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-rw-r--r--src/include/cbfs.h72
-rw-r--r--src/include/cbfs_private.h23
-rw-r--r--src/lib/cbfs.c16
3 files changed, 80 insertions, 31 deletions
diff --git a/src/include/cbfs.h b/src/include/cbfs.h
index f6309a3e30..43d8123454 100644
--- a/src/include/cbfs.h
+++ b/src/include/cbfs.h
@@ -7,6 +7,7 @@
#include <commonlib/bsd/cbfs_mdata.h>
#include <commonlib/cbfs.h>
#include <commonlib/mem_pool.h>
+#include <commonlib/region.h>
#include <program_loading.h>
#include <types.h>
#include <vb2_sha.h>
@@ -119,6 +120,20 @@ void cbfs_unmap(void *mapping);
/* Load stage into memory filling in prog. Return 0 on success. < 0 on error. */
int cbfs_prog_stage_load(struct prog *prog);
+/* Returns the size of a CBFS file, or 0 on error. Avoid using this function to allocate space,
+ and instead use cbfs_alloc() so the file only needs to be looked up once. */
+static inline size_t cbfs_get_size(const char *name);
+static inline size_t cbfs_ro_get_size(const char *name);
+
+/* Returns the type of a CBFS file, or CBFS_TYPE_NULL on error. Use cbfs_type_load() instead of
+ this where possible to avoid looking up the file more than once. */
+static inline enum cbfs_type cbfs_get_type(const char *name);
+static inline enum cbfs_type cbfs_ro_get_type(const char *name);
+
+/* Check whether a CBFS file exists. */
+static inline bool cbfs_file_exists(const char *name);
+static inline bool cbfs_ro_file_exists(const char *name);
+
/**********************************************************************************************
* BOOT DEVICE HELPER APIs *
@@ -173,6 +188,9 @@ int cbfs_locate_file_in_region(struct cbfsf *fh, const char *region_name,
/**********************************************************************************************
* INTERNAL HELPERS FOR INLINES, DO NOT USE. *
**********************************************************************************************/
+cb_err_t _cbfs_boot_lookup(const char *name, bool force_ro,
+ union cbfs_mdata *mdata, struct region_device *rdev);
+
void *_cbfs_alloc(const char *name, cbfs_allocator_t allocator, void *arg,
size_t *size_out, bool force_ro, enum cbfs_type *type);
@@ -287,4 +305,58 @@ static inline void *cbfs_ro_type_cbmem_alloc(const char *name, uint32_t cbmem_id
size_out, type);
}
+static inline size_t cbfs_get_size(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, false, &mdata, &rdev) != CB_SUCCESS)
+ return 0;
+ return be32toh(mdata.h.len);
+}
+
+static inline size_t cbfs_ro_get_size(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, true, &mdata, &rdev) != CB_SUCCESS)
+ return 0;
+ return be32toh(mdata.h.len);
+}
+
+static inline enum cbfs_type cbfs_get_type(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, false, &mdata, &rdev) != CB_SUCCESS)
+ return CBFS_TYPE_NULL;
+ return be32toh(mdata.h.type);
+}
+
+static inline enum cbfs_type cbfs_ro_get_type(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, true, &mdata, &rdev) != CB_SUCCESS)
+ return CBFS_TYPE_NULL;
+ return be32toh(mdata.h.type);
+}
+
+static inline bool cbfs_file_exists(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, false, &mdata, &rdev) != CB_SUCCESS)
+ return false;
+ return true;
+}
+
+static inline bool cbfs_ro_file_exists(const char *name)
+{
+ union cbfs_mdata mdata;
+ struct region_device rdev;
+ if (_cbfs_boot_lookup(name, true, &mdata, &rdev) != CB_SUCCESS)
+ return false;
+ return true;
+}
+
#endif
diff --git a/src/include/cbfs_private.h b/src/include/cbfs_private.h
deleted file mode 100644
index 8e9803616f..0000000000
--- a/src/include/cbfs_private.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef _CBFS_PRIVATE_H_
-#define _CBFS_PRIVATE_H_
-
-#include <commonlib/bsd/cbfs_private.h>
-#include <commonlib/region.h>
-#include <types.h>
-
-/*
- * This header contains low-level CBFS APIs that should only be used by code
- * that really needs this level of access. Most code (particularly platform
- * code) should use the higher-level CBFS APIs in <cbfs.h>. Code using these
- * APIs needs to take special care to ensure CBFS file data is verified (in a
- * TOCTOU-safe manner) before access (TODO: add details on how to do this once
- * file verification code is in).
- */
-
-/* Find by name, load metadata into |mdata| and chain file data to |rdev|. */
-cb_err_t cbfs_boot_lookup(const char *name, bool force_ro,
- union cbfs_mdata *mdata, struct region_device *rdev);
-
-#endif
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index dbb3b1a913..1ffc69508a 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -3,8 +3,8 @@
#include <assert.h>
#include <boot_device.h>
#include <cbfs.h>
-#include <cbfs_private.h>
#include <cbmem.h>
+#include <commonlib/bsd/cbfs_private.h>
#include <commonlib/bsd/compression.h>
#include <commonlib/endian.h>
#include <console/console.h>
@@ -35,8 +35,8 @@ static void switch_to_postram_cache(int unused)
}
ROMSTAGE_CBMEM_INIT_HOOK(switch_to_postram_cache);
-cb_err_t cbfs_boot_lookup(const char *name, bool force_ro,
- union cbfs_mdata *mdata, struct region_device *rdev)
+cb_err_t _cbfs_boot_lookup(const char *name, bool force_ro,
+ union cbfs_mdata *mdata, struct region_device *rdev)
{
const struct cbfs_boot_device *cbd = cbfs_get_boot_device(force_ro);
if (!cbd)
@@ -65,7 +65,7 @@ cb_err_t cbfs_boot_lookup(const char *name, bool force_ro,
if (CONFIG(VBOOT_ENABLE_CBFS_FALLBACK) && !force_ro && err == CB_CBFS_NOT_FOUND) {
printk(BIOS_INFO, "CBFS: Fall back to RO region for %s\n", name);
- return cbfs_boot_lookup(name, true, mdata, rdev);
+ return _cbfs_boot_lookup(name, true, mdata, rdev);
}
if (err) {
if (err == CB_CBFS_NOT_FOUND)
@@ -90,7 +90,7 @@ cb_err_t cbfs_boot_lookup(const char *name, bool force_ro,
int cbfs_boot_locate(struct cbfsf *fh, const char *name, uint32_t *type)
{
- if (cbfs_boot_lookup(name, false, &fh->mdata, &fh->data))
+ if (_cbfs_boot_lookup(name, false, &fh->mdata, &fh->data))
return -1;
size_t msize = be32toh(fh->mdata.h.offset);
@@ -330,7 +330,7 @@ void cbfs_preload(const char *name)
DEBUG("%s(name='%s')\n", __func__, name);
- if (cbfs_boot_lookup(name, force_ro, &mdata, &rdev))
+ if (_cbfs_boot_lookup(name, force_ro, &mdata, &rdev))
return;
size = region_device_sz(&rdev);
@@ -422,7 +422,7 @@ void *_cbfs_alloc(const char *name, cbfs_allocator_t allocator, void *arg,
DEBUG("%s(name='%s', alloc=%p(%p), force_ro=%s, type=%d)\n", __func__, name, allocator,
arg, force_ro ? "true" : "false", type ? *type : -1);
- if (cbfs_boot_lookup(name, force_ro, &mdata, &rdev))
+ if (_cbfs_boot_lookup(name, force_ro, &mdata, &rdev))
return NULL;
if (type) {
@@ -525,7 +525,7 @@ cb_err_t cbfs_prog_stage_load(struct prog *pstage)
prog_locate_hook(pstage);
- if ((err = cbfs_boot_lookup(prog_name(pstage), false, &mdata, &rdev)))
+ if ((err = _cbfs_boot_lookup(prog_name(pstage), false, &mdata, &rdev)))
return err;
assert(be32toh(mdata.h.type) == CBFS_TYPE_STAGE);
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 21:49:44 +0000