add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/ubifs/tnc_commit.c
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@@ -1,20 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * This file is part of UBIFS.
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  *
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  * Copyright (C) 2006-2008 Nokia Corporation.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License version 2 as published by
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- * the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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- *
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- * You should have received a copy of the GNU General Public License along with
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- * this program; if not, write to the Free Software Foundation, Inc., 51
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- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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  *
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  * Authors: Adrian Hunter
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  *          Artem Bityutskiy (Битюцкий Артём)
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@@ -38,6 +26,7 @@
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 			 struct ubifs_znode *znode, int lnum, int offs, int len)
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 {
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 	struct ubifs_znode *zp;
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+	u8 hash[UBIFS_HASH_ARR_SZ];
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 	int i, err;
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 	/* Make index node */
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@@ -52,6 +41,7 @@
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 		br->lnum = cpu_to_le32(zbr->lnum);
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 		br->offs = cpu_to_le32(zbr->offs);
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 		br->len = cpu_to_le32(zbr->len);
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+		ubifs_copy_hash(c, zbr->hash, ubifs_branch_hash(c, br));
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 		if (!zbr->lnum || !zbr->len) {
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 			ubifs_err(c, "bad ref in znode");
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 			ubifs_dump_znode(c, znode);
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@@ -62,6 +52,7 @@
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 		}
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 	}
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 	ubifs_prepare_node(c, idx, len, 0);
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+	ubifs_node_calc_hash(c, idx, hash);
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 	znode->lnum = lnum;
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 	znode->offs = offs;
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@@ -78,10 +69,12 @@
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 		zbr->lnum = lnum;
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 		zbr->offs = offs;
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 		zbr->len = len;
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+		ubifs_copy_hash(c, hash, zbr->hash);
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 	} else {
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 		c->zroot.lnum = lnum;
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 		c->zroot.offs = offs;
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 		c->zroot.len = len;
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+		ubifs_copy_hash(c, hash, c->zroot.hash);
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 	}
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 	c->calc_idx_sz += ALIGN(len, 8);
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@@ -667,6 +660,8 @@
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 			znode->cnext = c->cnext;
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 			break;
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 		}
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+		znode->cparent = znode->parent;
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+		znode->ciip = znode->iip;
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 		znode->cnext = cnext;
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 		znode = cnext;
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 		cnt += 1;
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@@ -860,6 +855,8 @@
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 	}
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 	while (1) {
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+		u8 hash[UBIFS_HASH_ARR_SZ];
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+
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 		cond_resched();
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 		znode = cnext;
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@@ -877,6 +874,7 @@
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 			br->lnum = cpu_to_le32(zbr->lnum);
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 			br->offs = cpu_to_le32(zbr->offs);
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 			br->len = cpu_to_le32(zbr->len);
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+			ubifs_copy_hash(c, zbr->hash, ubifs_branch_hash(c, br));
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 			if (!zbr->lnum || !zbr->len) {
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 				ubifs_err(c, "bad ref in znode");
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 				ubifs_dump_znode(c, znode);
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@@ -888,6 +886,23 @@
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 		}
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 		len = ubifs_idx_node_sz(c, znode->child_cnt);
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 		ubifs_prepare_node(c, idx, len, 0);
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+		ubifs_node_calc_hash(c, idx, hash);
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+
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+		mutex_lock(&c->tnc_mutex);
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+
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+		if (znode->cparent)
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+			ubifs_copy_hash(c, hash,
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+					znode->cparent->zbranch[znode->ciip].hash);
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+
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+		if (znode->parent) {
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+			if (!ubifs_zn_obsolete(znode))
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+				ubifs_copy_hash(c, hash,
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+					znode->parent->zbranch[znode->iip].hash);
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+		} else {
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+			ubifs_copy_hash(c, hash, c->zroot.hash);
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+		}
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+		mutex_unlock(&c->tnc_mutex);
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 		/* Determine the index node position */
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 		if (lnum == -1) {