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pNFS: Files and flexfiles always need to commit before layoutcommit

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So ensure that we mark the layout for commit once the write is done,
and then ensure that the commit to ds is finished before sending
layoutcommit.

Note that by doing this, we're able to optimise away the commit
for the case of servers that don't need layoutcommit in order to
return updated attributes.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-06-26 18:54:58 -04:00
parent bc28e1c2e3
commit 2e18d4d822
5 changed files with 30 additions and 9 deletions
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9
fs/nfs/filelayout/filelayout.c
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@ -255,13 +255,16 @@ static int filelayout_read_done_cb(struct rpc_task *task,
static void
filelayout_set_layoutcommit(struct nfs_pgio_header *hdr)
{
loff_t end_offs = 0;
if (FILELAYOUT_LSEG(hdr->lseg)->commit_through_mds ||
hdr->res.verf->committed != NFS_DATA_SYNC)
hdr->res.verf->committed == NFS_FILE_SYNC)
return;
if (hdr->res.verf->committed == NFS_DATA_SYNC)
end_offs = hdr->mds_offset + (loff_t)hdr->res.count;
pnfs_set_layoutcommit(hdr->inode, hdr->lseg,
hdr->mds_offset + hdr->res.count);
/* Note: if the write is unstable, don't set end_offs until commit */
pnfs_set_layoutcommit(hdr->inode, hdr->lseg, end_offs);
dprintk("%s inode %lu pls_end_pos %lu\n", __func__, hdr->inode->i_ino,
(unsigned long) NFS_I(hdr->inode)->layout->plh_lwb);
}