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authorWeston Andros Adamson <dros@primarydata.com>2014-09-19 18:55:07 +0400
committerTom Haynes <loghyr@primarydata.com>2015-02-03 22:06:45 +0300
commita7d42ddb3099727f58366fa006f850a219cce6c8 (patch)
treec794857eb5c3ca29f77e259ecd3c155f841134d1 /fs/nfs/write.c
parentb57ff1303a2d4d1484c7a82bd80a3e014d6cdf5e (diff)
downloadlinux-a7d42ddb3099727f58366fa006f850a219cce6c8.tar.xz
nfs: add mirroring support to pgio layer
This patch adds mirrored write support to the pgio layer. The default is to use one mirror, but pgio callers may define callbacks to change this to any value up to the (arbitrarily selected) limit of 16. The basic idea is to break out members of nfs_pageio_descriptor that cannot be shared between mirrored DSes and put them in a new structure. Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Diffstat (limited to 'fs/nfs/write.c')
-rw-r--r--fs/nfs/write.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 2bee165fddcf..ceacfeeb28c2 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -906,7 +906,7 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr)
if (nfs_write_need_commit(hdr)) {
memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
nfs_mark_request_commit(req, hdr->lseg, &cinfo,
- 0);
+ hdr->pgio_mirror_idx);
goto next;
}
remove_req:
@@ -1304,8 +1304,14 @@ EXPORT_SYMBOL_GPL(nfs_pageio_init_write);
void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio)
{
+ struct nfs_pgio_mirror *mirror;
+
pgio->pg_ops = &nfs_pgio_rw_ops;
- pgio->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize;
+
+ nfs_pageio_stop_mirroring(pgio);
+
+ mirror = &pgio->pg_mirrors[0];
+ mirror->pg_bsize = NFS_SERVER(pgio->pg_inode)->wsize;
}
EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds);