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authorChristoph Hellwig <hch@lst.de>2017-08-29 16:13:18 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2017-09-04 19:04:22 -0400
commit47c27bc46946dea543196a92061da14c6da9889e (patch)
tree905d286c9435e0c09ff93dc120ec9c8a11efee63 /mm/filemap.c
parentcc4a41fe5541a73019a864883297bd5043aa6d98 (diff)
fs: pass iocb to do_generic_file_read
And rename it to the more descriptive generic_file_buffered_read while at it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm/filemap.c')
-rw-r--r--mm/filemap.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 0b41c8cbeabc..b7c039669020 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1888,9 +1888,8 @@ static void shrink_readahead_size_eio(struct file *filp,
}
/**
- * do_generic_file_read - generic file read routine
- * @filp: the file to read
- * @ppos: current file position
+ * generic_file_buffered_read - generic file read routine
+ * @iocb: the iocb to read
* @iter: data destination
* @written: already copied
*
@@ -1900,12 +1899,14 @@ static void shrink_readahead_size_eio(struct file *filp,
* This is really ugly. But the goto's actually try to clarify some
* of the logic when it comes to error handling etc.
*/
-static ssize_t do_generic_file_read(struct file *filp, loff_t *ppos,
+static ssize_t generic_file_buffered_read(struct kiocb *iocb,
struct iov_iter *iter, ssize_t written)
{
+ struct file *filp = iocb->ki_filp;
struct address_space *mapping = filp->f_mapping;
struct inode *inode = mapping->host;
struct file_ra_state *ra = &filp->f_ra;
+ loff_t *ppos = &iocb->ki_pos;
pgoff_t index;
pgoff_t last_index;
pgoff_t prev_index;
@@ -2153,14 +2154,14 @@ out:
ssize_t
generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
{
- struct file *file = iocb->ki_filp;
- ssize_t retval = 0;
size_t count = iov_iter_count(iter);
+ ssize_t retval = 0;
if (!count)
goto out; /* skip atime */
if (iocb->ki_flags & IOCB_DIRECT) {
+ struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
struct inode *inode = mapping->host;
loff_t size;
@@ -2201,7 +2202,7 @@ generic_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
goto out;
}
- retval = do_generic_file_read(file, &iocb->ki_pos, iter, retval);
+ retval = generic_file_buffered_read(iocb, iter, retval);
out:
return retval;
}