vfs: Remove {get,set,remove}xattr inode operations

[cascardo/linux.git] / fs / overlayfs / inode.c

diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 94bca71..b4c3559 100644 (file)
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -238,16 +238,13 @@ out:
        return err;
 }
 
-ssize_t ovl_getxattr(struct dentry *dentry, struct inode *inode,
-                    const char *name, void *value, size_t size)
+int ovl_xattr_get(struct dentry *dentry, const char *name,
+                 void *value, size_t size)
 {
        struct dentry *realdentry = ovl_dentry_real(dentry);
        ssize_t res;
        const struct cred *old_cred;
 
-       if (ovl_is_private_xattr(name))
-               return -ENODATA;
-
        old_cred = ovl_override_creds(dentry->d_sb);
        res = vfs_getxattr(realdentry, name, value, size);
        revert_creds(old_cred);
@@ -258,7 +255,8 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
 {
        struct dentry *realdentry = ovl_dentry_real(dentry);
        ssize_t res;
-       int off;
+       size_t len;
+       char *s;
        const struct cred *old_cred;
 
        old_cred = ovl_override_creds(dentry->d_sb);
@@ -268,17 +266,19 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
                return res;
 
        /* filter out private xattrs */
-       for (off = 0; off < res;) {
-               char *s = list + off;
-               size_t slen = strlen(s) + 1;
+       for (s = list, len = res; len;) {
+               size_t slen = strnlen(s, len) + 1;
 
-               BUG_ON(off + slen > res);
+               /* underlying fs providing us with an broken xattr list? */
+               if (WARN_ON(slen > len))
+                       return -EIO;
 
+               len -= slen;
                if (ovl_is_private_xattr(s)) {
                        res -= slen;
-                       memmove(s, s + slen, res - off);
+                       memmove(s, s + slen, len);
                } else {
-                       off += slen;
+                       s += slen;
                }
        }
 
@@ -367,10 +367,7 @@ static const struct inode_operations ovl_file_inode_operations = {
        .setattr        = ovl_setattr,
        .permission     = ovl_permission,
        .getattr        = ovl_getattr,
-       .setxattr       = generic_setxattr,
-       .getxattr       = ovl_getxattr,
        .listxattr      = ovl_listxattr,
-       .removexattr    = generic_removexattr,
        .get_acl        = ovl_get_acl,
        .update_time    = ovl_update_time,
 };
@@ -380,10 +377,7 @@ static const struct inode_operations ovl_symlink_inode_operations = {
        .get_link       = ovl_get_link,
        .readlink       = ovl_readlink,
        .getattr        = ovl_getattr,
-       .setxattr       = generic_setxattr,
-       .getxattr       = ovl_getxattr,
        .listxattr      = ovl_listxattr,
-       .removexattr    = generic_removexattr,
        .update_time    = ovl_update_time,
 };