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Merge branch 'akpm' (patches from Andrew)

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Merge more updates from Andrew Morton:
 "87 patches.

  Subsystems affected by this patch series: mm (pagecache and hugetlb),
  procfs, misc, MAINTAINERS, lib, checkpatch, binfmt, kallsyms, ramfs,
  init, codafs, nilfs2, hfs, crash_dump, signals, seq_file, fork,
  sysvfs, kcov, gdb, resource, selftests, and ipc"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (87 commits)
  ipc/ipc_sysctl.c: remove fallback for !CONFIG_PROC_SYSCTL
  ipc: check checkpoint_restore_ns_capable() to modify C/R proc files
  selftests/kselftest/runner/run_one(): allow running non-executable files
  virtio-mem: disallow mapping virtio-mem memory via /dev/mem
  kernel/resource: disallow access to exclusive system RAM regions
  kernel/resource: clean up and optimize iomem_is_exclusive()
  scripts/gdb: handle split debug for vmlinux
  kcov: replace local_irq_save() with a local_lock_t
  kcov: avoid enable+disable interrupts if !in_task()
  kcov: allocate per-CPU memory on the relevant node
  Documentation/kcov: define `ip' in the example
  Documentation/kcov: include types.h in the example
  sysv: use BUILD_BUG_ON instead of runtime check
  kernel/fork.c: unshare(): use swap() to make code cleaner
  seq_file: fix passing wrong private data
  seq_file: move seq_escape() to a header
  signal: remove duplicate include in signal.h
  crash_dump: remove duplicate include in crash_dump.h
  crash_dump: fix boolreturn.cocci warning
  hfs/hfsplus: use WARN_ON for sanity check
  ...
This commit is contained in:
Linus Torvalds 2021-11-09 10:11:53 -08:00
commit 59a2ceeef6
131 changed files with 1178 additions and 654 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
.mailmap
View File

@ -73,6 +73,8 @@ Chris Chiu <chris.chiu@canonical.com> <chiu@endlessm.com>
Chris Chiu <chris.chiu@canonical.com> <chiu@endlessos.org>
Christophe Ricard <christophe.ricard@gmail.com>
Christoph Hellwig <hch@lst.de>
Colin Ian King <colin.king@intel.com> <colin.king@canonical.com>
Colin Ian King <colin.king@intel.com> <colin.i.king@gmail.com>
Corey Minyard <minyard@acm.org>
Damian Hobson-Garcia <dhobsong@igel.co.jp>
Daniel Borkmann <daniel@iogearbox.net> <danborkmann@googlemail.com>

5
Documentation/dev-tools/kcov.rst
View File

@ -50,6 +50,7 @@ program using kcov:
#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <linux/types.h>
#define KCOV_INIT_TRACE _IOR('c', 1, unsigned long)
#define KCOV_ENABLE _IO('c', 100)
@ -177,6 +178,8 @@ Comparison operands collection is similar to coverage collection:
/* Read number of comparisons collected. */
n = __atomic_load_n(&cover[0], __ATOMIC_RELAXED);
for (i = 0; i < n; i++) {
uint64_t ip;
type = cover[i * KCOV_WORDS_PER_CMP + 1];
/* arg1 and arg2 - operands of the comparison. */
arg1 = cover[i * KCOV_WORDS_PER_CMP + 2];
@ -251,6 +254,8 @@ selectively from different subsystems.
.. code-block:: c
/* Same includes and defines as above. */
struct kcov_remote_arg {
__u32 trace_mode;
__u32 area_size;

21
MAINTAINERS
View File

@ -767,7 +767,7 @@ F: drivers/crypto/allwinner/
ALLWINNER HARDWARE SPINLOCK SUPPORT
M: Wilken Gottwalt <wilken.gottwalt@posteo.net>
S: Maintained
F: Documentation/devicetree/bindings/hwlock/allwinner,sun6i-hwspinlock.yaml
F: Documentation/devicetree/bindings/hwlock/allwinner,sun6i-a31-hwspinlock.yaml
F: drivers/hwspinlock/sun6i_hwspinlock.c
ALLWINNER THERMAL DRIVER
@ -2783,7 +2783,7 @@ F: Documentation/devicetree/bindings/arm/toshiba.yaml
F: Documentation/devicetree/bindings/net/toshiba,visconti-dwmac.yaml
F: Documentation/devicetree/bindings/gpio/toshiba,gpio-visconti.yaml
F: Documentation/devicetree/bindings/pci/toshiba,visconti-pcie.yaml
F: Documentation/devicetree/bindings/pinctrl/toshiba,tmpv7700-pinctrl.yaml
F: Documentation/devicetree/bindings/pinctrl/toshiba,visconti-pinctrl.yaml
F: Documentation/devicetree/bindings/watchdog/toshiba,visconti-wdt.yaml
F: arch/arm64/boot/dts/toshiba/
F: drivers/net/ethernet/stmicro/stmmac/dwmac-visconti.c
@ -7119,6 +7119,20 @@ F: include/uapi/linux/mdio.h
F: include/uapi/linux/mii.h
F: net/core/of_net.c
EXEC & BINFMT API
R: Eric Biederman <ebiederm@xmission.com>
R: Kees Cook <keescook@chromium.org>
F: arch/alpha/kernel/binfmt_loader.c
F: arch/x86/ia32/ia32_aout.c
F: fs/*binfmt_*.c
F: fs/exec.c
F: include/linux/binfmts.h
F: include/linux/elf.h
F: include/uapi/linux/binfmts.h
F: tools/testing/selftests/exec/
N: asm/elf.h
N: binfmt
EXFAT FILE SYSTEM
M: Namjae Jeon <linkinjeon@kernel.org>
M: Sungjong Seo <sj1557.seo@samsung.com>
@ -8562,7 +8576,6 @@ M: John Stultz <john.stultz@linaro.org>
L: linux-kernel@vger.kernel.org
S: Maintained
F: drivers/misc/hisi_hikey_usb.c
F: Documentation/devicetree/bindings/misc/hisilicon-hikey-usb.yaml
HISILICON PMU DRIVER
M: Shaokun Zhang <zhangshaokun@hisilicon.com>
@ -9621,7 +9634,7 @@ INTEL KEEM BAY DRM DRIVER
M: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
M: Edmund Dea <edmund.j.dea@intel.com>
S: Maintained
F: Documentation/devicetree/bindings/display/intel,kmb_display.yaml
F: Documentation/devicetree/bindings/display/intel,keembay-display.yaml
F: drivers/gpu/drm/kmb/
INTEL KEEM BAY OCS AES/SM4 CRYPTO DRIVER

4
arch/alpha/kernel/traps.c
View File

@ -129,9 +129,7 @@ dik_show_trace(unsigned long *sp, const char *loglvl)
extern char _stext[], _etext[];
unsigned long tmp = *sp;
sp++;
if (tmp < (unsigned long) &_stext)
continue;
if (tmp >= (unsigned long) &_etext)
if (!is_kernel_text(tmp))
continue;
printk("%s[<%lx>] %pSR\n", loglvl, tmp, (void *)tmp);
if (i > 40) {

3
arch/microblaze/mm/pgtable.c
View File

@ -34,6 +34,7 @@
#include <linux/mm_types.h>
#include <linux/pgtable.h>
#include <linux/memblock.h>
#include <linux/kallsyms.h>
#include <asm/pgalloc.h>
#include <linux/io.h>
@ -171,7 +172,7 @@ void __init mapin_ram(void)
for (s = 0; s < lowmem_size; s += PAGE_SIZE) {
f = _PAGE_PRESENT | _PAGE_ACCESSED |
_PAGE_SHARED | _PAGE_HWEXEC;
if ((char *) v < _stext || (char *) v >= _etext)
if (!is_kernel_text(v))
f |= _PAGE_WRENABLE;
else
/* On the MicroBlaze, no user access

7
arch/powerpc/mm/pgtable_32.c
View File

@ -33,8 +33,6 @@
#include <mm/mmu_decl.h>
extern char etext[], _stext[], _sinittext[], _einittext[];
static u8 early_fixmap_pagetable[FIXMAP_PTE_SIZE] __page_aligned_data;
notrace void __init early_ioremap_init(void)
@ -104,14 +102,13 @@ static void __init __mapin_ram_chunk(unsigned long offset, unsigned long top)
{
unsigned long v, s;
phys_addr_t p;
int ktext;
bool ktext;
s = offset;
v = PAGE_OFFSET + s;
p = memstart_addr + s;
for (; s < top; s += PAGE_SIZE) {
ktext = ((char *)v >= _stext && (char *)v < etext) ||
((char *)v >= _sinittext && (char *)v < _einittext);
ktext = core_kernel_text(v);
map_kernel_page(v, p, ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL);
v += PAGE_SIZE;
p += PAGE_SIZE;

4
arch/riscv/lib/delay.c
View File

@ -4,10 +4,14 @@
*/
#include <linux/delay.h>
#include <linux/math.h>
#include <linux/param.h>
#include <linux/timex.h>
#include <linux/types.h>
#include <linux/export.h>
#include <asm/processor.h>
/*
* This is copies from arch/arm/include/asm/delay.h
*

4
arch/s390/include/asm/facility.h
View File

@ -9,8 +9,12 @@
#define __ASM_FACILITY_H
#include <asm/facility-defs.h>
#include <linux/minmax.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/preempt.h>
#include <asm/lowcore.h>
#define MAX_FACILITY_BIT (sizeof(stfle_fac_list) * 8)

13
arch/x86/kernel/aperture_64.c
View File

@ -73,12 +73,23 @@ static int gart_mem_pfn_is_ram(unsigned long pfn)
(pfn >= aperture_pfn_start + aperture_page_count));
}
#ifdef CONFIG_PROC_VMCORE
static bool gart_oldmem_pfn_is_ram(struct vmcore_cb *cb, unsigned long pfn)
{
return !!gart_mem_pfn_is_ram(pfn);
}
static struct vmcore_cb gart_vmcore_cb = {
.pfn_is_ram = gart_oldmem_pfn_is_ram,
};
#endif
static void __init exclude_from_core(u64 aper_base, u32 aper_order)
{
aperture_pfn_start = aper_base >> PAGE_SHIFT;
aperture_page_count = (32 * 1024 * 1024) << aper_order >> PAGE_SHIFT;
#ifdef CONFIG_PROC_VMCORE
WARN_ON(register_oldmem_pfn_is_ram(&gart_mem_pfn_is_ram));
register_vmcore_cb(&gart_vmcore_cb);
#endif
#ifdef CONFIG_PROC_KCORE
WARN_ON(register_mem_pfn_is_ram(&gart_mem_pfn_is_ram));

2
arch/x86/kernel/unwind_orc.c
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@ -175,7 +175,7 @@ static struct orc_entry *orc_find(unsigned long ip)
}
/* vmlinux .init slow lookup: */
if (init_kernel_text(ip))
if (is_kernel_inittext(ip))
return __orc_find(__start_orc_unwind_ip, __start_orc_unwind,
__stop_orc_unwind_ip - __start_orc_unwind_ip, ip);

14
arch/x86/mm/init_32.c
View File

@ -238,11 +238,7 @@ page_table_range_init(unsigned long start, unsigned long end, pgd_t *pgd_base)
}
}
/*
* The <linux/kallsyms.h> already defines is_kernel_text,
* using '__' prefix not to get in conflict.
*/
static inline int __is_kernel_text(unsigned long addr)
static inline int is_x86_32_kernel_text(unsigned long addr)
{
if (addr >= (unsigned long)_text && addr <= (unsigned long)__init_end)
return 1;
@ -333,8 +329,8 @@ repeat:
addr2 = (pfn + PTRS_PER_PTE-1) * PAGE_SIZE +
PAGE_OFFSET + PAGE_SIZE-1;
if (__is_kernel_text(addr) ||
__is_kernel_text(addr2))
if (is_x86_32_kernel_text(addr) ||
is_x86_32_kernel_text(addr2))
prot = PAGE_KERNEL_LARGE_EXEC;
pages_2m++;
@ -359,7 +355,7 @@ repeat:
*/
pgprot_t init_prot = __pgprot(PTE_IDENT_ATTR);
if (__is_kernel_text(addr))
if (is_x86_32_kernel_text(addr))
prot = PAGE_KERNEL_EXEC;
pages_4k++;
@ -789,7 +785,7 @@ static void mark_nxdata_nx(void)
*/
unsigned long start = PFN_ALIGN(_etext);
/*
* This comes from __is_kernel_text upper limit. Also HPAGE where used:
* This comes from is_x86_32_kernel_text upper limit. Also HPAGE where used:
*/
unsigned long size = (((unsigned long)__init_end + HPAGE_SIZE) & HPAGE_MASK) - start;

37
arch/x86/xen/mmu_hvm.c
View File

@ -9,39 +9,28 @@
#ifdef CONFIG_PROC_VMCORE
/*
* This function is used in two contexts:
* - the kdump kernel has to check whether a pfn of the crashed kernel
* was a ballooned page. vmcore is using this function to decide
* whether to access a pfn of the crashed kernel.
* - the kexec kernel has to check whether a pfn was ballooned by the
* previous kernel. If the pfn is ballooned, handle it properly.
* Returns 0 if the pfn is not backed by a RAM page, the caller may
* The kdump kernel has to check whether a pfn of the crashed kernel
* was a ballooned page. vmcore is using this function to decide
* whether to access a pfn of the crashed kernel.
* Returns "false" if the pfn is not backed by a RAM page, the caller may
* handle the pfn special in this case.
*/
static int xen_oldmem_pfn_is_ram(unsigned long pfn)
static bool xen_vmcore_pfn_is_ram(struct vmcore_cb *cb, unsigned long pfn)
{
struct xen_hvm_get_mem_type a = {
.domid = DOMID_SELF,
.pfn = pfn,
};
int ram;
if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a))
return -ENXIO;
switch (a.mem_type) {
case HVMMEM_mmio_dm:
ram = 0;
break;
case HVMMEM_ram_rw:
case HVMMEM_ram_ro:
default:
ram = 1;
break;
if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) {
pr_warn_once("Unexpected HVMOP_get_mem_type failure\n");
return true;
}
return ram;
return a.mem_type != HVMMEM_mmio_dm;
}
static struct vmcore_cb xen_vmcore_cb = {
.pfn_is_ram = xen_vmcore_pfn_is_ram,
};
#endif
static void xen_hvm_exit_mmap(struct mm_struct *mm)
@ -75,6 +64,6 @@ void __init xen_hvm_init_mmu_ops(void)
if (is_pagetable_dying_supported())
pv_ops.mmu.exit_mmap = xen_hvm_exit_mmap;
#ifdef CONFIG_PROC_VMCORE
WARN_ON(register_oldmem_pfn_is_ram(&xen_oldmem_pfn_is_ram));
register_vmcore_cb(&xen_vmcore_cb);
#endif
}

5
drivers/gpu/drm/drm_dp_mst_topology.c
View File

@ -1668,13 +1668,10 @@ __dump_topology_ref_history(struct drm_dp_mst_topology_ref_history *history,
for (i = 0; i < history->len; i++) {
const struct drm_dp_mst_topology_ref_entry *entry =
&history->entries[i];
ulong *entries;
uint nr_entries;
u64 ts_nsec = entry->ts_nsec;
u32 rem_nsec = do_div(ts_nsec, 1000000000);
nr_entries = stack_depot_fetch(entry->backtrace, &entries);
stack_trace_snprint(buf, PAGE_SIZE, entries, nr_entries, 4);
stack_depot_snprint(entry->backtrace, buf, PAGE_SIZE, 4);
drm_printf(&p, " %d %ss (last at %5llu.%06u):\n%s",
entry->count,

5
drivers/gpu/drm/drm_mm.c
View File

@ -118,8 +118,6 @@ static noinline void save_stack(struct drm_mm_node *node)
static void show_leaks(struct drm_mm *mm)
{
struct drm_mm_node *node;
unsigned long *entries;
unsigned int nr_entries;
char *buf;
buf = kmalloc(BUFSZ, GFP_KERNEL);
@ -133,8 +131,7 @@ static void show_leaks(struct drm_mm *mm)
continue;
}
nr_entries = stack_depot_fetch(node->stack, &entries);
stack_trace_snprint(buf, BUFSZ, entries, nr_entries, 0);
stack_depot_snprint(node->stack, buf, BUFSZ, 0);
DRM_ERROR("node [%08llx + %08llx]: inserted at\n%s",
node->start, node->size, buf);
}

5
drivers/gpu/drm/i915/i915_vma.c
View File

@ -56,8 +56,6 @@ void i915_vma_free(struct i915_vma *vma)
static void vma_print_allocator(struct i915_vma *vma, const char *reason)
{
unsigned long *entries;
unsigned int nr_entries;
char buf[512];
if (!vma->node.stack) {
@ -66,8 +64,7 @@ static void vma_print_allocator(struct i915_vma *vma, const char *reason)
return;
}
nr_entries = stack_depot_fetch(vma->node.stack, &entries);
stack_trace_snprint(buf, sizeof(buf), entries, nr_entries, 0);
stack_depot_snprint(vma->node.stack, buf, sizeof(buf), 0);
DRM_DEBUG_DRIVER("vma.node [%08llx + %08llx] %s: inserted at %s\n",
vma->node.start, vma->node.size, reason, buf);
}

20
drivers/gpu/drm/i915/intel_runtime_pm.c
View File

@ -65,16 +65,6 @@ static noinline depot_stack_handle_t __save_depot_stack(void)
return stack_depot_save(entries, n, GFP_NOWAIT | __GFP_NOWARN);
}
static void __print_depot_stack(depot_stack_handle_t stack,
char *buf, int sz, int indent)
{
unsigned long *entries;
unsigned int nr_entries;
nr_entries = stack_depot_fetch(stack, &entries);
stack_trace_snprint(buf, sz, entries, nr_entries, indent);
}
static void init_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm)
{
spin_lock_init(&rpm->debug.lock);
@ -146,12 +136,12 @@ static void untrack_intel_runtime_pm_wakeref(struct intel_runtime_pm *rpm,
if (!buf)
return;
__print_depot_stack(stack, buf, PAGE_SIZE, 2);
stack_depot_snprint(stack, buf, PAGE_SIZE, 2);
DRM_DEBUG_DRIVER("wakeref %x from\n%s", stack, buf);
stack = READ_ONCE(rpm->debug.last_release);
if (stack) {
__print_depot_stack(stack, buf, PAGE_SIZE, 2);
stack_depot_snprint(stack, buf, PAGE_SIZE, 2);
DRM_DEBUG_DRIVER("wakeref last released at\n%s", buf);
}
@ -183,12 +173,12 @@ __print_intel_runtime_pm_wakeref(struct drm_printer *p,
return;
if (dbg->last_acquire) {
__print_depot_stack(dbg->last_acquire, buf, PAGE_SIZE, 2);
stack_depot_snprint(dbg->last_acquire, buf, PAGE_SIZE, 2);
drm_printf(p, "Wakeref last acquired:\n%s", buf);
}
if (dbg->last_release) {
__print_depot_stack(dbg->last_release, buf, PAGE_SIZE, 2);
stack_depot_snprint(dbg->last_release, buf, PAGE_SIZE, 2);
drm_printf(p, "Wakeref last released:\n%s", buf);
}
@ -203,7 +193,7 @@ __print_intel_runtime_pm_wakeref(struct drm_printer *p,
rep = 1;
while (i + 1 < dbg->count && dbg->owners[i + 1] == stack)
rep++, i++;
__print_depot_stack(stack, buf, PAGE_SIZE, 2);
stack_depot_snprint(stack, buf, PAGE_SIZE, 2);
drm_printf(p, "Wakeref x%lu taken at:\n%s", rep, buf);
}

1
drivers/media/dvb-frontends/cxd2880/cxd2880_common.h
View File

@ -12,6 +12,7 @@
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/bits.h>
#include <linux/string.h>
int cxd2880_convert2s_complement(u32 value, u32 bitlen);

1
drivers/virtio/Kconfig
View File

@ -111,6 +111,7 @@ config VIRTIO_MEM
depends on MEMORY_HOTPLUG
depends on MEMORY_HOTREMOVE
depends on CONTIG_ALLOC
depends on EXCLUSIVE_SYSTEM_RAM
help
This driver provides access to virtio-mem paravirtualized memory
devices, allowing to hotplug and hotunplug memory.

301
drivers/virtio/virtio_mem.c
View File

@ -223,6 +223,9 @@ struct virtio_mem {
* When this lock is held the pointers can't change, ONLINE and
* OFFLINE blocks can't change the state and no subblocks will get
* plugged/unplugged.
*
* In kdump mode, used to serialize requests, last_block_addr and
* last_block_plugged.
*/
struct mutex hotplug_mutex;
bool hotplug_active;
@ -230,6 +233,9 @@ struct virtio_mem {
/* An error occurred we cannot handle - stop processing requests. */
bool broken;
/* Cached valued of is_kdump_kernel() when the device was probed. */
bool in_kdump;
/* The driver is being removed. */
spinlock_t removal_lock;
bool removing;
@ -243,6 +249,13 @@ struct virtio_mem {
/* Memory notifier (online/offline events). */
struct notifier_block memory_notifier;
#ifdef CONFIG_PROC_VMCORE
/* vmcore callback for /proc/vmcore handling in kdump mode */
struct vmcore_cb vmcore_cb;
uint64_t last_block_addr;
bool last_block_plugged;
#endif /* CONFIG_PROC_VMCORE */
/* Next device in the list of virtio-mem devices. */
struct list_head next;
};
@ -260,6 +273,8 @@ static void virtio_mem_fake_offline_going_offline(unsigned long pfn,
static void virtio_mem_fake_offline_cancel_offline(unsigned long pfn,
unsigned long nr_pages);
static void virtio_mem_retry(struct virtio_mem *vm);
static int virtio_mem_create_resource(struct virtio_mem *vm);
static void virtio_mem_delete_resource(struct virtio_mem *vm);
/*
* Register a virtio-mem device so it will be considered for the online_page
@ -2291,6 +2306,12 @@ static void virtio_mem_run_wq(struct work_struct *work)
uint64_t diff;
int rc;
if (unlikely(vm->in_kdump)) {
dev_warn_once(&vm->vdev->dev,
"unexpected workqueue run in kdump kernel\n");
return;
}
hrtimer_cancel(&vm->retry_timer);
if (vm->broken)
@ -2392,41 +2413,11 @@ static int virtio_mem_init_vq(struct virtio_mem *vm)
return 0;
}
static int virtio_mem_init(struct virtio_mem *vm)
static int virtio_mem_init_hotplug(struct virtio_mem *vm)
{
const struct range pluggable_range = mhp_get_pluggable_range(true);
uint64_t sb_size, addr;
uint16_t node_id;
if (!vm->vdev->config->get) {
dev_err(&vm->vdev->dev, "config access disabled\n");
return -EINVAL;
}
/*
* We don't want to (un)plug or reuse any memory when in kdump. The
* memory is still accessible (but not mapped).
*/
if (is_kdump_kernel()) {
dev_warn(&vm->vdev->dev, "disabled in kdump kernel\n");
return -EBUSY;
}
/* Fetch all properties that can't change. */
virtio_cread_le(vm->vdev, struct virtio_mem_config, plugged_size,
&vm->plugged_size);
virtio_cread_le(vm->vdev, struct virtio_mem_config, block_size,
&vm->device_block_size);
virtio_cread_le(vm->vdev, struct virtio_mem_config, node_id,
&node_id);
vm->nid = virtio_mem_translate_node_id(vm, node_id);
virtio_cread_le(vm->vdev, struct virtio_mem_config, addr, &vm->addr);
virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size,
&vm->region_size);
/* Determine the nid for the device based on the lowest address. */
if (vm->nid == NUMA_NO_NODE)
vm->nid = memory_add_physaddr_to_nid(vm->addr);
uint64_t unit_pages, sb_size, addr;
int rc;
/* bad device setup - warn only */
if (!IS_ALIGNED(vm->addr, memory_block_size_bytes()))
@ -2496,10 +2487,6 @@ static int virtio_mem_init(struct virtio_mem *vm)
vm->offline_threshold);
}
dev_info(&vm->vdev->dev, "start address: 0x%llx", vm->addr);
dev_info(&vm->vdev->dev, "region size: 0x%llx", vm->region_size);
dev_info(&vm->vdev->dev, "device block size: 0x%llx",
(unsigned long long)vm->device_block_size);
dev_info(&vm->vdev->dev, "memory block size: 0x%lx",
memory_block_size_bytes());
if (vm->in_sbm)
@ -2508,10 +2495,170 @@ static int virtio_mem_init(struct virtio_mem *vm)
else
dev_info(&vm->vdev->dev, "big block size: 0x%llx",
(unsigned long long)vm->bbm.bb_size);
/* create the parent resource for all memory */
rc = virtio_mem_create_resource(vm);
if (rc)
return rc;
/* use a single dynamic memory group to cover the whole memory device */
if (vm->in_sbm)
unit_pages = PHYS_PFN(memory_block_size_bytes());
else
unit_pages = PHYS_PFN(vm->bbm.bb_size);
rc = memory_group_register_dynamic(vm->nid, unit_pages);
if (rc < 0)
goto out_del_resource;
vm->mgid = rc;
/*
* If we still have memory plugged, we have to unplug all memory first.
* Registering our parent resource makes sure that this memory isn't
* actually in use (e.g., trying to reload the driver).
*/
if (vm->plugged_size) {
vm->unplug_all_required = true;
dev_info(&vm->vdev->dev, "unplugging all memory is required\n");
}
/* register callbacks */
vm->memory_notifier.notifier_call = virtio_mem_memory_notifier_cb;
rc = register_memory_notifier(&vm->memory_notifier);
if (rc)
goto out_unreg_group;
rc = register_virtio_mem_device(vm);
if (rc)
goto out_unreg_mem;
return 0;
out_unreg_mem:
unregister_memory_notifier(&vm->memory_notifier);
out_unreg_group:
memory_group_unregister(vm->mgid);
out_del_resource:
virtio_mem_delete_resource(vm);
return rc;
}
#ifdef CONFIG_PROC_VMCORE
static int virtio_mem_send_state_request(struct virtio_mem *vm, uint64_t addr,
uint64_t size)
{
const uint64_t nb_vm_blocks = size / vm->device_block_size;
const struct virtio_mem_req req = {
.type = cpu_to_virtio16(vm->vdev, VIRTIO_MEM_REQ_STATE),
.u.state.addr = cpu_to_virtio64(vm->vdev, addr),
.u.state.nb_blocks = cpu_to_virtio16(vm->vdev, nb_vm_blocks),
};
int rc = -ENOMEM;
dev_dbg(&vm->vdev->dev, "requesting state: 0x%llx - 0x%llx\n", addr,
addr + size - 1);
switch (virtio_mem_send_request(vm, &req)) {
case VIRTIO_MEM_RESP_ACK:
return virtio16_to_cpu(vm->vdev, vm->resp.u.state.state);
case VIRTIO_MEM_RESP_ERROR:
rc = -EINVAL;
break;
default:
break;
}
dev_dbg(&vm->vdev->dev, "requesting state failed: %d\n", rc);
return rc;
}
static bool virtio_mem_vmcore_pfn_is_ram(struct vmcore_cb *cb,
unsigned long pfn)
{
struct virtio_mem *vm = container_of(cb, struct virtio_mem,
vmcore_cb);
uint64_t addr = PFN_PHYS(pfn);
bool is_ram;
int rc;
if (!virtio_mem_contains_range(vm, addr, PAGE_SIZE))
return true;
if (!vm->plugged_size)
return false;
/*
* We have to serialize device requests and access to the information
* about the block queried last.
*/
mutex_lock(&vm->hotplug_mutex);
addr = ALIGN_DOWN(addr, vm->device_block_size);
if (addr != vm->last_block_addr) {
rc = virtio_mem_send_state_request(vm, addr,
vm->device_block_size);
/* On any kind of error, we're going to signal !ram. */
if (rc == VIRTIO_MEM_STATE_PLUGGED)
vm->last_block_plugged = true;
else
vm->last_block_plugged = false;
vm->last_block_addr = addr;
}
is_ram = vm->last_block_plugged;
mutex_unlock(&vm->hotplug_mutex);
return is_ram;
}
#endif /* CONFIG_PROC_VMCORE */
static int virtio_mem_init_kdump(struct virtio_mem *vm)
{
#ifdef CONFIG_PROC_VMCORE
dev_info(&vm->vdev->dev, "memory hot(un)plug disabled in kdump kernel\n");
vm->vmcore_cb.pfn_is_ram = virtio_mem_vmcore_pfn_is_ram;
register_vmcore_cb(&vm->vmcore_cb);
return 0;
#else /* CONFIG_PROC_VMCORE */
dev_warn(&vm->vdev->dev, "disabled in kdump kernel without vmcore\n");
return -EBUSY;
#endif /* CONFIG_PROC_VMCORE */
}
static int virtio_mem_init(struct virtio_mem *vm)
{
uint16_t node_id;
if (!vm->vdev->config->get) {
dev_err(&vm->vdev->dev, "config access disabled\n");
return -EINVAL;
}
/* Fetch all properties that can't change. */
virtio_cread_le(vm->vdev, struct virtio_mem_config, plugged_size,
&vm->plugged_size);
virtio_cread_le(vm->vdev, struct virtio_mem_config, block_size,
&vm->device_block_size);
virtio_cread_le(vm->vdev, struct virtio_mem_config, node_id,
&node_id);
vm->nid = virtio_mem_translate_node_id(vm, node_id);
virtio_cread_le(vm->vdev, struct virtio_mem_config, addr, &vm->addr);
virtio_cread_le(vm->vdev, struct virtio_mem_config, region_size,
&vm->region_size);
/* Determine the nid for the device based on the lowest address. */
if (vm->nid == NUMA_NO_NODE)
vm->nid = memory_add_physaddr_to_nid(vm->addr);
dev_info(&vm->vdev->dev, "start address: 0x%llx", vm->addr);
dev_info(&vm->vdev->dev, "region size: 0x%llx", vm->region_size);
dev_info(&vm->vdev->dev, "device block size: 0x%llx",
(unsigned long long)vm->device_block_size);
if (vm->nid != NUMA_NO_NODE && IS_ENABLED(CONFIG_NUMA))
dev_info(&vm->vdev->dev, "nid: %d", vm->nid);
return 0;
/*
* We don't want to (un)plug or reuse any memory when in kdump. The
* memory is still accessible (but not exposed to Linux).
*/
if (vm->in_kdump)
return virtio_mem_init_kdump(vm);
return virtio_mem_init_hotplug(vm);
}
static int virtio_mem_create_resource(struct virtio_mem *vm)
@ -2525,8 +2672,10 @@ static int virtio_mem_create_resource(struct virtio_mem *vm)
if (!name)
return -ENOMEM;
/* Disallow mapping device memory via /dev/mem completely. */
vm->parent_resource = __request_mem_region(vm->addr, vm->region_size,
name, IORESOURCE_SYSTEM_RAM);
name, IORESOURCE_SYSTEM_RAM |
IORESOURCE_EXCLUSIVE);
if (!vm->parent_resource) {
kfree(name);
dev_warn(&vm->vdev->dev, "could not reserve device region\n");
@ -2571,7 +2720,6 @@ static bool virtio_mem_has_memory_added(struct virtio_mem *vm)
static int virtio_mem_probe(struct virtio_device *vdev)
{
struct virtio_mem *vm;
uint64_t unit_pages;
int rc;
BUILD_BUG_ON(sizeof(struct virtio_mem_req) != 24);
@ -2590,6 +2738,7 @@ static int virtio_mem_probe(struct virtio_device *vdev)
hrtimer_init(&vm->retry_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
vm->retry_timer.function = virtio_mem_timer_expired;
vm->retry_timer_ms = VIRTIO_MEM_RETRY_TIMER_MIN_MS;
vm->in_kdump = is_kdump_kernel();
/* register the virtqueue */
rc = virtio_mem_init_vq(vm);
@ -2601,53 +2750,15 @@ static int virtio_mem_probe(struct virtio_device *vdev)
if (rc)
goto out_del_vq;
/* create the parent resource for all memory */
rc = virtio_mem_create_resource(vm);
if (rc)
goto out_del_vq;
/* use a single dynamic memory group to cover the whole memory device */
if (vm->in_sbm)
unit_pages = PHYS_PFN(memory_block_size_bytes());
else
unit_pages = PHYS_PFN(vm->bbm.bb_size);
rc = memory_group_register_dynamic(vm->nid, unit_pages);
if (rc < 0)
goto out_del_resource;
vm->mgid = rc;
/*
* If we still have memory plugged, we have to unplug all memory first.
* Registering our parent resource makes sure that this memory isn't
* actually in use (e.g., trying to reload the driver).
*/
if (vm->plugged_size) {
vm->unplug_all_required = true;
dev_info(&vm->vdev->dev, "unplugging all memory is required\n");
}
/* register callbacks */
vm->memory_notifier.notifier_call = virtio_mem_memory_notifier_cb;
rc = register_memory_notifier(&vm->memory_notifier);
if (rc)
goto out_unreg_group;
rc = register_virtio_mem_device(vm);
if (rc)
goto out_unreg_mem;
virtio_device_ready(vdev);
/* trigger a config update to start processing the requested_size */
atomic_set(&vm->config_changed, 1);
queue_work(system_freezable_wq, &vm->wq);
if (!vm->in_kdump) {
atomic_set(&vm->config_changed, 1);
queue_work(system_freezable_wq, &vm->wq);
}
return 0;
out_unreg_mem:
unregister_memory_notifier(&vm->memory_notifier);
out_unreg_group:
memory_group_unregister(vm->mgid);
out_del_resource:
virtio_mem_delete_resource(vm);
out_del_vq:
vdev->config->del_vqs(vdev);
out_free_vm:
@ -2657,9 +2768,8 @@ out_free_vm:
return rc;
}
static void virtio_mem_remove(struct virtio_device *vdev)
static void virtio_mem_deinit_hotplug(struct virtio_mem *vm)
{
struct virtio_mem *vm = vdev->priv;
unsigned long mb_id;
int rc;
@ -2706,7 +2816,8 @@ static void virtio_mem_remove(struct virtio_device *vdev)
* away. Warn at least.
*/
if (virtio_mem_has_memory_added(vm)) {
dev_warn(&vdev->dev, "device still has system memory added\n");
dev_warn(&vm->vdev->dev,
"device still has system memory added\n");
} else {
virtio_mem_delete_resource(vm);
kfree_const(vm->resource_name);
@ -2720,6 +2831,23 @@ static void virtio_mem_remove(struct virtio_device *vdev)
} else {
vfree(vm->bbm.bb_states);
}
}
static void virtio_mem_deinit_kdump(struct virtio_mem *vm)
{
#ifdef CONFIG_PROC_VMCORE
unregister_vmcore_cb(&vm->vmcore_cb);
#endif /* CONFIG_PROC_VMCORE */
}
static void virtio_mem_remove(struct virtio_device *vdev)
{
struct virtio_mem *vm = vdev->priv;
if (vm->in_kdump)
virtio_mem_deinit_kdump(vm);
else
virtio_mem_deinit_hotplug(vm);
/* reset the device and cleanup the queues */
vdev->config->reset(vdev);
@ -2733,6 +2861,9 @@ static void virtio_mem_config_changed(struct virtio_device *vdev)
{
struct virtio_mem *vm = vdev->priv;
if (unlikely(vm->in_kdump))
return;
atomic_set(&vm->config_changed, 1);
virtio_mem_retry(vm);
}

33
fs/binfmt_elf.c
View File

@ -156,7 +156,7 @@ static int padzero(unsigned long elf_bss)
#define STACK_ADD(sp, items) ((elf_addr_t __user *)(sp) - (items))
#define STACK_ROUND(sp, items) \
(((unsigned long) (sp - items)) &~ 15UL)
#define STACK_ALLOC(sp, len) ({ sp -= len ; sp; })
#define STACK_ALLOC(sp, len) (sp -= len)
#endif
#ifndef ELF_BASE_PLATFORM
@ -1074,20 +1074,26 @@ out_free_interp:
vaddr = elf_ppnt->p_vaddr;
/*
* If we are loading ET_EXEC or we have already performed
* the ET_DYN load_addr calculations, proceed normally.
* The first time through the loop, load_addr_set is false:
* layout will be calculated. Once set, use MAP_FIXED since
* we know we've already safely mapped the entire region with
* MAP_FIXED_NOREPLACE in the once-per-binary logic following.
*/
if (elf_ex->e_type == ET_EXEC || load_addr_set) {
if (load_addr_set) {
elf_flags |= MAP_FIXED;
} else if (elf_ex->e_type == ET_EXEC) {
/*
* This logic is run once for the first LOAD Program
* Header for ET_EXEC binaries. No special handling
* is needed.
*/
elf_flags |= MAP_FIXED_NOREPLACE;
} else if (elf_ex->e_type == ET_DYN) {
/*
* This logic is run once for the first LOAD Program
* Header for ET_DYN binaries to calculate the
* randomization (load_bias) for all the LOAD
* Program Headers, and to calculate the entire
* size of the ELF mapping (total_size). (Note that
* load_addr_set is set to true later once the
* initial mapping is performed.)
* Program Headers.
*
* There are effectively two types of ET_DYN
* binaries: programs (i.e. PIE: ET_DYN with INTERP)
@ -1108,7 +1114,7 @@ out_free_interp:
* Therefore, programs are loaded offset from
* ELF_ET_DYN_BASE and loaders are loaded into the
* independently randomized mmap region (0 load_bias
* without MAP_FIXED).
* without MAP_FIXED nor MAP_FIXED_NOREPLACE).
*/
if (interpreter) {
load_bias = ELF_ET_DYN_BASE;
@ -1117,7 +1123,7 @@ out_free_interp:
alignment = maximum_alignment(elf_phdata, elf_ex->e_phnum);
if (alignment)
load_bias &= ~(alignment - 1);
elf_flags |= MAP_FIXED;
elf_flags |= MAP_FIXED_NOREPLACE;
} else
load_bias = 0;
@ -1129,7 +1135,14 @@ out_free_interp:
* is then page aligned.
*/
load_bias = ELF_PAGESTART(load_bias - vaddr);
}
/*
* Calculate the entire size of the ELF mapping (total_size).
* (Note that load_addr_set is set to true later once the
* initial mapping is performed.)
*/
if (!load_addr_set) {
total_size = total_mapping_size(elf_phdata,
elf_ex->e_phnum);
if (!total_size) {

13
fs/coda/cnode.c
View File

@ -63,9 +63,10 @@ struct inode * coda_iget(struct super_block * sb, struct CodaFid * fid,
struct inode *inode;
struct coda_inode_info *cii;
unsigned long hash = coda_f2i(fid);
umode_t inode_type = coda_inode_type(attr);
retry:
inode = iget5_locked(sb, hash, coda_test_inode, coda_set_inode, fid);
if (!inode)
return ERR_PTR(-ENOMEM);
@ -75,11 +76,15 @@ struct inode * coda_iget(struct super_block * sb, struct CodaFid * fid,
inode->i_ino = hash;
/* inode is locked and unique, no need to grab cii->c_lock */
cii->c_mapcount = 0;
coda_fill_inode(inode, attr);
unlock_new_inode(inode);
} else if ((inode->i_mode & S_IFMT) != inode_type) {
/* Inode has changed type, mark bad and grab a new one */
remove_inode_hash(inode);
coda_flag_inode(inode, C_PURGE);
iput(inode);
goto retry;
}
/* always replace the attributes, type might have changed */
coda_fill_inode(inode, attr);
return inode;
}

39
fs/coda/coda_linux.c
View File

@ -87,28 +87,27 @@ static struct coda_timespec timespec64_to_coda(struct timespec64 ts64)
}
/* utility functions below */
umode_t coda_inode_type(struct coda_vattr *attr)
{
switch (attr->va_type) {
case C_VREG:
return S_IFREG;
case C_VDIR:
return S_IFDIR;
case C_VLNK:
return S_IFLNK;
case C_VNON:
default:
return 0;
}
}
void coda_vattr_to_iattr(struct inode *inode, struct coda_vattr *attr)
{
int inode_type;
/* inode's i_flags, i_ino are set by iget
XXX: is this all we need ??
*/
switch (attr->va_type) {
case C_VNON:
inode_type = 0;
break;
case C_VREG:
inode_type = S_IFREG;
break;
case C_VDIR:
inode_type = S_IFDIR;
break;
case C_VLNK:
inode_type = S_IFLNK;
break;
default:
inode_type = 0;
}
/* inode's i_flags, i_ino are set by iget
* XXX: is this all we need ??
*/
umode_t inode_type = coda_inode_type(attr);
inode->i_mode |= inode_type;
if (attr->va_mode != (u_short) -1)

6
fs/coda/coda_linux.h
View File

@ -53,10 +53,11 @@ int coda_getattr(struct user_namespace *, const struct path *, struct kstat *,
u32, unsigned int);
int coda_setattr(struct user_namespace *, struct dentry *, struct iattr *);
/* this file: heloers */
/* this file: helpers */
char *coda_f2s(struct CodaFid *f);
int coda_iscontrol(const char *name, size_t length);
umode_t coda_inode_type(struct coda_vattr *attr);
void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
unsigned short coda_flags_to_cflags(unsigned short);
@ -83,6 +84,9 @@ static __inline__ void coda_flag_inode(struct inode *inode, int flag)
{
struct coda_inode_info *cii = ITOC(inode);
if (!inode)
return;
spin_lock(&cii->c_lock);
cii->c_flags |= flag;
spin_unlock(&cii->c_lock);

20
fs/coda/dir.c
View File

@ -317,13 +317,10 @@ static int coda_rename(struct user_namespace *mnt_userns, struct inode *old_dir,
coda_dir_drop_nlink(old_dir);
coda_dir_inc_nlink(new_dir);
}
coda_dir_update_mtime(old_dir);
coda_dir_update_mtime(new_dir);
coda_flag_inode(d_inode(new_dentry), C_VATTR);
} else {
coda_flag_inode(old_dir, C_VATTR);
coda_flag_inode(new_dir, C_VATTR);
}
coda_dir_update_mtime(old_dir);
coda_dir_update_mtime(new_dir);
}
return error;
}
@ -499,15 +496,20 @@ out:
*/
static int coda_dentry_delete(const struct dentry * dentry)
{
int flags;
struct inode *inode;
struct coda_inode_info *cii;
if (d_really_is_negative(dentry))
return 0;
flags = (ITOC(d_inode(dentry))->c_flags) & C_PURGE;
if (is_bad_inode(d_inode(dentry)) || flags) {
inode = d_inode(dentry);
if (!inode || is_bad_inode(inode))
return 1;
}
cii = ITOC(inode);
if (cii->c_flags & C_PURGE)
return 1;
return 0;
}

12
fs/coda/file.c
View File

@ -8,6 +8,7 @@
* to the Coda project. Contact Peter Braam <coda@cs.cmu.edu>.
*/
#include <linux/refcount.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/time.h>
@ -28,7 +29,7 @@
#include "coda_int.h"
struct coda_vm_ops {
atomic_t refcnt;
refcount_t refcnt;
struct file *coda_file;
const struct vm_operations_struct *host_vm_ops;
struct vm_operations_struct vm_ops;
@ -98,7 +99,7 @@ coda_vm_open(struct vm_area_struct *vma)
struct coda_vm_ops *cvm_ops =
container_of(vma->vm_ops, struct coda_vm_ops, vm_ops);
atomic_inc(&cvm_ops->refcnt);
refcount_inc(&cvm_ops->refcnt);
if (cvm_ops->host_vm_ops && cvm_ops->host_vm_ops->open)
cvm_ops->host_vm_ops->open(vma);
@ -113,7 +114,7 @@ coda_vm_close(struct vm_area_struct *vma)
if (cvm_ops->host_vm_ops && cvm_ops->host_vm_ops->close)
cvm_ops->host_vm_ops->close(vma);
if (atomic_dec_and_test(&cvm_ops->refcnt)) {
if (refcount_dec_and_test(&cvm_ops->refcnt)) {
vma->vm_ops = cvm_ops->host_vm_ops;
fput(cvm_ops->coda_file);
kfree(cvm_ops);
@ -189,7 +190,7 @@ coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
cvm_ops->vm_ops.open = coda_vm_open;
cvm_ops->vm_ops.close = coda_vm_close;
cvm_ops->coda_file = coda_file;
atomic_set(&cvm_ops->refcnt, 1);
refcount_set(&cvm_ops->refcnt, 1);
vma->vm_ops = &cvm_ops->vm_ops;
}
@ -238,11 +239,10 @@ int coda_release(struct inode *coda_inode, struct file *coda_file)
struct coda_file_info *cfi;
struct coda_inode_info *cii;
struct inode *host_inode;
int err;
cfi = coda_ftoc(coda_file);
err = venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
venus_close(coda_inode->i_sb, coda_i2f(coda_inode),
coda_flags, coda_file->f_cred->fsuid);
host_inode = file_inode(cfi->cfi_container);

14
fs/coda/psdev.c
View File

@ -122,14 +122,10 @@ static ssize_t coda_psdev_write(struct file *file, const char __user *buf,
hdr.opcode, hdr.unique);
nbytes = size;
}
dcbuf = kvmalloc(nbytes, GFP_KERNEL);
if (!dcbuf) {
retval = -ENOMEM;
goto out;
}
if (copy_from_user(dcbuf, buf, nbytes)) {
kvfree(dcbuf);
retval = -EFAULT;
dcbuf = vmemdup_user(buf, nbytes);
if (IS_ERR(dcbuf)) {
retval = PTR_ERR(dcbuf);
goto out;
}
@ -388,7 +384,7 @@ MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
MODULE_LICENSE("GPL");
MODULE_VERSION("7.0");
MODULE_VERSION("7.2");
static int __init init_coda(void)
{

3
fs/coda/upcall.c
View File

@ -744,7 +744,8 @@ static int coda_upcall(struct venus_comm *vcp,
list_add_tail(&req->uc_chain, &vcp->vc_pending);
wake_up_interruptible(&vcp->vc_waitq);
if (req->uc_flags & CODA_REQ_ASYNC) {
/* We can return early on asynchronous requests */
if (outSize == NULL) {
mutex_unlock(&vcp->vc_mutex);
return 0;
}

6
fs/hfs/inode.c
View File

@ -462,8 +462,7 @@ int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
goto out;
if (S_ISDIR(main_inode->i_mode)) {
if (fd.entrylength < sizeof(struct hfs_cat_dir))
/* panic? */;
WARN_ON(fd.entrylength < sizeof(struct hfs_cat_dir));
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
sizeof(struct hfs_cat_dir));
if (rec.type != HFS_CDR_DIR ||
@ -483,8 +482,7 @@ int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
sizeof(struct hfs_cat_file));
} else {
if (fd.entrylength < sizeof(struct hfs_cat_file))
/* panic? */;
WARN_ON(fd.entrylength < sizeof(struct hfs_cat_file));
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
sizeof(struct hfs_cat_file));
if (rec.type != HFS_CDR_FIL ||

12
fs/hfsplus/inode.c
View File

@ -509,8 +509,7 @@ int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
if (type == HFSPLUS_FOLDER) {
struct hfsplus_cat_folder *folder = &entry.folder;
if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
/* panic? */;
WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_folder));
hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
sizeof(struct hfsplus_cat_folder));
hfsplus_get_perms(inode, &folder->permissions, 1);
@ -530,8 +529,7 @@ int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
} else if (type == HFSPLUS_FILE) {
struct hfsplus_cat_file *file = &entry.file;
if (fd->entrylength < sizeof(struct hfsplus_cat_file))
/* panic? */;
WARN_ON(fd->entrylength < sizeof(struct hfsplus_cat_file));
hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
sizeof(struct hfsplus_cat_file));
@ -588,8 +586,7 @@ int hfsplus_cat_write_inode(struct inode *inode)
if (S_ISDIR(main_inode->i_mode)) {
struct hfsplus_cat_folder *folder = &entry.folder;
if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
/* panic? */;
WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_folder));
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_folder));
/* simple node checks? */
@ -614,8 +611,7 @@ int hfsplus_cat_write_inode(struct inode *inode)
} else {
struct hfsplus_cat_file *file = &entry.file;
if (fd.entrylength < sizeof(struct hfsplus_cat_file))
/* panic? */;
WARN_ON(fd.entrylength < sizeof(struct hfsplus_cat_file));
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
sizeof(struct hfsplus_cat_file));
hfsplus_inode_write_fork(inode, &file->data_fork);

23
fs/hugetlbfs/inode.c
View File

@ -1446,8 +1446,8 @@ static int get_hstate_idx(int page_size_log)
* otherwise hugetlb_reserve_pages reserves one less hugepages than intended.
*/
struct file *hugetlb_file_setup(const char *name, size_t size,
vm_flags_t acctflag, struct ucounts **ucounts,
int creat_flags, int page_size_log)
vm_flags_t acctflag, int creat_flags,
int page_size_log)
{
struct inode *inode;
struct vfsmount *mnt;
@ -1458,22 +1458,19 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
if (hstate_idx < 0)
return ERR_PTR(-ENODEV);
*ucounts = NULL;
mnt = hugetlbfs_vfsmount[hstate_idx];
if (!mnt)
return ERR_PTR(-ENOENT);
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
*ucounts = current_ucounts();
if (user_shm_lock(size, *ucounts)) {
task_lock(current);
pr_warn_once("%s (%d): Using mlock ulimits for SHM_HUGETLB is deprecated\n",
struct ucounts *ucounts = current_ucounts();
if (user_shm_lock(size, ucounts)) {
pr_warn_once("%s (%d): Using mlock ulimits for SHM_HUGETLB is obsolete\n",
current->comm, current->pid);
task_unlock(current);
} else {
*ucounts = NULL;
return ERR_PTR(-EPERM);
user_shm_unlock(size, ucounts);
}
return ERR_PTR(-EPERM);
}
file = ERR_PTR(-ENOSPC);
@ -1498,10 +1495,6 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
iput(inode);
out:
if (*ucounts) {
user_shm_unlock(size, *ucounts);
*ucounts = NULL;
}
return file;
}

46
fs/inode.c
View File

@ -428,11 +428,20 @@ void ihold(struct inode *inode)
}
EXPORT_SYMBOL(ihold);
static void inode_lru_list_add(struct inode *inode)
static void __inode_add_lru(struct inode *inode, bool rotate)
{
if (inode->i_state & (I_DIRTY_ALL | I_SYNC | I_FREEING | I_WILL_FREE))
return;
if (atomic_read(&inode->i_count))
return;
if (!(inode->i_sb->s_flags & SB_ACTIVE))
return;
if (!mapping_shrinkable(&inode->i_data))
return;
if (list_lru_add(&inode->i_sb->s_inode_lru, &inode->i_lru))
this_cpu_inc(nr_unused);
else
else if (rotate)
inode->i_state |= I_REFERENCED;
}
@ -443,16 +452,11 @@ static void inode_lru_list_add(struct inode *inode)
*/
void inode_add_lru(struct inode *inode)
{
if (!(inode->i_state & (I_DIRTY_ALL | I_SYNC |
I_FREEING | I_WILL_FREE)) &&
!atomic_read(&inode->i_count) && inode->i_sb->s_flags & SB_ACTIVE)
inode_lru_list_add(inode);
__inode_add_lru(inode, false);
}
static void inode_lru_list_del(struct inode *inode)
{
if (list_lru_del(&inode->i_sb->s_inode_lru, &inode->i_lru))
this_cpu_dec(nr_unused);
}
@ -728,10 +732,6 @@ again:
/*
* Isolate the inode from the LRU in preparation for freeing it.
*
* Any inodes which are pinned purely because of attached pagecache have their
* pagecache removed. If the inode has metadata buffers attached to
* mapping->private_list then try to remove them.
*
* If the inode has the I_REFERENCED flag set, then it means that it has been
* used recently - the flag is set in iput_final(). When we encounter such an
* inode, clear the flag and move it to the back of the LRU so it gets another
@ -747,31 +747,39 @@ static enum lru_status inode_lru_isolate(struct list_head *item,
struct inode *inode = container_of(item, struct inode, i_lru);
/*
* we are inverting the lru lock/inode->i_lock here, so use a trylock.
* If we fail to get the lock, just skip it.
* We are inverting the lru lock/inode->i_lock here, so use a
* trylock. If we fail to get the lock, just skip it.
*/
if (!spin_trylock(&inode->i_lock))
return LRU_SKIP;
/*
* Referenced or dirty inodes are still in use. Give them another pass
* through the LRU as we canot reclaim them now.
* Inodes can get referenced, redirtied, or repopulated while
* they're already on the LRU, and this can make them
* unreclaimable for a while. Remove them lazily here; iput,
* sync, or the last page cache deletion will requeue them.
*/
if (atomic_read(&inode->i_count) ||
(inode->i_state & ~I_REFERENCED)) {
(inode->i_state & ~I_REFERENCED) ||
!mapping_shrinkable(&inode->i_data)) {
list_lru_isolate(lru, &inode->i_lru);
spin_unlock(&inode->i_lock);
this_cpu_dec(nr_unused);
return LRU_REMOVED;
}
/* recently referenced inodes get one more pass */
/* Recently referenced inodes get one more pass */
if (inode->i_state & I_REFERENCED) {
inode->i_state &= ~I_REFERENCED;
spin_unlock(&inode->i_lock);
return LRU_ROTATE;
}
/*
* On highmem systems, mapping_shrinkable() permits dropping
* page cache in order to free up struct inodes: lowmem might
* be under pressure before the cache inside the highmem zone.
*/
if (inode_has_buffers(inode) || !mapping_empty(&inode->i_data)) {
__iget(inode);
spin_unlock(&inode->i_lock);
@ -1638,7 +1646,7 @@ static void iput_final(struct inode *inode)
if (!drop &&
!(inode->i_state & I_DONTCACHE) &&
(sb->s_flags & SB_ACTIVE)) {
inode_add_lru(inode);
__inode_add_lru(inode, true);
spin_unlock(&inode->i_lock);
return;
}

1
fs/internal.h
View File

@ -138,7 +138,6 @@ extern int vfs_open(const struct path *, struct file *);
* inode.c
*/
extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc);
extern void inode_add_lru(struct inode *inode);
extern int dentry_needs_remove_privs(struct dentry *dentry);
/*

2
fs/nilfs2/alloc.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* alloc.c - NILFS dat/inode allocator
* NILFS dat/inode allocator
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/alloc.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* alloc.h - persistent object (dat entry/disk inode) allocator/deallocator
* Persistent object (dat entry/disk inode) allocator/deallocator
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/bmap.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* bmap.c - NILFS block mapping.
* NILFS block mapping.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/bmap.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* bmap.h - NILFS block mapping.
* NILFS block mapping.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/btnode.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* btnode.c - NILFS B-tree node cache
* NILFS B-tree node cache
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/btnode.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* btnode.h - NILFS B-tree node cache
* NILFS B-tree node cache
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/btree.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* btree.c - NILFS B-tree.
* NILFS B-tree.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/btree.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* btree.h - NILFS B-tree.
* NILFS B-tree.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/cpfile.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* cpfile.c - NILFS checkpoint file.
* NILFS checkpoint file.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/cpfile.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* cpfile.h - NILFS checkpoint file.
* NILFS checkpoint file.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/dat.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* dat.c - NILFS disk address translation.
* NILFS disk address translation.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/dat.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* dat.h - NILFS disk address translation.
* NILFS disk address translation.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/dir.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* dir.c - NILFS directory entry operations
* NILFS directory entry operations
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/direct.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* direct.c - NILFS direct block pointer.
* NILFS direct block pointer.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/direct.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* direct.h - NILFS direct block pointer.
* NILFS direct block pointer.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/file.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* file.c - NILFS regular file handling primitives including fsync().
* NILFS regular file handling primitives including fsync().
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/gcinode.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* gcinode.c - dummy inodes to buffer blocks for garbage collection
* Dummy inodes to buffer blocks for garbage collection
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/ifile.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* ifile.c - NILFS inode file
* NILFS inode file
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/ifile.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* ifile.h - NILFS inode file
* NILFS inode file
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/inode.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* inode.c - NILFS inode operations.
* NILFS inode operations.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/ioctl.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* ioctl.c - NILFS ioctl operations.
* NILFS ioctl operations.
*
* Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/mdt.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* mdt.c - meta data file for NILFS
* Meta data file for NILFS
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/mdt.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* mdt.h - NILFS meta data file prototype and definitions
* NILFS meta data file prototype and definitions
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/namei.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* namei.c - NILFS pathname lookup operations.
* NILFS pathname lookup operations.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/nilfs.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* nilfs.h - NILFS local header file.
* NILFS local header file.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/page.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* page.c - buffer/page management specific to NILFS
* Buffer/page management specific to NILFS
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/page.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* page.h - buffer/page management specific to NILFS
* Buffer/page management specific to NILFS
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/recovery.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* recovery.c - NILFS recovery logic
* NILFS recovery logic
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/segbuf.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* segbuf.c - NILFS segment buffer
* NILFS segment buffer
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/segbuf.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* segbuf.h - NILFS Segment buffer prototypes and definitions
* NILFS Segment buffer prototypes and definitions
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/segment.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* segment.c - NILFS segment constructor.
* NILFS segment constructor.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/segment.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* segment.h - NILFS Segment constructor prototypes and definitions
* NILFS Segment constructor prototypes and definitions
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/sufile.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* sufile.c - NILFS segment usage file.
* NILFS segment usage file.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/sufile.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* sufile.h - NILFS segment usage file.
* NILFS segment usage file.
*
* Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/super.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* super.c - NILFS module and super block management.
* NILFS module and super block management.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

78
fs/nilfs2/sysfs.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* sysfs.c - sysfs support implementation.
* Sysfs support implementation.
*
* Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
* Copyright (C) 2014 HGST, Inc., a Western Digital Company.
@ -95,7 +95,7 @@ static ssize_t
nilfs_snapshot_inodes_count_show(struct nilfs_snapshot_attr *attr,
struct nilfs_root *root, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%llu\n",
return sysfs_emit(buf, "%llu\n",
(unsigned long long)atomic64_read(&root->inodes_count));
}
@ -103,7 +103,7 @@ static ssize_t
nilfs_snapshot_blocks_count_show(struct nilfs_snapshot_attr *attr,
struct nilfs_root *root, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%llu\n",
return sysfs_emit(buf, "%llu\n",
(unsigned long long)atomic64_read(&root->blocks_count));
}
@ -116,7 +116,7 @@ static ssize_t
nilfs_snapshot_README_show(struct nilfs_snapshot_attr *attr,
struct nilfs_root *root, char *buf)
{
return snprintf(buf, PAGE_SIZE, snapshot_readme_str);
return sysfs_emit(buf, snapshot_readme_str);
}
NILFS_SNAPSHOT_RO_ATTR(inodes_count);
@ -217,7 +217,7 @@ static ssize_t
nilfs_mounted_snapshots_README_show(struct nilfs_mounted_snapshots_attr *attr,
struct the_nilfs *nilfs, char *buf)
{
return snprintf(buf, PAGE_SIZE, mounted_snapshots_readme_str);
return sysfs_emit(buf, mounted_snapshots_readme_str);
}
NILFS_MOUNTED_SNAPSHOTS_RO_ATTR(README);
@ -255,7 +255,7 @@ nilfs_checkpoints_checkpoints_number_show(struct nilfs_checkpoints_attr *attr,
ncheckpoints = cpstat.cs_ncps;
return snprintf(buf, PAGE_SIZE, "%llu\n", ncheckpoints);
return sysfs_emit(buf, "%llu\n", ncheckpoints);
}
static ssize_t
@ -278,7 +278,7 @@ nilfs_checkpoints_snapshots_number_show(struct nilfs_checkpoints_attr *attr,
nsnapshots = cpstat.cs_nsss;
return snprintf(buf, PAGE_SIZE, "%llu\n", nsnapshots);
return sysfs_emit(buf, "%llu\n", nsnapshots);
}
static ssize_t
@ -292,7 +292,7 @@ nilfs_checkpoints_last_seg_checkpoint_show(struct nilfs_checkpoints_attr *attr,
last_cno = nilfs->ns_last_cno;
spin_unlock(&nilfs->ns_last_segment_lock);
return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
return sysfs_emit(buf, "%llu\n", last_cno);
}
static ssize_t
@ -306,7 +306,7 @@ nilfs_checkpoints_next_checkpoint_show(struct nilfs_checkpoints_attr *attr,
cno = nilfs->ns_cno;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
return sysfs_emit(buf, "%llu\n", cno);
}
static const char checkpoints_readme_str[] =
@ -322,7 +322,7 @@ static ssize_t
nilfs_checkpoints_README_show(struct nilfs_checkpoints_attr *attr,
struct the_nilfs *nilfs, char *buf)
{
return snprintf(buf, PAGE_SIZE, checkpoints_readme_str);
return sysfs_emit(buf, checkpoints_readme_str);
}
NILFS_CHECKPOINTS_RO_ATTR(checkpoints_number);
@ -353,7 +353,7 @@ nilfs_segments_segments_number_show(struct nilfs_segments_attr *attr,
struct the_nilfs *nilfs,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_nsegments);
return sysfs_emit(buf, "%lu\n", nilfs->ns_nsegments);
}
static ssize_t
@ -361,7 +361,7 @@ nilfs_segments_blocks_per_segment_show(struct nilfs_segments_attr *attr,
struct the_nilfs *nilfs,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%lu\n", nilfs->ns_blocks_per_segment);
return sysfs_emit(buf, "%lu\n", nilfs->ns_blocks_per_segment);
}
static ssize_t
@ -375,7 +375,7 @@ nilfs_segments_clean_segments_show(struct nilfs_segments_attr *attr,
ncleansegs = nilfs_sufile_get_ncleansegs(nilfs->ns_sufile);
up_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
return snprintf(buf, PAGE_SIZE, "%lu\n", ncleansegs);
return sysfs_emit(buf, "%lu\n", ncleansegs);
}
static ssize_t
@ -395,7 +395,7 @@ nilfs_segments_dirty_segments_show(struct nilfs_segments_attr *attr,
return err;
}
return snprintf(buf, PAGE_SIZE, "%llu\n", sustat.ss_ndirtysegs);
return sysfs_emit(buf, "%llu\n", sustat.ss_ndirtysegs);
}
static const char segments_readme_str[] =
@ -411,7 +411,7 @@ nilfs_segments_README_show(struct nilfs_segments_attr *attr,
struct the_nilfs *nilfs,
char *buf)
{
return snprintf(buf, PAGE_SIZE, segments_readme_str);
return sysfs_emit(buf, segments_readme_str);
}
NILFS_SEGMENTS_RO_ATTR(segments_number);
@ -448,7 +448,7 @@ nilfs_segctor_last_pseg_block_show(struct nilfs_segctor_attr *attr,
last_pseg = nilfs->ns_last_pseg;
spin_unlock(&nilfs->ns_last_segment_lock);
return snprintf(buf, PAGE_SIZE, "%llu\n",
return sysfs_emit(buf, "%llu\n",
(unsigned long long)last_pseg);
}
@ -463,7 +463,7 @@ nilfs_segctor_last_seg_sequence_show(struct nilfs_segctor_attr *attr,
last_seq = nilfs->ns_last_seq;
spin_unlock(&nilfs->ns_last_segment_lock);
return snprintf(buf, PAGE_SIZE, "%llu\n", last_seq);
return sysfs_emit(buf, "%llu\n", last_seq);
}
static ssize_t
@ -477,7 +477,7 @@ nilfs_segctor_last_seg_checkpoint_show(struct nilfs_segctor_attr *attr,
last_cno = nilfs->ns_last_cno;
spin_unlock(&nilfs->ns_last_segment_lock);
return snprintf(buf, PAGE_SIZE, "%llu\n", last_cno);
return sysfs_emit(buf, "%llu\n", last_cno);
}
static ssize_t
@ -491,7 +491,7 @@ nilfs_segctor_current_seg_sequence_show(struct nilfs_segctor_attr *attr,
seg_seq = nilfs->ns_seg_seq;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", seg_seq);
return sysfs_emit(buf, "%llu\n", seg_seq);
}
static ssize_t
@ -505,7 +505,7 @@ nilfs_segctor_current_last_full_seg_show(struct nilfs_segctor_attr *attr,
segnum = nilfs->ns_segnum;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", segnum);
return sysfs_emit(buf, "%llu\n", segnum);
}
static ssize_t
@ -519,7 +519,7 @@ nilfs_segctor_next_full_seg_show(struct nilfs_segctor_attr *attr,
nextnum = nilfs->ns_nextnum;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", nextnum);
return sysfs_emit(buf, "%llu\n", nextnum);
}
static ssize_t
@ -533,7 +533,7 @@ nilfs_segctor_next_pseg_offset_show(struct nilfs_segctor_attr *attr,
pseg_offset = nilfs->ns_pseg_offset;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%lu\n", pseg_offset);
return sysfs_emit(buf, "%lu\n", pseg_offset);
}
static ssize_t
@ -547,7 +547,7 @@ nilfs_segctor_next_checkpoint_show(struct nilfs_segctor_attr *attr,
cno = nilfs->ns_cno;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", cno);
return sysfs_emit(buf, "%llu\n", cno);
}
static ssize_t
@ -575,7 +575,7 @@ nilfs_segctor_last_seg_write_time_secs_show(struct nilfs_segctor_attr *attr,
ctime = nilfs->ns_ctime;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", ctime);
return sysfs_emit(buf, "%llu\n", ctime);
}
static ssize_t
@ -603,7 +603,7 @@ nilfs_segctor_last_nongc_write_time_secs_show(struct nilfs_segctor_attr *attr,
nongc_ctime = nilfs->ns_nongc_ctime;
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", nongc_ctime);
return sysfs_emit(buf, "%llu\n", nongc_ctime);
}
static ssize_t
@ -617,7 +617,7 @@ nilfs_segctor_dirty_data_blocks_count_show(struct nilfs_segctor_attr *attr,
ndirtyblks = atomic_read(&nilfs->ns_ndirtyblks);
up_read(&nilfs->ns_segctor_sem);
return snprintf(buf, PAGE_SIZE, "%u\n", ndirtyblks);
return sysfs_emit(buf, "%u\n", ndirtyblks);
}
static const char segctor_readme_str[] =
@ -654,7 +654,7 @@ static ssize_t
nilfs_segctor_README_show(struct nilfs_segctor_attr *attr,
struct the_nilfs *nilfs, char *buf)
{
return snprintf(buf, PAGE_SIZE, segctor_readme_str);
return sysfs_emit(buf, segctor_readme_str);
}
NILFS_SEGCTOR_RO_ATTR(last_pseg_block);
@ -723,7 +723,7 @@ nilfs_superblock_sb_write_time_secs_show(struct nilfs_superblock_attr *attr,
sbwtime = nilfs->ns_sbwtime;
up_read(&nilfs->ns_sem);
return snprintf(buf, PAGE_SIZE, "%llu\n", sbwtime);
return sysfs_emit(buf, "%llu\n", sbwtime);
}
static ssize_t
@ -737,7 +737,7 @@ nilfs_superblock_sb_write_count_show(struct nilfs_superblock_attr *attr,
sbwcount = nilfs->ns_sbwcount;
up_read(&nilfs->ns_sem);
return snprintf(buf, PAGE_SIZE, "%u\n", sbwcount);
return sysfs_emit(buf, "%u\n", sbwcount);
}
static ssize_t
@ -751,7 +751,7 @@ nilfs_superblock_sb_update_frequency_show(struct nilfs_superblock_attr *attr,
sb_update_freq = nilfs->ns_sb_update_freq;
up_read(&nilfs->ns_sem);
return snprintf(buf, PAGE_SIZE, "%u\n", sb_update_freq);
return sysfs_emit(buf, "%u\n", sb_update_freq);
}
static ssize_t
@ -799,7 +799,7 @@ static ssize_t
nilfs_superblock_README_show(struct nilfs_superblock_attr *attr,
struct the_nilfs *nilfs, char *buf)
{
return snprintf(buf, PAGE_SIZE, sb_readme_str);
return sysfs_emit(buf, sb_readme_str);
}
NILFS_SUPERBLOCK_RO_ATTR(sb_write_time);
@ -834,7 +834,7 @@ ssize_t nilfs_dev_revision_show(struct nilfs_dev_attr *attr,
u32 major = le32_to_cpu(sbp[0]->s_rev_level);
u16 minor = le16_to_cpu(sbp[0]->s_minor_rev_level);
return snprintf(buf, PAGE_SIZE, "%d.%d\n", major, minor);
return sysfs_emit(buf, "%d.%d\n", major, minor);
}
static
@ -842,7 +842,7 @@ ssize_t nilfs_dev_blocksize_show(struct nilfs_dev_attr *attr,
struct the_nilfs *nilfs,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%u\n", nilfs->ns_blocksize);
return sysfs_emit(buf, "%u\n", nilfs->ns_blocksize);
}
static
@ -853,7 +853,7 @@ ssize_t nilfs_dev_device_size_show(struct nilfs_dev_attr *attr,
struct nilfs_super_block **sbp = nilfs->ns_sbp;
u64 dev_size = le64_to_cpu(sbp[0]->s_dev_size);
return snprintf(buf, PAGE_SIZE, "%llu\n", dev_size);
return sysfs_emit(buf, "%llu\n", dev_size);
}
static
@ -864,7 +864,7 @@ ssize_t nilfs_dev_free_blocks_show(struct nilfs_dev_attr *attr,
sector_t free_blocks = 0;
nilfs_count_free_blocks(nilfs, &free_blocks);
return snprintf(buf, PAGE_SIZE, "%llu\n",
return sysfs_emit(buf, "%llu\n",
(unsigned long long)free_blocks);
}
@ -875,7 +875,7 @@ ssize_t nilfs_dev_uuid_show(struct nilfs_dev_attr *attr,
{
struct nilfs_super_block **sbp = nilfs->ns_sbp;
return snprintf(buf, PAGE_SIZE, "%pUb\n", sbp[0]->s_uuid);
return sysfs_emit(buf, "%pUb\n", sbp[0]->s_uuid);
}
static
@ -903,7 +903,7 @@ static ssize_t nilfs_dev_README_show(struct nilfs_dev_attr *attr,
struct the_nilfs *nilfs,
char *buf)
{
return snprintf(buf, PAGE_SIZE, dev_readme_str);
return sysfs_emit(buf, dev_readme_str);
}
NILFS_DEV_RO_ATTR(revision);
@ -1047,7 +1047,7 @@ void nilfs_sysfs_delete_device_group(struct the_nilfs *nilfs)
static ssize_t nilfs_feature_revision_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d.%d\n",
return sysfs_emit(buf, "%d.%d\n",
NILFS_CURRENT_REV, NILFS_MINOR_REV);
}
@ -1060,7 +1060,7 @@ static ssize_t nilfs_feature_README_show(struct kobject *kobj,
struct attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, features_readme_str);
return sysfs_emit(buf, features_readme_str);
}
NILFS_FEATURE_RO_ATTR(revision);

2
fs/nilfs2/sysfs.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* sysfs.h - sysfs support declarations.
* Sysfs support declarations.
*
* Copyright (C) 2005-2014 Nippon Telegraph and Telephone Corporation.
* Copyright (C) 2014 HGST, Inc., a Western Digital Company.

2
fs/nilfs2/the_nilfs.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* the_nilfs.c - the_nilfs shared structure.
* the_nilfs shared structure.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

2
fs/nilfs2/the_nilfs.h
View File

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* the_nilfs.h - the_nilfs shared structure.
* the_nilfs shared structure.
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*

21
fs/proc/base.c
View File

@ -1982,19 +1982,21 @@ static int pid_revalidate(struct dentry *dentry, unsigned int flags)
{
struct inode *inode;
struct task_struct *task;
int ret = 0;
if (flags & LOOKUP_RCU)
return -ECHILD;
inode = d_inode(dentry);
task = get_proc_task(inode);
rcu_read_lock();
inode = d_inode_rcu(dentry);
if (!inode)
goto out;
task = pid_task(proc_pid(inode), PIDTYPE_PID);
if (task) {
pid_update_inode(task, inode);
put_task_struct(task);
return 1;
ret = 1;
}
return 0;
out:
rcu_read_unlock();
return ret;
}
static inline bool proc_inode_is_dead(struct inode *inode)
@ -3802,7 +3804,10 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
task = next_tid(task), ctx->pos++) {
char name[10 + 1];
unsigned int len;
tid = task_pid_nr_ns(task, ns);
if (!tid)
continue; /* The task has just exited. */
len = snprintf(name, sizeof(name), "%u", tid);
if (!proc_fill_cache(file, ctx, name, len,
proc_task_instantiate, task, NULL)) {

113
fs/proc/vmcore.c
View File

@ -62,46 +62,75 @@ core_param(novmcoredd, vmcoredd_disabled, bool, 0);
/* Device Dump Size */
static size_t vmcoredd_orig_sz;
/*
* Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
* The called function has to take care of module refcounting.
*/
static int (*oldmem_pfn_is_ram)(unsigned long pfn);
static DECLARE_RWSEM(vmcore_cb_rwsem);
/* List of registered vmcore callbacks. */
static LIST_HEAD(vmcore_cb_list);
/* Whether we had a surprise unregistration of a callback. */
static bool vmcore_cb_unstable;
/* Whether the vmcore has been opened once. */
static bool vmcore_opened;
int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn))
void register_vmcore_cb(struct vmcore_cb *cb)
{
if (oldmem_pfn_is_ram)
return -EBUSY;
oldmem_pfn_is_ram = fn;
return 0;
}
EXPORT_SYMBOL_GPL(register_oldmem_pfn_is_ram);
void unregister_oldmem_pfn_is_ram(void)
{
oldmem_pfn_is_ram = NULL;
wmb();
}
EXPORT_SYMBOL_GPL(unregister_oldmem_pfn_is_ram);
static int pfn_is_ram(unsigned long pfn)
{
int (*fn)(unsigned long pfn);
/* pfn is ram unless fn() checks pagetype */
int ret = 1;
down_write(&vmcore_cb_rwsem);
INIT_LIST_HEAD(&cb->next);
list_add_tail(&cb->next, &vmcore_cb_list);
/*
* Ask hypervisor if the pfn is really ram.
* A ballooned page contains no data and reading from such a page
* will cause high load in the hypervisor.
* Registering a vmcore callback after the vmcore was opened is
* very unusual (e.g., manual driver loading).
*/
fn = oldmem_pfn_is_ram;
if (fn)
ret = fn(pfn);
if (vmcore_opened)
pr_warn_once("Unexpected vmcore callback registration\n");
up_write(&vmcore_cb_rwsem);
}
EXPORT_SYMBOL_GPL(register_vmcore_cb);
void unregister_vmcore_cb(struct vmcore_cb *cb)
{
down_write(&vmcore_cb_rwsem);
list_del(&cb->next);
/*
* Unregistering a vmcore callback after the vmcore was opened is
* very unusual (e.g., forced driver removal), but we cannot stop
* unregistering.
*/
if (vmcore_opened) {
pr_warn_once("Unexpected vmcore callback unregistration\n");
vmcore_cb_unstable = true;
}
up_write(&vmcore_cb_rwsem);
}
EXPORT_SYMBOL_GPL(unregister_vmcore_cb);
static bool pfn_is_ram(unsigned long pfn)
{
struct vmcore_cb *cb;
bool ret = true;
lockdep_assert_held_read(&vmcore_cb_rwsem);
if (unlikely(vmcore_cb_unstable))
return false;
list_for_each_entry(cb, &vmcore_cb_list, next) {
if (unlikely(!cb->pfn_is_ram))
continue;
ret = cb->pfn_is_ram(cb, pfn);
if (!ret)
break;
}
return ret;
}
static int open_vmcore(struct inode *inode, struct file *file)
{
down_read(&vmcore_cb_rwsem);
vmcore_opened = true;
up_read(&vmcore_cb_rwsem);
return 0;
}
/* Reads a page from the oldmem device from given offset. */
ssize_t read_from_oldmem(char *buf, size_t count,
u64 *ppos, int userbuf,
@ -117,6 +146,7 @@ ssize_t read_from_oldmem(char *buf, size_t count,
offset = (unsigned long)(*ppos % PAGE_SIZE);
pfn = (unsigned long)(*ppos / PAGE_SIZE);
down_read(&vmcore_cb_rwsem);
do {
if (count > (PAGE_SIZE - offset))
nr_bytes = PAGE_SIZE - offset;
@ -124,7 +154,7 @@ ssize_t read_from_oldmem(char *buf, size_t count,
nr_bytes = count;
/* If pfn is not ram, return zeros for sparse dump files */
if (pfn_is_ram(pfn) == 0)
if (!pfn_is_ram(pfn))
memset(buf, 0, nr_bytes);
else {
if (encrypted)
@ -136,8 +166,10 @@ ssize_t read_from_oldmem(char *buf, size_t count,
tmp = copy_oldmem_page(pfn, buf, nr_bytes,
offset, userbuf);
if (tmp < 0)
if (tmp < 0) {
up_read(&vmcore_cb_rwsem);
return tmp;
}
}
*ppos += nr_bytes;
count -= nr_bytes;
@ -147,6 +179,7 @@ ssize_t read_from_oldmem(char *buf, size_t count,
offset = 0;
} while (count);
up_read(&vmcore_cb_rwsem);
return read;
}
@ -537,14 +570,19 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma,
unsigned long from, unsigned long pfn,
unsigned long size, pgprot_t prot)
{
int ret;
/*
* Check if oldmem_pfn_is_ram was registered to avoid
* looping over all pages without a reason.
*/
if (oldmem_pfn_is_ram)
return remap_oldmem_pfn_checked(vma, from, pfn, size, prot);
down_read(&vmcore_cb_rwsem);
if (!list_empty(&vmcore_cb_list) || vmcore_cb_unstable)
ret = remap_oldmem_pfn_checked(vma, from, pfn, size, prot);
else
return remap_oldmem_pfn_range(vma, from, pfn, size, prot);
ret = remap_oldmem_pfn_range(vma, from, pfn, size, prot);
up_read(&vmcore_cb_rwsem);
return ret;
}
static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
@ -668,6 +706,7 @@ static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
#endif
static const struct proc_ops vmcore_proc_ops = {
.proc_open = open_vmcore,
.proc_read = read_vmcore,
.proc_lseek = default_llseek,
.proc_mmap = mmap_vmcore,

11
fs/ramfs/inode.c
View File

@ -204,17 +204,20 @@ static int ramfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
int opt;
opt = fs_parse(fc, ramfs_fs_parameters, param, &result);
if (opt < 0) {
if (opt == -ENOPARAM) {
opt = vfs_parse_fs_param_source(fc, param);
if (opt != -ENOPARAM)
return opt;
/*
* We might like to report bad mount options here;
* but traditionally ramfs has ignored all mount options,
* and as it is used as a !CONFIG_SHMEM simple substitute
* for tmpfs, better continue to ignore other mount options.
*/
if (opt == -ENOPARAM)
opt = 0;
return opt;
return 0;
}
if (opt < 0)
return opt;
switch (opt) {
case Opt_mode:

16
fs/seq_file.c
View File

@ -383,22 +383,6 @@ void seq_escape_mem(struct seq_file *m, const char *src, size_t len,
}
EXPORT_SYMBOL(seq_escape_mem);
/**
* seq_escape - print string into buffer, escaping some characters
* @m: target buffer
* @s: string
* @esc: set of characters that need escaping
*
* Puts string into buffer, replacing each occurrence of character from
* @esc with usual octal escape.
* Use seq_has_overflowed() to check for errors.
*/
void seq_escape(struct seq_file *m, const char *s, const char *esc)
{
seq_escape_str(m, s, ESCAPE_OCTAL, esc);
}
EXPORT_SYMBOL(seq_escape);
void seq_vprintf(struct seq_file *m, const char *f, va_list args)
{
int len;

6
fs/sysv/super.c
View File

@ -474,10 +474,8 @@ static int v7_fill_super(struct super_block *sb, void *data, int silent)
struct sysv_sb_info *sbi;
struct buffer_head *bh;
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
BUILD_BUG_ON(sizeof(struct v7_super_block) != 440);
BUILD_BUG_ON(sizeof(struct sysv_inode) != 64);
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
if (!sbi)

75
include/asm-generic/sections.h
View File

@ -64,22 +64,6 @@ extern __visible const void __nosave_begin, __nosave_end;
#define dereference_kernel_function_descriptor(p) ((void *)(p))
#endif
/* random extra sections (if any). Override
* in asm/sections.h */
#ifndef arch_is_kernel_text
static inline int arch_is_kernel_text(unsigned long addr)
{
return 0;
}
#endif
#ifndef arch_is_kernel_data
static inline int arch_is_kernel_data(unsigned long addr)
{
return 0;
}
#endif
/**
* memory_contains - checks if an object is contained within a memory region
* @begin: virtual address of the beginning of the memory region
@ -144,6 +128,22 @@ static inline bool init_section_intersects(void *virt, size_t size)
return memory_intersects(__init_begin, __init_end, virt, size);
}
/**
* is_kernel_core_data - checks if the pointer address is located in the
* .data section
*
* @addr: address to check
*
* Returns: true if the address is located in .data, false otherwise.
* Note: On some archs it may return true for core RODATA, and false
* for others. But will always be true for core RW data.
*/
static inline bool is_kernel_core_data(unsigned long addr)
{
return addr >= (unsigned long)_sdata &&
addr < (unsigned long)_edata;
}
/**
* is_kernel_rodata - checks if the pointer address is located in the
* .rodata section
@ -158,4 +158,47 @@ static inline bool is_kernel_rodata(unsigned long addr)
addr < (unsigned long)__end_rodata;
}
/**
* is_kernel_inittext - checks if the pointer address is located in the
* .init.text section
*
* @addr: address to check
*
* Returns: true if the address is located in .init.text, false otherwise.
*/
static inline bool is_kernel_inittext(unsigned long addr)
{
return addr >= (unsigned long)_sinittext &&
addr < (unsigned long)_einittext;
}
/**
* __is_kernel_text - checks if the pointer address is located in the
* .text section
*
* @addr: address to check
*
* Returns: true if the address is located in .text, false otherwise.
* Note: an internal helper, only check the range of _stext to _etext.
*/
static inline bool __is_kernel_text(unsigned long addr)
{
return addr >= (unsigned long)_stext &&
addr < (unsigned long)_etext;
}
/**
* __is_kernel - checks if the pointer address is located in the kernel range
*
* @addr: address to check
*
* Returns: true if the address is located in the kernel range, false otherwise.
* Note: an internal helper, only check the range of _stext to _end.
*/
static inline bool __is_kernel(unsigned long addr)
{
return addr >= (unsigned long)_stext &&
addr < (unsigned long)_end;
}
#endif /* _ASM_GENERIC_SECTIONS_H_ */

13
include/kunit/test.h
View File

@ -11,11 +11,20 @@
#include <kunit/assert.h>
#include <kunit/try-catch.h>
#include <linux/kernel.h>
#include <linux/container_of.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kconfig.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/kref.h>
#include <asm/rwonce.h>
struct kunit_resource;

1
include/linux/bottom_half.h
View File

@ -2,6 +2,7 @@
#ifndef _LINUX_BH_H
#define _LINUX_BH_H
#include <linux/instruction_pointer.h>
#include <linux/preempt.h>
#if defined(CONFIG_PREEMPT_RT) || defined(CONFIG_TRACE_IRQFLAGS)

40
include/linux/container_of.h Normal file
View File

@ -0,0 +1,40 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_CONTAINER_OF_H
#define _LINUX_CONTAINER_OF_H
#include <linux/build_bug.h>
#include <linux/err.h>
#define typeof_member(T, m) typeof(((T*)0)->m)
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
void *__mptr = (void *)(ptr); \
static_assert(__same_type(*(ptr), ((type *)0)->member) || \
__same_type(*(ptr), void), \
"pointer type mismatch in container_of()"); \
((type *)(__mptr - offsetof(type, member))); })
/**
* container_of_safe - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
* If IS_ERR_OR_NULL(ptr), ptr is returned unchanged.
*/
#define container_of_safe(ptr, type, member) ({ \
void *__mptr = (void *)(ptr); \
static_assert(__same_type(*(ptr), ((type *)0)->member) || \
__same_type(*(ptr), void), \
"pointer type mismatch in container_of_safe()"); \
IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \
((type *)(__mptr - offsetof(type, member))); })
#endif /* _LINUX_CONTAINER_OF_H */

30
include/linux/crash_dump.h
View File

@ -8,8 +8,6 @@
#include <linux/pgtable.h>
#include <uapi/linux/vmcore.h>
#include <linux/pgtable.h> /* for pgprot_t */
/* For IS_ENABLED(CONFIG_CRASH_DUMP) */
#define ELFCORE_ADDR_MAX (-1ULL)
#define ELFCORE_ADDR_ERR (-2ULL)
@ -91,12 +89,32 @@ static inline void vmcore_unusable(void)
elfcorehdr_addr = ELFCORE_ADDR_ERR;
}
#define HAVE_OLDMEM_PFN_IS_RAM 1
extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
extern void unregister_oldmem_pfn_is_ram(void);
/**
* struct vmcore_cb - driver callbacks for /proc/vmcore handling
* @pfn_is_ram: check whether a PFN really is RAM and should be accessed when
* reading the vmcore. Will return "true" if it is RAM or if the
* callback cannot tell. If any callback returns "false", it's not
* RAM and the page must not be accessed; zeroes should be
* indicated in the vmcore instead. For example, a ballooned page
* contains no data and reading from such a page will cause high
* load in the hypervisor.
* @next: List head to manage registered callbacks internally; initialized by
* register_vmcore_cb().
*
* vmcore callbacks allow drivers managing physical memory ranges to
* coordinate with vmcore handling code, for example, to prevent accessing
* physical memory ranges that should not be accessed when reading the vmcore,
* although included in the vmcore header as memory ranges to dump.
*/
struct vmcore_cb {
bool (*pfn_is_ram)(struct vmcore_cb *cb, unsigned long pfn);
struct list_head next;
};
extern void register_vmcore_cb(struct vmcore_cb *cb);
extern void unregister_vmcore_cb(struct vmcore_cb *cb);
#else /* !CONFIG_CRASH_DUMP */
static inline bool is_kdump_kernel(void) { return 0; }
static inline bool is_kdump_kernel(void) { return false; }
#endif /* CONFIG_CRASH_DUMP */
/* Device Dump information to be filled by drivers */

2
include/linux/delay.h
View File

@ -19,7 +19,7 @@
* https://lists.openwall.net/linux-kernel/2011/01/09/56
*/
#include <linux/kernel.h>
#include <linux/math.h>
extern unsigned long loops_per_jiffy;

1
include/linux/fs.h
View File

@ -3193,6 +3193,7 @@ static inline void remove_inode_hash(struct inode *inode)
}
extern void inode_sb_list_add(struct inode *inode);
extern void inode_add_lru(struct inode *inode);
extern int sb_set_blocksize(struct super_block *, int);
extern int sb_min_blocksize(struct super_block *, int);

3
include/linux/generic-radix-tree.h
View File

@ -38,8 +38,9 @@
#include <asm/page.h>
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/log2.h>
#include <linux/math.h>
#include <linux/types.h>
struct genradix_root;

6
include/linux/hugetlb.h
View File

@ -477,8 +477,7 @@ static inline struct hugetlbfs_inode_info *HUGETLBFS_I(struct inode *inode)
extern const struct file_operations hugetlbfs_file_operations;
extern const struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
struct ucounts **ucounts, int creat_flags,
int page_size_log);
int creat_flags, int page_size_log);
static inline bool is_file_hugepages(struct file *file)
{
@ -497,8 +496,7 @@ static inline struct hstate *hstate_inode(struct inode *i)
#define is_file_hugepages(file) false
static inline struct file *
hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
struct ucounts **ucounts, int creat_flags,
int page_size_log)
int creat_flags, int page_size_log)
{
return ERR_PTR(-ENOSYS);
}

8
include/linux/instruction_pointer.h Normal file
View File

@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_INSTRUCTION_POINTER_H
#define _LINUX_INSTRUCTION_POINTER_H
#define _RET_IP_ (unsigned long)__builtin_return_address(0)
#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
#endif /* _LINUX_INSTRUCTION_POINTER_H */

13
include/linux/kallsyms.h
View File

@ -24,25 +24,16 @@
struct cred;
struct module;
static inline int is_kernel_inittext(unsigned long addr)
{
if (addr >= (unsigned long)_sinittext
&& addr <= (unsigned long)_einittext)
return 1;
return 0;
}
static inline int is_kernel_text(unsigned long addr)
{
if ((addr >= (unsigned long)_stext && addr <= (unsigned long)_etext) ||
arch_is_kernel_text(addr))
if (__is_kernel_text(addr))
return 1;
return in_gate_area_no_mm(addr);
}
static inline int is_kernel(unsigned long addr)
{
if (addr >= (unsigned long)_stext && addr <= (unsigned long)_end)
if (__is_kernel(addr))
return 1;
return in_gate_area_no_mm(addr);
}

39
include/linux/kernel.h
View File

@ -9,6 +9,7 @@
#include <linux/stddef.h>
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/container_of.h>
#include <linux/bitops.h>
#include <linux/kstrtox.h>
#include <linux/log2.h>
@ -19,6 +20,7 @@
#include <linux/printk.h>
#include <linux/build_bug.h>
#include <linux/static_call_types.h>
#include <linux/instruction_pointer.h>
#include <asm/byteorder.h>
#include <uapi/linux/kernel.h>
@ -52,11 +54,6 @@
} \
)
#define typeof_member(T, m) typeof(((T*)0)->m)
#define _RET_IP_ (unsigned long)__builtin_return_address(0)
#define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; })
/**
* upper_32_bits - return bits 32-63 of a number
* @n: the number we're accessing
@ -228,8 +225,6 @@ extern bool parse_option_str(const char *str, const char *option);
extern char *next_arg(char *args, char **param, char **val);
extern int core_kernel_text(unsigned long addr);
extern int init_kernel_text(unsigned long addr);
extern int core_kernel_data(unsigned long addr);
extern int __kernel_text_address(unsigned long addr);
extern int kernel_text_address(unsigned long addr);
extern int func_ptr_is_kernel_text(void *ptr);
@ -483,36 +478,6 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }
#define __CONCAT(a, b) a ## b
#define CONCATENATE(a, b) __CONCAT(a, b)
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
*/
#define container_of(ptr, type, member) ({ \
void *__mptr = (void *)(ptr); \
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
!__same_type(*(ptr), void), \
"pointer type mismatch in container_of()"); \
((type *)(__mptr - offsetof(type, member))); })
/**
* container_of_safe - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
* @type: the type of the container struct this is embedded in.
* @member: the name of the member within the struct.
*
* If IS_ERR_OR_NULL(ptr), ptr is returned unchanged.
*/
#define container_of_safe(ptr, type, member) ({ \
void *__mptr = (void *)(ptr); \
BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) && \
!__same_type(*(ptr), void), \
"pointer type mismatch in container_of()"); \
IS_ERR_OR_NULL(__mptr) ? ERR_CAST(__mptr) : \
((type *)(__mptr - offsetof(type, member))); })
/* Rebuild everything on CONFIG_FTRACE_MCOUNT_RECORD */
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
# define REBUILD_DUE_TO_FTRACE_MCOUNT_RECORD

4
include/linux/list.h
View File

@ -2,11 +2,13 @@
#ifndef _LINUX_LIST_H
#define _LINUX_LIST_H
#include <linux/container_of.h>
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/poison.h>
#include <linux/const.h>
#include <linux/kernel.h>
#include <asm/barrier.h>
/*
* Circular doubly linked list implementation.

4
include/linux/llist.h
View File

@ -49,7 +49,9 @@
*/
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/container_of.h>
#include <linux/stddef.h>
#include <linux/types.h>
struct llist_head {
struct llist_node *first;

50
include/linux/pagemap.h
View File

@ -23,6 +23,56 @@ static inline bool mapping_empty(struct address_space *mapping)
return xa_empty(&mapping->i_pages);
}
/*
* mapping_shrinkable - test if page cache state allows inode reclaim
* @mapping: the page cache mapping
*
* This checks the mapping's cache state for the pupose of inode
* reclaim and LRU management.
*
* The caller is expected to hold the i_lock, but is not required to
* hold the i_pages lock, which usually protects cache state. That's
* because the i_lock and the list_lru lock that protect the inode and
* its LRU state don't nest inside the irq-safe i_pages lock.
*
* Cache deletions are performed under the i_lock, which ensures that
* when an inode goes empty, it will reliably get queued on the LRU.
*
* Cache additions do not acquire the i_lock and may race with this
* check, in which case we'll report the inode as shrinkable when it
* has cache pages. This is okay: the shrinker also checks the
* refcount and the referenced bit, which will be elevated or set in
* the process of adding new cache pages to an inode.
*/
static inline bool mapping_shrinkable(struct address_space *mapping)
{
void *head;
/*
* On highmem systems, there could be lowmem pressure from the
* inodes before there is highmem pressure from the page
* cache. Make inodes shrinkable regardless of cache state.
*/
if (IS_ENABLED(CONFIG_HIGHMEM))
return true;
/* Cache completely empty? Shrink away. */
head = rcu_access_pointer(mapping->i_pages.xa_head);
if (!head)
return true;
/*
* The xarray stores single offset-0 entries directly in the
* head pointer, which allows non-resident page cache entries
* to escape the shadow shrinker's list of xarray nodes. The
* inode shrinker needs to pick them up under memory pressure.
*/
if (!xa_is_node(head) && xa_is_value(head))
return true;
return false;
}
/*
* Bits in mapping->flags.
*/

5
include/linux/plist.h
View File

@ -73,8 +73,11 @@
#ifndef _LINUX_PLIST_H_
#define _LINUX_PLIST_H_
#include <linux/kernel.h>
#include <linux/container_of.h>
#include <linux/list.h>
#include <linux/types.h>
#include <asm/bug.h>
struct plist_head {
struct list_head node_list;

4
include/linux/radix-tree.h
View File

@ -9,8 +9,10 @@
#define _LINUX_RADIX_TREE_H
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/list.h>
#include <linux/lockdep.h>
#include <linux/math.h>
#include <linux/percpu.h>
#include <linux/preempt.h>
#include <linux/rcupdate.h>

1
include/linux/rwsem.h
View File

@ -11,7 +11,6 @@
#include <linux/linkage.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/atomic.h>

11
include/linux/sbitmap.h
View File

@ -9,8 +9,17 @@
#ifndef __LINUX_SCALE_BITMAP_H
#define __LINUX_SCALE_BITMAP_H
#include <linux/kernel.h>
#include <linux/atomic.h>
#include <linux/bitops.h>
#include <linux/cache.h>
#include <linux/list.h>
#include <linux/log2.h>
#include <linux/minmax.h>
#include <linux/percpu.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/types.h>
#include <linux/wait.h>
struct seq_file;

19
include/linux/seq_file.h
View File

@ -4,6 +4,7 @@
#include <linux/types.h>
#include <linux/string.h>
#include <linux/string_helpers.h>
#include <linux/bug.h>
#include <linux/mutex.h>
#include <linux/cpumask.h>
@ -135,7 +136,21 @@ static inline void seq_escape_str(struct seq_file *m, const char *src,
seq_escape_mem(m, src, strlen(src), flags, esc);
}
void seq_escape(struct seq_file *m, const char *s, const char *esc);
/**
* seq_escape - print string into buffer, escaping some characters
* @m: target buffer
* @s: NULL-terminated string
* @esc: set of characters that need escaping
*
* Puts string into buffer, replacing each occurrence of character from
* @esc with usual octal escape.
*
* Use seq_has_overflowed() to check for errors.
*/
static inline void seq_escape(struct seq_file *m, const char *s, const char *esc)
{
seq_escape_str(m, s, ESCAPE_OCTAL, esc);
}
void seq_hex_dump(struct seq_file *m, const char *prefix_str, int prefix_type,
int rowsize, int groupsize, const void *buf, size_t len,
@ -194,7 +209,7 @@ static const struct file_operations __name ## _fops = { \
#define DEFINE_PROC_SHOW_ATTRIBUTE(__name) \
static int __name ## _open(struct inode *inode, struct file *file) \
{ \
return single_open(file, __name ## _show, inode->i_private); \
return single_open(file, __name ## _show, PDE_DATA(inode)); \
} \
\
static const struct proc_ops __name ## _proc_ops = { \

1
include/linux/signal.h
View File

@ -126,7 +126,6 @@ static inline int sigequalsets(const sigset_t *set1, const sigset_t *set2)
#define sigmask(sig) (1UL << ((sig) - 1))
#ifndef __HAVE_ARCH_SIG_SETOPS
#include <linux/string.h>
#define _SIG_SET_BINOP(name, op) \
static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \

1
include/linux/smp.h
View File

@ -108,7 +108,6 @@ static inline void on_each_cpu_cond(smp_cond_func_t cond_func,
#ifdef CONFIG_SMP
#include <linux/preempt.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/thread_info.h>
#include <asm/smp.h>

1
include/linux/spinlock.h
View File

@ -57,7 +57,6 @@
#include <linux/compiler.h>
#include <linux/irqflags.h>
#include <linux/thread_info.h>
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <linux/bottom_half.h>
#include <linux/lockdep.h>

5
include/linux/stackdepot.h
View File

@ -25,6 +25,11 @@ depot_stack_handle_t stack_depot_save(unsigned long *entries,
unsigned int stack_depot_fetch(depot_stack_handle_t handle,
unsigned long **entries);
int stack_depot_snprint(depot_stack_handle_t handle, char *buf, size_t size,
int spaces);
void stack_depot_print(depot_stack_handle_t stack);
#ifdef CONFIG_STACKDEPOT
int stack_depot_init(void);
#else

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