ext4: do not use ext4_error() when there is no space in dir leaf for csum

If there is no space for a checksum in a directory leaf node,
previously we would use EXT4_ERROR_INODE() which would mark the file
system as inconsistent.  While it would be nice to use e2fsck -D, it
certainly isn't required, so just print a warning using
ext4_warning().
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: "Darrick J. Wong" <darrick.wong@oracle.com>

fs/ext4/namei.c

@@ -261,6 +261,12 @@ static __le32 ext4_dirent_csum(struct inode *inode,
 	return cpu_to_le32(csum);
 }
 
+static void warn_no_space_for_csum(struct inode *inode)
+{
+	ext4_warning(inode->i_sb, "no space in directory inode %lu leaf for "
+		     "checksum.  Please run e2fsck -D.", inode->i_ino);
+}
+
 int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
 {
 	struct ext4_dir_entry_tail *t;
@@ -271,8 +277,7 @@ int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
 
 	t = get_dirent_tail(inode, dirent);
 	if (!t) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
-				 "leaf for checksum.  Please run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return 0;
 	}
 
@@ -294,8 +299,7 @@ static void ext4_dirent_csum_set(struct inode *inode,
 
 	t = get_dirent_tail(inode, dirent);
 	if (!t) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space in dir "
-				 "leaf for checksum.  Please run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return;
 	}
 
@@ -377,8 +381,7 @@ static int ext4_dx_csum_verify(struct inode *inode,
 	count = le16_to_cpu(c->count);
 	if (count_offset + (limit * sizeof(struct dx_entry)) >
 	    EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
-				 "tree checksum found.  Run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return 1;
 	}
 	t = (struct dx_tail *)(((struct dx_entry *)c) + limit);
@@ -408,8 +411,7 @@ static void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent)
 	count = le16_to_cpu(c->count);
 	if (count_offset + (limit * sizeof(struct dx_entry)) >
 	    EXT4_BLOCK_SIZE(inode->i_sb) - sizeof(struct dx_tail)) {
-		EXT4_ERROR_INODE(inode, "metadata_csum set but no space for "
-				 "tree checksum.  Run e2fsck -D.");
+		warn_no_space_for_csum(inode);
 		return;
 	}
 	t = (struct dx_tail *)(((struct dx_entry *)c) + limit);