HAMMER VFS - Only set B_CLUSTEROK on 64K buffers
[dragonfly.git] / sys / vfs / hammer / hammer_vnops.c
CommitLineData
427e5fc6 1/*
b84de5af 2 * Copyright (c) 2007-2008 The DragonFly Project. All rights reserved.
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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
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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>
18bee4a2 49#include <vm/swap_pager.h>
7a04d74f 50#include <vfs/fifofs/fifo.h>
684a93c4 51
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52#include "hammer.h"
53
54/*
55 * USERFS VNOPS
56 */
57/*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
66325755
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58static int hammer_vop_fsync(struct vop_fsync_args *);
59static int hammer_vop_read(struct vop_read_args *);
60static int hammer_vop_write(struct vop_write_args *);
61static int hammer_vop_access(struct vop_access_args *);
62static int hammer_vop_advlock(struct vop_advlock_args *);
63static int hammer_vop_close(struct vop_close_args *);
64static int hammer_vop_ncreate(struct vop_ncreate_args *);
65static int hammer_vop_getattr(struct vop_getattr_args *);
66static int hammer_vop_nresolve(struct vop_nresolve_args *);
67static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
68static int hammer_vop_nlink(struct vop_nlink_args *);
69static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
70static int hammer_vop_nmknod(struct vop_nmknod_args *);
71static int hammer_vop_open(struct vop_open_args *);
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72static int hammer_vop_print(struct vop_print_args *);
73static int hammer_vop_readdir(struct vop_readdir_args *);
74static int hammer_vop_readlink(struct vop_readlink_args *);
75static int hammer_vop_nremove(struct vop_nremove_args *);
76static int hammer_vop_nrename(struct vop_nrename_args *);
77static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
349433c9 78static int hammer_vop_markatime(struct vop_markatime_args *);
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79static int hammer_vop_setattr(struct vop_setattr_args *);
80static int hammer_vop_strategy(struct vop_strategy_args *);
a99b9ea2 81static int hammer_vop_bmap(struct vop_bmap_args *ap);
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82static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
83static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
7dc57964 84static int hammer_vop_ioctl(struct vop_ioctl_args *);
513ca7d7 85static int hammer_vop_mountctl(struct vop_mountctl_args *);
fbb84158 86static int hammer_vop_kqfilter (struct vop_kqfilter_args *);
427e5fc6 87
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88static int hammer_vop_fifoclose (struct vop_close_args *);
89static int hammer_vop_fiforead (struct vop_read_args *);
90static int hammer_vop_fifowrite (struct vop_write_args *);
fbb84158 91static int hammer_vop_fifokqfilter (struct vop_kqfilter_args *);
7a04d74f 92
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93struct vop_ops hammer_vnode_vops = {
94 .vop_default = vop_defaultop,
95 .vop_fsync = hammer_vop_fsync,
c0ade690
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96 .vop_getpages = vop_stdgetpages,
97 .vop_putpages = vop_stdputpages,
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98 .vop_read = hammer_vop_read,
99 .vop_write = hammer_vop_write,
100 .vop_access = hammer_vop_access,
101 .vop_advlock = hammer_vop_advlock,
102 .vop_close = hammer_vop_close,
103 .vop_ncreate = hammer_vop_ncreate,
104 .vop_getattr = hammer_vop_getattr,
105 .vop_inactive = hammer_vop_inactive,
106 .vop_reclaim = hammer_vop_reclaim,
107 .vop_nresolve = hammer_vop_nresolve,
108 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
109 .vop_nlink = hammer_vop_nlink,
110 .vop_nmkdir = hammer_vop_nmkdir,
111 .vop_nmknod = hammer_vop_nmknod,
112 .vop_open = hammer_vop_open,
64950f31 113 .vop_pathconf = vop_stdpathconf,
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114 .vop_print = hammer_vop_print,
115 .vop_readdir = hammer_vop_readdir,
116 .vop_readlink = hammer_vop_readlink,
117 .vop_nremove = hammer_vop_nremove,
118 .vop_nrename = hammer_vop_nrename,
119 .vop_nrmdir = hammer_vop_nrmdir,
349433c9 120 .vop_markatime = hammer_vop_markatime,
427e5fc6 121 .vop_setattr = hammer_vop_setattr,
a99b9ea2 122 .vop_bmap = hammer_vop_bmap,
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123 .vop_strategy = hammer_vop_strategy,
124 .vop_nsymlink = hammer_vop_nsymlink,
7dc57964 125 .vop_nwhiteout = hammer_vop_nwhiteout,
513ca7d7 126 .vop_ioctl = hammer_vop_ioctl,
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127 .vop_mountctl = hammer_vop_mountctl,
128 .vop_kqfilter = hammer_vop_kqfilter
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129};
130
7a04d74f 131struct vop_ops hammer_spec_vops = {
8be7edad 132 .vop_default = vop_defaultop,
7a04d74f 133 .vop_fsync = hammer_vop_fsync,
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134 .vop_read = vop_stdnoread,
135 .vop_write = vop_stdnowrite,
7a04d74f 136 .vop_access = hammer_vop_access,
8be7edad 137 .vop_close = hammer_vop_close,
349433c9 138 .vop_markatime = hammer_vop_markatime,
8be7edad 139 .vop_getattr = hammer_vop_getattr,
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140 .vop_inactive = hammer_vop_inactive,
141 .vop_reclaim = hammer_vop_reclaim,
142 .vop_setattr = hammer_vop_setattr
143};
144
145struct vop_ops hammer_fifo_vops = {
146 .vop_default = fifo_vnoperate,
147 .vop_fsync = hammer_vop_fsync,
148 .vop_read = hammer_vop_fiforead,
149 .vop_write = hammer_vop_fifowrite,
150 .vop_access = hammer_vop_access,
151 .vop_close = hammer_vop_fifoclose,
349433c9 152 .vop_markatime = hammer_vop_markatime,
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153 .vop_getattr = hammer_vop_getattr,
154 .vop_inactive = hammer_vop_inactive,
155 .vop_reclaim = hammer_vop_reclaim,
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156 .vop_setattr = hammer_vop_setattr,
157 .vop_kqfilter = hammer_vop_fifokqfilter
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158};
159
fbb84158
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160static __inline
161void
162hammer_knote(struct vnode *vp, int flags)
163{
164 if (flags)
5b22f1a7 165 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
fbb84158
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166}
167
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168#ifdef DEBUG_TRUNCATE
169struct hammer_inode *HammerTruncIp;
170#endif
171
b84de5af 172static int hammer_dounlink(hammer_transaction_t trans, struct nchandle *nch,
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173 struct vnode *dvp, struct ucred *cred,
174 int flags, int isdir);
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175static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
176static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
177
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178#if 0
179static
180int
181hammer_vop_vnoperate(struct vop_generic_args *)
182{
183 return (VOCALL(&hammer_vnode_vops, ap));
184}
185#endif
186
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187/*
188 * hammer_vop_fsync { vp, waitfor }
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189 *
190 * fsync() an inode to disk and wait for it to be completely committed
191 * such that the information would not be undone if a crash occured after
192 * return.
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193 *
194 * NOTE: HAMMER's fsync()'s are going to remain expensive until we implement
195 * a REDO log. A sysctl is provided to relax HAMMER's fsync()
196 * operation.
197 *
198 * Ultimately the combination of a REDO log and use of fast storage
199 * to front-end cluster caches will make fsync fast, but it aint
200 * here yet. And, in anycase, we need real transactional
201 * all-or-nothing features which are not restricted to a single file.
66325755 202 */
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203static
204int
66325755 205hammer_vop_fsync(struct vop_fsync_args *ap)
427e5fc6 206{
b84de5af 207 hammer_inode_t ip = VTOI(ap->a_vp);
9192654c 208 hammer_mount_t hmp = ip->hmp;
6f3d87c0 209 int waitfor = ap->a_waitfor;
9192654c 210 int mode;
6f3d87c0 211
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212 lwkt_gettoken(&hmp->fs_token);
213
6f3d87c0 214 /*
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215 * Fsync rule relaxation (default is either full synchronous flush
216 * or REDO semantics with synchronous flush).
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217 */
218 if (ap->a_flags & VOP_FSYNC_SYSCALL) {
219 switch(hammer_fsync_mode) {
220 case 0:
9192654c 221mode0:
47f363f1 222 /* no REDO, full synchronous flush */
9192654c 223 goto skip;
6f3d87c0 224 case 1:
9192654c 225mode1:
47f363f1 226 /* no REDO, full asynchronous flush */
6f3d87c0
MD
227 if (waitfor == MNT_WAIT)
228 waitfor = MNT_NOWAIT;
9192654c 229 goto skip;
6f3d87c0 230 case 2:
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MD
231 /* REDO semantics, synchronous flush */
232 if (hmp->version < HAMMER_VOL_VERSION_FOUR)
233 goto mode0;
234 mode = HAMMER_FLUSH_UNDOS_AUTO;
235 break;
6f3d87c0 236 case 3:
9192654c
MD
237 /* REDO semantics, relaxed asynchronous flush */
238 if (hmp->version < HAMMER_VOL_VERSION_FOUR)
239 goto mode1;
240 mode = HAMMER_FLUSH_UNDOS_RELAXED;
241 if (waitfor == MNT_WAIT)
242 waitfor = MNT_NOWAIT;
243 break;
244 case 4:
245 /* ignore the fsync() system call */
b0aab9b9 246 lwkt_reltoken(&hmp->fs_token);
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247 return(0);
248 default:
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249 /* we have to do something */
250 mode = HAMMER_FLUSH_UNDOS_RELAXED;
251 if (waitfor == MNT_WAIT)
252 waitfor = MNT_NOWAIT;
253 break;
254 }
255
256 /*
47f363f1
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257 * Fast fsync only needs to flush the UNDO/REDO fifo if
258 * HAMMER_INODE_REDO is non-zero and the only modifications
259 * made to the file are write or write-extends.
9192654c 260 */
47f363f1 261 if ((ip->flags & HAMMER_INODE_REDO) &&
9192654c
MD
262 (ip->flags & HAMMER_INODE_MODMASK_NOREDO) == 0
263 ) {
264 ++hammer_count_fsyncs;
265 hammer_flusher_flush_undos(hmp, mode);
266 ip->redo_count = 0;
b0aab9b9 267 lwkt_reltoken(&hmp->fs_token);
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268 return(0);
269 }
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270
271 /*
272 * REDO is enabled by fsync(), the idea being we really only
273 * want to lay down REDO records when programs are using
274 * fsync() heavily. The first fsync() on the file starts
275 * the gravy train going and later fsync()s keep it hot by
276 * resetting the redo_count.
277 *
278 * We weren't running REDOs before now so we have to fall
279 * through and do a full fsync of what we have.
280 */
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281 if (hmp->version >= HAMMER_VOL_VERSION_FOUR &&
282 (hmp->flags & HAMMER_MOUNT_REDO_RECOVERY_RUN) == 0) {
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283 ip->flags |= HAMMER_INODE_REDO;
284 ip->redo_count = 0;
285 }
6f3d87c0 286 }
9192654c 287skip:
c0ade690 288
6f3d87c0 289 /*
9192654c 290 * Do a full flush sequence.
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MD
291 *
292 * Attempt to release the vnode while waiting for the inode to
293 * finish flushing. This can really mess up inactive->reclaim
294 * sequences so only do it if the vnode is active.
6f3d87c0 295 */
7a61b85d 296 ++hammer_count_fsyncs;
6f3d87c0 297 vfsync(ap->a_vp, waitfor, 1, NULL, NULL);
af209b0f 298 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
6f3d87c0 299 if (waitfor == MNT_WAIT) {
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MD
300 if ((ap->a_vp->v_flag & VINACTIVE) == 0)
301 vn_unlock(ap->a_vp);
b84de5af 302 hammer_wait_inode(ip);
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303 if ((ap->a_vp->v_flag & VINACTIVE) == 0)
304 vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY);
b424ca30 305 }
b0aab9b9 306 lwkt_reltoken(&hmp->fs_token);
059819e3 307 return (ip->error);
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308}
309
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310/*
311 * hammer_vop_read { vp, uio, ioflag, cred }
42cd5131 312 *
b0aab9b9 313 * MPSAFE (for the cache safe does not require fs_token)
66325755 314 */
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315static
316int
66325755 317hammer_vop_read(struct vop_read_args *ap)
427e5fc6 318{
66325755 319 struct hammer_transaction trans;
c0ade690 320 hammer_inode_t ip;
b0aab9b9 321 hammer_mount_t hmp;
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322 off_t offset;
323 struct buf *bp;
324 struct uio *uio;
325 int error;
326 int n;
8cd0a023 327 int seqcount;
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328 int ioseqcount;
329 int blksize;
f864373f 330 int bigread;
b0aab9b9 331 int got_fstoken;
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332
333 if (ap->a_vp->v_type != VREG)
334 return (EINVAL);
335 ip = VTOI(ap->a_vp);
b0aab9b9 336 hmp = ip->hmp;
66325755 337 error = 0;
4a2796f3
MD
338 uio = ap->a_uio;
339
340 /*
341 * Allow the UIO's size to override the sequential heuristic.
342 */
343 blksize = hammer_blocksize(uio->uio_offset);
69adbed4
MD
344 seqcount = (uio->uio_resid + (BKVASIZE - 1)) / BKVASIZE;
345 ioseqcount = (ap->a_ioflag >> 16);
4a2796f3
MD
346 if (seqcount < ioseqcount)
347 seqcount = ioseqcount;
66325755 348
7ff770b4 349 /*
f864373f
MD
350 * If reading or writing a huge amount of data we have to break
351 * atomicy and allow the operation to be interrupted by a signal
352 * or it can DOS the machine.
353 */
354 bigread = (uio->uio_resid > 100 * 1024 * 1024);
b0aab9b9 355 got_fstoken = 0;
f864373f
MD
356
357 /*
4a2796f3
MD
358 * Access the data typically in HAMMER_BUFSIZE blocks via the
359 * buffer cache, but HAMMER may use a variable block size based
360 * on the offset.
42cd5131
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361 *
362 * XXX Temporary hack, delay the start transaction while we remain
363 * MPSAFE. NOTE: ino_data.size cannot change while vnode is
364 * locked-shared.
66325755 365 */
11ad5ade 366 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_data.size) {
4a2796f3
MD
367 int64_t base_offset;
368 int64_t file_limit;
369
370 blksize = hammer_blocksize(uio->uio_offset);
371 offset = (int)uio->uio_offset & (blksize - 1);
372 base_offset = uio->uio_offset - offset;
373
f864373f
MD
374 if (bigread && (error = hammer_signal_check(ip->hmp)) != 0)
375 break;
376
42cd5131
MD
377 /*
378 * MPSAFE
379 */
54341a3b
MD
380 bp = getblk(ap->a_vp, base_offset, blksize, 0, 0);
381 if ((bp->b_flags & (B_INVAL | B_CACHE | B_RAM)) == B_CACHE) {
382 bp->b_flags &= ~B_AGE;
42cd5131
MD
383 error = 0;
384 goto skip;
54341a3b
MD
385 }
386 if (ap->a_ioflag & IO_NRDELAY) {
387 bqrelse(bp);
388 return (EWOULDBLOCK);
42cd5131
MD
389 }
390
391 /*
392 * MPUNSAFE
393 */
b0aab9b9
MD
394 if (got_fstoken == 0) {
395 lwkt_gettoken(&hmp->fs_token);
396 got_fstoken = 1;
42cd5131
MD
397 hammer_start_transaction(&trans, ip->hmp);
398 }
399
54341a3b
MD
400 /*
401 * NOTE: A valid bp has already been acquired, but was not
402 * B_CACHE.
403 */
1b0ab2c3 404 if (hammer_cluster_enable) {
4a2796f3
MD
405 /*
406 * Use file_limit to prevent cluster_read() from
407 * creating buffers of the wrong block size past
408 * the demarc.
409 */
410 file_limit = ip->ino_data.size;
411 if (base_offset < HAMMER_XDEMARC &&
412 file_limit > HAMMER_XDEMARC) {
413 file_limit = HAMMER_XDEMARC;
414 }
54341a3b 415 error = cluster_readx(ap->a_vp,
4a2796f3 416 file_limit, base_offset,
364c022c
MD
417 blksize, uio->uio_resid,
418 seqcount * BKVASIZE, &bp);
a99b9ea2 419 } else {
54341a3b
MD
420 error = breadnx(ap->a_vp, base_offset, blksize,
421 NULL, NULL, 0, &bp);
a99b9ea2 422 }
66325755
MD
423 if (error) {
424 brelse(bp);
425 break;
426 }
42cd5131 427skip:
24c8374a
MD
428 if ((hammer_debug_io & 0x0001) && (bp->b_flags & B_IODEBUG)) {
429 kprintf("doff %016jx read file %016jx@%016jx\n",
430 (intmax_t)bp->b_bio2.bio_offset,
431 (intmax_t)ip->obj_id,
432 (intmax_t)bp->b_loffset);
433 }
434 bp->b_flags &= ~B_IODEBUG;
66030e2b
MD
435 if (blksize == HAMMER_XBUFSIZE)
436 bp->b_flags |= B_CLUSTEROK;
7bc5b8c2 437
4a2796f3 438 n = blksize - offset;
66325755
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439 if (n > uio->uio_resid)
440 n = uio->uio_resid;
11ad5ade
MD
441 if (n > ip->ino_data.size - uio->uio_offset)
442 n = (int)(ip->ino_data.size - uio->uio_offset);
df01a101
MD
443 if (got_fstoken)
444 lwkt_reltoken(&hmp->fs_token);
283b9448
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445
446 /*
447 * Set B_AGE, data has a lower priority than meta-data.
448 *
449 * Use a hold/unlock/drop sequence to run the uiomove
450 * with the buffer unlocked, avoiding deadlocks against
451 * read()s on mmap()'d spaces.
452 */
453 bp->b_flags |= B_AGE;
454 bqhold(bp);
455 bqrelse(bp);
66325755 456 error = uiomove((char *)bp->b_data + offset, n, uio);
283b9448
MD
457 bqdrop(bp);
458
df01a101
MD
459 if (got_fstoken)
460 lwkt_gettoken(&hmp->fs_token);
7bc5b8c2 461
af209b0f
MD
462 if (error)
463 break;
ce0138a6 464 hammer_stats_file_read += n;
66325755 465 }
42cd5131
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466
467 /*
70125e78
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468 * Try to update the atime with just the inode lock for maximum
469 * concurrency. If we can't shortcut it we have to get the full
470 * blown transaction.
42cd5131 471 */
70125e78
MD
472 if (got_fstoken == 0 && hammer_update_atime_quick(ip) < 0) {
473 lwkt_gettoken(&hmp->fs_token);
474 got_fstoken = 1;
475 hammer_start_transaction(&trans, ip->hmp);
476 }
477
b0aab9b9 478 if (got_fstoken) {
42cd5131
MD
479 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
480 (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
481 ip->ino_data.atime = trans.time;
e98f1b96 482 hammer_modify_inode(&trans, ip, HAMMER_INODE_ATIME);
42cd5131
MD
483 }
484 hammer_done_transaction(&trans);
b0aab9b9 485 lwkt_reltoken(&hmp->fs_token);
b84de5af 486 }
66325755 487 return (error);
427e5fc6
MD
488}
489
66325755
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490/*
491 * hammer_vop_write { vp, uio, ioflag, cred }
492 */
427e5fc6
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493static
494int
66325755 495hammer_vop_write(struct vop_write_args *ap)
427e5fc6 496{
66325755
MD
497 struct hammer_transaction trans;
498 struct hammer_inode *ip;
4a2796f3 499 hammer_mount_t hmp;
1589191a 500 thread_t td;
66325755 501 struct uio *uio;
4a2796f3 502 int offset;
47637bff 503 off_t base_offset;
9de13b88 504 int64_t cluster_eof;
66325755 505 struct buf *bp;
fbb84158 506 int kflags;
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507 int error;
508 int n;
c0ade690 509 int flags;
cb51be26 510 int seqcount;
f864373f 511 int bigwrite;
66325755
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512
513 if (ap->a_vp->v_type != VREG)
514 return (EINVAL);
515 ip = VTOI(ap->a_vp);
4a2796f3 516 hmp = ip->hmp;
66325755 517 error = 0;
fbb84158 518 kflags = 0;
cb51be26 519 seqcount = ap->a_ioflag >> 16;
66325755 520
d113fda1
MD
521 if (ip->flags & HAMMER_INODE_RO)
522 return (EROFS);
523
66325755
MD
524 /*
525 * Create a transaction to cover the operations we perform.
526 */
b0aab9b9 527 lwkt_gettoken(&hmp->fs_token);
4a2796f3 528 hammer_start_transaction(&trans, hmp);
66325755
MD
529 uio = ap->a_uio;
530
531 /*
532 * Check append mode
533 */
534 if (ap->a_ioflag & IO_APPEND)
11ad5ade 535 uio->uio_offset = ip->ino_data.size;
66325755
MD
536
537 /*
af209b0f
MD
538 * Check for illegal write offsets. Valid range is 0...2^63-1.
539 *
540 * NOTE: the base_off assignment is required to work around what
541 * I consider to be a GCC-4 optimization bug.
66325755 542 */
af209b0f
MD
543 if (uio->uio_offset < 0) {
544 hammer_done_transaction(&trans);
b0aab9b9 545 lwkt_reltoken(&hmp->fs_token);
af209b0f
MD
546 return (EFBIG);
547 }
548 base_offset = uio->uio_offset + uio->uio_resid; /* work around gcc-4 */
e54488bb 549 if (uio->uio_resid > 0 && base_offset <= uio->uio_offset) {
b84de5af 550 hammer_done_transaction(&trans);
b0aab9b9 551 lwkt_reltoken(&hmp->fs_token);
66325755 552 return (EFBIG);
9c448776 553 }
66325755 554
1589191a
MD
555 if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
556 base_offset > td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
557 hammer_done_transaction(&trans);
558 lwkt_reltoken(&hmp->fs_token);
559 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
560 return (EFBIG);
561 }
562
66325755 563 /*
f864373f
MD
564 * If reading or writing a huge amount of data we have to break
565 * atomicy and allow the operation to be interrupted by a signal
566 * or it can DOS the machine.
9192654c 567 *
47f363f1
MD
568 * Preset redo_count so we stop generating REDOs earlier if the
569 * limit is exceeded.
f864373f
MD
570 */
571 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
47f363f1
MD
572 if ((ip->flags & HAMMER_INODE_REDO) &&
573 ip->redo_count < hammer_limit_redo) {
9192654c 574 ip->redo_count += uio->uio_resid;
47f363f1 575 }
f864373f
MD
576
577 /*
4a2796f3
MD
578 * Access the data typically in HAMMER_BUFSIZE blocks via the
579 * buffer cache, but HAMMER may use a variable block size based
580 * on the offset.
66325755
MD
581 */
582 while (uio->uio_resid > 0) {
d5ef456e 583 int fixsize = 0;
4a2796f3
MD
584 int blksize;
585 int blkmask;
6362a262 586 int trivial;
d1eff1f7 587 int endofblk;
6362a262 588 off_t nsize;
d5ef456e 589
93291532 590 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_WRITE)) != 0)
e63644f0 591 break;
f864373f
MD
592 if (bigwrite && (error = hammer_signal_check(hmp)) != 0)
593 break;
e63644f0 594
a9d52b76
MD
595 blksize = hammer_blocksize(uio->uio_offset);
596
059819e3 597 /*
4a2796f3
MD
598 * Do not allow HAMMER to blow out the buffer cache. Very
599 * large UIOs can lockout other processes due to bwillwrite()
600 * mechanics.
47637bff 601 *
df301614
MD
602 * The hammer inode is not locked during these operations.
603 * The vnode is locked which can interfere with the pageout
604 * daemon for non-UIO_NOCOPY writes but should not interfere
605 * with the buffer cache. Even so, we cannot afford to
606 * allow the pageout daemon to build up too many dirty buffer
607 * cache buffers.
cb63d1bc
MD
608 *
609 * Only call this if we aren't being recursively called from
610 * a virtual disk device (vn), else we may deadlock.
df301614 611 */
cb63d1bc
MD
612 if ((ap->a_ioflag & IO_RECURSE) == 0)
613 bwillwrite(blksize);
df301614
MD
614
615 /*
de996e86
MD
616 * Control the number of pending records associated with
617 * this inode. If too many have accumulated start a
618 * flush. Try to maintain a pipeline with the flusher.
a117fbeb
MD
619 *
620 * NOTE: It is possible for other sources to grow the
621 * records but not necessarily issue another flush,
622 * so use a timeout and ensure that a re-flush occurs.
de996e86
MD
623 */
624 if (ip->rsv_recs >= hammer_limit_inode_recs) {
625 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
a117fbeb
MD
626 while (ip->rsv_recs >= hammer_limit_inode_recs * 2) {
627 ip->flags |= HAMMER_INODE_RECSW;
de996e86 628 tsleep(&ip->rsv_recs, 0, "hmrwww", hz);
a117fbeb 629 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
de996e86 630 }
de996e86
MD
631 }
632
633#if 0
634 /*
e4a5ff06
MD
635 * Do not allow HAMMER to blow out system memory by
636 * accumulating too many records. Records are so well
637 * decoupled from the buffer cache that it is possible
638 * for userland to push data out to the media via
639 * direct-write, but build up the records queued to the
640 * backend faster then the backend can flush them out.
641 * HAMMER has hit its write limit but the frontend has
642 * no pushback to slow it down.
059819e3 643 */
df301614 644 if (hmp->rsv_recs > hammer_limit_recs / 2) {
4a2796f3 645 /*
df301614 646 * Get the inode on the flush list
4a2796f3 647 */
df301614
MD
648 if (ip->rsv_recs >= 64)
649 hammer_flush_inode(ip, HAMMER_FLUSH_SIGNAL);
650 else if (ip->rsv_recs >= 16)
651 hammer_flush_inode(ip, 0);
4a2796f3
MD
652
653 /*
df301614
MD
654 * Keep the flusher going if the system keeps
655 * queueing records.
4a2796f3 656 */
df301614
MD
657 delta = hmp->count_newrecords -
658 hmp->last_newrecords;
659 if (delta < 0 || delta > hammer_limit_recs / 2) {
660 hmp->last_newrecords = hmp->count_newrecords;
661 hammer_sync_hmp(hmp, MNT_NOWAIT);
4a2796f3
MD
662 }
663
df301614
MD
664 /*
665 * If we have gotten behind start slowing
666 * down the writers.
667 */
668 delta = (hmp->rsv_recs - hammer_limit_recs) *
669 hz / hammer_limit_recs;
670 if (delta > 0)
671 tsleep(&trans, 0, "hmrslo", delta);
059819e3 672 }
de996e86 673#endif
059819e3 674
4a2796f3
MD
675 /*
676 * Calculate the blocksize at the current offset and figure
677 * out how much we can actually write.
678 */
4a2796f3
MD
679 blkmask = blksize - 1;
680 offset = (int)uio->uio_offset & blkmask;
681 base_offset = uio->uio_offset & ~(int64_t)blkmask;
682 n = blksize - offset;
d1eff1f7 683 if (n > uio->uio_resid) {
d5ef456e 684 n = uio->uio_resid;
d1eff1f7
MD
685 endofblk = 0;
686 } else {
687 endofblk = 1;
688 }
6362a262
MD
689 nsize = uio->uio_offset + n;
690 if (nsize > ip->ino_data.size) {
691 if (uio->uio_offset > ip->ino_data.size)
692 trivial = 0;
693 else
694 trivial = 1;
695 nvextendbuf(ap->a_vp,
696 ip->ino_data.size,
697 nsize,
698 hammer_blocksize(ip->ino_data.size),
699 hammer_blocksize(nsize),
700 hammer_blockoff(ip->ino_data.size),
701 hammer_blockoff(nsize),
702 trivial);
d5ef456e 703 fixsize = 1;
fbb84158 704 kflags |= NOTE_EXTEND;
d5ef456e
MD
705 }
706
c0ade690
MD
707 if (uio->uio_segflg == UIO_NOCOPY) {
708 /*
709 * Issuing a write with the same data backing the
710 * buffer. Instantiate the buffer to collect the
711 * backing vm pages, then read-in any missing bits.
712 *
713 * This case is used by vop_stdputpages().
714 */
47637bff 715 bp = getblk(ap->a_vp, base_offset,
4a2796f3 716 blksize, GETBLK_BHEAVY, 0);
c0ade690
MD
717 if ((bp->b_flags & B_CACHE) == 0) {
718 bqrelse(bp);
47637bff 719 error = bread(ap->a_vp, base_offset,
4a2796f3 720 blksize, &bp);
c0ade690 721 }
4a2796f3 722 } else if (offset == 0 && uio->uio_resid >= blksize) {
c0ade690 723 /*
a5fddc16
MD
724 * Even though we are entirely overwriting the buffer
725 * we may still have to zero it out to avoid a
726 * mmap/write visibility issue.
c0ade690 727 */
4a2796f3 728 bp = getblk(ap->a_vp, base_offset, blksize, GETBLK_BHEAVY, 0);
a5fddc16
MD
729 if ((bp->b_flags & B_CACHE) == 0)
730 vfs_bio_clrbuf(bp);
47637bff 731 } else if (base_offset >= ip->ino_data.size) {
c0ade690 732 /*
a5fddc16
MD
733 * If the base offset of the buffer is beyond the
734 * file EOF, we don't have to issue a read.
c0ade690 735 */
47637bff 736 bp = getblk(ap->a_vp, base_offset,
4a2796f3 737 blksize, GETBLK_BHEAVY, 0);
66325755
MD
738 vfs_bio_clrbuf(bp);
739 } else {
c0ade690
MD
740 /*
741 * Partial overwrite, read in any missing bits then
742 * replace the portion being written.
743 */
4a2796f3 744 error = bread(ap->a_vp, base_offset, blksize, &bp);
d5ef456e
MD
745 if (error == 0)
746 bheavy(bp);
66325755 747 }
df01a101
MD
748 if (error == 0) {
749 lwkt_reltoken(&hmp->fs_token);
9192654c 750 error = uiomove(bp->b_data + offset, n, uio);
df01a101
MD
751 lwkt_gettoken(&hmp->fs_token);
752 }
9192654c
MD
753
754 /*
47f363f1
MD
755 * Generate REDO records if enabled and redo_count will not
756 * exceeded the limit.
757 *
758 * If redo_count exceeds the limit we stop generating records
759 * and clear HAMMER_INODE_REDO. This will cause the next
760 * fsync() to do a full meta-data sync instead of just an
761 * UNDO/REDO fifo update.
762 *
763 * When clearing HAMMER_INODE_REDO any pre-existing REDOs
764 * will still be tracked. The tracks will be terminated
765 * when the related meta-data (including possible data
766 * modifications which are not tracked via REDO) is
767 * flushed.
9192654c 768 */
47f363f1
MD
769 if ((ip->flags & HAMMER_INODE_REDO) && error == 0) {
770 if (ip->redo_count < hammer_limit_redo) {
771 bp->b_flags |= B_VFSFLAG1;
772 error = hammer_generate_redo(&trans, ip,
9192654c 773 base_offset + offset,
47f363f1 774 HAMMER_REDO_WRITE,
9192654c
MD
775 bp->b_data + offset,
776 (size_t)n);
47f363f1
MD
777 } else {
778 ip->flags &= ~HAMMER_INODE_REDO;
779 }
47637bff 780 }
d5ef456e
MD
781
782 /*
783 * If we screwed up we have to undo any VM size changes we
784 * made.
785 */
66325755
MD
786 if (error) {
787 brelse(bp);
d5ef456e 788 if (fixsize) {
6362a262
MD
789 nvtruncbuf(ap->a_vp, ip->ino_data.size,
790 hammer_blocksize(ip->ino_data.size),
753df37e
MD
791 hammer_blockoff(ip->ino_data.size),
792 0);
d5ef456e 793 }
66325755
MD
794 break;
795 }
fbb84158 796 kflags |= NOTE_WRITE;
ce0138a6 797 hammer_stats_file_write += n;
66030e2b
MD
798 if (blksize == HAMMER_XBUFSIZE)
799 bp->b_flags |= B_CLUSTEROK;
11ad5ade
MD
800 if (ip->ino_data.size < uio->uio_offset) {
801 ip->ino_data.size = uio->uio_offset;
9192654c 802 flags = HAMMER_INODE_SDIRTY;
c0ade690 803 } else {
d113fda1 804 flags = 0;
66325755 805 }
11ad5ade 806 ip->ino_data.mtime = trans.time;
ddfdf542 807 flags |= HAMMER_INODE_MTIME | HAMMER_INODE_BUFS;
e98f1b96 808 hammer_modify_inode(&trans, ip, flags);
32c90105 809
0832c9bb 810 /*
1b0ab2c3
MD
811 * Once we dirty the buffer any cached zone-X offset
812 * becomes invalid. HAMMER NOTE: no-history mode cannot
813 * allow overwriting over the same data sector unless
814 * we provide UNDOs for the old data, which we don't.
815 */
816 bp->b_bio2.bio_offset = NOOFFSET;
817
818 /*
47637bff 819 * Final buffer disposition.
de996e86
MD
820 *
821 * Because meta-data updates are deferred, HAMMER is
822 * especially sensitive to excessive bdwrite()s because
823 * the I/O stream is not broken up by disk reads. So the
824 * buffer cache simply cannot keep up.
825 *
826 * WARNING! blksize is variable. cluster_write() is
d1eff1f7
MD
827 * expected to not blow up if it encounters
828 * buffers that do not match the passed blksize.
710733a6
MD
829 *
830 * NOTE! Hammer shouldn't need to bawrite()/cluster_write().
831 * The ip->rsv_recs check should burst-flush the data.
832 * If we queue it immediately the buf could be left
833 * locked on the device queue for a very long time.
d1eff1f7 834 *
55b50bd5
MD
835 * However, failing to flush a dirty buffer out when
836 * issued from the pageout daemon can result in a low
837 * memory deadlock against bio_page_alloc(), so we
838 * have to bawrite() on IO_ASYNC as well.
839 *
d1eff1f7
MD
840 * NOTE! To avoid degenerate stalls due to mismatched block
841 * sizes we only honor IO_DIRECT on the write which
842 * abuts the end of the buffer. However, we must
843 * honor IO_SYNC in case someone is silly enough to
844 * configure a HAMMER file as swap, or when HAMMER
845 * is serving NFS (for commits). Ick ick.
47637bff 846 */
66030e2b
MD
847 bp->b_flags |= B_AGE;
848 if (blksize == HAMMER_XBUFSIZE)
849 bp->b_flags |= B_CLUSTEROK;
850
66325755
MD
851 if (ap->a_ioflag & IO_SYNC) {
852 bwrite(bp);
d1eff1f7 853 } else if ((ap->a_ioflag & IO_DIRECT) && endofblk) {
66325755 854 bawrite(bp);
55b50bd5
MD
855 } else if (ap->a_ioflag & IO_ASYNC) {
856 bawrite(bp);
9de13b88
MD
857 } else if (hammer_cluster_enable &&
858 !(ap->a_vp->v_mount->mnt_flag & MNT_NOCLUSTERW)) {
859 if (base_offset < HAMMER_XDEMARC)
860 cluster_eof = hammer_blockdemarc(base_offset,
861 ip->ino_data.size);
862 else
863 cluster_eof = ip->ino_data.size;
864 cluster_write(bp, cluster_eof, blksize, seqcount);
710733a6 865 } else {
4a2796f3
MD
866 bdwrite(bp);
867 }
66325755 868 }
b84de5af 869 hammer_done_transaction(&trans);
fbb84158 870 hammer_knote(ap->a_vp, kflags);
b0aab9b9 871 lwkt_reltoken(&hmp->fs_token);
66325755 872 return (error);
427e5fc6
MD
873}
874
66325755
MD
875/*
876 * hammer_vop_access { vp, mode, cred }
b0aab9b9
MD
877 *
878 * MPSAFE - does not require fs_token
66325755 879 */
427e5fc6
MD
880static
881int
66325755 882hammer_vop_access(struct vop_access_args *ap)
427e5fc6 883{
66325755
MD
884 struct hammer_inode *ip = VTOI(ap->a_vp);
885 uid_t uid;
886 gid_t gid;
887 int error;
888
ce0138a6 889 ++hammer_stats_file_iopsr;
66325755
MD
890 uid = hammer_to_unix_xid(&ip->ino_data.uid);
891 gid = hammer_to_unix_xid(&ip->ino_data.gid);
892
893 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
894 ip->ino_data.uflags);
895 return (error);
427e5fc6
MD
896}
897
66325755
MD
898/*
899 * hammer_vop_advlock { vp, id, op, fl, flags }
b0aab9b9
MD
900 *
901 * MPSAFE - does not require fs_token
66325755 902 */
427e5fc6
MD
903static
904int
66325755 905hammer_vop_advlock(struct vop_advlock_args *ap)
427e5fc6 906{
4a2796f3 907 hammer_inode_t ip = VTOI(ap->a_vp);
66325755 908
11ad5ade 909 return (lf_advlock(ap, &ip->advlock, ip->ino_data.size));
427e5fc6
MD
910}
911
66325755
MD
912/*
913 * hammer_vop_close { vp, fflag }
6f3d87c0 914 *
b0aab9b9 915 * We can only sync-on-close for normal closes. XXX disabled for now.
66325755 916 */
427e5fc6
MD
917static
918int
66325755 919hammer_vop_close(struct vop_close_args *ap)
427e5fc6 920{
9192654c 921#if 0
6f3d87c0
MD
922 struct vnode *vp = ap->a_vp;
923 hammer_inode_t ip = VTOI(vp);
924 int waitfor;
6f3d87c0
MD
925 if (ip->flags & (HAMMER_INODE_CLOSESYNC|HAMMER_INODE_CLOSEASYNC)) {
926 if (vn_islocked(vp) == LK_EXCLUSIVE &&
927 (vp->v_flag & (VINACTIVE|VRECLAIMED)) == 0) {
928 if (ip->flags & HAMMER_INODE_CLOSESYNC)
929 waitfor = MNT_WAIT;
930 else
931 waitfor = MNT_NOWAIT;
932 ip->flags &= ~(HAMMER_INODE_CLOSESYNC |
933 HAMMER_INODE_CLOSEASYNC);
934 VOP_FSYNC(vp, MNT_NOWAIT, waitfor);
935 }
936 }
9192654c 937#endif
a89aec1b 938 return (vop_stdclose(ap));
427e5fc6
MD
939}
940
66325755
MD
941/*
942 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
943 *
944 * The operating system has already ensured that the directory entry
945 * does not exist and done all appropriate namespace locking.
946 */
427e5fc6
MD
947static
948int
66325755 949hammer_vop_ncreate(struct vop_ncreate_args *ap)
427e5fc6 950{
66325755
MD
951 struct hammer_transaction trans;
952 struct hammer_inode *dip;
953 struct hammer_inode *nip;
954 struct nchandle *nch;
b0aab9b9 955 hammer_mount_t hmp;
66325755
MD
956 int error;
957
958 nch = ap->a_nch;
959 dip = VTOI(ap->a_dvp);
b0aab9b9 960 hmp = dip->hmp;
66325755 961
d113fda1
MD
962 if (dip->flags & HAMMER_INODE_RO)
963 return (EROFS);
b0aab9b9 964 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 965 return (error);
d113fda1 966
66325755
MD
967 /*
968 * Create a transaction to cover the operations we perform.
969 */
b0aab9b9
MD
970 lwkt_gettoken(&hmp->fs_token);
971 hammer_start_transaction(&trans, hmp);
ce0138a6 972 ++hammer_stats_file_iopsw;
66325755
MD
973
974 /*
975 * Create a new filesystem object of the requested type. The
b84de5af
MD
976 * returned inode will be referenced and shared-locked to prevent
977 * it from being moved to the flusher.
66325755 978 */
5a930e66 979 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
5a64efa1
MD
980 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
981 NULL, &nip);
66325755 982 if (error) {
77062c8a 983 hkprintf("hammer_create_inode error %d\n", error);
b84de5af 984 hammer_done_transaction(&trans);
66325755 985 *ap->a_vpp = NULL;
b0aab9b9 986 lwkt_reltoken(&hmp->fs_token);
66325755
MD
987 return (error);
988 }
66325755
MD
989
990 /*
991 * Add the new filesystem object to the directory. This will also
992 * bump the inode's link count.
993 */
5a930e66
MD
994 error = hammer_ip_add_directory(&trans, dip,
995 nch->ncp->nc_name, nch->ncp->nc_nlen,
996 nip);
0b075555 997 if (error)
77062c8a 998 hkprintf("hammer_ip_add_directory error %d\n", error);
66325755
MD
999
1000 /*
1001 * Finish up.
1002 */
1003 if (error) {
a89aec1b 1004 hammer_rel_inode(nip, 0);
b84de5af 1005 hammer_done_transaction(&trans);
66325755
MD
1006 *ap->a_vpp = NULL;
1007 } else {
e8599db1 1008 error = hammer_get_vnode(nip, ap->a_vpp);
b84de5af 1009 hammer_done_transaction(&trans);
a89aec1b
MD
1010 hammer_rel_inode(nip, 0);
1011 if (error == 0) {
1012 cache_setunresolved(ap->a_nch);
1013 cache_setvp(ap->a_nch, *ap->a_vpp);
1014 }
fbb84158 1015 hammer_knote(ap->a_dvp, NOTE_WRITE);
66325755 1016 }
b0aab9b9 1017 lwkt_reltoken(&hmp->fs_token);
66325755 1018 return (error);
427e5fc6
MD
1019}
1020
66325755
MD
1021/*
1022 * hammer_vop_getattr { vp, vap }
98f7132d
MD
1023 *
1024 * Retrieve an inode's attribute information. When accessing inodes
1025 * historically we fake the atime field to ensure consistent results.
1026 * The atime field is stored in the B-Tree element and allowed to be
1027 * updated without cycling the element.
899eb297 1028 *
b0aab9b9 1029 * MPSAFE - does not require fs_token
66325755 1030 */
427e5fc6
MD
1031static
1032int
66325755 1033hammer_vop_getattr(struct vop_getattr_args *ap)
427e5fc6 1034{
66325755
MD
1035 struct hammer_inode *ip = VTOI(ap->a_vp);
1036 struct vattr *vap = ap->a_vap;
1037
a56cb012
MD
1038 /*
1039 * We want the fsid to be different when accessing a filesystem
1040 * with different as-of's so programs like diff don't think
1041 * the files are the same.
1042 *
1043 * We also want the fsid to be the same when comparing snapshots,
1044 * or when comparing mirrors (which might be backed by different
1045 * physical devices). HAMMER fsids are based on the PFS's
1046 * shared_uuid field.
1047 *
1048 * XXX there is a chance of collision here. The va_fsid reported
1049 * by stat is different from the more involved fsid used in the
1050 * mount structure.
c82af904 1051 */
ce0138a6 1052 ++hammer_stats_file_iopsr;
899eb297 1053 hammer_lock_sh(&ip->lock);
a56cb012
MD
1054 vap->va_fsid = ip->pfsm->fsid_udev ^ (u_int32_t)ip->obj_asof ^
1055 (u_int32_t)(ip->obj_asof >> 32);
1056
11ad5ade 1057 vap->va_fileid = ip->ino_leaf.base.obj_id;
66325755 1058 vap->va_mode = ip->ino_data.mode;
11ad5ade 1059 vap->va_nlink = ip->ino_data.nlinks;
66325755
MD
1060 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
1061 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
1062 vap->va_rmajor = 0;
1063 vap->va_rminor = 0;
11ad5ade 1064 vap->va_size = ip->ino_data.size;
bcac4bbb
MD
1065
1066 /*
f437a2ab
MD
1067 * Special case for @@PFS softlinks. The actual size of the
1068 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
cb3c760c 1069 * or for MAX_TID is "@@-1:%05d" == 10 bytes.
f437a2ab
MD
1070 */
1071 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_SOFTLINK &&
1072 ip->ino_data.size == 10 &&
1073 ip->obj_asof == HAMMER_MAX_TID &&
1074 ip->obj_localization == 0 &&
1075 strncmp(ip->ino_data.ext.symlink, "@@PFS", 5) == 0) {
cb3c760c
MD
1076 if (ip->pfsm->pfsd.mirror_flags & HAMMER_PFSD_SLAVE)
1077 vap->va_size = 26;
1078 else
1079 vap->va_size = 10;
f437a2ab
MD
1080 }
1081
1082 /*
bcac4bbb
MD
1083 * We must provide a consistent atime and mtime for snapshots
1084 * so people can do a 'tar cf - ... | md5' on them and get
1085 * consistent results.
1086 */
1087 if (ip->flags & HAMMER_INODE_RO) {
ddfdf542
MD
1088 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_atime);
1089 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_mtime);
bcac4bbb 1090 } else {
ddfdf542
MD
1091 hammer_time_to_timespec(ip->ino_data.atime, &vap->va_atime);
1092 hammer_time_to_timespec(ip->ino_data.mtime, &vap->va_mtime);
bcac4bbb 1093 }
ddfdf542 1094 hammer_time_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
66325755
MD
1095 vap->va_flags = ip->ino_data.uflags;
1096 vap->va_gen = 1; /* hammer inums are unique for all time */
bf686dbe 1097 vap->va_blocksize = HAMMER_BUFSIZE;
4a2796f3
MD
1098 if (ip->ino_data.size >= HAMMER_XDEMARC) {
1099 vap->va_bytes = (ip->ino_data.size + HAMMER_XBUFMASK64) &
1100 ~HAMMER_XBUFMASK64;
1101 } else if (ip->ino_data.size > HAMMER_BUFSIZE / 2) {
1102 vap->va_bytes = (ip->ino_data.size + HAMMER_BUFMASK64) &
1103 ~HAMMER_BUFMASK64;
1104 } else {
1105 vap->va_bytes = (ip->ino_data.size + 15) & ~15;
1106 }
64950f31 1107
11ad5ade 1108 vap->va_type = hammer_get_vnode_type(ip->ino_data.obj_type);
66325755 1109 vap->va_filerev = 0; /* XXX */
66325755
MD
1110 vap->va_uid_uuid = ip->ino_data.uid;
1111 vap->va_gid_uuid = ip->ino_data.gid;
1112 vap->va_fsid_uuid = ip->hmp->fsid;
1113 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
1114 VA_FSID_UUID_VALID;
7a04d74f 1115
11ad5ade 1116 switch (ip->ino_data.obj_type) {
7a04d74f
MD
1117 case HAMMER_OBJTYPE_CDEV:
1118 case HAMMER_OBJTYPE_BDEV:
1119 vap->va_rmajor = ip->ino_data.rmajor;
1120 vap->va_rminor = ip->ino_data.rminor;
1121 break;
1122 default:
1123 break;
1124 }
899eb297 1125 hammer_unlock(&ip->lock);
66325755 1126 return(0);
427e5fc6
MD
1127}
1128
66325755
MD
1129/*
1130 * hammer_vop_nresolve { nch, dvp, cred }
1131 *
1132 * Locate the requested directory entry.
1133 */
427e5fc6
MD
1134static
1135int
66325755 1136hammer_vop_nresolve(struct vop_nresolve_args *ap)
427e5fc6 1137{
36f82b23 1138 struct hammer_transaction trans;
66325755 1139 struct namecache *ncp;
b0aab9b9 1140 hammer_mount_t hmp;
7f7c1f84
MD
1141 hammer_inode_t dip;
1142 hammer_inode_t ip;
1143 hammer_tid_t asof;
8cd0a023 1144 struct hammer_cursor cursor;
66325755
MD
1145 struct vnode *vp;
1146 int64_t namekey;
1147 int error;
7f7c1f84
MD
1148 int i;
1149 int nlen;
d113fda1 1150 int flags;
a56cb012 1151 int ispfs;
adf01747 1152 int64_t obj_id;
ddfdf542 1153 u_int32_t localization;
5e435c92 1154 u_int32_t max_iterations;
7f7c1f84
MD
1155
1156 /*
1157 * Misc initialization, plus handle as-of name extensions. Look for
1158 * the '@@' extension. Note that as-of files and directories cannot
1159 * be modified.
7f7c1f84
MD
1160 */
1161 dip = VTOI(ap->a_dvp);
1162 ncp = ap->a_nch->ncp;
1163 asof = dip->obj_asof;
bc6c1f13 1164 localization = dip->obj_localization; /* for code consistency */
7f7c1f84 1165 nlen = ncp->nc_nlen;
ea434b6f 1166 flags = dip->flags & HAMMER_INODE_RO;
a56cb012 1167 ispfs = 0;
b0aab9b9 1168 hmp = dip->hmp;
7f7c1f84 1169
b0aab9b9
MD
1170 lwkt_gettoken(&hmp->fs_token);
1171 hammer_simple_transaction(&trans, hmp);
ce0138a6 1172 ++hammer_stats_file_iopsr;
36f82b23 1173
7f7c1f84
MD
1174 for (i = 0; i < nlen; ++i) {
1175 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
bc6c1f13
MD
1176 error = hammer_str_to_tid(ncp->nc_name + i + 2,
1177 &ispfs, &asof, &localization);
1178 if (error != 0) {
1179 i = nlen;
1180 break;
1181 }
ea434b6f
MD
1182 if (asof != HAMMER_MAX_TID)
1183 flags |= HAMMER_INODE_RO;
7f7c1f84
MD
1184 break;
1185 }
1186 }
1187 nlen = i;
66325755 1188
8cd0a023 1189 /*
ea434b6f
MD
1190 * If this is a PFS softlink we dive into the PFS
1191 */
1192 if (ispfs && nlen == 0) {
1193 ip = hammer_get_inode(&trans, dip, HAMMER_OBJID_ROOT,
1194 asof, localization,
1195 flags, &error);
1196 if (error == 0) {
1197 error = hammer_get_vnode(ip, &vp);
1198 hammer_rel_inode(ip, 0);
1199 } else {
1200 vp = NULL;
1201 }
1202 if (error == 0) {
1203 vn_unlock(vp);
1204 cache_setvp(ap->a_nch, vp);
1205 vrele(vp);
1206 }
1207 goto done;
1208 }
1209
1210 /*
294aec9f
MD
1211 * If there is no path component the time extension is relative to dip.
1212 * e.g. "fubar/@@<snapshot>"
1213 *
1214 * "." is handled by the kernel, but ".@@<snapshot>" is not.
1215 * e.g. "fubar/.@@<snapshot>"
1216 *
1217 * ".." is handled by the kernel. We do not currently handle
1218 * "..@<snapshot>".
d113fda1 1219 */
294aec9f 1220 if (nlen == 0 || (nlen == 1 && ncp->nc_name[0] == '.')) {
bcac4bbb 1221 ip = hammer_get_inode(&trans, dip, dip->obj_id,
ddfdf542
MD
1222 asof, dip->obj_localization,
1223 flags, &error);
d113fda1 1224 if (error == 0) {
e8599db1 1225 error = hammer_get_vnode(ip, &vp);
d113fda1
MD
1226 hammer_rel_inode(ip, 0);
1227 } else {
1228 vp = NULL;
1229 }
1230 if (error == 0) {
1231 vn_unlock(vp);
1232 cache_setvp(ap->a_nch, vp);
1233 vrele(vp);
1234 }
36f82b23 1235 goto done;
d113fda1
MD
1236 }
1237
1238 /*
8cd0a023
MD
1239 * Calculate the namekey and setup the key range for the scan. This
1240 * works kinda like a chained hash table where the lower 32 bits
1241 * of the namekey synthesize the chain.
1242 *
1243 * The key range is inclusive of both key_beg and key_end.
1244 */
5e435c92
MD
1245 namekey = hammer_directory_namekey(dip, ncp->nc_name, nlen,
1246 &max_iterations);
66325755 1247
bcac4bbb 1248 error = hammer_init_cursor(&trans, &cursor, &dip->cache[1], dip);
5a930e66 1249 cursor.key_beg.localization = dip->obj_localization +
beec5dc4 1250 hammer_dir_localization(dip);
8cd0a023
MD
1251 cursor.key_beg.obj_id = dip->obj_id;
1252 cursor.key_beg.key = namekey;
d5530d22 1253 cursor.key_beg.create_tid = 0;
8cd0a023
MD
1254 cursor.key_beg.delete_tid = 0;
1255 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1256 cursor.key_beg.obj_type = 0;
66325755 1257
8cd0a023 1258 cursor.key_end = cursor.key_beg;
5e435c92 1259 cursor.key_end.key += max_iterations;
d5530d22
MD
1260 cursor.asof = asof;
1261 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
66325755
MD
1262
1263 /*
8cd0a023 1264 * Scan all matching records (the chain), locate the one matching
a89aec1b 1265 * the requested path component.
8cd0a023
MD
1266 *
1267 * The hammer_ip_*() functions merge in-memory records with on-disk
1268 * records for the purposes of the search.
66325755 1269 */
6a37e7e4 1270 obj_id = 0;
43c665ae 1271 localization = HAMMER_DEF_LOCALIZATION;
6a37e7e4 1272
4e17f465 1273 if (error == 0) {
4e17f465
MD
1274 error = hammer_ip_first(&cursor);
1275 while (error == 0) {
1276 error = hammer_ip_resolve_data(&cursor);
1277 if (error)
1278 break;
11ad5ade
MD
1279 if (nlen == cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF &&
1280 bcmp(ncp->nc_name, cursor.data->entry.name, nlen) == 0) {
1281 obj_id = cursor.data->entry.obj_id;
ddfdf542 1282 localization = cursor.data->entry.localization;
4e17f465
MD
1283 break;
1284 }
1285 error = hammer_ip_next(&cursor);
66325755
MD
1286 }
1287 }
6a37e7e4 1288 hammer_done_cursor(&cursor);
4c286c36
MD
1289
1290 /*
1291 * Lookup the obj_id. This should always succeed. If it does not
1292 * the filesystem may be damaged and we return a dummy inode.
1293 */
66325755 1294 if (error == 0) {
bcac4bbb 1295 ip = hammer_get_inode(&trans, dip, obj_id,
ddfdf542
MD
1296 asof, localization,
1297 flags, &error);
4c286c36
MD
1298 if (error == ENOENT) {
1299 kprintf("HAMMER: WARNING: Missing "
1300 "inode for dirent \"%s\"\n"
3d30bff3
MD
1301 "\tobj_id = %016llx, asof=%016llx, lo=%08x\n",
1302 ncp->nc_name,
1303 (long long)obj_id, (long long)asof,
1304 localization);
4c286c36
MD
1305 error = 0;
1306 ip = hammer_get_dummy_inode(&trans, dip, obj_id,
1307 asof, localization,
1308 flags, &error);
1309 }
7f7c1f84 1310 if (error == 0) {
e8599db1 1311 error = hammer_get_vnode(ip, &vp);
7f7c1f84
MD
1312 hammer_rel_inode(ip, 0);
1313 } else {
1314 vp = NULL;
1315 }
66325755
MD
1316 if (error == 0) {
1317 vn_unlock(vp);
1318 cache_setvp(ap->a_nch, vp);
1319 vrele(vp);
1320 }
1321 } else if (error == ENOENT) {
1322 cache_setvp(ap->a_nch, NULL);
1323 }
36f82b23 1324done:
b84de5af 1325 hammer_done_transaction(&trans);
b0aab9b9 1326 lwkt_reltoken(&hmp->fs_token);
66325755 1327 return (error);
427e5fc6
MD
1328}
1329
66325755
MD
1330/*
1331 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
1332 *
1333 * Locate the parent directory of a directory vnode.
1334 *
1335 * dvp is referenced but not locked. *vpp must be returned referenced and
1336 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
1337 * at the root, instead it could indicate that the directory we were in was
1338 * removed.
42c7d26b
MD
1339 *
1340 * NOTE: as-of sequences are not linked into the directory structure. If
1341 * we are at the root with a different asof then the mount point, reload
1342 * the same directory with the mount point's asof. I'm not sure what this
1343 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
1344 * get confused, but it hasn't been tested.
66325755 1345 */
427e5fc6
MD
1346static
1347int
66325755 1348hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
427e5fc6 1349{
36f82b23 1350 struct hammer_transaction trans;
66325755 1351 struct hammer_inode *dip;
d113fda1 1352 struct hammer_inode *ip;
b0aab9b9 1353 hammer_mount_t hmp;
42c7d26b 1354 int64_t parent_obj_id;
5a930e66 1355 u_int32_t parent_obj_localization;
42c7d26b 1356 hammer_tid_t asof;
d113fda1 1357 int error;
66325755
MD
1358
1359 dip = VTOI(ap->a_dvp);
42c7d26b 1360 asof = dip->obj_asof;
b0aab9b9 1361 hmp = dip->hmp;
5a930e66
MD
1362
1363 /*
1364 * Whos are parent? This could be the root of a pseudo-filesystem
1365 * whos parent is in another localization domain.
1366 */
b0aab9b9 1367 lwkt_gettoken(&hmp->fs_token);
42c7d26b 1368 parent_obj_id = dip->ino_data.parent_obj_id;
5a930e66
MD
1369 if (dip->obj_id == HAMMER_OBJID_ROOT)
1370 parent_obj_localization = dip->ino_data.ext.obj.parent_obj_localization;
1371 else
1372 parent_obj_localization = dip->obj_localization;
42c7d26b
MD
1373
1374 if (parent_obj_id == 0) {
1375 if (dip->obj_id == HAMMER_OBJID_ROOT &&
b0aab9b9 1376 asof != hmp->asof) {
42c7d26b 1377 parent_obj_id = dip->obj_id;
b0aab9b9 1378 asof = hmp->asof;
42c7d26b
MD
1379 *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
1380 ksnprintf(*ap->a_fakename, 19, "0x%016llx",
973c11b9 1381 (long long)dip->obj_asof);
42c7d26b
MD
1382 } else {
1383 *ap->a_vpp = NULL;
b0aab9b9 1384 lwkt_reltoken(&hmp->fs_token);
42c7d26b
MD
1385 return ENOENT;
1386 }
66325755 1387 }
d113fda1 1388
b0aab9b9 1389 hammer_simple_transaction(&trans, hmp);
ce0138a6 1390 ++hammer_stats_file_iopsr;
36f82b23 1391
bcac4bbb 1392 ip = hammer_get_inode(&trans, dip, parent_obj_id,
5a930e66 1393 asof, parent_obj_localization,
ddfdf542 1394 dip->flags, &error);
36f82b23 1395 if (ip) {
e8599db1 1396 error = hammer_get_vnode(ip, ap->a_vpp);
36f82b23
MD
1397 hammer_rel_inode(ip, 0);
1398 } else {
d113fda1 1399 *ap->a_vpp = NULL;
d113fda1 1400 }
b84de5af 1401 hammer_done_transaction(&trans);
b0aab9b9 1402 lwkt_reltoken(&hmp->fs_token);
d113fda1 1403 return (error);
427e5fc6
MD
1404}
1405
66325755
MD
1406/*
1407 * hammer_vop_nlink { nch, dvp, vp, cred }
1408 */
427e5fc6
MD
1409static
1410int
66325755 1411hammer_vop_nlink(struct vop_nlink_args *ap)
427e5fc6 1412{
66325755
MD
1413 struct hammer_transaction trans;
1414 struct hammer_inode *dip;
1415 struct hammer_inode *ip;
1416 struct nchandle *nch;
b0aab9b9 1417 hammer_mount_t hmp;
66325755
MD
1418 int error;
1419
f437a2ab
MD
1420 if (ap->a_dvp->v_mount != ap->a_vp->v_mount)
1421 return(EXDEV);
1422
66325755
MD
1423 nch = ap->a_nch;
1424 dip = VTOI(ap->a_dvp);
1425 ip = VTOI(ap->a_vp);
b0aab9b9 1426 hmp = dip->hmp;
66325755 1427
f437a2ab
MD
1428 if (dip->obj_localization != ip->obj_localization)
1429 return(EXDEV);
1430
d113fda1
MD
1431 if (dip->flags & HAMMER_INODE_RO)
1432 return (EROFS);
1433 if (ip->flags & HAMMER_INODE_RO)
1434 return (EROFS);
b0aab9b9 1435 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1436 return (error);
d113fda1 1437
66325755
MD
1438 /*
1439 * Create a transaction to cover the operations we perform.
1440 */
b0aab9b9
MD
1441 lwkt_gettoken(&hmp->fs_token);
1442 hammer_start_transaction(&trans, hmp);
ce0138a6 1443 ++hammer_stats_file_iopsw;
66325755
MD
1444
1445 /*
1446 * Add the filesystem object to the directory. Note that neither
1447 * dip nor ip are referenced or locked, but their vnodes are
1448 * referenced. This function will bump the inode's link count.
1449 */
5a930e66
MD
1450 error = hammer_ip_add_directory(&trans, dip,
1451 nch->ncp->nc_name, nch->ncp->nc_nlen,
1452 ip);
66325755
MD
1453
1454 /*
1455 * Finish up.
1456 */
b84de5af 1457 if (error == 0) {
6b4f890b
MD
1458 cache_setunresolved(nch);
1459 cache_setvp(nch, ap->a_vp);
66325755 1460 }
b84de5af 1461 hammer_done_transaction(&trans);
fbb84158
MD
1462 hammer_knote(ap->a_vp, NOTE_LINK);
1463 hammer_knote(ap->a_dvp, NOTE_WRITE);
b0aab9b9 1464 lwkt_reltoken(&hmp->fs_token);
66325755 1465 return (error);
427e5fc6
MD
1466}
1467
66325755
MD
1468/*
1469 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1470 *
1471 * The operating system has already ensured that the directory entry
1472 * does not exist and done all appropriate namespace locking.
1473 */
427e5fc6
MD
1474static
1475int
66325755 1476hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
427e5fc6 1477{
66325755
MD
1478 struct hammer_transaction trans;
1479 struct hammer_inode *dip;
1480 struct hammer_inode *nip;
1481 struct nchandle *nch;
b0aab9b9 1482 hammer_mount_t hmp;
66325755
MD
1483 int error;
1484
1485 nch = ap->a_nch;
1486 dip = VTOI(ap->a_dvp);
b0aab9b9 1487 hmp = dip->hmp;
66325755 1488
d113fda1
MD
1489 if (dip->flags & HAMMER_INODE_RO)
1490 return (EROFS);
b0aab9b9 1491 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1492 return (error);
d113fda1 1493
66325755
MD
1494 /*
1495 * Create a transaction to cover the operations we perform.
1496 */
b0aab9b9
MD
1497 lwkt_gettoken(&hmp->fs_token);
1498 hammer_start_transaction(&trans, hmp);
ce0138a6 1499 ++hammer_stats_file_iopsw;
66325755
MD
1500
1501 /*
1502 * Create a new filesystem object of the requested type. The
8cd0a023 1503 * returned inode will be referenced but not locked.
66325755 1504 */
5a930e66 1505 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
5a64efa1
MD
1506 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
1507 NULL, &nip);
66325755 1508 if (error) {
77062c8a 1509 hkprintf("hammer_mkdir error %d\n", error);
b84de5af 1510 hammer_done_transaction(&trans);
66325755 1511 *ap->a_vpp = NULL;
b0aab9b9 1512 lwkt_reltoken(&hmp->fs_token);
66325755
MD
1513 return (error);
1514 }
66325755
MD
1515 /*
1516 * Add the new filesystem object to the directory. This will also
1517 * bump the inode's link count.
1518 */
5a930e66
MD
1519 error = hammer_ip_add_directory(&trans, dip,
1520 nch->ncp->nc_name, nch->ncp->nc_nlen,
1521 nip);
0b075555 1522 if (error)
77062c8a 1523 hkprintf("hammer_mkdir (add) error %d\n", error);
66325755
MD
1524
1525 /*
1526 * Finish up.
1527 */
1528 if (error) {
a89aec1b 1529 hammer_rel_inode(nip, 0);
66325755
MD
1530 *ap->a_vpp = NULL;
1531 } else {
e8599db1 1532 error = hammer_get_vnode(nip, ap->a_vpp);
a89aec1b
MD
1533 hammer_rel_inode(nip, 0);
1534 if (error == 0) {
1535 cache_setunresolved(ap->a_nch);
1536 cache_setvp(ap->a_nch, *ap->a_vpp);
1537 }
66325755 1538 }
b84de5af 1539 hammer_done_transaction(&trans);
fbb84158
MD
1540 if (error == 0)
1541 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
b0aab9b9 1542 lwkt_reltoken(&hmp->fs_token);
66325755 1543 return (error);
427e5fc6
MD
1544}
1545
66325755
MD
1546/*
1547 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1548 *
1549 * The operating system has already ensured that the directory entry
1550 * does not exist and done all appropriate namespace locking.
1551 */
427e5fc6
MD
1552static
1553int
66325755 1554hammer_vop_nmknod(struct vop_nmknod_args *ap)
427e5fc6 1555{
66325755
MD
1556 struct hammer_transaction trans;
1557 struct hammer_inode *dip;
1558 struct hammer_inode *nip;
1559 struct nchandle *nch;
b0aab9b9 1560 hammer_mount_t hmp;
66325755
MD
1561 int error;
1562
1563 nch = ap->a_nch;
1564 dip = VTOI(ap->a_dvp);
b0aab9b9 1565 hmp = dip->hmp;
66325755 1566
d113fda1
MD
1567 if (dip->flags & HAMMER_INODE_RO)
1568 return (EROFS);
b0aab9b9 1569 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 1570 return (error);
d113fda1 1571
66325755
MD
1572 /*
1573 * Create a transaction to cover the operations we perform.
1574 */
b0aab9b9
MD
1575 lwkt_gettoken(&hmp->fs_token);
1576 hammer_start_transaction(&trans, hmp);
ce0138a6 1577 ++hammer_stats_file_iopsw;
66325755
MD
1578
1579 /*
1580 * Create a new filesystem object of the requested type. The
8cd0a023 1581 * returned inode will be referenced but not locked.
5a930e66
MD
1582 *
1583 * If mknod specifies a directory a pseudo-fs is created.
66325755 1584 */
5a930e66 1585 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
5a64efa1
MD
1586 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
1587 NULL, &nip);
66325755 1588 if (error) {
b84de5af 1589 hammer_done_transaction(&trans);
66325755 1590 *ap->a_vpp = NULL;
b0aab9b9 1591 lwkt_reltoken(&hmp->fs_token);
66325755
MD
1592 return (error);
1593 }
66325755
MD
1594
1595 /*
1596 * Add the new filesystem object to the directory. This will also
1597 * bump the inode's link count.
1598 */
5a930e66
MD
1599 error = hammer_ip_add_directory(&trans, dip,
1600 nch->ncp->nc_name, nch->ncp->nc_nlen,
1601 nip);
66325755
MD
1602
1603 /*
1604 * Finish up.
1605 */
1606 if (error) {
a89aec1b 1607 hammer_rel_inode(nip, 0);
66325755
MD
1608 *ap->a_vpp = NULL;
1609 } else {
e8599db1 1610 error = hammer_get_vnode(nip, ap->a_vpp);
a89aec1b
MD
1611 hammer_rel_inode(nip, 0);
1612 if (error == 0) {
1613 cache_setunresolved(ap->a_nch);
1614 cache_setvp(ap->a_nch, *ap->a_vpp);
1615 }
66325755 1616 }
b84de5af 1617 hammer_done_transaction(&trans);
fbb84158
MD
1618 if (error == 0)
1619 hammer_knote(ap->a_dvp, NOTE_WRITE);
b0aab9b9 1620 lwkt_reltoken(&hmp->fs_token);
66325755 1621 return (error);
427e5fc6
MD
1622}
1623
66325755
MD
1624/*
1625 * hammer_vop_open { vp, mode, cred, fp }
b0aab9b9
MD
1626 *
1627 * MPSAFE (does not require fs_token)
66325755 1628 */
427e5fc6
MD
1629static
1630int
66325755 1631hammer_vop_open(struct vop_open_args *ap)
427e5fc6 1632{
9f5097dc
MD
1633 hammer_inode_t ip;
1634
ce0138a6 1635 ++hammer_stats_file_iopsr;
9f5097dc
MD
1636 ip = VTOI(ap->a_vp);
1637
1638 if ((ap->a_mode & FWRITE) && (ip->flags & HAMMER_INODE_RO))
d113fda1 1639 return (EROFS);
a89aec1b 1640 return(vop_stdopen(ap));
427e5fc6
MD
1641}
1642
66325755 1643/*
66325755
MD
1644 * hammer_vop_print { vp }
1645 */
427e5fc6
MD
1646static
1647int
66325755 1648hammer_vop_print(struct vop_print_args *ap)
427e5fc6
MD
1649{
1650 return EOPNOTSUPP;
1651}
1652
66325755 1653/*
6b4f890b 1654 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
66325755 1655 */
427e5fc6
MD
1656static
1657int
66325755 1658hammer_vop_readdir(struct vop_readdir_args *ap)
427e5fc6 1659{
36f82b23 1660 struct hammer_transaction trans;
6b4f890b
MD
1661 struct hammer_cursor cursor;
1662 struct hammer_inode *ip;
b0aab9b9 1663 hammer_mount_t hmp;
6b4f890b 1664 struct uio *uio;
6b4f890b
MD
1665 hammer_base_elm_t base;
1666 int error;
1667 int cookie_index;
1668 int ncookies;
1669 off_t *cookies;
1670 off_t saveoff;
1671 int r;
ea434b6f 1672 int dtype;
6b4f890b 1673
ce0138a6 1674 ++hammer_stats_file_iopsr;
6b4f890b
MD
1675 ip = VTOI(ap->a_vp);
1676 uio = ap->a_uio;
b3deaf57 1677 saveoff = uio->uio_offset;
b0aab9b9 1678 hmp = ip->hmp;
b3deaf57
MD
1679
1680 if (ap->a_ncookies) {
1681 ncookies = uio->uio_resid / 16 + 1;
1682 if (ncookies > 1024)
1683 ncookies = 1024;
1684 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
1685 cookie_index = 0;
1686 } else {
1687 ncookies = -1;
1688 cookies = NULL;
1689 cookie_index = 0;
1690 }
1691
b0aab9b9
MD
1692 lwkt_gettoken(&hmp->fs_token);
1693 hammer_simple_transaction(&trans, hmp);
36f82b23 1694
b3deaf57
MD
1695 /*
1696 * Handle artificial entries
4c286c36
MD
1697 *
1698 * It should be noted that the minimum value for a directory
1699 * hash key on-media is 0x0000000100000000, so we can use anything
1700 * less then that to represent our 'special' key space.
b3deaf57
MD
1701 */
1702 error = 0;
1703 if (saveoff == 0) {
1704 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1705 if (r)
1706 goto done;
1707 if (cookies)
1708 cookies[cookie_index] = saveoff;
1709 ++saveoff;
1710 ++cookie_index;
1711 if (cookie_index == ncookies)
1712 goto done;
1713 }
1714 if (saveoff == 1) {
1715 if (ip->ino_data.parent_obj_id) {
1716 r = vop_write_dirent(&error, uio,
1717 ip->ino_data.parent_obj_id,
1718 DT_DIR, 2, "..");
1719 } else {
1720 r = vop_write_dirent(&error, uio,
1721 ip->obj_id, DT_DIR, 2, "..");
1722 }
1723 if (r)
1724 goto done;
1725 if (cookies)
1726 cookies[cookie_index] = saveoff;
1727 ++saveoff;
1728 ++cookie_index;
1729 if (cookie_index == ncookies)
1730 goto done;
1731 }
6b4f890b
MD
1732
1733 /*
1734 * Key range (begin and end inclusive) to scan. Directory keys
1735 * directly translate to a 64 bit 'seek' position.
1736 */
bcac4bbb 1737 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
5a930e66 1738 cursor.key_beg.localization = ip->obj_localization +
beec5dc4 1739 hammer_dir_localization(ip);
6b4f890b 1740 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 1741 cursor.key_beg.create_tid = 0;
6b4f890b
MD
1742 cursor.key_beg.delete_tid = 0;
1743 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1744 cursor.key_beg.obj_type = 0;
b3deaf57 1745 cursor.key_beg.key = saveoff;
6b4f890b
MD
1746
1747 cursor.key_end = cursor.key_beg;
1748 cursor.key_end.key = HAMMER_MAX_KEY;
d5530d22
MD
1749 cursor.asof = ip->obj_asof;
1750 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
6b4f890b 1751
4e17f465 1752 error = hammer_ip_first(&cursor);
6b4f890b
MD
1753
1754 while (error == 0) {
11ad5ade 1755 error = hammer_ip_resolve_data(&cursor);
6b4f890b
MD
1756 if (error)
1757 break;
11ad5ade 1758 base = &cursor.leaf->base;
6b4f890b 1759 saveoff = base->key;
11ad5ade 1760 KKASSERT(cursor.leaf->data_len > HAMMER_ENTRY_NAME_OFF);
6b4f890b 1761
7a04d74f
MD
1762 if (base->obj_id != ip->obj_id)
1763 panic("readdir: bad record at %p", cursor.node);
1764
ea434b6f
MD
1765 /*
1766 * Convert pseudo-filesystems into softlinks
1767 */
1768 dtype = hammer_get_dtype(cursor.leaf->base.obj_type);
6b4f890b 1769 r = vop_write_dirent(
11ad5ade 1770 &error, uio, cursor.data->entry.obj_id,
ea434b6f 1771 dtype,
11ad5ade
MD
1772 cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF ,
1773 (void *)cursor.data->entry.name);
6b4f890b
MD
1774 if (r)
1775 break;
1776 ++saveoff;
1777 if (cookies)
1778 cookies[cookie_index] = base->key;
1779 ++cookie_index;
1780 if (cookie_index == ncookies)
1781 break;
1782 error = hammer_ip_next(&cursor);
1783 }
1784 hammer_done_cursor(&cursor);
1785
b3deaf57 1786done:
b84de5af 1787 hammer_done_transaction(&trans);
36f82b23 1788
6b4f890b
MD
1789 if (ap->a_eofflag)
1790 *ap->a_eofflag = (error == ENOENT);
6b4f890b
MD
1791 uio->uio_offset = saveoff;
1792 if (error && cookie_index == 0) {
b3deaf57
MD
1793 if (error == ENOENT)
1794 error = 0;
6b4f890b
MD
1795 if (cookies) {
1796 kfree(cookies, M_TEMP);
1797 *ap->a_ncookies = 0;
1798 *ap->a_cookies = NULL;
1799 }
1800 } else {
7a04d74f
MD
1801 if (error == ENOENT)
1802 error = 0;
6b4f890b
MD
1803 if (cookies) {
1804 *ap->a_ncookies = cookie_index;
1805 *ap->a_cookies = cookies;
1806 }
1807 }
b0aab9b9 1808 lwkt_reltoken(&hmp->fs_token);
6b4f890b 1809 return(error);
427e5fc6
MD
1810}
1811
66325755
MD
1812/*
1813 * hammer_vop_readlink { vp, uio, cred }
1814 */
427e5fc6
MD
1815static
1816int
66325755 1817hammer_vop_readlink(struct vop_readlink_args *ap)
427e5fc6 1818{
36f82b23 1819 struct hammer_transaction trans;
7a04d74f
MD
1820 struct hammer_cursor cursor;
1821 struct hammer_inode *ip;
b0aab9b9 1822 hammer_mount_t hmp;
ea434b6f
MD
1823 char buf[32];
1824 u_int32_t localization;
1825 hammer_pseudofs_inmem_t pfsm;
7a04d74f
MD
1826 int error;
1827
1828 ip = VTOI(ap->a_vp);
b0aab9b9
MD
1829 hmp = ip->hmp;
1830
1831 lwkt_gettoken(&hmp->fs_token);
36f82b23 1832
2f85fa4d
MD
1833 /*
1834 * Shortcut if the symlink data was stuffed into ino_data.
ea434b6f 1835 *
842e7a70
MD
1836 * Also expand special "@@PFS%05d" softlinks (expansion only
1837 * occurs for non-historical (current) accesses made from the
1838 * primary filesystem).
2f85fa4d
MD
1839 */
1840 if (ip->ino_data.size <= HAMMER_INODE_BASESYMLEN) {
ea434b6f
MD
1841 char *ptr;
1842 int bytes;
1843
1844 ptr = ip->ino_data.ext.symlink;
1845 bytes = (int)ip->ino_data.size;
842e7a70
MD
1846 if (bytes == 10 &&
1847 ip->obj_asof == HAMMER_MAX_TID &&
1848 ip->obj_localization == 0 &&
1849 strncmp(ptr, "@@PFS", 5) == 0) {
b0aab9b9 1850 hammer_simple_transaction(&trans, hmp);
ea434b6f
MD
1851 bcopy(ptr + 5, buf, 5);
1852 buf[5] = 0;
1853 localization = strtoul(buf, NULL, 10) << 16;
1854 pfsm = hammer_load_pseudofs(&trans, localization,
1855 &error);
1856 if (error == 0) {
4c038e17
MD
1857 if (pfsm->pfsd.mirror_flags &
1858 HAMMER_PFSD_SLAVE) {
cb3c760c 1859 /* vap->va_size == 26 */
4c038e17
MD
1860 ksnprintf(buf, sizeof(buf),
1861 "@@0x%016llx:%05d",
973c11b9 1862 (long long)pfsm->pfsd.sync_end_tid,
4c038e17
MD
1863 localization >> 16);
1864 } else {
cb3c760c
MD
1865 /* vap->va_size == 10 */
1866 ksnprintf(buf, sizeof(buf),
1867 "@@-1:%05d",
1868 localization >> 16);
1869#if 0
4c038e17
MD
1870 ksnprintf(buf, sizeof(buf),
1871 "@@0x%016llx:%05d",
973c11b9 1872 (long long)HAMMER_MAX_TID,
4c038e17 1873 localization >> 16);
cb3c760c 1874#endif
4c038e17 1875 }
ea434b6f
MD
1876 ptr = buf;
1877 bytes = strlen(buf);
1878 }
1879 if (pfsm)
b0aab9b9 1880 hammer_rel_pseudofs(hmp, pfsm);
ea434b6f
MD
1881 hammer_done_transaction(&trans);
1882 }
1883 error = uiomove(ptr, bytes, ap->a_uio);
b0aab9b9 1884 lwkt_reltoken(&hmp->fs_token);
2f85fa4d
MD
1885 return(error);
1886 }
36f82b23 1887
2f85fa4d
MD
1888 /*
1889 * Long version
1890 */
b0aab9b9 1891 hammer_simple_transaction(&trans, hmp);
ce0138a6 1892 ++hammer_stats_file_iopsr;
bcac4bbb 1893 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
7a04d74f
MD
1894
1895 /*
1896 * Key range (begin and end inclusive) to scan. Directory keys
1897 * directly translate to a 64 bit 'seek' position.
1898 */
5a930e66
MD
1899 cursor.key_beg.localization = ip->obj_localization +
1900 HAMMER_LOCALIZE_MISC;
7a04d74f 1901 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 1902 cursor.key_beg.create_tid = 0;
7a04d74f
MD
1903 cursor.key_beg.delete_tid = 0;
1904 cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1905 cursor.key_beg.obj_type = 0;
1906 cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
d5530d22
MD
1907 cursor.asof = ip->obj_asof;
1908 cursor.flags |= HAMMER_CURSOR_ASOF;
7a04d74f 1909
45a014dc 1910 error = hammer_ip_lookup(&cursor);
7a04d74f
MD
1911 if (error == 0) {
1912 error = hammer_ip_resolve_data(&cursor);
1913 if (error == 0) {
11ad5ade
MD
1914 KKASSERT(cursor.leaf->data_len >=
1915 HAMMER_SYMLINK_NAME_OFF);
1916 error = uiomove(cursor.data->symlink.name,
1917 cursor.leaf->data_len -
1918 HAMMER_SYMLINK_NAME_OFF,
7a04d74f
MD
1919 ap->a_uio);
1920 }
1921 }
1922 hammer_done_cursor(&cursor);
b84de5af 1923 hammer_done_transaction(&trans);
b0aab9b9 1924 lwkt_reltoken(&hmp->fs_token);
7a04d74f 1925 return(error);
427e5fc6
MD
1926}
1927
66325755
MD
1928/*
1929 * hammer_vop_nremove { nch, dvp, cred }
1930 */
427e5fc6
MD
1931static
1932int
66325755 1933hammer_vop_nremove(struct vop_nremove_args *ap)
427e5fc6 1934{
b84de5af 1935 struct hammer_transaction trans;
e63644f0 1936 struct hammer_inode *dip;
b0aab9b9 1937 hammer_mount_t hmp;
b84de5af
MD
1938 int error;
1939
e63644f0 1940 dip = VTOI(ap->a_dvp);
b0aab9b9 1941 hmp = dip->hmp;
e63644f0
MD
1942
1943 if (hammer_nohistory(dip) == 0 &&
b0aab9b9 1944 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD
1945 return (error);
1946 }
1947
b0aab9b9
MD
1948 lwkt_gettoken(&hmp->fs_token);
1949 hammer_start_transaction(&trans, hmp);
ce0138a6 1950 ++hammer_stats_file_iopsw;
d7e278bb 1951 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 0);
b84de5af 1952 hammer_done_transaction(&trans);
fbb84158
MD
1953 if (error == 0)
1954 hammer_knote(ap->a_dvp, NOTE_WRITE);
b0aab9b9 1955 lwkt_reltoken(&hmp->fs_token);
b84de5af 1956 return (error);
427e5fc6
MD
1957}
1958
66325755
MD
1959/*
1960 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1961 */
427e5fc6
MD
1962static
1963int
66325755 1964hammer_vop_nrename(struct vop_nrename_args *ap)
427e5fc6 1965{
8cd0a023
MD
1966 struct hammer_transaction trans;
1967 struct namecache *fncp;
1968 struct namecache *tncp;
1969 struct hammer_inode *fdip;
1970 struct hammer_inode *tdip;
1971 struct hammer_inode *ip;
b0aab9b9 1972 hammer_mount_t hmp;
8cd0a023 1973 struct hammer_cursor cursor;
8cd0a023 1974 int64_t namekey;
5e435c92 1975 u_int32_t max_iterations;
11ad5ade 1976 int nlen, error;
8cd0a023 1977
f437a2ab
MD
1978 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1979 return(EXDEV);
1980 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1981 return(EXDEV);
1982
8cd0a023
MD
1983 fdip = VTOI(ap->a_fdvp);
1984 tdip = VTOI(ap->a_tdvp);
1985 fncp = ap->a_fnch->ncp;
1986 tncp = ap->a_tnch->ncp;
b3deaf57
MD
1987 ip = VTOI(fncp->nc_vp);
1988 KKASSERT(ip != NULL);
d113fda1 1989
b0aab9b9
MD
1990 hmp = ip->hmp;
1991
f437a2ab
MD
1992 if (fdip->obj_localization != tdip->obj_localization)
1993 return(EXDEV);
1994 if (fdip->obj_localization != ip->obj_localization)
1995 return(EXDEV);
1996
d113fda1
MD
1997 if (fdip->flags & HAMMER_INODE_RO)
1998 return (EROFS);
1999 if (tdip->flags & HAMMER_INODE_RO)
2000 return (EROFS);
2001 if (ip->flags & HAMMER_INODE_RO)
2002 return (EROFS);
b0aab9b9 2003 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 2004 return (error);
d113fda1 2005
b0aab9b9
MD
2006 lwkt_gettoken(&hmp->fs_token);
2007 hammer_start_transaction(&trans, hmp);
ce0138a6 2008 ++hammer_stats_file_iopsw;
8cd0a023
MD
2009
2010 /*
b3deaf57
MD
2011 * Remove tncp from the target directory and then link ip as
2012 * tncp. XXX pass trans to dounlink
42c7d26b
MD
2013 *
2014 * Force the inode sync-time to match the transaction so it is
2015 * in-sync with the creation of the target directory entry.
8cd0a023 2016 */
d7e278bb
MD
2017 error = hammer_dounlink(&trans, ap->a_tnch, ap->a_tdvp,
2018 ap->a_cred, 0, -1);
42c7d26b 2019 if (error == 0 || error == ENOENT) {
5a930e66
MD
2020 error = hammer_ip_add_directory(&trans, tdip,
2021 tncp->nc_name, tncp->nc_nlen,
2022 ip);
42c7d26b
MD
2023 if (error == 0) {
2024 ip->ino_data.parent_obj_id = tdip->obj_id;
cc0758d0 2025 ip->ino_data.ctime = trans.time;
e98f1b96 2026 hammer_modify_inode(&trans, ip, HAMMER_INODE_DDIRTY);
42c7d26b
MD
2027 }
2028 }
b3deaf57
MD
2029 if (error)
2030 goto failed; /* XXX */
8cd0a023
MD
2031
2032 /*
2033 * Locate the record in the originating directory and remove it.
2034 *
2035 * Calculate the namekey and setup the key range for the scan. This
2036 * works kinda like a chained hash table where the lower 32 bits
2037 * of the namekey synthesize the chain.
2038 *
2039 * The key range is inclusive of both key_beg and key_end.
2040 */
5e435c92
MD
2041 namekey = hammer_directory_namekey(fdip, fncp->nc_name, fncp->nc_nlen,
2042 &max_iterations);
6a37e7e4 2043retry:
bcac4bbb 2044 hammer_init_cursor(&trans, &cursor, &fdip->cache[1], fdip);
5a930e66 2045 cursor.key_beg.localization = fdip->obj_localization +
beec5dc4 2046 hammer_dir_localization(fdip);
8cd0a023
MD
2047 cursor.key_beg.obj_id = fdip->obj_id;
2048 cursor.key_beg.key = namekey;
d5530d22 2049 cursor.key_beg.create_tid = 0;
8cd0a023
MD
2050 cursor.key_beg.delete_tid = 0;
2051 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
2052 cursor.key_beg.obj_type = 0;
2053
2054 cursor.key_end = cursor.key_beg;
5e435c92 2055 cursor.key_end.key += max_iterations;
d5530d22
MD
2056 cursor.asof = fdip->obj_asof;
2057 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
8cd0a023
MD
2058
2059 /*
2060 * Scan all matching records (the chain), locate the one matching
a89aec1b 2061 * the requested path component.
8cd0a023
MD
2062 *
2063 * The hammer_ip_*() functions merge in-memory records with on-disk
2064 * records for the purposes of the search.
2065 */
4e17f465 2066 error = hammer_ip_first(&cursor);
a89aec1b 2067 while (error == 0) {
8cd0a023
MD
2068 if (hammer_ip_resolve_data(&cursor) != 0)
2069 break;
11ad5ade
MD
2070 nlen = cursor.leaf->data_len - HAMMER_ENTRY_NAME_OFF;
2071 KKASSERT(nlen > 0);
2072 if (fncp->nc_nlen == nlen &&
2073 bcmp(fncp->nc_name, cursor.data->entry.name, nlen) == 0) {
8cd0a023
MD
2074 break;
2075 }
a89aec1b 2076 error = hammer_ip_next(&cursor);
8cd0a023 2077 }
8cd0a023
MD
2078
2079 /*
2080 * If all is ok we have to get the inode so we can adjust nlinks.
6a37e7e4
MD
2081 *
2082 * WARNING: hammer_ip_del_directory() may have to terminate the
2083 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
2084 * twice.
8cd0a023 2085 */
9944ae54 2086 if (error == 0)
6a37e7e4 2087 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
b84de5af
MD
2088
2089 /*
2090 * XXX A deadlock here will break rename's atomicy for the purposes
2091 * of crash recovery.
2092 */
2093 if (error == EDEADLK) {
b84de5af 2094 hammer_done_cursor(&cursor);
b84de5af
MD
2095 goto retry;
2096 }
2097
2098 /*
2099 * Cleanup and tell the kernel that the rename succeeded.
036ea0c3
MD
2100 *
2101 * NOTE: ip->vp, if non-NULL, cannot be directly referenced
2102 * without formally acquiring the vp since the vp might
2103 * have zero refs on it, or in the middle of a reclaim,
2104 * etc.
b84de5af 2105 */
c0ade690 2106 hammer_done_cursor(&cursor);
fbb84158 2107 if (error == 0) {
6a37e7e4 2108 cache_rename(ap->a_fnch, ap->a_tnch);
fbb84158
MD
2109 hammer_knote(ap->a_fdvp, NOTE_WRITE);
2110 hammer_knote(ap->a_tdvp, NOTE_WRITE);
036ea0c3
MD
2111 while (ip->vp) {
2112 struct vnode *vp;
2113
2114 error = hammer_get_vnode(ip, &vp);
2115 if (error == 0 && vp) {
2116 vn_unlock(vp);
2117 hammer_knote(ip->vp, NOTE_RENAME);
2118 vrele(vp);
2119 break;
2120 }
2121 kprintf("Debug: HAMMER ip/vp race2 avoided\n");
2122 }
fbb84158 2123 }
b84de5af 2124
b3deaf57 2125failed:
b84de5af 2126 hammer_done_transaction(&trans);
b0aab9b9 2127 lwkt_reltoken(&hmp->fs_token);
8cd0a023 2128 return (error);
427e5fc6
MD
2129}
2130
66325755
MD
2131/*
2132 * hammer_vop_nrmdir { nch, dvp, cred }
2133 */
427e5fc6
MD
2134static
2135int
66325755 2136hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
427e5fc6 2137{
b84de5af 2138 struct hammer_transaction trans;
e63644f0 2139 struct hammer_inode *dip;
b0aab9b9 2140 hammer_mount_t hmp;
b84de5af
MD
2141 int error;
2142
e63644f0 2143 dip = VTOI(ap->a_dvp);
b0aab9b9 2144 hmp = dip->hmp;
e63644f0
MD
2145
2146 if (hammer_nohistory(dip) == 0 &&
b0aab9b9 2147 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD
2148 return (error);
2149 }
2150
b0aab9b9
MD
2151 lwkt_gettoken(&hmp->fs_token);
2152 hammer_start_transaction(&trans, hmp);
ce0138a6 2153 ++hammer_stats_file_iopsw;
d7e278bb 2154 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp, ap->a_cred, 0, 1);
b84de5af 2155 hammer_done_transaction(&trans);
fbb84158
MD
2156 if (error == 0)
2157 hammer_knote(ap->a_dvp, NOTE_WRITE | NOTE_LINK);
b0aab9b9 2158 lwkt_reltoken(&hmp->fs_token);
b84de5af 2159 return (error);
427e5fc6
MD
2160}
2161
66325755 2162/*
349433c9
MD
2163 * hammer_vop_markatime { vp, cred }
2164 */
2165static
2166int
2167hammer_vop_markatime(struct vop_markatime_args *ap)
2168{
2169 struct hammer_transaction trans;
2170 struct hammer_inode *ip;
b0aab9b9 2171 hammer_mount_t hmp;
349433c9
MD
2172
2173 ip = VTOI(ap->a_vp);
2174 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
2175 return (EROFS);
2176 if (ip->flags & HAMMER_INODE_RO)
2177 return (EROFS);
b0aab9b9
MD
2178 hmp = ip->hmp;
2179 if (hmp->mp->mnt_flag & MNT_NOATIME)
349433c9 2180 return (0);
b0aab9b9
MD
2181 lwkt_gettoken(&hmp->fs_token);
2182 hammer_start_transaction(&trans, hmp);
349433c9
MD
2183 ++hammer_stats_file_iopsw;
2184
2185 ip->ino_data.atime = trans.time;
e98f1b96 2186 hammer_modify_inode(&trans, ip, HAMMER_INODE_ATIME);
349433c9
MD
2187 hammer_done_transaction(&trans);
2188 hammer_knote(ap->a_vp, NOTE_ATTRIB);
b0aab9b9 2189 lwkt_reltoken(&hmp->fs_token);
349433c9
MD
2190 return (0);
2191}
2192
2193/*
66325755
MD
2194 * hammer_vop_setattr { vp, vap, cred }
2195 */
427e5fc6
MD
2196static
2197int
66325755 2198hammer_vop_setattr(struct vop_setattr_args *ap)
427e5fc6 2199{
8cd0a023 2200 struct hammer_transaction trans;
8cd0a023 2201 struct hammer_inode *ip;
b0aab9b9
MD
2202 struct vattr *vap;
2203 hammer_mount_t hmp;
8cd0a023
MD
2204 int modflags;
2205 int error;
d5ef456e 2206 int truncating;
4a2796f3 2207 int blksize;
fbb84158 2208 int kflags;
6362a262 2209#if 0
4a2796f3 2210 int64_t aligned_size;
6362a262 2211#endif
8cd0a023 2212 u_int32_t flags;
8cd0a023
MD
2213
2214 vap = ap->a_vap;
2215 ip = ap->a_vp->v_data;
2216 modflags = 0;
fbb84158 2217 kflags = 0;
b0aab9b9 2218 hmp = ip->hmp;
8cd0a023
MD
2219
2220 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
2221 return(EROFS);
d113fda1
MD
2222 if (ip->flags & HAMMER_INODE_RO)
2223 return (EROFS);
e63644f0 2224 if (hammer_nohistory(ip) == 0 &&
b0aab9b9 2225 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_REMOVE)) != 0) {
e63644f0
MD
2226 return (error);
2227 }
8cd0a023 2228
b0aab9b9
MD
2229 lwkt_gettoken(&hmp->fs_token);
2230 hammer_start_transaction(&trans, hmp);
ce0138a6 2231 ++hammer_stats_file_iopsw;
8cd0a023
MD
2232 error = 0;
2233
2234 if (vap->va_flags != VNOVAL) {
2235 flags = ip->ino_data.uflags;
2236 error = vop_helper_setattr_flags(&flags, vap->va_flags,
2237 hammer_to_unix_xid(&ip->ino_data.uid),
2238 ap->a_cred);
2239 if (error == 0) {
2240 if (ip->ino_data.uflags != flags) {
2241 ip->ino_data.uflags = flags;
cc0758d0 2242 ip->ino_data.ctime = trans.time;
8cd0a023 2243 modflags |= HAMMER_INODE_DDIRTY;
fbb84158 2244 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2245 }
2246 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
2247 error = 0;
2248 goto done;
2249 }
2250 }
2251 goto done;
2252 }
2253 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
2254 error = EPERM;
2255 goto done;
2256 }
7538695e
MD
2257 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
2258 mode_t cur_mode = ip->ino_data.mode;
2259 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
2260 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
2261 uuid_t uuid_uid;
2262 uuid_t uuid_gid;
2263
2264 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
2265 ap->a_cred,
2266 &cur_uid, &cur_gid, &cur_mode);
2267 if (error == 0) {
2268 hammer_guid_to_uuid(&uuid_uid, cur_uid);
2269 hammer_guid_to_uuid(&uuid_gid, cur_gid);
2270 if (bcmp(&uuid_uid, &ip->ino_data.uid,
2271 sizeof(uuid_uid)) ||
2272 bcmp(&uuid_gid, &ip->ino_data.gid,
2273 sizeof(uuid_gid)) ||
2274 ip->ino_data.mode != cur_mode
2275 ) {
2276 ip->ino_data.uid = uuid_uid;
2277 ip->ino_data.gid = uuid_gid;
2278 ip->ino_data.mode = cur_mode;
cc0758d0
MD
2279 ip->ino_data.ctime = trans.time;
2280 modflags |= HAMMER_INODE_DDIRTY;
7538695e 2281 }
fbb84158 2282 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2283 }
2284 }
11ad5ade 2285 while (vap->va_size != VNOVAL && ip->ino_data.size != vap->va_size) {
8cd0a023
MD
2286 switch(ap->a_vp->v_type) {
2287 case VREG:
11ad5ade 2288 if (vap->va_size == ip->ino_data.size)
d5ef456e 2289 break;
47f363f1
MD
2290
2291 /*
c58123da
MD
2292 * Log the operation if in fast-fsync mode or if
2293 * there are unterminated redo write records present.
2294 *
2295 * The second check is needed so the recovery code
2296 * properly truncates write redos even if nominal
2297 * REDO operations is turned off due to excessive
2298 * writes, because the related records might be
2299 * destroyed and never lay down a TERM_WRITE.
47f363f1 2300 */
c58123da
MD
2301 if ((ip->flags & HAMMER_INODE_REDO) ||
2302 (ip->flags & HAMMER_INODE_RDIRTY)) {
47f363f1
MD
2303 error = hammer_generate_redo(&trans, ip,
2304 vap->va_size,
2305 HAMMER_REDO_TRUNC,
2306 NULL, 0);
2307 }
2308 blksize = hammer_blocksize(vap->va_size);
2309
b84de5af
MD
2310 /*
2311 * XXX break atomicy, we can deadlock the backend
2312 * if we do not release the lock. Probably not a
2313 * big deal here.
2314 */
11ad5ade 2315 if (vap->va_size < ip->ino_data.size) {
6362a262
MD
2316 nvtruncbuf(ap->a_vp, vap->va_size,
2317 blksize,
753df37e
MD
2318 hammer_blockoff(vap->va_size),
2319 0);
d5ef456e 2320 truncating = 1;
fbb84158 2321 kflags |= NOTE_WRITE;
d5ef456e 2322 } else {
6362a262
MD
2323 nvextendbuf(ap->a_vp,
2324 ip->ino_data.size,
2325 vap->va_size,
2326 hammer_blocksize(ip->ino_data.size),
2327 hammer_blocksize(vap->va_size),
2328 hammer_blockoff(ip->ino_data.size),
2329 hammer_blockoff(vap->va_size),
2330 0);
d5ef456e 2331 truncating = 0;
fbb84158 2332 kflags |= NOTE_WRITE | NOTE_EXTEND;
c0ade690 2333 }
11ad5ade 2334 ip->ino_data.size = vap->va_size;
cc0758d0 2335 ip->ino_data.mtime = trans.time;
47f363f1 2336 /* XXX safe to use SDIRTY instead of DDIRTY here? */
cc0758d0 2337 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
d5ef456e 2338
b84de5af 2339 /*
6362a262
MD
2340 * On-media truncation is cached in the inode until
2341 * the inode is synchronized. We must immediately
2342 * handle any frontend records.
b84de5af 2343 */
d5ef456e 2344 if (truncating) {
47637bff 2345 hammer_ip_frontend_trunc(ip, vap->va_size);
0832c9bb
MD
2346#ifdef DEBUG_TRUNCATE
2347 if (HammerTruncIp == NULL)
2348 HammerTruncIp = ip;
2349#endif
b84de5af
MD
2350 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
2351 ip->flags |= HAMMER_INODE_TRUNCATED;
2352 ip->trunc_off = vap->va_size;
0832c9bb
MD
2353#ifdef DEBUG_TRUNCATE
2354 if (ip == HammerTruncIp)
973c11b9
MD
2355 kprintf("truncate1 %016llx\n",
2356 (long long)ip->trunc_off);
0832c9bb 2357#endif
b84de5af
MD
2358 } else if (ip->trunc_off > vap->va_size) {
2359 ip->trunc_off = vap->va_size;
0832c9bb
MD
2360#ifdef DEBUG_TRUNCATE
2361 if (ip == HammerTruncIp)
973c11b9
MD
2362 kprintf("truncate2 %016llx\n",
2363 (long long)ip->trunc_off);
0832c9bb
MD
2364#endif
2365 } else {
2366#ifdef DEBUG_TRUNCATE
2367 if (ip == HammerTruncIp)
973c11b9
MD
2368 kprintf("truncate3 %016llx (ignored)\n",
2369 (long long)vap->va_size);
0832c9bb 2370#endif
b84de5af 2371 }
d5ef456e 2372 }
b84de5af 2373
6362a262 2374#if 0
d5ef456e 2375 /*
6362a262
MD
2376 * When truncating, nvtruncbuf() may have cleaned out
2377 * a portion of the last block on-disk in the buffer
2378 * cache. We must clean out any frontend records
2379 * for blocks beyond the new last block.
d5ef456e 2380 */
4a2796f3
MD
2381 aligned_size = (vap->va_size + (blksize - 1)) &
2382 ~(int64_t)(blksize - 1);
b84de5af 2383 if (truncating && vap->va_size < aligned_size) {
4a2796f3 2384 aligned_size -= blksize;
47637bff 2385 hammer_ip_frontend_trunc(ip, aligned_size);
d5ef456e 2386 }
6362a262 2387#endif
76376933 2388 break;
8cd0a023 2389 case VDATABASE:
b84de5af
MD
2390 if ((ip->flags & HAMMER_INODE_TRUNCATED) == 0) {
2391 ip->flags |= HAMMER_INODE_TRUNCATED;
2392 ip->trunc_off = vap->va_size;
2393 } else if (ip->trunc_off > vap->va_size) {
2394 ip->trunc_off = vap->va_size;
2395 }
47637bff 2396 hammer_ip_frontend_trunc(ip, vap->va_size);
11ad5ade 2397 ip->ino_data.size = vap->va_size;
cc0758d0
MD
2398 ip->ino_data.mtime = trans.time;
2399 modflags |= HAMMER_INODE_MTIME | HAMMER_INODE_DDIRTY;
fbb84158 2400 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2401 break;
2402 default:
2403 error = EINVAL;
2404 goto done;
2405 }
d26d0ae9 2406 break;
8cd0a023
MD
2407 }
2408 if (vap->va_atime.tv_sec != VNOVAL) {
cc0758d0 2409 ip->ino_data.atime = hammer_timespec_to_time(&vap->va_atime);
ddfdf542 2410 modflags |= HAMMER_INODE_ATIME;
fbb84158 2411 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2412 }
2413 if (vap->va_mtime.tv_sec != VNOVAL) {
cc0758d0 2414 ip->ino_data.mtime = hammer_timespec_to_time(&vap->va_mtime);
ddfdf542 2415 modflags |= HAMMER_INODE_MTIME;
fbb84158 2416 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2417 }
2418 if (vap->va_mode != (mode_t)VNOVAL) {
7538695e
MD
2419 mode_t cur_mode = ip->ino_data.mode;
2420 uid_t cur_uid = hammer_to_unix_xid(&ip->ino_data.uid);
2421 gid_t cur_gid = hammer_to_unix_xid(&ip->ino_data.gid);
2422
2423 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
2424 cur_uid, cur_gid, &cur_mode);
2425 if (error == 0 && ip->ino_data.mode != cur_mode) {
2426 ip->ino_data.mode = cur_mode;
cc0758d0 2427 ip->ino_data.ctime = trans.time;
8cd0a023 2428 modflags |= HAMMER_INODE_DDIRTY;
fbb84158 2429 kflags |= NOTE_ATTRIB;
8cd0a023
MD
2430 }
2431 }
2432done:
b84de5af 2433 if (error == 0)
e98f1b96 2434 hammer_modify_inode(&trans, ip, modflags);
b84de5af 2435 hammer_done_transaction(&trans);
fbb84158 2436 hammer_knote(ap->a_vp, kflags);
b0aab9b9 2437 lwkt_reltoken(&hmp->fs_token);
8cd0a023 2438 return (error);
427e5fc6
MD
2439}
2440
66325755
MD
2441/*
2442 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
2443 */
427e5fc6
MD
2444static
2445int
66325755 2446hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
427e5fc6 2447{
7a04d74f
MD
2448 struct hammer_transaction trans;
2449 struct hammer_inode *dip;
2450 struct hammer_inode *nip;
7a04d74f 2451 hammer_record_t record;
b0aab9b9
MD
2452 struct nchandle *nch;
2453 hammer_mount_t hmp;
7a04d74f
MD
2454 int error;
2455 int bytes;
2456
2457 ap->a_vap->va_type = VLNK;
2458
2459 nch = ap->a_nch;
2460 dip = VTOI(ap->a_dvp);
b0aab9b9 2461 hmp = dip->hmp;
7a04d74f 2462
d113fda1
MD
2463 if (dip->flags & HAMMER_INODE_RO)
2464 return (EROFS);
b0aab9b9 2465 if ((error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0)
e63644f0 2466 return (error);
d113fda1 2467
7a04d74f
MD
2468 /*
2469 * Create a transaction to cover the operations we perform.
2470 */
b0aab9b9
MD
2471 lwkt_gettoken(&hmp->fs_token);
2472 hammer_start_transaction(&trans, hmp);
ce0138a6 2473 ++hammer_stats_file_iopsw;
7a04d74f
MD
2474
2475 /*
2476 * Create a new filesystem object of the requested type. The
2477 * returned inode will be referenced but not locked.
2478 */
2479
5a930e66 2480 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred,
5a64efa1
MD
2481 dip, nch->ncp->nc_name, nch->ncp->nc_nlen,
2482 NULL, &nip);
7a04d74f 2483 if (error) {
b84de5af 2484 hammer_done_transaction(&trans);
7a04d74f 2485 *ap->a_vpp = NULL;
b0aab9b9 2486 lwkt_reltoken(&hmp->fs_token);
7a04d74f
MD
2487 return (error);
2488 }
2489
2490 /*
7a04d74f
MD
2491 * Add a record representing the symlink. symlink stores the link
2492 * as pure data, not a string, and is no \0 terminated.
2493 */
2494 if (error == 0) {
7a04d74f
MD
2495 bytes = strlen(ap->a_target);
2496
2f85fa4d
MD
2497 if (bytes <= HAMMER_INODE_BASESYMLEN) {
2498 bcopy(ap->a_target, nip->ino_data.ext.symlink, bytes);
2499 } else {
2500 record = hammer_alloc_mem_record(nip, bytes);
2501 record->type = HAMMER_MEM_RECORD_GENERAL;
2502
5a930e66
MD
2503 record->leaf.base.localization = nip->obj_localization +
2504 HAMMER_LOCALIZE_MISC;
2f85fa4d
MD
2505 record->leaf.base.key = HAMMER_FIXKEY_SYMLINK;
2506 record->leaf.base.rec_type = HAMMER_RECTYPE_FIX;
2507 record->leaf.data_len = bytes;
2508 KKASSERT(HAMMER_SYMLINK_NAME_OFF == 0);
2509 bcopy(ap->a_target, record->data->symlink.name, bytes);
2510 error = hammer_ip_add_record(&trans, record);
2511 }
42c7d26b
MD
2512
2513 /*
2514 * Set the file size to the length of the link.
2515 */
2516 if (error == 0) {
11ad5ade 2517 nip->ino_data.size = bytes;
e98f1b96 2518 hammer_modify_inode(&trans, nip, HAMMER_INODE_DDIRTY);
42c7d26b 2519 }
7a04d74f 2520 }
1f07f686 2521 if (error == 0)
5a930e66
MD
2522 error = hammer_ip_add_directory(&trans, dip, nch->ncp->nc_name,
2523 nch->ncp->nc_nlen, nip);
7a04d74f
MD
2524
2525 /*
2526 * Finish up.
2527 */
2528 if (error) {
2529 hammer_rel_inode(nip, 0);
7a04d74f
MD
2530 *ap->a_vpp = NULL;
2531 } else {
e8599db1 2532 error = hammer_get_vnode(nip, ap->a_vpp);
7a04d74f
MD
2533 hammer_rel_inode(nip, 0);
2534 if (error == 0) {
2535 cache_setunresolved(ap->a_nch);
2536 cache_setvp(ap->a_nch, *ap->a_vpp);
fbb84158 2537 hammer_knote(ap->a_dvp, NOTE_WRITE);
7a04d74f
MD
2538 }
2539 }
b84de5af 2540 hammer_done_transaction(&trans);
b0aab9b9 2541 lwkt_reltoken(&hmp->fs_token);
7a04d74f 2542 return (error);
427e5fc6
MD
2543}
2544
66325755
MD
2545/*
2546 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2547 */
427e5fc6
MD
2548static
2549int
66325755 2550hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
427e5fc6 2551{
b84de5af 2552 struct hammer_transaction trans;
e63644f0 2553 struct hammer_inode *dip;
b0aab9b9 2554 hammer_mount_t hmp;
b84de5af
MD
2555 int error;
2556
e63644f0 2557 dip = VTOI(ap->a_dvp);
b0aab9b9 2558 hmp = dip->hmp;
e63644f0
MD
2559
2560 if (hammer_nohistory(dip) == 0 &&
b0aab9b9 2561 (error = hammer_checkspace(hmp, HAMMER_CHKSPC_CREATE)) != 0) {
e63644f0
MD
2562 return (error);
2563 }
2564
b0aab9b9
MD
2565 lwkt_gettoken(&hmp->fs_token);
2566 hammer_start_transaction(&trans, hmp);
ce0138a6 2567 ++hammer_stats_file_iopsw;
b84de5af 2568 error = hammer_dounlink(&trans, ap->a_nch, ap->a_dvp,
d7e278bb 2569 ap->a_cred, ap->a_flags, -1);
b84de5af 2570 hammer_done_transaction(&trans);
b0aab9b9 2571 lwkt_reltoken(&hmp->fs_token);
b84de5af
MD
2572
2573 return (error);
427e5fc6
MD
2574}
2575
66325755 2576/*
7dc57964
MD
2577 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2578 */
2579static
2580int
2581hammer_vop_ioctl(struct vop_ioctl_args *ap)
2582{
2583 struct hammer_inode *ip = ap->a_vp->v_data;
b0aab9b9
MD
2584 hammer_mount_t hmp = ip->hmp;
2585 int error;
7dc57964 2586
ce0138a6 2587 ++hammer_stats_file_iopsr;
b0aab9b9
MD
2588 lwkt_gettoken(&hmp->fs_token);
2589 error = hammer_ioctl(ip, ap->a_command, ap->a_data,
2590 ap->a_fflag, ap->a_cred);
2591 lwkt_reltoken(&hmp->fs_token);
2592 return (error);
7dc57964
MD
2593}
2594
513ca7d7
MD
2595static
2596int
2597hammer_vop_mountctl(struct vop_mountctl_args *ap)
2598{
dad088a5
MD
2599 static const struct mountctl_opt extraopt[] = {
2600 { HMNT_NOHISTORY, "nohistory" },
2601 { HMNT_MASTERID, "master" },
2602 { 0, NULL}
2603
2604 };
2605 struct hammer_mount *hmp;
513ca7d7 2606 struct mount *mp;
dad088a5 2607 int usedbytes;
513ca7d7
MD
2608 int error;
2609
dad088a5
MD
2610 error = 0;
2611 usedbytes = 0;
513ca7d7 2612 mp = ap->a_head.a_ops->head.vv_mount;
dad088a5
MD
2613 KKASSERT(mp->mnt_data != NULL);
2614 hmp = (struct hammer_mount *)mp->mnt_data;
513ca7d7 2615
b0aab9b9 2616 lwkt_gettoken(&hmp->fs_token);
dad088a5 2617
b0aab9b9 2618 switch(ap->a_op) {
513ca7d7
MD
2619 case MOUNTCTL_SET_EXPORT:
2620 if (ap->a_ctllen != sizeof(struct export_args))
2621 error = EINVAL;
b424ca30
MD
2622 else
2623 error = hammer_vfs_export(mp, ap->a_op,
513ca7d7
MD
2624 (const struct export_args *)ap->a_ctl);
2625 break;
dad088a5
MD
2626 case MOUNTCTL_MOUNTFLAGS:
2627 {
2628 /*
2629 * Call standard mountctl VOP function
2630 * so we get user mount flags.
2631 */
2632 error = vop_stdmountctl(ap);
2633 if (error)
2634 break;
2635
2636 usedbytes = *ap->a_res;
2637
eac446c5 2638 if (usedbytes > 0 && usedbytes < ap->a_buflen) {
b0aab9b9
MD
2639 usedbytes += vfs_flagstostr(hmp->hflags, extraopt,
2640 ap->a_buf,
dad088a5
MD
2641 ap->a_buflen - usedbytes,
2642 &error);
dad088a5
MD
2643 }
2644
2645 *ap->a_res += usedbytes;
2646 break;
2647 }
513ca7d7 2648 default:
726e0641 2649 error = vop_stdmountctl(ap);
513ca7d7
MD
2650 break;
2651 }
b0aab9b9 2652 lwkt_reltoken(&hmp->fs_token);
513ca7d7
MD
2653 return(error);
2654}
2655
7dc57964 2656/*
66325755 2657 * hammer_vop_strategy { vp, bio }
8cd0a023
MD
2658 *
2659 * Strategy call, used for regular file read & write only. Note that the
2660 * bp may represent a cluster.
2661 *
2662 * To simplify operation and allow better optimizations in the future,
2663 * this code does not make any assumptions with regards to buffer alignment
2664 * or size.
66325755 2665 */
427e5fc6
MD
2666static
2667int
66325755 2668hammer_vop_strategy(struct vop_strategy_args *ap)
427e5fc6 2669{
8cd0a023
MD
2670 struct buf *bp;
2671 int error;
2672
2673 bp = ap->a_bio->bio_buf;
2674
2675 switch(bp->b_cmd) {
2676 case BUF_CMD_READ:
2677 error = hammer_vop_strategy_read(ap);
2678 break;
2679 case BUF_CMD_WRITE:
2680 error = hammer_vop_strategy_write(ap);
2681 break;
2682 default:
059819e3
MD
2683 bp->b_error = error = EINVAL;
2684 bp->b_flags |= B_ERROR;
2685 biodone(ap->a_bio);
8cd0a023
MD
2686 break;
2687 }
507df98a
ID
2688
2689 /* hammer_dump_dedup_cache(((hammer_inode_t)ap->a_vp->v_data)->hmp); */
2690
8cd0a023 2691 return (error);
427e5fc6
MD
2692}
2693
8cd0a023
MD
2694/*
2695 * Read from a regular file. Iterate the related records and fill in the
2696 * BIO/BUF. Gaps are zero-filled.
2697 *
2698 * The support code in hammer_object.c should be used to deal with mixed
2699 * in-memory and on-disk records.
2700 *
4a2796f3
MD
2701 * NOTE: Can be called from the cluster code with an oversized buf.
2702 *
8cd0a023
MD
2703 * XXX atime update
2704 */
2705static
2706int
2707hammer_vop_strategy_read(struct vop_strategy_args *ap)
2708{
36f82b23
MD
2709 struct hammer_transaction trans;
2710 struct hammer_inode *ip;
39d8fd63 2711 struct hammer_inode *dip;
b0aab9b9 2712 hammer_mount_t hmp;
8cd0a023 2713 struct hammer_cursor cursor;
8cd0a023 2714 hammer_base_elm_t base;
4a2796f3 2715 hammer_off_t disk_offset;
8cd0a023 2716 struct bio *bio;
a99b9ea2 2717 struct bio *nbio;
8cd0a023
MD
2718 struct buf *bp;
2719 int64_t rec_offset;
a89aec1b 2720 int64_t ran_end;
195c19a1 2721 int64_t tmp64;
8cd0a023
MD
2722 int error;
2723 int boff;
2724 int roff;
2725 int n;
b4f86ea3 2726 int isdedupable;
8cd0a023
MD
2727
2728 bio = ap->a_bio;
2729 bp = bio->bio_buf;
36f82b23 2730 ip = ap->a_vp->v_data;
b0aab9b9 2731 hmp = ip->hmp;
8cd0a023 2732
a99b9ea2
MD
2733 /*
2734 * The zone-2 disk offset may have been set by the cluster code via
4a2796f3 2735 * a BMAP operation, or else should be NOOFFSET.
a99b9ea2 2736 *
4a2796f3 2737 * Checking the high bits for a match against zone-2 should suffice.
b4f86ea3
MD
2738 *
2739 * In cases where a lot of data duplication is present it may be
2740 * more beneficial to drop through and doubule-buffer through the
2741 * device.
a99b9ea2
MD
2742 */
2743 nbio = push_bio(bio);
9a98f3cc 2744 if ((nbio->bio_offset & HAMMER_OFF_ZONE_MASK) ==
1b0ab2c3 2745 HAMMER_ZONE_LARGE_DATA) {
9a98f3cc
MD
2746 if (hammer_double_buffer == 0) {
2747 lwkt_gettoken(&hmp->fs_token);
2748 error = hammer_io_direct_read(hmp, nbio, NULL);
2749 lwkt_reltoken(&hmp->fs_token);
2750 return (error);
2751 }
2752
2753 /*
2754 * Try to shortcut requests for double_buffer mode too.
2755 * Since this mode runs through the device buffer cache
2756 * only compatible buffer sizes (meaning those generated
2757 * by normal filesystem buffers) are legal.
2758 */
2759 if (hammer_live_dedup == 0 && (bp->b_flags & B_PAGING) == 0) {
2760 error = hammer_io_indirect_read(hmp, nbio, NULL);
2761 return (error);
2762 }
a99b9ea2
MD
2763 }
2764
2765 /*
4a2796f3
MD
2766 * Well, that sucked. Do it the hard way. If all the stars are
2767 * aligned we may still be able to issue a direct-read.
a99b9ea2 2768 */
b0aab9b9
MD
2769 lwkt_gettoken(&hmp->fs_token);
2770 hammer_simple_transaction(&trans, hmp);
47637bff 2771 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
8cd0a023
MD
2772
2773 /*
2774 * Key range (begin and end inclusive) to scan. Note that the key's
c0ade690
MD
2775 * stored in the actual records represent BASE+LEN, not BASE. The
2776 * first record containing bio_offset will have a key > bio_offset.
8cd0a023 2777 */
5a930e66
MD
2778 cursor.key_beg.localization = ip->obj_localization +
2779 HAMMER_LOCALIZE_MISC;
8cd0a023 2780 cursor.key_beg.obj_id = ip->obj_id;
d5530d22 2781 cursor.key_beg.create_tid = 0;
8cd0a023 2782 cursor.key_beg.delete_tid = 0;
8cd0a023 2783 cursor.key_beg.obj_type = 0;
c0ade690 2784 cursor.key_beg.key = bio->bio_offset + 1;
d5530d22 2785 cursor.asof = ip->obj_asof;
bf3b416b 2786 cursor.flags |= HAMMER_CURSOR_ASOF;
8cd0a023
MD
2787
2788 cursor.key_end = cursor.key_beg;
11ad5ade 2789 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
b84de5af 2790#if 0
11ad5ade 2791 if (ip->ino_data.obj_type == HAMMER_OBJTYPE_DBFILE) {
a89aec1b
MD
2792 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
2793 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
2794 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
b84de5af
MD
2795 } else
2796#endif
2797 {
c0ade690 2798 ran_end = bio->bio_offset + bp->b_bufsize;
a89aec1b
MD
2799 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
2800 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
195c19a1
MD
2801 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
2802 if (tmp64 < ran_end)
a89aec1b
MD
2803 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
2804 else
7f7c1f84 2805 cursor.key_end.key = ran_end + MAXPHYS + 1;
a89aec1b 2806 }
d26d0ae9 2807 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
8cd0a023 2808
18bee4a2
MD
2809 /*
2810 * Set NOSWAPCACHE for cursor data extraction if double buffering
2811 * is disabled or (if the file is not marked cacheable via chflags
2812 * and vm.swapcache_use_chflags is enabled).
2813 */
2814 if (hammer_double_buffer == 0 ||
2815 ((ap->a_vp->v_flag & VSWAPCACHE) == 0 &&
2816 vm_swapcache_use_chflags)) {
2817 cursor.flags |= HAMMER_CURSOR_NOSWAPCACHE;
2818 }
2819
4e17f465 2820 error = hammer_ip_first(&cursor);
8cd0a023
MD
2821 boff = 0;
2822
a89aec1b 2823 while (error == 0) {
47637bff
MD
2824 /*
2825 * Get the base file offset of the record. The key for
2826 * data records is (base + bytes) rather then (base).
2827 */
11ad5ade 2828 base = &cursor.leaf->base;
11ad5ade 2829 rec_offset = base->key - cursor.leaf->data_len;
8cd0a023 2830
66325755 2831 /*
a89aec1b 2832 * Calculate the gap, if any, and zero-fill it.
1fef775e
MD
2833 *
2834 * n is the offset of the start of the record verses our
2835 * current seek offset in the bio.
66325755 2836 */
8cd0a023
MD
2837 n = (int)(rec_offset - (bio->bio_offset + boff));
2838 if (n > 0) {
a89aec1b
MD
2839 if (n > bp->b_bufsize - boff)
2840 n = bp->b_bufsize - boff;
8cd0a023
MD
2841 bzero((char *)bp->b_data + boff, n);
2842 boff += n;
2843 n = 0;
66325755 2844 }
8cd0a023
MD
2845
2846 /*
2847 * Calculate the data offset in the record and the number
2848 * of bytes we can copy.
a89aec1b 2849 *
1fef775e
MD
2850 * There are two degenerate cases. First, boff may already
2851 * be at bp->b_bufsize. Secondly, the data offset within
2852 * the record may exceed the record's size.
8cd0a023
MD
2853 */
2854 roff = -n;
b84de5af 2855 rec_offset += roff;
11ad5ade 2856 n = cursor.leaf->data_len - roff;
1fef775e
MD
2857 if (n <= 0) {
2858 kprintf("strategy_read: bad n=%d roff=%d\n", n, roff);
2859 n = 0;
2860 } else if (n > bp->b_bufsize - boff) {
8cd0a023 2861 n = bp->b_bufsize - boff;
1fef775e 2862 }
059819e3 2863
b84de5af 2864 /*
47637bff
MD
2865 * Deal with cached truncations. This cool bit of code
2866 * allows truncate()/ftruncate() to avoid having to sync
2867 * the file.
2868 *
2869 * If the frontend is truncated then all backend records are
2870 * subject to the frontend's truncation.
2871 *
2872 * If the backend is truncated then backend records on-disk
2873 * (but not in-memory) are subject to the backend's
2874 * truncation. In-memory records owned by the backend
2875 * represent data written after the truncation point on the
2876 * backend and must not be truncated.
2877 *
2878 * Truncate operations deal with frontend buffer cache
2879 * buffers and frontend-owned in-memory records synchronously.
b84de5af 2880 */
47637bff 2881 if (ip->flags & HAMMER_INODE_TRUNCATED) {
6362a262
MD
2882 if (hammer_cursor_ondisk(&cursor)/* ||
2883 cursor.iprec->flush_state == HAMMER_FST_FLUSH*/) {
47637bff
MD
2884 if (ip->trunc_off <= rec_offset)
2885 n = 0;
2886 else if (ip->trunc_off < rec_offset + n)
2887 n = (int)(ip->trunc_off - rec_offset);
2888 }
2889 }
2890 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
2891 if (hammer_cursor_ondisk(&cursor)) {
2892 if (ip->sync_trunc_off <= rec_offset)
2893 n = 0;
2894 else if (ip->sync_trunc_off < rec_offset + n)
2895 n = (int)(ip->sync_trunc_off - rec_offset);
2896 }
2897 }
b84de5af
MD
2898
2899 /*
47637bff
MD
2900 * Try to issue a direct read into our bio if possible,
2901 * otherwise resolve the element data into a hammer_buffer
2902 * and copy.
4a2796f3
MD
2903 *
2904 * The buffer on-disk should be zerod past any real
2905 * truncation point, but may not be for any synthesized
2906 * truncation point from above.
9a98f3cc
MD
2907 *
2908 * NOTE: disk_offset is only valid if the cursor data is
2909 * on-disk.
b84de5af 2910 */
1b0ab2c3 2911 disk_offset = cursor.leaf->data_offset + roff;
b4f86ea3
MD
2912 isdedupable = (boff == 0 && n == bp->b_bufsize &&
2913 hammer_cursor_ondisk(&cursor) &&
2914 ((int)disk_offset & HAMMER_BUFMASK) == 0);
2915
2916 if (isdedupable && hammer_double_buffer == 0) {
9a98f3cc
MD
2917 /*
2918 * Direct read case
2919 */
1b0ab2c3
MD
2920 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2921 HAMMER_ZONE_LARGE_DATA);
4a2796f3 2922 nbio->bio_offset = disk_offset;
b0aab9b9 2923 error = hammer_io_direct_read(hmp, nbio, cursor.leaf);
b4f86ea3 2924 if (hammer_live_dedup && error == 0)
507df98a 2925 hammer_dedup_cache_add(ip, cursor.leaf);
47637bff 2926 goto done;
9a98f3cc
MD
2927 } else if (isdedupable) {
2928 /*
2929 * Async I/O case for reading from backing store
2930 * and copying the data to the filesystem buffer.
2931 * live-dedup has to verify the data anyway if it
2932 * gets a hit later so we can just add the entry
2933 * now.
2934 */
2935 KKASSERT((disk_offset & HAMMER_OFF_ZONE_MASK) ==
2936 HAMMER_ZONE_LARGE_DATA);
2937 nbio->bio_offset = disk_offset;
2938 if (hammer_live_dedup)
2939 hammer_dedup_cache_add(ip, cursor.leaf);
2940 error = hammer_io_indirect_read(hmp, nbio, cursor.leaf);
2941 goto done;
47637bff
MD
2942 } else if (n) {
2943 error = hammer_ip_resolve_data(&cursor);
2944 if (error == 0) {
b4f86ea3
MD
2945 if (hammer_live_dedup && isdedupable)
2946 hammer_dedup_cache_add(ip, cursor.leaf);
47637bff
MD
2947 bcopy((char *)cursor.data + roff,
2948 (char *)bp->b_data + boff, n);
2949 }
b84de5af 2950 }
47637bff
MD
2951 if (error)
2952 break;
2953
2954 /*
507df98a
ID
2955 * We have to be sure that the only elements added to the
2956 * dedup cache are those which are already on-media.
2957 */
2958 if (hammer_live_dedup && hammer_cursor_ondisk(&cursor))
2959 hammer_dedup_cache_add(ip, cursor.leaf);
2960
2961 /*
47637bff
MD
2962 * Iterate until we have filled the request.
2963 */
2964 boff += n;
8cd0a023 2965 if (boff == bp->b_bufsize)
66325755 2966 break;
a89aec1b 2967 error = hammer_ip_next(&cursor);
66325755
MD
2968 }
2969
2970 /*
8cd0a023 2971 * There may have been a gap after the last record
66325755 2972 */
8cd0a023
MD
2973 if (error == ENOENT)
2974 error = 0;
2975 if (error == 0 && boff != bp->b_bufsize) {
7f7c1f84 2976 KKASSERT(boff < bp->b_bufsize);
8cd0a023
MD
2977 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
2978 /* boff = bp->b_bufsize; */
2979 }
18bee4a2
MD
2980
2981 /*
2982 * Disallow swapcache operation on the vnode buffer if double
2983 * buffering is enabled, the swapcache will get the data via
2984 * the block device buffer.
2985 */
2986 if (hammer_double_buffer)
2987 bp->b_flags |= B_NOTMETA;
2988
2989 /*
2990 * Cleanup
2991 */
8cd0a023 2992 bp->b_resid = 0;
059819e3
MD
2993 bp->b_error = error;
2994 if (error)
2995 bp->b_flags |= B_ERROR;
2996 biodone(ap->a_bio);
47637bff
MD
2997
2998done:
39d8fd63
MD
2999 /*
3000 * Cache the b-tree node for the last data read in cache[1].
3001 *
3002 * If we hit the file EOF then also cache the node in the
3003 * governing director's cache[3], it will be used to initialize
3004 * the inode's cache[1] for any inodes looked up via the directory.
3005 *
3006 * This doesn't reduce disk accesses since the B-Tree chain is
3007 * likely cached, but it does reduce cpu overhead when looking
3008 * up file offsets for cpdup/tar/cpio style iterations.
3009 */
47637bff 3010 if (cursor.node)
bcac4bbb 3011 hammer_cache_node(&ip->cache[1], cursor.node);
39d8fd63
MD
3012 if (ran_end >= ip->ino_data.size) {
3013 dip = hammer_find_inode(&trans, ip->ino_data.parent_obj_id,
3014 ip->obj_asof, ip->obj_localization);
3015 if (dip) {
3016 hammer_cache_node(&dip->cache[3], cursor.node);
3017 hammer_rel_inode(dip, 0);
3018 }
3019 }
47637bff
MD
3020 hammer_done_cursor(&cursor);
3021 hammer_done_transaction(&trans);
b0aab9b9 3022 lwkt_reltoken(&hmp->fs_token);
8cd0a023
MD
3023 return(error);
3024}
3025
3026/*
a99b9ea2
MD
3027 * BMAP operation - used to support cluster_read() only.
3028 *
3029 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
3030 *
3031 * This routine may return EOPNOTSUPP if the opration is not supported for
3032 * the specified offset. The contents of the pointer arguments do not
3033 * need to be initialized in that case.
3034 *
3035 * If a disk address is available and properly aligned return 0 with
3036 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
3037 * to the run-length relative to that offset. Callers may assume that
3038 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
3039 * large, so return EOPNOTSUPP if it is not sufficiently large.
3040 */
3041static
3042int
3043hammer_vop_bmap(struct vop_bmap_args *ap)
3044{
3045 struct hammer_transaction trans;
3046 struct hammer_inode *ip;
b0aab9b9 3047 hammer_mount_t hmp;
a99b9ea2
MD
3048 struct hammer_cursor cursor;
3049 hammer_base_elm_t base;
3050 int64_t rec_offset;
3051 int64_t ran_end;
3052 int64_t tmp64;
3053 int64_t base_offset;
3054 int64_t base_disk_offset;
3055 int64_t last_offset;
3056 hammer_off_t last_disk_offset;
3057 hammer_off_t disk_offset;
3058 int rec_len;
3059 int error;
4a2796f3 3060 int blksize;
a99b9ea2 3061
ce0138a6 3062 ++hammer_stats_file_iopsr;
a99b9ea2 3063 ip = ap->a_vp->v_data;
b0aab9b9 3064 hmp = ip->hmp;
a99b9ea2
MD
3065
3066 /*
3067 * We can only BMAP regular files. We can't BMAP database files,
3068 * directories, etc.
3069 */
3070 if (ip->ino_data.obj_type != HAMMER_OBJTYPE_REGFILE)
3071 return(EOPNOTSUPP);
3072
3073 /*
3074 * bmap is typically called with runp/runb both NULL when used
3075 * for writing. We do not support BMAP for writing atm.
3076 */
4a2796f3 3077 if (ap->a_cmd != BUF_CMD_READ)
a99b9ea2
MD
3078 return(EOPNOTSUPP);
3079
3080 /*
3081 * Scan the B-Tree to acquire blockmap addresses, then translate
3082 * to raw addresses.
3083 */
b0aab9b9
MD
3084 lwkt_gettoken(&hmp->fs_token);
3085 hammer_simple_transaction(&trans, hmp);
cb51be26 3086#if 0
973c11b9
MD
3087 kprintf("bmap_beg %016llx ip->cache %p\n",
3088 (long long)ap->a_loffset, ip->cache[1]);
cb51be26 3089#endif
a99b9ea2
MD
3090 hammer_init_cursor(&trans, &cursor, &ip->cache[1], ip);
3091
3092 /*
3093 * Key range (begin and end inclusive) to scan. Note that the key's
3094 * stored in the actual records represent BASE+LEN, not BASE. The
3095 * first record containing bio_offset will have a key > bio_offset.
3096 */
5a930e66
MD
3097 cursor.key_beg.localization = ip->obj_localization +
3098 HAMMER_LOCALIZE_MISC;
a99b9ea2
MD
3099 cursor.key_beg.obj_id = ip->obj_id;
3100 cursor.key_beg.create_tid = 0;
3101 cursor.key_beg.delete_tid = 0;
3102 cursor.key_beg.obj_type = 0;
3103 if (ap->a_runb)
3104 cursor.key_beg.key = ap->a_loffset - MAXPHYS + 1;
3105 else
3106 cursor.key_beg.key = ap->a_loffset + 1;
3107 if (cursor.key_beg.key < 0)
3108 cursor.key_beg.key = 0;
3109 cursor.asof = ip->obj_asof;
bf3b416b 3110 cursor.flags |= HAMMER_CURSOR_ASOF;
a99b9ea2
MD
3111
3112 cursor.key_end = cursor.key_beg;
3113 KKASSERT(ip->ino_data.obj_type == HAMMER_OBJTYPE_REGFILE);
3114
3115 ran_end = ap->a_loffset + MAXPHYS;
3116 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
3117 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
3118 tmp64 = ran_end + MAXPHYS + 1; /* work-around GCC-4 bug */
3119 if (tmp64 < ran_end)
3120 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
3121 else
3122 cursor.key_end.key = ran_end + MAXPHYS + 1;
3123
3124 cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
3125
3126 error = hammer_ip_first(&cursor);
3127 base_offset = last_offset = 0;
3128 base_disk_offset = last_disk_offset = 0;
3129
3130 while (error == 0) {
3131 /*
3132 * Get the base file offset of the record. The key for
3133 * data records is (base + bytes) rather then (base).
4a2796f3
MD
3134 *
3135 * NOTE: rec_offset + rec_len may exceed the end-of-file.
3136 * The extra bytes should be zero on-disk and the BMAP op
3137 * should still be ok.
a99b9ea2
MD
3138 */
3139 base = &cursor.leaf->base;
3140 rec_offset = base->key - cursor.leaf->data_len;
3141 rec_len = cursor.leaf->data_len;
3142
3143 /*
4a2796f3
MD
3144 * Incorporate any cached truncation.
3145 *
3146 * NOTE: Modifications to rec_len based on synthesized
3147 * truncation points remove the guarantee that any extended
3148 * data on disk is zero (since the truncations may not have
3149 * taken place on-media yet).
a99b9ea2
MD
3150 */
3151 if (ip->flags & HAMMER_INODE_TRUNCATED) {
3152 if (hammer_cursor_ondisk(&cursor) ||
3153 cursor.iprec->flush_state == HAMMER_FST_FLUSH) {
3154 if (ip->trunc_off <= rec_offset)
3155 rec_len = 0;
3156 else if (ip->trunc_off < rec_offset + rec_len)
3157 rec_len = (int)(ip->trunc_off - rec_offset);
3158 }
3159 }
3160 if (ip->sync_flags & HAMMER_INODE_TRUNCATED) {
3161 if (hammer_cursor_ondisk(&cursor)) {
3162 if (ip->sync_trunc_off <= rec_offset)
3163 rec_len = 0;
3164 else if (ip->sync_trunc_off < rec_offset + rec_len)
3165 rec_len = (int)(ip->sync_trunc_off - rec_offset);
3166 }
3167 }
3168
3169 /*
3170 * Accumulate information. If we have hit a discontiguous
3171 * block reset base_offset unless we are already beyond the
3172 * requested offset. If we are, that's it, we stop.
3173 */
a99b9ea2
MD
3174 if (error)
3175 break;
1b0ab2c3
MD
3176 if (hammer_cursor_ondisk(&cursor)) {
3177 disk_offset = cursor.leaf->data_offset;
3178 if (rec_offset != last_offset ||
3179 disk_offset != last_disk_offset) {
3180 if (rec_offset > ap->a_loffset)
3181 break;