The patch titled
Subject: tmpfs: support for file creation time
has been removed from the -mm tree. Its filename was
tmpfs-support-for-file-creation-time.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
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.
Note that using shmem_getattr() on other file types than regular requires
that shmem_is_huge() check type, to stop incorrect HPAGE_PMD_SIZE blksize.
[hughd@xxxxxxxxxx: three tweaks to creation time patch]
Link: https://lkml.kernel.org/r/b954973a-b8d1-cab8-63bd-6ea8063de3@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20220314211150.GA123458@xavier-xps
Link: https://lkml.kernel.org/r/b954973a-b8d1-cab8-63bd-6ea8063de3@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20220211213628.GA1919658@xavier-xps
Signed-off-by: Xavier Roche <xavier.roche@xxxxxxxxxxx>
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Tested-by: Jean Delvare <jdelvare@xxxxxxx>
Tested-by: Sylvain Bellone <sylvain.bellone@xxxxxxxxxxx>
Reported-by: Xavier Grand <xavier.grand@xxxxxxxxxxx>
Reviewed-by: Jean Delvare <jdelvare@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/shmem_fs.h | 1 +
mm/shmem.c | 16 +++++++++++++---
2 files changed, 14 insertions(+), 3 deletions(-)
--- a/include/linux/shmem_fs.h~tmpfs-support-for-file-creation-time
+++ a/include/linux/shmem_fs.h
@@ -24,6 +24,7 @@ struct shmem_inode_info {
struct shared_policy policy; /* NUMA memory alloc policy */
struct simple_xattrs xattrs; /* list of xattrs */
atomic_t stop_eviction; /* hold when working on inode */
+ struct timespec64 i_crtime; /* file creation time */
struct inode vfs_inode;
};
--- a/mm/shmem.c~tmpfs-support-for-file-creation-time
+++ a/mm/shmem.c
@@ -476,6 +476,8 @@ bool shmem_is_huge(struct vm_area_struct
{
loff_t i_size;
+ if (!S_ISREG(inode->i_mode))
+ return false;
if (shmem_huge == SHMEM_HUGE_DENY)
return false;
if (vma && ((vma->vm_flags & VM_NOHUGEPAGE) ||
@@ -1061,6 +1063,12 @@ 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;
}
@@ -1854,9 +1862,6 @@ repeat:
return 0;
}
- /* Never use a huge page for shmem_symlink() */
- if (S_ISLNK(inode->i_mode))
- goto alloc_nohuge;
if (!shmem_is_huge(vma, inode, index))
goto alloc_nohuge;
@@ -2265,6 +2270,7 @@ 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 +3202,7 @@ 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 +3210,7 @@ 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 +3798,7 @@ 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 +3820,7 @@ 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
