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Merge branch 'master' of https://github.com/namjaejeon/linux-exfat-oot into android13-5.4-lahaina

Browse Source 
* 'master' of https://github.com/namjaejeon/linux-exfat-oot:
  exfat: add necessary header for vmalloc
  exfat: release s_lock before calling dir_emit()
  exfat: check if filename entries exceeds max filename length
  exfat: github action: make space for running xfstests
  exfat: use kvmalloc_array/kvfree instead of kmalloc_array/kfree
  exfat: splice: Use filemap_splice_read() instead of generic_file_splice_read()
  exfat: fs: build the legacy direct I/O code conditionally
  exfat: fs: port ->rename() to pass mnt_idmap
  exfat: fs: port ->mkdir() to pass mnt_idmap
  exfat: fs: port ->create() to pass mnt_idmap
  exfat: fs: port ->getattr() to pass mnt_idmap
  exfat: fs: port ->setattr() to pass mnt_idmap
  exfat: fix the newly allocated clusters are not freed in error handling
  exfat: don't print error log in normal case
  exfat: remove unneeded code from exfat_alloc_cluster()
  exfat: remove ->writepage
  exfat: handle unreconized benign secondary entries
  exfat: fix inode->i_blocks for non-512 byte sector size device
  exfat: redefine DIR_DELETED as the bad cluster number
  exfat: fix reporting fs error when reading dir beyond EOF
  exfat: fix unexpected EOF while reading dir
  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: remove generic/286
  exfat: fix python package installation failure
  exfat: github actions: add apt-get update command
  exfat: treewide: use get_random_u32() when possible
  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: add SECTOR_SIZE macro
  exfat: hint the empty entry which at the end of cluster chain
  exfat: simplify empty entry hint
  exfat: add auto-test using github action
  exfat: remove travis-CI test
  exfat: release 6.0.0 version
  exfat: fix overflow for large capacity partition
  exfat: add auto build-test and simple stability test using travis-CI
  exfat: Drop superfluous new line for error messages
  exfat: Downgrade ENAMETOOLONG error message to debug messages
  exfat: Expand exfat_err() and co directly to pr_*() macro
  exfat: Define NLS_NAME_* as bit flags explicitly
  exfat: Return ENAMETOOLONG consistently for oversized paths
  exfat: simplified by using round_up()
  fs: Convert mpage_readpage to mpage_read_folio
  fs: Remove flags parameter from aops->write_begin
  fs: Remove aop flags parameter from cont_write_begin()
  block: add a bdev_discard_granularity helper
  block: remove QUEUE_FLAG_DISCARD
  exfat: remove duplicate write inode for extending dir/file
  exfat: remove duplicate write inode for truncating file
  exfat: reuse __exfat_write_inode() to update directory entry
  exfat: use updated exfat_chain directly during renaming

Change-Id: Ib68d90de9ea596296407f446fa611525034db193
This commit is contained in:
Michael Bestas 2023-08-25 12:15:07 +03:00
commit 1cbc6feae2
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GPG Key ID: CC95044519BE6669
15 changed files with 704 additions and 493 deletions
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196
fs/exfat/.github/workflows/c-cpp.yml vendored Normal file
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@ -0,0 +1,196 @@
name: linux-exfat-oot CI
on:
push:
branches: [ "master" ]
pull_request:
branches: [ "master" ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- 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
- name: Prerequisite for xfstests testing
run: |
sudo apt-get install linux-headers-$(uname -r)
sudo apt-get install autoconf libtool pkg-config libnl-3-dev libnl-genl-3-dev
sudo apt-get install xfslibs-dev uuid-dev libtool-bin xfsprogs libgdbm-dev gawk fio attr libattr1-dev libacl1-dev libaio-dev
git clone --branch=exfat-next https://github.com/exfat-utils/exfat-utils
git clone https://github.com/namjaejeon/exfat-testsuites
export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
export PATH=/usr/local/lib:$PATH
sudo useradd fsgqa
sudo useradd 123456-fsgqa
- name: Copy exfat source to kernel
run: |
mv linux-stable ../
mkdir ../linux-stable/fs/exfat
cp -ar * ../linux-stable/fs/exfat/
- name: Compile with 4.1 kernel
run: |
cd ../linux-stable
yes "" | make oldconfig > /dev/null
echo 'obj-$(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$((`nproc`+1)) fs/exfat/exfat.ko
- name: Run xfstests testsuite
run: |
cd ../linux-exfat-oot
make > /dev/null
sudo make install > /dev/null
sudo insmod exfat.ko
cd exfat-utils
./autogen.sh > /dev/null
./configure > /dev/null
make -j$((`nproc`+1)) > /dev/null
sudo make install > /dev/null
cd ..
sudo mkdir -p /mnt/scratch
sudo mkdir -p /mnt/test
sudo mkdir -p full_test
- name: create file/director test
run: |
truncate -s 10G full_test.img
sudo losetup /dev/loop22 full_test.img
sudo mkfs.exfat /dev/loop22
sudo mount -t exfat /dev/loop22 ./full_test/
cd full_test/
i=1;while [ $i -le 10000 ];do sudo touch file$i;if [ $? != 0 ]; then exit 1; fi; i=$(($i + 1));done
sync
sudo fsck.exfat /dev/loop22
sudo rm -rf *
i=1;while [ $i -le 10000 ];do sudo mkdir file$i;if [ $? != 0 ]; then exit 1; fi; i=$(($i + 1));done
sync
sudo rm -rf *
sudo fsck.exfat /dev/loop22
cd ..
sudo umount ./full_test/
sudo fsck.exfat /dev/loop22
sudo losetup -d /dev/loop22
rm full_test.img
- name: xfstest tests
run: |
cd exfat-testsuites/
tar xzvf xfstests-exfat.tgz > /dev/null
cd xfstests-exfat
make -j$((`nproc`+1)) > /dev/null
truncate -s 100G test.img
truncate -s 100G scratch.img
sudo losetup /dev/loop20 test.img
sudo losetup /dev/loop21 scratch.img
sudo mkfs.exfat /dev/loop20
sudo mkfs.exfat /dev/loop21
sudo ./check generic/001
sudo ./check generic/006
sudo ./check generic/007
sudo ./check generic/011
sudo ./check generic/013
sudo ./check generic/014
sudo ./check generic/028
sudo ./check generic/029
sudo ./check generic/030
sudo ./check generic/034
sudo ./check generic/035
sudo ./check generic/036
sudo ./check generic/069
sudo ./check generic/073
sudo ./check generic/074
sudo ./check generic/075
sudo ./check generic/076
sudo ./check generic/080
sudo ./check generic/084
sudo ./check generic/091
sudo ./check generic/095
sudo ./check generic/098
sudo ./check generic/100
sudo ./check generic/112
sudo ./check generic/113
sudo ./check generic/114
sudo ./check generic/120
sudo ./check generic/123
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
sudo ./check generic/135
sudo ./check generic/141
sudo ./check generic/169
sudo ./check generic/198
sudo ./check generic/207
sudo ./check generic/208
sudo ./check generic/209
sudo ./check generic/210
sudo ./check generic/211
sudo ./check generic/212
sudo ./check generic/215
sudo losetup -d /dev/loop20
sudo losetup -d /dev/loop21
rm test.img
rm scratch.img
truncate -s 100G test.img
truncate -s 100G scratch.img
sudo losetup /dev/loop20 test.img
sudo losetup /dev/loop21 scratch.img
sudo mkfs.exfat /dev/loop20
sudo mkfs.exfat /dev/loop21
sudo ./check generic/221
sudo ./check generic/239
sudo ./check generic/240
sudo ./check generic/241
sudo ./check generic/245
sudo ./check generic/246
sudo ./check generic/247
sudo ./check generic/248
sudo ./check generic/249
sudo ./check generic/257
sudo ./check generic/260
sudo ./check generic/263
sudo ./check generic/285
sudo ./check generic/288
sudo ./check generic/308
sudo ./check generic/309
sudo ./check generic/310
sudo ./check generic/313
sudo ./check generic/323
sudo ./check generic/325
sudo ./check generic/338
sudo ./check generic/339
sudo ./check generic/340
sudo ./check generic/344
sudo ./check generic/345
sudo ./check generic/346
sudo ./check generic/354
sudo ./check generic/376
sudo ./check generic/393
sudo ./check generic/394
sudo ./check generic/405
sudo ./check generic/406
sudo ./check generic/409
sudo ./check generic/410
sudo ./check generic/411
sudo ./check generic/412
sudo ./check generic/418
sudo ./check generic/428
sudo ./check generic/437
sudo ./check generic/438
sudo ./check generic/441
sudo ./check generic/443
sudo ./check generic/448
sudo ./check generic/450
sudo ./check generic/451
sudo ./check generic/452

65
fs/exfat/.travis_cmd_wrapper.pl
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@ -1,65 +0,0 @@
#!/usr/bin/perl
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Copyright (C) 2019 Samsung Electronics Co., Ltd.
#
use strict;
sub tweak_sysctl()
{
`sudo sysctl kernel.hardlockup_panic=0`;
`sudo sysctl kernel.hung_task_panic=0`;
`sudo sysctl kernel.panic=128`;
`sudo sysctl kernel.panic_on_io_nmi=0`;
`sudo sysctl kernel.panic_on_oops=0`;
`sudo sysctl kernel.panic_on_rcu_stall=0`;
`sudo sysctl kernel.panic_on_unrecovered_nmi=0`;
`sudo sysctl kernel.panic_on_warn=0`;
`sudo sysctl kernel.softlockup_panic=0`;
`sudo sysctl kernel.unknown_nmi_panic=0`;
}
sub execute($$)
{
my $cmd = shift;
my $timeout = shift;
my $output = "Timeout";
my $status = 1;
$timeout = 8 * 60 if (!defined $timeout);
tweak_sysctl();
eval {
local $SIG{ALRM} = sub {
print "TIMEOUT:\n";
system("top -n 1"), print "top\n";
system("free"), print "free\n";
system("dmesg"), print "dmesg\n";
die "Timeout\n";
};
print "Executing $cmd with timeout $timeout\n";
alarm $timeout;
$output = `$cmd`;
$status = $?;
alarm 0;
print $output."\n";
print "Finished: status $status\n";
};
if ($@) {
die unless $@ eq "Timeout\n";
}
}
if (! defined $ARGV[0]) {
print "Usage:\n\t./.travis_cmd_wrapper.pl command [timeout seconds]\n";
exit 1;
}
execute($ARGV[0], $ARGV[1]);

37
fs/exfat/.travis_get_mainline_kernel
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@ -1,37 +0,0 @@
#!/bin/sh
#
# A simple script we are using to get the latest mainline kernel
# tar ball
#
wget https://www.kernel.org/releases.json
if [ $? -ne 0 ]; then
echo "Could not download kernel.org/releases.json"
exit 1
fi
VER=$(cat releases.json | python2.7 -c "import sys, json; print json.load(sys.stdin)['latest_stable']['version']")
if [ $? -ne 0 ]; then
echo "Could not parse release.json"
exit 1
fi
if [ "z$VER" = "z" ]; then
echo "Could not determine latest release version"
exit 1
fi
wget https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-"$VER".tar.gz
if [ $? -ne 0 ]; then
echo "Could not download $VER kernel version"
exit 1
fi
tar xf linux-"$VER".tar.gz
if [ $? -ne 0 ]; then
echo "Could not untar kernel tar ball"
exit 1
fi
mv linux-"$VER" linux

1
fs/exfat/Kconfig
View File

@ -3,6 +3,7 @@
config EXFAT_FS
tristate "exFAT filesystem support"
select NLS
select LEGACY_DIRECT_IO
help
This allows you to mount devices formatted with the exFAT file system.
exFAT is typically used on SD-Cards or USB sticks.

11
fs/exfat/balloc.c
View File

@ -12,6 +12,7 @@
#else
#include <linux/sched.h>
#endif
#include <linux/vmalloc.h>
#include "exfat_raw.h"
#include "exfat_fs.h"
@ -75,8 +76,12 @@ static int exfat_allocate_bitmap(struct super_block *sb,
}
sbi->map_sectors = ((need_map_size - 1) >>
(sb->s_blocksize_bits)) + 1;
sbi->vol_amap = kmalloc_array(sbi->map_sectors,
#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;
@ -90,7 +95,7 @@ static int exfat_allocate_bitmap(struct super_block *sb,
while (j < i)
brelse(sbi->vol_amap[j++]);
kfree(sbi->vol_amap);
kvfree(sbi->vol_amap);
sbi->vol_amap = NULL;
return -EIO;
}
@ -144,7 +149,7 @@ void exfat_free_bitmap(struct exfat_sb_info *sbi)
for (i = 0; i < sbi->map_sectors; i++)
__brelse(sbi->vol_amap[i]);
kfree(sbi->vol_amap);
kvfree(sbi->vol_amap);
}
int exfat_set_bitmap(struct inode *inode, unsigned int clu, bool sync)

302
fs/exfat/dir.c
View File

@ -30,15 +30,16 @@ static int exfat_extract_uni_name(struct exfat_dentry *ep,
}
static void exfat_get_uniname_from_ext_entry(struct super_block *sb,
static int exfat_get_uniname_from_ext_entry(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned short *uniname)
{
int i;
struct exfat_entry_set_cache *es;
int i, err;
struct exfat_entry_set_cache es;
unsigned int uni_len = 0, len;
es = exfat_get_dentry_set(sb, p_dir, entry, ES_ALL_ENTRIES);
if (!es)
return;
err = exfat_get_dentry_set(&es, sb, p_dir, entry, ES_ALL_ENTRIES);
if (err)
return err;
/*
* First entry : file entry
@ -46,24 +47,28 @@ static void exfat_get_uniname_from_ext_entry(struct super_block *sb,
* Third entry : first file-name entry
* So, the index of first file-name dentry should start from 2.
*/
for (i = 2; i < es->num_entries; i++) {
struct exfat_dentry *ep = exfat_get_dentry_cached(es, i);
for (i = ES_IDX_FIRST_FILENAME; i < es.num_entries; i++) {
struct exfat_dentry *ep = exfat_get_dentry_cached(&es, i);
/* end of name entry */
if (exfat_get_entry_type(ep) != TYPE_EXTEND)
break;
exfat_extract_uni_name(ep, uniname);
len = exfat_extract_uni_name(ep, uniname);
uni_len += len;
if (len != EXFAT_FILE_NAME_LEN || uni_len >= MAX_NAME_LENGTH)
break;
uniname += EXFAT_FILE_NAME_LEN;
}
exfat_free_dentry_set(es, false);
exfat_put_dentry_set(&es, false);
return 0;
}
/* read a directory entry from the opened directory */
static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_entry *dir_entry)
{
int i, dentries_per_clu, dentries_per_clu_bits = 0, num_ext;
int i, dentries_per_clu, num_ext, err;
unsigned int type, clu_offset, max_dentries;
struct exfat_chain dir, clu;
struct exfat_uni_name uni_name;
@ -85,11 +90,10 @@ static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_ent
EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
dentries_per_clu = sbi->dentries_per_clu;
dentries_per_clu_bits = ilog2(dentries_per_clu);
max_dentries = (unsigned int)min_t(u64, MAX_EXFAT_DENTRIES,
(u64)sbi->num_clusters << dentries_per_clu_bits);
(u64)EXFAT_CLU_TO_DEN(sbi->num_clusters, sbi));
clu_offset = dentry >> dentries_per_clu_bits;
clu_offset = EXFAT_DEN_TO_CLU(dentry, sbi);
exfat_chain_dup(&clu, &dir);
if (clu.flags == ALLOC_NO_FAT_CHAIN) {
@ -103,7 +107,7 @@ static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_ent
clu.dir = ei->hint_bmap.clu;
}
while (clu_offset > 0) {
while (clu_offset > 0 && clu.dir != EXFAT_EOF_CLUSTER) {
if (exfat_get_next_cluster(sb, &(clu.dir)))
return -EIO;
@ -149,8 +153,12 @@ static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_ent
0);
*uni_name.name = 0x0;
exfat_get_uniname_from_ext_entry(sb, &clu, i,
err = exfat_get_uniname_from_ext_entry(sb, &clu, i,
uni_name.name);
if (err) {
brelse(bh);
continue;
}
exfat_utf16_to_nls(sb, &uni_name,
dir_entry->namebuf.lfn,
dir_entry->namebuf.lfnbuf_len);
@ -164,7 +172,7 @@ static int exfat_readdir(struct inode *inode, loff_t *cpos, struct exfat_dir_ent
dir_entry->entry = dentry;
brelse(bh);
ei->hint_bmap.off = dentry >> dentries_per_clu_bits;
ei->hint_bmap.off = EXFAT_DEN_TO_CLU(dentry, sbi);
ei->hint_bmap.clu = clu.dir;
*cpos = EXFAT_DEN_TO_B(dentry + 1 + num_ext);
@ -211,7 +219,10 @@ static void exfat_free_namebuf(struct exfat_dentry_namebuf *nb)
exfat_init_namebuf(nb);
}
/* skip iterating emit_dots when dir is empty */
/*
* Before calling dir_emit*(), sbi->s_lock should be released
* because page fault can occur in dir_emit*().
*/
#define ITER_POS_FILLED_DOTS (2)
static int exfat_iterate(struct file *filp, struct dir_context *ctx)
{
@ -226,35 +237,33 @@ static int exfat_iterate(struct file *filp, struct dir_context *ctx)
int err = 0, fake_offset = 0;
exfat_init_namebuf(nb);
mutex_lock(&EXFAT_SB(sb)->s_lock);
cpos = ctx->pos;
if (!dir_emit_dots(filp, ctx))
goto unlock;
goto out;
if (ctx->pos == ITER_POS_FILLED_DOTS) {
cpos = 0;
fake_offset = 1;
}
if (cpos & (DENTRY_SIZE - 1)) {
err = -ENOENT;
goto unlock;
}
cpos = round_up(cpos, DENTRY_SIZE);
/* name buffer should be allocated before use */
err = exfat_alloc_namebuf(nb);
if (err)
goto unlock;
goto out;
get_new:
mutex_lock(&EXFAT_SB(sb)->s_lock);
if (ei->flags == ALLOC_NO_FAT_CHAIN && cpos >= i_size_read(inode))
goto end_of_dir;
err = exfat_readdir(inode, &cpos, &de);
if (err) {
/*
* At least we tried to read a sector. Move cpos to next sector
* position (should be aligned).
* At least we tried to read a sector.
* Move cpos to next sector position (should be aligned).
*/
if (err == -EIO) {
cpos += 1 << (sb->s_blocksize_bits);
@ -277,16 +286,10 @@ get_new:
inum = iunique(sb, EXFAT_ROOT_INO);
}
/*
* Before calling dir_emit(), sb_lock should be released.
* Because page fault can occur in dir_emit() when the size
* of buffer given from user is larger than one page size.
*/
mutex_unlock(&EXFAT_SB(sb)->s_lock);
if (!dir_emit(ctx, nb->lfn, strlen(nb->lfn), inum,
(de.attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
goto out_unlocked;
mutex_lock(&EXFAT_SB(sb)->s_lock);
goto out;
ctx->pos = cpos;
goto get_new;
@ -294,9 +297,8 @@ end_of_dir:
if (!cpos && fake_offset)
cpos = ITER_POS_FILLED_DOTS;
ctx->pos = cpos;
unlock:
mutex_unlock(&EXFAT_SB(sb)->s_lock);
out_unlocked:
out:
/*
* To improve performance, free namebuf after unlock sb_lock.
* If namebuf is not allocated, this function do nothing
@ -338,7 +340,7 @@ int exfat_calc_num_entries(struct exfat_uni_name *p_uniname)
return -EINVAL;
/* 1 file entry + 1 stream entry + name entries */
return ((len - 1) / EXFAT_FILE_NAME_LEN + 3);
return ES_ENTRY_NUM(len);
}
unsigned int exfat_get_entry_type(struct exfat_dentry *ep)
@ -381,6 +383,12 @@ unsigned int exfat_get_entry_type(struct exfat_dentry *ep)
return TYPE_ACL;
return TYPE_CRITICAL_SEC;
}
if (ep->type == EXFAT_VENDOR_EXT)
return TYPE_VENDOR_EXT;
if (ep->type == EXFAT_VENDOR_ALLOC)
return TYPE_VENDOR_ALLOC;
return TYPE_BENIGN_SEC;
}
@ -534,6 +542,25 @@ release_fbh:
return ret;
}
static void exfat_free_benign_secondary_clusters(struct inode *inode,
struct exfat_dentry *ep)
{
struct super_block *sb = inode->i_sb;
struct exfat_chain dir;
unsigned int start_clu =
le32_to_cpu(ep->dentry.generic_secondary.start_clu);
u64 size = le64_to_cpu(ep->dentry.generic_secondary.size);
unsigned char flags = ep->dentry.generic_secondary.flags;
if (!(flags & ALLOC_POSSIBLE) || !start_clu || !size)
return;
exfat_chain_set(&dir, start_clu,
EXFAT_B_TO_CLU_ROUND_UP(size, EXFAT_SB(sb)),
flags);
exfat_free_cluster(inode, &dir);
}
int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
int entry, int num_entries, struct exfat_uni_name *p_uniname)
{
@ -566,6 +593,9 @@ int exfat_init_ext_entry(struct inode *inode, struct exfat_chain *p_dir,
if (!ep)
return -EIO;
if (exfat_get_entry_type(ep) & TYPE_BENIGN_SEC)
exfat_free_benign_secondary_clusters(inode, ep);
exfat_init_name_entry(ep, uniname);
exfat_update_bh(bh, sync);
brelse(bh);
@ -589,6 +619,9 @@ int exfat_remove_entries(struct inode *inode, struct exfat_chain *p_dir,
if (!ep)
return -EIO;
if (exfat_get_entry_type(ep) & TYPE_BENIGN_SEC)
exfat_free_benign_secondary_clusters(inode, ep);
exfat_set_entry_type(ep, TYPE_DELETED);
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
@ -603,18 +636,18 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es)
unsigned short chksum = 0;
struct exfat_dentry *ep;
for (i = 0; i < es->num_entries; i++) {
for (i = ES_IDX_FILE; i < es->num_entries; i++) {
ep = exfat_get_dentry_cached(es, i);
chksum = exfat_calc_chksum16(ep, DENTRY_SIZE, chksum,
chksum_type);
chksum_type = CS_DEFAULT;
}
ep = exfat_get_dentry_cached(es, 0);
ep = exfat_get_dentry_cached(es, ES_IDX_FILE);
ep->dentry.file.checksum = cpu_to_le16(chksum);
es->modified = true;
}
int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync)
{
int i, err = 0;
@ -626,7 +659,10 @@ int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync)
bforget(es->bh[i]);
else
brelse(es->bh[i]);
kfree(es);
if (IS_DYNAMIC_ES(es))
kfree(es->bh);
return err;
}
@ -754,6 +790,7 @@ enum exfat_validate_dentry_mode {
ES_MODE_GET_STRM_ENTRY,
ES_MODE_GET_NAME_ENTRY,
ES_MODE_GET_CRITICAL_SEC_ENTRY,
ES_MODE_GET_BENIGN_SEC_ENTRY,
};
static bool exfat_validate_entry(unsigned int type,
@ -767,36 +804,33 @@ static bool exfat_validate_entry(unsigned int type,
if (type != TYPE_FILE && type != TYPE_DIR)
return false;
*mode = ES_MODE_GET_FILE_ENTRY;
return true;
break;
case ES_MODE_GET_FILE_ENTRY:
if (type != TYPE_STREAM)
return false;
*mode = ES_MODE_GET_STRM_ENTRY;
return true;
break;
case ES_MODE_GET_STRM_ENTRY:
if (type != TYPE_EXTEND)
return false;
*mode = ES_MODE_GET_NAME_ENTRY;
return true;
break;
case ES_MODE_GET_NAME_ENTRY:
if (type == TYPE_STREAM)
if (type & TYPE_BENIGN_SEC)
*mode = ES_MODE_GET_BENIGN_SEC_ENTRY;
else if (type != TYPE_EXTEND)
return false;
if (type != TYPE_EXTEND) {
if (!(type & TYPE_CRITICAL_SEC))
break;
case ES_MODE_GET_BENIGN_SEC_ENTRY:
/* Assume unreconized benign secondary entry */
if (!(type & TYPE_BENIGN_SEC))
return false;
*mode = ES_MODE_GET_CRITICAL_SEC_ENTRY;
}
return true;
case ES_MODE_GET_CRITICAL_SEC_ENTRY:
if (type == TYPE_EXTEND || type == TYPE_STREAM)
return false;
if ((type & TYPE_CRITICAL_SEC) != TYPE_CRITICAL_SEC)
return false;
return true;
break;
default:
WARN_ON_ONCE(1);
return false;
}
return true;
}
struct exfat_dentry *exfat_get_dentry_cached(
@ -823,14 +857,14 @@ struct exfat_dentry *exfat_get_dentry_cached(
* pointer of entry set on success,
* NULL on failure.
*/
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned int type)
int exfat_get_dentry_set(struct exfat_entry_set_cache *es,
struct super_block *sb, struct exfat_chain *p_dir, int entry,
unsigned int type)
{
int ret, i, num_bh;
unsigned int off, byte_offset, clu = 0;
unsigned int off;
sector_t sec;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_entry_set_cache *es;
struct exfat_dentry *ep;
int num_entries;
enum exfat_validate_dentry_mode mode = ES_MODE_STARTED;
@ -838,52 +872,51 @@ struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
if (p_dir->dir == DIR_DELETED) {
exfat_err(sb, "access to deleted dentry");
return NULL;
return -EIO;
}
byte_offset = EXFAT_DEN_TO_B(entry);
ret = exfat_walk_fat_chain(sb, p_dir, byte_offset, &clu);
ret = exfat_find_location(sb, p_dir, entry, &sec, &off);
if (ret)
return NULL;
return ret;
es = kzalloc(sizeof(*es), GFP_KERNEL);
if (!es)
return NULL;
memset(es, 0, sizeof(*es));
es->sb = sb;
es->modified = false;
/* byte offset in cluster */
byte_offset = EXFAT_CLU_OFFSET(byte_offset, sbi);
/* byte offset in sector */
off = EXFAT_BLK_OFFSET(byte_offset, sb);
es->start_off = off;
/* sector offset in cluster */
sec = EXFAT_B_TO_BLK(byte_offset, sb);
sec += exfat_cluster_to_sector(sbi, clu);
es->bh = es->__bh;
bh = sb_bread(sb, sec);
if (!bh)
goto free_es;
return -EIO;
es->bh[es->num_bh++] = bh;
ep = exfat_get_dentry_cached(es, 0);
ep = exfat_get_dentry_cached(es, ES_IDX_FILE);
if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
goto free_es;
goto put_es;
num_entries = type == ES_ALL_ENTRIES ?
ep->dentry.file.num_ext + 1 : type;
es->num_entries = num_entries;
num_bh = EXFAT_B_TO_BLK_ROUND_UP(off + num_entries * DENTRY_SIZE, sb);
if (num_bh > ARRAY_SIZE(es->__bh)) {
es->bh = kmalloc_array(num_bh, sizeof(*es->bh), GFP_KERNEL);
if (!es->bh) {
brelse(bh);
return -ENOMEM;
}
es->bh[0] = bh;
}
for (i = 1; i < num_bh; i++) {
/* get the next sector */
if (exfat_is_last_sector_in_cluster(sbi, sec)) {
unsigned int clu = exfat_sector_to_cluster(sbi, sec);
if (p_dir->flags == ALLOC_NO_FAT_CHAIN)
clu++;
else if (exfat_get_next_cluster(sb, &clu))
goto free_es;
goto put_es;
sec = exfat_cluster_to_sector(sbi, clu);
} else {
sec++;
@ -891,21 +924,51 @@ struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
bh = sb_bread(sb, sec);
if (!bh)
goto free_es;
goto put_es;
es->bh[es->num_bh++] = bh;
}
/* validate cached dentries */
for (i = 1; i < num_entries; i++) {
for (i = ES_IDX_STREAM; i < num_entries; i++) {
ep = exfat_get_dentry_cached(es, i);
if (!exfat_validate_entry(exfat_get_entry_type(ep), &mode))
goto free_es;
goto put_es;
}
return es;
return 0;
free_es:
exfat_free_dentry_set(es, false);
return NULL;
put_es:
exfat_put_dentry_set(es, false);
return -EIO;
}
static inline void exfat_reset_empty_hint(struct exfat_hint_femp *hint_femp)
{
hint_femp->eidx = EXFAT_HINT_NONE;
hint_femp->count = 0;
}
static inline void exfat_set_empty_hint(struct exfat_inode_info *ei,
struct exfat_hint_femp *candi_empty, struct exfat_chain *clu,
int dentry, int num_entries, int entry_type)
{
if (ei->hint_femp.eidx == EXFAT_HINT_NONE ||
ei->hint_femp.eidx > dentry) {
int total_entries = EXFAT_B_TO_DEN(i_size_read(&ei->vfs_inode));
if (candi_empty->count == 0) {
candi_empty->cur = *clu;
candi_empty->eidx = dentry;
}
if (entry_type == TYPE_UNUSED)
candi_empty->count += total_entries - dentry;
else
candi_empty->count++;
if (candi_empty->count == num_entries ||
candi_empty->count + candi_empty->eidx == total_entries)
ei->hint_femp = *candi_empty;
}
}
enum {
@ -928,17 +991,21 @@ enum {
*/
int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
int num_entries, unsigned int type, struct exfat_hint *hint_opt)
struct exfat_hint *hint_opt)
{
int i, rewind = 0, dentry = 0, end_eidx = 0, num_ext = 0, len;
int order, step, name_len = 0;
int dentries_per_clu, num_empty = 0;
int dentries_per_clu;
unsigned int entry_type;
unsigned short *uniname = NULL;
struct exfat_chain clu;
struct exfat_hint *hint_stat = &ei->hint_stat;
struct exfat_hint_femp candi_empty;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
int num_entries = exfat_calc_num_entries(p_uniname);
if (num_entries < 0)
return num_entries;
dentries_per_clu = sbi->dentries_per_clu;
@ -950,10 +1017,13 @@ int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
end_eidx = dentry;
}
candi_empty.eidx = EXFAT_HINT_NONE;
exfat_reset_empty_hint(&ei->hint_femp);
rewind:
order = 0;
step = DIRENT_STEP_FILE;
exfat_reset_empty_hint(&candi_empty);
while (clu.dir != EXFAT_EOF_CLUSTER) {
i = dentry & (dentries_per_clu - 1);
for (; i < dentries_per_clu; i++, dentry++) {
@ -973,26 +1043,9 @@ rewind:
entry_type == TYPE_DELETED) {
step = DIRENT_STEP_FILE;
num_empty++;
if (candi_empty.eidx == EXFAT_HINT_NONE &&
num_empty == 1) {
exfat_chain_set(&candi_empty.cur,
clu.dir, clu.size, clu.flags);
}
if (candi_empty.eidx == EXFAT_HINT_NONE &&
num_empty >= num_entries) {
candi_empty.eidx =
dentry - (num_empty - 1);
WARN_ON(candi_empty.eidx < 0);
candi_empty.count = num_empty;
if (ei->hint_femp.eidx ==
EXFAT_HINT_NONE ||
candi_empty.eidx <=
ei->hint_femp.eidx)
ei->hint_femp = candi_empty;
}
exfat_set_empty_hint(ei, &candi_empty, &clu,
dentry, num_entries,
entry_type);
brelse(bh);
if (entry_type == TYPE_UNUSED)
@ -1000,17 +1053,14 @@ rewind:
continue;
}
num_empty = 0;
candi_empty.eidx = EXFAT_HINT_NONE;
exfat_reset_empty_hint(&candi_empty);
if (entry_type == TYPE_FILE || entry_type == TYPE_DIR) {
step = DIRENT_STEP_FILE;
hint_opt->clu = clu.dir;
hint_opt->eidx = i;
if (type == TYPE_ALL || type == entry_type) {
num_ext = ep->dentry.file.num_ext;
step = DIRENT_STEP_STRM;
}
brelse(bh);
continue;
}
@ -1041,7 +1091,8 @@ rewind:
if (entry_type == TYPE_EXTEND) {
unsigned short entry_uniname[16], unichar;
if (step != DIRENT_STEP_NAME) {
if (step != DIRENT_STEP_NAME ||
name_len >= MAX_NAME_LENGTH) {
step = DIRENT_STEP_FILE;
continue;
}
@ -1101,12 +1152,19 @@ not_found:
rewind = 1;
dentry = 0;
clu.dir = p_dir->dir;
/* reset empty hint */
num_empty = 0;
candi_empty.eidx = EXFAT_HINT_NONE;
goto rewind;
}
/*
* set the EXFAT_EOF_CLUSTER flag to avoid search
* from the beginning again when allocated a new cluster
*/
if (ei->hint_femp.eidx == EXFAT_HINT_NONE) {
ei->hint_femp.cur.dir = EXFAT_EOF_CLUSTER;
ei->hint_femp.eidx = p_dir->size * dentries_per_clu;
ei->hint_femp.count = 0;
}
/* initialized hint_stat */
hint_stat->clu = p_dir->dir;
hint_stat->eidx = 0;
@ -1154,10 +1212,8 @@ int exfat_count_ext_entries(struct super_block *sb, struct exfat_chain *p_dir,
type = exfat_get_entry_type(ext_ep);
brelse(bh);
if (type == TYPE_EXTEND || type == TYPE_STREAM)
if (type & TYPE_CRITICAL_SEC || type & TYPE_BENIGN_SEC)
count++;
else
break;
}
return count;
}

93
fs/exfat/exfat_fs.h
View File

@ -10,6 +10,11 @@
#include <linux/fs.h>
#include <linux/ratelimit.h>
#include <linux/nls.h>
#include <linux/blkdev.h>
#ifndef SECTOR_SIZE
#define SECTOR_SIZE 512
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 17, 0)
#include <linux/magic.h>
@ -17,7 +22,7 @@
#define EXFAT_SUPER_MAGIC 0x2011BAB0UL
#endif
#define EXFAT_VERSION "5.19.1"
#define EXFAT_VERSION "6.0.0"
#define EXFAT_ROOT_INO 1
@ -36,9 +41,9 @@ enum exfat_error_mode {
* exfat nls lossy flag
*/
enum {
NLS_NAME_NO_LOSSY, /* no lossy */
NLS_NAME_LOSSY, /* just detected incorrect filename(s) */
NLS_NAME_OVERLEN, /* the length is over than its limit */
NLS_NAME_NO_LOSSY = 0, /* no lossy */
NLS_NAME_LOSSY = 1 << 0, /* just detected incorrect filename(s) */
NLS_NAME_OVERLEN = 1 << 1, /* the length is over than its limit */
};
#define EXFAT_HASH_BITS 8
@ -50,7 +55,15 @@ enum {
#define ES_2_ENTRIES 2
#define ES_ALL_ENTRIES 0
#define DIR_DELETED 0xFFFF0321
#define ES_IDX_FILE 0
#define ES_IDX_STREAM 1
#define ES_IDX_FIRST_FILENAME 2
#define EXFAT_FILENAME_ENTRY_NUM(name_len) \
DIV_ROUND_UP(name_len, EXFAT_FILE_NAME_LEN)
#define ES_IDX_LAST_FILENAME(name_len) \
(ES_IDX_FIRST_FILENAME + EXFAT_FILENAME_ENTRY_NUM(name_len) - 1)
#define DIR_DELETED 0xFFFFFFF7
/* type values */
#define TYPE_UNUSED 0x0000
@ -71,15 +84,13 @@ enum {
#define TYPE_PADDING 0x0402
#define TYPE_ACLTAB 0x0403
#define TYPE_BENIGN_SEC 0x0800
#define TYPE_ALL 0x0FFF
#define TYPE_VENDOR_EXT 0x0801
#define TYPE_VENDOR_ALLOC 0x0802
#define MAX_CHARSET_SIZE 6 /* max size of multi-byte character */
#define MAX_NAME_LENGTH 255 /* max len of file name excluding NULL */
#define MAX_VFSNAME_BUF_SIZE ((MAX_NAME_LENGTH + 1) * MAX_CHARSET_SIZE)
/* Enough size to hold 256 dentry (even 512 Byte sector) */
#define DIR_CACHE_SIZE (256*sizeof(struct exfat_dentry)/512+1)
#define EXFAT_HINT_NONE -1
#define EXFAT_MIN_SUBDIR 2
@ -104,11 +115,17 @@ enum {
/*
* helpers for block size to dentry size conversion.
*/
#define EXFAT_B_TO_DEN_IDX(b, sbi) \
((b) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS))
#define EXFAT_B_TO_DEN(b) ((b) >> DENTRY_SIZE_BITS)
#define EXFAT_DEN_TO_B(b) ((b) << DENTRY_SIZE_BITS)
/*
* helpers for cluster size to dentry size conversion.
*/
#define EXFAT_CLU_TO_DEN(clu, sbi) \
((clu) << ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS))
#define EXFAT_DEN_TO_CLU(dentry, sbi) \
((dentry) >> ((sbi)->cluster_size_bits - DENTRY_SIZE_BITS))
/*
* helpers for fat entry.
*/
@ -134,6 +151,17 @@ enum {
#define BITS_PER_BYTE_MASK 0x7
#define IGNORED_BITS_REMAINED(clu, clu_base) ((1 << ((clu) - (clu_base))) - 1)
#define ES_ENTRY_NUM(name_len) (ES_IDX_LAST_FILENAME(name_len) + 1)
/* 19 entries = 1 file entry + 1 stream entry + 17 filename entries */
#define ES_MAX_ENTRY_NUM ES_ENTRY_NUM(MAX_NAME_LENGTH)
/*
* 19 entries x 32 bytes/entry = 608 bytes.
* The 608 bytes are in 3 sectors at most (even 512 Byte sector).
*/
#define DIR_CACHE_SIZE \
(DIV_ROUND_UP(EXFAT_DEN_TO_B(ES_MAX_ENTRY_NUM), SECTOR_SIZE) + 1)
struct exfat_dentry_namebuf {
char *lfn;
int lfnbuf_len; /* usually MAX_UNINAME_BUF_SIZE */
@ -175,13 +203,16 @@ struct exfat_hint {
struct exfat_entry_set_cache {
struct super_block *sb;
bool modified;
unsigned int start_off;
int num_bh;
struct buffer_head *bh[DIR_CACHE_SIZE];
struct buffer_head *__bh[DIR_CACHE_SIZE];
struct buffer_head **bh;
unsigned int num_entries;
bool modified;
};
#define IS_DYNAMIC_ES(es) ((es)->__bh != (es)->bh)
struct exfat_dir_entry {
struct exfat_chain dir;
int entry;
@ -394,7 +425,7 @@ static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
sbi->data_start_sector;
}
static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
sector_t sec)
{
return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
@ -442,15 +473,23 @@ int exfat_trim_fs(struct inode *inode, struct fstrim_range *range);
/* file.c */
extern const struct file_operations exfat_file_operations;
int __exfat_truncate(struct inode *inode, loff_t new_size);
void exfat_truncate(struct inode *inode, loff_t size);
int __exfat_truncate(struct inode *inode);
void exfat_truncate(struct inode *inode);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *attr);
int exfat_getattr(struct mnt_idmap *idmap, const struct path *path,
struct kstat *stat, unsigned int request_mask,
unsigned int query_flags);
#else
int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
struct iattr *attr);
int exfat_getattr(struct user_namespace *mnt_userns, const struct path *path,
struct kstat *stat, unsigned int request_mask,
unsigned int query_flags);
#endif
#else
int exfat_setattr(struct dentry *dentry, struct iattr *attr);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
@ -496,15 +535,16 @@ void exfat_update_dir_chksum_with_entry_set(struct exfat_entry_set_cache *es);
int exfat_calc_num_entries(struct exfat_uni_name *p_uniname);
int exfat_find_dir_entry(struct super_block *sb, struct exfat_inode_info *ei,
struct exfat_chain *p_dir, struct exfat_uni_name *p_uniname,
int num_entries, unsigned int type, struct exfat_hint *hint_opt);
struct exfat_hint *hint_opt);
int exfat_alloc_new_dir(struct inode *inode, struct exfat_chain *clu);
struct exfat_dentry *exfat_get_dentry(struct super_block *sb,
struct exfat_chain *p_dir, int entry, struct buffer_head **bh);
struct exfat_dentry *exfat_get_dentry_cached(struct exfat_entry_set_cache *es,
int num);
struct exfat_entry_set_cache *exfat_get_dentry_set(struct super_block *sb,
struct exfat_chain *p_dir, int entry, unsigned int type);
int exfat_free_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_get_dentry_set(struct exfat_entry_set_cache *es,
struct super_block *sb, struct exfat_chain *p_dir, int entry,
unsigned int type);
int exfat_put_dentry_set(struct exfat_entry_set_cache *es, int sync);
int exfat_count_dir_entries(struct super_block *sb, struct exfat_chain *p_dir);
/* inode.c */
@ -515,6 +555,7 @@ struct inode *exfat_build_inode(struct super_block *sb,
void exfat_hash_inode(struct inode *inode, loff_t i_pos);
void exfat_unhash_inode(struct inode *inode);
struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
int __exfat_write_inode(struct inode *inode, int sync);
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc);
void exfat_evict_inode(struct inode *inode);
int exfat_block_truncate_page(struct inode *inode, loff_t from);
@ -540,14 +581,16 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
#define exfat_fs_error_ratelimit(sb, fmt, args...) \
__exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \
fmt, ## args)
void exfat_msg(struct super_block *sb, const char *lv, const char *fmt, ...)
__printf(3, 4) __cold;
/* expand to pr_*() with prefix */
#define exfat_err(sb, fmt, ...) \
exfat_msg(sb, KERN_ERR, fmt, ##__VA_ARGS__)
pr_err("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
#define exfat_warn(sb, fmt, ...) \
exfat_msg(sb, KERN_WARNING, fmt, ##__VA_ARGS__)
pr_warn("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
#define exfat_info(sb, fmt, ...) \
exfat_msg(sb, KERN_INFO, fmt, ##__VA_ARGS__)
pr_info("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
#define exfat_debug(sb, fmt, ...) \
pr_debug("exFAT-fs (%s): " fmt "\n", (sb)->s_id, ##__VA_ARGS__)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
void exfat_get_entry_time(struct exfat_sb_info *sbi, struct timespec64 *ts,

21
fs/exfat/exfat_raw.h
View File

@ -27,6 +27,7 @@
((sbi)->num_clusters - EXFAT_RESERVED_CLUSTERS)
/* AllocationPossible and NoFatChain field in GeneralSecondaryFlags Field */
#define ALLOC_POSSIBLE 0x01
#define ALLOC_FAT_CHAIN 0x01
#define ALLOC_NO_FAT_CHAIN 0x03
@ -50,6 +51,8 @@
#define EXFAT_STREAM 0xC0 /* stream entry */
#define EXFAT_NAME 0xC1 /* file name entry */
#define EXFAT_ACL 0xC2 /* stream entry */
#define EXFAT_VENDOR_EXT 0xE0 /* vendor extension entry */
#define EXFAT_VENDOR_ALLOC 0xE1 /* vendor allocation entry */
#define IS_EXFAT_CRITICAL_PRI(x) (x < 0xA0)
#define IS_EXFAT_BENIGN_PRI(x) (x < 0xC0)
@ -155,6 +158,24 @@ struct exfat_dentry {
__le32 start_clu;
__le64 size;
} __packed upcase; /* up-case table directory entry */
struct {
__u8 flags;
__u8 vendor_guid[16];
__u8 vendor_defined[14];
} __packed vendor_ext; /* vendor extension directory entry */
struct {
__u8 flags;
__u8 vendor_guid[16];
__u8 vendor_defined[2];
__le32 start_clu;
__le64 size;
} __packed vendor_alloc; /* vendor allocation directory entry */
struct {
__u8 flags;
__u8 custom_defined[18];
__le32 start_clu;
__le64 size;
} __packed generic_secondary; /* generic secondary directory entry */
} __packed dentry;
} __packed;

31
fs/exfat/fatent.c
View File

@ -278,8 +278,7 @@ int exfat_zeroed_cluster(struct inode *dir, unsigned int clu)
struct super_block *sb = dir->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct buffer_head *bh;
sector_t blknr, last_blknr;
int i;
sector_t blknr, last_blknr, i;
blknr = exfat_cluster_to_sector(sbi, clu);
last_blknr = blknr + sbi->sect_per_clus;
@ -323,7 +322,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
struct exfat_chain *p_chain, bool sync_bmap)
{
int ret = -ENOSPC;
unsigned int num_clusters = 0, total_cnt;
unsigned int total_cnt;
unsigned int hint_clu, new_clu, last_clu = EXFAT_EOF_CLUSTER;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
@ -346,7 +345,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
/* find new cluster */
if (hint_clu == EXFAT_EOF_CLUSTER) {
if (sbi->clu_srch_ptr < EXFAT_FIRST_CLUSTER) {
exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)\n",
exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)",
sbi->clu_srch_ptr);
sbi->clu_srch_ptr = EXFAT_FIRST_CLUSTER;
}
@ -360,18 +359,12 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
/* check cluster validation */
if (!is_valid_cluster(sbi, hint_clu)) {
exfat_err(sb, "hint_cluster is invalid (%u)",
if (hint_clu != sbi->num_clusters)
exfat_err(sb, "hint_cluster is invalid (%u), rewind to the first cluster",
hint_clu);
hint_clu = EXFAT_FIRST_CLUSTER;
if (p_chain->flags == ALLOC_NO_FAT_CHAIN) {
if (exfat_chain_cont_cluster(sb, p_chain->dir,
num_clusters)) {
ret = -EIO;
goto unlock;
}
p_chain->flags = ALLOC_FAT_CHAIN;
}
}
p_chain->dir = EXFAT_EOF_CLUSTER;
@ -380,7 +373,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
if (new_clu != hint_clu &&
p_chain->flags == ALLOC_NO_FAT_CHAIN) {
if (exfat_chain_cont_cluster(sb, p_chain->dir,
num_clusters)) {
p_chain->size)) {
ret = -EIO;
goto free_cluster;
}
@ -393,8 +386,6 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
goto free_cluster;
}
num_clusters++;
/* update FAT table */
if (p_chain->flags == ALLOC_FAT_CHAIN) {
if (exfat_ent_set(sb, new_clu, EXFAT_EOF_CLUSTER)) {
@ -411,13 +402,14 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
goto free_cluster;
}
}
p_chain->size++;
last_clu = new_clu;
if (--num_alloc == 0) {
if (p_chain->size == num_alloc) {
sbi->clu_srch_ptr = hint_clu;
sbi->used_clusters += num_clusters;
sbi->used_clusters += num_alloc;
p_chain->size += num_clusters;
mutex_unlock(&sbi->bitmap_lock);
return 0;
}
@ -428,7 +420,7 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
if (p_chain->flags == ALLOC_NO_FAT_CHAIN) {
if (exfat_chain_cont_cluster(sb, p_chain->dir,
num_clusters)) {
p_chain->size)) {
ret = -EIO;
goto free_cluster;
}
@ -437,7 +429,6 @@ int exfat_alloc_cluster(struct inode *inode, unsigned int num_alloc,
}
}
free_cluster:
if (num_clusters)
__exfat_free_cluster(inode, p_chain);
unlock:
mutex_unlock(&sbi->bitmap_lock);

155
fs/exfat/file.c
View File

@ -100,7 +100,7 @@ static int exfat_sanitize_mode(const struct exfat_sb_info *sbi,
}
/* resize the file length */
int __exfat_truncate(struct inode *inode, loff_t new_size)
int __exfat_truncate(struct inode *inode)
{
unsigned int num_clusters_new, num_clusters_phys;
unsigned int last_clu = EXFAT_FREE_CLUSTER;
@ -108,7 +108,6 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
int evict = (ei->dir.dir == DIR_DELETED) ? 1 : 0;
/* check if the given file ID is opened */
if (ei->type != TYPE_FILE && ei->type != TYPE_DIR)
@ -121,7 +120,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
exfat_chain_set(&clu, ei->start_clu, num_clusters_phys, ei->flags);
if (new_size > 0) {
if (i_size_read(inode) > 0) {
/*
* Truncate FAT chain num_clusters after the first cluster
* num_clusters = min(new, phys);
@ -151,63 +150,22 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
ei->start_clu = EXFAT_EOF_CLUSTER;
}
i_size_write(inode, new_size);
if (ei->type == TYPE_FILE)
ei->attr |= ATTR_ARCHIVE;
/* update the directory entry */
if (!evict) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
struct timespec64 ts;
#else
struct timespec ts;
#endif
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es;
int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
if (!es)
/*
* update the directory entry
*
* If the directory entry is updated by mark_inode_dirty(), the
* directory entry will be written after a writeback cycle of
* updating the bitmap/FAT, which may result in clusters being
* freed but referenced by the directory entry in the event of a
* sudden power failure.
* __exfat_write_inode() is called for directory entry, bitmap
* and FAT to be written in a same writeback.
*/
if (__exfat_write_inode(inode, inode_needs_sync(inode)))
return -EIO;
ep = exfat_get_dentry_cached(es, 0);
ep2 = exfat_get_dentry_cached(es, 1);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
ts = current_time(inode);
#else
ts = CURRENT_TIME_SEC;
#endif
exfat_set_entry_time(sbi, &ts,
&ep->dentry.file.modify_tz,
&ep->dentry.file.modify_time,
&ep->dentry.file.modify_date,
&ep->dentry.file.modify_time_cs);
ep->dentry.file.attr = cpu_to_le16(ei->attr);
/* File size should be zero if there is no cluster allocated */
if (ei->start_clu == EXFAT_EOF_CLUSTER) {
ep2->dentry.stream.valid_size = 0;
ep2->dentry.stream.size = 0;
} else {
ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
}
if (new_size == 0) {
/* Any directory can not be truncated to zero */
WARN_ON(ei->type != TYPE_FILE);
ep2->dentry.stream.flags = ALLOC_FAT_CHAIN;
ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER;
}
exfat_update_dir_chksum_with_entry_set(es);
err = exfat_free_dentry_set(es, inode_needs_sync(inode));
if (err)
return err;
}
/* cut off from the FAT chain */
if (ei->flags == ALLOC_FAT_CHAIN && last_clu != EXFAT_FREE_CLUSTER &&
@ -236,7 +194,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
return 0;
}
void exfat_truncate(struct inode *inode, loff_t size)
void exfat_truncate(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
@ -258,22 +216,11 @@ void exfat_truncate(struct inode *inode, loff_t size)
goto write_size;
}
err = __exfat_truncate(inode, i_size_read(inode));
err = __exfat_truncate(inode);
if (err)
goto write_size;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
inode->i_ctime = inode->i_mtime = current_time(inode);
#else
inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
#endif
if (IS_DIRSYNC(inode))
exfat_sync_inode(inode);
else
mark_inode_dirty(inode);
inode->i_blocks = ((i_size_read(inode) + (sbi->cluster_size - 1)) &
~((loff_t)sbi->cluster_size - 1)) >> inode->i_blkbits;
inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >> 9;
write_size:
aligned_size = i_size_read(inode);
if (aligned_size & (blocksize - 1)) {
@ -290,9 +237,15 @@ write_size:
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
int exfat_getattr(struct mnt_idmap *idmap, const struct path *path,
struct kstat *stat, unsigned int request_mask,
unsigned int query_flags)
#else
int exfat_getattr(struct user_namespace *mnt_uerns, const struct path *path,
struct kstat *stat, unsigned int request_mask,
unsigned int query_flags)
#endif
#else
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
int exfat_getattr(const struct path *path, struct kstat *stat,
@ -311,7 +264,11 @@ int exfat_getattr(struct vfsmount *mnt, struct dentry *dentry,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
generic_fillattr(&nop_mnt_idmap, inode, stat);
#else
generic_fillattr(&init_user_ns, inode, stat);
#endif
#else
generic_fillattr(inode, stat);
#endif
@ -326,8 +283,13 @@ int exfat_getattr(struct vfsmount *mnt, struct dentry *dentry,
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
int exfat_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *attr)
#else
int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
struct iattr *attr)
#endif
#else
int exfat_setattr(struct dentry *dentry, struct iattr *attr)
#endif
@ -357,7 +319,11 @@ int exfat_setattr(struct dentry *dentry, struct iattr *attr)
(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 37))) || \
(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0))
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
#else
error = setattr_prepare(&init_user_ns, dentry, attr);
#endif
#else
error = setattr_prepare(dentry, attr);
#endif
@ -387,6 +353,24 @@ int exfat_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid &= ~ATTR_MODE;
}
if (attr->ia_valid & ATTR_SIZE)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
inode->i_mtime = inode->i_ctime = current_time(inode);
#else
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
setattr_copy(&nop_mnt_idmap, inode, attr);
#else
setattr_copy(&init_user_ns, inode, attr);
#endif
#else
setattr_copy(inode, attr);
#endif
exfat_truncate_atime(&inode->i_atime);
if (attr->ia_valid & ATTR_SIZE) {
error = exfat_block_truncate_page(inode, attr->ia_size);
if (error)
@ -394,39 +378,46 @@ int exfat_setattr(struct dentry *dentry, struct iattr *attr)
down_write(&EXFAT_I(inode)->truncate_lock);
truncate_setsize(inode, attr->ia_size);
exfat_truncate(inode, attr->ia_size);
/*
* __exfat_write_inode() is called from exfat_truncate(), inode
* is already written by it, so mark_inode_dirty() is unneeded.
*/
exfat_truncate(inode);
up_write(&EXFAT_I(inode)->truncate_lock);
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
setattr_copy(&init_user_ns, inode, attr);
#else
setattr_copy(inode, attr);
#endif
exfat_truncate_atime(&inode->i_atime);
} else
mark_inode_dirty(inode);
out:
return error;
}
static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(5, 19, 0)
struct request_queue *q = bdev_get_queue(inode->i_sb->s_bdev);
#endif
struct fstrim_range range;
int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
if (!bdev_max_discard_sectors(inode->i_sb->s_bdev))
#else
if (!blk_queue_discard(q))
#endif
return -EOPNOTSUPP;
if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
return -EFAULT;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
range.minlen = max_t(unsigned int, range.minlen,
bdev_discard_granularity(inode->i_sb->s_bdev));
#else
range.minlen = max_t(unsigned int, range.minlen,
q->limits.discard_granularity);
#endif
ret = exfat_trim_fs(inode, &range);
if (ret < 0)
@ -492,7 +483,11 @@ const struct file_operations exfat_file_operations = {
#endif
.mmap = generic_file_mmap,
.fsync = exfat_file_fsync,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 5, 0)
.splice_read = filemap_splice_read,
#else
.splice_read = generic_file_splice_read,
#endif
.splice_write = iter_file_splice_write,
};

105
fs/exfat/inode.c
View File

@ -19,11 +19,11 @@
#include "exfat_raw.h"
#include "exfat_fs.h"
static int __exfat_write_inode(struct inode *inode, int sync)
int __exfat_write_inode(struct inode *inode, int sync)
{
unsigned long long on_disk_size;
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es = NULL;
struct exfat_entry_set_cache es;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
@ -44,11 +44,10 @@ static int __exfat_write_inode(struct inode *inode, int sync)
exfat_set_volume_dirty(sb);
/* get the directory entry of given file or directory */
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry, ES_ALL_ENTRIES);
if (!es)
if (exfat_get_dentry_set(&es, sb, &(ei->dir), ei->entry, ES_ALL_ENTRIES))
return -EIO;
ep = exfat_get_dentry_cached(es, 0);
ep2 = exfat_get_dentry_cached(es, 1);
ep = exfat_get_dentry_cached(&es, ES_IDX_FILE);
ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM);
ep->dentry.file.attr = cpu_to_le16(exfat_make_attr(inode));
@ -77,9 +76,16 @@ static int __exfat_write_inode(struct inode *inode, int sync)
ep2->dentry.stream.valid_size = cpu_to_le64(on_disk_size);
ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
if (on_disk_size) {
ep2->dentry.stream.flags = ei->flags;
ep2->dentry.stream.start_clu = cpu_to_le32(ei->start_clu);
} else {
ep2->dentry.stream.flags = ALLOC_FAT_CHAIN;
ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER;
}
exfat_update_dir_chksum_with_entry_set(es);
return exfat_free_dentry_set(es, sync);
exfat_update_dir_chksum_with_entry_set(&es);
return exfat_put_dentry_set(&es, sync);
}
int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
@ -107,7 +113,7 @@ void exfat_sync_inode(struct inode *inode)
static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
unsigned int *clu, int create)
{
int ret, modified = false;
int ret;
unsigned int last_clu;
struct exfat_chain new_clu;
struct super_block *sb = inode->i_sb;
@ -198,7 +204,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
if (new_clu.flags == ALLOC_FAT_CHAIN)
ei->flags = ALLOC_FAT_CHAIN;
ei->start_clu = new_clu.dir;
modified = true;
} else {
if (new_clu.flags != ei->flags) {
/* no-fat-chain bit is disabled,
@ -208,7 +213,6 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
exfat_chain_cont_cluster(sb, ei->start_clu,
num_clusters);
ei->flags = ALLOC_FAT_CHAIN;
modified = true;
}
if (new_clu.flags == ALLOC_FAT_CHAIN)
if (exfat_ent_set(sb, last_clu, new_clu.dir))
@ -218,35 +222,7 @@ static int exfat_map_cluster(struct inode *inode, unsigned int clu_offset,
num_clusters += num_to_be_allocated;
*clu = new_clu.dir;
if (ei->dir.dir != DIR_DELETED && modified) {
struct exfat_dentry *ep;
struct exfat_entry_set_cache *es;
int err;
es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
ES_ALL_ENTRIES);
if (!es)
return -EIO;
/* get stream entry */
ep = exfat_get_dentry_cached(es, 1);
/* update directory entry */
ep->dentry.stream.flags = ei->flags;
ep->dentry.stream.start_clu =
cpu_to_le32(ei->start_clu);
ep->dentry.stream.valid_size =
cpu_to_le64(i_size_read(inode));
ep->dentry.stream.size =
ep->dentry.stream.valid_size;
exfat_update_dir_chksum_with_entry_set(es);
err = exfat_free_dentry_set(es, inode_needs_sync(inode));
if (err)
return err;
} /* end of if != DIR_DELETED */
inode->i_blocks +=
num_to_be_allocated << sbi->sect_per_clus_bits;
inode->i_blocks += EXFAT_CLU_TO_B(num_to_be_allocated, sbi) >> 9;
/*
* Move *clu pointer along FAT chains (hole care) because the
@ -359,10 +335,17 @@ unlock_ret:
return err;
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
static int exfat_read_folio(struct file *file, struct folio *folio)
{
return mpage_read_folio(folio, exfat_get_block);
}
#else
static int exfat_readpage(struct file *file, struct page *page)
{
return mpage_readpage(page, exfat_get_block);
}
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
static void exfat_readahead(struct readahead_control *rac)
@ -377,10 +360,12 @@ static int exfat_readpages(struct file *file, struct address_space *mapping,
}
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)
static int exfat_writepage(struct page *page, struct writeback_control *wbc)
{
return block_write_full_page(page, exfat_get_block, wbc);
}
#endif
static int exfat_writepages(struct address_space *mapping,
struct writeback_control *wbc)
@ -394,21 +379,37 @@ static void exfat_write_failed(struct address_space *mapping, loff_t to)
if (to > i_size_read(inode)) {
truncate_pagecache(inode, i_size_read(inode));
exfat_truncate(inode, EXFAT_I(inode)->i_size_aligned);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 10, 0)
inode->i_mtime = inode->i_ctime = current_time(inode);
#else
inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
#endif
exfat_truncate(inode);
}
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
static int exfat_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned int len,
struct page **pagep, void **fsdata)
#else
static int exfat_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned int len, unsigned int flags,
struct page **pagep, void **fsdata)
#endif
{
int ret;
*pagep = NULL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
ret = cont_write_begin(file, mapping, pos, len, pagep, fsdata,
exfat_get_block,
&EXFAT_I(mapping->host)->i_size_ondisk);
#else
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
exfat_get_block,
&EXFAT_I(mapping->host)->i_size_ondisk);
#endif
if (ret < 0)
exfat_write_failed(mapping, pos+len);
@ -522,18 +523,29 @@ static const struct address_space_operations exfat_aops = {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 18, 0)
.invalidate_folio = block_invalidate_folio,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
.read_folio = exfat_read_folio,
#else
.readpage = exfat_readpage,
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 8, 0)
.readahead = exfat_readahead,
#else
.readpages = exfat_readpages,
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)
.writepage = exfat_writepage,
#endif
.writepages = exfat_writepages,
.write_begin = exfat_write_begin,
.write_end = exfat_write_end,
.direct_IO = exfat_direct_IO,
#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)
.bmap = exfat_aop_bmap
#else
.bmap = exfat_aop_bmap,
.migrate_folio = buffer_migrate_folio,
#endif
};
static inline unsigned long exfat_hash(loff_t i_pos)
@ -611,7 +623,11 @@ static int exfat_fill_inode(struct inode *inode, struct exfat_dir_entry *info)
#else
inode->i_version++;
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 1, 0)
inode->i_generation = get_random_u32();
#else
inode->i_generation = prandom_u32();
#endif
if (info->attr & ATTR_SUBDIR) { /* directory */
inode->i_generation &= ~1;
@ -641,8 +657,7 @@ static int exfat_fill_inode(struct inode *inode, struct exfat_dir_entry *info)
exfat_save_attr(inode, info->attr);
inode->i_blocks = ((i_size_read(inode) + (sbi->cluster_size - 1)) &
~((loff_t)sbi->cluster_size - 1)) >> inode->i_blkbits;
inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >> 9;
inode->i_mtime = info->mtime;
inode->i_ctime = info->mtime;
ei->i_crtime = info->crtime;
@ -690,7 +705,7 @@ void exfat_evict_inode(struct inode *inode)
if (!inode->i_nlink) {
i_size_write(inode, 0);
mutex_lock(&EXFAT_SB(inode->i_sb)->s_lock);
__exfat_truncate(inode, 0);
__exfat_truncate(inode);
mutex_unlock(&EXFAT_SB(inode->i_sb)->s_lock);
}

17
fs/exfat/misc.c
View File

@ -52,23 +52,6 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
}
}
/*
* exfat_msg() - print preformated EXFAT specific messages.
* All logs except what uses exfat_fs_error() should be written by exfat_msg()
*/
void exfat_msg(struct super_block *sb, const char *level, const char *fmt, ...)
{
struct va_format vaf;
va_list args;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
/* level means KERN_ pacility level */
printk("%sexFAT-fs (%s): %pV\n", level, sb->s_id, &vaf);
va_end(args);
}
#define SECS_PER_MIN (60)
#define TIMEZONE_SEC(x) ((x) * 15 * SECS_PER_MIN)

108
fs/exfat/namei.c
View File

@ -251,11 +251,18 @@ static int exfat_search_empty_slot(struct super_block *sb,
if (hint_femp->eidx != EXFAT_HINT_NONE) {
dentry = hint_femp->eidx;
if (num_entries <= hint_femp->count) {
hint_femp->eidx = EXFAT_HINT_NONE;
return dentry;
}
/*
* If hint_femp->count is enough, it is needed to check if
* there are actual empty entries.
* Otherwise, and if "dentry + hint_famp->count" is also equal
* to "p_dir->size * dentries_per_clu", it means ENOSPC.
*/
if (dentry + hint_femp->count == p_dir->size * dentries_per_clu &&
num_entries > hint_femp->count)
return -ENOSPC;
hint_femp->eidx = EXFAT_HINT_NONE;
exfat_chain_dup(&clu, &hint_femp->cur);
} else {
exfat_chain_dup(&clu, p_dir);
@ -320,6 +327,12 @@ static int exfat_search_empty_slot(struct super_block *sb,
}
}
hint_femp->eidx = p_dir->size * dentries_per_clu - num_empty;
hint_femp->count = num_empty;
if (num_empty == 0)
exfat_chain_set(&hint_femp->cur, EXFAT_EOF_CLUSTER, 0,
clu.flags);
return -ENOSPC;
}
@ -345,7 +358,6 @@ static int exfat_find_empty_entry(struct inode *inode,
unsigned int ret, last_clu;
loff_t size = 0;
struct exfat_chain clu;
struct exfat_dentry *ep = NULL;
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
@ -397,44 +409,21 @@ static int exfat_find_empty_entry(struct inode *inode,
if (exfat_ent_set(sb, last_clu, clu.dir))
return -EIO;
if (hint_femp.eidx == EXFAT_HINT_NONE) {
/* the special case that new dentry
* should be allocated from the start of new cluster
*/
hint_femp.eidx = EXFAT_B_TO_DEN_IDX(p_dir->size, sbi);
hint_femp.count = sbi->dentries_per_clu;
if (hint_femp.cur.dir == EXFAT_EOF_CLUSTER)
exfat_chain_set(&hint_femp.cur, clu.dir, 0, clu.flags);
}
hint_femp.count += sbi->dentries_per_clu;
hint_femp.cur.size++;
p_dir->size++;
size = EXFAT_CLU_TO_B(p_dir->size, sbi);
/* update the directory entry */
if (p_dir->dir != sbi->root_dir) {
struct buffer_head *bh;
ep = exfat_get_dentry(sb,
&(ei->dir), ei->entry + 1, &bh);
if (!ep)
return -EIO;
ep->dentry.stream.valid_size = cpu_to_le64(size);
ep->dentry.stream.size = ep->dentry.stream.valid_size;
ep->dentry.stream.flags = p_dir->flags;
exfat_update_bh(bh, IS_DIRSYNC(inode));
brelse(bh);
if (exfat_update_dir_chksum(inode, &(ei->dir),
ei->entry))
return -EIO;
}
/* directory inode should be updated in here */
i_size_write(inode, size);
ei->i_size_ondisk += sbi->cluster_size;
ei->i_size_aligned += sbi->cluster_size;
ei->flags = p_dir->flags;
inode->i_blocks += 1 << sbi->sect_per_clus_bits;
inode->i_blocks += sbi->cluster_size >> 9;
}
return dentry;
@ -489,7 +478,7 @@ static int __exfat_resolve_path(struct inode *inode, const unsigned char *path,
return namelen; /* return error value */
if ((lossy && !lookup) || !namelen)
return -EINVAL;
return (lossy & NLS_NAME_OVERLEN) ? -ENAMETOOLONG : -EINVAL;
exfat_chain_set(p_dir, ei->start_clu,
EXFAT_B_TO_CLU(i_size_read(inode), sbi), ei->flags);
@ -590,8 +579,13 @@ out:
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
static int exfat_create(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
#else
static int exfat_create(struct user_namespace *mnt_userns, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
#endif
#else
static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
bool excl)
@ -658,14 +652,14 @@ unlock:
static int exfat_find(struct inode *dir, struct qstr *qname,
struct exfat_dir_entry *info)
{
int ret, dentry, num_entries, count;
int ret, dentry, count;
struct exfat_chain cdir;
struct exfat_uni_name uni_name;
struct super_block *sb = dir->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(dir);
struct exfat_dentry *ep, *ep2;
struct exfat_entry_set_cache *es;
struct exfat_entry_set_cache es;
/* for optimized dir & entry to prevent long traverse of cluster chain */
struct exfat_hint hint_opt;
@ -677,10 +671,6 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
if (ret)
return ret;
num_entries = exfat_calc_num_entries(&uni_name);
if (num_entries < 0)
return num_entries;
/* check the validation of hint_stat and initialize it if required */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)
if (ei->version != (inode_peek_iversion_raw(dir) & 0xffffffff)) {
@ -698,9 +688,7 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
}
/* search the file name for directories */
dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name,
num_entries, TYPE_ALL, &hint_opt);
dentry = exfat_find_dir_entry(sb, ei, &cdir, &uni_name, &hint_opt);
if (dentry < 0)
return dentry; /* -error value */
@ -713,11 +701,10 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
if (cdir.flags & ALLOC_NO_FAT_CHAIN)
cdir.size -= dentry / sbi->dentries_per_clu;
dentry = hint_opt.eidx;
es = exfat_get_dentry_set(sb, &cdir, dentry, ES_2_ENTRIES);
if (!es)
if (exfat_get_dentry_set(&es, sb, &cdir, dentry, ES_2_ENTRIES))
return -EIO;
ep = exfat_get_dentry_cached(es, 0);
ep2 = exfat_get_dentry_cached(es, 1);
ep = exfat_get_dentry_cached(&es, ES_IDX_FILE);
ep2 = exfat_get_dentry_cached(&es, ES_IDX_STREAM);
info->type = exfat_get_entry_type(ep);
info->attr = le16_to_cpu(ep->dentry.file.attr);
@ -746,7 +733,7 @@ static int exfat_find(struct inode *dir, struct qstr *qname,
ep->dentry.file.access_time,
ep->dentry.file.access_date,
0);
exfat_free_dentry_set(es, false);
exfat_put_dentry_set(&es, false);
if (ei->start_clu == EXFAT_FREE_CLUSTER) {
exfat_fs_error(sb,
@ -931,8 +918,13 @@ unlock:
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
static int exfat_mkdir(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode)
#else
static int exfat_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
struct dentry *dentry, umode_t mode)
#endif
#else
static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
#endif
@ -1303,7 +1295,7 @@ static int __exfat_rename(struct inode *old_parent_inode,
struct exfat_inode_info *new_ei = NULL;
unsigned int new_entry_type = TYPE_UNUSED;
int new_entry = 0;
struct buffer_head *old_bh, *new_bh = NULL;
struct buffer_head *new_bh = NULL;
/* check the validity of pointer parameters */
if (new_path == NULL || strlen(new_path) == 0)
@ -1314,16 +1306,11 @@ static int __exfat_rename(struct inode *old_parent_inode,
return -ENOENT;
}
exfat_chain_dup(&olddir, &ei->dir);
exfat_chain_set(&olddir, EXFAT_I(old_parent_inode)->start_clu,
EXFAT_B_TO_CLU_ROUND_UP(i_size_read(old_parent_inode), sbi),
EXFAT_I(old_parent_inode)->flags);
dentry = ei->entry;
ep = exfat_get_dentry(sb, &olddir, dentry, &old_bh);
if (!ep) {
ret = -EIO;
goto out;
}
brelse(old_bh);
/* check whether new dir is existing directory and empty */
if (new_inode) {
ret = -EIO;
@ -1425,10 +1412,17 @@ out:
}
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 12, 0)
#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 3, 0)
static int exfat_rename(struct mnt_idmap *idmap,
struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
#else
static int exfat_rename(struct user_namespace *mnt_userns,
struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
#endif
#else
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0)
static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,

4
fs/exfat/nls.c
View File

@ -513,7 +513,7 @@ static int exfat_utf8_to_utf16(struct super_block *sb,
}
if (unilen > MAX_NAME_LENGTH) {
exfat_err(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d",
exfat_debug(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d",
__func__, len, unilen, MAX_NAME_LENGTH);
return -ENAMETOOLONG;
}
@ -679,7 +679,7 @@ static int exfat_load_upcase_table(struct super_block *sb,
bh = sb_bread(sb, sector);
if (!bh) {
exfat_err(sb, "failed to read sector(0x%llx)\n",
exfat_err(sb, "failed to read sector(0x%llx)",
(unsigned long long)sector);
ret = -EIO;
goto free_table;

31
fs/exfat/super.c
View File

@ -547,7 +547,7 @@ static int parse_options(struct super_block *sb, char *options, int silent,
break;
default:
if (!silent) {
exfat_msg(sb, KERN_ERR,
exfat_err(sb,
"unrecognized mount option \"%s\" or missing value",
p);
}
@ -559,14 +559,21 @@ out:
if (opts->allow_utime == -1)
opts->allow_utime = ~opts->fs_dmask & (0022);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
if (opts->discard && !bdev_max_discard_sectors(sb->s_bdev)) {
exfat_warn(sb, "mounting with \"discard\" option, but the device does not support discard");
opts->discard = 0;
}
#else
if (opts->discard) {
struct request_queue *q = bdev_get_queue(sb->s_bdev);
if (!blk_queue_discard(q))
exfat_msg(sb, KERN_WARNING,
"mounting with \"discard\" option, but the device does not support discard");
if (!blk_queue_discard(q)) {
exfat_warn(sb, "mounting with \"discard\" option, but the device does not support discard");
opts->discard = 0;
}
}
#endif
return 0;
}
@ -625,8 +632,7 @@ static int exfat_read_root(struct inode *inode)
inode->i_op = &exfat_dir_inode_operations;
inode->i_fop = &exfat_dir_operations;
inode->i_blocks = ((i_size_read(inode) + (sbi->cluster_size - 1)) &
~((loff_t)sbi->cluster_size - 1)) >> inode->i_blkbits;
inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >> 9;
ei->i_pos = ((loff_t)sbi->root_dir << 32) | 0xffffffff;
ei->i_size_aligned = i_size_read(inode);
ei->i_size_ondisk = i_size_read(inode);
@ -721,7 +727,7 @@ static int exfat_read_boot_sector(struct super_block *sb)
*/
if (p_boot->sect_size_bits < EXFAT_MIN_SECT_SIZE_BITS ||
p_boot->sect_size_bits > EXFAT_MAX_SECT_SIZE_BITS) {
exfat_err(sb, "bogus sector size bits : %u\n",
exfat_err(sb, "bogus sector size bits : %u",
p_boot->sect_size_bits);
return -EINVAL;
}
@ -730,7 +736,7 @@ static int exfat_read_boot_sector(struct super_block *sb)
* sect_per_clus_bits could be at least 0 and at most 25 - sect_size_bits.
*/
if (p_boot->sect_per_clus_bits > EXFAT_MAX_SECT_PER_CLUS_BITS(p_boot)) {
exfat_err(sb, "bogus sectors bits per cluster : %u\n",
exfat_err(sb, "bogus sectors bits per cluster : %u",
p_boot->sect_per_clus_bits);
return -EINVAL;
}
@ -896,6 +902,12 @@ static int exfat_fill_super(struct super_block *sb, void *data, int silent)
if (opts->allow_utime == (unsigned short)-1)
opts->allow_utime = ~opts->fs_dmask & 0022;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 19, 0)
if (opts->discard && !bdev_max_discard_sectors(sb->s_bdev)) {
exfat_warn(sb, "mounting with \"discard\" option, but the device does not support discard");
opts->discard = 0;
}
#else
if (opts->discard) {
struct request_queue *q = bdev_get_queue(sb->s_bdev);
@ -904,6 +916,7 @@ static int exfat_fill_super(struct super_block *sb, void *data, int silent)
opts->discard = 0;
}
}
#endif
#else
struct exfat_sb_info *sbi;
@ -924,7 +937,7 @@ static int exfat_fill_super(struct super_block *sb, void *data, int silent)
DEFAULT_RATELIMIT_BURST);
err = parse_options(sb, data, silent, &sbi->options);
if (err) {
exfat_msg(sb, KERN_ERR, "failed to parse options");
exfat_err(sb, "failed to parse options");
goto check_nls_io;
}
#endif