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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 /arch/parisc/hpux
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 'arch/parisc/hpux')
-rw-r--r--arch/parisc/hpux/sys_hpux.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/parisc/hpux/sys_hpux.c b/arch/parisc/hpux/sys_hpux.c
index 05273ccced0e..cb69727027ae 100644
--- a/arch/parisc/hpux/sys_hpux.c
+++ b/arch/parisc/hpux/sys_hpux.c
@@ -145,7 +145,7 @@ static int hpux_ustat(dev_t dev, struct hpux_ustat __user *ubuf)
145 s = user_get_super(dev); 145 s = user_get_super(dev);
146 if (s == NULL) 146 if (s == NULL)
147 goto out; 147 goto out;
148 err = vfs_statfs(s, &sbuf); 148 err = vfs_statfs(s->s_root, &sbuf);
149 drop_super(s); 149 drop_super(s);
150 if (err) 150 if (err)
151 goto out; 151 goto out;
@@ -186,12 +186,12 @@ struct hpux_statfs {
186 int16_t f_pad; 186 int16_t f_pad;
187}; 187};
188 188
189static int vfs_statfs_hpux(struct super_block *sb, struct hpux_statfs *buf) 189static int vfs_statfs_hpux(struct dentry *dentry, struct hpux_statfs *buf)
190{ 190{
191 struct kstatfs st; 191 struct kstatfs st;
192 int retval; 192 int retval;
193 193
194 retval = vfs_statfs(sb, &st); 194 retval = vfs_statfs(dentry, &st);
195 if (retval) 195 if (retval)
196 return retval; 196 return retval;
197 197
@@ -219,7 +219,7 @@ asmlinkage long hpux_statfs(const char __user *path,
219 error = user_path_walk(path, &nd); 219 error = user_path_walk(path, &nd);
220 if (!error) { 220 if (!error) {
221 struct hpux_statfs tmp; 221 struct hpux_statfs tmp;
222 error = vfs_statfs_hpux(nd.dentry->d_inode->i_sb, &tmp); 222 error = vfs_statfs_hpux(nd.dentry, &tmp);
223 if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) 223 if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
224 error = -EFAULT; 224 error = -EFAULT;
225 path_release(&nd); 225 path_release(&nd);
@@ -237,7 +237,7 @@ asmlinkage long hpux_fstatfs(unsigned int fd, struct hpux_statfs __user * buf)
237 file = fget(fd); 237 file = fget(fd);
238 if (!file) 238 if (!file)
239 goto out; 239 goto out;
240 error = vfs_statfs_hpux(file->f_dentry->d_inode->i_sb, &tmp); 240 error = vfs_statfs_hpux(file->f_dentry, &tmp);
241 if (!error && copy_to_user(buf, &tmp, sizeof(tmp))) 241 if (!error && copy_to_user(buf, &tmp, sizeof(tmp)))
242 error = -EFAULT; 242 error = -EFAULT;
243 fput(file); 243 fput(file);