#include #include #include #include #include #include #include #include #ifdef CONFIG_BLOCK #include #endif #include #include #include #include #include #include #define OSD_OPREPLY_FRONT_LEN 512 static struct kmem_cache *ceph_osd_request_cache; static const struct ceph_connection_operations osd_con_ops; static void __send_queued(struct ceph_osd_client *osdc); static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd); static void __register_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req); static void __unregister_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req); static void __unregister_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req); static void __enqueue_request(struct ceph_osd_request *req); /* * Implement client access to distributed object storage cluster. * * All data objects are stored within a cluster/cloud of OSDs, or * "object storage devices." (Note that Ceph OSDs have _nothing_ to * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply * remote daemons serving up and coordinating consistent and safe * access to storage. * * Cluster membership and the mapping of data objects onto storage devices * are described by the osd map. * * We keep track of pending OSD requests (read, write), resubmit * requests to different OSDs when the cluster topology/data layout * change, or retry the affected requests when the communications * channel with an OSD is reset. */ /* * calculate the mapping of a file extent onto an object, and fill out the * request accordingly. shorten extent as necessary if it crosses an * object boundary. * * fill osd op in request message. */ static int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen, u64 *objnum, u64 *objoff, u64 *objlen) { u64 orig_len = *plen; int r; /* object extent? */ r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum, objoff, objlen); if (r < 0) return r; if (*objlen < orig_len) { *plen = *objlen; dout(" skipping last %llu, final file extent %llu~%llu\n", orig_len - *plen, off, *plen); } dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen); return 0; } static void ceph_osd_data_init(struct ceph_osd_data *osd_data) { memset(osd_data, 0, sizeof (*osd_data)); osd_data->type = CEPH_OSD_DATA_TYPE_NONE; } static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) { osd_data->type = CEPH_OSD_DATA_TYPE_PAGES; osd_data->pages = pages; osd_data->length = length; osd_data->alignment = alignment; osd_data->pages_from_pool = pages_from_pool; osd_data->own_pages = own_pages; } static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data, struct ceph_pagelist *pagelist) { osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST; osd_data->pagelist = pagelist; } #ifdef CONFIG_BLOCK static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data, struct bio *bio, size_t bio_length) { osd_data->type = CEPH_OSD_DATA_TYPE_BIO; osd_data->bio = bio; osd_data->bio_length = bio_length; } #endif /* CONFIG_BLOCK */ #define osd_req_op_data(oreq, whch, typ, fld) \ ({ \ struct ceph_osd_request *__oreq = (oreq); \ unsigned int __whch = (whch); \ BUG_ON(__whch >= __oreq->r_num_ops); \ &__oreq->r_ops[__whch].typ.fld; \ }) static struct ceph_osd_data * osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which) { BUG_ON(which >= osd_req->r_num_ops); return &osd_req->r_ops[which].raw_data_in; } struct ceph_osd_data * osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req, unsigned int which) { return osd_req_op_data(osd_req, which, extent, osd_data); } EXPORT_SYMBOL(osd_req_op_extent_osd_data); void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_raw_data_in(osd_req, which); ceph_osd_data_pages_init(osd_data, pages, length, alignment, pages_from_pool, own_pages); } EXPORT_SYMBOL(osd_req_op_raw_data_in_pages); void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_data_pages_init(osd_data, pages, length, alignment, pages_from_pool, own_pages); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages); void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req, unsigned int which, struct ceph_pagelist *pagelist) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_data_pagelist_init(osd_data, pagelist); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist); #ifdef CONFIG_BLOCK void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req, unsigned int which, struct bio *bio, size_t bio_length) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, extent, osd_data); ceph_osd_data_bio_init(osd_data, bio, bio_length); } EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio); #endif /* CONFIG_BLOCK */ static void osd_req_op_cls_request_info_pagelist( struct ceph_osd_request *osd_req, unsigned int which, struct ceph_pagelist *pagelist) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, cls, request_info); ceph_osd_data_pagelist_init(osd_data, pagelist); } void osd_req_op_cls_request_data_pagelist( struct ceph_osd_request *osd_req, unsigned int which, struct ceph_pagelist *pagelist) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, cls, request_data); ceph_osd_data_pagelist_init(osd_data, pagelist); osd_req->r_ops[which].cls.indata_len += pagelist->length; osd_req->r_ops[which].indata_len += pagelist->length; } EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist); void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, cls, request_data); ceph_osd_data_pages_init(osd_data, pages, length, alignment, pages_from_pool, own_pages); osd_req->r_ops[which].cls.indata_len += length; osd_req->r_ops[which].indata_len += length; } EXPORT_SYMBOL(osd_req_op_cls_request_data_pages); void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req, unsigned int which, struct page **pages, u64 length, u32 alignment, bool pages_from_pool, bool own_pages) { struct ceph_osd_data *osd_data; osd_data = osd_req_op_data(osd_req, which, cls, response_data); ceph_osd_data_pages_init(osd_data, pages, length, alignment, pages_from_pool, own_pages); } EXPORT_SYMBOL(osd_req_op_cls_response_data_pages); static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data) { switch (osd_data->type) { case CEPH_OSD_DATA_TYPE_NONE: return 0; case CEPH_OSD_DATA_TYPE_PAGES: return osd_data->length; case CEPH_OSD_DATA_TYPE_PAGELIST: return (u64)osd_data->pagelist->length; #ifdef CONFIG_BLOCK case CEPH_OSD_DATA_TYPE_BIO: return (u64)osd_data->bio_length; #endif /* CONFIG_BLOCK */ default: WARN(true, "unrecognized data type %d\n", (int)osd_data->type); return 0; } } static void ceph_osd_data_release(struct ceph_osd_data *osd_data) { if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) { int num_pages; num_pages = calc_pages_for((u64)osd_data->alignment, (u64)osd_data->length); ceph_release_page_vector(osd_data->pages, num_pages); } ceph_osd_data_init(osd_data); } static void osd_req_op_data_release(struct ceph_osd_request *osd_req, unsigned int which) { struct ceph_osd_req_op *op; BUG_ON(which >= osd_req->r_num_ops); op = &osd_req->r_ops[which]; switch (op->op) { case CEPH_OSD_OP_READ: case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: ceph_osd_data_release(&op->extent.osd_data); break; case CEPH_OSD_OP_CALL: ceph_osd_data_release(&op->cls.request_info); ceph_osd_data_release(&op->cls.request_data); ceph_osd_data_release(&op->cls.response_data); break; case CEPH_OSD_OP_SETXATTR: case CEPH_OSD_OP_CMPXATTR: ceph_osd_data_release(&op->xattr.osd_data); break; case CEPH_OSD_OP_STAT: ceph_osd_data_release(&op->raw_data_in); break; 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_destroy(struct ceph_osd_request_target *t) { ceph_oid_destroy(&t->base_oid); ceph_oid_destroy(&t->target_oid); } /* * requests */ 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); WARN_ON(!RB_EMPTY_NODE(&req->r_node)); WARN_ON(!list_empty(&req->r_req_lru_item)); WARN_ON(!list_empty(&req->r_osd_item)); WARN_ON(!list_empty(&req->r_linger_item)); WARN_ON(!list_empty(&req->r_linger_osd_item)); WARN_ON(req->r_osd); if (req->r_request) ceph_msg_put(req->r_request); if (req->r_reply) { ceph_msg_revoke_incoming(req->r_reply); ceph_msg_put(req->r_reply); } for (which = 0; which < req->r_num_ops; which++) osd_req_op_data_release(req, which); target_destroy(&req->r_t); ceph_put_snap_context(req->r_snapc); if (req->r_mempool) mempool_free(req, req->r_osdc->req_mempool); else if (req->r_num_ops <= CEPH_OSD_SLAB_OPS) kmem_cache_free(ceph_osd_request_cache, req); else kfree(req); } void ceph_osdc_get_request(struct ceph_osd_request *req) { dout("%s %p (was %d)\n", __func__, req, atomic_read(&req->r_kref.refcount)); kref_get(&req->r_kref); } EXPORT_SYMBOL(ceph_osdc_get_request); void ceph_osdc_put_request(struct ceph_osd_request *req) { if (req) { dout("%s %p (was %d)\n", __func__, req, atomic_read(&req->r_kref.refcount)); kref_put(&req->r_kref, ceph_osdc_release_request); } } EXPORT_SYMBOL(ceph_osdc_put_request); struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, struct ceph_snap_context *snapc, unsigned int num_ops, bool use_mempool, gfp_t gfp_flags) { struct ceph_osd_request *req; if (use_mempool) { BUG_ON(num_ops > CEPH_OSD_SLAB_OPS); req = mempool_alloc(osdc->req_mempool, gfp_flags); } else if (num_ops <= CEPH_OSD_SLAB_OPS) { req = kmem_cache_alloc(ceph_osd_request_cache, gfp_flags); } else { BUG_ON(num_ops > CEPH_OSD_MAX_OPS); req = kmalloc(sizeof(*req) + num_ops * sizeof(req->r_ops[0]), gfp_flags); } if (unlikely(!req)) return NULL; /* req only, each op is zeroed in _osd_req_op_init() */ memset(req, 0, sizeof(*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); kref_init(&req->r_kref); init_completion(&req->r_completion); init_completion(&req->r_safe_completion); RB_CLEAR_NODE(&req->r_node); INIT_LIST_HEAD(&req->r_unsafe_item); INIT_LIST_HEAD(&req->r_linger_item); INIT_LIST_HEAD(&req->r_linger_osd_item); INIT_LIST_HEAD(&req->r_req_lru_item); INIT_LIST_HEAD(&req->r_osd_item); target_init(&req->r_t); dout("%s req %p\n", __func__, req); return req; } EXPORT_SYMBOL(ceph_osdc_alloc_request); int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp) { struct ceph_osd_client *osdc = req->r_osdc; struct ceph_msg *msg; int msg_size; WARN_ON(ceph_oid_empty(&req->r_base_oid)); /* create request message */ msg_size = 4 + 4 + 4; /* client_inc, osdmap_epoch, flags */ msg_size += 4 + 4 + 4 + 8; /* mtime, reassert_version */ msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ msg_size += 1 + 8 + 4 + 4; /* pgid */ msg_size += 4 + req->r_base_oid.name_len; /* oid */ msg_size += 2 + req->r_num_ops * sizeof(struct ceph_osd_op); msg_size += 8; /* snapid */ msg_size += 8; /* snap_seq */ msg_size += 4 + 8 * (req->r_snapc ? req->r_snapc->num_snaps : 0); msg_size += 4; /* retry_attempt */ if (req->r_mempool) msg = ceph_msgpool_get(&osdc->msgpool_op, 0); else msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp, true); if (!msg) return -ENOMEM; memset(msg->front.iov_base, 0, msg->front.iov_len); req->r_request = msg; /* create reply message */ msg_size = OSD_OPREPLY_FRONT_LEN; msg_size += req->r_base_oid.name_len; msg_size += req->r_num_ops * sizeof(struct ceph_osd_op); if (req->r_mempool) msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); else msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, msg_size, gfp, true); if (!msg) return -ENOMEM; req->r_reply = msg; return 0; } EXPORT_SYMBOL(ceph_osdc_alloc_messages); static bool osd_req_opcode_valid(u16 opcode) { switch (opcode) { #define GENERATE_CASE(op, opcode, str) case CEPH_OSD_OP_##op: return true; __CEPH_FORALL_OSD_OPS(GENERATE_CASE) #undef GENERATE_CASE default: return false; } } /* * This is an osd op init function for opcodes that have no data or * other information associated with them. It also serves as a * common init routine for all the other init functions, below. */ static struct ceph_osd_req_op * _osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u32 flags) { struct ceph_osd_req_op *op; BUG_ON(which >= osd_req->r_num_ops); BUG_ON(!osd_req_opcode_valid(opcode)); op = &osd_req->r_ops[which]; memset(op, 0, sizeof (*op)); op->op = opcode; op->flags = flags; return op; } void osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u32 flags) { (void)_osd_req_op_init(osd_req, which, opcode, flags); } EXPORT_SYMBOL(osd_req_op_init); void osd_req_op_extent_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u64 offset, u64 length, u64 truncate_size, u32 truncate_seq) { struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode, 0); size_t payload_len = 0; BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); op->extent.offset = offset; op->extent.length = length; op->extent.truncate_size = truncate_size; op->extent.truncate_seq = truncate_seq; if (opcode == CEPH_OSD_OP_WRITE || opcode == CEPH_OSD_OP_WRITEFULL) payload_len += length; op->indata_len = payload_len; } EXPORT_SYMBOL(osd_req_op_extent_init); void osd_req_op_extent_update(struct ceph_osd_request *osd_req, unsigned int which, u64 length) { struct ceph_osd_req_op *op; u64 previous; BUG_ON(which >= osd_req->r_num_ops); op = &osd_req->r_ops[which]; previous = op->extent.length; if (length == previous) return; /* Nothing to do */ BUG_ON(length > previous); op->extent.length = length; op->indata_len -= previous - length; } EXPORT_SYMBOL(osd_req_op_extent_update); void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req, unsigned int which, u64 offset_inc) { struct ceph_osd_req_op *op, *prev_op; BUG_ON(which + 1 >= osd_req->r_num_ops); prev_op = &osd_req->r_ops[which]; op = _osd_req_op_init(osd_req, which + 1, prev_op->op, prev_op->flags); /* dup previous one */ op->indata_len = prev_op->indata_len; op->outdata_len = prev_op->outdata_len; op->extent = prev_op->extent; /* adjust offset */ op->extent.offset += offset_inc; op->extent.length -= offset_inc; if (op->op == CEPH_OSD_OP_WRITE || op->op == CEPH_OSD_OP_WRITEFULL) op->indata_len -= offset_inc; } EXPORT_SYMBOL(osd_req_op_extent_dup_last); void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, const char *class, const char *method) { struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode, 0); struct ceph_pagelist *pagelist; size_t payload_len = 0; size_t size; BUG_ON(opcode != CEPH_OSD_OP_CALL); pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS); BUG_ON(!pagelist); ceph_pagelist_init(pagelist); op->cls.class_name = class; size = strlen(class); BUG_ON(size > (size_t) U8_MAX); op->cls.class_len = size; ceph_pagelist_append(pagelist, class, size); payload_len += size; op->cls.method_name = method; size = strlen(method); BUG_ON(size > (size_t) U8_MAX); op->cls.method_len = size; ceph_pagelist_append(pagelist, method, size); payload_len += size; osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist); op->indata_len = payload_len; } EXPORT_SYMBOL(osd_req_op_cls_init); int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, const char *name, const void *value, size_t size, u8 cmp_op, u8 cmp_mode) { struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode, 0); struct ceph_pagelist *pagelist; size_t payload_len; BUG_ON(opcode != CEPH_OSD_OP_SETXATTR && opcode != CEPH_OSD_OP_CMPXATTR); pagelist = kmalloc(sizeof(*pagelist), GFP_NOFS); if (!pagelist) return -ENOMEM; ceph_pagelist_init(pagelist); payload_len = strlen(name); op->xattr.name_len = payload_len; ceph_pagelist_append(pagelist, name, payload_len); op->xattr.value_len = size; ceph_pagelist_append(pagelist, value, size); payload_len += size; op->xattr.cmp_op = cmp_op; op->xattr.cmp_mode = cmp_mode; ceph_osd_data_pagelist_init(&op->xattr.osd_data, pagelist); op->indata_len = payload_len; return 0; } EXPORT_SYMBOL(osd_req_op_xattr_init); void osd_req_op_watch_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode, u64 cookie, u64 version, int flag) { struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode, 0); BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH); op->watch.cookie = cookie; op->watch.ver = version; if (opcode == CEPH_OSD_OP_WATCH && flag) op->watch.flag = (u8)1; } EXPORT_SYMBOL(osd_req_op_watch_init); void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req, unsigned int which, u64 expected_object_size, u64 expected_write_size) { struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, CEPH_OSD_OP_SETALLOCHINT, 0); op->alloc_hint.expected_object_size = expected_object_size; op->alloc_hint.expected_write_size = expected_write_size; /* * CEPH_OSD_OP_SETALLOCHINT op is advisory and therefore deemed * not worth a feature bit. Set FAILOK per-op flag to make * sure older osds don't trip over an unsupported opcode. */ op->flags |= CEPH_OSD_OP_FLAG_FAILOK; } EXPORT_SYMBOL(osd_req_op_alloc_hint_init); static void ceph_osdc_msg_data_add(struct ceph_msg *msg, struct ceph_osd_data *osd_data) { u64 length = ceph_osd_data_length(osd_data); if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { BUG_ON(length > (u64) SIZE_MAX); if (length) ceph_msg_data_add_pages(msg, osd_data->pages, length, osd_data->alignment); } else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) { BUG_ON(!length); ceph_msg_data_add_pagelist(msg, osd_data->pagelist); #ifdef CONFIG_BLOCK } else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) { ceph_msg_data_add_bio(msg, osd_data->bio, length); #endif } else { BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE); } } static u32 osd_req_encode_op(struct ceph_osd_op *dst, const struct ceph_osd_req_op *src) { if (WARN_ON(!osd_req_opcode_valid(src->op))) { pr_err("unrecognized osd opcode %d\n", src->op); return 0; } switch (src->op) { case CEPH_OSD_OP_STAT: break; case CEPH_OSD_OP_READ: case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: case CEPH_OSD_OP_ZERO: case CEPH_OSD_OP_TRUNCATE: dst->extent.offset = cpu_to_le64(src->extent.offset); dst->extent.length = cpu_to_le64(src->extent.length); dst->extent.truncate_size = cpu_to_le64(src->extent.truncate_size); dst->extent.truncate_seq = cpu_to_le32(src->extent.truncate_seq); break; case CEPH_OSD_OP_CALL: dst->cls.class_len = src->cls.class_len; dst->cls.method_len = src->cls.method_len; dst->cls.indata_len = cpu_to_le32(src->cls.indata_len); break; case CEPH_OSD_OP_STARTSYNC: break; case CEPH_OSD_OP_NOTIFY_ACK: case CEPH_OSD_OP_WATCH: dst->watch.cookie = cpu_to_le64(src->watch.cookie); dst->watch.ver = cpu_to_le64(src->watch.ver); dst->watch.flag = src->watch.flag; break; case CEPH_OSD_OP_SETALLOCHINT: dst->alloc_hint.expected_object_size = cpu_to_le64(src->alloc_hint.expected_object_size); dst->alloc_hint.expected_write_size = cpu_to_le64(src->alloc_hint.expected_write_size); break; case CEPH_OSD_OP_SETXATTR: case CEPH_OSD_OP_CMPXATTR: dst->xattr.name_len = cpu_to_le32(src->xattr.name_len); dst->xattr.value_len = cpu_to_le32(src->xattr.value_len); dst->xattr.cmp_op = src->xattr.cmp_op; dst->xattr.cmp_mode = src->xattr.cmp_mode; break; case CEPH_OSD_OP_CREATE: case CEPH_OSD_OP_DELETE: break; default: pr_err("unsupported osd opcode %s\n", ceph_osd_op_name(src->op)); WARN_ON(1); return 0; } dst->op = cpu_to_le16(src->op); dst->flags = cpu_to_le32(src->flags); dst->payload_len = cpu_to_le32(src->indata_len); return src->indata_len; } /* * build new request AND message, calculate layout, and adjust file * extent as needed. * * if the file was recently truncated, we include information about its * old and new size so that the object can be updated appropriately. (we * avoid synchronously deleting truncated objects because it's slow.) * * if @do_sync, include a 'startsync' command so that the osd will flush * data quickly. */ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc, struct ceph_file_layout *layout, struct ceph_vino vino, u64 off, u64 *plen, unsigned int which, int num_ops, int opcode, int flags, struct ceph_snap_context *snapc, u32 truncate_seq, u64 truncate_size, bool use_mempool) { struct ceph_osd_request *req; u64 objnum = 0; u64 objoff = 0; u64 objlen = 0; int r; BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE && opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE); req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, GFP_NOFS); if (!req) { r = -ENOMEM; goto fail; } /* calculate max write size */ r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); if (r) goto fail; if (opcode == CEPH_OSD_OP_CREATE || opcode == CEPH_OSD_OP_DELETE) { osd_req_op_init(req, which, opcode, 0); } else { u32 object_size = le32_to_cpu(layout->fl_object_size); u32 object_base = off - objoff; if (!(truncate_seq == 1 && truncate_size == -1ULL)) { if (truncate_size <= object_base) { truncate_size = 0; } else { truncate_size -= object_base; if (truncate_size > object_size) truncate_size = object_size; } } osd_req_op_extent_init(req, which, opcode, objoff, objlen, truncate_size, truncate_seq); } req->r_flags = flags; req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); ceph_oid_printf(&req->r_base_oid, "%llx.%08llx", vino.ino, objnum); req->r_snapid = vino.snap; if (flags & CEPH_OSD_FLAG_WRITE) req->r_data_offset = off; r = ceph_osdc_alloc_messages(req, GFP_NOFS); if (r) goto fail; return req; fail: ceph_osdc_put_request(req); return ERR_PTR(r); } EXPORT_SYMBOL(ceph_osdc_new_request); /* * We keep osd requests in an rbtree, sorted by ->r_tid. */ DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node) static bool osd_homeless(struct ceph_osd *osd) { return osd->o_osd == CEPH_HOMELESS_OSD; } static struct ceph_osd_request * __lookup_request_ge(struct ceph_osd_client *osdc, u64 tid) { struct ceph_osd_request *req; struct rb_node *n = osdc->requests.rb_node; while (n) { req = rb_entry(n, struct ceph_osd_request, r_node); if (tid < req->r_tid) { if (!n->rb_left) return req; n = n->rb_left; } else if (tid > req->r_tid) { n = n->rb_right; } else { return req; } } return NULL; } static void __kick_linger_request(struct ceph_osd_request *req) { struct ceph_osd_client *osdc = req->r_osdc; struct ceph_osd *osd = req->r_osd; /* * Linger requests need to be resent with a new tid to avoid * the dup op detection logic on the OSDs. Achieve this with * a re-register dance instead of open-coding. */ ceph_osdc_get_request(req); if (!list_empty(&req->r_linger_item)) __unregister_linger_request(osdc, req); else __unregister_request(osdc, req); __register_request(osdc, req); ceph_osdc_put_request(req); /* * Unless request has been registered as both normal and * lingering, __unregister{,_linger}_request clears r_osd. * However, here we need to preserve r_osd to make sure we * requeue on the same OSD. */ WARN_ON(req->r_osd || !osd); req->r_osd = osd; dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); __enqueue_request(req); } /* * Resubmit requests pending on the given osd. */ static void __kick_osd_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd) { struct ceph_osd_request *req, *nreq; LIST_HEAD(resend); LIST_HEAD(resend_linger); int err; dout("%s osd%d\n", __func__, osd->o_osd); err = __reset_osd(osdc, osd); if (err) return; /* * Build up a list of requests to resend by traversing the * osd's list of requests. Requests for a given object are * sent in tid order, and that is also the order they're * kept on this list. Therefore all requests that are in * flight will be found first, followed by all requests that * have not yet been sent. And to resend requests while * preserving this order we will want to put any sent * requests back on the front of the osd client's unsent * list. * * So we build a separate ordered list of already-sent * requests for the affected osd and splice it onto the * front of the osd client's unsent list. Once we've seen a * request that has not yet been sent we're done. Those * requests are already sitting right where they belong. */ list_for_each_entry(req, &osd->o_requests, r_osd_item) { if (!req->r_sent) break; if (!req->r_linger) { dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid); list_move_tail(&req->r_req_lru_item, &resend); req->r_flags |= CEPH_OSD_FLAG_RETRY; } else { list_move_tail(&req->r_req_lru_item, &resend_linger); } } list_splice(&resend, &osdc->req_unsent); /* * Both registered and not yet registered linger requests are * enqueued with a new tid on the same OSD. We add/move them * to req_unsent/o_requests at the end to keep things in tid * order. */ list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, r_linger_osd_item) { WARN_ON(!list_empty(&req->r_req_lru_item)); __kick_linger_request(req); } list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item) __kick_linger_request(req); } /* * If the osd connection drops, we need to resubmit all requests. */ static void osd_reset(struct ceph_connection *con) { struct ceph_osd *osd = con->private; struct ceph_osd_client *osdc; if (!osd) return; dout("osd_reset osd%d\n", osd->o_osd); osdc = osd->o_osdc; down_read(&osdc->map_sem); mutex_lock(&osdc->request_mutex); __kick_osd_requests(osdc, osd); __send_queued(osdc); mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); } /* * Assumes @osd is zero-initialized. */ static void osd_init(struct ceph_osd *osd) { atomic_set(&osd->o_ref, 1); RB_CLEAR_NODE(&osd->o_node); INIT_LIST_HEAD(&osd->o_requests); INIT_LIST_HEAD(&osd->o_linger_requests); INIT_LIST_HEAD(&osd->o_osd_lru); INIT_LIST_HEAD(&osd->o_keepalive_item); osd->o_incarnation = 1; } static void osd_cleanup(struct ceph_osd *osd) { WARN_ON(!RB_EMPTY_NODE(&osd->o_node)); WARN_ON(!list_empty(&osd->o_requests)); WARN_ON(!list_empty(&osd->o_linger_requests)); WARN_ON(!list_empty(&osd->o_osd_lru)); WARN_ON(!list_empty(&osd->o_keepalive_item)); if (osd->o_auth.authorizer) { WARN_ON(osd_homeless(osd)); ceph_auth_destroy_authorizer(osd->o_auth.authorizer); } } /* * Track open sessions with osds. */ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) { struct ceph_osd *osd; WARN_ON(onum == CEPH_HOMELESS_OSD); osd = kzalloc(sizeof(*osd), GFP_NOFS); if (!osd) return NULL; osd_init(osd); osd->o_osdc = osdc; osd->o_osd = onum; ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); return osd; } static struct ceph_osd *get_osd(struct ceph_osd *osd) { if (atomic_inc_not_zero(&osd->o_ref)) { dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1, atomic_read(&osd->o_ref)); return osd; } else { dout("get_osd %p FAIL\n", osd); return NULL; } } static void put_osd(struct ceph_osd *osd) { dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref), atomic_read(&osd->o_ref) - 1); if (atomic_dec_and_test(&osd->o_ref)) { osd_cleanup(osd); kfree(osd); } } DEFINE_RB_FUNCS(osd, struct ceph_osd, o_osd, o_node) /* * remove an osd from our map */ static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("%s %p osd%d\n", __func__, osd, osd->o_osd); WARN_ON(!list_empty(&osd->o_requests)); WARN_ON(!list_empty(&osd->o_linger_requests)); list_del_init(&osd->o_osd_lru); erase_osd(&osdc->osds, osd); } static void remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("%s %p osd%d\n", __func__, osd, osd->o_osd); if (!RB_EMPTY_NODE(&osd->o_node)) { ceph_con_close(&osd->o_con); __remove_osd(osdc, osd); put_osd(osd); } } static void __move_osd_to_lru(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("%s %p\n", __func__, osd); BUG_ON(!list_empty(&osd->o_osd_lru)); list_add_tail(&osd->o_osd_lru, &osdc->osd_lru); osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl; } static void maybe_move_osd_to_lru(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("%s %p\n", __func__, osd); if (list_empty(&osd->o_requests) && list_empty(&osd->o_linger_requests)) __move_osd_to_lru(osdc, osd); } static void __remove_osd_from_lru(struct ceph_osd *osd) { dout("__remove_osd_from_lru %p\n", osd); if (!list_empty(&osd->o_osd_lru)) list_del_init(&osd->o_osd_lru); } /* * reset osd connect */ static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) { struct ceph_entity_addr *peer_addr; dout("__reset_osd %p osd%d\n", osd, osd->o_osd); if (list_empty(&osd->o_requests) && list_empty(&osd->o_linger_requests)) { remove_osd(osdc, osd); return -ENODEV; } peer_addr = &osdc->osdmap->osd_addr[osd->o_osd]; if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) && !ceph_con_opened(&osd->o_con)) { struct ceph_osd_request *req; dout("osd addr hasn't changed and connection never opened, " "letting msgr retry\n"); /* touch each r_stamp for handle_timeout()'s benfit */ list_for_each_entry(req, &osd->o_requests, r_osd_item) 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; } /* * Register request, assign tid. If this is the first request, set up * the timeout event. */ static void __register_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { req->r_tid = ++osdc->last_tid; req->r_request->hdr.tid = cpu_to_le64(req->r_tid); dout("__register_request %p tid %lld\n", req, req->r_tid); insert_request(&osdc->requests, req); ceph_osdc_get_request(req); osdc->num_requests++; } /* * called under osdc->request_mutex */ static void __unregister_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { if (RB_EMPTY_NODE(&req->r_node)) { dout("__unregister_request %p tid %lld not registered\n", req, req->r_tid); return; } dout("__unregister_request %p tid %lld\n", req, req->r_tid); erase_request(&osdc->requests, req); osdc->num_requests--; if (req->r_osd) { /* make sure the original request isn't in flight. */ ceph_msg_revoke(req->r_request); list_del_init(&req->r_osd_item); maybe_move_osd_to_lru(osdc, req->r_osd); if (list_empty(&req->r_linger_osd_item)) req->r_osd = NULL; } list_del_init(&req->r_req_lru_item); ceph_osdc_put_request(req); } /* * Cancel a previously queued request message */ static void __cancel_request(struct ceph_osd_request *req) { if (req->r_sent && req->r_osd) { ceph_msg_revoke(req->r_request); req->r_sent = 0; } } static void __register_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { dout("%s %p tid %llu\n", __func__, req, req->r_tid); WARN_ON(!req->r_linger); ceph_osdc_get_request(req); list_add_tail(&req->r_linger_item, &osdc->req_linger); if (req->r_osd) list_add_tail(&req->r_linger_osd_item, &req->r_osd->o_linger_requests); } static void __unregister_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { WARN_ON(!req->r_linger); if (list_empty(&req->r_linger_item)) { dout("%s %p tid %llu not registered\n", __func__, req, req->r_tid); return; } dout("%s %p tid %llu\n", __func__, req, req->r_tid); list_del_init(&req->r_linger_item); if (req->r_osd) { list_del_init(&req->r_linger_osd_item); maybe_move_osd_to_lru(osdc, req->r_osd); if (list_empty(&req->r_osd_item)) req->r_osd = NULL; } ceph_osdc_put_request(req); } void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { if (!req->r_linger) { dout("set_request_linger %p\n", req); req->r_linger = 1; } } EXPORT_SYMBOL(ceph_osdc_set_request_linger); 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; } /* * Returns whether a request should be blocked from being sent * based on the current osdmap and osd_client settings. * * Caller should hold map_sem for read. */ static bool target_should_be_paused(struct ceph_osd_client *osdc, const struct ceph_osd_request_target *t, struct ceph_pg_pool_info *pi) { bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || __pool_full(pi); WARN_ON(pi->id != t->base_oloc.pool); return (t->flags & CEPH_OSD_FLAG_READ && pauserd) || (t->flags & CEPH_OSD_FLAG_WRITE && pausewr); } enum calc_target_result { CALC_TARGET_NO_ACTION = 0, CALC_TARGET_NEED_RESEND, CALC_TARGET_POOL_DNE, }; static enum calc_target_result calc_target(struct ceph_osd_client *osdc, struct ceph_osd_request_target *t, u32 *last_force_resend, bool any_change) { struct ceph_pg_pool_info *pi; struct ceph_pg pgid, last_pgid; struct ceph_osds up, acting; bool force_resend = false; bool need_check_tiering = false; bool need_resend = false; bool sort_bitwise = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_SORTBITWISE); enum calc_target_result ct_res; int ret; pi = ceph_pg_pool_by_id(osdc->osdmap, t->base_oloc.pool); if (!pi) { t->osd = CEPH_HOMELESS_OSD; ct_res = CALC_TARGET_POOL_DNE; goto out; } if (osdc->osdmap->epoch == pi->last_force_request_resend) { if (last_force_resend && *last_force_resend < pi->last_force_request_resend) { *last_force_resend = pi->last_force_request_resend; force_resend = true; } else if (!last_force_resend) { force_resend = true; } } if (ceph_oid_empty(&t->target_oid) || force_resend) { ceph_oid_copy(&t->target_oid, &t->base_oid); need_check_tiering = true; } if (ceph_oloc_empty(&t->target_oloc) || force_resend) { ceph_oloc_copy(&t->target_oloc, &t->base_oloc); need_check_tiering = true; } if (need_check_tiering && (t->flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { if (t->flags & CEPH_OSD_FLAG_READ && pi->read_tier >= 0) t->target_oloc.pool = pi->read_tier; if (t->flags & CEPH_OSD_FLAG_WRITE && pi->write_tier >= 0) t->target_oloc.pool = pi->write_tier; } ret = ceph_object_locator_to_pg(osdc->osdmap, &t->target_oid, &t->target_oloc, &pgid); if (ret) { WARN_ON(ret != -ENOENT); t->osd = CEPH_HOMELESS_OSD; ct_res = CALC_TARGET_POOL_DNE; goto out; } last_pgid.pool = pgid.pool; last_pgid.seed = ceph_stable_mod(pgid.seed, t->pg_num, t->pg_num_mask); ceph_pg_to_up_acting_osds(osdc->osdmap, &pgid, &up, &acting); if (any_change && ceph_is_new_interval(&t->acting, &acting, &t->up, &up, t->size, pi->size, t->min_size, pi->min_size, t->pg_num, pi->pg_num, t->sort_bitwise, sort_bitwise, &last_pgid)) force_resend = true; if (t->paused && !target_should_be_paused(osdc, t, pi)) { t->paused = false; need_resend = true; } if (ceph_pg_compare(&t->pgid, &pgid) || ceph_osds_changed(&t->acting, &acting, any_change) || force_resend) { t->pgid = pgid; /* struct */ ceph_osds_copy(&t->acting, &acting); ceph_osds_copy(&t->up, &up); t->size = pi->size; t->min_size = pi->min_size; t->pg_num = pi->pg_num; t->pg_num_mask = pi->pg_num_mask; t->sort_bitwise = sort_bitwise; t->osd = acting.primary; need_resend = true; } ct_res = need_resend ? CALC_TARGET_NEED_RESEND : CALC_TARGET_NO_ACTION; out: dout("%s t %p -> ct_res %d osd %d\n", __func__, t, ct_res, t->osd); return ct_res; } static void __enqueue_request(struct ceph_osd_request *req) { struct ceph_osd_client *osdc = req->r_osdc; dout("%s %p tid %llu to osd%d\n", __func__, req, req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); if (req->r_osd) { __remove_osd_from_lru(req->r_osd); list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); list_move_tail(&req->r_req_lru_item, &osdc->req_unsent); } else { list_move_tail(&req->r_req_lru_item, &osdc->req_notarget); } } /* * Pick an osd (the first 'up' osd in the pg), allocate the osd struct * (as needed), and set the request r_osd appropriately. If there is * no up osd, set r_osd to NULL. Move the request to the appropriate list * (unsent, homeless) or leave on in-flight lru. * * Return 0 if unchanged, 1 if changed, or negative on error. * * Caller should hold map_sem for read and request_mutex. */ static int __map_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req, int force_resend) { enum calc_target_result ct_res; int err; dout("map_request %p tid %lld\n", req, req->r_tid); ct_res = calc_target(osdc, &req->r_t, NULL, force_resend); switch (ct_res) { case CALC_TARGET_POOL_DNE: list_move(&req->r_req_lru_item, &osdc->req_notarget); return -EIO; case CALC_TARGET_NO_ACTION: return 0; /* no change */ default: BUG_ON(ct_res != CALC_TARGET_NEED_RESEND); } dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd, req->r_osd ? req->r_osd->o_osd : -1); if (req->r_osd) { __cancel_request(req); list_del_init(&req->r_osd_item); list_del_init(&req->r_linger_osd_item); req->r_osd = NULL; } req->r_osd = lookup_osd(&osdc->osds, req->r_t.osd); if (!req->r_osd && req->r_t.osd >= 0) { err = -ENOMEM; req->r_osd = create_osd(osdc, req->r_t.osd); if (!req->r_osd) { list_move(&req->r_req_lru_item, &osdc->req_notarget); goto out; } dout("map_request osd %p is osd%d\n", req->r_osd, req->r_osd->o_osd); insert_osd(&osdc->osds, req->r_osd); ceph_con_open(&req->r_osd->o_con, CEPH_ENTITY_TYPE_OSD, req->r_osd->o_osd, &osdc->osdmap->osd_addr[req->r_osd->o_osd]); } __enqueue_request(req); err = 1; /* osd or pg changed */ out: return err; } static void setup_request_data(struct ceph_osd_request *req, struct ceph_msg *msg) { u32 data_len = 0; int i; if (!list_empty(&msg->data)) return; WARN_ON(msg->data_length); for (i = 0; i < req->r_num_ops; i++) { struct ceph_osd_req_op *op = &req->r_ops[i]; switch (op->op) { /* request */ case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: WARN_ON(op->indata_len != op->extent.length); ceph_osdc_msg_data_add(msg, &op->extent.osd_data); break; case CEPH_OSD_OP_SETXATTR: case CEPH_OSD_OP_CMPXATTR: WARN_ON(op->indata_len != op->xattr.name_len + op->xattr.value_len); ceph_osdc_msg_data_add(msg, &op->xattr.osd_data); break; /* reply */ case CEPH_OSD_OP_STAT: ceph_osdc_msg_data_add(req->r_reply, &op->raw_data_in); break; case CEPH_OSD_OP_READ: ceph_osdc_msg_data_add(req->r_reply, &op->extent.osd_data); break; /* both */ case CEPH_OSD_OP_CALL: WARN_ON(op->indata_len != op->cls.class_len + op->cls.method_len + op->cls.indata_len); ceph_osdc_msg_data_add(msg, &op->cls.request_info); /* optional, can be NONE */ ceph_osdc_msg_data_add(msg, &op->cls.request_data); /* optional, can be NONE */ ceph_osdc_msg_data_add(req->r_reply, &op->cls.response_data); break; } data_len += op->indata_len; } WARN_ON(data_len != msg->data_length); } static void encode_request(struct ceph_osd_request *req, struct ceph_msg *msg) { void *p = msg->front.iov_base; void *const end = p + msg->front_alloc_len; u32 data_len = 0; int i; if (req->r_flags & CEPH_OSD_FLAG_WRITE) { /* snapshots aren't writeable */ WARN_ON(req->r_snapid != CEPH_NOSNAP); } else { WARN_ON(req->r_mtime.tv_sec || req->r_mtime.tv_nsec || req->r_data_offset || req->r_snapc); } setup_request_data(req, msg); ceph_encode_32(&p, 1); /* client_inc, always 1 */ ceph_encode_32(&p, req->r_osdc->osdmap->epoch); ceph_encode_32(&p, req->r_flags); ceph_encode_timespec(p, &req->r_mtime); p += sizeof(struct ceph_timespec); /* aka reassert_version */ memcpy(p, &req->r_replay_version, sizeof(req->r_replay_version)); p += sizeof(req->r_replay_version); /* oloc */ ceph_encode_8(&p, 4); ceph_encode_8(&p, 4); ceph_encode_32(&p, 8 + 4 + 4); ceph_encode_64(&p, req->r_t.target_oloc.pool); ceph_encode_32(&p, -1); /* preferred */ ceph_encode_32(&p, 0); /* key len */ /* pgid */ ceph_encode_8(&p, 1); ceph_encode_64(&p, req->r_t.pgid.pool); ceph_encode_32(&p, req->r_t.pgid.seed); ceph_encode_32(&p, -1); /* preferred */ /* oid */ ceph_encode_32(&p, req->r_t.target_oid.name_len); memcpy(p, req->r_t.target_oid.name, req->r_t.target_oid.name_len); p += req->r_t.target_oid.name_len; /* ops, can imply data */ ceph_encode_16(&p, req->r_num_ops); for (i = 0; i < req->r_num_ops; i++) { data_len += osd_req_encode_op(p, &req->r_ops[i]); p += sizeof(struct ceph_osd_op); } ceph_encode_64(&p, req->r_snapid); /* snapid */ if (req->r_snapc) { ceph_encode_64(&p, req->r_snapc->seq); ceph_encode_32(&p, req->r_snapc->num_snaps); for (i = 0; i < req->r_snapc->num_snaps; i++) ceph_encode_64(&p, req->r_snapc->snaps[i]); } else { ceph_encode_64(&p, 0); /* snap_seq */ ceph_encode_32(&p, 0); /* snaps len */ } ceph_encode_32(&p, req->r_attempts); /* retry_attempt */ BUG_ON(p > end); msg->front.iov_len = p - msg->front.iov_base; msg->hdr.version = cpu_to_le16(4); /* MOSDOp v4 */ msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); msg->hdr.data_len = cpu_to_le32(data_len); /* * The header "data_off" is a hint to the receiver allowing it * to align received data into its buffers such that there's no * need to re-copy it before writing it to disk (direct I/O). */ msg->hdr.data_off = cpu_to_le16(req->r_data_offset); dout("%s req %p oid %*pE oid_len %d front %zu data %u\n", __func__, req, req->r_t.target_oid.name_len, req->r_t.target_oid.name, req->r_t.target_oid.name_len, msg->front.iov_len, data_len); } /* * @req has to be assigned a tid and registered. */ static void send_request(struct ceph_osd_request *req) { struct ceph_osd *osd = req->r_osd; WARN_ON(osd->o_osd != req->r_t.osd); req->r_flags |= CEPH_OSD_FLAG_KNOWN_REDIR; if (req->r_attempts) req->r_flags |= CEPH_OSD_FLAG_RETRY; else WARN_ON(req->r_flags & CEPH_OSD_FLAG_RETRY); encode_request(req, req->r_request); dout("%s req %p tid %llu to pg %llu.%x osd%d flags 0x%x attempt %d\n", __func__, req, req->r_tid, req->r_t.pgid.pool, req->r_t.pgid.seed, req->r_t.osd, req->r_flags, req->r_attempts); req->r_t.paused = false; req->r_stamp = jiffies; req->r_attempts++; req->r_sent = osd->o_incarnation; req->r_request->hdr.tid = cpu_to_le64(req->r_tid); ceph_con_send(&osd->o_con, ceph_msg_get(req->r_request)); } /* * Send any requests in the queue (req_unsent). */ static void __send_queued(struct ceph_osd_client *osdc) { struct ceph_osd_request *req, *tmp; dout("__send_queued\n"); list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) { list_move_tail(&req->r_req_lru_item, &osdc->req_lru); send_request(req); } } static void maybe_request_map(struct ceph_osd_client *osdc) { bool continuous = false; WARN_ON(!osdc->osdmap->epoch); if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR)) { 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); } /* * Caller should hold map_sem for read and request_mutex. */ static int __ceph_osdc_start_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req, bool nofail) { int rc; __register_request(osdc, req); req->r_sent = 0; req->r_got_reply = 0; rc = __map_request(osdc, req, 0); if (rc < 0) { if (nofail) { dout("osdc_start_request failed map, " " will retry %lld\n", req->r_tid); rc = 0; } else { __unregister_request(osdc, req); } return rc; } if (req->r_osd == NULL) { dout("send_request %p no up osds in pg\n", req); ceph_monc_request_next_osdmap(&osdc->client->monc); } else { __send_queued(osdc); } return 0; } static void __complete_request(struct ceph_osd_request *req) { if (req->r_callback) req->r_callback(req); else complete_all(&req->r_completion); } /* * 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; struct ceph_osd_request *req; struct ceph_osd *osd; struct list_head slow_osds; dout("timeout\n"); down_read(&osdc->map_sem); ceph_monc_request_next_osdmap(&osdc->client->monc); mutex_lock(&osdc->request_mutex); /* * ping osds that are a bit slow. this ensures that if there * is a break in the TCP connection we will notice, and reopen * a connection with that osd (from the fault callback). */ INIT_LIST_HEAD(&slow_osds); list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) { if (time_before(jiffies, req->r_stamp + opts->osd_keepalive_timeout)) break; osd = req->r_osd; BUG_ON(!osd); dout(" tid %llu is slow, will send keepalive on osd%d\n", req->r_tid, osd->o_osd); list_move_tail(&osd->o_keepalive_item, &slow_osds); } while (!list_empty(&slow_osds)) { osd = list_entry(slow_osds.next, struct ceph_osd, o_keepalive_item); list_del_init(&osd->o_keepalive_item); ceph_con_keepalive(&osd->o_con); } __send_queued(osdc); mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); 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_read(&osdc->map_sem); mutex_lock(&osdc->request_mutex); list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { if (time_before(jiffies, osd->lru_ttl)) break; remove_osd(osdc, osd); } mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); 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) { len = ceph_decode_32(p); if (len > 0) { pr_warn("ceph_object_locator::nspace is set\n"); goto e_inval; } } if (struct_v >= 6) { s64 hash = ceph_decode_64(p); if (hash != -1) { pr_warn("ceph_object_locator::hash is set\n"); goto e_inval; } } /* skip the rest */ *p = struct_end; out: return ret; e_inval: ret = -EINVAL; goto out; } static int ceph_redirect_decode(void **p, void *end, struct ceph_request_redirect *redir) { u8 struct_v, struct_cv; u32 len; void *struct_end; int ret; ceph_decode_need(p, end, 1 + 1 + 4, e_inval); struct_v = ceph_decode_8(p); struct_cv = ceph_decode_8(p); if (struct_cv > 1) { pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n", struct_v, struct_cv); goto e_inval; } len = ceph_decode_32(p); ceph_decode_need(p, end, len, e_inval); struct_end = *p + len; ret = ceph_oloc_decode(p, end, &redir->oloc); if (ret) goto out; len = ceph_decode_32(p); if (len > 0) { pr_warn("ceph_request_redirect::object_name is set\n"); goto e_inval; } len = ceph_decode_32(p); *p += len; /* skip osd_instructions */ /* skip the rest */ *p = struct_end; out: return ret; e_inval: ret = -EINVAL; goto out; } struct MOSDOpReply { struct ceph_pg pgid; u64 flags; int result; u32 epoch; int num_ops; u32 outdata_len[CEPH_OSD_MAX_OPS]; s32 rval[CEPH_OSD_MAX_OPS]; int retry_attempt; struct ceph_eversion replay_version; u64 user_version; struct ceph_request_redirect redirect; }; static int decode_MOSDOpReply(const struct ceph_msg *msg, struct MOSDOpReply *m) { void *p = msg->front.iov_base; void *const end = p + msg->front.iov_len; u16 version = le16_to_cpu(msg->hdr.version); struct ceph_eversion bad_replay_version; u8 decode_redir; u32 len; int ret; int i; ceph_decode_32_safe(&p, end, len, e_inval); ceph_decode_need(&p, end, len, e_inval); p += len; /* skip oid */ ret = ceph_decode_pgid(&p, end, &m->pgid); if (ret) return ret; ceph_decode_64_safe(&p, end, m->flags, e_inval); ceph_decode_32_safe(&p, end, m->result, e_inval); ceph_decode_need(&p, end, sizeof(bad_replay_version), e_inval); memcpy(&bad_replay_version, p, sizeof(bad_replay_version)); p += sizeof(bad_replay_version); ceph_decode_32_safe(&p, end, m->epoch, e_inval); ceph_decode_32_safe(&p, end, m->num_ops, e_inval); if (m->num_ops > ARRAY_SIZE(m->outdata_len)) goto e_inval; ceph_decode_need(&p, end, m->num_ops * sizeof(struct ceph_osd_op), e_inval); for (i = 0; i < m->num_ops; i++) { struct ceph_osd_op *op = p; m->outdata_len[i] = le32_to_cpu(op->payload_len); p += sizeof(*op); } ceph_decode_32_safe(&p, end, m->retry_attempt, e_inval); for (i = 0; i < m->num_ops; i++) ceph_decode_32_safe(&p, end, m->rval[i], e_inval); if (version >= 5) { ceph_decode_need(&p, end, sizeof(m->replay_version), e_inval); memcpy(&m->replay_version, p, sizeof(m->replay_version)); p += sizeof(m->replay_version); ceph_decode_64_safe(&p, end, m->user_version, e_inval); } else { m->replay_version = bad_replay_version; /* struct */ m->user_version = le64_to_cpu(m->replay_version.version); } if (version >= 6) { if (version >= 7) ceph_decode_8_safe(&p, end, decode_redir, e_inval); else decode_redir = 1; } else { decode_redir = 0; } if (decode_redir) { ret = ceph_redirect_decode(&p, end, &m->redirect); if (ret) return ret; } else { ceph_oloc_init(&m->redirect.oloc); } return 0; e_inval: return -EINVAL; } /* * We are done with @req if * - @m is a safe reply, or * - @m is an unsafe reply and we didn't want a safe one */ static bool done_request(const struct ceph_osd_request *req, const struct MOSDOpReply *m) { return (m->result < 0 || (m->flags & CEPH_OSD_FLAG_ONDISK) || !(req->r_flags & CEPH_OSD_FLAG_ONDISK)); } /* * handle osd op reply. either call the callback if it is specified, * or do the completion to wake up the waiting thread. * * ->r_unsafe_callback is set? yes no * * first reply is OK (needed r_cb/r_completion, r_cb/r_completion, * any or needed/got safe) r_safe_completion r_safe_completion * * first reply is unsafe r_unsafe_cb(true) (nothing) * * when we get the safe reply r_unsafe_cb(false), r_cb/r_completion, * r_safe_completion r_safe_completion */ static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg) { struct ceph_osd_request *req; struct MOSDOpReply m; u64 tid = le64_to_cpu(msg->hdr.tid); u32 data_len = 0; bool already_acked; int ret; int i; dout("%s msg %p tid %llu\n", __func__, msg, tid); down_read(&osdc->map_sem); mutex_lock(&osdc->request_mutex); req = lookup_request(&osdc->requests, tid); if (!req) { dout("%s no tid %llu\n", __func__, tid); goto out_unlock; } ceph_osdc_get_request(req); ret = decode_MOSDOpReply(msg, &m); if (ret) { pr_err("failed to decode MOSDOpReply for tid %llu: %d\n", req->r_tid, ret); ceph_msg_dump(msg); goto fail_request; } dout("%s req %p tid %llu flags 0x%llx pgid %llu.%x epoch %u attempt %d v %u'%llu uv %llu\n", __func__, req, req->r_tid, m.flags, m.pgid.pool, m.pgid.seed, m.epoch, m.retry_attempt, le32_to_cpu(m.replay_version.epoch), le64_to_cpu(m.replay_version.version), m.user_version); if (m.retry_attempt >= 0) { if (m.retry_attempt != req->r_attempts - 1) { dout("req %p tid %llu retry_attempt %d != %d, ignoring\n", req, req->r_tid, m.retry_attempt, req->r_attempts - 1); goto out_put; } } else { WARN_ON(1); /* MOSDOpReply v4 is assumed */ } if (!ceph_oloc_empty(&m.redirect.oloc)) { dout("req %p tid %llu redirect pool %lld\n", req, req->r_tid, m.redirect.oloc.pool); __unregister_request(osdc, req); ceph_oloc_copy(&req->r_t.target_oloc, &m.redirect.oloc); /* * Start redirect requests with nofail=true. If * mapping fails, request will end up on the notarget * list, waiting for the new osdmap (which can take * a while), even though the original request mapped * successfully. In the future we might want to follow * original request's nofail setting here. */ ret = __ceph_osdc_start_request(osdc, req, true); BUG_ON(ret); goto out_put; } if (m.num_ops != req->r_num_ops) { pr_err("num_ops %d != %d for tid %llu\n", m.num_ops, req->r_num_ops, req->r_tid); goto fail_request; } for (i = 0; i < req->r_num_ops; i++) { dout(" req %p tid %llu op %d rval %d len %u\n", req, req->r_tid, i, m.rval[i], m.outdata_len[i]); req->r_ops[i].rval = m.rval[i]; req->r_ops[i].outdata_len = m.outdata_len[i]; data_len += m.outdata_len[i]; } if (data_len != le32_to_cpu(msg->hdr.data_len)) { pr_err("sum of lens %u != %u for tid %llu\n", data_len, le32_to_cpu(msg->hdr.data_len), req->r_tid); goto fail_request; } dout("%s req %p tid %llu acked %d result %d data_len %u\n", __func__, req, req->r_tid, req->r_got_reply, m.result, data_len); already_acked = req->r_got_reply; if (!already_acked) { req->r_result = m.result ?: data_len; req->r_replay_version = m.replay_version; /* struct */ req->r_got_reply = true; } else if (!(m.flags & CEPH_OSD_FLAG_ONDISK)) { dout("req %p tid %llu dup ack\n", req, req->r_tid); goto out_put; } if (done_request(req, &m)) { __unregister_request(osdc, req); if (req->r_linger) { WARN_ON(req->r_unsafe_callback); __register_linger_request(osdc, req); } } mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); if (done_request(req, &m)) { if (already_acked && req->r_unsafe_callback) { dout("req %p tid %llu safe-cb\n", req, req->r_tid); req->r_unsafe_callback(req, false); } else { dout("req %p tid %llu cb\n", req, req->r_tid); __complete_request(req); } } else { if (req->r_unsafe_callback) { dout("req %p tid %llu unsafe-cb\n", req, req->r_tid); req->r_unsafe_callback(req, true); } else { WARN_ON(1); } } if (m.flags & CEPH_OSD_FLAG_ONDISK) complete_all(&req->r_safe_completion); ceph_osdc_put_request(req); return; fail_request: req->r_result = -EIO; __unregister_request(osdc, req); __complete_request(req); complete_all(&req->r_safe_completion); out_put: ceph_osdc_put_request(req); out_unlock: mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); } 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 void reset_changed_osds(struct ceph_osd_client *osdc) { struct rb_node *p, *n; dout("%s %p\n", __func__, osdc); for (p = rb_first(&osdc->osds); p; p = n) { struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node); n = rb_next(p); if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) || memcmp(&osd->o_con.peer_addr, ceph_osd_addr(osdc->osdmap, osd->o_osd), sizeof(struct ceph_entity_addr)) != 0) __reset_osd(osdc, osd); } } /* * Requeue requests whose mapping to an OSD has changed. If requests map to * no osd, request a new map. * * Caller should hold map_sem for read. */ static void kick_requests(struct ceph_osd_client *osdc, bool force_resend, bool force_resend_writes) { struct ceph_osd_request *req, *nreq; struct rb_node *p; int needmap = 0; int err; bool force_resend_req; dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "", force_resend_writes ? " (force resend writes)" : ""); mutex_lock(&osdc->request_mutex); for (p = rb_first(&osdc->requests); p; ) { req = rb_entry(p, struct ceph_osd_request, r_node); p = rb_next(p); /* * For linger requests that have not yet been * registered, move them to the linger list; they'll * be sent to the osd in the loop below. Unregister * the request before re-registering it as a linger * request to ensure the __map_request() below * will decide it needs to be sent. */ if (req->r_linger && list_empty(&req->r_linger_item)) { dout("%p tid %llu restart on osd%d\n", req, req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); ceph_osdc_get_request(req); __unregister_request(osdc, req); __register_linger_request(osdc, req); ceph_osdc_put_request(req); continue; } force_resend_req = force_resend || (force_resend_writes && req->r_flags & CEPH_OSD_FLAG_WRITE); err = __map_request(osdc, req, force_resend_req); if (err < 0) continue; /* error */ if (req->r_osd == NULL) { dout("%p tid %llu maps to no osd\n", req, req->r_tid); needmap++; /* request a newer map */ } else if (err > 0) { if (!req->r_linger) { dout("%p tid %llu requeued on osd%d\n", req, req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); req->r_flags |= CEPH_OSD_FLAG_RETRY; } } } list_for_each_entry_safe(req, nreq, &osdc->req_linger, r_linger_item) { dout("linger req=%p req->r_osd=%p\n", req, req->r_osd); err = __map_request(osdc, req, force_resend || force_resend_writes); dout("__map_request returned %d\n", err); if (err < 0) continue; /* hrm! */ if (req->r_osd == NULL || err > 0) { if (req->r_osd == NULL) { dout("lingering %p tid %llu maps to no osd\n", req, req->r_tid); /* * A homeless lingering request makes * no sense, as it's job is to keep * a particular OSD connection open. * Request a newer map and kick the * request, knowing that it won't be * resent until we actually get a map * that can tell us where to send it. */ needmap++; } dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid, req->r_osd ? req->r_osd->o_osd : -1); __register_request(osdc, req); __unregister_linger_request(osdc, req); } } reset_changed_osds(osdc); mutex_unlock(&osdc->request_mutex); if (needmap) { dout("%d requests for down osds, need new map\n", needmap); ceph_monc_request_next_osdmap(&osdc->client->monc); } } static int handle_one_map(struct ceph_osd_client *osdc, void *p, void *end, bool incremental) { struct ceph_osdmap *newmap; struct rb_node *n; bool skipped_map = false; bool was_full; was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); set_pool_was_full(osdc); if (incremental) newmap = osdmap_apply_incremental(&p, end, osdc->osdmap); else newmap = ceph_osdmap_decode(&p, end); if (IS_ERR(newmap)) return PTR_ERR(newmap); if (newmap != osdc->osdmap) { /* * Preserve ->was_full before destroying the old map. * For pools that weren't in the old map, ->was_full * should be false. */ for (n = rb_first(&newmap->pg_pools); n; n = rb_next(n)) { struct ceph_pg_pool_info *pi = rb_entry(n, struct ceph_pg_pool_info, node); struct ceph_pg_pool_info *old_pi; old_pi = ceph_pg_pool_by_id(osdc->osdmap, pi->id); if (old_pi) pi->was_full = old_pi->was_full; else WARN_ON(pi->was_full); } if (osdc->osdmap->epoch && osdc->osdmap->epoch + 1 < newmap->epoch) { WARN_ON(incremental); skipped_map = true; } ceph_osdmap_destroy(osdc->osdmap); osdc->osdmap = newmap; } was_full &= !ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); kick_requests(osdc, skipped_map, was_full); return 0; } /* * 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; 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->map_sem); /* 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->osdmap, CEPH_OSDMAP_PAUSERD); was_pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || ceph_osdmap_flag(osdc->osdmap, 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); 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); 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->osdmap, CEPH_OSDMAP_PAUSERD); pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL) || have_pool_full(osdc); if (was_pauserd || was_pausewr || pauserd || pausewr) maybe_request_map(osdc); mutex_lock(&osdc->request_mutex); __send_queued(osdc); mutex_unlock(&osdc->request_mutex); ceph_monc_got_map(&osdc->client->monc, CEPH_SUB_OSDMAP, osdc->osdmap->epoch); up_write(&osdc->map_sem); wake_up_all(&osdc->client->auth_wq); return; bad: pr_err("osdc handle_map corrupt msg\n"); ceph_msg_dump(msg); up_write(&osdc->map_sem); } /* * watch/notify callback event infrastructure * * These callbacks are used both for watch and notify operations. */ static void __release_event(struct kref *kref) { struct ceph_osd_event *event = container_of(kref, struct ceph_osd_event, kref); dout("__release_event %p\n", event); kfree(event); } static void get_event(struct ceph_osd_event *event) { kref_get(&event->kref); } void ceph_osdc_put_event(struct ceph_osd_event *event) { kref_put(&event->kref, __release_event); } EXPORT_SYMBOL(ceph_osdc_put_event); static void __insert_event(struct ceph_osd_client *osdc, struct ceph_osd_event *new) { struct rb_node **p = &osdc->event_tree.rb_node; struct rb_node *parent = NULL; struct ceph_osd_event *event = NULL; while (*p) { parent = *p; event = rb_entry(parent, struct ceph_osd_event, node); if (new->cookie < event->cookie) p = &(*p)->rb_left; else if (new->cookie > event->cookie) p = &(*p)->rb_right; else BUG(); } rb_link_node(&new->node, parent, p); rb_insert_color(&new->node, &osdc->event_tree); } static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc, u64 cookie) { struct rb_node **p = &osdc->event_tree.rb_node; struct rb_node *parent = NULL; struct ceph_osd_event *event = NULL; while (*p) { parent = *p; event = rb_entry(parent, struct ceph_osd_event, node); if (cookie < event->cookie) p = &(*p)->rb_left; else if (cookie > event->cookie) p = &(*p)->rb_right; else return event; } return NULL; } static void __remove_event(struct ceph_osd_event *event) { struct ceph_osd_client *osdc = event->osdc; if (!RB_EMPTY_NODE(&event->node)) { dout("__remove_event removed %p\n", event); rb_erase(&event->node, &osdc->event_tree); ceph_osdc_put_event(event); } else { dout("__remove_event didn't remove %p\n", event); } } int ceph_osdc_create_event(struct ceph_osd_client *osdc, void (*event_cb)(u64, u64, u8, void *), void *data, struct ceph_osd_event **pevent) { struct ceph_osd_event *event; event = kmalloc(sizeof(*event), GFP_NOIO); if (!event) return -ENOMEM; dout("create_event %p\n", event); event->cb = event_cb; event->one_shot = 0; event->data = data; event->osdc = osdc; INIT_LIST_HEAD(&event->osd_node); RB_CLEAR_NODE(&event->node); kref_init(&event->kref); /* one ref for us */ kref_get(&event->kref); /* one ref for the caller */ spin_lock(&osdc->event_lock); event->cookie = ++osdc->event_count; __insert_event(osdc, event); spin_unlock(&osdc->event_lock); *pevent = event; return 0; } EXPORT_SYMBOL(ceph_osdc_create_event); void ceph_osdc_cancel_event(struct ceph_osd_event *event) { struct ceph_osd_client *osdc = event->osdc; dout("cancel_event %p\n", event); spin_lock(&osdc->event_lock); __remove_event(event); spin_unlock(&osdc->event_lock); ceph_osdc_put_event(event); /* caller's */ } EXPORT_SYMBOL(ceph_osdc_cancel_event); static void do_event_work(struct work_struct *work) { struct ceph_osd_event_work *event_work = container_of(work, struct ceph_osd_event_work, work); struct ceph_osd_event *event = event_work->event; u64 ver = event_work->ver; u64 notify_id = event_work->notify_id; u8 opcode = event_work->opcode; dout("do_event_work completing %p\n", event); event->cb(ver, notify_id, opcode, event->data); dout("do_event_work completed %p\n", event); ceph_osdc_put_event(event); kfree(event_work); } /* * Process osd watch notifications */ static void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg) { void *p, *end; u8 proto_ver; u64 cookie, ver, notify_id; u8 opcode; struct ceph_osd_event *event; struct ceph_osd_event_work *event_work; p = msg->front.iov_base; end = p + msg->front.iov_len; ceph_decode_8_safe(&p, end, proto_ver, bad); ceph_decode_8_safe(&p, end, opcode, bad); ceph_decode_64_safe(&p, end, cookie, bad); ceph_decode_64_safe(&p, end, ver, bad); ceph_decode_64_safe(&p, end, notify_id, bad); spin_lock(&osdc->event_lock); event = __find_event(osdc, cookie); if (event) { BUG_ON(event->one_shot); get_event(event); } spin_unlock(&osdc->event_lock); dout("handle_watch_notify cookie %lld ver %lld event %p\n", cookie, ver, event); if (event) { event_work = kmalloc(sizeof(*event_work), GFP_NOIO); if (!event_work) { pr_err("couldn't allocate event_work\n"); ceph_osdc_put_event(event); return; } INIT_WORK(&event_work->work, do_event_work); event_work->event = event; event_work->ver = ver; event_work->notify_id = notify_id; event_work->opcode = opcode; queue_work(osdc->notify_wq, &event_work->work); } return; bad: pr_err("osdc handle_watch_notify corrupt msg\n"); } /* * Register request, send initial attempt. */ int ceph_osdc_start_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req, bool nofail) { int rc; down_read(&osdc->map_sem); mutex_lock(&osdc->request_mutex); rc = __ceph_osdc_start_request(osdc, req, nofail); mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); return rc; } EXPORT_SYMBOL(ceph_osdc_start_request); /* * Unregister a registered request. The request is not completed (i.e. * no callbacks or wakeups) - higher layers are supposed to know what * they are canceling. */ void ceph_osdc_cancel_request(struct ceph_osd_request *req) { struct ceph_osd_client *osdc = req->r_osdc; mutex_lock(&osdc->request_mutex); if (req->r_linger) __unregister_linger_request(osdc, req); __unregister_request(osdc, req); mutex_unlock(&osdc->request_mutex); dout("%s %p tid %llu canceled\n", __func__, req, req->r_tid); } EXPORT_SYMBOL(ceph_osdc_cancel_request); /* * wait for a request to complete */ int ceph_osdc_wait_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { int rc; dout("%s %p tid %llu\n", __func__, req, req->r_tid); rc = wait_for_completion_interruptible(&req->r_completion); if (rc < 0) { dout("%s %p tid %llu interrupted\n", __func__, req, req->r_tid); ceph_osdc_cancel_request(req); /* kludge - need to to wake ceph_osdc_sync() */ complete_all(&req->r_safe_completion); return rc; } dout("%s %p tid %llu result %d\n", __func__, req, req->r_tid, req->r_result); return req->r_result; } 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 ceph_osd_request *req; u64 last_tid, next_tid = 0; mutex_lock(&osdc->request_mutex); last_tid = osdc->last_tid; while (1) { req = __lookup_request_ge(osdc, next_tid); if (!req) break; if (req->r_tid > last_tid) break; next_tid = req->r_tid + 1; if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0) continue; ceph_osdc_get_request(req); mutex_unlock(&osdc->request_mutex); dout("sync waiting on tid %llu (last is %llu)\n", req->r_tid, last_tid); wait_for_completion(&req->r_safe_completion); mutex_lock(&osdc->request_mutex); ceph_osdc_put_request(req); } mutex_unlock(&osdc->request_mutex); dout("sync done (thru tid %llu)\n", last_tid); } EXPORT_SYMBOL(ceph_osdc_sync); /* * 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) { flush_workqueue(osdc->notify_wq); } EXPORT_SYMBOL(ceph_osdc_flush_notifies); /* * 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->map_sem); mutex_init(&osdc->request_mutex); osdc->last_tid = 0; osdc->osds = RB_ROOT; INIT_LIST_HEAD(&osdc->osd_lru); osdc->requests = RB_ROOT; INIT_LIST_HEAD(&osdc->req_lru); INIT_LIST_HEAD(&osdc->req_unsent); INIT_LIST_HEAD(&osdc->req_notarget); INIT_LIST_HEAD(&osdc->req_linger); osdc->num_requests = 0; INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout); INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout); spin_lock_init(&osdc->event_lock); osdc->event_tree = RB_ROOT; osdc->event_count = 0; err = -ENOMEM; osdc->osdmap = ceph_osdmap_alloc(); if (!osdc->osdmap) goto out; osdc->req_mempool = mempool_create_slab_pool(10, ceph_osd_request_cache); if (!osdc->req_mempool) goto out_map; err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, PAGE_SIZE, 10, true, "osd_op"); if (err < 0) goto out_mempool; err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, PAGE_SIZE, 10, true, "osd_op_reply"); if (err < 0) goto out_msgpool; err = -ENOMEM; osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify"); if (!osdc->notify_wq) goto out_msgpool_reply; schedule_delayed_work(&osdc->timeout_work, osdc->client->options->osd_keepalive_timeout); schedule_delayed_work(&osdc->osds_timeout_work, round_jiffies_relative(osdc->client->options->osd_idle_ttl)); return 0; out_msgpool_reply: ceph_msgpool_destroy(&osdc->msgpool_op_reply); out_msgpool: ceph_msgpool_destroy(&osdc->msgpool_op); out_mempool: mempool_destroy(osdc->req_mempool); out_map: ceph_osdmap_destroy(osdc->osdmap); out: return err; } void ceph_osdc_stop(struct ceph_osd_client *osdc) { flush_workqueue(osdc->notify_wq); destroy_workqueue(osdc->notify_wq); cancel_delayed_work_sync(&osdc->timeout_work); cancel_delayed_work_sync(&osdc->osds_timeout_work); mutex_lock(&osdc->request_mutex); while (!RB_EMPTY_ROOT(&osdc->osds)) { struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), struct ceph_osd, o_node); remove_osd(osdc, osd); } mutex_unlock(&osdc->request_mutex); ceph_osdmap_destroy(osdc->osdmap); mempool_destroy(osdc->req_mempool); ceph_msgpool_destroy(&osdc->msgpool_op); ceph_msgpool_destroy(&osdc->msgpool_op_reply); } /* * Read some contiguous pages. If we cross a stripe boundary, shorten * *plen. Return number of bytes read, or error. */ int ceph_osdc_readpages(struct ceph_osd_client *osdc, struct ceph_vino vino, struct ceph_file_layout *layout, u64 off, u64 *plen, u32 truncate_seq, u64 truncate_size, struct page **pages, int num_pages, int page_align) { struct ceph_osd_request *req; int rc = 0; dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino, vino.snap, off, *plen); req = ceph_osdc_new_request(osdc, layout, vino, off, plen, 0, 1, CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, NULL, truncate_seq, truncate_size, false); if (IS_ERR(req)) return PTR_ERR(req); /* it may be a short read due to an object boundary */ osd_req_op_extent_osd_data_pages(req, 0, pages, *plen, page_align, false, false); dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n", off, *plen, *plen, page_align); rc = ceph_osdc_start_request(osdc, req, false); if (!rc) rc = ceph_osdc_wait_request(osdc, req); ceph_osdc_put_request(req); dout("readpages result %d\n", rc); return rc; } EXPORT_SYMBOL(ceph_osdc_readpages); /* * do a synchronous write on N pages */ int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino, struct ceph_file_layout *layout, struct ceph_snap_context *snapc, u64 off, u64 len, u32 truncate_seq, u64 truncate_size, struct timespec *mtime, struct page **pages, int num_pages) { struct ceph_osd_request *req; int rc = 0; int page_align = off & ~PAGE_MASK; req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 0, 1, CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE, snapc, truncate_seq, truncate_size, true); if (IS_ERR(req)) return PTR_ERR(req); /* it may be a short write due to an object boundary */ osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align, false, false); dout("writepages %llu~%llu (%llu bytes)\n", off, len, len); req->r_mtime = *mtime; rc = ceph_osdc_start_request(osdc, req, true); if (!rc) rc = ceph_osdc_wait_request(osdc, req); ceph_osdc_put_request(req); if (rc == 0) rc = len; dout("writepages result %d\n", rc); return rc; } EXPORT_SYMBOL(ceph_osdc_writepages); int ceph_osdc_setup(void) { size_t size = sizeof(struct ceph_osd_request) + CEPH_OSD_SLAB_OPS * sizeof(struct ceph_osd_req_op); BUG_ON(ceph_osd_request_cache); ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", size, 0, 0, NULL); return ceph_osd_request_cache ? 0 : -ENOMEM; } EXPORT_SYMBOL(ceph_osdc_setup); void ceph_osdc_cleanup(void) { BUG_ON(!ceph_osd_request_cache); kmem_cache_destroy(ceph_osd_request_cache); ceph_osd_request_cache = NULL; } EXPORT_SYMBOL(ceph_osdc_cleanup); /* * handle incoming message */ static void dispatch(struct ceph_connection *con, struct ceph_msg *msg) { struct ceph_osd *osd = con->private; struct ceph_osd_client *osdc; int type = le16_to_cpu(msg->hdr.type); if (!osd) goto out; osdc = osd->o_osdc; switch (type) { case CEPH_MSG_OSD_MAP: ceph_osdc_handle_map(osdc, msg); break; case CEPH_MSG_OSD_OPREPLY: handle_reply(osdc, 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)); } out: ceph_msg_put(msg); } /* * Lookup and return message for incoming reply. Don't try to do * anything about a larger than preallocated data portion of the * message at the moment - for now, just skip the message. */ static struct ceph_msg *get_reply(struct ceph_connection *con, struct ceph_msg_header *hdr, int *skip) { struct ceph_osd *osd = con->private; struct ceph_osd_client *osdc = osd->o_osdc; struct ceph_msg *m; 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; tid = le64_to_cpu(hdr->tid); mutex_lock(&osdc->request_mutex); req = lookup_request(&osdc->requests, tid); if (!req) { dout("%s osd%d tid %llu unknown, skipping\n", __func__, osd->o_osd, tid); m = NULL; *skip = 1; goto out; } 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; ceph_msg_put(req->r_reply); req->r_reply = m; } if (data_len > req->r_reply->data_length) { pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n", __func__, osd->o_osd, req->r_tid, data_len, req->r_reply->data_length); m = NULL; *skip = 1; goto out; } m = ceph_msg_get(req->r_reply); dout("get_reply tid %lld %p\n", tid, m); out: mutex_unlock(&osdc->request_mutex); return m; } static struct ceph_msg *alloc_msg(struct ceph_connection *con, struct ceph_msg_header *hdr, int *skip) { struct ceph_osd *osd = con->private; int type = le16_to_cpu(hdr->type); int front = le32_to_cpu(hdr->front_len); *skip = 0; switch (type) { case CEPH_MSG_OSD_MAP: case CEPH_MSG_WATCH_NOTIFY: return ceph_msg_new(type, front, GFP_NOFS, false); case CEPH_MSG_OSD_OPREPLY: return get_reply(con, hdr, skip); default: pr_info("alloc_msg unexpected msg type %d from osd%d\n", type, osd->o_osd); *skip = 1; return NULL; } } /* * Wrappers to refcount containing ceph_osd struct */ static struct ceph_connection *get_osd_con(struct ceph_connection *con) { struct ceph_osd *osd = con->private; if (get_osd(osd)) return con; return NULL; } static void put_osd_con(struct ceph_connection *con) { struct ceph_osd *osd = con->private; put_osd(osd); } /* * authentication */ /* * Note: returned pointer is the address of a structure that's * managed separately. Caller must *not* attempt to free it. */ static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con, int *proto, int force_new) { struct ceph_osd *o = con->private; struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; struct ceph_auth_handshake *auth = &o->o_auth; if (force_new && auth->authorizer) { ceph_auth_destroy_authorizer(auth->authorizer); auth->authorizer = NULL; } if (!auth->authorizer) { int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD, auth); if (ret) return ERR_PTR(ret); } else { int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD, auth); if (ret) return ERR_PTR(ret); } *proto = ac->protocol; return auth; } static int verify_authorizer_reply(struct ceph_connection *con, int len) { struct ceph_osd *o = con->private; struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len); } static int invalidate_authorizer(struct ceph_connection *con) { struct ceph_osd *o = con->private; struct ceph_osd_client *osdc = o->o_osdc; struct ceph_auth_client *ac = osdc->client->monc.auth; ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD); return ceph_monc_validate_auth(&osdc->client->monc); } static int osd_sign_message(struct ceph_msg *msg) { struct ceph_osd *o = msg->con->private; struct ceph_auth_handshake *auth = &o->o_auth; return ceph_auth_sign_message(auth, msg); } static int osd_check_message_signature(struct ceph_msg *msg) { struct ceph_osd *o = msg->con->private; struct ceph_auth_handshake *auth = &o->o_auth; return ceph_auth_check_message_signature(auth, msg); } static const struct ceph_connection_operations osd_con_ops = { .get = get_osd_con, .put = put_osd_con, .dispatch = dispatch, .get_authorizer = get_authorizer, .verify_authorizer_reply = verify_authorizer_reply, .invalidate_authorizer = invalidate_authorizer, .alloc_msg = alloc_msg, .sign_message = osd_sign_message, .check_message_signature = osd_check_message_signature, .fault = osd_reset, };