Bug Summary

File:ntfs/ntfs_subr.c
Warning:line 202, column 13
Access to field 'reclen' results in a dereference of a null pointer (loaded from variable 'aalp')

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ntfs_subr.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -D CONFIG_DRM_AMD_DC_DCN3_0 -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /usr/obj/sys/arch/amd64/compile/GENERIC.MP/scan-build/2022-01-12-131800-47421-1 -x c /usr/src/sys/ntfs/ntfs_subr.c
1/* $OpenBSD: ntfs_subr.c,v 1.52 2022/01/11 03:13:59 jsg Exp $ */
2/* $NetBSD: ntfs_subr.c,v 1.4 2003/04/10 21:37:32 jdolecek Exp $ */
3
4/*-
5 * Copyright (c) 1998, 1999 Semen Ustimenko (semenu@FreeBSD.org)
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Id: ntfs_subr.c,v 1.4 1999/05/12 09:43:01 semenu Exp
30 */
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/namei.h>
35#include <sys/kernel.h>
36#include <sys/vnode.h>
37#include <sys/lock.h>
38#include <sys/mount.h>
39#include <sys/buf.h>
40#include <sys/malloc.h>
41#include <sys/rwlock.h>
42#include <sys/specdev.h>
43
44/* #define NTFS_DEBUG 1 */
45#include <ntfs/ntfs.h>
46#include <ntfs/ntfsmount.h>
47#include <ntfs/ntfs_inode.h>
48#include <ntfs/ntfs_vfsops.h>
49#include <ntfs/ntfs_subr.h>
50#include <ntfs/ntfs_compr.h>
51#include <ntfs/ntfs_ihash.h>
52
53#if defined(NTFS_DEBUG)
54int ntfs_debug = NTFS_DEBUG;
55#endif
56
57/* Local struct used in ntfs_ntlookupfile() */
58struct ntfs_lookup_ctx {
59 u_int32_t aoff;
60 u_int32_t rdsize;
61 cn_t cn;
62 struct ntfs_lookup_ctx *prev;
63};
64
65int ntfs_ntlookupattr(struct ntfsmount *, const char *, int, int *, char **);
66int ntfs_findvattr(struct ntfsmount *, struct ntnode *, struct ntvattr **, struct ntvattr **, u_int32_t, const char *, size_t, cn_t);
67int ntfs_uastricmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
68int ntfs_uastrcmp(struct ntfsmount *, const wchar *, size_t, const char *, size_t);
69
70/* table for mapping Unicode chars into uppercase; it's filled upon first
71 * ntfs mount, freed upon last ntfs umount */
72static wchar *ntfs_toupper_tab;
73#define NTFS_U28(ch)((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF) ((((ch) & 0xE0) == 0) ? '_' : (ch) & 0xFF)
74#define NTFS_TOUPPER(ch)(ntfs_toupper_tab[(unsigned char)(ch)]) (ntfs_toupper_tab[(unsigned char)(ch)])
75struct rwlock ntfs_toupper_lock = RWLOCK_INITIALIZER("ntfs_toupper"){ 0, "ntfs_toupper" };
76static signed int ntfs_toupper_usecount;
77
78/* support macro for ntfs_ntvattrget() */
79#define NTFS_AALPCMP(aalp,type,name,namelen)( (aalp->al_type == type) && (aalp->al_namelen ==
namelen) && !ntfs_uastrcmp(ntmp, aalp->al_name,aalp
->al_namelen,name,namelen) ) ( \
80 (aalp->al_type == type) && (aalp->al_namelen == namelen) && \
81 !ntfs_uastrcmp(ntmp, aalp->al_name,aalp->al_namelen,name,namelen) )
82
83/*
84 *
85 */
86int
87ntfs_ntvattrrele(struct ntvattr *vap)
88{
89 DPRINTF("ntfs_ntvattrrele: ino: %u, type: 0x%x\n",
90 vap->va_ip->i_number, vap->va_type);
91
92 ntfs_ntrele(vap->va_ip);
93
94 return (0);
95}
96
97/*
98 * find the attribute in the ntnode
99 */
100int
101ntfs_findvattr(struct ntfsmount *ntmp, struct ntnode *ip,
102 struct ntvattr **lvapp, struct ntvattr **vapp, u_int32_t type,
103 const char *name, size_t namelen, cn_t vcn)
104{
105 int error;
106 struct ntvattr *vap;
107
108 if((ip->i_flag & IN_LOADED0x8000) == 0) {
109 DPRINTF("ntfs_findvattr: node not loaded, ino: %u\n",
110 ip->i_number);
111 error = ntfs_loadntnode(ntmp,ip);
112 if (error) {
113 printf("ntfs_findvattr: FAILED TO LOAD INO: %d\n",
114 ip->i_number);
115 return (error);
116 }
117 } else {
118 /* Update LRU loaded list. */
119 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded)do { if (((ip)->i_loaded.tqe_next) != ((void *)0)) (ip)->
i_loaded.tqe_next->i_loaded.tqe_prev = (ip)->i_loaded.tqe_prev
; else (&ntmp->ntm_ntnodeq)->tqh_last = (ip)->i_loaded
.tqe_prev; *(ip)->i_loaded.tqe_prev = (ip)->i_loaded.tqe_next
; ((ip)->i_loaded.tqe_prev) = ((void *)-1); ((ip)->i_loaded
.tqe_next) = ((void *)-1); } while (0);
120 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded)do { if (((ip)->i_loaded.tqe_next = (&ntmp->ntm_ntnodeq
)->tqh_first) != ((void *)0)) (&ntmp->ntm_ntnodeq)->
tqh_first->i_loaded.tqe_prev = &(ip)->i_loaded.tqe_next
; else (&ntmp->ntm_ntnodeq)->tqh_last = &(ip)->
i_loaded.tqe_next; (&ntmp->ntm_ntnodeq)->tqh_first =
(ip); (ip)->i_loaded.tqe_prev = &(&ntmp->ntm_ntnodeq
)->tqh_first; } while (0);
121 }
122
123 *lvapp = NULL((void *)0);
124 *vapp = NULL((void *)0);
125 LIST_FOREACH(vap, &ip->i_valist, va_list)for((vap) = ((&ip->i_valist)->lh_first); (vap)!= ((
void *)0); (vap) = ((vap)->va_list.le_next)) {
126 DDPRINTF("ntfs_findvattr: type: 0x%x, vcn: %llu - %llu\n",
127 vap->va_type, vap->va_vcnstart, vap->va_vcnend);
128 if ((vap->va_type == type) &&
129 (vap->va_vcnstart <= vcn) && (vap->va_vcnend >= vcn) &&
130 (vap->va_namelen == namelen) &&
131 (strncmp(name, vap->va_name, namelen) == 0)) {
132 *vapp = vap;
133 ntfs_ntref(vap->va_ip);
134 return (0);
135 }
136 if (vap->va_type == NTFS_A_ATTRLIST0x20)
137 *lvapp = vap;
138 }
139
140 return (-1);
141}
142
143/*
144 * Search attribute specified in ntnode (load ntnode if necessary).
145 * If not found but ATTR_A_ATTRLIST present, read it in and search through.
146 * VOP_VGET node needed, and lookup through its ntnode (load if necessary).
147 *
148 * ntnode should be locked
149 */
150int
151ntfs_ntvattrget(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t type,
152 const char *name, cn_t vcn, struct ntvattr **vapp)
153{
154 struct ntvattr *lvap = NULL((void *)0);
155 struct attr_attrlist *aalp;
156 struct attr_attrlist *nextaalp;
157 struct vnode *newvp;
158 struct ntnode *newip;
159 caddr_t alpool;
160 size_t namelen, len;
161 int error;
162
163 *vapp = NULL((void *)0);
164
165 if (name
2.1
'name' is non-null
) {
3
←
Taking true branch
→
166 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, name: %s, "
167 "vcn: %llu\n", ip->i_number, type, name, vcn);
168 namelen = strlen(name);
169 } else {
170 DPRINTF("ntfs_ntvattrget: ino: %u, type: 0x%x, vcn: %llu\n",
171 ip->i_number, type, vcn);
172 name = "";
173 namelen = 0;
174 }
175
176 error = ntfs_findvattr(ntmp, ip, &lvap, vapp, type, name, namelen, vcn);
177 if (error >= 0)
4
←
Assuming 'error' is < 0
→
5
←
Taking false branch
→
178 return (error);
179
180 if (!lvap) {
6
←
Assuming 'lvap' is non-null
→
7
←
Taking false branch
→
181 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, "
182 "type: 0x%x, name: %s, vcn: %llu\n", ip->i_number, type,
183 name, vcn);
184 return (ENOENT2);
185 }
186 /* Scan $ATTRIBUTE_LIST for requested attribute */
187 len = lvap->va_datalen;
188 alpool = malloc(len, M_TEMP127, M_WAITOK0x0001);
189 error = ntfs_readntvattr_plain(ntmp, ip, lvap, 0, len, alpool, &len,
190 NULL((void *)0));
191 if (error)
8
←
Assuming 'error' is 0
→
9
←
Taking false branch
→
192 goto out;
193
194 aalp = (struct attr_attrlist *) alpool;
195 nextaalp = NULL((void *)0);
196
197 for(; len > 0; aalp = nextaalp) {
10
←
Assuming 'len' is > 0
→
11
←
Loop condition is true. Entering loop body
→
17
←
Null pointer value stored to 'aalp'
→
18
←
Assuming 'len' is > 0
→
19
←
Loop condition is true. Entering loop body
→
198 DPRINTF("ntfs_ntvattrget: attrlist: ino: %u, attr: 0x%x, "
199 "vcn: %llu\n", aalp->al_inumber, aalp->al_type,
200 aalp->al_vcnstart);
201
202 if (len > aalp->reclen) {
12
←
Assuming 'len' is <= field 'reclen'
→
13
←
Taking false branch
→
20
←
Access to field 'reclen' results in a dereference of a null pointer (loaded from variable 'aalp')
203 nextaalp = NTFS_NEXTREC(aalp, struct attr_attrlist *)((struct attr_attrlist *)(((caddr_t) aalp) + (aalp)->reclen
));
204 } else {
205 nextaalp = NULL((void *)0);
14
←
Null pointer value stored to 'nextaalp'
→
206 }
207 len -= aalp->reclen;
208
209 if (!NTFS_AALPCMP(aalp, type, name, namelen)( (aalp->al_type == type) && (aalp->al_namelen ==
namelen) && !ntfs_uastrcmp(ntmp, aalp->al_name,aalp
->al_namelen,name,namelen) ) ||
15
←
Assuming 'type' is not equal to field 'al_type'
→
210 (nextaalp && (nextaalp->al_vcnstart <= vcn) &&
211 NTFS_AALPCMP(nextaalp, type, name, namelen)( (nextaalp->al_type == type) && (nextaalp->al_namelen
== namelen) && !ntfs_uastrcmp(ntmp, nextaalp->al_name
,nextaalp->al_namelen,name,namelen) )))
212 continue;
16
←
 Execution continues on line 197
→
213
214 DPRINTF("ntfs_ntvattrget: attribute in ino: %u\n",
215 aalp->al_inumber);
216
217 /* this is not a main record, so we can't use just plain
218 vget() */
219 error = ntfs_vgetex(ntmp->ntm_mountp, aalp->al_inumber,
220 NTFS_A_DATA0x80, NULL((void *)0), LK_EXCLUSIVE0x0001UL,
221 VG_EXT0x0004, &newvp);
222 if (error) {
223 printf("ntfs_ntvattrget: CAN'T VGET INO: %d\n",
224 aalp->al_inumber);
225 goto out;
226 }
227 newip = VTONT(newvp)((((struct fnode *)((newvp)->v_data)))->f_ip);
228 /* XXX have to lock ntnode */
229 error = ntfs_findvattr(ntmp, newip, &lvap, vapp,
230 type, name, namelen, vcn);
231 vput(newvp);
232 if (error == 0)
233 goto out;
234 printf("ntfs_ntvattrget: ATTRLIST ERROR.\n");
235 break;
236 }
237 error = ENOENT2;
238
239 DPRINTF("ntfs_ntvattrget: UNEXISTED ATTRIBUTE: ino: %u, type: 0x%x, "
240 "name: %.*s, vcn: %llu\n", ip->i_number, type,
241 (unsigned int)namelen, name, vcn);
242out:
243 free(alpool, M_TEMP127, 0);
244 return (error);
245}
246
247/*
248 * Read ntnode from disk, make ntvattr list.
249 *
250 * ntnode should be locked
251 */
252int
253ntfs_loadntnode(struct ntfsmount *ntmp, struct ntnode *ip)
254{
255 struct ntnode *oip;
256 struct ntvattr *vap;
257 struct filerec *mfrp;
258 struct attr *ap;
259 daddr_t bn;
260 int error,off;
261
262 DPRINTF("ntfs_loadntnode: loading ino: %u\n", ip->i_number);
263
264 KASSERT((ip->i_flag & IN_LOADED) == 0)(((ip->i_flag & 0x8000) == 0) ? (void)0 : __assert("diagnostic "
, "/usr/src/sys/ntfs/ntfs_subr.c", 264, "(ip->i_flag & IN_LOADED) == 0"
));
265
266 if (ntmp->ntm_ntnodes >= LOADED_NTNODE_HI16) {
267 oip = TAILQ_LAST(&ntmp->ntm_ntnodeq, ntnodeq)(*(((struct ntnodeq *)((&ntmp->ntm_ntnodeq)->tqh_last
))->tqh_last));
268 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, oip, i_loaded)do { if (((oip)->i_loaded.tqe_next) != ((void *)0)) (oip)->
i_loaded.tqe_next->i_loaded.tqe_prev = (oip)->i_loaded.
tqe_prev; else (&ntmp->ntm_ntnodeq)->tqh_last = (oip
)->i_loaded.tqe_prev; *(oip)->i_loaded.tqe_prev = (oip)
->i_loaded.tqe_next; ((oip)->i_loaded.tqe_prev) = ((void
*)-1); ((oip)->i_loaded.tqe_next) = ((void *)-1); } while
(0);
269 ntmp->ntm_ntnodes--;
270
271 DPRINTF("ntfs_loadntnode: unloading ino: %u\n", oip->i_number);
272
273 KASSERT((oip->i_flag & IN_LOADED))(((oip->i_flag & 0x8000)) ? (void)0 : __assert("diagnostic "
, "/usr/src/sys/ntfs/ntfs_subr.c", 273, "(oip->i_flag & IN_LOADED)"
));
274 oip->i_flag &= ~IN_LOADED0x8000;
275 while ((vap = LIST_FIRST(&oip->i_valist)((&oip->i_valist)->lh_first)) != NULL((void *)0)) {
276 LIST_REMOVE(vap, va_list)do { if ((vap)->va_list.le_next != ((void *)0)) (vap)->
va_list.le_next->va_list.le_prev = (vap)->va_list.le_prev
; *(vap)->va_list.le_prev = (vap)->va_list.le_next; ((vap
)->va_list.le_prev) = ((void *)-1); ((vap)->va_list.le_next
) = ((void *)-1); } while (0);
277 ntfs_freentvattr(vap);
278 }
279 }
280
281 mfrp = malloc(ntfs_bntob(ntmp->ntm_bpmftrec)(int32_t)((ntmp->ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps
), M_TEMP127, M_WAITOK0x0001);
282
283 if (ip->i_number < NTFS_SYSNODESNUM0x0B) {
284 struct buf *bp;
285
286 DPRINTF("ntfs_loadntnode: read system node\n");
287
288 bn = ntfs_cntobn(ntmp->ntm_mftcn)(daddr_t)((ntmp->ntm_bootfile.bf_mftcn) * (ntmp->ntm_bootfile
.bf_spc)) +
289 ntmp->ntm_bpmftrec * ip->i_number;
290
291 error = bread(ntmp->ntm_devvp, bn,
292 ntfs_bntob(ntmp->ntm_bpmftrec)(int32_t)((ntmp->ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps
), &bp);
293 if (error) {
294 printf("ntfs_loadntnode: BREAD FAILED\n");
295 brelse(bp);
296 goto out;
297 }
298 memcpy(mfrp, bp->b_data, ntfs_bntob(ntmp->ntm_bpmftrec))__builtin_memcpy((mfrp), (bp->b_data), ((int32_t)((ntmp->
ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps)));
299 brelse(bp);
300 } else {
301 struct vnode *vp;
302
303 vp = ntmp->ntm_sysvn[NTFS_MFTINO0];
304 error = ntfs_readattr(ntmp, VTONT(vp)((((struct fnode *)((vp)->v_data)))->f_ip), NTFS_A_DATA0x80, NULL((void *)0),
305 ip->i_number * ntfs_bntob(ntmp->ntm_bpmftrec)(int32_t)((ntmp->ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps
),
306 ntfs_bntob(ntmp->ntm_bpmftrec)(int32_t)((ntmp->ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps
), mfrp, NULL((void *)0));
307 if (error) {
308 printf("ntfs_loadntnode: ntfs_readattr failed\n");
309 goto out;
310 }
311 }
312
313 /* Check if magic and fixups are correct */
314 error = ntfs_procfixups(ntmp, NTFS_FILEMAGIC(u_int32_t)(0x454C4946), (caddr_t)mfrp,
315 ntfs_bntob(ntmp->ntm_bpmftrec)(int32_t)((ntmp->ntm_bpmftrec) * (ntmp)->ntm_bootfile.bf_bps
));
316 if (error) {
317 printf("ntfs_loadntnode: BAD MFT RECORD %d\n",
318 (u_int32_t) ip->i_number);
319 goto out;
320 }
321
322 DPRINTF("ntfs_loadntnode: load attrs for ino: %u\n", ip->i_number);
323 off = mfrp->fr_attroff;
324 ap = (struct attr *) ((caddr_t)mfrp + off);
325
326 LIST_INIT(&ip->i_valist)do { ((&ip->i_valist)->lh_first) = ((void *)0); } while
(0);
327
328 while (ap->a_hdr.a_type != -1) {
329 error = ntfs_attrtontvattr(ntmp, &vap, ap);
330 if (error)
331 break;
332 vap->va_ip = ip;
333
334 LIST_INSERT_HEAD(&ip->i_valist, vap, va_list)do { if (((vap)->va_list.le_next = (&ip->i_valist)->
lh_first) != ((void *)0)) (&ip->i_valist)->lh_first
->va_list.le_prev = &(vap)->va_list.le_next; (&
ip->i_valist)->lh_first = (vap); (vap)->va_list.le_prev
= &(&ip->i_valist)->lh_first; } while (0);
335
336 off += ap->a_hdr.reclen;
337 ap = (struct attr *) ((caddr_t)mfrp + off);
338 }
339 if (error) {
340 printf("ntfs_loadntnode: failed to load attr ino: %d\n",
341 ip->i_number);
342 goto out;
343 }
344
345 ip->i_mainrec = mfrp->fr_mainrec;
346 ip->i_nlink = mfrp->fr_nlink;
347 ip->i_frflag = mfrp->fr_flags;
348
349 ip->i_flag |= IN_LOADED0x8000;
350
351 /* Add to loaded list. */
352 TAILQ_INSERT_HEAD(&ntmp->ntm_ntnodeq, ip, i_loaded)do { if (((ip)->i_loaded.tqe_next = (&ntmp->ntm_ntnodeq
)->tqh_first) != ((void *)0)) (&ntmp->ntm_ntnodeq)->
tqh_first->i_loaded.tqe_prev = &(ip)->i_loaded.tqe_next
; else (&ntmp->ntm_ntnodeq)->tqh_last = &(ip)->
i_loaded.tqe_next; (&ntmp->ntm_ntnodeq)->tqh_first =
(ip); (ip)->i_loaded.tqe_prev = &(&ntmp->ntm_ntnodeq
)->tqh_first; } while (0);
353 ntmp->ntm_ntnodes++;
354
355out:
356 free(mfrp, M_TEMP127, 0);
357 return (error);
358}
359
360/*
361 * Routine locks ntnode and increase usecount, just opposite of
362 * ntfs_ntput().
363 */
364int
365ntfs_ntget(struct ntnode *ip)
366{
367 DPRINTF("ntfs_ntget: get ntnode %u: %p, usecount: %d\n",
368 ip->i_number, ip, ip->i_usecount);
369
370 ip->i_usecount++;
371
372 rw_enter_write(&ip->i_lock);
373
374 return 0;
375}
376
377/*
378 * Routine search ntnode in hash, if found: lock, inc usecount and return.
379 * If not in hash allocate structure for ntnode, prefill it, lock,
380 * inc count and return.
381 *
382 * ntnode returned locked
383 */
384int
385ntfs_ntlookup(struct ntfsmount *ntmp, ntfsino_t ino, struct ntnode **ipp)
386{
387 struct ntnode *ip;
388
389 DPRINTF("ntfs_ntlookup: looking for ntnode %u\n", ino);
390
391 do {
392 if ((ip = ntfs_nthashlookup(ntmp->ntm_dev, ino)) != NULL((void *)0)) {
393 ntfs_ntget(ip);
394 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
395 ino, ip, ip->i_usecount);
396 *ipp = ip;
397 return (0);
398 }
399 } while (rw_enter(&ntfs_hashlock, RW_WRITE0x0001UL | RW_SLEEPFAIL0x0020UL));
400
401 ip = malloc(sizeof(*ip), M_NTFSNTNODE129, M_WAITOK0x0001 | M_ZERO0x0008);
402 DDPRINTF("ntfs_ntlookup: allocating ntnode: %u: %p\n", ino, ip);
403
404 /* Generic initialization */
405 ip->i_devvp = ntmp->ntm_devvp;
406 ip->i_dev = ntmp->ntm_dev;
407 ip->i_number = ino;
408 ip->i_mp = ntmp;
409
410 LIST_INIT(&ip->i_fnlist)do { ((&ip->i_fnlist)->lh_first) = ((void *)0); } while
(0);
411 vref(ip->i_devvp);
412
413 /* init lock and lock the newborn ntnode */
414 rw_init(&ip->i_lock, "ntnode")_rw_init_flags(&ip->i_lock, "ntnode", 0, ((void *)0));
415 ntfs_ntget(ip);
416
417 ntfs_nthashins(ip);
418
419 rw_exit(&ntfs_hashlock);
420
421 *ipp = ip;
422
423 DPRINTF("ntfs_ntlookup: ntnode %u: %p, usecount: %d\n",
424 ino, ip, ip->i_usecount);
425
426 return (0);
427}
428
429/*
430 * Decrement usecount of ntnode and unlock it, if usecount reach zero,
431 * deallocate ntnode.
432 *
433 * ntnode should be locked on entry, and unlocked on return.
434 */
435void
436ntfs_ntput(struct ntnode *ip)
437{
438 struct ntfsmount *ntmp = ip->i_mp;
439 struct ntvattr *vap;
440
441 DPRINTF("ntfs_ntput: rele ntnode %u: %p, usecount: %d\n",
442 ip->i_number, ip, ip->i_usecount);
443
444 ip->i_usecount--;
445
446#ifdef DIAGNOSTIC1
447 if (ip->i_usecount < 0) {
448 panic("ntfs_ntput: ino: %d usecount: %d ",
449 ip->i_number,ip->i_usecount);
450 }
451#endif
452
453 if (ip->i_usecount > 0) {
454 rw_exit_write(&ip->i_lock);
455 return;
456 }
457
458 DPRINTF("ntfs_ntput: deallocating ntnode: %u\n", ip->i_number);
459
460 if (LIST_FIRST(&ip->i_fnlist)((&ip->i_fnlist)->lh_first))
461 panic("ntfs_ntput: ntnode has fnodes");
462
463 ntfs_nthashrem(ip);
464
465 /* Remove from loaded list. */
466 if (ip->i_flag & IN_LOADED0x8000) {
467 TAILQ_REMOVE(&ntmp->ntm_ntnodeq, ip, i_loaded)do { if (((ip)->i_loaded.tqe_next) != ((void *)0)) (ip)->
i_loaded.tqe_next->i_loaded.tqe_prev = (ip)->i_loaded.tqe_prev
; else (&ntmp->ntm_ntnodeq)->tqh_last = (ip)->i_loaded
.tqe_prev; *(ip)->i_loaded.tqe_prev = (ip)->i_loaded.tqe_next
; ((ip)->i_loaded.tqe_prev) = ((void *)-1); ((ip)->i_loaded
.tqe_next) = ((void *)-1); } while (0);
468 ntmp->ntm_ntnodes--;
469 }
470
471 while ((vap = LIST_FIRST(&ip->i_valist)((&ip->i_valist)->lh_first)) != NULL((void *)0)) {
472 LIST_REMOVE(vap, va_list)do { if ((vap)->va_list.le_next != ((void *)0)) (vap)->
va_list.le_next->va_list.le_prev = (vap)->va_list.le_prev
; *(vap)->va_list.le_prev = (vap)->va_list.le_next; ((vap
)->va_list.le_prev) = ((void *)-1); ((vap)->va_list.le_next
) = ((void *)-1); } while (0);
473 ntfs_freentvattr(vap);
474 }
475
476 vrele(ip->i_devvp);
477 free(ip, M_NTFSNTNODE129, 0);
478}
479
480/*
481 * increment usecount of ntnode
482 */
483void
484ntfs_ntref(struct ntnode *ip)
485{
486 ip->i_usecount++;
487
488 DPRINTF("ntfs_ntref: ino %u, usecount: %d\n",
489 ip->i_number, ip->i_usecount);
490}
491
492/*
493 * Decrement usecount of ntnode.
494 */
495void
496ntfs_ntrele(struct ntnode *ip)
497{
498 DPRINTF("ntfs_ntrele: rele ntnode %u: %p, usecount: %d\n",
499 ip->i_number, ip, ip->i_usecount);
500
501 ip->i_usecount--;
502
503 if (ip->i_usecount < 0)
504 panic("ntfs_ntrele: ino: %d usecount: %d ",
505 ip->i_number,ip->i_usecount);
506}
507
508/*
509 * Deallocate all memory allocated for ntvattr
510 */
511void
512ntfs_freentvattr(struct ntvattr *vap)
513{
514 if (vap->va_flag & NTFS_AF_INRUN0x00000001) {
515 if (vap->va_vruncnva_d.vrun.cn)
516 free(vap->va_vruncnva_d.vrun.cn, M_NTFSRUN136, 0);
517 if (vap->va_vrunclva_d.vrun.cl)
518 free(vap->va_vrunclva_d.vrun.cl, M_NTFSRUN136, 0);
519 } else {
520 if (vap->va_datapva_d.datap)
521 free(vap->va_datapva_d.datap, M_NTFSRDATA134, 0);
522 }
523 free(vap, M_NTFSNTVATTR133, 0);
524}
525
526/*
527 * Convert disk image of attribute into ntvattr structure,
528 * runs are expanded also.
529 */
530int
531ntfs_attrtontvattr(struct ntfsmount *ntmp, struct ntvattr **rvapp,
532 struct attr *rap)
533{
534 int error, i;
535 struct ntvattr *vap;
536
537 error = 0;
538 *rvapp = NULL((void *)0);
539
540 vap = malloc(sizeof(*vap), M_NTFSNTVATTR133, M_WAITOK0x0001 | M_ZERO0x0008);
541 vap->va_ip = NULL((void *)0);
542 vap->va_flag = rap->a_hdr.a_flag;
543 vap->va_type = rap->a_hdr.a_type;
544 vap->va_compression = rap->a_hdr.a_compression;
545 vap->va_index = rap->a_hdr.a_index;
546
547 DDPRINTF("type: 0x%x, index: %u", vap->va_type, vap->va_index);
548
549 vap->va_namelen = rap->a_hdr.a_namelen;
550 if (rap->a_hdr.a_namelen) {
551 wchar *unp = (wchar *) ((caddr_t) rap + rap->a_hdr.a_nameoff);
552 DDPRINTF(", name:[");
553 for (i = 0; i < vap->va_namelen; i++) {
554 vap->va_name[i] = unp[i];
555 DDPRINTF("%c", vap->va_name[i]);
556 }
557 DDPRINTF("]");
558 }
559 if (vap->va_flag & NTFS_AF_INRUN0x00000001) {
560 DDPRINTF(", nonres.");
561 vap->va_datalen = rap->a_nra_S.a_S_nr.a_datalen;
562 vap->va_allocated = rap->a_nra_S.a_S_nr.a_allocated;
563 vap->va_vcnstart = rap->a_nra_S.a_S_nr.a_vcnstart;
564 vap->va_vcnend = rap->a_nra_S.a_S_nr.a_vcnend;
565 vap->va_compressalg = rap->a_nra_S.a_S_nr.a_compressalg;
566 error = ntfs_runtovrun(&(vap->va_vruncnva_d.vrun.cn), &(vap->va_vrunclva_d.vrun.cl),
567 &(vap->va_vruncntva_d.vrun.cnt),
568 (caddr_t) rap + rap->a_nra_S.a_S_nr.a_dataoff);
569 } else {
570 vap->va_compressalg = 0;
571 DDPRINTF(", res.");
572 vap->va_datalen = rap->a_ra_S.a_S_r.a_datalen;
573 vap->va_allocated = rap->a_ra_S.a_S_r.a_datalen;
574 vap->va_vcnstart = 0;
575 vap->va_vcnend = ntfs_btocn(vap->va_allocated)(cn_t)((vap->va_allocated) / ((ntmp)->ntm_bootfile.bf_spc
* (ntmp)->ntm_bootfile.bf_bps));
576 vap->va_datapva_d.datap = malloc(vap->va_datalen, M_NTFSRDATA134, M_WAITOK0x0001);
577 memcpy(vap->va_datap, (caddr_t) rap + rap->a_r.a_dataoff,__builtin_memcpy((vap->va_d.datap), ((caddr_t) rap + rap->
a_S.a_S_r.a_dataoff), (rap->a_S.a_S_r.a_datalen))
578 rap->a_r.a_datalen)__builtin_memcpy((vap->va_d.datap), ((caddr_t) rap + rap->
a_S.a_S_r.a_dataoff), (rap->a_S.a_S_r.a_datalen));
579 }
580 DDPRINTF(", len: %llu", vap->va_datalen);
581
582 if (error)
583 free(vap, M_NTFSNTVATTR133, 0);
584 else
585 *rvapp = vap;
586
587 DDPRINTF("\n");
588
589 return (error);
590}
591
592/*
593 * Expand run into more utilizable and more memory eating format.
594 */
595int
596ntfs_runtovrun(cn_t **rcnp, cn_t **rclp, u_long *rcntp, u_int8_t *run)
597{
598 u_int32_t off;
599 u_int32_t sz, i;
600 cn_t *cn;
601 cn_t *cl;
602 u_long cnt;
603 cn_t prev;
604 cn_t tmp;
605
606 off = 0;
607 cnt = 0;
608 while (run[off]) {
609 off += (run[off] & 0xF) + ((run[off] >> 4) & 0xF) + 1;
610 cnt++;
611 }
612 cn = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN136, M_WAITOK0x0001);
613 cl = mallocarray(cnt, sizeof(cn_t), M_NTFSRUN136, M_WAITOK0x0001);
614
615 off = 0;
616 cnt = 0;
617 prev = 0;
618 while (run[off]) {
619
620 sz = run[off++];
621 cl[cnt] = 0;
622
623 for (i = 0; i < (sz & 0xF); i++)
624 cl[cnt] += (u_int32_t) run[off++] << (i << 3);
625
626 sz >>= 4;
627 if (run[off + sz - 1] & 0x80) {
628 tmp = ((u_int64_t) - 1) << (sz << 3);
629 for (i = 0; i < sz; i++)
630 tmp |= (u_int64_t) run[off++] << (i << 3);
631 } else {
632 tmp = 0;
633 for (i = 0; i < sz; i++)
634 tmp |= (u_int64_t) run[off++] << (i << 3);
635 }
636 if (tmp)
637 prev = cn[cnt] = prev + tmp;
638 else
639 cn[cnt] = tmp;
640
641 cnt++;
642 }
643 *rcnp = cn;
644 *rclp = cl;
645 *rcntp = cnt;
646 return (0);
647}
648
649/*
650 * Compare unicode and ascii string case insens.
651 */
652int
653ntfs_uastricmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
654 const char *astr, size_t astrlen)
655{
656 size_t i;
657 int res;
658 const char *astrend = astr + astrlen;
659
660 for (i = 0; i < ustrlen && astr < astrend; i++) {
661 res = (*ntmp->ntm_wcmp)(NTFS_TOUPPER(ustr[i])(ntfs_toupper_tab[(unsigned char)(ustr[i])]),
662 NTFS_TOUPPER((*ntmp->ntm_wget)(&astr))(ntfs_toupper_tab[(unsigned char)((*ntmp->ntm_wget)(&astr
))]) );
663 if (res)
664 return res;
665 }
666
667 if (i == ustrlen && astr == astrend)
668 return 0;
669 else if (i == ustrlen)
670 return -1;
671 else
672 return 1;
673}
674
675/*
676 * Compare unicode and ascii string case sens.
677 */
678int
679ntfs_uastrcmp(struct ntfsmount *ntmp, const wchar *ustr, size_t ustrlen,
680 const char *astr, size_t astrlen)
681{
682 size_t i;
683 int res;
684 const char *astrend = astr + astrlen;
685
686 for (i = 0; (i < ustrlen) && (astr < astrend); i++) {
687 res = (*ntmp->ntm_wcmp)(ustr[i], (*ntmp->ntm_wget)(&astr));
688 if (res)
689 return res;
690 }
691
692 if (i == ustrlen && astr == astrend)
693 return 0;
694 else if (i == ustrlen)
695 return -1;
696 else
697 return 1;
698}
699
700/*
701 * Search fnode in ntnode, if not found allocate and preinitialize.
702 *
703 * ntnode should be locked on entry.
704 */
705int
706ntfs_fget(struct ntfsmount *ntmp, struct ntnode *ip, int attrtype,
707 char *attrname, struct fnode **fpp)
708{
709 struct fnode *fp;
710
711 DPRINTF("ntfs_fget: ino: %u, attrtype: 0x%x, attrname: %s\n",
712 ip->i_number, attrtype, attrname ? attrname : "");
713 *fpp = NULL((void *)0);
714 LIST_FOREACH(fp, &ip->i_fnlist, f_fnlist)for((fp) = ((&ip->i_fnlist)->lh_first); (fp)!= ((void
*)0); (fp) = ((fp)->f_fnlist.le_next)) {
715 DPRINTF("ntfs_fget: fnode: attrtype: %u, attrname: %s\n",
716 fp->f_attrtype, fp->f_attrname ? fp->f_attrname : "");
717
718 if ((attrtype == fp->f_attrtype) &&
719 ((!attrname && !fp->f_attrname) ||
720 (attrname && fp->f_attrname &&
721 !strcmp(attrname,fp->f_attrname)))){
722 DPRINTF("ntfs_fget: found existed: %p\n", fp);
723 *fpp = fp;
724 }
725 }
726
727 if (*fpp)
728 return (0);
729
730 fp = malloc(sizeof(*fp), M_NTFSFNODE130, M_WAITOK0x0001 | M_ZERO0x0008);
731 DPRINTF("ntfs_fget: allocating fnode: %p\n", fp);
732
733 fp->f_ip = ip;
734 fp->f_attrname = attrname;
735 if (fp->f_attrname) fp->f_flag |= FN_AATTRNAME0x0004;
736 fp->f_attrtype = attrtype;
737
738 ntfs_ntref(ip);
739
740 LIST_INSERT_HEAD(&ip->i_fnlist, fp, f_fnlist)do { if (((fp)->f_fnlist.le_next = (&ip->i_fnlist)->
lh_first) != ((void *)0)) (&ip->i_fnlist)->lh_first
->f_fnlist.le_prev = &(fp)->f_fnlist.le_next; (&
ip->i_fnlist)->lh_first = (fp); (fp)->f_fnlist.le_prev
= &(&ip->i_fnlist)->lh_first; } while (0);
741
742 *fpp = fp;
743
744 return (0);
745}
746
747/*
748 * Deallocate fnode, remove it from ntnode's fnode list.
749 *
750 * ntnode should be locked.
751 */
752void
753ntfs_frele(struct fnode *fp)
754{
755 struct ntnode *ip = FTONT(fp)((fp)->f_ip);
756
757 DPRINTF("ntfs_frele: fnode: %p for %u: %p\n", fp, ip->i_number, ip);
758
759 DPRINTF("ntfs_frele: deallocating fnode\n");
760 LIST_REMOVE(fp,f_fnlist)do { if ((fp)->f_fnlist.le_next != ((void *)0)) (fp)->f_fnlist
.le_next->f_fnlist.le_prev = (fp)->f_fnlist.le_prev; *(
fp)->f_fnlist.le_prev = (fp)->f_fnlist.le_next; ((fp)->
f_fnlist.le_prev) = ((void *)-1); ((fp)->f_fnlist.le_next)
= ((void *)-1); } while (0);
761 if (fp->f_flag & FN_AATTRNAME0x0004)
762 free(fp->f_attrname, M_TEMP127, 0);
763 if (fp->f_dirblbuf)
764 free(fp->f_dirblbuf, M_NTFSDIR131, 0);
765 free(fp, M_NTFSFNODE130, 0);
766 ntfs_ntrele(ip);
767}
768
769/*
770 * Lookup attribute name in format: [[:$ATTR_TYPE]:$ATTR_NAME],
771 * $ATTR_TYPE is searched in attrdefs read from $AttrDefs.
772 * If $ATTR_TYPE not specified, ATTR_A_DATA assumed.
773 */
774int
775ntfs_ntlookupattr(struct ntfsmount *ntmp, const char *name, int namelen,
776 int *attrtype, char **attrname)
777{
778 const char *sys;
779 size_t syslen, i;
780 struct ntvattrdef *adp;
781
782 if (namelen == 0)
783 return (0);
784
785 if (name[0] == '$') {
786 sys = name;
787 for (syslen = 0; syslen < namelen; syslen++) {
788 if(sys[syslen] == ':') {
789 name++;
790 namelen--;
791 break;
792 }
793 }
794 name += syslen;
795 namelen -= syslen;
796
797 adp = ntmp->ntm_ad;
798 for (i = 0; i < ntmp->ntm_adnum; i++, adp++){
799 if (syslen != adp->ad_namelen ||
800 strncmp(sys, adp->ad_name, syslen) != 0)
801 continue;
802
803 *attrtype = adp->ad_type;
804 goto out;
805 }
806 return (ENOENT2);
807 }
808
809 out:
810 if (namelen) {
811 *attrname = malloc(namelen + 1, M_TEMP127, M_WAITOK0x0001);
812 memcpy(*attrname, name, namelen)__builtin_memcpy((*attrname), (name), (namelen));
813 (*attrname)[namelen] = '\0';
814 *attrtype = NTFS_A_DATA0x80;
815 }
816
817 return (0);
818}
819
820/*
821 * Lookup specified node for filename, matching cnp, return fnode filled.
822 */
823int
824ntfs_ntlookupfile(struct ntfsmount *ntmp, struct vnode *vp,
825 struct componentname *cnp, struct vnode **vpp)
826{
827 struct fnode *fp = VTOF(vp)((struct fnode *)((vp)->v_data));
828 struct ntnode *ip = FTONT(fp)((fp)->f_ip);
829 struct ntvattr *vap = NULL((void *)0); /* Root attribute */
830 cn_t cn = 0; /* VCN in current attribute */
831 caddr_t rdbuf = NULL((void *)0); /* Buffer to read directory's blocks */
832 u_int32_t blsize;
833 u_int32_t rdsize; /* Length of data to read from current block */
834 struct attr_indexentry *iep;
835 int error, res, anamelen, fnamelen;
836 const char *fname,*aname;
837 u_int32_t aoff;
838 int attrtype = NTFS_A_DATA0x80;
839 char *attrname = NULL((void *)0);
840 struct fnode *nfp;
841 struct vnode *nvp;
842 enum vtype f_type;
843 int fullscan = 0;
844 struct ntfs_lookup_ctx *lookup_ctx = NULL((void *)0), *tctx;
845
846 error = ntfs_ntget(ip);
847 if (error)
848 return (error);
849
850 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT0x90, "$I30", 0, &vap);
851 if (error || (vap->va_flag & NTFS_AF_INRUN0x00000001)) {
852 error = ENOTDIR20;
853 goto fail;
854 }
855
856 /*
857 * Divide file name into: foofilefoofilefoofile[:attrspec]
858 * Store like this: fname:fnamelen [aname:anamelen]
859 */
860 fname = cnp->cn_nameptr;
861 aname = NULL((void *)0);
862 anamelen = 0;
863 for (fnamelen = 0; fnamelen < cnp->cn_namelen; fnamelen++)
864 if(fname[fnamelen] == ':') {
865 aname = fname + fnamelen + 1;
866 anamelen = cnp->cn_namelen - fnamelen - 1;
867 DPRINTF("ntfs_ntlookupfile: %s (%d), attr: %s (%d)\n",
868 fname, fnamelen, aname, anamelen);
869 break;
870 }
871
872 blsize = vap->va_a_irootva_d.iroot->ir_size;
873 DPRINTF("ntfs_ntlookupfile: blksz: %u\n", blsize);
874
875 rdbuf = malloc(blsize, M_TEMP127, M_WAITOK0x0001);
876
877 loop:
878 rdsize = vap->va_datalen;
879 DPRINTF("ntfs_ntlookupfile: rdsz: %u\n", rdsize);
880
881 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXROOT0x90, "$I30",
882 0, rdsize, rdbuf, NULL((void *)0));
883 if (error)
884 goto fail;
885
886 aoff = sizeof(struct attr_indexroot);
887
888 do {
889 iep = (struct attr_indexentry *) (rdbuf + aoff);
890
891 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST0x00000002) && (rdsize > aoff);
892 aoff += iep->reclen,
893 iep = (struct attr_indexentry *) (rdbuf + aoff))
894 {
895 DDPRINTF("scan: %u, %u\n", iep->ie_number,
896 iep->ie_fnametype);
897
898 /* check the name - the case-insensitive check
899 * has to come first, to break from this for loop
900 * if needed, so we can dive correctly */
901 res = ntfs_uastricmp(ntmp, iep->ie_fname,
902 iep->ie_fnamelen, fname, fnamelen);
903 if (!fullscan) {
904 if (res > 0) break;
905 if (res < 0) continue;
906 }
907
908 if (iep->ie_fnametype == 0 ||
909 !(ntmp->ntm_flag & NTFS_MFLAG_CASEINS0x00000001))
910 {
911 res = ntfs_uastrcmp(ntmp, iep->ie_fname,
912 iep->ie_fnamelen, fname, fnamelen);
913 if (res != 0 && !fullscan) continue;
914 }
915
916 /* if we perform full scan, the file does not match
917 * and this is subnode, dive */
918 if (fullscan && res != 0) {
919 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE0x00000001) {
920 tctx = malloc(sizeof(struct ntfs_lookup_ctx),
921 M_TEMP127, M_WAITOK0x0001);
922 tctx->aoff = aoff + iep->reclen;
923 tctx->rdsize = rdsize;
924 tctx->cn = cn;
925 tctx->prev = lookup_ctx;
926 lookup_ctx = tctx;
927 break;
928 } else
929 continue;
930 }
931
932 if (aname) {
933 error = ntfs_ntlookupattr(ntmp,
934 aname, anamelen,
935 &attrtype, &attrname);
936 if (error)
937 goto fail;
938 }
939
940 /* Check if we've found ourselves */
941 if ((iep->ie_number == ip->i_number) &&
942 (attrtype == fp->f_attrtype) &&
943 ((!attrname && !fp->f_attrname) ||
944 (attrname && fp->f_attrname &&
945 !strcmp(attrname, fp->f_attrname))))
946 {
947 vref(vp);
948 *vpp = vp;
949 error = 0;
950 goto fail;
951 }
952
953 /* free the buffer returned by ntfs_ntlookupattr() */
954 if (attrname) {
955 free(attrname, M_TEMP127, 0);
956 attrname = NULL((void *)0);
957 }
958
959 /* vget node, but don't load it */
960 error = ntfs_vgetex(ntmp->ntm_mountp,
961 iep->ie_number, attrtype, attrname,
962 LK_EXCLUSIVE0x0001UL, VG_DONTLOADIN0x0001 | VG_DONTVALIDFN0x0002,
963 &nvp);
964 if (error)
965 goto fail;
966
967 nfp = VTOF(nvp)((struct fnode *)((nvp)->v_data));
968
969 if (nfp->f_flag & FN_VALID0x0002) {
970 *vpp = nvp;
971 goto fail;
972 }
973
974 nfp->f_fflag = iep->ie_fflag;
975 nfp->f_pnumber = iep->ie_fpnumber;
976 nfp->f_times = iep->ie_ftimes;
977
978 if((nfp->f_fflag & NTFS_FFLAG_DIR0x10000000LL) &&
979 (nfp->f_attrtype == NTFS_A_DATA0x80) &&
980 (nfp->f_attrname == NULL((void *)0)))
981 f_type = VDIR;
982 else
983 f_type = VREG;
984
985 nvp->v_type = f_type;
986
987 if ((nfp->f_attrtype == NTFS_A_DATA0x80) &&
988 (nfp->f_attrname == NULL((void *)0)))
989 {
990 /* Opening default attribute */
991 nfp->f_size = iep->ie_fsize;
992 nfp->f_allocated = iep->ie_fallocated;
993 nfp->f_flag |= FN_PRELOADED0x0001;
994 } else {
995 error = ntfs_filesize(ntmp, nfp,
996 &nfp->f_size, &nfp->f_allocated);
997 if (error) {
998 vput(nvp);
999 goto fail;
1000 }
1001 }
1002
1003 nfp->f_flag &= ~FN_VALID0x0002;
1004 *vpp = nvp;
1005 goto fail;
1006 }
1007
1008 /* Dive if possible */
1009 if (iep->ie_flag & NTFS_IEFLAG_SUBNODE0x00000001) {
1010 DPRINTF("ntfs_ntlookupfile: diving\n");
1011
1012 cn = *(cn_t *) (rdbuf + aoff +
1013 iep->reclen - sizeof(cn_t));
1014 rdsize = blsize;
1015
1016 error = ntfs_readattr(ntmp, ip, NTFS_A_INDX0xA0, "$I30",
1017 ntfs_cntob(cn)(off_t)((cn) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps), rdsize, rdbuf, NULL((void *)0));
1018 if (error)
1019 goto fail;
1020
1021 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC(u_int32_t)(0x58444E49),
1022 rdbuf, rdsize);
1023 if (error)
1024 goto fail;
1025
1026 aoff = (((struct attr_indexalloc *) rdbuf)->ia_hdrsize +
1027 0x18);
1028 } else if (fullscan && lookup_ctx) {
1029 cn = lookup_ctx->cn;
1030 aoff = lookup_ctx->aoff;
1031 rdsize = lookup_ctx->rdsize;
1032
1033 error = ntfs_readattr(ntmp, ip,
1034 (cn == 0) ? NTFS_A_INDXROOT0x90 : NTFS_A_INDX0xA0,
1035 "$I30", ntfs_cntob(cn)(off_t)((cn) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps), rdsize, rdbuf, NULL((void *)0));
1036 if (error)
1037 goto fail;
1038
1039 if (cn != 0) {
1040 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC(u_int32_t)(0x58444E49),
1041 rdbuf, rdsize);
1042 if (error)
1043 goto fail;
1044 }
1045
1046 tctx = lookup_ctx;
1047 lookup_ctx = lookup_ctx->prev;
1048 free(tctx, M_TEMP127, 0);
1049 } else {
1050 DPRINTF("ntfs_ntlookupfile: nowhere to dive :-(\n");
1051 error = ENOENT2;
1052 break;
1053 }
1054 } while (1);
1055
1056 if (error == ENOENT2) {
1057 /* perform full scan if no entry was found */
1058 if (!fullscan) {
1059 fullscan = 1;
1060 cn = 0; /* need zero, used by lookup_ctx */
1061
1062 DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
1063 (unsigned int)fnamelen, fname);
1064 goto loop;
1065 }
1066
1067 if ((cnp->cn_flags & ISLASTCN0x008000) &&
1068 (cnp->cn_nameiop == CREATE1 || cnp->cn_nameiop == RENAME3))
1069 error = EJUSTRETURN-2;
1070 }
1071
1072 DPRINTF("finish\n");
1073
1074fail:
1075 if (vap)
1076 ntfs_ntvattrrele(vap);
1077 if (rdbuf)
1078 free(rdbuf, M_TEMP127, 0);
1079 if (attrname)
1080 free(attrname, M_TEMP127, 0);
1081 if (lookup_ctx) {
1082 while(lookup_ctx) {
1083 tctx = lookup_ctx;
1084 lookup_ctx = lookup_ctx->prev;
1085 free(tctx, M_TEMP127, 0);
1086 }
1087 }
1088 ntfs_ntput(ip);
1089 return (error);
1090}
1091
1092/*
1093 * Check if name type is permitted to show.
1094 */
1095int
1096ntfs_isnamepermitted(struct ntfsmount *ntmp, struct attr_indexentry *iep)
1097{
1098 if (ntmp->ntm_flag & NTFS_MFLAG_ALLNAMES0x00000002)
1099 return 1;
1100
1101 switch (iep->ie_fnametype) {
1102 case 2:
1103 DDPRINTF("ntfs_isnamepermitted: skipped DOS name\n");
1104 return 0;
1105 case 0: case 1: case 3:
1106 return 1;
1107 default:
1108 printf("ntfs_isnamepermitted: " \
1109 "WARNING! Unknown file name type: %d\n",
1110 iep->ie_fnametype);
1111 break;
1112 }
1113 return 0;
1114}
1115
1116/*
1117 * Read ntfs dir like stream of attr_indexentry, not like btree of them.
1118 * This is done by scanning $BITMAP:$I30 for busy clusters and reading them.
1119 * Of course $INDEX_ROOT:$I30 is read before. Last read values are stored in
1120 * fnode, so we can skip toward record number num almost immediately.
1121 * Anyway this is rather slow routine. The problem is that we don't know
1122 * how many records are there in $INDEX_ALLOCATION:$I30 block.
1123 */
1124int
1125ntfs_ntreaddir(struct ntfsmount *ntmp, struct fnode *fp, u_int32_t num,
1126 struct attr_indexentry **riepp, struct proc *p)
1127{
1128 struct ntnode *ip = FTONT(fp)((fp)->f_ip);
1129 struct ntvattr *vap = NULL((void *)0); /* IndexRoot attribute */
1130 struct ntvattr *bmvap = NULL((void *)0); /* BitMap attribute */
1131 struct ntvattr *iavap = NULL((void *)0); /* IndexAllocation attribute */
1132 caddr_t rdbuf; /* Buffer to read directory's blocks */
1133 u_int8_t *bmp = NULL((void *)0); /* Bitmap */
1134 u_int32_t blsize; /* Index allocation size (2048) */
1135 u_int32_t rdsize; /* Length of data to read */
1136 u_int32_t attrnum; /* Current attribute type */
1137 u_int32_t cpbl = 1; /* Clusters per directory block */
1138 u_int32_t blnum;
1139 struct attr_indexentry *iep;
1140 int error = ENOENT2;
1141 u_int32_t aoff, cnum;
1142
1143 DPRINTF("ntfs_ntreaddir: read ino: %u, num: %u\n", ip->i_number, num);
1144 error = ntfs_ntget(ip);
1145 if (error
0.1
'error' is 0
)
1
Taking false branch
→
1146 return (error);
1147
1148 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXROOT0x90, "$I30", 0, &vap);
2
←
Calling 'ntfs_ntvattrget'
→
1149 if (error) {
1150 error = ENOTDIR20;
1151 goto fail;
1152 }
1153
1154 if (fp->f_dirblbuf == NULL((void *)0)) {
1155 fp->f_dirblsz = vap->va_a_irootva_d.iroot->ir_size;
1156 fp->f_dirblbuf = malloc(MAX(vap->va_datalen,fp->f_dirblsz)(((vap->va_datalen)>(fp->f_dirblsz))?(vap->va_datalen
):(fp->f_dirblsz)),
1157 M_NTFSDIR131, M_WAITOK0x0001);
1158 }
1159
1160 blsize = fp->f_dirblsz;
1161 rdbuf = fp->f_dirblbuf;
1162
1163 DPRINTF("ntfs_ntreaddir: rdbuf: %p, blsize: %u\n", rdbuf, blsize);
1164
1165 if (vap->va_a_irootva_d.iroot->ir_flag & NTFS_IRFLAG_INDXALLOC0x00000001) {
1166 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDXBITMAP0xB0, "$I30",
1167 0, &bmvap);
1168 if (error) {
1169 error = ENOTDIR20;
1170 goto fail;
1171 }
1172 bmp = malloc(bmvap->va_datalen, M_TEMP127, M_WAITOK0x0001);
1173 error = ntfs_readattr(ntmp, ip, NTFS_A_INDXBITMAP0xB0, "$I30", 0,
1174 bmvap->va_datalen, bmp, NULL((void *)0));
1175 if (error)
1176 goto fail;
1177
1178 error = ntfs_ntvattrget(ntmp, ip, NTFS_A_INDX0xA0, "$I30",
1179 0, &iavap);
1180 if (error) {
1181 error = ENOTDIR20;
1182 goto fail;
1183 }
1184 cpbl = ntfs_btocn(blsize + ntfs_cntob(1) - 1)(cn_t)((blsize + (off_t)((1) * (ntmp)->ntm_bootfile.bf_spc
* (ntmp)->ntm_bootfile.bf_bps) - 1) / ((ntmp)->ntm_bootfile
.bf_spc * (ntmp)->ntm_bootfile.bf_bps));
1185 DPRINTF("ntfs_ntreaddir: indexalloc: %llu, cpbl: %u\n",
1186 iavap->va_datalen, cpbl);
1187 } else {
1188 DPRINTF("ntfs_ntreadidir: w/o BitMap and IndexAllocation\n");
1189 iavap = bmvap = NULL((void *)0);
1190 bmp = NULL((void *)0);
1191 }
1192
1193 /* Try use previous values */
1194 if ((fp->f_lastdnum < num) && (fp->f_lastdnum != 0)) {
1195 attrnum = fp->f_lastdattr;
1196 aoff = fp->f_lastdoff;
1197 blnum = fp->f_lastdblnum;
1198 cnum = fp->f_lastdnum;
1199 } else {
1200 attrnum = NTFS_A_INDXROOT0x90;
1201 aoff = sizeof(struct attr_indexroot);
1202 blnum = 0;
1203 cnum = 0;
1204 }
1205
1206 do {
1207 DPRINTF("ntfs_ntreaddir: scan: 0x%x, %u, %u, %u, %u\n",
1208 attrnum, blnum, cnum, num, aoff);
1209 rdsize = (attrnum == NTFS_A_INDXROOT0x90) ? vap->va_datalen : blsize;
1210 error = ntfs_readattr(ntmp, ip, attrnum, "$I30",
1211 ntfs_cntob(blnum * cpbl)(off_t)((blnum * cpbl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp
)->ntm_bootfile.bf_bps), rdsize, rdbuf, NULL((void *)0));
1212 if (error)
1213 goto fail;
1214
1215 if (attrnum == NTFS_A_INDX0xA0) {
1216 error = ntfs_procfixups(ntmp, NTFS_INDXMAGIC(u_int32_t)(0x58444E49),
1217 rdbuf, rdsize);
1218 if (error)
1219 goto fail;
1220 }
1221 if (aoff == 0)
1222 aoff = (attrnum == NTFS_A_INDX0xA0) ?
1223 (0x18 + ((struct attr_indexalloc *) rdbuf)->ia_hdrsize) :
1224 sizeof(struct attr_indexroot);
1225
1226 iep = (struct attr_indexentry *) (rdbuf + aoff);
1227 for (; !(iep->ie_flag & NTFS_IEFLAG_LAST0x00000002) && (rdsize > aoff);
1228 aoff += iep->reclen,
1229 iep = (struct attr_indexentry *) (rdbuf + aoff))
1230 {
1231 if (!ntfs_isnamepermitted(ntmp, iep)) continue;
1232
1233 if (cnum >= num) {
1234 fp->f_lastdnum = cnum;
1235 fp->f_lastdoff = aoff;
1236 fp->f_lastdblnum = blnum;
1237 fp->f_lastdattr = attrnum;
1238
1239 *riepp = iep;
1240
1241 error = 0;
1242 goto fail;
1243 }
1244 cnum++;
1245 }
1246
1247 if (iavap) {
1248 if (attrnum == NTFS_A_INDXROOT0x90)
1249 blnum = 0;
1250 else
1251 blnum++;
1252
1253 while (ntfs_cntob(blnum * cpbl)(off_t)((blnum * cpbl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp
)->ntm_bootfile.bf_bps) < iavap->va_datalen) {
1254 if (bmp[blnum >> 3] & (1 << (blnum & 7)))
1255 break;
1256 blnum++;
1257 }
1258
1259 attrnum = NTFS_A_INDX0xA0;
1260 aoff = 0;
1261 if (ntfs_cntob(blnum * cpbl)(off_t)((blnum * cpbl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp
)->ntm_bootfile.bf_bps) >= iavap->va_datalen)
1262 break;
1263 DPRINTF("ntfs_ntreaddir: blnum: %u\n", blnum);
1264 }
1265 } while (iavap);
1266
1267 *riepp = NULL((void *)0);
1268 fp->f_lastdnum = 0;
1269
1270fail:
1271 if (vap)
1272 ntfs_ntvattrrele(vap);
1273 if (bmvap)
1274 ntfs_ntvattrrele(bmvap);
1275 if (iavap)
1276 ntfs_ntvattrrele(iavap);
1277 if (bmp)
1278 free(bmp, M_TEMP127, 0);
1279 ntfs_ntput(ip);
1280
1281 return (error);
1282}
1283
1284/*
1285 * Convert NTFS times that are in 100 ns units and begins from
1286 * 1601 Jan 1 into unix times.
1287 */
1288struct timespec
1289ntfs_nttimetounix(u_int64_t nt)
1290{
1291 struct timespec t;
1292
1293 /* Windows NT times are in 100 ns and from 1601 Jan 1 */
1294 t.tv_nsec = (nt % (1000 * 1000 * 10)) * 100;
1295 t.tv_sec = nt / (1000 * 1000 * 10) -
1296 369LL * 365LL * 24LL * 60LL * 60LL -
1297 89LL * 1LL * 24LL * 60LL * 60LL;
1298 return (t);
1299}
1300
1301/*
1302 * Get file sizes from corresponding attribute.
1303 *
1304 * ntnode under fnode should be locked.
1305 */
1306int
1307ntfs_filesize(struct ntfsmount *ntmp, struct fnode *fp, u_int64_t *size,
1308 u_int64_t *bytes)
1309{
1310 struct ntvattr *vap;
1311 struct ntnode *ip = FTONT(fp)((fp)->f_ip);
1312 u_int64_t sz, bn;
1313 int error;
1314
1315 DPRINTF("ntfs_filesize: ino: %u\n", ip->i_number);
1316
1317 error = ntfs_ntvattrget(ntmp, ip,
1318 fp->f_attrtype, fp->f_attrname, 0, &vap);
1319 if (error)
1320 return (error);
1321
1322 bn = vap->va_allocated;
1323 sz = vap->va_datalen;
1324
1325 DPRINTF("ntfs_filesize: %llu bytes (%llu bytes allocated)\n", sz, bn);
1326
1327 if (size)
1328 *size = sz;
1329 if (bytes)
1330 *bytes = bn;
1331
1332 ntfs_ntvattrrele(vap);
1333
1334 return (0);
1335}
1336
1337/*
1338 * This is one of the read routines.
1339 *
1340 * ntnode should be locked.
1341 */
1342int
1343ntfs_readntvattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1344 struct ntvattr *vap, off_t roff, size_t rsize, void *rdata, size_t *initp,
1345 struct uio *uio)
1346{
1347 int error = 0;
1348 off_t off;
1349
1350 *initp = 0;
1351 if (vap->va_flag & NTFS_AF_INRUN0x00000001) {
1352 int cnt;
1353 cn_t ccn, ccl, cn, cl;
1354 caddr_t data = rdata;
1355 struct buf *bp;
1356 size_t left, tocopy;
1357
1358 DDPRINTF("ntfs_readntvattr_plain: data in run: %lu chains\n",
1359 vap->va_vruncnt);
1360
1361 off = roff;
1362 left = rsize;
1363 ccl = 0;
1364 ccn = 0;
1365 cnt = 0;
1366 while (left && (cnt < vap->va_vruncntva_d.vrun.cnt)) {
1367 ccn = vap->va_vruncnva_d.vrun.cn[cnt];
1368 ccl = vap->va_vrunclva_d.vrun.cl[cnt];
1369
1370 DDPRINTF("ntfs_readntvattr_plain: left %zu, "
1371 "cn: 0x%llx, cl: %llu, off: %lld\n",
1372 left, ccn, ccl, off);
1373
1374 if (ntfs_cntob(ccl)(off_t)((ccl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps) < off) {
1375 off -= ntfs_cntob(ccl)(off_t)((ccl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps);
1376 cnt++;
1377 continue;
1378 }
1379 if (ccn || ip->i_number == NTFS_BOOTINO7) {
1380 ccl -= ntfs_btocn(off)(cn_t)((off) / ((ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps));
1381 cn = ccn + ntfs_btocn(off)(cn_t)((off) / ((ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps));
1382 off = ntfs_btocnoff(off)(off_t)((off) % ((ntmp)->ntm_bootfile.bf_spc * (ntmp)->
ntm_bootfile.bf_bps));
1383
1384 while (left && ccl) {
1385 /*
1386 * Always read single clusters at a
1387 * time - we need to avoid reading
1388 * differently-sized blocks at the
1389 * same disk offsets to avoid
1390 * confusing the buffer cache.
1391 */
1392 tocopy = MIN(left,(((left)<((off_t)((1) * (ntmp)->ntm_bootfile.bf_spc * (
ntmp)->ntm_bootfile.bf_bps) - off))?(left):((off_t)((1) * (
ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile.bf_bps
) - off))
1393 ntfs_cntob(1) - off)(((left)<((off_t)((1) * (ntmp)->ntm_bootfile.bf_spc * (
ntmp)->ntm_bootfile.bf_bps) - off))?(left):((off_t)((1) * (
ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile.bf_bps
) - off));
1394 cl = ntfs_btocl(tocopy + off)(cn_t)((tocopy + off + (off_t)((1) * (ntmp)->ntm_bootfile.
bf_spc * (ntmp)->ntm_bootfile.bf_bps) - 1) / ((ntmp)->ntm_bootfile
.bf_spc * (ntmp)->ntm_bootfile.bf_bps));
1395 KASSERT(cl == 1 &&((cl == 1 && tocopy <= (off_t)((1) * (ntmp)->ntm_bootfile
.bf_spc * (ntmp)->ntm_bootfile.bf_bps)) ? (void)0 : __assert
("diagnostic ", "/usr/src/sys/ntfs/ntfs_subr.c", 1396, "cl == 1 && tocopy <= ntfs_cntob(1)"
))
1396 tocopy <= ntfs_cntob(1))((cl == 1 && tocopy <= (off_t)((1) * (ntmp)->ntm_bootfile
.bf_spc * (ntmp)->ntm_bootfile.bf_bps)) ? (void)0 : __assert
("diagnostic ", "/usr/src/sys/ntfs/ntfs_subr.c", 1396, "cl == 1 && tocopy <= ntfs_cntob(1)"
));
1397
1398 DDPRINTF("ntfs_readntvattr_plain: "
1399 "read: cn: 0x%llx cl: %llu, "
1400 "off: %lld, len: %zu, "
1401 "left: %zu\n",
1402 cn, cl, off, tocopy, left);
1403 error = bread(ntmp->ntm_devvp,
1404 ntfs_cntobn(cn)(daddr_t)((cn) * (ntmp->ntm_bootfile.bf_spc)),
1405 ntfs_cntob(cl)(off_t)((cl) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps),
1406 &bp);
1407 if (error) {
1408 brelse(bp);
1409 return (error);
1410 }
1411 if (uio) {
1412 error = uiomove(bp->b_data + off,
1413 tocopy, uio);
1414 if (error != 0)
1415 break;
1416 } else {
1417 memcpy(data, bp->b_data + off,__builtin_memcpy((data), (bp->b_data + off), (tocopy))
1418 tocopy)__builtin_memcpy((data), (bp->b_data + off), (tocopy));
1419 }
1420 brelse(bp);
1421 data = data + tocopy;
1422 *initp += tocopy;
1423 off = 0;
1424 left -= tocopy;
1425 cn += cl;
1426 ccl -= cl;
1427 }
1428 } else {
1429 tocopy = MIN(left, ntfs_cntob(ccl) - off)(((left)<((off_t)((ccl) * (ntmp)->ntm_bootfile.bf_spc *
(ntmp)->ntm_bootfile.bf_bps) - off))?(left):((off_t)((ccl
) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile.
bf_bps) - off));
1430 DDPRINTF("ntfs_readntvattr_plain: hole: "
1431 "ccn: 0x%llx ccl: %llu, off: %lld, "
1432 "len: %zu, left: %zu\n",
1433 ccn, ccl, off, tocopy, left);
1434 left -= tocopy;
1435 off = 0;
1436 if (uio) {
1437 size_t remains = tocopy;
1438 for(; remains; remains--) {
1439 error = uiomove("", 1, uio);
1440 if (error != 0)
1441 break;
1442 }
1443 } else
1444 bzero(data, tocopy)__builtin_bzero((data), (tocopy));
1445 data = data + tocopy;
1446 }
1447 cnt++;
1448 if (error != 0)
1449 break;
1450 }
1451 if (left && error == 0) {
1452 printf("ntfs_readntvattr_plain: POSSIBLE RUN ERROR\n");
1453 error = E2BIG7;
1454 }
1455 } else {
1456 DDPRINTF("ntfs_readnvattr_plain: data is in mft record\n");
1457 if (uio)
1458 error = uiomove(vap->va_datapva_d.datap + roff, rsize, uio);
1459 else
1460 memcpy(rdata, vap->va_datap + roff, rsize)__builtin_memcpy((rdata), (vap->va_d.datap + roff), (rsize
));
1461 *initp += rsize;
1462 }
1463
1464 return (error);
1465}
1466
1467/*
1468 * This is one of read routines.
1469 */
1470int
1471ntfs_readattr_plain(struct ntfsmount *ntmp, struct ntnode *ip,
1472 u_int32_t attrnum, char *attrname, off_t roff, size_t rsize, void *rdata,
1473 size_t *initp, struct uio *uio)
1474{
1475 size_t init;
1476 int error = 0;
1477 off_t off = roff;
1478 size_t left = rsize, toread;
1479 caddr_t data = rdata;
1480 struct ntvattr *vap;
1481 *initp = 0;
1482
1483 while (left) {
1484 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname,
1485 ntfs_btocn(off)(cn_t)((off) / ((ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps)), &vap);
1486 if (error)
1487 return (error);
1488 toread = MIN(left, ntfs_cntob(vap->va_vcnend + 1) - off)(((left)<((off_t)((vap->va_vcnend + 1) * (ntmp)->ntm_bootfile
.bf_spc * (ntmp)->ntm_bootfile.bf_bps) - off))?(left):((off_t
)((vap->va_vcnend + 1) * (ntmp)->ntm_bootfile.bf_spc * (
ntmp)->ntm_bootfile.bf_bps) - off));
1489 DDPRINTF("ntfs_readattr_plain: o: %lld, s: %zu "
1490 "(%llu - %llu)\n", off, toread,
1491 vap->va_vcnstart, vap->va_vcnend);
1492 error = ntfs_readntvattr_plain(ntmp, ip, vap,
1493 off - ntfs_cntob(vap->va_vcnstart)(off_t)((vap->va_vcnstart) * (ntmp)->ntm_bootfile.bf_spc
* (ntmp)->ntm_bootfile.bf_bps),
1494 toread, data, &init, uio);
1495 if (error) {
1496 printf("ntfs_readattr_plain: ntfs_readntvattr_plain "
1497 "failed: o: %lld, s: %zu\n", off, toread);
1498 printf("ntfs_readattr_plain: attrib: %llu - %llu\n",
1499 vap->va_vcnstart, vap->va_vcnend);
1500 ntfs_ntvattrrele(vap);
1501 break;
1502 }
1503 ntfs_ntvattrrele(vap);
1504 left -= toread;
1505 off += toread;
1506 data = data + toread;
1507 *initp += init;
1508 }
1509
1510 return (error);
1511}
1512
1513/*
1514 * This is one of read routines.
1515 */
1516int
1517ntfs_readattr(struct ntfsmount *ntmp, struct ntnode *ip, u_int32_t attrnum,
1518 char *attrname, off_t roff, size_t rsize, void *rdata, struct uio *uio)
1519{
1520 int error = 0;
1521 struct ntvattr *vap;
1522 size_t init;
1523
1524 DDPRINTF("ntfs_readattr: reading %u: 0x%x, from %lld size %zu bytes\n",
1525 ip->i_number, attrnum, roff, rsize);
1526
1527 error = ntfs_ntvattrget(ntmp, ip, attrnum, attrname, 0, &vap);
1528 if (error)
1529 return (error);
1530
1531 if ((roff > vap->va_datalen) ||
1532 (roff + rsize > vap->va_datalen)) {
1533 printf("ntfs_readattr: offset too big: %lld (%lld) > %llu\n",
1534 roff, roff + rsize, vap->va_datalen);
1535 ntfs_ntvattrrele(vap);
1536 return (E2BIG7);
1537 }
1538 if (vap->va_compression && vap->va_compressalg) {
1539 u_int8_t *cup;
1540 u_int8_t *uup;
1541 off_t off = roff;
1542 caddr_t data = rdata;
1543 cn_t cn;
1544 size_t left = rsize, tocopy;
1545
1546 DDPRINTF("ntfs_ntreadattr: compression: %u\n",
1547 vap->va_compressalg);
1548
1549 cup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL)(off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps), M_NTFSDECOMP135,
1550 M_WAITOK0x0001);
1551 uup = malloc(ntfs_cntob(NTFS_COMPUNIT_CL)(off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps), M_NTFSDECOMP135,
1552 M_WAITOK0x0001);
1553
1554 cn = (ntfs_btocn(roff)(cn_t)((roff) / ((ntmp)->ntm_bootfile.bf_spc * (ntmp)->
ntm_bootfile.bf_bps))) & (~(NTFS_COMPUNIT_CL16 - 1));
1555 off = roff - ntfs_cntob(cn)(off_t)((cn) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps);
1556
1557 while (left) {
1558 error = ntfs_readattr_plain(ntmp, ip, attrnum,
1559 attrname, ntfs_cntob(cn)(off_t)((cn) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps),
1560 ntfs_cntob(NTFS_COMPUNIT_CL)(off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps),
1561 cup, &init, NULL((void *)0));
1562 if (error)
1563 break;
1564
1565 tocopy = MIN(left, ntfs_cntob(NTFS_COMPUNIT_CL) - off)(((left)<((off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (
ntmp)->ntm_bootfile.bf_bps) - off))?(left):((off_t)((16) *
(ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile.bf_bps
) - off));
1566
1567 if (init == ntfs_cntob(NTFS_COMPUNIT_CL)(off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps)) {
1568 if (uio)
1569 error = uiomove(cup + off, tocopy, uio);
1570 else
1571 memcpy(data, cup + off, tocopy)__builtin_memcpy((data), (cup + off), (tocopy));
1572 } else if (init == 0) {
1573 if (uio) {
1574 size_t remains = tocopy;
1575 for(; remains; remains--) {
1576 error = uiomove("", 1, uio);
1577 if (error != 0)
1578 break;
1579 }
1580 }
1581 else
1582 bzero(data, tocopy)__builtin_bzero((data), (tocopy));
1583 } else {
1584 error = ntfs_uncompunit(ntmp, uup, cup);
1585 if (error)
1586 break;
1587 if (uio)
1588 error = uiomove(uup + off, tocopy, uio);
1589 else
1590 memcpy(data, uup + off, tocopy)__builtin_memcpy((data), (uup + off), (tocopy));
1591 }
1592 if (error)
1593 break;
1594
1595 left -= tocopy;
1596 data = data + tocopy;
1597 off += tocopy - ntfs_cntob(NTFS_COMPUNIT_CL)(off_t)((16) * (ntmp)->ntm_bootfile.bf_spc * (ntmp)->ntm_bootfile
.bf_bps);
1598 cn += NTFS_COMPUNIT_CL16;
1599 }
1600
1601 free(uup, M_NTFSDECOMP135, 0);
1602 free(cup, M_NTFSDECOMP135, 0);
1603 } else
1604 error = ntfs_readattr_plain(ntmp, ip, attrnum, attrname,
1605 roff, rsize, rdata, &init, uio);
1606 ntfs_ntvattrrele(vap);
1607 return (error);
1608}
1609
1610#if UNUSED_CODE
1611int
1612ntfs_parserun(cn_t *cn, cn_t *cl, u_int8_t *run, u_long len, u_long *off)
1613{
1614 u_int8_t sz;
1615 int i;
1616
1617 if (NULL((void *)0) == run) {
1618 printf("ntfs_parsetun: run == NULL\n");
1619 return (EINVAL22);
1620 }
1621 sz = run[(*off)++];
1622 if (0 == sz) {
1623 printf("ntfs_parserun: trying to go out of run\n");
1624 return (E2BIG7);
1625 }
1626 *cl = 0;
1627 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1628 printf("ntfs_parserun: " \
1629 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1630 sz, len, *off);
1631 return (EINVAL22);
1632 }
1633 for (i = 0; i < (sz & 0xF); i++)
1634 *cl += (u_int32_t) run[(*off)++] << (i << 3);
1635
1636 sz >>= 4;
1637 if ((sz & 0xF) > 8 || (*off) + (sz & 0xF) > len) {
1638 printf("ntfs_parserun: " \
1639 "bad run: length too big: sz: 0x%02x (%ld < %ld + sz)\n",
1640 sz, len, *off);
1641 return (EINVAL22);
1642 }
1643 for (i = 0; i < (sz & 0xF); i++)
1644 *cn += (u_int32_t) run[(*off)++] << (i << 3);
1645
1646 return (0);
1647}
1648#endif
1649
1650/*
1651 * Process fixup routine on given buffer.
1652 */
1653int
1654ntfs_procfixups(struct ntfsmount *ntmp, u_int32_t magic, caddr_t buf,
1655 size_t len)
1656{
1657 struct fixuphdr *fhp = (struct fixuphdr *) buf;
1658 int i;
1659 u_int16_t fixup;
1660 u_int16_t *fxp;
1661 u_int16_t *cfxp;
1662
1663 if (fhp->fh_magic != magic) {
1664 printf("ntfs_procfixups: magic doesn't match: %08x != %08x\n",
1665 fhp->fh_magic, magic);
1666 return (EINVAL22);
1667 }
1668 if ((fhp->fh_fnum - 1) * ntmp->ntm_bpsntm_bootfile.bf_bps != len) {
1669 printf("ntfs_procfixups: " \
1670 "bad fixups number: %d for %ld bytes block\n",
1671 fhp->fh_fnum, (long)len); /* XXX printf kludge */
1672 return (EINVAL22);
1673 }
1674 if (fhp->fh_foff >= ntmp->ntm_spcntm_bootfile.bf_spc * ntmp->ntm_mftrecszntm_bootfile.bf_mftrecsz * ntmp->ntm_bpsntm_bootfile.bf_bps) {
1675 printf("ntfs_procfixups: invalid offset: %x", fhp->fh_foff);
1676 return (EINVAL22);
1677 }
1678 fxp = (u_int16_t *) (buf + fhp->fh_foff);
1679 cfxp = (u_int16_t *) (buf + ntmp->ntm_bpsntm_bootfile.bf_bps - 2);
1680 fixup = *fxp++;
1681 for (i = 1; i < fhp->fh_fnum; i++, fxp++) {
1682 if (*cfxp != fixup) {
1683 printf("ntfs_procfixups: fixup %d doesn't match\n", i);
1684 return (EINVAL22);
1685 }
1686 *cfxp = *fxp;
1687 cfxp = (u_int16_t *)((caddr_t)cfxp + ntmp->ntm_bpsntm_bootfile.bf_bps);
1688 }
1689 return (0);
1690}
1691
1692#if UNUSED_CODE
1693int
1694ntfs_runtocn(cn_t *cn, struct ntfsmount *ntmp, u_int8_t *run, u_long len,
1695 cn_t vcn)
1696{
1697 cn_t ccn = 0;
1698 cn_t ccl = 0;
1699 u_long off = 0;
1700 int error = 0;
1701
1702#if NTFS_DEBUG
1703 int i;
1704 printf("ntfs_runtocn: run: %p, %ld bytes, vcn:%ld\n",
1705 run, len, (u_long) vcn);
1706 printf("ntfs_runtocn: run: ");
1707 for (i = 0; i < len; i++)
1708 printf("0x%02x ", run[i]);
1709 printf("\n");
1710#endif
1711
1712 if (NULL((void *)0) == run) {
1713 printf("ntfs_runtocn: run == NULL\n");
1714 return (EINVAL22);
1715 }
1716 do {
1717 if (run[off] == 0) {
1718 printf("ntfs_runtocn: vcn too big\n");
1719 return (E2BIG7);
1720 }
1721 vcn -= ccl;
1722 error = ntfs_parserun(&ccn, &ccl, run, len, &off);
1723 if (error) {
1724 printf("ntfs_runtocn: ntfs_parserun failed\n");
1725 return (error);
1726 }
1727 } while (ccl <= vcn);
1728 *cn = ccn + vcn;
1729 return (0);
1730}
1731#endif
1732
1733/*
1734 * if the ntfs_toupper_tab[] is filled already, just raise use count;
1735 * otherwise read the data from the filesystem we are currently mounting
1736 */
1737int
1738ntfs_toupper_use(struct mount *mp, struct ntfsmount *ntmp, struct proc *p)
1739{
1740 int error = 0;
1741 struct vnode *vp;
1742
1743 /* get exclusive access */
1744 rw_enter_write(&ntfs_toupper_lock);
1745
1746 /* only read the translation data from a file if it hasn't been
1747 * read already */
1748 if (ntfs_toupper_tab)
1749 goto out;
1750
1751 /*
1752 * Read in Unicode lowercase -> uppercase translation file.
1753 * XXX for now, just the first 256 entries are used anyway,
1754 * so don't bother reading more
1755 */
1756 ntfs_toupper_tab = malloc(256 * 256 * sizeof(wchar), M_NTFSRDATA134,
1757 M_WAITOK0x0001);
1758
1759 if ((error = VFS_VGET(mp, NTFS_UPCASEINO, &vp)(*(mp)->mnt_op->vfs_vget)(mp, 10, &vp)))
1760 goto out;
1761 error = ntfs_readattr(ntmp, VTONT(vp)((((struct fnode *)((vp)->v_data)))->f_ip), NTFS_A_DATA0x80, NULL((void *)0),
1762 0, 256*256*sizeof(wchar), (char *) ntfs_toupper_tab,
1763 NULL((void *)0));
1764 vput(vp);
1765
1766 out:
1767 ntfs_toupper_usecount++;
1768 rw_exit_write(&ntfs_toupper_lock);
1769 return (error);
1770}
1771
1772/*
1773 * lower the use count and if it reaches zero, free the memory
1774 * tied by toupper table
1775 */
1776void
1777ntfs_toupper_unuse(struct proc *p)
1778{
1779 /* get exclusive access */
1780 rw_enter_write(&ntfs_toupper_lock);
1781
1782 ntfs_toupper_usecount--;
1783 if (ntfs_toupper_usecount == 0) {
1784 free(ntfs_toupper_tab, M_NTFSRDATA134, 0);
1785 ntfs_toupper_tab = NULL((void *)0);
1786 }
1787#ifdef DIAGNOSTIC1
1788 else if (ntfs_toupper_usecount < 0) {
1789 panic("ntfs_toupper_unuse(): use count negative: %d",
1790 ntfs_toupper_usecount);
1791 }
1792#endif
1793
1794 /* release the lock */
1795 rw_exit_write(&ntfs_toupper_lock);
1796}