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_off = offset + 1;
106 de.d_namlen = offset + 1;
110 dirent_terminate(&de);
111 error = uiomove(&de, DE_SIZE, uio);
115 uio->uio_offset += DE_SIZE;
121 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
122 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
124 smbfs_findclose(np->n_dirseq, scred);
128 error = smbfs_findopen(np, "*", 1,
129 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
132 SMBVDEBUG("can not open search, error = %d", error);
138 while (np->n_dirofs < offset) {
139 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
141 smbfs_findclose(np->n_dirseq, scred);
143 error = ENOENT ? 0 : error;
148 for (; limit; limit--, offset++) {
149 error = smbfs_findnext(ctx, limit, scred);
153 bzero((caddr_t)&de, DE_SIZE);
154 de.d_reclen = DE_SIZE;
155 de.d_fileno = ctx->f_attr.fa_ino;
156 de.d_off = offset + 1;
157 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
158 de.d_namlen = ctx->f_nmlen;
159 bcopy(ctx->f_name, de.d_name, de.d_namlen);
160 dirent_terminate(&de);
161 if (smbfs_fastlookup) {
162 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
163 ctx->f_nmlen, &ctx->f_attr, &newvp);
165 cn.cn_nameptr = de.d_name;
166 cn.cn_namelen = de.d_namlen;
167 cache_enter(vp, newvp, &cn);
171 error = uiomove(&de, DE_SIZE, uio);
177 uio->uio_offset = offset * DE_SIZE;
179 smbfs_free_scred(scred);
184 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
186 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
187 struct smbnode *np = VTOSMB(vp);
190 struct smb_cred *scred;
194 * Protect against method which is not supported for now
196 if (uiop->uio_segflg == UIO_NOCOPY)
199 if (vp->v_type != VREG && vp->v_type != VDIR) {
200 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
203 if (uiop->uio_resid == 0)
205 if (uiop->uio_offset < 0)
207 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
210 if (vp->v_type == VDIR) {
211 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
212 if (lks == LK_SHARED)
213 vn_lock(vp, LK_UPGRADE | LK_RETRY);
214 error = smbfs_readvdir(vp, uiop, cred);
215 if (lks == LK_SHARED)
216 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
220 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
221 if (np->n_flag & NMODIFIED) {
222 smbfs_attr_cacheremove(vp);
223 error = VOP_GETATTR(vp, &vattr, cred);
226 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
228 error = VOP_GETATTR(vp, &vattr, cred);
231 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
232 error = smbfs_vinvalbuf(vp, td);
235 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
238 scred = smbfs_malloc_scred();
239 smb_makescred(scred, td, cred);
240 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
241 smbfs_free_scred(scred);
246 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
247 struct ucred *cred, int ioflag)
249 struct smbmount *smp = VTOSMBFS(vp);
250 struct smbnode *np = VTOSMB(vp);
251 struct smb_cred *scred;
255 if (vp->v_type != VREG) {
256 SMBERROR("vn types other than VREG unsupported !\n");
259 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
261 if (uiop->uio_offset < 0)
263 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
266 if (ioflag & (IO_APPEND | IO_SYNC)) {
267 if (np->n_flag & NMODIFIED) {
268 smbfs_attr_cacheremove(vp);
269 error = smbfs_vinvalbuf(vp, td);
273 if (ioflag & IO_APPEND) {
276 * File size can be changed by another client
278 smbfs_attr_cacheremove(vp);
279 error = VOP_GETATTR(vp, &vattr, cred);
280 if (error) return (error);
282 uiop->uio_offset = np->n_size;
285 if (uiop->uio_resid == 0)
288 if (vn_rlimit_fsize(vp, uiop, td))
291 scred = smbfs_malloc_scred();
292 smb_makescred(scred, td, cred);
293 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
294 smbfs_free_scred(scred);
295 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
298 if (uiop->uio_offset > np->n_size) {
299 np->n_size = uiop->uio_offset;
300 vnode_pager_setsize(vp, np->n_size);
307 * Do an I/O operation to/from a cache block.
310 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
312 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
313 struct smbnode *np = VTOSMB(vp);
316 struct smb_cred *scred;
319 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
321 uiop->uio_iovcnt = 1;
322 uiop->uio_segflg = UIO_SYSSPACE;
325 scred = smbfs_malloc_scred();
326 smb_makescred(scred, td, cr);
328 if (bp->b_iocmd == BIO_READ) {
329 io.iov_len = uiop->uio_resid = bp->b_bcount;
330 io.iov_base = bp->b_data;
331 uiop->uio_rw = UIO_READ;
332 switch (vp->v_type) {
334 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
335 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
338 if (uiop->uio_resid) {
339 int left = uiop->uio_resid;
340 int nread = bp->b_bcount - left;
342 bzero((char *)bp->b_data + nread, left);
346 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
351 bp->b_ioflags |= BIO_ERROR;
354 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
355 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
357 if (bp->b_dirtyend > bp->b_dirtyoff) {
358 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
359 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
360 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
361 uiop->uio_rw = UIO_WRITE;
362 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
365 * For an interrupted write, the buffer is still valid
366 * and the write hasn't been pushed to the server yet,
367 * so we can't set BIO_ERROR and report the interruption
368 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
369 * is not relevant, so the rpc attempt is essentially
370 * a noop. For the case of a V3 write rpc not being
371 * committed to stable storage, the block is still
372 * dirty and requires either a commit rpc or another
373 * write rpc with iomode == NFSV3WRITE_FILESYNC before
374 * the block is reused. This is indicated by setting
375 * the B_DELWRI and B_NEEDCOMMIT flags.
378 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
379 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
380 if ((bp->b_flags & B_ASYNC) == 0)
381 bp->b_flags |= B_EINTR;
382 if ((bp->b_flags & B_PAGING) == 0) {
384 bp->b_flags &= ~B_DONE;
386 if ((bp->b_flags & B_ASYNC) == 0)
387 bp->b_flags |= B_EINTR;
390 bp->b_ioflags |= BIO_ERROR;
393 bp->b_dirtyoff = bp->b_dirtyend = 0;
398 free(uiop, M_SMBFSDATA);
399 smbfs_free_scred(scred);
403 bp->b_resid = uiop->uio_resid;
405 free(uiop, M_SMBFSDATA);
406 smbfs_free_scred(scred);
411 * Vnode op for VM getpages.
412 * Wish wish .... get rid from multiple IO routines
416 struct vop_getpages_args /* {
423 #ifdef SMBFS_RWGENERIC
424 return vop_stdgetpages(ap);
426 int i, error, nextoff, size, toff, npages, count;
434 struct smbmount *smp;
436 struct smb_cred *scred;
441 if ((object = vp->v_object) == NULL) {
442 printf("smbfs_getpages: called with non-merged cache vnode??\n");
443 return VM_PAGER_ERROR;
446 td = curthread; /* XXX */
447 cred = td->td_ucred; /* XXX */
449 smp = VFSTOSMBFS(vp->v_mount);
451 npages = ap->a_count;
454 * If the requested page is partially valid, just return it and
455 * allow the pager to zero-out the blanks. Partially valid pages
456 * can only occur at the file EOF.
458 * XXXGL: is that true for SMB filesystem?
460 VM_OBJECT_WLOCK(object);
461 if (!vm_page_none_valid(pages[npages - 1]) && --npages == 0)
463 VM_OBJECT_WUNLOCK(object);
465 scred = smbfs_malloc_scred();
466 smb_makescred(scred, td, cred);
468 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
470 kva = (vm_offset_t) bp->b_data;
471 pmap_qenter(kva, pages, npages);
472 VM_CNT_INC(v_vnodein);
473 VM_CNT_ADD(v_vnodepgsin, npages);
475 count = npages << PAGE_SHIFT;
476 iov.iov_base = (caddr_t) kva;
480 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
481 uio.uio_resid = count;
482 uio.uio_segflg = UIO_SYSSPACE;
483 uio.uio_rw = UIO_READ;
486 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
487 smbfs_free_scred(scred);
488 pmap_qremove(kva, npages);
490 uma_zfree(smbfs_pbuf_zone, bp);
492 if (error && (uio.uio_resid == count)) {
493 printf("smbfs_getpages: error %d\n",error);
494 return VM_PAGER_ERROR;
497 size = count - uio.uio_resid;
499 VM_OBJECT_WLOCK(object);
500 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
502 nextoff = toff + PAGE_SIZE;
505 if (nextoff <= size) {
507 * Read operation filled an entire page
510 KASSERT(m->dirty == 0,
511 ("smbfs_getpages: page %p is dirty", m));
512 } else if (size > toff) {
514 * Read operation filled a partial page.
517 vm_page_set_valid_range(m, 0, size - toff);
518 KASSERT(m->dirty == 0,
519 ("smbfs_getpages: page %p is dirty", m));
522 * Read operation was short. If no error occurred
523 * we may have hit a zero-fill section. We simply
524 * leave valid set to 0.
530 VM_OBJECT_WUNLOCK(object);
535 return (VM_PAGER_OK);
536 #endif /* SMBFS_RWGENERIC */
540 * Vnode op for VM putpages.
541 * possible bug: all IO done in sync mode
542 * Note that vop_close always invalidate pages before close, so it's
543 * not necessary to open vnode.
547 struct vop_putpages_args /* {
556 struct vnode *vp = ap->a_vp;
560 #ifdef SMBFS_RWGENERIC
561 td = curthread; /* XXX */
562 cred = td->td_ucred; /* XXX */
563 VOP_OPEN(vp, FWRITE, cred, td, NULL);
564 error = vop_stdputpages(ap);
565 VOP_CLOSE(vp, FWRITE, cred, td);
572 int i, npages, count;
574 struct smbmount *smp;
576 struct smb_cred *scred;
579 td = curthread; /* XXX */
580 cred = td->td_ucred; /* XXX */
581 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
583 smp = VFSTOSMBFS(vp->v_mount);
586 rtvals = ap->a_rtvals;
587 npages = btoc(count);
589 for (i = 0; i < npages; i++) {
590 rtvals[i] = VM_PAGER_ERROR;
593 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
595 kva = (vm_offset_t) bp->b_data;
596 pmap_qenter(kva, pages, npages);
597 VM_CNT_INC(v_vnodeout);
598 VM_CNT_ADD(v_vnodepgsout, count);
600 iov.iov_base = (caddr_t) kva;
604 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
605 uio.uio_resid = count;
606 uio.uio_segflg = UIO_SYSSPACE;
607 uio.uio_rw = UIO_WRITE;
609 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
612 scred = smbfs_malloc_scred();
613 smb_makescred(scred, td, cred);
614 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
615 smbfs_free_scred(scred);
616 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
617 SMBVDEBUG("paged write done: %d\n", error);
619 pmap_qremove(kva, npages);
621 uma_zfree(smbfs_pbuf_zone, bp);
624 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
625 npages * PAGE_SIZE, npages * PAGE_SIZE);
628 #endif /* SMBFS_RWGENERIC */
632 * Flush and invalidate all dirty buffers. If another process is already
633 * doing the flush, just wait for completion.
636 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
638 struct smbnode *np = VTOSMB(vp);
641 if (VN_IS_DOOMED(vp))
644 while (np->n_flag & NFLUSHINPROG) {
645 np->n_flag |= NFLUSHWANT;
646 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
647 error = smb_td_intr(td);
651 np->n_flag |= NFLUSHINPROG;
653 if (vp->v_bufobj.bo_object != NULL) {
654 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object);
655 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
656 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object);
659 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
661 if (error == ERESTART || error == EINTR) {
662 np->n_flag &= ~NFLUSHINPROG;
663 if (np->n_flag & NFLUSHWANT) {
664 np->n_flag &= ~NFLUSHWANT;
669 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
671 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
672 if (np->n_flag & NFLUSHWANT) {
673 np->n_flag &= ~NFLUSHWANT;