[haiku-bugs] Re: [Haiku] #6285: Implement posix_fallocate()
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Thu, 14 Oct 2010 20:04:15 -0000
#6285: Implement posix_fallocate()
---------------------------+------------------------------------------------
Reporter: korli | Owner: nobody
Type: enhancement | Status: new
Priority: low | Milestone: R1
Component: System/POSIX | Version: R1/alpha2
Resolution: | Keywords:
Blocked By: | Has a Patch: 0
Platform: All | Blocking:
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Comment (by bonefish):
Replying to [comment:4 korli]:
> I'm in the process of adding the following call to struct fs_vnode_ops
in headers/os/drivers/fs_interface.h (just after write_stat()):
> {{{
> status_t fallocate(fs_volume* volume, fs_vnode* vnode, off_t offset,
off_t len);
> }}}
>
> Some objections?
Nope, but don't forget add the call also to the fs_shell and userlandfs.
Replying to [comment:5 axeld]:
> Yes - the name is awful. I would just call it preallocate().
+1
> Beyond that, it might not always be simple to implement, and I am unsure
if we would need to return "ok" in that case anyway.
Then the function wouldn't make much sense. The whole point is that after
a successful call of the function, writes cannot fail due to lack of disk
space. If the file system can't ensure that, it has to fail, returning a
suitable error code (`ENOSYS` or `ENOTSUP`).
--
Ticket URL: <http://dev.haiku-os.org/ticket/6285#comment:6>
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