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Violators will be prosecuted; Fri, 28 Apr 2017 07:02:25 -0600 Received: from b03ledav005.gho.boulder.ibm.com (b03ledav005.gho.boulder.ibm.com [9.17.130.236]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v3SD2PLd16843228; Fri, 28 Apr 2017 06:02:25 -0700 Received: from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EAE0ABE038; Fri, 28 Apr 2017 07:02:24 -0600 (MDT) Received: from sbct-3.watson.ibm.com (unknown [9.2.141.158]) by b03ledav005.gho.boulder.ibm.com (Postfix) with ESMTP id 50CE4BE03E; Fri, 28 Apr 2017 07:02:24 -0600 (MDT) From: Stefan Berger To: tpmdd-devel@lists.sourceforge.net, linux-security-module@vger.kernel.org, jarkko.sakkinen@linux.intel.com Cc: jgunthorpe@obsidianresearch.com, linux-kernel@vger.kernel.org, Stefan Berger Subject: [PATCH v2 1/3] tpm: vtpm_proxy: Add ioctl to get supported flags Date: Fri, 28 Apr 2017 09:02:16 -0400 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1493384538-27883-1-git-send-email-stefanb@linux.vnet.ibm.com> References: <1493384538-27883-1-git-send-email-stefanb@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17042813-8235-0000-0000-00000B6521C1 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006989; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000208; SDB=6.00853581; UDB=6.00422109; IPR=6.00632522; BA=6.00005316; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00015219; XFM=3.00000014; UTC=2017-04-28 13:02:27 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17042813-8236-0000-0000-00003B7F29DD Message-Id: <1493384538-27883-2-git-send-email-stefanb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-04-28_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1704280190 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Add an ioctl to get the supported flags. Signed-off-by: Stefan Berger --- drivers/char/tpm/tpm_vtpm_proxy.c | 29 +++++++++++++++++++++++++++++ include/uapi/linux/vtpm_proxy.h | 11 +++++++++++ 2 files changed, 40 insertions(+) diff --git a/drivers/char/tpm/tpm_vtpm_proxy.c b/drivers/char/tpm/tpm_vtpm_proxy.c index 751059d..fb4d207 100644 --- a/drivers/char/tpm/tpm_vtpm_proxy.c +++ b/drivers/char/tpm/tpm_vtpm_proxy.c @@ -592,6 +592,33 @@ static long vtpmx_ioc_new_dev(struct file *file, unsigned int ioctl, return 0; } +/** + * vtpmx_ioc_get_supt_flags - handler for the %VTPM_PROXY_IOC_GET_SUPT_FLAGS + * ioctl + * @file: /dev/vtpmx + * @ioctl: the ioctl number + * @arg: pointer to the struct vtpmx_proxy_get_supt_flags + * + * Return the bitfield of supported flags + */ +static long vtpmx_ioc_get_supt_flags(struct file *file, unsigned int ioctl, + unsigned long arg) +{ + void __user *argp = (void __user *)arg; + struct vtpm_proxy_supt_flags __user *vtpm_supt_flags_p = argp; + struct vtpm_proxy_supt_flags flags = { + .flags = VTPM_PROXY_FLAGS_ALL, + }; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (copy_to_user(vtpm_supt_flags_p, &flags, sizeof(flags))) + return -EFAULT; + + return 0; +} + /* * vtpmx_fops_ioctl: ioctl on /dev/vtpmx * @@ -604,6 +631,8 @@ static long vtpmx_fops_ioctl(struct file *f, unsigned int ioctl, switch (ioctl) { case VTPM_PROXY_IOC_NEW_DEV: return vtpmx_ioc_new_dev(f, ioctl, arg); + case VTPM_PROXY_IOC_GET_SUPT_FLAGS: + return vtpmx_ioc_get_supt_flags(f, ioctl, arg); default: return -ENOIOCTLCMD; } diff --git a/include/uapi/linux/vtpm_proxy.h b/include/uapi/linux/vtpm_proxy.h index a69e991..83e64e7 100644 --- a/include/uapi/linux/vtpm_proxy.h +++ b/include/uapi/linux/vtpm_proxy.h @@ -44,6 +44,17 @@ struct vtpm_proxy_new_dev { __u32 minor; /* output */ }; +/** + * struct vtpm_proxy_supt_flags - parameter structure for the + * %VTPM_PROXY_IOC_GET_SUPT_FLAGS ioctl + * @flags: flags supported by the vtpm proxy driver + */ +struct vtpm_proxy_supt_flags { + __u32 flags; /* output */ +}; + #define VTPM_PROXY_IOC_NEW_DEV _IOWR(0xa1, 0x00, struct vtpm_proxy_new_dev) +#define VTPM_PROXY_IOC_GET_SUPT_FLAGS \ + _IOR(0xa1, 0x01, struct vtpm_proxy_supt_flags) #endif /* _UAPI_LINUX_VTPM_PROXY_H */