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Qu Wenruo 894d137818 btrfs: subpage: add overview comments 
This patch adds an overview how btrfs subpage support works:

- limitations
- behavior
- basic implementation points

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2021-04-19 17:25:18 +02:00
..
tests
idmapped-mounts-v5.12
2021-02-23 13:39:45 -08:00
acl.c
fs: make helpers idmap mount aware
2021-01-24 14:27:20 +01:00
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: move the tree mod log code into its own file
2021-04-19 17:25:16 +02:00
backref.h
btrfs: add asserts for deleting backref cache nodes
2021-02-08 22:58:56 +01:00
block-group.c
btrfs: fix exhaustion of the system chunk array due to concurrent allocations
2021-04-19 17:25:17 +02:00
block-group.h
btrfs: fix race between writes to swap files and scrub
2021-02-22 18:07:15 +01:00
block-rsv.c
btrfs: introduce mount option rescue=ignorebadroots
2020-12-08 15:53:41 +01:00
block-rsv.h
btrfs: Remove __ prefix from btrfs_block_rsv_release
2020-03-23 17:01:55 +01:00
btrfs_inode.h
btrfs: remove stale comment and logic from btrfs_inode_in_log()
2021-04-19 17:25:16 +02:00
check-integrity.c
btrfs: integrity-checker: convert block context kmap's to kmap_local_page
2021-04-19 17:25:16 +02:00
check-integrity.h
btrfs: remove btrfsic_submit_bh()
2020-03-23 17:01:39 +01:00
compression.c
btrfs: convert kmap to kmap_local_page, simple cases
2021-04-19 17:25:16 +02:00
compression.h
btrfs: compression: move declarations to header
2020-10-07 12:06:55 +02:00
ctree.c
btrfs: improve btree readahead for full send operations
2021-04-19 17:25:17 +02:00
ctree.h
btrfs: improve btree readahead for full send operations
2021-04-19 17:25:17 +02:00
delalloc-space.c
btrfs: fix parameter description of btrfs_inode_rsv_release/btrfs_delalloc_release_space
2021-02-08 22:58:54 +01:00
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 btrfs_inode_lock/btrfs_inode_unlock inode lock helpers
2021-04-19 17:25:15 +02:00
delayed-inode.h
btrfs: make btrfs_delayed_update_inode take btrfs_inode
2020-12-08 15:54:10 +01:00
delayed-ref.c
btrfs: update debug message when checking seq number of a delayed ref
2021-04-19 17:25:17 +02:00
delayed-ref.h
btrfs: only let one thread pre-flush delayed refs in commit
2021-02-08 22:58:56 +01:00
dev-replace.c
btrfs: do not initialize dev replace for bad dev root
2021-03-17 19:42:14 +01:00
dev-replace.h
btrfs: zoned: mark block groups to copy for device-replace
2021-02-09 02:46:07 +01:00
dir-item.c
btrfs: locking: rip out path->leave_spinning
2020-12-08 15:54:02 +01:00
discard.c
btrfs: document now parameter of peek_discard_list
2021-02-08 22:58:53 +01:00
discard.h
btrfs: cleanup btrfs_discard_update_discardable usage
2020-12-08 15:54:02 +01:00
disk-io.c
btrfs: subpage: support metadata checksum calculation at write time
2021-04-19 17:25:18 +02:00
disk-io.h
btrfs: split alloc_log_tree()
2021-02-09 02:46:07 +01:00
export.c
btrfs: locking: rip out path->leave_spinning
2020-12-08 15:54:02 +01:00
export.h
btrfs: export helpers for subvolume name/id resolution
2020-03-23 17:01:42 +01:00
extent_io.c
btrfs: make set_btree_ioerr accept extent buffer and be subpage compatible
2021-04-19 17:25:18 +02:00
extent_io.h
btrfs: zoned: redirty released extent buffers
2021-02-09 02:46:04 +01:00
extent_map.c
btrfs: fix parameter description of btrfs_add_extent_mapping
2021-02-08 22:58:53 +01:00
extent_map.h
btrfs: remove extent_map::bdev
2019-11-18 23:43:44 +01:00
extent-io-tree.h
btrfs: use fixed width int type for extent_state::state
2020-12-08 15:54:13 +01:00
extent-tree.c
btrfs: use the new bit BTRFS_FS_TREE_MOD_LOG_USERS at btrfs_free_tree_block()
2021-04-19 17:25:16 +02:00
file-item.c
btrfs: remove duplicated in_range() macro
2021-04-19 17:25:16 +02:00
file.c
btrfs: fix a potential hole punching failure
2021-04-19 17:25:17 +02:00
free-space-cache.c
btrfs: zoned: do not account freed region of read-only block group as zone_unusable
2021-03-04 16:16:58 +01:00
free-space-cache.h
btrfs: zoned: track unusable bytes for zones
2021-02-09 02:46:03 +01:00
free-space-tree.c
btrfs: fix possible free space tree corruption with online conversion
2021-01-25 18:44:37 +01:00
free-space-tree.h
btrfs: rename btrfs_block_group_cache
2019-11-18 17:51:51 +01:00
inode-item.c
btrfs: locking: rip out path->leave_spinning
2020-12-08 15:54:02 +01:00
inode.c
btrfs: remove unnecessary variable shadowing in btrfs_invalidatepage()
2021-04-19 17:25:18 +02:00
ioctl.c
btrfs: use btrfs_inode_lock/btrfs_inode_unlock inode lock helpers
2021-04-19 17:25:15 +02:00
Kconfig
btrfs: switch to iomap for direct IO
2020-10-07 12:06:57 +02:00
locking.c
btrfs: remove the recurse parameter from __btrfs_tree_read_lock
2020-12-08 15:54:09 +01:00
locking.h
btrfs: remove the recurse parameter from __btrfs_tree_read_lock
2020-12-08 15:54:09 +01:00
lzo.c
btrfs: convert kmap to kmap_local_page, simple cases
2021-04-19 17:25:16 +02:00
Makefile
btrfs: move the tree mod log code into its own file
2021-04-19 17:25:16 +02:00
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: replace offset_in_entry with in_range
2021-04-19 17:25:14 +02:00
ordered-data.h
btrfs: fix comment for btrfs ordered extent flag bits
2021-04-19 17:25:14 +02:00
orphan.c
…
print-tree.c
btrfs: print the actual offset in btrfs_root_name
2021-01-07 17:25:05 +01:00
print-tree.h
btrfs: print the actual offset in btrfs_root_name
2021-01-07 17:25:05 +01:00
props.c
btrfs: simplify iget helpers
2020-05-25 11:25:37 +02:00
props.h
…
qgroup.c
btrfs: move the tree mod log code into its own file
2021-04-19 17:25:16 +02:00
qgroup.h
btrfs: export and rename qgroup_reserve_meta
2021-03-02 16:58:30 +01:00
raid56.c
btrfs: raid56: convert kmaps to kmap_local_page
2021-04-19 17:25:16 +02:00
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: subpage: make readahead work properly
2021-03-16 11:06:21 +01:00
ref-verify.c
btrfs: ref-verify: use 'inline void' keyword ordering
2021-03-02 16:55:40 +01:00
ref-verify.h
…
reflink.c
btrfs: make reflinks respect O_SYNC O_DSYNC and S_SYNC flags
2021-04-19 17:25:17 +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: use btrfs_inode_lock/btrfs_inode_unlock inode lock helpers
2021-04-19 17:25:15 +02:00
root-tree.c
btrfs: qgroup: fix qgroup meta rsv leak for subvolume operations
2020-10-07 12:12:13 +02:00
scrub.c
btrfs: scrub: drop a few function declarations
2021-04-19 17:25:14 +02:00
send.c
btrfs: improve btree readahead for full send operations
2021-04-19 17:25:17 +02:00
send.h
btrfs: send: avoid copying file data
2020-10-07 12:13:17 +02:00
space-info.c
btrfs: use percpu_read_positive instead of sum_positive for need_preempt
2021-04-19 17:25:17 +02:00
space-info.h
btrfs: zoned: track unusable bytes for zones
2021-02-09 02:46:03 +01:00
struct-funcs.c
btrfs: handle sectorsize < PAGE_SIZE case for extent buffer accessors
2020-12-09 19:16:10 +01:00
subpage.c
btrfs: subpage: add overview comments
2021-04-19 17:25:18 +02:00
subpage.h
btrfs: subpage: introduce helpers for writeback status
2021-04-19 17:25:18 +02:00
super.c
btrfs: fix spurious free_space_tree remount warning
2021-03-02 16:55:55 +01:00
sysfs.c
btrfs: add sysfs interface for supported sectorsize
2021-04-19 17:25:18 +02:00
sysfs.h
btrfs: split and refactor btrfs_sysfs_remove_devices_dir
2020-10-07 12:12:21 +02:00
transaction.c
btrfs: fix exhaustion of the system chunk array due to concurrent allocations
2021-04-19 17:25:17 +02:00
transaction.h
btrfs: fix exhaustion of the system chunk array due to concurrent allocations
2021-04-19 17:25:17 +02:00
tree-checker.c
btrfs: tree-checker: do not error out if extent ref hash doesn't match
2021-02-22 18:07:44 +01:00
tree-checker.h
…
tree-defrag.c
btrfs: locking: remove all the blocking helpers
2020-12-08 15:54:01 +01:00
tree-log.c
btrfs: zoned: move log tree node allocation out of log_root_tree->log_mutex
2021-04-19 17:25:17 +02:00
tree-log.h
btrfs: make fast fsyncs wait only for writeback
2020-10-07 12:06:56 +02:00
tree-mod-log.c
btrfs: add and use helper to get lowest sequence number for the tree mod log
2021-04-19 17:25:17 +02:00
tree-mod-log.h
btrfs: add and use helper to get lowest sequence number for the tree mod log
2021-04-19 17:25:17 +02:00
ulist.c
…
ulist.h
…
uuid-tree.c
btrfs: remove unnecessary casts in printk
2020-12-08 15:53:52 +01:00
volumes.c
btrfs: zoned: bail out in btrfs_alloc_chunk for bad input
2021-04-19 17:25:17 +02:00
volumes.h
btrfs: zoned: relocate block group to repair IO failure in zoned filesystems
2021-02-09 02:46:07 +01:00
xattr.c
for-5.12-rc1-tag
2021-03-05 12:21:14 -08:00
xattr.h
…
zlib.c
btrfs: use memcpy_[to|from]_page() and kmap_local_page()
2021-02-26 12:45:15 +01:00
zoned.c
for-5.12-rc6-tag
2021-04-11 11:53:36 -07:00
zoned.h
btrfs: zoned: extend zoned allocator to use dedicated tree-log block group
2021-02-09 02:46:08 +01:00
zstd.c
btrfs: use memcpy_[to|from]_page() and kmap_local_page()
2021-02-26 12:45:15 +01:00