2 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/fs/udf/udf_vnops.c,v 1.33 2003/12/07 05:04:49 scottl Exp $
30 /* Take care of the vnode side of things */
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/namei.h>
35 #include <sys/kernel.h>
36 #include <sys/malloc.h>
38 #include <sys/module.h>
40 #include <sys/iconv.h>
41 #include <sys/mount.h>
42 #include <sys/vnode.h>
43 #include <sys/dirent.h>
44 #include <sys/queue.h>
45 #include <sys/unistd.h>
47 #include <machine/inttypes.h>
51 #include <vfs/udf/ecma167-udf.h>
52 #include <vfs/udf/osta.h>
53 #include <vfs/udf/udf.h>
54 #include <vfs/udf/udf_mount.h>
56 static int udf_access(struct vop_access_args *);
57 static int udf_getattr(struct vop_getattr_args *);
58 static int udf_ioctl(struct vop_ioctl_args *);
59 static int udf_pathconf(struct vop_pathconf_args *);
60 static int udf_read(struct vop_read_args *);
61 static int udf_readdir(struct vop_readdir_args *);
62 static int udf_readlink(struct vop_readlink_args *ap);
63 static int udf_strategy(struct vop_strategy_args *);
64 static int udf_bmap(struct vop_bmap_args *);
65 static int udf_lookup(struct vop_old_lookup_args *);
66 static int udf_reclaim(struct vop_reclaim_args *);
67 static int udf_readatoffset(struct udf_node *, int *, int, struct buf **, uint8_t **);
68 static int udf_bmap_internal(struct udf_node *, uint32_t, daddr_t *, uint32_t *);
70 struct vop_ops udf_vnode_vops = {
71 .vop_default = vop_defaultop,
72 .vop_access = udf_access,
74 .vop_old_lookup = udf_lookup,
75 .vop_getattr = udf_getattr,
76 .vop_ioctl = udf_ioctl,
77 .vop_pathconf = udf_pathconf,
79 .vop_readdir = udf_readdir,
80 .vop_readlink = udf_readlink,
81 .vop_reclaim = udf_reclaim,
82 .vop_strategy = udf_strategy
85 MALLOC_DEFINE(M_UDFFID, "UDF FID", "UDF FileId structure");
86 MALLOC_DEFINE(M_UDFDS, "UDF DS", "UDF Dirstream structure");
88 #define UDF_INVALID_BMAP -1
90 /* Look up a udf_node based on the ino_t passed in and return it's vnode */
92 udf_hashlookup(struct udf_mnt *udfmp, ino_t id, struct vnode **vpp)
94 struct udf_node *node;
95 struct udf_hash_lh *lh;
100 lwkt_gettoken(&udfmp->hash_token);
102 lh = &udfmp->hashtbl[id % udfmp->hashsz];
104 lwkt_reltoken(&udfmp->hash_token);
107 LIST_FOREACH(node, lh, le) {
108 if (node->hash_id != id)
111 if (vget(vp, LK_EXCLUSIVE))
114 * We must check to see if the inode has been ripped
115 * out from under us after blocking.
117 lh = &udfmp->hashtbl[id % udfmp->hashsz];
118 LIST_FOREACH(node, lh, le) {
119 if (node->hash_id == id)
122 if (node == NULL || vp != node->i_vnode) {
126 lwkt_reltoken(&udfmp->hash_token);
131 lwkt_reltoken(&udfmp->hash_token);
136 udf_hashins(struct udf_node *node)
138 struct udf_mnt *udfmp;
139 struct udf_hash_lh *lh;
143 lwkt_gettoken(&udfmp->hash_token);
144 lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz];
145 LIST_INSERT_HEAD(lh, node, le);
146 lwkt_reltoken(&udfmp->hash_token);
152 udf_hashrem(struct udf_node *node)
154 struct udf_mnt *udfmp;
155 struct udf_hash_lh *lh;
159 lwkt_gettoken(&udfmp->hash_token);
160 lh = &udfmp->hashtbl[node->hash_id % udfmp->hashsz];
162 panic("hash entry is NULL, node->hash_id= %"PRId64, node->hash_id);
163 LIST_REMOVE(node, le);
164 lwkt_reltoken(&udfmp->hash_token);
170 udf_allocv(struct mount *mp, struct vnode **vpp)
175 error = getnewvnode(VT_UDF, mp, &vp, 0, 0);
177 kprintf("udf_allocv: failed to allocate new vnode\n");
185 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */
187 udf_permtomode(struct udf_node *node)
193 perm = node->fentry->perm;
194 flags = node->fentry->icbtag.flags;
196 mode = perm & UDF_FENTRY_PERM_USER_MASK;
197 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2);
198 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4);
199 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4);
200 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6);
201 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8);
207 udf_access(struct vop_access_args *a)
210 struct udf_node *node;
214 KKASSERT(vp->v_mount->mnt_flag & MNT_RDONLY);
215 return (vop_helper_access(a, node->fentry->uid, node->fentry->gid,
216 udf_permtomode(node), 0));
219 static int mon_lens[2][12] = {
220 {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
221 {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
225 udf_isaleapyear(int year)
229 i = (year % 4) ? 0 : 1;
230 i &= (year % 100) ? 1 : 0;
231 i |= (year % 400) ? 0 : 1;
237 * XXX This is just a rough hack. Daylight savings isn't calculated and tv_nsec
239 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>.
242 udf_timetotimespec(struct timestamp *time, struct timespec *t)
244 int i, lpyear, daysinyear;
246 uint16_t u_tz_offset;
252 /* DirectCD seems to like using bogus year values */
253 if (time->year < 1970) {
258 /* Calculate the time and day */
259 t->tv_sec = time->second;
260 t->tv_sec += time->minute * 60;
261 t->tv_sec += time->hour * 3600;
262 t->tv_sec += time->day * 3600 * 24;
264 /* Calclulate the month */
265 lpyear = udf_isaleapyear(time->year);
266 for (i = 1; i < time->month; i++)
267 t->tv_sec += mon_lens[lpyear][i] * 3600 * 24;
269 /* Speed up the calculation */
270 if (time->year > 1979)
271 t->tv_sec += 315532800;
272 if (time->year > 1989)
273 t->tv_sec += 315619200;
274 if (time->year > 1999)
275 t->tv_sec += 315532800;
276 for (i = 2000; i < time->year; i++) {
277 daysinyear = udf_isaleapyear(i) + 365 ;
278 t->tv_sec += daysinyear * 3600 * 24;
282 * Calculate the time zone. The timezone is 12 bit signed 2's
283 * compliment, so we gotta do some extra magic to handle it right.
285 tz.u_tz_offset = time->type_tz;
286 tz.u_tz_offset &= 0x0fff;
287 if (tz.u_tz_offset & 0x0800)
288 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */
289 if ((time->type_tz & 0x1000) && (tz.s_tz_offset != -2047))
290 t->tv_sec -= tz.s_tz_offset * 60;
296 udf_getattr(struct vop_getattr_args *a)
299 struct udf_node *node;
301 struct file_entry *fentry;
306 fentry = node->fentry;
308 vap->va_fsid = dev2udev(node->i_dev);
309 vap->va_fileid = node->hash_id;
310 vap->va_mode = udf_permtomode(node);
311 vap->va_nlink = fentry->link_cnt;
313 * XXX The spec says that -1 is valid for uid/gid and indicates an
314 * invalid uid/gid. How should this be represented?
316 vap->va_uid = (fentry->uid == 0xffffffff) ? 0 : fentry->uid;
317 vap->va_gid = (fentry->gid == 0xffffffff) ? 0 : fentry->gid;
318 udf_timetotimespec(&fentry->atime, &vap->va_atime);
319 udf_timetotimespec(&fentry->mtime, &vap->va_mtime);
320 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */
321 vap->va_rmajor = VNOVAL;
322 vap->va_rminor = VNOVAL;
323 if (vp->v_type & VDIR) {
325 * Directories that are recorded within their ICB will show
326 * as having 0 blocks recorded. Since tradition dictates
327 * that directories consume at least one logical block,
330 if (fentry->logblks_rec != 0)
331 vap->va_size = fentry->logblks_rec * node->udfmp->bsize;
333 vap->va_size = node->udfmp->bsize;
335 vap->va_size = fentry->inf_len;
338 vap->va_blocksize = node->udfmp->bsize;
339 vap->va_bytes = fentry->inf_len;
340 vap->va_type = vp->v_type;
341 vap->va_filerev = 0; /* XXX */
346 * File specific ioctls. DeCSS candidate?
349 udf_ioctl(struct vop_ioctl_args *a)
351 kprintf("%s called\n", __func__);
356 * I'm not sure that this has much value in a read-only filesystem, but
360 udf_pathconf(struct vop_pathconf_args *a)
365 *a->a_retval = 65535;
368 *a->a_retval = NAME_MAX;
371 *a->a_retval = PATH_MAX;
382 udf_read(struct vop_read_args *a)
384 struct vnode *vp = a->a_vp;
385 struct uio *uio = a->a_uio;
386 struct udf_node *node = VTON(vp);
390 int size, fsize, offset;
392 if (uio->uio_offset < 0)
395 fsize = node->fentry->inf_len;
397 while (uio->uio_offset < fsize && uio->uio_resid > 0) {
398 offset = uio->uio_offset;
399 size = uio->uio_resid;
400 error = udf_readatoffset(node, &size, offset, &bp, &data);
402 error = uiomove(data, size, uio);
413 * Call the OSTA routines to translate the name from a CS0 dstring to a
414 * 16-bit Unicode String. Hooks need to be placed in here to translate from
415 * Unicode to the encoding that the kernel/user expects. Return the length
416 * of the translated string.
419 udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp)
421 unicode_t *transname;
422 int i, unilen = 0, destlen;
424 /* Convert 16-bit Unicode to destname */
425 /* allocate a buffer big enough to hold an 8->16 bit expansion */
426 transname = kmalloc(NAME_MAX * sizeof(unicode_t), M_TEMP, M_WAITOK | M_ZERO);
428 if ((unilen = udf_UncompressUnicode(len, cs0string, transname)) == -1) {
429 kprintf("udf: Unicode translation failed\n");
430 kfree(transname, M_TEMP);
434 for (i = 0; i < unilen ; i++)
435 if (transname[i] & 0xff00)
436 destname[i] = '.'; /* Fudge the 16bit chars */
438 destname[i] = transname[i] & 0xff;
439 kfree(transname, M_TEMP);
440 destname[unilen] = 0;
447 * Compare a CS0 dstring with a name passed in from the VFS layer. Return
448 * 0 on a successful match, nonzero therwise. Unicode work may need to be done
452 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp)
457 /* This is overkill, but not worth creating a new zone */
459 transname = kmalloc(NAME_MAX * sizeof(unicode_t), M_TEMP,
462 cs0len = udf_transname(cs0string, transname, cs0len, udfmp);
464 /* Easy check. If they aren't the same length, they aren't equal */
465 if ((cs0len == 0) || (cs0len != cmplen))
468 error = bcmp(transname, cmpname, cmplen);
470 kfree(transname, M_TEMP);
475 struct dirent *dirent;
482 static struct udf_dirstream *
483 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp)
485 struct udf_dirstream *ds;
487 ds = kmalloc(sizeof(*ds), M_UDFDS, M_WAITOK | M_ZERO);
497 static struct fileid_desc *
498 udf_getfid(struct udf_dirstream *ds)
500 struct fileid_desc *fid;
501 int error, frag_size = 0, total_fid_size;
503 /* End of directory? */
504 if (ds->offset + ds->off >= ds->fsize) {
509 /* Grab the first extent of the directory */
514 error = udf_readatoffset(ds->node, &ds->size, ds->offset,
523 * Clean up from a previous fragmented FID.
524 * XXX Is this the right place for this?
526 if (ds->fid_fragment && ds->buf != NULL) {
527 ds->fid_fragment = 0;
528 kfree(ds->buf, M_UDFFID);
531 fid = (struct fileid_desc*)&ds->data[ds->off];
534 * Check to see if the fid is fragmented. The first test
535 * ensures that we don't wander off the end of the buffer
536 * looking for the l_iu and l_fi fields.
538 if (ds->off + UDF_FID_SIZE > ds->size ||
539 ds->off + fid->l_iu + fid->l_fi + UDF_FID_SIZE > ds->size) {
541 /* Copy what we have of the fid into a buffer */
542 frag_size = ds->size - ds->off;
543 if (frag_size >= ds->udfmp->bsize) {
544 kprintf("udf: invalid FID fragment\n");
550 * File ID descriptors can only be at most one
551 * logical sector in size.
553 ds->buf = kmalloc(ds->udfmp->bsize, M_UDFFID, M_WAITOK | M_ZERO);
554 bcopy(fid, ds->buf, frag_size);
556 /* Reduce all of the casting magic */
557 fid = (struct fileid_desc*)ds->buf;
562 /* Fetch the next allocation */
563 ds->offset += ds->size;
565 error = udf_readatoffset(ds->node, &ds->size, ds->offset,
573 * If the fragment was so small that we didn't get
574 * the l_iu and l_fi fields, copy those in.
576 if (frag_size < UDF_FID_SIZE)
577 bcopy(ds->data, &ds->buf[frag_size],
578 UDF_FID_SIZE - frag_size);
581 * Now that we have enough of the fid to work with,
582 * copy in the rest of the fid from the new
585 total_fid_size = UDF_FID_SIZE + fid->l_iu + fid->l_fi;
586 if (total_fid_size > ds->udfmp->bsize) {
587 kprintf("udf: invalid FID\n");
591 bcopy(ds->data, &ds->buf[frag_size],
592 total_fid_size - frag_size);
594 ds->fid_fragment = 1;
596 total_fid_size = fid->l_iu + fid->l_fi + UDF_FID_SIZE;
599 * Update the offset. Align on a 4 byte boundary because the
602 ds->this_off = ds->off;
603 if (!ds->fid_fragment)
604 ds->off += (total_fid_size + 3) & ~0x03;
606 ds->off = (total_fid_size - frag_size + 3) & ~0x03;
612 udf_closedir(struct udf_dirstream *ds)
618 if (ds->fid_fragment && ds->buf != NULL)
619 kfree(ds->buf, M_UDFFID);
625 udf_readdir(struct vop_readdir_args *a)
629 struct udf_node *node;
630 struct udf_mnt *udfmp;
631 struct fileid_desc *fid;
632 struct udf_uiodir uiodir;
633 struct udf_dirstream *ds;
634 off_t *cookies = NULL;
641 if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0)
649 if (a->a_ncookies != NULL) {
651 * Guess how many entries are needed. If we run out, this
652 * function will be called again and thing will pick up were
655 ncookies = uio->uio_resid / 8 + 1;
658 cookies = kmalloc(sizeof(off_t) * ncookies, M_TEMP, M_WAITOK);
659 uiodir.ncookies = ncookies;
660 uiodir.cookies = cookies;
663 uiodir.cookies = NULL;
668 * Iterate through the file id descriptors. Give the parent dir
669 * entry special attention.
671 ds = udf_opendir(node, uio->uio_offset, node->fentry->inf_len,
674 name = kmalloc(NAME_MAX, M_TEMP, M_WAITOK);
676 while ((fid = udf_getfid(ds)) != NULL) {
678 /* XXX Should we return an error on a bad fid? */
679 if (udf_checktag(&fid->tag, TAGID_FID)) {
680 kprintf("Invalid FID tag\n");
685 /* Is this a deleted file? */
686 if (fid->file_char & UDF_FILE_CHAR_DEL)
689 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
690 /* Do up the '.' and '..' entries. Dummy values are
691 * used for the cookies since the offset here is
692 * usually zero, and NFS doesn't like that value
694 if (uiodir.cookies != NULL) {
695 if (++uiodir.acookies > uiodir.ncookies) {
699 *uiodir.cookies++ = 1;
701 if (vop_write_dirent(&error, uio, node->hash_id, DT_DIR,
710 if (uiodir.cookies != NULL) {
711 if (++uiodir.acookies > uiodir.ncookies) {
715 *uiodir.cookies++ = 2;
717 if (vop_write_dirent(&error, uio, udf_getid(&fid->icb),
727 uint8_t d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ?
729 uint16_t namelen = udf_transname(&fid->data[fid->l_iu],
730 name, fid->l_fi, udfmp);
732 if (uiodir.cookies != NULL) {
733 if (++uiodir.acookies > uiodir.ncookies) {
737 *uiodir.cookies++ = ds->this_off;
739 if (vop_write_dirent(&error, uio, udf_getid(&fid->icb),
740 d_type, namelen, name)) {
750 kprintf("uiomove returned %d\n", error);
758 /* tell the calling layer whether we need to be called again */
759 *a->a_eofflag = uiodir.eofflag;
760 uio->uio_offset = ds->offset + ds->off;
767 if (a->a_ncookies != NULL) {
769 kfree(cookies, M_TEMP);
771 *a->a_ncookies = uiodir.acookies;
772 *a->a_cookies = cookies;
780 /* Are there any implementations out there that do soft-links? */
782 udf_readlink(struct vop_readlink_args *ap)
784 kprintf("%s called\n", __func__);
789 udf_strategy(struct vop_strategy_args *ap)
795 struct udf_node *node;
804 nbio = push_bio(bio);
805 if (nbio->bio_offset == NOOFFSET) {
807 * Files that are embedded in the fentry don't translate well
808 * to a block number. Reject.
810 if (udf_bmap_internal(node,
812 &dblkno, &maxsize)) {
814 nbio->bio_offset = NOOFFSET;
816 nbio->bio_offset = dbtob(dblkno);
819 if (nbio->bio_offset == NOOFFSET) {
820 /* I/O was never started on nbio, must biodone(bio) */
824 vn_strategy(node->i_devvp, nbio);
829 udf_bmap(struct vop_bmap_args *a)
831 struct udf_node *node;
836 node = VTON(a->a_vp);
838 if (a->a_doffsetp == NULL)
841 KKASSERT(a->a_loffset % node->udfmp->bsize == 0);
843 error = udf_bmap_internal(node, a->a_loffset, &lsector, &max_size);
847 /* Translate logical to physical sector number */
848 *a->a_doffsetp = (off_t)lsector << node->udfmp->bshift;
850 /* Punt on read-ahead for now */
859 * The all powerful VOP_LOOKUP().
862 udf_lookup(struct vop_old_lookup_args *a)
865 struct vnode *tdp = NULL;
866 struct vnode **vpp = a->a_vpp;
867 struct udf_node *node;
868 struct udf_mnt *udfmp;
869 struct fileid_desc *fid = NULL;
870 struct udf_dirstream *ds;
876 int offset, error = 0;
877 int numdirpasses, fsize;
882 nameiop = a->a_cnp->cn_nameiop;
883 flags = a->a_cnp->cn_flags;
884 nameptr = a->a_cnp->cn_nameptr;
885 namelen = a->a_cnp->cn_namelen;
886 fsize = node->fentry->inf_len;
891 * If this is a LOOKUP and we've already partially searched through
892 * the directory, pick up where we left off and flag that the
893 * directory may need to be searched twice. For a full description,
894 * see /sys/isofs/cd9660/cd9660_lookup.c:cd9660_lookup()
896 if (nameiop != NAMEI_LOOKUP || node->diroff == 0 ||
897 node->diroff > fsize) {
901 offset = node->diroff;
906 ds = udf_opendir(node, offset, fsize, udfmp);
908 while ((fid = udf_getfid(ds)) != NULL) {
909 /* XXX Should we return an error on a bad fid? */
910 if (udf_checktag(&fid->tag, TAGID_FID)) {
911 kprintf("udf_lookup: Invalid tag\n");
916 /* Is this a deleted file? */
917 if (fid->file_char & UDF_FILE_CHAR_DEL)
920 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
921 if (flags & CNP_ISDOTDOT) {
922 id = udf_getid(&fid->icb);
926 if (!(udf_cmpname(&fid->data[fid->l_iu],
927 nameptr, fid->l_fi, namelen, udfmp))) {
928 id = udf_getid(&fid->icb);
937 /* XXX Bail out here? */
943 /* Did we have a match? */
945 error = udf_vget(udfmp->im_mountp, NULL, id, &tdp);
948 * Remember where this entry was if it's the final
951 if (nameiop == NAMEI_LOOKUP)
952 node->diroff = ds->offset + ds->off;
953 if ((flags & CNP_LOCKPARENT) == 0) {
954 a->a_cnp->cn_flags |= CNP_PDIRUNLOCK;
961 /* Name wasn't found on this pass. Do another pass? */
962 if (numdirpasses == 2) {
968 if (nameiop == NAMEI_CREATE || nameiop == NAMEI_RENAME) {
980 udf_reclaim(struct vop_reclaim_args *a)
983 struct udf_node *unode;
990 if (unode->i_devvp) {
991 vrele(unode->i_devvp);
995 if (unode->fentry != NULL)
996 kfree(unode->fentry, M_UDFFENTRY);
997 kfree(unode, M_UDFNODE);
1005 * Read the block and then set the data pointer to correspond with the
1006 * offset passed in. Only read in at most 'size' bytes, and then set 'size'
1007 * to the number of bytes pointed to. If 'size' is zero, try to read in a
1010 * Note that *bp may be assigned error or not.
1012 * XXX 'size' is limited to the logical block size for now due to problems
1016 udf_readatoffset(struct udf_node *node, int *size, int offset, struct buf **bp,
1019 struct udf_mnt *udfmp;
1020 struct file_entry *fentry = NULL;
1026 udfmp = node->udfmp;
1029 error = udf_bmap_internal(node, offset, §or, &max_size);
1030 if (error == UDF_INVALID_BMAP) {
1032 * This error means that the file *data* is stored in the
1033 * allocation descriptor field of the file entry.
1035 fentry = node->fentry;
1036 *data = &fentry->data[fentry->l_ea];
1037 *size = fentry->l_ad;
1039 } else if (error != 0) {
1043 /* Adjust the size so that it is within range */
1044 if (*size == 0 || *size > max_size)
1046 *size = min(*size, MAXBSIZE);
1048 if ((error = udf_readlblks(udfmp, sector, *size, bp))) {
1049 kprintf("warning: udf_readlblks returned error %d\n", error);
1050 /* note: *bp may be non-NULL */
1055 *data = (uint8_t *)&bp1->b_data[offset % udfmp->bsize];
1060 * Translate a file offset into a logical block and then into a physical
1064 udf_bmap_internal(struct udf_node *node, uint32_t offset, daddr_t *sector, uint32_t *max_size)
1066 struct udf_mnt *udfmp;
1067 struct file_entry *fentry;
1069 struct icb_tag *tag;
1070 uint32_t icblen = 0;
1072 int ad_offset, ad_num = 0;
1075 udfmp = node->udfmp;
1076 fentry = node->fentry;
1077 tag = &fentry->icbtag;
1079 switch (tag->strat_type) {
1084 kprintf("Cannot deal with strategy4096 yet!\n");
1088 kprintf("Unknown strategy type %d\n", tag->strat_type);
1092 switch (tag->flags & 0x7) {
1095 * The allocation descriptor field is filled with short_ad's.
1096 * If the offset is beyond the current extent, look for the
1101 ad_offset = sizeof(struct short_ad) * ad_num;
1102 if (ad_offset > fentry->l_ad) {
1103 kprintf("File offset out of bounds\n");
1106 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset);
1107 icblen = GETICBLEN(short_ad, icb);
1109 } while(offset >= icblen);
1111 lsector = (offset >> udfmp->bshift) +
1112 ((struct short_ad *)(icb))->pos;
1114 *max_size = GETICBLEN(short_ad, icb);
1119 * The allocation descriptor field is filled with long_ad's
1120 * If the offset is beyond the current extent, look for the
1125 ad_offset = sizeof(struct long_ad) * ad_num;
1126 if (ad_offset > fentry->l_ad) {
1127 kprintf("File offset out of bounds\n");
1130 icb = GETICB(long_ad, fentry, fentry->l_ea + ad_offset);
1131 icblen = GETICBLEN(long_ad, icb);
1133 } while(offset >= icblen);
1135 lsector = (offset >> udfmp->bshift) +
1136 ((struct long_ad *)(icb))->loc.lb_num;
1138 *max_size = GETICBLEN(long_ad, icb);
1143 * This type means that the file *data* is stored in the
1144 * allocation descriptor field of the file entry.
1147 *sector = node->hash_id + udfmp->part_start;
1149 return(UDF_INVALID_BMAP);
1151 /* DirectCD does not use extended_ad's */
1153 kprintf("Unsupported allocation descriptor %d\n",
1158 *sector = lsector + udfmp->part_start;
1161 * Check the sparing table. Each entry represents the beginning of
1164 if (udfmp->s_table != NULL) {
1165 for (i = 0; i< udfmp->s_table_entries; i++) {
1166 p_offset = lsector - udfmp->s_table->entries[i].org;
1167 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) {
1168 *sector = udfmp->s_table->entries[i].map +