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chandanrmasoncl
chandanr
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masoncl
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Btrfs: Add code to support file creation time
This patch adds a new member to the 'struct btrfs_inode' structure to hold the file creation time. Signed-off-by: chandan <chandanrmail@gmail.com> [refreshed, removed btrfs_inode_otime] Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
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‎fs/btrfs/btrfs_inode.h

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -185,6 +185,9 @@ struct btrfs_inode {
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186186
struct btrfs_delayed_node *delayed_node;
187187

188+
/* File creation time. */
189+
struct timespec i_otime;
190+
188191
struct inode vfs_inode;
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};
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‎fs/btrfs/delayed-inode.c

Lines changed: 10 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1769,6 +1769,11 @@ static void fill_stack_inode_item(struct btrfs_trans_handle *trans,
17691769
inode->i_ctime.tv_sec);
17701770
btrfs_set_stack_timespec_nsec(&inode_item->ctime,
17711771
inode->i_ctime.tv_nsec);
1772+
1773+
btrfs_set_stack_timespec_sec(&inode_item->otime,
1774+
BTRFS_I(inode)->i_otime.tv_sec);
1775+
btrfs_set_stack_timespec_nsec(&inode_item->otime,
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BTRFS_I(inode)->i_otime.tv_nsec);
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}
17731778

17741779
int btrfs_fill_inode(struct inode *inode, u32 *rdev)
@@ -1810,6 +1815,11 @@ int btrfs_fill_inode(struct inode *inode, u32 *rdev)
18101815
inode->i_ctime.tv_sec = btrfs_stack_timespec_sec(&inode_item->ctime);
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inode->i_ctime.tv_nsec = btrfs_stack_timespec_nsec(&inode_item->ctime);
18121817

1818+
BTRFS_I(inode)->i_otime.tv_sec =
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btrfs_stack_timespec_sec(&inode_item->otime);
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BTRFS_I(inode)->i_otime.tv_nsec =
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btrfs_stack_timespec_nsec(&inode_item->otime);
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18131823
inode->i_generation = BTRFS_I(inode)->generation;
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BTRFS_I(inode)->index_cnt = (u64)-1;
18151825

‎fs/btrfs/inode.c

Lines changed: 23 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3535,6 +3535,11 @@ static void btrfs_read_locked_inode(struct inode *inode)
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inode->i_ctime.tv_sec = btrfs_timespec_sec(leaf, &inode_item->ctime);
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inode->i_ctime.tv_nsec = btrfs_timespec_nsec(leaf, &inode_item->ctime);
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3538+
BTRFS_I(inode)->i_otime.tv_sec =
3539+
btrfs_timespec_sec(leaf, &inode_item->otime);
3540+
BTRFS_I(inode)->i_otime.tv_nsec =
3541+
btrfs_timespec_nsec(leaf, &inode_item->otime);
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35383543
inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item));
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BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
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BTRFS_I(inode)->last_trans = btrfs_inode_transid(leaf, inode_item);
@@ -3669,6 +3674,11 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
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btrfs_set_token_timespec_nsec(leaf, &item->ctime,
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inode->i_ctime.tv_nsec, &token);
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3677+
btrfs_set_token_timespec_sec(leaf, &item->otime,
3678+
BTRFS_I(inode)->i_otime.tv_sec, &token);
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btrfs_set_token_timespec_nsec(leaf, &item->otime,
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BTRFS_I(inode)->i_otime.tv_nsec, &token);
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36723682
btrfs_set_token_inode_nbytes(leaf, item, inode_get_bytes(inode),
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&token);
36743684
btrfs_set_token_inode_generation(leaf, item, BTRFS_I(inode)->generation,
@@ -5260,7 +5270,10 @@ static struct inode *new_simple_dir(struct super_block *s,
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inode->i_op = &btrfs_dir_ro_inode_operations;
52615271
inode->i_fop = &simple_dir_operations;
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inode->i_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
5263-
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
5273+
inode->i_mtime = CURRENT_TIME;
5274+
inode->i_atime = inode->i_mtime;
5275+
inode->i_ctime = inode->i_mtime;
5276+
BTRFS_I(inode)->i_otime = inode->i_mtime;
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52655278
return inode;
52665279
}
@@ -5828,7 +5841,12 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
58285841

58295842
inode_init_owner(inode, dir, mode);
58305843
inode_set_bytes(inode, 0);
5831-
inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
5844+
5845+
inode->i_mtime = CURRENT_TIME;
5846+
inode->i_atime = inode->i_mtime;
5847+
inode->i_ctime = inode->i_mtime;
5848+
BTRFS_I(inode)->i_otime = inode->i_mtime;
5849+
58325850
inode_item = btrfs_item_ptr(path->nodes[0], path->slots[0],
58335851
struct btrfs_inode_item);
58345852
memset_extent_buffer(path->nodes[0], 0, (unsigned long)inode_item,
@@ -8577,6 +8595,9 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
85778595

85788596
ei->delayed_node = NULL;
85798597

8598+
ei->i_otime.tv_sec = 0;
8599+
ei->i_otime.tv_nsec = 0;
8600+
85808601
inode = &ei->vfs_inode;
85818602
extent_map_tree_init(&ei->extent_tree);
85828603
extent_io_tree_init(&ei->io_tree, &inode->i_data);

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