| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Mon, 17 Mar 2008 09:28:38 -0400
From: Theodore Ts'o <tytso@....edu>
To: linux-ext4@...r.kernel.org
Cc: "Jose R. Santos" <jrs@...ibm.com>,
Andreas Dilger <adilger@...sterfs.com>,
"Theodore Ts'o" <tytso@....edu>
Subject: [PATCH, REWORKED 02/11] Add uninit block group support to various libext2fs functions
From: Jose R. Santos <jrs@...ibm.com>
Signed-off-by: Jose R. Santos <jrs@...ibm.com>
Signed-off-by: Andreas Dilger <adilger@...sterfs.com>
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
lib/ext2fs/Makefile.in | 10 ++++++----
lib/ext2fs/alloc_stats.c | 22 ++++++++++++++++++++++
lib/ext2fs/alloc_tables.c | 4 +---
lib/ext2fs/ext2fs.h | 3 ++-
lib/ext2fs/initialize.c | 1 +
lib/ext2fs/inode.c | 29 +++++++++++++++++++++++------
lib/ext2fs/openfs.c | 16 ++++++++++++++++
lib/ext2fs/rw_bitmaps.c | 12 ++++++++----
8 files changed, 79 insertions(+), 18 deletions(-)
diff --git a/lib/ext2fs/Makefile.in b/lib/ext2fs/Makefile.in
index f0f02dc..1de037d 100644
--- a/lib/ext2fs/Makefile.in
+++ b/lib/ext2fs/Makefile.in
@@ -195,11 +195,13 @@ ext2fs.pc: $(srcdir)/ext2fs.pc.in $(top_builddir)/config.status
@cd $(top_builddir); CONFIG_FILES=lib/ext2fs/ext2fs.pc ./config.status
tst_badblocks: tst_badblocks.o freefs.o bitmaps.o rw_bitmaps.o \
- read_bb_file.o write_bb_file.o badblocks.o
+ read_bb_file.o write_bb_file.o badblocks.o csum.o crc16.o \
+ closefs.o io_manager.o
@echo " LD $@"
- @$(CC) -o tst_badblocks tst_badblocks.o freefs.o \
- read_bb_file.o write_bb_file.o badblocks.o rw_bitmaps.o \
- inline.o bitops.o gen_bitmap.o bitmaps.o $(LIBCOM_ERR)
+ @$(CC) -o tst_badblocks tst_badblocks.o freefs.o read_bb_file.o \
+ write_bb_file.o badblocks.o rw_bitmaps.o inline.o bitops.o \
+ gen_bitmap.o bitmaps.o csum.o crc16.o closefs.o io_manager.o \
+ $(LIBCOM_ERR)
tst_icount: icount.c initialize.o $(STATIC_LIBEXT2FS)
@echo " LD $@"
diff --git a/lib/ext2fs/alloc_stats.c b/lib/ext2fs/alloc_stats.c
index 4088f7b..725f28d 100644
--- a/lib/ext2fs/alloc_stats.c
+++ b/lib/ext2fs/alloc_stats.c
@@ -27,6 +27,25 @@ void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
fs->group_desc[group].bg_free_inodes_count -= inuse;
if (isdir)
fs->group_desc[group].bg_used_dirs_count += inuse;
+
+ /* We don't strictly need to be clearing these if inuse < 0
+ * (i.e. freeing inodes) but it also means something is bad. */
+ fs->group_desc[group].bg_flags &= ~(EXT2_BG_INODE_UNINIT |
+ EXT2_BG_BLOCK_UNINIT);
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group -
+ fs->group_desc[group].bg_itable_unused +
+ group * fs->super->s_inodes_per_group + 1;
+
+ if (ino >= first_unused_inode)
+ fs->group_desc[group].bg_itable_unused =
+ group * fs->super->s_inodes_per_group +
+ fs->super->s_inodes_per_group - ino;
+
+ ext2fs_group_desc_csum_set(fs, group);
+ }
+
fs->super->s_free_inodes_count -= inuse;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_ib_dirty(fs);
@@ -46,6 +65,9 @@ void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse)
else
ext2fs_unmark_block_bitmap(fs->block_map, blk);
fs->group_desc[group].bg_free_blocks_count -= inuse;
+ fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
+ ext2fs_group_desc_csum_set(fs, group);
+
fs->super->s_free_blocks_count -= inuse;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
diff --git a/lib/ext2fs/alloc_tables.c b/lib/ext2fs/alloc_tables.c
index 4ad2ba9..9b4f0e5 100644
--- a/lib/ext2fs/alloc_tables.c
+++ b/lib/ext2fs/alloc_tables.c
@@ -95,13 +95,11 @@ errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
ext2fs_mark_block_bitmap(bmap, blk);
fs->group_desc[group].bg_inode_table = new_blk;
}
+ ext2fs_group_desc_csum_set(fs, group);
-
return 0;
}
-
-
errcode_t ext2fs_allocate_tables(ext2_filsys fs)
{
errcode_t retval;
diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index fbea854..0504a7f 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -516,7 +516,8 @@ typedef struct ext2_icount *ext2_icount_t;
EXT4_FEATURE_INCOMPAT_FLEX_BG)
#endif
#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
- EXT2_FEATURE_RO_COMPAT_LARGE_FILE)
+ EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)
/*
* These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
diff --git a/lib/ext2fs/initialize.c b/lib/ext2fs/initialize.c
index 2edcd17..c2e00e8 100644
--- a/lib/ext2fs/initialize.c
+++ b/lib/ext2fs/initialize.c
@@ -377,6 +377,7 @@ ipg_retry:
fs->group_desc[i].bg_free_inodes_count =
fs->super->s_inodes_per_group;
fs->group_desc[i].bg_used_dirs_count = 0;
+ ext2fs_group_desc_csum_set(fs, i);
}
c = (char) 255;
diff --git a/lib/ext2fs/inode.c b/lib/ext2fs/inode.c
index 818abc9..b4a445d 100644
--- a/lib/ext2fs/inode.c
+++ b/lib/ext2fs/inode.c
@@ -167,6 +167,9 @@ errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
if (EXT2_HAS_COMPAT_FEATURE(fs->super,
EXT2_FEATURE_COMPAT_LAZY_BG))
scan->scan_flags |= EXT2_SF_DO_LAZY;
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ scan->scan_flags |= EXT2_SF_DO_LAZY;
*ret_scan = scan;
return 0;
}
@@ -218,18 +221,30 @@ int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
*/
static errcode_t get_next_blockgroup(ext2_inode_scan scan)
{
+ ext2_filsys fs = scan->fs;
+
scan->current_group++;
scan->groups_left--;
-
- scan->current_block = scan->fs->
- group_desc[scan->current_group].bg_inode_table;
+
+ scan->current_block =fs->group_desc[scan->current_group].bg_inode_table;
scan->current_inode = scan->current_group *
- EXT2_INODES_PER_GROUP(scan->fs->super);
+ EXT2_INODES_PER_GROUP(fs->super);
scan->bytes_left = 0;
- scan->inodes_left = EXT2_INODES_PER_GROUP(scan->fs->super);
- scan->blocks_left = scan->fs->inode_blocks_per_group;
+ scan->inodes_left = EXT2_INODES_PER_GROUP(fs->super);
+ scan->blocks_left = fs->inode_blocks_per_group;
+ if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ scan->inodes_left -=
+ fs->group_desc[scan->current_group].bg_itable_unused;
+ scan->blocks_left =
+ (EXT2_INODES_PER_GROUP(fs->super) -
+ fs->group_desc[scan->current_group].bg_itable_unused +
+ fs->blocksize / scan->inode_size - 1) *
+ scan->inode_size / fs->blocksize;
+ }
+
return 0;
}
@@ -417,6 +432,8 @@ errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, ext2_ino_t *ino,
(scan->fs->group_desc[scan->current_group].bg_flags &
EXT2_BG_INODE_UNINIT))
goto force_new_group;
+ if (scan->inodes_left == 0)
+ goto force_new_group;
if (scan->current_block == 0) {
if (scan->scan_flags & EXT2_SF_SKIP_MISSING_ITABLE) {
goto force_new_group;
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index a6a8217..996fbb4 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -303,6 +303,22 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
fs->stride = fs->super->s_raid_stride;
+ /*
+ * If recovery is from backup superblock, Clear _UNININT flags &
+ * reset bg_itable_unused to zero
+ */
+ if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
+ struct ext2_group_desc *gd;
+ for (i = 0, gd = fs->group_desc; i < fs->group_desc_count;
+ i++, gd++) {
+ gd->bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
+ gd->bg_flags &= ~EXT2_BG_INODE_UNINIT;
+ gd->bg_itable_unused = 0;
+ }
+ ext2fs_mark_super_dirty(fs);
+ }
+
fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
*ret_fs = fs;
return 0;
diff --git a/lib/ext2fs/rw_bitmaps.c b/lib/ext2fs/rw_bitmaps.c
index 1897ec3..dd5dc46 100644
--- a/lib/ext2fs/rw_bitmaps.c
+++ b/lib/ext2fs/rw_bitmaps.c
@@ -152,8 +152,10 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
fs->write_bitmaps = ext2fs_write_bitmaps;
- if (EXT2_HAS_COMPAT_FEATURE(fs->super,
- EXT2_FEATURE_COMPAT_LAZY_BG))
+ if (EXT2_HAS_COMPAT_FEATURE(fs->super,
+ EXT2_FEATURE_COMPAT_LAZY_BG) ||
+ EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
lazy_flag = 1;
retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
@@ -233,7 +235,8 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
if (block_bitmap) {
blk = fs->group_desc[i].bg_block_bitmap;
if (lazy_flag && fs->group_desc[i].bg_flags &
- EXT2_BG_BLOCK_UNINIT)
+ EXT2_BG_BLOCK_UNINIT &&
+ ext2fs_group_desc_csum_verify(fs, i))
blk = 0;
if (blk) {
retval = io_channel_read_blk(fs->io, blk,
@@ -254,7 +257,8 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block)
if (inode_bitmap) {
blk = fs->group_desc[i].bg_inode_bitmap;
if (lazy_flag && fs->group_desc[i].bg_flags &
- EXT2_BG_INODE_UNINIT)
+ EXT2_BG_INODE_UNINIT &&
+ ext2fs_group_desc_csum_verify(fs, i))
blk = 0;
if (blk) {
retval = io_channel_read_blk(fs->io, blk,
--
1.5.4.1.144.gdfee-dirty
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists