2 * Copyright (c) 2007 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sys/vfs/hammer/hammer_vfsops.c,v 1.7 2007/11/27 07:48:52 dillon Exp $
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/vnode.h>
41 #include <sys/mount.h>
42 #include <sys/malloc.h>
43 #include <sys/nlookup.h>
44 #include <sys/fcntl.h>
52 static void hammer_free_hmp(struct mount *mp);
54 static int hammer_vfs_mount(struct mount *mp, char *path, caddr_t data,
56 static int hammer_vfs_unmount(struct mount *mp, int mntflags);
57 static int hammer_vfs_root(struct mount *mp, struct vnode **vpp);
58 static int hammer_vfs_statfs(struct mount *mp, struct statfs *sbp,
60 static int hammer_vfs_sync(struct mount *mp, int waitfor);
61 static int hammer_vfs_init(struct vfsconf *conf);
63 static struct vfsops hammer_vfsops = {
64 .vfs_mount = hammer_vfs_mount,
65 .vfs_unmount = hammer_vfs_unmount,
66 .vfs_root = hammer_vfs_root,
67 .vfs_statfs = hammer_vfs_statfs,
68 .vfs_sync = hammer_vfs_sync,
69 .vfs_vget = hammer_vfs_vget,
70 .vfs_init = hammer_vfs_init
73 MALLOC_DEFINE(M_HAMMER, "hammer-mount", "hammer mount");
75 VFS_SET(hammer_vfsops, hammer, 0);
76 MODULE_VERSION(hammer, 1);
79 hammer_vfs_init(struct vfsconf *conf)
81 hammer_init_alist_config();
86 hammer_vfs_mount(struct mount *mp, char *mntpt, caddr_t data,
89 struct hammer_mount_info info;
91 hammer_volume_t rootvol;
93 const char *upath; /* volume name in userspace */
94 char *path; /* volume name in system space */
98 if ((error = copyin(data, &info, sizeof(info))) != 0)
100 if (info.nvolumes <= 0 || info.nvolumes >= 32768)
104 * Interal mount data structure
106 hmp = kmalloc(sizeof(*hmp), M_HAMMER, M_WAITOK | M_ZERO);
107 mp->mnt_data = (qaddr_t)hmp;
110 mp->mnt_flag |= MNT_RDONLY;
111 hmp->asof = info.asof;
113 hmp->asof = HAMMER_MAX_TID;
115 hmp->zbuf = kmalloc(HAMMER_BUFSIZE, M_HAMMER, M_WAITOK | M_ZERO);
116 hmp->namekey_iterator = mycpu->gd_time_seconds;
117 RB_INIT(&hmp->rb_vols_root);
118 RB_INIT(&hmp->rb_inos_root);
123 path = objcache_get(namei_oc, M_WAITOK);
124 for (i = 0; i < info.nvolumes; ++i) {
125 error = copyin(&info.volumes[i], &upath, sizeof(char *));
127 error = copyinstr(upath, path, MAXPATHLEN, NULL);
129 error = hammer_install_volume(hmp, path);
133 objcache_put(namei_oc, path);
136 * Make sure we found a root volume
138 if (error == 0 && hmp->rootvol == NULL) {
139 kprintf("hammer_mount: No root volume found!\n");
142 if (error == 0 && hmp->rootcl == NULL) {
143 kprintf("hammer_mount: No root cluster found!\n");
152 * No errors, setup enough of the mount point so we can lookup the
155 mp->mnt_iosize_max = MAXPHYS;
156 mp->mnt_kern_flag |= MNTK_FSMID;
157 mp->mnt_stat.f_fsid.val[0] = 0; /* XXX */
158 mp->mnt_stat.f_fsid.val[1] = 0; /* XXX */
161 * note: f_iosize is used by vnode_pager_haspage() when constructing
164 mp->mnt_stat.f_iosize = HAMMER_BUFSIZE;
165 vfs_getnewfsid(mp); /* XXX */
166 mp->mnt_maxsymlinklen = 255;
167 mp->mnt_flag |= MNT_LOCAL;
169 vfs_add_vnodeops(mp, &hammer_vnode_vops, &mp->mnt_vn_norm_ops);
172 * The root volume's ondisk pointer is only valid if we hold a
175 rootvol = hammer_get_root_volume(hmp, &error);
178 ksnprintf(mp->mnt_stat.f_mntfromname,
179 sizeof(mp->mnt_stat.f_mntfromname), "%s",
180 rootvol->ondisk->vol_name);
181 hammer_rel_volume(rootvol, 0);
184 * Locate the root directory using the root cluster's B-Tree as a
185 * starting point. The root directory uses an obj_id of 1.
187 * FUTURE: Leave the root directory cached referenced but unlocked
188 * in hmp->rootvp (need to flush it on unmount).
190 error = hammer_vfs_vget(mp, 1, &rootvp);
194 /*vn_unlock(hmp->rootvp);*/
198 * Cleanup and return.
206 hammer_vfs_unmount(struct mount *mp, int mntflags)
209 struct hammer_mount *hmp = (void *)mp->mnt_data;
215 * Clean out the vnodes
218 if (mntflags & MNT_FORCE)
220 if ((error = vflush(mp, 0, flags)) != 0)
224 * Clean up the internal mount structure and related entities. This
232 * Clean up the internal mount structure and disassociate it from the mount.
233 * This may issue I/O.
236 hammer_free_hmp(struct mount *mp)
238 struct hammer_mount *hmp = (void *)mp->mnt_data;
242 * Clean up the root vnode
251 * Unload & flush inodes
253 RB_SCAN(hammer_ino_rb_tree, &hmp->rb_inos_root, NULL,
254 hammer_unload_inode, NULL);
257 * Unload & flush volumes
259 RB_SCAN(hammer_vol_rb_tree, &hmp->rb_vols_root, NULL,
260 hammer_unload_volume, NULL);
263 mp->mnt_flag &= ~MNT_LOCAL;
265 kfree(hmp->zbuf, M_HAMMER);
266 kfree(hmp, M_HAMMER);
270 * Return the root vnode for the filesystem.
272 * HAMMER stores the root vnode in the hammer_mount structure so
273 * getting it is easy.
276 hammer_vfs_root(struct mount *mp, struct vnode **vpp)
278 struct hammer_mount *hmp = (void *)mp->mnt_data;
281 if (hmp->rootcl == NULL)
284 error = hammer_vfs_vget(mp, 1, vpp);
287 /* FUTURE - cached root vnode */
288 if ((vp = hmp->rootvp) != NULL) {
290 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
301 hammer_vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
308 hammer_vfs_sync(struct mount *mp, int waitfor)