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authorOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>2006-01-08 04:02:13 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 23:13:47 -0500
commit05eb0b51fb46430050d5873458612f53e0234f2e (patch)
tree88b9398079f53f29dff7533fb27487ae725983b1 /Documentation/sx.txt
parent268fc16e343b4f8e249468747db2e658da46a814 (diff)
[PATCH] fat: support a truncate() for expanding size (generic_cont_expand)
This patch changes generic_cont_expand(), in order to share the code with fatfs. - Use vmtruncate() if ->prepare_write() returns a error. Even if ->prepare_write() returns an error, it may already have added some blocks. So, this truncates blocks outside of ->i_size by vmtruncate(). - Add generic_cont_expand_simple(). The generic_cont_expand_simple() assumes that ->prepare_write() can handle the block boundary. With this, we don't need to care the extra byte. And for expanding a file size by truncate(), fatfs uses the added generic_cont_expand_simple(). Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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