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[PATCH] knfsd: add svc_get

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add svc_get() for those occasions when we need to temporarily bump up
svc_serv->sv_nrthreads as a pseudo refcount.

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Greg Banks
2006-10-02 02:17:58 -07:00
committed by Linus Torvalds
parent 3262c816a3
commit 9a24ab5749
2 changed files with 12 additions and 1 deletions
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2
fs/nfsd/nfssvc.c
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@@ -200,7 +200,7 @@ int nfsd_create_serv(void)
int err = 0; int err = 0;
lock_kernel(); lock_kernel();
if (nfsd_serv) { if (nfsd_serv) {
nfsd_serv->sv_nrthreads++; svc_get(nfsd_serv);
unlock_kernel(); unlock_kernel();
return 0; return 0;
} }

11
include/linux/sunrpc/svc.h
View File

@@ -70,6 +70,17 @@ struct svc_serv {
*/ */
}; };
/*
* We use sv_nrthreads as a reference count. svc_destroy() drops
* this refcount, so we need to bump it up around operations that
* change the number of threads. Horrible, but there it is.
* Should be called with the BKL held.
*/
static inline void svc_get(struct svc_serv *serv)
{
serv->sv_nrthreads++;
}
/* /*
* Maximum payload size supported by a kernel RPC server. * Maximum payload size supported by a kernel RPC server.
* This is use to determine the max number of pages nfsd is * This is use to determine the max number of pages nfsd is