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btrfs: open code timespec64 in struct btrfs_inode

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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>
This commit is contained in:
David Sterba 2023-09-29 21:18:44 +02:00
parent cc687c2ef4
commit c6e8f898f5
3 changed files with 18 additions and 23 deletions
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3
fs/btrfs/btrfs_inode.h
View File

@ -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;

12
fs/btrfs/delayed-inode.c
View File

@ -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;

26
fs/btrfs/inode.c
View File

@ -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)