From 7909f2bf835376a20d6dbf853eb459a27566eba2 Mon Sep 17 00:00:00 2001 From: Tao Ma Date: Tue, 18 Dec 2007 15:47:25 +0800 Subject: [PATCH 2/2] ocfs2: Implement group add for online resize This patch adds the ability for a userspace program to request that a properly formatted cluster group be added to the main allocation bitmap for an Ocfs2 file system. The request is made via an ioctl, OCFS2_IOC_GROUP_ADD. On a high level, this is similar to ext3, but we use a different ioctl as the structure which has to be passed through is different. During an online resize, tunefs.ocfs2 will format any new cluster groups which must be added to complete the resize, and call OCFS2_IOC_GROUP_ADD on each one. Kernel verifies that the core cluster group information is valid and then does the work of linking it into the global allocation bitmap. Signed-off-by: Tao Ma Signed-off-by: Mark Fasheh --- fs/ocfs2/ioctl.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'fs/ocfs2/ioctl.c') diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c index b74b24ecf0e..7003d5820d7 100644 --- a/fs/ocfs2/ioctl.c +++ b/fs/ocfs2/ioctl.c @@ -119,6 +119,7 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp, int new_clusters; int status; struct ocfs2_space_resv sr; + struct ocfs2_new_group_input input; switch (cmd) { case OCFS2_IOC_GETFLAGS: @@ -147,6 +148,12 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp, return -EFAULT; return ocfs2_group_extend(inode, new_clusters); + case OCFS2_IOC_GROUP_ADD: + case OCFS2_IOC_GROUP_ADD64: + if (copy_from_user(&input, (int __user *) arg, sizeof(input))) + return -EFAULT; + + return ocfs2_group_add(inode, &input); default: return -ENOTTY; } @@ -170,6 +177,8 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) case OCFS2_IOC_UNRESVSP: case OCFS2_IOC_UNRESVSP64: case OCFS2_IOC_GROUP_EXTEND: + case OCFS2_IOC_GROUP_ADD: + case OCFS2_IOC_GROUP_ADD64: break; default: return -ENOIOCTLCMD; -- cgit v1.2.3-18-g5258