Date: Wed, 18 May 2016 11:58:17 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r300140 - in stable/10/sys: kern sys Message-ID: <201605181158.u4IBwH3R058914@repo.freebsd.org>
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Author: kib Date: Wed May 18 11:58:16 2016 New Revision: 300140 URL: https://svnweb.freebsd.org/changeset/base/300140 Log: MFC r299412: Add vfs_hash_ref(9) function, which finds a vnode by the hash value and returns it referenced. Modified: stable/10/sys/kern/vfs_hash.c stable/10/sys/sys/vnode.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/kern/vfs_hash.c ============================================================================== --- stable/10/sys/kern/vfs_hash.c Wed May 18 11:51:17 2016 (r300139) +++ stable/10/sys/kern/vfs_hash.c Wed May 18 11:58:16 2016 (r300140) @@ -103,6 +103,36 @@ vfs_hash_get(const struct mount *mp, u_i } void +vfs_hash_ref(const struct mount *mp, u_int hash, struct thread *td, + struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg) +{ + struct vnode *vp; + + while (1) { + mtx_lock(&vfs_hash_mtx); + LIST_FOREACH(vp, vfs_hash_bucket(mp, hash), v_hashlist) { + if (vp->v_hash != hash) + continue; + if (vp->v_mount != mp) + continue; + if (fn != NULL && fn(vp, arg)) + continue; + vhold(vp); + mtx_unlock(&vfs_hash_mtx); + vref(vp); + vdrop(vp); + *vpp = vp; + return; + } + if (vp == NULL) { + mtx_unlock(&vfs_hash_mtx); + *vpp = NULL; + return; + } + } +} + +void vfs_hash_remove(struct vnode *vp) { Modified: stable/10/sys/sys/vnode.h ============================================================================== --- stable/10/sys/sys/vnode.h Wed May 18 11:51:17 2016 (r300139) +++ stable/10/sys/sys/vnode.h Wed May 18 11:58:16 2016 (r300140) @@ -849,6 +849,8 @@ int vfs_hash_get(const struct mount *mp, u_int vfs_hash_index(struct vnode *vp); int vfs_hash_insert(struct vnode *vp, u_int hash, int flags, struct thread *td, struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); +void vfs_hash_ref(const struct mount *mp, u_int hash, struct thread *td, + struct vnode **vpp, vfs_hash_cmp_t *fn, void *arg); void vfs_hash_rehash(struct vnode *vp, u_int hash); void vfs_hash_remove(struct vnode *vp);
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