The patch titled
Subject: tmpfs: support for file creation time
has been added to the -mm tree. Its filename is
tmpfs-support-for-file-creation-time.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/tmpfs-support-for-file-creation-time.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/tmpfs-support-for-file-creation-time.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Xavier Roche <xavier.roche@xxxxxxxxxxx>
Subject: tmpfs: support for file creation time
Various filesystems (including ext4) now support file creation time. This
patch adds such support for tmpfs-based filesystems.
Link: https://lkml.kernel.org/r/20220211213628.GA1919658@xavier-xps
Signed-off-by: Xavier Roche <xavier.roche@xxxxxxxxxxx>
Tested-by: Jean Delvare <jdelvare@xxxxxxx>
Reviewed-by: Jean Delvare <jdelvare@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/include/linux/shmem_fs.h~tmpfs-support-for-file-creation-time
+++ a/include/linux/shmem_fs.h
@@ -25,6 +25,7 @@ struct shmem_inode_info {
struct simple_xattrs xattrs; /* list of xattrs */
atomic_t stop_eviction; /* hold when working on inode */
struct inode vfs_inode;
+ struct timespec64 i_crtime; /* file creation time */
};
struct shmem_sb_info {
--- a/mm/shmem.c~tmpfs-support-for-file-creation-time
+++ a/mm/shmem.c
@@ -1061,6 +1061,12 @@ static int shmem_getattr(struct user_nam
if (shmem_is_huge(NULL, inode, 0))
stat->blksize = HPAGE_PMD_SIZE;
+ if ((request_mask & STATX_BTIME)) {
+ stat->result_mask |= STATX_BTIME;
+ stat->btime.tv_sec = info->i_crtime.tv_sec;
+ stat->btime.tv_nsec = info->i_crtime.tv_nsec;
+ }
+
return 0;
}
@@ -2265,6 +2271,7 @@ static struct inode *shmem_get_inode(str
atomic_set(&info->stop_eviction, 0);
info->seals = F_SEAL_SEAL;
info->flags = flags & VM_NORESERVE;
+ info->i_crtime = inode->i_mtime;
INIT_LIST_HEAD(&info->shrinklist);
INIT_LIST_HEAD(&info->swaplist);
simple_xattrs_init(&info->xattrs);
@@ -3196,6 +3203,7 @@ static ssize_t shmem_listxattr(struct de
#endif /* CONFIG_TMPFS_XATTR */
static const struct inode_operations shmem_short_symlink_operations = {
+ .getattr = shmem_getattr,
.get_link = simple_get_link,
#ifdef CONFIG_TMPFS_XATTR
.listxattr = shmem_listxattr,
@@ -3203,6 +3211,7 @@ static const struct inode_operations shm
};
static const struct inode_operations shmem_symlink_inode_operations = {
+ .getattr = shmem_getattr,
.get_link = shmem_get_link,
#ifdef CONFIG_TMPFS_XATTR
.listxattr = shmem_listxattr,
@@ -3790,6 +3799,7 @@ static const struct inode_operations shm
static const struct inode_operations shmem_dir_inode_operations = {
#ifdef CONFIG_TMPFS
+ .getattr = shmem_getattr,
.create = shmem_create,
.lookup = simple_lookup,
.link = shmem_link,
@@ -3811,6 +3821,7 @@ static const struct inode_operations shm
};
static const struct inode_operations shmem_special_inode_operations = {
+ .getattr = shmem_getattr,
#ifdef CONFIG_TMPFS_XATTR
.listxattr = shmem_listxattr,
#endif
_
Patches currently in -mm which might be from xavier.roche@xxxxxxxxxxx are
tmpfs-support-for-file-creation-time.patch
