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, "");
74 #define DE_SIZE (sizeof(struct dirent))
77 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
80 struct componentname cn;
81 struct smb_cred *scred;
82 struct smbfs_fctx *ctx;
84 struct smbnode *np = VTOSMB(vp);
85 int error/*, *eofflag = ap->a_eofflag*/;
89 SMBVDEBUG("dirname='%s'\n", np->n_name);
90 scred = smbfs_malloc_scred();
91 smb_makescred(scred, uio->uio_td, cred);
92 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
93 limit = uio->uio_resid / DE_SIZE;
94 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) {
98 while (limit && offset < 2) {
100 bzero((caddr_t)&de, DE_SIZE);
101 de.d_reclen = DE_SIZE;
102 de.d_fileno = (offset == 0) ? np->n_ino :
103 (np->n_parent ? np->n_parentino : 2);
104 if (de.d_fileno == 0)
105 de.d_fileno = 0x7ffffffd + offset;
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_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
157 de.d_namlen = ctx->f_nmlen;
158 bcopy(ctx->f_name, de.d_name, de.d_namlen);
159 dirent_terminate(&de);
160 if (smbfs_fastlookup) {
161 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
162 ctx->f_nmlen, &ctx->f_attr, &newvp);
164 cn.cn_nameptr = de.d_name;
165 cn.cn_namelen = de.d_namlen;
166 cache_enter(vp, newvp, &cn);
170 error = uiomove(&de, DE_SIZE, uio);
176 uio->uio_offset = offset * DE_SIZE;
178 smbfs_free_scred(scred);
183 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
185 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
186 struct smbnode *np = VTOSMB(vp);
189 struct smb_cred *scred;
193 * Protect against method which is not supported for now
195 if (uiop->uio_segflg == UIO_NOCOPY)
198 if (vp->v_type != VREG && vp->v_type != VDIR) {
199 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
202 if (uiop->uio_resid == 0)
204 if (uiop->uio_offset < 0)
206 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
209 if (vp->v_type == VDIR) {
210 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
211 if (lks == LK_SHARED)
212 vn_lock(vp, LK_UPGRADE | LK_RETRY);
213 error = smbfs_readvdir(vp, uiop, cred);
214 if (lks == LK_SHARED)
215 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
219 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
220 if (np->n_flag & NMODIFIED) {
221 smbfs_attr_cacheremove(vp);
222 error = VOP_GETATTR(vp, &vattr, cred);
225 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
227 error = VOP_GETATTR(vp, &vattr, cred);
230 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
231 error = smbfs_vinvalbuf(vp, td);
234 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
237 scred = smbfs_malloc_scred();
238 smb_makescred(scred, td, cred);
239 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
240 smbfs_free_scred(scred);
245 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
246 struct ucred *cred, int ioflag)
248 struct smbmount *smp = VTOSMBFS(vp);
249 struct smbnode *np = VTOSMB(vp);
250 struct smb_cred *scred;
254 if (vp->v_type != VREG) {
255 SMBERROR("vn types other than VREG unsupported !\n");
258 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
260 if (uiop->uio_offset < 0)
262 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
265 if (ioflag & (IO_APPEND | IO_SYNC)) {
266 if (np->n_flag & NMODIFIED) {
267 smbfs_attr_cacheremove(vp);
268 error = smbfs_vinvalbuf(vp, td);
272 if (ioflag & IO_APPEND) {
275 * File size can be changed by another client
277 smbfs_attr_cacheremove(vp);
278 error = VOP_GETATTR(vp, &vattr, cred);
279 if (error) return (error);
281 uiop->uio_offset = np->n_size;
284 if (uiop->uio_resid == 0)
287 if (vn_rlimit_fsize(vp, uiop, td))
290 scred = smbfs_malloc_scred();
291 smb_makescred(scred, td, cred);
292 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
293 smbfs_free_scred(scred);
294 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
297 if (uiop->uio_offset > np->n_size) {
298 np->n_size = uiop->uio_offset;
299 vnode_pager_setsize(vp, np->n_size);
306 * Do an I/O operation to/from a cache block.
309 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
311 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
312 struct smbnode *np = VTOSMB(vp);
315 struct smb_cred *scred;
318 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
320 uiop->uio_iovcnt = 1;
321 uiop->uio_segflg = UIO_SYSSPACE;
324 scred = smbfs_malloc_scred();
325 smb_makescred(scred, td, cr);
327 if (bp->b_iocmd == BIO_READ) {
328 io.iov_len = uiop->uio_resid = bp->b_bcount;
329 io.iov_base = bp->b_data;
330 uiop->uio_rw = UIO_READ;
331 switch (vp->v_type) {
333 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
334 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
337 if (uiop->uio_resid) {
338 int left = uiop->uio_resid;
339 int nread = bp->b_bcount - left;
341 bzero((char *)bp->b_data + nread, left);
345 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
350 bp->b_ioflags |= BIO_ERROR;
353 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
354 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
356 if (bp->b_dirtyend > bp->b_dirtyoff) {
357 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
358 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
359 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
360 uiop->uio_rw = UIO_WRITE;
361 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
364 * For an interrupted write, the buffer is still valid
365 * and the write hasn't been pushed to the server yet,
366 * so we can't set BIO_ERROR and report the interruption
367 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
368 * is not relevant, so the rpc attempt is essentially
369 * a noop. For the case of a V3 write rpc not being
370 * committed to stable storage, the block is still
371 * dirty and requires either a commit rpc or another
372 * write rpc with iomode == NFSV3WRITE_FILESYNC before
373 * the block is reused. This is indicated by setting
374 * the B_DELWRI and B_NEEDCOMMIT flags.
377 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
378 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
379 if ((bp->b_flags & B_ASYNC) == 0)
380 bp->b_flags |= B_EINTR;
381 if ((bp->b_flags & B_PAGING) == 0) {
383 bp->b_flags &= ~B_DONE;
385 if ((bp->b_flags & B_ASYNC) == 0)
386 bp->b_flags |= B_EINTR;
389 bp->b_ioflags |= BIO_ERROR;
392 bp->b_dirtyoff = bp->b_dirtyend = 0;
397 free(uiop, M_SMBFSDATA);
398 smbfs_free_scred(scred);
402 bp->b_resid = uiop->uio_resid;
404 free(uiop, M_SMBFSDATA);
405 smbfs_free_scred(scred);
410 * Vnode op for VM getpages.
411 * Wish wish .... get rid from multiple IO routines
415 struct vop_getpages_args /* {
422 #ifdef SMBFS_RWGENERIC
423 return vop_stdgetpages(ap);
425 int i, error, nextoff, size, toff, npages, count;
433 struct smbmount *smp;
435 struct smb_cred *scred;
440 if ((object = vp->v_object) == NULL) {
441 printf("smbfs_getpages: called with non-merged cache vnode??\n");
442 return VM_PAGER_ERROR;
445 td = curthread; /* XXX */
446 cred = td->td_ucred; /* XXX */
448 smp = VFSTOSMBFS(vp->v_mount);
450 npages = ap->a_count;
453 * If the requested page is partially valid, just return it and
454 * allow the pager to zero-out the blanks. Partially valid pages
455 * can only occur at the file EOF.
457 * XXXGL: is that true for SMB filesystem?
459 VM_OBJECT_WLOCK(object);
460 if (pages[npages - 1]->valid != 0 && --npages == 0)
462 VM_OBJECT_WUNLOCK(object);
464 scred = smbfs_malloc_scred();
465 smb_makescred(scred, td, cred);
467 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
469 kva = (vm_offset_t) bp->b_data;
470 pmap_qenter(kva, pages, npages);
471 VM_CNT_INC(v_vnodein);
472 VM_CNT_ADD(v_vnodepgsin, npages);
474 count = npages << PAGE_SHIFT;
475 iov.iov_base = (caddr_t) kva;
479 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
480 uio.uio_resid = count;
481 uio.uio_segflg = UIO_SYSSPACE;
482 uio.uio_rw = UIO_READ;
485 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
486 smbfs_free_scred(scred);
487 pmap_qremove(kva, npages);
489 uma_zfree(smbfs_pbuf_zone, bp);
491 if (error && (uio.uio_resid == count)) {
492 printf("smbfs_getpages: error %d\n",error);
493 return VM_PAGER_ERROR;
496 size = count - uio.uio_resid;
498 VM_OBJECT_WLOCK(object);
499 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
501 nextoff = toff + PAGE_SIZE;
504 if (nextoff <= size) {
506 * Read operation filled an entire page
508 m->valid = VM_PAGE_BITS_ALL;
509 KASSERT(m->dirty == 0,
510 ("smbfs_getpages: page %p is dirty", m));
511 } else if (size > toff) {
513 * Read operation filled a partial page.
516 vm_page_set_valid_range(m, 0, size - toff);
517 KASSERT(m->dirty == 0,
518 ("smbfs_getpages: page %p is dirty", m));
521 * Read operation was short. If no error occurred
522 * we may have hit a zero-fill section. We simply
523 * leave valid set to 0.
529 VM_OBJECT_WUNLOCK(object);
534 return (VM_PAGER_OK);
535 #endif /* SMBFS_RWGENERIC */
539 * Vnode op for VM putpages.
540 * possible bug: all IO done in sync mode
541 * Note that vop_close always invalidate pages before close, so it's
542 * not necessary to open vnode.
546 struct vop_putpages_args /* {
555 struct vnode *vp = ap->a_vp;
559 #ifdef SMBFS_RWGENERIC
560 td = curthread; /* XXX */
561 cred = td->td_ucred; /* XXX */
562 VOP_OPEN(vp, FWRITE, cred, td, NULL);
563 error = vop_stdputpages(ap);
564 VOP_CLOSE(vp, FWRITE, cred, td);
571 int i, npages, count;
573 struct smbmount *smp;
575 struct smb_cred *scred;
578 td = curthread; /* XXX */
579 cred = td->td_ucred; /* XXX */
580 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
582 smp = VFSTOSMBFS(vp->v_mount);
585 rtvals = ap->a_rtvals;
586 npages = btoc(count);
588 for (i = 0; i < npages; i++) {
589 rtvals[i] = VM_PAGER_ERROR;
592 bp = uma_zalloc(smbfs_pbuf_zone, M_WAITOK);
594 kva = (vm_offset_t) bp->b_data;
595 pmap_qenter(kva, pages, npages);
596 VM_CNT_INC(v_vnodeout);
597 VM_CNT_ADD(v_vnodepgsout, count);
599 iov.iov_base = (caddr_t) kva;
603 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
604 uio.uio_resid = count;
605 uio.uio_segflg = UIO_SYSSPACE;
606 uio.uio_rw = UIO_WRITE;
608 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
611 scred = smbfs_malloc_scred();
612 smb_makescred(scred, td, cred);
613 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
614 smbfs_free_scred(scred);
615 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
616 SMBVDEBUG("paged write done: %d\n", error);
618 pmap_qremove(kva, npages);
620 uma_zfree(smbfs_pbuf_zone, bp);
623 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
624 npages * PAGE_SIZE, npages * PAGE_SIZE);
627 #endif /* SMBFS_RWGENERIC */
631 * Flush and invalidate all dirty buffers. If another process is already
632 * doing the flush, just wait for completion.
635 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
637 struct smbnode *np = VTOSMB(vp);
640 if (vp->v_iflag & VI_DOOMED)
643 while (np->n_flag & NFLUSHINPROG) {
644 np->n_flag |= NFLUSHWANT;
645 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
646 error = smb_td_intr(td);
650 np->n_flag |= NFLUSHINPROG;
652 if (vp->v_bufobj.bo_object != NULL) {
653 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object);
654 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
655 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object);
658 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
660 if (error == ERESTART || error == EINTR) {
661 np->n_flag &= ~NFLUSHINPROG;
662 if (np->n_flag & NFLUSHWANT) {
663 np->n_flag &= ~NFLUSHWANT;
668 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
670 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
671 if (np->n_flag & NFLUSHWANT) {
672 np->n_flag &= ~NFLUSHWANT;