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[dragonfly.git] / sys / vfs / hammer / hammer_vnops.c
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1/*
2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
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 *
8cd0a023 34 * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.3 2007/11/19 00:53:40 dillon Exp $
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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>
46#include "hammer.h"
47
48/*
49 * USERFS VNOPS
50 */
51/*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
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52static int hammer_vop_fsync(struct vop_fsync_args *);
53static int hammer_vop_read(struct vop_read_args *);
54static int hammer_vop_write(struct vop_write_args *);
55static int hammer_vop_access(struct vop_access_args *);
56static int hammer_vop_advlock(struct vop_advlock_args *);
57static int hammer_vop_close(struct vop_close_args *);
58static int hammer_vop_ncreate(struct vop_ncreate_args *);
59static int hammer_vop_getattr(struct vop_getattr_args *);
60static int hammer_vop_nresolve(struct vop_nresolve_args *);
61static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
62static int hammer_vop_nlink(struct vop_nlink_args *);
63static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
64static int hammer_vop_nmknod(struct vop_nmknod_args *);
65static int hammer_vop_open(struct vop_open_args *);
66static int hammer_vop_pathconf(struct vop_pathconf_args *);
67static int hammer_vop_print(struct vop_print_args *);
68static int hammer_vop_readdir(struct vop_readdir_args *);
69static int hammer_vop_readlink(struct vop_readlink_args *);
70static int hammer_vop_nremove(struct vop_nremove_args *);
71static int hammer_vop_nrename(struct vop_nrename_args *);
72static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
73static int hammer_vop_setattr(struct vop_setattr_args *);
74static int hammer_vop_strategy(struct vop_strategy_args *);
75static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
76static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
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77
78struct vop_ops hammer_vnode_vops = {
79 .vop_default = vop_defaultop,
80 .vop_fsync = hammer_vop_fsync,
81 .vop_read = hammer_vop_read,
82 .vop_write = hammer_vop_write,
83 .vop_access = hammer_vop_access,
84 .vop_advlock = hammer_vop_advlock,
85 .vop_close = hammer_vop_close,
86 .vop_ncreate = hammer_vop_ncreate,
87 .vop_getattr = hammer_vop_getattr,
88 .vop_inactive = hammer_vop_inactive,
89 .vop_reclaim = hammer_vop_reclaim,
90 .vop_nresolve = hammer_vop_nresolve,
91 .vop_nlookupdotdot = hammer_vop_nlookupdotdot,
92 .vop_nlink = hammer_vop_nlink,
93 .vop_nmkdir = hammer_vop_nmkdir,
94 .vop_nmknod = hammer_vop_nmknod,
95 .vop_open = hammer_vop_open,
96 .vop_pathconf = hammer_vop_pathconf,
97 .vop_print = hammer_vop_print,
98 .vop_readdir = hammer_vop_readdir,
99 .vop_readlink = hammer_vop_readlink,
100 .vop_nremove = hammer_vop_nremove,
101 .vop_nrename = hammer_vop_nrename,
102 .vop_nrmdir = hammer_vop_nrmdir,
103 .vop_setattr = hammer_vop_setattr,
104 .vop_strategy = hammer_vop_strategy,
105 .vop_nsymlink = hammer_vop_nsymlink,
106 .vop_nwhiteout = hammer_vop_nwhiteout
107};
108
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109static int hammer_dounlink(struct nchandle *nch, struct vnode *dvp,
110 struct ucred *cred, int flags);
111static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
112static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
113
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114#if 0
115static
116int
117hammer_vop_vnoperate(struct vop_generic_args *)
118{
119 return (VOCALL(&hammer_vnode_vops, ap));
120}
121#endif
122
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123/*
124 * hammer_vop_fsync { vp, waitfor }
125 */
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126static
127int
66325755 128hammer_vop_fsync(struct vop_fsync_args *ap)
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129{
130 return EOPNOTSUPP;
131}
132
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133/*
134 * hammer_vop_read { vp, uio, ioflag, cred }
135 */
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136static
137int
66325755 138hammer_vop_read(struct vop_read_args *ap)
427e5fc6 139{
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140 struct hammer_transaction trans;
141 struct hammer_inode *ip;
142 off_t offset;
143 struct buf *bp;
144 struct uio *uio;
145 int error;
146 int n;
8cd0a023 147 int seqcount;
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148
149 if (ap->a_vp->v_type != VREG)
150 return (EINVAL);
151 ip = VTOI(ap->a_vp);
152 error = 0;
8cd0a023 153 seqcount = ap->a_ioflag >> 16;
66325755 154
8cd0a023 155 hammer_start_transaction(&trans, ip->hmp);
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156
157 /*
158 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
159 */
160 uio = ap->a_uio;
161 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_rec.ino_size) {
162 offset = uio->uio_offset & HAMMER_BUFMASK;
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163 error = cluster_read(ap->a_vp, ip->ino_rec.ino_size,
164 uio->uio_offset - offset, HAMMER_BUFSIZE,
165 MAXBSIZE, seqcount, &bp);
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166 if (error) {
167 brelse(bp);
168 break;
169 }
8cd0a023 170 bp->b_flags |= B_CLUSTEROK;
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171 n = HAMMER_BUFSIZE - offset;
172 if (n > uio->uio_resid)
173 n = uio->uio_resid;
174 if (n > ip->ino_rec.ino_size - uio->uio_offset)
175 n = (int)(ip->ino_rec.ino_size - uio->uio_offset);
176 error = uiomove((char *)bp->b_data + offset, n, uio);
177 if (error) {
8cd0a023 178 bqrelse(bp);
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179 break;
180 }
181 ip->ino_rec.ino_atime = trans.tid;
182 hammer_modify_inode(&trans, ip, HAMMER_INODE_ITIMES);
183 bqrelse(bp);
184 }
185 hammer_commit_transaction(&trans);
186 return (error);
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187}
188
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189/*
190 * hammer_vop_write { vp, uio, ioflag, cred }
191 */
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192static
193int
66325755 194hammer_vop_write(struct vop_write_args *ap)
427e5fc6 195{
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196 struct hammer_transaction trans;
197 struct hammer_inode *ip;
198 struct uio *uio;
199 off_t offset;
200 struct buf *bp;
201 int error;
202 int n;
203
204 if (ap->a_vp->v_type != VREG)
205 return (EINVAL);
206 ip = VTOI(ap->a_vp);
207 error = 0;
208
209 /*
210 * Create a transaction to cover the operations we perform.
211 */
8cd0a023 212 hammer_start_transaction(&trans, ip->hmp);
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213 uio = ap->a_uio;
214
215 /*
216 * Check append mode
217 */
218 if (ap->a_ioflag & IO_APPEND)
219 uio->uio_offset = ip->ino_rec.ino_size;
220
221 /*
222 * Check for illegal write offsets. Valid range is 0...2^63-1
223 */
224 if (uio->uio_offset < 0 || uio->uio_offset + uio->uio_resid <= 0)
225 return (EFBIG);
226
227 /*
228 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
229 */
230 while (uio->uio_resid > 0) {
231 offset = uio->uio_offset & HAMMER_BUFMASK;
232 if (offset == 0 && uio->uio_resid >= HAMMER_BUFSIZE) {
233 bp = getblk(ap->a_vp, uio->uio_offset, HAMMER_BUFSIZE,
234 0, 0);
235 } else if (offset == 0 && uio->uio_offset >= ip->ino_rec.ino_size) {
236 bp = getblk(ap->a_vp, uio->uio_offset, HAMMER_BUFSIZE,
237 0, 0);
238 vfs_bio_clrbuf(bp);
239 } else {
240 error = bread(ap->a_vp, uio->uio_offset - offset,
241 HAMMER_BUFSIZE, &bp);
242 if (error) {
243 brelse(bp);
244 break;
245 }
246 }
247 n = HAMMER_BUFSIZE - offset;
248 if (n > uio->uio_resid)
249 n = uio->uio_resid;
250 error = uiomove((char *)bp->b_data + offset, n, uio);
251 if (error) {
252 brelse(bp);
253 break;
254 }
8cd0a023 255 bp->b_flags |= B_CLUSTEROK;
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256 if (ip->ino_rec.ino_size < uio->uio_offset) {
257 ip->ino_rec.ino_size = uio->uio_offset;
258 ip->ino_rec.ino_mtime = trans.tid;
259 hammer_modify_inode(&trans, ip,
260 HAMMER_INODE_RDIRTY | HAMMER_INODE_ITIMES);
261 }
262 if (ap->a_ioflag & IO_SYNC) {
263 bwrite(bp);
264 } else if (ap->a_ioflag & IO_DIRECT) {
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265 bawrite(bp);
266 } else {
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267 bdwrite(bp);
268 }
269 }
270 if (error)
271 hammer_abort_transaction(&trans);
272 else
273 hammer_commit_transaction(&trans);
274 return (error);
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275}
276
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277/*
278 * hammer_vop_access { vp, mode, cred }
279 */
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280static
281int
66325755 282hammer_vop_access(struct vop_access_args *ap)
427e5fc6 283{
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284 struct hammer_inode *ip = VTOI(ap->a_vp);
285 uid_t uid;
286 gid_t gid;
287 int error;
288
289 uid = hammer_to_unix_xid(&ip->ino_data.uid);
290 gid = hammer_to_unix_xid(&ip->ino_data.gid);
291
292 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
293 ip->ino_data.uflags);
294 return (error);
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295}
296
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297/*
298 * hammer_vop_advlock { vp, id, op, fl, flags }
299 */
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300static
301int
66325755 302hammer_vop_advlock(struct vop_advlock_args *ap)
427e5fc6 303{
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304 struct hammer_inode *ip = VTOI(ap->a_vp);
305
306 return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
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307}
308
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309/*
310 * hammer_vop_close { vp, fflag }
311 */
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312static
313int
66325755 314hammer_vop_close(struct vop_close_args *ap)
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315{
316 return EOPNOTSUPP;
317}
318
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319/*
320 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
321 *
322 * The operating system has already ensured that the directory entry
323 * does not exist and done all appropriate namespace locking.
324 */
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325static
326int
66325755 327hammer_vop_ncreate(struct vop_ncreate_args *ap)
427e5fc6 328{
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329 struct hammer_transaction trans;
330 struct hammer_inode *dip;
331 struct hammer_inode *nip;
332 struct nchandle *nch;
333 int error;
334
335 nch = ap->a_nch;
336 dip = VTOI(ap->a_dvp);
337
338 /*
339 * Create a transaction to cover the operations we perform.
340 */
8cd0a023 341 hammer_start_transaction(&trans, dip->hmp);
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342
343 /*
344 * Create a new filesystem object of the requested type. The
8cd0a023 345 * returned inode will be referenceds but not locked.
66325755 346 */
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347
348 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
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349 if (error) {
350 hammer_abort_transaction(&trans);
351 *ap->a_vpp = NULL;
352 return (error);
353 }
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354
355 /*
356 * Add the new filesystem object to the directory. This will also
357 * bump the inode's link count.
358 */
359 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
360
361 /*
362 * Finish up.
363 */
364 if (error) {
8cd0a023 365 hammer_rel_inode(nip);
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366 hammer_abort_transaction(&trans);
367 *ap->a_vpp = NULL;
368 } else {
369 hammer_commit_transaction(&trans);
370 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
8cd0a023 371 hammer_rel_inode(nip);
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372 }
373 return (error);
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374}
375
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376/*
377 * hammer_vop_getattr { vp, vap }
378 */
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379static
380int
66325755 381hammer_vop_getattr(struct vop_getattr_args *ap)
427e5fc6 382{
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383 struct hammer_inode *ip = VTOI(ap->a_vp);
384 struct vattr *vap = ap->a_vap;
385
386#if 0
387 if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
388 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
389 ip->obj_asof == 0
390 ) {
391 /* LAZYMOD XXX */
392 }
393 hammer_itimes(ap->a_vp);
394#endif
395
396 vap->va_fsid = ip->hmp->fsid_udev;
397 vap->va_fileid = ip->ino_rec.base.base.obj_id;
398 vap->va_mode = ip->ino_data.mode;
399 vap->va_nlink = ip->ino_rec.ino_nlinks;
400 vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
401 vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
402 vap->va_rmajor = 0;
403 vap->va_rminor = 0;
404 vap->va_size = ip->ino_rec.ino_size;
405 hammer_to_timespec(ip->ino_rec.ino_atime, &vap->va_atime);
406 hammer_to_timespec(ip->ino_rec.ino_mtime, &vap->va_mtime);
407 hammer_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
408 vap->va_flags = ip->ino_data.uflags;
409 vap->va_gen = 1; /* hammer inums are unique for all time */
410 vap->va_blocksize = 32768; /* XXX - extract from root volume */
411 vap->va_bytes = ip->ino_rec.ino_size;
412 vap->va_type = hammer_get_vnode_type(ip->ino_rec.base.base.obj_type);
413 vap->va_filerev = 0; /* XXX */
414 /* mtime uniquely identifies any adjustments made to the file */
415 vap->va_fsmid = ip->ino_rec.ino_mtime;
416 vap->va_uid_uuid = ip->ino_data.uid;
417 vap->va_gid_uuid = ip->ino_data.gid;
418 vap->va_fsid_uuid = ip->hmp->fsid;
419 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
420 VA_FSID_UUID_VALID;
421 return(0);
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422}
423
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424/*
425 * hammer_vop_nresolve { nch, dvp, cred }
426 *
427 * Locate the requested directory entry.
428 */
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429static
430int
66325755 431hammer_vop_nresolve(struct vop_nresolve_args *ap)
427e5fc6 432{
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433 struct namecache *ncp;
434 struct hammer_inode *dip;
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435 struct hammer_cursor cursor;
436 union hammer_record_ondisk *rec;
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437 struct vnode *vp;
438 int64_t namekey;
439 int error;
66325755 440
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441 /*
442 * Calculate the namekey and setup the key range for the scan. This
443 * works kinda like a chained hash table where the lower 32 bits
444 * of the namekey synthesize the chain.
445 *
446 * The key range is inclusive of both key_beg and key_end.
447 */
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448 dip = VTOI(ap->a_dvp);
449 ncp = ap->a_nch->ncp;
450 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
451
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452 hammer_init_cursor_ip(&cursor, dip);
453 cursor.key_beg.obj_id = dip->obj_id;
454 cursor.key_beg.key = namekey;
455 cursor.key_beg.create_tid = dip->obj_asof;
456 cursor.key_beg.delete_tid = 0;
457 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
458 cursor.key_beg.obj_type = 0;
66325755 459
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460 cursor.key_end = cursor.key_beg;
461 cursor.key_end.key |= 0xFFFFFFFFULL;
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462
463 /*
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464 * Scan all matching records (the chain), locate the one matching
465 * the requested path component. info->last_error contains the
466 * error code on search termination and could be 0, ENOENT, or
467 * something else.
468 *
469 * The hammer_ip_*() functions merge in-memory records with on-disk
470 * records for the purposes of the search.
66325755 471 */
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472 rec = hammer_ip_first(&cursor, dip);
473 while (rec) {
474 if (hammer_ip_resolve_data(&cursor) != 0) /* sets last_error */
66325755 475 break;
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476 if (ncp->nc_nlen == rec->entry.base.data_len &&
477 bcmp(ncp->nc_name, (void *)cursor.data, ncp->nc_nlen) == 0) {
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478 break;
479 }
8cd0a023 480 rec = hammer_ip_next(&cursor);
66325755 481 }
8cd0a023 482 error = cursor.last_error;
66325755 483 if (error == 0) {
8cd0a023 484 error = hammer_vfs_vget(dip->hmp->mp, rec->entry.obj_id, &vp);
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485 if (error == 0) {
486 vn_unlock(vp);
487 cache_setvp(ap->a_nch, vp);
488 vrele(vp);
489 }
490 } else if (error == ENOENT) {
491 cache_setvp(ap->a_nch, NULL);
492 }
8cd0a023 493 hammer_done_cursor(&cursor);
66325755 494 return (error);
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495}
496
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497/*
498 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
499 *
500 * Locate the parent directory of a directory vnode.
501 *
502 * dvp is referenced but not locked. *vpp must be returned referenced and
503 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
504 * at the root, instead it could indicate that the directory we were in was
505 * removed.
506 */
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507static
508int
66325755 509hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
427e5fc6 510{
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511 struct hammer_inode *dip;
512 u_int64_t parent_obj_id;
513
514 dip = VTOI(ap->a_dvp);
515 if ((parent_obj_id = dip->ino_data.parent_obj_id) == 0) {
516 *ap->a_vpp = NULL;
517 return ENOENT;
518 }
519 return(hammer_vfs_vget(dip->hmp->mp, parent_obj_id, ap->a_vpp));
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520}
521
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522/*
523 * hammer_vop_nlink { nch, dvp, vp, cred }
524 */
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525static
526int
66325755 527hammer_vop_nlink(struct vop_nlink_args *ap)
427e5fc6 528{
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529 struct hammer_transaction trans;
530 struct hammer_inode *dip;
531 struct hammer_inode *ip;
532 struct nchandle *nch;
533 int error;
534
535 nch = ap->a_nch;
536 dip = VTOI(ap->a_dvp);
537 ip = VTOI(ap->a_vp);
538
539 /*
540 * Create a transaction to cover the operations we perform.
541 */
8cd0a023 542 hammer_start_transaction(&trans, dip->hmp);
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543
544 /*
545 * Add the filesystem object to the directory. Note that neither
546 * dip nor ip are referenced or locked, but their vnodes are
547 * referenced. This function will bump the inode's link count.
548 */
549 error = hammer_add_directory(&trans, dip, nch->ncp, ip);
550
551 /*
552 * Finish up.
553 */
554 if (error) {
555 hammer_abort_transaction(&trans);
556 } else {
557 hammer_commit_transaction(&trans);
558 }
559 return (error);
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560}
561
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562/*
563 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
564 *
565 * The operating system has already ensured that the directory entry
566 * does not exist and done all appropriate namespace locking.
567 */
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568static
569int
66325755 570hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
427e5fc6 571{
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572 struct hammer_transaction trans;
573 struct hammer_inode *dip;
574 struct hammer_inode *nip;
575 struct nchandle *nch;
576 int error;
577
578 nch = ap->a_nch;
579 dip = VTOI(ap->a_dvp);
580
581 /*
582 * Create a transaction to cover the operations we perform.
583 */
8cd0a023 584 hammer_start_transaction(&trans, dip->hmp);
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585
586 /*
587 * Create a new filesystem object of the requested type. The
8cd0a023 588 * returned inode will be referenced but not locked.
66325755 589 */
8cd0a023 590 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
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591 if (error) {
592 hammer_abort_transaction(&trans);
593 *ap->a_vpp = NULL;
594 return (error);
595 }
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596
597 /*
598 * Add the new filesystem object to the directory. This will also
599 * bump the inode's link count.
600 */
601 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
602
603 /*
604 * Finish up.
605 */
606 if (error) {
8cd0a023 607 hammer_rel_inode(nip);
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608 hammer_abort_transaction(&trans);
609 *ap->a_vpp = NULL;
610 } else {
611 hammer_commit_transaction(&trans);
612 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
8cd0a023 613 hammer_rel_inode(nip);
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614 }
615 return (error);
427e5fc6
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616}
617
66325755
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618/*
619 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
620 *
621 * The operating system has already ensured that the directory entry
622 * does not exist and done all appropriate namespace locking.
623 */
427e5fc6
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624static
625int
66325755 626hammer_vop_nmknod(struct vop_nmknod_args *ap)
427e5fc6 627{
66325755
MD
628 struct hammer_transaction trans;
629 struct hammer_inode *dip;
630 struct hammer_inode *nip;
631 struct nchandle *nch;
632 int error;
633
634 nch = ap->a_nch;
635 dip = VTOI(ap->a_dvp);
636
637 /*
638 * Create a transaction to cover the operations we perform.
639 */
8cd0a023 640 hammer_start_transaction(&trans, dip->hmp);
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641
642 /*
643 * Create a new filesystem object of the requested type. The
8cd0a023 644 * returned inode will be referenced but not locked.
66325755 645 */
8cd0a023 646 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
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MD
647 if (error) {
648 hammer_abort_transaction(&trans);
649 *ap->a_vpp = NULL;
650 return (error);
651 }
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652
653 /*
654 * Add the new filesystem object to the directory. This will also
655 * bump the inode's link count.
656 */
657 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
658
659 /*
660 * Finish up.
661 */
662 if (error) {
8cd0a023 663 hammer_rel_inode(nip);
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664 hammer_abort_transaction(&trans);
665 *ap->a_vpp = NULL;
666 } else {
667 hammer_commit_transaction(&trans);
668 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
8cd0a023 669 hammer_rel_inode(nip);
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670 }
671 return (error);
427e5fc6
MD
672}
673
66325755
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674/*
675 * hammer_vop_open { vp, mode, cred, fp }
676 */
427e5fc6
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677static
678int
66325755 679hammer_vop_open(struct vop_open_args *ap)
427e5fc6
MD
680{
681 return EOPNOTSUPP;
682}
683
66325755
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684/*
685 * hammer_vop_pathconf { vp, name, retval }
686 */
427e5fc6
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687static
688int
66325755 689hammer_vop_pathconf(struct vop_pathconf_args *ap)
427e5fc6
MD
690{
691 return EOPNOTSUPP;
692}
693
66325755
MD
694/*
695 * hammer_vop_print { vp }
696 */
427e5fc6
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697static
698int
66325755 699hammer_vop_print(struct vop_print_args *ap)
427e5fc6
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700{
701 return EOPNOTSUPP;
702}
703
66325755
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704/*
705 * hammer_vop_readdir { vp, uio, cred, *eofflag }
706 */
427e5fc6
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707static
708int
66325755 709hammer_vop_readdir(struct vop_readdir_args *ap)
427e5fc6
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710{
711 return EOPNOTSUPP;
712}
713
66325755
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714/*
715 * hammer_vop_readlink { vp, uio, cred }
716 */
427e5fc6
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717static
718int
66325755 719hammer_vop_readlink(struct vop_readlink_args *ap)
427e5fc6
MD
720{
721 return EOPNOTSUPP;
722}
723
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724/*
725 * hammer_vop_nremove { nch, dvp, cred }
726 */
427e5fc6
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727static
728int
66325755 729hammer_vop_nremove(struct vop_nremove_args *ap)
427e5fc6 730{
8cd0a023 731 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
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732}
733
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734/*
735 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
736 */
427e5fc6
MD
737static
738int
66325755 739hammer_vop_nrename(struct vop_nrename_args *ap)
427e5fc6 740{
8cd0a023
MD
741 struct hammer_transaction trans;
742 struct namecache *fncp;
743 struct namecache *tncp;
744 struct hammer_inode *fdip;
745 struct hammer_inode *tdip;
746 struct hammer_inode *ip;
747 struct hammer_cursor cursor;
748 union hammer_record_ondisk *rec;
749 int64_t namekey;
750 int error;
751
752 fdip = VTOI(ap->a_fdvp);
753 tdip = VTOI(ap->a_tdvp);
754 fncp = ap->a_fnch->ncp;
755 tncp = ap->a_tnch->ncp;
756 hammer_start_transaction(&trans, fdip->hmp);
757
758 /*
759 * Extract the hammer_inode from fncp and add link to the target
760 * directory.
761 */
762 ip = VTOI(fncp->nc_vp);
763 KKASSERT(ip != NULL);
764
765 error = hammer_add_directory(&trans, tdip, tncp, ip);
766
767 /*
768 * Locate the record in the originating directory and remove it.
769 *
770 * Calculate the namekey and setup the key range for the scan. This
771 * works kinda like a chained hash table where the lower 32 bits
772 * of the namekey synthesize the chain.
773 *
774 * The key range is inclusive of both key_beg and key_end.
775 */
776 namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
777
778 hammer_init_cursor_ip(&cursor, fdip);
779 cursor.key_beg.obj_id = fdip->obj_id;
780 cursor.key_beg.key = namekey;
781 cursor.key_beg.create_tid = fdip->obj_asof;
782 cursor.key_beg.delete_tid = 0;
783 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
784 cursor.key_beg.obj_type = 0;
785
786 cursor.key_end = cursor.key_beg;
787 cursor.key_end.key |= 0xFFFFFFFFULL;
788
789 /*
790 * Scan all matching records (the chain), locate the one matching
791 * the requested path component. info->last_error contains the
792 * error code on search termination and could be 0, ENOENT, or
793 * something else.
794 *
795 * The hammer_ip_*() functions merge in-memory records with on-disk
796 * records for the purposes of the search.
797 */
798 rec = hammer_ip_first(&cursor, fdip);
799 while (rec) {
800 if (hammer_ip_resolve_data(&cursor) != 0)
801 break;
802 if (fncp->nc_nlen == rec->entry.base.data_len &&
803 bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
804 break;
805 }
806 rec = hammer_ip_next(&cursor);
807 }
808 error = cursor.last_error;
809
810 /*
811 * If all is ok we have to get the inode so we can adjust nlinks.
812 */
813 if (error)
814 goto done;
815 error = hammer_del_directory(&trans, &cursor, fdip, ip);
816 if (error == 0) {
817 cache_rename(ap->a_fnch, ap->a_tnch);
818 cache_setvp(ap->a_tnch, ip->vp);
819 }
820done:
821 if (error == 0) {
822 hammer_commit_transaction(&trans);
823 } else {
824 hammer_abort_transaction(&trans);
825 }
826 hammer_done_cursor(&cursor);
827 return (error);
427e5fc6
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828}
829
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830/*
831 * hammer_vop_nrmdir { nch, dvp, cred }
832 */
427e5fc6
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833static
834int
66325755 835hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
427e5fc6 836{
8cd0a023
MD
837 /* XXX check that directory is empty */
838
839 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
427e5fc6
MD
840}
841
66325755
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842/*
843 * hammer_vop_setattr { vp, vap, cred }
844 */
427e5fc6
MD
845static
846int
66325755 847hammer_vop_setattr(struct vop_setattr_args *ap)
427e5fc6 848{
8cd0a023
MD
849 struct hammer_transaction trans;
850 struct vattr *vap;
851 struct hammer_inode *ip;
852 int modflags;
853 int error;
854 u_int32_t flags;
855 uuid_t uuid;
856
857 vap = ap->a_vap;
858 ip = ap->a_vp->v_data;
859 modflags = 0;
860
861 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
862 return(EROFS);
863
864 hammer_start_transaction(&trans, ip->hmp);
865 error = 0;
866
867 if (vap->va_flags != VNOVAL) {
868 flags = ip->ino_data.uflags;
869 error = vop_helper_setattr_flags(&flags, vap->va_flags,
870 hammer_to_unix_xid(&ip->ino_data.uid),
871 ap->a_cred);
872 if (error == 0) {
873 if (ip->ino_data.uflags != flags) {
874 ip->ino_data.uflags = flags;
875 modflags |= HAMMER_INODE_DDIRTY;
876 }
877 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
878 error = 0;
879 goto done;
880 }
881 }
882 goto done;
883 }
884 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
885 error = EPERM;
886 goto done;
887 }
888 if (vap->va_uid != (uid_t)VNOVAL) {
889 hammer_guid_to_uuid(&uuid, vap->va_uid);
890 if (bcmp(&uuid, &ip->ino_data.uid, sizeof(uuid)) == 0) {
891 ip->ino_data.uid = uuid;
892 modflags |= HAMMER_INODE_DDIRTY;
893 }
894 }
895 if (vap->va_gid != (uid_t)VNOVAL) {
896 hammer_guid_to_uuid(&uuid, vap->va_uid);
897 if (bcmp(&uuid, &ip->ino_data.gid, sizeof(uuid)) == 0) {
898 ip->ino_data.gid = uuid;
899 modflags |= HAMMER_INODE_DDIRTY;
900 }
901 }
902 if (vap->va_size != VNOVAL) {
903 switch(ap->a_vp->v_type) {
904 case VREG:
905 case VDATABASE:
906 error = hammer_delete_range(&trans, ip,
907 vap->va_size,
908 0x7FFFFFFFFFFFFFFFLL);
909 break;
910 default:
911 error = EINVAL;
912 goto done;
913 }
914 }
915 if (vap->va_atime.tv_sec != VNOVAL) {
916 ip->ino_rec.ino_atime =
917 hammer_timespec_to_transid(&vap->va_atime);
918 modflags |= HAMMER_INODE_ITIMES;
919 }
920 if (vap->va_mtime.tv_sec != VNOVAL) {
921 ip->ino_rec.ino_mtime =
922 hammer_timespec_to_transid(&vap->va_mtime);
923 modflags |= HAMMER_INODE_ITIMES;
924 }
925 if (vap->va_mode != (mode_t)VNOVAL) {
926 if (ip->ino_data.mode != vap->va_mode) {
927 ip->ino_data.mode = vap->va_mode;
928 modflags |= HAMMER_INODE_DDIRTY;
929 }
930 }
931done:
932 if (error) {
933 hammer_abort_transaction(&trans);
934 } else {
935 if (modflags)
936 hammer_modify_inode(&trans, ip, modflags);
937 hammer_commit_transaction(&trans);
938 }
939 return (error);
427e5fc6
MD
940}
941
66325755
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942/*
943 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
944 */
427e5fc6
MD
945static
946int
66325755 947hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
427e5fc6
MD
948{
949 return EOPNOTSUPP;
950}
951
66325755
MD
952/*
953 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
954 */
427e5fc6
MD
955static
956int
66325755 957hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
427e5fc6 958{
8cd0a023 959 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, ap->a_flags));
427e5fc6
MD
960}
961
66325755
MD
962/*
963 * hammer_vop_strategy { vp, bio }
8cd0a023
MD
964 *
965 * Strategy call, used for regular file read & write only. Note that the
966 * bp may represent a cluster.
967 *
968 * To simplify operation and allow better optimizations in the future,
969 * this code does not make any assumptions with regards to buffer alignment
970 * or size.
66325755 971 */
427e5fc6
MD
972static
973int
66325755 974hammer_vop_strategy(struct vop_strategy_args *ap)
427e5fc6 975{
8cd0a023
MD
976 struct buf *bp;
977 int error;
978
979 bp = ap->a_bio->bio_buf;
980
981 switch(bp->b_cmd) {
982 case BUF_CMD_READ:
983 error = hammer_vop_strategy_read(ap);
984 break;
985 case BUF_CMD_WRITE:
986 error = hammer_vop_strategy_write(ap);
987 break;
988 default:
989 error = EINVAL;
990 break;
991 }
992 bp->b_error = error;
993 if (error)
994 bp->b_flags |= B_ERROR;
995 biodone(ap->a_bio);
996 return (error);
427e5fc6
MD
997}
998
8cd0a023
MD
999/*
1000 * Read from a regular file. Iterate the related records and fill in the
1001 * BIO/BUF. Gaps are zero-filled.
1002 *
1003 * The support code in hammer_object.c should be used to deal with mixed
1004 * in-memory and on-disk records.
1005 *
1006 * XXX atime update
1007 */
1008static
1009int
1010hammer_vop_strategy_read(struct vop_strategy_args *ap)
1011{
1012 struct hammer_inode *ip = ap->a_vp->v_data;
1013 struct hammer_cursor cursor;
1014 hammer_record_ondisk_t rec;
1015 hammer_base_elm_t base;
1016 struct bio *bio;
1017 struct buf *bp;
1018 int64_t rec_offset;
1019 int error;
1020 int boff;
1021 int roff;
1022 int n;
1023
1024 bio = ap->a_bio;
1025 bp = bio->bio_buf;
1026
1027 hammer_init_cursor_ip(&cursor, ip);
1028
1029 /*
1030 * Key range (begin and end inclusive) to scan. Note that the key's
1031 * stored in the actual records represent the
1032 */
1033 cursor.key_beg.obj_id = ip->obj_id;
1034 cursor.key_beg.create_tid = ip->obj_asof;
1035 cursor.key_beg.delete_tid = 0;
1036 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
1037 cursor.key_beg.obj_type = 0;
1038 cursor.key_beg.key = bio->bio_offset;
1039
1040 cursor.key_end = cursor.key_beg;
1041 cursor.key_end.key = bio->bio_offset + bp->b_bufsize - 1;
1042
1043 rec = hammer_ip_first(&cursor, ip);
1044 boff = 0;
1045
1046 while (rec) {
1047 if (hammer_ip_resolve_data(&cursor) != 0)
66325755 1048 break;
8cd0a023
MD
1049 base = &rec->base.base;
1050
1051 rec_offset = base->key - rec->data.base.data_len;
1052
66325755 1053 /*
8cd0a023 1054 * Zero-fill any gap
66325755 1055 */
8cd0a023
MD
1056 n = (int)(rec_offset - (bio->bio_offset + boff));
1057 if (n > 0) {
1058 kprintf("zfill %d bytes\n", n);
1059 bzero((char *)bp->b_data + boff, n);
1060 boff += n;
1061 n = 0;
66325755 1062 }
8cd0a023
MD
1063
1064 /*
1065 * Calculate the data offset in the record and the number
1066 * of bytes we can copy.
1067 */
1068 roff = -n;
1069 n = rec->data.base.data_len - roff;
1070 KKASSERT(n > 0);
1071 if (n > bp->b_bufsize - boff)
1072 n = bp->b_bufsize - boff;
1073 bcopy((char *)cursor.data + roff, (char *)bp->b_data + boff, n);
1074 boff += n;
1075 if (boff == bp->b_bufsize)
66325755 1076 break;
8cd0a023 1077 rec = hammer_ip_next(&cursor);
66325755 1078 }
8cd0a023 1079 hammer_done_cursor(&cursor);
66325755
MD
1080
1081 /*
8cd0a023 1082 * There may have been a gap after the last record
66325755 1083 */
8cd0a023
MD
1084 error = cursor.last_error;
1085 if (error == ENOENT)
1086 error = 0;
1087 if (error == 0 && boff != bp->b_bufsize) {
1088 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1089 /* boff = bp->b_bufsize; */
1090 }
1091 bp->b_resid = 0;
1092 return(error);
1093}
1094
1095/*
1096 * Write to a regular file. Iterate the related records and mark for
1097 * deletion. If existing edge records (left and right side) overlap our
1098 * write they have to be marked deleted and new records created, usually
1099 * referencing a portion of the original data. Then add a record to
1100 * represent the buffer.
1101 *
1102 * The support code in hammer_object.c should be used to deal with mixed
1103 * in-memory and on-disk records.
1104 */
1105static
1106int
1107hammer_vop_strategy_write(struct vop_strategy_args *ap)
1108{
1109 struct hammer_transaction trans;
1110 hammer_inode_t ip;
1111 struct bio *bio;
1112 struct buf *bp;
1113 int error;
1114
1115 bio = ap->a_bio;
1116 bp = bio->bio_buf;
1117 ip = ap->a_vp->v_data;
1118 hammer_start_transaction(&trans, ip->hmp);
1119
1120 /*
1121 * Delete any records overlapping our range. This function will
1122 * properly
1123 */
1124 error = hammer_delete_range(&trans, ip, bio->bio_offset,
1125 bio->bio_offset + bp->b_bufsize - 1);
1126
1127 /*
1128 * Add a single record to cover the write
1129 */
1130 if (error == 0) {
1131 error = hammer_add_data(&trans, ip, bio->bio_offset,
1132 bp->b_data, bp->b_bufsize);
66325755
MD
1133 }
1134
1135 /*
8cd0a023 1136 * If an error occured abort the transaction
66325755 1137 */
8cd0a023
MD
1138 if (error) {
1139 /* XXX undo deletion */
1140 hammer_abort_transaction(&trans);
1141 bp->b_resid = bp->b_bufsize;
1142 } else {
1143 hammer_commit_transaction(&trans);
1144 bp->b_resid = 0;
1145 }
1146 return(error);
1147}
1148
1149/*
1150 * dounlink - disconnect a directory entry
1151 *
1152 * XXX whiteout support not really in yet
1153 */
1154static int
1155hammer_dounlink(struct nchandle *nch, struct vnode *dvp, struct ucred *cred,
1156 int flags)
1157{
1158 struct hammer_transaction trans;
1159 struct namecache *ncp;
1160 hammer_inode_t dip;
1161 hammer_inode_t ip;
1162 hammer_record_ondisk_t rec;
1163 struct hammer_cursor cursor;
1164 struct vnode *vp;
1165 int64_t namekey;
1166 int error;
1167
1168 /*
1169 * Calculate the namekey and setup the key range for the scan. This
1170 * works kinda like a chained hash table where the lower 32 bits
1171 * of the namekey synthesize the chain.
1172 *
1173 * The key range is inclusive of both key_beg and key_end.
1174 */
1175 dip = VTOI(dvp);
1176 ncp = nch->ncp;
1177 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
1178
1179 hammer_init_cursor_ip(&cursor, dip);
1180 cursor.key_beg.obj_id = dip->obj_id;
1181 cursor.key_beg.key = namekey;
1182 cursor.key_beg.create_tid = dip->obj_asof;
1183 cursor.key_beg.delete_tid = 0;
1184 cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1185 cursor.key_beg.obj_type = 0;
1186
1187 cursor.key_end = cursor.key_beg;
1188 cursor.key_end.key |= 0xFFFFFFFFULL;
1189
1190 hammer_start_transaction(&trans, dip->hmp);
1191
1192 /*
1193 * Scan all matching records (the chain), locate the one matching
1194 * the requested path component. info->last_error contains the
1195 * error code on search termination and could be 0, ENOENT, or
1196 * something else.
1197 *
1198 * The hammer_ip_*() functions merge in-memory records with on-disk
1199 * records for the purposes of the search.
1200 */
1201 rec = hammer_ip_first(&cursor, dip);
1202 while (rec) {
1203 if (hammer_ip_resolve_data(&cursor) != 0)
66325755 1204 break;
8cd0a023
MD
1205 if (ncp->nc_nlen == rec->entry.base.data_len &&
1206 bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
66325755
MD
1207 break;
1208 }
8cd0a023 1209 rec = hammer_ip_next(&cursor);
66325755 1210 }
8cd0a023
MD
1211 error = cursor.last_error;
1212
1213 /*
1214 * If all is ok we have to get the inode so we can adjust nlinks.
1215 */
66325755 1216 if (error == 0) {
8cd0a023
MD
1217 ip = hammer_get_inode(dip->hmp, rec->entry.obj_id, &error);
1218 if (error == 0)
1219 error = hammer_del_directory(&trans, &cursor, dip, ip);
1220 if (error == 0) {
1221 cache_setunresolved(nch);
1222 cache_setvp(nch, NULL);
1223 /* XXX locking */
1224 if (ip->vp)
1225 cache_inval_vp(ip->vp, CINV_DESTROY);
1226 }
1227 hammer_rel_inode(ip);
1228
1229 error = hammer_vfs_vget(dip->hmp->mp, rec->entry.obj_id, &vp);
66325755
MD
1230 if (error == 0) {
1231 vn_unlock(vp);
1232 cache_setvp(nch, vp);
1233 vrele(vp);
8cd0a023
MD
1234 hammer_commit_transaction(&trans);
1235 } else {
1236 hammer_abort_transaction(&trans);
66325755 1237 }
66325755 1238 }
8cd0a023 1239 hammer_done_cursor(&cursor);
66325755 1240 return (error);
66325755
MD
1241}
1242