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bcachefs: create internal disk_groups sysfs file

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We have bch2_sb_disk_groups_to_text() to dump disk group labels, but
no good information on device group membership at runtime. Add
bch2_disk_groups_to_text() and an associated 'disk_groups' sysfs
file to print group and device relationships.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Brian Foster
2023-05-30 14:41:50 -04:00
committed by Kent Overstreet
parent 28551613b7
commit fec4fc82b5
3 changed files with 42 additions and 0 deletions
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6
fs/bcachefs/sysfs.c
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@ -223,6 +223,7 @@ static void bch2_write_refs_to_text(struct printbuf *out, struct bch_fs *c)
#endif
read_attribute(internal_uuid);
read_attribute(disk_groups);
read_attribute(has_data);
read_attribute(alloc_debug);
@ -471,6 +472,9 @@ SHOW(bch2_fs)
if (attr == &sysfs_nocow_lock_table)
bch2_nocow_locks_to_text(out, &c->nocow_locks);
if (attr == &sysfs_disk_groups)
bch2_disk_groups_to_text(out, c);
return 0;
}
@ -681,6 +685,8 @@ struct attribute *bch2_fs_internal_files[] = {
&sysfs_moving_ctxts,
&sysfs_internal_uuid,
&sysfs_disk_groups,
NULL
};