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| author | kib <kib@FreeBSD.org> | 2013-01-14 05:41:40 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2013-01-14 05:41:40 +0000 |
| commit | b3d1d61e31adccd26b4386c4cffed34b1f632d09 (patch) | |
| tree | 75a8ce6f566ad54b4e7ecbe4e098c6de9b9a63bf /sys/kern/vfs_hash.c | |
| parent | b11dfc2e2a448d92c8ab34d14d38bb059945ec07 (diff) | |
| download | FreeBSD-src-b3d1d61e31adccd26b4386c4cffed34b1f632d09.zip FreeBSD-src-b3d1d61e31adccd26b4386c4cffed34b1f632d09.tar.gz | |
Add exported vfs_hash_index() function, which calculates the canonical
pre-masked hash for the given vnode. The function assumes that
vp->v_hash is initialized by the filesystem vnode instantiation
function. At the moment, it is only done if filesystem uses
vfs_hash_insert().
Reviewed by: peter
Tested by: peter, pho (previous version)
Sponsored by: The FreeBSD Foundation
MFC after: 5 days
Diffstat (limited to 'sys/kern/vfs_hash.c')
| -rw-r--r-- | sys/kern/vfs_hash.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/kern/vfs_hash.c b/sys/kern/vfs_hash.c index f1d4a91..0271e49 100644 --- a/sys/kern/vfs_hash.c +++ b/sys/kern/vfs_hash.c @@ -54,6 +54,13 @@ vfs_hashinit(void *dummy __unused) /* Must be SI_ORDER_SECOND so desiredvnodes is available */ SYSINIT(vfs_hash, SI_SUB_VFS, SI_ORDER_SECOND, vfs_hashinit, NULL); +u_int +vfs_hash_index(struct vnode *vp) +{ + + return (vp->v_hash + vp->v_mount->mnt_hashseed); +} + static struct vfs_hash_head * vfs_hash_bucket(const struct mount *mp, u_int hash) { |
