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Date: Thu, 9 Apr 2020 11:39:06 +0800 From: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com> To: zohar@...ux.ibm.com, dmitry.kasatkin@...il.com, jmorris@...ei.org, serge@...lyn.com, zhangliguang@...ux.alibaba.com Cc: linux-integrity@...r.kernel.org, linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 1/2] ima: support to read appraise mode Support to read appraise mode in runtime through securityfs file 'integrity/ima/appraise_mode'. Signed-off-by: luanshi <zhangliguang@...ux.alibaba.com> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com> --- security/integrity/ima/ima_fs.c | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c index a71e822a6e92..65384f6ac0d9 100644 --- a/security/integrity/ima/ima_fs.c +++ b/security/integrity/ima/ima_fs.c @@ -360,6 +360,7 @@ static struct dentry *ascii_runtime_measurements; static struct dentry *runtime_measurements_count; static struct dentry *violations; static struct dentry *ima_policy; +static struct dentry *appraise_mode; enum ima_fs_flags { IMA_FS_BUSY, @@ -447,6 +448,29 @@ static const struct file_operations ima_measure_policy_ops = { .llseek = generic_file_llseek, }; +static ssize_t ima_appraise_mode_read(struct file *filp, + char __user *buf, + size_t count, loff_t *ppos) +{ + const char *mode; + + if (ima_appraise & IMA_APPRAISE_ENFORCE) + mode = "enforce"; + else if (ima_appraise & IMA_APPRAISE_FIX) + mode = "fix"; + else if (ima_appraise & IMA_APPRAISE_LOG) + mode = "log"; + else + mode = "off"; + + return simple_read_from_buffer(buf, count, ppos, mode, strlen(mode)); +} + +static const struct file_operations ima_appraise_mode_ops = { + .read = ima_appraise_mode_read, + .llseek = generic_file_llseek, +}; + int __init ima_fs_init(void) { ima_dir = securityfs_create_dir("ima", integrity_dir); @@ -491,14 +515,20 @@ int __init ima_fs_init(void) if (IS_ERR(ima_policy)) goto out; + appraise_mode = + securityfs_create_file("appraise_mode", S_IRUSR | S_IRGRP, + ima_dir, NULL, &ima_appraise_mode_ops); + if (IS_ERR(appraise_mode)) + goto out; + return 0; out: + securityfs_remove(ima_policy); securityfs_remove(violations); securityfs_remove(runtime_measurements_count); securityfs_remove(ascii_runtime_measurements); securityfs_remove(binary_runtime_measurements); securityfs_remove(ima_symlink); securityfs_remove(ima_dir); - securityfs_remove(ima_policy); return -1; } -- 2.17.1
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