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Commit b8a78bb4 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client 

Pull ceph fix from Ilya Dryomov:
 "ceph fscache page locking fix from Zheng, marked for stable"

* tag 'ceph-for-4.13-rc8' of git://github.com/ceph/ceph-client:
  ceph: fix readpage from fscache
parents 3e1d79c8 dd2bc473

fs/ceph/addr.c

+15 −9
Original line number Diff line number Diff line
@@ -189,7 +189,7 @@ static int ceph_releasepage(struct page *page, gfp_t g) 
/*

 * read a single page, without unlocking it.

 */

static int readpage_nounlock(struct file *filp, struct page *page)

static int ceph_do_readpage(struct file *filp, struct page *page)

{

	struct inode *inode = file_inode(filp);

	struct ceph_inode_info *ci = ceph_inode(inode);
@@ -219,7 +219,7 @@ static int readpage_nounlock(struct file *filp, struct page *page) 


	err = ceph_readpage_from_fscache(inode, page);

	if (err == 0)

		goto out;

		return -EINPROGRESS;



	dout("readpage inode %p file %p page %p index %lu\n",

	     inode, filp, page, page->index);
@@ -249,8 +249,11 @@ static int readpage_nounlock(struct file *filp, struct page *page) 


static int ceph_readpage(struct file *filp, struct page *page)

{

	int r = readpage_nounlock(filp, page);

	int r = ceph_do_readpage(filp, page);

	if (r != -EINPROGRESS)

		unlock_page(page);

	else

		r = 0;

	return r;

}
@@ -1237,7 +1240,7 @@ static int ceph_update_writeable_page(struct file *file, 
			goto retry_locked;

		r = writepage_nounlock(page, NULL);

		if (r < 0)

			goto fail_nosnap;

			goto fail_unlock;

		goto retry_locked;

	}
@@ -1265,11 +1268,14 @@ static int ceph_update_writeable_page(struct file *file, 
	}



	/* we need to read it. */

	r = readpage_nounlock(file, page);

	if (r < 0)

		goto fail_nosnap;

	r = ceph_do_readpage(file, page);

	if (r < 0) {

		if (r == -EINPROGRESS)

			return -EAGAIN;

		goto fail_unlock;

	}

	goto retry_locked;

fail_nosnap:

fail_unlock:

	unlock_page(page);

	return r;

}

fs/ceph/cache.c

+3 −9
Original line number Diff line number Diff line
@@ -297,13 +297,7 @@ void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp) 
	}

}



static void ceph_vfs_readpage_complete(struct page *page, void *data, int error)

{

	if (!error)

		SetPageUptodate(page);

}



static void ceph_vfs_readpage_complete_unlock(struct page *page, void *data, int error)

static void ceph_readpage_from_fscache_complete(struct page *page, void *data, int error)

{

	if (!error)

		SetPageUptodate(page);
@@ -331,7 +325,7 @@ int ceph_readpage_from_fscache(struct inode *inode, struct page *page) 
		return -ENOBUFS;



	ret = fscache_read_or_alloc_page(ci->fscache, page,

					 ceph_vfs_readpage_complete, NULL,

					 ceph_readpage_from_fscache_complete, NULL,

					 GFP_KERNEL);



	switch (ret) {
@@ -360,7 +354,7 @@ int ceph_readpages_from_fscache(struct inode *inode, 
		return -ENOBUFS;



	ret = fscache_read_or_alloc_pages(ci->fscache, mapping, pages, nr_pages,

					  ceph_vfs_readpage_complete_unlock,

					  ceph_readpage_from_fscache_complete,

					  NULL, mapping_gfp_mask(mapping));



	switch (ret) {