Hi
On 13/03/13 22:03, Simon Glass wrote:
Hi Adnan,
On Wed, Mar 13, 2013 at 4:48 AM, Adnan Ali <adnan....@codethink.co.uk> wrote:
Introduces btrfs file-system to read file from
volume/sub-volumes with btrload command. This
implementation has read-only support.
This btrfs implementation is based on syslinux btrfs
code, commit 269ebc845ebc8b46ef4b0be7fa0005c7fdb95b8d.
v6: patch re-formated.
v5: merged with master.
v4: btrls command added.
v3: patch re-formated.
v2: patch error removed.
Signed-off-by: Adnan Ali <adnan....@codethink.co.uk>
Sorry there are just a few more nits here, otherwise it looks fine to me.
Thanks for reply, below are my comments
---
Makefile | 1 +
common/Makefile | 1 +
common/cmd_btr.c | 65 +++
fs/btrfs/Makefile | 51 ++
fs/btrfs/btrfs.c | 1355 ++++++++++++++++++++++++++++++++++++++++++++
fs/btrfs/crc32_c.c | 40 ++
fs/fs.c | 10 +
include/btrfs.h | 416 ++++++++++++++
include/config_fallbacks.h | 4 +
include/fs.h | 1 +
10 files changed, 1944 insertions(+)
create mode 100644 common/cmd_btr.c
create mode 100644 fs/btrfs/Makefile
create mode 100644 fs/btrfs/btrfs.c
create mode 100644 fs/btrfs/crc32_c.c
create mode 100644 include/btrfs.h
[...]
diff --git a/fs/btrfs/btrfs.c b/fs/btrfs/btrfs.c
new file mode 100644
index 0000000..19db3a3
--- /dev/null
+++ b/fs/btrfs/btrfs.c
@@ -0,0 +1,1355 @@
+/*
+ * (C) Copyright 2013 Codethink Limited
+ * Btrfs port to Uboot by
+ * Adnan Ali <adnan....@codethink.co.uk>
+
+ * btrfs.c -- readonly btrfs support for syslinux
+ * Some data structures are derivated from btrfs-tools-0.19 ctree.h
+ * Copyright 2009 Intel Corporation; author: alek...@intel.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+ * Boston MA 02111-1307, USA; either version 2 of the License, or
+ * (at your option) any later version; incorporated herein by reference.
+ *
+ */
+
+#include <common.h>
+#include <btrfs.h>
+#include <command.h>
+#include <config.h>
+#include <fs.h>
+#include <linux/compiler.h>
+#include <linux/ctype.h>
+#include <linux/stat.h>
+#include <asm/byteorder.h>
+
+unsigned long btr_part_offset;
+static u16 build_crc_table=1;
Better as u8 I think, or just char (since I don't think we have our
bool type yet). Also if you change it around to 'crc_table_built' then
it can start as 0 (i.e. you don't need to assign it) and this avoid
using the data section.
Ack (Even though that looks fine)
Note also that you have some lines ending with space, including this one.
Ack i will to remove spaces from top where variables are
declared before btrfs code is this fine with you.
+struct btrfs_info fs;
+
+/*
+ * mount btrfs file-system
+ */
+int btrfs_probe(block_dev_desc_t *rbdd, disk_partition_t *info)
+{
+ btrfs_block_dev_desc = rbdd;
+ part_info = info;
+ btr_part_offset = info->start;
+ if (btrfs_fs_init(&fs) < 0 ) {
+ debug("btrfs probe failed\n");
Here I think you need two tabs.
Ack
+
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Read file data
+ */
+int btrfs_read_file(const char *filename, void *buf, int offset, int len)
+{
+ int file_len=0;
+ int len_read;
+ struct com32_filedata filedata;
+ int handle;
+ if (offset != 0) {
+ debug("** Cannot support non-zero offset **\n");
+
+ return -1;
+ }
+
+ handle=btrfs_open_file(filename, &filedata);
+ if (handle < 0) {
+ debug("** File not found %s Invalid handle**\n", filename);
+
+ return -1;
+ }
+
+ /*file handle is valid get the size of the file*/
+ len = filedata.size;
+ if (len == 0)
+ len = file_len;
+
+ len_read = getfssec(&filedata, (char *)buf);
+ if (len_read != len) {
+ debug("** Unable to read file %s **\n", filename);
+
+ return -1;
+ }
+
+ return len_read;
+
+}
+
+/*
+ * Show directory entries
+ */
+char btrfs_ls(char *dirname)
+{
+ struct btrfs_dirent *de;
+ struct _DIR_ *dir;
+
+ if(*dirname == '/' && *(dirname+1) == 0)
+ *dirname = '.';
+
+ dir = opendir(dirname);
+ if (dir == NULL)
+ return -1;
+
+ while ((de = readdir(dir)) != NULL)
+ ;
I think this ; should be intented
Sure this is. I think you missed my comments in
previous mail where i mentioned that readdir()
prints contents on media. It loops until the last
item on media. This ; completes while loop format.
I hope this answered your question.
+
+ return 0;
+}
+
+/*
+ * umount btrfs file-system
+ */
+void btrfs_close(void)
+{
+}
diff --git a/fs/btrfs/crc32_c.c b/fs/btrfs/crc32_c.c
new file mode 100644
index 0000000..b97c98a
--- /dev/null
+++ b/fs/btrfs/crc32_c.c
What do you think about moving this into lib/ ?
I think i have to move it to lib/. Even though
you told me to move it to fs/btrfs/ earlier mails.
Ack
Going to send these changes in v7.
@@ -0,0 +1,40 @@
+/*
+ * Copied from Linux kernel crypto/crc32c.c
+ * Copyright (c) 2004 Cisco Systems, Inc.
+ * Copyright (c) 2008 Herbert Xu <herb...@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
Regards,
Simon
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