diff options
| -rw-r--r-- | xlators/performance/quick-read/src/quick-read.c | 201 | ||||
| -rw-r--r-- | xlators/performance/quick-read/src/quick-read.h | 18 |
2 files changed, 219 insertions, 0 deletions
diff --git a/xlators/performance/quick-read/src/quick-read.c b/xlators/performance/quick-read/src/quick-read.c index 0e1ef147b..959d4baf0 100644 --- a/xlators/performance/quick-read/src/quick-read.c +++ b/xlators/performance/quick-read/src/quick-read.c @@ -19,6 +19,23 @@ #include "quick-read.h" + +static void +qr_fd_ctx_free (qr_fd_ctx_t *qr_fd_ctx) +{ + if (qr_fd_ctx == NULL) { + goto out; + } + + assert (list_empty (&qr_fd_ctx->waiting_ops)); + + FREE (qr_fd_ctx->path); + FREE (qr_fd_ctx); + +out: + return; +} + int32_t qr_lookup_cbk (call_frame_t *frame, void *cookie, xlator_t *this, @@ -156,6 +173,189 @@ unwind: } +int32_t +qr_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, + int32_t op_errno, fd_t *fd) +{ + uint64_t value = 0; + int32_t ret = -1; + struct list_head waiting_ops; + qr_local_t *local = NULL; + qr_file_t *qr_file = NULL; + qr_fd_ctx_t *qr_fd_ctx = NULL; + call_stub_t *stub = NULL, *tmp = NULL; + + local = frame->local; + INIT_LIST_HEAD (&waiting_ops); + + ret = fd_ctx_get (fd, this, &value); + if ((ret == -1) && (op_ret != -1)) { + op_ret = -1; + op_errno = EINVAL; + goto out; + } + + if (value) { + qr_fd_ctx = (qr_fd_ctx_t *) (long)value; + } + + if (qr_fd_ctx) { + LOCK (&qr_fd_ctx->lock); + { + qr_fd_ctx->open_in_transit = 0; + + if (op_ret == 0) { + qr_fd_ctx->opened = 1; + } + list_splice_init (&qr_fd_ctx->waiting_ops, + &waiting_ops); + } + UNLOCK (&qr_fd_ctx->lock); + + if (local && local->is_open + && ((local->open_flags & O_TRUNC) == O_TRUNC)) { + ret = inode_ctx_get (fd->inode, this, &value); + if (ret == 0) { + qr_file = (qr_file_t *)(long) value; + + if (qr_file) { + LOCK (&qr_file->lock); + { + dict_unref (qr_file->xattr); + qr_file->xattr = NULL; + } + UNLOCK (&qr_file->lock); + } + } + } + + if (!list_empty (&waiting_ops)) { + list_for_each_entry_safe (stub, tmp, &waiting_ops, + list) { + list_del_init (&stub->list); + call_resume (stub); + } + } + } +out: + if (local && local->is_open) { + STACK_UNWIND (frame, op_ret, op_errno, fd); + } + + return 0; +} + + +int32_t +qr_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags, + fd_t *fd) +{ + qr_file_t *qr_file = NULL; + int32_t ret = -1; + uint64_t filep = 0; + char content_cached = 0; + qr_fd_ctx_t *qr_fd_ctx = NULL; + int32_t op_ret = -1, op_errno = -1; + qr_local_t *local = NULL; + qr_conf_t *conf = NULL; + + conf = this->private; + + qr_fd_ctx = CALLOC (1, sizeof (*qr_fd_ctx)); + if (qr_fd_ctx == NULL) { + op_ret = -1; + op_errno = ENOMEM; + gf_log (this->name, GF_LOG_ERROR, "out of memory"); + goto unwind; + } + + LOCK_INIT (&qr_fd_ctx->lock); + INIT_LIST_HEAD (&qr_fd_ctx->waiting_ops); + + qr_fd_ctx->path = strdup (loc->path); + qr_fd_ctx->flags = flags; + + ret = fd_ctx_set (fd, this, (uint64_t)(long)qr_fd_ctx); + if (ret == -1) { + op_ret = -1; + op_errno = EINVAL; + goto unwind; + } + + local = CALLOC (1, sizeof (*local)); + if (local == NULL) { + op_ret = -1; + op_errno = ENOMEM; + gf_log (this->name, GF_LOG_ERROR, "out of memory"); + goto unwind; + } + + local->is_open = 1; + local->open_flags = flags; + frame->local = local; + local = NULL; + + ret = inode_ctx_get (fd->inode, this, &filep); + if (ret == 0) { + qr_file = (qr_file_t *)(long) filep; + if (qr_file) { + LOCK (&qr_file->lock); + { + if (qr_file->xattr) { + content_cached = 1; + } + } + UNLOCK (&qr_file->lock); + } + } + + if (content_cached && ((flags & O_DIRECTORY) == O_DIRECTORY)) { + op_ret = -1; + op_errno = ENOTDIR; + qr_fd_ctx = NULL; + goto unwind; + } + + if (!content_cached || ((flags & O_WRONLY) == O_WRONLY) + || ((flags & O_TRUNC) == O_TRUNC)) { + LOCK (&qr_fd_ctx->lock); + { + /* + * we need not set this flag, since open is not yet + * unwounded. + */ + + qr_fd_ctx->open_in_transit = 1; + } + UNLOCK (&qr_fd_ctx->lock); + goto wind; + } else { + op_ret = 0; + op_errno = 0; + goto unwind; + } + +unwind: + if (op_ret == -1) { + if (qr_fd_ctx != NULL) { + qr_fd_ctx_free (qr_fd_ctx); + } + + if (local != NULL) { + FREE (local); + } + } + + STACK_UNWIND (frame, op_ret, op_errno, fd); + return 0; + +wind: + STACK_WIND (frame, qr_open_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, loc, flags, fd); + return 0; +} + + int32_t init (xlator_t *this) { @@ -229,6 +429,7 @@ fini (xlator_t *this) struct xlator_fops fops = { .lookup = qr_lookup, + .open = qr_open, }; diff --git a/xlators/performance/quick-read/src/quick-read.h b/xlators/performance/quick-read/src/quick-read.h index 44db76243..32bebac48 100644 --- a/xlators/performance/quick-read/src/quick-read.h +++ b/xlators/performance/quick-read/src/quick-read.h @@ -43,6 +43,24 @@ #define GLUSTERFS_CONTENT_KEY "glusterfs.content" +struct qr_fd_ctx { + char opened; + char open_in_transit; + char *path; + int flags; + struct list_head waiting_ops; + gf_lock_t lock; +}; +typedef struct qr_fd_ctx qr_fd_ctx_t; + +struct qr_local { + char is_open; + fd_t *fd; + int open_flags; + call_stub_t *stub; +}; +typedef struct qr_local qr_local_t; + struct qr_file { dict_t *xattr; struct stat stbuf; |