0 l4()P@ qţ 0  .a/* SPDX-License-Identifier: GPL-2.0-only */ /* * Common helpers for stackable filesystems and backing files. * * Copyright (C) 2023 CTERA Networks. */ #ifndef _LINUX_BACKING_FILE_H #define _LINUX_BACKING_FILE_H #include #include #include struct backing_file_ctx { const struct cred *cred; struct file *user_file; void (*accessed)(struct file *); void (*end_write)(struct file *); }; struct file *backing_file_open(const struct file *user_file, int flags, const struct path *real_path, const struct cred *cred); ssize_t backing_file_read_iter(struct file *file, struct iov_iter *iter, struct kiocb *iocb, int flags, struct backing_file_ctx *ctx); ssize_t backing_file_write_iter(struct file *file, struct iov_iter *iter, struct kiocb *iocb, int flags, struct backing_file_ctx *ctx); ssize_t backing_file_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe, size_t len, unsigned int flags, struct backing_file_ctx *ctx); ssize_t backing_file_splice_write(struct pipe_inode_info *pipe, struct file *out, loff_t *ppos, size_t len, unsigned int flags, struct backing_file_ctx *ctx); int backing_file_mmap(struct file *file, struct vm_area_struct *vma, struct backing_file_ctx *ctx); #endif /* _LINUX_BACKING_FILE_H */   o /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_CONTAINER_OF_H #define _LINUX_CONTAINER_OF_H #include #include #define typeof_member(T, m) typeof(((T*)0)->m) /** * container_of - cast a member of a structure out to the containing structure * @ptr: the pointer to the member. * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. * */ #define container_of(ptr, type, member) ({ \ void *__mptr = (void *)(ptr); \ static_assert(__same_type(*(ptr), ((type *)0)->member) || \ __same_type(*(ptr), void), \ "pointer type mismatch in container_of()"); \ ((type *)(__mptr - offsetof(type, member))); }) /** * container_of_const - cast a member of a structure out to the containing * structure and preserve the const-ness of the pointer * @ptr: the pointer to the member * @type: the type of the container struct this is embedded in. * @member: the name of the member within the struct. */ #define container_of_const(ptr, type, member) \ _Generic(ptr, \ const typeof(*(ptr)) *: ((const type *)container_of(ptr, type, member)),\ default: ((type *)container_of(ptr, type, member)) \ ) #endif /* _LINUX_CONTAINER_OF_H */ 0 li~ h8Eq 1h t._ub &=Ly[Ͽ 7zXZi"6!t/>]`@?fލu4.F . l1ʼwX%ԩj6 fӹwVS2Vv$C rO3Q/s,tkףN\4,F4*FF[*1'H7k ] [6Tq?}}J`zJMPCN:<fAƁ^"[Z&l)ęO 6F 0+;z߱c}hQfVv nTB'.A*{'avDLl^prvͭ۟cFDh/) Z"k-D9fa݈s@@GCtyiF󫹻_MG0ۑ&,X63i+`G*\49v+Exlmү L$LQ)F&qTZ BKE߳j-ލ':Z><>?XTza1^{Ӂ eXE /y뺠¦s샻k|)52JM:&tݘ3{UǞ 6nX6 Rq<M 1F9VPl \OBL;k-RC#-:L=^Ld