diff options
Diffstat (limited to 'xlators/mount/fuse/src/fuse-resolve.c')
| -rw-r--r-- | xlators/mount/fuse/src/fuse-resolve.c | 400 |
1 files changed, 112 insertions, 288 deletions
diff --git a/xlators/mount/fuse/src/fuse-resolve.c b/xlators/mount/fuse/src/fuse-resolve.c index 33606f87919..755e2f429f1 100644 --- a/xlators/mount/fuse/src/fuse-resolve.c +++ b/xlators/mount/fuse/src/fuse-resolve.c @@ -26,375 +26,203 @@ static int fuse_resolve_all (fuse_state_t *state); -static int -fuse_resolve_path_simple (fuse_state_t *state); - -static int -component_count (const char *path) -{ - int count = 0; - const char *trav = NULL; - - for (trav = path; *trav; trav++) { - if (*trav == '/') - count++; - } - - return count + 2; -} - -static int -prepare_components (fuse_state_t *state) -{ - fuse_resolve_t *resolve = NULL; - char *resolved = NULL; - struct fuse_resolve_comp *components = NULL; - char *trav = NULL; - int count = 0; - int i = 0; - - resolve = state->resolve_now; - - resolved = gf_strdup (resolve->path); - resolve->resolved = resolved; - - count = component_count (resolve->path); - components = GF_CALLOC (sizeof (*components), count, 0); //TODO - if (!components) - goto out; - resolve->components = components; - - components[0].basename = ""; - components[0].ino = 1; - components[0].gen = 0; - components[0].inode = inode_ref (state->itable->root); - - i = 1; - for (trav = resolved; *trav; trav++) { - if (*trav == '/') { - components[i].basename = trav + 1; - *trav = 0; - i++; - } - } -out: - return 0; -} +int fuse_resolve_continue (fuse_state_t *state); +int fuse_resolve_entry_simple (fuse_state_t *state); +int fuse_resolve_inode_simple (fuse_state_t *state); static int fuse_resolve_loc_touchup (fuse_state_t *state) { fuse_resolve_t *resolve = NULL; - loc_t *loc = NULL; - char *path = NULL; - int ret = 0; + loc_t *loc = NULL; + char *path = NULL; + int ret = 0; resolve = state->resolve_now; loc = state->loc_now; if (!loc->path) { - if (loc->parent) { + if (loc->parent && resolve->bname) { ret = inode_path (loc->parent, resolve->bname, &path); } else if (loc->inode) { ret = inode_path (loc->inode, NULL, &path); } if (ret) - gf_log ("", GF_LOG_TRACE, + gf_log (THIS->name, GF_LOG_TRACE, "return value inode_path %d", ret); - - if (!path) - path = gf_strdup (resolve->path); - loc->path = path; } - loc->name = strrchr (loc->path, '/'); - if (loc->name) - loc->name++; - - if (!loc->parent && loc->inode) { - loc->parent = inode_parent (loc->inode, 0, NULL); - } - return 0; } -static int -fuse_resolve_newfd_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int32_t op_ret, int32_t op_errno, fd_t *fd) + +int +fuse_resolve_gfid_entry_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, + struct iatt *buf, dict_t *xattr, + struct iatt *postparent) { fuse_state_t *state = NULL; fuse_resolve_t *resolve = NULL; - fd_t *old_fd = NULL; - fd_t *tmp_fd = NULL; - fuse_fd_ctx_t *tmp_fd_ctx = 0; - uint64_t val = 0; - int ret = 0; + inode_t *link_inode = NULL; + loc_t *resolve_loc = NULL; state = frame->root->state; resolve = state->resolve_now; + resolve_loc = &resolve->resolve_loc; STACK_DESTROY (frame->root); if (op_ret == -1) { - resolve->op_ret = -1; - resolve->op_errno = op_errno; + gf_log (this->name, ((op_errno == ENOENT) ? GF_LOG_DEBUG : + GF_LOG_WARNING), + "%s/%s: failed to resolve (%s)", + uuid_utoa (resolve_loc->pargfid), resolve_loc->name, + strerror (op_errno)); goto out; } - old_fd = resolve->fd; - - state->fd = fd_ref (fd); - - fd_bind (fd); + link_inode = inode_link (inode, resolve_loc->parent, + resolve_loc->name, buf); - resolve->fd = NULL; + if (!link_inode) + goto out; - LOCK (&old_fd->lock); - { - ret = __fd_ctx_get (old_fd, state->this, &val); - if (!ret) { - tmp_fd_ctx = (fuse_fd_ctx_t *)(unsigned long)val; - tmp_fd = tmp_fd_ctx->fd; - if (tmp_fd) { - fd_unref (tmp_fd); - tmp_fd_ctx->fd = NULL; - } - } else { - tmp_fd_ctx = __fuse_fd_ctx_check_n_create (old_fd, - state->this); - } + inode_lookup (link_inode); - if (tmp_fd_ctx) { - tmp_fd_ctx->fd = fd; - } else { - gf_log ("resolve", GF_LOG_WARNING, - "failed to set the fd ctx with resolved fd"); - } - } - UNLOCK (&old_fd->lock); + inode_unref (link_inode); out: - fuse_resolve_all (state); - return 0; -} - -static void -fuse_resolve_new_fd (fuse_state_t *state) -{ - fuse_resolve_t *resolve = NULL; - fd_t *new_fd = NULL; - fd_t *fd = NULL; - - resolve = state->resolve_now; - fd = resolve->fd; - - new_fd = fd_create (state->loc.inode, state->finh->pid); - new_fd->flags = (fd->flags & ~O_TRUNC); - - gf_log ("resolve", GF_LOG_DEBUG, - "%"PRIu64": OPEN %s", state->finh->unique, - state->loc.path); - - FUSE_FOP (state, fuse_resolve_newfd_cbk, GF_FOP_OPEN, - open, &state->loc, new_fd->flags, new_fd, 0); -} - -static int -fuse_resolve_deep_continue (fuse_state_t *state) -{ - fuse_resolve_t *resolve = NULL; - int ret = 0; - - resolve = state->resolve_now; - - resolve->op_ret = 0; - resolve->op_errno = 0; - - if (resolve->path) - ret = fuse_resolve_path_simple (state); - if (ret) - gf_log ("resolve", GF_LOG_TRACE, - "return value of resolve_*_simple %d", ret); - - fuse_resolve_loc_touchup (state); - - /* This function is called by either fd resolve or inode resolve */ - if (!resolve->fd) - fuse_resolve_all (state); - else - fuse_resolve_new_fd (state); + loc_wipe (resolve_loc); + fuse_resolve_continue (state); return 0; } -static int -fuse_resolve_deep_cbk (call_frame_t *frame, void *cookie, xlator_t *this, - int op_ret, int op_errno, inode_t *inode, struct iatt *buf, - dict_t *xattr, struct iatt *postparent) +int +fuse_resolve_gfid_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int op_ret, int op_errno, inode_t *inode, struct iatt *buf, + dict_t *xattr, struct iatt *postparent) { - fuse_state_t *state = NULL; - fuse_resolve_t *resolve = NULL; - struct fuse_resolve_comp *components = NULL; - inode_t *link_inode = NULL; - int i = 0; + fuse_state_t *state = NULL; + fuse_resolve_t *resolve = NULL; + inode_t *link_inode = NULL; + loc_t *resolve_loc = NULL; state = frame->root->state; resolve = state->resolve_now; - components = resolve->components; - - i = (long) cookie; + resolve_loc = &resolve->resolve_loc; STACK_DESTROY (frame->root); if (op_ret == -1) { - goto get_out_of_here; + gf_log (this->name, ((op_errno == ENOENT) ? GF_LOG_DEBUG : + GF_LOG_WARNING), + "%s: failed to resolve (%s)", + uuid_utoa (resolve_loc->gfid), strerror (op_errno)); + loc_wipe (&resolve->resolve_loc); + goto out; } - if (i != 0) { - /* no linking for root inode */ - link_inode = inode_link (inode, resolve->deep_loc.parent, - resolve->deep_loc.name, buf); - components[i].inode = link_inode; - link_inode = NULL; - } + loc_wipe (resolve_loc); - loc_wipe (&resolve->deep_loc); - i++; /* next component */ + link_inode = inode_link (inode, NULL, NULL, buf); - if (!components[i].basename) { - /* all components of the path are resolved */ - goto get_out_of_here; + if (!link_inode) + goto out; + + inode_lookup (link_inode); + + if (uuid_is_null (resolve->pargfid)) { + inode_unref (link_inode); + goto out; } - /* join the current component with the path resolved until now */ - *(components[i].basename - 1) = '/'; + resolve_loc->parent = link_inode; + uuid_copy (resolve_loc->pargfid, resolve_loc->parent->gfid); - resolve->deep_loc.path = gf_strdup (resolve->resolved); - resolve->deep_loc.parent = inode_ref (components[i-1].inode); - resolve->deep_loc.inode = inode_new (state->itable); - resolve->deep_loc.name = components[i].basename; + resolve_loc->name = resolve->bname; - FUSE_FOP_COOKIE (state, state->itable->xl, fuse_resolve_deep_cbk, - (void *)(long)i, - GF_FOP_LOOKUP, lookup, &resolve->deep_loc, NULL); - return 0; + resolve_loc->inode = inode_new (state->itable); + inode_path (resolve_loc->parent, resolve_loc->name, + (char **) &resolve_loc->path); + + FUSE_FOP (state, fuse_resolve_gfid_entry_cbk, GF_FOP_LOOKUP, + lookup, &resolve->resolve_loc, NULL); -get_out_of_here: - fuse_resolve_deep_continue (state); + return 0; +out: + fuse_resolve_continue (state); return 0; } -static int -fuse_resolve_path_deep (fuse_state_t *state) +int +fuse_resolve_gfid (fuse_state_t *state) { - fuse_resolve_t *resolve = NULL; - struct fuse_resolve_comp *components = NULL; - inode_t *inode = NULL; - long i = 0; + fuse_resolve_t *resolve = NULL; + loc_t *resolve_loc = NULL; + int ret = 0; resolve = state->resolve_now; + resolve_loc = &resolve->resolve_loc; - prepare_components (state); - - components = resolve->components; - - /* start from the root */ - for (i = 1; components[i].basename; i++) { - *(components[i].basename - 1) = '/'; - inode = inode_grep (state->itable, components[i-1].inode, - components[i].basename); - if (!inode) - break; - components[i].inode = inode; + if (!uuid_is_null (resolve->pargfid)) { + uuid_copy (resolve_loc->gfid, resolve->pargfid); + resolve_loc->inode = inode_new (state->itable); + ret = inode_path (resolve_loc->inode, NULL, + (char **)&resolve_loc->path); + } else if (!uuid_is_null (resolve->gfid)) { + uuid_copy (resolve_loc->gfid, resolve->gfid); + resolve_loc->inode = inode_new (state->itable); + ret = inode_path (resolve_loc->inode, NULL, + (char **)&resolve_loc->path); + } + if (ret <= 0) { + gf_log (THIS->name, GF_LOG_WARNING, + "failed to get the path from inode %s", + uuid_utoa (resolve->gfid)); } - if (!components[i].basename) - goto resolved; - - resolve->deep_loc.path = gf_strdup (resolve->resolved); - resolve->deep_loc.parent = inode_ref (components[i-1].inode); - resolve->deep_loc.inode = inode_new (state->itable); - resolve->deep_loc.name = components[i].basename; - - FUSE_FOP_COOKIE (state, state->itable->xl, fuse_resolve_deep_cbk, - (void *)(long)i, - GF_FOP_LOOKUP, lookup, &resolve->deep_loc, NULL); + FUSE_FOP (state, fuse_resolve_gfid_cbk, GF_FOP_LOOKUP, + lookup, &resolve->resolve_loc, NULL); return 0; -resolved: - fuse_resolve_deep_continue (state); - return 0; } -static int -fuse_resolve_path_simple (fuse_state_t *state) +int +fuse_resolve_continue (fuse_state_t *state) { - fuse_resolve_t *resolve = NULL; - struct fuse_resolve_comp *components = NULL; - int ret = -1; - int par_idx = 0; - int ino_idx = 0; - int i = 0; + fuse_resolve_t *resolve = NULL; + int ret = 0; resolve = state->resolve_now; - components = resolve->components; - - if (!components) { - resolve->op_ret = -1; - resolve->op_errno = ENOENT; - goto out; - } - - for (i = 0; components[i].basename; i++) { - par_idx = ino_idx; - ino_idx = i; - } - - if (!components[par_idx].inode) { - resolve->op_ret = -1; - resolve->op_errno = ENOENT; - goto out; - } - - if (!components[ino_idx].inode && - (resolve->type == RESOLVE_MUST || resolve->type == RESOLVE_EXACT)) { - resolve->op_ret = -1; - resolve->op_errno = ENOENT; - goto out; - } - - if (components[ino_idx].inode && resolve->type == RESOLVE_NOT) { - resolve->op_ret = -1; - resolve->op_errno = EEXIST; - goto out; - } - if (components[ino_idx].inode) { - if (state->loc_now->inode) { - inode_unref (state->loc_now->inode); - } - - state->loc_now->inode = inode_ref (components[ino_idx].inode); - } + resolve->op_ret = 0; + resolve->op_errno = 0; - if (state->loc_now->parent) { - inode_unref (state->loc_now->parent); - } + /* TODO: should we handle 'fd' here ? */ + if (!uuid_is_null (resolve->pargfid)) + ret = fuse_resolve_entry_simple (state); + else if (!uuid_is_null (resolve->gfid)) + ret = fuse_resolve_inode_simple (state); + if (ret) + gf_log (THIS->name, GF_LOG_DEBUG, + "return value of resolve_*_simple %d", ret); - state->loc_now->parent = inode_ref (components[par_idx].inode); + fuse_resolve_loc_touchup (state); - ret = 0; + fuse_resolve_all (state); -out: - return ret; + return 0; } + /* Check if the requirements are fulfilled by entries in the inode cache itself Return value: @@ -445,6 +273,7 @@ fuse_resolve_entry_simple (fuse_state_t *state) } state->loc_now->inode = inode_ref (inode); + uuid_copy (state->loc_now->gfid, resolve->gfid); out: if (parent) @@ -468,7 +297,7 @@ fuse_resolve_entry (fuse_state_t *state) ret = fuse_resolve_entry_simple (state); if (ret > 0) { loc_wipe (loc); - fuse_resolve_path_deep (state); + fuse_resolve_gfid (state); return 0; } @@ -505,6 +334,7 @@ fuse_resolve_inode_simple (fuse_state_t *state) } state->loc_now->inode = inode_ref (inode); + uuid_copy (state->loc_now->gfid, resolve->gfid); out: if (inode) @@ -526,7 +356,7 @@ fuse_resolve_inode (fuse_state_t *state) if (ret > 0) { loc_wipe (loc); - fuse_resolve_path_deep (state); + fuse_resolve_gfid (state); return 0; } @@ -574,8 +404,6 @@ fuse_resolve_fd (fuse_state_t *state) state->loc_now = &state->loc; - fuse_resolve_path_deep (state); - out: return 0; } @@ -600,10 +428,6 @@ fuse_resolve (fuse_state_t *state) fuse_resolve_inode (state); - } else if (resolve->path) { - - fuse_resolve_path_deep (state); - } else { resolve->op_ret = 0; |