CIFS: Add SMB2 support for hardlink operation
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/smb2glob.h b/fs/cifs/smb2glob.h
index 8635574..21555d8 100644
--- a/fs/cifs/smb2glob.h
+++ b/fs/cifs/smb2glob.h
@@ -40,6 +40,7 @@
#define SMB2_OP_MKDIR 5
#define SMB2_OP_RENAME 6
#define SMB2_OP_DELETE 7
+#define SMB2_OP_HARDLINK 8
/* Used when constructing chained read requests. */
#define CHAINED_REQUEST 1
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index a6952baf..1921c9c 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -78,6 +78,10 @@
tmprc = SMB2_rename(xid, tcon, persistent_fid, volatile_fid,
(__le16 *)data);
break;
+ case SMB2_OP_HARDLINK:
+ tmprc = SMB2_set_hardlink(xid, tcon, persistent_fid,
+ volatile_fid, (__le16 *)data);
+ break;
default:
cERROR(1, "Invalid command");
break;
@@ -175,10 +179,10 @@
SMB2_OP_DELETE);
}
-int
-smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
- const char *from_name, const char *to_name,
- struct cifs_sb_info *cifs_sb)
+static int
+smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb, __u32 access, int command)
{
__le16 *smb2_to_name = NULL;
int rc;
@@ -189,9 +193,27 @@
goto smb2_rename_path;
}
- rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, DELETE,
- FILE_OPEN, 0, 0, smb2_to_name, SMB2_OP_RENAME);
+ rc = smb2_open_op_close(xid, tcon, cifs_sb, from_name, access,
+ FILE_OPEN, 0, 0, smb2_to_name, command);
smb2_rename_path:
kfree(smb2_to_name);
return rc;
}
+
+int
+smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb)
+{
+ return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+ DELETE, SMB2_OP_RENAME);
+}
+
+int
+smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb)
+{
+ return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
+ FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK);
+}
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 5aaccb0f..75693e9 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -452,6 +452,7 @@
.rmdir = smb2_rmdir,
.unlink = smb2_unlink,
.rename = smb2_rename_path,
+ .create_hardlink = smb2_create_hardlink,
.open = smb2_open_file,
.set_fid = smb2_set_fid,
.close = smb2_close_file,
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 1dc11ce..a684c4a 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1709,3 +1709,34 @@
kfree(data);
return rc;
}
+
+int
+SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid, __le16 *target_file)
+{
+ struct smb2_file_link_info info;
+ void **data;
+ unsigned int size[2];
+ int rc;
+ int len = (2 * UniStrnlen((wchar_t *)target_file, PATH_MAX));
+
+ data = kmalloc(sizeof(void *) * 2, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ info.ReplaceIfExists = 0; /* 1 = replace existing link with new */
+ /* 0 = fail if link already exists */
+ info.RootDirectory = 0; /* MBZ for network ops (why does spec say?) */
+ info.FileNameLength = cpu_to_le32(len);
+
+ data[0] = &info;
+ size[0] = sizeof(struct smb2_file_link_info);
+
+ data[1] = target_file;
+ size[1] = len + 2 /* null */;
+
+ rc = send_set_info(xid, tcon, persistent_fid, volatile_fid,
+ FILE_LINK_INFORMATION, 2, data, size);
+ kfree(data);
+ return rc;
+}
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index b03ca37..0f3c482 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -653,6 +653,15 @@
char FileName[0]; /* New name to be assigned */
} __packed; /* level 10 Set */
+struct smb2_file_link_info { /* encoding of request for level 11 */
+ __u8 ReplaceIfExists; /* 1 = replace existing link with new */
+ /* 0 = fail if link already exists */
+ __u8 Reserved[7];
+ __u64 RootDirectory; /* MBZ for network operations (why says spec?) */
+ __le32 FileNameLength;
+ char FileName[0]; /* Name to be assigned to new link */
+} __packed; /* level 11 Set */
+
/*
* This level 18, although with struct with same name is different from cifs
* level 0x107. Level 0x107 has an extra u64 between AccessFlags and
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index b43036e..99f6945 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -68,6 +68,9 @@
extern int smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
const char *from_name, const char *to_name,
struct cifs_sb_info *cifs_sb);
+extern int smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+ const char *from_name, const char *to_name,
+ struct cifs_sb_info *cifs_sb);
extern int smb2_open_file(const unsigned int xid, struct cifs_tcon *tcon,
const char *full_path, int disposition,
@@ -112,5 +115,8 @@
extern int SMB2_rename(const unsigned int xid, struct cifs_tcon *tcon,
u64 persistent_fid, u64 volatile_fid,
__le16 *target_file);
+extern int SMB2_set_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
+ u64 persistent_fid, u64 volatile_fid,
+ __le16 *target_file);
#endif /* _SMB2PROTO_H */