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/*
* Authors: Kent Overstreet <kent.overstreet@gmail.com>
*
* GPLv2
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include "cmds.h"
#include "libbcachefs.h"
#include "libbcachefs/errcode.h"
#include "libbcachefs/opts.h"
#include "libbcachefs/super-io.h"
static void set_option_usage(void)
{
puts("bcachefs set-fs-option \n"
"Usage: bcachefs set-fs-option [OPTION].. device\n"
"\n"
"Options:\n");
bch2_opts_usage(OPT_MOUNT|OPT_RUNTIME);
puts(" -d, --dev-idx index for device specific options\n"
" -h, --help display this help and exit\n"
"Report bugs to <linux-bcachefs@vger.kernel.org>");
exit(EXIT_SUCCESS);
}
static int name_to_dev_idx(struct bch_fs *c, const char *dev)
{
int ret = -1;
rcu_read_lock();
for_each_member_device_rcu(c, ca, NULL)
if (!strcmp(ca->name, dev)) {
ret = ca->dev_idx;
break;
}
rcu_read_unlock();
return ret;
}
int cmd_set_option(int argc, char *argv[])
{
struct bch_opt_strs new_opt_strs = bch2_cmdline_opts_get(&argc, argv, OPT_MOUNT|OPT_DEVICE);
struct bch_opts new_opts = bch2_parse_opts(new_opt_strs);
DARRAY(unsigned) dev_idxs = {};
int opt, ret = 0;
static const struct option longopts[] = {
{ "dev-idx", required_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ NULL }
};
while ((opt = getopt_long(argc, argv, "d:h", longopts, NULL)) != -1)
switch (opt) {
case 'd': {
unsigned dev_idx;
if (kstrtoint(optarg, 10, &dev_idx))
die("error parsing %s", optarg);
darray_push(&dev_idxs, dev_idx);
break;
}
case 'h':
set_option_usage();
break;
}
args_shift(optind);
if (!argc) {
fprintf(stderr, "Please supply device(s)\n");
exit(EXIT_FAILURE);
}
bool online = false;
unsigned i;
for (i = 0; i < argc; i++)
if (dev_mounted(argv[i])) {
online = true;
break;
}
if (!online) {
struct bch_opts open_opts = bch2_opts_empty();
opt_set(open_opts, nostart, true);
struct bch_fs *c = bch2_fs_open(argv, argc, open_opts);
if (IS_ERR(c)) {
fprintf(stderr, "error opening %s: %s\n", argv[0], bch2_err_str(PTR_ERR(c)));
exit(EXIT_FAILURE);
}
for (i = 0; i < bch2_opts_nr; i++) {
const struct bch_option *opt = bch2_opt_table + i;
u64 v = bch2_opt_get_by_id(&new_opts, i);
if (!bch2_opt_defined_by_id(&new_opts, i))
continue;
if (!(opt->flags & (OPT_FS|OPT_DEVICE)))
fprintf(stderr, "Can't set option %s\n", opt->attr.name);
if (opt->flags & OPT_FS) {
ret = bch2_opt_check_may_set(c, NULL, i, v);
if (ret < 0) {
fprintf(stderr, "error setting %s: %i\n", opt->attr.name, ret);
continue;
}
bch2_opt_set_sb(c, NULL, opt, v);
}
if (opt->flags & OPT_DEVICE) {
if (dev_idxs.nr) {
darray_for_each(dev_idxs, dev) {
struct bch_dev *ca = bch2_dev_tryget_noerror(c, *dev);
if (!ca) {
fprintf(stderr, "Couldn't look up device %u\n", *dev);
continue;
}
ret = bch2_opt_check_may_set(c, ca, i, v);
if (ret < 0) {
fprintf(stderr, "error setting %s: %i\n", opt->attr.name, ret);
continue;
}
bch2_opt_set_sb(c, ca, opt, v);
bch2_dev_put(ca);
}
} else {
for (unsigned dev = 0; dev < argc; dev++) {
int dev_idx = name_to_dev_idx(c, argv[dev]);
if (dev_idx < 0) {
fprintf(stderr, "Couldn't look up device %s\n", argv[i]);
continue;
}
bch2_opt_set_sb(c, c->devs[dev_idx], opt, v);
}
}
}
}
bch2_fs_stop(c);
return ret;
} else {
unsigned dev_idx;
struct bchfs_handle fs = bchu_fs_open_by_dev(argv[i], &dev_idx);
for (i = 0; i < argc; i++) {
struct bchfs_handle fs2 = bchu_fs_open_by_dev(argv[i], &dev_idx);
if (memcmp(&fs.uuid, &fs2.uuid, sizeof(fs2.uuid)))
die("Filesystem mounted, but not all devices are members");
bcache_fs_close(fs2);
}
for (i = 0; i < bch2_opts_nr; i++) {
if (!new_opt_strs.by_id[i])
continue;
const struct bch_option *opt = bch2_opt_table + i;
if (!(opt->flags & (OPT_FS|OPT_DEVICE)))
fprintf(stderr, "Can't set option %s\n", opt->attr.name);
if (opt->flags & OPT_FS) {
char *path = mprintf("options/%s", opt->attr.name);
write_file_str(fs.sysfs_fd, path, new_opt_strs.by_id[i]);
free(path);
}
if (opt->flags & OPT_DEVICE) {
for (unsigned dev = 0; dev < argc; dev++) {
struct bchfs_handle fs2 = bchu_fs_open_by_dev(argv[i], &dev_idx);
bcache_fs_close(fs2);
char *path = mprintf("dev-%u/%s", dev_idx, opt->attr.name);
write_file_str(fs.sysfs_fd, path, new_opt_strs.by_id[i]);
free(path);
}
}
}
}
return 0;
}
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