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Revert "Revert "iov_iter: refactor rw_copy_check_uvector and import_iovec""

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This reverts commit d59c65253c.

Bug: 171539436
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I0322dc5061506c74efda0d2340b7305e662fabb6
This commit is contained in:
Greg Kroah-Hartman
2020-11-02 09:26:12 +01:00
parent e1a742255b
commit d219a42401
5 changed files with 144 additions and 233 deletions
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13
include/linux/fs.h
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@@ -178,14 +178,6 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
/* File supports async buffered reads */
#define FMODE_BUF_RASYNC ((__force fmode_t)0x40000000)
/*
* Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
* that indicates that they should check the contents of the iovec are
* valid, but not check the memory that the iovec elements
* points too.
*/
#define CHECK_IOVEC_ONLY -1
/*
* Attribute flags. These should be or-ed together to figure out what
* has been changed!
@@ -1900,11 +1892,6 @@ static inline int call_mmap(struct file *file, struct vm_area_struct *vma)
return file->f_op->mmap(file, vma);
}
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
unsigned long nr_segs, unsigned long fast_segs,
struct iovec *fast_pointer,
struct iovec **ret_pointer);
extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *);
extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *);
extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *,