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authorDavid Howells <dhowells@redhat.com>2006-06-23 02:02:58 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-23 07:42:45 -0700
commit726c334223180e3c0197cc980a432681370d4baf (patch)
tree8327b354bb3dc959a6606051ae6f8d4d035e38a2 /security
parent454e2398be9b9fa30433fccc548db34d19aa9958 (diff)
downloadop-kernel-dev-726c334223180e3c0197cc980a432681370d4baf.zip
op-kernel-dev-726c334223180e3c0197cc980a432681370d4baf.tar.gz
[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 'security')
-rw-r--r--security/dummy.c2
-rw-r--r--security/selinux/hooks.c6
2 files changed, 4 insertions, 4 deletions
diff --git a/security/dummy.c b/security/dummy.c
index 6de4a4a..c98d553 100644
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -191,7 +191,7 @@ static int dummy_sb_kern_mount (struct super_block *sb, void *data)
return 0;
}
-static int dummy_sb_statfs (struct super_block *sb)
+static int dummy_sb_statfs (struct dentry *dentry)
{
return 0;
}
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 524915d..093efba 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1903,13 +1903,13 @@ static int selinux_sb_kern_mount(struct super_block *sb, void *data)
return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
}
-static int selinux_sb_statfs(struct super_block *sb)
+static int selinux_sb_statfs(struct dentry *dentry)
{
struct avc_audit_data ad;
AVC_AUDIT_DATA_INIT(&ad,FS);
- ad.u.fs.dentry = sb->s_root;
- return superblock_has_perm(current, sb, FILESYSTEM__GETATTR, &ad);
+ ad.u.fs.dentry = dentry->d_sb->s_root;
+ return superblock_has_perm(current, dentry->d_sb, FILESYSTEM__GETATTR, &ad);
}
static int selinux_mount(char * dev_name,
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