diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2023-11-17 14:25:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 02:35:18 +0300 |
| commit | 75aa038d9f6ea47a10dda28a6c9fb864fccfab60 (patch) | |
| tree | 9a2d6f61eb525f265a521a267833b31408d98b5b /fs/nfs | |
| parent | bcdb16220a584003b9093eac5dcff0b73776064f (diff) | |
| download | linux-75aa038d9f6ea47a10dda28a6c9fb864fccfab60.tar.xz | |
pNFS: Fix the pnfs block driver's calculation of layoutget size
[ Upstream commit 8a6291bf3b0eae1bf26621e6419a91682f2d6227 ]
Instead of relying on the value of the 'bytes_left' field, we should
calculate the layout size based on the offset of the request that is
being written out.
Reported-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Fixes: 954998b60caa ("NFS: Fix error handling for O_DIRECT write scheduling")
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Tested-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/blocklayout/blocklayout.c | 5 | ||||
| -rw-r--r-- | fs/nfs/direct.c | 5 | ||||
| -rw-r--r-- | fs/nfs/internal.h | 2 | ||||
| -rw-r--r-- | fs/nfs/pnfs.c | 3 |
4 files changed, 8 insertions, 7 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c index 1d1d7abc3205..6be13e0ec170 100644 --- a/fs/nfs/blocklayout/blocklayout.c +++ b/fs/nfs/blocklayout/blocklayout.c @@ -895,10 +895,9 @@ bl_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req) } if (pgio->pg_dreq == NULL) - wb_size = pnfs_num_cont_bytes(pgio->pg_inode, - req->wb_index); + wb_size = pnfs_num_cont_bytes(pgio->pg_inode, req->wb_index); else - wb_size = nfs_dreq_bytes_left(pgio->pg_dreq); + wb_size = nfs_dreq_bytes_left(pgio->pg_dreq, req_offset(req)); pnfs_generic_pg_init_write(pgio, req, wb_size); diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index f6c74f424691..5918c67dae0d 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -205,9 +205,10 @@ static void nfs_direct_req_release(struct nfs_direct_req *dreq) kref_put(&dreq->kref, nfs_direct_req_free); } -ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq) +ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq, loff_t offset) { - return dreq->bytes_left; + loff_t start = offset - dreq->io_start; + return dreq->max_count - start; } EXPORT_SYMBOL_GPL(nfs_dreq_bytes_left); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 9c9cf764f600..b1fa81c9dff6 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -655,7 +655,7 @@ extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry); /* direct.c */ void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo, struct nfs_direct_req *dreq); -extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq); +extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq, loff_t offset); /* nfs4proc.c */ extern struct nfs_client *nfs4_init_client(struct nfs_client *clp, diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 84343aefbbd6..9084f156d67b 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -2729,7 +2729,8 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r 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); + rd_size = nfs_dreq_bytes_left(pgio->pg_dreq, + req_offset(req)); pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, nfs_req_openctx(req), |