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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c70
1 files changed, 68 insertions, 2 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 28555f191b62..85404f15e53a 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4174,6 +4174,65 @@ static int ext4_inode_blocks_set(handle_t *handle,
return 0;
}
+struct other_inode {
+ unsigned long orig_ino;
+ struct ext4_inode *raw_inode;
+};
+
+static int other_inode_match(struct inode * inode, unsigned long ino,
+ void *data)
+{
+ struct other_inode *oi = (struct other_inode *) data;
+
+ if ((inode->i_ino != ino) ||
+ (inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW |
+ I_DIRTY_SYNC | I_DIRTY_DATASYNC)) ||
+ ((inode->i_state & I_DIRTY_TIME) == 0))
+ return 0;
+ spin_lock(&inode->i_lock);
+ if (((inode->i_state & (I_FREEING | I_WILL_FREE | I_NEW |
+ I_DIRTY_SYNC | I_DIRTY_DATASYNC)) == 0) &&
+ (inode->i_state & I_DIRTY_TIME)) {
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
+ spin_unlock(&inode->i_lock);
+
+ spin_lock(&ei->i_raw_lock);
+ EXT4_INODE_SET_XTIME(i_ctime, inode, oi->raw_inode);
+ EXT4_INODE_SET_XTIME(i_mtime, inode, oi->raw_inode);
+ EXT4_INODE_SET_XTIME(i_atime, inode, oi->raw_inode);
+ ext4_inode_csum_set(inode, oi->raw_inode, ei);
+ spin_unlock(&ei->i_raw_lock);
+ trace_ext4_other_inode_update_time(inode, oi->orig_ino);
+ return -1;
+ }
+ spin_unlock(&inode->i_lock);
+ return -1;
+}
+
+/*
+ * Opportunistically update the other time fields for other inodes in
+ * the same inode table block.
+ */
+static void ext4_update_other_inodes_time(struct super_block *sb,
+ unsigned long orig_ino, char *buf)
+{
+ struct other_inode oi;
+ unsigned long ino;
+ int i, inodes_per_block = EXT4_SB(sb)->s_inodes_per_block;
+ int inode_size = EXT4_INODE_SIZE(sb);
+
+ oi.orig_ino = orig_ino;
+ ino = orig_ino & ~(inodes_per_block - 1);
+ for (i = 0; i < inodes_per_block; i++, ino++, buf += inode_size) {
+ if (ino == orig_ino)
+ continue;
+ oi.raw_inode = (struct ext4_inode *) buf;
+ (void) find_inode_nowait(sb, ino, other_inode_match, &oi);
+ }
+}
+
/*
* Post the struct inode info into an on-disk inode location in the
* buffer-cache. This gobbles the caller's reference to the
@@ -4283,10 +4342,11 @@ static int ext4_do_update_inode(handle_t *handle,
cpu_to_le16(ei->i_extra_isize);
}
}
-
ext4_inode_csum_set(inode, raw_inode, ei);
-
spin_unlock(&ei->i_raw_lock);
+ if (inode->i_sb->s_flags & MS_LAZYTIME)
+ ext4_update_other_inodes_time(inode->i_sb, inode->i_ino,
+ bh->b_data);
BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
rc = ext4_handle_dirty_metadata(handle, NULL, bh);
@@ -4875,11 +4935,17 @@ int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
* If the inode is marked synchronous, we don't honour that here - doing
* so would cause a commit on atime updates, which we don't bother doing.
* We handle synchronous inodes at the highest possible level.
+ *
+ * If only the I_DIRTY_TIME flag is set, we can skip everything. If
+ * I_DIRTY_TIME and I_DIRTY_SYNC is set, the only inode fields we need
+ * to copy into the on-disk inode structure are the timestamp files.
*/
void ext4_dirty_inode(struct inode *inode, int flags)
{
handle_t *handle;
+ if (flags == I_DIRTY_TIME)
+ return;
handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
if (IS_ERR(handle))
goto out;