From: Zhang Yi
maillist inclusion
category: bugfix
issue: #I4NRS5
CVE: NA
Signed-off-by: Yu Changchun
---------------------------
In preparation for calling ext4_fill_raw_inode() in
__ext4_get_inode_loc(), move three related functions before
__ext4_get_inode_loc(), no logical change.
Signed-off-by: Zhang Yi
Reviewed-by: Yang Erkun
Signed-off-by: Chen Jun
Signed-off-by: Zheng Zengkai
Signed-off-by: Yu Changchun
---
fs/ext4/inode.c | 293 ++++++++++++++++++++++++------------------------
1 file changed, 147 insertions(+), 146 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index cbc811ec1ef9..1eefbc464964 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4303,6 +4303,153 @@ int ext4_truncate(struct inode *inode)
return err;
}
+static inline u64 ext4_inode_peek_iversion(const struct inode *inode)
+{
+ if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL))
+ return inode_peek_iversion_raw(inode);
+ else
+ return inode_peek_iversion(inode);
+}
+
+static int ext4_inode_blocks_set(struct ext4_inode *raw_inode,
+ struct ext4_inode_info *ei)
+{
+ struct inode *inode = &(ei->vfs_inode);
+ u64 i_blocks = READ_ONCE(inode->i_blocks);
+ struct super_block *sb = inode->i_sb;
+
+ if (i_blocks <= ~0U) {
+ /*
+ * i_blocks can be represented in a 32 bit variable
+ * as multiple of 512 bytes
+ */
+ raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
+ raw_inode->i_blocks_high = 0;
+ ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
+ return 0;
+ }
+
+ /*
+ * This should never happen since sb->s_maxbytes should not have
+ * allowed this, sb->s_maxbytes was set according to the huge_file
+ * feature in ext4_fill_super().
+ */
+ if (!ext4_has_feature_huge_file(sb))
+ return -EFSCORRUPTED;
+
+ if (i_blocks <= 0xffffffffffffULL) {
+ /*
+ * i_blocks can be represented in a 48 bit variable
+ * as multiple of 512 bytes
+ */
+ raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
+ raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
+ ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
+ } else {
+ ext4_set_inode_flag(inode, EXT4_INODE_HUGE_FILE);
+ /* i_block is stored in file system block size */
+ i_blocks = i_blocks >> (inode->i_blkbits - 9);
+ raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
+ raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
+ }
+ return 0;
+}
+
+static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode)
+{
+ struct ext4_inode_info *ei = EXT4_I(inode);
+ uid_t i_uid;
+ gid_t i_gid;
+ projid_t i_projid;
+ int block;
+ int err;
+
+ err = ext4_inode_blocks_set(raw_inode, ei);
+
+ raw_inode->i_mode = cpu_to_le16(inode->i_mode);
+ i_uid = i_uid_read(inode);
+ i_gid = i_gid_read(inode);
+ i_projid = from_kprojid(&init_user_ns, ei->i_projid);
+ if (!(test_opt(inode->i_sb, NO_UID32))) {
+ raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
+ /*
+ * Fix up interoperability with old kernels. Otherwise,
+ * old inodes get re-used with the upper 16 bits of the
+ * uid/gid intact.
+ */
+ if (ei->i_dtime && list_empty(&ei->i_orphan)) {
+ raw_inode->i_uid_high = 0;
+ raw_inode->i_gid_high = 0;
+ } else {
+ raw_inode->i_uid_high =
+ cpu_to_le16(high_16_bits(i_uid));
+ raw_inode->i_gid_high =
+ cpu_to_le16(high_16_bits(i_gid));
+ }
+ } else {
+ raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
+ raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
+ raw_inode->i_uid_high = 0;
+ raw_inode->i_gid_high = 0;
+ }
+ raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
+
+ EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
+ EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
+ EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
+ EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
+
+ raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
+ raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
+ if (likely(!test_opt2(inode->i_sb, HURD_COMPAT)))
+ raw_inode->i_file_acl_high =
+ cpu_to_le16(ei->i_file_acl >> 32);
+ raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
+ ext4_isize_set(raw_inode, ei->i_disksize);
+
+ raw_inode->i_generation = cpu_to_le32(inode->i_generation);
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ if (old_valid_dev(inode->i_rdev)) {
+ raw_inode->i_block[0] =
+ cpu_to_le32(old_encode_dev(inode->i_rdev));
+ raw_inode->i_block[1] = 0;
+ } else {
+ raw_inode->i_block[0] = 0;
+ raw_inode->i_block[1] =
+ cpu_to_le32(new_encode_dev(inode->i_rdev));
+ raw_inode->i_block[2] = 0;
+ }
+ } else if (!ext4_has_inline_data(inode)) {
+ for (block = 0; block < EXT4_N_BLOCKS; block++)
+ raw_inode->i_block[block] = ei->i_data[block];
+ }
+
+ if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
+ u64 ivers = ext4_inode_peek_iversion(inode);
+
+ raw_inode->i_disk_version = cpu_to_le32(ivers);
+ if (ei->i_extra_isize) {
+ if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
+ raw_inode->i_version_hi =
+ cpu_to_le32(ivers >> 32);
+ raw_inode->i_extra_isize =
+ cpu_to_le16(ei->i_extra_isize);
+ }
+ }
+
+ if (i_projid != EXT4_DEF_PROJID &&
+ !ext4_has_feature_project(inode->i_sb))
+ err = err ?: -EFSCORRUPTED;
+
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
+ EXT4_FITS_IN_INODE(raw_inode, ei, i_projid))
+ raw_inode->i_projid = cpu_to_le32(i_projid);
+
+ ext4_inode_csum_set(inode, raw_inode, ei);
+ return err;
+}
+
/*
* ext4_get_inode_loc returns with an extra refcount against the inode's
* underlying buffer_head on success. If 'in_mem' is true, we have all
@@ -4597,13 +4744,6 @@ static inline void ext4_inode_set_iversion_queried(struct inode *inode, u64 val)
else
inode_set_iversion_queried(inode, val);
}
-static inline u64 ext4_inode_peek_iversion(const struct inode *inode)
-{
- if (unlikely(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL))
- return inode_peek_iversion_raw(inode);
- else
- return inode_peek_iversion(inode);
-}
struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
ext4_iget_flags flags, const char *function,
@@ -4919,50 +5059,6 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
return ERR_PTR(ret);
}
-static int ext4_inode_blocks_set(struct ext4_inode *raw_inode,
- struct ext4_inode_info *ei)
-{
- struct inode *inode = &(ei->vfs_inode);
- u64 i_blocks = READ_ONCE(inode->i_blocks);
- struct super_block *sb = inode->i_sb;
-
- if (i_blocks <= ~0U) {
- /*
- * i_blocks can be represented in a 32 bit variable
- * as multiple of 512 bytes
- */
- raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
- raw_inode->i_blocks_high = 0;
- ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
- return 0;
- }
-
- /*
- * This should never happen since sb->s_maxbytes should not have
- * allowed this, sb->s_maxbytes was set according to the huge_file
- * feature in ext4_fill_super().
- */
- if (!ext4_has_feature_huge_file(sb))
- return -EFSCORRUPTED;
-
- if (i_blocks <= 0xffffffffffffULL) {
- /*
- * i_blocks can be represented in a 48 bit variable
- * as multiple of 512 bytes
- */
- raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
- raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
- ext4_clear_inode_flag(inode, EXT4_INODE_HUGE_FILE);
- } else {
- ext4_set_inode_flag(inode, EXT4_INODE_HUGE_FILE);
- /* i_block is stored in file system block size */
- i_blocks = i_blocks >> (inode->i_blkbits - 9);
- raw_inode->i_blocks_lo = cpu_to_le32(i_blocks);
- raw_inode->i_blocks_high = cpu_to_le16(i_blocks >> 32);
- }
- return 0;
-}
-
static void __ext4_update_other_inode_time(struct super_block *sb,
unsigned long orig_ino,
unsigned long ino,
@@ -5027,101 +5123,6 @@ static void ext4_update_other_inodes_time(struct super_block *sb,
rcu_read_unlock();
}
-static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode)
-{
- struct ext4_inode_info *ei = EXT4_I(inode);
- uid_t i_uid;
- gid_t i_gid;
- projid_t i_projid;
- int block;
- int err;
-
- err = ext4_inode_blocks_set(raw_inode, ei);
-
- raw_inode->i_mode = cpu_to_le16(inode->i_mode);
- i_uid = i_uid_read(inode);
- i_gid = i_gid_read(inode);
- i_projid = from_kprojid(&init_user_ns, ei->i_projid);
- if (!(test_opt(inode->i_sb, NO_UID32))) {
- raw_inode->i_uid_low = cpu_to_le16(low_16_bits(i_uid));
- raw_inode->i_gid_low = cpu_to_le16(low_16_bits(i_gid));
- /*
- * Fix up interoperability with old kernels. Otherwise,
- * old inodes get re-used with the upper 16 bits of the
- * uid/gid intact.
- */
- if (ei->i_dtime && list_empty(&ei->i_orphan)) {
- raw_inode->i_uid_high = 0;
- raw_inode->i_gid_high = 0;
- } else {
- raw_inode->i_uid_high =
- cpu_to_le16(high_16_bits(i_uid));
- raw_inode->i_gid_high =
- cpu_to_le16(high_16_bits(i_gid));
- }
- } else {
- raw_inode->i_uid_low = cpu_to_le16(fs_high2lowuid(i_uid));
- raw_inode->i_gid_low = cpu_to_le16(fs_high2lowgid(i_gid));
- raw_inode->i_uid_high = 0;
- raw_inode->i_gid_high = 0;
- }
- raw_inode->i_links_count = cpu_to_le16(inode->i_nlink);
-
- EXT4_INODE_SET_XTIME(i_ctime, inode, raw_inode);
- EXT4_INODE_SET_XTIME(i_mtime, inode, raw_inode);
- EXT4_INODE_SET_XTIME(i_atime, inode, raw_inode);
- EXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);
-
- raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
- raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
- if (likely(!test_opt2(inode->i_sb, HURD_COMPAT)))
- raw_inode->i_file_acl_high =
- cpu_to_le16(ei->i_file_acl >> 32);
- raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
- ext4_isize_set(raw_inode, ei->i_disksize);
-
- raw_inode->i_generation = cpu_to_le32(inode->i_generation);
- if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
- if (old_valid_dev(inode->i_rdev)) {
- raw_inode->i_block[0] =
- cpu_to_le32(old_encode_dev(inode->i_rdev));
- raw_inode->i_block[1] = 0;
- } else {
- raw_inode->i_block[0] = 0;
- raw_inode->i_block[1] =
- cpu_to_le32(new_encode_dev(inode->i_rdev));
- raw_inode->i_block[2] = 0;
- }
- } else if (!ext4_has_inline_data(inode)) {
- for (block = 0; block < EXT4_N_BLOCKS; block++)
- raw_inode->i_block[block] = ei->i_data[block];
- }
-
- if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
- u64 ivers = ext4_inode_peek_iversion(inode);
-
- raw_inode->i_disk_version = cpu_to_le32(ivers);
- if (ei->i_extra_isize) {
- if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
- raw_inode->i_version_hi =
- cpu_to_le32(ivers >> 32);
- raw_inode->i_extra_isize =
- cpu_to_le16(ei->i_extra_isize);
- }
- }
-
- if (i_projid != EXT4_DEF_PROJID &&
- !ext4_has_feature_project(inode->i_sb))
- err = err ?: -EFSCORRUPTED;
-
- if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE &&
- EXT4_FITS_IN_INODE(raw_inode, ei, i_projid))
- raw_inode->i_projid = cpu_to_le32(i_projid);
-
- ext4_inode_csum_set(inode, raw_inode, ei);
- return err;
-}
-
/*
* Post the struct inode info into an on-disk inode location in the
* buffer-cache. This gobbles the caller's reference to the
--
2.25.1
