[CIFS] Enable DFS support for Unix query path info
Final piece for handling DFS in unix_query_path_info, constructing a
fake inode for the junction directory which the submount will cover.
Acked-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 9d9b56a..422d4e2 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -161,77 +161,108 @@
spin_unlock(&inode->i_lock);
}
+static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
+ struct super_block *sb)
+{
+ struct inode *pinode = NULL;
+
+ memset(pfnd_dat, sizeof(FILE_UNIX_BASIC_INFO), 0);
+
+/* __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
+ __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
+ __u64 UniqueId = 0; */
+ pfnd_dat->LastStatusChange =
+ cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
+ pfnd_dat->LastAccessTime =
+ cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
+ pfnd_dat->LastModificationTime =
+ cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
+ pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
+ pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
+ pfnd_dat->Nlinks = cpu_to_le64(2);
+ if (sb->s_root)
+ pinode = sb->s_root->d_inode;
+ if (pinode == NULL)
+ return;
+
+ /* fill in default values for the remaining based on root
+ inode since we can not query the server for this inode info */
+ pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
+ pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
+ pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
+ pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
+}
+
int cifs_get_inode_info_unix(struct inode **pinode,
const unsigned char *full_path, struct super_block *sb, int xid)
{
int rc = 0;
- FILE_UNIX_BASIC_INFO findData;
+ FILE_UNIX_BASIC_INFO find_data;
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
bool is_dfs_referral = false;
+ struct cifsInodeInfo *cifsInfo;
+ __u64 num_of_bytes;
+ __u64 end_of_file;
pTcon = cifs_sb->tcon;
cFYI(1, ("Getting info on %s", full_path));
-try_again_CIFSSMBUnixQPathInfo:
/* could have done a find first instead but this returns more info */
- rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
+ rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
-/* dump_mem("\nUnixQPathInfo return data", &findData,
- sizeof(findData)); */
if (rc) {
if (rc == -EREMOTE && !is_dfs_referral) {
is_dfs_referral = true;
- goto try_again_CIFSSMBUnixQPathInfo;
+ cERROR(1, ("DFS ref")); /* BB removeme BB */
+ /* for DFS, server does not give us real inode data */
+ fill_fake_finddataunix(&find_data, sb);
+ rc = 0;
}
- goto cgiiu_exit;
- } else {
- struct cifsInodeInfo *cifsInfo;
- __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
- __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
-
- /* get new inode */
- if (*pinode == NULL) {
- *pinode = new_inode(sb);
- if (*pinode == NULL) {
- rc = -ENOMEM;
- goto cgiiu_exit;
- }
- /* Is an i_ino of zero legal? */
- /* Are there sanity checks we can use to ensure that
- the server is really filling in that field? */
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
- (*pinode)->i_ino =
- (unsigned long)findData.UniqueId;
- } /* note ino incremented to unique num in new_inode */
- if (sb->s_flags & MS_NOATIME)
- (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
-
- insert_inode_hash(*pinode);
- }
-
- inode = *pinode;
- cifsInfo = CIFS_I(inode);
-
- cFYI(1, ("Old time %ld", cifsInfo->time));
- cifsInfo->time = jiffies;
- cFYI(1, ("New time %ld", cifsInfo->time));
- /* this is ok to set on every inode revalidate */
- atomic_set(&cifsInfo->inUse, 1);
-
- cifs_unix_info_to_inode(inode, &findData, 0);
-
-
- if (num_of_bytes < end_of_file)
- cFYI(1, ("allocation size less than end of file"));
- cFYI(1, ("Size %ld and blocks %llu",
- (unsigned long) inode->i_size,
- (unsigned long long)inode->i_blocks));
-
- cifs_set_ops(inode, is_dfs_referral);
}
+ num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
+ end_of_file = le64_to_cpu(find_data.EndOfFile);
+
+ /* get new inode */
+ if (*pinode == NULL) {
+ *pinode = new_inode(sb);
+ if (*pinode == NULL) {
+ rc = -ENOMEM;
+ goto cgiiu_exit;
+ }
+ /* Is an i_ino of zero legal? */
+ /* note ino incremented to unique num in new_inode */
+ /* Are there sanity checks we can use to ensure that
+ the server is really filling in that field? */
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
+ (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
+
+ if (sb->s_flags & MS_NOATIME)
+ (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
+
+ insert_inode_hash(*pinode);
+ }
+
+ inode = *pinode;
+ cifsInfo = CIFS_I(inode);
+
+ cFYI(1, ("Old time %ld", cifsInfo->time));
+ cifsInfo->time = jiffies;
+ cFYI(1, ("New time %ld", cifsInfo->time));
+ /* this is ok to set on every inode revalidate */
+ atomic_set(&cifsInfo->inUse, 1);
+
+ cifs_unix_info_to_inode(inode, &find_data, 0);
+
+ if (num_of_bytes < end_of_file)
+ cFYI(1, ("allocation size less than end of file"));
+ cFYI(1, ("Size %ld and blocks %llu",
+ (unsigned long) inode->i_size,
+ (unsigned long long)inode->i_blocks));
+
+ cifs_set_ops(inode, is_dfs_referral);
cgiiu_exit:
return rc;
}
