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gfs2: Use iomap for stuffed direct I/O reads 

Remove the fallback code from direct to buffered I/O for stuffed reads.

For stuffed writes, we must keep the fallback code: the deferred glock
we are holding under direct I/O doesn't allow to write to the inode or
change the file size.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2018-06-27 01:59:18 +01:00
parent 0ed91eca11
commit 1d45bb7f9d
1 changed files with 0 additions and 6 deletions
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6
fs/gfs2/file.c
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@ -706,14 +706,8 @@ static ssize_t gfs2_file_direct_read(struct kiocb *iocb, struct iov_iter *to)
if (ret)
goto out_uninit;
/* fall back to buffered I/O for stuffed files */
ret = -ENOTBLK;
if (gfs2_is_stuffed(ip))
goto out;
ret = iomap_dio_rw(iocb, to, &gfs2_iomap_ops, NULL);
out:
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);