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add mounted-checking for btrfs-vol

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Adding a mounted device is dangerous because it will destroy the filesystem
on that mounted device. So we add mounted-checking for btrfs-vol.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
This commit is contained in:
Miao Xie 2010-09-09 13:41:47 +08:00 committed by Chris Mason
parent 595cb1df15
commit ddf85067bb
1 changed files with 16 additions and 2 deletions
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18
btrfs-vol.c
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@ -108,10 +108,24 @@ int main(int ac, char **av)
if (device && strcmp(device, "missing") == 0 &&
cmd == BTRFS_IOC_RM_DEV) {
fprintf(stderr, "removing missing devices from %s\n", mnt);
} else if (device) {
} else if (cmd != BTRFS_IOC_BALANCE) {
if (cmd == BTRFS_IOC_ADD_DEV) {
ret = check_mounted(device);
if (ret < 0) {
fprintf(stderr,
"error checking %s mount status\n",
device);
exit(1);
}
if (ret == 1) {
fprintf(stderr, "%s is mounted\n", device);
exit(1);
}
}
devfd = open(device, O_RDWR);
if (!devfd) {
if (devfd < 0) {
fprintf(stderr, "Unable to open device %s\n", device);
exit(1);
}
ret = fstat(devfd, &st);
if (ret) {