C++ (Cpp) befs_btree_read Examples

Example #1

File: linuxvfs.c Project: Abioy/kasan

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];

	befs_debug(sb, "---> %s name %pD, inode %ld, ctx->pos %lld",
		  __func__, file, 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, "<--- %s ERROR", __func__);
		befs_error(sb, "IO error reading %pD (inode %lu)",
			   file, inode->i_ino);
		return -EIO;

	} else if (result == BEFS_BT_END) {
		befs_debug(sb, "<--- %s END", __func__);
		return 0;

	} else if (result == BEFS_BT_EMPTY) {
		befs_debug(sb, "<--- %s Empty directory", __func__);
		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, "<--- %s ERROR", __func__);
			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;
}

Example #2

File: linuxvfs.c Project: liucx6312/supermicro_ipmi_firmware

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;
}