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authorJeff Layton <jlayton@kernel.org>2021-06-02 12:46:07 -0400
committerIlya Dryomov <idryomov@gmail.com>2021-06-22 13:53:28 +0200
commit7a971e2c0767b6fc9a77c4108eceff0509c61cdb (patch)
treedf30eb87a1fcd07e2ddae903ce7617cee17766d1
parent27171ae6a0fdc75571e5bf3d0961631a1e4fb765 (diff)
ceph: fix error handling in ceph_atomic_open and ceph_lookup
Commit aa60cfc3f7ee broke the error handling in these functions such that they don't handle non-ENOENT errors from ceph_mdsc_do_request properly. Move the checking of -ENOENT out of ceph_handle_snapdir and into the callers, and if we get a different error, return it immediately. Fixes: aa60cfc3f7ee ("ceph: don't use d_add in ceph_handle_snapdir") Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
-rw-r--r--fs/ceph/dir.c22
-rw-r--r--fs/ceph/file.c14
-rw-r--r--fs/ceph/super.h2
3 files changed, 21 insertions, 17 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 5624fae7a603..9ba79b6531fb 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -668,14 +668,13 @@ out:
* Handle lookups for the hidden .snap directory.
*/
struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
- struct dentry *dentry, int err)
+ struct dentry *dentry)
{
struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */
/* .snap dir? */
- if (err == -ENOENT &&
- ceph_snap(parent) == CEPH_NOSNAP &&
+ if (ceph_snap(parent) == CEPH_NOSNAP &&
strcmp(dentry->d_name.name, fsc->mount_options->snapdir_name) == 0) {
struct dentry *res;
struct inode *inode = ceph_get_snapdir(parent);
@@ -742,7 +741,6 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
struct ceph_fs_client *fsc = ceph_sb_to_client(dir->i_sb);
struct ceph_mds_client *mdsc = ceph_sb_to_mdsc(dir->i_sb);
struct ceph_mds_request *req;
- struct dentry *res;
int op;
int mask;
int err;
@@ -793,12 +791,16 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
req->r_parent = dir;
set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
err = ceph_mdsc_do_request(mdsc, NULL, req);
- res = ceph_handle_snapdir(req, dentry, err);
- if (IS_ERR(res)) {
- err = PTR_ERR(res);
- } else {
- dentry = res;
- err = 0;
+ if (err == -ENOENT) {
+ struct dentry *res;
+
+ res = ceph_handle_snapdir(req, dentry);
+ if (IS_ERR(res)) {
+ err = PTR_ERR(res);
+ } else {
+ dentry = res;
+ err = 0;
+ }
}
dentry = ceph_finish_lookup(req, dentry, err);
ceph_mdsc_put_request(req); /* will dput(dentry) */
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4dc96885acd0..d51af3698032 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -742,14 +742,16 @@ retry:
err = ceph_mdsc_do_request(mdsc,
(flags & (O_CREAT|O_TRUNC)) ? dir : NULL,
req);
- dentry = ceph_handle_snapdir(req, dentry, err);
- if (IS_ERR(dentry)) {
- err = PTR_ERR(dentry);
- goto out_req;
+ if (err == -ENOENT) {
+ dentry = ceph_handle_snapdir(req, dentry);
+ if (IS_ERR(dentry)) {
+ err = PTR_ERR(dentry);
+ goto out_req;
+ }
+ err = 0;
}
- err = 0;
- if ((flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
+ if (!err && (flags & O_CREAT) && !req->r_reply_info.head->is_dentry)
err = ceph_handle_notrace_create(dir, dentry);
if (d_in_lookup(dentry)) {
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index db80d89556b1..839e6b0239ee 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -1218,7 +1218,7 @@ extern const struct dentry_operations ceph_dentry_ops;
extern loff_t ceph_make_fpos(unsigned high, unsigned off, bool hash_order);
extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry);
extern struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
- struct dentry *dentry, int err);
+ struct dentry *dentry);
extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
struct dentry *dentry, int err);