ceph: use I_COMPLETE inode flag instead of D_COMPLETE flag
commit c6ffe10015 moved the flag that tracks if the dcache contents
for a directory are complete to dentry. The problem is there are
lots of places that use ceph_dir_{set,clear,test}_complete() while
holding i_ceph_lock. but ceph_dir_{set,clear,test}_complete() may
sleep because they call dput().
This patch basically reverts that commit. For ceph_d_prune(), it's
called with both the dentry to prune and the parent dentry are
locked. So it's safe to access the parent dentry's d_inode and
clear I_COMPLETE flag.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Greg Farnum <greg@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 851814d..be2f262 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -561,7 +561,6 @@
struct ceph_inode_info *ci = ceph_inode(inode);
int i;
int issued = 0, implemented;
- int updating_inode = 0;
struct timespec mtime, atime, ctime;
u32 nsplits;
struct ceph_buffer *xattr_blob = NULL;
@@ -601,7 +600,6 @@
(ci->i_version & ~1) >= le64_to_cpu(info->version))
goto no_change;
- updating_inode = 1;
issued = __ceph_caps_issued(ci, &implemented);
issued |= implemented | __ceph_caps_dirty(ci);
@@ -717,6 +715,17 @@
ceph_vinop(inode), inode->i_mode);
}
+ /* set dir completion flag? */
+ if (S_ISDIR(inode->i_mode) &&
+ ci->i_files == 0 && ci->i_subdirs == 0 &&
+ ceph_snap(inode) == CEPH_NOSNAP &&
+ (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
+ (issued & CEPH_CAP_FILE_EXCL) == 0 &&
+ (ci->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
+ dout(" marking %p complete (empty)\n", inode);
+ ci->i_ceph_flags |= CEPH_I_COMPLETE;
+ ci->i_max_offset = 2;
+ }
no_change:
spin_unlock(&ci->i_ceph_lock);
@@ -767,19 +776,6 @@
__ceph_get_fmode(ci, cap_fmode);
}
- /* set dir completion flag? */
- if (S_ISDIR(inode->i_mode) &&
- updating_inode && /* didn't jump to no_change */
- ci->i_files == 0 && ci->i_subdirs == 0 &&
- ceph_snap(inode) == CEPH_NOSNAP &&
- (le32_to_cpu(info->cap.caps) & CEPH_CAP_FILE_SHARED) &&
- (issued & CEPH_CAP_FILE_EXCL) == 0 &&
- !ceph_dir_test_complete(inode)) {
- dout(" marking %p complete (empty)\n", inode);
- ceph_dir_set_complete(inode);
- ci->i_max_offset = 2;
- }
-
/* update delegation info? */
if (dirinfo)
ceph_fill_dirfrag(inode, dirinfo);
@@ -861,7 +857,7 @@
di = ceph_dentry(dn);
spin_lock(&ci->i_ceph_lock);
- if (!ceph_dir_test_complete(inode)) {
+ if ((ceph_inode(inode)->i_ceph_flags & CEPH_I_COMPLETE) == 0) {
spin_unlock(&ci->i_ceph_lock);
return;
}
@@ -1066,7 +1062,7 @@
* d_move() puts the renamed dentry at the end of
* d_subdirs. We need to assign it an appropriate
* directory offset so we can behave when holding
- * D_COMPLETE.
+ * I_COMPLETE.
*/
ceph_set_dentry_offset(req->r_old_dentry);
dout("dn %p gets new offset %lld\n", req->r_old_dentry,