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 1.16 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>
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>
60 #include <sys/thread2.h>
63 #include "nwfs_node.h"
64 #include "nwfs_subr.h"
66 static int nwfs_fastlookup = 1;
68 SYSCTL_DECL(_vfs_nwfs);
69 SYSCTL_INT(_vfs_nwfs, OID_AUTO, fastlookup, CTLFLAG_RW, &nwfs_fastlookup, 0, "");
72 extern int nwfs_pbuf_freecnt;
74 #define DE_SIZE (sizeof(struct dirent))
78 nwfs_readvdir(struct vnode *vp, struct uio *uio, struct ucred *cred)
80 struct nwmount *nmp = VTONWFS(vp);
83 struct nwnode *np = VTONW(vp);
84 struct nw_entry_info fattr;
89 NCPVNDEBUG("dirname='%s'\n",np->n_name);
90 if (uio->uio_resid < DE_SIZE || (uio->uio_offset < 0))
94 i = uio->uio_offset / DE_SIZE; /* offset in directory */
96 error = ncp_initsearch(vp, uio->uio_td, cred);
98 NCPVNDEBUG("cannot initialize search, error=%d",error);
103 for (; uio->uio_resid >= DE_SIZE; i++) {
104 bzero((char *) &dp, DE_SIZE);
105 dp.d_reclen = DE_SIZE;
109 dp.d_fileno = (i == 0) ? np->n_fid.f_id : np->n_parent.f_id;
110 if (!dp.d_fileno) dp.d_fileno = NWFS_ROOT_INO;
114 dp.d_name[i + 1] = '\0';
118 error = ncp_search_for_file_or_subdir(nmp, &np->n_seq, &fattr, uio->uio_td, cred);
119 if (error && error < 0x80) break;
120 dp.d_fileno = fattr.dirEntNum;
121 dp.d_type = (fattr.attributes & aDIR) ? DT_DIR : DT_REG;
122 dp.d_namlen = fattr.nameLen;
123 bcopy(fattr.entryName, dp.d_name, dp.d_namlen);
124 dp.d_name[dp.d_namlen] = '\0';
126 if (error && eofflag) {
133 if (nwfs_fastlookup && !error && i > 1) {
134 fid.f_id = fattr.dirEntNum;
135 fid.f_parent = np->n_fid.f_id;
136 error = nwfs_nget(vp->v_mount, fid, &fattr, vp, &newvp);
138 VTONW(newvp)->n_ctime = VTONW(newvp)->n_vattr.va_ctime.tv_sec;
147 if ((error = uiomove((caddr_t)&dp, DE_SIZE, uio)))
151 uio->uio_offset = i * DE_SIZE;
156 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",__func__);
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(struct vnode *vp, struct uio *uiop, struct ucred *cred,
200 struct nwmount *nmp = VTONWFS(vp);
201 struct nwnode *np = VTONW(vp);
203 /* struct vattr vattr;*/
206 if (vp->v_type != VREG) {
207 printf("%s: vn types other than VREG unsupported !\n",__func__);
210 NCPVNDEBUG("ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
211 if (uiop->uio_offset < 0) return EINVAL;
212 /* if (uiop->uio_offset + uiop->uio_resid > nmp->nm_maxfilesize)
215 if (ioflag & (IO_APPEND | IO_SYNC)) {
216 if (np->n_flag & NMODIFIED) {
217 nwfs_attr_cacheremove(vp);
218 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
219 if (error) return (error);
221 if (ioflag & IO_APPEND) {
222 /* We can relay only on local information about file size,
223 * because until file is closed NetWare will not return
224 * the correct size. */
226 nwfs_attr_cacheremove(vp);
227 error = VOP_GETATTR(vp, &vattr, td);
228 if (error) return (error);
230 uiop->uio_offset = np->n_size;
233 if (uiop->uio_resid == 0) return 0;
234 if (td->td_proc && uiop->uio_offset + uiop->uio_resid >
235 td->td_proc->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
236 psignal(td->td_proc, SIGXFSZ);
239 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, uiop, cred);
240 NCPVNDEBUG("after: ofs=%d,resid=%d\n",(int)uiop->uio_offset, uiop->uio_resid);
242 if (uiop->uio_offset > np->n_size) {
243 np->n_vattr.va_size = np->n_size = uiop->uio_offset;
244 vnode_pager_setsize(vp, np->n_size);
251 * Do an I/O operation to/from a cache block.
254 nwfs_doio(struct buf *bp, struct ucred *cr, struct thread *td)
266 nmp = VFSTONWFS(vp->v_mount);
269 uiop->uio_iovcnt = 1;
270 uiop->uio_segflg = UIO_SYSSPACE;
272 if (bp->b_flags & B_READ) {
273 io.iov_len = uiop->uio_resid = bp->b_bcount;
274 io.iov_base = bp->b_data;
275 uiop->uio_rw = UIO_READ;
276 switch (vp->v_type) {
278 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE;
279 error = ncp_read(NWFSTOCONN(nmp), &np->n_fh, uiop, cr);
282 if (uiop->uio_resid) {
283 int left = uiop->uio_resid;
284 int nread = bp->b_bcount - left;
286 bzero((char *)bp->b_data + nread, left);
290 nfsstats.readdir_bios++;
291 uiop->uio_offset = ((u_quad_t)bp->b_lblkno) * NFS_DIRBLKSIZ;
292 if (nmp->nm_flag & NFSMNT_RDIRPLUS) {
293 error = nfs_readdirplusrpc(vp, uiop, cr);
294 if (error == NFSERR_NOTSUPP)
295 nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
297 if ((nmp->nm_flag & NFSMNT_RDIRPLUS) == 0)
298 error = nfs_readdirrpc(vp, uiop, cr);
299 if (error == 0 && uiop->uio_resid == bp->b_bcount)
300 bp->b_flags |= B_INVAL;
304 printf("nwfs_doio: type %x unexpected\n",vp->v_type);
308 bp->b_flags |= B_ERROR;
312 if (((bp->b_blkno * DEV_BSIZE) + bp->b_dirtyend) > np->n_size)
313 bp->b_dirtyend = np->n_size - (bp->b_blkno * DEV_BSIZE);
315 if (bp->b_dirtyend > bp->b_dirtyoff) {
316 io.iov_len = uiop->uio_resid = bp->b_dirtyend - bp->b_dirtyoff;
317 uiop->uio_offset = ((off_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
318 io.iov_base = (char *)bp->b_data + bp->b_dirtyoff;
319 uiop->uio_rw = UIO_WRITE;
320 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, uiop, cr);
323 * For an interrupted write, the buffer is still valid
324 * and the write hasn't been pushed to the server yet,
325 * so we can't set B_ERROR and report the interruption
326 * by setting B_EINTR. For the B_ASYNC case, B_EINTR
327 * is not relevant, so the rpc attempt is essentially
328 * a noop. For the case of a V3 write rpc not being
329 * committed to stable storage, the block is still
330 * dirty and requires either a commit rpc or another
331 * write rpc with iomode == NFSV3WRITE_FILESYNC before
332 * the block is reused. This is indicated by setting
333 * the B_DELWRI and B_NEEDCOMMIT flags.
336 || (!error && (bp->b_flags & B_NEEDCOMMIT))) {
339 bp->b_flags &= ~(B_INVAL|B_NOCACHE);
340 if ((bp->b_flags & B_ASYNC) == 0)
341 bp->b_flags |= B_EINTR;
342 if ((bp->b_flags & B_PAGING) == 0) {
344 bp->b_flags &= ~B_DONE;
346 if ((bp->b_flags & B_ASYNC) == 0)
347 bp->b_flags |= B_EINTR;
351 bp->b_flags |= B_ERROR;
352 bp->b_error /*= np->n_error */= error;
353 /* np->n_flag |= NWRITEERR;*/
355 bp->b_dirtyoff = bp->b_dirtyend = 0;
363 bp->b_resid = uiop->uio_resid;
369 * Vnode op for VM getpages.
370 * Wish wish .... get rid from multiple IO routines
372 * nwfs_getpages(struct vnode *a_vp, vm_page_t *a_m, int a_count,
373 * int a_reqpage, vm_ooffset_t a_offset)
376 nwfs_getpages(struct vop_getpages_args *ap)
379 return vnode_pager_generic_getpages(ap->a_vp, ap->a_m, ap->a_count,
382 int i, error, nextoff, size, toff, npages, count;
388 struct thread *td = curthread; /* XXX */
394 KKASSERT(td->td_proc);
395 cred = td->td_proc->p_ucred;
399 nmp = VFSTONWFS(vp->v_mount);
403 if (vp->v_object == NULL) {
404 printf("nwfs_getpages: called with non-merged cache vnode??\n");
405 return VM_PAGER_ERROR;
408 bp = getpbuf(&nwfs_pbuf_freecnt);
409 npages = btoc(count);
410 kva = (vm_offset_t) bp->b_data;
411 pmap_qenter(kva, pages, npages);
413 iov.iov_base = (caddr_t) kva;
417 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
418 uio.uio_resid = count;
419 uio.uio_segflg = UIO_SYSSPACE;
420 uio.uio_rw = UIO_READ;
423 error = ncp_read(NWFSTOCONN(nmp), &np->n_fh, &uio,cred);
424 pmap_qremove(kva, npages);
426 relpbuf(bp, &nwfs_pbuf_freecnt);
428 if (error && (uio.uio_resid == count)) {
429 printf("nwfs_getpages: error %d\n",error);
430 for (i = 0; i < npages; i++) {
431 if (ap->a_reqpage != i)
432 vnode_pager_freepage(pages[i]);
434 return VM_PAGER_ERROR;
437 size = count - uio.uio_resid;
439 for (i = 0, toff = 0; i < npages; i++, toff = nextoff) {
441 nextoff = toff + PAGE_SIZE;
444 m->flags &= ~PG_ZERO;
446 if (nextoff <= size) {
447 m->valid = VM_PAGE_BITS_ALL;
450 int nvalid = ((size + DEV_BSIZE - 1) - toff) & ~(DEV_BSIZE - 1);
451 vm_page_set_validclean(m, 0, nvalid);
454 if (i != ap->a_reqpage) {
456 * Whether or not to leave the page activated is up in
457 * the air, but we should put the page on a page queue
458 * somewhere (it already is in the object). Result:
459 * It appears that emperical results show that
460 * deactivating pages is best.
464 * Just in case someone was asking for this page we
465 * now tell them that it is ok to use.
468 if (m->flags & PG_WANTED)
471 vm_page_deactivate(m);
474 vnode_pager_freepage(m);
479 #endif /* NWFS_RWCACHE */
483 * Vnode op for VM putpages.
484 * possible bug: all IO done in sync mode
485 * Note that vop_close always invalidate pages before close, so it's
486 * not necessary to open vnode.
488 * nwfs_putpages(struct vnode *a_vp, vm_page_t *a_m, int a_count,
489 * int a_sync, int *a_rtvals, vm_ooffset_t a_offset)
492 nwfs_putpages(struct vop_putpages_args *ap)
495 struct thread *td = curthread; /* XXX */
496 struct vnode *vp = ap->a_vp;
500 KKASSERT(td->td_proc);
501 cred = td->td_proc->p_ucred; /* XXX */
502 VOP_OPEN(vp, FWRITE, cred, NULL, td);
503 error = vnode_pager_generic_putpages(ap->a_vp, ap->a_m, ap->a_count,
504 ap->a_sync, ap->a_rtvals);
505 VOP_CLOSE(vp, FWRITE, cred, td);
512 int i, npages, count;
518 KKASSERT(td->td_proc);
519 cred = td->td_proc->p_ucred; /* XXX */
521 /* VOP_OPEN(vp, FWRITE, cred, td);*/
523 nmp = VFSTONWFS(vp->v_mount);
526 rtvals = ap->a_rtvals;
527 npages = btoc(count);
529 for (i = 0; i < npages; i++) {
530 rtvals[i] = VM_PAGER_AGAIN;
533 bp = getpbuf(&nwfs_pbuf_freecnt);
534 kva = (vm_offset_t) bp->b_data;
535 pmap_qenter(kva, pages, npages);
537 iov.iov_base = (caddr_t) kva;
541 uio.uio_offset = IDX_TO_OFF(pages[0]->pindex);
542 uio.uio_resid = count;
543 uio.uio_segflg = UIO_SYSSPACE;
544 uio.uio_rw = UIO_WRITE;
546 NCPVNDEBUG("ofs=%d,resid=%d\n",(int)uio.uio_offset, uio.uio_resid);
548 error = ncp_write(NWFSTOCONN(nmp), &np->n_fh, &uio, cred);
549 /* VOP_CLOSE(vp, FWRITE, cred, td);*/
550 NCPVNDEBUG("paged write done: %d\n", error);
552 pmap_qremove(kva, npages);
553 relpbuf(bp, &nwfs_pbuf_freecnt);
556 int nwritten = round_page(count - uio.uio_resid) / PAGE_SIZE;
557 for (i = 0; i < nwritten; i++) {
558 rtvals[i] = VM_PAGER_OK;
563 #endif /* NWFS_RWCACHE */
566 * Flush and invalidate all dirty buffers. If another process is already
567 * doing the flush, just wait for completion.
570 nwfs_vinvalbuf(struct vnode *vp, int flags, struct thread *td, int intrflg)
572 struct nwnode *np = VTONW(vp);
573 /* struct nwmount *nmp = VTONWFS(vp);*/
574 int error = 0, slpflag, slptimeo;
576 if (vp->v_flag & VRECLAIMED) {
586 while (np->n_flag & NFLUSHINPROG) {
587 np->n_flag |= NFLUSHWANT;
588 error = tsleep((caddr_t)&np->n_flag, 0, "nwfsvinv", slptimeo);
589 error = ncp_chkintr(NWFSTOCONN(VTONWFS(vp)), td);
590 if (error == EINTR && intrflg)
593 np->n_flag |= NFLUSHINPROG;
594 error = vinvalbuf(vp, flags, td, slpflag, 0);
596 if (intrflg && (error == ERESTART || error == EINTR)) {
597 np->n_flag &= ~NFLUSHINPROG;
598 if (np->n_flag & NFLUSHWANT) {
599 np->n_flag &= ~NFLUSHWANT;
600 wakeup((caddr_t)&np->n_flag);
604 error = vinvalbuf(vp, flags, td, slpflag, 0);
606 np->n_flag &= ~(NMODIFIED | NFLUSHINPROG);
607 if (np->n_flag & NFLUSHWANT) {
608 np->n_flag &= ~NFLUSHWANT;
609 wakeup((caddr_t)&np->n_flag);