diff options
Diffstat (limited to 'xlators/cluster/dht/src/dht-rename.c')
| -rw-r--r-- | xlators/cluster/dht/src/dht-rename.c | 130 |
1 files changed, 94 insertions, 36 deletions
diff --git a/xlators/cluster/dht/src/dht-rename.c b/xlators/cluster/dht/src/dht-rename.c index 664864919b1..6587aa89984 100644 --- a/xlators/cluster/dht/src/dht-rename.c +++ b/xlators/cluster/dht/src/dht-rename.c @@ -848,9 +848,8 @@ dht_do_rename (call_frame_t *frame) return 0; } - int -dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, +dht_rename_link_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, inode_t *inode, struct iatt *stbuf, struct iatt *preparent, struct iatt *postparent, @@ -858,8 +857,6 @@ dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, { dht_local_t *local = NULL; call_frame_t *prev = NULL; - int this_call_cnt = 0; - local = frame->local; prev = cookie; @@ -869,34 +866,85 @@ dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, "link/file on %s failed (%s)", prev->this->name, strerror (op_errno)); local->op_ret = -1; - if (op_errno != ENOENT) { - local->op_errno = op_errno; - if (prev->this == local->src_cached) { - local->added_link = _gf_false; - } - } - } else if (local->src_cached == prev->this) { - /* merge of attr returned only from linkfile creation */ + local->op_errno = op_errno; + local->added_link = _gf_false; + } else dht_iatt_merge (this, &local->stbuf, stbuf, prev->this); + + if (local->op_ret == -1) + goto cleanup; + + dht_do_rename (frame); + + return 0; + +cleanup: + dht_rename_cleanup (frame); + + return 0; +} + +int +dht_rename_linkto_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, + inode_t *inode, struct iatt *stbuf, + struct iatt *preparent, struct iatt *postparent, + dict_t *xdata) +{ + dht_local_t *local = NULL; + call_frame_t *prev = NULL; + xlator_t *src_cached = NULL; + dict_t *xattr = NULL; + + DHT_MARK_FOP_INTERNAL (xattr); + + local = frame->local; + prev = cookie; + + src_cached = local->src_cached; + + if (op_ret == -1) { + gf_msg_debug (this->name, 0, + "link/file on %s failed (%s)", + prev->this->name, strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; } - this_call_cnt = dht_frame_return (frame); - if (is_last_call (this_call_cnt)) { - if (local->op_ret == -1) - goto cleanup; + /* If linkto creation failed move to failure cleanup code, + * instead of continuing with creating the link file */ + if (local->op_ret != 0) { + goto cleanup; + } - dht_do_rename (frame); + gf_msg_trace (this->name, 0, + "link %s => %s (%s)", local->loc.path, + local->loc2.path, src_cached->name); + if (uuid_compare (local->loc.pargfid, + local->loc2.pargfid) == 0) { + DHT_MARKER_DONT_ACCOUNT(xattr); } + local->added_link = _gf_true; + + STACK_WIND (frame, dht_rename_link_cbk, + src_cached, src_cached->fops->link, + &local->loc, &local->loc2, xattr); + + if (xattr) + dict_unref (xattr); + return 0; cleanup: dht_rename_cleanup (frame); + if (xattr) + dict_unref (xattr); + return 0; } - int dht_rename_unlink_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, int32_t op_ret, int32_t op_errno, @@ -978,45 +1026,55 @@ dht_rename_create_links (call_frame_t *frame) return 0; } - if (dst_hashed != src_hashed && dst_hashed != src_cached) + if (src_cached != dst_hashed) { + /* needed to create the link file */ call_cnt++; + if (dst_hashed != src_hashed) + /* needed to create the linkto file */ + call_cnt ++; + } - if (src_cached != dst_hashed) - call_cnt++; - - local->call_cnt = call_cnt; - - if (dst_hashed != src_hashed && dst_hashed != src_cached) { + /* We should not have any failures post the link creation, as this + * introduces the newname into the namespace. Clients could have cached + * the existence of the newname and may start taking actions based on + * the same. Hence create the linkto first, and then attempt the link. + * + * NOTE: If another client is attempting the same oldname -> newname + * rename, and finds both file names as existing, and are hard links + * to each other, then FUSE would send in an unlink for oldname. In + * this time duration if we treat the linkto as a critical error and + * unlink the newname we created, we would have effectively lost the + * file to rename operations. */ + if (dst_hashed != src_hashed && src_cached != dst_hashed) { gf_msg_trace (this->name, 0, "linkfile %s @ %s => %s", local->loc.path, dst_hashed->name, src_cached->name); memcpy (local->gfid, local->loc.inode->gfid, 16); - dht_linkfile_create (frame, dht_rename_links_cbk, this, - src_cached, dst_hashed, &local->loc); - } - - if (src_cached != dst_hashed) { + dht_linkfile_create (frame, dht_rename_linkto_cbk, this, + src_cached, dst_hashed, &local->loc); + } else if (src_cached != dst_hashed) { dict_t *xattr_new = NULL; xattr_new = dict_copy_with_ref (xattr, NULL); - gf_msg_trace (this->name, 0, + gf_msg_trace (this->name, 0, "link %s => %s (%s)", local->loc.path, - local->loc2.path, src_cached->name); + local->loc2.path, src_cached->name); if (uuid_compare (local->loc.pargfid, local->loc2.pargfid) == 0) { DHT_MARKER_DONT_ACCOUNT(xattr_new); } local->added_link = _gf_true; - STACK_WIND (frame, dht_rename_links_cbk, - src_cached, src_cached->fops->link, - &local->loc, &local->loc2, xattr_new); + + STACK_WIND (frame, dht_rename_link_cbk, + src_cached, src_cached->fops->link, + &local->loc, &local->loc2, xattr_new); dict_unref (xattr_new); - } + } nolinks: if (!call_cnt) { |