Re: Testing the 2TB file size limit
Re: Testing the 2TB file size limit
- Subject: Re: Testing the 2TB file size limit
- From: Jorgen Lundman <email@hidden>
- Date: Mon, 26 Jan 2015 17:15:02 +0900
Jim Luther wrote:
I don't know that the file system APIs on OSX/iOS support files larger than LONG_LONG_MAX since they use a signed-64 bit value for offsets.
Assuming a file system supports it, pathconf(path, _PC_FILESIZEBITS) would be the correct way to determine the maximum file size in bits. _PC_FILESIZEBITS returns the minimum number of bits required to hold the file system's maximum file size as a signed integer. The smallest value returned is 32.
This isn't directly related to the question, but I also found that in
addition to returning 64bit on _PC_FILESIZEBITS, if I try to do the same
for xattr:
* Even though ZFS has 64 bit limit on XATTR size, there would appear
to be a
* limit in SMB2 that the bit size returned has to be 18, or we will get an
* error from most XATTR calls (STATUS_ALLOTTED_SPACE_EXCEEDED).
*/
#ifndef AD_XATTR_SIZE_BITS
#define AD_XATTR_SIZE_BITS 18
.. just in case it would save someone having to discover the same.
Lund
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Filesystem-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden