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| author | rmacklem <rmacklem@FreeBSD.org> | 2015-04-30 12:39:24 +0000 |
|---|---|---|
| committer | rmacklem <rmacklem@FreeBSD.org> | 2015-04-30 12:39:24 +0000 |
| commit | fba63dddeb47d7daf52036b191fc27d0b34cb02b (patch) | |
| tree | 2eddb41071be4a6cf55f2041a43ee90ffc63440a /sys/fs/nullfs | |
| parent | 64b7754f6bf764fc7c4f921916e19418075e80e9 (diff) | |
| download | FreeBSD-src-fba63dddeb47d7daf52036b191fc27d0b34cb02b.zip FreeBSD-src-fba63dddeb47d7daf52036b191fc27d0b34cb02b.tar.gz | |
MFC: r281562
File systems that do not use the buffer cache (such as ZFS) must
use VOP_FSYNC() to perform the NFS server's Commit operation.
This patch adds a mnt_kern_flag called MNTK_USES_BCACHE which
is set by file systems that use the buffer cache. If this flag
is not set, the NFS server always does a VOP_FSYNC().
This should be ok for old file system modules that do not set
MNTK_USES_BCACHE, since calling VOP_FSYNC() is correct, although
it might not be optimal for file systems that use the buffer cache.
Diffstat (limited to 'sys/fs/nullfs')
| -rw-r--r-- | sys/fs/nullfs/null_vfsops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/fs/nullfs/null_vfsops.c b/sys/fs/nullfs/null_vfsops.c index 80824a5..64e1e29 100644 --- a/sys/fs/nullfs/null_vfsops.c +++ b/sys/fs/nullfs/null_vfsops.c @@ -198,6 +198,8 @@ nullfs_mount(struct mount *mp) MNTK_EXTENDED_SHARED); } mp->mnt_kern_flag |= MNTK_LOOKUP_EXCL_DOTDOT; + mp->mnt_kern_flag |= lowerrootvp->v_mount->mnt_kern_flag & + MNTK_USES_BCACHE; MNT_IUNLOCK(mp); mp->mnt_data = xmp; vfs_getnewfsid(mp); |
