2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright (c) 2001, 2002 Scott Long <scottl@freebsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 /* Take care of the vnode side of things */
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/namei.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
43 #include <sys/iconv.h>
44 #include <sys/mount.h>
45 #include <sys/vnode.h>
46 #include <sys/dirent.h>
47 #include <sys/queue.h>
48 #include <sys/unistd.h>
49 #include <sys/endian.h>
53 #include <fs/udf/ecma167-udf.h>
54 #include <fs/udf/osta.h>
55 #include <fs/udf/udf.h>
56 #include <fs/udf/udf_mount.h>
58 extern struct iconv_functions *udf_iconv;
60 static vop_access_t udf_access;
61 static vop_getattr_t udf_getattr;
62 static vop_open_t udf_open;
63 static vop_ioctl_t udf_ioctl;
64 static vop_pathconf_t udf_pathconf;
65 static vop_print_t udf_print;
66 static vop_read_t udf_read;
67 static vop_readdir_t udf_readdir;
68 static vop_readlink_t udf_readlink;
69 static vop_setattr_t udf_setattr;
70 static vop_strategy_t udf_strategy;
71 static vop_bmap_t udf_bmap;
72 static vop_cachedlookup_t udf_lookup;
73 static vop_reclaim_t udf_reclaim;
74 static vop_vptofh_t udf_vptofh;
75 static int udf_readatoffset(struct udf_node *node, int *size, off_t offset,
76 struct buf **bp, uint8_t **data);
77 static int udf_bmap_internal(struct udf_node *node, off_t offset,
78 daddr_t *sector, uint32_t *max_size);
80 static struct vop_vector udf_vnodeops = {
81 .vop_default = &default_vnodeops,
83 .vop_access = udf_access,
85 .vop_cachedlookup = udf_lookup,
86 .vop_getattr = udf_getattr,
87 .vop_ioctl = udf_ioctl,
88 .vop_lookup = vfs_cache_lookup,
90 .vop_pathconf = udf_pathconf,
91 .vop_print = udf_print,
93 .vop_readdir = udf_readdir,
94 .vop_readlink = udf_readlink,
95 .vop_reclaim = udf_reclaim,
96 .vop_setattr = udf_setattr,
97 .vop_strategy = udf_strategy,
98 .vop_vptofh = udf_vptofh,
100 VFS_VOP_VECTOR_REGISTER(udf_vnodeops);
102 struct vop_vector udf_fifoops = {
103 .vop_default = &fifo_specops,
104 .vop_access = udf_access,
105 .vop_getattr = udf_getattr,
106 .vop_pathconf = udf_pathconf,
107 .vop_print = udf_print,
108 .vop_reclaim = udf_reclaim,
109 .vop_setattr = udf_setattr,
110 .vop_vptofh = udf_vptofh,
112 VFS_VOP_VECTOR_REGISTER(udf_fifoops);
114 static MALLOC_DEFINE(M_UDFFID, "udf_fid", "UDF FileId structure");
115 static MALLOC_DEFINE(M_UDFDS, "udf_ds", "UDF Dirstream structure");
117 #define UDF_INVALID_BMAP -1
120 udf_allocv(struct mount *mp, struct vnode **vpp, struct thread *td)
125 error = getnewvnode("udf", mp, &udf_vnodeops, &vp);
127 printf("udf_allocv: failed to allocate new vnode\n");
135 /* Convert file entry permission (5 bits per owner/group/user) to a mode_t */
137 udf_permtomode(struct udf_node *node)
143 perm = le32toh(node->fentry->perm);
144 flags = le16toh(node->fentry->icbtag.flags);
146 mode = perm & UDF_FENTRY_PERM_USER_MASK;
147 mode |= ((perm & UDF_FENTRY_PERM_GRP_MASK) >> 2);
148 mode |= ((perm & UDF_FENTRY_PERM_OWNER_MASK) >> 4);
149 mode |= ((flags & UDF_ICB_TAG_FLAGS_STICKY) << 4);
150 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETGID) << 6);
151 mode |= ((flags & UDF_ICB_TAG_FLAGS_SETUID) << 8);
157 udf_access(struct vop_access_args *a)
160 struct udf_node *node;
166 accmode = a->a_accmode;
168 if (accmode & VWRITE) {
169 switch (vp->v_type) {
180 mode = udf_permtomode(node);
182 return (vaccess(vp->v_type, mode, node->fentry->uid, node->fentry->gid,
183 accmode, a->a_cred));
187 udf_open(struct vop_open_args *ap) {
188 struct udf_node *np = VTON(ap->a_vp);
191 fsize = le64toh(np->fentry->inf_len);
192 vnode_create_vobject(ap->a_vp, fsize, ap->a_td);
196 static const int mon_lens[2][12] = {
197 {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334},
198 {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335}
202 udf_isaleapyear(int year)
206 i = (year % 4) ? 0 : 1;
207 i &= (year % 100) ? 1 : 0;
208 i |= (year % 400) ? 0 : 1;
214 * Timezone calculation compliments of Julian Elischer <julian@elischer.org>.
217 udf_timetotimespec(struct timestamp *time, struct timespec *t)
219 int i, lpyear, daysinyear, year, startyear;
221 uint16_t u_tz_offset;
226 * DirectCD seems to like using bogus year values.
227 * Don't trust time->month as it will be used for an array index.
229 year = le16toh(time->year);
230 if (year < 1970 || time->month < 1 || time->month > 12) {
236 /* Calculate the time and day */
237 t->tv_sec = time->second;
238 t->tv_sec += time->minute * 60;
239 t->tv_sec += time->hour * 3600;
240 t->tv_sec += (time->day - 1) * 3600 * 24;
242 /* Calculate the month */
243 lpyear = udf_isaleapyear(year);
244 t->tv_sec += mon_lens[lpyear][time->month - 1] * 3600 * 24;
246 /* Speed up the calculation */
249 t->tv_sec += 1262304000;
251 } else if (year > 1999) {
252 t->tv_sec += 946684800;
254 } else if (year > 1989) {
255 t->tv_sec += 631152000;
257 } else if (year > 1979) {
258 t->tv_sec += 315532800;
262 daysinyear = (year - startyear) * 365;
263 for (i = startyear; i < year; i++)
264 daysinyear += udf_isaleapyear(i);
265 t->tv_sec += daysinyear * 3600 * 24;
267 /* Calculate microseconds */
268 t->tv_nsec = time->centisec * 10000 + time->hund_usec * 100 +
272 * Calculate the time zone. The timezone is 12 bit signed 2's
273 * complement, so we gotta do some extra magic to handle it right.
275 tz.u_tz_offset = le16toh(time->type_tz);
276 tz.u_tz_offset &= 0x0fff;
277 if (tz.u_tz_offset & 0x0800)
278 tz.u_tz_offset |= 0xf000; /* extend the sign to 16 bits */
279 if ((le16toh(time->type_tz) & 0x1000) && (tz.s_tz_offset != -2047))
280 t->tv_sec -= tz.s_tz_offset * 60;
286 udf_getattr(struct vop_getattr_args *a)
289 struct udf_node *node;
291 struct file_entry *fentry;
296 fentry = node->fentry;
298 vap->va_fsid = dev2udev(node->udfmp->im_dev);
299 vap->va_fileid = node->hash_id;
300 vap->va_mode = udf_permtomode(node);
301 vap->va_nlink = le16toh(fentry->link_cnt);
303 * XXX The spec says that -1 is valid for uid/gid and indicates an
304 * invalid uid/gid. How should this be represented?
306 vap->va_uid = (le32toh(fentry->uid) == -1) ? 0 : le32toh(fentry->uid);
307 vap->va_gid = (le32toh(fentry->gid) == -1) ? 0 : le32toh(fentry->gid);
308 udf_timetotimespec(&fentry->atime, &vap->va_atime);
309 udf_timetotimespec(&fentry->mtime, &vap->va_mtime);
310 vap->va_ctime = vap->va_mtime; /* XXX Stored as an Extended Attribute */
311 vap->va_rdev = NODEV;
312 if (vp->v_type & VDIR) {
314 * Directories that are recorded within their ICB will show
315 * as having 0 blocks recorded. Since tradition dictates
316 * that directories consume at least one logical block,
319 if (fentry->logblks_rec != 0) {
321 le64toh(fentry->logblks_rec) * node->udfmp->bsize;
323 vap->va_size = node->udfmp->bsize;
326 vap->va_size = le64toh(fentry->inf_len);
330 vap->va_blocksize = node->udfmp->bsize;
331 vap->va_bytes = le64toh(fentry->inf_len);
332 vap->va_type = vp->v_type;
333 vap->va_filerev = 0; /* XXX */
338 udf_setattr(struct vop_setattr_args *a)
345 if (vap->va_flags != (u_long)VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
346 vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
347 vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL)
349 if (vap->va_size != (u_quad_t)VNOVAL) {
350 switch (vp->v_type) {
370 * File specific ioctls.
373 udf_ioctl(struct vop_ioctl_args *a)
375 printf("%s called\n", __func__);
380 * I'm not sure that this has much value in a read-only filesystem, but
384 udf_pathconf(struct vop_pathconf_args *a)
388 case _PC_FILESIZEBITS:
392 *a->a_retval = 65535;
395 *a->a_retval = NAME_MAX;
397 case _PC_SYMLINK_MAX:
398 *a->a_retval = MAXPATHLEN;
404 if (a->a_vp->v_type == VDIR || a->a_vp->v_type == VFIFO) {
405 *a->a_retval = PIPE_BUF;
410 return (vop_stdpathconf(a));
415 udf_print(struct vop_print_args *ap)
417 struct vnode *vp = ap->a_vp;
418 struct udf_node *node = VTON(vp);
420 printf(" ino %lu, on dev %s", (u_long)node->hash_id,
421 devtoname(node->udfmp->im_dev));
422 if (vp->v_type == VFIFO)
428 #define lblkno(udfmp, loc) ((loc) >> (udfmp)->bshift)
429 #define blkoff(udfmp, loc) ((loc) & (udfmp)->bmask)
430 #define lblktosize(udfmp, blk) ((blk) << (udfmp)->bshift)
433 is_data_in_fentry(const struct udf_node *node)
435 const struct file_entry *fentry = node->fentry;
437 return ((le16toh(fentry->icbtag.flags) & 0x7) == 3);
441 udf_read(struct vop_read_args *ap)
443 struct vnode *vp = ap->a_vp;
444 struct uio *uio = ap->a_uio;
445 struct udf_node *node = VTON(vp);
446 struct udf_mnt *udfmp;
447 struct file_entry *fentry;
450 daddr_t lbn, rablock;
456 if (uio->uio_resid == 0)
458 if (uio->uio_offset < 0)
461 if (is_data_in_fentry(node)) {
462 fentry = node->fentry;
463 data = &fentry->data[le32toh(fentry->l_ea)];
464 fsize = le32toh(fentry->l_ad);
467 diff = fsize - uio->uio_offset;
472 error = uiomove(data + uio->uio_offset, (int)n, uio);
476 fsize = le64toh(node->fentry->inf_len);
479 lbn = lblkno(udfmp, uio->uio_offset);
480 on = blkoff(udfmp, uio->uio_offset);
481 n = min((u_int)(udfmp->bsize - on),
483 diff = fsize - uio->uio_offset;
490 if ((vp->v_mount->mnt_flag & MNT_NOCLUSTERR) == 0) {
491 if (lblktosize(udfmp, rablock) < fsize) {
492 error = cluster_read(vp, fsize, lbn, size,
493 NOCRED, uio->uio_resid,
494 (ap->a_ioflag >> 16), 0, &bp);
496 error = bread(vp, lbn, size, NOCRED, &bp);
499 error = bread(vp, lbn, size, NOCRED, &bp);
505 n = min(n, size - bp->b_resid);
507 error = uiomove(bp->b_data + on, (int)n, uio);
509 } while (error == 0 && uio->uio_resid > 0 && n != 0);
514 * Call the OSTA routines to translate the name from a CS0 dstring to a
515 * 16-bit Unicode String. Hooks need to be placed in here to translate from
516 * Unicode to the encoding that the kernel/user expects. Return the length
517 * of the translated string.
520 udf_transname(char *cs0string, char *destname, int len, struct udf_mnt *udfmp)
522 unicode_t *transname;
526 size_t destleft = MAXNAMLEN;
528 /* Convert 16-bit Unicode to destname */
529 if (udfmp->im_flags & UDFMNT_KICONV && udf_iconv) {
530 /* allocate a buffer big enough to hold an 8->16 bit expansion */
531 unibuf = uma_zalloc(udf_zone_trans, M_WAITOK);
533 if ((unilen = (ssize_t)udf_UncompressUnicodeByte(len, cs0string, unibuf)) == -1) {
534 printf("udf: Unicode translation failed\n");
535 uma_zfree(udf_zone_trans, unibuf);
539 while (unilen > 0 && destleft > 0) {
540 udf_iconv->conv(udfmp->im_d2l, __DECONST(const char **,
541 &unibuf), (size_t *)&unilen, (char **)&destname,
543 /* Unconverted character found */
544 if (unilen > 0 && destleft > 0) {
551 uma_zfree(udf_zone_trans, unip);
553 destlen = MAXNAMLEN - (int)destleft;
555 /* allocate a buffer big enough to hold an 8->16 bit expansion */
556 transname = uma_zalloc(udf_zone_trans, M_WAITOK);
558 if ((unilen = (ssize_t)udf_UncompressUnicode(len, cs0string, transname)) == -1) {
559 printf("udf: Unicode translation failed\n");
560 uma_zfree(udf_zone_trans, transname);
564 for (i = 0; i < unilen ; i++) {
565 if (transname[i] & 0xff00) {
566 destname[i] = '.'; /* Fudge the 16bit chars */
568 destname[i] = transname[i] & 0xff;
571 uma_zfree(udf_zone_trans, transname);
572 destname[unilen] = 0;
573 destlen = (int)unilen;
580 * Compare a CS0 dstring with a name passed in from the VFS layer. Return
581 * 0 on a successful match, nonzero otherwise. Unicode work may need to be done
585 udf_cmpname(char *cs0string, char *cmpname, int cs0len, int cmplen, struct udf_mnt *udfmp)
590 /* This is overkill, but not worth creating a new zone */
591 transname = uma_zalloc(udf_zone_trans, M_WAITOK);
593 cs0len = udf_transname(cs0string, transname, cs0len, udfmp);
595 /* Easy check. If they aren't the same length, they aren't equal */
596 if ((cs0len == 0) || (cs0len != cmplen))
599 error = bcmp(transname, cmpname, cmplen);
601 uma_zfree(udf_zone_trans, transname);
606 struct dirent *dirent;
614 udf_uiodir(struct udf_uiodir *uiodir, int de_size, struct uio *uio, long cookie)
616 if (uiodir->cookies != NULL) {
617 if (++uiodir->acookies > uiodir->ncookies) {
621 *uiodir->cookies++ = cookie;
624 if (uio->uio_resid < de_size) {
629 return (uiomove(uiodir->dirent, de_size, uio));
632 static struct udf_dirstream *
633 udf_opendir(struct udf_node *node, int offset, int fsize, struct udf_mnt *udfmp)
635 struct udf_dirstream *ds;
637 ds = uma_zalloc(udf_zone_ds, M_WAITOK | M_ZERO);
647 static struct fileid_desc *
648 udf_getfid(struct udf_dirstream *ds)
650 struct fileid_desc *fid;
651 int error, frag_size = 0, total_fid_size;
653 /* End of directory? */
654 if (ds->offset + ds->off >= ds->fsize) {
659 /* Grab the first extent of the directory */
662 error = udf_readatoffset(ds->node, &ds->size, ds->offset,
673 * Clean up from a previous fragmented FID.
674 * XXX Is this the right place for this?
676 if (ds->fid_fragment && ds->buf != NULL) {
677 ds->fid_fragment = 0;
678 free(ds->buf, M_UDFFID);
681 fid = (struct fileid_desc*)&ds->data[ds->off];
684 * Check to see if the fid is fragmented. The first test
685 * ensures that we don't wander off the end of the buffer
686 * looking for the l_iu and l_fi fields.
688 if (ds->off + UDF_FID_SIZE > ds->size ||
689 ds->off + le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE > ds->size){
690 /* Copy what we have of the fid into a buffer */
691 frag_size = ds->size - ds->off;
692 if (frag_size >= ds->udfmp->bsize) {
693 printf("udf: invalid FID fragment\n");
699 * File ID descriptors can only be at most one
700 * logical sector in size.
702 ds->buf = malloc(ds->udfmp->bsize, M_UDFFID,
704 bcopy(fid, ds->buf, frag_size);
706 /* Reduce all of the casting magic */
707 fid = (struct fileid_desc*)ds->buf;
712 /* Fetch the next allocation */
713 ds->offset += ds->size;
715 error = udf_readatoffset(ds->node, &ds->size, ds->offset,
723 * If the fragment was so small that we didn't get
724 * the l_iu and l_fi fields, copy those in.
726 if (frag_size < UDF_FID_SIZE)
727 bcopy(ds->data, &ds->buf[frag_size],
728 UDF_FID_SIZE - frag_size);
731 * Now that we have enough of the fid to work with,
732 * copy in the rest of the fid from the new
735 total_fid_size = UDF_FID_SIZE + le16toh(fid->l_iu) + fid->l_fi;
736 if (total_fid_size > ds->udfmp->bsize) {
737 printf("udf: invalid FID\n");
741 bcopy(ds->data, &ds->buf[frag_size],
742 total_fid_size - frag_size);
744 ds->fid_fragment = 1;
746 total_fid_size = le16toh(fid->l_iu) + fid->l_fi + UDF_FID_SIZE;
750 * Update the offset. Align on a 4 byte boundary because the
753 ds->this_off = ds->offset + ds->off;
754 if (!ds->fid_fragment) {
755 ds->off += (total_fid_size + 3) & ~0x03;
757 ds->off = (total_fid_size - frag_size + 3) & ~0x03;
764 udf_closedir(struct udf_dirstream *ds)
770 if (ds->fid_fragment && ds->buf != NULL)
771 free(ds->buf, M_UDFFID);
773 uma_zfree(udf_zone_ds, ds);
777 udf_readdir(struct vop_readdir_args *a)
782 struct udf_node *node;
783 struct udf_mnt *udfmp;
784 struct fileid_desc *fid;
785 struct udf_uiodir uiodir;
786 struct udf_dirstream *ds;
787 uint64_t *cookies = NULL;
797 if (a->a_ncookies != NULL) {
799 * Guess how many entries are needed. If we run out, this
800 * function will be called again and thing will pick up were
803 ncookies = uio->uio_resid / 8;
804 cookies = malloc(sizeof(*cookies) * ncookies, M_TEMP, M_WAITOK);
807 uiodir.ncookies = ncookies;
808 uiodir.cookies = cookies;
811 uiodir.cookies = NULL;
815 * Iterate through the file id descriptors. Give the parent dir
816 * entry special attention.
818 ds = udf_opendir(node, uio->uio_offset, le64toh(node->fentry->inf_len),
821 while ((fid = udf_getfid(ds)) != NULL) {
822 /* XXX Should we return an error on a bad fid? */
823 if (udf_checktag(&fid->tag, TAGID_FID)) {
824 printf("Invalid FID tag\n");
825 hexdump(fid, UDF_FID_SIZE, NULL, 0);
830 /* Is this a deleted file? */
831 if (fid->file_char & UDF_FILE_CHAR_DEL)
834 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
835 /* Do up the '.' and '..' entries. Dummy values are
836 * used for the cookies since the offset here is
837 * usually zero, and NFS doesn't like that value
839 dir.d_fileno = node->hash_id;
843 dir.d_reclen = GENERIC_DIRSIZ(&dir);
845 dirent_terminate(&dir);
846 uiodir.dirent = &dir;
847 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 1);
851 dir.d_fileno = udf_getid(&fid->icb);
856 dir.d_reclen = GENERIC_DIRSIZ(&dir);
858 dirent_terminate(&dir);
859 uiodir.dirent = &dir;
860 error = udf_uiodir(&uiodir, dir.d_reclen, uio, 2);
862 dir.d_namlen = udf_transname(&fid->data[fid->l_iu],
863 &dir.d_name[0], fid->l_fi, udfmp);
864 dir.d_fileno = udf_getid(&fid->icb);
865 dir.d_type = (fid->file_char & UDF_FILE_CHAR_DIR) ?
867 dir.d_reclen = GENERIC_DIRSIZ(&dir);
868 dir.d_off = ds->this_off;
869 dirent_terminate(&dir);
870 uiodir.dirent = &dir;
871 error = udf_uiodir(&uiodir, dir.d_reclen, uio,
876 uio->uio_offset = ds->offset + ds->off;
879 /* tell the calling layer whether we need to be called again */
880 *a->a_eofflag = uiodir.eofflag;
889 if (a->a_ncookies != NULL) {
891 free(cookies, M_TEMP);
893 *a->a_ncookies = uiodir.acookies;
894 *a->a_cookies = cookies;
902 udf_readlink(struct vop_readlink_args *ap)
904 struct path_component *pc, *end;
908 struct udf_node *node;
911 int error, len, root;
914 * A symbolic link in UDF is a list of variable-length path
915 * component structures. We build a pathname in the caller's
916 * uio by traversing this list.
920 len = le64toh(node->fentry->inf_len);
921 buf = malloc(len, M_DEVBUF, M_WAITOK);
922 iov[0].iov_len = len;
923 iov[0].iov_base = buf;
927 uio.uio_resid = iov[0].iov_len;
928 uio.uio_segflg = UIO_SYSSPACE;
929 uio.uio_rw = UIO_READ;
930 uio.uio_td = curthread;
931 error = VOP_READ(vp, &uio, 0, ap->a_cred);
936 end = (void *)((char *)buf + len);
941 /* Only allow this at the beginning of a path. */
942 if ((void *)pc != buf) {
954 case UDF_PATH_DOTDOT:
959 if (pc->length == 0) {
964 * XXX: We only support CS8 which appears to map
967 switch (pc->identifier[0]) {
969 cp = pc->identifier + 1;
970 len = pc->length - 1;
983 * If this is not the first component, insert a path
987 /* If we started with root we already have a "/". */
991 if (ap->a_uio->uio_resid < 1) {
992 error = ENAMETOOLONG;
995 error = uiomove("/", 1, ap->a_uio);
1001 /* Append string at 'cp' of length 'len' to our path. */
1002 if (len > ap->a_uio->uio_resid) {
1003 error = ENAMETOOLONG;
1006 error = uiomove(cp, len, ap->a_uio);
1010 /* Advance to next component. */
1011 pc = (void *)((char *)pc + 4 + pc->length);
1014 free(buf, M_DEVBUF);
1019 udf_strategy(struct vop_strategy_args *a)
1023 struct udf_node *node;
1034 if (bp->b_blkno == bp->b_lblkno) {
1035 offset = lblktosize(node->udfmp, bp->b_lblkno);
1036 error = udf_bmap_internal(node, offset, §or, &maxsize);
1043 /* bmap gives sector numbers, bio works with device blocks */
1044 bp->b_blkno = sector << (node->udfmp->bshift - DEV_BSHIFT);
1046 bo = node->udfmp->im_bo;
1047 bp->b_iooffset = dbtob(bp->b_blkno);
1048 BO_STRATEGY(bo, bp);
1053 udf_bmap(struct vop_bmap_args *a)
1055 struct udf_node *node;
1061 node = VTON(a->a_vp);
1063 if (a->a_bop != NULL)
1064 *a->a_bop = &node->udfmp->im_devvp->v_bufobj;
1065 if (a->a_bnp == NULL)
1071 * UDF_INVALID_BMAP means data embedded into fentry, this is an internal
1072 * error that should not be propagated to calling code.
1073 * Most obvious mapping for this error is EOPNOTSUPP as we can not truly
1074 * translate block numbers in this case.
1075 * Incidentally, this return code will make vnode pager to use VOP_READ
1076 * to get data for mmap-ed pages and udf_read knows how to do the right
1077 * thing for this kind of files.
1079 error = udf_bmap_internal(node, a->a_bn << node->udfmp->bshift,
1080 &lsector, &max_size);
1081 if (error == UDF_INVALID_BMAP)
1082 return (EOPNOTSUPP);
1086 /* Translate logical to physical sector number */
1087 *a->a_bnp = lsector << (node->udfmp->bshift - DEV_BSHIFT);
1090 * Determine maximum number of readahead blocks following the
1094 nblk = (max_size >> node->udfmp->bshift) - 1;
1097 else if (nblk >= (MAXBSIZE >> node->udfmp->bshift))
1098 *a->a_runp = (MAXBSIZE >> node->udfmp->bshift) - 1;
1111 * The all powerful VOP_LOOKUP().
1114 udf_lookup(struct vop_cachedlookup_args *a)
1117 struct vnode *tdp = NULL;
1118 struct vnode **vpp = a->a_vpp;
1119 struct udf_node *node;
1120 struct udf_mnt *udfmp;
1121 struct fileid_desc *fid = NULL;
1122 struct udf_dirstream *ds;
1128 int offset, error = 0;
1129 int fsize, lkflags, ltype, numdirpasses;
1133 udfmp = node->udfmp;
1134 nameiop = a->a_cnp->cn_nameiop;
1135 flags = a->a_cnp->cn_flags;
1136 lkflags = a->a_cnp->cn_lkflags;
1137 nameptr = a->a_cnp->cn_nameptr;
1138 namelen = a->a_cnp->cn_namelen;
1139 fsize = le64toh(node->fentry->inf_len);
1142 * If this is a LOOKUP and we've already partially searched through
1143 * the directory, pick up where we left off and flag that the
1144 * directory may need to be searched twice. For a full description,
1145 * see /sys/fs/cd9660/cd9660_lookup.c:cd9660_lookup()
1147 if (nameiop != LOOKUP || node->diroff == 0 || node->diroff > fsize) {
1151 offset = node->diroff;
1153 nchstats.ncs_2passes++;
1157 ds = udf_opendir(node, offset, fsize, udfmp);
1159 while ((fid = udf_getfid(ds)) != NULL) {
1160 /* XXX Should we return an error on a bad fid? */
1161 if (udf_checktag(&fid->tag, TAGID_FID)) {
1162 printf("udf_lookup: Invalid tag\n");
1167 /* Is this a deleted file? */
1168 if (fid->file_char & UDF_FILE_CHAR_DEL)
1171 if ((fid->l_fi == 0) && (fid->file_char & UDF_FILE_CHAR_PAR)) {
1172 if (flags & ISDOTDOT) {
1173 id = udf_getid(&fid->icb);
1177 if (!(udf_cmpname(&fid->data[fid->l_iu],
1178 nameptr, fid->l_fi, namelen, udfmp))) {
1179 id = udf_getid(&fid->icb);
1188 /* XXX Bail out here? */
1194 /* Did we have a match? */
1197 * Remember where this entry was if it's the final
1200 if ((flags & ISLASTCN) && nameiop == LOOKUP)
1201 node->diroff = ds->offset + ds->off;
1202 if (numdirpasses == 2)
1203 nchstats.ncs_pass2++;
1206 if (flags & ISDOTDOT) {
1207 error = vn_vget_ino(dvp, id, lkflags, &tdp);
1208 } else if (node->hash_id == id) {
1209 VREF(dvp); /* we want ourself, ie "." */
1211 * When we lookup "." we still can be asked to lock it
1214 ltype = lkflags & LK_TYPE_MASK;
1215 if (ltype != VOP_ISLOCKED(dvp)) {
1216 if (ltype == LK_EXCLUSIVE)
1217 vn_lock(dvp, LK_UPGRADE | LK_RETRY);
1218 else /* if (ltype == LK_SHARED) */
1219 vn_lock(dvp, LK_DOWNGRADE | LK_RETRY);
1223 error = udf_vget(udfmp->im_mountp, id, lkflags, &tdp);
1226 /* Put this entry in the cache */
1227 if (flags & MAKEENTRY)
1228 cache_enter(dvp, *vpp, a->a_cnp);
1231 /* Name wasn't found on this pass. Do another pass? */
1232 if (numdirpasses == 2) {
1240 /* Enter name into cache as non-existant */
1241 if (flags & MAKEENTRY)
1242 cache_enter(dvp, *vpp, a->a_cnp);
1244 if ((flags & ISLASTCN) &&
1245 (nameiop == CREATE || nameiop == RENAME)) {
1256 udf_reclaim(struct vop_reclaim_args *a)
1259 struct udf_node *unode;
1264 if (unode != NULL) {
1265 vfs_hash_remove(vp);
1267 if (unode->fentry != NULL)
1268 free(unode->fentry, M_UDFFENTRY);
1269 uma_zfree(udf_zone_node, unode);
1277 udf_vptofh(struct vop_vptofh_args *a)
1279 struct udf_node *node;
1282 node = VTON(a->a_vp);
1283 ifhp = (struct ifid *)a->a_fhp;
1284 ifhp->ifid_len = sizeof(struct ifid);
1285 ifhp->ifid_ino = node->hash_id;
1291 * Read the block and then set the data pointer to correspond with the
1292 * offset passed in. Only read in at most 'size' bytes, and then set 'size'
1293 * to the number of bytes pointed to. If 'size' is zero, try to read in a
1296 * Note that *bp may be assigned error or not.
1300 udf_readatoffset(struct udf_node *node, int *size, off_t offset,
1301 struct buf **bp, uint8_t **data)
1303 struct udf_mnt *udfmp = node->udfmp;
1304 struct vnode *vp = node->i_vnode;
1305 struct file_entry *fentry;
1314 * This call is made *not* only to detect UDF_INVALID_BMAP case,
1315 * max_size is used as an ad-hoc read-ahead hint for "normal" case.
1317 error = udf_bmap_internal(node, offset, §or, &max_size);
1318 if (error == UDF_INVALID_BMAP) {
1320 * This error means that the file *data* is stored in the
1321 * allocation descriptor field of the file entry.
1323 fentry = node->fentry;
1324 *data = &fentry->data[le32toh(fentry->l_ea)];
1325 *size = le32toh(fentry->l_ad);
1326 if (offset >= *size)
1333 } else if (error != 0) {
1337 /* Adjust the size so that it is within range */
1338 if (*size == 0 || *size > max_size)
1342 * Because we will read starting at block boundary, we need to adjust
1343 * how much we need to read so that all promised data is in.
1344 * Also, we can't promise to read more than MAXBSIZE bytes starting
1345 * from block boundary, so adjust what we promise too.
1347 off = blkoff(udfmp, offset);
1348 *size = min(*size, MAXBSIZE - off);
1349 adj_size = (*size + off + udfmp->bmask) & ~udfmp->bmask;
1351 if ((error = bread(vp, lblkno(udfmp, offset), adj_size, NOCRED, bp))) {
1352 printf("warning: udf_readlblks returned error %d\n", error);
1353 /* note: *bp may be non-NULL */
1358 *data = (uint8_t *)&bp1->b_data[offset & udfmp->bmask];
1363 * Translate a file offset into a logical block and then into a physical
1365 * max_size - maximum number of bytes that can be read starting from given
1366 * offset, rather than beginning of calculated sector number
1369 udf_bmap_internal(struct udf_node *node, off_t offset, daddr_t *sector,
1372 struct udf_mnt *udfmp;
1373 struct file_entry *fentry;
1375 struct icb_tag *tag;
1376 uint32_t icblen = 0;
1378 int ad_offset, ad_num = 0;
1381 udfmp = node->udfmp;
1382 fentry = node->fentry;
1383 tag = &fentry->icbtag;
1385 switch (le16toh(tag->strat_type)) {
1390 printf("Cannot deal with strategy4096 yet!\n");
1394 printf("Unknown strategy type %d\n", tag->strat_type);
1398 switch (le16toh(tag->flags) & 0x7) {
1401 * The allocation descriptor field is filled with short_ad's.
1402 * If the offset is beyond the current extent, look for the
1407 ad_offset = sizeof(struct short_ad) * ad_num;
1408 if (ad_offset > le32toh(fentry->l_ad)) {
1409 printf("File offset out of bounds\n");
1412 icb = GETICB(short_ad, fentry,
1413 le32toh(fentry->l_ea) + ad_offset);
1414 icblen = GETICBLEN(short_ad, icb);
1416 } while(offset >= icblen);
1418 lsector = (offset >> udfmp->bshift) +
1419 le32toh(((struct short_ad *)(icb))->pos);
1421 *max_size = icblen - offset;
1426 * The allocation descriptor field is filled with long_ad's
1427 * If the offset is beyond the current extent, look for the
1432 ad_offset = sizeof(struct long_ad) * ad_num;
1433 if (ad_offset > le32toh(fentry->l_ad)) {
1434 printf("File offset out of bounds\n");
1437 icb = GETICB(long_ad, fentry,
1438 le32toh(fentry->l_ea) + ad_offset);
1439 icblen = GETICBLEN(long_ad, icb);
1441 } while(offset >= icblen);
1443 lsector = (offset >> udfmp->bshift) +
1444 le32toh(((struct long_ad *)(icb))->loc.lb_num);
1446 *max_size = icblen - offset;
1451 * This type means that the file *data* is stored in the
1452 * allocation descriptor field of the file entry.
1455 *sector = node->hash_id + udfmp->part_start;
1457 return (UDF_INVALID_BMAP);
1459 /* DirectCD does not use extended_ad's */
1461 printf("Unsupported allocation descriptor %d\n",
1466 *sector = lsector + udfmp->part_start;
1469 * Check the sparing table. Each entry represents the beginning of
1472 if (udfmp->s_table != NULL) {
1473 for (i = 0; i< udfmp->s_table_entries; i++) {
1475 lsector - le32toh(udfmp->s_table->entries[i].org);
1476 if ((p_offset < udfmp->p_sectors) && (p_offset >= 0)) {
1478 le32toh(udfmp->s_table->entries[i].map) +