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Date: Wed, 25 Jan 2017 20:20:42 +0300
From: Artem Blagodarenko <artem.blagodarenko@...gate.com>
To: linux-ext4@...r.kernel.org
Subject: [PATCH 1/3 v2] e2fsprogs: add support for 3-level htree
Hello,
Darrick J. Wong, thank you for inspection. Here is second version of the patch.
Changes since v1
* Part that removes dir_acl moved to separate patch "e2fsprogs:
supersede i_dir_acl with i_size_high for all cases"
The INCOMPAT_LARGEDIR feature allows larger directories to
be created, both with directory sizes over 2GB and and a
maximum htree depth of 3 instead of the current limit of 2.
These features are needed in order to exceed the currently
limit of approximately 10M entries in a single directory.
debugfs, e2fsck, ext2fs, mke2fs and tune2fs support is
added.
This patch depends on "e2fsprogs: supersede i_dir_acl with i_size_high
for all cases"
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@...gate.com>
Signed-off-by: Artem Blagodarenko <artem.blagodarenko@...gate.com>
---
e2fsck/pass1.c | 2 +-
e2fsck/pass2.c | 3 ++-
lib/ext2fs/ext2_fs.h | 3 ++-
lib/ext2fs/ext2fs.h | 15 ++++++++++++++-
misc/mke2fs.c | 3 ++-
misc/tune2fs.c | 3 ++-
6 files changed, 23 insertions(+), 6 deletions(-)
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 2d21aae..8444b37 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -2468,7 +2468,7 @@ static int handle_htree(e2fsck_t ctx, struct
problem_context *pctx,
return 1;
pctx->num = root->indirect_levels;
- if ((root->indirect_levels > 1) &&
+ if ((root->indirect_levels > ext2_dir_htree_level(fs)) &&
fix_problem(ctx, PR_1_HTREE_DEPTH, pctx))
return 1;
diff --git a/e2fsck/pass2.c b/e2fsck/pass2.c
index 3b141db..7ded7bb 100644
--- a/e2fsck/pass2.c
+++ b/e2fsck/pass2.c
@@ -1058,7 +1058,8 @@ inline_read_fail:
dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
if ((root->reserved_zero ||
root->info_length < 8 ||
- root->indirect_levels > 1) &&
+ root->indirect_levels
+ > ext2_dir_htree_level(fs)) &&
fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
clear_htree(ctx, ino);
dx_dir->numblocks = 0;
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index 195e366..6d9a5d0 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -921,7 +921,8 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, 4, ENCRYPT)
#define EXT2_FEATURE_COMPAT_SUPP 0
#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
- EXT4_FEATURE_INCOMPAT_MMP)
+ EXT4_FEATURE_INCOMPAT_MMP|\
+ EXT4_FEATURE_INCOMPAT_LARGEDIR)
#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_DIR_NLINK| \
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index 786ded8..5e956d0 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -588,7 +588,8 @@ typedef struct ext2_icount *ext2_icount_t;
EXT4_FEATURE_INCOMPAT_64BIT|\
EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
EXT4_FEATURE_INCOMPAT_ENCRYPT|\
- EXT4_FEATURE_INCOMPAT_CSUM_SEED)
+ EXT4_FEATURE_INCOMPAT_CSUM_SEED|\
+ EXT4_FEATURE_INCOMPAT_LARGEDIR)
#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP
(EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
@@ -1924,6 +1925,18 @@ _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
}
+/* htree levels for ext4 */
+#define EXT4_HTREE_LEVEL_COMPAT 1
+#define EXT4_HTREE_LEVEL 3
+
+_INLINE_ unsigned int ext2_dir_htree_level(ext2_filsys fs)
+{
+ if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_INCOMPAT_LARGEDIR))
+ return EXT4_HTREE_LEVEL;
+ return EXT4_HTREE_LEVEL_COMPAT;
+}
+
/*
* This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
*/
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 9f18c83..b2bf461 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1081,7 +1081,8 @@ static __u32 ok_features[3] = {
EXT4_FEATURE_INCOMPAT_64BIT|
EXT4_FEATURE_INCOMPAT_INLINE_DATA|
EXT4_FEATURE_INCOMPAT_ENCRYPT |
- EXT4_FEATURE_INCOMPAT_CSUM_SEED,
+ EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+ EXT4_FEATURE_INCOMPAT_LARGEDIR,
/* R/O compat */
EXT2_FEATURE_RO_COMPAT_LARGE_FILE|
EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 6239577..f78d105 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -156,7 +156,8 @@ static __u32 ok_features[3] = {
EXT4_FEATURE_INCOMPAT_MMP |
EXT4_FEATURE_INCOMPAT_64BIT |
EXT4_FEATURE_INCOMPAT_ENCRYPT |
- EXT4_FEATURE_INCOMPAT_CSUM_SEED,
+ EXT4_FEATURE_INCOMPAT_CSUM_SEED |
+ EXT4_FEATURE_INCOMPAT_LARGEDIR,
/* R/O compat */
EXT2_FEATURE_RO_COMPAT_LARGE_FILE |
EXT4_FEATURE_RO_COMPAT_HUGE_FILE|
--
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