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fs: add fs_readdir()

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Needed to support efi file protocol.  The fallback.efi loader wants
to be able to read the contents of the /EFI directory to find an OS
to boot.

Modelled after POSIX opendir()/readdir()/closedir().  Unlike the other
fs APIs, this is stateful (ie. state is held in the FS_DIR "directory
stream"), to avoid re-traversing of the directory structure at each
step.  The directory stream must be released with closedir() when it
is no longer needed.

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Łukasz Majewski <lukma@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Rob Clark
2017-09-09 13:15:55 -04:00
committed by Tom Rini
parent 8eafae209c
commit 4bbcc965f9
4 changed files with 199 additions and 12 deletions
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31
disk/part.c
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@@ -331,6 +331,24 @@ int part_get_info(struct blk_desc *dev_desc, int part,
return -1;
}
int part_get_info_whole_disk(struct blk_desc *dev_desc, disk_partition_t *info)
{
info->start = 0;
info->size = dev_desc->lba;
info->blksz = dev_desc->blksz;
info->bootable = 0;
strcpy((char *)info->type, BOOT_PART_TYPE);
strcpy((char *)info->name, "Whole Disk");
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
info->uuid[0] = 0;
#endif
#ifdef CONFIG_PARTITION_TYPE_GUID
info->type_guid[0] = 0;
#endif
return 0;
}
int blk_get_device_by_str(const char *ifname, const char *dev_hwpart_str,
struct blk_desc **dev_desc)
{
@@ -523,18 +541,7 @@ int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
(*dev_desc)->log2blksz = LOG2((*dev_desc)->blksz);
info->start = 0;
info->size = (*dev_desc)->lba;
info->blksz = (*dev_desc)->blksz;
info->bootable = 0;
strcpy((char *)info->type, BOOT_PART_TYPE);
strcpy((char *)info->name, "Whole Disk");
#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
info->uuid[0] = 0;
#endif
#ifdef CONFIG_PARTITION_TYPE_GUID
info->type_guid[0] = 0;
#endif
part_get_info_whole_disk(*dev_desc, info);
ret = 0;
goto cleanup;