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HAMMER VFS - Limit recursion for long directory chains, update mtime/ctime
[dragonfly.git] / sys / vfs / hammer / hammer_vnops.c
CommitLineData
427e5fc6 1/*
b84de5af 2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
427e5fc6
MD		 3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
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
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
fbb84158 34 * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.102 2008/10/16 17:24:16 dillon Exp $
427e5fc6
MD		 35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/kernel.h>
40#include <sys/fcntl.h>
41#include <sys/namecache.h>
42#include <sys/vnode.h>
43#include <sys/lockf.h>
44#include <sys/event.h>
45#include <sys/stat.h>
b3deaf57 46#include <sys/dirent.h>
fbb84158 47#include <sys/file.h>
c0ade690 48#include <vm/vm_extern.h>
7a04d74f 49#include <vfs/fifofs/fifo.h>
427e5fc6
MD		 50#include "hammer.h"
51
52/*
53 * USERFS VNOPS
54 */
55/*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
66325755
MD		 56static int hammer_vop_fsync(struct vop_fsync_args *);
57static int hammer_vop_read(struct vop_read_args *);
58static int hammer_vop_write(struct vop_write_args *);
59static int hammer_vop_access(struct vop_access_args *);
60static int hammer_vop_advlock(struct vop_advlock_args *);
61static int hammer_vop_close(struct vop_close_args *);
62static int hammer_vop_ncreate(struct vop_ncreate_args *);
63static int hammer_vop_getattr(struct vop_getattr_args *);
64static int hammer_vop_nresolve(struct vop_nresolve_args *);
65static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
66static int hammer_vop_nlink(struct vop_nlink_args *);
67static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
68static int hammer_vop_nmknod(struct vop_nmknod_args *);
69static int hammer_vop_open(struct vop_open_args *);
66325755
MD		 70static int hammer_vop_print(struct vop_print_args *);
71static int hammer_vop_readdir(struct vop_readdir_args *);
72static int hammer_vop_readlink(struct vop_readlink_args *);
73static int hammer_vop_nremove(struct vop_nremove_args *);
74static int hammer_vop_nrename(struct vop_nrename_args *);
75static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
349433c9 76static int hammer_vop_markatime(struct vop_markatime_args *);
66325755
MD		 77static int hammer_vop_setattr(struct vop_setattr_args *);
78static int hammer_vop_strategy(struct vop_strategy_args *);
a99b9ea2 79static int hammer_vop_bmap(struct vop_bmap_args *ap);
66325755
MD		 80static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
81static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
7dc57964 82static int hammer_vop_ioctl(struct vop_ioctl_args *);
513ca7d7 83static int hammer_vop_mountctl(struct vop_mountctl_args *);
fbb84158 84static int hammer_vop_kqfilter (struct vop_kqfilter_args *);
427e5fc6 85
7a04d74f
MD		 86static int hammer_vop_fifoclose (struct vop_close_args *);
87static int hammer_vop_fiforead (struct vop_read_args *);
88static int hammer_vop_fifowrite (struct vop_write_args *);
fbb84158 89static int hammer_vop_fifokqfilter (struct vop_kqfilter_args *);
7a04d74f
MD		 90
91static int hammer_vop_specclose (struct vop_close_args *);
92static int hammer_vop_specread (struct vop_read_args *);
93static int hammer_vop_specwrite (struct vop_write_args *);
94
427e5fc6
MD		 95struct vop_ops hammer_vnode_vops = {
96 .vop_default = vop_defaultop,
97 .vop_fsync = hammer_vop_fsync,
c0ade690
MD		 98 .vop_getpages = vop_stdgetpages,
99 .vop_putpages = vop_stdputpages,
427e5fc6
MD		 100 .vop_read = hammer_vop_read,
101 .vop_write = hammer_vop_write,
102 .vop_access = hammer_vop_access,
103 .vop_advlock = hammer_vop_advlock,
104 .vop_close = hammer_vop_close,
105 .vop_ncreate = hammer_vop_ncreate,
106 .vop_getattr = hammer_vop_getattr,
107 .vop_inactive = hammer_vop_inactive,
108 .vop_reclaim = hammer_vop_reclaim,
109 .vop_nresolve = hammer_vop_nresolve,
110 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
111 .vop_nlink = hammer_vop_nlink,
112 .vop_nmkdir = hammer_vop_nmkdir,
113 .vop_nmknod = hammer_vop_nmknod,
114 .vop_open = hammer_vop_open,
64950f31 115 .vop_pathconf = vop_stdpathconf,
427e5fc6
MD		 116 .vop_print = hammer_vop_print,
117 .vop_readdir = hammer_vop_readdir,
118 .vop_readlink = hammer_vop_readlink,
119 .vop_nremove = hammer_vop_nremove,
120 .vop_nrename = hammer_vop_nrename,
121 .vop_nrmdir = hammer_vop_nrmdir,
349433c9 122 .vop_markatime = hammer_vop_markatime,
427e5fc6 123 .vop_setattr = hammer_vop_setattr,
a99b9ea2 124 .vop_bmap = hammer_vop_bmap,
427e5fc6
MD		 125 .vop_strategy = hammer_vop_strategy,
126 .vop_nsymlink = hammer_vop_nsymlink,
7dc57964 127 .vop_nwhiteout = hammer_vop_nwhiteout,
513ca7d7 128 .vop_ioctl = hammer_vop_ioctl,
fbb84158
MD		 129 .vop_mountctl = hammer_vop_mountctl,
130 .vop_kqfilter = hammer_vop_kqfilter
427e5fc6
MD		 131};
132
7a04d74f
MD		 133struct vop_ops hammer_spec_vops = {
134 .vop_default = spec_vnoperate,
135 .vop_fsync = hammer_vop_fsync,
136 .vop_read = hammer_vop_specread,
137 .vop_write = hammer_vop_specwrite,
138 .vop_access = hammer_vop_access,
139 .vop_close = hammer_vop_specclose,
349433c9 140 .vop_markatime = hammer_vop_markatime,
7a04d74f
MD		 141 .vop_getattr = hammer_vop_getattr,
142 .vop_inactive = hammer_vop_inactive,
143 .vop_reclaim = hammer_vop_reclaim,
144 .vop_setattr = hammer_vop_setattr
145};
146
147struct vop_ops hammer_fifo_vops = {
148 .vop_default = fifo_vnoperate,
149 .vop_fsync = hammer_vop_fsync,
150 .vop_read = hammer_vop_fiforead,
151 .vop_write = hammer_vop_fifowrite,
152 .vop_access = hammer_vop_access,
153 .vop_close = hammer_vop_fifoclose,
349433c9 154 .vop_markatime = hammer_vop_markatime,
7a04d74f
MD		 155 .vop_getattr = hammer_vop_getattr,
156 .vop_inactive = hammer_vop_inactive,
157 .vop_reclaim = hammer_vop_reclaim,
fbb84158
MD		 158 .vop_setattr = hammer_vop_setattr,
159 .vop_kqfilter = hammer_vop_fifokqfilter
7a04d74f
MD		 160};
161
fbb84158
MD		 162static __inline
163void
164hammer_knote(struct vnode *vp, int flags)
165{
166 if (flags)
167 KNOTE(&vp->v_pollinfo.vpi_selinfo.si_note, flags);
168}
169
0832c9bb
MD		 170#ifdef DEBUG_TRUNCATE
171struct hammer_inode *HammerTruncIp;
172#endif
173
b84de5af 174static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
d7e278bb
MD		 175 struct vnode *dvp, struct ucred *cred,
176 int flags, int isdir);
8cd0a023
MD		 177static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
178static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
179
427e5fc6
MD		 180#if 0
181static
182int
183hammer_vop_vnoperate(struct vop_generic_args *)
184{
185 return (VOCALL(&hammer_vnode_vops, ap));
186}
187#endif
188
66325755
MD		 189/*
190 * hammer_vop_fsync { vp, waitfor }
ddfdf542
MD		 191 *
192 * fsync() an inode to disk and wait for it to be completely committed
193 * such that the information would not be undone if a crash occured after
194 * return.
66325755 195 */
427e5fc6
MD		 196static
197int
66325755 198hammer_vop_fsync(struct vop_fsync_args *ap)
427e5fc6 199{
b84de5af 200 hammer_inode_t ip = VTOI(ap->a_vp);
c0ade690 201
7a61b85d 202 ++hammer_count_fsyncs;
e8599db1 203 vfsync(ap->a_vp, ap->a_waitfor, 1, NULL, NULL);
af209b0f 204 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
b424ca30
MD		 205 if (ap->a_waitfor == MNT_WAIT) {
206 vn_unlock(ap->a_vp);
b84de5af 207 hammer_wait_inode(ip);
b424ca30
MD		 208 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
209 }
059819e3 210 return (ip->error);
427e5fc6
MD		 211}
212
66325755
MD		 213/*
214 * hammer_vop_read { vp, uio, ioflag, cred }
215 */
427e5fc6
MD		 216static
217int
66325755 218hammer_vop_read(struct vop_read_args *ap)
427e5fc6 219{
66325755 220 struct hammer_transaction trans;
c0ade690 221 hammer_inode_t ip;
66325755
MD		 222 off_t offset;
223 struct buf *bp;
224 struct uio *uio;
225 int error;
226 int n;
8cd0a023 227 int seqcount;
4a2796f3
MD		 228 int ioseqcount;
229 int blksize;
66325755
MD		 230
231 if (ap->a_vp->v_type != VREG)
232 return (EINVAL);
233 ip = VTOI(ap->a_vp);
234 error = 0;
4a2796f3
MD		 235 uio = ap->a_uio;
236
237 /*
238 * Allow the UIO's size to override the sequential heuristic.
239 */
240 blksize = hammer_blocksize(uio->uio_offset);
241 seqcount = (uio->uio_resid + (blksize - 1)) / blksize;
242 ioseqcount = ap->a_ioflag >> 16;
243 if (seqcount < ioseqcount)
244 seqcount = ioseqcount;
66325755 245
8cd0a023 246 hammer_start_transaction(&trans, ip->hmp);
66325755
MD		 247
248 /*
4a2796f3
MD		 249 * Access the data typically in HAMMER_BUFSIZE blocks via the
250 * buffer cache, but HAMMER may use a variable block size based
251 * on the offset.
66325755 252 */
11ad5ade 253 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
4a2796f3
MD		 254 int64_t base_offset;
255 int64_t file_limit;
256
257 blksize = hammer_blocksize(uio->uio_offset);
258 offset = (int)uio->uio_offset & (blksize - 1);
259 base_offset = uio->uio_offset - offset;
260
1b0ab2c3 261 if (hammer_cluster_enable) {
4a2796f3
MD		 262 /*
263 * Use file_limit to prevent cluster_read() from
264 * creating buffers of the wrong block size past
265 * the demarc.
266 */
267 file_limit = ip->ino_data.size;
268 if (base_offset < HAMMER_XDEMARC &&
269 file_limit > HAMMER_XDEMARC) {
270 file_limit = HAMMER_XDEMARC;
271 }
272 error = cluster_read(ap->a_vp,
273 file_limit, base_offset,
274 blksize, MAXPHYS,
275 seqcount, &bp);
a99b9ea2 276 } else {
4a2796f3 277 error = bread(ap->a_vp, base_offset, blksize, &bp);
a99b9ea2 278 }
66325755 279 if (error) {
4a2796f3 280 kprintf("error %d\n", error);
66325755
MD		 281 brelse(bp);
282 break;
283 }
7bc5b8c2 284
c0ade690 285 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
4a2796f3 286 n = blksize - offset;
66325755
MD		 287 if (n > uio->uio_resid)
288 n = uio->uio_resid;
11ad5ade
MD		 289 if (n > ip->ino_data.size - uio->uio_offset)
290 n = (int)(ip->ino_data.size - uio->uio_offset);
66325755 291 error = uiomove((char *)bp->b_data + offset, n, uio);
7bc5b8c2
MD		 292
293 /* data has a lower priority then meta-data */
294 bp->b_flags |= B_AGE;
66325755 295 bqrelse(bp);
af209b0f
MD		 296 if (error)
297 break;
ce0138a6 298 hammer_stats_file_read += n;
66325755 299 }
b84de5af
MD		 300 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
301 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
bcac4bbb 302 ip->ino_data.atime = trans.time;
ddfdf542 303 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
b84de5af
MD		 304 }
305 hammer_done_transaction(&trans);
66325755 306 return (error);
427e5fc6
MD		 307}
308
66325755
MD		 309/*
310 * hammer_vop_write { vp, uio, ioflag, cred }
311 */
427e5fc6
MD		 312static
313int
66325755 314hammer_vop_write(struct vop_write_args *ap)
427e5fc6 315{
66325755
MD		 316 struct hammer_transaction trans;
317 struct hammer_inode *ip;
4a2796f3 318 hammer_mount_t hmp;
66325755 319 struct uio *uio;
4a2796f3 320 int offset;
47637bff 321 off_t base_offset;
66325755 322 struct buf *bp;
fbb84158 323 int kflags;
66325755
MD		 324 int error;
325 int n;
c0ade690 326 int flags;
4a2796f3 327 int delta;
cb51be26 328 int seqcount;
66325755
MD		 329
330 if (ap->a_vp->v_type != VREG)
331 return (EINVAL);
332 ip = VTOI(ap->a_vp);
4a2796f3 333 hmp = ip->hmp;
66325755 334 error = 0;
fbb84158 335 kflags = 0;
cb51be26 336 seqcount = ap->a_ioflag >> 16;
66325755 337
d113fda1
MD		 338 if (ip->flags & HAMMER_INODE_RO)
339 return (EROFS);
340
66325755
MD		 341 /*
342 * Create a transaction to cover the operations we perform.
343 */
4a2796f3 344 hammer_start_transaction(&trans, hmp);
66325755
MD		 345 uio = ap->a_uio;
346
347 /*
348 * Check append mode
349 */
350 if (ap->a_ioflag & IO_APPEND)
11ad5ade 351 uio->uio_offset = ip->ino_data.size;
66325755
MD		 352
353 /*
af209b0f
MD		 354 * Check for illegal write offsets. Valid range is 0...2^63-1.
355 *
356 * NOTE: the base_off assignment is required to work around what
357 * I consider to be a GCC-4 optimization bug.
66325755 358 */
af209b0f
MD		 359 if (uio->uio_offset < 0) {
360 hammer_done_transaction(&trans);
361 return (EFBIG);
362 }
363 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
364 if (uio->uio_resid > 0 && base_offset <= 0) {
b84de5af 365 hammer_done_transaction(&trans);
66325755 366 return (EFBIG);
9c448776 367 }
66325755
MD		 368
369 /*
4a2796f3
MD		 370 * Access the data typically in HAMMER_BUFSIZE blocks via the
371 * buffer cache, but HAMMER may use a variable block size based
372 * on the offset.
66325755
MD		 373 */
374 while (uio->uio_resid > 0) {
d5ef456e 375 int fixsize = 0;
4a2796f3
MD		 376 int blksize;
377 int blkmask;
d5ef456e 378
93291532 379 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
e63644f0
MD		 380 break;
381
a9d52b76
MD		 382 blksize = hammer_blocksize(uio->uio_offset);
383
059819e3 384 /*
4a2796f3
MD		 385 * Do not allow HAMMER to blow out the buffer cache. Very
386 * large UIOs can lockout other processes due to bwillwrite()
387 * mechanics.
47637bff 388 *
df301614
MD		 389 * The hammer inode is not locked during these operations.
390 * The vnode is locked which can interfere with the pageout
391 * daemon for non-UIO_NOCOPY writes but should not interfere
392 * with the buffer cache. Even so, we cannot afford to
393 * allow the pageout daemon to build up too many dirty buffer
394 * cache buffers.
cb63d1bc
MD		 395 *
396 * Only call this if we aren't being recursively called from
397 * a virtual disk device (vn), else we may deadlock.
df301614 398 */
cb63d1bc
MD		 399 if ((ap->a_ioflag & IO_RECURSE) == 0)
400 bwillwrite(blksize);
df301614
MD		 401
402 /*
e4a5ff06
MD		 403 * Do not allow HAMMER to blow out system memory by
404 * accumulating too many records. Records are so well
405 * decoupled from the buffer cache that it is possible
406 * for userland to push data out to the media via
407 * direct-write, but build up the records queued to the
408 * backend faster then the backend can flush them out.
409 * HAMMER has hit its write limit but the frontend has
410 * no pushback to slow it down.
059819e3 411 */
df301614 412 if (hmp->rsv_recs > hammer_limit_recs / 2) {
4a2796f3 413 /*
df301614 414 * Get the inode on the flush list
4a2796f3 415 */
df301614
MD		 416 if (ip->rsv_recs >= 64)
417 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
418 else if (ip->rsv_recs >= 16)
419 hammer_flush_inode(ip, 0);
4a2796f3
MD		 420
421 /*
df301614
MD		 422 * Keep the flusher going if the system keeps
423 * queueing records.
4a2796f3 424 */
df301614
MD		 425 delta = hmp->count_newrecords -
426 hmp->last_newrecords;
427 if (delta < 0 || delta > hammer_limit_recs / 2) {
428 hmp->last_newrecords = hmp->count_newrecords;
429 hammer_sync_hmp(hmp, MNT_NOWAIT);
4a2796f3
MD		 430 }
431
df301614
MD		 432 /*
433 * If we have gotten behind start slowing
434 * down the writers.
435 */
436 delta = (hmp->rsv_recs - hammer_limit_recs) *
437 hz / hammer_limit_recs;
438 if (delta > 0)
439 tsleep(&trans, 0, "hmrslo", delta);
059819e3
MD		 440 }
441
4a2796f3
MD		 442 /*
443 * Calculate the blocksize at the current offset and figure
444 * out how much we can actually write.
445 */
4a2796f3
MD		 446 blkmask = blksize - 1;
447 offset = (int)uio->uio_offset & blkmask;
448 base_offset = uio->uio_offset & ~(int64_t)blkmask;
449 n = blksize - offset;
d5ef456e
MD		 450 if (n > uio->uio_resid)
451 n = uio->uio_resid;
11ad5ade 452 if (uio->uio_offset + n > ip->ino_data.size) {
d5ef456e
MD		 453 vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
454 fixsize = 1;
fbb84158 455 kflags |= NOTE_EXTEND;
d5ef456e
MD		 456 }
457
c0ade690
MD		 458 if (uio->uio_segflg == UIO_NOCOPY) {
459 /*
460 * Issuing a write with the same data backing the
461 * buffer. Instantiate the buffer to collect the
462 * backing vm pages, then read-in any missing bits.
463 *
464 * This case is used by vop_stdputpages().
465 */
47637bff 466 bp = getblk(ap->a_vp, base_offset,
4a2796f3 467 blksize, GETBLK_BHEAVY, 0);
c0ade690
MD		 468 if ((bp->b_flags & B_CACHE) == 0) {
469 bqrelse(bp);
47637bff 470 error = bread(ap->a_vp, base_offset,
4a2796f3 471 blksize, &bp);
c0ade690 472 }
4a2796f3 473 } else if (offset == 0 && uio->uio_resid >= blksize) {
c0ade690 474 /*
a5fddc16
MD		 475 * Even though we are entirely overwriting the buffer
476 * we may still have to zero it out to avoid a
477 * mmap/write visibility issue.
c0ade690 478 */
4a2796f3 479 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
a5fddc16
MD		 480 if ((bp->b_flags & B_CACHE) == 0)
481 vfs_bio_clrbuf(bp);
47637bff 482 } else if (base_offset >= ip->ino_data.size) {
c0ade690 483 /*
a5fddc16
MD		 484 * If the base offset of the buffer is beyond the
485 * file EOF, we don't have to issue a read.
c0ade690 486 */
47637bff 487 bp = getblk(ap->a_vp, base_offset,
4a2796f3 488 blksize, GETBLK_BHEAVY, 0);
66325755
MD		 489 vfs_bio_clrbuf(bp);
490 } else {
c0ade690
MD		 491 /*
492 * Partial overwrite, read in any missing bits then
493 * replace the portion being written.
494 */
4a2796f3 495 error = bread(ap->a_vp, base_offset, blksize, &bp);
d5ef456e
MD		 496 if (error == 0)
497 bheavy(bp);
66325755 498 }
47637bff 499 if (error == 0) {
4a2796f3 500 error = uiomove((char *)bp->b_data + offset,
47637bff
MD		 501 n, uio);
502 }
d5ef456e
MD		 503
504 /*
505 * If we screwed up we have to undo any VM size changes we
506 * made.
507 */
66325755
MD		 508 if (error) {
509 brelse(bp);
d5ef456e 510 if (fixsize) {
11ad5ade 511 vtruncbuf(ap->a_vp, ip->ino_data.size,
4a2796f3 512 hammer_blocksize(ip->ino_data.size));
d5ef456e 513 }
66325755
MD		 514 break;
515 }
fbb84158 516 kflags |= NOTE_WRITE;
ce0138a6 517 hammer_stats_file_write += n;
c0ade690 518 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
11ad5ade
MD		 519 if (ip->ino_data.size < uio->uio_offset) {
520 ip->ino_data.size = uio->uio_offset;
521 flags = HAMMER_INODE_DDIRTY;
522 vnode_pager_setsize(ap->a_vp, ip->ino_data.size);
c0ade690 523 } else {
d113fda1 524 flags = 0;
66325755 525 }
11ad5ade 526 ip->ino_data.mtime = trans.time;
ddfdf542 527 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
47637bff 528 hammer_modify_inode(ip, flags);
32c90105 529
0832c9bb 530 /*
1b0ab2c3
MD		 531 * Once we dirty the buffer any cached zone-X offset
532 * becomes invalid. HAMMER NOTE: no-history mode cannot
533 * allow overwriting over the same data sector unless
534 * we provide UNDOs for the old data, which we don't.
535 */
536 bp->b_bio2.bio_offset = NOOFFSET;
537
538 /*
47637bff
MD		 539 * Final buffer disposition.
540 */
cb51be26 541 bp->b_flags |= B_AGE;
66325755
MD		 542 if (ap->a_ioflag & IO_SYNC) {
543 bwrite(bp);
544 } else if (ap->a_ioflag & IO_DIRECT) {
66325755 545 bawrite(bp);
4a2796f3
MD		 546 } else {
547 bdwrite(bp);
548 }
66325755 549 }
b84de5af 550 hammer_done_transaction(&trans);
fbb84158 551 hammer_knote(ap->a_vp, kflags);
66325755 552 return (error);
427e5fc6
MD		 553}
554
66325755
MD		 555/*
556 * hammer_vop_access { vp, mode, cred }
557 */
427e5fc6
MD		 558static
559int
66325755 560hammer_vop_access(struct vop_access_args *ap)
427e5fc6 561{
66325755
MD		 562 struct hammer_inode *ip = VTOI(ap->a_vp);
563 uid_t uid;
564 gid_t gid;
565 int error;
566
ce0138a6 567 ++hammer_stats_file_iopsr;
66325755
MD		 568 uid = hammer_to_unix_xid(&ip->ino_data.uid);
569 gid = hammer_to_unix_xid(&ip->ino_data.gid);
570
571 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
572 ip->ino_data.uflags);
573 return (error);
427e5fc6
MD		 574}
575
66325755
MD		 576/*
577 * hammer_vop_advlock { vp, id, op, fl, flags }
578 */
427e5fc6
MD		 579static
580int
66325755 581hammer_vop_advlock(struct vop_advlock_args *ap)
427e5fc6 582{
4a2796f3 583 hammer_inode_t ip = VTOI(ap->a_vp);
66325755 584
11ad5ade 585 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
427e5fc6
MD		 586}
587
66325755
MD		 588/*
589 * hammer_vop_close { vp, fflag }
590 */
427e5fc6
MD		 591static
592int
66325755 593hammer_vop_close(struct vop_close_args *ap)
427e5fc6 594{
21fde338 595 /*hammer_inode_t ip = VTOI(ap->a_vp);*/
a89aec1b 596 return (vop_stdclose(ap));
427e5fc6
MD		 597}
598
66325755
MD		 599/*
600 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
601 *
602 * The operating system has already ensured that the directory entry
603 * does not exist and done all appropriate namespace locking.
604 */
427e5fc6
MD		 605static
606int
66325755 607hammer_vop_ncreate(struct vop_ncreate_args *ap)
427e5fc6 608{
66325755
MD		 609 struct hammer_transaction trans;
610 struct hammer_inode *dip;
611 struct hammer_inode *nip;
612 struct nchandle *nch;
613 int error;
614
615 nch = ap->a_nch;
616 dip = VTOI(ap->a_dvp);
617
d113fda1
MD		 618 if (dip->flags & HAMMER_INODE_RO)
619 return (EROFS);
93291532 620 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 621 return (error);
d113fda1 622
66325755
MD		 623 /*
624 * Create a transaction to cover the operations we perform.
625 */
8cd0a023 626 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 627 ++hammer_stats_file_iopsw;
66325755
MD		 628
629 /*
630 * Create a new filesystem object of the requested type. The
b84de5af
MD		 631 * returned inode will be referenced and shared-locked to prevent
632 * it from being moved to the flusher.
66325755 633 */
8cd0a023 634
5a930e66 635 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
ea434b6f 636 dip, NULL, &nip);
66325755 637 if (error) {
77062c8a 638 hkprintf("hammer_create_inode error %d\n", error);
b84de5af 639 hammer_done_transaction(&trans);
66325755
MD		 640 *ap->a_vpp = NULL;
641 return (error);
642 }
66325755
MD		 643
644 /*
645 * Add the new filesystem object to the directory. This will also
646 * bump the inode's link count.
647 */
5a930e66
MD		 648 error = hammer_ip_add_directory(&trans, dip,
649 nch->ncp->nc_name, nch->ncp->nc_nlen,
650 nip);
0b075555 651 if (error)
77062c8a 652 hkprintf("hammer_ip_add_directory error %d\n", error);
66325755
MD		 653
654 /*
655 * Finish up.
656 */
657 if (error) {
a89aec1b 658 hammer_rel_inode(nip, 0);
b84de5af 659 hammer_done_transaction(&trans);
66325755
MD		 660 *ap->a_vpp = NULL;
661 } else {
e8599db1 662 error = hammer_get_vnode(nip, ap->a_vpp);
b84de5af 663 hammer_done_transaction(&trans);
a89aec1b
MD		 664 hammer_rel_inode(nip, 0);
665 if (error == 0) {
666 cache_setunresolved(ap->a_nch);
667 cache_setvp(ap->a_nch, *ap->a_vpp);
668 }
fbb84158 669 hammer_knote(ap->a_dvp, NOTE_WRITE);
66325755
MD		 670 }
671 return (error);
427e5fc6
MD		 672}
673
66325755
MD		 674/*
675 * hammer_vop_getattr { vp, vap }
98f7132d
MD		 676 *
677 * Retrieve an inode's attribute information. When accessing inodes
678 * historically we fake the atime field to ensure consistent results.
679 * The atime field is stored in the B-Tree element and allowed to be
680 * updated without cycling the element.
66325755 681 */
427e5fc6
MD		 682static
683int
66325755 684hammer_vop_getattr(struct vop_getattr_args *ap)
427e5fc6 685{
66325755
MD		 686 struct hammer_inode *ip = VTOI(ap->a_vp);
687 struct vattr *vap = ap->a_vap;
688
a56cb012
MD		 689 /*
690 * We want the fsid to be different when accessing a filesystem
691 * with different as-of's so programs like diff don't think
692 * the files are the same.
693 *
694 * We also want the fsid to be the same when comparing snapshots,
695 * or when comparing mirrors (which might be backed by different
696 * physical devices). HAMMER fsids are based on the PFS's
697 * shared_uuid field.
698 *
699 * XXX there is a chance of collision here. The va_fsid reported
700 * by stat is different from the more involved fsid used in the
701 * mount structure.
c82af904 702 */
ce0138a6 703 ++hammer_stats_file_iopsr;
a56cb012
MD		 704 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
705 (u_int32_t)(ip->obj_asof >> 32);
706
11ad5ade 707 vap->va_fileid = ip->ino_leaf.base.obj_id;
66325755 708 vap->va_mode = ip->ino_data.mode;
11ad5ade 709 vap->va_nlink = ip->ino_data.nlinks;
66325755
MD		 710 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
711 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
712 vap->va_rmajor = 0;
713 vap->va_rminor = 0;
11ad5ade 714 vap->va_size = ip->ino_data.size;
bcac4bbb
MD		 715
716 /*
f437a2ab
MD		 717 * Special case for @@PFS softlinks. The actual size of the
718 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
cb3c760c 719 * or for MAX_TID is "@@-1:%05d" == 10 bytes.
f437a2ab
MD		 720 */
721 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
722 ip->ino_data.size == 10 &&
723 ip->obj_asof == HAMMER_MAX_TID &&
724 ip->obj_localization == 0 &&
725 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
cb3c760c
MD		 726 if (ip->pfsm->pfsd.mirror_flags & HAMMER_PFSD_SLAVE)
727 vap->va_size = 26;
728 else
729 vap->va_size = 10;
f437a2ab
MD		 730 }
731
732 /*
bcac4bbb
MD		 733 * We must provide a consistent atime and mtime for snapshots
734 * so people can do a 'tar cf - ... | md5' on them and get
735 * consistent results.
736 */
737 if (ip->flags & HAMMER_INODE_RO) {
ddfdf542
MD		 738 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
739 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
bcac4bbb 740 } else {
ddfdf542
MD		 741 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
742 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
bcac4bbb 743 }
ddfdf542 744 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
66325755
MD		 745 vap->va_flags = ip->ino_data.uflags;
746 vap->va_gen = 1; /* hammer inums are unique for all time */
bf686dbe 747 vap->va_blocksize = HAMMER_BUFSIZE;
4a2796f3
MD		 748 if (ip->ino_data.size >= HAMMER_XDEMARC) {
749 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
750 ~HAMMER_XBUFMASK64;
751 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
752 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
753 ~HAMMER_BUFMASK64;
754 } else {
755 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
756 }
64950f31 757
11ad5ade 758 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
66325755 759 vap->va_filerev = 0; /* XXX */
4a2796f3 760 /* mtime uniquely identifies any adjustments made to the file XXX */
11ad5ade 761 vap->va_fsmid = ip->ino_data.mtime;
66325755
MD		 762 vap->va_uid_uuid = ip->ino_data.uid;
763 vap->va_gid_uuid = ip->ino_data.gid;
764 vap->va_fsid_uuid = ip->hmp->fsid;
765 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
766 VA_FSID_UUID_VALID;
7a04d74f 767
11ad5ade 768 switch (ip->ino_data.obj_type) {
7a04d74f
MD		 769 case HAMMER_OBJTYPE_CDEV:
770 case HAMMER_OBJTYPE_BDEV:
771 vap->va_rmajor = ip->ino_data.rmajor;
772 vap->va_rminor = ip->ino_data.rminor;
773 break;
774 default:
775 break;
776 }
66325755 777 return(0);
427e5fc6
MD		 778}
779
66325755
MD		 780/*
781 * hammer_vop_nresolve { nch, dvp, cred }
782 *
783 * Locate the requested directory entry.
784 */
427e5fc6
MD		 785static
786int
66325755 787hammer_vop_nresolve(struct vop_nresolve_args *ap)
427e5fc6 788{
36f82b23 789 struct hammer_transaction trans;
66325755 790 struct namecache *ncp;
7f7c1f84
MD		 791 hammer_inode_t dip;
792 hammer_inode_t ip;
793 hammer_tid_t asof;
8cd0a023 794 struct hammer_cursor cursor;
66325755
MD		 795 struct vnode *vp;
796 int64_t namekey;
797 int error;
7f7c1f84
MD		 798 int i;
799 int nlen;
d113fda1 800 int flags;
a56cb012 801 int ispfs;
adf01747 802 int64_t obj_id;
ddfdf542 803 u_int32_t localization;
5e435c92 804 u_int32_t max_iterations;
7f7c1f84
MD		 805
806 /*
807 * Misc initialization, plus handle as-of name extensions. Look for
808 * the '@@' extension. Note that as-of files and directories cannot
809 * be modified.
7f7c1f84
MD		 810 */
811 dip = VTOI(ap->a_dvp);
812 ncp = ap->a_nch->ncp;
813 asof = dip->obj_asof;
bc6c1f13 814 localization = dip->obj_localization; /* for code consistency */
7f7c1f84 815 nlen = ncp->nc_nlen;
ea434b6f 816 flags = dip->flags & HAMMER_INODE_RO;
a56cb012 817 ispfs = 0;
7f7c1f84 818
36f82b23 819 hammer_simple_transaction(&trans, dip->hmp);
ce0138a6 820 ++hammer_stats_file_iopsr;
36f82b23 821
7f7c1f84
MD		 822 for (i = 0; i < nlen; ++i) {
823 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
bc6c1f13
MD		 824 error = hammer_str_to_tid(ncp->nc_name + i + 2,
825 &ispfs, &asof, &localization);
826 if (error != 0) {
827 i = nlen;
828 break;
829 }
ea434b6f
MD		 830 if (asof != HAMMER_MAX_TID)
831 flags |= HAMMER_INODE_RO;
7f7c1f84
MD		 832 break;
833 }
834 }
835 nlen = i;
66325755 836
8cd0a023 837 /*
ea434b6f
MD		 838 * If this is a PFS softlink we dive into the PFS
839 */
840 if (ispfs && nlen == 0) {
841 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
842 asof, localization,
843 flags, &error);
844 if (error == 0) {
845 error = hammer_get_vnode(ip, &vp);
846 hammer_rel_inode(ip, 0);
847 } else {
848 vp = NULL;
849 }
850 if (error == 0) {
851 vn_unlock(vp);
852 cache_setvp(ap->a_nch, vp);
853 vrele(vp);
854 }
855 goto done;
856 }
857
858 /*
294aec9f
MD		 859 * If there is no path component the time extension is relative to dip.
860 * e.g. "fubar/@@<snapshot>"
861 *
862 * "." is handled by the kernel, but ".@@<snapshot>" is not.
863 * e.g. "fubar/.@@<snapshot>"
864 *
865 * ".." is handled by the kernel. We do not currently handle
866 * "..@<snapshot>".
d113fda1 867 */
294aec9f 868 if (nlen == 0 || (nlen == 1 && ncp->nc_name[0] == '.')) {
bcac4bbb 869 ip = hammer_get_inode(&trans, dip, dip->obj_id,
ddfdf542
MD		 870 asof, dip->obj_localization,
871 flags, &error);
d113fda1 872 if (error == 0) {
e8599db1 873 error = hammer_get_vnode(ip, &vp);
d113fda1
MD		 874 hammer_rel_inode(ip, 0);
875 } else {
876 vp = NULL;
877 }
878 if (error == 0) {
879 vn_unlock(vp);
880 cache_setvp(ap->a_nch, vp);
881 vrele(vp);
882 }
36f82b23 883 goto done;
d113fda1
MD		 884 }
885
886 /*
8cd0a023
MD		 887 * Calculate the namekey and setup the key range for the scan. This
888 * works kinda like a chained hash table where the lower 32 bits
889 * of the namekey synthesize the chain.
890 *
891 * The key range is inclusive of both key_beg and key_end.
892 */
5e435c92
MD		 893 namekey = hammer_directory_namekey(dip, ncp->nc_name, nlen,
894 &max_iterations);
66325755 895
bcac4bbb 896 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
5a930e66
MD		 897 cursor.key_beg.localization = dip->obj_localization +
898 HAMMER_LOCALIZE_MISC;
8cd0a023
MD		 899 cursor.key_beg.obj_id = dip->obj_id;
900 cursor.key_beg.key = namekey;
d5530d22 901 cursor.key_beg.create_tid = 0;
8cd0a023
MD		 902 cursor.key_beg.delete_tid = 0;
903 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
904 cursor.key_beg.obj_type = 0;
66325755 905
8cd0a023 906 cursor.key_end = cursor.key_beg;
5e435c92 907 cursor.key_end.key += max_iterations;
d5530d22
MD		 908 cursor.asof = asof;
909 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
66325755
MD		 910
911 /*
8cd0a023 912 * Scan all matching records (the chain), locate the one matching
a89aec1b 913 * the requested path component.
8cd0a023
MD		 914 *
915 * The hammer_ip_*() functions merge in-memory records with on-disk
916 * records for the purposes of the search.
66325755 917 */
6a37e7e4 918 obj_id = 0;
43c665ae 919 localization = HAMMER_DEF_LOCALIZATION;
6a37e7e4 920
4e17f465 921 if (error == 0) {
4e17f465
MD		 922 error = hammer_ip_first(&cursor);
923 while (error == 0) {
924 error = hammer_ip_resolve_data(&cursor);
925 if (error)
926 break;
11ad5ade
MD		 927 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
928 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
929 obj_id = cursor.data->entry.obj_id;
ddfdf542 930 localization = cursor.data->entry.localization;
4e17f465
MD		 931 break;
932 }
933 error = hammer_ip_next(&cursor);
66325755
MD		 934 }
935 }
6a37e7e4 936 hammer_done_cursor(&cursor);
4c286c36
MD		 937
938 /*
939 * Lookup the obj_id. This should always succeed. If it does not
940 * the filesystem may be damaged and we return a dummy inode.
941 */
66325755 942 if (error == 0) {
bcac4bbb 943 ip = hammer_get_inode(&trans, dip, obj_id,
ddfdf542
MD		 944 asof, localization,
945 flags, &error);
4c286c36
MD		 946 if (error == ENOENT) {
947 kprintf("HAMMER: WARNING: Missing "
948 "inode for dirent \"%s\"\n"
949 "\tobj_id = %016llx\n",
950 ncp->nc_name, (long long)obj_id);
951 error = 0;
952 ip = hammer_get_dummy_inode(&trans, dip, obj_id,
953 asof, localization,
954 flags, &error);
955 }
7f7c1f84 956 if (error == 0) {
e8599db1 957 error = hammer_get_vnode(ip, &vp);
7f7c1f84
MD		 958 hammer_rel_inode(ip, 0);
959 } else {
960 vp = NULL;
961 }
66325755
MD		 962 if (error == 0) {
963 vn_unlock(vp);
964 cache_setvp(ap->a_nch, vp);
965 vrele(vp);
966 }
967 } else if (error == ENOENT) {
968 cache_setvp(ap->a_nch, NULL);
969 }
36f82b23 970done:
b84de5af 971 hammer_done_transaction(&trans);
66325755 972 return (error);
427e5fc6
MD		 973}
974
66325755
MD		 975/*
976 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
977 *
978 * Locate the parent directory of a directory vnode.
979 *
980 * dvp is referenced but not locked. *vpp must be returned referenced and
981 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
982 * at the root, instead it could indicate that the directory we were in was
983 * removed.
42c7d26b
MD		 984 *
985 * NOTE: as-of sequences are not linked into the directory structure. If
986 * we are at the root with a different asof then the mount point, reload
987 * the same directory with the mount point's asof. I'm not sure what this
988 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
989 * get confused, but it hasn't been tested.
66325755 990 */
427e5fc6
MD		 991static
992int
66325755 993hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
427e5fc6 994{
36f82b23 995 struct hammer_transaction trans;
66325755 996 struct hammer_inode *dip;
d113fda1 997 struct hammer_inode *ip;
42c7d26b 998 int64_t parent_obj_id;
5a930e66 999 u_int32_t parent_obj_localization;
42c7d26b 1000 hammer_tid_t asof;
d113fda1 1001 int error;
66325755
MD		 1002
1003 dip = VTOI(ap->a_dvp);
42c7d26b 1004 asof = dip->obj_asof;
5a930e66
MD		 1005
1006 /*
1007 * Whos are parent? This could be the root of a pseudo-filesystem
1008 * whos parent is in another localization domain.
1009 */
42c7d26b 1010 parent_obj_id = dip->ino_data.parent_obj_id;
5a930e66
MD		 1011 if (dip->obj_id == HAMMER_OBJID_ROOT)
1012 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
1013 else
1014 parent_obj_localization = dip->obj_localization;
42c7d26b
MD		 1015
1016 if (parent_obj_id == 0) {
1017 if (dip->obj_id == HAMMER_OBJID_ROOT &&
1018 asof != dip->hmp->asof) {
1019 parent_obj_id = dip->obj_id;
1020 asof = dip->hmp->asof;
1021 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
1022 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
1023 dip->obj_asof);
1024 } else {
1025 *ap->a_vpp = NULL;
1026 return ENOENT;
1027 }
66325755 1028 }
d113fda1 1029
36f82b23 1030 hammer_simple_transaction(&trans, dip->hmp);
ce0138a6 1031 ++hammer_stats_file_iopsr;
36f82b23 1032
bcac4bbb 1033 ip = hammer_get_inode(&trans, dip, parent_obj_id,
5a930e66 1034 asof, parent_obj_localization,
ddfdf542 1035 dip->flags, &error);
36f82b23 1036 if (ip) {
e8599db1 1037 error = hammer_get_vnode(ip, ap->a_vpp);
36f82b23
MD		 1038 hammer_rel_inode(ip, 0);
1039 } else {
d113fda1 1040 *ap->a_vpp = NULL;
d113fda1 1041 }
b84de5af 1042 hammer_done_transaction(&trans);
d113fda1 1043 return (error);
427e5fc6
MD		 1044}
1045
66325755
MD		 1046/*
1047 * hammer_vop_nlink { nch, dvp, vp, cred }
1048 */
427e5fc6
MD		 1049static
1050int
66325755 1051hammer_vop_nlink(struct vop_nlink_args *ap)
427e5fc6 1052{
66325755
MD		 1053 struct hammer_transaction trans;
1054 struct hammer_inode *dip;
1055 struct hammer_inode *ip;
1056 struct nchandle *nch;
1057 int error;
1058
f437a2ab
MD		 1059 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1060 return(EXDEV);
1061
66325755
MD		 1062 nch = ap->a_nch;
1063 dip = VTOI(ap->a_dvp);
1064 ip = VTOI(ap->a_vp);
1065
f437a2ab
MD		 1066 if (dip->obj_localization != ip->obj_localization)
1067 return(EXDEV);
1068
d113fda1
MD		 1069 if (dip->flags & HAMMER_INODE_RO)
1070 return (EROFS);
1071 if (ip->flags & HAMMER_INODE_RO)
1072 return (EROFS);
93291532 1073 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1074 return (error);
d113fda1 1075
66325755
MD		 1076 /*
1077 * Create a transaction to cover the operations we perform.
1078 */
8cd0a023 1079 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 1080 ++hammer_stats_file_iopsw;
66325755
MD		 1081
1082 /*
1083 * Add the filesystem object to the directory. Note that neither
1084 * dip nor ip are referenced or locked, but their vnodes are
1085 * referenced. This function will bump the inode's link count.
1086 */
5a930e66
MD		 1087 error = hammer_ip_add_directory(&trans, dip,
1088 nch->ncp->nc_name, nch->ncp->nc_nlen,
1089 ip);
66325755
MD		 1090
1091 /*
1092 * Finish up.
1093 */
b84de5af 1094 if (error == 0) {
6b4f890b
MD		 1095 cache_setunresolved(nch);
1096 cache_setvp(nch, ap->a_vp);
66325755 1097 }
b84de5af 1098 hammer_done_transaction(&trans);
fbb84158
MD		 1099 hammer_knote(ap->a_vp, NOTE_LINK);
1100 hammer_knote(ap->a_dvp, NOTE_WRITE);
66325755 1101 return (error);
427e5fc6
MD		 1102}
1103
66325755
MD		 1104/*
1105 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1106 *
1107 * The operating system has already ensured that the directory entry
1108 * does not exist and done all appropriate namespace locking.
1109 */
427e5fc6
MD		 1110static
1111int
66325755 1112hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
427e5fc6 1113{
66325755
MD		 1114 struct hammer_transaction trans;
1115 struct hammer_inode *dip;
1116 struct hammer_inode *nip;
1117 struct nchandle *nch;
1118 int error;
1119
1120 nch = ap->a_nch;
1121 dip = VTOI(ap->a_dvp);
1122
d113fda1
MD		 1123 if (dip->flags & HAMMER_INODE_RO)
1124 return (EROFS);
93291532 1125 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1126 return (error);
d113fda1 1127
66325755
MD		 1128 /*
1129 * Create a transaction to cover the operations we perform.
1130 */
8cd0a023 1131 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 1132 ++hammer_stats_file_iopsw;
66325755
MD		 1133
1134 /*
1135 * Create a new filesystem object of the requested type. The
8cd0a023 1136 * returned inode will be referenced but not locked.
66325755 1137 */
5a930e66 1138 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
ea434b6f 1139 dip, NULL, &nip);
66325755 1140 if (error) {
77062c8a 1141 hkprintf("hammer_mkdir error %d\n", error);
b84de5af 1142 hammer_done_transaction(&trans);
66325755
MD		 1143 *ap->a_vpp = NULL;
1144 return (error);
1145 }
66325755
MD		 1146 /*
1147 * Add the new filesystem object to the directory. This will also
1148 * bump the inode's link count.
1149 */
5a930e66
MD		 1150 error = hammer_ip_add_directory(&trans, dip,
1151 nch->ncp->nc_name, nch->ncp->nc_nlen,
1152 nip);
0b075555 1153 if (error)
77062c8a 1154 hkprintf("hammer_mkdir (add) error %d\n", error);
66325755
MD		 1155
1156 /*
1157 * Finish up.
1158 */
1159 if (error) {
a89aec1b 1160 hammer_rel_inode(nip, 0);
66325755
MD		 1161 *ap->a_vpp = NULL;
1162 } else {
e8599db1 1163 error = hammer_get_vnode(nip, ap->a_vpp);
a89aec1b
MD		 1164 hammer_rel_inode(nip, 0);
1165 if (error == 0) {
1166 cache_setunresolved(ap->a_nch);
1167 cache_setvp(ap->a_nch, *ap->a_vpp);
1168 }
66325755 1169 }
b84de5af 1170 hammer_done_transaction(&trans);
fbb84158
MD		 1171 if (error == 0)
1172 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
66325755 1173 return (error);
427e5fc6
MD		 1174}
1175
66325755
MD		 1176/*
1177 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1178 *
1179 * The operating system has already ensured that the directory entry
1180 * does not exist and done all appropriate namespace locking.
1181 */
427e5fc6
MD		 1182static
1183int
66325755 1184hammer_vop_nmknod(struct vop_nmknod_args *ap)
427e5fc6 1185{
66325755
MD		 1186 struct hammer_transaction trans;
1187 struct hammer_inode *dip;
1188 struct hammer_inode *nip;
1189 struct nchandle *nch;
1190 int error;
1191
1192 nch = ap->a_nch;
1193 dip = VTOI(ap->a_dvp);
1194
d113fda1
MD		 1195 if (dip->flags & HAMMER_INODE_RO)
1196 return (EROFS);
93291532 1197 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1198 return (error);
d113fda1 1199
66325755
MD		 1200 /*
1201 * Create a transaction to cover the operations we perform.
1202 */
8cd0a023 1203 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 1204 ++hammer_stats_file_iopsw;
66325755
MD		 1205
1206 /*
1207 * Create a new filesystem object of the requested type. The
8cd0a023 1208 * returned inode will be referenced but not locked.
5a930e66
MD		 1209 *
1210 * If mknod specifies a directory a pseudo-fs is created.
66325755 1211 */
5a930e66 1212 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
ea434b6f 1213 dip, NULL, &nip);
66325755 1214 if (error) {
b84de5af 1215 hammer_done_transaction(&trans);
66325755
MD		 1216 *ap->a_vpp = NULL;
1217 return (error);
1218 }
66325755
MD		 1219
1220 /*
1221 * Add the new filesystem object to the directory. This will also
1222 * bump the inode's link count.
1223 */
5a930e66
MD		 1224 error = hammer_ip_add_directory(&trans, dip,
1225 nch->ncp->nc_name, nch->ncp->nc_nlen,
1226 nip);
66325755
MD		 1227
1228 /*
1229 * Finish up.
1230 */
1231 if (error) {
a89aec1b 1232 hammer_rel_inode(nip, 0);
66325755
MD		 1233 *ap->a_vpp = NULL;
1234 } else {
e8599db1 1235 error = hammer_get_vnode(nip, ap->a_vpp);
a89aec1b
MD		 1236 hammer_rel_inode(nip, 0);
1237 if (error == 0) {
1238 cache_setunresolved(ap->a_nch);
1239 cache_setvp(ap->a_nch, *ap->a_vpp);
1240 }
66325755 1241 }
b84de5af 1242 hammer_done_transaction(&trans);
fbb84158
MD		 1243 if (error == 0)
1244 hammer_knote(ap->a_dvp, NOTE_WRITE);
66325755 1245 return (error);
427e5fc6
MD		 1246}
1247
66325755
MD		 1248/*
1249 * hammer_vop_open { vp, mode, cred, fp }
1250 */
427e5fc6
MD		 1251static
1252int
66325755 1253hammer_vop_open(struct vop_open_args *ap)
427e5fc6 1254{
9f5097dc
MD		 1255 hammer_inode_t ip;
1256
ce0138a6 1257 ++hammer_stats_file_iopsr;
9f5097dc
MD		 1258 ip = VTOI(ap->a_vp);
1259
1260 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
d113fda1 1261 return (EROFS);
a89aec1b 1262 return(vop_stdopen(ap));
427e5fc6
MD		 1263}
1264
66325755 1265/*
66325755
MD		 1266 * hammer_vop_print { vp }
1267 */
427e5fc6
MD		 1268static
1269int
66325755 1270hammer_vop_print(struct vop_print_args *ap)
427e5fc6
MD		 1271{
1272 return EOPNOTSUPP;
1273}
1274
66325755 1275/*
6b4f890b 1276 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
66325755 1277 */
427e5fc6
MD		 1278static
1279int
66325755 1280hammer_vop_readdir(struct vop_readdir_args *ap)
427e5fc6 1281{
36f82b23 1282 struct hammer_transaction trans;
6b4f890b
MD		 1283 struct hammer_cursor cursor;
1284 struct hammer_inode *ip;
1285 struct uio *uio;
6b4f890b
MD		 1286 hammer_base_elm_t base;
1287 int error;
1288 int cookie_index;
1289 int ncookies;
1290 off_t *cookies;
1291 off_t saveoff;
1292 int r;
ea434b6f 1293 int dtype;
6b4f890b 1294
ce0138a6 1295 ++hammer_stats_file_iopsr;
6b4f890b
MD		 1296 ip = VTOI(ap->a_vp);
1297 uio = ap->a_uio;
b3deaf57
MD		 1298 saveoff = uio->uio_offset;
1299
1300 if (ap->a_ncookies) {
1301 ncookies = uio->uio_resid / 16 + 1;
1302 if (ncookies > 1024)
1303 ncookies = 1024;
1304 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1305 cookie_index = 0;
1306 } else {
1307 ncookies = -1;
1308 cookies = NULL;
1309 cookie_index = 0;
1310 }
1311
36f82b23
MD		 1312 hammer_simple_transaction(&trans, ip->hmp);
1313
b3deaf57
MD		 1314 /*
1315 * Handle artificial entries
4c286c36
MD		 1316 *
1317 * It should be noted that the minimum value for a directory
1318 * hash key on-media is 0x0000000100000000, so we can use anything
1319 * less then that to represent our 'special' key space.
b3deaf57
MD		 1320 */
1321 error = 0;
1322 if (saveoff == 0) {
1323 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1324 if (r)
1325 goto done;
1326 if (cookies)
1327 cookies[cookie_index] = saveoff;
1328 ++saveoff;
1329 ++cookie_index;
1330 if (cookie_index == ncookies)
1331 goto done;
1332 }
1333 if (saveoff == 1) {
1334 if (ip->ino_data.parent_obj_id) {
1335 r = vop_write_dirent(&error, uio,
1336 ip->ino_data.parent_obj_id,
1337 DT_DIR, 2, "..");
1338 } else {
1339 r = vop_write_dirent(&error, uio,
1340 ip->obj_id, DT_DIR, 2, "..");
1341 }
1342 if (r)
1343 goto done;
1344 if (cookies)
1345 cookies[cookie_index] = saveoff;
1346 ++saveoff;
1347 ++cookie_index;
1348 if (cookie_index == ncookies)
1349 goto done;
1350 }
6b4f890b
MD		 1351
1352 /*
1353 * Key range (begin and end inclusive) to scan. Directory keys
1354 * directly translate to a 64 bit 'seek' position.
1355 */
bcac4bbb 1356 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
5a930e66
MD		 1357 cursor.key_beg.localization = ip->obj_localization +
1358 HAMMER_LOCALIZE_MISC;
6b4f890b 1359 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 1360 cursor.key_beg.create_tid = 0;
6b4f890b
MD		 1361 cursor.key_beg.delete_tid = 0;
1362 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1363 cursor.key_beg.obj_type = 0;
b3deaf57 1364 cursor.key_beg.key = saveoff;
6b4f890b
MD		 1365
1366 cursor.key_end = cursor.key_beg;
1367 cursor.key_end.key = HAMMER_MAX_KEY;
d5530d22
MD		 1368 cursor.asof = ip->obj_asof;
1369 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
6b4f890b 1370
4e17f465 1371 error = hammer_ip_first(&cursor);
6b4f890b
MD		 1372
1373 while (error == 0) {
11ad5ade 1374 error = hammer_ip_resolve_data(&cursor);
6b4f890b
MD		 1375 if (error)
1376 break;
11ad5ade 1377 base = &cursor.leaf->base;
6b4f890b 1378 saveoff = base->key;
11ad5ade 1379 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
6b4f890b 1380
7a04d74f
MD		 1381 if (base->obj_id != ip->obj_id)
1382 panic("readdir: bad record at %p", cursor.node);
1383
ea434b6f
MD		 1384 /*
1385 * Convert pseudo-filesystems into softlinks
1386 */
1387 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
6b4f890b 1388 r = vop_write_dirent(
11ad5ade 1389 &error, uio, cursor.data->entry.obj_id,
ea434b6f 1390 dtype,
11ad5ade
MD		 1391 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1392 (void *)cursor.data->entry.name);
6b4f890b
MD		 1393 if (r)
1394 break;
1395 ++saveoff;
1396 if (cookies)
1397 cookies[cookie_index] = base->key;
1398 ++cookie_index;
1399 if (cookie_index == ncookies)
1400 break;
1401 error = hammer_ip_next(&cursor);
1402 }
1403 hammer_done_cursor(&cursor);
1404
b3deaf57 1405done:
b84de5af 1406 hammer_done_transaction(&trans);
36f82b23 1407
6b4f890b
MD		 1408 if (ap->a_eofflag)
1409 *ap->a_eofflag = (error == ENOENT);
6b4f890b
MD		 1410 uio->uio_offset = saveoff;
1411 if (error && cookie_index == 0) {
b3deaf57
MD		 1412 if (error == ENOENT)
1413 error = 0;
6b4f890b
MD		 1414 if (cookies) {
1415 kfree(cookies, M_TEMP);
1416 *ap->a_ncookies = 0;
1417 *ap->a_cookies = NULL;
1418 }
1419 } else {
7a04d74f
MD		 1420 if (error == ENOENT)
1421 error = 0;
6b4f890b
MD		 1422 if (cookies) {
1423 *ap->a_ncookies = cookie_index;
1424 *ap->a_cookies = cookies;
1425 }
1426 }
1427 return(error);
427e5fc6
MD		 1428}
1429
66325755
MD		 1430/*
1431 * hammer_vop_readlink { vp, uio, cred }
1432 */
427e5fc6
MD		 1433static
1434int
66325755 1435hammer_vop_readlink(struct vop_readlink_args *ap)
427e5fc6 1436{
36f82b23 1437 struct hammer_transaction trans;
7a04d74f
MD		 1438 struct hammer_cursor cursor;
1439 struct hammer_inode *ip;
ea434b6f
MD		 1440 char buf[32];
1441 u_int32_t localization;
1442 hammer_pseudofs_inmem_t pfsm;
7a04d74f
MD		 1443 int error;
1444
1445 ip = VTOI(ap->a_vp);
36f82b23 1446
2f85fa4d
MD		 1447 /*
1448 * Shortcut if the symlink data was stuffed into ino_data.
ea434b6f 1449 *
842e7a70
MD		 1450 * Also expand special "@@PFS%05d" softlinks (expansion only
1451 * occurs for non-historical (current) accesses made from the
1452 * primary filesystem).
2f85fa4d
MD		 1453 */
1454 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
ea434b6f
MD		 1455 char *ptr;
1456 int bytes;
1457
1458 ptr = ip->ino_data.ext.symlink;
1459 bytes = (int)ip->ino_data.size;
842e7a70
MD		 1460 if (bytes == 10 &&
1461 ip->obj_asof == HAMMER_MAX_TID &&
1462 ip->obj_localization == 0 &&
1463 strncmp(ptr, "@@PFS", 5) == 0) {
ea434b6f
MD		 1464 hammer_simple_transaction(&trans, ip->hmp);
1465 bcopy(ptr + 5, buf, 5);
1466 buf[5] = 0;
1467 localization = strtoul(buf, NULL, 10) << 16;
1468 pfsm = hammer_load_pseudofs(&trans, localization,
1469 &error);
1470 if (error == 0) {
4c038e17
MD		 1471 if (pfsm->pfsd.mirror_flags &
1472 HAMMER_PFSD_SLAVE) {
cb3c760c 1473 /* vap->va_size == 26 */
4c038e17
MD		 1474 ksnprintf(buf, sizeof(buf),
1475 "@@0x%016llx:%05d",
1476 pfsm->pfsd.sync_end_tid,
1477 localization >> 16);
1478 } else {
cb3c760c
MD		 1479 /* vap->va_size == 10 */
1480 ksnprintf(buf, sizeof(buf),
1481 "@@-1:%05d",
1482 localization >> 16);
1483#if 0
4c038e17
MD		 1484 ksnprintf(buf, sizeof(buf),
1485 "@@0x%016llx:%05d",
1486 HAMMER_MAX_TID,
1487 localization >> 16);
cb3c760c 1488#endif
4c038e17 1489 }
ea434b6f
MD		 1490 ptr = buf;
1491 bytes = strlen(buf);
1492 }
1493 if (pfsm)
1494 hammer_rel_pseudofs(trans.hmp, pfsm);
1495 hammer_done_transaction(&trans);
1496 }
1497 error = uiomove(ptr, bytes, ap->a_uio);
2f85fa4d
MD		 1498 return(error);
1499 }
36f82b23 1500
2f85fa4d
MD		 1501 /*
1502 * Long version
1503 */
1504 hammer_simple_transaction(&trans, ip->hmp);
ce0138a6 1505 ++hammer_stats_file_iopsr;
bcac4bbb 1506 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
7a04d74f
MD		 1507
1508 /*
1509 * Key range (begin and end inclusive) to scan. Directory keys
1510 * directly translate to a 64 bit 'seek' position.
1511 */
5a930e66
MD		 1512 cursor.key_beg.localization = ip->obj_localization +
1513 HAMMER_LOCALIZE_MISC;
7a04d74f 1514 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 1515 cursor.key_beg.create_tid = 0;
7a04d74f
MD		 1516 cursor.key_beg.delete_tid = 0;
1517 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1518 cursor.key_beg.obj_type = 0;
1519 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
d5530d22
MD		 1520 cursor.asof = ip->obj_asof;
1521 cursor.flags |= HAMMER_CURSOR_ASOF;
7a04d74f 1522
45a014dc 1523 error = hammer_ip_lookup(&cursor);
7a04d74f
MD		 1524 if (error == 0) {
1525 error = hammer_ip_resolve_data(&cursor);
1526 if (error == 0) {
11ad5ade
MD		 1527 KKASSERT(cursor.leaf->data_len >=
1528 HAMMER_SYMLINK_NAME_OFF);
1529 error = uiomove(cursor.data->symlink.name,
1530 cursor.leaf->data_len -
1531 HAMMER_SYMLINK_NAME_OFF,
7a04d74f
MD		 1532 ap->a_uio);
1533 }
1534 }
1535 hammer_done_cursor(&cursor);
b84de5af 1536 hammer_done_transaction(&trans);
7a04d74f 1537 return(error);
427e5fc6
MD		 1538}
1539
66325755
MD		 1540/*
1541 * hammer_vop_nremove { nch, dvp, cred }
1542 */
427e5fc6
MD		 1543static
1544int
66325755 1545hammer_vop_nremove(struct vop_nremove_args *ap)
427e5fc6 1546{
b84de5af 1547 struct hammer_transaction trans;
e63644f0 1548 struct hammer_inode *dip;
b84de5af
MD		 1549 int error;
1550
e63644f0
MD		 1551 dip = VTOI(ap->a_dvp);
1552
1553 if (hammer_nohistory(dip) == 0 &&
93291532 1554 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD		 1555 return (error);
1556 }
1557
1558 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 1559 ++hammer_stats_file_iopsw;
d7e278bb 1560 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
b84de5af 1561 hammer_done_transaction(&trans);
fbb84158
MD		 1562 if (error == 0)
1563 hammer_knote(ap->a_dvp, NOTE_WRITE);
b84de5af 1564 return (error);
427e5fc6
MD		 1565}
1566
66325755
MD		 1567/*
1568 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1569 */
427e5fc6
MD		 1570static
1571int
66325755 1572hammer_vop_nrename(struct vop_nrename_args *ap)
427e5fc6 1573{
8cd0a023
MD		 1574 struct hammer_transaction trans;
1575 struct namecache *fncp;
1576 struct namecache *tncp;
1577 struct hammer_inode *fdip;
1578 struct hammer_inode *tdip;
1579 struct hammer_inode *ip;
1580 struct hammer_cursor cursor;
8cd0a023 1581 int64_t namekey;
5e435c92 1582 u_int32_t max_iterations;
11ad5ade 1583 int nlen, error;
8cd0a023 1584
f437a2ab
MD		 1585 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1586 return(EXDEV);
1587 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1588 return(EXDEV);
1589
8cd0a023
MD		 1590 fdip = VTOI(ap->a_fdvp);
1591 tdip = VTOI(ap->a_tdvp);
1592 fncp = ap->a_fnch->ncp;
1593 tncp = ap->a_tnch->ncp;
b3deaf57
MD		 1594 ip = VTOI(fncp->nc_vp);
1595 KKASSERT(ip != NULL);
d113fda1 1596
f437a2ab
MD		 1597 if (fdip->obj_localization != tdip->obj_localization)
1598 return(EXDEV);
1599 if (fdip->obj_localization != ip->obj_localization)
1600 return(EXDEV);
1601
d113fda1
MD		 1602 if (fdip->flags & HAMMER_INODE_RO)
1603 return (EROFS);
1604 if (tdip->flags & HAMMER_INODE_RO)
1605 return (EROFS);
1606 if (ip->flags & HAMMER_INODE_RO)
1607 return (EROFS);
93291532 1608 if ((error = hammer_checkspace(fdip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1609 return (error);
d113fda1 1610
8cd0a023 1611 hammer_start_transaction(&trans, fdip->hmp);
ce0138a6 1612 ++hammer_stats_file_iopsw;
8cd0a023
MD		 1613
1614 /*
b3deaf57
MD		 1615 * Remove tncp from the target directory and then link ip as
1616 * tncp. XXX pass trans to dounlink
42c7d26b
MD		 1617 *
1618 * Force the inode sync-time to match the transaction so it is
1619 * in-sync with the creation of the target directory entry.
8cd0a023 1620 */
d7e278bb
MD		 1621 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
1622 ap->a_cred, 0, -1);
42c7d26b 1623 if (error == 0 || error == ENOENT) {
5a930e66
MD		 1624 error = hammer_ip_add_directory(&trans, tdip,
1625 tncp->nc_name, tncp->nc_nlen,
1626 ip);
42c7d26b
MD		 1627 if (error == 0) {
1628 ip->ino_data.parent_obj_id = tdip->obj_id;
cc0758d0 1629 ip->ino_data.ctime = trans.time;
47637bff 1630 hammer_modify_inode(ip, HAMMER_INODE_DDIRTY);
42c7d26b
MD		 1631 }
1632 }
b3deaf57
MD		 1633 if (error)
1634 goto failed; /* XXX */
8cd0a023
MD		 1635
1636 /*
1637 * Locate the record in the originating directory and remove it.
1638 *
1639 * Calculate the namekey and setup the key range for the scan. This
1640 * works kinda like a chained hash table where the lower 32 bits
1641 * of the namekey synthesize the chain.
1642 *
1643 * The key range is inclusive of both key_beg and key_end.
1644 */
5e435c92
MD		 1645 namekey = hammer_directory_namekey(fdip, fncp->nc_name, fncp->nc_nlen,
1646 &max_iterations);
6a37e7e4 1647retry:
bcac4bbb 1648 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
5a930e66
MD		 1649 cursor.key_beg.localization = fdip->obj_localization +
1650 HAMMER_LOCALIZE_MISC;
8cd0a023
MD		 1651 cursor.key_beg.obj_id = fdip->obj_id;
1652 cursor.key_beg.key = namekey;
d5530d22 1653 cursor.key_beg.create_tid = 0;
8cd0a023
MD		 1654 cursor.key_beg.delete_tid = 0;
1655 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1656 cursor.key_beg.obj_type = 0;
1657
1658 cursor.key_end = cursor.key_beg;
5e435c92 1659 cursor.key_end.key += max_iterations;
d5530d22
MD		 1660 cursor.asof = fdip->obj_asof;
1661 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
8cd0a023
MD		 1662
1663 /*
1664 * Scan all matching records (the chain), locate the one matching
a89aec1b 1665 * the requested path component.
8cd0a023
MD		 1666 *
1667 * The hammer_ip_*() functions merge in-memory records with on-disk
1668 * records for the purposes of the search.
1669 */
4e17f465 1670 error = hammer_ip_first(&cursor);
a89aec1b 1671 while (error == 0) {
8cd0a023
MD		 1672 if (hammer_ip_resolve_data(&cursor) != 0)
1673 break;
11ad5ade
MD		 1674 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
1675 KKASSERT(nlen > 0);
1676 if (fncp->nc_nlen == nlen &&
1677 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
8cd0a023
MD		 1678 break;
1679 }
a89aec1b 1680 error = hammer_ip_next(&cursor);
8cd0a023 1681 }
8cd0a023
MD		 1682
1683 /*
1684 * If all is ok we have to get the inode so we can adjust nlinks.
6a37e7e4
MD		 1685 *
1686 * WARNING: hammer_ip_del_directory() may have to terminate the
1687 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1688 * twice.
8cd0a023 1689 */
9944ae54 1690 if (error == 0)
6a37e7e4 1691 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
b84de5af
MD		 1692
1693 /*
1694 * XXX A deadlock here will break rename's atomicy for the purposes
1695 * of crash recovery.
1696 */
1697 if (error == EDEADLK) {
b84de5af 1698 hammer_done_cursor(&cursor);
b84de5af
MD		 1699 goto retry;
1700 }
1701
1702 /*
1703 * Cleanup and tell the kernel that the rename succeeded.
1704 */
c0ade690 1705 hammer_done_cursor(&cursor);
fbb84158 1706 if (error == 0) {
6a37e7e4 1707 cache_rename(ap->a_fnch, ap->a_tnch);
fbb84158
MD		 1708 hammer_knote(ap->a_fdvp, NOTE_WRITE);
1709 hammer_knote(ap->a_tdvp, NOTE_WRITE);
1710 if (ip->vp)
1711 hammer_knote(ip->vp, NOTE_RENAME);
1712 }
b84de5af 1713
b3deaf57 1714failed:
b84de5af 1715 hammer_done_transaction(&trans);
8cd0a023 1716 return (error);
427e5fc6
MD		 1717}
1718
66325755
MD		 1719/*
1720 * hammer_vop_nrmdir { nch, dvp, cred }
1721 */
427e5fc6
MD		 1722static
1723int
66325755 1724hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
427e5fc6 1725{
b84de5af 1726 struct hammer_transaction trans;
e63644f0 1727 struct hammer_inode *dip;
b84de5af
MD		 1728 int error;
1729
e63644f0
MD		 1730 dip = VTOI(ap->a_dvp);
1731
1732 if (hammer_nohistory(dip) == 0 &&
93291532 1733 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD		 1734 return (error);
1735 }
1736
1737 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 1738 ++hammer_stats_file_iopsw;
d7e278bb 1739 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
b84de5af 1740 hammer_done_transaction(&trans);
fbb84158
MD		 1741 if (error == 0)
1742 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
b84de5af 1743 return (error);
427e5fc6
MD		 1744}
1745
66325755 1746/*
349433c9
MD		 1747 * hammer_vop_markatime { vp, cred }
1748 */
1749static
1750int
1751hammer_vop_markatime(struct vop_markatime_args *ap)
1752{
1753 struct hammer_transaction trans;
1754 struct hammer_inode *ip;
1755
1756 ip = VTOI(ap->a_vp);
1757 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1758 return (EROFS);
1759 if (ip->flags & HAMMER_INODE_RO)
1760 return (EROFS);
1761 if (ip->hmp->mp->mnt_flag & MNT_NOATIME)
1762 return (0);
1763 hammer_start_transaction(&trans, ip->hmp);
1764 ++hammer_stats_file_iopsw;
1765
1766 ip->ino_data.atime = trans.time;
1767 hammer_modify_inode(ip, HAMMER_INODE_ATIME);
1768 hammer_done_transaction(&trans);
1769 hammer_knote(ap->a_vp, NOTE_ATTRIB);
1770 return (0);
1771}
1772
1773/*
66325755
MD		 1774 * hammer_vop_setattr { vp, vap, cred }
1775 */
427e5fc6
MD		 1776static
1777int
66325755 1778hammer_vop_setattr(struct vop_setattr_args *ap)
427e5fc6 1779{
8cd0a023
MD		 1780 struct hammer_transaction trans;
1781 struct vattr *vap;
1782 struct hammer_inode *ip;
1783 int modflags;
1784 int error;
d5ef456e 1785 int truncating;
4a2796f3 1786 int blksize;
fbb84158 1787 int kflags;
4a2796f3 1788 int64_t aligned_size;
8cd0a023 1789 u_int32_t flags;
8cd0a023
MD		 1790
1791 vap = ap->a_vap;
1792 ip = ap->a_vp->v_data;
1793 modflags = 0;
fbb84158 1794 kflags = 0;
8cd0a023
MD		 1795
1796 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1797 return(EROFS);
d113fda1
MD		 1798 if (ip->flags & HAMMER_INODE_RO)
1799 return (EROFS);
e63644f0 1800 if (hammer_nohistory(ip) == 0 &&
93291532 1801 (error = hammer_checkspace(ip->hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD		 1802 return (error);
1803 }
8cd0a023
MD		 1804
1805 hammer_start_transaction(&trans, ip->hmp);
ce0138a6 1806 ++hammer_stats_file_iopsw;
8cd0a023
MD		 1807 error = 0;
1808
1809 if (vap->va_flags != VNOVAL) {
1810 flags = ip->ino_data.uflags;
1811 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1812 hammer_to_unix_xid(&ip->ino_data.uid),
1813 ap->a_cred);
1814 if (error == 0) {
1815 if (ip->ino_data.uflags != flags) {
1816 ip->ino_data.uflags = flags;
cc0758d0 1817 ip->ino_data.ctime = trans.time;
8cd0a023 1818 modflags |= HAMMER_INODE_DDIRTY;
fbb84158 1819 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1820 }
1821 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1822 error = 0;
1823 goto done;
1824 }
1825 }
1826 goto done;
1827 }
1828 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1829 error = EPERM;
1830 goto done;
1831 }
7538695e
MD		 1832 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
1833 mode_t cur_mode = ip->ino_data.mode;
1834 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1835 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1836 uuid_t uuid_uid;
1837 uuid_t uuid_gid;
1838
1839 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
1840 ap->a_cred,
1841 &cur_uid, &cur_gid, &cur_mode);
1842 if (error == 0) {
1843 hammer_guid_to_uuid(&uuid_uid, cur_uid);
1844 hammer_guid_to_uuid(&uuid_gid, cur_gid);
1845 if (bcmp(&uuid_uid, &ip->ino_data.uid,
1846 sizeof(uuid_uid)) ||
1847 bcmp(&uuid_gid, &ip->ino_data.gid,
1848 sizeof(uuid_gid)) ||
1849 ip->ino_data.mode != cur_mode
1850 ) {
1851 ip->ino_data.uid = uuid_uid;
1852 ip->ino_data.gid = uuid_gid;
1853 ip->ino_data.mode = cur_mode;
cc0758d0
MD		 1854 ip->ino_data.ctime = trans.time;
1855 modflags |= HAMMER_INODE_DDIRTY;
7538695e 1856 }
fbb84158 1857 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1858 }
1859 }
11ad5ade 1860 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
8cd0a023
MD		 1861 switch(ap->a_vp->v_type) {
1862 case VREG:
11ad5ade 1863 if (vap->va_size == ip->ino_data.size)
d5ef456e 1864 break;
b84de5af
MD		 1865 /*
1866 * XXX break atomicy, we can deadlock the backend
1867 * if we do not release the lock. Probably not a
1868 * big deal here.
1869 */
4a2796f3 1870 blksize = hammer_blocksize(vap->va_size);
11ad5ade 1871 if (vap->va_size < ip->ino_data.size) {
4a2796f3 1872 vtruncbuf(ap->a_vp, vap->va_size, blksize);
d5ef456e 1873 truncating = 1;
fbb84158 1874 kflags |= NOTE_WRITE;
d5ef456e 1875 } else {
c0ade690 1876 vnode_pager_setsize(ap->a_vp, vap->va_size);
d5ef456e 1877 truncating = 0;
fbb84158 1878 kflags |= NOTE_WRITE | NOTE_EXTEND;
c0ade690 1879 }
11ad5ade 1880 ip->ino_data.size = vap->va_size;
cc0758d0
MD		 1881 ip->ino_data.mtime = trans.time;
1882 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
d5ef456e 1883
b84de5af
MD		 1884 /*
1885 * on-media truncation is cached in the inode until
1886 * the inode is synchronized.
1887 */
d5ef456e 1888 if (truncating) {
47637bff 1889 hammer_ip_frontend_trunc(ip, vap->va_size);
0832c9bb
MD		 1890#ifdef DEBUG_TRUNCATE
1891 if (HammerTruncIp == NULL)
1892 HammerTruncIp = ip;
1893#endif
b84de5af
MD		 1894 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1895 ip->flags |= HAMMER_INODE_TRUNCATED;
1896 ip->trunc_off = vap->va_size;
0832c9bb
MD		 1897#ifdef DEBUG_TRUNCATE
1898 if (ip == HammerTruncIp)
1899 kprintf("truncate1 %016llx\n", ip->trunc_off);
1900#endif
b84de5af
MD		 1901 } else if (ip->trunc_off > vap->va_size) {
1902 ip->trunc_off = vap->va_size;
0832c9bb
MD		 1903#ifdef DEBUG_TRUNCATE
1904 if (ip == HammerTruncIp)
1905 kprintf("truncate2 %016llx\n", ip->trunc_off);
1906#endif
1907 } else {
1908#ifdef DEBUG_TRUNCATE
1909 if (ip == HammerTruncIp)
1910 kprintf("truncate3 %016llx (ignored)\n", vap->va_size);
1911#endif
b84de5af 1912 }
d5ef456e 1913 }
b84de5af 1914
d5ef456e
MD		 1915 /*
1916 * If truncating we have to clean out a portion of
b84de5af
MD		 1917 * the last block on-disk. We do this in the
1918 * front-end buffer cache.
d5ef456e 1919 */
4a2796f3
MD		 1920 aligned_size = (vap->va_size + (blksize - 1)) &
1921 ~(int64_t)(blksize - 1);
b84de5af 1922 if (truncating && vap->va_size < aligned_size) {
d5ef456e
MD		 1923 struct buf *bp;
1924 int offset;
1925
4a2796f3 1926 aligned_size -= blksize;
47637bff 1927
4a2796f3 1928 offset = (int)vap->va_size & (blksize - 1);
47637bff 1929 error = bread(ap->a_vp, aligned_size,
4a2796f3 1930 blksize, &bp);
47637bff 1931 hammer_ip_frontend_trunc(ip, aligned_size);
d5ef456e
MD		 1932 if (error == 0) {
1933 bzero(bp->b_data + offset,
4a2796f3 1934 blksize - offset);
1b0ab2c3
MD		 1935 /* must de-cache direct-io offset */
1936 bp->b_bio2.bio_offset = NOOFFSET;
d5ef456e
MD		 1937 bdwrite(bp);
1938 } else {
47637bff 1939 kprintf("ERROR %d\n", error);
d5ef456e
MD		 1940 brelse(bp);
1941 }
1942 }
76376933 1943 break;
8cd0a023 1944 case VDATABASE:
b84de5af
MD		 1945 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
1946 ip->flags |= HAMMER_INODE_TRUNCATED;
1947 ip->trunc_off = vap->va_size;
1948 } else if (ip->trunc_off > vap->va_size) {
1949 ip->trunc_off = vap->va_size;
1950 }
47637bff 1951 hammer_ip_frontend_trunc(ip, vap->va_size);
11ad5ade 1952 ip->ino_data.size = vap->va_size;
cc0758d0
MD		 1953 ip->ino_data.mtime = trans.time;
1954 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
fbb84158 1955 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1956 break;
1957 default:
1958 error = EINVAL;
1959 goto done;
1960 }
d26d0ae9 1961 break;
8cd0a023
MD		 1962 }
1963 if (vap->va_atime.tv_sec != VNOVAL) {
cc0758d0 1964 ip->ino_data.atime = hammer_timespec_to_time(&vap->va_atime);
ddfdf542 1965 modflags |= HAMMER_INODE_ATIME;
fbb84158 1966 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1967 }
1968 if (vap->va_mtime.tv_sec != VNOVAL) {
cc0758d0 1969 ip->ino_data.mtime = hammer_timespec_to_time(&vap->va_mtime);
ddfdf542 1970 modflags |= HAMMER_INODE_MTIME;
fbb84158 1971 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1972 }
1973 if (vap->va_mode != (mode_t)VNOVAL) {
7538695e
MD		 1974 mode_t cur_mode = ip->ino_data.mode;
1975 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1976 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1977
1978 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
1979 cur_uid, cur_gid, &cur_mode);
1980 if (error == 0 && ip->ino_data.mode != cur_mode) {
1981 ip->ino_data.mode = cur_mode;
cc0758d0 1982 ip->ino_data.ctime = trans.time;
8cd0a023 1983 modflags |= HAMMER_INODE_DDIRTY;
fbb84158 1984 kflags |= NOTE_ATTRIB;
8cd0a023
MD		 1985 }
1986 }
1987done:
b84de5af 1988 if (error == 0)
47637bff 1989 hammer_modify_inode(ip, modflags);
b84de5af 1990 hammer_done_transaction(&trans);
fbb84158 1991 hammer_knote(ap->a_vp, kflags);
8cd0a023 1992 return (error);
427e5fc6
MD		 1993}
1994
66325755
MD		 1995/*
1996 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1997 */
427e5fc6
MD		 1998static
1999int
66325755 2000hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
427e5fc6 2001{
7a04d74f
MD		 2002 struct hammer_transaction trans;
2003 struct hammer_inode *dip;
2004 struct hammer_inode *nip;
2005 struct nchandle *nch;
2006 hammer_record_t record;
2007 int error;
2008 int bytes;
2009
2010 ap->a_vap->va_type = VLNK;
2011
2012 nch = ap->a_nch;
2013 dip = VTOI(ap->a_dvp);
2014
d113fda1
MD		 2015 if (dip->flags & HAMMER_INODE_RO)
2016 return (EROFS);
93291532 2017 if ((error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 2018 return (error);
d113fda1 2019
7a04d74f
MD		 2020 /*
2021 * Create a transaction to cover the operations we perform.
2022 */
2023 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 2024 ++hammer_stats_file_iopsw;
7a04d74f
MD		 2025
2026 /*
2027 * Create a new filesystem object of the requested type. The
2028 * returned inode will be referenced but not locked.
2029 */
2030
5a930e66 2031 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
ea434b6f 2032 dip, NULL, &nip);
7a04d74f 2033 if (error) {
b84de5af 2034 hammer_done_transaction(&trans);
7a04d74f
MD		 2035 *ap->a_vpp = NULL;
2036 return (error);
2037 }
2038
2039 /*
7a04d74f
MD		 2040 * Add a record representing the symlink. symlink stores the link
2041 * as pure data, not a string, and is no \0 terminated.
2042 */
2043 if (error == 0) {
7a04d74f
MD		 2044 bytes = strlen(ap->a_target);
2045
2f85fa4d
MD		 2046 if (bytes <= HAMMER_INODE_BASESYMLEN) {
2047 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
2048 } else {
2049 record = hammer_alloc_mem_record(nip, bytes);
2050 record->type = HAMMER_MEM_RECORD_GENERAL;
2051
5a930e66
MD		 2052 record->leaf.base.localization = nip->obj_localization +
2053 HAMMER_LOCALIZE_MISC;
2f85fa4d
MD		 2054 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
2055 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
2056 record->leaf.data_len = bytes;
2057 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
2058 bcopy(ap->a_target, record->data->symlink.name, bytes);
2059 error = hammer_ip_add_record(&trans, record);
2060 }
42c7d26b
MD		 2061
2062 /*
2063 * Set the file size to the length of the link.
2064 */
2065 if (error == 0) {
11ad5ade 2066 nip->ino_data.size = bytes;
47637bff 2067 hammer_modify_inode(nip, HAMMER_INODE_DDIRTY);
42c7d26b 2068 }
7a04d74f 2069 }
1f07f686 2070 if (error == 0)
5a930e66
MD		 2071 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
2072 nch->ncp->nc_nlen, nip);
7a04d74f
MD		 2073
2074 /*
2075 * Finish up.
2076 */
2077 if (error) {
2078 hammer_rel_inode(nip, 0);
7a04d74f
MD		 2079 *ap->a_vpp = NULL;
2080 } else {
e8599db1 2081 error = hammer_get_vnode(nip, ap->a_vpp);
7a04d74f
MD		 2082 hammer_rel_inode(nip, 0);
2083 if (error == 0) {
2084 cache_setunresolved(ap->a_nch);
2085 cache_setvp(ap->a_nch, *ap->a_vpp);
fbb84158 2086 hammer_knote(ap->a_dvp, NOTE_WRITE);
7a04d74f
MD		 2087 }
2088 }
b84de5af 2089 hammer_done_transaction(&trans);
7a04d74f 2090 return (error);
427e5fc6
MD		 2091}
2092
66325755
MD		 2093/*
2094 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2095 */
427e5fc6
MD		 2096static
2097int
66325755 2098hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
427e5fc6 2099{
b84de5af 2100 struct hammer_transaction trans;
e63644f0 2101 struct hammer_inode *dip;
b84de5af
MD		 2102 int error;
2103
e63644f0
MD		 2104 dip = VTOI(ap->a_dvp);
2105
2106 if (hammer_nohistory(dip) == 0 &&
93291532 2107 (error = hammer_checkspace(dip->hmp, HAMMER_CHKSPC_CREATE)) != 0) {
e63644f0
MD		 2108 return (error);
2109 }
2110
2111 hammer_start_transaction(&trans, dip->hmp);
ce0138a6 2112 ++hammer_stats_file_iopsw;
b84de5af 2113 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
d7e278bb 2114 ap->a_cred, ap->a_flags, -1);
b84de5af
MD		 2115 hammer_done_transaction(&trans);
2116
2117 return (error);
427e5fc6
MD		 2118}
2119
66325755 2120/*
7dc57964
MD		 2121 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2122 */
2123static
2124int
2125hammer_vop_ioctl(struct vop_ioctl_args *ap)
2126{
2127 struct hammer_inode *ip = ap->a_vp->v_data;
2128
ce0138a6 2129 ++hammer_stats_file_iopsr;
7dc57964
MD		 2130 return(hammer_ioctl(ip, ap->a_command, ap->a_data,
2131 ap->a_fflag, ap->a_cred));
2132}
2133
513ca7d7
MD		 2134static
2135int
2136hammer_vop_mountctl(struct vop_mountctl_args *ap)
2137{
2138 struct mount *mp;
2139 int error;
2140
2141 mp = ap->a_head.a_ops->head.vv_mount;
2142
2143 switch(ap->a_op) {
2144 case MOUNTCTL_SET_EXPORT:
2145 if (ap->a_ctllen != sizeof(struct export_args))
2146 error = EINVAL;
b424ca30
MD		 2147 else
2148 error = hammer_vfs_export(mp, ap->a_op,
513ca7d7
MD		 2149 (const struct export_args *)ap->a_ctl);
2150 break;
2151 default:
2152 error = journal_mountctl(ap);
2153 break;
2154 }
2155 return(error);
2156}
2157
7dc57964 2158/*
66325755 2159 * hammer_vop_strategy { vp, bio }
8cd0a023
MD		 2160 *
2161 * Strategy call, used for regular file read & write only. Note that the
2162 * bp may represent a cluster.
2163 *
2164 * To simplify operation and allow better optimizations in the future,
2165 * this code does not make any assumptions with regards to buffer alignment
2166 * or size.
66325755 2167 */
427e5fc6
MD		 2168static
2169int
66325755 2170hammer_vop_strategy(struct vop_strategy_args *ap)
427e5fc6 2171{
8cd0a023
MD		 2172 struct buf *bp;
2173 int error;
2174
2175 bp = ap->a_bio->bio_buf;
2176
2177 switch(bp->b_cmd) {
2178 case BUF_CMD_READ:
2179 error = hammer_vop_strategy_read(ap);
2180 break;
2181 case BUF_CMD_WRITE:
2182 error = hammer_vop_strategy_write(ap);
2183 break;
2184 default:
059819e3
MD		 2185 bp->b_error = error = EINVAL;
2186 bp->b_flags |= B_ERROR;
2187 biodone(ap->a_bio);
8cd0a023
MD		 2188 break;
2189 }
8cd0a023 2190 return (error);
427e5fc6
MD		 2191}
2192
8cd0a023
MD		 2193/*
2194 * Read from a regular file. Iterate the related records and fill in the
2195 * BIO/BUF. Gaps are zero-filled.
2196 *
2197 * The support code in hammer_object.c should be used to deal with mixed
2198 * in-memory and on-disk records.
2199 *
4a2796f3
MD		 2200 * NOTE: Can be called from the cluster code with an oversized buf.
2201 *
8cd0a023
MD		 2202 * XXX atime update
2203 */
2204static
2205int
2206hammer_vop_strategy_read(struct vop_strategy_args *ap)
2207{
36f82b23
MD		 2208 struct hammer_transaction trans;
2209 struct hammer_inode *ip;
8cd0a023 2210 struct hammer_cursor cursor;
8cd0a023 2211 hammer_base_elm_t base;
4a2796f3 2212 hammer_off_t disk_offset;
8cd0a023 2213 struct bio *bio;
a99b9ea2 2214 struct bio *nbio;
8cd0a023
MD		 2215 struct buf *bp;
2216 int64_t rec_offset;
a89aec1b 2217 int64_t ran_end;
195c19a1 2218 int64_t tmp64;
8cd0a023
MD		 2219 int error;
2220 int boff;
2221 int roff;
2222 int n;
2223
2224 bio = ap->a_bio;
2225 bp = bio->bio_buf;
36f82b23 2226 ip = ap->a_vp->v_data;
8cd0a023 2227
a99b9ea2
MD		 2228 /*
2229 * The zone-2 disk offset may have been set by the cluster code via
4a2796f3 2230 * a BMAP operation, or else should be NOOFFSET.
a99b9ea2 2231 *
4a2796f3 2232 * Checking the high bits for a match against zone-2 should suffice.
a99b9ea2
MD		 2233 */
2234 nbio = push_bio(bio);
6aeaa7bd 2235 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
1b0ab2c3
MD		 2236 HAMMER_ZONE_LARGE_DATA) {
2237 error = hammer_io_direct_read(ip->hmp, nbio, NULL);
a99b9ea2
MD		 2238 return (error);
2239 }
2240
2241 /*
4a2796f3
MD		 2242 * Well, that sucked. Do it the hard way. If all the stars are
2243 * aligned we may still be able to issue a direct-read.
a99b9ea2 2244 */
36f82b23 2245 hammer_simple_transaction(&trans, ip->hmp);
47637bff 2246 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
8cd0a023
MD		 2247
2248 /*
2249 * Key range (begin and end inclusive) to scan. Note that the key's
c0ade690
MD		 2250 * stored in the actual records represent BASE+LEN, not BASE. The
2251 * first record containing bio_offset will have a key > bio_offset.
8cd0a023 2252 */
5a930e66
MD		 2253 cursor.key_beg.localization = ip->obj_localization +
2254 HAMMER_LOCALIZE_MISC;
8cd0a023 2255 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 2256 cursor.key_beg.create_tid = 0;
8cd0a023 2257 cursor.key_beg.delete_tid = 0;
8cd0a023 2258 cursor.key_beg.obj_type = 0;
c0ade690 2259 cursor.key_beg.key = bio->bio_offset + 1;
d5530d22 2260 cursor.asof = ip->obj_asof;
bf3b416b 2261 cursor.flags |= HAMMER_CURSOR_ASOF;
8cd0a023
MD		 2262
2263 cursor.key_end = cursor.key_beg;
11ad5ade 2264 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
b84de5af 2265#if 0
11ad5ade 2266 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
a89aec1b
MD		 2267 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2268 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2269 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
b84de5af
MD		 2270 } else
2271#endif
2272 {
c0ade690 2273 ran_end = bio->bio_offset + bp->b_bufsize;
a89aec1b
MD		 2274 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2275 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
195c19a1
MD		 2276 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2277 if (tmp64 < ran_end)
a89aec1b
MD		 2278 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2279 else
7f7c1f84 2280 cursor.key_end.key = ran_end + MAXPHYS + 1;
a89aec1b 2281 }
d26d0ae9 2282 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
8cd0a023 2283
4e17f465 2284 error = hammer_ip_first(&cursor);
8cd0a023
MD		 2285 boff = 0;
2286
a89aec1b 2287 while (error == 0) {
47637bff
MD		 2288 /*
2289 * Get the base file offset of the record. The key for
2290 * data records is (base + bytes) rather then (base).
2291 */
11ad5ade 2292 base = &cursor.leaf->base;
11ad5ade 2293 rec_offset = base->key - cursor.leaf->data_len;
8cd0a023 2294
66325755 2295 /*
a89aec1b 2296 * Calculate the gap, if any, and zero-fill it.
1fef775e
MD		 2297 *
2298 * n is the offset of the start of the record verses our
2299 * current seek offset in the bio.
66325755 2300 */
8cd0a023
MD		 2301 n = (int)(rec_offset - (bio->bio_offset + boff));
2302 if (n > 0) {
a89aec1b
MD		 2303 if (n > bp->b_bufsize - boff)
2304 n = bp->b_bufsize - boff;
8cd0a023
MD		 2305 bzero((char *)bp->b_data + boff, n);
2306 boff += n;
2307 n = 0;
66325755 2308 }
8cd0a023
MD		 2309
2310 /*
2311 * Calculate the data offset in the record and the number
2312 * of bytes we can copy.
a89aec1b 2313 *
1fef775e
MD		 2314 * There are two degenerate cases. First, boff may already
2315 * be at bp->b_bufsize. Secondly, the data offset within
2316 * the record may exceed the record's size.
8cd0a023
MD		 2317 */
2318 roff = -n;
b84de5af 2319 rec_offset += roff;
11ad5ade 2320 n = cursor.leaf->data_len - roff;
1fef775e
MD		 2321 if (n <= 0) {
2322 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2323 n = 0;
2324 } else if (n > bp->b_bufsize - boff) {
8cd0a023 2325 n = bp->b_bufsize - boff;
1fef775e 2326 }
059819e3 2327
b84de5af 2328 /*
47637bff
MD		 2329 * Deal with cached truncations. This cool bit of code
2330 * allows truncate()/ftruncate() to avoid having to sync
2331 * the file.
2332 *
2333 * If the frontend is truncated then all backend records are
2334 * subject to the frontend's truncation.
2335 *
2336 * If the backend is truncated then backend records on-disk
2337 * (but not in-memory) are subject to the backend's
2338 * truncation. In-memory records owned by the backend
2339 * represent data written after the truncation point on the
2340 * backend and must not be truncated.
2341 *
2342 * Truncate operations deal with frontend buffer cache
2343 * buffers and frontend-owned in-memory records synchronously.
b84de5af 2344 */
47637bff
MD		 2345 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2346 if (hammer_cursor_ondisk(&cursor) ||
2347 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2348 if (ip->trunc_off <= rec_offset)
2349 n = 0;
2350 else if (ip->trunc_off < rec_offset + n)
2351 n = (int)(ip->trunc_off - rec_offset);
2352 }
2353 }
2354 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2355 if (hammer_cursor_ondisk(&cursor)) {
2356 if (ip->sync_trunc_off <= rec_offset)
2357 n = 0;
2358 else if (ip->sync_trunc_off < rec_offset + n)
2359 n = (int)(ip->sync_trunc_off - rec_offset);
2360 }
2361 }
b84de5af
MD		 2362
2363 /*
47637bff
MD		 2364 * Try to issue a direct read into our bio if possible,
2365 * otherwise resolve the element data into a hammer_buffer
2366 * and copy.
4a2796f3
MD		 2367 *
2368 * The buffer on-disk should be zerod past any real
2369 * truncation point, but may not be for any synthesized
2370 * truncation point from above.
b84de5af 2371 */
1b0ab2c3 2372 disk_offset = cursor.leaf->data_offset + roff;
4a2796f3 2373 if (boff == 0 && n == bp->b_bufsize &&
1b0ab2c3
MD		 2374 hammer_cursor_ondisk(&cursor) &&
2375 (disk_offset & HAMMER_BUFMASK) == 0) {
2376 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2377 HAMMER_ZONE_LARGE_DATA);
4a2796f3 2378 nbio->bio_offset = disk_offset;
1b0ab2c3
MD		 2379 error = hammer_io_direct_read(trans.hmp, nbio,
2380 cursor.leaf);
47637bff
MD		 2381 goto done;
2382 } else if (n) {
2383 error = hammer_ip_resolve_data(&cursor);
2384 if (error == 0) {
2385 bcopy((char *)cursor.data + roff,
2386 (char *)bp->b_data + boff, n);
2387 }
b84de5af 2388 }
47637bff
MD		 2389 if (error)
2390 break;
2391
2392 /*
2393 * Iterate until we have filled the request.
2394 */
2395 boff += n;
8cd0a023 2396 if (boff == bp->b_bufsize)
66325755 2397 break;
a89aec1b 2398 error = hammer_ip_next(&cursor);
66325755
MD		 2399 }
2400
2401 /*
8cd0a023 2402 * There may have been a gap after the last record
66325755 2403 */
8cd0a023
MD		 2404 if (error == ENOENT)
2405 error = 0;
2406 if (error == 0 && boff != bp->b_bufsize) {
7f7c1f84 2407 KKASSERT(boff < bp->b_bufsize);
8cd0a023
MD		 2408 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2409 /* boff = bp->b_bufsize; */
2410 }
2411 bp->b_resid = 0;
059819e3
MD		 2412 bp->b_error = error;
2413 if (error)
2414 bp->b_flags |= B_ERROR;
2415 biodone(ap->a_bio);
47637bff
MD		 2416
2417done:
2418 if (cursor.node)
bcac4bbb 2419 hammer_cache_node(&ip->cache[1], cursor.node);
47637bff
MD		 2420 hammer_done_cursor(&cursor);
2421 hammer_done_transaction(&trans);
8cd0a023
MD		 2422 return(error);
2423}
2424
2425/*
a99b9ea2
MD		 2426 * BMAP operation - used to support cluster_read() only.
2427 *
2428 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
2429 *
2430 * This routine may return EOPNOTSUPP if the opration is not supported for
2431 * the specified offset. The contents of the pointer arguments do not
2432 * need to be initialized in that case.
2433 *
2434 * If a disk address is available and properly aligned return 0 with
2435 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
2436 * to the run-length relative to that offset. Callers may assume that
2437 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
2438 * large, so return EOPNOTSUPP if it is not sufficiently large.
2439 */
2440static
2441int
2442hammer_vop_bmap(struct vop_bmap_args *ap)
2443{
2444 struct hammer_transaction trans;
2445 struct hammer_inode *ip;
2446 struct hammer_cursor cursor;
2447 hammer_base_elm_t base;
2448 int64_t rec_offset;
2449 int64_t ran_end;
2450 int64_t tmp64;
2451 int64_t base_offset;
2452 int64_t base_disk_offset;
2453 int64_t last_offset;
2454 hammer_off_t last_disk_offset;
2455 hammer_off_t disk_offset;
2456 int rec_len;
2457 int error;
4a2796f3 2458 int blksize;
a99b9ea2 2459
ce0138a6 2460 ++hammer_stats_file_iopsr;
a99b9ea2
MD		 2461 ip = ap->a_vp->v_data;
2462
2463 /*
2464 * We can only BMAP regular files. We can't BMAP database files,
2465 * directories, etc.
2466 */
2467 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
2468 return(EOPNOTSUPP);
2469
2470 /*
2471 * bmap is typically called with runp/runb both NULL when used
2472 * for writing. We do not support BMAP for writing atm.
2473 */
4a2796f3 2474 if (ap->a_cmd != BUF_CMD_READ)
a99b9ea2
MD		 2475 return(EOPNOTSUPP);
2476
2477 /*
2478 * Scan the B-Tree to acquire blockmap addresses, then translate
2479 * to raw addresses.
2480 */
2481 hammer_simple_transaction(&trans, ip->hmp);
cb51be26
MD		 2482#if 0
2483 kprintf("bmap_beg %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2484#endif
a99b9ea2
MD		 2485 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
2486
2487 /*
2488 * Key range (begin and end inclusive) to scan. Note that the key's
2489 * stored in the actual records represent BASE+LEN, not BASE. The
2490 * first record containing bio_offset will have a key > bio_offset.
2491 */
5a930e66
MD		 2492 cursor.key_beg.localization = ip->obj_localization +
2493 HAMMER_LOCALIZE_MISC;
a99b9ea2
MD		 2494 cursor.key_beg.obj_id = ip->obj_id;
2495 cursor.key_beg.create_tid = 0;
2496 cursor.key_beg.delete_tid = 0;
2497 cursor.key_beg.obj_type = 0;
2498 if (ap->a_runb)
2499 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
2500 else
2501 cursor.key_beg.key = ap->a_loffset + 1;
2502 if (cursor.key_beg.key < 0)
2503 cursor.key_beg.key = 0;
2504 cursor.asof = ip->obj_asof;
bf3b416b 2505 cursor.flags |= HAMMER_CURSOR_ASOF;
a99b9ea2
MD		 2506
2507 cursor.key_end = cursor.key_beg;
2508 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
2509
2510 ran_end = ap->a_loffset + MAXPHYS;
2511 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2512 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
2513 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2514 if (tmp64 < ran_end)
2515 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2516 else
2517 cursor.key_end.key = ran_end + MAXPHYS + 1;
2518
2519 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
2520
2521 error = hammer_ip_first(&cursor);
2522 base_offset = last_offset = 0;
2523 base_disk_offset = last_disk_offset = 0;
2524
2525 while (error == 0) {
2526 /*
2527 * Get the base file offset of the record. The key for
2528 * data records is (base + bytes) rather then (base).
4a2796f3
MD		 2529 *
2530 * NOTE: rec_offset + rec_len may exceed the end-of-file.
2531 * The extra bytes should be zero on-disk and the BMAP op
2532 * should still be ok.
a99b9ea2
MD		 2533 */
2534 base = &cursor.leaf->base;
2535 rec_offset = base->key - cursor.leaf->data_len;
2536 rec_len = cursor.leaf->data_len;
2537
2538 /*
4a2796f3
MD		 2539 * Incorporate any cached truncation.
2540 *
2541 * NOTE: Modifications to rec_len based on synthesized
2542 * truncation points remove the guarantee that any extended
2543 * data on disk is zero (since the truncations may not have
2544 * taken place on-media yet).
a99b9ea2
MD		 2545 */
2546 if (ip->flags & HAMMER_INODE_TRUNCATED) {
2547 if (hammer_cursor_ondisk(&cursor) ||
2548 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
2549 if (ip->trunc_off <= rec_offset)
2550 rec_len = 0;
2551 else if (ip->trunc_off < rec_offset + rec_len)
2552 rec_len = (int)(ip->trunc_off - rec_offset);
2553 }
2554 }
2555 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2556 if (hammer_cursor_ondisk(&cursor)) {
2557 if (ip->sync_trunc_off <= rec_offset)
2558 rec_len = 0;
2559 else if (ip->sync_trunc_off < rec_offset + rec_len)
2560 rec_len = (int)(ip->sync_trunc_off - rec_offset);
2561 }
2562 }
2563
2564 /*
2565 * Accumulate information. If we have hit a discontiguous
2566 * block reset base_offset unless we are already beyond the
2567 * requested offset. If we are, that's it, we stop.
2568 */
a99b9ea2
MD		 2569 if (error)
2570 break;
1b0ab2c3
MD		 2571 if (hammer_cursor_ondisk(&cursor)) {
2572 disk_offset = cursor.leaf->data_offset;
2573 if (rec_offset != last_offset ||
2574 disk_offset != last_disk_offset) {
2575 if (rec_offset > ap->a_loffset)
2576 break;
2577 base_offset = rec_offset;
2578 base_disk_offset = disk_offset;
2579 }
2580 last_offset = rec_offset + rec_len;
2581 last_disk_offset = disk_offset + rec_len;
a99b9ea2 2582 }
a99b9ea2
MD		 2583 error = hammer_ip_next(&cursor);
2584 }
2585
2586#if 0
2587 kprintf("BMAP %016llx: %016llx - %016llx\n",
2588 ap->a_loffset, base_offset, last_offset);
2589 kprintf("BMAP %16s: %016llx - %016llx\n",
2590 "", base_disk_offset, last_disk_offset);
2591#endif
2592
cb51be26 2593 if (cursor.node) {
bcac4bbb 2594 hammer_cache_node(&ip->cache[1], cursor.node);
cb51be26
MD		 2595#if 0
2596 kprintf("bmap_end2 %016llx ip->cache %p\n", ap->a_loffset, ip->cache[1]);
2597#endif
2598 }
a99b9ea2
MD		 2599 hammer_done_cursor(&cursor);
2600 hammer_done_transaction(&trans);
2601
4a2796f3
MD		 2602 /*
2603 * If we couldn't find any records or the records we did find were
2604 * all behind the requested offset, return failure. A forward
2605 * truncation can leave a hole w/ no on-disk records.
2606 */
2607 if (last_offset == 0 || last_offset < ap->a_loffset)
2608 return (EOPNOTSUPP);
2609
2610 /*
2611 * Figure out the block size at the requested offset and adjust
2612 * our limits so the cluster_read() does not create inappropriately
2613 * sized buffer cache buffers.
2614 */
2615 blksize = hammer_blocksize(ap->a_loffset);
2616 if (hammer_blocksize(base_offset) != blksize) {
2617 base_offset = hammer_blockdemarc(base_offset, ap->a_loffset);
2618 }
2619 if (last_offset != ap->a_loffset &&
2620 hammer_blocksize(last_offset - 1) != blksize) {
2621 last_offset = hammer_blockdemarc(ap->a_loffset,
2622 last_offset - 1);
2623 }
2624
2625 /*
2626 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
2627 * from occuring.
2628 */
2629 disk_offset = base_disk_offset + (ap->a_loffset - base_offset);
2630
1b0ab2c3
MD		 2631 if ((disk_offset & HAMMER_OFF_ZONE_MASK) != HAMMER_ZONE_LARGE_DATA) {
2632 /*
2633 * Only large-data zones can be direct-IOd
2634 */
2635 error = EOPNOTSUPP;
2636 } else if ((disk_offset & HAMMER_BUFMASK) ||
2637 (last_offset - ap->a_loffset) < blksize) {
2638 /*
2639 * doffsetp is not aligned or the forward run size does
2640 * not cover a whole buffer, disallow the direct I/O.
2641 */
a99b9ea2
MD		 2642 error = EOPNOTSUPP;
2643 } else {
1b0ab2c3
MD		 2644 /*
2645 * We're good.
2646 */
4a2796f3
MD		 2647 *ap->a_doffsetp = disk_offset;
2648 if (ap->a_runb) {
2649 *ap->a_runb = ap->a_loffset - base_offset;
2650 KKASSERT(*ap->a_runb >= 0);
a99b9ea2 2651 }
4a2796f3
MD		 2652 if (ap->a_runp) {
2653 *ap->a_runp = last_offset - ap->a_loffset;
2654 KKASSERT(*ap->a_runp >= 0);
2655 }
2656 error = 0;
a99b9ea2
MD		 2657 }
2658 return(error);
2659}
2660
2661/*
059819e3 2662 * Write to a regular file. Because this is a strategy call the OS is
bcac4bbb 2663 * trying to actually get data onto the media.
8cd0a023
MD		 2664 */
2665static
2666int
2667hammer_vop_strategy_write(struct vop_strategy_args *ap)
2668{
47637bff 2669 hammer_record_t record;
af209b0f 2670 hammer_mount_t hmp;
8cd0a023
MD		 2671 hammer_inode_t ip;
2672 struct bio *bio;
2673 struct buf *bp;
a7e9bef1 2674 int blksize;
0832c9bb
MD		 2675 int bytes;
2676 int error;
8cd0a023
MD		 2677
2678 bio = ap->a_bio;
2679 bp = bio->bio_buf;
2680 ip = ap->a_vp->v_data;
af209b0f 2681 hmp = ip->hmp;
d113fda1 2682
a7e9bef1
MD		 2683 blksize = hammer_blocksize(bio->bio_offset);
2684 KKASSERT(bp->b_bufsize == blksize);
4a2796f3 2685
059819e3
MD		 2686 if (ip->flags & HAMMER_INODE_RO) {
2687 bp->b_error = EROFS;
2688 bp->b_flags |= B_ERROR;
2689 biodone(ap->a_bio);
2690 return(EROFS);
2691 }
b84de5af
MD		 2692
2693 /*
29ce0677
MD		 2694 * Interlock with inode destruction (no in-kernel or directory
2695 * topology visibility). If we queue new IO while trying to
2696 * destroy the inode we can deadlock the vtrunc call in
2697 * hammer_inode_unloadable_check().
35a49944
MD		 2698 *
2699 * Besides, there's no point flushing a bp associated with an
2700 * inode that is being destroyed on-media and has no kernel
2701 * references.
29ce0677 2702 */
35a49944
MD		 2703 if ((ip->flags | ip->sync_flags) &
2704 (HAMMER_INODE_DELETING|HAMMER_INODE_DELETED)) {
29ce0677
MD		 2705 bp->b_resid = 0;
2706 biodone(ap->a_bio);
2707 return(0);
2708 }
2709
2710 /*
a99b9ea2
MD		 2711 * Reserve space and issue a direct-write from the front-end.
2712 * NOTE: The direct_io code will hammer_bread/bcopy smaller
2713 * allocations.
47637bff 2714 *
a99b9ea2
MD		 2715 * An in-memory record will be installed to reference the storage
2716 * until the flusher can get to it.
47637bff
MD		 2717 *
2718 * Since we own the high level bio the front-end will not try to
0832c9bb 2719 * do a direct-read until the write completes.
a99b9ea2
MD		 2720 *
2721 * NOTE: The only time we do not reserve a full-sized buffers
2722 * worth of data is if the file is small. We do not try to
2723 * allocate a fragment (from the small-data zone) at the end of
2724 * an otherwise large file as this can lead to wildly separated
2725 * data.
47637bff 2726 */
0832c9bb
MD		 2727 KKASSERT((bio->bio_offset & HAMMER_BUFMASK) == 0);
2728 KKASSERT(bio->bio_offset < ip->ino_data.size);
a99b9ea2 2729 if (bio->bio_offset || ip->ino_data.size > HAMMER_BUFSIZE / 2)
4a2796f3 2730 bytes = bp->b_bufsize;
b84de5af 2731 else
a99b9ea2 2732 bytes = ((int)ip->ino_data.size + 15) & ~15;
0832c9bb
MD		 2733
2734 record = hammer_ip_add_bulk(ip, bio->bio_offset, bp->b_data,
2735 bytes, &error);
2736 if (record) {
1b0ab2c3 2737 hammer_io_direct_write(hmp, record, bio);
4a2796f3
MD		 2738 if (ip->rsv_recs > 1 && hmp->rsv_recs > hammer_limit_recs)
2739 hammer_flush_inode(ip, 0);
0832c9bb 2740 } else {
a99b9ea2 2741 bp->b_bio2.bio_offset = NOOFFSET;
0832c9bb
MD		 2742 bp->b_error = error;
2743 bp->b_flags |= B_ERROR;
2744 biodone(ap->a_bio);
2745 }
0832c9bb 2746 return(error);
059819e3
MD		 2747}
2748
2749/*
8cd0a023
MD		 2750 * dounlink - disconnect a directory entry
2751 *
2752 * XXX whiteout support not really in yet
2753 */
2754static int
b84de5af 2755hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
d7e278bb
MD		 2756 struct vnode *dvp, struct ucred *cred,
2757 int flags, int isdir)
8cd0a023 2758{
8cd0a023
MD		 2759 struct namecache *ncp;
2760 hammer_inode_t dip;
2761 hammer_inode_t ip;
8cd0a023 2762 struct hammer_cursor cursor;
8cd0a023 2763 int64_t namekey;
5e435c92 2764 u_int32_t max_iterations;
11ad5ade 2765 int nlen, error;
8cd0a023
MD		 2766
2767 /*
2768 * Calculate the namekey and setup the key range for the scan. This
2769 * works kinda like a chained hash table where the lower 32 bits
2770 * of the namekey synthesize the chain.
2771 *
2772 * The key range is inclusive of both key_beg and key_end.
2773 */
2774 dip = VTOI(dvp);
2775 ncp = nch->ncp;
d113fda1
MD		 2776
2777 if (dip->flags & HAMMER_INODE_RO)
2778 return (EROFS);
2779
5e435c92
MD		 2780 namekey = hammer_directory_namekey(dip, ncp->nc_name, ncp->nc_nlen,
2781 &max_iterations);
6a37e7e4 2782retry:
bcac4bbb 2783 hammer_init_cursor(trans, &cursor, &dip->cache[1], dip);
5a930e66
MD		 2784 cursor.key_beg.localization = dip->obj_localization +
2785 HAMMER_LOCALIZE_MISC;
8cd0a023
MD		 2786 cursor.key_beg.obj_id = dip->obj_id;
2787 cursor.key_beg.key = namekey;
d5530d22 2788 cursor.key_beg.create_tid = 0;
8cd0a023
MD		 2789 cursor.key_beg.delete_tid = 0;
2790 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2791 cursor.key_beg.obj_type = 0;
2792
2793 cursor.key_end = cursor.key_beg;
5e435c92 2794 cursor.key_end.key += max_iterations;
d5530d22
MD		 2795 cursor.asof = dip->obj_asof;
2796 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
8cd0a023 2797
8cd0a023
MD		 2798 /*
2799 * Scan all matching records (the chain), locate the one matching
2800 * the requested path component. info->last_error contains the
2801 * error code on search termination and could be 0, ENOENT, or
2802 * something else.
2803 *
2804 * The hammer_ip_*() functions merge in-memory records with on-disk
2805 * records for the purposes of the search.
2806 */
4e17f465
MD		 2807 error = hammer_ip_first(&cursor);
2808
a89aec1b
MD		 2809 while (error == 0) {
2810 error = hammer_ip_resolve_data(&cursor);
2811 if (error)
66325755 2812 break;
11ad5ade
MD		 2813 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2814 KKASSERT(nlen > 0);
2815 if (ncp->nc_nlen == nlen &&
2816 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
66325755
MD		 2817 break;
2818 }
a89aec1b 2819 error = hammer_ip_next(&cursor);
66325755 2820 }
8cd0a023
MD		 2821
2822 /*
2823 * If all is ok we have to get the inode so we can adjust nlinks.
269c5eab
MD		 2824 * To avoid a deadlock with the flusher we must release the inode
2825 * lock on the directory when acquiring the inode for the entry.
b3deaf57
MD		 2826 *
2827 * If the target is a directory, it must be empty.
8cd0a023 2828 */
66325755 2829 if (error == 0) {
269c5eab 2830 hammer_unlock(&cursor.ip->lock);
bcac4bbb 2831 ip = hammer_get_inode(trans, dip, cursor.data->entry.obj_id,
ddfdf542
MD		 2832 dip->hmp->asof,
2833 cursor.data->entry.localization,
2834 0, &error);
269c5eab 2835 hammer_lock_sh(&cursor.ip->lock);
46fe7ae1 2836 if (error == ENOENT) {
4c286c36
MD		 2837 kprintf("HAMMER: WARNING: Removing "
2838 "dirent w/missing inode \"%s\"\n"
2839 "\tobj_id = %016llx\n",
2840 ncp->nc_name,
2841 (long long)cursor.data->entry.obj_id);
2842 error = 0;
46fe7ae1 2843 }
1f07f686
MD		 2844
2845 /*
d7e278bb
MD		 2846 * If isdir >= 0 we validate that the entry is or is not a
2847 * directory. If isdir < 0 we don't care.
2848 */
4c286c36 2849 if (error == 0 && isdir >= 0 && ip) {
d7e278bb
MD		 2850 if (isdir &&
2851 ip->ino_data.obj_type != HAMMER_OBJTYPE_DIRECTORY) {
2852 error = ENOTDIR;
2853 } else if (isdir == 0 &&
2854 ip->ino_data.obj_type == HAMMER_OBJTYPE_DIRECTORY) {
2855 error = EISDIR;
2856 }
2857 }
2858
2859 /*
1f07f686
MD		 2860 * If we are trying to remove a directory the directory must
2861 * be empty.
2862 *
3f9b4cfa
MD		 2863 * The check directory code can loop and deadlock/retry. Our
2864 * own cursor's node locks must be released to avoid a 3-way
2865 * deadlock with the flusher if the check directory code
2866 * blocks.
2867 *
2868 * If any changes whatsoever have been made to the cursor
2869 * set EDEADLK and retry.
1f07f686 2870 */
4c286c36
MD		 2871 if (error == 0 && ip && ip->ino_data.obj_type ==
2872 HAMMER_OBJTYPE_DIRECTORY) {
3f9b4cfa 2873 hammer_unlock_cursor(&cursor);
98f7132d 2874 error = hammer_ip_check_directory_empty(trans, ip);
3f9b4cfa
MD		 2875 hammer_lock_cursor(&cursor);
2876 if (cursor.flags & HAMMER_CURSOR_RETEST) {
2877 kprintf("HAMMER: Warning: avoided deadlock "
2878 "on rmdir '%s'\n",
2879 ncp->nc_name);
2880 error = EDEADLK;
2881 }
b3deaf57 2882 }
1f07f686 2883
6a37e7e4 2884 /*
1f07f686
MD		 2885 * Delete the directory entry.
2886 *
6a37e7e4 2887 * WARNING: hammer_ip_del_directory() may have to terminate
1f07f686 2888 * the cursor to avoid a deadlock. It is ok to call
6a37e7e4
MD		 2889 * hammer_done_cursor() twice.
2890 */
b84de5af 2891 if (error == 0) {
b84de5af
MD		 2892 error = hammer_ip_del_directory(trans, &cursor,
2893 dip, ip);
b84de5af 2894 }
269c5eab 2895 hammer_done_cursor(&cursor);
8cd0a023
MD		 2896 if (error == 0) {
2897 cache_setunresolved(nch);
2898 cache_setvp(nch, NULL);
2899 /* XXX locking */
4c286c36 2900 if (ip && ip->vp) {
fbb84158 2901 hammer_knote(ip->vp, NOTE_DELETE);
8cd0a023 2902 cache_inval_vp(ip->vp, CINV_DESTROY);
fbb84158 2903 }
8cd0a023 2904 }
af209b0f
MD		 2905 if (ip)
2906 hammer_rel_inode(ip, 0);
269c5eab
MD		 2907 } else {
2908 hammer_done_cursor(&cursor);
66325755 2909 }
6a37e7e4
MD		 2910 if (error == EDEADLK)
2911 goto retry;
9c448776 2912
66325755 2913 return (error);
66325755
MD		 2914}
2915
7a04d74f
MD		 2916/************************************************************************
2917 * FIFO AND SPECFS OPS *
2918 ************************************************************************
2919 *
2920 */
2921
2922static int
2923hammer_vop_fifoclose (struct vop_close_args *ap)
2924{
2925 /* XXX update itimes */
2926 return (VOCALL(&fifo_vnode_vops, &ap->a_head));
2927}
2928
2929static int
2930hammer_vop_fiforead (struct vop_read_args *ap)
2931{
2932 int error;
2933
2934 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2935 /* XXX update access time */
2936 return (error);
2937}
2938
2939static int
2940hammer_vop_fifowrite (struct vop_write_args *ap)
2941{
2942 int error;
2943
2944 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2945 /* XXX update access time */
2946 return (error);
2947}
2948
fbb84158
MD		 2949static
2950int
2951hammer_vop_fifokqfilter(struct vop_kqfilter_args *ap)
2952{
2953 int error;
2954
2955 error = VOCALL(&fifo_vnode_vops, &ap->a_head);
2956 if (error)
2957 error = hammer_vop_kqfilter(ap);
2958 return(error);
2959}
2960
7a04d74f
MD		 2961static int
2962hammer_vop_specclose (struct vop_close_args *ap)
2963{
2964 /* XXX update itimes */
2965 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2966}
2967
2968static int
2969hammer_vop_specread (struct vop_read_args *ap)
2970{
2971 /* XXX update access time */
2972 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2973}
2974
2975static int
2976hammer_vop_specwrite (struct vop_write_args *ap)
2977{
2978 /* XXX update last change time */
2979 return (VOCALL(&spec_vnode_vops, &ap->a_head));
2980}
2981
fbb84158
MD		 2982/************************************************************************
2983 * KQFILTER OPS *
2984 ************************************************************************
2985 *
2986 */
2987static void filt_hammerdetach(struct knote *kn);
2988static int filt_hammerread(struct knote *kn, long hint);
2989static int filt_hammerwrite(struct knote *kn, long hint);
2990static int filt_hammervnode(struct knote *kn, long hint);
2991
2992static struct filterops hammerread_filtops =
2993 { 1, NULL, filt_hammerdetach, filt_hammerread };
2994static struct filterops hammerwrite_filtops =
2995 { 1, NULL, filt_hammerdetach, filt_hammerwrite };
2996static struct filterops hammervnode_filtops =
2997 { 1, NULL, filt_hammerdetach, filt_hammervnode };
2998
2999static
3000int
3001hammer_vop_kqfilter(struct vop_kqfilter_args *ap)
3002{
3003 struct vnode *vp = ap->a_vp;
3004 struct knote *kn = ap->a_kn;
3005 lwkt_tokref ilock;
3006
3007 switch (kn->kn_filter) {
3008 case EVFILT_READ:
3009 kn->kn_fop = &hammerread_filtops;
3010 break;
3011 case EVFILT_WRITE:
3012 kn->kn_fop = &hammerwrite_filtops;
3013 break;
3014 case EVFILT_VNODE:
3015 kn->kn_fop = &hammervnode_filtops;
3016 break;
3017 default:
3018 return (1);
3019 }
3020
3021 kn->kn_hook = (caddr_t)vp;
3022
3023 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
3024 SLIST_INSERT_HEAD(&vp->v_pollinfo.vpi_selinfo.si_note, kn, kn_selnext);
3025 lwkt_reltoken(&ilock);
3026
3027 return(0);
3028}
3029
3030static void
3031filt_hammerdetach(struct knote *kn)
3032{
3033 struct vnode *vp = (void *)kn->kn_hook;
3034 lwkt_tokref ilock;
3035
3036 lwkt_gettoken(&ilock, &vp->v_pollinfo.vpi_token);
3037 SLIST_REMOVE(&vp->v_pollinfo.vpi_selinfo.si_note,
3038 kn, knote, kn_selnext);
3039 lwkt_reltoken(&ilock);
3040}
3041
3042static int
3043filt_hammerread(struct knote *kn, long hint)
3044{
3045 struct vnode *vp = (void *)kn->kn_hook;
3046 hammer_inode_t ip = VTOI(vp);
3047
3048 if (hint == NOTE_REVOKE) {
3049 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
3050 return(1);
3051 }
3052 kn->kn_data = ip->ino_data.size - kn->kn_fp->f_offset;
3053 return (kn->kn_data != 0);
3054}
3055
3056static int
3057filt_hammerwrite(struct knote *kn, long hint)
3058{
3059 if (hint == NOTE_REVOKE)
3060 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
3061 kn->kn_data = 0;
3062 return (1);
3063}
3064
3065static int
3066filt_hammervnode(struct knote *kn, long hint)
3067{
3068 if (kn->kn_sfflags & hint)
3069 kn->kn_fflags |= hint;
3070 if (hint == NOTE_REVOKE) {
3071 kn->kn_flags |= EV_EOF;
3072 return (1);
3073 }
3074 return (kn->kn_fflags != 0);
3075}
3076
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