diff options
| author | shishir gowda <sgowda@redhat.com> | 2013-02-14 13:04:58 +0530 |
|---|---|---|
| committer | Vijay Bellur <vbellur@redhat.com> | 2013-03-04 02:42:30 -0800 |
| commit | cd4736baba8a60d007bff6ed633f9feba9862bfb (patch) | |
| tree | d11abb8bdbe588cb2f79546e0b0b6d0aebf66878 | |
| parent | 184adfd07e437d9531ebea88208d14c11f51137e (diff) | |
cluster/distribute: Reopen fds in migration internally as root:root
Though linkfile_create and rebalance dst file create sent a setattr
with correct ownership, there is still a race window where the linkfile
open (client open due to migration) will fail, as its ownership will be
root:root.
BUG: 884597
Change-Id: Iba73681eae4f280d39ee6c9a40009e195768bee7
Signed-off-by: shishir gowda <sgowda@redhat.com>
Reviewed-on: http://review.gluster.org/4612
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
| -rw-r--r-- | xlators/cluster/dht/src/dht-helper.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/xlators/cluster/dht/src/dht-helper.c b/xlators/cluster/dht/src/dht-helper.c index 9e71c6033..ecd06e394 100644 --- a/xlators/cluster/dht/src/dht-helper.c +++ b/xlators/cluster/dht/src/dht-helper.c @@ -731,6 +731,10 @@ dht_migration_complete_check_task (void *data) goto out; } + /* perform open as root:root. There is window between linkfile + * creation(root:root) and setattr with the correct uid/gid + */ + SYNCTASK_SETID(0, 0); /* if 'local->fd' (ie, fd based operation), send a 'open()' on destination if not already done */ if (local->loc.inode) { @@ -746,6 +750,7 @@ dht_migration_complete_check_task (void *data) GF_FREE (path); } + SYNCTASK_SETID (frame->root->uid, frame->root->gid); if (ret == -1) { gf_log (this->name, GF_LOG_ERROR, "%s: failed to send open() on target file at %s", @@ -853,7 +858,10 @@ dht_rebalance_inprogress_task (void *data) } ret = 0; - + /* perform open as root:root. There is window between linkfile + * creation(root:root) and setattr with the correct uid/gid + */ + SYNCTASK_SETID (0, 0); if (local->loc.inode) { ret = syncop_open (dst_node, &local->loc, local->fd->flags, local->fd); @@ -874,6 +882,7 @@ dht_rebalance_inprogress_task (void *data) goto out; } + SYNCTASK_SETID (frame->root->uid, frame->root->gid); ret = fd_ctx_set (local->fd, this, (uint64_t)(long)dst_node); if (ret) { gf_log (this->name, GF_LOG_ERROR, |