From: Andy Adamson <andros@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Alexandros Batsakis <batsakis@xxxxxxxxxx>
Signed-off-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
Signed-off-by: Dean Hildebrand <dhildeb@xxxxxxxxxx>
Signed-off-by: Fred Isaman <iisaman@xxxxxxxxxxxxxx>
Signed-off-by: Mingyang Guo <guomingyang@xxxxxxxxxxxx>
Signed-off-by: Tao Guo <guotao@xxxxxxxxxxxx>
Signed-off-by: Zhang Jingwang <zhangjingwang@xxxxxxxxxxxx>
Tested-by: Boaz Harrosh <bharrosh@xxxxxxxxxxx>
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
Signed-off-by: Fred Isaman <iisaman@xxxxxxxxxx>
---
fs/nfs/file.c | 3 +
fs/nfs/nfs4_fs.h | 2 +
fs/nfs/nfs4filelayout.c | 18 +++++++
fs/nfs/nfs4proc.c | 94 ++++++++++++++++++++++++++++++++++
fs/nfs/nfs4xdr.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++
fs/nfs/pnfs.c | 94 ++++++++++++++++++++++++++++++++++
fs/nfs/pnfs.h | 9 +++-
fs/nfs/write.c | 15 +++++-
include/linux/nfs4.h | 1 +
include/linux/nfs_fs.h | 1 +
include/linux/nfs_xdr.h | 23 ++++++++
11 files changed, 387 insertions(+), 2 deletions(-)
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index d85a534..85cb95d 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -326,6 +326,9 @@ nfs_file_fsync(struct file *file, int datasync)
ret = xchg(&ctx->error, 0);
if (!ret && status < 0)
ret = status;
+ if (!ret && !datasync)
+ /* application has asked for meta-data sync */
+ ret = pnfs_layoutcommit_inode(inode, 1);
return ret;
}
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index c64be1c..1e612d1 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -262,6 +262,8 @@ extern int nfs4_proc_destroy_session(struct nfs4_session *);
extern int nfs4_init_session(struct nfs_server *server);
extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
struct nfs_fsinfo *fsinfo);
+extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
+ int sync);
static inline bool
is_ds_only_client(struct nfs_client *clp)
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;
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5d61ccc..6f2f402 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -5616,6 +5616,100 @@ int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
}
EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
+static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_layoutcommit_data *data = calldata;
+ struct nfs_server *server = NFS_SERVER(data->args.inode);
+
+ if (nfs4_setup_sequence(server, &data->args.seq_args,
+ &data->res.seq_res, 1, task))
+ return;
+ rpc_call_start(task);
+}
+
+static void
+nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_layoutcommit_data *data = calldata;
+ struct nfs_server *server = NFS_SERVER(data->args.inode);
+
+ if (!nfs4_sequence_done(task, &data->res.seq_res))
+ return;
+
+ switch (task->tk_status) { /* Just ignore these failures */
+ case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
+ case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
+ case NFS4ERR_BADLAYOUT: /* no layout */
+ case NFS4ERR_GRACE: /* loca_recalim always false */
+ task->tk_status = 0;
+ }
+
+ if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
+ nfs_restart_rpc(task, server->nfs_client);
+ return;
+ }
+
+ if (task->tk_status == 0)
+ nfs_post_op_update_inode_force_wcc(data->args.inode,
+ data->res.fattr);
+}
+
+static void nfs4_layoutcommit_release(void *calldata)
+{
+ struct nfs4_layoutcommit_data *data = calldata;
+
+ /* Matched by references in pnfs_set_layoutcommit */
+ put_lseg(data->lseg);
+ put_rpccred(data->cred);
+ kfree(data);
+}
+
+static const struct rpc_call_ops nfs4_layoutcommit_ops = {
+ .rpc_call_prepare = nfs4_layoutcommit_prepare,
+ .rpc_call_done = nfs4_layoutcommit_done,
+ .rpc_release = nfs4_layoutcommit_release,
+};
+
+int
+nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, int sync)
+{
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
+ .rpc_argp = &data->args,
+ .rpc_resp = &data->res,
+ .rpc_cred = data->cred,
+ };
+ struct rpc_task_setup task_setup_data = {
+ .task = &data->task,
+ .rpc_client = NFS_CLIENT(data->args.inode),
+ .rpc_message = &msg,
+ .callback_ops = &nfs4_layoutcommit_ops,
+ .callback_data = data,
+ .flags = RPC_TASK_ASYNC,
+ };
+ struct rpc_task *task;
+ int status = 0;
+
+ dprintk("NFS: %4d initiating layoutcommit call. sync %d "
+ "lbw: %llu inode %lu\n",
+ data->task.tk_pid, sync,
+ data->args.lastbytewritten,
+ data->args.inode->i_ino);
+
+ task = rpc_run_task(&task_setup_data);
+ if (IS_ERR(task))
+ return PTR_ERR(task);
+ if (!sync)
+ goto out;
+ status = nfs4_wait_for_completion_rpc_task(task);
+ if (status != 0)
+ goto out;
+ status = task->tk_status;
+out:
+ dprintk("%s: status %d\n", __func__, status);
+ rpc_put_task(task);
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 07cdf92..207d399 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -324,6 +324,18 @@ static int nfs4_stat_to_errno(int);
#define decode_layoutget_maxsz (op_decode_hdr_maxsz + 8 + \
decode_stateid_maxsz + \
XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
+#define encode_layoutcommit_maxsz (op_encode_hdr_maxsz + \
+ 2 /* offset */ + \
+ 2 /* length */ + \
+ 1 /* reclaim */ + \
+ encode_stateid_maxsz + \
+ 1 /* new offset (true) */ + \
+ 2 /* last byte written */ + \
+ 1 /* nt_timechanged (false) */ + \
+ 1 /* layoutupdate4 layout type */ + \
+ 1 /* NULL filelayout layoutupdate4 payload */)
+#define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3)
+
#else /* CONFIG_NFS_V4_1 */
#define encode_sequence_maxsz 0
#define decode_sequence_maxsz 0
@@ -727,6 +739,17 @@ static int nfs4_stat_to_errno(int);
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_layoutget_maxsz)
+#define NFS4_enc_layoutcommit_sz (compound_encode_hdr_maxsz + \
+ encode_sequence_maxsz +\
+ encode_putfh_maxsz + \
+ encode_layoutcommit_maxsz + \
+ encode_getattr_maxsz)
+#define NFS4_dec_layoutcommit_sz (compound_decode_hdr_maxsz + \
+ decode_sequence_maxsz + \
+ decode_putfh_maxsz + \
+ decode_layoutcommit_maxsz + \
+ decode_getattr_maxsz)
+
const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH +
compound_encode_hdr_maxsz +
@@ -1816,6 +1839,34 @@ encode_layoutget(struct xdr_stream *xdr,
hdr->nops++;
hdr->replen += decode_layoutget_maxsz;
}
+
+static int
+encode_layoutcommit(struct xdr_stream *xdr,
+ const struct nfs4_layoutcommit_args *args,
+ struct compound_hdr *hdr)
+{
+ __be32 *p;
+
+ dprintk("%s: lbw: %llu type: %d\n", __func__, args->lastbytewritten,
+ NFS_SERVER(args->inode)->pnfs_curr_ld->id);
+
+ p = reserve_space(xdr, 48 + NFS4_STATEID_SIZE);
+ *p++ = cpu_to_be32(OP_LAYOUTCOMMIT);
+ /* Only whole file layouts */
+ p = xdr_encode_hyper(p, 0); /* offset */
+ p = xdr_encode_hyper(p, NFS4_MAX_UINT64); /* length */
+ *p++ = cpu_to_be32(0); /* reclaim */
+ p = xdr_encode_opaque_fixed(p, args->stateid.data, NFS4_STATEID_SIZE);
+ *p++ = cpu_to_be32(1); /* newoffset = TRUE */
+ p = xdr_encode_hyper(p, args->lastbytewritten);
+ *p++ = cpu_to_be32(0); /* Never send time_modify_changed */
+ *p++ = cpu_to_be32(NFS_SERVER(args->inode)->pnfs_curr_ld->id);/* type */
+ *p++ = cpu_to_be32(0); /* no file layout payload */
+
+ hdr->nops++;
+ hdr->replen += decode_layoutcommit_maxsz;
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -2607,6 +2658,26 @@ static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
encode_layoutget(xdr, args, &hdr);
encode_nops(&hdr);
}
+
+/*
+ * Encode LAYOUTCOMMIT request
+ */
+static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutcommit_args *args)
+{
+ struct compound_hdr hdr = {
+ .minorversion = nfs4_xdr_minorversion(&args->seq_args),
+ };
+
+ encode_compound_hdr(xdr, req, &hdr);
+ encode_sequence(xdr, &args->seq_args, &hdr);
+ encode_putfh(xdr, NFS_FH(args->inode), &hdr);
+ encode_layoutcommit(xdr, args, &hdr);
+ encode_getfattr(xdr, args->bitmask, &hdr);
+ encode_nops(&hdr);
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
@@ -5007,6 +5078,35 @@ out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
+
+static int decode_layoutcommit(struct xdr_stream *xdr,
+ struct rpc_rqst *req,
+ struct nfs4_layoutcommit_res *res)
+{
+ __be32 *p;
+ __u32 sizechanged;
+ int status;
+
+ status = decode_op_hdr(xdr, OP_LAYOUTCOMMIT);
+ if (status)
+ return status;
+
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ sizechanged = be32_to_cpup(p);
+
+ if (sizechanged) {
+ /* throw away new size */
+ p = xdr_inline_decode(xdr, 8);
+ if (unlikely(!p))
+ goto out_overflow;
+ }
+ return 0;
+out_overflow:
+ print_overflow_msg(__func__, xdr);
+ return -EIO;
+}
#endif /* CONFIG_NFS_V4_1 */
/*
@@ -6068,6 +6168,34 @@ static int nfs4_xdr_dec_layoutget(struct rpc_rqst *rqstp,
out:
return status;
}
+
+/*
+ * Decode LAYOUTCOMMIT response
+ */
+static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct nfs4_layoutcommit_res *res)
+{
+ struct compound_hdr hdr;
+ int status;
+
+ status = decode_compound_hdr(xdr, &hdr);
+ if (status)
+ goto out;
+ status = decode_sequence(xdr, &res->seq_res, rqstp);
+ if (status)
+ goto out;
+ status = decode_putfh(xdr);
+ if (status)
+ goto out;
+ status = decode_layoutcommit(xdr, rqstp, res);
+ if (status)
+ goto out;
+ decode_getfattr(xdr, res->fattr, res->server,
+ !RPC_IS_ASYNC(rqstp->rq_task));
+out:
+ return status;
+}
#endif /* CONFIG_NFS_V4_1 */
/**
@@ -6269,6 +6397,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(RECLAIM_COMPLETE, enc_reclaim_complete, dec_reclaim_complete),
PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo),
PROC(LAYOUTGET, enc_layoutget, dec_layoutget),
+ PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit),
#endif /* CONFIG_NFS_V4_1 */
};
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index c675659..2a08ca0 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -946,3 +946,97 @@ pnfs_try_to_read_data(struct nfs_read_data *rdata,
dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs);
return trypnfs;
}
+
+/*
+ * Currently there is only one (whole file) write lseg.
+ */
+static struct pnfs_layout_segment *pnfs_list_write_lseg(struct inode *inode)
+{
+ struct pnfs_layout_segment *lseg, *rv = NULL;
+
+ list_for_each_entry(lseg, &NFS_I(inode)->layout->plh_segs, pls_list)
+ if (lseg->pls_range.iomode == IOMODE_RW)
+ rv = lseg;
+ return rv;
+}
+
+void
+pnfs_set_layoutcommit(struct nfs_write_data *wdata)
+{
+ struct nfs_inode *nfsi = NFS_I(wdata->inode);
+ loff_t end_pos = wdata->args.offset + wdata->res.count;
+
+ spin_lock(&nfsi->vfs_inode.i_lock);
+ if (!test_and_set_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
+ /* references matched in nfs4_layoutcommit_release */
+ get_lseg(wdata->lseg);
+ wdata->lseg->pls_lc_cred =
+ get_rpccred(wdata->args.context->state->owner->so_cred);
+ mark_inode_dirty_sync(wdata->inode);
+ dprintk("%s: Set layoutcommit for inode %lu ",
+ __func__, wdata->inode->i_ino);
+ }
+ if (end_pos > wdata->lseg->pls_end_pos)
+ wdata->lseg->pls_end_pos = end_pos;
+ spin_unlock(&nfsi->vfs_inode.i_lock);
+}
+EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit);
+
+int
+pnfs_layoutcommit_inode(struct inode *inode, int sync)
+{
+ struct nfs4_layoutcommit_data *data;
+ struct nfs_inode *nfsi = NFS_I(inode);
+ struct pnfs_layout_segment *lseg;
+ struct rpc_cred *cred;
+ loff_t end_pos;
+ int status = 0;
+
+ dprintk("--> %s inode %lu\n", __func__, inode->i_ino);
+
+ /* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */
+ data = kzalloc(sizeof(*data), GFP_NOFS);
+ spin_lock(&inode->i_lock);
+
+ if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
+ spin_unlock(&inode->i_lock);
+ kfree(data);
+ goto out;
+ }
+ /*
+ * Currently only one (whole file) write lseg which is referenced
+ * in pnfs_set_layoutcommit and will be found.
+ */
+ lseg = pnfs_list_write_lseg(inode);
+
+ end_pos = lseg->pls_end_pos;
+ cred = lseg->pls_lc_cred;
+ lseg->pls_end_pos = 0;
+ lseg->pls_lc_cred = NULL;
+
+ if (!data) {
+ put_lseg(lseg);
+ spin_unlock(&inode->i_lock);
+ put_rpccred(cred);
+ status = -ENOMEM;
+ goto out;
+ } else {
+ memcpy(&data->args.stateid.data, nfsi->layout->plh_stateid.data,
+ sizeof(nfsi->layout->plh_stateid.data));
+ }
+ spin_unlock(&inode->i_lock);
+
+ data->args.inode = inode;
+ data->lseg = lseg;
+ data->cred = cred;
+ nfs_fattr_init(&data->fattr);
+ data->args.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
+ data->res.fattr = &data->fattr;
+ data->args.lastbytewritten = end_pos - 1;
+ data->res.server = NFS_SERVER(inode);
+
+ status = nfs4_proc_layoutcommit(data, sync);
+out:
+ dprintk("<-- %s status %d\n", __func__, status);
+ return status;
+}
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 5370f1b..0806c77 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -43,6 +43,8 @@ struct pnfs_layout_segment {
atomic_t pls_refcount;
unsigned long pls_flags;
struct pnfs_layout_hdr *pls_layout;
+ struct rpc_cred *pls_lc_cred; /* LAYOUTCOMMIT credential */
+ loff_t pls_end_pos; /* LAYOUTCOMMIT write end */
};
enum pnfs_try_status {
@@ -152,7 +154,8 @@ bool pnfs_roc(struct inode *ino);
void pnfs_roc_release(struct inode *ino);
void pnfs_roc_set_barrier(struct inode *ino, u32 barrier);
bool pnfs_roc_drain(struct inode *ino, u32 *barrier);
-
+void pnfs_set_layoutcommit(struct nfs_write_data *wdata);
+int pnfs_layoutcommit_inode(struct inode *inode, int sync);
static inline int lo_fail_bit(u32 iomode)
{
@@ -325,6 +328,10 @@ static inline void pnfs_clear_request_commit(struct nfs_page *req)
{
}
+static inline int pnfs_layoutcommit_inode(struct inode *inode, int sync)
+{
+ return 0;
+}
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index e7aeda0..a03c11f 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1562,7 +1562,20 @@ static int nfs_commit_unstable_pages(struct inode *inode, struct writeback_contr
int nfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
- return nfs_commit_unstable_pages(inode, wbc);
+ int ret;
+
+ ret = nfs_commit_unstable_pages(inode, wbc);
+ if (ret >= 0 && test_bit(NFS_INO_LAYOUTCOMMIT, &NFS_I(inode)->flags)) {
+ int status, sync = wbc->sync_mode;
+
+ if (wbc->nonblocking || wbc->for_background)
+ sync = 0;
+
+ status = pnfs_layoutcommit_inode(inode, sync);
+ if (status < 0)
+ return status;
+ }
+ return ret;
}
/*
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index 134716e..bf22cfa 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -560,6 +560,7 @@ enum {
NFSPROC4_CLNT_RECLAIM_COMPLETE,
NFSPROC4_CLNT_LAYOUTGET,
NFSPROC4_CLNT_GETDEVICEINFO,
+ NFSPROC4_CLNT_LAYOUTCOMMIT,
};
/* nfs41 types */
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 9d434f0..5765126 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -223,6 +223,7 @@ struct nfs_inode {
#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
#define NFS_INO_COMMIT (7) /* inode is committing unstable writes */
#define NFS_INO_PNFS_COMMIT (8) /* use pnfs code for commit */
+#define NFS_INO_LAYOUTCOMMIT (9) /* layoutcommit required */
static inline struct nfs_inode *NFS_I(const struct inode *inode)
{
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index ac0c0e5..84f3585 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -236,6 +236,29 @@ struct nfs4_getdeviceinfo_res {
struct nfs4_sequence_res seq_res;
};
+struct nfs4_layoutcommit_args {
+ nfs4_stateid stateid;
+ __u64 lastbytewritten;
+ struct inode *inode;
+ const u32 *bitmask;
+ struct nfs4_sequence_args seq_args;
+};
+
+struct nfs4_layoutcommit_res {
+ struct nfs_fattr *fattr;
+ const struct nfs_server *server;
+ struct nfs4_sequence_res seq_res;
+};
+
+struct nfs4_layoutcommit_data {
+ struct rpc_task task;
+ struct nfs_fattr fattr;
+ struct pnfs_layout_segment *lseg;
+ struct rpc_cred *cred;
+ struct nfs4_layoutcommit_args args;
+ struct nfs4_layoutcommit_res res;
+};
+
/*
* Arguments to the open call.
*/
--
1.7.2.1
--
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