Shows the implementation ids in /proc/self/mountstats. This doesn't break
the nfs-utils mountstats tool.
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxx>
---
fs/nfs/client.c | 1 +
fs/nfs/nfs4proc.c | 21 +++++++++++++++++++++
fs/nfs/nfs4xdr.c | 42 +++++++++++++++++++++++++++++++++++++-----
fs/nfs/super.c | 8 ++++++++
include/linux/nfs_fs_sb.h | 2 ++
include/linux/nfs_xdr.h | 15 +++++++--------
6 files changed, 76 insertions(+), 13 deletions(-)
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index d0f850f..3fd9a47 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -302,6 +302,7 @@ static void nfs_free_client(struct nfs_client *clp)
kfree(clp->cl_hostname);
kfree(clp->server_scope);
+ kfree(clp->impl_id);
kfree(clp);
dprintk("<-- nfs_free_client()\n");
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 20c3bb0..90a17cc 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4950,11 +4950,24 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
goto out;
}
+ res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
+ if (unlikely(!res.impl_id)) {
+ status = -ENOMEM;
+ goto out_server_scope;
+ }
+
status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
if (!status)
status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
if (!status) {
+ /* use the most recent implementation id */
+ kfree(clp->impl_id);
+ clp->impl_id = res.impl_id;
+ } else
+ kfree(res.impl_id);
+
+ if (!status) {
if (clp->server_scope &&
!nfs41_same_server_scope(clp->server_scope,
res.server_scope)) {
@@ -4970,8 +4983,16 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
goto out;
}
}
+
+out_server_scope:
kfree(res.server_scope);
out:
+ if (clp->impl_id)
+ dprintk("%s: Server Implementation ID: "
+ "domain: %s, name: %s, date: %llu,%u\n",
+ __func__, clp->impl_id->domain, clp->impl_id->name,
+ clp->impl_id->date.seconds,
+ clp->impl_id->date.nseconds);
dprintk("<-- %s status= %d\n", __func__, status);
return status;
}
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 70ded94..6bf3fe9 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -291,7 +291,11 @@ static int nfs4_stat_to_errno(int);
/* eir_server_scope<> */ \
XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 + \
1 /* eir_server_impl_id array length */ + \
- 0 /* ignored eir_server_impl_id contents */)
+ 1 /* nii_domain */ + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 1 /* nii_name */ + \
+ XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + \
+ 3 /* nii_date */)
#define encode_channel_attrs_maxsz (6 + 1 /* ca_rdma_ird.len (0) */)
#define decode_channel_attrs_maxsz (6 + \
1 /* ca_rdma_ird.len */ + \
@@ -5253,6 +5257,7 @@ static int decode_exchange_id(struct xdr_stream *xdr,
char *dummy_str;
int status;
struct nfs_client *clp = res->client;
+ uint32_t impl_id_count;
status = decode_op_hdr(xdr, OP_EXCHANGE_ID);
if (status)
@@ -5294,11 +5299,38 @@ static int decode_exchange_id(struct xdr_stream *xdr,
memcpy(res->server_scope->server_scope, dummy_str, dummy);
res->server_scope->server_scope_sz = dummy;
- /* Throw away Implementation id array */
- status = decode_opaque_inline(xdr, &dummy, &dummy_str);
- if (unlikely(status))
- return status;
+ /* Implementation Id */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_overflow;
+ impl_id_count = be32_to_cpup(p++);
+ if (impl_id_count) {
+ /* nii_domain */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->impl_id->domain, dummy_str, dummy);
+
+ /* nii_name */
+ status = decode_opaque_inline(xdr, &dummy, &dummy_str);
+ if (unlikely(status))
+ return status;
+ if (unlikely(dummy > NFS4_OPAQUE_LIMIT))
+ return -EIO;
+ memcpy(res->impl_id->name, dummy_str, dummy);
+
+ /* nii_date */
+ p = xdr_inline_decode(xdr, 12);
+ if (unlikely(!p))
+ goto out_overflow;
+ p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
+ res->impl_id->date.nseconds = be32_to_cpup(p);
+
+ /* if there's more than one entry, ignore the rest */
+ }
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index d05024a..5462225 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -809,6 +809,14 @@ static int nfs_show_stats(struct seq_file *m, struct dentry *root)
seq_printf(m, "\n\tage:\t%lu", (jiffies - nfss->mount_time) / HZ);
+ if (nfss->nfs_client && nfss->nfs_client->impl_id) {
+ struct nfs41_impl_id *impl_id = nfss->nfs_client->impl_id;
+ seq_printf(m, "\n\timpl_id:\tname='%s',domain='%s',"
+ "date='%llu,%u'",
+ impl_id->name, impl_id->domain,
+ impl_id->date.seconds, impl_id->date.nseconds);
+ }
+
seq_printf(m, "\n\tcaps:\t");
seq_printf(m, "caps=0x%x", nfss->caps);
seq_printf(m, ",wtmult=%u", nfss->wtmult);
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 3bf4766..03d0b91 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -18,6 +18,7 @@ struct nfs4_sequence_res;
struct nfs_server;
struct nfs4_minor_version_ops;
struct server_scope;
+struct nfs41_impl_id;
/*
* The nfs_client identifies our client state to the server.
@@ -86,6 +87,7 @@ struct nfs_client {
#endif
struct server_scope *server_scope; /* from exchange_id */
+ struct nfs41_impl_id *impl_id; /* from exchange_id */
struct net *net;
};
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index adbc84a..046c1bf 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1054,14 +1054,6 @@ struct nfstime4 {
};
#ifdef CONFIG_NFS_V4_1
-struct nfs_impl_id4 {
- u32 domain_len;
- char *domain;
- u32 name_len;
- char *name;
- struct nfstime4 date;
-};
-
#define NFS4_EXCHANGE_ID_LEN (48)
struct nfs41_exchange_id_args {
struct nfs_client *client;
@@ -1082,10 +1074,17 @@ struct server_scope {
char server_scope[NFS4_OPAQUE_LIMIT];
};
+struct nfs41_impl_id {
+ char domain[NFS4_OPAQUE_LIMIT + 1];
+ char name[NFS4_OPAQUE_LIMIT + 1];
+ struct nfstime4 date;
+};
+
struct nfs41_exchange_id_res {
struct nfs_client *client;
u32 flags;
struct server_scope *server_scope;
+ struct nfs41_impl_id *impl_id;
};
struct nfs41_create_session_args {
--
1.7.4.4
--
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