![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to nfs_vnops.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / bsd / nfs|
Return to nfs_vnops.c CVS log | Up to [Apple XNU] / XNU / bsd / nfs |
1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
23: /*
24: * Copyright (c) 1989, 1993
25: * The Regents of the University of California. All rights reserved.
26: *
27: * This code is derived from software contributed to Berkeley by
28: * Rick Macklem at The University of Guelph.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95
59: * FreeBSD-Id: nfs_vnops.c,v 1.72 1997/11/07 09:20:48 phk Exp $
60: */
61:
62:
63: /*
64: * vnode op calls for Sun NFS version 2 and 3
65: */
66:
67: #include <mach_nbc.h>
68: #include <sys/param.h>
69: #include <sys/kernel.h>
70: #include <sys/systm.h>
71: #include <sys/resourcevar.h>
72: #include <sys/proc.h>
73: #include <sys/mount.h>
74: #include <sys/buf.h>
75: #include <sys/malloc.h>
76: #include <sys/mbuf.h>
77: #include <sys/conf.h>
78: #include <sys/namei.h>
79: #include <sys/vnode.h>
80: #include <sys/dirent.h>
81: #include <sys/fcntl.h>
82: #include <sys/lockf.h>
83: #include <ufs/ufs/dir.h>
84: #include <vfs/vfs_support.h>
85:
86: #include <sys/vm.h>
87: #include <machine/spl.h>
88:
89: #include <miscfs/fifofs/fifo.h>
90: #include <miscfs/specfs/specdev.h>
91:
92: #include <nfs/rpcv2.h>
93: #include <nfs/nfsproto.h>
94: #include <nfs/nfs.h>
95: #include <nfs/nfsnode.h>
96: #include <nfs/nfsmount.h>
97: #include <nfs/xdr_subs.h>
98: #include <nfs/nfsm_subs.h>
99: #include <nfs/nqnfs.h>
100:
101: #include <net/if.h>
102: #include <netinet/in.h>
103: #include <netinet/in_var.h>
104: #include <kern/mapfs.h>
105: #include <kern/task.h>
106: #include <vm/vm_kern.h>
107:
108: #define TRUE 1
109: #define FALSE 0
110:
111: /* XXX CSM 11/25/97 Revisit when Ramesh merges vm with buffer cache
112: * Ifdef for FreeBSD-current merged buffer cache. It is unfortunate that these
113: * calls are not in getblk() and brelse() so that they would not be necessary
114: * here.
115: */
116: #ifndef B_VMIO
117: #define vfs_busy_pages(bp, f)
118: #define vfs_unbusy_pages(bp)
119: #endif
120:
121: static int nfsspec_read __P((struct vop_read_args *));
122: static int nfsspec_write __P((struct vop_write_args *));
123: static int nfsfifo_read __P((struct vop_read_args *));
124: static int nfsfifo_write __P((struct vop_write_args *));
125: static int nfsspec_close __P((struct vop_close_args *));
126: static int nfsfifo_close __P((struct vop_close_args *));
127: #define nfs_poll vop_nopoll
128: static int nfs_ioctl __P((struct vop_ioctl_args *));
129: static int nfs_select __P((struct vop_select_args *));
130: static int nfs_flush __P((struct vnode *,struct ucred *,int,struct proc *,int));
131: static int nfs_setattrrpc __P((struct vnode *,struct vattr *,struct ucred *,struct proc *));
132: static int nfs_lookup __P((struct vop_lookup_args *));
133: static int nfs_create __P((struct vop_create_args *));
134: static int nfs_mknod __P((struct vop_mknod_args *));
135: static int nfs_open __P((struct vop_open_args *));
136: static int nfs_close __P((struct vop_close_args *));
137: static int nfs_access __P((struct vop_access_args *));
138: static int nfs_getattr __P((struct vop_getattr_args *));
139: static int nfs_setattr __P((struct vop_setattr_args *));
140: static int nfs_read __P((struct vop_read_args *));
141: static int nfs_mmap __P((struct vop_mmap_args *));
142: static int nfs_fsync __P((struct vop_fsync_args *));
143: static int nfs_remove __P((struct vop_remove_args *));
144: static int nfs_link __P((struct vop_link_args *));
145: static int nfs_rename __P((struct vop_rename_args *));
146: static int nfs_mkdir __P((struct vop_mkdir_args *));
147: static int nfs_rmdir __P((struct vop_rmdir_args *));
148: static int nfs_symlink __P((struct vop_symlink_args *));
149: static int nfs_readdir __P((struct vop_readdir_args *));
150: static int nfs_bmap __P((struct vop_bmap_args *));
151: static int nfs_strategy __P((struct vop_strategy_args *));
152: static int nfs_lookitup __P((struct vnode *,char *,int,struct ucred *,struct proc *,struct nfsnode **));
153: static int nfs_sillyrename __P((struct vnode *,struct vnode *,struct componentname *));
154: static int nfsspec_access __P((struct vop_access_args *));
155: static int nfs_readlink __P((struct vop_readlink_args *));
156: static int nfs_print __P((struct vop_print_args *));
157: static int nfs_pathconf __P((struct vop_pathconf_args *));
158: static int nfs_advlock __P((struct vop_advlock_args *));
159: static int nfs_blkatoff __P((struct vop_blkatoff_args *));
160: static int nfs_bwrite __P((struct vop_bwrite_args *));
161: static int nfs_valloc __P((struct vop_valloc_args *));
162: static int nfs_vfree __P((struct vop_vfree_args *));
163: static int nfs_truncate __P((struct vop_truncate_args *));
164: static int nfs_update __P((struct vop_update_args *));
165: static int nfs_pagein __P((struct vop_pagein_args *));
166: static int nfs_pageout __P((struct vop_pageout_args *));
167: /*
168: * Global vfs data structures for nfs
169: */
170: vop_t **nfsv2_vnodeop_p;
171: static struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
172: { &vop_default_desc, (vop_t *)vn_default_error },
173: { &vop_lookup_desc, (vop_t *)nfs_lookup }, /* lookup */
174: { &vop_create_desc, (vop_t *)nfs_create }, /* create */
175: { &vop_mknod_desc, (vop_t *)nfs_mknod }, /* mknod */
176: { &vop_open_desc, (vop_t *)nfs_open }, /* open */
177: { &vop_close_desc, (vop_t *)nfs_close }, /* close */
178: { &vop_access_desc, (vop_t *)nfs_access }, /* access */
179: { &vop_getattr_desc, (vop_t *)nfs_getattr }, /* getattr */
180: { &vop_setattr_desc, (vop_t *)nfs_setattr }, /* setattr */
181: { &vop_read_desc, (vop_t *)nfs_read }, /* read */
182: { &vop_write_desc, (vop_t *)nfs_write }, /* write */
183: { &vop_lease_desc, (vop_t *)nfs_lease_check }, /* lease */
184: { &vop_ioctl_desc, (vop_t *)nfs_ioctl }, /* ioctl */
185: { &vop_select_desc, (vop_t *)nfs_select }, /* select */
186: { &vop_revoke_desc, (vop_t *)nfs_revoke }, /* revoke */
187: { &vop_mmap_desc, (vop_t *)nfs_mmap }, /* mmap */
188: { &vop_fsync_desc, (vop_t *)nfs_fsync }, /* fsync */
189: { &vop_seek_desc, (vop_t *)nfs_seek }, /* seek */
190: { &vop_remove_desc, (vop_t *)nfs_remove }, /* remove */
191: { &vop_link_desc, (vop_t *)nfs_link }, /* link */
192: { &vop_rename_desc, (vop_t *)nfs_rename }, /* rename */
193: { &vop_mkdir_desc, (vop_t *)nfs_mkdir }, /* mkdir */
194: { &vop_rmdir_desc, (vop_t *)nfs_rmdir }, /* rmdir */
195: { &vop_symlink_desc, (vop_t *)nfs_symlink }, /* symlink */
196: { &vop_readdir_desc, (vop_t *)nfs_readdir }, /* readdir */
197: { &vop_readlink_desc, (vop_t *)nfs_readlink }, /* readlink */
198: { &vop_abortop_desc, (vop_t *)nfs_abortop }, /* abortop */
199: { &vop_inactive_desc, (vop_t *)nfs_inactive }, /* inactive */
200: { &vop_reclaim_desc, (vop_t *)nfs_reclaim }, /* reclaim */
201: { &vop_lock_desc, (vop_t *)nfs_lock }, /* lock */
202: { &vop_unlock_desc, (vop_t *)nfs_unlock }, /* unlock */
203: { &vop_bmap_desc, (vop_t *)nfs_bmap }, /* bmap */
204: { &vop_strategy_desc, (vop_t *)nfs_strategy }, /* strategy */
205: { &vop_print_desc, (vop_t *)nfs_print }, /* print */
206: { &vop_islocked_desc, (vop_t *)nfs_islocked }, /* islocked */
207: { &vop_pathconf_desc, (vop_t *)nfs_pathconf }, /* pathconf */
208: { &vop_advlock_desc, (vop_t *)nfs_advlock }, /* advlock */
209: { &vop_blkatoff_desc, (vop_t *)nfs_blkatoff }, /* blkatoff */
210: { &vop_valloc_desc, (vop_t *)nfs_valloc }, /* valloc */
211: { &vop_reallocblks_desc, (vop_t *)nfs_reallocblks }, /* reallocblks */
212: { &vop_vfree_desc, (vop_t *)nfs_vfree }, /* vfree */
213: { &vop_truncate_desc, (vop_t *)nfs_truncate }, /* truncate */
214: { &vop_update_desc, (vop_t *)nfs_update }, /* update */
215: { &vop_bwrite_desc, (vop_t *)nfs_bwrite }, /* bwrite */
216: { &vop_pagein_desc, nfs_pagein }, /* Pagein */
217: { &vop_pageout_desc, nfs_pageout }, /* Pageout */
218: { &vop_copyfile_desc, err_copyfile }, /* Copyfile */
219: { NULL, NULL }
220: };
221: struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
222: { &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
223: #ifdef __FreeBSD__
224: VNODEOP_SET(nfsv2_vnodeop_opv_desc);
225: #endif
226:
227: /*
228: * Special device vnode ops
229: */
230: vop_t **spec_nfsv2nodeop_p;
231: static struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = {
232: { &vop_default_desc, (vop_t *)vn_default_error },
233: { &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */
234: { &vop_create_desc, (vop_t *)spec_create }, /* create */
235: { &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */
236: { &vop_open_desc, (vop_t *)spec_open }, /* open */
237: { &vop_close_desc, (vop_t *)nfsspec_close }, /* close */
238: { &vop_access_desc, (vop_t *)nfsspec_access }, /* access */
239: { &vop_getattr_desc, (vop_t *)nfs_getattr }, /* getattr */
240: { &vop_setattr_desc, (vop_t *)nfs_setattr }, /* setattr */
241: { &vop_read_desc, (vop_t *)nfsspec_read }, /* read */
242: { &vop_write_desc, (vop_t *)nfsspec_write }, /* write */
243: { &vop_lease_desc, (vop_t *)spec_lease_check }, /* lease */
244: { &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */
245: { &vop_select_desc, (vop_t *)spec_select }, /* select */
246: { &vop_revoke_desc, (vop_t *)spec_revoke }, /* revoke */
247: { &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */
248: { &vop_fsync_desc, (vop_t *)nfs_fsync }, /* fsync */
249: { &vop_seek_desc, (vop_t *)spec_seek }, /* seek */
250: { &vop_remove_desc, (vop_t *)spec_remove }, /* remove */
251: { &vop_link_desc, (vop_t *)spec_link }, /* link */
252: { &vop_rename_desc, (vop_t *)spec_rename }, /* rename */
253: { &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */
254: { &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */
255: { &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */
256: { &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */
257: { &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */
258: { &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */
259: { &vop_inactive_desc, (vop_t *)nfs_inactive }, /* inactive */
260: { &vop_reclaim_desc, (vop_t *)nfs_reclaim }, /* reclaim */
261: { &vop_lock_desc, (vop_t *)nfs_lock }, /* lock */
262: { &vop_unlock_desc, (vop_t *)nfs_unlock }, /* unlock */
263: { &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */
264: { &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */
265: { &vop_print_desc, (vop_t *)nfs_print }, /* print */
266: { &vop_islocked_desc, (vop_t *)nfs_islocked }, /* islocked */
267: { &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */
268: { &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */
269: { &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */
270: { &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */
271: { &vop_reallocblks_desc, (vop_t *)spec_reallocblks }, /* reallocblks */
272: { &vop_vfree_desc, (vop_t *)spec_vfree }, /* vfree */
273: { &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */
274: { &vop_update_desc, (vop_t *)nfs_update }, /* update */
275: { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */
276: #ifdef NeXT
277: { &vop_devblocksize_desc, spec_devblocksize }, /* devblocksize */
278: #endif /* NeXT */
279: { &vop_pagein_desc, nfs_pagein }, /* Pagein */
280: { &vop_pageout_desc, nfs_pageout }, /* Pageout */
281: { NULL, NULL }
282: };
283: struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
284: { &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries };
285: #ifdef __FreeBSD__
286: VNODEOP_SET(spec_nfsv2nodeop_opv_desc);
287: #endif
288:
289: vop_t **fifo_nfsv2nodeop_p;
290: static struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = {
291: { &vop_default_desc, (vop_t *)vn_default_error },
292: { &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */
293: { &vop_create_desc, (vop_t *)fifo_create }, /* create */
294: { &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */
295: { &vop_open_desc, (vop_t *)fifo_open }, /* open */
296: { &vop_close_desc, (vop_t *)nfsfifo_close }, /* close */
297: { &vop_access_desc, (vop_t *)nfsspec_access }, /* access */
298: { &vop_getattr_desc, (vop_t *)nfs_getattr }, /* getattr */
299: { &vop_setattr_desc, (vop_t *)nfs_setattr }, /* setattr */
300: { &vop_read_desc, (vop_t *)nfsfifo_read }, /* read */
301: { &vop_write_desc, (vop_t *)nfsfifo_write }, /* write */
302: { &vop_lease_desc, (vop_t *)fifo_lease_check }, /* lease */
303: { &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */
304: { &vop_select_desc, (vop_t *)fifo_select }, /* select */
305: { &vop_revoke_desc, (vop_t *)fifo_revoke }, /* revoke */
306: { &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */
307: { &vop_fsync_desc, (vop_t *)nfs_fsync }, /* fsync */
308: { &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */
309: { &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */
310: { &vop_link_desc, (vop_t *)fifo_link }, /* link */
311: { &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */
312: { &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */
313: { &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */
314: { &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */
315: { &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */
316: { &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */
317: { &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */
318: { &vop_inactive_desc, (vop_t *)nfs_inactive }, /* inactive */
319: { &vop_reclaim_desc, (vop_t *)nfs_reclaim }, /* reclaim */
320: { &vop_lock_desc, (vop_t *)nfs_lock }, /* lock */
321: { &vop_unlock_desc, (vop_t *)nfs_unlock }, /* unlock */
322: { &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */
323: { &vop_strategy_desc, (vop_t *)fifo_badop }, /* strategy */
324: { &vop_print_desc, (vop_t *)nfs_print }, /* print */
325: { &vop_islocked_desc, (vop_t *)nfs_islocked }, /* islocked */
326: { &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */
327: { &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */
328: { &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */
329: { &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */
330: { &vop_reallocblks_desc, (vop_t *)fifo_reallocblks }, /* reallocblks */
331: { &vop_vfree_desc, (vop_t *)fifo_vfree }, /* vfree */
332: { &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */
333: { &vop_update_desc, (vop_t *)nfs_update }, /* update */
334: { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */
335: { &vop_pagein_desc, nfs_pagein }, /* Pagein */
336: { &vop_pageout_desc, nfs_pageout }, /* Pageout */
337: { NULL, NULL }
338: };
339: struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
340: { &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries };
341: #ifdef __FreeBSD__
342: VNODEOP_SET(fifo_nfsv2nodeop_opv_desc);
343: #endif
344:
345: static int nfs_commit __P((struct vnode *vp, u_quad_t offset, int cnt,
346: struct ucred *cred, struct proc *procp));
347: static int nfs_mknodrpc __P((struct vnode *dvp, struct vnode **vpp,
348: struct componentname *cnp,
349: struct vattr *vap));
350: static int nfs_removerpc __P((struct vnode *dvp, char *name, int namelen,
351: struct ucred *cred, struct proc *proc));
352: static int nfs_renamerpc __P((struct vnode *fdvp, char *fnameptr,
353: int fnamelen, struct vnode *tdvp,
354: char *tnameptr, int tnamelen,
355: struct ucred *cred, struct proc *proc));
356: static int nfs_renameit __P((struct vnode *sdvp,
357: struct componentname *scnp,
358: struct sillyrename *sp));
359:
360: /*
361: * Global variables
362: */
363: extern u_long nfs_true, nfs_false;
364: extern struct nfsstats nfsstats;
365: extern nfstype nfsv3_type[9];
366: struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
367: struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
368: int nfs_numasync = 0;
369: #define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
370:
371: /*
372: * nfs access vnode op.
373: * For nfs version 2, just return ok. File accesses may fail later.
374: * For nfs version 3, use the access rpc to check accessibility. If file modes
375: * are changed on the server, accesses might still fail later.
376: */
377: static int
378: nfs_access(ap)
379: struct vop_access_args /* {
380: struct vnode *a_vp;
381: int a_mode;
382: struct ucred *a_cred;
383: struct proc *a_p;
384: } */ *ap;
385: {
386: register struct vnode *vp = ap->a_vp;
387: register u_long *tl;
388: register caddr_t cp;
389: register int t1, t2;
390: caddr_t bpos, dpos, cp2;
391: int error = 0, attrflag;
392: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
393: u_long mode, rmode;
394: int v3 = NFS_ISV3(vp);
395:
396: /*
397: * For nfs v3, do an access rpc, otherwise you are stuck emulating
398: * ufs_access() locally using the vattr. This may not be correct,
399: * since the server may apply other access criteria such as
400: * client uid-->server uid mapping that we do not know about, but
401: * this is better than just returning anything that is lying about
402: * in the cache.
403: */
404: if (v3) {
405: nfsstats.rpccnt[NFSPROC_ACCESS]++;
406: nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
407: nfsm_fhtom(vp, v3);
408: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
409: if (ap->a_mode & VREAD)
410: mode = NFSV3ACCESS_READ;
411: else
412: mode = 0;
413: if (vp->v_type == VDIR) {
414: if (ap->a_mode & VWRITE)
415: mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
416: NFSV3ACCESS_DELETE);
417: if (ap->a_mode & VEXEC)
418: mode |= NFSV3ACCESS_LOOKUP;
419: } else {
420: if (ap->a_mode & VWRITE)
421: mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
422: if (ap->a_mode & VEXEC)
423: mode |= NFSV3ACCESS_EXECUTE;
424: }
425: *tl = txdr_unsigned(mode);
426: nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred);
427: nfsm_postop_attr(vp, attrflag);
428: if (!error) {
429: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
430: rmode = fxdr_unsigned(u_long, *tl);
431: /*
432: * The NFS V3 spec does not clarify whether or not
433: * the returned access bits can be a superset of
434: * the ones requested, so...
435: */
436: if ((rmode & mode) != mode)
437: error = EACCES;
438: }
439: nfsm_reqdone;
440: return (error);
441: } else
442: return (nfsspec_access(ap));
443: /* CSM - moved EROFS check down per NetBSD rev 1.71. So you
444: * get the correct error value with layered filesystems. */
445: /*
446: * Disallow write attempts on filesystems mounted read-only;
447: * unless the file is a socket, fifo, or a block or character
448: * device resident on the filesystem.
449: */
450: if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
451: switch (vp->v_type) {
452: case VREG: case VDIR: case VLNK:
453: return (EROFS);
454: }
455: }
456: }
457:
458: /*
459: * nfs open vnode op
460: * Check to see if the type is ok
461: * and that deletion is not in progress.
462: * For paged in text files, you will need to flush the page cache
463: * if consistency is lost.
464: */
465: /* ARGSUSED */
466: static int
467: nfs_open(ap)
468: struct vop_open_args /* {
469: struct vnode *a_vp;
470: int a_mode;
471: struct ucred *a_cred;
472: struct proc *a_p;
473: } */ *ap;
474: {
475: register struct vnode *vp = ap->a_vp;
476: struct nfsnode *np = VTONFS(vp);
477: struct nfsmount *nmp = VFSTONFS(vp->v_mount);
478: struct vattr vattr;
479: int error;
480:
481: if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
482: { printf("open eacces vtyp=%d\n",vp->v_type);
483: return (EACCES);
484: }
485: /*
486: * Get a valid lease. If cached data is stale, flush it.
487: */
488: if (nmp->nm_flag & NFSMNT_NQNFS) {
489: if (NQNFS_CKINVALID(vp, np, ND_READ)) {
490: do {
491: error = nqnfs_getlease(vp, ND_READ, ap->a_cred,
492: ap->a_p);
493: } while (error == NQNFS_EXPIRED);
494: if (error)
495: return (error);
496: if (np->n_lrev != np->n_brev ||
497: (np->n_flag & NQNFSNONCACHE)) {
498: if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
499: ap->a_p, 1)) == EINTR)
500: return (error);
501: (void) vnode_uncache(vp);
502: np->n_brev = np->n_lrev;
503: }
504: }
505: } else {
506: if (np->n_flag & NMODIFIED) {
507: if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
508: ap->a_p, 1)) == EINTR)
509: return (error);
510: (void) vnode_uncache(vp);
511: np->n_attrstamp = 0;
512: if (vp->v_type == VDIR)
513: np->n_direofoffset = 0;
514: error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
515: if (error)
516: return (error);
517: np->n_mtime = vattr.va_mtime.tv_sec;
518: } else {
519: error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
520: if (error)
521: return (error);
522: if (np->n_mtime != vattr.va_mtime.tv_sec) {
523: if (vp->v_type == VDIR)
524: np->n_direofoffset = 0;
525: if ((error = nfs_vinvalbuf(vp, V_SAVE,
526: ap->a_cred, ap->a_p, 1)) == EINTR)
527: return (error);
528: (void) vnode_uncache(vp);
529: np->n_mtime = vattr.va_mtime.tv_sec;
530: }
531: }
532: }
533: if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
534: np->n_attrstamp = 0; /* For Open/Close consistency */
535: return (0);
536: }
537:
538: /*
539: * nfs close vnode op
540: * What an NFS client should do upon close after writing is a debatable issue.
541: * Most NFS clients push delayed writes to the server upon close, basically for
542: * two reasons:
543: * 1 - So that any write errors may be reported back to the client process
544: * doing the close system call. By far the two most likely errors are
545: * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
546: * 2 - To put a worst case upper bound on cache inconsistency between
547: * multiple clients for the file.
548: * There is also a consistency problem for Version 2 of the protocol w.r.t.
549: * not being able to tell if other clients are writing a file concurrently,
550: * since there is no way of knowing if the changed modify time in the reply
551: * is only due to the write for this client.
552: * (NFS Version 3 provides weak cache consistency data in the reply that
553: * should be sufficient to detect and handle this case.)
554: *
555: * The current code does the following:
556: * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
557: * for NFS Version 3 - flush dirty buffers to the server but don't invalidate
558: * or commit them (this satisfies 1 and 2 except for the
559: * case where the server crashes after this close but
560: * before the commit RPC, which is felt to be "good
561: * enough". Changing the last argument to nfs_flush() to
562: * a 1 would force a commit operation, if it is felt a
563: * commit is necessary now.
564: * for NQNFS - do nothing now, since 2 is dealt with via leases and
565: * 1 should be dealt with via an fsync() system call for
566: * cases where write errors are important.
567: */
568: /* ARGSUSED */
569: static int
570: nfs_close(ap)
571: struct vop_close_args /* {
572: struct vnodeop_desc *a_desc;
573: struct vnode *a_vp;
574: int a_fflag;
575: struct ucred *a_cred;
576: struct proc *a_p;
577: } */ *ap;
578: {
579: register struct vnode *vp = ap->a_vp;
580: register struct nfsnode *np = VTONFS(vp);
581: int error = 0;
582:
583: if (vp->v_type == VREG) {
584: #if DIAGNOSTIC
585: register struct sillyrename *sp = np->n_sillyrename;
586: if (sp)
587: #endif
588: NFS_DPF(SILLY,
589: ("nfs_close: %s, dvp=%x, vp=%x, ap=%x, np=%x, sp=%x\n",
590: &sp->s_name[0], (unsigned)(sp->s_dvp), (unsigned)vp,
591: (unsigned)ap, (unsigned)np, (unsigned)sp));
592: if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
593: (np->n_flag & NMODIFIED)) {
594: if (NFS_ISV3(vp)) {
595: error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0);
596: np->n_flag &= ~NMODIFIED;
597: } else
598: error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
599: np->n_attrstamp = 0;
600: }
601: if (np->n_flag & NWRITEERR) {
602: np->n_flag &= ~NWRITEERR;
603: error = np->n_error;
604: }
605: }
606: return (error);
607: }
608:
609: /*
610: * nfs getattr call from vfs.
611: */
612: static int
613: nfs_getattr(ap)
614: struct vop_getattr_args /* {
615: struct vnode *a_vp;
616: struct vattr *a_vap;
617: struct ucred *a_cred;
618: struct proc *a_p;
619: } */ *ap;
620: {
621: register struct vnode *vp = ap->a_vp;
622: register struct nfsnode *np = VTONFS(vp);
623: register caddr_t cp;
624: register u_long *tl;
625: register int t1, t2;
626: caddr_t bpos, dpos;
627: int error = 0;
628: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
629: int v3 = NFS_ISV3(vp);
630:
631: /*
632: * Update local times for special files.
633: */
634: if (np->n_flag & (NACC | NUPD))
635: np->n_flag |= NCHG;
636: /*
637: * First look in the cache.
638: */
639: if (nfs_getattrcache(vp, ap->a_vap) == 0)
640: return (0);
641: nfsstats.rpccnt[NFSPROC_GETATTR]++;
642: nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
643: nfsm_fhtom(vp, v3);
644: nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
645: if (!error) {
646: nfsm_loadattr(vp, ap->a_vap);
647: if (np->n_mtime != ap->a_vap->va_mtime.tv_sec) {
648: NFSTRACE(NFSTRC_GA_INV, vp);
649: if (vp->v_type == VDIR)
650: nfs_invaldir(vp);
651: error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
652: ap->a_p, 1);
653: if (!error) {
654: NFSTRACE(NFSTRC_GA_INV1, vp);
655: np->n_mtime = ap->a_vap->va_mtime.tv_sec;
656: } else {
657: NFSTRACE(NFSTRC_GA_INV2, error);
658: }
659: }
660: }
661: nfsm_reqdone;
662: return (error);
663: }
664:
665: /*
666: * nfs setattr call.
667: */
668: static int
669: nfs_setattr(ap)
670: struct vop_setattr_args /* {
671: struct vnodeop_desc *a_desc;
672: struct vnode *a_vp;
673: struct vattr *a_vap;
674: struct ucred *a_cred;
675: struct proc *a_p;
676: } */ *ap;
677: {
678: register struct vnode *vp = ap->a_vp;
679: register struct nfsnode *np = VTONFS(vp);
680: register struct vattr *vap = ap->a_vap;
681: int error = 0;
682: u_quad_t tsize;
683:
684: #ifndef nolint
685: tsize = (u_quad_t)0;
686: #endif
687: /*
688: * Disallow write attempts if the filesystem is mounted read-only.
689: */
690: if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL ||
691: vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
692: vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
693: (vp->v_mount->mnt_flag & MNT_RDONLY))
694: return (EROFS);
695: if (vap->va_size != VNOVAL) {
696: switch (vp->v_type) {
697: case VDIR:
698: return (EISDIR);
699: case VCHR:
700: case VBLK:
701: case VSOCK:
702: case VFIFO:
703: if (vap->va_mtime.tv_sec == VNOVAL &&
704: vap->va_atime.tv_sec == VNOVAL &&
705: vap->va_mode == (u_short)VNOVAL &&
706: vap->va_uid == (uid_t)VNOVAL &&
707: vap->va_gid == (gid_t)VNOVAL)
708: return (0);
709: vap->va_size = VNOVAL;
710: break;
711: default:
712: /*
713: * Disallow write attempts if the filesystem is
714: * mounted read-only.
715: */
716: if (vp->v_mount->mnt_flag & MNT_RDONLY)
717: return (EROFS);
718: np->n_flag |= NMODIFIED;
719: /*
720: * save n_size first as mapfs_trunc can trigger
721: * size change via nfs_bio
722: */
723: tsize = np->n_size;
724: #if MACH_NBC
725: if ((vp->v_type == VREG) && (vp->v_vm_info)
726: && vp->v_vm_info->mapped) {
727: error = mapfs_trunc(vp,vap->va_size);
728: if (error) {
729: #if DIAGNOSTIC
730: kprintf("nfs_setattr: mapfs_trunc %d\n",
731: error);
732: #endif /* DIAGNOSTIC */
733: return (error);
734: }
735: } else {
736: #endif /* MACH_NBC */
737: /* needs to be present till Unified buffer cache implementaiton */
738: ubc_truncate(vp, (u_long)vap->va_size);
739:
740: vnode_pager_setsize(vp, (u_long)vap->va_size);
741: #if MACH_NBC
742: }
743: #endif /* MACH_NBC */
744: if (vap->va_size == 0)
745: error = nfs_vinvalbuf(vp, 0,
746: ap->a_cred, ap->a_p, 1);
747: else
748: error = nfs_vinvalbuf(vp, V_SAVE,
749: ap->a_cred, ap->a_p, 1);
750: if (error) {
751: #if DIAGNOSTIC
752: kprintf("nfs_setattr: nfs_vinvalbuf %d\n",
753: error);
754: #endif /* DIAGNOSTIC */
755: return (error);
756: }
757: np->n_size = np->n_vattr.va_size = vap->va_size;
758:
759: };
760: } else if ((vap->va_mtime.tv_sec != VNOVAL ||
761: vap->va_atime.tv_sec != VNOVAL) && (np->n_flag & NMODIFIED) &&
762: vp->v_type == VREG &&
763: (error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
764: ap->a_p, 1)) == EINTR)
765: return (error);
766: error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
767: if (error && vap->va_size != VNOVAL) {
768: /* make every effort to resync file size w/ server... */
769: int err = 0; /* preserve "error" for return */
770:
771: #if DIAGNOSTIC
772: kprintf("nfs_setattr: nfs_setattrrpc %d\n", error);
773: #endif /* DIAGNOSTIC */
774: np->n_size = np->n_vattr.va_size = tsize;
775: #if MACH_NBC
776: if (vp->v_type == VREG && vp->v_vm_info &&
777: vp->v_vm_info->mapped) {
778: err = mapfs_trunc(vp, tsize);
779: #if DIAGNOSTIC
780: if (err)
781: kprintf("nfs_setattr mapfs_trunc %d\n", err);
782: #endif /* DIAGNOSTIC */
783: } else {
784: #endif /* MACH_NBC */
785: /* needs to be present till Unified buffer cache implementaiton */
786: ubc_truncate(vp, (u_long)np->n_size);
787: vnode_pager_setsize(vp, (u_long)np->n_size);
788: #if MACH_NBC
789: }
790: #endif /* MACH_NBC */
791: vap->va_size = tsize;
792: err = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
793: #if DIAGNOSTIC
794: if (err)
795: kprintf("nfs_setattr nfs_setattrrpc %d\n", err);
796: #endif /* DIAGNOSTIC */
797: }
798: return (error);
799: }
800:
801: /*
802: * Do an nfs setattr rpc.
803: */
804: static int
805: nfs_setattrrpc(vp, vap, cred, procp)
806: register struct vnode *vp;
807: register struct vattr *vap;
808: struct ucred *cred;
809: struct proc *procp;
810: {
811: register struct nfsv2_sattr *sp;
812: register caddr_t cp;
813: register long t1, t2;
814: caddr_t bpos, dpos, cp2;
815: u_long *tl;
816: int error = 0, wccflag = NFSV3_WCCRATTR;
817: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
818: int v3 = NFS_ISV3(vp);
819:
820: nfsstats.rpccnt[NFSPROC_SETATTR]++;
821: nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
822: nfsm_fhtom(vp, v3);
823: if (v3) {
824: if (vap->va_mode != (u_short)VNOVAL) {
825: nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
826: *tl++ = nfs_true;
827: *tl = txdr_unsigned(vap->va_mode);
828: } else {
829: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
830: *tl = nfs_false;
831: }
832: if (vap->va_uid != (uid_t)VNOVAL) {
833: nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
834: *tl++ = nfs_true;
835: *tl = txdr_unsigned(vap->va_uid);
836: } else {
837: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
838: *tl = nfs_false;
839: }
840: if (vap->va_gid != (gid_t)VNOVAL) {
841: nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
842: *tl++ = nfs_true;
843: *tl = txdr_unsigned(vap->va_gid);
844: } else {
845: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
846: *tl = nfs_false;
847: }
848: if (vap->va_size != VNOVAL) {
849: nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
850: *tl++ = nfs_true;
851: txdr_hyper(&vap->va_size, tl);
852: } else {
853: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
854: *tl = nfs_false;
855: }
856: if (vap->va_atime.tv_sec != VNOVAL) {
857: if (vap->va_atime.tv_sec != time.tv_sec) {
858: nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
859: *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
860: txdr_nfsv3time(&vap->va_atime, tl);
861: } else {
862: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
863: *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
864: }
865: } else {
866: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
867: *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
868: }
869: if (vap->va_mtime.tv_sec != VNOVAL) {
870: if (vap->va_mtime.tv_sec != time.tv_sec) {
871: nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
872: *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
873: txdr_nfsv3time(&vap->va_mtime, tl);
874: } else {
875: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
876: *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
877: }
878: } else {
879: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
880: *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
881: }
882: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
883: *tl = nfs_false;
884: } else {
885: nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
886: if (vap->va_mode == (u_short)VNOVAL)
887: sp->sa_mode = VNOVAL;
888: else
889: sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
890: if (vap->va_uid == (uid_t)VNOVAL)
891: sp->sa_uid = VNOVAL;
892: else
893: sp->sa_uid = txdr_unsigned(vap->va_uid);
894: if (vap->va_gid == (gid_t)VNOVAL)
895: sp->sa_gid = VNOVAL;
896: else
897: sp->sa_gid = txdr_unsigned(vap->va_gid);
898: sp->sa_size = txdr_unsigned(vap->va_size);
899: txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
900: txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
901: }
902: nfsm_request(vp, NFSPROC_SETATTR, procp, cred);
903: if (v3) {
904: nfsm_wcc_data(vp, wccflag);
905: if (!wccflag)
906: VTONFS(vp)->n_attrstamp = 0;
907: } else
908: nfsm_loadattr(vp, (struct vattr *)0);
909: nfsm_reqdone;
910: return (error);
911: }
912:
913: /*
914: * nfs lookup call, one step at a time...
915: * First look in cache
916: * If not found, unlock the directory nfsnode and do the rpc
917: */
918: static int
919: nfs_lookup(ap)
920: struct vop_lookup_args /* {
921: struct vnodeop_desc *a_desc;
922: struct vnode *a_dvp;
923: struct vnode **a_vpp;
924: struct componentname *a_cnp;
925: } */ *ap;
926: {
927: register struct componentname *cnp = ap->a_cnp;
928: register struct vnode *dvp = ap->a_dvp;
929: register struct vnode **vpp = ap->a_vpp;
930: register int flags = cnp->cn_flags;
931: register struct vnode *newvp;
932: register u_long *tl;
933: register caddr_t cp;
934: register long t1, t2;
935: struct nfsmount *nmp;
936: caddr_t bpos, dpos, cp2;
937: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
938: long len;
939: nfsfh_t *fhp;
940: struct nfsnode *np;
941: int lockparent, wantparent, error = 0, attrflag, fhsize;
942: int v3 = NFS_ISV3(dvp);
943: struct proc *p = cnp->cn_proc;
944:
945: if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
946: (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
947: return (EROFS);
948: *vpp = NULLVP;
949: if (dvp->v_type != VDIR)
950: return (ENOTDIR);
951: lockparent = flags & LOCKPARENT;
952: wantparent = flags & (LOCKPARENT|WANTPARENT);
953: nmp = VFSTONFS(dvp->v_mount);
954: np = VTONFS(dvp);
955: if ((error = cache_lookup(dvp, vpp, cnp)) && error != ENOENT) {
956: struct vattr vattr;
957: int vpid;
958:
959: if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, p))) {
960: *vpp = NULLVP;
961: return (error);
962: }
963:
964: newvp = *vpp;
965: vpid = newvp->v_id;
966: /*
967: * See the comment starting `Step through' in ufs/ufs_lookup.c
968: * for an explanation of the locking protocol
969: */
970: if (dvp == newvp) {
971: VREF(newvp);
972: error = 0;
973: } else if (flags & ISDOTDOT) {
974: VOP_UNLOCK(dvp, 0, p);
975: error = vget(newvp, LK_EXCLUSIVE, p);
976: if (!error && lockparent && (flags & ISLASTCN))
977: error = vn_lock(dvp, LK_EXCLUSIVE, p);
978: } else {
979: error = vget(newvp, LK_EXCLUSIVE, p);
980: if (!lockparent || error || !(flags & ISLASTCN))
981: VOP_UNLOCK(dvp, 0, p);
982: }
983: if (!error) {
984: if (vpid == newvp->v_id) {
985: if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, p)
986: && vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime) {
987: nfsstats.lookupcache_hits++;
988: if (cnp->cn_nameiop != LOOKUP &&
989: (flags & ISLASTCN))
990: cnp->cn_flags |= SAVENAME;
991: return (0);
992: }
993: cache_purge(newvp);
994: }
995: vput(newvp);
996: if (lockparent && dvp != newvp && (flags & ISLASTCN))
997: VOP_UNLOCK(dvp, 0, p);
998: }
999: error = vn_lock(dvp, LK_EXCLUSIVE, p);
1000: *vpp = NULLVP;
1001: if (error)
1002: return (error);
1003: }
1004: error = 0;
1005: newvp = NULLVP;
1006: nfsstats.lookupcache_misses++;
1007: nfsstats.rpccnt[NFSPROC_LOOKUP]++;
1008: len = cnp->cn_namelen;
1009: nfsm_reqhead(dvp, NFSPROC_LOOKUP,
1010: NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
1011: nfsm_fhtom(dvp, v3);
1012: nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
1013: nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
1014: if (error) {
1015: nfsm_postop_attr(dvp, attrflag);
1016: m_freem(mrep);
1017: goto nfsmout;
1018: }
1019: nfsm_getfh(fhp, fhsize, v3);
1020:
1021: /*
1022: * Handle RENAME case...
1023: */
1024: if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
1025: if (NFS_CMPFH(np, fhp, fhsize)) {
1026: m_freem(mrep);
1027: return (EISDIR);
1028: }
1029: if ((error = nfs_nget(dvp->v_mount, fhp, fhsize, &np))) {
1030: m_freem(mrep);
1031: return (error);
1032: }
1033: newvp = NFSTOV(np);
1034: if (v3) {
1035: nfsm_postop_attr(newvp, attrflag);
1036: nfsm_postop_attr(dvp, attrflag);
1037: } else
1038: nfsm_loadattr(newvp, (struct vattr *)0);
1039: *vpp = newvp;
1040: m_freem(mrep);
1041: cnp->cn_flags |= SAVENAME;
1042: if (!lockparent)
1043: VOP_UNLOCK(dvp, 0, p);
1044: return (0);
1045: }
1046:
1047: if (flags & ISDOTDOT) {
1048: VOP_UNLOCK(dvp, 0, p);
1049: error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
1050: if (error) {
1051: vn_lock(dvp, LK_EXCLUSIVE + LK_RETRY, p);
1052: return (error);
1053: }
1054: newvp = NFSTOV(np);
1055: if (lockparent && (flags & ISLASTCN) &&
1056: (error = vn_lock(dvp, LK_EXCLUSIVE, p))) {
1057: vput(newvp);
1058: return (error);
1059: }
1060: } else if (NFS_CMPFH(np, fhp, fhsize)) {
1061: VREF(dvp);
1062: newvp = dvp;
1063: } else {
1064: if ((error = nfs_nget(dvp->v_mount, fhp, fhsize, &np))) {
1065: m_freem(mrep);
1066: return (error);
1067: }
1068: if (!lockparent || !(flags & ISLASTCN))
1069: VOP_UNLOCK(dvp, 0, p);
1070: newvp = NFSTOV(np);
1071: }
1072: if (v3) {
1073: nfsm_postop_attr(newvp, attrflag);
1074: nfsm_postop_attr(dvp, attrflag);
1075: } else
1076: nfsm_loadattr(newvp, (struct vattr *)0);
1077: if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1078: cnp->cn_flags |= SAVENAME;
1079: if ((cnp->cn_flags & MAKEENTRY) &&
1080: (cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
1081: np->n_ctime = np->n_vattr.va_ctime.tv_sec;
1082: cache_enter(dvp, newvp, cnp);
1083: }
1084: *vpp = newvp;
1085: nfsm_reqdone;
1086: if (error) {
1087: if (newvp != NULLVP) {
1088: vrele(newvp);
1089: *vpp = NULLVP;
1090: }
1091: if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
1092: (flags & ISLASTCN) && error == ENOENT) {
1093: if (!lockparent)
1094: VOP_UNLOCK(dvp, 0, p);
1095: if (dvp->v_mount->mnt_flag & MNT_RDONLY)
1096: error = EROFS;
1097: else
1098: error = EJUSTRETURN;
1099: }
1100: if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
1101: cnp->cn_flags |= SAVENAME;
1102: }
1103: return (error);
1104: }
1105:
1106: /*
1107: * nfs read call.
1108: * Just call nfs_bioread() to do the work.
1109: */
1110: static int
1111: nfs_read(ap)
1112: struct vop_read_args /* {
1113: struct vnode *a_vp;
1114: struct uio *a_uio;
1115: int a_ioflag;
1116: struct ucred *a_cred;
1117: } */ *ap;
1118: {
1119: register struct vnode *vp = ap->a_vp;
1120:
1121: if (vp->v_type != VREG)
1122: return (EPERM);
1123: return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0));
1124: }
1125:
1126: /*
1127: * nfs readlink call
1128: */
1129: static int
1130: nfs_readlink(ap)
1131: struct vop_readlink_args /* {
1132: struct vnode *a_vp;
1133: struct uio *a_uio;
1134: struct ucred *a_cred;
1135: } */ *ap;
1136: {
1137: register struct vnode *vp = ap->a_vp;
1138:
1139: if (vp->v_type != VLNK)
1140: return (EPERM);
1141: return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0));
1142: }
1143:
1144: /*
1145: * Do a readlink rpc.
1146: * Called by nfs_doio() from below the buffer cache.
1147: */
1148: int
1149: nfs_readlinkrpc(vp, uiop, cred)
1150: register struct vnode *vp;
1151: struct uio *uiop;
1152: struct ucred *cred;
1153: {
1154: register u_long *tl;
1155: register caddr_t cp;
1156: register long t1, t2;
1157: caddr_t bpos, dpos, cp2;
1158: int error = 0, len, attrflag;
1159: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1160: int v3 = NFS_ISV3(vp);
1161:
1162: nfsstats.rpccnt[NFSPROC_READLINK]++;
1163: nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
1164: nfsm_fhtom(vp, v3);
1165: nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred);
1166: if (v3)
1167: nfsm_postop_attr(vp, attrflag);
1168: if (!error) {
1169: nfsm_strsiz(len, NFS_MAXPATHLEN);
1170: if (len == NFS_MAXPATHLEN) {
1171: struct nfsnode *np = VTONFS(vp);
1172: #if DIAGNOSTIC
1173: if (!np)
1174: panic("nfs_readlinkrpc: null np\n");
1175: #endif
1176: if (np->n_size && np->n_size < NFS_MAXPATHLEN)
1177: len = np->n_size;
1178: }
1179: nfsm_mtouio(uiop, len);
1180: }
1181: nfsm_reqdone;
1182: return (error);
1183: }
1184:
1185: /*
1186: * nfs read rpc call
1187: * Ditto above
1188: */
1189: int
1190: nfs_readrpc(vp, uiop, cred)
1191: register struct vnode *vp;
1192: struct uio *uiop;
1193: struct ucred *cred;
1194: {
1195: register u_long *tl;
1196: register caddr_t cp;
1197: register long t1, t2;
1198: caddr_t bpos, dpos, cp2;
1199: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1200: struct nfsmount *nmp;
1201: int error = 0, len, retlen, tsiz, eof, attrflag;
1202: int v3 = NFS_ISV3(vp);
1203:
1204: #ifndef nolint
1205: eof = 0;
1206: #endif
1207: nmp = VFSTONFS(vp->v_mount);
1208: tsiz = uiop->uio_resid;
1209: if (uiop->uio_offset + tsiz > 0xffffffff && !v3)
1210: return (EFBIG);
1211: while (tsiz > 0) {
1212: nfsstats.rpccnt[NFSPROC_READ]++;
1213: len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
1214: nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
1215: nfsm_fhtom(vp, v3);
1216: nfsm_build(tl, u_long *, NFSX_UNSIGNED * 3);
1217: if (v3) {
1218: txdr_hyper(&uiop->uio_offset, tl);
1219: *(tl + 2) = txdr_unsigned(len);
1220: } else {
1221: *tl++ = txdr_unsigned(uiop->uio_offset);
1222: *tl++ = txdr_unsigned(len);
1223: *tl = 0;
1224: }
1225: nfsm_request(vp, NFSPROC_READ, uiop->uio_procp, cred);
1226: if (v3) {
1227: nfsm_postop_attr(vp, attrflag);
1228: if (error) {
1229: m_freem(mrep);
1230: goto nfsmout;
1231: }
1232: nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
1233: eof = fxdr_unsigned(int, *(tl + 1));
1234: } else
1235: nfsm_loadattr(vp, (struct vattr *)0);
1236: nfsm_strsiz(retlen, nmp->nm_rsize);
1237: nfsm_mtouio(uiop, retlen);
1238: m_freem(mrep);
1239: tsiz -= retlen;
1240: if (v3) {
1241: if (eof || retlen == 0)
1242: tsiz = 0;
1243: } else if (retlen < len)
1244: tsiz = 0;
1245: }
1246: nfsmout:
1247: return (error);
1248: }
1249:
1250: /*
1251: * nfs write call
1252: */
1253: int
1254: nfs_writerpc(vp, uiop, cred, iomode, must_commit)
1255: register struct vnode *vp;
1256: register struct uio *uiop;
1257: struct ucred *cred;
1258: int *iomode, *must_commit;
1259: {
1260: register u_long *tl;
1261: register caddr_t cp;
1262: register int t1, t2, backup;
1263: caddr_t bpos, dpos, cp2;
1264: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1265: struct nfsmount *nmp = VFSTONFS(vp->v_mount);
1266: int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
1267: int v3 = NFS_ISV3(vp), committed = NFSV3WRITE_FILESYNC;
1268:
1269: #if DIAGNOSTIC
1270: if (uiop->uio_iovcnt != 1)
1271: panic("nfs: writerpc iovcnt > 1");
1272: #endif
1273: *must_commit = 0;
1274: tsiz = uiop->uio_resid;
1275: if (uiop->uio_offset + tsiz > 0xffffffff && !v3)
1276: return (EFBIG);
1277: while (tsiz > 0) {
1278: nfsstats.rpccnt[NFSPROC_WRITE]++;
1279: len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz;
1280: nfsm_reqhead(vp, NFSPROC_WRITE,
1281: NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
1282: nfsm_fhtom(vp, v3);
1283: if (v3) {
1284: nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED);
1285: txdr_hyper(&uiop->uio_offset, tl);
1286: tl += 2;
1287: *tl++ = txdr_unsigned(len);
1288: *tl++ = txdr_unsigned(*iomode);
1289: } else {
1290: nfsm_build(tl, u_long *, 4 * NFSX_UNSIGNED);
1291: *++tl = txdr_unsigned(uiop->uio_offset);
1292: tl += 2;
1293: }
1294: *tl = txdr_unsigned(len);
1295: nfsm_uiotom(uiop, len);
1296: nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp, cred);
1297: if (v3) {
1298: wccflag = NFSV3_WCCCHK;
1299: nfsm_wcc_data(vp, wccflag);
1300: if (!error) {
1301: nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED +
1302: NFSX_V3WRITEVERF);
1303: rlen = fxdr_unsigned(int, *tl++);
1304: if (rlen == 0) {
1305: error = NFSERR_IO;
1306: break;
1307: } else if (rlen < len) {
1308: backup = len - rlen;
1309: uiop->uio_iov->iov_base -= backup;
1310: uiop->uio_iov->iov_len += backup;
1311: uiop->uio_offset -= backup;
1312: uiop->uio_resid += backup;
1313: len = rlen;
1314: }
1315: commit = fxdr_unsigned(int, *tl++);
1316:
1317: /*
1318: * Return the lowest committment level
1319: * obtained by any of the RPCs.
1320: */
1321: if (committed == NFSV3WRITE_FILESYNC)
1322: committed = commit;
1323: else if (committed == NFSV3WRITE_DATASYNC &&
1324: commit == NFSV3WRITE_UNSTABLE)
1325: committed = commit;
1326: if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0) {
1327: bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1328: NFSX_V3WRITEVERF);
1329: nmp->nm_flag |= NFSMNT_HASWRITEVERF;
1330: } else if (bcmp((caddr_t)tl,
1331: (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
1332: *must_commit = 1;
1333: bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
1334: NFSX_V3WRITEVERF);
1335: }
1336: }
1337: } else
1338: nfsm_loadattr(vp, (struct vattr *)0);
1339: if (wccflag)
1340: VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr.va_mtime.tv_sec;
1341: m_freem(mrep);
1342: tsiz -= len;
1343: }
1344: nfsmout:
1345: if (vp->v_mount->mnt_flag & MNT_ASYNC)
1346: committed = NFSV3WRITE_FILESYNC;
1347: *iomode = committed;
1348: if (error)
1349: uiop->uio_resid = tsiz;
1350: return (error);
1351: }
1352:
1353: /*
1354: * nfs mknod rpc
1355: * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
1356: * mode set to specify the file type and the size field for rdev.
1357: */
1358: static int
1359: nfs_mknodrpc(dvp, vpp, cnp, vap)
1360: register struct vnode *dvp;
1361: register struct vnode **vpp;
1362: register struct componentname *cnp;
1363: register struct vattr *vap;
1364: {
1365: register struct nfsv2_sattr *sp;
1366: register struct nfsv3_sattr *sp3;
1367: register u_long *tl;
1368: register caddr_t cp;
1369: register long t1, t2;
1370: struct vnode *newvp = (struct vnode *)0;
1371: struct nfsnode *np = (struct nfsnode *)0;
1372: struct vattr vattr;
1373: char *cp2;
1374: caddr_t bpos, dpos;
1375: int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
1376: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1377: u_long rdev;
1378: int v3 = NFS_ISV3(dvp);
1379:
1380: if (vap->va_type == VCHR || vap->va_type == VBLK)
1381: rdev = txdr_unsigned(vap->va_rdev);
1382: else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
1383: rdev = 0xffffffff;
1384: else {
1385: VOP_ABORTOP(dvp, cnp);
1386: vput(dvp);
1387: return (EOPNOTSUPP);
1388: }
1389: if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc))) {
1390: VOP_ABORTOP(dvp, cnp);
1391: vput(dvp);
1392: return (error);
1393: }
1394: nfsstats.rpccnt[NFSPROC_MKNOD]++;
1395: nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
1396: + nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1397: nfsm_fhtom(dvp, v3);
1398: nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1399: if (v3) {
1400: nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3SRVSATTR);
1401: *tl++ = vtonfsv3_type(vap->va_type);
1402: sp3 = (struct nfsv3_sattr *)tl;
1403: nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid);
1404: if (vap->va_type == VCHR || vap->va_type == VBLK) {
1405: nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
1406: *tl++ = txdr_unsigned(major(vap->va_rdev));
1407: *tl = txdr_unsigned(minor(vap->va_rdev));
1408: }
1409: } else {
1410: nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1411: sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1412: sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
1413: sp->sa_gid = txdr_unsigned(vattr.va_gid);
1414: sp->sa_size = rdev;
1415: txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1416: txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1417: }
1418: nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred);
1419: if (!error) {
1420: nfsm_mtofh(dvp, newvp, v3, gotvp);
1421: if (!gotvp) {
1422: if (newvp) {
1423: vput(newvp);
1424: newvp = (struct vnode *)0;
1425: }
1426: error = nfs_lookitup(dvp, cnp->cn_nameptr,
1427: cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1428: if (!error)
1429: newvp = NFSTOV(np);
1430: }
1431: }
1432: if (v3)
1433: nfsm_wcc_data(dvp, wccflag);
1434: nfsm_reqdone;
1435: if (error) {
1436: if (newvp)
1437: vput(newvp);
1438: } else {
1439: if (cnp->cn_flags & MAKEENTRY)
1440: cache_enter(dvp, newvp, cnp);
1441: *vpp = newvp;
1442: }
1443: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
1444: VTONFS(dvp)->n_flag |= NMODIFIED;
1445: if (!wccflag)
1446: VTONFS(dvp)->n_attrstamp = 0;
1447: vput(dvp);
1448: return (error);
1449: }
1450:
1451: /*
1452: * nfs mknod vop
1453: * just call nfs_mknodrpc() to do the work.
1454: */
1455: /* ARGSUSED */
1456: static int
1457: nfs_mknod(ap)
1458: struct vop_mknod_args /* {
1459: struct vnode *a_dvp;
1460: struct vnode **a_vpp;
1461: struct componentname *a_cnp;
1462: struct vattr *a_vap;
1463: } */ *ap;
1464: {
1465: struct vnode *newvp;
1466: int error;
1467:
1468: error = nfs_mknodrpc(ap->a_dvp, &newvp, ap->a_cnp, ap->a_vap);
1469: if (!error)
1470: vput(newvp);
1471: return (error);
1472: }
1473:
1474: static u_long create_verf;
1475: /*
1476: * nfs file create call
1477: */
1478: static int
1479: nfs_create(ap)
1480: struct vop_create_args /* {
1481: struct vnode *a_dvp;
1482: struct vnode **a_vpp;
1483: struct componentname *a_cnp;
1484: struct vattr *a_vap;
1485: } */ *ap;
1486: {
1487: register struct vnode *dvp = ap->a_dvp;
1488: register struct vattr *vap = ap->a_vap;
1489: register struct componentname *cnp = ap->a_cnp;
1490: register struct nfsv2_sattr *sp;
1491: register struct nfsv3_sattr *sp3;
1492: register u_long *tl;
1493: register caddr_t cp;
1494: register long t1, t2;
1495: struct nfsnode *np = (struct nfsnode *)0;
1496: struct vnode *newvp = (struct vnode *)0;
1497: caddr_t bpos, dpos, cp2;
1498: int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
1499: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1500: struct vattr vattr;
1501: int v3 = NFS_ISV3(dvp);
1502:
1503: /*
1504: * Oops, not for me..
1505: */
1506: if (vap->va_type == VSOCK)
1507: return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
1508:
1509: if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc))) {
1510: VOP_ABORTOP(dvp, cnp);
1511: vput(dvp);
1512: return (error);
1513: }
1514: if (vap->va_vaflags & VA_EXCLUSIVE)
1515: fmode |= O_EXCL;
1516: again:
1517: nfsstats.rpccnt[NFSPROC_CREATE]++;
1518: nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
1519: nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
1520: nfsm_fhtom(dvp, v3);
1521: nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1522: if (v3) {
1523: nfsm_build(tl, u_long *, NFSX_UNSIGNED);
1524: if (fmode & O_EXCL) {
1525: *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
1526: nfsm_build(tl, u_long *, NFSX_V3CREATEVERF);
1527: if (!TAILQ_EMPTY(&in_ifaddrhead))
1528: *tl++ = IA_SIN(in_ifaddrhead.tqh_first)->sin_addr.s_addr;
1529: else
1530: *tl++ = create_verf;
1531: *tl = ++create_verf;
1532: } else {
1533: *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
1534: nfsm_build(tl, u_long *, NFSX_V3SRVSATTR);
1535: sp3 = (struct nfsv3_sattr *)tl;
1536: nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid);
1537: }
1538: } else {
1539: nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1540: sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
1541: sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
1542: sp->sa_gid = txdr_unsigned(vattr.va_gid);
1543: sp->sa_size = 0;
1544: txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1545: txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1546: }
1547: nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
1548: if (!error) {
1549: nfsm_mtofh(dvp, newvp, v3, gotvp);
1550: if (!gotvp) {
1551: if (newvp) {
1552: vput(newvp);
1553: newvp = (struct vnode *)0;
1554: }
1555: error = nfs_lookitup(dvp, cnp->cn_nameptr,
1556: cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
1557: if (!error)
1558: newvp = NFSTOV(np);
1559: }
1560: }
1561: if (v3)
1562: nfsm_wcc_data(dvp, wccflag);
1563: nfsm_reqdone;
1564: if (error) {
1565: if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
1566: fmode &= ~O_EXCL;
1567: goto again;
1568: }
1569: if (newvp)
1570: vput(newvp);
1571: } else if (v3 && (fmode & O_EXCL))
1572: error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc);
1573: if (!error) {
1574: if (cnp->cn_flags & MAKEENTRY)
1575: cache_enter(dvp, newvp, cnp);
1576: *ap->a_vpp = newvp;
1577: }
1578: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
1579: VTONFS(dvp)->n_flag |= NMODIFIED;
1580: if (!wccflag)
1581: VTONFS(dvp)->n_attrstamp = 0;
1582: vput(dvp);
1583: return (error);
1584: }
1585:
1586: /*
1587: * nfs file remove call
1588: * To try and make nfs semantics closer to ufs semantics, a file that has
1589: * other processes using the vnode is renamed instead of removed and then
1590: * removed later on the last close.
1591: * - If v_usecount > 1
1592: * If a rename is not already in the works
1593: * call nfs_sillyrename() to set it up
1594: * else
1595: * do the remove rpc
1596: */
1597: static int
1598: nfs_remove(ap)
1599: struct vop_remove_args /* {
1600: struct vnodeop_desc *a_desc;
1601: struct vnode * a_dvp;
1602: struct vnode * a_vp;
1603: struct componentname * a_cnp;
1604: } */ *ap;
1605: {
1606: register struct vnode *vp = ap->a_vp;
1607: register struct vnode *dvp = ap->a_dvp;
1608: register struct componentname *cnp = ap->a_cnp;
1609: register struct nfsnode *np = VTONFS(vp);
1610: int error = 0;
1611: struct vattr vattr;
1612:
1613: #if DIAGNOSTIC
1614: if ((cnp->cn_flags & HASBUF) == 0)
1615: panic("nfs_remove: no name");
1616: if (vp->v_usecount < 1)
1617: panic("nfs_remove: bad v_usecount");
1618: #endif
1619: if (vp->v_usecount == 1 || (np->n_sillyrename &&
1620: VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 &&
1621: vattr.va_nlink > 1)) {
1622: /*
1623: * Purge the name cache so that the chance of a lookup for
1624: * the name succeeding while the remove is in progress is
1625: * minimized. Without node locking it can still happen, such
1626: * that an I/O op returns ESTALE, but since you get this if
1627: * another host removes the file..
1628: */
1629: cache_purge(vp);
1630: /*
1631: * throw away biocache buffers, mainly to avoid
1632: * unnecessary delayed writes later.
1633: */
1634: error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
1635: /* Do the rpc */
1636: if (error != EINTR)
1637: error = nfs_removerpc(dvp, cnp->cn_nameptr,
1638: cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc);
1639: /*
1640: * Kludge City: If the first reply to the remove rpc is lost..
1641: * the reply to the retransmitted request will be ENOENT
1642: * since the file was in fact removed
1643: * Therefore, we cheat and return success.
1644: */
1645: if (error == ENOENT)
1646: error = 0;
1647: } else if (!np->n_sillyrename)
1648: error = nfs_sillyrename(dvp, vp, cnp);
1649: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
1650: np->n_attrstamp = 0;
1651: vput(dvp);
1652: if (vp == dvp)
1653: vrele(vp);
1654: else
1655: vput(vp);
1656: return (error);
1657: }
1658:
1659: /*
1660: * nfs file remove rpc called from nfs_inactive
1661: */
1662: int
1663: nfs_removeit(sp)
1664: register struct sillyrename *sp;
1665: {
1666:
1667: return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
1668: (struct proc *)0));
1669: }
1670:
1671: /*
1672: * Nfs remove rpc, called from nfs_remove() and nfs_removeit().
1673: */
1674: static int
1675: nfs_removerpc(dvp, name, namelen, cred, proc)
1676: register struct vnode *dvp;
1677: char *name;
1678: int namelen;
1679: struct ucred *cred;
1680: struct proc *proc;
1681: {
1682: register u_long *tl;
1683: register caddr_t cp;
1684: register long t1, t2;
1685: caddr_t bpos, dpos, cp2;
1686: int error = 0, wccflag = NFSV3_WCCRATTR;
1687: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1688: int v3 = NFS_ISV3(dvp);
1689:
1690: nfsstats.rpccnt[NFSPROC_REMOVE]++;
1691: nfsm_reqhead(dvp, NFSPROC_REMOVE,
1692: NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
1693: nfsm_fhtom(dvp, v3);
1694: nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
1695: nfsm_request(dvp, NFSPROC_REMOVE, proc, cred);
1696: if (v3)
1697: nfsm_wcc_data(dvp, wccflag);
1698: nfsm_reqdone;
1699: VTONFS(dvp)->n_flag |= NMODIFIED;
1700: if (!wccflag)
1701: VTONFS(dvp)->n_attrstamp = 0;
1702: return (error);
1703: }
1704:
1705: /*
1706: * nfs file rename call
1707: */
1708: static int
1709: nfs_rename(ap)
1710: struct vop_rename_args /* {
1711: struct vnode *a_fdvp;
1712: struct vnode *a_fvp;
1713: struct componentname *a_fcnp;
1714: struct vnode *a_tdvp;
1715: struct vnode *a_tvp;
1716: struct componentname *a_tcnp;
1717: } */ *ap;
1718: {
1719: register struct vnode *fvp = ap->a_fvp;
1720: register struct vnode *tvp = ap->a_tvp;
1721: register struct vnode *fdvp = ap->a_fdvp;
1722: register struct vnode *tdvp = ap->a_tdvp;
1723: register struct componentname *tcnp = ap->a_tcnp;
1724: register struct componentname *fcnp = ap->a_fcnp;
1725: int error;
1726:
1727: #if DIAGNOSTIC
1728: if ((tcnp->cn_flags & HASBUF) == 0 ||
1729: (fcnp->cn_flags & HASBUF) == 0)
1730: panic("nfs_rename: no name");
1731: #endif
1732: /* Check for cross-device rename */
1733: if ((fvp->v_mount != tdvp->v_mount) ||
1734: (tvp && (fvp->v_mount != tvp->v_mount))) {
1735: error = EXDEV;
1736: goto out;
1737: }
1738:
1739: /*
1740: * If the tvp exists and is in use, sillyrename it before doing the
1741: * rename of the new file over it.
1742: * XXX Can't sillyrename a directory.
1743: */
1744: if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
1745: tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
1746: vput(tvp);
1747: tvp = NULL;
1748: }
1749:
1750: error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
1751: tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
1752: tcnp->cn_proc);
1753:
1754: if (fvp->v_type == VDIR) {
1755: if (tvp != NULL && tvp->v_type == VDIR)
1756: cache_purge(tdvp);
1757: cache_purge(fdvp);
1758: }
1759: out:
1760: if (tdvp == tvp)
1761: vrele(tdvp);
1762: else
1763: vput(tdvp);
1764: if (tvp)
1765: vput(tvp);
1766: vrele(fdvp);
1767: vrele(fvp);
1768: /*
1769: * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
1770: */
1771: if (error == ENOENT)
1772: error = 0;
1773: return (error);
1774: }
1775:
1776: /*
1777: * nfs file rename rpc called from nfs_remove() above
1778: */
1779: static int
1780: nfs_renameit(sdvp, scnp, sp)
1781: struct vnode *sdvp;
1782: struct componentname *scnp;
1783: register struct sillyrename *sp;
1784: {
1785: return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
1786: sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc));
1787: }
1788:
1789: /*
1790: * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
1791: */
1792: static int
1793: nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc)
1794: register struct vnode *fdvp;
1795: char *fnameptr;
1796: int fnamelen;
1797: register struct vnode *tdvp;
1798: char *tnameptr;
1799: int tnamelen;
1800: struct ucred *cred;
1801: struct proc *proc;
1802: {
1803: register u_long *tl;
1804: register caddr_t cp;
1805: register long t1, t2;
1806: caddr_t bpos, dpos, cp2;
1807: int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
1808: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1809: int v3 = NFS_ISV3(fdvp);
1810:
1811: nfsstats.rpccnt[NFSPROC_RENAME]++;
1812: nfsm_reqhead(fdvp, NFSPROC_RENAME,
1813: (NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
1814: nfsm_rndup(tnamelen));
1815: nfsm_fhtom(fdvp, v3);
1816: nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
1817: nfsm_fhtom(tdvp, v3);
1818: nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
1819: nfsm_request(fdvp, NFSPROC_RENAME, proc, cred);
1820: if (v3) {
1821: nfsm_wcc_data(fdvp, fwccflag);
1822: nfsm_wcc_data(tdvp, twccflag);
1823: }
1824: nfsm_reqdone;
1825: VTONFS(fdvp)->n_flag |= NMODIFIED;
1826: VTONFS(tdvp)->n_flag |= NMODIFIED;
1827: if (!fwccflag)
1828: VTONFS(fdvp)->n_attrstamp = 0;
1829: if (!twccflag)
1830: VTONFS(tdvp)->n_attrstamp = 0;
1831: return (error);
1832: }
1833:
1834: /*
1835: * nfs hard link create call
1836: */
1837: static int
1838: nfs_link(ap)
1839: struct vop_link_args /* {
1840: struct vnode *a_vp;
1841: struct vnode *a_tdvp;
1842: struct componentname *a_cnp;
1843: } */ *ap;
1844: {
1845: register struct vnode *vp = ap->a_vp;
1846: register struct vnode *tdvp = ap->a_tdvp;
1847: register struct componentname *cnp = ap->a_cnp;
1848: register u_long *tl;
1849: register caddr_t cp;
1850: register long t1, t2;
1851: caddr_t bpos, dpos, cp2;
1852: int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
1853: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1854: int v3 = NFS_ISV3(vp);
1855:
1856: if (vp->v_mount != tdvp->v_mount) {
1857: VOP_ABORTOP(vp, cnp);
1858: if (tdvp == vp)
1859: vrele(tdvp);
1860: else
1861: vput(tdvp);
1862: return (EXDEV);
1863: }
1864:
1865: /*
1866: * Push all writes to the server, so that the attribute cache
1867: * doesn't get "out of sync" with the server.
1868: * XXX There should be a better way!
1869: */
1870: VOP_FSYNC(vp, cnp->cn_cred, MNT_WAIT, cnp->cn_proc);
1871:
1872: nfsstats.rpccnt[NFSPROC_LINK]++;
1873: nfsm_reqhead(vp, NFSPROC_LINK,
1874: NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
1875: nfsm_fhtom(vp, v3);
1876: nfsm_fhtom(tdvp, v3);
1877: nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1878: nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
1879: if (v3) {
1880: nfsm_postop_attr(vp, attrflag);
1881: nfsm_wcc_data(tdvp, wccflag);
1882: }
1883: nfsm_reqdone;
1884: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
1885: VTONFS(tdvp)->n_flag |= NMODIFIED;
1886: if (!attrflag)
1887: VTONFS(vp)->n_attrstamp = 0;
1888: if (!wccflag)
1889: VTONFS(tdvp)->n_attrstamp = 0;
1890: vput(tdvp);
1891: /*
1892: * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1893: */
1894: if (error == EEXIST)
1895: error = 0;
1896: return (error);
1897: }
1898:
1899: /*
1900: * nfs symbolic link create call
1901: */
1902: static int
1903: nfs_symlink(ap)
1904: struct vop_symlink_args /* {
1905: struct vnode *a_dvp;
1906: struct vnode **a_vpp;
1907: struct componentname *a_cnp;
1908: struct vattr *a_vap;
1909: char *a_target;
1910: } */ *ap;
1911: {
1912: register struct vnode *dvp = ap->a_dvp;
1913: register struct vattr *vap = ap->a_vap;
1914: register struct componentname *cnp = ap->a_cnp;
1915: register struct nfsv2_sattr *sp;
1916: register struct nfsv3_sattr *sp3;
1917: register u_long *tl;
1918: register caddr_t cp;
1919: register long t1, t2;
1920: caddr_t bpos, dpos, cp2;
1921: int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
1922: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1923: struct vnode *newvp = (struct vnode *)0;
1924: int v3 = NFS_ISV3(dvp);
1925:
1926: nfsstats.rpccnt[NFSPROC_SYMLINK]++;
1927: slen = strlen(ap->a_target);
1928: nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
1929: nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
1930: nfsm_fhtom(dvp, v3);
1931: nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
1932: if (v3) {
1933: nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR);
1934: nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid,
1935: cnp->cn_cred->cr_gid);
1936: }
1937: nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
1938: if (!v3) {
1939: nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
1940: sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
1941: sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
1942: sp->sa_gid = txdr_unsigned(cnp->cn_cred->cr_gid);
1943: sp->sa_size = -1;
1944: txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
1945: txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
1946: }
1947: nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
1948: if (v3) {
1949: if (!error)
1950: nfsm_mtofh(dvp, newvp, v3, gotvp);
1951: nfsm_wcc_data(dvp, wccflag);
1952: }
1953: nfsm_reqdone;
1954: if (newvp)
1955: vput(newvp);
1956: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
1957: VTONFS(dvp)->n_flag |= NMODIFIED;
1958: if (!wccflag)
1959: VTONFS(dvp)->n_attrstamp = 0;
1960: vput(dvp);
1961: /*
1962: * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
1963: */
1964: if (error == EEXIST)
1965: error = 0;
1966: return (error);
1967: }
1968:
1969: /*
1970: * nfs make dir call
1971: */
1972: static int
1973: nfs_mkdir(ap)
1974: struct vop_mkdir_args /* {
1975: struct vnode *a_dvp;
1976: struct vnode **a_vpp;
1977: struct componentname *a_cnp;
1978: struct vattr *a_vap;
1979: } */ *ap;
1980: {
1981: register struct vnode *dvp = ap->a_dvp;
1982: register struct vattr *vap = ap->a_vap;
1983: register struct componentname *cnp = ap->a_cnp;
1984: register struct nfsv2_sattr *sp;
1985: register struct nfsv3_sattr *sp3;
1986: register u_long *tl;
1987: register caddr_t cp;
1988: register long t1, t2;
1989: register int len;
1990: struct nfsnode *np = (struct nfsnode *)0;
1991: struct vnode *newvp = (struct vnode *)0;
1992: caddr_t bpos, dpos, cp2;
1993: int error = 0, wccflag = NFSV3_WCCRATTR;
1994: int gotvp = 0;
1995: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
1996: struct vattr vattr;
1997: int v3 = NFS_ISV3(dvp);
1998:
1999: if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_proc))) {
2000: VOP_ABORTOP(dvp, cnp);
2001: vput(dvp);
2002: return (error);
2003: }
2004: len = cnp->cn_namelen;
2005: nfsstats.rpccnt[NFSPROC_MKDIR]++;
2006: nfsm_reqhead(dvp, NFSPROC_MKDIR,
2007: NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
2008: nfsm_fhtom(dvp, v3);
2009: nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
2010: if (v3) {
2011: nfsm_build(sp3, struct nfsv3_sattr *, NFSX_V3SRVSATTR);
2012: nfsm_v3sattr(sp3, vap, cnp->cn_cred->cr_uid, vattr.va_gid);
2013: } else {
2014: nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
2015: sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
2016: sp->sa_uid = txdr_unsigned(cnp->cn_cred->cr_uid);
2017: sp->sa_gid = txdr_unsigned(vattr.va_gid);
2018: sp->sa_size = -1;
2019: txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
2020: txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
2021: }
2022: nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
2023: if (!error)
2024: nfsm_mtofh(dvp, newvp, v3, gotvp);
2025: if (v3)
2026: nfsm_wcc_data(dvp, wccflag);
2027: nfsm_reqdone;
2028: VTONFS(dvp)->n_flag |= NMODIFIED;
2029: if (!wccflag)
2030: VTONFS(dvp)->n_attrstamp = 0;
2031: /*
2032: * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
2033: * if we can succeed in looking up the directory.
2034: */
2035: if (error == EEXIST || (!error && !gotvp)) {
2036: if (newvp) {
2037: vrele(newvp);
2038: newvp = (struct vnode *)0;
2039: }
2040: error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
2041: cnp->cn_proc, &np);
2042: if (!error) {
2043: newvp = NFSTOV(np);
2044: if (newvp->v_type != VDIR)
2045: error = EEXIST;
2046: }
2047: }
2048: if (error) {
2049: if (newvp)
2050: vrele(newvp);
2051: } else
2052: *ap->a_vpp = newvp;
2053: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
2054: vput(dvp);
2055: return (error);
2056: }
2057:
2058: /*
2059: * nfs remove directory call
2060: */
2061: static int
2062: nfs_rmdir(ap)
2063: struct vop_rmdir_args /* {
2064: struct vnode *a_dvp;
2065: struct vnode *a_vp;
2066: struct componentname *a_cnp;
2067: } */ *ap;
2068: {
2069: register struct vnode *vp = ap->a_vp;
2070: register struct vnode *dvp = ap->a_dvp;
2071: register struct componentname *cnp = ap->a_cnp;
2072: register u_long *tl;
2073: register caddr_t cp;
2074: register long t1, t2;
2075: caddr_t bpos, dpos, cp2;
2076: int error = 0, wccflag = NFSV3_WCCRATTR;
2077: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2078: int v3 = NFS_ISV3(dvp);
2079:
2080: nfsstats.rpccnt[NFSPROC_RMDIR]++;
2081: nfsm_reqhead(dvp, NFSPROC_RMDIR,
2082: NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
2083: nfsm_fhtom(dvp, v3);
2084: nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
2085: nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
2086: if (v3)
2087: nfsm_wcc_data(dvp, wccflag);
2088: nfsm_reqdone;
2089: FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
2090: VTONFS(dvp)->n_flag |= NMODIFIED;
2091: if (!wccflag)
2092: VTONFS(dvp)->n_attrstamp = 0;
2093: cache_purge(dvp);
2094: cache_purge(vp);
2095: vput(vp);
2096: vput(dvp);
2097: /*
2098: * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
2099: */
2100: if (error == ENOENT)
2101: error = 0;
2102: return (error);
2103: }
2104:
2105: /*
2106: * nfs readdir call
2107: */
2108: static int
2109: nfs_readdir(ap)
2110: struct vop_readdir_args /* {
2111: struct vnode *a_vp;
2112: struct uio *a_uio;
2113: struct ucred *a_cred;
2114: } */ *ap;
2115: {
2116: register struct vnode *vp = ap->a_vp;
2117: register struct nfsnode *np = VTONFS(vp);
2118: register struct uio *uio = ap->a_uio;
2119: int tresid, error;
2120: struct vattr vattr;
2121:
2122: if (vp->v_type != VDIR)
2123: return (EPERM);
2124: /*
2125: * First, check for hit on the EOF offset cache
2126: */
2127: if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
2128: (np->n_flag & NMODIFIED) == 0) {
2129: if (VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) {
2130: if (NQNFS_CKCACHABLE(vp, ND_READ)) {
2131: nfsstats.direofcache_hits++;
2132: return (0);
2133: }
2134: } else if (VOP_GETATTR(vp, &vattr, ap->a_cred, uio->uio_procp) == 0 &&
2135: np->n_mtime == vattr.va_mtime.tv_sec) {
2136: nfsstats.direofcache_hits++;
2137: return (0);
2138: }
2139: }
2140:
2141: /*
2142: * Call nfs_bioread() to do the real work.
2143: */
2144: tresid = uio->uio_resid;
2145: error = nfs_bioread(vp, uio, 0, ap->a_cred, 0);
2146:
2147: if (!error && uio->uio_resid == tresid)
2148: nfsstats.direofcache_misses++;
2149: return (error);
2150: }
2151:
2152: /*
2153: * Readdir rpc call.
2154: * Called from below the buffer cache by nfs_doio().
2155: */
2156: int
2157: nfs_readdirrpc(vp, uiop, cred)
2158: struct vnode *vp;
2159: register struct uio *uiop;
2160: struct ucred *cred;
2161:
2162: {
2163: register int len, left;
2164: register struct dirent *dp;
2165: register u_long *tl;
2166: register caddr_t cp;
2167: register long t1, t2;
2168: register nfsuint64 *cookiep;
2169: caddr_t bpos, dpos, cp2;
2170: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2171: nfsuint64 cookie;
2172: struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2173: struct nfsnode *dnp = VTONFS(vp);
2174: u_quad_t fileno;
2175: int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
2176: int attrflag;
2177: int v3 = NFS_ISV3(vp);
2178:
2179: #ifndef nolint
2180: dp = (struct dirent *)0;
2181: #endif
2182: #if DIAGNOSTIC
2183: if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (NFS_DIRBLKSIZ - 1)) ||
2184: (uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
2185: panic("nfs readdirrpc bad uio");
2186: #endif
2187:
2188: /*
2189: * If there is no cookie, assume directory was stale.
2190: */
2191: cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2192: if (cookiep)
2193: cookie = *cookiep;
2194: else
2195: return (NFSERR_BAD_COOKIE);
2196: /*
2197: * Loop around doing readdir rpc's of size nm_readdirsize
2198: * truncated to a multiple of DIRBLKSIZ.
2199: * The stopping criteria is EOF or buffer full.
2200: */
2201: while (more_dirs && bigenough) {
2202: nfsstats.rpccnt[NFSPROC_READDIR]++;
2203: nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
2204: NFSX_READDIR(v3));
2205: nfsm_fhtom(vp, v3);
2206: if (v3) {
2207: nfsm_build(tl, u_long *, 5 * NFSX_UNSIGNED);
2208: *tl++ = cookie.nfsuquad[0];
2209: *tl++ = cookie.nfsuquad[1];
2210: *tl++ = dnp->n_cookieverf.nfsuquad[0];
2211: *tl++ = dnp->n_cookieverf.nfsuquad[1];
2212: } else {
2213: nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED);
2214: *tl++ = cookie.nfsuquad[0];
2215: }
2216: *tl = txdr_unsigned(nmp->nm_readdirsize);
2217: nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
2218: if (v3) {
2219: nfsm_postop_attr(vp, attrflag);
2220: if (!error) {
2221: nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
2222: dnp->n_cookieverf.nfsuquad[0] = *tl++;
2223: dnp->n_cookieverf.nfsuquad[1] = *tl;
2224: } else {
2225: m_freem(mrep);
2226: goto nfsmout;
2227: }
2228: }
2229: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2230: more_dirs = fxdr_unsigned(int, *tl);
2231:
2232: /* loop thru the dir entries, doctoring them to 4bsd form */
2233: while (more_dirs && bigenough) {
2234: if (v3) {
2235: nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
2236: fxdr_hyper(tl, &fileno);
2237: len = fxdr_unsigned(int, *(tl + 2));
2238: } else {
2239: nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
2240: fileno = fxdr_unsigned(u_quad_t, *tl++);
2241: len = fxdr_unsigned(int, *tl);
2242: }
2243: if (len <= 0 || len > NFS_MAXNAMLEN) {
2244: error = EBADRPC;
2245: m_freem(mrep);
2246: goto nfsmout;
2247: }
2248: tlen = nfsm_rndup(len);
2249: if (tlen == len)
2250: tlen += 4; /* To ensure null termination */
2251: left = DIRBLKSIZ - blksiz;
2252: if ((tlen + DIRHDSIZ) > left) {
2253: dp->d_reclen += left;
2254: uiop->uio_iov->iov_base += left;
2255: uiop->uio_iov->iov_len -= left;
2256: uiop->uio_offset += left;
2257: uiop->uio_resid -= left;
2258: blksiz = 0;
2259: }
2260: if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2261: bigenough = 0;
2262: if (bigenough) {
2263: dp = (struct dirent *)uiop->uio_iov->iov_base;
2264: dp->d_fileno = (int)fileno;
2265: dp->d_namlen = len;
2266: dp->d_reclen = tlen + DIRHDSIZ;
2267: dp->d_type = DT_UNKNOWN;
2268: blksiz += dp->d_reclen;
2269: if (blksiz == DIRBLKSIZ)
2270: blksiz = 0;
2271: uiop->uio_offset += DIRHDSIZ;
2272: uiop->uio_resid -= DIRHDSIZ;
2273: uiop->uio_iov->iov_base += DIRHDSIZ;
2274: uiop->uio_iov->iov_len -= DIRHDSIZ;
2275: nfsm_mtouio(uiop, len);
2276: cp = uiop->uio_iov->iov_base;
2277: tlen -= len;
2278: *cp = '\0'; /* null terminate */
2279: uiop->uio_iov->iov_base += tlen;
2280: uiop->uio_iov->iov_len -= tlen;
2281: uiop->uio_offset += tlen;
2282: uiop->uio_resid -= tlen;
2283: } else
2284: nfsm_adv(nfsm_rndup(len));
2285: if (v3) {
2286: nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
2287: } else {
2288: nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED);
2289: }
2290: if (bigenough) {
2291: cookie.nfsuquad[0] = *tl++;
2292: if (v3)
2293: cookie.nfsuquad[1] = *tl++;
2294: } else if (v3)
2295: tl += 2;
2296: else
2297: tl++;
2298: more_dirs = fxdr_unsigned(int, *tl);
2299: }
2300: /*
2301: * If at end of rpc data, get the eof boolean
2302: */
2303: if (!more_dirs) {
2304: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2305: more_dirs = (fxdr_unsigned(int, *tl) == 0);
2306: }
2307: m_freem(mrep);
2308: }
2309: /*
2310: * Fill last record, iff any, out to a multiple of DIRBLKSIZ
2311: * by increasing d_reclen for the last record.
2312: */
2313: if (blksiz > 0) {
2314: left = DIRBLKSIZ - blksiz;
2315: dp->d_reclen += left;
2316: uiop->uio_iov->iov_base += left;
2317: uiop->uio_iov->iov_len -= left;
2318: uiop->uio_offset += left;
2319: uiop->uio_resid -= left;
2320: }
2321:
2322: /*
2323: * We are now either at the end of the directory or have filled the
2324: * block.
2325: */
2326: if (bigenough)
2327: dnp->n_direofoffset = uiop->uio_offset;
2328: else {
2329: if (uiop->uio_resid > 0)
2330: printf("EEK! readdirrpc resid > 0\n");
2331: cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2332: *cookiep = cookie;
2333: }
2334: nfsmout:
2335: return (error);
2336: }
2337:
2338: /*
2339: * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
2340: */
2341: int
2342: nfs_readdirplusrpc(vp, uiop, cred)
2343: struct vnode *vp;
2344: register struct uio *uiop;
2345: struct ucred *cred;
2346: {
2347: register int len, left;
2348: register struct dirent *dp;
2349: register u_long *tl;
2350: register caddr_t cp;
2351: register long t1, t2;
2352: register struct vnode *newvp;
2353: register nfsuint64 *cookiep;
2354: caddr_t bpos, dpos, cp2, dpossav1, dpossav2;
2355: struct mbuf *mreq, *mrep, *md, *mb, *mb2, *mdsav1, *mdsav2;
2356: struct nameidata nami, *ndp = &nami;
2357: struct componentname *cnp = &ndp->ni_cnd;
2358: nfsuint64 cookie;
2359: struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2360: struct nfsnode *dnp = VTONFS(vp), *np;
2361: nfsfh_t *fhp;
2362: u_quad_t fileno;
2363: int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
2364: int attrflag, fhsize;
2365:
2366: #ifndef nolint
2367: dp = (struct dirent *)0;
2368: #endif
2369: #if DIAGNOSTIC
2370: if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) ||
2371: (uiop->uio_resid & (DIRBLKSIZ - 1)))
2372: panic("nfs readdirplusrpc bad uio");
2373: #endif
2374: ndp->ni_dvp = vp;
2375: newvp = NULLVP;
2376:
2377: /*
2378: * If there is no cookie, assume directory was stale.
2379: */
2380: cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0);
2381: if (cookiep)
2382: cookie = *cookiep;
2383: else
2384: return (NFSERR_BAD_COOKIE);
2385: /*
2386: * Loop around doing readdir rpc's of size nm_readdirsize
2387: * truncated to a multiple of DIRBLKSIZ.
2388: * The stopping criteria is EOF or buffer full.
2389: */
2390: while (more_dirs && bigenough) {
2391: nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
2392: nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
2393: NFSX_FH(1) + 6 * NFSX_UNSIGNED);
2394: nfsm_fhtom(vp, 1);
2395: nfsm_build(tl, u_long *, 6 * NFSX_UNSIGNED);
2396: *tl++ = cookie.nfsuquad[0];
2397: *tl++ = cookie.nfsuquad[1];
2398: *tl++ = dnp->n_cookieverf.nfsuquad[0];
2399: *tl++ = dnp->n_cookieverf.nfsuquad[1];
2400: *tl++ = txdr_unsigned(nmp->nm_readdirsize);
2401: *tl = txdr_unsigned(nmp->nm_rsize);
2402: nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred);
2403: nfsm_postop_attr(vp, attrflag);
2404: if (error) {
2405: m_freem(mrep);
2406: goto nfsmout;
2407: }
2408: nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
2409: dnp->n_cookieverf.nfsuquad[0] = *tl++;
2410: dnp->n_cookieverf.nfsuquad[1] = *tl++;
2411: more_dirs = fxdr_unsigned(int, *tl);
2412:
2413: /* loop thru the dir entries, doctoring them to 4bsd form */
2414: while (more_dirs && bigenough) {
2415: nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
2416: fxdr_hyper(tl, &fileno);
2417: len = fxdr_unsigned(int, *(tl + 2));
2418: if (len <= 0 || len > NFS_MAXNAMLEN) {
2419: error = EBADRPC;
2420: m_freem(mrep);
2421: goto nfsmout;
2422: }
2423: tlen = nfsm_rndup(len);
2424: if (tlen == len)
2425: tlen += 4; /* To ensure null termination*/
2426: left = DIRBLKSIZ - blksiz;
2427: if ((tlen + DIRHDSIZ) > left) {
2428: dp->d_reclen += left;
2429: uiop->uio_iov->iov_base += left;
2430: uiop->uio_iov->iov_len -= left;
2431: uiop->uio_offset += left;
2432: uiop->uio_resid -= left;
2433: blksiz = 0;
2434: }
2435: if ((tlen + DIRHDSIZ) > uiop->uio_resid)
2436: bigenough = 0;
2437: if (bigenough) {
2438: dp = (struct dirent *)uiop->uio_iov->iov_base;
2439: dp->d_fileno = (int)fileno;
2440: dp->d_namlen = len;
2441: dp->d_reclen = tlen + DIRHDSIZ;
2442: dp->d_type = DT_UNKNOWN;
2443: blksiz += dp->d_reclen;
2444: if (blksiz == DIRBLKSIZ)
2445: blksiz = 0;
2446: uiop->uio_offset += DIRHDSIZ;
2447: uiop->uio_resid -= DIRHDSIZ;
2448: uiop->uio_iov->iov_base += DIRHDSIZ;
2449: uiop->uio_iov->iov_len -= DIRHDSIZ;
2450: cnp->cn_nameptr = uiop->uio_iov->iov_base;
2451: cnp->cn_namelen = len;
2452: nfsm_mtouio(uiop, len);
2453: cp = uiop->uio_iov->iov_base;
2454: tlen -= len;
2455: *cp = '\0';
2456: uiop->uio_iov->iov_base += tlen;
2457: uiop->uio_iov->iov_len -= tlen;
2458: uiop->uio_offset += tlen;
2459: uiop->uio_resid -= tlen;
2460: } else
2461: nfsm_adv(nfsm_rndup(len));
2462: nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED);
2463: if (bigenough) {
2464: cookie.nfsuquad[0] = *tl++;
2465: cookie.nfsuquad[1] = *tl++;
2466: } else
2467: tl += 2;
2468:
2469: /*
2470: * Since the attributes are before the file handle
2471: * (sigh), we must skip over the attributes and then
2472: * come back and get them.
2473: */
2474: attrflag = fxdr_unsigned(int, *tl);
2475: if (attrflag) {
2476: dpossav1 = dpos;
2477: mdsav1 = md;
2478: nfsm_adv(NFSX_V3FATTR);
2479: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2480: doit = fxdr_unsigned(int, *tl);
2481: if (doit) {
2482: nfsm_getfh(fhp, fhsize, 1);
2483: if (NFS_CMPFH(dnp, fhp, fhsize)) {
2484: VREF(vp);
2485: newvp = vp;
2486: np = dnp;
2487: } else {
2488: if ((error = nfs_nget(vp->v_mount, fhp,
2489: fhsize, &np)))
2490: doit = 0;
2491: else
2492: newvp = NFSTOV(np);
2493: }
2494: }
2495: if (doit) {
2496: dpossav2 = dpos;
2497: dpos = dpossav1;
2498: mdsav2 = md;
2499: md = mdsav1;
2500: nfsm_loadattr(newvp, (struct vattr *)0);
2501: dpos = dpossav2;
2502: md = mdsav2;
2503: dp->d_type =
2504: IFTODT(VTTOIF(np->n_vattr.va_type));
2505: ndp->ni_vp = newvp;
2506: cnp->cn_hash = 0;
2507: for (cp = cnp->cn_nameptr, i = 1; i <= len;
2508: i++, cp++)
2509: cnp->cn_hash += (unsigned char)*cp * i;
2510: if (cnp->cn_namelen <= NCHNAMLEN)
2511: cache_enter(ndp->ni_dvp, ndp->ni_vp, cnp);
2512: }
2513: } else {
2514: /* Just skip over the file handle */
2515: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2516: i = fxdr_unsigned(int, *tl);
2517: nfsm_adv(nfsm_rndup(i));
2518: }
2519: if (newvp != NULLVP) {
2520: vrele(newvp);
2521: newvp = NULLVP;
2522: }
2523: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2524: more_dirs = fxdr_unsigned(int, *tl);
2525: }
2526: /*
2527: * If at end of rpc data, get the eof boolean
2528: */
2529: if (!more_dirs) {
2530: nfsm_dissect(tl, u_long *, NFSX_UNSIGNED);
2531: more_dirs = (fxdr_unsigned(int, *tl) == 0);
2532: }
2533: m_freem(mrep);
2534: }
2535: /*
2536: * Fill last record, iff any, out to a multiple of NFS_DIRBLKSIZ
2537: * by increasing d_reclen for the last record.
2538: */
2539: if (blksiz > 0) {
2540: left = DIRBLKSIZ - blksiz;
2541: dp->d_reclen += left;
2542: uiop->uio_iov->iov_base += left;
2543: uiop->uio_iov->iov_len -= left;
2544: uiop->uio_offset += left;
2545: uiop->uio_resid -= left;
2546: }
2547:
2548: /*
2549: * We are now either at the end of the directory or have filled the
2550: * block.
2551: */
2552: if (bigenough)
2553: dnp->n_direofoffset = uiop->uio_offset;
2554: else {
2555: if (uiop->uio_resid > 0)
2556: printf("EEK! readdirplusrpc resid > 0\n");
2557: cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1);
2558: *cookiep = cookie;
2559: }
2560: nfsmout:
2561: if (newvp != NULLVP) {
2562: if (newvp == vp)
2563: vrele(newvp);
2564: else
2565: vput(newvp);
2566: newvp = NULLVP;
2567: }
2568: return (error);
2569: }
2570:
2571: /*
2572: * Silly rename. To make the NFS filesystem that is stateless look a little
2573: * more like the "ufs" a remove of an active vnode is translated to a rename
2574: * to a funny looking filename that is removed by nfs_inactive on the
2575: * nfsnode. There is the potential for another process on a different client
2576: * to create the same funny name between the nfs_lookitup() fails and the
2577: * nfs_rename() completes, but...
2578: */
2579: static int
2580: nfs_sillyrename(dvp, vp, cnp)
2581: struct vnode *dvp, *vp;
2582: struct componentname *cnp;
2583: {
2584: register struct sillyrename *sp;
2585: struct nfsnode *np;
2586: int error;
2587: short pid;
2588: struct ucred *cred;
2589:
2590: cache_purge(dvp);
2591: np = VTONFS(vp);
2592: #if DIAGNOSTIC
2593: if (vp->v_type == VDIR)
2594: panic("nfs: sillyrename dir");
2595: #endif
2596: MALLOC_ZONE(sp, struct sillyrename *,
2597: sizeof (struct sillyrename), M_NFSREQ, M_WAITOK);
2598: sp->s_cred = crdup(cnp->cn_cred);
2599: sp->s_dvp = dvp;
2600: VREF(dvp);
2601:
2602: /* Fudge together a funny name */
2603: pid = cnp->cn_proc->p_pid;
2604: sp->s_namlen = sprintf(sp->s_name, ".nfsA%04x4.4", pid);
2605:
2606: /* Try lookitups until we get one that isn't there */
2607: while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2608: cnp->cn_proc, (struct nfsnode **)0) == 0) {
2609: sp->s_name[4]++;
2610: if (sp->s_name[4] > 'z') {
2611: error = EINVAL;
2612: goto bad;
2613: }
2614: }
2615: if ((error = nfs_renameit(dvp, cnp, sp)))
2616: goto bad;
2617: error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
2618: cnp->cn_proc, &np);
2619: NFS_DPF(SILLY,
2620: ("nfs_sillyrename: %s, vp=%x, np=%x, dvp=%x\n",
2621: &sp->s_name[0], (unsigned)vp, (unsigned)np, (unsigned)dvp));
2622: np->n_sillyrename = sp;
2623: return (0);
2624: bad:
2625: vrele(sp->s_dvp);
2626: cred = sp->s_cred;
2627: sp->s_cred = NOCRED;
2628: crfree(cred);
2629: _FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
2630: return (error);
2631: }
2632:
2633: /*
2634: * Look up a file name and optionally either update the file handle or
2635: * allocate an nfsnode, depending on the value of npp.
2636: * npp == NULL --> just do the lookup
2637: * *npp == NULL --> allocate a new nfsnode and make sure attributes are
2638: * handled too
2639: * *npp != NULL --> update the file handle in the vnode
2640: */
2641: static int
2642: nfs_lookitup(dvp, name, len, cred, procp, npp)
2643: register struct vnode *dvp;
2644: char *name;
2645: int len;
2646: struct ucred *cred;
2647: struct proc *procp;
2648: struct nfsnode **npp;
2649: {
2650: register u_long *tl;
2651: register caddr_t cp;
2652: register long t1, t2;
2653: struct vnode *newvp = (struct vnode *)0;
2654: struct nfsnode *np, *dnp = VTONFS(dvp);
2655: caddr_t bpos, dpos, cp2;
2656: int error = 0, fhlen, attrflag;
2657: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2658: nfsfh_t *nfhp;
2659: int v3 = NFS_ISV3(dvp);
2660:
2661: nfsstats.rpccnt[NFSPROC_LOOKUP]++;
2662: nfsm_reqhead(dvp, NFSPROC_LOOKUP,
2663: NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
2664: nfsm_fhtom(dvp, v3);
2665: nfsm_strtom(name, len, NFS_MAXNAMLEN);
2666: nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred);
2667: if (npp && !error) {
2668: nfsm_getfh(nfhp, fhlen, v3);
2669: if (*npp) {
2670: np = *npp;
2671: if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
2672: _FREE_ZONE((caddr_t)np->n_fhp,
2673: np->n_fhsize, M_NFSBIGFH);
2674: np->n_fhp = &np->n_fh;
2675: } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
2676: MALLOC_ZONE(np->n_fhp, nfsfh_t *,
2677: fhlen, M_NFSBIGFH, M_WAITOK);
2678: bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen);
2679: np->n_fhsize = fhlen;
2680: newvp = NFSTOV(np);
2681: } else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
2682: VREF(dvp);
2683: newvp = dvp;
2684: } else {
2685: error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
2686: if (error) {
2687: m_freem(mrep);
2688: return (error);
2689: }
2690: newvp = NFSTOV(np);
2691: }
2692: if (v3) {
2693: nfsm_postop_attr(newvp, attrflag);
2694: if (!attrflag && *npp == NULL) {
2695: m_freem(mrep);
2696: if (newvp == dvp)
2697: vrele(newvp);
2698: else
2699: vput(newvp);
2700: return (ENOENT);
2701: }
2702: } else
2703: nfsm_loadattr(newvp, (struct vattr *)0);
2704: }
2705: nfsm_reqdone;
2706: if (npp && *npp == NULL) {
2707: if (error) {
2708: if (newvp)
2709: if (newvp == dvp)
2710: vrele(newvp);
2711: else
2712: vput(newvp);
2713: } else
2714: *npp = np;
2715: }
2716: return (error);
2717: }
2718:
2719: /*
2720: * Nfs Version 3 commit rpc
2721: */
2722: static int
2723: nfs_commit(vp, offset, cnt, cred, procp)
2724: register struct vnode *vp;
2725: u_quad_t offset;
2726: int cnt;
2727: struct ucred *cred;
2728: struct proc *procp;
2729: {
2730: register caddr_t cp;
2731: register u_long *tl;
2732: register int t1, t2;
2733: register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2734: caddr_t bpos, dpos, cp2;
2735: int error = 0, wccflag = NFSV3_WCCRATTR;
2736: struct mbuf *mreq, *mrep, *md, *mb, *mb2;
2737:
2738: if ((nmp->nm_flag & NFSMNT_HASWRITEVERF) == 0)
2739: return (0);
2740: nfsstats.rpccnt[NFSPROC_COMMIT]++;
2741: nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
2742: nfsm_fhtom(vp, 1);
2743: nfsm_build(tl, u_long *, 3 * NFSX_UNSIGNED);
2744: txdr_hyper(&offset, tl);
2745: tl += 2;
2746: *tl = txdr_unsigned(cnt);
2747: nfsm_request(vp, NFSPROC_COMMIT, procp, cred);
2748: nfsm_wcc_data(vp, wccflag);
2749: if (!error) {
2750: nfsm_dissect(tl, u_long *, NFSX_V3WRITEVERF);
2751: if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
2752: NFSX_V3WRITEVERF)) {
2753: bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf,
2754: NFSX_V3WRITEVERF);
2755: error = NFSERR_STALEWRITEVERF;
2756: }
2757: }
2758: nfsm_reqdone;
2759: return (error);
2760: }
2761:
2762: /*
2763: * Kludge City..
2764: * - make nfs_bmap() essentially a no-op that does no translation
2765: * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
2766: * (Maybe I could use the process's page mapping, but I was concerned that
2767: * Kernel Write might not be enabled and also figured copyout() would do
2768: * a lot more work than bcopy() and also it currently happens in the
2769: * context of the swapper process (2).
2770: */
2771: static int
2772: nfs_bmap(ap)
2773: struct vop_bmap_args /* {
2774: struct vnode *a_vp;
2775: daddr_t a_bn;
2776: struct vnode **a_vpp;
2777: daddr_t *a_bnp;
2778: int *a_runp;
2779: int *a_runb;
2780: } */ *ap;
2781: {
2782: register struct vnode *vp = ap->a_vp;
2783: #ifdef NeXT
2784: #warning nfs_bmap hardcoded devblocksize
2785: int devBlockSize=1024;
2786: #endif /* NeXT */
2787:
2788: if (ap->a_vpp != NULL)
2789: *ap->a_vpp = vp;
2790: if (ap->a_bnp != NULL)
2791: #ifdef NeXT
2792: *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize,
2793: devBlockSize);
2794: #else
2795: *ap->a_bnp = ap->a_bn * btodb(vp->v_mount->mnt_stat.f_iosize);
2796: #endif /* NeXT */
2797: if (ap->a_runp != NULL)
2798: *ap->a_runp = 0;
2799: #ifdef notyet
2800: if (ap->a_runb != NULL)
2801: *ap->a_runb = 0;
2802: #endif
2803: return (0);
2804: }
2805:
2806: /*
2807: * Strategy routine.
2808: * For async requests when nfsiod(s) are running, queue the request by
2809: * calling nfs_asyncio(), otherwise just all nfs_doio() to do the
2810: * request.
2811: */
2812: static int
2813: nfs_strategy(ap)
2814: struct vop_strategy_args *ap;
2815: {
2816: register struct buf *bp = ap->a_bp;
2817: struct ucred *cr;
2818: struct proc *p;
2819: int error = 0;
2820:
2821: if (bp->b_flags & B_PHYS)
2822: panic("nfs physio");
2823: if (bp->b_flags & B_ASYNC)
2824: p = (struct proc *)0;
2825: else
2826: p = current_proc(); /* XXX */
2827: if (bp->b_flags & B_READ)
2828: cr = bp->b_rcred;
2829: else
2830: cr = bp->b_wcred;
2831: /*
2832: * If the op is asynchronous and an i/o daemon is waiting
2833: * queue the request, wake it up and wait for completion
2834: * otherwise just do it ourselves.
2835: */
2836: if ((bp->b_flags & B_ASYNC) == 0 ||
2837: nfs_asyncio(bp, NOCRED))
2838: error = nfs_doio(bp, cr, p);
2839: return (error);
2840: }
2841:
2842: /*
2843: * Mmap a file
2844: *
2845: * NB Currently unsupported.
2846: */
2847: /* ARGSUSED */
2848: static int
2849: nfs_mmap(ap)
2850: struct vop_mmap_args /* {
2851: struct vnode *a_vp;
2852: int a_fflags;
2853: struct ucred *a_cred;
2854: struct proc *a_p;
2855: } */ *ap;
2856: {
2857:
2858: return (EINVAL);
2859: }
2860:
2861: /*
2862: * fsync vnode op. Just call nfs_flush() with commit == 1.
2863: */
2864: /* ARGSUSED */
2865: static int
2866: nfs_fsync(ap)
2867: struct vop_fsync_args /* {
2868: struct vnodeop_desc *a_desc;
2869: struct vnode * a_vp;
2870: struct ucred * a_cred;
2871: int a_waitfor;
2872: struct proc * a_p;
2873: } */ *ap;
2874: {
2875:
2876: return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_p, 1));
2877: }
2878:
2879: /*
2880: * Flush all the blocks associated with a vnode.
2881: * Walk through the buffer pool and push any dirty pages
2882: * associated with the vnode.
2883: */
2884: static int
2885: nfs_flush(vp, cred, waitfor, p, commit)
2886: register struct vnode *vp;
2887: struct ucred *cred;
2888: int waitfor;
2889: struct proc *p;
2890: int commit;
2891: {
2892: register struct nfsnode *np = VTONFS(vp);
2893: register struct buf *bp;
2894: register int i;
2895: struct buf *nbp;
2896: struct nfsmount *nmp = VFSTONFS(vp->v_mount);
2897: int s, error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
2898: int passone = 1;
2899: u_quad_t off, endoff, toff;
2900: struct ucred* wcred = NULL;
2901: struct buf **bvec = NULL;
2902: #ifndef NFS_COMMITBVECSIZ
2903: #define NFS_COMMITBVECSIZ 20
2904: #endif
2905: struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
2906: int bvecsize = 0, bveccount;
2907:
2908: if (nmp->nm_flag & NFSMNT_INT)
2909: slpflag = PCATCH;
2910: if (!commit)
2911: passone = 0;
2912: /*
2913: * A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
2914: * server, but nas not been committed to stable storage on the server
2915: * yet. On the first pass, the byte range is worked out and the commit
2916: * rpc is done. On the second pass, nfs_writebp() is called to do the
2917: * job.
2918: */
2919: again:
2920: if (vp->v_dirtyblkhd.lh_first)
2921: np->n_flag |= NMODIFIED;
2922: off = (u_quad_t)-1;
2923: endoff = 0;
2924: bvecpos = 0;
2925: if (NFS_ISV3(vp) && commit) {
2926: s = splbio();
2927: /*
2928: * Count up how many buffers waiting for a commit.
2929: */
2930: bveccount = 0;
2931: for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
2932: nbp = bp->b_vnbufs.le_next;
2933: if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
2934: == (B_DELWRI | B_NEEDCOMMIT))
2935: bveccount++;
2936: }
2937: /*
2938: * Allocate space to remember the list of bufs to commit. It is
2939: * important to use M_NOWAIT here to avoid a race with nfs_write.
2940: * If we can't get memory (for whatever reason), we will end up
2941: * committing the buffers one-by-one in the loop below.
2942: */
2943: if (bveccount > NFS_COMMITBVECSIZ) {
2944: if (bvec != NULL && bvec != bvec_on_stack)
2945: _FREE(bvec, M_TEMP);
2946: MALLOC(bvec, struct buf **,
2947: bveccount * sizeof(struct buf *), M_TEMP, M_NOWAIT);
2948: if (bvec == NULL) {
2949: bvec = bvec_on_stack;
2950: bvecsize = NFS_COMMITBVECSIZ;
2951: } else
2952: bvecsize = bveccount;
2953: } else {
2954: bvec = bvec_on_stack;
2955: bvecsize = NFS_COMMITBVECSIZ;
2956: }
2957: for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
2958: nbp = bp->b_vnbufs.le_next;
2959: if (bvecpos >= bvecsize)
2960: break;
2961: if ((bp->b_flags & (B_BUSY | B_DELWRI | B_NEEDCOMMIT))
2962: != (B_DELWRI | B_NEEDCOMMIT))
2963: continue;
2964: bremfree(bp);
2965: /*
2966: * Work out if all buffers are using the same cred
2967: * so we can deal with them all with one commit.
2968: */
2969: if (wcred == NULL)
2970: wcred = bp->b_wcred;
2971: else if (wcred != bp->b_wcred)
2972: wcred = NOCRED;
2973: bp->b_flags |= (B_BUSY | B_WRITEINPROG);
2974: vfs_busy_pages(bp, 1);
2975: /*
2976: * A list of these buffers is kept so that the
2977: * second loop knows which buffers have actually
2978: * been committed. This is necessary, since there
2979: * may be a race between the commit rpc and new
2980: * uncommitted writes on the file.
2981: */
2982: bvec[bvecpos++] = bp;
2983: toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
2984: bp->b_dirtyoff;
2985: if (toff < off)
2986: off = toff;
2987: toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
2988: if (toff > endoff)
2989: endoff = toff;
2990: }
2991: splx(s);
2992: }
2993: if (bvecpos > 0) {
2994: /*
2995: * Commit data on the server, as required.
2996: * If all bufs are using the same wcred, then use that with
2997: * one call for all of them, otherwise commit each one
2998: * separately.
2999: */
3000: if (wcred != NOCRED)
3001: retv = nfs_commit(vp, off, (int)(endoff - off),
3002: wcred, p);
3003: else {
3004: retv = 0;
3005: for (i = 0; i < bvecpos; i++) {
3006: off_t off, size;
3007: bp = bvec[i];
3008: off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
3009: bp->b_dirtyoff;
3010: size = (u_quad_t)(bp->b_dirtyend
3011: - bp->b_dirtyoff);
3012: retv = nfs_commit(vp, off, (int)size,
3013: bp->b_wcred, p);
3014: if (retv) break;
3015: }
3016: }
3017:
3018: if (retv == NFSERR_STALEWRITEVERF)
3019: nfs_clearcommit(vp->v_mount);
3020: /*
3021: * Now, either mark the blocks I/O done or mark the
3022: * blocks dirty, depending on whether the commit
3023: * succeeded.
3024: */
3025: for (i = 0; i < bvecpos; i++) {
3026: bp = bvec[i];
3027: bp->b_flags &= ~(B_NEEDCOMMIT | B_WRITEINPROG);
3028: if (retv) {
3029: vfs_unbusy_pages(bp);
3030: brelse(bp);
3031: } else {
3032: vp->v_numoutput++;
3033: bp->b_flags |= B_ASYNC;
3034: /* XXX CSM 12/4/97 Revisit when buffer cache upgraded */
3035: #ifdef notyet
3036: if (bp->b_flags & B_DELWRI) {
3037: --numdirtybuffers;
3038: if (needsbuffer) {
3039: vfs_bio_need_satisfy();
3040: }
3041: }
3042: #endif
3043: s = splbio();
3044: bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI);
3045: bp->b_dirtyoff = bp->b_dirtyend = 0;
3046: reassignbuf(bp, vp);
3047: splx(s);
3048: biodone(bp);
3049: }
3050: }
3051: }
3052:
3053: /*
3054: * Start/do any write(s) that are required.
3055: */
3056: loop:
3057: s = splbio();
3058: for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) {
3059: nbp = bp->b_vnbufs.le_next;
3060: if (bp->b_flags & B_BUSY) {
3061: if (waitfor != MNT_WAIT || passone)
3062: continue;
3063: bp->b_flags |= B_WANTED;
3064: error = tsleep((caddr_t)bp, slpflag | (PRIBIO + 1),
3065: "nfsfsync", slptimeo);
3066: splx(s);
3067: if (error) {
3068: if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
3069: error = EINTR;
3070: goto done;
3071: }
3072: if (slpflag == PCATCH) {
3073: slpflag = 0;
3074: slptimeo = 2 * hz;
3075: }
3076: }
3077: goto loop;
3078: }
3079: if ((bp->b_flags & B_DELWRI) == 0)
3080: panic("nfs_fsync: not dirty");
3081: if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT))
3082: continue;
3083: bremfree(bp);
3084: if (passone || !commit)
3085: bp->b_flags |= (B_BUSY|B_ASYNC);
3086: else
3087: bp->b_flags |= (B_BUSY|B_ASYNC|B_WRITEINPROG|B_NEEDCOMMIT);
3088: splx(s);
3089: VOP_BWRITE(bp);
3090: goto loop;
3091: }
3092: splx(s);
3093: if (passone) {
3094: passone = 0;
3095: goto again;
3096: }
3097: if (waitfor == MNT_WAIT) {
3098: while (vp->v_numoutput) {
3099: vp->v_flag |= VBWAIT;
3100: error = tsleep((caddr_t)&vp->v_numoutput,
3101: slpflag | (PRIBIO + 1), "nfsfsync", slptimeo);
3102: if (error) {
3103: if (nfs_sigintr(nmp, (struct nfsreq *)0, p)) {
3104: error = EINTR;
3105: goto done;
3106: }
3107: if (slpflag == PCATCH) {
3108: slpflag = 0;
3109: slptimeo = 2 * hz;
3110: }
3111: }
3112: }
3113: if (vp->v_dirtyblkhd.lh_first && commit) {
3114: goto loop;
3115: }
3116: }
3117: if (np->n_flag & NWRITEERR) {
3118: error = np->n_error;
3119: np->n_flag &= ~NWRITEERR;
3120: }
3121: done:
3122: if (bvec != NULL && bvec != bvec_on_stack)
3123: _FREE(bvec, M_TEMP);
3124: return (error);
3125: }
3126:
3127: /*
3128: * Return POSIX pathconf information applicable to nfs.
3129: *
3130: * The NFS V2 protocol doesn't support this, so just return EINVAL
3131: * for V2.
3132: */
3133: /* ARGSUSED */
3134: static int
3135: nfs_pathconf(ap)
3136: struct vop_pathconf_args /* {
3137: struct vnode *a_vp;
3138: int a_name;
3139: int *a_retval;
3140: } */ *ap;
3141: {
3142:
3143: return (EINVAL);
3144: }
3145:
3146: /*
3147: * NFS advisory byte-level locks.
3148: * Currently unsupported.
3149: */
3150: static int
3151: nfs_advlock(ap)
3152: struct vop_advlock_args /* {
3153: struct vnode *a_vp;
3154: caddr_t a_id;
3155: int a_op;
3156: struct flock *a_fl;
3157: int a_flags;
3158: } */ *ap;
3159: {
3160: #ifdef __FreeBSD__
3161: register struct nfsnode *np = VTONFS(ap->a_vp);
3162:
3163: /*
3164: * The following kludge is to allow diskless support to work
3165: * until a real NFS lockd is implemented. Basically, just pretend
3166: * that this is a local lock.
3167: */
3168: return (lf_advlock(ap, &(np->n_lockf), np->n_size));
3169: #else
3170: #if DIAGNOSTIC
3171: printf("nfs_advlock: pid %d comm %s\n", current_proc()->p_pid, current_proc()->p_comm);
3172: #endif
3173: return (EOPNOTSUPP);
3174: #endif
3175: }
3176:
3177: /*
3178: * Print out the contents of an nfsnode.
3179: */
3180: static int
3181: nfs_print(ap)
3182: struct vop_print_args /* {
3183: struct vnode *a_vp;
3184: } */ *ap;
3185: {
3186: register struct vnode *vp = ap->a_vp;
3187: register struct nfsnode *np = VTONFS(vp);
3188:
3189: printf("tag VT_NFS, fileid %ld fsid 0x%lx",
3190: np->n_vattr.va_fileid, np->n_vattr.va_fsid);
3191: if (vp->v_type == VFIFO)
3192: fifo_printinfo(vp);
3193: printf("\n");
3194: return (0);
3195: }
3196:
3197: /*
3198: * NFS directory offset lookup.
3199: * Currently unsupported.
3200: */
3201: static int
3202: nfs_blkatoff(ap)
3203: struct vop_blkatoff_args /* {
3204: struct vnode *a_vp;
3205: off_t a_offset;
3206: char **a_res;
3207: struct buf **a_bpp;
3208: } */ *ap;
3209: {
3210:
3211: #if DIAGNOSTIC
3212: printf("nfs_blkatoff: unimplemented!!");
3213: #endif
3214: return (EOPNOTSUPP);
3215: }
3216:
3217: /*
3218: * NFS flat namespace allocation.
3219: * Currently unsupported.
3220: */
3221: static int
3222: nfs_valloc(ap)
3223: struct vop_valloc_args /* {
3224: struct vnode *a_pvp;
3225: int a_mode;
3226: struct ucred *a_cred;
3227: struct vnode **a_vpp;
3228: } */ *ap;
3229: {
3230:
3231: return (EOPNOTSUPP);
3232: }
3233:
3234: /*
3235: * NFS flat namespace free.
3236: * Currently unsupported.
3237: */
3238: static int
3239: nfs_vfree(ap)
3240: struct vop_vfree_args /* {
3241: struct vnode *a_pvp;
3242: ino_t a_ino;
3243: int a_mode;
3244: } */ *ap;
3245: {
3246:
3247: #if DIAGNOSTIC
3248: printf("nfs_vfree: unimplemented!!");
3249: #endif
3250: return (EOPNOTSUPP);
3251: }
3252:
3253: /*
3254: * NFS file truncation.
3255: */
3256: static int
3257: nfs_truncate(ap)
3258: struct vop_truncate_args /* {
3259: struct vnode *a_vp;
3260: off_t a_length;
3261: int a_flags;
3262: struct ucred *a_cred;
3263: struct proc *a_p;
3264: } */ *ap;
3265: {
3266:
3267: /* Use nfs_setattr */
3268: #if DIAGNOSTIC
3269: printf("nfs_truncate: unimplemented!!");
3270: #endif
3271: return (EOPNOTSUPP);
3272: }
3273:
3274: /*
3275: * NFS update.
3276: */
3277: static int
3278: nfs_update(ap)
3279: struct vop_update_args /* {
3280: struct vnode *a_vp;
3281: struct timeval *a_ta;
3282: struct timeval *a_tm;
3283: int a_waitfor;
3284: } */ *ap;
3285: {
3286:
3287: /* Use nfs_setattr */
3288: #if DIAGNOSTIC
3289: printf("nfs_update: unimplemented!!");
3290: #endif
3291: return (EOPNOTSUPP);
3292: }
3293:
3294: int nfs_aio_threads = 0; /* 1 per nfd (arbitrary) */
3295: struct slock nfs_aio_slock;
3296: TAILQ_HEAD(bqueues, buf) nfs_aio_bufq;
3297: int nfs_aio_bufq_len = 0; /* diagnostic only */
3298:
3299: void
3300: nfs_aio_thread()
3301: { /* see comment below in nfs_bwrite() for some rationale */
3302: struct buf *bp;
3303: boolean_t funnel_state;
3304:
3305: funnel_state = thread_set_funneled(TRUE);
3306: for(;;) {
3307: simple_lock(&nfs_aio_slock);
3308: if ((bp = nfs_aio_bufq.tqh_first)) {
3309: TAILQ_REMOVE(&nfs_aio_bufq, bp, b_freelist);
3310: nfs_aio_bufq_len--;
3311: simple_unlock(&nfs_aio_slock);
3312: nfs_writebp(bp, 1);
3313: } else { /* nothing to do - goodnight */
3314: assert_wait(&nfs_aio_bufq, THREAD_UNINT);
3315: simple_unlock(&nfs_aio_slock);
3316: (void)tsleep((caddr_t)0, PRIBIO+1, "nfs_aio_bufq", 0);
3317: }
3318: }
3319: (void) thread_set_funneled(funnel_state);
3320: }
3321:
3322:
3323: void
3324: nfs_aio_thread_init()
3325: {
3326: if (nfs_aio_threads++ == 0) {
3327: simple_lock_init(&nfs_aio_slock);
3328: TAILQ_INIT(&nfs_aio_bufq);
3329: }
3330: kernel_thread(kernel_task, nfs_aio_thread);
3331: }
3332:
3333:
3334: /*
3335: * Just call nfs_writebp() with the force argument set to 1.
3336: */
3337: static int
3338: nfs_bwrite(ap)
3339: struct vop_bwrite_args /* {
3340: struct vnode *a_bp;
3341: } */ *ap;
3342: {
3343: extern void wakeup_one(caddr_t chan);
3344:
3345: /*
3346: * nfs_writebp will issue a synchronous rpc to if B_ASYNC then
3347: * to avoid distributed deadlocks we handoff the write to the
3348: * nfs_aio threads. Doing so allows us to complete the
3349: * current request, rather than blocking on a server which may
3350: * be ourself (or blocked on ourself).
3351: *
3352: * Note the loopback deadlocks happened when the thread
3353: * invoking us was nfsd, and also when it was the pagedaemon.
3354: *
3355: * This solution has one known problem. If *ALL* buffers get
3356: * on the nfs_aio queue then no forward progress can be made
3357: * until one of those writes complete. And if the current
3358: * nfs_aio writes-in-progress block due to a non-responsive server we
3359: * are in a deadlock circle. Probably the cure is to limit the
3360: * async write concurrency in getnewbuf as in FreeBSD 3.2.
3361: */
3362: if (nfs_aio_threads && (ap->a_bp->b_flags & B_ASYNC)) {
3363: simple_lock(&nfs_aio_slock);
3364: nfs_aio_bufq_len++;
3365: TAILQ_INSERT_TAIL(&nfs_aio_bufq, ap->a_bp, b_freelist);
3366: simple_unlock(&nfs_aio_slock);
3367: wakeup_one((caddr_t)&nfs_aio_bufq);
3368: return (0);
3369: }
3370: return (nfs_writebp(ap->a_bp, 1));
3371: }
3372:
3373: /*
3374: * This is a clone of vn_bwrite(), except that B_WRITEINPROG isn't set unless
3375: * the force flag is one and it also handles the B_NEEDCOMMIT flag.
3376: */
3377: int
3378: nfs_writebp(bp, force)
3379: register struct buf *bp;
3380: int force;
3381: {
3382: int s;
3383: register int oldflags = bp->b_flags, retv = 1;
3384: off_t off;
3385:
3386: if(!(bp->b_flags & B_BUSY))
3387: panic("nfs_writebp: buffer is not busy???");
3388:
3389: /* XXX CSM 12/4/97 Revisit when buffer cache upgraded */
3390: #ifdef notyet
3391: if (bp->b_flags & B_DELWRI) {
3392: --numdirtybuffers;
3393: if (needsbuffer)
3394: vfs_bio_need_satisfy();
3395: }
3396: #endif
3397: s = splbio();
3398: bp->b_flags &= ~(B_READ|B_DONE|B_ERROR|B_DELWRI);
3399:
3400: if ((oldflags & (B_ASYNC|B_DELWRI)) == (B_ASYNC|B_DELWRI)) {
3401: reassignbuf(bp, bp->b_vp);
3402: }
3403:
3404: bp->b_vp->v_numoutput++;
3405: current_proc()->p_stats->p_ru.ru_oublock++;
3406: splx(s);
3407:
3408: /*
3409: * If B_NEEDCOMMIT is set, a commit rpc may do the trick. If not
3410: * an actual write will have to be scheduled via. VOP_STRATEGY().
3411: * If B_WRITEINPROG is already set, then push it with a write anyhow.
3412: */
3413: vfs_busy_pages(bp, 1);
3414: if ((oldflags & (B_NEEDCOMMIT | B_WRITEINPROG)) == B_NEEDCOMMIT) {
3415: off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE + bp->b_dirtyoff;
3416: bp->b_flags |= B_WRITEINPROG;
3417: retv = nfs_commit(bp->b_vp, off, bp->b_dirtyend-bp->b_dirtyoff,
3418: bp->b_wcred, bp->b_proc);
3419: bp->b_flags &= ~B_WRITEINPROG;
3420: if (!retv) {
3421: bp->b_dirtyoff = bp->b_dirtyend = 0;
3422: bp->b_flags &= ~B_NEEDCOMMIT;
3423: biodone(bp);
3424: } else if (retv == NFSERR_STALEWRITEVERF)
3425: nfs_clearcommit(bp->b_vp->v_mount);
3426: }
3427: if (retv) {
3428: if (force)
3429: bp->b_flags |= B_WRITEINPROG;
3430: VOP_STRATEGY(bp);
3431: }
3432:
3433: if( (oldflags & B_ASYNC) == 0) {
3434: int rtval = biowait(bp);
3435:
3436: if (oldflags & B_DELWRI) {
3437: s = splbio();
3438: reassignbuf(bp, bp->b_vp);
3439: splx(s);
3440: }
3441: brelse(bp);
3442: return (rtval);
3443: }
3444:
3445: return (0);
3446: }
3447:
3448: /*
3449: * nfs special file access vnode op.
3450: * Essentially just get vattr and then imitate iaccess() since the device is
3451: * local to the client.
3452: */
3453: static int
3454: nfsspec_access(ap)
3455: struct vop_access_args /* {
3456: struct vnode *a_vp;
3457: int a_mode;
3458: struct ucred *a_cred;
3459: struct proc *a_p;
3460: } */ *ap;
3461: {
3462: register struct vattr *vap;
3463: register gid_t *gp;
3464: register struct ucred *cred = ap->a_cred;
3465: struct vnode *vp = ap->a_vp;
3466: mode_t mode = ap->a_mode;
3467: struct vattr vattr;
3468: register int i;
3469: int error;
3470:
3471: /*
3472: * Disallow write attempts on filesystems mounted read-only;
3473: * unless the file is a socket, fifo, or a block or character
3474: * device resident on the filesystem.
3475: */
3476: if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
3477: switch (vp->v_type) {
3478: case VREG: case VDIR: case VLNK:
3479: return (EROFS);
3480: }
3481: }
3482: /*
3483: * If you're the super-user,
3484: * you always get access.
3485: */
3486: if (cred->cr_uid == 0)
3487: return (0);
3488: vap = &vattr;
3489: error = VOP_GETATTR(vp, vap, cred, ap->a_p);
3490: if (error)
3491: return (error);
3492: /*
3493: * Access check is based on only one of owner, group, public.
3494: * If not owner, then check group. If not a member of the
3495: * group, then check public access.
3496: */
3497: if (cred->cr_uid != vap->va_uid) {
3498: mode >>= 3;
3499: gp = cred->cr_groups;
3500: for (i = 0; i < cred->cr_ngroups; i++, gp++)
3501: if (vap->va_gid == *gp)
3502: goto found;
3503: mode >>= 3;
3504: found:
3505: ;
3506: }
3507: error = (vap->va_mode & mode) == mode ? 0 : EACCES;
3508: return (error);
3509: }
3510:
3511: /*
3512: * Read wrapper for special devices.
3513: */
3514: static int
3515: nfsspec_read(ap)
3516: struct vop_read_args /* {
3517: struct vnode *a_vp;
3518: struct uio *a_uio;
3519: int a_ioflag;
3520: struct ucred *a_cred;
3521: } */ *ap;
3522: {
3523: register struct nfsnode *np = VTONFS(ap->a_vp);
3524:
3525: /*
3526: * Set access flag.
3527: */
3528: np->n_flag |= NACC;
3529: np->n_atim.tv_sec = time.tv_sec;
3530: np->n_atim.tv_nsec = time.tv_usec * 1000;
3531: return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
3532: }
3533:
3534: /*
3535: * Write wrapper for special devices.
3536: */
3537: static int
3538: nfsspec_write(ap)
3539: struct vop_write_args /* {
3540: struct vnode *a_vp;
3541: struct uio *a_uio;
3542: int a_ioflag;
3543: struct ucred *a_cred;
3544: } */ *ap;
3545: {
3546: register struct nfsnode *np = VTONFS(ap->a_vp);
3547:
3548: /*
3549: * Set update flag.
3550: */
3551: np->n_flag |= NUPD;
3552: np->n_mtim.tv_sec = time.tv_sec;
3553: np->n_mtim.tv_nsec = time.tv_usec * 1000;
3554: return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
3555: }
3556:
3557: /*
3558: * Close wrapper for special devices.
3559: *
3560: * Update the times on the nfsnode then do device close.
3561: */
3562: static int
3563: nfsspec_close(ap)
3564: struct vop_close_args /* {
3565: struct vnode *a_vp;
3566: int a_fflag;
3567: struct ucred *a_cred;
3568: struct proc *a_p;
3569: } */ *ap;
3570: {
3571: register struct vnode *vp = ap->a_vp;
3572: register struct nfsnode *np = VTONFS(vp);
3573: struct vattr vattr;
3574:
3575: if (np->n_flag & (NACC | NUPD)) {
3576: np->n_flag |= NCHG;
3577: if (vp->v_usecount == 1 &&
3578: (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3579: VATTR_NULL(&vattr);
3580: if (np->n_flag & NACC)
3581: vattr.va_atime = np->n_atim;
3582: if (np->n_flag & NUPD)
3583: vattr.va_mtime = np->n_mtim;
3584: (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3585: }
3586: }
3587: return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
3588: }
3589:
3590: /*
3591: * Read wrapper for fifos.
3592: */
3593: static int
3594: nfsfifo_read(ap)
3595: struct vop_read_args /* {
3596: struct vnode *a_vp;
3597: struct uio *a_uio;
3598: int a_ioflag;
3599: struct ucred *a_cred;
3600: } */ *ap;
3601: {
3602: extern int (**fifo_vnodeop_p)();
3603: register struct nfsnode *np = VTONFS(ap->a_vp);
3604:
3605: /*
3606: * Set access flag.
3607: */
3608: np->n_flag |= NACC;
3609: np->n_atim.tv_sec = time.tv_sec;
3610: np->n_atim.tv_nsec = time.tv_usec * 1000;
3611: return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
3612: }
3613:
3614: /*
3615: * Write wrapper for fifos.
3616: */
3617: static int
3618: nfsfifo_write(ap)
3619: struct vop_write_args /* {
3620: struct vnode *a_vp;
3621: struct uio *a_uio;
3622: int a_ioflag;
3623: struct ucred *a_cred;
3624: } */ *ap;
3625: {
3626: extern int (**fifo_vnodeop_p)();
3627: register struct nfsnode *np = VTONFS(ap->a_vp);
3628:
3629: /*
3630: * Set update flag.
3631: */
3632: np->n_flag |= NUPD;
3633: np->n_mtim.tv_sec = time.tv_sec;
3634: np->n_mtim.tv_nsec = time.tv_usec * 1000;
3635: return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
3636: }
3637:
3638: /*
3639: * Close wrapper for fifos.
3640: *
3641: * Update the times on the nfsnode then do fifo close.
3642: */
3643: static int
3644: nfsfifo_close(ap)
3645: struct vop_close_args /* {
3646: struct vnode *a_vp;
3647: int a_fflag;
3648: struct ucred *a_cred;
3649: struct proc *a_p;
3650: } */ *ap;
3651: {
3652: register struct vnode *vp = ap->a_vp;
3653: register struct nfsnode *np = VTONFS(vp);
3654: struct vattr vattr;
3655: extern int (**fifo_vnodeop_p)();
3656:
3657: if (np->n_flag & (NACC | NUPD)) {
3658: if (np->n_flag & NACC) {
3659: np->n_atim.tv_sec = time.tv_sec;
3660: np->n_atim.tv_nsec = time.tv_usec * 1000;
3661: }
3662: if (np->n_flag & NUPD) {
3663: np->n_mtim.tv_sec = time.tv_sec;
3664: np->n_mtim.tv_nsec = time.tv_usec * 1000;
3665: }
3666: np->n_flag |= NCHG;
3667: if (vp->v_usecount == 1 &&
3668: (vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
3669: VATTR_NULL(&vattr);
3670: if (np->n_flag & NACC)
3671: vattr.va_atime = np->n_atim;
3672: if (np->n_flag & NUPD)
3673: vattr.va_mtime = np->n_mtim;
3674: (void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
3675: }
3676: }
3677: return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
3678: }
3679:
3680: static int
3681: nfs_ioctl(ap)
3682: struct vop_ioctl_args *ap;
3683: {
3684:
3685: /*
3686: * XXX we were once bogusly enoictl() which returned this (ENOTTY).
3687: * Probably we should return ENODEV.
3688: */
3689: return (ENOTTY);
3690: }
3691:
3692: static int
3693: nfs_select(ap)
3694: struct vop_select_args *ap;
3695: {
3696:
3697: /*
3698: * We were once bogusly seltrue() which returns 1. Is this right?
3699: */
3700: return (1);
3701: }
3702:
3703: /* Pagein */
3704: nfs_pagein(ap)
3705: struct vop_pagein_args /* {
3706: struct vnode *a_vp;
3707: struct uio *a_uio;
3708: int a_ioflag;
3709: struct ucred *a_cred;
3710: } */ *ap;
3711: {
3712: struct vnode *vp=ap->a_vp;
3713: struct vm_info * vmp=vp->v_vm_info;
3714: struct ucred *reader_cred=ap->a_cred;
3715: if ((vp->v_vm_info) && vp->v_vm_info->cred) {
3716: reader_cred = vp->v_vm_info->cred;
3717: }
3718:
3719: return (VOP_READ(ap->a_vp, ap->a_uio, ap->a_ioflag, reader_cred));
3720: }
3721:
3722: /* Pageout */
3723: nfs_pageout(ap)
3724: struct vop_pageout_args /* {
3725: struct vnode *a_vp;
3726: struct uio *a_uio;
3727: int a_ioflag;
3728: struct ucred *a_cred;
3729: } */ *ap;
3730: {
3731: struct vnode *vp=ap->a_vp;
3732: struct vm_info * vmp=vp->v_vm_info;
3733: struct ucred *writer_cred=ap->a_cred;
3734: if ((vp->v_vm_info) && vp->v_vm_info->cred) {
3735: writer_cred = vp->v_vm_info->cred;
3736: }
3737:
3738: return (VOP_WRITE(ap->a_vp, ap->a_uio, ap->a_ioflag, writer_cred));
3739: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.