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vfs_cache.c (85287) vfs_cache.c (89306)
1/*
2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Poul-Henning Kamp of the FreeBSD Project.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 20 unchanged lines hidden (view full) ---

29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)vfs_cache.c 8.5 (Berkeley) 3/22/95
1/*
2 * Copyright (c) 1989, 1993, 1995
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Poul-Henning Kamp of the FreeBSD Project.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 20 unchanged lines hidden (view full) ---

29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)vfs_cache.c 8.5 (Berkeley) 3/22/95
37 * $FreeBSD: head/sys/kern/vfs_cache.c 85287 2001-10-21 15:52:51Z des $
37 * $FreeBSD: head/sys/kern/vfs_cache.c 89306 2002-01-13 11:58:06Z alfred $
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/lock.h>
44#include <sys/sysctl.h>
45#include <sys/mount.h>

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711 return (EINVAL);
712 if (uap->buflen > MAXPATHLEN)
713 uap->buflen = MAXPATHLEN;
714 buf = bp = malloc(uap->buflen, M_TEMP, M_WAITOK);
715 bp += uap->buflen - 1;
716 *bp = '\0';
717 fdp = td->td_proc->p_fd;
718 slash_prefixed = 0;
38 */
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/lock.h>
44#include <sys/sysctl.h>
45#include <sys/mount.h>

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711 return (EINVAL);
712 if (uap->buflen > MAXPATHLEN)
713 uap->buflen = MAXPATHLEN;
714 buf = bp = malloc(uap->buflen, M_TEMP, M_WAITOK);
715 bp += uap->buflen - 1;
716 *bp = '\0';
717 fdp = td->td_proc->p_fd;
718 slash_prefixed = 0;
719 FILEDESC_LOCK(fdp);
719 for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
720 if (vp->v_flag & VROOT) {
721 if (vp->v_mount == NULL) { /* forced unmount */
720 for (vp = fdp->fd_cdir; vp != fdp->fd_rdir && vp != rootvnode;) {
721 if (vp->v_flag & VROOT) {
722 if (vp->v_mount == NULL) { /* forced unmount */
723 FILEDESC_UNLOCK(fdp);
722 free(buf, M_TEMP);
723 return (EBADF);
724 }
725 vp = vp->v_mount->mnt_vnodecovered;
726 continue;
727 }
728 if (vp->v_dd->v_id != vp->v_ddid) {
724 free(buf, M_TEMP);
725 return (EBADF);
726 }
727 vp = vp->v_mount->mnt_vnodecovered;
728 continue;
729 }
730 if (vp->v_dd->v_id != vp->v_ddid) {
731 FILEDESC_UNLOCK(fdp);
729 numcwdfail1++;
730 free(buf, M_TEMP);
731 return (ENOTDIR);
732 }
733 ncp = TAILQ_FIRST(&vp->v_cache_dst);
734 if (!ncp) {
732 numcwdfail1++;
733 free(buf, M_TEMP);
734 return (ENOTDIR);
735 }
736 ncp = TAILQ_FIRST(&vp->v_cache_dst);
737 if (!ncp) {
738 FILEDESC_UNLOCK(fdp);
735 numcwdfail2++;
736 free(buf, M_TEMP);
737 return (ENOENT);
738 }
739 if (ncp->nc_dvp != vp->v_dd) {
739 numcwdfail2++;
740 free(buf, M_TEMP);
741 return (ENOENT);
742 }
743 if (ncp->nc_dvp != vp->v_dd) {
744 FILEDESC_UNLOCK(fdp);
740 numcwdfail3++;
741 free(buf, M_TEMP);
742 return (EBADF);
743 }
744 for (i = ncp->nc_nlen - 1; i >= 0; i--) {
745 if (bp == buf) {
745 numcwdfail3++;
746 free(buf, M_TEMP);
747 return (EBADF);
748 }
749 for (i = ncp->nc_nlen - 1; i >= 0; i--) {
750 if (bp == buf) {
751 FILEDESC_UNLOCK(fdp);
746 numcwdfail4++;
747 free(buf, M_TEMP);
748 return (ENOMEM);
749 }
750 *--bp = ncp->nc_name[i];
751 }
752 if (bp == buf) {
752 numcwdfail4++;
753 free(buf, M_TEMP);
754 return (ENOMEM);
755 }
756 *--bp = ncp->nc_name[i];
757 }
758 if (bp == buf) {
759 FILEDESC_UNLOCK(fdp);
753 numcwdfail4++;
754 free(buf, M_TEMP);
755 return (ENOMEM);
756 }
757 *--bp = '/';
758 slash_prefixed = 1;
759 vp = vp->v_dd;
760 }
760 numcwdfail4++;
761 free(buf, M_TEMP);
762 return (ENOMEM);
763 }
764 *--bp = '/';
765 slash_prefixed = 1;
766 vp = vp->v_dd;
767 }
768 FILEDESC_UNLOCK(fdp);
761 if (!slash_prefixed) {
762 if (bp == buf) {
763 numcwdfail4++;
764 free(buf, M_TEMP);
765 return (ENOMEM);
766 }
767 *--bp = '/';
768 }

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806 return (ENODEV);
807 if (vn == NULL)
808 return (EINVAL);
809 buf = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
810 bp = buf + MAXPATHLEN - 1;
811 *bp = '\0';
812 fdp = td->td_proc->p_fd;
813 slash_prefixed = 0;
769 if (!slash_prefixed) {
770 if (bp == buf) {
771 numcwdfail4++;
772 free(buf, M_TEMP);
773 return (ENOMEM);
774 }
775 *--bp = '/';
776 }

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814 return (ENODEV);
815 if (vn == NULL)
816 return (EINVAL);
817 buf = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
818 bp = buf + MAXPATHLEN - 1;
819 *bp = '\0';
820 fdp = td->td_proc->p_fd;
821 slash_prefixed = 0;
822 FILEDESC_LOCK(fdp);
814 for (vp = vn; vp != fdp->fd_rdir && vp != rootvnode;) {
815 if (vp->v_flag & VROOT) {
816 if (vp->v_mount == NULL) { /* forced unmount */
823 for (vp = vn; vp != fdp->fd_rdir && vp != rootvnode;) {
824 if (vp->v_flag & VROOT) {
825 if (vp->v_mount == NULL) { /* forced unmount */
826 FILEDESC_UNLOCK(fdp);
817 free(buf, M_TEMP);
818 return (EBADF);
819 }
820 vp = vp->v_mount->mnt_vnodecovered;
821 continue;
822 }
823 if (vp != vn && vp->v_dd->v_id != vp->v_ddid) {
827 free(buf, M_TEMP);
828 return (EBADF);
829 }
830 vp = vp->v_mount->mnt_vnodecovered;
831 continue;
832 }
833 if (vp != vn && vp->v_dd->v_id != vp->v_ddid) {
834 FILEDESC_UNLOCK(fdp);
824 numfullpathfail1++;
825 free(buf, M_TEMP);
826 return (ENOTDIR);
827 }
828 ncp = TAILQ_FIRST(&vp->v_cache_dst);
829 if (!ncp) {
835 numfullpathfail1++;
836 free(buf, M_TEMP);
837 return (ENOTDIR);
838 }
839 ncp = TAILQ_FIRST(&vp->v_cache_dst);
840 if (!ncp) {
841 FILEDESC_UNLOCK(fdp);
830 numfullpathfail2++;
831 free(buf, M_TEMP);
832 return (ENOENT);
833 }
834 if (vp != vn && ncp->nc_dvp != vp->v_dd) {
842 numfullpathfail2++;
843 free(buf, M_TEMP);
844 return (ENOENT);
845 }
846 if (vp != vn && ncp->nc_dvp != vp->v_dd) {
847 FILEDESC_UNLOCK(fdp);
835 numfullpathfail3++;
836 free(buf, M_TEMP);
837 return (EBADF);
838 }
839 for (i = ncp->nc_nlen - 1; i >= 0; i--) {
840 if (bp == buf) {
848 numfullpathfail3++;
849 free(buf, M_TEMP);
850 return (EBADF);
851 }
852 for (i = ncp->nc_nlen - 1; i >= 0; i--) {
853 if (bp == buf) {
854 FILEDESC_UNLOCK(fdp);
841 numfullpathfail4++;
842 free(buf, M_TEMP);
843 return (ENOMEM);
844 }
845 *--bp = ncp->nc_name[i];
846 }
847 if (bp == buf) {
855 numfullpathfail4++;
856 free(buf, M_TEMP);
857 return (ENOMEM);
858 }
859 *--bp = ncp->nc_name[i];
860 }
861 if (bp == buf) {
862 FILEDESC_UNLOCK(fdp);
848 numfullpathfail4++;
849 free(buf, M_TEMP);
850 return (ENOMEM);
851 }
852 *--bp = '/';
853 slash_prefixed = 1;
854 vp = ncp->nc_dvp;
855 }
856 if (!slash_prefixed) {
857 if (bp == buf) {
863 numfullpathfail4++;
864 free(buf, M_TEMP);
865 return (ENOMEM);
866 }
867 *--bp = '/';
868 slash_prefixed = 1;
869 vp = ncp->nc_dvp;
870 }
871 if (!slash_prefixed) {
872 if (bp == buf) {
873 FILEDESC_UNLOCK(fdp);
858 numfullpathfail4++;
859 free(buf, M_TEMP);
860 return (ENOMEM);
861 }
862 *--bp = '/';
863 }
874 numfullpathfail4++;
875 free(buf, M_TEMP);
876 return (ENOMEM);
877 }
878 *--bp = '/';
879 }
880 FILEDESC_UNLOCK(fdp);
864 numfullpathfound++;
865 *retbuf = bp;
866 *freebuf = buf;
867 return (0);
868}
881 numfullpathfound++;
882 *retbuf = bp;
883 *freebuf = buf;
884 return (0);
885}