[U-Boot] [PATCH 1/4] fs: Add command to retrieve the filesystem type

Sjoerd Simons
2015-01-05T17:13:36Z

New command to determine the filesystem type of a given partition.
Optionally stores the filesystem type in a environment variable.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
---
common/cmd_fs.c | 15 +++++++++++++++
fs/fs.c | 27 +++++++++++++++++++++++++++
include/fs.h | 6 ++++++
3 files changed, 48 insertions(+)

diff --git a/common/cmd_fs.c b/common/cmd_fs.c
index 0d9da11..e146254 100644
--- a/common/cmd_fs.c
+++ b/common/cmd_fs.c
@@ -81,3 +81,18 @@ U_BOOT_CMD(
" - List files in directory 'directory' of partition 'part' on\n"
" device type 'interface' instance 'dev'."
)
+
+static int do_fstype_wrapper(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ return do_fs_type(cmdtp, flag, argc, argv);
+}
+
+U_BOOT_CMD(
+ fstype, 4, 1, do_fstype_wrapper,
+ "Look up a filesystem type",
+ "<interface> <dev>:<part>\n"
+ "- print filesystem type\n"
+ "fstype <interface> <dev>:<part> <varname>\n"
+ "- set environment variable to filesystem type\n"
+);
diff --git a/fs/fs.c b/fs/fs.c
index ddd751c..483273f 100644
--- a/fs/fs.c
+++ b/fs/fs.c
@@ -79,6 +79,7 @@ static inline int fs_uuid_unsupported(char *uuid_str)

struct fstype_info {
int fstype;
+ char *name;
/*
* Is it legal to pass NULL as .probe()'s fs_dev_desc parameter? This
* should be false in most cases. For "virtual" filesystems which
@@ -105,6 +106,7 @@ static struct fstype_info fstypes[] = {
#ifdef CONFIG_FS_FAT
{
.fstype = FS_TYPE_FAT,
+ .name = "fat",
.null_dev_desc_ok = false,
.probe = fat_set_blk_dev,
.close = fat_close,
@@ -123,6 +125,7 @@ static struct fstype_info fstypes[] = {
#ifdef CONFIG_FS_EXT4
{
.fstype = FS_TYPE_EXT,
+ .name = "ext4",
.null_dev_desc_ok = false,
.probe = ext4fs_probe,
.close = ext4fs_close,
@@ -141,6 +144,7 @@ static struct fstype_info fstypes[] = {
#ifdef CONFIG_SANDBOX
{
.fstype = FS_TYPE_SANDBOX,
+ .name = "sandbox",
.null_dev_desc_ok = true,
.probe = sandbox_fs_set_blk_dev,
.close = sandbox_fs_close,
@@ -154,6 +158,7 @@ static struct fstype_info fstypes[] = {
#endif
{
.fstype = FS_TYPE_ANY,
+ .name = "unsupported",
.null_dev_desc_ok = true,
.probe = fs_probe_unsupported,
.close = fs_close_unsupported,
@@ -190,6 +195,7 @@ int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
if (!relocated) {
for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
i++, info++) {
+ info->name += gd->reloc_off;
info->probe += gd->reloc_off;
info->close += gd->reloc_off;
info->ls += gd->reloc_off;
@@ -503,3 +509,24 @@ int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],

return CMD_RET_SUCCESS;
}
+
+int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+ struct fstype_info *info;
+
+ if (argc < 3 || argc > 4)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], argv[2], FS_TYPE_ANY))
+ return 1;
+
+ info = fs_get_info(fs_type);
+
+ if (argc == 4)
+ setenv(argv[3], info->name);
+ else
+ printf("%s\n", info->name);
+
+ return CMD_RET_SUCCESS;
+}
+
diff --git a/include/fs.h b/include/fs.h
index ffb6ce7..fd1e4ab 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -109,4 +109,10 @@ int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int do_fs_uuid(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);

+/*
+ * Determine the type of the specified filesystem and print it. Optionally it is
+ * possible to store the type directly in env.
+ */
+int do_fs_type(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
+
#endif /* _FS_H */
--
2.1.4