Subject: [to-be-updated] fat-fallback-to-buffered-write-in-case-of-fallocatded-region-on-direct-io.patch removed from -mm tree
To: namjae.jeon@xxxxxxxxxxx,a.sahrawat@xxxxxxxxxxx,hirofumi@xxxxxxxxxxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Tue, 07 Jan 2014 15:08:01 -0800
The patch titled
Subject: fat: fallback to buffered write in case of fallocatded region on direct IO
has been removed from the -mm tree. Its filename was
fat-fallback-to-buffered-write-in-case-of-fallocatded-region-on-direct-io.patch
This patch was dropped because an updated version will be merged
------------------------------------------------------
From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Subject: fat: fallback to buffered write in case of fallocatded region on direct IO
For normal cases of direct IO write, trying to seek to location greater
than file size, makes it fall back to buffered write to fill that region.
Similarly, in case for write in Fallocated region, make it fall to
buffered write.
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Amit Sahrawat <a.sahrawat@xxxxxxxxxxx>
Cc: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/inode.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff -puN fs/fat/inode.c~fat-fallback-to-buffered-write-in-case-of-fallocatded-region-on-direct-io fs/fat/inode.c
--- a/fs/fat/inode.c~fat-fallback-to-buffered-write-in-case-of-fallocatded-region-on-direct-io
+++ a/fs/fat/inode.c
@@ -218,6 +218,14 @@ static ssize_t fat_direct_IO(int rw, str
loff_t size = offset + iov_length(iov, nr_segs);
if (MSDOS_I(inode)->mmu_private < size)
return 0;
+
+ /*
+ * In case of writing in fallocated region, return 0 and
+ * fallback to buffered write.
+ */
+ if (MSDOS_I(inode)->i_disksize >
+ round_up(i_size_read(inode), inode->i_sb->s_blocksize))
+ return 0;
}
/*
_
Patches currently in -mm which might be from namjae.jeon@xxxxxxxxxxx are
fat-permit-to-return-phy-block-number-by-fibmap-in-fallocated-region.patch
linux-next.patch
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