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| author | Weston Andros Adamson <dros@primarydata.com> | 2014-05-15 19:56:43 +0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-05-29 19:11:43 +0400 |
| commit | b4fdac1a5150174df0847a45dc6612ce5ce3daeb (patch) | |
| tree | 477f3dc72760a8ff622934723c4a984cd4c9ce5d /fs/nfs/objlayout/objio_osd.c | |
| parent | 8c8f1ac109726e4ed44a920f5c962c84610d4a17 (diff) | |
| download | linux-b4fdac1a5150174df0847a45dc6612ce5ce3daeb.tar.xz | |
nfs: modify pg_test interface to return size_t
This is a step toward allowing pg_test to inform the the
coalescing code to reduce the size of requests so they may fit in
whatever scheme the pg_test callback wants to define.
For now, just return the size of the request if there is space, or 0
if there is not. This shouldn't change any behavior as it acts
the same as when the pg_test functions returned bool.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/objlayout/objio_osd.c')
| -rw-r--r-- | fs/nfs/objlayout/objio_osd.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c index 426b366b0b33..71b9c69dbe9c 100644 --- a/fs/nfs/objlayout/objio_osd.c +++ b/fs/nfs/objlayout/objio_osd.c @@ -564,14 +564,19 @@ int objio_write_pagelist(struct nfs_pgio_data *wdata, int how) return 0; } -static bool objio_pg_test(struct nfs_pageio_descriptor *pgio, +/* + * Return 0 if @req cannot be coalesced into @pgio, otherwise return the number + * of bytes (maximum @req->wb_bytes) that can be coalesced. + */ +static size_t objio_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req) { - if (!pnfs_generic_pg_test(pgio, prev, req)) - return false; + if (!pnfs_generic_pg_test(pgio, prev, req) || + pgio->pg_count + req->wb_bytes > + (unsigned long)pgio->pg_layout_private) + return 0; - return pgio->pg_count + req->wb_bytes <= - (unsigned long)pgio->pg_layout_private; + return req->wb_bytes; } static void objio_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) |