update README with mount options

README

@@ -170,6 +170,12 @@ kernel_cache
   is still cached after the open(), so a read() system call will not
   always initiate a read operation.
 
+auto_cache
+
+  This option enables automatic flushing of the data cache on open().
+  The cache will only be flushed if the modification time or the size
+  of the file has changed.
+
 large_read
 
   Issue large read requests.  This can improve performance for some
@@ -197,6 +203,27 @@ max_read=N
   The default is infinite.  Note that the size of read requests is
   limited anyway to 32 pages (which is 128kbyte on i386).
 
+max_readahead=N
+
+  Set the maximum number of bytes to read-ahead.  The default is
+  determined by the kernel.  On linux-2.6.22 or earlier it's 131072
+  (128kbytes)
+
+max_write=N
+
+  Set the maximum number of bytes in a single write operation.  The
+  default is 128kbytes.  Note, that due to various limitations, the
+  size of write requests can be much smaller (4kbytes).  This
+  limitation will be removed in the future.
+
+async_read
+
+  Perform reads asynchronously. This is the default
+
+sync_read
+
+  Perform all reads (even read-ahead) synchronously.
+
 hard_remove
 
   The default behavior is that if an open file is deleted, the file is
@@ -226,7 +253,19 @@ debug
 
 fsname=NAME
 
-  Sets the filesystem name.  The default is the program name.
+  Sets the filesystem source (first field in /etc/mtab).  The default
+  is the program name.
+
+subtype=TYPE
+
+  Sets the filesystem type (third field in /etc/mtab).  The default is
+  the program name.
+
+  If the kernel suppports it, /etc/mtab and /proc/mounts will show the
+  filesystem type as "fuse.TYPE"
+
+  If the kernel doesn't support subtypes, the source filed will be
+  "TYPE#NAME", or if fsname option is not specified, just "TYPE".
 
 use_ino
 
@@ -271,6 +310,83 @@ blkdev
   Mount a filesystem backed by a block device.  This is a privileged
   option.  The device must be specified with the 'fsname=NAME' option.
 
+entry_timeout=T
+
+  The timeout in seconds for which name lookups will be cached. The
+  default is 1.0 second.  For all the timeout options, it is possible
+  to give fractions of a second as well (e.g. "-oentry_timeout=2.8")
+
+negative_timeout=T
+
+  The timeout in seconds for which a negative lookup will be cached.
+  This means, that if file did not exist (lookup retuned ENOENT), the
+  lookup will only be redone after the timeout, and the file/directory
+  will be assumed to not exist until then.  The default is 0.0 second,
+  meaning that caching negative lookups are disabled.
+
+attr_timeout=T
+
+  The timeout in seconds for which file/directory attributes are
+  cached.  The default is 1.0 second.
+
+ac_attr_timeout=T
+
+  The timeout in seconds for which file attributes are cached for the
+  purpose of checking if "auto_cache" should flush the file data on
+  open.   The default is the value of 'attr_timeout'
+
+intr
+
+  Allow requests to be interrupted.  Turning on this option may result
+  in unexpected behavior, if the filesystem does not support request
+  interruption.
+
+intr_signal=NUM
+
+  Specify which signal number to send to the filesystem when a request
+  is interrupted.  The default is 10 (USR1).
+
+modules=M1[:M2...]
+
+  Add modules to the filesystem stack.  Modules are pushed in the
+  order they are specified, with the original filesystem being on the
+  bottom of the stack.
+
+
+Modules distributed with fuse
+-----------------------------
+
+iconv
+`````
+Perform file name character set conversion.  Options are:
+
+from_code=CHARSET
+
+  Character set to convert from (see iconv -l for a list of possible
+  values).  Default is UTF-8.
+
+to_code=CHARSET
+
+  Character set to convert to.  Default is determined by the current
+  locale.
+
+
+subdir
+``````
+Prepend a given directory to each path. Options are:
+
+subdir=DIR
+
+  Directory to prepend to all paths.  This option is mandatory.
+
+rellinks
+
+  Transform absolute symlinks into relative
+
+norellinks
+
+  Do not transform absolute symlinks into relative.  This is the default.
+
 
 Reporting bugs
 ==============