Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * JFFS2 -- Journalling Flash File System, Version 2. |
| 3 | * |
David Woodhouse | c00c310 | 2007-04-25 14:16:47 +0100 | [diff] [blame] | 4 | * Copyright © 2001-2007 Red Hat, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Created by David Woodhouse <dwmw2@infradead.org> |
| 7 | * |
| 8 | * For licensing information, see the file 'LICENCE' in this directory. |
| 9 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | */ |
| 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/kernel.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/list.h> |
| 17 | #include <linux/fs.h> |
Artem Bityutskiy | 9c74034 | 2006-10-11 14:52:47 +0300 | [diff] [blame] | 18 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/mount.h> |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 20 | #include <linux/parser.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/jffs2.h> |
| 22 | #include <linux/pagemap.h> |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 23 | #include <linux/mtd/super.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/ctype.h> |
| 25 | #include <linux/namei.h> |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 26 | #include <linux/seq_file.h> |
David Woodhouse | 5f556aa | 2008-07-31 20:39:25 +0100 | [diff] [blame] | 27 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "compr.h" |
| 29 | #include "nodelist.h" |
| 30 | |
| 31 | static void jffs2_put_super(struct super_block *); |
| 32 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 33 | static struct kmem_cache *jffs2_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | static struct inode *jffs2_alloc_inode(struct super_block *sb) |
| 36 | { |
David Woodhouse | 4e571ab | 2008-05-01 12:28:04 +0100 | [diff] [blame] | 37 | struct jffs2_inode_info *f; |
| 38 | |
| 39 | f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); |
| 40 | if (!f) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | return NULL; |
David Woodhouse | 4e571ab | 2008-05-01 12:28:04 +0100 | [diff] [blame] | 42 | return &f->vfs_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | } |
| 44 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 45 | static void jffs2_i_callback(struct rcu_head *head) |
| 46 | { |
| 47 | struct inode *inode = container_of(head, struct inode, i_rcu); |
| 48 | INIT_LIST_HEAD(&inode->i_dentry); |
| 49 | kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode)); |
| 50 | } |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | static void jffs2_destroy_inode(struct inode *inode) |
| 53 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 54 | call_rcu(&inode->i_rcu, jffs2_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | } |
| 56 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 57 | static void jffs2_i_init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | { |
David Woodhouse | 4e571ab | 2008-05-01 12:28:04 +0100 | [diff] [blame] | 59 | struct jffs2_inode_info *f = foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
David Woodhouse | 4e571ab | 2008-05-01 12:28:04 +0100 | [diff] [blame] | 61 | mutex_init(&f->sem); |
| 62 | inode_init_once(&f->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | } |
| 64 | |
Christoph Hellwig | 01ba687 | 2009-05-11 23:34:27 +0200 | [diff] [blame] | 65 | static void jffs2_write_super(struct super_block *sb) |
| 66 | { |
| 67 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 68 | |
| 69 | lock_super(sb); |
Christoph Hellwig | 01ba687 | 2009-05-11 23:34:27 +0200 | [diff] [blame] | 70 | sb->s_dirt = 0; |
| 71 | |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 72 | if (!(sb->s_flags & MS_RDONLY)) { |
| 73 | D1(printk(KERN_DEBUG "jffs2_write_super()\n")); |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 74 | jffs2_flush_wbuf_gc(c, 0); |
| 75 | } |
Christoph Hellwig | 01ba687 | 2009-05-11 23:34:27 +0200 | [diff] [blame] | 76 | |
Christoph Hellwig | ebc1ac1 | 2009-05-11 23:35:03 +0200 | [diff] [blame] | 77 | unlock_super(sb); |
Christoph Hellwig | 01ba687 | 2009-05-11 23:34:27 +0200 | [diff] [blame] | 78 | } |
| 79 | |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 80 | static const char *jffs2_compr_name(unsigned int compr) |
| 81 | { |
| 82 | switch (compr) { |
| 83 | case JFFS2_COMPR_MODE_NONE: |
| 84 | return "none"; |
Andres Salomon | 123005f | 2011-10-16 18:15:23 -0700 | [diff] [blame^] | 85 | #ifdef CONFIG_JFFS2_LZO |
| 86 | case JFFS2_COMPR_MODE_FORCELZO: |
| 87 | return "lzo"; |
| 88 | #endif |
| 89 | #ifdef CONFIG_JFFS2_ZLIB |
| 90 | case JFFS2_COMPR_MODE_FORCEZLIB: |
| 91 | return "zlib"; |
| 92 | #endif |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 93 | default: |
| 94 | /* should never happen; programmer error */ |
| 95 | WARN_ON(1); |
| 96 | return ""; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | static int jffs2_show_options(struct seq_file *s, struct vfsmount *mnt) |
| 101 | { |
| 102 | struct jffs2_sb_info *c = JFFS2_SB_INFO(mnt->mnt_sb); |
| 103 | struct jffs2_mount_opts *opts = &c->mount_opts; |
| 104 | |
| 105 | if (opts->override_compr) |
| 106 | seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr)); |
| 107 | |
| 108 | return 0; |
| 109 | } |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | static int jffs2_sync_fs(struct super_block *sb, int wait) |
| 112 | { |
| 113 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); |
| 114 | |
Christoph Hellwig | d579ed0 | 2009-06-08 10:08:21 +0200 | [diff] [blame] | 115 | jffs2_write_super(sb); |
| 116 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 117 | mutex_lock(&c->alloc_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | jffs2_flush_wbuf_pad(c); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 119 | mutex_unlock(&c->alloc_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | return 0; |
| 121 | } |
| 122 | |
David Woodhouse | 5f556aa | 2008-07-31 20:39:25 +0100 | [diff] [blame] | 123 | static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, |
| 124 | uint32_t generation) |
| 125 | { |
| 126 | /* We don't care about i_generation. We'll destroy the flash |
| 127 | before we start re-using inode numbers anyway. And even |
| 128 | if that wasn't true, we'd have other problems...*/ |
| 129 | return jffs2_iget(sb, ino); |
| 130 | } |
| 131 | |
| 132 | static struct dentry *jffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| 133 | int fh_len, int fh_type) |
| 134 | { |
| 135 | return generic_fh_to_dentry(sb, fid, fh_len, fh_type, |
| 136 | jffs2_nfs_get_inode); |
| 137 | } |
| 138 | |
| 139 | static struct dentry *jffs2_fh_to_parent(struct super_block *sb, struct fid *fid, |
| 140 | int fh_len, int fh_type) |
| 141 | { |
| 142 | return generic_fh_to_parent(sb, fid, fh_len, fh_type, |
| 143 | jffs2_nfs_get_inode); |
| 144 | } |
| 145 | |
| 146 | static struct dentry *jffs2_get_parent(struct dentry *child) |
| 147 | { |
| 148 | struct jffs2_inode_info *f; |
| 149 | uint32_t pino; |
| 150 | |
| 151 | BUG_ON(!S_ISDIR(child->d_inode->i_mode)); |
| 152 | |
| 153 | f = JFFS2_INODE_INFO(child->d_inode); |
| 154 | |
| 155 | pino = f->inocache->pino_nlink; |
| 156 | |
| 157 | JFFS2_DEBUG("Parent of directory ino #%u is #%u\n", |
| 158 | f->inocache->ino, pino); |
| 159 | |
| 160 | return d_obtain_alias(jffs2_iget(child->d_inode->i_sb, pino)); |
| 161 | } |
| 162 | |
Alexey Dobriyan | ac4cfdd | 2009-09-21 17:01:10 -0700 | [diff] [blame] | 163 | static const struct export_operations jffs2_export_ops = { |
David Woodhouse | 5f556aa | 2008-07-31 20:39:25 +0100 | [diff] [blame] | 164 | .get_parent = jffs2_get_parent, |
| 165 | .fh_to_dentry = jffs2_fh_to_dentry, |
| 166 | .fh_to_parent = jffs2_fh_to_parent, |
| 167 | }; |
| 168 | |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 169 | /* |
| 170 | * JFFS2 mount options. |
| 171 | * |
| 172 | * Opt_override_compr: override default compressor |
| 173 | * Opt_err: just end of array marker |
| 174 | */ |
| 175 | enum { |
| 176 | Opt_override_compr, |
| 177 | Opt_err, |
| 178 | }; |
| 179 | |
| 180 | static const match_table_t tokens = { |
| 181 | {Opt_override_compr, "compr=%s"}, |
| 182 | {Opt_err, NULL}, |
| 183 | }; |
| 184 | |
| 185 | static int jffs2_parse_options(struct jffs2_sb_info *c, char *data) |
| 186 | { |
| 187 | substring_t args[MAX_OPT_ARGS]; |
| 188 | char *p, *name; |
| 189 | |
| 190 | if (!data) |
| 191 | return 0; |
| 192 | |
| 193 | while ((p = strsep(&data, ","))) { |
| 194 | int token; |
| 195 | |
| 196 | if (!*p) |
| 197 | continue; |
| 198 | |
| 199 | token = match_token(p, tokens, args); |
| 200 | switch (token) { |
| 201 | case Opt_override_compr: |
| 202 | name = match_strdup(&args[0]); |
| 203 | |
| 204 | if (!name) |
| 205 | return -ENOMEM; |
Andres Salomon | 123005f | 2011-10-16 18:15:23 -0700 | [diff] [blame^] | 206 | if (!strcmp(name, "none")) |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 207 | c->mount_opts.compr = JFFS2_COMPR_MODE_NONE; |
Andres Salomon | 123005f | 2011-10-16 18:15:23 -0700 | [diff] [blame^] | 208 | #ifdef CONFIG_JFFS2_LZO |
| 209 | else if (!strcmp(name, "lzo")) |
| 210 | c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO; |
| 211 | #endif |
| 212 | #ifdef CONFIG_JFFS2_ZLIB |
| 213 | else if (!strcmp(name, "zlib")) |
| 214 | c->mount_opts.compr = |
| 215 | JFFS2_COMPR_MODE_FORCEZLIB; |
| 216 | #endif |
| 217 | else { |
| 218 | printk(KERN_ERR "JFFS2 Error: unknown compressor \"%s\"", |
| 219 | name); |
| 220 | kfree(name); |
| 221 | return -EINVAL; |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 222 | } |
| 223 | kfree(name); |
Andres Salomon | 123005f | 2011-10-16 18:15:23 -0700 | [diff] [blame^] | 224 | c->mount_opts.override_compr = true; |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 225 | break; |
| 226 | default: |
| 227 | printk(KERN_ERR "JFFS2 Error: unrecognized mount option '%s' or missing value\n", |
| 228 | p); |
| 229 | return -EINVAL; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data) |
| 237 | { |
| 238 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); |
| 239 | int err; |
| 240 | |
| 241 | err = jffs2_parse_options(c, data); |
| 242 | if (err) |
| 243 | return -EINVAL; |
| 244 | |
| 245 | return jffs2_do_remount_fs(sb, flags, data); |
| 246 | } |
| 247 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 248 | static const struct super_operations jffs2_super_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | { |
| 250 | .alloc_inode = jffs2_alloc_inode, |
| 251 | .destroy_inode =jffs2_destroy_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | .put_super = jffs2_put_super, |
| 253 | .write_super = jffs2_write_super, |
| 254 | .statfs = jffs2_statfs, |
| 255 | .remount_fs = jffs2_remount_fs, |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 256 | .evict_inode = jffs2_evict_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | .dirty_inode = jffs2_dirty_inode, |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 258 | .show_options = jffs2_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | .sync_fs = jffs2_sync_fs, |
| 260 | }; |
| 261 | |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 262 | /* |
| 263 | * fill in the superblock |
| 264 | */ |
| 265 | static int jffs2_fill_super(struct super_block *sb, void *data, int silent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | struct jffs2_sb_info *c; |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 268 | int ret; |
| 269 | |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 270 | D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():" |
| 271 | " New superblock for device %d (\"%s\")\n", |
| 272 | sb->s_mtd->index, sb->s_mtd->name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Panagiotis Issaris | f8314dc | 2006-09-27 01:49:37 -0700 | [diff] [blame] | 274 | c = kzalloc(sizeof(*c), GFP_KERNEL); |
Arnd Bergmann | 1a028dd | 2010-09-16 16:11:09 +0200 | [diff] [blame] | 275 | if (!c) |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 276 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 278 | c->mtd = sb->s_mtd; |
| 279 | c->os_priv = sb; |
| 280 | sb->s_fs_info = c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Andres Salomon | 92abc47 | 2011-10-16 18:15:16 -0700 | [diff] [blame] | 282 | ret = jffs2_parse_options(c, data); |
| 283 | if (ret) { |
| 284 | kfree(c); |
| 285 | return -EINVAL; |
| 286 | } |
| 287 | |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 288 | /* Initialize JFFS2 superblock locks, the further initialization will |
| 289 | * be done later */ |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 290 | mutex_init(&c->alloc_sem); |
| 291 | mutex_init(&c->erase_free_sem); |
Artem B. Bityuckiy | b622059 | 2005-07-12 17:37:12 +0100 | [diff] [blame] | 292 | init_waitqueue_head(&c->erase_wait); |
| 293 | init_waitqueue_head(&c->inocache_wq); |
| 294 | spin_lock_init(&c->erase_completion_lock); |
| 295 | spin_lock_init(&c->inocache_lock); |
| 296 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | sb->s_op = &jffs2_super_operations; |
David Woodhouse | 5f556aa | 2008-07-31 20:39:25 +0100 | [diff] [blame] | 298 | sb->s_export_op = &jffs2_export_ops; |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 299 | sb->s_flags = sb->s_flags | MS_NOATIME; |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 300 | sb->s_xattr = jffs2_xattr_handlers; |
| 301 | #ifdef CONFIG_JFFS2_FS_POSIX_ACL |
| 302 | sb->s_flags |= MS_POSIXACL; |
| 303 | #endif |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 304 | ret = jffs2_do_fill_super(sb, data, silent); |
Jan Blunck | db71922 | 2010-08-15 22:51:10 +0200 | [diff] [blame] | 305 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | } |
| 307 | |
Al Viro | 848b83a | 2010-07-25 00:56:46 +0400 | [diff] [blame] | 308 | static struct dentry *jffs2_mount(struct file_system_type *fs_type, |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 309 | int flags, const char *dev_name, |
Al Viro | 848b83a | 2010-07-25 00:56:46 +0400 | [diff] [blame] | 310 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | { |
Al Viro | 848b83a | 2010-07-25 00:56:46 +0400 | [diff] [blame] | 312 | return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | } |
| 314 | |
| 315 | static void jffs2_put_super (struct super_block *sb) |
| 316 | { |
| 317 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); |
| 318 | |
| 319 | D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n")); |
| 320 | |
Christoph Hellwig | 8c85e12 | 2009-04-28 18:00:26 +0200 | [diff] [blame] | 321 | if (sb->s_dirt) |
| 322 | jffs2_write_super(sb); |
| 323 | |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 324 | mutex_lock(&c->alloc_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | jffs2_flush_wbuf_pad(c); |
David Woodhouse | ced2207 | 2008-04-22 15:13:40 +0100 | [diff] [blame] | 326 | mutex_unlock(&c->alloc_sem); |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 327 | |
| 328 | jffs2_sum_exit(c); |
| 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | jffs2_free_ino_caches(c); |
| 331 | jffs2_free_raw_node_refs(c); |
Ferenc Havasi | 4ce1f56 | 2005-08-31 14:51:04 +0100 | [diff] [blame] | 332 | if (jffs2_blocks_use_vmalloc(c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | vfree(c->blocks); |
| 334 | else |
| 335 | kfree(c->blocks); |
| 336 | jffs2_flash_cleanup(c); |
| 337 | kfree(c->inocache_list); |
KaiGai Kohei | aa98d7c | 2006-05-13 15:09:47 +0900 | [diff] [blame] | 338 | jffs2_clear_xattr_subsystem(c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (c->mtd->sync) |
| 340 | c->mtd->sync(c->mtd); |
| 341 | |
| 342 | D1(printk(KERN_DEBUG "jffs2_put_super returning\n")); |
| 343 | } |
| 344 | |
| 345 | static void jffs2_kill_sb(struct super_block *sb) |
| 346 | { |
| 347 | struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); |
Artem B. Bityuckiy | a69dde9 | 2005-05-18 12:37:28 +0100 | [diff] [blame] | 348 | if (!(sb->s_flags & MS_RDONLY)) |
| 349 | jffs2_stop_garbage_collect_thread(c); |
David Howells | acaebfd | 2007-05-10 22:51:50 -0700 | [diff] [blame] | 350 | kill_mtd_super(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | kfree(c); |
| 352 | } |
| 353 | |
| 354 | static struct file_system_type jffs2_fs_type = { |
| 355 | .owner = THIS_MODULE, |
| 356 | .name = "jffs2", |
Al Viro | 848b83a | 2010-07-25 00:56:46 +0400 | [diff] [blame] | 357 | .mount = jffs2_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | .kill_sb = jffs2_kill_sb, |
| 359 | }; |
| 360 | |
| 361 | static int __init init_jffs2_fs(void) |
| 362 | { |
| 363 | int ret; |
| 364 | |
David Woodhouse | 3e68fbb | 2006-05-15 00:49:43 +0100 | [diff] [blame] | 365 | /* Paranoia checks for on-medium structures. If we ask GCC |
| 366 | to pack them with __attribute__((packed)) then it _also_ |
| 367 | assumes that they're not aligned -- so it emits crappy |
| 368 | code on some architectures. Ideally we want an attribute |
| 369 | which means just 'no padding', without the alignment |
| 370 | thing. But GCC doesn't have that -- we have to just |
| 371 | hope the structs are the right sizes, instead. */ |
Alexey Dobriyan | 2ecd05a | 2006-10-11 01:22:05 -0700 | [diff] [blame] | 372 | BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12); |
| 373 | BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40); |
| 374 | BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68); |
| 375 | BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32); |
David Woodhouse | 3e68fbb | 2006-05-15 00:49:43 +0100 | [diff] [blame] | 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | printk(KERN_INFO "JFFS2 version 2.2." |
Andrew Victor | 2f82ce1 | 2005-02-09 09:24:26 +0000 | [diff] [blame] | 378 | #ifdef CONFIG_JFFS2_FS_WRITEBUFFER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | " (NAND)" |
| 380 | #endif |
Ferenc Havasi | e631ddb | 2005-09-07 09:35:26 +0100 | [diff] [blame] | 381 | #ifdef CONFIG_JFFS2_SUMMARY |
| 382 | " (SUMMARY) " |
| 383 | #endif |
David Woodhouse | c00c310 | 2007-04-25 14:16:47 +0100 | [diff] [blame] | 384 | " © 2001-2006 Red Hat, Inc.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
| 386 | jffs2_inode_cachep = kmem_cache_create("jffs2_i", |
| 387 | sizeof(struct jffs2_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 388 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 389 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 390 | jffs2_i_init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | if (!jffs2_inode_cachep) { |
| 392 | printk(KERN_ERR "JFFS2 error: Failed to initialise inode cache\n"); |
| 393 | return -ENOMEM; |
| 394 | } |
| 395 | ret = jffs2_compressors_init(); |
| 396 | if (ret) { |
| 397 | printk(KERN_ERR "JFFS2 error: Failed to initialise compressors\n"); |
| 398 | goto out; |
| 399 | } |
| 400 | ret = jffs2_create_slab_caches(); |
| 401 | if (ret) { |
| 402 | printk(KERN_ERR "JFFS2 error: Failed to initialise slab caches\n"); |
| 403 | goto out_compressors; |
| 404 | } |
| 405 | ret = register_filesystem(&jffs2_fs_type); |
| 406 | if (ret) { |
| 407 | printk(KERN_ERR "JFFS2 error: Failed to register filesystem\n"); |
| 408 | goto out_slab; |
| 409 | } |
| 410 | return 0; |
| 411 | |
| 412 | out_slab: |
| 413 | jffs2_destroy_slab_caches(); |
| 414 | out_compressors: |
| 415 | jffs2_compressors_exit(); |
| 416 | out: |
| 417 | kmem_cache_destroy(jffs2_inode_cachep); |
| 418 | return ret; |
| 419 | } |
| 420 | |
| 421 | static void __exit exit_jffs2_fs(void) |
| 422 | { |
| 423 | unregister_filesystem(&jffs2_fs_type); |
| 424 | jffs2_destroy_slab_caches(); |
| 425 | jffs2_compressors_exit(); |
| 426 | kmem_cache_destroy(jffs2_inode_cachep); |
| 427 | } |
| 428 | |
| 429 | module_init(init_jffs2_fs); |
| 430 | module_exit(exit_jffs2_fs); |
| 431 | |
| 432 | MODULE_DESCRIPTION("The Journalling Flash File System, v2"); |
| 433 | MODULE_AUTHOR("Red Hat, Inc."); |
Thomas Gleixner | 182ec4e | 2005-11-07 11:16:07 +0000 | [diff] [blame] | 434 | MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | // the sake of this tag. It's Free Software. |