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36cdb4f782
Add internal flags for struct io_mapped_region. The first flag we need is IO_REGION_F_VMAPPED, that indicates that the pointer has to be unmapped on region destruction. For now all regions are vmap'ed, so it's set unconditionally. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/5a3d8046a038da97c0f8a8c8f1733fa3fc689d31.1732886067.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
#ifndef IO_URING_MEMMAP_H
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#define IO_URING_MEMMAP_H
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struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages);
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void io_pages_free(struct page ***pages, int npages);
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int io_uring_mmap_pages(struct io_ring_ctx *ctx, struct vm_area_struct *vma,
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struct page **pages, int npages);
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void *io_pages_map(struct page ***out_pages, unsigned short *npages,
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size_t size);
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void io_pages_unmap(void *ptr, struct page ***pages, unsigned short *npages,
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bool put_pages);
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void *__io_uaddr_map(struct page ***pages, unsigned short *npages,
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unsigned long uaddr, size_t size);
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#ifndef CONFIG_MMU
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unsigned int io_uring_nommu_mmap_capabilities(struct file *file);
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#endif
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unsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr,
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unsigned long len, unsigned long pgoff,
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unsigned long flags);
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int io_uring_mmap(struct file *file, struct vm_area_struct *vma);
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void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr);
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int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr,
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struct io_uring_region_desc *reg);
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static inline void *io_region_get_ptr(struct io_mapped_region *mr)
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{
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return mr->ptr;
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}
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static inline bool io_region_is_set(struct io_mapped_region *mr)
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{
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return !!mr->nr_pages;
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}
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#endif
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