fs: exfat: Update exFAT driver

git-repository: https://github.com/namjaejeon/linux-exfat-oot.git
Date: Aug 8, 2024
Last commit: exfat: do not fallback to buffered write

Note:
Your device didn't come with exFat, you can't add extra official support, you can't include something that doesn't have it in stock, that's for Lineage (their device requirements) only.

SDFat is old, so let's move on to something more up-to-date and with better performance.

Signed-off-by: TogoFire <togofire@mailfence.com>
Change-Id: 40cf112

fs/exfat/.github/workflows/c-cpp.yml

@@ -2,31 +2,31 @@ name: linux-exfat-oot CI
 
 on:
   push:
-    branches: [ "for-kernel-version-from-4.1.0" ]
+    branches: [ "master" ]
   pull_request:
-    branches: [ "for-kernel-version-from-4.1.0" ]
+    branches: [ "master" ]
 
 jobs:
   build:
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Download the kernel
       run: |
         sudo apt-get update
         sudo apt-get install libelf-dev wget tar gzip python2.7
-        wget https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/linux-4.1.36.tar.gz
-        tar xf linux-4.1.36.tar.gz
-        mv linux-4.1.36 linux-stable
-        rm -rf linux-4.1.36.tar.gz
+        wget https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/linux-5.15.140.tar.gz
+        tar xf linux-5.15.140.tar.gz
+        mv linux-5.15.140 linux-stable
+        rm -rf linux-5.15.140.tar.gz
     - name: Prerequisite for xfstests testing
       run: |
         sudo apt-get install linux-headers-$(uname -r)
-        sudo apt-get install autoconf libtool pkg-config libnl-3-dev libnl-genl-3-dev
+        sudo apt-get install autoconf libtool pkg-config
         sudo apt-get install xfslibs-dev uuid-dev libtool-bin xfsprogs libgdbm-dev gawk fio attr libattr1-dev libacl1-dev libaio-dev
-        git clone --branch=exfat-next https://github.com/exfat-utils/exfat-utils
+        git clone --branch=exfat-next https://github.com/exfatprogs/exfatprogs
         git clone https://github.com/namjaejeon/exfat-testsuites
         export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
         export PATH=/usr/local/lib:$PATH
@@ -35,17 +35,14 @@ jobs:
     - name: Copy exfat source to kernel
       run: |
         mv linux-stable ../
-        mkdir ../linux-stable/fs/exfat
         cp -ar * ../linux-stable/fs/exfat/
-    - name: Compile with 4.1 kernel
+    - name: Compile with 5.15 kernel
       run: |
         cd ../linux-stable
         yes "" | make oldconfig > /dev/null
-        echo 'obj-$(CONFIG_EXFAT_FS) += exfat/' >> fs/Makefile
-        echo 'source "fs/exfat/Kconfig"' >> fs/Kconfig
         echo 'CONFIG_EXFAT_FS=m' >> .config
         echo 'CONFIG_EXFAT_DEFAULT_IOCHARSET="utf8"' >> .config
-        make -j$((`nproc`+1)) fs/exfat/exfat.ko
+        make KBUILD_MODPOST_WARN=1 KBUILD_MODPOST_NOFINAL=1 fs/exfat/exfat.ko
     - name: Run xfstests testsuite
       run: |
         cd ..
@@ -54,7 +51,7 @@ jobs:
         make > /dev/null
         sudo make install > /dev/null
         sudo insmod exfat.ko
-        cd exfat-utils
+        cd exfatprogs
         ./autogen.sh > /dev/null
         ./configure > /dev/null
         make -j$((`nproc`+1)) > /dev/null
@@ -87,6 +84,7 @@ jobs:
       run: |
         cd exfat-testsuites/
         tar xzvf xfstests-exfat.tgz > /dev/null
+        rm -f xfstests-exfat.tgz
         cd xfstests-exfat
         make -j$((`nproc`+1)) > /dev/null
         truncate -s 100G test.img
@@ -126,7 +124,6 @@ jobs:
         sudo ./check generic/124
         sudo ./check generic/127
         sudo ./check generic/129
-        sudo ./check generic/130
         sudo ./check generic/131
         sudo ./check generic/132
         sudo ./check generic/133

fs/exfat/README.md

@@ -1,6 +1,7 @@
 ## exFAT filesystem 
-This is the exfat filesystem for support from the linux 4.1 kernel
-to the latest kernel. 
+This is the exfat filesystem for support from the linux 5.15 kernel
+to the latest kernel. If you want to use exfat from 4.1 ~ 5.15 kernel,
+Please use #for-kernel-version-from-4.1.0 branch.
 
 ## Installing as a stand-alone module
 

fs/exfat/balloc.c

@@ -8,11 +8,7 @@
 #include <linux/slab.h>
 #include <linux/bitmap.h>
 #include <linux/buffer_head.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
 #include <linux/sched/signal.h>
-#else
-#include <linux/sched.h>
-#endif
 #include <linux/vmalloc.h>
 
 #include "exfat_raw.h"
@@ -30,10 +26,6 @@
 #error "BITS_PER_LONG not 32 or 64"
 #endif
 
-#ifndef ALIGN_DOWN
-#define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
-#endif 
-
 /*
  *  Allocation Bitmap Management Functions
  */
@@ -61,12 +53,8 @@ static int exfat_allocate_bitmap(struct super_block *sb,
 	}
 	sbi->map_sectors = ((need_map_size - 1) >>
 			(sb->s_blocksize_bits)) + 1;
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
 	sbi->vol_amap = kvmalloc_array(sbi->map_sectors,
 				sizeof(struct buffer_head *), GFP_KERNEL);
-#else
-	sbi->vol_amap = vmalloc(sbi->map_sectors * sizeof(struct buffer_head *));
-#endif
 	if (!sbi->vol_amap)
 		return -ENOMEM;
 

fs/exfat/cache.c

@@ -46,7 +46,11 @@ int exfat_cache_init(void)
 {
 	exfat_cachep = kmem_cache_create("exfat_cache",
 				sizeof(struct exfat_cache),
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 9, 0)
+				0, SLAB_RECLAIM_ACCOUNT,
+#else
 				0, SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
+#endif
 				exfat_cache_init_once);
 	if (!exfat_cachep)
 		return -ENOMEM;