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Add fallocate and use it instead of posix_fallocate if possible (#398)

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fuse.ko has supported FALLOC_FL_KEEP_SIZE and FALLOC_FL_PUNCH_HOLE at this
moment and more modes may be supported in the future.

fallocate(2) supports modes while posix_fallocate(2) does not, so this
makes lo_fallocate use fallocate(2) instead.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
This commit is contained in:
Liu Bo 2019-04-18 01:55:42 -07:00 committed by Nikolaus Rath
parent 9ec8e1c940
commit 5fc562c90d
2 changed files with 8 additions and 1 deletions
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7
example/passthrough_ll.c
View File

@ -936,12 +936,19 @@ static void lo_fallocate(fuse_req_t req, fuse_ino_t ino, int mode,
int err;
(void) ino;
#ifdef HAVE_FALLOCATE
err = fallocate(fi->fh, mode, offset, length);
if (err < 0)
err = errno;
#elif HAVE_POSIX_FALLOCATE
if (mode) {
fuse_reply_err(req, EOPNOTSUPP);
return;
}
err = posix_fallocate(fi->fh, offset, length);
#endif
fuse_reply_err(req, err);
}

2
meson.build
View File

@ -36,7 +36,7 @@ cfg.set_quoted('PACKAGE_VERSION', meson.project_version())
# Test for presence of some functions
test_funcs = [ 'fork', 'fstatat', 'openat', 'readlinkat', 'pipe2',
'splice', 'vmsplice', 'posix_fallocate', 'fdatasync',
'utimensat', 'copy_file_range' ]
'utimensat', 'copy_file_range', 'fallocate' ]
foreach func : test_funcs
cfg.set('HAVE_' + func.to_upper(),
cc.has_function(func, prefix: include_default, args: args_default))