/* * Security plug functions * * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/capability.h>#include <linux/module.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/security.h>#include <linux/integrity.h>#include <linux/ima.h>#include <linux/evm.h> #define MAX_LSM_EVM_XATTR 2 /* Boot-time LSM user choice */static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = CONFIG_DEFAULT_SECURITY; static struct security_operations *security_ops;static struct security_operations default_security_ops = { .name = "default",}; static inline int __init verify(struct security_operations *ops){ /* verify the security_operations structure exists */ if (!ops) return -EINVAL; security_fixup_ops(ops); return 0;} static void __init do_security_initcalls(void){ initcall_t *call; call = __security_initcall_start; while (call < __security_initcall_end) { (*call) (); call++; }} /** * security_init - initializes the security framework * * This should be called early in the kernel initialization sequence. */int __init security_init(void){ printk(KERN_INFO "Security Framework initialized\n"); security_fixup_ops(&default_security_ops); security_ops = &default_security_ops; do_security_initcalls(); return 0;} void reset_security_ops(void){ security_ops = &default_security_ops;} /* Save user chosen LSM */static int __init choose_lsm(char *str){ strncpy(chosen_lsm, str, SECURITY_NAME_MAX); return 1;}__setup("security=", choose_lsm); /** * security_module_enable - Load given security module on boot ? * @ops: a pointer to the struct security_operations that is to be checked. * * Each LSM must pass this method before registering its own operations * to avoid security registration races. This method may also be used * to check if your LSM is currently loaded during kernel initialization. * * Return true if: * -The passed LSM is the one chosen by user at boot time, * -or the passed LSM is configured as the default and the user did not * choose an alternate LSM at boot time. * Otherwise, return false. */int __init security_module_enable(struct security_operations *ops){ return !strcmp(ops->name, chosen_lsm);} /** * register_security - registers a security framework with the kernel * @ops: a pointer to the struct security_options that is to be registered * * This function allows a security module to register itself with the * kernel security subsystem. Some rudimentary checking is done on the @ops * value passed to this function. You'll need to check first if your LSM * is allowed to register its @ops by calling security_module_enable(@ops). * * If there is already a security module registered with the kernel, * an error will be returned. Otherwise %0 is returned on success. */int __init register_security(struct security_operations *ops){ if (verify(ops)) { printk(KERN_DEBUG "%s could not verify " "security_operations structure.\n", __func__); return -EINVAL; } if (security_ops != &default_security_ops) return -EAGAIN; security_ops = ops; return 0;} /* Security operations */ int security_ptrace_access_check(struct task_struct *child, unsigned int mode){ return security_ops->ptrace_access_check(child, mode);} int security_ptrace_traceme(struct task_struct *parent){ return security_ops->ptrace_traceme(parent);} int security_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted){ return security_ops->capget(target, effective, inheritable, permitted);} int security_capset(struct cred *new, const struct cred *old, const kernel_cap_t *effective, const kernel_cap_t *inheritable, const kernel_cap_t *permitted){ return security_ops->capset(new, old, effective, inheritable, permitted);} int security_capable(struct user_namespace *ns, const struct cred *cred, int cap){ return security_ops->capable(current, cred, ns, cap, SECURITY_CAP_AUDIT);} int security_real_capable(struct task_struct *tsk, struct user_namespace *ns, int cap){ const struct cred *cred; int ret; cred = get_task_cred(tsk); ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_AUDIT); put_cred(cred); return ret;} int security_real_capable_noaudit(struct task_struct *tsk, struct user_namespace *ns, int cap){ const struct cred *cred; int ret; cred = get_task_cred(tsk); ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_NOAUDIT); put_cred(cred); return ret;} int security_quotactl(int cmds, int type, int id, struct super_block *sb){ return security_ops->quotactl(cmds, type, id, sb);} int security_quota_on(struct dentry *dentry){ return security_ops->quota_on(dentry);} int security_syslog(int type){ return security_ops->syslog(type);} int security_settime(const struct timespec *ts, const struct timezone *tz){ return security_ops->settime(ts, tz);} int security_vm_enough_memory(long pages){ WARN_ON(current->mm == NULL); return security_ops->vm_enough_memory(current->mm, pages);} int security_vm_enough_memory_mm(struct mm_struct *mm, long pages){ WARN_ON(mm == NULL); return security_ops->vm_enough_memory(mm, pages);} int security_vm_enough_memory_kern(long pages){ /* If current->mm is a kernel thread then we will pass NULL, for this specific case that is fine */ return security_ops->vm_enough_memory(current->mm, pages);} int security_bprm_set_creds(struct linux_binprm *bprm){ return security_ops->bprm_set_creds(bprm);} int security_bprm_check(struct linux_binprm *bprm){ int ret; ret = security_ops->bprm_check_security(bprm); if (ret) return ret; return ima_bprm_check(bprm);} void security_bprm_committing_creds(struct linux_binprm *bprm){ security_ops->bprm_committing_creds(bprm);} void security_bprm_committed_creds(struct linux_binprm *bprm){ security_ops->bprm_committed_creds(bprm);} int security_bprm_secureexec(struct linux_binprm *bprm){ return security_ops->bprm_secureexec(bprm);} int security_sb_alloc(struct super_block *sb){ return security_ops->sb_alloc_security(sb);} void security_sb_free(struct super_block *sb){ security_ops->sb_free_security(sb);} int security_sb_copy_data(char *orig, char *copy){ return security_ops->sb_copy_data(orig, copy);}EXPORT_SYMBOL(security_sb_copy_data); int security_sb_remount(struct super_block *sb, void *data){ return security_ops->sb_remount(sb, data);} int security_sb_kern_mount(struct super_block *sb, int flags, void *data){ return security_ops->sb_kern_mount(sb, flags, data);} int security_sb_show_options(struct seq_file *m, struct super_block *sb){ return security_ops->sb_show_options(m, sb);} int security_sb_statfs(struct dentry *dentry){ return security_ops->sb_statfs(dentry);} int security_sb_mount(char *dev_name, struct path *path, char *type, unsigned long flags, void *data){ return security_ops->sb_mount(dev_name, path, type, flags, data);} int security_sb_umount(struct vfsmount *mnt, int flags){ return security_ops->sb_umount(mnt, flags);} int security_sb_pivotroot(struct path *old_path, struct path *new_path){ return security_ops->sb_pivotroot(old_path, new_path);} int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts){ return security_ops->sb_set_mnt_opts(sb, opts);}EXPORT_SYMBOL(security_sb_set_mnt_opts); void security_sb_clone_mnt_opts(const struct super_block *oldsb, struct super_block *newsb){ security_ops->sb_clone_mnt_opts(oldsb, newsb);}EXPORT_SYMBOL(security_sb_clone_mnt_opts); int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts){ return security_ops->sb_parse_opts_str(options, opts);}EXPORT_SYMBOL(security_sb_parse_opts_str); int security_inode_alloc(struct inode *inode){ inode->i_security = NULL; return security_ops->inode_alloc_security(inode);} void security_inode_free(struct inode *inode){ integrity_inode_free(inode); security_ops->inode_free_security(inode);} int security_inode_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr, const initxattrs initxattrs, void *fs_data){ struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; struct xattr *lsm_xattr, *evm_xattr, *xattr; int ret; if (unlikely(IS_PRIVATE(inode))) return 0; memset(new_xattrs, 0, sizeof new_xattrs); if (!initxattrs) return security_ops->inode_init_security(inode, dir, qstr, NULL, NULL, NULL); lsm_xattr = new_xattrs; ret = security_ops->inode_init_security(inode, dir, qstr, &lsm_xattr->name, &lsm_xattr->value, &lsm_xattr->value_len); if (ret) goto out; evm_xattr = lsm_xattr + 1; ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); if (ret) goto out; ret = initxattrs(inode, new_xattrs, fs_data);out: for (xattr = new_xattrs; xattr->name != NULL; xattr++) { kfree(xattr->name); kfree(xattr->value); } return (ret == -EOPNOTSUPP) ? 0 : ret;}EXPORT_SYMBOL(security_inode_init_security); int security_old_inode_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr, char **name, void **value, size_t *len){ if (unlikely(IS_PRIVATE(inode))) return -EOPNOTSUPP; return security_ops->inode_init_security(inode, dir, qstr, name, value, len);}EXPORT_SYMBOL(security_old_inode_init_security); #ifdef CONFIG_SECURITY_PATHint security_path_mknod(struct path *dir, struct dentry *dentry, int mode, unsigned int dev){ if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_mknod(dir, dentry, mode, dev);}EXPORT_SYMBOL(security_path_mknod); int security_path_mkdir(struct path *dir, struct dentry *dentry, int mode){ if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_mkdir(dir, dentry, mode);}EXPORT_SYMBOL(security_path_mkdir); int security_path_rmdir(struct path *dir, struct dentry *dentry){ if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_rmdir(dir, dentry);} int security_path_unlink(struct path *dir, struct dentry *dentry){ if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_unlink(dir, dentry);}EXPORT_SYMBOL(security_path_unlink); int security_path_symlink(struct path *dir, struct dentry *dentry, const char *old_name){ if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_symlink(dir, dentry, old_name);} int security_path_link(struct dentry *old_dentry, struct path *new_dir, struct dentry *new_dentry){ if (unlikely(IS_PRIVATE(old_dentry->d_inode))) return 0; return security_ops->path_link(old_dentry, new_dir, new_dentry);} int security_path_rename(struct path *old_dir, struct dentry *old_dentry, struct path *new_dir, struct dentry *new_dentry){ if (unlikely(IS_PRIVATE(old_dentry->d_inode) || (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode)))) return 0; return security_ops->path_rename(old_dir, old_dentry, new_dir, new_dentry);}EXPORT_SYMBOL(security_path_rename); int security_path_truncate(struct path *path){ if (unlikely(IS_PRIVATE(path->dentry->d_inode))) return 0; return security_ops->path_truncate(path);} int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt, mode_t mode){ if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; return security_ops->path_chmod(dentry, mnt, mode);} int security_path_chown(struct path *path, uid_t uid, gid_t gid){ if (unlikely(IS_PRIVATE(path->dentry->d_inode))) return 0; return security_ops->path_chown(path, uid, gid);} int security_path_chroot(struct path *path){ return security_ops->path_chroot(path);}#endif int security_inode_create(struct inode *dir, struct dentry *dentry, int mode){ if (unlikely(IS_PRIVATE(dir))) return 0; return security_ops->inode_create(dir, dentry, mode);}EXPORT_SYMBOL_GPL(security_inode_create); int security_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry){ if (unlikely(IS_PRIVATE(old_dentry->d_inode))) return 0; return security_ops->inode_link(old_dentry, dir, new_dentry);} int security_inode_unlink(struct inode *dir, struct dentry *dentry){ if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; return security_ops->inode_unlink(dir, dentry);} Lines 1–500 of 1361. 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/* * Security plug functions * * Copyright (C) 2001 WireX Communications, Inc <chris@wirex.com> * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> * Copyright (C) 2001 Networks Associates Technology, Inc <ssmalley@nai.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ #include <linux/capability.h> #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/security.h> #include <linux/integrity.h> #include <linux/ima.h> #include <linux/evm.h> #define MAX_LSM_EVM_XATTR 2 /* Boot-time LSM user choice */ static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1] = CONFIG_DEFAULT_SECURITY; static struct security_operations *security_ops; static struct security_operations default_security_ops = { .name = "default", }; static inline int __init verify(struct security_operations *ops) { /* verify the security_operations structure exists */ if (!ops) return -EINVAL; security_fixup_ops(ops); return 0; } static void __init do_security_initcalls(void) { initcall_t *call; call = __security_initcall_start; while (call < __security_initcall_end) { (*call) (); call++; } } /** * security_init - initializes the security framework * * This should be called early in the kernel initialization sequence. */ int __init security_init(void) { printk(KERN_INFO "Security Framework initialized\n"); security_fixup_ops(&default_security_ops); security_ops = &default_security_ops; do_security_initcalls(); return 0; } void reset_security_ops(void) { security_ops = &default_security_ops; } /* Save user chosen LSM */ static int __init choose_lsm(char *str) { strncpy(chosen_lsm, str, SECURITY_NAME_MAX); return 1; } __setup("security=", choose_lsm); /** * security_module_enable - Load given security module on boot ? * @ops: a pointer to the struct security_operations that is to be checked. * * Each LSM must pass this method before registering its own operations * to avoid security registration races. This method may also be used * to check if your LSM is currently loaded during kernel initialization. * * Return true if: * -The passed LSM is the one chosen by user at boot time, * -or the passed LSM is configured as the default and the user did not * choose an alternate LSM at boot time. * Otherwise, return false. */ int __init security_module_enable(struct security_operations *ops) { return !strcmp(ops->name, chosen_lsm); } /** * register_security - registers a security framework with the kernel * @ops: a pointer to the struct security_options that is to be registered * * This function allows a security module to register itself with the * kernel security subsystem. Some rudimentary checking is done on the @ops * value passed to this function. You'll need to check first if your LSM * is allowed to register its @ops by calling security_module_enable(@ops). * * If there is already a security module registered with the kernel, * an error will be returned. Otherwise %0 is returned on success. */ int __init register_security(struct security_operations *ops) { if (verify(ops)) { printk(KERN_DEBUG "%s could not verify " "security_operations structure.\n", __func__); return -EINVAL; } if (security_ops != &default_security_ops) return -EAGAIN; security_ops = ops; return 0; } /* Security operations */ int security_ptrace_access_check(struct task_struct *child, unsigned int mode) { return security_ops->ptrace_access_check(child, mode); } int security_ptrace_traceme(struct task_struct *parent) { return security_ops->ptrace_traceme(parent); } int security_capget(struct task_struct *target, kernel_cap_t *effective, kernel_cap_t *inheritable, kernel_cap_t *permitted) { return security_ops->capget(target, effective, inheritable, permitted); } int security_capset(struct cred *new, const struct cred *old, const kernel_cap_t *effective, const kernel_cap_t *inheritable, const kernel_cap_t *permitted) { return security_ops->capset(new, old, effective, inheritable, permitted); } int security_capable(struct user_namespace *ns, const struct cred *cred, int cap) { return security_ops->capable(current, cred, ns, cap, SECURITY_CAP_AUDIT); } int security_real_capable(struct task_struct *tsk, struct user_namespace *ns, int cap) { const struct cred *cred; int ret; cred = get_task_cred(tsk); ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_AUDIT); put_cred(cred); return ret; } int security_real_capable_noaudit(struct task_struct *tsk, struct user_namespace *ns, int cap) { const struct cred *cred; int ret; cred = get_task_cred(tsk); ret = security_ops->capable(tsk, cred, ns, cap, SECURITY_CAP_NOAUDIT); put_cred(cred); return ret; } int security_quotactl(int cmds, int type, int id, struct super_block *sb) { return security_ops->quotactl(cmds, type, id, sb); } int security_quota_on(struct dentry *dentry) { return security_ops->quota_on(dentry); } int security_syslog(int type) { return security_ops->syslog(type); } int security_settime(const struct timespec *ts, const struct timezone *tz) { return security_ops->settime(ts, tz); } int security_vm_enough_memory(long pages) { WARN_ON(current->mm == NULL); return security_ops->vm_enough_memory(current->mm, pages); } int security_vm_enough_memory_mm(struct mm_struct *mm, long pages) { WARN_ON(mm == NULL); return security_ops->vm_enough_memory(mm, pages); } int security_vm_enough_memory_kern(long pages) { /* If current->mm is a kernel thread then we will pass NULL, for this specific case that is fine */ return security_ops->vm_enough_memory(current->mm, pages); } int security_bprm_set_creds(struct linux_binprm *bprm) { return security_ops->bprm_set_creds(bprm); } int security_bprm_check(struct linux_binprm *bprm) { int ret; ret = security_ops->bprm_check_security(bprm); if (ret) return ret; return ima_bprm_check(bprm); } void security_bprm_committing_creds(struct linux_binprm *bprm) { security_ops->bprm_committing_creds(bprm); } void security_bprm_committed_creds(struct linux_binprm *bprm) { security_ops->bprm_committed_creds(bprm); } int security_bprm_secureexec(struct linux_binprm *bprm) { return security_ops->bprm_secureexec(bprm); } int security_sb_alloc(struct super_block *sb) { return security_ops->sb_alloc_security(sb); } void security_sb_free(struct super_block *sb) { security_ops->sb_free_security(sb); } int security_sb_copy_data(char *orig, char *copy) { return security_ops->sb_copy_data(orig, copy); } EXPORT_SYMBOL(security_sb_copy_data); int security_sb_remount(struct super_block *sb, void *data) { return security_ops->sb_remount(sb, data); } int security_sb_kern_mount(struct super_block *sb, int flags, void *data) { return security_ops->sb_kern_mount(sb, flags, data); } int security_sb_show_options(struct seq_file *m, struct super_block *sb) { return security_ops->sb_show_options(m, sb); } int security_sb_statfs(struct dentry *dentry) { return security_ops->sb_statfs(dentry); } int security_sb_mount(char *dev_name, struct path *path, char *type, unsigned long flags, void *data) { return security_ops->sb_mount(dev_name, path, type, flags, data); } int security_sb_umount(struct vfsmount *mnt, int flags) { return security_ops->sb_umount(mnt, flags); } int security_sb_pivotroot(struct path *old_path, struct path *new_path) { return security_ops->sb_pivotroot(old_path, new_path); } int security_sb_set_mnt_opts(struct super_block *sb, struct security_mnt_opts *opts) { return security_ops->sb_set_mnt_opts(sb, opts); } EXPORT_SYMBOL(security_sb_set_mnt_opts); void security_sb_clone_mnt_opts(const struct super_block *oldsb, struct super_block *newsb) { security_ops->sb_clone_mnt_opts(oldsb, newsb); } EXPORT_SYMBOL(security_sb_clone_mnt_opts); int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts) { return security_ops->sb_parse_opts_str(options, opts); } EXPORT_SYMBOL(security_sb_parse_opts_str); int security_inode_alloc(struct inode *inode) { inode->i_security = NULL; return security_ops->inode_alloc_security(inode); } void security_inode_free(struct inode *inode) { integrity_inode_free(inode); security_ops->inode_free_security(inode); } int security_inode_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr, const initxattrs initxattrs, void *fs_data) { struct xattr new_xattrs[MAX_LSM_EVM_XATTR + 1]; struct xattr *lsm_xattr, *evm_xattr, *xattr; int ret; if (unlikely(IS_PRIVATE(inode))) return 0; memset(new_xattrs, 0, sizeof new_xattrs); if (!initxattrs) return security_ops->inode_init_security(inode, dir, qstr, NULL, NULL, NULL); lsm_xattr = new_xattrs; ret = security_ops->inode_init_security(inode, dir, qstr, &lsm_xattr->name, &lsm_xattr->value, &lsm_xattr->value_len); if (ret) goto out; evm_xattr = lsm_xattr + 1; ret = evm_inode_init_security(inode, lsm_xattr, evm_xattr); if (ret) goto out; ret = initxattrs(inode, new_xattrs, fs_data); out: for (xattr = new_xattrs; xattr->name != NULL; xattr++) { kfree(xattr->name); kfree(xattr->value); } return (ret == -EOPNOTSUPP) ? 0 : ret; } EXPORT_SYMBOL(security_inode_init_security); int security_old_inode_init_security(struct inode *inode, struct inode *dir, const struct qstr *qstr, char **name, void **value, size_t *len) { if (unlikely(IS_PRIVATE(inode))) return -EOPNOTSUPP; return security_ops->inode_init_security(inode, dir, qstr, name, value, len); } EXPORT_SYMBOL(security_old_inode_init_security); #ifdef CONFIG_SECURITY_PATH int security_path_mknod(struct path *dir, struct dentry *dentry, int mode, unsigned int dev) { if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_mknod(dir, dentry, mode, dev); } EXPORT_SYMBOL(security_path_mknod); int security_path_mkdir(struct path *dir, struct dentry *dentry, int mode) { if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_mkdir(dir, dentry, mode); } EXPORT_SYMBOL(security_path_mkdir); int security_path_rmdir(struct path *dir, struct dentry *dentry) { if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_rmdir(dir, dentry); } int security_path_unlink(struct path *dir, struct dentry *dentry) { if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_unlink(dir, dentry); } EXPORT_SYMBOL(security_path_unlink); int security_path_symlink(struct path *dir, struct dentry *dentry, const char *old_name) { if (unlikely(IS_PRIVATE(dir->dentry->d_inode))) return 0; return security_ops->path_symlink(dir, dentry, old_name); } int security_path_link(struct dentry *old_dentry, struct path *new_dir, struct dentry *new_dentry) { if (unlikely(IS_PRIVATE(old_dentry->d_inode))) return 0; return security_ops->path_link(old_dentry, new_dir, new_dentry); } int security_path_rename(struct path *old_dir, struct dentry *old_dentry, struct path *new_dir, struct dentry *new_dentry) { if (unlikely(IS_PRIVATE(old_dentry->d_inode) || (new_dentry->d_inode && IS_PRIVATE(new_dentry->d_inode)))) return 0; return security_ops->path_rename(old_dir, old_dentry, new_dir, new_dentry); } EXPORT_SYMBOL(security_path_rename); int security_path_truncate(struct path *path) { if (unlikely(IS_PRIVATE(path->dentry->d_inode))) return 0; return security_ops->path_truncate(path); } int security_path_chmod(struct dentry *dentry, struct vfsmount *mnt, mode_t mode) { if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; return security_ops->path_chmod(dentry, mnt, mode); } int security_path_chown(struct path *path, uid_t uid, gid_t gid) { if (unlikely(IS_PRIVATE(path->dentry->d_inode))) return 0; return security_ops->path_chown(path, uid, gid); } int security_path_chroot(struct path *path) { return security_ops->path_chroot(path); } #endif int security_inode_create(struct inode *dir, struct dentry *dentry, int mode) { if (unlikely(IS_PRIVATE(dir))) return 0; return security_ops->inode_create(dir, dentry, mode); } EXPORT_SYMBOL_GPL(security_inode_create); int security_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry) { if (unlikely(IS_PRIVATE(old_dentry->d_inode))) return 0; return security_ops->inode_link(old_dentry, dir, new_dentry); } int security_inode_unlink(struct inode *dir, struct dentry *dentry) { if (unlikely(IS_PRIVATE(dentry->d_inode))) return 0; return security_ops->inode_unlink(dir, dentry); }