Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/befs/linuxvfs.c |
| 3 | * |
| 4 | * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com |
| 5 | * |
| 6 | */ |
| 7 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 9 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/module.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/fs.h> |
| 13 | #include <linux/errno.h> |
| 14 | #include <linux/stat.h> |
| 15 | #include <linux/nls.h> |
| 16 | #include <linux/buffer_head.h> |
| 17 | #include <linux/vfs.h> |
| 18 | #include <linux/parser.h> |
| 19 | #include <linux/namei.h> |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 20 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | #include "befs.h" |
| 23 | #include "btree.h" |
| 24 | #include "inode.h" |
| 25 | #include "datastream.h" |
| 26 | #include "super.h" |
| 27 | #include "io.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | MODULE_DESCRIPTION("BeOS File System (BeFS) driver"); |
| 30 | MODULE_AUTHOR("Will Dyson"); |
| 31 | MODULE_LICENSE("GPL"); |
| 32 | |
| 33 | /* The units the vfs expects inode->i_blocks to be in */ |
| 34 | #define VFS_BLOCK_SIZE 512 |
| 35 | |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 36 | static int befs_readdir(struct file *, struct dir_context *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | static int befs_get_block(struct inode *, sector_t, struct buffer_head *, int); |
| 38 | static int befs_readpage(struct file *file, struct page *page); |
| 39 | static sector_t befs_bmap(struct address_space *mapping, sector_t block); |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 40 | static struct dentry *befs_lookup(struct inode *, struct dentry *, unsigned int); |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 41 | static struct inode *befs_iget(struct super_block *, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | static struct inode *befs_alloc_inode(struct super_block *sb); |
| 43 | static void befs_destroy_inode(struct inode *inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | static void befs_destroy_inodecache(void); |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 45 | static void *befs_follow_link(struct dentry *, struct nameidata *); |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 46 | static void *befs_fast_follow_link(struct dentry *, struct nameidata *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | static int befs_utf2nls(struct super_block *sb, const char *in, int in_len, |
| 48 | char **out, int *out_len); |
| 49 | static int befs_nls2utf(struct super_block *sb, const char *in, int in_len, |
| 50 | char **out, int *out_len); |
| 51 | static void befs_put_super(struct super_block *); |
| 52 | static int befs_remount(struct super_block *, int *, char *); |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 53 | static int befs_statfs(struct dentry *, struct kstatfs *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | static int parse_options(char *, befs_mount_options *); |
| 55 | |
| 56 | static const struct super_operations befs_sops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | .alloc_inode = befs_alloc_inode, /* allocate a new inode */ |
| 58 | .destroy_inode = befs_destroy_inode, /* deallocate an inode */ |
| 59 | .put_super = befs_put_super, /* uninit super */ |
| 60 | .statfs = befs_statfs, /* statfs */ |
| 61 | .remount_fs = befs_remount, |
Miklos Szeredi | 552c3c6 | 2008-02-08 04:21:38 -0800 | [diff] [blame] | 62 | .show_options = generic_show_options, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | }; |
| 64 | |
| 65 | /* slab cache for befs_inode_info objects */ |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 66 | static struct kmem_cache *befs_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 68 | static const struct file_operations befs_dir_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | .read = generic_read_dir, |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 70 | .iterate = befs_readdir, |
Al Viro | 59af158 | 2008-08-24 07:24:41 -0400 | [diff] [blame] | 71 | .llseek = generic_file_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | }; |
| 73 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 74 | static const struct inode_operations befs_dir_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | .lookup = befs_lookup, |
| 76 | }; |
| 77 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 78 | static const struct address_space_operations befs_aops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | .readpage = befs_readpage, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | .bmap = befs_bmap, |
| 81 | }; |
| 82 | |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 83 | static const struct inode_operations befs_fast_symlink_inode_operations = { |
| 84 | .readlink = generic_readlink, |
| 85 | .follow_link = befs_fast_follow_link, |
| 86 | }; |
| 87 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 88 | static const struct inode_operations befs_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | .readlink = generic_readlink, |
| 90 | .follow_link = befs_follow_link, |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 91 | .put_link = kfree_put_link, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | /* |
| 95 | * Called by generic_file_read() to read a page of data |
| 96 | * |
| 97 | * In turn, simply calls a generic block read function and |
| 98 | * passes it the address of befs_get_block, for mapping file |
| 99 | * positions to disk blocks. |
| 100 | */ |
| 101 | static int |
| 102 | befs_readpage(struct file *file, struct page *page) |
| 103 | { |
| 104 | return block_read_full_page(page, befs_get_block); |
| 105 | } |
| 106 | |
| 107 | static sector_t |
| 108 | befs_bmap(struct address_space *mapping, sector_t block) |
| 109 | { |
| 110 | return generic_block_bmap(mapping, block, befs_get_block); |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * Generic function to map a file position (block) to a |
| 115 | * disk offset (passed back in bh_result). |
| 116 | * |
| 117 | * Used by many higher level functions. |
| 118 | * |
| 119 | * Calls befs_fblock2brun() in datastream.c to do the real work. |
| 120 | * |
| 121 | * -WD 10-26-01 |
| 122 | */ |
| 123 | |
| 124 | static int |
| 125 | befs_get_block(struct inode *inode, sector_t block, |
| 126 | struct buffer_head *bh_result, int create) |
| 127 | { |
| 128 | struct super_block *sb = inode->i_sb; |
| 129 | befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; |
| 130 | befs_block_run run = BAD_IADDR; |
| 131 | int res = 0; |
| 132 | ulong disk_off; |
| 133 | |
| 134 | befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 135 | (unsigned long)inode->i_ino, (long)block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | if (create) { |
| 137 | befs_error(sb, "befs_get_block() was asked to write to " |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 138 | "block %ld in inode %lu", (long)block, |
| 139 | (unsigned long)inode->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | return -EPERM; |
| 141 | } |
| 142 | |
| 143 | res = befs_fblock2brun(sb, ds, block, &run); |
| 144 | if (res != BEFS_OK) { |
| 145 | befs_error(sb, |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 146 | "<--- %s for inode %lu, block %ld ERROR", |
| 147 | __func__, (unsigned long)inode->i_ino, |
| 148 | (long)block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | return -EFBIG; |
| 150 | } |
| 151 | |
| 152 | disk_off = (ulong) iaddr2blockno(sb, &run); |
| 153 | |
| 154 | map_bh(bh_result, inode->i_sb, disk_off); |
| 155 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 156 | befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu", |
| 157 | __func__, (unsigned long)inode->i_ino, (long)block, |
| 158 | (unsigned long)disk_off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static struct dentry * |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 164 | befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
| 166 | struct inode *inode = NULL; |
| 167 | struct super_block *sb = dir->i_sb; |
| 168 | befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; |
| 169 | befs_off_t offset; |
| 170 | int ret; |
| 171 | int utfnamelen; |
| 172 | char *utfname; |
| 173 | const char *name = dentry->d_name.name; |
| 174 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 175 | befs_debug(sb, "---> %s name %s inode %ld", __func__, |
| 176 | dentry->d_name.name, dir->i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
| 178 | /* Convert to UTF-8 */ |
| 179 | if (BEFS_SB(sb)->nls) { |
| 180 | ret = |
| 181 | befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); |
| 182 | if (ret < 0) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 183 | befs_debug(sb, "<--- %s ERROR", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | return ERR_PTR(ret); |
| 185 | } |
| 186 | ret = befs_btree_find(sb, ds, utfname, &offset); |
| 187 | kfree(utfname); |
| 188 | |
| 189 | } else { |
| 190 | ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset); |
| 191 | } |
| 192 | |
| 193 | if (ret == BEFS_BT_NOT_FOUND) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 194 | befs_debug(sb, "<--- %s %s not found", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | dentry->d_name.name); |
| 196 | return ERR_PTR(-ENOENT); |
| 197 | |
| 198 | } else if (ret != BEFS_OK || offset == 0) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 199 | befs_warning(sb, "<--- %s Error", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | return ERR_PTR(-ENODATA); |
| 201 | } |
| 202 | |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 203 | inode = befs_iget(dir->i_sb, (ino_t) offset); |
| 204 | if (IS_ERR(inode)) |
| 205 | return ERR_CAST(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | |
| 207 | d_add(dentry, inode); |
| 208 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 209 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | return NULL; |
| 212 | } |
| 213 | |
| 214 | static int |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 215 | befs_readdir(struct file *file, struct dir_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | { |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 217 | struct inode *inode = file_inode(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | struct super_block *sb = inode->i_sb; |
| 219 | befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; |
| 220 | befs_off_t value; |
| 221 | int result; |
| 222 | size_t keysize; |
| 223 | unsigned char d_type; |
| 224 | char keybuf[BEFS_NAME_LEN + 1]; |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 225 | const char *dirname = file->f_path.dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 227 | befs_debug(sb, "---> %s name %s, inode %ld, ctx->pos %lld", |
| 228 | __func__, dirname, inode->i_ino, ctx->pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 230 | more: |
| 231 | result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | keybuf, &keysize, &value); |
| 233 | |
| 234 | if (result == BEFS_ERR) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 235 | befs_debug(sb, "<--- %s ERROR", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | befs_error(sb, "IO error reading %s (inode %lu)", |
| 237 | dirname, inode->i_ino); |
| 238 | return -EIO; |
| 239 | |
| 240 | } else if (result == BEFS_BT_END) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 241 | befs_debug(sb, "<--- %s END", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | return 0; |
| 243 | |
| 244 | } else if (result == BEFS_BT_EMPTY) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 245 | befs_debug(sb, "<--- %s Empty directory", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | d_type = DT_UNKNOWN; |
| 250 | |
| 251 | /* Convert to NLS */ |
| 252 | if (BEFS_SB(sb)->nls) { |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 253 | char *nlsname; |
| 254 | int nlsnamelen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | result = |
| 256 | befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen); |
| 257 | if (result < 0) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 258 | befs_debug(sb, "<--- %s ERROR", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | return result; |
| 260 | } |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 261 | if (!dir_emit(ctx, nlsname, nlsnamelen, |
| 262 | (ino_t) value, d_type)) { |
| 263 | kfree(nlsname); |
| 264 | return 0; |
| 265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | kfree(nlsname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } else { |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 268 | if (!dir_emit(ctx, keybuf, keysize, |
| 269 | (ino_t) value, d_type)) |
| 270 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
Al Viro | f0f49ef | 2013-05-22 13:44:05 -0400 | [diff] [blame] | 272 | ctx->pos++; |
| 273 | goto more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 275 | befs_debug(sb, "<--- %s pos %lld", __func__, ctx->pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static struct inode * |
| 281 | befs_alloc_inode(struct super_block *sb) |
| 282 | { |
| 283 | struct befs_inode_info *bi; |
| 284 | bi = (struct befs_inode_info *)kmem_cache_alloc(befs_inode_cachep, |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 285 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | if (!bi) |
| 287 | return NULL; |
| 288 | return &bi->vfs_inode; |
| 289 | } |
| 290 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 291 | static void befs_i_callback(struct rcu_head *head) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 293 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); |
| 295 | } |
| 296 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 297 | static void befs_destroy_inode(struct inode *inode) |
| 298 | { |
| 299 | call_rcu(&inode->i_rcu, befs_i_callback); |
| 300 | } |
| 301 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 302 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
| 304 | struct befs_inode_info *bi = (struct befs_inode_info *) foo; |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 305 | |
| 306 | inode_init_once(&bi->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 309 | static struct inode *befs_iget(struct super_block *sb, unsigned long ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
| 311 | struct buffer_head *bh = NULL; |
| 312 | befs_inode *raw_inode = NULL; |
| 313 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | befs_sb_info *befs_sb = BEFS_SB(sb); |
| 315 | befs_inode_info *befs_ino = NULL; |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 316 | struct inode *inode; |
| 317 | long ret = -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 319 | befs_debug(sb, "---> %s inode = %lu", __func__, ino); |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 320 | |
| 321 | inode = iget_locked(sb, ino); |
Rakesh Pandit | ac34a1b | 2014-01-15 19:58:28 +0200 | [diff] [blame] | 322 | if (!inode) |
| 323 | return ERR_PTR(-ENOMEM); |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 324 | if (!(inode->i_state & I_NEW)) |
| 325 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
| 327 | befs_ino = BEFS_I(inode); |
| 328 | |
| 329 | /* convert from vfs's inode number to befs's inode number */ |
| 330 | befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino); |
| 331 | |
| 332 | befs_debug(sb, " real inode number [%u, %hu, %hu]", |
| 333 | befs_ino->i_inode_num.allocation_group, |
| 334 | befs_ino->i_inode_num.start, befs_ino->i_inode_num.len); |
| 335 | |
| 336 | bh = befs_bread(sb, inode->i_ino); |
| 337 | if (!bh) { |
| 338 | befs_error(sb, "unable to read inode block - " |
| 339 | "inode = %lu", inode->i_ino); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 340 | goto unacquire_none; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | raw_inode = (befs_inode *) bh->b_data; |
| 344 | |
| 345 | befs_dump_inode(sb, raw_inode); |
| 346 | |
| 347 | if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) { |
| 348 | befs_error(sb, "Bad inode: %lu", inode->i_ino); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 349 | goto unacquire_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode); |
| 353 | |
| 354 | /* |
| 355 | * set uid and gid. But since current BeOS is single user OS, so |
| 356 | * you can change by "uid" or "gid" options. |
| 357 | */ |
| 358 | |
| 359 | inode->i_uid = befs_sb->mount_opts.use_uid ? |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 360 | befs_sb->mount_opts.uid : |
| 361 | make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | inode->i_gid = befs_sb->mount_opts.use_gid ? |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 363 | befs_sb->mount_opts.gid : |
| 364 | make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 366 | set_nlink(inode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
| 368 | /* |
| 369 | * BEFS's time is 64 bits, but current VFS is 32 bits... |
| 370 | * BEFS don't have access time. Nor inode change time. VFS |
| 371 | * doesn't have creation time. |
| 372 | * Also, the lower 16 bits of the last_modified_time and |
| 373 | * create_time are just a counter to help ensure uniqueness |
| 374 | * for indexing purposes. (PFD, page 54) |
| 375 | */ |
| 376 | |
| 377 | inode->i_mtime.tv_sec = |
| 378 | fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16; |
| 379 | inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */ |
| 380 | inode->i_ctime = inode->i_mtime; |
| 381 | inode->i_atime = inode->i_mtime; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | |
| 383 | befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num); |
| 384 | befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent); |
| 385 | befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes); |
| 386 | befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags); |
| 387 | |
| 388 | if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){ |
| 389 | inode->i_size = 0; |
| 390 | inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE; |
Fabian Frederick | 39d7a29 | 2014-06-06 14:36:15 -0700 | [diff] [blame] | 391 | strlcpy(befs_ino->i_data.symlink, raw_inode->data.symlink, |
| 392 | BEFS_SYMLINK_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | } else { |
| 394 | int num_blks; |
| 395 | |
| 396 | befs_ino->i_data.ds = |
Jesper Juhl | e0e3d32 | 2011-01-12 17:00:26 -0800 | [diff] [blame] | 397 | fsds_to_cpu(sb, &raw_inode->data.datastream); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
| 399 | num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); |
| 400 | inode->i_blocks = |
| 401 | num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE); |
| 402 | inode->i_size = befs_ino->i_data.ds.size; |
| 403 | } |
| 404 | |
| 405 | inode->i_mapping->a_ops = &befs_aops; |
| 406 | |
| 407 | if (S_ISREG(inode->i_mode)) { |
Christoph Hellwig | 2cf0691 | 2005-11-07 00:59:44 -0800 | [diff] [blame] | 408 | inode->i_fop = &generic_ro_fops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } else if (S_ISDIR(inode->i_mode)) { |
| 410 | inode->i_op = &befs_dir_inode_operations; |
| 411 | inode->i_fop = &befs_dir_operations; |
| 412 | } else if (S_ISLNK(inode->i_mode)) { |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 413 | if (befs_ino->i_flags & BEFS_LONG_SYMLINK) |
| 414 | inode->i_op = &befs_symlink_inode_operations; |
| 415 | else |
| 416 | inode->i_op = &befs_fast_symlink_inode_operations; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } else { |
| 418 | befs_error(sb, "Inode %lu is not a regular file, " |
| 419 | "directory or symlink. THAT IS WRONG! BeFS has no " |
| 420 | "on disk special files", inode->i_ino); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 421 | goto unacquire_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | } |
| 423 | |
| 424 | brelse(bh); |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 425 | befs_debug(sb, "<--- %s", __func__); |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 426 | unlock_new_inode(inode); |
| 427 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 429 | unacquire_bh: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | brelse(bh); |
| 431 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 432 | unacquire_none: |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 433 | iget_failed(inode); |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 434 | befs_debug(sb, "<--- %s - Bad inode", __func__); |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 435 | return ERR_PTR(ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | /* Initialize the inode cache. Called at fs setup. |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 439 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | * Taken from NFS implementation by Al Viro. |
| 441 | */ |
Fabian Frederick | 91a52ab | 2014-04-03 14:50:22 -0700 | [diff] [blame] | 442 | static int __init |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | befs_init_inodecache(void) |
| 444 | { |
| 445 | befs_inode_cachep = kmem_cache_create("befs_inode_cache", |
| 446 | sizeof (struct befs_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 447 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 448 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 449 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | if (befs_inode_cachep == NULL) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 451 | pr_err("%s: Couldn't initialize inode slabcache\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | return -ENOMEM; |
| 453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | /* Called at fs teardown. |
| 458 | * |
| 459 | * Taken from NFS implementation by Al Viro. |
| 460 | */ |
| 461 | static void |
| 462 | befs_destroy_inodecache(void) |
| 463 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 464 | /* |
| 465 | * Make sure all delayed rcu free inodes are flushed before we |
| 466 | * destroy cache. |
| 467 | */ |
| 468 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 469 | kmem_cache_destroy(befs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | } |
| 471 | |
| 472 | /* |
| 473 | * The inode of symbolic link is different to data stream. |
| 474 | * The data stream become link name. Unless the LONG_SYMLINK |
| 475 | * flag is set. |
| 476 | */ |
Linus Torvalds | db87389 | 2005-08-20 13:20:01 -0700 | [diff] [blame] | 477 | static void * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | befs_follow_link(struct dentry *dentry, struct nameidata *nd) |
| 479 | { |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 480 | struct super_block *sb = dentry->d_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | befs_inode_info *befs_ino = BEFS_I(dentry->d_inode); |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 482 | befs_data_stream *data = &befs_ino->i_data.ds; |
| 483 | befs_off_t len = data->size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | char *link; |
| 485 | |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 486 | if (len == 0) { |
| 487 | befs_error(sb, "Long symlink with illegal length"); |
| 488 | link = ERR_PTR(-EIO); |
| 489 | } else { |
| 490 | befs_debug(sb, "Follow long symlink"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 492 | link = kmalloc(len, GFP_NOFS); |
| 493 | if (!link) { |
| 494 | link = ERR_PTR(-ENOMEM); |
| 495 | } else if (befs_read_lsymlink(sb, data, link, len) != len) { |
| 496 | kfree(link); |
| 497 | befs_error(sb, "Failed to read entire long symlink"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | link = ERR_PTR(-EIO); |
Duane Griffin | 7df5fa0 | 2008-12-19 20:47:18 +0000 | [diff] [blame] | 499 | } else { |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 500 | link[len - 1] = '\0'; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | nd_set_link(nd, link); |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 504 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 507 | |
| 508 | static void * |
| 509 | befs_fast_follow_link(struct dentry *dentry, struct nameidata *nd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | { |
| 511 | befs_inode_info *befs_ino = BEFS_I(dentry->d_inode); |
Al Viro | 48bc06e | 2013-09-16 10:35:31 -0400 | [diff] [blame] | 512 | nd_set_link(nd, befs_ino->i_data.symlink); |
| 513 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | } |
| 515 | |
| 516 | /* |
| 517 | * UTF-8 to NLS charset convert routine |
| 518 | * |
| 519 | * |
| 520 | * Changed 8/10/01 by Will Dyson. Now use uni2char() / char2uni() rather than |
| 521 | * the nls tables directly |
| 522 | */ |
| 523 | |
| 524 | static int |
| 525 | befs_utf2nls(struct super_block *sb, const char *in, |
| 526 | int in_len, char **out, int *out_len) |
| 527 | { |
| 528 | struct nls_table *nls = BEFS_SB(sb)->nls; |
| 529 | int i, o; |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 530 | unicode_t uni; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | int unilen, utflen; |
| 532 | char *result; |
Diego Calleja | 94f563c | 2006-08-05 12:14:55 -0700 | [diff] [blame] | 533 | /* The utf8->nls conversion won't make the final nls string bigger |
| 534 | * than the utf one, but if the string is pure ascii they'll have the |
| 535 | * same width and an extra char is needed to save the additional \0 |
| 536 | */ |
| 537 | int maxlen = in_len + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 539 | befs_debug(sb, "---> %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
| 541 | if (!nls) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 542 | befs_error(sb, "%s called with no NLS table loaded", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | return -EINVAL; |
| 544 | } |
| 545 | |
| 546 | *out = result = kmalloc(maxlen, GFP_NOFS); |
| 547 | if (!*out) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 548 | befs_error(sb, "%s cannot allocate memory", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | *out_len = 0; |
| 550 | return -ENOMEM; |
| 551 | } |
| 552 | |
| 553 | for (i = o = 0; i < in_len; i += utflen, o += unilen) { |
| 554 | |
| 555 | /* convert from UTF-8 to Unicode */ |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 556 | utflen = utf8_to_utf32(&in[i], in_len - i, &uni); |
| 557 | if (utflen < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | goto conv_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
| 560 | /* convert from Unicode to nls */ |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 561 | if (uni > MAX_WCHAR_T) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | goto conv_err; |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 563 | unilen = nls->uni2char(uni, &result[o], in_len - o); |
| 564 | if (unilen < 0) |
| 565 | goto conv_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | result[o] = '\0'; |
| 568 | *out_len = o; |
| 569 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 570 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
| 572 | return o; |
| 573 | |
| 574 | conv_err: |
| 575 | befs_error(sb, "Name using character set %s contains a character that " |
| 576 | "cannot be converted to unicode.", nls->charset); |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 577 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | kfree(result); |
| 579 | return -EILSEQ; |
| 580 | } |
| 581 | |
| 582 | /** |
| 583 | * befs_nls2utf - Convert NLS string to utf8 encodeing |
| 584 | * @sb: Superblock |
Fabian Frederick | 817e1d9 | 2014-06-06 14:36:17 -0700 | [diff] [blame] | 585 | * @in: Input string buffer in NLS format |
| 586 | * @in_len: Length of input string in bytes |
| 587 | * @out: The output string in UTF-8 format |
| 588 | * @out_len: Length of the output buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | * |
Fabian Frederick | 817e1d9 | 2014-06-06 14:36:17 -0700 | [diff] [blame] | 590 | * Converts input string @in, which is in the format of the loaded NLS map, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | * into a utf8 string. |
| 592 | * |
Fabian Frederick | 817e1d9 | 2014-06-06 14:36:17 -0700 | [diff] [blame] | 593 | * The destination string @out is allocated by this function and the caller is |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | * responsible for freeing it with kfree() |
| 595 | * |
Fabian Frederick | 817e1d9 | 2014-06-06 14:36:17 -0700 | [diff] [blame] | 596 | * On return, *@out_len is the length of @out in bytes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | * |
| 598 | * On success, the return value is the number of utf8 characters written to |
Fabian Frederick | 817e1d9 | 2014-06-06 14:36:17 -0700 | [diff] [blame] | 599 | * the output buffer @out. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | * |
| 601 | * On Failure, a negative number coresponding to the error code is returned. |
| 602 | */ |
| 603 | |
| 604 | static int |
| 605 | befs_nls2utf(struct super_block *sb, const char *in, |
| 606 | int in_len, char **out, int *out_len) |
| 607 | { |
| 608 | struct nls_table *nls = BEFS_SB(sb)->nls; |
| 609 | int i, o; |
| 610 | wchar_t uni; |
| 611 | int unilen, utflen; |
| 612 | char *result; |
Diego Calleja | 94f563c | 2006-08-05 12:14:55 -0700 | [diff] [blame] | 613 | /* There're nls characters that will translate to 3-chars-wide UTF-8 |
| 614 | * characters, a additional byte is needed to save the final \0 |
| 615 | * in special cases */ |
| 616 | int maxlen = (3 * in_len) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 618 | befs_debug(sb, "---> %s\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
| 620 | if (!nls) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 621 | befs_error(sb, "%s called with no NLS table loaded.", |
| 622 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | return -EINVAL; |
| 624 | } |
| 625 | |
| 626 | *out = result = kmalloc(maxlen, GFP_NOFS); |
| 627 | if (!*out) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 628 | befs_error(sb, "%s cannot allocate memory", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | *out_len = 0; |
| 630 | return -ENOMEM; |
| 631 | } |
| 632 | |
| 633 | for (i = o = 0; i < in_len; i += unilen, o += utflen) { |
| 634 | |
| 635 | /* convert from nls to unicode */ |
| 636 | unilen = nls->char2uni(&in[i], in_len - i, &uni); |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 637 | if (unilen < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | goto conv_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
| 640 | /* convert from unicode to UTF-8 */ |
Alan Stern | 74675a5 | 2009-04-30 10:08:18 -0400 | [diff] [blame] | 641 | utflen = utf32_to_utf8(uni, &result[o], 3); |
| 642 | if (utflen <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | goto conv_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | } |
| 645 | |
| 646 | result[o] = '\0'; |
| 647 | *out_len = o; |
| 648 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 649 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | |
| 651 | return i; |
| 652 | |
| 653 | conv_err: |
| 654 | befs_error(sb, "Name using charecter set %s contains a charecter that " |
| 655 | "cannot be converted to unicode.", nls->charset); |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 656 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | kfree(result); |
| 658 | return -EILSEQ; |
| 659 | } |
| 660 | |
| 661 | /** |
| 662 | * Use the |
| 663 | * |
| 664 | */ |
| 665 | enum { |
| 666 | Opt_uid, Opt_gid, Opt_charset, Opt_debug, Opt_err, |
| 667 | }; |
| 668 | |
Steven Whitehouse | a447c09 | 2008-10-13 10:46:57 +0100 | [diff] [blame] | 669 | static const match_table_t befs_tokens = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | {Opt_uid, "uid=%d"}, |
| 671 | {Opt_gid, "gid=%d"}, |
| 672 | {Opt_charset, "iocharset=%s"}, |
| 673 | {Opt_debug, "debug"}, |
| 674 | {Opt_err, NULL} |
| 675 | }; |
| 676 | |
| 677 | static int |
| 678 | parse_options(char *options, befs_mount_options * opts) |
| 679 | { |
| 680 | char *p; |
| 681 | substring_t args[MAX_OPT_ARGS]; |
| 682 | int option; |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 683 | kuid_t uid; |
| 684 | kgid_t gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | |
| 686 | /* Initialize options */ |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 687 | opts->uid = GLOBAL_ROOT_UID; |
| 688 | opts->gid = GLOBAL_ROOT_GID; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | opts->use_uid = 0; |
| 690 | opts->use_gid = 0; |
| 691 | opts->iocharset = NULL; |
| 692 | opts->debug = 0; |
| 693 | |
| 694 | if (!options) |
| 695 | return 1; |
| 696 | |
| 697 | while ((p = strsep(&options, ",")) != NULL) { |
| 698 | int token; |
| 699 | if (!*p) |
| 700 | continue; |
| 701 | |
| 702 | token = match_token(p, befs_tokens, args); |
| 703 | switch (token) { |
| 704 | case Opt_uid: |
| 705 | if (match_int(&args[0], &option)) |
| 706 | return 0; |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 707 | uid = INVALID_UID; |
| 708 | if (option >= 0) |
| 709 | uid = make_kuid(current_user_ns(), option); |
| 710 | if (!uid_valid(uid)) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 711 | pr_err("Invalid uid %d, " |
| 712 | "using default\n", option); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | break; |
| 714 | } |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 715 | opts->uid = uid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | opts->use_uid = 1; |
| 717 | break; |
| 718 | case Opt_gid: |
| 719 | if (match_int(&args[0], &option)) |
| 720 | return 0; |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 721 | gid = INVALID_GID; |
| 722 | if (option >= 0) |
| 723 | gid = make_kgid(current_user_ns(), option); |
| 724 | if (!gid_valid(gid)) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 725 | pr_err("Invalid gid %d, " |
| 726 | "using default\n", option); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | break; |
| 728 | } |
Eric W. Biederman | 31aba05 | 2012-02-10 10:51:24 -0800 | [diff] [blame] | 729 | opts->gid = gid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | opts->use_gid = 1; |
| 731 | break; |
| 732 | case Opt_charset: |
| 733 | kfree(opts->iocharset); |
| 734 | opts->iocharset = match_strdup(&args[0]); |
| 735 | if (!opts->iocharset) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 736 | pr_err("allocation failure for " |
| 737 | "iocharset string\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | return 0; |
| 739 | } |
| 740 | break; |
| 741 | case Opt_debug: |
| 742 | opts->debug = 1; |
| 743 | break; |
| 744 | default: |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 745 | pr_err("Unrecognized mount option \"%s\" " |
| 746 | "or missing value\n", p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | return 0; |
| 748 | } |
| 749 | } |
| 750 | return 1; |
| 751 | } |
| 752 | |
| 753 | /* This function has the responsibiltiy of getting the |
| 754 | * filesystem ready for unmounting. |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 755 | * Basically, we free everything that we allocated in |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | * befs_read_inode |
| 757 | */ |
| 758 | static void |
| 759 | befs_put_super(struct super_block *sb) |
| 760 | { |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 761 | kfree(BEFS_SB(sb)->mount_opts.iocharset); |
| 762 | BEFS_SB(sb)->mount_opts.iocharset = NULL; |
Thomas Gleixner | 6d729e4 | 2009-08-16 21:05:08 +0000 | [diff] [blame] | 763 | unload_nls(BEFS_SB(sb)->nls); |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 764 | kfree(sb->s_fs_info); |
| 765 | sb->s_fs_info = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | |
| 768 | /* Allocate private field of the superblock, fill it. |
| 769 | * |
| 770 | * Finish filling the public superblock fields |
| 771 | * Make the root directory |
| 772 | * Load a set of NLS translations if needed. |
| 773 | */ |
| 774 | static int |
| 775 | befs_fill_super(struct super_block *sb, void *data, int silent) |
| 776 | { |
| 777 | struct buffer_head *bh; |
| 778 | befs_sb_info *befs_sb; |
| 779 | befs_super_block *disk_sb; |
| 780 | struct inode *root; |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 781 | long ret = -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | const unsigned long sb_block = 0; |
| 783 | const off_t x86_sb_off = 512; |
| 784 | |
Miklos Szeredi | 552c3c6 | 2008-02-08 04:21:38 -0800 | [diff] [blame] | 785 | save_mount_options(sb, data); |
| 786 | |
Fabian Frederick | 2d4319e | 2014-04-03 14:50:21 -0700 | [diff] [blame] | 787 | sb->s_fs_info = kzalloc(sizeof(*befs_sb), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | if (sb->s_fs_info == NULL) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 789 | pr_err("(%s): Unable to allocate memory for private " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | "portion of superblock. Bailing.\n", sb->s_id); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 791 | goto unacquire_none; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | } |
| 793 | befs_sb = BEFS_SB(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | |
| 795 | if (!parse_options((char *) data, &befs_sb->mount_opts)) { |
| 796 | befs_error(sb, "cannot parse mount options"); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 797 | goto unacquire_priv_sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | } |
| 799 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 800 | befs_debug(sb, "---> %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
| 802 | #ifndef CONFIG_BEFS_RW |
| 803 | if (!(sb->s_flags & MS_RDONLY)) { |
| 804 | befs_warning(sb, |
| 805 | "No write support. Marking filesystem read-only"); |
| 806 | sb->s_flags |= MS_RDONLY; |
| 807 | } |
| 808 | #endif /* CONFIG_BEFS_RW */ |
| 809 | |
| 810 | /* |
| 811 | * Set dummy blocksize to read super block. |
| 812 | * Will be set to real fs blocksize later. |
| 813 | * |
| 814 | * Linux 2.4.10 and later refuse to read blocks smaller than |
| 815 | * the hardsect size for the device. But we also need to read at |
| 816 | * least 1k to get the second 512 bytes of the volume. |
| 817 | * -WD 10-26-01 |
| 818 | */ |
| 819 | sb_min_blocksize(sb, 1024); |
| 820 | |
| 821 | if (!(bh = sb_bread(sb, sb_block))) { |
| 822 | befs_error(sb, "unable to read superblock"); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 823 | goto unacquire_priv_sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 824 | } |
| 825 | |
| 826 | /* account for offset of super block on x86 */ |
| 827 | disk_sb = (befs_super_block *) bh->b_data; |
Harvey Harrison | 152b95a | 2008-10-15 22:04:03 -0700 | [diff] [blame] | 828 | if ((disk_sb->magic1 == BEFS_SUPER_MAGIC1_LE) || |
| 829 | (disk_sb->magic1 == BEFS_SUPER_MAGIC1_BE)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | befs_debug(sb, "Using PPC superblock location"); |
| 831 | } else { |
| 832 | befs_debug(sb, "Using x86 superblock location"); |
| 833 | disk_sb = |
| 834 | (befs_super_block *) ((void *) bh->b_data + x86_sb_off); |
| 835 | } |
| 836 | |
| 837 | if (befs_load_sb(sb, disk_sb) != BEFS_OK) |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 838 | goto unacquire_bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
| 840 | befs_dump_super_block(sb, disk_sb); |
| 841 | |
| 842 | brelse(bh); |
| 843 | |
| 844 | if (befs_check_sb(sb) != BEFS_OK) |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 845 | goto unacquire_priv_sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | |
| 847 | if( befs_sb->num_blocks > ~((sector_t)0) ) { |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 848 | befs_error(sb, "blocks count: %llu " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | "is larger than the host can use", |
| 850 | befs_sb->num_blocks); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 851 | goto unacquire_priv_sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | /* |
| 855 | * set up enough so that it can read an inode |
| 856 | * Fill in kernel superblock fields from private sb |
| 857 | */ |
| 858 | sb->s_magic = BEFS_SUPER_MAGIC; |
| 859 | /* Set real blocksize of fs */ |
| 860 | sb_set_blocksize(sb, (ulong) befs_sb->block_size); |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 861 | sb->s_op = &befs_sops; |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 862 | root = befs_iget(sb, iaddr2blockno(sb, &(befs_sb->root_dir))); |
| 863 | if (IS_ERR(root)) { |
| 864 | ret = PTR_ERR(root); |
| 865 | goto unacquire_priv_sbp; |
| 866 | } |
Al Viro | 48fde70 | 2012-01-08 22:15:13 -0500 | [diff] [blame] | 867 | sb->s_root = d_make_root(root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | if (!sb->s_root) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | befs_error(sb, "get root inode failed"); |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 870 | goto unacquire_priv_sbp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
| 873 | /* load nls library */ |
| 874 | if (befs_sb->mount_opts.iocharset) { |
| 875 | befs_debug(sb, "Loading nls: %s", |
| 876 | befs_sb->mount_opts.iocharset); |
| 877 | befs_sb->nls = load_nls(befs_sb->mount_opts.iocharset); |
| 878 | if (!befs_sb->nls) { |
| 879 | befs_warning(sb, "Cannot load nls %s" |
| 880 | " loading default nls", |
| 881 | befs_sb->mount_opts.iocharset); |
| 882 | befs_sb->nls = load_nls_default(); |
| 883 | } |
| 884 | /* load default nls if none is specified in mount options */ |
| 885 | } else { |
| 886 | befs_debug(sb, "Loading default nls"); |
| 887 | befs_sb->nls = load_nls_default(); |
| 888 | } |
| 889 | |
| 890 | return 0; |
| 891 | /*****************/ |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 892 | unacquire_bh: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | brelse(bh); |
| 894 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 895 | unacquire_priv_sbp: |
Al Viro | 8dd5ca5 | 2010-01-28 22:11:38 -0500 | [diff] [blame] | 896 | kfree(befs_sb->mount_opts.iocharset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | kfree(sb->s_fs_info); |
| 898 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 899 | unacquire_none: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | sb->s_fs_info = NULL; |
David Howells | 96eb541 | 2008-02-07 00:15:31 -0800 | [diff] [blame] | 901 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
| 903 | |
| 904 | static int |
| 905 | befs_remount(struct super_block *sb, int *flags, char *data) |
| 906 | { |
Theodore Ts'o | 02b9984 | 2014-03-13 10:14:33 -0400 | [diff] [blame] | 907 | sync_filesystem(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | if (!(*flags & MS_RDONLY)) |
| 909 | return -EINVAL; |
| 910 | return 0; |
| 911 | } |
| 912 | |
| 913 | static int |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 914 | befs_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 916 | struct super_block *sb = dentry->d_sb; |
Coly Li | 8587246 | 2009-04-02 16:59:32 -0700 | [diff] [blame] | 917 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 919 | befs_debug(sb, "---> %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | |
| 921 | buf->f_type = BEFS_SUPER_MAGIC; |
| 922 | buf->f_bsize = sb->s_blocksize; |
| 923 | buf->f_blocks = BEFS_SB(sb)->num_blocks; |
| 924 | buf->f_bfree = BEFS_SB(sb)->num_blocks - BEFS_SB(sb)->used_blocks; |
| 925 | buf->f_bavail = buf->f_bfree; |
| 926 | buf->f_files = 0; /* UNKNOWN */ |
| 927 | buf->f_ffree = 0; /* UNKNOWN */ |
Coly Li | 8587246 | 2009-04-02 16:59:32 -0700 | [diff] [blame] | 928 | buf->f_fsid.val[0] = (u32)id; |
| 929 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | buf->f_namelen = BEFS_NAME_LEN; |
| 931 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 932 | befs_debug(sb, "<--- %s", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 937 | static struct dentry * |
| 938 | befs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, |
| 939 | void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 941 | return mount_bdev(fs_type, flags, dev_name, data, befs_fill_super); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | } |
| 943 | |
| 944 | static struct file_system_type befs_fs_type = { |
| 945 | .owner = THIS_MODULE, |
| 946 | .name = "befs", |
Al Viro | 152a083 | 2010-07-25 00:46:55 +0400 | [diff] [blame] | 947 | .mount = befs_mount, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | .kill_sb = kill_block_super, |
| 949 | .fs_flags = FS_REQUIRES_DEV, |
| 950 | }; |
Eric W. Biederman | 7f78e03 | 2013-03-02 19:39:14 -0800 | [diff] [blame] | 951 | MODULE_ALIAS_FS("befs"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | |
| 953 | static int __init |
| 954 | init_befs_fs(void) |
| 955 | { |
| 956 | int err; |
| 957 | |
Fabian Frederick | dac52fc | 2014-04-03 14:50:23 -0700 | [diff] [blame] | 958 | pr_info("version: %s\n", BEFS_VERSION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | |
| 960 | err = befs_init_inodecache(); |
| 961 | if (err) |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 962 | goto unacquire_none; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | err = register_filesystem(&befs_fs_type); |
| 965 | if (err) |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 966 | goto unacquire_inodecache; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | |
| 968 | return 0; |
| 969 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 970 | unacquire_inodecache: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | befs_destroy_inodecache(); |
| 972 | |
Adrian Bunk | 0418726 | 2006-06-30 18:23:04 +0200 | [diff] [blame] | 973 | unacquire_none: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | return err; |
| 975 | } |
| 976 | |
| 977 | static void __exit |
| 978 | exit_befs_fs(void) |
| 979 | { |
| 980 | befs_destroy_inodecache(); |
| 981 | |
| 982 | unregister_filesystem(&befs_fs_type); |
| 983 | } |
| 984 | |
| 985 | /* |
| 986 | Macros that typecheck the init and exit functions, |
| 987 | ensures that they are called at init and cleanup, |
| 988 | and eliminates warnings about unused functions. |
| 989 | */ |
| 990 | module_init(init_befs_fs) |
| 991 | module_exit(exit_befs_fs) |