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NSM: Generate NSMPROC_MON's "priv" argument when nsm_handle is created

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Introduce a new data type, used by both the in-kernel NLM and NSM
implementations, that is used to manage the opaque "priv" argument
for the NSMPROC_MON and NLMPROC_SM_NOTIFY calls.

Construct the "priv" cookie when the nsm_handle is created.

The nsm_init_private() function may look a little strange, but it is
roughly equivalent to how the XDR encoder formed the "priv" argument.
It's going to go away soon.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Chuck Lever 2008-12-05 19:03:16 -05:00 committed by J. Bruce Fields
parent 05f3a9af58
commit 7e44d3bea2
4 changed files with 23 additions and 1 deletions
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16
fs/lockd/mon.c
View File

@ -201,6 +201,21 @@ void nsm_unmonitor(const struct nlm_host *host)
}
}
/*
* Construct a unique cookie to match this nsm_handle to this monitored
* host. It is passed to the local rpc.statd via NSMPROC_MON, and
* returned via NLMPROC_SM_NOTIFY, in the "priv" field of these
* requests.
*
* Linux provides the raw IP address of the monitored host,
* left in network byte order.
*/
static void nsm_init_private(struct nsm_handle *nsm)
{
__be32 *p = (__be32 *)&nsm->sm_priv.data;
*p = nsm_addr_in(nsm)->sin_addr.s_addr;
}
/**
* nsm_find - Find or create a cached nsm_handle
* @sap: pointer to socket address of handle to find
@ -271,6 +286,7 @@ struct nsm_handle *nsm_find(const struct sockaddr *sap, const size_t salen,
nsm->sm_name = (char *) (nsm + 1);
memcpy(nsm->sm_name, hostname, hostname_len);
nsm->sm_name[hostname_len] = '\0';
nsm_init_private(nsm);
nsm_display_address((struct sockaddr *)&nsm->sm_addr,
nsm->sm_addrbuf, sizeof(nsm->sm_addrbuf));
atomic_set(&nsm->sm_count, 1);

1
include/linux/lockd/lockd.h
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@ -85,6 +85,7 @@ struct nsm_handle {
size_t sm_addrlen;
unsigned int sm_monitored : 1,
sm_sticky : 1; /* don't unmonitor */
struct nsm_private sm_priv;
char sm_addrbuf[NSM_ADDRBUF];
};

1
include/linux/lockd/sm_inter.h
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@ -10,7 +10,6 @@
#define LINUX_LOCKD_SM_INTER_H
#define SM_MAXSTRLEN 1024
#define SM_PRIV_SIZE 16
extern int nsm_local_state;

6
include/linux/lockd/xdr.h
View File

@ -13,6 +13,12 @@
#include <linux/nfs.h>
#include <linux/sunrpc/xdr.h>
#define SM_PRIV_SIZE 16
struct nsm_private {
unsigned char data[SM_PRIV_SIZE];
};
struct svc_rqst;
#define NLM_MAXCOOKIELEN 32