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. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94
| 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. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)vfs_vnops.c 8.2 (Berkeley) 1/21/94
|
39 * $Id: vfs_vnops.c,v 1.20 1995/12/07 12:47:07 davidg Exp $
| 39 * $Id: vfs_vnops.c,v 1.21 1995/12/11 04:56:13 dyson Exp $
|
40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/file.h> 46#include <sys/stat.h> 47#include <sys/buf.h> 48#include <sys/proc.h> 49#include <sys/mount.h> 50#include <sys/namei.h> 51#include <sys/vnode.h> 52#include <sys/ioctl.h> 53 54#include <vm/vm.h> 55#include <vm/vm_param.h> 56#include <vm/vm_object.h> 57#include <vm/vnode_pager.h> 58
| 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/file.h> 46#include <sys/stat.h> 47#include <sys/buf.h> 48#include <sys/proc.h> 49#include <sys/mount.h> 50#include <sys/namei.h> 51#include <sys/vnode.h> 52#include <sys/ioctl.h> 53 54#include <vm/vm.h> 55#include <vm/vm_param.h> 56#include <vm/vm_object.h> 57#include <vm/vnode_pager.h> 58
|
| 59static int vn_closefile __P((struct file *fp, struct proc *p)); 60static int vn_ioctl __P((struct file *fp, int com, caddr_t data, 61 struct proc *p)); 62static int vn_read __P((struct file *fp, struct uio *uio, 63 struct ucred *cred)); 64static int vn_select __P((struct file *fp, int which, struct proc *p)); 65static int vn_vmio_open __P((struct vnode *vp, struct proc *p, 66 struct ucred *cred)); 67static int vn_write __P((struct file *fp, struct uio *uio, 68 struct ucred *cred)); 69
|
59struct fileops vnops = 60 { vn_read, vn_write, vn_ioctl, vn_select, vn_closefile }; 61 62/* 63 * Common code for vnode open operations. 64 * Check permissions, and call the VOP_OPEN or VOP_CREATE routine. 65 */ 66int 67vn_open(ndp, fmode, cmode) 68 register struct nameidata *ndp; 69 int fmode, cmode; 70{ 71 register struct vnode *vp; 72 register struct proc *p = ndp->ni_cnd.cn_proc; 73 register struct ucred *cred = p->p_ucred; 74 struct vattr vat; 75 struct vattr *vap = &vat; 76 int error; 77 78 if (fmode & O_CREAT) { 79 ndp->ni_cnd.cn_nameiop = CREATE; 80 ndp->ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 81 if ((fmode & O_EXCL) == 0) 82 ndp->ni_cnd.cn_flags |= FOLLOW; 83 error = namei(ndp); 84 if (error) 85 return (error); 86 if (ndp->ni_vp == NULL) { 87 VATTR_NULL(vap); 88 vap->va_type = VREG; 89 vap->va_mode = cmode; 90 LEASE_CHECK(ndp->ni_dvp, p, cred, LEASE_WRITE); 91 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 92 &ndp->ni_cnd, vap); 93 if (error) 94 return (error); 95 fmode &= ~O_TRUNC; 96 vp = ndp->ni_vp; 97 } else { 98 VOP_ABORTOP(ndp->ni_dvp, &ndp->ni_cnd); 99 if (ndp->ni_dvp == ndp->ni_vp) 100 vrele(ndp->ni_dvp); 101 else 102 vput(ndp->ni_dvp); 103 ndp->ni_dvp = NULL; 104 vp = ndp->ni_vp; 105 if (fmode & O_EXCL) { 106 error = EEXIST; 107 goto bad; 108 } 109 fmode &= ~O_CREAT; 110 } 111 } else { 112 ndp->ni_cnd.cn_nameiop = LOOKUP; 113 ndp->ni_cnd.cn_flags = FOLLOW | LOCKLEAF; 114 error = namei(ndp); 115 if (error) 116 return (error); 117 vp = ndp->ni_vp; 118 } 119 if (vp->v_type == VSOCK) { 120 error = EOPNOTSUPP; 121 goto bad; 122 } 123 if ((fmode & O_CREAT) == 0) { 124 if (fmode & FREAD) { 125 error = VOP_ACCESS(vp, VREAD, cred, p); 126 if (error) 127 goto bad; 128 } 129 if (fmode & (FWRITE | O_TRUNC)) { 130 if (vp->v_type == VDIR) { 131 error = EISDIR; 132 goto bad; 133 } 134 error = vn_writechk(vp); 135 if (error) 136 goto bad; 137 error = VOP_ACCESS(vp, VWRITE, cred, p); 138 if (error) 139 goto bad; 140 } 141 } 142 if (fmode & O_TRUNC) { 143 VOP_UNLOCK(vp); /* XXX */ 144 LEASE_CHECK(vp, p, cred, LEASE_WRITE); 145 VOP_LOCK(vp); /* XXX */ 146 VATTR_NULL(vap); 147 vap->va_size = 0; 148 error = VOP_SETATTR(vp, vap, cred, p); 149 if (error) 150 goto bad; 151 } 152 error = VOP_OPEN(vp, fmode, cred, p); 153 if (error) 154 goto bad; 155 /* 156 * this is here for VMIO support 157 */ 158 if (vp->v_type == VREG) { 159 if ((error = vn_vmio_open(vp, p, cred)) != 0) 160 goto bad; 161 } 162 if (fmode & FWRITE) 163 vp->v_writecount++; 164 return (0); 165bad: 166 vput(vp); 167 return (error); 168} 169 170/* 171 * Check for write permissions on the specified vnode. 172 * The read-only status of the file system is checked. 173 * Also, prototype text segments cannot be written. 174 */ 175int 176vn_writechk(vp) 177 register struct vnode *vp; 178{ 179 180 /* 181 * If there's shared text associated with 182 * the vnode, try to free it up once. If 183 * we fail, we can't allow writing. 184 */ 185 if (vp->v_flag & VTEXT) 186 return (ETXTBSY); 187 return (0); 188} 189 190/* 191 * Vnode close call 192 */ 193int 194vn_close(vp, flags, cred, p) 195 register struct vnode *vp; 196 int flags; 197 struct ucred *cred; 198 struct proc *p; 199{ 200 int error; 201 202 if (flags & FWRITE) 203 vp->v_writecount--; 204 error = VOP_CLOSE(vp, flags, cred, p); 205 vn_vmio_close(vp); 206 return (error); 207} 208 209/* 210 * Package up an I/O request on a vnode into a uio and do it. 211 */ 212int 213vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p) 214 enum uio_rw rw; 215 struct vnode *vp; 216 caddr_t base; 217 int len; 218 off_t offset; 219 enum uio_seg segflg; 220 int ioflg; 221 struct ucred *cred; 222 int *aresid; 223 struct proc *p; 224{ 225 struct uio auio; 226 struct iovec aiov; 227 int error; 228 229 if ((ioflg & IO_NODELOCKED) == 0) 230 VOP_LOCK(vp); 231 auio.uio_iov = &aiov; 232 auio.uio_iovcnt = 1; 233 aiov.iov_base = base; 234 aiov.iov_len = len; 235 auio.uio_resid = len; 236 auio.uio_offset = offset; 237 auio.uio_segflg = segflg; 238 auio.uio_rw = rw; 239 auio.uio_procp = p; 240 if (rw == UIO_READ) { 241 error = VOP_READ(vp, &auio, ioflg, cred); 242 } else { 243 error = VOP_WRITE(vp, &auio, ioflg, cred); 244 } 245 if (aresid) 246 *aresid = auio.uio_resid; 247 else 248 if (auio.uio_resid && error == 0) 249 error = EIO; 250 if ((ioflg & IO_NODELOCKED) == 0) 251 VOP_UNLOCK(vp); 252 return (error); 253} 254 255/* 256 * File table vnode read routine. 257 */
| 70struct fileops vnops = 71 { vn_read, vn_write, vn_ioctl, vn_select, vn_closefile }; 72 73/* 74 * Common code for vnode open operations. 75 * Check permissions, and call the VOP_OPEN or VOP_CREATE routine. 76 */ 77int 78vn_open(ndp, fmode, cmode) 79 register struct nameidata *ndp; 80 int fmode, cmode; 81{ 82 register struct vnode *vp; 83 register struct proc *p = ndp->ni_cnd.cn_proc; 84 register struct ucred *cred = p->p_ucred; 85 struct vattr vat; 86 struct vattr *vap = &vat; 87 int error; 88 89 if (fmode & O_CREAT) { 90 ndp->ni_cnd.cn_nameiop = CREATE; 91 ndp->ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; 92 if ((fmode & O_EXCL) == 0) 93 ndp->ni_cnd.cn_flags |= FOLLOW; 94 error = namei(ndp); 95 if (error) 96 return (error); 97 if (ndp->ni_vp == NULL) { 98 VATTR_NULL(vap); 99 vap->va_type = VREG; 100 vap->va_mode = cmode; 101 LEASE_CHECK(ndp->ni_dvp, p, cred, LEASE_WRITE); 102 error = VOP_CREATE(ndp->ni_dvp, &ndp->ni_vp, 103 &ndp->ni_cnd, vap); 104 if (error) 105 return (error); 106 fmode &= ~O_TRUNC; 107 vp = ndp->ni_vp; 108 } else { 109 VOP_ABORTOP(ndp->ni_dvp, &ndp->ni_cnd); 110 if (ndp->ni_dvp == ndp->ni_vp) 111 vrele(ndp->ni_dvp); 112 else 113 vput(ndp->ni_dvp); 114 ndp->ni_dvp = NULL; 115 vp = ndp->ni_vp; 116 if (fmode & O_EXCL) { 117 error = EEXIST; 118 goto bad; 119 } 120 fmode &= ~O_CREAT; 121 } 122 } else { 123 ndp->ni_cnd.cn_nameiop = LOOKUP; 124 ndp->ni_cnd.cn_flags = FOLLOW | LOCKLEAF; 125 error = namei(ndp); 126 if (error) 127 return (error); 128 vp = ndp->ni_vp; 129 } 130 if (vp->v_type == VSOCK) { 131 error = EOPNOTSUPP; 132 goto bad; 133 } 134 if ((fmode & O_CREAT) == 0) { 135 if (fmode & FREAD) { 136 error = VOP_ACCESS(vp, VREAD, cred, p); 137 if (error) 138 goto bad; 139 } 140 if (fmode & (FWRITE | O_TRUNC)) { 141 if (vp->v_type == VDIR) { 142 error = EISDIR; 143 goto bad; 144 } 145 error = vn_writechk(vp); 146 if (error) 147 goto bad; 148 error = VOP_ACCESS(vp, VWRITE, cred, p); 149 if (error) 150 goto bad; 151 } 152 } 153 if (fmode & O_TRUNC) { 154 VOP_UNLOCK(vp); /* XXX */ 155 LEASE_CHECK(vp, p, cred, LEASE_WRITE); 156 VOP_LOCK(vp); /* XXX */ 157 VATTR_NULL(vap); 158 vap->va_size = 0; 159 error = VOP_SETATTR(vp, vap, cred, p); 160 if (error) 161 goto bad; 162 } 163 error = VOP_OPEN(vp, fmode, cred, p); 164 if (error) 165 goto bad; 166 /* 167 * this is here for VMIO support 168 */ 169 if (vp->v_type == VREG) { 170 if ((error = vn_vmio_open(vp, p, cred)) != 0) 171 goto bad; 172 } 173 if (fmode & FWRITE) 174 vp->v_writecount++; 175 return (0); 176bad: 177 vput(vp); 178 return (error); 179} 180 181/* 182 * Check for write permissions on the specified vnode. 183 * The read-only status of the file system is checked. 184 * Also, prototype text segments cannot be written. 185 */ 186int 187vn_writechk(vp) 188 register struct vnode *vp; 189{ 190 191 /* 192 * If there's shared text associated with 193 * the vnode, try to free it up once. If 194 * we fail, we can't allow writing. 195 */ 196 if (vp->v_flag & VTEXT) 197 return (ETXTBSY); 198 return (0); 199} 200 201/* 202 * Vnode close call 203 */ 204int 205vn_close(vp, flags, cred, p) 206 register struct vnode *vp; 207 int flags; 208 struct ucred *cred; 209 struct proc *p; 210{ 211 int error; 212 213 if (flags & FWRITE) 214 vp->v_writecount--; 215 error = VOP_CLOSE(vp, flags, cred, p); 216 vn_vmio_close(vp); 217 return (error); 218} 219 220/* 221 * Package up an I/O request on a vnode into a uio and do it. 222 */ 223int 224vn_rdwr(rw, vp, base, len, offset, segflg, ioflg, cred, aresid, p) 225 enum uio_rw rw; 226 struct vnode *vp; 227 caddr_t base; 228 int len; 229 off_t offset; 230 enum uio_seg segflg; 231 int ioflg; 232 struct ucred *cred; 233 int *aresid; 234 struct proc *p; 235{ 236 struct uio auio; 237 struct iovec aiov; 238 int error; 239 240 if ((ioflg & IO_NODELOCKED) == 0) 241 VOP_LOCK(vp); 242 auio.uio_iov = &aiov; 243 auio.uio_iovcnt = 1; 244 aiov.iov_base = base; 245 aiov.iov_len = len; 246 auio.uio_resid = len; 247 auio.uio_offset = offset; 248 auio.uio_segflg = segflg; 249 auio.uio_rw = rw; 250 auio.uio_procp = p; 251 if (rw == UIO_READ) { 252 error = VOP_READ(vp, &auio, ioflg, cred); 253 } else { 254 error = VOP_WRITE(vp, &auio, ioflg, cred); 255 } 256 if (aresid) 257 *aresid = auio.uio_resid; 258 else 259 if (auio.uio_resid && error == 0) 260 error = EIO; 261 if ((ioflg & IO_NODELOCKED) == 0) 262 VOP_UNLOCK(vp); 263 return (error); 264} 265 266/* 267 * File table vnode read routine. 268 */
|
258int
| 269static int
|
259vn_read(fp, uio, cred) 260 struct file *fp; 261 struct uio *uio; 262 struct ucred *cred; 263{ 264 register struct vnode *vp = (struct vnode *)fp->f_data; 265 int count, error; 266 267 LEASE_CHECK(vp, uio->uio_procp, cred, LEASE_READ); 268 VOP_LOCK(vp); 269 uio->uio_offset = fp->f_offset; 270 count = uio->uio_resid; 271 error = VOP_READ(vp, uio, (fp->f_flag & FNONBLOCK) ? IO_NDELAY : 0, 272 cred); 273 fp->f_offset += count - uio->uio_resid; 274 VOP_UNLOCK(vp); 275 return (error); 276} 277 278/* 279 * File table vnode write routine. 280 */
| 270vn_read(fp, uio, cred) 271 struct file *fp; 272 struct uio *uio; 273 struct ucred *cred; 274{ 275 register struct vnode *vp = (struct vnode *)fp->f_data; 276 int count, error; 277 278 LEASE_CHECK(vp, uio->uio_procp, cred, LEASE_READ); 279 VOP_LOCK(vp); 280 uio->uio_offset = fp->f_offset; 281 count = uio->uio_resid; 282 error = VOP_READ(vp, uio, (fp->f_flag & FNONBLOCK) ? IO_NDELAY : 0, 283 cred); 284 fp->f_offset += count - uio->uio_resid; 285 VOP_UNLOCK(vp); 286 return (error); 287} 288 289/* 290 * File table vnode write routine. 291 */
|
281int
| 292static int
|
282vn_write(fp, uio, cred) 283 struct file *fp; 284 struct uio *uio; 285 struct ucred *cred; 286{ 287 register struct vnode *vp = (struct vnode *)fp->f_data; 288 int count, error, ioflag = 0; 289 290 if (vp->v_type == VREG && (fp->f_flag & O_APPEND)) 291 ioflag |= IO_APPEND; 292 if (fp->f_flag & FNONBLOCK) 293 ioflag |= IO_NDELAY; 294 LEASE_CHECK(vp, uio->uio_procp, cred, LEASE_WRITE); 295 VOP_LOCK(vp); 296 uio->uio_offset = fp->f_offset; 297 count = uio->uio_resid; 298 error = VOP_WRITE(vp, uio, ioflag, cred); 299 if (ioflag & IO_APPEND) 300 fp->f_offset = uio->uio_offset; 301 else 302 fp->f_offset += count - uio->uio_resid; 303 VOP_UNLOCK(vp); 304 return (error); 305} 306 307/* 308 * File table vnode stat routine. 309 */ 310int 311vn_stat(vp, sb, p) 312 struct vnode *vp; 313 register struct stat *sb; 314 struct proc *p; 315{ 316 struct vattr vattr; 317 register struct vattr *vap; 318 int error; 319 u_short mode; 320 321 vap = &vattr; 322 error = VOP_GETATTR(vp, vap, p->p_ucred, p); 323 if (error) 324 return (error); 325 /* 326 * Copy from vattr table 327 */ 328 sb->st_dev = vap->va_fsid; 329 sb->st_ino = vap->va_fileid; 330 mode = vap->va_mode; 331 switch (vp->v_type) { 332 case VREG: 333 mode |= S_IFREG; 334 break; 335 case VDIR: 336 mode |= S_IFDIR; 337 break; 338 case VBLK: 339 mode |= S_IFBLK; 340 break; 341 case VCHR: 342 mode |= S_IFCHR; 343 break; 344 case VLNK: 345 mode |= S_IFLNK; 346 break; 347 case VSOCK: 348 mode |= S_IFSOCK; 349 break; 350 case VFIFO: 351 mode |= S_IFIFO; 352 break; 353 default: 354 return (EBADF); 355 }; 356 sb->st_mode = mode; 357 sb->st_nlink = vap->va_nlink; 358 sb->st_uid = vap->va_uid; 359 sb->st_gid = vap->va_gid; 360 sb->st_rdev = vap->va_rdev; 361 sb->st_size = vap->va_size; 362 sb->st_atimespec = vap->va_atime; 363 sb->st_mtimespec= vap->va_mtime; 364 sb->st_ctimespec = vap->va_ctime; 365 sb->st_blksize = vap->va_blocksize; 366 sb->st_flags = vap->va_flags; 367 sb->st_gen = vap->va_gen; 368#if (S_BLKSIZE == 512) 369 /* Optimize this case */ 370 sb->st_blocks = vap->va_bytes >> 9; 371#else 372 sb->st_blocks = vap->va_bytes / S_BLKSIZE; 373#endif 374 return (0); 375} 376 377/* 378 * File table vnode ioctl routine. 379 */
| 293vn_write(fp, uio, cred) 294 struct file *fp; 295 struct uio *uio; 296 struct ucred *cred; 297{ 298 register struct vnode *vp = (struct vnode *)fp->f_data; 299 int count, error, ioflag = 0; 300 301 if (vp->v_type == VREG && (fp->f_flag & O_APPEND)) 302 ioflag |= IO_APPEND; 303 if (fp->f_flag & FNONBLOCK) 304 ioflag |= IO_NDELAY; 305 LEASE_CHECK(vp, uio->uio_procp, cred, LEASE_WRITE); 306 VOP_LOCK(vp); 307 uio->uio_offset = fp->f_offset; 308 count = uio->uio_resid; 309 error = VOP_WRITE(vp, uio, ioflag, cred); 310 if (ioflag & IO_APPEND) 311 fp->f_offset = uio->uio_offset; 312 else 313 fp->f_offset += count - uio->uio_resid; 314 VOP_UNLOCK(vp); 315 return (error); 316} 317 318/* 319 * File table vnode stat routine. 320 */ 321int 322vn_stat(vp, sb, p) 323 struct vnode *vp; 324 register struct stat *sb; 325 struct proc *p; 326{ 327 struct vattr vattr; 328 register struct vattr *vap; 329 int error; 330 u_short mode; 331 332 vap = &vattr; 333 error = VOP_GETATTR(vp, vap, p->p_ucred, p); 334 if (error) 335 return (error); 336 /* 337 * Copy from vattr table 338 */ 339 sb->st_dev = vap->va_fsid; 340 sb->st_ino = vap->va_fileid; 341 mode = vap->va_mode; 342 switch (vp->v_type) { 343 case VREG: 344 mode |= S_IFREG; 345 break; 346 case VDIR: 347 mode |= S_IFDIR; 348 break; 349 case VBLK: 350 mode |= S_IFBLK; 351 break; 352 case VCHR: 353 mode |= S_IFCHR; 354 break; 355 case VLNK: 356 mode |= S_IFLNK; 357 break; 358 case VSOCK: 359 mode |= S_IFSOCK; 360 break; 361 case VFIFO: 362 mode |= S_IFIFO; 363 break; 364 default: 365 return (EBADF); 366 }; 367 sb->st_mode = mode; 368 sb->st_nlink = vap->va_nlink; 369 sb->st_uid = vap->va_uid; 370 sb->st_gid = vap->va_gid; 371 sb->st_rdev = vap->va_rdev; 372 sb->st_size = vap->va_size; 373 sb->st_atimespec = vap->va_atime; 374 sb->st_mtimespec= vap->va_mtime; 375 sb->st_ctimespec = vap->va_ctime; 376 sb->st_blksize = vap->va_blocksize; 377 sb->st_flags = vap->va_flags; 378 sb->st_gen = vap->va_gen; 379#if (S_BLKSIZE == 512) 380 /* Optimize this case */ 381 sb->st_blocks = vap->va_bytes >> 9; 382#else 383 sb->st_blocks = vap->va_bytes / S_BLKSIZE; 384#endif 385 return (0); 386} 387 388/* 389 * File table vnode ioctl routine. 390 */
|
380int
| 391static int
|
381vn_ioctl(fp, com, data, p) 382 struct file *fp; 383 int com; 384 caddr_t data; 385 struct proc *p; 386{ 387 register struct vnode *vp = ((struct vnode *)fp->f_data); 388 struct vattr vattr; 389 int error; 390 391 switch (vp->v_type) { 392 393 case VREG: 394 case VDIR: 395 if (com == FIONREAD) { 396 error = VOP_GETATTR(vp, &vattr, p->p_ucred, p); 397 if (error) 398 return (error); 399 *(int *)data = vattr.va_size - fp->f_offset; 400 return (0); 401 } 402 if (com == FIONBIO || com == FIOASYNC) /* XXX */ 403 return (0); /* XXX */ 404 /* fall into ... */ 405 406 default: 407 return (ENOTTY); 408 409 case VFIFO: 410 case VCHR: 411 case VBLK: 412 error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p); 413 if (error == 0 && com == TIOCSCTTY) { 414 415 /* Do nothing if reassigning same control tty */ 416 if (p->p_session->s_ttyvp == vp) 417 return (0); 418 419 /* Get rid of reference to old control tty */ 420 if (p->p_session->s_ttyvp) 421 vrele(p->p_session->s_ttyvp); 422 423 p->p_session->s_ttyvp = vp; 424 VREF(vp); 425 } 426 return (error); 427 } 428} 429 430/* 431 * File table vnode select routine. 432 */
| 392vn_ioctl(fp, com, data, p) 393 struct file *fp; 394 int com; 395 caddr_t data; 396 struct proc *p; 397{ 398 register struct vnode *vp = ((struct vnode *)fp->f_data); 399 struct vattr vattr; 400 int error; 401 402 switch (vp->v_type) { 403 404 case VREG: 405 case VDIR: 406 if (com == FIONREAD) { 407 error = VOP_GETATTR(vp, &vattr, p->p_ucred, p); 408 if (error) 409 return (error); 410 *(int *)data = vattr.va_size - fp->f_offset; 411 return (0); 412 } 413 if (com == FIONBIO || com == FIOASYNC) /* XXX */ 414 return (0); /* XXX */ 415 /* fall into ... */ 416 417 default: 418 return (ENOTTY); 419 420 case VFIFO: 421 case VCHR: 422 case VBLK: 423 error = VOP_IOCTL(vp, com, data, fp->f_flag, p->p_ucred, p); 424 if (error == 0 && com == TIOCSCTTY) { 425 426 /* Do nothing if reassigning same control tty */ 427 if (p->p_session->s_ttyvp == vp) 428 return (0); 429 430 /* Get rid of reference to old control tty */ 431 if (p->p_session->s_ttyvp) 432 vrele(p->p_session->s_ttyvp); 433 434 p->p_session->s_ttyvp = vp; 435 VREF(vp); 436 } 437 return (error); 438 } 439} 440 441/* 442 * File table vnode select routine. 443 */
|
433int
| 444static int
|
434vn_select(fp, which, p) 435 struct file *fp; 436 int which; 437 struct proc *p; 438{ 439 440 return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag, 441 fp->f_cred, p)); 442} 443 444/* 445 * File table vnode close routine. 446 */
| 445vn_select(fp, which, p) 446 struct file *fp; 447 int which; 448 struct proc *p; 449{ 450 451 return (VOP_SELECT(((struct vnode *)fp->f_data), which, fp->f_flag, 452 fp->f_cred, p)); 453} 454 455/* 456 * File table vnode close routine. 457 */
|
447int
| 458static int
|
448vn_closefile(fp, p) 449 struct file *fp; 450 struct proc *p; 451{ 452 453 return (vn_close(((struct vnode *)fp->f_data), fp->f_flag, 454 fp->f_cred, p)); 455} 456
| 459vn_closefile(fp, p) 460 struct file *fp; 461 struct proc *p; 462{ 463 464 return (vn_close(((struct vnode *)fp->f_data), fp->f_flag, 465 fp->f_cred, p)); 466} 467
|
457int
| 468static int
|
458vn_vmio_open(vp, p, cred) 459 struct vnode *vp; 460 struct proc *p; 461 struct ucred *cred; 462{ 463 struct vattr vat; 464 int error; 465 /* 466 * this is here for VMIO support 467 */ 468 if (vp->v_type == VREG || vp->v_type == VBLK) { 469retry: 470 if ((vp->v_flag & VVMIO) == 0) { 471 if ((error = VOP_GETATTR(vp, &vat, cred, p)) != 0) 472 return error; 473 (void) vnode_pager_alloc(vp, vat.va_size, 0, 0); 474 vp->v_flag |= VVMIO; 475 } else { 476 vm_object_t object; 477 if ((object = vp->v_object) && 478 (object->flags & OBJ_DEAD)) { 479 VOP_UNLOCK(vp); 480 tsleep(object, PVM, "vodead", 0); 481 VOP_LOCK(vp); 482 goto retry; 483 } 484 if (!object) 485 panic("vn_open: VMIO object missing"); 486 vm_object_reference(object); 487 } 488 } 489 return 0; 490} 491 492void 493vn_vmio_close(vp) 494 struct vnode *vp; 495{ 496 /* 497 * this code is here for VMIO support, will eventually 498 * be in vfs code. 499 */ 500 if (vp->v_flag & VVMIO) { 501 vrele(vp); 502 if (vp->v_object == NULL) 503 panic("vn_close: VMIO object missing"); 504 vm_object_deallocate(vp->v_object); 505 } else 506 vrele(vp); 507}
| 469vn_vmio_open(vp, p, cred) 470 struct vnode *vp; 471 struct proc *p; 472 struct ucred *cred; 473{ 474 struct vattr vat; 475 int error; 476 /* 477 * this is here for VMIO support 478 */ 479 if (vp->v_type == VREG || vp->v_type == VBLK) { 480retry: 481 if ((vp->v_flag & VVMIO) == 0) { 482 if ((error = VOP_GETATTR(vp, &vat, cred, p)) != 0) 483 return error; 484 (void) vnode_pager_alloc(vp, vat.va_size, 0, 0); 485 vp->v_flag |= VVMIO; 486 } else { 487 vm_object_t object; 488 if ((object = vp->v_object) && 489 (object->flags & OBJ_DEAD)) { 490 VOP_UNLOCK(vp); 491 tsleep(object, PVM, "vodead", 0); 492 VOP_LOCK(vp); 493 goto retry; 494 } 495 if (!object) 496 panic("vn_open: VMIO object missing"); 497 vm_object_reference(object); 498 } 499 } 500 return 0; 501} 502 503void 504vn_vmio_close(vp) 505 struct vnode *vp; 506{ 507 /* 508 * this code is here for VMIO support, will eventually 509 * be in vfs code. 510 */ 511 if (vp->v_flag & VVMIO) { 512 vrele(vp); 513 if (vp->v_object == NULL) 514 panic("vn_close: VMIO object missing"); 515 vm_object_deallocate(vp->v_object); 516 } else 517 vrele(vp); 518}
|