mirror of
https://github.com/linux-apfs/apfstests.git
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Filipe Manana
a7fdd2e1b1
Test several scenarios for RWF_NOWAIT writes, to verify we don't regress
on btrfs specific behaviour (snapshots, cow files, reflinks, holes,
prealloc extent beyond eof).
We had some bugs in the past related to RWF_NOWAIT writes not failing on
btrfs when they should or failing when they shouldn't, these were fixed by
the following kernel commits:
4b1946284dd6 ("btrfs: fix failure of RWF_NOWAIT write into prealloc extent beyond eof")
260a63395f90 ("btrfs: fix RWF_NOWAIT write not failling when we need to cow")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
71 lines
2.3 KiB
Plaintext
71 lines
2.3 KiB
Plaintext
QA output created by 226
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Testing write against COW file
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wrote 131072/131072 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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pwrite: Resource temporarily unavailable
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File data after write attempt:
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0000000 ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab
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*
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0131072
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Testing write against extent shared across snapshots
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wrote 65536/65536 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 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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Create a snapshot of 'SCRATCH_MNT' in 'SCRATCH_MNT/snap'
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wrote 65536/65536 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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pwrite: Resource temporarily unavailable
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File data after write attempt:
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0000000 ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab
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*
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0065536 cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd
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*
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0131072
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Testing write against shared extent through reflink
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wrote 65536/65536 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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linked 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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pwrite: Resource temporarily unavailable
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File data after write attempt:
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0000000 ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab
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*
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0065536 cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd
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*
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0131072
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Testing write against prealloc extent at eof
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wrote 65536/65536 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 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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File after write:
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0000000 ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab ab
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*
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0065536 cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd
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*
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0131072
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Testing writes against ranges with holes
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wrote 65536/65536 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 65536/65536 bytes at offset 65536
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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wrote 65536/65536 bytes at offset 196608
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XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
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pwrite: Resource temporarily unavailable
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pwrite: Resource temporarily unavailable
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File data after write attempt:
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0000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0065536 cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd cd
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*
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0131072 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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*
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0196608 ef ef ef ef ef ef ef ef ef ef ef ef ef ef ef ef
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*
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0262144
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