diff options
| author | Josef Bacik <josef@toxicpanda.com> | 2020-10-16 11:29:15 -0400 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-12-08 15:53:40 +0100 |
| commit | ceafe3cc39923fc80b9091f3fd993e6de1b6a399 (patch) | |
| tree | 512b3df4873b322ad40278763130c05f393f27ef /fs | |
| parent | 334c16d82cfe180f7b262a6f8ae2d9379f032b18 (diff) | |
| download | linux-ceafe3cc39923fc80b9091f3fd993e6de1b6a399.tar.bz2 | |
btrfs: sysfs: export supported rescue= mount options
We're going to be adding a variety of different rescue options, we
should advertise which ones we support to make user spaces life easier
in the future.
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/sysfs.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 8424f5d0e5ed..8f0462d6855d 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -329,10 +329,32 @@ static ssize_t send_stream_version_show(struct kobject *kobj, } BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show); +static const char *rescue_opts[] = { + "usebackuproot", + "nologreplay", +}; + +static ssize_t supported_rescue_options_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + ssize_t ret = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(rescue_opts); i++) + ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s", + (i ? " " : ""), rescue_opts[i]); + ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n"); + return ret; +} +BTRFS_ATTR(static_feature, supported_rescue_options, + supported_rescue_options_show); + static struct attribute *btrfs_supported_static_feature_attrs[] = { BTRFS_ATTR_PTR(static_feature, rmdir_subvol), BTRFS_ATTR_PTR(static_feature, supported_checksums), BTRFS_ATTR_PTR(static_feature, send_stream_version), + BTRFS_ATTR_PTR(static_feature, supported_rescue_options), NULL }; |