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 1.19 1995/12/07 12:47:52 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_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/ufs_extern.h> 66 67 #include <ufs/ffs/fs.h> 68 #include <ufs/ffs/ffs_extern.h> 69 70 static int ffs_fsync __P((struct vop_fsync_args *)); 71 static int ffs_getpages __P((struct vop_getpages_args *)); 72 static int ffs_read __P((struct vop_read_args *)); 73 static int ffs_write __P((struct vop_write_args *)); 74 75 /* Global vfs data structures for ufs. */ 76 vop_t **ffs_vnodeop_p; 77 static struct vnodeopv_entry_desc ffs_vnodeop_entries[] = { 78 { &vop_default_desc, (vop_t *)vn_default_error }, 79 { &vop_lookup_desc, (vop_t *)ufs_lookup }, /* lookup */ 80 { &vop_create_desc, (vop_t *)ufs_create }, /* create */ 81 { &vop_mknod_desc, (vop_t *)ufs_mknod }, /* mknod */ 82 { &vop_open_desc, (vop_t *)ufs_open }, /* open */ 83 { &vop_close_desc, (vop_t *)ufs_close }, /* close */ 84 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 85 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 86 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 87 { &vop_read_desc, (vop_t *)ffs_read }, /* read */ 88 { &vop_write_desc, (vop_t *)ffs_write }, /* write */ 89 { &vop_ioctl_desc, (vop_t *)ufs_ioctl }, /* ioctl */ 90 { &vop_select_desc, (vop_t *)ufs_select }, /* select */ 91 { &vop_mmap_desc, (vop_t *)ufs_mmap }, /* mmap */ 92 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 93 { &vop_seek_desc, (vop_t *)ufs_seek }, /* seek */ 94 { &vop_remove_desc, (vop_t *)ufs_remove }, /* remove */ 95 { &vop_link_desc, (vop_t *)ufs_link }, /* link */ 96 { &vop_rename_desc, (vop_t *)ufs_rename }, /* rename */ 97 { &vop_mkdir_desc, (vop_t *)ufs_mkdir }, /* mkdir */ 98 { &vop_rmdir_desc, (vop_t *)ufs_rmdir }, /* rmdir */ 99 { &vop_symlink_desc, (vop_t *)ufs_symlink }, /* symlink */ 100 { &vop_readdir_desc, (vop_t *)ufs_readdir }, /* readdir */ 101 { &vop_readlink_desc, (vop_t *)ufs_readlink }, /* readlink */ 102 { &vop_abortop_desc, (vop_t *)ufs_abortop }, /* abortop */ 103 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 104 { &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */ 105 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 106 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 107 { &vop_bmap_desc, (vop_t *)ufs_bmap }, /* bmap */ 108 { &vop_strategy_desc, (vop_t *)ufs_strategy }, /* strategy */ 109 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 110 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 111 { &vop_pathconf_desc, (vop_t *)ufs_pathconf }, /* pathconf */ 112 { &vop_advlock_desc, (vop_t *)ufs_advlock }, /* advlock */ 113 { &vop_blkatoff_desc, (vop_t *)ffs_blkatoff }, /* blkatoff */ 114 { &vop_valloc_desc, (vop_t *)ffs_valloc }, /* valloc */ 115 { &vop_reallocblks_desc, (vop_t *)ffs_reallocblks }, /* reallocblks */ 116 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 117 { &vop_truncate_desc, (vop_t *)ffs_truncate }, /* truncate */ 118 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 119 { &vop_getpages_desc, (vop_t *)ffs_getpages}, /* getpages */ 120 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 121 { NULL, NULL } 122 }; 123 static struct vnodeopv_desc ffs_vnodeop_opv_desc = 124 { &ffs_vnodeop_p, ffs_vnodeop_entries }; 125 126 vop_t **ffs_specop_p; 127 static struct vnodeopv_entry_desc ffs_specop_entries[] = { 128 { &vop_default_desc, (vop_t *)vn_default_error }, 129 { &vop_lookup_desc, (vop_t *)spec_lookup }, /* lookup */ 130 { &vop_create_desc, (vop_t *)spec_create }, /* create */ 131 { &vop_mknod_desc, (vop_t *)spec_mknod }, /* mknod */ 132 { &vop_open_desc, (vop_t *)spec_open }, /* open */ 133 { &vop_close_desc, (vop_t *)ufsspec_close }, /* close */ 134 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 135 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 136 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 137 { &vop_read_desc, (vop_t *)ufsspec_read }, /* read */ 138 { &vop_write_desc, (vop_t *)ufsspec_write }, /* write */ 139 { &vop_ioctl_desc, (vop_t *)spec_ioctl }, /* ioctl */ 140 { &vop_select_desc, (vop_t *)spec_select }, /* select */ 141 { &vop_mmap_desc, (vop_t *)spec_mmap }, /* mmap */ 142 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 143 { &vop_seek_desc, (vop_t *)spec_seek }, /* seek */ 144 { &vop_remove_desc, (vop_t *)spec_remove }, /* remove */ 145 { &vop_link_desc, (vop_t *)spec_link }, /* link */ 146 { &vop_rename_desc, (vop_t *)spec_rename }, /* rename */ 147 { &vop_mkdir_desc, (vop_t *)spec_mkdir }, /* mkdir */ 148 { &vop_rmdir_desc, (vop_t *)spec_rmdir }, /* rmdir */ 149 { &vop_symlink_desc, (vop_t *)spec_symlink }, /* symlink */ 150 { &vop_readdir_desc, (vop_t *)spec_readdir }, /* readdir */ 151 { &vop_readlink_desc, (vop_t *)spec_readlink }, /* readlink */ 152 { &vop_abortop_desc, (vop_t *)spec_abortop }, /* abortop */ 153 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 154 { &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */ 155 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 156 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 157 { &vop_bmap_desc, (vop_t *)spec_bmap }, /* bmap */ 158 { &vop_strategy_desc, (vop_t *)spec_strategy }, /* strategy */ 159 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 160 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 161 { &vop_pathconf_desc, (vop_t *)spec_pathconf }, /* pathconf */ 162 { &vop_advlock_desc, (vop_t *)spec_advlock }, /* advlock */ 163 { &vop_blkatoff_desc, (vop_t *)spec_blkatoff }, /* blkatoff */ 164 { &vop_valloc_desc, (vop_t *)spec_valloc }, /* valloc */ 165 { &vop_reallocblks_desc, (vop_t *)spec_reallocblks }, /* reallocblks */ 166 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 167 { &vop_truncate_desc, (vop_t *)spec_truncate }, /* truncate */ 168 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 169 { &vop_getpages_desc, (vop_t *)spec_getpages}, /* getpages */ 170 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 171 { NULL, NULL } 172 }; 173 static struct vnodeopv_desc ffs_specop_opv_desc = 174 { &ffs_specop_p, ffs_specop_entries }; 175 176 vop_t **ffs_fifoop_p; 177 static struct vnodeopv_entry_desc ffs_fifoop_entries[] = { 178 { &vop_default_desc, (vop_t *)vn_default_error }, 179 { &vop_lookup_desc, (vop_t *)fifo_lookup }, /* lookup */ 180 { &vop_create_desc, (vop_t *)fifo_create }, /* create */ 181 { &vop_mknod_desc, (vop_t *)fifo_mknod }, /* mknod */ 182 { &vop_open_desc, (vop_t *)fifo_open }, /* open */ 183 { &vop_close_desc, (vop_t *)ufsfifo_close }, /* close */ 184 { &vop_access_desc, (vop_t *)ufs_access }, /* access */ 185 { &vop_getattr_desc, (vop_t *)ufs_getattr }, /* getattr */ 186 { &vop_setattr_desc, (vop_t *)ufs_setattr }, /* setattr */ 187 { &vop_read_desc, (vop_t *)ufsfifo_read }, /* read */ 188 { &vop_write_desc, (vop_t *)ufsfifo_write }, /* write */ 189 { &vop_ioctl_desc, (vop_t *)fifo_ioctl }, /* ioctl */ 190 { &vop_select_desc, (vop_t *)fifo_select }, /* select */ 191 { &vop_mmap_desc, (vop_t *)fifo_mmap }, /* mmap */ 192 { &vop_fsync_desc, (vop_t *)ffs_fsync }, /* fsync */ 193 { &vop_seek_desc, (vop_t *)fifo_seek }, /* seek */ 194 { &vop_remove_desc, (vop_t *)fifo_remove }, /* remove */ 195 { &vop_link_desc, (vop_t *)fifo_link }, /* link */ 196 { &vop_rename_desc, (vop_t *)fifo_rename }, /* rename */ 197 { &vop_mkdir_desc, (vop_t *)fifo_mkdir }, /* mkdir */ 198 { &vop_rmdir_desc, (vop_t *)fifo_rmdir }, /* rmdir */ 199 { &vop_symlink_desc, (vop_t *)fifo_symlink }, /* symlink */ 200 { &vop_readdir_desc, (vop_t *)fifo_readdir }, /* readdir */ 201 { &vop_readlink_desc, (vop_t *)fifo_readlink }, /* readlink */ 202 { &vop_abortop_desc, (vop_t *)fifo_abortop }, /* abortop */ 203 { &vop_inactive_desc, (vop_t *)ufs_inactive }, /* inactive */ 204 { &vop_reclaim_desc, (vop_t *)ufs_reclaim }, /* reclaim */ 205 { &vop_lock_desc, (vop_t *)ufs_lock }, /* lock */ 206 { &vop_unlock_desc, (vop_t *)ufs_unlock }, /* unlock */ 207 { &vop_bmap_desc, (vop_t *)fifo_bmap }, /* bmap */ 208 { &vop_strategy_desc, (vop_t *)fifo_strategy }, /* strategy */ 209 { &vop_print_desc, (vop_t *)ufs_print }, /* print */ 210 { &vop_islocked_desc, (vop_t *)ufs_islocked }, /* islocked */ 211 { &vop_pathconf_desc, (vop_t *)fifo_pathconf }, /* pathconf */ 212 { &vop_advlock_desc, (vop_t *)fifo_advlock }, /* advlock */ 213 { &vop_blkatoff_desc, (vop_t *)fifo_blkatoff }, /* blkatoff */ 214 { &vop_valloc_desc, (vop_t *)fifo_valloc }, /* valloc */ 215 { &vop_reallocblks_desc, (vop_t *)fifo_reallocblks }, /* reallocblks */ 216 { &vop_vfree_desc, (vop_t *)ffs_vfree }, /* vfree */ 217 { &vop_truncate_desc, (vop_t *)fifo_truncate }, /* truncate */ 218 { &vop_update_desc, (vop_t *)ffs_update }, /* update */ 219 { &vop_bwrite_desc, (vop_t *)vn_bwrite }, /* bwrite */ 220 { NULL, NULL } 221 }; 222 static struct vnodeopv_desc ffs_fifoop_opv_desc = 223 { &ffs_fifoop_p, ffs_fifoop_entries }; 224 225 VNODEOP_SET(ffs_vnodeop_opv_desc); 226 VNODEOP_SET(ffs_specop_opv_desc); 227 VNODEOP_SET(ffs_fifoop_opv_desc); 228 229 #ifdef DEBUG 230 /* 231 * Enabling cluster read/write operations. 232 */ 233 #include <sys/sysctl.h> 234 int doclusterread = 1; 235 SYSCTL_INT(_debug, 11, doclusterread, CTLFLAG_RW, &doclusterread, 0, ""); 236 int doclusterwrite = 1; 237 SYSCTL_INT(_debug, 12, doclusterwrite, CTLFLAG_RW, &doclusterwrite, 0, ""); 238 #else 239 /* XXX for ufs_readwrite */ 240 #define doclusterread 1 241 #define doclusterwrite 1 242 #endif 243 244 #include <ufs/ufs/ufs_readwrite.c> 245 246 /* 247 * Synch an open file. 248 */ 249 /* ARGSUSED */ 250 static int 251 ffs_fsync(ap) 252 struct vop_fsync_args /* { 253 struct vnode *a_vp; 254 struct ucred *a_cred; 255 int a_waitfor; 256 struct proc *a_p; 257 } */ *ap; 258 { 259 register struct vnode *vp = ap->a_vp; 260 register struct buf *bp; 261 struct timeval tv; 262 struct buf *nbp; 263 int pass; 264 int s; 265 266 pass = 0; 267 /* 268 * Flush all dirty buffers associated with a vnode. 269 */ 270 loop: 271 s = splbio(); 272 for (bp = vp->v_dirtyblkhd.lh_first; bp; bp = nbp) { 273 nbp = bp->b_vnbufs.le_next; 274 if ((bp->b_flags & B_BUSY) || (pass == 0 && (bp->b_blkno < 0))) 275 continue; 276 if ((bp->b_flags & B_DELWRI) == 0) 277 panic("ffs_fsync: not dirty"); 278 279 if (bp->b_vp != vp || ap->a_waitfor != MNT_NOWAIT) { 280 281 bremfree(bp); 282 bp->b_flags |= B_BUSY; 283 splx(s); 284 /* 285 * Wait for I/O associated with indirect blocks to complete, 286 * since there is no way to quickly wait for them below. 287 */ 288 if (bp->b_vp == vp || ap->a_waitfor == MNT_NOWAIT) 289 (void) bawrite(bp); 290 else 291 (void) bwrite(bp); 292 } else { 293 vfs_bio_awrite(bp); 294 splx(s); 295 } 296 goto loop; 297 } 298 splx(s); 299 300 if (pass == 0) { 301 pass = 1; 302 goto loop; 303 } 304 305 if (ap->a_waitfor == MNT_WAIT) { 306 s = splbio(); 307 while (vp->v_numoutput) { 308 vp->v_flag |= VBWAIT; 309 (void) tsleep((caddr_t)&vp->v_numoutput, PRIBIO + 1, "ffsfsn", 0); 310 } 311 splx(s); 312 #ifdef DIAGNOSTIC 313 if (vp->v_dirtyblkhd.lh_first) { 314 vprint("ffs_fsync: dirty", vp); 315 goto loop; 316 } 317 #endif 318 } 319 320 tv = time; 321 return (VOP_UPDATE(ap->a_vp, &tv, &tv, ap->a_waitfor == MNT_WAIT)); 322 } 323