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49e5fb4621
linux/fs/btrfs
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Qu Wenruo 49e5fb4621 btrfs: qgroup: export qgroups in sysfs 
This patch will add the following sysfs interface:

  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/referenced
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/exclusive
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/max_referenced
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/max_exclusive
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/limit_flags

Which is also available in output of "btrfs qgroup show".

  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_data
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_meta_pertrans
  /sys/fs/btrfs/<UUID>/qgroups/<qgroup_id>/rsv_meta_prealloc

The last 3 rsv related members are not visible to users, but can be very
useful to debug qgroup limit related bugs.

Also, to avoid '/' used in <qgroup_id>, the separator between qgroup
level and qgroup id is changed to '_'.

The interface is not hidden behind 'debug' as we want this interface to
be included into production build and to provide another way to read the
qgroup information besides the ioctls.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2020-07-27 12:55:37 +02:00
..
tests btrfs: make btrfs_set_extent_delalloc take btrfs_inode 2020-07-27 12:55:35 +02:00
acl.c
async-thread.c Btrfs: fix crash during unmount due to race with delayed inode workers 2020-03-23 17:01:51 +01:00
async-thread.h Btrfs: fix crash during unmount due to race with delayed inode workers 2020-03-23 17:01:51 +01:00
backref.c btrfs: fix double free on ulist after backref resolution failure 2020-07-21 21:59:15 +02:00
backref.h btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE 2020-05-25 11:25:35 +02:00
block-group.c btrfs: make btrfs_check_data_free_space take btrfs_inode 2020-07-27 12:55:36 +02:00
block-group.h btrfs: move the block group freeze/unfreeze helpers into block-group.c 2020-05-25 11:25:30 +02:00
block-rsv.c btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE 2020-05-25 11:25:35 +02:00
block-rsv.h btrfs: Remove __ prefix from btrfs_block_rsv_release 2020-03-23 17:01:55 +01:00
btrfs_inode.h Revert "btrfs: remove BTRFS_INODE_READDIO_NEED_LOCK" 2020-06-09 19:21:48 +02:00
check-integrity.c btrfs: check-integrity: remove unnecessary failure messages during memory allocation 2020-07-27 12:55:21 +02:00
check-integrity.h btrfs: remove btrfsic_submit_bh() 2020-03-23 17:01:39 +01:00
compression.c btrfs: make btrfs_submit_compressed_write take btrfs_inode 2020-07-27 12:55:31 +02:00
compression.h btrfs: make btrfs_submit_compressed_write take btrfs_inode 2020-07-27 12:55:31 +02:00
ctree.c btrfs: add little-endian optimized key helpers 2020-07-27 12:55:24 +02:00
ctree.h btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
delalloc-space.c btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
delalloc-space.h btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
delayed-inode.c btrfs: use nofs allocations for running delayed items 2020-03-25 16:26:00 +01:00
delayed-inode.h btrfs: delayed-inode: Replace zero-length array with flexible-array member 2020-03-23 17:01:53 +01:00
delayed-ref.c btrfs: Remove __ prefix from btrfs_block_rsv_release 2020-03-23 17:01:55 +01:00
delayed-ref.h
dev-replace.c btrfs: sysfs, rename device_link add/remove functions 2020-03-23 17:01:35 +01:00
dev-replace.h btrfs: add __pure attribute to functions 2019-11-18 12:46:52 +01:00
dir-item.c
discard.c btrfs: discard: add missing put when grabbing block group from unused list 2020-07-07 16:06:28 +02:00
discard.h btrfs: discard: Use the correct style for SPDX License Identifier 2020-04-20 17:43:42 +02:00
disk-io.c btrfs: remove unused btrfs_root::defrag_trans_start 2020-07-27 12:55:28 +02:00
disk-io.h btrfs: simplify root lookup by id 2020-05-25 11:25:36 +02:00
export.c btrfs: simplify iget helpers 2020-05-25 11:25:37 +02:00
export.h btrfs: export helpers for subvolume name/id resolution 2020-03-23 17:01:42 +01:00
extent_io.c btrfs: make writepage_delalloc take btrfs_inode 2020-07-27 12:55:35 +02:00
extent_io.h btrfs: don't use UAPI types for fiemap callback 2020-07-27 12:55:27 +02:00
extent_map.c Btrfs: fix race between using extent maps and merging them 2020-02-12 17:16:46 +01:00
extent_map.h btrfs: remove extent_map::bdev 2019-11-18 23:43:44 +01:00
extent-io-tree.h btrfs: fix corrupt log due to concurrent fsync of inodes with shared extents 2020-05-25 11:25:37 +02:00
extent-tree.c btrfs: rename BTRFS_ROOT_REF_COWS to BTRFS_ROOT_SHAREABLE 2020-05-25 11:25:35 +02:00
file-item.c btrfs: make btrfs_csum_one_bio takae btrfs_inode 2020-07-27 12:55:26 +02:00
file.c btrfs: make btrfs_check_data_free_space take btrfs_inode 2020-07-27 12:55:36 +02:00
free-space-cache.c btrfs: make btrfs_dirty_pages take btrfs_inode 2020-07-27 12:55:35 +02:00
free-space-cache.h btrfs: let btrfs_return_cluster_to_free_space() return void 2020-07-27 12:55:21 +02:00
free-space-tree.c btrfs: move the root freeing stuff into btrfs_put_root 2020-03-23 17:01:59 +01:00
free-space-tree.h btrfs: rename btrfs_block_group_cache 2019-11-18 17:51:51 +01:00
inode-item.c
inode-map.c btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
inode-map.h
inode.c btrfs: make btrfs_qgroup_check_reserved_leak take btrfs_inode 2020-07-27 12:55:37 +02:00
ioctl.c btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
Kconfig Revert "btrfs: switch to iomap_dio_rw() for dio" 2020-06-14 01:19:02 +02:00
locking.c btrfs: add missing annotation for btrfs_tree_lock() 2020-05-25 11:25:16 +02:00
locking.h btrfs: Implement DREW lock 2020-03-23 17:01:43 +01:00
lzo.c btrfs: compression: inline free_workspace 2019-11-18 12:46:59 +01:00
Makefile Btrfs: move all reflink implementation code into its own file 2020-03-23 17:01:54 +01:00
misc.h btrfs: rename tree_entry to rb_simple_node and export it 2020-05-25 11:25:19 +02:00
ordered-data.c btrfs: make btrfs_add_ordered_extent_dio take btrfs_inode 2020-07-27 12:55:34 +02:00
ordered-data.h btrfs: make btrfs_add_ordered_extent_dio take btrfs_inode 2020-07-27 12:55:34 +02:00
orphan.c
print-tree.c btrfs: Remove unneeded semicolon 2020-01-20 16:40:55 +01:00
print-tree.h
props.c btrfs: simplify iget helpers 2020-05-25 11:25:37 +02:00
props.h
qgroup.c btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
qgroup.h btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
raid56.c btrfs: use struct_size to calculate size of raid hash table 2020-03-23 17:01:44 +01:00
raid56.h
rcu-string.h btrfs: rcu-string: Replace zero-length array with flexible-array member 2020-03-23 17:01:53 +01:00
reada.c btrfs: rename btrfs_block_group_cache 2019-11-18 17:51:51 +01:00
ref-verify.c btrfs: convert comments to fallthrough annotations 2020-07-02 10:18:30 +02:00
ref-verify.h
reflink.c btrfs: make btrfs_delalloc_reserve_space take btrfs_inode 2020-07-27 12:55:36 +02:00
reflink.h Btrfs: move all reflink implementation code into its own file 2020-03-23 17:01:54 +01:00
relocation.c btrfs: make prealloc_file_extent_cluster take btrfs_inode 2020-07-27 12:55:37 +02:00
root-tree.c btrfs: simplify root lookup by id 2020-05-25 11:25:36 +02:00
scrub.c btrfs: scrub: clean up temporary page variables in scrub_checksum_tree_block 2020-07-27 12:55:23 +02:00
send.c for-5.8-tag 2020-06-02 19:59:25 -07:00
send.h
space-info.c btrfs: fix reclaim_size counter leak after stealing from global reserve 2020-07-02 10:18:34 +02:00
space-info.h btrfs: improve global reserve stealing logic 2020-05-25 11:25:22 +02:00
struct-funcs.c btrfs: update documentation of set/get helpers 2020-05-25 11:25:35 +02:00
super.c btrfs: start deprecation of mount option inode_cache 2020-07-27 12:55:28 +02:00
sysfs.c btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
sysfs.h btrfs: qgroup: export qgroups in sysfs 2020-07-27 12:55:37 +02:00
transaction.c btrfs: simplify root lookup by id 2020-05-25 11:25:36 +02:00
transaction.h btrfs: make btrfs_set_inode_last_trans take btrfs_inode 2020-07-27 12:55:37 +02:00
tree-checker.c btrfs: tree-checker: remove duplicate definition of 'inode_item_err' 2020-05-25 11:25:23 +02:00
tree-checker.h
tree-defrag.c btrfs: remove unused btrfs_root::defrag_trans_start 2020-07-27 12:55:28 +02:00
tree-log.c btrfs: make __btrfs_drop_extents take btrfs_inode 2020-07-27 12:55:26 +02:00
tree-log.h
ulist.c
ulist.h
uuid-tree.c btrfs: simplify root lookup by id 2020-05-25 11:25:36 +02:00
volumes.c btrfs: allow use of global block reserve for balance item deletion 2020-07-27 12:55:29 +02:00
volumes.h btrfs: convert comments to fallthrough annotations 2020-07-02 10:18:30 +02:00
xattr.c
xattr.h
zlib.c btrfs: use larger zlib buffer for s390 hardware compression 2020-01-31 10:30:40 -08:00
zstd.c btrfs: compression: inline free_workspace 2019-11-18 12:46:59 +01:00