From: Andrey Albershteyn <aalbersh@kernel.org>
Date: Thu, 21 May 2026 08:26:46 +0000 (+0200)
Subject: generic/791: don't run if kernel misses FANOTIFY
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=c1dcfe62b3f95d323224e9b8087ab0e6df69c993;p=xfstests-dev.git

generic/791: don't run if kernel misses FANOTIFY

If FANOTIFY=no in the kernel, then fs-monitor will fail to start. Fix
fs-monitor error codes to detect and skip the test on "Function not
implemented" code.

Signed-off-by: Andrey Albershteyn <aalbersh@kernel.org>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zorro Lang <zlang@kernel.org>
---

diff --git a/src/fs-monitor.c b/src/fs-monitor.c
index 0cf09677..dd91a5d7 100644
--- a/src/fs-monitor.c
+++ b/src/fs-monitor.c
@@ -117,6 +117,8 @@ next_event:
 int main(int argc, char **argv)
 {
 	int fd;
+	int opt;
+	int check = 0;
 
 	char buffer[BUFSIZ];
 
@@ -125,14 +127,29 @@ int main(int argc, char **argv)
 		return 1;
 	}
 
+	while ((opt = getopt(argc, argv, "c")) != -1) {
+		switch (opt) {
+		case 'c':
+			check = 1;
+			break;
+		default:
+			fprintf(stderr, "Usage: %s [-c] path\n",
+				argv[0]);
+			exit(EXIT_FAILURE);
+		}
+	}
+
 	fd = fanotify_init(FAN_CLASS_NOTIF|FAN_REPORT_FID, O_RDONLY);
+	if (check)
+		exit(fd < 0);
+
 	if (fd < 0) {
 		perror("fanotify_init");
 		errx(1, "fanotify_init");
 	}
 
 	if (fanotify_mark(fd, FAN_MARK_ADD|FAN_MARK_FILESYSTEM,
-			  FAN_FS_ERROR, AT_FDCWD, argv[1])) {
+			  FAN_FS_ERROR, AT_FDCWD, argv[optind])) {
 		perror("fanotify_mark");
 		errx(1, "fanotify_mark");
 	}
diff --git a/tests/generic/791 b/tests/generic/791
index 90242292..edefbb77 100755
--- a/tests/generic/791
+++ b/tests/generic/791
@@ -65,6 +65,9 @@ _dmerror_mount >> $seqres.full 2>&1
 
 test $FSTYP = xfs && _xfs_force_bdev data $SCRATCH_MNT
 
+$here/src/fs-monitor -c $SCRATCH_MNT &> /dev/null || \
+		_notrun "fanotify too old"
+
 # Write a file with 4 file blocks worth of data, figure out the LBA to target
 victim=$SCRATCH_MNT/a
 file_blksz=$(_get_file_block_size $SCRATCH_MNT)