The patch titled
Subject: fat: report creation time in statx
has been added to the -mm mm-nonmm-unstable branch. Its filename is
fat-report-creation-time-in-statx.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/fat-report-creation-time-in-statx.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Chung-Chiang Cheng <cccheng@xxxxxxxxxxxx>
Subject: fat: report creation time in statx
Date: Tue, 3 May 2022 23:25:35 +0800
creation time is no longer mixed with change time. Add an in-memory field
for it, and report it in statx if supported.
Link: https://lkml.kernel.org/r/20220503152536.2503003-3-cccheng@xxxxxxxxxxxx
Signed-off-by: Chung-Chiang Cheng <cccheng@xxxxxxxxxxxx>
Acked-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fat/fat.h | 1 +
fs/fat/file.c | 14 +++++++++++---
fs/fat/inode.c | 10 ++++++++--
3 files changed, 20 insertions(+), 5 deletions(-)
--- a/fs/fat/fat.h~fat-report-creation-time-in-statx
+++ a/fs/fat/fat.h
@@ -126,6 +126,7 @@ struct msdos_inode_info {
struct hlist_node i_fat_hash; /* hash by i_location */
struct hlist_node i_dir_hash; /* hash by i_logstart */
struct rw_semaphore truncate_lock; /* protect bmap against truncate */
+ struct timespec64 i_crtime; /* File creation (birth) time */
struct inode vfs_inode;
};
--- a/fs/fat/file.c~fat-report-creation-time-in-statx
+++ a/fs/fat/file.c
@@ -399,13 +399,21 @@ int fat_getattr(struct user_namespace *m
struct kstat *stat, u32 request_mask, unsigned int flags)
{
struct inode *inode = d_inode(path->dentry);
+ struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
+
generic_fillattr(mnt_userns, inode, stat);
- stat->blksize = MSDOS_SB(inode->i_sb)->cluster_size;
+ stat->blksize = sbi->cluster_size;
- if (MSDOS_SB(inode->i_sb)->options.nfs == FAT_NFS_NOSTALE_RO) {
+ if (sbi->options.nfs == FAT_NFS_NOSTALE_RO) {
/* Use i_pos for ino. This is used as fileid of nfs. */
- stat->ino = fat_i_pos_read(MSDOS_SB(inode->i_sb), inode);
+ stat->ino = fat_i_pos_read(sbi, inode);
+ }
+
+ if (sbi->options.isvfat && request_mask & STATX_BTIME) {
+ stat->result_mask |= STATX_BTIME;
+ stat->btime = MSDOS_I(inode)->i_crtime;
}
+
return 0;
}
EXPORT_SYMBOL_GPL(fat_getattr);
--- a/fs/fat/inode.c~fat-report-creation-time-in-statx
+++ a/fs/fat/inode.c
@@ -568,9 +568,11 @@ int fat_fill_inode(struct inode *inode,
fat_time_fat2unix(sbi, &inode->i_mtime, de->time, de->date, 0);
inode->i_ctime = inode->i_mtime;
- if (sbi->options.isvfat)
+ if (sbi->options.isvfat) {
fat_time_fat2unix(sbi, &inode->i_atime, 0, de->adate, 0);
- else
+ fat_time_fat2unix(sbi, &MSDOS_I(inode)->i_crtime, de->ctime,
+ de->cdate, de->ctime_cs);
+ } else
inode->i_atime = fat_truncate_atime(sbi, &inode->i_mtime);
return 0;
@@ -756,6 +758,8 @@ static struct inode *fat_alloc_inode(str
ei->i_logstart = 0;
ei->i_attrs = 0;
ei->i_pos = 0;
+ ei->i_crtime.tv_sec = 0;
+ ei->i_crtime.tv_nsec = 0;
return &ei->vfs_inode;
}
@@ -889,6 +893,8 @@ retry:
__le16 atime;
fat_time_unix2fat(sbi, &inode->i_atime, &atime,
&raw_entry->adate, NULL);
+ fat_time_unix2fat(sbi, &MSDOS_I(inode)->i_crtime, &raw_entry->ctime,
+ &raw_entry->cdate, &raw_entry->ctime_cs);
}
spin_unlock(&sbi->inode_hash_lock);
mark_buffer_dirty(bh);
_
Patches currently in -mm which might be from cccheng@xxxxxxxxxxxx are
fat-split-fat_truncate_time-into-separate-functions.patch
fat-ignore-ctime-updates-and-keep-ctime-identical-to-mtime-in-memory.patch
fat-report-creation-time-in-statx.patch
fat-remove-time-truncations-in-vfat_create-vfat_mkdir.patch
