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66917a3130
A new event mask FAN_OPEN_EXEC_PERM has been defined. This allows users to receive events and grant access to files that are intending to be opened for execution. Events of FAN_OPEN_EXEC_PERM type will be generated when a file has been opened by using either execve(), execveat() or uselib() system calls. This acts in the same manner as previous permission event mask, meaning that an access response is required from the user application in order to permit any further operations on the file. Signed-off-by: Matthew Bobrowski <mbobrowski@mbobrowski.org> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
134 lines
4.3 KiB
C
134 lines
4.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _UAPI_LINUX_FANOTIFY_H
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#define _UAPI_LINUX_FANOTIFY_H
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#include <linux/types.h>
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/* the following events that user-space can register for */
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#define FAN_ACCESS 0x00000001 /* File was accessed */
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#define FAN_MODIFY 0x00000002 /* File was modified */
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#define FAN_CLOSE_WRITE 0x00000008 /* Writtable file closed */
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#define FAN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
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#define FAN_OPEN 0x00000020 /* File was opened */
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#define FAN_OPEN_EXEC 0x00001000 /* File was opened for exec */
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#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
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#define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
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#define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
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#define FAN_OPEN_EXEC_PERM 0x00040000 /* File open/exec in perm check */
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#define FAN_ONDIR 0x40000000 /* event occurred against dir */
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#define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
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/* helper events */
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#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
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/* flags used for fanotify_init() */
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#define FAN_CLOEXEC 0x00000001
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#define FAN_NONBLOCK 0x00000002
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/* These are NOT bitwise flags. Both bits are used together. */
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#define FAN_CLASS_NOTIF 0x00000000
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#define FAN_CLASS_CONTENT 0x00000004
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#define FAN_CLASS_PRE_CONTENT 0x00000008
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
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FAN_CLASS_PRE_CONTENT)
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#define FAN_UNLIMITED_QUEUE 0x00000010
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#define FAN_UNLIMITED_MARKS 0x00000020
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#define FAN_ENABLE_AUDIT 0x00000040
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/* Flags to determine fanotify event format */
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#define FAN_REPORT_TID 0x00000100 /* event->pid is thread id */
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
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FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
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FAN_UNLIMITED_MARKS)
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/* flags used for fanotify_modify_mark() */
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#define FAN_MARK_ADD 0x00000001
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#define FAN_MARK_REMOVE 0x00000002
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#define FAN_MARK_DONT_FOLLOW 0x00000004
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#define FAN_MARK_ONLYDIR 0x00000008
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/* FAN_MARK_MOUNT is 0x00000010 */
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#define FAN_MARK_IGNORED_MASK 0x00000020
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#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
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#define FAN_MARK_FLUSH 0x00000080
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/* FAN_MARK_FILESYSTEM is 0x00000100 */
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/* These are NOT bitwise flags. Both bits can be used togther. */
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#define FAN_MARK_INODE 0x00000000
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#define FAN_MARK_MOUNT 0x00000010
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#define FAN_MARK_FILESYSTEM 0x00000100
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
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FAN_MARK_REMOVE |\
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FAN_MARK_DONT_FOLLOW |\
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FAN_MARK_ONLYDIR |\
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FAN_MARK_MOUNT |\
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FAN_MARK_IGNORED_MASK |\
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FAN_MARK_IGNORED_SURV_MODIFY |\
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FAN_MARK_FLUSH)
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_EVENTS (FAN_ACCESS |\
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FAN_MODIFY |\
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FAN_CLOSE |\
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FAN_OPEN)
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/*
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* All events which require a permission response from userspace
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*/
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
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FAN_ACCESS_PERM)
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/* Deprecated - do not use this in programs and do not add new flags here! */
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#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
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FAN_ALL_PERM_EVENTS |\
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FAN_Q_OVERFLOW)
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#define FANOTIFY_METADATA_VERSION 3
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struct fanotify_event_metadata {
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__u32 event_len;
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__u8 vers;
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__u8 reserved;
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__u16 metadata_len;
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__aligned_u64 mask;
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__s32 fd;
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__s32 pid;
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};
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struct fanotify_response {
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__s32 fd;
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__u32 response;
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};
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/* Legit userspace responses to a _PERM event */
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#define FAN_ALLOW 0x01
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#define FAN_DENY 0x02
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#define FAN_AUDIT 0x10 /* Bit mask to create audit record for result */
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/* No fd set in event */
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#define FAN_NOFD -1
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/* Helper functions to deal with fanotify_event_metadata buffers */
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#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
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#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
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(struct fanotify_event_metadata*)(((char *)(meta)) + \
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(meta)->event_len))
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#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
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(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
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(long)(meta)->event_len <= (long)(len))
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#endif /* _UAPI_LINUX_FANOTIFY_H */
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