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 int smbfs_pbuf_freecnt;
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))) {
381 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
382 if ((bp->b_flags & B_ASYNC) == 0)
383 bp->b_flags |= B_EINTR;
384 if ((bp->b_flags & B_PAGING) == 0) {
386 bp->b_flags &= ~B_DONE;
388 if ((bp->b_flags & B_ASYNC) == 0)
389 bp->b_flags |= B_EINTR;
393 bp->b_ioflags |= BIO_ERROR;
396 bp->b_dirtyoff = bp->b_dirtyend = 0;
401 free(uiop, M_SMBFSDATA);
402 smbfs_free_scred(scred);
406 bp->b_resid = uiop->uio_resid;
408 free(uiop, M_SMBFSDATA);
409 smbfs_free_scred(scred);
414 * Vnode op for VM getpages.
415 * Wish wish .... get rid from multiple IO routines
419 struct vop_getpages_args /* {
426 #ifdef SMBFS_RWGENERIC
427 return vop_stdgetpages(ap);
429 int i, error, nextoff, size, toff, npages, count;
437 struct smbmount *smp;
439 struct smb_cred *scred;
444 if ((object = vp->v_object) == NULL) {
445 printf("smbfs_getpages: called with non-merged cache vnode??\n");
446 return VM_PAGER_ERROR;
449 td = curthread; /* XXX */
450 cred = td->td_ucred; /* XXX */
452 smp = VFSTOSMBFS(vp->v_mount);
454 npages = ap->a_count;
457 * If the requested page is partially valid, just return it and
458 * allow the pager to zero-out the blanks. Partially valid pages
459 * can only occur at the file EOF.
461 * XXXGL: is that true for SMB filesystem?
463 VM_OBJECT_WLOCK(object);
464 if (pages[npages - 1]->valid != 0 && --npages == 0)
466 VM_OBJECT_WUNLOCK(object);
468 scred = smbfs_malloc_scred();
469 smb_makescred(scred, td, cred);
471 bp = getpbuf(&smbfs_pbuf_freecnt);
473 kva = (vm_offset_t) bp->b_data;
474 pmap_qenter(kva, pages, npages);
475 VM_CNT_INC(v_vnodein);
476 VM_CNT_ADD(v_vnodepgsin, npages);
478 count = npages << PAGE_SHIFT;
479 iov.iov_base = (caddr_t) kva;
483 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
484 uio.uio_resid = count;
485 uio.uio_segflg = UIO_SYSSPACE;
486 uio.uio_rw = UIO_READ;
489 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
490 smbfs_free_scred(scred);
491 pmap_qremove(kva, npages);
493 relpbuf(bp, &smbfs_pbuf_freecnt);
495 if (error && (uio.uio_resid == count)) {
496 printf("smbfs_getpages: error %d\n",error);
497 return VM_PAGER_ERROR;
500 size = count - uio.uio_resid;
502 VM_OBJECT_WLOCK(object);
503 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
505 nextoff = toff + PAGE_SIZE;
508 if (nextoff <= size) {
510 * Read operation filled an entire page
512 m->valid = VM_PAGE_BITS_ALL;
513 KASSERT(m->dirty == 0,
514 ("smbfs_getpages: page %p is dirty", m));
515 } else if (size > toff) {
517 * Read operation filled a partial page.
520 vm_page_set_valid_range(m, 0, size - toff);
521 KASSERT(m->dirty == 0,
522 ("smbfs_getpages: page %p is dirty", m));
525 * Read operation was short. If no error occurred
526 * we may have hit a zero-fill section. We simply
527 * leave valid set to 0.
533 VM_OBJECT_WUNLOCK(object);
538 return (VM_PAGER_OK);
539 #endif /* SMBFS_RWGENERIC */
543 * Vnode op for VM putpages.
544 * possible bug: all IO done in sync mode
545 * Note that vop_close always invalidate pages before close, so it's
546 * not necessary to open vnode.
550 struct vop_putpages_args /* {
559 struct vnode *vp = ap->a_vp;
563 #ifdef SMBFS_RWGENERIC
564 td = curthread; /* XXX */
565 cred = td->td_ucred; /* XXX */
566 VOP_OPEN(vp, FWRITE, cred, td, NULL);
567 error = vop_stdputpages(ap);
568 VOP_CLOSE(vp, FWRITE, cred, td);
575 int i, npages, count;
577 struct smbmount *smp;
579 struct smb_cred *scred;
582 td = curthread; /* XXX */
583 cred = td->td_ucred; /* XXX */
584 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
586 smp = VFSTOSMBFS(vp->v_mount);
589 rtvals = ap->a_rtvals;
590 npages = btoc(count);
592 for (i = 0; i < npages; i++) {
593 rtvals[i] = VM_PAGER_ERROR;
596 bp = getpbuf(&smbfs_pbuf_freecnt);
598 kva = (vm_offset_t) bp->b_data;
599 pmap_qenter(kva, pages, npages);
600 VM_CNT_INC(v_vnodeout);
601 VM_CNT_ADD(v_vnodepgsout, count);
603 iov.iov_base = (caddr_t) kva;
607 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
608 uio.uio_resid = count;
609 uio.uio_segflg = UIO_SYSSPACE;
610 uio.uio_rw = UIO_WRITE;
612 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
615 scred = smbfs_malloc_scred();
616 smb_makescred(scred, td, cred);
617 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
618 smbfs_free_scred(scred);
619 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
620 SMBVDEBUG("paged write done: %d\n", error);
622 pmap_qremove(kva, npages);
624 relpbuf(bp, &smbfs_pbuf_freecnt);
627 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
628 npages * PAGE_SIZE, npages * PAGE_SIZE);
631 #endif /* SMBFS_RWGENERIC */
635 * Flush and invalidate all dirty buffers. If another process is already
636 * doing the flush, just wait for completion.
639 smbfs_vinvalbuf(struct vnode *vp, struct thread *td)
641 struct smbnode *np = VTOSMB(vp);
644 if (vp->v_iflag & VI_DOOMED)
647 while (np->n_flag & NFLUSHINPROG) {
648 np->n_flag |= NFLUSHWANT;
649 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
650 error = smb_td_intr(td);
654 np->n_flag |= NFLUSHINPROG;
656 if (vp->v_bufobj.bo_object != NULL) {
657 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object);
658 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
659 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object);
662 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
664 if (error == ERESTART || error == EINTR) {
665 np->n_flag &= ~NFLUSHINPROG;
666 if (np->n_flag & NFLUSHWANT) {
667 np->n_flag &= ~NFLUSHWANT;
672 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
674 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
675 if (np->n_flag & NFLUSHWANT) {
676 np->n_flag &= ~NFLUSHWANT;