diff mbox series

[v2] fs: ceph: Adding new return type vm_fault_t

Message ID 20180723160224.GA6942@jordon-HP-15-Notebook-PC (mailing list archive)
State New, archived
Headers show
Series [v2] fs: ceph: Adding new return type vm_fault_t | expand

Commit Message

Souptick Joarder July 23, 2018, 4:02 p.m. UTC 
Use new return type vm_fault_t for page_mkwrite
and fault handler.

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
---
v2: Fixed kbuild warning

 fs/ceph/addr.c | 62 ++++++++++++++++++++++++++++++----------------------------
 1 file changed, 32 insertions(+), 30 deletions(-)

Comments

Yan, Zheng July 24, 2018, 12:20 a.m. UTC | #1 
> On Jul 24, 2018, at 00:02, Souptick Joarder <jrdr.linux@gmail.com> wrote:
> 
> Use new return type vm_fault_t for page_mkwrite
> and fault handler.
> 
> Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
> ---
> v2: Fixed kbuild warning
> 
> fs/ceph/addr.c | 62 ++++++++++++++++++++++++++++++----------------------------
> 1 file changed, 32 insertions(+), 30 deletions(-)
> 
> diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
> index 292b3d7..26beebe 100644
> --- a/fs/ceph/addr.c
> +++ b/fs/ceph/addr.c
> @@ -1431,7 +1431,7 @@ 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);
> @@ -1439,8 +1439,9 @@ 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);
> 
> @@ -1452,8 +1453,8 @@ 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",
> @@ -1465,16 +1466,17 @@ 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 */
> @@ -1482,7 +1484,6 @@ 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,
> @@ -1491,32 +1492,32 @@ 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;
> }
> @@ -1524,7 +1525,7 @@ static int ceph_filemap_fault(struct vm_fault *vmf)
> /*
>  * 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);
> @@ -1535,8 +1536,9 @@ 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)
> @@ -1550,10 +1552,10 @@ 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;
> 	}
> 
> @@ -1570,9 +1572,9 @@ 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",
> @@ -1590,13 +1592,13 @@ 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) {
> @@ -1610,14 +1612,14 @@ 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;
> }
> 

Applied, Thanks

Yan, Zheng

> -- 
> 1.9.1
> 

--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox series

Patch

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 292b3d7..26beebe 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1431,7 +1431,7 @@  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);
@@ -1439,8 +1439,9 @@  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);
 
@@ -1452,8 +1453,8 @@  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",
@@ -1465,16 +1466,17 @@  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 */
@@ -1482,7 +1484,6 @@  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,
@@ -1491,32 +1492,32 @@  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;
 }
@@ -1524,7 +1525,7 @@  static int ceph_filemap_fault(struct vm_fault *vmf)
 /*
  * 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);
@@ -1535,8 +1536,9 @@  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)
@@ -1550,10 +1552,10 @@  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;
 	}
 
@@ -1570,9 +1572,9 @@  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",
@@ -1590,13 +1592,13 @@  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) {
@@ -1610,14 +1612,14 @@  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;
 }