From c749ba912e87ccebd674ae24b97462176c63732e Mon Sep 17 00:00:00 2001
From: Mimi Zohar <zohar@linux.vnet.ibm.com>
Date: Tue, 23 Nov 2010 18:54:16 -0500
Subject: [PATCH] key: add tpm_send command
Add internal kernel tpm_send() command used to seal/unseal keys.
Changelog:
- replaced module_put in tpm_send() with new tpm_chip_put() wrapper
(suggested by David Howells)
- Make tpm_send() cmd argument a 'void *' (suggested by David Howells)
Signed-off-by: David Safford <safford@watson.ibm.com>
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Signed-off-by: James Morris <jmorris@namei.org>
---
drivers/char/tpm/tpm.c | 16 ++++++++++++++++
include/linux/tpm.h | 4 ++++
2 files changed, 20 insertions(+)
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 26c09f3b4a74..068bac858b4a 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -780,6 +780,22 @@ int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash)
}
EXPORT_SYMBOL_GPL(tpm_pcr_extend);
+int tpm_send(u32 chip_num, void *cmd, size_t buflen)
+{
+ struct tpm_chip *chip;
+ int rc;
+
+ chip = tpm_chip_find_get(chip_num);
+ if (chip == NULL)
+ return -ENODEV;
+
+ rc = transmit_cmd(chip, cmd, buflen, "attempting tpm_cmd");
+
+ tpm_chip_put(chip);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(tpm_send);
+
ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
char *buf)
{
diff --git a/include/linux/tpm.h b/include/linux/tpm.h
index ac5d1c1285d9..fdc718abf83b 100644
--- a/include/linux/tpm.h
+++ b/include/linux/tpm.h
@@ -31,6 +31,7 @@
extern int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf);
extern int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash);
+extern int tpm_send(u32 chip_num, void *cmd, size_t buflen);
#else
static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
return -ENODEV;
@@ -38,5 +39,8 @@ static inline int tpm_pcr_read(u32 chip_num, int pcr_idx, u8 *res_buf) {
static inline int tpm_pcr_extend(u32 chip_num, int pcr_idx, const u8 *hash) {
return -ENODEV;
}
+static inline int tpm_send(u32 chip_num, void *cmd, size_t buflen) {
+ return -ENODEV;
+}
#endif
#endif
--
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