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authorAndy Adamson <andros@netapp.com>2011-03-23 13:27:54 +0000
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-03-23 15:29:04 -0400
commit863a3c6c686d5773f7192a4818769e15db12ce08 (patch)
tree3ff8bf04c583aa0c16ae30b0821bc9148d49a47a /fs/nfs/nfs4filelayout.c
parente0c2b3801828aadb65dec9f67f7c6b7a675ad007 (diff)
downloadop-kernel-dev-863a3c6c686d5773f7192a4818769e15db12ce08.zip
op-kernel-dev-863a3c6c686d5773f7192a4818769e15db12ce08.tar.gz
NFSv4.1: layoutcommit
The filelayout driver sends LAYOUTCOMMIT only when COMMIT goes to the data server (as opposed to the MDS) and the data server WRITE is not NFS_FILE_SYNC. Only whole file layout support means that there is only one IOMODE_RW layout segment. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Alexandros Batsakis <batsakis@netapp.com> Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> Signed-off-by: Mingyang Guo <guomingyang@nrchpc.ac.cn> Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> Signed-off-by: Zhang Jingwang <zhangjingwang@nrchpc.ac.cn> Tested-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4filelayout.c')
-rw-r--r--fs/nfs/nfs4filelayout.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index 97e75a2..fc1a0e9 100644
--- a/fs/nfs/nfs4filelayout.c
+++ b/fs/nfs/nfs4filelayout.c
@@ -154,6 +154,23 @@ static int filelayout_read_done_cb(struct rpc_task *task,
}
/*
+ * We reference the rpc_cred of the first WRITE that triggers the need for
+ * a LAYOUTCOMMIT, and use it to send the layoutcommit compound.
+ * rfc5661 is not clear about which credential should be used.
+ */
+static void
+filelayout_set_layoutcommit(struct nfs_write_data *wdata)
+{
+ if (FILELAYOUT_LSEG(wdata->lseg)->commit_through_mds ||
+ wdata->res.verf->committed == NFS_FILE_SYNC)
+ return;
+
+ pnfs_set_layoutcommit(wdata);
+ dprintk("%s ionde %lu pls_end_pos %lu\n", __func__, wdata->inode->i_ino,
+ (unsigned long) wdata->lseg->pls_end_pos);
+}
+
+/*
* Call ops for the async read/write cases
* In the case of dense layouts, the offset needs to be reset to its
* original value.
@@ -210,6 +227,7 @@ static int filelayout_write_done_cb(struct rpc_task *task,
return -EAGAIN;
}
+ filelayout_set_layoutcommit(data);
return 0;
}
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