mfs_vfsops.c revision 1.83.8.2
1 1.83.8.2 pooka /* $NetBSD: mfs_vfsops.c,v 1.83.8.2 2007/07/31 21:14:21 pooka Exp $ */ 2 1.83.8.2 pooka 3 1.83.8.2 pooka /* 4 1.83.8.2 pooka * Copyright (c) 1989, 1990, 1993, 1994 5 1.83.8.2 pooka * The Regents of the University of California. All rights reserved. 6 1.83.8.2 pooka * 7 1.83.8.2 pooka * Redistribution and use in source and binary forms, with or without 8 1.83.8.2 pooka * modification, are permitted provided that the following conditions 9 1.83.8.2 pooka * are met: 10 1.83.8.2 pooka * 1. Redistributions of source code must retain the above copyright 11 1.83.8.2 pooka * notice, this list of conditions and the following disclaimer. 12 1.83.8.2 pooka * 2. Redistributions in binary form must reproduce the above copyright 13 1.83.8.2 pooka * notice, this list of conditions and the following disclaimer in the 14 1.83.8.2 pooka * documentation and/or other materials provided with the distribution. 15 1.83.8.2 pooka * 3. Neither the name of the University nor the names of its contributors 16 1.83.8.2 pooka * may be used to endorse or promote products derived from this software 17 1.83.8.2 pooka * without specific prior written permission. 18 1.83.8.2 pooka * 19 1.83.8.2 pooka * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.83.8.2 pooka * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.83.8.2 pooka * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.83.8.2 pooka * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.83.8.2 pooka * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.83.8.2 pooka * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.83.8.2 pooka * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.83.8.2 pooka * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.83.8.2 pooka * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.83.8.2 pooka * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.83.8.2 pooka * SUCH DAMAGE. 30 1.83.8.2 pooka * 31 1.83.8.2 pooka * @(#)mfs_vfsops.c 8.11 (Berkeley) 6/19/95 32 1.83.8.2 pooka */ 33 1.83.8.2 pooka 34 1.83.8.2 pooka #include <sys/cdefs.h> 35 1.83.8.2 pooka __KERNEL_RCSID(0, "$NetBSD: mfs_vfsops.c,v 1.83.8.2 2007/07/31 21:14:21 pooka Exp $"); 36 1.83.8.2 pooka 37 1.83.8.2 pooka #if defined(_KERNEL_OPT) 38 1.83.8.2 pooka #include "opt_compat_netbsd.h" 39 1.83.8.2 pooka #endif 40 1.83.8.2 pooka 41 1.83.8.2 pooka #include <sys/param.h> 42 1.83.8.2 pooka #include <sys/systm.h> 43 1.83.8.2 pooka #include <sys/sysctl.h> 44 1.83.8.2 pooka #include <sys/time.h> 45 1.83.8.2 pooka #include <sys/kernel.h> 46 1.83.8.2 pooka #include <sys/proc.h> 47 1.83.8.2 pooka #include <sys/buf.h> 48 1.83.8.2 pooka #include <sys/bufq.h> 49 1.83.8.2 pooka #include <sys/mount.h> 50 1.83.8.2 pooka #include <sys/signalvar.h> 51 1.83.8.2 pooka #include <sys/vnode.h> 52 1.83.8.2 pooka #include <sys/malloc.h> 53 1.83.8.2 pooka 54 1.83.8.2 pooka #include <miscfs/syncfs/syncfs.h> 55 1.83.8.2 pooka 56 1.83.8.2 pooka #include <ufs/ufs/quota.h> 57 1.83.8.2 pooka #include <ufs/ufs/inode.h> 58 1.83.8.2 pooka #include <ufs/ufs/ufsmount.h> 59 1.83.8.2 pooka #include <ufs/ufs/ufs_extern.h> 60 1.83.8.2 pooka 61 1.83.8.2 pooka #include <ufs/ffs/fs.h> 62 1.83.8.2 pooka #include <ufs/ffs/ffs_extern.h> 63 1.83.8.2 pooka 64 1.83.8.2 pooka #include <ufs/mfs/mfsnode.h> 65 1.83.8.2 pooka #include <ufs/mfs/mfs_extern.h> 66 1.83.8.2 pooka 67 1.83.8.2 pooka void * mfs_rootbase; /* address of mini-root in kernel virtual memory */ 68 1.83.8.2 pooka u_long mfs_rootsize; /* size of mini-root in bytes */ 69 1.83.8.2 pooka 70 1.83.8.2 pooka static int mfs_minor; /* used for building internal dev_t */ 71 1.83.8.2 pooka 72 1.83.8.2 pooka extern int (**mfs_vnodeop_p)(void *); 73 1.83.8.2 pooka 74 1.83.8.2 pooka MALLOC_JUSTDEFINE(M_MFSNODE, "MFS node", "MFS vnode private part"); 75 1.83.8.2 pooka 76 1.83.8.2 pooka /* 77 1.83.8.2 pooka * mfs vfs operations. 78 1.83.8.2 pooka */ 79 1.83.8.2 pooka 80 1.83.8.2 pooka extern const struct vnodeopv_desc mfs_vnodeop_opv_desc; 81 1.83.8.2 pooka 82 1.83.8.2 pooka const struct vnodeopv_desc * const mfs_vnodeopv_descs[] = { 83 1.83.8.2 pooka &mfs_vnodeop_opv_desc, 84 1.83.8.2 pooka NULL, 85 1.83.8.2 pooka }; 86 1.83.8.2 pooka 87 1.83.8.2 pooka struct vfsops mfs_vfsops = { 88 1.83.8.2 pooka MOUNT_MFS, 89 1.83.8.2 pooka sizeof (struct mfs_args), 90 1.83.8.2 pooka mfs_mount, 91 1.83.8.2 pooka mfs_start, 92 1.83.8.2 pooka ffs_unmount, 93 1.83.8.2 pooka ufs_root, 94 1.83.8.2 pooka ufs_quotactl, 95 1.83.8.2 pooka mfs_statvfs, 96 1.83.8.2 pooka ffs_sync, 97 1.83.8.2 pooka ffs_vget, 98 1.83.8.2 pooka ffs_fhtovp, 99 1.83.8.2 pooka ffs_vptofh, 100 1.83.8.2 pooka mfs_init, 101 1.83.8.2 pooka mfs_reinit, 102 1.83.8.2 pooka mfs_done, 103 1.83.8.2 pooka NULL, 104 1.83.8.2 pooka (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, 105 1.83.8.2 pooka vfs_stdextattrctl, 106 1.83.8.2 pooka (void *)eopnotsupp, /* vfs_suspendctl */ 107 1.83.8.2 pooka mfs_vnodeopv_descs, 108 1.83.8.2 pooka 0, 109 1.83.8.2 pooka { NULL, NULL }, 110 1.83.8.2 pooka }; 111 1.83.8.2 pooka VFS_ATTACH(mfs_vfsops); 112 1.83.8.2 pooka 113 1.83.8.2 pooka SYSCTL_SETUP(sysctl_vfs_mfs_setup, "sysctl vfs.mfs subtree setup") 114 1.83.8.2 pooka { 115 1.83.8.2 pooka 116 1.83.8.2 pooka sysctl_createv(clog, 0, NULL, NULL, 117 1.83.8.2 pooka CTLFLAG_PERMANENT, 118 1.83.8.2 pooka CTLTYPE_NODE, "vfs", NULL, 119 1.83.8.2 pooka NULL, 0, NULL, 0, 120 1.83.8.2 pooka CTL_VFS, CTL_EOL); 121 1.83.8.2 pooka sysctl_createv(clog, 0, NULL, NULL, 122 1.83.8.2 pooka CTLFLAG_PERMANENT|CTLFLAG_ALIAS, 123 1.83.8.2 pooka CTLTYPE_NODE, "mfs", 124 1.83.8.2 pooka SYSCTL_DESCR("Memory based file system"), 125 1.83.8.2 pooka NULL, 1, NULL, 0, 126 1.83.8.2 pooka CTL_VFS, 3, CTL_EOL); 127 1.83.8.2 pooka /* 128 1.83.8.2 pooka * XXX the "1" and the "3" above could be dynamic, thereby 129 1.83.8.2 pooka * eliminating one more instance of the "number to vfs" 130 1.83.8.2 pooka * mapping problem, but they are in order as taken from 131 1.83.8.2 pooka * sys/mount.h 132 1.83.8.2 pooka */ 133 1.83.8.2 pooka } 134 1.83.8.2 pooka 135 1.83.8.2 pooka /* 136 1.83.8.2 pooka * Memory based filesystem initialization. 137 1.83.8.2 pooka */ 138 1.83.8.2 pooka void 139 1.83.8.2 pooka mfs_init(void) 140 1.83.8.2 pooka { 141 1.83.8.2 pooka 142 1.83.8.2 pooka malloc_type_attach(M_MFSNODE); 143 1.83.8.2 pooka /* 144 1.83.8.2 pooka * ffs_init() ensures to initialize necessary resources 145 1.83.8.2 pooka * only once. 146 1.83.8.2 pooka */ 147 1.83.8.2 pooka ffs_init(); 148 1.83.8.2 pooka } 149 1.83.8.2 pooka 150 1.83.8.2 pooka void 151 1.83.8.2 pooka mfs_reinit(void) 152 1.83.8.2 pooka { 153 1.83.8.2 pooka ffs_reinit(); 154 1.83.8.2 pooka } 155 1.83.8.2 pooka 156 1.83.8.2 pooka void 157 1.83.8.2 pooka mfs_done(void) 158 1.83.8.2 pooka { 159 1.83.8.2 pooka /* 160 1.83.8.2 pooka * ffs_done() ensures to free necessary resources 161 1.83.8.2 pooka * only once, when it's no more needed. 162 1.83.8.2 pooka */ 163 1.83.8.2 pooka ffs_done(); 164 1.83.8.2 pooka malloc_type_detach(M_MFSNODE); 165 1.83.8.2 pooka } 166 1.83.8.2 pooka 167 1.83.8.2 pooka /* 168 1.83.8.2 pooka * Called by main() when mfs is going to be mounted as root. 169 1.83.8.2 pooka */ 170 1.83.8.2 pooka 171 1.83.8.2 pooka int 172 1.83.8.2 pooka mfs_mountroot(void) 173 1.83.8.2 pooka { 174 1.83.8.2 pooka struct fs *fs; 175 1.83.8.2 pooka struct mount *mp; 176 1.83.8.2 pooka struct lwp *l = curlwp; /* XXX */ 177 1.83.8.2 pooka struct ufsmount *ump; 178 1.83.8.2 pooka struct mfsnode *mfsp; 179 1.83.8.2 pooka int error = 0; 180 1.83.8.2 pooka 181 1.83.8.2 pooka if ((error = vfs_rootmountalloc(MOUNT_MFS, "mfs_root", &mp))) { 182 1.83.8.2 pooka vrele(rootvp); 183 1.83.8.2 pooka return (error); 184 1.83.8.2 pooka } 185 1.83.8.2 pooka 186 1.83.8.2 pooka mfsp = malloc(sizeof *mfsp, M_MFSNODE, M_WAITOK); 187 1.83.8.2 pooka rootvp->v_data = mfsp; 188 1.83.8.2 pooka rootvp->v_op = mfs_vnodeop_p; 189 1.83.8.2 pooka rootvp->v_tag = VT_MFS; 190 1.83.8.2 pooka mfsp->mfs_baseoff = mfs_rootbase; 191 1.83.8.2 pooka mfsp->mfs_size = mfs_rootsize; 192 1.83.8.2 pooka mfsp->mfs_vnode = rootvp; 193 1.83.8.2 pooka mfsp->mfs_proc = NULL; /* indicate kernel space */ 194 1.83.8.2 pooka mfsp->mfs_shutdown = 0; 195 1.83.8.2 pooka bufq_alloc(&mfsp->mfs_buflist, "fcfs", 0); 196 1.83.8.2 pooka if ((error = ffs_mountfs(rootvp, mp, l)) != 0) { 197 1.83.8.2 pooka mp->mnt_op->vfs_refcount--; 198 1.83.8.2 pooka vfs_unbusy(mp); 199 1.83.8.2 pooka bufq_free(mfsp->mfs_buflist); 200 1.83.8.2 pooka free(mp, M_MOUNT); 201 1.83.8.2 pooka free(mfsp, M_MFSNODE); 202 1.83.8.2 pooka return (error); 203 1.83.8.2 pooka } 204 1.83.8.2 pooka simple_lock(&mountlist_slock); 205 1.83.8.2 pooka CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 206 1.83.8.2 pooka simple_unlock(&mountlist_slock); 207 1.83.8.2 pooka mp->mnt_vnodecovered = NULLVP; 208 1.83.8.2 pooka ump = VFSTOUFS(mp); 209 1.83.8.2 pooka fs = ump->um_fs; 210 1.83.8.2 pooka (void) copystr(mp->mnt_stat.f_mntonname, fs->fs_fsmnt, MNAMELEN - 1, 0); 211 1.83.8.2 pooka (void)ffs_statvfs(mp, &mp->mnt_stat, l); 212 1.83.8.2 pooka vfs_unbusy(mp); 213 1.83.8.2 pooka return (0); 214 1.83.8.2 pooka } 215 1.83.8.2 pooka 216 1.83.8.2 pooka /* 217 1.83.8.2 pooka * This is called early in boot to set the base address and size 218 1.83.8.2 pooka * of the mini-root. 219 1.83.8.2 pooka */ 220 1.83.8.2 pooka int 221 1.83.8.2 pooka mfs_initminiroot(void *base) 222 1.83.8.2 pooka { 223 1.83.8.2 pooka struct fs *fs = (struct fs *)((char *)base + SBLOCK_UFS1); 224 1.83.8.2 pooka 225 1.83.8.2 pooka /* check for valid super block */ 226 1.83.8.2 pooka if (fs->fs_magic != FS_UFS1_MAGIC || fs->fs_bsize > MAXBSIZE || 227 1.83.8.2 pooka fs->fs_bsize < sizeof(struct fs)) 228 1.83.8.2 pooka return (0); 229 1.83.8.2 pooka mountroot = mfs_mountroot; 230 1.83.8.2 pooka mfs_rootbase = base; 231 1.83.8.2 pooka mfs_rootsize = fs->fs_fsize * fs->fs_size; 232 1.83.8.2 pooka rootdev = makedev(255, mfs_minor); 233 1.83.8.2 pooka mfs_minor++; 234 1.83.8.2 pooka return (mfs_rootsize); 235 1.83.8.2 pooka } 236 1.83.8.2 pooka 237 1.83.8.2 pooka /* 238 1.83.8.2 pooka * VFS Operations. 239 1.83.8.2 pooka * 240 1.83.8.2 pooka * mount system call 241 1.83.8.2 pooka */ 242 1.83.8.2 pooka /* ARGSUSED */ 243 1.83.8.2 pooka int 244 1.83.8.2 pooka mfs_mount(struct mount *mp, const char *path, void *data, size_t *data_len, 245 1.83.8.2 pooka struct lwp *l) 246 1.83.8.2 pooka { 247 1.83.8.2 pooka struct vnode *devvp; 248 1.83.8.2 pooka struct mfs_args *args = data; 249 1.83.8.2 pooka struct ufsmount *ump; 250 1.83.8.2 pooka struct fs *fs; 251 1.83.8.2 pooka struct mfsnode *mfsp; 252 1.83.8.2 pooka struct proc *p; 253 1.83.8.2 pooka int flags, error = 0; 254 1.83.8.2 pooka 255 1.83.8.2 pooka if (*data_len < sizeof *args) 256 1.83.8.2 pooka return EINVAL; 257 1.83.8.2 pooka 258 1.83.8.2 pooka p = l->l_proc; 259 1.83.8.2 pooka if (mp->mnt_flag & MNT_GETARGS) { 260 1.83.8.2 pooka struct vnode *vp; 261 1.83.8.2 pooka 262 1.83.8.2 pooka ump = VFSTOUFS(mp); 263 1.83.8.2 pooka if (ump == NULL) 264 1.83.8.2 pooka return EIO; 265 1.83.8.2 pooka 266 1.83.8.2 pooka vp = ump->um_devvp; 267 1.83.8.2 pooka if (vp == NULL) 268 1.83.8.2 pooka return EIO; 269 1.83.8.2 pooka 270 1.83.8.2 pooka mfsp = VTOMFS(vp); 271 1.83.8.2 pooka if (mfsp == NULL) 272 1.83.8.2 pooka return EIO; 273 1.83.8.2 pooka 274 1.83.8.2 pooka args->fspec = NULL; 275 1.83.8.2 pooka args->base = mfsp->mfs_baseoff; 276 1.83.8.2 pooka args->size = mfsp->mfs_size; 277 1.83.8.2 pooka *data_len = sizeof *args; 278 1.83.8.2 pooka return 0; 279 1.83.8.2 pooka } 280 1.83.8.2 pooka /* 281 1.83.8.2 pooka * XXX turn off async to avoid hangs when writing lots of data. 282 1.83.8.2 pooka * the problem is that MFS needs to allocate pages to clean pages, 283 1.83.8.2 pooka * so if we wait until the last minute to clean pages then there 284 1.83.8.2 pooka * may not be any pages available to do the cleaning. 285 1.83.8.2 pooka * ... and since the default partially-synchronous mode turns out 286 1.83.8.2 pooka * to not be sufficient under heavy load, make it full synchronous. 287 1.83.8.2 pooka */ 288 1.83.8.2 pooka mp->mnt_flag &= ~MNT_ASYNC; 289 1.83.8.2 pooka mp->mnt_flag |= MNT_SYNCHRONOUS; 290 1.83.8.2 pooka 291 1.83.8.2 pooka /* 292 1.83.8.2 pooka * If updating, check whether changing from read-only to 293 1.83.8.2 pooka * read/write; if there is no device name, that's all we do. 294 1.83.8.2 pooka */ 295 1.83.8.2 pooka if (mp->mnt_flag & MNT_UPDATE) { 296 1.83.8.2 pooka ump = VFSTOUFS(mp); 297 1.83.8.2 pooka fs = ump->um_fs; 298 1.83.8.2 pooka if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) { 299 1.83.8.2 pooka flags = WRITECLOSE; 300 1.83.8.2 pooka if (mp->mnt_flag & MNT_FORCE) 301 1.83.8.2 pooka flags |= FORCECLOSE; 302 1.83.8.2 pooka error = ffs_flushfiles(mp, flags, l); 303 1.83.8.2 pooka if (error) 304 1.83.8.2 pooka return (error); 305 1.83.8.2 pooka } 306 1.83.8.2 pooka if (fs->fs_ronly && (mp->mnt_iflag & IMNT_WANTRDWR)) 307 1.83.8.2 pooka fs->fs_ronly = 0; 308 1.83.8.2 pooka if (args->fspec == NULL) 309 1.83.8.2 pooka return EINVAL; 310 1.83.8.2 pooka return (0); 311 1.83.8.2 pooka } 312 1.83.8.2 pooka error = getnewvnode(VT_MFS, (struct mount *)0, mfs_vnodeop_p, &devvp); 313 1.83.8.2 pooka if (error) 314 1.83.8.2 pooka return (error); 315 1.83.8.2 pooka devvp->v_type = VBLK; 316 1.83.8.2 pooka if (checkalias(devvp, makedev(255, mfs_minor), (struct mount *)0)) 317 1.83.8.2 pooka panic("mfs_mount: dup dev"); 318 1.83.8.2 pooka mfs_minor++; 319 1.83.8.2 pooka mfsp = (struct mfsnode *)malloc(sizeof *mfsp, M_MFSNODE, M_WAITOK); 320 1.83.8.2 pooka devvp->v_data = mfsp; 321 1.83.8.2 pooka mfsp->mfs_baseoff = args->base; 322 1.83.8.2 pooka mfsp->mfs_size = args->size; 323 1.83.8.2 pooka mfsp->mfs_vnode = devvp; 324 1.83.8.2 pooka mfsp->mfs_proc = p; 325 1.83.8.2 pooka mfsp->mfs_shutdown = 0; 326 1.83.8.2 pooka bufq_alloc(&mfsp->mfs_buflist, "fcfs", 0); 327 1.83.8.2 pooka if ((error = ffs_mountfs(devvp, mp, l)) != 0) { 328 1.83.8.2 pooka mfsp->mfs_shutdown = 1; 329 1.83.8.2 pooka vrele(devvp); 330 1.83.8.2 pooka return (error); 331 1.83.8.2 pooka } 332 1.83.8.2 pooka ump = VFSTOUFS(mp); 333 1.83.8.2 pooka fs = ump->um_fs; 334 1.83.8.2 pooka error = set_statvfs_info(path, UIO_USERSPACE, args->fspec, 335 1.83.8.2 pooka UIO_USERSPACE, mp->mnt_op->vfs_name, mp, l); 336 1.83.8.2 pooka if (error) 337 1.83.8.2 pooka return error; 338 1.83.8.2 pooka (void)strncpy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, 339 1.83.8.2 pooka sizeof(fs->fs_fsmnt)); 340 1.83.8.2 pooka fs->fs_fsmnt[sizeof(fs->fs_fsmnt) - 1] = '\0'; 341 1.83.8.2 pooka /* XXX: cleanup on error */ 342 1.83.8.2 pooka return 0; 343 1.83.8.2 pooka } 344 1.83.8.2 pooka 345 1.83.8.2 pooka int mfs_pri = PWAIT | PCATCH; /* XXX prob. temp */ 346 1.83.8.2 pooka 347 1.83.8.2 pooka /* 348 1.83.8.2 pooka * Used to grab the process and keep it in the kernel to service 349 1.83.8.2 pooka * memory filesystem I/O requests. 350 1.83.8.2 pooka * 351 1.83.8.2 pooka * Loop servicing I/O requests. 352 1.83.8.2 pooka * Copy the requested data into or out of the memory filesystem 353 1.83.8.2 pooka * address space. 354 1.83.8.2 pooka */ 355 1.83.8.2 pooka /* ARGSUSED */ 356 1.83.8.2 pooka int 357 1.83.8.2 pooka mfs_start(struct mount *mp, int flags, struct lwp *l) 358 1.83.8.2 pooka { 359 1.83.8.2 pooka struct vnode *vp = VFSTOUFS(mp)->um_devvp; 360 1.83.8.2 pooka struct mfsnode *mfsp = VTOMFS(vp); 361 1.83.8.2 pooka struct proc *p; 362 1.83.8.2 pooka struct buf *bp; 363 1.83.8.2 pooka void *base; 364 1.83.8.2 pooka int sleepreturn = 0; 365 1.83.8.2 pooka ksiginfoq_t kq; 366 1.83.8.2 pooka 367 1.83.8.2 pooka base = mfsp->mfs_baseoff; 368 1.83.8.2 pooka while (mfsp->mfs_shutdown != 1) { 369 1.83.8.2 pooka while ((bp = BUFQ_GET(mfsp->mfs_buflist)) != NULL) { 370 1.83.8.2 pooka mfs_doio(bp, base); 371 1.83.8.2 pooka wakeup((void *)bp); 372 1.83.8.2 pooka } 373 1.83.8.2 pooka /* 374 1.83.8.2 pooka * If a non-ignored signal is received, try to unmount. 375 1.83.8.2 pooka * If that fails, or the filesystem is already in the 376 1.83.8.2 pooka * process of being unmounted, clear the signal (it has been 377 1.83.8.2 pooka * "processed"), otherwise we will loop here, as tsleep 378 1.83.8.2 pooka * will always return EINTR/ERESTART. 379 1.83.8.2 pooka */ 380 1.83.8.2 pooka if (sleepreturn != 0) { 381 1.83.8.2 pooka /* 382 1.83.8.2 pooka * XXX Freeze syncer. Must do this before locking 383 1.83.8.2 pooka * the mount point. See dounmount() for details. 384 1.83.8.2 pooka */ 385 1.83.8.2 pooka mutex_enter(&syncer_mutex); 386 1.83.8.2 pooka if (vfs_busy(mp, LK_NOWAIT, 0) != 0) 387 1.83.8.2 pooka mutex_exit(&syncer_mutex); 388 1.83.8.2 pooka else if (dounmount(mp, 0, l) != 0) { 389 1.83.8.2 pooka p = l->l_proc; 390 1.83.8.2 pooka ksiginfo_queue_init(&kq); 391 1.83.8.2 pooka mutex_enter(&p->p_smutex); 392 1.83.8.2 pooka sigclearall(p, NULL, &kq); 393 1.83.8.2 pooka mutex_exit(&p->p_smutex); 394 1.83.8.2 pooka ksiginfo_queue_drain(&kq); 395 1.83.8.2 pooka } 396 1.83.8.2 pooka sleepreturn = 0; 397 1.83.8.2 pooka continue; 398 1.83.8.2 pooka } 399 1.83.8.2 pooka 400 1.83.8.2 pooka sleepreturn = tsleep(vp, mfs_pri, "mfsidl", 0); 401 1.83.8.2 pooka } 402 1.83.8.2 pooka KASSERT(BUFQ_PEEK(mfsp->mfs_buflist) == NULL); 403 1.83.8.2 pooka bufq_free(mfsp->mfs_buflist); 404 1.83.8.2 pooka return (sleepreturn); 405 1.83.8.2 pooka } 406 1.83.8.2 pooka 407 1.83.8.2 pooka /* 408 1.83.8.2 pooka * Get file system statistics. 409 1.83.8.2 pooka */ 410 1.83.8.2 pooka int 411 1.83.8.2 pooka mfs_statvfs(struct mount *mp, struct statvfs *sbp, struct lwp *l) 412 1.83.8.2 pooka { 413 1.83.8.2 pooka int error; 414 1.83.8.2 pooka 415 1.83.8.2 pooka error = ffs_statvfs(mp, sbp, l); 416 1.83.8.2 pooka if (error) 417 1.83.8.2 pooka return error; 418 1.83.8.2 pooka (void)strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, 419 1.83.8.2 pooka sizeof(sbp->f_fstypename)); 420 1.83.8.2 pooka sbp->f_fstypename[sizeof(sbp->f_fstypename) - 1] = '\0'; 421 1.83.8.2 pooka return 0; 422 1.83.8.2 pooka } 423
Indexes created Tue Oct 21 19:09:51 GMT 2025