#include <linux/ceph/ceph_debug.h> #include <linux/module.h> #include <linux/err.h> #include <linux/highmem.h> #include <linux/mm.h> #include <linux/pagemap.h> #include <linux/slab.h> #include <linux/uaccess.h> #ifdef CONFIG_BLOCK #include <linux/bio.h> #endif #include <linux/ceph/libceph.h> #include <linux/ceph/osd_client.h> #include <linux/ceph/messenger.h> #include <linux/ceph/decode.h> #include <linux/ceph/auth.h> #include <linux/ceph/pagelist.h> #define OSD_OP_FRONT_LEN 4096 #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_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req); static void __send_request(struct ceph_osd_client *osdc, 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) \ ({ \ 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); struct ceph_osd_data * osd_req_op_cls_response_data(struct ceph_osd_request *osd_req, unsigned int which) { return osd_req_op_data(osd_req, which, cls, response_data); } EXPORT_SYMBOL(osd_req_op_cls_response_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); } 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); } 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: 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; default: break; } } /* * requests */ void ceph_osdc_release_request(struct kref *kref) { struct ceph_osd_request *req; unsigned int which; req = container_of(kref, struct ceph_osd_request, r_kref); 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); ceph_put_snap_context(req->r_snapc); if (req->r_mempool) mempool_free(req, req->r_osdc->req_mempool); else kmem_cache_free(ceph_osd_request_cache, req); } EXPORT_SYMBOL(ceph_osdc_release_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; struct ceph_msg *msg; size_t msg_size; BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX); BUG_ON(num_ops > CEPH_OSD_MAX_OP); msg_size = 4 + 4 + 8 + 8 + 4+8; msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */ msg_size += 1 + 8 + 4 + 4; /* pg_t */ msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */ msg_size += 2 + num_ops*sizeof(struct ceph_osd_op); msg_size += 8; /* snapid */ msg_size += 8; /* snap_seq */ msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */ msg_size += 4; if (use_mempool) { req = mempool_alloc(osdc->req_mempool, gfp_flags); memset(req, 0, sizeof(*req)); } else { req = kmem_cache_zalloc(ceph_osd_request_cache, gfp_flags); } if (req == NULL) return NULL; req->r_osdc = osdc; req->r_mempool = use_mempool; req->r_num_ops = num_ops; 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); INIT_LIST_HEAD(&req->r_req_lru_item); INIT_LIST_HEAD(&req->r_osd_item); req->r_base_oloc.pool = -1; req->r_target_oloc.pool = -1; /* create reply message */ if (use_mempool) msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0); else msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, OSD_OPREPLY_FRONT_LEN, gfp_flags, true); if (!msg) { ceph_osdc_put_request(req); return NULL; } req->r_reply = msg; /* create request message; allow space for oid */ if (use_mempool) msg = ceph_msgpool_get(&osdc->msgpool_op, 0); else msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true); if (!msg) { ceph_osdc_put_request(req); return NULL; } memset(msg->front.iov_base, 0, msg->front.iov_len); req->r_request = msg; return req; } EXPORT_SYMBOL(ceph_osdc_alloc_request); static bool osd_req_opcode_valid(u16 opcode) { switch (opcode) { case CEPH_OSD_OP_READ: case CEPH_OSD_OP_STAT: case CEPH_OSD_OP_MAPEXT: case CEPH_OSD_OP_MASKTRUNC: case CEPH_OSD_OP_SPARSE_READ: case CEPH_OSD_OP_NOTIFY: case CEPH_OSD_OP_NOTIFY_ACK: case CEPH_OSD_OP_ASSERT_VER: case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_WRITEFULL: case CEPH_OSD_OP_TRUNCATE: case CEPH_OSD_OP_ZERO: case CEPH_OSD_OP_DELETE: case CEPH_OSD_OP_APPEND: case CEPH_OSD_OP_STARTSYNC: case CEPH_OSD_OP_SETTRUNC: case CEPH_OSD_OP_TRIMTRUNC: case CEPH_OSD_OP_TMAPUP: case CEPH_OSD_OP_TMAPPUT: case CEPH_OSD_OP_TMAPGET: case CEPH_OSD_OP_CREATE: case CEPH_OSD_OP_ROLLBACK: case CEPH_OSD_OP_WATCH: case CEPH_OSD_OP_OMAPGETKEYS: case CEPH_OSD_OP_OMAPGETVALS: case CEPH_OSD_OP_OMAPGETHEADER: case CEPH_OSD_OP_OMAPGETVALSBYKEYS: case CEPH_OSD_OP_OMAPSETVALS: case CEPH_OSD_OP_OMAPSETHEADER: case CEPH_OSD_OP_OMAPCLEAR: case CEPH_OSD_OP_OMAPRMKEYS: case CEPH_OSD_OP_OMAP_CMP: case CEPH_OSD_OP_SETALLOCHINT: case CEPH_OSD_OP_CLONERANGE: case CEPH_OSD_OP_ASSERT_SRC_VERSION: case CEPH_OSD_OP_SRC_CMPXATTR: case CEPH_OSD_OP_GETXATTR: case CEPH_OSD_OP_GETXATTRS: case CEPH_OSD_OP_CMPXATTR: case CEPH_OSD_OP_SETXATTR: case CEPH_OSD_OP_SETXATTRS: case CEPH_OSD_OP_RESETXATTRS: case CEPH_OSD_OP_RMXATTR: case CEPH_OSD_OP_PULL: case CEPH_OSD_OP_PUSH: case CEPH_OSD_OP_BALANCEREADS: case CEPH_OSD_OP_UNBALANCEREADS: case CEPH_OSD_OP_SCRUB: case CEPH_OSD_OP_SCRUB_RESERVE: case CEPH_OSD_OP_SCRUB_UNRESERVE: case CEPH_OSD_OP_SCRUB_STOP: case CEPH_OSD_OP_SCRUB_MAP: case CEPH_OSD_OP_WRLOCK: case CEPH_OSD_OP_WRUNLOCK: case CEPH_OSD_OP_RDLOCK: case CEPH_OSD_OP_RDUNLOCK: case CEPH_OSD_OP_UPLOCK: case CEPH_OSD_OP_DNLOCK: case CEPH_OSD_OP_CALL: case CEPH_OSD_OP_PGLS: case CEPH_OSD_OP_PGLS_FILTER: return true; 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) { 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; return op; } void osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which, u16 opcode) { (void)_osd_req_op_init(osd_req, which, opcode); } EXPORT_SYMBOL(osd_req_op_init); 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); size_t payload_len = 0; BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); op->extent.offset = offset; op->extent.length = length; op->extent.truncate_size = truncate_size; op->extent.truncate_seq = truncate_seq; if (opcode == CEPH_OSD_OP_WRITE) payload_len += length; op->payload_len = payload_len; } EXPORT_SYMBOL(osd_req_op_extent_init); 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->payload_len -= previous - length; } EXPORT_SYMBOL(osd_req_op_extent_update); 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); 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->cls.argc = 0; /* currently unused */ op->payload_len = payload_len; } EXPORT_SYMBOL(osd_req_op_cls_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); 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); 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 u64 osd_req_encode_op(struct ceph_osd_request *req, struct ceph_osd_op *dst, unsigned int which) { struct ceph_osd_req_op *src; struct ceph_osd_data *osd_data; u64 request_data_len = 0; u64 data_length; BUG_ON(which >= req->r_num_ops); src = &req->r_ops[which]; 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: osd_data = &src->raw_data_in; ceph_osdc_msg_data_add(req->r_reply, osd_data); break; case CEPH_OSD_OP_READ: case CEPH_OSD_OP_WRITE: case CEPH_OSD_OP_ZERO: case CEPH_OSD_OP_DELETE: case CEPH_OSD_OP_TRUNCATE: if (src->op == CEPH_OSD_OP_WRITE) request_data_len = src->extent.length; 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); osd_data = &src->extent.osd_data; if (src->op == CEPH_OSD_OP_WRITE) ceph_osdc_msg_data_add(req->r_request, osd_data); else ceph_osdc_msg_data_add(req->r_reply, osd_data); break; case CEPH_OSD_OP_CALL: dst->cls.class_len = src->cls.class_len; dst->cls.method_len = src->cls.method_len; osd_data = &src->cls.request_info; ceph_osdc_msg_data_add(req->r_request, osd_data); BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST); request_data_len = osd_data->pagelist->length; osd_data = &src->cls.request_data; data_length = ceph_osd_data_length(osd_data); if (data_length) { BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE); dst->cls.indata_len = cpu_to_le32(data_length); ceph_osdc_msg_data_add(req->r_request, osd_data); src->payload_len += data_length; request_data_len += data_length; } osd_data = &src->cls.response_data; ceph_osdc_msg_data_add(req->r_reply, osd_data); 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; 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->payload_len); return request_data_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, 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; u32 object_size; u64 object_base; int r; BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE && opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE); req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool, GFP_NOFS); if (!req) return ERR_PTR(-ENOMEM); req->r_flags = flags; /* calculate max write size */ r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen); if (r < 0) { ceph_osdc_put_request(req); return ERR_PTR(r); } object_size = le32_to_cpu(layout->fl_object_size); 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, 0, opcode, objoff, objlen, truncate_size, truncate_seq); /* * A second op in the ops array means the caller wants to * also issue a include a 'startsync' command so that the * osd will flush data quickly. */ if (num_ops > 1) osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC); req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout); snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name), "%llx.%08llx", vino.ino, objnum); req->r_base_oid.name_len = strlen(req->r_base_oid.name); return req; } EXPORT_SYMBOL(ceph_osdc_new_request); /* * We keep osd requests in an rbtree, sorted by ->r_tid. */ static void __insert_request(struct ceph_osd_client *osdc, struct ceph_osd_request *new) { struct rb_node **p = &osdc->requests.rb_node; struct rb_node *parent = NULL; struct ceph_osd_request *req = NULL; while (*p) { parent = *p; req = rb_entry(parent, struct ceph_osd_request, r_node); if (new->r_tid < req->r_tid) p = &(*p)->rb_left; else if (new->r_tid > req->r_tid) p = &(*p)->rb_right; else BUG(); } rb_link_node(&new->r_node, parent, p); rb_insert_color(&new->r_node, &osdc->requests); } static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc, u64 tid) { struct ceph_osd_request *req; struct rb_node *n = osdc->requests.rb_node; while (n) { req = rb_entry(n, struct ceph_osd_request, r_node); if (tid < req->r_tid) n = n->rb_left; else if (tid > req->r_tid) n = n->rb_right; else return req; } return NULL; } static struct ceph_osd_request * __lookup_request_ge(struct ceph_osd_client *osdc, u64 tid) { struct ceph_osd_request *req; struct rb_node *n = osdc->requests.rb_node; while (n) { req = rb_entry(n, struct ceph_osd_request, r_node); if (tid < req->r_tid) { if (!n->rb_left) return req; n = n->rb_left; } else if (tid > req->r_tid) { n = n->rb_right; } else { return req; } } return NULL; } /* * 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); int err; dout("__kick_osd_requests osd%d\n", 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; list_move_tail(&req->r_req_lru_item, &resend); dout("requeueing %p tid %llu osd%d\n", req, req->r_tid, osd->o_osd); if (!req->r_linger) req->r_flags |= CEPH_OSD_FLAG_RETRY; } list_splice(&resend, &osdc->req_unsent); /* * Linger requests are re-registered before sending, which * sets up a new tid for each. We add them to the unsent * list at the end to keep things in tid order. */ list_for_each_entry_safe(req, nreq, &osd->o_linger_requests, r_linger_osd) { /* * reregister request prior to unregistering linger so * that r_osd is preserved. */ BUG_ON(!list_empty(&req->r_req_lru_item)); __register_request(osdc, req); list_add_tail(&req->r_req_lru_item, &osdc->req_unsent); list_add_tail(&req->r_osd_item, &req->r_osd->o_requests); __unregister_linger_request(osdc, req); dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid, osd->o_osd); } } /* * 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); } /* * Track open sessions with osds. */ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) { struct ceph_osd *osd; osd = kzalloc(sizeof(*osd), GFP_NOFS); if (!osd) return NULL; atomic_set(&osd->o_ref, 1); osd->o_osdc = osdc; osd->o_osd = onum; 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); osd->o_incarnation = 1; ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); INIT_LIST_HEAD(&osd->o_keepalive_item); 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->o_auth.authorizer) { struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth; ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer); kfree(osd); } } /* * remove an osd from our map */ static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("__remove_osd %p\n", osd); BUG_ON(!list_empty(&osd->o_requests)); rb_erase(&osd->o_node, &osdc->osds); list_del_init(&osd->o_osd_lru); ceph_con_close(&osd->o_con); put_osd(osd); } static void remove_all_osds(struct ceph_osd_client *osdc) { dout("%s %p\n", __func__, osdc); 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); } static void __move_osd_to_lru(struct ceph_osd_client *osdc, struct ceph_osd *osd) { dout("__move_osd_to_lru %p\n", 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 * HZ; } 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); } static void remove_old_osds(struct ceph_osd_client *osdc) { struct ceph_osd *osd, *nosd; dout("__remove_old_osds %p\n", osdc); mutex_lock(&osdc->request_mutex); list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) { if (time_before(jiffies, osd->lru_ttl)) break; __remove_osd(osdc, osd); } mutex_unlock(&osdc->request_mutex); } /* * 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; } static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new) { struct rb_node **p = &osdc->osds.rb_node; struct rb_node *parent = NULL; struct ceph_osd *osd = NULL; dout("__insert_osd %p osd%d\n", new, new->o_osd); while (*p) { parent = *p; osd = rb_entry(parent, struct ceph_osd, o_node); if (new->o_osd < osd->o_osd) p = &(*p)->rb_left; else if (new->o_osd > osd->o_osd) p = &(*p)->rb_right; else BUG(); } rb_link_node(&new->o_node, parent, p); rb_insert_color(&new->o_node, &osdc->osds); } static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o) { struct ceph_osd *osd; struct rb_node *n = osdc->osds.rb_node; while (n) { osd = rb_entry(n, struct ceph_osd, o_node); if (o < osd->o_osd) n = n->rb_left; else if (o > osd->o_osd) n = n->rb_right; else return osd; } return NULL; } static void __schedule_osd_timeout(struct ceph_osd_client *osdc) { schedule_delayed_work(&osdc->timeout_work, osdc->client->options->osd_keepalive_timeout * HZ); } static void __cancel_osd_timeout(struct ceph_osd_client *osdc) { cancel_delayed_work(&osdc->timeout_work); } /* * 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, req); ceph_osdc_get_request(req); osdc->num_requests++; if (osdc->num_requests == 1) { dout(" first request, scheduling timeout\n"); __schedule_osd_timeout(osdc); } } /* * 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); rb_erase(&req->r_node, &osdc->requests); 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); if (list_empty(&req->r_osd->o_requests) && list_empty(&req->r_osd->o_linger_requests)) { dout("moving osd to %p lru\n", req->r_osd); __move_osd_to_lru(osdc, req->r_osd); } if (list_empty(&req->r_linger_item)) req->r_osd = NULL; } list_del_init(&req->r_req_lru_item); ceph_osdc_put_request(req); if (osdc->num_requests == 0) { dout(" no requests, canceling timeout\n"); __cancel_osd_timeout(osdc); } } /* * 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("__register_linger_request %p\n", req); 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, &req->r_osd->o_linger_requests); } static void __unregister_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { dout("__unregister_linger_request %p\n", req); list_del_init(&req->r_linger_item); if (req->r_osd) { list_del_init(&req->r_linger_osd); if (list_empty(&req->r_osd->o_requests) && list_empty(&req->r_osd->o_linger_requests)) { dout("moving osd to %p lru\n", req->r_osd); __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_unregister_linger_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { mutex_lock(&osdc->request_mutex); if (req->r_linger) { req->r_linger = 0; __unregister_linger_request(osdc, req); } mutex_unlock(&osdc->request_mutex); } EXPORT_SYMBOL(ceph_osdc_unregister_linger_request); 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); /* * Returns whether a request should be blocked from being sent * based on the current osdmap and osd_client settings. * * Caller should hold map_sem for read. */ static bool __req_should_be_paused(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD); bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) || (req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr); } /* * Calculate mapping of a request to a PG. Takes tiering into account. */ static int __calc_request_pg(struct ceph_osdmap *osdmap, struct ceph_osd_request *req, struct ceph_pg *pg_out) { bool need_check_tiering; need_check_tiering = false; if (req->r_target_oloc.pool == -1) { req->r_target_oloc = req->r_base_oloc; /* struct */ need_check_tiering = true; } if (req->r_target_oid.name_len == 0) { ceph_oid_copy(&req->r_target_oid, &req->r_base_oid); need_check_tiering = true; } if (need_check_tiering && (req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) { struct ceph_pg_pool_info *pi; pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool); if (pi) { if ((req->r_flags & CEPH_OSD_FLAG_READ) && pi->read_tier >= 0) req->r_target_oloc.pool = pi->read_tier; if ((req->r_flags & CEPH_OSD_FLAG_WRITE) && pi->write_tier >= 0) req->r_target_oloc.pool = pi->write_tier; } /* !pi is caught in ceph_oloc_oid_to_pg() */ } return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc, &req->r_target_oid, pg_out); } /* * 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) { struct ceph_pg pgid; int acting[CEPH_PG_MAX_SIZE]; int num, o; int err; bool was_paused; dout("map_request %p tid %lld\n", req, req->r_tid); err = __calc_request_pg(osdc->osdmap, req, &pgid); if (err) { list_move(&req->r_req_lru_item, &osdc->req_notarget); return err; } req->r_pgid = pgid; num = ceph_calc_pg_acting(osdc->osdmap, pgid, acting, &o); if (num < 0) num = 0; was_paused = req->r_paused; req->r_paused = __req_should_be_paused(osdc, req); if (was_paused && !req->r_paused) force_resend = 1; if ((!force_resend && req->r_osd && req->r_osd->o_osd == o && req->r_sent >= req->r_osd->o_incarnation && req->r_num_pg_osds == num && memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) || (req->r_osd == NULL && o == -1) || req->r_paused) return 0; /* no change */ dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n", req->r_tid, pgid.pool, pgid.seed, o, req->r_osd ? req->r_osd->o_osd : -1); /* record full pg acting set */ memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num); req->r_num_pg_osds = num; if (req->r_osd) { __cancel_request(req); list_del_init(&req->r_osd_item); req->r_osd = NULL; } req->r_osd = __lookup_osd(osdc, o); if (!req->r_osd && o >= 0) { err = -ENOMEM; req->r_osd = create_osd(osdc, o); 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, o); __insert_osd(osdc, req->r_osd); ceph_con_open(&req->r_osd->o_con, CEPH_ENTITY_TYPE_OSD, o, &osdc->osdmap->osd_addr[o]); } 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); } err = 1; /* osd or pg changed */ out: return err; } /* * caller should hold map_sem (for read) and request_mutex */ static void __send_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { void *p; dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n", req, req->r_tid, req->r_osd->o_osd, req->r_flags, (unsigned long long)req->r_pgid.pool, req->r_pgid.seed); /* fill in message content that changes each time we send it */ put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch); put_unaligned_le32(req->r_flags, req->r_request_flags); put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool); p = req->r_request_pgid; ceph_encode_64(&p, req->r_pgid.pool); ceph_encode_32(&p, req->r_pgid.seed); put_unaligned_le64(1, req->r_request_attempts); /* FIXME */ memcpy(req->r_request_reassert_version, &req->r_reassert_version, sizeof(req->r_reassert_version)); req->r_stamp = jiffies; list_move_tail(&req->r_req_lru_item, &osdc->req_lru); ceph_msg_get(req->r_request); /* send consumes a ref */ req->r_sent = req->r_osd->o_incarnation; ceph_con_send(&req->r_osd->o_con, 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) __send_request(osdc, req); } /* * 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; } /* * Timeout callback, called every N seconds when 1 or more osd * requests has been active for more than N seconds. When this * happens, we ping all OSDs with requests who have timed out to * ensure any communications channel reset is detected. Reset the * request timeouts another N seconds in the future as we go. * Reschedule the timeout event another N seconds in future (unless * there are no open requests). */ static void handle_timeout(struct work_struct *work) { struct ceph_osd_client *osdc = container_of(work, struct ceph_osd_client, timeout_work.work); struct ceph_osd_request *req; struct ceph_osd *osd; unsigned long keepalive = osdc->client->options->osd_keepalive_timeout * HZ; 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 + keepalive)) 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); } __schedule_osd_timeout(osdc); __send_queued(osdc); mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); } 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 * HZ >> 2; dout("osds timeout\n"); down_read(&osdc->map_sem); remove_old_osds(osdc); 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; } static void complete_request(struct ceph_osd_request *req) { complete_all(&req->r_safe_completion); /* fsync waiter */ } /* * handle osd op reply. either call the callback if it is specified, * or do the completion to wake up the waiting thread. */ static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg, struct ceph_connection *con) { void *p, *end; struct ceph_osd_request *req; struct ceph_request_redirect redir; u64 tid; int object_len; unsigned int numops; int payload_len, flags; s32 result; s32 retry_attempt; struct ceph_pg pg; int err; u32 reassert_epoch; u64 reassert_version; u32 osdmap_epoch; int already_completed; u32 bytes; unsigned int i; tid = le64_to_cpu(msg->hdr.tid); dout("handle_reply %p tid %llu\n", msg, tid); p = msg->front.iov_base; end = p + msg->front.iov_len; ceph_decode_need(&p, end, 4, bad); object_len = ceph_decode_32(&p); ceph_decode_need(&p, end, object_len, bad); p += object_len; err = ceph_decode_pgid(&p, end, &pg); if (err) goto bad; ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad); flags = ceph_decode_64(&p); result = ceph_decode_32(&p); reassert_epoch = ceph_decode_32(&p); reassert_version = ceph_decode_64(&p); osdmap_epoch = ceph_decode_32(&p); /* lookup */ down_read(&osdc->map_sem); mutex_lock(&osdc->request_mutex); req = __lookup_request(osdc, tid); if (req == NULL) { dout("handle_reply tid %llu dne\n", tid); goto bad_mutex; } ceph_osdc_get_request(req); dout("handle_reply %p tid %llu req %p result %d\n", msg, tid, req, result); ceph_decode_need(&p, end, 4, bad_put); numops = ceph_decode_32(&p); if (numops > CEPH_OSD_MAX_OP) goto bad_put; if (numops != req->r_num_ops) goto bad_put; payload_len = 0; ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put); for (i = 0; i < numops; i++) { struct ceph_osd_op *op = p; int len; len = le32_to_cpu(op->payload_len); req->r_reply_op_len[i] = len; dout(" op %d has %d bytes\n", i, len); payload_len += len; p += sizeof(*op); } bytes = le32_to_cpu(msg->hdr.data_len); if (payload_len != bytes) { pr_warning("sum of op payload lens %d != data_len %d", payload_len, bytes); goto bad_put; } ceph_decode_need(&p, end, 4 + numops * 4, bad_put); retry_attempt = ceph_decode_32(&p); for (i = 0; i < numops; i++) req->r_reply_op_result[i] = ceph_decode_32(&p); if (le16_to_cpu(msg->hdr.version) >= 6) { p += 8 + 4; /* skip replay_version */ p += 8; /* skip user_version */ err = ceph_redirect_decode(&p, end, &redir); if (err) goto bad_put; } else { redir.oloc.pool = -1; } if (redir.oloc.pool != -1) { dout("redirect pool %lld\n", redir.oloc.pool); __unregister_request(osdc, req); req->r_target_oloc = redir.oloc; /* struct */ /* * Start redirect requests with nofail=true. If * mapping fails, request will end up on the notarget * list, waiting for the new osdmap (which can take * a while), even though the original request mapped * successfully. In the future we might want to follow * original request's nofail setting here. */ err = __ceph_osdc_start_request(osdc, req, true); BUG_ON(err); goto out_unlock; } already_completed = req->r_got_reply; if (!req->r_got_reply) { req->r_result = result; dout("handle_reply result %d bytes %d\n", req->r_result, bytes); if (req->r_result == 0) req->r_result = bytes; /* in case this is a write and we need to replay, */ req->r_reassert_version.epoch = cpu_to_le32(reassert_epoch); req->r_reassert_version.version = cpu_to_le64(reassert_version); req->r_got_reply = 1; } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) { dout("handle_reply tid %llu dup ack\n", tid); goto out_unlock; } dout("handle_reply tid %llu flags %d\n", tid, flags); if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK)) __register_linger_request(osdc, req); /* either this is a read, or we got the safe response */ if (result < 0 || (flags & CEPH_OSD_FLAG_ONDISK) || ((flags & CEPH_OSD_FLAG_WRITE) == 0)) __unregister_request(osdc, req); mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); if (!already_completed) { if (req->r_unsafe_callback && result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK)) req->r_unsafe_callback(req, true); if (req->r_callback) req->r_callback(req, msg); else complete_all(&req->r_completion); } if (flags & CEPH_OSD_FLAG_ONDISK) { if (req->r_unsafe_callback && already_completed) req->r_unsafe_callback(req, false); complete_request(req); } out: dout("req=%p req->r_linger=%d\n", req, req->r_linger); ceph_osdc_put_request(req); return; out_unlock: mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); goto out; bad_put: req->r_result = -EIO; __unregister_request(osdc, req); if (req->r_callback) req->r_callback(req, msg); else complete_all(&req->r_completion); complete_request(req); ceph_osdc_put_request(req); bad_mutex: mutex_unlock(&osdc->request_mutex); up_read(&osdc->map_sem); bad: pr_err("corrupt osd_op_reply got %d %d\n", (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len)); ceph_msg_dump(msg); } static void reset_changed_osds(struct ceph_osd_client *osdc) { struct rb_node *p, *n; 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; /* no change and no osd was specified */ if (err < 0) continue; /* hrm! */ if (req->r_osd == NULL) { dout("tid %llu maps to no valid osd\n", req->r_tid); needmap++; /* request a newer map */ continue; } 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); } } /* * Process updated osd map. * * The message contains any number of incremental and full maps, normally * indicating some sort of topology change in the cluster. Kick requests * off to different OSDs as needed. */ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) { void *p, *end, *next; u32 nr_maps, maplen; u32 epoch; struct ceph_osdmap *newmap = NULL, *oldmap; int err; struct ceph_fsid fsid; bool was_full; dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0); p = msg->front.iov_base; end = p + msg->front.iov_len; /* verify fsid */ ceph_decode_need(&p, end, sizeof(fsid), bad); ceph_decode_copy(&p, &fsid, sizeof(fsid)); if (ceph_check_fsid(osdc->client, &fsid) < 0) return; down_write(&osdc->map_sem); was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); /* 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); next = p + maplen; if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) { dout("applying incremental map %u len %d\n", epoch, maplen); newmap = osdmap_apply_incremental(&p, next, osdc->osdmap, &osdc->client->msgr); if (IS_ERR(newmap)) { err = PTR_ERR(newmap); goto bad; } BUG_ON(!newmap); if (newmap != osdc->osdmap) { ceph_osdmap_destroy(osdc->osdmap); osdc->osdmap = newmap; } was_full = was_full || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); kick_requests(osdc, 0, was_full); } else { dout("ignoring incremental map %u len %d\n", epoch, maplen); } p = next; nr_maps--; } if (newmap) goto done; /* full maps */ ceph_decode_32_safe(&p, end, nr_maps, bad); dout(" %d full maps\n", nr_maps); while (nr_maps) { ceph_decode_need(&p, end, 2*sizeof(u32), bad); 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 && osdc->osdmap->epoch >= epoch) { dout("skipping full map %u len %d, " "older than our %u\n", epoch, maplen, osdc->osdmap->epoch); } else { int skipped_map = 0; dout("taking full map %u len %d\n", epoch, maplen); newmap = ceph_osdmap_decode(&p, p+maplen); if (IS_ERR(newmap)) { err = PTR_ERR(newmap); goto bad; } BUG_ON(!newmap); oldmap = osdc->osdmap; osdc->osdmap = newmap; if (oldmap) { if (oldmap->epoch + 1 < newmap->epoch) skipped_map = 1; ceph_osdmap_destroy(oldmap); } was_full = was_full || ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL); kick_requests(osdc, skipped_map, was_full); } p += maplen; nr_maps--; } if (!osdc->osdmap) goto bad; done: downgrade_write(&osdc->map_sem); ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch); /* * subscribe to subsequent osdmap updates if full to ensure * we find out when we are no longer full and stop returning * ENOSPC. */ 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)) ceph_monc_request_next_osdmap(&osdc->client->monc); mutex_lock(&osdc->request_mutex); __send_queued(osdc); mutex_unlock(&osdc->request_mutex); up_read(&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) { dout("ERROR: could not allocate event_work\n"); goto done_err; } 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; if (!queue_work(osdc->notify_wq, &event_work->work)) { dout("WARNING: failed to queue notify event work\n"); goto done_err; } } return; done_err: ceph_osdc_put_event(event); return; bad: pr_err("osdc handle_watch_notify corrupt msg\n"); } /* * build new request AND message * */ void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off, struct ceph_snap_context *snapc, u64 snap_id, struct timespec *mtime) { struct ceph_msg *msg = req->r_request; void *p; size_t msg_size; int flags = req->r_flags; u64 data_len; unsigned int i; req->r_snapid = snap_id; req->r_snapc = ceph_get_snap_context(snapc); /* encode request */ msg->hdr.version = cpu_to_le16(4); p = msg->front.iov_base; ceph_encode_32(&p, 1); /* client_inc is always 1 */ req->r_request_osdmap_epoch = p; p += 4; req->r_request_flags = p; p += 4; if (req->r_flags & CEPH_OSD_FLAG_WRITE) ceph_encode_timespec(p, mtime); p += sizeof(struct ceph_timespec); req->r_request_reassert_version = p; p += sizeof(struct ceph_eversion); /* will get filled in */ /* oloc */ ceph_encode_8(&p, 4); ceph_encode_8(&p, 4); ceph_encode_32(&p, 8 + 4 + 4); req->r_request_pool = p; p += 8; ceph_encode_32(&p, -1); /* preferred */ ceph_encode_32(&p, 0); /* key len */ ceph_encode_8(&p, 1); req->r_request_pgid = p; p += 8 + 4; ceph_encode_32(&p, -1); /* preferred */ /* oid */ ceph_encode_32(&p, req->r_base_oid.name_len); memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len); dout("oid '%.*s' len %d\n", req->r_base_oid.name_len, req->r_base_oid.name, req->r_base_oid.name_len); p += req->r_base_oid.name_len; /* ops--can imply data */ ceph_encode_16(&p, (u16)req->r_num_ops); data_len = 0; for (i = 0; i < req->r_num_ops; i++) { data_len += osd_req_encode_op(req, p, i); p += sizeof(struct ceph_osd_op); } /* snaps */ ceph_encode_64(&p, req->r_snapid); ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0); ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0); if (req->r_snapc) { for (i = 0; i < snapc->num_snaps; i++) { ceph_encode_64(&p, req->r_snapc->snaps[i]); } } req->r_request_attempts = p; p += 4; /* data */ if (flags & CEPH_OSD_FLAG_WRITE) { u16 data_off; /* * The header "data_off" is a hint to the receiver * allowing it to align received data into its * buffers such that there's no need to re-copy * it before writing it to disk (direct I/O). */ data_off = (u16) (off & 0xffff); req->r_request->hdr.data_off = cpu_to_le16(data_off); } req->r_request->hdr.data_len = cpu_to_le32(data_len); BUG_ON(p > msg->front.iov_base + msg->front.iov_len); msg_size = p - msg->front.iov_base; msg->front.iov_len = msg_size; msg->hdr.front_len = cpu_to_le32(msg_size); dout("build_request msg_size was %d\n", (int)msg_size); } EXPORT_SYMBOL(ceph_osdc_build_request); /* * 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); /* * wait for a request to complete */ int ceph_osdc_wait_request(struct ceph_osd_client *osdc, struct ceph_osd_request *req) { int rc; rc = wait_for_completion_interruptible(&req->r_completion); if (rc < 0) { mutex_lock(&osdc->request_mutex); __cancel_request(req); __unregister_request(osdc, req); mutex_unlock(&osdc->request_mutex); complete_request(req); dout("wait_request tid %llu canceled/timed out\n", req->r_tid); return rc; } dout("wait_request tid %llu result %d\n", 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 */ extern 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; osdc->osdmap = NULL; init_rwsem(&osdc->map_sem); init_completion(&osdc->map_waiters); osdc->last_requested_map = 0; mutex_init(&osdc->request_mutex); osdc->last_tid = 0; osdc->osds = RB_ROOT; 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; schedule_delayed_work(&osdc->osds_timeout_work, round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ)); err = -ENOMEM; osdc->req_mempool = mempool_create_kmalloc_pool(10, sizeof(struct ceph_osd_request)); if (!osdc->req_mempool) goto out; err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, OSD_OP_FRONT_LEN, 10, true, "osd_op"); if (err < 0) goto out_mempool; err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, OSD_OPREPLY_FRONT_LEN, 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; 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: 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); if (osdc->osdmap) { ceph_osdmap_destroy(osdc->osdmap); osdc->osdmap = NULL; } remove_all_osds(osdc); 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, 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); ceph_osdc_build_request(req, off, NULL, vino.snap, NULL); 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; BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */ req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 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); ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, 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) { BUG_ON(ceph_osd_request_cache); ceph_osd_request_cache = kmem_cache_create("ceph_osd_request", sizeof (struct ceph_osd_request), __alignof__(struct ceph_osd_request), 0, NULL); return ceph_osd_request_cache ? 0 : -ENOMEM; } EXPORT_SYMBOL(ceph_osdc_setup); void ceph_osdc_cleanup(void) { BUG_ON(!ceph_osd_request_cache); kmem_cache_destroy(ceph_osd_request_cache); ceph_osd_request_cache = NULL; } EXPORT_SYMBOL(ceph_osdc_cleanup); /* * 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, con); 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. set up reply message * pages. */ 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, tid); if (!req) { *skip = 1; m = NULL; dout("get_reply unknown tid %llu from osd%d\n", tid, osd->o_osd); goto out; } if (req->r_reply->con) dout("%s revoking msg %p from old con %p\n", __func__, req->r_reply, req->r_reply->con); ceph_msg_revoke_incoming(req->r_reply); if (front_len > req->r_reply->front_alloc_len) { pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n", front_len, req->r_reply->front_alloc_len, (unsigned int)con->peer_name.type, le64_to_cpu(con->peer_name.num)); 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; } m = ceph_msg_get(req->r_reply); if (data_len > 0) { struct ceph_osd_data *osd_data; /* * XXX This is assuming there is only one op containing * XXX page data. Probably OK for reads, but this * XXX ought to be done more generally. */ osd_data = osd_req_op_extent_osd_data(req, 0); if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) { if (osd_data->pages && unlikely(osd_data->length < data_len)) { pr_warning("tid %lld reply has %d bytes " "we had only %llu bytes ready\n", tid, data_len, osd_data->length); *skip = 1; ceph_msg_put(m); m = NULL; goto out; } } } *skip = 0; 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(ac, 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 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, .fault = osd_reset, };