| Message ID | 20190829143807.30647-1-jarkko.sakkinen@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | tpm: Remove duplicate code from caps_show() in tpm-sysfs.c | expand |
On Thu Aug 29 19, Jarkko Sakkinen wrote: >Replace existing TPM 1.x version structs with new structs that consolidate >the common parts into a single struct so that code duplication is no longer >needed in caps_show(). > >Cc: Alexey Klimov <aklimov@redhat.com> >Cc: Jerry Snitselaar <jsnitsel@redhat.com> >Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> >--- >Jerry, Alexey: Plese include this to the next version of your patches. >This a low priority patch alone so it does not need to be merge upfront. Will do. I'll add my Reviewed-by and Tested-by to it and submit it with v3. > drivers/char/tpm/tpm-sysfs.c | 44 ++++++++++++++++++------------------ > drivers/char/tpm/tpm.h | 23 ++++++++----------- > 2 files changed, 32 insertions(+), 35 deletions(-) > >diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c >index edfa89160010..8064fea2de59 100644 >--- a/drivers/char/tpm/tpm-sysfs.c >+++ b/drivers/char/tpm/tpm-sysfs.c >@@ -217,6 +217,7 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > struct tpm_chip *chip = to_tpm_chip(dev); >+ struct tpm1_version *version; > ssize_t rc = 0; > char *str = buf; > cap_t cap; >@@ -232,31 +233,30 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, > str += sprintf(str, "Manufacturer: 0x%x\n", > be32_to_cpu(cap.manufacturer_id)); > >- /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */ >- rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, >+ /* TPM 1.2 */ >+ if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, > "attempting to determine the 1.2 version", >- sizeof(cap.tpm_version_1_2)); >- if (!rc) { >- str += sprintf(str, >- "TCG version: %d.%d\nFirmware version: %d.%d\n", >- cap.tpm_version_1_2.Major, >- cap.tpm_version_1_2.Minor, >- cap.tpm_version_1_2.revMajor, >- cap.tpm_version_1_2.revMinor); >- } else { >- /* Otherwise just use TPM_STRUCT_VER */ >- if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, >- "attempting to determine the 1.1 version", >- sizeof(cap.tpm_version))) >- goto out_ops; >- str += sprintf(str, >- "TCG version: %d.%d\nFirmware version: %d.%d\n", >- cap.tpm_version.Major, >- cap.tpm_version.Minor, >- cap.tpm_version.revMajor, >- cap.tpm_version.revMinor); >+ sizeof(cap.version2))) { >+ version = &cap.version2.version; >+ goto out_print; > } >+ >+ /* TPM 1.1 */ >+ if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, >+ "attempting to determine the 1.1 version", >+ sizeof(cap.version1))) { >+ version = &cap.version1; >+ goto out_ops; >+ } >+ >+out_print: >+ str += sprintf(str, >+ "TCG version: %d.%d\nFirmware version: %d.%d\n", >+ version->major, version->minor, >+ version->rev_major, version->rev_minor); >+ > rc = str - buf; >+ > out_ops: > tpm_put_ops(chip); > return rc; >diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h >index a7fea3e0ca86..a4f74dd02a35 100644 >--- a/drivers/char/tpm/tpm.h >+++ b/drivers/char/tpm/tpm.h >@@ -186,19 +186,16 @@ struct stclear_flags_t { > u8 bGlobalLock; > } __packed; > >-struct tpm_version_t { >- u8 Major; >- u8 Minor; >- u8 revMajor; >- u8 revMinor; >+struct tpm1_version { >+ u8 major; >+ u8 minor; >+ u8 rev_major; >+ u8 rev_minor; > } __packed; > >-struct tpm_version_1_2_t { >- __be16 tag; >- u8 Major; >- u8 Minor; >- u8 revMajor; >- u8 revMinor; >+struct tpm1_version2 { >+ __be16 tag; >+ struct tpm1_version version; > } __packed; > > struct timeout_t { >@@ -243,8 +240,8 @@ typedef union { > struct stclear_flags_t stclear_flags; > __u8 owned; > __be32 num_pcrs; >- struct tpm_version_t tpm_version; >- struct tpm_version_1_2_t tpm_version_1_2; >+ struct tpm1_version version1; >+ struct tpm1_version2 version2; > __be32 manufacturer_id; > struct timeout_t timeout; > struct duration_t duration; >-- >2.20.1 >
On Thu Aug 29 19, Jarkko Sakkinen wrote: >Replace existing TPM 1.x version structs with new structs that consolidate >the common parts into a single struct so that code duplication is no longer >needed in caps_show(). > >Cc: Alexey Klimov <aklimov@redhat.com> >Cc: Jerry Snitselaar <jsnitsel@redhat.com> >Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> >--- >Jerry, Alexey: Plese include this to the next version of your patches. >This a low priority patch alone so it does not need to be merge upfront. > drivers/char/tpm/tpm-sysfs.c | 44 ++++++++++++++++++------------------ > drivers/char/tpm/tpm.h | 23 ++++++++----------- > 2 files changed, 32 insertions(+), 35 deletions(-) > >diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c >index edfa89160010..8064fea2de59 100644 >--- a/drivers/char/tpm/tpm-sysfs.c >+++ b/drivers/char/tpm/tpm-sysfs.c >@@ -217,6 +217,7 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > struct tpm_chip *chip = to_tpm_chip(dev); >+ struct tpm1_version *version; > ssize_t rc = 0; > char *str = buf; > cap_t cap; >@@ -232,31 +233,30 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, > str += sprintf(str, "Manufacturer: 0x%x\n", > be32_to_cpu(cap.manufacturer_id)); > >- /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */ >- rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, >+ /* TPM 1.2 */ >+ if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, > "attempting to determine the 1.2 version", >- sizeof(cap.tpm_version_1_2)); >- if (!rc) { >- str += sprintf(str, >- "TCG version: %d.%d\nFirmware version: %d.%d\n", >- cap.tpm_version_1_2.Major, >- cap.tpm_version_1_2.Minor, >- cap.tpm_version_1_2.revMajor, >- cap.tpm_version_1_2.revMinor); >- } else { >- /* Otherwise just use TPM_STRUCT_VER */ >- if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, >- "attempting to determine the 1.1 version", >- sizeof(cap.tpm_version))) >- goto out_ops; >- str += sprintf(str, >- "TCG version: %d.%d\nFirmware version: %d.%d\n", >- cap.tpm_version.Major, >- cap.tpm_version.Minor, >- cap.tpm_version.revMajor, >- cap.tpm_version.revMinor); >+ sizeof(cap.version2))) { >+ version = &cap.version2.version; >+ goto out_print; > } >+ >+ /* TPM 1.1 */ >+ if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, >+ "attempting to determine the 1.1 version", >+ sizeof(cap.version1))) { >+ version = &cap.version1; Actually looking at this again, this seems wrong. The version assignment here should be below this if, or in an else block, yes? >+ goto out_ops; >+ } >+ >+out_print: >+ str += sprintf(str, >+ "TCG version: %d.%d\nFirmware version: %d.%d\n", >+ version->major, version->minor, >+ version->rev_major, version->rev_minor); >+ > rc = str - buf; >+ > out_ops: > tpm_put_ops(chip); > return rc; >diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h >index a7fea3e0ca86..a4f74dd02a35 100644 >--- a/drivers/char/tpm/tpm.h >+++ b/drivers/char/tpm/tpm.h >@@ -186,19 +186,16 @@ struct stclear_flags_t { > u8 bGlobalLock; > } __packed; > >-struct tpm_version_t { >- u8 Major; >- u8 Minor; >- u8 revMajor; >- u8 revMinor; >+struct tpm1_version { >+ u8 major; >+ u8 minor; >+ u8 rev_major; >+ u8 rev_minor; > } __packed; > >-struct tpm_version_1_2_t { >- __be16 tag; >- u8 Major; >- u8 Minor; >- u8 revMajor; >- u8 revMinor; >+struct tpm1_version2 { >+ __be16 tag; >+ struct tpm1_version version; > } __packed; > > struct timeout_t { >@@ -243,8 +240,8 @@ typedef union { > struct stclear_flags_t stclear_flags; > __u8 owned; > __be32 num_pcrs; >- struct tpm_version_t tpm_version; >- struct tpm_version_1_2_t tpm_version_1_2; >+ struct tpm1_version version1; >+ struct tpm1_version2 version2; > __be32 manufacturer_id; > struct timeout_t timeout; > struct duration_t duration; >-- >2.20.1 >
On Fri, Aug 30, 2019 at 09:09:02AM -0700, Jerry Snitselaar wrote: > On Thu Aug 29 19, Jarkko Sakkinen wrote: > + /* TPM 1.1 */ > > + if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, > > + "attempting to determine the 1.1 version", > > + sizeof(cap.version1))) { > > + version = &cap.version1; :> > Actually looking at this again, this seems wrong. The version > assignment here should be below this if, or in an else block, yes? Absolutely is in a wrong place. I sent an updated patch: https://patchwork.kernel.org/patch/11126741/ /Jarkko
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index edfa89160010..8064fea2de59 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -217,6 +217,7 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, char *buf) { struct tpm_chip *chip = to_tpm_chip(dev); + struct tpm1_version *version; ssize_t rc = 0; char *str = buf; cap_t cap; @@ -232,31 +233,30 @@ static ssize_t caps_show(struct device *dev, struct device_attribute *attr, str += sprintf(str, "Manufacturer: 0x%x\n", be32_to_cpu(cap.manufacturer_id)); - /* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */ - rc = tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, + /* TPM 1.2 */ + if (!tpm1_getcap(chip, TPM_CAP_VERSION_1_2, &cap, "attempting to determine the 1.2 version", - sizeof(cap.tpm_version_1_2)); - if (!rc) { - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - cap.tpm_version_1_2.Major, - cap.tpm_version_1_2.Minor, - cap.tpm_version_1_2.revMajor, - cap.tpm_version_1_2.revMinor); - } else { - /* Otherwise just use TPM_STRUCT_VER */ - if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, - "attempting to determine the 1.1 version", - sizeof(cap.tpm_version))) - goto out_ops; - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - cap.tpm_version.Major, - cap.tpm_version.Minor, - cap.tpm_version.revMajor, - cap.tpm_version.revMinor); + sizeof(cap.version2))) { + version = &cap.version2.version; + goto out_print; } + + /* TPM 1.1 */ + if (tpm1_getcap(chip, TPM_CAP_VERSION_1_1, &cap, + "attempting to determine the 1.1 version", + sizeof(cap.version1))) { + version = &cap.version1; + goto out_ops; + } + +out_print: + str += sprintf(str, + "TCG version: %d.%d\nFirmware version: %d.%d\n", + version->major, version->minor, + version->rev_major, version->rev_minor); + rc = str - buf; + out_ops: tpm_put_ops(chip); return rc; diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index a7fea3e0ca86..a4f74dd02a35 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -186,19 +186,16 @@ struct stclear_flags_t { u8 bGlobalLock; } __packed; -struct tpm_version_t { - u8 Major; - u8 Minor; - u8 revMajor; - u8 revMinor; +struct tpm1_version { + u8 major; + u8 minor; + u8 rev_major; + u8 rev_minor; } __packed; -struct tpm_version_1_2_t { - __be16 tag; - u8 Major; - u8 Minor; - u8 revMajor; - u8 revMinor; +struct tpm1_version2 { + __be16 tag; + struct tpm1_version version; } __packed; struct timeout_t { @@ -243,8 +240,8 @@ typedef union { struct stclear_flags_t stclear_flags; __u8 owned; __be32 num_pcrs; - struct tpm_version_t tpm_version; - struct tpm_version_1_2_t tpm_version_1_2; + struct tpm1_version version1; + struct tpm1_version2 version2; __be32 manufacturer_id; struct timeout_t timeout; struct duration_t duration;
Replace existing TPM 1.x version structs with new structs that consolidate the common parts into a single struct so that code duplication is no longer needed in caps_show(). Cc: Alexey Klimov <aklimov@redhat.com> Cc: Jerry Snitselaar <jsnitsel@redhat.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> --- Jerry, Alexey: Plese include this to the next version of your patches. This a low priority patch alone so it does not need to be merge upfront. drivers/char/tpm/tpm-sysfs.c | 44 ++++++++++++++++++------------------ drivers/char/tpm/tpm.h | 23 ++++++++----------- 2 files changed, 32 insertions(+), 35 deletions(-)