linux/fs/f2fs
Linus Torvalds f1947d7c8a Random number generator fixes for Linux 6.1-rc1.
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Merge tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random

Pull more random number generator updates from Jason Donenfeld:
 "This time with some large scale treewide cleanups.

  The intent of this pull is to clean up the way callers fetch random
  integers. The current rules for doing this right are:

   - If you want a secure or an insecure random u64, use get_random_u64()

   - If you want a secure or an insecure random u32, use get_random_u32()

     The old function prandom_u32() has been deprecated for a while
     now and is just a wrapper around get_random_u32(). Same for
     get_random_int().

   - If you want a secure or an insecure random u16, use get_random_u16()

   - If you want a secure or an insecure random u8, use get_random_u8()

   - If you want secure or insecure random bytes, use get_random_bytes().

     The old function prandom_bytes() has been deprecated for a while
     now and has long been a wrapper around get_random_bytes()

   - If you want a non-uniform random u32, u16, or u8 bounded by a
     certain open interval maximum, use prandom_u32_max()

     I say "non-uniform", because it doesn't do any rejection sampling
     or divisions. Hence, it stays within the prandom_*() namespace, not
     the get_random_*() namespace.

     I'm currently investigating a "uniform" function for 6.2. We'll see
     what comes of that.

  By applying these rules uniformly, we get several benefits:

   - By using prandom_u32_max() with an upper-bound that the compiler
     can prove at compile-time is ≤65536 or ≤256, internally
     get_random_u16() or get_random_u8() is used, which wastes fewer
     batched random bytes, and hence has higher throughput.

   - By using prandom_u32_max() instead of %, when the upper-bound is
     not a constant, division is still avoided, because
     prandom_u32_max() uses a faster multiplication-based trick instead.

   - By using get_random_u16() or get_random_u8() in cases where the
     return value is intended to indeed be a u16 or a u8, we waste fewer
     batched random bytes, and hence have higher throughput.

  This series was originally done by hand while I was on an airplane
  without Internet. Later, Kees and I worked on retroactively figuring
  out what could be done with Coccinelle and what had to be done
  manually, and then we split things up based on that.

  So while this touches a lot of files, the actual amount of code that's
  hand fiddled is comfortably small"

* tag 'random-6.1-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  prandom: remove unused functions
  treewide: use get_random_bytes() when possible
  treewide: use get_random_u32() when possible
  treewide: use get_random_{u8,u16}() when possible, part 2
  treewide: use get_random_{u8,u16}() when possible, part 1
  treewide: use prandom_u32_max() when possible, part 2
  treewide: use prandom_u32_max() when possible, part 1
2022-10-16 15:27:07 -07:00
..
acl.c f2fs: port to vfs{g,u}id_t and associated helpers 2022-10-04 13:31:43 -07:00
acl.h vfs: add rcu argument to ->get_acl() callback 2021-08-18 22:08:24 +02:00
checkpoint.c f2fs: support recording stop_checkpoint reason into super_block 2022-10-04 13:31:44 -07:00
compress.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
data.c f2fs-for-6.1-rc1 2022-10-10 20:28:41 -07:00
debug.c f2fs: change to use atomic_t type form sbi.atomic_files 2022-10-07 12:57:26 -07:00
dir.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
extent_cache.c f2fs: code clean and fix a type error 2022-10-04 13:31:44 -07:00
f2fs.h f2fs-for-6.1-rc1 2022-10-10 20:28:41 -07:00
file.c f2fs-for-6.1-rc1 2022-10-10 20:28:41 -07:00
gc.c treewide: use prandom_u32_max() when possible, part 1 2022-10-11 17:42:55 -06:00
gc.h f2fs: remove redundant code for gc condition 2022-07-30 20:16:20 -07:00
hash.c f2fs: don't use casefolded comparison for "." and ".." 2022-05-17 11:19:23 -07:00
inline.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
inode.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
iostat.c f2fs: iostat: support accounting compressed IO 2022-08-29 21:15:51 -07:00
iostat.h f2fs: iostat: support accounting compressed IO 2022-08-29 21:15:51 -07:00
Kconfig f2fs: introduce F2FS_UNFAIR_RWSEM to support unfair rwsem 2022-03-04 09:15:53 -08:00
Makefile f2fs: separate out iostat feature 2021-08-23 10:25:51 -07:00
namei.c treewide: use get_random_u32() when possible 2022-10-11 17:42:58 -06:00
node.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
node.h f2fs: change the current atomic write way 2022-05-12 10:14:03 -07:00
recovery.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
segment.c treewide: use prandom_u32_max() when possible, part 1 2022-10-11 17:42:55 -06:00
segment.h f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
shrinker.c f2fs: avoid race condition for shrinker count 2020-12-03 00:59:26 -08:00
super.c f2fs-for-6.1-rc1 2022-10-10 20:28:41 -07:00
sysfs.c f2fs: introduce cp_status sysfs entry 2022-10-04 13:31:44 -07:00
verity.c - Alistair Popple has a series which addresses a race which causes page 2022-10-14 12:28:43 -07:00
xattr.c f2fs: support recording errors into superblock 2022-10-04 13:31:45 -07:00
xattr.h f2fs: code cleanup by removing ifdef macro surrounding 2020-05-26 18:56:10 -07:00