void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov,unsigned long nr_segs, size_t count); 然后与用户空间移动数据: size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i); size_t _copy_from_iter(void *addr, size_t bytes, str...
iov_iter函数的原型如下: ```c ssize_t iov_iter_rw(struct iov_iter *i, unsigned int op, struct kiocb *kiocb, struct iov_iter *to, loff_t *ppos); ``` 其中,iov_iter表示一个迭代器,用于迭代数据的读写;op表示操作类型,可以是READ(读操作)或WRITE(写操作);kiocb是一个用于异步IO的控制块;to...
1.iov_iter的定义 iov_iter结构体通常定义为: c复制代码 struct iov_iter { int type; /* Type of iter */ size_t pos; /* Offset to current iter */ size_t count; /* Count of bytes not yet iterated */ size_t nbytes; /* Total number of bytes in the iter */ union { struct { vo...
@@ -2248,7 +2248,7 @@ static ssize_t qib_write_iter(struct kiocb *iocb, struct iov_iter *from) if (!iter_is_iovec(from) || !from->nr_segs || !pq) return -EINVAL; return qib_user_sdma_writev(rcd, pq, from->iov, from->nr_segs); return qib_user_sdma_writev(rcd, pq, it...
struct iov_iter { @@ -39,6 +41,7 @@ struct iov_iter { const struct iovec *iov; const struct kvec *kvec; const struct bio_vec *bvec; struct xarray *xarray; struct pipe_inode_info *pipe; }; union { @@ -47,6 +50,7 @@ struct iov_iter { unsigned int head; unsigned int star...
iov_iter本质是一个iovec的迭代器，与用户空间的iovec结构相同，并与系统调用如readv()协同工作。iovec数组形式体现了其“vec”特征，用于处理多个数据块。iov_iter的属性与用法 iovec结构包括type、iov_offset、count等字段。type描述迭代器的操作类型，是read或write的位掩码；iov_offset表示数组中的位置；...
struct iov_iter *i); +int copy_struct_from_iter(void *dst, size_t ksize, struct iov_iter *i); size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i); size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i); ...
函数名称:iov_iter_get_pages 函数原型:ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages, size_t maxsize, unsigned maxpages, size_t *start) 返回类型:ssize_t 参数: 类型参数名称 struct iov_iter * i struct page ** pages size_t maxsize unsigned maxpages size_t ...
> > + * > > + * if (usize > PAGE_SIZE) > > + * return -E2BIG; > > Maybe this should be more than a recommendation, and just be inside > copy_struct_from_iter(), because otherwise the "check_zeroed_user()" > call might be quite the timesink for somebody who does something...
LU-17386 BUG: KASAN: stack-out-of-bounds in iov_iter_advance LU-17777runtests test_1: FAIL: old and new files are different: rc=22 LU-18429failover node nid switches to loopback 0@lo on imports LU-18052osc checksums caused an client evictions during recovery LU-18147client page cache...