11da177e4SLinus Torvalds /* Updated: Karl MacMillan <kmacmillan@tresys.com> 21da177e4SLinus Torvalds * 31da177e4SLinus Torvalds * Added conditional policy language extensions 41da177e4SLinus Torvalds * 582c21bfaSPaul Moore * Updated: Hewlett-Packard <paul@paul-moore.com> 63bb56b25SPaul Moore * 73bb56b25SPaul Moore * Added support for the policy capability bitmap 83bb56b25SPaul Moore * 93bb56b25SPaul Moore * Copyright (C) 2007 Hewlett-Packard Development Company, L.P. 101da177e4SLinus Torvalds * Copyright (C) 2003 - 2004 Tresys Technology, LLC 111da177e4SLinus Torvalds * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com> 121da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 131da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 141da177e4SLinus Torvalds * the Free Software Foundation, version 2. 151da177e4SLinus Torvalds */ 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include <linux/kernel.h> 181da177e4SLinus Torvalds #include <linux/pagemap.h> 191da177e4SLinus Torvalds #include <linux/slab.h> 201da177e4SLinus Torvalds #include <linux/vmalloc.h> 211da177e4SLinus Torvalds #include <linux/fs.h> 220619f0f5SStephen Smalley #include <linux/mount.h> 23bb003079SIngo Molnar #include <linux/mutex.h> 241da177e4SLinus Torvalds #include <linux/init.h> 251da177e4SLinus Torvalds #include <linux/string.h> 261da177e4SLinus Torvalds #include <linux/security.h> 271da177e4SLinus Torvalds #include <linux/major.h> 281da177e4SLinus Torvalds #include <linux/seq_file.h> 291da177e4SLinus Torvalds #include <linux/percpu.h> 30af601e46SSteve Grubb #include <linux/audit.h> 31f5269710SEric Paris #include <linux/uaccess.h> 327a627e3bSGreg Kroah-Hartman #include <linux/kobject.h> 330f7e4c33SKohei Kaigai #include <linux/ctype.h> 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds /* selinuxfs pseudo filesystem for exporting the security policy API. 361da177e4SLinus Torvalds Based on the proc code and the fs/nfsd/nfsctl.c code. */ 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds #include "flask.h" 391da177e4SLinus Torvalds #include "avc.h" 401da177e4SLinus Torvalds #include "avc_ss.h" 411da177e4SLinus Torvalds #include "security.h" 421da177e4SLinus Torvalds #include "objsec.h" 431da177e4SLinus Torvalds #include "conditional.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds enum sel_inos { 461da177e4SLinus Torvalds SEL_ROOT_INO = 2, 471da177e4SLinus Torvalds SEL_LOAD, /* load policy */ 481da177e4SLinus Torvalds SEL_ENFORCE, /* get or set enforcing status */ 491da177e4SLinus Torvalds SEL_CONTEXT, /* validate context */ 501da177e4SLinus Torvalds SEL_ACCESS, /* compute access decision */ 511da177e4SLinus Torvalds SEL_CREATE, /* compute create labeling decision */ 521da177e4SLinus Torvalds SEL_RELABEL, /* compute relabeling decision */ 531da177e4SLinus Torvalds SEL_USER, /* compute reachable user contexts */ 541da177e4SLinus Torvalds SEL_POLICYVERS, /* return policy version for this kernel */ 551da177e4SLinus Torvalds SEL_COMMIT_BOOLS, /* commit new boolean values */ 561da177e4SLinus Torvalds SEL_MLS, /* return if MLS policy is enabled */ 571da177e4SLinus Torvalds SEL_DISABLE, /* disable SELinux until next reboot */ 581da177e4SLinus Torvalds SEL_MEMBER, /* compute polyinstantiation membership decision */ 591da177e4SLinus Torvalds SEL_CHECKREQPROT, /* check requested protection, not kernel-applied one */ 604e5ab4cbSJames Morris SEL_COMPAT_NET, /* whether to use old compat network packet controls */ 613f12070eSEric Paris SEL_REJECT_UNKNOWN, /* export unknown reject handling to userspace */ 623f12070eSEric Paris SEL_DENY_UNKNOWN, /* export unknown deny handling to userspace */ 6311904167SKaiGai Kohei SEL_STATUS, /* export current status using mmap() */ 64cee74f47SEric Paris SEL_POLICY, /* allow userspace to read the in kernel policy */ 65f9df6458SAndrew Perepechko SEL_VALIDATE_TRANS, /* compute validatetrans decision */ 666174eafcSJames Carter SEL_INO_NEXT, /* The next inode number to use */ 671da177e4SLinus Torvalds }; 681da177e4SLinus Torvalds 690619f0f5SStephen Smalley struct selinux_fs_info { 700619f0f5SStephen Smalley struct dentry *bool_dir; 710619f0f5SStephen Smalley unsigned int bool_num; 720619f0f5SStephen Smalley char **bool_pending_names; 730619f0f5SStephen Smalley unsigned int *bool_pending_values; 740619f0f5SStephen Smalley struct dentry *class_dir; 750619f0f5SStephen Smalley unsigned long last_class_ino; 760619f0f5SStephen Smalley bool policy_opened; 770619f0f5SStephen Smalley struct dentry *policycap_dir; 780619f0f5SStephen Smalley struct mutex mutex; 790619f0f5SStephen Smalley unsigned long last_ino; 800619f0f5SStephen Smalley struct selinux_state *state; 810619f0f5SStephen Smalley struct super_block *sb; 820619f0f5SStephen Smalley }; 830619f0f5SStephen Smalley 840619f0f5SStephen Smalley static int selinux_fs_info_create(struct super_block *sb) 850619f0f5SStephen Smalley { 860619f0f5SStephen Smalley struct selinux_fs_info *fsi; 870619f0f5SStephen Smalley 880619f0f5SStephen Smalley fsi = kzalloc(sizeof(*fsi), GFP_KERNEL); 890619f0f5SStephen Smalley if (!fsi) 900619f0f5SStephen Smalley return -ENOMEM; 910619f0f5SStephen Smalley 920619f0f5SStephen Smalley mutex_init(&fsi->mutex); 930619f0f5SStephen Smalley fsi->last_ino = SEL_INO_NEXT - 1; 940619f0f5SStephen Smalley fsi->state = &selinux_state; 950619f0f5SStephen Smalley fsi->sb = sb; 960619f0f5SStephen Smalley sb->s_fs_info = fsi; 970619f0f5SStephen Smalley return 0; 980619f0f5SStephen Smalley } 990619f0f5SStephen Smalley 1000619f0f5SStephen Smalley static void selinux_fs_info_free(struct super_block *sb) 1010619f0f5SStephen Smalley { 1020619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1030619f0f5SStephen Smalley int i; 1040619f0f5SStephen Smalley 1050619f0f5SStephen Smalley if (fsi) { 1060619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 1070619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 1080619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 1090619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 1100619f0f5SStephen Smalley } 1110619f0f5SStephen Smalley kfree(sb->s_fs_info); 1120619f0f5SStephen Smalley sb->s_fs_info = NULL; 1130619f0f5SStephen Smalley } 1146174eafcSJames Carter 115f0ee2e46SJames Carter #define SEL_INITCON_INO_OFFSET 0x01000000 116bce34bc0SJames Carter #define SEL_BOOL_INO_OFFSET 0x02000000 117e47c8fc5SChristopher J. PeBenito #define SEL_CLASS_INO_OFFSET 0x04000000 1183bb56b25SPaul Moore #define SEL_POLICYCAP_INO_OFFSET 0x08000000 119f0ee2e46SJames Carter #define SEL_INO_MASK 0x00ffffff 120f0ee2e46SJames Carter 1211da177e4SLinus Torvalds #define TMPBUFLEN 12 1221da177e4SLinus Torvalds static ssize_t sel_read_enforce(struct file *filp, char __user *buf, 1231da177e4SLinus Torvalds size_t count, loff_t *ppos) 1241da177e4SLinus Torvalds { 1250619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 1261da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 1271da177e4SLinus Torvalds ssize_t length; 1281da177e4SLinus Torvalds 129aa8e712cSStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 1300619f0f5SStephen Smalley enforcing_enabled(fsi->state)); 1311da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 1321da177e4SLinus Torvalds } 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DEVELOP 1351da177e4SLinus Torvalds static ssize_t sel_write_enforce(struct file *file, const char __user *buf, 1361da177e4SLinus Torvalds size_t count, loff_t *ppos) 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds { 1390619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1400619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 141b77a493bSEric Paris char *page = NULL; 1421da177e4SLinus Torvalds ssize_t length; 143aa8e712cSStephen Smalley int old_value, new_value; 1441da177e4SLinus Torvalds 145bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 1468365a719SAl Viro return -ENOMEM; 147b77a493bSEric Paris 1481da177e4SLinus Torvalds /* No partial writes. */ 149b77a493bSEric Paris if (*ppos != 0) 1508365a719SAl Viro return -EINVAL; 151b77a493bSEric Paris 1528365a719SAl Viro page = memdup_user_nul(buf, count); 1538365a719SAl Viro if (IS_ERR(page)) 1548365a719SAl Viro return PTR_ERR(page); 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds length = -EINVAL; 1571da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 1581da177e4SLinus Torvalds goto out; 1591da177e4SLinus Torvalds 160ea49d10eSStephen Smalley new_value = !!new_value; 161ea49d10eSStephen Smalley 1620619f0f5SStephen Smalley old_value = enforcing_enabled(state); 163aa8e712cSStephen Smalley if (new_value != old_value) { 1646b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 1656b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 166be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETENFORCE, 167be0554c9SStephen Smalley NULL); 1681da177e4SLinus Torvalds if (length) 1691da177e4SLinus Torvalds goto out; 170cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, 1714195ed42SRichard Guy Briggs "enforcing=%d old_enforcing=%d auid=%u ses=%u" 1724195ed42SRichard Guy Briggs " enabled=%d old-enabled=%d lsm=selinux res=1", 173aa8e712cSStephen Smalley new_value, old_value, 174581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 1754195ed42SRichard Guy Briggs audit_get_sessionid(current), 1764195ed42SRichard Guy Briggs selinux_enabled, selinux_enabled); 1770619f0f5SStephen Smalley enforcing_set(state, new_value); 178aa8e712cSStephen Smalley if (new_value) 1796b6bc620SStephen Smalley avc_ss_reset(state->avc, 0); 180aa8e712cSStephen Smalley selnl_notify_setenforce(new_value); 1810619f0f5SStephen Smalley selinux_status_update_setenforce(state, new_value); 182aa8e712cSStephen Smalley if (!new_value) 1838f408ab6SDaniel Jurgens call_lsm_notifier(LSM_POLICY_CHANGE, NULL); 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds length = count; 1861da177e4SLinus Torvalds out: 1878365a719SAl Viro kfree(page); 1881da177e4SLinus Torvalds return length; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds #else 1911da177e4SLinus Torvalds #define sel_write_enforce NULL 1921da177e4SLinus Torvalds #endif 1931da177e4SLinus Torvalds 1949c2e08c5SArjan van de Ven static const struct file_operations sel_enforce_ops = { 1951da177e4SLinus Torvalds .read = sel_read_enforce, 1961da177e4SLinus Torvalds .write = sel_write_enforce, 19757a62c23SArnd Bergmann .llseek = generic_file_llseek, 1981da177e4SLinus Torvalds }; 1991da177e4SLinus Torvalds 2003f12070eSEric Paris static ssize_t sel_read_handle_unknown(struct file *filp, char __user *buf, 2013f12070eSEric Paris size_t count, loff_t *ppos) 2023f12070eSEric Paris { 2030619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 2040619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 2053f12070eSEric Paris char tmpbuf[TMPBUFLEN]; 2063f12070eSEric Paris ssize_t length; 207496ad9aaSAl Viro ino_t ino = file_inode(filp)->i_ino; 2083f12070eSEric Paris int handle_unknown = (ino == SEL_REJECT_UNKNOWN) ? 2090619f0f5SStephen Smalley security_get_reject_unknown(state) : 2100619f0f5SStephen Smalley !security_get_allow_unknown(state); 2113f12070eSEric Paris 2123f12070eSEric Paris length = scnprintf(tmpbuf, TMPBUFLEN, "%d", handle_unknown); 2133f12070eSEric Paris return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 2143f12070eSEric Paris } 2153f12070eSEric Paris 2163f12070eSEric Paris static const struct file_operations sel_handle_unknown_ops = { 2173f12070eSEric Paris .read = sel_read_handle_unknown, 21857a62c23SArnd Bergmann .llseek = generic_file_llseek, 2193f12070eSEric Paris }; 2203f12070eSEric Paris 22111904167SKaiGai Kohei static int sel_open_handle_status(struct inode *inode, struct file *filp) 22211904167SKaiGai Kohei { 2230619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 2240619f0f5SStephen Smalley struct page *status = selinux_kernel_status_page(fsi->state); 22511904167SKaiGai Kohei 22611904167SKaiGai Kohei if (!status) 22711904167SKaiGai Kohei return -ENOMEM; 22811904167SKaiGai Kohei 22911904167SKaiGai Kohei filp->private_data = status; 23011904167SKaiGai Kohei 23111904167SKaiGai Kohei return 0; 23211904167SKaiGai Kohei } 23311904167SKaiGai Kohei 23411904167SKaiGai Kohei static ssize_t sel_read_handle_status(struct file *filp, char __user *buf, 23511904167SKaiGai Kohei size_t count, loff_t *ppos) 23611904167SKaiGai Kohei { 23711904167SKaiGai Kohei struct page *status = filp->private_data; 23811904167SKaiGai Kohei 23911904167SKaiGai Kohei BUG_ON(!status); 24011904167SKaiGai Kohei 24111904167SKaiGai Kohei return simple_read_from_buffer(buf, count, ppos, 24211904167SKaiGai Kohei page_address(status), 24311904167SKaiGai Kohei sizeof(struct selinux_kernel_status)); 24411904167SKaiGai Kohei } 24511904167SKaiGai Kohei 24611904167SKaiGai Kohei static int sel_mmap_handle_status(struct file *filp, 24711904167SKaiGai Kohei struct vm_area_struct *vma) 24811904167SKaiGai Kohei { 24911904167SKaiGai Kohei struct page *status = filp->private_data; 25011904167SKaiGai Kohei unsigned long size = vma->vm_end - vma->vm_start; 25111904167SKaiGai Kohei 25211904167SKaiGai Kohei BUG_ON(!status); 25311904167SKaiGai Kohei 25411904167SKaiGai Kohei /* only allows one page from the head */ 25511904167SKaiGai Kohei if (vma->vm_pgoff > 0 || size != PAGE_SIZE) 25611904167SKaiGai Kohei return -EIO; 25711904167SKaiGai Kohei /* disallow writable mapping */ 25811904167SKaiGai Kohei if (vma->vm_flags & VM_WRITE) 25911904167SKaiGai Kohei return -EPERM; 26011904167SKaiGai Kohei /* disallow mprotect() turns it into writable */ 26111904167SKaiGai Kohei vma->vm_flags &= ~VM_MAYWRITE; 26211904167SKaiGai Kohei 26311904167SKaiGai Kohei return remap_pfn_range(vma, vma->vm_start, 26411904167SKaiGai Kohei page_to_pfn(status), 26511904167SKaiGai Kohei size, vma->vm_page_prot); 26611904167SKaiGai Kohei } 26711904167SKaiGai Kohei 26811904167SKaiGai Kohei static const struct file_operations sel_handle_status_ops = { 26911904167SKaiGai Kohei .open = sel_open_handle_status, 27011904167SKaiGai Kohei .read = sel_read_handle_status, 27111904167SKaiGai Kohei .mmap = sel_mmap_handle_status, 27211904167SKaiGai Kohei .llseek = generic_file_llseek, 27311904167SKaiGai Kohei }; 27411904167SKaiGai Kohei 2751da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 2761da177e4SLinus Torvalds static ssize_t sel_write_disable(struct file *file, const char __user *buf, 2771da177e4SLinus Torvalds size_t count, loff_t *ppos) 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds { 2800619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 2818365a719SAl Viro char *page; 2821da177e4SLinus Torvalds ssize_t length; 2831da177e4SLinus Torvalds int new_value; 2844195ed42SRichard Guy Briggs int enforcing; 2851da177e4SLinus Torvalds 286bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 2878365a719SAl Viro return -ENOMEM; 288b77a493bSEric Paris 2891da177e4SLinus Torvalds /* No partial writes. */ 290b77a493bSEric Paris if (*ppos != 0) 2918365a719SAl Viro return -EINVAL; 292b77a493bSEric Paris 2938365a719SAl Viro page = memdup_user_nul(buf, count); 2948365a719SAl Viro if (IS_ERR(page)) 2958365a719SAl Viro return PTR_ERR(page); 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds length = -EINVAL; 2981da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 2991da177e4SLinus Torvalds goto out; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (new_value) { 3024195ed42SRichard Guy Briggs enforcing = enforcing_enabled(fsi->state); 3030619f0f5SStephen Smalley length = selinux_disable(fsi->state); 304b77a493bSEric Paris if (length) 3051da177e4SLinus Torvalds goto out; 306cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_STATUS, 3074195ed42SRichard Guy Briggs "enforcing=%d old_enforcing=%d auid=%u ses=%u" 3084195ed42SRichard Guy Briggs " enabled=%d old-enabled=%d lsm=selinux res=1", 3094195ed42SRichard Guy Briggs enforcing, enforcing, 310581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 3114195ed42SRichard Guy Briggs audit_get_sessionid(current), 0, 1); 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds length = count; 3151da177e4SLinus Torvalds out: 3168365a719SAl Viro kfree(page); 3171da177e4SLinus Torvalds return length; 3181da177e4SLinus Torvalds } 3191da177e4SLinus Torvalds #else 3201da177e4SLinus Torvalds #define sel_write_disable NULL 3211da177e4SLinus Torvalds #endif 3221da177e4SLinus Torvalds 3239c2e08c5SArjan van de Ven static const struct file_operations sel_disable_ops = { 3241da177e4SLinus Torvalds .write = sel_write_disable, 32557a62c23SArnd Bergmann .llseek = generic_file_llseek, 3261da177e4SLinus Torvalds }; 3271da177e4SLinus Torvalds 3281da177e4SLinus Torvalds static ssize_t sel_read_policyvers(struct file *filp, char __user *buf, 3291da177e4SLinus Torvalds size_t count, loff_t *ppos) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3321da177e4SLinus Torvalds ssize_t length; 3331da177e4SLinus Torvalds 3341da177e4SLinus Torvalds length = scnprintf(tmpbuf, TMPBUFLEN, "%u", POLICYDB_VERSION_MAX); 3351da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3389c2e08c5SArjan van de Ven static const struct file_operations sel_policyvers_ops = { 3391da177e4SLinus Torvalds .read = sel_read_policyvers, 34057a62c23SArnd Bergmann .llseek = generic_file_llseek, 3411da177e4SLinus Torvalds }; 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* declaration for sel_write_load */ 3440619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi); 3450619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi); 3460619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi); 347e47c8fc5SChristopher J. PeBenito 348e47c8fc5SChristopher J. PeBenito /* declaration for sel_make_class_dirs */ 349a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 350e47c8fc5SChristopher J. PeBenito unsigned long *ino); 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds static ssize_t sel_read_mls(struct file *filp, char __user *buf, 3531da177e4SLinus Torvalds size_t count, loff_t *ppos) 3541da177e4SLinus Torvalds { 3550619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 3561da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 3571da177e4SLinus Torvalds ssize_t length; 3581da177e4SLinus Torvalds 3590719aaf5SGuido Trentalancia length = scnprintf(tmpbuf, TMPBUFLEN, "%d", 3600619f0f5SStephen Smalley security_mls_enabled(fsi->state)); 3611da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 3649c2e08c5SArjan van de Ven static const struct file_operations sel_mls_ops = { 3651da177e4SLinus Torvalds .read = sel_read_mls, 36657a62c23SArnd Bergmann .llseek = generic_file_llseek, 3671da177e4SLinus Torvalds }; 3681da177e4SLinus Torvalds 369cee74f47SEric Paris struct policy_load_memory { 370cee74f47SEric Paris size_t len; 371cee74f47SEric Paris void *data; 372cee74f47SEric Paris }; 373cee74f47SEric Paris 374cee74f47SEric Paris static int sel_open_policy(struct inode *inode, struct file *filp) 375cee74f47SEric Paris { 3760619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 3770619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 378cee74f47SEric Paris struct policy_load_memory *plm = NULL; 379cee74f47SEric Paris int rc; 380cee74f47SEric Paris 381cee74f47SEric Paris BUG_ON(filp->private_data); 382cee74f47SEric Paris 3830619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 384cee74f47SEric Paris 3856b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 3866b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 387be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 388cee74f47SEric Paris if (rc) 389cee74f47SEric Paris goto err; 390cee74f47SEric Paris 391cee74f47SEric Paris rc = -EBUSY; 3920619f0f5SStephen Smalley if (fsi->policy_opened) 393cee74f47SEric Paris goto err; 394cee74f47SEric Paris 395cee74f47SEric Paris rc = -ENOMEM; 396cee74f47SEric Paris plm = kzalloc(sizeof(*plm), GFP_KERNEL); 397cee74f47SEric Paris if (!plm) 398cee74f47SEric Paris goto err; 399cee74f47SEric Paris 4000619f0f5SStephen Smalley if (i_size_read(inode) != security_policydb_len(state)) { 4015955102cSAl Viro inode_lock(inode); 4020619f0f5SStephen Smalley i_size_write(inode, security_policydb_len(state)); 4035955102cSAl Viro inode_unlock(inode); 404cee74f47SEric Paris } 405cee74f47SEric Paris 4060619f0f5SStephen Smalley rc = security_read_policy(state, &plm->data, &plm->len); 407cee74f47SEric Paris if (rc) 408cee74f47SEric Paris goto err; 409cee74f47SEric Paris 4100619f0f5SStephen Smalley fsi->policy_opened = 1; 411cee74f47SEric Paris 412cee74f47SEric Paris filp->private_data = plm; 413cee74f47SEric Paris 4140619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 415cee74f47SEric Paris 416cee74f47SEric Paris return 0; 417cee74f47SEric Paris err: 4180619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 419cee74f47SEric Paris 420cee74f47SEric Paris if (plm) 421cee74f47SEric Paris vfree(plm->data); 422cee74f47SEric Paris kfree(plm); 423cee74f47SEric Paris return rc; 424cee74f47SEric Paris } 425cee74f47SEric Paris 426cee74f47SEric Paris static int sel_release_policy(struct inode *inode, struct file *filp) 427cee74f47SEric Paris { 4280619f0f5SStephen Smalley struct selinux_fs_info *fsi = inode->i_sb->s_fs_info; 429cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 430cee74f47SEric Paris 431cee74f47SEric Paris BUG_ON(!plm); 432cee74f47SEric Paris 4330619f0f5SStephen Smalley fsi->policy_opened = 0; 434cee74f47SEric Paris 435cee74f47SEric Paris vfree(plm->data); 436cee74f47SEric Paris kfree(plm); 437cee74f47SEric Paris 438cee74f47SEric Paris return 0; 439cee74f47SEric Paris } 440cee74f47SEric Paris 441cee74f47SEric Paris static ssize_t sel_read_policy(struct file *filp, char __user *buf, 442cee74f47SEric Paris size_t count, loff_t *ppos) 443cee74f47SEric Paris { 4440619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 445cee74f47SEric Paris struct policy_load_memory *plm = filp->private_data; 446cee74f47SEric Paris int ret; 447cee74f47SEric Paris 4480619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 449cee74f47SEric Paris 4506b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 4516b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 452be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__READ_POLICY, NULL); 453cee74f47SEric Paris if (ret) 454cee74f47SEric Paris goto out; 455cee74f47SEric Paris 456cee74f47SEric Paris ret = simple_read_from_buffer(buf, count, ppos, plm->data, plm->len); 457cee74f47SEric Paris out: 4580619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 459cee74f47SEric Paris return ret; 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 5120619f0f5SStephen Smalley static int sel_make_policy_nodes(struct selinux_fs_info *fsi) 5130619f0f5SStephen Smalley { 5140619f0f5SStephen Smalley int ret; 5150619f0f5SStephen Smalley 5160619f0f5SStephen Smalley ret = sel_make_bools(fsi); 5170619f0f5SStephen Smalley if (ret) { 5180619f0f5SStephen Smalley pr_err("SELinux: failed to load policy booleans\n"); 5190619f0f5SStephen Smalley return ret; 5200619f0f5SStephen Smalley } 5210619f0f5SStephen Smalley 5220619f0f5SStephen Smalley ret = sel_make_classes(fsi); 5230619f0f5SStephen Smalley if (ret) { 5240619f0f5SStephen Smalley pr_err("SELinux: failed to load policy classes\n"); 5250619f0f5SStephen Smalley return ret; 5260619f0f5SStephen Smalley } 5270619f0f5SStephen Smalley 5280619f0f5SStephen Smalley ret = sel_make_policycap(fsi); 5290619f0f5SStephen Smalley if (ret) { 5300619f0f5SStephen Smalley pr_err("SELinux: failed to load policy capabilities\n"); 5310619f0f5SStephen Smalley return ret; 5320619f0f5SStephen Smalley } 5330619f0f5SStephen Smalley 5340619f0f5SStephen Smalley return 0; 5350619f0f5SStephen Smalley } 5360619f0f5SStephen Smalley 5371da177e4SLinus Torvalds static ssize_t sel_write_load(struct file *file, const char __user *buf, 5381da177e4SLinus Torvalds size_t count, loff_t *ppos) 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds { 5410619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 5421da177e4SLinus Torvalds ssize_t length; 5431da177e4SLinus Torvalds void *data = NULL; 5441da177e4SLinus Torvalds 5450619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 5461da177e4SLinus Torvalds 5476b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 5486b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 549be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__LOAD_POLICY, NULL); 5501da177e4SLinus Torvalds if (length) 5511da177e4SLinus Torvalds goto out; 5521da177e4SLinus Torvalds 5531da177e4SLinus Torvalds /* No partial writes. */ 5541da177e4SLinus Torvalds length = -EINVAL; 555b77a493bSEric Paris if (*ppos != 0) 5561da177e4SLinus Torvalds goto out; 5571da177e4SLinus Torvalds 558b77a493bSEric Paris length = -EFBIG; 559b77a493bSEric Paris if (count > 64 * 1024 * 1024) 5601da177e4SLinus Torvalds goto out; 561b77a493bSEric Paris 562b77a493bSEric Paris length = -ENOMEM; 563b77a493bSEric Paris data = vmalloc(count); 564b77a493bSEric Paris if (!data) 565b77a493bSEric Paris goto out; 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds length = -EFAULT; 5681da177e4SLinus Torvalds if (copy_from_user(data, buf, count) != 0) 5691da177e4SLinus Torvalds goto out; 5701da177e4SLinus Torvalds 5710619f0f5SStephen Smalley length = security_load_policy(fsi->state, data, count); 5724262fb51SGary Tierney if (length) { 5734262fb51SGary Tierney pr_warn_ratelimited("SELinux: failed to load policy\n"); 5741da177e4SLinus Torvalds goto out; 5754262fb51SGary Tierney } 5761da177e4SLinus Torvalds 5770619f0f5SStephen Smalley length = sel_make_policy_nodes(fsi); 5780619f0f5SStephen Smalley if (length) 579e47c8fc5SChristopher J. PeBenito goto out1; 580b77a493bSEric Paris 5811da177e4SLinus Torvalds length = count; 582e47c8fc5SChristopher J. PeBenito 583e47c8fc5SChristopher J. PeBenito out1: 584cdfb6b34SRichard Guy Briggs audit_log(audit_context(), GFP_KERNEL, AUDIT_MAC_POLICY_LOAD, 585d141136fSRichard Guy Briggs "auid=%u ses=%u lsm=selinux res=1", 586581abc09SEric W. Biederman from_kuid(&init_user_ns, audit_get_loginuid(current)), 5874746ec5bSEric Paris audit_get_sessionid(current)); 5881da177e4SLinus Torvalds out: 5890619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 5901da177e4SLinus Torvalds vfree(data); 5911da177e4SLinus Torvalds return length; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 5949c2e08c5SArjan van de Ven static const struct file_operations sel_load_ops = { 5951da177e4SLinus Torvalds .write = sel_write_load, 59657a62c23SArnd Bergmann .llseek = generic_file_llseek, 5971da177e4SLinus Torvalds }; 5981da177e4SLinus Torvalds 599ce9982d0SStephen Smalley static ssize_t sel_write_context(struct file *file, char *buf, size_t size) 6001da177e4SLinus Torvalds { 6010619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6020619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 603b77a493bSEric Paris char *canon = NULL; 604ce9982d0SStephen Smalley u32 sid, len; 6051da177e4SLinus Torvalds ssize_t length; 6061da177e4SLinus Torvalds 6076b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6086b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 609be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__CHECK_CONTEXT, NULL); 6101da177e4SLinus Torvalds if (length) 611b77a493bSEric Paris goto out; 6121da177e4SLinus Torvalds 6130619f0f5SStephen Smalley length = security_context_to_sid(state, buf, size, &sid, GFP_KERNEL); 614b77a493bSEric Paris if (length) 615b77a493bSEric Paris goto out; 6161da177e4SLinus Torvalds 6170619f0f5SStephen Smalley length = security_sid_to_context(state, sid, &canon, &len); 618b77a493bSEric Paris if (length) 619b77a493bSEric Paris goto out; 620ce9982d0SStephen Smalley 621b77a493bSEric Paris length = -ERANGE; 622ce9982d0SStephen Smalley if (len > SIMPLE_TRANSACTION_LIMIT) { 623f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 624744ba35eSEric Paris "payload max\n", __func__, len); 625ce9982d0SStephen Smalley goto out; 626ce9982d0SStephen Smalley } 627ce9982d0SStephen Smalley 628ce9982d0SStephen Smalley memcpy(buf, canon, len); 629ce9982d0SStephen Smalley length = len; 6301da177e4SLinus Torvalds out: 631ce9982d0SStephen Smalley kfree(canon); 6321da177e4SLinus Torvalds return length; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds static ssize_t sel_read_checkreqprot(struct file *filp, char __user *buf, 6361da177e4SLinus Torvalds size_t count, loff_t *ppos) 6371da177e4SLinus Torvalds { 6380619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 6391da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 6401da177e4SLinus Torvalds ssize_t length; 6411da177e4SLinus Torvalds 6420619f0f5SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", fsi->state->checkreqprot); 6431da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds 6461da177e4SLinus Torvalds static ssize_t sel_write_checkreqprot(struct file *file, const char __user *buf, 6471da177e4SLinus Torvalds size_t count, loff_t *ppos) 6481da177e4SLinus Torvalds { 6490619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6508365a719SAl Viro char *page; 6511da177e4SLinus Torvalds ssize_t length; 6521da177e4SLinus Torvalds unsigned int new_value; 6531da177e4SLinus Torvalds 6546b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 6556b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 656be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETCHECKREQPROT, 657be0554c9SStephen Smalley NULL); 6581da177e4SLinus Torvalds if (length) 6598365a719SAl Viro return length; 6601da177e4SLinus Torvalds 661bfd51626SDavi Arnaut if (count >= PAGE_SIZE) 6628365a719SAl Viro return -ENOMEM; 663b77a493bSEric Paris 6641da177e4SLinus Torvalds /* No partial writes. */ 665b77a493bSEric Paris if (*ppos != 0) 6668365a719SAl Viro return -EINVAL; 667b77a493bSEric Paris 6688365a719SAl Viro page = memdup_user_nul(buf, count); 6698365a719SAl Viro if (IS_ERR(page)) 6708365a719SAl Viro return PTR_ERR(page); 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds length = -EINVAL; 6731da177e4SLinus Torvalds if (sscanf(page, "%u", &new_value) != 1) 6741da177e4SLinus Torvalds goto out; 6751da177e4SLinus Torvalds 6760619f0f5SStephen Smalley fsi->state->checkreqprot = new_value ? 1 : 0; 6771da177e4SLinus Torvalds length = count; 6781da177e4SLinus Torvalds out: 6798365a719SAl Viro kfree(page); 6801da177e4SLinus Torvalds return length; 6811da177e4SLinus Torvalds } 6829c2e08c5SArjan van de Ven static const struct file_operations sel_checkreqprot_ops = { 6831da177e4SLinus Torvalds .read = sel_read_checkreqprot, 6841da177e4SLinus Torvalds .write = sel_write_checkreqprot, 68557a62c23SArnd Bergmann .llseek = generic_file_llseek, 6861da177e4SLinus Torvalds }; 6871da177e4SLinus Torvalds 688f9df6458SAndrew Perepechko static ssize_t sel_write_validatetrans(struct file *file, 689f9df6458SAndrew Perepechko const char __user *buf, 690f9df6458SAndrew Perepechko size_t count, loff_t *ppos) 691f9df6458SAndrew Perepechko { 6920619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 6930619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 694f9df6458SAndrew Perepechko char *oldcon = NULL, *newcon = NULL, *taskcon = NULL; 695f9df6458SAndrew Perepechko char *req = NULL; 696f9df6458SAndrew Perepechko u32 osid, nsid, tsid; 697f9df6458SAndrew Perepechko u16 tclass; 698f9df6458SAndrew Perepechko int rc; 699f9df6458SAndrew Perepechko 7006b6bc620SStephen Smalley rc = avc_has_perm(&selinux_state, 7016b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 702be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__VALIDATE_TRANS, NULL); 703f9df6458SAndrew Perepechko if (rc) 704f9df6458SAndrew Perepechko goto out; 705f9df6458SAndrew Perepechko 706f9df6458SAndrew Perepechko rc = -ENOMEM; 707f9df6458SAndrew Perepechko if (count >= PAGE_SIZE) 708f9df6458SAndrew Perepechko goto out; 709f9df6458SAndrew Perepechko 710f9df6458SAndrew Perepechko /* No partial writes. */ 711f9df6458SAndrew Perepechko rc = -EINVAL; 712f9df6458SAndrew Perepechko if (*ppos != 0) 713f9df6458SAndrew Perepechko goto out; 714f9df6458SAndrew Perepechko 7150b884d25SAl Viro req = memdup_user_nul(buf, count); 7160b884d25SAl Viro if (IS_ERR(req)) { 7170b884d25SAl Viro rc = PTR_ERR(req); 7180b884d25SAl Viro req = NULL; 719f9df6458SAndrew Perepechko goto out; 7200b884d25SAl Viro } 721f9df6458SAndrew Perepechko 722f9df6458SAndrew Perepechko rc = -ENOMEM; 723f9df6458SAndrew Perepechko oldcon = kzalloc(count + 1, GFP_KERNEL); 724f9df6458SAndrew Perepechko if (!oldcon) 725f9df6458SAndrew Perepechko goto out; 726f9df6458SAndrew Perepechko 727f9df6458SAndrew Perepechko newcon = kzalloc(count + 1, GFP_KERNEL); 728f9df6458SAndrew Perepechko if (!newcon) 729f9df6458SAndrew Perepechko goto out; 730f9df6458SAndrew Perepechko 731f9df6458SAndrew Perepechko taskcon = kzalloc(count + 1, GFP_KERNEL); 732f9df6458SAndrew Perepechko if (!taskcon) 733f9df6458SAndrew Perepechko goto out; 734f9df6458SAndrew Perepechko 735f9df6458SAndrew Perepechko rc = -EINVAL; 736f9df6458SAndrew Perepechko if (sscanf(req, "%s %s %hu %s", oldcon, newcon, &tclass, taskcon) != 4) 737f9df6458SAndrew Perepechko goto out; 738f9df6458SAndrew Perepechko 7390619f0f5SStephen Smalley rc = security_context_str_to_sid(state, oldcon, &osid, GFP_KERNEL); 740f9df6458SAndrew Perepechko if (rc) 741f9df6458SAndrew Perepechko goto out; 742f9df6458SAndrew Perepechko 7430619f0f5SStephen Smalley rc = security_context_str_to_sid(state, newcon, &nsid, GFP_KERNEL); 744f9df6458SAndrew Perepechko if (rc) 745f9df6458SAndrew Perepechko goto out; 746f9df6458SAndrew Perepechko 7470619f0f5SStephen Smalley rc = security_context_str_to_sid(state, taskcon, &tsid, GFP_KERNEL); 748f9df6458SAndrew Perepechko if (rc) 749f9df6458SAndrew Perepechko goto out; 750f9df6458SAndrew Perepechko 7510619f0f5SStephen Smalley rc = security_validate_transition_user(state, osid, nsid, tsid, tclass); 752f9df6458SAndrew Perepechko if (!rc) 753f9df6458SAndrew Perepechko rc = count; 754f9df6458SAndrew Perepechko out: 755f9df6458SAndrew Perepechko kfree(req); 756f9df6458SAndrew Perepechko kfree(oldcon); 757f9df6458SAndrew Perepechko kfree(newcon); 758f9df6458SAndrew Perepechko kfree(taskcon); 759f9df6458SAndrew Perepechko return rc; 760f9df6458SAndrew Perepechko } 761f9df6458SAndrew Perepechko 762f9df6458SAndrew Perepechko static const struct file_operations sel_transition_ops = { 763f9df6458SAndrew Perepechko .write = sel_write_validatetrans, 764f9df6458SAndrew Perepechko .llseek = generic_file_llseek, 765f9df6458SAndrew Perepechko }; 766f9df6458SAndrew Perepechko 7671da177e4SLinus Torvalds /* 7681da177e4SLinus Torvalds * Remaining nodes use transaction based IO methods like nfsd/nfsctl.c 7691da177e4SLinus Torvalds */ 7701da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size); 7711da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size); 7721da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size); 7731da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size); 7741da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size); 7751da177e4SLinus Torvalds 776631d2b49SEric Biggers static ssize_t (*const write_op[])(struct file *, char *, size_t) = { 7771da177e4SLinus Torvalds [SEL_ACCESS] = sel_write_access, 7781da177e4SLinus Torvalds [SEL_CREATE] = sel_write_create, 7791da177e4SLinus Torvalds [SEL_RELABEL] = sel_write_relabel, 7801da177e4SLinus Torvalds [SEL_USER] = sel_write_user, 7811da177e4SLinus Torvalds [SEL_MEMBER] = sel_write_member, 782ce9982d0SStephen Smalley [SEL_CONTEXT] = sel_write_context, 7831da177e4SLinus Torvalds }; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds static ssize_t selinux_transaction_write(struct file *file, const char __user *buf, size_t size, loff_t *pos) 7861da177e4SLinus Torvalds { 787496ad9aaSAl Viro ino_t ino = file_inode(file)->i_ino; 7881da177e4SLinus Torvalds char *data; 7891da177e4SLinus Torvalds ssize_t rv; 7901da177e4SLinus Torvalds 7916e20a64aSNicolas Kaiser if (ino >= ARRAY_SIZE(write_op) || !write_op[ino]) 7921da177e4SLinus Torvalds return -EINVAL; 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds data = simple_transaction_get(file, buf, size); 7951da177e4SLinus Torvalds if (IS_ERR(data)) 7961da177e4SLinus Torvalds return PTR_ERR(data); 7971da177e4SLinus Torvalds 7981da177e4SLinus Torvalds rv = write_op[ino](file, data, size); 7991da177e4SLinus Torvalds if (rv > 0) { 8001da177e4SLinus Torvalds simple_transaction_set(file, rv); 8011da177e4SLinus Torvalds rv = size; 8021da177e4SLinus Torvalds } 8031da177e4SLinus Torvalds return rv; 8041da177e4SLinus Torvalds } 8051da177e4SLinus Torvalds 8069c2e08c5SArjan van de Ven static const struct file_operations transaction_ops = { 8071da177e4SLinus Torvalds .write = selinux_transaction_write, 8081da177e4SLinus Torvalds .read = simple_transaction_read, 8091da177e4SLinus Torvalds .release = simple_transaction_release, 81057a62c23SArnd Bergmann .llseek = generic_file_llseek, 8111da177e4SLinus Torvalds }; 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds /* 8141da177e4SLinus Torvalds * payload - write methods 8151da177e4SLinus Torvalds * If the method has a response, the response should be put in buf, 8161da177e4SLinus Torvalds * and the length returned. Otherwise return 0 or and -error. 8171da177e4SLinus Torvalds */ 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds static ssize_t sel_write_access(struct file *file, char *buf, size_t size) 8201da177e4SLinus Torvalds { 8210619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8220619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 823b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 8241da177e4SLinus Torvalds u32 ssid, tsid; 8251da177e4SLinus Torvalds u16 tclass; 8261da177e4SLinus Torvalds struct av_decision avd; 8271da177e4SLinus Torvalds ssize_t length; 8281da177e4SLinus Torvalds 8296b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8306b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 831be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_AV, NULL); 8321da177e4SLinus Torvalds if (length) 833b77a493bSEric Paris goto out; 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds length = -ENOMEM; 83689d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8371da177e4SLinus Torvalds if (!scon) 838b77a493bSEric Paris goto out; 8391da177e4SLinus Torvalds 840b77a493bSEric Paris length = -ENOMEM; 84189d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8421da177e4SLinus Torvalds if (!tcon) 8431da177e4SLinus Torvalds goto out; 8441da177e4SLinus Torvalds 8451da177e4SLinus Torvalds length = -EINVAL; 84619439d05SStephen Smalley if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 847b77a493bSEric Paris goto out; 8481da177e4SLinus Torvalds 8490619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 850b77a493bSEric Paris if (length) 851b77a493bSEric Paris goto out; 852b77a493bSEric Paris 8530619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 854b77a493bSEric Paris if (length) 855b77a493bSEric Paris goto out; 8561da177e4SLinus Torvalds 8570619f0f5SStephen Smalley security_compute_av_user(state, ssid, tsid, tclass, &avd); 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds length = scnprintf(buf, SIMPLE_TRANSACTION_LIMIT, 8608a6f83afSKaiGai Kohei "%x %x %x %x %u %x", 861f1c6381aSEric Paris avd.allowed, 0xffffffff, 8621da177e4SLinus Torvalds avd.auditallow, avd.auditdeny, 8638a6f83afSKaiGai Kohei avd.seqno, avd.flags); 8641da177e4SLinus Torvalds out: 865b77a493bSEric Paris kfree(tcon); 8661da177e4SLinus Torvalds kfree(scon); 8671da177e4SLinus Torvalds return length; 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds static ssize_t sel_write_create(struct file *file, char *buf, size_t size) 8711da177e4SLinus Torvalds { 8720619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 8730619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 874b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 875f50a3ec9SKohei Kaigai char *namebuf = NULL, *objname = NULL; 8761da177e4SLinus Torvalds u32 ssid, tsid, newsid; 8771da177e4SLinus Torvalds u16 tclass; 8781da177e4SLinus Torvalds ssize_t length; 879b77a493bSEric Paris char *newcon = NULL; 8801da177e4SLinus Torvalds u32 len; 881f50a3ec9SKohei Kaigai int nargs; 8821da177e4SLinus Torvalds 8836b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 8846b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 885be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_CREATE, 886be0554c9SStephen Smalley NULL); 8871da177e4SLinus Torvalds if (length) 888b77a493bSEric Paris goto out; 8891da177e4SLinus Torvalds 8901da177e4SLinus Torvalds length = -ENOMEM; 89189d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 8921da177e4SLinus Torvalds if (!scon) 893b77a493bSEric Paris goto out; 8941da177e4SLinus Torvalds 895b77a493bSEric Paris length = -ENOMEM; 89689d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 8971da177e4SLinus Torvalds if (!tcon) 8981da177e4SLinus Torvalds goto out; 8991da177e4SLinus Torvalds 900f50a3ec9SKohei Kaigai length = -ENOMEM; 901f50a3ec9SKohei Kaigai namebuf = kzalloc(size + 1, GFP_KERNEL); 902f50a3ec9SKohei Kaigai if (!namebuf) 903b77a493bSEric Paris goto out; 9041da177e4SLinus Torvalds 905f50a3ec9SKohei Kaigai length = -EINVAL; 906f50a3ec9SKohei Kaigai nargs = sscanf(buf, "%s %s %hu %s", scon, tcon, &tclass, namebuf); 907f50a3ec9SKohei Kaigai if (nargs < 3 || nargs > 4) 908f50a3ec9SKohei Kaigai goto out; 9090f7e4c33SKohei Kaigai if (nargs == 4) { 9100f7e4c33SKohei Kaigai /* 9110f7e4c33SKohei Kaigai * If and when the name of new object to be queried contains 9120f7e4c33SKohei Kaigai * either whitespace or multibyte characters, they shall be 9130f7e4c33SKohei Kaigai * encoded based on the percentage-encoding rule. 9140f7e4c33SKohei Kaigai * If not encoded, the sscanf logic picks up only left-half 9150f7e4c33SKohei Kaigai * of the supplied name; splitted by a whitespace unexpectedly. 9160f7e4c33SKohei Kaigai */ 9170f7e4c33SKohei Kaigai char *r, *w; 9180f7e4c33SKohei Kaigai int c1, c2; 9190f7e4c33SKohei Kaigai 9200f7e4c33SKohei Kaigai r = w = namebuf; 9210f7e4c33SKohei Kaigai do { 9220f7e4c33SKohei Kaigai c1 = *r++; 9230f7e4c33SKohei Kaigai if (c1 == '+') 9240f7e4c33SKohei Kaigai c1 = ' '; 9250f7e4c33SKohei Kaigai else if (c1 == '%') { 926af7ff2c2SAndy Shevchenko c1 = hex_to_bin(*r++); 927af7ff2c2SAndy Shevchenko if (c1 < 0) 9280f7e4c33SKohei Kaigai goto out; 929af7ff2c2SAndy Shevchenko c2 = hex_to_bin(*r++); 930af7ff2c2SAndy Shevchenko if (c2 < 0) 9310f7e4c33SKohei Kaigai goto out; 9320f7e4c33SKohei Kaigai c1 = (c1 << 4) | c2; 9330f7e4c33SKohei Kaigai } 9340f7e4c33SKohei Kaigai *w++ = c1; 9350f7e4c33SKohei Kaigai } while (c1 != '\0'); 9360f7e4c33SKohei Kaigai 937f50a3ec9SKohei Kaigai objname = namebuf; 9380f7e4c33SKohei Kaigai } 939f50a3ec9SKohei Kaigai 9400619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 941b77a493bSEric Paris if (length) 942b77a493bSEric Paris goto out; 943b77a493bSEric Paris 9440619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 945b77a493bSEric Paris if (length) 946b77a493bSEric Paris goto out; 9471da177e4SLinus Torvalds 9480619f0f5SStephen Smalley length = security_transition_sid_user(state, ssid, tsid, tclass, 9490619f0f5SStephen Smalley objname, &newsid); 950b77a493bSEric Paris if (length) 951b77a493bSEric Paris goto out; 9521da177e4SLinus Torvalds 9530619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 954b77a493bSEric Paris if (length) 955b77a493bSEric Paris goto out; 9561da177e4SLinus Torvalds 957b77a493bSEric Paris length = -ERANGE; 9581da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 959f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 960744ba35eSEric Paris "payload max\n", __func__, len); 961b77a493bSEric Paris goto out; 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds 9641da177e4SLinus Torvalds memcpy(buf, newcon, len); 9651da177e4SLinus Torvalds length = len; 9661da177e4SLinus Torvalds out: 967b77a493bSEric Paris kfree(newcon); 968f50a3ec9SKohei Kaigai kfree(namebuf); 969b77a493bSEric Paris kfree(tcon); 9701da177e4SLinus Torvalds kfree(scon); 9711da177e4SLinus Torvalds return length; 9721da177e4SLinus Torvalds } 9731da177e4SLinus Torvalds 9741da177e4SLinus Torvalds static ssize_t sel_write_relabel(struct file *file, char *buf, size_t size) 9751da177e4SLinus Torvalds { 9760619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 9770619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 978b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 9791da177e4SLinus Torvalds u32 ssid, tsid, newsid; 9801da177e4SLinus Torvalds u16 tclass; 9811da177e4SLinus Torvalds ssize_t length; 982b77a493bSEric Paris char *newcon = NULL; 9831da177e4SLinus Torvalds u32 len; 9841da177e4SLinus Torvalds 9856b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 9866b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 987be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_RELABEL, 988be0554c9SStephen Smalley NULL); 9891da177e4SLinus Torvalds if (length) 990b77a493bSEric Paris goto out; 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds length = -ENOMEM; 99389d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 9941da177e4SLinus Torvalds if (!scon) 995b77a493bSEric Paris goto out; 9961da177e4SLinus Torvalds 997b77a493bSEric Paris length = -ENOMEM; 99889d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 9991da177e4SLinus Torvalds if (!tcon) 10001da177e4SLinus Torvalds goto out; 10011da177e4SLinus Torvalds 10021da177e4SLinus Torvalds length = -EINVAL; 10031da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1004b77a493bSEric Paris goto out; 10051da177e4SLinus Torvalds 10060619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1007b77a493bSEric Paris if (length) 1008b77a493bSEric Paris goto out; 1009b77a493bSEric Paris 10100619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1011b77a493bSEric Paris if (length) 1012b77a493bSEric Paris goto out; 10131da177e4SLinus Torvalds 10140619f0f5SStephen Smalley length = security_change_sid(state, ssid, tsid, tclass, &newsid); 1015b77a493bSEric Paris if (length) 1016b77a493bSEric Paris goto out; 10171da177e4SLinus Torvalds 10180619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1019b77a493bSEric Paris if (length) 1020b77a493bSEric Paris goto out; 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds length = -ERANGE; 1023b77a493bSEric Paris if (len > SIMPLE_TRANSACTION_LIMIT) 1024b77a493bSEric Paris goto out; 10251da177e4SLinus Torvalds 10261da177e4SLinus Torvalds memcpy(buf, newcon, len); 10271da177e4SLinus Torvalds length = len; 10281da177e4SLinus Torvalds out: 1029b77a493bSEric Paris kfree(newcon); 1030b77a493bSEric Paris kfree(tcon); 10311da177e4SLinus Torvalds kfree(scon); 10321da177e4SLinus Torvalds return length; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds 10351da177e4SLinus Torvalds static ssize_t sel_write_user(struct file *file, char *buf, size_t size) 10361da177e4SLinus Torvalds { 10370619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 10380619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1039b77a493bSEric Paris char *con = NULL, *user = NULL, *ptr; 1040b77a493bSEric Paris u32 sid, *sids = NULL; 10411da177e4SLinus Torvalds ssize_t length; 10421da177e4SLinus Torvalds char *newcon; 10431da177e4SLinus Torvalds int i, rc; 10441da177e4SLinus Torvalds u32 len, nsids; 10451da177e4SLinus Torvalds 10466b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 10476b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1048be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_USER, 1049be0554c9SStephen Smalley NULL); 10501da177e4SLinus Torvalds if (length) 10516eab04a8SJustin P. Mattock goto out; 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds length = -ENOMEM; 105489d155efSJames Morris con = kzalloc(size + 1, GFP_KERNEL); 10551da177e4SLinus Torvalds if (!con) 10566eab04a8SJustin P. Mattock goto out; 10571da177e4SLinus Torvalds 1058b77a493bSEric Paris length = -ENOMEM; 105989d155efSJames Morris user = kzalloc(size + 1, GFP_KERNEL); 10601da177e4SLinus Torvalds if (!user) 10611da177e4SLinus Torvalds goto out; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds length = -EINVAL; 10641da177e4SLinus Torvalds if (sscanf(buf, "%s %s", con, user) != 2) 1065b77a493bSEric Paris goto out; 10661da177e4SLinus Torvalds 10670619f0f5SStephen Smalley length = security_context_str_to_sid(state, con, &sid, GFP_KERNEL); 1068b77a493bSEric Paris if (length) 1069b77a493bSEric Paris goto out; 10701da177e4SLinus Torvalds 10710619f0f5SStephen Smalley length = security_get_user_sids(state, sid, user, &sids, &nsids); 1072b77a493bSEric Paris if (length) 1073b77a493bSEric Paris goto out; 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds length = sprintf(buf, "%u", nsids) + 1; 10761da177e4SLinus Torvalds ptr = buf + length; 10771da177e4SLinus Torvalds for (i = 0; i < nsids; i++) { 10780619f0f5SStephen Smalley rc = security_sid_to_context(state, sids[i], &newcon, &len); 10791da177e4SLinus Torvalds if (rc) { 10801da177e4SLinus Torvalds length = rc; 1081b77a493bSEric Paris goto out; 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds if ((length + len) >= SIMPLE_TRANSACTION_LIMIT) { 10841da177e4SLinus Torvalds kfree(newcon); 10851da177e4SLinus Torvalds length = -ERANGE; 1086b77a493bSEric Paris goto out; 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds memcpy(ptr, newcon, len); 10891da177e4SLinus Torvalds kfree(newcon); 10901da177e4SLinus Torvalds ptr += len; 10911da177e4SLinus Torvalds length += len; 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds out: 1094b77a493bSEric Paris kfree(sids); 1095b77a493bSEric Paris kfree(user); 10961da177e4SLinus Torvalds kfree(con); 10971da177e4SLinus Torvalds return length; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds static ssize_t sel_write_member(struct file *file, char *buf, size_t size) 11011da177e4SLinus Torvalds { 11020619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 11030619f0f5SStephen Smalley struct selinux_state *state = fsi->state; 1104b77a493bSEric Paris char *scon = NULL, *tcon = NULL; 11051da177e4SLinus Torvalds u32 ssid, tsid, newsid; 11061da177e4SLinus Torvalds u16 tclass; 11071da177e4SLinus Torvalds ssize_t length; 1108b77a493bSEric Paris char *newcon = NULL; 11091da177e4SLinus Torvalds u32 len; 11101da177e4SLinus Torvalds 11116b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 11126b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1113be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__COMPUTE_MEMBER, 1114be0554c9SStephen Smalley NULL); 11151da177e4SLinus Torvalds if (length) 1116b77a493bSEric Paris goto out; 11171da177e4SLinus Torvalds 11181da177e4SLinus Torvalds length = -ENOMEM; 111989d155efSJames Morris scon = kzalloc(size + 1, GFP_KERNEL); 11201da177e4SLinus Torvalds if (!scon) 11216eab04a8SJustin P. Mattock goto out; 11221da177e4SLinus Torvalds 1123b77a493bSEric Paris length = -ENOMEM; 112489d155efSJames Morris tcon = kzalloc(size + 1, GFP_KERNEL); 11251da177e4SLinus Torvalds if (!tcon) 11261da177e4SLinus Torvalds goto out; 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds length = -EINVAL; 11291da177e4SLinus Torvalds if (sscanf(buf, "%s %s %hu", scon, tcon, &tclass) != 3) 1130b77a493bSEric Paris goto out; 11311da177e4SLinus Torvalds 11320619f0f5SStephen Smalley length = security_context_str_to_sid(state, scon, &ssid, GFP_KERNEL); 1133b77a493bSEric Paris if (length) 1134b77a493bSEric Paris goto out; 1135b77a493bSEric Paris 11360619f0f5SStephen Smalley length = security_context_str_to_sid(state, tcon, &tsid, GFP_KERNEL); 1137b77a493bSEric Paris if (length) 1138b77a493bSEric Paris goto out; 11391da177e4SLinus Torvalds 11400619f0f5SStephen Smalley length = security_member_sid(state, ssid, tsid, tclass, &newsid); 1141b77a493bSEric Paris if (length) 1142b77a493bSEric Paris goto out; 11431da177e4SLinus Torvalds 11440619f0f5SStephen Smalley length = security_sid_to_context(state, newsid, &newcon, &len); 1145b77a493bSEric Paris if (length) 1146b77a493bSEric Paris goto out; 11471da177e4SLinus Torvalds 1148b77a493bSEric Paris length = -ERANGE; 11491da177e4SLinus Torvalds if (len > SIMPLE_TRANSACTION_LIMIT) { 1150f8b69a5fSpeter enderborg pr_err("SELinux: %s: context size (%u) exceeds " 1151744ba35eSEric Paris "payload max\n", __func__, len); 1152b77a493bSEric Paris goto out; 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds memcpy(buf, newcon, len); 11561da177e4SLinus Torvalds length = len; 11571da177e4SLinus Torvalds out: 1158b77a493bSEric Paris kfree(newcon); 1159b77a493bSEric Paris kfree(tcon); 11601da177e4SLinus Torvalds kfree(scon); 11611da177e4SLinus Torvalds return length; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds 11641da177e4SLinus Torvalds static struct inode *sel_make_inode(struct super_block *sb, int mode) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds struct inode *ret = new_inode(sb); 11671da177e4SLinus Torvalds 11681da177e4SLinus Torvalds if (ret) { 11691da177e4SLinus Torvalds ret->i_mode = mode; 1170078cd827SDeepa Dinamani ret->i_atime = ret->i_mtime = ret->i_ctime = current_time(ret); 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds return ret; 11731da177e4SLinus Torvalds } 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds static ssize_t sel_read_bool(struct file *filep, char __user *buf, 11761da177e4SLinus Torvalds size_t count, loff_t *ppos) 11771da177e4SLinus Torvalds { 11780619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 11791da177e4SLinus Torvalds char *page = NULL; 11801da177e4SLinus Torvalds ssize_t length; 11811da177e4SLinus Torvalds ssize_t ret; 11821da177e4SLinus Torvalds int cur_enforcing; 1183496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1184d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 11851da177e4SLinus Torvalds 11860619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 11871da177e4SLinus Torvalds 1188d313f948SStephen Smalley ret = -EINVAL; 11890619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 11900619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1191d313f948SStephen Smalley goto out; 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds ret = -ENOMEM; 1194b77a493bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 1195b77a493bSEric Paris if (!page) 11961da177e4SLinus Torvalds goto out; 11971da177e4SLinus Torvalds 11980619f0f5SStephen Smalley cur_enforcing = security_get_bool_value(fsi->state, index); 11991da177e4SLinus Torvalds if (cur_enforcing < 0) { 12001da177e4SLinus Torvalds ret = cur_enforcing; 12011da177e4SLinus Torvalds goto out; 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds length = scnprintf(page, PAGE_SIZE, "%d %d", cur_enforcing, 12040619f0f5SStephen Smalley fsi->bool_pending_values[index]); 120568bdcf28SStephen Smalley ret = simple_read_from_buffer(buf, count, ppos, page, length); 12061da177e4SLinus Torvalds out: 12070619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12081da177e4SLinus Torvalds free_page((unsigned long)page); 12091da177e4SLinus Torvalds return ret; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds static ssize_t sel_write_bool(struct file *filep, const char __user *buf, 12131da177e4SLinus Torvalds size_t count, loff_t *ppos) 12141da177e4SLinus Torvalds { 12150619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12161da177e4SLinus Torvalds char *page = NULL; 1217d313f948SStephen Smalley ssize_t length; 12181da177e4SLinus Torvalds int new_value; 1219496ad9aaSAl Viro unsigned index = file_inode(filep)->i_ino & SEL_INO_MASK; 1220d313f948SStephen Smalley const char *name = filep->f_path.dentry->d_name.name; 12211da177e4SLinus Torvalds 12220619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12231da177e4SLinus Torvalds 12246b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12256b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1226be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1227be0554c9SStephen Smalley NULL); 12281da177e4SLinus Torvalds if (length) 12291da177e4SLinus Torvalds goto out; 12301da177e4SLinus Torvalds 1231d313f948SStephen Smalley length = -EINVAL; 12320619f0f5SStephen Smalley if (index >= fsi->bool_num || strcmp(name, 12330619f0f5SStephen Smalley fsi->bool_pending_names[index])) 1234d313f948SStephen Smalley goto out; 1235d313f948SStephen Smalley 12361da177e4SLinus Torvalds length = -ENOMEM; 1237b77a493bSEric Paris if (count >= PAGE_SIZE) 12381da177e4SLinus Torvalds goto out; 1239d313f948SStephen Smalley 12401da177e4SLinus Torvalds /* No partial writes. */ 1241d313f948SStephen Smalley length = -EINVAL; 1242b77a493bSEric Paris if (*ppos != 0) 12431da177e4SLinus Torvalds goto out; 1244b77a493bSEric Paris 12458365a719SAl Viro page = memdup_user_nul(buf, count); 12468365a719SAl Viro if (IS_ERR(page)) { 12478365a719SAl Viro length = PTR_ERR(page); 12488365a719SAl Viro page = NULL; 12491da177e4SLinus Torvalds goto out; 12508365a719SAl Viro } 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds length = -EINVAL; 12531da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 12541da177e4SLinus Torvalds goto out; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds if (new_value) 12571da177e4SLinus Torvalds new_value = 1; 12581da177e4SLinus Torvalds 12590619f0f5SStephen Smalley fsi->bool_pending_values[index] = new_value; 12601da177e4SLinus Torvalds length = count; 12611da177e4SLinus Torvalds 12621da177e4SLinus Torvalds out: 12630619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 12648365a719SAl Viro kfree(page); 12651da177e4SLinus Torvalds return length; 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 12689c2e08c5SArjan van de Ven static const struct file_operations sel_bool_ops = { 12691da177e4SLinus Torvalds .read = sel_read_bool, 12701da177e4SLinus Torvalds .write = sel_write_bool, 127157a62c23SArnd Bergmann .llseek = generic_file_llseek, 12721da177e4SLinus Torvalds }; 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds static ssize_t sel_commit_bools_write(struct file *filep, 12751da177e4SLinus Torvalds const char __user *buf, 12761da177e4SLinus Torvalds size_t count, loff_t *ppos) 12771da177e4SLinus Torvalds { 12780619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(filep)->i_sb->s_fs_info; 12791da177e4SLinus Torvalds char *page = NULL; 1280d313f948SStephen Smalley ssize_t length; 12811da177e4SLinus Torvalds int new_value; 12821da177e4SLinus Torvalds 12830619f0f5SStephen Smalley mutex_lock(&fsi->mutex); 12841da177e4SLinus Torvalds 12856b6bc620SStephen Smalley length = avc_has_perm(&selinux_state, 12866b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1287be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETBOOL, 1288be0554c9SStephen Smalley NULL); 12891da177e4SLinus Torvalds if (length) 12901da177e4SLinus Torvalds goto out; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds length = -ENOMEM; 1293b77a493bSEric Paris if (count >= PAGE_SIZE) 12941da177e4SLinus Torvalds goto out; 1295b77a493bSEric Paris 12961da177e4SLinus Torvalds /* No partial writes. */ 1297b77a493bSEric Paris length = -EINVAL; 1298b77a493bSEric Paris if (*ppos != 0) 12991da177e4SLinus Torvalds goto out; 1300b77a493bSEric Paris 13018365a719SAl Viro page = memdup_user_nul(buf, count); 13028365a719SAl Viro if (IS_ERR(page)) { 13038365a719SAl Viro length = PTR_ERR(page); 13048365a719SAl Viro page = NULL; 13051da177e4SLinus Torvalds goto out; 13068365a719SAl Viro } 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds length = -EINVAL; 13091da177e4SLinus Torvalds if (sscanf(page, "%d", &new_value) != 1) 13101da177e4SLinus Torvalds goto out; 13111da177e4SLinus Torvalds 1312b77a493bSEric Paris length = 0; 13130619f0f5SStephen Smalley if (new_value && fsi->bool_pending_values) 13140619f0f5SStephen Smalley length = security_set_bools(fsi->state, fsi->bool_num, 13150619f0f5SStephen Smalley fsi->bool_pending_values); 13161da177e4SLinus Torvalds 1317b77a493bSEric Paris if (!length) 13181da177e4SLinus Torvalds length = count; 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds out: 13210619f0f5SStephen Smalley mutex_unlock(&fsi->mutex); 13228365a719SAl Viro kfree(page); 13231da177e4SLinus Torvalds return length; 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 13269c2e08c5SArjan van de Ven static const struct file_operations sel_commit_bools_ops = { 13271da177e4SLinus Torvalds .write = sel_commit_bools_write, 132857a62c23SArnd Bergmann .llseek = generic_file_llseek, 13291da177e4SLinus Torvalds }; 13301da177e4SLinus Torvalds 13310c92d7c7SChristopher J. PeBenito static void sel_remove_entries(struct dentry *de) 13321da177e4SLinus Torvalds { 1333ad52184bSAl Viro d_genocide(de); 1334ad52184bSAl Viro shrink_dcache_parent(de); 13351da177e4SLinus Torvalds } 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds #define BOOL_DIR_NAME "booleans" 13381da177e4SLinus Torvalds 13390619f0f5SStephen Smalley static int sel_make_bools(struct selinux_fs_info *fsi) 13401da177e4SLinus Torvalds { 1341b77a493bSEric Paris int i, ret; 13421da177e4SLinus Torvalds ssize_t len; 13431da177e4SLinus Torvalds struct dentry *dentry = NULL; 13440619f0f5SStephen Smalley struct dentry *dir = fsi->bool_dir; 13451da177e4SLinus Torvalds struct inode *inode = NULL; 13461da177e4SLinus Torvalds struct inode_security_struct *isec; 13471da177e4SLinus Torvalds char **names = NULL, *page; 13481da177e4SLinus Torvalds int num; 13491da177e4SLinus Torvalds int *values = NULL; 13501da177e4SLinus Torvalds u32 sid; 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds /* remove any existing files */ 13530619f0f5SStephen Smalley for (i = 0; i < fsi->bool_num; i++) 13540619f0f5SStephen Smalley kfree(fsi->bool_pending_names[i]); 13550619f0f5SStephen Smalley kfree(fsi->bool_pending_names); 13560619f0f5SStephen Smalley kfree(fsi->bool_pending_values); 13570619f0f5SStephen Smalley fsi->bool_num = 0; 13580619f0f5SStephen Smalley fsi->bool_pending_names = NULL; 13590619f0f5SStephen Smalley fsi->bool_pending_values = NULL; 13601da177e4SLinus Torvalds 13610c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 13621da177e4SLinus Torvalds 1363b77a493bSEric Paris ret = -ENOMEM; 13641872981bSEric Paris page = (char *)get_zeroed_page(GFP_KERNEL); 13651872981bSEric Paris if (!page) 1366b77a493bSEric Paris goto out; 13671da177e4SLinus Torvalds 13680619f0f5SStephen Smalley ret = security_get_bools(fsi->state, &num, &names, &values); 1369b77a493bSEric Paris if (ret) 13701da177e4SLinus Torvalds goto out; 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds for (i = 0; i < num; i++) { 1373b77a493bSEric Paris ret = -ENOMEM; 13741da177e4SLinus Torvalds dentry = d_alloc_name(dir, names[i]); 1375b77a493bSEric Paris if (!dentry) 1376b77a493bSEric Paris goto out; 13771da177e4SLinus Torvalds 1378b77a493bSEric Paris ret = -ENOMEM; 1379b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG | S_IRUGO | S_IWUSR); 13807e4237faSnixiaoming if (!inode) { 13817e4237faSnixiaoming dput(dentry); 1382b77a493bSEric Paris goto out; 13837e4237faSnixiaoming } 1384b77a493bSEric Paris 13851da177e4SLinus Torvalds ret = -ENAMETOOLONG; 1386cc1dad71SAl Viro len = snprintf(page, PAGE_SIZE, "/%s/%s", BOOL_DIR_NAME, names[i]); 13877e4237faSnixiaoming if (len >= PAGE_SIZE) { 13887e4237faSnixiaoming dput(dentry); 13897e4237faSnixiaoming iput(inode); 1390b77a493bSEric Paris goto out; 13917e4237faSnixiaoming } 1392b77a493bSEric Paris 13931da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 13940619f0f5SStephen Smalley ret = security_genfs_sid(fsi->state, "selinuxfs", page, 1395aa8e712cSStephen Smalley SECCLASS_FILE, &sid); 13964262fb51SGary Tierney if (ret) { 1397900fde06SGary Tierney pr_warn_ratelimited("SELinux: no sid found, defaulting to security isid for %s\n", 1398900fde06SGary Tierney page); 1399900fde06SGary Tierney sid = SECINITSID_SECURITY; 14004262fb51SGary Tierney } 14014262fb51SGary Tierney 14021da177e4SLinus Torvalds isec->sid = sid; 140342059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 14041da177e4SLinus Torvalds inode->i_fop = &sel_bool_ops; 1405bce34bc0SJames Carter inode->i_ino = i|SEL_BOOL_INO_OFFSET; 14061da177e4SLinus Torvalds d_add(dentry, inode); 14071da177e4SLinus Torvalds } 14080619f0f5SStephen Smalley fsi->bool_num = num; 14090619f0f5SStephen Smalley fsi->bool_pending_names = names; 14100619f0f5SStephen Smalley fsi->bool_pending_values = values; 1411b77a493bSEric Paris 1412b77a493bSEric Paris free_page((unsigned long)page); 1413b77a493bSEric Paris return 0; 14141da177e4SLinus Torvalds out: 14151da177e4SLinus Torvalds free_page((unsigned long)page); 1416b77a493bSEric Paris 14171da177e4SLinus Torvalds if (names) { 14189a5f04bfSJesper Juhl for (i = 0; i < num; i++) 14191da177e4SLinus Torvalds kfree(names[i]); 14201da177e4SLinus Torvalds kfree(names); 14211da177e4SLinus Torvalds } 142220c19e41SDavi Arnaut kfree(values); 14230c92d7c7SChristopher J. PeBenito sel_remove_entries(dir); 1424b77a493bSEric Paris 1425b77a493bSEric Paris return ret; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds static ssize_t sel_read_avc_cache_threshold(struct file *filp, char __user *buf, 14291da177e4SLinus Torvalds size_t count, loff_t *ppos) 14301da177e4SLinus Torvalds { 14316b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14326b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14331da177e4SLinus Torvalds char tmpbuf[TMPBUFLEN]; 14341da177e4SLinus Torvalds ssize_t length; 14351da177e4SLinus Torvalds 14366b6bc620SStephen Smalley length = scnprintf(tmpbuf, TMPBUFLEN, "%u", 14376b6bc620SStephen Smalley avc_get_cache_threshold(state->avc)); 14381da177e4SLinus Torvalds return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 14391da177e4SLinus Torvalds } 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds static ssize_t sel_write_avc_cache_threshold(struct file *file, 14421da177e4SLinus Torvalds const char __user *buf, 14431da177e4SLinus Torvalds size_t count, loff_t *ppos) 14441da177e4SLinus Torvalds 14451da177e4SLinus Torvalds { 14466b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 14476b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14488365a719SAl Viro char *page; 14491da177e4SLinus Torvalds ssize_t ret; 1450309c5fadSHeinrich Schuchardt unsigned int new_value; 14511da177e4SLinus Torvalds 14526b6bc620SStephen Smalley ret = avc_has_perm(&selinux_state, 14536b6bc620SStephen Smalley current_sid(), SECINITSID_SECURITY, 1454be0554c9SStephen Smalley SECCLASS_SECURITY, SECURITY__SETSECPARAM, 1455be0554c9SStephen Smalley NULL); 14561da177e4SLinus Torvalds if (ret) 14578365a719SAl Viro return ret; 1458b77a493bSEric Paris 1459b77a493bSEric Paris if (count >= PAGE_SIZE) 14608365a719SAl Viro return -ENOMEM; 1461b77a493bSEric Paris 1462b77a493bSEric Paris /* No partial writes. */ 1463b77a493bSEric Paris if (*ppos != 0) 14648365a719SAl Viro return -EINVAL; 1465b77a493bSEric Paris 14668365a719SAl Viro page = memdup_user_nul(buf, count); 14678365a719SAl Viro if (IS_ERR(page)) 14688365a719SAl Viro return PTR_ERR(page); 1469b77a493bSEric Paris 1470b77a493bSEric Paris ret = -EINVAL; 1471b77a493bSEric Paris if (sscanf(page, "%u", &new_value) != 1) 1472b77a493bSEric Paris goto out; 1473b77a493bSEric Paris 14746b6bc620SStephen Smalley avc_set_cache_threshold(state->avc, new_value); 1475b77a493bSEric Paris 14761da177e4SLinus Torvalds ret = count; 14771da177e4SLinus Torvalds out: 14788365a719SAl Viro kfree(page); 14791da177e4SLinus Torvalds return ret; 14801da177e4SLinus Torvalds } 14811da177e4SLinus Torvalds 14821da177e4SLinus Torvalds static ssize_t sel_read_avc_hash_stats(struct file *filp, char __user *buf, 14831da177e4SLinus Torvalds size_t count, loff_t *ppos) 14841da177e4SLinus Torvalds { 14856b6bc620SStephen Smalley struct selinux_fs_info *fsi = file_inode(filp)->i_sb->s_fs_info; 14866b6bc620SStephen Smalley struct selinux_state *state = fsi->state; 14871da177e4SLinus Torvalds char *page; 1488b77a493bSEric Paris ssize_t length; 14891da177e4SLinus Torvalds 14901da177e4SLinus Torvalds page = (char *)__get_free_page(GFP_KERNEL); 1491b77a493bSEric Paris if (!page) 1492b77a493bSEric Paris return -ENOMEM; 1493b77a493bSEric Paris 14946b6bc620SStephen Smalley length = avc_get_hash_stats(state->avc, page); 1495b77a493bSEric Paris if (length >= 0) 1496b77a493bSEric Paris length = simple_read_from_buffer(buf, count, ppos, page, length); 14971da177e4SLinus Torvalds free_page((unsigned long)page); 1498b77a493bSEric Paris 1499b77a493bSEric Paris return length; 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds 15029c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_threshold_ops = { 15031da177e4SLinus Torvalds .read = sel_read_avc_cache_threshold, 15041da177e4SLinus Torvalds .write = sel_write_avc_cache_threshold, 150557a62c23SArnd Bergmann .llseek = generic_file_llseek, 15061da177e4SLinus Torvalds }; 15071da177e4SLinus Torvalds 15089c2e08c5SArjan van de Ven static const struct file_operations sel_avc_hash_stats_ops = { 15091da177e4SLinus Torvalds .read = sel_read_avc_hash_stats, 151057a62c23SArnd Bergmann .llseek = generic_file_llseek, 15111da177e4SLinus Torvalds }; 15121da177e4SLinus Torvalds 15131da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15141da177e4SLinus Torvalds static struct avc_cache_stats *sel_avc_get_stat_idx(loff_t *idx) 15151da177e4SLinus Torvalds { 15161da177e4SLinus Torvalds int cpu; 15171da177e4SLinus Torvalds 15184f4b6c1aSRusty Russell for (cpu = *idx; cpu < nr_cpu_ids; ++cpu) { 15191da177e4SLinus Torvalds if (!cpu_possible(cpu)) 15201da177e4SLinus Torvalds continue; 15211da177e4SLinus Torvalds *idx = cpu + 1; 15221da177e4SLinus Torvalds return &per_cpu(avc_cache_stats, cpu); 15231da177e4SLinus Torvalds } 15241da177e4SLinus Torvalds return NULL; 15251da177e4SLinus Torvalds } 15261da177e4SLinus Torvalds 15271da177e4SLinus Torvalds static void *sel_avc_stats_seq_start(struct seq_file *seq, loff_t *pos) 15281da177e4SLinus Torvalds { 15291da177e4SLinus Torvalds loff_t n = *pos - 1; 15301da177e4SLinus Torvalds 15311da177e4SLinus Torvalds if (*pos == 0) 15321da177e4SLinus Torvalds return SEQ_START_TOKEN; 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds return sel_avc_get_stat_idx(&n); 15351da177e4SLinus Torvalds } 15361da177e4SLinus Torvalds 15371da177e4SLinus Torvalds static void *sel_avc_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos) 15381da177e4SLinus Torvalds { 15391da177e4SLinus Torvalds return sel_avc_get_stat_idx(pos); 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds 15421da177e4SLinus Torvalds static int sel_avc_stats_seq_show(struct seq_file *seq, void *v) 15431da177e4SLinus Torvalds { 15441da177e4SLinus Torvalds struct avc_cache_stats *st = v; 15451da177e4SLinus Torvalds 1546710a0647SMarkus Elfring if (v == SEQ_START_TOKEN) { 1547710a0647SMarkus Elfring seq_puts(seq, 1548710a0647SMarkus Elfring "lookups hits misses allocations reclaims frees\n"); 1549710a0647SMarkus Elfring } else { 1550257313b2SLinus Torvalds unsigned int lookups = st->lookups; 1551257313b2SLinus Torvalds unsigned int misses = st->misses; 1552257313b2SLinus Torvalds unsigned int hits = lookups - misses; 1553257313b2SLinus Torvalds seq_printf(seq, "%u %u %u %u %u %u\n", lookups, 1554257313b2SLinus Torvalds hits, misses, st->allocations, 15551da177e4SLinus Torvalds st->reclaims, st->frees); 1556257313b2SLinus Torvalds } 15571da177e4SLinus Torvalds return 0; 15581da177e4SLinus Torvalds } 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds static void sel_avc_stats_seq_stop(struct seq_file *seq, void *v) 15611da177e4SLinus Torvalds { } 15621da177e4SLinus Torvalds 15631996a109SJan Engelhardt static const struct seq_operations sel_avc_cache_stats_seq_ops = { 15641da177e4SLinus Torvalds .start = sel_avc_stats_seq_start, 15651da177e4SLinus Torvalds .next = sel_avc_stats_seq_next, 15661da177e4SLinus Torvalds .show = sel_avc_stats_seq_show, 15671da177e4SLinus Torvalds .stop = sel_avc_stats_seq_stop, 15681da177e4SLinus Torvalds }; 15691da177e4SLinus Torvalds 15701da177e4SLinus Torvalds static int sel_open_avc_cache_stats(struct inode *inode, struct file *file) 15711da177e4SLinus Torvalds { 15721da177e4SLinus Torvalds return seq_open(file, &sel_avc_cache_stats_seq_ops); 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds 15759c2e08c5SArjan van de Ven static const struct file_operations sel_avc_cache_stats_ops = { 15761da177e4SLinus Torvalds .open = sel_open_avc_cache_stats, 15771da177e4SLinus Torvalds .read = seq_read, 15781da177e4SLinus Torvalds .llseek = seq_lseek, 15791da177e4SLinus Torvalds .release = seq_release, 15801da177e4SLinus Torvalds }; 15811da177e4SLinus Torvalds #endif 15821da177e4SLinus Torvalds 15831da177e4SLinus Torvalds static int sel_make_avc_files(struct dentry *dir) 15841da177e4SLinus Torvalds { 15850619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 15860619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1587b77a493bSEric Paris int i; 1588cda37124SEric Biggers static const struct tree_descr files[] = { 15891da177e4SLinus Torvalds { "cache_threshold", 15901da177e4SLinus Torvalds &sel_avc_cache_threshold_ops, S_IRUGO|S_IWUSR }, 15911da177e4SLinus Torvalds { "hash_stats", &sel_avc_hash_stats_ops, S_IRUGO }, 15921da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_AVC_STATS 15931da177e4SLinus Torvalds { "cache_stats", &sel_avc_cache_stats_ops, S_IRUGO }, 15941da177e4SLinus Torvalds #endif 15951da177e4SLinus Torvalds }; 15961da177e4SLinus Torvalds 15976e20a64aSNicolas Kaiser for (i = 0; i < ARRAY_SIZE(files); i++) { 15981da177e4SLinus Torvalds struct inode *inode; 15991da177e4SLinus Torvalds struct dentry *dentry; 16001da177e4SLinus Torvalds 16011da177e4SLinus Torvalds dentry = d_alloc_name(dir, files[i].name); 1602b77a493bSEric Paris if (!dentry) 1603b77a493bSEric Paris return -ENOMEM; 16041da177e4SLinus Torvalds 16051da177e4SLinus Torvalds inode = sel_make_inode(dir->d_sb, S_IFREG|files[i].mode); 16067e4237faSnixiaoming if (!inode) { 16077e4237faSnixiaoming dput(dentry); 1608b77a493bSEric Paris return -ENOMEM; 16097e4237faSnixiaoming } 1610b77a493bSEric Paris 16111da177e4SLinus Torvalds inode->i_fop = files[i].ops; 16120619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 16131da177e4SLinus Torvalds d_add(dentry, inode); 16141da177e4SLinus Torvalds } 1615b77a493bSEric Paris 1616b77a493bSEric Paris return 0; 16171da177e4SLinus Torvalds } 16181da177e4SLinus Torvalds 1619f0ee2e46SJames Carter static ssize_t sel_read_initcon(struct file *file, char __user *buf, 1620f0ee2e46SJames Carter size_t count, loff_t *ppos) 1621f0ee2e46SJames Carter { 16220619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 1623f0ee2e46SJames Carter char *con; 1624f0ee2e46SJames Carter u32 sid, len; 1625f0ee2e46SJames Carter ssize_t ret; 1626f0ee2e46SJames Carter 1627496ad9aaSAl Viro sid = file_inode(file)->i_ino&SEL_INO_MASK; 16280619f0f5SStephen Smalley ret = security_sid_to_context(fsi->state, sid, &con, &len); 1629b77a493bSEric Paris if (ret) 1630f0ee2e46SJames Carter return ret; 1631f0ee2e46SJames Carter 1632f0ee2e46SJames Carter ret = simple_read_from_buffer(buf, count, ppos, con, len); 1633f0ee2e46SJames Carter kfree(con); 1634f0ee2e46SJames Carter return ret; 1635f0ee2e46SJames Carter } 1636f0ee2e46SJames Carter 1637f0ee2e46SJames Carter static const struct file_operations sel_initcon_ops = { 1638f0ee2e46SJames Carter .read = sel_read_initcon, 163957a62c23SArnd Bergmann .llseek = generic_file_llseek, 1640f0ee2e46SJames Carter }; 1641f0ee2e46SJames Carter 1642f0ee2e46SJames Carter static int sel_make_initcon_files(struct dentry *dir) 1643f0ee2e46SJames Carter { 1644b77a493bSEric Paris int i; 1645f0ee2e46SJames Carter 1646f0ee2e46SJames Carter for (i = 1; i <= SECINITSID_NUM; i++) { 1647f0ee2e46SJames Carter struct inode *inode; 1648f0ee2e46SJames Carter struct dentry *dentry; 1649f0ee2e46SJames Carter dentry = d_alloc_name(dir, security_get_initial_sid_context(i)); 1650b77a493bSEric Paris if (!dentry) 1651b77a493bSEric Paris return -ENOMEM; 1652f0ee2e46SJames Carter 1653f0ee2e46SJames Carter inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 16547e4237faSnixiaoming if (!inode) { 16557e4237faSnixiaoming dput(dentry); 1656b77a493bSEric Paris return -ENOMEM; 16577e4237faSnixiaoming } 1658b77a493bSEric Paris 1659f0ee2e46SJames Carter inode->i_fop = &sel_initcon_ops; 1660f0ee2e46SJames Carter inode->i_ino = i|SEL_INITCON_INO_OFFSET; 1661f0ee2e46SJames Carter d_add(dentry, inode); 1662f0ee2e46SJames Carter } 1663b77a493bSEric Paris 1664b77a493bSEric Paris return 0; 1665f0ee2e46SJames Carter } 1666f0ee2e46SJames Carter 1667e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_class_to_ino(u16 class) 1668e47c8fc5SChristopher J. PeBenito { 1669e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1)) | SEL_CLASS_INO_OFFSET; 1670e47c8fc5SChristopher J. PeBenito } 1671e47c8fc5SChristopher J. PeBenito 1672e47c8fc5SChristopher J. PeBenito static inline u16 sel_ino_to_class(unsigned long ino) 1673e47c8fc5SChristopher J. PeBenito { 167492ae9e82SEric Paris return (ino & SEL_INO_MASK) / (SEL_VEC_MAX + 1); 1675e47c8fc5SChristopher J. PeBenito } 1676e47c8fc5SChristopher J. PeBenito 1677e47c8fc5SChristopher J. PeBenito static inline unsigned long sel_perm_to_ino(u16 class, u32 perm) 1678e47c8fc5SChristopher J. PeBenito { 1679e47c8fc5SChristopher J. PeBenito return (class * (SEL_VEC_MAX + 1) + perm) | SEL_CLASS_INO_OFFSET; 1680e47c8fc5SChristopher J. PeBenito } 1681e47c8fc5SChristopher J. PeBenito 1682e47c8fc5SChristopher J. PeBenito static inline u32 sel_ino_to_perm(unsigned long ino) 1683e47c8fc5SChristopher J. PeBenito { 1684e47c8fc5SChristopher J. PeBenito return (ino & SEL_INO_MASK) % (SEL_VEC_MAX + 1); 1685e47c8fc5SChristopher J. PeBenito } 1686e47c8fc5SChristopher J. PeBenito 1687e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_class(struct file *file, char __user *buf, 1688e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1689e47c8fc5SChristopher J. PeBenito { 1690496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1691cc1dad71SAl Viro char res[TMPBUFLEN]; 1692cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_class(ino)); 1693cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1694e47c8fc5SChristopher J. PeBenito } 1695e47c8fc5SChristopher J. PeBenito 1696e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_class_ops = { 1697e47c8fc5SChristopher J. PeBenito .read = sel_read_class, 169857a62c23SArnd Bergmann .llseek = generic_file_llseek, 1699e47c8fc5SChristopher J. PeBenito }; 1700e47c8fc5SChristopher J. PeBenito 1701e47c8fc5SChristopher J. PeBenito static ssize_t sel_read_perm(struct file *file, char __user *buf, 1702e47c8fc5SChristopher J. PeBenito size_t count, loff_t *ppos) 1703e47c8fc5SChristopher J. PeBenito { 1704496ad9aaSAl Viro unsigned long ino = file_inode(file)->i_ino; 1705cc1dad71SAl Viro char res[TMPBUFLEN]; 1706cc1dad71SAl Viro ssize_t len = snprintf(res, sizeof(res), "%d", sel_ino_to_perm(ino)); 1707cc1dad71SAl Viro return simple_read_from_buffer(buf, count, ppos, res, len); 1708e47c8fc5SChristopher J. PeBenito } 1709e47c8fc5SChristopher J. PeBenito 1710e47c8fc5SChristopher J. PeBenito static const struct file_operations sel_perm_ops = { 1711e47c8fc5SChristopher J. PeBenito .read = sel_read_perm, 171257a62c23SArnd Bergmann .llseek = generic_file_llseek, 1713e47c8fc5SChristopher J. PeBenito }; 1714e47c8fc5SChristopher J. PeBenito 17153bb56b25SPaul Moore static ssize_t sel_read_policycap(struct file *file, char __user *buf, 17163bb56b25SPaul Moore size_t count, loff_t *ppos) 17173bb56b25SPaul Moore { 17180619f0f5SStephen Smalley struct selinux_fs_info *fsi = file_inode(file)->i_sb->s_fs_info; 17193bb56b25SPaul Moore int value; 17203bb56b25SPaul Moore char tmpbuf[TMPBUFLEN]; 17213bb56b25SPaul Moore ssize_t length; 1722496ad9aaSAl Viro unsigned long i_ino = file_inode(file)->i_ino; 17233bb56b25SPaul Moore 17240619f0f5SStephen Smalley value = security_policycap_supported(fsi->state, i_ino & SEL_INO_MASK); 17253bb56b25SPaul Moore length = scnprintf(tmpbuf, TMPBUFLEN, "%d", value); 17263bb56b25SPaul Moore 17273bb56b25SPaul Moore return simple_read_from_buffer(buf, count, ppos, tmpbuf, length); 17283bb56b25SPaul Moore } 17293bb56b25SPaul Moore 17303bb56b25SPaul Moore static const struct file_operations sel_policycap_ops = { 17313bb56b25SPaul Moore .read = sel_read_policycap, 173257a62c23SArnd Bergmann .llseek = generic_file_llseek, 17333bb56b25SPaul Moore }; 17343bb56b25SPaul Moore 1735e47c8fc5SChristopher J. PeBenito static int sel_make_perm_files(char *objclass, int classvalue, 1736e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1737e47c8fc5SChristopher J. PeBenito { 17380619f0f5SStephen Smalley struct selinux_fs_info *fsi = dir->d_sb->s_fs_info; 1739b77a493bSEric Paris int i, rc, nperms; 1740e47c8fc5SChristopher J. PeBenito char **perms; 1741e47c8fc5SChristopher J. PeBenito 17420619f0f5SStephen Smalley rc = security_get_permissions(fsi->state, objclass, &perms, &nperms); 1743e47c8fc5SChristopher J. PeBenito if (rc) 1744b77a493bSEric Paris return rc; 1745e47c8fc5SChristopher J. PeBenito 1746e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) { 1747e47c8fc5SChristopher J. PeBenito struct inode *inode; 1748e47c8fc5SChristopher J. PeBenito struct dentry *dentry; 1749e47c8fc5SChristopher J. PeBenito 1750b77a493bSEric Paris rc = -ENOMEM; 1751e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, perms[i]); 1752b77a493bSEric Paris if (!dentry) 1753b77a493bSEric Paris goto out; 1754e47c8fc5SChristopher J. PeBenito 1755e47c8fc5SChristopher J. PeBenito rc = -ENOMEM; 1756b77a493bSEric Paris inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 17577e4237faSnixiaoming if (!inode) { 17587e4237faSnixiaoming dput(dentry); 1759b77a493bSEric Paris goto out; 17607e4237faSnixiaoming } 1761b77a493bSEric Paris 1762e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_perm_ops; 1763e47c8fc5SChristopher J. PeBenito /* i+1 since perm values are 1-indexed */ 1764e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_perm_to_ino(classvalue, i + 1); 1765e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1766e47c8fc5SChristopher J. PeBenito } 1767b77a493bSEric Paris rc = 0; 1768b77a493bSEric Paris out: 1769e47c8fc5SChristopher J. PeBenito for (i = 0; i < nperms; i++) 1770e47c8fc5SChristopher J. PeBenito kfree(perms[i]); 1771e47c8fc5SChristopher J. PeBenito kfree(perms); 1772e47c8fc5SChristopher J. PeBenito return rc; 1773e47c8fc5SChristopher J. PeBenito } 1774e47c8fc5SChristopher J. PeBenito 1775e47c8fc5SChristopher J. PeBenito static int sel_make_class_dir_entries(char *classname, int index, 1776e47c8fc5SChristopher J. PeBenito struct dentry *dir) 1777e47c8fc5SChristopher J. PeBenito { 17780619f0f5SStephen Smalley struct super_block *sb = dir->d_sb; 17790619f0f5SStephen Smalley struct selinux_fs_info *fsi = sb->s_fs_info; 1780e47c8fc5SChristopher J. PeBenito struct dentry *dentry = NULL; 1781e47c8fc5SChristopher J. PeBenito struct inode *inode = NULL; 1782e47c8fc5SChristopher J. PeBenito int rc; 1783e47c8fc5SChristopher J. PeBenito 1784e47c8fc5SChristopher J. PeBenito dentry = d_alloc_name(dir, "index"); 1785b77a493bSEric Paris if (!dentry) 1786b77a493bSEric Paris return -ENOMEM; 1787e47c8fc5SChristopher J. PeBenito 1788e47c8fc5SChristopher J. PeBenito inode = sel_make_inode(dir->d_sb, S_IFREG|S_IRUGO); 17897e4237faSnixiaoming if (!inode) { 17907e4237faSnixiaoming dput(dentry); 1791b77a493bSEric Paris return -ENOMEM; 17927e4237faSnixiaoming } 1793e47c8fc5SChristopher J. PeBenito 1794e47c8fc5SChristopher J. PeBenito inode->i_fop = &sel_class_ops; 1795e47c8fc5SChristopher J. PeBenito inode->i_ino = sel_class_to_ino(index); 1796e47c8fc5SChristopher J. PeBenito d_add(dentry, inode); 1797e47c8fc5SChristopher J. PeBenito 17980619f0f5SStephen Smalley dentry = sel_make_dir(dir, "perms", &fsi->last_class_ino); 1799a1c2aa1eSAl Viro if (IS_ERR(dentry)) 1800a1c2aa1eSAl Viro return PTR_ERR(dentry); 1801e47c8fc5SChristopher J. PeBenito 1802e47c8fc5SChristopher J. PeBenito rc = sel_make_perm_files(classname, index, dentry); 1803e47c8fc5SChristopher J. PeBenito 1804e47c8fc5SChristopher J. PeBenito return rc; 1805e47c8fc5SChristopher J. PeBenito } 1806e47c8fc5SChristopher J. PeBenito 18070619f0f5SStephen Smalley static int sel_make_classes(struct selinux_fs_info *fsi) 1808e47c8fc5SChristopher J. PeBenito { 18090619f0f5SStephen Smalley 1810b77a493bSEric Paris int rc, nclasses, i; 1811e47c8fc5SChristopher J. PeBenito char **classes; 1812e47c8fc5SChristopher J. PeBenito 1813e47c8fc5SChristopher J. PeBenito /* delete any existing entries */ 18140619f0f5SStephen Smalley sel_remove_entries(fsi->class_dir); 1815e47c8fc5SChristopher J. PeBenito 18160619f0f5SStephen Smalley rc = security_get_classes(fsi->state, &classes, &nclasses); 1817b77a493bSEric Paris if (rc) 1818b77a493bSEric Paris return rc; 1819e47c8fc5SChristopher J. PeBenito 1820e47c8fc5SChristopher J. PeBenito /* +2 since classes are 1-indexed */ 18210619f0f5SStephen Smalley fsi->last_class_ino = sel_class_to_ino(nclasses + 2); 1822e47c8fc5SChristopher J. PeBenito 1823e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) { 1824e47c8fc5SChristopher J. PeBenito struct dentry *class_name_dir; 1825e47c8fc5SChristopher J. PeBenito 18260619f0f5SStephen Smalley class_name_dir = sel_make_dir(fsi->class_dir, classes[i], 18270619f0f5SStephen Smalley &fsi->last_class_ino); 1828a1c2aa1eSAl Viro if (IS_ERR(class_name_dir)) { 1829a1c2aa1eSAl Viro rc = PTR_ERR(class_name_dir); 1830b77a493bSEric Paris goto out; 1831a1c2aa1eSAl Viro } 1832e47c8fc5SChristopher J. PeBenito 1833e47c8fc5SChristopher J. PeBenito /* i+1 since class values are 1-indexed */ 1834e47c8fc5SChristopher J. PeBenito rc = sel_make_class_dir_entries(classes[i], i + 1, 1835e47c8fc5SChristopher J. PeBenito class_name_dir); 1836e47c8fc5SChristopher J. PeBenito if (rc) 1837b77a493bSEric Paris goto out; 1838e47c8fc5SChristopher J. PeBenito } 1839b77a493bSEric Paris rc = 0; 1840b77a493bSEric Paris out: 1841e47c8fc5SChristopher J. PeBenito for (i = 0; i < nclasses; i++) 1842e47c8fc5SChristopher J. PeBenito kfree(classes[i]); 1843e47c8fc5SChristopher J. PeBenito kfree(classes); 1844e47c8fc5SChristopher J. PeBenito return rc; 1845e47c8fc5SChristopher J. PeBenito } 1846e47c8fc5SChristopher J. PeBenito 18470619f0f5SStephen Smalley static int sel_make_policycap(struct selinux_fs_info *fsi) 18483bb56b25SPaul Moore { 18493bb56b25SPaul Moore unsigned int iter; 18503bb56b25SPaul Moore struct dentry *dentry = NULL; 18513bb56b25SPaul Moore struct inode *inode = NULL; 18523bb56b25SPaul Moore 18530619f0f5SStephen Smalley sel_remove_entries(fsi->policycap_dir); 18543bb56b25SPaul Moore 18553bb56b25SPaul Moore for (iter = 0; iter <= POLICYDB_CAPABILITY_MAX; iter++) { 18564dc2fce3SStephen Smalley if (iter < ARRAY_SIZE(selinux_policycap_names)) 18570619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, 18584dc2fce3SStephen Smalley selinux_policycap_names[iter]); 18593bb56b25SPaul Moore else 18600619f0f5SStephen Smalley dentry = d_alloc_name(fsi->policycap_dir, "unknown"); 18613bb56b25SPaul Moore 18623bb56b25SPaul Moore if (dentry == NULL) 18633bb56b25SPaul Moore return -ENOMEM; 18643bb56b25SPaul Moore 18650619f0f5SStephen Smalley inode = sel_make_inode(fsi->sb, S_IFREG | 0444); 18667e4237faSnixiaoming if (inode == NULL) { 18677e4237faSnixiaoming dput(dentry); 18683bb56b25SPaul Moore return -ENOMEM; 18697e4237faSnixiaoming } 18703bb56b25SPaul Moore 18713bb56b25SPaul Moore inode->i_fop = &sel_policycap_ops; 18723bb56b25SPaul Moore inode->i_ino = iter | SEL_POLICYCAP_INO_OFFSET; 18733bb56b25SPaul Moore d_add(dentry, inode); 18743bb56b25SPaul Moore } 18753bb56b25SPaul Moore 18763bb56b25SPaul Moore return 0; 18773bb56b25SPaul Moore } 18783bb56b25SPaul Moore 1879a1c2aa1eSAl Viro static struct dentry *sel_make_dir(struct dentry *dir, const char *name, 18800dd4ae51SChristopher J. PeBenito unsigned long *ino) 18811da177e4SLinus Torvalds { 1882a1c2aa1eSAl Viro struct dentry *dentry = d_alloc_name(dir, name); 18831da177e4SLinus Torvalds struct inode *inode; 18841da177e4SLinus Torvalds 1885a1c2aa1eSAl Viro if (!dentry) 1886a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1887a1c2aa1eSAl Viro 1888a1c2aa1eSAl Viro inode = sel_make_inode(dir->d_sb, S_IFDIR | S_IRUGO | S_IXUGO); 1889a1c2aa1eSAl Viro if (!inode) { 1890a1c2aa1eSAl Viro dput(dentry); 1891a1c2aa1eSAl Viro return ERR_PTR(-ENOMEM); 1892a1c2aa1eSAl Viro } 1893b77a493bSEric Paris 18941da177e4SLinus Torvalds inode->i_op = &simple_dir_inode_operations; 18951da177e4SLinus Torvalds inode->i_fop = &simple_dir_operations; 18960dd4ae51SChristopher J. PeBenito inode->i_ino = ++(*ino); 189740e906f8SJames Morris /* directory inodes start off with i_nlink == 2 (for "." entry) */ 1898d8c76e6fSDave Hansen inc_nlink(inode); 18991da177e4SLinus Torvalds d_add(dentry, inode); 1900edb20fb5SJames Morris /* bump link count on parent directory, too */ 1901ce0b16ddSDavid Howells inc_nlink(d_inode(dir)); 1902b77a493bSEric Paris 1903a1c2aa1eSAl Viro return dentry; 19041da177e4SLinus Torvalds } 19051da177e4SLinus Torvalds 19060619f0f5SStephen Smalley #define NULL_FILE_NAME "null" 19070619f0f5SStephen Smalley 19081da177e4SLinus Torvalds static int sel_fill_super(struct super_block *sb, void *data, int silent) 19091da177e4SLinus Torvalds { 19100619f0f5SStephen Smalley struct selinux_fs_info *fsi; 19111da177e4SLinus Torvalds int ret; 19121da177e4SLinus Torvalds struct dentry *dentry; 1913a1c2aa1eSAl Viro struct inode *inode; 19141da177e4SLinus Torvalds struct inode_security_struct *isec; 19151da177e4SLinus Torvalds 1916cda37124SEric Biggers static const struct tree_descr selinux_files[] = { 19171da177e4SLinus Torvalds [SEL_LOAD] = {"load", &sel_load_ops, S_IRUSR|S_IWUSR}, 19181da177e4SLinus Torvalds [SEL_ENFORCE] = {"enforce", &sel_enforce_ops, S_IRUGO|S_IWUSR}, 1919ce9982d0SStephen Smalley [SEL_CONTEXT] = {"context", &transaction_ops, S_IRUGO|S_IWUGO}, 19201da177e4SLinus Torvalds [SEL_ACCESS] = {"access", &transaction_ops, S_IRUGO|S_IWUGO}, 19211da177e4SLinus Torvalds [SEL_CREATE] = {"create", &transaction_ops, S_IRUGO|S_IWUGO}, 19221da177e4SLinus Torvalds [SEL_RELABEL] = {"relabel", &transaction_ops, S_IRUGO|S_IWUGO}, 19231da177e4SLinus Torvalds [SEL_USER] = {"user", &transaction_ops, S_IRUGO|S_IWUGO}, 19241da177e4SLinus Torvalds [SEL_POLICYVERS] = {"policyvers", &sel_policyvers_ops, S_IRUGO}, 19251da177e4SLinus Torvalds [SEL_COMMIT_BOOLS] = {"commit_pending_bools", &sel_commit_bools_ops, S_IWUSR}, 19261da177e4SLinus Torvalds [SEL_MLS] = {"mls", &sel_mls_ops, S_IRUGO}, 19271da177e4SLinus Torvalds [SEL_DISABLE] = {"disable", &sel_disable_ops, S_IWUSR}, 19281da177e4SLinus Torvalds [SEL_MEMBER] = {"member", &transaction_ops, S_IRUGO|S_IWUGO}, 19291da177e4SLinus Torvalds [SEL_CHECKREQPROT] = {"checkreqprot", &sel_checkreqprot_ops, S_IRUGO|S_IWUSR}, 19303f12070eSEric Paris [SEL_REJECT_UNKNOWN] = {"reject_unknown", &sel_handle_unknown_ops, S_IRUGO}, 19313f12070eSEric Paris [SEL_DENY_UNKNOWN] = {"deny_unknown", &sel_handle_unknown_ops, S_IRUGO}, 193211904167SKaiGai Kohei [SEL_STATUS] = {"status", &sel_handle_status_ops, S_IRUGO}, 193372e8c859SEric Paris [SEL_POLICY] = {"policy", &sel_policy_ops, S_IRUGO}, 1934f9df6458SAndrew Perepechko [SEL_VALIDATE_TRANS] = {"validatetrans", &sel_transition_ops, 1935f9df6458SAndrew Perepechko S_IWUGO}, 19361da177e4SLinus Torvalds /* last one */ {""} 19371da177e4SLinus Torvalds }; 19380619f0f5SStephen Smalley 19390619f0f5SStephen Smalley ret = selinux_fs_info_create(sb); 19400619f0f5SStephen Smalley if (ret) 19410619f0f5SStephen Smalley goto err; 19420619f0f5SStephen Smalley 19431da177e4SLinus Torvalds ret = simple_fill_super(sb, SELINUX_MAGIC, selinux_files); 19441da177e4SLinus Torvalds if (ret) 1945161ce45aSJames Morris goto err; 19461da177e4SLinus Torvalds 19470619f0f5SStephen Smalley fsi = sb->s_fs_info; 19480619f0f5SStephen Smalley fsi->bool_dir = sel_make_dir(sb->s_root, BOOL_DIR_NAME, &fsi->last_ino); 19490619f0f5SStephen Smalley if (IS_ERR(fsi->bool_dir)) { 19500619f0f5SStephen Smalley ret = PTR_ERR(fsi->bool_dir); 19510619f0f5SStephen Smalley fsi->bool_dir = NULL; 1952161ce45aSJames Morris goto err; 1953a1c2aa1eSAl Viro } 19541da177e4SLinus Torvalds 1955b77a493bSEric Paris ret = -ENOMEM; 19561da177e4SLinus Torvalds dentry = d_alloc_name(sb->s_root, NULL_FILE_NAME); 1957b77a493bSEric Paris if (!dentry) 1958161ce45aSJames Morris goto err; 19591da177e4SLinus Torvalds 1960161ce45aSJames Morris ret = -ENOMEM; 1961b77a493bSEric Paris inode = sel_make_inode(sb, S_IFCHR | S_IRUGO | S_IWUGO); 19627e4237faSnixiaoming if (!inode) { 19637e4237faSnixiaoming dput(dentry); 1964161ce45aSJames Morris goto err; 19657e4237faSnixiaoming } 1966b77a493bSEric Paris 19670619f0f5SStephen Smalley inode->i_ino = ++fsi->last_ino; 19681da177e4SLinus Torvalds isec = (struct inode_security_struct *)inode->i_security; 19691da177e4SLinus Torvalds isec->sid = SECINITSID_DEVNULL; 19701da177e4SLinus Torvalds isec->sclass = SECCLASS_CHR_FILE; 197142059112SAndreas Gruenbacher isec->initialized = LABEL_INITIALIZED; 19721da177e4SLinus Torvalds 19731da177e4SLinus Torvalds init_special_inode(inode, S_IFCHR | S_IRUGO | S_IWUGO, MKDEV(MEM_MAJOR, 3)); 19741da177e4SLinus Torvalds d_add(dentry, inode); 19751da177e4SLinus Torvalds 19760619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "avc", &fsi->last_ino); 1977a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1978a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1979161ce45aSJames Morris goto err; 1980a1c2aa1eSAl Viro } 19811da177e4SLinus Torvalds 19821da177e4SLinus Torvalds ret = sel_make_avc_files(dentry); 19831da177e4SLinus Torvalds if (ret) 1984161ce45aSJames Morris goto err; 1985f0ee2e46SJames Carter 19860619f0f5SStephen Smalley dentry = sel_make_dir(sb->s_root, "initial_contexts", &fsi->last_ino); 1987a1c2aa1eSAl Viro if (IS_ERR(dentry)) { 1988a1c2aa1eSAl Viro ret = PTR_ERR(dentry); 1989f0ee2e46SJames Carter goto err; 1990a1c2aa1eSAl Viro } 1991f0ee2e46SJames Carter 1992f0ee2e46SJames Carter ret = sel_make_initcon_files(dentry); 1993f0ee2e46SJames Carter if (ret) 1994f0ee2e46SJames Carter goto err; 1995f0ee2e46SJames Carter 19960619f0f5SStephen Smalley fsi->class_dir = sel_make_dir(sb->s_root, "class", &fsi->last_ino); 19970619f0f5SStephen Smalley if (IS_ERR(fsi->class_dir)) { 19980619f0f5SStephen Smalley ret = PTR_ERR(fsi->class_dir); 19990619f0f5SStephen Smalley fsi->class_dir = NULL; 2000e47c8fc5SChristopher J. PeBenito goto err; 2001a1c2aa1eSAl Viro } 2002e47c8fc5SChristopher J. PeBenito 20030619f0f5SStephen Smalley fsi->policycap_dir = sel_make_dir(sb->s_root, "policy_capabilities", 20040619f0f5SStephen Smalley &fsi->last_ino); 20050619f0f5SStephen Smalley if (IS_ERR(fsi->policycap_dir)) { 20060619f0f5SStephen Smalley ret = PTR_ERR(fsi->policycap_dir); 20070619f0f5SStephen Smalley fsi->policycap_dir = NULL; 2008e47c8fc5SChristopher J. PeBenito goto err; 2009a1c2aa1eSAl Viro } 20100619f0f5SStephen Smalley 20110619f0f5SStephen Smalley ret = sel_make_policy_nodes(fsi); 20120619f0f5SStephen Smalley if (ret) 20130619f0f5SStephen Smalley goto err; 2014b77a493bSEric Paris return 0; 2015161ce45aSJames Morris err: 2016f8b69a5fSpeter enderborg pr_err("SELinux: %s: failed while creating inodes\n", 2017744ba35eSEric Paris __func__); 20180619f0f5SStephen Smalley 20190619f0f5SStephen Smalley selinux_fs_info_free(sb); 20200619f0f5SStephen Smalley 2021b77a493bSEric Paris return ret; 20221da177e4SLinus Torvalds } 20231da177e4SLinus Torvalds 2024fc14f2feSAl Viro static struct dentry *sel_mount(struct file_system_type *fs_type, 2025fc14f2feSAl Viro int flags, const char *dev_name, void *data) 20261da177e4SLinus Torvalds { 2027fc14f2feSAl Viro return mount_single(fs_type, flags, data, sel_fill_super); 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds 20300619f0f5SStephen Smalley static void sel_kill_sb(struct super_block *sb) 20310619f0f5SStephen Smalley { 20320619f0f5SStephen Smalley selinux_fs_info_free(sb); 20330619f0f5SStephen Smalley kill_litter_super(sb); 20340619f0f5SStephen Smalley } 20350619f0f5SStephen Smalley 20361da177e4SLinus Torvalds static struct file_system_type sel_fs_type = { 20371da177e4SLinus Torvalds .name = "selinuxfs", 2038fc14f2feSAl Viro .mount = sel_mount, 20390619f0f5SStephen Smalley .kill_sb = sel_kill_sb, 20401da177e4SLinus Torvalds }; 20411da177e4SLinus Torvalds 20421da177e4SLinus Torvalds struct vfsmount *selinuxfs_mount; 20430619f0f5SStephen Smalley struct path selinux_null; 20441da177e4SLinus Torvalds 20451da177e4SLinus Torvalds static int __init init_sel_fs(void) 20461da177e4SLinus Torvalds { 20470619f0f5SStephen Smalley struct qstr null_name = QSTR_INIT(NULL_FILE_NAME, 20480619f0f5SStephen Smalley sizeof(NULL_FILE_NAME)-1); 20491da177e4SLinus Torvalds int err; 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds if (!selinux_enabled) 20521da177e4SLinus Torvalds return 0; 20537a627e3bSGreg Kroah-Hartman 2054f9bb4882SEric W. Biederman err = sysfs_create_mount_point(fs_kobj, "selinux"); 2055f9bb4882SEric W. Biederman if (err) 2056f9bb4882SEric W. Biederman return err; 20577a627e3bSGreg Kroah-Hartman 20581da177e4SLinus Torvalds err = register_filesystem(&sel_fs_type); 20597a627e3bSGreg Kroah-Hartman if (err) { 2060f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2061b77a493bSEric Paris return err; 20627a627e3bSGreg Kroah-Hartman } 2063b77a493bSEric Paris 2064765927b2SAl Viro selinux_null.mnt = selinuxfs_mount = kern_mount(&sel_fs_type); 20651da177e4SLinus Torvalds if (IS_ERR(selinuxfs_mount)) { 2066f8b69a5fSpeter enderborg pr_err("selinuxfs: could not mount!\n"); 20671da177e4SLinus Torvalds err = PTR_ERR(selinuxfs_mount); 20681da177e4SLinus Torvalds selinuxfs_mount = NULL; 20691da177e4SLinus Torvalds } 20700619f0f5SStephen Smalley selinux_null.dentry = d_hash_and_lookup(selinux_null.mnt->mnt_root, 20710619f0f5SStephen Smalley &null_name); 20720619f0f5SStephen Smalley if (IS_ERR(selinux_null.dentry)) { 20730619f0f5SStephen Smalley pr_err("selinuxfs: could not lookup null!\n"); 20740619f0f5SStephen Smalley err = PTR_ERR(selinux_null.dentry); 20750619f0f5SStephen Smalley selinux_null.dentry = NULL; 20760619f0f5SStephen Smalley } 2077b77a493bSEric Paris 20781da177e4SLinus Torvalds return err; 20791da177e4SLinus Torvalds } 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds __initcall(init_sel_fs); 20821da177e4SLinus Torvalds 20831da177e4SLinus Torvalds #ifdef CONFIG_SECURITY_SELINUX_DISABLE 20841da177e4SLinus Torvalds void exit_sel_fs(void) 20851da177e4SLinus Torvalds { 2086f9bb4882SEric W. Biederman sysfs_remove_mount_point(fs_kobj, "selinux"); 2087fd40ffc7SStephen Smalley dput(selinux_null.dentry); 2088423e0ab0STim Chen kern_unmount(selinuxfs_mount); 20891da177e4SLinus Torvalds unregister_filesystem(&sel_fs_type); 20901da177e4SLinus Torvalds } 20911da177e4SLinus Torvalds #endif 2092