#include "cifs_fs_sb.h"
-static void cifs_set_ops(struct inode *inode)
+static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
{
struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
inode->i_data.a_ops = &cifs_addr_ops;
break;
case S_IFDIR:
- inode->i_op = &cifs_dir_inode_ops;
- inode->i_fop = &cifs_dir_ops;
+#ifdef CONFIG_CIFS_DFS_UPCALL
+ if (is_dfs_referral) {
+ inode->i_op = &cifs_dfs_referral_inode_operations;
+ } else {
+#else /* NO DFS support, treat as a directory */
+ {
+#endif
+ inode->i_op = &cifs_dir_inode_ops;
+ inode->i_fop = &cifs_dir_ops;
+ }
break;
case S_IFLNK:
inode->i_op = &cifs_symlink_inode_ops;
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)
{
struct cifsTconInfo *pTcon;
struct inode *inode;
struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
- char *tmp_path;
+ 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);
+
+try_again_CIFSSMBUnixQPathInfo:
/* could have done a find first instead but this returns more info */
- rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
+ rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &findData,
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) {
- tmp_path =
- kmalloc(strnlen(pTcon->treeName,
- MAX_TREE_SIZE + 1) +
- strnlen(search_path, MAX_PATHCONF) + 1,
- GFP_KERNEL);
- if (tmp_path == NULL)
- return -ENOMEM;
-
- /* have to skip first of the double backslash of
- UNC name */
- strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
- strncat(tmp_path, search_path, MAX_PATHCONF);
- rc = connect_to_dfs_path(xid, pTcon->ses,
- /* treename + */ tmp_path,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- kfree(tmp_path);
-
- /* BB fix up inode etc. */
- } else if (rc) {
- return 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;
} else {
struct cifsInodeInfo *cifsInfo;
__u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
/* get new inode */
if (*pinode == NULL) {
*pinode = new_inode(sb);
- if (*pinode == NULL)
- return -ENOMEM;
+ 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? */
(unsigned long) inode->i_size,
(unsigned long long)inode->i_blocks));
- cifs_set_ops(inode);
+ cifs_set_ops(inode, is_dfs_referral);
}
+cgiiu_exit:
+ if (full_path != search_path)
+ kfree(full_path);
return rc;
}
int cifs_get_inode_info(struct inode **pinode,
const unsigned char *search_path, FILE_ALL_INFO *pfindData,
- struct super_block *sb, int xid)
+ 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);
- char *tmp_path;
+ const unsigned char *full_path = NULL;
char *buf = NULL;
int adjustTZ = FALSE;
+ bool is_dfs_referral = false;
pTcon = cifs_sb->tcon;
cFYI(1, ("Getting info on %s", search_path));
if (buf == NULL)
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, search_path, pfindData,
+ rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
0 /* not legacy */,
cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
when server claims no NT SMB support and the above call
failed at least once - set flag in tcon or mount */
if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
- rc = SMBQueryInformation(xid, pTcon, search_path,
+ rc = SMBQueryInformation(xid, pTcon, full_path,
pfindData, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
}
/* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
if (rc) {
- if (rc == -EREMOTE) {
- tmp_path =
- kmalloc(strnlen
- (pTcon->treeName,
- MAX_TREE_SIZE + 1) +
- strnlen(search_path, MAX_PATHCONF) + 1,
- GFP_KERNEL);
- if (tmp_path == NULL) {
- kfree(buf);
- return -ENOMEM;
+ if (rc == -EREMOTE && !is_dfs_referral) {
+ is_dfs_referral = true;
+ if (full_path != search_path) {
+ kfree(full_path);
+ full_path = search_path;
}
-
- strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
- strncat(tmp_path, search_path, MAX_PATHCONF);
- rc = connect_to_dfs_path(xid, pTcon->ses,
- /* treename + */ tmp_path,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- kfree(tmp_path);
- /* BB fix up inode etc. */
- } else if (rc) {
- kfree(buf);
- return rc;
+ goto try_again_CIFSSMBQPathInfo;
}
+ goto cgii_exit;
} else {
struct cifsInodeInfo *cifsInfo;
__u32 attr = le32_to_cpu(pfindData->Attributes);
if (*pinode == NULL) {
*pinode = new_inode(sb);
if (*pinode == NULL) {
- kfree(buf);
- return -ENOMEM;
+ rc = -ENOMEM;
+ goto cgii_exit;
}
/* Is an i_ino of zero legal? Can we use that to check
if the server supports returning inode numbers? Are
/* 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);
+ acl_to_uid_mode(inode, search_path, pfid);
}
#endif
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
atomic_set(&cifsInfo->inUse, 1);
}
- cifs_set_ops(inode);
+ cifs_set_ops(inode, is_dfs_referral);
}
+cgii_exit:
+ if (full_path != search_path)
+ kfree(full_path);
kfree(buf);
return rc;
}
if (cifs_sb->tcon->unix_ext)
rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
else
- rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
+ rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
+ NULL);
if (rc && cifs_sb->tcon->ipc) {
cFYI(1, ("ipc connection - fake read inode"));
inode->i_mode |= S_IFDIR;
local_size = tmp_inode->i_size;
cifs_unix_info_to_inode(tmp_inode, pData, 1);
- cifs_set_ops(tmp_inode);
+ cifs_set_ops(tmp_inode, false);
if (!S_ISREG(tmp_inode->i_mode))
return;
inode->i_sb, xid);
else
rc = cifs_get_inode_info(&newinode, full_path, NULL,
- inode->i_sb, xid);
+ inode->i_sb, xid, NULL);
if (pTcon->nocase)
direntry->d_op = &cifs_ci_dentry_ops;
}
} else {
rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
- direntry->d_sb, xid);
+ direntry->d_sb, xid, NULL);
if (rc) {
cFYI(1, ("error on getting revalidate info %d", rc));
/* if (rc != -ENOENT)
}
cifsInode = CIFS_I(direntry->d_inode);
- /* BB check if we need to refresh inode from server now ? BB */
-
- if (attrs->ia_valid & ATTR_SIZE) {
+ if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
/*
- Flush data before changing file size on server. If the
+ Flush data before changing file size or changing the last
+ write time of the file on the server. If the
flush returns error, store it to report later and continue.
BB: This should be smarter. Why bother flushing pages that
will be truncated anyway? Also, should we error out here if
CIFS_I(direntry->d_inode)->write_behind_rc = rc;
rc = 0;
}
+ }
+ if (attrs->ia_valid & ATTR_SIZE) {
/* To avoid spurious oplock breaks from server, in the case of
inodes that we already have open, avoid doing path based
setting of file size if we can do it by handle.