11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * fs/bfs/inode.c 31da177e4SLinus Torvalds * BFS superblock and inode operations. 41da177e4SLinus Torvalds * Copyright (C) 1999,2000 Tigran Aivazian <tigran@veritas.com> 51da177e4SLinus Torvalds * From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds. 6fac92becSAndrew Stribblehill * 7fac92becSAndrew Stribblehill * Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005. 81da177e4SLinus Torvalds */ 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds #include <linux/module.h> 111da177e4SLinus Torvalds #include <linux/mm.h> 121da177e4SLinus Torvalds #include <linux/slab.h> 131da177e4SLinus Torvalds #include <linux/init.h> 141da177e4SLinus Torvalds #include <linux/fs.h> 151da177e4SLinus Torvalds #include <linux/smp_lock.h> 161da177e4SLinus Torvalds #include <linux/buffer_head.h> 171da177e4SLinus Torvalds #include <linux/vfs.h> 181da177e4SLinus Torvalds #include <asm/uaccess.h> 191da177e4SLinus Torvalds #include "bfs.h" 201da177e4SLinus Torvalds 211da177e4SLinus Torvalds MODULE_AUTHOR("Tigran A. Aivazian <tigran@veritas.com>"); 221da177e4SLinus Torvalds MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux"); 231da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds #undef DEBUG 261da177e4SLinus Torvalds 271da177e4SLinus Torvalds #ifdef DEBUG 281da177e4SLinus Torvalds #define dprintf(x...) printf(x) 291da177e4SLinus Torvalds #else 301da177e4SLinus Torvalds #define dprintf(x...) 311da177e4SLinus Torvalds #endif 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds void dump_imap(const char *prefix, struct super_block * s); 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds static void bfs_read_inode(struct inode * inode) 361da177e4SLinus Torvalds { 371da177e4SLinus Torvalds unsigned long ino = inode->i_ino; 381da177e4SLinus Torvalds struct bfs_inode * di; 391da177e4SLinus Torvalds struct buffer_head * bh; 401da177e4SLinus Torvalds int block, off; 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds if (ino < BFS_ROOT_INO || ino > BFS_SB(inode->i_sb)->si_lasti) { 431da177e4SLinus Torvalds printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino); 441da177e4SLinus Torvalds make_bad_inode(inode); 451da177e4SLinus Torvalds return; 461da177e4SLinus Torvalds } 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1; 491da177e4SLinus Torvalds bh = sb_bread(inode->i_sb, block); 501da177e4SLinus Torvalds if (!bh) { 511da177e4SLinus Torvalds printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino); 521da177e4SLinus Torvalds make_bad_inode(inode); 531da177e4SLinus Torvalds return; 541da177e4SLinus Torvalds } 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; 571da177e4SLinus Torvalds di = (struct bfs_inode *)bh->b_data + off; 581da177e4SLinus Torvalds 59fac92becSAndrew Stribblehill inode->i_mode = 0x0000FFFF & le32_to_cpu(di->i_mode); 60fac92becSAndrew Stribblehill if (le32_to_cpu(di->i_vtype) == BFS_VDIR) { 611da177e4SLinus Torvalds inode->i_mode |= S_IFDIR; 621da177e4SLinus Torvalds inode->i_op = &bfs_dir_inops; 631da177e4SLinus Torvalds inode->i_fop = &bfs_dir_operations; 64fac92becSAndrew Stribblehill } else if (le32_to_cpu(di->i_vtype) == BFS_VREG) { 651da177e4SLinus Torvalds inode->i_mode |= S_IFREG; 661da177e4SLinus Torvalds inode->i_op = &bfs_file_inops; 671da177e4SLinus Torvalds inode->i_fop = &bfs_file_operations; 681da177e4SLinus Torvalds inode->i_mapping->a_ops = &bfs_aops; 691da177e4SLinus Torvalds } 701da177e4SLinus Torvalds 71fac92becSAndrew Stribblehill BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock); 72fac92becSAndrew Stribblehill BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock); 73fac92becSAndrew Stribblehill inode->i_uid = le32_to_cpu(di->i_uid); 74fac92becSAndrew Stribblehill inode->i_gid = le32_to_cpu(di->i_gid); 75fac92becSAndrew Stribblehill inode->i_nlink = le32_to_cpu(di->i_nlink); 761da177e4SLinus Torvalds inode->i_size = BFS_FILESIZE(di); 771da177e4SLinus Torvalds inode->i_blocks = BFS_FILEBLOCKS(di); 78fac92becSAndrew Stribblehill if (inode->i_size || inode->i_blocks) dprintf("Registered inode with %lld size, %ld blocks\n", inode->i_size, inode->i_blocks); 791da177e4SLinus Torvalds inode->i_blksize = PAGE_SIZE; 80fac92becSAndrew Stribblehill inode->i_atime.tv_sec = le32_to_cpu(di->i_atime); 81fac92becSAndrew Stribblehill inode->i_mtime.tv_sec = le32_to_cpu(di->i_mtime); 82fac92becSAndrew Stribblehill inode->i_ctime.tv_sec = le32_to_cpu(di->i_ctime); 831da177e4SLinus Torvalds inode->i_atime.tv_nsec = 0; 841da177e4SLinus Torvalds inode->i_mtime.tv_nsec = 0; 851da177e4SLinus Torvalds inode->i_ctime.tv_nsec = 0; 86fac92becSAndrew Stribblehill BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); /* can be 0 so we store a copy */ 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds brelse(bh); 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds static int bfs_write_inode(struct inode * inode, int unused) 921da177e4SLinus Torvalds { 93fac92becSAndrew Stribblehill unsigned int ino = (u16)inode->i_ino; 94fac92becSAndrew Stribblehill unsigned long i_sblock; 951da177e4SLinus Torvalds struct bfs_inode * di; 961da177e4SLinus Torvalds struct buffer_head * bh; 971da177e4SLinus Torvalds int block, off; 981da177e4SLinus Torvalds 99fac92becSAndrew Stribblehill dprintf("ino=%08x\n", ino); 100fac92becSAndrew Stribblehill 1011da177e4SLinus Torvalds if (ino < BFS_ROOT_INO || ino > BFS_SB(inode->i_sb)->si_lasti) { 102fac92becSAndrew Stribblehill printf("Bad inode number %s:%08x\n", inode->i_sb->s_id, ino); 1031da177e4SLinus Torvalds return -EIO; 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds lock_kernel(); 1071da177e4SLinus Torvalds block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1; 1081da177e4SLinus Torvalds bh = sb_bread(inode->i_sb, block); 1091da177e4SLinus Torvalds if (!bh) { 110fac92becSAndrew Stribblehill printf("Unable to read inode %s:%08x\n", inode->i_sb->s_id, ino); 1111da177e4SLinus Torvalds unlock_kernel(); 1121da177e4SLinus Torvalds return -EIO; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK; 1161da177e4SLinus Torvalds di = (struct bfs_inode *)bh->b_data + off; 1171da177e4SLinus Torvalds 118fac92becSAndrew Stribblehill if (ino == BFS_ROOT_INO) 119fac92becSAndrew Stribblehill di->i_vtype = cpu_to_le32(BFS_VDIR); 1201da177e4SLinus Torvalds else 121fac92becSAndrew Stribblehill di->i_vtype = cpu_to_le32(BFS_VREG); 1221da177e4SLinus Torvalds 123fac92becSAndrew Stribblehill di->i_ino = cpu_to_le16(ino); 124fac92becSAndrew Stribblehill di->i_mode = cpu_to_le32(inode->i_mode); 125fac92becSAndrew Stribblehill di->i_uid = cpu_to_le32(inode->i_uid); 126fac92becSAndrew Stribblehill di->i_gid = cpu_to_le32(inode->i_gid); 127fac92becSAndrew Stribblehill di->i_nlink = cpu_to_le32(inode->i_nlink); 128fac92becSAndrew Stribblehill di->i_atime = cpu_to_le32(inode->i_atime.tv_sec); 129fac92becSAndrew Stribblehill di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); 130fac92becSAndrew Stribblehill di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); 131fac92becSAndrew Stribblehill i_sblock = BFS_I(inode)->i_sblock; 132fac92becSAndrew Stribblehill di->i_sblock = cpu_to_le32(i_sblock); 133fac92becSAndrew Stribblehill di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); 134fac92becSAndrew Stribblehill di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds mark_buffer_dirty(bh); 137fac92becSAndrew Stribblehill dprintf("Written ino=%d into %d:%d\n",le16_to_cpu(di->i_ino),block,off); 1381da177e4SLinus Torvalds brelse(bh); 1391da177e4SLinus Torvalds unlock_kernel(); 1401da177e4SLinus Torvalds return 0; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static void bfs_delete_inode(struct inode * inode) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds unsigned long ino = inode->i_ino; 1461da177e4SLinus Torvalds struct bfs_inode * di; 1471da177e4SLinus Torvalds struct buffer_head * bh; 1481da177e4SLinus Torvalds int block, off; 1491da177e4SLinus Torvalds struct super_block * s = inode->i_sb; 1501da177e4SLinus Torvalds struct bfs_sb_info * info = BFS_SB(s); 151fac92becSAndrew Stribblehill struct bfs_inode_info * bi = BFS_I(inode); 1521da177e4SLinus Torvalds 153fac92becSAndrew Stribblehill dprintf("ino=%08lx\n", ino); 1541da177e4SLinus Torvalds 155fef26658SMark Fasheh truncate_inode_pages(&inode->i_data, 0); 156fef26658SMark Fasheh 157fac92becSAndrew Stribblehill if (ino < BFS_ROOT_INO || ino > info->si_lasti) { 158fac92becSAndrew Stribblehill printf("invalid ino=%08lx\n", ino); 1591da177e4SLinus Torvalds return; 1601da177e4SLinus Torvalds } 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvalds inode->i_size = 0; 1631da177e4SLinus Torvalds inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; 1641da177e4SLinus Torvalds lock_kernel(); 1651da177e4SLinus Torvalds mark_inode_dirty(inode); 1661da177e4SLinus Torvalds block = (ino - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1; 1671da177e4SLinus Torvalds bh = sb_bread(s, block); 1681da177e4SLinus Torvalds if (!bh) { 1691da177e4SLinus Torvalds printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, ino); 1701da177e4SLinus Torvalds unlock_kernel(); 1711da177e4SLinus Torvalds return; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds off = (ino - BFS_ROOT_INO)%BFS_INODES_PER_BLOCK; 1741da177e4SLinus Torvalds di = (struct bfs_inode *) bh->b_data + off; 175fac92becSAndrew Stribblehill if (bi->i_dsk_ino) { 176fac92becSAndrew Stribblehill info->si_freeb += 1 + bi->i_eblock - bi->i_sblock; 1771da177e4SLinus Torvalds info->si_freei++; 178fac92becSAndrew Stribblehill clear_bit(ino, info->si_imap); 1791da177e4SLinus Torvalds dump_imap("delete_inode", s); 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds di->i_ino = 0; 1821da177e4SLinus Torvalds di->i_sblock = 0; 1831da177e4SLinus Torvalds mark_buffer_dirty(bh); 1841da177e4SLinus Torvalds brelse(bh); 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* if this was the last file, make the previous 1871da177e4SLinus Torvalds block "last files last block" even if there is no real file there, 1881da177e4SLinus Torvalds saves us 1 gap */ 1891da177e4SLinus Torvalds if (info->si_lf_eblk == BFS_I(inode)->i_eblock) { 1901da177e4SLinus Torvalds info->si_lf_eblk = BFS_I(inode)->i_sblock - 1; 1911da177e4SLinus Torvalds mark_buffer_dirty(info->si_sbh); 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds unlock_kernel(); 1941da177e4SLinus Torvalds clear_inode(inode); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds static void bfs_put_super(struct super_block *s) 1981da177e4SLinus Torvalds { 1991da177e4SLinus Torvalds struct bfs_sb_info *info = BFS_SB(s); 2001da177e4SLinus Torvalds brelse(info->si_sbh); 2011da177e4SLinus Torvalds kfree(info->si_imap); 2021da177e4SLinus Torvalds kfree(info); 2031da177e4SLinus Torvalds s->s_fs_info = NULL; 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds static int bfs_statfs(struct super_block *s, struct kstatfs *buf) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct bfs_sb_info *info = BFS_SB(s); 2091da177e4SLinus Torvalds u64 id = huge_encode_dev(s->s_bdev->bd_dev); 2101da177e4SLinus Torvalds buf->f_type = BFS_MAGIC; 2111da177e4SLinus Torvalds buf->f_bsize = s->s_blocksize; 2121da177e4SLinus Torvalds buf->f_blocks = info->si_blocks; 2131da177e4SLinus Torvalds buf->f_bfree = buf->f_bavail = info->si_freeb; 2141da177e4SLinus Torvalds buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; 2151da177e4SLinus Torvalds buf->f_ffree = info->si_freei; 2161da177e4SLinus Torvalds buf->f_fsid.val[0] = (u32)id; 2171da177e4SLinus Torvalds buf->f_fsid.val[1] = (u32)(id >> 32); 2181da177e4SLinus Torvalds buf->f_namelen = BFS_NAMELEN; 2191da177e4SLinus Torvalds return 0; 2201da177e4SLinus Torvalds } 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds static void bfs_write_super(struct super_block *s) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds lock_kernel(); 2251da177e4SLinus Torvalds if (!(s->s_flags & MS_RDONLY)) 2261da177e4SLinus Torvalds mark_buffer_dirty(BFS_SB(s)->si_sbh); 2271da177e4SLinus Torvalds s->s_dirt = 0; 2281da177e4SLinus Torvalds unlock_kernel(); 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds static kmem_cache_t * bfs_inode_cachep; 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds static struct inode *bfs_alloc_inode(struct super_block *sb) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds struct bfs_inode_info *bi; 2361da177e4SLinus Torvalds bi = kmem_cache_alloc(bfs_inode_cachep, SLAB_KERNEL); 2371da177e4SLinus Torvalds if (!bi) 2381da177e4SLinus Torvalds return NULL; 2391da177e4SLinus Torvalds return &bi->vfs_inode; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds static void bfs_destroy_inode(struct inode *inode) 2431da177e4SLinus Torvalds { 2441da177e4SLinus Torvalds kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) 2481da177e4SLinus Torvalds { 2491da177e4SLinus Torvalds struct bfs_inode_info *bi = foo; 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 2521da177e4SLinus Torvalds SLAB_CTOR_CONSTRUCTOR) 2531da177e4SLinus Torvalds inode_init_once(&bi->vfs_inode); 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds static int init_inodecache(void) 2571da177e4SLinus Torvalds { 2581da177e4SLinus Torvalds bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", 2591da177e4SLinus Torvalds sizeof(struct bfs_inode_info), 2601da177e4SLinus Torvalds 0, SLAB_RECLAIM_ACCOUNT, 2611da177e4SLinus Torvalds init_once, NULL); 2621da177e4SLinus Torvalds if (bfs_inode_cachep == NULL) 2631da177e4SLinus Torvalds return -ENOMEM; 2641da177e4SLinus Torvalds return 0; 2651da177e4SLinus Torvalds } 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds static void destroy_inodecache(void) 2681da177e4SLinus Torvalds { 2691da177e4SLinus Torvalds if (kmem_cache_destroy(bfs_inode_cachep)) 2701da177e4SLinus Torvalds printk(KERN_INFO "bfs_inode_cache: not all structures were freed\n"); 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds static struct super_operations bfs_sops = { 2741da177e4SLinus Torvalds .alloc_inode = bfs_alloc_inode, 2751da177e4SLinus Torvalds .destroy_inode = bfs_destroy_inode, 2761da177e4SLinus Torvalds .read_inode = bfs_read_inode, 2771da177e4SLinus Torvalds .write_inode = bfs_write_inode, 2781da177e4SLinus Torvalds .delete_inode = bfs_delete_inode, 2791da177e4SLinus Torvalds .put_super = bfs_put_super, 2801da177e4SLinus Torvalds .write_super = bfs_write_super, 2811da177e4SLinus Torvalds .statfs = bfs_statfs, 2821da177e4SLinus Torvalds }; 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds void dump_imap(const char *prefix, struct super_block * s) 2851da177e4SLinus Torvalds { 286fac92becSAndrew Stribblehill #ifdef DEBUG 2871da177e4SLinus Torvalds int i; 2881da177e4SLinus Torvalds char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL); 2891da177e4SLinus Torvalds 2901da177e4SLinus Torvalds if (!tmpbuf) 2911da177e4SLinus Torvalds return; 2921da177e4SLinus Torvalds for (i=BFS_SB(s)->si_lasti; i>=0; i--) { 2931da177e4SLinus Torvalds if (i > PAGE_SIZE-100) break; 2941da177e4SLinus Torvalds if (test_bit(i, BFS_SB(s)->si_imap)) 2951da177e4SLinus Torvalds strcat(tmpbuf, "1"); 2961da177e4SLinus Torvalds else 2971da177e4SLinus Torvalds strcat(tmpbuf, "0"); 2981da177e4SLinus Torvalds } 2991da177e4SLinus Torvalds printk(KERN_ERR "BFS-fs: %s: lasti=%08lx <%s>\n", prefix, BFS_SB(s)->si_lasti, tmpbuf); 3001da177e4SLinus Torvalds free_page((unsigned long)tmpbuf); 3011da177e4SLinus Torvalds #endif 3021da177e4SLinus Torvalds } 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds static int bfs_fill_super(struct super_block *s, void *data, int silent) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds struct buffer_head * bh; 3071da177e4SLinus Torvalds struct bfs_super_block * bfs_sb; 3081da177e4SLinus Torvalds struct inode * inode; 309fac92becSAndrew Stribblehill unsigned i, imap_len; 3101da177e4SLinus Torvalds struct bfs_sb_info * info; 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds info = kmalloc(sizeof(*info), GFP_KERNEL); 3131da177e4SLinus Torvalds if (!info) 3141da177e4SLinus Torvalds return -ENOMEM; 3151da177e4SLinus Torvalds s->s_fs_info = info; 3161da177e4SLinus Torvalds memset(info, 0, sizeof(*info)); 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvalds sb_set_blocksize(s, BFS_BSIZE); 3191da177e4SLinus Torvalds 3201da177e4SLinus Torvalds bh = sb_bread(s, 0); 3211da177e4SLinus Torvalds if(!bh) 3221da177e4SLinus Torvalds goto out; 3231da177e4SLinus Torvalds bfs_sb = (struct bfs_super_block *)bh->b_data; 324fac92becSAndrew Stribblehill if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { 3251da177e4SLinus Torvalds if (!silent) 3261da177e4SLinus Torvalds printf("No BFS filesystem on %s (magic=%08x)\n", 327fac92becSAndrew Stribblehill s->s_id, le32_to_cpu(bfs_sb->s_magic)); 3281da177e4SLinus Torvalds goto out; 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds if (BFS_UNCLEAN(bfs_sb, s) && !silent) 3311da177e4SLinus Torvalds printf("%s is unclean, continuing\n", s->s_id); 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds s->s_magic = BFS_MAGIC; 3341da177e4SLinus Torvalds info->si_sbh = bh; 335fac92becSAndrew Stribblehill info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE)/sizeof(struct bfs_inode) 3361da177e4SLinus Torvalds + BFS_ROOT_INO - 1; 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds imap_len = info->si_lasti/8 + 1; 3391da177e4SLinus Torvalds info->si_imap = kmalloc(imap_len, GFP_KERNEL); 3401da177e4SLinus Torvalds if (!info->si_imap) 3411da177e4SLinus Torvalds goto out; 3421da177e4SLinus Torvalds memset(info->si_imap, 0, imap_len); 3431da177e4SLinus Torvalds for (i=0; i<BFS_ROOT_INO; i++) 3441da177e4SLinus Torvalds set_bit(i, info->si_imap); 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds s->s_op = &bfs_sops; 3471da177e4SLinus Torvalds inode = iget(s, BFS_ROOT_INO); 3481da177e4SLinus Torvalds if (!inode) { 3491da177e4SLinus Torvalds kfree(info->si_imap); 3501da177e4SLinus Torvalds goto out; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds s->s_root = d_alloc_root(inode); 3531da177e4SLinus Torvalds if (!s->s_root) { 3541da177e4SLinus Torvalds iput(inode); 3551da177e4SLinus Torvalds kfree(info->si_imap); 3561da177e4SLinus Torvalds goto out; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 359fac92becSAndrew Stribblehill info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1)>>BFS_BSIZE_BITS; /* for statfs(2) */ 360ce0fe7e7SAlexey Dobriyan info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 - le32_to_cpu(bfs_sb->s_start))>>BFS_BSIZE_BITS; 3611da177e4SLinus Torvalds info->si_freei = 0; 3621da177e4SLinus Torvalds info->si_lf_eblk = 0; 3631da177e4SLinus Torvalds info->si_lf_sblk = 0; 3641da177e4SLinus Torvalds info->si_lf_ioff = 0; 365c2b513dfSAl Viro bh = NULL; 3661da177e4SLinus Torvalds for (i=BFS_ROOT_INO; i<=info->si_lasti; i++) { 367c2b513dfSAl Viro struct bfs_inode *di; 368c2b513dfSAl Viro int block = (i - BFS_ROOT_INO)/BFS_INODES_PER_BLOCK + 1; 369c2b513dfSAl Viro int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; 370c2b513dfSAl Viro unsigned long sblock, eblock; 371c2b513dfSAl Viro 372c2b513dfSAl Viro if (!off) { 373c2b513dfSAl Viro brelse(bh); 374c2b513dfSAl Viro bh = sb_bread(s, block); 375c2b513dfSAl Viro } 376c2b513dfSAl Viro 377c2b513dfSAl Viro if (!bh) 378c2b513dfSAl Viro continue; 379c2b513dfSAl Viro 380c2b513dfSAl Viro di = (struct bfs_inode *)bh->b_data + off; 381c2b513dfSAl Viro 382c2b513dfSAl Viro if (!di->i_ino) { 3831da177e4SLinus Torvalds info->si_freei++; 384c2b513dfSAl Viro continue; 385c2b513dfSAl Viro } 3861da177e4SLinus Torvalds set_bit(i, info->si_imap); 387c2b513dfSAl Viro info->si_freeb -= BFS_FILEBLOCKS(di); 388c2b513dfSAl Viro 389c2b513dfSAl Viro sblock = le32_to_cpu(di->i_sblock); 390c2b513dfSAl Viro eblock = le32_to_cpu(di->i_eblock); 391c2b513dfSAl Viro if (eblock > info->si_lf_eblk) { 392c2b513dfSAl Viro info->si_lf_eblk = eblock; 393c2b513dfSAl Viro info->si_lf_sblk = sblock; 3941da177e4SLinus Torvalds info->si_lf_ioff = BFS_INO2OFF(i); 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds } 397c2b513dfSAl Viro brelse(bh); 3981da177e4SLinus Torvalds if (!(s->s_flags & MS_RDONLY)) { 399c2b513dfSAl Viro mark_buffer_dirty(info->si_sbh); 4001da177e4SLinus Torvalds s->s_dirt = 1; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds dump_imap("read_super", s); 4031da177e4SLinus Torvalds return 0; 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds out: 4061da177e4SLinus Torvalds brelse(bh); 4071da177e4SLinus Torvalds kfree(info); 4081da177e4SLinus Torvalds s->s_fs_info = NULL; 4091da177e4SLinus Torvalds return -EINVAL; 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds static struct super_block *bfs_get_sb(struct file_system_type *fs_type, 4131da177e4SLinus Torvalds int flags, const char *dev_name, void *data) 4141da177e4SLinus Torvalds { 4151da177e4SLinus Torvalds return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super); 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds static struct file_system_type bfs_fs_type = { 4191da177e4SLinus Torvalds .owner = THIS_MODULE, 4201da177e4SLinus Torvalds .name = "bfs", 4211da177e4SLinus Torvalds .get_sb = bfs_get_sb, 4221da177e4SLinus Torvalds .kill_sb = kill_block_super, 4231da177e4SLinus Torvalds .fs_flags = FS_REQUIRES_DEV, 4241da177e4SLinus Torvalds }; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds static int __init init_bfs_fs(void) 4271da177e4SLinus Torvalds { 4281da177e4SLinus Torvalds int err = init_inodecache(); 4291da177e4SLinus Torvalds if (err) 4301da177e4SLinus Torvalds goto out1; 4311da177e4SLinus Torvalds err = register_filesystem(&bfs_fs_type); 4321da177e4SLinus Torvalds if (err) 4331da177e4SLinus Torvalds goto out; 4341da177e4SLinus Torvalds return 0; 4351da177e4SLinus Torvalds out: 4361da177e4SLinus Torvalds destroy_inodecache(); 4371da177e4SLinus Torvalds out1: 4381da177e4SLinus Torvalds return err; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds static void __exit exit_bfs_fs(void) 4421da177e4SLinus Torvalds { 4431da177e4SLinus Torvalds unregister_filesystem(&bfs_fs_type); 4441da177e4SLinus Torvalds destroy_inodecache(); 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds module_init(init_bfs_fs) 4481da177e4SLinus Torvalds module_exit(exit_bfs_fs) 449