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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/kernel.h>
32 #include <sys/fcntl.h>
35 #include <sys/mount.h>
36 #include <sys/namei.h>
37 #include <sys/vnode.h>
38 #include <sys/dirent.h>
39 #include <sys/rwlock.h>
40 #include <sys/signalvar.h>
41 #include <sys/sysctl.h>
42 #include <sys/vmmeter.h>
45 #include <vm/vm_param.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_extern.h>
48 #include <vm/vm_object.h>
49 #include <vm/vm_pager.h>
50 #include <vm/vnode_pager.h>
52 #include <sys/ioccom.h>
54 #include <netsmb/smb.h>
55 #include <netsmb/smb_conn.h>
56 #include <netsmb/smb_subr.h>
58 #include <fs/smbfs/smbfs.h>
59 #include <fs/smbfs/smbfs_node.h>
60 #include <fs/smbfs/smbfs_subr.h>
62 /*#define SMBFS_RWGENERIC*/
64 extern int smbfs_pbuf_freecnt;
66 static int smbfs_fastlookup = 1;
68 SYSCTL_DECL(_vfs_smbfs);
69 SYSCTL_INT(_vfs_smbfs, OID_AUTO, fastlookup, CTLFLAG_RW, &smbfs_fastlookup, 0, "");
72 #define DE_SIZE (sizeof(struct dirent))
75 smbfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
78 struct componentname cn;
79 struct smb_cred *scred;
80 struct smbfs_fctx *ctx;
82 struct smbnode *np = VTOSMB(vp);
83 int error/*, *eofflag = ap->a_eofflag*/;
87 SMBVDEBUG("dirname='%s'\n", np->n_name);
88 scred = smbfs_malloc_scred();
89 smb_makescred(scred, uio->uio_td, cred);
90 offset = uio->uio_offset / DE_SIZE; /* offset in the directory */
91 limit = uio->uio_resid / DE_SIZE;
92 if (uio->uio_resid < DE_SIZE || uio->uio_offset < 0) {
96 while (limit && offset < 2) {
98 bzero((caddr_t)&de, DE_SIZE);
99 de.d_reclen = DE_SIZE;
100 de.d_fileno = (offset == 0) ? np->n_ino :
101 (np->n_parent ? np->n_parentino : 2);
102 if (de.d_fileno == 0)
103 de.d_fileno = 0x7ffffffd + offset;
104 de.d_namlen = offset + 1;
107 de.d_name[offset + 1] = '\0';
109 error = uiomove(&de, DE_SIZE, uio);
113 uio->uio_offset += DE_SIZE;
119 if (offset != np->n_dirofs || np->n_dirseq == NULL) {
120 SMBVDEBUG("Reopening search %ld:%ld\n", offset, np->n_dirofs);
122 smbfs_findclose(np->n_dirseq, scred);
126 error = smbfs_findopen(np, "*", 1,
127 SMB_FA_SYSTEM | SMB_FA_HIDDEN | SMB_FA_DIR,
130 SMBVDEBUG("can not open search, error = %d", error);
136 while (np->n_dirofs < offset) {
137 error = smbfs_findnext(ctx, offset - np->n_dirofs++, scred);
139 smbfs_findclose(np->n_dirseq, scred);
141 error = ENOENT ? 0 : error;
146 for (; limit; limit--, offset++) {
147 error = smbfs_findnext(ctx, limit, scred);
151 bzero((caddr_t)&de, DE_SIZE);
152 de.d_reclen = DE_SIZE;
153 de.d_fileno = ctx->f_attr.fa_ino;
154 de.d_type = (ctx->f_attr.fa_attr & SMB_FA_DIR) ? DT_DIR : DT_REG;
155 de.d_namlen = ctx->f_nmlen;
156 bcopy(ctx->f_name, de.d_name, de.d_namlen);
157 de.d_name[de.d_namlen] = '\0';
158 if (smbfs_fastlookup) {
159 error = smbfs_nget(vp->v_mount, vp, ctx->f_name,
160 ctx->f_nmlen, &ctx->f_attr, &newvp);
162 cn.cn_nameptr = de.d_name;
163 cn.cn_namelen = de.d_namlen;
164 cache_enter(vp, newvp, &cn);
168 error = uiomove(&de, DE_SIZE, uio);
174 uio->uio_offset = offset * DE_SIZE;
176 smbfs_free_scred(scred);
181 smbfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred)
183 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
184 struct smbnode *np = VTOSMB(vp);
187 struct smb_cred *scred;
191 * Protect against method which is not supported for now
193 if (uiop->uio_segflg == UIO_NOCOPY)
196 if (vp->v_type != VREG && vp->v_type != VDIR) {
197 SMBFSERR("vn types other than VREG or VDIR are unsupported !\n");
200 if (uiop->uio_resid == 0)
202 if (uiop->uio_offset < 0)
204 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
207 if (vp->v_type == VDIR) {
208 lks = LK_EXCLUSIVE; /* lockstatus(vp->v_vnlock); */
209 if (lks == LK_SHARED)
210 vn_lock(vp, LK_UPGRADE | LK_RETRY);
211 error = smbfs_readvdir(vp, uiop, cred);
212 if (lks == LK_SHARED)
213 vn_lock(vp, LK_DOWNGRADE | LK_RETRY);
217 /* biosize = SSTOCN(smp->sm_share)->sc_txmax;*/
218 if (np->n_flag & NMODIFIED) {
219 smbfs_attr_cacheremove(vp);
220 error = VOP_GETATTR(vp, &vattr, cred);
223 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
225 error = VOP_GETATTR(vp, &vattr, cred);
228 if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
229 error = smbfs_vinvalbuf(vp, td);
232 np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
235 scred = smbfs_malloc_scred();
236 smb_makescred(scred, td, cred);
237 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
238 smbfs_free_scred(scred);
243 smbfs_writevnode(struct vnode *vp, struct uio *uiop,
244 struct ucred *cred, int ioflag)
246 struct smbmount *smp = VTOSMBFS(vp);
247 struct smbnode *np = VTOSMB(vp);
248 struct smb_cred *scred;
252 if (vp->v_type != VREG) {
253 SMBERROR("vn types other than VREG unsupported !\n");
256 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
258 if (uiop->uio_offset < 0)
260 /* if (uiop->uio_offset + uiop->uio_resid > smp->nm_maxfilesize)
263 if (ioflag & (IO_APPEND | IO_SYNC)) {
264 if (np->n_flag & NMODIFIED) {
265 smbfs_attr_cacheremove(vp);
266 error = smbfs_vinvalbuf(vp, td);
270 if (ioflag & IO_APPEND) {
273 * File size can be changed by another client
275 smbfs_attr_cacheremove(vp);
276 error = VOP_GETATTR(vp, &vattr, cred);
277 if (error) return (error);
279 uiop->uio_offset = np->n_size;
282 if (uiop->uio_resid == 0)
285 if (vn_rlimit_fsize(vp, uiop, td))
288 scred = smbfs_malloc_scred();
289 smb_makescred(scred, td, cred);
290 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
291 smbfs_free_scred(scred);
292 SMBVDEBUG("after: ofs=%jd,resid=%zd\n", (intmax_t)uiop->uio_offset,
295 if (uiop->uio_offset > np->n_size) {
296 np->n_size = uiop->uio_offset;
297 vnode_pager_setsize(vp, np->n_size);
304 * Do an I/O operation to/from a cache block.
307 smbfs_doio(struct vnode *vp, struct buf *bp, struct ucred *cr, struct thread *td)
309 struct smbmount *smp = VFSTOSMBFS(vp->v_mount);
310 struct smbnode *np = VTOSMB(vp);
313 struct smb_cred *scred;
316 uiop = malloc(sizeof(struct uio), M_SMBFSDATA, M_WAITOK);
318 uiop->uio_iovcnt = 1;
319 uiop->uio_segflg = UIO_SYSSPACE;
322 scred = smbfs_malloc_scred();
323 smb_makescred(scred, td, cr);
325 if (bp->b_iocmd == BIO_READ) {
326 io.iov_len = uiop->uio_resid = bp->b_bcount;
327 io.iov_base = bp->b_data;
328 uiop->uio_rw = UIO_READ;
329 switch (vp->v_type) {
331 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
332 error = smb_read(smp->sm_share, np->n_fid, uiop, scred);
335 if (uiop->uio_resid) {
336 int left = uiop->uio_resid;
337 int nread = bp->b_bcount - left;
339 bzero((char *)bp->b_data + nread, left);
343 printf("smbfs_doio: type %x unexpected\n",vp->v_type);
348 bp->b_ioflags |= BIO_ERROR;
351 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
352 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
354 if (bp->b_dirtyend > bp->b_dirtyoff) {
355 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
356 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
357 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
358 uiop->uio_rw = UIO_WRITE;
359 error = smb_write(smp->sm_share, np->n_fid, uiop, scred);
362 * For an interrupted write, the buffer is still valid
363 * and the write hasn't been pushed to the server yet,
364 * so we can't set BIO_ERROR and report the interruption
365 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
366 * is not relevant, so the rpc attempt is essentially
367 * a noop. For the case of a V3 write rpc not being
368 * committed to stable storage, the block is still
369 * dirty and requires either a commit rpc or another
370 * write rpc with iomode == NFSV3WRITE_FILESYNC before
371 * the block is reused. This is indicated by setting
372 * the B_DELWRI and B_NEEDCOMMIT flags.
375 || (!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;
391 bp->b_ioflags |= BIO_ERROR;
394 bp->b_dirtyoff = bp->b_dirtyend = 0;
399 free(uiop, M_SMBFSDATA);
400 smbfs_free_scred(scred);
404 bp->b_resid = uiop->uio_resid;
406 free(uiop, M_SMBFSDATA);
407 smbfs_free_scred(scred);
412 * Vnode op for VM getpages.
413 * Wish wish .... get rid from multiple IO routines
417 struct vop_getpages_args /* {
424 #ifdef SMBFS_RWGENERIC
425 return vop_stdgetpages(ap);
427 int i, error, nextoff, size, toff, npages, count;
435 struct smbmount *smp;
437 struct smb_cred *scred;
442 if ((object = vp->v_object) == NULL) {
443 printf("smbfs_getpages: called with non-merged cache vnode??\n");
444 return VM_PAGER_ERROR;
447 td = curthread; /* XXX */
448 cred = td->td_ucred; /* XXX */
450 smp = VFSTOSMBFS(vp->v_mount);
452 npages = ap->a_count;
455 * If the requested page is partially valid, just return it and
456 * allow the pager to zero-out the blanks. Partially valid pages
457 * can only occur at the file EOF.
459 * XXXGL: is that true for SMB filesystem?
461 VM_OBJECT_WLOCK(object);
462 if (pages[npages - 1]->valid != 0 && --npages == 0)
464 VM_OBJECT_WUNLOCK(object);
466 scred = smbfs_malloc_scred();
467 smb_makescred(scred, td, cred);
469 bp = getpbuf(&smbfs_pbuf_freecnt);
471 kva = (vm_offset_t) bp->b_data;
472 pmap_qenter(kva, pages, npages);
473 PCPU_INC(cnt.v_vnodein);
474 PCPU_ADD(cnt.v_vnodepgsin, npages);
476 count = npages << PAGE_SHIFT;
477 iov.iov_base = (caddr_t) kva;
481 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
482 uio.uio_resid = count;
483 uio.uio_segflg = UIO_SYSSPACE;
484 uio.uio_rw = UIO_READ;
487 error = smb_read(smp->sm_share, np->n_fid, &uio, scred);
488 smbfs_free_scred(scred);
489 pmap_qremove(kva, npages);
491 relpbuf(bp, &smbfs_pbuf_freecnt);
493 if (error && (uio.uio_resid == count)) {
494 printf("smbfs_getpages: error %d\n",error);
495 return VM_PAGER_ERROR;
498 size = count - uio.uio_resid;
500 VM_OBJECT_WLOCK(object);
501 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
503 nextoff = toff + PAGE_SIZE;
506 if (nextoff <= size) {
508 * Read operation filled an entire page
510 m->valid = VM_PAGE_BITS_ALL;
511 KASSERT(m->dirty == 0,
512 ("smbfs_getpages: page %p is dirty", m));
513 } else if (size > toff) {
515 * Read operation filled a partial page.
518 vm_page_set_valid_range(m, 0, size - toff);
519 KASSERT(m->dirty == 0,
520 ("smbfs_getpages: page %p is dirty", m));
523 * Read operation was short. If no error occurred
524 * we may have hit a zero-fill section. We simply
525 * leave valid set to 0.
531 VM_OBJECT_WUNLOCK(object);
536 return (VM_PAGER_OK);
537 #endif /* SMBFS_RWGENERIC */
541 * Vnode op for VM putpages.
542 * possible bug: all IO done in sync mode
543 * Note that vop_close always invalidate pages before close, so it's
544 * not necessary to open vnode.
548 struct vop_putpages_args /* {
557 struct vnode *vp = ap->a_vp;
561 #ifdef SMBFS_RWGENERIC
562 td = curthread; /* XXX */
563 cred = td->td_ucred; /* XXX */
564 VOP_OPEN(vp, FWRITE, cred, td, NULL);
565 error = vop_stdputpages(ap);
566 VOP_CLOSE(vp, FWRITE, cred, td);
573 int i, npages, count;
575 struct smbmount *smp;
577 struct smb_cred *scred;
580 td = curthread; /* XXX */
581 cred = td->td_ucred; /* XXX */
582 /* VOP_OPEN(vp, FWRITE, cred, td, NULL);*/
584 smp = VFSTOSMBFS(vp->v_mount);
587 rtvals = ap->a_rtvals;
588 npages = btoc(count);
590 for (i = 0; i < npages; i++) {
591 rtvals[i] = VM_PAGER_ERROR;
594 bp = getpbuf(&smbfs_pbuf_freecnt);
596 kva = (vm_offset_t) bp->b_data;
597 pmap_qenter(kva, pages, npages);
598 PCPU_INC(cnt.v_vnodeout);
599 PCPU_ADD(cnt.v_vnodepgsout, count);
601 iov.iov_base = (caddr_t) kva;
605 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
606 uio.uio_resid = count;
607 uio.uio_segflg = UIO_SYSSPACE;
608 uio.uio_rw = UIO_WRITE;
610 SMBVDEBUG("ofs=%jd,resid=%zd\n", (intmax_t)uio.uio_offset,
613 scred = smbfs_malloc_scred();
614 smb_makescred(scred, td, cred);
615 error = smb_write(smp->sm_share, np->n_fid, &uio, scred);
616 smbfs_free_scred(scred);
617 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
618 SMBVDEBUG("paged write done: %d\n", error);
620 pmap_qremove(kva, npages);
622 relpbuf(bp, &smbfs_pbuf_freecnt);
625 vnode_pager_undirty_pages(pages, rtvals, count - uio.uio_resid,
626 npages * PAGE_SIZE, npages * PAGE_SIZE);
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, struct thread *td)
639 struct smbnode *np = VTOSMB(vp);
642 if (vp->v_iflag & VI_DOOMED)
645 while (np->n_flag & NFLUSHINPROG) {
646 np->n_flag |= NFLUSHWANT;
647 error = tsleep(&np->n_flag, PRIBIO + 2, "smfsvinv", 2 * hz);
648 error = smb_td_intr(td);
652 np->n_flag |= NFLUSHINPROG;
654 if (vp->v_bufobj.bo_object != NULL) {
655 VM_OBJECT_WLOCK(vp->v_bufobj.bo_object);
656 vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
657 VM_OBJECT_WUNLOCK(vp->v_bufobj.bo_object);
660 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
662 if (error == ERESTART || error == EINTR) {
663 np->n_flag &= ~NFLUSHINPROG;
664 if (np->n_flag & NFLUSHWANT) {
665 np->n_flag &= ~NFLUSHWANT;
670 error = vinvalbuf(vp, V_SAVE, PCATCH, 0);
672 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
673 if (np->n_flag & NFLUSHWANT) {
674 np->n_flag &= ~NFLUSHWANT;