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Commit 0471ca3f authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: make cifs_readdata_alloc take a work_func_t arg 



We'll need different completion routines for an uncached read. Allow
the caller to set the one he needs at allocation time. Also, move
most of these functions to file.c so we can make more of them static.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
parent 0e93b4b3

fs/cifs/cifsproto.h

+0 −2
Original line number Diff line number Diff line
@@ -476,8 +476,6 @@ struct cifs_readdata { 
	struct kvec			iov[1];

};



struct cifs_readdata *cifs_readdata_alloc(unsigned int nr_pages);

void cifs_readdata_free(struct cifs_readdata *rdata);

int cifs_async_readv(struct cifs_readdata *rdata);



/* asynchronous write support */

fs/cifs/cifssmb.c

+0 −50
Original line number Diff line number Diff line
@@ -87,7 +87,6 @@ static struct { 
#endif /* CIFS_POSIX */



/* Forward declarations */

static void cifs_readv_complete(struct work_struct *work);



/* Mark as invalid, all open files on tree connections since they

   were closed when session to server was lost */
@@ -1385,28 +1384,6 @@ CIFSSMBOpen(const int xid, struct cifs_tcon *tcon, 
	return rc;

}



struct cifs_readdata *

cifs_readdata_alloc(unsigned int nr_pages)

{

	struct cifs_readdata *rdata;



	/* readdata + 1 kvec for each page */

	rdata = kzalloc(sizeof(*rdata) +

			sizeof(struct kvec) * nr_pages, GFP_KERNEL);

	if (rdata != NULL) {

		INIT_WORK(&rdata->work, cifs_readv_complete);

		INIT_LIST_HEAD(&rdata->pages);

	}

	return rdata;

}



void

cifs_readdata_free(struct cifs_readdata *rdata)

{

	cifsFileInfo_put(rdata->cfile);

	kfree(rdata);

}



/*

 * Discard any remaining data in the current SMB. To do this, we borrow the

 * current bigbuf.
@@ -1631,33 +1608,6 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid) 
	return length;

}



static void

cifs_readv_complete(struct work_struct *work)

{

	struct cifs_readdata *rdata = container_of(work,

						struct cifs_readdata, work);

	struct page *page, *tpage;



	list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {

		list_del(&page->lru);

		lru_cache_add_file(page);



		if (rdata->result == 0) {

			kunmap(page);

			flush_dcache_page(page);

			SetPageUptodate(page);

		}



		unlock_page(page);



		if (rdata->result == 0)

			cifs_readpage_to_fscache(rdata->mapping->host, page);



		page_cache_release(page);

	}

	cifs_readdata_free(rdata);

}



static void

cifs_readv_callback(struct mid_q_entry *mid)

{

fs/cifs/file.c

+49 −1
Original line number Diff line number Diff line
@@ -2339,6 +2339,27 @@ ssize_t cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, 
	return cifs_user_writev(iocb, iov, nr_segs, pos);

}



static struct cifs_readdata *

cifs_readdata_alloc(unsigned int nr_vecs, work_func_t complete)

{

	struct cifs_readdata *rdata;



	rdata = kzalloc(sizeof(*rdata) +

			sizeof(struct kvec) * nr_vecs, GFP_KERNEL);

	if (rdata != NULL) {

		INIT_WORK(&rdata->work, complete);

		INIT_LIST_HEAD(&rdata->pages);

	}

	return rdata;

}



static void

cifs_readdata_free(struct cifs_readdata *rdata)

{

	cifsFileInfo_put(rdata->cfile);

	kfree(rdata);

}



static ssize_t

cifs_iovec_read(struct file *file, const struct iovec *iov,

		 unsigned long nr_segs, loff_t *poffset)
@@ -2606,6 +2627,33 @@ int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) 
	return rc;

}



static void

cifs_readv_complete(struct work_struct *work)

{

	struct cifs_readdata *rdata = container_of(work,

						struct cifs_readdata, work);

	struct page *page, *tpage;



	list_for_each_entry_safe(page, tpage, &rdata->pages, lru) {

		list_del(&page->lru);

		lru_cache_add_file(page);



		if (rdata->result == 0) {

			kunmap(page);

			flush_dcache_page(page);

			SetPageUptodate(page);

		}



		unlock_page(page);



		if (rdata->result == 0)

			cifs_readpage_to_fscache(rdata->mapping->host, page);



		page_cache_release(page);

	}

	cifs_readdata_free(rdata);

}



static int cifs_readpages(struct file *file, struct address_space *mapping,

	struct list_head *page_list, unsigned num_pages)

{
@@ -2708,7 +2756,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, 
			nr_pages++;

		}



		rdata = cifs_readdata_alloc(nr_pages);

		rdata = cifs_readdata_alloc(nr_pages, cifs_readv_complete);

		if (!rdata) {

			/* best to give up if we're out of mem */

			list_for_each_entry_safe(page, tpage, &tmplist, lru) {