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| author | Peng Tao <tao.peng@primarydata.com> | 2015-01-24 22:14:52 +0800 |
|---|---|---|
| committer | Tom Haynes <loghyr@primarydata.com> | 2015-02-03 11:06:53 -0800 |
| commit | cb5d04bc39e914124e811ea55f3034d2379a5f6c (patch) | |
| tree | 3243cf5c3cab80be4dec0f1f8be9cf5bcdb324bb /fs/nfs/pnfs.c | |
| parent | 8f9cdcb26b62f1a9b071a82820c7b08ac7439406 (diff) | |
| download | linux-stable-cb5d04bc39e914124e811ea55f3034d2379a5f6c.tar.gz linux-stable-cb5d04bc39e914124e811ea55f3034d2379a5f6c.tar.bz2 linux-stable-cb5d04bc39e914124e811ea55f3034d2379a5f6c.zip | |
nfs41: .init_read and .init_write can be called with valid pg_lseg
With pgio refactoring in v3.15, .init_read and .init_write can be
called with valid pgio->pg_lseg. file layout was fixed at that time
by commit c6194271f (pnfs: filelayout: support non page aligned
layouts). But the generic helper still needs to be fixed.
Cc: stable@vger.kernel.org # 3.15+
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 0fb0f1920a1f..c7be9b997f5e 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1711,19 +1711,19 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r { u64 rd_size = req->wb_bytes; - WARN_ON_ONCE(pgio->pg_lseg != NULL); - - if (pgio->pg_dreq == NULL) - rd_size = i_size_read(pgio->pg_inode) - req_offset(req); - else - rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); - - pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, - req->wb_context, - req_offset(req), - rd_size, - IOMODE_READ, - GFP_KERNEL); + if (pgio->pg_lseg == NULL) { + if (pgio->pg_dreq == NULL) + rd_size = i_size_read(pgio->pg_inode) - req_offset(req); + else + rd_size = nfs_dreq_bytes_left(pgio->pg_dreq); + + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + req_offset(req), + rd_size, + IOMODE_READ, + GFP_KERNEL); + } /* If no lseg, fall back to read through mds */ if (pgio->pg_lseg == NULL) nfs_pageio_reset_read_mds(pgio); @@ -1735,14 +1735,13 @@ void pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req, u64 wb_size) { - WARN_ON_ONCE(pgio->pg_lseg != NULL); - - pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, - req->wb_context, - req_offset(req), - wb_size, - IOMODE_RW, - GFP_NOFS); + if (pgio->pg_lseg == NULL) + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + req_offset(req), + wb_size, + IOMODE_RW, + GFP_NOFS); /* If no lseg, fall back to write through mds */ if (pgio->pg_lseg == NULL) nfs_pageio_reset_write_mds(pgio); |