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Signed-off-by: izxl007 <zeng.zheng@zte.com.cn>
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Signed-off-by: Bernd Schubert <bschubert@ddn.com>
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_int can be confused with 'integer'
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Read/writes IOs should be page aligned as fuse server
might need to copy data to another buffer otherwise in
order to fulfill network or device storage requirements.
Simple reproducer is example/passthrough*
and opening a file with O_DIRECT - without this change
writing to that file failed with -EINVAL if the underlying
file system was using ext4 (for passthrough_hp the
'passthrough' feature has to be disabled).
The mis-alignment from fuse kernel is not ideal, but we can handle
it by allocation one page more than needed and then using a buffer
that is set up to compensate for kernel misalignment.
This also only set se->buf_reallocable to true when called
by a libfuse internal caller - we do not know what
external callers are doing with the buffer - update to
commit 0e0f43b79b9b
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No functional changes.
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This addresses: https://github.com/libfuse/libfuse/issues/724
HAVE_LIBC_VERSIONED_SYMBOLS configures the library if to use
versioned symbols and is set at meson configuration time.
External filesystems (the main target, actually)
include fuse headers and the preprocessor
then acts on HAVE_LIBC_VERSIONED_SYMBOLS. Problem was now that
'config.h' was not distributed with libfuse and so
HAVE_LIBC_VERSIONED_SYMBOLS was never defined with external
tools and the preprocessor did the wrong decision.
This commit also increases the the minimal meson version,
as this depends on meson feature only available in 0.50
<quote 'meson' >
WARNING: Project specifies a minimum meson_
version '>= 0.42' but uses features which were added
in newer versions:
* 0.50.0: {'install arg in configure_file'}
</quote>
Additionally the config file has been renamed to "fuse_config.h"
to avoid clashes - 'config.h' is not very specific.
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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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This should make more clear what file contains code for what
purpose.
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add AC_SYS_LARGEFILE to your configure.ac instead.
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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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Replace fuse_session_next_chan() with fuse_session_chan(), as multiple
channels per session were never actually supported and probably never will.
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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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