this function does the same thing as add build_path_from_dentry() but
takes a boolean parameter to decide whether or not to prefix the path
with the tree name.
we cannot rely on tcon->Flags & SMB_SHARE_IS_IN_DFS for SMB2 as smb2
code never sets tcon->Flags but it sets tcon->share_flags and it seems
the SMB_SHARE_IS_IN_DFS has different semantics in SMB2: the prefix
shouldn't be added everytime it was in SMB1.
Signed-off-by: Aurelien Aptel <aaptel@xxxxxxxx>
---
fs/cifs/cifs_dfs_ref.c | 4 +++-
fs/cifs/cifsproto.h | 2 ++
fs/cifs/dir.c | 13 ++++++++++++-
3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index ec9dbbc..8a9ebfd 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -302,7 +302,9 @@ static struct vfsmount *cifs_dfs_do_automount(struct dentry *mntpt)
* gives us the latter, so we must adjust the result.
*/
mnt = ERR_PTR(-ENOMEM);
- full_path = build_path_from_dentry(mntpt);
+
+ /* always use tree name prefix */
+ full_path = build_path_from_dentry_optional_prefix(mntpt, true);
if (full_path == NULL)
goto cdda_exit;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index c097830..9ee46c1 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -61,6 +61,8 @@ extern void exit_cifs_idmap(void);
extern int init_cifs_spnego(void);
extern void exit_cifs_spnego(void);
extern char *build_path_from_dentry(struct dentry *);
+extern char *build_path_from_dentry_optional_prefix(struct dentry *direntry,
+ bool prefix);
extern char *cifs_build_path_to_root(struct smb_vol *vol,
struct cifs_sb_info *cifs_sb,
struct cifs_tcon *tcon,
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 2c227a9..56366e9 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -81,6 +81,17 @@ cifs_build_path_to_root(struct smb_vol *vol, struct cifs_sb_info *cifs_sb,
char *
build_path_from_dentry(struct dentry *direntry)
{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
+ struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+ bool prefix = tcon->Flags & SMB_SHARE_IS_IN_DFS;
+
+ return build_path_from_dentry_optional_prefix(direntry,
+ prefix);
+}
+
+char *
+build_path_from_dentry_optional_prefix(struct dentry *direntry, bool prefix)
+{
struct dentry *temp;
int namelen;
int dfsplen;
@@ -92,7 +103,7 @@ build_path_from_dentry(struct dentry *direntry)
unsigned seq;
dirsep = CIFS_DIR_SEP(cifs_sb);
- if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
+ if (prefix)
dfsplen = strnlen(tcon->treeName, MAX_TREE_SIZE + 1);
else
dfsplen = 0;
--
2.10.2
--
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