[3.13.y.z extended stable] Patch "ext4: Replace open coded mdata csum feature to helper function" has been added to staging queue
Kamal Mostafa
kamal at canonical.com
Fri Oct 31 20:53:37 UTC 2014
This is a note to let you know that I have just added a patch titled
ext4: Replace open coded mdata csum feature to helper function
to the linux-3.13.y-queue branch of the 3.13.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue
This patch is scheduled to be released in version 3.13.11.11.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.13.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From 261e46f462bfbd28cd07a02d07e7158a0f242b19 Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmonakhov at openvz.org>
Date: Mon, 13 Oct 2014 03:36:16 -0400
Subject: ext4: Replace open coded mdata csum feature to helper function
commit 9aa5d32ba269bec0e7eaba2697a986a7b0bc8528 upstream.
Besides the fact that this replacement improves code readability
it also protects from errors caused direct EXT4_S(sb)->s_es manipulation
which may result attempt to use uninitialized csum machinery.
IMG=/dev/ram0
MNT=/mnt
mkfs.ext4 $IMG
mount $IMG $MNT
tune2fs -O metadata_csum $IMG
touch $MNT/test
umount $MNT
@@
expression E;
@@
- EXT4_HAS_RO_COMPAT_FEATURE(E, EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)
+ ext4_has_metadata_csum(E)
https://bugzilla.kernel.org/show_bug.cgi?id=82201
Signed-off-by: Dmitry Monakhov <dmonakhov at openvz.org>
Signed-off-by: Theodore Ts'o <tytso at mit.edu>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
fs/ext4/bitmap.c | 12 ++++--------
fs/ext4/ext4.h | 8 ++++++++
fs/ext4/extents.c | 6 ++----
fs/ext4/ialloc.c | 3 +--
fs/ext4/inline.c | 3 +--
fs/ext4/inode.c | 9 +++------
fs/ext4/ioctl.c | 3 +--
fs/ext4/mmp.c | 6 ++----
fs/ext4/namei.c | 39 +++++++++++++--------------------------
fs/ext4/resize.c | 3 +--
fs/ext4/super.c | 15 +++++----------
fs/ext4/xattr.c | 6 ++----
12 files changed, 43 insertions(+), 70 deletions(-)
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index 3285aa5..b610779 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -24,8 +24,7 @@ int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
__u32 provided, calculated;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 1;
provided = le16_to_cpu(gdp->bg_inode_bitmap_csum_lo);
@@ -46,8 +45,7 @@ void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
__u32 csum;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return;
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
@@ -65,8 +63,7 @@ int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
struct ext4_sb_info *sbi = EXT4_SB(sb);
int sz = EXT4_CLUSTERS_PER_GROUP(sb) / 8;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 1;
provided = le16_to_cpu(gdp->bg_block_bitmap_csum_lo);
@@ -91,8 +88,7 @@ void ext4_block_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
__u32 csum;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return;
csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)bh->b_data, sz);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c9d0794..0e9930f 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2345,6 +2345,14 @@ static inline int ext4_has_group_desc_csum(struct super_block *sb)
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM);
}
+static inline int ext4_has_metadata_csum(struct super_block *sb)
+{
+ WARN_ON_ONCE(EXT4_HAS_RO_COMPAT_FEATURE(sb,
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
+ !EXT4_SB(sb)->s_chksum_driver);
+
+ return (EXT4_SB(sb)->s_chksum_driver != NULL);
+}
static inline ext4_fsblk_t ext4_blocks_count(struct ext4_super_block *es)
{
return ((ext4_fsblk_t)le32_to_cpu(es->s_blocks_count_hi) << 32) |
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 3a09bb7..da05fe2 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -74,8 +74,7 @@ static int ext4_extent_block_csum_verify(struct inode *inode,
{
struct ext4_extent_tail *et;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
et = find_ext4_extent_tail(eh);
@@ -89,8 +88,7 @@ static void ext4_extent_block_csum_set(struct inode *inode,
{
struct ext4_extent_tail *et;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return;
et = find_ext4_extent_tail(eh);
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 64bb32f1..158ddf6 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -988,8 +988,7 @@ got:
spin_unlock(&sbi->s_next_gen_lock);
/* Precompute checksum seed for inode metadata */
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (ext4_has_metadata_csum(sb)) {
__u32 csum;
__le32 inum = cpu_to_le32(inode->i_ino);
__le32 gen = cpu_to_le32(inode->i_generation);
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 7f03208..3af1fc4 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1124,8 +1124,7 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
memcpy((void *)de, buf + EXT4_INLINE_DOTDOT_SIZE,
inline_size - EXT4_INLINE_DOTDOT_SIZE);
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
inode->i_size = inode->i_sb->s_blocksize;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 37a8c8b..f2a02dd 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -83,8 +83,7 @@ static int ext4_inode_csum_verify(struct inode *inode, struct ext4_inode *raw,
if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
cpu_to_le32(EXT4_OS_LINUX) ||
- !EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ !ext4_has_metadata_csum(inode->i_sb))
return 1;
provided = le16_to_cpu(raw->i_checksum_lo);
@@ -105,8 +104,7 @@ static void ext4_inode_csum_set(struct inode *inode, struct ext4_inode *raw,
if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
cpu_to_le32(EXT4_OS_LINUX) ||
- !EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ !ext4_has_metadata_csum(inode->i_sb))
return;
csum = ext4_inode_csum(inode, raw, ei);
@@ -4086,8 +4084,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
ei->i_extra_isize = 0;
/* Precompute checksum seed for inode metadata */
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (ext4_has_metadata_csum(sb)) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
__u32 csum;
__le32 inum = cpu_to_le32(inode->i_ino);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 2c3541b..fdcadc9 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -347,8 +347,7 @@ flags_out:
if (!inode_owner_or_capable(inode))
return -EPERM;
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (ext4_has_metadata_csum(inode->i_sb)) {
ext4_warning(sb, "Setting inode version is not "
"supported with metadata_csum enabled.");
return -ENOTTY;
diff --git a/fs/ext4/mmp.c b/fs/ext4/mmp.c
index 04434ad..1268a1b 100644
--- a/fs/ext4/mmp.c
+++ b/fs/ext4/mmp.c
@@ -20,8 +20,7 @@ static __le32 ext4_mmp_csum(struct super_block *sb, struct mmp_struct *mmp)
int ext4_mmp_csum_verify(struct super_block *sb, struct mmp_struct *mmp)
{
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 1;
return mmp->mmp_checksum == ext4_mmp_csum(sb, mmp);
@@ -29,8 +28,7 @@ int ext4_mmp_csum_verify(struct super_block *sb, struct mmp_struct *mmp)
void ext4_mmp_csum_set(struct super_block *sb, struct mmp_struct *mmp)
{
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return;
mmp->mmp_checksum = ext4_mmp_csum(sb, mmp);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 5bfbf94..08de398 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -123,8 +123,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
"directory leaf block found instead of index block");
return ERR_PTR(-EIO);
}
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) ||
+ if (!ext4_has_metadata_csum(inode->i_sb) ||
buffer_verified(bh))
return bh;
@@ -339,8 +338,7 @@ int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
{
struct ext4_dir_entry_tail *t;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
t = get_dirent_tail(inode, dirent);
@@ -361,8 +359,7 @@ static void ext4_dirent_csum_set(struct inode *inode,
{
struct ext4_dir_entry_tail *t;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return;
t = get_dirent_tail(inode, dirent);
@@ -437,8 +434,7 @@ static int ext4_dx_csum_verify(struct inode *inode,
struct dx_tail *t;
int count_offset, limit, count;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return 1;
c = get_dx_countlimit(inode, dirent, &count_offset);
@@ -467,8 +463,7 @@ static void ext4_dx_csum_set(struct inode *inode, struct ext4_dir_entry *dirent)
struct dx_tail *t;
int count_offset, limit, count;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return;
c = get_dx_countlimit(inode, dirent, &count_offset);
@@ -556,8 +551,7 @@ static inline unsigned dx_root_limit(struct inode *dir, unsigned infosize)
unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(1) -
EXT4_DIR_REC_LEN(2) - infosize;
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
return entry_space / sizeof(struct dx_entry);
}
@@ -566,8 +560,7 @@ static inline unsigned dx_node_limit(struct inode *dir)
{
unsigned entry_space = dir->i_sb->s_blocksize - EXT4_DIR_REC_LEN(0);
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(dir->i_sb))
entry_space -= sizeof(struct dx_tail);
return entry_space / sizeof(struct dx_entry);
}
@@ -1535,8 +1528,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
int csum_size = 0;
int err = 0, i;
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
bh2 = ext4_append(handle, dir, &newblock);
@@ -1705,8 +1697,7 @@ static int add_dirent_to_buf(handle_t *handle, struct dentry *dentry,
int csum_size = 0;
int err;
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
if (!de) {
@@ -1773,8 +1764,7 @@ static int make_indexed_dir(handle_t *handle, struct dentry *dentry,
struct fake_dirent *fde;
int csum_size = 0;
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
blocksize = dir->i_sb->s_blocksize;
@@ -1890,8 +1880,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
ext4_lblk_t block, blocks;
int csum_size = 0;
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(inode->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
sb = dir->i_sb;
@@ -2153,8 +2142,7 @@ static int ext4_delete_entry(handle_t *handle,
return err;
}
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
BUFFER_TRACE(bh, "get_write_access");
@@ -2373,8 +2361,7 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
int csum_size = 0;
int err;
- if (EXT4_HAS_RO_COMPAT_FEATURE(dir->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(dir->i_sb))
csum_size = sizeof(struct ext4_dir_entry_tail);
if (ext4_test_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA)) {
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index f3b84cd..14e0f8a 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1200,8 +1200,7 @@ static int ext4_set_bitmap_checksums(struct super_block *sb,
{
struct buffer_head *bh;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 0;
bh = ext4_get_bitmap(sb, group_data->inode_bitmap);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c888f23..6686ce4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -140,8 +140,7 @@ static __le32 ext4_superblock_csum(struct super_block *sb,
int ext4_superblock_csum_verify(struct super_block *sb,
struct ext4_super_block *es)
{
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return 1;
return es->s_checksum == ext4_superblock_csum(sb, es);
@@ -151,8 +150,7 @@ void ext4_superblock_csum_set(struct super_block *sb)
{
struct ext4_super_block *es = EXT4_SB(sb)->s_es;
- if (!EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(sb))
return;
es->s_checksum = ext4_superblock_csum(sb, es);
@@ -2003,8 +2001,7 @@ static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group,
__u16 crc = 0;
__le32 le_group = cpu_to_le32(block_group);
- if ((sbi->s_es->s_feature_ro_compat &
- cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) {
+ if (ext4_has_metadata_csum(sbi->s_sb)) {
/* Use new metadata_csum algorithm */
__le16 save_csum;
__u32 csum32;
@@ -3160,8 +3157,7 @@ static int set_journal_csum_feature_set(struct super_block *sb)
int compat, incompat;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) {
+ if (ext4_has_metadata_csum(sb)) {
/* journal checksum v3 */
compat = 0;
incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3;
@@ -3468,8 +3464,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
}
/* Precompute checksum seed for all metadata */
- if (EXT4_HAS_RO_COMPAT_FEATURE(sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (ext4_has_metadata_csum(sb))
sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid,
sizeof(es->s_uuid));
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index a20816e..a5d2f1b 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -141,8 +141,7 @@ static int ext4_xattr_block_csum_verify(struct inode *inode,
sector_t block_nr,
struct ext4_xattr_header *hdr)
{
- if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
+ if (ext4_has_metadata_csum(inode->i_sb) &&
(hdr->h_checksum != ext4_xattr_block_csum(inode, block_nr, hdr)))
return 0;
return 1;
@@ -152,8 +151,7 @@ static void ext4_xattr_block_csum_set(struct inode *inode,
sector_t block_nr,
struct ext4_xattr_header *hdr)
{
- if (!EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb,
- EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
+ if (!ext4_has_metadata_csum(inode->i_sb))
return;
hdr->h_checksum = ext4_xattr_block_csum(inode, block_nr, hdr);
--
1.9.1
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