f2fs: compress: fix to avoid redundant compress extension

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With below script, redundant compress extension will be parsed and added
by parse_options(), because parse_options() doesn't check whether the
extension is existed or not, fix it.

1. mount -t f2fs -o compress_extension=so /dev/vdb /mnt/f2fs
2. mount -t f2fs -o remount,compress_extension=so /mnt/f2fs
3. mount|grep f2fs

/dev/vdb on /mnt/f2fs type f2fs (...,compress_extension=so,compress_extension=so,...)

Fixes: 4c8ff7095b ("f2fs: support data compression")
Fixes: 151b1982be ("f2fs: compress: add nocompress extensions support")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

...

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Chao Yu 2023-08-28 22:04:17 +08:00 • committed by Jaegeuk Kim

parent 2aaea533bf

commit 7e1b150fec

1 changed files with 33 additions and 0 deletions

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fs/f2fs/super.c

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