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cmd_set_option: Can now set device options

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This allows data_allowed (and others) to be set on an offline
filesystem.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-07-15 19:57:50 -04:00
parent 32fbdff2a9
commit 8594891772
1 changed files with 99 additions and 33 deletions
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94
c_src/cmd_option.c
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@ -36,16 +36,28 @@ static void set_option_usage(void)
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);
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);
struct bch_opts open_opts = bch2_opts_empty();
unsigned i;
int opt, ret = 0;
opt_set(open_opts, nostart, true);
while ((opt = getopt(argc, argv, "h")) != -1)
switch (opt) {
case 'h':
@ -59,9 +71,16 @@ int cmd_set_option(int argc, char *argv[])
exit(EXIT_FAILURE);
}
bool online = false;
for (i = 0; i < argc; i++)
if (dev_mounted(argv[i]))
goto online;
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)) {
@ -69,7 +88,11 @@ int cmd_set_option(int argc, char *argv[])
exit(EXIT_FAILURE);
}
mutex_lock(&c->sb_lock);
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))
@ -77,31 +100,74 @@ int cmd_set_option(int argc, char *argv[])
ret = bch2_opt_check_may_set(c, i, v);
if (ret < 0) {
fprintf(stderr, "error setting %s: %i\n",
bch2_opt_table[i].attr.name, ret);
break;
fprintf(stderr, "error setting %s: %i\n", opt->attr.name, ret);
continue;
}
bch2_opt_set_sb(c, bch2_opt_table + i, v);
bch2_opt_set_by_id(&c->opts, i, v);
if (!(opt->flags & (OPT_FS|OPT_DEVICE)))
fprintf(stderr, "Can't set option %s\n", opt->attr.name);
if (opt->flags & OPT_FS) {
__bch2_opt_set_sb(c->disk_sb.sb, -1, opt, v);
}
if (opt->flags & OPT_DEVICE) {
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->disk_sb.sb, dev_idx, opt, v);
}
}
}
bch2_write_super(c);
mutex_unlock(&c->sb_lock);
bch2_fs_stop(c);
return ret;
online:
{
} 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;
char *path = mprintf("options/%s", bch2_opt_table[i].attr.name);
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;
}