blob: d86c5e3176a133cd898a62ff8a587010da845385 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * JFFS2 -- Journalling Flash File System, Version 2.
3 *
David Woodhousec00c3102007-04-25 14:16:47 +01004 * Copyright © 2001-2007 Red Hat, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 *
6 * Created by David Woodhouse <dwmw2@infradead.org>
7 *
8 * For licensing information, see the file 'LICENCE' in this directory.
9 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 */
11
Joe Perches5a528952012-02-15 15:56:45 -080012#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/slab.h>
17#include <linux/init.h>
18#include <linux/list.h>
19#include <linux/fs.h>
Artem Bityutskiy9c740342006-10-11 14:52:47 +030020#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/mount.h>
Andres Salomon92abc472011-10-16 18:15:16 -070022#include <linux/parser.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/jffs2.h>
24#include <linux/pagemap.h>
David Howellsacaebfd2007-05-10 22:51:50 -070025#include <linux/mtd/super.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/ctype.h>
27#include <linux/namei.h>
Andres Salomon92abc472011-10-16 18:15:16 -070028#include <linux/seq_file.h>
David Woodhouse5f556aa2008-07-31 20:39:25 +010029#include <linux/exportfs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "compr.h"
31#include "nodelist.h"
32
33static void jffs2_put_super(struct super_block *);
34
Christoph Lametere18b8902006-12-06 20:33:20 -080035static struct kmem_cache *jffs2_inode_cachep;
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37static struct inode *jffs2_alloc_inode(struct super_block *sb)
38{
David Woodhouse4e571ab2008-05-01 12:28:04 +010039 struct jffs2_inode_info *f;
40
41 f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL);
42 if (!f)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 return NULL;
David Woodhouse4e571ab2008-05-01 12:28:04 +010044 return &f->vfs_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}
46
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +110047static void jffs2_i_callback(struct rcu_head *head)
48{
49 struct inode *inode = container_of(head, struct inode, i_rcu);
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +110050 kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
51}
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static void jffs2_destroy_inode(struct inode *inode)
54{
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +110055 call_rcu(&inode->i_rcu, jffs2_i_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056}
57
Alexey Dobriyan51cc5062008-07-25 19:45:34 -070058static void jffs2_i_init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
David Woodhouse4e571ab2008-05-01 12:28:04 +010060 struct jffs2_inode_info *f = foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
David Woodhouse4e571ab2008-05-01 12:28:04 +010062 mutex_init(&f->sem);
63 inode_init_once(&f->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
Andres Salomon92abc472011-10-16 18:15:16 -070066static const char *jffs2_compr_name(unsigned int compr)
67{
68 switch (compr) {
69 case JFFS2_COMPR_MODE_NONE:
70 return "none";
Andres Salomon123005f2011-10-16 18:15:23 -070071#ifdef CONFIG_JFFS2_LZO
72 case JFFS2_COMPR_MODE_FORCELZO:
73 return "lzo";
74#endif
75#ifdef CONFIG_JFFS2_ZLIB
76 case JFFS2_COMPR_MODE_FORCEZLIB:
77 return "zlib";
78#endif
Andres Salomon92abc472011-10-16 18:15:16 -070079 default:
80 /* should never happen; programmer error */
81 WARN_ON(1);
82 return "";
83 }
84}
85
Al Viro34c80b12011-12-08 21:32:45 -050086static int jffs2_show_options(struct seq_file *s, struct dentry *root)
Andres Salomon92abc472011-10-16 18:15:16 -070087{
Al Viro34c80b12011-12-08 21:32:45 -050088 struct jffs2_sb_info *c = JFFS2_SB_INFO(root->d_sb);
Andres Salomon92abc472011-10-16 18:15:16 -070089 struct jffs2_mount_opts *opts = &c->mount_opts;
90
91 if (opts->override_compr)
92 seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr));
Daniel Drake8da8ba22012-04-10 22:22:35 +010093 if (opts->rp_size)
94 seq_printf(s, ",rp_size=%u", opts->rp_size / 1024);
Andres Salomon92abc472011-10-16 18:15:16 -070095
96 return 0;
97}
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static int jffs2_sync_fs(struct super_block *sb, int wait)
100{
101 struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
102
Artem Bityutskiya445f782012-08-23 10:10:07 +0300103#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
104 cancel_delayed_work_sync(&c->wbuf_dwork);
105#endif
106
David Woodhouseced22072008-04-22 15:13:40 +0100107 mutex_lock(&c->alloc_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 jffs2_flush_wbuf_pad(c);
David Woodhouseced22072008-04-22 15:13:40 +0100109 mutex_unlock(&c->alloc_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 return 0;
111}
112
David Woodhouse5f556aa2008-07-31 20:39:25 +0100113static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino,
114 uint32_t generation)
115{
116 /* We don't care about i_generation. We'll destroy the flash
117 before we start re-using inode numbers anyway. And even
118 if that wasn't true, we'd have other problems...*/
119 return jffs2_iget(sb, ino);
120}
121
122static struct dentry *jffs2_fh_to_dentry(struct super_block *sb, struct fid *fid,
123 int fh_len, int fh_type)
124{
125 return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
126 jffs2_nfs_get_inode);
127}
128
129static struct dentry *jffs2_fh_to_parent(struct super_block *sb, struct fid *fid,
130 int fh_len, int fh_type)
131{
132 return generic_fh_to_parent(sb, fid, fh_len, fh_type,
133 jffs2_nfs_get_inode);
134}
135
136static struct dentry *jffs2_get_parent(struct dentry *child)
137{
138 struct jffs2_inode_info *f;
139 uint32_t pino;
140
David Howellse36cb0b2015-01-29 12:02:35 +0000141 BUG_ON(!d_is_dir(child));
David Woodhouse5f556aa2008-07-31 20:39:25 +0100142
David Howells2b0143b2015-03-17 22:25:59 +0000143 f = JFFS2_INODE_INFO(d_inode(child));
David Woodhouse5f556aa2008-07-31 20:39:25 +0100144
145 pino = f->inocache->pino_nlink;
146
147 JFFS2_DEBUG("Parent of directory ino #%u is #%u\n",
148 f->inocache->ino, pino);
149
David Howells2b0143b2015-03-17 22:25:59 +0000150 return d_obtain_alias(jffs2_iget(d_inode(child)->i_sb, pino));
David Woodhouse5f556aa2008-07-31 20:39:25 +0100151}
152
Alexey Dobriyanac4cfdd2009-09-21 17:01:10 -0700153static const struct export_operations jffs2_export_ops = {
David Woodhouse5f556aa2008-07-31 20:39:25 +0100154 .get_parent = jffs2_get_parent,
155 .fh_to_dentry = jffs2_fh_to_dentry,
156 .fh_to_parent = jffs2_fh_to_parent,
157};
158
Andres Salomon92abc472011-10-16 18:15:16 -0700159/*
160 * JFFS2 mount options.
161 *
162 * Opt_override_compr: override default compressor
Daniel Drake8da8ba22012-04-10 22:22:35 +0100163 * Opt_rp_size: size of reserved pool in KiB
Andres Salomon92abc472011-10-16 18:15:16 -0700164 * Opt_err: just end of array marker
165 */
166enum {
167 Opt_override_compr,
Daniel Drake8da8ba22012-04-10 22:22:35 +0100168 Opt_rp_size,
Andres Salomon92abc472011-10-16 18:15:16 -0700169 Opt_err,
170};
171
172static const match_table_t tokens = {
173 {Opt_override_compr, "compr=%s"},
Daniel Drake8da8ba22012-04-10 22:22:35 +0100174 {Opt_rp_size, "rp_size=%u"},
Andres Salomon92abc472011-10-16 18:15:16 -0700175 {Opt_err, NULL},
176};
177
178static int jffs2_parse_options(struct jffs2_sb_info *c, char *data)
179{
180 substring_t args[MAX_OPT_ARGS];
181 char *p, *name;
Daniel Drake8da8ba22012-04-10 22:22:35 +0100182 unsigned int opt;
Andres Salomon92abc472011-10-16 18:15:16 -0700183
184 if (!data)
185 return 0;
186
187 while ((p = strsep(&data, ","))) {
188 int token;
189
190 if (!*p)
191 continue;
192
193 token = match_token(p, tokens, args);
194 switch (token) {
195 case Opt_override_compr:
196 name = match_strdup(&args[0]);
197
198 if (!name)
199 return -ENOMEM;
Andres Salomon123005f2011-10-16 18:15:23 -0700200 if (!strcmp(name, "none"))
Andres Salomon92abc472011-10-16 18:15:16 -0700201 c->mount_opts.compr = JFFS2_COMPR_MODE_NONE;
Andres Salomon123005f2011-10-16 18:15:23 -0700202#ifdef CONFIG_JFFS2_LZO
203 else if (!strcmp(name, "lzo"))
204 c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO;
205#endif
206#ifdef CONFIG_JFFS2_ZLIB
207 else if (!strcmp(name, "zlib"))
208 c->mount_opts.compr =
209 JFFS2_COMPR_MODE_FORCEZLIB;
210#endif
211 else {
Joe Perches5a528952012-02-15 15:56:45 -0800212 pr_err("Error: unknown compressor \"%s\"\n",
Joe Perchesda320f02012-02-15 15:56:44 -0800213 name);
Andres Salomon123005f2011-10-16 18:15:23 -0700214 kfree(name);
215 return -EINVAL;
Andres Salomon92abc472011-10-16 18:15:16 -0700216 }
217 kfree(name);
Andres Salomon123005f2011-10-16 18:15:23 -0700218 c->mount_opts.override_compr = true;
Andres Salomon92abc472011-10-16 18:15:16 -0700219 break;
Daniel Drake8da8ba22012-04-10 22:22:35 +0100220 case Opt_rp_size:
221 if (match_int(&args[0], &opt))
222 return -EINVAL;
223 opt *= 1024;
224 if (opt > c->mtd->size) {
225 pr_warn("Too large reserve pool specified, max "
226 "is %llu KB\n", c->mtd->size / 1024);
227 return -EINVAL;
228 }
229 c->mount_opts.rp_size = opt;
230 break;
Andres Salomon92abc472011-10-16 18:15:16 -0700231 default:
Joe Perches5a528952012-02-15 15:56:45 -0800232 pr_err("Error: unrecognized mount option '%s' or missing value\n",
Joe Perchesda320f02012-02-15 15:56:44 -0800233 p);
Andres Salomon92abc472011-10-16 18:15:16 -0700234 return -EINVAL;
235 }
236 }
237
238 return 0;
239}
240
241static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data)
242{
243 struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
244 int err;
245
Theodore Ts'o02b99842014-03-13 10:14:33 -0400246 sync_filesystem(sb);
Andres Salomon92abc472011-10-16 18:15:16 -0700247 err = jffs2_parse_options(c, data);
248 if (err)
249 return -EINVAL;
250
251 return jffs2_do_remount_fs(sb, flags, data);
252}
253
Josef 'Jeff' Sipekee9b6d62007-02-12 00:55:41 -0800254static const struct super_operations jffs2_super_operations =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
256 .alloc_inode = jffs2_alloc_inode,
257 .destroy_inode =jffs2_destroy_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 .put_super = jffs2_put_super,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 .statfs = jffs2_statfs,
260 .remount_fs = jffs2_remount_fs,
Al Virob57922d2010-06-07 14:34:48 -0400261 .evict_inode = jffs2_evict_inode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 .dirty_inode = jffs2_dirty_inode,
Andres Salomon92abc472011-10-16 18:15:16 -0700263 .show_options = jffs2_show_options,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 .sync_fs = jffs2_sync_fs,
265};
266
David Howellsacaebfd2007-05-10 22:51:50 -0700267/*
268 * fill in the superblock
269 */
270static int jffs2_fill_super(struct super_block *sb, void *data, int silent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 struct jffs2_sb_info *c;
Jan Blunckdb719222010-08-15 22:51:10 +0200273 int ret;
274
Joe Perches9c261b32012-02-15 15:56:43 -0800275 jffs2_dbg(1, "jffs2_get_sb_mtd():"
David Howellsacaebfd2007-05-10 22:51:50 -0700276 " New superblock for device %d (\"%s\")\n",
Joe Perches9c261b32012-02-15 15:56:43 -0800277 sb->s_mtd->index, sb->s_mtd->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Panagiotis Issarisf8314dc2006-09-27 01:49:37 -0700279 c = kzalloc(sizeof(*c), GFP_KERNEL);
Arnd Bergmann1a028dd2010-09-16 16:11:09 +0200280 if (!c)
David Howells454e2392006-06-23 02:02:57 -0700281 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
David Howellsacaebfd2007-05-10 22:51:50 -0700283 c->mtd = sb->s_mtd;
284 c->os_priv = sb;
285 sb->s_fs_info = c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Andres Salomon92abc472011-10-16 18:15:16 -0700287 ret = jffs2_parse_options(c, data);
288 if (ret) {
289 kfree(c);
290 return -EINVAL;
291 }
292
David Howellsacaebfd2007-05-10 22:51:50 -0700293 /* Initialize JFFS2 superblock locks, the further initialization will
294 * be done later */
David Woodhouseced22072008-04-22 15:13:40 +0100295 mutex_init(&c->alloc_sem);
296 mutex_init(&c->erase_free_sem);
Artem B. Bityuckiyb6220592005-07-12 17:37:12 +0100297 init_waitqueue_head(&c->erase_wait);
298 init_waitqueue_head(&c->inocache_wq);
299 spin_lock_init(&c->erase_completion_lock);
300 spin_lock_init(&c->inocache_lock);
301
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 sb->s_op = &jffs2_super_operations;
David Woodhouse5f556aa2008-07-31 20:39:25 +0100303 sb->s_export_op = &jffs2_export_ops;
David Howellsacaebfd2007-05-10 22:51:50 -0700304 sb->s_flags = sb->s_flags | MS_NOATIME;
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900305 sb->s_xattr = jffs2_xattr_handlers;
306#ifdef CONFIG_JFFS2_FS_POSIX_ACL
307 sb->s_flags |= MS_POSIXACL;
308#endif
Jan Blunckdb719222010-08-15 22:51:10 +0200309 ret = jffs2_do_fill_super(sb, data, silent);
Jan Blunckdb719222010-08-15 22:51:10 +0200310 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311}
312
Al Viro848b83a2010-07-25 00:56:46 +0400313static struct dentry *jffs2_mount(struct file_system_type *fs_type,
David Howells454e2392006-06-23 02:02:57 -0700314 int flags, const char *dev_name,
Al Viro848b83a2010-07-25 00:56:46 +0400315 void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
Al Viro848b83a2010-07-25 00:56:46 +0400317 return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
320static void jffs2_put_super (struct super_block *sb)
321{
322 struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
323
Joe Perches9c261b32012-02-15 15:56:43 -0800324 jffs2_dbg(2, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
David Woodhouseced22072008-04-22 15:13:40 +0100326 mutex_lock(&c->alloc_sem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 jffs2_flush_wbuf_pad(c);
David Woodhouseced22072008-04-22 15:13:40 +0100328 mutex_unlock(&c->alloc_sem);
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100329
330 jffs2_sum_exit(c);
331
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 jffs2_free_ino_caches(c);
333 jffs2_free_raw_node_refs(c);
Ferenc Havasi4ce1f562005-08-31 14:51:04 +0100334 if (jffs2_blocks_use_vmalloc(c))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 vfree(c->blocks);
336 else
337 kfree(c->blocks);
338 jffs2_flash_cleanup(c);
339 kfree(c->inocache_list);
KaiGai Koheiaa98d7c2006-05-13 15:09:47 +0900340 jffs2_clear_xattr_subsystem(c);
Artem Bityutskiy327cf292011-12-30 16:35:35 +0200341 mtd_sync(c->mtd);
Joe Perches9c261b32012-02-15 15:56:43 -0800342 jffs2_dbg(1, "%s(): returning\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343}
344
345static void jffs2_kill_sb(struct super_block *sb)
346{
347 struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
Artem B. Bityuckiya69dde92005-05-18 12:37:28 +0100348 if (!(sb->s_flags & MS_RDONLY))
349 jffs2_stop_garbage_collect_thread(c);
David Howellsacaebfd2007-05-10 22:51:50 -0700350 kill_mtd_super(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 kfree(c);
352}
353
354static struct file_system_type jffs2_fs_type = {
355 .owner = THIS_MODULE,
356 .name = "jffs2",
Al Viro848b83a2010-07-25 00:56:46 +0400357 .mount = jffs2_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 .kill_sb = jffs2_kill_sb,
359};
Eric W. Biederman7f78e032013-03-02 19:39:14 -0800360MODULE_ALIAS_FS("jffs2");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
362static int __init init_jffs2_fs(void)
363{
364 int ret;
365
David Woodhouse3e68fbb2006-05-15 00:49:43 +0100366 /* Paranoia checks for on-medium structures. If we ask GCC
367 to pack them with __attribute__((packed)) then it _also_
368 assumes that they're not aligned -- so it emits crappy
369 code on some architectures. Ideally we want an attribute
370 which means just 'no padding', without the alignment
371 thing. But GCC doesn't have that -- we have to just
372 hope the structs are the right sizes, instead. */
Alexey Dobriyan2ecd05a2006-10-11 01:22:05 -0700373 BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12);
374 BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40);
375 BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68);
376 BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32);
David Woodhouse3e68fbb2006-05-15 00:49:43 +0100377
Joe Perches5a528952012-02-15 15:56:45 -0800378 pr_info("version 2.2."
Andrew Victor2f82ce12005-02-09 09:24:26 +0000379#ifdef CONFIG_JFFS2_FS_WRITEBUFFER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 " (NAND)"
381#endif
Ferenc Havasie631ddb2005-09-07 09:35:26 +0100382#ifdef CONFIG_JFFS2_SUMMARY
383 " (SUMMARY) "
384#endif
David Woodhousec00c3102007-04-25 14:16:47 +0100385 " © 2001-2006 Red Hat, Inc.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 jffs2_inode_cachep = kmem_cache_create("jffs2_i",
388 sizeof(struct jffs2_inode_info),
Paul Jacksonfffb60f2006-03-24 03:16:06 -0800389 0, (SLAB_RECLAIM_ACCOUNT|
390 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900391 jffs2_i_init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 if (!jffs2_inode_cachep) {
Joe Perches5a528952012-02-15 15:56:45 -0800393 pr_err("error: Failed to initialise inode cache\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 return -ENOMEM;
395 }
396 ret = jffs2_compressors_init();
397 if (ret) {
Joe Perches5a528952012-02-15 15:56:45 -0800398 pr_err("error: Failed to initialise compressors\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 goto out;
400 }
401 ret = jffs2_create_slab_caches();
402 if (ret) {
Joe Perches5a528952012-02-15 15:56:45 -0800403 pr_err("error: Failed to initialise slab caches\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 goto out_compressors;
405 }
406 ret = register_filesystem(&jffs2_fs_type);
407 if (ret) {
Joe Perches5a528952012-02-15 15:56:45 -0800408 pr_err("error: Failed to register filesystem\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 goto out_slab;
410 }
411 return 0;
412
413 out_slab:
414 jffs2_destroy_slab_caches();
415 out_compressors:
416 jffs2_compressors_exit();
417 out:
418 kmem_cache_destroy(jffs2_inode_cachep);
419 return ret;
420}
421
422static void __exit exit_jffs2_fs(void)
423{
424 unregister_filesystem(&jffs2_fs_type);
425 jffs2_destroy_slab_caches();
426 jffs2_compressors_exit();
Kirill A. Shutemov8c0a8532012-09-26 11:33:07 +1000427
428 /*
429 * Make sure all delayed rcu free inodes are flushed before we
430 * destroy cache.
431 */
432 rcu_barrier();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 kmem_cache_destroy(jffs2_inode_cachep);
434}
435
436module_init(init_jffs2_fs);
437module_exit(exit_jffs2_fs);
438
439MODULE_DESCRIPTION("The Journalling Flash File System, v2");
440MODULE_AUTHOR("Red Hat, Inc.");
Thomas Gleixner182ec4e2005-11-07 11:16:07 +0000441MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 // the sake of this tag. It's Free Software.