mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
571
include/linux/swap.h
Normal file
571
include/linux/swap.h
Normal file
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@ -0,0 +1,571 @@
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#ifndef _LINUX_SWAP_H
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#define _LINUX_SWAP_H
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#include <linux/spinlock.h>
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#include <linux/linkage.h>
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#include <linux/mmzone.h>
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#include <linux/list.h>
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#include <linux/memcontrol.h>
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#include <linux/sched.h>
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#include <linux/node.h>
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#include <linux/fs.h>
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#include <linux/atomic.h>
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#include <linux/page-flags.h>
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#include <asm/page.h>
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struct notifier_block;
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struct bio;
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#define SWAP_FLAG_PREFER 0x8000 /* set if swap priority specified */
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#define SWAP_FLAG_PRIO_MASK 0x7fff
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#define SWAP_FLAG_PRIO_SHIFT 0
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#define SWAP_FLAG_DISCARD 0x10000 /* enable discard for swap */
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#define SWAP_FLAG_DISCARD_ONCE 0x20000 /* discard swap area at swapon-time */
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#define SWAP_FLAG_DISCARD_PAGES 0x40000 /* discard page-clusters after use */
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#define SWAP_FLAGS_VALID (SWAP_FLAG_PRIO_MASK | SWAP_FLAG_PREFER | \
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SWAP_FLAG_DISCARD | SWAP_FLAG_DISCARD_ONCE | \
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SWAP_FLAG_DISCARD_PAGES)
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static inline int current_is_kswapd(void)
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{
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return current->flags & PF_KSWAPD;
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}
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/*
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* MAX_SWAPFILES defines the maximum number of swaptypes: things which can
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* be swapped to. The swap type and the offset into that swap type are
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* encoded into pte's and into pgoff_t's in the swapcache. Using five bits
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* for the type means that the maximum number of swapcache pages is 27 bits
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* on 32-bit-pgoff_t architectures. And that assumes that the architecture packs
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* the type/offset into the pte as 5/27 as well.
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*/
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#define MAX_SWAPFILES_SHIFT 5
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/*
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* Use some of the swap files numbers for other purposes. This
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* is a convenient way to hook into the VM to trigger special
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* actions on faults.
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*/
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/*
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* NUMA node memory migration support
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*/
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#ifdef CONFIG_MIGRATION
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#define SWP_MIGRATION_NUM 2
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#define SWP_MIGRATION_READ (MAX_SWAPFILES + SWP_HWPOISON_NUM)
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#define SWP_MIGRATION_WRITE (MAX_SWAPFILES + SWP_HWPOISON_NUM + 1)
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#else
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#define SWP_MIGRATION_NUM 0
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#endif
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/*
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* Handling of hardware poisoned pages with memory corruption.
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*/
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#ifdef CONFIG_MEMORY_FAILURE
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#define SWP_HWPOISON_NUM 1
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#define SWP_HWPOISON MAX_SWAPFILES
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#else
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#define SWP_HWPOISON_NUM 0
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#endif
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#define MAX_SWAPFILES \
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((1 << MAX_SWAPFILES_SHIFT) - SWP_MIGRATION_NUM - SWP_HWPOISON_NUM)
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/*
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* Magic header for a swap area. The first part of the union is
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* what the swap magic looks like for the old (limited to 128MB)
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* swap area format, the second part of the union adds - in the
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* old reserved area - some extra information. Note that the first
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* kilobyte is reserved for boot loader or disk label stuff...
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*
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* Having the magic at the end of the PAGE_SIZE makes detecting swap
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* areas somewhat tricky on machines that support multiple page sizes.
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* For 2.5 we'll probably want to move the magic to just beyond the
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* bootbits...
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*/
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union swap_header {
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struct {
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char reserved[PAGE_SIZE - 10];
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char magic[10]; /* SWAP-SPACE or SWAPSPACE2 */
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} magic;
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struct {
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char bootbits[1024]; /* Space for disklabel etc. */
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__u32 version;
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__u32 last_page;
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__u32 nr_badpages;
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unsigned char sws_uuid[16];
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unsigned char sws_volume[16];
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__u32 padding[117];
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__u32 badpages[1];
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} info;
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};
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/* A swap entry has to fit into a "unsigned long", as
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* the entry is hidden in the "index" field of the
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* swapper address space.
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*/
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typedef struct {
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unsigned long val;
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} swp_entry_t;
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/*
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* current->reclaim_state points to one of these when a task is running
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* memory reclaim
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*/
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struct reclaim_state {
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unsigned long reclaimed_slab;
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};
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#ifdef __KERNEL__
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struct address_space;
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struct sysinfo;
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struct writeback_control;
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struct zone;
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/*
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* A swap extent maps a range of a swapfile's PAGE_SIZE pages onto a range of
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* disk blocks. A list of swap extents maps the entire swapfile. (Where the
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* term `swapfile' refers to either a blockdevice or an IS_REG file. Apart
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* from setup, they're handled identically.
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*
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* We always assume that blocks are of size PAGE_SIZE.
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*/
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struct swap_extent {
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struct list_head list;
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pgoff_t start_page;
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pgoff_t nr_pages;
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sector_t start_block;
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};
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/*
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* Max bad pages in the new format..
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*/
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#define __swapoffset(x) ((unsigned long)&((union swap_header *)0)->x)
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#define MAX_SWAP_BADPAGES \
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((__swapoffset(magic.magic) - __swapoffset(info.badpages)) / sizeof(int))
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enum {
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SWP_USED = (1 << 0), /* is slot in swap_info[] used? */
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SWP_WRITEOK = (1 << 1), /* ok to write to this swap? */
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SWP_DISCARDABLE = (1 << 2), /* blkdev support discard */
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SWP_DISCARDING = (1 << 3), /* now discarding a free cluster */
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SWP_SOLIDSTATE = (1 << 4), /* blkdev seeks are cheap */
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SWP_CONTINUED = (1 << 5), /* swap_map has count continuation */
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SWP_BLKDEV = (1 << 6), /* its a block device */
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SWP_FILE = (1 << 7), /* set after swap_activate success */
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SWP_AREA_DISCARD = (1 << 8), /* single-time swap area discards */
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SWP_PAGE_DISCARD = (1 << 9), /* freed swap page-cluster discards */
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/* add others here before... */
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SWP_SCANNING = (1 << 10), /* refcount in scan_swap_map */
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};
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#define SWAP_CLUSTER_MAX 32UL
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#define COMPACT_CLUSTER_MAX SWAP_CLUSTER_MAX
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/*
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* Ratio between zone->managed_pages and the "gap" that above the per-zone
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* "high_wmark". While balancing nodes, We allow kswapd to shrink zones that
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* do not meet the (high_wmark + gap) watermark, even which already met the
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* high_wmark, in order to provide better per-zone lru behavior. We are ok to
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* spend not more than 1% of the memory for this zone balancing "gap".
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*/
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#define KSWAPD_ZONE_BALANCE_GAP_RATIO 100
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#define SWAP_MAP_MAX 0x3e /* Max duplication count, in first swap_map */
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#define SWAP_MAP_BAD 0x3f /* Note pageblock is bad, in first swap_map */
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#define SWAP_HAS_CACHE 0x40 /* Flag page is cached, in first swap_map */
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#define SWAP_CONT_MAX 0x7f /* Max count, in each swap_map continuation */
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#define COUNT_CONTINUED 0x80 /* See swap_map continuation for full count */
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#define SWAP_MAP_SHMEM 0xbf /* Owned by shmem/tmpfs, in first swap_map */
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/*
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* We use this to track usage of a cluster. A cluster is a block of swap disk
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* space with SWAPFILE_CLUSTER pages long and naturally aligns in disk. All
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* free clusters are organized into a list. We fetch an entry from the list to
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* get a free cluster.
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*
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* The data field stores next cluster if the cluster is free or cluster usage
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* counter otherwise. The flags field determines if a cluster is free. This is
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* protected by swap_info_struct.lock.
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*/
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struct swap_cluster_info {
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unsigned int data:24;
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unsigned int flags:8;
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};
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#define CLUSTER_FLAG_FREE 1 /* This cluster is free */
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#define CLUSTER_FLAG_NEXT_NULL 2 /* This cluster has no next cluster */
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/*
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* We assign a cluster to each CPU, so each CPU can allocate swap entry from
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* its own cluster and swapout sequentially. The purpose is to optimize swapout
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* throughput.
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*/
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struct percpu_cluster {
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struct swap_cluster_info index; /* Current cluster index */
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unsigned int next; /* Likely next allocation offset */
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};
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/*
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* The in-memory structure used to track swap areas.
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*/
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struct swap_info_struct {
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unsigned long flags; /* SWP_USED etc: see above */
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signed short prio; /* swap priority of this type */
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struct plist_node list; /* entry in swap_active_head */
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struct plist_node avail_list; /* entry in swap_avail_head */
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signed char type; /* strange name for an index */
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unsigned int max; /* extent of the swap_map */
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unsigned char *swap_map; /* vmalloc'ed array of usage counts */
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struct swap_cluster_info *cluster_info; /* cluster info. Only for SSD */
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struct swap_cluster_info free_cluster_head; /* free cluster list head */
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struct swap_cluster_info free_cluster_tail; /* free cluster list tail */
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unsigned int lowest_bit; /* index of first free in swap_map */
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unsigned int highest_bit; /* index of last free in swap_map */
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unsigned int pages; /* total of usable pages of swap */
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unsigned int inuse_pages; /* number of those currently in use */
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unsigned int cluster_next; /* likely index for next allocation */
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unsigned int cluster_nr; /* countdown to next cluster search */
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struct percpu_cluster __percpu *percpu_cluster; /* per cpu's swap location */
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struct swap_extent *curr_swap_extent;
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struct swap_extent first_swap_extent;
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struct block_device *bdev; /* swap device or bdev of swap file */
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struct file *swap_file; /* seldom referenced */
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unsigned int old_block_size; /* seldom referenced */
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#ifdef CONFIG_FRONTSWAP
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unsigned long *frontswap_map; /* frontswap in-use, one bit per page */
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atomic_t frontswap_pages; /* frontswap pages in-use counter */
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#endif
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spinlock_t lock; /*
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* protect map scan related fields like
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* swap_map, lowest_bit, highest_bit,
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* inuse_pages, cluster_next,
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* cluster_nr, lowest_alloc,
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* highest_alloc, free/discard cluster
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* list. other fields are only changed
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* at swapon/swapoff, so are protected
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* by swap_lock. changing flags need
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* hold this lock and swap_lock. If
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* both locks need hold, hold swap_lock
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* first.
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*/
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struct work_struct discard_work; /* discard worker */
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struct swap_cluster_info discard_cluster_head; /* list head of discard clusters */
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struct swap_cluster_info discard_cluster_tail; /* list tail of discard clusters */
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};
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/* linux/mm/workingset.c */
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void *workingset_eviction(struct address_space *mapping, struct page *page);
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bool workingset_refault(void *shadow);
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void workingset_activation(struct page *page);
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extern struct list_lru workingset_shadow_nodes;
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static inline unsigned int workingset_node_pages(struct radix_tree_node *node)
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{
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return node->count & RADIX_TREE_COUNT_MASK;
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}
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static inline void workingset_node_pages_inc(struct radix_tree_node *node)
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{
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node->count++;
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}
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static inline void workingset_node_pages_dec(struct radix_tree_node *node)
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{
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node->count--;
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}
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static inline unsigned int workingset_node_shadows(struct radix_tree_node *node)
|
||||
{
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return node->count >> RADIX_TREE_COUNT_SHIFT;
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}
|
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|
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static inline void workingset_node_shadows_inc(struct radix_tree_node *node)
|
||||
{
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node->count += 1U << RADIX_TREE_COUNT_SHIFT;
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||||
}
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|
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static inline void workingset_node_shadows_dec(struct radix_tree_node *node)
|
||||
{
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node->count -= 1U << RADIX_TREE_COUNT_SHIFT;
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}
|
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|
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/* linux/mm/page_alloc.c */
|
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extern unsigned long totalram_pages;
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extern unsigned long totalreserve_pages;
|
||||
extern unsigned long dirty_balance_reserve;
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extern unsigned long nr_free_buffer_pages(void);
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extern unsigned long nr_free_pagecache_pages(void);
|
||||
|
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/* Definition of global_page_state not available yet */
|
||||
#define nr_free_pages() global_page_state(NR_FREE_PAGES)
|
||||
|
||||
|
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/* linux/mm/swap.c */
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extern void lru_cache_add(struct page *);
|
||||
extern void lru_cache_add_anon(struct page *page);
|
||||
extern void lru_cache_add_file(struct page *page);
|
||||
extern void lru_add_page_tail(struct page *page, struct page *page_tail,
|
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struct lruvec *lruvec, struct list_head *head);
|
||||
extern void activate_page(struct page *);
|
||||
extern void mark_page_accessed(struct page *);
|
||||
extern void lru_add_drain(void);
|
||||
extern void lru_add_drain_cpu(int cpu);
|
||||
extern void lru_add_drain_all(void);
|
||||
extern void rotate_reclaimable_page(struct page *page);
|
||||
extern void deactivate_page(struct page *page);
|
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extern void swap_setup(void);
|
||||
|
||||
extern void add_page_to_unevictable_list(struct page *page);
|
||||
|
||||
extern void lru_cache_add_active_or_unevictable(struct page *page,
|
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struct vm_area_struct *vma);
|
||||
|
||||
/* linux/mm/vmscan.c */
|
||||
extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
|
||||
gfp_t gfp_mask, nodemask_t *mask);
|
||||
extern int __isolate_lru_page(struct page *page, isolate_mode_t mode);
|
||||
extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *memcg,
|
||||
unsigned long nr_pages,
|
||||
gfp_t gfp_mask,
|
||||
bool may_swap);
|
||||
extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
|
||||
gfp_t gfp_mask, bool noswap,
|
||||
struct zone *zone,
|
||||
unsigned long *nr_scanned);
|
||||
extern unsigned long shrink_all_memory(unsigned long nr_pages);
|
||||
extern int vm_swappiness;
|
||||
extern int remove_mapping(struct address_space *mapping, struct page *page);
|
||||
extern unsigned long vm_total_pages;
|
||||
|
||||
#ifdef CONFIG_NUMA
|
||||
extern int zone_reclaim_mode;
|
||||
extern int sysctl_min_unmapped_ratio;
|
||||
extern int sysctl_min_slab_ratio;
|
||||
extern int zone_reclaim(struct zone *, gfp_t, unsigned int);
|
||||
#else
|
||||
#define zone_reclaim_mode 0
|
||||
static inline int zone_reclaim(struct zone *z, gfp_t mask, unsigned int order)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
extern int page_evictable(struct page *page);
|
||||
extern void check_move_unevictable_pages(struct page **, int nr_pages);
|
||||
|
||||
extern int kswapd_run(int nid);
|
||||
extern void kswapd_stop(int nid);
|
||||
#ifdef CONFIG_MEMCG
|
||||
extern int mem_cgroup_swappiness(struct mem_cgroup *mem);
|
||||
#else
|
||||
static inline int mem_cgroup_swappiness(struct mem_cgroup *mem)
|
||||
{
|
||||
return vm_swappiness;
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_MEMCG_SWAP
|
||||
extern void mem_cgroup_swapout(struct page *page, swp_entry_t entry);
|
||||
extern void mem_cgroup_uncharge_swap(swp_entry_t entry);
|
||||
#else
|
||||
static inline void mem_cgroup_swapout(struct page *page, swp_entry_t entry)
|
||||
{
|
||||
}
|
||||
static inline void mem_cgroup_uncharge_swap(swp_entry_t entry)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_SWAP
|
||||
/* linux/mm/page_io.c */
|
||||
extern int swap_readpage(struct page *);
|
||||
extern int swap_writepage(struct page *page, struct writeback_control *wbc);
|
||||
extern void end_swap_bio_write(struct bio *bio, int err);
|
||||
extern int __swap_writepage(struct page *page, struct writeback_control *wbc,
|
||||
void (*end_write_func)(struct bio *, int));
|
||||
extern int swap_set_page_dirty(struct page *page);
|
||||
extern void end_swap_bio_read(struct bio *bio, int err);
|
||||
|
||||
int add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,
|
||||
unsigned long nr_pages, sector_t start_block);
|
||||
int generic_swapfile_activate(struct swap_info_struct *, struct file *,
|
||||
sector_t *);
|
||||
|
||||
/* linux/mm/swap_state.c */
|
||||
extern struct address_space swapper_spaces[];
|
||||
#define swap_address_space(entry) (&swapper_spaces[swp_type(entry)])
|
||||
extern unsigned long total_swapcache_pages(void);
|
||||
extern void show_swap_cache_info(void);
|
||||
extern int add_to_swap(struct page *, struct list_head *list);
|
||||
extern int add_to_swap_cache(struct page *, swp_entry_t, gfp_t);
|
||||
extern int __add_to_swap_cache(struct page *page, swp_entry_t entry);
|
||||
extern void __delete_from_swap_cache(struct page *);
|
||||
extern void delete_from_swap_cache(struct page *);
|
||||
extern void free_page_and_swap_cache(struct page *);
|
||||
extern void free_pages_and_swap_cache(struct page **, int);
|
||||
extern struct page *lookup_swap_cache(swp_entry_t);
|
||||
extern struct page *read_swap_cache_async(swp_entry_t, gfp_t,
|
||||
struct vm_area_struct *vma, unsigned long addr);
|
||||
extern struct page *swapin_readahead(swp_entry_t, gfp_t,
|
||||
struct vm_area_struct *vma, unsigned long addr);
|
||||
|
||||
/* linux/mm/swapfile.c */
|
||||
extern atomic_long_t nr_swap_pages;
|
||||
extern long total_swap_pages;
|
||||
|
||||
/* Swap 50% full? Release swapcache more aggressively.. */
|
||||
static inline bool vm_swap_full(void)
|
||||
{
|
||||
return atomic_long_read(&nr_swap_pages) * 2 < total_swap_pages;
|
||||
}
|
||||
|
||||
static inline long get_nr_swap_pages(void)
|
||||
{
|
||||
return atomic_long_read(&nr_swap_pages);
|
||||
}
|
||||
|
||||
extern void si_swapinfo(struct sysinfo *);
|
||||
extern swp_entry_t get_swap_page(void);
|
||||
extern swp_entry_t get_swap_page_of_type(int);
|
||||
extern int add_swap_count_continuation(swp_entry_t, gfp_t);
|
||||
extern void swap_shmem_alloc(swp_entry_t);
|
||||
extern int swap_duplicate(swp_entry_t);
|
||||
extern int swapcache_prepare(swp_entry_t);
|
||||
extern void swap_free(swp_entry_t);
|
||||
extern void swapcache_free(swp_entry_t);
|
||||
extern int free_swap_and_cache(swp_entry_t);
|
||||
extern int swap_type_of(dev_t, sector_t, struct block_device **);
|
||||
extern unsigned int count_swap_pages(int, int);
|
||||
extern sector_t map_swap_page(struct page *, struct block_device **);
|
||||
extern sector_t swapdev_block(int, pgoff_t);
|
||||
extern int page_swapcount(struct page *);
|
||||
extern int swp_swapcount(swp_entry_t entry);
|
||||
extern struct swap_info_struct *page_swap_info(struct page *);
|
||||
extern int reuse_swap_page(struct page *);
|
||||
extern int try_to_free_swap(struct page *);
|
||||
struct backing_dev_info;
|
||||
|
||||
#ifdef CONFIG_MEMCG
|
||||
extern void
|
||||
mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout);
|
||||
#else
|
||||
static inline void
|
||||
mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
#else /* CONFIG_SWAP */
|
||||
|
||||
#define swap_address_space(entry) (NULL)
|
||||
#define get_nr_swap_pages() 0L
|
||||
#define total_swap_pages 0L
|
||||
#define total_swapcache_pages() 0UL
|
||||
#define vm_swap_full() 0
|
||||
|
||||
#define si_swapinfo(val) \
|
||||
do { (val)->freeswap = (val)->totalswap = 0; } while (0)
|
||||
/* only sparc can not include linux/pagemap.h in this file
|
||||
* so leave page_cache_release and release_pages undeclared... */
|
||||
#define free_page_and_swap_cache(page) \
|
||||
page_cache_release(page)
|
||||
#define free_pages_and_swap_cache(pages, nr) \
|
||||
release_pages((pages), (nr), false);
|
||||
|
||||
static inline void show_swap_cache_info(void)
|
||||
{
|
||||
}
|
||||
|
||||
#define free_swap_and_cache(swp) is_migration_entry(swp)
|
||||
#define swapcache_prepare(swp) is_migration_entry(swp)
|
||||
|
||||
static inline int add_swap_count_continuation(swp_entry_t swp, gfp_t gfp_mask)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void swap_shmem_alloc(swp_entry_t swp)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int swap_duplicate(swp_entry_t swp)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline void swap_free(swp_entry_t swp)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void swapcache_free(swp_entry_t swp)
|
||||
{
|
||||
}
|
||||
|
||||
static inline struct page *swapin_readahead(swp_entry_t swp, gfp_t gfp_mask,
|
||||
struct vm_area_struct *vma, unsigned long addr)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int swap_writepage(struct page *p, struct writeback_control *wbc)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline struct page *lookup_swap_cache(swp_entry_t swp)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline int add_to_swap(struct page *page, struct list_head *list)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int add_to_swap_cache(struct page *page, swp_entry_t entry,
|
||||
gfp_t gfp_mask)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline void __delete_from_swap_cache(struct page *page)
|
||||
{
|
||||
}
|
||||
|
||||
static inline void delete_from_swap_cache(struct page *page)
|
||||
{
|
||||
}
|
||||
|
||||
static inline int page_swapcount(struct page *page)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int swp_swapcount(swp_entry_t entry)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define reuse_swap_page(page) (page_mapcount(page) == 1)
|
||||
|
||||
static inline int try_to_free_swap(struct page *page)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline swp_entry_t get_swap_page(void)
|
||||
{
|
||||
swp_entry_t entry;
|
||||
entry.val = 0;
|
||||
return entry;
|
||||
}
|
||||
|
||||
static inline void
|
||||
mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent)
|
||||
{
|
||||
}
|
||||
|
||||
#endif /* CONFIG_SWAP */
|
||||
#endif /* __KERNEL__*/
|
||||
#endif /* _LINUX_SWAP_H */
|
||||
Loading…
Add table
Add a link
Reference in a new issue