diff options
Diffstat (limited to 'sys/fs/nfs/nfs_commonsubs.c')
| -rw-r--r-- | sys/fs/nfs/nfs_commonsubs.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/sys/fs/nfs/nfs_commonsubs.c b/sys/fs/nfs/nfs_commonsubs.c index e725889..03b5786 100644 --- a/sys/fs/nfs/nfs_commonsubs.c +++ b/sys/fs/nfs/nfs_commonsubs.c @@ -1726,11 +1726,13 @@ nfsmout: * Any usecnt must be decremented by calling nfsv4_relref() before * calling nfsv4_lock(). It was done this way, so nfsv4_lock() could * be called in a loop. - * The last argument is set to indicate if the call slept, iff not NULL. + * The isleptp argument is set to indicate if the call slept, iff not NULL + * and the mp argument indicates to check for a forced dismount, iff not + * NULL. */ APPLESTATIC int nfsv4_lock(struct nfsv4lock *lp, int iwantlock, int *isleptp, - void *mutex) + void *mutex, struct mount *mp) { if (isleptp) @@ -1751,6 +1753,10 @@ nfsv4_lock(struct nfsv4lock *lp, int iwantlock, int *isleptp, lp->nfslock_lock |= NFSV4LOCK_LOCKWANTED; } while (lp->nfslock_lock & (NFSV4LOCK_LOCK | NFSV4LOCK_LOCKWANTED)) { + if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) { + lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED; + return (0); + } lp->nfslock_lock |= NFSV4LOCK_WANTED; if (isleptp) *isleptp = 1; @@ -1801,9 +1807,12 @@ nfsv4_relref(struct nfsv4lock *lp) * not wait for threads that want the exclusive lock. If priority needs * to be given to threads that need the exclusive lock, a call to nfsv4_lock() * with the 2nd argument == 0 should be done before calling nfsv4_getref(). + * If the mp argument is not NULL, check for MNTK_UNMOUNTF being set and + * return without getting a refcnt for that case. */ APPLESTATIC void -nfsv4_getref(struct nfsv4lock *lp, int *isleptp, void *mutex) +nfsv4_getref(struct nfsv4lock *lp, int *isleptp, void *mutex, + struct mount *mp) { if (isleptp) @@ -1813,12 +1822,16 @@ nfsv4_getref(struct nfsv4lock *lp, int *isleptp, void *mutex) * Wait for a lock held. */ while (lp->nfslock_lock & NFSV4LOCK_LOCK) { + if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) + return; lp->nfslock_lock |= NFSV4LOCK_WANTED; if (isleptp) *isleptp = 1; (void) nfsmsleep(&lp->nfslock_lock, mutex, PZERO - 1, "nfsv4lck", NULL); } + if (mp != NULL && (mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) + return; lp->nfslock_usecnt++; } |
