11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * JFFS2 -- Journalling Flash File System, Version 2. 31da177e4SLinus Torvalds * 4c00c310eSDavid Woodhouse * Copyright © 2001-2007 Red Hat, Inc. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * Created by David Woodhouse <dwmw2@infradead.org> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * For licensing information, see the file 'LICENCE' in this directory. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds */ 111da177e4SLinus Torvalds 125a528957SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 135a528957SJoe Perches 141da177e4SLinus Torvalds #include <linux/kernel.h> 151da177e4SLinus Torvalds #include <linux/module.h> 161da177e4SLinus Torvalds #include <linux/slab.h> 171da177e4SLinus Torvalds #include <linux/init.h> 181da177e4SLinus Torvalds #include <linux/list.h> 191da177e4SLinus Torvalds #include <linux/fs.h> 209c74034fSArtem Bityutskiy #include <linux/err.h> 211da177e4SLinus Torvalds #include <linux/mount.h> 2292abc475SAndres Salomon #include <linux/parser.h> 231da177e4SLinus Torvalds #include <linux/jffs2.h> 241da177e4SLinus Torvalds #include <linux/pagemap.h> 25acaebfd8SDavid Howells #include <linux/mtd/super.h> 261da177e4SLinus Torvalds #include <linux/ctype.h> 271da177e4SLinus Torvalds #include <linux/namei.h> 2892abc475SAndres Salomon #include <linux/seq_file.h> 295f556aabSDavid Woodhouse #include <linux/exportfs.h> 301da177e4SLinus Torvalds #include "compr.h" 311da177e4SLinus Torvalds #include "nodelist.h" 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds static void jffs2_put_super(struct super_block *); 341da177e4SLinus Torvalds 35e18b890bSChristoph Lameter static struct kmem_cache *jffs2_inode_cachep; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static struct inode *jffs2_alloc_inode(struct super_block *sb) 381da177e4SLinus Torvalds { 394e571abaSDavid Woodhouse struct jffs2_inode_info *f; 404e571abaSDavid Woodhouse 414e571abaSDavid Woodhouse f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); 424e571abaSDavid Woodhouse if (!f) 431da177e4SLinus Torvalds return NULL; 444e571abaSDavid Woodhouse return &f->vfs_inode; 451da177e4SLinus Torvalds } 461da177e4SLinus Torvalds 47fa0d7e3dSNick Piggin static void jffs2_i_callback(struct rcu_head *head) 48fa0d7e3dSNick Piggin { 49fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 50fa0d7e3dSNick Piggin kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode)); 51fa0d7e3dSNick Piggin } 52fa0d7e3dSNick Piggin 531da177e4SLinus Torvalds static void jffs2_destroy_inode(struct inode *inode) 541da177e4SLinus Torvalds { 55fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, jffs2_i_callback); 561da177e4SLinus Torvalds } 571da177e4SLinus Torvalds 5851cc5068SAlexey Dobriyan static void jffs2_i_init_once(void *foo) 591da177e4SLinus Torvalds { 604e571abaSDavid Woodhouse struct jffs2_inode_info *f = foo; 611da177e4SLinus Torvalds 624e571abaSDavid Woodhouse mutex_init(&f->sem); 634e571abaSDavid Woodhouse inode_init_once(&f->vfs_inode); 641da177e4SLinus Torvalds } 651da177e4SLinus Torvalds 6692abc475SAndres Salomon static const char *jffs2_compr_name(unsigned int compr) 6792abc475SAndres Salomon { 6892abc475SAndres Salomon switch (compr) { 6992abc475SAndres Salomon case JFFS2_COMPR_MODE_NONE: 7092abc475SAndres Salomon return "none"; 71123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 72123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCELZO: 73123005f3SAndres Salomon return "lzo"; 74123005f3SAndres Salomon #endif 75123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 76123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCEZLIB: 77123005f3SAndres Salomon return "zlib"; 78123005f3SAndres Salomon #endif 7992abc475SAndres Salomon default: 8092abc475SAndres Salomon /* should never happen; programmer error */ 8192abc475SAndres Salomon WARN_ON(1); 8292abc475SAndres Salomon return ""; 8392abc475SAndres Salomon } 8492abc475SAndres Salomon } 8592abc475SAndres Salomon 8634c80b1dSAl Viro static int jffs2_show_options(struct seq_file *s, struct dentry *root) 8792abc475SAndres Salomon { 8834c80b1dSAl Viro struct jffs2_sb_info *c = JFFS2_SB_INFO(root->d_sb); 8992abc475SAndres Salomon struct jffs2_mount_opts *opts = &c->mount_opts; 9092abc475SAndres Salomon 9192abc475SAndres Salomon if (opts->override_compr) 9292abc475SAndres Salomon seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr)); 938da8ba2eSDaniel Drake if (opts->rp_size) 948da8ba2eSDaniel Drake seq_printf(s, ",rp_size=%u", opts->rp_size / 1024); 9592abc475SAndres Salomon 9692abc475SAndres Salomon return 0; 9792abc475SAndres Salomon } 9892abc475SAndres Salomon 991da177e4SLinus Torvalds static int jffs2_sync_fs(struct super_block *sb, int wait) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 1021da177e4SLinus Torvalds 103a445f784SArtem Bityutskiy #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 104a445f784SArtem Bityutskiy cancel_delayed_work_sync(&c->wbuf_dwork); 105a445f784SArtem Bityutskiy #endif 106a445f784SArtem Bityutskiy 107ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 1081da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 109ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 1101da177e4SLinus Torvalds return 0; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1135f556aabSDavid Woodhouse static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, 1145f556aabSDavid Woodhouse uint32_t generation) 1155f556aabSDavid Woodhouse { 1165f556aabSDavid Woodhouse /* We don't care about i_generation. We'll destroy the flash 1175f556aabSDavid Woodhouse before we start re-using inode numbers anyway. And even 1185f556aabSDavid Woodhouse if that wasn't true, we'd have other problems...*/ 1195f556aabSDavid Woodhouse return jffs2_iget(sb, ino); 1205f556aabSDavid Woodhouse } 1215f556aabSDavid Woodhouse 1225f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, 1235f556aabSDavid Woodhouse int fh_len, int fh_type) 1245f556aabSDavid Woodhouse { 1255f556aabSDavid Woodhouse return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 1265f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1275f556aabSDavid Woodhouse } 1285f556aabSDavid Woodhouse 1295f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_parent(struct super_block *sb, struct fid *fid, 1305f556aabSDavid Woodhouse int fh_len, int fh_type) 1315f556aabSDavid Woodhouse { 1325f556aabSDavid Woodhouse return generic_fh_to_parent(sb, fid, fh_len, fh_type, 1335f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1345f556aabSDavid Woodhouse } 1355f556aabSDavid Woodhouse 1365f556aabSDavid Woodhouse static struct dentry *jffs2_get_parent(struct dentry *child) 1375f556aabSDavid Woodhouse { 1385f556aabSDavid Woodhouse struct jffs2_inode_info *f; 1395f556aabSDavid Woodhouse uint32_t pino; 1405f556aabSDavid Woodhouse 141e36cb0b8SDavid Howells BUG_ON(!d_is_dir(child)); 1425f556aabSDavid Woodhouse 1432b0143b5SDavid Howells f = JFFS2_INODE_INFO(d_inode(child)); 1445f556aabSDavid Woodhouse 1455f556aabSDavid Woodhouse pino = f->inocache->pino_nlink; 1465f556aabSDavid Woodhouse 1475f556aabSDavid Woodhouse JFFS2_DEBUG("Parent of directory ino #%u is #%u\n", 1485f556aabSDavid Woodhouse f->inocache->ino, pino); 1495f556aabSDavid Woodhouse 150*fc64005cSAl Viro return d_obtain_alias(jffs2_iget(child->d_sb, pino)); 1515f556aabSDavid Woodhouse } 1525f556aabSDavid Woodhouse 153ac4cfdd6SAlexey Dobriyan static const struct export_operations jffs2_export_ops = { 1545f556aabSDavid Woodhouse .get_parent = jffs2_get_parent, 1555f556aabSDavid Woodhouse .fh_to_dentry = jffs2_fh_to_dentry, 1565f556aabSDavid Woodhouse .fh_to_parent = jffs2_fh_to_parent, 1575f556aabSDavid Woodhouse }; 1585f556aabSDavid Woodhouse 15992abc475SAndres Salomon /* 16092abc475SAndres Salomon * JFFS2 mount options. 16192abc475SAndres Salomon * 16292abc475SAndres Salomon * Opt_override_compr: override default compressor 1638da8ba2eSDaniel Drake * Opt_rp_size: size of reserved pool in KiB 16492abc475SAndres Salomon * Opt_err: just end of array marker 16592abc475SAndres Salomon */ 16692abc475SAndres Salomon enum { 16792abc475SAndres Salomon Opt_override_compr, 1688da8ba2eSDaniel Drake Opt_rp_size, 16992abc475SAndres Salomon Opt_err, 17092abc475SAndres Salomon }; 17192abc475SAndres Salomon 17292abc475SAndres Salomon static const match_table_t tokens = { 17392abc475SAndres Salomon {Opt_override_compr, "compr=%s"}, 1748da8ba2eSDaniel Drake {Opt_rp_size, "rp_size=%u"}, 17592abc475SAndres Salomon {Opt_err, NULL}, 17692abc475SAndres Salomon }; 17792abc475SAndres Salomon 17892abc475SAndres Salomon static int jffs2_parse_options(struct jffs2_sb_info *c, char *data) 17992abc475SAndres Salomon { 18092abc475SAndres Salomon substring_t args[MAX_OPT_ARGS]; 18192abc475SAndres Salomon char *p, *name; 1828da8ba2eSDaniel Drake unsigned int opt; 18392abc475SAndres Salomon 18492abc475SAndres Salomon if (!data) 18592abc475SAndres Salomon return 0; 18692abc475SAndres Salomon 18792abc475SAndres Salomon while ((p = strsep(&data, ","))) { 18892abc475SAndres Salomon int token; 18992abc475SAndres Salomon 19092abc475SAndres Salomon if (!*p) 19192abc475SAndres Salomon continue; 19292abc475SAndres Salomon 19392abc475SAndres Salomon token = match_token(p, tokens, args); 19492abc475SAndres Salomon switch (token) { 19592abc475SAndres Salomon case Opt_override_compr: 19692abc475SAndres Salomon name = match_strdup(&args[0]); 19792abc475SAndres Salomon 19892abc475SAndres Salomon if (!name) 19992abc475SAndres Salomon return -ENOMEM; 200123005f3SAndres Salomon if (!strcmp(name, "none")) 20192abc475SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_NONE; 202123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 203123005f3SAndres Salomon else if (!strcmp(name, "lzo")) 204123005f3SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO; 205123005f3SAndres Salomon #endif 206123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 207123005f3SAndres Salomon else if (!strcmp(name, "zlib")) 208123005f3SAndres Salomon c->mount_opts.compr = 209123005f3SAndres Salomon JFFS2_COMPR_MODE_FORCEZLIB; 210123005f3SAndres Salomon #endif 211123005f3SAndres Salomon else { 2125a528957SJoe Perches pr_err("Error: unknown compressor \"%s\"\n", 213123005f3SAndres Salomon name); 214123005f3SAndres Salomon kfree(name); 215123005f3SAndres Salomon return -EINVAL; 21692abc475SAndres Salomon } 21792abc475SAndres Salomon kfree(name); 218123005f3SAndres Salomon c->mount_opts.override_compr = true; 21992abc475SAndres Salomon break; 2208da8ba2eSDaniel Drake case Opt_rp_size: 2218da8ba2eSDaniel Drake if (match_int(&args[0], &opt)) 2228da8ba2eSDaniel Drake return -EINVAL; 2238da8ba2eSDaniel Drake opt *= 1024; 2248da8ba2eSDaniel Drake if (opt > c->mtd->size) { 2258da8ba2eSDaniel Drake pr_warn("Too large reserve pool specified, max " 2268da8ba2eSDaniel Drake "is %llu KB\n", c->mtd->size / 1024); 2278da8ba2eSDaniel Drake return -EINVAL; 2288da8ba2eSDaniel Drake } 2298da8ba2eSDaniel Drake c->mount_opts.rp_size = opt; 2308da8ba2eSDaniel Drake break; 23192abc475SAndres Salomon default: 2325a528957SJoe Perches pr_err("Error: unrecognized mount option '%s' or missing value\n", 23392abc475SAndres Salomon p); 23492abc475SAndres Salomon return -EINVAL; 23592abc475SAndres Salomon } 23692abc475SAndres Salomon } 23792abc475SAndres Salomon 23892abc475SAndres Salomon return 0; 23992abc475SAndres Salomon } 24092abc475SAndres Salomon 24192abc475SAndres Salomon static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data) 24292abc475SAndres Salomon { 24392abc475SAndres Salomon struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 24492abc475SAndres Salomon int err; 24592abc475SAndres Salomon 24602b9984dSTheodore Ts'o sync_filesystem(sb); 24792abc475SAndres Salomon err = jffs2_parse_options(c, data); 24892abc475SAndres Salomon if (err) 24992abc475SAndres Salomon return -EINVAL; 25092abc475SAndres Salomon 25192abc475SAndres Salomon return jffs2_do_remount_fs(sb, flags, data); 25292abc475SAndres Salomon } 25392abc475SAndres Salomon 254ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations jffs2_super_operations = 2551da177e4SLinus Torvalds { 2561da177e4SLinus Torvalds .alloc_inode = jffs2_alloc_inode, 2571da177e4SLinus Torvalds .destroy_inode =jffs2_destroy_inode, 2581da177e4SLinus Torvalds .put_super = jffs2_put_super, 2591da177e4SLinus Torvalds .statfs = jffs2_statfs, 2601da177e4SLinus Torvalds .remount_fs = jffs2_remount_fs, 261b57922d9SAl Viro .evict_inode = jffs2_evict_inode, 2621da177e4SLinus Torvalds .dirty_inode = jffs2_dirty_inode, 26392abc475SAndres Salomon .show_options = jffs2_show_options, 2641da177e4SLinus Torvalds .sync_fs = jffs2_sync_fs, 2651da177e4SLinus Torvalds }; 2661da177e4SLinus Torvalds 267acaebfd8SDavid Howells /* 268acaebfd8SDavid Howells * fill in the superblock 269acaebfd8SDavid Howells */ 270acaebfd8SDavid Howells static int jffs2_fill_super(struct super_block *sb, void *data, int silent) 2711da177e4SLinus Torvalds { 2721da177e4SLinus Torvalds struct jffs2_sb_info *c; 273db719222SJan Blunck int ret; 274db719222SJan Blunck 2759c261b33SJoe Perches jffs2_dbg(1, "jffs2_get_sb_mtd():" 276acaebfd8SDavid Howells " New superblock for device %d (\"%s\")\n", 2779c261b33SJoe Perches sb->s_mtd->index, sb->s_mtd->name); 2781da177e4SLinus Torvalds 279f8314dc6SPanagiotis Issaris c = kzalloc(sizeof(*c), GFP_KERNEL); 2801a028dd2SArnd Bergmann if (!c) 281454e2398SDavid Howells return -ENOMEM; 2821da177e4SLinus Torvalds 283acaebfd8SDavid Howells c->mtd = sb->s_mtd; 284acaebfd8SDavid Howells c->os_priv = sb; 285acaebfd8SDavid Howells sb->s_fs_info = c; 2861da177e4SLinus Torvalds 28792abc475SAndres Salomon ret = jffs2_parse_options(c, data); 28892abc475SAndres Salomon if (ret) { 28992abc475SAndres Salomon kfree(c); 29092abc475SAndres Salomon return -EINVAL; 29192abc475SAndres Salomon } 29292abc475SAndres Salomon 293acaebfd8SDavid Howells /* Initialize JFFS2 superblock locks, the further initialization will 294acaebfd8SDavid Howells * be done later */ 295ced22070SDavid Woodhouse mutex_init(&c->alloc_sem); 296ced22070SDavid Woodhouse mutex_init(&c->erase_free_sem); 297b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->erase_wait); 298b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->inocache_wq); 299b6220598SArtem B. Bityuckiy spin_lock_init(&c->erase_completion_lock); 300b6220598SArtem B. Bityuckiy spin_lock_init(&c->inocache_lock); 301b6220598SArtem B. Bityuckiy 3021da177e4SLinus Torvalds sb->s_op = &jffs2_super_operations; 3035f556aabSDavid Woodhouse sb->s_export_op = &jffs2_export_ops; 304acaebfd8SDavid Howells sb->s_flags = sb->s_flags | MS_NOATIME; 305aa98d7cfSKaiGai Kohei sb->s_xattr = jffs2_xattr_handlers; 306aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 307aa98d7cfSKaiGai Kohei sb->s_flags |= MS_POSIXACL; 308aa98d7cfSKaiGai Kohei #endif 309db719222SJan Blunck ret = jffs2_do_fill_super(sb, data, silent); 310db719222SJan Blunck return ret; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds 313848b83a5SAl Viro static struct dentry *jffs2_mount(struct file_system_type *fs_type, 3141da177e4SLinus Torvalds int flags, const char *dev_name, 315848b83a5SAl Viro void *data) 3161da177e4SLinus Torvalds { 317848b83a5SAl Viro return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super); 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds static void jffs2_put_super (struct super_block *sb) 3211da177e4SLinus Torvalds { 3221da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 3231da177e4SLinus Torvalds 3249c261b33SJoe Perches jffs2_dbg(2, "%s()\n", __func__); 3251da177e4SLinus Torvalds 326ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 3271da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 328ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 329e631ddbaSFerenc Havasi 330e631ddbaSFerenc Havasi jffs2_sum_exit(c); 331e631ddbaSFerenc Havasi 3321da177e4SLinus Torvalds jffs2_free_ino_caches(c); 3331da177e4SLinus Torvalds jffs2_free_raw_node_refs(c); 3341d5cfdb0STetsuo Handa kvfree(c->blocks); 3351da177e4SLinus Torvalds jffs2_flash_cleanup(c); 3361da177e4SLinus Torvalds kfree(c->inocache_list); 337aa98d7cfSKaiGai Kohei jffs2_clear_xattr_subsystem(c); 33885f2f2a8SArtem Bityutskiy mtd_sync(c->mtd); 3399c261b33SJoe Perches jffs2_dbg(1, "%s(): returning\n", __func__); 3401da177e4SLinus Torvalds } 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds static void jffs2_kill_sb(struct super_block *sb) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 345a69dde91SArtem B. Bityuckiy if (!(sb->s_flags & MS_RDONLY)) 346a69dde91SArtem B. Bityuckiy jffs2_stop_garbage_collect_thread(c); 347acaebfd8SDavid Howells kill_mtd_super(sb); 3481da177e4SLinus Torvalds kfree(c); 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 3511da177e4SLinus Torvalds static struct file_system_type jffs2_fs_type = { 3521da177e4SLinus Torvalds .owner = THIS_MODULE, 3531da177e4SLinus Torvalds .name = "jffs2", 354848b83a5SAl Viro .mount = jffs2_mount, 3551da177e4SLinus Torvalds .kill_sb = jffs2_kill_sb, 3561da177e4SLinus Torvalds }; 3577f78e035SEric W. Biederman MODULE_ALIAS_FS("jffs2"); 3581da177e4SLinus Torvalds 3591da177e4SLinus Torvalds static int __init init_jffs2_fs(void) 3601da177e4SLinus Torvalds { 3611da177e4SLinus Torvalds int ret; 3621da177e4SLinus Torvalds 3633e68fbb5SDavid Woodhouse /* Paranoia checks for on-medium structures. If we ask GCC 3643e68fbb5SDavid Woodhouse to pack them with __attribute__((packed)) then it _also_ 3653e68fbb5SDavid Woodhouse assumes that they're not aligned -- so it emits crappy 3663e68fbb5SDavid Woodhouse code on some architectures. Ideally we want an attribute 3673e68fbb5SDavid Woodhouse which means just 'no padding', without the alignment 3683e68fbb5SDavid Woodhouse thing. But GCC doesn't have that -- we have to just 3693e68fbb5SDavid Woodhouse hope the structs are the right sizes, instead. */ 3702ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12); 3712ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40); 3722ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68); 3732ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32); 3743e68fbb5SDavid Woodhouse 3755a528957SJoe Perches pr_info("version 2.2." 3762f82ce1eSAndrew Victor #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 3771da177e4SLinus Torvalds " (NAND)" 3781da177e4SLinus Torvalds #endif 379e631ddbaSFerenc Havasi #ifdef CONFIG_JFFS2_SUMMARY 380e631ddbaSFerenc Havasi " (SUMMARY) " 381e631ddbaSFerenc Havasi #endif 382c00c310eSDavid Woodhouse " © 2001-2006 Red Hat, Inc.\n"); 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds jffs2_inode_cachep = kmem_cache_create("jffs2_i", 3851da177e4SLinus Torvalds sizeof(struct jffs2_inode_info), 386fffb60f9SPaul Jackson 0, (SLAB_RECLAIM_ACCOUNT| 3875d097056SVladimir Davydov SLAB_MEM_SPREAD|SLAB_ACCOUNT), 38820c2df83SPaul Mundt jffs2_i_init_once); 3891da177e4SLinus Torvalds if (!jffs2_inode_cachep) { 3905a528957SJoe Perches pr_err("error: Failed to initialise inode cache\n"); 3911da177e4SLinus Torvalds return -ENOMEM; 3921da177e4SLinus Torvalds } 3931da177e4SLinus Torvalds ret = jffs2_compressors_init(); 3941da177e4SLinus Torvalds if (ret) { 3955a528957SJoe Perches pr_err("error: Failed to initialise compressors\n"); 3961da177e4SLinus Torvalds goto out; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds ret = jffs2_create_slab_caches(); 3991da177e4SLinus Torvalds if (ret) { 4005a528957SJoe Perches pr_err("error: Failed to initialise slab caches\n"); 4011da177e4SLinus Torvalds goto out_compressors; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds ret = register_filesystem(&jffs2_fs_type); 4041da177e4SLinus Torvalds if (ret) { 4055a528957SJoe Perches pr_err("error: Failed to register filesystem\n"); 4061da177e4SLinus Torvalds goto out_slab; 4071da177e4SLinus Torvalds } 4081da177e4SLinus Torvalds return 0; 4091da177e4SLinus Torvalds 4101da177e4SLinus Torvalds out_slab: 4111da177e4SLinus Torvalds jffs2_destroy_slab_caches(); 4121da177e4SLinus Torvalds out_compressors: 4131da177e4SLinus Torvalds jffs2_compressors_exit(); 4141da177e4SLinus Torvalds out: 4151da177e4SLinus Torvalds kmem_cache_destroy(jffs2_inode_cachep); 4161da177e4SLinus Torvalds return ret; 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds 4191da177e4SLinus Torvalds static void __exit exit_jffs2_fs(void) 4201da177e4SLinus Torvalds { 4211da177e4SLinus Torvalds unregister_filesystem(&jffs2_fs_type); 4221da177e4SLinus Torvalds jffs2_destroy_slab_caches(); 4231da177e4SLinus Torvalds jffs2_compressors_exit(); 4248c0a8537SKirill A. Shutemov 4258c0a8537SKirill A. Shutemov /* 4268c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 4278c0a8537SKirill A. Shutemov * destroy cache. 4288c0a8537SKirill A. Shutemov */ 4298c0a8537SKirill A. Shutemov rcu_barrier(); 4301da177e4SLinus Torvalds kmem_cache_destroy(jffs2_inode_cachep); 4311da177e4SLinus Torvalds } 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds module_init(init_jffs2_fs); 4341da177e4SLinus Torvalds module_exit(exit_jffs2_fs); 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds MODULE_DESCRIPTION("The Journalling Flash File System, v2"); 4371da177e4SLinus Torvalds MODULE_AUTHOR("Red Hat, Inc."); 4381da177e4SLinus Torvalds MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for 4391da177e4SLinus Torvalds // the sake of this tag. It's Free Software. 440