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authorDavid Howells <dhowells@redhat.com>2006-06-23 05:02:58 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 10:42:45 -0400
commit726c334223180e3c0197cc980a432681370d4baf (patch)
tree8327b354bb3dc959a6606051ae6f8d4d035e38a2 /fs/udf/super.c
parent454e2398be9b9fa30433fccc548db34d19aa9958 (diff)
[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 <dhowells@redhat.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: Nathan Scott <nathans@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/udf/super.c')
-rw-r--r--fs/udf/super.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 2250774a831d..44fe2cb0bbb2 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -91,7 +91,7 @@ static void udf_load_partdesc(struct super_block *, struct buffer_head *);
91static void udf_open_lvid(struct super_block *); 91static void udf_open_lvid(struct super_block *);
92static void udf_close_lvid(struct super_block *); 92static void udf_close_lvid(struct super_block *);
93static unsigned int udf_count_free(struct super_block *); 93static unsigned int udf_count_free(struct super_block *);
94static int udf_statfs(struct super_block *, struct kstatfs *); 94static int udf_statfs(struct dentry *, struct kstatfs *);
95 95
96/* UDF filesystem type */ 96/* UDF filesystem type */
97static int udf_get_sb(struct file_system_type *fs_type, 97static int udf_get_sb(struct file_system_type *fs_type,
@@ -1779,8 +1779,10 @@ udf_put_super(struct super_block *sb)
1779 * Written, tested, and released. 1779 * Written, tested, and released.
1780 */ 1780 */
1781static int 1781static int
1782udf_statfs(struct super_block *sb, struct kstatfs *buf) 1782udf_statfs(struct dentry *dentry, struct kstatfs *buf)
1783{ 1783{
1784 struct super_block *sb = dentry->d_sb;
1785
1784 buf->f_type = UDF_SUPER_MAGIC; 1786 buf->f_type = UDF_SUPER_MAGIC;
1785 buf->f_bsize = sb->s_blocksize; 1787 buf->f_bsize = sb->s_blocksize;
1786 buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb)); 1788 buf->f_blocks = UDF_SB_PARTLEN(sb, UDF_SB_PARTITION(sb));