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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
111 lines
2.9 KiB
C
111 lines
2.9 KiB
C
/*
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* zpool memory storage api
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*
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* Copyright (C) 2014 Dan Streetman
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*
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* This is a common frontend for the zbud and zsmalloc memory
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* storage pool implementations. Typically, this is used to
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* store compressed memory.
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*/
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#ifndef _ZPOOL_H_
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#define _ZPOOL_H_
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struct zpool;
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struct zpool_ops {
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int (*evict)(struct zpool *pool, unsigned long handle);
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};
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/*
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* Control how a handle is mapped. It will be ignored if the
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* implementation does not support it. Its use is optional.
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* Note that this does not refer to memory protection, it
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* refers to how the memory will be copied in/out if copying
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* is necessary during mapping; read-write is the safest as
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* it copies the existing memory in on map, and copies the
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* changed memory back out on unmap. Write-only does not copy
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* in the memory and should only be used for initialization.
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* If in doubt, use ZPOOL_MM_DEFAULT which is read-write.
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*/
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enum zpool_mapmode {
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ZPOOL_MM_RW, /* normal read-write mapping */
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ZPOOL_MM_RO, /* read-only (no copy-out at unmap time) */
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ZPOOL_MM_WO, /* write-only (no copy-in at map time) */
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ZPOOL_MM_DEFAULT = ZPOOL_MM_RW
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};
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bool zpool_has_pool(char *type);
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struct zpool *zpool_create_pool(const char *type, const char *name,
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gfp_t gfp, const struct zpool_ops *ops);
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const char *zpool_get_type(struct zpool *pool);
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void zpool_destroy_pool(struct zpool *pool);
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int zpool_malloc(struct zpool *pool, size_t size, gfp_t gfp,
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unsigned long *handle);
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void zpool_free(struct zpool *pool, unsigned long handle);
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int zpool_shrink(struct zpool *pool, unsigned int pages,
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unsigned int *reclaimed);
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void *zpool_map_handle(struct zpool *pool, unsigned long handle,
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enum zpool_mapmode mm);
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void zpool_unmap_handle(struct zpool *pool, unsigned long handle);
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u64 zpool_get_total_size(struct zpool *pool);
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/**
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* struct zpool_driver - driver implementation for zpool
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* @type: name of the driver.
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* @list: entry in the list of zpool drivers.
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* @create: create a new pool.
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* @destroy: destroy a pool.
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* @malloc: allocate mem from a pool.
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* @free: free mem from a pool.
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* @shrink: shrink the pool.
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* @map: map a handle.
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* @unmap: unmap a handle.
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* @total_size: get total size of a pool.
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*
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* This is created by a zpool implementation and registered
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* with zpool.
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*/
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struct zpool_driver {
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char *type;
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struct module *owner;
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atomic_t refcount;
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struct list_head list;
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void *(*create)(const char *name,
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gfp_t gfp,
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const struct zpool_ops *ops,
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struct zpool *zpool);
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void (*destroy)(void *pool);
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int (*malloc)(void *pool, size_t size, gfp_t gfp,
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unsigned long *handle);
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void (*free)(void *pool, unsigned long handle);
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int (*shrink)(void *pool, unsigned int pages,
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unsigned int *reclaimed);
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void *(*map)(void *pool, unsigned long handle,
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enum zpool_mapmode mm);
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void (*unmap)(void *pool, unsigned long handle);
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u64 (*total_size)(void *pool);
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};
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void zpool_register_driver(struct zpool_driver *driver);
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int zpool_unregister_driver(struct zpool_driver *driver);
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#endif
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