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Diffstat (limited to 'fs/btrfs/sysfs.c')
-rw-r--r--fs/btrfs/sysfs.c122
1 files changed, 67 insertions, 55 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 25a6f587852b..ba78ca5aabbb 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -177,7 +177,7 @@ static ssize_t btrfs_feature_attr_show(struct kobject *kobj,
} else
val = can_modify_feature(fa);
- return scnprintf(buf, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(buf, "%d\n", val);
}
static ssize_t btrfs_feature_attr_store(struct kobject *kobj,
@@ -283,9 +283,11 @@ BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES);
BTRFS_FEAT_ATTR_INCOMPAT(metadata_uuid, METADATA_UUID);
BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE);
BTRFS_FEAT_ATTR_INCOMPAT(raid1c34, RAID1C34);
-/* Remove once support for zoned allocation is feature complete */
#ifdef CONFIG_BTRFS_DEBUG
+/* Remove once support for zoned allocation is feature complete */
BTRFS_FEAT_ATTR_INCOMPAT(zoned, ZONED);
+/* Remove once support for extent tree v2 is feature complete */
+BTRFS_FEAT_ATTR_INCOMPAT(extent_tree_v2, EXTENT_TREE_V2);
#endif
#ifdef CONFIG_FS_VERITY
BTRFS_FEAT_ATTR_COMPAT_RO(verity, VERITY);
@@ -314,6 +316,7 @@ static struct attribute *btrfs_supported_feature_attrs[] = {
BTRFS_FEAT_ATTR_PTR(raid1c34),
#ifdef CONFIG_BTRFS_DEBUG
BTRFS_FEAT_ATTR_PTR(zoned),
+ BTRFS_FEAT_ATTR_PTR(extent_tree_v2),
#endif
#ifdef CONFIG_FS_VERITY
BTRFS_FEAT_ATTR_PTR(verity),
@@ -330,7 +333,7 @@ static const struct attribute_group btrfs_feature_attr_group = {
static ssize_t rmdir_subvol_show(struct kobject *kobj,
struct kobj_attribute *ka, char *buf)
{
- return scnprintf(buf, PAGE_SIZE, "0\n");
+ return sysfs_emit(buf, "0\n");
}
BTRFS_ATTR(static_feature, rmdir_subvol, rmdir_subvol_show);
@@ -345,12 +348,12 @@ static ssize_t supported_checksums_show(struct kobject *kobj,
* This "trick" only works as long as 'enum btrfs_csum_type' has
* no holes in it
*/
- ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%s%s",
- (i == 0 ? "" : " "), btrfs_super_csum_name(i));
+ ret += sysfs_emit_at(buf, ret, "%s%s", (i == 0 ? "" : " "),
+ btrfs_super_csum_name(i));
}
- ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
+ ret += sysfs_emit_at(buf, ret, "\n");
return ret;
}
BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show);
@@ -358,7 +361,7 @@ BTRFS_ATTR(static_feature, supported_checksums, supported_checksums_show);
static ssize_t send_stream_version_show(struct kobject *kobj,
struct kobj_attribute *ka, char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", BTRFS_SEND_STREAM_VERSION);
+ return sysfs_emit(buf, "%d\n", BTRFS_SEND_STREAM_VERSION);
}
BTRFS_ATTR(static_feature, send_stream_version, send_stream_version_show);
@@ -378,9 +381,8 @@ static ssize_t supported_rescue_options_show(struct kobject *kobj,
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");
+ ret += sysfs_emit_at(buf, ret, "%s%s", (i ? " " : ""), rescue_opts[i]);
+ ret += sysfs_emit_at(buf, ret, "\n");
return ret;
}
BTRFS_ATTR(static_feature, supported_rescue_options,
@@ -394,10 +396,10 @@ static ssize_t supported_sectorsizes_show(struct kobject *kobj,
/* 4K sector size is also supported with 64K page size */
if (PAGE_SIZE == SZ_64K)
- ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%u ", SZ_4K);
+ ret += sysfs_emit_at(buf, ret, "%u ", SZ_4K);
/* Only sectorsize == PAGE_SIZE is now supported */
- ret += scnprintf(buf + ret, PAGE_SIZE - ret, "%lu\n", PAGE_SIZE);
+ ret += sysfs_emit_at(buf, ret, "%lu\n", PAGE_SIZE);
return ret;
}
@@ -437,7 +439,7 @@ static ssize_t btrfs_discardable_bytes_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%lld\n",
+ return sysfs_emit(buf, "%lld\n",
atomic64_read(&fs_info->discard_ctl.discardable_bytes));
}
BTRFS_ATTR(discard, discardable_bytes, btrfs_discardable_bytes_show);
@@ -448,7 +450,7 @@ static ssize_t btrfs_discardable_extents_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%d\n",
+ return sysfs_emit(buf, "%d\n",
atomic_read(&fs_info->discard_ctl.discardable_extents));
}
BTRFS_ATTR(discard, discardable_extents, btrfs_discardable_extents_show);
@@ -459,8 +461,8 @@ static ssize_t btrfs_discard_bitmap_bytes_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%llu\n",
- fs_info->discard_ctl.discard_bitmap_bytes);
+ return sysfs_emit(buf, "%llu\n",
+ fs_info->discard_ctl.discard_bitmap_bytes);
}
BTRFS_ATTR(discard, discard_bitmap_bytes, btrfs_discard_bitmap_bytes_show);
@@ -470,7 +472,7 @@ static ssize_t btrfs_discard_bytes_saved_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%lld\n",
+ return sysfs_emit(buf, "%lld\n",
atomic64_read(&fs_info->discard_ctl.discard_bytes_saved));
}
BTRFS_ATTR(discard, discard_bytes_saved, btrfs_discard_bytes_saved_show);
@@ -481,8 +483,8 @@ static ssize_t btrfs_discard_extent_bytes_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%llu\n",
- fs_info->discard_ctl.discard_extent_bytes);
+ return sysfs_emit(buf, "%llu\n",
+ fs_info->discard_ctl.discard_extent_bytes);
}
BTRFS_ATTR(discard, discard_extent_bytes, btrfs_discard_extent_bytes_show);
@@ -492,8 +494,8 @@ static ssize_t btrfs_discard_iops_limit_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%u\n",
- READ_ONCE(fs_info->discard_ctl.iops_limit));
+ return sysfs_emit(buf, "%u\n",
+ READ_ONCE(fs_info->discard_ctl.iops_limit));
}
static ssize_t btrfs_discard_iops_limit_store(struct kobject *kobj,
@@ -523,8 +525,8 @@ static ssize_t btrfs_discard_kbps_limit_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%u\n",
- READ_ONCE(fs_info->discard_ctl.kbps_limit));
+ return sysfs_emit(buf, "%u\n",
+ READ_ONCE(fs_info->discard_ctl.kbps_limit));
}
static ssize_t btrfs_discard_kbps_limit_store(struct kobject *kobj,
@@ -553,8 +555,8 @@ static ssize_t btrfs_discard_max_discard_size_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%llu\n",
- READ_ONCE(fs_info->discard_ctl.max_discard_size));
+ return sysfs_emit(buf, "%llu\n",
+ READ_ONCE(fs_info->discard_ctl.max_discard_size));
}
static ssize_t btrfs_discard_max_discard_size_store(struct kobject *kobj,
@@ -627,7 +629,7 @@ static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf)
val = *value_ptr;
if (lock)
spin_unlock(lock);
- return scnprintf(buf, PAGE_SIZE, "%llu\n", val);
+ return sysfs_emit(buf, "%llu\n", val);
}
static ssize_t global_rsv_size_show(struct kobject *kobj,
@@ -673,7 +675,7 @@ static ssize_t raid_bytes_show(struct kobject *kobj,
val += block_group->used;
}
up_read(&sinfo->groups_sem);
- return scnprintf(buf, PAGE_SIZE, "%llu\n", val);
+ return sysfs_emit(buf, "%llu\n", val);
}
/*
@@ -771,7 +773,7 @@ static ssize_t btrfs_label_show(struct kobject *kobj,
ssize_t ret;
spin_lock(&fs_info->super_lock);
- ret = scnprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label);
+ ret = sysfs_emit(buf, label[0] ? "%s\n" : "%s", label);
spin_unlock(&fs_info->super_lock);
return ret;
@@ -819,7 +821,7 @@ static ssize_t btrfs_nodesize_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
+ return sysfs_emit(buf, "%u\n", fs_info->super_copy->nodesize);
}
BTRFS_ATTR(, nodesize, btrfs_nodesize_show);
@@ -829,8 +831,7 @@ static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%u\n",
- fs_info->super_copy->sectorsize);
+ return sysfs_emit(buf, "%u\n", fs_info->super_copy->sectorsize);
}
BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show);
@@ -840,7 +841,7 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
+ return sysfs_emit(buf, "%u\n", fs_info->super_copy->sectorsize);
}
BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show);
@@ -852,7 +853,7 @@ static ssize_t quota_override_show(struct kobject *kobj,
int quota_override;
quota_override = test_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags);
- return scnprintf(buf, PAGE_SIZE, "%d\n", quota_override);
+ return sysfs_emit(buf, "%d\n", quota_override);
}
static ssize_t quota_override_store(struct kobject *kobj,
@@ -890,8 +891,7 @@ static ssize_t btrfs_metadata_uuid_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%pU\n",
- fs_info->fs_devices->metadata_uuid);
+ return sysfs_emit(buf, "%pU\n", fs_info->fs_devices->metadata_uuid);
}
BTRFS_ATTR(, metadata_uuid, btrfs_metadata_uuid_show);
@@ -902,9 +902,9 @@ static ssize_t btrfs_checksum_show(struct kobject *kobj,
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
u16 csum_type = btrfs_super_csum_type(fs_info->super_copy);
- return scnprintf(buf, PAGE_SIZE, "%s (%s)\n",
- btrfs_super_csum_name(csum_type),
- crypto_shash_driver_name(fs_info->csum_shash));
+ return sysfs_emit(buf, "%s (%s)\n",
+ btrfs_super_csum_name(csum_type),
+ crypto_shash_driver_name(fs_info->csum_shash));
}
BTRFS_ATTR(, checksum, btrfs_checksum_show);
@@ -922,6 +922,9 @@ static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj,
case BTRFS_EXCLOP_BALANCE:
str = "balance\n";
break;
+ case BTRFS_EXCLOP_BALANCE_PAUSED:
+ str = "balance paused\n";
+ break;
case BTRFS_EXCLOP_DEV_ADD:
str = "device add\n";
break;
@@ -941,7 +944,7 @@ static ssize_t btrfs_exclusive_operation_show(struct kobject *kobj,
str = "UNKNOWN\n";
break;
}
- return scnprintf(buf, PAGE_SIZE, "%s", str);
+ return sysfs_emit(buf, "%s", str);
}
BTRFS_ATTR(, exclusive_operation, btrfs_exclusive_operation_show);
@@ -950,7 +953,7 @@ static ssize_t btrfs_generation_show(struct kobject *kobj,
{
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
- return scnprintf(buf, PAGE_SIZE, "%llu\n", fs_info->generation);
+ return sysfs_emit(buf, "%llu\n", fs_info->generation);
}
BTRFS_ATTR(, generation, btrfs_generation_show);
@@ -1028,8 +1031,7 @@ static ssize_t btrfs_bg_reclaim_threshold_show(struct kobject *kobj,
struct btrfs_fs_info *fs_info = to_fs_info(kobj);
ssize_t ret;
- ret = scnprintf(buf, PAGE_SIZE, "%d\n",
- READ_ONCE(fs_info->bg_reclaim_threshold));
+ ret = sysfs_emit(buf, "%d\n", READ_ONCE(fs_info->bg_reclaim_threshold));
return ret;
}
@@ -1108,6 +1110,11 @@ static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj)
static char btrfs_unknown_feature_names[FEAT_MAX][NUM_FEATURE_BITS][BTRFS_FEATURE_NAME_MAX];
static struct btrfs_feature_attr btrfs_feature_attrs[FEAT_MAX][NUM_FEATURE_BITS];
+static_assert(ARRAY_SIZE(btrfs_unknown_feature_names) ==
+ ARRAY_SIZE(btrfs_feature_attrs));
+static_assert(ARRAY_SIZE(btrfs_unknown_feature_names[0]) ==
+ ARRAY_SIZE(btrfs_feature_attrs[0]));
+
static const u64 supported_feature_masks[FEAT_MAX] = {
[FEAT_COMPAT] = BTRFS_FEATURE_COMPAT_SUPP,
[FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP,
@@ -1276,11 +1283,6 @@ static void init_feature_attrs(void)
struct btrfs_feature_attr *fa;
int set, i;
- BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names) !=
- ARRAY_SIZE(btrfs_feature_attrs));
- BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names[0]) !=
- ARRAY_SIZE(btrfs_feature_attrs[0]));
-
memset(btrfs_feature_attrs, 0, sizeof(btrfs_feature_attrs));
memset(btrfs_unknown_feature_names, 0,
sizeof(btrfs_unknown_feature_names));
@@ -1471,7 +1473,7 @@ static ssize_t btrfs_devinfo_in_fs_metadata_show(struct kobject *kobj,
val = !!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
- return scnprintf(buf, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(buf, "%d\n", val);
}
BTRFS_ATTR(devid, in_fs_metadata, btrfs_devinfo_in_fs_metadata_show);
@@ -1484,7 +1486,7 @@ static ssize_t btrfs_devinfo_missing_show(struct kobject *kobj,
val = !!test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state);
- return scnprintf(buf, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(buf, "%d\n", val);
}
BTRFS_ATTR(devid, missing, btrfs_devinfo_missing_show);
@@ -1498,7 +1500,7 @@ static ssize_t btrfs_devinfo_replace_target_show(struct kobject *kobj,
val = !!test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state);
- return scnprintf(buf, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(buf, "%d\n", val);
}
BTRFS_ATTR(devid, replace_target, btrfs_devinfo_replace_target_show);
@@ -1509,8 +1511,7 @@ static ssize_t btrfs_devinfo_scrub_speed_max_show(struct kobject *kobj,
struct btrfs_device *device = container_of(kobj, struct btrfs_device,
devid_kobj);
- return scnprintf(buf, PAGE_SIZE, "%llu\n",
- READ_ONCE(device->scrub_speed_max));
+ return sysfs_emit(buf, "%llu\n", READ_ONCE(device->scrub_speed_max));
}
static ssize_t btrfs_devinfo_scrub_speed_max_store(struct kobject *kobj,
@@ -1538,10 +1539,20 @@ static ssize_t btrfs_devinfo_writeable_show(struct kobject *kobj,
val = !!test_bit(BTRFS_DEV_STATE_WRITEABLE, &device->dev_state);
- return scnprintf(buf, PAGE_SIZE, "%d\n", val);
+ return sysfs_emit(buf, "%d\n", val);
}
BTRFS_ATTR(devid, writeable, btrfs_devinfo_writeable_show);
+static ssize_t btrfs_devinfo_fsid_show(struct kobject *kobj,
+ struct kobj_attribute *a, char *buf)
+{
+ struct btrfs_device *device = container_of(kobj, struct btrfs_device,
+ devid_kobj);
+
+ return sysfs_emit(buf, "%pU\n", device->fs_devices->fsid);
+}
+BTRFS_ATTR(devid, fsid, btrfs_devinfo_fsid_show);
+
static ssize_t btrfs_devinfo_error_stats_show(struct kobject *kobj,
struct kobj_attribute *a, char *buf)
{
@@ -1549,14 +1560,14 @@ static ssize_t btrfs_devinfo_error_stats_show(struct kobject *kobj,
devid_kobj);
if (!device->dev_stats_valid)
- return scnprintf(buf, PAGE_SIZE, "invalid\n");
+ return sysfs_emit(buf, "invalid\n");
/*
* Print all at once so we get a snapshot of all values from the same
* time. Keep them in sync and in order of definition of
* btrfs_dev_stat_values.
*/
- return scnprintf(buf, PAGE_SIZE,
+ return sysfs_emit(buf,
"write_errs %d\n"
"read_errs %d\n"
"flush_errs %d\n"
@@ -1577,6 +1588,7 @@ BTRFS_ATTR(devid, error_stats, btrfs_devinfo_error_stats_show);
*/
static struct attribute *devid_attrs[] = {
BTRFS_ATTR_PTR(devid, error_stats),
+ BTRFS_ATTR_PTR(devid, fsid),
BTRFS_ATTR_PTR(devid, in_fs_metadata),
BTRFS_ATTR_PTR(devid, missing),
BTRFS_ATTR_PTR(devid, replace_target),
generated by cgit v1.2.3 (git 2.25.1) at 2025-02-28 15:42:30 +0000