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 6601ba6875SChristoph Hellwig static void jffs2_write_super(struct super_block *sb) 6701ba6875SChristoph Hellwig { 6801ba6875SChristoph Hellwig struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 69ebc1ac16SChristoph Hellwig 70ebc1ac16SChristoph Hellwig lock_super(sb); 7101ba6875SChristoph Hellwig sb->s_dirt = 0; 7201ba6875SChristoph Hellwig 73ebc1ac16SChristoph Hellwig if (!(sb->s_flags & MS_RDONLY)) { 749c261b33SJoe Perches jffs2_dbg(1, "%s()\n", __func__); 7501ba6875SChristoph Hellwig jffs2_flush_wbuf_gc(c, 0); 7601ba6875SChristoph Hellwig } 7701ba6875SChristoph Hellwig 78ebc1ac16SChristoph Hellwig unlock_super(sb); 79ebc1ac16SChristoph Hellwig } 80ebc1ac16SChristoph Hellwig 8192abc475SAndres Salomon static const char *jffs2_compr_name(unsigned int compr) 8292abc475SAndres Salomon { 8392abc475SAndres Salomon switch (compr) { 8492abc475SAndres Salomon case JFFS2_COMPR_MODE_NONE: 8592abc475SAndres Salomon return "none"; 86123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 87123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCELZO: 88123005f3SAndres Salomon return "lzo"; 89123005f3SAndres Salomon #endif 90123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 91123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCEZLIB: 92123005f3SAndres Salomon return "zlib"; 93123005f3SAndres Salomon #endif 9492abc475SAndres Salomon default: 9592abc475SAndres Salomon /* should never happen; programmer error */ 9692abc475SAndres Salomon WARN_ON(1); 9792abc475SAndres Salomon return ""; 9892abc475SAndres Salomon } 9992abc475SAndres Salomon } 10092abc475SAndres Salomon 10134c80b1dSAl Viro static int jffs2_show_options(struct seq_file *s, struct dentry *root) 10292abc475SAndres Salomon { 10334c80b1dSAl Viro struct jffs2_sb_info *c = JFFS2_SB_INFO(root->d_sb); 10492abc475SAndres Salomon struct jffs2_mount_opts *opts = &c->mount_opts; 10592abc475SAndres Salomon 10692abc475SAndres Salomon if (opts->override_compr) 10792abc475SAndres Salomon seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr)); 10892abc475SAndres Salomon 10992abc475SAndres Salomon return 0; 11092abc475SAndres Salomon } 11192abc475SAndres Salomon 1121da177e4SLinus Torvalds static int jffs2_sync_fs(struct super_block *sb, int wait) 1131da177e4SLinus Torvalds { 1141da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 1151da177e4SLinus Torvalds 116d579ed00SChristoph Hellwig jffs2_write_super(sb); 117d579ed00SChristoph Hellwig 118ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 1191da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 120ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 1211da177e4SLinus Torvalds return 0; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1245f556aabSDavid Woodhouse static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, 1255f556aabSDavid Woodhouse uint32_t generation) 1265f556aabSDavid Woodhouse { 1275f556aabSDavid Woodhouse /* We don't care about i_generation. We'll destroy the flash 1285f556aabSDavid Woodhouse before we start re-using inode numbers anyway. And even 1295f556aabSDavid Woodhouse if that wasn't true, we'd have other problems...*/ 1305f556aabSDavid Woodhouse return jffs2_iget(sb, ino); 1315f556aabSDavid Woodhouse } 1325f556aabSDavid Woodhouse 1335f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, 1345f556aabSDavid Woodhouse int fh_len, int fh_type) 1355f556aabSDavid Woodhouse { 1365f556aabSDavid Woodhouse return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 1375f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1385f556aabSDavid Woodhouse } 1395f556aabSDavid Woodhouse 1405f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_parent(struct super_block *sb, struct fid *fid, 1415f556aabSDavid Woodhouse int fh_len, int fh_type) 1425f556aabSDavid Woodhouse { 1435f556aabSDavid Woodhouse return generic_fh_to_parent(sb, fid, fh_len, fh_type, 1445f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1455f556aabSDavid Woodhouse } 1465f556aabSDavid Woodhouse 1475f556aabSDavid Woodhouse static struct dentry *jffs2_get_parent(struct dentry *child) 1485f556aabSDavid Woodhouse { 1495f556aabSDavid Woodhouse struct jffs2_inode_info *f; 1505f556aabSDavid Woodhouse uint32_t pino; 1515f556aabSDavid Woodhouse 1525f556aabSDavid Woodhouse BUG_ON(!S_ISDIR(child->d_inode->i_mode)); 1535f556aabSDavid Woodhouse 1545f556aabSDavid Woodhouse f = JFFS2_INODE_INFO(child->d_inode); 1555f556aabSDavid Woodhouse 1565f556aabSDavid Woodhouse pino = f->inocache->pino_nlink; 1575f556aabSDavid Woodhouse 1585f556aabSDavid Woodhouse JFFS2_DEBUG("Parent of directory ino #%u is #%u\n", 1595f556aabSDavid Woodhouse f->inocache->ino, pino); 1605f556aabSDavid Woodhouse 1615f556aabSDavid Woodhouse return d_obtain_alias(jffs2_iget(child->d_inode->i_sb, pino)); 1625f556aabSDavid Woodhouse } 1635f556aabSDavid Woodhouse 164ac4cfdd6SAlexey Dobriyan static const struct export_operations jffs2_export_ops = { 1655f556aabSDavid Woodhouse .get_parent = jffs2_get_parent, 1665f556aabSDavid Woodhouse .fh_to_dentry = jffs2_fh_to_dentry, 1675f556aabSDavid Woodhouse .fh_to_parent = jffs2_fh_to_parent, 1685f556aabSDavid Woodhouse }; 1695f556aabSDavid Woodhouse 17092abc475SAndres Salomon /* 17192abc475SAndres Salomon * JFFS2 mount options. 17292abc475SAndres Salomon * 17392abc475SAndres Salomon * Opt_override_compr: override default compressor 17492abc475SAndres Salomon * Opt_err: just end of array marker 17592abc475SAndres Salomon */ 17692abc475SAndres Salomon enum { 17792abc475SAndres Salomon Opt_override_compr, 17892abc475SAndres Salomon Opt_err, 17992abc475SAndres Salomon }; 18092abc475SAndres Salomon 18192abc475SAndres Salomon static const match_table_t tokens = { 18292abc475SAndres Salomon {Opt_override_compr, "compr=%s"}, 18392abc475SAndres Salomon {Opt_err, NULL}, 18492abc475SAndres Salomon }; 18592abc475SAndres Salomon 18692abc475SAndres Salomon static int jffs2_parse_options(struct jffs2_sb_info *c, char *data) 18792abc475SAndres Salomon { 18892abc475SAndres Salomon substring_t args[MAX_OPT_ARGS]; 18992abc475SAndres Salomon char *p, *name; 19092abc475SAndres Salomon 19192abc475SAndres Salomon if (!data) 19292abc475SAndres Salomon return 0; 19392abc475SAndres Salomon 19492abc475SAndres Salomon while ((p = strsep(&data, ","))) { 19592abc475SAndres Salomon int token; 19692abc475SAndres Salomon 19792abc475SAndres Salomon if (!*p) 19892abc475SAndres Salomon continue; 19992abc475SAndres Salomon 20092abc475SAndres Salomon token = match_token(p, tokens, args); 20192abc475SAndres Salomon switch (token) { 20292abc475SAndres Salomon case Opt_override_compr: 20392abc475SAndres Salomon name = match_strdup(&args[0]); 20492abc475SAndres Salomon 20592abc475SAndres Salomon if (!name) 20692abc475SAndres Salomon return -ENOMEM; 207123005f3SAndres Salomon if (!strcmp(name, "none")) 20892abc475SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_NONE; 209123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 210123005f3SAndres Salomon else if (!strcmp(name, "lzo")) 211123005f3SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO; 212123005f3SAndres Salomon #endif 213123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 214123005f3SAndres Salomon else if (!strcmp(name, "zlib")) 215123005f3SAndres Salomon c->mount_opts.compr = 216123005f3SAndres Salomon JFFS2_COMPR_MODE_FORCEZLIB; 217123005f3SAndres Salomon #endif 218123005f3SAndres Salomon else { 2195a528957SJoe Perches pr_err("Error: unknown compressor \"%s\"\n", 220123005f3SAndres Salomon name); 221123005f3SAndres Salomon kfree(name); 222123005f3SAndres Salomon return -EINVAL; 22392abc475SAndres Salomon } 22492abc475SAndres Salomon kfree(name); 225123005f3SAndres Salomon c->mount_opts.override_compr = true; 22692abc475SAndres Salomon break; 22792abc475SAndres Salomon default: 2285a528957SJoe Perches pr_err("Error: unrecognized mount option '%s' or missing value\n", 22992abc475SAndres Salomon p); 23092abc475SAndres Salomon return -EINVAL; 23192abc475SAndres Salomon } 23292abc475SAndres Salomon } 23392abc475SAndres Salomon 23492abc475SAndres Salomon return 0; 23592abc475SAndres Salomon } 23692abc475SAndres Salomon 23792abc475SAndres Salomon static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data) 23892abc475SAndres Salomon { 23992abc475SAndres Salomon struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 24092abc475SAndres Salomon int err; 24192abc475SAndres Salomon 24292abc475SAndres Salomon err = jffs2_parse_options(c, data); 24392abc475SAndres Salomon if (err) 24492abc475SAndres Salomon return -EINVAL; 24592abc475SAndres Salomon 24692abc475SAndres Salomon return jffs2_do_remount_fs(sb, flags, data); 24792abc475SAndres Salomon } 24892abc475SAndres Salomon 249ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations jffs2_super_operations = 2501da177e4SLinus Torvalds { 2511da177e4SLinus Torvalds .alloc_inode = jffs2_alloc_inode, 2521da177e4SLinus Torvalds .destroy_inode =jffs2_destroy_inode, 2531da177e4SLinus Torvalds .put_super = jffs2_put_super, 2541da177e4SLinus Torvalds .write_super = jffs2_write_super, 2551da177e4SLinus Torvalds .statfs = jffs2_statfs, 2561da177e4SLinus Torvalds .remount_fs = jffs2_remount_fs, 257b57922d9SAl Viro .evict_inode = jffs2_evict_inode, 2581da177e4SLinus Torvalds .dirty_inode = jffs2_dirty_inode, 25992abc475SAndres Salomon .show_options = jffs2_show_options, 2601da177e4SLinus Torvalds .sync_fs = jffs2_sync_fs, 2611da177e4SLinus Torvalds }; 2621da177e4SLinus Torvalds 263acaebfd8SDavid Howells /* 264acaebfd8SDavid Howells * fill in the superblock 265acaebfd8SDavid Howells */ 266acaebfd8SDavid Howells static int jffs2_fill_super(struct super_block *sb, void *data, int silent) 2671da177e4SLinus Torvalds { 2681da177e4SLinus Torvalds struct jffs2_sb_info *c; 269db719222SJan Blunck int ret; 270db719222SJan Blunck 2719c261b33SJoe Perches jffs2_dbg(1, "jffs2_get_sb_mtd():" 272acaebfd8SDavid Howells " New superblock for device %d (\"%s\")\n", 2739c261b33SJoe Perches sb->s_mtd->index, sb->s_mtd->name); 2741da177e4SLinus Torvalds 275f8314dc6SPanagiotis Issaris c = kzalloc(sizeof(*c), GFP_KERNEL); 2761a028dd2SArnd Bergmann if (!c) 277454e2398SDavid Howells return -ENOMEM; 2781da177e4SLinus Torvalds 279acaebfd8SDavid Howells c->mtd = sb->s_mtd; 280acaebfd8SDavid Howells c->os_priv = sb; 281acaebfd8SDavid Howells sb->s_fs_info = c; 2821da177e4SLinus Torvalds 28392abc475SAndres Salomon ret = jffs2_parse_options(c, data); 28492abc475SAndres Salomon if (ret) { 28592abc475SAndres Salomon kfree(c); 28692abc475SAndres Salomon return -EINVAL; 28792abc475SAndres Salomon } 28892abc475SAndres Salomon 289acaebfd8SDavid Howells /* Initialize JFFS2 superblock locks, the further initialization will 290acaebfd8SDavid Howells * be done later */ 291ced22070SDavid Woodhouse mutex_init(&c->alloc_sem); 292ced22070SDavid Woodhouse mutex_init(&c->erase_free_sem); 293b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->erase_wait); 294b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->inocache_wq); 295b6220598SArtem B. Bityuckiy spin_lock_init(&c->erase_completion_lock); 296b6220598SArtem B. Bityuckiy spin_lock_init(&c->inocache_lock); 297b6220598SArtem B. Bityuckiy 2981da177e4SLinus Torvalds sb->s_op = &jffs2_super_operations; 2995f556aabSDavid Woodhouse sb->s_export_op = &jffs2_export_ops; 300acaebfd8SDavid Howells sb->s_flags = sb->s_flags | MS_NOATIME; 301aa98d7cfSKaiGai Kohei sb->s_xattr = jffs2_xattr_handlers; 302aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 303aa98d7cfSKaiGai Kohei sb->s_flags |= MS_POSIXACL; 304aa98d7cfSKaiGai Kohei #endif 305db719222SJan Blunck ret = jffs2_do_fill_super(sb, data, silent); 306db719222SJan Blunck return ret; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 309848b83a5SAl Viro static struct dentry *jffs2_mount(struct file_system_type *fs_type, 3101da177e4SLinus Torvalds int flags, const char *dev_name, 311848b83a5SAl Viro void *data) 3121da177e4SLinus Torvalds { 313848b83a5SAl Viro return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super); 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds static void jffs2_put_super (struct super_block *sb) 3171da177e4SLinus Torvalds { 3181da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 3191da177e4SLinus Torvalds 3209c261b33SJoe Perches jffs2_dbg(2, "%s()\n", __func__); 3211da177e4SLinus Torvalds 3228c85e125SChristoph Hellwig if (sb->s_dirt) 3238c85e125SChristoph Hellwig jffs2_write_super(sb); 3248c85e125SChristoph Hellwig 325ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 3261da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 327ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 328e631ddbaSFerenc Havasi 329e631ddbaSFerenc Havasi jffs2_sum_exit(c); 330e631ddbaSFerenc Havasi 3311da177e4SLinus Torvalds jffs2_free_ino_caches(c); 3321da177e4SLinus Torvalds jffs2_free_raw_node_refs(c); 3334ce1f562SFerenc Havasi if (jffs2_blocks_use_vmalloc(c)) 3341da177e4SLinus Torvalds vfree(c->blocks); 3351da177e4SLinus Torvalds else 3361da177e4SLinus Torvalds kfree(c->blocks); 3371da177e4SLinus Torvalds jffs2_flash_cleanup(c); 3381da177e4SLinus Torvalds kfree(c->inocache_list); 339aa98d7cfSKaiGai Kohei jffs2_clear_xattr_subsystem(c); 34085f2f2a8SArtem Bityutskiy mtd_sync(c->mtd); 3419c261b33SJoe Perches jffs2_dbg(1, "%s(): returning\n", __func__); 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds static void jffs2_kill_sb(struct super_block *sb) 3451da177e4SLinus Torvalds { 3461da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 347a69dde91SArtem B. Bityuckiy if (!(sb->s_flags & MS_RDONLY)) 348a69dde91SArtem B. Bityuckiy jffs2_stop_garbage_collect_thread(c); 349acaebfd8SDavid Howells kill_mtd_super(sb); 3501da177e4SLinus Torvalds kfree(c); 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds 3531da177e4SLinus Torvalds static struct file_system_type jffs2_fs_type = { 3541da177e4SLinus Torvalds .owner = THIS_MODULE, 3551da177e4SLinus Torvalds .name = "jffs2", 356848b83a5SAl Viro .mount = jffs2_mount, 3571da177e4SLinus Torvalds .kill_sb = jffs2_kill_sb, 3581da177e4SLinus Torvalds }; 3591da177e4SLinus Torvalds 3601da177e4SLinus Torvalds static int __init init_jffs2_fs(void) 3611da177e4SLinus Torvalds { 3621da177e4SLinus Torvalds int ret; 3631da177e4SLinus Torvalds 3643e68fbb5SDavid Woodhouse /* Paranoia checks for on-medium structures. If we ask GCC 3653e68fbb5SDavid Woodhouse to pack them with __attribute__((packed)) then it _also_ 3663e68fbb5SDavid Woodhouse assumes that they're not aligned -- so it emits crappy 3673e68fbb5SDavid Woodhouse code on some architectures. Ideally we want an attribute 3683e68fbb5SDavid Woodhouse which means just 'no padding', without the alignment 3693e68fbb5SDavid Woodhouse thing. But GCC doesn't have that -- we have to just 3703e68fbb5SDavid Woodhouse hope the structs are the right sizes, instead. */ 3712ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_unknown_node) != 12); 3722ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_dirent) != 40); 3732ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_inode) != 68); 3742ecd05aeSAlexey Dobriyan BUILD_BUG_ON(sizeof(struct jffs2_raw_summary) != 32); 3753e68fbb5SDavid Woodhouse 3765a528957SJoe Perches pr_info("version 2.2." 3772f82ce1eSAndrew Victor #ifdef CONFIG_JFFS2_FS_WRITEBUFFER 3781da177e4SLinus Torvalds " (NAND)" 3791da177e4SLinus Torvalds #endif 380e631ddbaSFerenc Havasi #ifdef CONFIG_JFFS2_SUMMARY 381e631ddbaSFerenc Havasi " (SUMMARY) " 382e631ddbaSFerenc Havasi #endif 383c00c310eSDavid Woodhouse " © 2001-2006 Red Hat, Inc.\n"); 3841da177e4SLinus Torvalds 3851da177e4SLinus Torvalds jffs2_inode_cachep = kmem_cache_create("jffs2_i", 3861da177e4SLinus Torvalds sizeof(struct jffs2_inode_info), 387fffb60f9SPaul Jackson 0, (SLAB_RECLAIM_ACCOUNT| 388fffb60f9SPaul Jackson SLAB_MEM_SPREAD), 38920c2df83SPaul Mundt jffs2_i_init_once); 3901da177e4SLinus Torvalds if (!jffs2_inode_cachep) { 3915a528957SJoe Perches pr_err("error: Failed to initialise inode cache\n"); 3921da177e4SLinus Torvalds return -ENOMEM; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds ret = jffs2_compressors_init(); 3951da177e4SLinus Torvalds if (ret) { 3965a528957SJoe Perches pr_err("error: Failed to initialise compressors\n"); 3971da177e4SLinus Torvalds goto out; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds ret = jffs2_create_slab_caches(); 4001da177e4SLinus Torvalds if (ret) { 4015a528957SJoe Perches pr_err("error: Failed to initialise slab caches\n"); 4021da177e4SLinus Torvalds goto out_compressors; 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds ret = register_filesystem(&jffs2_fs_type); 4051da177e4SLinus Torvalds if (ret) { 4065a528957SJoe Perches pr_err("error: Failed to register filesystem\n"); 4071da177e4SLinus Torvalds goto out_slab; 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds return 0; 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds out_slab: 4121da177e4SLinus Torvalds jffs2_destroy_slab_caches(); 4131da177e4SLinus Torvalds out_compressors: 4141da177e4SLinus Torvalds jffs2_compressors_exit(); 4151da177e4SLinus Torvalds out: 4161da177e4SLinus Torvalds kmem_cache_destroy(jffs2_inode_cachep); 4171da177e4SLinus Torvalds return ret; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds static void __exit exit_jffs2_fs(void) 4211da177e4SLinus Torvalds { 4221da177e4SLinus Torvalds unregister_filesystem(&jffs2_fs_type); 4231da177e4SLinus Torvalds jffs2_destroy_slab_caches(); 4241da177e4SLinus Torvalds jffs2_compressors_exit(); 4251da177e4SLinus Torvalds kmem_cache_destroy(jffs2_inode_cachep); 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds module_init(init_jffs2_fs); 4291da177e4SLinus Torvalds module_exit(exit_jffs2_fs); 4301da177e4SLinus Torvalds 4311da177e4SLinus Torvalds MODULE_DESCRIPTION("The Journalling Flash File System, v2"); 4321da177e4SLinus Torvalds MODULE_AUTHOR("Red Hat, Inc."); 4331da177e4SLinus Torvalds MODULE_LICENSE("GPL"); // Actually dual-licensed, but it doesn't matter for 4341da177e4SLinus Torvalds // the sake of this tag. It's Free Software. 435