xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / bsd / nfs / nfs_lock.c

diff --git a/bsd/nfs/nfs_lock.c b/bsd/nfs/nfs_lock.c
index f76a9b6d0b9b863703405fd47a5357ef21466d4c..4b0d196312b6165e1284806c450a95f02b5f7b8a 100644 (file)
--- a/bsd/nfs/nfs_lock.c
+++ b/bsd/nfs/nfs_lock.c
@@ -1,8 +1,8 @@
 /*
 /*

- * Copyright (c) 2002-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2002-2016 Apple Inc. All rights reserved.

  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

- * 
+ *

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in


@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.

- * 
+ *

  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.

- * 
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*-
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*-


@@ -55,17 +55,20 @@
  *      from BSDI nfs_lock.c,v 2.4 1998/12/14 23:49:56 jch Exp
  */
 
  *      from BSDI nfs_lock.c,v 2.4 1998/12/14 23:49:56 jch Exp
  */
 

+#include <nfs/nfs_conf.h>
+#if CONFIG_NFS_CLIENT
+

 #include <sys/cdefs.h>
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/fcntl.h>
 #include <sys/cdefs.h>
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/fcntl.h>

-#include <sys/kernel.h>                /* for hz */
+#include <sys/kernel.h>         /* for hz */

 #include <sys/file_internal.h>
 #include <sys/malloc.h>
 #include <sys/file_internal.h>
 #include <sys/malloc.h>

-#include <sys/lockf.h>         /* for hz */ /* Must come after sys/malloc.h */
+#include <sys/lockf.h>          /* for hz */ /* Must come after sys/malloc.h */

 #include <sys/kpi_mbuf.h>
 #include <sys/mount_internal.h>
 #include <sys/kpi_mbuf.h>
 #include <sys/mount_internal.h>

-#include <sys/proc_internal.h> /* for p_start */
+#include <sys/proc_internal.h>  /* for p_start */

 #include <sys/kauth.h>
 #include <sys/resourcevar.h>
 #include <sys/socket.h>
 #include <sys/kauth.h>
 #include <sys/resourcevar.h>
 #include <sys/socket.h>


@@ -103,7 +106,7 @@ static uint64_t nfs_lockxid = 0;
 static LOCKD_MSG_QUEUE nfs_pendlockq;
 
 /* list of mounts that are (potentially) making lockd requests */
 static LOCKD_MSG_QUEUE nfs_pendlockq;
 
 /* list of mounts that are (potentially) making lockd requests */

-TAILQ_HEAD(nfs_lockd_mount_list,nfsmount) nfs_lockd_mount_list;
+TAILQ_HEAD(nfs_lockd_mount_list, nfsmount) nfs_lockd_mount_list;

 
 static lck_grp_t *nfs_lock_lck_grp;
 static lck_mtx_t *nfs_lock_mutex;
 
 static lck_grp_t *nfs_lock_lck_grp;
 static lck_mtx_t *nfs_lock_mutex;


@@ -155,18 +158,27 @@ nfs_lockd_mount_unregister(struct nfsmount *nmp)
        kern_return_t kr;
 
        lck_mtx_lock(nfs_lock_mutex);
        kern_return_t kr;
 
        lck_mtx_lock(nfs_lock_mutex);

+       if (nmp->nm_ldlink.tqe_next == NFSNOLIST) {
+               lck_mtx_unlock(nfs_lock_mutex);
+               return;
+       }
+

        TAILQ_REMOVE(&nfs_lockd_mount_list, nmp, nm_ldlink);
        TAILQ_REMOVE(&nfs_lockd_mount_list, nmp, nm_ldlink);

+       nmp->nm_ldlink.tqe_next = NFSNOLIST;
+

        nfs_lockd_mounts--;
 
        /* send a shutdown request if there are no more lockd mounts */
        send_shutdown = ((nfs_lockd_mounts == 0) && nfs_lockd_request_sent);
        nfs_lockd_mounts--;
 
        /* send a shutdown request if there are no more lockd mounts */
        send_shutdown = ((nfs_lockd_mounts == 0) && nfs_lockd_request_sent);

-       if (send_shutdown)
+       if (send_shutdown) {

                nfs_lockd_request_sent = 0;
                nfs_lockd_request_sent = 0;

+       }

 
        lck_mtx_unlock(nfs_lock_mutex);
 
 
        lck_mtx_unlock(nfs_lock_mutex);
 

-       if (!send_shutdown)
+       if (!send_shutdown) {

                return;
                return;

+       }

 
        /*
         * Let lockd know that it is no longer needed for any NFS mounts
 
        /*
         * Let lockd know that it is no longer needed for any NFS mounts


@@ -174,14 +186,15 @@ nfs_lockd_mount_unregister(struct nfsmount *nmp)
        kr = host_get_lockd_port(host_priv_self(), &lockd_port);
        if ((kr != KERN_SUCCESS) || !IPC_PORT_VALID(lockd_port)) {
                printf("nfs_lockd_mount_change: shutdown couldn't get port, kr %d, port %s\n",
        kr = host_get_lockd_port(host_priv_self(), &lockd_port);
        if ((kr != KERN_SUCCESS) || !IPC_PORT_VALID(lockd_port)) {
                printf("nfs_lockd_mount_change: shutdown couldn't get port, kr %d, port %s\n",

-                       kr, (lockd_port == IPC_PORT_NULL) ? "NULL" :
-                       (lockd_port == IPC_PORT_DEAD) ? "DEAD" : "VALID");
+                   kr, (lockd_port == IPC_PORT_NULL) ? "NULL" :
+                   (lockd_port == IPC_PORT_DEAD) ? "DEAD" : "VALID");

                return;
        }
 
        kr = lockd_shutdown(lockd_port);
                return;
        }
 
        kr = lockd_shutdown(lockd_port);

-       if (kr != KERN_SUCCESS)
+       if (kr != KERN_SUCCESS) {

                printf("nfs_lockd_mount_change: shutdown %d\n", kr);
                printf("nfs_lockd_mount_change: shutdown %d\n", kr);

+       }

 
        ipc_port_release_send(lockd_port);
 }
 
        ipc_port_release_send(lockd_port);
 }


@@ -240,10 +253,12 @@ nfs_lockdmsg_find_by_xid(uint64_t lockxid)
        LOCKD_MSG_REQUEST *mr;
 
        TAILQ_FOREACH(mr, &nfs_pendlockq, lmr_next) {
        LOCKD_MSG_REQUEST *mr;
 
        TAILQ_FOREACH(mr, &nfs_pendlockq, lmr_next) {

-               if (mr->lmr_msg.lm_xid == lockxid)
+               if (mr->lmr_msg.lm_xid == lockxid) {

                        return mr;
                        return mr;

-               if (mr->lmr_msg.lm_xid > lockxid)
+               }
+               if (mr->lmr_msg.lm_xid > lockxid) {

                        return NULL;
                        return NULL;

+               }

        }
        return mr;
 }
        }
        return mr;
 }


@@ -263,18 +278,24 @@ nfs_lockdmsg_find_by_xid(uint64_t lockxid)
 int
 nfs_lockdmsg_compare_to_answer(LOCKD_MSG_REQUEST *msgreq, struct lockd_ans *ansp)
 {
 int
 nfs_lockdmsg_compare_to_answer(LOCKD_MSG_REQUEST *msgreq, struct lockd_ans *ansp)
 {

-       if (!(ansp->la_flags & LOCKD_ANS_LOCK_INFO))
+       if (!(ansp->la_flags & LOCKD_ANS_LOCK_INFO)) {

                return 1;
                return 1;

-       if (msgreq->lmr_msg.lm_fl.l_pid != ansp->la_pid)
+       }
+       if (msgreq->lmr_msg.lm_fl.l_pid != ansp->la_pid) {

                return 1;
                return 1;

-       if (msgreq->lmr_msg.lm_fl.l_start != ansp->la_start)
+       }
+       if (msgreq->lmr_msg.lm_fl.l_start != ansp->la_start) {

                return 1;
                return 1;

-       if (msgreq->lmr_msg.lm_fl.l_len != ansp->la_len)
+       }
+       if (msgreq->lmr_msg.lm_fl.l_len != ansp->la_len) {

                return 1;
                return 1;

-       if (msgreq->lmr_msg.lm_fh_len != ansp->la_fh_len)
+       }
+       if (msgreq->lmr_msg.lm_fh_len != ansp->la_fh_len) {

                return 1;
                return 1;

-       if (bcmp(msgreq->lmr_msg.lm_fh, ansp->la_fh, ansp->la_fh_len))
+       }
+       if (bcmp(msgreq->lmr_msg.lm_fh, ansp->la_fh, ansp->la_fh_len)) {

                return 1;
                return 1;

+       }

        return 0;
 }
 
        return 0;
 }
 


@@ -298,11 +319,13 @@ nfs_lockdmsg_find_by_answer(struct lockd_ans *ansp)
 {
        LOCKD_MSG_REQUEST *mr;
 
 {
        LOCKD_MSG_REQUEST *mr;
 

-       if (!(ansp->la_flags & LOCKD_ANS_LOCK_INFO))
+       if (!(ansp->la_flags & LOCKD_ANS_LOCK_INFO)) {

                return NULL;
                return NULL;

+       }

        TAILQ_FOREACH(mr, &nfs_pendlockq, lmr_next) {
        TAILQ_FOREACH(mr, &nfs_pendlockq, lmr_next) {

-               if (!nfs_lockdmsg_compare_to_answer(mr, ansp))
+               if (!nfs_lockdmsg_compare_to_answer(mr, ansp)) {

                        break;
                        break;

+               }

        }
        return mr;
 }
        }
        return mr;
 }


@@ -332,10 +355,11 @@ nfs_lockxid_get(void)
        /* make sure we get a unique xid */
        do {
                /* Skip zero xid if it should ever happen.  */
        /* make sure we get a unique xid */
        do {
                /* Skip zero xid if it should ever happen.  */

-               if (++nfs_lockxid == 0)
+               if (++nfs_lockxid == 0) {

                        nfs_lockxid++;
                        nfs_lockxid++;

+               }

                if (!(mr = TAILQ_LAST(&nfs_pendlockq, nfs_lock_msg_queue)) ||
                if (!(mr = TAILQ_LAST(&nfs_pendlockq, nfs_lock_msg_queue)) ||

-                    (mr->lmr_msg.lm_xid < nfs_lockxid)) {
+                   (mr->lmr_msg.lm_xid < nfs_lockxid)) {

                        /* fast path: empty queue or new largest xid */
                        break;
                }
                        /* fast path: empty queue or new largest xid */
                        break;
                }


@@ -355,8 +379,9 @@ nfs_lockd_send_request(LOCKD_MSG *msg, int interruptable)
        mach_port_t lockd_port = IPC_PORT_NULL;
 
        kr = host_get_lockd_port(host_priv_self(), &lockd_port);
        mach_port_t lockd_port = IPC_PORT_NULL;
 
        kr = host_get_lockd_port(host_priv_self(), &lockd_port);

-       if (kr != KERN_SUCCESS || !IPC_PORT_VALID(lockd_port))
-               return (ENOTSUP);
+       if (kr != KERN_SUCCESS || !IPC_PORT_VALID(lockd_port)) {
+               return ENOTSUP;
+       }

 
        do {
                /* In the kernel all mach messaging is interruptable */
 
        do {
                /* In the kernel all mach messaging is interruptable */


@@ -375,26 +400,25 @@ nfs_lockd_send_request(LOCKD_MSG *msg, int interruptable)
                                (uint32_t *)&msg->lm_cred,
                                msg->lm_fh_len,
                                msg->lm_fh);
                                (uint32_t *)&msg->lm_cred,
                                msg->lm_fh_len,
                                msg->lm_fh);

-                       if (kr != KERN_SUCCESS)
+                       if (kr != KERN_SUCCESS) {

                                printf("lockd_request received %d!\n", kr);
                                printf("lockd_request received %d!\n", kr);

+                       }

                } while (!interruptable && kr == MACH_SEND_INTERRUPTED);
        } while (kr == MIG_SERVER_DIED && retries++ < MACH_MAX_TRIES);
 
        ipc_port_release_send(lockd_port);
        switch (kr) {
                } while (!interruptable && kr == MACH_SEND_INTERRUPTED);
        } while (kr == MIG_SERVER_DIED && retries++ < MACH_MAX_TRIES);
 
        ipc_port_release_send(lockd_port);
        switch (kr) {

-       case MACH_SEND_INTERRUPTED: 
-               return (EINTR);
+       case MACH_SEND_INTERRUPTED:
+               return EINTR;

        default:
                /*
                 * Other MACH or MIG errors we will retry. Eventually
        default:
                /*
                 * Other MACH or MIG errors we will retry. Eventually

-                * we will call nfs_down and allow the user to disable 
+                * we will call nfs_down and allow the user to disable

                 * locking.
                 */
                 * locking.
                 */

-               return (EAGAIN);
+               return EAGAIN;

        }
        }

-       return (kr);

 }
 }

-                               

 
 /*
  * NFS advisory byte-level locks (client)
 
 /*
  * NFS advisory byte-level locks (client)


@@ -412,23 +436,26 @@ nfs3_lockd_request(
        int interruptable, slpflag;
        struct nfsmount *nmp;
        struct timeval now;
        int interruptable, slpflag;
        struct nfsmount *nmp;
        struct timeval now;

-       int timeo, starttime, endtime, lastmsg, wentdown = 0;
+       int timeo, wentdown = 0;
+       long starttime, endtime, lastmsg;

        struct timespec ts;
        struct sockaddr *saddr;
 
        nmp = NFSTONMP(np);
        struct timespec ts;
        struct sockaddr *saddr;
 
        nmp = NFSTONMP(np);

-       if (!nmp || !nmp->nm_saddr)
-               return (ENXIO);
+       if (!nmp || !nmp->nm_saddr) {
+               return ENXIO;
+       }

 
        lck_mtx_lock(&nmp->nm_lock);
        saddr = nmp->nm_saddr;
        bcopy(saddr, &msg->lm_addr, min(sizeof msg->lm_addr, saddr->sa_len));
 
        lck_mtx_lock(&nmp->nm_lock);
        saddr = nmp->nm_saddr;
        bcopy(saddr, &msg->lm_addr, min(sizeof msg->lm_addr, saddr->sa_len));

-       if (nmp->nm_vers == NFS_VER3)
+       if (nmp->nm_vers == NFS_VER3) {

                msg->lm_flags |= LOCKD_MSG_NFSV3;
                msg->lm_flags |= LOCKD_MSG_NFSV3;

-#if 0 /* not yet */
-       if (nmp->nm_sotype != SOCK_DGRAM)
+       }
+
+       if (nmp->nm_sotype != SOCK_DGRAM) {

                msg->lm_flags |= LOCKD_MSG_TCP;
                msg->lm_flags |= LOCKD_MSG_TCP;

-#endif
+       }

 
        microuptime(&now);
        starttime = now.tv_sec;
 
        microuptime(&now);
        starttime = now.tv_sec;


@@ -451,8 +478,9 @@ nfs3_lockd_request(
                lck_mtx_unlock(nfs_lock_mutex);
                error = nfs_lockd_send_request(msg, interruptable);
                lck_mtx_lock(nfs_lock_mutex);
                lck_mtx_unlock(nfs_lock_mutex);
                error = nfs_lockd_send_request(msg, interruptable);
                lck_mtx_lock(nfs_lock_mutex);

-               if (error && error != EAGAIN)
+               if (error && error != EAGAIN) {

                        break;
                        break;

+               }

 
                /*
                 * Always wait for an answer.  Not waiting for unlocks could
 
                /*
                 * Always wait for an answer.  Not waiting for unlocks could


@@ -508,16 +536,18 @@ wait_for_granted:
                                }
                                break;
                        }
                                }
                                break;
                        }

-                       if (error != EWOULDBLOCK)
+                       if (error != EWOULDBLOCK) {

                                break;
                                break;

+                       }

                        /* check that we still have our mount... */
                        /* ...and that we still support locks */
                        /* ...and that there isn't a recovery pending */
                        nmp = NFSTONMP(np);
                        if ((error2 = nfs_sigintr(nmp, NULL, NULL, 0))) {
                                error = error2;
                        /* check that we still have our mount... */
                        /* ...and that we still support locks */
                        /* ...and that there isn't a recovery pending */
                        nmp = NFSTONMP(np);
                        if ((error2 = nfs_sigintr(nmp, NULL, NULL, 0))) {
                                error = error2;

-                               if (type == F_UNLCK)
+                               if (type == F_UNLCK) {

                                        printf("nfs3_lockd_request: aborting unlock request, error %d\n", error);
                                        printf("nfs3_lockd_request: aborting unlock request, error %d\n", error);

+                               }

                                break;
                        }
                        lck_mtx_lock(&nmp->nm_lock);
                                break;
                        }
                        lck_mtx_lock(&nmp->nm_lock);


@@ -541,16 +571,18 @@ wait_for_granted:
                        if ((error2 = nfs_sigintr(nmp, NULL, NULL, 0))) {
                                error = error2;
                                if (error2 != EINTR) {
                        if ((error2 = nfs_sigintr(nmp, NULL, NULL, 0))) {
                                error = error2;
                                if (error2 != EINTR) {

-                                       if (type == F_UNLCK)
+                                       if (type == F_UNLCK) {

                                                printf("nfs3_lockd_request: aborting unlock request, error %d\n", error);
                                                printf("nfs3_lockd_request: aborting unlock request, error %d\n", error);

+                                       }

                                        break;
                                }
                        }
                        /* ...and that we still support locks */
                        lck_mtx_lock(&nmp->nm_lock);
                        if (nmp->nm_lockmode == NFS_LOCK_MODE_DISABLED) {
                                        break;
                                }
                        }
                        /* ...and that we still support locks */
                        lck_mtx_lock(&nmp->nm_lock);
                        if (nmp->nm_lockmode == NFS_LOCK_MODE_DISABLED) {

-                               if (error == EWOULDBLOCK)
+                               if (error == EWOULDBLOCK) {

                                        error = ENOTSUP;
                                        error = ENOTSUP;

+                               }

                                lck_mtx_unlock(&nmp->nm_lock);
                                break;
                        }
                                lck_mtx_unlock(&nmp->nm_lock);
                                break;
                        }


@@ -603,10 +635,11 @@ wait_for_granted:
                            ((lastmsg + nmp->nm_tprintf_delay) < now.tv_sec)) {
                                lck_mtx_unlock(&nmp->nm_lock);
                                lastmsg = now.tv_sec;
                            ((lastmsg + nmp->nm_tprintf_delay) < now.tv_sec)) {
                                lck_mtx_unlock(&nmp->nm_lock);
                                lastmsg = now.tv_sec;

-                               nfs_down(nmp, thd, 0, NFSSTA_LOCKTIMEO, "lockd not responding");
+                               nfs_down(nmp, thd, 0, NFSSTA_LOCKTIMEO, "lockd not responding", 1);

                                wentdown = 1;
                                wentdown = 1;

-                       } else
+                       } else {

                                lck_mtx_unlock(&nmp->nm_lock);
                                lck_mtx_unlock(&nmp->nm_lock);

+                       }

 
                        if (msgreq->lmr_errno == EINPROGRESS) {
                                /*
 
                        if (msgreq->lmr_errno == EINPROGRESS) {
                                /*


@@ -635,17 +668,19 @@ wait_for_granted:
                        /*
                         * We timed out, so we will resend the request.
                         */
                        /*
                         * We timed out, so we will resend the request.
                         */

-                       if (!(flags & R_RECOVER))
+                       if (!(flags & R_RECOVER)) {

                                timeo *= 2;
                                timeo *= 2;

-                       if (timeo > 30)
+                       }
+                       if (timeo > 30) {

                                timeo = 30;
                                timeo = 30;

+                       }

                        /* resend request */
                        continue;
                }
 
                /* we got a reponse, so the server's lockd is OK */
                nfs_up(NFSTONMP(np), thd, NFSSTA_LOCKTIMEO,
                        /* resend request */
                        continue;
                }
 
                /* we got a reponse, so the server's lockd is OK */
                nfs_up(NFSTONMP(np), thd, NFSSTA_LOCKTIMEO,

-                       wentdown ? "lockd alive again" : NULL);
+                   wentdown ? "lockd alive again" : NULL);

                wentdown = 0;
 
                if (msgreq->lmr_answered && (msg->lm_flags & LOCKD_MSG_DENIED_GRACE)) {
                wentdown = 0;
 
                if (msgreq->lmr_answered && (msg->lm_flags & LOCKD_MSG_DENIED_GRACE)) {


@@ -675,8 +710,8 @@ wait_for_granted:
                         * higher levels can resend the request.
                         */
                        msg->lm_flags &= ~LOCKD_MSG_CANCEL;
                         * higher levels can resend the request.
                         */
                        msg->lm_flags &= ~LOCKD_MSG_CANCEL;

-                       nfs_lockdmsg_dequeue(msgreq);

                        error = NFSERR_DENIED;
                        error = NFSERR_DENIED;

+                       /* Will dequeue msgreq after the following break at the end of this routine */

                        break;
                }
 
                        break;
                }
 


@@ -710,15 +745,16 @@ wait_for_granted:
                        nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
                        lck_mtx_unlock(&nmp->nm_lock);
                        printf("lockd returned ENOTSUP, disabling locks for nfs server: %s\n",
                        nmp->nm_state &= ~NFSSTA_LOCKTIMEO;
                        lck_mtx_unlock(&nmp->nm_lock);
                        printf("lockd returned ENOTSUP, disabling locks for nfs server: %s\n",

-                               vfs_statfs(nmp->nm_mountp)->f_mntfromname);
-                       return (error);
+                           vfs_statfs(nmp->nm_mountp)->f_mntfromname);
+                       return error;

                }
                if (!error) {
                        /* record that NFS file locking has worked on this mount */
                        if (nmp) {
                                lck_mtx_lock(&nmp->nm_lock);
                }
                if (!error) {
                        /* record that NFS file locking has worked on this mount */
                        if (nmp) {
                                lck_mtx_lock(&nmp->nm_lock);

-                               if (!(nmp->nm_state & NFSSTA_LOCKSWORK))
+                               if (!(nmp->nm_state & NFSSTA_LOCKSWORK)) {

                                        nmp->nm_state |= NFSSTA_LOCKSWORK;
                                        nmp->nm_state |= NFSSTA_LOCKSWORK;

+                               }

                                lck_mtx_unlock(&nmp->nm_lock);
                        }
                }
                                lck_mtx_unlock(&nmp->nm_lock);
                        }
                }


@@ -729,7 +765,7 @@ wait_for_granted:
 
        lck_mtx_unlock(nfs_lock_mutex);
 
 
        lck_mtx_unlock(nfs_lock_mutex);
 

-       return (error);
+       return error;

 }
 
 /*
 }
 
 /*


@@ -752,24 +788,28 @@ nfs3_setlock_rpc(
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);

-       if (!nmp)
-               return (ENXIO);
+       if (nfs_mount_gone(nmp)) {
+               return ENXIO;
+       }

 
        if (!nlop->nlo_open_owner) {
                nfs_open_owner_ref(nofp->nof_owner);
                nlop->nlo_open_owner = nofp->nof_owner;
        }
 
        if (!nlop->nlo_open_owner) {
                nfs_open_owner_ref(nofp->nof_owner);
                nlop->nlo_open_owner = nofp->nof_owner;
        }

-       if ((error = nfs_lock_owner_set_busy(nlop, thd)))
-               return (error);
+       if ((error = nfs_lock_owner_set_busy(nlop, thd))) {
+               return error;
+       }

 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));
        msg = &msgreq.lmr_msg;
        msg->lm_version = LOCKD_MSG_VERSION;
 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));
        msg = &msgreq.lmr_msg;
        msg->lm_version = LOCKD_MSG_VERSION;

-       if ((nflp->nfl_flags & NFS_FILE_LOCK_WAIT) && !reclaim)
+       if ((nflp->nfl_flags & NFS_FILE_LOCK_WAIT) && !reclaim) {

                msg->lm_flags |= LOCKD_MSG_BLOCK;
                msg->lm_flags |= LOCKD_MSG_BLOCK;

-       if (reclaim)
+       }
+       if (reclaim) {

                msg->lm_flags |= LOCKD_MSG_RECLAIM;
                msg->lm_flags |= LOCKD_MSG_RECLAIM;

+       }

        msg->lm_fh_len = (nmp->nm_vers == NFS_VER2) ? NFSX_V2FH : np->n_fhsize;
        bcopy(np->n_fhp, msg->lm_fh, msg->lm_fh_len);
        cru2x(cred, &msg->lm_cred);
        msg->lm_fh_len = (nmp->nm_vers == NFS_VER2) ? NFSX_V2FH : np->n_fhsize;
        bcopy(np->n_fhp, msg->lm_fh, msg->lm_fh_len);
        cru2x(cred, &msg->lm_cred);


@@ -783,7 +823,7 @@ nfs3_setlock_rpc(
        error = nfs3_lockd_request(np, 0, &msgreq, flags, thd);
 
        nfs_lock_owner_clear_busy(nlop);
        error = nfs3_lockd_request(np, 0, &msgreq, flags, thd);
 
        nfs_lock_owner_clear_busy(nlop);

-       return (error);
+       return error;

 }
 
 /*
 }
 
 /*


@@ -805,8 +845,9 @@ nfs3_unlock_rpc(
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);

-       if (!nmp)
-               return (ENXIO);
+       if (!nmp) {
+               return ENXIO;
+       }

 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));
 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));


@@ -822,7 +863,7 @@ nfs3_unlock_rpc(
        msg->lm_fl.l_type = F_UNLCK;
        msg->lm_fl.l_pid = nlop->nlo_pid;
 
        msg->lm_fl.l_type = F_UNLCK;
        msg->lm_fl.l_pid = nlop->nlo_pid;
 

-       return (nfs3_lockd_request(np, F_UNLCK, &msgreq, flags, thd));
+       return nfs3_lockd_request(np, F_UNLCK, &msgreq, flags, thd);

 }
 
 /*
 }
 
 /*


@@ -843,8 +884,9 @@ nfs3_getlock_rpc(
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);
        LOCKD_MSG *msg;
 
        nmp = NFSTONMP(np);

-       if (!nmp)
-               return (ENXIO);
+       if (nfs_mount_gone(nmp)) {
+               return ENXIO;
+       }

 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));
 
        /* set up lock message request structure */
        bzero(&msgreq, sizeof(msgreq));


@@ -870,11 +912,12 @@ nfs3_getlock_rpc(
                        fl->l_start = msg->lm_fl.l_start;
                        fl->l_len = msg->lm_fl.l_len;
                        fl->l_whence = SEEK_SET;
                        fl->l_start = msg->lm_fl.l_start;
                        fl->l_len = msg->lm_fl.l_len;
                        fl->l_whence = SEEK_SET;

-               } else
+               } else {

                        fl->l_type = F_UNLCK;
                        fl->l_type = F_UNLCK;

+               }

        }
 
        }
 

-       return (error);
+       return error;

 }
 
 /*
 }
 
 /*


@@ -889,12 +932,14 @@ nfslockdans(proc_t p, struct lockd_ans *ansp)
 
        /* Let root make this call. */
        error = proc_suser(p);
 
        /* Let root make this call. */
        error = proc_suser(p);

-       if (error)
-               return (error);
+       if (error) {
+               return error;
+       }

 
        /* the version should match, or we're out of sync */
 
        /* the version should match, or we're out of sync */

-       if (ansp->la_version != LOCKD_ANS_VERSION)
-               return (EINVAL);
+       if (ansp->la_version != LOCKD_ANS_VERSION) {
+               return EINVAL;
+       }

 
        lck_mtx_lock(nfs_lock_mutex);
 
 
        lck_mtx_lock(nfs_lock_mutex);
 


@@ -907,27 +952,30 @@ nfslockdans(proc_t p, struct lockd_ans *ansp)
                 * If no message was found or it doesn't match the answer,
                 * we look for the lockd message by the answer's lock info.
                 */
                 * If no message was found or it doesn't match the answer,
                 * we look for the lockd message by the answer's lock info.
                 */

-               if (!msgreq || nfs_lockdmsg_compare_to_answer(msgreq, ansp))
+               if (!msgreq || nfs_lockdmsg_compare_to_answer(msgreq, ansp)) {

                        msgreq = nfs_lockdmsg_find_by_answer(ansp);
                        msgreq = nfs_lockdmsg_find_by_answer(ansp);

+               }

                /*
                 * We need to make sure this request isn't being cancelled
                 * If it is, we don't want to accept the granted message.
                 */
                /*
                 * We need to make sure this request isn't being cancelled
                 * If it is, we don't want to accept the granted message.
                 */

-               if (msgreq && (msgreq->lmr_msg.lm_flags & LOCKD_MSG_CANCEL))
+               if (msgreq && (msgreq->lmr_msg.lm_flags & LOCKD_MSG_CANCEL)) {

                        msgreq = NULL;
                        msgreq = NULL;

+               }

        }
        if (!msgreq) {
                lck_mtx_unlock(nfs_lock_mutex);
        }
        if (!msgreq) {
                lck_mtx_unlock(nfs_lock_mutex);

-               return (EPIPE);
+               return EPIPE;

        }
 
        msgreq->lmr_errno = ansp->la_errno;
        if ((msgreq->lmr_msg.lm_flags & LOCKD_MSG_TEST) && msgreq->lmr_errno == 0) {
                if (ansp->la_flags & LOCKD_ANS_LOCK_INFO) {
        }
 
        msgreq->lmr_errno = ansp->la_errno;
        if ((msgreq->lmr_msg.lm_flags & LOCKD_MSG_TEST) && msgreq->lmr_errno == 0) {
                if (ansp->la_flags & LOCKD_ANS_LOCK_INFO) {

-                       if (ansp->la_flags & LOCKD_ANS_LOCK_EXCL)
+                       if (ansp->la_flags & LOCKD_ANS_LOCK_EXCL) {

                                msgreq->lmr_msg.lm_fl.l_type = F_WRLCK;
                                msgreq->lmr_msg.lm_fl.l_type = F_WRLCK;

-                       else
+                       } else {

                                msgreq->lmr_msg.lm_fl.l_type = F_RDLCK;
                                msgreq->lmr_msg.lm_fl.l_type = F_RDLCK;

+                       }

                        msgreq->lmr_msg.lm_fl.l_pid = ansp->la_pid;
                        msgreq->lmr_msg.lm_fl.l_start = ansp->la_start;
                        msgreq->lmr_msg.lm_fl.l_len = ansp->la_len;
                        msgreq->lmr_msg.lm_fl.l_pid = ansp->la_pid;
                        msgreq->lmr_msg.lm_fl.l_start = ansp->la_start;
                        msgreq->lmr_msg.lm_fl.l_len = ansp->la_len;


@@ -935,14 +983,15 @@ nfslockdans(proc_t p, struct lockd_ans *ansp)
                        msgreq->lmr_msg.lm_fl.l_type = F_UNLCK;
                }
        }
                        msgreq->lmr_msg.lm_fl.l_type = F_UNLCK;
                }
        }

-       if (ansp->la_flags & LOCKD_ANS_DENIED_GRACE)
+       if (ansp->la_flags & LOCKD_ANS_DENIED_GRACE) {

                msgreq->lmr_msg.lm_flags |= LOCKD_MSG_DENIED_GRACE;
                msgreq->lmr_msg.lm_flags |= LOCKD_MSG_DENIED_GRACE;

+       }

 
        msgreq->lmr_answered = 1;
        lck_mtx_unlock(nfs_lock_mutex);
        wakeup(msgreq);
 
 
        msgreq->lmr_answered = 1;
        lck_mtx_unlock(nfs_lock_mutex);
        wakeup(msgreq);
 

-       return (0);
+       return 0;

 }
 
 /*
 }
 
 /*


@@ -962,32 +1011,38 @@ nfslockdnotify(proc_t p, user_addr_t argp)
 
        /* Let root make this call. */
        error = proc_suser(p);
 
        /* Let root make this call. */
        error = proc_suser(p);

-       if (error)
-               return (error);
+       if (error) {
+               return error;
+       }

 
        headsize = (char*)&ln.ln_addr[0] - (char*)&ln.ln_version;
        error = copyin(argp, &ln, headsize);
 
        headsize = (char*)&ln.ln_addr[0] - (char*)&ln.ln_version;
        error = copyin(argp, &ln, headsize);

-       if (error)
-               return (error);
-       if (ln.ln_version != LOCKD_NOTIFY_VERSION)
-               return (EINVAL);
-       if ((ln.ln_addrcount < 1) || (ln.ln_addrcount > 128))
-               return (EINVAL);
+       if (error) {
+               return error;
+       }
+       if (ln.ln_version != LOCKD_NOTIFY_VERSION) {
+               return EINVAL;
+       }
+       if ((ln.ln_addrcount < 1) || (ln.ln_addrcount > 128)) {
+               return EINVAL;
+       }

        argp += headsize;
        saddr = (struct sockaddr *)&ln.ln_addr[0];
 
        lck_mtx_lock(nfs_lock_mutex);
 
        argp += headsize;
        saddr = (struct sockaddr *)&ln.ln_addr[0];
 
        lck_mtx_lock(nfs_lock_mutex);
 

-       for (i=0; i < ln.ln_addrcount; i++) {
+       for (i = 0; i < ln.ln_addrcount; i++) {

                error = copyin(argp, &ln.ln_addr[0], sizeof(ln.ln_addr[0]));
                error = copyin(argp, &ln.ln_addr[0], sizeof(ln.ln_addr[0]));

-               if (error)
+               if (error) {

                        break;
                        break;

+               }

                argp += sizeof(ln.ln_addr[0]);
                /* scan lockd mount list for match to this address */
                TAILQ_FOREACH(nmp, &nfs_lockd_mount_list, nm_ldlink) {
                        /* check if address matches this mount's server address */
                argp += sizeof(ln.ln_addr[0]);
                /* scan lockd mount list for match to this address */
                TAILQ_FOREACH(nmp, &nfs_lockd_mount_list, nm_ldlink) {
                        /* check if address matches this mount's server address */

-                       if (!nmp->nm_saddr || nfs_sockaddr_cmp(saddr, nmp->nm_saddr))
+                       if (!nmp->nm_saddr || nfs_sockaddr_cmp(saddr, nmp->nm_saddr)) {

                                continue;
                                continue;

+                       }

                        /* We have a match!  Mark it as needing recovery. */
                        lck_mtx_lock(&nmp->nm_lock);
                        nfs_need_recover(nmp, 0);
                        /* We have a match!  Mark it as needing recovery. */
                        lck_mtx_lock(&nmp->nm_lock);
                        nfs_need_recover(nmp, 0);


@@ -997,6 +1052,7 @@ nfslockdnotify(proc_t p, user_addr_t argp)
 
        lck_mtx_unlock(nfs_lock_mutex);
 
 
        lck_mtx_unlock(nfs_lock_mutex);
 

-       return (error);
+       return error;

 }
 
 }
 

+#endif /* CONFIG_NFS_CLIENT */