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-rw-r--r--Documentation/filesystems/fuse.txt30
1 files changed, 21 insertions, 9 deletions
diff --git a/Documentation/filesystems/fuse.txt b/Documentation/filesystems/fuse.txt
index e7747774ceb9..324df27704cc 100644
--- a/Documentation/filesystems/fuse.txt
+++ b/Documentation/filesystems/fuse.txt
@@ -18,6 +18,14 @@ Non-privileged mount (or user mount):
18 user. NOTE: this is not the same as mounts allowed with the "user" 18 user. NOTE: this is not the same as mounts allowed with the "user"
19 option in /etc/fstab, which is not discussed here. 19 option in /etc/fstab, which is not discussed here.
20 20
21Filesystem connection:
22
23 A connection between the filesystem daemon and the kernel. The
24 connection exists until either the daemon dies, or the filesystem is
25 umounted. Note that detaching (or lazy umounting) the filesystem
26 does _not_ break the connection, in this case it will exist until
27 the last reference to the filesystem is released.
28
21Mount owner: 29Mount owner:
22 30
23 The user who does the mounting. 31 The user who does the mounting.
@@ -86,16 +94,20 @@ Mount options
86 The default is infinite. Note that the size of read requests is 94 The default is infinite. Note that the size of read requests is
87 limited anyway to 32 pages (which is 128kbyte on i386). 95 limited anyway to 32 pages (which is 128kbyte on i386).
88 96
89Sysfs 97Control filesystem
90~~~~~ 98~~~~~~~~~~~~~~~~~~
99
100There's a control filesystem for FUSE, which can be mounted by:
91 101
92FUSE sets up the following hierarchy in sysfs: 102 mount -t fusectl none /sys/fs/fuse/connections
93 103
94 /sys/fs/fuse/connections/N/ 104Mounting it under the '/sys/fs/fuse/connections' directory makes it
105backwards compatible with earlier versions.
95 106
96where N is an increasing number allocated to each new connection. 107Under the fuse control filesystem each connection has a directory
108named by a unique number.
97 109
98For each connection the following attributes are defined: 110For each connection the following files exist within this directory:
99 111
100 'waiting' 112 'waiting'
101 113
@@ -110,7 +122,7 @@ For each connection the following attributes are defined:
110 connection. This means that all waiting requests will be aborted an 122 connection. This means that all waiting requests will be aborted an
111 error returned for all aborted and new requests. 123 error returned for all aborted and new requests.
112 124
113Only a privileged user may read or write these attributes. 125Only the owner of the mount may read or write these files.
114 126
115Aborting a filesystem connection 127Aborting a filesystem connection
116~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 128~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -139,8 +151,8 @@ the filesystem. There are several ways to do this:
139 - Use forced umount (umount -f). Works in all cases but only if 151 - Use forced umount (umount -f). Works in all cases but only if
140 filesystem is still attached (it hasn't been lazy unmounted) 152 filesystem is still attached (it hasn't been lazy unmounted)
141 153
142 - Abort filesystem through the sysfs interface. Most powerful 154 - Abort filesystem through the FUSE control filesystem. Most
143 method, always works. 155 powerful method, always works.
144 156
145How do non-privileged mounts work? 157How do non-privileged mounts work?
146~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 158~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~