The command line is: ln <interface> <dev[:part]> target linkname
Currently symbolic links are supported only in ext4 and only if the option CMD_EXT4_WRITE is enabled.
Signed-off-by: Jean-Jacques Hiblot jjhiblot@ti.com Reviewed-by: Tom Rini trini@konsulko.com ---
Changes in v5: None Changes in v4: None Changes in v3: None Changes in v2: None
cmd/fs.c | 14 ++++++++++++++ fs/fs.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ include/fs.h | 2 ++ 3 files changed, 60 insertions(+)
diff --git a/cmd/fs.c b/cmd/fs.c index 8064a1c84d..ba0e08cd12 100644 --- a/cmd/fs.c +++ b/cmd/fs.c @@ -74,6 +74,20 @@ U_BOOT_CMD( " device type 'interface' instance 'dev'." )
+static int do_ln_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + return do_ln(cmdtp, flag, argc, argv, FS_TYPE_ANY); +} + +U_BOOT_CMD( + ln, 5, 1, do_ln_wrapper, + "Create a symbolic link", + "<interface> <dev[:part]> target linkname\n" + " - create a symbolic link to 'target' with the name 'linkname' on\n" + " device type 'interface' instance 'dev'." +) + static int do_fstype_wrapper(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { diff --git a/fs/fs.c b/fs/fs.c index c5c35ebf5f..736ebef4a9 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -90,6 +90,11 @@ static inline int fs_write_unsupported(const char *filename, void *buf, return -1; }
+static inline int fs_ln_unsupported(const char *filename, const char *target) +{ + return -1; +} + static inline void fs_close_unsupported(void) { } @@ -154,6 +159,7 @@ struct fstype_info { void (*closedir)(struct fs_dir_stream *dirs); int (*unlink)(const char *filename); int (*mkdir)(const char *dirname); + int (*ln)(const char *filename, const char *target); };
static struct fstype_info fstypes[] = { @@ -181,6 +187,7 @@ static struct fstype_info fstypes[] = { .opendir = fat_opendir, .readdir = fat_readdir, .closedir = fat_closedir, + .ln = fs_ln_unsupported, }, #endif
@@ -197,8 +204,10 @@ static struct fstype_info fstypes[] = { .read = ext4_read_file, #ifdef CONFIG_CMD_EXT4_WRITE .write = ext4_write_file, + .ln = ext4fs_create_link, #else .write = fs_write_unsupported, + .ln = fs_ln_unsupported, #endif .uuid = ext4fs_uuid, .opendir = fs_opendir_unsupported, @@ -222,6 +231,7 @@ static struct fstype_info fstypes[] = { .opendir = fs_opendir_unsupported, .unlink = fs_unlink_unsupported, .mkdir = fs_mkdir_unsupported, + .ln = fs_ln_unsupported, }, #endif #ifdef CONFIG_CMD_UBIFS @@ -240,6 +250,7 @@ static struct fstype_info fstypes[] = { .opendir = fs_opendir_unsupported, .unlink = fs_unlink_unsupported, .mkdir = fs_mkdir_unsupported, + .ln = fs_ln_unsupported, }, #endif #ifdef CONFIG_FS_BTRFS @@ -258,6 +269,7 @@ static struct fstype_info fstypes[] = { .opendir = fs_opendir_unsupported, .unlink = fs_unlink_unsupported, .mkdir = fs_mkdir_unsupported, + .ln = fs_ln_unsupported, }, #endif { @@ -275,6 +287,7 @@ static struct fstype_info fstypes[] = { .opendir = fs_opendir_unsupported, .unlink = fs_unlink_unsupported, .mkdir = fs_mkdir_unsupported, + .ln = fs_ln_unsupported, }, };
@@ -602,6 +615,22 @@ int fs_mkdir(const char *dirname) return ret; }
+int fs_ln(const char *fname, const char *target) +{ + struct fstype_info *info = fs_get_info(fs_type); + int ret; + + ret = info->ln(fname, target); + + if (ret < 0) { + printf("** Unable to create link %s -> %s **\n", fname, target); + ret = -1; + } + fs_close(); + + return ret; +} + int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype) { @@ -840,3 +869,18 @@ int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
return 0; } + +int do_ln(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], + int fstype) +{ + if (argc != 5) + return CMD_RET_USAGE; + + if (fs_set_blk_dev(argv[1], argv[2], fstype)) + return 1; + + if (fs_ln(argv[3], argv[4])) + return 1; + + return 0; +} diff --git a/include/fs.h b/include/fs.h index aa3604db8d..6854597700 100644 --- a/include/fs.h +++ b/include/fs.h @@ -191,6 +191,8 @@ int do_rm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype); int do_mkdir(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], int fstype); +int do_ln(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[], + int fstype);
/* * Determine the UUID of the specified filesystem and print it. Optionally it is