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fs: implement size/fatsize/ext4size

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These commands may be used to determine the size of a file without
actually reading the whole file content into memory. This may be used
to determine if the file will fit into the memory buffer that will
contain it. In particular, the DFU code will use it for this purpose
in the next commit.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2014-06-11 12:47:26 -06:00 • committed by Tom Rini
parent e76b933e02
commit cf6598193a
11 changed files with 110 additions and 0 deletions
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9
include/fs.h
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@ -50,6 +50,13 @@ int fs_ls(const char *dirname);
*/
int fs_exists(const char *filename);
/*
* Determine a file's size
*
* Returns the file's size in bytes, or a negative value if it doesn't exist.
*/
int fs_size(const char *filename);
/*
* Read file "filename" from the partition previously set by fs_set_blk_dev(),
* to address "addr", starting at byte offset "offset", and reading "len"
@ -75,6 +82,8 @@ int fs_write(const char *filename, ulong addr, int offset, int len);
* Common implementation for various filesystem commands, optionally limited
* to a specific filesystem type via the fstype parameter.
*/
int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],