lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[CIFS] Fix paths when share is in DFS to include proper prefix

Browse Source 
Some versions of Samba (3.2-pre e.g.) are stricter about checking to make sure that
paths in DFS name spaces are sent in the form \\server\share\dir\subdir ...
instead of \dir\subdir

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
2008-05-15 01:50:56 +00:00
parent 35fc37d517
commit 646dd53987
5 changed files with 37 additions and 127 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
fs/cifs/inode.c
View File

@@ -161,52 +161,18 @@ static void cifs_unix_info_to_inode(struct inode *inode,
spin_unlock(&inode->i_lock);
}
static const unsigned char *cifs_get_search_path(struct cifs_sb_info *cifs_sb,
const char *search_path)
{
int tree_len;
int path_len;
int i;
char *tmp_path;
struct cifsTconInfo *pTcon = cifs_sb->tcon;
if (!(pTcon->Flags & SMB_SHARE_IS_IN_DFS))
return search_path;
/* use full path name for working with DFS */
tree_len = strnlen(pTcon->treeName, MAX_TREE_SIZE + 1);
path_len = strnlen(search_path, MAX_PATHCONF);
tmp_path = kmalloc(tree_len+path_len+1, GFP_KERNEL);
if (tmp_path == NULL)
return search_path;
strncpy(tmp_path, pTcon->treeName, tree_len);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
for (i = 0; i < tree_len; i++) {
if (tmp_path[i] == '\\')
tmp_path[i] = '/';
}
strncpy(tmp_path+tree_len, search_path, path_len);
tmp_path[tree_len+path_len] = 0;
return tmp_path;
}
int cifs_get_inode_info_unix(struct inode **pinode,
const unsigned char *search_path, struct super_block *sb, int xid)
const unsigned char *full_path, struct super_block *sb, int xid)
{
int rc = 0;
FILE_UNIX_BASIC_INFO findData;
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
const unsigned char *full_path;
bool is_dfs_referral = false;
pTcon = cifs_sb->tcon;
cFYI(1, ("Getting info on %s", search_path));
full_path = cifs_get_search_path(cifs_sb, search_path);
cFYI(1, ("Getting info on %s", full_path));
try_again_CIFSSMBUnixQPathInfo:
/* could have done a find first instead but this returns more info */
@@ -218,10 +184,6 @@ try_again_CIFSSMBUnixQPathInfo:
if (rc) {
if (rc == -EREMOTE && !is_dfs_referral) {
is_dfs_referral = true;
if (full_path != search_path) {
kfree(full_path);
full_path = search_path;
}
goto try_again_CIFSSMBUnixQPathInfo;
}
goto cgiiu_exit;
@@ -271,8 +233,6 @@ try_again_CIFSSMBUnixQPathInfo:
cifs_set_ops(inode, is_dfs_referral);
}
cgiiu_exit:
if (full_path != search_path)
kfree(full_path);
return rc;
}
@@ -380,20 +340,19 @@ static int get_sfu_mode(struct inode *inode,
}
int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
const unsigned char *full_path, FILE_ALL_INFO *pfindData,
struct super_block *sb, int xid, const __u16 *pfid)
{
int rc = 0;
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
const unsigned char *full_path = NULL;
char *buf = NULL;
bool adjustTZ = false;
bool is_dfs_referral = false;
pTcon = cifs_sb->tcon;
cFYI(1, ("Getting info on %s", search_path));
cFYI(1, ("Getting info on %s", full_path));
if ((pfindData == NULL) && (*pinode != NULL)) {
if (CIFS_I(*pinode)->clientCanCacheRead) {
@@ -409,8 +368,6 @@ int cifs_get_inode_info(struct inode **pinode,
return -ENOMEM;
pfindData = (FILE_ALL_INFO *)buf;
full_path = cifs_get_search_path(cifs_sb, search_path);
try_again_CIFSSMBQPathInfo:
/* could do find first instead but this returns more info */
rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
@@ -432,10 +389,6 @@ try_again_CIFSSMBQPathInfo:
if (rc) {
if (rc == -EREMOTE && !is_dfs_referral) {
is_dfs_referral = true;
if (full_path != search_path) {
kfree(full_path);
full_path = search_path;
}
goto try_again_CIFSSMBQPathInfo;
}
goto cgii_exit;
@@ -470,7 +423,7 @@ try_again_CIFSSMBQPathInfo:
__u64 inode_num;
rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
search_path, &inode_num,
full_path, &inode_num,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
@@ -539,7 +492,7 @@ try_again_CIFSSMBQPathInfo:
(cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
if (decode_sfu_inode(inode,
le64_to_cpu(pfindData->EndOfFile),
search_path,
full_path,
cifs_sb, xid))
cFYI(1, ("Unrecognized sfu inode type"));
@@ -582,12 +535,12 @@ try_again_CIFSSMBQPathInfo:
/* fill in 0777 bits from ACL */
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
cFYI(1, ("Getting mode bits from ACL"));
acl_to_uid_mode(inode, search_path, pfid);
acl_to_uid_mode(inode, full_path, pfid);
}
#endif
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
/* fill in remaining high mode bits e.g. SUID, VTX */
get_sfu_mode(inode, search_path, cifs_sb, xid);
get_sfu_mode(inode, full_path, cifs_sb, xid);
} else if (atomic_read(&cifsInfo->inUse) == 0) {
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;
@@ -599,8 +552,6 @@ try_again_CIFSSMBQPathInfo:
cifs_set_ops(inode, is_dfs_referral);
}
cgii_exit:
if (full_path != search_path)
kfree(full_path);
kfree(buf);
return rc;
}