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https://github.com/schoebel/mars
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77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
// (c) 2011 Thomas Schoebel-Theuer / 1&1 Internet AG
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#ifndef BRICK_MEM_H
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#define BRICK_MEM_H
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#include <linux/mm_types.h>
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#define GFP_BRICK GFP_NOIO
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//#define GFP_BRICK GFP_KERNEL // can lead to deadlocks!
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extern long long brick_global_memavail;
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extern long long brick_global_memlimit;
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extern atomic64_t brick_global_block_used;
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/////////////////////////////////////////////////////////////////////////
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// small memory allocation (use this only for len < PAGE_SIZE)
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#define brick_mem_alloc(_len_) _brick_mem_alloc(_len_, __LINE__)
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#define brick_zmem_alloc(_len_) ({ void *_res_ = _brick_mem_alloc(_len_, __LINE__); if (_res_) { memset(_res_, 0, _len_); } _res_; })
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extern void *_brick_mem_alloc(int len, int line);
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#define brick_mem_free(_data_) _brick_mem_free(_data_, __LINE__)
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extern void _brick_mem_free(void *data, int line);
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/////////////////////////////////////////////////////////////////////////
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// string memory allocation
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#define BRICK_STRING_LEN 1024 /* default value when len == 0 */
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#define brick_string_alloc(_len_) _brick_string_alloc(_len_, __LINE__)
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#define brick_strndup(_orig_,_len_) ({ char *_res_ = _brick_string_alloc((_len_) + 1, __LINE__); if (_res_) { strncpy(_res_, _orig_, (_len_)); _res_[_len_] = '\0';} _res_; })
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#define brick_strdup(_orig_) ({ int _len_ = strlen(_orig_); char *_res_ = _brick_string_alloc(_len_ + 1, __LINE__); if (_res_) { strncpy(_res_, _orig_, _len_ + 1); } _res_; })
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extern char *_brick_string_alloc(int len, int line);
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#define brick_string_free(_data_) _brick_string_free(_data_, __LINE__)
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extern void _brick_string_free(const char *data, int line);
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extern void brick_mem_statistics(void);
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/////////////////////////////////////////////////////////////////////////
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// block memory allocation (for aligned multiples of 512 resp PAGE_SIZE)
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#define brick_block_alloc(_pos_,_len_) _brick_block_alloc(_pos_, _len_, __LINE__)
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extern void *_brick_block_alloc(loff_t pos, int len, int line);
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extern void _brick_block_free(void *data, int len, int cline);
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#define brick_block_free(_data_,_len_) _brick_block_free(_data_, _len_, __LINE__)
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extern struct page *brick_iomap(void *data, int *offset, int *len);
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/////////////////////////////////////////////////////////////////////////
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// reservations / preallocation
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#define BRICK_MAX_ORDER 11
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extern bool brick_allow_freelist;
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struct mem_reservation {
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int amount[BRICK_MAX_ORDER+1];
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};
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extern int brick_mem_reserve(struct mem_reservation *r);
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/////////////////////////////////////////////////////////////////////////
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// init
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#ifdef CONFIG_MARS_HAVE_BIGMODULE
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#undef __exit
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#define __exit /*empty*/
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#endif
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extern int init_brick_mem(void);
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extern void exit_brick_mem(void);
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#endif
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