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 8.7 (Berkeley) 2/3/94 34 * $Id: ffs_vnops.c,v 1.9 1995/04/09 06:03:40 davidg 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_page.h> 54 #include <vm/vm_object.h> 55 56 #include <miscfs/specfs/specdev.h> 57 #include <miscfs/fifofs/fifo.h> 58 59 #include <ufs/ufs/quota.h> 60 #include <ufs/ufs/inode.h> 61 #include <ufs/ufs/dir.h> 62 #include <ufs/ufs/ufs_extern.h> 63 64 #include <ufs/ffs/fs.h> 65 #include <ufs/ffs/ffs_extern.h> 66 67 /* Global vfs data structures for ufs. */ 68 int (**ffs_vnodeop_p)(); 69 struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 70 { &vop_default_desc, vn_default_error }, 71 { &vop_lookup_desc, ufs_lookup }, /* lookup */ 72 { &vop_create_desc, ufs_create }, /* create */ 73 { &vop_mknod_desc, ufs_mknod }, /* mknod */ 74 { &vop_open_desc, ufs_open }, /* open */ 75 { &vop_close_desc, ufs_close }, /* close */ 76 { &vop_access_desc, ufs_access }, /* access */ 77 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 78 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 79 { &vop_read_desc, ffs_read }, /* read */ 80 { &vop_write_desc, ffs_write }, /* write */ 81 { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */ 82 { &vop_select_desc, ufs_select }, /* select */ 83 { &vop_mmap_desc, ufs_mmap }, /* mmap */ 84 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 85 { &vop_seek_desc, ufs_seek }, /* seek */ 86 { &vop_remove_desc, ufs_remove }, /* remove */ 87 { &vop_link_desc, ufs_link }, /* link */ 88 { &vop_rename_desc, ufs_rename }, /* rename */ 89 { &vop_mkdir_desc, ufs_mkdir }, /* mkdir */ 90 { &vop_rmdir_desc, ufs_rmdir }, /* rmdir */ 91 { &vop_symlink_desc, ufs_symlink }, /* symlink */ 92 { &vop_readdir_desc, ufs_readdir }, /* readdir */ 93 { &vop_readlink_desc, ufs_readlink }, /* readlink */ 94 { &vop_abortop_desc, ufs_abortop }, /* abortop */ 95 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 96 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 97 { &vop_lock_desc, ufs_lock }, /* lock */ 98 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 99 { &vop_bmap_desc, ufs_bmap }, /* bmap */ 100 { &vop_strategy_desc, ufs_strategy }, /* strategy */ 101 { &vop_print_desc, ufs_print }, /* print */ 102 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 103 { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */ 104 { &vop_advlock_desc, ufs_advlock }, /* advlock */ 105 { &vop_blkatoff_desc, ffs_blkatoff }, /* blkatoff */ 106 { &vop_valloc_desc, ffs_valloc }, /* valloc */ 107 { &vop_reallocblks_desc, ffs_reallocblks }, /* reallocblks */ 108 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 109 { &vop_truncate_desc, ffs_truncate }, /* truncate */ 110 { &vop_update_desc, ffs_update }, /* update */ 111 { &vop_bwrite_desc, vn_bwrite }, 112 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 113 }; 114 struct vnodeopv_desc ffs_vnodeop_opv_desc = 115 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 116 117 int (**ffs_specop_p)(); 118 struct vnodeopv_entry_desc ffs_specop_entries[] = { 119 { &vop_default_desc, vn_default_error }, 120 { &vop_lookup_desc, spec_lookup }, /* lookup */ 121 { &vop_create_desc, spec_create }, /* create */ 122 { &vop_mknod_desc, spec_mknod }, /* mknod */ 123 { &vop_open_desc, spec_open }, /* open */ 124 { &vop_close_desc, ufsspec_close }, /* close */ 125 { &vop_access_desc, ufs_access }, /* access */ 126 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 127 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 128 { &vop_read_desc, ufsspec_read }, /* read */ 129 { &vop_write_desc, ufsspec_write }, /* write */ 130 { &vop_ioctl_desc, spec_ioctl }, /* ioctl */ 131 { &vop_select_desc, spec_select }, /* select */ 132 { &vop_mmap_desc, spec_mmap }, /* mmap */ 133 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 134 { &vop_seek_desc, spec_seek }, /* seek */ 135 { &vop_remove_desc, spec_remove }, /* remove */ 136 { &vop_link_desc, spec_link }, /* link */ 137 { &vop_rename_desc, spec_rename }, /* rename */ 138 { &vop_mkdir_desc, spec_mkdir }, /* mkdir */ 139 { &vop_rmdir_desc, spec_rmdir }, /* rmdir */ 140 { &vop_symlink_desc, spec_symlink }, /* symlink */ 141 { &vop_readdir_desc, spec_readdir }, /* readdir */ 142 { &vop_readlink_desc, spec_readlink }, /* readlink */ 143 { &vop_abortop_desc, spec_abortop }, /* abortop */ 144 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 145 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 146 { &vop_lock_desc, ufs_lock }, /* lock */ 147 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 148 { &vop_bmap_desc, spec_bmap }, /* bmap */ 149 { &vop_strategy_desc, spec_strategy }, /* strategy */ 150 { &vop_print_desc, ufs_print }, /* print */ 151 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 152 { &vop_pathconf_desc, spec_pathconf }, /* pathconf */ 153 { &vop_advlock_desc, spec_advlock }, /* advlock */ 154 { &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */ 155 { &vop_valloc_desc, spec_valloc }, /* valloc */ 156 { &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */ 157 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 158 { &vop_truncate_desc, spec_truncate }, /* truncate */ 159 { &vop_update_desc, ffs_update }, /* update */ 160 { &vop_bwrite_desc, vn_bwrite }, 161 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 162 }; 163 struct vnodeopv_desc ffs_specop_opv_desc = 164 { &ffs_specop_p, ffs_specop_entries }; 165 166 int (**ffs_fifoop_p)(); 167 struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 168 { &vop_default_desc, vn_default_error }, 169 { &vop_lookup_desc, fifo_lookup }, /* lookup */ 170 { &vop_create_desc, fifo_create }, /* create */ 171 { &vop_mknod_desc, fifo_mknod }, /* mknod */ 172 { &vop_open_desc, fifo_open }, /* open */ 173 { &vop_close_desc, ufsfifo_close }, /* close */ 174 { &vop_access_desc, ufs_access }, /* access */ 175 { &vop_getattr_desc, ufs_getattr }, /* getattr */ 176 { &vop_setattr_desc, ufs_setattr }, /* setattr */ 177 { &vop_read_desc, ufsfifo_read }, /* read */ 178 { &vop_write_desc, ufsfifo_write }, /* write */ 179 { &vop_ioctl_desc, fifo_ioctl }, /* ioctl */ 180 { &vop_select_desc, fifo_select }, /* select */ 181 { &vop_mmap_desc, fifo_mmap }, /* mmap */ 182 { &vop_fsync_desc, ffs_fsync }, /* fsync */ 183 { &vop_seek_desc, fifo_seek }, /* seek */ 184 { &vop_remove_desc, fifo_remove }, /* remove */ 185 { &vop_link_desc, fifo_link }, /* link */ 186 { &vop_rename_desc, fifo_rename }, /* rename */ 187 { &vop_mkdir_desc, fifo_mkdir }, /* mkdir */ 188 { &vop_rmdir_desc, fifo_rmdir }, /* rmdir */ 189 { &vop_symlink_desc, fifo_symlink }, /* symlink */ 190 { &vop_readdir_desc, fifo_readdir }, /* readdir */ 191 { &vop_readlink_desc, fifo_readlink }, /* readlink */ 192 { &vop_abortop_desc, fifo_abortop }, /* abortop */ 193 { &vop_inactive_desc, ufs_inactive }, /* inactive */ 194 { &vop_reclaim_desc, ufs_reclaim }, /* reclaim */ 195 { &vop_lock_desc, ufs_lock }, /* lock */ 196 { &vop_unlock_desc, ufs_unlock }, /* unlock */ 197 { &vop_bmap_desc, fifo_bmap }, /* bmap */ 198 { &vop_strategy_desc, fifo_strategy }, /* strategy */ 199 { &vop_print_desc, ufs_print }, /* print */ 200 { &vop_islocked_desc, ufs_islocked }, /* islocked */ 201 { &vop_pathconf_desc, fifo_pathconf }, /* pathconf */ 202 { &vop_advlock_desc, fifo_advlock }, /* advlock */ 203 { &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */ 204 { &vop_valloc_desc, fifo_valloc }, /* valloc */ 205 { &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */ 206 { &vop_vfree_desc, ffs_vfree }, /* vfree */ 207 { &vop_truncate_desc, fifo_truncate }, /* truncate */ 208 { &vop_update_desc, ffs_update }, /* update */ 209 { &vop_bwrite_desc, vn_bwrite }, 210 { (struct vnodeop_desc*)NULL, (int(*)())NULL } 211 }; 212 struct vnodeopv_desc ffs_fifoop_opv_desc = 213 { &ffs_fifoop_p, ffs_fifoop_entries }; 214 215 VNODEOP_SET(ffs_vnodeop_opv_desc); 216 VNODEOP_SET(ffs_specop_opv_desc); 217 VNODEOP_SET(ffs_fifoop_opv_desc); 218 219 #ifdef DEBUG 220 /* 221 * Enabling cluster read/write operations. 222 */ 223 #include <sys/sysctl.h> 224 int doclusterread = 1; 225 struct ctldebug debug11 = { "doclusterread", &doclusterread }; 226 int doclusterwrite = 1; 227 struct ctldebug debug12 = { "doclusterwrite", &doclusterwrite }; 228 #else 229 /* XXX for ufs_readwrite */ 230 #define doclusterread 1 231 #define doclusterwrite 1 232 #endif 233 234 #include <ufs/ufs/ufs_readwrite.c> 235 236 /* 237 * Synch an open file. 238 */ 239 /* ARGSUSED */ 240 int 241 ffs_fsync(ap) 242 struct vop_fsync_args /* { 243 struct vnode *a_vp; 244 struct ucred *a_cred; 245 int a_waitfor; 246 struct proc *a_p; 247 } */ *ap; 248 { 249 register struct vnode *vp = ap->a_vp; 250 register struct buf *bp; 251 struct timeval tv; 252 struct buf *nbp; 253 int pass; 254 int s; 255 256 pass = 0; 257 /* 258 * Flush all dirty buffers associated with a vnode. 259 */ 260 loop: 261 s = splbio(); 262 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 263 nbp = bp->b_vnbufs.le_next; 264 if ((bp->b_flags & B_BUSY) || (pass == 0 && (bp->b_blkno < 0))) 265 continue; 266 if ((bp->b_flags & B_DELWRI) == 0) 267 panic("ffs_fsync: not dirty"); 268 269 if (bp->b_vp != vp || ap->a_waitfor != MNT_NOWAIT) { 270 271 bremfree(bp); 272 bp->b_flags |= B_BUSY; 273 splx(s); 274 /* 275 * Wait for I/O associated with indirect blocks to complete, 276 * since there is no way to quickly wait for them below. 277 */ 278 if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT) 279 (void) bawrite(bp); 280 else 281 (void) bwrite(bp); 282 } else { 283 vfs_bio_awrite(bp); 284 splx(s); 285 } 286 goto loop; 287 } 288 splx(s); 289 290 if (pass == 0) { 291 pass = 1; 292 goto loop; 293 } 294 295 if (ap->a_waitfor == MNT_WAIT) { 296 s = splbio(); 297 while (vp->v_numoutput) { 298 vp->v_flag |= VBWAIT; 299 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffsfsn", 0); 300 } 301 splx(s); 302 #ifdef DIAGNOSTIC 303 if (vp->v_dirtyblkhd.lh_first) { 304 vprint("ffs_fsync: dirty", vp); 305 goto loop; 306 } 307 #endif 308 } 309 310 tv = time; 311 return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT)); 312 } 313