From 726c334223180e3c0197cc980a432681370d4baf Mon Sep 17 00:00:00 2001 From: David Howells Date: Fri, 23 Jun 2006 02:02:58 -0700 Subject: [PATCH] VFS: Permit filesystem to perform statfs with a known root dentry Give the statfs superblock operation a dentry pointer rather than a superblock pointer. This complements the get_sb() patch. That reduced the significance of sb->s_root, allowing NFS to place a fake root there. However, NFS does require a dentry to use as a target for the statfs operation. This permits the root in the vfsmount to be used instead. linux/mount.h has been added where necessary to make allyesconfig build successfully. Interest has also been expressed for use with the FUSE and XFS filesystems. Signed-off-by: David Howells Acked-by: Al Viro Cc: Nathan Scott Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/qnx4/inode.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'fs/qnx4') diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c index e6cca5cd4b44..2f24c46f72a1 100644 --- a/fs/qnx4/inode.c +++ b/fs/qnx4/inode.c @@ -128,7 +128,7 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb); static void qnx4_destroy_inode(struct inode *inode); static void qnx4_read_inode(struct inode *); static int qnx4_remount(struct super_block *sb, int *flags, char *data); -static int qnx4_statfs(struct super_block *, struct kstatfs *); +static int qnx4_statfs(struct dentry *, struct kstatfs *); static struct super_operations qnx4_sops = { @@ -282,8 +282,10 @@ unsigned long qnx4_block_map( struct inode *inode, long iblock ) return block; } -static int qnx4_statfs(struct super_block *sb, struct kstatfs *buf) +static int qnx4_statfs(struct dentry *dentry, struct kstatfs *buf) { + struct super_block *sb = dentry->d_sb; + lock_kernel(); buf->f_type = sb->s_magic; -- cgit