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 28489b223bfSPaul Moore /* NOTE: we are now officially considering runtime disable as 28589b223bfSPaul Moore * deprecated, and using it will become increasingly painful 28689b223bfSPaul Moore * (e.g. sleeping/blocking) as we progress through future 28789b223bfSPaul Moore * kernel releases until eventually it is removed 28889b223bfSPaul Moore */ 28989b223bfSPaul Moore pr_err("SELinux: Runtime disable is deprecated, use selinux=0 on the kernel cmdline.\n"); 29089b223bfSPaul Moore 291bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2928365a719SAl Viro return -ENOMEM; 293b77a493bSEric Paris 2941da177e4SLinus Torvalds /* No partial writes. */ 295b77a493bSEric Paris if (*ppos != 0) 2968365a719SAl Viro return -EINVAL; 297b77a493bSEric Paris 2988365a719SAl Viro page = memdup_user_nul(buf, count); 2998365a719SAl Viro if (IS_ERR(page)) 3008365a719SAl Viro return PTR_ERR(page); 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds length = -EINVAL; 3031da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 3041da177e4SLinus Torvalds goto out; 3051da177e4SLinus Torvalds 3061da177e4SLinus Torvalds if (new_value) { 3074195ed42SRichard Guy Briggs enforcing = enforcing_enabled(fsi->state); 3080619f0f5SStephen Smalley length = selinux_disable(fsi->state); 309b77a493bSEric Paris if (length) 3101da177e4SLinus Torvalds goto out; 311cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, 3124195ed42SRichard Guy Briggs "enforcing=%d old_enforcing=%d auid=%u ses=%u" 3136c5a682eSStephen Smalley " enabled=0 old-enabled=1 lsm=selinux res=1", 3144195ed42SRichard Guy Briggs enforcing, enforcing, 315581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 3166c5a682eSStephen Smalley audit_get_sessionid(current)); 3171da177e4SLinus Torvalds } 3181da177e4SLinus Torvalds 3191da177e4SLinus Torvalds length = count; 3201da177e4SLinus Torvalds out: 3218365a719SAl Viro kfree(page); 3221da177e4SLinus Torvalds return length; 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds #else 3251da177e4SLinus Torvalds #define sel_write_disable NULL 3261da177e4SLinus Torvalds #endif 3271da177e4SLinus Torvalds 3289c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3291da177e4SLinus Torvalds .write = sel_write_disable, 33057a62c23SArnd Bergmann .llseek = generic_file_llseek, 3311da177e4SLinus Torvalds }; 3321da177e4SLinus Torvalds 3331da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3341da177e4SLinus Torvalds size_t count, loff_t *ppos) 3351da177e4SLinus Torvalds { 3361da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3371da177e4SLinus Torvalds ssize_t length; 3381da177e4SLinus Torvalds 3391da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3401da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3411da177e4SLinus Torvalds } 3421da177e4SLinus Torvalds 3439c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3441da177e4SLinus Torvalds .read = sel_read_policyvers, 34557a62c23SArnd Bergmann .llseek = generic_file_llseek, 3461da177e4SLinus Torvalds }; 3471da177e4SLinus Torvalds 3481da177e4SLinus Torvalds /* declaration for sel_write_load */ 3490619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi); 3500619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi); 3510619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi); 352e47c8fc5SChristopher J. PeBenito 353e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 354a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 355e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3581da177e4SLinus Torvalds size_t count, loff_t *ppos) 3591da177e4SLinus Torvalds { 3600619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 3611da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3621da177e4SLinus Torvalds ssize_t length; 3631da177e4SLinus Torvalds 3640719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3650619f0f5SStephen Smalley security_mls_enabled(fsi->state)); 3661da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3671da177e4SLinus Torvalds } 3681da177e4SLinus Torvalds 3699c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3701da177e4SLinus Torvalds .read = sel_read_mls, 37157a62c23SArnd Bergmann .llseek = generic_file_llseek, 3721da177e4SLinus Torvalds }; 3731da177e4SLinus Torvalds 374cee74f47SEric Paris struct policy_load_memory { 375cee74f47SEric Paris size_t len; 376cee74f47SEric Paris void *data; 377cee74f47SEric Paris }; 378cee74f47SEric Paris 379cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 380cee74f47SEric Paris { 3810619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 3820619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 383cee74f47SEric Paris struct policy_load_memory *plm = NULL; 384cee74f47SEric Paris int rc; 385cee74f47SEric Paris 386cee74f47SEric Paris BUG_ON(filp->private_data); 387cee74f47SEric Paris 3880619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 389cee74f47SEric Paris 3906b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 3916b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 392be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 393cee74f47SEric Paris if (rc) 394cee74f47SEric Paris goto err; 395cee74f47SEric Paris 396cee74f47SEric Paris rc = -EBUSY; 3970619f0f5SStephen Smalley if (fsi->policy_opened) 398cee74f47SEric Paris goto err; 399cee74f47SEric Paris 400cee74f47SEric Paris rc = -ENOMEM; 401cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 402cee74f47SEric Paris if (!plm) 403cee74f47SEric Paris goto err; 404cee74f47SEric Paris 4050619f0f5SStephen Smalley if (i_size_read(inode) != security_policydb_len(state)) { 4065955102cSAl Viro inode_lock(inode); 4070619f0f5SStephen Smalley i_size_write(inode, security_policydb_len(state)); 4085955102cSAl Viro inode_unlock(inode); 409cee74f47SEric Paris } 410cee74f47SEric Paris 4110619f0f5SStephen Smalley rc = security_read_policy(state, &plm->data, &plm->len); 412cee74f47SEric Paris if (rc) 413cee74f47SEric Paris goto err; 414cee74f47SEric Paris 4150619f0f5SStephen Smalley fsi->policy_opened = 1; 416cee74f47SEric Paris 417cee74f47SEric Paris filp->private_data = plm; 418cee74f47SEric Paris 4190619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 420cee74f47SEric Paris 421cee74f47SEric Paris return 0; 422cee74f47SEric Paris err: 4230619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 424cee74f47SEric Paris 425cee74f47SEric Paris if (plm) 426cee74f47SEric Paris vfree(plm->data); 427cee74f47SEric Paris kfree(plm); 428cee74f47SEric Paris return rc; 429cee74f47SEric Paris } 430cee74f47SEric Paris 431cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 432cee74f47SEric Paris { 4330619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 434cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 435cee74f47SEric Paris 436cee74f47SEric Paris BUG_ON(!plm); 437cee74f47SEric Paris 4380619f0f5SStephen Smalley fsi->policy_opened = 0; 439cee74f47SEric Paris 440cee74f47SEric Paris vfree(plm->data); 441cee74f47SEric Paris kfree(plm); 442cee74f47SEric Paris 443cee74f47SEric Paris return 0; 444cee74f47SEric Paris } 445cee74f47SEric Paris 446cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 447cee74f47SEric Paris size_t count, loff_t *ppos) 448cee74f47SEric Paris { 449cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 450cee74f47SEric Paris int ret; 451cee74f47SEric Paris 4526b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 4536b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 454be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 455cee74f47SEric Paris if (ret) 456cee74f47SEric Paris return ret; 4570da74120SJann Horn 4580da74120SJann Horn return simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 459cee74f47SEric Paris } 460cee74f47SEric Paris 461ac9a1f6dSSouptick Joarder static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf) 462845ca30fSEric Paris { 46311bac800SDave Jiang struct policy_load_memory *plm = vmf->vma->vm_file->private_data; 464845ca30fSEric Paris unsigned long offset; 465845ca30fSEric Paris struct page *page; 466845ca30fSEric Paris 467845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 468845ca30fSEric Paris return VM_FAULT_SIGBUS; 469845ca30fSEric Paris 470845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 471845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 472845ca30fSEric Paris return VM_FAULT_SIGBUS; 473845ca30fSEric Paris 474845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 475845ca30fSEric Paris get_page(page); 476845ca30fSEric Paris 477845ca30fSEric Paris vmf->page = page; 478845ca30fSEric Paris 479845ca30fSEric Paris return 0; 480845ca30fSEric Paris } 481845ca30fSEric Paris 4827cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 483845ca30fSEric Paris .fault = sel_mmap_policy_fault, 484845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 485845ca30fSEric Paris }; 486845ca30fSEric Paris 487ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 488845ca30fSEric Paris { 489845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 490845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 491845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 492845ca30fSEric Paris 493845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 494845ca30fSEric Paris return -EACCES; 495845ca30fSEric Paris } 496845ca30fSEric Paris 497314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 498845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 499845ca30fSEric Paris 500845ca30fSEric Paris return 0; 501845ca30fSEric Paris } 502845ca30fSEric Paris 503cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 504cee74f47SEric Paris .open = sel_open_policy, 505cee74f47SEric Paris .read = sel_read_policy, 506845ca30fSEric Paris .mmap = sel_mmap_policy, 507cee74f47SEric Paris .release = sel_release_policy, 50847a93a5bSEric Paris .llseek = generic_file_llseek, 509cee74f47SEric Paris }; 510cee74f47SEric Paris 5110619f0f5SStephen Smalley static int sel_make_policy_nodes(struct selinux_fs_info *fsi) 5120619f0f5SStephen Smalley { 5130619f0f5SStephen Smalley int ret; 5140619f0f5SStephen Smalley 5150619f0f5SStephen Smalley ret = sel_make_bools(fsi); 5160619f0f5SStephen Smalley if (ret) { 5170619f0f5SStephen Smalley pr_err("SELinux: failed to load policy booleans\n"); 5180619f0f5SStephen Smalley return ret; 5190619f0f5SStephen Smalley } 5200619f0f5SStephen Smalley 5210619f0f5SStephen Smalley ret = sel_make_classes(fsi); 5220619f0f5SStephen Smalley if (ret) { 5230619f0f5SStephen Smalley pr_err("SELinux: failed to load policy classes\n"); 5240619f0f5SStephen Smalley return ret; 5250619f0f5SStephen Smalley } 5260619f0f5SStephen Smalley 5270619f0f5SStephen Smalley ret = sel_make_policycap(fsi); 5280619f0f5SStephen Smalley if (ret) { 5290619f0f5SStephen Smalley pr_err("SELinux: failed to load policy capabilities\n"); 5300619f0f5SStephen Smalley return ret; 5310619f0f5SStephen Smalley } 5320619f0f5SStephen Smalley 5330619f0f5SStephen Smalley return 0; 5340619f0f5SStephen Smalley } 5350619f0f5SStephen Smalley 5361da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5371da177e4SLinus Torvalds size_t count, loff_t *ppos) 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds { 5400619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5411da177e4SLinus Torvalds ssize_t length; 5421da177e4SLinus Torvalds void *data = NULL; 5431da177e4SLinus Torvalds 5440619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 5451da177e4SLinus Torvalds 5466b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5476b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 548be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); 5491da177e4SLinus Torvalds if (length) 5501da177e4SLinus Torvalds goto out; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds /* No partial writes. */ 5531da177e4SLinus Torvalds length = -EINVAL; 554b77a493bSEric Paris if (*ppos != 0) 5551da177e4SLinus Torvalds goto out; 5561da177e4SLinus Torvalds 557b77a493bSEric Paris length = -ENOMEM; 558b77a493bSEric Paris data = vmalloc(count); 559b77a493bSEric Paris if (!data) 560b77a493bSEric Paris goto out; 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds length = -EFAULT; 5631da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5641da177e4SLinus Torvalds goto out; 5651da177e4SLinus Torvalds 5660619f0f5SStephen Smalley length = security_load_policy(fsi->state, data, count); 5674262fb51SGary Tierney if (length) { 5684262fb51SGary Tierney pr_warn_ratelimited("SELinux: failed to load policy\n"); 5691da177e4SLinus Torvalds goto out; 5704262fb51SGary Tierney } 5711da177e4SLinus Torvalds 5720619f0f5SStephen Smalley length = sel_make_policy_nodes(fsi); 5730619f0f5SStephen Smalley if (length) 574e47c8fc5SChristopher J. PeBenito goto out1; 575b77a493bSEric Paris 5761da177e4SLinus Torvalds length = count; 577e47c8fc5SChristopher J. PeBenito 578e47c8fc5SChristopher J. PeBenito out1: 579cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 580d141136fSRichard Guy Briggs "auid=%u ses=%u lsm=selinux res=1", 581581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5824746ec5bSEric Paris audit_get_sessionid(current)); 5831da177e4SLinus Torvalds out: 5840619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 5851da177e4SLinus Torvalds vfree(data); 5861da177e4SLinus Torvalds return length; 5871da177e4SLinus Torvalds } 5881da177e4SLinus Torvalds 5899c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5901da177e4SLinus Torvalds .write = sel_write_load, 59157a62c23SArnd Bergmann .llseek = generic_file_llseek, 5921da177e4SLinus Torvalds }; 5931da177e4SLinus Torvalds 594ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5951da177e4SLinus Torvalds { 5960619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5970619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 598b77a493bSEric Paris char *canon = NULL; 599ce9982d0SStephen Smalley u32 sid, len; 6001da177e4SLinus Torvalds ssize_t length; 6011da177e4SLinus Torvalds 6026b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6036b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 604be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); 6051da177e4SLinus Torvalds if (length) 606b77a493bSEric Paris goto out; 6071da177e4SLinus Torvalds 6080619f0f5SStephen Smalley length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); 609b77a493bSEric Paris if (length) 610b77a493bSEric Paris goto out; 6111da177e4SLinus Torvalds 6120619f0f5SStephen Smalley length = security_sid_to_context(state, sid, &canon, &len); 613b77a493bSEric Paris if (length) 614b77a493bSEric Paris goto out; 615ce9982d0SStephen Smalley 616b77a493bSEric Paris length = -ERANGE; 617ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 618f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 619744ba35eSEric Paris "payload max\n", __func__, len); 620ce9982d0SStephen Smalley goto out; 621ce9982d0SStephen Smalley } 622ce9982d0SStephen Smalley 623ce9982d0SStephen Smalley memcpy(buf, canon, len); 624ce9982d0SStephen Smalley length = len; 6251da177e4SLinus Torvalds out: 626ce9982d0SStephen Smalley kfree(canon); 6271da177e4SLinus Torvalds return length; 6281da177e4SLinus Torvalds } 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6311da177e4SLinus Torvalds size_t count, loff_t *ppos) 6321da177e4SLinus Torvalds { 6330619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 6341da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6351da177e4SLinus Torvalds ssize_t length; 6361da177e4SLinus Torvalds 6370619f0f5SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); 6381da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6421da177e4SLinus Torvalds size_t count, loff_t *ppos) 6431da177e4SLinus Torvalds { 6440619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6458365a719SAl Viro char *page; 6461da177e4SLinus Torvalds ssize_t length; 6471da177e4SLinus Torvalds unsigned int new_value; 6481da177e4SLinus Torvalds 6496b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6506b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 651be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, 652be0554c9SStephen Smalley NULL); 6531da177e4SLinus Torvalds if (length) 6548365a719SAl Viro return length; 6551da177e4SLinus Torvalds 656bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6578365a719SAl Viro return -ENOMEM; 658b77a493bSEric Paris 6591da177e4SLinus Torvalds /* No partial writes. */ 660b77a493bSEric Paris if (*ppos != 0) 6618365a719SAl Viro return -EINVAL; 662b77a493bSEric Paris 6638365a719SAl Viro page = memdup_user_nul(buf, count); 6648365a719SAl Viro if (IS_ERR(page)) 6658365a719SAl Viro return PTR_ERR(page); 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds length = -EINVAL; 6681da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6691da177e4SLinus Torvalds goto out; 6701da177e4SLinus Torvalds 671e9c38f9fSStephen Smalley if (new_value) { 672e9c38f9fSStephen Smalley char comm[sizeof(current->comm)]; 673e9c38f9fSStephen Smalley 674e9c38f9fSStephen Smalley memcpy(comm, current->comm, sizeof(comm)); 675e9c38f9fSStephen Smalley pr_warn_once("SELinux: %s (%d) set checkreqprot to 1. This is deprecated and will be rejected in a future kernel release.\n", 676e9c38f9fSStephen Smalley comm, current->pid); 677e9c38f9fSStephen Smalley } 678e9c38f9fSStephen Smalley 6790619f0f5SStephen Smalley fsi->state->checkreqprot = new_value ? 1 : 0; 6801da177e4SLinus Torvalds length = count; 6811da177e4SLinus Torvalds out: 6828365a719SAl Viro kfree(page); 6831da177e4SLinus Torvalds return length; 6841da177e4SLinus Torvalds } 6859c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6861da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6871da177e4SLinus Torvalds .write = sel_write_checkreqprot, 68857a62c23SArnd Bergmann .llseek = generic_file_llseek, 6891da177e4SLinus Torvalds }; 6901da177e4SLinus Torvalds 691f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 692f9df6458SAndrew Perepechko const char __user *buf, 693f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 694f9df6458SAndrew Perepechko { 6950619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6960619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 697f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 698f9df6458SAndrew Perepechko char *req = NULL; 699f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 700f9df6458SAndrew Perepechko u16 tclass; 701f9df6458SAndrew Perepechko int rc; 702f9df6458SAndrew Perepechko 7036b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 7046b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 705be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); 706f9df6458SAndrew Perepechko if (rc) 707f9df6458SAndrew Perepechko goto out; 708f9df6458SAndrew Perepechko 709f9df6458SAndrew Perepechko rc = -ENOMEM; 710f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 711f9df6458SAndrew Perepechko goto out; 712f9df6458SAndrew Perepechko 713f9df6458SAndrew Perepechko /* No partial writes. */ 714f9df6458SAndrew Perepechko rc = -EINVAL; 715f9df6458SAndrew Perepechko if (*ppos != 0) 716f9df6458SAndrew Perepechko goto out; 717f9df6458SAndrew Perepechko 7180b884d25SAl Viro req = memdup_user_nul(buf, count); 7190b884d25SAl Viro if (IS_ERR(req)) { 7200b884d25SAl Viro rc = PTR_ERR(req); 7210b884d25SAl Viro req = NULL; 722f9df6458SAndrew Perepechko goto out; 7230b884d25SAl Viro } 724f9df6458SAndrew Perepechko 725f9df6458SAndrew Perepechko rc = -ENOMEM; 726f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 727f9df6458SAndrew Perepechko if (!oldcon) 728f9df6458SAndrew Perepechko goto out; 729f9df6458SAndrew Perepechko 730f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 731f9df6458SAndrew Perepechko if (!newcon) 732f9df6458SAndrew Perepechko goto out; 733f9df6458SAndrew Perepechko 734f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 735f9df6458SAndrew Perepechko if (!taskcon) 736f9df6458SAndrew Perepechko goto out; 737f9df6458SAndrew Perepechko 738f9df6458SAndrew Perepechko rc = -EINVAL; 739f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 740f9df6458SAndrew Perepechko goto out; 741f9df6458SAndrew Perepechko 7420619f0f5SStephen Smalley rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); 743f9df6458SAndrew Perepechko if (rc) 744f9df6458SAndrew Perepechko goto out; 745f9df6458SAndrew Perepechko 7460619f0f5SStephen Smalley rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); 747f9df6458SAndrew Perepechko if (rc) 748f9df6458SAndrew Perepechko goto out; 749f9df6458SAndrew Perepechko 7500619f0f5SStephen Smalley rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); 751f9df6458SAndrew Perepechko if (rc) 752f9df6458SAndrew Perepechko goto out; 753f9df6458SAndrew Perepechko 7540619f0f5SStephen Smalley rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); 755f9df6458SAndrew Perepechko if (!rc) 756f9df6458SAndrew Perepechko rc = count; 757f9df6458SAndrew Perepechko out: 758f9df6458SAndrew Perepechko kfree(req); 759f9df6458SAndrew Perepechko kfree(oldcon); 760f9df6458SAndrew Perepechko kfree(newcon); 761f9df6458SAndrew Perepechko kfree(taskcon); 762f9df6458SAndrew Perepechko return rc; 763f9df6458SAndrew Perepechko } 764f9df6458SAndrew Perepechko 765f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 766f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 767f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 768f9df6458SAndrew Perepechko }; 769f9df6458SAndrew Perepechko 7701da177e4SLinus Torvalds /* 7711da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7721da177e4SLinus Torvalds */ 7731da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7741da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7751da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7761da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7771da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7781da177e4SLinus Torvalds 779631d2b49SEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 7801da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7811da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7821da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7831da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7841da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 785ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7861da177e4SLinus Torvalds }; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7891da177e4SLinus Torvalds { 790496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7911da177e4SLinus Torvalds char *data; 7921da177e4SLinus Torvalds ssize_t rv; 7931da177e4SLinus Torvalds 7946e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7951da177e4SLinus Torvalds return -EINVAL; 7961da177e4SLinus Torvalds 7971da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7981da177e4SLinus Torvalds if (IS_ERR(data)) 7991da177e4SLinus Torvalds return PTR_ERR(data); 8001da177e4SLinus Torvalds 8011da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 8021da177e4SLinus Torvalds if (rv > 0) { 8031da177e4SLinus Torvalds simple_transaction_set(file, rv); 8041da177e4SLinus Torvalds rv = size; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds return rv; 8071da177e4SLinus Torvalds } 8081da177e4SLinus Torvalds 8099c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 8101da177e4SLinus Torvalds .write = selinux_transaction_write, 8111da177e4SLinus Torvalds .read = simple_transaction_read, 8121da177e4SLinus Torvalds .release = simple_transaction_release, 81357a62c23SArnd Bergmann .llseek = generic_file_llseek, 8141da177e4SLinus Torvalds }; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds /* 8171da177e4SLinus Torvalds * payload - write methods 8181da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 8191da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 8201da177e4SLinus Torvalds */ 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 8231da177e4SLinus Torvalds { 8240619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8250619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 826b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8271da177e4SLinus Torvalds u32 ssid, tsid; 8281da177e4SLinus Torvalds u16 tclass; 8291da177e4SLinus Torvalds struct av_decision avd; 8301da177e4SLinus Torvalds ssize_t length; 8311da177e4SLinus Torvalds 8326b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8336b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 834be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); 8351da177e4SLinus Torvalds if (length) 836b77a493bSEric Paris goto out; 8371da177e4SLinus Torvalds 8381da177e4SLinus Torvalds length = -ENOMEM; 83989d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8401da177e4SLinus Torvalds if (!scon) 841b77a493bSEric Paris goto out; 8421da177e4SLinus Torvalds 843b77a493bSEric Paris length = -ENOMEM; 84489d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8451da177e4SLinus Torvalds if (!tcon) 8461da177e4SLinus Torvalds goto out; 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds length = -EINVAL; 84919439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 850b77a493bSEric Paris goto out; 8511da177e4SLinus Torvalds 8520619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 853b77a493bSEric Paris if (length) 854b77a493bSEric Paris goto out; 855b77a493bSEric Paris 8560619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 857b77a493bSEric Paris if (length) 858b77a493bSEric Paris goto out; 8591da177e4SLinus Torvalds 8600619f0f5SStephen Smalley security_compute_av_user(state, ssid, tsid, tclass, &avd); 8611da177e4SLinus Torvalds 8621da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8638a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 864f1c6381aSEric Paris avd.allowed, 0xffffffff, 8651da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8668a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8671da177e4SLinus Torvalds out: 868b77a493bSEric Paris kfree(tcon); 8691da177e4SLinus Torvalds kfree(scon); 8701da177e4SLinus Torvalds return length; 8711da177e4SLinus Torvalds } 8721da177e4SLinus Torvalds 8731da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8741da177e4SLinus Torvalds { 8750619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8760619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 877b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 878f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8791da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8801da177e4SLinus Torvalds u16 tclass; 8811da177e4SLinus Torvalds ssize_t length; 882b77a493bSEric Paris char *newcon = NULL; 8831da177e4SLinus Torvalds u32 len; 884f50a3ec9SKohei Kaigai int nargs; 8851da177e4SLinus Torvalds 8866b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8876b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 888be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, 889be0554c9SStephen Smalley NULL); 8901da177e4SLinus Torvalds if (length) 891b77a493bSEric Paris goto out; 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds length = -ENOMEM; 89489d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8951da177e4SLinus Torvalds if (!scon) 896b77a493bSEric Paris goto out; 8971da177e4SLinus Torvalds 898b77a493bSEric Paris length = -ENOMEM; 89989d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9001da177e4SLinus Torvalds if (!tcon) 9011da177e4SLinus Torvalds goto out; 9021da177e4SLinus Torvalds 903f50a3ec9SKohei Kaigai length = -ENOMEM; 904f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 905f50a3ec9SKohei Kaigai if (!namebuf) 906b77a493bSEric Paris goto out; 9071da177e4SLinus Torvalds 908f50a3ec9SKohei Kaigai length = -EINVAL; 909f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 910f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 911f50a3ec9SKohei Kaigai goto out; 9120f7e4c33SKohei Kaigai if (nargs == 4) { 9130f7e4c33SKohei Kaigai /* 9140f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 9150f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 9160f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 9170f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 9180f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 9190f7e4c33SKohei Kaigai */ 9200f7e4c33SKohei Kaigai char *r, *w; 9210f7e4c33SKohei Kaigai int c1, c2; 9220f7e4c33SKohei Kaigai 9230f7e4c33SKohei Kaigai r = w = namebuf; 9240f7e4c33SKohei Kaigai do { 9250f7e4c33SKohei Kaigai c1 = *r++; 9260f7e4c33SKohei Kaigai if (c1 == '+') 9270f7e4c33SKohei Kaigai c1 = ' '; 9280f7e4c33SKohei Kaigai else if (c1 == '%') { 929af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 930af7ff2c2SAndy Shevchenko if (c1 < 0) 9310f7e4c33SKohei Kaigai goto out; 932af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 933af7ff2c2SAndy Shevchenko if (c2 < 0) 9340f7e4c33SKohei Kaigai goto out; 9350f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 9360f7e4c33SKohei Kaigai } 9370f7e4c33SKohei Kaigai *w++ = c1; 9380f7e4c33SKohei Kaigai } while (c1 != '\0'); 9390f7e4c33SKohei Kaigai 940f50a3ec9SKohei Kaigai objname = namebuf; 9410f7e4c33SKohei Kaigai } 942f50a3ec9SKohei Kaigai 9430619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 944b77a493bSEric Paris if (length) 945b77a493bSEric Paris goto out; 946b77a493bSEric Paris 9470619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 948b77a493bSEric Paris if (length) 949b77a493bSEric Paris goto out; 9501da177e4SLinus Torvalds 9510619f0f5SStephen Smalley length = security_transition_sid_user(state, ssid, tsid, tclass, 9520619f0f5SStephen Smalley objname, &newsid); 953b77a493bSEric Paris if (length) 954b77a493bSEric Paris goto out; 9551da177e4SLinus Torvalds 9560619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 957b77a493bSEric Paris if (length) 958b77a493bSEric Paris goto out; 9591da177e4SLinus Torvalds 960b77a493bSEric Paris length = -ERANGE; 9611da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 962f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 963744ba35eSEric Paris "payload max\n", __func__, len); 964b77a493bSEric Paris goto out; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 9671da177e4SLinus Torvalds memcpy(buf, newcon, len); 9681da177e4SLinus Torvalds length = len; 9691da177e4SLinus Torvalds out: 970b77a493bSEric Paris kfree(newcon); 971f50a3ec9SKohei Kaigai kfree(namebuf); 972b77a493bSEric Paris kfree(tcon); 9731da177e4SLinus Torvalds kfree(scon); 9741da177e4SLinus Torvalds return length; 9751da177e4SLinus Torvalds } 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9781da177e4SLinus Torvalds { 9790619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 9800619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 981b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9821da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9831da177e4SLinus Torvalds u16 tclass; 9841da177e4SLinus Torvalds ssize_t length; 985b77a493bSEric Paris char *newcon = NULL; 9861da177e4SLinus Torvalds u32 len; 9871da177e4SLinus Torvalds 9886b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 9896b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 990be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, 991be0554c9SStephen Smalley NULL); 9921da177e4SLinus Torvalds if (length) 993b77a493bSEric Paris goto out; 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds length = -ENOMEM; 99689d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9971da177e4SLinus Torvalds if (!scon) 998b77a493bSEric Paris goto out; 9991da177e4SLinus Torvalds 1000b77a493bSEric Paris length = -ENOMEM; 100189d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 10021da177e4SLinus Torvalds if (!tcon) 10031da177e4SLinus Torvalds goto out; 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds length = -EINVAL; 10061da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1007b77a493bSEric Paris goto out; 10081da177e4SLinus Torvalds 10090619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1010b77a493bSEric Paris if (length) 1011b77a493bSEric Paris goto out; 1012b77a493bSEric Paris 10130619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1014b77a493bSEric Paris if (length) 1015b77a493bSEric Paris goto out; 10161da177e4SLinus Torvalds 10170619f0f5SStephen Smalley length = security_change_sid(state, ssid, tsid, tclass, &newsid); 1018b77a493bSEric Paris if (length) 1019b77a493bSEric Paris goto out; 10201da177e4SLinus Torvalds 10210619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1022b77a493bSEric Paris if (length) 1023b77a493bSEric Paris goto out; 10241da177e4SLinus Torvalds 10251da177e4SLinus Torvalds length = -ERANGE; 1026b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 1027b77a493bSEric Paris goto out; 10281da177e4SLinus Torvalds 10291da177e4SLinus Torvalds memcpy(buf, newcon, len); 10301da177e4SLinus Torvalds length = len; 10311da177e4SLinus Torvalds out: 1032b77a493bSEric Paris kfree(newcon); 1033b77a493bSEric Paris kfree(tcon); 10341da177e4SLinus Torvalds kfree(scon); 10351da177e4SLinus Torvalds return length; 10361da177e4SLinus Torvalds } 10371da177e4SLinus Torvalds 10381da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 10391da177e4SLinus Torvalds { 10400619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10410619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1042b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 1043b77a493bSEric Paris u32 sid, *sids = NULL; 10441da177e4SLinus Torvalds ssize_t length; 10451da177e4SLinus Torvalds char *newcon; 10461da177e4SLinus Torvalds int i, rc; 10471da177e4SLinus Torvalds u32 len, nsids; 10481da177e4SLinus Torvalds 10496b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 10506b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1051be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_USER, 1052be0554c9SStephen Smalley NULL); 10531da177e4SLinus Torvalds if (length) 10546eab04a8SJustin P. Mattock goto out; 10551da177e4SLinus Torvalds 10561da177e4SLinus Torvalds length = -ENOMEM; 105789d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 10581da177e4SLinus Torvalds if (!con) 10596eab04a8SJustin P. Mattock goto out; 10601da177e4SLinus Torvalds 1061b77a493bSEric Paris length = -ENOMEM; 106289d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 10631da177e4SLinus Torvalds if (!user) 10641da177e4SLinus Torvalds goto out; 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds length = -EINVAL; 10671da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 1068b77a493bSEric Paris goto out; 10691da177e4SLinus Torvalds 10700619f0f5SStephen Smalley length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); 1071b77a493bSEric Paris if (length) 1072b77a493bSEric Paris goto out; 10731da177e4SLinus Torvalds 10740619f0f5SStephen Smalley length = security_get_user_sids(state, sid, user, &sids, &nsids); 1075b77a493bSEric Paris if (length) 1076b77a493bSEric Paris goto out; 10771da177e4SLinus Torvalds 10781da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10791da177e4SLinus Torvalds ptr = buf + length; 10801da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10810619f0f5SStephen Smalley rc = security_sid_to_context(state, sids[i], &newcon, &len); 10821da177e4SLinus Torvalds if (rc) { 10831da177e4SLinus Torvalds length = rc; 1084b77a493bSEric Paris goto out; 10851da177e4SLinus Torvalds } 10861da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10871da177e4SLinus Torvalds kfree(newcon); 10881da177e4SLinus Torvalds length = -ERANGE; 1089b77a493bSEric Paris goto out; 10901da177e4SLinus Torvalds } 10911da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10921da177e4SLinus Torvalds kfree(newcon); 10931da177e4SLinus Torvalds ptr += len; 10941da177e4SLinus Torvalds length += len; 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds out: 1097b77a493bSEric Paris kfree(sids); 1098b77a493bSEric Paris kfree(user); 10991da177e4SLinus Torvalds kfree(con); 11001da177e4SLinus Torvalds return length; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 11041da177e4SLinus Torvalds { 11050619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 11060619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1107b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 11081da177e4SLinus Torvalds u32 ssid, tsid, newsid; 11091da177e4SLinus Torvalds u16 tclass; 11101da177e4SLinus Torvalds ssize_t length; 1111b77a493bSEric Paris char *newcon = NULL; 11121da177e4SLinus Torvalds u32 len; 11131da177e4SLinus Torvalds 11146b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 11156b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1116be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, 1117be0554c9SStephen Smalley NULL); 11181da177e4SLinus Torvalds if (length) 1119b77a493bSEric Paris goto out; 11201da177e4SLinus Torvalds 11211da177e4SLinus Torvalds length = -ENOMEM; 112289d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 11231da177e4SLinus Torvalds if (!scon) 11246eab04a8SJustin P. Mattock goto out; 11251da177e4SLinus Torvalds 1126b77a493bSEric Paris length = -ENOMEM; 112789d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 11281da177e4SLinus Torvalds if (!tcon) 11291da177e4SLinus Torvalds goto out; 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds length = -EINVAL; 11321da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1133b77a493bSEric Paris goto out; 11341da177e4SLinus Torvalds 11350619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1136b77a493bSEric Paris if (length) 1137b77a493bSEric Paris goto out; 1138b77a493bSEric Paris 11390619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1140b77a493bSEric Paris if (length) 1141b77a493bSEric Paris goto out; 11421da177e4SLinus Torvalds 11430619f0f5SStephen Smalley length = security_member_sid(state, ssid, tsid, tclass, &newsid); 1144b77a493bSEric Paris if (length) 1145b77a493bSEric Paris goto out; 11461da177e4SLinus Torvalds 11470619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1148b77a493bSEric Paris if (length) 1149b77a493bSEric Paris goto out; 11501da177e4SLinus Torvalds 1151b77a493bSEric Paris length = -ERANGE; 11521da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1153f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 1154744ba35eSEric Paris "payload max\n", __func__, len); 1155b77a493bSEric Paris goto out; 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds memcpy(buf, newcon, len); 11591da177e4SLinus Torvalds length = len; 11601da177e4SLinus Torvalds out: 1161b77a493bSEric Paris kfree(newcon); 1162b77a493bSEric Paris kfree(tcon); 11631da177e4SLinus Torvalds kfree(scon); 11641da177e4SLinus Torvalds return length; 11651da177e4SLinus Torvalds } 11661da177e4SLinus Torvalds 11671da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 11681da177e4SLinus Torvalds { 11691da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds if (ret) { 11721da177e4SLinus Torvalds ret->i_mode = mode; 1173078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds return ret; 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 11791da177e4SLinus Torvalds size_t count, loff_t *ppos) 11801da177e4SLinus Torvalds { 11810619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 11821da177e4SLinus Torvalds char *page = NULL; 11831da177e4SLinus Torvalds ssize_t length; 11841da177e4SLinus Torvalds ssize_t ret; 11851da177e4SLinus Torvalds int cur_enforcing; 1186496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1187d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11881da177e4SLinus Torvalds 11890619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 11901da177e4SLinus Torvalds 1191d313f948SStephen Smalley ret = -EINVAL; 11920619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 11930619f0f5SStephen Smalley fsi->bool_pending_names[index])) 11940da74120SJann Horn goto out_unlock; 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds ret = -ENOMEM; 1197b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1198b77a493bSEric Paris if (!page) 11990da74120SJann Horn goto out_unlock; 12001da177e4SLinus Torvalds 12010619f0f5SStephen Smalley cur_enforcing = security_get_bool_value(fsi->state, index); 12021da177e4SLinus Torvalds if (cur_enforcing < 0) { 12031da177e4SLinus Torvalds ret = cur_enforcing; 12040da74120SJann Horn goto out_unlock; 12051da177e4SLinus Torvalds } 12061da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 12070619f0f5SStephen Smalley fsi->bool_pending_values[index]); 12080619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12090da74120SJann Horn ret = simple_read_from_buffer(buf, count, ppos, page, length); 12100da74120SJann Horn out_free: 12111da177e4SLinus Torvalds free_page((unsigned long)page); 12121da177e4SLinus Torvalds return ret; 12130da74120SJann Horn 12140da74120SJann Horn out_unlock: 12150da74120SJann Horn mutex_unlock(&fsi->mutex); 12160da74120SJann Horn goto out_free; 12171da177e4SLinus Torvalds } 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 12201da177e4SLinus Torvalds size_t count, loff_t *ppos) 12211da177e4SLinus Torvalds { 12220619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12231da177e4SLinus Torvalds char *page = NULL; 1224d313f948SStephen Smalley ssize_t length; 12251da177e4SLinus Torvalds int new_value; 1226496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1227d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 12281da177e4SLinus Torvalds 12290da74120SJann Horn if (count >= PAGE_SIZE) 12300da74120SJann Horn return -ENOMEM; 12310da74120SJann Horn 12320da74120SJann Horn /* No partial writes. */ 12330da74120SJann Horn if (*ppos != 0) 12340da74120SJann Horn return -EINVAL; 12350da74120SJann Horn 12360da74120SJann Horn page = memdup_user_nul(buf, count); 12370da74120SJann Horn if (IS_ERR(page)) 12380da74120SJann Horn return PTR_ERR(page); 12390da74120SJann Horn 12400619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12411da177e4SLinus Torvalds 12426b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12436b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1244be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1245be0554c9SStephen Smalley NULL); 12461da177e4SLinus Torvalds if (length) 12471da177e4SLinus Torvalds goto out; 12481da177e4SLinus Torvalds 1249d313f948SStephen Smalley length = -EINVAL; 12500619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 12510619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1252d313f948SStephen Smalley goto out; 1253d313f948SStephen Smalley 12541da177e4SLinus Torvalds length = -EINVAL; 12551da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12561da177e4SLinus Torvalds goto out; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds if (new_value) 12591da177e4SLinus Torvalds new_value = 1; 12601da177e4SLinus Torvalds 12610619f0f5SStephen Smalley fsi->bool_pending_values[index] = new_value; 12621da177e4SLinus Torvalds length = count; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds out: 12650619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12668365a719SAl Viro kfree(page); 12671da177e4SLinus Torvalds return length; 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds 12709c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 12711da177e4SLinus Torvalds .read = sel_read_bool, 12721da177e4SLinus Torvalds .write = sel_write_bool, 127357a62c23SArnd Bergmann .llseek = generic_file_llseek, 12741da177e4SLinus Torvalds }; 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 12771da177e4SLinus Torvalds const char __user *buf, 12781da177e4SLinus Torvalds size_t count, loff_t *ppos) 12791da177e4SLinus Torvalds { 12800619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12811da177e4SLinus Torvalds char *page = NULL; 1282d313f948SStephen Smalley ssize_t length; 12831da177e4SLinus Torvalds int new_value; 12841da177e4SLinus Torvalds 12850da74120SJann Horn if (count >= PAGE_SIZE) 12860da74120SJann Horn return -ENOMEM; 12870da74120SJann Horn 12880da74120SJann Horn /* No partial writes. */ 12890da74120SJann Horn if (*ppos != 0) 12900da74120SJann Horn return -EINVAL; 12910da74120SJann Horn 12920da74120SJann Horn page = memdup_user_nul(buf, count); 12930da74120SJann Horn if (IS_ERR(page)) 12940da74120SJann Horn return PTR_ERR(page); 12950da74120SJann Horn 12960619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12971da177e4SLinus Torvalds 12986b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12996b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1300be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1301be0554c9SStephen Smalley NULL); 13021da177e4SLinus Torvalds if (length) 13031da177e4SLinus Torvalds goto out; 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds length = -EINVAL; 13061da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 13071da177e4SLinus Torvalds goto out; 13081da177e4SLinus Torvalds 1309b77a493bSEric Paris length = 0; 13100619f0f5SStephen Smalley if (new_value && fsi->bool_pending_values) 13110619f0f5SStephen Smalley length = security_set_bools(fsi->state, fsi->bool_num, 13120619f0f5SStephen Smalley fsi->bool_pending_values); 13131da177e4SLinus Torvalds 1314b77a493bSEric Paris if (!length) 13151da177e4SLinus Torvalds length = count; 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds out: 13180619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 13198365a719SAl Viro kfree(page); 13201da177e4SLinus Torvalds return length; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds 13239c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 13241da177e4SLinus Torvalds .write = sel_commit_bools_write, 132557a62c23SArnd Bergmann .llseek = generic_file_llseek, 13261da177e4SLinus Torvalds }; 13271da177e4SLinus Torvalds 13280c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 13291da177e4SLinus Torvalds { 1330ad52184bSAl Viro d_genocide(de); 1331ad52184bSAl Viro shrink_dcache_parent(de); 13321da177e4SLinus Torvalds } 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 13351da177e4SLinus Torvalds 13360619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi) 13371da177e4SLinus Torvalds { 133860abd318SOndrej Mosnacek int ret; 13391da177e4SLinus Torvalds ssize_t len; 13401da177e4SLinus Torvalds struct dentry *dentry = NULL; 13410619f0f5SStephen Smalley struct dentry *dir = fsi->bool_dir; 13421da177e4SLinus Torvalds struct inode *inode = NULL; 13431da177e4SLinus Torvalds struct inode_security_struct *isec; 13441da177e4SLinus Torvalds char **names = NULL, *page; 134560abd318SOndrej Mosnacek u32 i, num; 13461da177e4SLinus Torvalds int *values = NULL; 13471da177e4SLinus Torvalds u32 sid; 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds /* remove any existing files */ 13500619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 13510619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 13520619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 13530619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 13540619f0f5SStephen Smalley fsi->bool_num = 0; 13550619f0f5SStephen Smalley fsi->bool_pending_names = NULL; 13560619f0f5SStephen Smalley fsi->bool_pending_values = NULL; 13571da177e4SLinus Torvalds 13580c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 13591da177e4SLinus Torvalds 1360b77a493bSEric Paris ret = -ENOMEM; 13611872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 13621872981bSEric Paris if (!page) 1363b77a493bSEric Paris goto out; 13641da177e4SLinus Torvalds 13650619f0f5SStephen Smalley ret = security_get_bools(fsi->state, &num, &names, &values); 1366b77a493bSEric Paris if (ret) 13671da177e4SLinus Torvalds goto out; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1370b77a493bSEric Paris ret = -ENOMEM; 13711da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1372b77a493bSEric Paris if (!dentry) 1373b77a493bSEric Paris goto out; 13741da177e4SLinus Torvalds 1375b77a493bSEric Paris ret = -ENOMEM; 1376b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 13777e4237faSnixiaoming if (!inode) { 13787e4237faSnixiaoming dput(dentry); 1379b77a493bSEric Paris goto out; 13807e4237faSnixiaoming } 1381b77a493bSEric Paris 13821da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1383cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 13847e4237faSnixiaoming if (len >= PAGE_SIZE) { 13857e4237faSnixiaoming dput(dentry); 13867e4237faSnixiaoming iput(inode); 1387b77a493bSEric Paris goto out; 13887e4237faSnixiaoming } 1389b77a493bSEric Paris 139080788c22SCasey Schaufler isec = selinux_inode(inode); 13910619f0f5SStephen Smalley ret = security_genfs_sid(fsi->state, "selinuxfs", page, 1392aa8e712cSStephen Smalley SECCLASS_FILE, &sid); 13934262fb51SGary Tierney if (ret) { 1394900fde06SGary Tierney pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", 1395900fde06SGary Tierney page); 1396900fde06SGary Tierney sid = SECINITSID_SECURITY; 13974262fb51SGary Tierney } 13984262fb51SGary Tierney 13991da177e4SLinus Torvalds isec->sid = sid; 140042059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 14011da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1402bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 14031da177e4SLinus Torvalds d_add(dentry, inode); 14041da177e4SLinus Torvalds } 14050619f0f5SStephen Smalley fsi->bool_num = num; 14060619f0f5SStephen Smalley fsi->bool_pending_names = names; 14070619f0f5SStephen Smalley fsi->bool_pending_values = values; 1408b77a493bSEric Paris 1409b77a493bSEric Paris free_page((unsigned long)page); 1410b77a493bSEric Paris return 0; 14111da177e4SLinus Torvalds out: 14121da177e4SLinus Torvalds free_page((unsigned long)page); 1413b77a493bSEric Paris 14141da177e4SLinus Torvalds if (names) { 14159a5f04bfSJesper Juhl for (i = 0; i < num; i++) 14161da177e4SLinus Torvalds kfree(names[i]); 14171da177e4SLinus Torvalds kfree(names); 14181da177e4SLinus Torvalds } 141920c19e41SDavi Arnaut kfree(values); 14200c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1421b77a493bSEric Paris 1422b77a493bSEric Paris return ret; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 14261da177e4SLinus Torvalds size_t count, loff_t *ppos) 14271da177e4SLinus Torvalds { 14286b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14296b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14301da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 14311da177e4SLinus Torvalds ssize_t length; 14321da177e4SLinus Torvalds 14336b6bc620SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 14346b6bc620SStephen Smalley avc_get_cache_threshold(state->avc)); 14351da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 14381da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 14391da177e4SLinus Torvalds const char __user *buf, 14401da177e4SLinus Torvalds size_t count, loff_t *ppos) 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds { 14436b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 14446b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14458365a719SAl Viro char *page; 14461da177e4SLinus Torvalds ssize_t ret; 1447309c5fadSHeinrich Schuchardt unsigned int new_value; 14481da177e4SLinus Torvalds 14496b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 14506b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1451be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETSECPARAM, 1452be0554c9SStephen Smalley NULL); 14531da177e4SLinus Torvalds if (ret) 14548365a719SAl Viro return ret; 1455b77a493bSEric Paris 1456b77a493bSEric Paris if (count >= PAGE_SIZE) 14578365a719SAl Viro return -ENOMEM; 1458b77a493bSEric Paris 1459b77a493bSEric Paris /* No partial writes. */ 1460b77a493bSEric Paris if (*ppos != 0) 14618365a719SAl Viro return -EINVAL; 1462b77a493bSEric Paris 14638365a719SAl Viro page = memdup_user_nul(buf, count); 14648365a719SAl Viro if (IS_ERR(page)) 14658365a719SAl Viro return PTR_ERR(page); 1466b77a493bSEric Paris 1467b77a493bSEric Paris ret = -EINVAL; 1468b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1469b77a493bSEric Paris goto out; 1470b77a493bSEric Paris 14716b6bc620SStephen Smalley avc_set_cache_threshold(state->avc, new_value); 1472b77a493bSEric Paris 14731da177e4SLinus Torvalds ret = count; 14741da177e4SLinus Torvalds out: 14758365a719SAl Viro kfree(page); 14761da177e4SLinus Torvalds return ret; 14771da177e4SLinus Torvalds } 14781da177e4SLinus Torvalds 14791da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 14801da177e4SLinus Torvalds size_t count, loff_t *ppos) 14811da177e4SLinus Torvalds { 14826b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14836b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14841da177e4SLinus Torvalds char *page; 1485b77a493bSEric Paris ssize_t length; 14861da177e4SLinus Torvalds 14871da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1488b77a493bSEric Paris if (!page) 1489b77a493bSEric Paris return -ENOMEM; 1490b77a493bSEric Paris 14916b6bc620SStephen Smalley length = avc_get_hash_stats(state->avc, page); 1492b77a493bSEric Paris if (length >= 0) 1493b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 14941da177e4SLinus Torvalds free_page((unsigned long)page); 1495b77a493bSEric Paris 1496b77a493bSEric Paris return length; 14971da177e4SLinus Torvalds } 14981da177e4SLinus Torvalds 149966f8e2f0SJeff Vander Stoep static ssize_t sel_read_sidtab_hash_stats(struct file *filp, char __user *buf, 150066f8e2f0SJeff Vander Stoep size_t count, loff_t *ppos) 150166f8e2f0SJeff Vander Stoep { 150266f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 150366f8e2f0SJeff Vander Stoep struct selinux_state *state = fsi->state; 150466f8e2f0SJeff Vander Stoep char *page; 150566f8e2f0SJeff Vander Stoep ssize_t length; 150666f8e2f0SJeff Vander Stoep 150766f8e2f0SJeff Vander Stoep page = (char *)__get_free_page(GFP_KERNEL); 150866f8e2f0SJeff Vander Stoep if (!page) 150966f8e2f0SJeff Vander Stoep return -ENOMEM; 151066f8e2f0SJeff Vander Stoep 151166f8e2f0SJeff Vander Stoep length = security_sidtab_hash_stats(state, page); 151266f8e2f0SJeff Vander Stoep if (length >= 0) 151366f8e2f0SJeff Vander Stoep length = simple_read_from_buffer(buf, count, ppos, page, 151466f8e2f0SJeff Vander Stoep length); 151566f8e2f0SJeff Vander Stoep free_page((unsigned long)page); 151666f8e2f0SJeff Vander Stoep 151766f8e2f0SJeff Vander Stoep return length; 151866f8e2f0SJeff Vander Stoep } 151966f8e2f0SJeff Vander Stoep 152066f8e2f0SJeff Vander Stoep static const struct file_operations sel_sidtab_hash_stats_ops = { 152166f8e2f0SJeff Vander Stoep .read = sel_read_sidtab_hash_stats, 152266f8e2f0SJeff Vander Stoep .llseek = generic_file_llseek, 152366f8e2f0SJeff Vander Stoep }; 152466f8e2f0SJeff Vander Stoep 15259c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 15261da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 15271da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 152857a62c23SArnd Bergmann .llseek = generic_file_llseek, 15291da177e4SLinus Torvalds }; 15301da177e4SLinus Torvalds 15319c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 15321da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 153357a62c23SArnd Bergmann .llseek = generic_file_llseek, 15341da177e4SLinus Torvalds }; 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15371da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 15381da177e4SLinus Torvalds { 15391da177e4SLinus Torvalds int cpu; 15401da177e4SLinus Torvalds 15414f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 15421da177e4SLinus Torvalds if (!cpu_possible(cpu)) 15431da177e4SLinus Torvalds continue; 15441da177e4SLinus Torvalds *idx = cpu + 1; 15451da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 15461da177e4SLinus Torvalds } 15478d269a8eSVasily Averin (*idx)++; 15481da177e4SLinus Torvalds return NULL; 15491da177e4SLinus Torvalds } 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 15521da177e4SLinus Torvalds { 15531da177e4SLinus Torvalds loff_t n = *pos - 1; 15541da177e4SLinus Torvalds 15551da177e4SLinus Torvalds if (*pos == 0) 15561da177e4SLinus Torvalds return SEQ_START_TOKEN; 15571da177e4SLinus Torvalds 15581da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds 15611da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 15621da177e4SLinus Torvalds { 15631da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 15641da177e4SLinus Torvalds } 15651da177e4SLinus Torvalds 15661da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 15671da177e4SLinus Torvalds { 15681da177e4SLinus Torvalds struct avc_cache_stats *st = v; 15691da177e4SLinus Torvalds 1570710a0647SMarkus Elfring if (v == SEQ_START_TOKEN) { 1571710a0647SMarkus Elfring seq_puts(seq, 1572710a0647SMarkus Elfring "lookups hits misses allocations reclaims frees\n"); 1573710a0647SMarkus Elfring } else { 1574257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1575257313b2SLinus Torvalds unsigned int misses = st->misses; 1576257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1577257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1578257313b2SLinus Torvalds hits, misses, st->allocations, 15791da177e4SLinus Torvalds st->reclaims, st->frees); 1580257313b2SLinus Torvalds } 15811da177e4SLinus Torvalds return 0; 15821da177e4SLinus Torvalds } 15831da177e4SLinus Torvalds 15841da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 15851da177e4SLinus Torvalds { } 15861da177e4SLinus Torvalds 15871996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 15881da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 15891da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 15901da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 15911da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 15921da177e4SLinus Torvalds }; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 15951da177e4SLinus Torvalds { 15961da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 15971da177e4SLinus Torvalds } 15981da177e4SLinus Torvalds 15999c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 16001da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 16011da177e4SLinus Torvalds .read = seq_read, 16021da177e4SLinus Torvalds .llseek = seq_lseek, 16031da177e4SLinus Torvalds .release = seq_release, 16041da177e4SLinus Torvalds }; 16051da177e4SLinus Torvalds #endif 16061da177e4SLinus Torvalds 16071da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 16081da177e4SLinus Torvalds { 16090619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 16100619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1611b77a493bSEric Paris int i; 1612cda37124SEric Biggers static const struct tree_descr files[] = { 16131da177e4SLinus Torvalds { "cache_threshold", 16141da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 16151da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 16161da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 16171da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 16181da177e4SLinus Torvalds #endif 16191da177e4SLinus Torvalds }; 16201da177e4SLinus Torvalds 16216e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 16221da177e4SLinus Torvalds struct inode *inode; 16231da177e4SLinus Torvalds struct dentry *dentry; 16241da177e4SLinus Torvalds 16251da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1626b77a493bSEric Paris if (!dentry) 1627b77a493bSEric Paris return -ENOMEM; 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 16307e4237faSnixiaoming if (!inode) { 16317e4237faSnixiaoming dput(dentry); 1632b77a493bSEric Paris return -ENOMEM; 16337e4237faSnixiaoming } 1634b77a493bSEric Paris 16351da177e4SLinus Torvalds inode->i_fop = files[i].ops; 16360619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 16371da177e4SLinus Torvalds d_add(dentry, inode); 16381da177e4SLinus Torvalds } 1639b77a493bSEric Paris 1640b77a493bSEric Paris return 0; 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds 164366f8e2f0SJeff Vander Stoep static int sel_make_ss_files(struct dentry *dir) 164466f8e2f0SJeff Vander Stoep { 164566f8e2f0SJeff Vander Stoep struct super_block *sb = dir->d_sb; 164666f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = sb->s_fs_info; 164766f8e2f0SJeff Vander Stoep int i; 164866f8e2f0SJeff Vander Stoep static struct tree_descr files[] = { 164966f8e2f0SJeff Vander Stoep { "sidtab_hash_stats", &sel_sidtab_hash_stats_ops, S_IRUGO }, 165066f8e2f0SJeff Vander Stoep }; 165166f8e2f0SJeff Vander Stoep 165266f8e2f0SJeff Vander Stoep for (i = 0; i < ARRAY_SIZE(files); i++) { 165366f8e2f0SJeff Vander Stoep struct inode *inode; 165466f8e2f0SJeff Vander Stoep struct dentry *dentry; 165566f8e2f0SJeff Vander Stoep 165666f8e2f0SJeff Vander Stoep dentry = d_alloc_name(dir, files[i].name); 165766f8e2f0SJeff Vander Stoep if (!dentry) 165866f8e2f0SJeff Vander Stoep return -ENOMEM; 165966f8e2f0SJeff Vander Stoep 166066f8e2f0SJeff Vander Stoep inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 166166f8e2f0SJeff Vander Stoep if (!inode) { 166266f8e2f0SJeff Vander Stoep dput(dentry); 166366f8e2f0SJeff Vander Stoep return -ENOMEM; 166466f8e2f0SJeff Vander Stoep } 166566f8e2f0SJeff Vander Stoep 166666f8e2f0SJeff Vander Stoep inode->i_fop = files[i].ops; 166766f8e2f0SJeff Vander Stoep inode->i_ino = ++fsi->last_ino; 166866f8e2f0SJeff Vander Stoep d_add(dentry, inode); 166966f8e2f0SJeff Vander Stoep } 167066f8e2f0SJeff Vander Stoep 167166f8e2f0SJeff Vander Stoep return 0; 167266f8e2f0SJeff Vander Stoep } 167366f8e2f0SJeff Vander Stoep 1674f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1675f0ee2e46SJames Carter size_t count, loff_t *ppos) 1676f0ee2e46SJames Carter { 16770619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1678f0ee2e46SJames Carter char *con; 1679f0ee2e46SJames Carter u32 sid, len; 1680f0ee2e46SJames Carter ssize_t ret; 1681f0ee2e46SJames Carter 1682496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 16830619f0f5SStephen Smalley ret = security_sid_to_context(fsi->state, sid, &con, &len); 1684b77a493bSEric Paris if (ret) 1685f0ee2e46SJames Carter return ret; 1686f0ee2e46SJames Carter 1687f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1688f0ee2e46SJames Carter kfree(con); 1689f0ee2e46SJames Carter return ret; 1690f0ee2e46SJames Carter } 1691f0ee2e46SJames Carter 1692f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1693f0ee2e46SJames Carter .read = sel_read_initcon, 169457a62c23SArnd Bergmann .llseek = generic_file_llseek, 1695f0ee2e46SJames Carter }; 1696f0ee2e46SJames Carter 1697f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1698f0ee2e46SJames Carter { 1699b77a493bSEric Paris int i; 1700f0ee2e46SJames Carter 1701f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1702f0ee2e46SJames Carter struct inode *inode; 1703f0ee2e46SJames Carter struct dentry *dentry; 1704e3e0b582SStephen Smalley const char *s = security_get_initial_sid_context(i); 1705e3e0b582SStephen Smalley 1706e3e0b582SStephen Smalley if (!s) 1707e3e0b582SStephen Smalley continue; 1708e3e0b582SStephen Smalley dentry = d_alloc_name(dir, s); 1709b77a493bSEric Paris if (!dentry) 1710b77a493bSEric Paris return -ENOMEM; 1711f0ee2e46SJames Carter 1712f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 17137e4237faSnixiaoming if (!inode) { 17147e4237faSnixiaoming dput(dentry); 1715b77a493bSEric Paris return -ENOMEM; 17167e4237faSnixiaoming } 1717b77a493bSEric Paris 1718f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1719f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1720f0ee2e46SJames Carter d_add(dentry, inode); 1721f0ee2e46SJames Carter } 1722b77a493bSEric Paris 1723b77a493bSEric Paris return 0; 1724f0ee2e46SJames Carter } 1725f0ee2e46SJames Carter 1726e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1727e47c8fc5SChristopher J. PeBenito { 1728e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1729e47c8fc5SChristopher J. PeBenito } 1730e47c8fc5SChristopher J. PeBenito 1731e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1732e47c8fc5SChristopher J. PeBenito { 173392ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1734e47c8fc5SChristopher J. PeBenito } 1735e47c8fc5SChristopher J. PeBenito 1736e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1737e47c8fc5SChristopher J. PeBenito { 1738e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1739e47c8fc5SChristopher J. PeBenito } 1740e47c8fc5SChristopher J. PeBenito 1741e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1742e47c8fc5SChristopher J. PeBenito { 1743e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1744e47c8fc5SChristopher J. PeBenito } 1745e47c8fc5SChristopher J. PeBenito 1746e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1747e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1748e47c8fc5SChristopher J. PeBenito { 1749496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1750cc1dad71SAl Viro char res[TMPBUFLEN]; 17517e78c875Sliuyang34 ssize_t len = scnprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1752cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1753e47c8fc5SChristopher J. PeBenito } 1754e47c8fc5SChristopher J. PeBenito 1755e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1756e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 175757a62c23SArnd Bergmann .llseek = generic_file_llseek, 1758e47c8fc5SChristopher J. PeBenito }; 1759e47c8fc5SChristopher J. PeBenito 1760e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1761e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1762e47c8fc5SChristopher J. PeBenito { 1763496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1764cc1dad71SAl Viro char res[TMPBUFLEN]; 17657e78c875Sliuyang34 ssize_t len = scnprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1766cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1767e47c8fc5SChristopher J. PeBenito } 1768e47c8fc5SChristopher J. PeBenito 1769e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1770e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 177157a62c23SArnd Bergmann .llseek = generic_file_llseek, 1772e47c8fc5SChristopher J. PeBenito }; 1773e47c8fc5SChristopher J. PeBenito 17743bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 17753bb56b25SPaul Moore size_t count, loff_t *ppos) 17763bb56b25SPaul Moore { 17770619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 17783bb56b25SPaul Moore int value; 17793bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 17803bb56b25SPaul Moore ssize_t length; 1781496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 17823bb56b25SPaul Moore 17830619f0f5SStephen Smalley value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); 17843bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 17853bb56b25SPaul Moore 17863bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 17873bb56b25SPaul Moore } 17883bb56b25SPaul Moore 17893bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 17903bb56b25SPaul Moore .read = sel_read_policycap, 179157a62c23SArnd Bergmann .llseek = generic_file_llseek, 17923bb56b25SPaul Moore }; 17933bb56b25SPaul Moore 1794e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1795e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1796e47c8fc5SChristopher J. PeBenito { 17970619f0f5SStephen Smalley struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; 1798b77a493bSEric Paris int i, rc, nperms; 1799e47c8fc5SChristopher J. PeBenito char **perms; 1800e47c8fc5SChristopher J. PeBenito 18010619f0f5SStephen Smalley rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); 1802e47c8fc5SChristopher J. PeBenito if (rc) 1803b77a493bSEric Paris return rc; 1804e47c8fc5SChristopher J. PeBenito 1805e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1806e47c8fc5SChristopher J. PeBenito struct inode *inode; 1807e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1808e47c8fc5SChristopher J. PeBenito 1809b77a493bSEric Paris rc = -ENOMEM; 1810e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1811b77a493bSEric Paris if (!dentry) 1812b77a493bSEric Paris goto out; 1813e47c8fc5SChristopher J. PeBenito 1814e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1815b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 18167e4237faSnixiaoming if (!inode) { 18177e4237faSnixiaoming dput(dentry); 1818b77a493bSEric Paris goto out; 18197e4237faSnixiaoming } 1820b77a493bSEric Paris 1821e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1822e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1823e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1824e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1825e47c8fc5SChristopher J. PeBenito } 1826b77a493bSEric Paris rc = 0; 1827b77a493bSEric Paris out: 1828e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1829e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1830e47c8fc5SChristopher J. PeBenito kfree(perms); 1831e47c8fc5SChristopher J. PeBenito return rc; 1832e47c8fc5SChristopher J. PeBenito } 1833e47c8fc5SChristopher J. PeBenito 1834e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1835e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1836e47c8fc5SChristopher J. PeBenito { 18370619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 18380619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1839e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1840e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1841e47c8fc5SChristopher J. PeBenito int rc; 1842e47c8fc5SChristopher J. PeBenito 1843e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1844b77a493bSEric Paris if (!dentry) 1845b77a493bSEric Paris return -ENOMEM; 1846e47c8fc5SChristopher J. PeBenito 1847e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 18487e4237faSnixiaoming if (!inode) { 18497e4237faSnixiaoming dput(dentry); 1850b77a493bSEric Paris return -ENOMEM; 18517e4237faSnixiaoming } 1852e47c8fc5SChristopher J. PeBenito 1853e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1854e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1855e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1856e47c8fc5SChristopher J. PeBenito 18570619f0f5SStephen Smalley dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); 1858a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1859a1c2aa1eSAl Viro return PTR_ERR(dentry); 1860e47c8fc5SChristopher J. PeBenito 1861e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1862e47c8fc5SChristopher J. PeBenito 1863e47c8fc5SChristopher J. PeBenito return rc; 1864e47c8fc5SChristopher J. PeBenito } 1865e47c8fc5SChristopher J. PeBenito 18660619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi) 1867e47c8fc5SChristopher J. PeBenito { 18680619f0f5SStephen Smalley 1869b77a493bSEric Paris int rc, nclasses, i; 1870e47c8fc5SChristopher J. PeBenito char **classes; 1871e47c8fc5SChristopher J. PeBenito 1872e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 18730619f0f5SStephen Smalley sel_remove_entries(fsi->class_dir); 1874e47c8fc5SChristopher J. PeBenito 18750619f0f5SStephen Smalley rc = security_get_classes(fsi->state, &classes, &nclasses); 1876b77a493bSEric Paris if (rc) 1877b77a493bSEric Paris return rc; 1878e47c8fc5SChristopher J. PeBenito 1879e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 18800619f0f5SStephen Smalley fsi->last_class_ino = sel_class_to_ino(nclasses + 2); 1881e47c8fc5SChristopher J. PeBenito 1882e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1883e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1884e47c8fc5SChristopher J. PeBenito 18850619f0f5SStephen Smalley class_name_dir = sel_make_dir(fsi->class_dir, classes[i], 18860619f0f5SStephen Smalley &fsi->last_class_ino); 1887a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1888a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1889b77a493bSEric Paris goto out; 1890a1c2aa1eSAl Viro } 1891e47c8fc5SChristopher J. PeBenito 1892e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1893e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1894e47c8fc5SChristopher J. PeBenito class_name_dir); 1895e47c8fc5SChristopher J. PeBenito if (rc) 1896b77a493bSEric Paris goto out; 1897e47c8fc5SChristopher J. PeBenito } 1898b77a493bSEric Paris rc = 0; 1899b77a493bSEric Paris out: 1900e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1901e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1902e47c8fc5SChristopher J. PeBenito kfree(classes); 1903e47c8fc5SChristopher J. PeBenito return rc; 1904e47c8fc5SChristopher J. PeBenito } 1905e47c8fc5SChristopher J. PeBenito 19060619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi) 19073bb56b25SPaul Moore { 19083bb56b25SPaul Moore unsigned int iter; 19093bb56b25SPaul Moore struct dentry *dentry = NULL; 19103bb56b25SPaul Moore struct inode *inode = NULL; 19113bb56b25SPaul Moore 19120619f0f5SStephen Smalley sel_remove_entries(fsi->policycap_dir); 19133bb56b25SPaul Moore 19143bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 19154dc2fce3SStephen Smalley if (iter < ARRAY_SIZE(selinux_policycap_names)) 19160619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, 19174dc2fce3SStephen Smalley selinux_policycap_names[iter]); 19183bb56b25SPaul Moore else 19190619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, "unknown"); 19203bb56b25SPaul Moore 19213bb56b25SPaul Moore if (dentry == NULL) 19223bb56b25SPaul Moore return -ENOMEM; 19233bb56b25SPaul Moore 19240619f0f5SStephen Smalley inode = sel_make_inode(fsi->sb, S_IFREG | 0444); 19257e4237faSnixiaoming if (inode == NULL) { 19267e4237faSnixiaoming dput(dentry); 19273bb56b25SPaul Moore return -ENOMEM; 19287e4237faSnixiaoming } 19293bb56b25SPaul Moore 19303bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 19313bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 19323bb56b25SPaul Moore d_add(dentry, inode); 19333bb56b25SPaul Moore } 19343bb56b25SPaul Moore 19353bb56b25SPaul Moore return 0; 19363bb56b25SPaul Moore } 19373bb56b25SPaul Moore 1938a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 19390dd4ae51SChristopher J. PeBenito unsigned long *ino) 19401da177e4SLinus Torvalds { 1941a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 19421da177e4SLinus Torvalds struct inode *inode; 19431da177e4SLinus Torvalds 1944a1c2aa1eSAl Viro if (!dentry) 1945a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1946a1c2aa1eSAl Viro 1947a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1948a1c2aa1eSAl Viro if (!inode) { 1949a1c2aa1eSAl Viro dput(dentry); 1950a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1951a1c2aa1eSAl Viro } 1952b77a493bSEric Paris 19531da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 19541da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 19550dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 195640e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1957d8c76e6fSDave Hansen inc_nlink(inode); 19581da177e4SLinus Torvalds d_add(dentry, inode); 1959edb20fb5SJames Morris /* bump link count on parent directory, too */ 1960ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1961b77a493bSEric Paris 1962a1c2aa1eSAl Viro return dentry; 19631da177e4SLinus Torvalds } 19641da177e4SLinus Torvalds 19650619f0f5SStephen Smalley #define NULL_FILE_NAME "null" 19660619f0f5SStephen Smalley 1967920f50b2SDavid Howells static int sel_fill_super(struct super_block *sb, struct fs_context *fc) 19681da177e4SLinus Torvalds { 19690619f0f5SStephen Smalley struct selinux_fs_info *fsi; 19701da177e4SLinus Torvalds int ret; 19711da177e4SLinus Torvalds struct dentry *dentry; 1972a1c2aa1eSAl Viro struct inode *inode; 19731da177e4SLinus Torvalds struct inode_security_struct *isec; 19741da177e4SLinus Torvalds 1975cda37124SEric Biggers static const struct tree_descr selinux_files[] = { 19761da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 19771da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1978ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 19791da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 19801da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 19811da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 19821da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 19831da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 19841da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 19851da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 19861da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 19871da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 19881da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 19893f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 19903f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 199111904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 199272e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1993f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1994f9df6458SAndrew Perepechko S_IWUGO}, 19951da177e4SLinus Torvalds /* last one */ {""} 19961da177e4SLinus Torvalds }; 19970619f0f5SStephen Smalley 19980619f0f5SStephen Smalley ret = selinux_fs_info_create(sb); 19990619f0f5SStephen Smalley if (ret) 20000619f0f5SStephen Smalley goto err; 20010619f0f5SStephen Smalley 20021da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 20031da177e4SLinus Torvalds if (ret) 2004161ce45aSJames Morris goto err; 20051da177e4SLinus Torvalds 20060619f0f5SStephen Smalley fsi = sb->s_fs_info; 20070619f0f5SStephen Smalley fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); 20080619f0f5SStephen Smalley if (IS_ERR(fsi->bool_dir)) { 20090619f0f5SStephen Smalley ret = PTR_ERR(fsi->bool_dir); 20100619f0f5SStephen Smalley fsi->bool_dir = NULL; 2011161ce45aSJames Morris goto err; 2012a1c2aa1eSAl Viro } 20131da177e4SLinus Torvalds 2014b77a493bSEric Paris ret = -ENOMEM; 20151da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 2016b77a493bSEric Paris if (!dentry) 2017161ce45aSJames Morris goto err; 20181da177e4SLinus Torvalds 2019161ce45aSJames Morris ret = -ENOMEM; 2020b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 20217e4237faSnixiaoming if (!inode) { 20227e4237faSnixiaoming dput(dentry); 2023161ce45aSJames Morris goto err; 20247e4237faSnixiaoming } 2025b77a493bSEric Paris 20260619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 202780788c22SCasey Schaufler isec = selinux_inode(inode); 20281da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 20291da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 203042059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 20331da177e4SLinus Torvalds d_add(dentry, inode); 20341da177e4SLinus Torvalds 20350619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); 2036a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2037a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2038161ce45aSJames Morris goto err; 2039a1c2aa1eSAl Viro } 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 204266f8e2f0SJeff Vander Stoep 204366f8e2f0SJeff Vander Stoep dentry = sel_make_dir(sb->s_root, "ss", &fsi->last_ino); 204466f8e2f0SJeff Vander Stoep if (IS_ERR(dentry)) { 204566f8e2f0SJeff Vander Stoep ret = PTR_ERR(dentry); 204666f8e2f0SJeff Vander Stoep goto err; 204766f8e2f0SJeff Vander Stoep } 204866f8e2f0SJeff Vander Stoep 204966f8e2f0SJeff Vander Stoep ret = sel_make_ss_files(dentry); 20501da177e4SLinus Torvalds if (ret) 2051161ce45aSJames Morris goto err; 2052f0ee2e46SJames Carter 20530619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); 2054a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2055a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2056f0ee2e46SJames Carter goto err; 2057a1c2aa1eSAl Viro } 2058f0ee2e46SJames Carter 2059f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 2060f0ee2e46SJames Carter if (ret) 2061f0ee2e46SJames Carter goto err; 2062f0ee2e46SJames Carter 20630619f0f5SStephen Smalley fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); 20640619f0f5SStephen Smalley if (IS_ERR(fsi->class_dir)) { 20650619f0f5SStephen Smalley ret = PTR_ERR(fsi->class_dir); 20660619f0f5SStephen Smalley fsi->class_dir = NULL; 2067e47c8fc5SChristopher J. PeBenito goto err; 2068a1c2aa1eSAl Viro } 2069e47c8fc5SChristopher J. PeBenito 20700619f0f5SStephen Smalley fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", 20710619f0f5SStephen Smalley &fsi->last_ino); 20720619f0f5SStephen Smalley if (IS_ERR(fsi->policycap_dir)) { 20730619f0f5SStephen Smalley ret = PTR_ERR(fsi->policycap_dir); 20740619f0f5SStephen Smalley fsi->policycap_dir = NULL; 2075e47c8fc5SChristopher J. PeBenito goto err; 2076a1c2aa1eSAl Viro } 20770619f0f5SStephen Smalley 20780619f0f5SStephen Smalley ret = sel_make_policy_nodes(fsi); 20790619f0f5SStephen Smalley if (ret) 20800619f0f5SStephen Smalley goto err; 2081b77a493bSEric Paris return 0; 2082161ce45aSJames Morris err: 2083f8b69a5fSpeter enderborg pr_err("SELinux: %s: failed while creating inodes\n", 2084744ba35eSEric Paris __func__); 20850619f0f5SStephen Smalley 20860619f0f5SStephen Smalley selinux_fs_info_free(sb); 20870619f0f5SStephen Smalley 2088b77a493bSEric Paris return ret; 20891da177e4SLinus Torvalds } 20901da177e4SLinus Torvalds 2091920f50b2SDavid Howells static int sel_get_tree(struct fs_context *fc) 20921da177e4SLinus Torvalds { 2093920f50b2SDavid Howells return get_tree_single(fc, sel_fill_super); 2094920f50b2SDavid Howells } 2095920f50b2SDavid Howells 2096920f50b2SDavid Howells static const struct fs_context_operations sel_context_ops = { 2097920f50b2SDavid Howells .get_tree = sel_get_tree, 2098920f50b2SDavid Howells }; 2099920f50b2SDavid Howells 2100920f50b2SDavid Howells static int sel_init_fs_context(struct fs_context *fc) 2101920f50b2SDavid Howells { 2102920f50b2SDavid Howells fc->ops = &sel_context_ops; 2103920f50b2SDavid Howells return 0; 21041da177e4SLinus Torvalds } 21051da177e4SLinus Torvalds 21060619f0f5SStephen Smalley static void sel_kill_sb(struct super_block *sb) 21070619f0f5SStephen Smalley { 21080619f0f5SStephen Smalley selinux_fs_info_free(sb); 21090619f0f5SStephen Smalley kill_litter_super(sb); 21100619f0f5SStephen Smalley } 21110619f0f5SStephen Smalley 21121da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 21131da177e4SLinus Torvalds .name = "selinuxfs", 2114920f50b2SDavid Howells .init_fs_context = sel_init_fs_context, 21150619f0f5SStephen Smalley .kill_sb = sel_kill_sb, 21161da177e4SLinus Torvalds }; 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 21190619f0f5SStephen Smalley struct path selinux_null; 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds static int __init init_sel_fs(void) 21221da177e4SLinus Torvalds { 21230619f0f5SStephen Smalley struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, 21240619f0f5SStephen Smalley sizeof(NULL_FILE_NAME)-1); 21251da177e4SLinus Torvalds int err; 21261da177e4SLinus Torvalds 21276c5a682eSStephen Smalley if (!selinux_enabled_boot) 21281da177e4SLinus Torvalds return 0; 21297a627e3bSGreg Kroah-Hartman 2130f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 2131f9bb4882SEric W. Biederman if (err) 2132f9bb4882SEric W. Biederman return err; 21337a627e3bSGreg Kroah-Hartman 21341da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 21357a627e3bSGreg Kroah-Hartman if (err) { 2136f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2137b77a493bSEric Paris return err; 21387a627e3bSGreg Kroah-Hartman } 2139b77a493bSEric Paris 2140765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 21411da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 2142f8b69a5fSpeter enderborg pr_err("selinuxfs: could not mount!\n"); 21431da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 21441da177e4SLinus Torvalds selinuxfs_mount = NULL; 21451da177e4SLinus Torvalds } 21460619f0f5SStephen Smalley selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, 21470619f0f5SStephen Smalley &null_name); 21480619f0f5SStephen Smalley if (IS_ERR(selinux_null.dentry)) { 21490619f0f5SStephen Smalley pr_err("selinuxfs: could not lookup null!\n"); 21500619f0f5SStephen Smalley err = PTR_ERR(selinux_null.dentry); 21510619f0f5SStephen Smalley selinux_null.dentry = NULL; 21520619f0f5SStephen Smalley } 2153b77a493bSEric Paris 21541da177e4SLinus Torvalds return err; 21551da177e4SLinus Torvalds } 21561da177e4SLinus Torvalds 21571da177e4SLinus Torvalds __initcall(init_sel_fs); 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 21601da177e4SLinus Torvalds void exit_sel_fs(void) 21611da177e4SLinus Torvalds { 2162f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2163fd40ffc7SStephen Smalley dput(selinux_null.dentry); 2164423e0ab0STim Chen kern_unmount(selinuxfs_mount); 21651da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 21661da177e4SLinus Torvalds } 21671da177e4SLinus Torvalds #endif 2168