diff options
| author | Weston Andros Adamson <dros@primarydata.com> | 2014-05-15 11:56:51 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-05-29 11:11:47 -0400 |
| commit | 0f9c429eca07aca2764ccd751e2b48ba5397b936 (patch) | |
| tree | 47511b14902ff683a445e00cf4408b2054c8d547 /fs/nfs/pnfs.c | |
| parent | 6094f83864c1d1296566a282cba05ba613f151ee (diff) | |
nfs: chain calls to pg_test
Now that pg_test can change the size of the request (by returning a non-zero
size smaller than the request), pg_test functions that call other
pg_test functions must return the minimum of the result - or 0 if any fail.
Also clean up the logic of some pg_test functions so that all checks are
for contitions where coalescing is not possible.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index de6eb16f94d..354c53cd409 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1442,8 +1442,12 @@ size_t pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req) { - if (pgio->pg_lseg == NULL) - return nfs_generic_pg_test(pgio, prev, req); + unsigned int size; + + size = nfs_generic_pg_test(pgio, prev, req); + + if (!size) + return 0; /* * Test if a nfs_page is fully contained in the pnfs_layout_range. @@ -1459,10 +1463,11 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, * first byte that lies outside the pnfs_layout_range. FIXME? * */ - if (req_offset(req) < end_offset(pgio->pg_lseg->pls_range.offset, + if (req_offset(req) >= end_offset(pgio->pg_lseg->pls_range.offset, pgio->pg_lseg->pls_range.length)) - return req->wb_bytes; - return 0; + return 0; + + return min(size, req->wb_bytes); } EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |