diff options
Diffstat (limited to 'src/spdk/lib/blobfs/blobfs.c')
| -rw-r--r-- | src/spdk/lib/blobfs/blobfs.c | 2980 |
1 files changed, 2980 insertions, 0 deletions
diff --git a/src/spdk/lib/blobfs/blobfs.c b/src/spdk/lib/blobfs/blobfs.c new file mode 100644 index 000000000..3af6b0639 --- /dev/null +++ b/src/spdk/lib/blobfs/blobfs.c @@ -0,0 +1,2980 @@ +/*- + * BSD LICENSE + * + * Copyright (c) Intel Corporation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "spdk/stdinc.h" + +#include "spdk/blobfs.h" +#include "spdk/conf.h" +#include "tree.h" + +#include "spdk/queue.h" +#include "spdk/thread.h" +#include "spdk/assert.h" +#include "spdk/env.h" +#include "spdk/util.h" +#include "spdk_internal/log.h" +#include "spdk/trace.h" + +#define BLOBFS_TRACE(file, str, args...) \ + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s " str, file->name, ##args) + +#define BLOBFS_TRACE_RW(file, str, args...) \ + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS_RW, "file=%s " str, file->name, ##args) + +#define BLOBFS_DEFAULT_CACHE_SIZE (4ULL * 1024 * 1024 * 1024) +#define SPDK_BLOBFS_DEFAULT_OPTS_CLUSTER_SZ (1024 * 1024) + +#define SPDK_BLOBFS_SIGNATURE "BLOBFS" + +static uint64_t g_fs_cache_size = BLOBFS_DEFAULT_CACHE_SIZE; +static struct spdk_mempool *g_cache_pool; +static TAILQ_HEAD(, spdk_file) g_caches; +static struct spdk_poller *g_cache_pool_mgmt_poller; +static struct spdk_thread *g_cache_pool_thread; +#define BLOBFS_CACHE_POOL_POLL_PERIOD_IN_US 1000ULL +static int g_fs_count = 0; +static pthread_mutex_t g_cache_init_lock = PTHREAD_MUTEX_INITIALIZER; + +#define TRACE_GROUP_BLOBFS 0x7 +#define TRACE_BLOBFS_XATTR_START SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x0) +#define TRACE_BLOBFS_XATTR_END SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x1) +#define TRACE_BLOBFS_OPEN SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x2) +#define TRACE_BLOBFS_CLOSE SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x3) +#define TRACE_BLOBFS_DELETE_START SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x4) +#define TRACE_BLOBFS_DELETE_DONE SPDK_TPOINT_ID(TRACE_GROUP_BLOBFS, 0x5) + +SPDK_TRACE_REGISTER_FN(blobfs_trace, "blobfs", TRACE_GROUP_BLOBFS) +{ + spdk_trace_register_description("BLOBFS_XATTR_START", + TRACE_BLOBFS_XATTR_START, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); + spdk_trace_register_description("BLOBFS_XATTR_END", + TRACE_BLOBFS_XATTR_END, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); + spdk_trace_register_description("BLOBFS_OPEN", + TRACE_BLOBFS_OPEN, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); + spdk_trace_register_description("BLOBFS_CLOSE", + TRACE_BLOBFS_CLOSE, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); + spdk_trace_register_description("BLOBFS_DELETE_START", + TRACE_BLOBFS_DELETE_START, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); + spdk_trace_register_description("BLOBFS_DELETE_DONE", + TRACE_BLOBFS_DELETE_DONE, + OWNER_NONE, OBJECT_NONE, 0, + SPDK_TRACE_ARG_TYPE_STR, + "file: "); +} + +void +cache_buffer_free(struct cache_buffer *cache_buffer) +{ + spdk_mempool_put(g_cache_pool, cache_buffer->buf); + free(cache_buffer); +} + +#define CACHE_READAHEAD_THRESHOLD (128 * 1024) + +struct spdk_file { + struct spdk_filesystem *fs; + struct spdk_blob *blob; + char *name; + uint64_t trace_arg_name; + uint64_t length; + bool is_deleted; + bool open_for_writing; + uint64_t length_flushed; + uint64_t length_xattr; + uint64_t append_pos; + uint64_t seq_byte_count; + uint64_t next_seq_offset; + uint32_t priority; + TAILQ_ENTRY(spdk_file) tailq; + spdk_blob_id blobid; + uint32_t ref_count; + pthread_spinlock_t lock; + struct cache_buffer *last; + struct cache_tree *tree; + TAILQ_HEAD(open_requests_head, spdk_fs_request) open_requests; + TAILQ_HEAD(sync_requests_head, spdk_fs_request) sync_requests; + TAILQ_ENTRY(spdk_file) cache_tailq; +}; + +struct spdk_deleted_file { + spdk_blob_id id; + TAILQ_ENTRY(spdk_deleted_file) tailq; +}; + +struct spdk_filesystem { + struct spdk_blob_store *bs; + TAILQ_HEAD(, spdk_file) files; + struct spdk_bs_opts bs_opts; + struct spdk_bs_dev *bdev; + fs_send_request_fn send_request; + + struct { + uint32_t max_ops; + struct spdk_io_channel *sync_io_channel; + struct spdk_fs_channel *sync_fs_channel; + } sync_target; + + struct { + uint32_t max_ops; + struct spdk_io_channel *md_io_channel; + struct spdk_fs_channel *md_fs_channel; + } md_target; + + struct { + uint32_t max_ops; + } io_target; +}; + +struct spdk_fs_cb_args { + union { + spdk_fs_op_with_handle_complete fs_op_with_handle; + spdk_fs_op_complete fs_op; + spdk_file_op_with_handle_complete file_op_with_handle; + spdk_file_op_complete file_op; + spdk_file_stat_op_complete stat_op; + } fn; + void *arg; + sem_t *sem; + struct spdk_filesystem *fs; + struct spdk_file *file; + int rc; + struct iovec *iovs; + uint32_t iovcnt; + struct iovec iov; + union { + struct { + TAILQ_HEAD(, spdk_deleted_file) deleted_files; + } fs_load; + struct { + uint64_t length; + } truncate; + struct { + struct spdk_io_channel *channel; + void *pin_buf; + int is_read; + off_t offset; + size_t length; + uint64_t start_lba; + uint64_t num_lba; + uint32_t blocklen; + } rw; + struct { + const char *old_name; + const char *new_name; + } rename; + struct { + struct cache_buffer *cache_buffer; + uint64_t length; + } flush; + struct { + struct cache_buffer *cache_buffer; + uint64_t length; + uint64_t offset; + } readahead; + struct { + /* offset of the file when the sync request was made */ + uint64_t offset; + TAILQ_ENTRY(spdk_fs_request) tailq; + bool xattr_in_progress; + /* length written to the xattr for this file - this should + * always be the same as the offset if only one thread is + * writing to the file, but could differ if multiple threads + * are appending + */ + uint64_t length; + } sync; + struct { + uint32_t num_clusters; + } resize; + struct { + const char *name; + uint32_t flags; + TAILQ_ENTRY(spdk_fs_request) tailq; + } open; + struct { + const char *name; + struct spdk_blob *blob; + } create; + struct { + const char *name; + } delete; + struct { + const char *name; + } stat; + } op; +}; + +static void file_free(struct spdk_file *file); +static void fs_io_device_unregister(struct spdk_filesystem *fs); +static void fs_free_io_channels(struct spdk_filesystem *fs); + +void +spdk_fs_opts_init(struct spdk_blobfs_opts *opts) +{ + opts->cluster_sz = SPDK_BLOBFS_DEFAULT_OPTS_CLUSTER_SZ; +} + +static int _blobfs_cache_pool_reclaim(void *arg); + +static bool +blobfs_cache_pool_need_reclaim(void) +{ + size_t count; + + count = spdk_mempool_count(g_cache_pool); + /* We define a aggressive policy here as the requirements from db_bench are batched, so start the poller + * when the number of available cache buffer is less than 1/5 of total buffers. + */ + if (count > (size_t)g_fs_cache_size / CACHE_BUFFER_SIZE / 5) { + return false; + } + + return true; +} + +static void +__start_cache_pool_mgmt(void *ctx) +{ + assert(g_cache_pool == NULL); + + g_cache_pool = spdk_mempool_create("spdk_fs_cache", + g_fs_cache_size / CACHE_BUFFER_SIZE, + CACHE_BUFFER_SIZE, + SPDK_MEMPOOL_DEFAULT_CACHE_SIZE, + SPDK_ENV_SOCKET_ID_ANY); + if (!g_cache_pool) { + SPDK_ERRLOG("Create mempool failed, you may " + "increase the memory and try again\n"); + assert(false); + } + TAILQ_INIT(&g_caches); + + assert(g_cache_pool_mgmt_poller == NULL); + g_cache_pool_mgmt_poller = SPDK_POLLER_REGISTER(_blobfs_cache_pool_reclaim, NULL, + BLOBFS_CACHE_POOL_POLL_PERIOD_IN_US); +} + +static void +__stop_cache_pool_mgmt(void *ctx) +{ + spdk_poller_unregister(&g_cache_pool_mgmt_poller); + + assert(g_cache_pool != NULL); + assert(spdk_mempool_count(g_cache_pool) == g_fs_cache_size / CACHE_BUFFER_SIZE); + spdk_mempool_free(g_cache_pool); + g_cache_pool = NULL; + + spdk_thread_exit(g_cache_pool_thread); +} + +static void +initialize_global_cache(void) +{ + pthread_mutex_lock(&g_cache_init_lock); + if (g_fs_count == 0) { + g_cache_pool_thread = spdk_thread_create("cache_pool_mgmt", NULL); + assert(g_cache_pool_thread != NULL); + spdk_thread_send_msg(g_cache_pool_thread, __start_cache_pool_mgmt, NULL); + } + g_fs_count++; + pthread_mutex_unlock(&g_cache_init_lock); +} + +static void +free_global_cache(void) +{ + pthread_mutex_lock(&g_cache_init_lock); + g_fs_count--; + if (g_fs_count == 0) { + spdk_thread_send_msg(g_cache_pool_thread, __stop_cache_pool_mgmt, NULL); + } + pthread_mutex_unlock(&g_cache_init_lock); +} + +static uint64_t +__file_get_blob_size(struct spdk_file *file) +{ + uint64_t cluster_sz; + + cluster_sz = file->fs->bs_opts.cluster_sz; + return cluster_sz * spdk_blob_get_num_clusters(file->blob); +} + +struct spdk_fs_request { + struct spdk_fs_cb_args args; + TAILQ_ENTRY(spdk_fs_request) link; + struct spdk_fs_channel *channel; +}; + +struct spdk_fs_channel { + struct spdk_fs_request *req_mem; + TAILQ_HEAD(, spdk_fs_request) reqs; + sem_t sem; + struct spdk_filesystem *fs; + struct spdk_io_channel *bs_channel; + fs_send_request_fn send_request; + bool sync; + uint32_t outstanding_reqs; + pthread_spinlock_t lock; +}; + +/* For now, this is effectively an alias. But eventually we'll shift + * some data members over. */ +struct spdk_fs_thread_ctx { + struct spdk_fs_channel ch; +}; + +static struct spdk_fs_request * +alloc_fs_request_with_iov(struct spdk_fs_channel *channel, uint32_t iovcnt) +{ + struct spdk_fs_request *req; + struct iovec *iovs = NULL; + + if (iovcnt > 1) { + iovs = calloc(iovcnt, sizeof(struct iovec)); + if (!iovs) { + return NULL; + } + } + + if (channel->sync) { + pthread_spin_lock(&channel->lock); + } + + req = TAILQ_FIRST(&channel->reqs); + if (req) { + channel->outstanding_reqs++; + TAILQ_REMOVE(&channel->reqs, req, link); + } + + if (channel->sync) { + pthread_spin_unlock(&channel->lock); + } + + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate req on spdk_fs_channel =%p\n", channel); + free(iovs); + return NULL; + } + memset(req, 0, sizeof(*req)); + req->channel = channel; + if (iovcnt > 1) { + req->args.iovs = iovs; + } else { + req->args.iovs = &req->args.iov; + } + req->args.iovcnt = iovcnt; + + return req; +} + +static struct spdk_fs_request * +alloc_fs_request(struct spdk_fs_channel *channel) +{ + return alloc_fs_request_with_iov(channel, 0); +} + +static void +free_fs_request(struct spdk_fs_request *req) +{ + struct spdk_fs_channel *channel = req->channel; + + if (req->args.iovcnt > 1) { + free(req->args.iovs); + } + + if (channel->sync) { + pthread_spin_lock(&channel->lock); + } + + TAILQ_INSERT_HEAD(&req->channel->reqs, req, link); + channel->outstanding_reqs--; + + if (channel->sync) { + pthread_spin_unlock(&channel->lock); + } +} + +static int +fs_channel_create(struct spdk_filesystem *fs, struct spdk_fs_channel *channel, + uint32_t max_ops) +{ + uint32_t i; + + channel->req_mem = calloc(max_ops, sizeof(struct spdk_fs_request)); + if (!channel->req_mem) { + return -1; + } + + channel->outstanding_reqs = 0; + TAILQ_INIT(&channel->reqs); + sem_init(&channel->sem, 0, 0); + + for (i = 0; i < max_ops; i++) { + TAILQ_INSERT_TAIL(&channel->reqs, &channel->req_mem[i], link); + } + + channel->fs = fs; + + return 0; +} + +static int +fs_md_channel_create(void *io_device, void *ctx_buf) +{ + struct spdk_filesystem *fs; + struct spdk_fs_channel *channel = ctx_buf; + + fs = SPDK_CONTAINEROF(io_device, struct spdk_filesystem, md_target); + + return fs_channel_create(fs, channel, fs->md_target.max_ops); +} + +static int +fs_sync_channel_create(void *io_device, void *ctx_buf) +{ + struct spdk_filesystem *fs; + struct spdk_fs_channel *channel = ctx_buf; + + fs = SPDK_CONTAINEROF(io_device, struct spdk_filesystem, sync_target); + + return fs_channel_create(fs, channel, fs->sync_target.max_ops); +} + +static int +fs_io_channel_create(void *io_device, void *ctx_buf) +{ + struct spdk_filesystem *fs; + struct spdk_fs_channel *channel = ctx_buf; + + fs = SPDK_CONTAINEROF(io_device, struct spdk_filesystem, io_target); + + return fs_channel_create(fs, channel, fs->io_target.max_ops); +} + +static void +fs_channel_destroy(void *io_device, void *ctx_buf) +{ + struct spdk_fs_channel *channel = ctx_buf; + + if (channel->outstanding_reqs > 0) { + SPDK_ERRLOG("channel freed with %" PRIu32 " outstanding requests!\n", + channel->outstanding_reqs); + } + + free(channel->req_mem); + if (channel->bs_channel != NULL) { + spdk_bs_free_io_channel(channel->bs_channel); + } +} + +static void +__send_request_direct(fs_request_fn fn, void *arg) +{ + fn(arg); +} + +static void +common_fs_bs_init(struct spdk_filesystem *fs, struct spdk_blob_store *bs) +{ + fs->bs = bs; + fs->bs_opts.cluster_sz = spdk_bs_get_cluster_size(bs); + fs->md_target.md_fs_channel->bs_channel = spdk_bs_alloc_io_channel(fs->bs); + fs->md_target.md_fs_channel->send_request = __send_request_direct; + fs->sync_target.sync_fs_channel->bs_channel = spdk_bs_alloc_io_channel(fs->bs); + fs->sync_target.sync_fs_channel->send_request = __send_request_direct; + + initialize_global_cache(); +} + +static void +init_cb(void *ctx, struct spdk_blob_store *bs, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + + if (bserrno == 0) { + common_fs_bs_init(fs, bs); + } else { + free(fs); + fs = NULL; + } + + args->fn.fs_op_with_handle(args->arg, fs, bserrno); + free_fs_request(req); +} + +static void +fs_conf_parse(void) +{ + struct spdk_conf_section *sp; + int cache_buffer_shift; + + sp = spdk_conf_find_section(NULL, "Blobfs"); + if (sp == NULL) { + g_fs_cache_buffer_shift = CACHE_BUFFER_SHIFT_DEFAULT; + return; + } + + cache_buffer_shift = spdk_conf_section_get_intval(sp, "CacheBufferShift"); + if (cache_buffer_shift <= 0) { + g_fs_cache_buffer_shift = CACHE_BUFFER_SHIFT_DEFAULT; + } else { + g_fs_cache_buffer_shift = cache_buffer_shift; + } +} + +static struct spdk_filesystem * +fs_alloc(struct spdk_bs_dev *dev, fs_send_request_fn send_request_fn) +{ + struct spdk_filesystem *fs; + + fs = calloc(1, sizeof(*fs)); + if (fs == NULL) { + return NULL; + } + + fs->bdev = dev; + fs->send_request = send_request_fn; + TAILQ_INIT(&fs->files); + + fs->md_target.max_ops = 512; + spdk_io_device_register(&fs->md_target, fs_md_channel_create, fs_channel_destroy, + sizeof(struct spdk_fs_channel), "blobfs_md"); + fs->md_target.md_io_channel = spdk_get_io_channel(&fs->md_target); + fs->md_target.md_fs_channel = spdk_io_channel_get_ctx(fs->md_target.md_io_channel); + + fs->sync_target.max_ops = 512; + spdk_io_device_register(&fs->sync_target, fs_sync_channel_create, fs_channel_destroy, + sizeof(struct spdk_fs_channel), "blobfs_sync"); + fs->sync_target.sync_io_channel = spdk_get_io_channel(&fs->sync_target); + fs->sync_target.sync_fs_channel = spdk_io_channel_get_ctx(fs->sync_target.sync_io_channel); + + fs->io_target.max_ops = 512; + spdk_io_device_register(&fs->io_target, fs_io_channel_create, fs_channel_destroy, + sizeof(struct spdk_fs_channel), "blobfs_io"); + + return fs; +} + +static void +__wake_caller(void *arg, int fserrno) +{ + struct spdk_fs_cb_args *args = arg; + + args->rc = fserrno; + sem_post(args->sem); +} + +void +spdk_fs_init(struct spdk_bs_dev *dev, struct spdk_blobfs_opts *opt, + fs_send_request_fn send_request_fn, + spdk_fs_op_with_handle_complete cb_fn, void *cb_arg) +{ + struct spdk_filesystem *fs; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + struct spdk_bs_opts opts = {}; + + fs = fs_alloc(dev, send_request_fn); + if (fs == NULL) { + cb_fn(cb_arg, NULL, -ENOMEM); + return; + } + + fs_conf_parse(); + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + fs_free_io_channels(fs); + fs_io_device_unregister(fs); + cb_fn(cb_arg, NULL, -ENOMEM); + return; + } + + args = &req->args; + args->fn.fs_op_with_handle = cb_fn; + args->arg = cb_arg; + args->fs = fs; + + spdk_bs_opts_init(&opts); + snprintf(opts.bstype.bstype, sizeof(opts.bstype.bstype), SPDK_BLOBFS_SIGNATURE); + if (opt) { + opts.cluster_sz = opt->cluster_sz; + } + spdk_bs_init(dev, &opts, init_cb, req); +} + +static struct spdk_file * +file_alloc(struct spdk_filesystem *fs) +{ + struct spdk_file *file; + + file = calloc(1, sizeof(*file)); + if (file == NULL) { + return NULL; + } + + file->tree = calloc(1, sizeof(*file->tree)); + if (file->tree == NULL) { + free(file); + return NULL; + } + + if (pthread_spin_init(&file->lock, 0)) { + free(file->tree); + free(file); + return NULL; + } + + file->fs = fs; + TAILQ_INIT(&file->open_requests); + TAILQ_INIT(&file->sync_requests); + TAILQ_INSERT_TAIL(&fs->files, file, tailq); + file->priority = SPDK_FILE_PRIORITY_LOW; + return file; +} + +static void fs_load_done(void *ctx, int bserrno); + +static int +_handle_deleted_files(struct spdk_fs_request *req) +{ + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + + if (!TAILQ_EMPTY(&args->op.fs_load.deleted_files)) { + struct spdk_deleted_file *deleted_file; + + deleted_file = TAILQ_FIRST(&args->op.fs_load.deleted_files); + TAILQ_REMOVE(&args->op.fs_load.deleted_files, deleted_file, tailq); + spdk_bs_delete_blob(fs->bs, deleted_file->id, fs_load_done, req); + free(deleted_file); + return 0; + } + + return 1; +} + +static void +fs_load_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + + /* The filesystem has been loaded. Now check if there are any files that + * were marked for deletion before last unload. Do not complete the + * fs_load callback until all of them have been deleted on disk. + */ + if (_handle_deleted_files(req) == 0) { + /* We found a file that's been marked for deleting but not actually + * deleted yet. This function will get called again once the delete + * operation is completed. + */ + return; + } + + args->fn.fs_op_with_handle(args->arg, fs, 0); + free_fs_request(req); + +} + +static void +_file_build_trace_arg_name(struct spdk_file *f) +{ + f->trace_arg_name = 0; + memcpy(&f->trace_arg_name, f->name, + spdk_min(sizeof(f->trace_arg_name), strlen(f->name))); +} + +static void +iter_cb(void *ctx, struct spdk_blob *blob, int rc) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + uint64_t *length; + const char *name; + uint32_t *is_deleted; + size_t value_len; + + if (rc < 0) { + args->fn.fs_op_with_handle(args->arg, fs, rc); + free_fs_request(req); + return; + } + + rc = spdk_blob_get_xattr_value(blob, "name", (const void **)&name, &value_len); + if (rc < 0) { + args->fn.fs_op_with_handle(args->arg, fs, rc); + free_fs_request(req); + return; + } + + rc = spdk_blob_get_xattr_value(blob, "length", (const void **)&length, &value_len); + if (rc < 0) { + args->fn.fs_op_with_handle(args->arg, fs, rc); + free_fs_request(req); + return; + } + + assert(value_len == 8); + + /* This file could be deleted last time without close it, then app crashed, so we delete it now */ + rc = spdk_blob_get_xattr_value(blob, "is_deleted", (const void **)&is_deleted, &value_len); + if (rc < 0) { + struct spdk_file *f; + + f = file_alloc(fs); + if (f == NULL) { + SPDK_ERRLOG("Cannot allocate file to handle deleted file on disk\n"); + args->fn.fs_op_with_handle(args->arg, fs, -ENOMEM); + free_fs_request(req); + return; + } + + f->name = strdup(name); + _file_build_trace_arg_name(f); + f->blobid = spdk_blob_get_id(blob); + f->length = *length; + f->length_flushed = *length; + f->length_xattr = *length; + f->append_pos = *length; + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "added file %s length=%ju\n", f->name, f->length); + } else { + struct spdk_deleted_file *deleted_file; + + deleted_file = calloc(1, sizeof(*deleted_file)); + if (deleted_file == NULL) { + args->fn.fs_op_with_handle(args->arg, fs, -ENOMEM); + free_fs_request(req); + return; + } + deleted_file->id = spdk_blob_get_id(blob); + TAILQ_INSERT_TAIL(&args->op.fs_load.deleted_files, deleted_file, tailq); + } +} + +static void +load_cb(void *ctx, struct spdk_blob_store *bs, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + struct spdk_bs_type bstype; + static const struct spdk_bs_type blobfs_type = {SPDK_BLOBFS_SIGNATURE}; + static const struct spdk_bs_type zeros; + + if (bserrno != 0) { + args->fn.fs_op_with_handle(args->arg, NULL, bserrno); + free_fs_request(req); + fs_free_io_channels(fs); + fs_io_device_unregister(fs); + return; + } + + bstype = spdk_bs_get_bstype(bs); + + if (!memcmp(&bstype, &zeros, sizeof(bstype))) { + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "assigning bstype\n"); + spdk_bs_set_bstype(bs, blobfs_type); + } else if (memcmp(&bstype, &blobfs_type, sizeof(bstype))) { + SPDK_ERRLOG("not blobfs\n"); + SPDK_LOGDUMP(SPDK_LOG_BLOBFS, "bstype", &bstype, sizeof(bstype)); + args->fn.fs_op_with_handle(args->arg, NULL, -EINVAL); + free_fs_request(req); + fs_free_io_channels(fs); + fs_io_device_unregister(fs); + return; + } + + common_fs_bs_init(fs, bs); + fs_load_done(req, 0); +} + +static void +fs_io_device_unregister(struct spdk_filesystem *fs) +{ + assert(fs != NULL); + spdk_io_device_unregister(&fs->md_target, NULL); + spdk_io_device_unregister(&fs->sync_target, NULL); + spdk_io_device_unregister(&fs->io_target, NULL); + free(fs); +} + +static void +fs_free_io_channels(struct spdk_filesystem *fs) +{ + assert(fs != NULL); + spdk_fs_free_io_channel(fs->md_target.md_io_channel); + spdk_fs_free_io_channel(fs->sync_target.sync_io_channel); +} + +void +spdk_fs_load(struct spdk_bs_dev *dev, fs_send_request_fn send_request_fn, + spdk_fs_op_with_handle_complete cb_fn, void *cb_arg) +{ + struct spdk_filesystem *fs; + struct spdk_fs_cb_args *args; + struct spdk_fs_request *req; + struct spdk_bs_opts bs_opts; + + fs = fs_alloc(dev, send_request_fn); + if (fs == NULL) { + cb_fn(cb_arg, NULL, -ENOMEM); + return; + } + + fs_conf_parse(); + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + fs_free_io_channels(fs); + fs_io_device_unregister(fs); + cb_fn(cb_arg, NULL, -ENOMEM); + return; + } + + args = &req->args; + args->fn.fs_op_with_handle = cb_fn; + args->arg = cb_arg; + args->fs = fs; + TAILQ_INIT(&args->op.fs_load.deleted_files); + spdk_bs_opts_init(&bs_opts); + bs_opts.iter_cb_fn = iter_cb; + bs_opts.iter_cb_arg = req; + spdk_bs_load(dev, &bs_opts, load_cb, req); +} + +static void +unload_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_filesystem *fs = args->fs; + struct spdk_file *file, *tmp; + + TAILQ_FOREACH_SAFE(file, &fs->files, tailq, tmp) { + TAILQ_REMOVE(&fs->files, file, tailq); + file_free(file); + } + + free_global_cache(); + + args->fn.fs_op(args->arg, bserrno); + free(req); + + fs_io_device_unregister(fs); +} + +void +spdk_fs_unload(struct spdk_filesystem *fs, spdk_fs_op_complete cb_fn, void *cb_arg) +{ + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + /* + * We must free the md_channel before unloading the blobstore, so just + * allocate this request from the general heap. + */ + req = calloc(1, sizeof(*req)); + if (req == NULL) { + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->fn.fs_op = cb_fn; + args->arg = cb_arg; + args->fs = fs; + + fs_free_io_channels(fs); + spdk_bs_unload(fs->bs, unload_cb, req); +} + +static struct spdk_file * +fs_find_file(struct spdk_filesystem *fs, const char *name) +{ + struct spdk_file *file; + + TAILQ_FOREACH(file, &fs->files, tailq) { + if (!strncmp(name, file->name, SPDK_FILE_NAME_MAX)) { + return file; + } + } + + return NULL; +} + +void +spdk_fs_file_stat_async(struct spdk_filesystem *fs, const char *name, + spdk_file_stat_op_complete cb_fn, void *cb_arg) +{ + struct spdk_file_stat stat; + struct spdk_file *f = NULL; + + if (strnlen(name, SPDK_FILE_NAME_MAX + 1) == SPDK_FILE_NAME_MAX + 1) { + cb_fn(cb_arg, NULL, -ENAMETOOLONG); + return; + } + + f = fs_find_file(fs, name); + if (f != NULL) { + stat.blobid = f->blobid; + stat.size = f->append_pos >= f->length ? f->append_pos : f->length; + cb_fn(cb_arg, &stat, 0); + return; + } + + cb_fn(cb_arg, NULL, -ENOENT); +} + +static void +__copy_stat(void *arg, struct spdk_file_stat *stat, int fserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + args->rc = fserrno; + if (fserrno == 0) { + memcpy(args->arg, stat, sizeof(*stat)); + } + sem_post(args->sem); +} + +static void +__file_stat(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + spdk_fs_file_stat_async(args->fs, args->op.stat.name, + args->fn.stat_op, req); +} + +int +spdk_fs_file_stat(struct spdk_filesystem *fs, struct spdk_fs_thread_ctx *ctx, + const char *name, struct spdk_file_stat *stat) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + int rc; + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate stat req on file=%s\n", name); + return -ENOMEM; + } + + req->args.fs = fs; + req->args.op.stat.name = name; + req->args.fn.stat_op = __copy_stat; + req->args.arg = stat; + req->args.sem = &channel->sem; + channel->send_request(__file_stat, req); + sem_wait(&channel->sem); + + rc = req->args.rc; + free_fs_request(req); + + return rc; +} + +static void +fs_create_blob_close_cb(void *ctx, int bserrno) +{ + int rc; + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + rc = args->rc ? args->rc : bserrno; + args->fn.file_op(args->arg, rc); + free_fs_request(req); +} + +static void +fs_create_blob_resize_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *f = args->file; + struct spdk_blob *blob = args->op.create.blob; + uint64_t length = 0; + + args->rc = bserrno; + if (bserrno) { + spdk_blob_close(blob, fs_create_blob_close_cb, args); + return; + } + + spdk_blob_set_xattr(blob, "name", f->name, strlen(f->name) + 1); + spdk_blob_set_xattr(blob, "length", &length, sizeof(length)); + + spdk_blob_close(blob, fs_create_blob_close_cb, args); +} + +static void +fs_create_blob_open_cb(void *ctx, struct spdk_blob *blob, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + if (bserrno) { + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); + return; + } + + args->op.create.blob = blob; + spdk_blob_resize(blob, 1, fs_create_blob_resize_cb, req); +} + +static void +fs_create_blob_create_cb(void *ctx, spdk_blob_id blobid, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *f = args->file; + + if (bserrno) { + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); + return; + } + + f->blobid = blobid; + spdk_bs_open_blob(f->fs->bs, blobid, fs_create_blob_open_cb, req); +} + +void +spdk_fs_create_file_async(struct spdk_filesystem *fs, const char *name, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_file *file; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + if (strnlen(name, SPDK_FILE_NAME_MAX + 1) == SPDK_FILE_NAME_MAX + 1) { + cb_fn(cb_arg, -ENAMETOOLONG); + return; + } + + file = fs_find_file(fs, name); + if (file != NULL) { + cb_fn(cb_arg, -EEXIST); + return; + } + + file = file_alloc(fs); + if (file == NULL) { + SPDK_ERRLOG("Cannot allocate new file for creation\n"); + cb_fn(cb_arg, -ENOMEM); + return; + } + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate create async req for file=%s\n", name); + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->file = file; + args->fn.file_op = cb_fn; + args->arg = cb_arg; + + file->name = strdup(name); + _file_build_trace_arg_name(file); + spdk_bs_create_blob(fs->bs, fs_create_blob_create_cb, args); +} + +static void +__fs_create_file_done(void *arg, int fserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + __wake_caller(args, fserrno); + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", args->op.create.name); +} + +static void +__fs_create_file(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", args->op.create.name); + spdk_fs_create_file_async(args->fs, args->op.create.name, __fs_create_file_done, req); +} + +int +spdk_fs_create_file(struct spdk_filesystem *fs, struct spdk_fs_thread_ctx *ctx, const char *name) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + int rc; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", name); + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate req to create file=%s\n", name); + return -ENOMEM; + } + + args = &req->args; + args->fs = fs; + args->op.create.name = name; + args->sem = &channel->sem; + fs->send_request(__fs_create_file, req); + sem_wait(&channel->sem); + rc = args->rc; + free_fs_request(req); + + return rc; +} + +static void +fs_open_blob_done(void *ctx, struct spdk_blob *blob, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *f = args->file; + + f->blob = blob; + while (!TAILQ_EMPTY(&f->open_requests)) { + req = TAILQ_FIRST(&f->open_requests); + args = &req->args; + TAILQ_REMOVE(&f->open_requests, req, args.op.open.tailq); + spdk_trace_record(TRACE_BLOBFS_OPEN, 0, 0, 0, f->trace_arg_name); + args->fn.file_op_with_handle(args->arg, f, bserrno); + free_fs_request(req); + } +} + +static void +fs_open_blob_create_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + struct spdk_filesystem *fs = args->fs; + + if (file == NULL) { + /* + * This is from an open with CREATE flag - the file + * is now created so look it up in the file list for this + * filesystem. + */ + file = fs_find_file(fs, args->op.open.name); + assert(file != NULL); + args->file = file; + } + + file->ref_count++; + TAILQ_INSERT_TAIL(&file->open_requests, req, args.op.open.tailq); + if (file->ref_count == 1) { + assert(file->blob == NULL); + spdk_bs_open_blob(fs->bs, file->blobid, fs_open_blob_done, req); + } else if (file->blob != NULL) { + fs_open_blob_done(req, file->blob, 0); + } else { + /* + * The blob open for this file is in progress due to a previous + * open request. When that open completes, it will invoke the + * open callback for this request. + */ + } +} + +void +spdk_fs_open_file_async(struct spdk_filesystem *fs, const char *name, uint32_t flags, + spdk_file_op_with_handle_complete cb_fn, void *cb_arg) +{ + struct spdk_file *f = NULL; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + if (strnlen(name, SPDK_FILE_NAME_MAX + 1) == SPDK_FILE_NAME_MAX + 1) { + cb_fn(cb_arg, NULL, -ENAMETOOLONG); + return; + } + + f = fs_find_file(fs, name); + if (f == NULL && !(flags & SPDK_BLOBFS_OPEN_CREATE)) { + cb_fn(cb_arg, NULL, -ENOENT); + return; + } + + if (f != NULL && f->is_deleted == true) { + cb_fn(cb_arg, NULL, -ENOENT); + return; + } + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate async open req for file=%s\n", name); + cb_fn(cb_arg, NULL, -ENOMEM); + return; + } + + args = &req->args; + args->fn.file_op_with_handle = cb_fn; + args->arg = cb_arg; + args->file = f; + args->fs = fs; + args->op.open.name = name; + + if (f == NULL) { + spdk_fs_create_file_async(fs, name, fs_open_blob_create_cb, req); + } else { + fs_open_blob_create_cb(req, 0); + } +} + +static void +__fs_open_file_done(void *arg, struct spdk_file *file, int bserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + args->file = file; + __wake_caller(args, bserrno); + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", args->op.open.name); +} + +static void +__fs_open_file(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", args->op.open.name); + spdk_fs_open_file_async(args->fs, args->op.open.name, args->op.open.flags, + __fs_open_file_done, req); +} + +int +spdk_fs_open_file(struct spdk_filesystem *fs, struct spdk_fs_thread_ctx *ctx, + const char *name, uint32_t flags, struct spdk_file **file) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + int rc; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", name); + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate req for opening file=%s\n", name); + return -ENOMEM; + } + + args = &req->args; + args->fs = fs; + args->op.open.name = name; + args->op.open.flags = flags; + args->sem = &channel->sem; + fs->send_request(__fs_open_file, req); + sem_wait(&channel->sem); + rc = args->rc; + if (rc == 0) { + *file = args->file; + } else { + *file = NULL; + } + free_fs_request(req); + + return rc; +} + +static void +fs_rename_blob_close_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + args->fn.fs_op(args->arg, bserrno); + free_fs_request(req); +} + +static void +fs_rename_blob_open_cb(void *ctx, struct spdk_blob *blob, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + const char *new_name = args->op.rename.new_name; + + spdk_blob_set_xattr(blob, "name", new_name, strlen(new_name) + 1); + spdk_blob_close(blob, fs_rename_blob_close_cb, req); +} + +static void +_fs_md_rename_file(struct spdk_fs_request *req) +{ + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *f; + + f = fs_find_file(args->fs, args->op.rename.old_name); + if (f == NULL) { + args->fn.fs_op(args->arg, -ENOENT); + free_fs_request(req); + return; + } + + free(f->name); + f->name = strdup(args->op.rename.new_name); + _file_build_trace_arg_name(f); + args->file = f; + spdk_bs_open_blob(args->fs->bs, f->blobid, fs_rename_blob_open_cb, req); +} + +static void +fs_rename_delete_done(void *arg, int fserrno) +{ + _fs_md_rename_file(arg); +} + +void +spdk_fs_rename_file_async(struct spdk_filesystem *fs, + const char *old_name, const char *new_name, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_file *f; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "old=%s new=%s\n", old_name, new_name); + if (strnlen(new_name, SPDK_FILE_NAME_MAX + 1) == SPDK_FILE_NAME_MAX + 1) { + cb_fn(cb_arg, -ENAMETOOLONG); + return; + } + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate rename async req for renaming file from %s to %s\n", old_name, + new_name); + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->fn.fs_op = cb_fn; + args->fs = fs; + args->arg = cb_arg; + args->op.rename.old_name = old_name; + args->op.rename.new_name = new_name; + + f = fs_find_file(fs, new_name); + if (f == NULL) { + _fs_md_rename_file(req); + return; + } + + /* + * The rename overwrites an existing file. So delete the existing file, then + * do the actual rename. + */ + spdk_fs_delete_file_async(fs, new_name, fs_rename_delete_done, req); +} + +static void +__fs_rename_file_done(void *arg, int fserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + __wake_caller(args, fserrno); +} + +static void +__fs_rename_file(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + spdk_fs_rename_file_async(args->fs, args->op.rename.old_name, args->op.rename.new_name, + __fs_rename_file_done, req); +} + +int +spdk_fs_rename_file(struct spdk_filesystem *fs, struct spdk_fs_thread_ctx *ctx, + const char *old_name, const char *new_name) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + int rc; + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate rename req for file=%s\n", old_name); + return -ENOMEM; + } + + args = &req->args; + + args->fs = fs; + args->op.rename.old_name = old_name; + args->op.rename.new_name = new_name; + args->sem = &channel->sem; + fs->send_request(__fs_rename_file, req); + sem_wait(&channel->sem); + rc = args->rc; + free_fs_request(req); + return rc; +} + +static void +blob_delete_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); +} + +void +spdk_fs_delete_file_async(struct spdk_filesystem *fs, const char *name, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_file *f; + spdk_blob_id blobid; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s\n", name); + + if (strnlen(name, SPDK_FILE_NAME_MAX + 1) == SPDK_FILE_NAME_MAX + 1) { + cb_fn(cb_arg, -ENAMETOOLONG); + return; + } + + f = fs_find_file(fs, name); + if (f == NULL) { + SPDK_ERRLOG("Cannot find the file=%s to deleted\n", name); + cb_fn(cb_arg, -ENOENT); + return; + } + + req = alloc_fs_request(fs->md_target.md_fs_channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate the req for the file=%s to deleted\n", name); + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->fn.file_op = cb_fn; + args->arg = cb_arg; + + if (f->ref_count > 0) { + /* If the ref > 0, we mark the file as deleted and delete it when we close it. */ + f->is_deleted = true; + spdk_blob_set_xattr(f->blob, "is_deleted", &f->is_deleted, sizeof(bool)); + spdk_blob_sync_md(f->blob, blob_delete_cb, req); + return; + } + + blobid = f->blobid; + TAILQ_REMOVE(&fs->files, f, tailq); + + file_free(f); + + spdk_bs_delete_blob(fs->bs, blobid, blob_delete_cb, req); +} + +static uint64_t +fs_name_to_uint64(const char *name) +{ + uint64_t result = 0; + memcpy(&result, name, spdk_min(sizeof(result), strlen(name))); + return result; +} + +static void +__fs_delete_file_done(void *arg, int fserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + spdk_trace_record(TRACE_BLOBFS_DELETE_DONE, 0, 0, 0, fs_name_to_uint64(args->op.delete.name)); + __wake_caller(args, fserrno); +} + +static void +__fs_delete_file(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + spdk_trace_record(TRACE_BLOBFS_DELETE_START, 0, 0, 0, fs_name_to_uint64(args->op.delete.name)); + spdk_fs_delete_file_async(args->fs, args->op.delete.name, __fs_delete_file_done, req); +} + +int +spdk_fs_delete_file(struct spdk_filesystem *fs, struct spdk_fs_thread_ctx *ctx, + const char *name) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + int rc; + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "Cannot allocate req to delete file=%s\n", name); + return -ENOMEM; + } + + args = &req->args; + args->fs = fs; + args->op.delete.name = name; + args->sem = &channel->sem; + fs->send_request(__fs_delete_file, req); + sem_wait(&channel->sem); + rc = args->rc; + free_fs_request(req); + + return rc; +} + +spdk_fs_iter +spdk_fs_iter_first(struct spdk_filesystem *fs) +{ + struct spdk_file *f; + + f = TAILQ_FIRST(&fs->files); + return f; +} + +spdk_fs_iter +spdk_fs_iter_next(spdk_fs_iter iter) +{ + struct spdk_file *f = iter; + + if (f == NULL) { + return NULL; + } + + f = TAILQ_NEXT(f, tailq); + return f; +} + +const char * +spdk_file_get_name(struct spdk_file *file) +{ + return file->name; +} + +uint64_t +spdk_file_get_length(struct spdk_file *file) +{ + uint64_t length; + + assert(file != NULL); + + length = file->append_pos >= file->length ? file->append_pos : file->length; + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s length=0x%jx\n", file->name, length); + return length; +} + +static void +fs_truncate_complete_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); +} + +static void +fs_truncate_resize_cb(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + uint64_t *length = &args->op.truncate.length; + + if (bserrno) { + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); + return; + } + + spdk_blob_set_xattr(file->blob, "length", length, sizeof(*length)); + + file->length = *length; + if (file->append_pos > file->length) { + file->append_pos = file->length; + } + + spdk_blob_sync_md(file->blob, fs_truncate_complete_cb, req); +} + +static uint64_t +__bytes_to_clusters(uint64_t length, uint64_t cluster_sz) +{ + return (length + cluster_sz - 1) / cluster_sz; +} + +void +spdk_file_truncate_async(struct spdk_file *file, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_filesystem *fs; + size_t num_clusters; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s old=0x%jx new=0x%jx\n", file->name, file->length, length); + if (length == file->length) { + cb_fn(cb_arg, 0); + return; + } + + req = alloc_fs_request(file->fs->md_target.md_fs_channel); + if (req == NULL) { + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->fn.file_op = cb_fn; + args->arg = cb_arg; + args->file = file; + args->op.truncate.length = length; + fs = file->fs; + + num_clusters = __bytes_to_clusters(length, fs->bs_opts.cluster_sz); + + spdk_blob_resize(file->blob, num_clusters, fs_truncate_resize_cb, req); +} + +static void +__truncate(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + spdk_file_truncate_async(args->file, args->op.truncate.length, + args->fn.file_op, args); +} + +int +spdk_file_truncate(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx, + uint64_t length) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + int rc; + + req = alloc_fs_request(channel); + if (req == NULL) { + return -ENOMEM; + } + + args = &req->args; + + args->file = file; + args->op.truncate.length = length; + args->fn.file_op = __wake_caller; + args->sem = &channel->sem; + + channel->send_request(__truncate, req); + sem_wait(&channel->sem); + rc = args->rc; + free_fs_request(req); + + return rc; +} + +static void +__rw_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + spdk_free(args->op.rw.pin_buf); + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); +} + +static void +_copy_iovs_to_buf(void *buf, size_t buf_len, struct iovec *iovs, int iovcnt) +{ + int i; + size_t len; + + for (i = 0; i < iovcnt; i++) { + len = spdk_min(iovs[i].iov_len, buf_len); + memcpy(buf, iovs[i].iov_base, len); + buf += len; + assert(buf_len >= len); + buf_len -= len; + } +} + +static void +_copy_buf_to_iovs(struct iovec *iovs, int iovcnt, void *buf, size_t buf_len) +{ + int i; + size_t len; + + for (i = 0; i < iovcnt; i++) { + len = spdk_min(iovs[i].iov_len, buf_len); + memcpy(iovs[i].iov_base, buf, len); + buf += len; + assert(buf_len >= len); + buf_len -= len; + } +} + +static void +__read_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + void *buf; + + assert(req != NULL); + buf = (void *)((uintptr_t)args->op.rw.pin_buf + (args->op.rw.offset & (args->op.rw.blocklen - 1))); + if (args->op.rw.is_read) { + _copy_buf_to_iovs(args->iovs, args->iovcnt, buf, args->op.rw.length); + __rw_done(req, 0); + } else { + _copy_iovs_to_buf(buf, args->op.rw.length, args->iovs, args->iovcnt); + spdk_blob_io_write(args->file->blob, args->op.rw.channel, + args->op.rw.pin_buf, + args->op.rw.start_lba, args->op.rw.num_lba, + __rw_done, req); + } +} + +static void +__do_blob_read(void *ctx, int fserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + + if (fserrno) { + __rw_done(req, fserrno); + return; + } + spdk_blob_io_read(args->file->blob, args->op.rw.channel, + args->op.rw.pin_buf, + args->op.rw.start_lba, args->op.rw.num_lba, + __read_done, req); +} + +static void +__get_page_parameters(struct spdk_file *file, uint64_t offset, uint64_t length, + uint64_t *start_lba, uint32_t *lba_size, uint64_t *num_lba) +{ + uint64_t end_lba; + + *lba_size = spdk_bs_get_io_unit_size(file->fs->bs); + *start_lba = offset / *lba_size; + end_lba = (offset + length - 1) / *lba_size; + *num_lba = (end_lba - *start_lba + 1); +} + +static bool +__is_lba_aligned(struct spdk_file *file, uint64_t offset, uint64_t length) +{ + uint32_t lba_size = spdk_bs_get_io_unit_size(file->fs->bs); + + if ((offset % lba_size == 0) && (length % lba_size == 0)) { + return true; + } + + return false; +} + +static void +_fs_request_setup_iovs(struct spdk_fs_request *req, struct iovec *iovs, uint32_t iovcnt) +{ + uint32_t i; + + for (i = 0; i < iovcnt; i++) { + req->args.iovs[i].iov_base = iovs[i].iov_base; + req->args.iovs[i].iov_len = iovs[i].iov_len; + } +} + +static void +__readvwritev(struct spdk_file *file, struct spdk_io_channel *_channel, + struct iovec *iovs, uint32_t iovcnt, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg, int is_read) +{ + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + struct spdk_fs_channel *channel = spdk_io_channel_get_ctx(_channel); + uint64_t start_lba, num_lba, pin_buf_length; + uint32_t lba_size; + + if (is_read && offset + length > file->length) { + cb_fn(cb_arg, -EINVAL); + return; + } + + req = alloc_fs_request_with_iov(channel, iovcnt); + if (req == NULL) { + cb_fn(cb_arg, -ENOMEM); + return; + } + + __get_page_parameters(file, offset, length, &start_lba, &lba_size, &num_lba); + + args = &req->args; + args->fn.file_op = cb_fn; + args->arg = cb_arg; + args->file = file; + args->op.rw.channel = channel->bs_channel; + _fs_request_setup_iovs(req, iovs, iovcnt); + args->op.rw.is_read = is_read; + args->op.rw.offset = offset; + args->op.rw.blocklen = lba_size; + + pin_buf_length = num_lba * lba_size; + args->op.rw.length = pin_buf_length; + args->op.rw.pin_buf = spdk_malloc(pin_buf_length, lba_size, NULL, + SPDK_ENV_SOCKET_ID_ANY, SPDK_MALLOC_DMA); + if (args->op.rw.pin_buf == NULL) { + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "Failed to allocate buf for: file=%s offset=%jx length=%jx\n", + file->name, offset, length); + free_fs_request(req); + cb_fn(cb_arg, -ENOMEM); + return; + } + + args->op.rw.start_lba = start_lba; + args->op.rw.num_lba = num_lba; + + if (!is_read && file->length < offset + length) { + spdk_file_truncate_async(file, offset + length, __do_blob_read, req); + } else if (!is_read && __is_lba_aligned(file, offset, length)) { + _copy_iovs_to_buf(args->op.rw.pin_buf, args->op.rw.length, args->iovs, args->iovcnt); + spdk_blob_io_write(args->file->blob, args->op.rw.channel, + args->op.rw.pin_buf, + args->op.rw.start_lba, args->op.rw.num_lba, + __rw_done, req); + } else { + __do_blob_read(req, 0); + } +} + +static void +__readwrite(struct spdk_file *file, struct spdk_io_channel *channel, + void *payload, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg, int is_read) +{ + struct iovec iov; + + iov.iov_base = payload; + iov.iov_len = (size_t)length; + + __readvwritev(file, channel, &iov, 1, offset, length, cb_fn, cb_arg, is_read); +} + +void +spdk_file_write_async(struct spdk_file *file, struct spdk_io_channel *channel, + void *payload, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + __readwrite(file, channel, payload, offset, length, cb_fn, cb_arg, 0); +} + +void +spdk_file_writev_async(struct spdk_file *file, struct spdk_io_channel *channel, + struct iovec *iovs, uint32_t iovcnt, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s offset=%jx length=%jx\n", + file->name, offset, length); + + __readvwritev(file, channel, iovs, iovcnt, offset, length, cb_fn, cb_arg, 0); +} + +void +spdk_file_read_async(struct spdk_file *file, struct spdk_io_channel *channel, + void *payload, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s offset=%jx length=%jx\n", + file->name, offset, length); + __readwrite(file, channel, payload, offset, length, cb_fn, cb_arg, 1); +} + +void +spdk_file_readv_async(struct spdk_file *file, struct spdk_io_channel *channel, + struct iovec *iovs, uint32_t iovcnt, uint64_t offset, uint64_t length, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "file=%s offset=%jx length=%jx\n", + file->name, offset, length); + + __readvwritev(file, channel, iovs, iovcnt, offset, length, cb_fn, cb_arg, 1); +} + +struct spdk_io_channel * +spdk_fs_alloc_io_channel(struct spdk_filesystem *fs) +{ + struct spdk_io_channel *io_channel; + struct spdk_fs_channel *fs_channel; + + io_channel = spdk_get_io_channel(&fs->io_target); + fs_channel = spdk_io_channel_get_ctx(io_channel); + fs_channel->bs_channel = spdk_bs_alloc_io_channel(fs->bs); + fs_channel->send_request = __send_request_direct; + + return io_channel; +} + +void +spdk_fs_free_io_channel(struct spdk_io_channel *channel) +{ + spdk_put_io_channel(channel); +} + +struct spdk_fs_thread_ctx * +spdk_fs_alloc_thread_ctx(struct spdk_filesystem *fs) +{ + struct spdk_fs_thread_ctx *ctx; + + ctx = calloc(1, sizeof(*ctx)); + if (!ctx) { + return NULL; + } + + if (pthread_spin_init(&ctx->ch.lock, 0)) { + free(ctx); + return NULL; + } + + fs_channel_create(fs, &ctx->ch, 512); + + ctx->ch.send_request = fs->send_request; + ctx->ch.sync = 1; + + return ctx; +} + + +void +spdk_fs_free_thread_ctx(struct spdk_fs_thread_ctx *ctx) +{ + assert(ctx->ch.sync == 1); + + while (true) { + pthread_spin_lock(&ctx->ch.lock); + if (ctx->ch.outstanding_reqs == 0) { + pthread_spin_unlock(&ctx->ch.lock); + break; + } + pthread_spin_unlock(&ctx->ch.lock); + usleep(1000); + } + + fs_channel_destroy(NULL, &ctx->ch); + free(ctx); +} + +int +spdk_fs_set_cache_size(uint64_t size_in_mb) +{ + /* setting g_fs_cache_size is only permitted if cache pool + * is already freed or hasn't been initialized + */ + if (g_cache_pool != NULL) { + return -EPERM; + } + + g_fs_cache_size = size_in_mb * 1024 * 1024; + + return 0; +} + +uint64_t +spdk_fs_get_cache_size(void) +{ + return g_fs_cache_size / (1024 * 1024); +} + +static void __file_flush(void *ctx); + +/* Try to free some cache buffers from this file. + */ +static int +reclaim_cache_buffers(struct spdk_file *file) +{ + int rc; + + BLOBFS_TRACE(file, "free=%s\n", file->name); + + /* The function is safe to be called with any threads, while the file + * lock maybe locked by other thread for now, so try to get the file + * lock here. + */ + rc = pthread_spin_trylock(&file->lock); + if (rc != 0) { + return -1; + } + + if (file->tree->present_mask == 0) { + pthread_spin_unlock(&file->lock); + return -1; + } + tree_free_buffers(file->tree); + + TAILQ_REMOVE(&g_caches, file, cache_tailq); + /* If not freed, put it in the end of the queue */ + if (file->tree->present_mask != 0) { + TAILQ_INSERT_TAIL(&g_caches, file, cache_tailq); + } else { + file->last = NULL; + } + pthread_spin_unlock(&file->lock); + + return 0; +} + +static int +_blobfs_cache_pool_reclaim(void *arg) +{ + struct spdk_file *file, *tmp; + int rc; + + if (!blobfs_cache_pool_need_reclaim()) { + return SPDK_POLLER_IDLE; + } + + TAILQ_FOREACH_SAFE(file, &g_caches, cache_tailq, tmp) { + if (!file->open_for_writing && + file->priority == SPDK_FILE_PRIORITY_LOW) { + rc = reclaim_cache_buffers(file); + if (rc < 0) { + continue; + } + if (!blobfs_cache_pool_need_reclaim()) { + return SPDK_POLLER_BUSY; + } + break; + } + } + + TAILQ_FOREACH_SAFE(file, &g_caches, cache_tailq, tmp) { + if (!file->open_for_writing) { + rc = reclaim_cache_buffers(file); + if (rc < 0) { + continue; + } + if (!blobfs_cache_pool_need_reclaim()) { + return SPDK_POLLER_BUSY; + } + break; + } + } + + TAILQ_FOREACH_SAFE(file, &g_caches, cache_tailq, tmp) { + rc = reclaim_cache_buffers(file); + if (rc < 0) { + continue; + } + break; + } + + return SPDK_POLLER_BUSY; +} + +static void +_add_file_to_cache_pool(void *ctx) +{ + struct spdk_file *file = ctx; + + TAILQ_INSERT_TAIL(&g_caches, file, cache_tailq); +} + +static void +_remove_file_from_cache_pool(void *ctx) +{ + struct spdk_file *file = ctx; + + TAILQ_REMOVE(&g_caches, file, cache_tailq); +} + +static struct cache_buffer * +cache_insert_buffer(struct spdk_file *file, uint64_t offset) +{ + struct cache_buffer *buf; + int count = 0; + bool need_update = false; + + buf = calloc(1, sizeof(*buf)); + if (buf == NULL) { + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "calloc failed\n"); + return NULL; + } + + do { + buf->buf = spdk_mempool_get(g_cache_pool); + if (buf->buf) { + break; + } + if (count++ == 100) { + SPDK_ERRLOG("Could not allocate cache buffer for file=%p on offset=%jx\n", + file, offset); + free(buf); + return NULL; + } + usleep(BLOBFS_CACHE_POOL_POLL_PERIOD_IN_US); + } while (true); + + buf->buf_size = CACHE_BUFFER_SIZE; + buf->offset = offset; + + if (file->tree->present_mask == 0) { + need_update = true; + } + file->tree = tree_insert_buffer(file->tree, buf); + + if (need_update) { + spdk_thread_send_msg(g_cache_pool_thread, _add_file_to_cache_pool, file); + } + + return buf; +} + +static struct cache_buffer * +cache_append_buffer(struct spdk_file *file) +{ + struct cache_buffer *last; + + assert(file->last == NULL || file->last->bytes_filled == file->last->buf_size); + assert((file->append_pos % CACHE_BUFFER_SIZE) == 0); + + last = cache_insert_buffer(file, file->append_pos); + if (last == NULL) { + SPDK_DEBUGLOG(SPDK_LOG_BLOBFS, "cache_insert_buffer failed\n"); + return NULL; + } + + file->last = last; + + return last; +} + +static void __check_sync_reqs(struct spdk_file *file); + +static void +__file_cache_finish_sync(void *ctx, int bserrno) +{ + struct spdk_file *file; + struct spdk_fs_request *sync_req = ctx; + struct spdk_fs_cb_args *sync_args; + + sync_args = &sync_req->args; + file = sync_args->file; + pthread_spin_lock(&file->lock); + file->length_xattr = sync_args->op.sync.length; + assert(sync_args->op.sync.offset <= file->length_flushed); + spdk_trace_record(TRACE_BLOBFS_XATTR_END, 0, sync_args->op.sync.offset, + 0, file->trace_arg_name); + BLOBFS_TRACE(file, "sync done offset=%jx\n", sync_args->op.sync.offset); + TAILQ_REMOVE(&file->sync_requests, sync_req, args.op.sync.tailq); + pthread_spin_unlock(&file->lock); + + sync_args->fn.file_op(sync_args->arg, bserrno); + + free_fs_request(sync_req); + __check_sync_reqs(file); +} + +static void +__check_sync_reqs(struct spdk_file *file) +{ + struct spdk_fs_request *sync_req; + + pthread_spin_lock(&file->lock); + + TAILQ_FOREACH(sync_req, &file->sync_requests, args.op.sync.tailq) { + if (sync_req->args.op.sync.offset <= file->length_flushed) { + break; + } + } + + if (sync_req != NULL && !sync_req->args.op.sync.xattr_in_progress) { + BLOBFS_TRACE(file, "set xattr length 0x%jx\n", file->length_flushed); + sync_req->args.op.sync.xattr_in_progress = true; + sync_req->args.op.sync.length = file->length_flushed; + spdk_blob_set_xattr(file->blob, "length", &file->length_flushed, + sizeof(file->length_flushed)); + + pthread_spin_unlock(&file->lock); + spdk_trace_record(TRACE_BLOBFS_XATTR_START, 0, file->length_flushed, + 0, file->trace_arg_name); + spdk_blob_sync_md(file->blob, __file_cache_finish_sync, sync_req); + } else { + pthread_spin_unlock(&file->lock); + } +} + +static void +__file_flush_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + struct cache_buffer *next = args->op.flush.cache_buffer; + + BLOBFS_TRACE(file, "length=%jx\n", args->op.flush.length); + + pthread_spin_lock(&file->lock); + next->in_progress = false; + next->bytes_flushed += args->op.flush.length; + file->length_flushed += args->op.flush.length; + if (file->length_flushed > file->length) { + file->length = file->length_flushed; + } + if (next->bytes_flushed == next->buf_size) { + BLOBFS_TRACE(file, "write buffer fully flushed 0x%jx\n", file->length_flushed); + next = tree_find_buffer(file->tree, file->length_flushed); + } + + /* + * Assert that there is no cached data that extends past the end of the underlying + * blob. + */ + assert(next == NULL || next->offset < __file_get_blob_size(file) || + next->bytes_filled == 0); + + pthread_spin_unlock(&file->lock); + + __check_sync_reqs(file); + + __file_flush(req); +} + +static void +__file_flush(void *ctx) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + struct cache_buffer *next; + uint64_t offset, length, start_lba, num_lba; + uint32_t lba_size; + + pthread_spin_lock(&file->lock); + next = tree_find_buffer(file->tree, file->length_flushed); + if (next == NULL || next->in_progress || + ((next->bytes_filled < next->buf_size) && TAILQ_EMPTY(&file->sync_requests))) { + /* + * There is either no data to flush, a flush I/O is already in + * progress, or the next buffer is partially filled but there's no + * outstanding request to sync it. + * So return immediately - if a flush I/O is in progress we will flush + * more data after that is completed, or a partial buffer will get flushed + * when it is either filled or the file is synced. + */ + free_fs_request(req); + if (next == NULL) { + /* + * For cases where a file's cache was evicted, and then the + * file was later appended, we will write the data directly + * to disk and bypass cache. So just update length_flushed + * here to reflect that all data was already written to disk. + */ + file->length_flushed = file->append_pos; + } + pthread_spin_unlock(&file->lock); + if (next == NULL) { + /* + * There is no data to flush, but we still need to check for any + * outstanding sync requests to make sure metadata gets updated. + */ + __check_sync_reqs(file); + } + return; + } + + offset = next->offset + next->bytes_flushed; + length = next->bytes_filled - next->bytes_flushed; + if (length == 0) { + free_fs_request(req); + pthread_spin_unlock(&file->lock); + /* + * There is no data to flush, but we still need to check for any + * outstanding sync requests to make sure metadata gets updated. + */ + __check_sync_reqs(file); + return; + } + args->op.flush.length = length; + args->op.flush.cache_buffer = next; + + __get_page_parameters(file, offset, length, &start_lba, &lba_size, &num_lba); + + next->in_progress = true; + BLOBFS_TRACE(file, "offset=0x%jx length=0x%jx page start=0x%jx num=0x%jx\n", + offset, length, start_lba, num_lba); + pthread_spin_unlock(&file->lock); + spdk_blob_io_write(file->blob, file->fs->sync_target.sync_fs_channel->bs_channel, + next->buf + (start_lba * lba_size) - next->offset, + start_lba, num_lba, __file_flush_done, req); +} + +static void +__file_extend_done(void *arg, int bserrno) +{ + struct spdk_fs_cb_args *args = arg; + + __wake_caller(args, bserrno); +} + +static void +__file_extend_resize_cb(void *_args, int bserrno) +{ + struct spdk_fs_cb_args *args = _args; + struct spdk_file *file = args->file; + + if (bserrno) { + __wake_caller(args, bserrno); + return; + } + + spdk_blob_sync_md(file->blob, __file_extend_done, args); +} + +static void +__file_extend_blob(void *_args) +{ + struct spdk_fs_cb_args *args = _args; + struct spdk_file *file = args->file; + + spdk_blob_resize(file->blob, args->op.resize.num_clusters, __file_extend_resize_cb, args); +} + +static void +__rw_from_file_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + + __wake_caller(&req->args, bserrno); + free_fs_request(req); +} + +static void +__rw_from_file(void *ctx) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + + if (args->op.rw.is_read) { + spdk_file_read_async(file, file->fs->sync_target.sync_io_channel, args->iovs[0].iov_base, + args->op.rw.offset, (uint64_t)args->iovs[0].iov_len, + __rw_from_file_done, req); + } else { + spdk_file_write_async(file, file->fs->sync_target.sync_io_channel, args->iovs[0].iov_base, + args->op.rw.offset, (uint64_t)args->iovs[0].iov_len, + __rw_from_file_done, req); + } +} + +static int +__send_rw_from_file(struct spdk_file *file, void *payload, + uint64_t offset, uint64_t length, bool is_read, + struct spdk_fs_channel *channel) +{ + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + req = alloc_fs_request_with_iov(channel, 1); + if (req == NULL) { + sem_post(&channel->sem); + return -ENOMEM; + } + + args = &req->args; + args->file = file; + args->sem = &channel->sem; + args->iovs[0].iov_base = payload; + args->iovs[0].iov_len = (size_t)length; + args->op.rw.offset = offset; + args->op.rw.is_read = is_read; + file->fs->send_request(__rw_from_file, req); + return 0; +} + +int +spdk_file_write(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx, + void *payload, uint64_t offset, uint64_t length) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *flush_req; + uint64_t rem_length, copy, blob_size, cluster_sz; + uint32_t cache_buffers_filled = 0; + uint8_t *cur_payload; + struct cache_buffer *last; + + BLOBFS_TRACE_RW(file, "offset=%jx length=%jx\n", offset, length); + + if (length == 0) { + return 0; + } + + if (offset != file->append_pos) { + BLOBFS_TRACE(file, " error offset=%jx append_pos=%jx\n", offset, file->append_pos); + return -EINVAL; + } + + pthread_spin_lock(&file->lock); + file->open_for_writing = true; + + if ((file->last == NULL) && (file->append_pos % CACHE_BUFFER_SIZE == 0)) { + cache_append_buffer(file); + } + + if (file->last == NULL) { + int rc; + + file->append_pos += length; + pthread_spin_unlock(&file->lock); + rc = __send_rw_from_file(file, payload, offset, length, false, channel); + sem_wait(&channel->sem); + return rc; + } + + blob_size = __file_get_blob_size(file); + + if ((offset + length) > blob_size) { + struct spdk_fs_cb_args extend_args = {}; + + cluster_sz = file->fs->bs_opts.cluster_sz; + extend_args.sem = &channel->sem; + extend_args.op.resize.num_clusters = __bytes_to_clusters((offset + length), cluster_sz); + extend_args.file = file; + BLOBFS_TRACE(file, "start resize to %u clusters\n", extend_args.op.resize.num_clusters); + pthread_spin_unlock(&file->lock); + file->fs->send_request(__file_extend_blob, &extend_args); + sem_wait(&channel->sem); + if (extend_args.rc) { + return extend_args.rc; + } + } + + flush_req = alloc_fs_request(channel); + if (flush_req == NULL) { + pthread_spin_unlock(&file->lock); + return -ENOMEM; + } + + last = file->last; + rem_length = length; + cur_payload = payload; + while (rem_length > 0) { + copy = last->buf_size - last->bytes_filled; + if (copy > rem_length) { + copy = rem_length; + } + BLOBFS_TRACE_RW(file, " fill offset=%jx length=%jx\n", file->append_pos, copy); + memcpy(&last->buf[last->bytes_filled], cur_payload, copy); + file->append_pos += copy; + if (file->length < file->append_pos) { + file->length = file->append_pos; + } + cur_payload += copy; + last->bytes_filled += copy; + rem_length -= copy; + if (last->bytes_filled == last->buf_size) { + cache_buffers_filled++; + last = cache_append_buffer(file); + if (last == NULL) { + BLOBFS_TRACE(file, "nomem\n"); + free_fs_request(flush_req); + pthread_spin_unlock(&file->lock); + return -ENOMEM; + } + } + } + + pthread_spin_unlock(&file->lock); + + if (cache_buffers_filled == 0) { + free_fs_request(flush_req); + return 0; + } + + flush_req->args.file = file; + file->fs->send_request(__file_flush, flush_req); + return 0; +} + +static void +__readahead_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct cache_buffer *cache_buffer = args->op.readahead.cache_buffer; + struct spdk_file *file = args->file; + + BLOBFS_TRACE(file, "offset=%jx\n", cache_buffer->offset); + + pthread_spin_lock(&file->lock); + cache_buffer->bytes_filled = args->op.readahead.length; + cache_buffer->bytes_flushed = args->op.readahead.length; + cache_buffer->in_progress = false; + pthread_spin_unlock(&file->lock); + + free_fs_request(req); +} + +static void +__readahead(void *ctx) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + uint64_t offset, length, start_lba, num_lba; + uint32_t lba_size; + + offset = args->op.readahead.offset; + length = args->op.readahead.length; + assert(length > 0); + + __get_page_parameters(file, offset, length, &start_lba, &lba_size, &num_lba); + + BLOBFS_TRACE(file, "offset=%jx length=%jx page start=%jx num=%jx\n", + offset, length, start_lba, num_lba); + spdk_blob_io_read(file->blob, file->fs->sync_target.sync_fs_channel->bs_channel, + args->op.readahead.cache_buffer->buf, + start_lba, num_lba, __readahead_done, req); +} + +static uint64_t +__next_cache_buffer_offset(uint64_t offset) +{ + return (offset + CACHE_BUFFER_SIZE) & ~(CACHE_TREE_LEVEL_MASK(0)); +} + +static void +check_readahead(struct spdk_file *file, uint64_t offset, + struct spdk_fs_channel *channel) +{ + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + offset = __next_cache_buffer_offset(offset); + if (tree_find_buffer(file->tree, offset) != NULL || file->length <= offset) { + return; + } + + req = alloc_fs_request(channel); + if (req == NULL) { + return; + } + args = &req->args; + + BLOBFS_TRACE(file, "offset=%jx\n", offset); + + args->file = file; + args->op.readahead.offset = offset; + args->op.readahead.cache_buffer = cache_insert_buffer(file, offset); + if (!args->op.readahead.cache_buffer) { + BLOBFS_TRACE(file, "Cannot allocate buf for offset=%jx\n", offset); + free_fs_request(req); + return; + } + + args->op.readahead.cache_buffer->in_progress = true; + if (file->length < (offset + CACHE_BUFFER_SIZE)) { + args->op.readahead.length = file->length & (CACHE_BUFFER_SIZE - 1); + } else { + args->op.readahead.length = CACHE_BUFFER_SIZE; + } + file->fs->send_request(__readahead, req); +} + +int64_t +spdk_file_read(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx, + void *payload, uint64_t offset, uint64_t length) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + uint64_t final_offset, final_length; + uint32_t sub_reads = 0; + struct cache_buffer *buf; + uint64_t read_len; + int rc = 0; + + pthread_spin_lock(&file->lock); + + BLOBFS_TRACE_RW(file, "offset=%ju length=%ju\n", offset, length); + + file->open_for_writing = false; + + if (length == 0 || offset >= file->append_pos) { + pthread_spin_unlock(&file->lock); + return 0; + } + + if (offset + length > file->append_pos) { + length = file->append_pos - offset; + } + + if (offset != file->next_seq_offset) { + file->seq_byte_count = 0; + } + file->seq_byte_count += length; + file->next_seq_offset = offset + length; + if (file->seq_byte_count >= CACHE_READAHEAD_THRESHOLD) { + check_readahead(file, offset, channel); + check_readahead(file, offset + CACHE_BUFFER_SIZE, channel); + } + + final_length = 0; + final_offset = offset + length; + while (offset < final_offset) { + length = NEXT_CACHE_BUFFER_OFFSET(offset) - offset; + if (length > (final_offset - offset)) { + length = final_offset - offset; + } + + buf = tree_find_filled_buffer(file->tree, offset); + if (buf == NULL) { + pthread_spin_unlock(&file->lock); + rc = __send_rw_from_file(file, payload, offset, length, true, channel); + pthread_spin_lock(&file->lock); + if (rc == 0) { + sub_reads++; + } + } else { + read_len = length; + if ((offset + length) > (buf->offset + buf->bytes_filled)) { + read_len = buf->offset + buf->bytes_filled - offset; + } + BLOBFS_TRACE(file, "read %p offset=%ju length=%ju\n", payload, offset, read_len); + memcpy(payload, &buf->buf[offset - buf->offset], read_len); + if ((offset + read_len) % CACHE_BUFFER_SIZE == 0) { + tree_remove_buffer(file->tree, buf); + if (file->tree->present_mask == 0) { + spdk_thread_send_msg(g_cache_pool_thread, _remove_file_from_cache_pool, file); + } + } + } + + if (rc == 0) { + final_length += length; + } else { + break; + } + payload += length; + offset += length; + } + pthread_spin_unlock(&file->lock); + while (sub_reads > 0) { + sem_wait(&channel->sem); + sub_reads--; + } + if (rc == 0) { + return final_length; + } else { + return rc; + } +} + +static void +_file_sync(struct spdk_file *file, struct spdk_fs_channel *channel, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_fs_request *sync_req; + struct spdk_fs_request *flush_req; + struct spdk_fs_cb_args *sync_args; + struct spdk_fs_cb_args *flush_args; + + BLOBFS_TRACE(file, "offset=%jx\n", file->append_pos); + + pthread_spin_lock(&file->lock); + if (file->append_pos <= file->length_xattr) { + BLOBFS_TRACE(file, "done - file already synced\n"); + pthread_spin_unlock(&file->lock); + cb_fn(cb_arg, 0); + return; + } + + sync_req = alloc_fs_request(channel); + if (!sync_req) { + SPDK_ERRLOG("Cannot allocate sync req for file=%s\n", file->name); + pthread_spin_unlock(&file->lock); + cb_fn(cb_arg, -ENOMEM); + return; + } + sync_args = &sync_req->args; + + flush_req = alloc_fs_request(channel); + if (!flush_req) { + SPDK_ERRLOG("Cannot allocate flush req for file=%s\n", file->name); + free_fs_request(sync_req); + pthread_spin_unlock(&file->lock); + cb_fn(cb_arg, -ENOMEM); + return; + } + flush_args = &flush_req->args; + + sync_args->file = file; + sync_args->fn.file_op = cb_fn; + sync_args->arg = cb_arg; + sync_args->op.sync.offset = file->append_pos; + sync_args->op.sync.xattr_in_progress = false; + TAILQ_INSERT_TAIL(&file->sync_requests, sync_req, args.op.sync.tailq); + pthread_spin_unlock(&file->lock); + + flush_args->file = file; + channel->send_request(__file_flush, flush_req); +} + +int +spdk_file_sync(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_cb_args args = {}; + + args.sem = &channel->sem; + _file_sync(file, channel, __wake_caller, &args); + sem_wait(&channel->sem); + + return args.rc; +} + +void +spdk_file_sync_async(struct spdk_file *file, struct spdk_io_channel *_channel, + spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_fs_channel *channel = spdk_io_channel_get_ctx(_channel); + + _file_sync(file, channel, cb_fn, cb_arg); +} + +void +spdk_file_set_priority(struct spdk_file *file, uint32_t priority) +{ + BLOBFS_TRACE(file, "priority=%u\n", priority); + file->priority = priority; + +} + +/* + * Close routines + */ + +static void +__file_close_async_done(void *ctx, int bserrno) +{ + struct spdk_fs_request *req = ctx; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + + spdk_trace_record(TRACE_BLOBFS_CLOSE, 0, 0, 0, file->trace_arg_name); + + if (file->is_deleted) { + spdk_fs_delete_file_async(file->fs, file->name, blob_delete_cb, ctx); + return; + } + + args->fn.file_op(args->arg, bserrno); + free_fs_request(req); +} + +static void +__file_close_async(struct spdk_file *file, struct spdk_fs_request *req) +{ + struct spdk_blob *blob; + + pthread_spin_lock(&file->lock); + if (file->ref_count == 0) { + pthread_spin_unlock(&file->lock); + __file_close_async_done(req, -EBADF); + return; + } + + file->ref_count--; + if (file->ref_count > 0) { + pthread_spin_unlock(&file->lock); + req->args.fn.file_op(req->args.arg, 0); + free_fs_request(req); + return; + } + + pthread_spin_unlock(&file->lock); + + blob = file->blob; + file->blob = NULL; + spdk_blob_close(blob, __file_close_async_done, req); +} + +static void +__file_close_async__sync_done(void *arg, int fserrno) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + + __file_close_async(args->file, req); +} + +void +spdk_file_close_async(struct spdk_file *file, spdk_file_op_complete cb_fn, void *cb_arg) +{ + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + req = alloc_fs_request(file->fs->md_target.md_fs_channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate close async req for file=%s\n", file->name); + cb_fn(cb_arg, -ENOMEM); + return; + } + + args = &req->args; + args->file = file; + args->fn.file_op = cb_fn; + args->arg = cb_arg; + + spdk_file_sync_async(file, file->fs->md_target.md_io_channel, __file_close_async__sync_done, req); +} + +static void +__file_close(void *arg) +{ + struct spdk_fs_request *req = arg; + struct spdk_fs_cb_args *args = &req->args; + struct spdk_file *file = args->file; + + __file_close_async(file, req); +} + +int +spdk_file_close(struct spdk_file *file, struct spdk_fs_thread_ctx *ctx) +{ + struct spdk_fs_channel *channel = (struct spdk_fs_channel *)ctx; + struct spdk_fs_request *req; + struct spdk_fs_cb_args *args; + + req = alloc_fs_request(channel); + if (req == NULL) { + SPDK_ERRLOG("Cannot allocate close req for file=%s\n", file->name); + return -ENOMEM; + } + + args = &req->args; + + spdk_file_sync(file, ctx); + BLOBFS_TRACE(file, "name=%s\n", file->name); + args->file = file; + args->sem = &channel->sem; + args->fn.file_op = __wake_caller; + args->arg = args; + channel->send_request(__file_close, req); + sem_wait(&channel->sem); + + return args->rc; +} + +int +spdk_file_get_id(struct spdk_file *file, void *id, size_t size) +{ + if (size < sizeof(spdk_blob_id)) { + return -EINVAL; + } + + memcpy(id, &file->blobid, sizeof(spdk_blob_id)); + + return sizeof(spdk_blob_id); +} + +static void +_file_free(void *ctx) +{ + struct spdk_file *file = ctx; + + TAILQ_REMOVE(&g_caches, file, cache_tailq); + + free(file->name); + free(file->tree); + free(file); +} + +static void +file_free(struct spdk_file *file) +{ + BLOBFS_TRACE(file, "free=%s\n", file->name); + pthread_spin_lock(&file->lock); + if (file->tree->present_mask == 0) { + pthread_spin_unlock(&file->lock); + free(file->name); + free(file->tree); + free(file); + return; + } + + tree_free_buffers(file->tree); + assert(file->tree->present_mask == 0); + spdk_thread_send_msg(g_cache_pool_thread, _file_free, file); + pthread_spin_unlock(&file->lock); +} + +SPDK_LOG_REGISTER_COMPONENT("blobfs", SPDK_LOG_BLOBFS) +SPDK_LOG_REGISTER_COMPONENT("blobfs_rw", SPDK_LOG_BLOBFS_RW) |