linux-stable.git/fs/exfat, branch v6.2

Merge tag 'exfat-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat

2022-12-16T02:14:21+00:00

Pull exfat update from Namjae Jeon:

 - simplify and remove some redundant directory entry code

 - optimize the size of exfat_entry_set_cache and its allocation policy

 - improve the performance for creating files and directories

* tag 'exfat-for-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: reuse exfat_find_location() to simplify exfat_get_dentry_set()
  exfat: fix overflow in sector and cluster conversion
  exfat: remove i_size_write() from __exfat_truncate()
  exfat: remove argument 'size' from exfat_truncate()
  exfat: remove unnecessary arguments from exfat_find_dir_entry()
  exfat: remove unneeded codes from __exfat_rename()
  exfat: remove call ilog2() from exfat_readdir()
  exfat: replace magic numbers with Macros
  exfat: rename exfat_free_dentry_set() to exfat_put_dentry_set()
  exfat: move exfat_entry_set_cache from heap to stack
  exfat: support dynamic allocate bh for exfat_entry_set_cache
  exfat: reduce the size of exfat_entry_set_cache
  exfat: hint the empty entry which at the end of cluster chain
  exfat: simplify empty entry hint

exfat: reuse exfat_find_location() to simplify exfat_get_dentry_set()

2022-12-13T11:17:16+00:00

In exfat_get_dentry_set(), part of the code is the same as
exfat_find_location(), reuse exfat_find_location() to simplify
exfat_get_dentry_set().

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: fix overflow in sector and cluster conversion

2022-12-13T11:17:11+00:00

According to the exFAT specification, there are at most 2^32-11
clusters in a volume. so using 'int' is not enough for cluster
index, the return value type of exfat_sector_to_cluster() should
be 'unsigned int'.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

extfat: remove ->writepage

2022-12-12T02:12:17+00:00

Patch series "start removing writepage instances v2".

The VM doesn't need or want ->writepage for writeback and is fine with
just having ->writepages as long as ->migrate_folio is implemented.

This series removes all ->writepage instances that use
block_write_full_page directly and also have a plain mpage_writepages
based ->writepages.


This patch (of 7):

->writepage is a very inefficient method to write back data, and only used
through write_cache_pages or a a fallback when no ->migrate_folio method
is present.

Set ->migrate_folio to the generic buffer_head based helper, and remove
the ->writepage implementation.

Link: https://lkml.kernel.org/r/20221202102644.770505-1-hch@lst.de
Link: https://lkml.kernel.org/r/20221202102644.770505-2-hch@lst.de
Signed-off-by: Christoph Hellwig 
Acked-by: Namjae Jeon 
Acked-by: Johannes Weiner 
Cc: Bob Copeland 
Cc: Dave Kleikamp 
Cc: Jan Kara 
Cc: Mikulas Patocka 
Cc: OGAWA Hirofumi 
Cc: Sungjong Seo 
Signed-off-by: Andrew Morton

exfat: remove i_size_write() from __exfat_truncate()

2022-12-12T02:02:51+00:00

The file/directory size is updated into inode by i_size_write()
before __exfat_truncate() is called, so it is redundant to
re-update by i_size_write() in __exfat_truncate().

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: remove argument 'size' from exfat_truncate()

2022-12-12T02:02:51+00:00

argument 'size' is not used in exfat_truncate(), remove it.

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: remove unnecessary arguments from exfat_find_dir_entry()

2022-12-12T02:02:50+00:00

This commit removes argument 'num_entries' and 'type' from
exfat_find_dir_entry().

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: remove unneeded codes from __exfat_rename()

2022-12-12T02:02:50+00:00

The code gets the dentry, but the dentry is not used, remove the
code.

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: remove call ilog2() from exfat_readdir()

2022-12-12T02:02:50+00:00

There is no need to call ilog2() for the conversions between
cluster and dentry in exfat_readdir(), because these conversions
can be replaced with EXFAT_DEN_TO_CLU()/EXFAT_CLU_TO_DEN().

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon

exfat: replace magic numbers with Macros

2022-12-12T02:02:50+00:00

Code refinement, no functional changes.

Signed-off-by: Yuezhang Mo 
Reviewed-by: Andy Wu 
Reviewed-by: Aoyama Wataru 
Reviewed-by: Sungjong Seo 
Signed-off-by: Namjae Jeon