1b21636022
VOP_RECLAIM().
1232 lines
28 KiB
C
1232 lines
28 KiB
C
/*-
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* Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/* udf_vnops.c */
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/* Take care of the vnode side of things */
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/stat.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/iconv.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/dirent.h>
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#include <sys/queue.h>
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#include <sys/unistd.h>
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#include <sys/endian.h>
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#include <vm/uma.h>
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#include <fs/udf/ecma167-udf.h>
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#include <fs/udf/osta.h>
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#include <fs/udf/udf.h>
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#include <fs/udf/udf_mount.h>
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extern struct iconv_functions *udf_iconv;
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static vop_access_t udf_access;
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static vop_getattr_t udf_getattr;
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static vop_ioctl_t udf_ioctl;
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static vop_pathconf_t udf_pathconf;
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static vop_read_t udf_read;
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static vop_readdir_t udf_readdir;
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static vop_readlink_t udf_readlink;
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static vop_strategy_t udf_strategy;
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static vop_bmap_t udf_bmap;
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static vop_cachedlookup_t udf_lookup;
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static vop_reclaim_t udf_reclaim;
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static int udf_readatoffset(struct udf_node *node, int *size, off_t offset,
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struct buf **bp, uint8_t **data);
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static int udf_bmap_internal(struct udf_node *node, off_t offset,
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daddr_t *sector, uint32_t *max_size);
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static struct vop_vector udf_vnodeops = {
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.vop_default = &default_vnodeops,
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.vop_access = udf_access,
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.vop_bmap = udf_bmap,
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.vop_cachedlookup = udf_lookup,
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.vop_getattr = udf_getattr,
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.vop_ioctl = udf_ioctl,
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.vop_lookup = vfs_cache_lookup,
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.vop_pathconf = udf_pathconf,
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.vop_read = udf_read,
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.vop_readdir = udf_readdir,
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.vop_readlink = udf_readlink,
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.vop_reclaim = udf_reclaim,
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.vop_strategy = udf_strategy,
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};
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MALLOC_DEFINE(M_UDFFID, "UDF FID", "UDF FileId structure");
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MALLOC_DEFINE(M_UDFDS, "UDF DS", "UDF Dirstream structure");
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#define UDF_INVALID_BMAP -1
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/* Look up a udf_node based on the ino_t passed in and return it's vnode */
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int
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udf_hashlookup(struct udf_mnt *udfmp, ino_t id, int flags, struct vnode **vpp)
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{
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struct udf_node *node;
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struct udf_hash_lh *lh;
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int error;
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*vpp = NULL;
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loop:
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mtx_lock(&udfmp->hash_mtx);
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lh = &udfmp->hashtbl[id % udfmp->hashsz];
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if (lh == NULL)
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return (ENOENT);
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LIST_FOREACH(node, lh, le) {
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if (node->hash_id == id) {
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VI_LOCK(node->i_vnode);
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mtx_unlock(&udfmp->hash_mtx);
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error = vget(node->i_vnode, flags | LK_INTERLOCK,
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curthread);
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if (error == ENOENT)
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goto loop;
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if (error)
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return (error);
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*vpp = node->i_vnode;
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return (0);
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}
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}
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mtx_unlock(&udfmp->hash_mtx);
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return (0);
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}
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int
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udf_hashins(struct udf_node *node)
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{
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struct udf_mnt *udfmp;
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struct udf_hash_lh *lh;
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udfmp = node->udfmp;
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vn_lock(node->i_vnode, LK_EXCLUSIVE | LK_RETRY, curthread);
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mtx_lock(&udfmp->hash_mtx);
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lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz];
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if (lh == NULL)
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LIST_INIT(lh);
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LIST_INSERT_HEAD(lh, node, le);
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mtx_unlock(&udfmp->hash_mtx);
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return (0);
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}
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int
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udf_hashrem(struct udf_node *node)
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{
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struct udf_mnt *udfmp;
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struct udf_hash_lh *lh;
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udfmp = node->udfmp;
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mtx_lock(&udfmp->hash_mtx);
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lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz];
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if (lh == NULL)
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panic("hash entry is NULL, node->hash_id= %d\n", node->hash_id);
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LIST_REMOVE(node, le);
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mtx_unlock(&udfmp->hash_mtx);
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return (0);
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}
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int
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udf_allocv(struct mount *mp, struct vnode **vpp, struct thread *td)
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{
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int error;
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struct vnode *vp;
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error = getnewvnode("udf", mp, &udf_vnodeops, &vp);
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if (error) {
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printf("udf_allocv: failed to allocate new vnode\n");
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return (error);
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}
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*vpp = vp;
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return (0);
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}
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/* Convert file entry permission (5 bits per owner/group/user) to a mode_t */
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static mode_t
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udf_permtomode(struct udf_node *node)
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{
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uint32_t perm;
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uint16_t flags;
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mode_t mode;
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perm = le32toh(node->fentry->perm);
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flags = le16toh(node->fentry->icbtag.flags);
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mode = perm & UDF_FENTRY_PERM_USER_MASK;
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mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2);
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mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6);
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mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8);
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return (mode);
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}
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static int
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udf_access(struct vop_access_args *a)
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{
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struct vnode *vp;
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struct udf_node *node;
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mode_t a_mode, mode;
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vp = a->a_vp;
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node = VTON(vp);
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a_mode = a->a_mode;
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if (a_mode & VWRITE) {
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switch (vp->v_type) {
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case VDIR:
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case VLNK:
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case VREG:
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return (EROFS);
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/* NOT REACHED */
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default:
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break;
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}
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}
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mode = udf_permtomode(node);
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return (vaccess(vp->v_type, mode, node->fentry->uid, node->fentry->gid,
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a_mode, a->a_cred, NULL));
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}
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static int mon_lens[2][12] = {
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{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
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{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
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};
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static int
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udf_isaleapyear(int year)
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{
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int i;
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i = (year % 4) ? 0 : 1;
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i &= (year % 100) ? 1 : 0;
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i |= (year % 400) ? 0 : 1;
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return i;
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}
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/*
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* XXX This is just a rough hack. Daylight savings isn't calculated and tv_nsec
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* is ignored.
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* Timezone calculation compliments of Julian Elischer <julian@elischer.org>.
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*/
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static void
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udf_timetotimespec(struct timestamp *time, struct timespec *t)
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{
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int i, lpyear, daysinyear, year;
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union {
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uint16_t u_tz_offset;
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int16_t s_tz_offset;
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} tz;
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t->tv_nsec = 0;
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/* DirectCD seems to like using bogus year values */
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year = le16toh(time->year);
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if (year < 1970) {
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t->tv_sec = 0;
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return;
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}
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/* Calculate the time and day */
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t->tv_sec = time->second;
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t->tv_sec += time->minute * 60;
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t->tv_sec += time->hour * 3600;
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t->tv_sec += time->day * 3600 * 24;
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/* Calclulate the month */
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lpyear = udf_isaleapyear(year);
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for (i = 1; i < time->month; i++)
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t->tv_sec += mon_lens[lpyear][i] * 3600 * 24;
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/* Speed up the calculation */
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if (year > 1979)
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t->tv_sec += 315532800;
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if (year > 1989)
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t->tv_sec += 315619200;
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if (year > 1999)
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t->tv_sec += 315532800;
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for (i = 2000; i < year; i++) {
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daysinyear = udf_isaleapyear(i) + 365 ;
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t->tv_sec += daysinyear * 3600 * 24;
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}
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/*
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* Calculate the time zone. The timezone is 12 bit signed 2's
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* compliment, so we gotta do some extra magic to handle it right.
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*/
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tz.u_tz_offset = le16toh(time->type_tz);
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tz.u_tz_offset &= 0x0fff;
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if (tz.u_tz_offset & 0x0800)
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tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */
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if ((time->type_tz & 0x1000) && (tz.s_tz_offset != -2047))
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t->tv_sec -= tz.s_tz_offset * 60;
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return;
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}
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static int
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udf_getattr(struct vop_getattr_args *a)
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{
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struct vnode *vp;
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struct udf_node *node;
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struct vattr *vap;
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struct file_entry *fentry;
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struct timespec ts;
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ts.tv_sec = 0;
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vp = a->a_vp;
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vap = a->a_vap;
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node = VTON(vp);
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fentry = node->fentry;
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vap->va_fsid = dev2udev(node->i_dev);
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vap->va_fileid = node->hash_id;
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vap->va_mode = udf_permtomode(node);
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vap->va_nlink = le16toh(fentry->link_cnt);
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/*
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* XXX The spec says that -1 is valid for uid/gid and indicates an
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* invalid uid/gid. How should this be represented?
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*/
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vap->va_uid = (le32toh(fentry->uid) == -1) ? 0 : le32toh(fentry->uid);
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vap->va_gid = (le32toh(fentry->gid) == -1) ? 0 : le32toh(fentry->gid);
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udf_timetotimespec(&fentry->atime, &vap->va_atime);
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udf_timetotimespec(&fentry->mtime, &vap->va_mtime);
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vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */
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vap->va_rdev = 0; /* XXX */
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if (vp->v_type & VDIR) {
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/*
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* Directories that are recorded within their ICB will show
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* as having 0 blocks recorded. Since tradition dictates
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* that directories consume at least one logical block,
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* make it appear so.
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*/
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if (fentry->logblks_rec != 0) {
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vap->va_size =
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le64toh(fentry->logblks_rec) * node->udfmp->bsize;
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} else {
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vap->va_size = node->udfmp->bsize;
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}
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} else {
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vap->va_size = le64toh(fentry->inf_len);
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}
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vap->va_flags = 0;
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vap->va_gen = 1;
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vap->va_blocksize = node->udfmp->bsize;
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vap->va_bytes = le64toh(fentry->inf_len);
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vap->va_type = vp->v_type;
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vap->va_filerev = 0; /* XXX */
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return (0);
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}
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/*
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* File specific ioctls.
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*/
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static int
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udf_ioctl(struct vop_ioctl_args *a)
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{
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printf("%s called\n", __func__);
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return (ENOTTY);
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}
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/*
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* I'm not sure that this has much value in a read-only filesystem, but
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* cd9660 has it too.
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*/
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static int
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udf_pathconf(struct vop_pathconf_args *a)
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{
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switch (a->a_name) {
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case _PC_LINK_MAX:
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*a->a_retval = 65535;
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return (0);
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case _PC_NAME_MAX:
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*a->a_retval = NAME_MAX;
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return (0);
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case _PC_PATH_MAX:
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*a->a_retval = PATH_MAX;
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return (0);
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case _PC_NO_TRUNC:
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*a->a_retval = 1;
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return (0);
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default:
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return (EINVAL);
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}
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}
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static int
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udf_read(struct vop_read_args *a)
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{
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struct vnode *vp = a->a_vp;
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struct uio *uio = a->a_uio;
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struct udf_node *node = VTON(vp);
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struct buf *bp;
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uint8_t *data;
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off_t fsize, offset;
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int error = 0;
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int size;
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if (uio->uio_offset < 0)
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return (EINVAL);
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fsize = le64toh(node->fentry->inf_len);
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while (uio->uio_offset < fsize && uio->uio_resid > 0) {
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offset = uio->uio_offset;
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if (uio->uio_resid + offset <= fsize)
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size = uio->uio_resid;
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else
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size = fsize - offset;
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error = udf_readatoffset(node, &size, offset, &bp, &data);
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if (error == 0)
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error = uiomove(data, size, uio);
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if (bp != NULL)
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brelse(bp);
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if (error)
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break;
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};
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return (error);
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}
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/*
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* Call the OSTA routines to translate the name from a CS0 dstring to a
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* 16-bit Unicode String. Hooks need to be placed in here to translate from
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* Unicode to the encoding that the kernel/user expects. Return the length
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* of the translated string.
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*/
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static int
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udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp)
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{
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unicode_t *transname;
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char *unibuf, *unip;
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int i, unilen = 0, destlen;
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size_t destleft = MAXNAMLEN;
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/* Convert 16-bit Unicode to destname */
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if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) {
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/* allocate a buffer big enough to hold an 8->16 bit expansion */
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unibuf = uma_zalloc(udf_zone_trans, M_WAITOK);
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unip = unibuf;
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if ((unilen = udf_UncompressUnicodeByte(len, cs0string, unibuf)) == -1) {
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printf("udf: Unicode translation failed\n");
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uma_zfree(udf_zone_trans, unibuf);
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return 0;
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}
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while (unilen > 0 && destleft > 0) {
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udf_iconv->conv(udfmp->im_d2l, (const char **)&unibuf,
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(size_t *)&unilen, (char **)&destname, &destleft);
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/* Unconverted character found */
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if (unilen > 0 && destleft > 0) {
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*destname++ = '?';
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destleft--;
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unibuf += 2;
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unilen -= 2;
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}
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}
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uma_zfree(udf_zone_trans, unip);
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*destname = '\0';
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destlen = MAXNAMLEN - (int)destleft;
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} else {
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/* allocate a buffer big enough to hold an 8->16 bit expansion */
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transname = uma_zalloc(udf_zone_trans, M_WAITOK);
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if ((unilen = udf_UncompressUnicode(len, cs0string, transname)) == -1) {
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printf("udf: Unicode translation failed\n");
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uma_zfree(udf_zone_trans, transname);
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return 0;
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}
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for (i = 0; i < unilen ; i++) {
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if (transname[i] & 0xff00) {
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destname[i] = '.'; /* Fudge the 16bit chars */
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} else {
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destname[i] = transname[i] & 0xff;
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}
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}
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uma_zfree(udf_zone_trans, transname);
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destname[unilen] = 0;
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destlen = unilen;
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}
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|
|
return (destlen);
|
|
}
|
|
|
|
/*
|
|
* Compare a CS0 dstring with a name passed in from the VFS layer. Return
|
|
* 0 on a successful match, nonzero therwise. Unicode work may need to be done
|
|
* here also.
|
|
*/
|
|
static int
|
|
udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp)
|
|
{
|
|
char *transname;
|
|
int error = 0;
|
|
|
|
/* This is overkill, but not worth creating a new zone */
|
|
transname = uma_zalloc(udf_zone_trans, M_WAITOK);
|
|
|
|
cs0len = udf_transname(cs0string, transname, cs0len, udfmp);
|
|
|
|
/* Easy check. If they aren't the same length, they aren't equal */
|
|
if ((cs0len == 0) || (cs0len != cmplen))
|
|
error = -1;
|
|
else
|
|
error = bcmp(transname, cmpname, cmplen);
|
|
|
|
uma_zfree(udf_zone_trans, transname);
|
|
return (error);
|
|
}
|
|
|
|
struct udf_uiodir {
|
|
struct dirent *dirent;
|
|
u_long *cookies;
|
|
int ncookies;
|
|
int acookies;
|
|
int eofflag;
|
|
};
|
|
|
|
static int
|
|
udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie)
|
|
{
|
|
if (uiodir->cookies != NULL) {
|
|
if (++uiodir->acookies > uiodir->ncookies) {
|
|
uiodir->eofflag = 0;
|
|
return (-1);
|
|
}
|
|
*uiodir->cookies++ = cookie;
|
|
}
|
|
|
|
if (uio->uio_resid < de_size) {
|
|
uiodir->eofflag = 0;
|
|
return (-1);
|
|
}
|
|
|
|
return (uiomove(uiodir->dirent, de_size, uio));
|
|
}
|
|
|
|
static struct udf_dirstream *
|
|
udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp)
|
|
{
|
|
struct udf_dirstream *ds;
|
|
|
|
ds = uma_zalloc(udf_zone_ds, M_WAITOK | M_ZERO);
|
|
|
|
ds->node = node;
|
|
ds->offset = offset;
|
|
ds->udfmp = udfmp;
|
|
ds->fsize = fsize;
|
|
|
|
return (ds);
|
|
}
|
|
|
|
static struct fileid_desc *
|
|
udf_getfid(struct udf_dirstream *ds)
|
|
{
|
|
struct fileid_desc *fid;
|
|
int error, frag_size = 0, total_fid_size;
|
|
|
|
/* End of directory? */
|
|
if (ds->offset + ds->off >= ds->fsize) {
|
|
ds->error = 0;
|
|
return (NULL);
|
|
}
|
|
|
|
/* Grab the first extent of the directory */
|
|
if (ds->off == 0) {
|
|
ds->size = 0;
|
|
error = udf_readatoffset(ds->node, &ds->size, ds->offset,
|
|
&ds->bp, &ds->data);
|
|
if (error) {
|
|
ds->error = error;
|
|
if (ds->bp != NULL)
|
|
brelse(ds->bp);
|
|
return (NULL);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Clean up from a previous fragmented FID.
|
|
* XXX Is this the right place for this?
|
|
*/
|
|
if (ds->fid_fragment && ds->buf != NULL) {
|
|
ds->fid_fragment = 0;
|
|
FREE(ds->buf, M_UDFFID);
|
|
}
|
|
|
|
fid = (struct fileid_desc*)&ds->data[ds->off];
|
|
|
|
/*
|
|
* Check to see if the fid is fragmented. The first test
|
|
* ensures that we don't wander off the end of the buffer
|
|
* looking for the l_iu and l_fi fields.
|
|
*/
|
|
if (ds->off + UDF_FID_SIZE > ds->size ||
|
|
ds->off + le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE > ds->size){
|
|
|
|
/* Copy what we have of the fid into a buffer */
|
|
frag_size = ds->size - ds->off;
|
|
if (frag_size >= ds->udfmp->bsize) {
|
|
printf("udf: invalid FID fragment\n");
|
|
ds->error = EINVAL;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* File ID descriptors can only be at most one
|
|
* logical sector in size.
|
|
*/
|
|
MALLOC(ds->buf, uint8_t*, ds->udfmp->bsize, M_UDFFID,
|
|
M_WAITOK | M_ZERO);
|
|
bcopy(fid, ds->buf, frag_size);
|
|
|
|
/* Reduce all of the casting magic */
|
|
fid = (struct fileid_desc*)ds->buf;
|
|
|
|
if (ds->bp != NULL)
|
|
brelse(ds->bp);
|
|
|
|
/* Fetch the next allocation */
|
|
ds->offset += ds->size;
|
|
ds->size = 0;
|
|
error = udf_readatoffset(ds->node, &ds->size, ds->offset,
|
|
&ds->bp, &ds->data);
|
|
if (error) {
|
|
ds->error = error;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* If the fragment was so small that we didn't get
|
|
* the l_iu and l_fi fields, copy those in.
|
|
*/
|
|
if (frag_size < UDF_FID_SIZE)
|
|
bcopy(ds->data, &ds->buf[frag_size],
|
|
UDF_FID_SIZE - frag_size);
|
|
|
|
/*
|
|
* Now that we have enough of the fid to work with,
|
|
* copy in the rest of the fid from the new
|
|
* allocation.
|
|
*/
|
|
total_fid_size = UDF_FID_SIZE + le16toh(fid->l_iu) + fid->l_fi;
|
|
if (total_fid_size > ds->udfmp->bsize) {
|
|
printf("udf: invalid FID\n");
|
|
ds->error = EIO;
|
|
return (NULL);
|
|
}
|
|
bcopy(ds->data, &ds->buf[frag_size],
|
|
total_fid_size - frag_size);
|
|
|
|
ds->fid_fragment = 1;
|
|
} else {
|
|
total_fid_size = le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE;
|
|
}
|
|
|
|
/*
|
|
* Update the offset. Align on a 4 byte boundary because the
|
|
* UDF spec says so.
|
|
*/
|
|
ds->this_off = ds->off;
|
|
if (!ds->fid_fragment) {
|
|
ds->off += (total_fid_size + 3) & ~0x03;
|
|
} else {
|
|
ds->off = (total_fid_size - frag_size + 3) & ~0x03;
|
|
}
|
|
|
|
return (fid);
|
|
}
|
|
|
|
static void
|
|
udf_closedir(struct udf_dirstream *ds)
|
|
{
|
|
|
|
if (ds->bp != NULL)
|
|
brelse(ds->bp);
|
|
|
|
if (ds->fid_fragment && ds->buf != NULL)
|
|
FREE(ds->buf, M_UDFFID);
|
|
|
|
uma_zfree(udf_zone_ds, ds);
|
|
}
|
|
|
|
static int
|
|
udf_readdir(struct vop_readdir_args *a)
|
|
{
|
|
struct vnode *vp;
|
|
struct uio *uio;
|
|
struct dirent dir;
|
|
struct udf_node *node;
|
|
struct udf_mnt *udfmp;
|
|
struct fileid_desc *fid;
|
|
struct udf_uiodir uiodir;
|
|
struct udf_dirstream *ds;
|
|
u_long *cookies = NULL;
|
|
int ncookies;
|
|
int error = 0;
|
|
|
|
vp = a->a_vp;
|
|
uio = a->a_uio;
|
|
node = VTON(vp);
|
|
udfmp = node->udfmp;
|
|
uiodir.eofflag = 1;
|
|
|
|
if (a->a_ncookies != NULL) {
|
|
/*
|
|
* Guess how many entries are needed. If we run out, this
|
|
* function will be called again and thing will pick up were
|
|
* it left off.
|
|
*/
|
|
ncookies = uio->uio_resid / 8;
|
|
MALLOC(cookies, u_long *, sizeof(u_long) * ncookies,
|
|
M_TEMP, M_WAITOK);
|
|
if (cookies == NULL)
|
|
return (ENOMEM);
|
|
uiodir.ncookies = ncookies;
|
|
uiodir.cookies = cookies;
|
|
uiodir.acookies = 0;
|
|
} else {
|
|
uiodir.cookies = NULL;
|
|
}
|
|
|
|
/*
|
|
* Iterate through the file id descriptors. Give the parent dir
|
|
* entry special attention.
|
|
*/
|
|
ds = udf_opendir(node, uio->uio_offset, le64toh(node->fentry->inf_len),
|
|
node->udfmp);
|
|
|
|
while ((fid = udf_getfid(ds)) != NULL) {
|
|
|
|
/* XXX Should we return an error on a bad fid? */
|
|
if (udf_checktag(&fid->tag, TAGID_FID)) {
|
|
printf("Invalid FID tag\n");
|
|
hexdump(fid, UDF_FID_SIZE, NULL, 0);
|
|
error = EIO;
|
|
break;
|
|
}
|
|
|
|
/* Is this a deleted file? */
|
|
if (fid->file_char & UDF_FILE_CHAR_DEL)
|
|
continue;
|
|
|
|
if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
|
|
/* Do up the '.' and '..' entries. Dummy values are
|
|
* used for the cookies since the offset here is
|
|
* usually zero, and NFS doesn't like that value
|
|
*/
|
|
dir.d_fileno = node->hash_id;
|
|
dir.d_type = DT_DIR;
|
|
dir.d_name[0] = '.';
|
|
dir.d_name[1] = '\0';
|
|
dir.d_namlen = 1;
|
|
dir.d_reclen = GENERIC_DIRSIZ(&dir);
|
|
uiodir.dirent = &dir;
|
|
error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1);
|
|
if (error)
|
|
break;
|
|
|
|
dir.d_fileno = udf_getid(&fid->icb);
|
|
dir.d_type = DT_DIR;
|
|
dir.d_name[0] = '.';
|
|
dir.d_name[1] = '.';
|
|
dir.d_name[2] = '\0';
|
|
dir.d_namlen = 2;
|
|
dir.d_reclen = GENERIC_DIRSIZ(&dir);
|
|
uiodir.dirent = &dir;
|
|
error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2);
|
|
} else {
|
|
dir.d_namlen = udf_transname(&fid->data[fid->l_iu],
|
|
&dir.d_name[0], fid->l_fi, udfmp);
|
|
dir.d_fileno = udf_getid(&fid->icb);
|
|
dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ?
|
|
DT_DIR : DT_UNKNOWN;
|
|
dir.d_reclen = GENERIC_DIRSIZ(&dir);
|
|
uiodir.dirent = &dir;
|
|
error = udf_uiodir(&uiodir, dir.d_reclen, uio,
|
|
ds->this_off);
|
|
}
|
|
if (error) {
|
|
printf("uiomove returned %d\n", error);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
/* tell the calling layer whether we need to be called again */
|
|
*a->a_eofflag = uiodir.eofflag;
|
|
uio->uio_offset = ds->offset + ds->off;
|
|
|
|
if (!error)
|
|
error = ds->error;
|
|
|
|
udf_closedir(ds);
|
|
|
|
if (a->a_ncookies != NULL) {
|
|
if (error)
|
|
FREE(cookies, M_TEMP);
|
|
else {
|
|
*a->a_ncookies = uiodir.acookies;
|
|
*a->a_cookies = cookies;
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/* Are there any implementations out there that do soft-links? */
|
|
static int
|
|
udf_readlink(struct vop_readlink_args *ap)
|
|
{
|
|
printf("%s called\n", __func__);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
static int
|
|
udf_strategy(struct vop_strategy_args *a)
|
|
{
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
struct udf_node *node;
|
|
int maxsize;
|
|
struct bufobj *bo;
|
|
|
|
bp = a->a_bp;
|
|
vp = a->a_vp;
|
|
node = VTON(vp);
|
|
|
|
/* cd9660 has this test reversed, but it seems more logical this way */
|
|
if (bp->b_blkno != bp->b_lblkno) {
|
|
/*
|
|
* Files that are embedded in the fentry don't translate well
|
|
* to a block number. Reject.
|
|
*/
|
|
if (udf_bmap_internal(node, bp->b_lblkno * node->udfmp->bsize,
|
|
&bp->b_lblkno, &maxsize)) {
|
|
clrbuf(bp);
|
|
bp->b_blkno = -1;
|
|
}
|
|
}
|
|
if ((long)bp->b_blkno == -1) {
|
|
bufdone(bp);
|
|
return (0);
|
|
}
|
|
bo = node->udfmp->im_bo;
|
|
bp->b_iooffset = dbtob(bp->b_blkno);
|
|
BO_STRATEGY(bo, bp);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
udf_bmap(struct vop_bmap_args *a)
|
|
{
|
|
struct udf_node *node;
|
|
uint32_t max_size;
|
|
daddr_t lsector;
|
|
int error;
|
|
|
|
node = VTON(a->a_vp);
|
|
|
|
if (a->a_bop != NULL)
|
|
*a->a_bop = &node->i_devvp->v_bufobj;
|
|
if (a->a_bnp == NULL)
|
|
return (0);
|
|
if (a->a_runb)
|
|
*a->a_runb = 0;
|
|
|
|
error = udf_bmap_internal(node, a->a_bn * node->udfmp->bsize, &lsector,
|
|
&max_size);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* Translate logical to physical sector number */
|
|
*a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT);
|
|
|
|
/* Punt on read-ahead for now */
|
|
if (a->a_runp)
|
|
*a->a_runp = 0;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The all powerful VOP_LOOKUP().
|
|
*/
|
|
static int
|
|
udf_lookup(struct vop_cachedlookup_args *a)
|
|
{
|
|
struct vnode *dvp;
|
|
struct vnode *tdp = NULL;
|
|
struct vnode **vpp = a->a_vpp;
|
|
struct udf_node *node;
|
|
struct udf_mnt *udfmp;
|
|
struct fileid_desc *fid = NULL;
|
|
struct udf_dirstream *ds;
|
|
struct thread *td;
|
|
u_long nameiop;
|
|
u_long flags;
|
|
char *nameptr;
|
|
long namelen;
|
|
ino_t id = 0;
|
|
int offset, error = 0;
|
|
int numdirpasses, fsize;
|
|
|
|
dvp = a->a_dvp;
|
|
node = VTON(dvp);
|
|
udfmp = node->udfmp;
|
|
nameiop = a->a_cnp->cn_nameiop;
|
|
flags = a->a_cnp->cn_flags;
|
|
nameptr = a->a_cnp->cn_nameptr;
|
|
namelen = a->a_cnp->cn_namelen;
|
|
fsize = le64toh(node->fentry->inf_len);
|
|
td = a->a_cnp->cn_thread;
|
|
|
|
/*
|
|
* If this is a LOOKUP and we've already partially searched through
|
|
* the directory, pick up where we left off and flag that the
|
|
* directory may need to be searched twice. For a full description,
|
|
* see /sys/isofs/cd9660/cd9660_lookup.c:cd9660_lookup()
|
|
*/
|
|
if (nameiop != LOOKUP || node->diroff == 0 || node->diroff > fsize) {
|
|
offset = 0;
|
|
numdirpasses = 1;
|
|
} else {
|
|
offset = node->diroff;
|
|
numdirpasses = 2;
|
|
nchstats.ncs_2passes++;
|
|
}
|
|
|
|
lookloop:
|
|
ds = udf_opendir(node, offset, fsize, udfmp);
|
|
|
|
while ((fid = udf_getfid(ds)) != NULL) {
|
|
|
|
/* XXX Should we return an error on a bad fid? */
|
|
if (udf_checktag(&fid->tag, TAGID_FID)) {
|
|
printf("udf_lookup: Invalid tag\n");
|
|
error = EIO;
|
|
break;
|
|
}
|
|
|
|
/* Is this a deleted file? */
|
|
if (fid->file_char & UDF_FILE_CHAR_DEL)
|
|
continue;
|
|
|
|
if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
|
|
if (flags & ISDOTDOT) {
|
|
id = udf_getid(&fid->icb);
|
|
break;
|
|
}
|
|
} else {
|
|
if (!(udf_cmpname(&fid->data[fid->l_iu],
|
|
nameptr, fid->l_fi, namelen, udfmp))) {
|
|
id = udf_getid(&fid->icb);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!error)
|
|
error = ds->error;
|
|
|
|
/* XXX Bail out here? */
|
|
if (error) {
|
|
udf_closedir(ds);
|
|
return (error);
|
|
}
|
|
|
|
/* Did we have a match? */
|
|
if (id) {
|
|
error = udf_vget(udfmp->im_mountp, id, LK_EXCLUSIVE, &tdp);
|
|
if (!error) {
|
|
/*
|
|
* Remember where this entry was if it's the final
|
|
* component.
|
|
*/
|
|
if ((flags & ISLASTCN) && nameiop == LOOKUP)
|
|
node->diroff = ds->offset + ds->off;
|
|
if (numdirpasses == 2)
|
|
nchstats.ncs_pass2++;
|
|
if (!(flags & LOCKPARENT) || !(flags & ISLASTCN)) {
|
|
a->a_cnp->cn_flags |= PDIRUNLOCK;
|
|
VOP_UNLOCK(dvp, 0, td);
|
|
}
|
|
|
|
*vpp = tdp;
|
|
|
|
/* Put this entry in the cache */
|
|
if (flags & MAKEENTRY)
|
|
cache_enter(dvp, *vpp, a->a_cnp);
|
|
}
|
|
} else {
|
|
/* Name wasn't found on this pass. Do another pass? */
|
|
if (numdirpasses == 2) {
|
|
numdirpasses--;
|
|
offset = 0;
|
|
udf_closedir(ds);
|
|
goto lookloop;
|
|
}
|
|
|
|
/* Enter name into cache as non-existant */
|
|
if (flags & MAKEENTRY)
|
|
cache_enter(dvp, *vpp, a->a_cnp);
|
|
|
|
if ((flags & ISLASTCN) &&
|
|
(nameiop == CREATE || nameiop == RENAME)) {
|
|
error = EROFS;
|
|
} else {
|
|
error = ENOENT;
|
|
}
|
|
}
|
|
|
|
udf_closedir(ds);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
udf_reclaim(struct vop_reclaim_args *a)
|
|
{
|
|
struct vnode *vp;
|
|
struct udf_node *unode;
|
|
|
|
vp = a->a_vp;
|
|
unode = VTON(vp);
|
|
|
|
if (unode != NULL) {
|
|
udf_hashrem(unode);
|
|
if (unode->i_devvp) {
|
|
vrele(unode->i_devvp);
|
|
unode->i_devvp = 0;
|
|
}
|
|
|
|
if (unode->fentry != NULL)
|
|
FREE(unode->fentry, M_UDFFENTRY);
|
|
uma_zfree(udf_zone_node, unode);
|
|
vp->v_data = NULL;
|
|
}
|
|
vnode_destroy_vobject(vp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Read the block and then set the data pointer to correspond with the
|
|
* offset passed in. Only read in at most 'size' bytes, and then set 'size'
|
|
* to the number of bytes pointed to. If 'size' is zero, try to read in a
|
|
* whole extent.
|
|
*
|
|
* Note that *bp may be assigned error or not.
|
|
*
|
|
*/
|
|
static int
|
|
udf_readatoffset(struct udf_node *node, int *size, off_t offset,
|
|
struct buf **bp, uint8_t **data)
|
|
{
|
|
struct udf_mnt *udfmp;
|
|
struct file_entry *fentry = NULL;
|
|
struct buf *bp1;
|
|
uint32_t max_size;
|
|
daddr_t sector;
|
|
int error;
|
|
|
|
udfmp = node->udfmp;
|
|
|
|
*bp = NULL;
|
|
error = udf_bmap_internal(node, offset, §or, &max_size);
|
|
if (error == UDF_INVALID_BMAP) {
|
|
/*
|
|
* This error means that the file *data* is stored in the
|
|
* allocation descriptor field of the file entry.
|
|
*/
|
|
fentry = node->fentry;
|
|
*data = &fentry->data[le32toh(fentry->l_ea)];
|
|
*size = le32toh(fentry->l_ad);
|
|
return (0);
|
|
} else if (error != 0) {
|
|
return (error);
|
|
}
|
|
|
|
/* Adjust the size so that it is within range */
|
|
if (*size == 0 || *size > max_size)
|
|
*size = max_size;
|
|
*size = min(*size, MAXBSIZE);
|
|
|
|
if ((error = udf_readlblks(udfmp, sector, *size, bp))) {
|
|
printf("warning: udf_readlblks returned error %d\n", error);
|
|
/* note: *bp may be non-NULL */
|
|
return (error);
|
|
}
|
|
|
|
bp1 = *bp;
|
|
*data = (uint8_t *)&bp1->b_data[offset % udfmp->bsize];
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Translate a file offset into a logical block and then into a physical
|
|
* block.
|
|
*/
|
|
static int
|
|
udf_bmap_internal(struct udf_node *node, off_t offset, daddr_t *sector,
|
|
uint32_t *max_size)
|
|
{
|
|
struct udf_mnt *udfmp;
|
|
struct file_entry *fentry;
|
|
void *icb;
|
|
struct icb_tag *tag;
|
|
uint32_t icblen = 0;
|
|
daddr_t lsector;
|
|
int ad_offset, ad_num = 0;
|
|
int i, p_offset;
|
|
|
|
udfmp = node->udfmp;
|
|
fentry = node->fentry;
|
|
tag = &fentry->icbtag;
|
|
|
|
switch (le16toh(tag->strat_type)) {
|
|
case 4:
|
|
break;
|
|
|
|
case 4096:
|
|
printf("Cannot deal with strategy4096 yet!\n");
|
|
return (ENODEV);
|
|
|
|
default:
|
|
printf("Unknown strategy type %d\n", tag->strat_type);
|
|
return (ENODEV);
|
|
}
|
|
|
|
switch (le16toh(tag->flags) & 0x7) {
|
|
case 0:
|
|
/*
|
|
* The allocation descriptor field is filled with short_ad's.
|
|
* If the offset is beyond the current extent, look for the
|
|
* next extent.
|
|
*/
|
|
do {
|
|
offset -= icblen;
|
|
ad_offset = sizeof(struct short_ad) * ad_num;
|
|
if (ad_offset > le32toh(fentry->l_ad)) {
|
|
printf("File offset out of bounds\n");
|
|
return (EINVAL);
|
|
}
|
|
icb = GETICB(short_ad, fentry,
|
|
le32toh(fentry->l_ea) + ad_offset);
|
|
icblen = GETICBLEN(short_ad, icb);
|
|
ad_num++;
|
|
} while(offset >= icblen);
|
|
|
|
lsector = (offset >> udfmp->bshift) +
|
|
((struct short_ad *)(icb))->pos;
|
|
|
|
*max_size = GETICBLEN(short_ad, icb);
|
|
|
|
break;
|
|
case 1:
|
|
/*
|
|
* The allocation descriptor field is filled with long_ad's
|
|
* If the offset is beyond the current extent, look for the
|
|
* next extent.
|
|
*/
|
|
do {
|
|
offset -= icblen;
|
|
ad_offset = sizeof(struct long_ad) * ad_num;
|
|
if (ad_offset > le32toh(fentry->l_ad)) {
|
|
printf("File offset out of bounds\n");
|
|
return (EINVAL);
|
|
}
|
|
icb = GETICB(long_ad, fentry,
|
|
le32toh(fentry->l_ea) + ad_offset);
|
|
icblen = GETICBLEN(long_ad, icb);
|
|
ad_num++;
|
|
} while(offset >= icblen);
|
|
|
|
lsector = (offset >> udfmp->bshift) +
|
|
le32toh(((struct long_ad *)(icb))->loc.lb_num);
|
|
|
|
*max_size = GETICBLEN(long_ad, icb);
|
|
|
|
break;
|
|
case 3:
|
|
/*
|
|
* This type means that the file *data* is stored in the
|
|
* allocation descriptor field of the file entry.
|
|
*/
|
|
*max_size = 0;
|
|
*sector = node->hash_id + udfmp->part_start;
|
|
|
|
return (UDF_INVALID_BMAP);
|
|
case 2:
|
|
/* DirectCD does not use extended_ad's */
|
|
default:
|
|
printf("Unsupported allocation descriptor %d\n",
|
|
tag->flags & 0x7);
|
|
return (ENODEV);
|
|
}
|
|
|
|
*sector = lsector + udfmp->part_start;
|
|
|
|
/*
|
|
* Check the sparing table. Each entry represents the beginning of
|
|
* a packet.
|
|
*/
|
|
if (udfmp->s_table != NULL) {
|
|
for (i = 0; i< udfmp->s_table_entries; i++) {
|
|
p_offset =
|
|
lsector - le32toh(udfmp->s_table->entries[i].org);
|
|
if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) {
|
|
*sector =
|
|
le32toh(udfmp->s_table->entries[i].map) +
|
|
p_offset;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|