lkml.org 
[lkml]   [2002]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patches in this message
/
Date
From
Subject[PATCH] rename bug patch for 2.4 --- my mangling undone
I just discovered how not to cut and paste a patch, sorry.  This one is correct, the other sent this morning will not work due to extra carriage returns getting into it.

Credit Oleg, his explanation is below, it is tested by several Namesys internal testers, and reviewed.

Hans
*****************************************************************************************************************

Hello!

A-rename_stale_item_bug-1.diff
This patch fixes 2 bugs in reiserfs_rename(). First one being attempt to access item before verifying it was
not moved since last access. Second is a window, where old filename may be written to disk with 'visible'
flag unset without these changes be journaled.

Bye,
Oleg

--- linux/fs/reiserfs/namei.c.orig Thu Jan 17 14:05:11 2002
+++ linux/fs/reiserfs/namei.c Thu Jan 17 17:09:23 2002
@@ -1057,7 +1057,7 @@
INITIALIZE_PATH (old_entry_path);
INITIALIZE_PATH (new_entry_path);
INITIALIZE_PATH (dot_dot_entry_path);
- struct item_head new_entry_ih, old_entry_ih ;
+ struct item_head new_entry_ih, old_entry_ih, dot_dot_ih ;
struct reiserfs_dir_entry old_de, new_de, dot_dot_de;
struct inode * old_inode, * new_inode;
int windex ;
@@ -1151,6 +1151,8 @@

copy_item_head(&old_entry_ih, get_ih(&old_entry_path)) ;

+
reiserfs_prepare_for_journal(old_inode->i_sb, old_de.de_bh, 1) ;
+
// look for new name by reiserfs_find_entry
new_de.de_gen_number_bit_string = 0;
retval = reiserfs_find_entry (new_dir, new_dentry->d_name.name, new_dentry->d_name.len,
@@ -1167,6 +1169,7 @@
if (S_ISDIR(old_inode->i_mode)) {
if (search_by_entry_key (new_dir->i_sb, &dot_dot_de.de_entry_key, &dot_dot_entry_path, &dot_dot_de) != NAME_FOUND)
BUG ();
+
copy_item_head(&dot_dot_ih, get_ih(&dot_dot_entry_path)) ;
// node containing ".." gets into transaction
reiserfs_prepare_for_journal(old_inode->i_sb, dot_dot_de.de_bh, 1) ;
}
@@ -1183,23 +1186,33 @@
** of the above checks could have scheduled. We have to be
** sure our items haven't been shifted by another process.
*/
-
if (!entry_points_to_object(new_dentry->d_name.name,
+
if (item_moved(&new_entry_ih, &new_entry_path) ||
+
!entry_points_to_object(new_dentry->d_name.name,
new_dentry->d_name.len,

&new_de, new_inode) ||
-
item_moved(&new_entry_ih, &new_entry_path) ||
item_moved(&old_entry_ih, &old_entry_path) ||
!entry_points_to_object (old_dentry->d_name.name,
old_dentry->d_name.len,

&old_de, old_inode)) {
reiserfs_restore_prepared_buffer (old_inode->i_sb, new_de.de_bh);
+
reiserfs_restore_prepared_buffer (old_inode->i_sb, old_de.de_bh);
if (S_ISDIR(old_inode->i_mode))
reiserfs_restore_prepared_buffer (old_inode->i_sb, dot_dot_de.de_bh);
continue;
}
+
if (S_ISDIR(old_inode->i_mode)) {
+
if ( item_moved(&dot_dot_ih, &dot_dot_entry_path) ||
+
!entry_points_to_object ( "..", 2, &dot_dot_de, old_dir) ) {
+
reiserfs_restore_prepared_buffer (old_inode->i_sb, old_de.de_bh);
+
reiserfs_restore_prepared_buffer (old_inode->i_sb, new_de.de_bh);
+
reiserfs_restore_prepared_buffer (old_inode->i_sb, dot_dot_de.de_bh);
+
continue;
+
}
+
}
+

RFALSE( S_ISDIR(old_inode->i_mode) &&
(!entry_points_to_object ("..", 2, &dot_dot_de, old_dir) ||
!reiserfs_buffer_prepared(dot_dot_de.de_bh)), "" );
+
!reiserfs_buffer_prepared(dot_dot_de.de_bh), "" );

break;
}
@@ -1212,6 +1225,7 @@
journal_mark_dirty (&th, old_dir->i_sb, new_de.de_bh);

mark_de_hidden (old_de.de_deh + old_de.de_entry_num);
+ journal_mark_dirty (&th, old_dir->i_sb, old_de.de_bh);
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
new_dir->i_ctime = new_dir->i_mtime = CURRENT_TIME;



-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:15    [W:0.023 / U:12.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site