Thread (3 messages) 3 messages, 2 authors, 2024-10-09

Re: [viro-vfs:work.xattr2] [fs/xattr] 64d47e878a: xfstests.xfs.046.fail

From: Al Viro <viro@zeniv.linux.org.uk>
Date: 2024-10-06 14:59:07
Also in: linux-alpha, linux-api, linux-arch, linux-arm-kernel, linux-fsdevel, linux-m68k, linux-mips, linux-s390, linux-sh, lkml, oe-lkp, sparclinux
Subsystem: filesystems (vfs and infrastructure), the rest · Maintainers: Alexander Viro, Christian Brauner, Linus Torvalds

On Sun, Oct 06, 2024 at 10:20:57PM +0800, kernel test robot wrote:
xfs/046       - output mismatch (see /lkp/benchmarks/xfstests/results//xfs/046.out.bad)
    --- tests/xfs/046.out	2024-09-30 21:13:44.000000000 +0000
    +++ /lkp/benchmarks/xfstests/results//xfs/046.out.bad	2024-10-06 05:31:50.379495110 +0000
    @@ -34,4 +34,8 @@
     xfsrestore: restore complete: SECS seconds elapsed
     xfsrestore: Restore Status: SUCCESS
     Comparing listing of dump directory with restore directory
    +ls: /fs/scratch/dumpdir/sub/a-link: No such file or directory
    +ls: /fs/scratch/dumpdir/sub/b-link: No such file or directory
    +ls: /fs/scratch/restoredir/dumpdir/sub/a-link: No such file or directory
    +ls: /fs/scratch/restoredir/dumpdir/sub/b-link: No such file or directory
    ...
    (Run 'diff -u /lkp/benchmarks/xfstests/tests/xfs/046.out /lkp/benchmarks/xfstests/results//xfs/046.out.bad'  to see the entire diff)
Ran: xfs/046
Failures: xfs/046
Failed 1 of 1 tests
*stares*

D'oh...  Inverted sense for AT_SYMLINK_NOFOLLOW => LOOKUP_FLAGS...

Try this:
diff --git a/fs/xattr.c b/fs/xattr.c
index 0b506b6565b7..b96cca3f4bf8 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -721,7 +721,7 @@ static int path_setxattrat(int dfd, const char __user *pathname,
 	if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
 		return -EINVAL;
 
-	if (at_flags & AT_SYMLINK_NOFOLLOW)
+	if (!(at_flags & AT_SYMLINK_NOFOLLOW))
 		lookup_flags = LOOKUP_FOLLOW;
 
 	error = setxattr_copy(name, &ctx);
@@ -880,7 +880,7 @@ static ssize_t path_getxattrat(int dfd, const char __user *pathname,
 		return file_getxattr(fd_file(f), &ctx);
 	} else {
 		int lookup_flags = 0;
-		if (at_flags & AT_SYMLINK_NOFOLLOW)
+		if (!(at_flags & AT_SYMLINK_NOFOLLOW))
 			lookup_flags = LOOKUP_FOLLOW;
 		return filename_getxattr(dfd, filename, lookup_flags, &ctx);
 	}
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