From f920dbce8d8161fff30e3e75ebfc71e978d9bea4 Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Mon, 13 Jan 2014 21:14:55 +0800 Subject: btrfs-progs: btrfsck operations should be exclusive this patch will make btrfsck operations to open disk in exclusive mode, so that mount will fail when btrfsck is running Signed-off-by: Anand Jain Signed-off-by: David Sterba Signed-off-by: Chris Mason --- disk-io.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'disk-io.c') diff --git a/disk-io.c b/disk-io.c index 8009b947..e4550bd4 100644 --- a/disk-io.c +++ b/disk-io.c @@ -1057,6 +1057,7 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path, struct btrfs_fs_devices *fs_devices = NULL; struct extent_buffer *eb; int ret; + int oflags; if (sb_bytenr == 0) sb_bytenr = BTRFS_SUPER_INFO_OFFSET; @@ -1080,9 +1081,14 @@ static struct btrfs_fs_info *__open_ctree_fd(int fp, const char *path, fs_info->fs_devices = fs_devices; if (flags & OPEN_CTREE_WRITES) - ret = btrfs_open_devices(fs_devices, O_RDWR); + oflags = O_RDWR; else - ret = btrfs_open_devices(fs_devices, O_RDONLY); + oflags = O_RDONLY; + + if (flags & OPEN_CTREE_EXCLUSIVE) + oflags |= O_EXCL; + + ret = btrfs_open_devices(fs_devices, oflags); if (ret) goto out_devices; -- cgit v1.2.3