2 * Copyright (c) 2011-2012 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>
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/fcntl.h>
41 #include <sys/namei.h>
42 #include <sys/mount.h>
43 #include <sys/vnode.h>
44 #include <sys/mountctl.h>
45 #include <sys/dirent.h>
50 #define ZFOFFSET (-2LL)
52 static int hammer2_read_file(hammer2_inode_t *ip, struct uio *uio,
54 static int hammer2_write_file(hammer2_inode_t *ip, struct uio *uio, int ioflag,
56 static hammer2_off_t hammer2_assign_physical(hammer2_inode_t *ip,
57 hammer2_key_t lbase, int lblksize, int *errorp);
58 static void hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize);
59 static void hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize);
63 hammer2_knote(struct vnode *vp, int flags)
66 KNOTE(&vp->v_pollinfo.vpi_kqinfo.ki_note, flags);
70 * Last reference to a vnode is going away but it is still cached.
74 hammer2_vop_inactive(struct vop_inactive_args *ap)
77 struct hammer2_inode *ip;
79 struct hammer2_mount *hmp;
94 * Detect updates to the embedded data which may be synchronized by
95 * the strategy code. Simply mark the inode modified so it gets
96 * picked up by our normal flush.
98 if (ip->chain.flags & HAMMER2_CHAIN_DIRTYEMBED) {
99 hammer2_inode_lock_ex(ip);
100 atomic_clear_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
101 hammer2_chain_modify(ip->hmp, &ip->chain, 0);
102 hammer2_inode_unlock_ex(ip);
106 * Check for deleted inodes and recycle immediately.
108 if (ip->chain.flags & HAMMER2_CHAIN_DELETED) {
115 * Reclaim a vnode so that it can be reused; after the inode is
116 * disassociated, the filesystem must manage it alone.
120 hammer2_vop_reclaim(struct vop_reclaim_args *ap)
122 struct hammer2_inode *ip;
123 struct hammer2_mount *hmp;
133 * Set SUBMODIFIED so we can detect and propagate the DESTROYED
134 * bit in the flush code.
136 hammer2_inode_lock_ex(ip);
139 if (ip->chain.flags & HAMMER2_CHAIN_DELETED) {
140 atomic_set_int(&ip->chain.flags, HAMMER2_CHAIN_DESTROYED |
141 HAMMER2_CHAIN_SUBMODIFIED);
143 hammer2_chain_flush(hmp, &ip->chain, 0);
144 hammer2_inode_unlock_ex(ip);
145 hammer2_chain_drop(hmp, &ip->chain); /* vp ref */
148 * XXX handle background sync when ip dirty, kernel will no longer
149 * notify us regarding this inode because there is no longer a
150 * vnode attached to it.
158 hammer2_vop_fsync(struct vop_fsync_args *ap)
160 struct hammer2_inode *ip;
161 struct hammer2_mount *hmp;
168 hammer2_inode_lock_ex(ip);
169 vfsync(vp, ap->a_waitfor, 1, NULL, NULL);
172 * Detect updates to the embedded data which may be synchronized by
173 * the strategy code. Simply mark the inode modified so it gets
174 * picked up by our normal flush.
176 if (ip->chain.flags & HAMMER2_CHAIN_DIRTYEMBED) {
177 atomic_clear_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
178 hammer2_chain_modify(hmp, &ip->chain, 0);
182 * Calling chain_flush here creates a lot of duplicative
183 * COW operations due to non-optimal vnode ordering.
185 * Only do it for an actual fsync() syscall. The other forms
186 * which call this function will eventually call chain_flush
187 * on the volume root as a catch-all, which is far more optimal.
189 if (ap->a_flags & VOP_FSYNC_SYSCALL)
190 hammer2_chain_flush(hmp, &ip->chain, 0);
191 hammer2_inode_unlock_ex(ip);
197 hammer2_vop_access(struct vop_access_args *ap)
199 hammer2_inode_t *ip = VTOI(ap->a_vp);
204 uid = hammer2_to_unix_xid(&ip->ip_data.uid);
205 gid = hammer2_to_unix_xid(&ip->ip_data.gid);
207 error = vop_helper_access(ap, uid, gid, ip->ip_data.mode,
214 hammer2_vop_getattr(struct vop_getattr_args *ap)
216 hammer2_pfsmount_t *pmp;
227 hammer2_inode_lock_sh(ip);
229 vap->va_fsid = pmp->mp->mnt_stat.f_fsid.val[0];
230 vap->va_fileid = ip->ip_data.inum;
231 vap->va_mode = ip->ip_data.mode;
232 vap->va_nlink = ip->ip_data.nlinks;
233 vap->va_uid = hammer2_to_unix_xid(&ip->ip_data.uid);
234 vap->va_gid = hammer2_to_unix_xid(&ip->ip_data.gid);
237 vap->va_size = ip->ip_data.size;
238 vap->va_blocksize = HAMMER2_PBUFSIZE;
239 vap->va_flags = ip->ip_data.uflags;
240 hammer2_time_to_timespec(ip->ip_data.ctime, &vap->va_ctime);
241 hammer2_time_to_timespec(ip->ip_data.mtime, &vap->va_mtime);
242 hammer2_time_to_timespec(ip->ip_data.mtime, &vap->va_atime);
244 vap->va_bytes = vap->va_size; /* XXX */
245 vap->va_type = hammer2_get_vtype(ip);
247 vap->va_uid_uuid = ip->ip_data.uid;
248 vap->va_gid_uuid = ip->ip_data.gid;
249 vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
252 hammer2_inode_unlock_sh(ip);
259 hammer2_vop_setattr(struct vop_setattr_args *ap)
261 hammer2_mount_t *hmp;
272 hammer2_update_time(&ctime);
280 hammer2_inode_lock_ex(ip);
283 if (vap->va_flags != VNOVAL) {
286 flags = ip->ip_data.uflags;
287 error = vop_helper_setattr_flags(&flags, vap->va_flags,
288 hammer2_to_unix_xid(&ip->ip_data.uid),
291 if (ip->ip_data.uflags != flags) {
292 hammer2_chain_modify(hmp, &ip->chain, 0);
293 ip->ip_data.uflags = flags;
294 ip->ip_data.ctime = ctime;
295 kflags |= NOTE_ATTRIB;
297 if (ip->ip_data.uflags & (IMMUTABLE | APPEND)) {
304 if (ip->ip_data.uflags & (IMMUTABLE | APPEND)) {
308 if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
309 mode_t cur_mode = ip->ip_data.mode;
310 uid_t cur_uid = hammer2_to_unix_xid(&ip->ip_data.uid);
311 gid_t cur_gid = hammer2_to_unix_xid(&ip->ip_data.gid);
315 error = vop_helper_chown(ap->a_vp, vap->va_uid, vap->va_gid,
317 &cur_uid, &cur_gid, &cur_mode);
319 hammer2_guid_to_uuid(&uuid_uid, cur_uid);
320 hammer2_guid_to_uuid(&uuid_gid, cur_gid);
321 if (bcmp(&uuid_uid, &ip->ip_data.uid,
323 bcmp(&uuid_gid, &ip->ip_data.gid,
325 ip->ip_data.mode != cur_mode
327 hammer2_chain_modify(hmp, &ip->chain, 0);
328 ip->ip_data.uid = uuid_uid;
329 ip->ip_data.gid = uuid_gid;
330 ip->ip_data.mode = cur_mode;
331 ip->ip_data.ctime = ctime;
333 kflags |= NOTE_ATTRIB;
340 if (vap->va_size != VNOVAL && ip->ip_data.size != vap->va_size) {
343 if (vap->va_size == ip->ip_data.size)
345 if (vap->va_size < ip->ip_data.size) {
346 hammer2_truncate_file(ip, vap->va_size);
348 hammer2_extend_file(ip, vap->va_size);
358 /* atime not supported */
359 if (vap->va_atime.tv_sec != VNOVAL) {
360 hammer2_chain_modify(hmp, &ip->chain, 0);
361 ip->ip_data.atime = hammer2_timespec_to_time(&vap->va_atime);
362 kflags |= NOTE_ATTRIB;
365 if (vap->va_mtime.tv_sec != VNOVAL) {
366 hammer2_chain_modify(hmp, &ip->chain, 0);
367 ip->ip_data.mtime = hammer2_timespec_to_time(&vap->va_mtime);
368 kflags |= NOTE_ATTRIB;
370 if (vap->va_mode != (mode_t)VNOVAL) {
371 mode_t cur_mode = ip->ip_data.mode;
372 uid_t cur_uid = hammer2_to_unix_xid(&ip->ip_data.uid);
373 gid_t cur_gid = hammer2_to_unix_xid(&ip->ip_data.gid);
375 error = vop_helper_chmod(ap->a_vp, vap->va_mode, ap->a_cred,
376 cur_uid, cur_gid, &cur_mode);
377 if (error == 0 && ip->ip_data.mode != cur_mode) {
378 ip->ip_data.mode = cur_mode;
379 ip->ip_data.ctime = ctime;
380 kflags |= NOTE_ATTRIB;
384 hammer2_inode_unlock_ex(ip);
390 hammer2_vop_readdir(struct vop_readdir_args *ap)
392 hammer2_mount_t *hmp;
394 hammer2_inode_t *xip;
395 hammer2_chain_t *parent;
396 hammer2_chain_t *chain;
410 saveoff = uio->uio_offset;
413 * Setup cookies directory entry cookies if requested
415 if (ap->a_ncookies) {
416 ncookies = uio->uio_resid / 16 + 1;
419 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
427 * Handle artificial entries. To ensure that only positive 64 bit
428 * quantities are returned to userland we always strip off bit 63.
429 * The hash code is designed such that codes 0x0000-0x7FFF are not
430 * used, allowing us to use these codes for articial entries.
432 * Entry 0 is used for '.' and entry 1 is used for '..'. Do not
433 * allow '..' to cross the mount point into (e.g.) the super-root.
436 chain = (void *)(intptr_t)-1; /* non-NULL for early goto done case */
439 r = vop_write_dirent(&error, uio,
441 HAMMER2_DIRHASH_USERMSK,
446 cookies[cookie_index] = saveoff;
449 if (cookie_index == ncookies)
453 if (ip->pip == NULL || ip == ip->pmp->iroot)
458 r = vop_write_dirent(&error, uio,
460 HAMMER2_DIRHASH_USERMSK,
465 cookies[cookie_index] = saveoff;
468 if (cookie_index == ncookies)
472 lkey = saveoff | HAMMER2_DIRHASH_VISIBLE;
475 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS |
476 HAMMER2_RESOLVE_SHARED);
478 hammer2_chain_unlock(hmp, parent);
481 chain = hammer2_chain_lookup(hmp, &parent, lkey, lkey,
482 HAMMER2_LOOKUP_SHARED);
484 chain = hammer2_chain_lookup(hmp, &parent,
485 lkey, (hammer2_key_t)-1,
486 HAMMER2_LOOKUP_SHARED);
489 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
490 dtype = hammer2_get_dtype(chain->u.ip);
491 saveoff = chain->bref.key & HAMMER2_DIRHASH_USERMSK;
492 r = vop_write_dirent(&error, uio,
493 chain->u.ip->ip_data.inum &
494 HAMMER2_DIRHASH_USERMSK,
495 dtype, chain->u.ip->ip_data.name_len,
496 chain->u.ip->ip_data.filename);
500 cookies[cookie_index] = saveoff;
503 /* XXX chain error */
504 kprintf("bad chain type readdir %d\n",
509 * Keys may not be returned in order so once we have a
510 * placemarker (chain) the scan must allow the full range
511 * or some entries will be missed.
513 chain = hammer2_chain_next(hmp, &parent, chain,
514 HAMMER2_DIRHASH_VISIBLE,
516 HAMMER2_LOOKUP_SHARED);
518 saveoff = (chain->bref.key &
519 HAMMER2_DIRHASH_USERMSK) + 1;
521 saveoff = (hammer2_key_t)-1;
523 if (cookie_index == ncookies)
527 hammer2_chain_unlock(hmp, chain);
528 hammer2_chain_unlock(hmp, parent);
531 *ap->a_eofflag = (chain == NULL);
532 uio->uio_offset = saveoff & ~HAMMER2_DIRHASH_VISIBLE;
533 if (error && cookie_index == 0) {
535 kfree(cookies, M_TEMP);
537 *ap->a_cookies = NULL;
541 *ap->a_ncookies = cookie_index;
542 *ap->a_cookies = cookies;
549 * hammer2_vop_readlink { vp, uio, cred }
553 hammer2_vop_readlink(struct vop_readlink_args *ap)
556 hammer2_mount_t *hmp;
561 if (vp->v_type != VLNK)
566 error = hammer2_read_file(ip, ap->a_uio, 0);
572 hammer2_vop_read(struct vop_read_args *ap)
575 hammer2_mount_t *hmp;
583 * Read operations supported on this vnode?
586 if (vp->v_type != VREG)
597 seqcount = ap->a_ioflag >> 16;
598 bigread = (uio->uio_resid > 100 * 1024 * 1024);
600 error = hammer2_read_file(ip, uio, seqcount);
606 hammer2_vop_write(struct vop_write_args *ap)
610 hammer2_mount_t *hmp;
618 * Read operations supported on this vnode?
621 if (vp->v_type != VREG)
634 seqcount = ap->a_ioflag >> 16;
635 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
638 * Check resource limit
640 if (uio->uio_resid > 0 && (td = uio->uio_td) != NULL && td->td_proc &&
641 uio->uio_offset + uio->uio_resid >
642 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
643 lwpsignal(td->td_proc, td->td_lwp, SIGXFSZ);
647 bigwrite = (uio->uio_resid > 100 * 1024 * 1024);
650 * ip must be locked if extending the file.
651 * ip must be locked to avoid racing a truncation.
653 * ip must be marked modified, particularly because the write
654 * might wind up being copied into the embedded data area.
656 hammer2_inode_lock_ex(ip);
657 error = hammer2_write_file(ip, uio, ap->a_ioflag, seqcount);
658 hammer2_inode_unlock_ex(ip);
663 * Perform read operations on a file or symlink given an UNLOCKED
668 hammer2_read_file(hammer2_inode_t *ip, struct uio *uio, int seqcount)
678 while (uio->uio_resid > 0 && uio->uio_offset < ip->ip_data.size) {
685 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
688 error = cluster_read(ip->vp, leof, lbase, lblksize,
689 uio->uio_resid, seqcount * BKVASIZE,
694 loff = (int)(uio->uio_offset - lbase);
696 if (n > uio->uio_resid)
698 if (n > ip->ip_data.size - uio->uio_offset)
699 n = (int)(ip->ip_data.size - uio->uio_offset);
700 bp->b_flags |= B_AGE;
701 uiomove((char *)bp->b_data + loff, n, uio);
708 * Called with a locked (ip) to do the underlying write to a file or
709 * to build the symlink target.
713 hammer2_write_file(hammer2_inode_t *ip, struct uio *uio,
714 int ioflag, int seqcount)
716 hammer2_key_t old_eof;
725 if (ioflag & IO_APPEND)
726 uio->uio_offset = ip->ip_data.size;
731 * Extend the file if necessary. If the write fails at some point
732 * we will truncate it back down to cover as much as we were able
735 * Doing this now makes it easier to calculate buffer sizes in
738 old_eof = ip->ip_data.size;
739 if (uio->uio_offset + uio->uio_resid > ip->ip_data.size) {
741 hammer2_extend_file(ip, uio->uio_offset + uio->uio_resid);
742 kflags |= NOTE_EXTEND;
748 while (uio->uio_resid > 0) {
757 * Don't allow the buffer build to blow out the buffer
760 if ((ioflag & IO_RECURSE) == 0) {
762 * XXX should try to leave this unlocked through
765 hammer2_chain_unlock(ip->hmp, &ip->chain);
766 bwillwrite(HAMMER2_PBUFSIZE);
767 hammer2_chain_lock(ip->hmp, &ip->chain,
768 HAMMER2_RESOLVE_ALWAYS);
771 /* XXX bigwrite & signal check test */
774 * This nominally tells us how much we can cluster and
775 * what the logical buffer size needs to be. Currently
776 * we don't try to cluster the write and just handle one
779 lblksize = hammer2_calc_logical(ip, uio->uio_offset,
781 loff = (int)(uio->uio_offset - lbase);
784 * Calculate bytes to copy this transfer and whether the
785 * copy completely covers the buffer or not.
789 if (n > uio->uio_resid) {
791 if (uio->uio_offset + n == ip->ip_data.size)
793 } else if (loff == 0) {
800 if (uio->uio_segflg == UIO_NOCOPY) {
802 * Issuing a write with the same data backing the
803 * buffer. Instantiate the buffer to collect the
804 * backing vm pages, then read-in any missing bits.
806 * This case is used by vop_stdputpages().
808 bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
809 if ((bp->b_flags & B_CACHE) == 0) {
811 error = bread(ip->vp, lbase, lblksize, &bp);
813 } else if (trivial) {
815 * Even though we are entirely overwriting the buffer
816 * we may still have to zero it out to avoid a
817 * mmap/write visibility issue.
819 bp = getblk(ip->vp, lbase, lblksize, GETBLK_BHEAVY, 0);
820 if ((bp->b_flags & B_CACHE) == 0)
824 * Partial overwrite, read in any missing bits then
825 * replace the portion being written.
827 * (The strategy code will detect zero-fill physical
828 * blocks for this case).
830 error = bread(ip->vp, lbase, lblksize, &bp);
841 * We have to assign physical storage to the buffer we intend
842 * to dirty or write now to avoid deadlocks in the strategy
845 * This can return NOOFFSET for inode-embedded data. The
846 * strategy code will take care of it in that case.
848 bp->b_bio2.bio_offset =
849 hammer2_assign_physical(ip, lbase, lblksize, &error);
856 * Ok, copy the data in
858 hammer2_chain_unlock(ip->hmp, &ip->chain);
859 error = uiomove(bp->b_data + loff, n, uio);
860 hammer2_chain_lock(ip->hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
861 kflags |= NOTE_WRITE;
869 /* XXX update ip_data.mtime */
872 * Once we dirty a buffer any cached offset becomes invalid.
874 * NOTE: For cluster_write() always use the trailing block
875 * size, which is HAMMER2_PBUFSIZE. lblksize is the
876 * eof-straddling blocksize and is incorrect.
878 bp->b_flags |= B_AGE;
879 if (ioflag & IO_SYNC) {
881 } else if ((ioflag & IO_DIRECT) && loff + n == lblksize) {
882 if (bp->b_bcount == HAMMER2_PBUFSIZE)
883 bp->b_flags |= B_CLUSTEROK;
885 } else if (ioflag & IO_ASYNC) {
887 } else if (hammer2_cluster_enable) {
888 if (bp->b_bcount == HAMMER2_PBUFSIZE)
889 bp->b_flags |= B_CLUSTEROK;
890 cluster_write(bp, leof, HAMMER2_PBUFSIZE, seqcount);
892 if (bp->b_bcount == HAMMER2_PBUFSIZE)
893 bp->b_flags |= B_CLUSTEROK;
899 * Cleanup. If we extended the file EOF but failed to write through
900 * the entire write is a failure and we have to back-up.
902 if (error && ip->ip_data.size != old_eof) {
903 hammer2_truncate_file(ip, old_eof);
904 } else if (modified) {
905 hammer2_chain_modify(ip->hmp, &ip->chain, 0);
906 hammer2_update_time(&ip->ip_data.mtime);
908 hammer2_knote(ip->vp, kflags);
913 * Assign physical storage to a logical block.
915 * NOOFFSET is returned if the data is inode-embedded. In this case the
916 * strategy code will simply bcopy() the data into the inode.
918 * The inode's delta_dcount is adjusted.
922 hammer2_assign_physical(hammer2_inode_t *ip, hammer2_key_t lbase,
923 int lblksize, int *errorp)
925 hammer2_mount_t *hmp;
926 hammer2_chain_t *parent;
927 hammer2_chain_t *chain;
934 * Locate the chain associated with lbase, return a locked chain.
935 * However, do not instantiate any data reference (which utilizes a
936 * device buffer) because we will be using direct IO via the
937 * logical buffer cache buffer.
940 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
942 chain = hammer2_chain_lookup(hmp, &parent,
944 HAMMER2_LOOKUP_NODATA);
948 * We found a hole, create a new chain entry.
950 * NOTE: DATA chains are created without device backing
951 * store (nor do we want any).
953 chain = hammer2_chain_create(hmp, parent, NULL,
954 lbase, HAMMER2_PBUFRADIX,
955 HAMMER2_BREF_TYPE_DATA,
957 pbase = chain->bref.data_off & ~HAMMER2_OFF_MASK_RADIX;
958 ip->delta_dcount += lblksize;
960 switch (chain->bref.type) {
961 case HAMMER2_BREF_TYPE_INODE:
963 * The data is embedded in the inode. The
964 * caller is responsible for marking the inode
965 * modified and copying the data to the embedded
970 case HAMMER2_BREF_TYPE_DATA:
971 if (chain->bytes != lblksize) {
972 panic("hammer2_assign_physical: "
973 "size mismatch %d/%d\n",
974 lblksize, chain->bytes);
976 hammer2_chain_modify(hmp, chain,
977 HAMMER2_MODIFY_OPTDATA);
978 pbase = chain->bref.data_off & ~HAMMER2_OFF_MASK_RADIX;
981 panic("hammer2_assign_physical: bad type");
989 hammer2_chain_unlock(hmp, chain);
990 hammer2_chain_unlock(hmp, parent);
996 * Truncate the size of a file.
998 * This routine adjusts ip->ip_data.size smaller, destroying any related
999 * data beyond the new EOF and potentially resizing the block straddling
1002 * The inode must be locked.
1006 hammer2_truncate_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1008 hammer2_chain_t *parent;
1009 hammer2_chain_t *chain;
1010 hammer2_mount_t *hmp = ip->hmp;
1011 hammer2_key_t lbase;
1019 hammer2_chain_modify(hmp, &ip->chain, 0);
1023 * Destroy any logical buffer cache buffers beyond the file EOF.
1025 * We call nvtruncbuf() w/ trivial == 1 to prevent it from messing
1026 * around with the buffer straddling EOF, because we need to assign
1027 * a new physical offset to it.
1030 nvtruncbuf(ip->vp, nsize,
1031 HAMMER2_PBUFSIZE, (int)nsize & HAMMER2_PBUFMASK,
1036 * Setup for lookup/search
1038 parent = &ip->chain;
1039 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
1041 hammer2_chain_unlock(hmp, parent);
1042 /* XXX error reporting */
1047 * Handle the case where a chain/logical-buffer straddles the new
1048 * EOF. We told nvtruncbuf() above not to mess with the logical
1049 * buffer straddling the EOF because we need to reassign its storage
1050 * and can't let the strategy code do it for us.
1052 loff = (int)nsize & HAMMER2_PBUFMASK;
1053 if (loff && ip->vp) {
1054 oblksize = hammer2_calc_logical(ip, nsize, &lbase, &leof);
1055 error = bread(ip->vp, lbase, oblksize, &bp);
1056 KKASSERT(error == 0);
1058 ip->ip_data.size = nsize;
1059 nblksize = hammer2_calc_logical(ip, nsize, &lbase, &leof);
1062 * Fixup the chain element. If we have a logical buffer in-hand
1063 * we don't want to create a conflicting device buffer.
1066 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase,
1067 HAMMER2_LOOKUP_NODATA);
1069 allocbuf(bp, nblksize);
1070 switch(chain->bref.type) {
1071 case HAMMER2_BREF_TYPE_DATA:
1072 hammer2_chain_resize(ip, chain,
1073 hammer2_bytes_to_radix(nblksize),
1074 HAMMER2_MODIFY_OPTDATA);
1075 bzero(bp->b_data + loff, nblksize - loff);
1076 bp->b_bio2.bio_offset = chain->bref.data_off &
1079 case HAMMER2_BREF_TYPE_INODE:
1080 bzero(bp->b_data + loff, nblksize - loff);
1081 bp->b_bio2.bio_offset = NOOFFSET;
1084 panic("hammer2_truncate_file: bad type");
1087 hammer2_chain_unlock(hmp, chain);
1088 if (bp->b_bcount == HAMMER2_PBUFSIZE)
1089 bp->b_flags |= B_CLUSTEROK;
1093 * Destroy clean buffer w/ wrong buffer size. Retain
1096 bp->b_flags |= B_RELBUF;
1097 KKASSERT(bp->b_bio2.bio_offset == NOOFFSET);
1098 KKASSERT((bp->b_flags & B_DIRTY) == 0);
1103 * WARNING: This utilizes a device buffer for the data.
1105 * This case should not occur because file truncations without
1106 * a vnode (and hence no logical buffer cache) should only
1107 * always truncate to 0-length.
1109 panic("hammer2_truncate_file: non-zero truncation, no-vnode");
1111 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase, 0);
1113 switch(chain->bref.type) {
1114 case HAMMER2_BREF_TYPE_DATA:
1115 hammer2_chain_resize(ip, chain,
1116 hammer2_bytes_to_radix(nblksize),
1118 hammer2_chain_modify(hmp, chain, 0);
1119 bzero(chain->data->buf + loff, nblksize - loff);
1121 case HAMMER2_BREF_TYPE_INODE:
1122 if (loff < HAMMER2_EMBEDDED_BYTES) {
1123 hammer2_chain_modify(hmp, chain, 0);
1124 bzero(chain->data->ipdata.u.data + loff,
1125 HAMMER2_EMBEDDED_BYTES - loff);
1129 hammer2_chain_unlock(hmp, chain);
1135 * Clean up any fragmentory VM pages now that we have properly
1136 * resized the straddling buffer. These pages are no longer
1137 * part of the buffer.
1140 nvtruncbuf(ip->vp, nsize,
1141 nblksize, (int)nsize & (nblksize - 1),
1146 * Destroy any physical blocks after the new EOF point.
1148 lbase = (nsize + HAMMER2_PBUFMASK64) & ~HAMMER2_PBUFMASK64;
1149 chain = hammer2_chain_lookup(hmp, &parent,
1150 lbase, (hammer2_key_t)-1,
1151 HAMMER2_LOOKUP_NODATA);
1154 * Degenerate embedded data case, nothing to loop on.
1156 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
1157 hammer2_chain_unlock(hmp, chain);
1162 * Delete physical data blocks past the file EOF.
1164 if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
1165 ip->delta_dcount -= chain->bytes;
1166 hammer2_chain_delete(hmp, parent, chain, 0);
1168 /* XXX check parent if empty indirect block & delete */
1169 chain = hammer2_chain_next(hmp, &parent, chain,
1170 lbase, (hammer2_key_t)-1,
1171 HAMMER2_LOOKUP_NODATA);
1173 hammer2_chain_unlock(hmp, parent);
1177 * Extend the size of a file. The inode must be locked.
1179 * We may have to resize the block straddling the old EOF.
1183 hammer2_extend_file(hammer2_inode_t *ip, hammer2_key_t nsize)
1185 hammer2_mount_t *hmp;
1186 hammer2_chain_t *parent;
1187 hammer2_chain_t *chain;
1189 hammer2_key_t osize;
1190 hammer2_key_t obase;
1191 hammer2_key_t nbase;
1201 hammer2_chain_modify(hmp, &ip->chain, 0);
1204 * Nothing to do if the direct-data case is still intact
1206 if ((ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) &&
1207 nsize <= HAMMER2_EMBEDDED_BYTES) {
1208 ip->ip_data.size = nsize;
1210 ip->ip_data.size, nsize,
1211 0, HAMMER2_EMBEDDED_BYTES,
1218 * Calculate the blocksize at the original EOF and resize the block
1219 * if necessary. Adjust the file size in the inode.
1221 osize = ip->ip_data.size;
1222 oblksize = hammer2_calc_logical(ip, osize, &obase, &leof);
1223 ip->ip_data.size = nsize;
1224 nblksize = hammer2_calc_logical(ip, osize, &nbase, &leof);
1227 * Do all required vnode operations, but do not mess with the
1228 * buffer straddling the orignal EOF.
1231 ip->ip_data.size, nsize,
1233 0, (int)nsize & HAMMER2_PBUFMASK,
1237 * Early return if we have no more work to do.
1239 if (obase == nbase && oblksize == nblksize &&
1240 (ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) == 0) {
1245 * We have work to do, including possibly resizing the buffer
1246 * at the previous EOF point and turning off DIRECTDATA mode.
1249 if (((int)osize & HAMMER2_PBUFMASK)) {
1250 error = bread(ip->vp, obase, oblksize, &bp);
1251 KKASSERT(error == 0);
1253 if (obase != nbase) {
1254 if (oblksize != HAMMER2_PBUFSIZE)
1255 allocbuf(bp, HAMMER2_PBUFSIZE);
1257 if (oblksize != nblksize)
1258 allocbuf(bp, nblksize);
1263 * Disable direct-data mode by loading up a buffer cache buffer
1264 * with the data, then converting the inode data area into the
1265 * inode indirect block array area.
1267 if (ip->ip_data.op_flags & HAMMER2_OPFLAG_DIRECTDATA) {
1268 ip->ip_data.op_flags &= ~HAMMER2_OPFLAG_DIRECTDATA;
1269 bzero(&ip->ip_data.u.blockset, sizeof(ip->ip_data.u.blockset));
1273 * Resize the chain element at the old EOF.
1275 if (((int)osize & HAMMER2_PBUFMASK)) {
1276 parent = &ip->chain;
1277 error = hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS);
1278 KKASSERT(error == 0);
1280 nradix = hammer2_bytes_to_radix(nblksize);
1282 chain = hammer2_chain_lookup(hmp, &parent,
1284 HAMMER2_LOOKUP_NODATA);
1285 if (chain == NULL) {
1286 chain = hammer2_chain_create(hmp, parent, NULL,
1288 HAMMER2_BREF_TYPE_DATA,
1290 ip->delta_dcount += nblksize;
1292 KKASSERT(chain->bref.type == HAMMER2_BREF_TYPE_DATA);
1293 hammer2_chain_resize(ip, chain, nradix,
1294 HAMMER2_MODIFY_OPTDATA);
1296 bp->b_bio2.bio_offset = chain->bref.data_off &
1298 hammer2_chain_unlock(hmp, chain);
1299 if (bp->b_bcount == HAMMER2_PBUFSIZE)
1300 bp->b_flags |= B_CLUSTEROK;
1302 hammer2_chain_unlock(hmp, parent);
1308 hammer2_vop_nresolve(struct vop_nresolve_args *ap)
1310 hammer2_inode_t *dip;
1311 hammer2_inode_t *ip;
1312 hammer2_mount_t *hmp;
1313 hammer2_chain_t *parent;
1314 hammer2_chain_t *chain;
1315 struct namecache *ncp;
1316 const uint8_t *name;
1322 dip = VTOI(ap->a_dvp);
1324 ncp = ap->a_nch->ncp;
1325 name = ncp->nc_name;
1326 name_len = ncp->nc_nlen;
1327 lhc = hammer2_dirhash(name, name_len);
1330 * Note: In DragonFly the kernel handles '.' and '..'.
1332 parent = &dip->chain;
1333 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS |
1334 HAMMER2_RESOLVE_SHARED);
1335 chain = hammer2_chain_lookup(hmp, &parent,
1336 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1337 HAMMER2_LOOKUP_SHARED);
1339 if (chain->bref.type == HAMMER2_BREF_TYPE_INODE &&
1341 name_len == chain->data->ipdata.name_len &&
1342 bcmp(name, chain->data->ipdata.filename, name_len) == 0) {
1345 chain = hammer2_chain_next(hmp, &parent, chain,
1346 lhc, lhc + HAMMER2_DIRHASH_LOMASK,
1347 HAMMER2_LOOKUP_SHARED);
1349 hammer2_chain_unlock(hmp, parent);
1352 * If the inode represents a forwarding entry for a hardlink we have
1353 * to locate the actual inode. The original ip is saved for possible
1354 * deconsolidation. (ip) will only be set to non-NULL when we have
1355 * to locate the real file via a hardlink. ip will be referenced but
1356 * not locked in that situation. chain is passed in locked and
1359 * XXX what kind of chain lock?
1362 if (chain && chain->u.ip->ip_data.type == HAMMER2_OBJTYPE_HARDLINK) {
1363 error = hammer2_hardlink_find(dip, &chain, &ip);
1365 kprintf("hammer2: unable to find hardlink\n");
1367 hammer2_chain_unlock(hmp, chain);
1375 * Deconsolidate any hardlink whos nlinks == 1. Ignore errors.
1376 * If an error occurs chain and ip are left alone.
1378 * XXX upgrade shared lock?
1380 if (ip && chain && chain->u.ip->ip_data.nlinks == 1 && !hmp->ronly) {
1381 kprintf("hammer2: need to unconsolidate hardlink for %s\n",
1382 chain->u.ip->ip_data.filename);
1383 hammer2_hardlink_deconsolidate(dip, &chain, &ip);
1387 * Acquire the related vnode
1390 vp = hammer2_igetv(chain->u.ip, &error);
1393 cache_setvp(ap->a_nch, vp);
1396 hammer2_chain_unlock(hmp, chain);
1400 cache_setvp(ap->a_nch, NULL);
1403 hammer2_inode_drop(ip);
1409 hammer2_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
1411 hammer2_inode_t *dip;
1412 hammer2_inode_t *ip;
1413 hammer2_mount_t *hmp;
1416 dip = VTOI(ap->a_dvp);
1419 if ((ip = dip->pip) == NULL) {
1423 hammer2_chain_lock(hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
1424 *ap->a_vpp = hammer2_igetv(ip, &error);
1425 hammer2_chain_unlock(hmp, &ip->chain);
1432 hammer2_vop_nmkdir(struct vop_nmkdir_args *ap)
1434 hammer2_mount_t *hmp;
1435 hammer2_inode_t *dip;
1436 hammer2_inode_t *nip;
1437 struct namecache *ncp;
1438 const uint8_t *name;
1442 dip = VTOI(ap->a_dvp);
1447 ncp = ap->a_nch->ncp;
1448 name = ncp->nc_name;
1449 name_len = ncp->nc_nlen;
1451 error = hammer2_inode_create(dip, ap->a_vap, ap->a_cred,
1452 name, name_len, &nip);
1454 KKASSERT(nip == NULL);
1458 *ap->a_vpp = hammer2_igetv(nip, &error);
1459 hammer2_chain_unlock(hmp, &nip->chain);
1462 cache_setunresolved(ap->a_nch);
1463 cache_setvp(ap->a_nch, *ap->a_vpp);
1469 * Return the largest contiguous physical disk range for the logical
1472 * (struct vnode *vp, off_t loffset, off_t *doffsetp, int *runp, int *runb)
1476 hammer2_vop_bmap(struct vop_bmap_args *ap)
1479 hammer2_mount_t *hmp;
1480 hammer2_inode_t *ip;
1481 hammer2_chain_t *parent;
1482 hammer2_chain_t *chain;
1486 hammer2_off_t pbytes;
1487 hammer2_off_t array[HAMMER2_BMAP_COUNT][2];
1492 * Only supported on regular files
1494 * Only supported for read operations (required for cluster_read).
1495 * The block allocation is delayed for write operations.
1498 if (vp->v_type != VREG)
1499 return (EOPNOTSUPP);
1500 if (ap->a_cmd != BUF_CMD_READ)
1501 return (EOPNOTSUPP);
1505 bzero(array, sizeof(array));
1508 * Calculate logical range
1510 KKASSERT((ap->a_loffset & HAMMER2_LBUFMASK64) == 0);
1511 lbeg = ap->a_loffset & HAMMER2_OFF_MASK_HI;
1512 lend = lbeg + HAMMER2_BMAP_COUNT * HAMMER2_PBUFSIZE - 1;
1515 loff = ap->a_loffset & HAMMER2_OFF_MASK_LO;
1517 parent = &ip->chain;
1518 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS |
1519 HAMMER2_RESOLVE_SHARED);
1520 chain = hammer2_chain_lookup(hmp, &parent,
1522 HAMMER2_LOOKUP_NODATA |
1523 HAMMER2_LOOKUP_SHARED);
1524 if (chain == NULL) {
1525 *ap->a_doffsetp = ZFOFFSET;
1526 hammer2_chain_unlock(hmp, parent);
1531 if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
1532 ai = (chain->bref.key - lbeg) / HAMMER2_PBUFSIZE;
1533 KKASSERT(ai >= 0 && ai < HAMMER2_BMAP_COUNT);
1534 array[ai][0] = chain->bref.data_off & HAMMER2_OFF_MASK;
1535 array[ai][1] = chain->bytes;
1537 chain = hammer2_chain_next(hmp, &parent, chain,
1539 HAMMER2_LOOKUP_NODATA |
1540 HAMMER2_LOOKUP_SHARED);
1542 hammer2_chain_unlock(hmp, parent);
1545 * If the requested loffset is not mappable physically we can't
1546 * bmap. The caller will have to access the file data via a
1549 if (array[0][0] == 0 || array[0][1] < loff + HAMMER2_LBUFSIZE) {
1550 *ap->a_doffsetp = NOOFFSET;
1555 * Calculate the physical disk offset range for array[0]
1557 pbeg = array[0][0] + loff;
1558 pbytes = array[0][1] - loff;
1560 for (ai = 1; ai < HAMMER2_BMAP_COUNT; ++ai) {
1561 if (array[ai][0] != pbeg + pbytes)
1563 pbytes += array[ai][1];
1566 *ap->a_doffsetp = pbeg;
1568 *ap->a_runp = pbytes;
1574 hammer2_vop_open(struct vop_open_args *ap)
1576 return vop_stdopen(ap);
1580 * hammer2_vop_advlock { vp, id, op, fl, flags }
1584 hammer2_vop_advlock(struct vop_advlock_args *ap)
1586 hammer2_inode_t *ip = VTOI(ap->a_vp);
1588 return (lf_advlock(ap, &ip->advlock, ip->ip_data.size));
1594 hammer2_vop_close(struct vop_close_args *ap)
1596 return vop_stdclose(ap);
1600 * hammer2_vop_nlink { nch, dvp, vp, cred }
1602 * Create a hardlink from (vp) to {dvp, nch}.
1606 hammer2_vop_nlink(struct vop_nlink_args *ap)
1608 hammer2_inode_t *dip; /* target directory to create link in */
1609 hammer2_inode_t *ip; /* inode we are hardlinking to */
1610 hammer2_inode_t *oip;
1611 hammer2_mount_t *hmp;
1612 struct namecache *ncp;
1613 const uint8_t *name;
1617 dip = VTOI(ap->a_dvp);
1623 * (ip) is the inode we are linking to.
1625 ip = oip = VTOI(ap->a_vp);
1626 hammer2_inode_lock_nlinks(ip);
1628 ncp = ap->a_nch->ncp;
1629 name = ncp->nc_name;
1630 name_len = ncp->nc_nlen;
1633 * Create a consolidated real file for the hardlink, adjust (ip),
1634 * and move the nlinks lock if necessary. Tell the function to
1635 * bump the hardlink count on the consolidated file.
1637 error = hammer2_hardlink_consolidate(&ip, dip);
1642 * If the consolidation changed ip to a HARDLINK pointer we have
1643 * to adjust the vnode to point to the actual ip.
1645 * XXX this can race against concurrent vnode ops.
1648 hammer2_chain_ref(hmp, &ip->chain);
1649 hammer2_inode_lock_ex(ip);
1650 hammer2_inode_lock_ex(oip);
1652 ap->a_vp->v_data = ip;
1654 hammer2_inode_unlock_ex(oip);
1655 hammer2_inode_unlock_ex(ip);
1656 hammer2_chain_drop(hmp, &oip->chain);
1660 * The act of connecting the existing (ip) will properly bump the
1661 * nlinks count. However, vp will incorrectly point at the old
1662 * inode which has now been turned into a OBJTYPE_HARDLINK pointer.
1664 * We must reconnect the vp.
1666 hammer2_chain_lock(hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
1667 error = hammer2_inode_connect(dip, ip, name, name_len);
1668 hammer2_chain_unlock(hmp, &ip->chain);
1670 cache_setunresolved(ap->a_nch);
1671 cache_setvp(ap->a_nch, ap->a_vp);
1674 hammer2_inode_unlock_nlinks(ip);
1679 * hammer2_vop_ncreate { nch, dvp, vpp, cred, vap }
1681 * The operating system has already ensured that the directory entry
1682 * does not exist and done all appropriate namespace locking.
1686 hammer2_vop_ncreate(struct vop_ncreate_args *ap)
1688 hammer2_mount_t *hmp;
1689 hammer2_inode_t *dip;
1690 hammer2_inode_t *nip;
1691 struct namecache *ncp;
1692 const uint8_t *name;
1696 dip = VTOI(ap->a_dvp);
1701 ncp = ap->a_nch->ncp;
1702 name = ncp->nc_name;
1703 name_len = ncp->nc_nlen;
1705 error = hammer2_inode_create(dip, ap->a_vap, ap->a_cred,
1706 name, name_len, &nip);
1708 KKASSERT(nip == NULL);
1712 *ap->a_vpp = hammer2_igetv(nip, &error);
1713 hammer2_chain_unlock(hmp, &nip->chain);
1716 cache_setunresolved(ap->a_nch);
1717 cache_setvp(ap->a_nch, *ap->a_vpp);
1723 * hammer2_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1727 hammer2_vop_nsymlink(struct vop_nsymlink_args *ap)
1729 hammer2_mount_t *hmp;
1730 hammer2_inode_t *dip;
1731 hammer2_inode_t *nip;
1732 struct namecache *ncp;
1733 const uint8_t *name;
1737 dip = VTOI(ap->a_dvp);
1742 ncp = ap->a_nch->ncp;
1743 name = ncp->nc_name;
1744 name_len = ncp->nc_nlen;
1746 ap->a_vap->va_type = VLNK; /* enforce type */
1748 error = hammer2_inode_create(dip, ap->a_vap, ap->a_cred,
1749 name, name_len, &nip);
1751 KKASSERT(nip == NULL);
1755 *ap->a_vpp = hammer2_igetv(nip, &error);
1758 * Build the softlink (~like file data) and finalize the namecache.
1765 bytes = strlen(ap->a_target);
1767 if (bytes <= HAMMER2_EMBEDDED_BYTES) {
1768 KKASSERT(nip->ip_data.op_flags &
1769 HAMMER2_OPFLAG_DIRECTDATA);
1770 bcopy(ap->a_target, nip->ip_data.u.data, bytes);
1771 nip->ip_data.size = bytes;
1773 bzero(&auio, sizeof(auio));
1774 bzero(&aiov, sizeof(aiov));
1775 auio.uio_iov = &aiov;
1776 auio.uio_segflg = UIO_SYSSPACE;
1777 auio.uio_rw = UIO_WRITE;
1778 auio.uio_resid = bytes;
1779 auio.uio_iovcnt = 1;
1780 auio.uio_td = curthread;
1781 aiov.iov_base = ap->a_target;
1782 aiov.iov_len = bytes;
1783 error = hammer2_write_file(nip, &auio, IO_APPEND, 0);
1784 /* XXX handle error */
1788 hammer2_chain_unlock(hmp, &nip->chain);
1791 * Finalize namecache
1794 cache_setunresolved(ap->a_nch);
1795 cache_setvp(ap->a_nch, *ap->a_vpp);
1796 /* hammer2_knote(ap->a_dvp, NOTE_WRITE); */
1802 * hammer2_vop_nremove { nch, dvp, cred }
1806 hammer2_vop_nremove(struct vop_nremove_args *ap)
1808 hammer2_inode_t *dip;
1809 hammer2_mount_t *hmp;
1810 struct namecache *ncp;
1811 const uint8_t *name;
1815 dip = VTOI(ap->a_dvp);
1820 ncp = ap->a_nch->ncp;
1821 name = ncp->nc_name;
1822 name_len = ncp->nc_nlen;
1824 error = hammer2_unlink_file(dip, name, name_len, 0, NULL);
1827 cache_setunresolved(ap->a_nch);
1828 cache_setvp(ap->a_nch, NULL);
1834 * hammer2_vop_nrmdir { nch, dvp, cred }
1838 hammer2_vop_nrmdir(struct vop_nrmdir_args *ap)
1840 hammer2_inode_t *dip;
1841 hammer2_mount_t *hmp;
1842 struct namecache *ncp;
1843 const uint8_t *name;
1847 dip = VTOI(ap->a_dvp);
1852 ncp = ap->a_nch->ncp;
1853 name = ncp->nc_name;
1854 name_len = ncp->nc_nlen;
1856 error = hammer2_unlink_file(dip, name, name_len, 1, NULL);
1859 cache_setunresolved(ap->a_nch);
1860 cache_setvp(ap->a_nch, NULL);
1866 * hammer2_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1870 hammer2_vop_nrename(struct vop_nrename_args *ap)
1872 struct namecache *fncp;
1873 struct namecache *tncp;
1874 hammer2_inode_t *fdip;
1875 hammer2_inode_t *tdip;
1876 hammer2_inode_t *ip;
1877 hammer2_mount_t *hmp;
1878 const uint8_t *fname;
1880 const uint8_t *tname;
1884 if (ap->a_fdvp->v_mount != ap->a_tdvp->v_mount)
1886 if (ap->a_fdvp->v_mount != ap->a_fnch->ncp->nc_vp->v_mount)
1889 fdip = VTOI(ap->a_fdvp); /* source directory */
1890 tdip = VTOI(ap->a_tdvp); /* target directory */
1892 hmp = fdip->hmp; /* check read-only filesystem */
1896 fncp = ap->a_fnch->ncp; /* entry name in source */
1897 fname = fncp->nc_name;
1898 fname_len = fncp->nc_nlen;
1900 tncp = ap->a_tnch->ncp; /* entry name in target */
1901 tname = tncp->nc_name;
1902 tname_len = tncp->nc_nlen;
1905 * ip is the inode being removed. If this is a hardlink then
1906 * ip represents the actual file and not the hardlink marker.
1908 ip = VTOI(fncp->nc_vp);
1911 * Keep a tight grip on the inode as removing it should disconnect
1912 * it and we don't want to destroy it.
1914 * NOTE: To avoid deadlocks we cannot lock (ip) while we are
1915 * unlinking elements from their directories. Locking
1916 * the nlinks field does not lock the whole inode.
1918 hammer2_inode_lock_nlinks(ip);
1921 * Remove target if it exists
1923 error = hammer2_unlink_file(tdip, tname, tname_len, -1, NULL);
1924 if (error && error != ENOENT)
1926 cache_setunresolved(ap->a_tnch);
1927 cache_setvp(ap->a_tnch, NULL);
1930 * Disconnect (fdip, fname) from the source directory. This will
1931 * disconnect (ip) if it represents a direct file. If (ip) represents
1932 * a hardlink the HARDLINK pointer object will be removed but the
1933 * hardlink will stay intact.
1935 * If (ip) is already hardlinked we have to resolve to a consolidated
1936 * file but we do not bump the nlinks count. (ip) must hold the nlinks
1937 * lock & ref for the operation. If the consolidated file has been
1938 * relocated (ip) will be adjusted and the related nlinks lock moved
1941 * If (ip) does not have multiple links we can just copy the physical
1942 * contents of the inode.
1944 if (ip->ip_data.nlinks > 1) {
1945 error = hammer2_hardlink_consolidate(&ip, tdip);
1949 error = hammer2_unlink_file(fdip, fname, fname_len, -1, ip);
1954 * Reconnect ip to target directory.
1956 * WARNING: chain locks can lock buffer cache buffers, to avoid
1957 * deadlocks we want to unlock before issuing a cache_*()
1958 * op (that might have to lock a vnode).
1960 hammer2_chain_lock(hmp, &ip->chain, HAMMER2_RESOLVE_ALWAYS);
1961 error = hammer2_inode_connect(tdip, ip, tname, tname_len);
1962 hammer2_chain_unlock(hmp, &ip->chain);
1965 cache_rename(ap->a_fnch, ap->a_tnch);
1968 hammer2_inode_unlock_nlinks(ip);
1973 static int hammer2_strategy_read(struct vop_strategy_args *ap);
1974 static int hammer2_strategy_write(struct vop_strategy_args *ap);
1978 hammer2_vop_strategy(struct vop_strategy_args *ap)
1989 error = hammer2_strategy_read(ap);
1990 ++hammer2_iod_file_read;
1993 error = hammer2_strategy_write(ap);
1994 ++hammer2_iod_file_write;
1997 bp->b_error = error = EINVAL;
1998 bp->b_flags |= B_ERROR;
2008 hammer2_strategy_read(struct vop_strategy_args *ap)
2013 hammer2_mount_t *hmp;
2014 hammer2_inode_t *ip;
2015 hammer2_chain_t *parent;
2016 hammer2_chain_t *chain;
2017 hammer2_key_t lbase;
2021 ip = VTOI(ap->a_vp);
2023 nbio = push_bio(bio);
2025 lbase = bio->bio_offset;
2027 KKASSERT(((int)lbase & HAMMER2_PBUFMASK) == 0);
2030 * We must characterize the logical->physical translation if it
2031 * has not already been cached.
2033 * Physical data references < LBUFSIZE are never cached. This
2034 * includes both small-block allocations and inode-embedded data.
2036 if (nbio->bio_offset == NOOFFSET) {
2037 parent = &ip->chain;
2038 hammer2_chain_lock(hmp, parent, HAMMER2_RESOLVE_ALWAYS |
2039 HAMMER2_RESOLVE_SHARED);
2041 chain = hammer2_chain_lookup(hmp, &parent, lbase, lbase,
2042 HAMMER2_LOOKUP_NODATA |
2043 HAMMER2_LOOKUP_SHARED);
2044 if (chain == NULL) {
2048 nbio->bio_offset = ZFOFFSET;
2049 } else if (chain->bref.type == HAMMER2_BREF_TYPE_INODE) {
2051 * Data is embedded in the inode (do nothing)
2053 KKASSERT(chain == parent);
2054 hammer2_chain_unlock(hmp, chain);
2055 } else if (chain->bref.type == HAMMER2_BREF_TYPE_DATA) {
2059 KKASSERT(bp->b_bcount == chain->bytes);
2060 nbio->bio_offset = chain->bref.data_off &
2062 hammer2_chain_unlock(hmp, chain);
2063 KKASSERT(nbio->bio_offset != 0);
2065 panic("hammer2_strategy_read: unknown bref type");
2067 hammer2_chain_unlock(hmp, parent);
2070 if (hammer2_debug & 0x0020) {
2071 kprintf("read %016jx %016jx\n",
2072 bio->bio_offset, nbio->bio_offset);
2075 if (nbio->bio_offset == ZFOFFSET) {
2081 bzero(bp->b_data, bp->b_bcount);
2083 } else if (nbio->bio_offset != NOOFFSET) {
2085 * Forward direct IO to the device
2087 vn_strategy(hmp->devvp, nbio);
2090 * Data is embedded in inode.
2092 bcopy(chain->data->ipdata.u.data, bp->b_data,
2093 HAMMER2_EMBEDDED_BYTES);
2094 bzero(bp->b_data + HAMMER2_EMBEDDED_BYTES,
2095 bp->b_bcount - HAMMER2_EMBEDDED_BYTES);
2105 hammer2_strategy_write(struct vop_strategy_args *ap)
2110 hammer2_mount_t *hmp;
2111 hammer2_inode_t *ip;
2115 ip = VTOI(ap->a_vp);
2117 nbio = push_bio(bio);
2119 KKASSERT((bio->bio_offset & HAMMER2_PBUFMASK64) == 0);
2120 KKASSERT(nbio->bio_offset != 0 && nbio->bio_offset != ZFOFFSET);
2122 if (nbio->bio_offset == NOOFFSET) {
2124 * Must be embedded in the inode.
2126 KKASSERT(bio->bio_offset == 0);
2127 bcopy(bp->b_data, ip->ip_data.u.data, HAMMER2_EMBEDDED_BYTES);
2133 * This special flag does not follow the normal MODIFY rules
2134 * because we might deadlock on ip. Instead we depend on
2135 * VOP_FSYNC() to detect the case.
2137 atomic_set_int(&ip->chain.flags, HAMMER2_CHAIN_DIRTYEMBED);
2140 * Forward direct IO to the device
2142 vn_strategy(hmp->devvp, nbio);
2148 * hammer2_vop_ioctl { vp, command, data, fflag, cred }
2152 hammer2_vop_ioctl(struct vop_ioctl_args *ap)
2154 hammer2_mount_t *hmp;
2155 hammer2_inode_t *ip;
2158 ip = VTOI(ap->a_vp);
2161 error = hammer2_ioctl(ip, ap->a_command, (void *)ap->a_data,
2162 ap->a_fflag, ap->a_cred);
2168 hammer2_vop_mountctl(struct vop_mountctl_args *ap)
2171 hammer2_pfsmount_t *pmp;
2175 case (MOUNTCTL_SET_EXPORT):
2176 mp = ap->a_head.a_ops->head.vv_mount;
2179 if (ap->a_ctllen != sizeof(struct export_args))
2182 rc = vfs_export(mp, &pmp->export,
2183 (const struct export_args *)ap->a_ctl);
2186 rc = vop_stdmountctl(ap);
2192 struct vop_ops hammer2_vnode_vops = {
2193 .vop_default = vop_defaultop,
2194 .vop_fsync = hammer2_vop_fsync,
2195 .vop_getpages = vop_stdgetpages,
2196 .vop_putpages = vop_stdputpages,
2197 .vop_access = hammer2_vop_access,
2198 .vop_advlock = hammer2_vop_advlock,
2199 .vop_close = hammer2_vop_close,
2200 .vop_nlink = hammer2_vop_nlink,
2201 .vop_ncreate = hammer2_vop_ncreate,
2202 .vop_nsymlink = hammer2_vop_nsymlink,
2203 .vop_nremove = hammer2_vop_nremove,
2204 .vop_nrmdir = hammer2_vop_nrmdir,
2205 .vop_nrename = hammer2_vop_nrename,
2206 .vop_getattr = hammer2_vop_getattr,
2207 .vop_setattr = hammer2_vop_setattr,
2208 .vop_readdir = hammer2_vop_readdir,
2209 .vop_readlink = hammer2_vop_readlink,
2210 .vop_getpages = vop_stdgetpages,
2211 .vop_putpages = vop_stdputpages,
2212 .vop_read = hammer2_vop_read,
2213 .vop_write = hammer2_vop_write,
2214 .vop_open = hammer2_vop_open,
2215 .vop_inactive = hammer2_vop_inactive,
2216 .vop_reclaim = hammer2_vop_reclaim,
2217 .vop_nresolve = hammer2_vop_nresolve,
2218 .vop_nlookupdotdot = hammer2_vop_nlookupdotdot,
2219 .vop_nmkdir = hammer2_vop_nmkdir,
2220 .vop_ioctl = hammer2_vop_ioctl,
2221 .vop_mountctl = hammer2_vop_mountctl,
2222 .vop_bmap = hammer2_vop_bmap,
2223 .vop_strategy = hammer2_vop_strategy,
2226 struct vop_ops hammer2_spec_vops = {
2230 struct vop_ops hammer2_fifo_vops = {