If I scan I device with a btrfs with -A, it finds it:
(~/btrfs-progs-unstable) sudo ./btrfsctl -A /dev/sda5
operation complete
Btrfs v0.19-1-g4f89b6e-dirty
But when I do a "scan all devices", it can't find my btrfs on /dev/sda5:
(~/btrfs-progs-unstable) sudo ./btrfsctl -a
Scanning for Btrfs filesystems
failed to read /dev/sr0
I'm using btrfs-progs-unstable version
4f89b6eb0718ade63152791db32794da78fbba70. Am I doing something wrong or
misinterpreting how btrfsctl works?
I notice that "-a" does a:
ret = btrfs_scan_one_device(fd, fullpath, &tmp_devices,
&num_devices,
BTRFS_SUPER_INFO_OFFSET);
Whereas "-A" does a:
fd = open("/dev/btrfs-control", O_RDWR);
if (fd < 0) {
perror("failed to open /dev/btrfs-control");
exit(1);
}
Followed by a:
ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
Should "-a" be taught to follow "-A"? I could make a patch if so...
jr
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