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 */ 34902a52c5cSStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi, 35002a52c5cSStephen Smalley struct selinux_policy *newpolicy); 35102a52c5cSStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi, 35202a52c5cSStephen Smalley struct selinux_policy *newpolicy); 353e47c8fc5SChristopher J. PeBenito 354e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 355a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 356e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3571da177e4SLinus Torvalds 3581da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3591da177e4SLinus Torvalds size_t count, loff_t *ppos) 3601da177e4SLinus Torvalds { 3610619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 3621da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3631da177e4SLinus Torvalds ssize_t length; 3641da177e4SLinus Torvalds 3650719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3660619f0f5SStephen Smalley security_mls_enabled(fsi->state)); 3671da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3681da177e4SLinus Torvalds } 3691da177e4SLinus Torvalds 3709c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3711da177e4SLinus Torvalds .read = sel_read_mls, 37257a62c23SArnd Bergmann .llseek = generic_file_llseek, 3731da177e4SLinus Torvalds }; 3741da177e4SLinus Torvalds 375cee74f47SEric Paris struct policy_load_memory { 376cee74f47SEric Paris size_t len; 377cee74f47SEric Paris void *data; 378cee74f47SEric Paris }; 379cee74f47SEric Paris 380cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 381cee74f47SEric Paris { 3820619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 3830619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 384cee74f47SEric Paris struct policy_load_memory *plm = NULL; 385cee74f47SEric Paris int rc; 386cee74f47SEric Paris 387cee74f47SEric Paris BUG_ON(filp->private_data); 388cee74f47SEric Paris 3890619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 390cee74f47SEric Paris 3916b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 3926b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 393be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 394cee74f47SEric Paris if (rc) 395cee74f47SEric Paris goto err; 396cee74f47SEric Paris 397cee74f47SEric Paris rc = -EBUSY; 3980619f0f5SStephen Smalley if (fsi->policy_opened) 399cee74f47SEric Paris goto err; 400cee74f47SEric Paris 401cee74f47SEric Paris rc = -ENOMEM; 402cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 403cee74f47SEric Paris if (!plm) 404cee74f47SEric Paris goto err; 405cee74f47SEric Paris 4060619f0f5SStephen Smalley if (i_size_read(inode) != security_policydb_len(state)) { 4075955102cSAl Viro inode_lock(inode); 4080619f0f5SStephen Smalley i_size_write(inode, security_policydb_len(state)); 4095955102cSAl Viro inode_unlock(inode); 410cee74f47SEric Paris } 411cee74f47SEric Paris 4120619f0f5SStephen Smalley rc = security_read_policy(state, &plm->data, &plm->len); 413cee74f47SEric Paris if (rc) 414cee74f47SEric Paris goto err; 415cee74f47SEric Paris 4160619f0f5SStephen Smalley fsi->policy_opened = 1; 417cee74f47SEric Paris 418cee74f47SEric Paris filp->private_data = plm; 419cee74f47SEric Paris 4200619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 421cee74f47SEric Paris 422cee74f47SEric Paris return 0; 423cee74f47SEric Paris err: 4240619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 425cee74f47SEric Paris 426cee74f47SEric Paris if (plm) 427cee74f47SEric Paris vfree(plm->data); 428cee74f47SEric Paris kfree(plm); 429cee74f47SEric Paris return rc; 430cee74f47SEric Paris } 431cee74f47SEric Paris 432cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 433cee74f47SEric Paris { 4340619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 435cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 436cee74f47SEric Paris 437cee74f47SEric Paris BUG_ON(!plm); 438cee74f47SEric Paris 4390619f0f5SStephen Smalley fsi->policy_opened = 0; 440cee74f47SEric Paris 441cee74f47SEric Paris vfree(plm->data); 442cee74f47SEric Paris kfree(plm); 443cee74f47SEric Paris 444cee74f47SEric Paris return 0; 445cee74f47SEric Paris } 446cee74f47SEric Paris 447cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 448cee74f47SEric Paris size_t count, loff_t *ppos) 449cee74f47SEric Paris { 450cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 451cee74f47SEric Paris int ret; 452cee74f47SEric Paris 4536b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 4546b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 455be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 456cee74f47SEric Paris if (ret) 457cee74f47SEric Paris return ret; 4580da74120SJann Horn 4590da74120SJann Horn return simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 460cee74f47SEric Paris } 461cee74f47SEric Paris 462ac9a1f6dSSouptick Joarder static vm_fault_t sel_mmap_policy_fault(struct vm_fault *vmf) 463845ca30fSEric Paris { 46411bac800SDave Jiang struct policy_load_memory *plm = vmf->vma->vm_file->private_data; 465845ca30fSEric Paris unsigned long offset; 466845ca30fSEric Paris struct page *page; 467845ca30fSEric Paris 468845ca30fSEric Paris if (vmf->flags & (FAULT_FLAG_MKWRITE | FAULT_FLAG_WRITE)) 469845ca30fSEric Paris return VM_FAULT_SIGBUS; 470845ca30fSEric Paris 471845ca30fSEric Paris offset = vmf->pgoff << PAGE_SHIFT; 472845ca30fSEric Paris if (offset >= roundup(plm->len, PAGE_SIZE)) 473845ca30fSEric Paris return VM_FAULT_SIGBUS; 474845ca30fSEric Paris 475845ca30fSEric Paris page = vmalloc_to_page(plm->data + offset); 476845ca30fSEric Paris get_page(page); 477845ca30fSEric Paris 478845ca30fSEric Paris vmf->page = page; 479845ca30fSEric Paris 480845ca30fSEric Paris return 0; 481845ca30fSEric Paris } 482845ca30fSEric Paris 4837cbea8dcSKirill A. Shutemov static const struct vm_operations_struct sel_mmap_policy_ops = { 484845ca30fSEric Paris .fault = sel_mmap_policy_fault, 485845ca30fSEric Paris .page_mkwrite = sel_mmap_policy_fault, 486845ca30fSEric Paris }; 487845ca30fSEric Paris 488ad3fa08cSJames Morris static int sel_mmap_policy(struct file *filp, struct vm_area_struct *vma) 489845ca30fSEric Paris { 490845ca30fSEric Paris if (vma->vm_flags & VM_SHARED) { 491845ca30fSEric Paris /* do not allow mprotect to make mapping writable */ 492845ca30fSEric Paris vma->vm_flags &= ~VM_MAYWRITE; 493845ca30fSEric Paris 494845ca30fSEric Paris if (vma->vm_flags & VM_WRITE) 495845ca30fSEric Paris return -EACCES; 496845ca30fSEric Paris } 497845ca30fSEric Paris 498314e51b9SKonstantin Khlebnikov vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; 499845ca30fSEric Paris vma->vm_ops = &sel_mmap_policy_ops; 500845ca30fSEric Paris 501845ca30fSEric Paris return 0; 502845ca30fSEric Paris } 503845ca30fSEric Paris 504cee74f47SEric Paris static const struct file_operations sel_policy_ops = { 505cee74f47SEric Paris .open = sel_open_policy, 506cee74f47SEric Paris .read = sel_read_policy, 507845ca30fSEric Paris .mmap = sel_mmap_policy, 508cee74f47SEric Paris .release = sel_release_policy, 50947a93a5bSEric Paris .llseek = generic_file_llseek, 510cee74f47SEric Paris }; 511cee74f47SEric Paris 51202a52c5cSStephen Smalley static int sel_make_policy_nodes(struct selinux_fs_info *fsi, 51302a52c5cSStephen Smalley struct selinux_policy *newpolicy) 5140619f0f5SStephen Smalley { 5150619f0f5SStephen Smalley int ret; 5160619f0f5SStephen Smalley 51702a52c5cSStephen Smalley ret = sel_make_bools(fsi, newpolicy); 5180619f0f5SStephen Smalley if (ret) { 5190619f0f5SStephen Smalley pr_err("SELinux: failed to load policy booleans\n"); 5200619f0f5SStephen Smalley return ret; 5210619f0f5SStephen Smalley } 5220619f0f5SStephen Smalley 52302a52c5cSStephen Smalley ret = sel_make_classes(fsi, newpolicy); 5240619f0f5SStephen Smalley if (ret) { 5250619f0f5SStephen Smalley pr_err("SELinux: failed to load policy classes\n"); 5260619f0f5SStephen Smalley return ret; 5270619f0f5SStephen Smalley } 5280619f0f5SStephen Smalley 5290619f0f5SStephen Smalley return 0; 5300619f0f5SStephen Smalley } 5310619f0f5SStephen Smalley 5321da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5331da177e4SLinus Torvalds size_t count, loff_t *ppos) 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds { 5360619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 53702a52c5cSStephen Smalley struct selinux_policy *newpolicy; 5381da177e4SLinus Torvalds ssize_t length; 5391da177e4SLinus Torvalds void *data = NULL; 5401da177e4SLinus Torvalds 5410619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 5421da177e4SLinus Torvalds 5436b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5446b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 545be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); 5461da177e4SLinus Torvalds if (length) 5471da177e4SLinus Torvalds goto out; 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds /* No partial writes. */ 5501da177e4SLinus Torvalds length = -EINVAL; 551b77a493bSEric Paris if (*ppos != 0) 5521da177e4SLinus Torvalds goto out; 5531da177e4SLinus Torvalds 554b77a493bSEric Paris length = -ENOMEM; 555b77a493bSEric Paris data = vmalloc(count); 556b77a493bSEric Paris if (!data) 557b77a493bSEric Paris goto out; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds length = -EFAULT; 5601da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5611da177e4SLinus Torvalds goto out; 5621da177e4SLinus Torvalds 56302a52c5cSStephen Smalley length = security_load_policy(fsi->state, data, count, &newpolicy); 5644262fb51SGary Tierney if (length) { 5654262fb51SGary Tierney pr_warn_ratelimited("SELinux: failed to load policy\n"); 5661da177e4SLinus Torvalds goto out; 5674262fb51SGary Tierney } 5681da177e4SLinus Torvalds 56902a52c5cSStephen Smalley length = sel_make_policy_nodes(fsi, newpolicy); 57002a52c5cSStephen Smalley if (length) { 57102a52c5cSStephen Smalley selinux_policy_cancel(fsi->state, newpolicy); 572e47c8fc5SChristopher J. PeBenito goto out1; 57302a52c5cSStephen Smalley } 57402a52c5cSStephen Smalley 57502a52c5cSStephen Smalley selinux_policy_commit(fsi->state, newpolicy); 576b77a493bSEric Paris 5771da177e4SLinus Torvalds length = count; 578e47c8fc5SChristopher J. PeBenito 579e47c8fc5SChristopher J. PeBenito out1: 580cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 581d141136fSRichard Guy Briggs "auid=%u ses=%u lsm=selinux res=1", 582581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5834746ec5bSEric Paris audit_get_sessionid(current)); 5841da177e4SLinus Torvalds out: 5850619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 5861da177e4SLinus Torvalds vfree(data); 5871da177e4SLinus Torvalds return length; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds 5909c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5911da177e4SLinus Torvalds .write = sel_write_load, 59257a62c23SArnd Bergmann .llseek = generic_file_llseek, 5931da177e4SLinus Torvalds }; 5941da177e4SLinus Torvalds 595ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 5961da177e4SLinus Torvalds { 5970619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5980619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 599b77a493bSEric Paris char *canon = NULL; 600ce9982d0SStephen Smalley u32 sid, len; 6011da177e4SLinus Torvalds ssize_t length; 6021da177e4SLinus Torvalds 6036b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6046b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 605be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); 6061da177e4SLinus Torvalds if (length) 607b77a493bSEric Paris goto out; 6081da177e4SLinus Torvalds 6090619f0f5SStephen Smalley length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); 610b77a493bSEric Paris if (length) 611b77a493bSEric Paris goto out; 6121da177e4SLinus Torvalds 6130619f0f5SStephen Smalley length = security_sid_to_context(state, sid, &canon, &len); 614b77a493bSEric Paris if (length) 615b77a493bSEric Paris goto out; 616ce9982d0SStephen Smalley 617b77a493bSEric Paris length = -ERANGE; 618ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 619f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 620744ba35eSEric Paris "payload max\n", __func__, len); 621ce9982d0SStephen Smalley goto out; 622ce9982d0SStephen Smalley } 623ce9982d0SStephen Smalley 624ce9982d0SStephen Smalley memcpy(buf, canon, len); 625ce9982d0SStephen Smalley length = len; 6261da177e4SLinus Torvalds out: 627ce9982d0SStephen Smalley kfree(canon); 6281da177e4SLinus Torvalds return length; 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6321da177e4SLinus Torvalds size_t count, loff_t *ppos) 6331da177e4SLinus Torvalds { 6340619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 6351da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6361da177e4SLinus Torvalds ssize_t length; 6371da177e4SLinus Torvalds 6380619f0f5SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); 6391da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6431da177e4SLinus Torvalds size_t count, loff_t *ppos) 6441da177e4SLinus Torvalds { 6450619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6468365a719SAl Viro char *page; 6471da177e4SLinus Torvalds ssize_t length; 6481da177e4SLinus Torvalds unsigned int new_value; 6491da177e4SLinus Torvalds 6506b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6516b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 652be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, 653be0554c9SStephen Smalley NULL); 6541da177e4SLinus Torvalds if (length) 6558365a719SAl Viro return length; 6561da177e4SLinus Torvalds 657bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6588365a719SAl Viro return -ENOMEM; 659b77a493bSEric Paris 6601da177e4SLinus Torvalds /* No partial writes. */ 661b77a493bSEric Paris if (*ppos != 0) 6628365a719SAl Viro return -EINVAL; 663b77a493bSEric Paris 6648365a719SAl Viro page = memdup_user_nul(buf, count); 6658365a719SAl Viro if (IS_ERR(page)) 6668365a719SAl Viro return PTR_ERR(page); 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds length = -EINVAL; 6691da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6701da177e4SLinus Torvalds goto out; 6711da177e4SLinus Torvalds 672e9c38f9fSStephen Smalley if (new_value) { 673e9c38f9fSStephen Smalley char comm[sizeof(current->comm)]; 674e9c38f9fSStephen Smalley 675e9c38f9fSStephen Smalley memcpy(comm, current->comm, sizeof(comm)); 676e9c38f9fSStephen Smalley pr_warn_once("SELinux: %s (%d) set checkreqprot to 1. This is deprecated and will be rejected in a future kernel release.\n", 677e9c38f9fSStephen Smalley comm, current->pid); 678e9c38f9fSStephen Smalley } 679e9c38f9fSStephen Smalley 6800619f0f5SStephen Smalley fsi->state->checkreqprot = new_value ? 1 : 0; 6811da177e4SLinus Torvalds length = count; 6821da177e4SLinus Torvalds out: 6838365a719SAl Viro kfree(page); 6841da177e4SLinus Torvalds return length; 6851da177e4SLinus Torvalds } 6869c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6871da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6881da177e4SLinus Torvalds .write = sel_write_checkreqprot, 68957a62c23SArnd Bergmann .llseek = generic_file_llseek, 6901da177e4SLinus Torvalds }; 6911da177e4SLinus Torvalds 692f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 693f9df6458SAndrew Perepechko const char __user *buf, 694f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 695f9df6458SAndrew Perepechko { 6960619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6970619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 698f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 699f9df6458SAndrew Perepechko char *req = NULL; 700f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 701f9df6458SAndrew Perepechko u16 tclass; 702f9df6458SAndrew Perepechko int rc; 703f9df6458SAndrew Perepechko 7046b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 7056b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 706be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); 707f9df6458SAndrew Perepechko if (rc) 708f9df6458SAndrew Perepechko goto out; 709f9df6458SAndrew Perepechko 710f9df6458SAndrew Perepechko rc = -ENOMEM; 711f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 712f9df6458SAndrew Perepechko goto out; 713f9df6458SAndrew Perepechko 714f9df6458SAndrew Perepechko /* No partial writes. */ 715f9df6458SAndrew Perepechko rc = -EINVAL; 716f9df6458SAndrew Perepechko if (*ppos != 0) 717f9df6458SAndrew Perepechko goto out; 718f9df6458SAndrew Perepechko 7190b884d25SAl Viro req = memdup_user_nul(buf, count); 7200b884d25SAl Viro if (IS_ERR(req)) { 7210b884d25SAl Viro rc = PTR_ERR(req); 7220b884d25SAl Viro req = NULL; 723f9df6458SAndrew Perepechko goto out; 7240b884d25SAl Viro } 725f9df6458SAndrew Perepechko 726f9df6458SAndrew Perepechko rc = -ENOMEM; 727f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 728f9df6458SAndrew Perepechko if (!oldcon) 729f9df6458SAndrew Perepechko goto out; 730f9df6458SAndrew Perepechko 731f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 732f9df6458SAndrew Perepechko if (!newcon) 733f9df6458SAndrew Perepechko goto out; 734f9df6458SAndrew Perepechko 735f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 736f9df6458SAndrew Perepechko if (!taskcon) 737f9df6458SAndrew Perepechko goto out; 738f9df6458SAndrew Perepechko 739f9df6458SAndrew Perepechko rc = -EINVAL; 740f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 741f9df6458SAndrew Perepechko goto out; 742f9df6458SAndrew Perepechko 7430619f0f5SStephen Smalley rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); 744f9df6458SAndrew Perepechko if (rc) 745f9df6458SAndrew Perepechko goto out; 746f9df6458SAndrew Perepechko 7470619f0f5SStephen Smalley rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); 748f9df6458SAndrew Perepechko if (rc) 749f9df6458SAndrew Perepechko goto out; 750f9df6458SAndrew Perepechko 7510619f0f5SStephen Smalley rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); 752f9df6458SAndrew Perepechko if (rc) 753f9df6458SAndrew Perepechko goto out; 754f9df6458SAndrew Perepechko 7550619f0f5SStephen Smalley rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); 756f9df6458SAndrew Perepechko if (!rc) 757f9df6458SAndrew Perepechko rc = count; 758f9df6458SAndrew Perepechko out: 759f9df6458SAndrew Perepechko kfree(req); 760f9df6458SAndrew Perepechko kfree(oldcon); 761f9df6458SAndrew Perepechko kfree(newcon); 762f9df6458SAndrew Perepechko kfree(taskcon); 763f9df6458SAndrew Perepechko return rc; 764f9df6458SAndrew Perepechko } 765f9df6458SAndrew Perepechko 766f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 767f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 768f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 769f9df6458SAndrew Perepechko }; 770f9df6458SAndrew Perepechko 7711da177e4SLinus Torvalds /* 7721da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7731da177e4SLinus Torvalds */ 7741da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7751da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7761da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7771da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7781da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7791da177e4SLinus Torvalds 780631d2b49SEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 7811da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7821da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7831da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7841da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7851da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 786ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7871da177e4SLinus Torvalds }; 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7901da177e4SLinus Torvalds { 791496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7921da177e4SLinus Torvalds char *data; 7931da177e4SLinus Torvalds ssize_t rv; 7941da177e4SLinus Torvalds 7956e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7961da177e4SLinus Torvalds return -EINVAL; 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7991da177e4SLinus Torvalds if (IS_ERR(data)) 8001da177e4SLinus Torvalds return PTR_ERR(data); 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 8031da177e4SLinus Torvalds if (rv > 0) { 8041da177e4SLinus Torvalds simple_transaction_set(file, rv); 8051da177e4SLinus Torvalds rv = size; 8061da177e4SLinus Torvalds } 8071da177e4SLinus Torvalds return rv; 8081da177e4SLinus Torvalds } 8091da177e4SLinus Torvalds 8109c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 8111da177e4SLinus Torvalds .write = selinux_transaction_write, 8121da177e4SLinus Torvalds .read = simple_transaction_read, 8131da177e4SLinus Torvalds .release = simple_transaction_release, 81457a62c23SArnd Bergmann .llseek = generic_file_llseek, 8151da177e4SLinus Torvalds }; 8161da177e4SLinus Torvalds 8171da177e4SLinus Torvalds /* 8181da177e4SLinus Torvalds * payload - write methods 8191da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 8201da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 8211da177e4SLinus Torvalds */ 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 8241da177e4SLinus Torvalds { 8250619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8260619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 827b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8281da177e4SLinus Torvalds u32 ssid, tsid; 8291da177e4SLinus Torvalds u16 tclass; 8301da177e4SLinus Torvalds struct av_decision avd; 8311da177e4SLinus Torvalds ssize_t length; 8321da177e4SLinus Torvalds 8336b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8346b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 835be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); 8361da177e4SLinus Torvalds if (length) 837b77a493bSEric Paris goto out; 8381da177e4SLinus Torvalds 8391da177e4SLinus Torvalds length = -ENOMEM; 84089d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8411da177e4SLinus Torvalds if (!scon) 842b77a493bSEric Paris goto out; 8431da177e4SLinus Torvalds 844b77a493bSEric Paris length = -ENOMEM; 84589d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8461da177e4SLinus Torvalds if (!tcon) 8471da177e4SLinus Torvalds goto out; 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds length = -EINVAL; 85019439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 851b77a493bSEric Paris goto out; 8521da177e4SLinus Torvalds 8530619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 854b77a493bSEric Paris if (length) 855b77a493bSEric Paris goto out; 856b77a493bSEric Paris 8570619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 858b77a493bSEric Paris if (length) 859b77a493bSEric Paris goto out; 8601da177e4SLinus Torvalds 8610619f0f5SStephen Smalley security_compute_av_user(state, ssid, tsid, tclass, &avd); 8621da177e4SLinus Torvalds 8631da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8648a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 865f1c6381aSEric Paris avd.allowed, 0xffffffff, 8661da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8678a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8681da177e4SLinus Torvalds out: 869b77a493bSEric Paris kfree(tcon); 8701da177e4SLinus Torvalds kfree(scon); 8711da177e4SLinus Torvalds return length; 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8751da177e4SLinus Torvalds { 8760619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8770619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 878b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 879f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8801da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8811da177e4SLinus Torvalds u16 tclass; 8821da177e4SLinus Torvalds ssize_t length; 883b77a493bSEric Paris char *newcon = NULL; 8841da177e4SLinus Torvalds u32 len; 885f50a3ec9SKohei Kaigai int nargs; 8861da177e4SLinus Torvalds 8876b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8886b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 889be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, 890be0554c9SStephen Smalley NULL); 8911da177e4SLinus Torvalds if (length) 892b77a493bSEric Paris goto out; 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds length = -ENOMEM; 89589d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8961da177e4SLinus Torvalds if (!scon) 897b77a493bSEric Paris goto out; 8981da177e4SLinus Torvalds 899b77a493bSEric Paris length = -ENOMEM; 90089d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9011da177e4SLinus Torvalds if (!tcon) 9021da177e4SLinus Torvalds goto out; 9031da177e4SLinus Torvalds 904f50a3ec9SKohei Kaigai length = -ENOMEM; 905f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 906f50a3ec9SKohei Kaigai if (!namebuf) 907b77a493bSEric Paris goto out; 9081da177e4SLinus Torvalds 909f50a3ec9SKohei Kaigai length = -EINVAL; 910f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 911f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 912f50a3ec9SKohei Kaigai goto out; 9130f7e4c33SKohei Kaigai if (nargs == 4) { 9140f7e4c33SKohei Kaigai /* 9150f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 9160f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 9170f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 9180f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 9190f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 9200f7e4c33SKohei Kaigai */ 9210f7e4c33SKohei Kaigai char *r, *w; 9220f7e4c33SKohei Kaigai int c1, c2; 9230f7e4c33SKohei Kaigai 9240f7e4c33SKohei Kaigai r = w = namebuf; 9250f7e4c33SKohei Kaigai do { 9260f7e4c33SKohei Kaigai c1 = *r++; 9270f7e4c33SKohei Kaigai if (c1 == '+') 9280f7e4c33SKohei Kaigai c1 = ' '; 9290f7e4c33SKohei Kaigai else if (c1 == '%') { 930af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 931af7ff2c2SAndy Shevchenko if (c1 < 0) 9320f7e4c33SKohei Kaigai goto out; 933af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 934af7ff2c2SAndy Shevchenko if (c2 < 0) 9350f7e4c33SKohei Kaigai goto out; 9360f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 9370f7e4c33SKohei Kaigai } 9380f7e4c33SKohei Kaigai *w++ = c1; 9390f7e4c33SKohei Kaigai } while (c1 != '\0'); 9400f7e4c33SKohei Kaigai 941f50a3ec9SKohei Kaigai objname = namebuf; 9420f7e4c33SKohei Kaigai } 943f50a3ec9SKohei Kaigai 9440619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 945b77a493bSEric Paris if (length) 946b77a493bSEric Paris goto out; 947b77a493bSEric Paris 9480619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 949b77a493bSEric Paris if (length) 950b77a493bSEric Paris goto out; 9511da177e4SLinus Torvalds 9520619f0f5SStephen Smalley length = security_transition_sid_user(state, ssid, tsid, tclass, 9530619f0f5SStephen Smalley objname, &newsid); 954b77a493bSEric Paris if (length) 955b77a493bSEric Paris goto out; 9561da177e4SLinus Torvalds 9570619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 958b77a493bSEric Paris if (length) 959b77a493bSEric Paris goto out; 9601da177e4SLinus Torvalds 961b77a493bSEric Paris length = -ERANGE; 9621da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 963f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 964744ba35eSEric Paris "payload max\n", __func__, len); 965b77a493bSEric Paris goto out; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds memcpy(buf, newcon, len); 9691da177e4SLinus Torvalds length = len; 9701da177e4SLinus Torvalds out: 971b77a493bSEric Paris kfree(newcon); 972f50a3ec9SKohei Kaigai kfree(namebuf); 973b77a493bSEric Paris kfree(tcon); 9741da177e4SLinus Torvalds kfree(scon); 9751da177e4SLinus Torvalds return length; 9761da177e4SLinus Torvalds } 9771da177e4SLinus Torvalds 9781da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9791da177e4SLinus Torvalds { 9800619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 9810619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 982b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9831da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9841da177e4SLinus Torvalds u16 tclass; 9851da177e4SLinus Torvalds ssize_t length; 986b77a493bSEric Paris char *newcon = NULL; 9871da177e4SLinus Torvalds u32 len; 9881da177e4SLinus Torvalds 9896b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 9906b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 991be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, 992be0554c9SStephen Smalley NULL); 9931da177e4SLinus Torvalds if (length) 994b77a493bSEric Paris goto out; 9951da177e4SLinus Torvalds 9961da177e4SLinus Torvalds length = -ENOMEM; 99789d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9981da177e4SLinus Torvalds if (!scon) 999b77a493bSEric Paris goto out; 10001da177e4SLinus Torvalds 1001b77a493bSEric Paris length = -ENOMEM; 100289d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 10031da177e4SLinus Torvalds if (!tcon) 10041da177e4SLinus Torvalds goto out; 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds length = -EINVAL; 10071da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1008b77a493bSEric Paris goto out; 10091da177e4SLinus Torvalds 10100619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1011b77a493bSEric Paris if (length) 1012b77a493bSEric Paris goto out; 1013b77a493bSEric Paris 10140619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1015b77a493bSEric Paris if (length) 1016b77a493bSEric Paris goto out; 10171da177e4SLinus Torvalds 10180619f0f5SStephen Smalley length = security_change_sid(state, ssid, tsid, tclass, &newsid); 1019b77a493bSEric Paris if (length) 1020b77a493bSEric Paris goto out; 10211da177e4SLinus Torvalds 10220619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1023b77a493bSEric Paris if (length) 1024b77a493bSEric Paris goto out; 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds length = -ERANGE; 1027b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 1028b77a493bSEric Paris goto out; 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds memcpy(buf, newcon, len); 10311da177e4SLinus Torvalds length = len; 10321da177e4SLinus Torvalds out: 1033b77a493bSEric Paris kfree(newcon); 1034b77a493bSEric Paris kfree(tcon); 10351da177e4SLinus Torvalds kfree(scon); 10361da177e4SLinus Torvalds return length; 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 10401da177e4SLinus Torvalds { 10410619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10420619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1043b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 1044b77a493bSEric Paris u32 sid, *sids = NULL; 10451da177e4SLinus Torvalds ssize_t length; 10461da177e4SLinus Torvalds char *newcon; 10471da177e4SLinus Torvalds int i, rc; 10481da177e4SLinus Torvalds u32 len, nsids; 10491da177e4SLinus Torvalds 10506b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 10516b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1052be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_USER, 1053be0554c9SStephen Smalley NULL); 10541da177e4SLinus Torvalds if (length) 10556eab04a8SJustin P. Mattock goto out; 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds length = -ENOMEM; 105889d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 10591da177e4SLinus Torvalds if (!con) 10606eab04a8SJustin P. Mattock goto out; 10611da177e4SLinus Torvalds 1062b77a493bSEric Paris length = -ENOMEM; 106389d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 10641da177e4SLinus Torvalds if (!user) 10651da177e4SLinus Torvalds goto out; 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds length = -EINVAL; 10681da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 1069b77a493bSEric Paris goto out; 10701da177e4SLinus Torvalds 10710619f0f5SStephen Smalley length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); 1072b77a493bSEric Paris if (length) 1073b77a493bSEric Paris goto out; 10741da177e4SLinus Torvalds 10750619f0f5SStephen Smalley length = security_get_user_sids(state, sid, user, &sids, &nsids); 1076b77a493bSEric Paris if (length) 1077b77a493bSEric Paris goto out; 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10801da177e4SLinus Torvalds ptr = buf + length; 10811da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10820619f0f5SStephen Smalley rc = security_sid_to_context(state, sids[i], &newcon, &len); 10831da177e4SLinus Torvalds if (rc) { 10841da177e4SLinus Torvalds length = rc; 1085b77a493bSEric Paris goto out; 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10881da177e4SLinus Torvalds kfree(newcon); 10891da177e4SLinus Torvalds length = -ERANGE; 1090b77a493bSEric Paris goto out; 10911da177e4SLinus Torvalds } 10921da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10931da177e4SLinus Torvalds kfree(newcon); 10941da177e4SLinus Torvalds ptr += len; 10951da177e4SLinus Torvalds length += len; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds out: 1098b77a493bSEric Paris kfree(sids); 1099b77a493bSEric Paris kfree(user); 11001da177e4SLinus Torvalds kfree(con); 11011da177e4SLinus Torvalds return length; 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds 11041da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 11051da177e4SLinus Torvalds { 11060619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 11070619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1108b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 11091da177e4SLinus Torvalds u32 ssid, tsid, newsid; 11101da177e4SLinus Torvalds u16 tclass; 11111da177e4SLinus Torvalds ssize_t length; 1112b77a493bSEric Paris char *newcon = NULL; 11131da177e4SLinus Torvalds u32 len; 11141da177e4SLinus Torvalds 11156b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 11166b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1117be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, 1118be0554c9SStephen Smalley NULL); 11191da177e4SLinus Torvalds if (length) 1120b77a493bSEric Paris goto out; 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds length = -ENOMEM; 112389d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 11241da177e4SLinus Torvalds if (!scon) 11256eab04a8SJustin P. Mattock goto out; 11261da177e4SLinus Torvalds 1127b77a493bSEric Paris length = -ENOMEM; 112889d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 11291da177e4SLinus Torvalds if (!tcon) 11301da177e4SLinus Torvalds goto out; 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds length = -EINVAL; 11331da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1134b77a493bSEric Paris goto out; 11351da177e4SLinus Torvalds 11360619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1137b77a493bSEric Paris if (length) 1138b77a493bSEric Paris goto out; 1139b77a493bSEric Paris 11400619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1141b77a493bSEric Paris if (length) 1142b77a493bSEric Paris goto out; 11431da177e4SLinus Torvalds 11440619f0f5SStephen Smalley length = security_member_sid(state, ssid, tsid, tclass, &newsid); 1145b77a493bSEric Paris if (length) 1146b77a493bSEric Paris goto out; 11471da177e4SLinus Torvalds 11480619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1149b77a493bSEric Paris if (length) 1150b77a493bSEric Paris goto out; 11511da177e4SLinus Torvalds 1152b77a493bSEric Paris length = -ERANGE; 11531da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1154f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 1155744ba35eSEric Paris "payload max\n", __func__, len); 1156b77a493bSEric Paris goto out; 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 11591da177e4SLinus Torvalds memcpy(buf, newcon, len); 11601da177e4SLinus Torvalds length = len; 11611da177e4SLinus Torvalds out: 1162b77a493bSEric Paris kfree(newcon); 1163b77a493bSEric Paris kfree(tcon); 11641da177e4SLinus Torvalds kfree(scon); 11651da177e4SLinus Torvalds return length; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds 11681da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 11691da177e4SLinus Torvalds { 11701da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds if (ret) { 11731da177e4SLinus Torvalds ret->i_mode = mode; 1174078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 11751da177e4SLinus Torvalds } 11761da177e4SLinus Torvalds return ret; 11771da177e4SLinus Torvalds } 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 11801da177e4SLinus Torvalds size_t count, loff_t *ppos) 11811da177e4SLinus Torvalds { 11820619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 11831da177e4SLinus Torvalds char *page = NULL; 11841da177e4SLinus Torvalds ssize_t length; 11851da177e4SLinus Torvalds ssize_t ret; 11861da177e4SLinus Torvalds int cur_enforcing; 1187496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1188d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11891da177e4SLinus Torvalds 11900619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 11911da177e4SLinus Torvalds 1192d313f948SStephen Smalley ret = -EINVAL; 11930619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 11940619f0f5SStephen Smalley fsi->bool_pending_names[index])) 11950da74120SJann Horn goto out_unlock; 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds ret = -ENOMEM; 1198b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1199b77a493bSEric Paris if (!page) 12000da74120SJann Horn goto out_unlock; 12011da177e4SLinus Torvalds 12020619f0f5SStephen Smalley cur_enforcing = security_get_bool_value(fsi->state, index); 12031da177e4SLinus Torvalds if (cur_enforcing < 0) { 12041da177e4SLinus Torvalds ret = cur_enforcing; 12050da74120SJann Horn goto out_unlock; 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 12080619f0f5SStephen Smalley fsi->bool_pending_values[index]); 12090619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12100da74120SJann Horn ret = simple_read_from_buffer(buf, count, ppos, page, length); 12110da74120SJann Horn out_free: 12121da177e4SLinus Torvalds free_page((unsigned long)page); 12131da177e4SLinus Torvalds return ret; 12140da74120SJann Horn 12150da74120SJann Horn out_unlock: 12160da74120SJann Horn mutex_unlock(&fsi->mutex); 12170da74120SJann Horn goto out_free; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 12211da177e4SLinus Torvalds size_t count, loff_t *ppos) 12221da177e4SLinus Torvalds { 12230619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12241da177e4SLinus Torvalds char *page = NULL; 1225d313f948SStephen Smalley ssize_t length; 12261da177e4SLinus Torvalds int new_value; 1227496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1228d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 12291da177e4SLinus Torvalds 12300da74120SJann Horn if (count >= PAGE_SIZE) 12310da74120SJann Horn return -ENOMEM; 12320da74120SJann Horn 12330da74120SJann Horn /* No partial writes. */ 12340da74120SJann Horn if (*ppos != 0) 12350da74120SJann Horn return -EINVAL; 12360da74120SJann Horn 12370da74120SJann Horn page = memdup_user_nul(buf, count); 12380da74120SJann Horn if (IS_ERR(page)) 12390da74120SJann Horn return PTR_ERR(page); 12400da74120SJann Horn 12410619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12421da177e4SLinus Torvalds 12436b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12446b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1245be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1246be0554c9SStephen Smalley NULL); 12471da177e4SLinus Torvalds if (length) 12481da177e4SLinus Torvalds goto out; 12491da177e4SLinus Torvalds 1250d313f948SStephen Smalley length = -EINVAL; 12510619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 12520619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1253d313f948SStephen Smalley goto out; 1254d313f948SStephen Smalley 12551da177e4SLinus Torvalds length = -EINVAL; 12561da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12571da177e4SLinus Torvalds goto out; 12581da177e4SLinus Torvalds 12591da177e4SLinus Torvalds if (new_value) 12601da177e4SLinus Torvalds new_value = 1; 12611da177e4SLinus Torvalds 12620619f0f5SStephen Smalley fsi->bool_pending_values[index] = new_value; 12631da177e4SLinus Torvalds length = count; 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds out: 12660619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12678365a719SAl Viro kfree(page); 12681da177e4SLinus Torvalds return length; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 12719c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 12721da177e4SLinus Torvalds .read = sel_read_bool, 12731da177e4SLinus Torvalds .write = sel_write_bool, 127457a62c23SArnd Bergmann .llseek = generic_file_llseek, 12751da177e4SLinus Torvalds }; 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 12781da177e4SLinus Torvalds const char __user *buf, 12791da177e4SLinus Torvalds size_t count, loff_t *ppos) 12801da177e4SLinus Torvalds { 12810619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12821da177e4SLinus Torvalds char *page = NULL; 1283d313f948SStephen Smalley ssize_t length; 12841da177e4SLinus Torvalds int new_value; 12851da177e4SLinus Torvalds 12860da74120SJann Horn if (count >= PAGE_SIZE) 12870da74120SJann Horn return -ENOMEM; 12880da74120SJann Horn 12890da74120SJann Horn /* No partial writes. */ 12900da74120SJann Horn if (*ppos != 0) 12910da74120SJann Horn return -EINVAL; 12920da74120SJann Horn 12930da74120SJann Horn page = memdup_user_nul(buf, count); 12940da74120SJann Horn if (IS_ERR(page)) 12950da74120SJann Horn return PTR_ERR(page); 12960da74120SJann Horn 12970619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12981da177e4SLinus Torvalds 12996b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 13006b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1301be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1302be0554c9SStephen Smalley NULL); 13031da177e4SLinus Torvalds if (length) 13041da177e4SLinus Torvalds goto out; 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds length = -EINVAL; 13071da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 13081da177e4SLinus Torvalds goto out; 13091da177e4SLinus Torvalds 1310b77a493bSEric Paris length = 0; 13110619f0f5SStephen Smalley if (new_value && fsi->bool_pending_values) 13120619f0f5SStephen Smalley length = security_set_bools(fsi->state, fsi->bool_num, 13130619f0f5SStephen Smalley fsi->bool_pending_values); 13141da177e4SLinus Torvalds 1315b77a493bSEric Paris if (!length) 13161da177e4SLinus Torvalds length = count; 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds out: 13190619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 13208365a719SAl Viro kfree(page); 13211da177e4SLinus Torvalds return length; 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds 13249c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 13251da177e4SLinus Torvalds .write = sel_commit_bools_write, 132657a62c23SArnd Bergmann .llseek = generic_file_llseek, 13271da177e4SLinus Torvalds }; 13281da177e4SLinus Torvalds 13290c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 13301da177e4SLinus Torvalds { 1331ad52184bSAl Viro d_genocide(de); 1332ad52184bSAl Viro shrink_dcache_parent(de); 13331da177e4SLinus Torvalds } 13341da177e4SLinus Torvalds 13351da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 13361da177e4SLinus Torvalds 133702a52c5cSStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi, 133802a52c5cSStephen Smalley struct selinux_policy *newpolicy) 13391da177e4SLinus Torvalds { 134060abd318SOndrej Mosnacek int ret; 13411da177e4SLinus Torvalds ssize_t len; 13421da177e4SLinus Torvalds struct dentry *dentry = NULL; 13430619f0f5SStephen Smalley struct dentry *dir = fsi->bool_dir; 13441da177e4SLinus Torvalds struct inode *inode = NULL; 13451da177e4SLinus Torvalds struct inode_security_struct *isec; 13461da177e4SLinus Torvalds char **names = NULL, *page; 134760abd318SOndrej Mosnacek u32 i, num; 13481da177e4SLinus Torvalds int *values = NULL; 13491da177e4SLinus Torvalds u32 sid; 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds /* remove any existing files */ 13520619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 13530619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 13540619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 13550619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 13560619f0f5SStephen Smalley fsi->bool_num = 0; 13570619f0f5SStephen Smalley fsi->bool_pending_names = NULL; 13580619f0f5SStephen Smalley fsi->bool_pending_values = NULL; 13591da177e4SLinus Torvalds 13600c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 13611da177e4SLinus Torvalds 1362b77a493bSEric Paris ret = -ENOMEM; 13631872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 13641872981bSEric Paris if (!page) 1365b77a493bSEric Paris goto out; 13661da177e4SLinus Torvalds 136702a52c5cSStephen Smalley ret = security_get_bools(newpolicy, &num, &names, &values); 1368b77a493bSEric Paris if (ret) 13691da177e4SLinus Torvalds goto out; 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1372b77a493bSEric Paris ret = -ENOMEM; 13731da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1374b77a493bSEric Paris if (!dentry) 1375b77a493bSEric Paris goto out; 13761da177e4SLinus Torvalds 1377b77a493bSEric Paris ret = -ENOMEM; 1378b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 13797e4237faSnixiaoming if (!inode) { 13807e4237faSnixiaoming dput(dentry); 1381b77a493bSEric Paris goto out; 13827e4237faSnixiaoming } 1383b77a493bSEric Paris 13841da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1385cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 13867e4237faSnixiaoming if (len >= PAGE_SIZE) { 13877e4237faSnixiaoming dput(dentry); 13887e4237faSnixiaoming iput(inode); 1389b77a493bSEric Paris goto out; 13907e4237faSnixiaoming } 1391b77a493bSEric Paris 139280788c22SCasey Schaufler isec = selinux_inode(inode); 139302a52c5cSStephen Smalley ret = selinux_policy_genfs_sid(newpolicy, "selinuxfs", page, 1394aa8e712cSStephen Smalley SECCLASS_FILE, &sid); 13954262fb51SGary Tierney if (ret) { 1396900fde06SGary Tierney pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", 1397900fde06SGary Tierney page); 1398900fde06SGary Tierney sid = SECINITSID_SECURITY; 13994262fb51SGary Tierney } 14004262fb51SGary Tierney 14011da177e4SLinus Torvalds isec->sid = sid; 140242059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 14031da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1404bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 14051da177e4SLinus Torvalds d_add(dentry, inode); 14061da177e4SLinus Torvalds } 14070619f0f5SStephen Smalley fsi->bool_num = num; 14080619f0f5SStephen Smalley fsi->bool_pending_names = names; 14090619f0f5SStephen Smalley fsi->bool_pending_values = values; 1410b77a493bSEric Paris 1411b77a493bSEric Paris free_page((unsigned long)page); 1412b77a493bSEric Paris return 0; 14131da177e4SLinus Torvalds out: 14141da177e4SLinus Torvalds free_page((unsigned long)page); 1415b77a493bSEric Paris 14161da177e4SLinus Torvalds if (names) { 14179a5f04bfSJesper Juhl for (i = 0; i < num; i++) 14181da177e4SLinus Torvalds kfree(names[i]); 14191da177e4SLinus Torvalds kfree(names); 14201da177e4SLinus Torvalds } 142120c19e41SDavi Arnaut kfree(values); 14220c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1423b77a493bSEric Paris 1424b77a493bSEric Paris return ret; 14251da177e4SLinus Torvalds } 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 14281da177e4SLinus Torvalds size_t count, loff_t *ppos) 14291da177e4SLinus Torvalds { 14306b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14316b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14321da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 14331da177e4SLinus Torvalds ssize_t length; 14341da177e4SLinus Torvalds 14356b6bc620SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 14366b6bc620SStephen Smalley avc_get_cache_threshold(state->avc)); 14371da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 14381da177e4SLinus Torvalds } 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 14411da177e4SLinus Torvalds const char __user *buf, 14421da177e4SLinus Torvalds size_t count, loff_t *ppos) 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds { 14456b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 14466b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14478365a719SAl Viro char *page; 14481da177e4SLinus Torvalds ssize_t ret; 1449309c5fadSHeinrich Schuchardt unsigned int new_value; 14501da177e4SLinus Torvalds 14516b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 14526b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1453be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETSECPARAM, 1454be0554c9SStephen Smalley NULL); 14551da177e4SLinus Torvalds if (ret) 14568365a719SAl Viro return ret; 1457b77a493bSEric Paris 1458b77a493bSEric Paris if (count >= PAGE_SIZE) 14598365a719SAl Viro return -ENOMEM; 1460b77a493bSEric Paris 1461b77a493bSEric Paris /* No partial writes. */ 1462b77a493bSEric Paris if (*ppos != 0) 14638365a719SAl Viro return -EINVAL; 1464b77a493bSEric Paris 14658365a719SAl Viro page = memdup_user_nul(buf, count); 14668365a719SAl Viro if (IS_ERR(page)) 14678365a719SAl Viro return PTR_ERR(page); 1468b77a493bSEric Paris 1469b77a493bSEric Paris ret = -EINVAL; 1470b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1471b77a493bSEric Paris goto out; 1472b77a493bSEric Paris 14736b6bc620SStephen Smalley avc_set_cache_threshold(state->avc, new_value); 1474b77a493bSEric Paris 14751da177e4SLinus Torvalds ret = count; 14761da177e4SLinus Torvalds out: 14778365a719SAl Viro kfree(page); 14781da177e4SLinus Torvalds return ret; 14791da177e4SLinus Torvalds } 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 14821da177e4SLinus Torvalds size_t count, loff_t *ppos) 14831da177e4SLinus Torvalds { 14846b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14856b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14861da177e4SLinus Torvalds char *page; 1487b77a493bSEric Paris ssize_t length; 14881da177e4SLinus Torvalds 14891da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1490b77a493bSEric Paris if (!page) 1491b77a493bSEric Paris return -ENOMEM; 1492b77a493bSEric Paris 14936b6bc620SStephen Smalley length = avc_get_hash_stats(state->avc, page); 1494b77a493bSEric Paris if (length >= 0) 1495b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 14961da177e4SLinus Torvalds free_page((unsigned long)page); 1497b77a493bSEric Paris 1498b77a493bSEric Paris return length; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds 150166f8e2f0SJeff Vander Stoep static ssize_t sel_read_sidtab_hash_stats(struct file *filp, char __user *buf, 150266f8e2f0SJeff Vander Stoep size_t count, loff_t *ppos) 150366f8e2f0SJeff Vander Stoep { 150466f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 150566f8e2f0SJeff Vander Stoep struct selinux_state *state = fsi->state; 150666f8e2f0SJeff Vander Stoep char *page; 150766f8e2f0SJeff Vander Stoep ssize_t length; 150866f8e2f0SJeff Vander Stoep 150966f8e2f0SJeff Vander Stoep page = (char *)__get_free_page(GFP_KERNEL); 151066f8e2f0SJeff Vander Stoep if (!page) 151166f8e2f0SJeff Vander Stoep return -ENOMEM; 151266f8e2f0SJeff Vander Stoep 151366f8e2f0SJeff Vander Stoep length = security_sidtab_hash_stats(state, page); 151466f8e2f0SJeff Vander Stoep if (length >= 0) 151566f8e2f0SJeff Vander Stoep length = simple_read_from_buffer(buf, count, ppos, page, 151666f8e2f0SJeff Vander Stoep length); 151766f8e2f0SJeff Vander Stoep free_page((unsigned long)page); 151866f8e2f0SJeff Vander Stoep 151966f8e2f0SJeff Vander Stoep return length; 152066f8e2f0SJeff Vander Stoep } 152166f8e2f0SJeff Vander Stoep 152266f8e2f0SJeff Vander Stoep static const struct file_operations sel_sidtab_hash_stats_ops = { 152366f8e2f0SJeff Vander Stoep .read = sel_read_sidtab_hash_stats, 152466f8e2f0SJeff Vander Stoep .llseek = generic_file_llseek, 152566f8e2f0SJeff Vander Stoep }; 152666f8e2f0SJeff Vander Stoep 15279c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 15281da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 15291da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 153057a62c23SArnd Bergmann .llseek = generic_file_llseek, 15311da177e4SLinus Torvalds }; 15321da177e4SLinus Torvalds 15339c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 15341da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 153557a62c23SArnd Bergmann .llseek = generic_file_llseek, 15361da177e4SLinus Torvalds }; 15371da177e4SLinus Torvalds 15381da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15391da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 15401da177e4SLinus Torvalds { 15411da177e4SLinus Torvalds int cpu; 15421da177e4SLinus Torvalds 15434f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 15441da177e4SLinus Torvalds if (!cpu_possible(cpu)) 15451da177e4SLinus Torvalds continue; 15461da177e4SLinus Torvalds *idx = cpu + 1; 15471da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 15481da177e4SLinus Torvalds } 15498d269a8eSVasily Averin (*idx)++; 15501da177e4SLinus Torvalds return NULL; 15511da177e4SLinus Torvalds } 15521da177e4SLinus Torvalds 15531da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 15541da177e4SLinus Torvalds { 15551da177e4SLinus Torvalds loff_t n = *pos - 1; 15561da177e4SLinus Torvalds 15571da177e4SLinus Torvalds if (*pos == 0) 15581da177e4SLinus Torvalds return SEQ_START_TOKEN; 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 15611da177e4SLinus Torvalds } 15621da177e4SLinus Torvalds 15631da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 15641da177e4SLinus Torvalds { 15651da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds 15681da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 15691da177e4SLinus Torvalds { 15701da177e4SLinus Torvalds struct avc_cache_stats *st = v; 15711da177e4SLinus Torvalds 1572710a0647SMarkus Elfring if (v == SEQ_START_TOKEN) { 1573710a0647SMarkus Elfring seq_puts(seq, 1574710a0647SMarkus Elfring "lookups hits misses allocations reclaims frees\n"); 1575710a0647SMarkus Elfring } else { 1576257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1577257313b2SLinus Torvalds unsigned int misses = st->misses; 1578257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1579257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1580257313b2SLinus Torvalds hits, misses, st->allocations, 15811da177e4SLinus Torvalds st->reclaims, st->frees); 1582257313b2SLinus Torvalds } 15831da177e4SLinus Torvalds return 0; 15841da177e4SLinus Torvalds } 15851da177e4SLinus Torvalds 15861da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 15871da177e4SLinus Torvalds { } 15881da177e4SLinus Torvalds 15891996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 15901da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 15911da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 15921da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 15931da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 15941da177e4SLinus Torvalds }; 15951da177e4SLinus Torvalds 15961da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 15971da177e4SLinus Torvalds { 15981da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 15991da177e4SLinus Torvalds } 16001da177e4SLinus Torvalds 16019c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 16021da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 16031da177e4SLinus Torvalds .read = seq_read, 16041da177e4SLinus Torvalds .llseek = seq_lseek, 16051da177e4SLinus Torvalds .release = seq_release, 16061da177e4SLinus Torvalds }; 16071da177e4SLinus Torvalds #endif 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 16101da177e4SLinus Torvalds { 16110619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 16120619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1613b77a493bSEric Paris int i; 1614cda37124SEric Biggers static const struct tree_descr files[] = { 16151da177e4SLinus Torvalds { "cache_threshold", 16161da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 16171da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 16181da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 16191da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 16201da177e4SLinus Torvalds #endif 16211da177e4SLinus Torvalds }; 16221da177e4SLinus Torvalds 16236e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 16241da177e4SLinus Torvalds struct inode *inode; 16251da177e4SLinus Torvalds struct dentry *dentry; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1628b77a493bSEric Paris if (!dentry) 1629b77a493bSEric Paris return -ENOMEM; 16301da177e4SLinus Torvalds 16311da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 16327e4237faSnixiaoming if (!inode) { 16337e4237faSnixiaoming dput(dentry); 1634b77a493bSEric Paris return -ENOMEM; 16357e4237faSnixiaoming } 1636b77a493bSEric Paris 16371da177e4SLinus Torvalds inode->i_fop = files[i].ops; 16380619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 16391da177e4SLinus Torvalds d_add(dentry, inode); 16401da177e4SLinus Torvalds } 1641b77a493bSEric Paris 1642b77a493bSEric Paris return 0; 16431da177e4SLinus Torvalds } 16441da177e4SLinus Torvalds 164566f8e2f0SJeff Vander Stoep static int sel_make_ss_files(struct dentry *dir) 164666f8e2f0SJeff Vander Stoep { 164766f8e2f0SJeff Vander Stoep struct super_block *sb = dir->d_sb; 164866f8e2f0SJeff Vander Stoep struct selinux_fs_info *fsi = sb->s_fs_info; 164966f8e2f0SJeff Vander Stoep int i; 165066f8e2f0SJeff Vander Stoep static struct tree_descr files[] = { 165166f8e2f0SJeff Vander Stoep { "sidtab_hash_stats", &sel_sidtab_hash_stats_ops, S_IRUGO }, 165266f8e2f0SJeff Vander Stoep }; 165366f8e2f0SJeff Vander Stoep 165466f8e2f0SJeff Vander Stoep for (i = 0; i < ARRAY_SIZE(files); i++) { 165566f8e2f0SJeff Vander Stoep struct inode *inode; 165666f8e2f0SJeff Vander Stoep struct dentry *dentry; 165766f8e2f0SJeff Vander Stoep 165866f8e2f0SJeff Vander Stoep dentry = d_alloc_name(dir, files[i].name); 165966f8e2f0SJeff Vander Stoep if (!dentry) 166066f8e2f0SJeff Vander Stoep return -ENOMEM; 166166f8e2f0SJeff Vander Stoep 166266f8e2f0SJeff Vander Stoep inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 166366f8e2f0SJeff Vander Stoep if (!inode) { 166466f8e2f0SJeff Vander Stoep dput(dentry); 166566f8e2f0SJeff Vander Stoep return -ENOMEM; 166666f8e2f0SJeff Vander Stoep } 166766f8e2f0SJeff Vander Stoep 166866f8e2f0SJeff Vander Stoep inode->i_fop = files[i].ops; 166966f8e2f0SJeff Vander Stoep inode->i_ino = ++fsi->last_ino; 167066f8e2f0SJeff Vander Stoep d_add(dentry, inode); 167166f8e2f0SJeff Vander Stoep } 167266f8e2f0SJeff Vander Stoep 167366f8e2f0SJeff Vander Stoep return 0; 167466f8e2f0SJeff Vander Stoep } 167566f8e2f0SJeff Vander Stoep 1676f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1677f0ee2e46SJames Carter size_t count, loff_t *ppos) 1678f0ee2e46SJames Carter { 16790619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1680f0ee2e46SJames Carter char *con; 1681f0ee2e46SJames Carter u32 sid, len; 1682f0ee2e46SJames Carter ssize_t ret; 1683f0ee2e46SJames Carter 1684496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 16850619f0f5SStephen Smalley ret = security_sid_to_context(fsi->state, sid, &con, &len); 1686b77a493bSEric Paris if (ret) 1687f0ee2e46SJames Carter return ret; 1688f0ee2e46SJames Carter 1689f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1690f0ee2e46SJames Carter kfree(con); 1691f0ee2e46SJames Carter return ret; 1692f0ee2e46SJames Carter } 1693f0ee2e46SJames Carter 1694f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1695f0ee2e46SJames Carter .read = sel_read_initcon, 169657a62c23SArnd Bergmann .llseek = generic_file_llseek, 1697f0ee2e46SJames Carter }; 1698f0ee2e46SJames Carter 1699f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1700f0ee2e46SJames Carter { 1701b77a493bSEric Paris int i; 1702f0ee2e46SJames Carter 1703f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1704f0ee2e46SJames Carter struct inode *inode; 1705f0ee2e46SJames Carter struct dentry *dentry; 1706e3e0b582SStephen Smalley const char *s = security_get_initial_sid_context(i); 1707e3e0b582SStephen Smalley 1708e3e0b582SStephen Smalley if (!s) 1709e3e0b582SStephen Smalley continue; 1710e3e0b582SStephen Smalley dentry = d_alloc_name(dir, s); 1711b77a493bSEric Paris if (!dentry) 1712b77a493bSEric Paris return -ENOMEM; 1713f0ee2e46SJames Carter 1714f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 17157e4237faSnixiaoming if (!inode) { 17167e4237faSnixiaoming dput(dentry); 1717b77a493bSEric Paris return -ENOMEM; 17187e4237faSnixiaoming } 1719b77a493bSEric Paris 1720f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1721f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1722f0ee2e46SJames Carter d_add(dentry, inode); 1723f0ee2e46SJames Carter } 1724b77a493bSEric Paris 1725b77a493bSEric Paris return 0; 1726f0ee2e46SJames Carter } 1727f0ee2e46SJames Carter 1728e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1729e47c8fc5SChristopher J. PeBenito { 1730e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1731e47c8fc5SChristopher J. PeBenito } 1732e47c8fc5SChristopher J. PeBenito 1733e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1734e47c8fc5SChristopher J. PeBenito { 173592ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1736e47c8fc5SChristopher J. PeBenito } 1737e47c8fc5SChristopher J. PeBenito 1738e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1739e47c8fc5SChristopher J. PeBenito { 1740e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1741e47c8fc5SChristopher J. PeBenito } 1742e47c8fc5SChristopher J. PeBenito 1743e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1744e47c8fc5SChristopher J. PeBenito { 1745e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1746e47c8fc5SChristopher J. PeBenito } 1747e47c8fc5SChristopher J. PeBenito 1748e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1749e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1750e47c8fc5SChristopher J. PeBenito { 1751496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1752cc1dad71SAl Viro char res[TMPBUFLEN]; 17537e78c875Sliuyang34 ssize_t len = scnprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1754cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1755e47c8fc5SChristopher J. PeBenito } 1756e47c8fc5SChristopher J. PeBenito 1757e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1758e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 175957a62c23SArnd Bergmann .llseek = generic_file_llseek, 1760e47c8fc5SChristopher J. PeBenito }; 1761e47c8fc5SChristopher J. PeBenito 1762e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1763e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1764e47c8fc5SChristopher J. PeBenito { 1765496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1766cc1dad71SAl Viro char res[TMPBUFLEN]; 17677e78c875Sliuyang34 ssize_t len = scnprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1768cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1769e47c8fc5SChristopher J. PeBenito } 1770e47c8fc5SChristopher J. PeBenito 1771e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1772e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 177357a62c23SArnd Bergmann .llseek = generic_file_llseek, 1774e47c8fc5SChristopher J. PeBenito }; 1775e47c8fc5SChristopher J. PeBenito 17763bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 17773bb56b25SPaul Moore size_t count, loff_t *ppos) 17783bb56b25SPaul Moore { 17790619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 17803bb56b25SPaul Moore int value; 17813bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 17823bb56b25SPaul Moore ssize_t length; 1783496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 17843bb56b25SPaul Moore 17850619f0f5SStephen Smalley value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); 17863bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 17873bb56b25SPaul Moore 17883bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 17893bb56b25SPaul Moore } 17903bb56b25SPaul Moore 17913bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 17923bb56b25SPaul Moore .read = sel_read_policycap, 179357a62c23SArnd Bergmann .llseek = generic_file_llseek, 17943bb56b25SPaul Moore }; 17953bb56b25SPaul Moore 179602a52c5cSStephen Smalley static int sel_make_perm_files(struct selinux_policy *newpolicy, 179702a52c5cSStephen Smalley char *objclass, int classvalue, 1798e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1799e47c8fc5SChristopher J. PeBenito { 1800b77a493bSEric Paris int i, rc, nperms; 1801e47c8fc5SChristopher J. PeBenito char **perms; 1802e47c8fc5SChristopher J. PeBenito 180302a52c5cSStephen Smalley rc = security_get_permissions(newpolicy, objclass, &perms, &nperms); 1804e47c8fc5SChristopher J. PeBenito if (rc) 1805b77a493bSEric Paris return rc; 1806e47c8fc5SChristopher J. PeBenito 1807e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1808e47c8fc5SChristopher J. PeBenito struct inode *inode; 1809e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1810e47c8fc5SChristopher J. PeBenito 1811b77a493bSEric Paris rc = -ENOMEM; 1812e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1813b77a493bSEric Paris if (!dentry) 1814b77a493bSEric Paris goto out; 1815e47c8fc5SChristopher J. PeBenito 1816e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1817b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 18187e4237faSnixiaoming if (!inode) { 18197e4237faSnixiaoming dput(dentry); 1820b77a493bSEric Paris goto out; 18217e4237faSnixiaoming } 1822b77a493bSEric Paris 1823e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1824e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1825e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1826e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1827e47c8fc5SChristopher J. PeBenito } 1828b77a493bSEric Paris rc = 0; 1829b77a493bSEric Paris out: 1830e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1831e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1832e47c8fc5SChristopher J. PeBenito kfree(perms); 1833e47c8fc5SChristopher J. PeBenito return rc; 1834e47c8fc5SChristopher J. PeBenito } 1835e47c8fc5SChristopher J. PeBenito 183602a52c5cSStephen Smalley static int sel_make_class_dir_entries(struct selinux_policy *newpolicy, 183702a52c5cSStephen Smalley char *classname, int index, 1838e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1839e47c8fc5SChristopher J. PeBenito { 18400619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 18410619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1842e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1843e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1844e47c8fc5SChristopher J. PeBenito int rc; 1845e47c8fc5SChristopher J. PeBenito 1846e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1847b77a493bSEric Paris if (!dentry) 1848b77a493bSEric Paris return -ENOMEM; 1849e47c8fc5SChristopher J. PeBenito 1850e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 18517e4237faSnixiaoming if (!inode) { 18527e4237faSnixiaoming dput(dentry); 1853b77a493bSEric Paris return -ENOMEM; 18547e4237faSnixiaoming } 1855e47c8fc5SChristopher J. PeBenito 1856e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1857e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1858e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1859e47c8fc5SChristopher J. PeBenito 18600619f0f5SStephen Smalley dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); 1861a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1862a1c2aa1eSAl Viro return PTR_ERR(dentry); 1863e47c8fc5SChristopher J. PeBenito 186402a52c5cSStephen Smalley rc = sel_make_perm_files(newpolicy, classname, index, dentry); 1865e47c8fc5SChristopher J. PeBenito 1866e47c8fc5SChristopher J. PeBenito return rc; 1867e47c8fc5SChristopher J. PeBenito } 1868e47c8fc5SChristopher J. PeBenito 186902a52c5cSStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi, 187002a52c5cSStephen Smalley struct selinux_policy *newpolicy) 1871e47c8fc5SChristopher J. PeBenito { 18720619f0f5SStephen Smalley 1873b77a493bSEric Paris int rc, nclasses, i; 1874e47c8fc5SChristopher J. PeBenito char **classes; 1875e47c8fc5SChristopher J. PeBenito 1876e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 18770619f0f5SStephen Smalley sel_remove_entries(fsi->class_dir); 1878e47c8fc5SChristopher J. PeBenito 187902a52c5cSStephen Smalley rc = security_get_classes(newpolicy, &classes, &nclasses); 1880b77a493bSEric Paris if (rc) 1881b77a493bSEric Paris return rc; 1882e47c8fc5SChristopher J. PeBenito 1883e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 18840619f0f5SStephen Smalley fsi->last_class_ino = sel_class_to_ino(nclasses + 2); 1885e47c8fc5SChristopher J. PeBenito 1886e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1887e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1888e47c8fc5SChristopher J. PeBenito 18890619f0f5SStephen Smalley class_name_dir = sel_make_dir(fsi->class_dir, classes[i], 18900619f0f5SStephen Smalley &fsi->last_class_ino); 1891a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1892a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1893b77a493bSEric Paris goto out; 1894a1c2aa1eSAl Viro } 1895e47c8fc5SChristopher J. PeBenito 1896e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 189702a52c5cSStephen Smalley rc = sel_make_class_dir_entries(newpolicy, classes[i], i + 1, 1898e47c8fc5SChristopher J. PeBenito class_name_dir); 1899e47c8fc5SChristopher J. PeBenito if (rc) 1900b77a493bSEric Paris goto out; 1901e47c8fc5SChristopher J. PeBenito } 1902b77a493bSEric Paris rc = 0; 1903b77a493bSEric Paris out: 1904e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1905e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1906e47c8fc5SChristopher J. PeBenito kfree(classes); 1907e47c8fc5SChristopher J. PeBenito return rc; 1908e47c8fc5SChristopher J. PeBenito } 1909e47c8fc5SChristopher J. PeBenito 19100619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi) 19113bb56b25SPaul Moore { 19123bb56b25SPaul Moore unsigned int iter; 19133bb56b25SPaul Moore struct dentry *dentry = NULL; 19143bb56b25SPaul Moore struct inode *inode = NULL; 19153bb56b25SPaul Moore 19163bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 19174dc2fce3SStephen Smalley if (iter < ARRAY_SIZE(selinux_policycap_names)) 19180619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, 19194dc2fce3SStephen Smalley selinux_policycap_names[iter]); 19203bb56b25SPaul Moore else 19210619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, "unknown"); 19223bb56b25SPaul Moore 19233bb56b25SPaul Moore if (dentry == NULL) 19243bb56b25SPaul Moore return -ENOMEM; 19253bb56b25SPaul Moore 19260619f0f5SStephen Smalley inode = sel_make_inode(fsi->sb, S_IFREG | 0444); 19277e4237faSnixiaoming if (inode == NULL) { 19287e4237faSnixiaoming dput(dentry); 19293bb56b25SPaul Moore return -ENOMEM; 19307e4237faSnixiaoming } 19313bb56b25SPaul Moore 19323bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 19333bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 19343bb56b25SPaul Moore d_add(dentry, inode); 19353bb56b25SPaul Moore } 19363bb56b25SPaul Moore 19373bb56b25SPaul Moore return 0; 19383bb56b25SPaul Moore } 19393bb56b25SPaul Moore 1940a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 19410dd4ae51SChristopher J. PeBenito unsigned long *ino) 19421da177e4SLinus Torvalds { 1943a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 19441da177e4SLinus Torvalds struct inode *inode; 19451da177e4SLinus Torvalds 1946a1c2aa1eSAl Viro if (!dentry) 1947a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1948a1c2aa1eSAl Viro 1949a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1950a1c2aa1eSAl Viro if (!inode) { 1951a1c2aa1eSAl Viro dput(dentry); 1952a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1953a1c2aa1eSAl Viro } 1954b77a493bSEric Paris 19551da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 19561da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 19570dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 195840e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1959d8c76e6fSDave Hansen inc_nlink(inode); 19601da177e4SLinus Torvalds d_add(dentry, inode); 1961edb20fb5SJames Morris /* bump link count on parent directory, too */ 1962ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1963b77a493bSEric Paris 1964a1c2aa1eSAl Viro return dentry; 19651da177e4SLinus Torvalds } 19661da177e4SLinus Torvalds 19670619f0f5SStephen Smalley #define NULL_FILE_NAME "null" 19680619f0f5SStephen Smalley 1969920f50b2SDavid Howells static int sel_fill_super(struct super_block *sb, struct fs_context *fc) 19701da177e4SLinus Torvalds { 19710619f0f5SStephen Smalley struct selinux_fs_info *fsi; 19721da177e4SLinus Torvalds int ret; 19731da177e4SLinus Torvalds struct dentry *dentry; 1974a1c2aa1eSAl Viro struct inode *inode; 19751da177e4SLinus Torvalds struct inode_security_struct *isec; 19761da177e4SLinus Torvalds 1977cda37124SEric Biggers static const struct tree_descr selinux_files[] = { 19781da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 19791da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1980ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 19811da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 19821da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 19831da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 19841da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 19851da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 19861da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 19871da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 19881da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 19891da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 19901da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 19913f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 19923f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 199311904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 199472e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1995f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1996f9df6458SAndrew Perepechko S_IWUGO}, 19971da177e4SLinus Torvalds /* last one */ {""} 19981da177e4SLinus Torvalds }; 19990619f0f5SStephen Smalley 20000619f0f5SStephen Smalley ret = selinux_fs_info_create(sb); 20010619f0f5SStephen Smalley if (ret) 20020619f0f5SStephen Smalley goto err; 20030619f0f5SStephen Smalley 20041da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 20051da177e4SLinus Torvalds if (ret) 2006161ce45aSJames Morris goto err; 20071da177e4SLinus Torvalds 20080619f0f5SStephen Smalley fsi = sb->s_fs_info; 20090619f0f5SStephen Smalley fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); 20100619f0f5SStephen Smalley if (IS_ERR(fsi->bool_dir)) { 20110619f0f5SStephen Smalley ret = PTR_ERR(fsi->bool_dir); 20120619f0f5SStephen Smalley fsi->bool_dir = NULL; 2013161ce45aSJames Morris goto err; 2014a1c2aa1eSAl Viro } 20151da177e4SLinus Torvalds 2016b77a493bSEric Paris ret = -ENOMEM; 20171da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 2018b77a493bSEric Paris if (!dentry) 2019161ce45aSJames Morris goto err; 20201da177e4SLinus Torvalds 2021161ce45aSJames Morris ret = -ENOMEM; 2022b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 20237e4237faSnixiaoming if (!inode) { 20247e4237faSnixiaoming dput(dentry); 2025161ce45aSJames Morris goto err; 20267e4237faSnixiaoming } 2027b77a493bSEric Paris 20280619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 202980788c22SCasey Schaufler isec = selinux_inode(inode); 20301da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 20311da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 203242059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 20351da177e4SLinus Torvalds d_add(dentry, inode); 20361da177e4SLinus Torvalds 20370619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); 2038a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2039a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2040161ce45aSJames Morris goto err; 2041a1c2aa1eSAl Viro } 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 204466f8e2f0SJeff Vander Stoep 204566f8e2f0SJeff Vander Stoep dentry = sel_make_dir(sb->s_root, "ss", &fsi->last_ino); 204666f8e2f0SJeff Vander Stoep if (IS_ERR(dentry)) { 204766f8e2f0SJeff Vander Stoep ret = PTR_ERR(dentry); 204866f8e2f0SJeff Vander Stoep goto err; 204966f8e2f0SJeff Vander Stoep } 205066f8e2f0SJeff Vander Stoep 205166f8e2f0SJeff Vander Stoep ret = sel_make_ss_files(dentry); 20521da177e4SLinus Torvalds if (ret) 2053161ce45aSJames Morris goto err; 2054f0ee2e46SJames Carter 20550619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); 2056a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 2057a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 2058f0ee2e46SJames Carter goto err; 2059a1c2aa1eSAl Viro } 2060f0ee2e46SJames Carter 2061f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 2062f0ee2e46SJames Carter if (ret) 2063f0ee2e46SJames Carter goto err; 2064f0ee2e46SJames Carter 20650619f0f5SStephen Smalley fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); 20660619f0f5SStephen Smalley if (IS_ERR(fsi->class_dir)) { 20670619f0f5SStephen Smalley ret = PTR_ERR(fsi->class_dir); 20680619f0f5SStephen Smalley fsi->class_dir = NULL; 2069e47c8fc5SChristopher J. PeBenito goto err; 2070a1c2aa1eSAl Viro } 2071e47c8fc5SChristopher J. PeBenito 20720619f0f5SStephen Smalley fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", 20730619f0f5SStephen Smalley &fsi->last_ino); 20740619f0f5SStephen Smalley if (IS_ERR(fsi->policycap_dir)) { 20750619f0f5SStephen Smalley ret = PTR_ERR(fsi->policycap_dir); 20760619f0f5SStephen Smalley fsi->policycap_dir = NULL; 2077e47c8fc5SChristopher J. PeBenito goto err; 2078a1c2aa1eSAl Viro } 20790619f0f5SStephen Smalley 208002a52c5cSStephen Smalley ret = sel_make_policycap(fsi); 208102a52c5cSStephen Smalley if (ret) { 208202a52c5cSStephen Smalley pr_err("SELinux: failed to load policy capabilities\n"); 20830619f0f5SStephen Smalley goto err; 208402a52c5cSStephen Smalley } 208502a52c5cSStephen Smalley 2086b77a493bSEric Paris return 0; 2087161ce45aSJames Morris err: 2088f8b69a5fSpeter enderborg pr_err("SELinux: %s: failed while creating inodes\n", 2089744ba35eSEric Paris __func__); 20900619f0f5SStephen Smalley 20910619f0f5SStephen Smalley selinux_fs_info_free(sb); 20920619f0f5SStephen Smalley 2093b77a493bSEric Paris return ret; 20941da177e4SLinus Torvalds } 20951da177e4SLinus Torvalds 2096920f50b2SDavid Howells static int sel_get_tree(struct fs_context *fc) 20971da177e4SLinus Torvalds { 2098920f50b2SDavid Howells return get_tree_single(fc, sel_fill_super); 2099920f50b2SDavid Howells } 2100920f50b2SDavid Howells 2101920f50b2SDavid Howells static const struct fs_context_operations sel_context_ops = { 2102920f50b2SDavid Howells .get_tree = sel_get_tree, 2103920f50b2SDavid Howells }; 2104920f50b2SDavid Howells 2105920f50b2SDavid Howells static int sel_init_fs_context(struct fs_context *fc) 2106920f50b2SDavid Howells { 2107920f50b2SDavid Howells fc->ops = &sel_context_ops; 2108920f50b2SDavid Howells return 0; 21091da177e4SLinus Torvalds } 21101da177e4SLinus Torvalds 21110619f0f5SStephen Smalley static void sel_kill_sb(struct super_block *sb) 21120619f0f5SStephen Smalley { 21130619f0f5SStephen Smalley selinux_fs_info_free(sb); 21140619f0f5SStephen Smalley kill_litter_super(sb); 21150619f0f5SStephen Smalley } 21160619f0f5SStephen Smalley 21171da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 21181da177e4SLinus Torvalds .name = "selinuxfs", 2119920f50b2SDavid Howells .init_fs_context = sel_init_fs_context, 21200619f0f5SStephen Smalley .kill_sb = sel_kill_sb, 21211da177e4SLinus Torvalds }; 21221da177e4SLinus Torvalds 21231da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 21240619f0f5SStephen Smalley struct path selinux_null; 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvalds static int __init init_sel_fs(void) 21271da177e4SLinus Torvalds { 21280619f0f5SStephen Smalley struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, 21290619f0f5SStephen Smalley sizeof(NULL_FILE_NAME)-1); 21301da177e4SLinus Torvalds int err; 21311da177e4SLinus Torvalds 21326c5a682eSStephen Smalley if (!selinux_enabled_boot) 21331da177e4SLinus Torvalds return 0; 21347a627e3bSGreg Kroah-Hartman 2135f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 2136f9bb4882SEric W. Biederman if (err) 2137f9bb4882SEric W. Biederman return err; 21387a627e3bSGreg Kroah-Hartman 21391da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 21407a627e3bSGreg Kroah-Hartman if (err) { 2141f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2142b77a493bSEric Paris return err; 21437a627e3bSGreg Kroah-Hartman } 2144b77a493bSEric Paris 2145765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 21461da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 2147f8b69a5fSpeter enderborg pr_err("selinuxfs: could not mount!\n"); 21481da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 21491da177e4SLinus Torvalds selinuxfs_mount = NULL; 21501da177e4SLinus Torvalds } 21510619f0f5SStephen Smalley selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, 21520619f0f5SStephen Smalley &null_name); 21530619f0f5SStephen Smalley if (IS_ERR(selinux_null.dentry)) { 21540619f0f5SStephen Smalley pr_err("selinuxfs: could not lookup null!\n"); 21550619f0f5SStephen Smalley err = PTR_ERR(selinux_null.dentry); 21560619f0f5SStephen Smalley selinux_null.dentry = NULL; 21570619f0f5SStephen Smalley } 2158b77a493bSEric Paris 21591da177e4SLinus Torvalds return err; 21601da177e4SLinus Torvalds } 21611da177e4SLinus Torvalds 21621da177e4SLinus Torvalds __initcall(init_sel_fs); 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 21651da177e4SLinus Torvalds void exit_sel_fs(void) 21661da177e4SLinus Torvalds { 2167f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2168fd40ffc7SStephen Smalley dput(selinux_null.dentry); 2169423e0ab0STim Chen kern_unmount(selinuxfs_mount); 21701da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 21711da177e4SLinus Torvalds } 21721da177e4SLinus Torvalds #endif 2173