Badari Pulavarty wrote:
Amit K. Arora wrote:
This is to give a heads up on few patches that we will be soon coming up
with. These patches implement a new system call sys_fallocate() and a
new inode operation "fallocate", for persistent preallocation. The new
system call, as Andrew suggested, will look like:
asmlinkage long sys_fallocate(int fd, loff_t offset, loff_t len);
I am wondering about return values from this syscall ? Is it supposed to
return the
number of bytes allocated ? What about partial allocations ?
If you don't have enough blocks to cover the request, you should
probably just return -ENOSPC, not a partial allocation.
What about
if the
blocks already exists ? What would be return values in those cases ?
0 on success, other normal errors oetherwise..
If asked for a range that includes already-allocated blocks, you just
allocate any non-allocated blocks in the range, I think.
-Eric
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