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 $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/resourcevar.h> /* defines plimit structure in proc struct */
38 #include <sys/kernel.h>
40 #include <sys/fcntl.h>
41 #include <sys/mount.h>
42 #include <sys/namei.h>
43 #include <sys/vnode.h>
44 #include <sys/dirent.h>
45 #include <sys/signalvar.h>
46 #include <sys/sysctl.h>
49 #include <vm/vm_page.h>
50 #include <vm/vm_extern.h>
51 #include <vm/vm_object.h>
52 #include <vm/vm_pager.h>
53 #include <vm/vnode_pager.h>
55 #include <sys/ioccom.h>
57 #include <netsmb/smb.h>
58 #include <netsmb/smb_conn.h>
59 #include <netsmb/smb_subr.h>
61 #include <fs/smbfs/smbfs.h>
62 #include <fs/smbfs/smbfs_node.h>
63 #include <fs/smbfs/smbfs_subr.h>
67 /*#define SMBFS_RWGENERIC*/
69 extern int smbfs_pbuf_freecnt;
71 static int smbfs_fastlookup = 1;
73 extern struct linker_set sysctl_vfs_smbfs;
75 SYSCTL_DECL(_vfs_smbfs);
76 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
79 #define DE_SIZE (sizeof(struct dirent))
82 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
85 struct componentname cn;
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_procp, 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);
163 cn.cn_nameptr = de.d_name;
164 cn.cn_namelen = de.d_namlen;
165 cache_enter(vp, newvp, &cn);
169 error = uiomove((caddr_t)&de, DE_SIZE, uio);
175 uio->uio_offset = offset * DE_SIZE;
180 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
182 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
183 struct smbnode *np = VTOSMB(vp);
186 struct smb_cred scred;
190 * Protect against method which is not supported for now
192 if (uiop->uio_segflg == UIO_NOCOPY)
195 if (vp->v_type != VREG && vp->v_type != VDIR) {
196 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
199 if (uiop->uio_resid == 0)
201 if (uiop->uio_offset < 0)
203 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
206 if (vp->v_type == VDIR) {
207 lks = LK_EXCLUSIVE;/*lockstatus(&vp->v_lock, p);*/
208 if (lks == LK_SHARED)
209 vn_lock(vp, LK_UPGRADE | LK_RETRY, p);
210 error = smbfs_readvdir(vp, uiop, cred);
211 if (lks == LK_SHARED)
212 vn_lock(vp, LK_DOWNGRADE | LK_RETRY, p);
216 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
217 if (np->n_flag & NMODIFIED) {
218 smbfs_attr_cacheremove(vp);
219 error = VOP_GETATTR(vp, &vattr, cred, p);
222 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
224 error = VOP_GETATTR(vp, &vattr, cred, p);
227 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
228 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
231 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
234 smb_makescred(&scred, p, cred);
235 return smb_read(smp->sm_share, np->n_fid, uiop, &scred);
239 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
240 struct ucred *cred, int ioflag)
242 struct smbmount *smp = VTOSMBFS(vp);
243 struct smbnode *np = VTOSMB(vp);
244 struct smb_cred scred;
248 if (vp->v_type != VREG) {
249 SMBERROR("vn types other than VREG unsupported !\n");
252 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
253 if (uiop->uio_offset < 0)
255 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
258 if (ioflag & (IO_APPEND | IO_SYNC)) {
259 if (np->n_flag & NMODIFIED) {
260 smbfs_attr_cacheremove(vp);
261 error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
265 if (ioflag & IO_APPEND) {
268 * File size can be changed by another client
270 smbfs_attr_cacheremove(vp);
271 error = VOP_GETATTR(vp, &vattr, cred, p);
272 if (error) return (error);
274 uiop->uio_offset = np->n_size;
277 if (uiop->uio_resid == 0)
279 if (p && uiop->uio_offset + uiop->uio_resid > p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
283 smb_makescred(&scred, p, cred);
284 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
285 SMBVDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
287 if (uiop->uio_offset > np->n_size) {
288 np->n_size = uiop->uio_offset;
289 vnode_pager_setsize(vp, np->n_size);
296 * Do an I/O operation to/from a cache block.
299 smbfs_doio(struct buf *bp, struct ucred *cr, struct proc *p)
301 struct vnode *vp = bp->b_vp;
302 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
303 struct smbnode *np = VTOSMB(vp);
304 struct uio uio, *uiop = &uio;
306 struct smb_cred scred;
310 uiop->uio_iovcnt = 1;
311 uiop->uio_segflg = UIO_SYSSPACE;
314 smb_makescred(&scred, p, cr);
316 if (bp->b_flags & B_READ) {
317 io.iov_len = uiop->uio_resid = bp->b_bcount;
318 io.iov_base = bp->b_data;
319 uiop->uio_rw = UIO_READ;
320 switch (vp->v_type) {
322 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
323 error = smb_read(smp->sm_share, np->n_fid, uiop, &scred);
326 if (uiop->uio_resid) {
327 int left = uiop->uio_resid;
328 int nread = bp->b_bcount - left;
330 bzero((char *)bp->b_data + nread, left);
334 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
339 bp->b_flags |= B_ERROR;
342 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
343 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
345 if (bp->b_dirtyend > bp->b_dirtyoff) {
346 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
347 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
348 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
349 uiop->uio_rw = UIO_WRITE;
350 bp->b_flags |= B_WRITEINPROG;
351 error = smb_write(smp->sm_share, np->n_fid, uiop, &scred);
352 bp->b_flags &= ~B_WRITEINPROG;
355 * For an interrupted write, the buffer is still valid
356 * and the write hasn't been pushed to the server yet,
357 * so we can't set BIO_ERROR and report the interruption
358 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
359 * is not relevant, so the rpc attempt is essentially
360 * a noop. For the case of a V3 write rpc not being
361 * committed to stable storage, the block is still
362 * dirty and requires either a commit rpc or another
363 * write rpc with iomode == NFSV3WRITE_FILESYNC before
364 * the block is reused. This is indicated by setting
365 * the B_DELWRI and B_NEEDCOMMIT flags.
368 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
372 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
373 if ((bp->b_flags & B_ASYNC) == 0)
374 bp->b_flags |= B_EINTR;
375 if ((bp->b_flags & B_PAGING) == 0) {
377 bp->b_flags &= ~B_DONE;
379 if ((bp->b_flags & B_ASYNC) == 0)
380 bp->b_flags |= B_EINTR;
384 bp->b_flags |= B_ERROR;
387 bp->b_dirtyoff = bp->b_dirtyend = 0;
395 bp->b_resid = uiop->uio_resid;
401 * Vnode op for VM getpages.
402 * Wish wish .... get rid from multiple IO routines
406 struct vop_getpages_args /* {
411 vm_ooffset_t a_offset;
414 #ifdef SMBFS_RWGENERIC
415 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
418 int i, error, nextoff, size, toff, npages, count;
426 struct smbmount *smp;
428 struct smb_cred scred;
432 p = curproc; /* XXX */
433 cred = curproc->p_ucred; /* XXX */
435 smp = VFSTOSMBFS(vp->v_mount);
439 if (vp->v_object == NULL) {
440 printf("smbfs_getpages: called with non-merged cache vnode??\n");
441 return VM_PAGER_ERROR;
443 smb_makescred(&scred, p, cred);
445 bp = getpbuf(&smbfs_pbuf_freecnt);
446 npages = btoc(count);
447 kva = (vm_offset_t) bp->b_data;
448 pmap_qenter(kva, pages, npages);
450 iov.iov_base = (caddr_t) kva;
454 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
455 uio.uio_resid = count;
456 uio.uio_segflg = UIO_SYSSPACE;
457 uio.uio_rw = UIO_READ;
460 error = smb_read(smp->sm_share, np->n_fid, &uio, &scred);
461 pmap_qremove(kva, npages);
463 relpbuf(bp, &smbfs_pbuf_freecnt);
465 if (error && (uio.uio_resid == count)) {
466 printf("smbfs_getpages: error %d\n",error);
467 for (i = 0; i < npages; i++) {
468 if (ap->a_reqpage != i)
469 vnode_pager_freepage(pages[i]);
471 return VM_PAGER_ERROR;
474 size = count - uio.uio_resid;
476 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
478 nextoff = toff + PAGE_SIZE;
481 m->flags &= ~PG_ZERO;
483 if (nextoff <= size) {
484 m->valid = VM_PAGE_BITS_ALL;
487 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
488 vm_page_set_validclean(m, 0, nvalid);
491 if (i != ap->a_reqpage) {
493 * Whether or not to leave the page activated is up in
494 * the air, but we should put the page on a page queue
495 * somewhere (it already is in the object). Result:
496 * It appears that emperical results show that
497 * deactivating pages is best.
501 * Just in case someone was asking for this page we
502 * now tell them that it is ok to use.
505 if (m->flags & PG_WANTED)
508 vm_page_deactivate(m);
511 vnode_pager_freepage(m);
516 #endif /* SMBFS_RWGENERIC */
520 * Vnode op for VM putpages.
521 * possible bug: all IO done in sync mode
522 * Note that vop_close always invalidate pages before close, so it's
523 * not necessary to open vnode.
527 struct vop_putpages_args /* {
533 vm_ooffset_t a_offset;
537 struct vnode *vp = ap->a_vp;
541 #ifdef SMBFS_RWGENERIC
542 p = curproc; /* XXX */
543 cred = p->p_ucred; /* XXX */
544 VOP_OPEN(vp, FWRITE, cred, p);
545 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
546 ap->a_sync, ap->a_rtvals);
547 VOP_CLOSE(vp, FWRITE, cred, p);
554 int i, npages, count;
556 struct smbmount *smp;
558 struct smb_cred scred;
561 p = curproc; /* XXX */
562 cred = p->p_ucred; /* XXX */
563 /* VOP_OPEN(vp, FWRITE, cred, p);*/
565 smp = VFSTOSMBFS(vp->v_mount);
568 rtvals = ap->a_rtvals;
569 npages = btoc(count);
571 for (i = 0; i < npages; i++) {
572 rtvals[i] = VM_PAGER_AGAIN;
575 bp = getpbuf(&smbfs_pbuf_freecnt);
576 kva = (vm_offset_t) bp->b_data;
577 pmap_qenter(kva, pages, npages);
579 iov.iov_base = (caddr_t) kva;
583 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
584 uio.uio_resid = count;
585 uio.uio_segflg = UIO_SYSSPACE;
586 uio.uio_rw = UIO_WRITE;
588 SMBVDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
590 smb_makescred(&scred, p, cred);
591 error = smb_write(smp->sm_share, np->n_fid, &uio, &scred);
592 /* VOP_CLOSE(vp, FWRITE, cred, p);*/
593 SMBVDEBUG("paged write done: %d\n", error);
595 pmap_qremove(kva, npages);
596 relpbuf(bp, &smbfs_pbuf_freecnt);
599 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
600 for (i = 0; i < nwritten; i++) {
601 rtvals[i] = VM_PAGER_OK;
606 #endif /* SMBFS_RWGENERIC */
610 * Flush and invalidate all dirty buffers. If another process is already
611 * doing the flush, just wait for completion.
614 smbfs_vinvalbuf(vp, flags, cred, p, intrflg)
621 struct smbnode *np = VTOSMB(vp);
622 int error = 0, slpflag, slptimeo;
624 if (vp->v_flag & VXLOCK)
633 while (np->n_flag & NFLUSHINPROG) {
634 np->n_flag |= NFLUSHWANT;
635 error = tsleep((caddr_t)&np->n_flag, PRIBIO + 2, "smfsvinv", slptimeo);
636 error = smb_proc_intr(p);
637 if (error == EINTR && intrflg)
640 np->n_flag |= NFLUSHINPROG;
641 error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
643 if (intrflg && (error == ERESTART || error == EINTR)) {
644 np->n_flag &= ~NFLUSHINPROG;
645 if (np->n_flag & NFLUSHWANT) {
646 np->n_flag &= ~NFLUSHWANT;
647 wakeup((caddr_t)&np->n_flag);
651 error = vinvalbuf(vp, flags, cred, p, slpflag, 0);
653 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
654 if (np->n_flag & NFLUSHWANT) {
655 np->n_flag &= ~NFLUSHWANT;
656 wakeup((caddr_t)&np->n_flag);