bsd/ufs/ffs/ffs_vnops.c

   1 /*
   2  * Copyright (c) 2000-2002 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) 1982, 1986, 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95
  56  */
  57
  58 #include <rev_endian_fs.h>
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/resourcevar.h>
  62 #include <sys/kernel.h>
  63 #include <sys/file.h>
  64 #include <sys/stat.h>
  65 #include <sys/proc.h>
  66 #include <sys/conf.h>
  67 #include <sys/mount_internal.h>
  68 #include <sys/vnode_internal.h>
  69 #include <sys/malloc.h>
  70 #include <sys/ubc.h>
  71 #include <sys/quota.h>
  72
  73 #include <sys/vm.h>
  74 #include <vfs/vfs_support.h>
  75
  76 #include <miscfs/specfs/specdev.h>
  77 #include <miscfs/fifofs/fifo.h>
  78
  79 #include <ufs/ufs/quota.h>
  80 #include <ufs/ufs/inode.h>
  81 #include <ufs/ufs/dir.h>
  82 #include <ufs/ufs/ufsmount.h>
  83 #include <ufs/ufs/ufs_extern.h>
  84
  85 #include <ufs/ffs/fs.h>
  86 #include <ufs/ffs/ffs_extern.h>
  87 #if REV_ENDIAN_FS
  88 #include <ufs/ufs/ufs_byte_order.h>
  89 #include <architecture/byte_order.h>
  90 #endif /* REV_ENDIAN_FS */
  91
  92 #define VOPFUNC int (*)(void *)
  93
  94 /* Global vfs data structures for ufs. */
  95 int (**ffs_vnodeop_p)(void *);
  96 struct vnodeopv_entry_desc ffs_vnodeop_entries[] = {
  97         { &vnop_default_desc, (VOPFUNC)vn_default_error },
  98         { &vnop_lookup_desc, (VOPFUNC)ufs_lookup },             /* lookup */
  99         { &vnop_create_desc, (VOPFUNC)ufs_create },             /* create */
 100         { &vnop_whiteout_desc, (VOPFUNC)ufs_whiteout },         /* whiteout */
 101         { &vnop_mknod_desc, (VOPFUNC)ufs_mknod },               /* mknod */
 102         { &vnop_open_desc, (VOPFUNC)ufs_open },                 /* open */
 103         { &vnop_close_desc, (VOPFUNC)ufs_close },               /* close */
 104         { &vnop_getattr_desc, (VOPFUNC)ufs_getattr },           /* getattr */
 105         { &vnop_setattr_desc, (VOPFUNC)ufs_setattr },           /* setattr */
 106         { &vnop_read_desc, (VOPFUNC)ffs_read },                 /* read */
 107         { &vnop_write_desc, (VOPFUNC)ffs_write },               /* write */
 108         { &vnop_ioctl_desc, (VOPFUNC)ufs_ioctl },               /* ioctl */
 109         { &vnop_select_desc, (VOPFUNC)ufs_select },             /* select */
 110         { &vnop_revoke_desc, (VOPFUNC)ufs_revoke },             /* revoke */
 111         { &vnop_mmap_desc, (VOPFUNC)ufs_mmap },                 /* mmap */
 112         { &vnop_fsync_desc, (VOPFUNC)ffs_fsync },               /* fsync */
 113         { &vnop_remove_desc, (VOPFUNC)ufs_remove },             /* remove */
 114         { &vnop_link_desc, (VOPFUNC)ufs_link },                 /* link */
 115         { &vnop_rename_desc, (VOPFUNC)ufs_rename },             /* rename */
 116         { &vnop_mkdir_desc, (VOPFUNC)ufs_mkdir },               /* mkdir */
 117         { &vnop_rmdir_desc, (VOPFUNC)ufs_rmdir },               /* rmdir */
 118         { &vnop_symlink_desc, (VOPFUNC)ufs_symlink },           /* symlink */
 119         { &vnop_readdir_desc, (VOPFUNC)ufs_readdir },           /* readdir */
 120         { &vnop_readlink_desc, (VOPFUNC)ufs_readlink },         /* readlink */
 121         { &vnop_inactive_desc, (VOPFUNC)ufs_inactive },         /* inactive */
 122         { &vnop_reclaim_desc, (VOPFUNC)ffs_reclaim },           /* reclaim */
 123         { &vnop_strategy_desc, (VOPFUNC)ufs_strategy },         /* strategy */
 124         { &vnop_pathconf_desc, (VOPFUNC)ufs_pathconf },         /* pathconf */
 125         { &vnop_advlock_desc, (VOPFUNC)err_advlock },           /* advlock */
 126         { &vnop_bwrite_desc, (VOPFUNC)vn_bwrite },
 127         { &vnop_pagein_desc, (VOPFUNC)ffs_pagein },             /* Pagein */
 128         { &vnop_pageout_desc, (VOPFUNC)ffs_pageout },           /* Pageout */
 129         { &vnop_copyfile_desc, (VOPFUNC)err_copyfile },         /* Copy File */
 130         { &vnop_blktooff_desc, (VOPFUNC)ffs_blktooff },         /* blktooff */
 131         { &vnop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },         /* offtoblk */
 132         { &vnop_blockmap_desc, (VOPFUNC)ufs_blockmap },         /* blockmap */
 133         { &vnop_kqfilt_add_desc, (VOPFUNC)ufs_kqfilt_add },  /* kqfilt_add */
 134         { (struct vnodeop_desc*)NULL, (int(*)())NULL }
 135 };
 136 struct vnodeopv_desc ffs_vnodeop_opv_desc =
 137         { &ffs_vnodeop_p, ffs_vnodeop_entries };
 138
 139 int (**ffs_specop_p)(void *);
 140 struct vnodeopv_entry_desc ffs_specop_entries[] = {
 141         { &vnop_default_desc, (VOPFUNC)vn_default_error },
 142         { &vnop_lookup_desc, (VOPFUNC)spec_lookup },            /* lookup */
 143         { &vnop_create_desc, (VOPFUNC)spec_create },            /* create */
 144         { &vnop_mknod_desc, (VOPFUNC)spec_mknod },              /* mknod */
 145         { &vnop_open_desc, (VOPFUNC)spec_open },                        /* open */
 146         { &vnop_close_desc, (VOPFUNC)ufsspec_close },           /* close */
 147         { &vnop_getattr_desc, (VOPFUNC)ufs_getattr },           /* getattr */
 148         { &vnop_setattr_desc, (VOPFUNC)ufs_setattr },           /* setattr */
 149         { &vnop_read_desc, (VOPFUNC)ufsspec_read },             /* read */
 150         { &vnop_write_desc, (VOPFUNC)ufsspec_write },           /* write */
 151         { &vnop_ioctl_desc, (VOPFUNC)spec_ioctl },              /* ioctl */
 152         { &vnop_select_desc, (VOPFUNC)spec_select },            /* select */
 153         { &vnop_revoke_desc, (VOPFUNC)spec_revoke },            /* revoke */
 154         { &vnop_mmap_desc, (VOPFUNC)spec_mmap },                        /* mmap */
 155         { &vnop_fsync_desc, (VOPFUNC)ffs_fsync },               /* fsync */
 156         { &vnop_remove_desc, (VOPFUNC)spec_remove },            /* remove */
 157         { &vnop_link_desc, (VOPFUNC)spec_link },                        /* link */
 158         { &vnop_rename_desc, (VOPFUNC)spec_rename },            /* rename */
 159         { &vnop_mkdir_desc, (VOPFUNC)spec_mkdir },              /* mkdir */
 160         { &vnop_rmdir_desc, (VOPFUNC)spec_rmdir },              /* rmdir */
 161         { &vnop_symlink_desc, (VOPFUNC)spec_symlink },          /* symlink */
 162         { &vnop_readdir_desc, (VOPFUNC)spec_readdir },          /* readdir */
 163         { &vnop_readlink_desc, (VOPFUNC)spec_readlink },                /* readlink */
 164         { &vnop_inactive_desc, (VOPFUNC)ufs_inactive },         /* inactive */
 165         { &vnop_reclaim_desc, (VOPFUNC)ffs_reclaim },           /* reclaim */
 166         { &vnop_strategy_desc, (VOPFUNC)spec_strategy },                /* strategy */
 167         { &vnop_pathconf_desc, (VOPFUNC)spec_pathconf },                /* pathconf */
 168         { &vnop_advlock_desc, (VOPFUNC)err_advlock },           /* advlock */
 169         { &vnop_bwrite_desc, (VOPFUNC)vn_bwrite },
 170         { &vnop_devblocksize_desc, (VOPFUNC)spec_devblocksize },        /* devblocksize */
 171         { &vnop_pagein_desc, (VOPFUNC)ffs_pagein },             /* Pagein */
 172         { &vnop_pageout_desc, (VOPFUNC)ffs_pageout },           /* Pageout */
 173         { &vnop_copyfile_desc, (VOPFUNC)err_copyfile },         /* Copy File */
 174         { &vnop_blktooff_desc, (VOPFUNC)ffs_blktooff },         /* blktooff */
 175         { &vnop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },         /* offtoblk */
 176         { &vnop_blockmap_desc, (VOPFUNC)spec_blockmap },        /* blockmap */
 177         { (struct vnodeop_desc*)NULL, (int(*)())NULL }
 178 };
 179 struct vnodeopv_desc ffs_specop_opv_desc =
 180         { &ffs_specop_p, ffs_specop_entries };
 181
 182 #if FIFO
 183 int (**ffs_fifoop_p)(void *);
 184 struct vnodeopv_entry_desc ffs_fifoop_entries[] = {
 185         { &vnop_default_desc, (VOPFUNC)vn_default_error },
 186         { &vnop_lookup_desc, (VOPFUNC)fifo_lookup },            /* lookup */
 187         { &vnop_create_desc, (VOPFUNC)fifo_create },            /* create */
 188         { &vnop_mknod_desc, (VOPFUNC)fifo_mknod },              /* mknod */
 189         { &vnop_open_desc, (VOPFUNC)fifo_open },                        /* open */
 190         { &vnop_close_desc, (VOPFUNC)ufsfifo_close },           /* close */
 191         { &vnop_getattr_desc, (VOPFUNC)ufs_getattr },           /* getattr */
 192         { &vnop_setattr_desc, (VOPFUNC)ufs_setattr },           /* setattr */
 193         { &vnop_read_desc, (VOPFUNC)ufsfifo_read },             /* read */
 194         { &vnop_write_desc, (VOPFUNC)ufsfifo_write },           /* write */
 195         { &vnop_ioctl_desc, (VOPFUNC)fifo_ioctl },              /* ioctl */
 196         { &vnop_select_desc, (VOPFUNC)fifo_select },            /* select */
 197         { &vnop_revoke_desc, (VOPFUNC)fifo_revoke },            /* revoke */
 198         { &vnop_mmap_desc, (VOPFUNC)fifo_mmap },                        /* mmap */
 199         { &vnop_fsync_desc, (VOPFUNC)ffs_fsync },               /* fsync */
 200         { &vnop_remove_desc, (VOPFUNC)fifo_remove },            /* remove */
 201         { &vnop_link_desc, (VOPFUNC)fifo_link },                        /* link */
 202         { &vnop_rename_desc, (VOPFUNC)fifo_rename },            /* rename */
 203         { &vnop_mkdir_desc, (VOPFUNC)fifo_mkdir },              /* mkdir */
 204         { &vnop_rmdir_desc, (VOPFUNC)fifo_rmdir },              /* rmdir */
 205         { &vnop_symlink_desc, (VOPFUNC)fifo_symlink },          /* symlink */
 206         { &vnop_readdir_desc, (VOPFUNC)fifo_readdir },          /* readdir */
 207         { &vnop_readlink_desc, (VOPFUNC)fifo_readlink },                /* readlink */
 208         { &vnop_inactive_desc, (VOPFUNC)ufs_inactive },         /* inactive */
 209         { &vnop_reclaim_desc, (VOPFUNC)ffs_reclaim },           /* reclaim */
 210         { &vnop_strategy_desc, (VOPFUNC)fifo_strategy },                /* strategy */
 211         { &vnop_pathconf_desc, (VOPFUNC)fifo_pathconf },                /* pathconf */
 212         { &vnop_advlock_desc, (VOPFUNC)err_advlock },           /* advlock */
 213         { &vnop_bwrite_desc, (VOPFUNC)vn_bwrite },
 214         { &vnop_pagein_desc, (VOPFUNC)ffs_pagein },             /* Pagein */
 215         { &vnop_pageout_desc, (VOPFUNC)ffs_pageout },           /* Pageout */
 216         { &vnop_copyfile_desc, (VOPFUNC)err_copyfile },         /*  Copy File */
 217         { &vnop_blktooff_desc, (VOPFUNC)ffs_blktooff },         /* blktooff */
 218         { &vnop_offtoblk_desc, (VOPFUNC)ffs_offtoblk },         /* offtoblk */
 219         { &vnop_blockmap_desc, (VOPFUNC)ufs_blockmap },         /* blockmap */
 220         { &vnop_kqfilt_add_desc, (VOPFUNC)ufsfifo_kqfilt_add },  /* kqfilt_add */
 221         { (struct vnodeop_desc*)NULL, (int(*)())NULL }
 222 };
 223 struct vnodeopv_desc ffs_fifoop_opv_desc =
 224         { &ffs_fifoop_p, ffs_fifoop_entries };
 225 #endif /* FIFO */
 226
 227 /*
 228  * Enabling cluster read/write operations.
 229  */
 230 int doclusterread = 0;
 231 int doclusterwrite = 0;
 232
 233 #include <ufs/ufs/ufs_readwrite.c>
 234
 235 /*
 236  * Synch an open file.
 237  */
 238 /* ARGSUSED */
 239 int
 240 ffs_fsync(ap)
 241         struct vnop_fsync_args /* {
 242                 struct vnode *a_vp;
 243                 int a_waitfor;
 244                 vfs_context_t a_context;
 245         } */ *ap;
 246 {
 247         return(ffs_fsync_internal(ap->a_vp, ap->a_waitfor));
 248 }
 249
 250
 251 int
 252 ffs_fsync_internal(vnode_t vp, int waitfor)
 253 {
 254         struct timeval tv;
 255         int wait = (waitfor == MNT_WAIT);
 256
 257         /*
 258          * Write out any clusters.
 259          */
 260         cluster_push(vp, 0);
 261
 262         /*
 263          * Flush all dirty buffers associated with a vnode.
 264          */
 265         buf_flushdirtyblks(vp, wait, 0, (char *)"ffs_fsync");
 266         microtime(&tv);
 267
 268         return (ffs_update(vp, &tv, &tv, wait));
 269 }
 270
 271 /*
 272  * Reclaim an inode so that it can be used for other purposes.
 273  */
 274 int
 275 ffs_reclaim(ap)
 276         struct vnop_reclaim_args /* {
 277                 struct vnode *a_vp;
 278                 vfs_context_t a_context;
 279         } */ *ap;
 280 {
 281         register struct vnode *vp = ap->a_vp;
 282         int error;
 283
 284         if ( (error = ufs_reclaim(vp, vfs_context_proc(ap->a_context))) )
 285                 return (error);
 286
 287         FREE_ZONE(vnode_fsnode(vp), sizeof (struct inode), M_FFSNODE);
 288
 289         vnode_clearfsnode(vp);
 290
 291         return (0);
 292 }
 293
 294 /* Blktooff converts a logical block number to a file offset */
 295 int
 296 ffs_blktooff(ap)
 297         struct vnop_blktooff_args /* {
 298                 struct vnode *a_vp;
 299                 daddr64_t a_lblkno;
 300                 off_t *a_offset;
 301         } */ *ap;
 302 {
 303         register struct inode *ip;
 304         register FS *fs;
 305
 306         if (ap->a_vp == NULL)
 307                 return (EINVAL);
 308
 309         fs = VTOI(ap->a_vp)->I_FS;
 310
 311         *ap->a_offset = (off_t)lblktosize(fs, ap->a_lblkno);
 312
 313         return (0);
 314 }
 315
 316 /* Blktooff converts a logical block number to a file offset */
 317 int
 318 ffs_offtoblk(ap)
 319         struct vnop_offtoblk_args /* {
 320                 struct vnode *a_vp;
 321                 off_t a_offset;
 322                 daddr64_t *a_lblkno;
 323         } */ *ap;
 324 {
 325         register FS *fs;
 326
 327         if (ap->a_vp == NULL)
 328                 return (EINVAL);
 329
 330         fs = VTOI(ap->a_vp)->I_FS;
 331
 332         *ap->a_lblkno = (daddr64_t)lblkno(fs, ap->a_offset);
 333
 334         return (0);
 335 }