Signed-off-by: Stefan Metzmacher <metze@xxxxxxxxx>
---
fs/cifs/link.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++----
1 files changed, 50 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 6cd0879..6d00712 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -103,10 +103,54 @@ CIFSCreateMFSymLink(const int xid, struct cifsTconInfo *tcon,
static int
CIFSQueryMFSymLink(const int xid, struct cifsTconInfo *tcon,
const unsigned char *searchName, char **symlinkinfo,
- const struct nls_table *nls_codepage)
+ const struct nls_table *nls_codepage, int remap)
{
- int rc = -EOPNOTSUPP;
- return rc;
+ int rc;
+ int oplock = 0;
+ __u16 netfid = 0;
+ u8 *buf;
+ char *pbuf;
+ unsigned int bytes_read = 0;
+ int buf_type = CIFS_NO_BUFFER;
+ unsigned int link_len = 0;
+ FILE_ALL_INFO file_info;
+
+ buf = kmalloc(CIFS_MF_SYMLINK_FILE_SIZE, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ pbuf = buf;
+
+ rc = CIFSSMBOpen(xid, tcon, searchName, FILE_OPEN, GENERIC_READ,
+ CREATE_NOT_DIR, &netfid, &oplock, &file_info,
+ nls_codepage, remap);
+ if (rc != 0) {
+ kfree(buf);
+ return rc;
+ }
+
+ if (file_info.EndOfFile != CIFS_MF_SYMLINK_FILE_SIZE) {
+ CIFSSMBClose(xid, tcon, netfid);
+ kfree(buf);
+ /* it's not a symlink */
+ return -EINVAL;
+ }
+
+ rc = CIFSSMBRead(xid, tcon, netfid,
+ CIFS_MF_SYMLINK_FILE_SIZE /* length */,
+ 0 /* offset */,
+ &bytes_read, &pbuf, &buf_type);
+ CIFSSMBClose(xid, tcon, netfid);
+ if (rc != 0) {
+ kfree(buf);
+ return rc;
+ }
+
+ rc = CIFSParseMFSymlink(buf, bytes_read, &link_len, symlinkinfo);
+ kfree(buf);
+ if (rc != 0)
+ return rc;
+
+ return 0;
}
int
@@ -297,7 +341,9 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd)
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS)
rc = CIFSQueryMFSymLink(xid, tcon, full_path, &target_path,
- cifs_sb->local_nls);
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
else
rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, &target_path,
cifs_sb->local_nls);
--
1.7.0.4
--
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