X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=ldiskfs%2Fkernel_patches%2Fpatches%2Frhel8.7%2Fext4-hash-indexed-dir-dotdot-update.patch;fp=ldiskfs%2Fkernel_patches%2Fpatches%2Frhel8.7%2Fext4-hash-indexed-dir-dotdot-update.patch;h=68d4aa2900095163a66988d45f69e62ae0a1d895;hb=0536b2a26992f5d2ef9e3537a196afac81281f60;hp=0000000000000000000000000000000000000000;hpb=9d9b8cbaa4123df708a072acd1a4f30120075418;p=fs%2Flustre-release.git

diff --git a/ldiskfs/kernel_patches/patches/rhel8.7/ext4-hash-indexed-dir-dotdot-update.patch b/ldiskfs/kernel_patches/patches/rhel8.7/ext4-hash-indexed-dir-dotdot-update.patch
new file mode 100644
index 0000000..68d4aa2
--- /dev/null
+++ b/ldiskfs/kernel_patches/patches/rhel8.7/ext4-hash-indexed-dir-dotdot-update.patch
@@ -0,0 +1,83 @@
+Index: linux-4.15.0/fs/ext4/namei.c
+===================================================================
+--- linux-4.15.0.orig/fs/ext4/namei.c
++++ linux-4.15.0/fs/ext4/namei.c
+@@ -2043,6 +2043,67 @@ out_frames:
+ 	return retval;
+ }
+ 
++/* update ".." entry */
++static int ext4_update_dotdot(handle_t *handle, struct dentry *dentry,
++			      struct inode *inode)
++{
++	struct inode *dir = dentry->d_parent->d_inode;
++	struct buffer_head *bh;
++	struct ext4_dir_entry_2 *dot_de, *dotdot_de;
++	unsigned int offset;
++	int retval = 0;
++
++	if (IS_ERR(handle))
++		return PTR_ERR(handle);
++
++	if (IS_DIRSYNC(dir))
++		handle->h_sync = 1;
++
++	bh = ext4_read_dirblock(dir, 0, DIRENT_HTREE);
++	if (IS_ERR(bh))
++		return PTR_ERR(bh);
++
++	dot_de = (struct ext4_dir_entry_2 *) bh->b_data;
++	if (ext4_check_dir_entry(dir, NULL, dot_de, bh, bh->b_data,
++				 bh->b_size, 0) ||
++	    le32_to_cpu(dot_de->inode) != dir->i_ino ||
++	    strcmp(".", dot_de->name)) {
++		EXT4_ERROR_INODE(dir, "directory missing '.'");
++		retval = -EFSCORRUPTED;
++		goto out;
++	}
++	offset = ext4_rec_len_from_disk(dot_de->rec_len,
++					dir->i_sb->s_blocksize);
++	dotdot_de = ext4_next_entry(dot_de, dir->i_sb->s_blocksize);
++	if (ext4_check_dir_entry(dir, NULL, dotdot_de, bh, bh->b_data,
++				 bh->b_size, offset) ||
++	    le32_to_cpu(dotdot_de->inode) == 0 ||
++	    strcmp("..", dotdot_de->name)) {
++		EXT4_ERROR_INODE(dir, "directory missing '..'");
++		retval = -EFSCORRUPTED;
++		goto out;
++	}
++
++	BUFFER_TRACE(dir_block, "get_write_access");
++	retval = ext4_journal_get_write_access(handle, bh);
++	if (retval)
++		goto out;
++
++	dotdot_de->inode = cpu_to_le32(inode->i_ino);
++
++	ext4_mark_inode_dirty(handle, dir);
++	BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
++	if (is_dx(dir)) {
++		retval = ext4_handle_dirty_dx_node(handle, dir, bh);
++	} else {
++		retval = ext4_handle_dirty_dirent_node(handle, dir, bh);
++	}
++
++out:
++	brelse(bh);
++	return retval;
++}
++
+ /*
+  *	ext4_add_entry()
+  *
+@@ -2090,6 +2158,10 @@ static int ext4_add_entry(handle_t *hand
+ 		}
+ 	}
+ 
++	if (dentry->d_name.len == 2 &&
++			memcmp(dentry->d_name.name, "..", 2) == 0)
++		return ext4_update_dotdot(handle, dentry, inode);
++
+ 	if (is_dx(dir)) {
+ 		retval = ext4_dx_add_entry(handle, &fname, dir, inode);
+ 		if (!retval || (retval != ERR_BAD_DX_DIR))