From: Olga Kornievskaia <aglo@xxxxxxxxxxxxxx>
The cl_chatty flag alows us to control whether a given rpc client leaves
"server X not responding, timed out"
messages in the syslog. Such messages make sense for ordinary nfs
clients (where an unresponsive server means applications on the
mountpoint are probably hanging), but not for the callback client (which
can fail more commonly, with the only result just of disabling some
optimizations).
Previously cl_chatty was removed, do to lack of users; reinstate it, and
use it for the nfsd's callback client.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
fs/nfsd/nfs4callback.c | 2 +-
include/linux/sunrpc/clnt.h | 4 +++-
net/sunrpc/clnt.c | 16 +++++++++++-----
3 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 4d4760e..702fa57 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -381,7 +381,7 @@ static int do_probe_callback(void *data)
.program = &cb_program,
.version = nfs_cb_version[1]->number,
.authflavor = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */
- .flags = (RPC_CLNT_CREATE_NOPING),
+ .flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
};
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index 6fff7f8..764fd4c 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -42,7 +42,8 @@ struct rpc_clnt {
unsigned int cl_softrtry : 1,/* soft timeouts */
cl_discrtry : 1,/* disconnect before retry */
- cl_autobind : 1;/* use getport() */
+ cl_autobind : 1,/* use getport() */
+ cl_chatty : 1;/* be verbose */
struct rpc_rtt * cl_rtt; /* RTO estimator data */
const struct rpc_timeout *cl_timeout; /* Timeout strategy */
@@ -114,6 +115,7 @@ struct rpc_create_args {
#define RPC_CLNT_CREATE_NONPRIVPORT (1UL << 3)
#define RPC_CLNT_CREATE_NOPING (1UL << 4)
#define RPC_CLNT_CREATE_DISCRTRY (1UL << 5)
+#define RPC_CLNT_CREATE_QUIET (1UL << 6)
struct rpc_clnt *rpc_create(struct rpc_create_args *args);
struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 8945307..08ec845 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -324,6 +324,8 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
clnt->cl_autobind = 1;
if (args->flags & RPC_CLNT_CREATE_DISCRTRY)
clnt->cl_discrtry = 1;
+ if (!(args->flags & RPC_CLNT_CREATE_QUIET))
+ clnt->cl_chatty = 1;
return clnt;
}
@@ -1132,7 +1134,8 @@ call_status(struct rpc_task *task)
rpc_exit(task, status);
break;
default:
- printk("%s: RPC call returned error %d\n",
+ if (clnt->cl_chatty)
+ printk("%s: RPC call returned error %d\n",
clnt->cl_protname, -status);
rpc_exit(task, status);
}
@@ -1157,7 +1160,8 @@ call_timeout(struct rpc_task *task)
task->tk_timeouts++;
if (RPC_IS_SOFT(task)) {
- printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s not responding, timed out\n",
clnt->cl_protname, clnt->cl_server);
rpc_exit(task, -EIO);
return;
@@ -1165,7 +1169,8 @@ call_timeout(struct rpc_task *task)
if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
task->tk_flags |= RPC_CALL_MAJORSEEN;
- printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s not responding, still trying\n",
clnt->cl_protname, clnt->cl_server);
}
rpc_force_rebind(clnt);
@@ -1196,8 +1201,9 @@ call_decode(struct rpc_task *task)
task->tk_pid, task->tk_status);
if (task->tk_flags & RPC_CALL_MAJORSEEN) {
- printk(KERN_NOTICE "%s: server %s OK\n",
- clnt->cl_protname, clnt->cl_server);
+ if (clnt->cl_chatty)
+ printk(KERN_NOTICE "%s: server %s OK\n",
+ clnt->cl_protname, clnt->cl_server);
task->tk_flags &= ~RPC_CALL_MAJORSEEN;
}
--
1.5.5.rc1
>From aa856d8b74879d207b35188724917cc426f2b152 Mon Sep 17 00:00:00 2001
From: Olga Kornievskaia <aglo@xxxxxxxxxxxxxx>
Date: Sun, 20 Jan 2008 22:25:28 -0500
Subject: [PATCH 2/6] rpc: timeout patch
When a client gss upcall times out, we currently give a mesage reminding
the user to check whether gssd is running.
Currently gssd only listens on pipes under nfs/. We expect to modify it
so it treats all clients the same regardless of protocol (as it probably
should have before), and new functionality may depend on that. So
people may need to upgrade gssd to get such new functionality.
So it would be helpful if the error message specified which pipe exactly
the upcall was failing on, and suggested that the problem could be due
to an outdated gssd (not just a non-existant gssd).
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
net/sunrpc/auth_gss/auth_gss.c | 42 +++++++++++++++++++++++++--------------
1 files changed, 27 insertions(+), 15 deletions(-)
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index cc12d5f..c3ca6f0 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -584,22 +584,34 @@ gss_pipe_destroy_msg(struct rpc_pipe_msg *msg)
{
struct gss_upcall_msg *gss_msg = container_of(msg, struct gss_upcall_msg, msg);
static unsigned long ratelimit;
+ unsigned long now = jiffies;
+ struct path path = {
+ .dentry = gss_msg->auth->dentry,
+ .mnt = gss_msg->auth->client->cl_vfsmnt,
+ };
+ char name[128], *p;
- if (msg->errno < 0) {
- dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n",
- gss_msg);
- atomic_inc(&gss_msg->count);
- gss_unhash_msg(gss_msg);
- if (msg->errno == -ETIMEDOUT) {
- unsigned long now = jiffies;
- if (time_after(now, ratelimit)) {
- printk(KERN_WARNING "RPC: AUTH_GSS upcall timed out.\n"
- "Please check user daemon is running!\n");
- ratelimit = now + 15*HZ;
- }
- }
- gss_release_msg(gss_msg);
- }
+ if (msg->errno >= 0)
+ return;
+
+ dprintk("RPC: gss_pipe_destroy_msg releasing msg %p\n", gss_msg);
+ atomic_inc(&gss_msg->count);
+ gss_unhash_msg(gss_msg);
+
+ if (msg->errno != -ETIMEDOUT)
+ goto out;
+
+ if (!time_after(now, ratelimit))
+ goto out;
+
+ p = d_path(&path, name, 128);
+ printk(KERN_WARNING "RPC: AUTH_GSS upcall to <rpc_pipefs_dir>%s "
+ "timed out.\n Please check user daemon is "
+ "up-to-date and running!\n", p ? p : "<null>");
+ ratelimit = now + 15*HZ;
+
+out:
+ gss_release_msg(gss_msg);
}
/*
--
1.5.5.rc1
>From 7e460fc42e3654aa5c7113ac29e349857617bd11 Mon Sep 17 00:00:00 2001
From: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
Date: Tue, 27 May 2008 16:31:41 -0400
Subject: [PATCH 3/6] rpc: eliminate unused variable in auth_gss upcall code
Also, a minor comment grammar fix in the same file.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
net/sunrpc/auth_gss/auth_gss.c | 4 +---
1 files changed, 1 insertions(+), 3 deletions(-)
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index c3ca6f0..92a820e 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -272,7 +272,7 @@ __gss_find_upcall(struct rpc_inode *rpci, uid_t uid)
return NULL;
}
-/* Try to add a upcall to the pipefs queue.
+/* Try to add an upcall to the pipefs queue.
* If an upcall owned by our uid already exists, then we return a reference
* to that upcall instead of adding the new upcall.
*/
@@ -493,7 +493,6 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
{
const void *p, *end;
void *buf;
- struct rpc_clnt *clnt;
struct gss_upcall_msg *gss_msg;
struct inode *inode = filp->f_path.dentry->d_inode;
struct gss_cl_ctx *ctx;
@@ -507,7 +506,6 @@ gss_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
if (!buf)
goto out;
- clnt = RPC_I(inode)->private;
err = -EFAULT;
if (copy_from_user(buf, src, mlen))
goto err;
--
1.5.5.rc1
>From dedd9b414b8d4e3398579f21b694208e694a7ae8 Mon Sep 17 00:00:00 2001
From: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
Date: Tue, 20 May 2008 10:42:01 -0400
Subject: [PATCH 4/6] rpc: remove some unused macros
There used to be a print_hexl() function that used isprint(), now gone.
I don't know why NFS_NGROUPS and CA_RUN_AS_MACHINE were here.
I also don't know why another #define that's actually used was marked
"unused".
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
net/sunrpc/auth_gss/auth_gss.c | 13 +------------
1 files changed, 1 insertions(+), 12 deletions(-)
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 92a820e..ff0c2a4 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -63,22 +63,11 @@ static const struct rpc_credops gss_nullops;
# define RPCDBG_FACILITY RPCDBG_AUTH
#endif
-#define NFS_NGROUPS 16
-
-#define GSS_CRED_SLACK 1024 /* XXX: unused */
+#define GSS_CRED_SLACK 1024
/* length of a krb5 verifier (48), plus data added before arguments when
* using integrity (two 4-byte integers): */
#define GSS_VERF_SLACK 100
-/* XXX this define must match the gssd define
-* as it is passed to gssd to signal the use of
-* machine creds should be part of the shared rpc interface */
-
-#define CA_RUN_AS_MACHINE 0x00000200
-
-/* dump the buffer in `emacs-hexl' style */
-#define isprint(c) ((c > 0x1f) && (c < 0x7f))
-
struct gss_auth {
struct kref kref;
struct rpc_auth rpc_auth;
--
1.5.5.rc1
>From 0a0d4e3e56351897b2a191e515cf9290bef35430 Mon Sep 17 00:00:00 2001
From: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
Date: Tue, 27 May 2008 16:21:01 -0400
Subject: [PATCH 5/6] rpc: minor cleanup of scheduler callback code
Try to make the comment here a little more clear and concise.
Also, this macro definition seems unnecessary.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
include/linux/sunrpc/sched.h | 1 -
net/sunrpc/sched.c | 14 +++++---------
2 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
index d1a5c8c..64981a2 100644
--- a/include/linux/sunrpc/sched.h
+++ b/include/linux/sunrpc/sched.h
@@ -135,7 +135,6 @@ struct rpc_task_setup {
#define RPC_IS_SWAPPER(t) ((t)->tk_flags & RPC_TASK_SWAPPER)
#define RPC_DO_ROOTOVERRIDE(t) ((t)->tk_flags & RPC_TASK_ROOTCREDS)
#define RPC_ASSASSINATED(t) ((t)->tk_flags & RPC_TASK_KILLED)
-#define RPC_DO_CALLBACK(t) ((t)->tk_callback != NULL)
#define RPC_IS_SOFT(t) ((t)->tk_flags & RPC_TASK_SOFT)
#define RPC_TASK_RUNNING 0
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index 6eab9bf..6288af0 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -626,19 +626,15 @@ static void __rpc_execute(struct rpc_task *task)
/*
* Execute any pending callback.
*/
- if (RPC_DO_CALLBACK(task)) {
- /* Define a callback save pointer */
+ if (task->tk_callback) {
void (*save_callback)(struct rpc_task *);
/*
- * If a callback exists, save it, reset it,
- * call it.
- * The save is needed to stop from resetting
- * another callback set within the callback handler
- * - Dave
+ * We set tk_callback to NULL before calling it,
+ * in case it sets the tk_callback field itself:
*/
- save_callback=task->tk_callback;
- task->tk_callback=NULL;
+ save_callback = task->tk_callback;
+ task->tk_callback = NULL;
save_callback(task);
}
--
1.5.5.rc1
>From 232263856bc583c04b151bd275f2cdf145b384a0 Mon Sep 17 00:00:00 2001
From: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
Date: Fri, 9 May 2008 15:10:56 -0700
Subject: [PATCH 6/6] nfs: Fix misparsing of nfsv4 fs_locations attribute
The code incorrectly assumes here that the server name (or ip address)
is null-terminated. This can cause referrals to fail in some cases.
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxxxxxx>
---
fs/nfs/nfs4namespace.c | 34 ++++++++++------------------------
1 files changed, 10 insertions(+), 24 deletions(-)
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index b112857..2f3eabe 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -93,23 +93,6 @@ static int nfs4_validate_fspath(const struct vfsmount *mnt_parent,
return 0;
}
-/*
- * Check if the string represents a "valid" IPv4 address
- */
-static inline int valid_ipaddr4(const char *buf)
-{
- int rc, count, in[4];
-
- rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
- if (rc != 4)
- return -EINVAL;
- for (count = 0; count < 4; count++) {
- if (in[count] > 255)
- return -EINVAL;
- }
- return 0;
-}
-
/**
* nfs_follow_referral - set up mountpoint when hitting a referral on moved error
* @mnt_parent - mountpoint of parent directory
@@ -172,19 +155,20 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
s = 0;
while (s < location->nservers) {
+ const struct nfs4_string *buf = &location->servers[s];
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_port = htons(NFS_PORT),
};
+ u8 *ip = (u8 *)addr.sin_addr.s_addr;
- if (location->servers[s].len <= 0 ||
- valid_ipaddr4(location->servers[s].data) < 0) {
- s++;
- continue;
- }
+ if (buf->len <= 0 || buf->len >= PAGE_SIZE)
+ goto next;
+ if (!in4_pton(buf->data, buf->len, ip, '\0', NULL))
+ goto next;
- mountdata.hostname = location->servers[s].data;
- addr.sin_addr.s_addr = in_aton(mountdata.hostname),
+ mountdata.hostname = kmalloc(buf->len + 1, GFP_KERNEL);
+ mountdata.hostname[buf->len] = 0;
mountdata.addr = (struct sockaddr *)&addr;
mountdata.addrlen = sizeof(addr);
@@ -193,9 +177,11 @@ static struct vfsmount *nfs_follow_referral(const struct vfsmount *mnt_parent,
mountdata.mnt_path);
mnt = vfs_kern_mount(&nfs4_referral_fs_type, 0, page, &mountdata);
+ kfree(mountdata.hostname);
if (!IS_ERR(mnt)) {
break;
}
+next:
s++;
}
loc++;
--
1.5.5.rc1
--
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