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| author | kib <kib@FreeBSD.org> | 2008-06-09 10:31:38 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2008-06-09 10:31:38 +0000 |
| commit | 926d12d0ea65c1b10638efb17de093ecc2fe4063 (patch) | |
| tree | ab9745925fe55b9a4f33ea4af659d8d13f96cc4f /sys/kern/vfs_mount.c | |
| parent | 98ec5e76a88638596bb55271c5e91a26f266703d (diff) | |
| download | FreeBSD-src-926d12d0ea65c1b10638efb17de093ecc2fe4063.zip FreeBSD-src-926d12d0ea65c1b10638efb17de093ecc2fe4063.tar.gz | |
Provide the mutual exclusion between the nfs export list modifications
and nfs requests processing. Lockmgr lock provides the shared locking for
nfs requests, while exclusive mode is used for modifications. The writer
starvation is handled by lockmgr too.
Reported by: kris, pho, many
Based on the submission by: mohan
Tested by: pho
MFC after: 2 weeks
Diffstat (limited to 'sys/kern/vfs_mount.c')
| -rw-r--r-- | sys/kern/vfs_mount.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/vfs_mount.c b/sys/kern/vfs_mount.c index 0b2bee6..ade918a 100644 --- a/sys/kern/vfs_mount.c +++ b/sys/kern/vfs_mount.c @@ -452,6 +452,7 @@ mount_init(void *mem, int size, int flags) mp = (struct mount *)mem; mtx_init(&mp->mnt_mtx, "struct mount mtx", NULL, MTX_DEF); lockinit(&mp->mnt_lock, PVFS, "vfslock", 0, 0); + lockinit(&mp->mnt_explock, PVFS, "explock", 0, 0); return (0); } @@ -461,6 +462,7 @@ mount_fini(void *mem, int size) struct mount *mp; mp = (struct mount *)mem; + lockdestroy(&mp->mnt_explock); lockdestroy(&mp->mnt_lock); mtx_destroy(&mp->mnt_mtx); } |
