static struct dentry * befs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { struct inode *inode = NULL; struct super_block *sb = dir->i_sb; befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; befs_off_t offset; int ret; int utfnamelen; char *utfname; const char *name = dentry->d_name.name; befs_debug(sb, "---> befs_lookup() " "name %s inode %ld", dentry->d_name.name, dir->i_ino); /* Convert to UTF-8 */ if (BEFS_SB(sb)->nls) { ret = befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); if (ret < 0) { befs_debug(sb, "<--- befs_lookup() ERROR"); return ERR_PTR(ret); } ret = befs_btree_find(sb, ds, utfname, &offset); kfree(utfname); } else { ret = befs_btree_find(sb, ds, dentry->d_name.name, &offset); } if (ret == BEFS_BT_NOT_FOUND) { befs_debug(sb, "<--- befs_lookup() %s not found", dentry->d_name.name); return ERR_PTR(-ENOENT); } else if (ret != BEFS_OK || offset == 0) { befs_warning(sb, "<--- befs_lookup() Error"); return ERR_PTR(-ENODATA); } inode = iget(dir->i_sb, (ino_t) offset); if (!inode) return ERR_PTR(-EACCES); d_add(dentry, inode); befs_debug(sb, "<--- befs_lookup()"); return NULL; }
static struct dentry * befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { struct inode *inode; struct super_block *sb = dir->i_sb; const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds; befs_off_t offset; int ret; int utfnamelen; char *utfname; const char *name = dentry->d_name.name; befs_debug(sb, "---> %s name %pd inode %ld", __func__, dentry, dir->i_ino); /* Convert to UTF-8 */ if (BEFS_SB(sb)->nls) { ret = befs_nls2utf(sb, name, strlen(name), &utfname, &utfnamelen); if (ret < 0) { befs_debug(sb, "<--- %s ERROR", __func__); return ERR_PTR(ret); } ret = befs_btree_find(sb, ds, utfname, &offset); kfree(utfname); } else { ret = befs_btree_find(sb, ds, name, &offset); } if (ret == BEFS_BT_NOT_FOUND) { befs_debug(sb, "<--- %s %pd not found", __func__, dentry); d_add(dentry, NULL); return ERR_PTR(-ENOENT); } else if (ret != BEFS_OK || offset == 0) { befs_error(sb, "<--- %s Error", __func__); return ERR_PTR(-ENODATA); } inode = befs_iget(dir->i_sb, (ino_t) offset); if (IS_ERR(inode)) return ERR_CAST(inode); d_add(dentry, inode); befs_debug(sb, "<--- %s", __func__); return NULL; }
static int befs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) { struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_block_run run = BAD_IADDR; int res = 0; ulong disk_off; befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", inode->i_ino, block); if (block < 0) { befs_error(sb, "befs_get_block() was asked for a block " "number less than zero: block %ld in inode %lu", block, inode->i_ino); return -EIO; } if (create) { befs_error(sb, "befs_get_block() was asked to write to " "block %ld in inode %lu", block, inode->i_ino); return -EPERM; } res = befs_fblock2brun(sb, ds, block, &run); if (res != BEFS_OK) { befs_error(sb, "<--- befs_get_block() for inode %lu, block " "%ld ERROR", inode->i_ino, block); return -EFBIG; } disk_off = (ulong) iaddr2blockno(sb, &run); map_bh(bh_result, inode->i_sb, disk_off); befs_debug(sb, "<--- befs_get_block() for inode %lu, block %ld, " "disk address %lu", inode->i_ino, block, disk_off); return 0; }
static int befs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_result, int create) { struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_block_run run = BAD_IADDR; int res; ulong disk_off; befs_debug(sb, "---> befs_get_block() for inode %lu, block %ld", (unsigned long)inode->i_ino, (long)block); if (create) { befs_error(sb, "befs_get_block() was asked to write to " "block %ld in inode %lu", (long)block, (unsigned long)inode->i_ino); return -EPERM; } res = befs_fblock2brun(sb, ds, block, &run); if (res != BEFS_OK) { befs_error(sb, "<--- %s for inode %lu, block %ld ERROR", __func__, (unsigned long)inode->i_ino, (long)block); return -EFBIG; } disk_off = (ulong) iaddr2blockno(sb, &run); map_bh(bh_result, inode->i_sb, disk_off); befs_debug(sb, "<--- %s for inode %lu, block %ld, disk address %lu", __func__, (unsigned long)inode->i_ino, (long)block, (unsigned long)disk_off); return 0; }
static struct inode *befs_iget(struct super_block *sb, unsigned long ino) { struct buffer_head *bh = NULL; befs_inode *raw_inode = NULL; befs_sb_info *befs_sb = BEFS_SB(sb); befs_inode_info *befs_ino = NULL; struct inode *inode; long ret = -EIO; befs_debug(sb, "---> befs_read_inode() " "inode = %lu", ino); inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; befs_ino = BEFS_I(inode); /* convert from vfs's inode number to befs's inode number */ befs_ino->i_inode_num = blockno2iaddr(sb, inode->i_ino); befs_debug(sb, " real inode number [%u, %hu, %hu]", befs_ino->i_inode_num.allocation_group, befs_ino->i_inode_num.start, befs_ino->i_inode_num.len); bh = befs_bread(sb, inode->i_ino); if (!bh) { befs_error(sb, "unable to read inode block - " "inode = %lu", inode->i_ino); goto unacquire_none; } raw_inode = (befs_inode *) bh->b_data; befs_dump_inode(sb, raw_inode); if (befs_check_inode(sb, raw_inode, inode->i_ino) != BEFS_OK) { befs_error(sb, "Bad inode: %lu", inode->i_ino); goto unacquire_bh; } inode->i_mode = (umode_t) fs32_to_cpu(sb, raw_inode->mode); /* * set uid and gid. But since current BeOS is single user OS, so * you can change by "uid" or "gid" options. */ inode->i_uid = befs_sb->mount_opts.use_uid ? befs_sb->mount_opts.uid : make_kuid(&init_user_ns, fs32_to_cpu(sb, raw_inode->uid)); inode->i_gid = befs_sb->mount_opts.use_gid ? befs_sb->mount_opts.gid : make_kgid(&init_user_ns, fs32_to_cpu(sb, raw_inode->gid)); set_nlink(inode, 1); /* * BEFS's time is 64 bits, but current VFS is 32 bits... * BEFS don't have access time. Nor inode change time. VFS * doesn't have creation time. * Also, the lower 16 bits of the last_modified_time and * create_time are just a counter to help ensure uniqueness * for indexing purposes. (PFD, page 54) */ inode->i_mtime.tv_sec = fs64_to_cpu(sb, raw_inode->last_modified_time) >> 16; inode->i_mtime.tv_nsec = 0; /* lower 16 bits are not a time */ inode->i_ctime = inode->i_mtime; inode->i_atime = inode->i_mtime; befs_ino->i_inode_num = fsrun_to_cpu(sb, raw_inode->inode_num); befs_ino->i_parent = fsrun_to_cpu(sb, raw_inode->parent); befs_ino->i_attribute = fsrun_to_cpu(sb, raw_inode->attributes); befs_ino->i_flags = fs32_to_cpu(sb, raw_inode->flags); if (S_ISLNK(inode->i_mode) && !(befs_ino->i_flags & BEFS_LONG_SYMLINK)){ inode->i_size = 0; inode->i_blocks = befs_sb->block_size / VFS_BLOCK_SIZE; strncpy(befs_ino->i_data.symlink, raw_inode->data.symlink, BEFS_SYMLINK_LEN - 1); befs_ino->i_data.symlink[BEFS_SYMLINK_LEN - 1] = '\0'; } else { int num_blks; befs_ino->i_data.ds = fsds_to_cpu(sb, &raw_inode->data.datastream); num_blks = befs_count_blocks(sb, &befs_ino->i_data.ds); inode->i_blocks = num_blks * (befs_sb->block_size / VFS_BLOCK_SIZE); inode->i_size = befs_ino->i_data.ds.size; } inode->i_mapping->a_ops = &befs_aops; if (S_ISREG(inode->i_mode)) { inode->i_fop = &generic_ro_fops; } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &befs_dir_inode_operations; inode->i_fop = &befs_dir_operations; } else if (S_ISLNK(inode->i_mode)) { if (befs_ino->i_flags & BEFS_LONG_SYMLINK) inode->i_op = &befs_symlink_inode_operations; else inode->i_op = &befs_fast_symlink_inode_operations; } else { befs_error(sb, "Inode %lu is not a regular file, " "directory or symlink. THAT IS WRONG! BeFS has no " "on disk special files", inode->i_ino); goto unacquire_bh; } brelse(bh); befs_debug(sb, "<--- befs_read_inode()"); unlock_new_inode(inode); return inode; unacquire_bh: brelse(bh); unacquire_none: iget_failed(inode); befs_debug(sb, "<--- befs_read_inode() - Bad inode"); return ERR_PTR(ret); }
static void befs_i_callback(struct rcu_head *head) { struct inode *inode = container_of(head, struct inode, i_rcu); kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); }
static int befs_readdir(struct file *file, struct dir_context *ctx) { struct inode *inode = file_inode(file); struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_off_t value; int result; size_t keysize; unsigned char d_type; char keybuf[BEFS_NAME_LEN + 1]; const char *dirname = file->f_path.dentry->d_name.name; befs_debug(sb, "---> befs_readdir() " "name %s, inode %ld, ctx->pos %Ld", dirname, inode->i_ino, ctx->pos); more: result = befs_btree_read(sb, ds, ctx->pos, BEFS_NAME_LEN + 1, keybuf, &keysize, &value); if (result == BEFS_ERR) { befs_debug(sb, "<--- befs_readdir() ERROR"); befs_error(sb, "IO error reading %s (inode %lu)", dirname, inode->i_ino); return -EIO; } else if (result == BEFS_BT_END) { befs_debug(sb, "<--- befs_readdir() END"); return 0; } else if (result == BEFS_BT_EMPTY) { befs_debug(sb, "<--- befs_readdir() Empty directory"); return 0; } d_type = DT_UNKNOWN; /* Convert to NLS */ if (BEFS_SB(sb)->nls) { char *nlsname; int nlsnamelen; result = befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen); if (result < 0) { befs_debug(sb, "<--- befs_readdir() ERROR"); return result; } if (!dir_emit(ctx, nlsname, nlsnamelen, (ino_t) value, d_type)) { kfree(nlsname); return 0; } kfree(nlsname); } else { if (!dir_emit(ctx, keybuf, keysize, (ino_t) value, d_type)) return 0; } ctx->pos++; goto more; befs_debug(sb, "<--- befs_readdir() pos %Ld", ctx->pos); return 0; }
static void befs_destroy_inode(struct inode *inode) { kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); }
static int befs_readdir(struct file *filp, void *dirent, filldir_t filldir) { struct inode *inode = filp->f_dentry->d_inode; struct super_block *sb = inode->i_sb; befs_data_stream *ds = &BEFS_I(inode)->i_data.ds; befs_off_t value; int result; size_t keysize; unsigned char d_type; char keybuf[BEFS_NAME_LEN + 1]; char *nlsname; int nlsnamelen; const char *dirname = filp->f_dentry->d_name.name; befs_debug(sb, "---> befs_readdir() " "name %s, inode %ld, filp->f_pos %Ld", dirname, inode->i_ino, filp->f_pos); result = befs_btree_read(sb, ds, filp->f_pos, BEFS_NAME_LEN + 1, keybuf, &keysize, &value); if (result == BEFS_ERR) { befs_debug(sb, "<--- befs_readdir() ERROR"); befs_error(sb, "IO error reading %s (inode %lu)", dirname, inode->i_ino); return -EIO; } else if (result == BEFS_BT_END) { befs_debug(sb, "<--- befs_readdir() END"); return 0; } else if (result == BEFS_BT_EMPTY) { befs_debug(sb, "<--- befs_readdir() Empty directory"); return 0; } d_type = DT_UNKNOWN; /* Convert to NLS */ if (BEFS_SB(sb)->nls) { result = befs_utf2nls(sb, keybuf, keysize, &nlsname, &nlsnamelen); if (result < 0) { befs_debug(sb, "<--- befs_readdir() ERROR"); return result; } result = filldir(dirent, nlsname, nlsnamelen, filp->f_pos, (ino_t) value, d_type); kfree(nlsname); } else { result = filldir(dirent, keybuf, keysize, filp->f_pos, (ino_t) value, d_type); } filp->f_pos++; befs_debug(sb, "<--- befs_readdir() filp->f_pos %Ld", filp->f_pos); return 0; }
static void befs_i_callback(struct rcu_head *head) { struct inode *inode = container_of(head, struct inode, i_rcu); INIT_LIST_HEAD(&inode->i_dentry); kmem_cache_free(befs_inode_cachep, BEFS_I(inode)); }