CIFS: Fix SMB2 readdir error handling

commit 52755808d4525f4d5b86d112d36ffc7a46f3fb48 upstream.

SMB2 servers indicates the end of a directory search with
STATUS_NO_MORE_FILE error code that is not processed now.
This causes generic/257 xfstest to fail. Fix this by triggering
the end of search by this error code in SMB2_query_directory.

Also when negotiating CIFS protocol we tell the server to close
the search automatically at the end and there is no need to do
it itself. In the case of SMB2 protocol, we need to close it
explicitly - separate close directory checks for different
protocols.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index f15d435..5d12d69 100644 (file)
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -399,6 +399,8 @@ struct smb_version_operations {
                        const struct cifs_fid *, u32 *);
        int (*set_acl)(struct cifs_ntsd *, __u32, struct inode *, const char *,
                        int);
+       /* check if we need to issue closedir */
+       bool (*dir_needs_close)(struct cifsFileInfo *);
 };
 
 struct smb_version_values {

diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 8175b18..d375322 100644 (file)
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -762,7 +762,7 @@ int cifs_closedir(struct inode *inode, struct file *file)
 
        cifs_dbg(FYI, "Freeing private data in close dir\n");
        spin_lock(&cifs_file_list_lock);
-       if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) {
+       if (server->ops->dir_needs_close(cfile)) {
                cfile->invalidHandle = true;
                spin_unlock(&cifs_file_list_lock);
                if (server->ops->close_dir)

diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 2bbf11b..b334a89 100644 (file)
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -593,7 +593,7 @@ find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
                /* close and restart search */
                cifs_dbg(FYI, "search backing up - close and restart search\n");
                spin_lock(&cifs_file_list_lock);
-               if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) {
+               if (server->ops->dir_needs_close(cfile)) {
                        cfile->invalidHandle = true;
                        spin_unlock(&cifs_file_list_lock);
                        if (server->ops->close_dir)

diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index a7f1269..e9ad8d3 100644 (file)
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -1009,6 +1009,12 @@ cifs_is_read_op(__u32 oplock)
        return oplock == OPLOCK_READ;
 }
 
+static bool
+cifs_dir_needs_close(struct cifsFileInfo *cfile)
+{
+       return !cfile->srch_inf.endOfSearch && !cfile->invalidHandle;
+}
+
 struct smb_version_operations smb1_operations = {
        .send_cancel = send_nt_cancel,
        .compare_fids = cifs_compare_fids,
@@ -1078,6 +1084,7 @@ struct smb_version_operations smb1_operations = {
        .query_mf_symlink = cifs_query_mf_symlink,
        .create_mf_symlink = cifs_create_mf_symlink,
        .is_read_op = cifs_is_read_op,
+       .dir_needs_close = cifs_dir_needs_close,
 #ifdef CONFIG_CIFS_XATTR
        .query_all_EAs = CIFSSMBQAllEAs,
        .set_EA = CIFSSMBSetEA,

diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c
index 1007867..a491814 100644 (file)
--- a/fs/cifs/smb2maperror.c
+++ b/fs/cifs/smb2maperror.c
@@ -214,7 +214,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
        {STATUS_BREAKPOINT, -EIO, "STATUS_BREAKPOINT"},
        {STATUS_SINGLE_STEP, -EIO, "STATUS_SINGLE_STEP"},
        {STATUS_BUFFER_OVERFLOW, -EIO, "STATUS_BUFFER_OVERFLOW"},
-       {STATUS_NO_MORE_FILES, -EIO, "STATUS_NO_MORE_FILES"},
+       {STATUS_NO_MORE_FILES, -ENODATA, "STATUS_NO_MORE_FILES"},
        {STATUS_WAKE_SYSTEM_DEBUGGER, -EIO, "STATUS_WAKE_SYSTEM_DEBUGGER"},
        {STATUS_HANDLES_CLOSED, -EIO, "STATUS_HANDLES_CLOSED"},
        {STATUS_NO_INHERITANCE, -EIO, "STATUS_NO_INHERITANCE"},

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index f8977b2..34a17d4 100644 (file)
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1102,6 +1102,12 @@ smb3_parse_lease_buf(void *buf, unsigned int *epoch)
        return le32_to_cpu(lc->lcontext.LeaseState);
 }
 
+static bool
+smb2_dir_needs_close(struct cifsFileInfo *cfile)
+{
+       return !cfile->invalidHandle;
+}
+
 struct smb_version_operations smb20_operations = {
        .compare_fids = smb2_compare_fids,
        .setup_request = smb2_setup_request,
@@ -1175,6 +1181,7 @@ struct smb_version_operations smb20_operations = {
        .create_lease_buf = smb2_create_lease_buf,
        .parse_lease_buf = smb2_parse_lease_buf,
        .clone_range = smb2_clone_range,
+       .dir_needs_close = smb2_dir_needs_close,
 };
 
 struct smb_version_operations smb21_operations = {
@@ -1250,6 +1257,7 @@ struct smb_version_operations smb21_operations = {
        .create_lease_buf = smb2_create_lease_buf,
        .parse_lease_buf = smb2_parse_lease_buf,
        .clone_range = smb2_clone_range,
+       .dir_needs_close = smb2_dir_needs_close,
 };
 
 struct smb_version_operations smb30_operations = {
@@ -1328,6 +1336,7 @@ struct smb_version_operations smb30_operations = {
        .parse_lease_buf = smb3_parse_lease_buf,
        .clone_range = smb2_clone_range,
        .validate_negotiate = smb3_validate_negotiate,
+       .dir_needs_close = smb2_dir_needs_close,
 };
 
 struct smb_version_values smb20_values = {

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 9aab8fe..3487929 100644 (file)
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -2136,6 +2136,10 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
        rsp = (struct smb2_query_directory_rsp *)iov[0].iov_base;
 
        if (rc) {
+               if (rc == -ENODATA && rsp->hdr.Status == STATUS_NO_MORE_FILES) {
+                       srch_inf->endOfSearch = true;
+                       rc = 0;
+               }
                cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
                goto qdir_exit;
        }
@@ -2173,11 +2177,6 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
        else
                cifs_dbg(VFS, "illegal search buffer type\n");
 
-       if (rsp->hdr.Status == STATUS_NO_MORE_FILES)
-               srch_inf->endOfSearch = 1;
-       else
-               srch_inf->endOfSearch = 0;
-
        return rc;
 
 qdir_exit: