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vfs_subr.c (92723) vfs_subr.c (92751)
1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
39 * $FreeBSD: head/sys/kern/vfs_subr.c 92723 2002-03-19 21:25:46Z alfred $
39 * $FreeBSD: head/sys/kern/vfs_subr.c 92751 2002-03-20 04:09:59Z jeff $
40 */
41
42/*
43 * External virtual filesystem routines
44 */
45#include "opt_ddb.h"
46#include "opt_ffs.h"
47

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64#include <sys/vnode.h>
65
66#include <vm/vm.h>
67#include <vm/vm_object.h>
68#include <vm/vm_extern.h>
69#include <vm/pmap.h>
70#include <vm/vm_map.h>
71#include <vm/vm_page.h>
40 */
41
42/*
43 * External virtual filesystem routines
44 */
45#include "opt_ddb.h"
46#include "opt_ffs.h"
47

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64#include <sys/vnode.h>
65
66#include <vm/vm.h>
67#include <vm/vm_object.h>
68#include <vm/vm_extern.h>
69#include <vm/pmap.h>
70#include <vm/vm_map.h>
71#include <vm/vm_page.h>
72#include <vm/vm_zone.h>
72#include <vm/uma.h>
73
74static MALLOC_DEFINE(M_NETADDR, "Export Host", "Export host address structure");
75
76static void addalias(struct vnode *vp, dev_t nvp_rdev);
77static void insmntque(struct vnode *vp, struct mount *mp);
78static void vclean(struct vnode *vp, int flags, struct thread *td);
79static void vlruvp(struct vnode *vp);
80

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183 * v_specnext)
184 */
185static struct mtx spechash_mtx;
186
187/* Publicly exported FS */
188struct nfs_public nfs_pub;
189
190/* Zone for allocation of new vnodes - used exclusively by getnewvnode() */
73
74static MALLOC_DEFINE(M_NETADDR, "Export Host", "Export host address structure");
75
76static void addalias(struct vnode *vp, dev_t nvp_rdev);
77static void insmntque(struct vnode *vp, struct mount *mp);
78static void vclean(struct vnode *vp, int flags, struct thread *td);
79static void vlruvp(struct vnode *vp);
80

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183 * v_specnext)
184 */
185static struct mtx spechash_mtx;
186
187/* Publicly exported FS */
188struct nfs_public nfs_pub;
189
190/* Zone for allocation of new vnodes - used exclusively by getnewvnode() */
191static vm_zone_t vnode_zone;
192static vm_zone_t vnodepoll_zone;
191static uma_zone_t vnode_zone;
192static uma_zone_t vnodepoll_zone;
193
194/* Set to 1 to print out reclaim of active vnodes */
195int prtactive;
196
197/*
198 * The workitem queue.
199 *
200 * It is useful to delay writes of file data and filesystem metadata

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252 &minvnodes, 0, "Minimum number of vnodes");
253static int vnlru_nowhere;
254SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW, &vnlru_nowhere, 0,
255 "Number of times the vnlru process ran without success");
256
257void
258v_addpollinfo(struct vnode *vp)
259{
193
194/* Set to 1 to print out reclaim of active vnodes */
195int prtactive;
196
197/*
198 * The workitem queue.
199 *
200 * It is useful to delay writes of file data and filesystem metadata

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252 &minvnodes, 0, "Minimum number of vnodes");
253static int vnlru_nowhere;
254SYSCTL_INT(_debug, OID_AUTO, vnlru_nowhere, CTLFLAG_RW, &vnlru_nowhere, 0,
255 "Number of times the vnlru process ran without success");
256
257void
258v_addpollinfo(struct vnode *vp)
259{
260 vp->v_pollinfo = zalloc(vnodepoll_zone);
260 vp->v_pollinfo = uma_zalloc(vnodepoll_zone, M_WAITOK);
261 mtx_init(&vp->v_pollinfo->vpi_lock, "vnode pollinfo", MTX_DEF);
262}
263
264/*
265 * Initialize the vnode management data structures.
266 */
267static void
268vntblinit(void *dummy __unused)
269{
270
271 desiredvnodes = maxproc + cnt.v_page_count / 4;
272 minvnodes = desiredvnodes / 4;
273 mtx_init(&mountlist_mtx, "mountlist", MTX_DEF);
274 mtx_init(&mntvnode_mtx, "mntvnode", MTX_DEF);
275 mtx_init(&mntid_mtx, "mntid", MTX_DEF);
276 mtx_init(&spechash_mtx, "spechash", MTX_DEF);
277 TAILQ_INIT(&vnode_free_list);
278 mtx_init(&vnode_free_list_mtx, "vnode_free_list", MTX_DEF);
261 mtx_init(&vp->v_pollinfo->vpi_lock, "vnode pollinfo", MTX_DEF);
262}
263
264/*
265 * Initialize the vnode management data structures.
266 */
267static void
268vntblinit(void *dummy __unused)
269{
270
271 desiredvnodes = maxproc + cnt.v_page_count / 4;
272 minvnodes = desiredvnodes / 4;
273 mtx_init(&mountlist_mtx, "mountlist", MTX_DEF);
274 mtx_init(&mntvnode_mtx, "mntvnode", MTX_DEF);
275 mtx_init(&mntid_mtx, "mntid", MTX_DEF);
276 mtx_init(&spechash_mtx, "spechash", MTX_DEF);
277 TAILQ_INIT(&vnode_free_list);
278 mtx_init(&vnode_free_list_mtx, "vnode_free_list", MTX_DEF);
279 vnode_zone = zinit("VNODE", sizeof (struct vnode), 0, 0, 5);
280 vnodepoll_zone = zinit("VNODEPOLL", sizeof (struct vpollinfo), 0, 0, 5);
279 vnode_zone = uma_zcreate("VNODE", sizeof (struct vnode), NULL, NULL,
280 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
281 vnodepoll_zone = uma_zcreate("VNODEPOLL", sizeof (struct vpollinfo),
282 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
281 /*
282 * Initialize the filesystem syncer.
283 */
284 syncer_workitem_pending = hashinit(syncer_maxdelay, M_VNODE,
285 &syncer_mask);
286 syncer_maxdelay = syncer_mask + 1;
287}
288SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_FIRST, vntblinit, NULL)

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791 panic("Clean vnode has pending I/O's");
792 splx(s);
793 if (vp->v_writecount != 0)
794 panic("Non-zero write count");
795 }
796#endif
797 if (vp->v_pollinfo) {
798 mtx_destroy(&vp->v_pollinfo->vpi_lock);
283 /*
284 * Initialize the filesystem syncer.
285 */
286 syncer_workitem_pending = hashinit(syncer_maxdelay, M_VNODE,
287 &syncer_mask);
288 syncer_maxdelay = syncer_mask + 1;
289}
290SYSINIT(vfs, SI_SUB_VFS, SI_ORDER_FIRST, vntblinit, NULL)

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793 panic("Clean vnode has pending I/O's");
794 splx(s);
795 if (vp->v_writecount != 0)
796 panic("Non-zero write count");
797 }
798#endif
799 if (vp->v_pollinfo) {
800 mtx_destroy(&vp->v_pollinfo->vpi_lock);
799 zfree(vnodepoll_zone, vp->v_pollinfo);
801 uma_zfree(vnodepoll_zone, vp->v_pollinfo);
800 }
801 vp->v_pollinfo = NULL;
802 vp->v_flag = 0;
803 vp->v_lastw = 0;
804 vp->v_lasta = 0;
805 vp->v_cstart = 0;
806 vp->v_clen = 0;
807 vp->v_socket = 0;
808 } else {
809 mtx_unlock(&vnode_free_list_mtx);
802 }
803 vp->v_pollinfo = NULL;
804 vp->v_flag = 0;
805 vp->v_lastw = 0;
806 vp->v_lasta = 0;
807 vp->v_cstart = 0;
808 vp->v_clen = 0;
809 vp->v_socket = 0;
810 } else {
811 mtx_unlock(&vnode_free_list_mtx);
810 vp = (struct vnode *) zalloc(vnode_zone);
812 vp = (struct vnode *) uma_zalloc(vnode_zone, M_WAITOK);
811 bzero((char *) vp, sizeof *vp);
812 mtx_init(&vp->v_interlock, "vnode interlock", MTX_DEF);
813 vp->v_dd = vp;
814 cache_purge(vp);
815 LIST_INIT(&vp->v_cache_src);
816 TAILQ_INIT(&vp->v_cache_dst);
817 numvnodes++;
818 }

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3032 */
3033void
3034NDFREE(ndp, flags)
3035 struct nameidata *ndp;
3036 const uint flags;
3037{
3038 if (!(flags & NDF_NO_FREE_PNBUF) &&
3039 (ndp->ni_cnd.cn_flags & HASBUF)) {
813 bzero((char *) vp, sizeof *vp);
814 mtx_init(&vp->v_interlock, "vnode interlock", MTX_DEF);
815 vp->v_dd = vp;
816 cache_purge(vp);
817 LIST_INIT(&vp->v_cache_src);
818 TAILQ_INIT(&vp->v_cache_dst);
819 numvnodes++;
820 }

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3034 */
3035void
3036NDFREE(ndp, flags)
3037 struct nameidata *ndp;
3038 const uint flags;
3039{
3040 if (!(flags & NDF_NO_FREE_PNBUF) &&
3041 (ndp->ni_cnd.cn_flags & HASBUF)) {
3040 zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
3042 uma_zfree(namei_zone, ndp->ni_cnd.cn_pnbuf);
3041 ndp->ni_cnd.cn_flags &= ~HASBUF;
3042 }
3043 if (!(flags & NDF_NO_DVP_UNLOCK) &&
3044 (ndp->ni_cnd.cn_flags & LOCKPARENT) &&
3045 ndp->ni_dvp != ndp->ni_vp)
3046 VOP_UNLOCK(ndp->ni_dvp, 0, ndp->ni_cnd.cn_thread);
3047 if (!(flags & NDF_NO_DVP_RELE) &&
3048 (ndp->ni_cnd.cn_flags & (LOCKPARENT|WANTPARENT))) {

--- 146 unchanged lines hidden --- 		3043 ndp->ni_cnd.cn_flags &= ~HASBUF;
3044 }
3045 if (!(flags & NDF_NO_DVP_UNLOCK) &&
3046 (ndp->ni_cnd.cn_flags & LOCKPARENT) &&
3047 ndp->ni_dvp != ndp->ni_vp)
3048 VOP_UNLOCK(ndp->ni_dvp, 0, ndp->ni_cnd.cn_thread);
3049 if (!(flags & NDF_NO_DVP_RELE) &&
3050 (ndp->ni_cnd.cn_flags & (LOCKPARENT|WANTPARENT))) {

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