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Edit File : fanotify.h \| Size : 5.22 KB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note / #ifndef _LINUX_FANOTIFY_H #define _LINUX_FANOTIFY_H #include <linux/types.h> / the following events that user-space can register for / #define FAN_ACCESS 0x00000001 / File was accessed / #define FAN_MODIFY 0x00000002 / File was modified / #define FAN_CLOSE_WRITE 0x00000008 / Writtable file closed / #define FAN_CLOSE_NOWRITE 0x00000010 / Unwrittable file closed / #define FAN_OPEN 0x00000020 / File was opened / #define FAN_OPEN_EXEC 0x00001000 / File was opened for exec / #define FAN_Q_OVERFLOW 0x00004000 / Event queued overflowed / #define FAN_OPEN_PERM 0x00010000 / File open in perm check / #define FAN_ACCESS_PERM 0x00020000 / File accessed in perm check / #define FAN_OPEN_EXEC_PERM 0x00040000 / File open/exec in perm check / #define FAN_ONDIR 0x40000000 / event occurred against dir / #define FAN_EVENT_ON_CHILD 0x08000000 / interested in child events / / helper events / #define FAN_CLOSE (FAN_CLOSE_WRITE \| FAN_CLOSE_NOWRITE) / close / / flags used for fanotify_init() / #define FAN_CLOEXEC 0x00000001 #define FAN_NONBLOCK 0x00000002 / These are NOT bitwise flags. Both bits are used together. / #define FAN_CLASS_NOTIF 0x00000000 #define FAN_CLASS_CONTENT 0x00000004 #define FAN_CLASS_PRE_CONTENT 0x00000008 / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF \| FAN_CLASS_CONTENT \| \ FAN_CLASS_PRE_CONTENT) #define FAN_UNLIMITED_QUEUE 0x00000010 #define FAN_UNLIMITED_MARKS 0x00000020 #define FAN_ENABLE_AUDIT 0x00000040 / Flags to determine fanotify event format / #define FAN_REPORT_TID 0x00000100 / event->pid is thread id / / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC \| FAN_NONBLOCK \| \ FAN_ALL_CLASS_BITS \| FAN_UNLIMITED_QUEUE \|\ FAN_UNLIMITED_MARKS) / flags used for fanotify_modify_mark() / #define FAN_MARK_ADD 0x00000001 #define FAN_MARK_REMOVE 0x00000002 #define FAN_MARK_DONT_FOLLOW 0x00000004 #define FAN_MARK_ONLYDIR 0x00000008 / FAN_MARK_MOUNT is 0x00000010 / #define FAN_MARK_IGNORED_MASK 0x00000020 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040 #define FAN_MARK_FLUSH 0x00000080 / FAN_MARK_FILESYSTEM is 0x00000100 / / These are NOT bitwise flags. Both bits can be used togther. / #define FAN_MARK_INODE 0x00000000 #define FAN_MARK_MOUNT 0x00000010 #define FAN_MARK_FILESYSTEM 0x00000100 / These are NOT bitwise flags. Both bits can be used togther. / #define FAN_MARK_INODE 0x00000000 #define FAN_MARK_MOUNT 0x00000010 / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD \|\ FAN_MARK_REMOVE \|\ FAN_MARK_DONT_FOLLOW \|\ FAN_MARK_ONLYDIR \|\ FAN_MARK_IGNORED_MASK \|\ FAN_MARK_IGNORED_SURV_MODIFY \|\ FAN_MARK_FLUSH\|\ FAN_MARK_TYPE_MASK) / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_EVENTS (FAN_ACCESS \|\ FAN_MODIFY \|\ FAN_CLOSE \|\ FAN_OPEN) / * All events which require a permission response from userspace / / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM \|\ FAN_ACCESS_PERM) / Deprecated - do not use this in programs and do not add new flags here! / #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS \|\ FAN_ALL_PERM_EVENTS \|\ FAN_Q_OVERFLOW) #define FANOTIFY_METADATA_VERSION 3 struct fanotify_event_metadata { __u32 event_len; __u8 vers; __u8 reserved; __u16 metadata_len; __aligned_u64 mask; __s32 fd; __s32 pid; }; / * User space may need to record additional information about its decision. * The extra information type records what kind of information is included. * The default is none. We also define an extra information buffer whose * size is determined by the extra information type. * * If the information type is Audit Rule, then the information following * is the rule number that triggered the user space decision that * requires auditing. / #define FAN_RESPONSE_INFO_NONE 0 #define FAN_RESPONSE_INFO_AUDIT_RULE 1 struct fanotify_response { __s32 fd; __u32 response; }; struct fanotify_response_info_header { __u8 type; __u8 pad; __u16 len; }; struct fanotify_response_info_audit_rule { struct fanotify_response_info_header hdr; __u32 rule_number; __u32 subj_trust; __u32 obj_trust; }; / Legit userspace responses to a _PERM event / #define FAN_ALLOW 0x01 #define FAN_DENY 0x02 #define FAN_AUDIT 0x10 / Bitmask to create audit record for result / #define FAN_INFO 0x20 / Bitmask to indicate additional information / / No fd set in event / #define FAN_NOFD -1 / Helper functions to deal with fanotify_event_metadata buffers / #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \ (struct fanotify_event_metadata)(((char )(meta)) + \ (meta)->event_len)) #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \ (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \ (long)(meta)->event_len <= (long)(len)) #endif / _LINUX_FANOTIFY_H */ Back

Edit File : fanotify.h | Size : 5.22 KB

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _LINUX_FANOTIFY_H
#define _LINUX_FANOTIFY_H

#include <linux/types.h>

/* the following events that user-space can register for */
#define FAN_ACCESS		0x00000001	/* File was accessed */
#define FAN_MODIFY		0x00000002	/* File was modified */
#define FAN_CLOSE_WRITE		0x00000008	/* Writtable file closed */
#define FAN_CLOSE_NOWRITE	0x00000010	/* Unwrittable file closed */
#define FAN_OPEN		0x00000020	/* File was opened */
#define FAN_OPEN_EXEC		0x00001000	/* File was opened for exec */

#define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */

#define FAN_OPEN_PERM		0x00010000	/* File open in perm check */
#define FAN_ACCESS_PERM		0x00020000	/* File accessed in perm check */
#define FAN_OPEN_EXEC_PERM	0x00040000	/* File open/exec in perm check */

#define FAN_ONDIR		0x40000000	/* event occurred against dir */

#define FAN_EVENT_ON_CHILD	0x08000000	/* interested in child events */

/* helper events */
#define FAN_CLOSE		(FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */

/* flags used for fanotify_init() */
#define FAN_CLOEXEC		0x00000001
#define FAN_NONBLOCK		0x00000002

/* These are NOT bitwise flags.  Both bits are used together.  */
#define FAN_CLASS_NOTIF		0x00000000
#define FAN_CLASS_CONTENT	0x00000004
#define FAN_CLASS_PRE_CONTENT	0x00000008

/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_CLASS_BITS	(FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
				 FAN_CLASS_PRE_CONTENT)

#define FAN_UNLIMITED_QUEUE	0x00000010
#define FAN_UNLIMITED_MARKS	0x00000020
#define FAN_ENABLE_AUDIT	0x00000040

/* Flags to determine fanotify event format */
#define FAN_REPORT_TID		0x00000100	/* event->pid is thread id */

/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_INIT_FLAGS	(FAN_CLOEXEC | FAN_NONBLOCK | \
				 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
				 FAN_UNLIMITED_MARKS)

/* flags used for fanotify_modify_mark() */
#define FAN_MARK_ADD		0x00000001
#define FAN_MARK_REMOVE		0x00000002
#define FAN_MARK_DONT_FOLLOW	0x00000004
#define FAN_MARK_ONLYDIR	0x00000008
/* FAN_MARK_MOUNT is		0x00000010 */
#define FAN_MARK_IGNORED_MASK	0x00000020
#define FAN_MARK_IGNORED_SURV_MODIFY	0x00000040
#define FAN_MARK_FLUSH		0x00000080
/* FAN_MARK_FILESYSTEM is	0x00000100 */

/* These are NOT bitwise flags.  Both bits can be used togther.  */
#define FAN_MARK_INODE		0x00000000
#define FAN_MARK_MOUNT		0x00000010
#define FAN_MARK_FILESYSTEM	0x00000100

/* These are NOT bitwise flags.  Both bits can be used togther.  */
#define FAN_MARK_INODE		0x00000000
#define FAN_MARK_MOUNT		0x00000010

/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_MARK_FLAGS	(FAN_MARK_ADD |\
				 FAN_MARK_REMOVE |\
				 FAN_MARK_DONT_FOLLOW |\
				 FAN_MARK_ONLYDIR |\
				 FAN_MARK_IGNORED_MASK |\
				 FAN_MARK_IGNORED_SURV_MODIFY |\
				 FAN_MARK_FLUSH|\
				 FAN_MARK_TYPE_MASK)

/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_EVENTS (FAN_ACCESS |\
			FAN_MODIFY |\
			FAN_CLOSE |\
			FAN_OPEN)

/*
 * All events which require a permission response from userspace
 */
/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
			     FAN_ACCESS_PERM)

/* Deprecated - do not use this in programs and do not add new flags here! */
#define FAN_ALL_OUTGOING_EVENTS	(FAN_ALL_EVENTS |\
				 FAN_ALL_PERM_EVENTS |\
				 FAN_Q_OVERFLOW)

#define FANOTIFY_METADATA_VERSION	3

struct fanotify_event_metadata {
	__u32 event_len;
	__u8 vers;
	__u8 reserved;
	__u16 metadata_len;
	__aligned_u64 mask;
	__s32 fd;
	__s32 pid;
};

/*
 * User space may need to record additional information about its decision.
 * The extra information type records what kind of information is included.
 * The default is none. We also define an extra information buffer whose
 * size is determined by the extra information type.
 *
 * If the information type is Audit Rule, then the information following
 * is the rule number that triggered the user space decision that
 * requires auditing.
 */

#define FAN_RESPONSE_INFO_NONE		0
#define FAN_RESPONSE_INFO_AUDIT_RULE	1

struct fanotify_response {
	__s32 fd;
	__u32 response;
};

struct fanotify_response_info_header {
	__u8 type;
	__u8 pad;
	__u16 len;
};

struct fanotify_response_info_audit_rule {
	struct fanotify_response_info_header hdr;
	__u32 rule_number;
	__u32 subj_trust;
	__u32 obj_trust;
};

/* Legit userspace responses to a _PERM event */
#define FAN_ALLOW	0x01
#define FAN_DENY	0x02
#define FAN_AUDIT	0x10	/* Bitmask to create audit record for result */
#define FAN_INFO	0x20	/* Bitmask to indicate additional information */

/* No fd set in event */
#define FAN_NOFD	-1

/* Helper functions to deal with fanotify_event_metadata buffers */
#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))

#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
				   (struct fanotify_event_metadata*)(((char *)(meta)) + \
				   (meta)->event_len))

#define FAN_EVENT_OK(meta, len)	((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
				(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
				(long)(meta)->event_len <= (long)(len))

#endif /* _LINUX_FANOTIFY_H */

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