[GIT PULL] Btrfs updates for 5.6

From: David Sterba
Date: Mon Jan 27 2020 - 11:31:16 EST

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Hi,

please pull the following updates for btrfs, thanks.

Features, highlights:

* async discard
* "mount -o discard=async" to enable it
* freed extents are not discarded immediatelly, but grouped together and
trimmed later, with IO rate limiting
* the "sync" mode submits short extents that could have been ignored
completely by the device, for SATA prior to 3.1 the requests are
unqueued and have a big impact on performance
* the actual discard IO requests have been moved out of transaction
commit to a worker thread, improving commit latency
* IO rate and request size can be tuned by sysfs files, for now enabled
only with CONFIG_BTRFS_DEBUG as we might need to add/delete the files
and don't have a stable-ish ABI for general use, defaults are
conservative

* export device state info in sysfs, eg. missing, writeable

* no discard of extents known to be untouched on disk (eg. after
reservation)

* device stats reset is logged with process name and PID that called the
ioctl

Fixes:

* fix missing hole after hole punching and fsync when using NO_HOLES

* writeback: range cyclic mode could miss some dirty pages and lead to OOM

* two more corner cases for metadata_uuid change after power loss during
the change

* fix infinite loop during fsync after mix of rename operations

Core changes:

* qgroup assign returns ENOTCONN when quotas not enabled, used to return
EINVAL that was confusing

* device closing does not need to allocate memory anymore

* snapshot aware code got removed, disabled for years due to performance
problems, reimplmentation will allow to select wheter defrag breaks or
does not break COW on shared extents

* tree-checker:
* check leaf chunk item size, cross check against number of stripes
* verify location keys for DIR_ITEM, DIR_INDEX and XATTR items

* new self test for physical -> logical mapping code, used for super block
range exclusion

* assertion helpers/macros updated to avoid objtool "unreachable code"
reports on older compilers or config option combinations

----------------------------------------------------------------
The following changes since commit def9d2780727cec3313ed3522d0123158d87224d:

Linux 5.5-rc7 (2020-01-19 16:02:49 -0800)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.6-tag

for you to fetch changes up to 4e19443da1941050b346f8fc4c368aa68413bc88:

btrfs: free block groups after free'ing fs trees (2020-01-23 17:24:39 +0100)

----------------------------------------------------------------
Anand Jain (6):
btrfs: sysfs, rename devices kobject holder to devices_kobj
btrfs: sysfs, btrfs_sysfs_add_fsid() drop unused argument parent
btrfs: sysfs, rename btrfs_sysfs_add_device()
btrfs: sysfs, merge btrfs_sysfs_add devices_kobj and fsid
btrfs: device stats, log when stats are zeroed
btrfs: sysfs, add devid/dev_state kobject and device attributes

David Sterba (5):
btrfs: use raid_attr table in calc_stripe_length for nparity
btrfs: fill ncopies for all raid table entries
btrfs: remove unused member btrfs_device::work
btrfs: safely advance counter when looking up bio csums
btrfs: separate definition of assertion failure handlers

Dennis Zhou (24):
bitmap: genericize percpu bitmap region iterators
btrfs: rename DISCARD mount option to to DISCARD_SYNC
btrfs: keep track of which extents have been discarded
btrfs: keep track of free space bitmap trim status cleanliness
btrfs: add the beginning of async discard, discard workqueue
btrfs: handle empty block_group removal for async discard
btrfs: discard one region at a time in async discard
btrfs: sysfs: add removal calls for debug/
btrfs: sysfs: make UUID/debug have its own kobject
btrfs: sysfs: add UUID/debug/discard directory
btrfs: track discardable extents for async discard
btrfs: keep track of discardable_bytes for async discard
btrfs: calculate discard delay based on number of extents
btrfs: add kbps discard rate limit for async discard
btrfs: limit max discard size for async discard
btrfs: make max async discard size tunable
btrfs: have multiple discard lists
btrfs: only keep track of data extents for async discard
btrfs: keep track of discard reuse stats
btrfs: add async discard implementation overview
btrfs: increase the metadata allowance for the free_space_cache
btrfs: make smaller extents more likely to go into bitmaps
btrfs: ensure removal of discardable_* in free_bitmap()
btrfs: add correction to handle -1 edge case in async discard

Filipe Manana (2):
Btrfs: fix missing hole after hole punching and fsync when using NO_HOLES
Btrfs: fix infinite loop during fsync after rename operations

Johannes Thumshirn (6):
btrfs: fix possible NULL-pointer dereference in integrity checks
btrfs: remove superfluous BUG_ON() in integrity checks
btrfs: remove impossible WARN_ON in btrfs_destroy_dev_replace_tgtdev()
btrfs: decrement number of open devices after closing the device not before
btrfs: reset device back to allocation state when removing
btrfs: remove unnecessary wrapper get_alloc_profile

Josef Bacik (6):
btrfs: don't pass system_chunk into can_overcommit
btrfs: kill min_allocable_bytes in inc_block_group_ro
btrfs: fix improper setting of scanned for range cyclic write cache pages
btrfs: drop log root for dropped roots
btrfs: set trans->drity in btrfs_commit_transaction
btrfs: free block groups after free'ing fs trees

Marcos Paulo de Souza (2):
btrfs: qgroup: remove one-time use variables for quota_root checks
btrfs: qgroup: return ENOTCONN instead of EINVAL when quotas are not enabled

Nikolay Borisov (12):
btrfs: Don't discard unwritten extents
btrfs: Open code __btrfs_free_reserved_extent in btrfs_free_reserved_extent
btrfs: Rename __btrfs_free_reserved_extent to btrfs_pin_reserved_extent
btrfs: Remove WARN_ON in walk_log_tree
btrfs: Remove redundant WARN_ON in walk_down_log_tree
btrfs: Opencode ordered_data_tree_panic
btrfs: Move and unexport btrfs_rmap_block
btrfs: selftests: Add support for dummy devices
btrfs: Add self-tests for btrfs_rmap_block
btrfs: Refactor btrfs_rmap_block to improve readability
btrfs: Handle another split brain scenario with metadata uuid feature
btrfs: Fix split-brain handling when changing FSID to metadata uuid

Omar Sandoval (11):
btrfs: use simple_dir_inode_operations for placeholder subvolume directory
btrfs: get rid of trivial __btrfs_lookup_bio_sums() wrappers
btrfs: get rid of at_offset parameter to btrfs_lookup_bio_sums()
btrfs: remove dead snapshot-aware defrag code
btrfs: make btrfs_ordered_extent naming consistent with btrfs_file_extent_item
btrfs: remove unnecessary pg_offset assignments in __extent_writepage()
btrfs: remove trivial goto label in __extent_writepage()
btrfs: remove redundant i_size check in __extent_writepage_io()
btrfs: drop create parameter to btrfs_get_extent()
btrfs: simplify compressed/inline check in __extent_writepage_io()
btrfs: remove struct find_free_extent.ram_bytes

Qu Wenruo (6):
btrfs: relocation: Output current relocation stage at btrfs_relocate_block_group()
btrfs: tree-checker: Check leaf chunk item size
btrfs: tree-checker: Clean up fs_info parameter from error message wrapper
btrfs: tree-checker: Refactor inode key check into seperate function
btrfs: tree-checker: Refactor root key check into separate function
btrfs: tree-checker: Verify location key for DIR_ITEM/DIR_INDEX

Su Yue (2):
btrfs: Call find_fsid from find_fsid_inprogress
btrfs: Factor out metadata_uuid code from find_fsid.

Yunfeng Ye (1):
btrfs: remove unused condition check in btrfs_page_mkwrite()

zhengbin (1):
btrfs: Remove unneeded semicolon

fs/btrfs/Makefile | 2 +-
fs/btrfs/block-group.c | 212 ++++++++--
fs/btrfs/block-group.h | 40 ++
fs/btrfs/check-integrity.c | 4 +-
fs/btrfs/compression.c | 4 +-
fs/btrfs/ctree.h | 81 +++-
fs/btrfs/dev-replace.c | 1 +
fs/btrfs/discard.c | 702 ++++++++++++++++++++++++++++++++
fs/btrfs/discard.h | 41 ++
fs/btrfs/disk-io.c | 37 +-
fs/btrfs/disk-io.h | 4 +-
fs/btrfs/extent-tree.c | 50 +--
fs/btrfs/extent_io.c | 54 +--
fs/btrfs/extent_io.h | 6 +-
fs/btrfs/file-item.c | 41 +-
fs/btrfs/file.c | 23 +-
fs/btrfs/free-space-cache.c | 619 ++++++++++++++++++++++++----
fs/btrfs/free-space-cache.h | 41 +-
fs/btrfs/inode-map.c | 13 +-
fs/btrfs/inode.c | 834 ++++----------------------------------
fs/btrfs/ioctl.c | 2 +-
fs/btrfs/ordered-data.c | 81 ++--
fs/btrfs/ordered-data.h | 26 +-
fs/btrfs/print-tree.c | 2 +-
fs/btrfs/qgroup.c | 44 +-
fs/btrfs/relocation.c | 20 +-
fs/btrfs/scrub.c | 7 +-
fs/btrfs/space-info.c | 42 +-
fs/btrfs/super.c | 39 +-
fs/btrfs/sysfs.c | 394 ++++++++++++++++--
fs/btrfs/sysfs.h | 5 +-
fs/btrfs/tests/btrfs-tests.c | 29 ++
fs/btrfs/tests/btrfs-tests.h | 1 +
fs/btrfs/tests/extent-map-tests.c | 154 ++++++-
fs/btrfs/tests/inode-tests.c | 44 +-
fs/btrfs/transaction.c | 30 +-
fs/btrfs/tree-checker.c | 225 +++++++---
fs/btrfs/tree-log.c | 455 +++++++--------------
fs/btrfs/volumes.c | 284 ++++++-------
fs/btrfs/volumes.h | 10 +-
include/linux/bitmap.h | 35 ++
include/trace/events/btrfs.h | 6 +-
mm/percpu.c | 61 +--
43 files changed, 3042 insertions(+), 1763 deletions(-)
create mode 100644 fs/btrfs/discard.c
create mode 100644 fs/btrfs/discard.h

Next message: Rafael J. Wysocki: "[GIT PULL] Power management updates for v5.6-rc1"
Previous message: Phil Auld: "Re: [PATCH v3]sched/rt: Stop for_each_process_thread() iterations in tg_has_rt_tasks()"
Next in thread: pr-tracker-bot: "Re: [GIT PULL] Btrfs updates for 5.6"
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