1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)ffs_vnops.c 8.15 (Berkeley) 5/14/95 34 * $Id: ffs_vnops.c,v 1.23 1997/02/22 09:47:09 peter Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/resourcevar.h> 40 #include <sys/signalvar.h> 41 #include <sys/kernel.h> 42 #include <sys/file.h> 43 #include <sys/stat.h> 44 #include <sys/buf.h> 45 #include <sys/proc.h> 46 #include <sys/conf.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 #include <sys/malloc.h> 50 #include <sys/lockf.h> 51 52 #include <vm/vm.h> 53 #include <vm/vm_param.h> 54 #include <vm/vm_prot.h> 55 #include <vm/vm_page.h> 56 #include <vm/vm_object.h> 57 #include <vm/vm_extern.h> 58 59 #include <miscfs/specfs/specdev.h> 60 #include <miscfs/fifofs/fifo.h> 61 62 #include <ufs/ufs/quota.h> 63 #include <ufs/ufs/inode.h> 64 #include <ufs/ufs/dir.h> 65 #include <ufs/ufs/ufsmount.h> 66 #include <ufs/ufs/ufs_extern.h> 67 68 #include <ufs/ffs/fs.h> 69 #include <ufs/ffs/ffs_extern.h> 70 71 static int ffs_fsync __P((struct vop_fsync_args *)); 72 static int ffs_getpages __P((struct vop_getpages_args *)); 73 static int ffs_read __P((struct vop_read_args *)); 74 static int ffs_write __P((struct vop_write_args *)); 75 76 /* Global vfs data structures for ufs. */ 77 vop_t **ffs_vnodeop_p; 78 static struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 79 { &vop_default_desc, (vop_t *)vn_default_error }, 80 { &vop_lookup_desc, (vop_t *)ufs_lookup }, /* lookup */ 81 { &vop_create_desc, (vop_t *)ufs_create }, /* create */ 82 { &vop_whiteout_desc, (vop_t *)ufs_whiteout }, /* whiteout */ 83 { &vop_mknod_desc, (vop_t *)ufs_mknod }, /* mknod */ 84 { &vop_open_desc, (vop_t *)ufs_open }, /* open */ 85 { &vop_close_desc, (vop_t *)ufs_close }, /* close */ 86 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 87 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 88 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 89 { &vop_read_desc, (vop_t *)ffs_read }, /* read */ 90 { &vop_write_desc, (vop_t *)ffs_write }, /* write */ 91 { &vop_lease_desc, (vop_t *)ufs_lease_check }, /* lease */ 92 { &vop_ioctl_desc, (vop_t *)ufs_ioctl }, /* ioctl */ 93 { &vop_select_desc, (vop_t *)ufs_select }, /* select */ 94 { &vop_revoke_desc, (vop_t *)ufs_revoke }, /* revoke */ 95 { &vop_mmap_desc, (vop_t *)ufs_mmap }, /* mmap */ 96 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 97 { &vop_seek_desc, (vop_t *)ufs_seek }, /* seek */ 98 { &vop_remove_desc, (vop_t *)ufs_remove }, /* remove */ 99 { &vop_link_desc, (vop_t *)ufs_link }, /* link */ 100 { &vop_rename_desc, (vop_t *)ufs_rename }, /* rename */ 101 { &vop_mkdir_desc, (vop_t *)ufs_mkdir }, /* mkdir */ 102 { &vop_rmdir_desc, (vop_t *)ufs_rmdir }, /* rmdir */ 103 { &vop_symlink_desc, (vop_t *)ufs_symlink }, /* symlink */ 104 { &vop_readdir_desc, (vop_t *)ufs_readdir }, /* readdir */ 105 { &vop_readlink_desc, (vop_t *)ufs_readlink }, /* readlink */ 106 { &vop_abortop_desc, (vop_t *)ufs_abortop }, /* abortop */ 107 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 108 { &vop_reclaim_desc, (vop_t *)ffs_reclaim }, /* reclaim */ 109 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 110 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 111 { &vop_bmap_desc, (vop_t *)ufs_bmap }, /* bmap */ 112 { &vop_strategy_desc, (vop_t *)ufs_strategy }, /* strategy */ 113 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 114 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 115 { &vop_pathconf_desc, (vop_t *)ufs_pathconf }, /* pathconf */ 116 { &vop_advlock_desc, (vop_t *)ufs_advlock }, /* advlock */ 117 { &vop_blkatoff_desc, (vop_t *)ffs_blkatoff }, /* blkatoff */ 118 { &vop_valloc_desc, (vop_t *)ffs_valloc }, /* valloc */ 119 { &vop_reallocblks_desc, (vop_t *)ffs_reallocblks }, /* reallocblks */ 120 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 121 { &vop_truncate_desc, (vop_t *)ffs_truncate }, /* truncate */ 122 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 123 { &vop_getpages_desc, (vop_t *)ffs_getpages}, /* getpages */ 124 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 125 { NULL, NULL } 126 }; 127 static struct vnodeopv_desc ffs_vnodeop_opv_desc = 128 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 129 130 vop_t **ffs_specop_p; 131 static struct vnodeopv_entry_desc ffs_specop_entries[] = { 132 { &vop_default_desc, (vop_t *)vn_default_error }, 133 { &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */ 134 { &vop_create_desc, (vop_t *)spec_create }, /* create */ 135 { &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */ 136 { &vop_open_desc, (vop_t *)spec_open }, /* open */ 137 { &vop_close_desc, (vop_t *)ufsspec_close }, /* close */ 138 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 139 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 140 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 141 { &vop_read_desc, (vop_t *)ufsspec_read }, /* read */ 142 { &vop_write_desc, (vop_t *)ufsspec_write }, /* write */ 143 { &vop_lease_desc, (vop_t *)spec_lease_check }, /* lease */ 144 { &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */ 145 { &vop_select_desc, (vop_t *)spec_select }, /* select */ 146 { &vop_revoke_desc, (vop_t *)spec_revoke }, /* revoke */ 147 { &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */ 148 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 149 { &vop_seek_desc, (vop_t *)spec_seek }, /* seek */ 150 { &vop_remove_desc, (vop_t *)spec_remove }, /* remove */ 151 { &vop_link_desc, (vop_t *)spec_link }, /* link */ 152 { &vop_rename_desc, (vop_t *)spec_rename }, /* rename */ 153 { &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */ 154 { &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */ 155 { &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */ 156 { &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */ 157 { &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */ 158 { &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */ 159 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 160 { &vop_reclaim_desc, (vop_t *)ffs_reclaim }, /* reclaim */ 161 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 162 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 163 { &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */ 164 { &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */ 165 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 166 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 167 { &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */ 168 { &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */ 169 { &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */ 170 { &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */ 171 { &vop_reallocblks_desc, (vop_t *)spec_reallocblks }, /* reallocblks */ 172 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 173 { &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */ 174 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 175 { &vop_getpages_desc, (vop_t *)spec_getpages}, /* getpages */ 176 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 177 { NULL, NULL } 178 }; 179 static struct vnodeopv_desc ffs_specop_opv_desc = 180 { &ffs_specop_p, ffs_specop_entries }; 181 182 vop_t **ffs_fifoop_p; 183 static struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 184 { &vop_default_desc, (vop_t *)vn_default_error }, 185 { &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */ 186 { &vop_create_desc, (vop_t *)fifo_create }, /* create */ 187 { &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */ 188 { &vop_open_desc, (vop_t *)fifo_open }, /* open */ 189 { &vop_close_desc, (vop_t *)ufsfifo_close }, /* close */ 190 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 191 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 192 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 193 { &vop_read_desc, (vop_t *)ufsfifo_read }, /* read */ 194 { &vop_write_desc, (vop_t *)ufsfifo_write }, /* write */ 195 { &vop_lease_desc, (vop_t *)fifo_lease_check }, /* lease */ 196 { &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */ 197 { &vop_select_desc, (vop_t *)fifo_select }, /* select */ 198 { &vop_revoke_desc, (vop_t *)fifo_revoke }, /* revoke */ 199 { &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */ 200 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 201 { &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */ 202 { &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */ 203 { &vop_link_desc, (vop_t *)fifo_link }, /* link */ 204 { &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */ 205 { &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */ 206 { &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */ 207 { &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */ 208 { &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */ 209 { &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */ 210 { &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */ 211 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 212 { &vop_reclaim_desc, (vop_t *)ffs_reclaim }, /* reclaim */ 213 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 214 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 215 { &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */ 216 { &vop_strategy_desc, (vop_t *)fifo_strategy }, /* strategy */ 217 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 218 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 219 { &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */ 220 { &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */ 221 { &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */ 222 { &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */ 223 { &vop_reallocblks_desc, (vop_t *)fifo_reallocblks }, /* reallocblks */ 224 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 225 { &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */ 226 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 227 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 228 { NULL, NULL } 229 }; 230 static struct vnodeopv_desc ffs_fifoop_opv_desc = 231 { &ffs_fifoop_p, ffs_fifoop_entries }; 232 233 VNODEOP_SET(ffs_vnodeop_opv_desc); 234 VNODEOP_SET(ffs_specop_opv_desc); 235 VNODEOP_SET(ffs_fifoop_opv_desc); 236 237 /* 238 * Enabling cluster read/write operations. 239 */ 240 int doclusterread = 1; 241 int doclusterwrite = 1; 242 243 #include <sys/sysctl.h> 244 SYSCTL_NODE(_vfs, MOUNT_UFS, ffs, CTLFLAG_RW, 0, "FFS filesystem"); 245 SYSCTL_INT(_vfs_ffs, FFS_CLUSTERREAD, doclusterread, CTLFLAG_RW, &doclusterread, 0, ""); 246 SYSCTL_INT(_vfs_ffs, FFS_CLUSTERWRITE, doclusterwrite, CTLFLAG_RW, &doclusterwrite, 0, ""); 247 248 #include <ufs/ufs/ufs_readwrite.c> 249 250 /* 251 * Synch an open file. 252 */ 253 /* ARGSUSED */ 254 static int 255 ffs_fsync(ap) 256 struct vop_fsync_args /* { 257 struct vnode *a_vp; 258 struct ucred *a_cred; 259 int a_waitfor; 260 struct proc *a_p; 261 } */ *ap; 262 { 263 register struct vnode *vp = ap->a_vp; 264 register struct buf *bp; 265 struct timeval tv; 266 struct buf *nbp; 267 int pass; 268 int s; 269 270 pass = 0; 271 /* 272 * Flush all dirty buffers associated with a vnode. 273 */ 274 loop: 275 s = splbio(); 276 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 277 nbp = bp->b_vnbufs.le_next; 278 if ((bp->b_flags & B_BUSY) || (pass == 0 && (bp->b_blkno < 0))) 279 continue; 280 if ((bp->b_flags & B_DELWRI) == 0) 281 panic("ffs_fsync: not dirty"); 282 283 if (bp->b_vp != vp || ap->a_waitfor != MNT_NOWAIT) { 284 285 bremfree(bp); 286 bp->b_flags |= B_BUSY; 287 splx(s); 288 /* 289 * Wait for I/O associated with indirect blocks to complete, 290 * since there is no way to quickly wait for them below. 291 */ 292 if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT) 293 (void) bawrite(bp); 294 else 295 (void) bwrite(bp); 296 } else { 297 vfs_bio_awrite(bp); 298 splx(s); 299 } 300 goto loop; 301 } 302 splx(s); 303 304 if (pass == 0) { 305 pass = 1; 306 goto loop; 307 } 308 309 if (ap->a_waitfor == MNT_WAIT) { 310 s = splbio(); 311 while (vp->v_numoutput) { 312 vp->v_flag |= VBWAIT; 313 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffsfsn", 0); 314 } 315 splx(s); 316 #ifdef DIAGNOSTIC 317 if (vp->v_dirtyblkhd.lh_first) { 318 vprint("ffs_fsync: dirty", vp); 319 goto loop; 320 } 321 #endif 322 } 323 324 tv = time; 325 return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT)); 326 } 327 328 /* 329 * Reclaim an inode so that it can be used for other purposes. 330 */ 331 int 332 ffs_reclaim(ap) 333 struct vop_reclaim_args /* { 334 struct vnode *a_vp; 335 struct proc *a_p; 336 } */ *ap; 337 { 338 register struct vnode *vp = ap->a_vp; 339 int error; 340 341 if (error = ufs_reclaim(vp, ap->a_p)) 342 return (error); 343 FREE(vp->v_data, VFSTOUFS(vp->v_mount)->um_devvp->v_tag == VT_MFS ? 344 M_MFSNODE : M_FFSNODE); 345 vp->v_data = NULL; 346 return (0); 347 } 348