smb3: add debug messages for closing unmatched open
Helps distinguish between an interrupted close and a truly
unmatched open.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 5668fb7..289915f 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -729,19 +729,35 @@ smb2_cancelled_close_fid(struct work_struct *work)
{
struct close_cancelled_open *cancelled = container_of(work,
struct close_cancelled_open, work);
+ struct cifs_tcon *tcon = cancelled->tcon;
+ int rc;
- cifs_dbg(VFS, "Close unmatched open\n");
+ if (cancelled->mid)
+ cifs_tcon_dbg(VFS, "Close unmatched open for MID:%llx\n",
+ cancelled->mid);
+ else
+ cifs_tcon_dbg(VFS, "Close interrupted close\n");
- SMB2_close(0, cancelled->tcon, cancelled->fid.persistent_fid,
- cancelled->fid.volatile_fid);
- cifs_put_tcon(cancelled->tcon);
+ rc = SMB2_close(0, tcon, cancelled->fid.persistent_fid,
+ cancelled->fid.volatile_fid);
+ if (rc)
+ cifs_tcon_dbg(VFS, "Close cancelled mid failed rc:%d\n", rc);
+
+ cifs_put_tcon(tcon);
kfree(cancelled);
}
-/* Caller should already has an extra reference to @tcon */
+/*
+ * Caller should already has an extra reference to @tcon
+ * This function is used to queue work to close a handle to prevent leaks
+ * on the server.
+ * We handle two cases. If an open was interrupted after we sent the
+ * SMB2_CREATE to the server but before we processed the reply, and second
+ * if a close was interrupted before we sent the SMB2_CLOSE to the server.
+ */
static int
-__smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
- __u64 volatile_fid)
+__smb2_handle_cancelled_cmd(struct cifs_tcon *tcon, __u16 cmd, __u64 mid,
+ __u64 persistent_fid, __u64 volatile_fid)
{
struct close_cancelled_open *cancelled;
@@ -752,6 +768,8 @@ __smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
cancelled->fid.persistent_fid = persistent_fid;
cancelled->fid.volatile_fid = volatile_fid;
cancelled->tcon = tcon;
+ cancelled->cmd = cmd;
+ cancelled->mid = mid;
INIT_WORK(&cancelled->work, smb2_cancelled_close_fid);
WARN_ON(queue_work(cifsiod_wq, &cancelled->work) == false);
@@ -769,7 +787,8 @@ smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid,
tcon->tc_count++;
spin_unlock(&cifs_tcp_ses_lock);
- rc = __smb2_handle_cancelled_close(tcon, persistent_fid, volatile_fid);
+ rc = __smb2_handle_cancelled_cmd(tcon, SMB2_CLOSE_HE, 0,
+ persistent_fid, volatile_fid);
if (rc)
cifs_put_tcon(tcon);
@@ -793,8 +812,11 @@ smb2_handle_cancelled_mid(char *buffer, struct TCP_Server_Info *server)
if (!tcon)
return -ENOENT;
- rc = __smb2_handle_cancelled_close(tcon, rsp->PersistentFileId,
- rsp->VolatileFileId);
+ rc = __smb2_handle_cancelled_cmd(tcon,
+ le16_to_cpu(sync_hdr->Command),
+ le64_to_cpu(sync_hdr->MessageId),
+ rsp->PersistentFileId,
+ rsp->VolatileFileId);
if (rc)
cifs_put_tcon(tcon);