From: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
Add support of Alternate Data Streams (ads).
The generic access flags that cifs client currently employs are sufficient
for alternate data streams as well (MS-CIFS 2.2.4.64.1).
The ads files have a : in the name, so that is used to differentiate
between a regular file and its alternate data streams as they
have the same file id.
This scheme applies to non-posix compliant servers such as Windows only.
One operation that does not work is Rename (0x7).
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@xxxxxxxxx>
---
fs/cifs/inode.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index cb79c7e..a28950a 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -709,10 +709,15 @@ cifs_get_inode_info(struct inode **inode, const char *full_path,
cFYI(1, "CIFSCheckMFSymlink: %d", tmprc);
}
+ if (strstr(full_path, ":"))
+ fattr.cf_flags |= S_PRIVATE;
+
if (!*inode) {
*inode = cifs_iget(sb, &fattr);
if (!*inode)
rc = -ENOMEM;
+ else
+ (*inode)->i_flags |= fattr.cf_flags;
} else {
cifs_fattr_to_inode(*inode, &fattr);
}
@@ -744,6 +749,10 @@ cifs_find_inode(struct inode *inode, void *opaque)
if ((inode->i_mode & S_IFMT) != (fattr->cf_mode & S_IFMT))
return 0;
+ /* don't match inode with different flags */
+ if ((inode->i_flags & S_PRIVATE) != (fattr->cf_flags & S_PRIVATE))
+ return 0;
+
/* if it's not a directory or has no dentries, then flag it */
if (S_ISDIR(inode->i_mode) && !hlist_empty(&inode->i_dentry))
fattr->cf_flags |= CIFS_FATTR_INO_COLLISION;
--
1.6.0.2
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