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The fuse_session_loop_mt() and fuse_loop_mt() symbols are only visible
when linking against the shared object. The code in lib/, however, is
compiled *into* the shared object and should thus use the internal
names of these functions.
Surprisingly enough, the code still worked before - but only when link
time optimization was disabled.
Unfortunately, we still can't compile with LTO because it seems that
enabling LTO somehow makes the tagged symbols vanish.
Without lto, we have:
$ nm lib/libfuse3.so | grep fuse_new
0000000000011070 T fuse_new_30
0000000000010a00 t fuse_new_31
0000000000011070 T fuse_new@FUSE_3.0
0000000000010a00 T fuse_new@@FUSE_3.1
and with LTO:
$ nm lib/libfuse3.so | grep fuse_new
0000000000019a70 T fuse_new_30
0000000000019270 t fuse_new_31
See also issue #198.
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this fixes building with lto, which failed since commit 503e32d01e4db00e90d7acfd81ab05386559069f
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-oallow_root is handled in userspace, and requires passing -oallow_other
to the kernel. This patch should make the code easier to understand and
avoid the confusion that gave rise to issue #86.
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Eventually, this setting should be negotiated in the filesystem's init()
handler (like e.g. max_write). However, this requires corresponding
changes in the FUSE kernel module. In preparation for this (and to allow
a transition period) we already allow (and require) filesystems to set
the value in the init() handler in addition to the mount option.
The end-goal is tracked in issue #91.
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Both the BSD and Linux implementation actually accept mostly the same
FUSE-specific mount options. Up to now, the BSD help function appended
the output of ``mount_fusefs --help``, but looking at
http://www.unix.com/man-page/freebsd/8/mount_fusefs/ this is likely more
confusing than helpful (since the user is not actually invoking
mount_fusefs directly, most of the options don't make sense).
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Instead of using command line options to modify struct fuse_conn_info
before and after calling the init() handler, we now give the file system
explicit control over this.
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This option really affects the behavior of the session loop, not the
low-level interface. Therefore, it does not belong in the fuse_session
object.
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The session options are used only once to determine the proper
conn->want flags. It is nice to have them clearly separated from the
other struct fuse_session members that are used throughout the life of
the file system.
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This is redundant with the capability flags in `wants` and `capable`.
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This option is obsolete and should always be enabled. File systems that
want to limit the size of write requests should use the
``-o max_write=<N>`` option instead.
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Merged the structures, and replaced fuse_ll with fuse_session
in all type definitions.
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This is a code simplification patch.
- It confines most of the implementation channel implementation into
fuse_loop_mt (which is its only user).
- It makes it more obvious in the code that channels are only ever used
when using -o clone_fd and multi-threaded main loop.
- It simplies the definition of both struct fuse_session and struct
fuse_chan.
- Theoretically it should result in (minuscule) performance
improvements when not using -o clone_fd.
- Overall, it removes a lot more lines of source code than it adds :-).
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The only struct fuse_chan that's accessible to the user application is
the "master" channel that is returned by fuse_mount and stored in struct
fuse_session.
When using the multi-threaded main loop with the "clone_fd" option, each
worker thread gets its own struct fuse_chan. However, none of these are
available to the user application, nor do they hold references to struct
fuse_session (the pointer is always null).
Therefore, any presence of struct fuse_chan can be removed
without loss of functionality by relying on struct fuse_session instead.
This reduces the number of API functions and removes a potential source
of confusion (since the new API no longer looks as if it might be
possible to add multiple channels to one session, or to share one
channel between multiple sessions).
Fixes issue #17.
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This function is only used in one place.
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This creates a separate device file descriptor for each processing thread,
which might improve performance.
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New functions: fuse_chan_get(), fuse_chan_put(). Removed function:
fuse_chan_destroy().
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Asynchronous direct I/O is supported by linux kernels 3.13 and
later, writeback caching is supported by 3.14 and later.
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There's actually just one type of channel and session, so we don't need the
generic callback functions.
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Remove fuse_chan_bufsize() from the lowlevel API.
fuse_session_receive_buf() is now responsible for allocating memory for the
buffer.
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Move the fuse_chan_ops.send and .receive implementations to fuse_lowlevel.c. The abstraction wasn't actually useful and made the the splice implementation more difficult.
Remove fuse_chan_ops.send and fuse_chan_ops.receive.
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Clean up fuse_chan related interfaces. Remove the following from the
lowlevel library API:
struct fuse_chan_ops;
fuse_chan_new();
fuse_chan_session();
fuse_chan_recv();
fuse_chan_send();
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Clean up fuse_session related interfaces. Remove the following from the
lowlevel library API:
struct fuse_session_ops;
fuse_session_new();
fuse_session_process();
fuse_session_data();
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- fuse_kern_unmount closes handle (e.g. 19)
- a thread in my process opens a file - the OS assigns newly freed
handle (i.e. 19)
- fuse_kern_chan_destroy closes the same handle (i.e. 19)
- a thread in my process opens another file - the OS assigns newly
freed handle (i.e. 19)
- * MAYHEM *
Reported by Dan Greenfield
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This switches the -o no_readdirplus option to a tristate
string: -o readdirplus=(yes|no|auto)
Telling the kernel to always use readdirplus is beneficial to
filesystems (e.g. GlusterFS) where the cost to perform readdir
and readdirplus are identical.
The default remains "auto" (if supported).
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This patch implements readdirplus support in FUSE usersapce. It adds
a new fuse lowlevel operations fuse_lowleve_ops::readdir_plus,
corespoding mount options and helper functions to maintain buffer.
[From: Eric Wong <normalperson@yhbt.net>]
This makes our terminology consistent with NFS and
our kernel module, as well as reducing user/developer
confusion in the command-line.
Note: I'm keeping "fuse_add_direntry_plus" since that is
less standardized in its use than "readdirplus" for now.
Signed-off-by: Feng Shuo <steve.shuo.feng@gmail.com>
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Several caching logic changes have been made on the kernel side
to better support network-based fuse filesystems. These include
kernel side mtime checking and read path cache revalidation. The
new caching logic is enabled through the FUSE_AUTO_INVAL_DATA
init flag. Export this to the user via the '[no_]auto_inval_data'
mount option.
Signed-off-by: Feng Shuo <steve.shuo.feng@gmail.com>
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This fixes problems with emulating flock() with POSIX locking.
Reported by Sebastian Pipping.
As with lock/setlk/getlk most filesystems don't need to implement
this, as the kernel takes care of file locking. The only reason to
implement locking operations is for network filesystems which want
file locking to work between clients.
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This works similar to "noforget" except that eventually the node will
be allowed to expire from the cache.
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Fix the ambiguity of ioctl ABI on the kernel/userspace boundary
for 32bit vs. 64bit userspace
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Disable splice by default, add "splice_read", "splice_write" and
"splice_move" options. Keep the "no_splice_*" variants, which can
disable splice even if the filesystem explicitly enables it.
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Retrieve data stored in the kernel buffers for a given inode.
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Add new ->write_buf() method to low level interface. This
allows passig a generic buffer, either containing a memory buffer
or a file descriptor. This allows implementing zero copy writes.
Add fuse_session_receive_buf() and fuse_session_process_buf()
which may be used in event loop implementations to replace
fuse_chan_recv() and fuse_session_process() respectively.
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Add a generic buffer interface for use with I/O. Buffer vectors are
supplied and each buffer in the vector may be a memory pointer or a
file descriptor.
The fuse_reply_fd() interface is converted to using buffers.
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* Make sure all global symbols are prefixed with "fuse_" or "cuse_"
* Released 2.8.0
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Nikolaus Rath
userwithuid
Miklos Szeredi
Fabrice Bauzac
Eric Wong
Feng Shuo
therealneworld@gmail.com
Miklos Szeredi