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| author | Weston Andros Adamson | 2014-05-15 17:56:55 +0200 |
|---|---|---|
| committer | Trond Myklebust | 2014-05-29 17:11:49 +0200 |
| commit | 19b54848fee419f0bb35479e4ea98d9f2b985657 (patch) | |
| tree | 979464ece075c8edaf8a9dac88ff9e8904f2ded3 /fs/nfs/pnfs.c | |
| parent | pnfs: support multiple verfs per direct req (diff) | |
| download | kernel-qcow2-linux-19b54848fee419f0bb35479e4ea98d9f2b985657.tar.gz kernel-qcow2-linux-19b54848fee419f0bb35479e4ea98d9f2b985657.tar.xz kernel-qcow2-linux-19b54848fee419f0bb35479e4ea98d9f2b985657.zip | |
pnfs: allow non page aligned pnfs layout segments
Remove alignment checks that would revert to MDS and change pg_test
to return the max ammount left in the segment (or other pg_test call)
up to size of passed request, or 0 if no space is left.
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 | 25 |
1 files changed, 10 insertions, 15 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 6ef108b1d85f..ce46a417e500 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1388,11 +1388,6 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r WARN_ON_ONCE(pgio->pg_lseg != NULL); - if (req->wb_offset != req->wb_pgbase) { - nfs_pageio_reset_read_mds(pgio); - return; - } - if (pgio->pg_dreq == NULL) rd_size = i_size_read(pgio->pg_inode) - req_offset(req); else @@ -1417,11 +1412,6 @@ pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, { WARN_ON_ONCE(pgio->pg_lseg != NULL); - if (req->wb_offset != req->wb_pgbase) { - nfs_pageio_reset_write_mds(pgio); - return; - } - pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, req->wb_context, req_offset(req), @@ -1443,9 +1433,9 @@ pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req) { unsigned int size; + u64 end; size = nfs_generic_pg_test(pgio, prev, req); - if (!size) return 0; @@ -1463,11 +1453,16 @@ 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, - pgio->pg_lseg->pls_range.length)) - return 0; + if (pgio->pg_lseg) { + end = end_offset(pgio->pg_lseg->pls_range.offset, + pgio->pg_lseg->pls_range.length); + WARN_ON_ONCE(req_offset(req) > end); + if (req_offset(req) >= end) + return 0; + size = min((unsigned int)(end - req_offset(req)), size); + } - return min(size, req->wb_bytes); + return size; } EXPORT_SYMBOL_GPL(pnfs_generic_pg_test); |