linux-ext4 - [PATCH] e2fsprogs: Offsets of EAs in inode need not be sorted

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Date:	Thu, 19 Apr 2007 17:35:36 +0530
From:	Kalpak Shah <kalpak@...sterfs.com>
To:	TheodoreTso <tytso@....edu>
Cc:	linux-ext4 <linux-ext4@...r.kernel.org>
Subject: [PATCH] e2fsprogs: Offsets of EAs in inode need not be sorted

Hi,

This patch removes a code snippet from check_ea_in_inode() in pass1 which checks if the EA values in the inode are sorted or not. The comments in fs/ext*/xattr.c state that the EA values in the external EA block are sorted but those in the inode need not be sorted. I have also attached a test image which has unsorted EAs in the inodes. The current e2fsck wrongly clears the EAs in the inode.

Signed-off-by: Kalpak Shah <kalpak@...sterfs.com>

Index: e2fsprogs-1.40/e2fsck/pass1.c
===================================================================
--- e2fsprogs-1.40.orig/e2fsck/pass1.c
+++ e2fsprogs-1.40/e2fsck/pass1.c
@@ -246,7 +246,7 @@ static void check_ea_in_inode(e2fsck_t c
 	struct ext2_inode_large *inode;
 	struct ext2_ext_attr_entry *entry;
 	char *start, *end;
-	unsigned int storage_size, remain, offs;
+	unsigned int storage_size, remain;
 	int problem = 0;
 
 	inode = (struct ext2_inode_large *) pctx->inode;
@@ -261,7 +261,6 @@ static void check_ea_in_inode(e2fsck_t c
 
 	/* take finish entry 0UL into account */
 	remain = storage_size - sizeof(__u32); 
-	offs = end - start;
 
 	while (!EXT2_EXT_IS_LAST_ENTRY(entry)) {
 
@@ -285,15 +284,6 @@ static void check_ea_in_inode(e2fsck_t c
 			goto fix;
 		}
 
-		/* check value placement */
-		if (entry->e_value_offs + 
-		    EXT2_XATTR_SIZE(entry->e_value_size) != offs) {
-			printf("(entry->e_value_offs + entry->e_value_size: %d, offs: %d)\n", entry->e_value_offs + entry->e_value_size, offs);
-			pctx->num = entry->e_value_offs;
-			problem = PR_1_ATTR_VALUE_OFFSET;
-			goto fix;
-		}
-	
 		/* e_value_block must be 0 in inode's ea */
 		if (entry->e_value_block != 0) {
 			pctx->num = entry->e_value_block;
@@ -309,7 +299,6 @@ static void check_ea_in_inode(e2fsck_t c
 		}
 
 		remain -= entry->e_value_size;
-		offs -= EXT2_XATTR_SIZE(entry->e_value_size);
 
 		entry = EXT2_EXT_ATTR_NEXT(entry);
 	}

Thanks,
Kalpak Shah.
<kalpak@...sterfs.com>

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