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Updates to various subsystems which I help look after. lib, ocfs2,

Browse source 
fatfs, autofs, squashfs, procfs, etc.
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Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Pull misc updates from Andrew Morton:
 "Updates to various subsystems which I help look after. lib, ocfs2,
  fatfs, autofs, squashfs, procfs, etc. A relatively small amount of
  material this time"

* tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits)
  scripts/gdb: ensure the absolute path is generated on initial source
  MAINTAINERS: kunit: add David Gow as a maintainer of KUnit
  mailmap: add linux.dev alias for Brendan Higgins
  mailmap: update Kirill's email
  profile: setup_profiling_timer() is moslty not implemented
  ocfs2: fix a typo in a comment
  ocfs2: use the bitmap API to simplify code
  ocfs2: remove some useless functions
  lib/mpi: fix typo 'the the' in comment
  proc: add some (hopefully) insightful comments
  bdi: remove enum wb_congested_state
  kernel/hung_task: fix address space of proc_dohung_task_timeout_secs
  lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t()
  squashfs: support reading fragments in readahead call
  squashfs: implement readahead
  squashfs: always build "file direct" version of page actor
  Revert "squashfs: provide backing_dev_info in order to disable read-ahead"
  fs/ocfs2: Fix spelling typo in comment
  ia64: old_rr4 added under CONFIG_HUGETLB_PAGE
  proc: fix test for "vsyscall=xonly" boot option
  ...
This commit is contained in:
Linus Torvalds 2022-08-07 10:03:24 -07:00
commit eb5699ba31
102 changed files with 1313 additions and 724 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
.mailmap
View file

@ -78,6 +78,7 @@ Boris Brezillon <bbrezillon@kernel.org> <b.brezillon.dev@gmail.com>
Boris Brezillon <bbrezillon@kernel.org> <b.brezillon@overkiz.com>
Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@bootlin.com>
Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@free-electrons.com>
Brendan Higgins <brendan.higgins@linux.dev> <brendanhiggins@google.com>
Brian Avery <b.avery@hp.com>
Brian King <brking@us.ibm.com>
Brian Silverman <bsilver16384@gmail.com> <brian.silverman@bluerivertech.com>
@ -230,7 +231,7 @@ Kees Cook <keescook@chromium.org> <kees@ubuntu.com>
Keith Busch <kbusch@kernel.org> <keith.busch@intel.com>
Keith Busch <kbusch@kernel.org> <keith.busch@linux.intel.com>
Kenneth W Chen <kenneth.w.chen@intel.com>
Kirill Tkhai <kirill.tkhai@openvz.org> <ktkhai@virtuozzo.com>
Kirill Tkhai <tkhai@ya.ru> <ktkhai@virtuozzo.com>
Konstantin Khlebnikov <koct9i@gmail.com> <khlebnikov@yandex-team.ru>
Konstantin Khlebnikov <koct9i@gmail.com> <k.khlebnikov@samsung.com>
Koushik <raghavendra.koushik@neterion.com>

13
Documentation/admin-guide/kernel-parameters.txt
View file

@ -1673,6 +1673,19 @@
hlt [BUGS=ARM,SH]
hostname= [KNL] Set the hostname (aka UTS nodename).
Format: <string>
This allows setting the system's hostname during early
startup. This sets the name returned by gethostname.
Using this parameter to set the hostname makes it
possible to ensure the hostname is correctly set before
any userspace processes run, avoiding the possibility
that a process may call gethostname before the hostname
has been explicitly set, resulting in the calling
process getting an incorrect result. The string must
not exceed the maximum allowed hostname length (usually
64 characters) and will be truncated otherwise.
hpet= [X86-32,HPET] option to control HPET usage
Format: { enable (default) | disable | force |
verbose }

2
MAINTAINERS
View file

@ -11065,6 +11065,7 @@ F: fs/smbfs_common/
KERNEL UNIT TESTING FRAMEWORK (KUnit)
M: Brendan Higgins <brendanhiggins@google.com>
M: David Gow <davidgow@google.com>
L: linux-kselftest@vger.kernel.org
L: kunit-dev@googlegroups.com
S: Maintained
@ -21277,6 +21278,7 @@ M: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
S: Maintained
F: Documentation/filesystems/vfat.rst
F: fs/fat/
F: tools/testing/selftests/filesystems/fat/
VFIO DRIVER
M: Alex Williamson <alex.williamson@redhat.com>

6
arch/alpha/kernel/smp.c
View file

@ -497,12 +497,6 @@ smp_cpus_done(unsigned int max_cpus)
((bogosum + 2500) / (5000/HZ)) % 100);
}
int
setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
static void
send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
{

8
arch/arc/kernel/smp.c
View file

@ -232,14 +232,6 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
return 0;
}
/*
* not supported here
*/
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
/*****************************************************************************/
/* Inter Processor Interrupt Handling */
/*****************************************************************************/

8
arch/arm/kernel/smp.c
View file

@ -787,14 +787,6 @@ void panic_smp_self_stop(void)
cpu_relax();
}
/*
* not supported here
*/
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
#ifdef CONFIG_CPU_FREQ
static DEFINE_PER_CPU(unsigned long, l_p_j_ref);

8
arch/arm64/kernel/smp.c
View file

@ -1078,14 +1078,6 @@ bool smp_crash_stop_failed(void)
}
#endif
/*
* not supported here
*/
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
static bool have_cpu_die(void)
{
#ifdef CONFIG_HOTPLUG_CPU

5
arch/csky/kernel/smp.c
View file

@ -243,11 +243,6 @@ void __init smp_cpus_done(unsigned int max_cpus)
{
}
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
void csky_start_secondary(void)
{
struct mm_struct *mm = &init_mm;

5
arch/hexagon/kernel/smp.c
View file

@ -240,11 +240,6 @@ void arch_send_call_function_ipi_mask(const struct cpumask *mask)
send_ipi(mask, IPI_CALL_FUNC);
}
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
void smp_start_cpus(void)
{
int i;

5
arch/ia64/include/asm/mmu_context.h
View file

@ -124,9 +124,12 @@ reload_context (nv_mm_context_t context)
{
unsigned long rid;
unsigned long rid_incr = 0;
unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
unsigned long rr0, rr1, rr2, rr3, rr4;
#ifdef CONFIG_HUGETLB_PAGE
unsigned long old_rr4;
old_rr4 = ia64_get_rr(RGN_BASE(RGN_HPAGE));
#endif
rid = context << 3; /* make space for encoding the region number */
rid_incr = 1 << 8;

28
arch/ia64/include/uapi/asm/cmpxchg.h
View file

@ -33,24 +33,24 @@ extern void ia64_xchg_called_with_bad_pointer(void);
\
switch (size) { \
case 1: \
__xchg_result = ia64_xchg1((__u8 *)ptr, x); \
__xchg_result = ia64_xchg1((__u8 __force *)ptr, x); \
break; \
\
case 2: \
__xchg_result = ia64_xchg2((__u16 *)ptr, x); \
__xchg_result = ia64_xchg2((__u16 __force *)ptr, x); \
break; \
\
case 4: \
__xchg_result = ia64_xchg4((__u32 *)ptr, x); \
__xchg_result = ia64_xchg4((__u32 __force *)ptr, x); \
break; \
\
case 8: \
__xchg_result = ia64_xchg8((__u64 *)ptr, x); \
__xchg_result = ia64_xchg8((__u64 __force *)ptr, x); \
break; \
default: \
ia64_xchg_called_with_bad_pointer(); \
} \
__xchg_result; \
(__typeof__ (*(ptr)) __force) __xchg_result; \
})
#ifndef __KERNEL__
@ -76,42 +76,42 @@ extern long ia64_cmpxchg_called_with_bad_pointer(void);
\
switch (size) { \
case 1: \
_o_ = (__u8) (long) (old); \
_o_ = (__u8) (long __force) (old); \
break; \
case 2: \
_o_ = (__u16) (long) (old); \
_o_ = (__u16) (long __force) (old); \
break; \
case 4: \
_o_ = (__u32) (long) (old); \
_o_ = (__u32) (long __force) (old); \
break; \
case 8: \
_o_ = (__u64) (long) (old); \
_o_ = (__u64) (long __force) (old); \
break; \
default: \
break; \
} \
switch (size) { \
case 1: \
_r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \
_r_ = ia64_cmpxchg1_##sem((__u8 __force *) ptr, new, _o_); \
break; \
\
case 2: \
_r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \
_r_ = ia64_cmpxchg2_##sem((__u16 __force *) ptr, new, _o_); \
break; \
\
case 4: \
_r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \
_r_ = ia64_cmpxchg4_##sem((__u32 __force *) ptr, new, _o_); \
break; \
\
case 8: \
_r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \
_r_ = ia64_cmpxchg8_##sem((__u64 __force *) ptr, new, _o_); \
break; \
\
default: \
_r_ = ia64_cmpxchg_called_with_bad_pointer(); \
break; \
} \
(__typeof__(old)) _r_; \
(__typeof__(old) __force) _r_; \
})
#define cmpxchg_acq(ptr, o, n) \

6
arch/ia64/kernel/smp.c
View file

@ -333,9 +333,3 @@ smp_send_stop (void)
{
send_IPI_allbutself(IPI_CPU_STOP);
}
int
setup_profiling_timer (unsigned int multiplier)
{
return -EINVAL;
}

6
arch/openrisc/kernel/smp.c
View file

@ -197,12 +197,6 @@ void smp_send_stop(void)
smp_call_function(stop_this_cpu, NULL, 0);
}
/* not supported, yet */
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
{
smp_cross_call = fn;

7
arch/parisc/kernel/smp.c
View file

@ -513,10 +513,3 @@ void __cpu_die(unsigned int cpu)
pdc_cpu_rendezvous_unlock();
}
#ifdef CONFIG_PROC_FS
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
#endif

7
arch/powerpc/kernel/smp.c
View file

@ -1663,13 +1663,6 @@ void start_secondary(void *unused)
BUG();
}
#ifdef CONFIG_PROFILING
int setup_profiling_timer(unsigned int multiplier)
{
return 0;
}
#endif
static void __init fixup_topology(void)
{
int i;

6
arch/riscv/kernel/smp.c
View file

@ -64,12 +64,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
return phys_id == cpuid_to_hartid_map(cpu);
}
/* Unsupported */
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
static void ipi_stop(void)
{
set_cpu_online(smp_processor_id(), false);

5
arch/sparc/kernel/smp_32.c
View file

@ -174,11 +174,6 @@ void smp_call_function_interrupt(void)
irq_exit();
}
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
void __init smp_prepare_cpus(unsigned int max_cpus)
{
int i, cpuid, extra;

6
arch/sparc/kernel/smp_64.c
View file

@ -1186,12 +1186,6 @@ void __irq_entry smp_penguin_jailcell(int irq, struct pt_regs *regs)
preempt_enable();
}
/* /proc/profile writes can call this, don't __init it please. */
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
void __init smp_prepare_cpus(unsigned int max_cpus)
{
}

2
arch/x86/include/asm/apic.h
View file

@ -98,8 +98,6 @@ static inline bool apic_from_smp_config(void)
#include <asm/paravirt.h>
#endif
extern int setup_profiling_timer(unsigned int);
static inline void native_apic_mem_write(u32 reg, u32 v)
{
volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);

5
arch/x86/kernel/apic/apic.c
View file

@ -1115,11 +1115,6 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_apic_timer_interrupt)
set_irq_regs(old_regs);
}
int setup_profiling_timer(unsigned int multiplier)
{
return -EINVAL;
}
/*
* Local APIC start and shutdown
*/

6
arch/x86/kernel/cpu/cacheinfo.c
View file

@ -29,6 +29,12 @@
#define LVL_3 4
#define LVL_TRACE 5
/* Shared last level cache maps */
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
/* Shared L2 cache maps */
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
struct _cache_table {
unsigned char descriptor;
char cache_type;

4
arch/x86/kernel/smpboot.c
View file

@ -95,10 +95,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_core_map);
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
EXPORT_PER_CPU_SYMBOL(cpu_die_map);
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
/* Per CPU bogomips and other parameters */
DEFINE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);

7
fs/autofs/autofs_i.h
View file

@ -51,8 +51,6 @@ extern struct file_system_type autofs_fs_type;
*/
struct autofs_info {
struct dentry *dentry;
struct inode *inode;
int flags;
struct completion expire_complete;
@ -148,6 +146,11 @@ static inline int autofs_oz_mode(struct autofs_sb_info *sbi)
task_pgrp(current) == sbi->oz_pgrp);
}
static inline bool autofs_empty(struct autofs_info *ino)
{
return ino->count < 2;
}
struct inode *autofs_get_inode(struct super_block *, umode_t);
void autofs_free_ino(struct autofs_info *);

2
fs/autofs/expire.c
View file

@ -371,7 +371,7 @@ static struct dentry *should_expire(struct dentry *dentry,
return NULL;
}
if (simple_empty(dentry))
if (autofs_empty(ino))
return NULL;
/* Case 2: tree mount, expire iff entire tree is not busy */

1
fs/autofs/inode.c
View file

@ -20,6 +20,7 @@ struct autofs_info *autofs_new_ino(struct autofs_sb_info *sbi)
INIT_LIST_HEAD(&ino->expiring);
ino->last_used = jiffies;
ino->sbi = sbi;
ino->count = 1;
}
return ino;
}

108
fs/autofs/root.c
View file

@ -10,6 +10,7 @@
#include "autofs_i.h"
static int autofs_dir_permission(struct user_namespace *, struct inode *, int);
static int autofs_dir_symlink(struct user_namespace *, struct inode *,
struct dentry *, const char *);
static int autofs_dir_unlink(struct inode *, struct dentry *);
@ -50,6 +51,7 @@ const struct file_operations autofs_dir_operations = {
const struct inode_operations autofs_dir_inode_operations = {
.lookup = autofs_lookup,
.permission = autofs_dir_permission,
.unlink = autofs_dir_unlink,
.symlink = autofs_dir_symlink,
.mkdir = autofs_dir_mkdir,
@ -77,6 +79,7 @@ static int autofs_dir_open(struct inode *inode, struct file *file)
{
struct dentry *dentry = file->f_path.dentry;
struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
struct autofs_info *ino = autofs_dentry_ino(dentry);
pr_debug("file=%p dentry=%p %pd\n", file, dentry, dentry);
@ -93,7 +96,7 @@ static int autofs_dir_open(struct inode *inode, struct file *file)
* it.
*/
spin_lock(&sbi->lookup_lock);
if (!path_is_mountpoint(&file->f_path) && simple_empty(dentry)) {
if (!path_is_mountpoint(&file->f_path) && autofs_empty(ino)) {
spin_unlock(&sbi->lookup_lock);
return -ENOENT;
}
@ -288,9 +291,26 @@ static struct dentry *autofs_mountpoint_changed(struct path *path)
struct dentry *dentry = path->dentry;
struct autofs_sb_info *sbi = autofs_sbi(dentry->d_sb);
/*
* If this is an indirect mount the dentry could have gone away
* as a result of an expire and a new one created.
/* If this is an indirect mount the dentry could have gone away
* and a new one created.
*
* This is unusual and I can't remember the case for which it
* was originally added now. But an example of how this can
* happen is an autofs indirect mount that has the "browse"
* option set and also has the "symlink" option in the autofs
* map entry. In this case the daemon will remove the browse
* directory and create a symlink as the mount leaving the
* struct path stale.
*
* Another not so obvious case is when a mount in an autofs
* indirect mount that uses the "nobrowse" option is being
* expired at the same time as a path walk. If the mount has
* been umounted but the mount point directory seen before
* becoming unhashed (during a lockless path walk) when a stat
* family system call is made the mount won't be re-mounted as
* it should. In this case the mount point that's been removed
* (by the daemon) will be stale and the a new mount point
* dentry created.
*/
if (autofs_type_indirect(sbi->type) && d_unhashed(dentry)) {
struct dentry *parent = dentry->d_parent;
@ -362,7 +382,7 @@ static struct vfsmount *autofs_d_automount(struct path *path)
* the mount never trigger mounts themselves (they have an
* autofs trigger mount mounted on them). But v4 pseudo direct
* mounts do need the leaves to trigger mounts. In this case
* we have no choice but to use the list_empty() check and
* we have no choice but to use the autofs_empty() check and
* require user space behave.
*/
if (sbi->version > 4) {
@ -371,7 +391,7 @@ static struct vfsmount *autofs_d_automount(struct path *path)
goto done;
}
} else {
if (!simple_empty(dentry)) {
if (!autofs_empty(ino)) {
spin_unlock(&sbi->fs_lock);
goto done;
}
@ -426,9 +446,8 @@ static int autofs_d_manage(const struct path *path, bool rcu_walk)
if (rcu_walk) {
/* We don't need fs_lock in rcu_walk mode,
* just testing 'AUTOFS_INFO_NO_RCU' is enough.
* simple_empty() takes a spinlock, so leave it
* to last.
* just testing 'AUTOFS_INF_WANT_EXPIRE' is enough.
*
* We only return -EISDIR when certain this isn't
* a mount-trap.
*/
@ -441,9 +460,7 @@ static int autofs_d_manage(const struct path *path, bool rcu_walk)
inode = d_inode_rcu(dentry);
if (inode && S_ISLNK(inode->i_mode))
return -EISDIR;
if (list_empty(&dentry->d_subdirs))
return 0;
if (!simple_empty(dentry))
if (!autofs_empty(ino))
return -EISDIR;
return 0;
}
@ -463,7 +480,7 @@ static int autofs_d_manage(const struct path *path, bool rcu_walk)
* we can avoid needless calls ->d_automount() and avoid
* an incorrect ELOOP error return.
*/
if ((!path_is_mountpoint(path) && !simple_empty(dentry)) ||
if ((!path_is_mountpoint(path) && !autofs_empty(ino)) ||
(d_really_is_positive(dentry) && d_is_symlink(dentry)))
status = -EISDIR;
}
@ -526,18 +543,11 @@ static struct dentry *autofs_lookup(struct inode *dir,
return NULL;
}
static int autofs_dir_symlink(struct user_namespace *mnt_userns,
struct inode *dir, struct dentry *dentry,
const char *symname)
static int autofs_dir_permission(struct user_namespace *mnt_userns,
struct inode *inode, int mask)
{
struct autofs_sb_info *sbi = autofs_sbi(dir->i_sb);
struct autofs_info *ino = autofs_dentry_ino(dentry);
struct autofs_info *p_ino;
struct inode *inode;
size_t size = strlen(symname);
char *cp;
pr_debug("%s <- %pd\n", symname, dentry);
if (mask & MAY_WRITE) {
struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb);
if (!autofs_oz_mode(sbi))
return -EACCES;
@ -548,6 +558,22 @@ static int autofs_dir_symlink(struct user_namespace *mnt_userns,
*/
if (sbi->flags & AUTOFS_SBI_CATATONIC)
return -EACCES;
}
return generic_permission(mnt_userns, inode, mask);
}
static int autofs_dir_symlink(struct user_namespace *mnt_userns,
struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct autofs_info *ino = autofs_dentry_ino(dentry);
struct autofs_info *p_ino;
struct inode *inode;
size_t size = strlen(symname);
char *cp;
pr_debug("%s <- %pd\n", symname, dentry);
BUG_ON(!ino);
@ -571,7 +597,6 @@ static int autofs_dir_symlink(struct user_namespace *mnt_userns,
d_add(dentry, inode);
dget(dentry);
ino->count++;
p_ino = autofs_dentry_ino(dentry->d_parent);
p_ino->count++;
@ -601,17 +626,6 @@ static int autofs_dir_unlink(struct inode *dir, struct dentry *dentry)
struct autofs_info *ino = autofs_dentry_ino(dentry);
struct autofs_info *p_ino;
if (!autofs_oz_mode(sbi))
return -EACCES;
/* autofs_oz_mode() needs to allow path walks when the
* autofs mount is catatonic but the state of an autofs
* file system needs to be preserved over restarts.
*/
if (sbi->flags & AUTOFS_SBI_CATATONIC)
return -EACCES;
ino->count--;
p_ino = autofs_dentry_ino(dentry->d_parent);
p_ino->count--;
dput(ino->dentry);
@ -683,16 +697,6 @@ static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
pr_debug("dentry %p, removing %pd\n", dentry, dentry);
if (!autofs_oz_mode(sbi))
return -EACCES;
/* autofs_oz_mode() needs to allow path walks when the
* autofs mount is catatonic but the state of an autofs
* file system needs to be preserved over restarts.
*/
if (sbi->flags & AUTOFS_SBI_CATATONIC)
return -EACCES;
if (ino->count != 1)
return -ENOTEMPTY;
@ -704,7 +708,6 @@ static int autofs_dir_rmdir(struct inode *dir, struct dentry *dentry)
if (sbi->version < 5)
autofs_clear_leaf_automount_flags(dentry);
ino->count--;
p_ino = autofs_dentry_ino(dentry->d_parent);
p_ino->count--;
dput(ino->dentry);
@ -726,16 +729,6 @@ static int autofs_dir_mkdir(struct user_namespace *mnt_userns,
struct autofs_info *p_ino;
struct inode *inode;
if (!autofs_oz_mode(sbi))
return -EACCES;
/* autofs_oz_mode() needs to allow path walks when the
* autofs mount is catatonic but the state of an autofs
* file system needs to be preserved over restarts.
*/
if (sbi->flags & AUTOFS_SBI_CATATONIC)
return -EACCES;
pr_debug("dentry %p, creating %pd\n", dentry, dentry);
BUG_ON(!ino);
@ -753,7 +746,6 @@ static int autofs_dir_mkdir(struct user_namespace *mnt_userns,
autofs_set_leaf_automount_flags(dentry);
dget(dentry);
ino->count++;
p_ino = autofs_dentry_ino(dentry->d_parent);
p_ino->count++;
inc_nlink(dir);

22
fs/eventpoll.c
View file

@ -1747,6 +1747,21 @@ static struct timespec64 *ep_timeout_to_timespec(struct timespec64 *to, long ms)
return to;
}
/*
* autoremove_wake_function, but remove even on failure to wake up, because we
* know that default_wake_function/ttwu will only fail if the thread is already
* woken, and in that case the ep_poll loop will remove the entry anyways, not
* try to reuse it.
*/
static int ep_autoremove_wake_function(struct wait_queue_entry *wq_entry,
unsigned int mode, int sync, void *key)
{
int ret = default_wake_function(wq_entry, mode, sync, key);
list_del_init(&wq_entry->entry);
return ret;
}
/**
* ep_poll - Retrieves ready events, and delivers them to the caller-supplied
* event buffer.
@ -1828,8 +1843,15 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
* normal wakeup path no need to call __remove_wait_queue()
* explicitly, thus ep->lock is not taken, which halts the
* event delivery.
*
* In fact, we now use an even more aggressive function that
* unconditionally removes, because we don't reuse the wait
* entry between loop iterations. This lets us also avoid the
* performance issue if a process is killed, causing all of its
* threads to wake up without being removed normally.
*/
init_wait(&wait);
wait.func = ep_autoremove_wake_function;
write_lock_irq(&ep->lock);
/*

223
fs/fat/namei_vfat.c
View file

@ -889,22 +889,57 @@ static int vfat_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
return err;
}
static int vfat_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)
static int vfat_get_dotdot_de(struct inode *inode, struct buffer_head **bh,
struct msdos_dir_entry **de)
{
if (S_ISDIR(inode->i_mode)) {
if (fat_get_dotdot_entry(inode, bh, de))
return -EIO;
}
return 0;
}
static int vfat_sync_ipos(struct inode *dir, struct inode *inode)
{
if (IS_DIRSYNC(dir))
return fat_sync_inode(inode);
mark_inode_dirty(inode);
return 0;
}
static int vfat_update_dotdot_de(struct inode *dir, struct inode *inode,
struct buffer_head *dotdot_bh,
struct msdos_dir_entry *dotdot_de)
{
fat_set_start(dotdot_de, MSDOS_I(dir)->i_logstart);
mark_buffer_dirty_inode(dotdot_bh, inode);
if (IS_DIRSYNC(dir))
return sync_dirty_buffer(dotdot_bh);
return 0;
}
static void vfat_update_dir_metadata(struct inode *dir, struct timespec64 *ts)
{
inode_inc_iversion(dir);
fat_truncate_time(dir, ts, S_CTIME | S_MTIME);
if (IS_DIRSYNC(dir))
(void)fat_sync_inode(dir);
else
mark_inode_dirty(dir);
}
static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct buffer_head *dotdot_bh;
struct msdos_dir_entry *dotdot_de;
struct msdos_dir_entry *dotdot_de = NULL;
struct inode *old_inode, *new_inode;
struct fat_slot_info old_sinfo, sinfo;
struct timespec64 ts;
loff_t new_i_pos;
int err, is_dir, update_dotdot, corrupt = 0;
int err, is_dir, corrupt = 0;
struct super_block *sb = old_dir->i_sb;
if (flags & ~RENAME_NOREPLACE)
return -EINVAL;
old_sinfo.bh = sinfo.bh = dotdot_bh = NULL;
old_inode = d_inode(old_dentry);
new_inode = d_inode(new_dentry);
@ -913,15 +948,13 @@ static int vfat_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
if (err)
goto out;
is_dir = S_ISDIR(old_inode->i_mode);
update_dotdot = (is_dir && old_dir != new_dir);
if (update_dotdot) {
if (fat_get_dotdot_entry(old_inode, &dotdot_bh, &dotdot_de)) {
err = -EIO;
if (old_dir != new_dir) {
err = vfat_get_dotdot_de(old_inode, &dotdot_bh, &dotdot_de);
if (err)
goto out;
}
}
is_dir = S_ISDIR(old_inode->i_mode);
ts = current_time(old_dir);
if (new_inode) {
if (is_dir) {
@ -942,21 +975,15 @@ static int vfat_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
fat_detach(old_inode);
fat_attach(old_inode, new_i_pos);
if (IS_DIRSYNC(new_dir)) {
err = fat_sync_inode(old_inode);
err = vfat_sync_ipos(new_dir, old_inode);
if (err)
goto error_inode;
} else
mark_inode_dirty(old_inode);
if (update_dotdot) {
fat_set_start(dotdot_de, MSDOS_I(new_dir)->i_logstart);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
if (IS_DIRSYNC(new_dir)) {
err = sync_dirty_buffer(dotdot_bh);
if (dotdot_de) {
err = vfat_update_dotdot_de(new_dir, old_inode, dotdot_bh,
dotdot_de);
if (err)
goto error_dotdot;
}
drop_nlink(old_dir);
if (!new_inode)
inc_nlink(new_dir);
@ -966,12 +993,7 @@ static int vfat_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
old_sinfo.bh = NULL;
if (err)
goto error_dotdot;
inode_inc_iversion(old_dir);
fat_truncate_time(old_dir, &ts, S_CTIME|S_MTIME);
if (IS_DIRSYNC(old_dir))
(void)fat_sync_inode(old_dir);
else
mark_inode_dirty(old_dir);
vfat_update_dir_metadata(old_dir, &ts);
if (new_inode) {
drop_nlink(new_inode);
@ -991,10 +1013,9 @@ static int vfat_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
/* data cluster is shared, serious corruption */
corrupt = 1;
if (update_dotdot) {
fat_set_start(dotdot_de, MSDOS_I(old_dir)->i_logstart);
mark_buffer_dirty_inode(dotdot_bh, old_inode);
corrupt |= sync_dirty_buffer(dotdot_bh);
if (dotdot_de) {
corrupt |= vfat_update_dotdot_de(old_dir, old_inode, dotdot_bh,
dotdot_de);
}
error_inode:
fat_detach(old_inode);
@ -1021,13 +1042,145 @@ static int vfat_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
goto out;
}
static void vfat_exchange_ipos(struct inode *old_inode, struct inode *new_inode,
loff_t old_i_pos, loff_t new_i_pos)
{
fat_detach(old_inode);
fat_detach(new_inode);
fat_attach(old_inode, new_i_pos);
fat_attach(new_inode, old_i_pos);
}
static void vfat_move_nlink(struct inode *src, struct inode *dst)
{
drop_nlink(src);
inc_nlink(dst);
}
static int vfat_rename_exchange(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
struct buffer_head *old_dotdot_bh = NULL, *new_dotdot_bh = NULL;
struct msdos_dir_entry *old_dotdot_de = NULL, *new_dotdot_de = NULL;
struct inode *old_inode, *new_inode;
struct timespec64 ts = current_time(old_dir);
loff_t old_i_pos, new_i_pos;
int err, corrupt = 0;
struct super_block *sb = old_dir->i_sb;
old_inode = d_inode(old_dentry);
new_inode = d_inode(new_dentry);
/* Acquire super block lock for the operation to be atomic */
mutex_lock(&MSDOS_SB(sb)->s_lock);
/* if directories are not the same, get ".." info to update */
if (old_dir != new_dir) {
err = vfat_get_dotdot_de(old_inode, &old_dotdot_bh,
&old_dotdot_de);
if (err)
goto out;
err = vfat_get_dotdot_de(new_inode, &new_dotdot_bh,
&new_dotdot_de);
if (err)
goto out;
}
old_i_pos = MSDOS_I(old_inode)->i_pos;
new_i_pos = MSDOS_I(new_inode)->i_pos;
vfat_exchange_ipos(old_inode, new_inode, old_i_pos, new_i_pos);
err = vfat_sync_ipos(old_dir, new_inode);
if (err)
goto error_exchange;
err = vfat_sync_ipos(new_dir, old_inode);
if (err)
goto error_exchange;
/* update ".." directory entry info */
if (old_dotdot_de) {
err = vfat_update_dotdot_de(new_dir, old_inode, old_dotdot_bh,
old_dotdot_de);
if (err)
goto error_old_dotdot;
}
if (new_dotdot_de) {
err = vfat_update_dotdot_de(old_dir, new_inode, new_dotdot_bh,
new_dotdot_de);
if (err)
goto error_new_dotdot;
}
/* if cross directory and only one is a directory, adjust nlink */
if (!old_dotdot_de != !new_dotdot_de) {
if (old_dotdot_de)
vfat_move_nlink(old_dir, new_dir);
else
vfat_move_nlink(new_dir, old_dir);
}
vfat_update_dir_metadata(old_dir, &ts);
/* if directories are not the same, update new_dir as well */
if (old_dir != new_dir)
vfat_update_dir_metadata(new_dir, &ts);
out:
brelse(old_dotdot_bh);
brelse(new_dotdot_bh);
mutex_unlock(&MSDOS_SB(sb)->s_lock);
return err;
error_new_dotdot:
if (new_dotdot_de) {
corrupt |= vfat_update_dotdot_de(new_dir, new_inode,
new_dotdot_bh, new_dotdot_de);
}
error_old_dotdot:
if (old_dotdot_de) {
corrupt |= vfat_update_dotdot_de(old_dir, old_inode,
old_dotdot_bh, old_dotdot_de);
}
error_exchange:
vfat_exchange_ipos(old_inode, new_inode, new_i_pos, old_i_pos);
corrupt |= vfat_sync_ipos(new_dir, new_inode);
corrupt |= vfat_sync_ipos(old_dir, old_inode);
if (corrupt < 0) {
fat_fs_error(new_dir->i_sb,
"%s: Filesystem corrupted (i_pos %lld, %lld)",
__func__, old_i_pos, new_i_pos);
}
goto out;
}
static int vfat_rename2(struct user_namespace *mnt_userns, struct inode *old_dir,
struct dentry *old_dentry, struct inode *new_dir,
struct dentry *new_dentry, unsigned int flags)
{
if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
return -EINVAL;
if (flags & RENAME_EXCHANGE) {
return vfat_rename_exchange(old_dir, old_dentry,
new_dir, new_dentry);
}
/* VFS already handled RENAME_NOREPLACE, handle it as a normal rename */
return vfat_rename(old_dir, old_dentry, new_dir, new_dentry);
}
static const struct inode_operations vfat_dir_inode_operations = {
.create = vfat_create,
.lookup = vfat_lookup,
.unlink = vfat_unlink,
.mkdir = vfat_mkdir,
.rmdir = vfat_rmdir,
.rename = vfat_rename,
.rename = vfat_rename2,
.setattr = fat_setattr,
.getattr = fat_getattr,
.update_time = fat_update_time,

20
fs/kernel_read_file.c
View file

@ -29,15 +29,15 @@
* change between calls to kernel_read_file().
*
* Returns number of bytes read (no single read will be bigger
* than INT_MAX), or negative on error.
* than SSIZE_MAX), or negative on error.
*
*/
int kernel_read_file(struct file *file, loff_t offset, void **buf,
ssize_t kernel_read_file(struct file *file, loff_t offset, void **buf,
size_t buf_size, size_t *file_size,
enum kernel_read_file_id id)
{
loff_t i_size, pos;
size_t copied;
ssize_t copied;
void *allocated = NULL;
bool whole_file;
int ret;
@ -58,7 +58,7 @@ int kernel_read_file(struct file *file, loff_t offset, void **buf,
goto out;
}
/* The file is too big for sane activities. */
if (i_size > INT_MAX) {
if (i_size > SSIZE_MAX) {
ret = -EFBIG;
goto out;
}
@ -124,12 +124,12 @@ int kernel_read_file(struct file *file, loff_t offset, void **buf,
}
EXPORT_SYMBOL_GPL(kernel_read_file);
int kernel_read_file_from_path(const char *path, loff_t offset, void **buf,
ssize_t kernel_read_file_from_path(const char *path, loff_t offset, void **buf,
size_t buf_size, size_t *file_size,
enum kernel_read_file_id id)
{
struct file *file;
int ret;
ssize_t ret;
if (!path || !*path)
return -EINVAL;
@ -144,14 +144,14 @@ int kernel_read_file_from_path(const char *path, loff_t offset, void **buf,
}
EXPORT_SYMBOL_GPL(kernel_read_file_from_path);
int kernel_read_file_from_path_initns(const char *path, loff_t offset,
ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset,
void **buf, size_t buf_size,
size_t *file_size,
enum kernel_read_file_id id)
{
struct file *file;
struct path root;
int ret;
ssize_t ret;
if (!path || !*path)
return -EINVAL;
@ -171,12 +171,12 @@ int kernel_read_file_from_path_initns(const char *path, loff_t offset,
}
EXPORT_SYMBOL_GPL(kernel_read_file_from_path_initns);
int kernel_read_file_from_fd(int fd, loff_t offset, void **buf,
ssize_t kernel_read_file_from_fd(int fd, loff_t offset, void **buf,
size_t buf_size, size_t *file_size,
enum kernel_read_file_id id)
{
struct fd f = fdget(fd);
int ret = -EBADF;
ssize_t ret = -EBADF;
if (!f.file || !(f.file->f_mode & FMODE_READ))
goto out;

10
fs/ocfs2/dlmfs/dlmfs.c
View file

@ -296,17 +296,25 @@ static void dlmfs_evict_inode(struct inode *inode)
{
int status;
struct dlmfs_inode_private *ip;
struct user_lock_res *lockres;
int teardown;
clear_inode(inode);
mlog(0, "inode %lu\n", inode->i_ino);
ip = DLMFS_I(inode);
lockres = &ip->ip_lockres;
if (S_ISREG(inode->i_mode)) {
status = user_dlm_destroy_lock(&ip->ip_lockres);
spin_lock(&lockres->l_lock);
teardown = !!(lockres->l_flags & USER_LOCK_IN_TEARDOWN);
spin_unlock(&lockres->l_lock);
if (!teardown) {
status = user_dlm_destroy_lock(lockres);
if (status < 0)
mlog_errno(status);
}
iput(ip->ip_parent);
goto clear_fields;
}

27
fs/ocfs2/heartbeat.c
View file

@ -2,12 +2,13 @@
/*
* heartbeat.c
*
* Register ourselves with the heartbaet service, keep our node maps
* Register ourselves with the heartbeat service, keep our node maps
* up to date, and fire off recovery when needed.
*
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
*/
#include <linux/bitmap.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/highmem.h>
@ -24,18 +25,12 @@
#include "buffer_head_io.h"
static inline void __ocfs2_node_map_set_bit(struct ocfs2_node_map *map,
int bit);
static inline void __ocfs2_node_map_clear_bit(struct ocfs2_node_map *map,
int bit);
/* special case -1 for now
* TODO: should *really* make sure the calling func never passes -1!! */
static void ocfs2_node_map_init(struct ocfs2_node_map *map)
{
map->num_nodes = OCFS2_NODE_MAP_MAX_NODES;
memset(map->map, 0, BITS_TO_LONGS(OCFS2_NODE_MAP_MAX_NODES) *
sizeof(unsigned long));
bitmap_zero(map->map, OCFS2_NODE_MAP_MAX_NODES);
}
void ocfs2_init_node_maps(struct ocfs2_super *osb)
@ -65,12 +60,6 @@ void ocfs2_do_node_down(int node_num, void *data)
ocfs2_recovery_thread(osb, node_num);
}
static inline void __ocfs2_node_map_set_bit(struct ocfs2_node_map *map,
int bit)
{
set_bit(bit, map->map);
}
void ocfs2_node_map_set_bit(struct ocfs2_super *osb,
struct ocfs2_node_map *map,
int bit)
@ -79,16 +68,10 @@ void ocfs2_node_map_set_bit(struct ocfs2_super *osb,
return;
BUG_ON(bit >= map->num_nodes);
spin_lock(&osb->node_map_lock);
__ocfs2_node_map_set_bit(map, bit);
set_bit(bit, map->map);
spin_unlock(&osb->node_map_lock);
}
static inline void __ocfs2_node_map_clear_bit(struct ocfs2_node_map *map,
int bit)
{
clear_bit(bit, map->map);
}
void ocfs2_node_map_clear_bit(struct ocfs2_super *osb,
struct ocfs2_node_map *map,
int bit)
@ -97,7 +80,7 @@ void ocfs2_node_map_clear_bit(struct ocfs2_super *osb,
return;
BUG_ON(bit >= map->num_nodes);
spin_lock(&osb->node_map_lock);
__ocfs2_node_map_clear_bit(map, bit);
clear_bit(bit, map->map);
spin_unlock(&osb->node_map_lock);
}

2
fs/ocfs2/quota_global.c
View file

@ -412,7 +412,7 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
goto out_err;
}
/* Write information to global quota file. Expects exlusive lock on quota
/* Write information to global quota file. Expects exclusive lock on quota
* file inode and quota info */
static int __ocfs2_global_write_info(struct super_block *sb, int type)
{

5
fs/proc/array.c
View file

@ -69,7 +69,6 @@
#include <linux/sched/cputime.h>
#include <linux/proc_fs.h>
#include <linux/ioport.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
@ -100,6 +99,10 @@ void proc_task_name(struct seq_file *m, struct task_struct *p, bool escape)
{
char tcomm[64];
/*
* Test before PF_KTHREAD because all workqueue worker threads are
* kernel threads.
*/
if (p->flags & PF_WQ_WORKER)
wq_worker_comm(tcomm, sizeof(tcomm), p);
else if (p->flags & PF_KTHREAD)

44
fs/proc/base.c
View file

@ -1914,11 +1914,6 @@ struct inode *proc_pid_make_inode(struct super_block * sb,
/* Let the pid remember us for quick removal */
ei->pid = pid;
if (S_ISDIR(mode)) {
spin_lock(&pid->lock);
hlist_add_head_rcu(&ei->sibling_inodes, &pid->inodes);
spin_unlock(&pid->lock);
}
task_dump_owner(task, 0, &inode->i_uid, &inode->i_gid);
security_task_to_inode(task, inode);
@ -1931,6 +1926,39 @@ struct inode *proc_pid_make_inode(struct super_block * sb,
return NULL;
}
/*
* Generating an inode and adding it into @pid->inodes, so that task will
* invalidate inode's dentry before being released.
*
* This helper is used for creating dir-type entries under '/proc' and
* '/proc/<tgid>/task'. Other entries(eg. fd, stat) under '/proc/<tgid>'
* can be released by invalidating '/proc/<tgid>' dentry.
* In theory, dentries under '/proc/<tgid>/task' can also be released by
* invalidating '/proc/<tgid>' dentry, we reserve it to handle single
* thread exiting situation: Any one of threads should invalidate its
* '/proc/<tgid>/task/<pid>' dentry before released.
*/
static struct inode *proc_pid_make_base_inode(struct super_block *sb,
struct task_struct *task, umode_t mode)
{
struct inode *inode;
struct proc_inode *ei;
struct pid *pid;
inode = proc_pid_make_inode(sb, task, mode);
if (!inode)
return NULL;
/* Let proc_flush_pid find this directory inode */
ei = PROC_I(inode);
pid = ei->pid;
spin_lock(&pid->lock);
hlist_add_head_rcu(&ei->sibling_inodes, &pid->inodes);
spin_unlock(&pid->lock);
return inode;
}
int pid_getattr(struct user_namespace *mnt_userns, const struct path *path,
struct kstat *stat, u32 request_mask, unsigned int query_flags)
{
@ -3369,7 +3397,8 @@ static struct dentry *proc_pid_instantiate(struct dentry * dentry,
{
struct inode *inode;
inode = proc_pid_make_inode(dentry->d_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
inode = proc_pid_make_base_inode(dentry->d_sb, task,
S_IFDIR | S_IRUGO | S_IXUGO);
if (!inode)
return ERR_PTR(-ENOENT);
@ -3671,7 +3700,8 @@ static struct dentry *proc_task_instantiate(struct dentry *dentry,
struct task_struct *task, const void *ptr)
{
struct inode *inode;
inode = proc_pid_make_inode(dentry->d_sb, task, S_IFDIR | S_IRUGO | S_IXUGO);
inode = proc_pid_make_base_inode(dentry->d_sb, task,
S_IFDIR | S_IRUGO | S_IXUGO);
if (!inode)
return ERR_PTR(-ENOENT);

19
fs/proc/inode.c
View file

@ -26,8 +26,6 @@
#include <linux/mount.h>
#include <linux/bug.h>
#include <linux/uaccess.h>
#include "internal.h"
static void proc_evict_inode(struct inode *inode)
@ -214,7 +212,15 @@ static void unuse_pde(struct proc_dir_entry *pde)
complete(pde->pde_unload_completion);
}
/* pde is locked on entry, unlocked on exit */
/*
* At most 2 contexts can enter this function: the one doing the last
* close on the descriptor and whoever is deleting PDE itself.
*
* First to enter calls ->proc_release hook and signals its completion
* to the second one which waits and then does nothing.
*
* PDE is locked on entry, unlocked on exit.
*/
static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
__releases(&pde->pde_unload_lock)
{
@ -224,9 +230,6 @@ static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
*
* rmmod (remove_proc_entry() et al) can't delete an entry and proceed:
* "struct file" needs to be available at the right moment.
*
* Therefore, first process to enter this function does ->release() and
* signals its completion to the other process which does nothing.
*/
if (pdeo->closing) {
/* somebody else is doing that, just wait */
@ -240,10 +243,12 @@ static void close_pdeo(struct proc_dir_entry *pde, struct pde_opener *pdeo)
pdeo->closing = true;
spin_unlock(&pde->pde_unload_lock);
file = pdeo->file;
pde->proc_ops->proc_release(file_inode(file), file);
spin_lock(&pde->pde_unload_lock);
/* After ->release. */
/* Strictly after ->proc_release, see above. */
list_del(&pdeo->lh);
c = pdeo->c;
spin_unlock(&pde->pde_unload_lock);

1
fs/proc/kmsg.c
View file

@ -15,7 +15,6 @@
#include <linux/fs.h>
#include <linux/syslog.h>
#include <linux/uaccess.h>
#include <asm/io.h>
extern wait_queue_head_t log_wait;

1
fs/proc/nommu.c
View file

@ -21,7 +21,6 @@
#include <linux/seq_file.h>
#include <linux/hugetlb.h>
#include <linux/vmalloc.h>
#include <linux/uaccess.h>
#include <asm/tlb.h>
#include <asm/div64.h>
#include "internal.h"

9
fs/proc/proc_net.c
View file

@ -8,9 +8,6 @@
*
* proc net directory handling functions
*/
#include <linux/uaccess.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
@ -353,6 +350,12 @@ static __net_init int proc_net_ns_init(struct net *net)
kgid_t gid;
int err;
/*
* This PDE acts only as an anchor for /proc/${pid}/net hierarchy.
* Corresponding inode (PDE(inode) == net->proc_net) is never
* instantiated therefore blanket zeroing is fine.
* net->proc_net_stat inode is instantiated normally.
*/
err = -ENOMEM;
netd = kmem_cache_zalloc(proc_dir_entry_cache, GFP_KERNEL);
if (!netd)

2
fs/proc/proc_tty.c
View file

@ -4,8 +4,6 @@
*
* Copyright 1997, Theodore Ts'o
*/
#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>

8
fs/proc/root.c
View file

@ -6,9 +6,6 @@
*
* proc root directory handling functions
*/
#include <linux/uaccess.h>
#include <linux/errno.h>
#include <linux/time.h>
#include <linux/proc_fs.h>
@ -305,6 +302,11 @@ void __init proc_root_init(void)
proc_mkdir("bus", NULL);
proc_sys_init();
/*
* Last things last. It is not like userspace processes eager
* to open /proc files exist at this point but register last
* anyway.
*/
register_filesystem(&proc_fs_type);
}

1
fs/proc/vmcore.c
View file

@ -25,7 +25,6 @@
#include <linux/mutex.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/uaccess.h>
#include <linux/uio.h>
#include <linux/cc_platform.h>
#include <asm/io.h>

4
fs/squashfs/Makefile
View file

@ -5,9 +5,9 @@
obj-$(CONFIG_SQUASHFS) += squashfs.o
squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
squashfs-y += namei.o super.o symlink.o decompressor.o
squashfs-y += namei.o super.o symlink.o decompressor.o page_actor.o
squashfs-$(CONFIG_SQUASHFS_FILE_CACHE) += file_cache.o
squashfs-$(CONFIG_SQUASHFS_FILE_DIRECT) += file_direct.o page_actor.o
squashfs-$(CONFIG_SQUASHFS_FILE_DIRECT) += file_direct.o
squashfs-$(CONFIG_SQUASHFS_DECOMP_SINGLE) += decompressor_single.o
squashfs-$(CONFIG_SQUASHFS_DECOMP_MULTI) += decompressor_multi.o
squashfs-$(CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU) += decompressor_multi_percpu.o

10
fs/squashfs/block.c
View file

@ -34,12 +34,15 @@ static int copy_bio_to_actor(struct bio *bio,
struct squashfs_page_actor *actor,
int offset, int req_length)
{
void *actor_addr = squashfs_first_page(actor);
void *actor_addr;
struct bvec_iter_all iter_all = {};
struct bio_vec *bvec = bvec_init_iter_all(&iter_all);
int copied_bytes = 0;
int actor_offset = 0;
squashfs_actor_nobuff(actor);
actor_addr = squashfs_first_page(actor);
if (WARN_ON_ONCE(!bio_next_segment(bio, &iter_all)))
return 0;
@ -49,8 +52,9 @@ static int copy_bio_to_actor(struct bio *bio,
bytes_to_copy = min_t(int, bytes_to_copy,
req_length - copied_bytes);
memcpy(actor_addr + actor_offset, bvec_virt(bvec) + offset,
bytes_to_copy);
if (!IS_ERR(actor_addr))
memcpy(actor_addr + actor_offset, bvec_virt(bvec) +
offset, bytes_to_copy);
actor_offset += bytes_to_copy;
copied_bytes += bytes_to_copy;

1
fs/squashfs/decompressor.h
View file

@ -20,6 +20,7 @@ struct squashfs_decompressor {
struct bio *, int, int, struct squashfs_page_actor *);
int id;
char *name;
int alloc_buffer;
int supported;
};

133
fs/squashfs/file.c
View file

@ -39,6 +39,7 @@
#include "squashfs_fs_sb.h"
#include "squashfs_fs_i.h"
#include "squashfs.h"
#include "page_actor.h"
/*
* Locate cache slot in range [offset, index] for specified inode. If
@ -496,7 +497,137 @@ static int squashfs_read_folio(struct file *file, struct folio *folio)
return res;
}
static int squashfs_readahead_fragment(struct page **page,
unsigned int pages, unsigned int expected)
{
struct inode *inode = page[0]->mapping->host;
struct squashfs_cache_entry *buffer = squashfs_get_fragment(inode->i_sb,
squashfs_i(inode)->fragment_block,
squashfs_i(inode)->fragment_size);
struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
unsigned int n, mask = (1 << (msblk->block_log - PAGE_SHIFT)) - 1;
if (buffer->error)
goto out;
expected += squashfs_i(inode)->fragment_offset;
for (n = 0; n < pages; n++) {
unsigned int base = (page[n]->index & mask) << PAGE_SHIFT;
unsigned int offset = base + squashfs_i(inode)->fragment_offset;
if (expected > offset) {
unsigned int avail = min_t(unsigned int, expected -
offset, PAGE_SIZE);
squashfs_fill_page(page[n], buffer, offset, avail);
}
unlock_page(page[n]);
put_page(page[n]);
}
out:
squashfs_cache_put(buffer);
return buffer->error;
}
static void squashfs_readahead(struct readahead_control *ractl)
{
struct inode *inode = ractl->mapping->host;
struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
size_t mask = (1UL << msblk->block_log) - 1;
unsigned short shift = msblk->block_log - PAGE_SHIFT;
loff_t start = readahead_pos(ractl) & ~mask;
size_t len = readahead_length(ractl) + readahead_pos(ractl) - start;
struct squashfs_page_actor *actor;
unsigned int nr_pages = 0;
struct page **pages;
int i, file_end = i_size_read(inode) >> msblk->block_log;
unsigned int max_pages = 1UL << shift;
readahead_expand(ractl, start, (len | mask) + 1);
pages = kmalloc_array(max_pages, sizeof(void *), GFP_KERNEL);
if (!pages)
return;
for (;;) {
pgoff_t index;
int res, bsize;
u64 block = 0;
unsigned int expected;
nr_pages = __readahead_batch(ractl, pages, max_pages);
if (!nr_pages)
break;
if (readahead_pos(ractl) >= i_size_read(inode))
goto skip_pages;
index = pages[0]->index >> shift;
if ((pages[nr_pages - 1]->index >> shift) != index)
goto skip_pages;
expected = index == file_end ?
(i_size_read(inode) & (msblk->block_size - 1)) :
msblk->block_size;
if (index == file_end && squashfs_i(inode)->fragment_block !=
SQUASHFS_INVALID_BLK) {
res = squashfs_readahead_fragment(pages, nr_pages,
expected);
if (res)
goto skip_pages;
continue;
}
bsize = read_blocklist(inode, index, &block);
if (bsize == 0)
goto skip_pages;
actor = squashfs_page_actor_init_special(msblk, pages, nr_pages,
expected);
if (!actor)
goto skip_pages;
res = squashfs_read_data(inode->i_sb, block, bsize, NULL, actor);
kfree(actor);
if (res == expected) {
int bytes;
/* Last page (if present) may have trailing bytes not filled */
bytes = res % PAGE_SIZE;
if (pages[nr_pages - 1]->index == file_end && bytes)
memzero_page(pages[nr_pages - 1], bytes,
PAGE_SIZE - bytes);
for (i = 0; i < nr_pages; i++) {
flush_dcache_page(pages[i]);
SetPageUptodate(pages[i]);
}
}
for (i = 0; i < nr_pages; i++) {
unlock_page(pages[i]);
put_page(pages[i]);
}
}
kfree(pages);
return;
skip_pages:
for (i = 0; i < nr_pages; i++) {
unlock_page(pages[i]);
put_page(pages[i]);
}
kfree(pages);
}
const struct address_space_operations squashfs_aops = {
.read_folio = squashfs_read_folio
.read_folio = squashfs_read_folio,
.readahead = squashfs_readahead
};

90
fs/squashfs/file_direct.c
View file

@ -18,9 +18,6 @@
#include "squashfs.h"
#include "page_actor.h"
static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
int pages, struct page **page, int bytes);
/* Read separately compressed datablock directly into page cache */
int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
int expected)
@ -33,7 +30,7 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
int mask = (1 << (msblk->block_log - PAGE_SHIFT)) - 1;
int start_index = target_page->index & ~mask;
int end_index = start_index | mask;
int i, n, pages, missing_pages, bytes, res = -ENOMEM;
int i, n, pages, bytes, res = -ENOMEM;
struct page **page;
struct squashfs_page_actor *actor;
void *pageaddr;
@ -47,50 +44,38 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
if (page == NULL)
return res;
/*
* Create a "page actor" which will kmap and kunmap the
* page cache pages appropriately within the decompressor
*/
actor = squashfs_page_actor_init_special(page, pages, 0);
if (actor == NULL)
goto out;
/* Try to grab all the pages covered by the Squashfs block */
for (missing_pages = 0, i = 0, n = start_index; i < pages; i++, n++) {
for (i = 0, n = start_index; n <= end_index; n++) {
page[i] = (n == target_page->index) ? target_page :
grab_cache_page_nowait(target_page->mapping, n);
if (page[i] == NULL) {
missing_pages++;
if (page[i] == NULL)
continue;
}
if (PageUptodate(page[i])) {
unlock_page(page[i]);
put_page(page[i]);
page[i] = NULL;
missing_pages++;
}
continue;
}
if (missing_pages) {
i++;
}
pages = i;
/*
* Couldn't get one or more pages, this page has either
* been VM reclaimed, but others are still in the page cache
* and uptodate, or we're racing with another thread in
* squashfs_readpage also trying to grab them. Fall back to
* using an intermediate buffer.
* Create a "page actor" which will kmap and kunmap the
* page cache pages appropriately within the decompressor
*/
res = squashfs_read_cache(target_page, block, bsize, pages,
page, expected);
if (res < 0)
goto mark_errored;
actor = squashfs_page_actor_init_special(msblk, page, pages, expected);
if (actor == NULL)
goto out;
}
/* Decompress directly into the page cache buffers */
res = squashfs_read_data(inode->i_sb, block, bsize, NULL, actor);
kfree(actor);
if (res < 0)
goto mark_errored;
@ -99,12 +84,12 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
goto mark_errored;
}
/* Last page may have trailing bytes not filled */
/* Last page (if present) may have trailing bytes not filled */
bytes = res % PAGE_SIZE;
if (bytes) {
pageaddr = kmap_atomic(page[pages - 1]);
if (page[pages - 1]->index == end_index && bytes) {
pageaddr = kmap_local_page(page[pages - 1]);
memset(pageaddr + bytes, 0, PAGE_SIZE - bytes);
kunmap_atomic(pageaddr);
kunmap_local(pageaddr);
}
/* Mark pages as uptodate, unlock and release */
@ -116,7 +101,6 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
put_page(page[i]);
}
kfree(actor);
kfree(page);
return 0;
@ -135,40 +119,6 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize,
}
out:
kfree(actor);
kfree(page);
return res;
}
static int squashfs_read_cache(struct page *target_page, u64 block, int bsize,
int pages, struct page **page, int bytes)
{
struct inode *i = target_page->mapping->host;
struct squashfs_cache_entry *buffer = squashfs_get_datablock(i->i_sb,
block, bsize);
int res = buffer->error, n, offset = 0;
if (res) {
ERROR("Unable to read page, block %llx, size %x\n", block,
bsize);
goto out;
}
for (n = 0; n < pages && bytes > 0; n++,
bytes -= PAGE_SIZE, offset += PAGE_SIZE) {
int avail = min_t(int, bytes, PAGE_SIZE);
if (page[n] == NULL)
continue;
squashfs_fill_page(page[n], buffer, offset, avail);
unlock_page(page[n]);
if (page[n] != target_page)
put_page(page[n]);
}
out:
squashfs_cache_put(buffer);
return res;
}

3
fs/squashfs/lz4_wrapper.c
View file

@ -119,9 +119,11 @@ static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm,
buff = stream->output;
while (data) {
if (bytes <= PAGE_SIZE) {
if (!IS_ERR(data))
memcpy(data, buff, bytes);
break;
}
if (!IS_ERR(data))
memcpy(data, buff, PAGE_SIZE);
buff += PAGE_SIZE;
bytes -= PAGE_SIZE;
@ -139,5 +141,6 @@ const struct squashfs_decompressor squashfs_lz4_comp_ops = {
.decompress = lz4_uncompress,
.id = LZ4_COMPRESSION,
.name = "lz4",
.alloc_buffer = 0,
.supported = 1
};

3
fs/squashfs/lzo_wrapper.c
View file

@ -93,9 +93,11 @@ static int lzo_uncompress(struct squashfs_sb_info *msblk, void *strm,
buff = stream->output;
while (data) {
if (bytes <= PAGE_SIZE) {
if (!IS_ERR(data))
memcpy(data, buff, bytes);
break;
} else {
if (!IS_ERR(data))
memcpy(data, buff, PAGE_SIZE);
buff += PAGE_SIZE;
bytes -= PAGE_SIZE;
@ -116,5 +118,6 @@ const struct squashfs_decompressor squashfs_lzo_comp_ops = {
.decompress = lzo_uncompress,
.id = LZO_COMPRESSION,
.name = "lzo",
.alloc_buffer = 0,
.supported = 1
};

55
fs/squashfs/page_actor.c
View file

@ -7,6 +7,8 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include "squashfs_fs_sb.h"
#include "decompressor.h"
#include "page_actor.h"
/*
@ -57,29 +59,62 @@ struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
}
/* Implementation of page_actor for decompressing directly into page cache. */
static void *handle_next_page(struct squashfs_page_actor *actor)
{
int max_pages = (actor->length + PAGE_SIZE - 1) >> PAGE_SHIFT;
if (actor->returned_pages == max_pages)
return NULL;
if ((actor->next_page == actor->pages) ||
(actor->next_index != actor->page[actor->next_page]->index)) {
if (actor->alloc_buffer) {
void *tmp_buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (tmp_buffer) {
actor->tmp_buffer = tmp_buffer;
actor->next_index++;
actor->returned_pages++;
return tmp_buffer;
}
}
actor->next_index++;
actor->returned_pages++;
return ERR_PTR(-ENOMEM);
}
actor->next_index++;
actor->returned_pages++;
return actor->pageaddr = kmap_local_page(actor->page[actor->next_page++]);
}
static void *direct_first_page(struct squashfs_page_actor *actor)
{
actor->next_page = 1;
return actor->pageaddr = kmap_atomic(actor->page[0]);
return handle_next_page(actor);
}
static void *direct_next_page(struct squashfs_page_actor *actor)
{
if (actor->pageaddr)
kunmap_atomic(actor->pageaddr);
kunmap_local(actor->pageaddr);
return actor->pageaddr = actor->next_page == actor->pages ? NULL :
kmap_atomic(actor->page[actor->next_page++]);
kfree(actor->tmp_buffer);
actor->pageaddr = actor->tmp_buffer = NULL;
return handle_next_page(actor);
}
static void direct_finish_page(struct squashfs_page_actor *actor)
{
if (actor->pageaddr)
kunmap_atomic(actor->pageaddr);
kunmap_local(actor->pageaddr);
kfree(actor->tmp_buffer);
}
struct squashfs_page_actor *squashfs_page_actor_init_special(struct page **page,
int pages, int length)
struct squashfs_page_actor *squashfs_page_actor_init_special(struct squashfs_sb_info *msblk,
struct page **page, int pages, int length)
{
struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
@ -90,7 +125,11 @@ struct squashfs_page_actor *squashfs_page_actor_init_special(struct page **page,
actor->page = page;
actor->pages = pages;
actor->next_page = 0;
actor->returned_pages = 0;
actor->next_index = page[0]->index & ~((1 << (msblk->block_log - PAGE_SHIFT)) - 1);
actor->pageaddr = NULL;
actor->tmp_buffer = NULL;
actor->alloc_buffer = msblk->decompressor->alloc_buffer;
actor->squashfs_first_page = direct_first_page;
actor->squashfs_next_page = direct_next_page;
actor->squashfs_finish_page = direct_finish_page;

57
fs/squashfs/page_actor.h
View file

@ -6,63 +6,29 @@
* Phillip Lougher <phillip@squashfs.org.uk>
*/
#ifndef CONFIG_SQUASHFS_FILE_DIRECT
struct squashfs_page_actor {
void **page;
int pages;
int length;
int next_page;
};
static inline struct squashfs_page_actor *squashfs_page_actor_init(void **page,
int pages, int length)
{
struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
if (actor == NULL)
return NULL;
actor->length = length ? : pages * PAGE_SIZE;
actor->page = page;
actor->pages = pages;
actor->next_page = 0;
return actor;
}
static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
{
actor->next_page = 1;
return actor->page[0];
}
static inline void *squashfs_next_page(struct squashfs_page_actor *actor)
{
return actor->next_page == actor->pages ? NULL :
actor->page[actor->next_page++];
}
static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
{
/* empty */
}
#else
struct squashfs_page_actor {
union {
void **buffer;
struct page **page;
};
void *pageaddr;
void *tmp_buffer;
void *(*squashfs_first_page)(struct squashfs_page_actor *);
void *(*squashfs_next_page)(struct squashfs_page_actor *);
void (*squashfs_finish_page)(struct squashfs_page_actor *);
int pages;
int length;
int next_page;
int alloc_buffer;
int returned_pages;
pgoff_t next_index;
};
extern struct squashfs_page_actor *squashfs_page_actor_init(void **, int, int);
extern struct squashfs_page_actor *squashfs_page_actor_init_special(struct page
**, int, int);
extern struct squashfs_page_actor *squashfs_page_actor_init(void **buffer,
int pages, int length);
extern struct squashfs_page_actor *squashfs_page_actor_init_special(
struct squashfs_sb_info *msblk,
struct page **page, int pages, int length);
static inline void *squashfs_first_page(struct squashfs_page_actor *actor)
{
return actor->squashfs_first_page(actor);
@ -75,5 +41,8 @@ static inline void squashfs_finish_page(struct squashfs_page_actor *actor)
{
actor->squashfs_finish_page(actor);
}
#endif
static inline void squashfs_actor_nobuff(struct squashfs_page_actor *actor)
{
actor->alloc_buffer = 0;
}
#endif

33
fs/squashfs/super.c
View file

@ -29,7 +29,6 @@
#include <linux/module.h>
#include <linux/magic.h>
#include <linux/xattr.h>
#include <linux/backing-dev.h>
#include "squashfs_fs.h"
#include "squashfs_fs_sb.h"
@ -113,24 +112,6 @@ static const struct squashfs_decompressor *supported_squashfs_filesystem(
return decompressor;
}
static int squashfs_bdi_init(struct super_block *sb)
{
int err;
unsigned int major = MAJOR(sb->s_dev);
unsigned int minor = MINOR(sb->s_dev);
bdi_put(sb->s_bdi);
sb->s_bdi = &noop_backing_dev_info;
err = super_setup_bdi_name(sb, "squashfs_%u_%u", major, minor);
if (err)
return err;
sb->s_bdi->ra_pages = 0;
sb->s_bdi->io_pages = 0;
return 0;
}
static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
{
@ -146,20 +127,6 @@ static int squashfs_fill_super(struct super_block *sb, struct fs_context *fc)
TRACE("Entered squashfs_fill_superblock\n");
/*
* squashfs provides 'backing_dev_info' in order to disable read-ahead. For
* squashfs, I/O is not deferred, it is done immediately in read_folio,
* which means the user would always have to wait their own I/O. So the effect
* of readahead is very weak for squashfs. squashfs_bdi_init will set
* sb->s_bdi->ra_pages and sb->s_bdi->io_pages to 0 and close readahead for
* squashfs.
*/
err = squashfs_bdi_init(sb);
if (err) {
errorf(fc, "squashfs init bdi failed");
return err;
}
sb->s_fs_info = kzalloc(sizeof(*msblk), GFP_KERNEL);
if (sb->s_fs_info == NULL) {
ERROR("Failed to allocate squashfs_sb_info\n");

11
fs/squashfs/xz_wrapper.c
View file

@ -131,6 +131,10 @@ static int squashfs_xz_uncompress(struct squashfs_sb_info *msblk, void *strm,
stream->buf.out_pos = 0;
stream->buf.out_size = PAGE_SIZE;
stream->buf.out = squashfs_first_page(output);
if (IS_ERR(stream->buf.out)) {
error = PTR_ERR(stream->buf.out);
goto finish;
}
for (;;) {
enum xz_ret xz_err;
@ -156,7 +160,10 @@ static int squashfs_xz_uncompress(struct squashfs_sb_info *msblk, void *strm,
if (stream->buf.out_pos == stream->buf.out_size) {
stream->buf.out = squashfs_next_page(output);
if (stream->buf.out != NULL) {
if (IS_ERR(stream->buf.out)) {
error = PTR_ERR(stream->buf.out);
break;
} else if (stream->buf.out != NULL) {
stream->buf.out_pos = 0;
total += PAGE_SIZE;
}
@ -171,6 +178,7 @@ static int squashfs_xz_uncompress(struct squashfs_sb_info *msblk, void *strm,
}
}
finish:
squashfs_finish_page(output);
return error ? error : total + stream->buf.out_pos;
@ -183,5 +191,6 @@ const struct squashfs_decompressor squashfs_xz_comp_ops = {
.decompress = squashfs_xz_uncompress,
.id = XZ_COMPRESSION,
.name = "xz",
.alloc_buffer = 1,
.supported = 1
};

12
fs/squashfs/zlib_wrapper.c
View file

@ -62,6 +62,11 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
stream->next_out = squashfs_first_page(output);
stream->avail_in = 0;
if (IS_ERR(stream->next_out)) {
error = PTR_ERR(stream->next_out);
goto finish;
}
for (;;) {
int zlib_err;
@ -85,7 +90,10 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
if (stream->avail_out == 0) {
stream->next_out = squashfs_next_page(output);
if (stream->next_out != NULL)
if (IS_ERR(stream->next_out)) {
error = PTR_ERR(stream->next_out);
break;
} else if (stream->next_out != NULL)
stream->avail_out = PAGE_SIZE;
}
@ -107,6 +115,7 @@ static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
}
}
finish:
squashfs_finish_page(output);
if (!error)
@ -122,6 +131,7 @@ const struct squashfs_decompressor squashfs_zlib_comp_ops = {
.decompress = zlib_uncompress,
.id = ZLIB_COMPRESSION,
.name = "zlib",
.alloc_buffer = 1,
.supported = 1
};

12
fs/squashfs/zstd_wrapper.c
View file

@ -80,6 +80,10 @@ static int zstd_uncompress(struct squashfs_sb_info *msblk, void *strm,
out_buf.size = PAGE_SIZE;
out_buf.dst = squashfs_first_page(output);
if (IS_ERR(out_buf.dst)) {
error = PTR_ERR(out_buf.dst);
goto finish;
}
for (;;) {
size_t zstd_err;
@ -104,7 +108,10 @@ static int zstd_uncompress(struct squashfs_sb_info *msblk, void *strm,
if (out_buf.pos == out_buf.size) {
out_buf.dst = squashfs_next_page(output);
if (out_buf.dst == NULL) {
if (IS_ERR(out_buf.dst)) {
error = PTR_ERR(out_buf.dst);
break;
} else if (out_buf.dst == NULL) {
/* Shouldn't run out of pages
* before stream is done.
*/
@ -129,6 +136,8 @@ static int zstd_uncompress(struct squashfs_sb_info *msblk, void *strm,
}
}
finish:
squashfs_finish_page(output);
return error ? error : total_out;
@ -140,5 +149,6 @@ const struct squashfs_decompressor squashfs_zstd_comp_ops = {
.decompress = zstd_uncompress,
.id = ZSTD_COMPRESSION,
.name = "zstd",
.alloc_buffer = 1,
.supported = 1
};

7
include/linux/backing-dev-defs.h
View file

@ -28,11 +28,6 @@ enum wb_state {
WB_start_all, /* nr_pages == 0 (all) work pending */
};
enum wb_congested_state {
WB_async_congested, /* The async (write) queue is getting full */
WB_sync_congested, /* The sync queue is getting full */
};
enum wb_stat_item {
WB_RECLAIMABLE,
WB_WRITEBACK,
@ -122,8 +117,6 @@ struct bdi_writeback {
atomic_t writeback_inodes; /* number of inodes under writeback */
struct percpu_counter stat[NR_WB_STAT_ITEMS];
unsigned long congested; /* WB_[a]sync_congested flags */
unsigned long bw_time_stamp; /* last time write bw is updated */
unsigned long dirtied_stamp;
unsigned long written_stamp; /* pages written at bw_time_stamp */

11
include/linux/compiler-gcc.h
View file

@ -66,17 +66,6 @@
__builtin_unreachable(); \
} while (0)
/*
* GCC 'asm goto' miscompiles certain code sequences:
*
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670
*
* Work it around via a compiler barrier quirk suggested by Jakub Jelinek.
*
* (asm goto is automatically volatile - the naming reflects this.)
*/
#define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0)
#if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP)
#define __HAVE_BUILTIN_BSWAP32__
#define __HAVE_BUILTIN_BSWAP64__

108
include/linux/cpumask.h
View file

@ -116,85 +116,6 @@ static __always_inline unsigned int cpumask_check(unsigned int cpu)
return cpu;
}
#if NR_CPUS == 1
/* Uniprocessor. Assume all masks are "1". */
static inline unsigned int cpumask_first(const struct cpumask *srcp)
{
return 0;
}
static inline unsigned int cpumask_first_zero(const struct cpumask *srcp)
{
return 0;
}
static inline unsigned int cpumask_first_and(const struct cpumask *srcp1,
const struct cpumask *srcp2)
{
return 0;
}
static inline unsigned int cpumask_last(const struct cpumask *srcp)
{
return 0;
}
/* Valid inputs for n are -1 and 0. */
static inline unsigned int cpumask_next(int n, const struct cpumask *srcp)
{
return n+1;
}
static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp)
{
return n+1;
}
static inline unsigned int cpumask_next_and(int n,
const struct cpumask *srcp,
const struct cpumask *andp)
{
return n+1;
}
static inline unsigned int cpumask_next_wrap(int n, const struct cpumask *mask,
int start, bool wrap)
{
/* cpu0 unless stop condition, wrap and at cpu0, then nr_cpumask_bits */
return (wrap && n == 0);
}
/* cpu must be a valid cpu, ie 0, so there's no other choice. */
static inline unsigned int cpumask_any_but(const struct cpumask *mask,
unsigned int cpu)
{
return 1;
}
static inline unsigned int cpumask_local_spread(unsigned int i, int node)
{
return 0;
}
static inline int cpumask_any_and_distribute(const struct cpumask *src1p,
const struct cpumask *src2p) {
return cpumask_first_and(src1p, src2p);
}
static inline int cpumask_any_distribute(const struct cpumask *srcp)
{
return cpumask_first(srcp);
}
#define for_each_cpu(cpu, mask) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
#define for_each_cpu_not(cpu, mask) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
#define for_each_cpu_wrap(cpu, mask, start) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask, (void)(start))
#define for_each_cpu_and(cpu, mask1, mask2) \
for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask1, (void)mask2)
#else
/**
* cpumask_first - get the first cpu in a cpumask
* @srcp: the cpumask pointer
@ -260,10 +181,29 @@ static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp)
int __pure cpumask_next_and(int n, const struct cpumask *, const struct cpumask *);
int __pure cpumask_any_but(const struct cpumask *mask, unsigned int cpu);
#if NR_CPUS == 1
/* Uniprocessor: there is only one valid CPU */
static inline unsigned int cpumask_local_spread(unsigned int i, int node)
{
return 0;
}
static inline int cpumask_any_and_distribute(const struct cpumask *src1p,
const struct cpumask *src2p) {
return cpumask_first_and(src1p, src2p);
}
static inline int cpumask_any_distribute(const struct cpumask *srcp)
{
return cpumask_first(srcp);
}
#else
unsigned int cpumask_local_spread(unsigned int i, int node);
int cpumask_any_and_distribute(const struct cpumask *src1p,
const struct cpumask *src2p);
int cpumask_any_distribute(const struct cpumask *srcp);
#endif /* NR_CPUS */
/**
* for_each_cpu - iterate over every cpu in a mask
@ -289,7 +229,7 @@ int cpumask_any_distribute(const struct cpumask *srcp);
(cpu) = cpumask_next_zero((cpu), (mask)), \
(cpu) < nr_cpu_ids;)
extern int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap);
int __pure cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool wrap);
/**
* for_each_cpu_wrap - iterate over every cpu in a mask, starting at a specified location
@ -324,7 +264,6 @@ extern int cpumask_next_wrap(int n, const struct cpumask *mask, int start, bool
for ((cpu) = -1; \
(cpu) = cpumask_next_and((cpu), (mask1), (mask2)), \
(cpu) < nr_cpu_ids;)
#endif /* SMP */
#define CPU_BITS_NONE \
{ \
@ -811,9 +750,16 @@ extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS);
/* First bits of cpu_bit_bitmap are in fact unset. */
#define cpu_none_mask to_cpumask(cpu_bit_bitmap[0])
#if NR_CPUS == 1
/* Uniprocessor: the possible/online/present masks are always "1" */
#define for_each_possible_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++)
#define for_each_online_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++)
#define for_each_present_cpu(cpu) for ((cpu) = 0; (cpu) < 1; (cpu)++)
#else
#define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask)
#define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask)
#define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask)
#endif
/* Wrappers for arch boot code to manipulate normally-constant masks */
void init_cpu_present(const struct cpumask *src);

8
include/linux/kernel_read_file.h
View file

@ -35,19 +35,19 @@ static inline const char *kernel_read_file_id_str(enum kernel_read_file_id id)
return kernel_read_file_str[id];
}
int kernel_read_file(struct file *file, loff_t offset,
ssize_t kernel_read_file(struct file *file, loff_t offset,
void **buf, size_t buf_size,
size_t *file_size,
enum kernel_read_file_id id);
int kernel_read_file_from_path(const char *path, loff_t offset,
ssize_t kernel_read_file_from_path(const char *path, loff_t offset,
void **buf, size_t buf_size,
size_t *file_size,
enum kernel_read_file_id id);
int kernel_read_file_from_path_initns(const char *path, loff_t offset,
ssize_t kernel_read_file_from_path_initns(const char *path, loff_t offset,
void **buf, size_t buf_size,
size_t *file_size,
enum kernel_read_file_id id);
int kernel_read_file_from_fd(int fd, loff_t offset,
ssize_t kernel_read_file_from_fd(int fd, loff_t offset,
void **buf, size_t buf_size,
size_t *file_size,
enum kernel_read_file_id id);

2
include/linux/kfifo.h
View file

@ -688,7 +688,7 @@ __kfifo_uint_must_check_helper( \
* writer, you don't need extra locking to use these macro.
*/
#define kfifo_to_user(fifo, to, len, copied) \
__kfifo_uint_must_check_helper( \
__kfifo_int_must_check_helper( \
({ \
typeof((fifo) + 1) __tmp = (fifo); \
void __user *__to = (to); \

1
include/linux/limits.h
View file

@ -7,6 +7,7 @@
#include <vdso/limits.h>
#define SIZE_MAX (~(size_t)0)
#define SSIZE_MAX ((ssize_t)(SIZE_MAX >> 1))
#define PHYS_ADDR_MAX (~(phys_addr_t)0)
#define U8_MAX ((u8)~0U)

2
include/linux/net.h
View file

@ -307,8 +307,6 @@ do { \
#define net_get_random_once(buf, nbytes) \
get_random_once((buf), (nbytes))
#define net_get_random_once_wait(buf, nbytes) \
get_random_once_wait((buf), (nbytes))
/*
* E.g. XFS meta- & log-data is in slab pages, or bcache meta

2
include/linux/once.h
View file

@ -54,7 +54,5 @@ void __do_once_done(bool *done, struct static_key_true *once_key,
#define get_random_once(buf, nbytes) \
DO_ONCE(get_random_bytes, (buf), (nbytes))
#define get_random_once_wait(buf, nbytes) \
DO_ONCE(get_random_bytes_wait, (buf), (nbytes)) \
#endif /* _LINUX_ONCE_H */

2
include/linux/rbtree.h
View file

@ -17,9 +17,9 @@
#ifndef _LINUX_RBTREE_H
#define _LINUX_RBTREE_H
#include <linux/container_of.h>
#include <linux/rbtree_types.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/rcupdate.h>

6
include/uapi/linux/swab.h
View file

@ -102,7 +102,7 @@ static inline __attribute_const__ __u32 __fswahb32(__u32 val)
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
#else
#define __swab16(x) \
(__builtin_constant_p((__u16)(x)) ? \
(__u16)(__builtin_constant_p(x) ? \
___constant_swab16(x) : \
__fswab16(x))
#endif
@ -115,7 +115,7 @@ static inline __attribute_const__ __u32 __fswahb32(__u32 val)
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
#else
#define __swab32(x) \
(__builtin_constant_p((__u32)(x)) ? \
(__u32)(__builtin_constant_p(x) ? \
___constant_swab32(x) : \
__fswab32(x))
#endif
@ -128,7 +128,7 @@ static inline __attribute_const__ __u32 __fswahb32(__u32 val)
#define __swab64(x) (__u64)__builtin_bswap64((__u64)(x))
#else
#define __swab64(x) \
(__builtin_constant_p((__u64)(x)) ? \
(__u64)(__builtin_constant_p(x) ? \
___constant_swab64(x) : \
__fswab64(x))
#endif

17
init/version.c
View file

@ -11,6 +11,8 @@
#include <linux/build-salt.h>
#include <linux/elfnote-lto.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/printk.h>
#include <linux/uts.h>
#include <linux/utsname.h>
#include <generated/utsrelease.h>
@ -35,6 +37,21 @@ struct uts_namespace init_uts_ns = {
};
EXPORT_SYMBOL_GPL(init_uts_ns);
static int __init early_hostname(char *arg)
{
size_t bufsize = sizeof(init_uts_ns.name.nodename);
size_t maxlen = bufsize - 1;
size_t arglen;
arglen = strlcpy(init_uts_ns.name.nodename, arg, bufsize);
if (arglen > maxlen) {
pr_warn("hostname parameter exceeds %zd characters and will be truncated",
maxlen);
}
return 0;
}
early_param("hostname", early_hostname);
/* FIXED STRINGS! Don't touch! */
const char linux_banner[] =
"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"

2
ipc/mqueue.c
View file

@ -489,7 +489,7 @@ static struct vfsmount *mq_create_mount(struct ipc_namespace *ns)
static void init_once(void *foo)
{
struct mqueue_inode_info *p = (struct mqueue_inode_info *) foo;
struct mqueue_inode_info *p = foo;
inode_init_once(&p->vfs_inode);
}

28
kernel/crash_core.c
View file

@ -9,12 +9,15 @@
#include <linux/init.h>
#include <linux/utsname.h>
#include <linux/vmalloc.h>
#include <linux/sizes.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <crypto/sha1.h>
#include "kallsyms_internal.h"
/* vmcoreinfo stuff */
unsigned char *vmcoreinfo_data;
size_t vmcoreinfo_size;
@ -43,6 +46,15 @@ static int __init parse_crashkernel_mem(char *cmdline,
unsigned long long *crash_base)
{
char *cur = cmdline, *tmp;
unsigned long long total_mem = system_ram;
/*
* Firmware sometimes reserves some memory regions for its own use,
* so the system memory size is less than the actual physical memory
* size. Work around this by rounding up the total size to 128M,
* which is enough for most test cases.
*/
total_mem = roundup(total_mem, SZ_128M);
/* for each entry of the comma-separated list */
do {
@ -87,13 +99,13 @@ static int __init parse_crashkernel_mem(char *cmdline,
return -EINVAL;
}
cur = tmp;
if (size >= system_ram) {
if (size >= total_mem) {
pr_warn("crashkernel: invalid size\n");
return -EINVAL;
}
/* match ? */
if (system_ram >= start && system_ram < end) {
if (total_mem >= start && total_mem < end) {
*crash_size = size;
break;
}
@ -480,6 +492,18 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
#endif
#ifdef CONFIG_KALLSYMS
VMCOREINFO_SYMBOL(kallsyms_names);
VMCOREINFO_SYMBOL(kallsyms_token_table);
VMCOREINFO_SYMBOL(kallsyms_token_index);
#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
VMCOREINFO_SYMBOL(kallsyms_offsets);
VMCOREINFO_SYMBOL(kallsyms_relative_base);
#else
VMCOREINFO_SYMBOL(kallsyms_addresses);
#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
#endif /* CONFIG_KALLSYMS */
arch_crash_save_vmcoreinfo();
update_vmcoreinfo_note();

2
kernel/hung_task.c
View file

@ -229,7 +229,7 @@ static long hung_timeout_jiffies(unsigned long last_checked,
* Process updating of timeout sysctl
*/
static int proc_dohung_task_timeout_secs(struct ctl_table *table, int write,
void __user *buffer,
void *buffer,
size_t *lenp, loff_t *ppos)
{
int ret;

23
kernel/kallsyms.c
View file

@ -32,28 +32,7 @@
#include <linux/bsearch.h>
#include <linux/btf_ids.h>
/*
* These will be re-linked against their real values
* during the second link stage.
*/
extern const unsigned long kallsyms_addresses[] __weak;
extern const int kallsyms_offsets[] __weak;
extern const u8 kallsyms_names[] __weak;
/*
* Tell the compiler that the count isn't in the small data section if the arch
* has one (eg: FRV).
*/
extern const unsigned int kallsyms_num_syms
__section(".rodata") __attribute__((weak));
extern const unsigned long kallsyms_relative_base
__section(".rodata") __attribute__((weak));
extern const char kallsyms_token_table[] __weak;
extern const u16 kallsyms_token_index[] __weak;
extern const unsigned int kallsyms_markers[] __weak;
#include "kallsyms_internal.h"
/*
* Expand a compressed symbol data into the resulting uncompressed string,

30
kernel/kallsyms_internal.h Normal file
View file

@ -0,0 +1,30 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LINUX_KALLSYMS_INTERNAL_H_
#define LINUX_KALLSYMS_INTERNAL_H_
#include <linux/types.h>
/*
* These will be re-linked against their real values
* during the second link stage.
*/
extern const unsigned long kallsyms_addresses[] __weak;
extern const int kallsyms_offsets[] __weak;
extern const u8 kallsyms_names[] __weak;
/*
* Tell the compiler that the count isn't in the small data section if the arch
* has one (eg: FRV).
*/
extern const unsigned int kallsyms_num_syms
__section(".rodata") __attribute__((weak));
extern const unsigned long kallsyms_relative_base
__section(".rodata") __attribute__((weak));
extern const char kallsyms_token_table[] __weak;
extern const u16 kallsyms_token_index[] __weak;
extern const unsigned int kallsyms_markers[] __weak;
#endif // LINUX_KALLSYMS_INTERNAL_H_

10
kernel/kexec_file.c
View file

@ -40,6 +40,9 @@ void set_kexec_sig_enforced(void)
static int kexec_calculate_store_digests(struct kimage *image);
/* Maximum size in bytes for kernel/initrd files. */
#define KEXEC_FILE_SIZE_MAX min_t(s64, 4LL << 30, SSIZE_MAX)
/*
* Currently this is the only default function that is exported as some
* architectures need it to do additional handlings.
@ -190,11 +193,12 @@ kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd,
const char __user *cmdline_ptr,
unsigned long cmdline_len, unsigned flags)
{
int ret;
ssize_t ret;
void *ldata;
ret = kernel_read_file_from_fd(kernel_fd, 0, &image->kernel_buf,
INT_MAX, NULL, READING_KEXEC_IMAGE);
KEXEC_FILE_SIZE_MAX, NULL,
READING_KEXEC_IMAGE);
if (ret < 0)
return ret;
image->kernel_buf_len = ret;
@ -214,7 +218,7 @@ kimage_file_prepare_segments(struct kimage *image, int kernel_fd, int initrd_fd,
/* It is possible that there no initramfs is being loaded */
if (!(flags & KEXEC_FILE_NO_INITRAMFS)) {
ret = kernel_read_file_from_fd(initrd_fd, 0, &image->initrd_buf,
INT_MAX, NULL,
KEXEC_FILE_SIZE_MAX, NULL,
READING_KEXEC_INITRAMFS);
if (ret < 0)
goto out;

15
kernel/profile.c
View file

@ -109,6 +109,13 @@ int __ref profile_init(void)
/* only text is profiled */
prof_len = (_etext - _stext) >> prof_shift;
if (!prof_len) {
pr_warn("profiling shift: %u too large\n", prof_shift);
prof_on = 0;
return -EINVAL;
}
buffer_bytes = prof_len*sizeof(atomic_t);
if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
@ -418,6 +425,12 @@ read_profile(struct file *file, char __user *buf, size_t count, loff_t *ppos)
return read;
}
/* default is to not implement this call */
int __weak setup_profiling_timer(unsigned mult)
{
return -EINVAL;
}
/*
* Writing to /proc/profile resets the counters
*
@ -428,8 +441,6 @@ static ssize_t write_profile(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
#ifdef CONFIG_SMP
extern int setup_profiling_timer(unsigned int multiplier);
if (count == sizeof(int)) {
unsigned int multiplier;

9
lib/Kconfig
View file

@ -692,15 +692,6 @@ config STACKDEPOT_ALWAYS_INIT
bool
select STACKDEPOT
config STACK_HASH_ORDER
int "stack depot hash size (12 => 4KB, 20 => 1024KB)"
range 12 20
default 20
depends on STACKDEPOT
help
Select the hash size as a power of 2 for the stackdepot hash table.
Choose a lower value to reduce the memory impact.
config REF_TRACKER
bool
depends on STACKTRACE_SUPPORT

9
lib/Kconfig.debug
View file

@ -2029,6 +2029,15 @@ config LKDTM
Documentation on how to use the module can be found in
Documentation/fault-injection/provoke-crashes.rst
config TEST_CPUMASK
tristate "cpumask tests" if !KUNIT_ALL_TESTS
depends on KUNIT
default KUNIT_ALL_TESTS
help
Enable to turn on cpumask tests, running at boot or module load time.
If unsure, say N.
config TEST_LIST_SORT
tristate "Linked list sorting test" if !KUNIT_ALL_TESTS
depends on KUNIT

4
lib/Makefile
View file

@ -34,10 +34,9 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
is_single_threaded.o plist.o decompress.o kobject_uevent.o \
earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
nmi_backtrace.o nodemask.o win_minmax.o memcat_p.o \
buildid.o
buildid.o cpumask.o
lib-$(CONFIG_PRINTK) += dump_stack.o
lib-$(CONFIG_SMP) += cpumask.o
lib-y += kobject.o klist.o
obj-y += lockref.o
@ -100,6 +99,7 @@ obj-$(CONFIG_TEST_HMM) += test_hmm.o
obj-$(CONFIG_TEST_FREE_PAGES) += test_free_pages.o
obj-$(CONFIG_KPROBES_SANITY_TEST) += test_kprobes.o
obj-$(CONFIG_TEST_REF_TRACKER) += test_ref_tracker.o
obj-$(CONFIG_TEST_CPUMASK) += test_cpumask.o
CFLAGS_test_fprobe.o += $(CC_FLAGS_FTRACE)
obj-$(CONFIG_FPROBE_SANITY_TEST) += test_fprobe.o
#

30
lib/btree.c
View file

@ -238,7 +238,7 @@ static int keyzero(struct btree_geo *geo, unsigned long *key)
return 1;
}
void *btree_lookup(struct btree_head *head, struct btree_geo *geo,
static void *btree_lookup_node(struct btree_head *head, struct btree_geo *geo,
unsigned long *key)
{
int i, height = head->height;
@ -257,7 +257,16 @@ void *btree_lookup(struct btree_head *head, struct btree_geo *geo,
if (!node)
return NULL;
}
return node;
}
void *btree_lookup(struct btree_head *head, struct btree_geo *geo,
unsigned long *key)
{
int i;
unsigned long *node;
node = btree_lookup_node(head, geo, key);
if (!node)
return NULL;
@ -271,23 +280,10 @@ EXPORT_SYMBOL_GPL(btree_lookup);
int btree_update(struct btree_head *head, struct btree_geo *geo,
unsigned long *key, void *val)
{
int i, height = head->height;
unsigned long *node = head->node;
if (height == 0)
return -ENOENT;
for ( ; height > 1; height--) {
for (i = 0; i < geo->no_pairs; i++)
if (keycmp(geo, node, i, key) <= 0)
break;
if (i == geo->no_pairs)
return -ENOENT;
node = bval(geo, node, i);
if (!node)
return -ENOENT;
}
int i;
unsigned long *node;
node = btree_lookup_node(head, geo, key);
if (!node)
return -ENOENT;

2
lib/cpumask.c
View file

@ -192,6 +192,7 @@ void __init free_bootmem_cpumask_var(cpumask_var_t mask)
}
#endif
#if NR_CPUS > 1
/**
* cpumask_local_spread - select the i'th cpu with local numa cpu's first
* @i: index number
@ -279,3 +280,4 @@ int cpumask_any_distribute(const struct cpumask *srcp)
return next;
}
EXPORT_SYMBOL(cpumask_any_distribute);
#endif /* NR_CPUS */

15
lib/devres.c
View file

@ -29,7 +29,8 @@ static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
{
void __iomem **ptr, *addr = NULL;
ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL,
dev_to_node(dev));
if (!ptr)
return NULL;
@ -292,7 +293,8 @@ void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
{
void __iomem **ptr, *addr;
ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL,
dev_to_node(dev));
if (!ptr)
return NULL;
@ -366,7 +368,8 @@ void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
if (dr)
return dr->table;
new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
new_dr = devres_alloc_node(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL,
dev_to_node(&pdev->dev));
if (!new_dr)
return NULL;
dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
@ -548,7 +551,8 @@ int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long
int *mtrr;
int ret;
mtrr = devres_alloc(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL);
mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL,
dev_to_node(dev));
if (!mtrr)
return -ENOMEM;
@ -593,7 +597,8 @@ int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start,
struct arch_io_reserve_memtype_wc_devres *dr;
int ret;
dr = devres_alloc(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL);
dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL,
dev_to_node(dev));
if (!dr)
return -ENOMEM;

28
lib/error-inject.c
View file

@ -40,12 +40,18 @@ bool within_error_injection_list(unsigned long addr)
int get_injectable_error_type(unsigned long addr)
{
struct ei_entry *ent;
int ei_type = EI_ETYPE_NONE;
mutex_lock(&ei_mutex);
list_for_each_entry(ent, &error_injection_list, list) {
if (addr >= ent->start_addr && addr < ent->end_addr)
return ent->etype;
if (addr >= ent->start_addr && addr < ent->end_addr) {
ei_type = ent->etype;
break;
}
return EI_ETYPE_NONE;
}
mutex_unlock(&ei_mutex);
return ei_type;
}
/*
@ -197,24 +203,14 @@ static int ei_seq_show(struct seq_file *m, void *v)
return 0;
}
static const struct seq_operations ei_seq_ops = {
static const struct seq_operations ei_sops = {
.start = ei_seq_start,
.next = ei_seq_next,
.stop = ei_seq_stop,
.show = ei_seq_show,
};
static int ei_open(struct inode *inode, struct file *filp)
{
return seq_open(filp, &ei_seq_ops);
}
static const struct file_operations debugfs_ei_ops = {
.open = ei_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release,
};
DEFINE_SEQ_ATTRIBUTE(ei);
static int __init ei_debugfs_init(void)
{
@ -224,7 +220,7 @@ static int __init ei_debugfs_init(void)
if (!dir)
return -ENOMEM;
file = debugfs_create_file("list", 0444, dir, NULL, &debugfs_ei_ops);
file = debugfs_create_file("list", 0444, dir, NULL, &ei_fops);
if (!file) {
debugfs_remove(dir);
return -ENOMEM;

10
lib/flex_proportions.c
View file

@ -63,18 +63,13 @@ void fprop_global_destroy(struct fprop_global *p)
*/
bool fprop_new_period(struct fprop_global *p, int periods)
{
s64 events;
unsigned long flags;
s64 events = percpu_counter_sum(&p->events);
local_irq_save(flags);
events = percpu_counter_sum(&p->events);
/*
* Don't do anything if there are no events.
*/
if (events <= 1) {
local_irq_restore(flags);
if (events <= 1)
return false;
}
write_seqcount_begin(&p->sequence);
if (periods < 64)
events -= events >> periods;
@ -82,7 +77,6 @@ bool fprop_new_period(struct fprop_global *p, int periods)
percpu_counter_add(&p->events, -events);
p->period += periods;
write_seqcount_end(&p->sequence);
local_irq_restore(flags);
return true;
}

12
lib/list_debug.c
View file

@ -20,7 +20,11 @@
bool __list_add_valid(struct list_head *new, struct list_head *prev,
struct list_head *next)
{
if (CHECK_DATA_CORRUPTION(next->prev != prev,
if (CHECK_DATA_CORRUPTION(prev == NULL,
"list_add corruption. prev is NULL.\n") ||
CHECK_DATA_CORRUPTION(next == NULL,
"list_add corruption. next is NULL.\n") ||
CHECK_DATA_CORRUPTION(next->prev != prev,
"list_add corruption. next->prev should be prev (%px), but was %px. (next=%px).\n",
prev, next->prev, next) ||
CHECK_DATA_CORRUPTION(prev->next != next,
@ -42,7 +46,11 @@ bool __list_del_entry_valid(struct list_head *entry)
prev = entry->prev;
next = entry->next;
if (CHECK_DATA_CORRUPTION(next == LIST_POISON1,
if (CHECK_DATA_CORRUPTION(next == NULL,
"list_del corruption, %px->next is NULL\n", entry) ||
CHECK_DATA_CORRUPTION(prev == NULL,
"list_del corruption, %px->prev is NULL\n", entry) ||
CHECK_DATA_CORRUPTION(next == LIST_POISON1,
"list_del corruption, %px->next is LIST_POISON1 (%px)\n",
entry, LIST_POISON1) ||
CHECK_DATA_CORRUPTION(prev == LIST_POISON2,

4
lib/lru_cache.c
View file

@ -147,8 +147,8 @@ struct lru_cache *lc_create(const char *name, struct kmem_cache *cache,
return lc;
/* else: could not allocate all elements, give up */
for (i--; i; i--) {
void *p = element[i];
while (i) {
void *p = element[--i];
kmem_cache_free(cache, p - e_off);
}
kfree(lc);

2
lib/lz4/lz4_decompress.c
View file

@ -507,7 +507,7 @@ static int LZ4_decompress_safe_withSmallPrefix(const char *source, char *dest,
(BYTE *)dest - prefixSize, NULL, 0);
}
int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
static int LZ4_decompress_safe_forceExtDict(const char *source, char *dest,
int compressedSize, int maxOutputSize,
const void *dictStart, size_t dictSize)
{

6
lib/lzo/lzo1x_compress.c
View file

@ -50,9 +50,7 @@ lzo1x_1_do_compress(const unsigned char *in, size_t in_len,
if (dv == 0 && bitstream_version) {
const unsigned char *ir = ip + 4;
const unsigned char *limit = ip_end
< (ip + MAX_ZERO_RUN_LENGTH + 1)
? ip_end : ip + MAX_ZERO_RUN_LENGTH + 1;
const unsigned char *limit = min(ip_end, ip + MAX_ZERO_RUN_LENGTH + 1);
#if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && \
defined(LZO_FAST_64BIT_MEMORY_ACCESS)
u64 dv64;
@ -326,7 +324,7 @@ static int lzogeneric1x_1_compress(const unsigned char *in, size_t in_len,
data_start = op;
while (l > 20) {
size_t ll = l <= (m4_max_offset + 1) ? l : (m4_max_offset + 1);
size_t ll = min_t(size_t, l, m4_max_offset + 1);
uintptr_t ll_end = (uintptr_t) ip + ll;
if ((ll_end + ((t + ll) >> 5)) <= ll_end)
break;

2
lib/mpi/mpiutil.c
View file

@ -272,7 +272,7 @@ MPI mpi_set_ui(MPI w, unsigned long u)
if (!w)
w = mpi_alloc(1);
/* FIXME: If U is 0 we have no need to resize and thus possible
* allocating the the limbs.
* allocating the limbs.
*/
RESIZE_IF_NEEDED(w, 1);
w->d[0] = u;

4
lib/radix-tree.c
View file

@ -677,7 +677,7 @@ static void radix_tree_free_nodes(struct radix_tree_node *node)
}
static inline int insert_entries(struct radix_tree_node *node,
void __rcu **slot, void *item, bool replace)
void __rcu **slot, void *item)
{
if (*slot)
return -EEXIST;
@ -711,7 +711,7 @@ int radix_tree_insert(struct radix_tree_root *root, unsigned long index,
if (error)
return error;
error = insert_entries(node, slot, item, false);
error = insert_entries(node, slot, item);
if (error < 0)
return error;

4
lib/scatterlist.c
View file

@ -240,7 +240,7 @@ EXPORT_SYMBOL(__sg_free_table);
**/
void sg_free_append_table(struct sg_append_table *table)
{
__sg_free_table(&table->sgt, SG_MAX_SINGLE_ALLOC, false, sg_kfree,
__sg_free_table(&table->sgt, SG_MAX_SINGLE_ALLOC, 0, sg_kfree,
table->total_nents);
}
EXPORT_SYMBOL(sg_free_append_table);
@ -253,7 +253,7 @@ EXPORT_SYMBOL(sg_free_append_table);
**/
void sg_free_table(struct sg_table *table)
{
__sg_free_table(table, SG_MAX_SINGLE_ALLOC, false, sg_kfree,
__sg_free_table(table, SG_MAX_SINGLE_ALLOC, 0, sg_kfree,
table->orig_nents);
}
EXPORT_SYMBOL(sg_free_table);

2
lib/smp_processor_id.c
View file

@ -47,9 +47,9 @@ unsigned int check_preemption_disabled(const char *what1, const char *what2)
printk("caller is %pS\n", __builtin_return_address(0));
dump_stack();
instrumentation_end();
out_enable:
instrumentation_end();
preempt_enable_no_resched_notrace();
out:
return this_cpu;

59
lib/stackdepot.c
View file

@ -32,6 +32,7 @@
#include <linux/string.h>
#include <linux/types.h>
#include <linux/memblock.h>
#include <linux/kasan-enabled.h>
#define DEPOT_STACK_BITS (sizeof(depot_stack_handle_t) * 8)
@ -145,10 +146,16 @@ depot_alloc_stack(unsigned long *entries, int size, u32 hash, void **prealloc)
return stack;
}
#define STACK_HASH_SIZE (1L << CONFIG_STACK_HASH_ORDER)
#define STACK_HASH_MASK (STACK_HASH_SIZE - 1)
/* one hash table bucket entry per 16kB of memory */
#define STACK_HASH_SCALE 14
/* limited between 4k and 1M buckets */
#define STACK_HASH_ORDER_MIN 12
#define STACK_HASH_ORDER_MAX 20
#define STACK_HASH_SEED 0x9747b28c
static unsigned int stack_hash_order;
static unsigned int stack_hash_mask;
static bool stack_depot_disable;
static struct stack_record **stack_table;
@ -175,7 +182,7 @@ void __init stack_depot_want_early_init(void)
int __init stack_depot_early_init(void)
{
size_t size;
unsigned long entries = 0;
/* This is supposed to be called only once, from mm_init() */
if (WARN_ON(__stack_depot_early_init_passed))
@ -183,13 +190,23 @@ int __init stack_depot_early_init(void)
__stack_depot_early_init_passed = true;
if (kasan_enabled() && !stack_hash_order)
stack_hash_order = STACK_HASH_ORDER_MAX;
if (!__stack_depot_want_early_init || stack_depot_disable)
return 0;
size = (STACK_HASH_SIZE * sizeof(struct stack_record *));
pr_info("Stack Depot early init allocating hash table with memblock_alloc, %zu bytes\n",
size);
stack_table = memblock_alloc(size, SMP_CACHE_BYTES);
if (stack_hash_order)
entries = 1UL << stack_hash_order;
stack_table = alloc_large_system_hash("stackdepot",
sizeof(struct stack_record *),
entries,
STACK_HASH_SCALE,
HASH_EARLY | HASH_ZERO,
NULL,
&stack_hash_mask,
1UL << STACK_HASH_ORDER_MIN,
1UL << STACK_HASH_ORDER_MAX);
if (!stack_table) {
pr_err("Stack Depot hash table allocation failed, disabling\n");
@ -207,13 +224,35 @@ int stack_depot_init(void)
mutex_lock(&stack_depot_init_mutex);
if (!stack_depot_disable && !stack_table) {
pr_info("Stack Depot allocating hash table with kvcalloc\n");
stack_table = kvcalloc(STACK_HASH_SIZE, sizeof(struct stack_record *), GFP_KERNEL);
unsigned long entries;
int scale = STACK_HASH_SCALE;
if (stack_hash_order) {
entries = 1UL << stack_hash_order;
} else {
entries = nr_free_buffer_pages();
entries = roundup_pow_of_two(entries);
if (scale > PAGE_SHIFT)
entries >>= (scale - PAGE_SHIFT);
else
entries <<= (PAGE_SHIFT - scale);
}
if (entries < 1UL << STACK_HASH_ORDER_MIN)
entries = 1UL << STACK_HASH_ORDER_MIN;
if (entries > 1UL << STACK_HASH_ORDER_MAX)
entries = 1UL << STACK_HASH_ORDER_MAX;
pr_info("Stack Depot allocating hash table of %lu entries with kvcalloc\n",
entries);
stack_table = kvcalloc(entries, sizeof(struct stack_record *), GFP_KERNEL);
if (!stack_table) {
pr_err("Stack Depot hash table allocation failed, disabling\n");
stack_depot_disable = true;
ret = -ENOMEM;
}
stack_hash_mask = entries - 1;
}
mutex_unlock(&stack_depot_init_mutex);
return ret;
@ -386,7 +425,7 @@ depot_stack_handle_t __stack_depot_save(unsigned long *entries,
goto fast_exit;
hash = hash_stack(entries, nr_entries);
bucket = &stack_table[hash & STACK_HASH_MASK];
bucket = &stack_table[hash & stack_hash_mask];
/*
* Fast path: look the stack trace up without locking.

138
lib/test_cpumask.c Normal file
View file

@ -0,0 +1,138 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* KUnit tests for cpumask.
*
* Author: Sander Vanheule <sander@svanheule.net>
*/
#include <kunit/test.h>
#include <linux/cpu.h>
#include <linux/cpumask.h>
#define EXPECT_FOR_EACH_CPU_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu(cpu, m) \
iter++; \
KUNIT_EXPECT_EQ((test), mask_weight, iter); \
} while (0)
#define EXPECT_FOR_EACH_CPU_NOT_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu_not(cpu, m) \
iter++; \
KUNIT_EXPECT_EQ((test), nr_cpu_ids - mask_weight, iter); \
} while (0)
#define EXPECT_FOR_EACH_CPU_WRAP_EQ(test, mask) \
do { \
const cpumask_t *m = (mask); \
int mask_weight = cpumask_weight(m); \
int cpu, iter = 0; \
for_each_cpu_wrap(cpu, m, nr_cpu_ids / 2) \
iter++; \
KUNIT_EXPECT_EQ((test), mask_weight, iter); \
} while (0)
#define EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, name) \
do { \
int mask_weight = num_##name##_cpus(); \
int cpu, iter = 0; \
for_each_##name##_cpu(cpu) \
iter++; \
KUNIT_EXPECT_EQ((test), mask_weight, iter); \
} while (0)
static cpumask_t mask_empty;
static cpumask_t mask_all;
static void test_cpumask_weight(struct kunit *test)
{
KUNIT_EXPECT_TRUE(test, cpumask_empty(&mask_empty));
KUNIT_EXPECT_TRUE(test, cpumask_full(cpu_possible_mask));
KUNIT_EXPECT_TRUE(test, cpumask_full(&mask_all));
KUNIT_EXPECT_EQ(test, 0, cpumask_weight(&mask_empty));
KUNIT_EXPECT_EQ(test, nr_cpu_ids, cpumask_weight(cpu_possible_mask));
KUNIT_EXPECT_EQ(test, nr_cpumask_bits, cpumask_weight(&mask_all));
}
static void test_cpumask_first(struct kunit *test)
{
KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first(&mask_empty));
KUNIT_EXPECT_EQ(test, 0, cpumask_first(cpu_possible_mask));
KUNIT_EXPECT_EQ(test, 0, cpumask_first_zero(&mask_empty));
KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_first_zero(cpu_possible_mask));
}
static void test_cpumask_last(struct kunit *test)
{
KUNIT_EXPECT_LE(test, nr_cpumask_bits, cpumask_last(&mask_empty));
KUNIT_EXPECT_EQ(test, nr_cpumask_bits - 1, cpumask_last(cpu_possible_mask));
}
static void test_cpumask_next(struct kunit *test)
{
KUNIT_EXPECT_EQ(test, 0, cpumask_next_zero(-1, &mask_empty));
KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next_zero(-1, cpu_possible_mask));
KUNIT_EXPECT_LE(test, nr_cpu_ids, cpumask_next(-1, &mask_empty));
KUNIT_EXPECT_EQ(test, 0, cpumask_next(-1, cpu_possible_mask));
}
static void test_cpumask_iterators(struct kunit *test)
{
EXPECT_FOR_EACH_CPU_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_NOT_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_WRAP_EQ(test, &mask_empty);
EXPECT_FOR_EACH_CPU_EQ(test, cpu_possible_mask);
EXPECT_FOR_EACH_CPU_NOT_EQ(test, cpu_possible_mask);
EXPECT_FOR_EACH_CPU_WRAP_EQ(test, cpu_possible_mask);
}
static void test_cpumask_iterators_builtin(struct kunit *test)
{
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, possible);
/* Ensure the dynamic masks are stable while running the tests */
cpu_hotplug_disable();
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, online);
EXPECT_FOR_EACH_CPU_BUILTIN_EQ(test, present);
cpu_hotplug_enable();
}
static int test_cpumask_init(struct kunit *test)
{
cpumask_clear(&mask_empty);
cpumask_setall(&mask_all);
return 0;
}
static struct kunit_case test_cpumask_cases[] = {
KUNIT_CASE(test_cpumask_weight),
KUNIT_CASE(test_cpumask_first),
KUNIT_CASE(test_cpumask_last),
KUNIT_CASE(test_cpumask_next),
KUNIT_CASE(test_cpumask_iterators),
KUNIT_CASE(test_cpumask_iterators_builtin),
{}
};
static struct kunit_suite test_cpumask_suite = {
.name = "cpumask",
.init = test_cpumask_init,
.test_cases = test_cpumask_cases,
};
kunit_test_suite(test_cpumask_suite);
MODULE_LICENSE("GPL");

2
lib/ts_bm.c
View file

@ -80,7 +80,7 @@ static unsigned int bm_find(struct ts_config *conf, struct ts_state *state)
/* London calling... */
DEBUGP("found!\n");
return consumed += (shift-(bm->patlen-1));
return consumed + (shift-(bm->patlen-1));
next: bs = bm->bad_shift[text[shift-i]];

47
scripts/bloat-o-meter
View file

@ -7,24 +7,31 @@
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
import sys, os, re
import sys, os, re, argparse
from signal import signal, SIGPIPE, SIG_DFL
signal(SIGPIPE, SIG_DFL)
if len(sys.argv) < 3:
sys.stderr.write("usage: %s [option] file1 file2\n" % sys.argv[0])
sys.stderr.write("The options are:\n")
sys.stderr.write("-c categorize output based on symbol type\n")
sys.stderr.write("-d Show delta of Data Section\n")
sys.stderr.write("-t Show delta of text Section\n")
sys.exit(-1)
parser = argparse.ArgumentParser(description="Simple script used to compare the symbol sizes of 2 object files")
group = parser.add_mutually_exclusive_group()
group.add_argument('-c', help='categorize output based on symbol type', action='store_true')
group.add_argument('-d', help='Show delta of Data Section', action='store_true')
group.add_argument('-t', help='Show delta of text Section', action='store_true')
parser.add_argument('-p', dest='prefix', help='Arch prefix for the tool being used. Useful in cross build scenarios')
parser.add_argument('file1', help='First file to compare')
parser.add_argument('file2', help='Second file to compare')
args = parser.parse_args()
re_NUMBER = re.compile(r'\.[0-9]+')
def getsizes(file, format):
sym = {}
with os.popen("nm --size-sort " + file) as f:
nm = "nm"
if args.prefix:
nm = "{}nm".format(args.prefix)
with os.popen("{} --size-sort {}".format(nm, file)) as f:
for line in f:
if line.startswith("\n") or ":" in line:
continue
@ -77,9 +84,9 @@ def calc(oldfile, newfile, format):
delta.reverse()
return grow, shrink, add, remove, up, down, delta, old, new, otot, ntot
def print_result(symboltype, symbolformat, argc):
def print_result(symboltype, symbolformat):
grow, shrink, add, remove, up, down, delta, old, new, otot, ntot = \
calc(sys.argv[argc - 1], sys.argv[argc], symbolformat)
calc(args.file1, args.file2, symbolformat)
print("add/remove: %s/%s grow/shrink: %s/%s up/down: %s/%s (%s)" % \
(add, remove, grow, shrink, up, -down, up-down))
@ -93,13 +100,13 @@ def print_result(symboltype, symbolformat, argc):
percent = 0
print("Total: Before=%d, After=%d, chg %+.2f%%" % (otot, ntot, percent))
if sys.argv[1] == "-c":
print_result("Function", "tT", 3)
print_result("Data", "dDbB", 3)
print_result("RO Data", "rR", 3)
elif sys.argv[1] == "-d":
print_result("Data", "dDbBrR", 3)
elif sys.argv[1] == "-t":
print_result("Function", "tT", 3)
if args.c:
print_result("Function", "tT")
print_result("Data", "dDbB")
print_result("RO Data", "rR")
elif args.d:
print_result("Data", "dDbBrR")
elif args.t:
print_result("Function", "tT")
else:
print_result("Function", "tTdDbBrR", 2)
print_result("Function", "tTdDbBrR")

5
scripts/checkpatch.pl
View file

@ -1042,7 +1042,8 @@ our $FuncArg = qr{$Typecast{0,1}($LvalOrFunc|$Constant|$String)};
our $declaration_macros = qr{(?x:
(?:$Storage\s+)?(?:[A-Z_][A-Z0-9]*_){0,2}(?:DEFINE|DECLARE)(?:_[A-Z0-9]+){1,6}\s*\(|
(?:$Storage\s+)?[HLP]?LIST_HEAD\s*\(|
(?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\(
(?:SKCIPHER_REQUEST|SHASH_DESC|AHASH_REQUEST)_ON_STACK\s*\(|
(?:$Storage\s+)?(?:XA_STATE|XA_STATE_ORDER)\s*\(
)};
our %allow_repeated_words = (
@ -5720,7 +5721,7 @@ sub process {
$var !~ /^(?:[a-z0-9_]*|[A-Z0-9_]*)?_?[a-z][A-Z](?:_[a-z0-9_]+|_[A-Z0-9_]+)?$/ &&
#Ignore some three character SI units explicitly, like MiB and KHz
$var !~ /^(?:[a-z_]*?)_?(?:[KMGT]iB|[KMGT]?Hz)(?:_[a-z_]+)?$/) {
while ($var =~ m{($Ident)}g) {
while ($var =~ m{\b($Ident)}g) {
my $word = $1;
next if ($word !~ /[A-Z][a-z]|[a-z][A-Z]/);
if ($check) {

2
scripts/gdb/vmlinux-gdb.py
View file

@ -13,7 +13,7 @@
import os
sys.path.insert(0, os.path.dirname(__file__) + "/scripts/gdb")
sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)) + "/scripts/gdb")
try:
gdb.parse_and_eval("0")

4
tools/accounting/getdelays.c
View file

@ -45,7 +45,6 @@
exit(code); \
} while (0)
int done;
int rcvbufsz;
char name[100];
int dbg;
@ -285,7 +284,6 @@ int main(int argc, char *argv[])
pid_t rtid = 0;
int fd = 0;
int count = 0;
int write_file = 0;
int maskset = 0;
char *logfile = NULL;
@ -495,7 +493,6 @@ int main(int argc, char *argv[])
len2 = 0;
/* For nested attributes, na follows */
na = (struct nlattr *) NLA_DATA(na);
done = 0;
while (len2 < aggr_len) {
switch (na->nla_type) {
case TASKSTATS_TYPE_PID:
@ -509,7 +506,6 @@ int main(int argc, char *argv[])
printf("TGID\t%d\n", rtid);
break;
case TASKSTATS_TYPE_STATS:
count++;
if (print_delays)
print_delayacct((struct taskstats *) NLA_DATA(na));
if (print_io_accounting)

1
tools/testing/selftests/Makefile
View file

@ -17,6 +17,7 @@ TARGETS += exec
TARGETS += filesystems
TARGETS += filesystems/binderfs
TARGETS += filesystems/epoll
TARGETS += filesystems/fat
TARGETS += firmware
TARGETS += fpu
TARGETS += ftrace

2
tools/testing/selftests/filesystems/fat/.gitignore vendored Normal file
View file

@ -0,0 +1,2 @@
# SPDX-License-Identifier: GPL-2.0-only
rename_exchange

7
tools/testing/selftests/filesystems/fat/Makefile Normal file
View file

@ -0,0 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
TEST_PROGS := run_fat_tests.sh
TEST_GEN_PROGS_EXTENDED := rename_exchange
CFLAGS += -O2 -g -Wall $(KHDR_INCLUDES)
include ../../lib.mk

2
tools/testing/selftests/filesystems/fat/config Normal file
View file

@ -0,0 +1,2 @@
CONFIG_BLK_DEV_LOOP=y
CONFIG_VFAT_FS=y

37
tools/testing/selftests/filesystems/fat/rename_exchange.c Normal file
View file

@ -0,0 +1,37 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Program that atomically exchanges two paths using
* the renameat2() system call RENAME_EXCHANGE flag.
*
* Copyright 2022 Red Hat Inc.
* Author: Javier Martinez Canillas <javierm@redhat.com>
*/
#define _GNU_SOURCE
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
void print_usage(const char *program)
{
printf("Usage: %s [oldpath] [newpath]\n", program);
printf("Atomically exchange oldpath and newpath\n");
}
int main(int argc, char *argv[])
{
int ret;
if (argc != 3) {
print_usage(argv[0]);
exit(EXIT_FAILURE);
}
ret = renameat2(AT_FDCWD, argv[1], AT_FDCWD, argv[2], RENAME_EXCHANGE);
if (ret) {
perror("rename exchange failed");
exit(EXIT_FAILURE);
}
exit(EXIT_SUCCESS);
}

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