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ceph: initialize root dentry 

Set up d_fsdata on the root dentry.  This fixes a NULL pointer dereference
in ceph_d_prune on umount.  It also means we can eventually strip out all
of the conditional checks on d_fsdata because it is now set unconditionally
(prior to setting up the d_ops).

Fix the ceph_d_prune debug print while we're here.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2011-11-11 09:48:08 -08:00
parent 15a2015fbc
commit 774ac21da7
2 changed files with 5 additions and 3 deletions
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2
fs/ceph/dir.c
View File

@ -1143,7 +1143,7 @@ static void ceph_d_prune(struct dentry *dentry)
{ {
struct ceph_dentry_info *di; struct ceph_dentry_info *di;
dout("d_release %p\n", dentry); dout("ceph_d_prune %p\n", dentry);
/* do we have a valid parent? */ /* do we have a valid parent? */
if (!dentry->d_parent || IS_ROOT(dentry)) if (!dentry->d_parent || IS_ROOT(dentry))

6
fs/ceph/super.c
View File

@ -638,10 +638,12 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc,
if (err == 0) { if (err == 0) {
dout("open_root_inode success\n"); dout("open_root_inode success\n");
if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT &&
fsc->sb->s_root == NULL) fsc->sb->s_root == NULL) {
root = d_alloc_root(req->r_target_inode); root = d_alloc_root(req->r_target_inode);
else ceph_init_dentry(root);
} else {
root = d_obtain_alias(req->r_target_inode); root = d_obtain_alias(req->r_target_inode);
}
req->r_target_inode = NULL; req->r_target_inode = NULL;
dout("open_root_inode success, root dentry is %p\n", root); dout("open_root_inode success, root dentry is %p\n", root);
} else { } else {