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perfused(8) [netbsd man page]

PERFUSED(8)						    BSD System Manager's Manual 					       PERFUSED(8)

NAME

     perfused -- PUFFS Enabled Relay to FUSE Daemon

SYNOPSIS

     perfused [-fs] [-d types] [-i -fd]

DESCRIPTION

     perfused is a userland daemon implementing the FUSE kernel level API.  It creates a /dev/fuse socket for FUSE file system daemons to connect
     to.  perfused takes care of mounting the file system using puffs(3).

     When the kernel sends a puffs(3) operation for the mounted file system, perfused will translate it into a FUSE request, and will send it to
     the file system daemon through /dev/fuse.	The FUSE reply will be converted back into a puffs(3) reply and will be relayed to the kernel.

     FUSE file system daemons must be modified so that they request perfused to perform the mount(2) system call instead of doing it on their own.
     This is done by replacing mount(2) and the open(2) calls for /dev/fuse with perfuse_mount() and perfuse_open(), respectively, in their
     sources.  libperfuse(3) must be used at link time.  Most FUSE file system daemons use libfuse and will work unmodified, provided the modifi-
     cation is done in libfuse itself .

     The following options are available:

     -d types	 Print additional debug information.  types is a comma-separated list of information types to print:

		 puffs	 Display PUFFS requests and replies.

		 fuse	 Display FUSE requests and replies.

		 dump	 Dump content of FUSE frames.

		 fh	 Display file handle activity.

		 reclaim
			 Display reclaim activity.

		 readdir
			 Display readdir activity.

		 requeue
			 Display requeue activity.

		 sync	 Display dirty flags and sync operations.

     -f 	 Do not fork, but stay in the foreground.

     -i fd	 Do not open /dev/fuse but use the socket available from the file descriptor fd.  This is used when perfused is started from
		 libperfuse(3).

     -s 	 Enable debug output only when receiving SIGINFO.

SIGNALS

     SIGINFO
	     If the -s flag was used, toggle debug output.  Do nothing otherwise.

     SIGUSR1
	     Toggle FUSE operation dump on and off.  When toggling off, the trace is is stored in /var/run/perfuse-xxx.trace (xxx is the filesys-
	     tem mount point).

ERRORS

     The program logs to the syslog daemon as facility ``daemon''.  For detailed debugging use the -d (debug) option.

SEE ALSO

     mount(2), perfuse_mount(3), puffs(4)

AUTHORS

     The program was written by Emmanuel Dreyfus <manu@NetBSD.org>.

BUGS

     When perfused runs in the foreground (using the -f flag), some processes using the FUSE file system will sometime hang on 'uvn_fp2'.

BSD
								 January 29, 2012							       BSD

Check Out this Related Man Page

FUSEFAT(1)							   User Commands							FUSEFAT(1)

NAME

       FUSEFAT - FUSE module for FAT

SYNOPSIS

       fusefat [OPTION]... imagefile mountpoint

       fusefat imagefile mountpoint [OPTION]...

OPTIONS

   General options
       -o opt,[opt...]
	      mount options

       -h   --help
	      print help

       -V   --version
	      print version

   FUSEFAT options:
       -o rw+ enable read-write mount (EXPERIMENTAL)

   FUSE options:
       -d, -o debug
	      enable debug output (implies -f)

       -f     foreground operation

       -s     disable multi-threaded operation

       -o allow_other
	      allow access to other users

       -o allow_root
	      allow access to root

       -o nonempty
	      allow mounts over non-empty file/dir

       -o default_permissions
	      enable permission checking by kernel

       -o fsname=NAME
	      set filesystem name

       -o large_read
	      issue large read requests (2.4 only)

       -o max_read=N
	      set maximum size of read requests

       -o hard_remove
	      immediate removal (don't hide files)

       -o use_ino
	      let filesystem set inode numbers

       -o readdir_ino
	      try to fill in d_ino in readdir

       -o direct_io
	      use direct I/O

       -o kernel_cache
	      cache files in kernel

       -o [no]auto_cache
	      enable caching based on modification times

       -o umask=M
	      set file permissions (octal)

       -o uid=N
	      set file owner

       -o gid=N
	      set file group

       -o entry_timeout=T
	      cache timeout for names (1.0s)

       -o negative_timeout=T
	      cache timeout for deleted names (0.0s)

       -o attr_timeout=T
	      cache timeout for attributes (1.0s)

       -o ac_attr_timeout=T
	      auto cache timeout for attributes (attr_timeout)

       -o intr
	      allow requests to be interrupted

       -o intr_signal=NUM
	      signal to send on interrupt (10)

       -o max_write=N
	      set maximum size of write requests

       -o max_readahead=N
	      set maximum readahead

       -o async_read
	      perform reads asynchronously (default)

       -o sync_read
	      perform reads synchronously

AUTHORS

       See http://wiki.virtualsquare.org.

SEE ALSO

       fuseiso9660(1), fuseext2(1)

FUSE
/UMFUSE modules						   June 19, 2008							FUSEFAT(1)
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