Commit 24499847 authored by Souptick Joarder's avatar Souptick Joarder Committed by Ilya Dryomov
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ceph: adding new return type vm_fault_t 



Use new return type vm_fault_t for page_mkwrite
and fault handler.

Signed-off-by: default avatarSouptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: default avatarMatthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent f7e52d8e

fs/ceph/addr.c

+32 −30
Original line number Diff line number Diff line
@@ -1429,7 +1429,7 @@ static void ceph_restore_sigs(sigset_t *oldset) 
/*

 * vm ops

 */

static int ceph_filemap_fault(struct vm_fault *vmf)

static vm_fault_t ceph_filemap_fault(struct vm_fault *vmf)

{

	struct vm_area_struct *vma = vmf->vma;

	struct inode *inode = file_inode(vma->vm_file);
@@ -1437,8 +1437,9 @@ static int ceph_filemap_fault(struct vm_fault *vmf) 
	struct ceph_file_info *fi = vma->vm_file->private_data;

	struct page *pinned_page = NULL;

	loff_t off = vmf->pgoff << PAGE_SHIFT;

	int want, got, ret;

	int want, got, err;

	sigset_t oldset;

	vm_fault_t ret = VM_FAULT_SIGBUS;



	ceph_block_sigs(&oldset);
@@ -1450,8 +1451,8 @@ static int ceph_filemap_fault(struct vm_fault *vmf) 
		want = CEPH_CAP_FILE_CACHE;



	got = 0;

	ret = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page);

	if (ret < 0)

	err = ceph_get_caps(ci, CEPH_CAP_FILE_RD, want, -1, &got, &pinned_page);

	if (err < 0)

		goto out_restore;



	dout("filemap_fault %p %llu~%zd got cap refs on %s\n",
@@ -1463,16 +1464,17 @@ static int ceph_filemap_fault(struct vm_fault *vmf) 
		ceph_add_rw_context(fi, &rw_ctx);

		ret = filemap_fault(vmf);

		ceph_del_rw_context(fi, &rw_ctx);

		dout("filemap_fault %p %llu~%zd drop cap refs %s ret %x\n",

			inode, off, (size_t)PAGE_SIZE,

				ceph_cap_string(got), ret);

	} else

		ret = -EAGAIN;

		err = -EAGAIN;



	dout("filemap_fault %p %llu~%zd dropping cap refs on %s ret %d\n",

	     inode, off, (size_t)PAGE_SIZE, ceph_cap_string(got), ret);

	if (pinned_page)

		put_page(pinned_page);

	ceph_put_cap_refs(ci, got);



	if (ret != -EAGAIN)

	if (err != -EAGAIN)

		goto out_restore;



	/* read inline data */
@@ -1480,7 +1482,6 @@ static int ceph_filemap_fault(struct vm_fault *vmf) 
		/* does not support inline data > PAGE_SIZE */

		ret = VM_FAULT_SIGBUS;

	} else {

		int ret1;

		struct address_space *mapping = inode->i_mapping;

		struct page *page = find_or_create_page(mapping, 0,

						mapping_gfp_constraint(mapping,
@@ -1489,32 +1490,32 @@ static int ceph_filemap_fault(struct vm_fault *vmf) 
			ret = VM_FAULT_OOM;

			goto out_inline;

		}

		ret1 = __ceph_do_getattr(inode, page,

		err = __ceph_do_getattr(inode, page,

					 CEPH_STAT_CAP_INLINE_DATA, true);

		if (ret1 < 0 || off >= i_size_read(inode)) {

		if (err < 0 || off >= i_size_read(inode)) {

			unlock_page(page);

			put_page(page);

			if (ret1 < 0)

				ret = ret1;

			if (err == -ENOMEM)

				ret = VM_FAULT_OOM;

			else

				ret = VM_FAULT_SIGBUS;

			goto out_inline;

		}

		if (ret1 < PAGE_SIZE)

			zero_user_segment(page, ret1, PAGE_SIZE);

		if (err < PAGE_SIZE)

			zero_user_segment(page, err, PAGE_SIZE);

		else

			flush_dcache_page(page);

		SetPageUptodate(page);

		vmf->page = page;

		ret = VM_FAULT_MAJOR | VM_FAULT_LOCKED;

out_inline:

		dout("filemap_fault %p %llu~%zd read inline data ret %d\n",

		dout("filemap_fault %p %llu~%zd read inline data ret %x\n",

		     inode, off, (size_t)PAGE_SIZE, ret);

	}

out_restore:

	ceph_restore_sigs(&oldset);

	if (ret < 0)

		ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;

	if (err < 0)

		ret = vmf_error(err);



	return ret;

}
@@ -1522,7 +1523,7 @@ out_restore: 
/*

 * Reuse write_begin here for simplicity.

 */

static int ceph_page_mkwrite(struct vm_fault *vmf)

static vm_fault_t ceph_page_mkwrite(struct vm_fault *vmf)

{

	struct vm_area_struct *vma = vmf->vma;

	struct inode *inode = file_inode(vma->vm_file);
@@ -1533,8 +1534,9 @@ static int ceph_page_mkwrite(struct vm_fault *vmf) 
	loff_t off = page_offset(page);

	loff_t size = i_size_read(inode);

	size_t len;

	int want, got, ret;

	int want, got, err;

	sigset_t oldset;

	vm_fault_t ret = VM_FAULT_SIGBUS;



	prealloc_cf = ceph_alloc_cap_flush();

	if (!prealloc_cf)
@@ -1548,10 +1550,10 @@ static int ceph_page_mkwrite(struct vm_fault *vmf) 
			lock_page(page);

			locked_page = page;

		}

		ret = ceph_uninline_data(vma->vm_file, locked_page);

		err = ceph_uninline_data(vma->vm_file, locked_page);

		if (locked_page)

			unlock_page(locked_page);

		if (ret < 0)

		if (err < 0)

			goto out_free;

	}
@@ -1568,9 +1570,9 @@ static int ceph_page_mkwrite(struct vm_fault *vmf) 
		want = CEPH_CAP_FILE_BUFFER;



	got = 0;

	ret = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len,

	err = ceph_get_caps(ci, CEPH_CAP_FILE_WR, want, off + len,

			    &got, NULL);

	if (ret < 0)

	if (err < 0)

		goto out_free;



	dout("page_mkwrite %p %llu~%zd got cap refs on %s\n",
@@ -1588,13 +1590,13 @@ static int ceph_page_mkwrite(struct vm_fault *vmf) 
			break;

		}



		ret = ceph_update_writeable_page(vma->vm_file, off, len, page);

		if (ret >= 0) {

		err = ceph_update_writeable_page(vma->vm_file, off, len, page);

		if (err >= 0) {

			/* success.  we'll keep the page locked. */

			set_page_dirty(page);

			ret = VM_FAULT_LOCKED;

		}

	} while (ret == -EAGAIN);

	} while (err == -EAGAIN);



	if (ret == VM_FAULT_LOCKED ||

	    ci->i_inline_version != CEPH_INLINE_NONE) {
@@ -1608,14 +1610,14 @@ static int ceph_page_mkwrite(struct vm_fault *vmf) 
			__mark_inode_dirty(inode, dirty);

	}



	dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %d\n",

	dout("page_mkwrite %p %llu~%zd dropping cap refs on %s ret %x\n",

	     inode, off, len, ceph_cap_string(got), ret);

	ceph_put_cap_refs(ci, got);

out_free:

	ceph_restore_sigs(&oldset);

	ceph_free_cap_flush(prealloc_cf);

	if (ret < 0)

		ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;

	if (err < 0)

		ret = vmf_error(err);

	return ret;

}

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