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2018-03-26btrfs: Remove custom crc32c init codeNikolay Borisov16-127/+35
The custom crc32 init code was introduced in 14a958e678cd ("Btrfs: fix btrfs boot when compiled as built-in") to enable using btrfs as a built-in. However, later as pointed out by 60efa5eb2e88 ("Btrfs: use late_initcall instead of module_init") this wasn't enough and finally btrfs was switched to late_initcall which comes after the generic crc32c implementation is initiliased. The latter commit superseeded the former. Now that we don't have to maintain our own code let's just remove it and switch to using the generic implementation. Despite touching a lot of files the patch is really simple. Here is the gist of the changes: 1. Select LIBCRC32C rather than the low-level modules. 2. s/btrfs_crc32c/crc32c/g 3. replace hash.h with linux/crc32c.h 4. Move the btrfs namehash funcs to ctree.h and change the tree accordingly. I've tested this with btrfs being both a module and a built-in and xfstest doesn't complain. Does seem to fix the longstanding problem of not automatically selectiong the crc32c module when btrfs is used. Possibly there is a workaround in dracut. The modinfo confirms that now all the module dependencies are there: before: depends: zstd_compress,zstd_decompress,raid6_pq,xor,zlib_deflate after: depends: libcrc32c,zstd_compress,zstd_decompress,raid6_pq,xor,zlib_deflate Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> [ add more info to changelog from mails ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Refactor __get_raid_index() to btrfs_bg_flags_to_raid_index()Qu Wenruo4-34/+33
Function __get_raid_index() is used to convert block group flags into raid index, which can be used to get various info directly from btrfs_raid_array[]. Refactor this function a little: 1) Rename to btrfs_bg_flags_to_raid_index() Double underline prefix is normally for internal functions, while the function is used by both extent-tree and volumes. Although the name is a little longer, but it should explain its usage quite well. 2) Move it to volumes.h and make it static inline Just several if-else branches, really no need to define it as a normal function. This also makes later code re-use between kernel and btrfs-progs easier. 3) Remove function get_block_group_index() Really no need to do such a simple thing as an exported function. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: tree-checker: Replace root parameter with fs_infoQu Wenruo3-78/+82
When inspecting the error message with real corruption, the "root=%llu" always shows "1" (root tree), instead of the correct owner. The problem is that we are getting @root from page->mapping->host, which points the same btree inode, so we will always get the same root. This makes the root owner output meaningless, and harder to port tree-checker to btrfs-progs. So get rid of the false and meaningless @root parameter and replace it with @fs_info. To get the owner, we can only rely on btrfs_header_owner() now. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26Btrfs: add tracepoint for em's EEXIST caseLiu Bo1-0/+3
This is adding a tracepoint 'btrfs_handle_em_exist' to help debug the subtle bugs around merge_extent_mapping. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Move qgroup rescan on quota enable to btrfs_quota_enableNikolay Borisov2-26/+10
Currently btrfs_run_qgroups is doing a bit too much. Not only is it responsible for synchronizing in-memory state of qgroups to disk but it also contains code to trigger the initial qgroup rescan when quota is enabled initially. This condition is detected by checking that BTRFS_FS_QUOTA_ENABLED is not set and BTRFS_FS_QUOTA_ENABLING is set. Nothing really requires from the code to be structured (and scattered) the way it is so let's streamline things. First move the quota rescan code into btrfs_quota_enable, where its invocation is closer to the use. This also makes the FS_QUOTA_ENABLING flag redundant so let's remove it as well. This has been tested with a full xfstest run with qgroups enabled on the scratch device of every xfstest and no regressions were observed. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: use reada direction enum instead of constant value in ↵Gu JinXiang1-1/+1
load_free_space_tree load_free_space_tree calls either function load_free_space_bitmaps or load_free_space_extents. And either of those two will lead to call btrfs_next_item. So in function load_free_space_tree, use READA_FORWARD to read forward ahead. This also changes the value from READA_BACK to READA_FORWARD, since according to the logic, it should reada_for_search forward, not backward. Signed-off-by: Gu JinXiang <gujx@cn.fujitsu.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> [ update changelog ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: use reada direction enum instead of constant value in ↵Gu Jinxiang1-1/+1
populate_free_space_tree populate_free_space_tree calls function btrfs_search_slot_for_read with parameter int find_higher = 1, it means that, if no exact match is found, then use the next higher item. So in function populate_free_space_tree, use READA_FORWARD to read forward ahead. This also changes the value from READA_BACK to READA_FORWARD, since according to the logic, it should reada_for_search forward, not backward. Signed-off-by: Gu JinXiang <gujx@cn.fujitsu.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> [ update changelog ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove btrfs_inode::delayed_iput_countNikolay Borisov2-15/+13
delayed_iput_count wa supposed to be used to implement, well, delayed iput. The idea is that we keep accumulating the number of iputs we do until eventually the inode is deleted. Turns out we never really switched the delayed_iput_count from 0 to 1, hence all conditional code relying on the value of that member being different than 0 was never executed. This, as it turns out, didn't cause any problem due to the simple fact that the generic inode's i_count member was always used to count the number of iputs. So let's just remove the unused member and all unused code. This patch essentially provides no functional changes. While at it, also add proper documentation for btrfs_add_delayed_iput Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> [ reformat comment ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: volumes: Cleanup stripe size calculationQu Wenruo1-7/+6
Cleanup the following things: 1) open coded SZ_16M round up 2) use min() to replace open-coded size comparison 3) code style Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Gu Jinxiang <gujx@cn.fujitsu.com> [ reformat comment ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Streamline btrfs_delalloc_reserve_metadata initial operationsNikolay Borisov1-6/+6
The behavior of btrfs_delalloc_reserve_metadata depends on whether the inode we are allocating for is the freespace inode or not. As it stands if we are the free node we set 'flush' and 'delalloc_lock' variable to certain values. Subsequently we check the values of those vars and act accordingly. Instead, simplify things by having 1 if which checks whether we are the freespace inode or not and do any specific operation in either branches of that if. This makes the code a bit easier to understand, as an added bonus it also shrinks the compiled size: add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-17 (-17) Function old new delta btrfs_delalloc_reserve_metadata 1876 1859 -17 Total: Before=85966, After=85949, chg -0.02% No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Edmund Nadolski <enadolski@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: insert newly opened device to the end of the listAnand Jain1-1/+1
Add opened device to the tail of dev_alloc_list instead of head, so that it maintains the same order as dev_list. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: keep device list sortedAnand Jain1-0/+16
By maintaining the device list sorted lets us reproduce the problems related to missing chunk in the degraded mode much more consistent. So fix this by sorting the devices by devid within the kernel. So that we know which device is assigned to the struct fs_info::latest_bdev when all the devices are having and same SB generation. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> [ update changelog ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26Btrfs: do not check inode's runtime flags under root->orphan_lockLiu Bo1-9/+12
It's not necessary to hold ->orphan_lock when checking inode's runtime flags. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Use schedule_timeout_interruptibleNikolay Borisov1-3/+1
Instead of manually fiddling with the state of the task (RUNNING->INTERRUPTIBLE->RUNNING) again just use schedule_timeout_interruptible which adjusts the task state as needed. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Josef Bacik <jbacik@fb.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Move error handling of btrfs_start_dirty_block_groups closer to call siteNikolay Borisov1-5/+6
Even though btrfs_start_dirty_block_groups is fairly in the beginning of btrfs_commit_transaction outside of the critical section defined by the transaction states it can only be run by a single comitter. In other words it defines its own critical section thanks to the BTRFS_TRANS_DIRTY_BG run flag and ro_block_group_mutex. However, its error handling is outside of this critical section which is a bit counter-intuitive. So move the error handling righ after the function is executed and let the sole runner of dirty block groups handle the return value. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: not a disk error if the bio_add_page failsAnand Jain1-7/+4
bio_add_page() can fail for logical reasons as from the bio_add_page() comments: /* * This will only fail if either bio->bi_vcnt == bio->bi_max_vecs or * it's a cloned bio. */ Here we have just allocated the bio, so both of those failures can't occur. So drop the check. We can also drop the error stats for write error. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Add chunk allocation ENOSPC debug message for enospc_debug mount optionQu Wenruo1-2/+17
Enospc_debug makes extent allocator print more debug messages, however for chunk allocation, there is no debug message for enospc_debug at all. This patch will add message for the following parts of chunk allocator: 1) No rw device at all Quite rare, but at least output one message for this case. 2) Not enough space for some device This debug message is quite handy for unbalanced disks with stripe based profiles (RAID0/10/5/6). 3) Not enough free devices This debug message should tell us if current chunk allocator is working correctly under minimal device requirements. Although in most cases, we will hit other ENOSPC before we even hit a chunk allocator ENOSPC, but such debug info won't help. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: use ASSERT to report logical error in cow_file_range()Anand Jain1-2/+1
Use ASSERT to report logical error in cow_file_range(), also move it a bit closer to when the num_bytes is derived. The extent start could be (u64)-1 in some cases, the assert should catch that we do not accidentally pass it to cow_file_range. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: cow_file_range() num_bytes and disk_num_bytes are sameAnand Jain1-10/+6
This patch deletes local variable disk_num_bytes as its value is same as num_bytes in the function cow_file_range(). Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: remove unused function btrfs_async_submit_limit()Anand Jain2-9/+0
Commit [1] removed the need to use btrfs_async_submit_limit(), so delete it. [1] commit 736cd52e0c720103f52ab9da47b6cc3af6b083f6 Btrfs: remove nr_async_submits and async_submit_draining Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: remove unused hardirq.hYang Shi1-1/+0
Preempt counter APIs have been split out, currently, hardirq.h just includes irq_enter/exit APIs which are not used by btrfs at all. So, remove the unused hardirq.h. Signed-off-by: Yang Shi <yang.s@alibaba-inc.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Add enospc_debug printing in metadata_reserve_bytesNikolay Borisov1-1/+6
Currently when enospc_debug mount option is turned on we do not print any debug info in case metadata reservation failures happen. Fix this by adding the necessary hook in reserve_metadata_bytes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Document consistency of transaction->io_bgs listNikolay Borisov3-2/+27
The reason why io_bgs can be modified without holding any lock is non-obvious. Document it and reference that documentation from the respective call sites. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove invalid null checks from btrfs_cleanup_dirty_bgsNikolay Borisov1-9/+0
list_first_entry is essentially a wrapper over cotnainer_of. The latter can never return null even if it's working on inconsistent list since it will either crash or return some offset in the wrong struct. Additionally, for the dirty_bgs list the iteration is done under dirty_bgs_lock which ensures consistency of the list. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Liu Bo <bo.li.liu@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: log, when replace, is canceled by the userAnand Jain1-0/+8
For debugging or administration purposes, we would want to know if and when the user cancels the replace, to complement the existing messages when dev-replace starts or finishes. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> [ update changelog, fold fix for RCU warning from Nikolay ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: fix null pointer deref when target device is missingAnand Jain1-1/+1
The replace target device can be missing when mounted with -o degraded, but we wont allocate a missing btrfs_device to it. So check the device before accessing. BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0 IP: btrfs_destroy_dev_replace_tgtdev+0x43/0xf0 [btrfs] Call Trace: btrfs_dev_replace_cancel+0x15f/0x180 [btrfs] btrfs_ioctl+0x2216/0x2590 [btrfs] do_vfs_ioctl+0x625/0x650 SyS_ioctl+0x4e/0x80 do_syscall_64+0x5d/0x160 entry_SYSCALL64_slow_path+0x25/0x25 This patch has been moved in front of patch "btrfs: log, when replace, is canceled by the user" that could reproduce the crash if the system reboots inside btrfs_dev_replace_start before the btrfs_dev_replace_finishing call. $ mkfs /dev/sda $ mount /dev/sda mnt $ btrfs replace start /dev/sda /dev/sdb <insert reboot> $ mount po degraded /dev/sdb mnt <crash> Signed-off-by: Anand Jain <anand.jain@oracle.com> [ added reproducer description from mail ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: add a comment to mark the deprecated mount optionAnand Jain1-2/+2
The options alloc_start and subvolrootid are deprecated, comment them in the tokens list. And leave them as it is. No functional changes. Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: manage commit mount option as %uAnand Jain2-17/+11
As the commit mount option is unsigned so manage it as %u for token verifications, instead of %d. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: manage check_int_print_mask mount option as %uAnand Jain1-11/+5
As check_int_print_mask mount option is unsigned so manage it as %u for token verifications, instead of %d. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: manage metadata_ratio mount option as %uAnand Jain1-12/+6
As metadata_ratio mount option is unsinged so manage it as %u for token verifications, instead of %d. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: manage thread_pool mount option as %uAnand Jain3-10/+9
The mount option thread_pool is always unsigned. Manage it that way all around. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: extent_buffer_uptodate() make it static and inlineAnand Jain2-6/+5
extent_buffer_uptodate() is a trivial wrapper around test_bit() and nothing else. So make it static and inline, save on code space and call indirection. Before: text data bss dec hex filename 1131257 82898 18992 1233147 12d0fb fs/btrfs/btrfs.ko After: text data bss dec hex filename 1131090 82898 18992 1232980 12d054 fs/btrfs/btrfs.ko Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument of btrfs_write_and_wait_transactionNikolay Borisov1-4/+4
We already pass btrfs_trans_handle which contains a reference to the fs_info so use that. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument from btrfs_update_commit_device_bytes_usedNikolay Borisov3-7/+6
We already pass the btrfs_transaction which references fs_info so no need to pass the later as an argument. Also use the opportunity to shorten transaction->trans. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument from ↵Nikolay Borisov1-5/+5
create_pending_snapshots/create_pending_snapshot We already pass the trans handle which has a reference to fs_info to create_pending_snapshot so we can refer to it directly. Doing this obviates the need to pass the fs_info to create_pending_snapshots as well. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument from switch_commit_rootsNikolay Borisov1-4/+4
We already have the fs_info from the passed transaction so use it directly. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove root argument of cleanup_transactionNikolay Borisov1-5/+4
The only thing the passed root is used for is: 1. get a reference to the fs_info and to 2. call trace_btrfs_transaction_commit. We can achieve 1) by simply referring to the fs_info from passed trans object. As far as 2) is concerned cleanup_transaction is called from only one place and the 'root' argument passed is the one from the trans handle. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Don't pass fs_info to commit_cowonly_rootsNikolay Borisov1-4/+4
We already pass a transaction handle which refrences the fs_info so we can grab it from there. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Don't pass fs_info to commit_fs_rootsNikolay Borisov1-4/+4
We already pass the transaction handle which has a reference to the fs_info. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Don't pass fs_info to btrfs_run_delayed_items/_nrNikolay Borisov5-21/+13
We already pass the transaction which has a reference to the fs_info, so use that. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Don't pass fs_info to __btrfs_run_delayed_itemsNikolay Borisov1-4/+4
We already pass the transaction handle, which contains a refrence to the fs_info so grab it from there. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Don't pass fs_info arg to btrfs_start_dirty_block_groupsNikolay Borisov3-5/+4
It can be referenced from the passed transaction so no point in passing it as a function argument. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument from btrfs_create_pending_block_groupsNikolay Borisov3-10/+9
It can be referenced from the passed transaciton so no point in passing it as function argument. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Remove fs_info argument from btrfs_trans_release_metadataNikolay Borisov1-6/+8
All current callers of this function just get a reference to the trans->fs_info member and pass it as the second argument. Collapse this into the function itself. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Open code btrfs_write_and_wait_marked_extentsNikolay Borisov1-21/+14
btrfs_write_and_wait_transaction is essentially a wrapper of btrfs_write_and_wait_marked_extents with the addition of calling clear_btree_io_tree. Having the code split doesn't really bring any benefit. Open code the later into the former and add proper documentation header. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> [ reformat comment ] Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: Make btrfs_trans_release_metadata private to transaction.cNikolay Borisov3-20/+19
This function is only ever used in __btrfs_end_transaction and btrfs_commit_transaction so there is no need to export it via header. Let's move it closer to where it's used, make it static and remove it from the header. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: open code btrfs_init_dev_replace_tgtdev_for_resume()Anand Jain3-17/+8
btrfs_init_dev_replace_tgtdev_for_resume() initializes replace target device in a few simple steps, so do it at the parent function. Moreover, there isn't any other caller so just open code it. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: btrfs_dev_replace_cancel() can return intAnand Jain2-3/+3
Current u64 return from btrfs_dev_replace_cancel() was probably done to match the btrfs_ioctl_dev_replace_args::result. However as our actual return value fits in int, and it further gets typecast to u64, so just return int. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: rename __btrfs_dev_replace_cancel()Anand Jain3-3/+3
Remove __ which is for the special functions. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26btrfs: open code btrfs_dev_replace_cancel()Anand Jain3-12/+4
btrfs_dev_replace_cancel() calls __btrfs_dev_replace_cancel() for the actual cancel so just open code it. Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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