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Message-ID: <88df46f8-1330-5985-1781-a5635ad051f6@huawei.com>
Date: Sat, 29 Jul 2017 08:27:37 +0800
From: Chao Yu <yuchao0@...wei.com>
To: <jaegeuk@...nel.org>
CC: Chao Yu <chao@...nel.org>,
<linux-f2fs-devel@...ts.sourceforge.net>,
<linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] f2fs: obsolete FI_ACL_MODE
Hi Jaegeuk,
Could you take time to have a look at this? Is this change reasonable?
Thanks,
On 2017/7/26 22:33, Chao Yu wrote:
> From: Chao Yu <yuchao0@...wei.com>
>
> Previously, in order to avoid losing important inode metadata after
> checkpoint & sudden power-off, f2fs uses synchronous approach for
> updating inode metadata, so attribute in inode cache will be updated
> to node page cache, after flushing dirty node pages in checkpoint,
> these attribute in node page can be persisted.
>
> However, f2fs has changed to use asynchronous inode metadata update
> approach in commit 0f18b462b2e5 ("flush inode metadata when checkpoint
> is doing"), with this change, we can obsolete synchrounous metadata
> update approach including old acl updating method.>
> Signed-off-by: Chao Yu <yuchao0@...wei.com>
> ---
> fs/f2fs/acl.c | 8 +++-----
> fs/f2fs/f2fs.h | 13 -------------
> fs/f2fs/file.c | 43 ++++---------------------------------------
> fs/f2fs/xattr.c | 6 +-----
> 4 files changed, 8 insertions(+), 62 deletions(-)
>
> diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
> index b4b8438c42ef..25eaf243ee2e 100644
> --- a/fs/f2fs/acl.c
> +++ b/fs/f2fs/acl.c
> @@ -215,7 +215,8 @@ static int __f2fs_set_acl(struct inode *inode, int type,
> error = posix_acl_update_mode(inode, &inode->i_mode, &acl);
> if (error)
> return error;
> - set_acl_inode(inode, inode->i_mode);
> + inode->i_ctime = current_time(inode);
> + f2fs_mark_inode_dirty_sync(inode, true);
> }
> break;
>
> @@ -231,10 +232,8 @@ static int __f2fs_set_acl(struct inode *inode, int type,
>
> if (acl) {
> value = f2fs_acl_to_disk(F2FS_I_SB(inode), acl, &size);
> - if (IS_ERR(value)) {
> - clear_inode_flag(inode, FI_ACL_MODE);
> + if (IS_ERR(value))
> return PTR_ERR(value);
> - }
> }
>
> error = f2fs_setxattr(inode, name_index, "", value, size, ipage, 0);
> @@ -243,7 +242,6 @@ static int __f2fs_set_acl(struct inode *inode, int type,
> if (!error)
> set_cached_acl(inode, type, acl);
>
> - clear_inode_flag(inode, FI_ACL_MODE);
> return error;
> }
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 5cfffd6f0209..07a6697a0589 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -561,7 +561,6 @@ struct f2fs_inode_info {
> unsigned char i_dir_level; /* use for dentry level for large dir */
> unsigned int i_current_depth; /* use only in directory structure */
> unsigned int i_pino; /* parent inode number */
> - umode_t i_acl_mode; /* keep file acl mode temporarily */
>
> /* Use below internally in f2fs*/
> unsigned long flags; /* use to pass per-file flags */
> @@ -1957,7 +1956,6 @@ enum {
> FI_AUTO_RECOVER, /* indicate inode is recoverable */
> FI_DIRTY_DIR, /* indicate directory has dirty pages */
> FI_INC_LINK, /* need to increment i_nlink */
> - FI_ACL_MODE, /* indicate acl mode */
> FI_NO_ALLOC, /* should not allocate any blocks */
> FI_FREE_NID, /* free allocated nide */
> FI_NO_EXTENT, /* not to use the extent cache */
> @@ -2016,13 +2014,6 @@ static inline void clear_inode_flag(struct inode *inode, int flag)
> __mark_inode_dirty_flag(inode, flag, false);
> }
>
> -static inline void set_acl_inode(struct inode *inode, umode_t mode)
> -{
> - F2FS_I(inode)->i_acl_mode = mode;
> - set_inode_flag(inode, FI_ACL_MODE);
> - f2fs_mark_inode_dirty_sync(inode, false);
> -}
> -
> static inline void f2fs_i_links_write(struct inode *inode, bool inc)
> {
> if (inc)
> @@ -2295,10 +2286,6 @@ static inline int get_extra_isize(struct inode *inode)
> return F2FS_I(inode)->i_extra_isize / sizeof(__le32);
> }
>
> -#define get_inode_mode(i) \
> - ((is_inode_flag_set(i, FI_ACL_MODE)) ? \
> - (F2FS_I(i)->i_acl_mode) : ((i)->i_mode))
> -
> #define F2FS_TOTAL_EXTRA_ATTR_SIZE \
> (offsetof(struct f2fs_inode, i_extra_end) - \
> offsetof(struct f2fs_inode, i_extra_isize)) \
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index e13f0ada1110..f8d3f4f928e7 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -763,36 +763,6 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
> return 0;
> }
>
> -#ifdef CONFIG_F2FS_FS_POSIX_ACL
> -static void __setattr_copy(struct inode *inode, const struct iattr *attr)
> -{
> - unsigned int ia_valid = attr->ia_valid;
> -
> - if (ia_valid & ATTR_UID)
> - inode->i_uid = attr->ia_uid;
> - if (ia_valid & ATTR_GID)
> - inode->i_gid = attr->ia_gid;
> - if (ia_valid & ATTR_ATIME)
> - inode->i_atime = timespec_trunc(attr->ia_atime,
> - inode->i_sb->s_time_gran);
> - if (ia_valid & ATTR_MTIME)
> - inode->i_mtime = timespec_trunc(attr->ia_mtime,
> - inode->i_sb->s_time_gran);
> - if (ia_valid & ATTR_CTIME)
> - inode->i_ctime = timespec_trunc(attr->ia_ctime,
> - inode->i_sb->s_time_gran);
> - if (ia_valid & ATTR_MODE) {
> - umode_t mode = attr->ia_mode;
> -
> - if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
> - mode &= ~S_ISGID;
> - set_acl_inode(inode, mode);
> - }
> -}
> -#else
> -#define __setattr_copy setattr_copy
> -#endif
> -
> int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
> {
> struct inode *inode = d_inode(dentry);
> @@ -854,18 +824,13 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
> size_changed = true;
> }
>
> - __setattr_copy(inode, attr);
> + setattr_copy(inode, attr);
>
> - if (attr->ia_valid & ATTR_MODE) {
> - err = posix_acl_chmod(inode, get_inode_mode(inode));
> - if (err || is_inode_flag_set(inode, FI_ACL_MODE)) {
> - inode->i_mode = F2FS_I(inode)->i_acl_mode;
> - clear_inode_flag(inode, FI_ACL_MODE);
> - }
> - }
> + if (attr->ia_valid & ATTR_MODE)
> + err = posix_acl_chmod(inode, inode->i_mode);
>
> /* file size may changed here */
> - f2fs_mark_inode_dirty_sync(inode, size_changed);
> + f2fs_mark_inode_dirty_sync(inode, size_changed && !err);
>
> /* inode change will produce dirty node pages flushed by checkpoint */
> f2fs_balance_fs(F2FS_I_SB(inode), true);
> diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
> index ef3a3721ea6b..d0420870f79f 100644
> --- a/fs/f2fs/xattr.c
> +++ b/fs/f2fs/xattr.c
> @@ -654,14 +654,10 @@ static int __f2fs_setxattr(struct inode *inode, int index,
> if (error)
> goto exit;
>
> - if (is_inode_flag_set(inode, FI_ACL_MODE)) {
> - inode->i_mode = F2FS_I(inode)->i_acl_mode;
> - inode->i_ctime = current_time(inode);
> - clear_inode_flag(inode, FI_ACL_MODE);
> - }
> if (index == F2FS_XATTR_INDEX_ENCRYPTION &&
> !strcmp(name, F2FS_XATTR_NAME_ENCRYPTION_CONTEXT))
> f2fs_set_encrypted_inode(inode);
> + inode->i_ctime = current_time(inode);
> f2fs_mark_inode_dirty_sync(inode, true);
> if (!error && S_ISDIR(inode->i_mode))
> set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
>
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