static int affs_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); struct super_block *sb = inode->i_sb; struct buffer_head *dir_bh = NULL; struct buffer_head *fh_bh = NULL; unsigned char *name; int namelen; u32 i; int hash_pos; int chain_pos; u32 ino; int error = 0; pr_debug("%s(ino=%lu,f_pos=%llx)\n", __func__, inode->i_ino, ctx->pos); if (ctx->pos < 2) { file->private_data = (void *)0; if (!dir_emit_dots(file, ctx)) return 0; } affs_lock_dir(inode); chain_pos = (ctx->pos - 2) & 0xffff; hash_pos = (ctx->pos - 2) >> 16; if (chain_pos == 0xffff) { affs_warning(sb, "readdir", "More than 65535 entries in chain"); chain_pos = 0; hash_pos++; ctx->pos = ((hash_pos << 16) | chain_pos) + 2; } dir_bh = affs_bread(sb, inode->i_ino); if (!dir_bh) goto out_unlock_dir; /* If the directory hasn't changed since the last call to readdir(), * we can jump directly to where we left off. */ ino = (u32)(long)file->private_data; if (ino && file->f_version == inode->i_version) { pr_debug("readdir() left off=%d\n", ino); goto inside; } ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); for (i = 0; ino && i < chain_pos; i++) { fh_bh = affs_bread(sb, ino); if (!fh_bh) { affs_error(sb, "readdir","Cannot read block %d", i); error = -EIO; goto out_brelse_dir; } ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); affs_brelse(fh_bh); fh_bh = NULL; } if (ino) goto inside; hash_pos++; for (; hash_pos < AFFS_SB(sb)->s_hashsize; hash_pos++) { ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); if (!ino) continue; ctx->pos = (hash_pos << 16) + 2; inside: do { fh_bh = affs_bread(sb, ino); if (!fh_bh) { affs_error(sb, "readdir", "Cannot read block %d", ino); break; } namelen = min(AFFS_TAIL(sb, fh_bh)->name[0], (u8)AFFSNAMEMAX); name = AFFS_TAIL(sb, fh_bh)->name + 1; pr_debug("readdir(): dir_emit(\"%.*s\", ino=%u), hash=%d, f_pos=%llx\n", namelen, name, ino, hash_pos, ctx->pos); if (!dir_emit(ctx, name, namelen, ino, DT_UNKNOWN)) goto done; ctx->pos++; ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); affs_brelse(fh_bh); fh_bh = NULL; } while (ino); } done: file->f_version = inode->i_version; file->private_data = (void *)(long)ino; affs_brelse(fh_bh); out_brelse_dir: affs_brelse(dir_bh); out_unlock_dir: affs_unlock_dir(inode); return error; }
struct inode *affs_iget(struct super_block *sb, unsigned long ino) { struct affs_sb_info *sbi = AFFS_SB(sb); struct buffer_head *bh; // struct affs_head *head; struct affs_tail *tail; struct inode *inode; u32 block; u32 size; u32 prot; u16 id; inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino); block = inode->i_ino; bh = affs_bread(sb, block); if (!bh) { affs_warning(sb, "read_inode", "Cannot read block %d", block); goto bad_inode; } if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { affs_warning(sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d", AFFS_HEAD(bh)->ptype, block); goto bad_inode; } // head = AFFS_HEAD(bh); tail = AFFS_TAIL(sb, bh); prot = be32_to_cpu(tail->protect); inode->i_size = 0; inode->i_nlink = 1; inode->i_mode = 0; AFFS_I(inode)->i_extcnt = 1; AFFS_I(inode)->i_ext_last = ~1; AFFS_I(inode)->i_protect = prot; atomic_set(&AFFS_I(inode)->i_opencnt, 0); AFFS_I(inode)->i_blkcnt = 0; AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_lc_size = 0; AFFS_I(inode)->i_lc_shift = 0; AFFS_I(inode)->i_lc_mask = 0; AFFS_I(inode)->i_ac = NULL; AFFS_I(inode)->i_ext_bh = NULL; AFFS_I(inode)->mmu_private = 0; AFFS_I(inode)->i_lastalloc = 0; AFFS_I(inode)->i_pa_cnt = 0; if (sbi->s_flags & SF_SETMODE) inode->i_mode = sbi->s_mode; else inode->i_mode = prot_to_mode(prot); id = be16_to_cpu(tail->uid); if (id == 0 || sbi->s_flags & SF_SETUID) inode->i_uid = sbi->s_uid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(tail->gid); if (id == 0 || sbi->s_flags & SF_SETGID) inode->i_gid = sbi->s_gid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(tail->stype)) { case ST_ROOT: inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; /* fall through */ case ST_USERDIR: if (be32_to_cpu(tail->stype) == ST_USERDIR || sbi->s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; /* Maybe it should be controlled by mount parameter? */ //inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; inode->i_fop = &affs_dir_operations; break; case ST_LINKDIR: #if 0 affs_warning(sb, "read_inode", "inode is LINKDIR"); goto bad_inode; #else inode->i_mode |= S_IFDIR; /* ... and leave ->i_op and ->i_fop pointing to empty */ break; #endif case ST_LINKFILE: affs_warning(sb, "read_inode", "inode is LINKFILE"); goto bad_inode; case ST_FILE: size = be32_to_cpu(tail->size); inode->i_mode |= S_IFREG; AFFS_I(inode)->mmu_private = inode->i_size = size; if (inode->i_size) { AFFS_I(inode)->i_blkcnt = (size - 1) / sbi->s_data_blksize + 1; AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / sbi->s_hashsize + 1; } if (tail->link_chain) inode->i_nlink = 2; inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops; inode->i_op = &affs_file_inode_operations; inode->i_fop = &affs_file_operations; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_op = &affs_symlink_inode_operations; inode->i_data.a_ops = &affs_symlink_aops; break; } inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; affs_brelse(bh); unlock_new_inode(inode); return inode; bad_inode: affs_brelse(bh); iget_failed(inode); return ERR_PTR(-EIO); }
int affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { struct buffer_head *bh; struct inode *inode; char *p; unsigned long tmp; int i, maxlen, error; char c, lc; pr_debug("AFFS: symlink(%lu,\"%.*s\" -> \"%s\")\n",dir->i_ino, (int)dentry->d_name.len,dentry->d_name.name,symname); maxlen = 4 * AFFS_I2HSIZE(dir) - 1; error = -ENOSPC; inode = affs_new_inode(dir); if (!inode) goto out; inode->i_op = &affs_symlink_inode_operations; inode->i_mode = S_IFLNK | 0777; inode->u.affs_i.i_protect = mode_to_prot(inode->i_mode); error = -EIO; bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode)); if (!bh) goto out_iput; i = 0; p = ((struct slink_front *)bh->b_data)->symname; lc = '/'; if (*symname == '/') { while (*symname == '/') symname++; while (inode->i_sb->u.affs_sb.s_volume[i]) /* Cannot overflow */ *p++ = inode->i_sb->u.affs_sb.s_volume[i++]; } while (i < maxlen && (c = *symname++)) { if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') { *p++ = '/'; i++; symname += 2; lc = '/'; } else if (c == '.' && lc == '/' && *symname == '/') { symname++; lc = '/'; } else { *p++ = c; lc = c; i++; } if (lc == '/') while (*symname == '/') symname++; } *p = 0; mark_buffer_dirty(bh,1); affs_brelse(bh); mark_inode_dirty(inode); /* N.B. This test shouldn't be necessary ... dentry must be negative */ error = -EEXIST; bh = affs_find_entry(dir,dentry,&tmp); if (bh) goto out_release; /* N.B. Shouldn't we add the entry before dirtying the buffer? */ error = affs_add_entry(dir,NULL,inode,dentry,ST_SOFTLINK); if (error) goto out_release; d_instantiate(dentry,inode); dir->i_version = ++event; mark_inode_dirty(dir); out: return error; out_release: affs_brelse(bh); out_iput: inode->i_nlink = 0; mark_inode_dirty(inode); iput(inode); goto out; }
static struct super_block * affs_read_super(struct super_block *sb, void *data, int silent) { struct buffer_head *root_bh = NULL; struct buffer_head *boot_bh; struct inode *root_inode = NULL; kdev_t dev = sb->s_dev; s32 root_block; int blocks, size, blocksize; u32 chksum; int num_bm; int i, j; s32 key; uid_t uid; gid_t gid; int reserved; unsigned long mount_flags; pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options"); sb->s_magic = AFFS_SUPER_MAGIC; sb->s_op = &affs_sops; memset(AFFS_SB, 0, sizeof(struct affs_sb_info)); init_MUTEX(&AFFS_SB->s_bmlock); if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, &blocksize,&AFFS_SB->s_prefix, AFFS_SB->s_volume, &mount_flags)) { printk(KERN_ERR "AFFS: Error parsing options\n"); return NULL; } /* N.B. after this point s_prefix must be released */ AFFS_SB->s_flags = mount_flags; AFFS_SB->s_mode = i; AFFS_SB->s_uid = uid; AFFS_SB->s_gid = gid; AFFS_SB->s_reserved= reserved; /* Get the size of the device in 512-byte blocks. * If we later see that the partition uses bigger * blocks, we will have to change it. */ blocks = blk_size[MAJOR(dev)] ? blk_size[MAJOR(dev)][MINOR(dev)] : 0; if (!blocks) { printk(KERN_ERR "AFFS: Could not determine device size\n"); goto out_error; } size = (BLOCK_SIZE / 512) * blocks; pr_debug("AFFS: initial blksize=%d, blocks=%d\n", 512, blocks); affs_set_blocksize(sb, PAGE_SIZE); /* Try to find root block. Its location depends on the block size. */ i = 512; j = 4096; if (blocksize > 0) { i = j = blocksize; size = size / (blocksize / 512); } for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) { AFFS_SB->s_root_block = root_block; if (root_block < 0) AFFS_SB->s_root_block = (reserved + size - 1) / 2; pr_debug("AFFS: setting blocksize to %d\n", blocksize); affs_set_blocksize(sb, blocksize); AFFS_SB->s_partition_size = size; /* The root block location that was calculated above is not * correct if the partition size is an odd number of 512- * byte blocks, which will be rounded down to a number of * 1024-byte blocks, and if there were an even number of * reserved blocks. Ideally, all partition checkers should * report the real number of blocks of the real blocksize, * but since this just cannot be done, we have to try to * find the root block anyways. In the above case, it is one * block behind the calculated one. So we check this one, too. */ for (num_bm = 0; num_bm < 2; num_bm++) { pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, " "size=%d, reserved=%d\n", kdevname(dev), AFFS_SB->s_root_block + num_bm, blocksize, size, reserved); root_bh = affs_bread(sb, AFFS_SB->s_root_block + num_bm); if (!root_bh) continue; if (!affs_checksum_block(sb, root_bh) && be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT && be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) { AFFS_SB->s_hashsize = blocksize / 4 - 56; AFFS_SB->s_root_block += num_bm; key = 1; goto got_root; } affs_brelse(root_bh); root_bh = NULL; } } if (!silent) printk(KERN_ERR "AFFS: No valid root block on device %s\n", kdevname(dev)); goto out_error; /* N.B. after this point bh must be released */ got_root: root_block = AFFS_SB->s_root_block; sb->s_blocksize_bits = blocksize == 512 ? 9 : blocksize == 1024 ? 10 : blocksize == 2048 ? 11 : 12; /* Find out which kind of FS we have */ boot_bh = bread(sb->s_dev, 0, sb->s_blocksize); if (!boot_bh) { printk(KERN_ERR "AFFS: Cannot read boot block\n"); goto out_error; } chksum = be32_to_cpu(*(u32 *)boot_bh->b_data); brelse(boot_bh); /* Dircache filesystems are compatible with non-dircache ones * when reading. As long as they aren't supported, writing is * not recommended. */ if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) { printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n", kdevname(dev)); sb->s_flags |= MS_RDONLY; AFFS_SB->s_flags |= SF_READONLY; } switch (chksum) { case MUFS_FS: case MUFS_INTLFFS: case MUFS_DCFFS: AFFS_SB->s_flags |= SF_MUFS; /* fall thru */ case FS_INTLFFS: case FS_DCFFS: AFFS_SB->s_flags |= SF_INTL; break; case MUFS_FFS: AFFS_SB->s_flags |= SF_MUFS; break; case FS_FFS: break; case MUFS_OFS: AFFS_SB->s_flags |= SF_MUFS; /* fall thru */ case FS_OFS: AFFS_SB->s_flags |= SF_OFS; sb->s_flags |= MS_NOEXEC; break; case MUFS_DCOFS: case MUFS_INTLOFS: AFFS_SB->s_flags |= SF_MUFS; case FS_DCOFS: case FS_INTLOFS: AFFS_SB->s_flags |= SF_INTL | SF_OFS; sb->s_flags |= MS_NOEXEC; break; default: printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n", kdevname(dev), chksum); goto out_error; } if (mount_flags & SF_VERBOSE) { chksum = cpu_to_be32(chksum); printk(KERN_NOTICE "AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n", AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0], AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1, (char *)&chksum,((char *)&chksum)[3] + '0',blocksize); } sb->s_flags |= MS_NODEV | MS_NOSUID; AFFS_SB->s_data_blksize = sb->s_blocksize; if (AFFS_SB->s_flags & SF_OFS) AFFS_SB->s_data_blksize -= 24; /* Keep super block in cache */ AFFS_SB->s_root_bh = root_bh; /* N.B. after this point s_root_bh must be released */ if (affs_init_bitmap(sb)) goto out_error; /* set up enough so that it can read an inode */ root_inode = iget(sb, root_block); sb->s_root = d_alloc_root(root_inode); if (!sb->s_root) { printk(KERN_ERR "AFFS: Get root inode failed\n"); goto out_error; } sb->s_root->d_op = &affs_dentry_operations; pr_debug("AFFS: s_flags=%lX\n",sb->s_flags); return sb; /* * Begin the cascaded cleanup ... */ out_error: if (root_inode) iput(root_inode); if (AFFS_SB->s_bitmap) kfree(AFFS_SB->s_bitmap); affs_brelse(root_bh); if (AFFS_SB->s_prefix) kfree(AFFS_SB->s_prefix); return NULL; }
int affs_add_entry(struct inode *dir, struct inode *link, struct inode *inode, struct dentry *dentry, int type) { struct buffer_head *dir_bh; struct buffer_head *inode_bh; struct buffer_head *link_bh; int retval; const unsigned char *name = dentry->d_name.name; int len = dentry->d_name.len; pr_debug("AFFS: add_entry(dir=%lu,inode=%lu,\"%*s\",type=%d)\n",dir->i_ino,inode->i_ino, len,name,type); if ((retval = affs_check_name(name,len))) return retval; if (len > 30) len = 30; dir_bh = affs_bread(dir->i_dev,dir->i_ino,AFFS_I2BSIZE(dir)); inode_bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode)); link_bh = NULL; retval = -EIO; if (!dir_bh || !inode_bh) goto addentry_done; if (link) { link_bh = affs_bread(link->i_dev,link->i_ino,AFFS_I2BSIZE(link)); if (!link_bh) goto addentry_done; } ((struct dir_front *)inode_bh->b_data)->primary_type = cpu_to_be32(T_SHORT); ((struct dir_front *)inode_bh->b_data)->own_key = cpu_to_be32(inode->i_ino); DIR_END(inode_bh->b_data,inode)->dir_name[0] = len; strncpy(DIR_END(inode_bh->b_data,inode)->dir_name + 1,name,len); DIR_END(inode_bh->b_data,inode)->secondary_type = cpu_to_be32(type); DIR_END(inode_bh->b_data,inode)->parent = cpu_to_be32(dir->i_ino); lock_super(inode->i_sb); retval = affs_insert_hash(dir->i_ino,inode_bh,dir); if (link_bh) { LINK_END(inode_bh->b_data,inode)->original = cpu_to_be32(link->i_ino); LINK_END(inode_bh->b_data,inode)->link_chain = FILE_END(link_bh->b_data,link)->link_chain; FILE_END(link_bh->b_data,link)->link_chain = cpu_to_be32(inode->i_ino); affs_fix_checksum(AFFS_I2BSIZE(link),link_bh->b_data,5); link->i_version = ++global_event; mark_inode_dirty(link); mark_buffer_dirty(link_bh,1); } affs_fix_checksum(AFFS_I2BSIZE(inode),inode_bh->b_data,5); affs_fix_checksum(AFFS_I2BSIZE(dir),dir_bh->b_data,5); dir->i_version = ++global_event; dir->i_mtime = dir->i_atime = dir->i_ctime = CURRENT_TIME; unlock_super(inode->i_sb); mark_inode_dirty(dir); mark_inode_dirty(inode); mark_buffer_dirty(dir_bh,1); mark_buffer_dirty(inode_bh,1); addentry_done: affs_brelse(dir_bh); affs_brelse(inode_bh); affs_brelse(link_bh); return retval; }
int affs_remove_header(struct dentry *dentry) { struct super_block *sb; struct inode *inode, *dir; struct buffer_head *bh = NULL; int retval; dir = dentry->d_parent->d_inode; sb = dir->i_sb; retval = -ENOENT; inode = dentry->d_inode; if (!inode) goto done; pr_debug("AFFS: remove_header(key=%ld)\n", inode->i_ino); retval = -EIO; bh = affs_bread(sb, (u32)(long)dentry->d_fsdata); if (!bh) goto done; affs_lock_link(inode); affs_lock_dir(dir); switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) { case ST_USERDIR: /* if we ever want to support links to dirs * i_hash_lock of the inode must only be * taken after some checks */ affs_lock_dir(inode); retval = affs_empty_dir(inode); affs_unlock_dir(inode); if (retval) goto done_unlock; break; default: break; } retval = affs_remove_hash(dir, bh); if (retval) goto done_unlock; mark_buffer_dirty_inode(bh, inode); affs_unlock_dir(dir); if (inode->i_nlink > 1) retval = affs_remove_link(dentry); else inode->i_nlink = 0; affs_unlock_link(inode); inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); done: affs_brelse(bh); return retval; done_unlock: affs_unlock_dir(dir); affs_unlock_link(inode); goto done; }
void affs_truncate(struct inode *inode) { struct buffer_head *bh = NULL; int first; /* First block to be thrown away */ int block; s32 key; s32 *keyp; s32 ekey; s32 ptype, stype; int freethis; int net_blocksize; int blocksize = AFFS_I2BSIZE(inode); int rem; int ext; pr_debug("AFFS: truncate(inode=%ld,size=%lu)\n",inode->i_ino,inode->i_size); net_blocksize = blocksize - ((inode->i_sb->u.affs_sb.s_flags & SF_OFS) ? 24 : 0); first = (inode->i_size + net_blocksize - 1) / net_blocksize; if (inode->u.affs_i.i_lastblock < first - 1) { /* There has to be at least one new block to be allocated */ if (!inode->u.affs_i.i_ec && alloc_ext_cache(inode)) { /* XXX Fine! No way to indicate an error. */ return /* -ENOSPC */; } bh = affs_getblock(inode,first - 1); if (!bh) { affs_warning(inode->i_sb,"truncate","Cannot extend file"); inode->i_size = net_blocksize * (inode->u.affs_i.i_lastblock + 1); } else if (inode->i_sb->u.affs_sb.s_flags & SF_OFS) { rem = inode->i_size % net_blocksize; DATA_FRONT(bh)->data_size = cpu_to_be32(rem ? rem : net_blocksize); affs_fix_checksum(blocksize,bh->b_data,5); mark_buffer_dirty(bh,0); } goto out_truncate; } ekey = inode->i_ino; ext = 0; /* Free all blocks starting at 'first' and all then-empty * extension blocks. Do not free the header block, though. */ while (ekey) { if (!(bh = affs_bread(inode->i_dev,ekey,blocksize))) { affs_error(inode->i_sb,"truncate","Cannot read block %d",ekey); goto out_truncate; } if (affs_checksum_block(blocksize,bh->b_data,&ptype,&stype)) { affs_error(inode->i_sb,"truncate","Checksum error in header/ext block %d", ekey); goto out_truncate; } if (stype != ST_FILE || (ptype != T_SHORT && ptype != T_LIST)) { affs_error(inode->i_sb,"truncate", "Bad block (key=%d, ptype=%d, stype=%d)",ekey,ptype,stype); goto out_truncate; } /* Do we have to free this extension block after * freeing the data blocks pointed to? */ freethis = first == 0 && ekey != inode->i_ino; /* Free the data blocks. 'first' is relative to this * extension block and may well lie behind this block. */ for (block = first; block < AFFS_I2HSIZE(inode); block++) { keyp = &AFFS_BLOCK(bh->b_data,inode,block); key = be32_to_cpu(*keyp); if (key) { *keyp = 0; affs_free_block(inode->i_sb,key); } else break; } keyp = &GET_END_PTR(struct file_end,bh->b_data,blocksize)->extension; key = be32_to_cpu(*keyp); /* If 'first' is in this block or is the first * in the next one, this will be the last in * the list, thus we have to adjust the count * and zero the pointer to the next ext block. */ if (first <= AFFS_I2HSIZE(inode)) { ((struct file_front *)bh->b_data)->block_count = cpu_to_be32(first); first = 0; *keyp = 0; affs_fix_checksum(blocksize,bh->b_data,5); mark_buffer_dirty(bh,1); } else first -= AFFS_I2HSIZE(inode); affs_brelse(bh); bh = NULL; if (freethis) /* Don't bother fixing checksum */ affs_free_block(inode->i_sb,ekey); ekey = key; } block = ((inode->i_size + net_blocksize - 1) / net_blocksize) - 1; inode->u.affs_i.i_lastblock = block; /* If the file is not truncated to a block boundary, * the partial block after the EOF must be zeroed * so it cannot become accessible again. */ rem = inode->i_size % net_blocksize; if (rem) { if ((inode->i_sb->u.affs_sb.s_flags & SF_OFS)) rem += 24; pr_debug("AFFS: Zeroing from offset %d in block %d\n",rem,block); bh = affs_getblock(inode,block); if (bh) { memset(bh->b_data + rem,0,blocksize - rem); if ((inode->i_sb->u.affs_sb.s_flags & SF_OFS)) { ((struct data_front *)bh->b_data)->data_size = cpu_to_be32(rem); ((struct data_front *)bh->b_data)->next_data = 0; affs_fix_checksum(blocksize,bh->b_data,5); } mark_buffer_dirty(bh,1); } else affs_error(inode->i_sb,"truncate","Cannot read block %d",block); } out_truncate: affs_brelse(bh); /* Invalidate cache */ if (inode->u.affs_i.i_ec) { inode->u.affs_i.i_ec->max_ext = 0; for (key = 0; key < 3; key++) { inode->u.affs_i.i_ec->kc[key].kc_next_key = 0; inode->u.affs_i.i_ec->kc[key].kc_last = -1; } } mark_inode_dirty(inode); }
static int affs_readdir(struct file *filp, void *dirent, filldir_t filldir) { struct inode *inode = filp->f_path.dentry->d_inode; struct super_block *sb = inode->i_sb; struct buffer_head *dir_bh; struct buffer_head *fh_bh; unsigned char *name; int namelen; u32 i; int hash_pos; int chain_pos; u32 f_pos; u32 ino; int stored; int res; pr_debug("AFFS: readdir(ino=%lu,f_pos=%lx)\n",inode->i_ino,(unsigned long)filp->f_pos); stored = 0; res = -EIO; dir_bh = NULL; fh_bh = NULL; f_pos = filp->f_pos; if (f_pos == 0) { filp->private_data = (void *)0; if (filldir(dirent, ".", 1, f_pos, inode->i_ino, DT_DIR) < 0) return 0; filp->f_pos = f_pos = 1; stored++; } if (f_pos == 1) { if (filldir(dirent, "..", 2, f_pos, parent_ino(filp->f_path.dentry), DT_DIR) < 0) return stored; filp->f_pos = f_pos = 2; stored++; } affs_lock_dir(inode); chain_pos = (f_pos - 2) & 0xffff; hash_pos = (f_pos - 2) >> 16; if (chain_pos == 0xffff) { affs_warning(sb, "readdir", "More than 65535 entries in chain"); chain_pos = 0; hash_pos++; filp->f_pos = ((hash_pos << 16) | chain_pos) + 2; } dir_bh = affs_bread(sb, inode->i_ino); if (!dir_bh) goto readdir_out; ino = (u32)(long)filp->private_data; if (ino && filp->f_version == inode->i_version) { pr_debug("AFFS: readdir() left off=%d\n", ino); goto inside; } ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); for (i = 0; ino && i < chain_pos; i++) { fh_bh = affs_bread(sb, ino); if (!fh_bh) { affs_error(sb, "readdir","Cannot read block %d", i); goto readdir_out; } ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); affs_brelse(fh_bh); fh_bh = NULL; } if (ino) goto inside; hash_pos++; for (; hash_pos < AFFS_SB(sb)->s_hashsize; hash_pos++) { ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); if (!ino) continue; f_pos = (hash_pos << 16) + 2; inside: do { fh_bh = affs_bread(sb, ino); if (!fh_bh) { affs_error(sb, "readdir","Cannot read block %d", ino); goto readdir_done; } namelen = min(AFFS_TAIL(sb, fh_bh)->name[0], (u8)30); name = AFFS_TAIL(sb, fh_bh)->name + 1; pr_debug("AFFS: readdir(): filldir(\"%.*s\", ino=%u), hash=%d, f_pos=%x\n", namelen, name, ino, hash_pos, f_pos); if (filldir(dirent, name, namelen, f_pos, ino, DT_UNKNOWN) < 0) goto readdir_done; stored++; f_pos++; ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); affs_brelse(fh_bh); fh_bh = NULL; } while (ino); } readdir_done: filp->f_pos = f_pos; filp->f_version = inode->i_version; filp->private_data = (void *)(long)ino; res = stored; readdir_out: affs_brelse(dir_bh); affs_brelse(fh_bh); affs_unlock_dir(inode); pr_debug("AFFS: readdir()=%d\n", stored); return res; }
static int affs_bmap(struct inode *inode, int block) { struct buffer_head *bh; s32 key, nkey; s32 ptype, stype; int ext; int index; int keycount; struct key_cache *kc; struct key_cache *tkc; struct timeval tv; s32 *keyp; int i; pr_debug("AFFS: bmap(%lu,%d)\n",inode->i_ino,block); if (block < 0) { affs_error(inode->i_sb,"bmap","Block < 0"); return 0; } if (!inode->u.affs_i.i_ec) { if (alloc_ext_cache(inode)) { return 0; } } /* Try to find the requested key in the cache. * In order to speed this up as much as possible, * the cache line lookup is done in a separate * step. */ for (i = 0; i < 4; i++) { tkc = &inode->u.affs_i.i_ec->kc[i]; /* Look in any cache if the key is there */ if (block <= tkc->kc_last && block >= tkc->kc_first) { return tkc->kc_keys[block - tkc->kc_first]; } } kc = NULL; #ifdef OSKIT tv.tv_sec = CURRENT_TIME; tv.tv_usec = 0; #else tv = xtime; #endif for (i = 0; i < 4; i++) { tkc = &inode->u.affs_i.i_ec->kc[i]; if (tkc->kc_lru_time.tv_sec > tv.tv_sec) continue; if (tkc->kc_lru_time.tv_sec < tv.tv_sec || tkc->kc_lru_time.tv_usec < tv.tv_usec) { kc = tkc; tv = tkc->kc_lru_time; } } if (!kc) /* Really shouldn't happen */ kc = tkc; #ifdef OSKIT kc->kc_lru_time.tv_sec = CURRENT_TIME; kc->kc_lru_time.tv_usec = 0; #else kc->kc_lru_time = xtime; #endif keyp = kc->kc_keys; kc->kc_first = block; kc->kc_last = -1; keycount = AFFS_KCSIZE; /* Calculate sequence number of the extension block where the * number of the requested block is stored. 0 means it's in * the file header. */ ext = block / AFFS_I2HSIZE(inode); key = calc_key(inode,&ext); block -= ext * AFFS_I2HSIZE(inode); for (;;) { bh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode)); if (!bh) return 0; index = seqnum_to_index(ext); if (index > inode->u.affs_i.i_ec->max_ext && (affs_checksum_block(AFFS_I2BSIZE(inode),bh->b_data,&ptype,&stype) || (ptype != T_SHORT && ptype != T_LIST) || stype != ST_FILE)) { affs_brelse(bh); return 0; } nkey = be32_to_cpu(FILE_END(bh->b_data,inode)->extension); if (block < AFFS_I2HSIZE(inode)) { /* Fill cache as much as possible */ if (keycount) { kc->kc_first = ext * AFFS_I2HSIZE(inode) + block; keycount = keycount < AFFS_I2HSIZE(inode) - block ? keycount : AFFS_I2HSIZE(inode) - block; for (i = 0; i < keycount; i++) kc->kc_keys[i] = be32_to_cpu(AFFS_BLOCK(bh->b_data,inode,block + i)); kc->kc_last = kc->kc_first + i - 1; } break; } block -= AFFS_I2HSIZE(inode); affs_brelse(bh); ext++; if (index > inode->u.affs_i.i_ec->max_ext && AFFS_ISINDEX(ext)) { inode->u.affs_i.i_ec->ec[index] = nkey; inode->u.affs_i.i_ec->max_ext = index; } key = nkey; } kc->kc_this_key = key; kc->kc_this_seq = ext; kc->kc_next_key = nkey; key = be32_to_cpu(AFFS_BLOCK(bh->b_data,inode,block)); affs_brelse(bh); return key; }
static struct buffer_head * affs_getblock(struct inode *inode, s32 block) { struct super_block *sb = inode->i_sb; int ofs = sb->u.affs_sb.s_flags & SF_OFS; int ext = block / AFFS_I2HSIZE(inode); struct buffer_head *bh, *ebh, *pbh = NULL; struct key_cache *kc; s32 key, nkey; int cf, j, pt; int index; int err; pr_debug("AFFS: getblock(%lu,%d)\n",inode->i_ino,block); if (block < 0) goto out_fail; key = calc_key(inode,&ext); block -= ext * AFFS_I2HSIZE(inode); pt = ext ? T_LIST : T_SHORT; /* Key refers now to the last known extension block, * ext is its sequence number (if 0, key refers to the * header block), and block is the block number relative * to the first block stored in that extension block. */ for (;;) { /* Loop over header block and extension blocks */ struct file_front *fdp; bh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode)); if (!bh) goto out_fail; fdp = (struct file_front *) bh->b_data; err = affs_checksum_block(AFFS_I2BSIZE(inode),bh->b_data,&cf,&j); if (err || cf != pt || j != ST_FILE) { affs_error(sb, "getblock", "Block %d is not a valid %s", key, pt == T_SHORT ? "file header" : "ext block"); goto out_free_bh; } j = be32_to_cpu(((struct file_front *)bh->b_data)->block_count); for (cf = 0; j < AFFS_I2HSIZE(inode) && j <= block; j++) { if (ofs && !pbh && inode->u.affs_i.i_lastblock >= 0) { if (j > 0) { s32 k = AFFS_BLOCK(bh->b_data, inode, j - 1); pbh = affs_bread(inode->i_dev, be32_to_cpu(k), AFFS_I2BSIZE(inode)); } else pbh = affs_getblock(inode,inode->u.affs_i.i_lastblock); if (!pbh) { affs_error(sb,"getblock", "Cannot get last block in file"); break; } } nkey = affs_new_data(inode); if (!nkey) break; inode->u.affs_i.i_lastblock++; if (AFFS_BLOCK(bh->b_data,inode,j)) { affs_warning(sb,"getblock","Block already allocated"); affs_free_block(sb,nkey); continue; } AFFS_BLOCK(bh->b_data,inode,j) = cpu_to_be32(nkey); if (ofs) { ebh = affs_bread(inode->i_dev,nkey,AFFS_I2BSIZE(inode)); if (!ebh) { affs_error(sb,"getblock", "Cannot get block %d",nkey); affs_free_block(sb,nkey); AFFS_BLOCK(bh->b_data,inode,j) = 0; break; } DATA_FRONT(ebh)->primary_type = cpu_to_be32(T_DATA); DATA_FRONT(ebh)->header_key = cpu_to_be32(inode->i_ino); DATA_FRONT(ebh)->sequence_number = cpu_to_be32(inode->u.affs_i.i_lastblock + 1); affs_fix_checksum(AFFS_I2BSIZE(inode), ebh->b_data, 5); mark_buffer_dirty(ebh, 0); if (pbh) { DATA_FRONT(pbh)->data_size = cpu_to_be32(AFFS_I2BSIZE(inode) - 24); DATA_FRONT(pbh)->next_data = cpu_to_be32(nkey); affs_fix_checksum(AFFS_I2BSIZE(inode),pbh->b_data,5); mark_buffer_dirty(pbh,0); affs_brelse(pbh); } pbh = ebh; } cf = 1; } /* N.B. May need to release pbh after here */ if (cf) { if (pt == T_SHORT) fdp->first_data = AFFS_BLOCK(bh->b_data,inode,0); fdp->block_count = cpu_to_be32(j); affs_fix_checksum(AFFS_I2BSIZE(inode),bh->b_data,5); mark_buffer_dirty(bh,1); } if (block < j) { if (pbh) affs_brelse(pbh); break; } if (j < AFFS_I2HSIZE(inode)) { /* N.B. What about pbh here? */ goto out_free_bh; } block -= AFFS_I2HSIZE(inode); key = be32_to_cpu(FILE_END(bh->b_data,inode)->extension); if (!key) { key = affs_new_header(inode); if (!key) goto out_free_bh; ebh = affs_bread(inode->i_dev,key,AFFS_I2BSIZE(inode)); if (!ebh) { /* N.B. must free bh here */ goto out_free_block; } ((struct file_front *)ebh->b_data)->primary_type = cpu_to_be32(T_LIST); ((struct file_front *)ebh->b_data)->own_key = cpu_to_be32(key); FILE_END(ebh->b_data,inode)->secondary_type = cpu_to_be32(ST_FILE); FILE_END(ebh->b_data,inode)->parent = cpu_to_be32(inode->i_ino); affs_fix_checksum(AFFS_I2BSIZE(inode),ebh->b_data,5); mark_buffer_dirty(ebh, 1); FILE_END(bh->b_data,inode)->extension = cpu_to_be32(key); affs_fix_checksum(AFFS_I2BSIZE(inode),bh->b_data,5); mark_buffer_dirty(bh,1); affs_brelse(bh); bh = ebh; } pt = T_LIST; ext++; index = seqnum_to_index(ext); if (index > inode->u.affs_i.i_ec->max_ext && AFFS_ISINDEX(ext)) { inode->u.affs_i.i_ec->ec[index] = key; inode->u.affs_i.i_ec->max_ext = index; } affs_brelse(bh); } /* Invalidate key cache */ for (j = 0; j < 4; j++) { kc = &inode->u.affs_i.i_ec->kc[j]; kc->kc_last = -1; } key = be32_to_cpu(AFFS_BLOCK(bh->b_data,inode,block)); affs_brelse(bh); if (!key) goto out_fail; bh = affs_bread(inode->i_dev, key, AFFS_I2BSIZE(inode)); return bh; out_free_block: affs_free_block(sb, key); out_free_bh: affs_brelse(bh); out_fail: return NULL; }
static struct super_block * affs_read_super(struct super_block *s, void *data, int silent) { struct buffer_head *bh = NULL; struct buffer_head *bb; struct inode *root_inode; kdev_t dev = s->s_dev; s32 root_block; int blocks, size, blocksize; u32 chksum; u32 *bm; s32 ptype, stype; int mapidx; int num_bm; int i, j; s32 key; uid_t uid; gid_t gid; int reserved; int az_no; int bmalt = 0; unsigned long mount_flags; unsigned long offset; pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options"); MOD_INC_USE_COUNT; lock_super(s); s->s_magic = AFFS_SUPER_MAGIC; s->s_op = &affs_sops; s->u.affs_sb.s_bitmap = NULL; s->u.affs_sb.s_root_bh = NULL; s->u.affs_sb.s_prefix = NULL; s->u.affs_sb.s_hashsize= 0; if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, &blocksize,&s->u.affs_sb.s_prefix, s->u.affs_sb.s_volume, &mount_flags)) goto out_bad_opts; /* N.B. after this point s_prefix must be released */ s->u.affs_sb.s_flags = mount_flags; s->u.affs_sb.s_mode = i; s->u.affs_sb.s_uid = uid; s->u.affs_sb.s_gid = gid; s->u.affs_sb.s_reserved= reserved; /* Get the size of the device in 512-byte blocks. * If we later see that the partition uses bigger * blocks, we will have to change it. */ blocks = blk_size[MAJOR(dev)][MINOR(dev)]; if (blocks == 0) goto out_bad_size; s->u.affs_sb.s_blksize = blksize_size[MAJOR(dev)][MINOR(dev)]; if (!s->u.affs_sb.s_blksize) s->u.affs_sb.s_blksize = BLOCK_SIZE; size = (s->u.affs_sb.s_blksize / 512) * blocks; pr_debug("AFFS: initial blksize=%d, blocks=%d\n", s->u.affs_sb.s_blksize, blocks); /* Try to find root block. Its location depends on the block size. */ i = 512; j = 4096; if (blocksize > 0) { i = j = blocksize; size = size / (blocksize / 512); } for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) { s->u.affs_sb.s_root_block = root_block; if (root_block < 0) s->u.affs_sb.s_root_block = (reserved + size - 1) / 2; pr_debug("AFFS: setting blocksize to %d\n", blocksize); set_blocksize(dev, blocksize); /* The root block location that was calculated above is not * correct if the partition size is an odd number of 512- * byte blocks, which will be rounded down to a number of * 1024-byte blocks, and if there were an even number of * reserved blocks. Ideally, all partition checkers should * report the real number of blocks of the real blocksize, * but since this just cannot be done, we have to try to * find the root block anyways. In the above case, it is one * block behind the calculated one. So we check this one, too. */ for (num_bm = 0; num_bm < 2; num_bm++) { pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, " "size=%d, reserved=%d\n", kdevname(dev), s->u.affs_sb.s_root_block + num_bm, blocksize, size, reserved); bh = affs_bread(dev, s->u.affs_sb.s_root_block + num_bm, blocksize); if (!bh) continue; if (!affs_checksum_block(blocksize,bh->b_data,&ptype,&stype) && ptype == T_SHORT && stype == ST_ROOT) { s->s_blocksize = blocksize; s->u.affs_sb.s_hashsize = blocksize / 4 - 56; s->u.affs_sb.s_root_block += num_bm; key = 1; goto got_root; } affs_brelse(bh); bh = NULL; } } goto out_no_valid_block; /* N.B. after this point bh must be released */ got_root: root_block = s->u.affs_sb.s_root_block; s->u.affs_sb.s_partition_size = size; s->s_blocksize_bits = blocksize == 512 ? 9 : blocksize == 1024 ? 10 : blocksize == 2048 ? 11 : 12; /* Find out which kind of FS we have */ bb = affs_bread(dev,0,s->s_blocksize); if (!bb) goto out_no_root_block; chksum = be32_to_cpu(*(u32 *)bb->b_data); affs_brelse(bb); /* Dircache filesystems are compatible with non-dircache ones * when reading. As long as they aren't supported, writing is * not recommended. */ if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS || chksum == MUFS_DCOFS) && !(s->s_flags & MS_RDONLY)) { printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n", kdevname(dev)); s->s_flags |= MS_RDONLY; s->u.affs_sb.s_flags |= SF_READONLY; } switch (chksum) { case MUFS_FS: case MUFS_INTLFFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_INTLFFS: s->u.affs_sb.s_flags |= SF_INTL; break; case MUFS_DCFFS: case MUFS_FFS: s->u.affs_sb.s_flags |= SF_MUFS; break; case FS_DCFFS: case FS_FFS: break; case MUFS_OFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_OFS: s->u.affs_sb.s_flags |= SF_OFS; s->s_flags |= MS_NOEXEC; break; case MUFS_DCOFS: case MUFS_INTLOFS: s->u.affs_sb.s_flags |= SF_MUFS; case FS_DCOFS: case FS_INTLOFS: s->u.affs_sb.s_flags |= SF_INTL | SF_OFS; s->s_flags |= MS_NOEXEC; break; default: goto out_unknown_fs; } if (mount_flags & SF_VERBOSE) { chksum = cpu_to_be32(chksum); printk(KERN_NOTICE "AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n", GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[0], &GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[1], (char *)&chksum,((char *)&chksum)[3] + '0',blocksize); }
default: goto out_unknown_fs; } if (mount_flags & SF_VERBOSE) { chksum = cpu_to_be32(chksum); printk(KERN_NOTICE "AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n", GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[0], &GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[1], (char *)&chksum,((char *)&chksum)[3] + '0',blocksize); } s->s_flags |= MS_NODEV | MS_NOSUID; /* Keep super block in cache */ bb = affs_bread(dev,root_block,s->s_blocksize); if (!bb) goto out_no_root_block; s->u.affs_sb.s_root_bh = bb; /* N.B. after this point s_root_bh must be released */ /* Allocate space for bitmaps, zones and others */ size = s->u.affs_sb.s_partition_size - reserved; num_bm = (size + s->s_blocksize * 8 - 32 - 1) / (s->s_blocksize * 8 - 32); az_no = (size + AFFS_ZONE_SIZE - 1) / (AFFS_ZONE_SIZE - 32); ptype = num_bm * sizeof(struct affs_bm_info) + az_no * sizeof(struct affs_alloc_zone) + MAX_ZONES * sizeof(struct affs_zone); pr_debug("AFFS: num_bm=%d, az_no=%d, sum=%d\n",num_bm,az_no,ptype); if (!(s->u.affs_sb.s_bitmap = kmalloc(ptype, GFP_KERNEL)))
void affs_read_inode(struct inode *inode) { struct buffer_head *bh; struct file_front *file_front; struct file_end *file_end; s32 block; unsigned long prot; s32 ptype, stype; unsigned short id; pr_debug("AFFS: read_inode(%lu)\n",inode->i_ino); block = inode->i_ino; if (!(bh = affs_bread(inode->i_dev,block,AFFS_I2BSIZE(inode)))) { affs_error(inode->i_sb,"read_inode","Cannot read block %d",block); return; } if (affs_checksum_block(AFFS_I2BSIZE(inode),bh->b_data,&ptype,&stype) || ptype != T_SHORT) { affs_error(inode->i_sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d",ptype,block); affs_brelse(bh); return; } file_front = (struct file_front *)bh->b_data; file_end = GET_END_PTR(struct file_end, bh->b_data,AFFS_I2BSIZE(inode)); prot = (be32_to_cpu(file_end->protect) & ~0x10) ^ FIBF_OWNER; inode->u.affs_i.i_protect = prot; inode->u.affs_i.i_parent = be32_to_cpu(file_end->parent); inode->u.affs_i.i_original = 0; inode->u.affs_i.i_zone = 0; inode->u.affs_i.i_hlink = 0; inode->u.affs_i.i_pa_cnt = 0; inode->u.affs_i.i_pa_next = 0; inode->u.affs_i.i_pa_last = 0; inode->u.affs_i.i_ec = NULL; inode->u.affs_i.i_lastblock = -1; inode->i_nlink = 1; inode->i_mode = 0; if (inode->i_sb->u.affs_sb.s_flags & SF_SETMODE) inode->i_mode = inode->i_sb->u.affs_sb.s_mode; else inode->i_mode = prot_to_mode(prot); if (inode->i_sb->u.affs_sb.s_flags & SF_SETUID) inode->i_uid = inode->i_sb->u.affs_sb.s_uid; id = be16_to_cpu(file_end->owner_uid); if (id == 0 || inode->i_sb->u.affs_sb.s_flags & SF_SETUID) inode->i_uid = inode->i_sb->u.affs_sb.s_uid; else if (id == 0xFFFF && inode->i_sb->u.affs_sb.s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(file_end->owner_gid); if (id == 0 || inode->i_sb->u.affs_sb.s_flags & SF_SETGID) inode->i_gid = inode->i_sb->u.affs_sb.s_gid; else if (id == 0xFFFF && inode->i_sb->u.affs_sb.s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(file_end->secondary_type)) { case ST_ROOT: inode->i_uid = inode->i_sb->u.affs_sb.s_uid; inode->i_gid = inode->i_sb->u.affs_sb.s_gid; case ST_USERDIR: if (be32_to_cpu(file_end->secondary_type) == ST_USERDIR || inode->i_sb->u.affs_sb.s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; inode->i_size = 0; break; case ST_LINKDIR: affs_error(inode->i_sb,"read_inode","inode is LINKDIR"); affs_brelse(bh); return; case ST_LINKFILE: affs_error(inode->i_sb,"read_inode","inode is LINKFILE"); affs_brelse(bh); return; case ST_FILE: inode->i_mode |= S_IFREG; inode->i_size = be32_to_cpu(file_end->byte_size); if (inode->i_sb->u.affs_sb.s_flags & SF_OFS) block = AFFS_I2BSIZE(inode) - 24; else block = AFFS_I2BSIZE(inode); inode->u.affs_i.i_lastblock = ((inode->i_size + block - 1) / block) - 1; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_size = 0; break; } inode->i_mtime = inode->i_atime = inode->i_ctime = (be32_to_cpu(file_end->created.ds_Days) * (24 * 60 * 60) + be32_to_cpu(file_end->created.ds_Minute) * 60 + be32_to_cpu(file_end->created.ds_Tick) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; affs_brelse(bh); inode->i_op = NULL; if (S_ISREG(inode->i_mode)) { if (inode->i_sb->u.affs_sb.s_flags & SF_OFS) { inode->i_op = &affs_file_inode_operations_ofs; } else { inode->i_op = &affs_file_inode_operations; } } else if (S_ISDIR(inode->i_mode)) { /* Maybe it should be controlled by mount parameter? */ inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; } else if (S_ISLNK(inode->i_mode)) inode->i_op = &affs_symlink_inode_operations; }
int affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type) { struct super_block *sb = dir->i_sb; struct buffer_head *inode_bh = NULL; struct buffer_head *bh = NULL; u32 block = 0; int retval; pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino, (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type); retval = -EIO; bh = affs_bread(sb, inode->i_ino); if (!bh) goto done; affs_lock_link(inode); switch (type) { case ST_LINKFILE: case ST_LINKDIR: retval = -ENOSPC; block = affs_alloc_block(dir, dir->i_ino); if (!block) goto err; retval = -EIO; inode_bh = bh; bh = affs_getzeroblk(sb, block); if (!bh) goto err; break; default: break; } AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT); AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr); affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry); AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type); AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino); if (inode_bh) { __be32 chain; chain = AFFS_TAIL(sb, inode_bh)->link_chain; AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino); AFFS_TAIL(sb, bh)->link_chain = chain; AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block); affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain)); mark_buffer_dirty_inode(inode_bh, inode); inode->i_nlink = 2; atomic_inc(&inode->i_count); } affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); dentry->d_fsdata = (void *)(long)bh->b_blocknr; affs_lock_dir(dir); retval = affs_insert_hash(dir, bh); mark_buffer_dirty_inode(bh, inode); affs_unlock_dir(dir); affs_unlock_link(inode); d_instantiate(dentry, inode); done: affs_brelse(inode_bh); affs_brelse(bh); return retval; err: if (block) affs_free_block(sb, block); affs_unlock_link(inode); goto done; }
struct super_block * affs_read_super(struct super_block *s,void *data, int silent) { struct buffer_head *bh = NULL; struct buffer_head *bb; kdev_t dev = s->s_dev; int root_block; int size; __u32 chksum; __u32 *bm; int ptype, stype; int mapidx; int num_bm; int i, j; int key; int blocksize; uid_t uid; gid_t gid; int reserved; int az_no; unsigned long mount_flags; unsigned long offset; pr_debug("affs_read_super(%s)\n",data ? (const char *)data : "no options"); MOD_INC_USE_COUNT; if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, &blocksize,&s->u.affs_sb.s_prefix,s->u.affs_sb.s_volume,&mount_flags)) { s->s_dev = 0; printk("AFFS: error parsing options.\n"); MOD_DEC_USE_COUNT; return NULL; } lock_super(s); /* Get the size of the device in 512-byte blocks. * If we later see that the partition uses bigger * blocks, we will have to change it. */ size = blksize_size[MAJOR(dev)][MINOR(dev)]; size = (size ? size : BLOCK_SIZE) / 512 * blk_size[MAJOR(dev)][MINOR(dev)]; s->u.affs_sb.s_bitmap = NULL; s->u.affs_sb.s_root_bh = NULL; s->u.affs_sb.s_flags = mount_flags; s->u.affs_sb.s_mode = i; s->u.affs_sb.s_uid = uid; s->u.affs_sb.s_gid = gid; if (size == 0) { s->s_dev = 0; unlock_super(s); printk("affs_read_super: could not determine device size\n"); goto out; } s->u.affs_sb.s_partition_size = size; s->u.affs_sb.s_reserved = reserved; /* Try to find root block. Its location may depend on the block size. */ s->u.affs_sb.s_hashsize = 0; if (blocksize > 0) { i = blocksize; j = blocksize; } else { i = 512; j = 4096; } for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) { if (root_block < 0) s->u.affs_sb.s_root_block = (reserved + size - 1) / 2; else s->u.affs_sb.s_root_block = root_block; set_blocksize(dev,blocksize); /* The root block location that was calculated above is not * correct if the partition size is an odd number of 512- * byte blocks, which will be rounded down to a number of * 1024-byte blocks, and if there were an even number of * reserved blocks. Ideally, all partition checkers should * report the real number of blocks of the real blocksize, * but since this just cannot be done, we have to try to * find the root block anyways. In the above case, it is one * block behind the calculated one. So we check this one, too. */ for (num_bm = 0; num_bm < 2; num_bm++) { pr_debug("AFFS: Dev %s - trying bs=%d bytes, root at %d, " "size=%d blocks, %d reserved\n",kdevname(dev),blocksize, s->u.affs_sb.s_root_block + num_bm,size,reserved); bh = affs_bread(dev,s->u.affs_sb.s_root_block + num_bm,blocksize); if (!bh) { printk("AFFS: unable to read root block\n"); goto out; } if (!affs_checksum_block(blocksize,bh->b_data,&ptype,&stype) && ptype == T_SHORT && stype == ST_ROOT) { s->s_blocksize = blocksize; s->u.affs_sb.s_hashsize = blocksize / 4 - 56; s->u.affs_sb.s_root_block += num_bm; key = 1; break; } } if (key) break; affs_brelse(bh); bh = NULL; } if (!key) { affs_brelse(bh); if (!silent) printk("AFFS: Can't find a valid root block on device %s\n",kdevname(dev)); goto out; } root_block = s->u.affs_sb.s_root_block; s->u.affs_sb.s_partition_size = size; s->s_blocksize_bits = blocksize == 512 ? 9 : blocksize == 1024 ? 10 : blocksize == 2048 ? 11 : 12; /* Find out which kind of FS we have */ bb = affs_bread(dev,0,s->s_blocksize); if (bb) { chksum = htonl(*(__u32 *)bb->b_data); switch (chksum) { case MUFS_FS: case MUFS_INTLFFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_INTLFFS: s->u.affs_sb.s_flags |= SF_INTL; break; case MUFS_DCFFS: case MUFS_FFS: s->u.affs_sb.s_flags |= SF_MUFS; break; case FS_DCFFS: case FS_FFS: break; case MUFS_OFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_OFS: s->u.affs_sb.s_flags |= SF_OFS; break; case MUFS_DCOFS: if (!(s->s_flags & MS_RDONLY)) { printk("AFFS: Dircache FS - mounting %s read only.\n", kdevname(dev)); } /* fall thru */ case MUFS_INTLOFS: s->u.affs_sb.s_flags |= SF_MUFS; if (0) /* fall thru */ case FS_DCOFS: if (!(s->s_flags & MS_RDONLY)) { printk("AFFS: Dircache FS - mounting %s read only.\n", kdevname(dev)); } /* fall thru */ case FS_INTLOFS: s->u.affs_sb.s_flags |= SF_INTL | SF_OFS; break; default: printk("AFFS: Unknown filesystem on device %s: %08X\n", kdevname(dev),chksum); affs_brelse(bb); goto out; } affs_brelse(bb); } else { printk("AFFS: Can't get boot block.\n"); goto out; } if (mount_flags & SF_VERBOSE) { chksum = ntohl(chksum); printk("AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n", GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[0], &GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[1], (char *)&chksum,((char *)&chksum)[3] + '0',blocksize); }
static int affs_fill_super(struct super_block *sb, void *data, int silent) { struct affs_sb_info *sbi; struct buffer_head *root_bh = NULL; struct buffer_head *boot_bh; struct inode *root_inode = NULL; s32 root_block; int size, blocksize; u32 chksum; int num_bm; int i, j; s32 key; kuid_t uid; kgid_t gid; int reserved; unsigned long mount_flags; int tmp_flags; /* fix remount prototype... */ u8 sig[4]; int ret; save_mount_options(sb, data); pr_debug("AFFS: read_super(%s)\n",data ? (const char *)data : "no options"); sb->s_magic = AFFS_SUPER_MAGIC; sb->s_op = &affs_sops; sb->s_flags |= MS_NODIRATIME; sbi = kzalloc(sizeof(struct affs_sb_info), GFP_KERNEL); if (!sbi) return -ENOMEM; sb->s_fs_info = sbi; sbi->sb = sb; mutex_init(&sbi->s_bmlock); spin_lock_init(&sbi->symlink_lock); spin_lock_init(&sbi->work_lock); INIT_DELAYED_WORK(&sbi->sb_work, flush_superblock); if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, &blocksize,&sbi->s_prefix, sbi->s_volume, &mount_flags)) { printk(KERN_ERR "AFFS: Error parsing options\n"); kfree(sbi->s_prefix); kfree(sbi); return -EINVAL; } /* N.B. after this point s_prefix must be released */ sbi->s_flags = mount_flags; sbi->s_mode = i; sbi->s_uid = uid; sbi->s_gid = gid; sbi->s_reserved= reserved; /* Get the size of the device in 512-byte blocks. * If we later see that the partition uses bigger * blocks, we will have to change it. */ size = sb->s_bdev->bd_inode->i_size >> 9; pr_debug("AFFS: initial blocksize=%d, #blocks=%d\n", 512, size); affs_set_blocksize(sb, PAGE_SIZE); /* Try to find root block. Its location depends on the block size. */ i = 512; j = 4096; if (blocksize > 0) { i = j = blocksize; size = size / (blocksize / 512); } for (blocksize = i, key = 0; blocksize <= j; blocksize <<= 1, size >>= 1) { sbi->s_root_block = root_block; if (root_block < 0) sbi->s_root_block = (reserved + size - 1) / 2; pr_debug("AFFS: setting blocksize to %d\n", blocksize); affs_set_blocksize(sb, blocksize); sbi->s_partition_size = size; /* The root block location that was calculated above is not * correct if the partition size is an odd number of 512- * byte blocks, which will be rounded down to a number of * 1024-byte blocks, and if there were an even number of * reserved blocks. Ideally, all partition checkers should * report the real number of blocks of the real blocksize, * but since this just cannot be done, we have to try to * find the root block anyways. In the above case, it is one * block behind the calculated one. So we check this one, too. */ for (num_bm = 0; num_bm < 2; num_bm++) { pr_debug("AFFS: Dev %s, trying root=%u, bs=%d, " "size=%d, reserved=%d\n", sb->s_id, sbi->s_root_block + num_bm, blocksize, size, reserved); root_bh = affs_bread(sb, sbi->s_root_block + num_bm); if (!root_bh) continue; if (!affs_checksum_block(sb, root_bh) && be32_to_cpu(AFFS_ROOT_HEAD(root_bh)->ptype) == T_SHORT && be32_to_cpu(AFFS_ROOT_TAIL(sb, root_bh)->stype) == ST_ROOT) { sbi->s_hashsize = blocksize / 4 - 56; sbi->s_root_block += num_bm; key = 1; goto got_root; } affs_brelse(root_bh); root_bh = NULL; } } if (!silent) printk(KERN_ERR "AFFS: No valid root block on device %s\n", sb->s_id); return -EINVAL; /* N.B. after this point bh must be released */ got_root: /* Keep super block in cache */ sbi->s_root_bh = root_bh; root_block = sbi->s_root_block; /* Find out which kind of FS we have */ boot_bh = sb_bread(sb, 0); if (!boot_bh) { printk(KERN_ERR "AFFS: Cannot read boot block\n"); return -EINVAL; } memcpy(sig, boot_bh->b_data, 4); brelse(boot_bh); chksum = be32_to_cpu(*(__be32 *)sig); /* Dircache filesystems are compatible with non-dircache ones * when reading. As long as they aren't supported, writing is * not recommended. */ if ((chksum == FS_DCFFS || chksum == MUFS_DCFFS || chksum == FS_DCOFS || chksum == MUFS_DCOFS) && !(sb->s_flags & MS_RDONLY)) { printk(KERN_NOTICE "AFFS: Dircache FS - mounting %s read only\n", sb->s_id); sb->s_flags |= MS_RDONLY; } switch (chksum) { case MUFS_FS: case MUFS_INTLFFS: case MUFS_DCFFS: sbi->s_flags |= SF_MUFS; /* fall thru */ case FS_INTLFFS: case FS_DCFFS: sbi->s_flags |= SF_INTL; break; case MUFS_FFS: sbi->s_flags |= SF_MUFS; break; case FS_FFS: break; case MUFS_OFS: sbi->s_flags |= SF_MUFS; /* fall thru */ case FS_OFS: sbi->s_flags |= SF_OFS; sb->s_flags |= MS_NOEXEC; break; case MUFS_DCOFS: case MUFS_INTLOFS: sbi->s_flags |= SF_MUFS; case FS_DCOFS: case FS_INTLOFS: sbi->s_flags |= SF_INTL | SF_OFS; sb->s_flags |= MS_NOEXEC; break; default: printk(KERN_ERR "AFFS: Unknown filesystem on device %s: %08X\n", sb->s_id, chksum); return -EINVAL; } if (mount_flags & SF_VERBOSE) { u8 len = AFFS_ROOT_TAIL(sb, root_bh)->disk_name[0]; printk(KERN_NOTICE "AFFS: Mounting volume \"%.*s\": Type=%.3s\\%c, Blocksize=%d\n", len > 31 ? 31 : len, AFFS_ROOT_TAIL(sb, root_bh)->disk_name + 1, sig, sig[3] + '0', blocksize); } sb->s_flags |= MS_NODEV | MS_NOSUID; sbi->s_data_blksize = sb->s_blocksize; if (sbi->s_flags & SF_OFS) sbi->s_data_blksize -= 24; tmp_flags = sb->s_flags; ret = affs_init_bitmap(sb, &tmp_flags); if (ret) return ret; sb->s_flags = tmp_flags; /* set up enough so that it can read an inode */ root_inode = affs_iget(sb, root_block); if (IS_ERR(root_inode)) return PTR_ERR(root_inode); if (AFFS_SB(sb)->s_flags & SF_INTL) sb->s_d_op = &affs_intl_dentry_operations; else sb->s_d_op = &affs_dentry_operations; sb->s_root = d_make_root(root_inode); if (!sb->s_root) { printk(KERN_ERR "AFFS: Get root inode failed\n"); return -ENOMEM; } pr_debug("AFFS: s_flags=%lX\n",sb->s_flags); return 0; }
static int affs_remove_link(struct dentry *dentry) { struct inode *dir, *inode = dentry->d_inode; struct super_block *sb = inode->i_sb; struct buffer_head *bh = NULL, *link_bh = NULL; u32 link_ino, ino; int retval; pr_debug("AFFS: remove_link(key=%ld)\n", inode->i_ino); retval = -EIO; bh = affs_bread(sb, inode->i_ino); if (!bh) goto done; link_ino = (u32)(long)dentry->d_fsdata; if (inode->i_ino == link_ino) { /* we can't remove the head of the link, as its blocknr is still used as ino, * so we remove the block of the first link instead. */ link_ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain); link_bh = affs_bread(sb, link_ino); if (!link_bh) goto done; dir = affs_iget(sb, be32_to_cpu(AFFS_TAIL(sb, link_bh)->parent)); if (IS_ERR(dir)) { retval = PTR_ERR(dir); goto done; } affs_lock_dir(dir); affs_fix_dcache(dentry, link_ino); retval = affs_remove_hash(dir, link_bh); if (retval) { affs_unlock_dir(dir); goto done; } mark_buffer_dirty_inode(link_bh, inode); memcpy(AFFS_TAIL(sb, bh)->name, AFFS_TAIL(sb, link_bh)->name, 32); retval = affs_insert_hash(dir, bh); if (retval) { affs_unlock_dir(dir); goto done; } mark_buffer_dirty_inode(bh, inode); affs_unlock_dir(dir); iput(dir); } else { link_bh = affs_bread(sb, link_ino); if (!link_bh) goto done; } while ((ino = be32_to_cpu(AFFS_TAIL(sb, bh)->link_chain)) != 0) { if (ino == link_ino) { __be32 ino2 = AFFS_TAIL(sb, link_bh)->link_chain; AFFS_TAIL(sb, bh)->link_chain = ino2; affs_adjust_checksum(bh, be32_to_cpu(ino2) - link_ino); mark_buffer_dirty_inode(bh, inode); retval = 0; /* Fix the link count, if bh is a normal header block without links */ switch (be32_to_cpu(AFFS_TAIL(sb, bh)->stype)) { case ST_LINKDIR: case ST_LINKFILE: break; default: if (!AFFS_TAIL(sb, bh)->link_chain) inode->i_nlink = 1; } affs_free_block(sb, link_ino); goto done; } affs_brelse(bh); bh = affs_bread(sb, ino); if (!bh) goto done; } retval = -ENOENT; done: affs_brelse(link_bh); affs_brelse(bh); return retval; }
int affs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { struct super_block *sb = dir->i_sb; struct buffer_head *bh; struct inode *inode; char *p; int i, maxlen, error; char c, lc; pr_debug("%s(%lu,\"%pd\" -> \"%s\")\n", __func__, dir->i_ino, dentry, symname); maxlen = AFFS_SB(sb)->s_hashsize * sizeof(u32) - 1; inode = affs_new_inode(dir); if (!inode) return -ENOSPC; inode->i_op = &affs_symlink_inode_operations; inode->i_data.a_ops = &affs_symlink_aops; inode->i_mode = S_IFLNK | 0777; mode_to_prot(inode); error = -EIO; bh = affs_bread(sb, inode->i_ino); if (!bh) goto err; i = 0; p = (char *)AFFS_HEAD(bh)->table; lc = '/'; if (*symname == '/') { struct affs_sb_info *sbi = AFFS_SB(sb); while (*symname == '/') symname++; spin_lock(&sbi->symlink_lock); while (sbi->s_volume[i]) /* Cannot overflow */ *p++ = sbi->s_volume[i++]; spin_unlock(&sbi->symlink_lock); } while (i < maxlen && (c = *symname++)) { if (c == '.' && lc == '/' && *symname == '.' && symname[1] == '/') { *p++ = '/'; i++; symname += 2; lc = '/'; } else if (c == '.' && lc == '/' && *symname == '/') { symname++; lc = '/'; } else { *p++ = c; lc = c; i++; } if (lc == '/') while (*symname == '/') symname++; } *p = 0; mark_buffer_dirty_inode(bh, inode); affs_brelse(bh); mark_inode_dirty(inode); error = affs_add_entry(dir, inode, dentry, ST_SOFTLINK); if (error) goto err; return 0; err: clear_nlink(inode); mark_inode_dirty(inode); iput(inode); return error; }
struct super_block * affs_read_super(struct super_block *s,void *data, int silent) { struct buffer_head *bh = NULL; struct buffer_head *bb; kdev_t dev = s->s_dev; int root_block; int size; __u32 chksum; __u32 *bm; int ptype, stype; int mapidx; int num_bm; int i, j; int key; int blocksize; uid_t uid; gid_t gid; int reserved; int az_no; unsigned long mount_flags; unsigned long offset; pr_debug("affs_read_super(%s)\n",data ? (const char *)data : "no options"); MOD_INC_USE_COUNT; if (!parse_options(data,&uid,&gid,&i,&reserved,&root_block, &blocksize,&s->u.affs_sb.s_prefix,s->u.affs_sb.s_volume,&mount_flags)) { s->s_dev = 0; printk("AFFS: error parsing options.\n"); MOD_DEC_USE_COUNT; return NULL; } lock_super(s); /* Get the size of the device in 512-byte blocks. * If we later see that the partition uses bigger * blocks, we will have to change it. */ size = blksize_size[MAJOR(dev)][MINOR(dev)]; size = (size ? size : BLOCK_SIZE) / 512 * blk_size[MAJOR(dev)][MINOR(dev)]; s->u.affs_sb.s_bitmap = NULL; s->u.affs_sb.s_root_bh = NULL; s->u.affs_sb.s_flags = mount_flags; s->u.affs_sb.s_mode = i; s->u.affs_sb.s_uid = uid; s->u.affs_sb.s_gid = gid; if (size == 0) { s->s_dev = 0; unlock_super(s); printk("affs_read_super: could not determine device size\n"); goto out; } s->u.affs_sb.s_partition_size = size; s->u.affs_sb.s_reserved = reserved; /* Try to find root block. Its location may depend on the block size. */ s->u.affs_sb.s_hashsize = 0; if (blocksize > 0) { chksum = blocksize; num_bm = blocksize; } else { chksum = 512; num_bm = 4096; } for (blocksize = chksum; blocksize <= num_bm; blocksize <<= 1, size >>= 1) { if (root_block < 0) s->u.affs_sb.s_root_block = (reserved + size - 1) / 2; else s->u.affs_sb.s_root_block = root_block; pr_debug("Trying bs=%d bytes, root at %d, size=%d blocks (%d reserved)\n", blocksize,s->u.affs_sb.s_root_block,size,reserved); set_blocksize(dev,blocksize); bh = affs_bread(dev,s->u.affs_sb.s_root_block,blocksize); if (!bh) { printk("AFFS: unable to read root block\n"); goto out; } if (!affs_checksum_block(blocksize,bh->b_data,&ptype,&stype) && ptype == T_SHORT && stype == ST_ROOT) { s->s_blocksize = blocksize; s->u.affs_sb.s_hashsize = blocksize / 4 - 56; break; } affs_brelse(bh); bh = NULL; } if (!s->u.affs_sb.s_hashsize) { affs_brelse(bh); if (!silent) printk("AFFS: Can't find a valid root block on device %s\n",kdevname(dev)); goto out; } root_block = s->u.affs_sb.s_root_block; s->u.affs_sb.s_partition_size = size; s->s_blocksize_bits = blocksize == 512 ? 9 : blocksize == 1024 ? 10 : blocksize == 2048 ? 11 : 12; /* Find out which kind of FS we have */ bb = affs_bread(dev,0,s->s_blocksize); if (bb) { chksum = htonl(*(__u32 *)bb->b_data); switch (chksum) { case MUFS_FS: case MUFS_INTLFFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_INTLFFS: s->u.affs_sb.s_flags |= SF_INTL; break; case MUFS_FFS: s->u.affs_sb.s_flags |= SF_MUFS; break; case FS_FFS: break; case MUFS_OFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_OFS: s->u.affs_sb.s_flags |= SF_OFS; break; case MUFS_INTLOFS: s->u.affs_sb.s_flags |= SF_MUFS; /* fall thru */ case FS_INTLOFS: s->u.affs_sb.s_flags |= SF_INTL | SF_OFS; break; case FS_DCOFS: case FS_DCFFS: case MUFS_DCOFS: case MUFS_DCFFS: if (!silent) printk("AFFS: Unsupported filesystem on device %s: %08X\n", kdevname(dev),chksum); if (0) default: printk("AFFS: Unknown filesystem on device %s: %08X\n", kdevname(dev),chksum); affs_brelse(bb); goto out; } affs_brelse(bb); } else { printk("AFFS: Can't get boot block.\n"); goto out; } if (mount_flags & SF_VERBOSE) { chksum = ntohl(chksum); printk("AFFS: Mounting volume \"%*s\": Type=%.3s\\%c, Blocksize=%d\n", GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[0], &GET_END_PTR(struct root_end,bh->b_data,blocksize)->disk_name[1], (char *)&chksum,((char *)&chksum)[3] + '0',blocksize); }