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f2fs: avoid fsync() failure caused by EAGAIN in writepage()

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[ Upstream commit 5b19d284f5 ]

pageout() in MM traslates EAGAIN, so calls handle_write_error()
 -> mapping_set_error() -> set_bit(AS_EIO, ...).
 file_write_and_wait_range() will see EIO error, which is critical
 to return value of fsync() followed by atomic_write failure to user.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jaegeuk Kim 2018-05-03 23:26:02 -07:00 committed by Greg Kroah-Hartman
parent 15239633dc
commit 4bbf1ce3a1
1 changed files with 7 additions and 1 deletions
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8
fs/f2fs/data.c
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@ -1601,7 +1601,13 @@ out:
redirty_out:
redirty_page_for_writepage(wbc, page);
if (!err)
/*
* pageout() in MM traslates EAGAIN, so calls handle_write_error()
* -> mapping_set_error() -> set_bit(AS_EIO, ...).
* file_write_and_wait_range() will see EIO error, which is critical
* to return value of fsync() followed by atomic_write failure to user.
*/
if (!err || wbc->for_reclaim)
return AOP_WRITEPAGE_ACTIVATE;
unlock_page(page);
return err;