On 06/27, Chao Yu wrote:
On 2023/6/26 21:11, Jaegeuk Kim wrote:
On 06/25, Chao Yu wrote:
On 2023/6/25 15:26, Chao Yu wrote:
One concern below:
Thread A: Thread B:
- f2fs_getxattr - lookup_all_xattrs - read_inline_xattr - f2fs_get_node_page(ino) - memcpy inline xattr - f2fs_put_page - f2fs_setxattr - __f2fs_setxattr - __f2fs_setxattr - write_all_xattrs - write xnode and inode ---> inline xattr may out of update here. - read_xattr_block - f2fs_get_node_page(xnid) - memcpy xnode xattr - f2fs_put_page
Do we need to keep xattr_{get,set} being atomical operation?
It seems xfstest starts to complain w/ below message...
I don't see any failure. Which test do you see?
051, 083, ... 467, 642
Testcase doesn't fail, but kernel log shows inode has corrupted xattr.
I got it. It seems I had to fix the above issue only while keeping the sem. :(
[ 3400.856443] F2FS-fs (vdc): inode (2187) has invalid last xattr entry, entry_size: 21468 [ 3400.864042] F2FS-fs (vdc): inode (1595) has invalid last xattr entry, entry_size: 26580 [ 3400.865764] F2FS-fs (vdc): inode (2187) has invalid last xattr entry, entry_size: 21468 [ 3400.880067] F2FS-fs (vdc): inode (9839) has corrupted xattr [ 3400.880714] F2FS-fs (vdc): inode (10855) has corrupted xattr
Thanks,
Thanks,
I think we don't need to truncate xattr pages eagerly which introduces lots of data races without big benefits.
Cc: stable@vger.kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org
fs/f2fs/f2fs.h | 1 - fs/f2fs/super.c | 1 - fs/f2fs/xattr.c | 31 ++++++++----------------------- 3 files changed, 8 insertions(+), 25 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 3f5b161dd743..7b9af2d51656 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -838,7 +838,6 @@ struct f2fs_inode_info { /* avoid racing between foreground op and gc */ struct f2fs_rwsem i_gc_rwsem[2]; - struct f2fs_rwsem i_xattr_sem; /* avoid racing between reading and changing EAs */ int i_extra_isize; /* size of extra space located in i_addr */ kprojid_t i_projid; /* id for project quota */ diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 1b2c788ed80d..c917fa771f0e 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1418,7 +1418,6 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb) INIT_LIST_HEAD(&fi->gdirty_list); init_f2fs_rwsem(&fi->i_gc_rwsem[READ]); init_f2fs_rwsem(&fi->i_gc_rwsem[WRITE]); - init_f2fs_rwsem(&fi->i_xattr_sem); /* Will be used by directory only */ fi->i_dir_level = F2FS_SB(sb)->dir_level; diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c index 213805d3592c..bdc8a55085a2 100644 --- a/fs/f2fs/xattr.c +++ b/fs/f2fs/xattr.c @@ -433,7 +433,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize, { struct f2fs_sb_info *sbi = F2FS_I_SB(inode); size_t inline_size = inline_xattr_size(inode); - struct page *in_page = NULL; + struct page *in_page = ipage; void *xattr_addr; void *inline_addr = NULL; struct page *xpage; @@ -446,29 +446,19 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize, /* write to inline xattr */ if (inline_size) { - if (ipage) { - inline_addr = inline_xattr_addr(inode, ipage); - } else { + if (!in_page) { in_page = f2fs_get_node_page(sbi, inode->i_ino); if (IS_ERR(in_page)) { f2fs_alloc_nid_failed(sbi, new_nid); return PTR_ERR(in_page); } - inline_addr = inline_xattr_addr(inode, in_page); } + inline_addr = inline_xattr_addr(inode, in_page); - f2fs_wait_on_page_writeback(ipage ? ipage : in_page, - NODE, true, true); - /* no need to use xattr node block */ + f2fs_wait_on_page_writeback(in_page, NODE, true, true); if (hsize <= inline_size) { - err = f2fs_truncate_xattr_node(inode); - f2fs_alloc_nid_failed(sbi, new_nid); - if (err) { - f2fs_put_page(in_page, 1); - return err; - } memcpy(inline_addr, txattr_addr, inline_size); - set_page_dirty(ipage ? ipage : in_page); + set_page_dirty(in_page); goto in_page_out; } } @@ -502,12 +492,13 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize, memcpy(xattr_addr, txattr_addr + inline_size, VALID_XATTR_BLOCK_SIZE); if (inline_size) - set_page_dirty(ipage ? ipage : in_page); + set_page_dirty(in_page); set_page_dirty(xpage); f2fs_put_page(xpage, 1); in_page_out: - f2fs_put_page(in_page, 1); + if (in_page != ipage) + f2fs_put_page(in_page, 1); return err; } @@ -528,10 +519,8 @@ int f2fs_getxattr(struct inode *inode, int index, const char *name, if (len > F2FS_NAME_LEN) return -ERANGE; - f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); error = lookup_all_xattrs(inode, ipage, index, len, name, &entry, &base_addr, &base_size, &is_inline); - f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); if (error) return error; @@ -565,9 +554,7 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) int error; size_t rest = buffer_size; - f2fs_down_read(&F2FS_I(inode)->i_xattr_sem); error = read_all_xattrs(inode, NULL, &base_addr); - f2fs_up_read(&F2FS_I(inode)->i_xattr_sem); if (error) return error; @@ -794,9 +781,7 @@ int f2fs_setxattr(struct inode *inode, int index, const char *name, f2fs_balance_fs(sbi, true); f2fs_lock_op(sbi); - f2fs_down_write(&F2FS_I(inode)->i_xattr_sem); err = __f2fs_setxattr(inode, index, name, value, size, ipage, flags); - f2fs_up_write(&F2FS_I(inode)->i_xattr_sem); f2fs_unlock_op(sbi); f2fs_update_time(sbi, REQ_TIME);
Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel