2 * Copyright (c) 1999, 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/nwfs/nwfs_io.c,v 1.6.2.1 2000/10/25 02:11:10 bp Exp $
33 * $DragonFly: src/sys/vfs/nwfs/nwfs_io.c,v 1.9 2003/11/10 06:12:17 dillon 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>
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 <netproto/ncp/ncp.h>
57 #include <netproto/ncp/ncp_conn.h>
58 #include <netproto/ncp/ncp_subr.h>
61 #include "nwfs_node.h"
62 #include "nwfs_subr.h"
64 static int nwfs_fastlookup = 1;
66 SYSCTL_DECL(_vfs_nwfs);
67 SYSCTL_INT(_vfs_nwfs, OID_AUTO, fastlookup, CTLFLAG_RW, &nwfs_fastlookup, 0, "");
70 extern int nwfs_pbuf_freecnt;
72 #define DE_SIZE (sizeof(struct dirent))
76 nwfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred) {
77 struct nwmount *nmp = VTONWFS(vp);
80 struct nwnode *np = VTONW(vp);
81 struct nw_entry_info fattr;
83 struct componentname cn;
87 NCPVNDEBUG("dirname='%s'\n",np->n_name);
88 if (uio->uio_resid < DE_SIZE || (uio->uio_offset < 0))
92 i = uio->uio_offset / DE_SIZE; /* offset in directory */
94 error = ncp_initsearch(vp, uio->uio_td, cred);
96 NCPVNDEBUG("cannot initialize search, error=%d",error);
101 for (; uio->uio_resid >= DE_SIZE; i++) {
102 bzero((char *) &dp, DE_SIZE);
103 dp.d_reclen = DE_SIZE;
107 dp.d_fileno = (i == 0) ? np->n_fid.f_id : np->n_parent.f_id;
108 if (!dp.d_fileno) dp.d_fileno = NWFS_ROOT_INO;
112 dp.d_name[i + 1] = '\0';
116 error = ncp_search_for_file_or_subdir(nmp, &np->n_seq, &fattr, uio->uio_td, cred);
117 if (error && error < 0x80) break;
118 dp.d_fileno = fattr.dirEntNum;
119 dp.d_type = (fattr.attributes & aDIR) ? DT_DIR : DT_REG;
120 dp.d_namlen = fattr.nameLen;
121 bcopy(fattr.entryName, dp.d_name, dp.d_namlen);
122 dp.d_name[dp.d_namlen] = '\0';
124 if (error && eofflag) {
131 if (nwfs_fastlookup && !error && i > 1) {
132 fid.f_id = fattr.dirEntNum;
133 fid.f_parent = np->n_fid.f_id;
134 error = nwfs_nget(vp->v_mount, fid, &fattr, vp, &newvp);
136 VTONW(newvp)->n_ctime = VTONW(newvp)->n_vattr.va_ctime.tv_sec;
137 cn.cn_nameptr = dp.d_name;
138 cn.cn_namelen = dp.d_namlen;
139 cache_enter(vp, NCPNULL, newvp, &cn);
148 if ((error = uiomove((caddr_t)&dp, DE_SIZE, uio)))
152 uio->uio_offset = i * DE_SIZE;
157 nwfs_readvnode(struct vnode *vp, struct uio *uiop, struct ucred *cred) {
158 struct nwmount *nmp = VFSTONWFS(vp->v_mount);
159 struct nwnode *np = VTONW(vp);
164 if (vp->v_type != VREG && vp->v_type != VDIR) {
165 printf("%s: vn types other than VREG or VDIR are unsupported !\n",__FUNCTION__);
168 if (uiop->uio_resid == 0) return 0;
169 if (uiop->uio_offset < 0) return EINVAL;
170 /* if (uiop->uio_offset + uiop->uio_resid > nmp->nm_maxfilesize)
173 if (vp->v_type == VDIR) {
174 error = nwfs_readvdir(vp, uiop, cred);
177 biosize = NWFSTOCONN(nmp)->buffer_size;
178 if (np->n_flag & NMODIFIED) {
179 nwfs_attr_cacheremove(vp);
180 error = VOP_GETATTR(vp, &vattr, td);
181 if (error) return (error);
182 np->n_mtime = vattr.va_mtime.tv_sec;
184 error = VOP_GETATTR(vp, &vattr, td);
185 if (error) return (error);
186 if (np->n_mtime != vattr.va_mtime.tv_sec) {
187 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
188 if (error) return (error);
189 np->n_mtime = vattr.va_mtime.tv_sec;
192 error = ncp_read(NWFSTOCONN(nmp), &np->n_fh, uiop,cred);
197 nwfs_writevnode(vp, uiop, cred, ioflag)
203 struct nwmount *nmp = VTONWFS(vp);
204 struct nwnode *np = VTONW(vp);
206 /* struct vattr vattr;*/
209 if (vp->v_type != VREG) {
210 printf("%s: vn types other than VREG unsupported !\n",__FUNCTION__);
213 NCPVNDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
214 if (uiop->uio_offset < 0) return EINVAL;
215 /* if (uiop->uio_offset + uiop->uio_resid > nmp->nm_maxfilesize)
218 if (ioflag & (IO_APPEND | IO_SYNC)) {
219 if (np->n_flag & NMODIFIED) {
220 nwfs_attr_cacheremove(vp);
221 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
222 if (error) return (error);
224 if (ioflag & IO_APPEND) {
225 /* We can relay only on local information about file size,
226 * because until file is closed NetWare will not return
227 * the correct size. */
229 nwfs_attr_cacheremove(vp);
230 error = VOP_GETATTR(vp, &vattr, td);
231 if (error) return (error);
233 uiop->uio_offset = np->n_size;
236 if (uiop->uio_resid == 0) return 0;
237 if (td->td_proc && uiop->uio_offset + uiop->uio_resid >
238 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
239 psignal(td->td_proc, SIGXFSZ);
242 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, uiop, cred);
243 NCPVNDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
245 if (uiop->uio_offset > np->n_size) {
246 np->n_vattr.va_size = np->n_size = uiop->uio_offset;
247 vnode_pager_setsize(vp, np->n_size);
254 * Do an I/O operation to/from a cache block.
257 nwfs_doio(struct buf *bp, struct ucred *cr, struct thread *td)
269 nmp = VFSTONWFS(vp->v_mount);
272 uiop->uio_iovcnt = 1;
273 uiop->uio_segflg = UIO_SYSSPACE;
275 if (bp->b_flags & B_READ) {
276 io.iov_len = uiop->uio_resid = bp->b_bcount;
277 io.iov_base = bp->b_data;
278 uiop->uio_rw = UIO_READ;
279 switch (vp->v_type) {
281 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
282 error = ncp_read(NWFSTOCONN(nmp), &np->n_fh, uiop, cr);
285 if (uiop->uio_resid) {
286 int left = uiop->uio_resid;
287 int nread = bp->b_bcount - left;
289 bzero((char *)bp->b_data + nread, left);
293 nfsstats.readdir_bios++;
294 uiop->uio_offset = ((u_quad_t)bp->b_lblkno) * NFS_DIRBLKSIZ;
295 if (nmp->nm_flag & NFSMNT_RDIRPLUS) {
296 error = nfs_readdirplusrpc(vp, uiop, cr);
297 if (error == NFSERR_NOTSUPP)
298 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
300 if ((nmp->nm_flag & NFSMNT_RDIRPLUS) == 0)
301 error = nfs_readdirrpc(vp, uiop, cr);
302 if (error == 0 && uiop->uio_resid == bp->b_bcount)
303 bp->b_flags |= B_INVAL;
307 printf("nwfs_doio: type %x unexpected\n",vp->v_type);
311 bp->b_flags |= B_ERROR;
315 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
316 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
318 if (bp->b_dirtyend > bp->b_dirtyoff) {
319 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
320 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
321 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
322 uiop->uio_rw = UIO_WRITE;
323 bp->b_flags |= B_WRITEINPROG;
324 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, uiop, cr);
325 bp->b_flags &= ~B_WRITEINPROG;
328 * For an interrupted write, the buffer is still valid
329 * and the write hasn't been pushed to the server yet,
330 * so we can't set B_ERROR and report the interruption
331 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
332 * is not relevant, so the rpc attempt is essentially
333 * a noop. For the case of a V3 write rpc not being
334 * committed to stable storage, the block is still
335 * dirty and requires either a commit rpc or another
336 * write rpc with iomode == NFSV3WRITE_FILESYNC before
337 * the block is reused. This is indicated by setting
338 * the B_DELWRI and B_NEEDCOMMIT flags.
341 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
345 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
346 if ((bp->b_flags & B_ASYNC) == 0)
347 bp->b_flags |= B_EINTR;
348 if ((bp->b_flags & B_PAGING) == 0) {
350 bp->b_flags &= ~B_DONE;
352 if ((bp->b_flags & B_ASYNC) == 0)
353 bp->b_flags |= B_EINTR;
357 bp->b_flags |= B_ERROR;
358 bp->b_error /*= np->n_error */= error;
359 /* np->n_flag |= NWRITEERR;*/
361 bp->b_dirtyoff = bp->b_dirtyend = 0;
369 bp->b_resid = uiop->uio_resid;
375 * Vnode op for VM getpages.
376 * Wish wish .... get rid from multiple IO routines
380 struct vop_getpages_args /* {
385 vm_ooffset_t a_offset;
389 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
392 int i, error, nextoff, size, toff, npages, count;
398 struct thread *td = curthread; /* XXX */
404 KKASSERT(td->td_proc);
405 cred = td->td_proc->p_ucred;
409 nmp = VFSTONWFS(vp->v_mount);
413 if (vp->v_object == NULL) {
414 printf("nwfs_getpages: called with non-merged cache vnode??\n");
415 return VM_PAGER_ERROR;
418 bp = getpbuf(&nwfs_pbuf_freecnt);
419 npages = btoc(count);
420 kva = (vm_offset_t) bp->b_data;
421 pmap_qenter(kva, pages, npages);
423 iov.iov_base = (caddr_t) kva;
427 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
428 uio.uio_resid = count;
429 uio.uio_segflg = UIO_SYSSPACE;
430 uio.uio_rw = UIO_READ;
433 error = ncp_read(NWFSTOCONN(nmp), &np->n_fh, &uio,cred);
434 pmap_qremove(kva, npages);
436 relpbuf(bp, &nwfs_pbuf_freecnt);
438 if (error && (uio.uio_resid == count)) {
439 printf("nwfs_getpages: error %d\n",error);
440 for (i = 0; i < npages; i++) {
441 if (ap->a_reqpage != i)
442 vnode_pager_freepage(pages[i]);
444 return VM_PAGER_ERROR;
447 size = count - uio.uio_resid;
449 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
451 nextoff = toff + PAGE_SIZE;
454 m->flags &= ~PG_ZERO;
456 if (nextoff <= size) {
457 m->valid = VM_PAGE_BITS_ALL;
460 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
461 vm_page_set_validclean(m, 0, nvalid);
464 if (i != ap->a_reqpage) {
466 * Whether or not to leave the page activated is up in
467 * the air, but we should put the page on a page queue
468 * somewhere (it already is in the object). Result:
469 * It appears that emperical results show that
470 * deactivating pages is best.
474 * Just in case someone was asking for this page we
475 * now tell them that it is ok to use.
478 if (m->flags & PG_WANTED)
481 vm_page_deactivate(m);
484 vnode_pager_freepage(m);
489 #endif /* NWFS_RWCACHE */
493 * Vnode op for VM putpages.
494 * possible bug: all IO done in sync mode
495 * Note that vop_close always invalidate pages before close, so it's
496 * not necessary to open vnode.
500 struct vop_putpages_args /* {
506 vm_ooffset_t a_offset;
510 struct thread *td = curthread; /* XXX */
511 struct vnode *vp = ap->a_vp;
515 KKASSERT(td->td_proc);
516 cred = td->td_proc->p_ucred; /* XXX */
517 VOP_OPEN(vp, FWRITE, cred, td);
518 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
519 ap->a_sync, ap->a_rtvals);
520 VOP_CLOSE(vp, FWRITE, cred, td);
527 int i, npages, count;
533 KKASSERT(td->td_proc);
534 cred = td->td_proc->p_ucred; /* XXX */
536 /* VOP_OPEN(vp, FWRITE, cred, td);*/
538 nmp = VFSTONWFS(vp->v_mount);
541 rtvals = ap->a_rtvals;
542 npages = btoc(count);
544 for (i = 0; i < npages; i++) {
545 rtvals[i] = VM_PAGER_AGAIN;
548 bp = getpbuf(&nwfs_pbuf_freecnt);
549 kva = (vm_offset_t) bp->b_data;
550 pmap_qenter(kva, pages, npages);
552 iov.iov_base = (caddr_t) kva;
556 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
557 uio.uio_resid = count;
558 uio.uio_segflg = UIO_SYSSPACE;
559 uio.uio_rw = UIO_WRITE;
561 NCPVNDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
563 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, &uio, cred);
564 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
565 NCPVNDEBUG("paged write done: %d\n", error);
567 pmap_qremove(kva, npages);
568 relpbuf(bp, &nwfs_pbuf_freecnt);
571 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
572 for (i = 0; i < nwritten; i++) {
573 rtvals[i] = VM_PAGER_OK;
578 #endif /* NWFS_RWCACHE */
581 * Flush and invalidate all dirty buffers. If another process is already
582 * doing the flush, just wait for completion.
585 nwfs_vinvalbuf(vp, flags, td, intrflg)
591 struct nwnode *np = VTONW(vp);
592 /* struct nwmount *nmp = VTONWFS(vp);*/
593 int error = 0, slpflag, slptimeo;
595 if (vp->v_flag & VXLOCK) {
605 while (np->n_flag & NFLUSHINPROG) {
606 np->n_flag |= NFLUSHWANT;
607 error = tsleep((caddr_t)&np->n_flag, 0, "nwfsvinv", slptimeo);
608 error = ncp_chkintr(NWFSTOCONN(VTONWFS(vp)), td);
609 if (error == EINTR && intrflg)
612 np->n_flag |= NFLUSHINPROG;
613 error = vinvalbuf(vp, flags, td, slpflag, 0);
615 if (intrflg && (error == ERESTART || error == EINTR)) {
616 np->n_flag &= ~NFLUSHINPROG;
617 if (np->n_flag & NFLUSHWANT) {
618 np->n_flag &= ~NFLUSHWANT;
619 wakeup((caddr_t)&np->n_flag);
623 error = vinvalbuf(vp, flags, td, slpflag, 0);
625 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
626 if (np->n_flag & NFLUSHWANT) {
627 np->n_flag &= ~NFLUSHWANT;
628 wakeup((caddr_t)&np->n_flag);