- 17 12月, 2018 11 次提交
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由 Nikolay Borisov 提交于
If epd::extent_locked is set then writepage_delalloc terminates. Make this a bit more apparent in the caller by simply bubbling the check up. This enables to remove epd as an argument to writepage_delalloc in a future patch. No functional change. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
The loop construct in free_extent_buffer was added in 242e18c7 ("Btrfs: reduce lock contention on extent buffer locks") as means of reducing the times the eb lock is taken, the non-last ref count is decremented and lock is released. As the special handling of UNMAPPED extent buffers was removed now there is only one decrement op which is happening for EXTENT_BUFFER_UNMAPPED case. This commit modifies the loop condition so that in case of UNMAPPED buffers the eb's lock is taken only if we are 100% sure the eb is going to be freed by the current executor of the code. Additionally, remove superfluous ref count ops in btrfs test. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Now that the whole of btrfs code has been audited for eb reference count management it's time to remove the hunk in free_extent_buffer that essentially considered the condition "eb->ref == 2 && EXTENT_BUFFER_DUMMY" to equal "eb->ref = 1". Also remove the last location which takes an extra reference count in alloc_test_extent_buffer. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This is the counterpart to merge_extent_hook, similarly, it's used only for data/freespace inodes so let's remove it, rename it and call it directly where necessary. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This callback is used only for data and free space inodes. Such inodes are guaranteed to have their extent_io_tree::private_data set to the inode struct. Exploit this fact to directly call the function. Also give it a more descriptive name. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This is the counterpart to ex-set_bit_hook (now btrfs_set_delalloc_extent), similar to what was done before remove clear_bit_hook and rename the function. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This callback is used to properly account delalloc extents for data inodes (ordinary file inodes and freespace v1 inodes). Those can be easily identified since they have their extent_io trees ->private_data member point to the inode. Let's exploit this fact to remove the needless indirection through extent_io_hooks and directly call the function. Also give the function a name which reflects its purpose - btrfs_set_delalloc_extent. This patch also modified test_find_delalloc so that the extent_io_tree used for testing doesn't have its ->private_data set which would have caused a crash in btrfs_set_delalloc_extent due to the btrfs_inode->root member not being initialised. The old version of the code also didn't call set_bit_hook since the extent_io ops weren't set for the inode. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This callback was only used in debug builds by btrfs_leak_debug_check. A better approach is to move its implementation in btrfs_leak_debug_check and ensure the latter is only executed for extent tree which have ->private_data set i.e. relate to a data node and not the btree one. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This callback is ony ever called for data page writeout so there is no need to actually abstract it via extent_io_ops. Lets just export it, remove the definition of the callback and call it directly in the functions that invoke the callback. Also rename the function to btrfs_writepage_endio_finish_ordered since what it really does is account finished io in the ordered extent data structures. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This hook is called only from __extent_writepage_io which is already called only from the data page writeout path. So there is no need to make an indirect call via extent_io_ops. This patch just removes the callback definition, exports the callback function and calls it directly at the only call site. Also give the function a more descriptive name. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This callback is called only from writepage_delalloc which in turn is guaranteed to be called from the data page writeout path. In the end there is no reason to have the call to this function to be indrected via the extent_io_ops structure. This patch removes the callback definition, exports the function and calls it directly. No functional changes. Reviewed-by: NJosef Bacik <josef@toxicpanda.com> Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ rename to btrfs_run_delalloc_range ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 21 10月, 2018 2 次提交
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由 Matthew Wilcox 提交于
Signed-off-by: NMatthew Wilcox <willy@infradead.org> Acked-by: NDavid Sterba <dsterba@suse.com>
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由 Matthew Wilcox 提交于
Removes sparse warnings. Signed-off-by: NMatthew Wilcox <willy@infradead.org>
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- 15 10月, 2018 4 次提交
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由 David Sterba 提交于
The helper find_lock_delalloc_range is now conditionally built static, dpending on whether the self-tests are enabled or not. There's a macro that is supposed to hide the export, used only once. To discourage further use, drop it an add a public wrapper for the helper needed by tests. Reviewed-by: NOmar Sandoval <osandov@fb.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
As long as @eb is marked with EXTENT_BUFFER_DIRTY, all of its pages are dirty, so no need to set pages dirty again. Ftrace showed that the loop took 10us on my dev box, so removing this can save us at least 10us if eb is already dirty and otherwise avoid a potentially expensive calls to set_page_dirty. Signed-off-by: NLiu Bo <bo.liu@linux.alibaba.com> Reviewed-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
Just in case that someone breaks the rule that pages are dirty as long as eb is dirty. The next patch will dirty the pages conditionally. Signed-off-by: NLiu Bo <bo.liu@linux.alibaba.com> Reviewed-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Liu Bo 提交于
As next_state() is already defined to get the next state, use it in find_first_extent_bit. No functional changes. Signed-off-by: NLiu Bo <bo.liu@linux.alibaba.com> Reviewed-by: NQu Wenruo <wqu@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 18 8月, 2018 1 次提交
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由 Jens Axboe 提交于
a_ops->readpages() is only ever used for read-ahead. Ensure that we pass this information down to the block layer. Link: http://lkml.kernel.org/r/20180621010725.17813-4-axboe@kernel.dkSigned-off-by: NJens Axboe <axboe@kernel.dk> Reviewed-by: NAndrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <clm@fb.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 06 8月, 2018 12 次提交
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由 David Sterba 提交于
The data and metadata callback implementation both use the same function. We can remove the call indirection and intermediate helper completely. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The data and metadata callback implementation both use the same function. We can remove the call indirection completely. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
All implementations of the callback are trivial and do the same and there's only one user. Merge everything together. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
EXTENT_BUFFER_DUMMY is an awful name for this flag. Buffers which have this flag set are not in any way dummy. Rather, they are private in the sense that are not mapped and linked to the global buffer tree. This flag has subtle implications to the way free_extent_buffer works for example, as well as controls whether page->mapping->private_lock is held during extent_buffer release. Pages for an unmapped buffer cannot be under io, nor can they be written by a 3rd party so taking the lock is unnecessary. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ EXTENT_BUFFER_UNMAPPED, update changelog ] Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Remove stale comment since there is no longer an eb->eb_lock and document the locking expectation with a lockdep_assert_held statement. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The function used to release one page (and always the first one), but not anymore since a50924e3 ("btrfs: drop constant param from btrfs_release_extent_buffer_page"). Update the name and comment. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
The purpose of the function is to free all the pages comprising an extent buffer. This can be achieved with a simple for loop rather than the slightly more involved 'do {} while' construct. So rewrite the loop using a 'for' construct. Additionally we can never have an extent_buffer that has 0 pages so remove the check for index == 0. No functional changes. The reversed order used to have a meaning in the past where the first page served as a blocking point for several callers. See eg 4f2de97a ("Btrfs: set page->private to the eb"). Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Commit eb14ab8e ("Btrfs: fix page->private races") fixed a genuine race between extent buffer initialisation and btree_releasepage. Unfortunately as the code has evolved the comments weren't changed which made them slightly wrong and they weren't very clear in the fist place. Fix this by (hopefully) rewording them in a more approachable manner. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
Current version of the page unlocking code was added in 727011e0 ("Btrfs: allow metadata blocks larger than the page size") but even in this commit that particular flag was never used per-se. In fact, btrfs only uses PageChecked for data pages to identify pages which have been dirtied but don't have ORDERED bit set. For more information see 247e743c ("Btrfs: Use async helpers to deal with pages that have been improperly dirtied"). However, this doesn't apply to extent buffer pages. The important bit here is that the pages are unlocked AFTER the extent buffer has been properly recorded in the radix tree to avoid races with btree_releasepage. Let's exploit this fact and simplify the page unlocking sequence by unlocking the pages in-order and removing the redundant PageChecked flag setting/clearing. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The helper is trivial and marked as deprecated. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
The loops iterating eb pages use unsigned long, that's an overkill as we know that there are at most 16 pages (64k / 4k), and 4 by default (with nodesize 16k). Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 David Sterba 提交于
Almost all callers pass the start and len as 2 arguments but this is not necessary, all the information is provided by the eb. By reordering the calls to num_extent_pages, we don't need the local variables with start/len. Reviewed-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 19 7月, 2018 1 次提交
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由 Filipe Manana 提交于
When we clone a range into a file we can end up dropping existing extent maps (or trimming them) and replacing them with new ones if the range to be cloned overlaps with a range in the destination inode. When that happens we add the new extent maps to the list of modified extents in the inode's extent map tree, so that a "fast" fsync (the flag BTRFS_INODE_NEEDS_FULL_SYNC not set in the inode) will see the extent maps and log corresponding extent items. However, at the end of range cloning operation we do truncate all the pages in the affected range (in order to ensure future reads will not get stale data). Sometimes this truncation will release the corresponding extent maps besides the pages from the page cache. If this happens, then a "fast" fsync operation will miss logging some extent items, because it relies exclusively on the extent maps being present in the inode's extent tree, leading to data loss/corruption if the fsync ends up using the same transaction used by the clone operation (that transaction was not committed in the meanwhile). An extent map is released through the callback btrfs_invalidatepage(), which gets called by truncate_inode_pages_range(), and it calls __btrfs_releasepage(). The later ends up calling try_release_extent_mapping() which will release the extent map if some conditions are met, like the file size being greater than 16Mb, gfp flags allow blocking and the range not being locked (which is the case during the clone operation) nor being the extent map flagged as pinned (also the case for cloning). The following example, turned into a test for fstests, reproduces the issue: $ mkfs.btrfs -f /dev/sdb $ mount /dev/sdb /mnt $ xfs_io -f -c "pwrite -S 0x18 9000K 6908K" /mnt/foo $ xfs_io -f -c "pwrite -S 0x20 2572K 156K" /mnt/bar $ xfs_io -c "fsync" /mnt/bar # reflink destination offset corresponds to the size of file bar, # 2728Kb minus 4Kb. $ xfs_io -c ""reflink ${SCRATCH_MNT}/foo 0 2724K 15908K" /mnt/bar $ xfs_io -c "fsync" /mnt/bar $ md5sum /mnt/bar 95a95813a8c2abc9aa75a6c2914a077e /mnt/bar <power fail> $ mount /dev/sdb /mnt $ md5sum /mnt/bar 207fd8d0b161be8a84b945f0df8d5f8d /mnt/bar # digest should be 95a95813a8c2abc9aa75a6c2914a077e like before the # power failure In the above example, the destination offset of the clone operation corresponds to the size of the "bar" file minus 4Kb. So during the clone operation, the extent map covering the range from 2572Kb to 2728Kb gets trimmed so that it ends at offset 2724Kb, and a new extent map covering the range from 2724Kb to 11724Kb is created. So at the end of the clone operation when we ask to truncate the pages in the range from 2724Kb to 2724Kb + 15908Kb, the page invalidation callback ends up removing the new extent map (through try_release_extent_mapping()) when the page at offset 2724Kb is passed to that callback. Fix this by setting the bit BTRFS_INODE_NEEDS_FULL_SYNC whenever an extent map is removed at try_release_extent_mapping(), forcing the next fsync to search for modified extents in the fs/subvolume tree instead of relying on the presence of extent maps in memory. This way we can continue doing a "fast" fsync if the destination range of a clone operation does not overlap with an existing range or if any of the criteria necessary to remove an extent map at try_release_extent_mapping() is not met (file size not bigger then 16Mb or gfp flags do not allow blocking). CC: stable@vger.kernel.org # 3.16+ Signed-off-by: NFilipe Manana <fdmanana@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 22 6月, 2018 1 次提交
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由 Filipe Manana 提交于
Commit 9d311e11 ("Btrfs: fiemap: pass correct bytenr when fm_extent_count is zero") introduced a regression where we no longer report 0 as the physical offset for inline extents (and other extents with a special block_start value). This is because it always sets the variable used to report the physical offset ("disko") as em->block_start plus some offset, and em->block_start has the value 18446744073709551614 ((u64) -2) for inline extents. This made the btrfs test 004 (from fstests) often fail, for example, for a file with an inline extent we have the following items in the subvolume tree: item 101 key (418 INODE_ITEM 0) itemoff 11029 itemsize 160 generation 25 transid 38 size 1525 nbytes 1525 block group 0 mode 100666 links 1 uid 0 gid 0 rdev 0 sequence 0 flags 0x2(none) atime 1529342058.461891730 (2018-06-18 18:14:18) ctime 1529342058.461891730 (2018-06-18 18:14:18) mtime 1529342058.461891730 (2018-06-18 18:14:18) otime 1529342055.869892885 (2018-06-18 18:14:15) item 102 key (418 INODE_REF 264) itemoff 11016 itemsize 13 index 25 namelen 3 name: fc7 item 103 key (418 EXTENT_DATA 0) itemoff 9470 itemsize 1546 generation 38 type 0 (inline) inline extent data size 1525 ram_bytes 1525 compression 0 (none) Then when test 004 invoked fiemap against the file it got a non-zero physical offset: $ filefrag -v /mnt/p0/d4/d7/fc7 Filesystem type is: 9123683e File size of /mnt/p0/d4/d7/fc7 is 1525 (1 block of 4096 bytes) ext: logical_offset: physical_offset: length: expected: flags: 0: 0.. 4095: 18446744073709551614.. 4093: 4096: last,not_aligned,inline,eof /mnt/p0/d4/d7/fc7: 1 extent found This resulted in the test failing like this: btrfs/004 49s ... [failed, exit status 1]- output mismatch (see /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad) --- tests/btrfs/004.out 2016-08-23 10:17:35.027012095 +0100 +++ /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad 2018-06-18 18:15:02.385872155 +0100 @@ -1,3 +1,10 @@ QA output created by 004 *** test backref walking -*** done +./tests/btrfs/004: line 227: [: 7.55578637259143e+22: integer expression expected +ERROR: 7.55578637259143e+22 is not a valid numeric value. +unexpected output from + /home/fdmanana/git/hub/btrfs-progs/btrfs inspect-internal logical-resolve -s 65536 -P 7.55578637259143e+22 /home/fdmanana/btrfs-tests/scratch_1 ... (Run 'diff -u tests/btrfs/004.out /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad' to see the entire diff) Ran: btrfs/004 The large number in scientific notation reported as an invalid numeric value is the result from the filter passed to perl which multiplies the physical offset by the block size reported by fiemap. So fix this by ensuring the physical offset is always set to 0 when we are processing an extent with a special block_start value. Fixes: 9d311e11 ("Btrfs: fiemap: pass correct bytenr when fm_extent_count is zero") Signed-off-by: NFilipe Manana <fdmanana@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 07 6月, 2018 1 次提交
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由 Robbie Ko 提交于
[BUG] fm_mapped_extents is not correct when fm_extent_count is 0 Like: # mount /dev/vdb5 /mnt/btrfs # dd if=/dev/zero bs=16K count=4 oflag=dsync of=/mnt/btrfs/file # xfs_io -c "fiemap -v" /mnt/btrfs/file /mnt/btrfs/file: EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS 0: [0..127]: 25088..25215 128 0x1 When user space wants to get the number of file extents, set fm_extent_count to 0 to run fiemap and then read fm_mapped_extents. In the above example, fiemap will return with fm_mapped_extents set to 4, but it should be 1 since there's only one entry in the output. [REASON] The problem seems to be that disko is only set if fieinfo->fi_extents_max is set. And this member is initialized, in the generic ioctl_fiemap function, to the value of used-passed fm_extent_count. So when the user passes 0 then fi_extent_max is also set to zero and this causes btrfs to not initialize disko at all. Eventually this leads emit_fiemap_extent being called with a bogus 'phys' argument preventing proper fiemap entries merging. [FIX] Move the disko initialization earlier in extent_fiemap making it independent of user-passed arguments, allowing emit_fiemap_extent to properly handle consecutive extent entries. Signed-off-by: NRobbie Ko <robbieko@synology.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 31 5月, 2018 1 次提交
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由 Kent Overstreet 提交于
Convert btrfs to embedded bio sets. Acked-by: NChris Mason <clm@fb.com> Signed-off-by: NKent Overstreet <kent.overstreet@gmail.com> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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- 29 5月, 2018 5 次提交
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由 Nikolay Borisov 提交于
It can be directly referenced from the passed address_space so do that. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This function is called only from btrfs_readpage and is already passed the mapping. Simplify its signature by moving the code obtaining reference to the extent tree in the function. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
It's not used in the function so just remove it. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Nikolay Borisov 提交于
This function already gets the page from which the two extent trees are referenced. Simplify its signature by moving the code getting the trees inside the function. No functional changes. Signed-off-by: NNikolay Borisov <nborisov@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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由 Howard McLauchlan 提交于
le_bitmap_set() is only used by free-space-tree, so move it there and make it static. le_bitmap_clear() is not used, so remove it. Signed-off-by: NHoward McLauchlan <hmclauchlan@fb.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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- 12 4月, 2018 1 次提交
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由 David Sterba 提交于
Remove GPL boilerplate text (long, short, one-line) and keep the rest, ie. personal, company or original source copyright statements. Add the SPDX header. Signed-off-by: NDavid Sterba <dsterba@suse.com>
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