2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2000-2001 Boris Popov
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #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/rwlock.h>
42 #include <sys/signalvar.h>
43 #include <sys/sysctl.h>
44 #include <sys/vmmeter.h>
47 #include <vm/vm_param.h>
48 #include <vm/vm_page.h>
49 #include <vm/vm_extern.h>
50 #include <vm/vm_object.h>
51 #include <vm/vm_pager.h>
52 #include <vm/vnode_pager.h>
54 #include <sys/ioccom.h>
56 #include <netsmb/smb.h>
57 #include <netsmb/smb_conn.h>
58 #include <netsmb/smb_subr.h>
60 #include <fs/smbfs/smbfs.h>
61 #include <fs/smbfs/smbfs_node.h>
62 #include <fs/smbfs/smbfs_subr.h>
64 /*#define SMBFS_RWGENERIC*/
66 extern uma_zone_t smbfs_pbuf_zone;
68 static int smbfs_fastlookup = 1;
70 SYSCTL_DECL(_vfs_smbfs);
71 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
73 #define DE_SIZE (sizeof(struct dirent))
76 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
79 struct componentname cn;
80 struct smb_cred *scred;
81 struct smbfs_fctx *ctx;
83 struct smbnode *np = VTOSMB(vp);
84 int error/*, *eofflag = ap->a_eofflag*/;
88 SMBVDEBUG("dirname='%s'\n", np->n_name);
89 scred = smbfs_malloc_scred();
90 smb_makescred(scred, uio->uio_td, cred);
91 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
92 limit = uio->uio_resid / DE_SIZE;
93 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) {
97 while (limit && offset < 2) {
99 bzero((caddr_t)&de, DE_SIZE);
100 de.d_reclen = DE_SIZE;
101 de.d_fileno = (offset == 0) ? np->n_ino :
102 (np->n_parent ? np->n_parentino : 2);
103 if (de.d_fileno == 0)
104 de.d_fileno = 0x7ffffffd + offset;
105 de.d_namlen = offset + 1;
109 dirent_terminate(&de);
110 error = uiomove(&de, DE_SIZE, uio);
114 uio->uio_offset += DE_SIZE;
120 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
121 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
123 smbfs_findclose(np->n_dirseq, scred);
127 error = smbfs_findopen(np, "*", 1,
128 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
131 SMBVDEBUG("can not open search, error = %d", error);
137 while (np->n_dirofs < offset) {
138 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
140 smbfs_findclose(np->n_dirseq, scred);
142 error = ENOENT ? 0 : error;
147 for (; limit; limit--, offset++) {
148 error = smbfs_findnext(ctx, limit, scred);
152 bzero((caddr_t)&de, DE_SIZE);
153 de.d_reclen = DE_SIZE;
154 de.d_fileno = ctx->f_attr.fa_ino;
155 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
156 de.d_namlen = ctx->f_nmlen;
157 bcopy(ctx->f_name, de.d_name, de.d_namlen);
158 dirent_terminate(&de);
159 if (smbfs_fastlookup) {
160 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
161 ctx->f_nmlen, &ctx->f_attr, &newvp);
163 cn.cn_nameptr = de.d_name;
164 cn.cn_namelen = de.d_namlen;
165 cache_enter(vp, newvp, &cn);
169 error = uiomove(&de, DE_SIZE, uio);
175 uio->uio_offset = offset * DE_SIZE;
177 smbfs_free_scred(scred);
182 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
184 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
185 struct smbnode *np = VTOSMB(vp);
188 struct smb_cred *scred;
192 * Protect against method which is not supported for now
194 if (uiop->uio_segflg == UIO_NOCOPY)
197 if (vp->v_type != VREG && vp->v_type != VDIR) {
198 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
201 if (uiop->uio_resid == 0)
203 if (uiop->uio_offset < 0)
205 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
208 if (vp->v_type == VDIR) {
209 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
210 if (lks == LK_SHARED)
211 vn_lock(vp, LK_UPGRADE | LK_RETRY);
212 error = smbfs_readvdir(vp, uiop, cred);
213 if (lks == LK_SHARED)
214 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
218 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
219 if (np->n_flag & NMODIFIED) {
220 smbfs_attr_cacheremove(vp);
221 error = VOP_GETATTR(vp, &vattr, cred);
224 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
226 error = VOP_GETATTR(vp, &vattr, cred);
229 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
230 error = smbfs_vinvalbuf(vp, td);
233 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
236 scred = smbfs_malloc_scred();
237 smb_makescred(scred, td, cred);
238 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
239 smbfs_free_scred(scred);
244 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
245 struct ucred *cred, int ioflag)
247 struct smbmount *smp = VTOSMBFS(vp);
248 struct smbnode *np = VTOSMB(vp);
249 struct smb_cred *scred;
253 if (vp->v_type != VREG) {
254 SMBERROR("vn types other than VREG unsupported !\n");
257 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
259 if (uiop->uio_offset < 0)
261 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
264 if (ioflag & (IO_APPEND | IO_SYNC)) {
265 if (np->n_flag & NMODIFIED) {
266 smbfs_attr_cacheremove(vp);
267 error = smbfs_vinvalbuf(vp, td);
271 if (ioflag & IO_APPEND) {
274 * File size can be changed by another client
276 smbfs_attr_cacheremove(vp);
277 error = VOP_GETATTR(vp, &vattr, cred);
278 if (error) return (error);
280 uiop->uio_offset = np->n_size;
283 if (uiop->uio_resid == 0)
286 if (vn_rlimit_fsize(vp, uiop, td))
289 scred = smbfs_malloc_scred();
290 smb_makescred(scred, td, cred);
291 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
292 smbfs_free_scred(scred);
293 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
296 if (uiop->uio_offset > np->n_size) {
297 np->n_size = uiop->uio_offset;
298 vnode_pager_setsize(vp, np->n_size);
305 * Do an I/O operation to/from a cache block.
308 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
310 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
311 struct smbnode *np = VTOSMB(vp);
314 struct smb_cred *scred;
317 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
319 uiop->uio_iovcnt = 1;
320 uiop->uio_segflg = UIO_SYSSPACE;
323 scred = smbfs_malloc_scred();
324 smb_makescred(scred, td, cr);
326 if (bp->b_iocmd == BIO_READ) {
327 io.iov_len = uiop->uio_resid = bp->b_bcount;
328 io.iov_base = bp->b_data;
329 uiop->uio_rw = UIO_READ;
330 switch (vp->v_type) {
332 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
333 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
336 if (uiop->uio_resid) {
337 int left = uiop->uio_resid;
338 int nread = bp->b_bcount - left;
340 bzero((char *)bp->b_data + nread, left);
344 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
349 bp->b_ioflags |= BIO_ERROR;
352 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
353 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
355 if (bp->b_dirtyend > bp->b_dirtyoff) {
356 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
357 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
358 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
359 uiop->uio_rw = UIO_WRITE;
360 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
363 * For an interrupted write, the buffer is still valid
364 * and the write hasn't been pushed to the server yet,
365 * so we can't set BIO_ERROR and report the interruption
366 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
367 * is not relevant, so the rpc attempt is essentially
368 * a noop. For the case of a V3 write rpc not being
369 * committed to stable storage, the block is still
370 * dirty and requires either a commit rpc or another
371 * write rpc with iomode == NFSV3WRITE_FILESYNC before
372 * the block is reused. This is indicated by setting
373 * the B_DELWRI and B_NEEDCOMMIT flags.
376 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
377 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
378 if ((bp->b_flags & B_ASYNC) == 0)
379 bp->b_flags |= B_EINTR;
380 if ((bp->b_flags & B_PAGING) == 0) {
382 bp->b_flags &= ~B_DONE;
384 if ((bp->b_flags & B_ASYNC) == 0)
385 bp->b_flags |= B_EINTR;
388 bp->b_ioflags |= BIO_ERROR;
391 bp->b_dirtyoff = bp->b_dirtyend = 0;
396 free(uiop, M_SMBFSDATA);
397 smbfs_free_scred(scred);
401 bp->b_resid = uiop->uio_resid;
403 free(uiop, M_SMBFSDATA);
404 smbfs_free_scred(scred);
409 * Vnode op for VM getpages.
410 * Wish wish .... get rid from multiple IO routines
414 struct vop_getpages_args /* {
421 #ifdef SMBFS_RWGENERIC
422 return vop_stdgetpages(ap);
424 int i, error, nextoff, size, toff, npages, count;
432 struct smbmount *smp;
434 struct smb_cred *scred;
439 if ((object = vp->v_object) == NULL) {
440 printf("smbfs_getpages: called with non-merged cache vnode??\n");
441 return VM_PAGER_ERROR;
444 td = curthread; /* XXX */
445 cred = td->td_ucred; /* XXX */
447 smp = VFSTOSMBFS(vp->v_mount);
449 npages = ap->a_count;
452 * If the requested page is partially valid, just return it and
453 * allow the pager to zero-out the blanks. Partially valid pages
454 * can only occur at the file EOF.
456 * XXXGL: is that true for SMB filesystem?
458 VM_OBJECT_WLOCK(object);
459 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0)
461 VM_OBJECT_WUNLOCK(object);
463 scred = smbfs_malloc_scred();
464 smb_makescred(scred, td, cred);
466 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
468 kva = (vm_offset_t) bp->b_data;
469 pmap_qenter(kva, pages, npages);
470 VM_CNT_INC(v_vnodein);
471 VM_CNT_ADD(v_vnodepgsin, npages);
473 count = npages << PAGE_SHIFT;
474 iov.iov_base = (caddr_t) kva;
478 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
479 uio.uio_resid = count;
480 uio.uio_segflg = UIO_SYSSPACE;
481 uio.uio_rw = UIO_READ;
484 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
485 smbfs_free_scred(scred);
486 pmap_qremove(kva, npages);
488 uma_zfree(smbfs_pbuf_zone, bp);
490 if (error && (uio.uio_resid == count)) {
491 printf("smbfs_getpages: error %d\n",error);
492 return VM_PAGER_ERROR;
495 size = count - uio.uio_resid;
497 VM_OBJECT_WLOCK(object);
498 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
500 nextoff = toff + PAGE_SIZE;
503 if (nextoff <= size) {
505 * Read operation filled an entire page
508 KASSERT(m->dirty == 0,
509 ("smbfs_getpages: page %p is dirty", m));
510 } else if (size > toff) {
512 * Read operation filled a partial page.
515 vm_page_set_valid_range(m, 0, size - toff);
516 KASSERT(m->dirty == 0,
517 ("smbfs_getpages: page %p is dirty", m));
520 * Read operation was short. If no error occurred
521 * we may have hit a zero-fill section. We simply
522 * leave valid set to 0.
528 VM_OBJECT_WUNLOCK(object);
533 return (VM_PAGER_OK);
534 #endif /* SMBFS_RWGENERIC */
538 * Vnode op for VM putpages.
539 * possible bug: all IO done in sync mode
540 * Note that vop_close always invalidate pages before close, so it's
541 * not necessary to open vnode.
545 struct vop_putpages_args /* {
554 struct vnode *vp = ap->a_vp;
558 #ifdef SMBFS_RWGENERIC
559 td = curthread; /* XXX */
560 cred = td->td_ucred; /* XXX */
561 VOP_OPEN(vp, FWRITE, cred, td, NULL);
562 error = vop_stdputpages(ap);
563 VOP_CLOSE(vp, FWRITE, cred, td);
570 int i, npages, count;
572 struct smbmount *smp;
574 struct smb_cred *scred;
577 td = curthread; /* XXX */
578 cred = td->td_ucred; /* XXX */
579 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
581 smp = VFSTOSMBFS(vp->v_mount);
584 rtvals = ap->a_rtvals;
585 npages = btoc(count);
587 for (i = 0; i < npages; i++) {
588 rtvals[i] = VM_PAGER_ERROR;
591 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
593 kva = (vm_offset_t) bp->b_data;
594 pmap_qenter(kva, pages, npages);
595 VM_CNT_INC(v_vnodeout);
596 VM_CNT_ADD(v_vnodepgsout, count);
598 iov.iov_base = (caddr_t) kva;
602 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
603 uio.uio_resid = count;
604 uio.uio_segflg = UIO_SYSSPACE;
605 uio.uio_rw = UIO_WRITE;
607 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
610 scred = smbfs_malloc_scred();
611 smb_makescred(scred, td, cred);
612 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
613 smbfs_free_scred(scred);
614 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
615 SMBVDEBUG("paged write done: %d\n", error);
617 pmap_qremove(kva, npages);
619 uma_zfree(smbfs_pbuf_zone, bp);
622 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
623 npages * PAGE_SIZE, npages * PAGE_SIZE);
626 #endif /* SMBFS_RWGENERIC */
630 * Flush and invalidate all dirty buffers. If another process is already
631 * doing the flush, just wait for completion.
634 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
636 struct smbnode *np = VTOSMB(vp);
639 if (VN_IS_DOOMED(vp))
642 while (np->n_flag & NFLUSHINPROG) {
643 np->n_flag |= NFLUSHWANT;
644 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
645 error = smb_td_intr(td);
649 np->n_flag |= NFLUSHINPROG;
651 if (vp->v_bufobj.bo_object != NULL) {
652 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object);
653 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
654 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object);
657 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
659 if (error == ERESTART || error == EINTR) {
660 np->n_flag &= ~NFLUSHINPROG;
661 if (np->n_flag & NFLUSHWANT) {
662 np->n_flag &= ~NFLUSHWANT;
667 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
669 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
670 if (np->n_flag & NFLUSHWANT) {
671 np->n_flag &= ~NFLUSHWANT;