Kernel July 2022

kernel@openeuler.org

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66 discussions

[PATCH OLK-5.10 0/7] eulerfs: Add extended attributes support
by gouhao＠uniontech.com 05 Jul '22

05 Jul '22

From: Gou Hao <gouhao(a)uniontech.com> Patch series "Add extended attributes support for EulerFS". I refer to the extended attribute implementation code of ext2 file system. At first, I implemented it completely according to the extended attribute of ext file system. But later, I changed the disk layout of entries. About layout of entry: The layout of ext2's extended attribute is that name and value are stored separately,with name growing from top to bottom and value growing from bottom to top. I think the layout of ext2 wastes space, because, Name and value are aligned with 4 bytes, In the worst case, the name and value of entry need 3 bytes of padding respectively, and a total of 6 bytes are wasted. I store the name and value together. In the worst case, only need 3 bytes of padding.Use xattr-test.c selftests, with the same block size, my method can store 112 entries, while using ext2 layout can only store 102 entries. In ext4 file system, value can be stored in different blocks, which increases the scalability. In my method, it can add a pointer to the next block in the header to achieve the same function, and it is simpler. The performance of my method is the same as that of ext2, or even better. About block share: In ext2, if the extended attributes of two files are exactly the same, they can share the same disk block. Its implementation process is: 1. When accessing the extended attribute of a file, add this extended attribute block to a specific cache. 2. When setting the extended attribute of a file, if there is a block with exactly the same content as this extended attribute in the cache, share that block directly. There is a problem here. If the block of a file is not added to the cache, the extended attribute block will not be shared.So in this patch set, I didn't realize the shared disk block. I'll implement it later when there is a good method or when there is a need. At present, only user. prefix xattr is implemented. Trusted, ACL and security will be implemented later. Gou Hao (7): eulerfs: add EULER_FS_XATTR config eulerfs: add related fields of extended attributes eulerfs: add alloc xattr block interface eulerfs: implement extended attribute core functions eulerfs: add callback interface of extended attribute eulerfs: add implementation of user. prefix extended attribute eulerfs: add selftests for eulerfs extended attribute fs/eulerfs/Kconfig | 9 + fs/eulerfs/Makefile | 1 + fs/eulerfs/alloc_interface.h | 4 + fs/eulerfs/const.h | 1 + fs/eulerfs/euler.h | 1 + fs/eulerfs/euler_def.h | 3 + fs/eulerfs/file.c | 1 + fs/eulerfs/inode.c | 3 + fs/eulerfs/namei.c | 2 + fs/eulerfs/nvalloc.c | 1 + fs/eulerfs/nvalloc.h | 1 + fs/eulerfs/nvm_struct.h | 12 + fs/eulerfs/super.c | 36 +- fs/eulerfs/symlink.c | 1 + fs/eulerfs/xattr.c | 422 ++++++++++++++ fs/eulerfs/xattr.h | 99 ++++ fs/eulerfs/xattr_user.c | 43 ++ tools/testing/selftests/eulerfs/Makefile | 6 + tools/testing/selftests/eulerfs/xattr-test.c | 565 +++++++++++++++++++ 19 files changed, 1209 insertions(+), 2 deletions(-) create mode 100644 fs/eulerfs/xattr.c create mode 100644 fs/eulerfs/xattr.h create mode 100644 fs/eulerfs/xattr_user.c create mode 100644 tools/testing/selftests/eulerfs/Makefile create mode 100644 tools/testing/selftests/eulerfs/xattr-test.c -- 2.20.1

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openEuler kernel SIG例会
by openEuler conference 05 Jul '22

05 Jul '22

您好！ Kernel SIG 邀请您参加 2022-07-08 14:00 召开的Zoom会议(自动录制) 会议主题：openEuler kernel SIG例会会议内容：美团贡献富容器隔离及内部自研混部特性到openEuler kernel的讨论会议链接：https://us06web.zoom.us/j/89123664797?pwd=S1BKR3BHTTBOZUd0TTg2VE9FRUVMQT09 会议纪要：https://etherpad.openeuler.org/p/Kernel-meetings 温馨提醒：建议接入会议后修改参会人的姓名，也可以使用您在gitee.com的ID 更多资讯尽在：https://openeuler.org/zh/ Hello! openEuler Kernel SIG invites you to attend the Zoom conference(auto recording) will be held at 2022-07-08 14:00, The subject of the conference is openEuler kernel SIG例会, Summary: 美团贡献富容器隔离及内部自研混部特性到openEuler kernel的讨论 You can join the meeting at https://us06web.zoom.us/j/89123664797?pwd=S1BKR3BHTTBOZUd0TTg2VE9FRUVMQT09. Add topics at https://etherpad.openeuler.org/p/Kernel-meetings. Note: You are advised to change the participant name after joining the conference or use your ID at gitee.com. More information: https://openeuler.org/en/

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请问咱们的内核有对飞腾的的设备的支持吗？
by sireg 04 Jul '22

04 Jul '22

我运行咱们的系统在一台分腾d2000的机器上，发现网卡是驱动不起来的。网卡型号是PHYT0004，走的MDIO的总线，使用stmmac的驱动。以上是我了解的相关技术，目前网卡驱动不起来，所以没有相关dmesg日志。正在着手解决该问题，所以提请咨询。                                                                    王铭 sireg firerun(a)qq.com  

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请问咱们的内核有对飞腾的的设备的支持吗？
by sireg 04 Jul '22

04 Jul '22

我运行咱们的系统在一台飞腾d2000的机器上，发现网卡驱动不起来。以上是我了解的相关技术，目前网卡驱动不起来，所以没有相关dmesg日志。网卡型号是PHYT0004，如果驱动起来，应该是走的MDIO的总线，使用stmmac的驱动。正在着手解决该问题，所以提请咨询。                                                                    王铭 sireg firerun(a)qq.com  

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[PATCH openEuler-1.0-LTS 1/4] ext4: add EXT4_INODE_HAS_XATTR_SPACE macro in xattr.h
by Yongqiang Liu 02 Jul '22

02 Jul '22

From: Baokun Li <libaokun1(a)huawei.com> hulk inclusion category: bugfix bugzilla: 186866, https://gitee.com/openeuler/kernel/issues/I5DTBL CVE: NA -------------------------------- When adding an xattr to an inode, we must ensure that the inode_size is not less than EXT4_GOOD_OLD_INODE_SIZE + extra_isize + pad. Otherwise, the end position may be greater than the start position, resulting in UAF. Signed-off-by: Baokun Li <libaokun1(a)huawei.com> Reviewed-by: Zhang Yi <yi.zhang(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- fs/ext4/xattr.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index f39cad2abe2a..990084e00374 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -95,6 +95,19 @@ struct ext4_xattr_entry { #define EXT4_ZERO_XATTR_VALUE ((void *)-1) +/* + * If we want to add an xattr to the inode, we should make sure that + * i_extra_isize is not 0 and that the inode size is not less than + * EXT4_GOOD_OLD_INODE_SIZE + extra_isize + pad. + * EXT4_GOOD_OLD_INODE_SIZE extra_isize header entry pad data + * |--------------------------|------------|------|---------|---|-------| + */ +#define EXT4_INODE_HAS_XATTR_SPACE(inode) \ + ((EXT4_I(inode)->i_extra_isize != 0) && \ + (EXT4_GOOD_OLD_INODE_SIZE + EXT4_I(inode)->i_extra_isize + \ + sizeof(struct ext4_xattr_ibody_header) + EXT4_XATTR_PAD <= \ + EXT4_INODE_SIZE((inode)->i_sb))) + struct ext4_xattr_info { const char *name; const void *value; -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/4] mm/sharepool: Fix using uninitialized sp_flag
by Yongqiang Liu 01 Jul '22

01 Jul '22

From: Wang Wensheng <wangwensheng4(a)huawei.com> hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I578LV CVE: NA ------------------------------------------------- Add the missing initialization for kc.sp_flag in sp_make_share_kva_to_spg(). Or a random value would be used in sp_remap_kva_to_vma(). Fixes: da51b55eeff9 ("mm/share_pool: Support read-only memory allocation") Signed-off-by: Wang Wensheng <wangwensheng4(a)huawei.com> Reviewed-by: Weilong Chen <chenweilong(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- mm/share_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/share_pool.c b/mm/share_pool.c index ec889155b0ff..893e5352bf01 100644 --- a/mm/share_pool.c +++ b/mm/share_pool.c @@ -3023,7 +3023,7 @@ static void *sp_make_share_kva_to_spg(unsigned long kva, unsigned long size, } spa->kva = kva; - + kc.sp_flags = sp_flags; list_for_each_entry(spg_node, &spg->procs, proc_node) { mm = spg_node->master->mm; kc.state = K2U_NORMAL; -- 2.25.1

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