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fs: export generic_file_buffered_read()

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Export generic_file_buffered_read() to be used to supplement incomplete
direct reads.

Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Zlatan Radovanovic <zlatan.radovanovic@fet.ba>
Change-Id: I5577fca5f9a836348d71999839f5de47e72caf98
Signed-off-by: Naveen <133593113+elohim-etz@users.noreply.github.com>
This commit is contained in:
Goldwyn Rodrigues
2019-08-30 12:09:24 -05:00
committed by Ansh
parent 521d224afa
commit 6454054b9d
2 changed files with 4 additions and 1 deletions
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2
include/linux/fs.h
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@@ -2978,6 +2978,8 @@ extern int sb_min_blocksize(struct super_block *, int);
extern int generic_file_mmap(struct file *, struct vm_area_struct *); extern int generic_file_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *); extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
extern ssize_t generic_write_checks(struct kiocb *, struct iov_iter *); extern ssize_t generic_write_checks(struct kiocb *, struct iov_iter *);
extern ssize_t generic_file_buffered_read(struct kiocb *iocb,
struct iov_iter *to, ssize_t already_read);
extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *); extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *); extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *); extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);

3
mm/filemap.c
View File

@@ -1996,7 +1996,7 @@ static void shrink_readahead_size_eio(struct file *filp,
* This is really ugly. But the goto's actually try to clarify some * This is really ugly. But the goto's actually try to clarify some
* of the logic when it comes to error handling etc. * of the logic when it comes to error handling etc.
*/ */
static ssize_t generic_file_buffered_read(struct kiocb *iocb, ssize_t generic_file_buffered_read(struct kiocb *iocb,
struct iov_iter *iter, ssize_t written) struct iov_iter *iter, ssize_t written)
{ {
struct file *filp = iocb->ki_filp; struct file *filp = iocb->ki_filp;
@@ -2248,6 +2248,7 @@ out:
file_accessed(filp); file_accessed(filp);
return written ? written : error; return written ? written : error;
} }
EXPORT_SYMBOL_GPL(generic_file_buffered_read);
/** /**
* generic_file_read_iter - generic filesystem read routine * generic_file_read_iter - generic filesystem read routine