We can use btrfs_open_dir() to check whether target dir is in btrfs's mount point before open, instead of checking it in kernel space of ioctl, and return fuzzy error message.
Before patch: # ./btrfs quota enable /mnt/tmp1 ERROR: quota command failed: Inappropriate ioctl for device # ./btrfs quota disable /mnt/tmp1 ERROR: quota command failed: Inappropriate ioctl for device # ./btrfs quota rescan /mnt/tmp1 ERROR: quota rescan failed: Inappropriate ioctl for device # After patch: # ./btrfs quota enable /mnt/tmp1 ERROR: not a btrfs filesystem: /mnt/tmp1 # ./btrfs quota disable /mnt/tmp1 ERROR: not a btrfs filesystem: /mnt/tmp1 # ./btrfs quota rescan /mnt/tmp1 ERROR: not a btrfs filesystem: /mnt/tmp1 # Signed-off-by: Zhao Lei <zhao...@cn.fujitsu.com> --- cmds-quota.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/cmds-quota.c b/cmds-quota.c index 8adc1bf..efbc3ef 100644 --- a/cmds-quota.c +++ b/cmds-quota.c @@ -45,11 +45,9 @@ static int quota_ctl(int cmd, int argc, char **argv) memset(&args, 0, sizeof(args)); args.cmd = cmd; - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access '%s'\n", path); + fd = btrfs_open_dir(path, &dirstream, 1); + if (fd < 0) return 1; - } ret = ioctl(fd, BTRFS_IOC_QUOTA_CTL, &args); e = errno; @@ -141,11 +139,9 @@ static int cmd_quota_rescan(int argc, char **argv) memset(&args, 0, sizeof(args)); path = argv[optind]; - fd = open_file_or_dir(path, &dirstream); - if (fd < 0) { - fprintf(stderr, "ERROR: can't access '%s'\n", path); + fd = btrfs_open_dir(path, &dirstream, 1); + if (fd < 0) return 1; - } ret = ioctl(fd, ioctlnum, &args); e = errno; -- 1.8.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html