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NFSv4.1/pnfs: Ensure that writes respect the O_SYNC flag when doing O_DIRECT

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If the caller does not specify the O_SYNC flag, then it is legitimate
to return from O_DIRECT without doing a pNFS layoutcommit operation.
However if the file is opened O_DIRECT|O_SYNC then we'd better get it
right.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-03-25 18:58:53 -04:00
parent 9e1681c2e7
commit a0815d556d
3 changed files with 3 additions and 0 deletions
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1
fs/nfs/direct.c
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@ -1034,6 +1034,7 @@ ssize_t nfs_file_direct_write(struct kiocb *iocb, struct iov_iter *iter,
if (i_size_read(inode) < iocb->ki_pos)
i_size_write(inode, iocb->ki_pos);
spin_unlock(&inode->i_lock);
generic_write_sync(file, pos, result);
}
}
nfs_direct_req_release(dreq);

1
fs/nfs/file.c
View file

@ -281,6 +281,7 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
trace_nfs_fsync_enter(inode);
nfs_inode_dio_wait(inode);
do {
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret != 0)

1
fs/nfs/nfs4file.c
View file

@ -104,6 +104,7 @@ nfs4_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
trace_nfs_fsync_enter(inode);
nfs_inode_dio_wait(inode);
do {
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret != 0)