f2fs: do not preallocate blocks which has wrong buffer

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Sheng Yong reports needless preallocation if write(small_buffer, large_size)
is called.

In that case, f2fs preallocates large_size, but vfs returns early due to
small_buffer size. Let's detect it before preallocation phase in f2fs.

Reported-by: Sheng Yong <shengyong1@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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This commit is contained in:

Jaegeuk Kim 2017-01-13 13:12:29 -08:00

parent dcc9165dbf

commit dc91de78e5

3 changed files with 13 additions and 2 deletions

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6

fs/f2fs/data.c

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1

fs/f2fs/f2fs.h

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8

fs/f2fs/file.c

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