2 * Copyright (c) 2011-2015 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@dragonflybsd.org>
6 * by Venkatesh Srinivas <vsrinivas@dragonflybsd.org>
7 * by Daniel Flores (GSOC 2013 - mentored by Matthew Dillon, compression)
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
19 * 3. Neither the name of The DragonFly Project nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific, prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
26 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
27 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
29 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
31 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
33 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * Kernel Filesystem interface
39 * NOTE! local ipdata pointers must be reloaded on any modifying operation
40 * to the inode as its underlying chain may have changed.
43 #include <sys/param.h>
44 #include <sys/systm.h>
45 #include <sys/kernel.h>
46 #include <sys/fcntl.h>
49 #include <sys/namei.h>
50 #include <sys/mount.h>
51 #include <sys/vnode.h>
52 #include <sys/mountctl.h>
53 #include <sys/dirent.h>
55 #include <sys/objcache.h>
56 #include <sys/event.h>
58 #include <vfs/fifofs/fifo.h>
62 static int hammer2_read_file(hammer2_inode_t
*ip
, struct uio
*uio
,
64 static int hammer2_write_file(hammer2_inode_t
*ip
, struct uio
*uio
,
65 int ioflag
, int seqcount
);
66 static void hammer2_extend_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
);
67 static void hammer2_truncate_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
);
69 struct objcache
*cache_xops
;
73 hammer2_knote(struct vnode
*vp
, int flags
)
76 KNOTE(&vp
->v_pollinfo
.vpi_kqinfo
.ki_note
, flags
);
80 * Last reference to a vnode is going away but it is still cached.
84 hammer2_vop_inactive(struct vop_inactive_args
*ap
)
103 * Check for deleted inodes and recycle immediately on the last
104 * release. Be sure to destroy any left-over buffer cache buffers
105 * so we do not waste time trying to flush them.
107 * Note that deleting the file block chains under the inode chain
108 * would just be a waste of energy, so don't do it.
110 * WARNING: nvtruncbuf() can only be safely called without the inode
111 * lock held due to the way our write thread works.
113 if (ip
->flags
& HAMMER2_INODE_ISUNLINKED
) {
118 * Detect updates to the embedded data which may be
119 * synchronized by the strategy code. Simply mark the
120 * inode modified so it gets picked up by our normal flush.
122 nblksize
= hammer2_calc_logical(ip
, 0, &lbase
, NULL
);
123 nvtruncbuf(vp
, 0, nblksize
, 0, 0);
131 * Reclaim a vnode so that it can be reused; after the inode is
132 * disassociated, the filesystem must manage it alone.
136 hammer2_vop_reclaim(struct vop_reclaim_args
*ap
)
152 * The final close of a deleted file or directory marks it for
153 * destruction. The DELETED flag allows the flusher to shortcut
154 * any modified blocks still unflushed (that is, just ignore them).
156 * HAMMER2 usually does not try to optimize the freemap by returning
157 * deleted blocks to it as it does not usually know how many snapshots
158 * might be referencing portions of the file/dir.
164 * NOTE! We do not attempt to flush chains here, flushing is
165 * really fragile and could also deadlock.
170 * This occurs if the inode was unlinked while open. Reclamation of
171 * these inodes requires processing we cannot safely do here so add
172 * the inode to the sideq in that situation.
174 * A modified inode may require chain synchronization which will no
175 * longer be driven by a sync or fsync without the vnode, also use
176 * the sideq for that.
178 * A reclaim can occur at any time so we cannot safely start a
179 * transaction to handle reclamation of unlinked files. Instead,
180 * the ip is left with a reference and placed on a linked list and
184 if ((ip
->flags
& (HAMMER2_INODE_ISUNLINKED
|
185 HAMMER2_INODE_MODIFIED
|
186 HAMMER2_INODE_RESIZED
)) &&
187 (ip
->flags
& HAMMER2_INODE_ISDELETED
) == 0) {
188 hammer2_inode_sideq_t
*ipul
;
190 ipul
= kmalloc(sizeof(*ipul
), pmp
->minode
, M_WAITOK
| M_ZERO
);
193 hammer2_spin_ex(&pmp
->list_spin
);
194 if ((ip
->flags
& HAMMER2_INODE_ONSIDEQ
) == 0) {
196 atomic_set_int(&ip
->flags
, HAMMER2_INODE_ONSIDEQ
);
197 TAILQ_INSERT_TAIL(&pmp
->sideq
, ipul
, entry
);
198 hammer2_spin_unex(&pmp
->list_spin
);
200 hammer2_spin_unex(&pmp
->list_spin
);
201 kfree(ipul
, pmp
->minode
);
202 hammer2_inode_drop(ip
); /* vp ref */
204 /* retain ref from vp for ipul */
206 hammer2_inode_drop(ip
); /* vp ref */
210 * XXX handle background sync when ip dirty, kernel will no longer
211 * notify us regarding this inode because there is no longer a
212 * vnode attached to it.
221 hammer2_vop_fsync(struct vop_fsync_args
*ap
)
231 /* XXX can't do this yet */
232 hammer2_trans_init(ip
->pmp
, HAMMER2_TRANS_ISFLUSH
);
233 vfsync(vp
, ap
->a_waitfor
, 1, NULL
, NULL
);
235 hammer2_trans_init(ip
->pmp
, 0);
236 vfsync(vp
, ap
->a_waitfor
, 1, NULL
, NULL
);
239 * Calling chain_flush here creates a lot of duplicative
240 * COW operations due to non-optimal vnode ordering.
242 * Only do it for an actual fsync() syscall. The other forms
243 * which call this function will eventually call chain_flush
244 * on the volume root as a catch-all, which is far more optimal.
246 hammer2_inode_lock(ip
, 0);
247 if (ip
->flags
& HAMMER2_INODE_MODIFIED
)
248 hammer2_inode_chain_sync(ip
);
249 hammer2_inode_unlock(ip
);
250 hammer2_trans_done(ip
->pmp
);
258 hammer2_vop_access(struct vop_access_args
*ap
)
260 hammer2_inode_t
*ip
= VTOI(ap
->a_vp
);
266 hammer2_inode_lock(ip
, HAMMER2_RESOLVE_SHARED
);
267 uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
268 gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
269 error
= vop_helper_access(ap
, uid
, gid
, ip
->meta
.mode
, ip
->meta
.uflags
);
270 hammer2_inode_unlock(ip
);
278 hammer2_vop_getattr(struct vop_getattr_args
*ap
)
284 hammer2_chain_t
*chain
;
294 hammer2_inode_lock(ip
, HAMMER2_RESOLVE_SHARED
);
296 vap
->va_fsid
= pmp
->mp
->mnt_stat
.f_fsid
.val
[0];
297 vap
->va_fileid
= ip
->meta
.inum
;
298 vap
->va_mode
= ip
->meta
.mode
;
299 vap
->va_nlink
= ip
->meta
.nlinks
;
300 vap
->va_uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
301 vap
->va_gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
304 vap
->va_size
= ip
->meta
.size
; /* protected by shared lock */
305 vap
->va_blocksize
= HAMMER2_PBUFSIZE
;
306 vap
->va_flags
= ip
->meta
.uflags
;
307 hammer2_time_to_timespec(ip
->meta
.ctime
, &vap
->va_ctime
);
308 hammer2_time_to_timespec(ip
->meta
.mtime
, &vap
->va_mtime
);
309 hammer2_time_to_timespec(ip
->meta
.mtime
, &vap
->va_atime
);
312 if (ip
->meta
.type
== HAMMER2_OBJTYPE_DIRECTORY
) {
314 * Can't really calculate directory use sans the files under
315 * it, just assume one block for now.
317 vap
->va_bytes
+= HAMMER2_INODE_BYTES
;
319 for (i
= 0; i
< ip
->cluster
.nchains
; ++i
) {
320 if ((chain
= ip
->cluster
.array
[i
].chain
) != NULL
) {
322 chain
->bref
.embed
.stats
.data_count
) {
324 chain
->bref
.embed
.stats
.data_count
;
329 vap
->va_type
= hammer2_get_vtype(ip
->meta
.type
);
331 vap
->va_uid_uuid
= ip
->meta
.uid
;
332 vap
->va_gid_uuid
= ip
->meta
.gid
;
333 vap
->va_vaflags
= VA_UID_UUID_VALID
| VA_GID_UUID_VALID
|
336 hammer2_inode_unlock(ip
);
344 hammer2_vop_setattr(struct vop_setattr_args
*ap
)
356 hammer2_update_time(&ctime
);
360 if (ip
->pmp
->ronly
) {
365 hammer2_pfs_memory_wait(ip
->pmp
);
366 hammer2_trans_init(ip
->pmp
, 0);
367 hammer2_inode_lock(ip
, 0);
370 if (vap
->va_flags
!= VNOVAL
) {
373 flags
= ip
->meta
.uflags
;
374 error
= vop_helper_setattr_flags(&flags
, vap
->va_flags
,
375 hammer2_to_unix_xid(&ip
->meta
.uid
),
378 if (ip
->meta
.uflags
!= flags
) {
379 hammer2_inode_modify(ip
);
380 ip
->meta
.uflags
= flags
;
381 ip
->meta
.ctime
= ctime
;
382 kflags
|= NOTE_ATTRIB
;
384 if (ip
->meta
.uflags
& (IMMUTABLE
| APPEND
)) {
391 if (ip
->meta
.uflags
& (IMMUTABLE
| APPEND
)) {
395 if (vap
->va_uid
!= (uid_t
)VNOVAL
|| vap
->va_gid
!= (gid_t
)VNOVAL
) {
396 mode_t cur_mode
= ip
->meta
.mode
;
397 uid_t cur_uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
398 gid_t cur_gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
402 error
= vop_helper_chown(ap
->a_vp
, vap
->va_uid
, vap
->va_gid
,
404 &cur_uid
, &cur_gid
, &cur_mode
);
406 hammer2_guid_to_uuid(&uuid_uid
, cur_uid
);
407 hammer2_guid_to_uuid(&uuid_gid
, cur_gid
);
408 if (bcmp(&uuid_uid
, &ip
->meta
.uid
, sizeof(uuid_uid
)) ||
409 bcmp(&uuid_gid
, &ip
->meta
.gid
, sizeof(uuid_gid
)) ||
410 ip
->meta
.mode
!= cur_mode
412 hammer2_inode_modify(ip
);
413 ip
->meta
.uid
= uuid_uid
;
414 ip
->meta
.gid
= uuid_gid
;
415 ip
->meta
.mode
= cur_mode
;
416 ip
->meta
.ctime
= ctime
;
418 kflags
|= NOTE_ATTRIB
;
425 if (vap
->va_size
!= VNOVAL
&& ip
->meta
.size
!= vap
->va_size
) {
428 if (vap
->va_size
== ip
->meta
.size
)
430 if (vap
->va_size
< ip
->meta
.size
) {
431 hammer2_mtx_ex(&ip
->truncate_lock
);
432 hammer2_truncate_file(ip
, vap
->va_size
);
433 hammer2_mtx_unlock(&ip
->truncate_lock
);
435 hammer2_extend_file(ip
, vap
->va_size
);
437 hammer2_inode_modify(ip
);
438 ip
->meta
.mtime
= ctime
;
446 /* atime not supported */
447 if (vap
->va_atime
.tv_sec
!= VNOVAL
) {
448 hammer2_inode_modify(ip
);
449 ip
->meta
.atime
= hammer2_timespec_to_time(&vap
->va_atime
);
450 kflags
|= NOTE_ATTRIB
;
453 if (vap
->va_mode
!= (mode_t
)VNOVAL
) {
454 mode_t cur_mode
= ip
->meta
.mode
;
455 uid_t cur_uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
456 gid_t cur_gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
458 error
= vop_helper_chmod(ap
->a_vp
, vap
->va_mode
, ap
->a_cred
,
459 cur_uid
, cur_gid
, &cur_mode
);
460 if (error
== 0 && ip
->meta
.mode
!= cur_mode
) {
461 hammer2_inode_modify(ip
);
462 ip
->meta
.mode
= cur_mode
;
463 ip
->meta
.ctime
= ctime
;
464 kflags
|= NOTE_ATTRIB
;
468 if (vap
->va_mtime
.tv_sec
!= VNOVAL
) {
469 hammer2_inode_modify(ip
);
470 ip
->meta
.mtime
= hammer2_timespec_to_time(&vap
->va_mtime
);
471 kflags
|= NOTE_ATTRIB
;
476 * If a truncation occurred we must call inode_fsync() now in order
477 * to trim the related data chains, otherwise a later expansion can
480 * If an extend occured that changed the DIRECTDATA state, we must
481 * call inode_fsync now in order to prepare the inode's indirect
484 if (ip
->flags
& HAMMER2_INODE_RESIZED
)
485 hammer2_inode_chain_sync(ip
);
490 hammer2_inode_unlock(ip
);
491 hammer2_trans_done(ip
->pmp
);
492 hammer2_knote(ip
->vp
, kflags
);
500 hammer2_vop_readdir(struct vop_readdir_args
*ap
)
502 hammer2_xop_readdir_t
*xop
;
503 hammer2_blockref_t bref
;
519 saveoff
= uio
->uio_offset
;
524 * Setup cookies directory entry cookies if requested
526 if (ap
->a_ncookies
) {
527 ncookies
= uio
->uio_resid
/ 16 + 1;
530 cookies
= kmalloc(ncookies
* sizeof(off_t
), M_TEMP
, M_WAITOK
);
537 hammer2_inode_lock(ip
, HAMMER2_RESOLVE_SHARED
);
540 * Handle artificial entries. To ensure that only positive 64 bit
541 * quantities are returned to userland we always strip off bit 63.
542 * The hash code is designed such that codes 0x0000-0x7FFF are not
543 * used, allowing us to use these codes for articial entries.
545 * Entry 0 is used for '.' and entry 1 is used for '..'. Do not
546 * allow '..' to cross the mount point into (e.g.) the super-root.
549 inum
= ip
->meta
.inum
& HAMMER2_DIRHASH_USERMSK
;
550 r
= vop_write_dirent(&error
, uio
, inum
, DT_DIR
, 1, ".");
554 cookies
[cookie_index
] = saveoff
;
557 if (cookie_index
== ncookies
)
563 * Be careful with lockorder when accessing ".."
565 * (ip is the current dir. xip is the parent dir).
567 inum
= ip
->meta
.inum
& HAMMER2_DIRHASH_USERMSK
;
568 if (ip
!= ip
->pmp
->iroot
)
569 inum
= ip
->meta
.iparent
& HAMMER2_DIRHASH_USERMSK
;
570 r
= vop_write_dirent(&error
, uio
, inum
, DT_DIR
, 2, "..");
574 cookies
[cookie_index
] = saveoff
;
577 if (cookie_index
== ncookies
)
581 lkey
= saveoff
| HAMMER2_DIRHASH_VISIBLE
;
582 if (hammer2_debug
& 0x0020)
583 kprintf("readdir: lkey %016jx\n", lkey
);
588 * Use XOP for cluster scan.
590 * parent is the inode cluster, already locked for us. Don't
591 * double lock shared locks as this will screw up upgrades.
593 xop
= hammer2_xop_alloc(ip
, 0);
595 hammer2_xop_start(&xop
->head
, hammer2_xop_readdir
);
598 const hammer2_inode_data_t
*ripdata
;
602 error
= hammer2_xop_collect(&xop
->head
, 0);
605 if (cookie_index
== ncookies
)
607 if (hammer2_debug
& 0x0020)
608 kprintf("cluster chain %p %p\n",
609 xop
->head
.cluster
.focus
,
610 (xop
->head
.cluster
.focus
?
611 xop
->head
.cluster
.focus
->data
: (void *)-1));
612 hammer2_cluster_bref(&xop
->head
.cluster
, &bref
);
614 if (bref
.type
== HAMMER2_BREF_TYPE_INODE
) {
616 &hammer2_cluster_rdata(&xop
->head
.cluster
)->ipdata
;
617 dtype
= hammer2_get_dtype(ripdata
->meta
.type
);
618 saveoff
= bref
.key
& HAMMER2_DIRHASH_USERMSK
;
619 r
= vop_write_dirent(&error
, uio
,
621 HAMMER2_DIRHASH_USERMSK
,
623 ripdata
->meta
.name_len
,
628 cookies
[cookie_index
] = saveoff
;
630 } else if (bref
.type
== HAMMER2_BREF_TYPE_DIRENT
) {
631 dtype
= hammer2_get_dtype(bref
.embed
.dirent
.type
);
632 saveoff
= bref
.key
& HAMMER2_DIRHASH_USERMSK
;
633 if (bref
.embed
.dirent
.namlen
<=
634 sizeof(bref
.check
.buf
)) {
635 dname
= bref
.check
.buf
;
638 hammer2_cluster_rdata(&xop
->head
.cluster
)->buf
;
640 r
= vop_write_dirent(&error
, uio
,
641 bref
.embed
.dirent
.inum
,
643 bref
.embed
.dirent
.namlen
,
648 cookies
[cookie_index
] = saveoff
;
651 /* XXX chain error */
652 kprintf("bad chain type readdir %d\n", bref
.type
);
655 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
656 if (error
== ENOENT
) {
659 saveoff
= (hammer2_key_t
)-1;
661 saveoff
= bref
.key
& HAMMER2_DIRHASH_USERMSK
;
664 hammer2_inode_unlock(ip
);
666 *ap
->a_eofflag
= eofflag
;
667 if (hammer2_debug
& 0x0020)
668 kprintf("readdir: done at %016jx\n", saveoff
);
669 uio
->uio_offset
= saveoff
& ~HAMMER2_DIRHASH_VISIBLE
;
670 if (error
&& cookie_index
== 0) {
672 kfree(cookies
, M_TEMP
);
674 *ap
->a_cookies
= NULL
;
678 *ap
->a_ncookies
= cookie_index
;
679 *ap
->a_cookies
= cookies
;
687 * hammer2_vop_readlink { vp, uio, cred }
691 hammer2_vop_readlink(struct vop_readlink_args
*ap
)
698 if (vp
->v_type
!= VLNK
)
702 error
= hammer2_read_file(ip
, ap
->a_uio
, 0);
708 hammer2_vop_read(struct vop_read_args
*ap
)
718 * Read operations supported on this vnode?
721 if (vp
->v_type
!= VREG
)
731 seqcount
= ap
->a_ioflag
>> 16;
732 bigread
= (uio
->uio_resid
> 100 * 1024 * 1024);
734 error
= hammer2_read_file(ip
, uio
, seqcount
);
740 hammer2_vop_write(struct vop_write_args
*ap
)
750 * Read operations supported on this vnode?
753 if (vp
->v_type
!= VREG
)
762 if (ip
->pmp
->ronly
) {
766 seqcount
= ap
->a_ioflag
>> 16;
769 * Check resource limit
771 if (uio
->uio_resid
> 0 && (td
= uio
->uio_td
) != NULL
&& td
->td_proc
&&
772 uio
->uio_offset
+ uio
->uio_resid
>
773 td
->td_proc
->p_rlimit
[RLIMIT_FSIZE
].rlim_cur
) {
774 lwpsignal(td
->td_proc
, td
->td_lwp
, SIGXFSZ
);
779 * The transaction interlocks against flush initiations
780 * (note: but will run concurrently with the actual flush).
782 * To avoid deadlocking against the VM system, we must flag any
783 * transaction related to the buffer cache or other direct
784 * VM page manipulation.
786 if (uio
->uio_segflg
== UIO_NOCOPY
)
787 hammer2_trans_init(ip
->pmp
, HAMMER2_TRANS_BUFCACHE
);
789 hammer2_trans_init(ip
->pmp
, 0);
790 error
= hammer2_write_file(ip
, uio
, ap
->a_ioflag
, seqcount
);
791 hammer2_trans_done(ip
->pmp
);
797 * Perform read operations on a file or symlink given an UNLOCKED
800 * The passed ip is not locked.
804 hammer2_read_file(hammer2_inode_t
*ip
, struct uio
*uio
, int seqcount
)
815 * WARNING! Assumes that the kernel interlocks size changes at the
818 hammer2_mtx_sh(&ip
->lock
);
819 hammer2_mtx_sh(&ip
->truncate_lock
);
820 size
= ip
->meta
.size
;
821 hammer2_mtx_unlock(&ip
->lock
);
823 while (uio
->uio_resid
> 0 && uio
->uio_offset
< size
) {
830 lblksize
= hammer2_calc_logical(ip
, uio
->uio_offset
,
834 error
= cluster_read(ip
->vp
, leof
, lbase
, lblksize
,
835 uio
->uio_resid
, seqcount
* MAXBSIZE
,
838 if (uio
->uio_segflg
== UIO_NOCOPY
) {
839 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
840 if (bp
->b_flags
& B_CACHE
) {
843 if (bp
->b_xio
.xio_npages
!= 16)
844 kprintf("NPAGES BAD\n");
845 for (i
= 0; i
< bp
->b_xio
.xio_npages
; ++i
) {
847 m
= bp
->b_xio
.xio_pages
[i
];
848 if (m
== NULL
|| m
->valid
== 0) {
849 kprintf("bp %016jx %016jx pg %d inv",
852 kprintf("m->object %p/%p", m
->object
, ip
->vp
->v_object
);
858 kprintf("b_flags %08x, b_error %d\n", bp
->b_flags
, bp
->b_error
);
862 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
868 loff
= (int)(uio
->uio_offset
- lbase
);
870 if (n
> uio
->uio_resid
)
872 if (n
> size
- uio
->uio_offset
)
873 n
= (int)(size
- uio
->uio_offset
);
874 bp
->b_flags
|= B_AGE
;
875 uiomovebp(bp
, (char *)bp
->b_data
+ loff
, n
, uio
);
878 hammer2_mtx_unlock(&ip
->truncate_lock
);
884 * Write to the file represented by the inode via the logical buffer cache.
885 * The inode may represent a regular file or a symlink.
887 * The inode must not be locked.
891 hammer2_write_file(hammer2_inode_t
*ip
, struct uio
*uio
,
892 int ioflag
, int seqcount
)
894 hammer2_key_t old_eof
;
895 hammer2_key_t new_eof
;
904 * WARNING! Assumes that the kernel interlocks size changes at the
907 hammer2_mtx_ex(&ip
->lock
);
908 hammer2_mtx_sh(&ip
->truncate_lock
);
909 if (ioflag
& IO_APPEND
)
910 uio
->uio_offset
= ip
->meta
.size
;
911 old_eof
= ip
->meta
.size
;
914 * Extend the file if necessary. If the write fails at some point
915 * we will truncate it back down to cover as much as we were able
918 * Doing this now makes it easier to calculate buffer sizes in
925 if (uio
->uio_offset
+ uio
->uio_resid
> old_eof
) {
926 new_eof
= uio
->uio_offset
+ uio
->uio_resid
;
928 hammer2_extend_file(ip
, new_eof
);
929 kflags
|= NOTE_EXTEND
;
933 hammer2_mtx_unlock(&ip
->lock
);
938 while (uio
->uio_resid
> 0) {
947 * Don't allow the buffer build to blow out the buffer
950 if ((ioflag
& IO_RECURSE
) == 0)
951 bwillwrite(HAMMER2_PBUFSIZE
);
954 * This nominally tells us how much we can cluster and
955 * what the logical buffer size needs to be. Currently
956 * we don't try to cluster the write and just handle one
959 lblksize
= hammer2_calc_logical(ip
, uio
->uio_offset
,
961 loff
= (int)(uio
->uio_offset
- lbase
);
963 KKASSERT(lblksize
<= 65536);
966 * Calculate bytes to copy this transfer and whether the
967 * copy completely covers the buffer or not.
971 if (n
> uio
->uio_resid
) {
973 if (loff
== lbase
&& uio
->uio_offset
+ n
== new_eof
)
981 if (lbase
>= new_eof
)
987 if (uio
->uio_segflg
== UIO_NOCOPY
) {
989 * Issuing a write with the same data backing the
990 * buffer. Instantiate the buffer to collect the
991 * backing vm pages, then read-in any missing bits.
993 * This case is used by vop_stdputpages().
995 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
996 if ((bp
->b_flags
& B_CACHE
) == 0) {
998 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
1000 } else if (trivial
) {
1002 * Even though we are entirely overwriting the buffer
1003 * we may still have to zero it out to avoid a
1004 * mmap/write visibility issue.
1006 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
1007 if ((bp
->b_flags
& B_CACHE
) == 0)
1011 * Partial overwrite, read in any missing bits then
1012 * replace the portion being written.
1014 * (The strategy code will detect zero-fill physical
1015 * blocks for this case).
1017 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
1028 * Ok, copy the data in
1030 error
= uiomovebp(bp
, bp
->b_data
+ loff
, n
, uio
);
1031 kflags
|= NOTE_WRITE
;
1039 * WARNING: Pageout daemon will issue UIO_NOCOPY writes
1040 * with IO_SYNC or IO_ASYNC set. These writes
1041 * must be handled as the pageout daemon expects.
1043 * NOTE! H2 relies on cluster_write() here because it
1044 * cannot preallocate disk blocks at the logical
1045 * level due to not knowing what the compression
1046 * size will be at this time.
1048 * We must use cluster_write() here and we depend
1049 * on the write-behind feature to flush buffers
1050 * appropriately. If we let the buffer daemons do
1051 * it the block allocations will be all over the
1054 if (ioflag
& IO_SYNC
) {
1056 } else if ((ioflag
& IO_DIRECT
) && endofblk
) {
1058 } else if (ioflag
& IO_ASYNC
) {
1060 } else if (ip
->vp
->v_mount
->mnt_flag
& MNT_NOCLUSTERW
) {
1064 bp
->b_flags
|= B_CLUSTEROK
;
1065 cluster_write(bp
, new_eof
, lblksize
, seqcount
);
1067 bp
->b_flags
|= B_CLUSTEROK
;
1074 * Cleanup. If we extended the file EOF but failed to write through
1075 * the entire write is a failure and we have to back-up.
1077 if (error
&& new_eof
!= old_eof
) {
1078 hammer2_mtx_unlock(&ip
->truncate_lock
);
1079 hammer2_mtx_ex(&ip
->lock
);
1080 hammer2_mtx_ex(&ip
->truncate_lock
);
1081 hammer2_truncate_file(ip
, old_eof
);
1082 if (ip
->flags
& HAMMER2_INODE_MODIFIED
)
1083 hammer2_inode_chain_sync(ip
);
1084 hammer2_mtx_unlock(&ip
->lock
);
1085 } else if (modified
) {
1086 hammer2_mtx_ex(&ip
->lock
);
1087 hammer2_inode_modify(ip
);
1088 hammer2_update_time(&ip
->meta
.mtime
);
1089 if (ip
->flags
& HAMMER2_INODE_MODIFIED
)
1090 hammer2_inode_chain_sync(ip
);
1091 hammer2_mtx_unlock(&ip
->lock
);
1092 hammer2_knote(ip
->vp
, kflags
);
1094 hammer2_trans_assert_strategy(ip
->pmp
);
1095 hammer2_mtx_unlock(&ip
->truncate_lock
);
1101 * Truncate the size of a file. The inode must not be locked.
1103 * We must unconditionally set HAMMER2_INODE_RESIZED to properly
1104 * ensure that any on-media data beyond the new file EOF has been destroyed.
1106 * WARNING: nvtruncbuf() can only be safely called without the inode lock
1107 * held due to the way our write thread works. If the truncation
1108 * occurs in the middle of a buffer, nvtruncbuf() is responsible
1109 * for dirtying that buffer and zeroing out trailing bytes.
1111 * WARNING! Assumes that the kernel interlocks size changes at the
1114 * WARNING! Caller assumes responsibility for removing dead blocks
1115 * if INODE_RESIZED is set.
1119 hammer2_truncate_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
)
1121 hammer2_key_t lbase
;
1125 hammer2_mtx_unlock(&ip
->lock
);
1127 nblksize
= hammer2_calc_logical(ip
, nsize
, &lbase
, NULL
);
1128 nvtruncbuf(ip
->vp
, nsize
,
1129 nblksize
, (int)nsize
& (nblksize
- 1),
1132 hammer2_mtx_ex(&ip
->lock
);
1133 KKASSERT((ip
->flags
& HAMMER2_INODE_RESIZED
) == 0);
1134 ip
->osize
= ip
->meta
.size
;
1135 ip
->meta
.size
= nsize
;
1136 atomic_set_int(&ip
->flags
, HAMMER2_INODE_RESIZED
);
1137 hammer2_inode_modify(ip
);
1142 * Extend the size of a file. The inode must not be locked.
1144 * Even though the file size is changing, we do not have to set the
1145 * INODE_RESIZED bit unless the file size crosses the EMBEDDED_BYTES
1146 * boundary. When this occurs a hammer2_inode_chain_sync() is required
1147 * to prepare the inode cluster's indirect block table, otherwise
1148 * async execution of the strategy code will implode on us.
1150 * WARNING! Assumes that the kernel interlocks size changes at the
1153 * WARNING! Caller assumes responsibility for transitioning out
1154 * of the inode DIRECTDATA mode if INODE_RESIZED is set.
1158 hammer2_extend_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
)
1160 hammer2_key_t lbase
;
1161 hammer2_key_t osize
;
1167 KKASSERT((ip
->flags
& HAMMER2_INODE_RESIZED
) == 0);
1168 hammer2_inode_modify(ip
);
1169 osize
= ip
->meta
.size
;
1171 ip
->meta
.size
= nsize
;
1173 if (osize
<= HAMMER2_EMBEDDED_BYTES
&& nsize
> HAMMER2_EMBEDDED_BYTES
) {
1174 atomic_set_int(&ip
->flags
, HAMMER2_INODE_RESIZED
);
1175 hammer2_inode_chain_sync(ip
);
1178 hammer2_mtx_unlock(&ip
->lock
);
1180 oblksize
= hammer2_calc_logical(ip
, osize
, &lbase
, NULL
);
1181 nblksize
= hammer2_calc_logical(ip
, nsize
, &lbase
, NULL
);
1187 hammer2_mtx_ex(&ip
->lock
);
1194 hammer2_vop_nresolve(struct vop_nresolve_args
*ap
)
1196 hammer2_xop_nresolve_t
*xop
;
1197 hammer2_inode_t
*ip
;
1198 hammer2_inode_t
*dip
;
1199 struct namecache
*ncp
;
1204 dip
= VTOI(ap
->a_dvp
);
1205 xop
= hammer2_xop_alloc(dip
, 0);
1207 ncp
= ap
->a_nch
->ncp
;
1208 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1211 * Note: In DragonFly the kernel handles '.' and '..'.
1213 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1214 hammer2_xop_start(&xop
->head
, hammer2_xop_nresolve
);
1216 error
= hammer2_xop_collect(&xop
->head
, 0);
1220 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1222 hammer2_inode_unlock(dip
);
1225 * Acquire the related vnode
1227 * NOTE: For error processing, only ENOENT resolves the namecache
1228 * entry to NULL, otherwise we just return the error and
1229 * leave the namecache unresolved.
1231 * NOTE: multiple hammer2_inode structures can be aliased to the
1232 * same chain element, for example for hardlinks. This
1233 * use case does not 'reattach' inode associations that
1234 * might already exist, but always allocates a new one.
1236 * WARNING: inode structure is locked exclusively via inode_get
1237 * but chain was locked shared. inode_unlock()
1238 * will handle it properly.
1241 vp
= hammer2_igetv(ip
, &error
);
1244 cache_setvp(ap
->a_nch
, vp
);
1245 } else if (error
== ENOENT
) {
1246 cache_setvp(ap
->a_nch
, NULL
);
1248 hammer2_inode_unlock(ip
);
1251 * The vp should not be released until after we've disposed
1252 * of our locks, because it might cause vop_inactive() to
1259 cache_setvp(ap
->a_nch
, NULL
);
1261 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1262 KASSERT(error
|| ap
->a_nch
->ncp
->nc_vp
!= NULL
,
1263 ("resolve error %d/%p ap %p\n",
1264 error
, ap
->a_nch
->ncp
->nc_vp
, ap
));
1272 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args
*ap
)
1274 hammer2_inode_t
*dip
;
1279 dip
= VTOI(ap
->a_dvp
);
1280 inum
= dip
->meta
.iparent
;
1284 error
= hammer2_vfs_vget(ap
->a_dvp
->v_mount
, NULL
,
1295 hammer2_vop_nmkdir(struct vop_nmkdir_args
*ap
)
1297 hammer2_inode_t
*dip
;
1298 hammer2_inode_t
*nip
;
1299 struct namecache
*ncp
;
1300 const uint8_t *name
;
1306 dip
= VTOI(ap
->a_dvp
);
1307 if (dip
->pmp
->ronly
) {
1312 ncp
= ap
->a_nch
->ncp
;
1313 name
= ncp
->nc_name
;
1314 name_len
= ncp
->nc_nlen
;
1316 hammer2_pfs_memory_wait(dip
->pmp
);
1317 hammer2_trans_init(dip
->pmp
, 0);
1319 inum
= hammer2_trans_newinum(dip
->pmp
);
1322 * Create the actual inode as a hidden file in the iroot, then
1323 * create the directory entry. The creation of the actual inode
1324 * sets its nlinks to 1 which is the value we desire.
1326 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1331 error
= hammer2_dirent_create(dip
, name
, name_len
,
1332 nip
->meta
.inum
, nip
->meta
.type
);
1336 KKASSERT(nip
== NULL
);
1339 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1340 hammer2_inode_unlock(nip
);
1344 * Update dip's mtime
1349 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1350 hammer2_update_time(&mtime
);
1351 hammer2_inode_modify(dip
);
1352 dip
->meta
.mtime
= mtime
;
1353 hammer2_inode_unlock(dip
);
1356 hammer2_trans_done(dip
->pmp
);
1359 cache_setunresolved(ap
->a_nch
);
1360 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1368 hammer2_vop_open(struct vop_open_args
*ap
)
1370 return vop_stdopen(ap
);
1374 * hammer2_vop_advlock { vp, id, op, fl, flags }
1378 hammer2_vop_advlock(struct vop_advlock_args
*ap
)
1380 hammer2_inode_t
*ip
= VTOI(ap
->a_vp
);
1383 size
= ip
->meta
.size
;
1384 return (lf_advlock(ap
, &ip
->advlock
, size
));
1389 hammer2_vop_close(struct vop_close_args
*ap
)
1391 return vop_stdclose(ap
);
1395 * hammer2_vop_nlink { nch, dvp, vp, cred }
1397 * Create a hardlink from (vp) to {dvp, nch}.
1401 hammer2_vop_nlink(struct vop_nlink_args
*ap
)
1403 hammer2_inode_t
*tdip
; /* target directory to create link in */
1404 hammer2_inode_t
*ip
; /* inode we are hardlinking to */
1405 struct namecache
*ncp
;
1406 const uint8_t *name
;
1410 if (ap
->a_dvp
->v_mount
!= ap
->a_vp
->v_mount
)
1414 tdip
= VTOI(ap
->a_dvp
);
1415 if (tdip
->pmp
->ronly
) {
1420 ncp
= ap
->a_nch
->ncp
;
1421 name
= ncp
->nc_name
;
1422 name_len
= ncp
->nc_nlen
;
1425 * ip represents the file being hardlinked. The file could be a
1426 * normal file or a hardlink target if it has already been hardlinked.
1427 * (with the new semantics, it will almost always be a hardlink
1430 * Bump nlinks and potentially also create or move the hardlink
1431 * target in the parent directory common to (ip) and (tdip). The
1432 * consolidation code can modify ip->cluster. The returned cluster
1435 ip
= VTOI(ap
->a_vp
);
1436 KASSERT(ip
->pmp
, ("ip->pmp is NULL %p %p", ip
, ip
->pmp
));
1437 hammer2_pfs_memory_wait(ip
->pmp
);
1438 hammer2_trans_init(ip
->pmp
, 0);
1441 * Target should be an indexed inode or there's no way we will ever
1442 * be able to find it!
1444 KKASSERT((ip
->meta
.name_key
& HAMMER2_DIRHASH_VISIBLE
) == 0);
1449 * Can return NULL and error == EXDEV if the common parent
1450 * crosses a directory with the xlink flag set.
1452 hammer2_inode_lock(tdip
, 0);
1453 hammer2_inode_lock(ip
, 0);
1456 * Create the directory entry and bump nlinks.
1459 error
= hammer2_dirent_create(tdip
, name
, name_len
,
1460 ip
->meta
.inum
, ip
->meta
.type
);
1461 hammer2_inode_modify(ip
);
1466 * Update dip's mtime
1470 hammer2_update_time(&mtime
);
1471 hammer2_inode_modify(tdip
);
1472 tdip
->meta
.mtime
= mtime
;
1474 cache_setunresolved(ap
->a_nch
);
1475 cache_setvp(ap
->a_nch
, ap
->a_vp
);
1477 hammer2_inode_unlock(ip
);
1478 hammer2_inode_unlock(tdip
);
1480 hammer2_trans_done(ip
->pmp
);
1487 * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1489 * The operating system has already ensured that the directory entry
1490 * does not exist and done all appropriate namespace locking.
1494 hammer2_vop_ncreate(struct vop_ncreate_args
*ap
)
1496 hammer2_inode_t
*dip
;
1497 hammer2_inode_t
*nip
;
1498 struct namecache
*ncp
;
1499 const uint8_t *name
;
1505 dip
= VTOI(ap
->a_dvp
);
1506 if (dip
->pmp
->ronly
) {
1511 ncp
= ap
->a_nch
->ncp
;
1512 name
= ncp
->nc_name
;
1513 name_len
= ncp
->nc_nlen
;
1514 hammer2_pfs_memory_wait(dip
->pmp
);
1515 hammer2_trans_init(dip
->pmp
, 0);
1517 inum
= hammer2_trans_newinum(dip
->pmp
);
1520 * Create the actual inode as a hidden file in the iroot, then
1521 * create the directory entry. The creation of the actual inode
1522 * sets its nlinks to 1 which is the value we desire.
1524 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1530 error
= hammer2_dirent_create(dip
, name
, name_len
,
1531 nip
->meta
.inum
, nip
->meta
.type
);
1534 KKASSERT(nip
== NULL
);
1537 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1538 hammer2_inode_unlock(nip
);
1542 * Update dip's mtime
1547 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1548 hammer2_update_time(&mtime
);
1549 hammer2_inode_modify(dip
);
1550 dip
->meta
.mtime
= mtime
;
1551 hammer2_inode_unlock(dip
);
1554 hammer2_trans_done(dip
->pmp
);
1557 cache_setunresolved(ap
->a_nch
);
1558 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1565 * Make a device node (typically a fifo)
1569 hammer2_vop_nmknod(struct vop_nmknod_args
*ap
)
1571 hammer2_inode_t
*dip
;
1572 hammer2_inode_t
*nip
;
1573 struct namecache
*ncp
;
1574 const uint8_t *name
;
1580 dip
= VTOI(ap
->a_dvp
);
1581 if (dip
->pmp
->ronly
) {
1586 ncp
= ap
->a_nch
->ncp
;
1587 name
= ncp
->nc_name
;
1588 name_len
= ncp
->nc_nlen
;
1589 hammer2_pfs_memory_wait(dip
->pmp
);
1590 hammer2_trans_init(dip
->pmp
, 0);
1593 * Create the device inode and then create the directory entry.
1595 inum
= hammer2_trans_newinum(dip
->pmp
);
1596 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1601 error
= hammer2_dirent_create(dip
, name
, name_len
,
1602 nip
->meta
.inum
, nip
->meta
.type
);
1607 KKASSERT(nip
== NULL
);
1610 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1611 hammer2_inode_unlock(nip
);
1615 * Update dip's mtime
1620 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1621 hammer2_update_time(&mtime
);
1622 hammer2_inode_modify(dip
);
1623 dip
->meta
.mtime
= mtime
;
1624 hammer2_inode_unlock(dip
);
1627 hammer2_trans_done(dip
->pmp
);
1630 cache_setunresolved(ap
->a_nch
);
1631 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1638 * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1642 hammer2_vop_nsymlink(struct vop_nsymlink_args
*ap
)
1644 hammer2_inode_t
*dip
;
1645 hammer2_inode_t
*nip
;
1646 struct namecache
*ncp
;
1647 const uint8_t *name
;
1652 dip
= VTOI(ap
->a_dvp
);
1653 if (dip
->pmp
->ronly
)
1656 ncp
= ap
->a_nch
->ncp
;
1657 name
= ncp
->nc_name
;
1658 name_len
= ncp
->nc_nlen
;
1659 hammer2_pfs_memory_wait(dip
->pmp
);
1660 hammer2_trans_init(dip
->pmp
, 0);
1662 ap
->a_vap
->va_type
= VLNK
; /* enforce type */
1665 * Create the softlink as an inode and then create the directory
1668 inum
= hammer2_trans_newinum(dip
->pmp
);
1670 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1675 error
= hammer2_dirent_create(dip
, name
, name_len
,
1676 nip
->meta
.inum
, nip
->meta
.type
);
1681 KKASSERT(nip
== NULL
);
1683 hammer2_trans_done(dip
->pmp
);
1686 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1689 * Build the softlink (~like file data) and finalize the namecache.
1696 bytes
= strlen(ap
->a_target
);
1698 hammer2_inode_unlock(nip
);
1699 bzero(&auio
, sizeof(auio
));
1700 bzero(&aiov
, sizeof(aiov
));
1701 auio
.uio_iov
= &aiov
;
1702 auio
.uio_segflg
= UIO_SYSSPACE
;
1703 auio
.uio_rw
= UIO_WRITE
;
1704 auio
.uio_resid
= bytes
;
1705 auio
.uio_iovcnt
= 1;
1706 auio
.uio_td
= curthread
;
1707 aiov
.iov_base
= ap
->a_target
;
1708 aiov
.iov_len
= bytes
;
1709 error
= hammer2_write_file(nip
, &auio
, IO_APPEND
, 0);
1710 /* XXX handle error */
1713 hammer2_inode_unlock(nip
);
1717 * Update dip's mtime
1722 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1723 hammer2_update_time(&mtime
);
1724 hammer2_inode_modify(dip
);
1725 dip
->meta
.mtime
= mtime
;
1726 hammer2_inode_unlock(dip
);
1729 hammer2_trans_done(dip
->pmp
);
1732 * Finalize namecache
1735 cache_setunresolved(ap
->a_nch
);
1736 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1737 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1743 * hammer2_vop_nremove { nch, dvp, cred }
1747 hammer2_vop_nremove(struct vop_nremove_args
*ap
)
1749 hammer2_xop_unlink_t
*xop
;
1750 hammer2_inode_t
*dip
;
1751 hammer2_inode_t
*ip
;
1752 struct namecache
*ncp
;
1757 dip
= VTOI(ap
->a_dvp
);
1758 if (dip
->pmp
->ronly
) {
1763 ncp
= ap
->a_nch
->ncp
;
1765 hammer2_pfs_memory_wait(dip
->pmp
);
1766 hammer2_trans_init(dip
->pmp
, 0);
1767 hammer2_inode_lock(dip
, 0);
1770 * The unlink XOP unlinks the path from the directory and
1771 * locates and returns the cluster associated with the real inode.
1772 * We have to handle nlinks here on the frontend.
1774 xop
= hammer2_xop_alloc(dip
, HAMMER2_XOP_MODIFYING
);
1775 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1776 isopen
= cache_isopen(ap
->a_nch
);
1778 xop
->dopermanent
= 0;
1779 hammer2_xop_start(&xop
->head
, hammer2_xop_unlink
);
1782 * Collect the real inode and adjust nlinks, destroy the real
1783 * inode if nlinks transitions to 0 and it was the real inode
1784 * (else it has already been removed).
1786 error
= hammer2_xop_collect(&xop
->head
, 0);
1787 hammer2_inode_unlock(dip
);
1790 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1791 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1793 hammer2_inode_unlink_finisher(ip
, isopen
);
1794 hammer2_inode_unlock(ip
);
1797 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1801 * Update dip's mtime
1806 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1807 hammer2_update_time(&mtime
);
1808 hammer2_inode_modify(dip
);
1809 dip
->meta
.mtime
= mtime
;
1810 hammer2_inode_unlock(dip
);
1813 hammer2_inode_run_sideq(dip
->pmp
);
1814 hammer2_trans_done(dip
->pmp
);
1816 cache_unlink(ap
->a_nch
);
1822 * hammer2_vop_nrmdir { nch, dvp, cred }
1826 hammer2_vop_nrmdir(struct vop_nrmdir_args
*ap
)
1828 hammer2_xop_unlink_t
*xop
;
1829 hammer2_inode_t
*dip
;
1830 hammer2_inode_t
*ip
;
1831 struct namecache
*ncp
;
1836 dip
= VTOI(ap
->a_dvp
);
1837 if (dip
->pmp
->ronly
) {
1842 hammer2_pfs_memory_wait(dip
->pmp
);
1843 hammer2_trans_init(dip
->pmp
, 0);
1844 hammer2_inode_lock(dip
, 0);
1846 xop
= hammer2_xop_alloc(dip
, HAMMER2_XOP_MODIFYING
);
1848 ncp
= ap
->a_nch
->ncp
;
1849 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1850 isopen
= cache_isopen(ap
->a_nch
);
1852 xop
->dopermanent
= 0;
1853 hammer2_xop_start(&xop
->head
, hammer2_xop_unlink
);
1856 * Collect the real inode and adjust nlinks, destroy the real
1857 * inode if nlinks transitions to 0 and it was the real inode
1858 * (else it has already been removed).
1860 error
= hammer2_xop_collect(&xop
->head
, 0);
1861 hammer2_inode_unlock(dip
);
1864 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1865 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1867 hammer2_inode_unlink_finisher(ip
, isopen
);
1868 hammer2_inode_unlock(ip
);
1871 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1875 * Update dip's mtime
1880 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1881 hammer2_update_time(&mtime
);
1882 hammer2_inode_modify(dip
);
1883 dip
->meta
.mtime
= mtime
;
1884 hammer2_inode_unlock(dip
);
1887 hammer2_inode_run_sideq(dip
->pmp
);
1888 hammer2_trans_done(dip
->pmp
);
1890 cache_unlink(ap
->a_nch
);
1896 * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1900 hammer2_vop_nrename(struct vop_nrename_args
*ap
)
1902 struct namecache
*fncp
;
1903 struct namecache
*tncp
;
1904 hammer2_inode_t
*fdip
; /* source directory */
1905 hammer2_inode_t
*tdip
; /* target directory */
1906 hammer2_inode_t
*ip
; /* file being renamed */
1907 hammer2_inode_t
*tip
; /* replaced target during rename or NULL */
1908 const uint8_t *fname
;
1910 const uint8_t *tname
;
1917 if (ap
->a_fdvp
->v_mount
!= ap
->a_tdvp
->v_mount
)
1919 if (ap
->a_fdvp
->v_mount
!= ap
->a_fnch
->ncp
->nc_vp
->v_mount
)
1922 fdip
= VTOI(ap
->a_fdvp
); /* source directory */
1923 tdip
= VTOI(ap
->a_tdvp
); /* target directory */
1925 if (fdip
->pmp
->ronly
)
1929 fncp
= ap
->a_fnch
->ncp
; /* entry name in source */
1930 fname
= fncp
->nc_name
;
1931 fname_len
= fncp
->nc_nlen
;
1933 tncp
= ap
->a_tnch
->ncp
; /* entry name in target */
1934 tname
= tncp
->nc_name
;
1935 tname_len
= tncp
->nc_nlen
;
1937 hammer2_pfs_memory_wait(tdip
->pmp
);
1938 hammer2_trans_init(tdip
->pmp
, 0);
1943 ip
= VTOI(fncp
->nc_vp
);
1944 hammer2_inode_ref(ip
); /* extra ref */
1947 * Lookup the target name to determine if a directory entry
1948 * is being overwritten. We only hold related inode locks
1949 * temporarily, the operating system is expected to protect
1950 * against rename races.
1952 tip
= tncp
->nc_vp
? VTOI(tncp
->nc_vp
) : NULL
;
1954 hammer2_inode_ref(tip
); /* extra ref */
1957 * Can return NULL and error == EXDEV if the common parent
1958 * crosses a directory with the xlink flag set.
1960 * For now try to avoid deadlocks with a simple pointer address
1961 * test. (tip) can be NULL.
1965 hammer2_inode_lock(fdip
, 0);
1966 hammer2_inode_lock(tdip
, 0);
1968 hammer2_inode_lock(tdip
, 0);
1969 hammer2_inode_lock(fdip
, 0);
1973 hammer2_inode_lock(ip
, 0);
1974 hammer2_inode_lock(tip
, 0);
1976 hammer2_inode_lock(tip
, 0);
1977 hammer2_inode_lock(ip
, 0);
1980 hammer2_inode_lock(ip
, 0);
1985 * Delete the target namespace.
1987 * REMOVED - NOW FOLDED INTO XOP_NRENAME OPERATION
1990 hammer2_xop_unlink_t
*xop2
;
1991 hammer2_inode_t
*tip
;
1995 * The unlink XOP unlinks the path from the directory and
1996 * locates and returns the cluster associated with the real
1997 * inode. We have to handle nlinks here on the frontend.
1999 xop2
= hammer2_xop_alloc(tdip
, HAMMER2_XOP_MODIFYING
);
2000 hammer2_xop_setname(&xop2
->head
, tname
, tname_len
);
2001 isopen
= cache_isopen(ap
->a_tnch
);
2003 xop2
->dopermanent
= 0;
2004 hammer2_xop_start(&xop2
->head
, hammer2_xop_unlink
);
2007 * Collect the real inode and adjust nlinks, destroy the real
2008 * inode if nlinks transitions to 0 and it was the real inode
2009 * (else it has already been removed).
2011 tnch_error
= hammer2_xop_collect(&xop2
->head
, 0);
2012 /* hammer2_inode_unlock(tdip); */
2014 if (tnch_error
== 0) {
2015 tip
= hammer2_inode_get(tdip
->pmp
, NULL
,
2016 &xop2
->head
.cluster
, -1);
2017 hammer2_xop_retire(&xop2
->head
, HAMMER2_XOPMASK_VOP
);
2019 hammer2_inode_unlink_finisher(tip
, isopen
);
2020 hammer2_inode_unlock(tip
);
2023 hammer2_xop_retire(&xop2
->head
, HAMMER2_XOPMASK_VOP
);
2025 /* hammer2_inode_lock(tdip, 0); */
2027 if (tnch_error
&& tnch_error
!= ENOENT
) {
2036 * Resolve the collision space for (tdip, tname, tname_len)
2038 * tdip must be held exclusively locked to prevent races since
2039 * multiple filenames can end up in the same collision space.
2042 hammer2_xop_scanlhc_t
*sxop
;
2043 hammer2_tid_t lhcbase
;
2045 tlhc
= hammer2_dirhash(tname
, tname_len
);
2047 sxop
= hammer2_xop_alloc(tdip
, HAMMER2_XOP_MODIFYING
);
2049 hammer2_xop_start(&sxop
->head
, hammer2_xop_scanlhc
);
2050 while ((error
= hammer2_xop_collect(&sxop
->head
, 0)) == 0) {
2051 if (tlhc
!= sxop
->head
.cluster
.focus
->bref
.key
)
2055 hammer2_xop_retire(&sxop
->head
, HAMMER2_XOPMASK_VOP
);
2058 if (error
!= ENOENT
)
2063 if ((lhcbase
^ tlhc
) & ~HAMMER2_DIRHASH_LOMASK
) {
2070 * Ready to go, issue the rename to the backend. Note that meta-data
2071 * updates to the related inodes occur separately from the rename
2074 * NOTE: While it is not necessary to update ip->meta.name*, doing
2075 * so aids catastrophic recovery and debugging.
2078 hammer2_xop_nrename_t
*xop4
;
2080 xop4
= hammer2_xop_alloc(fdip
, HAMMER2_XOP_MODIFYING
);
2082 xop4
->ip_key
= ip
->meta
.name_key
;
2083 hammer2_xop_setip2(&xop4
->head
, ip
);
2084 hammer2_xop_setip3(&xop4
->head
, tdip
);
2085 hammer2_xop_setname(&xop4
->head
, fname
, fname_len
);
2086 hammer2_xop_setname2(&xop4
->head
, tname
, tname_len
);
2087 hammer2_xop_start(&xop4
->head
, hammer2_xop_nrename
);
2089 error
= hammer2_xop_collect(&xop4
->head
, 0);
2090 hammer2_xop_retire(&xop4
->head
, HAMMER2_XOPMASK_VOP
);
2092 if (error
== ENOENT
)
2096 * Update inode meta-data.
2098 * WARNING! The in-memory inode (ip) structure does not
2099 * maintain a copy of the inode's filename buffer.
2102 (ip
->meta
.name_key
& HAMMER2_DIRHASH_VISIBLE
)) {
2103 hammer2_inode_modify(ip
);
2104 ip
->meta
.name_len
= tname_len
;
2105 ip
->meta
.name_key
= tlhc
;
2108 hammer2_inode_modify(ip
);
2109 ip
->meta
.iparent
= tdip
->meta
.inum
;
2117 * If no error, the backend has replaced the target directory entry.
2118 * We must adjust nlinks on the original replace target if it exists.
2120 if (error
== 0 && tip
) {
2123 isopen
= cache_isopen(ap
->a_tnch
);
2124 hammer2_inode_unlink_finisher(tip
, isopen
);
2128 * Update directory mtimes to represent the something changed.
2130 if (update_fdip
|| update_tdip
) {
2133 hammer2_update_time(&mtime
);
2135 hammer2_inode_modify(fdip
);
2136 fdip
->meta
.mtime
= mtime
;
2139 hammer2_inode_modify(tdip
);
2140 tdip
->meta
.mtime
= mtime
;
2144 hammer2_inode_unlock(tip
);
2145 hammer2_inode_drop(tip
);
2147 hammer2_inode_unlock(ip
);
2148 hammer2_inode_unlock(tdip
);
2149 hammer2_inode_unlock(fdip
);
2150 hammer2_inode_drop(ip
);
2151 hammer2_inode_run_sideq(fdip
->pmp
);
2153 hammer2_trans_done(tdip
->pmp
);
2156 * Issue the namecache update after unlocking all the internal
2157 * hammer structures, otherwise we might deadlock.
2159 if (error
== 0 && tip
) {
2160 cache_unlink(ap
->a_tnch
);
2161 cache_setunresolved(ap
->a_tnch
);
2164 cache_rename(ap
->a_fnch
, ap
->a_tnch
);
2171 * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2175 hammer2_vop_ioctl(struct vop_ioctl_args
*ap
)
2177 hammer2_inode_t
*ip
;
2181 ip
= VTOI(ap
->a_vp
);
2183 error
= hammer2_ioctl(ip
, ap
->a_command
, (void *)ap
->a_data
,
2184 ap
->a_fflag
, ap
->a_cred
);
2191 hammer2_vop_mountctl(struct vop_mountctl_args
*ap
)
2199 case (MOUNTCTL_SET_EXPORT
):
2200 mp
= ap
->a_head
.a_ops
->head
.vv_mount
;
2203 if (ap
->a_ctllen
!= sizeof(struct export_args
))
2206 rc
= vfs_export(mp
, &pmp
->export
,
2207 (const struct export_args
*)ap
->a_ctl
);
2210 rc
= vop_stdmountctl(ap
);
2220 static void filt_hammer2detach(struct knote
*kn
);
2221 static int filt_hammer2read(struct knote
*kn
, long hint
);
2222 static int filt_hammer2write(struct knote
*kn
, long hint
);
2223 static int filt_hammer2vnode(struct knote
*kn
, long hint
);
2225 static struct filterops hammer2read_filtops
=
2226 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2227 NULL
, filt_hammer2detach
, filt_hammer2read
};
2228 static struct filterops hammer2write_filtops
=
2229 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2230 NULL
, filt_hammer2detach
, filt_hammer2write
};
2231 static struct filterops hammer2vnode_filtops
=
2232 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2233 NULL
, filt_hammer2detach
, filt_hammer2vnode
};
2237 hammer2_vop_kqfilter(struct vop_kqfilter_args
*ap
)
2239 struct vnode
*vp
= ap
->a_vp
;
2240 struct knote
*kn
= ap
->a_kn
;
2242 switch (kn
->kn_filter
) {
2244 kn
->kn_fop
= &hammer2read_filtops
;
2247 kn
->kn_fop
= &hammer2write_filtops
;
2250 kn
->kn_fop
= &hammer2vnode_filtops
;
2253 return (EOPNOTSUPP
);
2256 kn
->kn_hook
= (caddr_t
)vp
;
2258 knote_insert(&vp
->v_pollinfo
.vpi_kqinfo
.ki_note
, kn
);
2264 filt_hammer2detach(struct knote
*kn
)
2266 struct vnode
*vp
= (void *)kn
->kn_hook
;
2268 knote_remove(&vp
->v_pollinfo
.vpi_kqinfo
.ki_note
, kn
);
2272 filt_hammer2read(struct knote
*kn
, long hint
)
2274 struct vnode
*vp
= (void *)kn
->kn_hook
;
2275 hammer2_inode_t
*ip
= VTOI(vp
);
2278 if (hint
== NOTE_REVOKE
) {
2279 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
| EV_ONESHOT
);
2282 off
= ip
->meta
.size
- kn
->kn_fp
->f_offset
;
2283 kn
->kn_data
= (off
< INTPTR_MAX
) ? off
: INTPTR_MAX
;
2284 if (kn
->kn_sfflags
& NOTE_OLDAPI
)
2286 return (kn
->kn_data
!= 0);
2291 filt_hammer2write(struct knote
*kn
, long hint
)
2293 if (hint
== NOTE_REVOKE
)
2294 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
| EV_ONESHOT
);
2300 filt_hammer2vnode(struct knote
*kn
, long hint
)
2302 if (kn
->kn_sfflags
& hint
)
2303 kn
->kn_fflags
|= hint
;
2304 if (hint
== NOTE_REVOKE
) {
2305 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
);
2308 return (kn
->kn_fflags
!= 0);
2316 hammer2_vop_markatime(struct vop_markatime_args
*ap
)
2318 hammer2_inode_t
*ip
;
2331 hammer2_vop_fifokqfilter(struct vop_kqfilter_args
*ap
)
2335 error
= VOCALL(&fifo_vnode_vops
, &ap
->a_head
);
2337 error
= hammer2_vop_kqfilter(ap
);
2344 struct vop_ops hammer2_vnode_vops
= {
2345 .vop_default
= vop_defaultop
,
2346 .vop_fsync
= hammer2_vop_fsync
,
2347 .vop_getpages
= vop_stdgetpages
,
2348 .vop_putpages
= vop_stdputpages
,
2349 .vop_access
= hammer2_vop_access
,
2350 .vop_advlock
= hammer2_vop_advlock
,
2351 .vop_close
= hammer2_vop_close
,
2352 .vop_nlink
= hammer2_vop_nlink
,
2353 .vop_ncreate
= hammer2_vop_ncreate
,
2354 .vop_nsymlink
= hammer2_vop_nsymlink
,
2355 .vop_nremove
= hammer2_vop_nremove
,
2356 .vop_nrmdir
= hammer2_vop_nrmdir
,
2357 .vop_nrename
= hammer2_vop_nrename
,
2358 .vop_getattr
= hammer2_vop_getattr
,
2359 .vop_setattr
= hammer2_vop_setattr
,
2360 .vop_readdir
= hammer2_vop_readdir
,
2361 .vop_readlink
= hammer2_vop_readlink
,
2362 .vop_getpages
= vop_stdgetpages
,
2363 .vop_putpages
= vop_stdputpages
,
2364 .vop_read
= hammer2_vop_read
,
2365 .vop_write
= hammer2_vop_write
,
2366 .vop_open
= hammer2_vop_open
,
2367 .vop_inactive
= hammer2_vop_inactive
,
2368 .vop_reclaim
= hammer2_vop_reclaim
,
2369 .vop_nresolve
= hammer2_vop_nresolve
,
2370 .vop_nlookupdotdot
= hammer2_vop_nlookupdotdot
,
2371 .vop_nmkdir
= hammer2_vop_nmkdir
,
2372 .vop_nmknod
= hammer2_vop_nmknod
,
2373 .vop_ioctl
= hammer2_vop_ioctl
,
2374 .vop_mountctl
= hammer2_vop_mountctl
,
2375 .vop_bmap
= hammer2_vop_bmap
,
2376 .vop_strategy
= hammer2_vop_strategy
,
2377 .vop_kqfilter
= hammer2_vop_kqfilter
2380 struct vop_ops hammer2_spec_vops
= {
2381 .vop_default
= vop_defaultop
,
2382 .vop_fsync
= hammer2_vop_fsync
,
2383 .vop_read
= vop_stdnoread
,
2384 .vop_write
= vop_stdnowrite
,
2385 .vop_access
= hammer2_vop_access
,
2386 .vop_close
= hammer2_vop_close
,
2387 .vop_markatime
= hammer2_vop_markatime
,
2388 .vop_getattr
= hammer2_vop_getattr
,
2389 .vop_inactive
= hammer2_vop_inactive
,
2390 .vop_reclaim
= hammer2_vop_reclaim
,
2391 .vop_setattr
= hammer2_vop_setattr
2394 struct vop_ops hammer2_fifo_vops
= {
2395 .vop_default
= fifo_vnoperate
,
2396 .vop_fsync
= hammer2_vop_fsync
,
2398 .vop_read
= hammer2_vop_fiforead
,
2399 .vop_write
= hammer2_vop_fifowrite
,
2401 .vop_access
= hammer2_vop_access
,
2403 .vop_close
= hammer2_vop_fifoclose
,
2405 .vop_markatime
= hammer2_vop_markatime
,
2406 .vop_getattr
= hammer2_vop_getattr
,
2407 .vop_inactive
= hammer2_vop_inactive
,
2408 .vop_reclaim
= hammer2_vop_reclaim
,
2409 .vop_setattr
= hammer2_vop_setattr
,
2410 .vop_kqfilter
= hammer2_vop_fifokqfilter