diff options
| -rw-r--r-- | xlators/performance/stat-prefetch/src/stat-prefetch.c | 120 |
1 files changed, 106 insertions, 14 deletions
diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.c b/xlators/performance/stat-prefetch/src/stat-prefetch.c index e20b9964520..a1322ee4759 100644 --- a/xlators/performance/stat-prefetch/src/stat-prefetch.c +++ b/xlators/performance/stat-prefetch/src/stat-prefetch.c @@ -787,6 +787,77 @@ sp_is_empty (dict_t *this, char *key, data_t *value, void *data) } } + +int32_t +sp_lookup_helper (call_frame_t *frame,xlator_t *this, loc_t *loc, + dict_t *xattr_req) +{ + uint64_t value = 0; + sp_inode_ctx_t *inode_ctx = NULL; + int32_t ret = 0, op_ret = -1, op_errno = -1; + call_stub_t *stub = NULL; + char can_wind = 0; + + ret = inode_ctx_get (loc->inode, this, &value); + if (ret == -1) { + gf_log (this->name, GF_LOG_DEBUG, "context not set in inode " + "(%p)", loc->inode); + op_errno = EINVAL; + goto unwind; + } + + inode_ctx = (sp_inode_ctx_t *)(long) value; + GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, inode_ctx, unwind, op_errno, + EINVAL); + + stub = fop_lookup_stub (frame, sp_lookup_helper, loc, + xattr_req); + GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind, + op_errno, ENOMEM); + + LOCK (&inode_ctx->lock); + { + op_ret = inode_ctx->op_ret; + op_errno = inode_ctx->op_errno; + if (op_ret == 0) { + if (!inode_ctx->lookup_in_progress) { + inode_ctx->lookup_in_progress = 1; + can_wind = 1; + } else { + list_add_tail (&stub->list, + &inode_ctx->waiting_ops); + stub = NULL; + } + } + } + UNLOCK (&inode_ctx->lock); + + if (op_ret == -1) { + goto unwind; + } + + if (can_wind) { + STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, loc, + xattr_req); + } + + if (stub != NULL) { + call_stub_destroy (stub); + } + + return 0; + +unwind: + SP_STACK_UNWIND (lookup, frame, -1, op_errno, NULL, NULL, NULL, NULL); + if (stub != NULL) { + call_stub_destroy (stub); + } + + return 0; +} + + /* * TODO: implement sending lookups for every fop done on this path. As of now * lookup on the path is sent only for the first fop on this path. @@ -797,12 +868,13 @@ sp_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req) gf_dirent_t *dirent = NULL; char entry_cached = 0; uint64_t value = 0; - char xattr_req_empty = 1; + char xattr_req_empty = 1, can_wind = 0; sp_cache_t *cache = NULL; struct stat postparent = {0, }, buf = {0, }; int32_t ret = -1, op_ret = -1, op_errno = EINVAL; sp_inode_ctx_t *inode_ctx = NULL, *parent_inode_ctx = NULL; sp_local_t *local = NULL; + call_stub_t *stub = NULL; if (loc == NULL || loc->inode == NULL) { goto unwind; @@ -880,7 +952,7 @@ sp_lookup (call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *xattr_req) } } -wind: +wind: if (entry_cached) { if (cache) { cache->hits++; @@ -892,19 +964,15 @@ wind: sp_cache_unref (cache); } - LOCK (&inode_ctx->lock); - { - if (!(inode_ctx->looked_up - || inode_ctx->lookup_in_progress)) { - inode_ctx->lookup_in_progress = 1; - } - } - UNLOCK (&inode_ctx->lock); + stub = fop_lookup_stub (frame, sp_lookup_helper, loc, + xattr_req); + GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, stub, unwind, + op_errno, ENOMEM); local = CALLOC (1, sizeof (*local)); GF_VALIDATE_OR_GOTO_WITH_ERROR (this->name, local, unwind, op_errno, ENOMEM); - + frame->local = local; ret = loc_copy (&local->loc, loc); @@ -917,9 +985,33 @@ wind: local->is_lookup = 1; - STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this), - FIRST_CHILD(this)->fops->lookup, loc, xattr_req); - + LOCK (&inode_ctx->lock); + { + if (inode_ctx->lookup_in_progress) { + list_add_tail (&stub->list, + &inode_ctx->waiting_ops); + stub = NULL; + } else { + can_wind = 1; + } + + if (!(inode_ctx->looked_up + || inode_ctx->lookup_in_progress)) { + inode_ctx->lookup_in_progress = 1; + } + } + UNLOCK (&inode_ctx->lock); + + if (can_wind) { + STACK_WIND (frame, sp_lookup_cbk, FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, loc, + xattr_req); + } + + if (stub != NULL) { + call_stub_destroy (stub); + } + return 0; } |