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 VFS_MPUNLOCK(mp); 110 return (error); 111 } 112 113 /* 114 * MPSAFE 115 */ 116 int 117 vfs_unmount(struct mount *mp, int mntflags) 118 { 119 VFS_MPLOCK_DECLARE; 120 int error; 121 122 VFS_MPLOCK1(mp); 123 error = (mp->mnt_op->vfs_unmount)(mp, mntflags); 124 VFS_MPUNLOCK(mp); 125 return (error); 126 } 127 128 /* 129 * MPSAFE 130 */ 131 int 132 vfs_root(struct mount *mp, struct vnode **vpp) 133 { 134 VFS_MPLOCK_DECLARE; 135 int error; 136 137 VFS_MPLOCK1(mp); 138 error = (mp->mnt_op->vfs_root)(mp, vpp); 139 VFS_MPUNLOCK(mp); 140 return (error); 141 } 142 143 /* 144 * MPSAFE 145 */ 146 int 147 vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg, 148 struct ucred *cred) 149 { 150 VFS_MPLOCK_DECLARE; 151 int error; 152 153 VFS_MPLOCK1(mp); 154 error = (mp->mnt_op->vfs_quotactl)(mp, cmds, uid, arg, cred); 155 VFS_MPUNLOCK(mp); 156 return (error); 157 } 158 159 /* 160 * MPSAFE 161 */ 162 int 163 vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) 164 { 165 VFS_MPLOCK_DECLARE; 166 int error; 167 168 VFS_MPLOCK1(mp); 169 error = (mp->mnt_op->vfs_statfs)(mp, sbp, cred); 170 VFS_MPUNLOCK(mp); 171 return (error); 172 } 173 174 int 175 vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) 176 { 177 VFS_MPLOCK_DECLARE; 178 int error; 179 180 VFS_MPLOCK1(mp); 181 error = (mp->mnt_op->vfs_statvfs)(mp, sbp, cred); 182 VFS_MPUNLOCK(mp); 183 return (error); 184 } 185 186 /* 187 * MPSAFE 188 */ 189 int 190 vfs_sync(struct mount *mp, int waitfor) 191 { 192 VFS_MPLOCK_DECLARE; 193 int error; 194 195 VFS_MPLOCK1(mp); 196 error = (mp->mnt_op->vfs_sync)(mp, waitfor); 197 VFS_MPUNLOCK(mp); 198 return (error); 199 } 200 201 /* 202 * MPSAFE 203 */ 204 int 205 vfs_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp) 206 { 207 VFS_MPLOCK_DECLARE; 208 int error; 209 210 VFS_MPLOCK1(mp); 211 error = (mp->mnt_op->vfs_vget)(mp, dvp, ino, vpp); 212 VFS_MPUNLOCK(mp); 213 return (error); 214 } 215 216 /* 217 * MPSAFE 218 */ 219 int 220 vfs_fhtovp(struct mount *mp, struct vnode *rootvp, 221 struct fid *fhp, struct vnode **vpp) 222 { 223 VFS_MPLOCK_DECLARE; 224 int error; 225 226 VFS_MPLOCK1(mp); 227 error = (mp->mnt_op->vfs_fhtovp)(mp, rootvp, fhp, vpp); 228 VFS_MPUNLOCK(mp); 229 return (error); 230 } 231 232 /* 233 * MPSAFE 234 */ 235 int 236 vfs_checkexp(struct mount *mp, struct sockaddr *nam, 237 int *extflagsp, struct ucred **credanonp) 238 { 239 VFS_MPLOCK_DECLARE; 240 int error; 241 242 VFS_MPLOCK1(mp); 243 error = (mp->mnt_op->vfs_checkexp)(mp, nam, extflagsp, credanonp); 244 VFS_MPUNLOCK(mp); 245 return (error); 246 } 247 248 /* 249 * MPSAFE 250 */ 251 int 252 vfs_vptofh(struct vnode *vp, struct fid *fhp) 253 { 254 VFS_MPLOCK_DECLARE; 255 int error; 256 257 VFS_MPLOCK1(vp->v_mount); 258 error = (vp->v_mount->mnt_op->vfs_vptofh)(vp, fhp); 259 VFS_MPUNLOCK(vp->v_mount); 260 return (error); 261 } 262 263 /* 264 * MPSAFE 265 */ 266 int 267 vfs_init(struct vfsconf *vfc) 268 { 269 int error; 270 271 get_mplock(); 272 error = (vfc->vfc_vfsops->vfs_init)(vfc); 273 rel_mplock(); 274 275 return (error); 276 } 277 278 /* 279 * MPSAFE 280 */ 281 int 282 vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp) 283 { 284 int error; 285 286 get_mplock(); 287 error = (vfc->vfc_vfsops->vfs_uninit)(vfsp); 288 rel_mplock(); 289 290 return (error); 291 } 292 293 /* 294 * MPSAFE 295 */ 296 int 297 vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp, 298 int attrnamespace, const char *attrname, 299 struct ucred *cred) 300 { 301 VFS_MPLOCK_DECLARE; 302 int error; 303 304 VFS_MPLOCK1(mp); 305 error = (mp->mnt_op->vfs_extattrctl)(mp, cmd, vp, 306 attrnamespace, attrname, 307 cred); 308 VFS_MPUNLOCK(mp); 309 return (error); 310 } 311