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Filipe Manana
a022d3128a
This tests that we can not clone an inline extent into a non-zero file offset. Inline extents at non-zero offsets is something btrfs is not prepared for and results in all sorts of corruption and crashes on future IO operations, such as the following BUG_ON() triggered by the last write operation done by this test: [152154.035903] ------------[ cut here ]------------ [152154.036424] kernel BUG at mm/page-writeback.c:2286! [152154.036424] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC (...) [152154.036424] RIP: 0010:[<ffffffff8111a9d5>] [<ffffffff8111a9d5>] clear_page_dirty_for_io+0x1e/0x90 (...) [152154.036424] Call Trace: [152154.036424] [<ffffffffa04e97c1>] lock_and_cleanup_extent_if_need+0x147/0x18d [btrfs] [152154.036424] [<ffffffffa04ea82c>] __btrfs_buffered_write+0x245/0x4c8 [btrfs] [152154.036424] [<ffffffffa04ed14b>] ? btrfs_file_write_iter+0x150/0x3e0 [btrfs] [152154.036424] [<ffffffffa04ed15a>] ? btrfs_file_write_iter+0x15f/0x3e0 [btrfs] [152154.036424] [<ffffffffa04ed2c7>] btrfs_file_write_iter+0x2cc/0x3e0 [btrfs] [152154.036424] [<ffffffff81165a4a>] __vfs_write+0x7c/0xa5 [152154.036424] [<ffffffff81165f89>] vfs_write+0xa0/0xe4 [152154.036424] [<ffffffff81166855>] SyS_pwrite64+0x64/0x82 [152154.036424] [<ffffffff81465197>] system_call_fastpath+0x12/0x6f (...) [152154.242621] ---[ end trace e3d3376b23a57041 ]--- This issue is addressed by the following linux kernel patch for btrfs: "Btrfs: fix file corruption after cloning inline extents". Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
13 lines
537 B
Plaintext
13 lines
537 B
Plaintext
QA output created by 096
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wrote 4096/4096 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 2048/2048 bytes at offset 4096
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 4096/4096 bytes at offset 8192
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 2048/2048 bytes at offset 0
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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clone failed: Operation not supported
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wrote 2048/2048 bytes at offset 6144
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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