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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/compat.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/compat.c')
-rw-r--r--fs/compat.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/compat.c b/fs/compat.c
index b1f64786a613..7e7e5bc4f3cf 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -197,7 +197,7 @@ asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs
197 error = user_path_walk(path, &nd); 197 error = user_path_walk(path, &nd);
198 if (!error) { 198 if (!error) {
199 struct kstatfs tmp; 199 struct kstatfs tmp;
200 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); 200 error = vfs_statfs(nd.dentry, &tmp);
201 if (!error) 201 if (!error)
202 error = put_compat_statfs(buf, &tmp); 202 error = put_compat_statfs(buf, &tmp);
203 path_release(&nd); 203 path_release(&nd);
@@ -215,7 +215,7 @@ asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user
215 file = fget(fd); 215 file = fget(fd);
216 if (!file) 216 if (!file)
217 goto out; 217 goto out;
218 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); 218 error = vfs_statfs(file->f_dentry, &tmp);
219 if (!error) 219 if (!error)
220 error = put_compat_statfs(buf, &tmp); 220 error = put_compat_statfs(buf, &tmp);
221 fput(file); 221 fput(file);
@@ -265,7 +265,7 @@ asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, s
265 error = user_path_walk(path, &nd); 265 error = user_path_walk(path, &nd);
266 if (!error) { 266 if (!error) {
267 struct kstatfs tmp; 267 struct kstatfs tmp;
268 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp); 268 error = vfs_statfs(nd.dentry, &tmp);
269 if (!error) 269 if (!error)
270 error = put_compat_statfs64(buf, &tmp); 270 error = put_compat_statfs64(buf, &tmp);
271 path_release(&nd); 271 path_release(&nd);
@@ -286,7 +286,7 @@ asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct c
286 file = fget(fd); 286 file = fget(fd);
287 if (!file) 287 if (!file)
288 goto out; 288 goto out;
289 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp); 289 error = vfs_statfs(file->f_dentry, &tmp);
290 if (!error) 290 if (!error)
291 error = put_compat_statfs64(buf, &tmp); 291 error = put_compat_statfs64(buf, &tmp);
292 fput(file); 292 fput(file);