/* * AppArmor security module * * This file contains AppArmor file mediation function definitions. * * Copyright (C) 1998-2008 Novell/SUSE * Copyright 2009-2010 Canonical Ltd. * * 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, version 2 of the * License. */ #ifndef __AA_FILE_H #define __AA_FILE_H #include "domain.h" #include "match.h" struct aa_profile; struct path; /* * We use MAY_EXEC, MAY_WRITE, MAY_READ, MAY_APPEND and the following flags * for profile permissions */ #define AA_MAY_CREATE 0x0010 #define AA_MAY_DELETE 0x0020 #define AA_MAY_META_WRITE 0x0040 #define AA_MAY_META_READ 0x0080 #define AA_MAY_CHMOD 0x0100 #define AA_MAY_CHOWN 0x0200 #define AA_MAY_LOCK 0x0400 #define AA_EXEC_MMAP 0x0800 #define AA_MAY_LINK 0x1000 #define AA_LINK_SUBSET AA_MAY_LOCK /* overlaid */ #define AA_MAY_ONEXEC 0x40000000 /* exec allows onexec */ #define AA_MAY_CHANGE_PROFILE 0x80000000 #define AA_MAY_CHANGEHAT 0x80000000 /* ctrl auditing only */ #define AA_AUDIT_FILE_MASK (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND |\ AA_MAY_CREATE | AA_MAY_DELETE | \ AA_MAY_META_READ | AA_MAY_META_WRITE | \ AA_MAY_CHMOD | AA_MAY_CHOWN | AA_MAY_LOCK | \ AA_EXEC_MMAP | AA_MAY_LINK) /* * The xindex is broken into 3 parts * - index - an index into either the exec name table or the variable table * - exec type - which determines how the executable name and index are used * - flags - which modify how the destination name is applied */ #define AA_X_INDEX_MASK 0x03ff #define AA_X_TYPE_MASK 0x0c00 #define AA_X_TYPE_SHIFT 10 #define AA_X_NONE 0x0000 #define AA_X_NAME 0x0400 /* use executable name px */ #define AA_X_TABLE 0x0800 /* use a specified name ->n# */ #define AA_X_UNSAFE 0x1000 #define AA_X_CHILD 0x2000 /* make >AA_X_NONE apply to children */ #define AA_X_INHERIT 0x4000 #define AA_X_UNCONFINED 0x8000 /* AA_SECURE_X_NEEDED - is passed in the bprm->unsafe field */ #define AA_SECURE_X_NEEDED 0x8000 /* need to make conditional which ones are being set */ struct path_cond { kuid_t uid; umode_t mode; }; /* struct file_perms - file permission * @allow: mask of permissions that are allowed * @audit: mask of permissions to force an audit message for * @quiet: mask of permissions to quiet audit messages for * @kill: mask of permissions that when matched will kill the task * @xindex: exec transition index if @allow contains MAY_EXEC * * The @audit and @queit mask should be mutually exclusive. */ struct file_perms { u32 allow; u32 audit; u32 quiet; u32 kill; u16 xindex; }; extern struct file_perms nullperms; #define COMBINED_PERM_MASK(X) ((X).allow | (X).audit | (X).quiet | (X).kill) /* FIXME: split perms from dfa and match this to description * also add delegation info. */ static inline u16 dfa_map_xindex(u16 mask) { u16 old_index = (mask >> 10) & 0xf; u16 index = 0; if (mask & 0x100) index |= AA_X_UNSAFE; if (mask & 0x200) index |= AA_X_INHERIT; if (mask & 0x80) index |= AA_X_UNCONFINED; if (old_index == 1) { index |= AA_X_UNCONFINED; } else if (old_index == 2) { index |= AA_X_NAME; } else if (old_index == 3) { index |= AA_X_NAME | AA_X_CHILD; } else if (old_index) { index |= AA_X_TABLE; index |= old_index - 4; } return index; } /* * map old dfa inline permissions to new format */ #define dfa_user_allow(dfa, state) (((ACCEPT_TABLE(dfa)[state]) & 0x7f) | \ ((ACCEPT_TABLE(dfa)[state]) & 0x80000000)) #define dfa_user_audit(dfa, state) ((ACCEPT_TABLE2(dfa)[state]) & 0x7f) #define dfa_user_quiet(dfa, state) (((ACCEPT_TABLE2(dfa)[state]) >> 7) & 0x7f) #define dfa_user_xindex(dfa, state) \ (dfa_map_xindex(ACCEPT_TABLE(dfa)[state] & 0x3fff)) #define dfa_other_allow(dfa, state) ((((ACCEPT_TABLE(dfa)[state]) >> 14) & \ 0x7f) | \ ((ACCEPT_TABLE(dfa)[state]) & 0x80000000)) #define dfa_other_audit(dfa, state) (((ACCEPT_TABLE2(dfa)[state]) >> 14) & 0x7f) #define dfa_other_quiet(dfa, state) \ ((((ACCEPT_TABLE2(dfa)[state]) >> 7) >> 14) & 0x7f) #define dfa_other_xindex(dfa, state) \ dfa_map_xindex((ACCEPT_TABLE(dfa)[state] >> 14) & 0x3fff) int aa_audit_file(struct aa_profile *profile, struct file_perms *perms, gfp_t gfp, int op, u32 request, const char *name, const char *target, kuid_t ouid, const char *info, int error); /** * struct aa_file_rules - components used for file rule permissions * @dfa: dfa to match path names and conditionals against * @perms: permission table indexed by the matched state accept entry of @dfa * @trans: transition table for indexed by named x transitions * * File permission are determined by matching a path against @dfa and then * then using the value of the accept entry for the matching state as * an index into @perms. If a named exec transition is required it is * looked up in the transition table. */ struct aa_file_rules { unsigned int start; struct aa_dfa *dfa; /* struct perms perms; */ struct aa_domain trans; /* TODO: add delegate table */ }; unsigned int aa_str_perms(struct aa_dfa *dfa, unsigned int start, const char *name, struct path_cond *cond, struct file_perms *perms); int aa_path_perm(int op, struct aa_profile *profile, const struct path *path, int flags, u32 request, struct path_cond *cond); int aa_path_link(struct aa_profile *profile, struct dentry *old_dentry, const struct path *new_dir, struct dentry *new_dentry); int aa_file_perm(int op, struct aa_profile *profile, struct file *file, u32 request); static inline void aa_free_file_rules(struct aa_file_rules *rules) { aa_put_dfa(rules->dfa); aa_free_domain_entries(&rules->trans); } /** * aa_map_file_perms - map file flags to AppArmor permissions * @file: open file to map flags to AppArmor permissions * * Returns: apparmor permission set for the file */ static inline u32 aa_map_file_to_perms(struct file *file) { int flags = file->f_flags; u32 perms = 0; if (file->f_mode & FMODE_WRITE) perms |= MAY_WRITE; if (file->f_mode & FMODE_READ) perms |= MAY_READ; if ((flags & O_APPEND) && (perms & MAY_WRITE)) perms = (perms & ~MAY_WRITE) | MAY_APPEND; /* trunc implies write permission */ if (flags & O_TRUNC) perms |= MAY_WRITE; if (flags & O_CREAT) perms |= AA_MAY_CREATE; return perms; } #endif /* __AA_FILE_H */ t.cgi/linux/net-next.git/diff/?id=1a0bee6c1e788218fd1d141db320db970aace7f0'>Diffstat (limited to 'net/smc/smc_cdc.c')