[JFFS2] Tidy up fix for ACL/permissions problem.

[In commit 9ed437c50d89eabae763dd422579f73fdebf288d we fixed a problem 
with standard permissions on newly-created inodes, when POSIX ACLs are 
enabled. This cleans it up...]

The attached patch separate jffs2_init_acl() into two parts.

The one is jffs2_init_acl_pre() called from jffs2_new_inode().
It compute ACL oriented inode->i_mode bits, and allocate in-memory ACL
objects associated with the new inode just before when inode meta
infomation is written to the medium.

The other is jffs2_init_acl_post() called from jffs2_symlink(),
jffs2_mkdir(), jffs2_mknod() and jffs2_do_create().
It actually writes in-memory ACL objects into the medium next to
the success of writing meta-information.

In the current implementation, we have to write a same inode meta
infomation twice when inode->i_mode is updated by the default ACL.
However, we can avoid the behavior by putting an updated i_mode
before it is written at first, as jffs2_init_acl_pre() doing.

Signed-off-by: KaiGai Kohei <kaigai@ak.jp.nec.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c
index 2f5695446d0f..147e2cbee9e4 100644
--- a/fs/jffs2/write.c
+++ b/fs/jffs2/write.c
@@ -465,6 +465,14 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str
 
         up(&f->sem);
         jffs2_complete_reservation(c);
+
+        ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode);
+        if (ret)
+                return ret;
+        ret = jffs2_init_acl_post(&f->vfs_inode);
+        if (ret)
+                return ret;
+
         ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
                                 ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));