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#include <getopt.h>
#include <sys/uio.h>
#include <unistd.h>
#include "cmds.h"
#include "libbcachefs/error.h"
#include "libbcachefs.h"
#include "libbcachefs/super.h"
#include "tools-util.h"
static void fsck_usage(void)
{
puts("bcachefs fsck - filesystem check and repair\n"
"Usage: bcachefs fsck [OPTION]... <devices>\n"
"\n"
"Options:\n"
" -p Automatic repair (no questions)\n"
" -n Don't repair, only check for errors\n"
" -y Assume \"yes\" to all questions\n"
" -f Force checking even if filesystem is marked clean\n"
" -r, --ratelimit_errors Don't display more than 10 errors of a given type\n"
" -R, --reconstruct_alloc Reconstruct the alloc btree\n"
" -k, --kernel Use the in-kernel fsck implementation\n"
" -v Be verbose\n"
" -h, --help Display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
}
static void setnonblocking(int fd)
{
int flags = fcntl(fd, F_GETFL);
if (fcntl(fd, F_SETFL, flags|O_NONBLOCK))
die("fcntl error: %m");
}
static int do_splice(int rfd, int wfd)
{
char buf[4096], *b = buf;
int r = read(rfd, buf, sizeof(buf));
if (r < 0 && errno == EAGAIN)
return 0;
if (r < 0)
return r;
if (!r)
return 1;
do {
ssize_t w = write(wfd, b, r);
if (w < 0)
die("%s: write error: %m", __func__);
r -= w;
b += w;
} while (r);
return 0;
}
static int splice_fd_to_stdinout(int fd)
{
setnonblocking(STDIN_FILENO);
setnonblocking(fd);
while (true) {
fd_set fds;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
FD_SET(fd, &fds);
select(fd + 1, &fds, NULL, NULL, NULL);
int r = do_splice(fd, STDOUT_FILENO) ?:
do_splice(STDIN_FILENO, fd);
if (r)
return r < 0 ? r : 0;
}
return 0;
}
static int fsck_online(const char *dev_path)
{
int dev_idx;
struct bchfs_handle fs = bchu_fs_open_by_dev(dev_path, &dev_idx);
struct bch_ioctl_fsck_online fsck = { 0 };
int fsck_fd = ioctl(fs.ioctl_fd, BCH_IOCTL_FSCK_ONLINE, &fsck);
if (fsck_fd < 0)
die("BCH_IOCTL_FSCK_ONLINE error: %s", bch2_err_str(fsck_fd));
return splice_fd_to_stdinout(fsck_fd);
}
static void append_opt(struct printbuf *out, const char *opt)
{
if (out->pos)
prt_char(out, ',');
prt_str(out, opt);
}
int cmd_fsck(int argc, char *argv[])
{
static const struct option longopts[] = {
{ "ratelimit_errors", no_argument, NULL, 'r' },
{ "reconstruct_alloc", no_argument, NULL, 'R' },
{ "kernel", no_argument, NULL, 'k' },
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
bool kernel = false;
int opt, ret = 0;
struct printbuf opts_str = PRINTBUF;
append_opt(&opts_str, "degraded");
append_opt(&opts_str, "fsck");
append_opt(&opts_str, "fix_errors=ask");
append_opt(&opts_str, "read_only");
while ((opt = getopt_long(argc, argv,
"apynfo:rRkvh",
longopts, NULL)) != -1)
switch (opt) {
case 'a': /* outdated alias for -p */
case 'p':
case 'y':
append_opt(&opts_str, "fix_errors=yes");
break;
case 'n':
append_opt(&opts_str, "nochanges");
append_opt(&opts_str, "fix_errors=no");
break;
case 'f':
/* force check, even if filesystem marked clean: */
break;
case 'o':
append_opt(&opts_str, optarg);
break;
case 'r':
append_opt(&opts_str, "ratelimit_errors");
break;
case 'R':
append_opt(&opts_str, "reconstruct_alloc");
break;
case 'k':
kernel = true;
break;
case 'v':
append_opt(&opts_str, "verbose");
break;
case 'h':
fsck_usage();
exit(16);
}
args_shift(optind);
if (!argc) {
fprintf(stderr, "Please supply device(s) to check\n");
exit(8);
}
darray_str devs = get_or_split_cmdline_devs(argc, argv);
if (!kernel) {
struct bch_opts opts = bch2_opts_empty();
ret = bch2_parse_mount_opts(NULL, &opts, opts_str.buf);
if (ret)
return ret;
darray_for_each(devs, i)
if (dev_mounted(*i))
return fsck_online(*i);
struct bch_fs *c = bch2_fs_open(devs.data, devs.nr, opts);
if (IS_ERR(c))
exit(8);
if (test_bit(BCH_FS_errors_fixed, &c->flags)) {
fprintf(stderr, "%s: errors fixed\n", c->name);
ret |= 1;
}
if (test_bit(BCH_FS_error, &c->flags)) {
fprintf(stderr, "%s: still has errors\n", c->name);
ret |= 4;
}
bch2_fs_stop(c);
} else {
struct bch_ioctl_fsck_offline *fsck = calloc(sizeof(*fsck) +
sizeof(u64) * devs.nr, 1);
fsck->opts = (unsigned long)opts_str.buf;
darray_for_each(devs, i)
fsck->devs[i - devs.data] = (unsigned long) *i;
fsck->nr_devs = devs.nr;
int ctl_fd = bcachectl_open();
int fsck_fd = ioctl(ctl_fd, BCH_IOCTL_FSCK_OFFLINE, fsck);
if (fsck_fd < 0)
die("BCH_IOCTL_FSCK_OFFLINE error: %s", bch2_err_str(fsck_fd));
ret = splice_fd_to_stdinout(fsck_fd);
free(fsck);
}
printbuf_exit(&opts_str);
return ret;
}
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