diff options
| author | Sage Weil <sage@newdream.net> | 2011-11-30 09:47:09 -0800 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-12-07 10:46:44 -0800 |
| commit | be655596b3de5873f994ddbe205751a5ffb4de39 (patch) | |
| tree | cf6e53c6344f87a47ac68d6a6ff4d7dac6e5c25e /fs/ceph/ioctl.c | |
| parent | 51703306b3b9ea7c05728040998521e47358147b (diff) | |
ceph: use i_ceph_lock instead of i_lock
We have been using i_lock to protect all kinds of data structures in the
ceph_inode_info struct, including lists of inodes that we need to iterate
over while avoiding races with inode destruction. That requires grabbing
a reference to the inode with the list lock protected, but igrab() now
takes i_lock to check the inode flags.
Changing the list lock ordering would be a painful process.
However, using a ceph-specific i_ceph_lock in the ceph inode instead of
i_lock is a simple mechanical change and avoids the ordering constraints
imposed by igrab().
Reported-by: Amon Ott <a.ott@m-privacy.de>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/ioctl.c')
| -rw-r--r-- | fs/ceph/ioctl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c index 5a14c29cbba..790914a598d 100644 --- a/fs/ceph/ioctl.c +++ b/fs/ceph/ioctl.c @@ -241,11 +241,11 @@ static long ceph_ioctl_lazyio(struct file *file) struct ceph_inode_info *ci = ceph_inode(inode); if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) { - spin_lock(&inode->i_lock); + spin_lock(&ci->i_ceph_lock); ci->i_nr_by_mode[fi->fmode]--; fi->fmode |= CEPH_FILE_MODE_LAZY; ci->i_nr_by_mode[fi->fmode]++; - spin_unlock(&inode->i_lock); + spin_unlock(&ci->i_ceph_lock); dout("ioctl_layzio: file %p marked lazy\n", file); ceph_check_caps(ci, 0, NULL); |