From: David Sterba <dsterba@suse.com>
To: linux-btrfs@vger.kernel.org
Cc: David Sterba <dsterba@suse.com>
Subject: [PATCH] btrfs: open code timespec64 in struct btrfs_inode
Date: Tue, 10 Oct 2023 19:18:27 +0200 [thread overview]
Message-ID: <20231010171827.11968-1-dsterba@suse.com> (raw)
The type of timespec64::tv_nsec is 'unsigned long', while we have only
u32 for on-disk and in-memory. This wastes a few bytes in btrfs_inode.
Add separate members for sec and nsec with the corresponding type width.
This creates a 4 byte hole in btrfs_inode which can be utilized in the
future.
Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/btrfs_inode.h | 3 ++-
fs/btrfs/delayed-inode.c | 12 ++++--------
fs/btrfs/inode.c | 26 ++++++++++++--------------
3 files changed, 18 insertions(+), 23 deletions(-)
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index bebb5921b922..5572ae52444e 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -253,7 +253,8 @@ struct btrfs_inode {
struct btrfs_delayed_node *delayed_node;
/* File creation time. */
- struct timespec64 i_otime;
+ u64 i_otime_sec;
+ u32 i_otime_nsec;
/* Hook into fs_info->delayed_iputs */
struct list_head delayed_iput;
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index 4f364e242341..c640f87038a6 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -1847,10 +1847,8 @@ static void fill_stack_inode_item(struct btrfs_trans_handle *trans,
btrfs_set_stack_timespec_nsec(&inode_item->ctime,
inode_get_ctime(inode).tv_nsec);
- btrfs_set_stack_timespec_sec(&inode_item->otime,
- BTRFS_I(inode)->i_otime.tv_sec);
- btrfs_set_stack_timespec_nsec(&inode_item->otime,
- BTRFS_I(inode)->i_otime.tv_nsec);
+ btrfs_set_stack_timespec_sec(&inode_item->otime, BTRFS_I(inode)->i_otime_sec);
+ btrfs_set_stack_timespec_nsec(&inode_item->otime, BTRFS_I(inode)->i_otime_nsec);
}
int btrfs_fill_inode(struct inode *inode, u32 *rdev)
@@ -1899,10 +1897,8 @@ int btrfs_fill_inode(struct inode *inode, u32 *rdev)
inode_set_ctime(inode, btrfs_stack_timespec_sec(&inode_item->ctime),
btrfs_stack_timespec_nsec(&inode_item->ctime));
- BTRFS_I(inode)->i_otime.tv_sec =
- btrfs_stack_timespec_sec(&inode_item->otime);
- BTRFS_I(inode)->i_otime.tv_nsec =
- btrfs_stack_timespec_nsec(&inode_item->otime);
+ BTRFS_I(inode)->i_otime_sec = btrfs_stack_timespec_sec(&inode_item->otime);
+ BTRFS_I(inode)->i_otime_nsec = btrfs_stack_timespec_nsec(&inode_item->otime);
inode->i_generation = BTRFS_I(inode)->generation;
BTRFS_I(inode)->index_cnt = (u64)-1;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 6f67ac612c6e..b388505c91cc 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3771,10 +3771,8 @@ static int btrfs_read_locked_inode(struct inode *inode,
inode_set_ctime(inode, btrfs_timespec_sec(leaf, &inode_item->ctime),
btrfs_timespec_nsec(leaf, &inode_item->ctime));
- BTRFS_I(inode)->i_otime.tv_sec =
- btrfs_timespec_sec(leaf, &inode_item->otime);
- BTRFS_I(inode)->i_otime.tv_nsec =
- btrfs_timespec_nsec(leaf, &inode_item->otime);
+ BTRFS_I(inode)->i_otime_sec = btrfs_timespec_sec(leaf, &inode_item->otime);
+ BTRFS_I(inode)->i_otime_nsec = btrfs_timespec_nsec(leaf, &inode_item->otime);
inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item));
BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
@@ -3944,10 +3942,8 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
btrfs_set_token_timespec_nsec(&token, &item->ctime,
inode_get_ctime(inode).tv_nsec);
- btrfs_set_token_timespec_sec(&token, &item->otime,
- BTRFS_I(inode)->i_otime.tv_sec);
- btrfs_set_token_timespec_nsec(&token, &item->otime,
- BTRFS_I(inode)->i_otime.tv_nsec);
+ btrfs_set_token_timespec_sec(&token, &item->otime, BTRFS_I(inode)->i_otime_sec);
+ btrfs_set_token_timespec_nsec(&token, &item->otime, BTRFS_I(inode)->i_otime_nsec);
btrfs_set_token_inode_nbytes(&token, item, inode_get_bytes(inode));
btrfs_set_token_inode_generation(&token, item,
@@ -5609,7 +5605,8 @@ static struct inode *new_simple_dir(struct inode *dir,
inode->i_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
inode->i_mtime = inode_set_ctime_current(inode);
inode->i_atime = dir->i_atime;
- BTRFS_I(inode)->i_otime = inode->i_mtime;
+ BTRFS_I(inode)->i_otime_sec = inode->i_mtime.tv_sec;
+ BTRFS_I(inode)->i_otime_nsec = inode->i_mtime.tv_nsec;
inode->i_uid = dir->i_uid;
inode->i_gid = dir->i_gid;
@@ -6286,7 +6283,8 @@ int btrfs_create_new_inode(struct btrfs_trans_handle *trans,
inode->i_mtime = inode_set_ctime_current(inode);
inode->i_atime = inode->i_mtime;
- BTRFS_I(inode)->i_otime = inode->i_mtime;
+ BTRFS_I(inode)->i_otime_sec = inode->i_mtime.tv_sec;
+ BTRFS_I(inode)->i_otime_nsec = inode->i_mtime.tv_nsec;
/*
* We're going to fill the inode item now, so at this point the inode
@@ -8487,8 +8485,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
ei->delayed_node = NULL;
- ei->i_otime.tv_sec = 0;
- ei->i_otime.tv_nsec = 0;
+ ei->i_otime_sec = 0;
+ ei->i_otime_nsec = 0;
inode = &ei->vfs_inode;
extent_map_tree_init(&ei->extent_tree);
@@ -8642,8 +8640,8 @@ static int btrfs_getattr(struct mnt_idmap *idmap,
u32 bi_ro_flags = BTRFS_I(inode)->ro_flags;
stat->result_mask |= STATX_BTIME;
- stat->btime.tv_sec = BTRFS_I(inode)->i_otime.tv_sec;
- stat->btime.tv_nsec = BTRFS_I(inode)->i_otime.tv_nsec;
+ stat->btime.tv_sec = BTRFS_I(inode)->i_otime_sec;
+ stat->btime.tv_nsec = BTRFS_I(inode)->i_otime_nsec;
if (bi_flags & BTRFS_INODE_APPEND)
stat->attributes |= STATX_ATTR_APPEND;
if (bi_flags & BTRFS_INODE_COMPRESS)
--
2.41.0
reply other threads:[~2023-10-10 17:25 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231010171827.11968-1-dsterba@suse.com \
--to=dsterba@suse.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).