knfsd: remove special handling for SIGHUP

The special handling for SIGHUP in knfsd is a holdover from much
earlier versions of Linux where reloading the export table was
more expensive. That facility is not really needed anymore and
to my knowledge, is seldom-used.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 8 insertions, 25 deletions

diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 929af233510e..6339cb70a08d 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -44,11 +44,6 @@
  * when not handling a request. i.e. when waiting
  */
 #define SHUTDOWN_SIGS   (sigmask(SIGKILL) | sigmask(SIGHUP) | sigmask(SIGINT) | sigmask(SIGQUIT))
-/* if the last thread dies with SIGHUP, then the exports table is
- * left unchanged ( like 2.4-{0-9} ).  Any other signal will clear
- * the exports table (like 2.2).
- */
-#define SIG_NOCLEAN     SIGHUP
 
 extern struct svc_program       nfsd_program;
 static void                     nfsd(struct svc_rqst *rqstp);
@@ -175,7 +170,6 @@ int nfsd_nrthreads(void)
                 return nfsd_serv->sv_nrthreads;
 }
 
-static int killsig;     /* signal that was used to kill last nfsd */
 static void nfsd_last_thread(struct svc_serv *serv)
 {
         /* When last nfsd thread exits we need to do some clean-up */
@@ -186,11 +180,9 @@ static void nfsd_last_thread(struct svc_serv *serv)
         nfsd_racache_shutdown();
         nfs4_state_shutdown();
 
-        printk(KERN_WARNING "nfsd: last server has exited\n");
-        if (killsig != SIG_NOCLEAN) {
-                printk(KERN_WARNING "nfsd: unexporting all filesystems\n");
-                nfsd_export_flush();
-        }
+        printk(KERN_WARNING "nfsd: last server has exited, flushing export "
+                            "cache\n");
+        nfsd_export_flush();
 }
 
 void nfsd_reset_versions(void)
@@ -242,10 +234,9 @@ int nfsd_create_serv(void)
         }
 
         atomic_set(&nfsd_busy, 0);
-        nfsd_serv = svc_create_pooled(&nfsd_program,
-                                      nfsd_max_blksize,
-                                      nfsd_last_thread,
-                                      nfsd, SIG_NOCLEAN, THIS_MODULE);
+        nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
+                                      nfsd_last_thread, nfsd, SIGINT,
+                                      THIS_MODULE);
         if (nfsd_serv == NULL)
                 err = -ENOMEM;
 
@@ -490,17 +481,9 @@ nfsd(struct svc_rqst *rqstp)
                 atomic_dec(&nfsd_busy);
         }
 
-        if (err != -EINTR) {
+        if (err != -EINTR)
                 printk(KERN_WARNING "nfsd: terminating on error %d\n", -err);
-        } else {
-                unsigned int    signo;
-
-                for (signo = 1; signo <= _NSIG; signo++)
-                        if (sigismember(&current->pending.signal, signo) &&
-                            !sigismember(&current->blocked, signo))
-                                break;
-                killsig = signo;
-        }
+
         /* Clear signals before calling svc_exit_thread() */
         flush_signals(current);