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vfs_vnops.c (1542) vfs_vnops.c (1549)
1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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55
56struct fileops vnops =
57 { vn_read, vn_write, vn_ioctl, vn_select, vn_closefile };
58
59/*
60 * Common code for vnode open operations.
61 * Check permissions, and call the VOP_OPEN or VOP_CREATE routine.
62 */
1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.

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55
56struct fileops vnops =
57 { vn_read, vn_write, vn_ioctl, vn_select, vn_closefile };
58
59/*
60 * Common code for vnode open operations.
61 * Check permissions, and call the VOP_OPEN or VOP_CREATE routine.
62 */
63int
63vn_open(ndp, fmode, cmode)
64 register struct nameidata *ndp;
65 int fmode, cmode;
66{
67 register struct vnode *vp;
68 register struct proc *p = ndp->ni_cnd.cn_proc;
69 register struct ucred *cred = p->p_ucred;
70 struct vattr vat;

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147 return (error);
148}
149
150/*
151 * Check for write permissions on the specified vnode.
152 * The read-only status of the file system is checked.
153 * Also, prototype text segments cannot be written.
154 */
64vn_open(ndp, fmode, cmode)
65 register struct nameidata *ndp;
66 int fmode, cmode;
67{
68 register struct vnode *vp;
69 register struct proc *p = ndp->ni_cnd.cn_proc;
70 register struct ucred *cred = p->p_ucred;
71 struct vattr vat;

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148 return (error);
149}
150
151/*
152 * Check for write permissions on the specified vnode.
153 * The read-only status of the file system is checked.
154 * Also, prototype text segments cannot be written.
155 */
156int
155vn_writechk(vp)
156 register struct vnode *vp;
157{
158
159 /*
160 * Disallow write attempts on read-only file systems;
161 * unless the file is a socket or a block or character
162 * device resident on the file system.

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175 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp))
176 return (ETXTBSY);
177 return (0);
178}
179
180/*
181 * Vnode close call
182 */
157vn_writechk(vp)
158 register struct vnode *vp;
159{
160
161 /*
162 * Disallow write attempts on read-only file systems;
163 * unless the file is a socket or a block or character
164 * device resident on the file system.

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177 if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp))
178 return (ETXTBSY);
179 return (0);
180}
181
182/*
183 * Vnode close call
184 */
185int
183vn_close(vp, flags, cred, p)
184 register struct vnode *vp;
185 int flags;
186 struct ucred *cred;
187 struct proc *p;
188{
189 int error;
190
191 if (flags & FWRITE)
192 vp->v_writecount--;
193 error = VOP_CLOSE(vp, flags, cred, p);
194 vrele(vp);
195 return (error);
196}
197
198/*
199 * Package up an I/O request on a vnode into a uio and do it.
200 */
186vn_close(vp, flags, cred, p)
187 register struct vnode *vp;
188 int flags;
189 struct ucred *cred;
190 struct proc *p;
191{
192 int error;
193
194 if (flags & FWRITE)
195 vp->v_writecount--;
196 error = VOP_CLOSE(vp, flags, cred, p);
197 vrele(vp);
198 return (error);
199}
200
201/*
202 * Package up an I/O request on a vnode into a uio and do it.
203 */
204int
201vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p)
202 enum uio_rw rw;
203 struct vnode *vp;
204 caddr_t base;
205 int len;
206 off_t offset;
207 enum uio_seg segflg;
208 int ioflg;

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238 if ((ioflg & IO_NODELOCKED) == 0)
239 VOP_UNLOCK(vp);
240 return (error);
241}
242
243/*
244 * File table vnode read routine.
245 */
205vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p)
206 enum uio_rw rw;
207 struct vnode *vp;
208 caddr_t base;
209 int len;
210 off_t offset;
211 enum uio_seg segflg;
212 int ioflg;

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242 if ((ioflg & IO_NODELOCKED) == 0)
243 VOP_UNLOCK(vp);
244 return (error);
245}
246
247/*
248 * File table vnode read routine.
249 */
250int
246vn_read(fp, uio, cred)
247 struct file *fp;
248 struct uio *uio;
249 struct ucred *cred;
250{
251 register struct vnode *vp = (struct vnode *)fp->f_data;
252 int count, error;
253

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260 fp->f_offset += count - uio->uio_resid;
261 VOP_UNLOCK(vp);
262 return (error);
263}
264
265/*
266 * File table vnode write routine.
267 */
251vn_read(fp, uio, cred)
252 struct file *fp;
253 struct uio *uio;
254 struct ucred *cred;
255{
256 register struct vnode *vp = (struct vnode *)fp->f_data;
257 int count, error;
258

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265 fp->f_offset += count - uio->uio_resid;
266 VOP_UNLOCK(vp);
267 return (error);
268}
269
270/*
271 * File table vnode write routine.
272 */
273int
268vn_write(fp, uio, cred)
269 struct file *fp;
270 struct uio *uio;
271 struct ucred *cred;
272{
273 register struct vnode *vp = (struct vnode *)fp->f_data;
274 int count, error, ioflag = 0;
275

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288 fp->f_offset += count - uio->uio_resid;
289 VOP_UNLOCK(vp);
290 return (error);
291}
292
293/*
294 * File table vnode stat routine.
295 */
274vn_write(fp, uio, cred)
275 struct file *fp;
276 struct uio *uio;
277 struct ucred *cred;
278{
279 register struct vnode *vp = (struct vnode *)fp->f_data;
280 int count, error, ioflag = 0;
281

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294 fp->f_offset += count - uio->uio_resid;
295 VOP_UNLOCK(vp);
296 return (error);
297}
298
299/*
300 * File table vnode stat routine.
301 */
302int
296vn_stat(vp, sb, p)
297 struct vnode *vp;
298 register struct stat *sb;
299 struct proc *p;
300{
301 struct vattr vattr;
302 register struct vattr *vap;
303 int error;

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352 sb->st_gen = vap->va_gen;
353 sb->st_blocks = vap->va_bytes / S_BLKSIZE;
354 return (0);
355}
356
357/*
358 * File table vnode ioctl routine.
359 */
303vn_stat(vp, sb, p)
304 struct vnode *vp;
305 register struct stat *sb;
306 struct proc *p;
307{
308 struct vattr vattr;
309 register struct vattr *vap;
310 int error;

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359 sb->st_gen = vap->va_gen;
360 sb->st_blocks = vap->va_bytes / S_BLKSIZE;
361 return (0);
362}
363
364/*
365 * File table vnode ioctl routine.
366 */
367int
360vn_ioctl(fp, com, data, p)
361 struct file *fp;
362 int com;
363 caddr_t data;
364 struct proc *p;
365{
366 register struct vnode *vp = ((struct vnode *)fp->f_data);
367 struct vattr vattr;

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394 }
395 return (error);
396 }
397}
398
399/*
400 * File table vnode select routine.
401 */
368vn_ioctl(fp, com, data, p)
369 struct file *fp;
370 int com;
371 caddr_t data;
372 struct proc *p;
373{
374 register struct vnode *vp = ((struct vnode *)fp->f_data);
375 struct vattr vattr;

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402 }
403 return (error);
404 }
405}
406
407/*
408 * File table vnode select routine.
409 */
410int
402vn_select(fp, which, p)
403 struct file *fp;
404 int which;
405 struct proc *p;
406{
407
408 return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag,
409 fp->f_cred, p));
410}
411
412/*
413 * File table vnode close routine.
414 */
411vn_select(fp, which, p)
412 struct file *fp;
413 int which;
414 struct proc *p;
415{
416
417 return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag,
418 fp->f_cred, p));
419}
420
421/*
422 * File table vnode close routine.
423 */
424int
415vn_closefile(fp, p)
416 struct file *fp;
417 struct proc *p;
418{
419
420 return (vn_close(((struct vnode *)fp->f_data), fp->f_flag,
421 fp->f_cred, p));
422}
425vn_closefile(fp, p)
426 struct file *fp;
427 struct proc *p;
428{
429
430 return (vn_close(((struct vnode *)fp->f_data), fp->f_flag,
431 fp->f_cred, p));
432}