Commit d85dc2e1 authored by Goldwyn Rodrigues's avatar Goldwyn Rodrigues Committed by David Sterba
Browse files

fs: export generic_file_buffered_read() 



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

Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarGoldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent bbcd1f4d

include/linux/fs.h

+2 −0
Original line number Diff line number Diff line
@@ -3124,6 +3124,8 @@ extern int generic_file_rw_checks(struct file *file_in, struct file *file_out); 
extern int generic_copy_file_checks(struct file *file_in, loff_t pos_in,

				    struct file *file_out, loff_t pos_out,

				    size_t *count, unsigned int flags);

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_write_iter(struct kiocb *, struct iov_iter *);

extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);

mm/filemap.c

+2 −1
Original line number Diff line number Diff line
@@ -1991,7 +1991,7 @@ static void shrink_readahead_size_eio(struct file_ra_state *ra) 
 * * total number of bytes copied, including those the were already @written

 * * negative error code if nothing was copied

 */

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 file *filp = iocb->ki_filp;
@@ -2243,6 +2243,7 @@ out: 
	file_accessed(filp);

	return written ? written : error;

}

EXPORT_SYMBOL_GPL(generic_file_buffered_read);



/**

 * generic_file_read_iter - generic filesystem read routine

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