The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/bsd/sys/fsevents.h

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    1 #ifndef FSEVENT_H
    2 #define FSEVENT_H 1
    3 
    4 // Event types that you can ask to listen for
    5 #define FSE_INVALID             -1
    6 #define FSE_CREATE_FILE          0
    7 #define FSE_DELETE               1
    8 #define FSE_STAT_CHANGED         2
    9 #define FSE_RENAME               3
   10 #define FSE_CONTENT_MODIFIED     4
   11 #define FSE_EXCHANGE             5
   12 #define FSE_FINDER_INFO_CHANGED  6
   13 #define FSE_CREATE_DIR           7
   14 #define FSE_CHOWN                8
   15 
   16 #define FSE_MAX_EVENTS           9
   17 #define FSE_ALL_EVENTS         998
   18 
   19 #define FSE_EVENTS_DROPPED     999
   20 
   21 // Actions for each event type
   22 #define FSE_IGNORE    0
   23 #define FSE_REPORT    1
   24 #define FSE_ASK       2    // Not implemented yet
   25 
   26 // The types of each of the arguments for an event
   27 // Each type is followed by the size and then the
   28 // data.  FSE_ARG_VNODE is just a path string
   29 #define FSE_ARG_VNODE    0x0001   // next arg is a vnode pointer
   30 #define FSE_ARG_STRING   0x0002   // next arg is length followed by string ptr
   31 #define FSE_ARG_PATH     0x0003   // next arg is a full path
   32 #define FSE_ARG_INT32    0x0004   // next arg is a 32-bit int
   33 #define FSE_ARG_INT64    0x0005   // next arg is a 64-bit int
   34 #define FSE_ARG_RAW      0x0006   // next arg is a length followed by a void ptr
   35 #define FSE_ARG_INO      0x0007   // next arg is the inode number (ino_t)
   36 #define FSE_ARG_UID      0x0008   // next arg is the file's uid (uid_t)
   37 #define FSE_ARG_DEV      0x0009   // next arg is the file's dev_t
   38 #define FSE_ARG_MODE     0x000a   // next arg is the file's mode (as an int32, file type only)
   39 #define FSE_ARG_GID      0x000b   // next arg is the file's gid (gid_t)
   40 #define FSE_ARG_FINFO    0x000c   // kernel internal only
   41 #define FSE_ARG_DONE     0xb33f   // no more arguments
   42 
   43 #define FSE_MAX_ARGS     12
   44 
   45 
   46 // ioctl's on /dev/fsevents
   47 typedef struct fsevent_clone_args {
   48     int8_t  *event_list;
   49     int32_t  num_events;
   50     int32_t  event_queue_depth;
   51     int32_t *fd;
   52 } fsevent_clone_args;
   53 
   54 #define FSEVENTS_CLONE  _IOW('s', 1, fsevent_clone_args)
   55 
   56 
   57 // ioctl's on the cloned fd
   58 typedef struct fsevent_dev_filter_args {
   59     uint32_t  num_devices;
   60     dev_t    *devices;
   61 } fsevent_dev_filter_args;
   62 
   63 #define FSEVENTS_DEVICE_FILTER  _IOW('s', 100, fsevent_dev_filter_args)
   64 
   65 
   66 #ifdef KERNEL
   67 
   68 int  need_fsevent(int type, vnode_t vp);
   69 int  add_fsevent(int type, vfs_context_t, ...);
   70 void fsevent_unmount(struct mount *mp);
   71 
   72 // misc utility functions for fsevent info and pathbuffers...
   73 typedef struct fse_info {
   74     dev_t      dev;
   75     ino_t      ino;
   76     int32_t    mode;   // note: this is not a mode_t (it's 32-bits, not 16)
   77     uid_t      uid;
   78     gid_t      gid;
   79 } fse_info;
   80 
   81 int   get_fse_info(struct vnode *vp, fse_info *fse, vfs_context_t ctx);
   82 
   83 char *get_pathbuff(void);
   84 void  release_pathbuff(char *path);
   85 
   86 #endif /* KERNEL */
   87 
   88 #endif /* FSEVENT_H */

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