26 lines
847 B
C
Executable File
26 lines
847 B
C
Executable File
#ifndef ZC_H
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# define ZC_H
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/* For zero copy */
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int __get_userbuf(uint8_t __user *addr, uint32_t len, int write,
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unsigned int pgcount, struct page **pg, struct scatterlist *sg,
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struct task_struct *task, struct mm_struct *mm);
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void release_user_pages(struct csession *ses);
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int get_userbuf(struct csession *ses,
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void *__user src, unsigned int src_len,
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void *__user dst, unsigned int dst_len,
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struct task_struct *task, struct mm_struct *mm,
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struct scatterlist **src_sg,
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struct scatterlist **dst_sg);
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/* buflen ? (last page - first page + 1) : 0 */
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#define PAGECOUNT(buf, buflen) ((buflen) \
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? ((((unsigned long)(buf + buflen - 1)) >> PAGE_SHIFT) - \
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(((unsigned long)(buf )) >> PAGE_SHIFT) + 1) \
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: 0)
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#define DEFAULT_PREALLOC_PAGES 32
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#endif
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