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fs: Add uoff_t

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In a recent commit, I inadvertently changed a comparison from being an
unsigned comparison (on 64-bit systems) to being a signed comparison
(which it had always been on 32-bit systems).  This led to a sporadic
fstests failure.

To make sure this comparison is always unsigned, introduce a new type,
uoff_t which is the unsigned version of loff_t.  Generally file sizes
are restricted to being a signed integer, but in these two places it is
convenient to pass -1 to indicate "up to the end of the file".

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://patch.msgid.link/20251123220518.1447261-1-willy@infradead.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2025-11-23 22:05:15 +00:00 • committed by Christian Brauner
parent a77a59592f
commit 37d369fa97
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6 changed files with 11 additions and 9 deletions
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1
include/uapi/asm-generic/posix_types.h
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@ -86,6 +86,7 @@ typedef struct {
*/
typedef __kernel_long_t __kernel_off_t;
typedef long long __kernel_loff_t;
typedef unsigned long long __kernel_uoff_t;
typedef __kernel_long_t __kernel_old_time_t;
#ifndef __KERNEL__
typedef __kernel_long_t __kernel_time_t;