notify/fanotify/fanotify.h

56 #define FANOTIFY_DIR_FH_SIZE(info)	((info)->dir_fh_totlen)
57 #define FANOTIFY_DIR2_FH_SIZE(info)	((info)->dir2_fh_totlen)
58 #define FANOTIFY_FILE_FH_SIZE(info)	((info)->file_fh_totlen)
59 #define FANOTIFY_NAME_SIZE(info)	((info)->name_len + 1)
60 #define FANOTIFY_NAME2_SIZE(info)	((info)->name2_len + 1)
62 #define FANOTIFY_DIR_FH_OFFSET(info)	0
63 #define FANOTIFY_DIR2_FH_OFFSET(info) \
64 	(FANOTIFY_DIR_FH_OFFSET(info) + FANOTIFY_DIR_FH_SIZE(info))
65 #define FANOTIFY_FILE_FH_OFFSET(info) \
66 	(FANOTIFY_DIR2_FH_OFFSET(info) + FANOTIFY_DIR2_FH_SIZE(info))
67 #define FANOTIFY_NAME_OFFSET(info) \
68 	(FANOTIFY_FILE_FH_OFFSET(info) + FANOTIFY_FILE_FH_SIZE(info))
69 #define FANOTIFY_NAME2_OFFSET(info) \
70 	(FANOTIFY_NAME_OFFSET(info) + FANOTIFY_NAME_SIZE(info))
72 #define FANOTIFY_DIR_FH_BUF(info) \
73 	((info)->buf + FANOTIFY_DIR_FH_OFFSET(info))
74 #define FANOTIFY_DIR2_FH_BUF(info) \
75 	((info)->buf + FANOTIFY_DIR2_FH_OFFSET(info))
76 #define FANOTIFY_FILE_FH_BUF(info) \
77 	((info)->buf + FANOTIFY_FILE_FH_OFFSET(info))
78 #define FANOTIFY_NAME_BUF(info) \
79 	((info)->buf + FANOTIFY_NAME_OFFSET(info))
80 #define FANOTIFY_NAME2_BUF(info) \
81 	((info)->buf + FANOTIFY_NAME2_OFFSET(info))
107 static inline int fanotify_info_dir_fh_len(struct fanotify_info *info)
109 	if (!info->dir_fh_totlen ||
110 	    WARN_ON_ONCE(info->dir_fh_totlen < FANOTIFY_FH_HDR_LEN))
113 	return info->dir_fh_totlen - FANOTIFY_FH_HDR_LEN;
116 static inline struct fanotify_fh *fanotify_info_dir_fh(struct fanotify_info *info)
120 	return (struct fanotify_fh *)FANOTIFY_DIR_FH_BUF(info);
123 static inline int fanotify_info_dir2_fh_len(struct fanotify_info *info)
125 	if (!info->dir2_fh_totlen ||
126 	    WARN_ON_ONCE(info->dir2_fh_totlen < FANOTIFY_FH_HDR_LEN))
129 	return info->dir2_fh_totlen - FANOTIFY_FH_HDR_LEN;
132 static inline struct fanotify_fh *fanotify_info_dir2_fh(struct fanotify_info *info)
134 	return (struct fanotify_fh *)FANOTIFY_DIR2_FH_BUF(info);
137 static inline int fanotify_info_file_fh_len(struct fanotify_info *info)
139 	if (!info->file_fh_totlen ||
140 	    WARN_ON_ONCE(info->file_fh_totlen < FANOTIFY_FH_HDR_LEN))
143 	return info->file_fh_totlen - FANOTIFY_FH_HDR_LEN;
146 static inline struct fanotify_fh *fanotify_info_file_fh(struct fanotify_info *info)
148 	return (struct fanotify_fh *)FANOTIFY_FILE_FH_BUF(info);
151 static inline char *fanotify_info_name(struct fanotify_info *info)
153 	if (!info->name_len)
156 	return FANOTIFY_NAME_BUF(info);
159 static inline char *fanotify_info_name2(struct fanotify_info *info)
161 	if (!info->name2_len)
164 	return FANOTIFY_NAME2_BUF(info);
167 static inline void fanotify_info_init(struct fanotify_info *info)
172 	info->dir_fh_totlen = 0;
173 	info->dir2_fh_totlen = 0;
174 	info->file_fh_totlen = 0;
175 	info->name_len = 0;
176 	info->name2_len = 0;
180 static inline void fanotify_info_set_dir_fh(struct fanotify_info *info,
183 	if (WARN_ON_ONCE(info->dir2_fh_totlen > 0) ||
184 	    WARN_ON_ONCE(info->file_fh_totlen > 0) ||
185 	    WARN_ON_ONCE(info->name_len > 0) ||
186 	    WARN_ON_ONCE(info->name2_len > 0))
189 	info->dir_fh_totlen = totlen;
192 static inline void fanotify_info_set_dir2_fh(struct fanotify_info *info,
195 	if (WARN_ON_ONCE(info->file_fh_totlen > 0) ||
196 	    WARN_ON_ONCE(info->name_len > 0) ||
197 	    WARN_ON_ONCE(info->name2_len > 0))
200 	info->dir2_fh_totlen = totlen;
203 static inline void fanotify_info_set_file_fh(struct fanotify_info *info,
206 	if (WARN_ON_ONCE(info->name_len > 0) ||
207 	    WARN_ON_ONCE(info->name2_len > 0))
210 	info->file_fh_totlen = totlen;
213 static inline void fanotify_info_copy_name(struct fanotify_info *info,
217 	    WARN_ON_ONCE(info->name2_len > 0))
220 	info->name_len = name->len;
221 	strcpy(fanotify_info_name(info), name->name);
224 static inline void fanotify_info_copy_name2(struct fanotify_info *info,
230 	info->name2_len = name->len;
231 	strcpy(fanotify_info_name2(info), name->name);
300 	struct fanotify_info info;
343 		return fanotify_info_file_fh(&FANOTIFY_NE(event)->info);
354 		return &FANOTIFY_NE(event)->info;
361 	struct fanotify_info *info = fanotify_event_info(event);
364 	if (info)
365 		return info->file_fh_totlen ? fh->len : 0;
372 	struct fanotify_info *info = fanotify_event_info(event);
374 	return info ? fanotify_info_dir_fh_len(info) : 0;
379 	struct fanotify_info *info = fanotify_event_info(event);
381 	return info ? fanotify_info_dir2_fh_len(info) : 0;
440 	const loff_t *ppos;		/* optional file range info */