btrfs: allow setting zlib compression level via :9

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This is bikeshedding, but it seems people are drastically more likely to
understand "zlib:9" as compression level rather than an algorithm
version compared to "zlib9".

Based on feedback on the mailinglist, the ":9" will be the only accepted
syntax. The level must be a single digit. Unrecognized format will
result to the default, for forward compatibility in a similar way the
compression algorithm specifier was relaxed in commit
a7164fa4e0 ("btrfs: prepare for extensions in compression
options").

Signed-off-by: Adam Borowski <kilobyte@angband.pl>
Reviewed-by: David Sterba <dsterba@suse.com>
[ tighten the accepted format ]
Signed-off-by: David Sterba <dsterba@suse.com>

...

This commit is contained in:

Adam Borowski 2017-09-15 17:36:58 +02:00 • committed by David Sterba

parent f51d2b5912

commit fa4d885a48

2 changed files with 4 additions and 3 deletions

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5

fs/btrfs/compression.c

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2

fs/btrfs/super.c

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