11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/hfs/super.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1995-1997 Paul H. Hargrove 51da177e4SLinus Torvalds * (C) 2003 Ardis Technologies <roman@ardistech.com> 61da177e4SLinus Torvalds * This file may be distributed under the terms of the GNU General Public License. 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * This file contains hfs_read_super(), some of the super_ops and 914b30d62SRobert P. J. Day * init_hfs_fs() and exit_hfs_fs(). The remaining super_ops are in 101da177e4SLinus Torvalds * inode.c since they deal with inodes. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds 131da177e4SLinus Torvalds */ 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds #include <linux/module.h> 161da177e4SLinus Torvalds #include <linux/blkdev.h> 17717dd80eSRoman Zippel #include <linux/mount.h> 181da177e4SLinus Torvalds #include <linux/init.h> 19328b9227SRoman Zippel #include <linux/nls.h> 201da177e4SLinus Torvalds #include <linux/parser.h> 21717dd80eSRoman Zippel #include <linux/seq_file.h> 225a0e3ad6STejun Heo #include <linux/slab.h> 231da177e4SLinus Torvalds #include <linux/vfs.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #include "hfs_fs.h" 261da177e4SLinus Torvalds #include "btree.h" 271da177e4SLinus Torvalds 28e18b890bSChristoph Lameter static struct kmem_cache *hfs_inode_cachep; 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 311da177e4SLinus Torvalds 3258bc5bbbSChristoph Hellwig static int hfs_sync_fs(struct super_block *sb, int wait) 3358bc5bbbSChristoph Hellwig { 3458bc5bbbSChristoph Hellwig hfs_mdb_commit(sb); 3558bc5bbbSChristoph Hellwig return 0; 3658bc5bbbSChristoph Hellwig } 3758bc5bbbSChristoph Hellwig 381da177e4SLinus Torvalds /* 391da177e4SLinus Torvalds * hfs_put_super() 401da177e4SLinus Torvalds * 411da177e4SLinus Torvalds * This is the put_super() entry in the super_operations structure for 421da177e4SLinus Torvalds * HFS filesystems. The purpose is to release the resources 431da177e4SLinus Torvalds * associated with the superblock sb. 441da177e4SLinus Torvalds */ 451da177e4SLinus Torvalds static void hfs_put_super(struct super_block *sb) 461da177e4SLinus Torvalds { 475687b578SArtem Bityutskiy cancel_delayed_work_sync(&HFS_SB(sb)->mdb_work); 481da177e4SLinus Torvalds hfs_mdb_close(sb); 491da177e4SLinus Torvalds /* release the MDB's resources */ 501da177e4SLinus Torvalds hfs_mdb_put(sb); 511da177e4SLinus Torvalds } 521da177e4SLinus Torvalds 535687b578SArtem Bityutskiy static void flush_mdb(struct work_struct *work) 545687b578SArtem Bityutskiy { 555687b578SArtem Bityutskiy struct hfs_sb_info *sbi; 565687b578SArtem Bityutskiy struct super_block *sb; 575687b578SArtem Bityutskiy 585687b578SArtem Bityutskiy sbi = container_of(work, struct hfs_sb_info, mdb_work.work); 595687b578SArtem Bityutskiy sb = sbi->sb; 605687b578SArtem Bityutskiy 615687b578SArtem Bityutskiy spin_lock(&sbi->work_lock); 625687b578SArtem Bityutskiy sbi->work_queued = 0; 635687b578SArtem Bityutskiy spin_unlock(&sbi->work_lock); 645687b578SArtem Bityutskiy 655687b578SArtem Bityutskiy hfs_mdb_commit(sb); 665687b578SArtem Bityutskiy } 675687b578SArtem Bityutskiy 685687b578SArtem Bityutskiy void hfs_mark_mdb_dirty(struct super_block *sb) 695687b578SArtem Bityutskiy { 705687b578SArtem Bityutskiy struct hfs_sb_info *sbi = HFS_SB(sb); 715687b578SArtem Bityutskiy unsigned long delay; 725687b578SArtem Bityutskiy 735687b578SArtem Bityutskiy if (sb->s_flags & MS_RDONLY) 745687b578SArtem Bityutskiy return; 755687b578SArtem Bityutskiy 765687b578SArtem Bityutskiy spin_lock(&sbi->work_lock); 775687b578SArtem Bityutskiy if (!sbi->work_queued) { 785687b578SArtem Bityutskiy delay = msecs_to_jiffies(dirty_writeback_interval * 10); 795687b578SArtem Bityutskiy queue_delayed_work(system_long_wq, &sbi->mdb_work, delay); 805687b578SArtem Bityutskiy sbi->work_queued = 1; 815687b578SArtem Bityutskiy } 825687b578SArtem Bityutskiy spin_unlock(&sbi->work_lock); 835687b578SArtem Bityutskiy } 845687b578SArtem Bityutskiy 851da177e4SLinus Torvalds /* 861da177e4SLinus Torvalds * hfs_statfs() 871da177e4SLinus Torvalds * 881da177e4SLinus Torvalds * This is the statfs() entry in the super_operations structure for 891da177e4SLinus Torvalds * HFS filesystems. The purpose is to return various data about the 901da177e4SLinus Torvalds * filesystem. 911da177e4SLinus Torvalds * 921da177e4SLinus Torvalds * changed f_files/f_ffree to reflect the fs_ablock/free_ablocks. 931da177e4SLinus Torvalds */ 94726c3342SDavid Howells static int hfs_statfs(struct dentry *dentry, struct kstatfs *buf) 951da177e4SLinus Torvalds { 96726c3342SDavid Howells struct super_block *sb = dentry->d_sb; 977dd2c000SColy Li u64 id = huge_encode_dev(sb->s_bdev->bd_dev); 98726c3342SDavid Howells 991da177e4SLinus Torvalds buf->f_type = HFS_SUPER_MAGIC; 1001da177e4SLinus Torvalds buf->f_bsize = sb->s_blocksize; 1011da177e4SLinus Torvalds buf->f_blocks = (u32)HFS_SB(sb)->fs_ablocks * HFS_SB(sb)->fs_div; 1021da177e4SLinus Torvalds buf->f_bfree = (u32)HFS_SB(sb)->free_ablocks * HFS_SB(sb)->fs_div; 1031da177e4SLinus Torvalds buf->f_bavail = buf->f_bfree; 1041da177e4SLinus Torvalds buf->f_files = HFS_SB(sb)->fs_ablocks; 1051da177e4SLinus Torvalds buf->f_ffree = HFS_SB(sb)->free_ablocks; 1067dd2c000SColy Li buf->f_fsid.val[0] = (u32)id; 1077dd2c000SColy Li buf->f_fsid.val[1] = (u32)(id >> 32); 1081da177e4SLinus Torvalds buf->f_namelen = HFS_NAMELEN; 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds return 0; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds 1131da177e4SLinus Torvalds static int hfs_remount(struct super_block *sb, int *flags, char *data) 1141da177e4SLinus Torvalds { 1151da177e4SLinus Torvalds *flags |= MS_NODIRATIME; 1161da177e4SLinus Torvalds if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) 1171da177e4SLinus Torvalds return 0; 1181da177e4SLinus Torvalds if (!(*flags & MS_RDONLY)) { 1191da177e4SLinus Torvalds if (!(HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_UNMNT))) { 1207cf3cc30SRoman Zippel printk(KERN_WARNING "hfs: filesystem was not cleanly unmounted, " 1211da177e4SLinus Torvalds "running fsck.hfs is recommended. leaving read-only.\n"); 1221da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 1231da177e4SLinus Torvalds *flags |= MS_RDONLY; 1241da177e4SLinus Torvalds } else if (HFS_SB(sb)->mdb->drAtrb & cpu_to_be16(HFS_SB_ATTRIB_SLOCK)) { 1257cf3cc30SRoman Zippel printk(KERN_WARNING "hfs: filesystem is marked locked, leaving read-only.\n"); 1261da177e4SLinus Torvalds sb->s_flags |= MS_RDONLY; 1271da177e4SLinus Torvalds *flags |= MS_RDONLY; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds return 0; 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 13334c80b1dSAl Viro static int hfs_show_options(struct seq_file *seq, struct dentry *root) 134717dd80eSRoman Zippel { 13534c80b1dSAl Viro struct hfs_sb_info *sbi = HFS_SB(root->d_sb); 136717dd80eSRoman Zippel 137717dd80eSRoman Zippel if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f)) 138717dd80eSRoman Zippel seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator); 139717dd80eSRoman Zippel if (sbi->s_type != cpu_to_be32(0x3f3f3f3f)) 140717dd80eSRoman Zippel seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type); 14143b5e4ccSEric W. Biederman seq_printf(seq, ",uid=%u,gid=%u", 14243b5e4ccSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_uid), 14343b5e4ccSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_gid)); 144717dd80eSRoman Zippel if (sbi->s_file_umask != 0133) 145717dd80eSRoman Zippel seq_printf(seq, ",file_umask=%o", sbi->s_file_umask); 146717dd80eSRoman Zippel if (sbi->s_dir_umask != 0022) 147717dd80eSRoman Zippel seq_printf(seq, ",dir_umask=%o", sbi->s_dir_umask); 148717dd80eSRoman Zippel if (sbi->part >= 0) 149717dd80eSRoman Zippel seq_printf(seq, ",part=%u", sbi->part); 150717dd80eSRoman Zippel if (sbi->session >= 0) 151717dd80eSRoman Zippel seq_printf(seq, ",session=%u", sbi->session); 152328b9227SRoman Zippel if (sbi->nls_disk) 153328b9227SRoman Zippel seq_printf(seq, ",codepage=%s", sbi->nls_disk->charset); 154328b9227SRoman Zippel if (sbi->nls_io) 155328b9227SRoman Zippel seq_printf(seq, ",iocharset=%s", sbi->nls_io->charset); 156717dd80eSRoman Zippel if (sbi->s_quiet) 157717dd80eSRoman Zippel seq_printf(seq, ",quiet"); 158717dd80eSRoman Zippel return 0; 159717dd80eSRoman Zippel } 160717dd80eSRoman Zippel 1611da177e4SLinus Torvalds static struct inode *hfs_alloc_inode(struct super_block *sb) 1621da177e4SLinus Torvalds { 1631da177e4SLinus Torvalds struct hfs_inode_info *i; 1641da177e4SLinus Torvalds 165e94b1766SChristoph Lameter i = kmem_cache_alloc(hfs_inode_cachep, GFP_KERNEL); 1661da177e4SLinus Torvalds return i ? &i->vfs_inode : NULL; 1671da177e4SLinus Torvalds } 1681da177e4SLinus Torvalds 169fa0d7e3dSNick Piggin static void hfs_i_callback(struct rcu_head *head) 170fa0d7e3dSNick Piggin { 171fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 172fa0d7e3dSNick Piggin kmem_cache_free(hfs_inode_cachep, HFS_I(inode)); 173fa0d7e3dSNick Piggin } 174fa0d7e3dSNick Piggin 1751da177e4SLinus Torvalds static void hfs_destroy_inode(struct inode *inode) 1761da177e4SLinus Torvalds { 177fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, hfs_i_callback); 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds 180ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations hfs_super_operations = { 1811da177e4SLinus Torvalds .alloc_inode = hfs_alloc_inode, 1821da177e4SLinus Torvalds .destroy_inode = hfs_destroy_inode, 1831da177e4SLinus Torvalds .write_inode = hfs_write_inode, 184b57922d9SAl Viro .evict_inode = hfs_evict_inode, 1851da177e4SLinus Torvalds .put_super = hfs_put_super, 18658bc5bbbSChristoph Hellwig .sync_fs = hfs_sync_fs, 1871da177e4SLinus Torvalds .statfs = hfs_statfs, 1881da177e4SLinus Torvalds .remount_fs = hfs_remount, 189717dd80eSRoman Zippel .show_options = hfs_show_options, 1901da177e4SLinus Torvalds }; 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds enum { 1931da177e4SLinus Torvalds opt_uid, opt_gid, opt_umask, opt_file_umask, opt_dir_umask, 1941da177e4SLinus Torvalds opt_part, opt_session, opt_type, opt_creator, opt_quiet, 195328b9227SRoman Zippel opt_codepage, opt_iocharset, 1961da177e4SLinus Torvalds opt_err 1971da177e4SLinus Torvalds }; 1981da177e4SLinus Torvalds 199a447c093SSteven Whitehouse static const match_table_t tokens = { 2001da177e4SLinus Torvalds { opt_uid, "uid=%u" }, 2011da177e4SLinus Torvalds { opt_gid, "gid=%u" }, 2021da177e4SLinus Torvalds { opt_umask, "umask=%o" }, 2031da177e4SLinus Torvalds { opt_file_umask, "file_umask=%o" }, 2041da177e4SLinus Torvalds { opt_dir_umask, "dir_umask=%o" }, 2051da177e4SLinus Torvalds { opt_part, "part=%u" }, 2061da177e4SLinus Torvalds { opt_session, "session=%u" }, 2071da177e4SLinus Torvalds { opt_type, "type=%s" }, 2081da177e4SLinus Torvalds { opt_creator, "creator=%s" }, 2091da177e4SLinus Torvalds { opt_quiet, "quiet" }, 210328b9227SRoman Zippel { opt_codepage, "codepage=%s" }, 211328b9227SRoman Zippel { opt_iocharset, "iocharset=%s" }, 2121da177e4SLinus Torvalds { opt_err, NULL } 2131da177e4SLinus Torvalds }; 2141da177e4SLinus Torvalds 2151da177e4SLinus Torvalds static inline int match_fourchar(substring_t *arg, u32 *result) 2161da177e4SLinus Torvalds { 2171da177e4SLinus Torvalds if (arg->to - arg->from != 4) 2181da177e4SLinus Torvalds return -EINVAL; 2191da177e4SLinus Torvalds memcpy(result, arg->from, 4); 2201da177e4SLinus Torvalds return 0; 2211da177e4SLinus Torvalds } 2221da177e4SLinus Torvalds 2231da177e4SLinus Torvalds /* 2241da177e4SLinus Torvalds * parse_options() 2251da177e4SLinus Torvalds * 2261da177e4SLinus Torvalds * adapted from linux/fs/msdos/inode.c written 1992,93 by Werner Almesberger 2271da177e4SLinus Torvalds * This function is called by hfs_read_super() to parse the mount options. 2281da177e4SLinus Torvalds */ 2291da177e4SLinus Torvalds static int parse_options(char *options, struct hfs_sb_info *hsb) 2301da177e4SLinus Torvalds { 2311da177e4SLinus Torvalds char *p; 2321da177e4SLinus Torvalds substring_t args[MAX_OPT_ARGS]; 2331da177e4SLinus Torvalds int tmp, token; 2341da177e4SLinus Torvalds 2351da177e4SLinus Torvalds /* initialize the sb with defaults */ 23694c9a5eeSDavid Howells hsb->s_uid = current_uid(); 23794c9a5eeSDavid Howells hsb->s_gid = current_gid(); 2381da177e4SLinus Torvalds hsb->s_file_umask = 0133; 2391da177e4SLinus Torvalds hsb->s_dir_umask = 0022; 2401da177e4SLinus Torvalds hsb->s_type = hsb->s_creator = cpu_to_be32(0x3f3f3f3f); /* == '????' */ 2411da177e4SLinus Torvalds hsb->s_quiet = 0; 2421da177e4SLinus Torvalds hsb->part = -1; 2431da177e4SLinus Torvalds hsb->session = -1; 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvalds if (!options) 2461da177e4SLinus Torvalds return 1; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds while ((p = strsep(&options, ",")) != NULL) { 2491da177e4SLinus Torvalds if (!*p) 2501da177e4SLinus Torvalds continue; 2511da177e4SLinus Torvalds 2521da177e4SLinus Torvalds token = match_token(p, tokens, args); 2531da177e4SLinus Torvalds switch (token) { 2541da177e4SLinus Torvalds case opt_uid: 2551da177e4SLinus Torvalds if (match_int(&args[0], &tmp)) { 2567cf3cc30SRoman Zippel printk(KERN_ERR "hfs: uid requires an argument\n"); 2571da177e4SLinus Torvalds return 0; 2581da177e4SLinus Torvalds } 25943b5e4ccSEric W. Biederman hsb->s_uid = make_kuid(current_user_ns(), (uid_t)tmp); 26043b5e4ccSEric W. Biederman if (!uid_valid(hsb->s_uid)) { 26143b5e4ccSEric W. Biederman printk(KERN_ERR "hfs: invalid uid %d\n", tmp); 26243b5e4ccSEric W. Biederman return 0; 26343b5e4ccSEric W. Biederman } 2641da177e4SLinus Torvalds break; 2651da177e4SLinus Torvalds case opt_gid: 2661da177e4SLinus Torvalds if (match_int(&args[0], &tmp)) { 2677cf3cc30SRoman Zippel printk(KERN_ERR "hfs: gid requires an argument\n"); 2681da177e4SLinus Torvalds return 0; 2691da177e4SLinus Torvalds } 27043b5e4ccSEric W. Biederman hsb->s_gid = make_kgid(current_user_ns(), (gid_t)tmp); 27143b5e4ccSEric W. Biederman if (!gid_valid(hsb->s_gid)) { 27243b5e4ccSEric W. Biederman printk(KERN_ERR "hfs: invalid gid %d\n", tmp); 27343b5e4ccSEric W. Biederman return 0; 27443b5e4ccSEric W. Biederman } 2751da177e4SLinus Torvalds break; 2761da177e4SLinus Torvalds case opt_umask: 2771da177e4SLinus Torvalds if (match_octal(&args[0], &tmp)) { 2787cf3cc30SRoman Zippel printk(KERN_ERR "hfs: umask requires a value\n"); 2791da177e4SLinus Torvalds return 0; 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds hsb->s_file_umask = (umode_t)tmp; 2821da177e4SLinus Torvalds hsb->s_dir_umask = (umode_t)tmp; 2831da177e4SLinus Torvalds break; 2841da177e4SLinus Torvalds case opt_file_umask: 2851da177e4SLinus Torvalds if (match_octal(&args[0], &tmp)) { 2867cf3cc30SRoman Zippel printk(KERN_ERR "hfs: file_umask requires a value\n"); 2871da177e4SLinus Torvalds return 0; 2881da177e4SLinus Torvalds } 2891da177e4SLinus Torvalds hsb->s_file_umask = (umode_t)tmp; 2901da177e4SLinus Torvalds break; 2911da177e4SLinus Torvalds case opt_dir_umask: 2921da177e4SLinus Torvalds if (match_octal(&args[0], &tmp)) { 2937cf3cc30SRoman Zippel printk(KERN_ERR "hfs: dir_umask requires a value\n"); 2941da177e4SLinus Torvalds return 0; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds hsb->s_dir_umask = (umode_t)tmp; 2971da177e4SLinus Torvalds break; 2981da177e4SLinus Torvalds case opt_part: 2991da177e4SLinus Torvalds if (match_int(&args[0], &hsb->part)) { 3007cf3cc30SRoman Zippel printk(KERN_ERR "hfs: part requires an argument\n"); 3011da177e4SLinus Torvalds return 0; 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds break; 3041da177e4SLinus Torvalds case opt_session: 3051da177e4SLinus Torvalds if (match_int(&args[0], &hsb->session)) { 3067cf3cc30SRoman Zippel printk(KERN_ERR "hfs: session requires an argument\n"); 3071da177e4SLinus Torvalds return 0; 3081da177e4SLinus Torvalds } 3091da177e4SLinus Torvalds break; 3101da177e4SLinus Torvalds case opt_type: 3111da177e4SLinus Torvalds if (match_fourchar(&args[0], &hsb->s_type)) { 3127cf3cc30SRoman Zippel printk(KERN_ERR "hfs: type requires a 4 character value\n"); 3131da177e4SLinus Torvalds return 0; 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds break; 3161da177e4SLinus Torvalds case opt_creator: 3171da177e4SLinus Torvalds if (match_fourchar(&args[0], &hsb->s_creator)) { 3187cf3cc30SRoman Zippel printk(KERN_ERR "hfs: creator requires a 4 character value\n"); 3191da177e4SLinus Torvalds return 0; 3201da177e4SLinus Torvalds } 3211da177e4SLinus Torvalds break; 3221da177e4SLinus Torvalds case opt_quiet: 3231da177e4SLinus Torvalds hsb->s_quiet = 1; 3241da177e4SLinus Torvalds break; 325328b9227SRoman Zippel case opt_codepage: 326328b9227SRoman Zippel if (hsb->nls_disk) { 3277cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to change codepage\n"); 328328b9227SRoman Zippel return 0; 329328b9227SRoman Zippel } 330328b9227SRoman Zippel p = match_strdup(&args[0]); 3313fbe5c31SJim Meyering if (p) 332328b9227SRoman Zippel hsb->nls_disk = load_nls(p); 333328b9227SRoman Zippel if (!hsb->nls_disk) { 3347cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to load codepage \"%s\"\n", p); 335328b9227SRoman Zippel kfree(p); 336328b9227SRoman Zippel return 0; 337328b9227SRoman Zippel } 338328b9227SRoman Zippel kfree(p); 339328b9227SRoman Zippel break; 340328b9227SRoman Zippel case opt_iocharset: 341328b9227SRoman Zippel if (hsb->nls_io) { 3427cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to change iocharset\n"); 343328b9227SRoman Zippel return 0; 344328b9227SRoman Zippel } 345328b9227SRoman Zippel p = match_strdup(&args[0]); 3463fbe5c31SJim Meyering if (p) 347328b9227SRoman Zippel hsb->nls_io = load_nls(p); 348328b9227SRoman Zippel if (!hsb->nls_io) { 3497cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to load iocharset \"%s\"\n", p); 350328b9227SRoman Zippel kfree(p); 351328b9227SRoman Zippel return 0; 352328b9227SRoman Zippel } 353328b9227SRoman Zippel kfree(p); 354328b9227SRoman Zippel break; 3551da177e4SLinus Torvalds default: 3561da177e4SLinus Torvalds return 0; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 360328b9227SRoman Zippel if (hsb->nls_disk && !hsb->nls_io) { 361328b9227SRoman Zippel hsb->nls_io = load_nls_default(); 362328b9227SRoman Zippel if (!hsb->nls_io) { 3637cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to load default iocharset\n"); 364328b9227SRoman Zippel return 0; 365328b9227SRoman Zippel } 366328b9227SRoman Zippel } 3671da177e4SLinus Torvalds hsb->s_dir_umask &= 0777; 3681da177e4SLinus Torvalds hsb->s_file_umask &= 0577; 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds return 1; 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds 3731da177e4SLinus Torvalds /* 3741da177e4SLinus Torvalds * hfs_read_super() 3751da177e4SLinus Torvalds * 3761da177e4SLinus Torvalds * This is the function that is responsible for mounting an HFS 3771da177e4SLinus Torvalds * filesystem. It performs all the tasks necessary to get enough data 3781da177e4SLinus Torvalds * from the disk to read the root inode. This includes parsing the 3791da177e4SLinus Torvalds * mount options, dealing with Macintosh partitions, reading the 3801da177e4SLinus Torvalds * superblock and the allocation bitmap blocks, calling 3811da177e4SLinus Torvalds * hfs_btree_init() to get the necessary data about the extents and 3821da177e4SLinus Torvalds * catalog B-trees and, finally, reading the root inode into memory. 3831da177e4SLinus Torvalds */ 3841da177e4SLinus Torvalds static int hfs_fill_super(struct super_block *sb, void *data, int silent) 3851da177e4SLinus Torvalds { 3861da177e4SLinus Torvalds struct hfs_sb_info *sbi; 3871da177e4SLinus Torvalds struct hfs_find_data fd; 3881da177e4SLinus Torvalds hfs_cat_rec rec; 3891da177e4SLinus Torvalds struct inode *root_inode; 3901da177e4SLinus Torvalds int res; 3911da177e4SLinus Torvalds 392f8314dc6SPanagiotis Issaris sbi = kzalloc(sizeof(struct hfs_sb_info), GFP_KERNEL); 3938526fb37SJan Blunck if (!sbi) 3941da177e4SLinus Torvalds return -ENOMEM; 3958526fb37SJan Blunck 396b16ca626SArtem Bityutskiy sbi->sb = sb; 3971da177e4SLinus Torvalds sb->s_fs_info = sbi; 3985687b578SArtem Bityutskiy spin_lock_init(&sbi->work_lock); 3995687b578SArtem Bityutskiy INIT_DELAYED_WORK(&sbi->mdb_work, flush_mdb); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds res = -EINVAL; 4021da177e4SLinus Torvalds if (!parse_options((char *)data, sbi)) { 4037cf3cc30SRoman Zippel printk(KERN_ERR "hfs: unable to parse mount options.\n"); 404945b0920SColin Leroy goto bail; 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds sb->s_op = &hfs_super_operations; 4081da177e4SLinus Torvalds sb->s_flags |= MS_NODIRATIME; 4093084b72dSMatthias Kaehlcke mutex_init(&sbi->bitmap_lock); 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds res = hfs_mdb_get(sb); 4121da177e4SLinus Torvalds if (res) { 4131da177e4SLinus Torvalds if (!silent) 4147cf3cc30SRoman Zippel printk(KERN_WARNING "hfs: can't find a HFS filesystem on dev %s.\n", 4151da177e4SLinus Torvalds hfs_mdb_name(sb)); 4161da177e4SLinus Torvalds res = -EINVAL; 417945b0920SColin Leroy goto bail; 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 4201da177e4SLinus Torvalds /* try to get the root inode */ 4211da177e4SLinus Torvalds hfs_find_init(HFS_SB(sb)->cat_tree, &fd); 4221da177e4SLinus Torvalds res = hfs_cat_find_brec(sb, HFS_ROOT_CNID, &fd); 423ec81aecbSAmerigo Wang if (!res) { 424ec81aecbSAmerigo Wang if (fd.entrylength > sizeof(rec) || fd.entrylength < 0) { 425ec81aecbSAmerigo Wang res = -EIO; 426ec81aecbSAmerigo Wang goto bail; 427ec81aecbSAmerigo Wang } 4281da177e4SLinus Torvalds hfs_bnode_read(fd.bnode, &rec, fd.entryoffset, fd.entrylength); 429ec81aecbSAmerigo Wang } 4301da177e4SLinus Torvalds if (res) { 4311da177e4SLinus Torvalds hfs_find_exit(&fd); 4321da177e4SLinus Torvalds goto bail_no_root; 4331da177e4SLinus Torvalds } 434d6ddf554SEric Sandeen res = -EINVAL; 4351da177e4SLinus Torvalds root_inode = hfs_iget(sb, &fd.search_key->cat, &rec); 4361da177e4SLinus Torvalds hfs_find_exit(&fd); 4371da177e4SLinus Torvalds if (!root_inode) 4381da177e4SLinus Torvalds goto bail_no_root; 4391da177e4SLinus Torvalds 440518c79d2SAl Viro sb->s_d_op = &hfs_dentry_operations; 441d6ddf554SEric Sandeen res = -ENOMEM; 44248fde701SAl Viro sb->s_root = d_make_root(root_inode); 4431da177e4SLinus Torvalds if (!sb->s_root) 44448fde701SAl Viro goto bail_no_root; 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds /* everything's okay */ 4471da177e4SLinus Torvalds return 0; 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds bail_no_root: 4507cf3cc30SRoman Zippel printk(KERN_ERR "hfs: get root inode failed.\n"); 451945b0920SColin Leroy bail: 4521da177e4SLinus Torvalds hfs_mdb_put(sb); 4531da177e4SLinus Torvalds return res; 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 456152a0836SAl Viro static struct dentry *hfs_mount(struct file_system_type *fs_type, 457152a0836SAl Viro int flags, const char *dev_name, void *data) 4581da177e4SLinus Torvalds { 459152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, hfs_fill_super); 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds 4621da177e4SLinus Torvalds static struct file_system_type hfs_fs_type = { 4631da177e4SLinus Torvalds .owner = THIS_MODULE, 4641da177e4SLinus Torvalds .name = "hfs", 465152a0836SAl Viro .mount = hfs_mount, 4661da177e4SLinus Torvalds .kill_sb = kill_block_super, 4671da177e4SLinus Torvalds .fs_flags = FS_REQUIRES_DEV, 4681da177e4SLinus Torvalds }; 4697f78e035SEric W. Biederman MODULE_ALIAS_FS("hfs"); 4701da177e4SLinus Torvalds 47151cc5068SAlexey Dobriyan static void hfs_init_once(void *p) 4721da177e4SLinus Torvalds { 4731da177e4SLinus Torvalds struct hfs_inode_info *i = p; 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds inode_init_once(&i->vfs_inode); 4761da177e4SLinus Torvalds } 4771da177e4SLinus Torvalds 4781da177e4SLinus Torvalds static int __init init_hfs_fs(void) 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds int err; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds hfs_inode_cachep = kmem_cache_create("hfs_inode_cache", 4831da177e4SLinus Torvalds sizeof(struct hfs_inode_info), 0, SLAB_HWCACHE_ALIGN, 48420c2df83SPaul Mundt hfs_init_once); 4851da177e4SLinus Torvalds if (!hfs_inode_cachep) 4861da177e4SLinus Torvalds return -ENOMEM; 4871da177e4SLinus Torvalds err = register_filesystem(&hfs_fs_type); 4881da177e4SLinus Torvalds if (err) 4891da177e4SLinus Torvalds kmem_cache_destroy(hfs_inode_cachep); 4901da177e4SLinus Torvalds return err; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds static void __exit exit_hfs_fs(void) 4941da177e4SLinus Torvalds { 4951da177e4SLinus Torvalds unregister_filesystem(&hfs_fs_type); 4968c0a8537SKirill A. Shutemov 4978c0a8537SKirill A. Shutemov /* 4988c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 4998c0a8537SKirill A. Shutemov * destroy cache. 5008c0a8537SKirill A. Shutemov */ 5018c0a8537SKirill A. Shutemov rcu_barrier(); 5021a1d92c1SAlexey Dobriyan kmem_cache_destroy(hfs_inode_cachep); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds module_init(init_hfs_fs) 5061da177e4SLinus Torvalds module_exit(exit_hfs_fs) 507