cifs: Use smb 2 - 3 and cifsacl mount options setacl function

Added set acl function. Very similar to set cifs acl function for smb1.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>

1 files changed, 60 insertions, 3 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index ccbb397debbc..ed98daa0891c 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1370,6 +1370,63 @@ get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb,
         return pntsd;
 }
 
+#ifdef CONFIG_CIFS_ACL
+static int
+set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
+                struct inode *inode, const char *path, int aclflag)
+{
+        u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
+        unsigned int xid;
+        int rc, access_flags = 0;
+        struct cifs_tcon *tcon;
+        struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+        struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
+        struct cifs_fid fid;
+        struct cifs_open_parms oparms;
+        __le16 *utf16_path;
+
+        cifs_dbg(FYI, "set smb3 acl for path %s\n", path);
+        if (IS_ERR(tlink))
+                return PTR_ERR(tlink);
+
+        tcon = tlink_tcon(tlink);
+        xid = get_xid();
+
+        if (backup_cred(cifs_sb))
+                oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
+        else
+                oparms.create_options = 0;
+
+        if (aclflag == CIFS_ACL_OWNER || aclflag == CIFS_ACL_GROUP)
+                access_flags = WRITE_OWNER;
+        else
+                access_flags = WRITE_DAC;
+
+        utf16_path = cifs_convert_path_to_utf16(path, cifs_sb);
+        if (!utf16_path)
+                return -ENOMEM;
+
+        oparms.tcon = tcon;
+        oparms.desired_access = access_flags;
+        oparms.disposition = FILE_OPEN;
+        oparms.path = path;
+        oparms.fid = &fid;
+        oparms.reconnect = false;
+
+        rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL);
+        kfree(utf16_path);
+        if (!rc) {
+                rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid,
+                            fid.volatile_fid, pnntsd, acllen, aclflag);
+                SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
+        }
+
+        cifs_put_tlink(tlink);
+        free_xid(xid);
+        return rc;
+}
+#endif /* CIFS_ACL */
+
 /* Retrieve an ACL from the server */
 static struct cifs_ntsd *
 get_smb2_acl(struct cifs_sb_info *cifs_sb,
@@ -2498,7 +2555,7 @@ struct smb_version_operations smb20_operations = {
 #ifdef CONFIG_CIFS_ACL
         .get_acl = get_smb2_acl,
         .get_acl_by_fid = get_smb2_acl_by_fid,
-/*      .set_acl = set_smb3_acl, */
+        .set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 
@@ -2587,7 +2644,7 @@ struct smb_version_operations smb21_operations = {
 #ifdef CONFIG_CIFS_ACL
         .get_acl = get_smb2_acl,
         .get_acl_by_fid = get_smb2_acl_by_fid,
-/*      .set_acl = set_smb3_acl, */
+        .set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };
 
@@ -2686,7 +2743,7 @@ struct smb_version_operations smb30_operations = {
 #ifdef CONFIG_CIFS_ACL
         .get_acl = get_smb2_acl,
         .get_acl_by_fid = get_smb2_acl_by_fid,
-/*      .set_acl = set_smb3_acl, */
+        .set_acl = set_smb2_acl,
 #endif /* CIFS_ACL */
 };