Commit 1284ab5b authored by Mimi Zohar's avatar Mimi Zohar Committed by James Morris

fs: define a string representation of the kernel_read_file_id enumeration

A string representation of the kernel_read_file_id enumeration is
needed for displaying messages (eg. pr_info, auditing) that can be
used by multiple LSMs and the integrity subsystem.  To simplify
keeping the list of strings up to date with the enumeration, this
patch defines two new preprocessing macros named __fid_enumify and
__fid_stringify to create the enumeration and an array of strings.
kernel_read_file_id_str() returns a string based on the enumeration.
Signed-off-by: default avatarMimi Zohar <zohar@linux.vnet.ibm.com>
[kees: removed removal of my old version, constified pointer values]
Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarJames Morris <james.l.morris@oracle.com>
parent 8a56038c
...@@ -2580,15 +2580,34 @@ static inline void i_readcount_inc(struct inode *inode) ...@@ -2580,15 +2580,34 @@ static inline void i_readcount_inc(struct inode *inode)
#endif #endif
extern int do_pipe_flags(int *, int); extern int do_pipe_flags(int *, int);
#define __kernel_read_file_id(id) \
id(UNKNOWN, unknown) \
id(FIRMWARE, firmware) \
id(MODULE, kernel-module) \
id(KEXEC_IMAGE, kexec-image) \
id(KEXEC_INITRAMFS, kexec-initramfs) \
id(POLICY, security-policy) \
id(MAX_ID, )
#define __fid_enumify(ENUM, dummy) READING_ ## ENUM,
#define __fid_stringify(dummy, str) #str,
enum kernel_read_file_id { enum kernel_read_file_id {
READING_FIRMWARE = 1, __kernel_read_file_id(__fid_enumify)
READING_MODULE, };
READING_KEXEC_IMAGE,
READING_KEXEC_INITRAMFS, static const char * const kernel_read_file_str[] = {
READING_POLICY, __kernel_read_file_id(__fid_stringify)
READING_MAX_ID
}; };
static inline const char * const kernel_read_file_id_str(enum kernel_read_file_id id)
{
if (id < 0 || id >= READING_MAX_ID)
return kernel_read_file_str[READING_UNKNOWN];
return kernel_read_file_str[id];
}
extern int kernel_read(struct file *, loff_t, char *, unsigned long); extern int kernel_read(struct file *, loff_t, char *, unsigned long);
extern int kernel_read_file(struct file *, void **, loff_t *, loff_t, extern int kernel_read_file(struct file *, void **, loff_t *, loff_t,
enum kernel_read_file_id); enum kernel_read_file_id);
......
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