Merge tag 'vfs-7.2-rc1.exportfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull exportfs updates from Christian Brauner:
 "This cleans up the exportfs support for block-style layouts that
  provide direct block device access: the operations for layout-based
  block device access are split out of struct export_operations into a
  separate header, ->commit_blocks() no longer takes a struct iattr
  argument, and the way support for layout-based block device access is
  detected is reworked.

  nfsd's blocklayout code also stops honoring loca_time_modify. This is
  preparation for supporting export of more than a single device per
  file system"

* tag 'vfs-7.2-rc1.exportfs' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  exportfs,nfsd: rework checking for layout-based block device access support
  exportfs: don't pass struct iattr to ->commit_blocks
  exportfs: split out the ops for layout-based block device access
  nfsd/blocklayout: always ignore loca_time_modify

3 files changed, 38 insertions, 21 deletions

diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index e3e3c3c89840..9b2ad3786b19 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -244,8 +244,6 @@ const struct export_operations xfs_export_operations = {
 	.get_parent		= xfs_fs_get_parent,
 	.commit_metadata	= xfs_fs_nfs_commit_metadata,
 #ifdef CONFIG_EXPORTFS_BLOCK_OPS
-	.get_uuid		= xfs_fs_get_uuid,
-	.map_blocks		= xfs_fs_map_blocks,
-	.commit_blocks		= xfs_fs_commit_blocks,
+	.block_ops		= &xfs_export_block_ops,
 #endif
 };
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index d92993367ab6..f8535ecde21a 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -13,6 +13,7 @@
 #include "xfs_bmap.h"
 #include "xfs_iomap.h"
 #include "xfs_pnfs.h"
+#include <linux/exportfs_block.h>
 
 /*
  * Ensure that we do not have any outstanding pNFS layouts that can be used by
@@ -45,11 +46,22 @@ xfs_break_leased_layouts(
 	return error;
 }
 
+static expfs_block_layouts_t
+xfs_fs_layouts_supported(
+	struct super_block	*sb)
+{
+	expfs_block_layouts_t	supported = EXPFS_BLOCK_IN_BAND_ID;
+
+	if (exportfs_bdev_supports_out_of_band_id(sb->s_bdev))
+		supported |= EXPFS_BLOCK_OUT_OF_BAND_ID;
+	return supported;
+}
+
 /*
  * Get a unique ID including its location so that the client can identify
  * the exported device.
  */
-int
+static int
 xfs_fs_get_uuid(
 	struct super_block	*sb,
 	u8			*buf,
@@ -104,7 +116,7 @@ xfs_fs_map_update_inode(
 /*
  * Get a layout for the pNFS client.
  */
-int
+static int
 xfs_fs_map_blocks(
 	struct inode		*inode,
 	loff_t			offset,
@@ -255,28 +267,27 @@ xfs_pnfs_validate_isize(
  * to manually flush the cache here similar to what the fsync code path does
  * for datasyncs on files that have no dirty metadata.
  */
-int
+static int
 xfs_fs_commit_blocks(
 	struct inode		*inode,
 	struct iomap		*maps,
 	int			nr_maps,
-	struct iattr		*iattr)
+	loff_t			new_size)
 {
 	struct xfs_inode	*ip = XFS_I(inode);
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_trans	*tp;
+	struct timespec64	now;
 	bool			update_isize = false;
 	int			error, i;
 	loff_t			size;
 
-	ASSERT(iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME));
-
 	xfs_ilock(ip, XFS_IOLOCK_EXCL);
 
 	size = i_size_read(inode);
-	if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size > size) {
+	if (new_size > size) {
 		update_isize = true;
-		size = iattr->ia_size;
+		size = new_size;
 	}
 
 	for (i = 0; i < nr_maps; i++) {
@@ -321,11 +332,13 @@ xfs_fs_commit_blocks(
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 
-	ASSERT(!(iattr->ia_valid & (ATTR_UID | ATTR_GID)));
-	setattr_copy(&nop_mnt_idmap, inode, iattr);
+	now = inode_set_ctime_current(inode);
+	inode_set_atime_to_ts(inode, now);
+	inode_set_mtime_to_ts(inode, now);
+
 	if (update_isize) {
-		i_size_write(inode, iattr->ia_size);
-		ip->i_disk_size = iattr->ia_size;
+		i_size_write(inode, new_size);
+		ip->i_disk_size = new_size;
 	}
 
 	xfs_trans_set_sync(tp);
@@ -335,3 +348,10 @@ out_drop_iolock:
 	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 	return error;
 }
+
+const struct exportfs_block_ops xfs_export_block_ops = {
+	.layouts_supported	= xfs_fs_layouts_supported,
+	.get_uuid		= xfs_fs_get_uuid,
+	.map_blocks		= xfs_fs_map_blocks,
+	.commit_blocks		= xfs_fs_commit_blocks,
+};
diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h
index 940c6c2ad88c..bf43b2009e4c 100644
--- a/fs/xfs/xfs_pnfs.h
+++ b/fs/xfs/xfs_pnfs.h
@@ -2,13 +2,9 @@
 #ifndef _XFS_PNFS_H
 #define _XFS_PNFS_H 1
 
-#ifdef CONFIG_EXPORTFS_BLOCK_OPS
-int xfs_fs_get_uuid(struct super_block *sb, u8 *buf, u32 *len, u64 *offset);
-int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length,
-		struct iomap *iomap, bool write, u32 *device_generation);
-int xfs_fs_commit_blocks(struct inode *inode, struct iomap *maps, int nr_maps,
-		struct iattr *iattr);
+#include <linux/exportfs_block.h>
 
+#ifdef CONFIG_EXPORTFS_BLOCK_OPS
 int xfs_break_leased_layouts(struct inode *inode, uint *iolock,
 		bool *did_unlock);
 #else
@@ -18,4 +14,7 @@ xfs_break_leased_layouts(struct inode *inode, uint *iolock, bool *did_unlock)
 	return 0;
 }
 #endif /* CONFIG_EXPORTFS_BLOCK_OPS */
+
+extern const struct exportfs_block_ops xfs_export_block_ops;
+
 #endif /* _XFS_PNFS_H */