2 * Copyright (c) 2007-2008 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 1.102 2008/10/16 17:24:16 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>
46 #include <sys/dirent.h>
48 #include <vm/vm_extern.h>
49 #include <vfs/fifofs/fifo.h>
55 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
56 static int hammer_vop_fsync(struct vop_fsync_args
*);
57 static int hammer_vop_read(struct vop_read_args
*);
58 static int hammer_vop_write(struct vop_write_args
*);
59 static int hammer_vop_access(struct vop_access_args
*);
60 static int hammer_vop_advlock(struct vop_advlock_args
*);
61 static int hammer_vop_close(struct vop_close_args
*);
62 static int hammer_vop_ncreate(struct vop_ncreate_args
*);
63 static int hammer_vop_getattr(struct vop_getattr_args
*);
64 static int hammer_vop_nresolve(struct vop_nresolve_args
*);
65 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args
*);
66 static int hammer_vop_nlink(struct vop_nlink_args
*);
67 static int hammer_vop_nmkdir(struct vop_nmkdir_args
*);
68 static int hammer_vop_nmknod(struct vop_nmknod_args
*);
69 static int hammer_vop_open(struct vop_open_args
*);
70 static int hammer_vop_print(struct vop_print_args
*);
71 static int hammer_vop_readdir(struct vop_readdir_args
*);
72 static int hammer_vop_readlink(struct vop_readlink_args
*);
73 static int hammer_vop_nremove(struct vop_nremove_args
*);
74 static int hammer_vop_nrename(struct vop_nrename_args
*);
75 static int hammer_vop_nrmdir(struct vop_nrmdir_args
*);
76 static int hammer_vop_markatime(struct vop_markatime_args
*);
77 static int hammer_vop_setattr(struct vop_setattr_args
*);
78 static int hammer_vop_strategy(struct vop_strategy_args
*);
79 static int hammer_vop_bmap(struct vop_bmap_args
*ap
);
80 static int hammer_vop_nsymlink(struct vop_nsymlink_args
*);
81 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args
*);
82 static int hammer_vop_ioctl(struct vop_ioctl_args
*);
83 static int hammer_vop_mountctl(struct vop_mountctl_args
*);
84 static int hammer_vop_kqfilter (struct vop_kqfilter_args
*);
86 static int hammer_vop_fifoclose (struct vop_close_args
*);
87 static int hammer_vop_fiforead (struct vop_read_args
*);
88 static int hammer_vop_fifowrite (struct vop_write_args
*);
89 static int hammer_vop_fifokqfilter (struct vop_kqfilter_args
*);
91 struct vop_ops hammer_vnode_vops
= {
92 .vop_default
= vop_defaultop
,
93 .vop_fsync
= hammer_vop_fsync
,
94 .vop_getpages
= vop_stdgetpages
,
95 .vop_putpages
= vop_stdputpages
,
96 .vop_read
= hammer_vop_read
,
97 .vop_write
= hammer_vop_write
,
98 .vop_access
= hammer_vop_access
,
99 .vop_advlock
= hammer_vop_advlock
,
100 .vop_close
= hammer_vop_close
,
101 .vop_ncreate
= hammer_vop_ncreate
,
102 .vop_getattr
= hammer_vop_getattr
,
103 .vop_inactive
= hammer_vop_inactive
,
104 .vop_reclaim
= hammer_vop_reclaim
,
105 .vop_nresolve
= hammer_vop_nresolve
,
106 .vop_nlookupdotdot
= hammer_vop_nlookupdotdot
,
107 .vop_nlink
= hammer_vop_nlink
,
108 .vop_nmkdir
= hammer_vop_nmkdir
,
109 .vop_nmknod
= hammer_vop_nmknod
,
110 .vop_open
= hammer_vop_open
,
111 .vop_pathconf
= vop_stdpathconf
,
112 .vop_print
= hammer_vop_print
,
113 .vop_readdir
= hammer_vop_readdir
,
114 .vop_readlink
= hammer_vop_readlink
,
115 .vop_nremove
= hammer_vop_nremove
,
116 .vop_nrename
= hammer_vop_nrename
,
117 .vop_nrmdir
= hammer_vop_nrmdir
,
118 .vop_markatime
= hammer_vop_markatime
,
119 .vop_setattr
= hammer_vop_setattr
,
120 .vop_bmap
= hammer_vop_bmap
,
121 .vop_strategy
= hammer_vop_strategy
,
122 .vop_nsymlink
= hammer_vop_nsymlink
,
123 .vop_nwhiteout
= hammer_vop_nwhiteout
,
124 .vop_ioctl
= hammer_vop_ioctl
,
125 .vop_mountctl
= hammer_vop_mountctl
,
126 .vop_kqfilter
= hammer_vop_kqfilter
129 struct vop_ops hammer_spec_vops
= {
130 .vop_default
= vop_defaultop
,
131 .vop_fsync
= hammer_vop_fsync
,
132 .vop_read
= vop_stdnoread
,
133 .vop_write
= vop_stdnowrite
,
134 .vop_access
= hammer_vop_access
,
135 .vop_close
= hammer_vop_close
,
136 .vop_markatime
= hammer_vop_markatime
,
137 .vop_getattr
= hammer_vop_getattr
,
138 .vop_inactive
= hammer_vop_inactive
,
139 .vop_reclaim
= hammer_vop_reclaim
,
140 .vop_setattr
= hammer_vop_setattr
143 struct vop_ops hammer_fifo_vops
= {
144 .vop_default
= fifo_vnoperate
,
145 .vop_fsync
= hammer_vop_fsync
,
146 .vop_read
= hammer_vop_fiforead
,
147 .vop_write
= hammer_vop_fifowrite
,
148 .vop_access
= hammer_vop_access
,
149 .vop_close
= hammer_vop_fifoclose
,
150 .vop_markatime
= hammer_vop_markatime
,
151 .vop_getattr
= hammer_vop_getattr
,
152 .vop_inactive
= hammer_vop_inactive
,
153 .vop_reclaim
= hammer_vop_reclaim
,
154 .vop_setattr
= hammer_vop_setattr
,
155 .vop_kqfilter
= hammer_vop_fifokqfilter
160 hammer_knote(struct vnode
*vp
, int flags
)
163 KNOTE(&vp
->v_pollinfo
.vpi_selinfo
.si_note
, flags
);
166 #ifdef DEBUG_TRUNCATE
167 struct hammer_inode
*HammerTruncIp
;
170 static int hammer_dounlink(hammer_transaction_t trans
, struct nchandle
*nch
,
171 struct vnode
*dvp
, struct ucred
*cred
,
172 int flags
, int isdir
);
173 static int hammer_vop_strategy_read(struct vop_strategy_args
*ap
);
174 static int hammer_vop_strategy_write(struct vop_strategy_args
*ap
);
179 hammer_vop_vnoperate(struct vop_generic_args
*)
181 return (VOCALL(&hammer_vnode_vops
, ap
));
186 * hammer_vop_fsync { vp, waitfor }
188 * fsync() an inode to disk and wait for it to be completely committed
189 * such that the information would not be undone if a crash occured after
194 hammer_vop_fsync(struct vop_fsync_args
*ap
)
196 hammer_inode_t ip
= VTOI(ap
->a_vp
);
198 ++hammer_count_fsyncs
;
199 vfsync(ap
->a_vp
, ap
->a_waitfor
, 1, NULL
, NULL
);
200 hammer_flush_inode(ip
, HAMMER_FLUSH_SIGNAL
);
201 if (ap
->a_waitfor
== MNT_WAIT
) {
203 hammer_wait_inode(ip
);
204 vn_lock(ap
->a_vp
, LK_EXCLUSIVE
| LK_RETRY
);
210 * hammer_vop_read { vp, uio, ioflag, cred }
216 hammer_vop_read(struct vop_read_args
*ap
)
218 struct hammer_transaction trans
;
231 if (ap
->a_vp
->v_type
!= VREG
)
238 * Allow the UIO's size to override the sequential heuristic.
240 blksize
= hammer_blocksize(uio
->uio_offset
);
241 seqcount
= (uio
->uio_resid
+ (blksize
- 1)) / blksize
;
242 ioseqcount
= ap
->a_ioflag
>> 16;
243 if (seqcount
< ioseqcount
)
244 seqcount
= ioseqcount
;
247 * Temporary hack until more of HAMMER can be made MPSAFE.
250 if (curthread
->td_mpcount
) {
252 hammer_start_transaction(&trans
, ip
->hmp
);
257 hammer_start_transaction(&trans
, ip
->hmp
);
262 * If reading or writing a huge amount of data we have to break
263 * atomicy and allow the operation to be interrupted by a signal
264 * or it can DOS the machine.
266 bigread
= (uio
->uio_resid
> 100 * 1024 * 1024);
269 * Access the data typically in HAMMER_BUFSIZE blocks via the
270 * buffer cache, but HAMMER may use a variable block size based
273 * XXX Temporary hack, delay the start transaction while we remain
274 * MPSAFE. NOTE: ino_data.size cannot change while vnode is
277 while (uio
->uio_resid
> 0 && uio
->uio_offset
< ip
->ino_data
.size
) {
281 blksize
= hammer_blocksize(uio
->uio_offset
);
282 offset
= (int)uio
->uio_offset
& (blksize
- 1);
283 base_offset
= uio
->uio_offset
- offset
;
285 if (bigread
&& (error
= hammer_signal_check(ip
->hmp
)) != 0)
291 bp
= getcacheblk(ap
->a_vp
, base_offset
);
300 if (got_mplock
== 0) {
303 hammer_start_transaction(&trans
, ip
->hmp
);
306 if (hammer_cluster_enable
) {
308 * Use file_limit to prevent cluster_read() from
309 * creating buffers of the wrong block size past
312 file_limit
= ip
->ino_data
.size
;
313 if (base_offset
< HAMMER_XDEMARC
&&
314 file_limit
> HAMMER_XDEMARC
) {
315 file_limit
= HAMMER_XDEMARC
;
317 error
= cluster_read(ap
->a_vp
,
318 file_limit
, base_offset
,
322 error
= bread(ap
->a_vp
, base_offset
, blksize
, &bp
);
325 kprintf("error %d\n", error
);
331 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
332 n
= blksize
- offset
;
333 if (n
> uio
->uio_resid
)
335 if (n
> ip
->ino_data
.size
- uio
->uio_offset
)
336 n
= (int)(ip
->ino_data
.size
- uio
->uio_offset
);
337 error
= uiomove((char *)bp
->b_data
+ offset
, n
, uio
);
339 /* data has a lower priority then meta-data */
340 bp
->b_flags
|= B_AGE
;
344 hammer_stats_file_read
+= n
;
348 * XXX only update the atime if we had to get the MP lock.
349 * XXX hack hack hack, fixme.
352 if ((ip
->flags
& HAMMER_INODE_RO
) == 0 &&
353 (ip
->hmp
->mp
->mnt_flag
& MNT_NOATIME
) == 0) {
354 ip
->ino_data
.atime
= trans
.time
;
355 hammer_modify_inode(ip
, HAMMER_INODE_ATIME
);
357 hammer_done_transaction(&trans
);
365 * hammer_vop_write { vp, uio, ioflag, cred }
369 hammer_vop_write(struct vop_write_args
*ap
)
371 struct hammer_transaction trans
;
372 struct hammer_inode
*ip
;
385 if (ap
->a_vp
->v_type
!= VREG
)
391 seqcount
= ap
->a_ioflag
>> 16;
393 if (ip
->flags
& HAMMER_INODE_RO
)
397 * Create a transaction to cover the operations we perform.
399 hammer_start_transaction(&trans
, hmp
);
405 if (ap
->a_ioflag
& IO_APPEND
)
406 uio
->uio_offset
= ip
->ino_data
.size
;
409 * Check for illegal write offsets. Valid range is 0...2^63-1.
411 * NOTE: the base_off assignment is required to work around what
412 * I consider to be a GCC-4 optimization bug.
414 if (uio
->uio_offset
< 0) {
415 hammer_done_transaction(&trans
);
418 base_offset
= uio
->uio_offset
+ uio
->uio_resid
; /* work around gcc-4 */
419 if (uio
->uio_resid
> 0 && base_offset
<= uio
->uio_offset
) {
420 hammer_done_transaction(&trans
);
425 * If reading or writing a huge amount of data we have to break
426 * atomicy and allow the operation to be interrupted by a signal
427 * or it can DOS the machine.
429 bigwrite
= (uio
->uio_resid
> 100 * 1024 * 1024);
432 * Access the data typically in HAMMER_BUFSIZE blocks via the
433 * buffer cache, but HAMMER may use a variable block size based
436 while (uio
->uio_resid
> 0) {
441 if ((error
= hammer_checkspace(hmp
, HAMMER_CHKSPC_WRITE
)) != 0)
443 if (bigwrite
&& (error
= hammer_signal_check(hmp
)) != 0)
446 blksize
= hammer_blocksize(uio
->uio_offset
);
449 * Do not allow HAMMER to blow out the buffer cache. Very
450 * large UIOs can lockout other processes due to bwillwrite()
453 * The hammer inode is not locked during these operations.
454 * The vnode is locked which can interfere with the pageout
455 * daemon for non-UIO_NOCOPY writes but should not interfere
456 * with the buffer cache. Even so, we cannot afford to
457 * allow the pageout daemon to build up too many dirty buffer
460 * Only call this if we aren't being recursively called from
461 * a virtual disk device (vn), else we may deadlock.
463 if ((ap
->a_ioflag
& IO_RECURSE
) == 0)
467 * Control the number of pending records associated with
468 * this inode. If too many have accumulated start a
469 * flush. Try to maintain a pipeline with the flusher.
471 if (ip
->rsv_recs
>= hammer_limit_inode_recs
) {
472 hammer_flush_inode(ip
, HAMMER_FLUSH_SIGNAL
);
474 if (ip
->rsv_recs
>= hammer_limit_inode_recs
* 2) {
475 while (ip
->rsv_recs
>= hammer_limit_inode_recs
) {
476 tsleep(&ip
->rsv_recs
, 0, "hmrwww", hz
);
478 hammer_flush_inode(ip
, HAMMER_FLUSH_SIGNAL
);
483 * Do not allow HAMMER to blow out system memory by
484 * accumulating too many records. Records are so well
485 * decoupled from the buffer cache that it is possible
486 * for userland to push data out to the media via
487 * direct-write, but build up the records queued to the
488 * backend faster then the backend can flush them out.
489 * HAMMER has hit its write limit but the frontend has
490 * no pushback to slow it down.
492 if (hmp
->rsv_recs
> hammer_limit_recs
/ 2) {
494 * Get the inode on the flush list
496 if (ip
->rsv_recs
>= 64)
497 hammer_flush_inode(ip
, HAMMER_FLUSH_SIGNAL
);
498 else if (ip
->rsv_recs
>= 16)
499 hammer_flush_inode(ip
, 0);
502 * Keep the flusher going if the system keeps
505 delta
= hmp
->count_newrecords
-
506 hmp
->last_newrecords
;
507 if (delta
< 0 || delta
> hammer_limit_recs
/ 2) {
508 hmp
->last_newrecords
= hmp
->count_newrecords
;
509 hammer_sync_hmp(hmp
, MNT_NOWAIT
);
513 * If we have gotten behind start slowing
516 delta
= (hmp
->rsv_recs
- hammer_limit_recs
) *
517 hz
/ hammer_limit_recs
;
519 tsleep(&trans
, 0, "hmrslo", delta
);
524 * Calculate the blocksize at the current offset and figure
525 * out how much we can actually write.
527 blkmask
= blksize
- 1;
528 offset
= (int)uio
->uio_offset
& blkmask
;
529 base_offset
= uio
->uio_offset
& ~(int64_t)blkmask
;
530 n
= blksize
- offset
;
531 if (n
> uio
->uio_resid
)
533 if (uio
->uio_offset
+ n
> ip
->ino_data
.size
) {
534 vnode_pager_setsize(ap
->a_vp
, uio
->uio_offset
+ n
);
536 kflags
|= NOTE_EXTEND
;
539 if (uio
->uio_segflg
== UIO_NOCOPY
) {
541 * Issuing a write with the same data backing the
542 * buffer. Instantiate the buffer to collect the
543 * backing vm pages, then read-in any missing bits.
545 * This case is used by vop_stdputpages().
547 bp
= getblk(ap
->a_vp
, base_offset
,
548 blksize
, GETBLK_BHEAVY
, 0);
549 if ((bp
->b_flags
& B_CACHE
) == 0) {
551 error
= bread(ap
->a_vp
, base_offset
,
554 } else if (offset
== 0 && uio
->uio_resid
>= blksize
) {
556 * Even though we are entirely overwriting the buffer
557 * we may still have to zero it out to avoid a
558 * mmap/write visibility issue.
560 bp
= getblk(ap
->a_vp
, base_offset
, blksize
, GETBLK_BHEAVY
, 0);
561 if ((bp
->b_flags
& B_CACHE
) == 0)
563 } else if (base_offset
>= ip
->ino_data
.size
) {
565 * If the base offset of the buffer is beyond the
566 * file EOF, we don't have to issue a read.
568 bp
= getblk(ap
->a_vp
, base_offset
,
569 blksize
, GETBLK_BHEAVY
, 0);
573 * Partial overwrite, read in any missing bits then
574 * replace the portion being written.
576 error
= bread(ap
->a_vp
, base_offset
, blksize
, &bp
);
581 error
= uiomove((char *)bp
->b_data
+ offset
,
586 * If we screwed up we have to undo any VM size changes we
592 vtruncbuf(ap
->a_vp
, ip
->ino_data
.size
,
593 hammer_blocksize(ip
->ino_data
.size
));
597 kflags
|= NOTE_WRITE
;
598 hammer_stats_file_write
+= n
;
599 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
600 if (ip
->ino_data
.size
< uio
->uio_offset
) {
601 ip
->ino_data
.size
= uio
->uio_offset
;
602 flags
= HAMMER_INODE_DDIRTY
;
603 vnode_pager_setsize(ap
->a_vp
, ip
->ino_data
.size
);
607 ip
->ino_data
.mtime
= trans
.time
;
608 flags
|= HAMMER_INODE_MTIME
| HAMMER_INODE_BUFS
;
609 hammer_modify_inode(ip
, flags
);
612 * Once we dirty the buffer any cached zone-X offset
613 * becomes invalid. HAMMER NOTE: no-history mode cannot
614 * allow overwriting over the same data sector unless
615 * we provide UNDOs for the old data, which we don't.
617 bp
->b_bio2
.bio_offset
= NOOFFSET
;
620 * Final buffer disposition.
622 * Because meta-data updates are deferred, HAMMER is
623 * especially sensitive to excessive bdwrite()s because
624 * the I/O stream is not broken up by disk reads. So the
625 * buffer cache simply cannot keep up.
627 * WARNING! blksize is variable. cluster_write() is
628 * expected to not blow up if it encounters buffers that
629 * do not match the passed blksize.
631 bp
->b_flags
|= B_AGE
;
632 if (ap
->a_ioflag
& IO_SYNC
) {
634 } else if (ap
->a_ioflag
& IO_DIRECT
) {
636 } else if (offset
+ n
== blksize
) {
637 if (hammer_cluster_enable
== 0 ||
638 (ap
->a_vp
->v_mount
->mnt_flag
& MNT_NOCLUSTERW
)) {
641 cluster_write(bp
, ip
->ino_data
.size
,
648 hammer_done_transaction(&trans
);
649 hammer_knote(ap
->a_vp
, kflags
);
654 * hammer_vop_access { vp, mode, cred }
658 hammer_vop_access(struct vop_access_args
*ap
)
660 struct hammer_inode
*ip
= VTOI(ap
->a_vp
);
665 ++hammer_stats_file_iopsr
;
666 uid
= hammer_to_unix_xid(&ip
->ino_data
.uid
);
667 gid
= hammer_to_unix_xid(&ip
->ino_data
.gid
);
669 error
= vop_helper_access(ap
, uid
, gid
, ip
->ino_data
.mode
,
670 ip
->ino_data
.uflags
);
675 * hammer_vop_advlock { vp, id, op, fl, flags }
679 hammer_vop_advlock(struct vop_advlock_args
*ap
)
681 hammer_inode_t ip
= VTOI(ap
->a_vp
);
683 return (lf_advlock(ap
, &ip
->advlock
, ip
->ino_data
.size
));
687 * hammer_vop_close { vp, fflag }
691 hammer_vop_close(struct vop_close_args
*ap
)
693 /*hammer_inode_t ip = VTOI(ap->a_vp);*/
694 return (vop_stdclose(ap
));
698 * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
700 * The operating system has already ensured that the directory entry
701 * does not exist and done all appropriate namespace locking.
705 hammer_vop_ncreate(struct vop_ncreate_args
*ap
)
707 struct hammer_transaction trans
;
708 struct hammer_inode
*dip
;
709 struct hammer_inode
*nip
;
710 struct nchandle
*nch
;
714 dip
= VTOI(ap
->a_dvp
);
716 if (dip
->flags
& HAMMER_INODE_RO
)
718 if ((error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
722 * Create a transaction to cover the operations we perform.
724 hammer_start_transaction(&trans
, dip
->hmp
);
725 ++hammer_stats_file_iopsw
;
728 * Create a new filesystem object of the requested type. The
729 * returned inode will be referenced and shared-locked to prevent
730 * it from being moved to the flusher.
732 error
= hammer_create_inode(&trans
, ap
->a_vap
, ap
->a_cred
,
733 dip
, nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
736 hkprintf("hammer_create_inode error %d\n", error
);
737 hammer_done_transaction(&trans
);
743 * Add the new filesystem object to the directory. This will also
744 * bump the inode's link count.
746 error
= hammer_ip_add_directory(&trans
, dip
,
747 nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
750 hkprintf("hammer_ip_add_directory error %d\n", error
);
756 hammer_rel_inode(nip
, 0);
757 hammer_done_transaction(&trans
);
760 error
= hammer_get_vnode(nip
, ap
->a_vpp
);
761 hammer_done_transaction(&trans
);
762 hammer_rel_inode(nip
, 0);
764 cache_setunresolved(ap
->a_nch
);
765 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
767 hammer_knote(ap
->a_dvp
, NOTE_WRITE
);
773 * hammer_vop_getattr { vp, vap }
775 * Retrieve an inode's attribute information. When accessing inodes
776 * historically we fake the atime field to ensure consistent results.
777 * The atime field is stored in the B-Tree element and allowed to be
778 * updated without cycling the element.
784 hammer_vop_getattr(struct vop_getattr_args
*ap
)
786 struct hammer_inode
*ip
= VTOI(ap
->a_vp
);
787 struct vattr
*vap
= ap
->a_vap
;
790 * We want the fsid to be different when accessing a filesystem
791 * with different as-of's so programs like diff don't think
792 * the files are the same.
794 * We also want the fsid to be the same when comparing snapshots,
795 * or when comparing mirrors (which might be backed by different
796 * physical devices). HAMMER fsids are based on the PFS's
799 * XXX there is a chance of collision here. The va_fsid reported
800 * by stat is different from the more involved fsid used in the
803 ++hammer_stats_file_iopsr
;
804 hammer_lock_sh(&ip
->lock
);
805 vap
->va_fsid
= ip
->pfsm
->fsid_udev
^ (u_int32_t
)ip
->obj_asof
^
806 (u_int32_t
)(ip
->obj_asof
>> 32);
808 vap
->va_fileid
= ip
->ino_leaf
.base
.obj_id
;
809 vap
->va_mode
= ip
->ino_data
.mode
;
810 vap
->va_nlink
= ip
->ino_data
.nlinks
;
811 vap
->va_uid
= hammer_to_unix_xid(&ip
->ino_data
.uid
);
812 vap
->va_gid
= hammer_to_unix_xid(&ip
->ino_data
.gid
);
815 vap
->va_size
= ip
->ino_data
.size
;
818 * Special case for @@PFS softlinks. The actual size of the
819 * expanded softlink is "@@0x%016llx:%05d" == 26 bytes.
820 * or for MAX_TID is "@@-1:%05d" == 10 bytes.
822 if (ip
->ino_data
.obj_type
== HAMMER_OBJTYPE_SOFTLINK
&&
823 ip
->ino_data
.size
== 10 &&
824 ip
->obj_asof
== HAMMER_MAX_TID
&&
825 ip
->obj_localization
== 0 &&
826 strncmp(ip
->ino_data
.ext
.symlink
, "@@PFS", 5) == 0) {
827 if (ip
->pfsm
->pfsd
.mirror_flags
& HAMMER_PFSD_SLAVE
)
834 * We must provide a consistent atime and mtime for snapshots
835 * so people can do a 'tar cf - ... | md5' on them and get
836 * consistent results.
838 if (ip
->flags
& HAMMER_INODE_RO
) {
839 hammer_time_to_timespec(ip
->ino_data
.ctime
, &vap
->va_atime
);
840 hammer_time_to_timespec(ip
->ino_data
.ctime
, &vap
->va_mtime
);
842 hammer_time_to_timespec(ip
->ino_data
.atime
, &vap
->va_atime
);
843 hammer_time_to_timespec(ip
->ino_data
.mtime
, &vap
->va_mtime
);
845 hammer_time_to_timespec(ip
->ino_data
.ctime
, &vap
->va_ctime
);
846 vap
->va_flags
= ip
->ino_data
.uflags
;
847 vap
->va_gen
= 1; /* hammer inums are unique for all time */
848 vap
->va_blocksize
= HAMMER_BUFSIZE
;
849 if (ip
->ino_data
.size
>= HAMMER_XDEMARC
) {
850 vap
->va_bytes
= (ip
->ino_data
.size
+ HAMMER_XBUFMASK64
) &
852 } else if (ip
->ino_data
.size
> HAMMER_BUFSIZE
/ 2) {
853 vap
->va_bytes
= (ip
->ino_data
.size
+ HAMMER_BUFMASK64
) &
856 vap
->va_bytes
= (ip
->ino_data
.size
+ 15) & ~15;
859 vap
->va_type
= hammer_get_vnode_type(ip
->ino_data
.obj_type
);
860 vap
->va_filerev
= 0; /* XXX */
861 /* mtime uniquely identifies any adjustments made to the file XXX */
862 vap
->va_fsmid
= ip
->ino_data
.mtime
;
863 vap
->va_uid_uuid
= ip
->ino_data
.uid
;
864 vap
->va_gid_uuid
= ip
->ino_data
.gid
;
865 vap
->va_fsid_uuid
= ip
->hmp
->fsid
;
866 vap
->va_vaflags
= VA_UID_UUID_VALID
| VA_GID_UUID_VALID
|
869 switch (ip
->ino_data
.obj_type
) {
870 case HAMMER_OBJTYPE_CDEV
:
871 case HAMMER_OBJTYPE_BDEV
:
872 vap
->va_rmajor
= ip
->ino_data
.rmajor
;
873 vap
->va_rminor
= ip
->ino_data
.rminor
;
878 hammer_unlock(&ip
->lock
);
883 * hammer_vop_nresolve { nch, dvp, cred }
885 * Locate the requested directory entry.
889 hammer_vop_nresolve(struct vop_nresolve_args
*ap
)
891 struct hammer_transaction trans
;
892 struct namecache
*ncp
;
896 struct hammer_cursor cursor
;
905 u_int32_t localization
;
906 u_int32_t max_iterations
;
909 * Misc initialization, plus handle as-of name extensions. Look for
910 * the '@@' extension. Note that as-of files and directories cannot
913 dip
= VTOI(ap
->a_dvp
);
914 ncp
= ap
->a_nch
->ncp
;
915 asof
= dip
->obj_asof
;
916 localization
= dip
->obj_localization
; /* for code consistency */
918 flags
= dip
->flags
& HAMMER_INODE_RO
;
921 hammer_simple_transaction(&trans
, dip
->hmp
);
922 ++hammer_stats_file_iopsr
;
924 for (i
= 0; i
< nlen
; ++i
) {
925 if (ncp
->nc_name
[i
] == '@' && ncp
->nc_name
[i
+1] == '@') {
926 error
= hammer_str_to_tid(ncp
->nc_name
+ i
+ 2,
927 &ispfs
, &asof
, &localization
);
932 if (asof
!= HAMMER_MAX_TID
)
933 flags
|= HAMMER_INODE_RO
;
940 * If this is a PFS softlink we dive into the PFS
942 if (ispfs
&& nlen
== 0) {
943 ip
= hammer_get_inode(&trans
, dip
, HAMMER_OBJID_ROOT
,
947 error
= hammer_get_vnode(ip
, &vp
);
948 hammer_rel_inode(ip
, 0);
954 cache_setvp(ap
->a_nch
, vp
);
961 * If there is no path component the time extension is relative to dip.
962 * e.g. "fubar/@@<snapshot>"
964 * "." is handled by the kernel, but ".@@<snapshot>" is not.
965 * e.g. "fubar/.@@<snapshot>"
967 * ".." is handled by the kernel. We do not currently handle
970 if (nlen
== 0 || (nlen
== 1 && ncp
->nc_name
[0] == '.')) {
971 ip
= hammer_get_inode(&trans
, dip
, dip
->obj_id
,
972 asof
, dip
->obj_localization
,
975 error
= hammer_get_vnode(ip
, &vp
);
976 hammer_rel_inode(ip
, 0);
982 cache_setvp(ap
->a_nch
, vp
);
989 * Calculate the namekey and setup the key range for the scan. This
990 * works kinda like a chained hash table where the lower 32 bits
991 * of the namekey synthesize the chain.
993 * The key range is inclusive of both key_beg and key_end.
995 namekey
= hammer_directory_namekey(dip
, ncp
->nc_name
, nlen
,
998 error
= hammer_init_cursor(&trans
, &cursor
, &dip
->cache
[1], dip
);
999 cursor
.key_beg
.localization
= dip
->obj_localization
+
1000 hammer_dir_localization(dip
);
1001 cursor
.key_beg
.obj_id
= dip
->obj_id
;
1002 cursor
.key_beg
.key
= namekey
;
1003 cursor
.key_beg
.create_tid
= 0;
1004 cursor
.key_beg
.delete_tid
= 0;
1005 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DIRENTRY
;
1006 cursor
.key_beg
.obj_type
= 0;
1008 cursor
.key_end
= cursor
.key_beg
;
1009 cursor
.key_end
.key
+= max_iterations
;
1011 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
| HAMMER_CURSOR_ASOF
;
1014 * Scan all matching records (the chain), locate the one matching
1015 * the requested path component.
1017 * The hammer_ip_*() functions merge in-memory records with on-disk
1018 * records for the purposes of the search.
1021 localization
= HAMMER_DEF_LOCALIZATION
;
1024 error
= hammer_ip_first(&cursor
);
1025 while (error
== 0) {
1026 error
= hammer_ip_resolve_data(&cursor
);
1029 if (nlen
== cursor
.leaf
->data_len
- HAMMER_ENTRY_NAME_OFF
&&
1030 bcmp(ncp
->nc_name
, cursor
.data
->entry
.name
, nlen
) == 0) {
1031 obj_id
= cursor
.data
->entry
.obj_id
;
1032 localization
= cursor
.data
->entry
.localization
;
1035 error
= hammer_ip_next(&cursor
);
1038 hammer_done_cursor(&cursor
);
1041 * Lookup the obj_id. This should always succeed. If it does not
1042 * the filesystem may be damaged and we return a dummy inode.
1045 ip
= hammer_get_inode(&trans
, dip
, obj_id
,
1048 if (error
== ENOENT
) {
1049 kprintf("HAMMER: WARNING: Missing "
1050 "inode for dirent \"%s\"\n"
1051 "\tobj_id = %016llx, asof=%016llx, lo=%08x\n",
1053 (long long)obj_id
, (long long)asof
,
1056 ip
= hammer_get_dummy_inode(&trans
, dip
, obj_id
,
1061 error
= hammer_get_vnode(ip
, &vp
);
1062 hammer_rel_inode(ip
, 0);
1068 cache_setvp(ap
->a_nch
, vp
);
1071 } else if (error
== ENOENT
) {
1072 cache_setvp(ap
->a_nch
, NULL
);
1075 hammer_done_transaction(&trans
);
1080 * hammer_vop_nlookupdotdot { dvp, vpp, cred }
1082 * Locate the parent directory of a directory vnode.
1084 * dvp is referenced but not locked. *vpp must be returned referenced and
1085 * locked. A parent_obj_id of 0 does not necessarily indicate that we are
1086 * at the root, instead it could indicate that the directory we were in was
1089 * NOTE: as-of sequences are not linked into the directory structure. If
1090 * we are at the root with a different asof then the mount point, reload
1091 * the same directory with the mount point's asof. I'm not sure what this
1092 * will do to NFS. We encode ASOF stamps in NFS file handles so it might not
1093 * get confused, but it hasn't been tested.
1097 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args
*ap
)
1099 struct hammer_transaction trans
;
1100 struct hammer_inode
*dip
;
1101 struct hammer_inode
*ip
;
1102 int64_t parent_obj_id
;
1103 u_int32_t parent_obj_localization
;
1107 dip
= VTOI(ap
->a_dvp
);
1108 asof
= dip
->obj_asof
;
1111 * Whos are parent? This could be the root of a pseudo-filesystem
1112 * whos parent is in another localization domain.
1114 parent_obj_id
= dip
->ino_data
.parent_obj_id
;
1115 if (dip
->obj_id
== HAMMER_OBJID_ROOT
)
1116 parent_obj_localization
= dip
->ino_data
.ext
.obj
.parent_obj_localization
;
1118 parent_obj_localization
= dip
->obj_localization
;
1120 if (parent_obj_id
== 0) {
1121 if (dip
->obj_id
== HAMMER_OBJID_ROOT
&&
1122 asof
!= dip
->hmp
->asof
) {
1123 parent_obj_id
= dip
->obj_id
;
1124 asof
= dip
->hmp
->asof
;
1125 *ap
->a_fakename
= kmalloc(19, M_TEMP
, M_WAITOK
);
1126 ksnprintf(*ap
->a_fakename
, 19, "0x%016llx",
1127 (long long)dip
->obj_asof
);
1134 hammer_simple_transaction(&trans
, dip
->hmp
);
1135 ++hammer_stats_file_iopsr
;
1137 ip
= hammer_get_inode(&trans
, dip
, parent_obj_id
,
1138 asof
, parent_obj_localization
,
1139 dip
->flags
, &error
);
1141 error
= hammer_get_vnode(ip
, ap
->a_vpp
);
1142 hammer_rel_inode(ip
, 0);
1146 hammer_done_transaction(&trans
);
1151 * hammer_vop_nlink { nch, dvp, vp, cred }
1155 hammer_vop_nlink(struct vop_nlink_args
*ap
)
1157 struct hammer_transaction trans
;
1158 struct hammer_inode
*dip
;
1159 struct hammer_inode
*ip
;
1160 struct nchandle
*nch
;
1163 if (ap
->a_dvp
->v_mount
!= ap
->a_vp
->v_mount
)
1167 dip
= VTOI(ap
->a_dvp
);
1168 ip
= VTOI(ap
->a_vp
);
1170 if (dip
->obj_localization
!= ip
->obj_localization
)
1173 if (dip
->flags
& HAMMER_INODE_RO
)
1175 if (ip
->flags
& HAMMER_INODE_RO
)
1177 if ((error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
1181 * Create a transaction to cover the operations we perform.
1183 hammer_start_transaction(&trans
, dip
->hmp
);
1184 ++hammer_stats_file_iopsw
;
1187 * Add the filesystem object to the directory. Note that neither
1188 * dip nor ip are referenced or locked, but their vnodes are
1189 * referenced. This function will bump the inode's link count.
1191 error
= hammer_ip_add_directory(&trans
, dip
,
1192 nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
1199 cache_setunresolved(nch
);
1200 cache_setvp(nch
, ap
->a_vp
);
1202 hammer_done_transaction(&trans
);
1203 hammer_knote(ap
->a_vp
, NOTE_LINK
);
1204 hammer_knote(ap
->a_dvp
, NOTE_WRITE
);
1209 * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
1211 * The operating system has already ensured that the directory entry
1212 * does not exist and done all appropriate namespace locking.
1216 hammer_vop_nmkdir(struct vop_nmkdir_args
*ap
)
1218 struct hammer_transaction trans
;
1219 struct hammer_inode
*dip
;
1220 struct hammer_inode
*nip
;
1221 struct nchandle
*nch
;
1225 dip
= VTOI(ap
->a_dvp
);
1227 if (dip
->flags
& HAMMER_INODE_RO
)
1229 if ((error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
1233 * Create a transaction to cover the operations we perform.
1235 hammer_start_transaction(&trans
, dip
->hmp
);
1236 ++hammer_stats_file_iopsw
;
1239 * Create a new filesystem object of the requested type. The
1240 * returned inode will be referenced but not locked.
1242 error
= hammer_create_inode(&trans
, ap
->a_vap
, ap
->a_cred
,
1243 dip
, nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
1246 hkprintf("hammer_mkdir error %d\n", error
);
1247 hammer_done_transaction(&trans
);
1252 * Add the new filesystem object to the directory. This will also
1253 * bump the inode's link count.
1255 error
= hammer_ip_add_directory(&trans
, dip
,
1256 nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
1259 hkprintf("hammer_mkdir (add) error %d\n", error
);
1265 hammer_rel_inode(nip
, 0);
1268 error
= hammer_get_vnode(nip
, ap
->a_vpp
);
1269 hammer_rel_inode(nip
, 0);
1271 cache_setunresolved(ap
->a_nch
);
1272 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1275 hammer_done_transaction(&trans
);
1277 hammer_knote(ap
->a_dvp
, NOTE_WRITE
| NOTE_LINK
);
1282 * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
1284 * The operating system has already ensured that the directory entry
1285 * does not exist and done all appropriate namespace locking.
1289 hammer_vop_nmknod(struct vop_nmknod_args
*ap
)
1291 struct hammer_transaction trans
;
1292 struct hammer_inode
*dip
;
1293 struct hammer_inode
*nip
;
1294 struct nchandle
*nch
;
1298 dip
= VTOI(ap
->a_dvp
);
1300 if (dip
->flags
& HAMMER_INODE_RO
)
1302 if ((error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
1306 * Create a transaction to cover the operations we perform.
1308 hammer_start_transaction(&trans
, dip
->hmp
);
1309 ++hammer_stats_file_iopsw
;
1312 * Create a new filesystem object of the requested type. The
1313 * returned inode will be referenced but not locked.
1315 * If mknod specifies a directory a pseudo-fs is created.
1317 error
= hammer_create_inode(&trans
, ap
->a_vap
, ap
->a_cred
,
1318 dip
, nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
1321 hammer_done_transaction(&trans
);
1327 * Add the new filesystem object to the directory. This will also
1328 * bump the inode's link count.
1330 error
= hammer_ip_add_directory(&trans
, dip
,
1331 nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
1338 hammer_rel_inode(nip
, 0);
1341 error
= hammer_get_vnode(nip
, ap
->a_vpp
);
1342 hammer_rel_inode(nip
, 0);
1344 cache_setunresolved(ap
->a_nch
);
1345 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1348 hammer_done_transaction(&trans
);
1350 hammer_knote(ap
->a_dvp
, NOTE_WRITE
);
1355 * hammer_vop_open { vp, mode, cred, fp }
1359 hammer_vop_open(struct vop_open_args
*ap
)
1363 ++hammer_stats_file_iopsr
;
1364 ip
= VTOI(ap
->a_vp
);
1366 if ((ap
->a_mode
& FWRITE
) && (ip
->flags
& HAMMER_INODE_RO
))
1368 return(vop_stdopen(ap
));
1372 * hammer_vop_print { vp }
1376 hammer_vop_print(struct vop_print_args
*ap
)
1382 * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
1386 hammer_vop_readdir(struct vop_readdir_args
*ap
)
1388 struct hammer_transaction trans
;
1389 struct hammer_cursor cursor
;
1390 struct hammer_inode
*ip
;
1392 hammer_base_elm_t base
;
1401 ++hammer_stats_file_iopsr
;
1402 ip
= VTOI(ap
->a_vp
);
1404 saveoff
= uio
->uio_offset
;
1406 if (ap
->a_ncookies
) {
1407 ncookies
= uio
->uio_resid
/ 16 + 1;
1408 if (ncookies
> 1024)
1410 cookies
= kmalloc(ncookies
* sizeof(off_t
), M_TEMP
, M_WAITOK
);
1418 hammer_simple_transaction(&trans
, ip
->hmp
);
1421 * Handle artificial entries
1423 * It should be noted that the minimum value for a directory
1424 * hash key on-media is 0x0000000100000000, so we can use anything
1425 * less then that to represent our 'special' key space.
1429 r
= vop_write_dirent(&error
, uio
, ip
->obj_id
, DT_DIR
, 1, ".");
1433 cookies
[cookie_index
] = saveoff
;
1436 if (cookie_index
== ncookies
)
1440 if (ip
->ino_data
.parent_obj_id
) {
1441 r
= vop_write_dirent(&error
, uio
,
1442 ip
->ino_data
.parent_obj_id
,
1445 r
= vop_write_dirent(&error
, uio
,
1446 ip
->obj_id
, DT_DIR
, 2, "..");
1451 cookies
[cookie_index
] = saveoff
;
1454 if (cookie_index
== ncookies
)
1459 * Key range (begin and end inclusive) to scan. Directory keys
1460 * directly translate to a 64 bit 'seek' position.
1462 hammer_init_cursor(&trans
, &cursor
, &ip
->cache
[1], ip
);
1463 cursor
.key_beg
.localization
= ip
->obj_localization
+
1464 hammer_dir_localization(ip
);
1465 cursor
.key_beg
.obj_id
= ip
->obj_id
;
1466 cursor
.key_beg
.create_tid
= 0;
1467 cursor
.key_beg
.delete_tid
= 0;
1468 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DIRENTRY
;
1469 cursor
.key_beg
.obj_type
= 0;
1470 cursor
.key_beg
.key
= saveoff
;
1472 cursor
.key_end
= cursor
.key_beg
;
1473 cursor
.key_end
.key
= HAMMER_MAX_KEY
;
1474 cursor
.asof
= ip
->obj_asof
;
1475 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
| HAMMER_CURSOR_ASOF
;
1477 error
= hammer_ip_first(&cursor
);
1479 while (error
== 0) {
1480 error
= hammer_ip_resolve_data(&cursor
);
1483 base
= &cursor
.leaf
->base
;
1484 saveoff
= base
->key
;
1485 KKASSERT(cursor
.leaf
->data_len
> HAMMER_ENTRY_NAME_OFF
);
1487 if (base
->obj_id
!= ip
->obj_id
)
1488 panic("readdir: bad record at %p", cursor
.node
);
1491 * Convert pseudo-filesystems into softlinks
1493 dtype
= hammer_get_dtype(cursor
.leaf
->base
.obj_type
);
1494 r
= vop_write_dirent(
1495 &error
, uio
, cursor
.data
->entry
.obj_id
,
1497 cursor
.leaf
->data_len
- HAMMER_ENTRY_NAME_OFF
,
1498 (void *)cursor
.data
->entry
.name
);
1503 cookies
[cookie_index
] = base
->key
;
1505 if (cookie_index
== ncookies
)
1507 error
= hammer_ip_next(&cursor
);
1509 hammer_done_cursor(&cursor
);
1512 hammer_done_transaction(&trans
);
1515 *ap
->a_eofflag
= (error
== ENOENT
);
1516 uio
->uio_offset
= saveoff
;
1517 if (error
&& cookie_index
== 0) {
1518 if (error
== ENOENT
)
1521 kfree(cookies
, M_TEMP
);
1522 *ap
->a_ncookies
= 0;
1523 *ap
->a_cookies
= NULL
;
1526 if (error
== ENOENT
)
1529 *ap
->a_ncookies
= cookie_index
;
1530 *ap
->a_cookies
= cookies
;
1537 * hammer_vop_readlink { vp, uio, cred }
1541 hammer_vop_readlink(struct vop_readlink_args
*ap
)
1543 struct hammer_transaction trans
;
1544 struct hammer_cursor cursor
;
1545 struct hammer_inode
*ip
;
1547 u_int32_t localization
;
1548 hammer_pseudofs_inmem_t pfsm
;
1551 ip
= VTOI(ap
->a_vp
);
1554 * Shortcut if the symlink data was stuffed into ino_data.
1556 * Also expand special "@@PFS%05d" softlinks (expansion only
1557 * occurs for non-historical (current) accesses made from the
1558 * primary filesystem).
1560 if (ip
->ino_data
.size
<= HAMMER_INODE_BASESYMLEN
) {
1564 ptr
= ip
->ino_data
.ext
.symlink
;
1565 bytes
= (int)ip
->ino_data
.size
;
1567 ip
->obj_asof
== HAMMER_MAX_TID
&&
1568 ip
->obj_localization
== 0 &&
1569 strncmp(ptr
, "@@PFS", 5) == 0) {
1570 hammer_simple_transaction(&trans
, ip
->hmp
);
1571 bcopy(ptr
+ 5, buf
, 5);
1573 localization
= strtoul(buf
, NULL
, 10) << 16;
1574 pfsm
= hammer_load_pseudofs(&trans
, localization
,
1577 if (pfsm
->pfsd
.mirror_flags
&
1578 HAMMER_PFSD_SLAVE
) {
1579 /* vap->va_size == 26 */
1580 ksnprintf(buf
, sizeof(buf
),
1582 (long long)pfsm
->pfsd
.sync_end_tid
,
1583 localization
>> 16);
1585 /* vap->va_size == 10 */
1586 ksnprintf(buf
, sizeof(buf
),
1588 localization
>> 16);
1590 ksnprintf(buf
, sizeof(buf
),
1592 (long long)HAMMER_MAX_TID
,
1593 localization
>> 16);
1597 bytes
= strlen(buf
);
1600 hammer_rel_pseudofs(trans
.hmp
, pfsm
);
1601 hammer_done_transaction(&trans
);
1603 error
= uiomove(ptr
, bytes
, ap
->a_uio
);
1610 hammer_simple_transaction(&trans
, ip
->hmp
);
1611 ++hammer_stats_file_iopsr
;
1612 hammer_init_cursor(&trans
, &cursor
, &ip
->cache
[1], ip
);
1615 * Key range (begin and end inclusive) to scan. Directory keys
1616 * directly translate to a 64 bit 'seek' position.
1618 cursor
.key_beg
.localization
= ip
->obj_localization
+
1619 HAMMER_LOCALIZE_MISC
;
1620 cursor
.key_beg
.obj_id
= ip
->obj_id
;
1621 cursor
.key_beg
.create_tid
= 0;
1622 cursor
.key_beg
.delete_tid
= 0;
1623 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_FIX
;
1624 cursor
.key_beg
.obj_type
= 0;
1625 cursor
.key_beg
.key
= HAMMER_FIXKEY_SYMLINK
;
1626 cursor
.asof
= ip
->obj_asof
;
1627 cursor
.flags
|= HAMMER_CURSOR_ASOF
;
1629 error
= hammer_ip_lookup(&cursor
);
1631 error
= hammer_ip_resolve_data(&cursor
);
1633 KKASSERT(cursor
.leaf
->data_len
>=
1634 HAMMER_SYMLINK_NAME_OFF
);
1635 error
= uiomove(cursor
.data
->symlink
.name
,
1636 cursor
.leaf
->data_len
-
1637 HAMMER_SYMLINK_NAME_OFF
,
1641 hammer_done_cursor(&cursor
);
1642 hammer_done_transaction(&trans
);
1647 * hammer_vop_nremove { nch, dvp, cred }
1651 hammer_vop_nremove(struct vop_nremove_args
*ap
)
1653 struct hammer_transaction trans
;
1654 struct hammer_inode
*dip
;
1657 dip
= VTOI(ap
->a_dvp
);
1659 if (hammer_nohistory(dip
) == 0 &&
1660 (error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_REMOVE
)) != 0) {
1664 hammer_start_transaction(&trans
, dip
->hmp
);
1665 ++hammer_stats_file_iopsw
;
1666 error
= hammer_dounlink(&trans
, ap
->a_nch
, ap
->a_dvp
, ap
->a_cred
, 0, 0);
1667 hammer_done_transaction(&trans
);
1669 hammer_knote(ap
->a_dvp
, NOTE_WRITE
);
1674 * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1678 hammer_vop_nrename(struct vop_nrename_args
*ap
)
1680 struct hammer_transaction trans
;
1681 struct namecache
*fncp
;
1682 struct namecache
*tncp
;
1683 struct hammer_inode
*fdip
;
1684 struct hammer_inode
*tdip
;
1685 struct hammer_inode
*ip
;
1686 struct hammer_cursor cursor
;
1688 u_int32_t max_iterations
;
1691 if (ap
->a_fdvp
->v_mount
!= ap
->a_tdvp
->v_mount
)
1693 if (ap
->a_fdvp
->v_mount
!= ap
->a_fnch
->ncp
->nc_vp
->v_mount
)
1696 fdip
= VTOI(ap
->a_fdvp
);
1697 tdip
= VTOI(ap
->a_tdvp
);
1698 fncp
= ap
->a_fnch
->ncp
;
1699 tncp
= ap
->a_tnch
->ncp
;
1700 ip
= VTOI(fncp
->nc_vp
);
1701 KKASSERT(ip
!= NULL
);
1703 if (fdip
->obj_localization
!= tdip
->obj_localization
)
1705 if (fdip
->obj_localization
!= ip
->obj_localization
)
1708 if (fdip
->flags
& HAMMER_INODE_RO
)
1710 if (tdip
->flags
& HAMMER_INODE_RO
)
1712 if (ip
->flags
& HAMMER_INODE_RO
)
1714 if ((error
= hammer_checkspace(fdip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
1717 hammer_start_transaction(&trans
, fdip
->hmp
);
1718 ++hammer_stats_file_iopsw
;
1721 * Remove tncp from the target directory and then link ip as
1722 * tncp. XXX pass trans to dounlink
1724 * Force the inode sync-time to match the transaction so it is
1725 * in-sync with the creation of the target directory entry.
1727 error
= hammer_dounlink(&trans
, ap
->a_tnch
, ap
->a_tdvp
,
1729 if (error
== 0 || error
== ENOENT
) {
1730 error
= hammer_ip_add_directory(&trans
, tdip
,
1731 tncp
->nc_name
, tncp
->nc_nlen
,
1734 ip
->ino_data
.parent_obj_id
= tdip
->obj_id
;
1735 ip
->ino_data
.ctime
= trans
.time
;
1736 hammer_modify_inode(ip
, HAMMER_INODE_DDIRTY
);
1740 goto failed
; /* XXX */
1743 * Locate the record in the originating directory and remove it.
1745 * Calculate the namekey and setup the key range for the scan. This
1746 * works kinda like a chained hash table where the lower 32 bits
1747 * of the namekey synthesize the chain.
1749 * The key range is inclusive of both key_beg and key_end.
1751 namekey
= hammer_directory_namekey(fdip
, fncp
->nc_name
, fncp
->nc_nlen
,
1754 hammer_init_cursor(&trans
, &cursor
, &fdip
->cache
[1], fdip
);
1755 cursor
.key_beg
.localization
= fdip
->obj_localization
+
1756 hammer_dir_localization(fdip
);
1757 cursor
.key_beg
.obj_id
= fdip
->obj_id
;
1758 cursor
.key_beg
.key
= namekey
;
1759 cursor
.key_beg
.create_tid
= 0;
1760 cursor
.key_beg
.delete_tid
= 0;
1761 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DIRENTRY
;
1762 cursor
.key_beg
.obj_type
= 0;
1764 cursor
.key_end
= cursor
.key_beg
;
1765 cursor
.key_end
.key
+= max_iterations
;
1766 cursor
.asof
= fdip
->obj_asof
;
1767 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
| HAMMER_CURSOR_ASOF
;
1770 * Scan all matching records (the chain), locate the one matching
1771 * the requested path component.
1773 * The hammer_ip_*() functions merge in-memory records with on-disk
1774 * records for the purposes of the search.
1776 error
= hammer_ip_first(&cursor
);
1777 while (error
== 0) {
1778 if (hammer_ip_resolve_data(&cursor
) != 0)
1780 nlen
= cursor
.leaf
->data_len
- HAMMER_ENTRY_NAME_OFF
;
1782 if (fncp
->nc_nlen
== nlen
&&
1783 bcmp(fncp
->nc_name
, cursor
.data
->entry
.name
, nlen
) == 0) {
1786 error
= hammer_ip_next(&cursor
);
1790 * If all is ok we have to get the inode so we can adjust nlinks.
1792 * WARNING: hammer_ip_del_directory() may have to terminate the
1793 * cursor to avoid a recursion. It's ok to call hammer_done_cursor()
1797 error
= hammer_ip_del_directory(&trans
, &cursor
, fdip
, ip
);
1800 * XXX A deadlock here will break rename's atomicy for the purposes
1801 * of crash recovery.
1803 if (error
== EDEADLK
) {
1804 hammer_done_cursor(&cursor
);
1809 * Cleanup and tell the kernel that the rename succeeded.
1811 hammer_done_cursor(&cursor
);
1813 cache_rename(ap
->a_fnch
, ap
->a_tnch
);
1814 hammer_knote(ap
->a_fdvp
, NOTE_WRITE
);
1815 hammer_knote(ap
->a_tdvp
, NOTE_WRITE
);
1817 hammer_knote(ip
->vp
, NOTE_RENAME
);
1821 hammer_done_transaction(&trans
);
1826 * hammer_vop_nrmdir { nch, dvp, cred }
1830 hammer_vop_nrmdir(struct vop_nrmdir_args
*ap
)
1832 struct hammer_transaction trans
;
1833 struct hammer_inode
*dip
;
1836 dip
= VTOI(ap
->a_dvp
);
1838 if (hammer_nohistory(dip
) == 0 &&
1839 (error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_REMOVE
)) != 0) {
1843 hammer_start_transaction(&trans
, dip
->hmp
);
1844 ++hammer_stats_file_iopsw
;
1845 error
= hammer_dounlink(&trans
, ap
->a_nch
, ap
->a_dvp
, ap
->a_cred
, 0, 1);
1846 hammer_done_transaction(&trans
);
1848 hammer_knote(ap
->a_dvp
, NOTE_WRITE
| NOTE_LINK
);
1853 * hammer_vop_markatime { vp, cred }
1857 hammer_vop_markatime(struct vop_markatime_args
*ap
)
1859 struct hammer_transaction trans
;
1860 struct hammer_inode
*ip
;
1862 ip
= VTOI(ap
->a_vp
);
1863 if (ap
->a_vp
->v_mount
->mnt_flag
& MNT_RDONLY
)
1865 if (ip
->flags
& HAMMER_INODE_RO
)
1867 if (ip
->hmp
->mp
->mnt_flag
& MNT_NOATIME
)
1869 hammer_start_transaction(&trans
, ip
->hmp
);
1870 ++hammer_stats_file_iopsw
;
1872 ip
->ino_data
.atime
= trans
.time
;
1873 hammer_modify_inode(ip
, HAMMER_INODE_ATIME
);
1874 hammer_done_transaction(&trans
);
1875 hammer_knote(ap
->a_vp
, NOTE_ATTRIB
);
1880 * hammer_vop_setattr { vp, vap, cred }
1884 hammer_vop_setattr(struct vop_setattr_args
*ap
)
1886 struct hammer_transaction trans
;
1888 struct hammer_inode
*ip
;
1894 int64_t aligned_size
;
1898 ip
= ap
->a_vp
->v_data
;
1902 if (ap
->a_vp
->v_mount
->mnt_flag
& MNT_RDONLY
)
1904 if (ip
->flags
& HAMMER_INODE_RO
)
1906 if (hammer_nohistory(ip
) == 0 &&
1907 (error
= hammer_checkspace(ip
->hmp
, HAMMER_CHKSPC_REMOVE
)) != 0) {
1911 hammer_start_transaction(&trans
, ip
->hmp
);
1912 ++hammer_stats_file_iopsw
;
1915 if (vap
->va_flags
!= VNOVAL
) {
1916 flags
= ip
->ino_data
.uflags
;
1917 error
= vop_helper_setattr_flags(&flags
, vap
->va_flags
,
1918 hammer_to_unix_xid(&ip
->ino_data
.uid
),
1921 if (ip
->ino_data
.uflags
!= flags
) {
1922 ip
->ino_data
.uflags
= flags
;
1923 ip
->ino_data
.ctime
= trans
.time
;
1924 modflags
|= HAMMER_INODE_DDIRTY
;
1925 kflags
|= NOTE_ATTRIB
;
1927 if (ip
->ino_data
.uflags
& (IMMUTABLE
| APPEND
)) {
1934 if (ip
->ino_data
.uflags
& (IMMUTABLE
| APPEND
)) {
1938 if (vap
->va_uid
!= (uid_t
)VNOVAL
|| vap
->va_gid
!= (gid_t
)VNOVAL
) {
1939 mode_t cur_mode
= ip
->ino_data
.mode
;
1940 uid_t cur_uid
= hammer_to_unix_xid(&ip
->ino_data
.uid
);
1941 gid_t cur_gid
= hammer_to_unix_xid(&ip
->ino_data
.gid
);
1945 error
= vop_helper_chown(ap
->a_vp
, vap
->va_uid
, vap
->va_gid
,
1947 &cur_uid
, &cur_gid
, &cur_mode
);
1949 hammer_guid_to_uuid(&uuid_uid
, cur_uid
);
1950 hammer_guid_to_uuid(&uuid_gid
, cur_gid
);
1951 if (bcmp(&uuid_uid
, &ip
->ino_data
.uid
,
1952 sizeof(uuid_uid
)) ||
1953 bcmp(&uuid_gid
, &ip
->ino_data
.gid
,
1954 sizeof(uuid_gid
)) ||
1955 ip
->ino_data
.mode
!= cur_mode
1957 ip
->ino_data
.uid
= uuid_uid
;
1958 ip
->ino_data
.gid
= uuid_gid
;
1959 ip
->ino_data
.mode
= cur_mode
;
1960 ip
->ino_data
.ctime
= trans
.time
;
1961 modflags
|= HAMMER_INODE_DDIRTY
;
1963 kflags
|= NOTE_ATTRIB
;
1966 while (vap
->va_size
!= VNOVAL
&& ip
->ino_data
.size
!= vap
->va_size
) {
1967 switch(ap
->a_vp
->v_type
) {
1969 if (vap
->va_size
== ip
->ino_data
.size
)
1972 * XXX break atomicy, we can deadlock the backend
1973 * if we do not release the lock. Probably not a
1976 blksize
= hammer_blocksize(vap
->va_size
);
1977 if (vap
->va_size
< ip
->ino_data
.size
) {
1978 vtruncbuf(ap
->a_vp
, vap
->va_size
, blksize
);
1980 kflags
|= NOTE_WRITE
;
1982 vnode_pager_setsize(ap
->a_vp
, vap
->va_size
);
1984 kflags
|= NOTE_WRITE
| NOTE_EXTEND
;
1986 ip
->ino_data
.size
= vap
->va_size
;
1987 ip
->ino_data
.mtime
= trans
.time
;
1988 modflags
|= HAMMER_INODE_MTIME
| HAMMER_INODE_DDIRTY
;
1991 * on-media truncation is cached in the inode until
1992 * the inode is synchronized.
1995 hammer_ip_frontend_trunc(ip
, vap
->va_size
);
1996 #ifdef DEBUG_TRUNCATE
1997 if (HammerTruncIp
== NULL
)
2000 if ((ip
->flags
& HAMMER_INODE_TRUNCATED
) == 0) {
2001 ip
->flags
|= HAMMER_INODE_TRUNCATED
;
2002 ip
->trunc_off
= vap
->va_size
;
2003 #ifdef DEBUG_TRUNCATE
2004 if (ip
== HammerTruncIp
)
2005 kprintf("truncate1 %016llx\n",
2006 (long long)ip
->trunc_off
);
2008 } else if (ip
->trunc_off
> vap
->va_size
) {
2009 ip
->trunc_off
= vap
->va_size
;
2010 #ifdef DEBUG_TRUNCATE
2011 if (ip
== HammerTruncIp
)
2012 kprintf("truncate2 %016llx\n",
2013 (long long)ip
->trunc_off
);
2016 #ifdef DEBUG_TRUNCATE
2017 if (ip
== HammerTruncIp
)
2018 kprintf("truncate3 %016llx (ignored)\n",
2019 (long long)vap
->va_size
);
2025 * If truncating we have to clean out a portion of
2026 * the last block on-disk. We do this in the
2027 * front-end buffer cache.
2029 aligned_size
= (vap
->va_size
+ (blksize
- 1)) &
2030 ~(int64_t)(blksize
- 1);
2031 if (truncating
&& vap
->va_size
< aligned_size
) {
2035 aligned_size
-= blksize
;
2037 offset
= (int)vap
->va_size
& (blksize
- 1);
2038 error
= bread(ap
->a_vp
, aligned_size
,
2040 hammer_ip_frontend_trunc(ip
, aligned_size
);
2042 bzero(bp
->b_data
+ offset
,
2044 /* must de-cache direct-io offset */
2045 bp
->b_bio2
.bio_offset
= NOOFFSET
;
2048 kprintf("ERROR %d\n", error
);
2054 if ((ip
->flags
& HAMMER_INODE_TRUNCATED
) == 0) {
2055 ip
->flags
|= HAMMER_INODE_TRUNCATED
;
2056 ip
->trunc_off
= vap
->va_size
;
2057 } else if (ip
->trunc_off
> vap
->va_size
) {
2058 ip
->trunc_off
= vap
->va_size
;
2060 hammer_ip_frontend_trunc(ip
, vap
->va_size
);
2061 ip
->ino_data
.size
= vap
->va_size
;
2062 ip
->ino_data
.mtime
= trans
.time
;
2063 modflags
|= HAMMER_INODE_MTIME
| HAMMER_INODE_DDIRTY
;
2064 kflags
|= NOTE_ATTRIB
;
2072 if (vap
->va_atime
.tv_sec
!= VNOVAL
) {
2073 ip
->ino_data
.atime
= hammer_timespec_to_time(&vap
->va_atime
);
2074 modflags
|= HAMMER_INODE_ATIME
;
2075 kflags
|= NOTE_ATTRIB
;
2077 if (vap
->va_mtime
.tv_sec
!= VNOVAL
) {
2078 ip
->ino_data
.mtime
= hammer_timespec_to_time(&vap
->va_mtime
);
2079 modflags
|= HAMMER_INODE_MTIME
;
2080 kflags
|= NOTE_ATTRIB
;
2082 if (vap
->va_mode
!= (mode_t
)VNOVAL
) {
2083 mode_t cur_mode
= ip
->ino_data
.mode
;
2084 uid_t cur_uid
= hammer_to_unix_xid(&ip
->ino_data
.uid
);
2085 gid_t cur_gid
= hammer_to_unix_xid(&ip
->ino_data
.gid
);
2087 error
= vop_helper_chmod(ap
->a_vp
, vap
->va_mode
, ap
->a_cred
,
2088 cur_uid
, cur_gid
, &cur_mode
);
2089 if (error
== 0 && ip
->ino_data
.mode
!= cur_mode
) {
2090 ip
->ino_data
.mode
= cur_mode
;
2091 ip
->ino_data
.ctime
= trans
.time
;
2092 modflags
|= HAMMER_INODE_DDIRTY
;
2093 kflags
|= NOTE_ATTRIB
;
2098 hammer_modify_inode(ip
, modflags
);
2099 hammer_done_transaction(&trans
);
2100 hammer_knote(ap
->a_vp
, kflags
);
2105 * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
2109 hammer_vop_nsymlink(struct vop_nsymlink_args
*ap
)
2111 struct hammer_transaction trans
;
2112 struct hammer_inode
*dip
;
2113 struct hammer_inode
*nip
;
2114 struct nchandle
*nch
;
2115 hammer_record_t record
;
2119 ap
->a_vap
->va_type
= VLNK
;
2122 dip
= VTOI(ap
->a_dvp
);
2124 if (dip
->flags
& HAMMER_INODE_RO
)
2126 if ((error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0)
2130 * Create a transaction to cover the operations we perform.
2132 hammer_start_transaction(&trans
, dip
->hmp
);
2133 ++hammer_stats_file_iopsw
;
2136 * Create a new filesystem object of the requested type. The
2137 * returned inode will be referenced but not locked.
2140 error
= hammer_create_inode(&trans
, ap
->a_vap
, ap
->a_cred
,
2141 dip
, nch
->ncp
->nc_name
, nch
->ncp
->nc_nlen
,
2144 hammer_done_transaction(&trans
);
2150 * Add a record representing the symlink. symlink stores the link
2151 * as pure data, not a string, and is no \0 terminated.
2154 bytes
= strlen(ap
->a_target
);
2156 if (bytes
<= HAMMER_INODE_BASESYMLEN
) {
2157 bcopy(ap
->a_target
, nip
->ino_data
.ext
.symlink
, bytes
);
2159 record
= hammer_alloc_mem_record(nip
, bytes
);
2160 record
->type
= HAMMER_MEM_RECORD_GENERAL
;
2162 record
->leaf
.base
.localization
= nip
->obj_localization
+
2163 HAMMER_LOCALIZE_MISC
;
2164 record
->leaf
.base
.key
= HAMMER_FIXKEY_SYMLINK
;
2165 record
->leaf
.base
.rec_type
= HAMMER_RECTYPE_FIX
;
2166 record
->leaf
.data_len
= bytes
;
2167 KKASSERT(HAMMER_SYMLINK_NAME_OFF
== 0);
2168 bcopy(ap
->a_target
, record
->data
->symlink
.name
, bytes
);
2169 error
= hammer_ip_add_record(&trans
, record
);
2173 * Set the file size to the length of the link.
2176 nip
->ino_data
.size
= bytes
;
2177 hammer_modify_inode(nip
, HAMMER_INODE_DDIRTY
);
2181 error
= hammer_ip_add_directory(&trans
, dip
, nch
->ncp
->nc_name
,
2182 nch
->ncp
->nc_nlen
, nip
);
2188 hammer_rel_inode(nip
, 0);
2191 error
= hammer_get_vnode(nip
, ap
->a_vpp
);
2192 hammer_rel_inode(nip
, 0);
2194 cache_setunresolved(ap
->a_nch
);
2195 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
2196 hammer_knote(ap
->a_dvp
, NOTE_WRITE
);
2199 hammer_done_transaction(&trans
);
2204 * hammer_vop_nwhiteout { nch, dvp, cred, flags }
2208 hammer_vop_nwhiteout(struct vop_nwhiteout_args
*ap
)
2210 struct hammer_transaction trans
;
2211 struct hammer_inode
*dip
;
2214 dip
= VTOI(ap
->a_dvp
);
2216 if (hammer_nohistory(dip
) == 0 &&
2217 (error
= hammer_checkspace(dip
->hmp
, HAMMER_CHKSPC_CREATE
)) != 0) {
2221 hammer_start_transaction(&trans
, dip
->hmp
);
2222 ++hammer_stats_file_iopsw
;
2223 error
= hammer_dounlink(&trans
, ap
->a_nch
, ap
->a_dvp
,
2224 ap
->a_cred
, ap
->a_flags
, -1);
2225 hammer_done_transaction(&trans
);
2231 * hammer_vop_ioctl { vp, command, data, fflag, cred }
2235 hammer_vop_ioctl(struct vop_ioctl_args
*ap
)
2237 struct hammer_inode
*ip
= ap
->a_vp
->v_data
;
2239 ++hammer_stats_file_iopsr
;
2240 return(hammer_ioctl(ip
, ap
->a_command
, ap
->a_data
,
2241 ap
->a_fflag
, ap
->a_cred
));
2246 hammer_vop_mountctl(struct vop_mountctl_args
*ap
)
2248 static const struct mountctl_opt extraopt
[] = {
2249 { HMNT_NOHISTORY
, "nohistory" },
2250 { HMNT_MASTERID
, "master" },
2254 struct hammer_mount
*hmp
;
2261 mp
= ap
->a_head
.a_ops
->head
.vv_mount
;
2262 KKASSERT(mp
->mnt_data
!= NULL
);
2263 hmp
= (struct hammer_mount
*)mp
->mnt_data
;
2267 case MOUNTCTL_SET_EXPORT
:
2268 if (ap
->a_ctllen
!= sizeof(struct export_args
))
2271 error
= hammer_vfs_export(mp
, ap
->a_op
,
2272 (const struct export_args
*)ap
->a_ctl
);
2274 case MOUNTCTL_MOUNTFLAGS
:
2277 * Call standard mountctl VOP function
2278 * so we get user mount flags.
2280 error
= vop_stdmountctl(ap
);
2284 usedbytes
= *ap
->a_res
;
2286 if (usedbytes
> 0 && usedbytes
< ap
->a_buflen
) {
2287 usedbytes
+= vfs_flagstostr(hmp
->hflags
, extraopt
, ap
->a_buf
,
2288 ap
->a_buflen
- usedbytes
,
2292 *ap
->a_res
+= usedbytes
;
2296 error
= vop_stdmountctl(ap
);
2303 * hammer_vop_strategy { vp, bio }
2305 * Strategy call, used for regular file read & write only. Note that the
2306 * bp may represent a cluster.
2308 * To simplify operation and allow better optimizations in the future,
2309 * this code does not make any assumptions with regards to buffer alignment
2314 hammer_vop_strategy(struct vop_strategy_args
*ap
)
2319 bp
= ap
->a_bio
->bio_buf
;
2323 error
= hammer_vop_strategy_read(ap
);
2326 error
= hammer_vop_strategy_write(ap
);
2329 bp
->b_error
= error
= EINVAL
;
2330 bp
->b_flags
|= B_ERROR
;
2338 * Read from a regular file. Iterate the related records and fill in the
2339 * BIO/BUF. Gaps are zero-filled.
2341 * The support code in hammer_object.c should be used to deal with mixed
2342 * in-memory and on-disk records.
2344 * NOTE: Can be called from the cluster code with an oversized buf.
2350 hammer_vop_strategy_read(struct vop_strategy_args
*ap
)
2352 struct hammer_transaction trans
;
2353 struct hammer_inode
*ip
;
2354 struct hammer_inode
*dip
;
2355 struct hammer_cursor cursor
;
2356 hammer_base_elm_t base
;
2357 hammer_off_t disk_offset
;
2371 ip
= ap
->a_vp
->v_data
;
2374 * The zone-2 disk offset may have been set by the cluster code via
2375 * a BMAP operation, or else should be NOOFFSET.
2377 * Checking the high bits for a match against zone-2 should suffice.
2379 nbio
= push_bio(bio
);
2380 if ((nbio
->bio_offset
& HAMMER_OFF_ZONE_MASK
) ==
2381 HAMMER_ZONE_LARGE_DATA
) {
2382 error
= hammer_io_direct_read(ip
->hmp
, nbio
, NULL
);
2387 * Well, that sucked. Do it the hard way. If all the stars are
2388 * aligned we may still be able to issue a direct-read.
2390 hammer_simple_transaction(&trans
, ip
->hmp
);
2391 hammer_init_cursor(&trans
, &cursor
, &ip
->cache
[1], ip
);
2394 * Key range (begin and end inclusive) to scan. Note that the key's
2395 * stored in the actual records represent BASE+LEN, not BASE. The
2396 * first record containing bio_offset will have a key > bio_offset.
2398 cursor
.key_beg
.localization
= ip
->obj_localization
+
2399 HAMMER_LOCALIZE_MISC
;
2400 cursor
.key_beg
.obj_id
= ip
->obj_id
;
2401 cursor
.key_beg
.create_tid
= 0;
2402 cursor
.key_beg
.delete_tid
= 0;
2403 cursor
.key_beg
.obj_type
= 0;
2404 cursor
.key_beg
.key
= bio
->bio_offset
+ 1;
2405 cursor
.asof
= ip
->obj_asof
;
2406 cursor
.flags
|= HAMMER_CURSOR_ASOF
;
2408 cursor
.key_end
= cursor
.key_beg
;
2409 KKASSERT(ip
->ino_data
.obj_type
== HAMMER_OBJTYPE_REGFILE
);
2411 if (ip
->ino_data
.obj_type
== HAMMER_OBJTYPE_DBFILE
) {
2412 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DB
;
2413 cursor
.key_end
.rec_type
= HAMMER_RECTYPE_DB
;
2414 cursor
.key_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
2418 ran_end
= bio
->bio_offset
+ bp
->b_bufsize
;
2419 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DATA
;
2420 cursor
.key_end
.rec_type
= HAMMER_RECTYPE_DATA
;
2421 tmp64
= ran_end
+ MAXPHYS
+ 1; /* work-around GCC-4 bug */
2422 if (tmp64
< ran_end
)
2423 cursor
.key_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
2425 cursor
.key_end
.key
= ran_end
+ MAXPHYS
+ 1;
2427 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
;
2429 error
= hammer_ip_first(&cursor
);
2432 while (error
== 0) {
2434 * Get the base file offset of the record. The key for
2435 * data records is (base + bytes) rather then (base).
2437 base
= &cursor
.leaf
->base
;
2438 rec_offset
= base
->key
- cursor
.leaf
->data_len
;
2441 * Calculate the gap, if any, and zero-fill it.
2443 * n is the offset of the start of the record verses our
2444 * current seek offset in the bio.
2446 n
= (int)(rec_offset
- (bio
->bio_offset
+ boff
));
2448 if (n
> bp
->b_bufsize
- boff
)
2449 n
= bp
->b_bufsize
- boff
;
2450 bzero((char *)bp
->b_data
+ boff
, n
);
2456 * Calculate the data offset in the record and the number
2457 * of bytes we can copy.
2459 * There are two degenerate cases. First, boff may already
2460 * be at bp->b_bufsize. Secondly, the data offset within
2461 * the record may exceed the record's size.
2465 n
= cursor
.leaf
->data_len
- roff
;
2467 kprintf("strategy_read: bad n=%d roff=%d\n", n
, roff
);
2469 } else if (n
> bp
->b_bufsize
- boff
) {
2470 n
= bp
->b_bufsize
- boff
;
2474 * Deal with cached truncations. This cool bit of code
2475 * allows truncate()/ftruncate() to avoid having to sync
2478 * If the frontend is truncated then all backend records are
2479 * subject to the frontend's truncation.
2481 * If the backend is truncated then backend records on-disk
2482 * (but not in-memory) are subject to the backend's
2483 * truncation. In-memory records owned by the backend
2484 * represent data written after the truncation point on the
2485 * backend and must not be truncated.
2487 * Truncate operations deal with frontend buffer cache
2488 * buffers and frontend-owned in-memory records synchronously.
2490 if (ip
->flags
& HAMMER_INODE_TRUNCATED
) {
2491 if (hammer_cursor_ondisk(&cursor
) ||
2492 cursor
.iprec
->flush_state
== HAMMER_FST_FLUSH
) {
2493 if (ip
->trunc_off
<= rec_offset
)
2495 else if (ip
->trunc_off
< rec_offset
+ n
)
2496 n
= (int)(ip
->trunc_off
- rec_offset
);
2499 if (ip
->sync_flags
& HAMMER_INODE_TRUNCATED
) {
2500 if (hammer_cursor_ondisk(&cursor
)) {
2501 if (ip
->sync_trunc_off
<= rec_offset
)
2503 else if (ip
->sync_trunc_off
< rec_offset
+ n
)
2504 n
= (int)(ip
->sync_trunc_off
- rec_offset
);
2509 * Try to issue a direct read into our bio if possible,
2510 * otherwise resolve the element data into a hammer_buffer
2513 * The buffer on-disk should be zerod past any real
2514 * truncation point, but may not be for any synthesized
2515 * truncation point from above.
2517 disk_offset
= cursor
.leaf
->data_offset
+ roff
;
2518 if (boff
== 0 && n
== bp
->b_bufsize
&&
2519 hammer_cursor_ondisk(&cursor
) &&
2520 (disk_offset
& HAMMER_BUFMASK
) == 0) {
2521 KKASSERT((disk_offset
& HAMMER_OFF_ZONE_MASK
) ==
2522 HAMMER_ZONE_LARGE_DATA
);
2523 nbio
->bio_offset
= disk_offset
;
2524 error
= hammer_io_direct_read(trans
.hmp
, nbio
,
2528 error
= hammer_ip_resolve_data(&cursor
);
2530 bcopy((char *)cursor
.data
+ roff
,
2531 (char *)bp
->b_data
+ boff
, n
);
2538 * Iterate until we have filled the request.
2541 if (boff
== bp
->b_bufsize
)
2543 error
= hammer_ip_next(&cursor
);
2547 * There may have been a gap after the last record
2549 if (error
== ENOENT
)
2551 if (error
== 0 && boff
!= bp
->b_bufsize
) {
2552 KKASSERT(boff
< bp
->b_bufsize
);
2553 bzero((char *)bp
->b_data
+ boff
, bp
->b_bufsize
- boff
);
2554 /* boff = bp->b_bufsize; */
2557 bp
->b_error
= error
;
2559 bp
->b_flags
|= B_ERROR
;
2564 * Cache the b-tree node for the last data read in cache[1].
2566 * If we hit the file EOF then also cache the node in the
2567 * governing director's cache[3], it will be used to initialize
2568 * the inode's cache[1] for any inodes looked up via the directory.
2570 * This doesn't reduce disk accesses since the B-Tree chain is
2571 * likely cached, but it does reduce cpu overhead when looking
2572 * up file offsets for cpdup/tar/cpio style iterations.
2575 hammer_cache_node(&ip
->cache
[1], cursor
.node
);
2576 if (ran_end
>= ip
->ino_data
.size
) {
2577 dip
= hammer_find_inode(&trans
, ip
->ino_data
.parent_obj_id
,
2578 ip
->obj_asof
, ip
->obj_localization
);
2580 hammer_cache_node(&dip
->cache
[3], cursor
.node
);
2581 hammer_rel_inode(dip
, 0);
2584 hammer_done_cursor(&cursor
);
2585 hammer_done_transaction(&trans
);
2590 * BMAP operation - used to support cluster_read() only.
2592 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
2594 * This routine may return EOPNOTSUPP if the opration is not supported for
2595 * the specified offset. The contents of the pointer arguments do not
2596 * need to be initialized in that case.
2598 * If a disk address is available and properly aligned return 0 with
2599 * *doffsetp set to the zone-2 address, and *runp / *runb set appropriately
2600 * to the run-length relative to that offset. Callers may assume that
2601 * *doffsetp is valid if 0 is returned, even if *runp is not sufficiently
2602 * large, so return EOPNOTSUPP if it is not sufficiently large.
2606 hammer_vop_bmap(struct vop_bmap_args
*ap
)
2608 struct hammer_transaction trans
;
2609 struct hammer_inode
*ip
;
2610 struct hammer_cursor cursor
;
2611 hammer_base_elm_t base
;
2615 int64_t base_offset
;
2616 int64_t base_disk_offset
;
2617 int64_t last_offset
;
2618 hammer_off_t last_disk_offset
;
2619 hammer_off_t disk_offset
;
2624 ++hammer_stats_file_iopsr
;
2625 ip
= ap
->a_vp
->v_data
;
2628 * We can only BMAP regular files. We can't BMAP database files,
2631 if (ip
->ino_data
.obj_type
!= HAMMER_OBJTYPE_REGFILE
)
2635 * bmap is typically called with runp/runb both NULL when used
2636 * for writing. We do not support BMAP for writing atm.
2638 if (ap
->a_cmd
!= BUF_CMD_READ
)
2642 * Scan the B-Tree to acquire blockmap addresses, then translate
2645 hammer_simple_transaction(&trans
, ip
->hmp
);
2647 kprintf("bmap_beg %016llx ip->cache %p\n",
2648 (long long)ap
->a_loffset
, ip
->cache
[1]);
2650 hammer_init_cursor(&trans
, &cursor
, &ip
->cache
[1], ip
);
2653 * Key range (begin and end inclusive) to scan. Note that the key's
2654 * stored in the actual records represent BASE+LEN, not BASE. The
2655 * first record containing bio_offset will have a key > bio_offset.
2657 cursor
.key_beg
.localization
= ip
->obj_localization
+
2658 HAMMER_LOCALIZE_MISC
;
2659 cursor
.key_beg
.obj_id
= ip
->obj_id
;
2660 cursor
.key_beg
.create_tid
= 0;
2661 cursor
.key_beg
.delete_tid
= 0;
2662 cursor
.key_beg
.obj_type
= 0;
2664 cursor
.key_beg
.key
= ap
->a_loffset
- MAXPHYS
+ 1;
2666 cursor
.key_beg
.key
= ap
->a_loffset
+ 1;
2667 if (cursor
.key_beg
.key
< 0)
2668 cursor
.key_beg
.key
= 0;
2669 cursor
.asof
= ip
->obj_asof
;
2670 cursor
.flags
|= HAMMER_CURSOR_ASOF
;
2672 cursor
.key_end
= cursor
.key_beg
;
2673 KKASSERT(ip
->ino_data
.obj_type
== HAMMER_OBJTYPE_REGFILE
);
2675 ran_end
= ap
->a_loffset
+ MAXPHYS
;
2676 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DATA
;
2677 cursor
.key_end
.rec_type
= HAMMER_RECTYPE_DATA
;
2678 tmp64
= ran_end
+ MAXPHYS
+ 1; /* work-around GCC-4 bug */
2679 if (tmp64
< ran_end
)
2680 cursor
.key_end
.key
= 0x7FFFFFFFFFFFFFFFLL
;
2682 cursor
.key_end
.key
= ran_end
+ MAXPHYS
+ 1;
2684 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
;
2686 error
= hammer_ip_first(&cursor
);
2687 base_offset
= last_offset
= 0;
2688 base_disk_offset
= last_disk_offset
= 0;
2690 while (error
== 0) {
2692 * Get the base file offset of the record. The key for
2693 * data records is (base + bytes) rather then (base).
2695 * NOTE: rec_offset + rec_len may exceed the end-of-file.
2696 * The extra bytes should be zero on-disk and the BMAP op
2697 * should still be ok.
2699 base
= &cursor
.leaf
->base
;
2700 rec_offset
= base
->key
- cursor
.leaf
->data_len
;
2701 rec_len
= cursor
.leaf
->data_len
;
2704 * Incorporate any cached truncation.
2706 * NOTE: Modifications to rec_len based on synthesized
2707 * truncation points remove the guarantee that any extended
2708 * data on disk is zero (since the truncations may not have
2709 * taken place on-media yet).
2711 if (ip
->flags
& HAMMER_INODE_TRUNCATED
) {
2712 if (hammer_cursor_ondisk(&cursor
) ||
2713 cursor
.iprec
->flush_state
== HAMMER_FST_FLUSH
) {
2714 if (ip
->trunc_off
<= rec_offset
)
2716 else if (ip
->trunc_off
< rec_offset
+ rec_len
)
2717 rec_len
= (int)(ip
->trunc_off
- rec_offset
);
2720 if (ip
->sync_flags
& HAMMER_INODE_TRUNCATED
) {
2721 if (hammer_cursor_ondisk(&cursor
)) {
2722 if (ip
->sync_trunc_off
<= rec_offset
)
2724 else if (ip
->sync_trunc_off
< rec_offset
+ rec_len
)
2725 rec_len
= (int)(ip
->sync_trunc_off
- rec_offset
);
2730 * Accumulate information. If we have hit a discontiguous
2731 * block reset base_offset unless we are already beyond the
2732 * requested offset. If we are, that's it, we stop.
2736 if (hammer_cursor_ondisk(&cursor
)) {
2737 disk_offset
= cursor
.leaf
->data_offset
;
2738 if (rec_offset
!= last_offset
||
2739 disk_offset
!= last_disk_offset
) {
2740 if (rec_offset
> ap
->a_loffset
)
2742 base_offset
= rec_offset
;
2743 base_disk_offset
= disk_offset
;
2745 last_offset
= rec_offset
+ rec_len
;
2746 last_disk_offset
= disk_offset
+ rec_len
;
2748 error
= hammer_ip_next(&cursor
);
2752 kprintf("BMAP %016llx: %016llx - %016llx\n",
2753 (long long)ap
->a_loffset
,
2754 (long long)base_offset
,
2755 (long long)last_offset
);
2756 kprintf("BMAP %16s: %016llx - %016llx\n", "",
2757 (long long)base_disk_offset
,
2758 (long long)last_disk_offset
);
2762 hammer_cache_node(&ip
->cache
[1], cursor
.node
);
2764 kprintf("bmap_end2 %016llx ip->cache %p\n",
2765 (long long)ap
->a_loffset
, ip
->cache
[1]);
2768 hammer_done_cursor(&cursor
);
2769 hammer_done_transaction(&trans
);
2772 * If we couldn't find any records or the records we did find were
2773 * all behind the requested offset, return failure. A forward
2774 * truncation can leave a hole w/ no on-disk records.
2776 if (last_offset
== 0 || last_offset
< ap
->a_loffset
)
2777 return (EOPNOTSUPP
);
2780 * Figure out the block size at the requested offset and adjust
2781 * our limits so the cluster_read() does not create inappropriately
2782 * sized buffer cache buffers.
2784 blksize
= hammer_blocksize(ap
->a_loffset
);
2785 if (hammer_blocksize(base_offset
) != blksize
) {
2786 base_offset
= hammer_blockdemarc(base_offset
, ap
->a_loffset
);
2788 if (last_offset
!= ap
->a_loffset
&&
2789 hammer_blocksize(last_offset
- 1) != blksize
) {
2790 last_offset
= hammer_blockdemarc(ap
->a_loffset
,
2795 * Returning EOPNOTSUPP simply prevents the direct-IO optimization
2798 disk_offset
= base_disk_offset
+ (ap
->a_loffset
- base_offset
);
2800 if ((disk_offset
& HAMMER_OFF_ZONE_MASK
) != HAMMER_ZONE_LARGE_DATA
) {
2802 * Only large-data zones can be direct-IOd
2805 } else if ((disk_offset
& HAMMER_BUFMASK
) ||
2806 (last_offset
- ap
->a_loffset
) < blksize
) {
2808 * doffsetp is not aligned or the forward run size does
2809 * not cover a whole buffer, disallow the direct I/O.
2816 *ap
->a_doffsetp
= disk_offset
;
2818 *ap
->a_runb
= ap
->a_loffset
- base_offset
;
2819 KKASSERT(*ap
->a_runb
>= 0);
2822 *ap
->a_runp
= last_offset
- ap
->a_loffset
;
2823 KKASSERT(*ap
->a_runp
>= 0);
2831 * Write to a regular file. Because this is a strategy call the OS is
2832 * trying to actually get data onto the media.
2836 hammer_vop_strategy_write(struct vop_strategy_args
*ap
)
2838 hammer_record_t record
;
2849 ip
= ap
->a_vp
->v_data
;
2852 blksize
= hammer_blocksize(bio
->bio_offset
);
2853 KKASSERT(bp
->b_bufsize
== blksize
);
2855 if (ip
->flags
& HAMMER_INODE_RO
) {
2856 bp
->b_error
= EROFS
;
2857 bp
->b_flags
|= B_ERROR
;
2863 * Interlock with inode destruction (no in-kernel or directory
2864 * topology visibility). If we queue new IO while trying to
2865 * destroy the inode we can deadlock the vtrunc call in
2866 * hammer_inode_unloadable_check().
2868 * Besides, there's no point flushing a bp associated with an
2869 * inode that is being destroyed on-media and has no kernel
2872 if ((ip
->flags
| ip
->sync_flags
) &
2873 (HAMMER_INODE_DELETING
|HAMMER_INODE_DELETED
)) {
2880 * Reserve space and issue a direct-write from the front-end.
2881 * NOTE: The direct_io code will hammer_bread/bcopy smaller
2884 * An in-memory record will be installed to reference the storage
2885 * until the flusher can get to it.
2887 * Since we own the high level bio the front-end will not try to
2888 * do a direct-read until the write completes.
2890 * NOTE: The only time we do not reserve a full-sized buffers
2891 * worth of data is if the file is small. We do not try to
2892 * allocate a fragment (from the small-data zone) at the end of
2893 * an otherwise large file as this can lead to wildly separated
2896 KKASSERT((bio
->bio_offset
& HAMMER_BUFMASK
) == 0);
2897 KKASSERT(bio
->bio_offset
< ip
->ino_data
.size
);
2898 if (bio
->bio_offset
|| ip
->ino_data
.size
> HAMMER_BUFSIZE
/ 2)
2899 bytes
= bp
->b_bufsize
;
2901 bytes
= ((int)ip
->ino_data
.size
+ 15) & ~15;
2903 record
= hammer_ip_add_bulk(ip
, bio
->bio_offset
, bp
->b_data
,
2906 hammer_io_direct_write(hmp
, record
, bio
);
2907 if (ip
->rsv_recs
> 1 && hmp
->rsv_recs
> hammer_limit_recs
)
2908 hammer_flush_inode(ip
, 0);
2910 bp
->b_bio2
.bio_offset
= NOOFFSET
;
2911 bp
->b_error
= error
;
2912 bp
->b_flags
|= B_ERROR
;
2919 * dounlink - disconnect a directory entry
2921 * XXX whiteout support not really in yet
2924 hammer_dounlink(hammer_transaction_t trans
, struct nchandle
*nch
,
2925 struct vnode
*dvp
, struct ucred
*cred
,
2926 int flags
, int isdir
)
2928 struct namecache
*ncp
;
2931 struct hammer_cursor cursor
;
2933 u_int32_t max_iterations
;
2937 * Calculate the namekey and setup the key range for the scan. This
2938 * works kinda like a chained hash table where the lower 32 bits
2939 * of the namekey synthesize the chain.
2941 * The key range is inclusive of both key_beg and key_end.
2946 if (dip
->flags
& HAMMER_INODE_RO
)
2949 namekey
= hammer_directory_namekey(dip
, ncp
->nc_name
, ncp
->nc_nlen
,
2952 hammer_init_cursor(trans
, &cursor
, &dip
->cache
[1], dip
);
2953 cursor
.key_beg
.localization
= dip
->obj_localization
+
2954 hammer_dir_localization(dip
);
2955 cursor
.key_beg
.obj_id
= dip
->obj_id
;
2956 cursor
.key_beg
.key
= namekey
;
2957 cursor
.key_beg
.create_tid
= 0;
2958 cursor
.key_beg
.delete_tid
= 0;
2959 cursor
.key_beg
.rec_type
= HAMMER_RECTYPE_DIRENTRY
;
2960 cursor
.key_beg
.obj_type
= 0;
2962 cursor
.key_end
= cursor
.key_beg
;
2963 cursor
.key_end
.key
+= max_iterations
;
2964 cursor
.asof
= dip
->obj_asof
;
2965 cursor
.flags
|= HAMMER_CURSOR_END_INCLUSIVE
| HAMMER_CURSOR_ASOF
;
2968 * Scan all matching records (the chain), locate the one matching
2969 * the requested path component. info->last_error contains the
2970 * error code on search termination and could be 0, ENOENT, or
2973 * The hammer_ip_*() functions merge in-memory records with on-disk
2974 * records for the purposes of the search.
2976 error
= hammer_ip_first(&cursor
);
2978 while (error
== 0) {
2979 error
= hammer_ip_resolve_data(&cursor
);
2982 nlen
= cursor
.leaf
->data_len
- HAMMER_ENTRY_NAME_OFF
;
2984 if (ncp
->nc_nlen
== nlen
&&
2985 bcmp(ncp
->nc_name
, cursor
.data
->entry
.name
, nlen
) == 0) {
2988 error
= hammer_ip_next(&cursor
);
2992 * If all is ok we have to get the inode so we can adjust nlinks.
2993 * To avoid a deadlock with the flusher we must release the inode
2994 * lock on the directory when acquiring the inode for the entry.
2996 * If the target is a directory, it must be empty.
2999 hammer_unlock(&cursor
.ip
->lock
);
3000 ip
= hammer_get_inode(trans
, dip
, cursor
.data
->entry
.obj_id
,
3002 cursor
.data
->entry
.localization
,
3004 hammer_lock_sh(&cursor
.ip
->lock
);
3005 if (error
== ENOENT
) {
3006 kprintf("HAMMER: WARNING: Removing "
3007 "dirent w/missing inode \"%s\"\n"
3008 "\tobj_id = %016llx\n",
3010 (long long)cursor
.data
->entry
.obj_id
);
3015 * If isdir >= 0 we validate that the entry is or is not a
3016 * directory. If isdir < 0 we don't care.
3018 if (error
== 0 && isdir
>= 0 && ip
) {
3020 ip
->ino_data
.obj_type
!= HAMMER_OBJTYPE_DIRECTORY
) {
3022 } else if (isdir
== 0 &&
3023 ip
->ino_data
.obj_type
== HAMMER_OBJTYPE_DIRECTORY
) {
3029 * If we are trying to remove a directory the directory must
3032 * The check directory code can loop and deadlock/retry. Our
3033 * own cursor's node locks must be released to avoid a 3-way
3034 * deadlock with the flusher if the check directory code
3037 * If any changes whatsoever have been made to the cursor
3038 * set EDEADLK and retry.
3040 if (error
== 0 && ip
&& ip
->ino_data
.obj_type
==
3041 HAMMER_OBJTYPE_DIRECTORY
) {
3042 hammer_unlock_cursor(&cursor
);
3043 error
= hammer_ip_check_directory_empty(trans
, ip
);
3044 hammer_lock_cursor(&cursor
);
3045 if (cursor
.flags
& HAMMER_CURSOR_RETEST
) {
3046 kprintf("HAMMER: Warning: avoided deadlock "
3054 * Delete the directory entry.
3056 * WARNING: hammer_ip_del_directory() may have to terminate
3057 * the cursor to avoid a deadlock. It is ok to call
3058 * hammer_done_cursor() twice.
3061 error
= hammer_ip_del_directory(trans
, &cursor
,
3064 hammer_done_cursor(&cursor
);
3066 cache_setunresolved(nch
);
3067 cache_setvp(nch
, NULL
);
3070 hammer_knote(ip
->vp
, NOTE_DELETE
);
3071 cache_inval_vp(ip
->vp
, CINV_DESTROY
);
3075 hammer_rel_inode(ip
, 0);
3077 hammer_done_cursor(&cursor
);
3079 if (error
== EDEADLK
)
3085 /************************************************************************
3086 * FIFO AND SPECFS OPS *
3087 ************************************************************************
3092 hammer_vop_fifoclose (struct vop_close_args
*ap
)
3094 /* XXX update itimes */
3095 return (VOCALL(&fifo_vnode_vops
, &ap
->a_head
));
3099 hammer_vop_fiforead (struct vop_read_args
*ap
)
3103 error
= VOCALL(&fifo_vnode_vops
, &ap
->a_head
);
3104 /* XXX update access time */
3109 hammer_vop_fifowrite (struct vop_write_args
*ap
)
3113 error
= VOCALL(&fifo_vnode_vops
, &ap
->a_head
);
3114 /* XXX update access time */
3120 hammer_vop_fifokqfilter(struct vop_kqfilter_args
*ap
)
3124 error
= VOCALL(&fifo_vnode_vops
, &ap
->a_head
);
3126 error
= hammer_vop_kqfilter(ap
);
3130 /************************************************************************
3132 ************************************************************************
3135 static void filt_hammerdetach(struct knote
*kn
);
3136 static int filt_hammerread(struct knote
*kn
, long hint
);
3137 static int filt_hammerwrite(struct knote
*kn
, long hint
);
3138 static int filt_hammervnode(struct knote
*kn
, long hint
);
3140 static struct filterops hammerread_filtops
=
3141 { 1, NULL
, filt_hammerdetach
, filt_hammerread
};
3142 static struct filterops hammerwrite_filtops
=
3143 { 1, NULL
, filt_hammerdetach
, filt_hammerwrite
};
3144 static struct filterops hammervnode_filtops
=
3145 { 1, NULL
, filt_hammerdetach
, filt_hammervnode
};
3149 hammer_vop_kqfilter(struct vop_kqfilter_args
*ap
)
3151 struct vnode
*vp
= ap
->a_vp
;
3152 struct knote
*kn
= ap
->a_kn
;
3155 switch (kn
->kn_filter
) {
3157 kn
->kn_fop
= &hammerread_filtops
;
3160 kn
->kn_fop
= &hammerwrite_filtops
;
3163 kn
->kn_fop
= &hammervnode_filtops
;
3169 kn
->kn_hook
= (caddr_t
)vp
;
3171 lwkt_gettoken(&vlock
, &vp
->v_token
);
3172 SLIST_INSERT_HEAD(&vp
->v_pollinfo
.vpi_selinfo
.si_note
, kn
, kn_selnext
);
3173 lwkt_reltoken(&vlock
);
3179 filt_hammerdetach(struct knote
*kn
)
3181 struct vnode
*vp
= (void *)kn
->kn_hook
;
3184 lwkt_gettoken(&vlock
, &vp
->v_token
);
3185 SLIST_REMOVE(&vp
->v_pollinfo
.vpi_selinfo
.si_note
,
3186 kn
, knote
, kn_selnext
);
3187 lwkt_reltoken(&vlock
);
3191 filt_hammerread(struct knote
*kn
, long hint
)
3193 struct vnode
*vp
= (void *)kn
->kn_hook
;
3194 hammer_inode_t ip
= VTOI(vp
);
3196 if (hint
== NOTE_REVOKE
) {
3197 kn
->kn_flags
|= (EV_EOF
| EV_ONESHOT
);
3200 kn
->kn_data
= ip
->ino_data
.size
- kn
->kn_fp
->f_offset
;
3201 return (kn
->kn_data
!= 0);
3205 filt_hammerwrite(struct knote
*kn
, long hint
)
3207 if (hint
== NOTE_REVOKE
)
3208 kn
->kn_flags
|= (EV_EOF
| EV_ONESHOT
);
3214 filt_hammervnode(struct knote
*kn
, long hint
)
3216 if (kn
->kn_sfflags
& hint
)
3217 kn
->kn_fflags
|= hint
;
3218 if (hint
== NOTE_REVOKE
) {
3219 kn
->kn_flags
|= EV_EOF
;
3222 return (kn
->kn_fflags
!= 0);