| |
| #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, |
| kref_read(&req->r_kref)); |
| 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, |
| kref_read(&req->r_kref)); |
| 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); |
| 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(kref_read(&req->r_kref) != 1); |
| request_release_checks(req); |
| |
| WARN_ON(kref_read(&request_msg->kref) != 1); |
| WARN_ON(kref_read(&reply_msg->kref) != 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); |
| 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) |
| { |
| WARN_ON(req->r_flags & (CEPH_OSD_FLAG_ACK | CEPH_OSD_FLAG_ONDISK)); |
| WARN_ON(!(req->r_flags & (CEPH_OSD_FLAG_READ | CEPH_OSD_FLAG_WRITE))); |
| |
| req->r_flags |= CEPH_OSD_FLAG_ONDISK; |
| atomic_inc(&req->r_osdc->num_requests); |
| |
| req->r_start_stamp = jiffies; |
| } |
| |
| 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 __complete_request(struct ceph_osd_request *req) |
| { |
| if (req->r_callback) { |
| dout("%s req %p tid %llu cb %pf result %d\n", __func__, req, |
| req->r_tid, req->r_callback, req->r_result); |
| req->r_callback(req); |
| } |
| } |
| |
| /* |
| * This is open-coded in handle_reply(). |
| */ |
| 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_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); |
| complete_all(&req->r_completion); |
| ceph_osdc_put_request(req); |
| } |
| |
| static void abort_request(struct ceph_osd_request *req, int err) |
| { |
| dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err); |
| |
| cancel_map_check(req); |
| complete_request(req, err); |
| } |
| |
| 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); |
| 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; |
| unsigned long expiry_cutoff = jiffies - opts->osd_request_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; ) { |
| struct ceph_osd_request *req = |
| rb_entry(p, struct ceph_osd_request, r_node); |
| |
| p = rb_next(p); /* abort_request() */ |
| |
| 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; |
| } |
| if (opts->osd_request_timeout && |
| time_before(req->r_start_stamp, expiry_cutoff)) { |
| pr_err_ratelimited("tid %llu on osd%d timeout\n", |
| req->r_tid, osd->o_osd); |
| abort_request(req, -ETIMEDOUT); |
| } |
| } |
| 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 (opts->osd_request_timeout) { |
| for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) { |
| struct ceph_osd_request *req = |
| rb_entry(p, struct ceph_osd_request, r_node); |
| |
| p = rb_next(p); /* abort_request() */ |
| |
| if (time_before(req->r_start_stamp, expiry_cutoff)) { |
| pr_err_ratelimited("tid %llu on osd%d timeout\n", |
| req->r_tid, osdc->homeless_osd.o_osd); |
| abort_request(req, -ETIMEDOUT); |
| } |
| } |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Handle MOSDOpReply. Set ->r_result and call the callback if it is |
| * specified. |
| */ |
| 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; |
| 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 result %d data_len %u\n", __func__, |
| req, req->r_tid, m.result, data_len); |
| |
| /* |
| * Since we only ever request ONDISK, we should only ever get |
| * one (type of) reply back. |
| */ |
| WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK)); |
| req->r_result = m.result ?: data_len; |
| finish_request(req); |
| mutex_unlock(&osd->lock); |
| up_read(&osdc->lock); |
| |
| __complete_request(req); |
| complete_all(&req->r_completion); |
| ceph_osdc_put_request(req); |
| 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: |
| * ->r_result isn't set and __complete_request() isn't called. |
| */ |
| 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); |
| } 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_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; |
| ktime_get_real_ts(&lreq->mtime); |
| |
| 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; |
| ktime_get_real_ts(&req->r_mtime); |
| 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: in/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; |
| |
| if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) |
| return -E2BIG; |
| |
| 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, |
| *resp_len, 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_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 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, |
| .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, |
| }; |