From 1a7e6053d3842761f946fbbdd693c72aa3945a97 Mon Sep 17 00:00:00 2001 From: shishir gowda Date: Thu, 16 May 2013 19:32:49 +0530 Subject: cluster/dht: Linkfiles creation with correct uid/gid If renames are done with different uid/gid (non-owners), then we would end up with incorrect uid/gid. The fix is to create linkfiles, and heal the uid/gid as root:root. This preserves our notion of creation as root:root and heal the uid/gid as root:root in all paths. Additionally, we need to consider uid/gid from only src_cached subvol, and not from linkfiles. rename is also done as root:root if done on linkfile, as setattr of ownership on linkfile is done after the rename BUG: 884597 Change-Id: Ifaacd8dba0f39cb909761ffc8fe7e06cd44ec8de Signed-off-by: shishir gowda Reviewed-on: http://review.gluster.org/5025 Tested-by: Gluster Build System Reviewed-by: Vijay Bellur --- xlators/cluster/dht/src/dht-linkfile.c | 7 ++++ xlators/cluster/dht/src/dht-rename.c | 60 ++++++++++++++++++++++------------ 2 files changed, 47 insertions(+), 20 deletions(-) (limited to 'xlators') diff --git a/xlators/cluster/dht/src/dht-linkfile.c b/xlators/cluster/dht/src/dht-linkfile.c index 67d6ce583a9..9de3703410a 100644 --- a/xlators/cluster/dht/src/dht-linkfile.c +++ b/xlators/cluster/dht/src/dht-linkfile.c @@ -34,6 +34,8 @@ dht_linkfile_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, if (!op_ret) local->linked = _gf_true; + FRAME_SU_UNDO (frame, dht_local_t); + local->linkfile.linkfile_cbk (frame, cookie, this, op_ret, op_errno, inode, stbuf, preparent, postparent, xdata); @@ -87,6 +89,9 @@ dht_linkfile_create (call_frame_t *frame, fop_mknod_cbk_t linkfile_cbk, } local->link_subvol = fromvol; + /* Always create as root:root. dht_linkfile_attr_heal fixes the + * ownsership */ + FRAME_SU_DO (frame, dht_local_t); STACK_WIND (frame, dht_linkfile_create_cbk, fromvol, fromvol->fops->mknod, loc, S_IFREG | DHT_LINKFILE_MODE, 0, 0, dict); @@ -252,6 +257,8 @@ dht_linkfile_attr_heal (call_frame_t *frame, xlator_t *this) copy->local = copy_local; + FRAME_SU_DO (copy, dht_local_t); + STACK_WIND (copy, dht_linkfile_setattr_cbk, subvol, subvol->fops->setattr, ©_local->loc, &stbuf, (GF_SET_ATTR_UID | GF_SET_ATTR_GID), NULL); diff --git a/xlators/cluster/dht/src/dht-rename.c b/xlators/cluster/dht/src/dht-rename.c index 35fedeaa7a4..f0eecb2d7ab 100644 --- a/xlators/cluster/dht/src/dht-rename.c +++ b/xlators/cluster/dht/src/dht-rename.c @@ -307,6 +307,25 @@ err: return 0; } +int +dht_rename_done (call_frame_t *frame, xlator_t *this) +{ + dht_local_t *local = NULL; + + local = frame->local; + + if (local->linked == _gf_true) { + local->linked = _gf_false; + dht_linkfile_attr_heal (frame, this); + } + DHT_STRIP_PHASE1_FLAGS (&local->stbuf); + DHT_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, + &local->stbuf, &local->preoldparent, + &local->postoldparent, &local->preparent, + &local->postparent, NULL); + + return 0; +} int dht_rename_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, @@ -340,11 +359,7 @@ dht_rename_unlink_cbk (call_frame_t *frame, void *cookie, xlator_t *this, WIPE (&local->postparent); if (is_last_call (this_call_cnt)) { - DHT_STRIP_PHASE1_FLAGS (&local->stbuf); - DHT_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, - &local->stbuf, &local->preoldparent, - &local->postoldparent, &local->preparent, - &local->postparent, NULL); + dht_rename_done (frame, this); } out: @@ -476,6 +491,8 @@ dht_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this, dst_hashed = local->dst_hashed; dst_cached = local->dst_cached; + if (local->linked == _gf_true) + FRAME_SU_UNDO (frame, dht_local_t); if (op_ret == -1) { gf_log (this->name, GF_LOG_WARNING, "%s: rename on %s failed (%s)", local->loc.path, @@ -509,17 +526,21 @@ dht_rename_cbk (call_frame_t *frame, void *cookie, xlator_t *this, } err: - dht_iatt_merge (this, &local->stbuf, stbuf, prev->this); - dht_iatt_merge (this, &local->preoldparent, preoldparent, prev->this); - dht_iatt_merge (this, &local->postoldparent, postoldparent, prev->this); - dht_iatt_merge (this, &local->preparent, prenewparent, prev->this); - dht_iatt_merge (this, &local->postparent, postnewparent, prev->this); - - if (local->linked == _gf_true) { - local->linked = _gf_false; - dht_linkfile_attr_heal (frame, this); + /* Merge attrs only from src_cached. In case there of src_cached != + * dst_hashed, this ignores linkfile attrs. */ + if (prev->this == src_cached) { + dht_iatt_merge (this, &local->stbuf, stbuf, prev->this); + dht_iatt_merge (this, &local->preoldparent, preoldparent, + prev->this); + dht_iatt_merge (this, &local->postoldparent, postoldparent, + prev->this); + dht_iatt_merge (this, &local->preparent, prenewparent, + prev->this); + dht_iatt_merge (this, &local->postparent, postnewparent, + prev->this); } + /* NOTE: rename_subvol is the same subvolume from which dht_rename_cbk * is called. since rename has already happened on rename_subvol, * unlink should not be sent for oldpath (either linkfile or cached-file) @@ -582,11 +603,7 @@ unwind: WIPE (&local->preparent); WIPE (&local->postparent); - DHT_STRIP_PHASE1_FLAGS (&local->stbuf); - DHT_STACK_UNWIND (rename, frame, local->op_ret, local->op_errno, - &local->stbuf, &local->preoldparent, - &local->postoldparent, &local->preparent, - &local->postparent, NULL); + dht_rename_done (frame, this); return 0; @@ -624,6 +641,8 @@ dht_do_rename (call_frame_t *frame) "renaming %s => %s (%s)", local->loc.path, local->loc2.path, rename_subvol->name); + if (local->linked == _gf_true) + FRAME_SU_DO (frame, dht_local_t); STACK_WIND (frame, dht_rename_cbk, rename_subvol, rename_subvol->fops->rename, &local->loc, &local->loc2, NULL); @@ -654,7 +673,8 @@ dht_rename_links_cbk (call_frame_t *frame, void *cookie, xlator_t *this, local->op_ret = -1; if (op_errno != ENOENT) local->op_errno = op_errno; - } else { + } else if (local->src_cached == prev->this) { + /* merge of attr returned only from linkfile creation */ dht_iatt_merge (this, &local->stbuf, stbuf, prev->this); } -- cgit