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nfsd: just keep single lockd reference for nfsd

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Right now, nfsd keeps a lockd reference for each socket that it has
open. This is unnecessary and complicates the error handling on
startup and shutdown. Change it to just do a lockd_up when starting
the first nfsd thread just do a single lockd_down when taking down the
last nfsd thread. Because of the strange way the sv_count is handled
this requires an extra flag to tell whether the nfsd_serv holds a
reference for lockd or not.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Jeff Layton 2010-07-20 14:10:22 -04:00 committed by J. Bruce Fields
parent 628b368728
commit ac77efbe2b
2 changed files with 14 additions and 21 deletions
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10
fs/nfsd/nfsctl.c
View File

@ -949,15 +949,8 @@ static ssize_t __write_ports_addfd(char *buf)
if (err != 0)
return err;
err = lockd_up();
if (err != 0) {
svc_destroy(nfsd_serv);
return err;
}
err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
if (err < 0) {
lockd_down();
svc_destroy(nfsd_serv);
return err;
}
@ -982,9 +975,6 @@ static ssize_t __write_ports_delfd(char *buf)
if (nfsd_serv != NULL)
len = svc_sock_names(nfsd_serv, buf,
SIMPLE_TRANSACTION_LIMIT, toclose);
if (len >= 0)
lockd_down();
kfree(toclose);
return len;
}

25
fs/nfsd/nfssvc.c
View File

@ -186,8 +186,16 @@ static int nfsd_startup(unsigned short port, int nrservs)
{
int ret;
ret = lockd_up();
if (ret)
return ret;
ret = nfs4_state_start();
if (ret)
goto out_lockd;
nfsd_up = true;
return 0;
out_lockd:
lockd_down();
return ret;
}
@ -201,6 +209,7 @@ static void nfsd_shutdown(void)
*/
if (!nfsd_up)
return;
lockd_down();
nfs4_state_shutdown();
nfsd_up = false;
}
@ -208,9 +217,6 @@ static void nfsd_shutdown(void)
static void nfsd_last_thread(struct svc_serv *serv)
{
/* When last nfsd thread exits we need to do some clean-up */
struct svc_xprt *xprt;
list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list)
lockd_down();
nfsd_serv = NULL;
nfsd_racache_shutdown();
nfsd_shutdown();
@ -310,19 +316,11 @@ static int nfsd_init_socks(int port)
if (error < 0)
return error;
error = lockd_up();
if (error < 0)
return error;
error = svc_create_xprt(nfsd_serv, "tcp", PF_INET, port,
SVC_SOCK_DEFAULTS);
if (error < 0)
return error;
error = lockd_up();
if (error < 0)
return error;
return 0;
}
@ -400,6 +398,11 @@ int nfsd_set_nrthreads(int n, int *nthreads)
return err;
}
/*
* Adjust the number of threads and return the new number of threads.
* This is also the function that starts the server if necessary, if
* this is the first time nrservs is nonzero.
*/
int
nfsd_svc(unsigned short port, int nrservs)
{