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.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * $FreeBSD: src/sys/fs/smbfs/smbfs_io.c,v 1.3.2.3 2003/01/17 08:20:26 tjr Exp $
33 * $DragonFly: src/sys/vfs/smbfs/smbfs_io.c,v 1.17 2005/06/06 15:09:38 drhodus Exp $
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
39 #include <sys/kernel.h>
41 #include <sys/fcntl.h>
42 #include <sys/mount.h>
43 #include <sys/namei.h>
44 #include <sys/vnode.h>
45 #include <sys/dirent.h>
46 #include <sys/signalvar.h>
47 #include <sys/sysctl.h>
50 #include <vm/vm_page.h>
51 #include <vm/vm_extern.h>
52 #include <vm/vm_object.h>
53 #include <vm/vm_pager.h>
54 #include <vm/vnode_pager.h>
56 #include <sys/ioccom.h>
58 #include <netproto/smb/smb.h>
59 #include <netproto/smb/smb_conn.h>
60 #include <netproto/smb/smb_subr.h>
63 #include "smbfs_node.h"
64 #include "smbfs_subr.h"
68 #include <sys/thread2.h>
70 /*#define SMBFS_RWGENERIC*/
72 extern int smbfs_pbuf_freecnt;
74 static int smbfs_fastlookup = 1;
76 SYSCTL_DECL(_vfs_smbfs);
77 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
80 #define DE_SIZE (sizeof(struct dirent))
83 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
86 struct smb_cred scred;
87 struct smbfs_fctx *ctx;
89 struct smbnode *np = VTOSMB(vp);
90 int error/*, *eofflag = ap->a_eofflag*/;
94 SMBVDEBUG("dirname='%s'\n", np->n_name);
95 smb_makescred(&scred, uio->uio_td, cred);
96 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
97 limit = uio->uio_resid / DE_SIZE;
98 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0)
100 while (limit && offset < 2) {
102 bzero((caddr_t)&de, DE_SIZE);
103 de.d_reclen = DE_SIZE;
104 de.d_fileno = (offset == 0) ? np->n_ino :
105 (np->n_parent ? VTOSMB(np->n_parent)->n_ino : 2);
106 if (de.d_fileno == 0)
107 de.d_fileno = 0x7ffffffd + offset;
108 de.d_namlen = offset + 1;
111 de.d_name[offset + 1] = '\0';
113 error = uiomove((caddr_t)&de, DE_SIZE, uio);
117 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 return 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 de.d_name[de.d_namlen] = '\0';
159 if (smbfs_fastlookup) {
160 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
161 ctx->f_nmlen, &ctx->f_attr, &newvp);
165 error = uiomove((caddr_t)&de, DE_SIZE, uio);
171 uio->uio_offset = offset * DE_SIZE;
176 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
179 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
180 struct smbnode *np = VTOSMB(vp);
182 struct smb_cred scred;
186 * Protect against method which is not supported for now
188 if (uiop->uio_segflg == UIO_NOCOPY)
191 if (vp->v_type != VREG && vp->v_type != VDIR) {
192 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
195 if (uiop->uio_resid == 0)
197 if (uiop->uio_offset < 0)
199 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
202 if (vp->v_type == VDIR) {
203 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, td);*/
204 if (lks == LK_SHARED)
205 vn_lock(vp, LK_UPGRADE | LK_RETRY, td);
206 error = smbfs_readvdir(vp, uiop, cred);
207 if (lks == LK_SHARED)
208 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, td);
212 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
213 if (np->n_flag & NMODIFIED) {
214 smbfs_attr_cacheremove(vp);
215 error = VOP_GETATTR(vp, &vattr, td);
218 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
220 error = VOP_GETATTR(vp, &vattr, td);
223 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
224 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1);
227 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
230 smb_makescred(&scred, td, cred);
231 return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
235 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
236 struct ucred *cred, int ioflag)
239 struct smbmount *smp = VTOSMBFS(vp);
240 struct smbnode *np = VTOSMB(vp);
241 struct smb_cred scred;
244 if (vp->v_type != VREG) {
245 SMBERROR("vn types other than VREG unsupported !\n");
248 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
249 if (uiop->uio_offset < 0)
251 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
254 if (ioflag & (IO_APPEND | IO_SYNC)) {
255 if (np->n_flag & NMODIFIED) {
256 smbfs_attr_cacheremove(vp);
257 error = smbfs_vinvalbuf(vp, V_SAVE, td, 1);
261 if (ioflag & IO_APPEND) {
264 * File size can be changed by another client
266 smbfs_attr_cacheremove(vp);
267 error = VOP_GETATTR(vp, &vattr, td);
268 if (error) return (error);
270 uiop->uio_offset = np->n_size;
273 if (uiop->uio_resid == 0)
276 uiop->uio_offset + uiop->uio_resid >
277 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
278 psignal(td->td_proc, SIGXFSZ);
281 smb_makescred(&scred, td, cred);
282 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
283 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
285 if (uiop->uio_offset > np->n_size) {
286 np->n_size = uiop->uio_offset;
287 vnode_pager_setsize(vp, np->n_size);
294 * Do an I/O operation to/from a cache block.
297 smbfs_doio(struct buf *bp, struct ucred *cr, struct thread *td)
299 struct vnode *vp = bp->b_vp;
300 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
301 struct smbnode *np = VTOSMB(vp);
302 struct uio uio, *uiop = &uio;
304 struct smb_cred scred;
308 uiop->uio_iovcnt = 1;
309 uiop->uio_segflg = UIO_SYSSPACE;
312 smb_makescred(&scred, td, cr);
314 if (bp->b_flags & B_READ) {
315 io.iov_len = uiop->uio_resid = bp->b_bcount;
316 io.iov_base = bp->b_data;
317 uiop->uio_rw = UIO_READ;
318 switch (vp->v_type) {
320 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
321 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred);
324 if (uiop->uio_resid) {
325 int left = uiop->uio_resid;
326 int nread = bp->b_bcount - left;
328 bzero((char *)bp->b_data + nread, left);
332 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
337 bp->b_flags |= B_ERROR;
340 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
341 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
343 if (bp->b_dirtyend > bp->b_dirtyoff) {
344 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
345 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
346 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
347 uiop->uio_rw = UIO_WRITE;
348 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
351 * For an interrupted write, the buffer is still valid
352 * and the write hasn't been pushed to the server yet,
353 * so we can't set BIO_ERROR and report the interruption
354 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
355 * is not relevant, so the rpc attempt is essentially
356 * a noop. For the case of a V3 write rpc not being
357 * committed to stable storage, the block is still
358 * dirty and requires either a commit rpc or another
359 * write rpc with iomode == NFSV3WRITE_FILESYNC before
360 * the block is reused. This is indicated by setting
361 * the B_DELWRI and B_NEEDCOMMIT flags.
364 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
367 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
368 if ((bp->b_flags & B_ASYNC) == 0)
369 bp->b_flags |= B_EINTR;
370 if ((bp->b_flags & B_PAGING) == 0) {
372 bp->b_flags &= ~B_DONE;
374 if ((bp->b_flags & B_ASYNC) == 0)
375 bp->b_flags |= B_EINTR;
379 bp->b_flags |= B_ERROR;
382 bp->b_dirtyoff = bp->b_dirtyend = 0;
390 bp->b_resid = uiop->uio_resid;
396 * Vnode op for VM getpages.
397 * Wish wish .... get rid from multiple IO routines
399 * smbfs_getpages(struct vnode *a_vp, vm_page_t *a_m, int a_count,
400 * int a_reqpage, vm_ooffset_t a_offset)
403 smbfs_getpages(struct vop_getpages_args *ap)
405 #ifdef SMBFS_RWGENERIC
406 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
409 int i, error, nextoff, size, toff, npages, count;
416 struct thread *td = curthread; /* XXX */
418 struct smbmount *smp;
420 struct smb_cred scred;
423 KKASSERT(td->td_proc);
426 cred = td->td_proc->p_ucred;
428 smp = VFSTOSMBFS(vp->v_mount);
432 if (vp->v_object == NULL) {
433 printf("smbfs_getpages: called with non-merged cache vnode??\n");
434 return VM_PAGER_ERROR;
436 smb_makescred(&scred, td, cred);
438 bp = getpbuf(&smbfs_pbuf_freecnt);
439 npages = btoc(count);
440 kva = (vm_offset_t) bp->b_data;
441 pmap_qenter(kva, pages, npages);
443 iov.iov_base = (caddr_t) kva;
447 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
448 uio.uio_resid = count;
449 uio.uio_segflg = UIO_SYSSPACE;
450 uio.uio_rw = UIO_READ;
454 * This is kinda nasty. Since smbfs is physically closing the
455 * fid on close(), we have to reopen it if necessary. There are
456 * other races here too, such as if another process opens the same
457 * file while we are blocked in read. XXX
461 if (np->n_opencount == 0) {
462 error = smbfs_smb_open(np, SMB_AM_OPENREAD, &scred);
467 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
469 smbfs_smb_close(smp->sm_share, np->n_fid, NULL, &scred);
470 pmap_qremove(kva, npages);
472 relpbuf(bp, &smbfs_pbuf_freecnt);
474 if (error && (uio.uio_resid == count)) {
475 printf("smbfs_getpages: error %d\n",error);
476 for (i = 0; i < npages; i++) {
477 if (ap->a_reqpage != i)
478 vnode_pager_freepage(pages[i]);
480 return VM_PAGER_ERROR;
483 size = count - uio.uio_resid;
485 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
487 nextoff = toff + PAGE_SIZE;
490 m->flags &= ~PG_ZERO;
492 if (nextoff <= size) {
493 m->valid = VM_PAGE_BITS_ALL;
496 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
497 vm_page_set_validclean(m, 0, nvalid);
500 if (i != ap->a_reqpage) {
502 * Whether or not to leave the page activated is up in
503 * the air, but we should put the page on a page queue
504 * somewhere (it already is in the object). Result:
505 * It appears that emperical results show that
506 * deactivating pages is best.
510 * Just in case someone was asking for this page we
511 * now tell them that it is ok to use.
514 if (m->flags & PG_WANTED)
517 vm_page_deactivate(m);
520 vnode_pager_freepage(m);
525 #endif /* SMBFS_RWGENERIC */
529 * Vnode op for VM putpages.
530 * possible bug: all IO done in sync mode
531 * Note that vop_close always invalidate pages before close, so it's
532 * not necessary to open vnode.
534 * smbfs_putpages(struct vnode *a_vp, vm_page_t *a_m, int a_count, int a_sync,
535 * int *a_rtvals, vm_ooffset_t a_offset)
538 smbfs_putpages(struct vop_putpages_args *ap)
541 struct vnode *vp = ap->a_vp;
542 struct thread *td = curthread; /* XXX */
545 #ifdef SMBFS_RWGENERIC
546 KKASSERT(td->td_proc);
547 cred = td->td_proc->p_ucred;
548 VOP_OPEN(vp, FWRITE, cred, NULL, td);
549 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
550 ap->a_sync, ap->a_rtvals);
551 VOP_CLOSE(vp, FWRITE, cred, td);
558 int i, npages, count;
561 struct smbmount *smp;
563 struct smb_cred scred;
566 KKASSERT(td->td_proc);
567 cred = td->td_proc->p_ucred;
568 /* VOP_OPEN(vp, FWRITE, cred, td);*/
570 smp = VFSTOSMBFS(vp->v_mount);
573 rtvals = ap->a_rtvals;
574 npages = btoc(count);
576 for (i = 0; i < npages; i++) {
577 rtvals[i] = VM_PAGER_AGAIN;
580 bp = getpbuf(&smbfs_pbuf_freecnt);
581 kva = (vm_offset_t) bp->b_data;
582 pmap_qenter(kva, pages, npages);
584 iov.iov_base = (caddr_t) kva;
588 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
589 uio.uio_resid = count;
590 uio.uio_segflg = UIO_SYSSPACE;
591 uio.uio_rw = UIO_WRITE;
593 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
595 smb_makescred(&scred, td, cred);
598 * This is kinda nasty. Since smbfs is physically closing the
599 * fid on close(), we have to reopen it if necessary. There are
600 * other races here too, such as if another process opens the same
601 * file while we are blocked in read, or the file is open read-only
606 if (np->n_opencount == 0) {
607 error = smbfs_smb_open(np, SMB_AM_OPENRW, &scred);
612 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
614 smbfs_smb_close(smp->sm_share, np->n_fid, NULL, &scred);
615 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
616 SMBVDEBUG("paged write done: %d\n", error);
618 pmap_qremove(kva, npages);
619 relpbuf(bp, &smbfs_pbuf_freecnt);
622 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
623 for (i = 0; i < nwritten; i++) {
624 rtvals[i] = VM_PAGER_OK;
629 #endif /* SMBFS_RWGENERIC */
633 * Flush and invalidate all dirty buffers. If another process is already
634 * doing the flush, just wait for completion.
637 smbfs_vinvalbuf(struct vnode *vp, int flags, struct thread *td, int intrflg)
639 struct smbnode *np = VTOSMB(vp);
640 int error = 0, slpflag, slptimeo;
642 if (vp->v_flag & VRECLAIMED)
651 while (np->n_flag & NFLUSHINPROG) {
652 np->n_flag |= NFLUSHWANT;
653 error = tsleep((caddr_t)&np->n_flag, 0, "smfsvinv", slptimeo);
654 error = smb_proc_intr(td);
655 if (error == EINTR && intrflg)
658 np->n_flag |= NFLUSHINPROG;
659 error = vinvalbuf(vp, flags, td, slpflag, 0);
661 if (intrflg && (error == ERESTART || error == EINTR)) {
662 np->n_flag &= ~NFLUSHINPROG;
663 if (np->n_flag & NFLUSHWANT) {
664 np->n_flag &= ~NFLUSHWANT;
665 wakeup((caddr_t)&np->n_flag);
669 error = vinvalbuf(vp, flags, td, slpflag, 0);
671 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
672 if (np->n_flag & NFLUSHWANT) {
673 np->n_flag &= ~NFLUSHWANT;
674 wakeup((caddr_t)&np->n_flag);