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_osd *osd;
- enum calc_target_result ct_res;
- bool need_send = false;
- bool promoted = false;
- WARN_ON(req->r_tid || req->r_got_reply);
- dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
- again:
- ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
- if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
- goto promote;
- osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
- if (IS_ERR(osd)) {
- WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
- goto promote;
- }
- if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR)) {
- dout("req %p pausewr\n", req);
- req->r_t.paused = true;
- maybe_request_map(osdc);
- } else if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
- dout("req %p pauserd\n", req);
- req->r_t.paused = true;
- maybe_request_map(osdc);
- } else if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
- !(req->r_flags & (CEPH_OSD_FLAG_FULL_TRY |
- CEPH_OSD_FLAG_FULL_FORCE)) &&
- (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
- pool_full(osdc, req->r_t.base_oloc.pool))) {
- dout("req %p full/pool_full\n", req);
- pr_warn_ratelimited("FULL or reached pool quota\n");
- req->r_t.paused = true;
- maybe_request_map(osdc);
- } else if (!osd_homeless(osd)) {
- need_send = true;
- } else {
- maybe_request_map(osdc);
- }
- mutex_lock(&osd->lock);
- /*
- * Assign the tid atomically with send_request() to protect
- * multiple writes to the same object from racing with each
- * other, resulting in out of order ops on the OSDs.
- */
- req->r_tid = atomic64_inc_return(&osdc->last_tid);
- link_request(osd, req);
- if (need_send)
- send_request(req);
- mutex_unlock(&osd->lock);
- if (ct_res == CALC_TARGET_POOL_DNE)
- send_map_check(req);
- if (promoted)
- downgrade_write(&osdc->lock);
- return;
- promote:
- up_read(&osdc->lock);
- down_write(&osdc->lock);
- wrlocked = true;
- promoted = true;
- goto again;
- }
- static void account_request(struct ceph_osd_request *req)
- {
- unsigned int mask = CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK;
- if (req->r_flags & CEPH_OSD_FLAG_READ) {
- WARN_ON(req->r_flags & mask);
- req->r_flags |= CEPH_OSD_FLAG_ACK;
- } else if (req->r_flags & CEPH_OSD_FLAG_WRITE)
- WARN_ON(!(req->r_flags & mask));
- else
- WARN_ON(1);
- WARN_ON(req->r_unsafe_callback && (req->r_flags & mask) != mask);
- atomic_inc(&req->r_osdc->num_requests);
- }
- static void submit_request(struct ceph_osd_request *req, bool wrlocked)
- {
- ceph_osdc_get_request(req);
- account_request(req);
- __submit_request(req, wrlocked);
- }
- static void __finish_request(struct ceph_osd_request *req)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_osd *osd = req->r_osd;
- verify_osd_locked(osd);
- dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
- WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
- unlink_request(osd, req);
- atomic_dec(&osdc->num_requests);
- /*
- * If an OSD has failed or returned and a request has been sent
- * twice, it's possible to get a reply and end up here while the
- * request message is queued for delivery. We will ignore the
- * reply, so not a big deal, but better to try and catch it.
- */
- ceph_msg_revoke(req->r_request);
- ceph_msg_revoke_incoming(req->r_reply);
- }
- static void finish_request(struct ceph_osd_request *req)
- {
- __finish_request(req);
- ceph_osdc_put_request(req);
- }
- static void __complete_request(struct ceph_osd_request *req)
- {
- if (req->r_callback)
- req->r_callback(req);
- else
- complete_all(&req->r_completion);
- }
- /*
- * Note that this is open-coded in handle_reply(), which has to deal
- * with ack vs commit, dup acks, etc.
- */
- static void complete_request(struct ceph_osd_request *req, int err)
- {
- dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
- req->r_result = err;
- __finish_request(req);
- __complete_request(req);
- complete_all(&req->r_safe_completion);
- ceph_osdc_put_request(req);
- }
- static void cancel_map_check(struct ceph_osd_request *req)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_osd_request *lookup_req;
- verify_osdc_wrlocked(osdc);
- lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
- if (!lookup_req)
- return;
- WARN_ON(lookup_req != req);
- erase_request_mc(&osdc->map_checks, req);
- ceph_osdc_put_request(req);
- }
- static void cancel_request(struct ceph_osd_request *req)
- {
- dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
- cancel_map_check(req);
- finish_request(req);
- }
- static void check_pool_dne(struct ceph_osd_request *req)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_osdmap *map = osdc->osdmap;
- verify_osdc_wrlocked(osdc);
- WARN_ON(!map->epoch);
- if (req->r_attempts) {
- /*
- * We sent a request earlier, which means that
- * previously the pool existed, and now it does not
- * (i.e., it was deleted).
- */
- req->r_map_dne_bound = map->epoch;
- dout("%s req %p tid %llu pool disappeared\n", __func__, req,
- req->r_tid);
- } else {
- dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
- req, req->r_tid, req->r_map_dne_bound, map->epoch);
- }
- if (req->r_map_dne_bound) {
- if (map->epoch >= req->r_map_dne_bound) {
- /* we had a new enough map */
- pr_info_ratelimited("tid %llu pool does not exist\n",
- req->r_tid);
- complete_request(req, -ENOENT);
- }
- } else {
- send_map_check(req);
- }
- }
- static void map_check_cb(struct ceph_mon_generic_request *greq)
- {
- struct ceph_osd_client *osdc = &greq->monc->client->osdc;
- struct ceph_osd_request *req;
- u64 tid = greq->private_data;
- WARN_ON(greq->result || !greq->u.newest);
- down_write(&osdc->lock);
- req = lookup_request_mc(&osdc->map_checks, tid);
- if (!req) {
- dout("%s tid %llu dne\n", __func__, tid);
- goto out_unlock;
- }
- dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
- req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
- if (!req->r_map_dne_bound)
- req->r_map_dne_bound = greq->u.newest;
- erase_request_mc(&osdc->map_checks, req);
- check_pool_dne(req);
- ceph_osdc_put_request(req);
- out_unlock:
- up_write(&osdc->lock);
- }
- static void send_map_check(struct ceph_osd_request *req)
- {
- struct ceph_osd_client *osdc = req->r_osdc;
- struct ceph_osd_request *lookup_req;
- int ret;
- verify_osdc_wrlocked(osdc);
- lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
- if (lookup_req) {
- WARN_ON(lookup_req != req);
- return;
- }
- ceph_osdc_get_request(req);
- insert_request_mc(&osdc->map_checks, req);
- ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
- map_check_cb, req->r_tid);
- WARN_ON(ret);
- }
- /*
- * lingering requests, watch/notify v2 infrastructure
- */
- static void linger_release(struct kref *kref)
- {
- struct ceph_osd_linger_request *lreq =
- container_of(kref, struct ceph_osd_linger_request, kref);
- dout("%s lreq %p reg_req %p ping_req %p\n", __func__, lreq,
- lreq->reg_req, lreq->ping_req);
- WARN_ON(!RB_EMPTY_NODE(&lreq->node));
- WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
- WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
- WARN_ON(!list_empty(&lreq->scan_item));
- WARN_ON(!list_empty(&lreq->pending_lworks));
- WARN_ON(lreq->osd);
- if (lreq->reg_req)
- ceph_osdc_put_request(lreq->reg_req);
- if (lreq->ping_req)
- ceph_osdc_put_request(lreq->ping_req);
- target_destroy(&lreq->t);
- kfree(lreq);
- }
- static void linger_put(struct ceph_osd_linger_request *lreq)
- {
- if (lreq)
- kref_put(&lreq->kref, linger_release);
- }
- static struct ceph_osd_linger_request *
- linger_get(struct ceph_osd_linger_request *lreq)
- {
- kref_get(&lreq->kref);
- return lreq;
- }
- static struct ceph_osd_linger_request *
- linger_alloc(struct ceph_osd_client *osdc)
- {
- struct ceph_osd_linger_request *lreq;
- lreq = kzalloc(sizeof(*lreq), GFP_NOIO);
- if (!lreq)
- return NULL;
- kref_init(&lreq->kref);
- mutex_init(&lreq->lock);
- RB_CLEAR_NODE(&lreq->node);
- RB_CLEAR_NODE(&lreq->osdc_node);
- RB_CLEAR_NODE(&lreq->mc_node);
- INIT_LIST_HEAD(&lreq->scan_item);
- INIT_LIST_HEAD(&lreq->pending_lworks);
- init_completion(&lreq->reg_commit_wait);
- init_completion(&lreq->notify_finish_wait);
- lreq->osdc = osdc;
- target_init(&lreq->t);
- dout("%s lreq %p\n", __func__, lreq);
- return lreq;
- }
- DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
- DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
- DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
- /*
- * Create linger request <-> OSD session relation.
- *
- * @lreq has to be registered, @osd may be homeless.
- */
- static void link_linger(struct ceph_osd *osd,
- struct ceph_osd_linger_request *lreq)
- {
- verify_osd_locked(osd);
- WARN_ON(!lreq->linger_id || lreq->osd);
- dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
- osd->o_osd, lreq, lreq->linger_id);
- if (!osd_homeless(osd))
- __remove_osd_from_lru(osd);
- else
- atomic_inc(&osd->o_osdc->num_homeless);
- get_osd(osd);
- insert_linger(&osd->o_linger_requests, lreq);
- lreq->osd = osd;
- }
- static void unlink_linger(struct ceph_osd *osd,
- struct ceph_osd_linger_request *lreq)
- {
- verify_osd_locked(osd);
- WARN_ON(lreq->osd != osd);
- dout("%s osd %p osd%d lreq %p linger_id %llu\n", __func__, osd,
- osd->o_osd, lreq, lreq->linger_id);
- lreq->osd = NULL;
- erase_linger(&osd->o_linger_requests, lreq);
- put_osd(osd);
- if (!osd_homeless(osd))
- maybe_move_osd_to_lru(osd);
- else
- atomic_dec(&osd->o_osdc->num_homeless);
- }
- static bool __linger_registered(struct ceph_osd_linger_request *lreq)
- {
- verify_osdc_locked(lreq->osdc);
- return !RB_EMPTY_NODE(&lreq->osdc_node);
- }
- static bool linger_registered(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- bool registered;
- down_read(&osdc->lock);
- registered = __linger_registered(lreq);
- up_read(&osdc->lock);
- return registered;
- }
- static void linger_register(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- verify_osdc_wrlocked(osdc);
- WARN_ON(lreq->linger_id);
- linger_get(lreq);
- lreq->linger_id = ++osdc->last_linger_id;
- insert_linger_osdc(&osdc->linger_requests, lreq);
- }
- static void linger_unregister(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- verify_osdc_wrlocked(osdc);
- erase_linger_osdc(&osdc->linger_requests, lreq);
- linger_put(lreq);
- }
- static void cancel_linger_request(struct ceph_osd_request *req)
- {
- struct ceph_osd_linger_request *lreq = req->r_priv;
- WARN_ON(!req->r_linger);
- cancel_request(req);
- linger_put(lreq);
- }
- struct linger_work {
- struct work_struct work;
- struct ceph_osd_linger_request *lreq;
- struct list_head pending_item;
- unsigned long queued_stamp;
- union {
- struct {
- u64 notify_id;
- u64 notifier_id;
- void *payload; /* points into @msg front */
- size_t payload_len;
- struct ceph_msg *msg; /* for ceph_msg_put() */
- } notify;
- struct {
- int err;
- } error;
- };
- };
- static struct linger_work *lwork_alloc(struct ceph_osd_linger_request *lreq,
- work_func_t workfn)
- {
- struct linger_work *lwork;
- lwork = kzalloc(sizeof(*lwork), GFP_NOIO);
- if (!lwork)
- return NULL;
- INIT_WORK(&lwork->work, workfn);
- INIT_LIST_HEAD(&lwork->pending_item);
- lwork->lreq = linger_get(lreq);
- return lwork;
- }
- static void lwork_free(struct linger_work *lwork)
- {
- struct ceph_osd_linger_request *lreq = lwork->lreq;
- mutex_lock(&lreq->lock);
- list_del(&lwork->pending_item);
- mutex_unlock(&lreq->lock);
- linger_put(lreq);
- kfree(lwork);
- }
- static void lwork_queue(struct linger_work *lwork)
- {
- struct ceph_osd_linger_request *lreq = lwork->lreq;
- struct ceph_osd_client *osdc = lreq->osdc;
- verify_lreq_locked(lreq);
- WARN_ON(!list_empty(&lwork->pending_item));
- lwork->queued_stamp = jiffies;
- list_add_tail(&lwork->pending_item, &lreq->pending_lworks);
- queue_work(osdc->notify_wq, &lwork->work);
- }
- static void do_watch_notify(struct work_struct *w)
- {
- struct linger_work *lwork = container_of(w, struct linger_work, work);
- struct ceph_osd_linger_request *lreq = lwork->lreq;
- if (!linger_registered(lreq)) {
- dout("%s lreq %p not registered\n", __func__, lreq);
- goto out;
- }
- WARN_ON(!lreq->is_watch);
- dout("%s lreq %p notify_id %llu notifier_id %llu payload_len %zu\n",
- __func__, lreq, lwork->notify.notify_id, lwork->notify.notifier_id,
- lwork->notify.payload_len);
- lreq->wcb(lreq->data, lwork->notify.notify_id, lreq->linger_id,
- lwork->notify.notifier_id, lwork->notify.payload,
- lwork->notify.payload_len);
- out:
- ceph_msg_put(lwork->notify.msg);
- lwork_free(lwork);
- }
- static void do_watch_error(struct work_struct *w)
- {
- struct linger_work *lwork = container_of(w, struct linger_work, work);
- struct ceph_osd_linger_request *lreq = lwork->lreq;
- if (!linger_registered(lreq)) {
- dout("%s lreq %p not registered\n", __func__, lreq);
- goto out;
- }
- dout("%s lreq %p err %d\n", __func__, lreq, lwork->error.err);
- lreq->errcb(lreq->data, lreq->linger_id, lwork->error.err);
- out:
- lwork_free(lwork);
- }
- static void queue_watch_error(struct ceph_osd_linger_request *lreq)
- {
- struct linger_work *lwork;
- lwork = lwork_alloc(lreq, do_watch_error);
- if (!lwork) {
- pr_err("failed to allocate error-lwork\n");
- return;
- }
- lwork->error.err = lreq->last_error;
- lwork_queue(lwork);
- }
- static void linger_reg_commit_complete(struct ceph_osd_linger_request *lreq,
- int result)
- {
- if (!completion_done(&lreq->reg_commit_wait)) {
- lreq->reg_commit_error = (result <= 0 ? result : 0);
- complete_all(&lreq->reg_commit_wait);
- }
- }
- static void linger_commit_cb(struct ceph_osd_request *req)
- {
- struct ceph_osd_linger_request *lreq = req->r_priv;
- mutex_lock(&lreq->lock);
- dout("%s lreq %p linger_id %llu result %d\n", __func__, lreq,
- lreq->linger_id, req->r_result);
- WARN_ON(!__linger_registered(lreq));
- linger_reg_commit_complete(lreq, req->r_result);
- lreq->committed = true;
- if (!lreq->is_watch) {
- struct ceph_osd_data *osd_data =
- osd_req_op_data(req, 0, notify, response_data);
- void *p = page_address(osd_data->pages[0]);
- WARN_ON(req->r_ops[0].op != CEPH_OSD_OP_NOTIFY ||
- osd_data->type != CEPH_OSD_DATA_TYPE_PAGES);
- /* make note of the notify_id */
- if (req->r_ops[0].outdata_len >= sizeof(u64)) {
- lreq->notify_id = ceph_decode_64(&p);
- dout("lreq %p notify_id %llu\n", lreq,
- lreq->notify_id);
- } else {
- dout("lreq %p no notify_id\n", lreq);
- }
- }
- mutex_unlock(&lreq->lock);
- linger_put(lreq);
- }
- static int normalize_watch_error(int err)
- {
- /*
- * Translate ENOENT -> ENOTCONN so that a delete->disconnection
- * notification and a failure to reconnect because we raced with
- * the delete appear the same to the user.
- */
- if (err == -ENOENT)
- err = -ENOTCONN;
- return err;
- }
- static void linger_reconnect_cb(struct ceph_osd_request *req)
- {
- struct ceph_osd_linger_request *lreq = req->r_priv;
- mutex_lock(&lreq->lock);
- dout("%s lreq %p linger_id %llu result %d last_error %d\n", __func__,
- lreq, lreq->linger_id, req->r_result, lreq->last_error);
- if (req->r_result < 0) {
- if (!lreq->last_error) {
- lreq->last_error = normalize_watch_error(req->r_result);
- queue_watch_error(lreq);
- }
- }
- mutex_unlock(&lreq->lock);
- linger_put(lreq);
- }
- static void send_linger(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_request *req = lreq->reg_req;
- struct ceph_osd_req_op *op = &req->r_ops[0];
- verify_osdc_wrlocked(req->r_osdc);
- dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
- if (req->r_osd)
- cancel_linger_request(req);
- request_reinit(req);
- ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
- ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
- req->r_flags = lreq->t.flags;
- req->r_mtime = lreq->mtime;
- mutex_lock(&lreq->lock);
- if (lreq->is_watch && lreq->committed) {
- WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
- op->watch.cookie != lreq->linger_id);
- op->watch.op = CEPH_OSD_WATCH_OP_RECONNECT;
- op->watch.gen = ++lreq->register_gen;
- dout("lreq %p reconnect register_gen %u\n", lreq,
- op->watch.gen);
- req->r_callback = linger_reconnect_cb;
- } else {
- if (!lreq->is_watch)
- lreq->notify_id = 0;
- else
- WARN_ON(op->watch.op != CEPH_OSD_WATCH_OP_WATCH);
- dout("lreq %p register\n", lreq);
- req->r_callback = linger_commit_cb;
- }
- mutex_unlock(&lreq->lock);
- req->r_priv = linger_get(lreq);
- req->r_linger = true;
- submit_request(req, true);
- }
- static void linger_ping_cb(struct ceph_osd_request *req)
- {
- struct ceph_osd_linger_request *lreq = req->r_priv;
- mutex_lock(&lreq->lock);
- dout("%s lreq %p linger_id %llu result %d ping_sent %lu last_error %d\n",
- __func__, lreq, lreq->linger_id, req->r_result, lreq->ping_sent,
- lreq->last_error);
- if (lreq->register_gen == req->r_ops[0].watch.gen) {
- if (!req->r_result) {
- lreq->watch_valid_thru = lreq->ping_sent;
- } else if (!lreq->last_error) {
- lreq->last_error = normalize_watch_error(req->r_result);
- queue_watch_error(lreq);
- }
- } else {
- dout("lreq %p register_gen %u ignoring old pong %u\n", lreq,
- lreq->register_gen, req->r_ops[0].watch.gen);
- }
- mutex_unlock(&lreq->lock);
- linger_put(lreq);
- }
- static void send_linger_ping(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- struct ceph_osd_request *req = lreq->ping_req;
- struct ceph_osd_req_op *op = &req->r_ops[0];
- if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD)) {
- dout("%s PAUSERD\n", __func__);
- return;
- }
- lreq->ping_sent = jiffies;
- dout("%s lreq %p linger_id %llu ping_sent %lu register_gen %u\n",
- __func__, lreq, lreq->linger_id, lreq->ping_sent,
- lreq->register_gen);
- if (req->r_osd)
- cancel_linger_request(req);
- request_reinit(req);
- target_copy(&req->r_t, &lreq->t);
- WARN_ON(op->op != CEPH_OSD_OP_WATCH ||
- op->watch.cookie != lreq->linger_id ||
- op->watch.op != CEPH_OSD_WATCH_OP_PING);
- op->watch.gen = lreq->register_gen;
- req->r_callback = linger_ping_cb;
- req->r_priv = linger_get(lreq);
- req->r_linger = true;
- ceph_osdc_get_request(req);
- account_request(req);
- req->r_tid = atomic64_inc_return(&osdc->last_tid);
- link_request(lreq->osd, req);
- send_request(req);
- }
- static void linger_submit(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- struct ceph_osd *osd;
- calc_target(osdc, &lreq->t, &lreq->last_force_resend, false);
- osd = lookup_create_osd(osdc, lreq->t.osd, true);
- link_linger(osd, lreq);
- send_linger(lreq);
- }
- static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- struct ceph_osd_linger_request *lookup_lreq;
- verify_osdc_wrlocked(osdc);
- lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
- lreq->linger_id);
- if (!lookup_lreq)
- return;
- WARN_ON(lookup_lreq != lreq);
- erase_linger_mc(&osdc->linger_map_checks, lreq);
- linger_put(lreq);
- }
- /*
- * @lreq has to be both registered and linked.
- */
- static void __linger_cancel(struct ceph_osd_linger_request *lreq)
- {
- if (lreq->is_watch && lreq->ping_req->r_osd)
- cancel_linger_request(lreq->ping_req);
- if (lreq->reg_req->r_osd)
- cancel_linger_request(lreq->reg_req);
- cancel_linger_map_check(lreq);
- unlink_linger(lreq->osd, lreq);
- linger_unregister(lreq);
- }
- static void linger_cancel(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- down_write(&osdc->lock);
- if (__linger_registered(lreq))
- __linger_cancel(lreq);
- up_write(&osdc->lock);
- }
- static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
- static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- struct ceph_osdmap *map = osdc->osdmap;
- verify_osdc_wrlocked(osdc);
- WARN_ON(!map->epoch);
- if (lreq->register_gen) {
- lreq->map_dne_bound = map->epoch;
- dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
- lreq, lreq->linger_id);
- } else {
- dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
- __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
- map->epoch);
- }
- if (lreq->map_dne_bound) {
- if (map->epoch >= lreq->map_dne_bound) {
- /* we had a new enough map */
- pr_info("linger_id %llu pool does not exist\n",
- lreq->linger_id);
- linger_reg_commit_complete(lreq, -ENOENT);
- __linger_cancel(lreq);
- }
- } else {
- send_linger_map_check(lreq);
- }
- }
- static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
- {
- struct ceph_osd_client *osdc = &greq->monc->client->osdc;
- struct ceph_osd_linger_request *lreq;
- u64 linger_id = greq->private_data;
- WARN_ON(greq->result || !greq->u.newest);
- down_write(&osdc->lock);
- lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
- if (!lreq) {
- dout("%s linger_id %llu dne\n", __func__, linger_id);
- goto out_unlock;
- }
- dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
- __func__, lreq, lreq->linger_id, lreq->map_dne_bound,
- greq->u.newest);
- if (!lreq->map_dne_bound)
- lreq->map_dne_bound = greq->u.newest;
- erase_linger_mc(&osdc->linger_map_checks, lreq);
- check_linger_pool_dne(lreq);
- linger_put(lreq);
- out_unlock:
- up_write(&osdc->lock);
- }
- static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- struct ceph_osd_linger_request *lookup_lreq;
- int ret;
- verify_osdc_wrlocked(osdc);
- lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
- lreq->linger_id);
- if (lookup_lreq) {
- WARN_ON(lookup_lreq != lreq);
- return;
- }
- linger_get(lreq);
- insert_linger_mc(&osdc->linger_map_checks, lreq);
- ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
- linger_map_check_cb, lreq->linger_id);
- WARN_ON(ret);
- }
- static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
- {
- int ret;
- dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
- ret = wait_for_completion_interruptible(&lreq->reg_commit_wait);
- return ret ?: lreq->reg_commit_error;
- }
- static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq)
- {
- int ret;
- dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id);
- ret = wait_for_completion_interruptible(&lreq->notify_finish_wait);
- return ret ?: lreq->notify_finish_error;
- }
- /*
- * Timeout callback, called every N seconds. When 1 or more OSD
- * requests has been active for more than N seconds, we send a keepalive
- * (tag + timestamp) to its OSD to ensure any communications channel
- * reset is detected.
- */
- static void handle_timeout(struct work_struct *work)
- {
- struct ceph_osd_client *osdc =
- container_of(work, struct ceph_osd_client, timeout_work.work);
- struct ceph_options *opts = osdc->client->options;
- unsigned long cutoff = jiffies - opts->osd_keepalive_timeout;
- LIST_HEAD(slow_osds);
- struct rb_node *n, *p;
- dout("%s osdc %p\n", __func__, osdc);
- down_write(&osdc->lock);
- /*
- * 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).
- */
- for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
- struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
- bool found = false;
- for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
- struct ceph_osd_request *req =
- rb_entry(p, struct ceph_osd_request, r_node);
- if (time_before(req->r_stamp, cutoff)) {
- dout(" req %p tid %llu on osd%d is laggy\n",
- req, req->r_tid, osd->o_osd);
- found = true;
- }
- }
- for (p = rb_first(&osd->o_linger_requests); p; p = rb_next(p)) {
- struct ceph_osd_linger_request *lreq =
- rb_entry(p, struct ceph_osd_linger_request, node);
- dout(" lreq %p linger_id %llu is served by osd%d\n",
- lreq, lreq->linger_id, osd->o_osd);
- found = true;
- mutex_lock(&lreq->lock);
- if (lreq->is_watch && lreq->committed && !lreq->last_error)
- send_linger_ping(lreq);
- mutex_unlock(&lreq->lock);
- }
- if (found)
- list_move_tail(&osd->o_keepalive_item, &slow_osds);
- }
- if (atomic_read(&osdc->num_homeless) || !list_empty(&slow_osds))
- maybe_request_map(osdc);
- while (!list_empty(&slow_osds)) {
- struct ceph_osd *osd = list_first_entry(&slow_osds,
- struct ceph_osd,
- o_keepalive_item);
- list_del_init(&osd->o_keepalive_item);
- ceph_con_keepalive(&osd->o_con);
- }
- up_write(&osdc->lock);
- schedule_delayed_work(&osdc->timeout_work,
- osdc->client->options->osd_keepalive_timeout);
- }
- 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 = osdc->client->options->osd_idle_ttl / 4;
- struct ceph_osd *osd, *nosd;
- dout("%s osdc %p\n", __func__, osdc);
- down_write(&osdc->lock);
- list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
- if (time_before(jiffies, osd->lru_ttl))
- break;
- WARN_ON(!RB_EMPTY_ROOT(&osd->o_requests));
- WARN_ON(!RB_EMPTY_ROOT(&osd->o_linger_requests));
- close_osd(osd);
- }
- up_write(&osdc->lock);
- schedule_delayed_work(&osdc->osds_timeout_work,
- round_jiffies_relative(delay));
- }
- 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) {
- bool changed = false;
- len = ceph_decode_32(p);
- if (len > 0) {
- ceph_decode_need(p, end, len, e_inval);
- if (!oloc->pool_ns ||
- ceph_compare_string(oloc->pool_ns, *p, len))
- changed = true;
- *p += len;
- } else {
- if (oloc->pool_ns)
- changed = true;
- }
- if (changed) {
- /* redirect changes namespace */
- pr_warn("ceph_object_locator::nspace is changed\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;
- }
- struct MOSDOpReply {
- struct ceph_pg pgid;
- u64 flags;
- int result;
- u32 epoch;
- int num_ops;
- u32 outdata_len[CEPH_OSD_MAX_OPS];
- s32 rval[CEPH_OSD_MAX_OPS];
- int retry_attempt;
- struct ceph_eversion replay_version;
- u64 user_version;
- struct ceph_request_redirect redirect;
- };
- static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m)
- {
- void *p = msg->front.iov_base;
- void *const end = p + msg->front.iov_len;
- u16 version = le16_to_cpu(msg->hdr.version);
- struct ceph_eversion bad_replay_version;
- u8 decode_redir;
- u32 len;
- int ret;
- int i;
- ceph_decode_32_safe(&p, end, len, e_inval);
- ceph_decode_need(&p, end, len, e_inval);
- p += len; /* skip oid */
- ret = ceph_decode_pgid(&p, end, &m->pgid);
- if (ret)
- return ret;
- ceph_decode_64_safe(&p, end, m->flags, e_inval);
- ceph_decode_32_safe(&p, end, m->result, e_inval);
- ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval);
- memcpy(&bad_replay_version, p, sizeof(bad_replay_version));
- p += sizeof(bad_replay_version);
- ceph_decode_32_safe(&p, end, m->epoch, e_inval);
- ceph_decode_32_safe(&p, end, m->num_ops, e_inval);
- if (m->num_ops > ARRAY_SIZE(m->outdata_len))
- goto e_inval;
- ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op),
- e_inval);
- for (i = 0; i < m->num_ops; i++) {
- struct ceph_osd_op *op = p;
- m->outdata_len[i] = le32_to_cpu(op->payload_len);
- p += sizeof(*op);
- }
- ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval);
- for (i = 0; i < m->num_ops; i++)
- ceph_decode_32_safe(&p, end, m->rval[i], e_inval);
- if (version >= 5) {
- ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval);
- memcpy(&m->replay_version, p, sizeof(m->replay_version));
- p += sizeof(m->replay_version);
- ceph_decode_64_safe(&p, end, m->user_version, e_inval);
- } else {
- m->replay_version = bad_replay_version; /* struct */
- m->user_version = le64_to_cpu(m->replay_version.version);
- }
- if (version >= 6) {
- if (version >= 7)
- ceph_decode_8_safe(&p, end, decode_redir, e_inval);
- else
- decode_redir = 1;
- } else {
- decode_redir = 0;
- }
- if (decode_redir) {
- ret = ceph_redirect_decode(&p, end, &m->redirect);
- if (ret)
- return ret;
- } else {
- ceph_oloc_init(&m->redirect.oloc);
- }
- return 0;
- e_inval:
- return -EINVAL;
- }
- /*
- * We are done with @req if
- * - @m is a safe reply, or
- * - @m is an unsafe reply and we didn't want a safe one
- */
- static bool done_request(const struct ceph_osd_request *req,
- const struct MOSDOpReply *m)
- {
- return (m->result < 0 ||
- (m->flags & CEPH_OSD_FLAG_ONDISK) ||
- !(req->r_flags & CEPH_OSD_FLAG_ONDISK));
- }
- /*
- * handle osd op reply. either call the callback if it is specified,
- * or do the completion to wake up the waiting thread.
- *
- * ->r_unsafe_callback is set? yes no
- *
- * first reply is OK (needed r_cb/r_completion, r_cb/r_completion,
- * any or needed/got safe) r_safe_completion r_safe_completion
- *
- * first reply is unsafe r_unsafe_cb(true) (nothing)
- *
- * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion,
- * r_safe_completion r_safe_completion
- */
- static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- struct ceph_osd_request *req;
- struct MOSDOpReply m;
- u64 tid = le64_to_cpu(msg->hdr.tid);
- u32 data_len = 0;
- bool already_acked;
- int ret;
- int i;
- dout("%s msg %p tid %llu\n", __func__, msg, tid);
- down_read(&osdc->lock);
- if (!osd_registered(osd)) {
- dout("%s osd%d unknown\n", __func__, osd->o_osd);
- goto out_unlock_osdc;
- }
- WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num));
- mutex_lock(&osd->lock);
- req = lookup_request(&osd->o_requests, tid);
- if (!req) {
- dout("%s osd%d tid %llu unknown\n", __func__, osd->o_osd, tid);
- goto out_unlock_session;
- }
- m.redirect.oloc.pool_ns = req->r_t.target_oloc.pool_ns;
- ret = decode_MOSDOpReply(msg, &m);
- m.redirect.oloc.pool_ns = NULL;
- if (ret) {
- pr_err("failed to decode MOSDOpReply for tid %llu: %d\n",
- req->r_tid, ret);
- ceph_msg_dump(msg);
- goto fail_request;
- }
- dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n",
- __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed,
- m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch),
- le64_to_cpu(m.replay_version.version), m.user_version);
- if (m.retry_attempt >= 0) {
- if (m.retry_attempt != req->r_attempts - 1) {
- dout("req %p tid %llu retry_attempt %d != %d, ignoring\n",
- req, req->r_tid, m.retry_attempt,
- req->r_attempts - 1);
- goto out_unlock_session;
- }
- } else {
- WARN_ON(1); /* MOSDOpReply v4 is assumed */
- }
- if (!ceph_oloc_empty(&m.redirect.oloc)) {
- dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid,
- m.redirect.oloc.pool);
- unlink_request(osd, req);
- mutex_unlock(&osd->lock);
- /*
- * Not ceph_oloc_copy() - changing pool_ns is not
- * supported.
- */
- req->r_t.target_oloc.pool = m.redirect.oloc.pool;
- req->r_flags |= CEPH_OSD_FLAG_REDIRECTED;
- req->r_tid = 0;
- __submit_request(req, false);
- goto out_unlock_osdc;
- }
- if (m.num_ops != req->r_num_ops) {
- pr_err("num_ops %d != %d for tid %llu\n", m.num_ops,
- req->r_num_ops, req->r_tid);
- goto fail_request;
- }
- for (i = 0; i < req->r_num_ops; i++) {
- dout(" req %p tid %llu op %d rval %d len %u\n", req,
- req->r_tid, i, m.rval[i], m.outdata_len[i]);
- req->r_ops[i].rval = m.rval[i];
- req->r_ops[i].outdata_len = m.outdata_len[i];
- data_len += m.outdata_len[i];
- }
- if (data_len != le32_to_cpu(msg->hdr.data_len)) {
- pr_err("sum of lens %u != %u for tid %llu\n", data_len,
- le32_to_cpu(msg->hdr.data_len), req->r_tid);
- goto fail_request;
- }
- dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__,
- req, req->r_tid, req->r_got_reply, m.result, data_len);
- already_acked = req->r_got_reply;
- if (!already_acked) {
- req->r_result = m.result ?: data_len;
- req->r_replay_version = m.replay_version; /* struct */
- req->r_got_reply = true;
- } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) {
- dout("req %p tid %llu dup ack\n", req, req->r_tid);
- goto out_unlock_session;
- }
- if (done_request(req, &m)) {
- __finish_request(req);
- if (req->r_linger) {
- WARN_ON(req->r_unsafe_callback);
- dout("req %p tid %llu cb (locked)\n", req, req->r_tid);
- __complete_request(req);
- }
- }
- mutex_unlock(&osd->lock);
- up_read(&osdc->lock);
- if (done_request(req, &m)) {
- if (already_acked && req->r_unsafe_callback) {
- dout("req %p tid %llu safe-cb\n", req, req->r_tid);
- req->r_unsafe_callback(req, false);
- } else if (!req->r_linger) {
- dout("req %p tid %llu cb\n", req, req->r_tid);
- __complete_request(req);
- }
- if (m.flags & CEPH_OSD_FLAG_ONDISK)
- complete_all(&req->r_safe_completion);
- ceph_osdc_put_request(req);
- } else {
- if (req->r_unsafe_callback) {
- dout("req %p tid %llu unsafe-cb\n", req, req->r_tid);
- req->r_unsafe_callback(req, true);
- } else {
- WARN_ON(1);
- }
- }
- return;
- fail_request:
- complete_request(req, -EIO);
- out_unlock_session:
- mutex_unlock(&osd->lock);
- out_unlock_osdc:
- up_read(&osdc->lock);
- }
- static void set_pool_was_full(struct ceph_osd_client *osdc)
- {
- struct rb_node *n;
- for (n = rb_first(&osdc->osdmap->pg_pools); n; n = rb_next(n)) {
- struct ceph_pg_pool_info *pi =
- rb_entry(n, struct ceph_pg_pool_info, node);
- pi->was_full = __pool_full(pi);
- }
- }
- static bool pool_cleared_full(struct ceph_osd_client *osdc, s64 pool_id)
- {
- struct ceph_pg_pool_info *pi;
- pi = ceph_pg_pool_by_id(osdc->osdmap, pool_id);
- if (!pi)
- return false;
- return pi->was_full && !__pool_full(pi);
- }
- static enum calc_target_result
- recalc_linger_target(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_client *osdc = lreq->osdc;
- enum calc_target_result ct_res;
- ct_res = calc_target(osdc, &lreq->t, &lreq->last_force_resend, true);
- if (ct_res == CALC_TARGET_NEED_RESEND) {
- struct ceph_osd *osd;
- osd = lookup_create_osd(osdc, lreq->t.osd, true);
- if (osd != lreq->osd) {
- unlink_linger(lreq->osd, lreq);
- link_linger(osd, lreq);
- }
- }
- return ct_res;
- }
- /*
- * Requeue requests whose mapping to an OSD has changed.
- */
- static void scan_requests(struct ceph_osd *osd,
- bool force_resend,
- bool cleared_full,
- bool check_pool_cleared_full,
- struct rb_root *need_resend,
- struct list_head *need_resend_linger)
- {
- struct ceph_osd_client *osdc = osd->o_osdc;
- struct rb_node *n;
- bool force_resend_writes;
- for (n = rb_first(&osd->o_linger_requests); n; ) {
- struct ceph_osd_linger_request *lreq =
- rb_entry(n, struct ceph_osd_linger_request, node);
- enum calc_target_result ct_res;
- n = rb_next(n); /* recalc_linger_target() */
- dout("%s lreq %p linger_id %llu\n", __func__, lreq,
- lreq->linger_id);
- ct_res = recalc_linger_target(lreq);
- switch (ct_res) {
- case CALC_TARGET_NO_ACTION:
- force_resend_writes = cleared_full ||
- (check_pool_cleared_full &&
- pool_cleared_full(osdc, lreq->t.base_oloc.pool));
- if (!force_resend && !force_resend_writes)
- break;
- /* fall through */
- case CALC_TARGET_NEED_RESEND:
- cancel_linger_map_check(lreq);
- /*
- * scan_requests() for the previous epoch(s)
- * may have already added it to the list, since
- * it's not unlinked here.
- */
- if (list_empty(&lreq->scan_item))
- list_add_tail(&lreq->scan_item, need_resend_linger);
- break;
- case CALC_TARGET_POOL_DNE:
- check_linger_pool_dne(lreq);
- break;
- }
- }
- for (n = rb_first(&osd->o_requests); n; ) {
- struct ceph_osd_request *req =
- rb_entry(n, struct ceph_osd_request, r_node);
- enum calc_target_result ct_res;
- n = rb_next(n); /* unlink_request(), check_pool_dne() */
- dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
- ct_res = calc_target(osdc, &req->r_t,
- &req->r_last_force_resend, false);
- switch (ct_res) {
- case CALC_TARGET_NO_ACTION:
- force_resend_writes = cleared_full ||
- (check_pool_cleared_full &&
- pool_cleared_full(osdc, req->r_t.base_oloc.pool));
- if (!force_resend &&
- (!(req->r_flags & CEPH_OSD_FLAG_WRITE) ||
- !force_resend_writes))
- break;
- /* fall through */
- case CALC_TARGET_NEED_RESEND:
- cancel_map_check(req);
- unlink_request(osd, req);
- insert_request(need_resend, req);
- break;
- case CALC_TARGET_POOL_DNE:
- check_pool_dne(req);
- break;
- }
- }
- }
- static int handle_one_map(struct ceph_osd_client *osdc,
- void *p, void *end, bool incremental,
- struct rb_root *need_resend,
- struct list_head *need_resend_linger)
- {
- struct ceph_osdmap *newmap;
- struct rb_node *n;
- bool skipped_map = false;
- bool was_full;
- was_full = ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
- set_pool_was_full(osdc);
- if (incremental)
- newmap = osdmap_apply_incremental(&p, end, osdc->osdmap);
- else
- newmap = ceph_osdmap_decode(&p, end);
- if (IS_ERR(newmap))
- return PTR_ERR(newmap);
- if (newmap != osdc->osdmap) {
- /*
- * Preserve ->was_full before destroying the old map.
- * For pools that weren't in the old map, ->was_full
- * should be false.
- */
- for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) {
- struct ceph_pg_pool_info *pi =
- rb_entry(n, struct ceph_pg_pool_info, node);
- struct ceph_pg_pool_info *old_pi;
- old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id);
- if (old_pi)
- pi->was_full = old_pi->was_full;
- else
- WARN_ON(pi->was_full);
- }
- if (osdc->osdmap->epoch &&
- osdc->osdmap->epoch + 1 < newmap->epoch) {
- WARN_ON(incremental);
- skipped_map = true;
- }
- ceph_osdmap_destroy(osdc->osdmap);
- osdc->osdmap = newmap;
- }
- was_full &= !ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL);
- scan_requests(&osdc->homeless_osd, skipped_map, was_full, true,
- need_resend, need_resend_linger);
- for (n = rb_first(&osdc->osds); n; ) {
- struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
- n = rb_next(n); /* close_osd() */
- scan_requests(osd, skipped_map, was_full, true, need_resend,
- need_resend_linger);
- 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)))
- close_osd(osd);
- }
- return 0;
- }
- static void kick_requests(struct ceph_osd_client *osdc,
- struct rb_root *need_resend,
- struct list_head *need_resend_linger)
- {
- struct ceph_osd_linger_request *lreq, *nlreq;
- struct rb_node *n;
- for (n = rb_first(need_resend); n; ) {
- struct ceph_osd_request *req =
- rb_entry(n, struct ceph_osd_request, r_node);
- struct ceph_osd *osd;
- n = rb_next(n);
- erase_request(need_resend, req); /* before link_request() */
- WARN_ON(req->r_osd);
- calc_target(osdc, &req->r_t, NULL, false);
- osd = lookup_create_osd(osdc, req->r_t.osd, true);
- link_request(osd, req);
- if (!req->r_linger) {
- if (!osd_homeless(osd) && !req->r_t.paused)
- send_request(req);
- } else {
- cancel_linger_request(req);
- }
- }
- list_for_each_entry_safe(lreq, nlreq, need_resend_linger, scan_item) {
- if (!osd_homeless(lreq->osd))
- send_linger(lreq);
- list_del_init(&lreq->scan_item);
- }
- }
- /*
- * 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 = msg->front.iov_base;
- void *const end = p + msg->front.iov_len;
- u32 nr_maps, maplen;
- u32 epoch;
- struct ceph_fsid fsid;
- struct rb_root need_resend = RB_ROOT;
- LIST_HEAD(need_resend_linger);
- bool handled_incremental = false;
- bool was_pauserd, was_pausewr;
- bool pauserd, pausewr;
- int err;
- dout("%s have %u\n", __func__, osdc->osdmap->epoch);
- down_write(&osdc->lock);
- /* verify fsid */
- ceph_decode_need(&p, end, sizeof(fsid), bad);
- ceph_decode_copy(&p, &fsid, sizeof(fsid));
- if (ceph_check_fsid(osdc->client, &fsid) < 0)
- goto bad;
- was_pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
- was_pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
- have_pool_full(osdc);
- /* 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);
- epoch = ceph_decode_32(&p);
- maplen = ceph_decode_32(&p);
- ceph_decode_need(&p, end, maplen, bad);
- if (osdc->osdmap->epoch &&
- osdc->osdmap->epoch + 1 == epoch) {
- dout("applying incremental map %u len %d\n",
- epoch, maplen);
- err = handle_one_map(osdc, p, p + maplen, true,
- &need_resend, &need_resend_linger);
- if (err)
- goto bad;
- handled_incremental = true;
- } else {
- dout("ignoring incremental map %u len %d\n",
- epoch, maplen);
- }
- p += maplen;
- nr_maps--;
- }
- if (handled_incremental)
- 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);
- epoch = ceph_decode_32(&p);
- maplen = ceph_decode_32(&p);
- 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->epoch >= epoch) {
- dout("skipping full map %u len %d, "
- "older than our %u\n", epoch, maplen,
- osdc->osdmap->epoch);
- } else {
- dout("taking full map %u len %d\n", epoch, maplen);
- err = handle_one_map(osdc, p, p + maplen, false,
- &need_resend, &need_resend_linger);
- if (err)
- goto bad;
- }
- p += maplen;
- nr_maps--;
- }
- done:
- /*
- * subscribe to subsequent osdmap updates if full to ensure
- * we find out when we are no longer full and stop returning
- * ENOSPC.
- */
- pauserd = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSERD);
- pausewr = ceph_osdmap_flag(osdc, CEPH_OSDMAP_PAUSEWR) ||
- ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) ||
- have_pool_full(osdc);
- if (was_pauserd || was_pausewr || pauserd || pausewr)
- maybe_request_map(osdc);
- kick_requests(osdc, &need_resend, &need_resend_linger);
- ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP,
- osdc->osdmap->epoch);
- up_write(&osdc->lock);
- wake_up_all(&osdc->client->auth_wq);
- return;
- bad:
- pr_err("osdc handle_map corrupt msg\n");
- ceph_msg_dump(msg);
- up_write(&osdc->lock);
- }
- /*
- * Resubmit requests pending on the given osd.
- */
- static void kick_osd_requests(struct ceph_osd *osd)
- {
- struct rb_node *n;
- for (n = rb_first(&osd->o_requests); n; ) {
- struct ceph_osd_request *req =
- rb_entry(n, struct ceph_osd_request, r_node);
- n = rb_next(n); /* cancel_linger_request() */
- if (!req->r_linger) {
- if (!req->r_t.paused)
- send_request(req);
- } else {
- cancel_linger_request(req);
- }
- }
- for (n = rb_first(&osd->o_linger_requests); n; n = rb_next(n)) {
- struct ceph_osd_linger_request *lreq =
- rb_entry(n, struct ceph_osd_linger_request, node);
- send_linger(lreq);
- }
- }
- /*
- * If the osd connection drops, we need to resubmit all requests.
- */
- static void osd_fault(struct ceph_connection *con)
- {
- struct ceph_osd *osd = con->private;
- struct ceph_osd_client *osdc = osd->o_osdc;
- dout("%s osd %p osd%d\n", __func__, osd, osd->o_osd);
- down_write(&osdc->lock);
- if (!osd_registered(osd)) {
- dout("%s osd%d unknown\n", __func__, osd->o_osd);
- goto out_unlock;
- }
- if (!reopen_osd(osd))
- kick_osd_requests(osd);
- maybe_request_map(osdc);
- out_unlock:
- up_write(&osdc->lock);
- }
- /*
- * Process osd watch notifications
- */
- static void handle_watch_notify(struct ceph_osd_client *osdc,
- struct ceph_msg *msg)
- {
- void *p = msg->front.iov_base;
- void *const end = p + msg->front.iov_len;
- struct ceph_osd_linger_request *lreq;
- struct linger_work *lwork;
- u8 proto_ver, opcode;
- u64 cookie, notify_id;
- u64 notifier_id = 0;
- s32 return_code = 0;
- void *payload = NULL;
- u32 payload_len = 0;
- 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);
- p += 8; /* skip ver */
- ceph_decode_64_safe(&p, end, notify_id, bad);
- if (proto_ver >= 1) {
- ceph_decode_32_safe(&p, end, payload_len, bad);
- ceph_decode_need(&p, end, payload_len, bad);
- payload = p;
- p += payload_len;
- }
- if (le16_to_cpu(msg->hdr.version) >= 2)
- ceph_decode_32_safe(&p, end, return_code, bad);
- if (le16_to_cpu(msg->hdr.version) >= 3)
- ceph_decode_64_safe(&p, end, notifier_id, bad);
- down_read(&osdc->lock);
- lreq = lookup_linger_osdc(&osdc->linger_requests, cookie);
- if (!lreq) {
- dout("%s opcode %d cookie %llu dne\n", __func__, opcode,
- cookie);
- goto out_unlock_osdc;
- }
- mutex_lock(&lreq->lock);
- dout("%s opcode %d cookie %llu lreq %p is_watch %d\n", __func__,
- opcode, cookie, lreq, lreq->is_watch);
- if (opcode == CEPH_WATCH_EVENT_DISCONNECT) {
- if (!lreq->last_error) {
- lreq->last_error = -ENOTCONN;
- queue_watch_error(lreq);
- }
- } else if (!lreq->is_watch) {
- /* CEPH_WATCH_EVENT_NOTIFY_COMPLETE */
- if (lreq->notify_id && lreq->notify_id != notify_id) {
- dout("lreq %p notify_id %llu != %llu, ignoring\n", lreq,
- lreq->notify_id, notify_id);
- } else if (!completion_done(&lreq->notify_finish_wait)) {
- struct ceph_msg_data *data =
- list_first_entry_or_null(&msg->data,
- struct ceph_msg_data,
- links);
- if (data) {
- if (lreq->preply_pages) {
- WARN_ON(data->type !=
- CEPH_MSG_DATA_PAGES);
- *lreq->preply_pages = data->pages;
- *lreq->preply_len = data->length;
- } else {
- ceph_release_page_vector(data->pages,
- calc_pages_for(0, data->length));
- }
- }
- lreq->notify_finish_error = return_code;
- complete_all(&lreq->notify_finish_wait);
- }
- } else {
- /* CEPH_WATCH_EVENT_NOTIFY */
- lwork = lwork_alloc(lreq, do_watch_notify);
- if (!lwork) {
- pr_err("failed to allocate notify-lwork\n");
- goto out_unlock_lreq;
- }
- lwork->notify.notify_id = notify_id;
- lwork->notify.notifier_id = notifier_id;
- lwork->notify.payload = payload;
- lwork->notify.payload_len = payload_len;
- lwork->notify.msg = ceph_msg_get(msg);
- lwork_queue(lwork);
- }
- out_unlock_lreq:
- mutex_unlock(&lreq->lock);
- out_unlock_osdc:
- up_read(&osdc->lock);
- return;
- bad:
- pr_err("osdc handle_watch_notify corrupt msg\n");
- }
- /*
- * Register request, send initial attempt.
- */
- int ceph_osdc_start_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req,
- bool nofail)
- {
- down_read(&osdc->lock);
- submit_request(req, false);
- up_read(&osdc->lock);
- return 0;
- }
- EXPORT_SYMBOL(ceph_osdc_start_request);
- /*
- * 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;
- down_write(&osdc->lock);
- if (req->r_osd)
- cancel_request(req);
- up_write(&osdc->lock);
- }
- EXPORT_SYMBOL(ceph_osdc_cancel_request);
- /*
- * @timeout: in jiffies, 0 means "wait forever"
- */
- static int wait_request_timeout(struct ceph_osd_request *req,
- unsigned long timeout)
- {
- long left;
- dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
- left = wait_for_completion_killable_timeout(&req->r_completion,
- ceph_timeout_jiffies(timeout));
- if (left <= 0) {
- left = left ?: -ETIMEDOUT;
- ceph_osdc_cancel_request(req);
- /* kludge - need to to wake ceph_osdc_sync() */
- complete_all(&req->r_safe_completion);
- } else {
- left = req->r_result; /* completed */
- }
- return left;
- }
- /*
- * wait for a request to complete
- */
- int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
- struct ceph_osd_request *req)
- {
- return wait_request_timeout(req, 0);
- }
- EXPORT_SYMBOL(ceph_osdc_wait_request);
- /*
- * sync - wait for all in-flight requests to flush. avoid starvation.
- */
- void ceph_osdc_sync(struct ceph_osd_client *osdc)
- {
- struct rb_node *n, *p;
- u64 last_tid = atomic64_read(&osdc->last_tid);
- again:
- down_read(&osdc->lock);
- for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
- struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
- mutex_lock(&osd->lock);
- for (p = rb_first(&osd->o_requests); p; p = rb_next(p)) {
- struct ceph_osd_request *req =
- rb_entry(p, struct ceph_osd_request, r_node);
- if (req->r_tid > last_tid)
- break;
- if (!(req->r_flags & CEPH_OSD_FLAG_WRITE))
- continue;
- ceph_osdc_get_request(req);
- mutex_unlock(&osd->lock);
- up_read(&osdc->lock);
- dout("%s waiting on req %p tid %llu last_tid %llu\n",
- __func__, req, req->r_tid, last_tid);
- wait_for_completion(&req->r_safe_completion);
- ceph_osdc_put_request(req);
- goto again;
- }
- mutex_unlock(&osd->lock);
- }
- up_read(&osdc->lock);
- dout("%s done last_tid %llu\n", __func__, last_tid);
- }
- EXPORT_SYMBOL(ceph_osdc_sync);
- static struct ceph_osd_request *
- alloc_linger_request(struct ceph_osd_linger_request *lreq)
- {
- struct ceph_osd_request *req;
- req = ceph_osdc_alloc_request(lreq->osdc, NULL, 1, false, GFP_NOIO);
- if (!req)
- return NULL;
- ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
- ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
- if (ceph_osdc_alloc_messages(req, GFP_NOIO)) {
- ceph_osdc_put_request(req);
- return NULL;
- }
- return req;
- }
- /*
- * Returns a handle, caller owns a ref.
- */
- struct ceph_osd_linger_request *
- ceph_osdc_watch(struct ceph_osd_client *osdc,
- struct ceph_object_id *oid,
- struct ceph_object_locator *oloc,
- rados_watchcb2_t wcb,
- rados_watcherrcb_t errcb,
- void *data)
- {
- struct ceph_osd_linger_request *lreq;
- int ret;
- lreq = linger_alloc(osdc);
- if (!lreq)
- return ERR_PTR(-ENOMEM);
- lreq->is_watch = true;
- lreq->wcb = wcb;
- lreq->errcb = errcb;
- lreq->data = data;
- lreq->watch_valid_thru = jiffies;
- ceph_oid_copy(&lreq->t.base_oid, oid);
- ceph_oloc_copy(&lreq->t.base_oloc, oloc);
- lreq->t.flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
- lreq->mtime = CURRENT_TIME;
- lreq->reg_req = alloc_linger_request(lreq);
- if (!lreq->reg_req) {
- ret = -ENOMEM;
- goto err_put_lreq;
- }
- lreq->ping_req = alloc_linger_request(lreq);
- if (!lreq->ping_req) {
- ret = -ENOMEM;
- goto err_put_lreq;
- }
- down_write(&osdc->lock);
- linger_register(lreq); /* before osd_req_op_* */
- osd_req_op_watch_init(lreq->reg_req, 0, lreq->linger_id,
- CEPH_OSD_WATCH_OP_WATCH);
- osd_req_op_watch_init(lreq->ping_req, 0, lreq->linger_id,
- CEPH_OSD_WATCH_OP_PING);
- linger_submit(lreq);
- up_write(&osdc->lock);
- ret = linger_reg_commit_wait(lreq);
- if (ret) {
- linger_cancel(lreq);
- goto err_put_lreq;
- }
- return lreq;
- err_put_lreq:
- linger_put(lreq);
- return ERR_PTR(ret);
- }
- EXPORT_SYMBOL(ceph_osdc_watch);
- /*
- * Releases a ref.
- *
- * Times out after mount_timeout to preserve rbd unmap behaviour
- * introduced in 2894e1d76974 ("rbd: timeout watch teardown on unmap
- * with mount_timeout").
- */
- int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
- struct ceph_osd_linger_request *lreq)
- {
- struct ceph_options *opts = osdc->client->options;
- struct ceph_osd_request *req;
- int ret;
- req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
- if (!req)
- return -ENOMEM;
- ceph_oid_copy(&req->r_base_oid, &lreq->t.base_oid);
- ceph_oloc_copy(&req->r_base_oloc, &lreq->t.base_oloc);
- req->r_flags = CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK;
- req->r_mtime = CURRENT_TIME;
- osd_req_op_watch_init(req, 0, lreq->linger_id,
- CEPH_OSD_WATCH_OP_UNWATCH);
- ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
- if (ret)
- goto out_put_req;
- ceph_osdc_start_request(osdc, req, false);
- linger_cancel(lreq);
- linger_put(lreq);
- ret = wait_request_timeout(req, opts->mount_timeout);
- out_put_req:
- ceph_osdc_put_request(req);
- return ret;
- }
- EXPORT_SYMBOL(ceph_osdc_unwatch);
- static int osd_req_op_notify_ack_init(struct ceph_osd_request *req, int which,
- u64 notify_id, u64 cookie, void *payload,
- size_t payload_len)
- {
- struct ceph_osd_req_op *op;
- struct ceph_pagelist *pl;
- int ret;
- op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY_ACK, 0);
- pl = kmalloc(sizeof(*pl), GFP_NOIO);
- if (!pl)
- return -ENOMEM;
- ceph_pagelist_init(pl);
- ret = ceph_pagelist_encode_64(pl, notify_id);
- ret |= ceph_pagelist_encode_64(pl, cookie);
- if (payload) {
- ret |= ceph_pagelist_encode_32(pl, payload_len);
- ret |= ceph_pagelist_append(pl, payload, payload_len);
- } else {
- ret |= ceph_pagelist_encode_32(pl, 0);
- }
- if (ret) {
- ceph_pagelist_release(pl);
- return -ENOMEM;
- }
- ceph_osd_data_pagelist_init(&op->notify_ack.request_data, pl);
- op->indata_len = pl->length;
- return 0;
- }
- int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
- struct ceph_object_id *oid,
- struct ceph_object_locator *oloc,
- u64 notify_id,
- u64 cookie,
- void *payload,
- size_t payload_len)
- {
- struct ceph_osd_request *req;
- int ret;
- req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
- if (!req)
- return -ENOMEM;
- ceph_oid_copy(&req->r_base_oid, oid);
- ceph_oloc_copy(&req->r_base_oloc, oloc);
- req->r_flags = CEPH_OSD_FLAG_READ;
- ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
- if (ret)
- goto out_put_req;
- ret = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload,
- payload_len);
- if (ret)
- goto out_put_req;
- ceph_osdc_start_request(osdc, req, false);
- ret = ceph_osdc_wait_request(osdc, req);
- out_put_req:
- ceph_osdc_put_request(req);
- return ret;
- }
- EXPORT_SYMBOL(ceph_osdc_notify_ack);
- static int osd_req_op_notify_init(struct ceph_osd_request *req, int which,
- u64 cookie, u32 prot_ver, u32 timeout,
- void *payload, size_t payload_len)
- {
- struct ceph_osd_req_op *op;
- struct ceph_pagelist *pl;
- int ret;
- op = _osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0);
- op->notify.cookie = cookie;
- pl = kmalloc(sizeof(*pl), GFP_NOIO);
- if (!pl)
- return -ENOMEM;
- ceph_pagelist_init(pl);
- ret = ceph_pagelist_encode_32(pl, 1); /* prot_ver */
- ret |= ceph_pagelist_encode_32(pl, timeout);
- ret |= ceph_pagelist_encode_32(pl, payload_len);
- ret |= ceph_pagelist_append(pl, payload, payload_len);
- if (ret) {
- ceph_pagelist_release(pl);
- return -ENOMEM;
- }
- ceph_osd_data_pagelist_init(&op->notify.request_data, pl);
- op->indata_len = pl->length;
- return 0;
- }
- /*
- * @timeout: in seconds
- *
- * @preply_{pages,len} are initialized both on success and error.
- * The caller is responsible for:
- *
- * ceph_release_page_vector(reply_pages, calc_pages_for(0, reply_len))
- */
- int ceph_osdc_notify(struct ceph_osd_client *osdc,
- struct ceph_object_id *oid,
- struct ceph_object_locator *oloc,
- void *payload,
- size_t payload_len,
- u32 timeout,
- struct page ***preply_pages,
- size_t *preply_len)
- {
- struct ceph_osd_linger_request *lreq;
- struct page **pages;
- int ret;
- WARN_ON(!timeout);
- if (preply_pages) {
- *preply_pages = NULL;
- *preply_len = 0;
- }
- lreq = linger_alloc(osdc);
- if (!lreq)
- return -ENOMEM;
- lreq->preply_pages = preply_pages;
- lreq->preply_len = preply_len;
- ceph_oid_copy(&lreq->t.base_oid, oid);
- ceph_oloc_copy(&lreq->t.base_oloc, oloc);
- lreq->t.flags = CEPH_OSD_FLAG_READ;
- lreq->reg_req = alloc_linger_request(lreq);
- if (!lreq->reg_req) {
- ret = -ENOMEM;
- goto out_put_lreq;
- }
- /* for notify_id */
- pages = ceph_alloc_page_vector(1, GFP_NOIO);
- if (IS_ERR(pages)) {
- ret = PTR_ERR(pages);
- goto out_put_lreq;
- }
- down_write(&osdc->lock);
- linger_register(lreq); /* before osd_req_op_* */
- ret = osd_req_op_notify_init(lreq->reg_req, 0, lreq->linger_id, 1,
- timeout, payload, payload_len);
- if (ret) {
- linger_unregister(lreq);
- up_write(&osdc->lock);
- ceph_release_page_vector(pages, 1);
- goto out_put_lreq;
- }
- ceph_osd_data_pages_init(osd_req_op_data(lreq->reg_req, 0, notify,
- response_data),
- pages, PAGE_SIZE, 0, false, true);
- linger_submit(lreq);
- up_write(&osdc->lock);
- ret = linger_reg_commit_wait(lreq);
- if (!ret)
- ret = linger_notify_finish_wait(lreq);
- else
- dout("lreq %p failed to initiate notify %d\n", lreq, ret);
- linger_cancel(lreq);
- out_put_lreq:
- linger_put(lreq);
- return ret;
- }
- EXPORT_SYMBOL(ceph_osdc_notify);
- /*
- * Return the number of milliseconds since the watch was last
- * confirmed, or an error. If there is an error, the watch is no
- * longer valid, and should be destroyed with ceph_osdc_unwatch().
- */
- int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
- struct ceph_osd_linger_request *lreq)
- {
- unsigned long stamp, age;
- int ret;
- down_read(&osdc->lock);
- mutex_lock(&lreq->lock);
- stamp = lreq->watch_valid_thru;
- if (!list_empty(&lreq->pending_lworks)) {
- struct linger_work *lwork =
- list_first_entry(&lreq->pending_lworks,
- struct linger_work,
- pending_item);
- if (time_before(lwork->queued_stamp, stamp))
- stamp = lwork->queued_stamp;
- }
- age = jiffies - stamp;
- dout("%s lreq %p linger_id %llu age %lu last_error %d\n", __func__,
- lreq, lreq->linger_id, age, lreq->last_error);
- /* we are truncating to msecs, so return a safe upper bound */
- ret = lreq->last_error ?: 1 + jiffies_to_msecs(age);
- mutex_unlock(&lreq->lock);
- up_read(&osdc->lock);
- return ret;
- }
- static int decode_watcher(void **p, void *end, struct ceph_watch_item *item)
- {
- u8 struct_v;
- u32 struct_len;
- int ret;
- ret = ceph_start_decoding(p, end, 2, "watch_item_t",
- &struct_v, &struct_len);
- if (ret)
- return ret;
- ceph_decode_copy(p, &item->name, sizeof(item->name));
- item->cookie = ceph_decode_64(p);
- *p += 4; /* skip timeout_seconds */
- if (struct_v >= 2) {
- ceph_decode_copy(p, &item->addr, sizeof(item->addr));
- ceph_decode_addr(&item->addr);
- }
- dout("%s %s%llu cookie %llu addr %s\n", __func__,
- ENTITY_NAME(item->name), item->cookie,
- ceph_pr_addr(&item->addr.in_addr));
- return 0;
- }
- static int decode_watchers(void **p, void *end,
- struct ceph_watch_item **watchers,
- u32 *num_watchers)
- {
- u8 struct_v;
- u32 struct_len;
- int i;
- int ret;
- ret = ceph_start_decoding(p, end, 1, "obj_list_watch_response_t",
- &struct_v, &struct_len);
- if (ret)
- return ret;
- *num_watchers = ceph_decode_32(p);
- *watchers = kcalloc(*num_watchers, sizeof(**watchers), GFP_NOIO);
- if (!*watchers)
- return -ENOMEM;
- for (i = 0; i < *num_watchers; i++) {
- ret = decode_watcher(p, end, *watchers + i);
- if (ret) {
- kfree(*watchers);
- return ret;
- }
- }
- return 0;
- }
- /*
- * On success, the caller is responsible for:
- *
- * kfree(watchers);
- */
- int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
- struct ceph_object_id *oid,
- struct ceph_object_locator *oloc,
- struct ceph_watch_item **watchers,
- u32 *num_watchers)
- {
- struct ceph_osd_request *req;
- struct page **pages;
- int ret;
- req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
- if (!req)
- return -ENOMEM;
- ceph_oid_copy(&req->r_base_oid, oid);
- ceph_oloc_copy(&req->r_base_oloc, oloc);
- req->r_flags = CEPH_OSD_FLAG_READ;
- ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
- if (ret)
- goto out_put_req;
- pages = ceph_alloc_page_vector(1, GFP_NOIO);
- if (IS_ERR(pages)) {
- ret = PTR_ERR(pages);
- goto out_put_req;
- }
- osd_req_op_init(req, 0, CEPH_OSD_OP_LIST_WATCHERS, 0);
- ceph_osd_data_pages_init(osd_req_op_data(req, 0, list_watchers,
- response_data),
- pages, PAGE_SIZE, 0, false, true);
- ceph_osdc_start_request(osdc, req, false);
- ret = ceph_osdc_wait_request(osdc, req);
- if (ret >= 0) {
- void *p = page_address(pages[0]);
- void *const end = p + req->r_ops[0].outdata_len;
- ret = decode_watchers(&p, end, watchers, num_watchers);
- }
- out_put_req:
- ceph_osdc_put_request(req);
- return ret;
- }
- EXPORT_SYMBOL(ceph_osdc_list_watchers);
- /*
- * Call all pending notify callbacks - for use after a watch is
- * unregistered, to make sure no more callbacks for it will be invoked
- */
- void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
- {
- dout("%s osdc %p\n", __func__, osdc);
- flush_workqueue(osdc->notify_wq);
- }
- EXPORT_SYMBOL(ceph_osdc_flush_notifies);
- void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc)
- {
- down_read(&osdc->lock);
- maybe_request_map(osdc);
- up_read(&osdc->lock);
- }
- EXPORT_SYMBOL(ceph_osdc_maybe_request_map);
- /*
- * Execute an OSD class method on an object.
- *
- * @flags: CEPH_OSD_FLAG_*
- * @resp_len: out param for reply length
- */
- int ceph_osdc_call(struct ceph_osd_client *osdc,
- struct ceph_object_id *oid,
- struct ceph_object_locator *oloc,
- const char *class, const char *method,
- unsigned int flags,
- struct page *req_page, size_t req_len,
- struct page *resp_page, size_t *resp_len)
- {
- struct ceph_osd_request *req;
- int ret;
- req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO);
- if (!req)
- return -ENOMEM;
- ceph_oid_copy(&req->r_base_oid, oid);
- ceph_oloc_copy(&req->r_base_oloc, oloc);
- req->r_flags = flags;
- ret = ceph_osdc_alloc_messages(req, GFP_NOIO);
- if (ret)
- goto out_put_req;
- osd_req_op_cls_init(req, 0, CEPH_OSD_OP_CALL, class, method);
- if (req_page)
- osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len,
- 0, false, false);
- if (resp_page)
- osd_req_op_cls_response_data_pages(req, 0, &resp_page,
- PAGE_SIZE, 0, false, false);
- ceph_osdc_start_request(osdc, req, false);
- ret = ceph_osdc_wait_request(osdc, req);
- if (ret >= 0) {
- ret = req->r_ops[0].rval;
- if (resp_page)
- *resp_len = req->r_ops[0].outdata_len;
- }
- out_put_req:
- ceph_osdc_put_request(req);
- return ret;
- }
- EXPORT_SYMBOL(ceph_osdc_call);
- /*
- * init, shutdown
- */
- int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
- {
- int err;
- dout("init\n");
- osdc->client = client;
- init_rwsem(&osdc->lock);
- osdc->osds = RB_ROOT;
- INIT_LIST_HEAD(&osdc->osd_lru);
- spin_lock_init(&osdc->osd_lru_lock);
- osd_init(&osdc->homeless_osd);
- osdc->homeless_osd.o_osdc = osdc;
- osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
- osdc->last_linger_id = CEPH_LINGER_ID_START;
- osdc->linger_requests = RB_ROOT;
- osdc->map_checks = RB_ROOT;
- osdc->linger_map_checks = RB_ROOT;
- INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
- INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
- err = -ENOMEM;
- osdc->osdmap = ceph_osdmap_alloc();
- if (!osdc->osdmap)
- goto out;
- osdc->req_mempool = mempool_create_slab_pool(10,
- ceph_osd_request_cache);
- if (!osdc->req_mempool)
- goto out_map;
- err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
- PAGE_SIZE, 10, true, "osd_op");
- if (err < 0)
- goto out_mempool;
- err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
- PAGE_SIZE, 10, true, "osd_op_reply");
- if (err < 0)
- goto out_msgpool;
- err = -ENOMEM;
- osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
- if (!osdc->notify_wq)
- goto out_msgpool_reply;
- schedule_delayed_work(&osdc->timeout_work,
- osdc->client->options->osd_keepalive_timeout);
- schedule_delayed_work(&osdc->osds_timeout_work,
- round_jiffies_relative(osdc->client->options->osd_idle_ttl));
- return 0;
- out_msgpool_reply:
- ceph_msgpool_destroy(&osdc->msgpool_op_reply);
- out_msgpool:
- ceph_msgpool_destroy(&osdc->msgpool_op);
- out_mempool:
- mempool_destroy(osdc->req_mempool);
- out_map:
- ceph_osdmap_destroy(osdc->osdmap);
- out:
- return err;
- }
- void ceph_osdc_stop(struct ceph_osd_client *osdc)
- {
- flush_workqueue(osdc->notify_wq);
- destroy_workqueue(osdc->notify_wq);
- cancel_delayed_work_sync(&osdc->timeout_work);
- cancel_delayed_work_sync(&osdc->osds_timeout_work);
- down_write(&osdc->lock);
- while (!RB_EMPTY_ROOT(&osdc->osds)) {
- struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
- struct ceph_osd, o_node);
- close_osd(osd);
- }
- up_write(&osdc->lock);
- WARN_ON(atomic_read(&osdc->homeless_osd.o_ref) != 1);
- osd_cleanup(&osdc->homeless_osd);
- WARN_ON(!list_empty(&osdc->osd_lru));
- WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
- WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
- WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
- WARN_ON(atomic_read(&osdc->num_requests));
- WARN_ON(atomic_read(&osdc->num_homeless));
- ceph_osdmap_destroy(osdc->osdmap);
- mempool_destroy(osdc->req_mempool);
- ceph_msgpool_destroy(&osdc->msgpool_op);
- ceph_msgpool_destroy(&osdc->msgpool_op_reply);
- }
- /*
- * 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,
- struct page **pages, int num_pages, int page_align)
- {
- struct ceph_osd_request *req;
- int rc = 0;
- dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
- vino.snap, off, *plen);
- req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1,
- CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
- NULL, truncate_seq, truncate_size,
- false);
- if (IS_ERR(req))
- return PTR_ERR(req);
- /* it may be a short read due to an object boundary */
- osd_req_op_extent_osd_data_pages(req, 0,
- pages, *plen, page_align, false, false);
- dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
- off, *plen, *plen, page_align);
- 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;
- }
- EXPORT_SYMBOL(ceph_osdc_readpages);
- /*
- * 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,
- struct page **pages, int num_pages)
- {
- struct ceph_osd_request *req;
- int rc = 0;
- int page_align = off & ~PAGE_MASK;
- req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1,
- CEPH_OSD_OP_WRITE,
- CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
- snapc, truncate_seq, truncate_size,
- true);
- if (IS_ERR(req))
- return PTR_ERR(req);
- /* it may be a short write due to an object boundary */
- osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
- false, false);
- dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
- req->r_mtime = *mtime;
- rc = ceph_osdc_start_request(osdc, req, true);
- 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;
- }
- EXPORT_SYMBOL(ceph_osdc_writepages);
- int ceph_osdc_setup(void)
- {
- size_t size = sizeof(struct ceph_osd_request) +
- CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op);
- BUG_ON(ceph_osd_request_cache);
- ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size,
- 0, 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);
- /*
- * handle incoming message
- */
- static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
- {
- struct ceph_osd *osd = con->private;
- struct ceph_osd_client *osdc = osd->o_osdc;
- int type = le16_to_cpu(msg->hdr.type);
- switch (type) {
- case CEPH_MSG_OSD_MAP:
- ceph_osdc_handle_map(osdc, msg);
- break;
- case CEPH_MSG_OSD_OPREPLY:
- handle_reply(osd, msg);
- break;
- case CEPH_MSG_WATCH_NOTIFY:
- handle_watch_notify(osdc, msg);
- break;
- default:
- pr_err("received unknown message type %d %s\n", type,
- ceph_msg_type_name(type));
- }
- ceph_msg_put(msg);
- }
- /*
- * Lookup and return message for incoming reply. Don't try to do
- * anything about a larger than preallocated data portion of the
- * message at the moment - for now, just skip the message.
- */
- static struct ceph_msg *get_reply(struct ceph_connection *con,
- struct ceph_msg_header *hdr,
- int *skip)
- {
- struct ceph_osd *osd = con->private;
- struct ceph_osd_client *osdc = osd->o_osdc;
- struct ceph_msg *m = NULL;
- struct ceph_osd_request *req;
- int front_len = le32_to_cpu(hdr->front_len);
- int data_len = le32_to_cpu(hdr->data_len);
- u64 tid = le64_to_cpu(hdr->tid);
- down_read(&osdc->lock);
- if (!osd_registered(osd)) {
- dout("%s osd%d unknown, skipping\n", __func__, osd->o_osd);
- *skip = 1;
- goto out_unlock_osdc;
- }
- WARN_ON(osd->o_osd != le64_to_cpu(hdr->src.num));
- mutex_lock(&osd->lock);
- req = lookup_request(&osd->o_requests, tid);
- if (!req) {
- dout("%s osd%d tid %llu unknown, skipping\n", __func__,
- osd->o_osd, tid);
- *skip = 1;
- goto out_unlock_session;
- }
- ceph_msg_revoke_incoming(req->r_reply);
- if (front_len > req->r_reply->front_alloc_len) {
- pr_warn("%s osd%d tid %llu front %d > preallocated %d\n",
- __func__, osd->o_osd, req->r_tid, front_len,
- req->r_reply->front_alloc_len);
- m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
- false);
- if (!m)
- goto out_unlock_session;
- ceph_msg_put(req->r_reply);
- req->r_reply = m;
- }
- if (data_len > req->r_reply->data_length) {
- pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
- __func__, osd->o_osd, req->r_tid, data_len,
- req->r_reply->data_length);
- m = NULL;
- *skip = 1;
- goto out_unlock_session;
- }
- m = ceph_msg_get(req->r_reply);
- dout("get_reply tid %lld %p\n", tid, m);
- out_unlock_session:
- mutex_unlock(&osd->lock);
- out_unlock_osdc:
- up_read(&osdc->lock);
- return m;
- }
- /*
- * TODO: switch to a msg-owned pagelist
- */
- static struct ceph_msg *alloc_msg_with_page_vector(struct ceph_msg_header *hdr)
- {
- struct ceph_msg *m;
- int type = le16_to_cpu(hdr->type);
- u32 front_len = le32_to_cpu(hdr->front_len);
- u32 data_len = le32_to_cpu(hdr->data_len);
- m = ceph_msg_new(type, front_len, GFP_NOIO, false);
- if (!m)
- return NULL;
- if (data_len) {
- struct page **pages;
- struct ceph_osd_data osd_data;
- pages = ceph_alloc_page_vector(calc_pages_for(0, data_len),
- GFP_NOIO);
- if (IS_ERR(pages)) {
- ceph_msg_put(m);
- return NULL;
- }
- ceph_osd_data_pages_init(&osd_data, pages, data_len, 0, false,
- false);
- ceph_osdc_msg_data_add(m, &osd_data);
- }
- return m;
- }
- 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);
- *skip = 0;
- switch (type) {
- case CEPH_MSG_OSD_MAP:
- case CEPH_MSG_WATCH_NOTIFY:
- return alloc_msg_with_page_vector(hdr);
- case CEPH_MSG_OSD_OPREPLY:
- return get_reply(con, hdr, skip);
- default:
- pr_warn("%s osd%d unknown msg type %d, skipping\n", __func__,
- osd->o_osd, type);
- *skip = 1;
- return NULL;
- }
- }
- /*
- * 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);
- }
- /*
- * authentication
- */
- /*
- * 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,
- int *proto, int force_new)
- {
- struct ceph_osd *o = con->private;
- struct ceph_osd_client *osdc = o->o_osdc;
- struct ceph_auth_client *ac = osdc->client->monc.auth;
- struct ceph_auth_handshake *auth = &o->o_auth;
- if (force_new && auth->authorizer) {
- ceph_auth_destroy_authorizer(auth->authorizer);
- auth->authorizer = NULL;
- }
- if (!auth->authorizer) {
- int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
- auth);
- if (ret)
- return ERR_PTR(ret);
- } else {
- int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
- auth);
- if (ret)
- return ERR_PTR(ret);
- }
- *proto = ac->protocol;
- return auth;
- }
- static int add_authorizer_challenge(struct ceph_connection *con,
- void *challenge_buf, int challenge_buf_len)
- {
- struct ceph_osd *o = con->private;
- struct ceph_osd_client *osdc = o->o_osdc;
- struct ceph_auth_client *ac = osdc->client->monc.auth;
- return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer,
- challenge_buf, challenge_buf_len);
- }
- static int verify_authorizer_reply(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;
- return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer);
- }
- 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;
- ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
- return ceph_monc_validate_auth(&osdc->client->monc);
- }
- static int osd_sign_message(struct ceph_msg *msg)
- {
- struct ceph_osd *o = msg->con->private;
- struct ceph_auth_handshake *auth = &o->o_auth;
- return ceph_auth_sign_message(auth, msg);
- }
- static int osd_check_message_signature(struct ceph_msg *msg)
- {
- struct ceph_osd *o = msg->con->private;
- struct ceph_auth_handshake *auth = &o->o_auth;
- return ceph_auth_check_message_signature(auth, msg);
- }
- static const struct ceph_connection_operations osd_con_ops = {
- .get = get_osd_con,
- .put = put_osd_con,
- .dispatch = dispatch,
- .get_authorizer = get_authorizer,
- .add_authorizer_challenge = add_authorizer_challenge,
- .verify_authorizer_reply = verify_authorizer_reply,
- .invalidate_authorizer = invalidate_authorizer,
- .alloc_msg = alloc_msg,
- .sign_message = osd_sign_message,
- .check_message_signature = osd_check_message_signature,
- .fault = osd_fault,
- };
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