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 121da177e4SLinus Torvalds #include <linux/kernel.h> 131da177e4SLinus Torvalds #include <linux/module.h> 141da177e4SLinus Torvalds #include <linux/slab.h> 151da177e4SLinus Torvalds #include <linux/init.h> 161da177e4SLinus Torvalds #include <linux/list.h> 171da177e4SLinus Torvalds #include <linux/fs.h> 189c74034fSArtem Bityutskiy #include <linux/err.h> 191da177e4SLinus Torvalds #include <linux/mount.h> 2092abc475SAndres Salomon #include <linux/parser.h> 211da177e4SLinus Torvalds #include <linux/jffs2.h> 221da177e4SLinus Torvalds #include <linux/pagemap.h> 23acaebfd8SDavid Howells #include <linux/mtd/super.h> 241da177e4SLinus Torvalds #include <linux/ctype.h> 251da177e4SLinus Torvalds #include <linux/namei.h> 2692abc475SAndres Salomon #include <linux/seq_file.h> 275f556aabSDavid Woodhouse #include <linux/exportfs.h> 281da177e4SLinus Torvalds #include "compr.h" 291da177e4SLinus Torvalds #include "nodelist.h" 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds static void jffs2_put_super(struct super_block *); 321da177e4SLinus Torvalds 33e18b890bSChristoph Lameter static struct kmem_cache *jffs2_inode_cachep; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds static struct inode *jffs2_alloc_inode(struct super_block *sb) 361da177e4SLinus Torvalds { 374e571abaSDavid Woodhouse struct jffs2_inode_info *f; 384e571abaSDavid Woodhouse 394e571abaSDavid Woodhouse f = kmem_cache_alloc(jffs2_inode_cachep, GFP_KERNEL); 404e571abaSDavid Woodhouse if (!f) 411da177e4SLinus Torvalds return NULL; 424e571abaSDavid Woodhouse return &f->vfs_inode; 431da177e4SLinus Torvalds } 441da177e4SLinus Torvalds 45fa0d7e3dSNick Piggin static void jffs2_i_callback(struct rcu_head *head) 46fa0d7e3dSNick Piggin { 47fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 48fa0d7e3dSNick Piggin kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode)); 49fa0d7e3dSNick Piggin } 50fa0d7e3dSNick Piggin 511da177e4SLinus Torvalds static void jffs2_destroy_inode(struct inode *inode) 521da177e4SLinus Torvalds { 53fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, jffs2_i_callback); 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds 5651cc5068SAlexey Dobriyan static void jffs2_i_init_once(void *foo) 571da177e4SLinus Torvalds { 584e571abaSDavid Woodhouse struct jffs2_inode_info *f = foo; 591da177e4SLinus Torvalds 604e571abaSDavid Woodhouse mutex_init(&f->sem); 614e571abaSDavid Woodhouse inode_init_once(&f->vfs_inode); 621da177e4SLinus Torvalds } 631da177e4SLinus Torvalds 6401ba6875SChristoph Hellwig static void jffs2_write_super(struct super_block *sb) 6501ba6875SChristoph Hellwig { 6601ba6875SChristoph Hellwig struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 67ebc1ac16SChristoph Hellwig 68ebc1ac16SChristoph Hellwig lock_super(sb); 6901ba6875SChristoph Hellwig sb->s_dirt = 0; 7001ba6875SChristoph Hellwig 71ebc1ac16SChristoph Hellwig if (!(sb->s_flags & MS_RDONLY)) { 7201ba6875SChristoph Hellwig D1(printk(KERN_DEBUG "jffs2_write_super()\n")); 7301ba6875SChristoph Hellwig jffs2_flush_wbuf_gc(c, 0); 7401ba6875SChristoph Hellwig } 7501ba6875SChristoph Hellwig 76ebc1ac16SChristoph Hellwig unlock_super(sb); 77ebc1ac16SChristoph Hellwig } 78ebc1ac16SChristoph Hellwig 7992abc475SAndres Salomon static const char *jffs2_compr_name(unsigned int compr) 8092abc475SAndres Salomon { 8192abc475SAndres Salomon switch (compr) { 8292abc475SAndres Salomon case JFFS2_COMPR_MODE_NONE: 8392abc475SAndres Salomon return "none"; 84123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 85123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCELZO: 86123005f3SAndres Salomon return "lzo"; 87123005f3SAndres Salomon #endif 88123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 89123005f3SAndres Salomon case JFFS2_COMPR_MODE_FORCEZLIB: 90123005f3SAndres Salomon return "zlib"; 91123005f3SAndres Salomon #endif 9292abc475SAndres Salomon default: 9392abc475SAndres Salomon /* should never happen; programmer error */ 9492abc475SAndres Salomon WARN_ON(1); 9592abc475SAndres Salomon return ""; 9692abc475SAndres Salomon } 9792abc475SAndres Salomon } 9892abc475SAndres Salomon 99*34c80b1dSAl Viro static int jffs2_show_options(struct seq_file *s, struct dentry *root) 10092abc475SAndres Salomon { 101*34c80b1dSAl Viro struct jffs2_sb_info *c = JFFS2_SB_INFO(root->d_sb); 10292abc475SAndres Salomon struct jffs2_mount_opts *opts = &c->mount_opts; 10392abc475SAndres Salomon 10492abc475SAndres Salomon if (opts->override_compr) 10592abc475SAndres Salomon seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr)); 10692abc475SAndres Salomon 10792abc475SAndres Salomon return 0; 10892abc475SAndres Salomon } 10992abc475SAndres Salomon 1101da177e4SLinus Torvalds static int jffs2_sync_fs(struct super_block *sb, int wait) 1111da177e4SLinus Torvalds { 1121da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 1131da177e4SLinus Torvalds 114d579ed00SChristoph Hellwig jffs2_write_super(sb); 115d579ed00SChristoph Hellwig 116ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 1171da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 118ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 1191da177e4SLinus Torvalds return 0; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds 1225f556aabSDavid Woodhouse static struct inode *jffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, 1235f556aabSDavid Woodhouse uint32_t generation) 1245f556aabSDavid Woodhouse { 1255f556aabSDavid Woodhouse /* We don't care about i_generation. We'll destroy the flash 1265f556aabSDavid Woodhouse before we start re-using inode numbers anyway. And even 1275f556aabSDavid Woodhouse if that wasn't true, we'd have other problems...*/ 1285f556aabSDavid Woodhouse return jffs2_iget(sb, ino); 1295f556aabSDavid Woodhouse } 1305f556aabSDavid Woodhouse 1315f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, 1325f556aabSDavid Woodhouse int fh_len, int fh_type) 1335f556aabSDavid Woodhouse { 1345f556aabSDavid Woodhouse return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 1355f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1365f556aabSDavid Woodhouse } 1375f556aabSDavid Woodhouse 1385f556aabSDavid Woodhouse static struct dentry *jffs2_fh_to_parent(struct super_block *sb, struct fid *fid, 1395f556aabSDavid Woodhouse int fh_len, int fh_type) 1405f556aabSDavid Woodhouse { 1415f556aabSDavid Woodhouse return generic_fh_to_parent(sb, fid, fh_len, fh_type, 1425f556aabSDavid Woodhouse jffs2_nfs_get_inode); 1435f556aabSDavid Woodhouse } 1445f556aabSDavid Woodhouse 1455f556aabSDavid Woodhouse static struct dentry *jffs2_get_parent(struct dentry *child) 1465f556aabSDavid Woodhouse { 1475f556aabSDavid Woodhouse struct jffs2_inode_info *f; 1485f556aabSDavid Woodhouse uint32_t pino; 1495f556aabSDavid Woodhouse 1505f556aabSDavid Woodhouse BUG_ON(!S_ISDIR(child->d_inode->i_mode)); 1515f556aabSDavid Woodhouse 1525f556aabSDavid Woodhouse f = JFFS2_INODE_INFO(child->d_inode); 1535f556aabSDavid Woodhouse 1545f556aabSDavid Woodhouse pino = f->inocache->pino_nlink; 1555f556aabSDavid Woodhouse 1565f556aabSDavid Woodhouse JFFS2_DEBUG("Parent of directory ino #%u is #%u\n", 1575f556aabSDavid Woodhouse f->inocache->ino, pino); 1585f556aabSDavid Woodhouse 1595f556aabSDavid Woodhouse return d_obtain_alias(jffs2_iget(child->d_inode->i_sb, pino)); 1605f556aabSDavid Woodhouse } 1615f556aabSDavid Woodhouse 162ac4cfdd6SAlexey Dobriyan static const struct export_operations jffs2_export_ops = { 1635f556aabSDavid Woodhouse .get_parent = jffs2_get_parent, 1645f556aabSDavid Woodhouse .fh_to_dentry = jffs2_fh_to_dentry, 1655f556aabSDavid Woodhouse .fh_to_parent = jffs2_fh_to_parent, 1665f556aabSDavid Woodhouse }; 1675f556aabSDavid Woodhouse 16892abc475SAndres Salomon /* 16992abc475SAndres Salomon * JFFS2 mount options. 17092abc475SAndres Salomon * 17192abc475SAndres Salomon * Opt_override_compr: override default compressor 17292abc475SAndres Salomon * Opt_err: just end of array marker 17392abc475SAndres Salomon */ 17492abc475SAndres Salomon enum { 17592abc475SAndres Salomon Opt_override_compr, 17692abc475SAndres Salomon Opt_err, 17792abc475SAndres Salomon }; 17892abc475SAndres Salomon 17992abc475SAndres Salomon static const match_table_t tokens = { 18092abc475SAndres Salomon {Opt_override_compr, "compr=%s"}, 18192abc475SAndres Salomon {Opt_err, NULL}, 18292abc475SAndres Salomon }; 18392abc475SAndres Salomon 18492abc475SAndres Salomon static int jffs2_parse_options(struct jffs2_sb_info *c, char *data) 18592abc475SAndres Salomon { 18692abc475SAndres Salomon substring_t args[MAX_OPT_ARGS]; 18792abc475SAndres Salomon char *p, *name; 18892abc475SAndres Salomon 18992abc475SAndres Salomon if (!data) 19092abc475SAndres Salomon return 0; 19192abc475SAndres Salomon 19292abc475SAndres Salomon while ((p = strsep(&data, ","))) { 19392abc475SAndres Salomon int token; 19492abc475SAndres Salomon 19592abc475SAndres Salomon if (!*p) 19692abc475SAndres Salomon continue; 19792abc475SAndres Salomon 19892abc475SAndres Salomon token = match_token(p, tokens, args); 19992abc475SAndres Salomon switch (token) { 20092abc475SAndres Salomon case Opt_override_compr: 20192abc475SAndres Salomon name = match_strdup(&args[0]); 20292abc475SAndres Salomon 20392abc475SAndres Salomon if (!name) 20492abc475SAndres Salomon return -ENOMEM; 205123005f3SAndres Salomon if (!strcmp(name, "none")) 20692abc475SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_NONE; 207123005f3SAndres Salomon #ifdef CONFIG_JFFS2_LZO 208123005f3SAndres Salomon else if (!strcmp(name, "lzo")) 209123005f3SAndres Salomon c->mount_opts.compr = JFFS2_COMPR_MODE_FORCELZO; 210123005f3SAndres Salomon #endif 211123005f3SAndres Salomon #ifdef CONFIG_JFFS2_ZLIB 212123005f3SAndres Salomon else if (!strcmp(name, "zlib")) 213123005f3SAndres Salomon c->mount_opts.compr = 214123005f3SAndres Salomon JFFS2_COMPR_MODE_FORCEZLIB; 215123005f3SAndres Salomon #endif 216123005f3SAndres Salomon else { 217123005f3SAndres Salomon printk(KERN_ERR "JFFS2 Error: unknown compressor \"%s\"", 218123005f3SAndres Salomon name); 219123005f3SAndres Salomon kfree(name); 220123005f3SAndres Salomon return -EINVAL; 22192abc475SAndres Salomon } 22292abc475SAndres Salomon kfree(name); 223123005f3SAndres Salomon c->mount_opts.override_compr = true; 22492abc475SAndres Salomon break; 22592abc475SAndres Salomon default: 22692abc475SAndres Salomon printk(KERN_ERR "JFFS2 Error: unrecognized mount option '%s' or missing value\n", 22792abc475SAndres Salomon p); 22892abc475SAndres Salomon return -EINVAL; 22992abc475SAndres Salomon } 23092abc475SAndres Salomon } 23192abc475SAndres Salomon 23292abc475SAndres Salomon return 0; 23392abc475SAndres Salomon } 23492abc475SAndres Salomon 23592abc475SAndres Salomon static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data) 23692abc475SAndres Salomon { 23792abc475SAndres Salomon struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 23892abc475SAndres Salomon int err; 23992abc475SAndres Salomon 24092abc475SAndres Salomon err = jffs2_parse_options(c, data); 24192abc475SAndres Salomon if (err) 24292abc475SAndres Salomon return -EINVAL; 24392abc475SAndres Salomon 24492abc475SAndres Salomon return jffs2_do_remount_fs(sb, flags, data); 24592abc475SAndres Salomon } 24692abc475SAndres Salomon 247ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations jffs2_super_operations = 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds .alloc_inode = jffs2_alloc_inode, 2501da177e4SLinus Torvalds .destroy_inode =jffs2_destroy_inode, 2511da177e4SLinus Torvalds .put_super = jffs2_put_super, 2521da177e4SLinus Torvalds .write_super = jffs2_write_super, 2531da177e4SLinus Torvalds .statfs = jffs2_statfs, 2541da177e4SLinus Torvalds .remount_fs = jffs2_remount_fs, 255b57922d9SAl Viro .evict_inode = jffs2_evict_inode, 2561da177e4SLinus Torvalds .dirty_inode = jffs2_dirty_inode, 25792abc475SAndres Salomon .show_options = jffs2_show_options, 2581da177e4SLinus Torvalds .sync_fs = jffs2_sync_fs, 2591da177e4SLinus Torvalds }; 2601da177e4SLinus Torvalds 261acaebfd8SDavid Howells /* 262acaebfd8SDavid Howells * fill in the superblock 263acaebfd8SDavid Howells */ 264acaebfd8SDavid Howells static int jffs2_fill_super(struct super_block *sb, void *data, int silent) 2651da177e4SLinus Torvalds { 2661da177e4SLinus Torvalds struct jffs2_sb_info *c; 267db719222SJan Blunck int ret; 268db719222SJan Blunck 269acaebfd8SDavid Howells D1(printk(KERN_DEBUG "jffs2_get_sb_mtd():" 270acaebfd8SDavid Howells " New superblock for device %d (\"%s\")\n", 271acaebfd8SDavid Howells sb->s_mtd->index, sb->s_mtd->name)); 2721da177e4SLinus Torvalds 273f8314dc6SPanagiotis Issaris c = kzalloc(sizeof(*c), GFP_KERNEL); 2741a028dd2SArnd Bergmann if (!c) 275454e2398SDavid Howells return -ENOMEM; 2761da177e4SLinus Torvalds 277acaebfd8SDavid Howells c->mtd = sb->s_mtd; 278acaebfd8SDavid Howells c->os_priv = sb; 279acaebfd8SDavid Howells sb->s_fs_info = c; 2801da177e4SLinus Torvalds 28192abc475SAndres Salomon ret = jffs2_parse_options(c, data); 28292abc475SAndres Salomon if (ret) { 28392abc475SAndres Salomon kfree(c); 28492abc475SAndres Salomon return -EINVAL; 28592abc475SAndres Salomon } 28692abc475SAndres Salomon 287acaebfd8SDavid Howells /* Initialize JFFS2 superblock locks, the further initialization will 288acaebfd8SDavid Howells * be done later */ 289ced22070SDavid Woodhouse mutex_init(&c->alloc_sem); 290ced22070SDavid Woodhouse mutex_init(&c->erase_free_sem); 291b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->erase_wait); 292b6220598SArtem B. Bityuckiy init_waitqueue_head(&c->inocache_wq); 293b6220598SArtem B. Bityuckiy spin_lock_init(&c->erase_completion_lock); 294b6220598SArtem B. Bityuckiy spin_lock_init(&c->inocache_lock); 295b6220598SArtem B. Bityuckiy 2961da177e4SLinus Torvalds sb->s_op = &jffs2_super_operations; 2975f556aabSDavid Woodhouse sb->s_export_op = &jffs2_export_ops; 298acaebfd8SDavid Howells sb->s_flags = sb->s_flags | MS_NOATIME; 299aa98d7cfSKaiGai Kohei sb->s_xattr = jffs2_xattr_handlers; 300aa98d7cfSKaiGai Kohei #ifdef CONFIG_JFFS2_FS_POSIX_ACL 301aa98d7cfSKaiGai Kohei sb->s_flags |= MS_POSIXACL; 302aa98d7cfSKaiGai Kohei #endif 303db719222SJan Blunck ret = jffs2_do_fill_super(sb, data, silent); 304db719222SJan Blunck return ret; 3051da177e4SLinus Torvalds } 3061da177e4SLinus Torvalds 307848b83a5SAl Viro static struct dentry *jffs2_mount(struct file_system_type *fs_type, 3081da177e4SLinus Torvalds int flags, const char *dev_name, 309848b83a5SAl Viro void *data) 3101da177e4SLinus Torvalds { 311848b83a5SAl Viro return mount_mtd(fs_type, flags, dev_name, data, jffs2_fill_super); 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static void jffs2_put_super (struct super_block *sb) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds D2(printk(KERN_DEBUG "jffs2: jffs2_put_super()\n")); 3191da177e4SLinus Torvalds 3208c85e125SChristoph Hellwig if (sb->s_dirt) 3218c85e125SChristoph Hellwig jffs2_write_super(sb); 3228c85e125SChristoph Hellwig 323ced22070SDavid Woodhouse mutex_lock(&c->alloc_sem); 3241da177e4SLinus Torvalds jffs2_flush_wbuf_pad(c); 325ced22070SDavid Woodhouse mutex_unlock(&c->alloc_sem); 326e631ddbaSFerenc Havasi 327e631ddbaSFerenc Havasi jffs2_sum_exit(c); 328e631ddbaSFerenc Havasi 3291da177e4SLinus Torvalds jffs2_free_ino_caches(c); 3301da177e4SLinus Torvalds jffs2_free_raw_node_refs(c); 3314ce1f562SFerenc Havasi if (jffs2_blocks_use_vmalloc(c)) 3321da177e4SLinus Torvalds vfree(c->blocks); 3331da177e4SLinus Torvalds else 3341da177e4SLinus Torvalds kfree(c->blocks); 3351da177e4SLinus Torvalds jffs2_flash_cleanup(c); 3361da177e4SLinus Torvalds kfree(c->inocache_list); 337aa98d7cfSKaiGai Kohei jffs2_clear_xattr_subsystem(c); 3381da177e4SLinus Torvalds if (c->mtd->sync) 3391da177e4SLinus Torvalds c->mtd->sync(c->mtd); 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds D1(printk(KERN_DEBUG "jffs2_put_super returning\n")); 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 3761da177e4SLinus Torvalds printk(KERN_INFO "JFFS2 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) { 3911da177e4SLinus Torvalds printk(KERN_ERR "JFFS2 error: Failed to initialise inode cache\n"); 3921da177e4SLinus Torvalds return -ENOMEM; 3931da177e4SLinus Torvalds } 3941da177e4SLinus Torvalds ret = jffs2_compressors_init(); 3951da177e4SLinus Torvalds if (ret) { 3961da177e4SLinus Torvalds printk(KERN_ERR "JFFS2 error: Failed to initialise compressors\n"); 3971da177e4SLinus Torvalds goto out; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds ret = jffs2_create_slab_caches(); 4001da177e4SLinus Torvalds if (ret) { 4011da177e4SLinus Torvalds printk(KERN_ERR "JFFS2 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) { 4061da177e4SLinus Torvalds printk(KERN_ERR "JFFS2 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