2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.3 2007/11/19 00:53:40 dillon Exp $
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>
51 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
52 static int hammer_vop_fsync(struct vop_fsync_args *);
53 static int hammer_vop_read(struct vop_read_args *);
54 static int hammer_vop_write(struct vop_write_args *);
55 static int hammer_vop_access(struct vop_access_args *);
56 static int hammer_vop_advlock(struct vop_advlock_args *);
57 static int hammer_vop_close(struct vop_close_args *);
58 static int hammer_vop_ncreate(struct vop_ncreate_args *);
59 static int hammer_vop_getattr(struct vop_getattr_args *);
60 static int hammer_vop_nresolve(struct vop_nresolve_args *);
61 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
62 static int hammer_vop_nlink(struct vop_nlink_args *);
63 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
64 static int hammer_vop_nmknod(struct vop_nmknod_args *);
65 static int hammer_vop_open(struct vop_open_args *);
66 static int hammer_vop_pathconf(struct vop_pathconf_args *);
67 static int hammer_vop_print(struct vop_print_args *);
68 static int hammer_vop_readdir(struct vop_readdir_args *);
69 static int hammer_vop_readlink(struct vop_readlink_args *);
70 static int hammer_vop_nremove(struct vop_nremove_args *);
71 static int hammer_vop_nrename(struct vop_nrename_args *);
72 static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
73 static int hammer_vop_setattr(struct vop_setattr_args *);
74 static int hammer_vop_strategy(struct vop_strategy_args *);
75 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
76 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
78 struct 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
109 static int hammer_dounlink(struct nchandle *nch, struct vnode *dvp,
110 struct ucred *cred, int flags);
111 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
112 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
117 hammer_vop_vnoperate(struct vop_generic_args *)
119 return (VOCALL(&hammer_vnode_vops, ap));
124 * hammer_vop_fsync { vp, waitfor }
128 hammer_vop_fsync(struct vop_fsync_args *ap)
134 * hammer_vop_read { vp, uio, ioflag, cred }
138 hammer_vop_read(struct vop_read_args *ap)
140 struct hammer_transaction trans;
141 struct hammer_inode *ip;
149 if (ap->a_vp->v_type != VREG)
153 seqcount = ap->a_ioflag >> 16;
155 hammer_start_transaction(&trans, ip->hmp);
158 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
161 while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_rec.ino_size) {
162 offset = uio->uio_offset & HAMMER_BUFMASK;
163 error = cluster_read(ap->a_vp, ip->ino_rec.ino_size,
164 uio->uio_offset - offset, HAMMER_BUFSIZE,
165 MAXBSIZE, seqcount, &bp);
170 bp->b_flags |= B_CLUSTEROK;
171 n = HAMMER_BUFSIZE - offset;
172 if (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);
181 ip->ino_rec.ino_atime = trans.tid;
182 hammer_modify_inode(&trans, ip, HAMMER_INODE_ITIMES);
185 hammer_commit_transaction(&trans);
190 * hammer_vop_write { vp, uio, ioflag, cred }
194 hammer_vop_write(struct vop_write_args *ap)
196 struct hammer_transaction trans;
197 struct hammer_inode *ip;
204 if (ap->a_vp->v_type != VREG)
210 * Create a transaction to cover the operations we perform.
212 hammer_start_transaction(&trans, ip->hmp);
218 if (ap->a_ioflag & IO_APPEND)
219 uio->uio_offset = ip->ino_rec.ino_size;
222 * Check for illegal write offsets. Valid range is 0...2^63-1
224 if (uio->uio_offset < 0 || uio->uio_offset + uio->uio_resid <= 0)
228 * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
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,
235 } else if (offset == 0 && uio->uio_offset >= ip->ino_rec.ino_size) {
236 bp = getblk(ap->a_vp, uio->uio_offset, HAMMER_BUFSIZE,
240 error = bread(ap->a_vp, uio->uio_offset - offset,
241 HAMMER_BUFSIZE, &bp);
247 n = HAMMER_BUFSIZE - offset;
248 if (n > uio->uio_resid)
250 error = uiomove((char *)bp->b_data + offset, n, uio);
255 bp->b_flags |= B_CLUSTEROK;
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);
262 if (ap->a_ioflag & IO_SYNC) {
264 } else if (ap->a_ioflag & IO_DIRECT) {
271 hammer_abort_transaction(&trans);
273 hammer_commit_transaction(&trans);
278 * hammer_vop_access { vp, mode, cred }
282 hammer_vop_access(struct vop_access_args *ap)
284 struct hammer_inode *ip = VTOI(ap->a_vp);
289 uid = hammer_to_unix_xid(&ip->ino_data.uid);
290 gid = hammer_to_unix_xid(&ip->ino_data.gid);
292 error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
293 ip->ino_data.uflags);
298 * hammer_vop_advlock { vp, id, op, fl, flags }
302 hammer_vop_advlock(struct vop_advlock_args *ap)
304 struct hammer_inode *ip = VTOI(ap->a_vp);
306 return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
310 * hammer_vop_close { vp, fflag }
314 hammer_vop_close(struct vop_close_args *ap)
320 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
322 * The operating system has already ensured that the directory entry
323 * does not exist and done all appropriate namespace locking.
327 hammer_vop_ncreate(struct vop_ncreate_args *ap)
329 struct hammer_transaction trans;
330 struct hammer_inode *dip;
331 struct hammer_inode *nip;
332 struct nchandle *nch;
336 dip = VTOI(ap->a_dvp);
339 * Create a transaction to cover the operations we perform.
341 hammer_start_transaction(&trans, dip->hmp);
344 * Create a new filesystem object of the requested type. The
345 * returned inode will be referenceds but not locked.
348 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
350 hammer_abort_transaction(&trans);
356 * Add the new filesystem object to the directory. This will also
357 * bump the inode's link count.
359 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
365 hammer_rel_inode(nip);
366 hammer_abort_transaction(&trans);
369 hammer_commit_transaction(&trans);
370 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
371 hammer_rel_inode(nip);
377 * hammer_vop_getattr { vp, vap }
381 hammer_vop_getattr(struct vop_getattr_args *ap)
383 struct hammer_inode *ip = VTOI(ap->a_vp);
384 struct vattr *vap = ap->a_vap;
387 if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
388 (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
393 hammer_itimes(ap->a_vp);
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);
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 |
425 * hammer_vop_nresolve { nch, dvp, cred }
427 * Locate the requested directory entry.
431 hammer_vop_nresolve(struct vop_nresolve_args *ap)
433 struct namecache *ncp;
434 struct hammer_inode *dip;
435 struct hammer_cursor cursor;
436 union hammer_record_ondisk *rec;
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.
446 * The key range is inclusive of both key_beg and key_end.
448 dip = VTOI(ap->a_dvp);
449 ncp = ap->a_nch->ncp;
450 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
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;
460 cursor.key_end = cursor.key_beg;
461 cursor.key_end.key |= 0xFFFFFFFFULL;
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
469 * The hammer_ip_*() functions merge in-memory records with on-disk
470 * records for the purposes of the search.
472 rec = hammer_ip_first(&cursor, dip);
474 if (hammer_ip_resolve_data(&cursor) != 0) /* sets last_error */
476 if (ncp->nc_nlen == rec->entry.base.data_len &&
477 bcmp(ncp->nc_name, (void *)cursor.data, ncp->nc_nlen) == 0) {
480 rec = hammer_ip_next(&cursor);
482 error = cursor.last_error;
484 error = hammer_vfs_vget(dip->hmp->mp, rec->entry.obj_id, &vp);
487 cache_setvp(ap->a_nch, vp);
490 } else if (error == ENOENT) {
491 cache_setvp(ap->a_nch, NULL);
493 hammer_done_cursor(&cursor);
498 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
500 * Locate the parent directory of a directory vnode.
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
509 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
511 struct hammer_inode *dip;
512 u_int64_t parent_obj_id;
514 dip = VTOI(ap->a_dvp);
515 if ((parent_obj_id = dip->ino_data.parent_obj_id) == 0) {
519 return(hammer_vfs_vget(dip->hmp->mp, parent_obj_id, ap->a_vpp));
523 * hammer_vop_nlink { nch, dvp, vp, cred }
527 hammer_vop_nlink(struct vop_nlink_args *ap)
529 struct hammer_transaction trans;
530 struct hammer_inode *dip;
531 struct hammer_inode *ip;
532 struct nchandle *nch;
536 dip = VTOI(ap->a_dvp);
540 * Create a transaction to cover the operations we perform.
542 hammer_start_transaction(&trans, dip->hmp);
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.
549 error = hammer_add_directory(&trans, dip, nch->ncp, ip);
555 hammer_abort_transaction(&trans);
557 hammer_commit_transaction(&trans);
563 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
565 * The operating system has already ensured that the directory entry
566 * does not exist and done all appropriate namespace locking.
570 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
572 struct hammer_transaction trans;
573 struct hammer_inode *dip;
574 struct hammer_inode *nip;
575 struct nchandle *nch;
579 dip = VTOI(ap->a_dvp);
582 * Create a transaction to cover the operations we perform.
584 hammer_start_transaction(&trans, dip->hmp);
587 * Create a new filesystem object of the requested type. The
588 * returned inode will be referenced but not locked.
590 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
592 hammer_abort_transaction(&trans);
598 * Add the new filesystem object to the directory. This will also
599 * bump the inode's link count.
601 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
607 hammer_rel_inode(nip);
608 hammer_abort_transaction(&trans);
611 hammer_commit_transaction(&trans);
612 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
613 hammer_rel_inode(nip);
619 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
621 * The operating system has already ensured that the directory entry
622 * does not exist and done all appropriate namespace locking.
626 hammer_vop_nmknod(struct vop_nmknod_args *ap)
628 struct hammer_transaction trans;
629 struct hammer_inode *dip;
630 struct hammer_inode *nip;
631 struct nchandle *nch;
635 dip = VTOI(ap->a_dvp);
638 * Create a transaction to cover the operations we perform.
640 hammer_start_transaction(&trans, dip->hmp);
643 * Create a new filesystem object of the requested type. The
644 * returned inode will be referenced but not locked.
646 error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
648 hammer_abort_transaction(&trans);
654 * Add the new filesystem object to the directory. This will also
655 * bump the inode's link count.
657 error = hammer_add_directory(&trans, dip, nch->ncp, nip);
663 hammer_rel_inode(nip);
664 hammer_abort_transaction(&trans);
667 hammer_commit_transaction(&trans);
668 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
669 hammer_rel_inode(nip);
675 * hammer_vop_open { vp, mode, cred, fp }
679 hammer_vop_open(struct vop_open_args *ap)
685 * hammer_vop_pathconf { vp, name, retval }
689 hammer_vop_pathconf(struct vop_pathconf_args *ap)
695 * hammer_vop_print { vp }
699 hammer_vop_print(struct vop_print_args *ap)
705 * hammer_vop_readdir { vp, uio, cred, *eofflag }
709 hammer_vop_readdir(struct vop_readdir_args *ap)
715 * hammer_vop_readlink { vp, uio, cred }
719 hammer_vop_readlink(struct vop_readlink_args *ap)
725 * hammer_vop_nremove { nch, dvp, cred }
729 hammer_vop_nremove(struct vop_nremove_args *ap)
731 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
735 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
739 hammer_vop_nrename(struct vop_nrename_args *ap)
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;
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);
759 * Extract the hammer_inode from fncp and add link to the target
762 ip = VTOI(fncp->nc_vp);
763 KKASSERT(ip != NULL);
765 error = hammer_add_directory(&trans, tdip, tncp, ip);
768 * Locate the record in the originating directory and remove it.
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.
774 * The key range is inclusive of both key_beg and key_end.
776 namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
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;
786 cursor.key_end = cursor.key_beg;
787 cursor.key_end.key |= 0xFFFFFFFFULL;
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
795 * The hammer_ip_*() functions merge in-memory records with on-disk
796 * records for the purposes of the search.
798 rec = hammer_ip_first(&cursor, fdip);
800 if (hammer_ip_resolve_data(&cursor) != 0)
802 if (fncp->nc_nlen == rec->entry.base.data_len &&
803 bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
806 rec = hammer_ip_next(&cursor);
808 error = cursor.last_error;
811 * If all is ok we have to get the inode so we can adjust nlinks.
815 error = hammer_del_directory(&trans, &cursor, fdip, ip);
817 cache_rename(ap->a_fnch, ap->a_tnch);
818 cache_setvp(ap->a_tnch, ip->vp);
822 hammer_commit_transaction(&trans);
824 hammer_abort_transaction(&trans);
826 hammer_done_cursor(&cursor);
831 * hammer_vop_nrmdir { nch, dvp, cred }
835 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
837 /* XXX check that directory is empty */
839 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
843 * hammer_vop_setattr { vp, vap, cred }
847 hammer_vop_setattr(struct vop_setattr_args *ap)
849 struct hammer_transaction trans;
851 struct hammer_inode *ip;
858 ip = ap->a_vp->v_data;
861 if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
864 hammer_start_transaction(&trans, ip->hmp);
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),
873 if (ip->ino_data.uflags != flags) {
874 ip->ino_data.uflags = flags;
875 modflags |= HAMMER_INODE_DDIRTY;
877 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
884 if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
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;
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;
902 if (vap->va_size != VNOVAL) {
903 switch(ap->a_vp->v_type) {
906 error = hammer_delete_range(&trans, ip,
908 0x7FFFFFFFFFFFFFFFLL);
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;
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;
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;
933 hammer_abort_transaction(&trans);
936 hammer_modify_inode(&trans, ip, modflags);
937 hammer_commit_transaction(&trans);
943 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
947 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
953 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
957 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
959 return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, ap->a_flags));
963 * hammer_vop_strategy { vp, bio }
965 * Strategy call, used for regular file read & write only. Note that the
966 * bp may represent a cluster.
968 * To simplify operation and allow better optimizations in the future,
969 * this code does not make any assumptions with regards to buffer alignment
974 hammer_vop_strategy(struct vop_strategy_args *ap)
979 bp = ap->a_bio->bio_buf;
983 error = hammer_vop_strategy_read(ap);
986 error = hammer_vop_strategy_write(ap);
994 bp->b_flags |= B_ERROR;
1000 * Read from a regular file. Iterate the related records and fill in the
1001 * BIO/BUF. Gaps are zero-filled.
1003 * The support code in hammer_object.c should be used to deal with mixed
1004 * in-memory and on-disk records.
1010 hammer_vop_strategy_read(struct vop_strategy_args *ap)
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;
1027 hammer_init_cursor_ip(&cursor, ip);
1030 * Key range (begin and end inclusive) to scan. Note that the key's
1031 * stored in the actual records represent the
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;
1040 cursor.key_end = cursor.key_beg;
1041 cursor.key_end.key = bio->bio_offset + bp->b_bufsize - 1;
1043 rec = hammer_ip_first(&cursor, ip);
1047 if (hammer_ip_resolve_data(&cursor) != 0)
1049 base = &rec->base.base;
1051 rec_offset = base->key - rec->data.base.data_len;
1056 n = (int)(rec_offset - (bio->bio_offset + boff));
1058 kprintf("zfill %d bytes\n", n);
1059 bzero((char *)bp->b_data + boff, n);
1065 * Calculate the data offset in the record and the number
1066 * of bytes we can copy.
1069 n = rec->data.base.data_len - roff;
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);
1075 if (boff == bp->b_bufsize)
1077 rec = hammer_ip_next(&cursor);
1079 hammer_done_cursor(&cursor);
1082 * There may have been a gap after the last record
1084 error = cursor.last_error;
1085 if (error == ENOENT)
1087 if (error == 0 && boff != bp->b_bufsize) {
1088 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1089 /* boff = bp->b_bufsize; */
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.
1102 * The support code in hammer_object.c should be used to deal with mixed
1103 * in-memory and on-disk records.
1107 hammer_vop_strategy_write(struct vop_strategy_args *ap)
1109 struct hammer_transaction trans;
1117 ip = ap->a_vp->v_data;
1118 hammer_start_transaction(&trans, ip->hmp);
1121 * Delete any records overlapping our range. This function will
1124 error = hammer_delete_range(&trans, ip, bio->bio_offset,
1125 bio->bio_offset + bp->b_bufsize - 1);
1128 * Add a single record to cover the write
1131 error = hammer_add_data(&trans, ip, bio->bio_offset,
1132 bp->b_data, bp->b_bufsize);
1136 * If an error occured abort the transaction
1139 /* XXX undo deletion */
1140 hammer_abort_transaction(&trans);
1141 bp->b_resid = bp->b_bufsize;
1143 hammer_commit_transaction(&trans);
1150 * dounlink - disconnect a directory entry
1152 * XXX whiteout support not really in yet
1155 hammer_dounlink(struct nchandle *nch, struct vnode *dvp, struct ucred *cred,
1158 struct hammer_transaction trans;
1159 struct namecache *ncp;
1162 hammer_record_ondisk_t rec;
1163 struct hammer_cursor cursor;
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.
1173 * The key range is inclusive of both key_beg and key_end.
1177 namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
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;
1187 cursor.key_end = cursor.key_beg;
1188 cursor.key_end.key |= 0xFFFFFFFFULL;
1190 hammer_start_transaction(&trans, dip->hmp);
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
1198 * The hammer_ip_*() functions merge in-memory records with on-disk
1199 * records for the purposes of the search.
1201 rec = hammer_ip_first(&cursor, dip);
1203 if (hammer_ip_resolve_data(&cursor) != 0)
1205 if (ncp->nc_nlen == rec->entry.base.data_len &&
1206 bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
1209 rec = hammer_ip_next(&cursor);
1211 error = cursor.last_error;
1214 * If all is ok we have to get the inode so we can adjust nlinks.
1217 ip = hammer_get_inode(dip->hmp, rec->entry.obj_id, &error);
1219 error = hammer_del_directory(&trans, &cursor, dip, ip);
1221 cache_setunresolved(nch);
1222 cache_setvp(nch, NULL);
1225 cache_inval_vp(ip->vp, CINV_DESTROY);
1227 hammer_rel_inode(ip);
1229 error = hammer_vfs_vget(dip->hmp->mp, rec->entry.obj_id, &vp);
1232 cache_setvp(nch, vp);
1234 hammer_commit_transaction(&trans);
1236 hammer_abort_transaction(&trans);
1239 hammer_done_cursor(&cursor);