diff options
Diffstat (limited to 'libbcachefs/chardev.c')
| -rw-r--r-- | libbcachefs/chardev.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libbcachefs/chardev.c b/libbcachefs/chardev.c index 24af2ca1..1ab36ac9 100644 --- a/libbcachefs/chardev.c +++ b/libbcachefs/chardev.c @@ -2,6 +2,7 @@ #include "bcachefs.h" #include "bcachefs_ioctl.h" +#include "buckets.h" #include "chardev.h" #include "super.h" #include "super-io.h" @@ -289,6 +290,79 @@ static long bch2_ioctl_disk_evacuate(struct bch_fs *c, return ret; } +static long bch2_ioctl_usage(struct bch_fs *c, + struct bch_ioctl_usage __user *user_arg) +{ + struct bch_ioctl_usage arg; + struct bch_dev *ca; + unsigned i, j; + int ret; + + if (copy_from_user(&arg, user_arg, sizeof(arg))) + return -EFAULT; + + for (i = 0; i < arg.nr_devices; i++) { + struct bch_ioctl_dev_usage dst = { .alive = 0 }; + + ret = copy_to_user(&user_arg->devs[i], &dst, sizeof(dst)); + if (ret) + return ret; + } + + { + struct bch_fs_usage src = bch2_fs_usage_read(c); + struct bch_ioctl_fs_usage dst = { + .capacity = c->capacity, + .used = bch2_fs_sectors_used(c, src), + .online_reserved = src.online_reserved, + }; + + for (i = 0; i < BCH_REPLICAS_MAX; i++) { + dst.persistent_reserved[i] = + src.s[i].persistent_reserved; + + for (j = 0; j < S_ALLOC_NR; j++) + dst.sectors[s_alloc_to_data_type(j)][i] = + src.s[i].data[j]; + } + + ret = copy_to_user(&user_arg->fs, &dst, sizeof(dst)); + if (ret) + return ret; + } + + for_each_member_device(ca, c, i) { + struct bch_dev_usage src = bch2_dev_usage_read(c, ca); + struct bch_ioctl_dev_usage dst = { + .alive = 1, + .state = ca->mi.state, + .bucket_size = ca->mi.bucket_size, + .nr_buckets = ca->mi.nbuckets - ca->mi.first_bucket, + }; + + if (ca->dev_idx >= arg.nr_devices) { + percpu_ref_put(&ca->ref); + return -ENOSPC; + } + + if (percpu_ref_tryget(&ca->io_ref)) { + dst.dev = huge_encode_dev(ca->disk_sb.bdev->bd_dev); + percpu_ref_put(&ca->io_ref); + } + + for (j = 0; j < BCH_DATA_NR; j++) { + dst.buckets[j] = src.buckets[j]; + dst.sectors[j] = src.sectors[j]; + } + + ret = copy_to_user(&user_arg->devs[i], &dst, sizeof(dst)); + if (ret) + return ret; + } + + return 0; +} + #define BCH_IOCTL(_name, _argtype) \ do { \ _argtype i; \ @@ -304,6 +378,8 @@ long bch2_fs_ioctl(struct bch_fs *c, unsigned cmd, void __user *arg) switch (cmd) { case BCH_IOCTL_QUERY_UUID: return bch2_ioctl_query_uuid(c, arg); + case BCH_IOCTL_USAGE: + return bch2_ioctl_usage(c, arg); } if (!capable(CAP_SYS_ADMIN)) |