hammer2 - Start adding ioctl infrastructure, start writing hammer2 utility
[dragonfly.git] / sys / vfs / hammer2 / hammer2_vnops.c
CommitLineData
e118c14f
MD
1/*
2 * Copyright (c) 2011-2012 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
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 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
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35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/fcntl.h>
39#include <sys/buf.h>
40#include <sys/proc.h>
41#include <sys/namei.h>
42#include <sys/mount.h>
43#include <sys/vnode.h>
f0206a67 44#include <sys/mountctl.h>
e028fa74 45#include <sys/dirent.h>
4e2004ea 46#include <sys/uio.h>
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MD
47
48#include "hammer2.h"
49
db71f61f
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50#define ZFOFFSET (-2LL)
51
4e2004ea
MD
52static int hammer2_read_file(hammer2_inode_t *ip, struct uio *uio,
53 int seqcount);
1c9f601e
MD
54static int hammer2_write_file(hammer2_inode_t *ip, struct uio *uio, int ioflag,
55 int seqcount);
8cce658d
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56static hammer2_off_t hammer2_assign_physical(hammer2_inode_t *ip,
57 hammer2_key_t lbase, int lblksize, int *errorp);
58static void hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize);
3ac6a319 59static void hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize);
4e2004ea
MD
60static int hammer2_unlink_file(hammer2_inode_t *dip,
61 const uint8_t *name, size_t name_len,
db0c2eb3 62 int isdir, int adjlinks);
3ac6a319 63
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MD
64/*
65 * Last reference to a vnode is going away but it is still cached.
66 */
e118c14f 67static
703720e4 68int
e118c14f 69hammer2_vop_inactive(struct vop_inactive_args *ap)
703720e4
MD
70{
71 struct vnode *vp;
72 struct hammer2_inode *ip;
e118c14f 73#if 0
703720e4 74 struct hammer2_mount *hmp;
e118c14f 75#endif
703720e4 76
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MD
77 vp = ap->a_vp;
78 ip = VTOI(vp);
703720e4 79
df9ea374
MD
80 /*
81 * Degenerate case
82 */
83 if (ip == NULL) {
84 vrecycle(vp);
85 return (0);
86 }
87
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88 /*
89 * Detect updates to the embedded data which may be synchronized by
90 * the strategy code. Simply mark the inode modified so it gets
91 * picked up by our normal flush.
92 */
93 if (ip->chain.flags & HAMMER2_CHAIN_DIRTYEMBED) {
94 hammer2_inode_lock_ex(ip);
95 atomic_clear_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
01eabad4 96 hammer2_chain_modify(ip->hmp, &ip->chain, 0);
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97 hammer2_inode_unlock_ex(ip);
98 }
99
100 /*
101 * Check for deleted inodes and recycle immediately.
102 */
103 if (ip->chain.flags & HAMMER2_CHAIN_DELETED) {
104 vrecycle(vp);
105 }
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MD
106 return (0);
107}
108
109/*
110 * Reclaim a vnode so that it can be reused; after the inode is
111 * disassociated, the filesystem must manage it alone.
112 */
e118c14f 113static
703720e4 114int
e118c14f 115hammer2_vop_reclaim(struct vop_reclaim_args *ap)
703720e4 116{
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117 struct hammer2_inode *ip;
118 struct hammer2_mount *hmp;
b7926f31 119 struct vnode *vp;
703720e4 120
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121 vp = ap->a_vp;
122 ip = VTOI(vp);
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123 if (ip == NULL)
124 return(0);
9c2e0de0 125 hmp = ip->hmp;
b7926f31 126
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127 /*
128 * Set SUBMODIFIED so we can detect and propagate the DESTROYED
129 * bit in the flush code.
130 */
54eb943b 131 hammer2_inode_lock_ex(ip);
703720e4 132 vp->v_data = NULL;
0e92b724 133 ip->vp = NULL;
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MD
134 if (ip->chain.flags & HAMMER2_CHAIN_DELETED) {
135 atomic_set_int(&ip->chain.flags, HAMMER2_CHAIN_DESTROYED |
136 HAMMER2_CHAIN_SUBMODIFIED);
137 }
73e441b9 138 hammer2_chain_flush(hmp, &ip->chain);
54eb943b 139 hammer2_inode_unlock_ex(ip);
222d9e22 140 hammer2_chain_drop(hmp, &ip->chain); /* vp ref */
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141
142 /*
143 * XXX handle background sync when ip dirty, kernel will no longer
144 * notify us regarding this inode because there is no longer a
145 * vnode attached to it.
146 */
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147
148 return (0);
149}
150
e118c14f 151static
703720e4 152int
e118c14f 153hammer2_vop_fsync(struct vop_fsync_args *ap)
703720e4 154{
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MD
155 struct hammer2_inode *ip;
156 struct hammer2_mount *hmp;
157 struct vnode *vp;
158
159 vp = ap->a_vp;
160 ip = VTOI(vp);
161 hmp = ip->hmp;
162
163 hammer2_inode_lock_ex(ip);
164 vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
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165
166 /*
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167 * Detect updates to the embedded data which may be synchronized by
168 * the strategy code. Simply mark the inode modified so it gets
169 * picked up by our normal flush.
170 */
171 if (ip->chain.flags & HAMMER2_CHAIN_DIRTYEMBED) {
172 atomic_clear_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
01eabad4 173 hammer2_chain_modify(hmp, &ip->chain, 0);
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174 }
175
176 /*
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177 * Calling chain_flush here creates a lot of duplicative
178 * COW operations due to non-optimal vnode ordering.
179 *
180 * Only do it for an actual fsync() syscall. The other forms
181 * which call this function will eventually call chain_flush
182 * on the volume root as a catch-all, which is far more optimal.
183 */
184 if (ap->a_flags & VOP_FSYNC_SYSCALL)
185 hammer2_chain_flush(hmp, &ip->chain);
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186 hammer2_inode_unlock_ex(ip);
187 return (0);
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MD
188}
189
e118c14f 190static
703720e4 191int
e118c14f 192hammer2_vop_access(struct vop_access_args *ap)
703720e4 193{
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194 hammer2_inode_t *ip = VTOI(ap->a_vp);
195 uid_t uid;
196 gid_t gid;
197 int error;
198
199 uid = hammer2_to_unix_xid(&ip->ip_data.uid);
200 gid = hammer2_to_unix_xid(&ip->ip_data.gid);
201
202 error = vop_helper_access(ap, uid, gid, ip->ip_data.mode,
203 ip->ip_data.uflags);
204 return (error);
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MD
205}
206
e118c14f 207static
703720e4 208int
e118c14f 209hammer2_vop_getattr(struct vop_getattr_args *ap)
703720e4 210{
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211 hammer2_mount_t *hmp;
212 hammer2_inode_t *ip;
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213 struct vnode *vp;
214 struct vattr *vap;
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215
216 vp = ap->a_vp;
217 vap = ap->a_vap;
218
cd4b3d92
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219 ip = VTOI(vp);
220 hmp = ip->hmp;
221
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222 hammer2_inode_lock_sh(ip);
223
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224 vap->va_fsid = hmp->mp->mnt_stat.f_fsid.val[0];
225 vap->va_fileid = ip->ip_data.inum;
226 vap->va_mode = ip->ip_data.mode;
227 vap->va_nlink = ip->ip_data.nlinks;
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228 vap->va_uid = 0;
229 vap->va_gid = 0;
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230 vap->va_rmajor = 0;
231 vap->va_rminor = 0;
232 vap->va_size = ip->ip_data.size;
df9ea374 233 vap->va_blocksize = HAMMER2_PBUFSIZE;
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MD
234 vap->va_flags = ip->ip_data.uflags;
235 hammer2_time_to_timespec(ip->ip_data.ctime, &vap->va_ctime);
236 hammer2_time_to_timespec(ip->ip_data.mtime, &vap->va_mtime);
237 hammer2_time_to_timespec(ip->ip_data.mtime, &vap->va_atime);
238 vap->va_gen = 1;
866d5273 239 vap->va_bytes = vap->va_size; /* XXX */
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240 vap->va_type = hammer2_get_vtype(ip);
241 vap->va_filerev = 0;
242 vap->va_uid_uuid = ip->ip_data.uid;
243 vap->va_gid_uuid = ip->ip_data.gid;
244 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
245 VA_FSID_UUID_VALID;
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246
247 hammer2_inode_unlock_sh(ip);
248
249 return (0);
250}
251
e118c14f 252static
703720e4 253int
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254hammer2_vop_setattr(struct vop_setattr_args *ap)
255{
256 hammer2_mount_t *hmp;
257 hammer2_inode_t *ip;
258 struct vnode *vp;
259 struct vattr *vap;
260 int error;
261 int kflags = 0;
262 int doctime = 0;
263 int domtime = 0;
264
265 vp = ap->a_vp;
266 vap = ap->a_vap;
267
268 ip = VTOI(vp);
269 hmp = ip->hmp;
270
271 if (hmp->ronly)
272 return(EROFS);
273
274 hammer2_inode_lock_ex(ip);
275 error = 0;
276
277 if (vap->va_flags != VNOVAL) {
278 u_int32_t flags;
279
280 flags = ip->ip_data.uflags;
281 error = vop_helper_setattr_flags(&flags, vap->va_flags,
282 hammer2_to_unix_xid(&ip->ip_data.uid),
283 ap->a_cred);
284 if (error == 0) {
285 if (ip->ip_data.uflags != flags) {
01eabad4 286 hammer2_chain_modify(hmp, &ip->chain, 0);
3ac6a319
MD
287 ip->ip_data.uflags = flags;
288 doctime = 1;
289 kflags |= NOTE_ATTRIB;
290 }
291 if (ip->ip_data.uflags & (IMMUTABLE | APPEND)) {
292 error = 0;
293 goto done;
294 }
295 }
296 }
297
298 if (ip->ip_data.uflags & (IMMUTABLE | APPEND)) {
299 error = EPERM;
300 goto done;
301 }
302 /* uid, gid */
303
304 /*
305 * Resize the file
306 */
307 if (vap->va_size != VNOVAL && ip->ip_data.size != vap->va_size) {
308 switch(vp->v_type) {
309 case VREG:
310 if (vap->va_size == ip->ip_data.size)
311 break;
312 if (vap->va_size < ip->ip_data.size) {
3ac6a319 313 hammer2_truncate_file(ip, vap->va_size);
3ac6a319 314 } else {
8cce658d 315 hammer2_extend_file(ip, vap->va_size);
3ac6a319
MD
316 }
317 domtime = 1;
318 break;
319 default:
320 error = EINVAL;
321 goto done;
322 }
323 }
324done:
325 hammer2_inode_unlock_ex(ip);
326 return (error);
327}
328
329static
330int
e118c14f 331hammer2_vop_readdir(struct vop_readdir_args *ap)
703720e4 332{
e028fa74
MD
333 hammer2_mount_t *hmp;
334 hammer2_inode_t *ip;
335 hammer2_inode_t *xip;
336 hammer2_chain_t *parent;
337 hammer2_chain_t *chain;
338 hammer2_key_t lkey;
339 struct uio *uio;
340 off_t *cookies;
341 off_t saveoff;
342 int cookie_index;
343 int ncookies;
344 int error;
345 int dtype;
346 int r;
347
348 ip = VTOI(ap->a_vp);
349 hmp = ip->hmp;
350 uio = ap->a_uio;
351 saveoff = uio->uio_offset;
352
353 /*
354 * Setup cookies directory entry cookies if requested
355 */
356 if (ap->a_ncookies) {
357 ncookies = uio->uio_resid / 16 + 1;
358 if (ncookies > 1024)
359 ncookies = 1024;
360 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
361 } else {
362 ncookies = -1;
363 cookies = NULL;
364 }
365 cookie_index = 0;
366
367 /*
368 * Handle artificial entries. To ensure that only positive 64 bit
369 * quantities are returned to userland we always strip off bit 63.
370 * The hash code is designed such that codes 0x0000-0x7FFF are not
371 * used, allowing us to use these codes for articial entries.
372 *
373 * Entry 0 is used for '.' and entry 1 is used for '..'. Do not
374 * allow '..' to cross the mount point into (e.g.) the super-root.
375 */
376 error = 0;
37aa19df 377 chain = (void *)(intptr_t)-1; /* non-NULL for early goto done case */
e028fa74
MD
378
379 if (saveoff == 0) {
380 r = vop_write_dirent(&error, uio,
381 ip->ip_data.inum &
382 HAMMER2_DIRHASH_USERMSK,
383 DT_DIR, 1, ".");
384 if (r)
385 goto done;
386 if (cookies)
387 cookies[cookie_index] = saveoff;
388 ++saveoff;
389 ++cookie_index;
390 if (cookie_index == ncookies)
391 goto done;
392 }
393 if (saveoff == 1) {
394 if (ip->pip == NULL || ip == hmp->iroot)
395 xip = ip;
396 else
397 xip = ip->pip;
398
399 r = vop_write_dirent(&error, uio,
400 xip->ip_data.inum &
401 HAMMER2_DIRHASH_USERMSK,
402 DT_DIR, 2, "..");
403 if (r)
404 goto done;
405 if (cookies)
406 cookies[cookie_index] = saveoff;
407 ++saveoff;
408 ++cookie_index;
409 if (cookie_index == ncookies)
410 goto done;
411 }
412
413 lkey = saveoff | HAMMER2_DIRHASH_VISIBLE;
414
415 parent = &ip->chain;
01eabad4 416 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
e028fa74 417 if (error) {
01eabad4 418 hammer2_chain_unlock(hmp, parent);
e028fa74
MD
419 goto done;
420 }
37aa19df
MD
421 chain = hammer2_chain_lookup(hmp, &parent, lkey, lkey, 0);
422 if (chain == NULL) {
423 chain = hammer2_chain_lookup(hmp, &parent,
424 lkey, (hammer2_key_t)-1, 0);
425 }
e028fa74 426 while (chain) {
c667909f
MD
427 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
428 dtype = hammer2_get_dtype(chain->u.ip);
429 saveoff = chain->bref.key & HAMMER2_DIRHASH_USERMSK;
430 r = vop_write_dirent(&error, uio,
431 chain->u.ip->ip_data.inum &
432 HAMMER2_DIRHASH_USERMSK,
433 dtype, chain->u.ip->ip_data.name_len,
434 chain->u.ip->ip_data.filename);
435 if (r)
436 break;
437 if (cookies)
438 cookies[cookie_index] = saveoff;
439 ++cookie_index;
440 } else {
441 /* XXX chain error */
442 kprintf("bad chain type readdir %d\n",
443 chain->bref.type);
444 }
995e78dc
MD
445
446 /*
447 * Keys may not be returned in order so once we have a
448 * placemarker (chain) the scan must allow the full range
449 * or some entries will be missed.
450 */
e028fa74 451 chain = hammer2_chain_next(hmp, &parent, chain,
995e78dc 452 0, (hammer2_key_t)-1, 0);
028a55bb
MD
453 if (chain) {
454 saveoff = (chain->bref.key &
455 HAMMER2_DIRHASH_USERMSK) + 1;
456 } else {
457 saveoff = (hammer2_key_t)-1;
458 }
459 if (cookie_index == ncookies)
460 break;
e028fa74 461 }
028a55bb 462 if (chain)
01eabad4
MD
463 hammer2_chain_unlock(hmp, chain);
464 hammer2_chain_unlock(hmp, parent);
e028fa74
MD
465done:
466 if (ap->a_eofflag)
467 *ap->a_eofflag = (chain == NULL);
37aa19df 468 uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE;
e028fa74
MD
469 if (error && cookie_index == 0) {
470 if (cookies) {
471 kfree(cookies, M_TEMP);
472 *ap->a_ncookies = 0;
473 *ap->a_cookies = NULL;
474 }
475 } else {
476 if (cookies) {
477 *ap->a_ncookies = cookie_index;
478 *ap->a_cookies = cookies;
479 }
480 }
481 return (error);
703720e4
MD
482}
483
4e2004ea
MD
484/*
485 * hammer2_vop_readlink { vp, uio, cred }
486 */
487static
488int
489hammer2_vop_readlink(struct vop_readlink_args *ap)
490{
491 struct vnode *vp;
492 hammer2_mount_t *hmp;
493 hammer2_inode_t *ip;
494 int error;
495
496 vp = ap->a_vp;
497 if (vp->v_type != VLNK)
498 return (EINVAL);
499 ip = VTOI(vp);
500 hmp = ip->hmp;
501
502 error = hammer2_read_file(ip, ap->a_uio, 0);
503 return (error);
504}
505
e118c14f 506static
703720e4 507int
e118c14f 508hammer2_vop_read(struct vop_read_args *ap)
703720e4 509{
db71f61f
MD
510 struct vnode *vp;
511 hammer2_mount_t *hmp;
512 hammer2_inode_t *ip;
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MD
513 struct uio *uio;
514 int error;
515 int seqcount;
516 int bigread;
517
518 /*
519 * Read operations supported on this vnode?
520 */
521 vp = ap->a_vp;
522 if (vp->v_type != VREG)
523 return (EINVAL);
524
525 /*
526 * Misc
527 */
528 ip = VTOI(vp);
529 hmp = ip->hmp;
530 uio = ap->a_uio;
531 error = 0;
532
533 seqcount = ap->a_ioflag >> 16;
534 bigread = (uio->uio_resid > 100 * 1024 * 1024);
535
4e2004ea 536 error = hammer2_read_file(ip, uio, seqcount);
db71f61f 537 return (error);
47902fef 538}
703720e4 539
e118c14f 540static
47902fef 541int
e118c14f 542hammer2_vop_write(struct vop_write_args *ap)
47902fef 543{
db71f61f
MD
544 thread_t td;
545 struct vnode *vp;
546 hammer2_mount_t *hmp;
547 hammer2_inode_t *ip;
db71f61f
MD
548 struct uio *uio;
549 int error;
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MD
550 int seqcount;
551 int bigwrite;
552
553 /*
554 * Read operations supported on this vnode?
555 */
556 vp = ap->a_vp;
557 if (vp->v_type != VREG)
558 return (EINVAL);
559
560 /*
561 * Misc
562 */
563 ip = VTOI(vp);
564 hmp = ip->hmp;
565 uio = ap->a_uio;
566 error = 0;
db71f61f
MD
567 if (hmp->ronly)
568 return (EROFS);
569
570 seqcount = ap->a_ioflag >> 16;
571 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
572
573 /*
574 * Check resource limit
575 */
576 if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
577 uio->uio_offset + uio->uio_resid >
578 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
579 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
580 return (EFBIG);
581 }
582
583 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
584
585 /*
3ac6a319
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586 * ip must be locked if extending the file.
587 * ip must be locked to avoid racing a truncation.
8cce658d
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588 *
589 * ip must be marked modified, particularly because the write
590 * might wind up being copied into the embedded data area.
3ac6a319
MD
591 */
592 hammer2_inode_lock_ex(ip);
01eabad4 593 hammer2_chain_modify(hmp, &ip->chain, 0);
1c9f601e 594 error = hammer2_write_file(ip, uio, ap->a_ioflag, seqcount);
4e2004ea
MD
595
596 hammer2_inode_unlock_ex(ip);
597 return (error);
598}
599
600/*
601 * Perform read operations on a file or symlink given an UNLOCKED
602 * inode and uio.
603 */
604static
605int
606hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount)
607{
608 struct buf *bp;
609 int error;
610
611 error = 0;
612
613 /*
614 * UIO read loop
615 */
616 while (uio->uio_resid > 0 && uio->uio_offset < ip->ip_data.size) {
8cce658d
MD
617 hammer2_key_t lbase;
618 hammer2_key_t leof;
619 int lblksize;
620 int loff;
4e2004ea
MD
621 int n;
622
8cce658d
MD
623 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
624 &lbase, &leof);
4e2004ea 625
8cce658d 626 error = cluster_read(ip->vp, leof, lbase, lblksize,
6ba3b984
MD
627 uio->uio_resid, seqcount * BKVASIZE,
628 &bp);
8cce658d 629
4e2004ea
MD
630 if (error)
631 break;
8cce658d
MD
632 loff = (int)(uio->uio_offset - lbase);
633 n = lblksize - loff;
4e2004ea
MD
634 if (n > uio->uio_resid)
635 n = uio->uio_resid;
636 if (n > ip->ip_data.size - uio->uio_offset)
637 n = (int)(ip->ip_data.size - uio->uio_offset);
638 bp->b_flags |= B_AGE;
8cce658d 639 uiomove((char *)bp->b_data + loff, n, uio);
4e2004ea
MD
640 bqrelse(bp);
641 }
642 return (error);
643}
644
645/*
646 * Called with a locked (ip) to do the underlying write to a file or
647 * to build the symlink target.
648 */
649static
650int
1c9f601e
MD
651hammer2_write_file(hammer2_inode_t *ip, struct uio *uio,
652 int ioflag, int seqcount)
4e2004ea 653{
8cce658d 654 hammer2_key_t old_eof;
4e2004ea
MD
655 struct buf *bp;
656 int kflags;
657 int error;
3ac6a319 658
4e2004ea
MD
659 /*
660 * Setup if append
661 */
662 if (ioflag & IO_APPEND)
3ac6a319 663 uio->uio_offset = ip->ip_data.size;
4e2004ea
MD
664 kflags = 0;
665 error = 0;
3ac6a319
MD
666
667 /*
8cce658d
MD
668 * Extend the file if necessary. If the write fails at some point
669 * we will truncate it back down to cover as much as we were able
670 * to write.
671 *
672 * Doing this now makes it easier to calculate buffer sizes in
673 * the loop.
674 */
675 old_eof = ip->ip_data.size;
676 if (uio->uio_offset + uio->uio_resid > ip->ip_data.size) {
677 hammer2_extend_file(ip, uio->uio_offset + uio->uio_resid);
678 kflags |= NOTE_EXTEND;
679 }
680
681 /*
3ac6a319 682 * UIO write loop
db71f61f
MD
683 */
684 while (uio->uio_resid > 0) {
8cce658d
MD
685 hammer2_key_t lbase;
686 hammer2_key_t leof;
db71f61f 687 int trivial;
8cce658d
MD
688 int lblksize;
689 int loff;
690 int n;
db71f61f
MD
691
692 /*
693 * Don't allow the buffer build to blow out the buffer
694 * cache.
695 */
a92f82c4
MD
696 if ((ioflag & IO_RECURSE) == 0) {
697 /*
698 * XXX should try to leave this unlocked through
699 * the whole loop
700 */
701 hammer2_chain_unlock(ip->hmp, &ip->chain);
01eabad4
MD
702 bwillwrite(HAMMER2_PBUFSIZE);
703 hammer2_chain_lock(ip->hmp, &ip->chain,
704 HAMMER2_RESOLVE_ALWAYS);
a92f82c4 705 }
db71f61f 706
8cce658d
MD
707 /* XXX bigwrite & signal check test */
708
db71f61f 709 /*
8cce658d
MD
710 * This nominally tells us how much we can cluster and
711 * what the logical buffer size needs to be. Currently
712 * we don't try to cluster the write and just handle one
713 * block at a time.
db71f61f 714 */
8cce658d
MD
715 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
716 &lbase, &leof);
717 loff = (int)(uio->uio_offset - lbase);
718
719 /*
720 * Calculate bytes to copy this transfer and whether the
721 * copy completely covers the buffer or not.
722 */
723 trivial = 0;
724 n = lblksize - loff;
725 if (n > uio->uio_resid) {
726 n = uio->uio_resid;
727 if (uio->uio_offset + n == ip->ip_data.size)
db71f61f 728 trivial = 1;
8cce658d
MD
729 } else if (loff == 0) {
730 trivial = 1;
db71f61f
MD
731 }
732
8cce658d
MD
733 /*
734 * Get the buffer
735 */
db71f61f
MD
736 if (uio->uio_segflg == UIO_NOCOPY) {
737 /*
738 * Issuing a write with the same data backing the
739 * buffer. Instantiate the buffer to collect the
740 * backing vm pages, then read-in any missing bits.
741 *
742 * This case is used by vop_stdputpages().
743 */
8cce658d 744 bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
db71f61f
MD
745 if ((bp->b_flags & B_CACHE) == 0) {
746 bqrelse(bp);
8cce658d 747 error = bread(ip->vp, lbase, lblksize, &bp);
db71f61f 748 }
8cce658d 749 } else if (trivial) {
db71f61f
MD
750 /*
751 * Even though we are entirely overwriting the buffer
752 * we may still have to zero it out to avoid a
753 * mmap/write visibility issue.
754 */
8cce658d 755 bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
db71f61f
MD
756 if ((bp->b_flags & B_CACHE) == 0)
757 vfs_bio_clrbuf(bp);
db71f61f
MD
758 } else {
759 /*
760 * Partial overwrite, read in any missing bits then
761 * replace the portion being written.
8cce658d
MD
762 *
763 * (The strategy code will detect zero-fill physical
764 * blocks for this case).
db71f61f 765 */
8cce658d 766 error = bread(ip->vp, lbase, lblksize, &bp);
db71f61f
MD
767 if (error == 0)
768 bheavy(bp);
769 }
770
8cce658d
MD
771 if (error) {
772 brelse(bp);
773 break;
db71f61f
MD
774 }
775
8cce658d
MD
776 /*
777 * We have to assign physical storage to the buffer we intend
778 * to dirty or write now to avoid deadlocks in the strategy
779 * code later.
780 *
781 * This can return NOOFFSET for inode-embedded data. The
782 * strategy code will take care of it in that case.
783 */
784 bp->b_bio2.bio_offset =
785 hammer2_assign_physical(ip, lbase, lblksize, &error);
db71f61f
MD
786 if (error) {
787 brelse(bp);
db71f61f
MD
788 break;
789 }
8cce658d
MD
790
791 /*
792 * Ok, copy the data in
793 */
794 hammer2_chain_unlock(ip->hmp, &ip->chain);
795 error = uiomove(bp->b_data + loff, n, uio);
01eabad4 796 hammer2_chain_lock(ip->hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
db71f61f 797 kflags |= NOTE_WRITE;
8cce658d
MD
798
799 if (error) {
800 brelse(bp);
801 break;
802 }
803
db71f61f
MD
804 /* XXX update ino_data.mtime */
805
806 /*
807 * Once we dirty a buffer any cached offset becomes invalid.
1c9f601e
MD
808 *
809 * NOTE: For cluster_write() always use the trailing block
810 * size, which is HAMMER2_PBUFSIZE. lblksize is the
811 * eof-straddling blocksize and is incorrect.
db71f61f 812 */
db71f61f 813 bp->b_flags |= B_AGE;
4e2004ea 814 if (ioflag & IO_SYNC) {
db71f61f 815 bwrite(bp);
8cce658d 816 } else if ((ioflag & IO_DIRECT) && loff + n == lblksize) {
01eabad4 817 bp->b_flags |= B_CLUSTEROK;
8cce658d 818 bdwrite(bp);
4e2004ea 819 } else if (ioflag & IO_ASYNC) {
db71f61f 820 bawrite(bp);
1c9f601e
MD
821 } else if (hammer2_cluster_enable) {
822 bp->b_flags |= B_CLUSTEROK;
823 cluster_write(bp, leof, HAMMER2_PBUFSIZE, seqcount);
db71f61f 824 } else {
01eabad4 825 bp->b_flags |= B_CLUSTEROK;
db71f61f
MD
826 bdwrite(bp);
827 }
828 }
8cce658d
MD
829
830 /*
831 * Cleanup. If we extended the file EOF but failed to write through
832 * the entire write is a failure and we have to back-up.
833 */
834 if (error && ip->ip_data.size != old_eof)
835 hammer2_truncate_file(ip, old_eof);
4e2004ea
MD
836 /* hammer2_knote(ip->vp, kflags); */
837 return error;
703720e4
MD
838}
839
3ac6a319 840/*
8cce658d
MD
841 * Assign physical storage to a logical block.
842 *
843 * NOOFFSET is returned if the data is inode-embedded. In this case the
844 * strategy code will simply bcopy() the data into the inode.
845 */
846static
847hammer2_off_t
848hammer2_assign_physical(hammer2_inode_t *ip, hammer2_key_t lbase,
849 int lblksize, int *errorp)
850{
851 hammer2_mount_t *hmp;
852 hammer2_chain_t *parent;
853 hammer2_chain_t *chain;
854 hammer2_off_t pbase;
855
856 *errorp = 0;
857 hmp = ip->hmp;
858
859 /*
860 * Locate the chain associated with lbase, return a locked chain.
861 * However, do not instantiate any data reference (which utilizes a
862 * device buffer) because we will be using direct IO via the
863 * logical buffer cache buffer.
864 */
865 parent = &ip->chain;
01eabad4 866 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
8cce658d
MD
867
868 chain = hammer2_chain_lookup(hmp, &parent,
869 lbase, lbase,
870 HAMMER2_LOOKUP_NODATA);
871
872 if (chain == NULL) {
873 /*
01eabad4
MD
874 * We found a hole, create a new chain entry.
875 *
876 * NOTE: DATA chains are created without device backing
877 * store (nor do we want any).
8cce658d
MD
878 */
879 chain = hammer2_chain_create(hmp, parent, NULL,
880 lbase, HAMMER2_PBUFRADIX,
881 HAMMER2_BREF_TYPE_DATA,
882 lblksize);
883 pbase = chain->bref.data_off & ~HAMMER2_OFF_MASK_RADIX;
884 } else {
885 switch (chain->bref.type) {
886 case HAMMER2_BREF_TYPE_INODE:
887 /*
214f4a77
MD
888 * The data is embedded in the inode. The
889 * caller is responsible for marking the inode
890 * modified and copying the data to the embedded
891 * area.
8cce658d 892 */
8cce658d
MD
893 pbase = NOOFFSET;
894 break;
895 case HAMMER2_BREF_TYPE_DATA:
896 if (chain->bytes != lblksize) {
897 panic("hammer2_assign_physical: "
898 "size mismatch %d/%d\n",
899 lblksize, chain->bytes);
900 }
01eabad4
MD
901 hammer2_chain_modify(hmp, chain,
902 HAMMER2_MODIFY_OPTDATA);
8cce658d
MD
903 pbase = chain->bref.data_off & ~HAMMER2_OFF_MASK_RADIX;
904 break;
905 default:
906 panic("hammer2_assign_physical: bad type");
907 /* NOT REACHED */
908 pbase = NOOFFSET;
909 break;
910 }
911 }
912
913 if (chain)
01eabad4
MD
914 hammer2_chain_unlock(hmp, chain);
915 hammer2_chain_unlock(hmp, parent);
8cce658d
MD
916
917 return (pbase);
918}
919
920/*
921 * Truncate the size of a file.
922 *
923 * This routine adjusts ip->ip_data.size smaller, destroying any related
924 * data beyond the new EOF and potentially resizing the block straddling
925 * the EOF.
926 *
927 * The inode must be locked.
3ac6a319
MD
928 */
929static
930void
931hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize)
932{
933 hammer2_chain_t *parent;
934 hammer2_chain_t *chain;
935 hammer2_mount_t *hmp = ip->hmp;
8cce658d
MD
936 hammer2_key_t lbase;
937 hammer2_key_t leof;
938 struct buf *bp;
939 int loff;
3ac6a319 940 int error;
8cce658d
MD
941 int oblksize;
942 int nblksize;
943
01eabad4 944 hammer2_chain_modify(hmp, &ip->chain, 0);
8cce658d 945 bp = NULL;
3ac6a319
MD
946
947 /*
8cce658d
MD
948 * Destroy any logical buffer cache buffers beyond the file EOF.
949 *
950 * We call nvtruncbuf() w/ trivial == 1 to prevent it from messing
951 * around with the buffer straddling EOF, because we need to assign
952 * a new physical offset to it.
3ac6a319
MD
953 */
954 if (ip->vp) {
955 nvtruncbuf(ip->vp, nsize,
8cce658d
MD
956 HAMMER2_PBUFSIZE, (int)nsize & HAMMER2_PBUFMASK,
957 1);
3ac6a319 958 }
3ac6a319
MD
959
960 /*
8cce658d 961 * Setup for lookup/search
3ac6a319
MD
962 */
963 parent = &ip->chain;
01eabad4 964 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
3ac6a319 965 if (error) {
01eabad4 966 hammer2_chain_unlock(hmp, parent);
3ac6a319
MD
967 /* XXX error reporting */
968 return;
969 }
970
971 /*
8cce658d
MD
972 * Handle the case where a chain/logical-buffer straddles the new
973 * EOF. We told nvtruncbuf() above not to mess with the logical
974 * buffer straddling the EOF because we need to reassign its storage
975 * and can't let the strategy code do it for us.
3ac6a319 976 */
8cce658d
MD
977 loff = (int)nsize & HAMMER2_PBUFMASK;
978 if (loff && ip->vp) {
979 oblksize = hammer2_calc_logical(ip, nsize, &lbase, &leof);
980 error = bread(ip->vp, lbase, oblksize, &bp);
981 KKASSERT(error == 0);
982 }
983 ip->ip_data.size = nsize;
984 nblksize = hammer2_calc_logical(ip, nsize, &lbase, &leof);
3ac6a319 985
866d5273 986 /*
8cce658d
MD
987 * Fixup the chain element. If we have a logical buffer in-hand
988 * we don't want to create a conflicting device buffer.
866d5273 989 */
8cce658d
MD
990 if (loff && bp) {
991 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase,
01eabad4 992 HAMMER2_LOOKUP_NODATA);
8cce658d
MD
993 if (chain) {
994 allocbuf(bp, nblksize);
995 switch(chain->bref.type) {
996 case HAMMER2_BREF_TYPE_DATA:
01eabad4
MD
997 hammer2_chain_resize(hmp, chain,
998 hammer2_bytes_to_radix(nblksize),
999 HAMMER2_MODIFY_OPTDATA);
8cce658d
MD
1000 bzero(bp->b_data + loff, nblksize - loff);
1001 bp->b_bio2.bio_offset = chain->bref.data_off &
1002 HAMMER2_OFF_MASK;
1003 break;
1004 case HAMMER2_BREF_TYPE_INODE:
1005 bzero(bp->b_data + loff, nblksize - loff);
1006 bp->b_bio2.bio_offset = NOOFFSET;
1007 break;
1008 default:
1009 panic("hammer2_truncate_file: bad type");
1010 break;
1011 }
01eabad4
MD
1012 hammer2_chain_unlock(hmp, chain);
1013 bp->b_flags |= B_CLUSTEROK;
8cce658d
MD
1014 bdwrite(bp);
1015 } else {
1016 /*
1017 * Destroy clean buffer w/ wrong buffer size. Retain
1018 * backing store.
1019 */
1020 bp->b_flags |= B_RELBUF;
1021 KKASSERT(bp->b_bio2.bio_offset == NOOFFSET);
1022 KKASSERT((bp->b_flags & B_DIRTY) == 0);
1023 bqrelse(bp);
1024 }
1025 } else if (loff) {
01eabad4
MD
1026 /*
1027 * WARNING: This utilizes a device buffer for the data.
1028 *
1029 * XXX case should not occur
1030 */
1031 panic("hammer2_truncate_file: non-zero truncation, no-vnode");
8cce658d
MD
1032 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase, 0);
1033 if (chain) {
1034 switch(chain->bref.type) {
1035 case HAMMER2_BREF_TYPE_DATA:
1036 hammer2_chain_resize(hmp, chain,
01eabad4
MD
1037 hammer2_bytes_to_radix(nblksize),
1038 0);
1039 hammer2_chain_modify(hmp, chain, 0);
8cce658d
MD
1040 bzero(chain->data->buf + loff, nblksize - loff);
1041 break;
1042 case HAMMER2_BREF_TYPE_INODE:
1043 if (loff < HAMMER2_EMBEDDED_BYTES) {
01eabad4 1044 hammer2_chain_modify(hmp, chain, 0);
8cce658d
MD
1045 bzero(chain->data->ipdata.u.data + loff,
1046 HAMMER2_EMBEDDED_BYTES - loff);
1047 }
1048 break;
1049 }
01eabad4 1050 hammer2_chain_unlock(hmp, chain);
3ac6a319
MD
1051 }
1052 }
1053
866d5273 1054 /*
8cce658d
MD
1055 * Clean up any fragmentory VM pages now that we have properly
1056 * resized the straddling buffer. These pages are no longer
1057 * part of the buffer.
866d5273 1058 */
8cce658d
MD
1059 if (ip->vp) {
1060 nvtruncbuf(ip->vp, nsize,
1061 nblksize, (int)nsize & (nblksize - 1),
1062 1);
1063 }
866d5273 1064
8cce658d
MD
1065 /*
1066 * Destroy any physical blocks after the new EOF point.
1067 */
1068 lbase = (nsize + HAMMER2_PBUFMASK64) & ~HAMMER2_PBUFMASK64;
3ac6a319 1069 chain = hammer2_chain_lookup(hmp, &parent,
8cce658d 1070 lbase, (hammer2_key_t)-1,
01eabad4 1071 HAMMER2_LOOKUP_NODATA);
3ac6a319
MD
1072 while (chain) {
1073 /*
1074 * Degenerate embedded data case, nothing to loop on.
1075 */
8e12e3c9
MD
1076 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
1077 hammer2_chain_unlock(hmp, chain);
3ac6a319 1078 break;
8e12e3c9 1079 }
3ac6a319
MD
1080
1081 /*
1082 * Delete physical data blocks past the file EOF.
1083 */
1084 if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
1085 hammer2_chain_delete(hmp, parent, chain);
1086 }
db0c2eb3 1087 /* XXX check parent if empty indirect block & delete */
3ac6a319 1088 chain = hammer2_chain_next(hmp, &parent, chain,
8cce658d 1089 lbase, (hammer2_key_t)-1,
01eabad4 1090 HAMMER2_LOOKUP_NODATA);
3ac6a319 1091 }
01eabad4 1092 hammer2_chain_unlock(hmp, parent);
3ac6a319
MD
1093}
1094
1095/*
8cce658d 1096 * Extend the size of a file. The inode must be locked.
866d5273 1097 *
8cce658d 1098 * We may have to resize the block straddling the old EOF.
3ac6a319
MD
1099 */
1100static
1101void
8cce658d 1102hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize)
3ac6a319 1103{
8cce658d
MD
1104 hammer2_mount_t *hmp;
1105 hammer2_chain_t *parent;
1106 hammer2_chain_t *chain;
3ac6a319 1107 struct buf *bp;
8cce658d
MD
1108 hammer2_key_t osize;
1109 hammer2_key_t obase;
1110 hammer2_key_t nbase;
1111 hammer2_key_t leof;
1112 int oblksize;
1113 int nblksize;
1114 int nradix;
3ac6a319
MD
1115 int error;
1116
8cce658d
MD
1117 KKASSERT(ip->vp);
1118 hmp = ip->hmp;
1119
01eabad4 1120 hammer2_chain_modify(hmp, &ip->chain, 0);
8cce658d 1121
3ac6a319 1122 /*
8cce658d 1123 * Nothing to do if the direct-data case is still intact
3ac6a319
MD
1124 */
1125 if ((ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) &&
8cce658d
MD
1126 nsize <= HAMMER2_EMBEDDED_BYTES) {
1127 ip->ip_data.size = nsize;
1128 return;
1129 }
1130
1131 /*
1132 * Calculate the blocksize at the original EOF and resize the block
1133 * if necessary. Adjust the file size in the inode.
1134 */
1135 osize = ip->ip_data.size;
1136 oblksize = hammer2_calc_logical(ip, osize, &obase, &leof);
1137 ip->ip_data.size = nsize;
1138 nblksize = hammer2_calc_logical(ip, osize, &nbase, &leof);
1139
1140 /*
1141 * Do all required vnode operations, but do not mess with the
1142 * buffer straddling the orignal EOF.
1143 */
1144 nvextendbuf(ip->vp,
1145 ip->ip_data.size, nsize,
1146 0, nblksize,
1147 0, (int)nsize & HAMMER2_PBUFMASK,
1148 1);
1149
1150 /*
1151 * Early return if we have no more work to do.
1152 */
1153 if (obase == nbase && oblksize == nblksize &&
1154 (ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) == 0) {
1155 return;
1156 }
1157
1158 /*
1159 * We have work to do, including possibly resizing the buffer
1160 * at the EOF point and turning off DIRECTDATA mode.
1161 */
1162 bp = NULL;
1163 if (((int)osize & HAMMER2_PBUFMASK)) {
1164 error = bread(ip->vp, obase, oblksize, &bp);
3ac6a319 1165 KKASSERT(error == 0);
8cce658d
MD
1166
1167 if (obase != nbase) {
1168 allocbuf(bp, HAMMER2_PBUFSIZE);
1169 } else {
1170 allocbuf(bp, nblksize);
1171 }
1172 vfs_bio_clrbuf(bp);
1173 }
1174
1175 /*
1176 * Disable direct-data mode by loading up a buffer cache buffer
1177 * with the data, then converting the inode data area into the
1178 * inode indirect block array area.
1179 */
1180 if (ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
3ac6a319 1181 ip->ip_data.op_flags &= ~HAMMER2_OPFLAG_DIRECTDATA;
8cce658d 1182 bzero(&ip->ip_data.u.blockset, sizeof(ip->ip_data.u.blockset));
3ac6a319 1183 }
866d5273
MD
1184
1185 /*
8cce658d 1186 * Resize the chain element at the old EOF.
866d5273 1187 */
8cce658d
MD
1188 if (((int)osize & HAMMER2_PBUFMASK)) {
1189 parent = &ip->chain;
01eabad4 1190 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
8cce658d
MD
1191 KKASSERT(error == 0);
1192
1193 nradix = hammer2_bytes_to_radix(nblksize);
1194
1195 chain = hammer2_chain_lookup(hmp, &parent,
1196 obase, obase,
01eabad4 1197 HAMMER2_LOOKUP_NODATA);
8cce658d
MD
1198 if (chain == NULL) {
1199 chain = hammer2_chain_create(hmp, parent, NULL,
1200 obase, nblksize,
1201 HAMMER2_BREF_TYPE_DATA,
1c9f601e 1202 nblksize);
8cce658d
MD
1203 } else {
1204 KKASSERT(chain->bref.type == HAMMER2_BREF_TYPE_DATA);
01eabad4
MD
1205 hammer2_chain_resize(hmp, chain, nradix,
1206 HAMMER2_MODIFY_OPTDATA);
8cce658d
MD
1207 }
1208 bp->b_bio2.bio_offset = chain->bref.data_off &
1209 HAMMER2_OFF_MASK;
01eabad4
MD
1210 hammer2_chain_unlock(hmp, chain);
1211 bp->b_flags |= B_CLUSTEROK;
8cce658d 1212 bdwrite(bp);
01eabad4 1213 hammer2_chain_unlock(hmp, parent);
3ac6a319
MD
1214 }
1215}
1216
e118c14f 1217static
703720e4 1218int
e118c14f 1219hammer2_vop_nresolve(struct vop_nresolve_args *ap)
703720e4 1220{
37494cab
MD
1221 hammer2_inode_t *dip;
1222 hammer2_mount_t *hmp;
1223 hammer2_chain_t *parent;
1224 hammer2_chain_t *chain;
1225 struct namecache *ncp;
1226 const uint8_t *name;
1227 size_t name_len;
1228 hammer2_key_t lhc;
1229 int error = 0;
1230 struct vnode *vp;
1231
1232 dip = VTOI(ap->a_dvp);
1233 hmp = dip->hmp;
1234 ncp = ap->a_nch->ncp;
1235 name = ncp->nc_name;
1236 name_len = ncp->nc_nlen;
1237 lhc = hammer2_dirhash(name, name_len);
1238
1239 /*
1240 * Note: In DragonFly the kernel handles '.' and '..'.
1241 */
1242 parent = &dip->chain;
01eabad4 1243 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
37494cab 1244 chain = hammer2_chain_lookup(hmp, &parent,
c667909f
MD
1245 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1246 0);
37494cab
MD
1247 while (chain) {
1248 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1249 chain->u.ip &&
1250 name_len == chain->data->ipdata.name_len &&
1251 bcmp(name, chain->data->ipdata.filename, name_len) == 0) {
1252 break;
1253 }
1254 chain = hammer2_chain_next(hmp, &parent, chain,
c667909f
MD
1255 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1256 0);
37494cab 1257 }
01eabad4 1258 hammer2_chain_unlock(hmp, parent);
37494cab
MD
1259
1260 if (chain) {
1261 vp = hammer2_igetv(chain->u.ip, &error);
1262 if (error == 0) {
1263 vn_unlock(vp);
1264 cache_setvp(ap->a_nch, vp);
1265 vrele(vp);
1266 }
01eabad4 1267 hammer2_chain_unlock(hmp, chain);
37494cab
MD
1268 } else {
1269 error = ENOENT;
1270 cache_setvp(ap->a_nch, NULL);
1271 }
1272 return error;
1273}
1274
1275static
1276int
1277hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1278{
1279 hammer2_inode_t *dip;
1280 hammer2_inode_t *ip;
1281 hammer2_mount_t *hmp;
1282 int error;
1283
1284 dip = VTOI(ap->a_dvp);
1285 hmp = dip->hmp;
1286
1287 if ((ip = dip->pip) == NULL) {
1288 *ap->a_vpp = NULL;
1289 return ENOENT;
1290 }
01eabad4 1291 hammer2_chain_lock(hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
37494cab 1292 *ap->a_vpp = hammer2_igetv(ip, &error);
01eabad4 1293 hammer2_chain_unlock(hmp, &ip->chain);
37494cab
MD
1294
1295 return error;
1296}
1297
1298static
1299int
1300hammer2_vop_nmkdir(struct vop_nmkdir_args *ap)
1301{
1302 hammer2_mount_t *hmp;
1303 hammer2_inode_t *dip;
1304 hammer2_inode_t *nip;
1305 struct namecache *ncp;
1306 const uint8_t *name;
1307 size_t name_len;
1308 int error;
1309
1310 dip = VTOI(ap->a_dvp);
1311 hmp = dip->hmp;
db71f61f
MD
1312 if (hmp->ronly)
1313 return (EROFS);
1314
37494cab
MD
1315 ncp = ap->a_nch->ncp;
1316 name = ncp->nc_name;
1317 name_len = ncp->nc_nlen;
1318
db0c2eb3 1319 error = hammer2_inode_create(hmp, ap->a_vap, ap->a_cred,
37494cab
MD
1320 dip, name, name_len, &nip);
1321 if (error) {
1322 KKASSERT(nip == NULL);
1323 *ap->a_vpp = NULL;
1324 return error;
1325 }
1326 *ap->a_vpp = hammer2_igetv(nip, &error);
01eabad4 1327 hammer2_chain_unlock(hmp, &nip->chain);
37494cab
MD
1328
1329 if (error == 0) {
1330 cache_setunresolved(ap->a_nch);
1331 cache_setvp(ap->a_nch, *ap->a_vpp);
1332 }
1333 return error;
703720e4
MD
1334}
1335
db71f61f
MD
1336/*
1337 * Return the largest contiguous physical disk range for the logical
1338 * request.
1339 *
1340 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
1341 */
e118c14f 1342static
703720e4 1343int
e118c14f 1344hammer2_vop_bmap(struct vop_bmap_args *ap)
703720e4 1345{
db71f61f
MD
1346 struct vnode *vp;
1347 hammer2_mount_t *hmp;
1348 hammer2_inode_t *ip;
1349 hammer2_chain_t *parent;
1350 hammer2_chain_t *chain;
6ba3b984
MD
1351 hammer2_key_t lbeg;
1352 hammer2_key_t lend;
1353 hammer2_off_t pbeg;
1354 hammer2_off_t pbytes;
1355 hammer2_off_t array[HAMMER2_BMAP_COUNT][2];
1356 int loff;
1357 int ai;
db71f61f
MD
1358
1359 /*
1360 * Only supported on regular files
1361 *
1362 * Only supported for read operations (required for cluster_read).
1363 * The block allocation is delayed for write operations.
1364 */
1365 vp = ap->a_vp;
1366 if (vp->v_type != VREG)
1367 return (EOPNOTSUPP);
1368 if (ap->a_cmd != BUF_CMD_READ)
1369 return (EOPNOTSUPP);
1370
1371 ip = VTOI(vp);
1372 hmp = ip->hmp;
6ba3b984 1373 bzero(array, sizeof(array));
5b4a2132 1374
6ba3b984
MD
1375 /*
1376 * Calculate logical range
1377 */
1378 KKASSERT((ap->a_loffset & HAMMER2_LBUFMASK64) == 0);
1379 lbeg = ap->a_loffset & HAMMER2_OFF_MASK_HI;
1380 lend = lbeg + HAMMER2_BMAP_COUNT * HAMMER2_PBUFSIZE - 1;
1381 if (lend < lbeg)
1382 lend = lbeg;
1383 loff = ap->a_loffset & HAMMER2_OFF_MASK_LO;
db71f61f
MD
1384
1385 parent = &ip->chain;
01eabad4 1386 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
6ba3b984
MD
1387 chain = hammer2_chain_lookup(hmp, &parent,
1388 lbeg, lend,
01eabad4 1389 HAMMER2_LOOKUP_NODATA);
3ac6a319 1390 if (chain == NULL) {
3ac6a319 1391 *ap->a_doffsetp = ZFOFFSET;
01eabad4 1392 hammer2_chain_unlock(hmp, parent);
6ba3b984
MD
1393 return (0);
1394 }
1395
1396 while (chain) {
1397 if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
1398 ai = (chain->bref.key - lbeg) / HAMMER2_PBUFSIZE;
1399 KKASSERT(ai >= 0 && ai < HAMMER2_BMAP_COUNT);
1400 array[ai][0] = chain->bref.data_off & HAMMER2_OFF_MASK;
1401 array[ai][1] = chain->bytes;
1402 }
1403 chain = hammer2_chain_next(hmp, &parent, chain,
1404 lbeg, lend,
01eabad4 1405 HAMMER2_LOOKUP_NODATA);
db71f61f 1406 }
01eabad4 1407 hammer2_chain_unlock(hmp, parent);
6ba3b984
MD
1408
1409 /*
1410 * If the requested loffset is not mappable physically we can't
1411 * bmap. The caller will have to access the file data via a
1412 * device buffer.
1413 */
1414 if (array[0][0] == 0 || array[0][1] < loff + HAMMER2_LBUFSIZE) {
1415 *ap->a_doffsetp = NOOFFSET;
1416 return (0);
1417 }
1418
1419 /*
1420 * Calculate the physical disk offset range for array[0]
1421 */
1422 pbeg = array[0][0] + loff;
1423 pbytes = array[0][1] - loff;
1424
1425 for (ai = 1; ai < HAMMER2_BMAP_COUNT; ++ai) {
1426 if (array[ai][0] != pbeg + pbytes)
1427 break;
1428 pbytes += array[ai][1];
1429 }
1430
1431 *ap->a_doffsetp = pbeg;
1432 if (ap->a_runp)
1433 *ap->a_runp = pbytes;
db71f61f 1434 return (0);
703720e4
MD
1435}
1436
e118c14f 1437static
703720e4 1438int
e118c14f 1439hammer2_vop_open(struct vop_open_args *ap)
703720e4 1440{
703720e4
MD
1441 return vop_stdopen(ap);
1442}
1443
37aa19df 1444/*
db0c2eb3 1445 * hammer2_vop_advlock { vp, id, op, fl, flags }
37aa19df
MD
1446 */
1447static
1448int
1449hammer2_vop_advlock(struct vop_advlock_args *ap)
1450{
1451 hammer2_inode_t *ip = VTOI(ap->a_vp);
1452
1453 return (lf_advlock(ap, &ip->advlock, ip->ip_data.size));
1454}
1455
1456
c667909f
MD
1457static
1458int
1459hammer2_vop_close(struct vop_close_args *ap)
1460{
1461 return vop_stdclose(ap);
1462}
1463
1464/*
db0c2eb3
MD
1465 * hammer2_vop_nlink { nch, dvp, vp, cred }
1466 *
1467 * Create a hardlink to vp.
1468 */
1469static
1470int
1471hammer2_vop_nlink(struct vop_nlink_args *ap)
1472{
1473 hammer2_inode_t *dip;
1474 hammer2_inode_t *ip; /* inode we are hardlinking to */
1475 hammer2_mount_t *hmp;
1476 struct namecache *ncp;
1477 const uint8_t *name;
1478 size_t name_len;
1479 int error;
1480
1481 dip = VTOI(ap->a_dvp);
1482 hmp = dip->hmp;
1483 if (hmp->ronly)
1484 return (EROFS);
1485
1486 ip = VTOI(ap->a_vp);
1487
1488 ncp = ap->a_nch->ncp;
1489 name = ncp->nc_name;
1490 name_len = ncp->nc_nlen;
1491
1492 error = hammer2_hardlink_create(ip, dip, name, name_len);
1493 if (error == 0) {
1494 cache_setunresolved(ap->a_nch);
1495 cache_setvp(ap->a_nch, ap->a_vp);
1496 }
1497 return error;
1498}
1499
1500/*
1501 * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
c667909f
MD
1502 *
1503 * The operating system has already ensured that the directory entry
1504 * does not exist and done all appropriate namespace locking.
1505 */
1506static
1507int
1508hammer2_vop_ncreate(struct vop_ncreate_args *ap)
1509{
1510 hammer2_mount_t *hmp;
1511 hammer2_inode_t *dip;
1512 hammer2_inode_t *nip;
1513 struct namecache *ncp;
1514 const uint8_t *name;
1515 size_t name_len;
1516 int error;
1517
1518 dip = VTOI(ap->a_dvp);
1519 hmp = dip->hmp;
1520 if (hmp->ronly)
1521 return (EROFS);
1522
1523 ncp = ap->a_nch->ncp;
1524 name = ncp->nc_name;
1525 name_len = ncp->nc_nlen;
1526
db0c2eb3 1527 error = hammer2_inode_create(hmp, ap->a_vap, ap->a_cred,
c667909f
MD
1528 dip, name, name_len, &nip);
1529 if (error) {
1530 KKASSERT(nip == NULL);
1531 *ap->a_vpp = NULL;
1532 return error;
1533 }
1534 *ap->a_vpp = hammer2_igetv(nip, &error);
01eabad4 1535 hammer2_chain_unlock(hmp, &nip->chain);
c667909f
MD
1536
1537 if (error == 0) {
1538 cache_setunresolved(ap->a_nch);
1539 cache_setvp(ap->a_nch, *ap->a_vpp);
1540 }
1541 return error;
1542}
1543
4e2004ea
MD
1544/*
1545 * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1546 */
1547static
1548int
1549hammer2_vop_nsymlink(struct vop_nsymlink_args *ap)
1550{
1551 hammer2_mount_t *hmp;
1552 hammer2_inode_t *dip;
1553 hammer2_inode_t *nip;
1554 struct namecache *ncp;
1555 const uint8_t *name;
1556 size_t name_len;
1557 int error;
1558
1559 dip = VTOI(ap->a_dvp);
1560 hmp = dip->hmp;
1561 if (hmp->ronly)
1562 return (EROFS);
1563
1564 ncp = ap->a_nch->ncp;
1565 name = ncp->nc_name;
1566 name_len = ncp->nc_nlen;
1567
1568 ap->a_vap->va_type = VLNK; /* enforce type */
1569
db0c2eb3 1570 error = hammer2_inode_create(hmp, ap->a_vap, ap->a_cred,
4e2004ea
MD
1571 dip, name, name_len, &nip);
1572 if (error) {
1573 KKASSERT(nip == NULL);
1574 *ap->a_vpp = NULL;
1575 return error;
1576 }
1577 *ap->a_vpp = hammer2_igetv(nip, &error);
1578
1579 /*
1580 * Build the softlink (~like file data) and finalize the namecache.
1581 */
1582 if (error == 0) {
1583 size_t bytes;
1584 struct uio auio;
1585 struct iovec aiov;
1586
1587 bytes = strlen(ap->a_target);
1588
1589 if (bytes <= HAMMER2_EMBEDDED_BYTES) {
1590 KKASSERT(nip->ip_data.op_flags &
1591 HAMMER2_OPFLAG_DIRECTDATA);
1592 bcopy(ap->a_target, nip->ip_data.u.data, bytes);
1593 nip->ip_data.size = bytes;
1594 } else {
1595 bzero(&auio, sizeof(auio));
1596 bzero(&aiov, sizeof(aiov));
1597 auio.uio_iov = &aiov;
1598 auio.uio_segflg = UIO_SYSSPACE;
1599 auio.uio_rw = UIO_WRITE;
1600 auio.uio_resid = bytes;
1601 auio.uio_iovcnt = 1;
1602 auio.uio_td = curthread;
1603 aiov.iov_base = ap->a_target;
1604 aiov.iov_len = bytes;
1c9f601e 1605 error = hammer2_write_file(nip, &auio, IO_APPEND, 0);
4e2004ea
MD
1606 /* XXX handle error */
1607 error = 0;
1608 }
1609 }
01eabad4 1610 hammer2_chain_unlock(hmp, &nip->chain);
4e2004ea
MD
1611
1612 /*
1613 * Finalize namecache
1614 */
1615 if (error == 0) {
1616 cache_setunresolved(ap->a_nch);
1617 cache_setvp(ap->a_nch, *ap->a_vpp);
1618 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1619 }
1620 return error;
1621}
1622
1623/*
1624 * hammer2_vop_nremove { nch, dvp, cred }
1625 */
1626static
1627int
1628hammer2_vop_nremove(struct vop_nremove_args *ap)
1629{
1630 hammer2_inode_t *dip;
1631 hammer2_mount_t *hmp;
1632 struct namecache *ncp;
1633 const uint8_t *name;
1634 size_t name_len;
1635 int error;
1636
1637 dip = VTOI(ap->a_dvp);
1638 hmp = dip->hmp;
1639 if (hmp->ronly)
1640 return(EROFS);
1641
1642 ncp = ap->a_nch->ncp;
1643 name = ncp->nc_name;
1644 name_len = ncp->nc_nlen;
1645
db0c2eb3 1646 error = hammer2_unlink_file(dip, name, name_len, 0, 1);
4e2004ea
MD
1647
1648 if (error == 0) {
1649 cache_setunresolved(ap->a_nch);
1650 cache_setvp(ap->a_nch, NULL);
1651 }
1652 return (error);
1653}
1654
1655/*
1656 * hammer2_vop_nrmdir { nch, dvp, cred }
1657 */
1658static
1659int
1660hammer2_vop_nrmdir(struct vop_nrmdir_args *ap)
1661{
1662 hammer2_inode_t *dip;
1663 hammer2_mount_t *hmp;
1664 struct namecache *ncp;
1665 const uint8_t *name;
1666 size_t name_len;
1667 int error;
1668
1669 dip = VTOI(ap->a_dvp);
1670 hmp = dip->hmp;
1671 if (hmp->ronly)
1672 return(EROFS);
1673
1674 ncp = ap->a_nch->ncp;
1675 name = ncp->nc_name;
1676 name_len = ncp->nc_nlen;
1677
db0c2eb3 1678 error = hammer2_unlink_file(dip, name, name_len, 1, 1);
4e2004ea
MD
1679
1680 if (error == 0) {
1681 cache_setunresolved(ap->a_nch);
1682 cache_setvp(ap->a_nch, NULL);
1683 }
1684 return (error);
1685}
1686
6934ae32
MD
1687/*
1688 * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1689 */
4e2004ea
MD
1690static
1691int
1692hammer2_vop_nrename(struct vop_nrename_args *ap)
1693{
6934ae32
MD
1694 struct namecache *fncp;
1695 struct namecache *tncp;
1696 hammer2_inode_t *fdip;
1697 hammer2_inode_t *tdip;
1698 hammer2_inode_t *ip;
1699 hammer2_mount_t *hmp;
1700 const uint8_t *fname;
1701 size_t fname_len;
1702 const uint8_t *tname;
1703 size_t tname_len;
1704 int error;
1705
1706 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1707 return(EXDEV);
1708 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1709 return(EXDEV);
1710
1711 fdip = VTOI(ap->a_fdvp); /* source directory */
1712 tdip = VTOI(ap->a_tdvp); /* target directory */
1713
1714 hmp = fdip->hmp; /* check read-only filesystem */
1715 if (hmp->ronly)
1716 return(EROFS);
1717
1718 fncp = ap->a_fnch->ncp; /* entry name in source */
1719 fname = fncp->nc_name;
1720 fname_len = fncp->nc_nlen;
1721
1722 tncp = ap->a_tnch->ncp; /* entry name in target */
1723 tname = tncp->nc_name;
1724 tname_len = tncp->nc_nlen;
1725
1726 ip = VTOI(fncp->nc_vp); /* inode being moved */
1727
1728 /*
1729 * Keep a tight grip on the inode as removing it should disconnect
1730 * it and we don't want to destroy it.
222d9e22
MD
1731 *
1732 * NOTE: To avoid deadlocks we cannot lock (ip) while we are
1733 * unlinking elements from their directories.
6934ae32
MD
1734 */
1735 hammer2_chain_ref(hmp, &ip->chain);
6934ae32
MD
1736
1737 /*
1738 * Remove target if it exists
1739 */
db0c2eb3 1740 error = hammer2_unlink_file(tdip, tname, tname_len, -1, 1);
6934ae32
MD
1741 if (error && error != ENOENT)
1742 goto done;
1743 cache_setunresolved(ap->a_tnch);
1744 cache_setvp(ap->a_tnch, NULL);
1745
1746 /*
db0c2eb3
MD
1747 * Disconnect ip from the source directory, do not adjust
1748 * the link count. Note that rename doesn't need to understand
1749 * whether this is a hardlink or not, we can just rename the
1750 * forwarding entry and don't even have to adjust the related
1751 * hardlink's link count.
6934ae32 1752 */
db0c2eb3 1753 error = hammer2_unlink_file(fdip, fname, fname_len, -1, 0);
6934ae32
MD
1754 if (error)
1755 goto done;
1756
1757 if (ip->chain.parent != NULL)
1758 panic("hammer2_vop_nrename(): rename source != ip!");
1759
1760 /*
1761 * Reconnect ip to target directory.
1c9f601e
MD
1762 *
1763 * WARNING: chain locks can lock buffer cache buffers, to avoid
1764 * deadlocks we want to unlock before issuing a cache_*()
1765 * op (that might have to lock a vnode).
6934ae32 1766 */
01eabad4 1767 hammer2_chain_lock(hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
db0c2eb3 1768 error = hammer2_inode_connect(tdip, ip, tname, tname_len);
1c9f601e 1769 hammer2_chain_unlock(hmp, &ip->chain);
6934ae32
MD
1770
1771 if (error == 0) {
1772 cache_rename(ap->a_fnch, ap->a_tnch);
1773 }
222d9e22 1774done:
01eabad4 1775 hammer2_chain_drop(hmp, &ip->chain); /* from ref up top */
6934ae32
MD
1776
1777 return (error);
4e2004ea
MD
1778}
1779
6934ae32
MD
1780/*
1781 * Unlink the file from the specified directory inode. The directory inode
1782 * does not need to be locked.
db0c2eb3
MD
1783 *
1784 * isdir determines whether a directory/non-directory check should be made.
1785 * No check is made if isdir is set to -1.
1786 *
1787 * adjlinks tells unlink that we want to adjust the nlinks count of the
1788 * inode. When removing the last link for a NON forwarding entry we can
1789 * just ignore the link count... no point updating the inode that we are
1790 * about to dereference, it would just result in a lot of wasted I/O.
1791 *
1792 * However, if the entry is a forwarding entry (aka a hardlink), and adjlinks
1793 * is non-zero, we have to locate the hardlink and adjust its nlinks field.
6934ae32 1794 */
4e2004ea
MD
1795static
1796int
1797hammer2_unlink_file(hammer2_inode_t *dip, const uint8_t *name, size_t name_len,
db0c2eb3 1798 int isdir, int adjlinks)
4e2004ea
MD
1799{
1800 hammer2_mount_t *hmp;
1801 hammer2_chain_t *parent;
1802 hammer2_chain_t *chain;
1803 hammer2_chain_t *dparent;
1804 hammer2_chain_t *dchain;
1805 hammer2_key_t lhc;
4e2004ea
MD
1806 int error;
1807
1808 error = 0;
4e2004ea
MD
1809
1810 hmp = dip->hmp;
1811 lhc = hammer2_dirhash(name, name_len);
1812
1813 /*
1814 * Search for the filename in the directory
1815 */
1816 parent = &dip->chain;
01eabad4 1817 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
4e2004ea
MD
1818 chain = hammer2_chain_lookup(hmp, &parent,
1819 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1820 0);
1821 while (chain) {
1822 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1823 chain->u.ip &&
1824 name_len == chain->data->ipdata.name_len &&
1825 bcmp(name, chain->data->ipdata.filename, name_len) == 0) {
1826 break;
1827 }
1828 chain = hammer2_chain_next(hmp, &parent, chain,
1829 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1830 0);
1831 }
1832
1833 /*
6934ae32 1834 * Not found or wrong type (isdir < 0 disables the type check).
4e2004ea
MD
1835 */
1836 if (chain == NULL) {
01eabad4 1837 hammer2_chain_unlock(hmp, parent);
4e2004ea
MD
1838 return ENOENT;
1839 }
6934ae32
MD
1840 if (chain->data->ipdata.type == HAMMER2_OBJTYPE_DIRECTORY &&
1841 isdir == 0) {
4e2004ea
MD
1842 error = ENOTDIR;
1843 goto done;
1844 }
6934ae32
MD
1845 if (chain->data->ipdata.type != HAMMER2_OBJTYPE_DIRECTORY &&
1846 isdir == 1) {
4e2004ea
MD
1847 error = EISDIR;
1848 goto done;
1849 }
1850
1851 /*
6934ae32
MD
1852 * If this is a directory the directory must be empty. However, if
1853 * isdir < 0 we are doing a rename and the directory does not have
1854 * to be empty.
4e2004ea 1855 */
6934ae32
MD
1856 if (chain->data->ipdata.type == HAMMER2_OBJTYPE_DIRECTORY &&
1857 isdir >= 0) {
4e2004ea 1858 dparent = chain;
01eabad4 1859 hammer2_chain_lock(hmp, dparent, HAMMER2_RESOLVE_ALWAYS);
4e2004ea
MD
1860 dchain = hammer2_chain_lookup(hmp, &dparent,
1861 0, (hammer2_key_t)-1,
01eabad4 1862 HAMMER2_LOOKUP_NODATA);
4e2004ea 1863 if (dchain) {
01eabad4
MD
1864 hammer2_chain_unlock(hmp, dchain);
1865 hammer2_chain_unlock(hmp, dparent);
4e2004ea
MD
1866 error = ENOTEMPTY;
1867 goto done;
1868 }
01eabad4 1869 hammer2_chain_unlock(hmp, dparent);
4e2004ea
MD
1870 dparent = NULL;
1871 /* dchain NULL */
1872 }
1873
db0c2eb3
MD
1874#if 0
1875 /*
1876 * If adjlinks is non-zero this is a real deletion (otherwise it is
1877 * probably a rename). XXX
1878 */
1879 if (adjlinks) {
1880 if (chain->data->ipdata.type == HAMMER2_OBJTYPE_HARDLINK) {
1881 /*hammer2_adjust_hardlink(chain->u.ip, -1);*/
1882 /* error handling */
1883 } else {
1884 waslastlink = 1;
1885 }
1886 } else {
1887 waslastlink = 0;
1888 }
1889#endif
1890
4e2004ea
MD
1891 /*
1892 * Found, the chain represents the inode. Remove the parent reference
1893 * to the chain. The chain itself is no longer referenced and will
1894 * be marked unmodified by hammer2_chain_delete(), avoiding unnecessary
1895 * I/O.
1896 */
1897 hammer2_chain_delete(hmp, parent, chain);
1898 /* XXX nlinks (hardlink special case) */
1899 /* XXX nlinks (parent directory) */
1900
db0c2eb3
MD
1901#if 0
1902 /*
1903 * Destroy any associated vnode, but only if this was the last
1904 * link. XXX this might not be needed.
1905 */
6934ae32 1906 if (chain->u.ip->vp) {
db0c2eb3 1907 struct vnode *vp;
6934ae32
MD
1908 vp = hammer2_igetv(chain->u.ip, &error);
1909 if (error == 0) {
1910 vn_unlock(vp);
1911 /* hammer2_knote(vp, NOTE_DELETE); */
1912 cache_inval_vp(vp, CINV_DESTROY);
1913 vrele(vp);
1914 }
4e2004ea 1915 }
db0c2eb3 1916#endif
4e2004ea
MD
1917 error = 0;
1918
1919done:
01eabad4
MD
1920 hammer2_chain_unlock(hmp, chain);
1921 hammer2_chain_unlock(hmp, parent);
4e2004ea
MD
1922
1923 return error;
1924}
1925
1926
db71f61f
MD
1927static int hammer2_strategy_read(struct vop_strategy_args *ap);
1928static int hammer2_strategy_write(struct vop_strategy_args *ap);
1929
e118c14f 1930static
703720e4 1931int
e118c14f 1932hammer2_vop_strategy(struct vop_strategy_args *ap)
703720e4 1933{
703720e4
MD
1934 struct bio *biop;
1935 struct buf *bp;
703720e4
MD
1936 int error;
1937
703720e4
MD
1938 biop = ap->a_bio;
1939 bp = biop->bio_buf;
703720e4
MD
1940
1941 switch(bp->b_cmd) {
9c2e0de0 1942 case BUF_CMD_READ:
db71f61f 1943 error = hammer2_strategy_read(ap);
01eabad4 1944 ++hammer2_iod_file_read;
db71f61f 1945 break;
9c2e0de0 1946 case BUF_CMD_WRITE:
db71f61f 1947 error = hammer2_strategy_write(ap);
01eabad4 1948 ++hammer2_iod_file_write;
db71f61f 1949 break;
703720e4
MD
1950 default:
1951 bp->b_error = error = EINVAL;
1952 bp->b_flags |= B_ERROR;
1953 biodone(biop);
1954 break;
1955 }
1956
1957 return (error);
1958}
1959
e118c14f 1960static
db71f61f
MD
1961int
1962hammer2_strategy_read(struct vop_strategy_args *ap)
1963{
1964 struct buf *bp;
1965 struct bio *bio;
1966 struct bio *nbio;
1967 hammer2_mount_t *hmp;
1968 hammer2_inode_t *ip;
1969 hammer2_chain_t *parent;
1970 hammer2_chain_t *chain;
8cce658d 1971 hammer2_key_t lbase;
db71f61f
MD
1972
1973 bio = ap->a_bio;
1974 bp = bio->bio_buf;
1975 ip = VTOI(ap->a_vp);
1976 hmp = ip->hmp;
1977 nbio = push_bio(bio);
1978
8cce658d 1979 lbase = bio->bio_offset;
866d5273 1980 chain = NULL;
8cce658d 1981 KKASSERT(((int)lbase & HAMMER2_PBUFMASK) == 0);
db71f61f 1982
866d5273
MD
1983 /*
1984 * We must characterize the logical->physical translation if it
1985 * has not already been cached.
1986 *
1987 * Physical data references < LBUFSIZE are never cached. This
1988 * includes both small-block allocations and inode-embedded data.
1989 */
1990 if (nbio->bio_offset == NOOFFSET) {
db71f61f 1991 parent = &ip->chain;
01eabad4 1992 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
c667909f 1993
8cce658d 1994 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase,
01eabad4 1995 HAMMER2_LOOKUP_NODATA);
3ac6a319
MD
1996 if (chain == NULL) {
1997 /*
1998 * Data is zero-fill
1999 */
2000 nbio->bio_offset = ZFOFFSET;
3ac6a319
MD
2001 } else if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
2002 /*
8cce658d 2003 * Data is embedded in the inode (do nothing)
3ac6a319 2004 */
3ac6a319 2005 KKASSERT(chain == parent);
01eabad4 2006 hammer2_chain_unlock(hmp, chain);
866d5273
MD
2007 } else if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
2008 /*
2009 * Data is on-media
866d5273 2010 */
8cce658d
MD
2011 KKASSERT(bp->b_bcount == chain->bytes);
2012 nbio->bio_offset = chain->bref.data_off &
2013 HAMMER2_OFF_MASK;
01eabad4 2014 hammer2_chain_unlock(hmp, chain);
8cce658d 2015 KKASSERT(nbio->bio_offset != 0);
db71f61f 2016 } else {
3ac6a319 2017 panic("hammer2_strategy_read: unknown bref type");
db71f61f 2018 }
01eabad4 2019 hammer2_chain_unlock(hmp, parent);
db71f61f 2020 }
866d5273 2021
8e12e3c9
MD
2022 if (hammer2_debug & 0x0020) {
2023 kprintf("read %016jx %016jx\n",
2024 bio->bio_offset, nbio->bio_offset);
2025 }
2026
866d5273 2027 if (nbio->bio_offset == ZFOFFSET) {
3ac6a319 2028 /*
866d5273 2029 * Data is zero-fill
3ac6a319
MD
2030 */
2031 bp->b_resid = 0;
2032 bp->b_error = 0;
8cce658d 2033 bzero(bp->b_data, bp->b_bcount);
3ac6a319 2034 biodone(nbio);
866d5273 2035 } else if (nbio->bio_offset != NOOFFSET) {
3ac6a319 2036 /*
8cce658d 2037 * Forward direct IO to the device
3ac6a319 2038 */
866d5273 2039 vn_strategy(hmp->devvp, nbio);
8cce658d 2040 } else {
866d5273 2041 /*
8cce658d 2042 * Data is embedded in inode.
866d5273 2043 */
8cce658d
MD
2044 bcopy(chain->data->ipdata.u.data, bp->b_data,
2045 HAMMER2_EMBEDDED_BYTES);
2046 bzero(bp->b_data + HAMMER2_EMBEDDED_BYTES,
2047 bp->b_bcount - HAMMER2_EMBEDDED_BYTES);
db71f61f
MD
2048 bp->b_resid = 0;
2049 bp->b_error = 0;
db71f61f 2050 biodone(nbio);
db71f61f
MD
2051 }
2052 return (0);
2053}
2054
2055static
2056int
2057hammer2_strategy_write(struct vop_strategy_args *ap)
2058{
2059 struct buf *bp;
2060 struct bio *bio;
2061 struct bio *nbio;
2062 hammer2_mount_t *hmp;
2063 hammer2_inode_t *ip;
db71f61f
MD
2064
2065 bio = ap->a_bio;
2066 bp = bio->bio_buf;
2067 ip = VTOI(ap->a_vp);
2068 hmp = ip->hmp;
2069 nbio = push_bio(bio);
2070
8cce658d
MD
2071 KKASSERT((bio->bio_offset & HAMMER2_PBUFMASK64) == 0);
2072 KKASSERT(nbio->bio_offset != 0 && nbio->bio_offset != ZFOFFSET);
db71f61f 2073
8cce658d 2074 if (nbio->bio_offset == NOOFFSET) {
3ac6a319 2075 /*
8cce658d 2076 * Must be embedded in the inode.
3ac6a319 2077 */
8cce658d
MD
2078 KKASSERT(bio->bio_offset == 0);
2079 bcopy(bp->b_data, ip->ip_data.u.data, HAMMER2_EMBEDDED_BYTES);
2080 bp->b_resid = 0;
2081 bp->b_error = 0;
2082 biodone(nbio);
214f4a77
MD
2083
2084 /*
2910a90c 2085 * This special flag does not follow the normal MODIFY rules
214f4a77
MD
2086 * because we might deadlock on ip. Instead we depend on
2087 * VOP_FSYNC() to detect the case.
2088 */
2089 atomic_set_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
8cce658d 2090 } else {
3ac6a319 2091 /*
8cce658d 2092 * Forward direct IO to the device
3ac6a319 2093 */
8cce658d 2094 vn_strategy(hmp->devvp, nbio);
a92f82c4 2095 }
db71f61f
MD
2096 return (0);
2097}
2098
2910a90c
MD
2099/*
2100 * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2101 */
2102static
2103int
2104hammer2_vop_ioctl(struct vop_ioctl_args *ap)
2105{
2106 hammer2_mount_t *hmp;
2107 hammer2_inode_t *ip;
2108 int error;
2109
2110 ip = VTOI(ap->a_vp);
2111 hmp = ip->hmp;
2112
2113 error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data,
2114 ap->a_fflag, ap->a_cred);
2115 return (error);
2116}
2117
db71f61f 2118static
f0206a67 2119int
e118c14f 2120hammer2_vop_mountctl(struct vop_mountctl_args *ap)
f0206a67
VS
2121{
2122 struct mount *mp;
2123 struct hammer2_mount *hmp;
2124 int rc;
2125
2126 switch (ap->a_op) {
2127 case (MOUNTCTL_SET_EXPORT):
2128 mp = ap->a_head.a_ops->head.vv_mount;
2129 hmp = MPTOH2(mp);
2130
2131 if (ap->a_ctllen != sizeof(struct export_args))
2132 rc = (EINVAL);
2133 else
10c5dee0
MD
2134 rc = vfs_export(mp, &hmp->export,
2135 (const struct export_args *)ap->a_ctl);
f0206a67
VS
2136 break;
2137 default:
2138 rc = vop_stdmountctl(ap);
2139 break;
2140 }
2141 return (rc);
2142}
2143
703720e4
MD
2144struct vop_ops hammer2_vnode_vops = {
2145 .vop_default = vop_defaultop,
e118c14f 2146 .vop_fsync = hammer2_vop_fsync,
703720e4
MD
2147 .vop_getpages = vop_stdgetpages,
2148 .vop_putpages = vop_stdputpages,
e118c14f 2149 .vop_access = hammer2_vop_access,
37aa19df 2150 .vop_advlock = hammer2_vop_advlock,
c667909f 2151 .vop_close = hammer2_vop_close,
db0c2eb3 2152 .vop_nlink = hammer2_vop_nlink,
c667909f 2153 .vop_ncreate = hammer2_vop_ncreate,
4e2004ea
MD
2154 .vop_nsymlink = hammer2_vop_nsymlink,
2155 .vop_nremove = hammer2_vop_nremove,
2156 .vop_nrmdir = hammer2_vop_nrmdir,
2157 .vop_nrename = hammer2_vop_nrename,
e118c14f 2158 .vop_getattr = hammer2_vop_getattr,
3ac6a319 2159 .vop_setattr = hammer2_vop_setattr,
e118c14f 2160 .vop_readdir = hammer2_vop_readdir,
4e2004ea 2161 .vop_readlink = hammer2_vop_readlink,
5b4a2132
MD
2162 .vop_getpages = vop_stdgetpages,
2163 .vop_putpages = vop_stdputpages,
e118c14f
MD
2164 .vop_read = hammer2_vop_read,
2165 .vop_write = hammer2_vop_write,
2166 .vop_open = hammer2_vop_open,
2167 .vop_inactive = hammer2_vop_inactive,
2168 .vop_reclaim = hammer2_vop_reclaim,
2169 .vop_nresolve = hammer2_vop_nresolve,
37494cab
MD
2170 .vop_nlookupdotdot = hammer2_vop_nlookupdotdot,
2171 .vop_nmkdir = hammer2_vop_nmkdir,
2910a90c 2172 .vop_ioctl = hammer2_vop_ioctl,
e118c14f
MD
2173 .vop_mountctl = hammer2_vop_mountctl,
2174 .vop_bmap = hammer2_vop_bmap,
2175 .vop_strategy = hammer2_vop_strategy,
703720e4
MD
2176};
2177
2178struct vop_ops hammer2_spec_vops = {
2179
2180};
2181
2182struct vop_ops hammer2_fifo_vops = {
2183
2184};