diff options
Diffstat (limited to 'security/selinux/selinuxfs.c')
| -rw-r--r-- | security/selinux/selinuxfs.c | 89 |
1 files changed, 85 insertions, 4 deletions
diff --git a/security/selinux/selinuxfs.c b/security/selinux/selinuxfs.c index 397fd4955fe..a85740530af 100644 --- a/security/selinux/selinuxfs.c +++ b/security/selinux/selinuxfs.c @@ -2,6 +2,11 @@ * * Added conditional policy language extensions * + * Updated: Hewlett-Packard <paul.moore@hp.com> + * + * Added support for the policy capability bitmap + * + * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. * Copyright (C) 2003 - 2004 Tresys Technology, LLC * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> * This program is free software; you can redistribute it and/or modify @@ -35,6 +40,11 @@ #include "objsec.h" #include "conditional.h" +/* Policy capability filenames */ +static char *policycap_names[] = { + "network_peer_controls" +}; + unsigned int selinux_checkreqprot = CONFIG_SECURITY_SELINUX_CHECKREQPROT_VALUE; #ifdef CONFIG_SECURITY_SELINUX_ENABLE_SECMARK_DEFAULT @@ -72,6 +82,9 @@ static int *bool_pending_values = NULL; static struct dentry *class_dir = NULL; static unsigned long last_class_ino; +/* global data for policy capabilities */ +static struct dentry *policycap_dir = NULL; + extern void selnl_notify_setenforce(int val); /* Check whether a task is allowed to use a security operation. */ @@ -111,10 +124,11 @@ enum sel_inos { static unsigned long sel_last_ino = SEL_INO_NEXT - 1; -#define SEL_INITCON_INO_OFFSET 0x01000000 -#define SEL_BOOL_INO_OFFSET 0x02000000 -#define SEL_CLASS_INO_OFFSET 0x04000000 -#define SEL_INO_MASK 0x00ffffff +#define SEL_INITCON_INO_OFFSET 0x01000000 +#define SEL_BOOL_INO_OFFSET 0x02000000 +#define SEL_CLASS_INO_OFFSET 0x04000000 +#define SEL_POLICYCAP_INO_OFFSET 0x08000000 +#define SEL_INO_MASK 0x00ffffff #define TMPBUFLEN 12 static ssize_t sel_read_enforce(struct file *filp, char __user *buf, @@ -263,6 +277,7 @@ static const struct file_operations sel_policyvers_ops = { /* declaration for sel_write_load */ static int sel_make_bools(void); static int sel_make_classes(void); +static int sel_make_policycap(void); /* declaration for sel_make_class_dirs */ static int sel_make_dir(struct inode *dir, struct dentry *dentry, @@ -323,6 +338,12 @@ static ssize_t sel_write_load(struct file * file, const char __user * buf, } ret = sel_make_classes(); + if (ret) { + length = ret; + goto out1; + } + + ret = sel_make_policycap(); if (ret) length = ret; else @@ -1399,6 +1420,24 @@ static const struct file_operations sel_perm_ops = { .read = sel_read_perm, }; +static ssize_t sel_read_policycap(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + int value; + char tmpbuf[TMPBUFLEN]; + ssize_t length; + unsigned long i_ino = file->f_path.dentry->d_inode->i_ino; + + value = security_policycap_supported(i_ino & SEL_INO_MASK); + length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); + + return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); +} + +static const struct file_operations sel_policycap_ops = { + .read = sel_read_policycap, +}; + static int sel_make_perm_files(char *objclass, int classvalue, struct dentry *dir) { @@ -1545,6 +1584,36 @@ out: return rc; } +static int sel_make_policycap(void) +{ + unsigned int iter; + struct dentry *dentry = NULL; + struct inode *inode = NULL; + + sel_remove_entries(policycap_dir); + + for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { + if (iter < ARRAY_SIZE(policycap_names)) + dentry = d_alloc_name(policycap_dir, + policycap_names[iter]); + else + dentry = d_alloc_name(policycap_dir, "unknown"); + + if (dentry == NULL) + return -ENOMEM; + + inode = sel_make_inode(policycap_dir->d_sb, S_IFREG | S_IRUGO); + if (inode == NULL) + return -ENOMEM; + + inode->i_fop = &sel_policycap_ops; + inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; + d_add(dentry, inode); + } + + return 0; +} + static int sel_make_dir(struct inode *dir, struct dentry *dentry, unsigned long *ino) { @@ -1673,6 +1742,18 @@ static int sel_fill_super(struct super_block * sb, void * data, int silent) class_dir = dentry; + dentry = d_alloc_name(sb->s_root, "policy_capabilities"); + if (!dentry) { + ret = -ENOMEM; + goto err; + } + + ret = sel_make_dir(root_inode, dentry, &sel_last_ino); + if (ret) + goto err; + + policycap_dir = dentry; + out: return ret; err: |