1a10e763bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Added conditional policy language extensions 51da177e4SLinus Torvalds * 682c21bfaSPaul Moore * Updated: Hewlett-Packard <paul@paul-moore.com> 73bb56b25SPaul Moore * 83bb56b25SPaul Moore * Added support for the policy capability bitmap 93bb56b25SPaul Moore * 103bb56b25SPaul Moore * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. 111da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 121da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 131da177e4SLinus Torvalds */ 141da177e4SLinus Torvalds 151da177e4SLinus Torvalds #include <linux/kernel.h> 161da177e4SLinus Torvalds #include <linux/pagemap.h> 171da177e4SLinus Torvalds #include <linux/slab.h> 181da177e4SLinus Torvalds #include <linux/vmalloc.h> 191da177e4SLinus Torvalds #include <linux/fs.h> 20920f50b2SDavid Howells #include <linux/fs_context.h> 210619f0f5SStephen Smalley #include <linux/mount.h> 22bb003079SIngo Molnar #include <linux/mutex.h> 231da177e4SLinus Torvalds #include <linux/init.h> 241da177e4SLinus Torvalds #include <linux/string.h> 251da177e4SLinus Torvalds #include <linux/security.h> 261da177e4SLinus Torvalds #include <linux/major.h> 271da177e4SLinus Torvalds #include <linux/seq_file.h> 281da177e4SLinus Torvalds #include <linux/percpu.h> 29af601e46SSteve Grubb #include <linux/audit.h> 30f5269710SEric Paris #include <linux/uaccess.h> 317a627e3bSGreg Kroah-Hartman #include <linux/kobject.h> 320f7e4c33SKohei Kaigai #include <linux/ctype.h> 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 351da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include "flask.h" 381da177e4SLinus Torvalds #include "avc.h" 391da177e4SLinus Torvalds #include "avc_ss.h" 401da177e4SLinus Torvalds #include "security.h" 411da177e4SLinus Torvalds #include "objsec.h" 421da177e4SLinus Torvalds #include "conditional.h" 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds enum sel_inos { 451da177e4SLinus Torvalds SEL_ROOT_INO = 2, 461da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 471da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 481da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 491da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 501da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 511da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 521da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 531da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 541da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 551da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 561da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 571da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 581da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 594e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 603f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 613f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 6211904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 63cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 64f9df6458SAndrew Perepechko SEL_VALIDATE_TRANS, /* compute validatetrans decision */ 656174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 661da177e4SLinus Torvalds }; 671da177e4SLinus Torvalds 680619f0f5SStephen Smalley struct selinux_fs_info { 690619f0f5SStephen Smalley struct dentry *bool_dir; 700619f0f5SStephen Smalley unsigned int bool_num; 710619f0f5SStephen Smalley char **bool_pending_names; 720619f0f5SStephen Smalley unsigned int *bool_pending_values; 730619f0f5SStephen Smalley struct dentry *class_dir; 740619f0f5SStephen Smalley unsigned long last_class_ino; 750619f0f5SStephen Smalley bool policy_opened; 760619f0f5SStephen Smalley struct dentry *policycap_dir; 770619f0f5SStephen Smalley struct mutex mutex; 780619f0f5SStephen Smalley unsigned long last_ino; 790619f0f5SStephen Smalley struct selinux_state *state; 800619f0f5SStephen Smalley struct super_block *sb; 810619f0f5SStephen Smalley }; 820619f0f5SStephen Smalley 830619f0f5SStephen Smalley static int selinux_fs_info_create(struct super_block *sb) 840619f0f5SStephen Smalley { 850619f0f5SStephen Smalley struct selinux_fs_info *fsi; 860619f0f5SStephen Smalley 870619f0f5SStephen Smalley fsi = kzalloc(sizeof(*fsi), GFP_KERNEL); 880619f0f5SStephen Smalley if (!fsi) 890619f0f5SStephen Smalley return -ENOMEM; 900619f0f5SStephen Smalley 910619f0f5SStephen Smalley mutex_init(&fsi->mutex); 920619f0f5SStephen Smalley fsi->last_ino = SEL_INO_NEXT - 1; 930619f0f5SStephen Smalley fsi->state = &selinux_state; 940619f0f5SStephen Smalley fsi->sb = sb; 950619f0f5SStephen Smalley sb->s_fs_info = fsi; 960619f0f5SStephen Smalley return 0; 970619f0f5SStephen Smalley } 980619f0f5SStephen Smalley 990619f0f5SStephen Smalley static void selinux_fs_info_free(struct super_block *sb) 1000619f0f5SStephen Smalley { 1010619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1020619f0f5SStephen Smalley int i; 1030619f0f5SStephen Smalley 1040619f0f5SStephen Smalley if (fsi) { 1050619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 1060619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 1070619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 1080619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 1090619f0f5SStephen Smalley } 1100619f0f5SStephen Smalley kfree(sb->s_fs_info); 1110619f0f5SStephen Smalley sb->s_fs_info = NULL; 1120619f0f5SStephen Smalley } 1136174eafcSJames Carter 114f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 115bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 116e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1173bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 118f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 119f0ee2e46SJames Carter 1201da177e4SLinus Torvalds #define TMPBUFLEN 12 1211da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1221da177e4SLinus Torvalds size_t count, loff_t *ppos) 1231da177e4SLinus Torvalds { 1240619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 1251da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1261da177e4SLinus Torvalds ssize_t length; 1271da177e4SLinus Torvalds 128aa8e712cSStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 1290619f0f5SStephen Smalley enforcing_enabled(fsi->state)); 1301da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1311da177e4SLinus Torvalds } 1321da177e4SLinus Torvalds 1331da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1341da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1351da177e4SLinus Torvalds size_t count, loff_t *ppos) 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds { 1380619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1390619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 140b77a493bSEric Paris char *page = NULL; 1411da177e4SLinus Torvalds ssize_t length; 142aa8e712cSStephen Smalley int old_value, new_value; 1431da177e4SLinus Torvalds 144bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1458365a719SAl Viro return -ENOMEM; 146b77a493bSEric Paris 1471da177e4SLinus Torvalds /* No partial writes. */ 148b77a493bSEric Paris if (*ppos != 0) 1498365a719SAl Viro return -EINVAL; 150b77a493bSEric Paris 1518365a719SAl Viro page = memdup_user_nul(buf, count); 1528365a719SAl Viro if (IS_ERR(page)) 1538365a719SAl Viro return PTR_ERR(page); 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds length = -EINVAL; 1561da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1571da177e4SLinus Torvalds goto out; 1581da177e4SLinus Torvalds 159ea49d10eSStephen Smalley new_value = !!new_value; 160ea49d10eSStephen Smalley 1610619f0f5SStephen Smalley old_value = enforcing_enabled(state); 162aa8e712cSStephen Smalley if (new_value != old_value) { 1636b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 1646b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 165be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETENFORCE, 166be0554c9SStephen Smalley NULL); 1671da177e4SLinus Torvalds if (length) 1681da177e4SLinus Torvalds goto out; 169cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, 1704195ed42SRichard Guy Briggs "enforcing=%d old_enforcing=%d auid=%u ses=%u" 1716c5a682eSStephen Smalley " enabled=1 old-enabled=1 lsm=selinux res=1", 172aa8e712cSStephen Smalley new_value, old_value, 173581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 1746c5a682eSStephen Smalley 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) 18142df744cSJanne Karhunen call_blocking_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; 2824195ed42SRichard Guy Briggs int enforcing; 2831da177e4SLinus Torvalds 284bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2858365a719SAl Viro return -ENOMEM; 286b77a493bSEric Paris 2871da177e4SLinus Torvalds /* No partial writes. */ 288b77a493bSEric Paris if (*ppos != 0) 2898365a719SAl Viro return -EINVAL; 290b77a493bSEric Paris 2918365a719SAl Viro page = memdup_user_nul(buf, count); 2928365a719SAl Viro if (IS_ERR(page)) 2938365a719SAl Viro return PTR_ERR(page); 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds length = -EINVAL; 2961da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2971da177e4SLinus Torvalds goto out; 2981da177e4SLinus Torvalds 2991da177e4SLinus Torvalds if (new_value) { 3004195ed42SRichard Guy Briggs enforcing = enforcing_enabled(fsi->state); 3010619f0f5SStephen Smalley length = selinux_disable(fsi->state); 302b77a493bSEric Paris if (length) 3031da177e4SLinus Torvalds goto out; 304cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, 3054195ed42SRichard Guy Briggs "enforcing=%d old_enforcing=%d auid=%u ses=%u" 3066c5a682eSStephen Smalley " enabled=0 old-enabled=1 lsm=selinux res=1", 3074195ed42SRichard Guy Briggs enforcing, enforcing, 308581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 3096c5a682eSStephen Smalley audit_get_sessionid(current)); 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvalds length = count; 3131da177e4SLinus Torvalds out: 3148365a719SAl Viro kfree(page); 3151da177e4SLinus Torvalds return length; 3161da177e4SLinus Torvalds } 3171da177e4SLinus Torvalds #else 3181da177e4SLinus Torvalds #define sel_write_disable NULL 3191da177e4SLinus Torvalds #endif 3201da177e4SLinus Torvalds 3219c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3221da177e4SLinus Torvalds .write = sel_write_disable, 32357a62c23SArnd Bergmann .llseek = generic_file_llseek, 3241da177e4SLinus Torvalds }; 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3271da177e4SLinus Torvalds size_t count, loff_t *ppos) 3281da177e4SLinus Torvalds { 3291da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3301da177e4SLinus Torvalds ssize_t length; 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3331da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3341da177e4SLinus Torvalds } 3351da177e4SLinus Torvalds 3369c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3371da177e4SLinus Torvalds .read = sel_read_policyvers, 33857a62c23SArnd Bergmann .llseek = generic_file_llseek, 3391da177e4SLinus Torvalds }; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds /* declaration for sel_write_load */ 3420619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi); 3430619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi); 3440619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi); 345e47c8fc5SChristopher J. PeBenito 346e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 347a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 348e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3511da177e4SLinus Torvalds size_t count, loff_t *ppos) 3521da177e4SLinus Torvalds { 3530619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 3541da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3551da177e4SLinus Torvalds ssize_t length; 3561da177e4SLinus Torvalds 3570719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3580619f0f5SStephen Smalley security_mls_enabled(fsi->state)); 3591da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 3629c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3631da177e4SLinus Torvalds .read = sel_read_mls, 36457a62c23SArnd Bergmann .llseek = generic_file_llseek, 3651da177e4SLinus Torvalds }; 3661da177e4SLinus Torvalds 367cee74f47SEric Paris struct policy_load_memory { 368cee74f47SEric Paris size_t len; 369cee74f47SEric Paris void *data; 370cee74f47SEric Paris }; 371cee74f47SEric Paris 372cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 373cee74f47SEric Paris { 3740619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 3750619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 376cee74f47SEric Paris struct policy_load_memory *plm = NULL; 377cee74f47SEric Paris int rc; 378cee74f47SEric Paris 379cee74f47SEric Paris BUG_ON(filp->private_data); 380cee74f47SEric Paris 3810619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 382cee74f47SEric Paris 3836b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 3846b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 385be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 386cee74f47SEric Paris if (rc) 387cee74f47SEric Paris goto err; 388cee74f47SEric Paris 389cee74f47SEric Paris rc = -EBUSY; 3900619f0f5SStephen Smalley if (fsi->policy_opened) 391cee74f47SEric Paris goto err; 392cee74f47SEric Paris 393cee74f47SEric Paris rc = -ENOMEM; 394cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 395cee74f47SEric Paris if (!plm) 396cee74f47SEric Paris goto err; 397cee74f47SEric Paris 3980619f0f5SStephen Smalley if (i_size_read(inode) != security_policydb_len(state)) { 3995955102cSAl Viro inode_lock(inode); 4000619f0f5SStephen Smalley i_size_write(inode, security_policydb_len(state)); 4015955102cSAl Viro inode_unlock(inode); 402cee74f47SEric Paris } 403cee74f47SEric Paris 4040619f0f5SStephen Smalley rc = security_read_policy(state, &plm->data, &plm->len); 405cee74f47SEric Paris if (rc) 406cee74f47SEric Paris goto err; 407cee74f47SEric Paris 4080619f0f5SStephen Smalley fsi->policy_opened = 1; 409cee74f47SEric Paris 410cee74f47SEric Paris filp->private_data = plm; 411cee74f47SEric Paris 4120619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 413cee74f47SEric Paris 414cee74f47SEric Paris return 0; 415cee74f47SEric Paris err: 4160619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 417cee74f47SEric Paris 418cee74f47SEric Paris if (plm) 419cee74f47SEric Paris vfree(plm->data); 420cee74f47SEric Paris kfree(plm); 421cee74f47SEric Paris return rc; 422cee74f47SEric Paris } 423cee74f47SEric Paris 424cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 425cee74f47SEric Paris { 4260619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 427cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 428cee74f47SEric Paris 429cee74f47SEric Paris BUG_ON(!plm); 430cee74f47SEric Paris 4310619f0f5SStephen Smalley fsi->policy_opened = 0; 432cee74f47SEric Paris 433cee74f47SEric Paris vfree(plm->data); 434cee74f47SEric Paris kfree(plm); 435cee74f47SEric Paris 436cee74f47SEric Paris return 0; 437cee74f47SEric Paris } 438cee74f47SEric Paris 439cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 440cee74f47SEric Paris size_t count, loff_t *ppos) 441cee74f47SEric Paris { 442cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 443cee74f47SEric Paris int ret; 444cee74f47SEric Paris 4456b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 4466b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 447be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 448cee74f47SEric Paris if (ret) 449cee74f47SEric Paris return ret; 4500da74120SJann Horn 4510da74120SJann Horn return simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 452cee74f47SEric Paris } 453cee74f47SEric Paris 454ac9a1f6dSSouptick Joarder static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf) 455845ca30fSEric Paris { 45611bac800SDave Jiang struct policy_load_memory *plm = vmf->vma->vm_file->private_data; 457845ca30fSEric Paris unsigned long offset; 458845ca30fSEric Paris struct page *page; 459845ca30fSEric Paris 460845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 461845ca30fSEric Paris return VM_FAULT_SIGBUS; 462845ca30fSEric Paris 463845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 464845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 465845ca30fSEric Paris return VM_FAULT_SIGBUS; 466845ca30fSEric Paris 467845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 468845ca30fSEric Paris get_page(page); 469845ca30fSEric Paris 470845ca30fSEric Paris vmf->page = page; 471845ca30fSEric Paris 472845ca30fSEric Paris return 0; 473845ca30fSEric Paris } 474845ca30fSEric Paris 4757cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 476845ca30fSEric Paris .fault = sel_mmap_policy_fault, 477845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 478845ca30fSEric Paris }; 479845ca30fSEric Paris 480ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 481845ca30fSEric Paris { 482845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 483845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 484845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 485845ca30fSEric Paris 486845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 487845ca30fSEric Paris return -EACCES; 488845ca30fSEric Paris } 489845ca30fSEric Paris 490314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 491845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 492845ca30fSEric Paris 493845ca30fSEric Paris return 0; 494845ca30fSEric Paris } 495845ca30fSEric Paris 496cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 497cee74f47SEric Paris .open = sel_open_policy, 498cee74f47SEric Paris .read = sel_read_policy, 499845ca30fSEric Paris .mmap = sel_mmap_policy, 500cee74f47SEric Paris .release = sel_release_policy, 50147a93a5bSEric Paris .llseek = generic_file_llseek, 502cee74f47SEric Paris }; 503cee74f47SEric Paris 5040619f0f5SStephen Smalley static int sel_make_policy_nodes(struct selinux_fs_info *fsi) 5050619f0f5SStephen Smalley { 5060619f0f5SStephen Smalley int ret; 5070619f0f5SStephen Smalley 5080619f0f5SStephen Smalley ret = sel_make_bools(fsi); 5090619f0f5SStephen Smalley if (ret) { 5100619f0f5SStephen Smalley pr_err("SELinux: failed to load policy booleans\n"); 5110619f0f5SStephen Smalley return ret; 5120619f0f5SStephen Smalley } 5130619f0f5SStephen Smalley 5140619f0f5SStephen Smalley ret = sel_make_classes(fsi); 5150619f0f5SStephen Smalley if (ret) { 5160619f0f5SStephen Smalley pr_err("SELinux: failed to load policy classes\n"); 5170619f0f5SStephen Smalley return ret; 5180619f0f5SStephen Smalley } 5190619f0f5SStephen Smalley 5200619f0f5SStephen Smalley ret = sel_make_policycap(fsi); 5210619f0f5SStephen Smalley if (ret) { 5220619f0f5SStephen Smalley pr_err("SELinux: failed to load policy capabilities\n"); 5230619f0f5SStephen Smalley return ret; 5240619f0f5SStephen Smalley } 5250619f0f5SStephen Smalley 5260619f0f5SStephen Smalley return 0; 5270619f0f5SStephen Smalley } 5280619f0f5SStephen Smalley 5291da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5301da177e4SLinus Torvalds size_t count, loff_t *ppos) 5311da177e4SLinus Torvalds 5321da177e4SLinus Torvalds { 5330619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5341da177e4SLinus Torvalds ssize_t length; 5351da177e4SLinus Torvalds void *data = NULL; 5361da177e4SLinus Torvalds 5370619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 5381da177e4SLinus Torvalds 5396b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5406b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 541be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); 5421da177e4SLinus Torvalds if (length) 5431da177e4SLinus Torvalds goto out; 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds /* No partial writes. */ 5461da177e4SLinus Torvalds length = -EINVAL; 547b77a493bSEric Paris if (*ppos != 0) 5481da177e4SLinus Torvalds goto out; 5491da177e4SLinus Torvalds 550b77a493bSEric Paris length = -ENOMEM; 551b77a493bSEric Paris data = vmalloc(count); 552b77a493bSEric Paris if (!data) 553b77a493bSEric Paris goto out; 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds length = -EFAULT; 5561da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5571da177e4SLinus Torvalds goto out; 5581da177e4SLinus Torvalds 5590619f0f5SStephen Smalley length = security_load_policy(fsi->state, data, count); 5604262fb51SGary Tierney if (length) { 5614262fb51SGary Tierney pr_warn_ratelimited("SELinux: failed to load policy\n"); 5621da177e4SLinus Torvalds goto out; 5634262fb51SGary Tierney } 5641da177e4SLinus Torvalds 5650619f0f5SStephen Smalley length = sel_make_policy_nodes(fsi); 5660619f0f5SStephen Smalley if (length) 567e47c8fc5SChristopher J. PeBenito goto out1; 568b77a493bSEric Paris 5691da177e4SLinus Torvalds length = count; 570e47c8fc5SChristopher J. PeBenito 571e47c8fc5SChristopher J. PeBenito out1: 572cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 573d141136fSRichard Guy Briggs "auid=%u ses=%u lsm=selinux res=1", 574581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5754746ec5bSEric Paris audit_get_sessionid(current)); 5761da177e4SLinus Torvalds out: 5770619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 5781da177e4SLinus Torvalds vfree(data); 5791da177e4SLinus Torvalds return length; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5829c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5831da177e4SLinus Torvalds .write = sel_write_load, 58457a62c23SArnd Bergmann .llseek = generic_file_llseek, 5851da177e4SLinus Torvalds }; 5861da177e4SLinus Torvalds 587ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5881da177e4SLinus Torvalds { 5890619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5900619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 591b77a493bSEric Paris char *canon = NULL; 592ce9982d0SStephen Smalley u32 sid, len; 5931da177e4SLinus Torvalds ssize_t length; 5941da177e4SLinus Torvalds 5956b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5966b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 597be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); 5981da177e4SLinus Torvalds if (length) 599b77a493bSEric Paris goto out; 6001da177e4SLinus Torvalds 6010619f0f5SStephen Smalley length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); 602b77a493bSEric Paris if (length) 603b77a493bSEric Paris goto out; 6041da177e4SLinus Torvalds 6050619f0f5SStephen Smalley length = security_sid_to_context(state, sid, &canon, &len); 606b77a493bSEric Paris if (length) 607b77a493bSEric Paris goto out; 608ce9982d0SStephen Smalley 609b77a493bSEric Paris length = -ERANGE; 610ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 611f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 612744ba35eSEric Paris "payload max\n", __func__, len); 613ce9982d0SStephen Smalley goto out; 614ce9982d0SStephen Smalley } 615ce9982d0SStephen Smalley 616ce9982d0SStephen Smalley memcpy(buf, canon, len); 617ce9982d0SStephen Smalley length = len; 6181da177e4SLinus Torvalds out: 619ce9982d0SStephen Smalley kfree(canon); 6201da177e4SLinus Torvalds return length; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds 6231da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6241da177e4SLinus Torvalds size_t count, loff_t *ppos) 6251da177e4SLinus Torvalds { 6260619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 6271da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6281da177e4SLinus Torvalds ssize_t length; 6291da177e4SLinus Torvalds 6300619f0f5SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); 6311da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6351da177e4SLinus Torvalds size_t count, loff_t *ppos) 6361da177e4SLinus Torvalds { 6370619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6388365a719SAl Viro char *page; 6391da177e4SLinus Torvalds ssize_t length; 6401da177e4SLinus Torvalds unsigned int new_value; 6411da177e4SLinus Torvalds 6426b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6436b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 644be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, 645be0554c9SStephen Smalley NULL); 6461da177e4SLinus Torvalds if (length) 6478365a719SAl Viro return length; 6481da177e4SLinus Torvalds 649bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6508365a719SAl Viro return -ENOMEM; 651b77a493bSEric Paris 6521da177e4SLinus Torvalds /* No partial writes. */ 653b77a493bSEric Paris if (*ppos != 0) 6548365a719SAl Viro return -EINVAL; 655b77a493bSEric Paris 6568365a719SAl Viro page = memdup_user_nul(buf, count); 6578365a719SAl Viro if (IS_ERR(page)) 6588365a719SAl Viro return PTR_ERR(page); 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds length = -EINVAL; 6611da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6621da177e4SLinus Torvalds goto out; 6631da177e4SLinus Torvalds 6640619f0f5SStephen Smalley fsi->state->checkreqprot = new_value ? 1 : 0; 6651da177e4SLinus Torvalds length = count; 6661da177e4SLinus Torvalds out: 6678365a719SAl Viro kfree(page); 6681da177e4SLinus Torvalds return length; 6691da177e4SLinus Torvalds } 6709c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6711da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6721da177e4SLinus Torvalds .write = sel_write_checkreqprot, 67357a62c23SArnd Bergmann .llseek = generic_file_llseek, 6741da177e4SLinus Torvalds }; 6751da177e4SLinus Torvalds 676f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 677f9df6458SAndrew Perepechko const char __user *buf, 678f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 679f9df6458SAndrew Perepechko { 6800619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6810619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 682f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 683f9df6458SAndrew Perepechko char *req = NULL; 684f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 685f9df6458SAndrew Perepechko u16 tclass; 686f9df6458SAndrew Perepechko int rc; 687f9df6458SAndrew Perepechko 6886b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 6896b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 690be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); 691f9df6458SAndrew Perepechko if (rc) 692f9df6458SAndrew Perepechko goto out; 693f9df6458SAndrew Perepechko 694f9df6458SAndrew Perepechko rc = -ENOMEM; 695f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 696f9df6458SAndrew Perepechko goto out; 697f9df6458SAndrew Perepechko 698f9df6458SAndrew Perepechko /* No partial writes. */ 699f9df6458SAndrew Perepechko rc = -EINVAL; 700f9df6458SAndrew Perepechko if (*ppos != 0) 701f9df6458SAndrew Perepechko goto out; 702f9df6458SAndrew Perepechko 7030b884d25SAl Viro req = memdup_user_nul(buf, count); 7040b884d25SAl Viro if (IS_ERR(req)) { 7050b884d25SAl Viro rc = PTR_ERR(req); 7060b884d25SAl Viro req = NULL; 707f9df6458SAndrew Perepechko goto out; 7080b884d25SAl Viro } 709f9df6458SAndrew Perepechko 710f9df6458SAndrew Perepechko rc = -ENOMEM; 711f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 712f9df6458SAndrew Perepechko if (!oldcon) 713f9df6458SAndrew Perepechko goto out; 714f9df6458SAndrew Perepechko 715f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 716f9df6458SAndrew Perepechko if (!newcon) 717f9df6458SAndrew Perepechko goto out; 718f9df6458SAndrew Perepechko 719f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 720f9df6458SAndrew Perepechko if (!taskcon) 721f9df6458SAndrew Perepechko goto out; 722f9df6458SAndrew Perepechko 723f9df6458SAndrew Perepechko rc = -EINVAL; 724f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 725f9df6458SAndrew Perepechko goto out; 726f9df6458SAndrew Perepechko 7270619f0f5SStephen Smalley rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); 728f9df6458SAndrew Perepechko if (rc) 729f9df6458SAndrew Perepechko goto out; 730f9df6458SAndrew Perepechko 7310619f0f5SStephen Smalley rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); 732f9df6458SAndrew Perepechko if (rc) 733f9df6458SAndrew Perepechko goto out; 734f9df6458SAndrew Perepechko 7350619f0f5SStephen Smalley rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); 736f9df6458SAndrew Perepechko if (rc) 737f9df6458SAndrew Perepechko goto out; 738f9df6458SAndrew Perepechko 7390619f0f5SStephen Smalley rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); 740f9df6458SAndrew Perepechko if (!rc) 741f9df6458SAndrew Perepechko rc = count; 742f9df6458SAndrew Perepechko out: 743f9df6458SAndrew Perepechko kfree(req); 744f9df6458SAndrew Perepechko kfree(oldcon); 745f9df6458SAndrew Perepechko kfree(newcon); 746f9df6458SAndrew Perepechko kfree(taskcon); 747f9df6458SAndrew Perepechko return rc; 748f9df6458SAndrew Perepechko } 749f9df6458SAndrew Perepechko 750f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 751f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 752f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 753f9df6458SAndrew Perepechko }; 754f9df6458SAndrew Perepechko 7551da177e4SLinus Torvalds /* 7561da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7571da177e4SLinus Torvalds */ 7581da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7591da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7601da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7611da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7621da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7631da177e4SLinus Torvalds 764631d2b49SEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 7651da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7661da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7671da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7681da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7691da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 770ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7711da177e4SLinus Torvalds }; 7721da177e4SLinus Torvalds 7731da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7741da177e4SLinus Torvalds { 775496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7761da177e4SLinus Torvalds char *data; 7771da177e4SLinus Torvalds ssize_t rv; 7781da177e4SLinus Torvalds 7796e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7801da177e4SLinus Torvalds return -EINVAL; 7811da177e4SLinus Torvalds 7821da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7831da177e4SLinus Torvalds if (IS_ERR(data)) 7841da177e4SLinus Torvalds return PTR_ERR(data); 7851da177e4SLinus Torvalds 7861da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 7871da177e4SLinus Torvalds if (rv > 0) { 7881da177e4SLinus Torvalds simple_transaction_set(file, rv); 7891da177e4SLinus Torvalds rv = size; 7901da177e4SLinus Torvalds } 7911da177e4SLinus Torvalds return rv; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 7949c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 7951da177e4SLinus Torvalds .write = selinux_transaction_write, 7961da177e4SLinus Torvalds .read = simple_transaction_read, 7971da177e4SLinus Torvalds .release = simple_transaction_release, 79857a62c23SArnd Bergmann .llseek = generic_file_llseek, 7991da177e4SLinus Torvalds }; 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds /* 8021da177e4SLinus Torvalds * payload - write methods 8031da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 8041da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 8051da177e4SLinus Torvalds */ 8061da177e4SLinus Torvalds 8071da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 8081da177e4SLinus Torvalds { 8090619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8100619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 811b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8121da177e4SLinus Torvalds u32 ssid, tsid; 8131da177e4SLinus Torvalds u16 tclass; 8141da177e4SLinus Torvalds struct av_decision avd; 8151da177e4SLinus Torvalds ssize_t length; 8161da177e4SLinus Torvalds 8176b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8186b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 819be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); 8201da177e4SLinus Torvalds if (length) 821b77a493bSEric Paris goto out; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds length = -ENOMEM; 82489d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8251da177e4SLinus Torvalds if (!scon) 826b77a493bSEric Paris goto out; 8271da177e4SLinus Torvalds 828b77a493bSEric Paris length = -ENOMEM; 82989d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8301da177e4SLinus Torvalds if (!tcon) 8311da177e4SLinus Torvalds goto out; 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds length = -EINVAL; 83419439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 835b77a493bSEric Paris goto out; 8361da177e4SLinus Torvalds 8370619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 838b77a493bSEric Paris if (length) 839b77a493bSEric Paris goto out; 840b77a493bSEric Paris 8410619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 842b77a493bSEric Paris if (length) 843b77a493bSEric Paris goto out; 8441da177e4SLinus Torvalds 8450619f0f5SStephen Smalley security_compute_av_user(state, ssid, tsid, tclass, &avd); 8461da177e4SLinus Torvalds 8471da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8488a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 849f1c6381aSEric Paris avd.allowed, 0xffffffff, 8501da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8518a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8521da177e4SLinus Torvalds out: 853b77a493bSEric Paris kfree(tcon); 8541da177e4SLinus Torvalds kfree(scon); 8551da177e4SLinus Torvalds return length; 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8591da177e4SLinus Torvalds { 8600619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8610619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 862b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 863f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8641da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8651da177e4SLinus Torvalds u16 tclass; 8661da177e4SLinus Torvalds ssize_t length; 867b77a493bSEric Paris char *newcon = NULL; 8681da177e4SLinus Torvalds u32 len; 869f50a3ec9SKohei Kaigai int nargs; 8701da177e4SLinus Torvalds 8716b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8726b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 873be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, 874be0554c9SStephen Smalley NULL); 8751da177e4SLinus Torvalds if (length) 876b77a493bSEric Paris goto out; 8771da177e4SLinus Torvalds 8781da177e4SLinus Torvalds length = -ENOMEM; 87989d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8801da177e4SLinus Torvalds if (!scon) 881b77a493bSEric Paris goto out; 8821da177e4SLinus Torvalds 883b77a493bSEric Paris length = -ENOMEM; 88489d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8851da177e4SLinus Torvalds if (!tcon) 8861da177e4SLinus Torvalds goto out; 8871da177e4SLinus Torvalds 888f50a3ec9SKohei Kaigai length = -ENOMEM; 889f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 890f50a3ec9SKohei Kaigai if (!namebuf) 891b77a493bSEric Paris goto out; 8921da177e4SLinus Torvalds 893f50a3ec9SKohei Kaigai length = -EINVAL; 894f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 895f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 896f50a3ec9SKohei Kaigai goto out; 8970f7e4c33SKohei Kaigai if (nargs == 4) { 8980f7e4c33SKohei Kaigai /* 8990f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 9000f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 9010f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 9020f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 9030f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 9040f7e4c33SKohei Kaigai */ 9050f7e4c33SKohei Kaigai char *r, *w; 9060f7e4c33SKohei Kaigai int c1, c2; 9070f7e4c33SKohei Kaigai 9080f7e4c33SKohei Kaigai r = w = namebuf; 9090f7e4c33SKohei Kaigai do { 9100f7e4c33SKohei Kaigai c1 = *r++; 9110f7e4c33SKohei Kaigai if (c1 == '+') 9120f7e4c33SKohei Kaigai c1 = ' '; 9130f7e4c33SKohei Kaigai else if (c1 == '%') { 914af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 915af7ff2c2SAndy Shevchenko if (c1 < 0) 9160f7e4c33SKohei Kaigai goto out; 917af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 918af7ff2c2SAndy Shevchenko if (c2 < 0) 9190f7e4c33SKohei Kaigai goto out; 9200f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 9210f7e4c33SKohei Kaigai } 9220f7e4c33SKohei Kaigai *w++ = c1; 9230f7e4c33SKohei Kaigai } while (c1 != '\0'); 9240f7e4c33SKohei Kaigai 925f50a3ec9SKohei Kaigai objname = namebuf; 9260f7e4c33SKohei Kaigai } 927f50a3ec9SKohei Kaigai 9280619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 929b77a493bSEric Paris if (length) 930b77a493bSEric Paris goto out; 931b77a493bSEric Paris 9320619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 933b77a493bSEric Paris if (length) 934b77a493bSEric Paris goto out; 9351da177e4SLinus Torvalds 9360619f0f5SStephen Smalley length = security_transition_sid_user(state, ssid, tsid, tclass, 9370619f0f5SStephen Smalley objname, &newsid); 938b77a493bSEric Paris if (length) 939b77a493bSEric Paris goto out; 9401da177e4SLinus Torvalds 9410619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 942b77a493bSEric Paris if (length) 943b77a493bSEric Paris goto out; 9441da177e4SLinus Torvalds 945b77a493bSEric Paris length = -ERANGE; 9461da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 947f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 948744ba35eSEric Paris "payload max\n", __func__, len); 949b77a493bSEric Paris goto out; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds memcpy(buf, newcon, len); 9531da177e4SLinus Torvalds length = len; 9541da177e4SLinus Torvalds out: 955b77a493bSEric Paris kfree(newcon); 956f50a3ec9SKohei Kaigai kfree(namebuf); 957b77a493bSEric Paris kfree(tcon); 9581da177e4SLinus Torvalds kfree(scon); 9591da177e4SLinus Torvalds return length; 9601da177e4SLinus Torvalds } 9611da177e4SLinus Torvalds 9621da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9631da177e4SLinus Torvalds { 9640619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 9650619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 966b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9671da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9681da177e4SLinus Torvalds u16 tclass; 9691da177e4SLinus Torvalds ssize_t length; 970b77a493bSEric Paris char *newcon = NULL; 9711da177e4SLinus Torvalds u32 len; 9721da177e4SLinus Torvalds 9736b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 9746b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 975be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, 976be0554c9SStephen Smalley NULL); 9771da177e4SLinus Torvalds if (length) 978b77a493bSEric Paris goto out; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds length = -ENOMEM; 98189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9821da177e4SLinus Torvalds if (!scon) 983b77a493bSEric Paris goto out; 9841da177e4SLinus Torvalds 985b77a493bSEric Paris length = -ENOMEM; 98689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9871da177e4SLinus Torvalds if (!tcon) 9881da177e4SLinus Torvalds goto out; 9891da177e4SLinus Torvalds 9901da177e4SLinus Torvalds length = -EINVAL; 9911da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 992b77a493bSEric Paris goto out; 9931da177e4SLinus Torvalds 9940619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 995b77a493bSEric Paris if (length) 996b77a493bSEric Paris goto out; 997b77a493bSEric Paris 9980619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 999b77a493bSEric Paris if (length) 1000b77a493bSEric Paris goto out; 10011da177e4SLinus Torvalds 10020619f0f5SStephen Smalley length = security_change_sid(state, ssid, tsid, tclass, &newsid); 1003b77a493bSEric Paris if (length) 1004b77a493bSEric Paris goto out; 10051da177e4SLinus Torvalds 10060619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1007b77a493bSEric Paris if (length) 1008b77a493bSEric Paris goto out; 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds length = -ERANGE; 1011b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 1012b77a493bSEric Paris goto out; 10131da177e4SLinus Torvalds 10141da177e4SLinus Torvalds memcpy(buf, newcon, len); 10151da177e4SLinus Torvalds length = len; 10161da177e4SLinus Torvalds out: 1017b77a493bSEric Paris kfree(newcon); 1018b77a493bSEric Paris kfree(tcon); 10191da177e4SLinus Torvalds kfree(scon); 10201da177e4SLinus Torvalds return length; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 10241da177e4SLinus Torvalds { 10250619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10260619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1027b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 1028b77a493bSEric Paris u32 sid, *sids = NULL; 10291da177e4SLinus Torvalds ssize_t length; 10301da177e4SLinus Torvalds char *newcon; 10311da177e4SLinus Torvalds int i, rc; 10321da177e4SLinus Torvalds u32 len, nsids; 10331da177e4SLinus Torvalds 10346b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 10356b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1036be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_USER, 1037be0554c9SStephen Smalley NULL); 10381da177e4SLinus Torvalds if (length) 10396eab04a8SJustin P. Mattock goto out; 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds length = -ENOMEM; 104289d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 10431da177e4SLinus Torvalds if (!con) 10446eab04a8SJustin P. Mattock goto out; 10451da177e4SLinus Torvalds 1046b77a493bSEric Paris length = -ENOMEM; 104789d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 10481da177e4SLinus Torvalds if (!user) 10491da177e4SLinus Torvalds goto out; 10501da177e4SLinus Torvalds 10511da177e4SLinus Torvalds length = -EINVAL; 10521da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 1053b77a493bSEric Paris goto out; 10541da177e4SLinus Torvalds 10550619f0f5SStephen Smalley length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); 1056b77a493bSEric Paris if (length) 1057b77a493bSEric Paris goto out; 10581da177e4SLinus Torvalds 10590619f0f5SStephen Smalley length = security_get_user_sids(state, sid, user, &sids, &nsids); 1060b77a493bSEric Paris if (length) 1061b77a493bSEric Paris goto out; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10641da177e4SLinus Torvalds ptr = buf + length; 10651da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10660619f0f5SStephen Smalley rc = security_sid_to_context(state, sids[i], &newcon, &len); 10671da177e4SLinus Torvalds if (rc) { 10681da177e4SLinus Torvalds length = rc; 1069b77a493bSEric Paris goto out; 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10721da177e4SLinus Torvalds kfree(newcon); 10731da177e4SLinus Torvalds length = -ERANGE; 1074b77a493bSEric Paris goto out; 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10771da177e4SLinus Torvalds kfree(newcon); 10781da177e4SLinus Torvalds ptr += len; 10791da177e4SLinus Torvalds length += len; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds out: 1082b77a493bSEric Paris kfree(sids); 1083b77a493bSEric Paris kfree(user); 10841da177e4SLinus Torvalds kfree(con); 10851da177e4SLinus Torvalds return length; 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 10891da177e4SLinus Torvalds { 10900619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10910619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1092b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 10931da177e4SLinus Torvalds u32 ssid, tsid, newsid; 10941da177e4SLinus Torvalds u16 tclass; 10951da177e4SLinus Torvalds ssize_t length; 1096b77a493bSEric Paris char *newcon = NULL; 10971da177e4SLinus Torvalds u32 len; 10981da177e4SLinus Torvalds 10996b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 11006b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1101be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, 1102be0554c9SStephen Smalley NULL); 11031da177e4SLinus Torvalds if (length) 1104b77a493bSEric Paris goto out; 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds length = -ENOMEM; 110789d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 11081da177e4SLinus Torvalds if (!scon) 11096eab04a8SJustin P. Mattock goto out; 11101da177e4SLinus Torvalds 1111b77a493bSEric Paris length = -ENOMEM; 111289d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 11131da177e4SLinus Torvalds if (!tcon) 11141da177e4SLinus Torvalds goto out; 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds length = -EINVAL; 11171da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1118b77a493bSEric Paris goto out; 11191da177e4SLinus Torvalds 11200619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1121b77a493bSEric Paris if (length) 1122b77a493bSEric Paris goto out; 1123b77a493bSEric Paris 11240619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1125b77a493bSEric Paris if (length) 1126b77a493bSEric Paris goto out; 11271da177e4SLinus Torvalds 11280619f0f5SStephen Smalley length = security_member_sid(state, ssid, tsid, tclass, &newsid); 1129b77a493bSEric Paris if (length) 1130b77a493bSEric Paris goto out; 11311da177e4SLinus Torvalds 11320619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1133b77a493bSEric Paris if (length) 1134b77a493bSEric Paris goto out; 11351da177e4SLinus Torvalds 1136b77a493bSEric Paris length = -ERANGE; 11371da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1138f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 1139744ba35eSEric Paris "payload max\n", __func__, len); 1140b77a493bSEric Paris goto out; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds memcpy(buf, newcon, len); 11441da177e4SLinus Torvalds length = len; 11451da177e4SLinus Torvalds out: 1146b77a493bSEric Paris kfree(newcon); 1147b77a493bSEric Paris kfree(tcon); 11481da177e4SLinus Torvalds kfree(scon); 11491da177e4SLinus Torvalds return length; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 11531da177e4SLinus Torvalds { 11541da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds if (ret) { 11571da177e4SLinus Torvalds ret->i_mode = mode; 1158078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds return ret; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 11641da177e4SLinus Torvalds size_t count, loff_t *ppos) 11651da177e4SLinus Torvalds { 11660619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 11671da177e4SLinus Torvalds char *page = NULL; 11681da177e4SLinus Torvalds ssize_t length; 11691da177e4SLinus Torvalds ssize_t ret; 11701da177e4SLinus Torvalds int cur_enforcing; 1171496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1172d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11731da177e4SLinus Torvalds 11740619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 11751da177e4SLinus Torvalds 1176d313f948SStephen Smalley ret = -EINVAL; 11770619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 11780619f0f5SStephen Smalley fsi->bool_pending_names[index])) 11790da74120SJann Horn goto out_unlock; 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds ret = -ENOMEM; 1182b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1183b77a493bSEric Paris if (!page) 11840da74120SJann Horn goto out_unlock; 11851da177e4SLinus Torvalds 11860619f0f5SStephen Smalley cur_enforcing = security_get_bool_value(fsi->state, index); 11871da177e4SLinus Torvalds if (cur_enforcing < 0) { 11881da177e4SLinus Torvalds ret = cur_enforcing; 11890da74120SJann Horn goto out_unlock; 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 11920619f0f5SStephen Smalley fsi->bool_pending_values[index]); 11930619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 11940da74120SJann Horn ret = simple_read_from_buffer(buf, count, ppos, page, length); 11950da74120SJann Horn out_free: 11961da177e4SLinus Torvalds free_page((unsigned long)page); 11971da177e4SLinus Torvalds return ret; 11980da74120SJann Horn 11990da74120SJann Horn out_unlock: 12000da74120SJann Horn mutex_unlock(&fsi->mutex); 12010da74120SJann Horn goto out_free; 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds 12041da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 12051da177e4SLinus Torvalds size_t count, loff_t *ppos) 12061da177e4SLinus Torvalds { 12070619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12081da177e4SLinus Torvalds char *page = NULL; 1209d313f948SStephen Smalley ssize_t length; 12101da177e4SLinus Torvalds int new_value; 1211496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1212d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 12131da177e4SLinus Torvalds 12140da74120SJann Horn if (count >= PAGE_SIZE) 12150da74120SJann Horn return -ENOMEM; 12160da74120SJann Horn 12170da74120SJann Horn /* No partial writes. */ 12180da74120SJann Horn if (*ppos != 0) 12190da74120SJann Horn return -EINVAL; 12200da74120SJann Horn 12210da74120SJann Horn page = memdup_user_nul(buf, count); 12220da74120SJann Horn if (IS_ERR(page)) 12230da74120SJann Horn return PTR_ERR(page); 12240da74120SJann Horn 12250619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12261da177e4SLinus Torvalds 12276b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12286b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1229be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1230be0554c9SStephen Smalley NULL); 12311da177e4SLinus Torvalds if (length) 12321da177e4SLinus Torvalds goto out; 12331da177e4SLinus Torvalds 1234d313f948SStephen Smalley length = -EINVAL; 12350619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 12360619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1237d313f948SStephen Smalley goto out; 1238d313f948SStephen Smalley 12391da177e4SLinus Torvalds length = -EINVAL; 12401da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12411da177e4SLinus Torvalds goto out; 12421da177e4SLinus Torvalds 12431da177e4SLinus Torvalds if (new_value) 12441da177e4SLinus Torvalds new_value = 1; 12451da177e4SLinus Torvalds 12460619f0f5SStephen Smalley fsi->bool_pending_values[index] = new_value; 12471da177e4SLinus Torvalds length = count; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds out: 12500619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12518365a719SAl Viro kfree(page); 12521da177e4SLinus Torvalds return length; 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds 12559c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 12561da177e4SLinus Torvalds .read = sel_read_bool, 12571da177e4SLinus Torvalds .write = sel_write_bool, 125857a62c23SArnd Bergmann .llseek = generic_file_llseek, 12591da177e4SLinus Torvalds }; 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 12621da177e4SLinus Torvalds const char __user *buf, 12631da177e4SLinus Torvalds size_t count, loff_t *ppos) 12641da177e4SLinus Torvalds { 12650619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12661da177e4SLinus Torvalds char *page = NULL; 1267d313f948SStephen Smalley ssize_t length; 12681da177e4SLinus Torvalds int new_value; 12691da177e4SLinus Torvalds 12700da74120SJann Horn if (count >= PAGE_SIZE) 12710da74120SJann Horn return -ENOMEM; 12720da74120SJann Horn 12730da74120SJann Horn /* No partial writes. */ 12740da74120SJann Horn if (*ppos != 0) 12750da74120SJann Horn return -EINVAL; 12760da74120SJann Horn 12770da74120SJann Horn page = memdup_user_nul(buf, count); 12780da74120SJann Horn if (IS_ERR(page)) 12790da74120SJann Horn return PTR_ERR(page); 12800da74120SJann Horn 12810619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12821da177e4SLinus Torvalds 12836b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12846b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1285be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1286be0554c9SStephen Smalley NULL); 12871da177e4SLinus Torvalds if (length) 12881da177e4SLinus Torvalds goto out; 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds length = -EINVAL; 12911da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12921da177e4SLinus Torvalds goto out; 12931da177e4SLinus Torvalds 1294b77a493bSEric Paris length = 0; 12950619f0f5SStephen Smalley if (new_value && fsi->bool_pending_values) 12960619f0f5SStephen Smalley length = security_set_bools(fsi->state, fsi->bool_num, 12970619f0f5SStephen Smalley fsi->bool_pending_values); 12981da177e4SLinus Torvalds 1299b77a493bSEric Paris if (!length) 13001da177e4SLinus Torvalds length = count; 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds out: 13030619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 13048365a719SAl Viro kfree(page); 13051da177e4SLinus Torvalds return length; 13061da177e4SLinus Torvalds } 13071da177e4SLinus Torvalds 13089c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 13091da177e4SLinus Torvalds .write = sel_commit_bools_write, 131057a62c23SArnd Bergmann .llseek = generic_file_llseek, 13111da177e4SLinus Torvalds }; 13121da177e4SLinus Torvalds 13130c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 13141da177e4SLinus Torvalds { 1315ad52184bSAl Viro d_genocide(de); 1316ad52184bSAl Viro shrink_dcache_parent(de); 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds 13191da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 13201da177e4SLinus Torvalds 13210619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi) 13221da177e4SLinus Torvalds { 1323b77a493bSEric Paris int i, ret; 13241da177e4SLinus Torvalds ssize_t len; 13251da177e4SLinus Torvalds struct dentry *dentry = NULL; 13260619f0f5SStephen Smalley struct dentry *dir = fsi->bool_dir; 13271da177e4SLinus Torvalds struct inode *inode = NULL; 13281da177e4SLinus Torvalds struct inode_security_struct *isec; 13291da177e4SLinus Torvalds char **names = NULL, *page; 13301da177e4SLinus Torvalds int num; 13311da177e4SLinus Torvalds int *values = NULL; 13321da177e4SLinus Torvalds u32 sid; 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds /* remove any existing files */ 13350619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 13360619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 13370619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 13380619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 13390619f0f5SStephen Smalley fsi->bool_num = 0; 13400619f0f5SStephen Smalley fsi->bool_pending_names = NULL; 13410619f0f5SStephen Smalley fsi->bool_pending_values = NULL; 13421da177e4SLinus Torvalds 13430c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 13441da177e4SLinus Torvalds 1345b77a493bSEric Paris ret = -ENOMEM; 13461872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 13471872981bSEric Paris if (!page) 1348b77a493bSEric Paris goto out; 13491da177e4SLinus Torvalds 13500619f0f5SStephen Smalley ret = security_get_bools(fsi->state, &num, &names, &values); 1351b77a493bSEric Paris if (ret) 13521da177e4SLinus Torvalds goto out; 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1355b77a493bSEric Paris ret = -ENOMEM; 13561da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1357b77a493bSEric Paris if (!dentry) 1358b77a493bSEric Paris goto out; 13591da177e4SLinus Torvalds 1360b77a493bSEric Paris ret = -ENOMEM; 1361b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 13627e4237faSnixiaoming if (!inode) { 13637e4237faSnixiaoming dput(dentry); 1364b77a493bSEric Paris goto out; 13657e4237faSnixiaoming } 1366b77a493bSEric Paris 13671da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1368cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 13697e4237faSnixiaoming if (len >= PAGE_SIZE) { 13707e4237faSnixiaoming dput(dentry); 13717e4237faSnixiaoming iput(inode); 1372b77a493bSEric Paris goto out; 13737e4237faSnixiaoming } 1374b77a493bSEric Paris 137580788c22SCasey Schaufler isec = selinux_inode(inode); 13760619f0f5SStephen Smalley ret = security_genfs_sid(fsi->state, "selinuxfs", page, 1377aa8e712cSStephen Smalley SECCLASS_FILE, &sid); 13784262fb51SGary Tierney if (ret) { 1379900fde06SGary Tierney pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", 1380900fde06SGary Tierney page); 1381900fde06SGary Tierney sid = SECINITSID_SECURITY; 13824262fb51SGary Tierney } 13834262fb51SGary Tierney 13841da177e4SLinus Torvalds isec->sid = sid; 138542059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 13861da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1387bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 13881da177e4SLinus Torvalds d_add(dentry, inode); 13891da177e4SLinus Torvalds } 13900619f0f5SStephen Smalley fsi->bool_num = num; 13910619f0f5SStephen Smalley fsi->bool_pending_names = names; 13920619f0f5SStephen Smalley fsi->bool_pending_values = values; 1393b77a493bSEric Paris 1394b77a493bSEric Paris free_page((unsigned long)page); 1395b77a493bSEric Paris return 0; 13961da177e4SLinus Torvalds out: 13971da177e4SLinus Torvalds free_page((unsigned long)page); 1398b77a493bSEric Paris 13991da177e4SLinus Torvalds if (names) { 14009a5f04bfSJesper Juhl for (i = 0; i < num; i++) 14011da177e4SLinus Torvalds kfree(names[i]); 14021da177e4SLinus Torvalds kfree(names); 14031da177e4SLinus Torvalds } 140420c19e41SDavi Arnaut kfree(values); 14050c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1406b77a493bSEric Paris 1407b77a493bSEric Paris return ret; 14081da177e4SLinus Torvalds } 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 14111da177e4SLinus Torvalds size_t count, loff_t *ppos) 14121da177e4SLinus Torvalds { 14136b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14146b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14151da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 14161da177e4SLinus Torvalds ssize_t length; 14171da177e4SLinus Torvalds 14186b6bc620SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 14196b6bc620SStephen Smalley avc_get_cache_threshold(state->avc)); 14201da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 14211da177e4SLinus Torvalds } 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 14241da177e4SLinus Torvalds const char __user *buf, 14251da177e4SLinus Torvalds size_t count, loff_t *ppos) 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds { 14286b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 14296b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14308365a719SAl Viro char *page; 14311da177e4SLinus Torvalds ssize_t ret; 1432309c5fadSHeinrich Schuchardt unsigned int new_value; 14331da177e4SLinus Torvalds 14346b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 14356b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1436be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETSECPARAM, 1437be0554c9SStephen Smalley NULL); 14381da177e4SLinus Torvalds if (ret) 14398365a719SAl Viro return ret; 1440b77a493bSEric Paris 1441b77a493bSEric Paris if (count >= PAGE_SIZE) 14428365a719SAl Viro return -ENOMEM; 1443b77a493bSEric Paris 1444b77a493bSEric Paris /* No partial writes. */ 1445b77a493bSEric Paris if (*ppos != 0) 14468365a719SAl Viro return -EINVAL; 1447b77a493bSEric Paris 14488365a719SAl Viro page = memdup_user_nul(buf, count); 14498365a719SAl Viro if (IS_ERR(page)) 14508365a719SAl Viro return PTR_ERR(page); 1451b77a493bSEric Paris 1452b77a493bSEric Paris ret = -EINVAL; 1453b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1454b77a493bSEric Paris goto out; 1455b77a493bSEric Paris 14566b6bc620SStephen Smalley avc_set_cache_threshold(state->avc, new_value); 1457b77a493bSEric Paris 14581da177e4SLinus Torvalds ret = count; 14591da177e4SLinus Torvalds out: 14608365a719SAl Viro kfree(page); 14611da177e4SLinus Torvalds return ret; 14621da177e4SLinus Torvalds } 14631da177e4SLinus Torvalds 14641da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 14651da177e4SLinus Torvalds size_t count, loff_t *ppos) 14661da177e4SLinus Torvalds { 14676b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14686b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14691da177e4SLinus Torvalds char *page; 1470b77a493bSEric Paris ssize_t length; 14711da177e4SLinus Torvalds 14721da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1473b77a493bSEric Paris if (!page) 1474b77a493bSEric Paris return -ENOMEM; 1475b77a493bSEric Paris 14766b6bc620SStephen Smalley length = avc_get_hash_stats(state->avc, page); 1477b77a493bSEric Paris if (length >= 0) 1478b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 14791da177e4SLinus Torvalds free_page((unsigned long)page); 1480b77a493bSEric Paris 1481b77a493bSEric Paris return length; 14821da177e4SLinus Torvalds } 14831da177e4SLinus Torvalds 148466f8e2f0SJeff Vander Stoep static ssize_t sel_read_sidtab_hash_stats(struct file *filp, char __user *buf, 148566f8e2f0SJeff Vander Stoep size_t count, loff_t *ppos) 148666f8e2f0SJeff Vander Stoep { 148766f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 148866f8e2f0SJeff Vander Stoep struct selinux_state *state = fsi->state; 148966f8e2f0SJeff Vander Stoep char *page; 149066f8e2f0SJeff Vander Stoep ssize_t length; 149166f8e2f0SJeff Vander Stoep 149266f8e2f0SJeff Vander Stoep page = (char *)__get_free_page(GFP_KERNEL); 149366f8e2f0SJeff Vander Stoep if (!page) 149466f8e2f0SJeff Vander Stoep return -ENOMEM; 149566f8e2f0SJeff Vander Stoep 149666f8e2f0SJeff Vander Stoep length = security_sidtab_hash_stats(state, page); 149766f8e2f0SJeff Vander Stoep if (length >= 0) 149866f8e2f0SJeff Vander Stoep length = simple_read_from_buffer(buf, count, ppos, page, 149966f8e2f0SJeff Vander Stoep length); 150066f8e2f0SJeff Vander Stoep free_page((unsigned long)page); 150166f8e2f0SJeff Vander Stoep 150266f8e2f0SJeff Vander Stoep return length; 150366f8e2f0SJeff Vander Stoep } 150466f8e2f0SJeff Vander Stoep 150566f8e2f0SJeff Vander Stoep static const struct file_operations sel_sidtab_hash_stats_ops = { 150666f8e2f0SJeff Vander Stoep .read = sel_read_sidtab_hash_stats, 150766f8e2f0SJeff Vander Stoep .llseek = generic_file_llseek, 150866f8e2f0SJeff Vander Stoep }; 150966f8e2f0SJeff Vander Stoep 15109c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 15111da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 15121da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 151357a62c23SArnd Bergmann .llseek = generic_file_llseek, 15141da177e4SLinus Torvalds }; 15151da177e4SLinus Torvalds 15169c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 15171da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 151857a62c23SArnd Bergmann .llseek = generic_file_llseek, 15191da177e4SLinus Torvalds }; 15201da177e4SLinus Torvalds 15211da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15221da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 15231da177e4SLinus Torvalds { 15241da177e4SLinus Torvalds int cpu; 15251da177e4SLinus Torvalds 15264f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 15271da177e4SLinus Torvalds if (!cpu_possible(cpu)) 15281da177e4SLinus Torvalds continue; 15291da177e4SLinus Torvalds *idx = cpu + 1; 15301da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 15311da177e4SLinus Torvalds } 15321da177e4SLinus Torvalds return NULL; 15331da177e4SLinus Torvalds } 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 15361da177e4SLinus Torvalds { 15371da177e4SLinus Torvalds loff_t n = *pos - 1; 15381da177e4SLinus Torvalds 15391da177e4SLinus Torvalds if (*pos == 0) 15401da177e4SLinus Torvalds return SEQ_START_TOKEN; 15411da177e4SLinus Torvalds 15421da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 15431da177e4SLinus Torvalds } 15441da177e4SLinus Torvalds 15451da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 15461da177e4SLinus Torvalds { 15471da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 15481da177e4SLinus Torvalds } 15491da177e4SLinus Torvalds 15501da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 15511da177e4SLinus Torvalds { 15521da177e4SLinus Torvalds struct avc_cache_stats *st = v; 15531da177e4SLinus Torvalds 1554710a0647SMarkus Elfring if (v == SEQ_START_TOKEN) { 1555710a0647SMarkus Elfring seq_puts(seq, 1556710a0647SMarkus Elfring "lookups hits misses allocations reclaims frees\n"); 1557710a0647SMarkus Elfring } else { 1558257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1559257313b2SLinus Torvalds unsigned int misses = st->misses; 1560257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1561257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1562257313b2SLinus Torvalds hits, misses, st->allocations, 15631da177e4SLinus Torvalds st->reclaims, st->frees); 1564257313b2SLinus Torvalds } 15651da177e4SLinus Torvalds return 0; 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 15691da177e4SLinus Torvalds { } 15701da177e4SLinus Torvalds 15711996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 15721da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 15731da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 15741da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 15751da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 15761da177e4SLinus Torvalds }; 15771da177e4SLinus Torvalds 15781da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 15791da177e4SLinus Torvalds { 15801da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 15811da177e4SLinus Torvalds } 15821da177e4SLinus Torvalds 15839c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 15841da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 15851da177e4SLinus Torvalds .read = seq_read, 15861da177e4SLinus Torvalds .llseek = seq_lseek, 15871da177e4SLinus Torvalds .release = seq_release, 15881da177e4SLinus Torvalds }; 15891da177e4SLinus Torvalds #endif 15901da177e4SLinus Torvalds 15911da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 15921da177e4SLinus Torvalds { 15930619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 15940619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1595b77a493bSEric Paris int i; 1596cda37124SEric Biggers static const struct tree_descr files[] = { 15971da177e4SLinus Torvalds { "cache_threshold", 15981da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 15991da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 16001da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 16011da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 16021da177e4SLinus Torvalds #endif 16031da177e4SLinus Torvalds }; 16041da177e4SLinus Torvalds 16056e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 16061da177e4SLinus Torvalds struct inode *inode; 16071da177e4SLinus Torvalds struct dentry *dentry; 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1610b77a493bSEric Paris if (!dentry) 1611b77a493bSEric Paris return -ENOMEM; 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 16147e4237faSnixiaoming if (!inode) { 16157e4237faSnixiaoming dput(dentry); 1616b77a493bSEric Paris return -ENOMEM; 16177e4237faSnixiaoming } 1618b77a493bSEric Paris 16191da177e4SLinus Torvalds inode->i_fop = files[i].ops; 16200619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 16211da177e4SLinus Torvalds d_add(dentry, inode); 16221da177e4SLinus Torvalds } 1623b77a493bSEric Paris 1624b77a493bSEric Paris return 0; 16251da177e4SLinus Torvalds } 16261da177e4SLinus Torvalds 162766f8e2f0SJeff Vander Stoep static int sel_make_ss_files(struct dentry *dir) 162866f8e2f0SJeff Vander Stoep { 162966f8e2f0SJeff Vander Stoep struct super_block *sb = dir->d_sb; 163066f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = sb->s_fs_info; 163166f8e2f0SJeff Vander Stoep int i; 163266f8e2f0SJeff Vander Stoep static struct tree_descr files[] = { 163366f8e2f0SJeff Vander Stoep { "sidtab_hash_stats", &sel_sidtab_hash_stats_ops, S_IRUGO }, 163466f8e2f0SJeff Vander Stoep }; 163566f8e2f0SJeff Vander Stoep 163666f8e2f0SJeff Vander Stoep for (i = 0; i < ARRAY_SIZE(files); i++) { 163766f8e2f0SJeff Vander Stoep struct inode *inode; 163866f8e2f0SJeff Vander Stoep struct dentry *dentry; 163966f8e2f0SJeff Vander Stoep 164066f8e2f0SJeff Vander Stoep dentry = d_alloc_name(dir, files[i].name); 164166f8e2f0SJeff Vander Stoep if (!dentry) 164266f8e2f0SJeff Vander Stoep return -ENOMEM; 164366f8e2f0SJeff Vander Stoep 164466f8e2f0SJeff Vander Stoep inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 164566f8e2f0SJeff Vander Stoep if (!inode) { 164666f8e2f0SJeff Vander Stoep dput(dentry); 164766f8e2f0SJeff Vander Stoep return -ENOMEM; 164866f8e2f0SJeff Vander Stoep } 164966f8e2f0SJeff Vander Stoep 165066f8e2f0SJeff Vander Stoep inode->i_fop = files[i].ops; 165166f8e2f0SJeff Vander Stoep inode->i_ino = ++fsi->last_ino; 165266f8e2f0SJeff Vander Stoep d_add(dentry, inode); 165366f8e2f0SJeff Vander Stoep } 165466f8e2f0SJeff Vander Stoep 165566f8e2f0SJeff Vander Stoep return 0; 165666f8e2f0SJeff Vander Stoep } 165766f8e2f0SJeff Vander Stoep 1658f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1659f0ee2e46SJames Carter size_t count, loff_t *ppos) 1660f0ee2e46SJames Carter { 16610619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1662f0ee2e46SJames Carter char *con; 1663f0ee2e46SJames Carter u32 sid, len; 1664f0ee2e46SJames Carter ssize_t ret; 1665f0ee2e46SJames Carter 1666496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 16670619f0f5SStephen Smalley ret = security_sid_to_context(fsi->state, sid, &con, &len); 1668b77a493bSEric Paris if (ret) 1669f0ee2e46SJames Carter return ret; 1670f0ee2e46SJames Carter 1671f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1672f0ee2e46SJames Carter kfree(con); 1673f0ee2e46SJames Carter return ret; 1674f0ee2e46SJames Carter } 1675f0ee2e46SJames Carter 1676f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1677f0ee2e46SJames Carter .read = sel_read_initcon, 167857a62c23SArnd Bergmann .llseek = generic_file_llseek, 1679f0ee2e46SJames Carter }; 1680f0ee2e46SJames Carter 1681f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1682f0ee2e46SJames Carter { 1683b77a493bSEric Paris int i; 1684f0ee2e46SJames Carter 1685f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1686f0ee2e46SJames Carter struct inode *inode; 1687f0ee2e46SJames Carter struct dentry *dentry; 1688f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1689b77a493bSEric Paris if (!dentry) 1690b77a493bSEric Paris return -ENOMEM; 1691f0ee2e46SJames Carter 1692f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 16937e4237faSnixiaoming if (!inode) { 16947e4237faSnixiaoming dput(dentry); 1695b77a493bSEric Paris return -ENOMEM; 16967e4237faSnixiaoming } 1697b77a493bSEric Paris 1698f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1699f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1700f0ee2e46SJames Carter d_add(dentry, inode); 1701f0ee2e46SJames Carter } 1702b77a493bSEric Paris 1703b77a493bSEric Paris return 0; 1704f0ee2e46SJames Carter } 1705f0ee2e46SJames Carter 1706e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1707e47c8fc5SChristopher J. PeBenito { 1708e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1709e47c8fc5SChristopher J. PeBenito } 1710e47c8fc5SChristopher J. PeBenito 1711e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1712e47c8fc5SChristopher J. PeBenito { 171392ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1714e47c8fc5SChristopher J. PeBenito } 1715e47c8fc5SChristopher J. PeBenito 1716e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1717e47c8fc5SChristopher J. PeBenito { 1718e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1719e47c8fc5SChristopher J. PeBenito } 1720e47c8fc5SChristopher J. PeBenito 1721e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1722e47c8fc5SChristopher J. PeBenito { 1723e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1724e47c8fc5SChristopher J. PeBenito } 1725e47c8fc5SChristopher J. PeBenito 1726e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1727e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1728e47c8fc5SChristopher J. PeBenito { 1729496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1730cc1dad71SAl Viro char res[TMPBUFLEN]; 1731cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1732cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1733e47c8fc5SChristopher J. PeBenito } 1734e47c8fc5SChristopher J. PeBenito 1735e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1736e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 173757a62c23SArnd Bergmann .llseek = generic_file_llseek, 1738e47c8fc5SChristopher J. PeBenito }; 1739e47c8fc5SChristopher J. PeBenito 1740e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1741e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1742e47c8fc5SChristopher J. PeBenito { 1743496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1744cc1dad71SAl Viro char res[TMPBUFLEN]; 1745cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1746cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1747e47c8fc5SChristopher J. PeBenito } 1748e47c8fc5SChristopher J. PeBenito 1749e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1750e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 175157a62c23SArnd Bergmann .llseek = generic_file_llseek, 1752e47c8fc5SChristopher J. PeBenito }; 1753e47c8fc5SChristopher J. PeBenito 17543bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 17553bb56b25SPaul Moore size_t count, loff_t *ppos) 17563bb56b25SPaul Moore { 17570619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 17583bb56b25SPaul Moore int value; 17593bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 17603bb56b25SPaul Moore ssize_t length; 1761496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 17623bb56b25SPaul Moore 17630619f0f5SStephen Smalley value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); 17643bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 17653bb56b25SPaul Moore 17663bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 17673bb56b25SPaul Moore } 17683bb56b25SPaul Moore 17693bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 17703bb56b25SPaul Moore .read = sel_read_policycap, 177157a62c23SArnd Bergmann .llseek = generic_file_llseek, 17723bb56b25SPaul Moore }; 17733bb56b25SPaul Moore 1774e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1775e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1776e47c8fc5SChristopher J. PeBenito { 17770619f0f5SStephen Smalley struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; 1778b77a493bSEric Paris int i, rc, nperms; 1779e47c8fc5SChristopher J. PeBenito char **perms; 1780e47c8fc5SChristopher J. PeBenito 17810619f0f5SStephen Smalley rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); 1782e47c8fc5SChristopher J. PeBenito if (rc) 1783b77a493bSEric Paris return rc; 1784e47c8fc5SChristopher J. PeBenito 1785e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1786e47c8fc5SChristopher J. PeBenito struct inode *inode; 1787e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1788e47c8fc5SChristopher J. PeBenito 1789b77a493bSEric Paris rc = -ENOMEM; 1790e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1791b77a493bSEric Paris if (!dentry) 1792b77a493bSEric Paris goto out; 1793e47c8fc5SChristopher J. PeBenito 1794e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1795b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 17967e4237faSnixiaoming if (!inode) { 17977e4237faSnixiaoming dput(dentry); 1798b77a493bSEric Paris goto out; 17997e4237faSnixiaoming } 1800b77a493bSEric Paris 1801e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1802e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1803e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1804e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1805e47c8fc5SChristopher J. PeBenito } 1806b77a493bSEric Paris rc = 0; 1807b77a493bSEric Paris out: 1808e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1809e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1810e47c8fc5SChristopher J. PeBenito kfree(perms); 1811e47c8fc5SChristopher J. PeBenito return rc; 1812e47c8fc5SChristopher J. PeBenito } 1813e47c8fc5SChristopher J. PeBenito 1814e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1815e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1816e47c8fc5SChristopher J. PeBenito { 18170619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 18180619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1819e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1820e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1821e47c8fc5SChristopher J. PeBenito int rc; 1822e47c8fc5SChristopher J. PeBenito 1823e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1824b77a493bSEric Paris if (!dentry) 1825b77a493bSEric Paris return -ENOMEM; 1826e47c8fc5SChristopher J. PeBenito 1827e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 18287e4237faSnixiaoming if (!inode) { 18297e4237faSnixiaoming dput(dentry); 1830b77a493bSEric Paris return -ENOMEM; 18317e4237faSnixiaoming } 1832e47c8fc5SChristopher J. PeBenito 1833e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1834e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1835e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1836e47c8fc5SChristopher J. PeBenito 18370619f0f5SStephen Smalley dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); 1838a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1839a1c2aa1eSAl Viro return PTR_ERR(dentry); 1840e47c8fc5SChristopher J. PeBenito 1841e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1842e47c8fc5SChristopher J. PeBenito 1843e47c8fc5SChristopher J. PeBenito return rc; 1844e47c8fc5SChristopher J. PeBenito } 1845e47c8fc5SChristopher J. PeBenito 18460619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi) 1847e47c8fc5SChristopher J. PeBenito { 18480619f0f5SStephen Smalley 1849b77a493bSEric Paris int rc, nclasses, i; 1850e47c8fc5SChristopher J. PeBenito char **classes; 1851e47c8fc5SChristopher J. PeBenito 1852e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 18530619f0f5SStephen Smalley sel_remove_entries(fsi->class_dir); 1854e47c8fc5SChristopher J. PeBenito 18550619f0f5SStephen Smalley rc = security_get_classes(fsi->state, &classes, &nclasses); 1856b77a493bSEric Paris if (rc) 1857b77a493bSEric Paris return rc; 1858e47c8fc5SChristopher J. PeBenito 1859e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 18600619f0f5SStephen Smalley fsi->last_class_ino = sel_class_to_ino(nclasses + 2); 1861e47c8fc5SChristopher J. PeBenito 1862e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1863e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1864e47c8fc5SChristopher J. PeBenito 18650619f0f5SStephen Smalley class_name_dir = sel_make_dir(fsi->class_dir, classes[i], 18660619f0f5SStephen Smalley &fsi->last_class_ino); 1867a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1868a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1869b77a493bSEric Paris goto out; 1870a1c2aa1eSAl Viro } 1871e47c8fc5SChristopher J. PeBenito 1872e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1873e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1874e47c8fc5SChristopher J. PeBenito class_name_dir); 1875e47c8fc5SChristopher J. PeBenito if (rc) 1876b77a493bSEric Paris goto out; 1877e47c8fc5SChristopher J. PeBenito } 1878b77a493bSEric Paris rc = 0; 1879b77a493bSEric Paris out: 1880e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1881e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1882e47c8fc5SChristopher J. PeBenito kfree(classes); 1883e47c8fc5SChristopher J. PeBenito return rc; 1884e47c8fc5SChristopher J. PeBenito } 1885e47c8fc5SChristopher J. PeBenito 18860619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi) 18873bb56b25SPaul Moore { 18883bb56b25SPaul Moore unsigned int iter; 18893bb56b25SPaul Moore struct dentry *dentry = NULL; 18903bb56b25SPaul Moore struct inode *inode = NULL; 18913bb56b25SPaul Moore 18920619f0f5SStephen Smalley sel_remove_entries(fsi->policycap_dir); 18933bb56b25SPaul Moore 18943bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 18954dc2fce3SStephen Smalley if (iter < ARRAY_SIZE(selinux_policycap_names)) 18960619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, 18974dc2fce3SStephen Smalley selinux_policycap_names[iter]); 18983bb56b25SPaul Moore else 18990619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, "unknown"); 19003bb56b25SPaul Moore 19013bb56b25SPaul Moore if (dentry == NULL) 19023bb56b25SPaul Moore return -ENOMEM; 19033bb56b25SPaul Moore 19040619f0f5SStephen Smalley inode = sel_make_inode(fsi->sb, S_IFREG | 0444); 19057e4237faSnixiaoming if (inode == NULL) { 19067e4237faSnixiaoming dput(dentry); 19073bb56b25SPaul Moore return -ENOMEM; 19087e4237faSnixiaoming } 19093bb56b25SPaul Moore 19103bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 19113bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 19123bb56b25SPaul Moore d_add(dentry, inode); 19133bb56b25SPaul Moore } 19143bb56b25SPaul Moore 19153bb56b25SPaul Moore return 0; 19163bb56b25SPaul Moore } 19173bb56b25SPaul Moore 1918a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 19190dd4ae51SChristopher J. PeBenito unsigned long *ino) 19201da177e4SLinus Torvalds { 1921a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 19221da177e4SLinus Torvalds struct inode *inode; 19231da177e4SLinus Torvalds 1924a1c2aa1eSAl Viro if (!dentry) 1925a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1926a1c2aa1eSAl Viro 1927a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1928a1c2aa1eSAl Viro if (!inode) { 1929a1c2aa1eSAl Viro dput(dentry); 1930a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1931a1c2aa1eSAl Viro } 1932b77a493bSEric Paris 19331da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 19341da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 19350dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 193640e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1937d8c76e6fSDave Hansen inc_nlink(inode); 19381da177e4SLinus Torvalds d_add(dentry, inode); 1939edb20fb5SJames Morris /* bump link count on parent directory, too */ 1940ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1941b77a493bSEric Paris 1942a1c2aa1eSAl Viro return dentry; 19431da177e4SLinus Torvalds } 19441da177e4SLinus Torvalds 19450619f0f5SStephen Smalley #define NULL_FILE_NAME "null" 19460619f0f5SStephen Smalley 1947920f50b2SDavid Howells static int sel_fill_super(struct super_block *sb, struct fs_context *fc) 19481da177e4SLinus Torvalds { 19490619f0f5SStephen Smalley struct selinux_fs_info *fsi; 19501da177e4SLinus Torvalds int ret; 19511da177e4SLinus Torvalds struct dentry *dentry; 1952a1c2aa1eSAl Viro struct inode *inode; 19531da177e4SLinus Torvalds struct inode_security_struct *isec; 19541da177e4SLinus Torvalds 1955cda37124SEric Biggers static const struct tree_descr selinux_files[] = { 19561da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 19571da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1958ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 19591da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 19601da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 19611da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 19621da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 19631da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 19641da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 19651da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 19661da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 19671da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 19681da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 19693f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 19703f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 197111904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 197272e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1973f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1974f9df6458SAndrew Perepechko S_IWUGO}, 19751da177e4SLinus Torvalds /* last one */ {""} 19761da177e4SLinus Torvalds }; 19770619f0f5SStephen Smalley 19780619f0f5SStephen Smalley ret = selinux_fs_info_create(sb); 19790619f0f5SStephen Smalley if (ret) 19800619f0f5SStephen Smalley goto err; 19810619f0f5SStephen Smalley 19821da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 19831da177e4SLinus Torvalds if (ret) 1984161ce45aSJames Morris goto err; 19851da177e4SLinus Torvalds 19860619f0f5SStephen Smalley fsi = sb->s_fs_info; 19870619f0f5SStephen Smalley fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); 19880619f0f5SStephen Smalley if (IS_ERR(fsi->bool_dir)) { 19890619f0f5SStephen Smalley ret = PTR_ERR(fsi->bool_dir); 19900619f0f5SStephen Smalley fsi->bool_dir = NULL; 1991161ce45aSJames Morris goto err; 1992a1c2aa1eSAl Viro } 19931da177e4SLinus Torvalds 1994b77a493bSEric Paris ret = -ENOMEM; 19951da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1996b77a493bSEric Paris if (!dentry) 1997161ce45aSJames Morris goto err; 19981da177e4SLinus Torvalds 1999161ce45aSJames Morris ret = -ENOMEM; 2000b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 20017e4237faSnixiaoming if (!inode) { 20027e4237faSnixiaoming dput(dentry); 2003161ce45aSJames Morris goto err; 20047e4237faSnixiaoming } 2005b77a493bSEric Paris 20060619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 200780788c22SCasey Schaufler isec = selinux_inode(inode); 20081da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 20091da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 201042059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 20131da177e4SLinus Torvalds d_add(dentry, inode); 20141da177e4SLinus Torvalds 20150619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); 2016a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2017a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2018161ce45aSJames Morris goto err; 2019a1c2aa1eSAl Viro } 20201da177e4SLinus Torvalds 20211da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 202266f8e2f0SJeff Vander Stoep 202366f8e2f0SJeff Vander Stoep dentry = sel_make_dir(sb->s_root, "ss", &fsi->last_ino); 202466f8e2f0SJeff Vander Stoep if (IS_ERR(dentry)) { 202566f8e2f0SJeff Vander Stoep ret = PTR_ERR(dentry); 202666f8e2f0SJeff Vander Stoep goto err; 202766f8e2f0SJeff Vander Stoep } 202866f8e2f0SJeff Vander Stoep 202966f8e2f0SJeff Vander Stoep ret = sel_make_ss_files(dentry); 20301da177e4SLinus Torvalds if (ret) 2031161ce45aSJames Morris goto err; 2032f0ee2e46SJames Carter 20330619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); 2034a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2035a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2036f0ee2e46SJames Carter goto err; 2037a1c2aa1eSAl Viro } 2038f0ee2e46SJames Carter 2039f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 2040f0ee2e46SJames Carter if (ret) 2041f0ee2e46SJames Carter goto err; 2042f0ee2e46SJames Carter 20430619f0f5SStephen Smalley fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); 20440619f0f5SStephen Smalley if (IS_ERR(fsi->class_dir)) { 20450619f0f5SStephen Smalley ret = PTR_ERR(fsi->class_dir); 20460619f0f5SStephen Smalley fsi->class_dir = NULL; 2047e47c8fc5SChristopher J. PeBenito goto err; 2048a1c2aa1eSAl Viro } 2049e47c8fc5SChristopher J. PeBenito 20500619f0f5SStephen Smalley fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", 20510619f0f5SStephen Smalley &fsi->last_ino); 20520619f0f5SStephen Smalley if (IS_ERR(fsi->policycap_dir)) { 20530619f0f5SStephen Smalley ret = PTR_ERR(fsi->policycap_dir); 20540619f0f5SStephen Smalley fsi->policycap_dir = NULL; 2055e47c8fc5SChristopher J. PeBenito goto err; 2056a1c2aa1eSAl Viro } 20570619f0f5SStephen Smalley 20580619f0f5SStephen Smalley ret = sel_make_policy_nodes(fsi); 20590619f0f5SStephen Smalley if (ret) 20600619f0f5SStephen Smalley goto err; 2061b77a493bSEric Paris return 0; 2062161ce45aSJames Morris err: 2063f8b69a5fSpeter enderborg pr_err("SELinux: %s: failed while creating inodes\n", 2064744ba35eSEric Paris __func__); 20650619f0f5SStephen Smalley 20660619f0f5SStephen Smalley selinux_fs_info_free(sb); 20670619f0f5SStephen Smalley 2068b77a493bSEric Paris return ret; 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds 2071920f50b2SDavid Howells static int sel_get_tree(struct fs_context *fc) 20721da177e4SLinus Torvalds { 2073920f50b2SDavid Howells return get_tree_single(fc, sel_fill_super); 2074920f50b2SDavid Howells } 2075920f50b2SDavid Howells 2076920f50b2SDavid Howells static const struct fs_context_operations sel_context_ops = { 2077920f50b2SDavid Howells .get_tree = sel_get_tree, 2078920f50b2SDavid Howells }; 2079920f50b2SDavid Howells 2080920f50b2SDavid Howells static int sel_init_fs_context(struct fs_context *fc) 2081920f50b2SDavid Howells { 2082920f50b2SDavid Howells fc->ops = &sel_context_ops; 2083920f50b2SDavid Howells return 0; 20841da177e4SLinus Torvalds } 20851da177e4SLinus Torvalds 20860619f0f5SStephen Smalley static void sel_kill_sb(struct super_block *sb) 20870619f0f5SStephen Smalley { 20880619f0f5SStephen Smalley selinux_fs_info_free(sb); 20890619f0f5SStephen Smalley kill_litter_super(sb); 20900619f0f5SStephen Smalley } 20910619f0f5SStephen Smalley 20921da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 20931da177e4SLinus Torvalds .name = "selinuxfs", 2094920f50b2SDavid Howells .init_fs_context = sel_init_fs_context, 20950619f0f5SStephen Smalley .kill_sb = sel_kill_sb, 20961da177e4SLinus Torvalds }; 20971da177e4SLinus Torvalds 20981da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 20990619f0f5SStephen Smalley struct path selinux_null; 21001da177e4SLinus Torvalds 21011da177e4SLinus Torvalds static int __init init_sel_fs(void) 21021da177e4SLinus Torvalds { 21030619f0f5SStephen Smalley struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, 21040619f0f5SStephen Smalley sizeof(NULL_FILE_NAME)-1); 21051da177e4SLinus Torvalds int err; 21061da177e4SLinus Torvalds 21076c5a682eSStephen Smalley if (!selinux_enabled_boot) 21081da177e4SLinus Torvalds return 0; 21097a627e3bSGreg Kroah-Hartman 2110f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 2111f9bb4882SEric W. Biederman if (err) 2112f9bb4882SEric W. Biederman return err; 21137a627e3bSGreg Kroah-Hartman 21141da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 21157a627e3bSGreg Kroah-Hartman if (err) { 2116f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2117b77a493bSEric Paris return err; 21187a627e3bSGreg Kroah-Hartman } 2119b77a493bSEric Paris 2120765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 21211da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 2122f8b69a5fSpeter enderborg pr_err("selinuxfs: could not mount!\n"); 21231da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 21241da177e4SLinus Torvalds selinuxfs_mount = NULL; 21251da177e4SLinus Torvalds } 21260619f0f5SStephen Smalley selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, 21270619f0f5SStephen Smalley &null_name); 21280619f0f5SStephen Smalley if (IS_ERR(selinux_null.dentry)) { 21290619f0f5SStephen Smalley pr_err("selinuxfs: could not lookup null!\n"); 21300619f0f5SStephen Smalley err = PTR_ERR(selinux_null.dentry); 21310619f0f5SStephen Smalley selinux_null.dentry = NULL; 21320619f0f5SStephen Smalley } 2133b77a493bSEric Paris 21341da177e4SLinus Torvalds return err; 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds __initcall(init_sel_fs); 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 21401da177e4SLinus Torvalds void exit_sel_fs(void) 21411da177e4SLinus Torvalds { 2142f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2143fd40ffc7SStephen Smalley dput(selinux_null.dentry); 2144423e0ab0STim Chen kern_unmount(selinuxfs_mount); 21451da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 21461da177e4SLinus Torvalds } 21471da177e4SLinus Torvalds #endif 2148