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authorTrond Myklebust <trond.myklebust@primarydata.com>2016-06-27 01:54:58 +0300
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-07-06 02:08:01 +0300
commit2e18d4d822ea9cc811ea26a880cf2ed47cbf8889 (patch)
tree1ce746bef1598990b96f6f5b4e0c11017a3c9ee7 /fs/nfs/filelayout
parentbc28e1c2e3c8a4c5198ebfd8bbae0afd73dfafd5 (diff)
downloadlinux-2e18d4d822ea9cc811ea26a880cf2ed47cbf8889.tar.xz
pNFS: Files and flexfiles always need to commit before layoutcommit
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>
Diffstat (limited to 'fs/nfs/filelayout')
-rw-r--r--fs/nfs/filelayout/filelayout.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index b4c1407e8fe4..25bd91a6e088 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -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);
}