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new helper: security_sb_eat_lsm_opts()

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combination of alloc_secdata(), security_sb_copy_data(),
security_sb_parse_opt_str() and free_secdata().

Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2018-11-17 12:09:18 -05:00
parent c039bc3c24
commit f5c0c26d90
6 changed files with 20 additions and 77 deletions
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28
include/linux/security.h
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@@ -248,7 +248,7 @@ void security_bprm_committing_creds(struct linux_binprm *bprm);
void security_bprm_committed_creds(struct linux_binprm *bprm);
int security_sb_alloc(struct super_block *sb);
void security_sb_free(struct super_block *sb);
int security_sb_copy_data(char *orig, char *copy);
int security_sb_eat_lsm_opts(char *options, struct security_mnt_opts *opts);
int security_sb_remount(struct super_block *sb, struct security_mnt_opts *opts);
int security_sb_kern_mount(struct super_block *sb, int flags,
struct security_mnt_opts *opts);
@@ -556,7 +556,8 @@ static inline int security_sb_alloc(struct super_block *sb)
static inline void security_sb_free(struct super_block *sb)
{ }
static inline int security_sb_copy_data(char *orig, char *copy)
static inline int security_sb_eat_lsm_opts(char *options,
struct security_mnt_opts *opts)
{
return 0;
}
@@ -1823,28 +1824,5 @@ static inline void security_bpf_prog_free(struct bpf_prog_aux *aux)
#endif /* CONFIG_SECURITY */
#endif /* CONFIG_BPF_SYSCALL */
#ifdef CONFIG_SECURITY
static inline char *alloc_secdata(void)
{
return (char *)get_zeroed_page(GFP_KERNEL);
}
static inline void free_secdata(void *secdata)
{
free_page((unsigned long)secdata);
}
#else
static inline char *alloc_secdata(void)
{
return (char *)1;
}
static inline void free_secdata(void *secdata)
{ }
#endif /* CONFIG_SECURITY */
#endif /* ! __LINUX_SECURITY_H */