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authorWeston Andros Adamson <dros@primarydata.com>2015-01-30 19:01:02 +0300
committerTom Haynes <loghyr@primarydata.com>2015-02-03 22:06:54 +0300
commit7c13789e3e6c66dbcaade1760087429240eb3d27 (patch)
tree3d546df6c9feb8e79fc9e9575343d47e879ee507 /fs/nfs/pnfs.c
parentcb5d04bc39e914124e811ea55f3034d2379a5f6c (diff)
downloadlinux-7c13789e3e6c66dbcaade1760087429240eb3d27.tar.xz
pnfs: lookup new lseg at lseg boundary
Before mirroring support was added, the pageio descriptor's pg_lseg was set to null when an RPC was sent. Because of this, pg_init was called at lseg boundaries with pg_lseg = NULL, and it could be set to the new lseg. Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index c7be9b997f5e..9304984bde80 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1788,10 +1788,16 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio,
seg_end = end_offset(pgio->pg_lseg->pls_range.offset,
pgio->pg_lseg->pls_range.length);
req_start = req_offset(req);
- WARN_ON_ONCE(req_start > seg_end);
+ WARN_ON_ONCE(req_start >= seg_end);
/* start of request is past the last byte of this segment */
- if (req_start >= seg_end)
+ if (req_start >= seg_end) {
+ /* reference the new lseg */
+ if (pgio->pg_ops->pg_cleanup)
+ pgio->pg_ops->pg_cleanup(pgio);
+ if (pgio->pg_ops->pg_init)
+ pgio->pg_ops->pg_init(pgio, req);
return 0;
+ }
/* adjust 'size' iff there are fewer bytes left in the
* segment than what nfs_generic_pg_test returned */