diff options
Diffstat (limited to 'io_uring/memmap.h')
| -rw-r--r-- | io_uring/memmap.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/io_uring/memmap.h b/io_uring/memmap.h index 08419684e4bc..a39d9e518905 100644 --- a/io_uring/memmap.h +++ b/io_uring/memmap.h @@ -16,16 +16,11 @@ unsigned long io_uring_get_unmapped_area(struct file *file, unsigned long addr, unsigned long flags); int io_uring_mmap(struct file *file, struct vm_area_struct *vma); -void io_free_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr); +void io_free_region(struct user_struct *user, struct io_mapped_region *mr); int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr, struct io_uring_region_desc *reg, unsigned long mmap_offset); -int io_create_region_mmap_safe(struct io_ring_ctx *ctx, - struct io_mapped_region *mr, - struct io_uring_region_desc *reg, - unsigned long mmap_offset); - static inline void *io_region_get_ptr(struct io_mapped_region *mr) { return mr->ptr; @@ -36,4 +31,21 @@ static inline bool io_region_is_set(struct io_mapped_region *mr) return !!mr->nr_pages; } +static inline void io_region_publish(struct io_ring_ctx *ctx, + struct io_mapped_region *src_region, + struct io_mapped_region *dst_region) +{ + /* + * Once published mmap can find it without holding only the ->mmap_lock + * and not ->uring_lock. + */ + guard(mutex)(&ctx->mmap_lock); + *dst_region = *src_region; +} + +static inline size_t io_region_size(struct io_mapped_region *mr) +{ + return (size_t) mr->nr_pages << PAGE_SHIFT; +} + #endif |