Jim Mostek writes:
> I don't see a callout from sys_fcntl into a file system specific routine
> (other than for file locking). There is a lock callout in
> the file operations that can be invoked in fcntl_getlk/fcntl_setlk/...
> (I'm looking in 2.3.42). But, this is different than file system specific
> fcntls. There is a call to sock_fcntl if the inode is a socket. But, I
> don't see a call for a file system specific fcntl in sys_fcntl..
> XFS has several fcntls for things like preallocating space. This is used
> by some applications who want very large files. This let's a file system
> allocate the space all at once.
> Has the issue of a file_operation callout for fcntl gone around before?
> Anyone opposed to adding this? I don't think this belongs in the
As I understand it, Linux does do this sort of thing via ioctl(),
not fcntl(). The logic is that fcntl() is for attributes of "file" objects.
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This archive was generated by hypermail 2b29 : Wed Mar 15 2000 - 21:00:27 EST