[RFC][PATCH 00/36] Add checkpoint file operations

[RFC][PATCH 00/36] Add checkpoint file operations

[Matt Helsley]

Enable checkpoint of files and directories on various filesystems. These
are the easy ones where we know we have seekable files which can be
checkpointed via tools like rsync. For filesystems in this series the "magic"
lies in appropriately remounting things like ramfs and hostfs after tools
like rsync have been employed to save the filesystem contents. 

Applies to v14. Rebased cleanly to v15 locally, so I'm hopeful the series
will apply cleanly there too. This is an [RFC] so I haven't Cc'd all relevant
parties. However I have added Cc tags for them below my Signed-off-by in
anticipation of later submissions.

Cheers,
	-Matt Helsley
-- 
1.5.6.3

[RFC][PATCH 28/36] read_write.c | 1 +: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for generic, read-only files. At present,
 some/all files of the following filesystems use this generic definition:


	freevxfs, romfs, efs, cramfs, isofs, squashfs, befs

This generic filesystem operation definition includes a seek operation
and is thus restartable given the generic checkpoint operation.

Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/read_write.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/read_write.c b/fs/read_write.c
index ed63ea3..88655d5 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -27,6 +27,7 @@ const struct file_operations generic_ro_fops = {
 	.aio_read	= generic_file_aio_read,
 	.mmap		= generic_file_readonly_mmap,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 EXPORT_SYMBOL(generic_ro_fops);
-- 
1.5.6.3

[RFC][PATCH 05/36] cramfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for cramfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/cramfs/inode.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c
index dd3634e..0927503 100644
--- a/fs/cramfs/inode.c
+++ b/fs/cramfs/inode.c
@@ -532,6 +532,7 @@ static const struct file_operations cramfs_directory_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.readdir	= cramfs_readdir,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static const struct inode_operations cramfs_dir_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 26/36] xfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for xfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: xfs-masters-VZNHf3L845pBDgjK7y7TUQ@public.gmane.org
Cc: xfs-VZNHf3L845pBDgjK7y7TUQ@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/xfs/linux-2.6/xfs_file.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index f4e2554..8e1074b 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -258,6 +258,7 @@ const struct file_operations xfs_file_operations = {
 #ifdef HAVE_FOP_OPEN_EXEC
 	.open_exec	= xfs_file_open_exec,
 #endif
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct file_operations xfs_dir_file_operations = {
@@ -270,6 +271,7 @@ const struct file_operations xfs_dir_file_operations = {
 	.compat_ioctl	= xfs_file_compat_ioctl,
 #endif
 	.fsync		= xfs_file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static struct vm_operations_struct xfs_file_vm_ops = {
-- 
1.5.6.3

[RFC][PATCH 13/36] isofs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for iso directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/isofs/dir.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
index 2f0dc5a..a9fa99e 100644
--- a/fs/isofs/dir.c
+++ b/fs/isofs/dir.c
@@ -274,6 +274,7 @@ const struct file_operations isofs_dir_operations =
 {
 	.read = generic_read_dir,
 	.readdir = isofs_readdir,
+	.checkpoint = generic_file_checkpoint,
 };
 
 /*
-- 
1.5.6.3

[RFC][PATCH 09/36] hfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for hfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/hfs/dir.c   |    1 +
 fs/hfs/inode.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/hfs/dir.c b/fs/hfs/dir.c
index 7c69b98..8d90a24 100644
--- a/fs/hfs/dir.c
+++ b/fs/hfs/dir.c
@@ -318,6 +318,7 @@ const struct file_operations hfs_dir_operations = {
 	.readdir	= hfs_readdir,
 	.llseek		= generic_file_llseek,
 	.release	= hfs_dir_release,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations hfs_dir_inode_operations = {
diff --git a/fs/hfs/inode.c b/fs/hfs/inode.c
index a1cbff2..bf8950f 100644
--- a/fs/hfs/inode.c
+++ b/fs/hfs/inode.c
@@ -607,6 +607,7 @@ static const struct file_operations hfs_file_operations = {
 	.fsync		= file_fsync,
 	.open		= hfs_file_open,
 	.release	= hfs_file_release,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static const struct inode_operations hfs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 33/36] adfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for adfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/adfs/dir.c  |    1 +
 fs/adfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index e867ccf..c05783a 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -200,6 +200,7 @@ const struct file_operations adfs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.readdir	= adfs_readdir,
 	.fsync		= file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int
diff --git a/fs/adfs/file.c b/fs/adfs/file.c
index 36e381c..0d2f552 100644
--- a/fs/adfs/file.c
+++ b/fs/adfs/file.c
@@ -34,6 +34,7 @@ const struct file_operations adfs_file_operations = {
 	.write		= do_sync_write,
 	.aio_write	= generic_file_aio_write,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations adfs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 10/36] hfsplus: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for hfsplus files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/hfsplus/dir.c   |    1 +
 fs/hfsplus/inode.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 5f40236..41fbf2d 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -497,4 +497,5 @@ const struct file_operations hfsplus_dir_operations = {
 	.ioctl          = hfsplus_ioctl,
 	.llseek		= generic_file_llseek,
 	.release	= hfsplus_dir_release,
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 1bcf597..19abd7e 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -286,6 +286,7 @@ static const struct file_operations hfsplus_file_operations = {
 	.open		= hfsplus_file_open,
 	.release	= hfsplus_file_release,
 	.ioctl          = hfsplus_ioctl,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
-- 
1.5.6.3

[RFC][PATCH 06/36] ecryptfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for ecryptfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/ecryptfs/file.c    |    2 ++
 fs/ecryptfs/miscdev.c |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 9e94405..e6d2523 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -306,6 +306,7 @@ const struct file_operations ecryptfs_dir_fops = {
 	.fsync = ecryptfs_fsync,
 	.fasync = ecryptfs_fasync,
 	.splice_read = generic_file_splice_read,
+	.checkpoint = generic_file_checkpoint,
 };
 
 const struct file_operations ecryptfs_main_fops = {
@@ -323,6 +324,7 @@ const struct file_operations ecryptfs_main_fops = {
 	.fsync = ecryptfs_fsync,
 	.fasync = ecryptfs_fasync,
 	.splice_read = generic_file_splice_read,
+	.checkpoint = generic_file_checkpoint,
 };
 
 static int
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index dda3c58..07fbbe8 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -487,6 +487,7 @@ static const struct file_operations ecryptfs_miscdev_fops = {
 	.read    = ecryptfs_miscdev_read,
 	.write   = ecryptfs_miscdev_write,
 	.release = ecryptfs_miscdev_release,
+	.checkpoint = generic_file_checkpoint,
 };
 
 static struct miscdevice ecryptfs_miscdev = {
-- 
1.5.6.3

[RFC][PATCH 17/36] ntfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for ntfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Anton Altaparmakov <aia21-5LkwijKnu/2sTnJN9+BGXg@public.gmane.org>
Cc: linux-ntfs-dev-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/ntfs/dir.c  |    1 +
 fs/ntfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ntfs/dir.c b/fs/ntfs/dir.c
index 5a9e344..4fe3759 100644
--- a/fs/ntfs/dir.c
+++ b/fs/ntfs/dir.c
@@ -1572,4 +1572,5 @@ const struct file_operations ntfs_dir_ops = {
 	/*.ioctl	= ,*/			/* Perform function on the
 						   mounted filesystem. */
 	.open		= ntfs_dir_open,	/* Open directory. */
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 3140a44..d63336e 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -2282,6 +2282,7 @@ const struct file_operations ntfs_file_ops = {
 						    on the ntfs partition.  We
 						    do not need to care about
 						    the data source. */
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations ntfs_file_inode_ops = {
-- 
1.5.6.3

[RFC][PATCH 11/36] hpfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for hpfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/hpfs/dir.c  |    1 +
 fs/hpfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
index 6916c41..e88bde6 100644
--- a/fs/hpfs/dir.c
+++ b/fs/hpfs/dir.c
@@ -321,4 +321,5 @@ const struct file_operations hpfs_dir_ops =
 	.readdir	= hpfs_readdir,
 	.release	= hpfs_dir_release,
 	.fsync		= hpfs_file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
index 64ab522..a24242e 100644
--- a/fs/hpfs/file.c
+++ b/fs/hpfs/file.c
@@ -138,6 +138,7 @@ const struct file_operations hpfs_file_ops =
 	.release	= hpfs_file_release,
 	.fsync		= hpfs_file_fsync,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations hpfs_file_iops =
-- 
1.5.6.3

[RFC][PATCH 35/36] nilfs2: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation to nilfs2 files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: KONISHI Ryusuke <konishi.ryusuke-Zyj7fXuS5i5L9jVzuh4AOg@public.gmane.org>
Cc: users-JrjvKiOkagjYtjvyW6yDsg@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/nilfs2/dir.c  |    2 +-
 fs/nilfs2/file.c |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 54100ac..38fd744 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -707,5 +707,5 @@ struct file_operations nilfs_dir_operations = {
 	.compat_ioctl	= nilfs_ioctl,
 #endif	/* CONFIG_COMPAT */
 	.fsync		= nilfs_sync_file,
-
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 6bd84a0..0f27ab5 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -136,6 +136,7 @@ static int nilfs_file_mmap(struct file *file, struct vm_area_struct *vma)
  */
 struct file_operations nilfs_file_operations = {
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 	.read		= do_sync_read,
 	.write		= do_sync_write,
 	.aio_read	= generic_file_aio_read,
-- 
1.5.6.3

[RFC][PATCH 07/36] fat: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for fat files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/fat/dir.c  |    1 +
 fs/fat/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 3a7f603..3baecf8 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -841,6 +841,7 @@ const struct file_operations fat_dir_operations = {
 	.compat_ioctl	= fat_compat_dir_ioctl,
 #endif
 	.fsync		= file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int fat_get_short_entry(struct inode *dir, loff_t *pos,
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 0a7f4a9..f2abe6c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -144,6 +144,7 @@ const struct file_operations fat_file_operations = {
 	.ioctl		= fat_generic_ioctl,
 	.fsync		= file_fsync,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int fat_cont_expand(struct inode *inode, loff_t size)
-- 
1.5.6.3

[RFC][PATCH 03/36] bfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for bfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/bfs/dir.c  |    1 +
 fs/bfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/bfs/dir.c b/fs/bfs/dir.c
index 4dd1b62..dd34403 100644
--- a/fs/bfs/dir.c
+++ b/fs/bfs/dir.c
@@ -81,6 +81,7 @@ const struct file_operations bfs_dir_operations = {
 	.readdir	= bfs_readdir,
 	.fsync		= file_fsync,
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 extern void dump_imap(const char *, struct super_block *);
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index 6a02126..c74d5b9 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -30,6 +30,7 @@ const struct file_operations bfs_file_operations = {
 	.aio_write	= generic_file_aio_write,
 	.mmap		= generic_file_mmap,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int bfs_move_block(unsigned long from, unsigned long to,
-- 
1.5.6.3

[RFC][PATCH 20/36] reiserfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for reiserfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: reiserfs-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/reiserfs/dir.c  |    1 +
 fs/reiserfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index 67a80d7..8c39774 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -24,6 +24,7 @@ const struct file_operations reiserfs_dir_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl = reiserfs_compat_ioctl,
 #endif
+	.checkpoint = generic_file_checkpoint,
 };
 
 static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 9f43666..a5dcc02 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -297,6 +297,7 @@ const struct file_operations reiserfs_file_operations = {
 	.splice_read = generic_file_splice_read,
 	.splice_write = generic_file_splice_write,
 	.llseek = generic_file_llseek,
+	.checkpoint = generic_file_checkpoint,
 };
 
 const struct inode_operations reiserfs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 34/36] exofs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation to exofs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Boaz Harrosh <bharrosh-C4P08NqkoRlBDgjK7y7TUQ@public.gmane.org>
Cc: Avishay Traeger <avishay-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-fsdevel <linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
---
 fs/exofs/dir.c  |    1 +
 fs/exofs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
index 65b0c8c..5184c15 100644
--- a/fs/exofs/dir.c
+++ b/fs/exofs/dir.c
@@ -669,4 +669,5 @@ const struct file_operations exofs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.readdir	= exofs_readdir,
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
index 6ed7fe4..b94e792 100644
--- a/fs/exofs/file.c
+++ b/fs/exofs/file.c
@@ -68,6 +68,7 @@ static int exofs_flush(struct file *file, fl_owner_t id)
 
 const struct file_operations exofs_file_operations = {
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 	.read		= do_sync_read,
 	.write		= do_sync_write,
 	.aio_read	= generic_file_aio_read,
-- 
1.5.6.3

[RFC][PATCH 02/36] befs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for befs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/befs/linuxvfs.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 76afd0d..7b4a4dc 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -67,6 +67,7 @@ static const struct file_operations befs_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= befs_readdir,
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static const struct inode_operations befs_dir_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 15/36] jfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for jfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Dave Kleikamp <shaggy-V7BBcbaFuwjMbYB6QlFGEg@public.gmane.org>
Cc: jfs-discussion-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/jfs/file.c  |    1 +
 fs/jfs/namei.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 7f6063a..90ab090 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -116,4 +116,5 @@ const struct file_operations jfs_file_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= jfs_compat_ioctl,
 #endif
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 514ee2e..5486db9 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1556,6 +1556,7 @@ const struct file_operations jfs_dir_operations = {
 	.compat_ioctl	= jfs_compat_ioctl,
 #endif
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int jfs_ci_hash(struct dentry *dir, struct qstr *this)
-- 
1.5.6.3

[RFC][PATCH 30/36] omfs: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operations for omfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/omfs/dir.c  |    1 +
 fs/omfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index c7275cf..5ed9cb3 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -502,4 +502,5 @@ struct file_operations omfs_dir_operations = {
 	.read = generic_read_dir,
 	.readdir = omfs_readdir,
 	.llseek = generic_file_llseek,
+	.checkpoint = generic_file_checkpoint,
 };
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index 834b233..ee669e5 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -346,6 +346,7 @@ struct file_operations omfs_file_operations = {
 	.mmap = generic_file_mmap,
 	.fsync = omfs_sync_file,
 	.splice_read = generic_file_splice_read,
+	.checkpoint = generic_file_checkpoint,
 };
 
 struct inode_operations omfs_file_inops = {
-- 
1.5.6.3

[RFC][PATCH 23/36] sysv: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for sysv filesystem files and
 directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/sysv/dir.c  |    1 +
 fs/sysv/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/sysv/dir.c b/fs/sysv/dir.c
index 56f6552..ff0adf1 100644
--- a/fs/sysv/dir.c
+++ b/fs/sysv/dir.c
@@ -25,6 +25,7 @@ const struct file_operations sysv_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= sysv_readdir,
 	.fsync		= sysv_sync_file,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static inline void dir_put_page(struct page *page)
diff --git a/fs/sysv/file.c b/fs/sysv/file.c
index 589be21..139593d 100644
--- a/fs/sysv/file.c
+++ b/fs/sysv/file.c
@@ -28,6 +28,7 @@ const struct file_operations sysv_file_operations = {
 	.mmap		= generic_file_mmap,
 	.fsync		= sysv_sync_file,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations sysv_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 01/36] affs: Add checkpoint file operations

[Matt Helsley]

Enable checkpoint of files and directories on affs.

Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/affs/dir.c  |    1 +
 fs/affs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/affs/dir.c b/fs/affs/dir.c
index 7b36904..c5110a1 100644
--- a/fs/affs/dir.c
+++ b/fs/affs/dir.c
@@ -22,6 +22,7 @@ const struct file_operations affs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.readdir	= affs_readdir,
 	.fsync		= file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 /*
diff --git a/fs/affs/file.c b/fs/affs/file.c
index 9246cb4..3a6f8ea 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -36,6 +36,7 @@ const struct file_operations affs_file_operations = {
 	.release	= affs_file_release,
 	.fsync		= file_fsync,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations affs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 16/36] nfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for regular nfs files and directories.
 Skip the various /proc files for now.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Trond Myklebust <Trond.Myklebust-HgOvQuBEEgTQT0dZR+AlfA@public.gmane.org>
Cc: linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/nfs/dir.c  |    1 +
 fs/nfs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 370b190..d1e02c5 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -64,6 +64,7 @@ const struct file_operations nfs_dir_operations = {
 	.open		= nfs_opendir,
 	.release	= nfs_release,
 	.fsync		= nfs_fsync_dir,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations nfs_dir_inode_operations = {
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 5a97bcf..b48da8d 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -75,6 +75,7 @@ const struct file_operations nfs_file_operations = {
 	.splice_read	= nfs_file_splice_read,
 	.check_flags	= nfs_check_flags,
 	.setlease	= nfs_setlease,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations nfs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 31/36] ufs: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operations for ufs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/ufs/dir.c  |    1 +
 fs/ufs/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index dbbbc46..6842025 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -668,4 +668,5 @@ const struct file_operations ufs_dir_operations = {
 	.readdir	= ufs_readdir,
 	.fsync		= file_fsync,
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/ufs/file.c b/fs/ufs/file.c
index 625ef17..f1139d9 100644
--- a/fs/ufs/file.c
+++ b/fs/ufs/file.c
@@ -64,4 +64,5 @@ const struct file_operations ufs_file_operations = {
 	.open           = generic_file_open,
 	.fsync		= ufs_sync_file,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
-- 
1.5.6.3

[RFC][PATCH 12/36] hppfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for hppfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/hppfs/hppfs.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/hppfs/hppfs.c b/fs/hppfs/hppfs.c
index a5089a6..f132fa2 100644
--- a/fs/hppfs/hppfs.c
+++ b/fs/hppfs/hppfs.c
@@ -546,6 +546,7 @@ static const struct file_operations hppfs_file_fops = {
 	.read		= hppfs_read,
 	.write		= hppfs_write,
 	.open		= hppfs_open,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 struct hppfs_dirent {
@@ -597,6 +598,7 @@ static const struct file_operations hppfs_dir_fops = {
 	.readdir	= hppfs_readdir,
 	.open		= hppfs_dir_open,
 	.fsync		= hppfs_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static int hppfs_statfs(struct dentry *dentry, struct kstatfs *sf)
-- 
1.5.6.3

[RFC][PATCH 32/36] ramfs: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operations for ramfs files. NOTE: since simple_dir_operations
 are shared between multiple filesystems including ramfs, it's not currently
 possible to checkpoint open ramfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/ramfs/file-mmu.c   |    1 +
 fs/ramfs/file-nommu.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ramfs/file-mmu.c b/fs/ramfs/file-mmu.c
index 78f613c..4430239 100644
--- a/fs/ramfs/file-mmu.c
+++ b/fs/ramfs/file-mmu.c
@@ -47,6 +47,7 @@ const struct file_operations ramfs_file_operations = {
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= generic_file_splice_write,
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations ramfs_file_inode_operations = {
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index ebb2c41..5f7e20a 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -44,6 +44,7 @@ const struct file_operations ramfs_file_operations = {
 	.splice_read		= generic_file_splice_read,
 	.splice_write		= generic_file_splice_write,
 	.llseek			= generic_file_llseek,
+	.checkpoint		= generic_file_checkpoint,
 };
 
 const struct inode_operations ramfs_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 25/36] udf: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for udf filesystem files and
 directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Jan Kara <jack-AlSwsSmVLrQ@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/udf/dir.c  |    1 +
 fs/udf/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index 2efd4d5..90488f5 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -211,4 +211,5 @@ const struct file_operations udf_dir_operations = {
 	.readdir		= udf_readdir,
 	.ioctl			= udf_ioctl,
 	.fsync			= udf_fsync_file,
+	.checkpoint		= generic_file_checkpoint,
 };
diff --git a/fs/udf/file.c b/fs/udf/file.c
index eb91f3b..8e7ad98 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -212,6 +212,7 @@ const struct file_operations udf_file_operations = {
 	.fsync			= udf_fsync_file,
 	.splice_read		= generic_file_splice_read,
 	.llseek			= generic_file_llseek,
+	.checkpoint		= generic_file_checkpoint,
 };
 
 const struct inode_operations udf_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 27/36] efs: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operation for efs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/efs/dir.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/efs/dir.c b/fs/efs/dir.c
index 49308a2..3322f56 100644
--- a/fs/efs/dir.c
+++ b/fs/efs/dir.c
@@ -13,6 +13,7 @@ static int efs_readdir(struct file *, void *, filldir_t);
 const struct file_operations efs_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= efs_readdir,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations efs_dir_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 18/36] openpromfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for openromfs directories.
 Explicitly skip the properties for now.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/openpromfs/inode.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index ffcd04f..d1f0677 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -160,6 +160,7 @@ static const struct file_operations openpromfs_prop_ops = {
 	.read		= seq_read,
 	.llseek		= seq_lseek,
 	.release	= seq_release,
+	.checkpoint	= NULL,
 };
 
 static int openpromfs_readdir(struct file *, void *, filldir_t);
@@ -168,6 +169,7 @@ static const struct file_operations openprom_operations = {
 	.read		= generic_read_dir,
 	.readdir	= openpromfs_readdir,
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static struct dentry *openpromfs_lookup(struct inode *, struct dentry *, struct nameidata *);
-- 
1.5.6.3

[RFC][PATCH 14/36] jffs2: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for jffs2 files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/jffs2/dir.c  |    1 +
 fs/jffs2/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 6f60cc9..c2b6487 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -41,6 +41,7 @@ const struct file_operations jffs2_dir_operations =
 	.unlocked_ioctl=jffs2_ioctl,
 	.fsync =	jffs2_fsync,
 	.llseek =	generic_file_llseek,
+	.checkpoint =	generic_file_checkpoint,
 };
 
 
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 5edc2bf..6bc2bc6 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -50,6 +50,7 @@ const struct file_operations jffs2_file_operations =
 	.mmap =		generic_file_readonly_mmap,
 	.fsync =	jffs2_fsync,
 	.splice_read =	generic_file_splice_read,
+	.checkpoint =	generic_file_checkpoint,
 };
 
 /* jffs2_file_inode_operations */
-- 
1.5.6.3

[RFC][PATCH 36/36] hostfs: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operations for UML host filesystem files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Jeff Dike <jdike-OPE4K8JWMJJBDgjK7y7TUQ@public.gmane.org>
Cc: user-mode-linux-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
---
 fs/hostfs/hostfs_kern.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index fe02ad4..8ae55d8 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -417,6 +417,7 @@ int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 
 static const struct file_operations hostfs_file_fops = {
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 	.read		= do_sync_read,
 	.splice_read	= generic_file_splice_read,
 	.aio_read	= generic_file_aio_read,
@@ -430,6 +431,7 @@ static const struct file_operations hostfs_file_fops = {
 
 static const struct file_operations hostfs_dir_fops = {
 	.llseek		= generic_file_llseek,
+	.checkpoint	= generic_file_checkpoint,
 	.readdir	= hostfs_readdir,
 	.read		= generic_read_dir,
 };
-- 
1.5.6.3

[RFC][PATCH 22/36] squashfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for squashfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Phillip Lougher <phillip-cnXvMjJKhjYG2Il/BtU0GPXRex20P6io@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/squashfs/dir.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/fs/squashfs/dir.c b/fs/squashfs/dir.c
index 566b0ea..b0c5336 100644
--- a/fs/squashfs/dir.c
+++ b/fs/squashfs/dir.c
@@ -231,5 +231,6 @@ failed_read:
 
 const struct file_operations squashfs_dir_ops = {
 	.read = generic_read_dir,
-	.readdir = squashfs_readdir
+	.readdir = squashfs_readdir,
+	.checkpoint = generic_file_checkpoint,
 };
-- 
1.5.6.3

[RFC][PATCH 21/36] romfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for romfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/romfs/mmap-nommu.c |    1 +
 fs/romfs/super.c      |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/romfs/mmap-nommu.c b/fs/romfs/mmap-nommu.c
index f0511e8..03c24d9 100644
--- a/fs/romfs/mmap-nommu.c
+++ b/fs/romfs/mmap-nommu.c
@@ -72,4 +72,5 @@ const struct file_operations romfs_ro_fops = {
 	.splice_read		= generic_file_splice_read,
 	.mmap			= romfs_mmap,
 	.get_unmapped_area	= romfs_get_unmapped_area,
+	.checkpoint		= generic_file_checkpoint,
 };
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 10ca7d9..2cd77c7 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -282,6 +282,7 @@ error:
 static const struct file_operations romfs_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= romfs_readdir,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static struct inode_operations romfs_dir_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 19/36] qnx4: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for qnx4 files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/qnx4/dir.c  |    1 +
 fs/qnx4/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/qnx4/dir.c b/fs/qnx4/dir.c
index ea9ffef..2905691 100644
--- a/fs/qnx4/dir.c
+++ b/fs/qnx4/dir.c
@@ -85,6 +85,7 @@ const struct file_operations qnx4_dir_operations =
 	.read		= generic_read_dir,
 	.readdir	= qnx4_readdir,
 	.fsync		= file_fsync,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations qnx4_dir_inode_operations =
diff --git a/fs/qnx4/file.c b/fs/qnx4/file.c
index 867f42b..495885e 100644
--- a/fs/qnx4/file.c
+++ b/fs/qnx4/file.c
@@ -31,6 +31,7 @@ const struct file_operations qnx4_file_operations =
 	.aio_write	= generic_file_aio_write,
 	.fsync		= qnx4_sync_file,
 #endif
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations qnx4_file_inode_operations =
-- 
1.5.6.3

[RFC][PATCH 24/36] ubifs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for ubifs files and directories.


I think the debug files will also work with the generic file
checkpoint helper but it needs a bit more investigation to be
certain.

Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: Artem Bityutskiy <dedekind-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Cc: Adrian Hunter <ext-adrian.hunter-xNZwKgViW5gAvxtiuMwx3w@public.gmane.org>
Cc: linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/ubifs/debug.c |    1 +
 fs/ubifs/dir.c   |    1 +
 fs/ubifs/file.c  |    1 +
 3 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index ce2cd83..69a8892 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -2530,6 +2530,7 @@ static ssize_t write_debugfs_file(struct file *file, const char __user *buf,
 static const struct file_operations dfs_fops = {
 	.open = open_debugfs_file,
 	.write = write_debugfs_file,
+	.checkpoint = generic_file_checkpoint,
 	.owner = THIS_MODULE,
 };
 
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index f55d523..ab44811 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1209,4 +1209,5 @@ const struct file_operations ubifs_dir_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = ubifs_compat_ioctl,
 #endif
+	.checkpoint     = generic_file_checkpoint,
 };
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 6d34dc7..2d94676 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1595,4 +1595,5 @@ const struct file_operations ubifs_file_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = ubifs_compat_ioctl,
 #endif
+	.checkpoint     = generic_file_checkpoint,
 };
-- 
1.5.6.3

[RFC][PATCH 08/36] freevxfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for freevxfs directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/freevxfs/vxfs_lookup.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/freevxfs/vxfs_lookup.c b/fs/freevxfs/vxfs_lookup.c
index aee049c..3a09132 100644
--- a/fs/freevxfs/vxfs_lookup.c
+++ b/fs/freevxfs/vxfs_lookup.c
@@ -58,6 +58,7 @@ const struct inode_operations vxfs_dir_inode_ops = {
 
 const struct file_operations vxfs_dir_operations = {
 	.readdir =		vxfs_readdir,
+	.checkpoint =		generic_file_checkpoint,
 };
 
  
-- 
1.5.6.3

[RFC][PATCH 29/36] minix: Add checkpoint file operations

[Matt Helsley]

Add checkpoint operation for minix filesystem files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 fs/minix/dir.c  |    1 +
 fs/minix/file.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index d4946c4..79c8759 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -23,6 +23,7 @@ const struct file_operations minix_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= minix_readdir,
 	.fsync		= minix_sync_file,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static inline void dir_put_page(struct page *page)
diff --git a/fs/minix/file.c b/fs/minix/file.c
index 17765f6..10d793e 100644
--- a/fs/minix/file.c
+++ b/fs/minix/file.c
@@ -24,6 +24,7 @@ const struct file_operations minix_file_operations = {
 	.mmap		= generic_file_mmap,
 	.fsync		= minix_sync_file,
 	.splice_read	= generic_file_splice_read,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 const struct inode_operations minix_file_inode_operations = {
-- 
1.5.6.3

[RFC][PATCH 04/36] btrfs: Add checkpoint file operations

[Matt Helsley]

Add the checkpoint operation for btrfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/btrfs/file.c  |    1 +
 fs/btrfs/inode.c |    1 +
 fs/btrfs/super.c |    1 +
 3 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 482f8db..23d5c72 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1334,4 +1334,5 @@ struct file_operations btrfs_file_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= btrfs_ioctl,
 #endif
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 65219f6..583d57e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5158,6 +5158,7 @@ static struct file_operations btrfs_dir_file_operations = {
 #endif
 	.release        = btrfs_release_file,
 	.fsync		= btrfs_sync_file,
+	.checkpoint	= generic_file_checkpoint,
 };
 
 static struct extent_io_ops btrfs_extent_io_ops = {
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index a7acfe6..f16be9d 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -686,6 +686,7 @@ static const struct file_operations btrfs_ctl_fops = {
 	.unlocked_ioctl	 = btrfs_control_ioctl,
 	.compat_ioctl = btrfs_control_ioctl,
 	.owner	 = THIS_MODULE,
+	.checkpoint = generic_file_checkpoint,
 };
 
 static struct miscdevice btrfs_misc = {
-- 
1.5.6.3

Re: [RFC][PATCH 04/36] btrfs: Add checkpoint file operations

[Serge E. Hallyn]

Quoting Matt Helsley (matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):

...

> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> index a7acfe6..f16be9d 100644
> --- a/fs/btrfs/super.c
> +++ b/fs/btrfs/super.c
> @@ -686,6 +686,7 @@ static const struct file_operations btrfs_ctl_fops = {
>  	.unlocked_ioctl	 = btrfs_control_ioctl,
>  	.compat_ioctl = btrfs_control_ioctl,
>  	.owner	 = THIS_MODULE,
> +	.checkpoint = generic_file_checkpoint,
>  };

Do we really want this one?

-serge

Re: [RFC][PATCH 04/36] btrfs: Add checkpoint file operations

[Oren Laadan]

Serge E. Hallyn wrote:
> Quoting Matt Helsley (matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):
> 
> ...
> 
>> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
>> index a7acfe6..f16be9d 100644
>> --- a/fs/btrfs/super.c
>> +++ b/fs/btrfs/super.c
>> @@ -686,6 +686,7 @@ static const struct file_operations btrfs_ctl_fops = {
>>  	.unlocked_ioctl	 = btrfs_control_ioctl,
>>  	.compat_ioctl = btrfs_control_ioctl,
>>  	.owner	 = THIS_MODULE,
>> +	.checkpoint = generic_file_checkpoint,
>>  };
> 
> Do we really want this one?

We need to checkpoint the open file regardless of whether the underlying
filesystem has snapshot capabilities.

Oren.

Re: [RFC][PATCH 04/36] btrfs: Add checkpoint file operations

[Serge E. Hallyn]

Quoting Oren Laadan (orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org):
> 
> Serge E. Hallyn wrote:
> > Quoting Matt Helsley (matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):
> > 
> > ...
> > 
> >> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> >> index a7acfe6..f16be9d 100644
> >> --- a/fs/btrfs/super.c
> >> +++ b/fs/btrfs/super.c
> >> @@ -686,6 +686,7 @@ static const struct file_operations btrfs_ctl_fops = {
> >>  	.unlocked_ioctl	 = btrfs_control_ioctl,
> >>  	.compat_ioctl = btrfs_control_ioctl,
> >>  	.owner	 = THIS_MODULE,
> >> +	.checkpoint = generic_file_checkpoint,
> >>  };
> > 
> > Do we really want this one?
> 
> We need to checkpoint the open file regardless of whether the underlying
> filesystem has snapshot capabilities.

But maybe we need to refuse a checkpoint if a task is talking to the
underlying btrfs filesystem?

-serge

Re: [RFC][PATCH 04/36] btrfs: Add checkpoint file operations

[Matt Helsley]

On Mon, May 04, 2009 at 05:25:13PM -0500, Serge E. Hallyn wrote:
> Quoting Oren Laadan (orenl-eQaUEPhvms7ENvBUuze7eA@public.gmane.org):
> > 
> > Serge E. Hallyn wrote:
> > > Quoting Matt Helsley (matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org):
> > > 
> > > ...
> > > 
> > >> diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
> > >> index a7acfe6..f16be9d 100644
> > >> --- a/fs/btrfs/super.c
> > >> +++ b/fs/btrfs/super.c
> > >> @@ -686,6 +686,7 @@ static const struct file_operations btrfs_ctl_fops = {
> > >>  	.unlocked_ioctl	 = btrfs_control_ioctl,
> > >>  	.compat_ioctl = btrfs_control_ioctl,
> > >>  	.owner	 = THIS_MODULE,
> > >> +	.checkpoint = generic_file_checkpoint,
> > >>  };
> > > 
> > > Do we really want this one?
> > 
> > We need to checkpoint the open file regardless of whether the underlying
> > filesystem has snapshot capabilities.
> 
> But maybe we need to refuse a checkpoint if a task is talking to the
> underlying btrfs filesystem?

Good catch. The ctl file is a device node which, as best I can tell, is
empty. So the only obvious concern are the unlocked_ioctl()s. I expect
these ioctls() are "special" so generic_file_checkpoint() is probably
insufficient here.

v2 of the btrfs checkpoint op patch, which removes this hunk, is below.

A non-generic handler which blocks or prevents ioctl() during checkpoint would
seem to be required. Definitely a topic worthy of discussion on linux-fsdevel if
/when we add a .checkpoint op for this. 

As best I can tell we don't have anything to handle the generic ioctl() case
either. Am I wrong?

Cheers,
	-Matt Helsley
---

Add the checkpoint operation for btrfs files and directories.


Signed-off-by: Matt Helsley <matthltc-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
---
 fs/btrfs/file.c  |    1 +
 fs/btrfs/inode.c |    1 +
 fs/btrfs/super.c |    1 +
 3 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 482f8db..23d5c72 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1334,4 +1334,5 @@ struct file_operations btrfs_file_operations = {
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= btrfs_ioctl,
 #endif
+	.checkpoint	= generic_file_checkpoint,
 };
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 65219f6..583d57e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5158,6 +5158,7 @@ static struct file_operations btrfs_dir_file_operations = {
 #endif
 	.release        = btrfs_release_file,
 	.fsync		= btrfs_sync_file,
+	.checkpoint	= generic_file_checkpoint,
 };

 static struct extent_io_ops btrfs_extent_io_ops = {