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authorRonnie Sahlberg <lsahlber@redhat.com>2021-01-29 06:35:10 +0300
committerSteve French <stfrench@microsoft.com>2021-01-29 06:40:43 +0300
commit0d4873f9aa4ff8fc1d63a5755395b794d32ce046 (patch)
tree12b7cb6db5f333643891a8bace6158803ca2b460 /fs/cifs/cifs_dfs_ref.c
parentbd2f0b43c1c864fa653342c5c074bfcd29f10934 (diff)
downloadlinux-0d4873f9aa4ff8fc1d63a5755395b794d32ce046.tar.xz
cifs: fix dfs domain referrals
The new mount API requires additional changes to how DFS is handled. Additional testing of DFS uncovered problems with domain based DFS referrals (a follow on patch addresses DFS links) which this patch addresses. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifs_dfs_ref.c')
-rw-r--r--fs/cifs/cifs_dfs_ref.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index e4c6ae47a796..6b1ce4efb591 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -133,8 +133,9 @@ cifs_build_devname(char *nodename, const char *prepath)
* Caller is responsible for freeing returned value if it is not error.
*/
char *cifs_compose_mount_options(const char *sb_mountdata,
- const char *fullpath,
- const struct dfs_info3_param *ref)
+ const char *fullpath,
+ const struct dfs_info3_param *ref,
+ char **devname)
{
int rc;
char *name;
@@ -231,7 +232,10 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
strcat(mountdata, "ip=");
strcat(mountdata, srvIP);
- kfree(name);
+ if (devname)
+ *devname = name;
+ else
+ kfree(name);
/*cifs_dbg(FYI, "%s: parent mountdata: %s\n", __func__, sb_mountdata);*/
/*cifs_dbg(FYI, "%s: submount mountdata: %s\n", __func__, mountdata );*/
@@ -278,7 +282,7 @@ static struct vfsmount *cifs_dfs_do_mount(struct dentry *mntpt,
/* strip first '\' from fullpath */
mountdata = cifs_compose_mount_options(cifs_sb->ctx->mount_options,
- fullpath + 1, NULL);
+ fullpath + 1, NULL, NULL);
if (IS_ERR(mountdata)) {
kfree(devname);
return (struct vfsmount *)mountdata;