From: Robin Dong <sanbai@xxxxxxxxxx>
After creating more than 1000 files in root directory on ext4 of bigalloc,
the kernel reports many error messages like:
[181126.730911] EXT4-fs error (device sda4): ext4_ind_map_blocks:1015: inode #2: comm falloc: Can't allocate blocks for non-extent mapped inodes with bigalloc
[181126.735945] EXT4-fs error (device sda4): ext4_ind_map_blocks:1015: inode #2: comm falloc: Can't allocate blocks for non-extent mapped inodes with bigalloc
because the root inode of a new ext4 filesystem is type of block-mapped
even use mke2fs with "-O extent,bigalloc".
So change root inode to extent-mapped when do "mke2fs" if the option has "extent".
Signed-off-by: Robin Dong <sanbai@xxxxxxxxxx>
Cc: Ted Ts'o <tytso@xxxxxxx>
---
lib/ext2fs/mkdir.c | 21 ++++++++++++++++++++-
1 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/lib/ext2fs/mkdir.c b/lib/ext2fs/mkdir.c
index 86c65da..d4b8d37 100644
--- a/lib/ext2fs/mkdir.c
+++ b/lib/ext2fs/mkdir.c
@@ -39,6 +39,9 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
ext2_ino_t scratch_ino;
blk64_t blk;
char *block = 0;
+ int max;
+ struct ext3_extent *ex;
+ struct ext3_extent_header *eh;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
@@ -84,7 +87,23 @@ errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
inode.i_uid = inode.i_gid = 0;
ext2fs_iblk_set(fs, &inode, 1);
/* FIXME-64 */
- inode.i_block[0] = blk;
+ if (fs->super->s_feature_incompat &
+ EXT3_FEATURE_INCOMPAT_EXTENTS) {
+ eh = (struct ext3_extent_header *) &inode.i_block[0];
+ eh->eh_depth = 0;
+ eh->eh_entries = 1;
+ eh->eh_magic = ext2fs_cpu_to_le16(EXT3_EXT_MAGIC);
+ max = (sizeof(inode.i_block) - sizeof(*eh)) /
+ sizeof(struct ext3_extent);
+ eh->eh_max = ext2fs_cpu_to_le16(max);
+ ex = EXT_FIRST_EXTENT(eh);
+ ex->ee_block = 0;
+ ex->ee_start = ext2fs_cpu_to_le32(blk & 0xFFFFFFFF);
+ ex->ee_start_hi = ext2fs_cpu_to_le16(blk >> 32);
+ ex->ee_len = 1;
+ inode.i_flags |= EXT4_EXTENTS_FL;
+ } else
+ inode.i_block[0] = blk;
inode.i_links_count = 2;
inode.i_size = fs->blocksize;
--
1.7.3.2
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