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alistair23-linux/fs/btrfs
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Qu Wenruo 43b18595d6 btrfs: qgroup: Use separate meta reservation type for delalloc 
Before this patch, btrfs qgroup is mixing per-transcation meta rsv with
preallocated meta rsv, making it quite easy to underflow qgroup meta
reservation.

Since we have the new qgroup meta rsv types, apply it to delalloc
reservation.

Now for delalloc, most of its reserved space will use META_PREALLOC qgroup
rsv type.

And for callers reducing outstanding extent like btrfs_finish_ordered_io(),
they will convert corresponding META_PREALLOC reservation to
META_PERTRANS.

This is mainly due to the fact that current qgroup numbers will only be
updated in btrfs_commit_transaction(), that's to say if we don't keep
such placeholder reservation, we can exceed qgroup limitation.

And for callers freeing outstanding extent in error handler, we will
just free META_PREALLOC bytes.

This behavior makes callers of btrfs_qgroup_release_meta() or
btrfs_qgroup_convert_meta() to be aware of which type they are.
So in this patch, btrfs_delalloc_release_metadata() and its callers get
an extra parameter to info qgroup to do correct meta convert/release.

The good news is, even we use the wrong type (convert or free), it won't
cause obvious bug, as prealloc type is always in good shape, and the
type only affects how per-trans meta is increased or not.

So the worst case will be at most metadata limitation can be sometimes
exceeded (no convert at all) or metadata limitation is reached too soon
(no free at all).

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-31 01:41:14 +02:00
..
tests Btrfs: extent map selftest: add missing void parameter to btrfs_test_extent_map 2018-03-26 15:09:29 +02:00
acl.c btrfs: drop underscores from exported xattr functions 2018-03-26 15:09:41 +02:00
async-thread.c Btrfs: fix confusing worker helper info in stacktrace 2017-10-30 12:27:57 +01:00
async-thread.h btrfs: constify tracepoint arguments 2017-08-16 14:19:53 +02:00
backref.c btrfs: Remove unused op_key var from add_delayed_refs 2018-03-31 01:26:57 +02:00
backref.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
btrfs_inode.h btrfs: open code trivial helper btrfs_page_exists_in_range 2018-03-31 01:26:50 +02:00
check-integrity.c btrfs: Remove custom crc32c init code 2018-03-26 15:09:39 +02:00
check-integrity.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
compression.c btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
compression.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
ctree.c btrfs: kill tree_mod_log_set_root_pointer helper 2018-03-31 01:26:55 +02:00
ctree.h btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
dedupe.h btrfs: expand cow_file_range() to support in-band dedup and subpage-blocksize 2016-07-26 13:52:25 +02:00
delayed-inode.c btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
delayed-inode.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
delayed-ref.c btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
delayed-ref.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
dev-replace.c btrfs: log, when replace, is canceled by the user 2018-03-26 15:09:34 +02:00
dev-replace.h btrfs: btrfs_dev_replace_cancel() can return int 2018-03-26 15:09:30 +02:00
dir-item.c btrfs: Remove custom crc32c init code 2018-03-26 15:09:39 +02:00
disk-io.c btrfs: qgroup: Don't use root->qgroup_meta_rsv for qgroup 2018-03-31 01:41:14 +02:00
disk-io.h btrfs: separate types for submit_bio_start and submit_bio_done 2018-03-31 01:26:55 +02:00
export.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
export.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
extent-tree.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
extent_io.c btrfs: document more parameters of submit_extent_page 2018-03-31 01:26:53 +02:00
extent_io.h btrfs: remove unused parameters from extent_submit_bio_done_t 2018-03-31 01:26:55 +02:00
extent_map.c btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
extent_map.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
file-item.c Merge branch 'for-4.13-part1' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-07-05 16:41:23 -07:00
file.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
free-space-cache.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
free-space-cache.h btrfs: free-space-cache, clean up unnecessary root arguments 2017-02-17 12:03:56 +01:00
free-space-tree.c btrfs: use reada direction enum instead of constant value in load_free_space_tree 2018-03-26 15:09:37 +02:00
free-space-tree.h btrfs: expose internal free space tree routine only if sanity tests are enabled 2017-08-18 16:36:29 +02:00
inode-item.c btrfs: Remove custom crc32c init code 2018-03-26 15:09:39 +02:00
inode-map.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
inode-map.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
inode.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
ioctl.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
Kconfig btrfs: Remove custom crc32c init code 2018-03-26 15:09:39 +02:00
locking.c btrfs: Relax memory barrier in btrfs_tree_unlock 2018-03-31 01:26:51 +02:00
locking.h btrfs: fix lockups from btrfs_clear_path_blocking 2014-11-19 10:34:35 -08:00
lzo.c btrfs: Remove unused tot_len var from lzo_decompress 2018-03-31 01:26:57 +02:00
Makefile btrfs: Remove custom crc32c init code 2018-03-26 15:09:39 +02:00
math.h btrfs: cleanup 64bit/32bit divs, compile time constants 2015-03-03 17:23:57 +01:00
ordered-data.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
ordered-data.h btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
orphan.c btrfs: kill the key type accessor helpers 2014-09-17 13:37:12 -07:00
print-tree.c Btrfs: add one more sanity check for shared ref type 2017-08-21 17:47:43 +02:00
print-tree.h btrfs: get fs_info from eb in btrfs_print_tree, remove argument 2017-08-16 16:12:03 +02:00
props.c btrfs: drop underscores from exported xattr functions 2018-03-26 15:09:41 +02:00
props.h Btrfs: add support for inode properties 2014-01-28 13:20:24 -08:00
qgroup.c btrfs: qgroup: Introduce function to convert META_PREALLOC into META_PERTRANS 2018-03-31 01:41:14 +02:00
qgroup.h btrfs: qgroup: Introduce function to convert META_PREALLOC into META_PERTRANS 2018-03-31 01:41:14 +02:00
raid56.c Btrfs: replace: cache rbio when rebuild data on missing device 2018-03-31 01:41:12 +02:00
raid56.h btrfs: take an fs_info directly when the root is not used otherwise 2016-12-06 16:06:59 +01:00
rcu-string.h
reada.c btrfs: remove unused member err from reada_extent 2017-06-19 18:25:59 +02:00
ref-verify.c btrfs: ref-verify: Remove unused parameter from walk_up_tree() to kill warning 2018-01-22 16:08:13 +01:00
ref-verify.h Btrfs: add a extent ref verify tool 2017-10-30 12:28:00 +01:00
relocation.c btrfs: qgroup: Use separate meta reservation type for delalloc 2018-03-31 01:41:14 +02:00
root-tree.c btrfs: Cleanup existing name_len checks 2018-01-22 16:08:12 +01:00
scrub.c btrfs: Remove unused length var from scrub_handle_errored_block 2018-03-31 01:26:57 +02:00
send.c Btrfs: send: fix typo in TLV_PUT 2018-03-26 15:09:42 +02:00
send.h btrfs: fix send ioctl on 32bit with 64bit kernel 2017-10-30 12:27:59 +01:00
struct-funcs.c btrfs: struct-funcs, constify readers 2017-08-16 14:19:53 +02:00
super.c btrfs: sort and group mount option definitions 2018-03-31 01:26:52 +02:00
sysfs.c btrfs: defer adding raid type kobject until after chunk relocation 2018-03-31 01:41:12 +02:00
sysfs.h Merge branch 'for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux 2017-11-14 13:35:29 -08:00
transaction.c btrfs: qgroup: Split meta rsv type into meta_prealloc and meta_pertrans 2018-03-31 01:41:14 +02:00
transaction.h btrfs: Remove code referencing unused TRANS_USERSPACE 2018-03-31 01:26:51 +02:00
tree-checker.c btrfs: add more __cold annotations 2018-03-26 15:09:39 +02:00
tree-checker.h btrfs: tree-checker: Replace root parameter with fs_info 2018-03-26 15:09:38 +02:00
tree-defrag.c btrfs: add define for oldest generation 2018-03-31 01:26:50 +02:00
tree-log.c btrfs: Remove root argument from btrfs_log_dentry_safe 2018-03-26 15:09:42 +02:00
tree-log.h btrfs: Remove root argument from btrfs_log_dentry_safe 2018-03-26 15:09:42 +02:00
ulist.c btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
ulist.h btrfs: ulist: rename ulist_fini to ulist_release 2017-02-17 12:03:50 +01:00
uuid-tree.c btrfs: add define for oldest generation 2018-03-31 01:26:50 +02:00
volumes.c btrfs: defer adding raid type kobject until after chunk relocation 2018-03-31 01:41:12 +02:00
volumes.h btrfs: rename btrfs_close_extra_device to btrfs_free_extra_devids 2018-03-26 15:09:42 +02:00
xattr.c btrfs: adjust return type of btrfs_getxattr 2018-03-26 15:09:41 +02:00
xattr.h btrfs: move btrfs_listxattr prototype to xattr.h 2018-03-26 15:09:41 +02:00
zlib.c btrfs: allow to set compression level for zlib 2017-11-01 20:45:29 +01:00
zstd.c btrfs: move some zstd work data from stack to workspace 2018-01-22 16:08:14 +01:00