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| author | Christoph Hellwig <hch@lst.de> | 2014-08-21 20:09:25 +0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2014-09-10 23:47:01 +0400 |
| commit | 5f919c9f10c1cf821ee5f414683214a361a1b98c (patch) | |
| tree | 401fab5447d465efa72b750905ea31868a7d4a5b /fs/nfs/pnfs.c | |
| parent | 47abadefad213bb7de9592d2e09a8bd282ddc3de (diff) | |
| download | linux-5f919c9f10c1cf821ee5f414683214a361a1b98c.tar.xz | |
pnfs: allow splicing pre-encoded pages into the layoutcommit args
Currently there is no XDR buffer space allocated for the per-layout driver
layoutcommit payload, which leads to server buffer overflows in the
blocklayout driver even under simple workloads. As we can't do per-layout
sizes for XDR operations we'll have to splice a previously encoded list
of pages into the XDR stream, similar to how we handle ACL buffers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
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, 15 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 57b5728e0b8e..8827ab130ed3 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1854,6 +1854,7 @@ void pnfs_cleanup_layoutcommit(struct nfs4_layoutcommit_data *data) int pnfs_layoutcommit_inode(struct inode *inode, bool sync) { + struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld; struct nfs4_layoutcommit_data *data; struct nfs_inode *nfsi = NFS_I(inode); loff_t end_pos; @@ -1904,6 +1905,20 @@ pnfs_layoutcommit_inode(struct inode *inode, bool sync) data->args.lastbytewritten = end_pos - 1; data->res.server = NFS_SERVER(inode); + if (ld->prepare_layoutcommit) { + status = ld->prepare_layoutcommit(&data->args); + if (status) { + spin_lock(&inode->i_lock); + if (end_pos < nfsi->layout->plh_lwb) + nfsi->layout->plh_lwb = end_pos; + spin_unlock(&inode->i_lock); + put_rpccred(data->cred); + set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags); + goto clear_layoutcommitting; + } + } + + status = nfs4_proc_layoutcommit(data, sync); out: if (status) |