diff options
Diffstat (limited to 'fs/bcachefs/chardev.c')
| -rw-r--r-- | fs/bcachefs/chardev.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/bcachefs/chardev.c b/fs/bcachefs/chardev.c index 0e76e06ab844..cbadba4027c2 100644 --- a/fs/bcachefs/chardev.c +++ b/fs/bcachefs/chardev.c @@ -557,6 +557,34 @@ err: return ret; } +static long bch2_ioctl_query_accounting(struct bch_fs *c, + struct bch_ioctl_query_accounting __user *user_arg) +{ + struct bch_ioctl_query_accounting arg; + darray_char accounting = {}; + int ret = 0; + + if (!test_bit(BCH_FS_started, &c->flags)) + return -EINVAL; + + ret = copy_from_user_errcode(&arg, user_arg, sizeof(arg)) ?: + bch2_fs_accounting_read(c, &accounting, arg.accounting_types_mask) ?: + (arg.accounting_u64s * sizeof(u64) < accounting.nr ? -ERANGE : 0) ?: + copy_to_user_errcode(&user_arg->accounting, accounting.data, accounting.nr); + if (ret) + goto err; + + arg.capacity = c->capacity; + arg.used = bch2_fs_usage_read_short(c).used; + arg.online_reserved = percpu_u64_get(c->online_reserved); + arg.accounting_u64s = accounting.nr / sizeof(u64); + + ret = copy_to_user_errcode(user_arg, &arg, sizeof(arg)); +err: + darray_exit(&accounting); + return ret; +} + /* obsolete, didn't allow for new data types: */ static long bch2_ioctl_dev_usage(struct bch_fs *c, struct bch_ioctl_dev_usage __user *user_arg) @@ -910,6 +938,8 @@ long bch2_fs_ioctl(struct bch_fs *c, unsigned cmd, void __user *arg) BCH_IOCTL(disk_resize_journal, struct bch_ioctl_disk_resize_journal); case BCH_IOCTL_FSCK_ONLINE: BCH_IOCTL(fsck_online, struct bch_ioctl_fsck_online); + case BCH_IOCTL_QUERY_ACCOUNTING: + return bch2_ioctl_query_accounting(c, arg); default: return -ENOTTY; } |