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vfs: Fix the posix_acl_xattr_list return value 

When a filesystem that contains POSIX ACLs is mounted without ACL support
(-o noacl), the appropriate behavior is not to list any existing POSIX ACL
xattrs.  The return value for list xattr handlers in this case is 0, not an
error code: several filesystems that use the POSIX ACL xattr handlers do
not expect the list operation to fail.

Symlinks cannot have ACLs, so posix_acl_xattr_list will never be called for
symlinks in the first place.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Andreas Gruenbacher 2015-11-03 15:25:08 +01:00 committed by Al Viro
parent c361016ade
commit dae5f57a72
1 changed files with 1 additions and 3 deletions
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4
fs/posix_acl.c
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@ -833,9 +833,7 @@ posix_acl_xattr_list(struct dentry *dentry, char *list, size_t list_size,
size_t size;
if (!IS_POSIXACL(d_backing_inode(dentry)))
return -EOPNOTSUPP;
if (d_is_symlink(dentry))
return -EOPNOTSUPP;
return 0;
if (type == ACL_TYPE_ACCESS)
xname = POSIX_ACL_XATTR_ACCESS;