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authorMiklos Szeredi <miklos@szeredi.hu>2008-07-02 21:12:01 +0200
committerSteven Whitehouse <swhiteho@redhat.com>2008-07-03 10:22:01 +0100
commitf58ba889106af60f52af792efbe1973e458a2138 (patch)
treef81426c7f611b74dec685cd416d3da8e7fe647d2 /fs/gfs2/inode.c
parentf17172e00167238cc5e4f61ac4e78c68e5c558ec (diff)
[GFS2] don't call permission()
GFS2 calls permission() to verify permissions after locks on the files have been taken. For this it's sufficient to call gfs2_permission() instead. This results in the following changes: - IS_RDONLY() check is not performed - IS_IMMUTABLE() check is not performed - devcgroup_inode_permission() is not called - security_inode_permission() is not called IS_RDONLY() should be unnecessary anyway, as the per-mount read-only flag should provide protection against read-only remounts during operations. do_gfs2_set_flags() has been fixed to perform mnt_want_write()/mnt_drop_write() to protect against remounting read-only. IS_IMMUTABLE has been added to gfs2_permission() Repeating the security checks seems to be pointless, as they don't normally change, and if they do, it's independent of the filesystem state. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.c')
-rw-r--r--fs/gfs2/inode.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 09453d057e4..caf40908335 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -504,7 +504,7 @@ struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
}
if (!is_root) {
- error = permission(dir, MAY_EXEC, NULL);
+ error = gfs2_permission(dir, MAY_EXEC);
if (error)
goto out;
}
@@ -667,7 +667,7 @@ static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
{
int error;
- error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
+ error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
if (error)
return error;
@@ -1134,7 +1134,7 @@ int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
if (IS_APPEND(&dip->i_inode))
return -EPERM;
- error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
+ error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
if (error)
return error;