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
) {
321 if (vap
->va_bytes
< chain
->bref
.data_count
)
322 vap
->va_bytes
= chain
->bref
.data_count
;
326 vap
->va_type
= hammer2_get_vtype(ip
->meta
.type
);
328 vap
->va_uid_uuid
= ip
->meta
.uid
;
329 vap
->va_gid_uuid
= ip
->meta
.gid
;
330 vap
->va_vaflags
= VA_UID_UUID_VALID
| VA_GID_UUID_VALID
|
333 hammer2_inode_unlock(ip
);
341 hammer2_vop_setattr(struct vop_setattr_args
*ap
)
353 hammer2_update_time(&ctime
);
357 if (ip
->pmp
->ronly
) {
362 hammer2_pfs_memory_wait(ip
->pmp
);
363 hammer2_trans_init(ip
->pmp
, 0);
364 hammer2_inode_lock(ip
, 0);
367 if (vap
->va_flags
!= VNOVAL
) {
370 flags
= ip
->meta
.uflags
;
371 error
= vop_helper_setattr_flags(&flags
, vap
->va_flags
,
372 hammer2_to_unix_xid(&ip
->meta
.uid
),
375 if (ip
->meta
.uflags
!= flags
) {
376 hammer2_inode_modify(ip
);
377 ip
->meta
.uflags
= flags
;
378 ip
->meta
.ctime
= ctime
;
379 kflags
|= NOTE_ATTRIB
;
381 if (ip
->meta
.uflags
& (IMMUTABLE
| APPEND
)) {
388 if (ip
->meta
.uflags
& (IMMUTABLE
| APPEND
)) {
392 if (vap
->va_uid
!= (uid_t
)VNOVAL
|| vap
->va_gid
!= (gid_t
)VNOVAL
) {
393 mode_t cur_mode
= ip
->meta
.mode
;
394 uid_t cur_uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
395 gid_t cur_gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
399 error
= vop_helper_chown(ap
->a_vp
, vap
->va_uid
, vap
->va_gid
,
401 &cur_uid
, &cur_gid
, &cur_mode
);
403 hammer2_guid_to_uuid(&uuid_uid
, cur_uid
);
404 hammer2_guid_to_uuid(&uuid_gid
, cur_gid
);
405 if (bcmp(&uuid_uid
, &ip
->meta
.uid
, sizeof(uuid_uid
)) ||
406 bcmp(&uuid_gid
, &ip
->meta
.gid
, sizeof(uuid_gid
)) ||
407 ip
->meta
.mode
!= cur_mode
409 hammer2_inode_modify(ip
);
410 ip
->meta
.uid
= uuid_uid
;
411 ip
->meta
.gid
= uuid_gid
;
412 ip
->meta
.mode
= cur_mode
;
413 ip
->meta
.ctime
= ctime
;
415 kflags
|= NOTE_ATTRIB
;
422 if (vap
->va_size
!= VNOVAL
&& ip
->meta
.size
!= vap
->va_size
) {
425 if (vap
->va_size
== ip
->meta
.size
)
427 if (vap
->va_size
< ip
->meta
.size
) {
428 hammer2_mtx_ex(&ip
->truncate_lock
);
429 hammer2_truncate_file(ip
, vap
->va_size
);
430 hammer2_mtx_unlock(&ip
->truncate_lock
);
432 hammer2_extend_file(ip
, vap
->va_size
);
434 hammer2_inode_modify(ip
);
435 ip
->meta
.mtime
= ctime
;
443 /* atime not supported */
444 if (vap
->va_atime
.tv_sec
!= VNOVAL
) {
445 hammer2_inode_modify(ip
);
446 ip
->meta
.atime
= hammer2_timespec_to_time(&vap
->va_atime
);
447 kflags
|= NOTE_ATTRIB
;
450 if (vap
->va_mode
!= (mode_t
)VNOVAL
) {
451 mode_t cur_mode
= ip
->meta
.mode
;
452 uid_t cur_uid
= hammer2_to_unix_xid(&ip
->meta
.uid
);
453 gid_t cur_gid
= hammer2_to_unix_xid(&ip
->meta
.gid
);
455 error
= vop_helper_chmod(ap
->a_vp
, vap
->va_mode
, ap
->a_cred
,
456 cur_uid
, cur_gid
, &cur_mode
);
457 if (error
== 0 && ip
->meta
.mode
!= cur_mode
) {
458 hammer2_inode_modify(ip
);
459 ip
->meta
.mode
= cur_mode
;
460 ip
->meta
.ctime
= ctime
;
461 kflags
|= NOTE_ATTRIB
;
465 if (vap
->va_mtime
.tv_sec
!= VNOVAL
) {
466 hammer2_inode_modify(ip
);
467 ip
->meta
.mtime
= hammer2_timespec_to_time(&vap
->va_mtime
);
468 kflags
|= NOTE_ATTRIB
;
473 * If a truncation occurred we must call inode_fsync() now in order
474 * to trim the related data chains, otherwise a later expansion can
477 * If an extend occured that changed the DIRECTDATA state, we must
478 * call inode_fsync now in order to prepare the inode's indirect
481 if (ip
->flags
& HAMMER2_INODE_RESIZED
)
482 hammer2_inode_chain_sync(ip
);
487 hammer2_inode_unlock(ip
);
488 hammer2_trans_done(ip
->pmp
);
489 hammer2_knote(ip
->vp
, kflags
);
497 hammer2_vop_readdir(struct vop_readdir_args
*ap
)
499 hammer2_xop_readdir_t
*xop
;
500 hammer2_blockref_t bref
;
517 saveoff
= uio
->uio_offset
;
522 * Setup cookies directory entry cookies if requested
524 if (ap
->a_ncookies
) {
525 ncookies
= uio
->uio_resid
/ 16 + 1;
528 cookies
= kmalloc(ncookies
* sizeof(off_t
), M_TEMP
, M_WAITOK
);
535 hammer2_inode_lock(ip
, HAMMER2_RESOLVE_SHARED
);
538 * Handle artificial entries. To ensure that only positive 64 bit
539 * quantities are returned to userland we always strip off bit 63.
540 * The hash code is designed such that codes 0x0000-0x7FFF are not
541 * used, allowing us to use these codes for articial entries.
543 * Entry 0 is used for '.' and entry 1 is used for '..'. Do not
544 * allow '..' to cross the mount point into (e.g.) the super-root.
547 inum
= ip
->meta
.inum
& HAMMER2_DIRHASH_USERMSK
;
548 r
= vop_write_dirent(&error
, uio
, inum
, DT_DIR
, 1, ".");
552 cookies
[cookie_index
] = saveoff
;
555 if (cookie_index
== ncookies
)
561 * Be careful with lockorder when accessing ".."
563 * (ip is the current dir. xip is the parent dir).
565 inum
= ip
->meta
.inum
& HAMMER2_DIRHASH_USERMSK
;
566 if (ip
!= ip
->pmp
->iroot
)
567 inum
= ip
->meta
.iparent
& HAMMER2_DIRHASH_USERMSK
;
568 r
= vop_write_dirent(&error
, uio
, inum
, DT_DIR
, 2, "..");
572 cookies
[cookie_index
] = saveoff
;
575 if (cookie_index
== ncookies
)
579 lkey
= saveoff
| HAMMER2_DIRHASH_VISIBLE
;
580 if (hammer2_debug
& 0x0020)
581 kprintf("readdir: lkey %016jx\n", lkey
);
586 * Use XOP for cluster scan.
588 * parent is the inode cluster, already locked for us. Don't
589 * double lock shared locks as this will screw up upgrades.
591 xop
= hammer2_xop_alloc(ip
, 0);
593 hammer2_xop_start(&xop
->head
, hammer2_xop_readdir
);
596 const hammer2_inode_data_t
*ripdata
;
598 error
= hammer2_xop_collect(&xop
->head
, 0);
601 if (cookie_index
== ncookies
)
603 if (hammer2_debug
& 0x0020)
604 kprintf("cluster chain %p %p\n",
605 xop
->head
.cluster
.focus
,
606 (xop
->head
.cluster
.focus
?
607 xop
->head
.cluster
.focus
->data
: (void *)-1));
608 ripdata
= &hammer2_cluster_rdata(&xop
->head
.cluster
)->ipdata
;
609 hammer2_cluster_bref(&xop
->head
.cluster
, &bref
);
610 if (bref
.type
== HAMMER2_BREF_TYPE_INODE
) {
611 dtype
= hammer2_get_dtype(ripdata
);
612 saveoff
= bref
.key
& HAMMER2_DIRHASH_USERMSK
;
613 r
= vop_write_dirent(&error
, uio
,
615 HAMMER2_DIRHASH_USERMSK
,
617 ripdata
->meta
.name_len
,
622 cookies
[cookie_index
] = saveoff
;
625 /* XXX chain error */
626 kprintf("bad chain type readdir %d\n", bref
.type
);
629 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
630 if (error
== ENOENT
) {
633 saveoff
= (hammer2_key_t
)-1;
635 saveoff
= bref
.key
& HAMMER2_DIRHASH_USERMSK
;
638 hammer2_inode_unlock(ip
);
640 *ap
->a_eofflag
= eofflag
;
641 if (hammer2_debug
& 0x0020)
642 kprintf("readdir: done at %016jx\n", saveoff
);
643 uio
->uio_offset
= saveoff
& ~HAMMER2_DIRHASH_VISIBLE
;
644 if (error
&& cookie_index
== 0) {
646 kfree(cookies
, M_TEMP
);
648 *ap
->a_cookies
= NULL
;
652 *ap
->a_ncookies
= cookie_index
;
653 *ap
->a_cookies
= cookies
;
661 * hammer2_vop_readlink { vp, uio, cred }
665 hammer2_vop_readlink(struct vop_readlink_args
*ap
)
672 if (vp
->v_type
!= VLNK
)
676 error
= hammer2_read_file(ip
, ap
->a_uio
, 0);
682 hammer2_vop_read(struct vop_read_args
*ap
)
692 * Read operations supported on this vnode?
695 if (vp
->v_type
!= VREG
)
705 seqcount
= ap
->a_ioflag
>> 16;
706 bigread
= (uio
->uio_resid
> 100 * 1024 * 1024);
708 error
= hammer2_read_file(ip
, uio
, seqcount
);
714 hammer2_vop_write(struct vop_write_args
*ap
)
724 * Read operations supported on this vnode?
727 if (vp
->v_type
!= VREG
)
736 if (ip
->pmp
->ronly
) {
740 seqcount
= ap
->a_ioflag
>> 16;
743 * Check resource limit
745 if (uio
->uio_resid
> 0 && (td
= uio
->uio_td
) != NULL
&& td
->td_proc
&&
746 uio
->uio_offset
+ uio
->uio_resid
>
747 td
->td_proc
->p_rlimit
[RLIMIT_FSIZE
].rlim_cur
) {
748 lwpsignal(td
->td_proc
, td
->td_lwp
, SIGXFSZ
);
753 * The transaction interlocks against flushes initiations
754 * (note: but will run concurrently with the actual flush).
756 hammer2_trans_init(ip
->pmp
, 0);
757 error
= hammer2_write_file(ip
, uio
, ap
->a_ioflag
, seqcount
);
758 hammer2_trans_done(ip
->pmp
);
764 * Perform read operations on a file or symlink given an UNLOCKED
767 * The passed ip is not locked.
771 hammer2_read_file(hammer2_inode_t
*ip
, struct uio
*uio
, int seqcount
)
782 * WARNING! Assumes that the kernel interlocks size changes at the
785 hammer2_mtx_sh(&ip
->lock
);
786 hammer2_mtx_sh(&ip
->truncate_lock
);
787 size
= ip
->meta
.size
;
788 hammer2_mtx_unlock(&ip
->lock
);
790 while (uio
->uio_resid
> 0 && uio
->uio_offset
< size
) {
797 lblksize
= hammer2_calc_logical(ip
, uio
->uio_offset
,
801 error
= cluster_read(ip
->vp
, leof
, lbase
, lblksize
,
802 uio
->uio_resid
, seqcount
* BKVASIZE
,
805 if (uio
->uio_segflg
== UIO_NOCOPY
) {
806 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
807 if (bp
->b_flags
& B_CACHE
) {
810 if (bp
->b_xio
.xio_npages
!= 16)
811 kprintf("NPAGES BAD\n");
812 for (i
= 0; i
< bp
->b_xio
.xio_npages
; ++i
) {
814 m
= bp
->b_xio
.xio_pages
[i
];
815 if (m
== NULL
|| m
->valid
== 0) {
816 kprintf("bp %016jx %016jx pg %d inv",
819 kprintf("m->object %p/%p", m
->object
, ip
->vp
->v_object
);
825 kprintf("b_flags %08x, b_error %d\n", bp
->b_flags
, bp
->b_error
);
829 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
835 loff
= (int)(uio
->uio_offset
- lbase
);
837 if (n
> uio
->uio_resid
)
839 if (n
> size
- uio
->uio_offset
)
840 n
= (int)(size
- uio
->uio_offset
);
841 bp
->b_flags
|= B_AGE
;
842 uiomovebp(bp
, (char *)bp
->b_data
+ loff
, n
, uio
);
845 hammer2_mtx_unlock(&ip
->truncate_lock
);
851 * Write to the file represented by the inode via the logical buffer cache.
852 * The inode may represent a regular file or a symlink.
854 * The inode must not be locked.
858 hammer2_write_file(hammer2_inode_t
*ip
, struct uio
*uio
,
859 int ioflag
, int seqcount
)
861 hammer2_key_t old_eof
;
862 hammer2_key_t new_eof
;
871 * WARNING! Assumes that the kernel interlocks size changes at the
874 hammer2_mtx_ex(&ip
->lock
);
875 hammer2_mtx_sh(&ip
->truncate_lock
);
876 if (ioflag
& IO_APPEND
)
877 uio
->uio_offset
= ip
->meta
.size
;
878 old_eof
= ip
->meta
.size
;
881 * Extend the file if necessary. If the write fails at some point
882 * we will truncate it back down to cover as much as we were able
885 * Doing this now makes it easier to calculate buffer sizes in
892 if (uio
->uio_offset
+ uio
->uio_resid
> old_eof
) {
893 new_eof
= uio
->uio_offset
+ uio
->uio_resid
;
895 hammer2_extend_file(ip
, new_eof
);
896 kflags
|= NOTE_EXTEND
;
900 hammer2_mtx_unlock(&ip
->lock
);
905 while (uio
->uio_resid
> 0) {
914 * Don't allow the buffer build to blow out the buffer
917 if ((ioflag
& IO_RECURSE
) == 0)
918 bwillwrite(HAMMER2_PBUFSIZE
);
921 * This nominally tells us how much we can cluster and
922 * what the logical buffer size needs to be. Currently
923 * we don't try to cluster the write and just handle one
926 lblksize
= hammer2_calc_logical(ip
, uio
->uio_offset
,
928 loff
= (int)(uio
->uio_offset
- lbase
);
930 KKASSERT(lblksize
<= 65536);
933 * Calculate bytes to copy this transfer and whether the
934 * copy completely covers the buffer or not.
938 if (n
> uio
->uio_resid
) {
940 if (loff
== lbase
&& uio
->uio_offset
+ n
== new_eof
)
948 if (lbase
>= new_eof
)
954 if (uio
->uio_segflg
== UIO_NOCOPY
) {
956 * Issuing a write with the same data backing the
957 * buffer. Instantiate the buffer to collect the
958 * backing vm pages, then read-in any missing bits.
960 * This case is used by vop_stdputpages().
962 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
963 if ((bp
->b_flags
& B_CACHE
) == 0) {
965 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
967 } else if (trivial
) {
969 * Even though we are entirely overwriting the buffer
970 * we may still have to zero it out to avoid a
971 * mmap/write visibility issue.
973 bp
= getblk(ip
->vp
, lbase
, lblksize
, GETBLK_BHEAVY
, 0);
974 if ((bp
->b_flags
& B_CACHE
) == 0)
978 * Partial overwrite, read in any missing bits then
979 * replace the portion being written.
981 * (The strategy code will detect zero-fill physical
982 * blocks for this case).
984 error
= bread(ip
->vp
, lbase
, lblksize
, &bp
);
995 * Ok, copy the data in
997 error
= uiomovebp(bp
, bp
->b_data
+ loff
, n
, uio
);
998 kflags
|= NOTE_WRITE
;
1006 * WARNING: Pageout daemon will issue UIO_NOCOPY writes
1007 * with IO_SYNC or IO_ASYNC set. These writes
1008 * must be handled as the pageout daemon expects.
1010 * NOTE! H2 relies on cluster_write() here because it
1011 * cannot preallocate disk blocks at the logical
1012 * level due to not knowing what the compression
1013 * size will be at this time.
1015 * We must use cluster_write() here and we depend
1016 * on the write-behind feature to flush buffers
1017 * appropriately. If we let the buffer daemons do
1018 * it the block allocations will be all over the
1021 if (ioflag
& IO_SYNC
) {
1023 } else if ((ioflag
& IO_DIRECT
) && endofblk
) {
1025 } else if (ioflag
& IO_ASYNC
) {
1027 } else if (ip
->vp
->v_mount
->mnt_flag
& MNT_NOCLUSTERW
) {
1031 bp
->b_flags
|= B_CLUSTEROK
;
1032 cluster_write(bp
, new_eof
, lblksize
, seqcount
);
1034 bp
->b_flags
|= B_CLUSTEROK
;
1041 * Cleanup. If we extended the file EOF but failed to write through
1042 * the entire write is a failure and we have to back-up.
1044 if (error
&& new_eof
!= old_eof
) {
1045 hammer2_mtx_unlock(&ip
->truncate_lock
);
1046 hammer2_mtx_ex(&ip
->lock
);
1047 hammer2_mtx_ex(&ip
->truncate_lock
);
1048 hammer2_truncate_file(ip
, old_eof
);
1049 if (ip
->flags
& HAMMER2_INODE_MODIFIED
)
1050 hammer2_inode_chain_sync(ip
);
1051 hammer2_mtx_unlock(&ip
->lock
);
1052 } else if (modified
) {
1053 hammer2_mtx_ex(&ip
->lock
);
1054 hammer2_inode_modify(ip
);
1055 hammer2_update_time(&ip
->meta
.mtime
);
1056 if (ip
->flags
& HAMMER2_INODE_MODIFIED
)
1057 hammer2_inode_chain_sync(ip
);
1058 hammer2_mtx_unlock(&ip
->lock
);
1059 hammer2_knote(ip
->vp
, kflags
);
1061 hammer2_trans_assert_strategy(ip
->pmp
);
1062 hammer2_mtx_unlock(&ip
->truncate_lock
);
1068 * Truncate the size of a file. The inode must not be locked.
1070 * We must unconditionally set HAMMER2_INODE_RESIZED to properly
1071 * ensure that any on-media data beyond the new file EOF has been destroyed.
1073 * WARNING: nvtruncbuf() can only be safely called without the inode lock
1074 * held due to the way our write thread works. If the truncation
1075 * occurs in the middle of a buffer, nvtruncbuf() is responsible
1076 * for dirtying that buffer and zeroing out trailing bytes.
1078 * WARNING! Assumes that the kernel interlocks size changes at the
1081 * WARNING! Caller assumes responsibility for removing dead blocks
1082 * if INODE_RESIZED is set.
1086 hammer2_truncate_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
)
1088 hammer2_key_t lbase
;
1092 hammer2_mtx_unlock(&ip
->lock
);
1094 nblksize
= hammer2_calc_logical(ip
, nsize
, &lbase
, NULL
);
1095 nvtruncbuf(ip
->vp
, nsize
,
1096 nblksize
, (int)nsize
& (nblksize
- 1),
1099 hammer2_mtx_ex(&ip
->lock
);
1100 KKASSERT((ip
->flags
& HAMMER2_INODE_RESIZED
) == 0);
1101 ip
->osize
= ip
->meta
.size
;
1102 ip
->meta
.size
= nsize
;
1103 atomic_set_int(&ip
->flags
, HAMMER2_INODE_RESIZED
);
1104 hammer2_inode_modify(ip
);
1109 * Extend the size of a file. The inode must not be locked.
1111 * Even though the file size is changing, we do not have to set the
1112 * INODE_RESIZED bit unless the file size crosses the EMBEDDED_BYTES
1113 * boundary. When this occurs a hammer2_inode_chain_sync() is required
1114 * to prepare the inode cluster's indirect block table, otherwise
1115 * async execution of the strategy code will implode on us.
1117 * WARNING! Assumes that the kernel interlocks size changes at the
1120 * WARNING! Caller assumes responsibility for transitioning out
1121 * of the inode DIRECTDATA mode if INODE_RESIZED is set.
1125 hammer2_extend_file(hammer2_inode_t
*ip
, hammer2_key_t nsize
)
1127 hammer2_key_t lbase
;
1128 hammer2_key_t osize
;
1134 KKASSERT((ip
->flags
& HAMMER2_INODE_RESIZED
) == 0);
1135 hammer2_inode_modify(ip
);
1136 osize
= ip
->meta
.size
;
1138 ip
->meta
.size
= nsize
;
1140 if (osize
<= HAMMER2_EMBEDDED_BYTES
&& nsize
> HAMMER2_EMBEDDED_BYTES
) {
1141 atomic_set_int(&ip
->flags
, HAMMER2_INODE_RESIZED
);
1142 hammer2_inode_chain_sync(ip
);
1145 hammer2_mtx_unlock(&ip
->lock
);
1147 oblksize
= hammer2_calc_logical(ip
, osize
, &lbase
, NULL
);
1148 nblksize
= hammer2_calc_logical(ip
, nsize
, &lbase
, NULL
);
1154 hammer2_mtx_ex(&ip
->lock
);
1161 hammer2_vop_nresolve(struct vop_nresolve_args
*ap
)
1163 hammer2_xop_nresolve_t
*xop
;
1164 hammer2_inode_t
*ip
;
1165 hammer2_inode_t
*dip
;
1166 struct namecache
*ncp
;
1171 dip
= VTOI(ap
->a_dvp
);
1172 xop
= hammer2_xop_alloc(dip
, 0);
1174 ncp
= ap
->a_nch
->ncp
;
1175 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1178 * Note: In DragonFly the kernel handles '.' and '..'.
1180 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1181 hammer2_xop_start(&xop
->head
, hammer2_xop_nresolve
);
1183 error
= hammer2_xop_collect(&xop
->head
, 0);
1187 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1189 hammer2_inode_unlock(dip
);
1192 * Acquire the related vnode
1194 * NOTE: For error processing, only ENOENT resolves the namecache
1195 * entry to NULL, otherwise we just return the error and
1196 * leave the namecache unresolved.
1198 * NOTE: multiple hammer2_inode structures can be aliased to the
1199 * same chain element, for example for hardlinks. This
1200 * use case does not 'reattach' inode associations that
1201 * might already exist, but always allocates a new one.
1203 * WARNING: inode structure is locked exclusively via inode_get
1204 * but chain was locked shared. inode_unlock()
1205 * will handle it properly.
1208 vp
= hammer2_igetv(ip
, &error
);
1211 cache_setvp(ap
->a_nch
, vp
);
1212 } else if (error
== ENOENT
) {
1213 cache_setvp(ap
->a_nch
, NULL
);
1215 hammer2_inode_unlock(ip
);
1218 * The vp should not be released until after we've disposed
1219 * of our locks, because it might cause vop_inactive() to
1226 cache_setvp(ap
->a_nch
, NULL
);
1228 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1229 KASSERT(error
|| ap
->a_nch
->ncp
->nc_vp
!= NULL
,
1230 ("resolve error %d/%p ap %p\n",
1231 error
, ap
->a_nch
->ncp
->nc_vp
, ap
));
1239 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args
*ap
)
1241 hammer2_inode_t
*dip
;
1246 dip
= VTOI(ap
->a_dvp
);
1247 inum
= dip
->meta
.iparent
;
1251 error
= hammer2_vfs_vget(ap
->a_dvp
->v_mount
, NULL
,
1262 hammer2_vop_nmkdir(struct vop_nmkdir_args
*ap
)
1264 hammer2_inode_t
*dip
;
1265 hammer2_inode_t
*nip
;
1266 struct namecache
*ncp
;
1267 const uint8_t *name
;
1273 dip
= VTOI(ap
->a_dvp
);
1274 if (dip
->pmp
->ronly
) {
1279 ncp
= ap
->a_nch
->ncp
;
1280 name
= ncp
->nc_name
;
1281 name_len
= ncp
->nc_nlen
;
1283 hammer2_pfs_memory_wait(dip
->pmp
);
1284 hammer2_trans_init(dip
->pmp
, 0);
1286 inum
= hammer2_trans_newinum(dip
->pmp
);
1289 * Create the actual inode as a hidden file in the iroot, then
1290 * create the directory entry as a hardlink to it. The creation
1291 * of the actual inode sets its nlinks to 1 which is the value
1294 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1299 hammer2_inode_create(dip
, dip
, NULL
, NULL
,
1302 HAMMER2_OBJTYPE_HARDLINK
, nip
->meta
.type
,
1307 KKASSERT(nip
== NULL
);
1310 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1311 hammer2_inode_unlock(nip
);
1315 * Update dip's mtime
1320 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1321 hammer2_update_time(&mtime
);
1322 hammer2_inode_modify(dip
);
1323 dip
->meta
.mtime
= mtime
;
1324 hammer2_inode_unlock(dip
);
1327 hammer2_trans_done(dip
->pmp
);
1330 cache_setunresolved(ap
->a_nch
);
1331 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1339 hammer2_vop_open(struct vop_open_args
*ap
)
1341 return vop_stdopen(ap
);
1345 * hammer2_vop_advlock { vp, id, op, fl, flags }
1349 hammer2_vop_advlock(struct vop_advlock_args
*ap
)
1351 hammer2_inode_t
*ip
= VTOI(ap
->a_vp
);
1354 size
= ip
->meta
.size
;
1355 return (lf_advlock(ap
, &ip
->advlock
, size
));
1360 hammer2_vop_close(struct vop_close_args
*ap
)
1362 return vop_stdclose(ap
);
1366 * hammer2_vop_nlink { nch, dvp, vp, cred }
1368 * Create a hardlink from (vp) to {dvp, nch}.
1372 hammer2_vop_nlink(struct vop_nlink_args
*ap
)
1374 hammer2_inode_t
*tdip
; /* target directory to create link in */
1375 hammer2_inode_t
*ip
; /* inode we are hardlinking to */
1376 struct namecache
*ncp
;
1377 const uint8_t *name
;
1381 if (ap
->a_dvp
->v_mount
!= ap
->a_vp
->v_mount
)
1385 tdip
= VTOI(ap
->a_dvp
);
1386 if (tdip
->pmp
->ronly
) {
1391 ncp
= ap
->a_nch
->ncp
;
1392 name
= ncp
->nc_name
;
1393 name_len
= ncp
->nc_nlen
;
1396 * ip represents the file being hardlinked. The file could be a
1397 * normal file or a hardlink target if it has already been hardlinked.
1398 * (with the new semantics, it will almost always be a hardlink
1401 * Bump nlinks and potentially also create or move the hardlink
1402 * target in the parent directory common to (ip) and (tdip). The
1403 * consolidation code can modify ip->cluster. The returned cluster
1406 ip
= VTOI(ap
->a_vp
);
1407 KASSERT(ip
->pmp
, ("ip->pmp is NULL %p %p", ip
, ip
->pmp
));
1408 hammer2_pfs_memory_wait(ip
->pmp
);
1409 hammer2_trans_init(ip
->pmp
, 0);
1412 * Target should be an indexed inode or there's no way we will ever
1413 * be able to find it!
1415 KKASSERT((ip
->meta
.name_key
& HAMMER2_DIRHASH_VISIBLE
) == 0);
1420 * Can return NULL and error == EXDEV if the common parent
1421 * crosses a directory with the xlink flag set.
1423 hammer2_inode_lock(tdip
, 0);
1424 hammer2_inode_lock(ip
, 0);
1427 * Create the hardlink target and bump nlinks.
1430 hammer2_inode_create(tdip
, tdip
, NULL
, NULL
,
1433 HAMMER2_OBJTYPE_HARDLINK
, ip
->meta
.type
,
1435 hammer2_inode_modify(ip
);
1440 * Update dip's mtime
1444 hammer2_update_time(&mtime
);
1445 hammer2_inode_modify(tdip
);
1446 tdip
->meta
.mtime
= mtime
;
1448 cache_setunresolved(ap
->a_nch
);
1449 cache_setvp(ap
->a_nch
, ap
->a_vp
);
1451 hammer2_inode_unlock(ip
);
1452 hammer2_inode_unlock(tdip
);
1454 hammer2_trans_done(ip
->pmp
);
1461 * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1463 * The operating system has already ensured that the directory entry
1464 * does not exist and done all appropriate namespace locking.
1468 hammer2_vop_ncreate(struct vop_ncreate_args
*ap
)
1470 hammer2_inode_t
*dip
;
1471 hammer2_inode_t
*nip
;
1472 struct namecache
*ncp
;
1473 const uint8_t *name
;
1479 dip
= VTOI(ap
->a_dvp
);
1480 if (dip
->pmp
->ronly
) {
1485 ncp
= ap
->a_nch
->ncp
;
1486 name
= ncp
->nc_name
;
1487 name_len
= ncp
->nc_nlen
;
1488 hammer2_pfs_memory_wait(dip
->pmp
);
1489 hammer2_trans_init(dip
->pmp
, 0);
1491 inum
= hammer2_trans_newinum(dip
->pmp
);
1494 * Create the actual inode as a hidden file in the iroot, then
1495 * create the directory entry as a hardlink to it. The creation
1496 * of the actual inode sets its nlinks to 1 which is the value
1499 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1505 hammer2_inode_create(dip
, dip
, NULL
, NULL
,
1508 HAMMER2_OBJTYPE_HARDLINK
, nip
->meta
.type
,
1512 KKASSERT(nip
== NULL
);
1515 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1516 hammer2_inode_unlock(nip
);
1520 * Update dip's mtime
1525 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1526 hammer2_update_time(&mtime
);
1527 hammer2_inode_modify(dip
);
1528 dip
->meta
.mtime
= mtime
;
1529 hammer2_inode_unlock(dip
);
1532 hammer2_trans_done(dip
->pmp
);
1535 cache_setunresolved(ap
->a_nch
);
1536 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1543 * Make a device node (typically a fifo)
1547 hammer2_vop_nmknod(struct vop_nmknod_args
*ap
)
1549 hammer2_inode_t
*dip
;
1550 hammer2_inode_t
*nip
;
1551 struct namecache
*ncp
;
1552 const uint8_t *name
;
1558 dip
= VTOI(ap
->a_dvp
);
1559 if (dip
->pmp
->ronly
) {
1564 ncp
= ap
->a_nch
->ncp
;
1565 name
= ncp
->nc_name
;
1566 name_len
= ncp
->nc_nlen
;
1567 hammer2_pfs_memory_wait(dip
->pmp
);
1568 hammer2_trans_init(dip
->pmp
, 0);
1571 * The device node is entered as the directory entry itself and not
1572 * as a hardlink to an inode. Since one cannot obtain a
1573 * file handle on the filesystem entry representing the device, we
1574 * do not have to worry about indexing its inode.
1576 inum
= hammer2_trans_newinum(dip
->pmp
);
1577 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1582 hammer2_inode_create(dip
, dip
, NULL
, NULL
,
1585 HAMMER2_OBJTYPE_HARDLINK
, nip
->meta
.type
,
1591 KKASSERT(nip
== NULL
);
1594 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1595 hammer2_inode_unlock(nip
);
1599 * Update dip's mtime
1604 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1605 hammer2_update_time(&mtime
);
1606 hammer2_inode_modify(dip
);
1607 dip
->meta
.mtime
= mtime
;
1608 hammer2_inode_unlock(dip
);
1611 hammer2_trans_done(dip
->pmp
);
1614 cache_setunresolved(ap
->a_nch
);
1615 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1622 * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1626 hammer2_vop_nsymlink(struct vop_nsymlink_args
*ap
)
1628 hammer2_inode_t
*dip
;
1629 hammer2_inode_t
*nip
;
1630 struct namecache
*ncp
;
1631 const uint8_t *name
;
1636 dip
= VTOI(ap
->a_dvp
);
1637 if (dip
->pmp
->ronly
)
1640 ncp
= ap
->a_nch
->ncp
;
1641 name
= ncp
->nc_name
;
1642 name_len
= ncp
->nc_nlen
;
1643 hammer2_pfs_memory_wait(dip
->pmp
);
1644 hammer2_trans_init(dip
->pmp
, 0);
1646 ap
->a_vap
->va_type
= VLNK
; /* enforce type */
1649 * The softlink is entered into the directory itself and not
1650 * as a hardlink to an inode. Since one cannot obtain a
1651 * file handle on the softlink itself we do not have to worry
1652 * about indexing its inode.
1654 inum
= hammer2_trans_newinum(dip
->pmp
);
1656 nip
= hammer2_inode_create(dip
->pmp
->iroot
, dip
, ap
->a_vap
, ap
->a_cred
,
1661 hammer2_inode_create(dip
, dip
, NULL
, NULL
,
1664 HAMMER2_OBJTYPE_HARDLINK
, nip
->meta
.type
,
1670 KKASSERT(nip
== NULL
);
1672 hammer2_trans_done(dip
->pmp
);
1675 *ap
->a_vpp
= hammer2_igetv(nip
, &error
);
1678 * Build the softlink (~like file data) and finalize the namecache.
1685 bytes
= strlen(ap
->a_target
);
1687 hammer2_inode_unlock(nip
);
1688 bzero(&auio
, sizeof(auio
));
1689 bzero(&aiov
, sizeof(aiov
));
1690 auio
.uio_iov
= &aiov
;
1691 auio
.uio_segflg
= UIO_SYSSPACE
;
1692 auio
.uio_rw
= UIO_WRITE
;
1693 auio
.uio_resid
= bytes
;
1694 auio
.uio_iovcnt
= 1;
1695 auio
.uio_td
= curthread
;
1696 aiov
.iov_base
= ap
->a_target
;
1697 aiov
.iov_len
= bytes
;
1698 error
= hammer2_write_file(nip
, &auio
, IO_APPEND
, 0);
1699 /* XXX handle error */
1702 hammer2_inode_unlock(nip
);
1706 * Update dip's mtime
1711 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1712 hammer2_update_time(&mtime
);
1713 hammer2_inode_modify(dip
);
1714 dip
->meta
.mtime
= mtime
;
1715 hammer2_inode_unlock(dip
);
1718 hammer2_trans_done(dip
->pmp
);
1721 * Finalize namecache
1724 cache_setunresolved(ap
->a_nch
);
1725 cache_setvp(ap
->a_nch
, *ap
->a_vpp
);
1726 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1732 * hammer2_vop_nremove { nch, dvp, cred }
1736 hammer2_vop_nremove(struct vop_nremove_args
*ap
)
1738 hammer2_xop_unlink_t
*xop
;
1739 hammer2_inode_t
*dip
;
1740 hammer2_inode_t
*ip
;
1741 struct namecache
*ncp
;
1746 dip
= VTOI(ap
->a_dvp
);
1747 if (dip
->pmp
->ronly
) {
1752 ncp
= ap
->a_nch
->ncp
;
1754 hammer2_pfs_memory_wait(dip
->pmp
);
1755 hammer2_trans_init(dip
->pmp
, 0);
1756 hammer2_inode_lock(dip
, 0);
1759 * The unlink XOP unlinks the path from the directory and
1760 * locates and returns the cluster associated with the real inode.
1761 * We have to handle nlinks here on the frontend.
1763 xop
= hammer2_xop_alloc(dip
, HAMMER2_XOP_MODIFYING
);
1764 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1765 isopen
= cache_isopen(ap
->a_nch
);
1767 xop
->dopermanent
= 0;
1768 hammer2_xop_start(&xop
->head
, hammer2_xop_unlink
);
1771 * Collect the real inode and adjust nlinks, destroy the real
1772 * inode if nlinks transitions to 0 and it was the real inode
1773 * (else it has already been removed).
1775 error
= hammer2_xop_collect(&xop
->head
, 0);
1776 hammer2_inode_unlock(dip
);
1779 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1780 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1782 hammer2_inode_unlink_finisher(ip
, isopen
);
1783 hammer2_inode_unlock(ip
);
1786 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1790 * Update dip's mtime
1795 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1796 hammer2_update_time(&mtime
);
1797 hammer2_inode_modify(dip
);
1798 dip
->meta
.mtime
= mtime
;
1799 hammer2_inode_unlock(dip
);
1802 hammer2_inode_run_sideq(dip
->pmp
);
1803 hammer2_trans_done(dip
->pmp
);
1805 cache_unlink(ap
->a_nch
);
1811 * hammer2_vop_nrmdir { nch, dvp, cred }
1815 hammer2_vop_nrmdir(struct vop_nrmdir_args
*ap
)
1817 hammer2_xop_unlink_t
*xop
;
1818 hammer2_inode_t
*dip
;
1819 hammer2_inode_t
*ip
;
1820 struct namecache
*ncp
;
1825 dip
= VTOI(ap
->a_dvp
);
1826 if (dip
->pmp
->ronly
) {
1831 hammer2_pfs_memory_wait(dip
->pmp
);
1832 hammer2_trans_init(dip
->pmp
, 0);
1833 hammer2_inode_lock(dip
, 0);
1835 xop
= hammer2_xop_alloc(dip
, HAMMER2_XOP_MODIFYING
);
1837 ncp
= ap
->a_nch
->ncp
;
1838 hammer2_xop_setname(&xop
->head
, ncp
->nc_name
, ncp
->nc_nlen
);
1839 isopen
= cache_isopen(ap
->a_nch
);
1841 xop
->dopermanent
= 0;
1842 hammer2_xop_start(&xop
->head
, hammer2_xop_unlink
);
1845 * Collect the real inode and adjust nlinks, destroy the real
1846 * inode if nlinks transitions to 0 and it was the real inode
1847 * (else it has already been removed).
1849 error
= hammer2_xop_collect(&xop
->head
, 0);
1850 hammer2_inode_unlock(dip
);
1853 ip
= hammer2_inode_get(dip
->pmp
, dip
, &xop
->head
.cluster
, -1);
1854 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1856 hammer2_inode_unlink_finisher(ip
, isopen
);
1857 hammer2_inode_unlock(ip
);
1860 hammer2_xop_retire(&xop
->head
, HAMMER2_XOPMASK_VOP
);
1864 * Update dip's mtime
1869 hammer2_inode_lock(dip
, HAMMER2_RESOLVE_SHARED
);
1870 hammer2_update_time(&mtime
);
1871 hammer2_inode_modify(dip
);
1872 dip
->meta
.mtime
= mtime
;
1873 hammer2_inode_unlock(dip
);
1876 hammer2_inode_run_sideq(dip
->pmp
);
1877 hammer2_trans_done(dip
->pmp
);
1879 cache_unlink(ap
->a_nch
);
1885 * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1889 hammer2_vop_nrename(struct vop_nrename_args
*ap
)
1891 struct namecache
*fncp
;
1892 struct namecache
*tncp
;
1893 hammer2_inode_t
*fdip
;
1894 hammer2_inode_t
*tdip
;
1895 hammer2_inode_t
*ip
;
1896 const uint8_t *fname
;
1898 const uint8_t *tname
;
1906 if (ap
->a_fdvp
->v_mount
!= ap
->a_tdvp
->v_mount
)
1908 if (ap
->a_fdvp
->v_mount
!= ap
->a_fnch
->ncp
->nc_vp
->v_mount
)
1911 fdip
= VTOI(ap
->a_fdvp
); /* source directory */
1912 tdip
= VTOI(ap
->a_tdvp
); /* target directory */
1914 if (fdip
->pmp
->ronly
)
1918 fncp
= ap
->a_fnch
->ncp
; /* entry name in source */
1919 fname
= fncp
->nc_name
;
1920 fname_len
= fncp
->nc_nlen
;
1922 tncp
= ap
->a_tnch
->ncp
; /* entry name in target */
1923 tname
= tncp
->nc_name
;
1924 tname_len
= tncp
->nc_nlen
;
1926 hammer2_pfs_memory_wait(tdip
->pmp
);
1927 hammer2_trans_init(tdip
->pmp
, 0);
1933 * ip is the inode being renamed. If this is a hardlink then
1934 * ip represents the actual file and not the hardlink marker.
1936 ip
= VTOI(fncp
->nc_vp
);
1938 KKASSERT((ip
->meta
.name_key
& HAMMER2_DIRHASH_VISIBLE
) == 0);
1941 * Can return NULL and error == EXDEV if the common parent
1942 * crosses a directory with the xlink flag set.
1945 hammer2_inode_lock(fdip
, 0);
1946 hammer2_inode_lock(tdip
, 0);
1947 hammer2_inode_ref(ip
); /* extra ref */
1949 hammer2_inode_lock(ip
, 0);
1952 * Delete the target namespace.
1955 hammer2_xop_unlink_t
*xop2
;
1956 hammer2_inode_t
*tip
;
1960 * The unlink XOP unlinks the path from the directory and
1961 * locates and returns the cluster associated with the real
1962 * inode. We have to handle nlinks here on the frontend.
1964 xop2
= hammer2_xop_alloc(tdip
, HAMMER2_XOP_MODIFYING
);
1965 hammer2_xop_setname(&xop2
->head
, tname
, tname_len
);
1966 isopen
= cache_isopen(ap
->a_tnch
);
1968 xop2
->dopermanent
= 0;
1969 hammer2_xop_start(&xop2
->head
, hammer2_xop_unlink
);
1972 * Collect the real inode and adjust nlinks, destroy the real
1973 * inode if nlinks transitions to 0 and it was the real inode
1974 * (else it has already been removed).
1976 tnch_error
= hammer2_xop_collect(&xop2
->head
, 0);
1977 /* hammer2_inode_unlock(tdip); */
1979 if (tnch_error
== 0) {
1980 tip
= hammer2_inode_get(tdip
->pmp
, NULL
,
1981 &xop2
->head
.cluster
, -1);
1982 hammer2_xop_retire(&xop2
->head
, HAMMER2_XOPMASK_VOP
);
1984 hammer2_inode_unlink_finisher(tip
, isopen
);
1985 hammer2_inode_unlock(tip
);
1988 hammer2_xop_retire(&xop2
->head
, HAMMER2_XOPMASK_VOP
);
1990 /* hammer2_inode_lock(tdip, 0); */
1992 if (tnch_error
&& tnch_error
!= ENOENT
) {
2000 * Resolve the collision space for (tdip, tname, tname_len)
2002 * tdip must be held exclusively locked to prevent races.
2005 hammer2_xop_scanlhc_t
*sxop
;
2006 hammer2_tid_t lhcbase
;
2008 tlhc
= hammer2_dirhash(tname
, tname_len
);
2010 sxop
= hammer2_xop_alloc(tdip
, HAMMER2_XOP_MODIFYING
);
2012 hammer2_xop_start(&sxop
->head
, hammer2_xop_scanlhc
);
2013 while ((error
= hammer2_xop_collect(&sxop
->head
, 0)) == 0) {
2014 if (tlhc
!= sxop
->head
.cluster
.focus
->bref
.key
)
2018 hammer2_xop_retire(&sxop
->head
, HAMMER2_XOPMASK_VOP
);
2021 if (error
!= ENOENT
)
2026 if ((lhcbase
^ tlhc
) & ~HAMMER2_DIRHASH_LOMASK
) {
2033 * Everything is setup, do the rename.
2035 * We have to synchronize ip->meta to the underlying operation.
2037 * NOTE: To avoid deadlocks we cannot lock (ip) while we are
2038 * unlinking elements from their directories. Locking
2039 * the nlinks field does not lock the whole inode.
2041 /* hammer2_inode_lock(ip, 0); */
2043 hammer2_xop_nrename_t
*xop4
;
2045 xop4
= hammer2_xop_alloc(fdip
, HAMMER2_XOP_MODIFYING
);
2047 xop4
->ip_key
= ip
->meta
.name_key
;
2048 hammer2_xop_setip2(&xop4
->head
, ip
);
2049 hammer2_xop_setip3(&xop4
->head
, tdip
);
2050 hammer2_xop_setname(&xop4
->head
, fname
, fname_len
);
2051 hammer2_xop_setname2(&xop4
->head
, tname
, tname_len
);
2052 hammer2_xop_start(&xop4
->head
, hammer2_xop_nrename
);
2054 error
= hammer2_xop_collect(&xop4
->head
, 0);
2055 hammer2_xop_retire(&xop4
->head
, HAMMER2_XOPMASK_VOP
);
2057 if (error
== ENOENT
)
2060 (ip
->meta
.name_key
& HAMMER2_DIRHASH_VISIBLE
)) {
2061 hammer2_inode_modify(ip
);
2062 ip
->meta
.name_len
= tname_len
;
2063 ip
->meta
.name_key
= tlhc
;
2072 * Update directory mtimes to represent the something changed.
2074 if (update_fdip
|| update_tdip
) {
2077 hammer2_update_time(&mtime
);
2079 hammer2_inode_modify(fdip
);
2080 fdip
->meta
.mtime
= mtime
;
2083 hammer2_inode_modify(tdip
);
2084 tdip
->meta
.mtime
= mtime
;
2087 hammer2_inode_unlock(ip
);
2088 hammer2_inode_unlock(tdip
);
2089 hammer2_inode_unlock(fdip
);
2090 hammer2_inode_drop(ip
);
2091 hammer2_inode_run_sideq(fdip
->pmp
);
2093 hammer2_trans_done(tdip
->pmp
);
2096 * Issue the namecache update after unlocking all the internal
2097 * hammer structures, otherwise we might deadlock.
2099 if (tnch_error
== 0) {
2100 cache_unlink(ap
->a_tnch
);
2101 cache_setunresolved(ap
->a_tnch
);
2104 cache_rename(ap
->a_fnch
, ap
->a_tnch
);
2111 * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2115 hammer2_vop_ioctl(struct vop_ioctl_args
*ap
)
2117 hammer2_inode_t
*ip
;
2121 ip
= VTOI(ap
->a_vp
);
2123 error
= hammer2_ioctl(ip
, ap
->a_command
, (void *)ap
->a_data
,
2124 ap
->a_fflag
, ap
->a_cred
);
2131 hammer2_vop_mountctl(struct vop_mountctl_args
*ap
)
2139 case (MOUNTCTL_SET_EXPORT
):
2140 mp
= ap
->a_head
.a_ops
->head
.vv_mount
;
2143 if (ap
->a_ctllen
!= sizeof(struct export_args
))
2146 rc
= vfs_export(mp
, &pmp
->export
,
2147 (const struct export_args
*)ap
->a_ctl
);
2150 rc
= vop_stdmountctl(ap
);
2160 static void filt_hammer2detach(struct knote
*kn
);
2161 static int filt_hammer2read(struct knote
*kn
, long hint
);
2162 static int filt_hammer2write(struct knote
*kn
, long hint
);
2163 static int filt_hammer2vnode(struct knote
*kn
, long hint
);
2165 static struct filterops hammer2read_filtops
=
2166 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2167 NULL
, filt_hammer2detach
, filt_hammer2read
};
2168 static struct filterops hammer2write_filtops
=
2169 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2170 NULL
, filt_hammer2detach
, filt_hammer2write
};
2171 static struct filterops hammer2vnode_filtops
=
2172 { FILTEROP_ISFD
| FILTEROP_MPSAFE
,
2173 NULL
, filt_hammer2detach
, filt_hammer2vnode
};
2177 hammer2_vop_kqfilter(struct vop_kqfilter_args
*ap
)
2179 struct vnode
*vp
= ap
->a_vp
;
2180 struct knote
*kn
= ap
->a_kn
;
2182 switch (kn
->kn_filter
) {
2184 kn
->kn_fop
= &hammer2read_filtops
;
2187 kn
->kn_fop
= &hammer2write_filtops
;
2190 kn
->kn_fop
= &hammer2vnode_filtops
;
2193 return (EOPNOTSUPP
);
2196 kn
->kn_hook
= (caddr_t
)vp
;
2198 knote_insert(&vp
->v_pollinfo
.vpi_kqinfo
.ki_note
, kn
);
2204 filt_hammer2detach(struct knote
*kn
)
2206 struct vnode
*vp
= (void *)kn
->kn_hook
;
2208 knote_remove(&vp
->v_pollinfo
.vpi_kqinfo
.ki_note
, kn
);
2212 filt_hammer2read(struct knote
*kn
, long hint
)
2214 struct vnode
*vp
= (void *)kn
->kn_hook
;
2215 hammer2_inode_t
*ip
= VTOI(vp
);
2218 if (hint
== NOTE_REVOKE
) {
2219 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
| EV_ONESHOT
);
2222 off
= ip
->meta
.size
- kn
->kn_fp
->f_offset
;
2223 kn
->kn_data
= (off
< INTPTR_MAX
) ? off
: INTPTR_MAX
;
2224 if (kn
->kn_sfflags
& NOTE_OLDAPI
)
2226 return (kn
->kn_data
!= 0);
2231 filt_hammer2write(struct knote
*kn
, long hint
)
2233 if (hint
== NOTE_REVOKE
)
2234 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
| EV_ONESHOT
);
2240 filt_hammer2vnode(struct knote
*kn
, long hint
)
2242 if (kn
->kn_sfflags
& hint
)
2243 kn
->kn_fflags
|= hint
;
2244 if (hint
== NOTE_REVOKE
) {
2245 kn
->kn_flags
|= (EV_EOF
| EV_NODATA
);
2248 return (kn
->kn_fflags
!= 0);
2256 hammer2_vop_markatime(struct vop_markatime_args
*ap
)
2258 hammer2_inode_t
*ip
;
2271 hammer2_vop_fifokqfilter(struct vop_kqfilter_args
*ap
)
2275 error
= VOCALL(&fifo_vnode_vops
, &ap
->a_head
);
2277 error
= hammer2_vop_kqfilter(ap
);
2284 struct vop_ops hammer2_vnode_vops
= {
2285 .vop_default
= vop_defaultop
,
2286 .vop_fsync
= hammer2_vop_fsync
,
2287 .vop_getpages
= vop_stdgetpages
,
2288 .vop_putpages
= vop_stdputpages
,
2289 .vop_access
= hammer2_vop_access
,
2290 .vop_advlock
= hammer2_vop_advlock
,
2291 .vop_close
= hammer2_vop_close
,
2292 .vop_nlink
= hammer2_vop_nlink
,
2293 .vop_ncreate
= hammer2_vop_ncreate
,
2294 .vop_nsymlink
= hammer2_vop_nsymlink
,
2295 .vop_nremove
= hammer2_vop_nremove
,
2296 .vop_nrmdir
= hammer2_vop_nrmdir
,
2297 .vop_nrename
= hammer2_vop_nrename
,
2298 .vop_getattr
= hammer2_vop_getattr
,
2299 .vop_setattr
= hammer2_vop_setattr
,
2300 .vop_readdir
= hammer2_vop_readdir
,
2301 .vop_readlink
= hammer2_vop_readlink
,
2302 .vop_getpages
= vop_stdgetpages
,
2303 .vop_putpages
= vop_stdputpages
,
2304 .vop_read
= hammer2_vop_read
,
2305 .vop_write
= hammer2_vop_write
,
2306 .vop_open
= hammer2_vop_open
,
2307 .vop_inactive
= hammer2_vop_inactive
,
2308 .vop_reclaim
= hammer2_vop_reclaim
,
2309 .vop_nresolve
= hammer2_vop_nresolve
,
2310 .vop_nlookupdotdot
= hammer2_vop_nlookupdotdot
,
2311 .vop_nmkdir
= hammer2_vop_nmkdir
,
2312 .vop_nmknod
= hammer2_vop_nmknod
,
2313 .vop_ioctl
= hammer2_vop_ioctl
,
2314 .vop_mountctl
= hammer2_vop_mountctl
,
2315 .vop_bmap
= hammer2_vop_bmap
,
2316 .vop_strategy
= hammer2_vop_strategy
,
2317 .vop_kqfilter
= hammer2_vop_kqfilter
2320 struct vop_ops hammer2_spec_vops
= {
2321 .vop_default
= vop_defaultop
,
2322 .vop_fsync
= hammer2_vop_fsync
,
2323 .vop_read
= vop_stdnoread
,
2324 .vop_write
= vop_stdnowrite
,
2325 .vop_access
= hammer2_vop_access
,
2326 .vop_close
= hammer2_vop_close
,
2327 .vop_markatime
= hammer2_vop_markatime
,
2328 .vop_getattr
= hammer2_vop_getattr
,
2329 .vop_inactive
= hammer2_vop_inactive
,
2330 .vop_reclaim
= hammer2_vop_reclaim
,
2331 .vop_setattr
= hammer2_vop_setattr
2334 struct vop_ops hammer2_fifo_vops
= {
2335 .vop_default
= fifo_vnoperate
,
2336 .vop_fsync
= hammer2_vop_fsync
,
2338 .vop_read
= hammer2_vop_fiforead
,
2339 .vop_write
= hammer2_vop_fifowrite
,
2341 .vop_access
= hammer2_vop_access
,
2343 .vop_close
= hammer2_vop_fifoclose
,
2345 .vop_markatime
= hammer2_vop_markatime
,
2346 .vop_getattr
= hammer2_vop_getattr
,
2347 .vop_inactive
= hammer2_vop_inactive
,
2348 .vop_reclaim
= hammer2_vop_reclaim
,
2349 .vop_setattr
= hammer2_vop_setattr
,
2350 .vop_kqfilter
= hammer2_vop_fifokqfilter