2 * Copyright (c) 2000-2001 Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
32 #include <sys/kernel.h>
34 #include <sys/fcntl.h>
37 #include <sys/mount.h>
38 #include <sys/namei.h>
39 #include <sys/vnode.h>
40 #include <sys/dirent.h>
41 #include <sys/signalvar.h>
42 #include <sys/sysctl.h>
43 #include <sys/vmmeter.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_extern.h>
48 #include <vm/vm_object.h>
49 #include <vm/vm_pager.h>
50 #include <vm/vnode_pager.h>
52 #include <sys/ioccom.h>
54 #include <netsmb/smb.h>
55 #include <netsmb/smb_conn.h>
56 #include <netsmb/smb_subr.h>
58 #include <fs/smbfs/smbfs.h>
59 #include <fs/smbfs/smbfs_node.h>
60 #include <fs/smbfs/smbfs_subr.h>
62 /*#define SMBFS_RWGENERIC*/
64 extern int smbfs_pbuf_freecnt;
66 static int smbfs_fastlookup = 1;
68 SYSCTL_DECL(_vfs_smbfs);
69 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
72 #define DE_SIZE (sizeof(struct dirent))
75 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
78 struct componentname cn;
79 struct smb_cred scred;
80 struct smbfs_fctx *ctx;
82 struct smbnode *np = VTOSMB(vp);
83 int error/*, *eofflag = ap->a_eofflag*/;
87 SMBVDEBUG("dirname='%s'\n", np->n_name);
88 smb_makescred(&scred, uio->uio_td, cred);
89 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
90 limit = uio->uio_resid / DE_SIZE;
91 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
93 while (limit && offset < 2) {
95 bzero((caddr_t)&de, DE_SIZE);
96 de.d_reclen = DE_SIZE;
97 de.d_fileno = (offset == 0) ? np->n_ino :
98 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2);
100 de.d_fileno = 0x7ffffffd + offset;
101 de.d_namlen = offset + 1;
104 de.d_name[offset + 1] = '\0';
106 error = uiomove(&de, DE_SIZE, uio);
110 uio->uio_offset += DE_SIZE;
114 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
115 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
117 smbfs_findclose(np->n_dirseq, &scred);
121 error = smbfs_findopen(np, "*", 1,
122 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
125 SMBVDEBUG("can not open search, error = %d", error);
131 while (np->n_dirofs < offset) {
132 error = smbfs_findnext(ctx, offset - np->n_dirofs++, &scred);
134 smbfs_findclose(np->n_dirseq, &scred);
136 return error == ENOENT ? 0 : error;
140 for (; limit; limit--, offset++) {
141 error = smbfs_findnext(ctx, limit, &scred);
145 bzero((caddr_t)&de, DE_SIZE);
146 de.d_reclen = DE_SIZE;
147 de.d_fileno = ctx->f_attr.fa_ino;
148 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
149 de.d_namlen = ctx->f_nmlen;
150 bcopy(ctx->f_name, de.d_name, de.d_namlen);
151 de.d_name[de.d_namlen] = '\0';
152 if (smbfs_fastlookup) {
153 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
154 ctx->f_nmlen, &ctx->f_attr, &newvp);
156 cn.cn_nameptr = de.d_name;
157 cn.cn_namelen = de.d_namlen;
158 cache_enter(vp, newvp, &cn);
162 error = uiomove(&de, DE_SIZE, uio);
168 uio->uio_offset = offset * DE_SIZE;
173 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
175 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
176 struct smbnode *np = VTOSMB(vp);
179 struct smb_cred scred;
183 * Protect against method which is not supported for now
185 if (uiop->uio_segflg == UIO_NOCOPY)
188 if (vp->v_type != VREG && vp->v_type != VDIR) {
189 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
192 if (uiop->uio_resid == 0)
194 if (uiop->uio_offset < 0)
196 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
199 if (vp->v_type == VDIR) {
200 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
201 if (lks == LK_SHARED)
202 vn_lock(vp, LK_UPGRADE | LK_RETRY);
203 error = smbfs_readvdir(vp, uiop, cred);
204 if (lks == LK_SHARED)
205 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
209 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
210 if (np->n_flag & NMODIFIED) {
211 smbfs_attr_cacheremove(vp);
212 error = VOP_GETATTR(vp, &vattr, cred);
215 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
217 error = VOP_GETATTR(vp, &vattr, cred);
220 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
221 error = smbfs_vinvalbuf(vp, td);
224 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
227 smb_makescred(&scred, td, cred);
228 return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
232 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
233 struct ucred *cred, int ioflag)
235 struct smbmount *smp = VTOSMBFS(vp);
236 struct smbnode *np = VTOSMB(vp);
237 struct smb_cred scred;
242 if (vp->v_type != VREG) {
243 SMBERROR("vn types other than VREG unsupported !\n");
246 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
247 if (uiop->uio_offset < 0)
249 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
253 if (ioflag & (IO_APPEND | IO_SYNC)) {
254 if (np->n_flag & NMODIFIED) {
255 smbfs_attr_cacheremove(vp);
256 error = smbfs_vinvalbuf(vp, td);
260 if (ioflag & IO_APPEND) {
263 * File size can be changed by another client
265 smbfs_attr_cacheremove(vp);
266 error = VOP_GETATTR(vp, &vattr, cred);
267 if (error) return (error);
269 uiop->uio_offset = np->n_size;
272 if (uiop->uio_resid == 0)
276 if (uiop->uio_offset + uiop->uio_resid >
277 lim_cur(p, RLIMIT_FSIZE)) {
284 smb_makescred(&scred, td, cred);
285 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
286 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
288 if (uiop->uio_offset > np->n_size) {
289 np->n_size = uiop->uio_offset;
290 vnode_pager_setsize(vp, np->n_size);
297 * Do an I/O operation to/from a cache block.
300 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
302 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
303 struct smbnode *np = VTOSMB(vp);
304 struct uio uio, *uiop = &uio;
306 struct smb_cred scred;
310 uiop->uio_iovcnt = 1;
311 uiop->uio_segflg = UIO_SYSSPACE;
314 smb_makescred(&scred, td, cr);
316 if (bp->b_iocmd == BIO_READ) {
317 io.iov_len = uiop->uio_resid = bp->b_bcount;
318 io.iov_base = bp->b_data;
319 uiop->uio_rw = UIO_READ;
320 switch (vp->v_type) {
322 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
323 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred);
326 if (uiop->uio_resid) {
327 int left = uiop->uio_resid;
328 int nread = bp->b_bcount - left;
330 bzero((char *)bp->b_data + nread, left);
334 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
339 bp->b_ioflags |= BIO_ERROR;
342 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
343 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
345 if (bp->b_dirtyend > bp->b_dirtyoff) {
346 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
347 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
348 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
349 uiop->uio_rw = UIO_WRITE;
350 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
353 * For an interrupted write, the buffer is still valid
354 * and the write hasn't been pushed to the server yet,
355 * so we can't set BIO_ERROR and report the interruption
356 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
357 * is not relevant, so the rpc attempt is essentially
358 * a noop. For the case of a V3 write rpc not being
359 * committed to stable storage, the block is still
360 * dirty and requires either a commit rpc or another
361 * write rpc with iomode == NFSV3WRITE_FILESYNC before
362 * the block is reused. This is indicated by setting
363 * the B_DELWRI and B_NEEDCOMMIT flags.
366 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
370 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
371 if ((bp->b_flags & B_ASYNC) == 0)
372 bp->b_flags |= B_EINTR;
373 if ((bp->b_flags & B_PAGING) == 0) {
375 bp->b_flags &= ~B_DONE;
377 if ((bp->b_flags & B_ASYNC) == 0)
378 bp->b_flags |= B_EINTR;
382 bp->b_ioflags |= BIO_ERROR;
385 bp->b_dirtyoff = bp->b_dirtyend = 0;
393 bp->b_resid = uiop->uio_resid;
399 * Vnode op for VM getpages.
400 * Wish wish .... get rid from multiple IO routines
404 struct vop_getpages_args /* {
409 vm_ooffset_t a_offset;
412 #ifdef SMBFS_RWGENERIC
413 return vop_stdgetpages(ap);
415 int i, error, nextoff, size, toff, npages, count, reqpage;
423 struct smbmount *smp;
425 struct smb_cred scred;
430 if ((object = vp->v_object) == NULL) {
431 printf("smbfs_getpages: called with non-merged cache vnode??\n");
432 return VM_PAGER_ERROR;
435 td = curthread; /* XXX */
436 cred = td->td_ucred; /* XXX */
438 smp = VFSTOSMBFS(vp->v_mount);
441 npages = btoc(count);
442 reqpage = ap->a_reqpage;
445 * If the requested page is partially valid, just return it and
446 * allow the pager to zero-out the blanks. Partially valid pages
447 * can only occur at the file EOF.
451 VM_OBJECT_LOCK(object);
453 vm_page_lock_queues();
454 for (i = 0; i < npages; ++i) {
456 vm_page_free(pages[i]);
458 vm_page_unlock_queues();
459 VM_OBJECT_UNLOCK(object);
462 VM_OBJECT_UNLOCK(object);
464 smb_makescred(&scred, td, cred);
466 bp = getpbuf(&smbfs_pbuf_freecnt);
468 kva = (vm_offset_t) bp->b_data;
469 pmap_qenter(kva, pages, npages);
470 PCPU_INC(cnt.v_vnodein);
471 PCPU_ADD(cnt.v_vnodepgsin, npages);
473 iov.iov_base = (caddr_t) kva;
477 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
478 uio.uio_resid = count;
479 uio.uio_segflg = UIO_SYSSPACE;
480 uio.uio_rw = UIO_READ;
483 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
484 pmap_qremove(kva, npages);
486 relpbuf(bp, &smbfs_pbuf_freecnt);
488 VM_OBJECT_LOCK(object);
489 if (error && (uio.uio_resid == count)) {
490 printf("smbfs_getpages: error %d\n",error);
491 vm_page_lock_queues();
492 for (i = 0; i < npages; i++) {
494 vm_page_free(pages[i]);
496 vm_page_unlock_queues();
497 VM_OBJECT_UNLOCK(object);
498 return VM_PAGER_ERROR;
501 size = count - uio.uio_resid;
503 vm_page_lock_queues();
504 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
506 nextoff = toff + PAGE_SIZE;
509 if (nextoff <= size) {
511 * Read operation filled an entire page
513 m->valid = VM_PAGE_BITS_ALL;
514 KASSERT(m->dirty == 0,
515 ("smbfs_getpages: page %p is dirty", m));
516 } else if (size > toff) {
518 * Read operation filled a partial page.
521 vm_page_set_valid(m, 0, size - toff);
522 KASSERT(m->dirty == 0,
523 ("smbfs_getpages: page %p is dirty", m));
526 * Read operation was short. If no error occured
527 * we may have hit a zero-fill section. We simply
528 * leave valid set to 0.
535 * Whether or not to leave the page activated is up in
536 * the air, but we should put the page on a page queue
537 * somewhere (it already is in the object). Result:
538 * It appears that emperical results show that
539 * deactivating pages is best.
543 * Just in case someone was asking for this page we
544 * now tell them that it is ok to use.
547 if (m->oflags & VPO_WANTED)
550 vm_page_deactivate(m);
557 vm_page_unlock_queues();
558 VM_OBJECT_UNLOCK(object);
560 #endif /* SMBFS_RWGENERIC */
564 * Vnode op for VM putpages.
565 * possible bug: all IO done in sync mode
566 * Note that vop_close always invalidate pages before close, so it's
567 * not necessary to open vnode.
571 struct vop_putpages_args /* {
577 vm_ooffset_t a_offset;
581 struct vnode *vp = ap->a_vp;
585 #ifdef SMBFS_RWGENERIC
586 td = curthread; /* XXX */
587 cred = td->td_ucred; /* XXX */
588 VOP_OPEN(vp, FWRITE, cred, td, NULL);
589 error = vop_stdputpages(ap);
590 VOP_CLOSE(vp, FWRITE, cred, td);
597 int i, npages, count;
599 struct smbmount *smp;
601 struct smb_cred scred;
604 td = curthread; /* XXX */
605 cred = td->td_ucred; /* XXX */
606 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
608 smp = VFSTOSMBFS(vp->v_mount);
611 rtvals = ap->a_rtvals;
612 npages = btoc(count);
614 for (i = 0; i < npages; i++) {
615 rtvals[i] = VM_PAGER_AGAIN;
618 bp = getpbuf(&smbfs_pbuf_freecnt);
620 kva = (vm_offset_t) bp->b_data;
621 pmap_qenter(kva, pages, npages);
622 PCPU_INC(cnt.v_vnodeout);
623 PCPU_ADD(cnt.v_vnodepgsout, count);
625 iov.iov_base = (caddr_t) kva;
629 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
630 uio.uio_resid = count;
631 uio.uio_segflg = UIO_SYSSPACE;
632 uio.uio_rw = UIO_WRITE;
634 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
636 smb_makescred(&scred, td, cred);
637 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
638 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
639 SMBVDEBUG("paged write done: %d\n", error);
641 pmap_qremove(kva, npages);
643 relpbuf(bp, &smbfs_pbuf_freecnt);
646 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
647 vm_page_lock_queues();
648 for (i = 0; i < nwritten; i++) {
649 rtvals[i] = VM_PAGER_OK;
650 vm_page_undirty(pages[i]);
652 vm_page_unlock_queues();
655 #endif /* SMBFS_RWGENERIC */
659 * Flush and invalidate all dirty buffers. If another process is already
660 * doing the flush, just wait for completion.
663 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
665 struct smbnode *np = VTOSMB(vp);
668 if (vp->v_iflag & VI_DOOMED)
671 while (np->n_flag & NFLUSHINPROG) {
672 np->n_flag |= NFLUSHWANT;
673 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
674 error = smb_td_intr(td);
678 np->n_flag |= NFLUSHINPROG;
680 if (vp->v_bufobj.bo_object != NULL) {
681 VM_OBJECT_LOCK(vp->v_bufobj.bo_object);
682 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
683 VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object);
686 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
688 if (error == ERESTART || error == EINTR) {
689 np->n_flag &= ~NFLUSHINPROG;
690 if (np->n_flag & NFLUSHWANT) {
691 np->n_flag &= ~NFLUSHWANT;
696 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
698 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
699 if (np->n_flag & NFLUSHWANT) {
700 np->n_flag &= ~NFLUSHWANT;