| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ilya Dryomov | 20917 | 68.95% | 130 | 40.12% |
| Sage Weil | 2570 | 8.47% | 52 | 16.05% |
| Alex Elder | 2221 | 7.32% | 64 | 19.75% |
| Jeff Layton | 1712 | 5.64% | 12 | 3.70% |
| Yehuda Sadeh Weinraub | 1031 | 3.40% | 14 | 4.32% |
| Yan Zheng | 711 | 2.34% | 19 | 5.86% |
| Douglas Fuller | 656 | 2.16% | 2 | 0.62% |
| Luis Henriques | 298 | 0.98% | 3 | 0.93% |
| David Disseldorp | 62 | 0.20% | 1 | 0.31% |
| Li Wang | 25 | 0.08% | 2 | 0.62% |
| Chengguang Xu | 19 | 0.06% | 2 | 0.62% |
| Tommi Virtanen | 18 | 0.06% | 1 | 0.31% |
| Xiubo Li | 14 | 0.05% | 1 | 0.31% |
| Josh Durgin | 13 | 0.04% | 3 | 0.93% |
| Dongsheng Yang | 12 | 0.04% | 1 | 0.31% |
| Wei Yongjun | 11 | 0.04% | 1 | 0.31% |
| Elena Reshetova | 8 | 0.03% | 1 | 0.31% |
| Deepa Dinamani | 6 | 0.02% | 1 | 0.31% |
| Dan Carpenter | 6 | 0.02% | 1 | 0.31% |
| Kees Cook | 4 | 0.01% | 1 | 0.31% |
| Jerry Lee | 4 | 0.01% | 1 | 0.31% |
| Gustavo A. R. Silva | 4 | 0.01% | 1 | 0.31% |
| Arnd Bergmann | 3 | 0.01% | 1 | 0.31% |
| Jason A. Donenfeld | 3 | 0.01% | 2 | 0.62% |
| Joe Perches | 3 | 0.01% | 2 | 0.62% |
| Tobias Klauser | 2 | 0.01% | 1 | 0.31% |
| Peter Zijlstra | 2 | 0.01% | 1 | 0.31% |
| Sakari Ailus | 1 | 0.00% | 1 | 0.31% |
| Greg Kroah-Hartman | 1 | 0.00% | 1 | 0.31% |
| Yanhu Cao | 1 | 0.00% | 1 | 0.31% |
| Total | 30338 | 324 |
// SPDX-License-Identifier: GPL-2.0 #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/ceph_features.h> #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> #include <linux/ceph/striper.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); static void clear_backoffs(struct ceph_osd *osd); #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; u32 xlen; /* object extent? */ ceph_calc_file_object_mapping(layout, off, orig_len, objnum, objoff, &xlen); *objlen = xlen; 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; } /* * Consumes @pages if @own_pages is true. */ 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; } /* * Consumes a ref on @pagelist. */ 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 ceph_bio_iter *bio_pos, u32 bio_length) { osd_data->type = CEPH_OSD_DATA_TYPE_BIO; osd_data->bio_pos = *bio_pos; osd_data->bio_length = bio_length; } #endif /* CONFIG_BLOCK */ static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data, struct ceph_bvec_iter *bvec_pos, u32 num_bvecs) { osd_data->type = CEPH_OSD_DATA_TYPE_BVECS; osd_data->bvec_pos = *bvec_pos; osd_data->num_bvecs = num_bvecs; } static void ceph_osd_iter_init(struct ceph_osd_data *osd_data, struct iov_iter *iter) { osd_data->type = CEPH_OSD_DATA_TYPE_ITER; osd_data->iter = *iter; } 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 ceph_bio_iter *bio_pos, u32 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_pos, bio_length); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); #endif /* CONFIG_BLOCK */ void osd_req_op_extent_osd_data_bvecs(struct ceph_osd_request *osd_req, unsigned int which, struct bio_vec *bvecs, u32 num_bvecs, u32 bytes) { struct ceph_osd_data *osd_data; struct ceph_bvec_iter it = { .bvecs = bvecs, .iter = { .bi_size = bytes }, }; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvecs); void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req, unsigned int which, struct ceph_bvec_iter *bvec_pos) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_data_bvecs_init(osd_data, bvec_pos, 0); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos); /** * osd_req_op_extent_osd_iter - Set up an operation with an iterator buffer * @osd_req: The request to set up * @which: Index of the operation in which to set the iter * @iter: The buffer iterator */ void osd_req_op_extent_osd_iter(struct ceph_osd_request *osd_req, unsigned int which, struct iov_iter *iter) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_iter_init(osd_data, iter); } EXPORT_SYMBOL(osd_req_op_extent_osd_iter); 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_request_data_bvecs(struct ceph_osd_request *osd_req, unsigned int which, struct bio_vec *bvecs, u32 num_bvecs, u32 bytes) { struct ceph_osd_data *osd_data; struct ceph_bvec_iter it = { .bvecs = bvecs, .iter = { .bi_size = bytes }, }; osd_data = osd_req_op_data(osd_req, which, cls, request_data); ceph_osd_data_bvecs_init(osd_data, &it, num_bvecs); osd_req->r_ops[which].cls.indata_len += bytes; osd_req->r_ops[which].indata_len += bytes; } EXPORT_SYMBOL(osd_req_op_cls_request_data_bvecs); 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 */ case CEPH_OSD_DATA_TYPE_BVECS: return osd_data->bvec_pos.iter.bi_size; case CEPH_OSD_DATA_TYPE_ITER: return iov_iter_count(&osd_data->iter); 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); } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { ceph_pagelist_release(osd_data->pagelist); } 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_SPARSE_READ: case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: kfree(op->extent.sparse_ext); 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; case CEPH_OSD_OP_COPY_FROM2: ceph_osd_data_release(&op->copy_from.osd_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->spgid = src->spgid; /* 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->recovery_deletes = src->recovery_deletes; dest->flags = src->flags; dest->used_replica = src->used_replica; dest->paused = src->paused; dest->epoch = src->epoch; dest->last_force_resend = src->last_force_resend; 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_private_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_private_item); target_init(&req->r_t); } 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(struct_size(req, r_ops, num_ops), 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(const struct ceph_object_locator *oloc) { return 8 + 4 + 4 + 4 + (oloc->pool_ns ? oloc->pool_ns->len : 0); } static int __ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp, int num_request_data_items, int num_reply_data_items) { struct ceph_osd_client *osdc = req->r_osdc; struct ceph_msg *msg; int msg_size; WARN_ON(req->r_request || req->r_reply); WARN_ON(ceph_oid_empty(&req->r_base_oid)); WARN_ON(ceph_oloc_empty(&req->r_base_oloc)); /* create request message */ msg_size = CEPH_ENCODING_START_BLK_LEN + CEPH_PGID_ENCODING_LEN + 1; /* spgid */ msg_size += 4 + 4 + 4; /* hash, osdmap_epoch, flags */ msg_size += CEPH_ENCODING_START_BLK_LEN + sizeof(struct ceph_osd_reqid); /* reqid */ msg_size += sizeof(struct ceph_blkin_trace_info); /* trace */ msg_size += 4 + sizeof(struct ceph_timespec); /* client_inc, mtime */ msg_size += CEPH_ENCODING_START_BLK_LEN + ceph_oloc_encoding_size(&req->r_base_oloc); /* oloc */ 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 + 8; /* retry_attempt, features */ if (req->r_mempool) msg = ceph_msgpool_get(&osdc->msgpool_op, msg_size, num_request_data_items); else msg = ceph_msg_new2(CEPH_MSG_OSD_OP, msg_size, num_request_data_items, 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, msg_size, num_reply_data_items); else msg = ceph_msg_new2(CEPH_MSG_OSD_OPREPLY, msg_size, num_reply_data_items, gfp, true); if (!msg) return -ENOMEM; req->r_reply = msg; return 0; } 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; } } static void get_num_data_items(struct ceph_osd_request *req, int *num_request_data_items, int *num_reply_data_items) { struct ceph_osd_req_op *op; *num_request_data_items = 0; *num_reply_data_items = 0; for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { switch (op->op) { /* request */ case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: case CEPH_OSD_OP_SETXATTR: case CEPH_OSD_OP_CMPXATTR: case CEPH_OSD_OP_NOTIFY_ACK: case CEPH_OSD_OP_COPY_FROM2: *num_request_data_items += 1; break; /* reply */ case CEPH_OSD_OP_STAT: case CEPH_OSD_OP_READ: case CEPH_OSD_OP_SPARSE_READ: case CEPH_OSD_OP_LIST_WATCHERS: *num_reply_data_items += 1; break; /* both */ case CEPH_OSD_OP_NOTIFY: *num_request_data_items += 1; *num_reply_data_items += 1; break; case CEPH_OSD_OP_CALL: *num_request_data_items += 2; *num_reply_data_items += 1; break; default: WARN_ON(!osd_req_opcode_valid(op->op)); break; } } } /* * oid, oloc and OSD op opcode(s) must be filled in before this function * is called. */ int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) { int num_request_data_items, num_reply_data_items; get_num_data_items(req, &num_request_data_items, &num_reply_data_items); return __ceph_osdc_alloc_messages(req, gfp, num_request_data_items, num_reply_data_items); } EXPORT_SYMBOL(ceph_osdc_alloc_messages); /* * 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. */ 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; } 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 && opcode != CEPH_OSD_OP_SPARSE_READ); 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); int osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, const char *class, const char *method) { struct ceph_osd_req_op *op; struct ceph_pagelist *pagelist; size_t payload_len = 0; size_t size; int ret; op = osd_req_op_init(osd_req, which, CEPH_OSD_OP_CALL, 0); pagelist = ceph_pagelist_alloc(GFP_NOFS); if (!pagelist) return -ENOMEM; op->cls.class_name = class; size = strlen(class); BUG_ON(size > (size_t) U8_MAX); op->cls.class_len = size; ret = ceph_pagelist_append(pagelist, class, size); if (ret) goto err_pagelist_free; payload_len += size; op->cls.method_name = method; size = strlen(method); BUG_ON(size > (size_t) U8_MAX); op->cls.method_len = size; ret = ceph_pagelist_append(pagelist, method, size); if (ret) goto err_pagelist_free; payload_len += size; osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); op->indata_len = payload_len; return 0; err_pagelist_free: ceph_pagelist_release(pagelist); return ret; } 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; int ret; BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); pagelist = ceph_pagelist_alloc(GFP_NOFS); if (!pagelist) return -ENOMEM; payload_len = strlen(name); op->xattr.name_len = payload_len; ret = ceph_pagelist_append(pagelist, name, payload_len); if (ret) goto err_pagelist_free; op->xattr.value_len = size; ret = ceph_pagelist_append(pagelist, value, size); if (ret) goto err_pagelist_free; 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; err_pagelist_free: ceph_pagelist_release(pagelist); return ret; } 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, u8 watch_opcode, u64 cookie, u32 gen) { 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 = gen; } /* * prot_ver, timeout and notify payload (may be empty) should already be * encoded in @request_pl */ static void osd_req_op_notify_init(struct ceph_osd_request *req, int which, u64 cookie, struct ceph_pagelist *request_pl) { struct ceph_osd_req_op *op; op = osd_req_op_init(req, which, CEPH_OSD_OP_NOTIFY, 0); op->notify.cookie = cookie; ceph_osd_data_pagelist_init(&op->notify.request_data, request_pl); op->indata_len = request_pl->length; } /* * @flags: CEPH_OSD_OP_ALLOC_HINT_FLAG_* */ void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, unsigned int which, u64 expected_object_size, u64 expected_write_size, u32 flags) { struct ceph_osd_req_op *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; op->alloc_hint.flags = flags; /* * 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, false); } 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_pos, length); #endif } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) { ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos); } else if (osd_data->type == CEPH_OSD_DATA_TYPE_ITER) { ceph_msg_data_add_iter(msg, &osd_data->iter); } 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) { switch (src->op) { case CEPH_OSD_OP_STAT: break; case CEPH_OSD_OP_READ: case CEPH_OSD_OP_SPARSE_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_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); dst->alloc_hint.flags = cpu_to_le32(src->alloc_hint.flags); 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; case CEPH_OSD_OP_COPY_FROM2: dst->copy_from.snapid = cpu_to_le64(src->copy_from.snapid); dst->copy_from.src_version = cpu_to_le64(src->copy_from.src_version); dst->copy_from.flags = src->copy_from.flags; dst->copy_from.src_fadvise_flags = cpu_to_le32(src->copy_from.src_fadvise_flags); break; case CEPH_OSD_OP_ASSERT_VER: dst->assert_ver.unused = cpu_to_le64(0); dst->assert_ver.ver = cpu_to_le64(src->assert_ver.ver); 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.) */ 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 && opcode != CEPH_OSD_OP_SPARSE_READ); 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_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_flags = flags | osdc->client->options->read_from_replica; req->r_snapid = vino.snap; if (flags & CEPH_OSD_FLAG_WRITE) req->r_data_offset = off; if (num_ops > 1) { int num_req_ops, num_rep_ops; /* * If this is a multi-op write request, assume that we'll need * request ops. If it's a multi-op read then assume we'll need * reply ops. Anything else and call it -EINVAL. */ if (flags & CEPH_OSD_FLAG_WRITE) { num_req_ops = num_ops; num_rep_ops = 0; } else if (flags & CEPH_OSD_FLAG_READ) { num_req_ops = 0; num_rep_ops = num_ops; } else { r = -EINVAL; goto fail; } r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_req_ops, num_rep_ops); } else { 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); int __ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt) { op->extent.sparse_ext_cnt = cnt; op->extent.sparse_ext = kmalloc_array(cnt, sizeof(*op->extent.sparse_ext), GFP_NOFS); if (!op->extent.sparse_ext) return -ENOMEM; return 0; } EXPORT_SYMBOL(__ceph_alloc_sparse_ext_map); /* * 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) /* * Call @fn on each OSD request as long as @fn returns 0. */ static void for_each_request(struct ceph_osd_client *osdc, int (*fn)(struct ceph_osd_request *req, void *arg), void *arg) { struct rb_node *n, *p; for (n = rb_first(&osdc->osds); n; n = rb_next(n)) { struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); 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); if (fn(req, arg)) return; } } 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); if (fn(req, arg)) return; } } 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) { refcount_set(&osd->o_ref, 1); RB_CLEAR_NODE(&osd->o_node); spin_lock_init(&osd->o_requests_lock); osd->o_requests = RB_ROOT; osd->o_linger_requests = RB_ROOT; osd->o_backoff_mappings = RB_ROOT; osd->o_backoffs_by_id = 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 ceph_init_sparse_read(struct ceph_sparse_read *sr) { kfree(sr->sr_extent); memset(sr, '\0', sizeof(*sr)); sr->sr_state = CEPH_SPARSE_READ_HDR; } 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(!RB_EMPTY_ROOT(&osd->o_backoff_mappings)); WARN_ON(!RB_EMPTY_ROOT(&osd->o_backoffs_by_id)); WARN_ON(!list_empty(&osd->o_osd_lru)); WARN_ON(!list_empty(&osd->o_keepalive_item)); ceph_init_sparse_read(&osd->o_sparse_read); 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; osd->o_sparse_op_idx = -1; ceph_init_sparse_read(&osd->o_sparse_read); 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 (refcount_inc_not_zero(&osd->o_ref)) { dout("get_osd %p %d -> %d\n", osd, refcount_read(&osd->o_ref)-1, refcount_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, refcount_read(&osd->o_ref), refcount_read(&osd->o_ref) - 1); if (refcount_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); } clear_backoffs(osd); __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); spin_lock(&osd->o_requests_lock); insert_request(&osd->o_requests, req); spin_unlock(&osd->o_requests_lock); 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; spin_lock(&osd->o_requests_lock); erase_request(&osd->o_requests, req); spin_unlock(&osd->o_requests_lock); 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->target_oloc.pool); return ((t->flags & CEPH_OSD_FLAG_READ) && pauserd) || ((t->flags & CEPH_OSD_FLAG_WRITE) && pausewr) || (osdc->osdmap->epoch < osdc->epoch_barrier); } static int pick_random_replica(const struct ceph_osds *acting) { int i = get_random_u32_below(acting->size); dout("%s picked osd%d, primary osd%d\n", __func__, acting->osds[i], acting->primary); return i; } /* * Picks the closest replica based on client's location given by * crush_location option. Prefers the primary if the locality is * the same. */ static int pick_closest_replica(struct ceph_osd_client *osdc, const struct ceph_osds *acting) { struct ceph_options *opt = osdc->client->options; int best_i, best_locality; int i = 0, locality; do { locality = ceph_get_crush_locality(osdc->osdmap, acting->osds[i], &opt->crush_locs); if (i == 0 || (locality >= 0 && best_locality < 0) || (locality >= 0 && best_locality >= 0 && locality < best_locality)) { best_i = i; best_locality = locality; } } while (++i < acting->size); dout("%s picked osd%d with locality %d, primary osd%d\n", __func__, acting->osds[best_i], best_locality, acting->primary); return best_i; } 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, bool any_change) { struct ceph_pg_pool_info *pi; struct ceph_pg pgid, last_pgid; struct ceph_osds up, acting; bool is_read = t->flags & CEPH_OSD_FLAG_READ; bool is_write = t->flags & CEPH_OSD_FLAG_WRITE; bool force_resend = false; bool unpaused = false; bool legacy_change = false; bool split = false; bool sort_bitwise = ceph_osdmap_flag(osdc, CEPH_OSDMAP_SORTBITWISE); bool recovery_deletes = ceph_osdmap_flag(osdc, CEPH_OSDMAP_RECOVERY_DELETES); enum calc_target_result ct_res; t->epoch = osdc->osdmap->epoch; 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 (t->last_force_resend < pi->last_force_request_resend) { t->last_force_resend = pi->last_force_request_resend; force_resend = true; } else if (t->last_force_resend == 0) { force_resend = true; } } /* apply tiering */ ceph_oid_copy(&t->target_oid, &t->base_oid); ceph_oloc_copy(&t->target_oloc, &t->base_oloc); if ((t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { if (is_read && pi->read_tier >= 0) t->target_oloc.pool = pi->read_tier; if (is_write && pi->write_tier >= 0) t->target_oloc.pool = pi->write_tier; pi = ceph_pg_pool_by_id(osdc->osdmap, t->target_oloc.pool); if (!pi) { t->osd = CEPH_HOMELESS_OSD; ct_res = CALC_TARGET_POOL_DNE; goto out; } } __ceph_object_locator_to_pg(pi, &t->target_oid, &t->target_oloc, &pgid); 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, pi, &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, t->recovery_deletes, recovery_deletes, &last_pgid)) force_resend = true; if (t->paused && !target_should_be_paused(osdc, t, pi)) { t->paused = false; unpaused = true; } legacy_change = ceph_pg_compare(&t->pgid, &pgid) || ceph_osds_changed(&t->acting, &acting, t->used_replica || any_change); if (t->pg_num) split = ceph_pg_is_split(&last_pgid, t->pg_num, pi->pg_num); if (legacy_change || force_resend || split) { t->pgid = pgid; /* struct */ ceph_pg_to_primary_shard(osdc->osdmap, pi, &pgid, &t->spgid); 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->recovery_deletes = recovery_deletes; if ((t->flags & (CEPH_OSD_FLAG_BALANCE_READS | CEPH_OSD_FLAG_LOCALIZE_READS)) && !is_write && pi->type == CEPH_POOL_TYPE_REP && acting.size > 1) { int pos; WARN_ON(!is_read || acting.osds[0] != acting.primary); if (t->flags & CEPH_OSD_FLAG_BALANCE_READS) { pos = pick_random_replica(&acting); } else { pos = pick_closest_replica(osdc, &acting); } t->osd = acting.osds[pos]; t->used_replica = pos > 0; } else { t->osd = acting.primary; t->used_replica = false; } } if (unpaused || legacy_change || force_resend || split) ct_res = CALC_TARGET_NEED_RESEND; else ct_res = CALC_TARGET_NO_ACTION; out: dout("%s t %p -> %d%d%d%d ct_res %d osd%d\n", __func__, t, unpaused, legacy_change, force_resend, split, ct_res, t->osd); return ct_res; } static struct ceph_spg_mapping *alloc_spg_mapping(void) { struct ceph_spg_mapping *spg; spg = kmalloc(sizeof(*spg), GFP_NOIO); if (!spg) return NULL; RB_CLEAR_NODE(&spg->node); spg->backoffs = RB_ROOT; return spg; } static void free_spg_mapping(struct ceph_spg_mapping *spg) { WARN_ON(!RB_EMPTY_NODE(&spg->node)); WARN_ON(!RB_EMPTY_ROOT(&spg->backoffs)); kfree(spg); } /* * rbtree of ceph_spg_mapping for handling map<spg_t, ...>, similar to * ceph_pg_mapping. Used to track OSD backoffs -- a backoff [range] is * defined only within a specific spgid; it does not pass anything to * children on split, or to another primary. */ DEFINE_RB_FUNCS2(spg_mapping, struct ceph_spg_mapping, spgid, ceph_spg_compare, RB_BYPTR, const struct ceph_spg *, node) static u64 hoid_get_bitwise_key(const struct ceph_hobject_id *hoid) { return hoid->is_max ? 0x100000000ull : hoid->hash_reverse_bits; } static void hoid_get_effective_key(const struct ceph_hobject_id *hoid, void **pkey, size_t *pkey_len) { if (hoid->key_len) { *pkey = hoid->key; *pkey_len = hoid->key_len; } else { *pkey = hoid->oid; *pkey_len = hoid->oid_len; } } static int compare_names(const void *name1, size_t name1_len, const void *name2, size_t name2_len) { int ret; ret = memcmp(name1, name2, min(name1_len, name2_len)); if (!ret) { if (name1_len < name2_len) ret = -1; else if (name1_len > name2_len) ret = 1; } return ret; } static int hoid_compare(const struct ceph_hobject_id *lhs, const struct ceph_hobject_id *rhs) { void *effective_key1, *effective_key2; size_t effective_key1_len, effective_key2_len; int ret; if (lhs->is_max < rhs->is_max) return -1; if (lhs->is_max > rhs->is_max) return 1; if (lhs->pool < rhs->pool) return -1; if (lhs->pool > rhs->pool) return 1; if (hoid_get_bitwise_key(lhs) < hoid_get_bitwise_key(rhs)) return -1; if (hoid_get_bitwise_key(lhs) > hoid_get_bitwise_key(rhs)) return 1; ret = compare_names(lhs->nspace, lhs->nspace_len, rhs->nspace, rhs->nspace_len); if (ret) return ret; hoid_get_effective_key(lhs, &effective_key1, &effective_key1_len); hoid_get_effective_key(rhs, &effective_key2, &effective_key2_len); ret = compare_names(effective_key1, effective_key1_len, effective_key2, effective_key2_len); if (ret) return ret; ret = compare_names(lhs->oid, lhs->oid_len, rhs->oid, rhs->oid_len); if (ret) return ret; if (lhs->snapid < rhs->snapid) return -1; if (lhs->snapid > rhs->snapid) return 1; return 0; } /* * For decoding ->begin and ->end of MOSDBackoff only -- no MIN/MAX * compat stuff here. * * Assumes @hoid is zero-initialized. */ static int decode_hoid(void **p, void *end, struct ceph_hobject_id *hoid) { u8 struct_v; u32 struct_len; int ret; ret = ceph_start_decoding(p, end, 4, "hobject_t", &struct_v, &struct_len); if (ret) return ret; if (struct_v < 4) { pr_err("got struct_v %d < 4 of hobject_t\n", struct_v); goto e_inval; } hoid->key = ceph_extract_encoded_string(p, end, &hoid->key_len, GFP_NOIO); if (IS_ERR(hoid->key)) { ret = PTR_ERR(hoid->key); hoid->key = NULL; return ret; } hoid->oid = ceph_extract_encoded_string(p, end, &hoid->oid_len, GFP_NOIO); if (IS_ERR(hoid->oid)) { ret = PTR_ERR(hoid->oid); hoid->oid = NULL; return ret; } ceph_decode_64_safe(p, end, hoid->snapid, e_inval); ceph_decode_32_safe(p, end, hoid->hash, e_inval); ceph_decode_8_safe(p, end, hoid->is_max, e_inval); hoid->nspace = ceph_extract_encoded_string(p, end, &hoid->nspace_len, GFP_NOIO); if (IS_ERR(hoid->nspace)) { ret = PTR_ERR(hoid->nspace); hoid->nspace = NULL; return ret; } ceph_decode_64_safe(p, end, hoid->pool, e_inval); ceph_hoid_build_hash_cache(hoid); return 0; e_inval: return -EINVAL; } static int hoid_encoding_size(const struct ceph_hobject_id *hoid) { return 8 + 4 + 1 + 8 + /* snapid, hash, is_max, pool */ 4 + hoid->key_len + 4 + hoid->oid_len + 4 + hoid->nspace_len; } static void encode_hoid(void **p, void *end, const struct ceph_hobject_id *hoid) { ceph_start_encoding(p, 4, 3, hoid_encoding_size(hoid)); ceph_encode_string(p, end, hoid->key, hoid->key_len); ceph_encode_string(p, end, hoid->oid, hoid->oid_len); ceph_encode_64(p, hoid->snapid); ceph_encode_32(p, hoid->hash); ceph_encode_8(p, hoid->is_max); ceph_encode_string(p, end, hoid->nspace, hoid->nspace_len); ceph_encode_64(p, hoid->pool); } static void free_hoid(struct ceph_hobject_id *hoid) { if (hoid) { kfree(hoid->key); kfree(hoid->oid); kfree(hoid->nspace); kfree(hoid); } } static struct ceph_osd_backoff *alloc_backoff(void) { struct ceph_osd_backoff *backoff; backoff = kzalloc(sizeof(*backoff), GFP_NOIO); if (!backoff) return NULL; RB_CLEAR_NODE(&backoff->spg_node); RB_CLEAR_NODE(&backoff->id_node); return backoff; } static void free_backoff(struct ceph_osd_backoff *backoff) { WARN_ON(!RB_EMPTY_NODE(&backoff->spg_node)); WARN_ON(!RB_EMPTY_NODE(&backoff->id_node)); free_hoid(backoff->begin); free_hoid(backoff->end); kfree(backoff); } /* * Within a specific spgid, backoffs are managed by ->begin hoid. */ DEFINE_RB_INSDEL_FUNCS2(backoff, struct ceph_osd_backoff, begin, hoid_compare, RB_BYVAL, spg_node); static struct ceph_osd_backoff *lookup_containing_backoff(struct rb_root *root, const struct ceph_hobject_id *hoid) { struct rb_node *n = root->rb_node; while (n) { struct ceph_osd_backoff *cur = rb_entry(n, struct ceph_osd_backoff, spg_node); int cmp; cmp = hoid_compare(hoid, cur->begin); if (cmp < 0) { n = n->rb_left; } else if (cmp > 0) { if (hoid_compare(hoid, cur->end) < 0) return cur; n = n->rb_right; } else { return cur; } } return NULL; } /* * Each backoff has a unique id within its OSD session. */ DEFINE_RB_FUNCS(backoff_by_id, struct ceph_osd_backoff, id, id_node) static void clear_backoffs(struct ceph_osd *osd) { while (!RB_EMPTY_ROOT(&osd->o_backoff_mappings)) { struct ceph_spg_mapping *spg = rb_entry(rb_first(&osd->o_backoff_mappings), struct ceph_spg_mapping, node); while (!RB_EMPTY_ROOT(&spg->backoffs)) { struct ceph_osd_backoff *backoff = rb_entry(rb_first(&spg->backoffs), struct ceph_osd_backoff, spg_node); erase_backoff(&spg->backoffs, backoff); erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); free_backoff(backoff); } erase_spg_mapping(&osd->o_backoff_mappings, spg); free_spg_mapping(spg); } } /* * Set up a temporary, non-owning view into @t. */ static void hoid_fill_from_target(struct ceph_hobject_id *hoid, const struct ceph_osd_request_target *t) { hoid->key = NULL; hoid->key_len = 0; hoid->oid = t->target_oid.name; hoid->oid_len = t->target_oid.name_len; hoid->snapid = CEPH_NOSNAP; hoid->hash = t->pgid.seed; hoid->is_max = false; if (t->target_oloc.pool_ns) { hoid->nspace = t->target_oloc.pool_ns->str; hoid->nspace_len = t->target_oloc.pool_ns->len; } else { hoid->nspace = NULL; hoid->nspace_len = 0; } hoid->pool = t->target_oloc.pool; ceph_hoid_build_hash_cache(hoid); } static bool should_plug_request(struct ceph_osd_request *req) { struct ceph_osd *osd = req->r_osd; struct ceph_spg_mapping *spg; struct ceph_osd_backoff *backoff; struct ceph_hobject_id hoid; spg = lookup_spg_mapping(&osd->o_backoff_mappings, &req->r_t.spgid); if (!spg) return false; hoid_fill_from_target(&hoid, &req->r_t); backoff = lookup_containing_backoff(&spg->backoffs, &hoid); if (!backoff) return false; dout("%s req %p tid %llu backoff osd%d spgid %llu.%xs%d id %llu\n", __func__, req, req->r_tid, osd->o_osd, backoff->spgid.pgid.pool, backoff->spgid.pgid.seed, backoff->spgid.shard, backoff->id); return true; } /* * Keep get_num_data_items() in sync with this function. */ static void setup_request_data(struct ceph_osd_request *req) { struct ceph_msg *request_msg = req->r_request; struct ceph_msg *reply_msg = req->r_reply; struct ceph_osd_req_op *op; if (req->r_request->num_data_items || req->r_reply->num_data_items) return; WARN_ON(request_msg->data_length || reply_msg->data_length); for (op = req->r_ops; op != &req->r_ops[req->r_num_ops]; op++) { 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(request_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(request_msg, &op->xattr.osd_data); break; case CEPH_OSD_OP_NOTIFY_ACK: ceph_osdc_msg_data_add(request_msg, &op->notify_ack.request_data); break; case CEPH_OSD_OP_COPY_FROM2: ceph_osdc_msg_data_add(request_msg, &op->copy_from.osd_data); break; /* reply */ case CEPH_OSD_OP_STAT: ceph_osdc_msg_data_add(reply_msg, &op->raw_data_in); break; case CEPH_OSD_OP_READ: case CEPH_OSD_OP_SPARSE_READ: ceph_osdc_msg_data_add(reply_msg, &op->extent.osd_data); break; case CEPH_OSD_OP_LIST_WATCHERS: ceph_osdc_msg_data_add(reply_msg, &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(request_msg, &op->cls.request_info); /* optional, can be NONE */ ceph_osdc_msg_data_add(request_msg, &op->cls.request_data); /* optional, can be NONE */ ceph_osdc_msg_data_add(reply_msg, &op->cls.response_data); break; case CEPH_OSD_OP_NOTIFY: ceph_osdc_msg_data_add(request_msg, &op->notify.request_data); ceph_osdc_msg_data_add(reply_msg, &op->notify.response_data); break; } } } static void encode_pgid(void **p, const struct ceph_pg *pgid) { ceph_encode_8(p, 1); ceph_encode_64(p, pgid->pool); ceph_encode_32(p, pgid->seed); ceph_encode_32(p, -1); /* preferred */ } static void encode_spgid(void **p, const struct ceph_spg *spgid) { ceph_start_encoding(p, 1, 1, CEPH_PGID_ENCODING_LEN + 1); encode_pgid(p, &spgid->pgid); ceph_encode_8(p, spgid->shard); } static void encode_oloc(void **p, void *end, const struct ceph_object_locator *oloc) { ceph_start_encoding(p, 5, 4, ceph_oloc_encoding_size(oloc)); ceph_encode_64(p, oloc->pool); ceph_encode_32(p, -1); /* preferred */ ceph_encode_32(p, 0); /* key len */ if (oloc->pool_ns) ceph_encode_string(p, end, oloc->pool_ns->str, oloc->pool_ns->len); else ceph_encode_32(p, 0); } static void encode_request_partial(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); encode_spgid(&p, &req->r_t.spgid); /* actual spg */ ceph_encode_32(&p, req->r_t.pgid.seed); /* raw hash */ ceph_encode_32(&p, req->r_osdc->osdmap->epoch); ceph_encode_32(&p, req->r_flags); /* reqid */ ceph_start_encoding(&p, 2, 2, sizeof(struct ceph_osd_reqid)); memset(p, 0, sizeof(struct ceph_osd_reqid)); p += sizeof(struct ceph_osd_reqid); /* trace */ memset(p, 0, sizeof(struct ceph_blkin_trace_info)); p += sizeof(struct ceph_blkin_trace_info); ceph_encode_32(&p, 0); /* client_inc, always 0 */ ceph_encode_timespec64(p, &req->r_mtime); p += sizeof(struct ceph_timespec); encode_oloc(&p, end, &req->r_t.target_oloc); ceph_encode_string(&p, end, req->r_t.target_oid.name, 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 - 8); /* space for features */ msg->hdr.version = cpu_to_le16(8); /* MOSDOp v8 */ /* front_len is finalized in encode_request_finish() */ msg->front.iov_len = p - msg->front.iov_base; 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 msg %p oid %s oid_len %d\n", __func__, req, msg, req->r_t.target_oid.name, req->r_t.target_oid.name_len); } static void encode_request_finish(struct ceph_msg *msg) { void *p = msg->front.iov_base; void *const partial_end = p + msg->front.iov_len; void *const end = p + msg->front_alloc_len; if (CEPH_HAVE_FEATURE(msg->con->peer_features, RESEND_ON_SPLIT)) { /* luminous OSD -- encode features and be done */ p = partial_end; ceph_encode_64(&p, msg->con->peer_features); } else { struct { char spgid[CEPH_ENCODING_START_BLK_LEN + CEPH_PGID_ENCODING_LEN + 1]; __le32 hash; __le32 epoch; __le32 flags; char reqid[CEPH_ENCODING_START_BLK_LEN + sizeof(struct ceph_osd_reqid)]; char trace[sizeof(struct ceph_blkin_trace_info)]; __le32 client_inc; struct ceph_timespec mtime; } __packed head; struct ceph_pg pgid; void *oloc, *oid, *tail; int oloc_len, oid_len, tail_len; int len; /* * Pre-luminous OSD -- reencode v8 into v4 using @head * as a temporary buffer. Encode the raw PG; the rest * is just a matter of moving oloc, oid and tail blobs * around. */ memcpy(&head, p, sizeof(head)); p += sizeof(head); oloc = p; p += CEPH_ENCODING_START_BLK_LEN; pgid.pool = ceph_decode_64(&p); p += 4 + 4; /* preferred, key len */ len = ceph_decode_32(&p); p += len; /* nspace */ oloc_len = p - oloc; oid = p; len = ceph_decode_32(&p); p += len; oid_len = p - oid; tail = p; tail_len = partial_end - p; p = msg->front.iov_base; ceph_encode_copy(&p, &head.client_inc, sizeof(head.client_inc)); ceph_encode_copy(&p, &head.epoch, sizeof(head.epoch)); ceph_encode_copy(&p, &head.flags, sizeof(head.flags)); ceph_encode_copy(&p, &head.mtime, sizeof(head.mtime)); /* reassert_version */ memset(p, 0, sizeof(struct ceph_eversion)); p += sizeof(struct ceph_eversion); BUG_ON(p >= oloc); memmove(p, oloc, oloc_len); p += oloc_len; pgid.seed = le32_to_cpu(head.hash); encode_pgid(&p, &pgid); /* raw pg */ BUG_ON(p >= oid); memmove(p, oid, oid_len); p += oid_len; /* tail -- ops, snapid, snapc, retry_attempt */ BUG_ON(p >= tail); memmove(p, tail, tail_len); p += tail_len; msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ } BUG_ON(p > end); msg->front.iov_len = p - msg->front.iov_base; msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); dout("%s msg %p tid %llu %u+%u+%u v%d\n", __func__, msg, le64_to_cpu(msg->hdr.tid), le32_to_cpu(msg->hdr.front_len), le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len), le16_to_cpu(msg->hdr.version)); } /* * @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); /* backoff? */ if (should_plug_request(req)) return; /* * 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_partial(req, req->r_request); dout("%s req %p tid %llu to pgid %llu.%x spgid %llu.%xs%d osd%d e%u flags 0x%x attempt %d\n", __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.spgid.pgid.pool, req->r_t.spgid.pgid.seed, req->r_t.spgid.shard, osd->o_osd, req->r_t.epoch, 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 complete_request(struct ceph_osd_request *req, int err); 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; int err = 0; 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, 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 (osdc->abort_err) { dout("req %p abort_err %d\n", req, osdc->abort_err); err = osdc->abort_err; } else if (osdc->osdmap->epoch < osdc->epoch_barrier) { dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch, osdc->epoch_barrier); req->r_t.paused = true; maybe_request_map(osdc); } else 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); if (ceph_test_opt(osdc->client, ABORT_ON_FULL)) { err = -ENOSPC; } else { if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL)) pr_warn_ratelimited("cluster is full (osdmap FULL)\n"); else pr_warn_ratelimited("pool %lld is full or reached quota\n", req->r_t.base_oloc.pool); 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); else if (err) complete_request(req, err); mutex_unlock(&osd->lock); if (!err && 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; req->r_start_latency = ktime_get(); } 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; WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid)); dout("%s req %p tid %llu\n", __func__, req, req->r_tid); req->r_end_latency = ktime_get(); if (req->r_osd) { ceph_init_sparse_read(&req->r_osd->o_sparse_read); unlink_request(req->r_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) { dout("%s req %p tid %llu cb %ps result %d\n", __func__, req, req->r_tid, req->r_callback, req->r_result); if (req->r_callback) req->r_callback(req); complete_all(&req->r_completion); ceph_osdc_put_request(req); } static void complete_request_workfn(struct work_struct *work) { struct ceph_osd_request *req = container_of(work, struct ceph_osd_request, r_complete_work); __complete_request(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); INIT_WORK(&req->r_complete_work, complete_request_workfn); queue_work(req->r_osdc->completion_wq, &req->r_complete_work); } 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 int abort_fn(struct ceph_osd_request *req, void *arg) { int err = *(int *)arg; abort_request(req, err); return 0; /* continue iteration */ } /* * Abort all in-flight requests with @err and arrange for all future * requests to be failed immediately. */ void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err) { dout("%s osdc %p err %d\n", __func__, osdc, err); down_write(&osdc->lock); for_each_request(osdc, abort_fn, &err); osdc->abort_err = err; up_write(&osdc->lock); } EXPORT_SYMBOL(ceph_osdc_abort_requests); void ceph_osdc_clear_abort_err(struct ceph_osd_client *osdc) { down_write(&osdc->lock); osdc->abort_err = 0; up_write(&osdc->lock); } EXPORT_SYMBOL(ceph_osdc_clear_abort_err); static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) { if (likely(eb > osdc->epoch_barrier)) { dout("updating epoch_barrier from %u to %u\n", osdc->epoch_barrier, eb); osdc->epoch_barrier = eb; /* Request map if we're not to the barrier yet */ if (eb > osdc->osdmap->epoch) maybe_request_map(osdc); } } void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb) { down_read(&osdc->lock); if (unlikely(eb > osdc->epoch_barrier)) { up_read(&osdc->lock); down_write(&osdc->lock); update_epoch_barrier(osdc, eb); up_write(&osdc->lock); } else { up_read(&osdc->lock); } } EXPORT_SYMBOL(ceph_osdc_update_epoch_barrier); /* * We can end up releasing caps as a result of abort_request(). * In that case, we probably want to ensure that the cap release message * has an updated epoch barrier in it, so set the epoch barrier prior to * aborting the first request. */ static int abort_on_full_fn(struct ceph_osd_request *req, void *arg) { struct ceph_osd_client *osdc = req->r_osdc; bool *victims = arg; if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || pool_full(osdc, req->r_t.base_oloc.pool))) { if (!*victims) { update_epoch_barrier(osdc, osdc->osdmap->epoch); *victims = true; } abort_request(req, -ENOSPC); } return 0; /* continue iteration */ } /* * Drop all pending requests that are stalled waiting on a full condition to * clear, and complete them with ENOSPC as the return code. Set the * osdc->epoch_barrier to the latest map epoch that we've seen if any were * cancelled. */ static void ceph_osdc_abort_on_full(struct ceph_osd_client *osdc) { bool victims = false; if (ceph_test_opt(osdc->client, ABORT_ON_FULL) && (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) || have_pool_full(osdc))) for_each_request(osdc, abort_on_full_fn, &victims); } 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->request_pl) ceph_pagelist_release(lreq->request_pl); if (lreq->notify_id_pages) ceph_release_page_vector(lreq->notify_id_pages, 1); ceph_osdc_put_request(lreq->reg_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); if (req != lreq->reg_req) { dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", __func__, lreq, lreq->linger_id, req, lreq->reg_req); goto out; } 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); } } out: 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); if (req != lreq->reg_req) { dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", __func__, lreq, lreq->linger_id, req, lreq->reg_req); goto out; } 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); } } out: mutex_unlock(&lreq->lock); linger_put(lreq); } static void send_linger(struct ceph_osd_linger_request *lreq) { struct ceph_osd_client *osdc = lreq->osdc; struct ceph_osd_request *req; int ret; verify_osdc_wrlocked(osdc); mutex_lock(&lreq->lock); dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); if (lreq->reg_req) { if (lreq->reg_req->r_osd) cancel_linger_request(lreq->reg_req); ceph_osdc_put_request(lreq->reg_req); } req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); BUG_ON(!req); target_copy(&req->r_t, &lreq->t); req->r_mtime = lreq->mtime; if (lreq->is_watch && lreq->committed) { osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_RECONNECT, lreq->linger_id, ++lreq->register_gen); dout("lreq %p reconnect register_gen %u\n", lreq, req->r_ops[0].watch.gen); req->r_callback = linger_reconnect_cb; } else { if (lreq->is_watch) { osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_WATCH, lreq->linger_id, 0); } else { lreq->notify_id = 0; refcount_inc(&lreq->request_pl->refcnt); osd_req_op_notify_init(req, 0, lreq->linger_id, lreq->request_pl); ceph_osd_data_pages_init( osd_req_op_data(req, 0, notify, response_data), lreq->notify_id_pages, PAGE_SIZE, 0, false, false); } dout("lreq %p register\n", lreq); req->r_callback = linger_commit_cb; } ret = ceph_osdc_alloc_messages(req, GFP_NOIO); BUG_ON(ret); req->r_priv = linger_get(lreq); req->r_linger = true; lreq->reg_req = req; mutex_unlock(&lreq->lock); 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); if (req != lreq->ping_req) { dout("%s lreq %p linger_id %llu unknown req (%p != %p)\n", __func__, lreq, lreq->linger_id, req, lreq->ping_req); goto out; } 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); } out: 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; int ret; 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 (lreq->ping_req) { if (lreq->ping_req->r_osd) cancel_linger_request(lreq->ping_req); ceph_osdc_put_request(lreq->ping_req); } req = ceph_osdc_alloc_request(osdc, NULL, 1, true, GFP_NOIO); BUG_ON(!req); target_copy(&req->r_t, &lreq->t); osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_PING, lreq->linger_id, lreq->register_gen); req->r_callback = linger_ping_cb; ret = ceph_osdc_alloc_messages(req, GFP_NOIO); BUG_ON(ret); req->r_priv = linger_get(lreq); req->r_linger = true; lreq->ping_req = req; 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; down_write(&osdc->lock); linger_register(lreq); calc_target(osdc, &lreq->t, false); osd = lookup_create_osd(osdc, lreq->t.osd, true); link_linger(osd, lreq); send_linger(lreq); up_write(&osdc->lock); } 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->ping_req && lreq->ping_req->r_osd) cancel_linger_request(lreq->ping_req); if (lreq->reg_req && 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_killable(&lreq->reg_commit_wait); return ret ?: lreq->reg_commit_error; } static int linger_notify_finish_wait(struct ceph_osd_linger_request *lreq, unsigned long timeout) { long left; dout("%s lreq %p linger_id %llu\n", __func__, lreq, lreq->linger_id); left = wait_for_completion_killable_timeout(&lreq->notify_finish_wait, ceph_timeout_jiffies(timeout)); if (left <= 0) left = left ?: -ETIMEDOUT; else left = lreq->notify_finish_error; /* completed */ return left; } /* * 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; } /* 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 | CEPH_OSD_FLAG_IGNORE_OVERLAY | CEPH_OSD_FLAG_IGNORE_CACHE; req->r_tid = 0; __submit_request(req, false); goto out_unlock_osdc; } if (m.result == -EAGAIN) { dout("req %p tid %llu EAGAIN\n", req, req->r_tid); unlink_request(osd, req); mutex_unlock(&osd->lock); /* * The object is missing on the replica or not (yet) * readable. Clear pgid to force a resend to the primary * via legacy_change. */ req->r_t.pgid.pool = 0; req->r_t.pgid.seed = 0; WARN_ON(!req->r_t.used_replica); req->r_flags &= ~(CEPH_OSD_FLAG_BALANCE_READS | CEPH_OSD_FLAG_LOCALIZE_READS); 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_version = m.user_version; req->r_result = m.result ?: data_len; finish_request(req); mutex_unlock(&osd->lock); up_read(&osdc->lock); __complete_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, 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; fallthrough; 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: list_del_init(&lreq->scan_item); 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, 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; fallthrough; 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, ceph_msgr2(osdc->client), osdc->osdmap); else newmap = ceph_osdmap_decode(&p, end, ceph_msgr2(osdc->client)); 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; enum calc_target_result ct_res; struct rb_node *n; /* make sure need_resend targets reflect latest map */ for (n = rb_first(need_resend); n; ) { struct ceph_osd_request *req = rb_entry(n, struct ceph_osd_request, r_node); n = rb_next(n); if (req->r_t.epoch < osdc->osdmap->epoch) { ct_res = calc_target(osdc, &req->r_t, false); if (ct_res == CALC_TARGET_POOL_DNE) { erase_request(need_resend, req); check_pool_dne(req); } } } 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() */ 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 || osdc->osdmap->epoch < osdc->epoch_barrier) maybe_request_map(osdc); kick_requests(osdc, &need_resend, &need_resend_linger); ceph_osdc_abort_on_full(osdc); 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; clear_backoffs(osd); 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); } struct MOSDBackoff { struct ceph_spg spgid; u32 map_epoch; u8 op; u64 id; struct ceph_hobject_id *begin; struct ceph_hobject_id *end; }; static int decode_MOSDBackoff(const struct ceph_msg *msg, struct MOSDBackoff *m) { void *p = msg->front.iov_base; void *const end = p + msg->front.iov_len; u8 struct_v; u32 struct_len; int ret; ret = ceph_start_decoding(&p, end, 1, "spg_t", &struct_v, &struct_len); if (ret) return ret; ret = ceph_decode_pgid(&p, end, &m->spgid.pgid); if (ret) return ret; ceph_decode_8_safe(&p, end, m->spgid.shard, e_inval); ceph_decode_32_safe(&p, end, m->map_epoch, e_inval); ceph_decode_8_safe(&p, end, m->op, e_inval); ceph_decode_64_safe(&p, end, m->id, e_inval); m->begin = kzalloc(sizeof(*m->begin), GFP_NOIO); if (!m->begin) return -ENOMEM; ret = decode_hoid(&p, end, m->begin); if (ret) { free_hoid(m->begin); return ret; } m->end = kzalloc(sizeof(*m->end), GFP_NOIO); if (!m->end) { free_hoid(m->begin); return -ENOMEM; } ret = decode_hoid(&p, end, m->end); if (ret) { free_hoid(m->begin); free_hoid(m->end); return ret; } return 0; e_inval: return -EINVAL; } static struct ceph_msg *create_backoff_message( const struct ceph_osd_backoff *backoff, u32 map_epoch) { struct ceph_msg *msg; void *p, *end; int msg_size; msg_size = CEPH_ENCODING_START_BLK_LEN + CEPH_PGID_ENCODING_LEN + 1; /* spgid */ msg_size += 4 + 1 + 8; /* map_epoch, op, id */ msg_size += CEPH_ENCODING_START_BLK_LEN + hoid_encoding_size(backoff->begin); msg_size += CEPH_ENCODING_START_BLK_LEN + hoid_encoding_size(backoff->end); msg = ceph_msg_new(CEPH_MSG_OSD_BACKOFF, msg_size, GFP_NOIO, true); if (!msg) return NULL; p = msg->front.iov_base; end = p + msg->front_alloc_len; encode_spgid(&p, &backoff->spgid); ceph_encode_32(&p, map_epoch); ceph_encode_8(&p, CEPH_OSD_BACKOFF_OP_ACK_BLOCK); ceph_encode_64(&p, backoff->id); encode_hoid(&p, end, backoff->begin); encode_hoid(&p, end, backoff->end); BUG_ON(p != end); msg->front.iov_len = p - msg->front.iov_base; msg->hdr.version = cpu_to_le16(1); /* MOSDBackoff v1 */ msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); return msg; } static void handle_backoff_block(struct ceph_osd *osd, struct MOSDBackoff *m) { struct ceph_spg_mapping *spg; struct ceph_osd_backoff *backoff; struct ceph_msg *msg; dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); spg = lookup_spg_mapping(&osd->o_backoff_mappings, &m->spgid); if (!spg) { spg = alloc_spg_mapping(); if (!spg) { pr_err("%s failed to allocate spg\n", __func__); return; } spg->spgid = m->spgid; /* struct */ insert_spg_mapping(&osd->o_backoff_mappings, spg); } backoff = alloc_backoff(); if (!backoff) { pr_err("%s failed to allocate backoff\n", __func__); return; } backoff->spgid = m->spgid; /* struct */ backoff->id = m->id; backoff->begin = m->begin; m->begin = NULL; /* backoff now owns this */ backoff->end = m->end; m->end = NULL; /* ditto */ insert_backoff(&spg->backoffs, backoff); insert_backoff_by_id(&osd->o_backoffs_by_id, backoff); /* * Ack with original backoff's epoch so that the OSD can * discard this if there was a PG split. */ msg = create_backoff_message(backoff, m->map_epoch); if (!msg) { pr_err("%s failed to allocate msg\n", __func__); return; } ceph_con_send(&osd->o_con, msg); } static bool target_contained_by(const struct ceph_osd_request_target *t, const struct ceph_hobject_id *begin, const struct ceph_hobject_id *end) { struct ceph_hobject_id hoid; int cmp; hoid_fill_from_target(&hoid, t); cmp = hoid_compare(&hoid, begin); return !cmp || (cmp > 0 && hoid_compare(&hoid, end) < 0); } static void handle_backoff_unblock(struct ceph_osd *osd, const struct MOSDBackoff *m) { struct ceph_spg_mapping *spg; struct ceph_osd_backoff *backoff; struct rb_node *n; dout("%s osd%d spgid %llu.%xs%d id %llu\n", __func__, osd->o_osd, m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); backoff = lookup_backoff_by_id(&osd->o_backoffs_by_id, m->id); if (!backoff) { pr_err("%s osd%d spgid %llu.%xs%d id %llu backoff dne\n", __func__, osd->o_osd, m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); return; } if (hoid_compare(backoff->begin, m->begin) && hoid_compare(backoff->end, m->end)) { pr_err("%s osd%d spgid %llu.%xs%d id %llu bad range?\n", __func__, osd->o_osd, m->spgid.pgid.pool, m->spgid.pgid.seed, m->spgid.shard, m->id); /* unblock it anyway... */ } spg = lookup_spg_mapping(&osd->o_backoff_mappings, &backoff->spgid); BUG_ON(!spg); erase_backoff(&spg->backoffs, backoff); erase_backoff_by_id(&osd->o_backoffs_by_id, backoff); free_backoff(backoff); if (RB_EMPTY_ROOT(&spg->backoffs)) { erase_spg_mapping(&osd->o_backoff_mappings, spg); free_spg_mapping(spg); } 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); if (!ceph_spg_compare(&req->r_t.spgid, &m->spgid)) { /* * Match against @m, not @backoff -- the PG may * have split on the OSD. */ if (target_contained_by(&req->r_t, m->begin, m->end)) { /* * If no other installed backoff applies, * resend. */ send_request(req); } } } } static void handle_backoff(struct ceph_osd *osd, struct ceph_msg *msg) { struct ceph_osd_client *osdc = osd->o_osdc; struct MOSDBackoff m; int ret; down_read(&osdc->lock); if (!osd_registered(osd)) { dout("%s osd%d unknown\n", __func__, osd->o_osd); up_read(&osdc->lock); return; } WARN_ON(osd->o_osd != le64_to_cpu(msg->hdr.src.num)); mutex_lock(&osd->lock); ret = decode_MOSDBackoff(msg, &m); if (ret) { pr_err("failed to decode MOSDBackoff: %d\n", ret); ceph_msg_dump(msg); goto out_unlock; } switch (m.op) { case CEPH_OSD_BACKOFF_OP_BLOCK: handle_backoff_block(osd, &m); break; case CEPH_OSD_BACKOFF_OP_UNBLOCK: handle_backoff_unblock(osd, &m); break; default: pr_err("%s osd%d unknown op %d\n", __func__, osd->o_osd, m.op); } free_hoid(m.begin); free_hoid(m.end); out_unlock: mutex_unlock(&osd->lock); up_read(&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 = msg->num_data_items ? &msg->data[0] : NULL; if (data) { if (lreq->preply_pages) { WARN_ON(data->type != CEPH_MSG_DATA_PAGES); *lreq->preply_pages = data->pages; *lreq->preply_len = data->length; data->own_pages = false; } } 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. */ void ceph_osdc_start_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { down_read(&osdc->lock); submit_request(req, false); up_read(&osdc->lock); } EXPORT_SYMBOL(ceph_osdc_start_request); /* * Unregister request. If @req was registered, it isn't completed: * r_result isn't set and __complete_request() isn't invoked. * * If @req wasn't registered, this call may have raced with * handle_reply(), in which case r_result would already be set and * __complete_request() would be getting invoked, possibly even * concurrently with this call. */ 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); /* * 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_ts64(&lreq->mtime); linger_submit(lreq); 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_ts64(&req->r_mtime); osd_req_op_watch_init(req, 0, CEPH_OSD_WATCH_OP_UNWATCH, lreq->linger_id, 0); ret = ceph_osdc_alloc_messages(req, GFP_NOIO); if (ret) goto out_put_req; ceph_osdc_start_request(osdc, req); 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, u32 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 = ceph_pagelist_alloc(GFP_NOIO); if (!pl) return -ENOMEM; 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, u32 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 = osd_req_op_notify_ack_init(req, 0, notify_id, cookie, payload, payload_len); if (ret) goto out_put_req; ret = ceph_osdc_alloc_messages(req, GFP_NOIO); if (ret) goto out_put_req; ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); out_put_req: ceph_osdc_put_request(req); return ret; } EXPORT_SYMBOL(ceph_osdc_notify_ack); /* * @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, u32 payload_len, u32 timeout, struct page ***preply_pages, size_t *preply_len) { struct ceph_osd_linger_request *lreq; int ret; WARN_ON(!timeout); if (preply_pages) { *preply_pages = NULL; *preply_len = 0; } lreq = linger_alloc(osdc); if (!lreq) return -ENOMEM; lreq->request_pl = ceph_pagelist_alloc(GFP_NOIO); if (!lreq->request_pl) { ret = -ENOMEM; goto out_put_lreq; } ret = ceph_pagelist_encode_32(lreq->request_pl, 1); /* prot_ver */ ret |= ceph_pagelist_encode_32(lreq->request_pl, timeout); ret |= ceph_pagelist_encode_32(lreq->request_pl, payload_len); ret |= ceph_pagelist_append(lreq->request_pl, payload, payload_len); if (ret) { ret = -ENOMEM; goto out_put_lreq; } /* for notify_id */ lreq->notify_id_pages = ceph_alloc_page_vector(1, GFP_NOIO); if (IS_ERR(lreq->notify_id_pages)) { ret = PTR_ERR(lreq->notify_id_pages); lreq->notify_id_pages = NULL; goto out_put_lreq; } 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; linger_submit(lreq); ret = linger_reg_commit_wait(lreq); if (!ret) ret = linger_notify_finish_wait(lreq, msecs_to_jiffies(2 * timeout * MSEC_PER_SEC)); 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) goto bad; ret = -EINVAL; ceph_decode_copy_safe(p, end, &item->name, sizeof(item->name), bad); ceph_decode_64_safe(p, end, item->cookie, bad); ceph_decode_skip_32(p, end, bad); /* skip timeout seconds */ if (struct_v >= 2) { ret = ceph_decode_entity_addr(p, end, &item->addr); if (ret) goto bad; } else { ret = 0; } dout("%s %s%llu cookie %llu addr %s\n", __func__, ENTITY_NAME(item->name), item->cookie, ceph_pr_addr(&item->addr)); bad: return ret; } 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; 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); ret = ceph_osdc_alloc_messages(req, GFP_NOIO); if (ret) goto out_put_req; ceph_osdc_start_request(osdc, req); 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_pages, size_t *resp_len) { struct ceph_osd_request *req; int ret; if (req_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 = osd_req_op_cls_init(req, 0, class, method); if (ret) goto out_put_req; if (req_page) osd_req_op_cls_request_data_pages(req, 0, &req_page, req_len, 0, false, false); if (resp_pages) osd_req_op_cls_response_data_pages(req, 0, resp_pages, *resp_len, 0, false, false); ret = ceph_osdc_alloc_messages(req, GFP_NOIO); if (ret) goto out_put_req; ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); if (ret >= 0) { ret = req->r_ops[0].rval; if (resp_pages) *resp_len = req->r_ops[0].outdata_len; } out_put_req: ceph_osdc_put_request(req); return ret; } EXPORT_SYMBOL(ceph_osdc_call); /* * reset all osd connections */ void ceph_osdc_reopen_osds(struct ceph_osd_client *osdc) { struct rb_node *n; down_write(&osdc->lock); for (n = rb_first(&osdc->osds); n; ) { struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node); n = rb_next(n); if (!reopen_osd(osd)) kick_osd_requests(osd); } up_write(&osdc->lock); } /* * 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, CEPH_OSD_SLAB_OPS, 10, "osd_op"); if (err < 0) goto out_mempool; err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, PAGE_SIZE, CEPH_OSD_SLAB_OPS, 10, "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; osdc->completion_wq = create_singlethread_workqueue("ceph-completion"); if (!osdc->completion_wq) goto out_notify_wq; 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_notify_wq: destroy_workqueue(osdc->notify_wq); 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) { destroy_workqueue(osdc->completion_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(refcount_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); } int osd_req_op_copy_from_init(struct ceph_osd_request *req, u64 src_snapid, u64 src_version, struct ceph_object_id *src_oid, struct ceph_object_locator *src_oloc, u32 src_fadvise_flags, u32 dst_fadvise_flags, u32 truncate_seq, u64 truncate_size, u8 copy_from_flags) { struct ceph_osd_req_op *op; struct page **pages; void *p, *end; pages = ceph_alloc_page_vector(1, GFP_KERNEL); if (IS_ERR(pages)) return PTR_ERR(pages); op = osd_req_op_init(req, 0, CEPH_OSD_OP_COPY_FROM2, dst_fadvise_flags); op->copy_from.snapid = src_snapid; op->copy_from.src_version = src_version; op->copy_from.flags = copy_from_flags; op->copy_from.src_fadvise_flags = src_fadvise_flags; p = page_address(pages[0]); end = p + PAGE_SIZE; ceph_encode_string(&p, end, src_oid->name, src_oid->name_len); encode_oloc(&p, end, src_oloc); ceph_encode_32(&p, truncate_seq); ceph_encode_64(&p, truncate_size); op->indata_len = PAGE_SIZE - (end - p); ceph_osd_data_pages_init(&op->copy_from.osd_data, pages, op->indata_len, 0, false, true); return 0; } EXPORT_SYMBOL(osd_req_op_copy_from_init); int __init 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; } void ceph_osdc_cleanup(void) { BUG_ON(!ceph_osd_request_cache); kmem_cache_destroy(ceph_osd_request_cache); ceph_osd_request_cache = NULL; } /* * handle incoming message */ static void osd_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_OSD_BACKOFF: handle_backoff(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); } /* How much sparse data was requested? */ static u64 sparse_data_requested(struct ceph_osd_request *req) { u64 len = 0; if (req->r_flags & CEPH_OSD_FLAG_READ) { int i; for (i = 0; i < req->r_num_ops; ++i) { struct ceph_osd_req_op *op = &req->r_ops[i]; if (op->op == CEPH_OSD_OP_SPARSE_READ) len += op->extent.length; } } return len; } /* * 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); u64 srlen; 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; } srlen = sparse_data_requested(req); if (!srlen && 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); m->sparse_read = (bool)srlen; 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; } 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_new2(type, front_len, 1, GFP_NOIO, false); if (!m) return NULL; if (data_len) { struct page **pages; pages = ceph_alloc_page_vector(calc_pages_for(0, data_len), GFP_NOIO); if (IS_ERR(pages)) { ceph_msg_put(m); return NULL; } ceph_msg_data_add_pages(m, pages, data_len, 0, true); } return m; } static struct ceph_msg *osd_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_OSD_BACKOFF: 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 *osd_get_con(struct ceph_connection *con) { struct ceph_osd *osd = con->private; if (get_osd(osd)) return con; return NULL; } static void osd_put_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 * osd_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; int ret; ret = __ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, force_new, proto, NULL, NULL); if (ret) return ERR_PTR(ret); return auth; } static int osd_add_authorizer_challenge(struct ceph_connection *con, void *challenge_buf, int challenge_buf_len) { struct ceph_osd *o = con->private; struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; return ceph_auth_add_authorizer_challenge(ac, o->o_auth.authorizer, challenge_buf, challenge_buf_len); } static int osd_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; struct ceph_auth_handshake *auth = &o->o_auth; return ceph_auth_verify_authorizer_reply(ac, auth->authorizer, auth->authorizer_reply_buf, auth->authorizer_reply_buf_len, NULL, NULL, NULL, NULL); } static int osd_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_get_auth_request(struct ceph_connection *con, void *buf, int *buf_len, void **authorizer, int *authorizer_len) { struct ceph_osd *o = con->private; struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; struct ceph_auth_handshake *auth = &o->o_auth; int ret; ret = ceph_auth_get_authorizer(ac, auth, CEPH_ENTITY_TYPE_OSD, buf, buf_len); if (ret) return ret; *authorizer = auth->authorizer_buf; *authorizer_len = auth->authorizer_buf_len; return 0; } static int osd_handle_auth_reply_more(struct ceph_connection *con, void *reply, int reply_len, void *buf, int *buf_len, void **authorizer, int *authorizer_len) { struct ceph_osd *o = con->private; struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; struct ceph_auth_handshake *auth = &o->o_auth; int ret; ret = ceph_auth_handle_svc_reply_more(ac, auth, reply, reply_len, buf, buf_len); if (ret) return ret; *authorizer = auth->authorizer_buf; *authorizer_len = auth->authorizer_buf_len; return 0; } static int osd_handle_auth_done(struct ceph_connection *con, u64 global_id, void *reply, int reply_len, u8 *session_key, int *session_key_len, u8 *con_secret, int *con_secret_len) { struct ceph_osd *o = con->private; struct ceph_auth_client *ac = o->o_osdc->client->monc.auth; struct ceph_auth_handshake *auth = &o->o_auth; return ceph_auth_handle_svc_reply_done(ac, auth, reply, reply_len, session_key, session_key_len, con_secret, con_secret_len); } static int osd_handle_auth_bad_method(struct ceph_connection *con, int used_proto, int result, const int *allowed_protos, int proto_cnt, const int *allowed_modes, int mode_cnt) { struct ceph_osd *o = con->private; struct ceph_mon_client *monc = &o->o_osdc->client->monc; int ret; if (ceph_auth_handle_bad_authorizer(monc->auth, CEPH_ENTITY_TYPE_OSD, used_proto, result, allowed_protos, proto_cnt, allowed_modes, mode_cnt)) { ret = ceph_monc_validate_auth(monc); if (ret) return ret; } return -EACCES; } static void osd_reencode_message(struct ceph_msg *msg) { int type = le16_to_cpu(msg->hdr.type); if (type == CEPH_MSG_OSD_OP) encode_request_finish(msg); } 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 void advance_cursor(struct ceph_msg_data_cursor *cursor, size_t len, bool zero) { while (len) { struct page *page; size_t poff, plen; page = ceph_msg_data_next(cursor, &poff, &plen); if (plen > len) plen = len; if (zero) zero_user_segment(page, poff, poff + plen); len -= plen; ceph_msg_data_advance(cursor, plen); } } static int prep_next_sparse_read(struct ceph_connection *con, struct ceph_msg_data_cursor *cursor) { struct ceph_osd *o = con->private; struct ceph_sparse_read *sr = &o->o_sparse_read; struct ceph_osd_request *req; struct ceph_osd_req_op *op; spin_lock(&o->o_requests_lock); req = lookup_request(&o->o_requests, le64_to_cpu(con->in_msg->hdr.tid)); if (!req) { spin_unlock(&o->o_requests_lock); return -EBADR; } if (o->o_sparse_op_idx < 0) { u64 srlen = sparse_data_requested(req); dout("%s: [%d] starting new sparse read req. srlen=0x%llx\n", __func__, o->o_osd, srlen); ceph_msg_data_cursor_init(cursor, con->in_msg, srlen); } else { u64 end; op = &req->r_ops[o->o_sparse_op_idx]; WARN_ON_ONCE(op->extent.sparse_ext); /* hand back buffer we took earlier */ op->extent.sparse_ext = sr->sr_extent; sr->sr_extent = NULL; op->extent.sparse_ext_cnt = sr->sr_count; sr->sr_ext_len = 0; dout("%s: [%d] completed extent array len %d cursor->resid %zd\n", __func__, o->o_osd, op->extent.sparse_ext_cnt, cursor->resid); /* Advance to end of data for this operation */ end = ceph_sparse_ext_map_end(op); if (end < sr->sr_req_len) advance_cursor(cursor, sr->sr_req_len - end, false); } ceph_init_sparse_read(sr); /* find next op in this request (if any) */ while (++o->o_sparse_op_idx < req->r_num_ops) { op = &req->r_ops[o->o_sparse_op_idx]; if (op->op == CEPH_OSD_OP_SPARSE_READ) goto found; } /* reset for next sparse read request */ spin_unlock(&o->o_requests_lock); o->o_sparse_op_idx = -1; return 0; found: sr->sr_req_off = op->extent.offset; sr->sr_req_len = op->extent.length; sr->sr_pos = sr->sr_req_off; dout("%s: [%d] new sparse read op at idx %d 0x%llx~0x%llx\n", __func__, o->o_osd, o->o_sparse_op_idx, sr->sr_req_off, sr->sr_req_len); /* hand off request's sparse extent map buffer */ sr->sr_ext_len = op->extent.sparse_ext_cnt; op->extent.sparse_ext_cnt = 0; sr->sr_extent = op->extent.sparse_ext; op->extent.sparse_ext = NULL; spin_unlock(&o->o_requests_lock); return 1; } #ifdef __BIG_ENDIAN static inline void convert_extent_map(struct ceph_sparse_read *sr) { int i; for (i = 0; i < sr->sr_count; i++) { struct ceph_sparse_extent *ext = &sr->sr_extent[i]; ext->off = le64_to_cpu((__force __le64)ext->off); ext->len = le64_to_cpu((__force __le64)ext->len); } } #else static inline void convert_extent_map(struct ceph_sparse_read *sr) { } #endif #define MAX_EXTENTS 4096 static int osd_sparse_read(struct ceph_connection *con, struct ceph_msg_data_cursor *cursor, char **pbuf) { struct ceph_osd *o = con->private; struct ceph_sparse_read *sr = &o->o_sparse_read; u32 count = sr->sr_count; u64 eoff, elen; int ret; switch (sr->sr_state) { case CEPH_SPARSE_READ_HDR: next_op: ret = prep_next_sparse_read(con, cursor); if (ret <= 0) return ret; /* number of extents */ ret = sizeof(sr->sr_count); *pbuf = (char *)&sr->sr_count; sr->sr_state = CEPH_SPARSE_READ_EXTENTS; break; case CEPH_SPARSE_READ_EXTENTS: /* Convert sr_count to host-endian */ count = le32_to_cpu((__force __le32)sr->sr_count); sr->sr_count = count; dout("[%d] got %u extents\n", o->o_osd, count); if (count > 0) { if (!sr->sr_extent || count > sr->sr_ext_len) { /* * Apply a hard cap to the number of extents. * If we have more, assume something is wrong. */ if (count > MAX_EXTENTS) { dout("%s: OSD returned 0x%x extents in a single reply!\n", __func__, count); return -EREMOTEIO; } /* no extent array provided, or too short */ kfree(sr->sr_extent); sr->sr_extent = kmalloc_array(count, sizeof(*sr->sr_extent), GFP_NOIO); if (!sr->sr_extent) return -ENOMEM; sr->sr_ext_len = count; } ret = count * sizeof(*sr->sr_extent); *pbuf = (char *)sr->sr_extent; sr->sr_state = CEPH_SPARSE_READ_DATA_LEN; break; } /* No extents? Read data len */ fallthrough; case CEPH_SPARSE_READ_DATA_LEN: convert_extent_map(sr); ret = sizeof(sr->sr_datalen); *pbuf = (char *)&sr->sr_datalen; sr->sr_state = CEPH_SPARSE_READ_DATA; break; case CEPH_SPARSE_READ_DATA: if (sr->sr_index >= count) { sr->sr_state = CEPH_SPARSE_READ_HDR; goto next_op; } eoff = sr->sr_extent[sr->sr_index].off; elen = sr->sr_extent[sr->sr_index].len; dout("[%d] ext %d off 0x%llx len 0x%llx\n", o->o_osd, sr->sr_index, eoff, elen); if (elen > INT_MAX) { dout("Sparse read extent length too long (0x%llx)\n", elen); return -EREMOTEIO; } /* zero out anything from sr_pos to start of extent */ if (sr->sr_pos < eoff) advance_cursor(cursor, eoff - sr->sr_pos, true); /* Set position to end of extent */ sr->sr_pos = eoff + elen; /* send back the new length and nullify the ptr */ cursor->sr_resid = elen; ret = elen; *pbuf = NULL; /* Bump the array index */ ++sr->sr_index; break; } return ret; } static const struct ceph_connection_operations osd_con_ops = { .get = osd_get_con, .put = osd_put_con, .sparse_read = osd_sparse_read, .alloc_msg = osd_alloc_msg, .dispatch = osd_dispatch, .fault = osd_fault, .reencode_message = osd_reencode_message, .get_authorizer = osd_get_authorizer, .add_authorizer_challenge = osd_add_authorizer_challenge, .verify_authorizer_reply = osd_verify_authorizer_reply, .invalidate_authorizer = osd_invalidate_authorizer, .sign_message = osd_sign_message, .check_message_signature = osd_check_message_signature, .get_auth_request = osd_get_auth_request, .handle_auth_reply_more = osd_handle_auth_reply_more, .handle_auth_done = osd_handle_auth_done, .handle_auth_bad_method = osd_handle_auth_bad_method, };
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