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btrfs-progs: judge the return value of check_mounted more accurately

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For btrfs-convert, btrfstune, btrfs rescue, they report "device busy"
when given a device that does not actually exist e.g.

	# btrfstune -x abcdefg (this device does not exist)
	$ ...device busy...

We deal with this case by add "ret < 0" error check when
judging the return value of check_mounted.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Gui Hecheng 2014-02-20 10:49:03 +08:00 committed by Chris Mason
parent 64fddab8ac
commit 51a40f6df0
3 changed files with 23 additions and 5 deletions
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7
btrfs-convert.c
View File

@ -2729,7 +2729,12 @@ int main(int argc, char *argv[])
}
file = argv[optind];
if (check_mounted(file)) {
ret = check_mounted(file);
if (ret < 0) {
fprintf(stderr, "Could not check mount status: %s\n",
strerror(-ret));
return 1;
} else if (ret) {
fprintf(stderr, "%s is mounted\n", file);
return 1;
}

7
btrfstune.c
View File

@ -151,7 +151,12 @@ int main(int argc, char *argv[])
return 1;
}
if (check_mounted(device)) {
ret = check_mounted(device);
if (ret < 0) {
fprintf(stderr, "Could not check mount status: %s\n",
strerror(-ret));
return 1;
} else if (ret) {
fprintf(stderr, "%s is mounted\n", device);
return 1;
}

14
cmds-rescue.c
View File

@ -80,9 +80,13 @@ int cmd_chunk_recover(int argc, char *argv[])
file = argv[optind];
ret = check_mounted(file);
if (ret) {
if (ret < 0) {
fprintf(stderr, "Could not check mount status: %s\n",
strerror(-ret));
return 1;
} else if (ret) {
fprintf(stderr, "the device is busy\n");
return ret;
return 1;
}
ret = btrfs_recover_chunk_tree(file, verbose, yes);
@ -133,7 +137,11 @@ int cmd_super_recover(int argc, char **argv)
dname = argv[optind];
ret = check_mounted(dname);
if (ret) {
if (ret < 0) {
fprintf(stderr, "Could not check mount status: %s\n",
strerror(-ret));
return 1;
} else if (ret) {
fprintf(stderr, "the device is busy\n");
return 1;
}