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Subject[PATCH v2] f2fs: support inode creation time
Date
From: Chao Yu <yuchao0@huawei.com>

This patch adds creation time field in inode layout to support showing
kstat.btime in ->statx.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
v2:
- add missing sysfs entry.
fs/f2fs/f2fs.h | 7 +++++++
fs/f2fs/file.c | 9 +++++++++
fs/f2fs/inode.c | 16 ++++++++++++++++
fs/f2fs/namei.c | 3 ++-
fs/f2fs/sysfs.c | 7 +++++++
include/linux/f2fs_fs.h | 2 ++
6 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index b7ba496af28f..6300ac5bcbe4 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -124,6 +124,7 @@ struct f2fs_mount_info {
#define F2FS_FEATURE_INODE_CHKSUM 0x0020
#define F2FS_FEATURE_FLEXIBLE_INLINE_XATTR 0x0040
#define F2FS_FEATURE_QUOTA_INO 0x0080
+#define F2FS_FEATURE_INODE_CRTIME 0x0100

#define F2FS_HAS_FEATURE(sb, mask) \
((F2FS_SB(sb)->raw_super->feature & cpu_to_le32(mask)) != 0)
@@ -635,6 +636,7 @@ struct f2fs_inode_info {
int i_extra_isize; /* size of extra space located in i_addr */
kprojid_t i_projid; /* id for project quota */
int i_inline_xattr_size; /* inline xattr size */
+ struct timespec i_crtime; /* inode creation time */
};

static inline void get_extent_info(struct extent_info *ext,
@@ -3205,6 +3207,11 @@ static inline int f2fs_sb_has_quota_ino(struct super_block *sb)
return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_QUOTA_INO);
}

+static inline int f2fs_sb_has_inode_crtime(struct super_block *sb)
+{
+ return F2FS_HAS_FEATURE(sb, F2FS_FEATURE_INODE_CRTIME);
+}
+
#ifdef CONFIG_BLK_DEV_ZONED
static inline int get_blkz_type(struct f2fs_sb_info *sbi,
struct block_device *bdev, block_t blkaddr)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b9b1efe61d29..0873ba12ebc6 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -672,8 +672,17 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
{
struct inode *inode = d_inode(path->dentry);
struct f2fs_inode_info *fi = F2FS_I(inode);
+ struct f2fs_inode *ri;
unsigned int flags;

+ if (f2fs_has_extra_attr(inode) &&
+ f2fs_sb_has_inode_crtime(inode->i_sb) &&
+ F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
+ stat->result_mask |= STATX_BTIME;
+ stat->btime.tv_sec = fi->i_crtime.tv_sec;
+ stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
+ }
+
flags = fi->i_flags & (FS_FL_USER_VISIBLE | FS_PROJINHERIT_FL);
if (flags & FS_APPEND_FL)
stat->attributes |= STATX_ATTR_APPEND;
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index 1dc77a40d0ad..99ee72bff628 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -278,6 +278,13 @@ static int do_read_inode(struct inode *inode)
i_projid = F2FS_DEF_PROJID;
fi->i_projid = make_kprojid(&init_user_ns, i_projid);

+ if (f2fs_has_extra_attr(inode) && f2fs_sb_has_inode_crtime(sbi->sb) &&
+ F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_crtime)) {
+ fi->i_crtime.tv_sec = le64_to_cpu(ri->i_crtime);
+ fi->i_crtime.tv_nsec = le32_to_cpu(ri->i_crtime_nsec);
+ }
+
+
f2fs_put_page(node_page, 1);

stat_inc_inline_xattr(inode);
@@ -421,6 +428,15 @@ void update_inode(struct inode *inode, struct page *node_page)
F2FS_I(inode)->i_projid);
ri->i_projid = cpu_to_le32(i_projid);
}
+
+ if (f2fs_sb_has_inode_crtime(F2FS_I_SB(inode)->sb) &&
+ F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
+ i_crtime)) {
+ ri->i_crtime =
+ cpu_to_le64(F2FS_I(inode)->i_crtime.tv_sec);
+ ri->i_crtime_nsec =
+ cpu_to_le32(F2FS_I(inode)->i_crtime.tv_nsec);
+ }
}

__set_inode_rdev(inode, ri);
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 3ee97ba9d2d7..c4c94c7e9f4f 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -50,7 +50,8 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)

inode->i_ino = ino;
inode->i_blocks = 0;
- inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+ inode->i_mtime = inode->i_atime = inode->i_ctime =
+ F2FS_I(inode)->i_crtime = current_time(inode);
inode->i_generation = sbi->s_next_generation++;

err = insert_inode_locked(inode);
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 41887e6ec1b3..d978c7b6ea04 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -113,6 +113,9 @@ static ssize_t features_show(struct f2fs_attr *a,
if (f2fs_sb_has_quota_ino(sb))
len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
len ? ", " : "", "quota_ino");
+ if (f2fs_sb_has_inode_crtime(sb))
+ len += snprintf(buf + len, PAGE_SIZE - len, "%s%s",
+ len ? ", " : "", "inode_crtime");
len += snprintf(buf + len, PAGE_SIZE - len, "\n");
return len;
}
@@ -232,6 +235,7 @@ enum feat_id {
FEAT_INODE_CHECKSUM,
FEAT_FLEXIBLE_INLINE_XATTR,
FEAT_QUOTA_INO,
+ FEAT_INODE_CRTIME,
};

static ssize_t f2fs_feature_show(struct f2fs_attr *a,
@@ -246,6 +250,7 @@ static ssize_t f2fs_feature_show(struct f2fs_attr *a,
case FEAT_INODE_CHECKSUM:
case FEAT_FLEXIBLE_INLINE_XATTR:
case FEAT_QUOTA_INO:
+ case FEAT_INODE_CRTIME:
return snprintf(buf, PAGE_SIZE, "supported\n");
}
return 0;
@@ -323,6 +328,7 @@ F2FS_FEATURE_RO_ATTR(project_quota, FEAT_PROJECT_QUOTA);
F2FS_FEATURE_RO_ATTR(inode_checksum, FEAT_INODE_CHECKSUM);
F2FS_FEATURE_RO_ATTR(flexible_inline_xattr, FEAT_FLEXIBLE_INLINE_XATTR);
F2FS_FEATURE_RO_ATTR(quota_ino, FEAT_QUOTA_INO);
+F2FS_FEATURE_RO_ATTR(inode_crtime, FEAT_INODE_CRTIME);

#define ATTR_LIST(name) (&f2fs_attr_##name.attr)
static struct attribute *f2fs_attrs[] = {
@@ -376,6 +382,7 @@ static struct attribute *f2fs_feat_attrs[] = {
ATTR_LIST(inode_checksum),
ATTR_LIST(flexible_inline_xattr),
ATTR_LIST(quota_ino),
+ ATTR_LIST(inode_crtime),
NULL,
};

diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 6eed677b6d9a..73af22dc300a 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -253,6 +253,8 @@ struct f2fs_inode {
__le16 i_inline_xattr_size; /* inline xattr size, unit: 4 bytes */
__le32 i_projid; /* project id */
__le32 i_inode_checksum;/* inode meta checksum */
+ __le64 i_crtime; /* creation time */
+ __le32 i_crtime_nsec; /* creation time in nano scale */
__le32 i_extra_end[0]; /* for attribute size calculation */
};
__le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */
--
2.14.1.145.gb3622a4ee
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