1 /* 2 * Copyright (c) 2009 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 /* 35 * Implement mp->mnt_ops function call wrappers. 36 * 37 * These wrappers are responsible for handling all MPSAFE issues related to 38 * a mount. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/buf.h> 44 #include <sys/conf.h> 45 #include <sys/dirent.h> 46 #include <sys/domain.h> 47 #include <sys/eventhandler.h> 48 #include <sys/fcntl.h> 49 #include <sys/kernel.h> 50 #include <sys/kthread.h> 51 #include <sys/malloc.h> 52 #include <sys/mbuf.h> 53 #include <sys/mount.h> 54 #include <sys/proc.h> 55 #include <sys/namei.h> 56 #include <sys/reboot.h> 57 #include <sys/socket.h> 58 #include <sys/stat.h> 59 #include <sys/sysctl.h> 60 #include <sys/syslog.h> 61 #include <sys/vmmeter.h> 62 #include <sys/vnode.h> 63 #include <sys/vfsops.h> 64 #include <sys/sysmsg.h> 65 66 #include <machine/limits.h> 67 68 #include <vm/vm.h> 69 #include <vm/vm_object.h> 70 #include <vm/vm_extern.h> 71 #include <vm/vm_kern.h> 72 #include <vm/pmap.h> 73 #include <vm/vm_map.h> 74 #include <vm/vm_page.h> 75 #include <vm/vm_pager.h> 76 #include <vm/vnode_pager.h> 77 #include <vm/vm_zone.h> 78 79 #include <sys/buf2.h> 80 #include <sys/thread2.h> 81 #include <sys/mplock2.h> 82 83 /* 84 * MPSAFE 85 */ 86 int 87 vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) 88 { 89 VFS_MPLOCK_DECLARE; 90 int error; 91 92 VFS_MPLOCK1(mp); 93 error = (mp->mnt_op->vfs_mount)(mp, path, data, cred); 94 VFS_MPUNLOCK(mp); 95 return (error); 96 } 97 98 /* 99 * MPSAFE 100 */ 101 int 102 vfs_start(struct mount *mp, int flags) 103 { 104 VFS_MPLOCK_DECLARE; 105 int error; 106 107 VFS_MPLOCK1(mp); 108 error = (mp->mnt_op->vfs_start)(mp, flags); 109 if (error == 0) 110 /* do not call vfs_acinit on mount updates */ 111 if ((mp->mnt_flag & MNT_UPDATE) == 0) 112 error = (mp->mnt_op->vfs_acinit)(mp); 113 VFS_MPUNLOCK(mp); 114 return (error); 115 } 116 117 /* 118 * MPSAFE 119 */ 120 int 121 vfs_unmount(struct mount *mp, int mntflags) 122 { 123 VFS_MPLOCK_DECLARE; 124 int error; 125 126 VFS_MPLOCK1(mp); 127 error = (mp->mnt_op->vfs_acdone)(mp); 128 if (error == 0) 129 error = (mp->mnt_op->vfs_unmount)(mp, mntflags); 130 VFS_MPUNLOCK(mp); 131 return (error); 132 } 133 134 /* 135 * MPSAFE 136 */ 137 int 138 vfs_root(struct mount *mp, struct vnode **vpp) 139 { 140 VFS_MPLOCK_DECLARE; 141 int error; 142 143 VFS_MPLOCK1(mp); 144 error = (mp->mnt_op->vfs_root)(mp, vpp); 145 VFS_MPUNLOCK(mp); 146 return (error); 147 } 148 149 /* 150 * MPSAFE 151 */ 152 int 153 vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 154 struct ucred *cred) 155 { 156 VFS_MPLOCK_DECLARE; 157 int error; 158 159 VFS_MPLOCK1(mp); 160 error = (mp->mnt_op->vfs_quotactl)(mp, cmds, uid, arg, cred); 161 VFS_MPUNLOCK(mp); 162 return (error); 163 } 164 165 /* 166 * MPSAFE 167 */ 168 int 169 vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 170 { 171 VFS_MPLOCK_DECLARE; 172 int error; 173 174 VFS_MPLOCK1(mp); 175 error = (mp->mnt_op->vfs_statfs)(mp, sbp, cred); 176 VFS_MPUNLOCK(mp); 177 return (error); 178 } 179 180 int 181 vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 182 { 183 VFS_MPLOCK_DECLARE; 184 int error; 185 186 VFS_MPLOCK1(mp); 187 error = (mp->mnt_op->vfs_statvfs)(mp, sbp, cred); 188 VFS_MPUNLOCK(mp); 189 return (error); 190 } 191 192 /* 193 * MPSAFE 194 */ 195 int 196 vfs_sync(struct mount *mp, int waitfor) 197 { 198 VFS_MPLOCK_DECLARE; 199 int error; 200 201 VFS_MPLOCK1(mp); 202 error = (mp->mnt_op->vfs_sync)(mp, waitfor); 203 VFS_MPUNLOCK(mp); 204 return (error); 205 } 206 207 /* 208 * MPSAFE 209 */ 210 int 211 vfs_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 212 { 213 VFS_MPLOCK_DECLARE; 214 int error; 215 216 VFS_MPLOCK1(mp); 217 error = (mp->mnt_op->vfs_vget)(mp, dvp, ino, vpp); 218 VFS_MPUNLOCK(mp); 219 return (error); 220 } 221 222 /* 223 * MPSAFE 224 */ 225 int 226 vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 227 struct fid *fhp, struct vnode **vpp) 228 { 229 VFS_MPLOCK_DECLARE; 230 int error; 231 232 VFS_MPLOCK1(mp); 233 error = (mp->mnt_op->vfs_fhtovp)(mp, rootvp, fhp, vpp); 234 VFS_MPUNLOCK(mp); 235 return (error); 236 } 237 238 /* 239 * MPSAFE 240 */ 241 int 242 vfs_checkexp(struct mount *mp, struct sockaddr *nam, 243 int *extflagsp, struct ucred **credanonp) 244 { 245 VFS_MPLOCK_DECLARE; 246 int error; 247 248 VFS_MPLOCK1(mp); 249 error = (mp->mnt_op->vfs_checkexp)(mp, nam, extflagsp, credanonp); 250 VFS_MPUNLOCK(mp); 251 return (error); 252 } 253 254 /* 255 * MPSAFE 256 */ 257 int 258 vfs_vptofh(struct vnode *vp, struct fid *fhp) 259 { 260 VFS_MPLOCK_DECLARE; 261 int error; 262 263 VFS_MPLOCK1(vp->v_mount); 264 error = (vp->v_mount->mnt_op->vfs_vptofh)(vp, fhp); 265 VFS_MPUNLOCK(vp->v_mount); 266 return (error); 267 } 268 269 /* 270 * MPSAFE 271 */ 272 int 273 vfs_init(struct vfsconf *vfc) 274 { 275 int error; 276 277 get_mplock(); 278 error = (vfc->vfc_vfsops->vfs_init)(vfc); 279 rel_mplock(); 280 281 return (error); 282 } 283 284 /* 285 * MPSAFE 286 */ 287 int 288 vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp) 289 { 290 int error; 291 292 get_mplock(); 293 error = (vfc->vfc_vfsops->vfs_uninit)(vfsp); 294 rel_mplock(); 295 296 return (error); 297 } 298 299 /* 300 * MPSAFE 301 */ 302 int 303 vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 304 int attrnamespace, const char *attrname, 305 struct ucred *cred) 306 { 307 VFS_MPLOCK_DECLARE; 308 int error; 309 310 VFS_MPLOCK1(mp); 311 error = (mp->mnt_op->vfs_extattrctl)(mp, cmd, vp, 312 attrnamespace, attrname, 313 cred); 314 VFS_MPUNLOCK(mp); 315 return (error); 316 } 317