11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 582c21bfaSPaul Moore * Updated: Hewlett-Packard <paul@paul-moore.com> 63bb56b25SPaul Moore * 73bb56b25SPaul Moore * Added support for the policy capability bitmap 83bb56b25SPaul Moore * 93bb56b25SPaul Moore * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. 101da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 111da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 131da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation, version 2. 151da177e4SLinus Torvalds */ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/pagemap.h> 191da177e4SLinus Torvalds #include <linux/slab.h> 201da177e4SLinus Torvalds #include <linux/vmalloc.h> 211da177e4SLinus Torvalds #include <linux/fs.h> 220619f0f5SStephen Smalley #include <linux/mount.h> 23bb003079SIngo Molnar #include <linux/mutex.h> 241da177e4SLinus Torvalds #include <linux/init.h> 251da177e4SLinus Torvalds #include <linux/string.h> 261da177e4SLinus Torvalds #include <linux/security.h> 271da177e4SLinus Torvalds #include <linux/major.h> 281da177e4SLinus Torvalds #include <linux/seq_file.h> 291da177e4SLinus Torvalds #include <linux/percpu.h> 30af601e46SSteve Grubb #include <linux/audit.h> 31f5269710SEric Paris #include <linux/uaccess.h> 327a627e3bSGreg Kroah-Hartman #include <linux/kobject.h> 330f7e4c33SKohei Kaigai #include <linux/ctype.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 361da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #include "flask.h" 391da177e4SLinus Torvalds #include "avc.h" 401da177e4SLinus Torvalds #include "avc_ss.h" 411da177e4SLinus Torvalds #include "security.h" 421da177e4SLinus Torvalds #include "objsec.h" 431da177e4SLinus Torvalds #include "conditional.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds enum sel_inos { 461da177e4SLinus Torvalds SEL_ROOT_INO = 2, 471da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 481da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 491da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 501da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 511da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 521da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 531da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 541da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 551da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 561da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 571da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 581da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 591da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 604e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 613f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 623f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 6311904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 64cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 65f9df6458SAndrew Perepechko SEL_VALIDATE_TRANS, /* compute validatetrans decision */ 666174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 671da177e4SLinus Torvalds }; 681da177e4SLinus Torvalds 690619f0f5SStephen Smalley struct selinux_fs_info { 700619f0f5SStephen Smalley struct dentry *bool_dir; 710619f0f5SStephen Smalley unsigned int bool_num; 720619f0f5SStephen Smalley char **bool_pending_names; 730619f0f5SStephen Smalley unsigned int *bool_pending_values; 740619f0f5SStephen Smalley struct dentry *class_dir; 750619f0f5SStephen Smalley unsigned long last_class_ino; 760619f0f5SStephen Smalley bool policy_opened; 770619f0f5SStephen Smalley struct dentry *policycap_dir; 780619f0f5SStephen Smalley struct mutex mutex; 790619f0f5SStephen Smalley unsigned long last_ino; 800619f0f5SStephen Smalley struct selinux_state *state; 810619f0f5SStephen Smalley struct super_block *sb; 820619f0f5SStephen Smalley }; 830619f0f5SStephen Smalley 840619f0f5SStephen Smalley static int selinux_fs_info_create(struct super_block *sb) 850619f0f5SStephen Smalley { 860619f0f5SStephen Smalley struct selinux_fs_info *fsi; 870619f0f5SStephen Smalley 880619f0f5SStephen Smalley fsi = kzalloc(sizeof(*fsi), GFP_KERNEL); 890619f0f5SStephen Smalley if (!fsi) 900619f0f5SStephen Smalley return -ENOMEM; 910619f0f5SStephen Smalley 920619f0f5SStephen Smalley mutex_init(&fsi->mutex); 930619f0f5SStephen Smalley fsi->last_ino = SEL_INO_NEXT - 1; 940619f0f5SStephen Smalley fsi->state = &selinux_state; 950619f0f5SStephen Smalley fsi->sb = sb; 960619f0f5SStephen Smalley sb->s_fs_info = fsi; 970619f0f5SStephen Smalley return 0; 980619f0f5SStephen Smalley } 990619f0f5SStephen Smalley 1000619f0f5SStephen Smalley static void selinux_fs_info_free(struct super_block *sb) 1010619f0f5SStephen Smalley { 1020619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1030619f0f5SStephen Smalley int i; 1040619f0f5SStephen Smalley 1050619f0f5SStephen Smalley if (fsi) { 1060619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 1070619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 1080619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 1090619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 1100619f0f5SStephen Smalley } 1110619f0f5SStephen Smalley kfree(sb->s_fs_info); 1120619f0f5SStephen Smalley sb->s_fs_info = NULL; 1130619f0f5SStephen Smalley } 1146174eafcSJames Carter 115f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 116bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 117e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1183bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 119f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 120f0ee2e46SJames Carter 1211da177e4SLinus Torvalds #define TMPBUFLEN 12 1221da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1231da177e4SLinus Torvalds size_t count, loff_t *ppos) 1241da177e4SLinus Torvalds { 1250619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 1261da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1271da177e4SLinus Torvalds ssize_t length; 1281da177e4SLinus Torvalds 129aa8e712cSStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 1300619f0f5SStephen Smalley enforcing_enabled(fsi->state)); 1311da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1351da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1361da177e4SLinus Torvalds size_t count, loff_t *ppos) 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds { 1390619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1400619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 141b77a493bSEric Paris char *page = NULL; 1421da177e4SLinus Torvalds ssize_t length; 143aa8e712cSStephen Smalley int old_value, new_value; 1441da177e4SLinus Torvalds 145bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1468365a719SAl Viro return -ENOMEM; 147b77a493bSEric Paris 1481da177e4SLinus Torvalds /* No partial writes. */ 149b77a493bSEric Paris if (*ppos != 0) 1508365a719SAl Viro return -EINVAL; 151b77a493bSEric Paris 1528365a719SAl Viro page = memdup_user_nul(buf, count); 1538365a719SAl Viro if (IS_ERR(page)) 1548365a719SAl Viro return PTR_ERR(page); 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds length = -EINVAL; 1571da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1581da177e4SLinus Torvalds goto out; 1591da177e4SLinus Torvalds 160ea49d10eSStephen Smalley new_value = !!new_value; 161ea49d10eSStephen Smalley 1620619f0f5SStephen Smalley old_value = enforcing_enabled(state); 163aa8e712cSStephen Smalley if (new_value != old_value) { 1646b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 1656b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 166be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETENFORCE, 167be0554c9SStephen Smalley NULL); 1681da177e4SLinus Torvalds if (length) 1691da177e4SLinus Torvalds goto out; 170af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 1714746ec5bSEric Paris "enforcing=%d old_enforcing=%d auid=%u ses=%u", 172aa8e712cSStephen Smalley new_value, old_value, 173581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 1744746ec5bSEric Paris audit_get_sessionid(current)); 1750619f0f5SStephen Smalley enforcing_set(state, new_value); 176aa8e712cSStephen Smalley if (new_value) 1776b6bc620SStephen Smalley avc_ss_reset(state->avc, 0); 178aa8e712cSStephen Smalley selnl_notify_setenforce(new_value); 1790619f0f5SStephen Smalley selinux_status_update_setenforce(state, new_value); 180aa8e712cSStephen Smalley if (!new_value) 1818f408ab6SDaniel Jurgens call_lsm_notifier(LSM_POLICY_CHANGE, NULL); 1821da177e4SLinus Torvalds } 1831da177e4SLinus Torvalds length = count; 1841da177e4SLinus Torvalds out: 1858365a719SAl Viro kfree(page); 1861da177e4SLinus Torvalds return length; 1871da177e4SLinus Torvalds } 1881da177e4SLinus Torvalds #else 1891da177e4SLinus Torvalds #define sel_write_enforce NULL 1901da177e4SLinus Torvalds #endif 1911da177e4SLinus Torvalds 1929c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1931da177e4SLinus Torvalds .read = sel_read_enforce, 1941da177e4SLinus Torvalds .write = sel_write_enforce, 19557a62c23SArnd Bergmann .llseek = generic_file_llseek, 1961da177e4SLinus Torvalds }; 1971da177e4SLinus Torvalds 1983f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 1993f12070eSEric Paris size_t count, loff_t *ppos) 2003f12070eSEric Paris { 2010619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 2020619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 2033f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 2043f12070eSEric Paris ssize_t length; 205496ad9aaSAl Viro ino_t ino = file_inode(filp)->i_ino; 2063f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2070619f0f5SStephen Smalley security_get_reject_unknown(state) : 2080619f0f5SStephen Smalley !security_get_allow_unknown(state); 2093f12070eSEric Paris 2103f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2113f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2123f12070eSEric Paris } 2133f12070eSEric Paris 2143f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2153f12070eSEric Paris .read = sel_read_handle_unknown, 21657a62c23SArnd Bergmann .llseek = generic_file_llseek, 2173f12070eSEric Paris }; 2183f12070eSEric Paris 21911904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 22011904167SKaiGai Kohei { 2210619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 2220619f0f5SStephen Smalley struct page *status = selinux_kernel_status_page(fsi->state); 22311904167SKaiGai Kohei 22411904167SKaiGai Kohei if (!status) 22511904167SKaiGai Kohei return -ENOMEM; 22611904167SKaiGai Kohei 22711904167SKaiGai Kohei filp->private_data = status; 22811904167SKaiGai Kohei 22911904167SKaiGai Kohei return 0; 23011904167SKaiGai Kohei } 23111904167SKaiGai Kohei 23211904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 23311904167SKaiGai Kohei size_t count, loff_t *ppos) 23411904167SKaiGai Kohei { 23511904167SKaiGai Kohei struct page *status = filp->private_data; 23611904167SKaiGai Kohei 23711904167SKaiGai Kohei BUG_ON(!status); 23811904167SKaiGai Kohei 23911904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 24011904167SKaiGai Kohei page_address(status), 24111904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 24211904167SKaiGai Kohei } 24311904167SKaiGai Kohei 24411904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 24511904167SKaiGai Kohei struct vm_area_struct *vma) 24611904167SKaiGai Kohei { 24711904167SKaiGai Kohei struct page *status = filp->private_data; 24811904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 24911904167SKaiGai Kohei 25011904167SKaiGai Kohei BUG_ON(!status); 25111904167SKaiGai Kohei 25211904167SKaiGai Kohei /* only allows one page from the head */ 25311904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 25411904167SKaiGai Kohei return -EIO; 25511904167SKaiGai Kohei /* disallow writable mapping */ 25611904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25711904167SKaiGai Kohei return -EPERM; 25811904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 25911904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 26011904167SKaiGai Kohei 26111904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 26211904167SKaiGai Kohei page_to_pfn(status), 26311904167SKaiGai Kohei size, vma->vm_page_prot); 26411904167SKaiGai Kohei } 26511904167SKaiGai Kohei 26611904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26711904167SKaiGai Kohei .open = sel_open_handle_status, 26811904167SKaiGai Kohei .read = sel_read_handle_status, 26911904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 27011904167SKaiGai Kohei .llseek = generic_file_llseek, 27111904167SKaiGai Kohei }; 27211904167SKaiGai Kohei 2731da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2741da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2751da177e4SLinus Torvalds size_t count, loff_t *ppos) 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds { 2780619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 2798365a719SAl Viro char *page; 2801da177e4SLinus Torvalds ssize_t length; 2811da177e4SLinus Torvalds int new_value; 2821da177e4SLinus Torvalds 283bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2848365a719SAl Viro return -ENOMEM; 285b77a493bSEric Paris 2861da177e4SLinus Torvalds /* No partial writes. */ 287b77a493bSEric Paris if (*ppos != 0) 2888365a719SAl Viro return -EINVAL; 289b77a493bSEric Paris 2908365a719SAl Viro page = memdup_user_nul(buf, count); 2918365a719SAl Viro if (IS_ERR(page)) 2928365a719SAl Viro return PTR_ERR(page); 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds length = -EINVAL; 2951da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2961da177e4SLinus Torvalds goto out; 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds if (new_value) { 2990619f0f5SStephen Smalley length = selinux_disable(fsi->state); 300b77a493bSEric Paris if (length) 3011da177e4SLinus Torvalds goto out; 302af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_STATUS, 3034746ec5bSEric Paris "selinux=0 auid=%u ses=%u", 304581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 3054746ec5bSEric Paris audit_get_sessionid(current)); 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds length = count; 3091da177e4SLinus Torvalds out: 3108365a719SAl Viro kfree(page); 3111da177e4SLinus Torvalds return length; 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds #else 3141da177e4SLinus Torvalds #define sel_write_disable NULL 3151da177e4SLinus Torvalds #endif 3161da177e4SLinus Torvalds 3179c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3181da177e4SLinus Torvalds .write = sel_write_disable, 31957a62c23SArnd Bergmann .llseek = generic_file_llseek, 3201da177e4SLinus Torvalds }; 3211da177e4SLinus Torvalds 3221da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3231da177e4SLinus Torvalds size_t count, loff_t *ppos) 3241da177e4SLinus Torvalds { 3251da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3261da177e4SLinus Torvalds ssize_t length; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3291da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3329c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3331da177e4SLinus Torvalds .read = sel_read_policyvers, 33457a62c23SArnd Bergmann .llseek = generic_file_llseek, 3351da177e4SLinus Torvalds }; 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds /* declaration for sel_write_load */ 3380619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi); 3390619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi); 3400619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi); 341e47c8fc5SChristopher J. PeBenito 342e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 343a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 344e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3471da177e4SLinus Torvalds size_t count, loff_t *ppos) 3481da177e4SLinus Torvalds { 3490619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 3501da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3511da177e4SLinus Torvalds ssize_t length; 3521da177e4SLinus Torvalds 3530719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3540619f0f5SStephen Smalley security_mls_enabled(fsi->state)); 3551da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds 3589c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3591da177e4SLinus Torvalds .read = sel_read_mls, 36057a62c23SArnd Bergmann .llseek = generic_file_llseek, 3611da177e4SLinus Torvalds }; 3621da177e4SLinus Torvalds 363cee74f47SEric Paris struct policy_load_memory { 364cee74f47SEric Paris size_t len; 365cee74f47SEric Paris void *data; 366cee74f47SEric Paris }; 367cee74f47SEric Paris 368cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 369cee74f47SEric Paris { 3700619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 3710619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 372cee74f47SEric Paris struct policy_load_memory *plm = NULL; 373cee74f47SEric Paris int rc; 374cee74f47SEric Paris 375cee74f47SEric Paris BUG_ON(filp->private_data); 376cee74f47SEric Paris 3770619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 378cee74f47SEric Paris 3796b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 3806b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 381be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 382cee74f47SEric Paris if (rc) 383cee74f47SEric Paris goto err; 384cee74f47SEric Paris 385cee74f47SEric Paris rc = -EBUSY; 3860619f0f5SStephen Smalley if (fsi->policy_opened) 387cee74f47SEric Paris goto err; 388cee74f47SEric Paris 389cee74f47SEric Paris rc = -ENOMEM; 390cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 391cee74f47SEric Paris if (!plm) 392cee74f47SEric Paris goto err; 393cee74f47SEric Paris 3940619f0f5SStephen Smalley if (i_size_read(inode) != security_policydb_len(state)) { 3955955102cSAl Viro inode_lock(inode); 3960619f0f5SStephen Smalley i_size_write(inode, security_policydb_len(state)); 3975955102cSAl Viro inode_unlock(inode); 398cee74f47SEric Paris } 399cee74f47SEric Paris 4000619f0f5SStephen Smalley rc = security_read_policy(state, &plm->data, &plm->len); 401cee74f47SEric Paris if (rc) 402cee74f47SEric Paris goto err; 403cee74f47SEric Paris 4040619f0f5SStephen Smalley fsi->policy_opened = 1; 405cee74f47SEric Paris 406cee74f47SEric Paris filp->private_data = plm; 407cee74f47SEric Paris 4080619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 409cee74f47SEric Paris 410cee74f47SEric Paris return 0; 411cee74f47SEric Paris err: 4120619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 413cee74f47SEric Paris 414cee74f47SEric Paris if (plm) 415cee74f47SEric Paris vfree(plm->data); 416cee74f47SEric Paris kfree(plm); 417cee74f47SEric Paris return rc; 418cee74f47SEric Paris } 419cee74f47SEric Paris 420cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 421cee74f47SEric Paris { 4220619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 423cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 424cee74f47SEric Paris 425cee74f47SEric Paris BUG_ON(!plm); 426cee74f47SEric Paris 4270619f0f5SStephen Smalley fsi->policy_opened = 0; 428cee74f47SEric Paris 429cee74f47SEric Paris vfree(plm->data); 430cee74f47SEric Paris kfree(plm); 431cee74f47SEric Paris 432cee74f47SEric Paris return 0; 433cee74f47SEric Paris } 434cee74f47SEric Paris 435cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 436cee74f47SEric Paris size_t count, loff_t *ppos) 437cee74f47SEric Paris { 4380619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 439cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 440cee74f47SEric Paris int ret; 441cee74f47SEric Paris 4420619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 443cee74f47SEric Paris 4446b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 4456b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 446be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 447cee74f47SEric Paris if (ret) 448cee74f47SEric Paris goto out; 449cee74f47SEric Paris 450cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 451cee74f47SEric Paris out: 4520619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 453cee74f47SEric Paris return ret; 454cee74f47SEric Paris } 455cee74f47SEric Paris 45611bac800SDave Jiang static int sel_mmap_policy_fault(struct vm_fault *vmf) 457845ca30fSEric Paris { 45811bac800SDave Jiang struct policy_load_memory *plm = vmf->vma->vm_file->private_data; 459845ca30fSEric Paris unsigned long offset; 460845ca30fSEric Paris struct page *page; 461845ca30fSEric Paris 462845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 463845ca30fSEric Paris return VM_FAULT_SIGBUS; 464845ca30fSEric Paris 465845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 466845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 467845ca30fSEric Paris return VM_FAULT_SIGBUS; 468845ca30fSEric Paris 469845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 470845ca30fSEric Paris get_page(page); 471845ca30fSEric Paris 472845ca30fSEric Paris vmf->page = page; 473845ca30fSEric Paris 474845ca30fSEric Paris return 0; 475845ca30fSEric Paris } 476845ca30fSEric Paris 4777cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 478845ca30fSEric Paris .fault = sel_mmap_policy_fault, 479845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 480845ca30fSEric Paris }; 481845ca30fSEric Paris 482ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 483845ca30fSEric Paris { 484845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 485845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 486845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 487845ca30fSEric Paris 488845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 489845ca30fSEric Paris return -EACCES; 490845ca30fSEric Paris } 491845ca30fSEric Paris 492314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 493845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 494845ca30fSEric Paris 495845ca30fSEric Paris return 0; 496845ca30fSEric Paris } 497845ca30fSEric Paris 498cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 499cee74f47SEric Paris .open = sel_open_policy, 500cee74f47SEric Paris .read = sel_read_policy, 501845ca30fSEric Paris .mmap = sel_mmap_policy, 502cee74f47SEric Paris .release = sel_release_policy, 50347a93a5bSEric Paris .llseek = generic_file_llseek, 504cee74f47SEric Paris }; 505cee74f47SEric Paris 5060619f0f5SStephen Smalley static int sel_make_policy_nodes(struct selinux_fs_info *fsi) 5070619f0f5SStephen Smalley { 5080619f0f5SStephen Smalley int ret; 5090619f0f5SStephen Smalley 5100619f0f5SStephen Smalley ret = sel_make_bools(fsi); 5110619f0f5SStephen Smalley if (ret) { 5120619f0f5SStephen Smalley pr_err("SELinux: failed to load policy booleans\n"); 5130619f0f5SStephen Smalley return ret; 5140619f0f5SStephen Smalley } 5150619f0f5SStephen Smalley 5160619f0f5SStephen Smalley ret = sel_make_classes(fsi); 5170619f0f5SStephen Smalley if (ret) { 5180619f0f5SStephen Smalley pr_err("SELinux: failed to load policy classes\n"); 5190619f0f5SStephen Smalley return ret; 5200619f0f5SStephen Smalley } 5210619f0f5SStephen Smalley 5220619f0f5SStephen Smalley ret = sel_make_policycap(fsi); 5230619f0f5SStephen Smalley if (ret) { 5240619f0f5SStephen Smalley pr_err("SELinux: failed to load policy capabilities\n"); 5250619f0f5SStephen Smalley return ret; 5260619f0f5SStephen Smalley } 5270619f0f5SStephen Smalley 5280619f0f5SStephen Smalley return 0; 5290619f0f5SStephen Smalley } 5300619f0f5SStephen Smalley 5311da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5321da177e4SLinus Torvalds size_t count, loff_t *ppos) 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds { 5350619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5361da177e4SLinus Torvalds ssize_t length; 5371da177e4SLinus Torvalds void *data = NULL; 5381da177e4SLinus Torvalds 5390619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 5401da177e4SLinus Torvalds 5416b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5426b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 543be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); 5441da177e4SLinus Torvalds if (length) 5451da177e4SLinus Torvalds goto out; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds /* No partial writes. */ 5481da177e4SLinus Torvalds length = -EINVAL; 549b77a493bSEric Paris if (*ppos != 0) 5501da177e4SLinus Torvalds goto out; 5511da177e4SLinus Torvalds 552b77a493bSEric Paris length = -EFBIG; 553b77a493bSEric Paris if (count > 64 * 1024 * 1024) 5541da177e4SLinus Torvalds goto out; 555b77a493bSEric Paris 556b77a493bSEric Paris length = -ENOMEM; 557b77a493bSEric Paris data = vmalloc(count); 558b77a493bSEric Paris if (!data) 559b77a493bSEric Paris goto out; 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds length = -EFAULT; 5621da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5631da177e4SLinus Torvalds goto out; 5641da177e4SLinus Torvalds 5650619f0f5SStephen Smalley length = security_load_policy(fsi->state, data, count); 5664262fb51SGary Tierney if (length) { 5674262fb51SGary Tierney pr_warn_ratelimited("SELinux: failed to load policy\n"); 5681da177e4SLinus Torvalds goto out; 5694262fb51SGary Tierney } 5701da177e4SLinus Torvalds 5710619f0f5SStephen Smalley length = sel_make_policy_nodes(fsi); 5720619f0f5SStephen Smalley if (length) 573e47c8fc5SChristopher J. PeBenito goto out1; 574b77a493bSEric Paris 5751da177e4SLinus Torvalds length = count; 576e47c8fc5SChristopher J. PeBenito 577e47c8fc5SChristopher J. PeBenito out1: 578af601e46SSteve Grubb audit_log(current->audit_context, GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 5794746ec5bSEric Paris "policy loaded auid=%u ses=%u", 580581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5814746ec5bSEric Paris audit_get_sessionid(current)); 5821da177e4SLinus Torvalds out: 5830619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 5841da177e4SLinus Torvalds vfree(data); 5851da177e4SLinus Torvalds return length; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds 5889c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5891da177e4SLinus Torvalds .write = sel_write_load, 59057a62c23SArnd Bergmann .llseek = generic_file_llseek, 5911da177e4SLinus Torvalds }; 5921da177e4SLinus Torvalds 593ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5941da177e4SLinus Torvalds { 5950619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5960619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 597b77a493bSEric Paris char *canon = NULL; 598ce9982d0SStephen Smalley u32 sid, len; 5991da177e4SLinus Torvalds ssize_t length; 6001da177e4SLinus Torvalds 6016b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6026b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 603be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); 6041da177e4SLinus Torvalds if (length) 605b77a493bSEric Paris goto out; 6061da177e4SLinus Torvalds 6070619f0f5SStephen Smalley length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); 608b77a493bSEric Paris if (length) 609b77a493bSEric Paris goto out; 6101da177e4SLinus Torvalds 6110619f0f5SStephen Smalley length = security_sid_to_context(state, sid, &canon, &len); 612b77a493bSEric Paris if (length) 613b77a493bSEric Paris goto out; 614ce9982d0SStephen Smalley 615b77a493bSEric Paris length = -ERANGE; 616ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 617744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 618744ba35eSEric Paris "payload max\n", __func__, len); 619ce9982d0SStephen Smalley goto out; 620ce9982d0SStephen Smalley } 621ce9982d0SStephen Smalley 622ce9982d0SStephen Smalley memcpy(buf, canon, len); 623ce9982d0SStephen Smalley length = len; 6241da177e4SLinus Torvalds out: 625ce9982d0SStephen Smalley kfree(canon); 6261da177e4SLinus Torvalds return length; 6271da177e4SLinus Torvalds } 6281da177e4SLinus Torvalds 6291da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6301da177e4SLinus Torvalds size_t count, loff_t *ppos) 6311da177e4SLinus Torvalds { 6320619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 6331da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6341da177e4SLinus Torvalds ssize_t length; 6351da177e4SLinus Torvalds 6360619f0f5SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); 6371da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6381da177e4SLinus Torvalds } 6391da177e4SLinus Torvalds 6401da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6411da177e4SLinus Torvalds size_t count, loff_t *ppos) 6421da177e4SLinus Torvalds { 6430619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6448365a719SAl Viro char *page; 6451da177e4SLinus Torvalds ssize_t length; 6461da177e4SLinus Torvalds unsigned int new_value; 6471da177e4SLinus Torvalds 6486b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6496b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 650be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, 651be0554c9SStephen Smalley NULL); 6521da177e4SLinus Torvalds if (length) 6538365a719SAl Viro return length; 6541da177e4SLinus Torvalds 655bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6568365a719SAl Viro return -ENOMEM; 657b77a493bSEric Paris 6581da177e4SLinus Torvalds /* No partial writes. */ 659b77a493bSEric Paris if (*ppos != 0) 6608365a719SAl Viro return -EINVAL; 661b77a493bSEric Paris 6628365a719SAl Viro page = memdup_user_nul(buf, count); 6638365a719SAl Viro if (IS_ERR(page)) 6648365a719SAl Viro return PTR_ERR(page); 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds length = -EINVAL; 6671da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6681da177e4SLinus Torvalds goto out; 6691da177e4SLinus Torvalds 6700619f0f5SStephen Smalley fsi->state->checkreqprot = new_value ? 1 : 0; 6711da177e4SLinus Torvalds length = count; 6721da177e4SLinus Torvalds out: 6738365a719SAl Viro kfree(page); 6741da177e4SLinus Torvalds return length; 6751da177e4SLinus Torvalds } 6769c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6771da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6781da177e4SLinus Torvalds .write = sel_write_checkreqprot, 67957a62c23SArnd Bergmann .llseek = generic_file_llseek, 6801da177e4SLinus Torvalds }; 6811da177e4SLinus Torvalds 682f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 683f9df6458SAndrew Perepechko const char __user *buf, 684f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 685f9df6458SAndrew Perepechko { 6860619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6870619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 688f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 689f9df6458SAndrew Perepechko char *req = NULL; 690f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 691f9df6458SAndrew Perepechko u16 tclass; 692f9df6458SAndrew Perepechko int rc; 693f9df6458SAndrew Perepechko 6946b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 6956b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 696be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); 697f9df6458SAndrew Perepechko if (rc) 698f9df6458SAndrew Perepechko goto out; 699f9df6458SAndrew Perepechko 700f9df6458SAndrew Perepechko rc = -ENOMEM; 701f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 702f9df6458SAndrew Perepechko goto out; 703f9df6458SAndrew Perepechko 704f9df6458SAndrew Perepechko /* No partial writes. */ 705f9df6458SAndrew Perepechko rc = -EINVAL; 706f9df6458SAndrew Perepechko if (*ppos != 0) 707f9df6458SAndrew Perepechko goto out; 708f9df6458SAndrew Perepechko 7090b884d25SAl Viro req = memdup_user_nul(buf, count); 7100b884d25SAl Viro if (IS_ERR(req)) { 7110b884d25SAl Viro rc = PTR_ERR(req); 7120b884d25SAl Viro req = NULL; 713f9df6458SAndrew Perepechko goto out; 7140b884d25SAl Viro } 715f9df6458SAndrew Perepechko 716f9df6458SAndrew Perepechko rc = -ENOMEM; 717f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 718f9df6458SAndrew Perepechko if (!oldcon) 719f9df6458SAndrew Perepechko goto out; 720f9df6458SAndrew Perepechko 721f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 722f9df6458SAndrew Perepechko if (!newcon) 723f9df6458SAndrew Perepechko goto out; 724f9df6458SAndrew Perepechko 725f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 726f9df6458SAndrew Perepechko if (!taskcon) 727f9df6458SAndrew Perepechko goto out; 728f9df6458SAndrew Perepechko 729f9df6458SAndrew Perepechko rc = -EINVAL; 730f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 731f9df6458SAndrew Perepechko goto out; 732f9df6458SAndrew Perepechko 7330619f0f5SStephen Smalley rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); 734f9df6458SAndrew Perepechko if (rc) 735f9df6458SAndrew Perepechko goto out; 736f9df6458SAndrew Perepechko 7370619f0f5SStephen Smalley rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); 738f9df6458SAndrew Perepechko if (rc) 739f9df6458SAndrew Perepechko goto out; 740f9df6458SAndrew Perepechko 7410619f0f5SStephen Smalley rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); 742f9df6458SAndrew Perepechko if (rc) 743f9df6458SAndrew Perepechko goto out; 744f9df6458SAndrew Perepechko 7450619f0f5SStephen Smalley rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); 746f9df6458SAndrew Perepechko if (!rc) 747f9df6458SAndrew Perepechko rc = count; 748f9df6458SAndrew Perepechko out: 749f9df6458SAndrew Perepechko kfree(req); 750f9df6458SAndrew Perepechko kfree(oldcon); 751f9df6458SAndrew Perepechko kfree(newcon); 752f9df6458SAndrew Perepechko kfree(taskcon); 753f9df6458SAndrew Perepechko return rc; 754f9df6458SAndrew Perepechko } 755f9df6458SAndrew Perepechko 756f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 757f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 758f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 759f9df6458SAndrew Perepechko }; 760f9df6458SAndrew Perepechko 7611da177e4SLinus Torvalds /* 7621da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7631da177e4SLinus Torvalds */ 7641da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7651da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7661da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7671da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7681da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds static ssize_t (*write_op[])(struct file *, char *, size_t) = { 7711da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7721da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7731da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7741da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7751da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 776ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7771da177e4SLinus Torvalds }; 7781da177e4SLinus Torvalds 7791da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7801da177e4SLinus Torvalds { 781496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7821da177e4SLinus Torvalds char *data; 7831da177e4SLinus Torvalds ssize_t rv; 7841da177e4SLinus Torvalds 7856e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7861da177e4SLinus Torvalds return -EINVAL; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7891da177e4SLinus Torvalds if (IS_ERR(data)) 7901da177e4SLinus Torvalds return PTR_ERR(data); 7911da177e4SLinus Torvalds 7921da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 7931da177e4SLinus Torvalds if (rv > 0) { 7941da177e4SLinus Torvalds simple_transaction_set(file, rv); 7951da177e4SLinus Torvalds rv = size; 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds return rv; 7981da177e4SLinus Torvalds } 7991da177e4SLinus Torvalds 8009c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 8011da177e4SLinus Torvalds .write = selinux_transaction_write, 8021da177e4SLinus Torvalds .read = simple_transaction_read, 8031da177e4SLinus Torvalds .release = simple_transaction_release, 80457a62c23SArnd Bergmann .llseek = generic_file_llseek, 8051da177e4SLinus Torvalds }; 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds /* 8081da177e4SLinus Torvalds * payload - write methods 8091da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 8101da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 8111da177e4SLinus Torvalds */ 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 8141da177e4SLinus Torvalds { 8150619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8160619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 817b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8181da177e4SLinus Torvalds u32 ssid, tsid; 8191da177e4SLinus Torvalds u16 tclass; 8201da177e4SLinus Torvalds struct av_decision avd; 8211da177e4SLinus Torvalds ssize_t length; 8221da177e4SLinus Torvalds 8236b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8246b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 825be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); 8261da177e4SLinus Torvalds if (length) 827b77a493bSEric Paris goto out; 8281da177e4SLinus Torvalds 8291da177e4SLinus Torvalds length = -ENOMEM; 83089d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8311da177e4SLinus Torvalds if (!scon) 832b77a493bSEric Paris goto out; 8331da177e4SLinus Torvalds 834b77a493bSEric Paris length = -ENOMEM; 83589d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8361da177e4SLinus Torvalds if (!tcon) 8371da177e4SLinus Torvalds goto out; 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds length = -EINVAL; 84019439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 841b77a493bSEric Paris goto out; 8421da177e4SLinus Torvalds 8430619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 844b77a493bSEric Paris if (length) 845b77a493bSEric Paris goto out; 846b77a493bSEric Paris 8470619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 848b77a493bSEric Paris if (length) 849b77a493bSEric Paris goto out; 8501da177e4SLinus Torvalds 8510619f0f5SStephen Smalley security_compute_av_user(state, ssid, tsid, tclass, &avd); 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8548a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 855f1c6381aSEric Paris avd.allowed, 0xffffffff, 8561da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8578a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8581da177e4SLinus Torvalds out: 859b77a493bSEric Paris kfree(tcon); 8601da177e4SLinus Torvalds kfree(scon); 8611da177e4SLinus Torvalds return length; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds 8641da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8651da177e4SLinus Torvalds { 8660619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8670619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 868b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 869f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8701da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8711da177e4SLinus Torvalds u16 tclass; 8721da177e4SLinus Torvalds ssize_t length; 873b77a493bSEric Paris char *newcon = NULL; 8741da177e4SLinus Torvalds u32 len; 875f50a3ec9SKohei Kaigai int nargs; 8761da177e4SLinus Torvalds 8776b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8786b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 879be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, 880be0554c9SStephen Smalley NULL); 8811da177e4SLinus Torvalds if (length) 882b77a493bSEric Paris goto out; 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds length = -ENOMEM; 88589d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8861da177e4SLinus Torvalds if (!scon) 887b77a493bSEric Paris goto out; 8881da177e4SLinus Torvalds 889b77a493bSEric Paris length = -ENOMEM; 89089d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8911da177e4SLinus Torvalds if (!tcon) 8921da177e4SLinus Torvalds goto out; 8931da177e4SLinus Torvalds 894f50a3ec9SKohei Kaigai length = -ENOMEM; 895f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 896f50a3ec9SKohei Kaigai if (!namebuf) 897b77a493bSEric Paris goto out; 8981da177e4SLinus Torvalds 899f50a3ec9SKohei Kaigai length = -EINVAL; 900f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 901f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 902f50a3ec9SKohei Kaigai goto out; 9030f7e4c33SKohei Kaigai if (nargs == 4) { 9040f7e4c33SKohei Kaigai /* 9050f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 9060f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 9070f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 9080f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 9090f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 9100f7e4c33SKohei Kaigai */ 9110f7e4c33SKohei Kaigai char *r, *w; 9120f7e4c33SKohei Kaigai int c1, c2; 9130f7e4c33SKohei Kaigai 9140f7e4c33SKohei Kaigai r = w = namebuf; 9150f7e4c33SKohei Kaigai do { 9160f7e4c33SKohei Kaigai c1 = *r++; 9170f7e4c33SKohei Kaigai if (c1 == '+') 9180f7e4c33SKohei Kaigai c1 = ' '; 9190f7e4c33SKohei Kaigai else if (c1 == '%') { 920af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 921af7ff2c2SAndy Shevchenko if (c1 < 0) 9220f7e4c33SKohei Kaigai goto out; 923af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 924af7ff2c2SAndy Shevchenko if (c2 < 0) 9250f7e4c33SKohei Kaigai goto out; 9260f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 9270f7e4c33SKohei Kaigai } 9280f7e4c33SKohei Kaigai *w++ = c1; 9290f7e4c33SKohei Kaigai } while (c1 != '\0'); 9300f7e4c33SKohei Kaigai 931f50a3ec9SKohei Kaigai objname = namebuf; 9320f7e4c33SKohei Kaigai } 933f50a3ec9SKohei Kaigai 9340619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 935b77a493bSEric Paris if (length) 936b77a493bSEric Paris goto out; 937b77a493bSEric Paris 9380619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 939b77a493bSEric Paris if (length) 940b77a493bSEric Paris goto out; 9411da177e4SLinus Torvalds 9420619f0f5SStephen Smalley length = security_transition_sid_user(state, ssid, tsid, tclass, 9430619f0f5SStephen Smalley objname, &newsid); 944b77a493bSEric Paris if (length) 945b77a493bSEric Paris goto out; 9461da177e4SLinus Torvalds 9470619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 948b77a493bSEric Paris if (length) 949b77a493bSEric Paris goto out; 9501da177e4SLinus Torvalds 951b77a493bSEric Paris length = -ERANGE; 9521da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 953744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 954744ba35eSEric Paris "payload max\n", __func__, len); 955b77a493bSEric Paris goto out; 9561da177e4SLinus Torvalds } 9571da177e4SLinus Torvalds 9581da177e4SLinus Torvalds memcpy(buf, newcon, len); 9591da177e4SLinus Torvalds length = len; 9601da177e4SLinus Torvalds out: 961b77a493bSEric Paris kfree(newcon); 962f50a3ec9SKohei Kaigai kfree(namebuf); 963b77a493bSEric Paris kfree(tcon); 9641da177e4SLinus Torvalds kfree(scon); 9651da177e4SLinus Torvalds return length; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9691da177e4SLinus Torvalds { 9700619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 9710619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 972b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9731da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9741da177e4SLinus Torvalds u16 tclass; 9751da177e4SLinus Torvalds ssize_t length; 976b77a493bSEric Paris char *newcon = NULL; 9771da177e4SLinus Torvalds u32 len; 9781da177e4SLinus Torvalds 9796b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 9806b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 981be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, 982be0554c9SStephen Smalley NULL); 9831da177e4SLinus Torvalds if (length) 984b77a493bSEric Paris goto out; 9851da177e4SLinus Torvalds 9861da177e4SLinus Torvalds length = -ENOMEM; 98789d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9881da177e4SLinus Torvalds if (!scon) 989b77a493bSEric Paris goto out; 9901da177e4SLinus Torvalds 991b77a493bSEric Paris length = -ENOMEM; 99289d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9931da177e4SLinus Torvalds if (!tcon) 9941da177e4SLinus Torvalds goto out; 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds length = -EINVAL; 9971da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 998b77a493bSEric Paris goto out; 9991da177e4SLinus Torvalds 10000619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1001b77a493bSEric Paris if (length) 1002b77a493bSEric Paris goto out; 1003b77a493bSEric Paris 10040619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1005b77a493bSEric Paris if (length) 1006b77a493bSEric Paris goto out; 10071da177e4SLinus Torvalds 10080619f0f5SStephen Smalley length = security_change_sid(state, ssid, tsid, tclass, &newsid); 1009b77a493bSEric Paris if (length) 1010b77a493bSEric Paris goto out; 10111da177e4SLinus Torvalds 10120619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1013b77a493bSEric Paris if (length) 1014b77a493bSEric Paris goto out; 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds length = -ERANGE; 1017b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 1018b77a493bSEric Paris goto out; 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds memcpy(buf, newcon, len); 10211da177e4SLinus Torvalds length = len; 10221da177e4SLinus Torvalds out: 1023b77a493bSEric Paris kfree(newcon); 1024b77a493bSEric Paris kfree(tcon); 10251da177e4SLinus Torvalds kfree(scon); 10261da177e4SLinus Torvalds return length; 10271da177e4SLinus Torvalds } 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 10301da177e4SLinus Torvalds { 10310619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10320619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1033b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 1034b77a493bSEric Paris u32 sid, *sids = NULL; 10351da177e4SLinus Torvalds ssize_t length; 10361da177e4SLinus Torvalds char *newcon; 10371da177e4SLinus Torvalds int i, rc; 10381da177e4SLinus Torvalds u32 len, nsids; 10391da177e4SLinus Torvalds 10406b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 10416b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1042be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_USER, 1043be0554c9SStephen Smalley NULL); 10441da177e4SLinus Torvalds if (length) 10456eab04a8SJustin P. Mattock goto out; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds length = -ENOMEM; 104889d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 10491da177e4SLinus Torvalds if (!con) 10506eab04a8SJustin P. Mattock goto out; 10511da177e4SLinus Torvalds 1052b77a493bSEric Paris length = -ENOMEM; 105389d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 10541da177e4SLinus Torvalds if (!user) 10551da177e4SLinus Torvalds goto out; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds length = -EINVAL; 10581da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 1059b77a493bSEric Paris goto out; 10601da177e4SLinus Torvalds 10610619f0f5SStephen Smalley length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); 1062b77a493bSEric Paris if (length) 1063b77a493bSEric Paris goto out; 10641da177e4SLinus Torvalds 10650619f0f5SStephen Smalley length = security_get_user_sids(state, sid, user, &sids, &nsids); 1066b77a493bSEric Paris if (length) 1067b77a493bSEric Paris goto out; 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10701da177e4SLinus Torvalds ptr = buf + length; 10711da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10720619f0f5SStephen Smalley rc = security_sid_to_context(state, sids[i], &newcon, &len); 10731da177e4SLinus Torvalds if (rc) { 10741da177e4SLinus Torvalds length = rc; 1075b77a493bSEric Paris goto out; 10761da177e4SLinus Torvalds } 10771da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10781da177e4SLinus Torvalds kfree(newcon); 10791da177e4SLinus Torvalds length = -ERANGE; 1080b77a493bSEric Paris goto out; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10831da177e4SLinus Torvalds kfree(newcon); 10841da177e4SLinus Torvalds ptr += len; 10851da177e4SLinus Torvalds length += len; 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds out: 1088b77a493bSEric Paris kfree(sids); 1089b77a493bSEric Paris kfree(user); 10901da177e4SLinus Torvalds kfree(con); 10911da177e4SLinus Torvalds return length; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 10951da177e4SLinus Torvalds { 10960619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10970619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1098b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 10991da177e4SLinus Torvalds u32 ssid, tsid, newsid; 11001da177e4SLinus Torvalds u16 tclass; 11011da177e4SLinus Torvalds ssize_t length; 1102b77a493bSEric Paris char *newcon = NULL; 11031da177e4SLinus Torvalds u32 len; 11041da177e4SLinus Torvalds 11056b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 11066b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1107be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, 1108be0554c9SStephen Smalley NULL); 11091da177e4SLinus Torvalds if (length) 1110b77a493bSEric Paris goto out; 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds length = -ENOMEM; 111389d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 11141da177e4SLinus Torvalds if (!scon) 11156eab04a8SJustin P. Mattock goto out; 11161da177e4SLinus Torvalds 1117b77a493bSEric Paris length = -ENOMEM; 111889d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 11191da177e4SLinus Torvalds if (!tcon) 11201da177e4SLinus Torvalds goto out; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds length = -EINVAL; 11231da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1124b77a493bSEric Paris goto out; 11251da177e4SLinus Torvalds 11260619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1127b77a493bSEric Paris if (length) 1128b77a493bSEric Paris goto out; 1129b77a493bSEric Paris 11300619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1131b77a493bSEric Paris if (length) 1132b77a493bSEric Paris goto out; 11331da177e4SLinus Torvalds 11340619f0f5SStephen Smalley length = security_member_sid(state, ssid, tsid, tclass, &newsid); 1135b77a493bSEric Paris if (length) 1136b77a493bSEric Paris goto out; 11371da177e4SLinus Torvalds 11380619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1139b77a493bSEric Paris if (length) 1140b77a493bSEric Paris goto out; 11411da177e4SLinus Torvalds 1142b77a493bSEric Paris length = -ERANGE; 11431da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1144744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: context size (%u) exceeds " 1145744ba35eSEric Paris "payload max\n", __func__, len); 1146b77a493bSEric Paris goto out; 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds memcpy(buf, newcon, len); 11501da177e4SLinus Torvalds length = len; 11511da177e4SLinus Torvalds out: 1152b77a493bSEric Paris kfree(newcon); 1153b77a493bSEric Paris kfree(tcon); 11541da177e4SLinus Torvalds kfree(scon); 11551da177e4SLinus Torvalds return length; 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 11611da177e4SLinus Torvalds 11621da177e4SLinus Torvalds if (ret) { 11631da177e4SLinus Torvalds ret->i_mode = mode; 1164078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 11651da177e4SLinus Torvalds } 11661da177e4SLinus Torvalds return ret; 11671da177e4SLinus Torvalds } 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 11701da177e4SLinus Torvalds size_t count, loff_t *ppos) 11711da177e4SLinus Torvalds { 11720619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 11731da177e4SLinus Torvalds char *page = NULL; 11741da177e4SLinus Torvalds ssize_t length; 11751da177e4SLinus Torvalds ssize_t ret; 11761da177e4SLinus Torvalds int cur_enforcing; 1177496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1178d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11791da177e4SLinus Torvalds 11800619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 11811da177e4SLinus Torvalds 1182d313f948SStephen Smalley ret = -EINVAL; 11830619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 11840619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1185d313f948SStephen Smalley goto out; 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds ret = -ENOMEM; 1188b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1189b77a493bSEric Paris if (!page) 11901da177e4SLinus Torvalds goto out; 11911da177e4SLinus Torvalds 11920619f0f5SStephen Smalley cur_enforcing = security_get_bool_value(fsi->state, index); 11931da177e4SLinus Torvalds if (cur_enforcing < 0) { 11941da177e4SLinus Torvalds ret = cur_enforcing; 11951da177e4SLinus Torvalds goto out; 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 11980619f0f5SStephen Smalley fsi->bool_pending_values[index]); 119968bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 12001da177e4SLinus Torvalds out: 12010619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12021da177e4SLinus Torvalds free_page((unsigned long)page); 12031da177e4SLinus Torvalds return ret; 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 12071da177e4SLinus Torvalds size_t count, loff_t *ppos) 12081da177e4SLinus Torvalds { 12090619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12101da177e4SLinus Torvalds char *page = NULL; 1211d313f948SStephen Smalley ssize_t length; 12121da177e4SLinus Torvalds int new_value; 1213496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1214d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 12151da177e4SLinus Torvalds 12160619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12171da177e4SLinus Torvalds 12186b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12196b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1220be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1221be0554c9SStephen Smalley NULL); 12221da177e4SLinus Torvalds if (length) 12231da177e4SLinus Torvalds goto out; 12241da177e4SLinus Torvalds 1225d313f948SStephen Smalley length = -EINVAL; 12260619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 12270619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1228d313f948SStephen Smalley goto out; 1229d313f948SStephen Smalley 12301da177e4SLinus Torvalds length = -ENOMEM; 1231b77a493bSEric Paris if (count >= PAGE_SIZE) 12321da177e4SLinus Torvalds goto out; 1233d313f948SStephen Smalley 12341da177e4SLinus Torvalds /* No partial writes. */ 1235d313f948SStephen Smalley length = -EINVAL; 1236b77a493bSEric Paris if (*ppos != 0) 12371da177e4SLinus Torvalds goto out; 1238b77a493bSEric Paris 12398365a719SAl Viro page = memdup_user_nul(buf, count); 12408365a719SAl Viro if (IS_ERR(page)) { 12418365a719SAl Viro length = PTR_ERR(page); 12428365a719SAl Viro page = NULL; 12431da177e4SLinus Torvalds goto out; 12448365a719SAl Viro } 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds length = -EINVAL; 12471da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12481da177e4SLinus Torvalds goto out; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds if (new_value) 12511da177e4SLinus Torvalds new_value = 1; 12521da177e4SLinus Torvalds 12530619f0f5SStephen Smalley fsi->bool_pending_values[index] = new_value; 12541da177e4SLinus Torvalds length = count; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds out: 12570619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12588365a719SAl Viro kfree(page); 12591da177e4SLinus Torvalds return length; 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 12629c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 12631da177e4SLinus Torvalds .read = sel_read_bool, 12641da177e4SLinus Torvalds .write = sel_write_bool, 126557a62c23SArnd Bergmann .llseek = generic_file_llseek, 12661da177e4SLinus Torvalds }; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 12691da177e4SLinus Torvalds const char __user *buf, 12701da177e4SLinus Torvalds size_t count, loff_t *ppos) 12711da177e4SLinus Torvalds { 12720619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12731da177e4SLinus Torvalds char *page = NULL; 1274d313f948SStephen Smalley ssize_t length; 12751da177e4SLinus Torvalds int new_value; 12761da177e4SLinus Torvalds 12770619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12781da177e4SLinus Torvalds 12796b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12806b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1281be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1282be0554c9SStephen Smalley NULL); 12831da177e4SLinus Torvalds if (length) 12841da177e4SLinus Torvalds goto out; 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds length = -ENOMEM; 1287b77a493bSEric Paris if (count >= PAGE_SIZE) 12881da177e4SLinus Torvalds goto out; 1289b77a493bSEric Paris 12901da177e4SLinus Torvalds /* No partial writes. */ 1291b77a493bSEric Paris length = -EINVAL; 1292b77a493bSEric Paris if (*ppos != 0) 12931da177e4SLinus Torvalds goto out; 1294b77a493bSEric Paris 12958365a719SAl Viro page = memdup_user_nul(buf, count); 12968365a719SAl Viro if (IS_ERR(page)) { 12978365a719SAl Viro length = PTR_ERR(page); 12988365a719SAl Viro page = NULL; 12991da177e4SLinus Torvalds goto out; 13008365a719SAl Viro } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds length = -EINVAL; 13031da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 13041da177e4SLinus Torvalds goto out; 13051da177e4SLinus Torvalds 1306b77a493bSEric Paris length = 0; 13070619f0f5SStephen Smalley if (new_value && fsi->bool_pending_values) 13080619f0f5SStephen Smalley length = security_set_bools(fsi->state, fsi->bool_num, 13090619f0f5SStephen Smalley fsi->bool_pending_values); 13101da177e4SLinus Torvalds 1311b77a493bSEric Paris if (!length) 13121da177e4SLinus Torvalds length = count; 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds out: 13150619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 13168365a719SAl Viro kfree(page); 13171da177e4SLinus Torvalds return length; 13181da177e4SLinus Torvalds } 13191da177e4SLinus Torvalds 13209c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 13211da177e4SLinus Torvalds .write = sel_commit_bools_write, 132257a62c23SArnd Bergmann .llseek = generic_file_llseek, 13231da177e4SLinus Torvalds }; 13241da177e4SLinus Torvalds 13250c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 13261da177e4SLinus Torvalds { 1327ad52184bSAl Viro d_genocide(de); 1328ad52184bSAl Viro shrink_dcache_parent(de); 13291da177e4SLinus Torvalds } 13301da177e4SLinus Torvalds 13311da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 13321da177e4SLinus Torvalds 13330619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi) 13341da177e4SLinus Torvalds { 1335b77a493bSEric Paris int i, ret; 13361da177e4SLinus Torvalds ssize_t len; 13371da177e4SLinus Torvalds struct dentry *dentry = NULL; 13380619f0f5SStephen Smalley struct dentry *dir = fsi->bool_dir; 13391da177e4SLinus Torvalds struct inode *inode = NULL; 13401da177e4SLinus Torvalds struct inode_security_struct *isec; 13411da177e4SLinus Torvalds char **names = NULL, *page; 13421da177e4SLinus Torvalds int num; 13431da177e4SLinus Torvalds int *values = NULL; 13441da177e4SLinus Torvalds u32 sid; 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds /* remove any existing files */ 13470619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 13480619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 13490619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 13500619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 13510619f0f5SStephen Smalley fsi->bool_num = 0; 13520619f0f5SStephen Smalley fsi->bool_pending_names = NULL; 13530619f0f5SStephen Smalley fsi->bool_pending_values = NULL; 13541da177e4SLinus Torvalds 13550c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 13561da177e4SLinus Torvalds 1357b77a493bSEric Paris ret = -ENOMEM; 13581872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 13591872981bSEric Paris if (!page) 1360b77a493bSEric Paris goto out; 13611da177e4SLinus Torvalds 13620619f0f5SStephen Smalley ret = security_get_bools(fsi->state, &num, &names, &values); 1363b77a493bSEric Paris if (ret) 13641da177e4SLinus Torvalds goto out; 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1367b77a493bSEric Paris ret = -ENOMEM; 13681da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1369b77a493bSEric Paris if (!dentry) 1370b77a493bSEric Paris goto out; 13711da177e4SLinus Torvalds 1372b77a493bSEric Paris ret = -ENOMEM; 1373b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 1374b77a493bSEric Paris if (!inode) 1375b77a493bSEric Paris goto out; 1376b77a493bSEric Paris 13771da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1378cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 1379b77a493bSEric Paris if (len >= PAGE_SIZE) 1380b77a493bSEric Paris goto out; 1381b77a493bSEric Paris 13821da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 13830619f0f5SStephen Smalley ret = security_genfs_sid(fsi->state, "selinuxfs", page, 1384aa8e712cSStephen Smalley SECCLASS_FILE, &sid); 13854262fb51SGary Tierney if (ret) { 1386900fde06SGary Tierney pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", 1387900fde06SGary Tierney page); 1388900fde06SGary Tierney sid = SECINITSID_SECURITY; 13894262fb51SGary Tierney } 13904262fb51SGary Tierney 13911da177e4SLinus Torvalds isec->sid = sid; 139242059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 13931da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1394bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 13951da177e4SLinus Torvalds d_add(dentry, inode); 13961da177e4SLinus Torvalds } 13970619f0f5SStephen Smalley fsi->bool_num = num; 13980619f0f5SStephen Smalley fsi->bool_pending_names = names; 13990619f0f5SStephen Smalley fsi->bool_pending_values = values; 1400b77a493bSEric Paris 1401b77a493bSEric Paris free_page((unsigned long)page); 1402b77a493bSEric Paris return 0; 14031da177e4SLinus Torvalds out: 14041da177e4SLinus Torvalds free_page((unsigned long)page); 1405b77a493bSEric Paris 14061da177e4SLinus Torvalds if (names) { 14079a5f04bfSJesper Juhl for (i = 0; i < num; i++) 14081da177e4SLinus Torvalds kfree(names[i]); 14091da177e4SLinus Torvalds kfree(names); 14101da177e4SLinus Torvalds } 141120c19e41SDavi Arnaut kfree(values); 14120c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1413b77a493bSEric Paris 1414b77a493bSEric Paris return ret; 14151da177e4SLinus Torvalds } 14161da177e4SLinus Torvalds 14171da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 14181da177e4SLinus Torvalds size_t count, loff_t *ppos) 14191da177e4SLinus Torvalds { 14206b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14216b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14221da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 14231da177e4SLinus Torvalds ssize_t length; 14241da177e4SLinus Torvalds 14256b6bc620SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 14266b6bc620SStephen Smalley avc_get_cache_threshold(state->avc)); 14271da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 14281da177e4SLinus Torvalds } 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 14311da177e4SLinus Torvalds const char __user *buf, 14321da177e4SLinus Torvalds size_t count, loff_t *ppos) 14331da177e4SLinus Torvalds 14341da177e4SLinus Torvalds { 14356b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 14366b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14378365a719SAl Viro char *page; 14381da177e4SLinus Torvalds ssize_t ret; 1439309c5fadSHeinrich Schuchardt unsigned int new_value; 14401da177e4SLinus Torvalds 14416b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 14426b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1443be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETSECPARAM, 1444be0554c9SStephen Smalley NULL); 14451da177e4SLinus Torvalds if (ret) 14468365a719SAl Viro return ret; 1447b77a493bSEric Paris 1448b77a493bSEric Paris if (count >= PAGE_SIZE) 14498365a719SAl Viro return -ENOMEM; 1450b77a493bSEric Paris 1451b77a493bSEric Paris /* No partial writes. */ 1452b77a493bSEric Paris if (*ppos != 0) 14538365a719SAl Viro return -EINVAL; 1454b77a493bSEric Paris 14558365a719SAl Viro page = memdup_user_nul(buf, count); 14568365a719SAl Viro if (IS_ERR(page)) 14578365a719SAl Viro return PTR_ERR(page); 1458b77a493bSEric Paris 1459b77a493bSEric Paris ret = -EINVAL; 1460b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1461b77a493bSEric Paris goto out; 1462b77a493bSEric Paris 14636b6bc620SStephen Smalley avc_set_cache_threshold(state->avc, new_value); 1464b77a493bSEric Paris 14651da177e4SLinus Torvalds ret = count; 14661da177e4SLinus Torvalds out: 14678365a719SAl Viro kfree(page); 14681da177e4SLinus Torvalds return ret; 14691da177e4SLinus Torvalds } 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 14721da177e4SLinus Torvalds size_t count, loff_t *ppos) 14731da177e4SLinus Torvalds { 14746b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14756b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14761da177e4SLinus Torvalds char *page; 1477b77a493bSEric Paris ssize_t length; 14781da177e4SLinus Torvalds 14791da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1480b77a493bSEric Paris if (!page) 1481b77a493bSEric Paris return -ENOMEM; 1482b77a493bSEric Paris 14836b6bc620SStephen Smalley length = avc_get_hash_stats(state->avc, page); 1484b77a493bSEric Paris if (length >= 0) 1485b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 14861da177e4SLinus Torvalds free_page((unsigned long)page); 1487b77a493bSEric Paris 1488b77a493bSEric Paris return length; 14891da177e4SLinus Torvalds } 14901da177e4SLinus Torvalds 14919c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 14921da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 14931da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 149457a62c23SArnd Bergmann .llseek = generic_file_llseek, 14951da177e4SLinus Torvalds }; 14961da177e4SLinus Torvalds 14979c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 14981da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 149957a62c23SArnd Bergmann .llseek = generic_file_llseek, 15001da177e4SLinus Torvalds }; 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15031da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 15041da177e4SLinus Torvalds { 15051da177e4SLinus Torvalds int cpu; 15061da177e4SLinus Torvalds 15074f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 15081da177e4SLinus Torvalds if (!cpu_possible(cpu)) 15091da177e4SLinus Torvalds continue; 15101da177e4SLinus Torvalds *idx = cpu + 1; 15111da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds return NULL; 15141da177e4SLinus Torvalds } 15151da177e4SLinus Torvalds 15161da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 15171da177e4SLinus Torvalds { 15181da177e4SLinus Torvalds loff_t n = *pos - 1; 15191da177e4SLinus Torvalds 15201da177e4SLinus Torvalds if (*pos == 0) 15211da177e4SLinus Torvalds return SEQ_START_TOKEN; 15221da177e4SLinus Torvalds 15231da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 15241da177e4SLinus Torvalds } 15251da177e4SLinus Torvalds 15261da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 15271da177e4SLinus Torvalds { 15281da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 15291da177e4SLinus Torvalds } 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 15321da177e4SLinus Torvalds { 15331da177e4SLinus Torvalds struct avc_cache_stats *st = v; 15341da177e4SLinus Torvalds 1535710a0647SMarkus Elfring if (v == SEQ_START_TOKEN) { 1536710a0647SMarkus Elfring seq_puts(seq, 1537710a0647SMarkus Elfring "lookups hits misses allocations reclaims frees\n"); 1538710a0647SMarkus Elfring } else { 1539257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1540257313b2SLinus Torvalds unsigned int misses = st->misses; 1541257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1542257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1543257313b2SLinus Torvalds hits, misses, st->allocations, 15441da177e4SLinus Torvalds st->reclaims, st->frees); 1545257313b2SLinus Torvalds } 15461da177e4SLinus Torvalds return 0; 15471da177e4SLinus Torvalds } 15481da177e4SLinus Torvalds 15491da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 15501da177e4SLinus Torvalds { } 15511da177e4SLinus Torvalds 15521996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 15531da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 15541da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 15551da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 15561da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 15571da177e4SLinus Torvalds }; 15581da177e4SLinus Torvalds 15591da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 15601da177e4SLinus Torvalds { 15611da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 15621da177e4SLinus Torvalds } 15631da177e4SLinus Torvalds 15649c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 15651da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 15661da177e4SLinus Torvalds .read = seq_read, 15671da177e4SLinus Torvalds .llseek = seq_lseek, 15681da177e4SLinus Torvalds .release = seq_release, 15691da177e4SLinus Torvalds }; 15701da177e4SLinus Torvalds #endif 15711da177e4SLinus Torvalds 15721da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 15731da177e4SLinus Torvalds { 15740619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 15750619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1576b77a493bSEric Paris int i; 1577cda37124SEric Biggers static const struct tree_descr files[] = { 15781da177e4SLinus Torvalds { "cache_threshold", 15791da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 15801da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 15811da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15821da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 15831da177e4SLinus Torvalds #endif 15841da177e4SLinus Torvalds }; 15851da177e4SLinus Torvalds 15866e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 15871da177e4SLinus Torvalds struct inode *inode; 15881da177e4SLinus Torvalds struct dentry *dentry; 15891da177e4SLinus Torvalds 15901da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1591b77a493bSEric Paris if (!dentry) 1592b77a493bSEric Paris return -ENOMEM; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 1595b77a493bSEric Paris if (!inode) 1596b77a493bSEric Paris return -ENOMEM; 1597b77a493bSEric Paris 15981da177e4SLinus Torvalds inode->i_fop = files[i].ops; 15990619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 16001da177e4SLinus Torvalds d_add(dentry, inode); 16011da177e4SLinus Torvalds } 1602b77a493bSEric Paris 1603b77a493bSEric Paris return 0; 16041da177e4SLinus Torvalds } 16051da177e4SLinus Torvalds 1606f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1607f0ee2e46SJames Carter size_t count, loff_t *ppos) 1608f0ee2e46SJames Carter { 16090619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1610f0ee2e46SJames Carter char *con; 1611f0ee2e46SJames Carter u32 sid, len; 1612f0ee2e46SJames Carter ssize_t ret; 1613f0ee2e46SJames Carter 1614496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 16150619f0f5SStephen Smalley ret = security_sid_to_context(fsi->state, sid, &con, &len); 1616b77a493bSEric Paris if (ret) 1617f0ee2e46SJames Carter return ret; 1618f0ee2e46SJames Carter 1619f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1620f0ee2e46SJames Carter kfree(con); 1621f0ee2e46SJames Carter return ret; 1622f0ee2e46SJames Carter } 1623f0ee2e46SJames Carter 1624f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1625f0ee2e46SJames Carter .read = sel_read_initcon, 162657a62c23SArnd Bergmann .llseek = generic_file_llseek, 1627f0ee2e46SJames Carter }; 1628f0ee2e46SJames Carter 1629f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1630f0ee2e46SJames Carter { 1631b77a493bSEric Paris int i; 1632f0ee2e46SJames Carter 1633f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1634f0ee2e46SJames Carter struct inode *inode; 1635f0ee2e46SJames Carter struct dentry *dentry; 1636f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1637b77a493bSEric Paris if (!dentry) 1638b77a493bSEric Paris return -ENOMEM; 1639f0ee2e46SJames Carter 1640f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1641b77a493bSEric Paris if (!inode) 1642b77a493bSEric Paris return -ENOMEM; 1643b77a493bSEric Paris 1644f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1645f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1646f0ee2e46SJames Carter d_add(dentry, inode); 1647f0ee2e46SJames Carter } 1648b77a493bSEric Paris 1649b77a493bSEric Paris return 0; 1650f0ee2e46SJames Carter } 1651f0ee2e46SJames Carter 1652e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1653e47c8fc5SChristopher J. PeBenito { 1654e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1655e47c8fc5SChristopher J. PeBenito } 1656e47c8fc5SChristopher J. PeBenito 1657e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1658e47c8fc5SChristopher J. PeBenito { 165992ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1660e47c8fc5SChristopher J. PeBenito } 1661e47c8fc5SChristopher J. PeBenito 1662e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1663e47c8fc5SChristopher J. PeBenito { 1664e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1665e47c8fc5SChristopher J. PeBenito } 1666e47c8fc5SChristopher J. PeBenito 1667e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1668e47c8fc5SChristopher J. PeBenito { 1669e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1670e47c8fc5SChristopher J. PeBenito } 1671e47c8fc5SChristopher J. PeBenito 1672e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1673e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1674e47c8fc5SChristopher J. PeBenito { 1675496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1676cc1dad71SAl Viro char res[TMPBUFLEN]; 1677cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1678cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1679e47c8fc5SChristopher J. PeBenito } 1680e47c8fc5SChristopher J. PeBenito 1681e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1682e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 168357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1684e47c8fc5SChristopher J. PeBenito }; 1685e47c8fc5SChristopher J. PeBenito 1686e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1687e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1688e47c8fc5SChristopher J. PeBenito { 1689496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1690cc1dad71SAl Viro char res[TMPBUFLEN]; 1691cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1692cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1693e47c8fc5SChristopher J. PeBenito } 1694e47c8fc5SChristopher J. PeBenito 1695e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1696e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 169757a62c23SArnd Bergmann .llseek = generic_file_llseek, 1698e47c8fc5SChristopher J. PeBenito }; 1699e47c8fc5SChristopher J. PeBenito 17003bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 17013bb56b25SPaul Moore size_t count, loff_t *ppos) 17023bb56b25SPaul Moore { 17030619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 17043bb56b25SPaul Moore int value; 17053bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 17063bb56b25SPaul Moore ssize_t length; 1707496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 17083bb56b25SPaul Moore 17090619f0f5SStephen Smalley value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); 17103bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 17113bb56b25SPaul Moore 17123bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 17133bb56b25SPaul Moore } 17143bb56b25SPaul Moore 17153bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 17163bb56b25SPaul Moore .read = sel_read_policycap, 171757a62c23SArnd Bergmann .llseek = generic_file_llseek, 17183bb56b25SPaul Moore }; 17193bb56b25SPaul Moore 1720e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1721e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1722e47c8fc5SChristopher J. PeBenito { 17230619f0f5SStephen Smalley struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; 1724b77a493bSEric Paris int i, rc, nperms; 1725e47c8fc5SChristopher J. PeBenito char **perms; 1726e47c8fc5SChristopher J. PeBenito 17270619f0f5SStephen Smalley rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); 1728e47c8fc5SChristopher J. PeBenito if (rc) 1729b77a493bSEric Paris return rc; 1730e47c8fc5SChristopher J. PeBenito 1731e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1732e47c8fc5SChristopher J. PeBenito struct inode *inode; 1733e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1734e47c8fc5SChristopher J. PeBenito 1735b77a493bSEric Paris rc = -ENOMEM; 1736e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1737b77a493bSEric Paris if (!dentry) 1738b77a493bSEric Paris goto out; 1739e47c8fc5SChristopher J. PeBenito 1740e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1741b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1742b77a493bSEric Paris if (!inode) 1743b77a493bSEric Paris goto out; 1744b77a493bSEric Paris 1745e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1746e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1747e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1748e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1749e47c8fc5SChristopher J. PeBenito } 1750b77a493bSEric Paris rc = 0; 1751b77a493bSEric Paris out: 1752e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1753e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1754e47c8fc5SChristopher J. PeBenito kfree(perms); 1755e47c8fc5SChristopher J. PeBenito return rc; 1756e47c8fc5SChristopher J. PeBenito } 1757e47c8fc5SChristopher J. PeBenito 1758e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1759e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1760e47c8fc5SChristopher J. PeBenito { 17610619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 17620619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1763e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1764e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1765e47c8fc5SChristopher J. PeBenito int rc; 1766e47c8fc5SChristopher J. PeBenito 1767e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1768b77a493bSEric Paris if (!dentry) 1769b77a493bSEric Paris return -ENOMEM; 1770e47c8fc5SChristopher J. PeBenito 1771e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 1772b77a493bSEric Paris if (!inode) 1773b77a493bSEric Paris return -ENOMEM; 1774e47c8fc5SChristopher J. PeBenito 1775e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1776e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1777e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1778e47c8fc5SChristopher J. PeBenito 17790619f0f5SStephen Smalley dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); 1780a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1781a1c2aa1eSAl Viro return PTR_ERR(dentry); 1782e47c8fc5SChristopher J. PeBenito 1783e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1784e47c8fc5SChristopher J. PeBenito 1785e47c8fc5SChristopher J. PeBenito return rc; 1786e47c8fc5SChristopher J. PeBenito } 1787e47c8fc5SChristopher J. PeBenito 17880619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi) 1789e47c8fc5SChristopher J. PeBenito { 17900619f0f5SStephen Smalley 1791b77a493bSEric Paris int rc, nclasses, i; 1792e47c8fc5SChristopher J. PeBenito char **classes; 1793e47c8fc5SChristopher J. PeBenito 1794e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 17950619f0f5SStephen Smalley sel_remove_entries(fsi->class_dir); 1796e47c8fc5SChristopher J. PeBenito 17970619f0f5SStephen Smalley rc = security_get_classes(fsi->state, &classes, &nclasses); 1798b77a493bSEric Paris if (rc) 1799b77a493bSEric Paris return rc; 1800e47c8fc5SChristopher J. PeBenito 1801e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 18020619f0f5SStephen Smalley fsi->last_class_ino = sel_class_to_ino(nclasses + 2); 1803e47c8fc5SChristopher J. PeBenito 1804e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1805e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1806e47c8fc5SChristopher J. PeBenito 18070619f0f5SStephen Smalley class_name_dir = sel_make_dir(fsi->class_dir, classes[i], 18080619f0f5SStephen Smalley &fsi->last_class_ino); 1809a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1810a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1811b77a493bSEric Paris goto out; 1812a1c2aa1eSAl Viro } 1813e47c8fc5SChristopher J. PeBenito 1814e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1815e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1816e47c8fc5SChristopher J. PeBenito class_name_dir); 1817e47c8fc5SChristopher J. PeBenito if (rc) 1818b77a493bSEric Paris goto out; 1819e47c8fc5SChristopher J. PeBenito } 1820b77a493bSEric Paris rc = 0; 1821b77a493bSEric Paris out: 1822e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1823e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1824e47c8fc5SChristopher J. PeBenito kfree(classes); 1825e47c8fc5SChristopher J. PeBenito return rc; 1826e47c8fc5SChristopher J. PeBenito } 1827e47c8fc5SChristopher J. PeBenito 18280619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi) 18293bb56b25SPaul Moore { 18303bb56b25SPaul Moore unsigned int iter; 18313bb56b25SPaul Moore struct dentry *dentry = NULL; 18323bb56b25SPaul Moore struct inode *inode = NULL; 18333bb56b25SPaul Moore 18340619f0f5SStephen Smalley sel_remove_entries(fsi->policycap_dir); 18353bb56b25SPaul Moore 18363bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 18374dc2fce3SStephen Smalley if (iter < ARRAY_SIZE(selinux_policycap_names)) 18380619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, 18394dc2fce3SStephen Smalley selinux_policycap_names[iter]); 18403bb56b25SPaul Moore else 18410619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, "unknown"); 18423bb56b25SPaul Moore 18433bb56b25SPaul Moore if (dentry == NULL) 18443bb56b25SPaul Moore return -ENOMEM; 18453bb56b25SPaul Moore 18460619f0f5SStephen Smalley inode = sel_make_inode(fsi->sb, S_IFREG | 0444); 18473bb56b25SPaul Moore if (inode == NULL) 18483bb56b25SPaul Moore return -ENOMEM; 18493bb56b25SPaul Moore 18503bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 18513bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 18523bb56b25SPaul Moore d_add(dentry, inode); 18533bb56b25SPaul Moore } 18543bb56b25SPaul Moore 18553bb56b25SPaul Moore return 0; 18563bb56b25SPaul Moore } 18573bb56b25SPaul Moore 1858a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 18590dd4ae51SChristopher J. PeBenito unsigned long *ino) 18601da177e4SLinus Torvalds { 1861a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 18621da177e4SLinus Torvalds struct inode *inode; 18631da177e4SLinus Torvalds 1864a1c2aa1eSAl Viro if (!dentry) 1865a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1866a1c2aa1eSAl Viro 1867a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1868a1c2aa1eSAl Viro if (!inode) { 1869a1c2aa1eSAl Viro dput(dentry); 1870a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1871a1c2aa1eSAl Viro } 1872b77a493bSEric Paris 18731da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 18741da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 18750dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 187640e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1877d8c76e6fSDave Hansen inc_nlink(inode); 18781da177e4SLinus Torvalds d_add(dentry, inode); 1879edb20fb5SJames Morris /* bump link count on parent directory, too */ 1880ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1881b77a493bSEric Paris 1882a1c2aa1eSAl Viro return dentry; 18831da177e4SLinus Torvalds } 18841da177e4SLinus Torvalds 18850619f0f5SStephen Smalley #define NULL_FILE_NAME "null" 18860619f0f5SStephen Smalley 18871da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 18881da177e4SLinus Torvalds { 18890619f0f5SStephen Smalley struct selinux_fs_info *fsi; 18901da177e4SLinus Torvalds int ret; 18911da177e4SLinus Torvalds struct dentry *dentry; 1892a1c2aa1eSAl Viro struct inode *inode; 18931da177e4SLinus Torvalds struct inode_security_struct *isec; 18941da177e4SLinus Torvalds 1895cda37124SEric Biggers static const struct tree_descr selinux_files[] = { 18961da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 18971da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1898ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 18991da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 19001da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 19011da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 19021da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 19031da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 19041da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 19051da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 19061da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 19071da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 19081da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 19093f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 19103f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 191111904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 191272e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1913f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1914f9df6458SAndrew Perepechko S_IWUGO}, 19151da177e4SLinus Torvalds /* last one */ {""} 19161da177e4SLinus Torvalds }; 19170619f0f5SStephen Smalley 19180619f0f5SStephen Smalley ret = selinux_fs_info_create(sb); 19190619f0f5SStephen Smalley if (ret) 19200619f0f5SStephen Smalley goto err; 19210619f0f5SStephen Smalley 19221da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 19231da177e4SLinus Torvalds if (ret) 1924161ce45aSJames Morris goto err; 19251da177e4SLinus Torvalds 19260619f0f5SStephen Smalley fsi = sb->s_fs_info; 19270619f0f5SStephen Smalley fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); 19280619f0f5SStephen Smalley if (IS_ERR(fsi->bool_dir)) { 19290619f0f5SStephen Smalley ret = PTR_ERR(fsi->bool_dir); 19300619f0f5SStephen Smalley fsi->bool_dir = NULL; 1931161ce45aSJames Morris goto err; 1932a1c2aa1eSAl Viro } 19331da177e4SLinus Torvalds 1934b77a493bSEric Paris ret = -ENOMEM; 19351da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1936b77a493bSEric Paris if (!dentry) 1937161ce45aSJames Morris goto err; 19381da177e4SLinus Torvalds 1939161ce45aSJames Morris ret = -ENOMEM; 1940b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 1941b77a493bSEric Paris if (!inode) 1942161ce45aSJames Morris goto err; 1943b77a493bSEric Paris 19440619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 19451da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 19461da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 19471da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 194842059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 19511da177e4SLinus Torvalds d_add(dentry, inode); 19521da177e4SLinus Torvalds 19530619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); 1954a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1955a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1956161ce45aSJames Morris goto err; 1957a1c2aa1eSAl Viro } 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 19601da177e4SLinus Torvalds if (ret) 1961161ce45aSJames Morris goto err; 1962f0ee2e46SJames Carter 19630619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); 1964a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1965a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1966f0ee2e46SJames Carter goto err; 1967a1c2aa1eSAl Viro } 1968f0ee2e46SJames Carter 1969f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1970f0ee2e46SJames Carter if (ret) 1971f0ee2e46SJames Carter goto err; 1972f0ee2e46SJames Carter 19730619f0f5SStephen Smalley fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); 19740619f0f5SStephen Smalley if (IS_ERR(fsi->class_dir)) { 19750619f0f5SStephen Smalley ret = PTR_ERR(fsi->class_dir); 19760619f0f5SStephen Smalley fsi->class_dir = NULL; 1977e47c8fc5SChristopher J. PeBenito goto err; 1978a1c2aa1eSAl Viro } 1979e47c8fc5SChristopher J. PeBenito 19800619f0f5SStephen Smalley fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", 19810619f0f5SStephen Smalley &fsi->last_ino); 19820619f0f5SStephen Smalley if (IS_ERR(fsi->policycap_dir)) { 19830619f0f5SStephen Smalley ret = PTR_ERR(fsi->policycap_dir); 19840619f0f5SStephen Smalley fsi->policycap_dir = NULL; 1985e47c8fc5SChristopher J. PeBenito goto err; 1986a1c2aa1eSAl Viro } 19870619f0f5SStephen Smalley 19880619f0f5SStephen Smalley ret = sel_make_policy_nodes(fsi); 19890619f0f5SStephen Smalley if (ret) 19900619f0f5SStephen Smalley goto err; 1991b77a493bSEric Paris return 0; 1992161ce45aSJames Morris err: 1993744ba35eSEric Paris printk(KERN_ERR "SELinux: %s: failed while creating inodes\n", 1994744ba35eSEric Paris __func__); 19950619f0f5SStephen Smalley 19960619f0f5SStephen Smalley selinux_fs_info_free(sb); 19970619f0f5SStephen Smalley 1998b77a493bSEric Paris return ret; 19991da177e4SLinus Torvalds } 20001da177e4SLinus Torvalds 2001fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 2002fc14f2feSAl Viro int flags, const char *dev_name, void *data) 20031da177e4SLinus Torvalds { 2004fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 20051da177e4SLinus Torvalds } 20061da177e4SLinus Torvalds 20070619f0f5SStephen Smalley static void sel_kill_sb(struct super_block *sb) 20080619f0f5SStephen Smalley { 20090619f0f5SStephen Smalley selinux_fs_info_free(sb); 20100619f0f5SStephen Smalley kill_litter_super(sb); 20110619f0f5SStephen Smalley } 20120619f0f5SStephen Smalley 20131da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 20141da177e4SLinus Torvalds .name = "selinuxfs", 2015fc14f2feSAl Viro .mount = sel_mount, 20160619f0f5SStephen Smalley .kill_sb = sel_kill_sb, 20171da177e4SLinus Torvalds }; 20181da177e4SLinus Torvalds 20191da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 20200619f0f5SStephen Smalley struct path selinux_null; 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds static int __init init_sel_fs(void) 20231da177e4SLinus Torvalds { 20240619f0f5SStephen Smalley struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, 20250619f0f5SStephen Smalley sizeof(NULL_FILE_NAME)-1); 20261da177e4SLinus Torvalds int err; 20271da177e4SLinus Torvalds 20281da177e4SLinus Torvalds if (!selinux_enabled) 20291da177e4SLinus Torvalds return 0; 20307a627e3bSGreg Kroah-Hartman 2031f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 2032f9bb4882SEric W. Biederman if (err) 2033f9bb4882SEric W. Biederman return err; 20347a627e3bSGreg Kroah-Hartman 20351da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 20367a627e3bSGreg Kroah-Hartman if (err) { 2037f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2038b77a493bSEric Paris return err; 20397a627e3bSGreg Kroah-Hartman } 2040b77a493bSEric Paris 2041765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 20421da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 20431da177e4SLinus Torvalds printk(KERN_ERR "selinuxfs: could not mount!\n"); 20441da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 20451da177e4SLinus Torvalds selinuxfs_mount = NULL; 20461da177e4SLinus Torvalds } 20470619f0f5SStephen Smalley selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, 20480619f0f5SStephen Smalley &null_name); 20490619f0f5SStephen Smalley if (IS_ERR(selinux_null.dentry)) { 20500619f0f5SStephen Smalley pr_err("selinuxfs: could not lookup null!\n"); 20510619f0f5SStephen Smalley err = PTR_ERR(selinux_null.dentry); 20520619f0f5SStephen Smalley selinux_null.dentry = NULL; 20530619f0f5SStephen Smalley } 2054b77a493bSEric Paris 20551da177e4SLinus Torvalds return err; 20561da177e4SLinus Torvalds } 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds __initcall(init_sel_fs); 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 20611da177e4SLinus Torvalds void exit_sel_fs(void) 20621da177e4SLinus Torvalds { 2063f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2064fd40ffc7SStephen Smalley dput(selinux_null.dentry); 2065423e0ab0STim Chen kern_unmount(selinuxfs_mount); 20661da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 20671da177e4SLinus Torvalds } 20681da177e4SLinus Torvalds #endif 2069