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authorChris Mason <chris.mason@oracle.com>2008-12-09 00:40:21 +0300
committerChris Mason <chris.mason@oracle.com>2008-12-09 00:40:21 +0300
commitc3027eb5523d6983f12628f3fe13d8a7576db701 (patch)
tree6a912094818ff261667228a4f6d83ecc4513ac43 /fs/btrfs/inode.c
parent934d375bacf9ea8a37fbfff5f3cf1c093f324095 (diff)
downloadlinux-c3027eb5523d6983f12628f3fe13d8a7576db701.tar.xz
Btrfs: Add inode sequence number for NFS and reserved space in a few structs
This adds a sequence number to the btrfs inode that is increased on every update. NFS will be able to use that to detect when an inode has changed, without relying on inaccurate time fields. While we're here, this also: Puts reserved space into the super block and inode Adds a log root transid to the super so we can pick the newest super based on the fsync log as well as the main transaction ID. For now the log root transid is always zero, but that'll get fixed. Adds a starting offset to the dev_item. This will let us do better alignment calculations if we know the start of a partition on the disk. Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index c03d847b8c4e..932d8c0b2c05 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1963,6 +1963,7 @@ void btrfs_read_locked_inode(struct inode *inode)
inode_set_bytes(inode, btrfs_inode_nbytes(leaf, inode_item));
BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
+ BTRFS_I(inode)->sequence = btrfs_inode_sequence(leaf, inode_item);
inode->i_generation = BTRFS_I(inode)->generation;
inode->i_rdev = 0;
rdev = btrfs_inode_rdev(leaf, inode_item);
@@ -2043,6 +2044,7 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
btrfs_set_inode_nbytes(leaf, item, inode_get_bytes(inode));
btrfs_set_inode_generation(leaf, item, BTRFS_I(inode)->generation);
+ btrfs_set_inode_sequence(leaf, item, BTRFS_I(inode)->sequence);
btrfs_set_inode_transid(leaf, item, trans->transid);
btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags);
@@ -2945,6 +2947,7 @@ static noinline void init_btrfs_i(struct inode *inode)
bi->i_default_acl = NULL;
bi->generation = 0;
+ bi->sequence = 0;
bi->last_trans = 0;
bi->logged_trans = 0;
bi->delalloc_bytes = 0;
@@ -2959,7 +2962,6 @@ static noinline void init_btrfs_i(struct inode *inode)
inode->i_mapping, GFP_NOFS);
INIT_LIST_HEAD(&BTRFS_I(inode)->delalloc_inodes);
btrfs_ordered_inode_tree_init(&BTRFS_I(inode)->ordered_tree);
- mutex_init(&BTRFS_I(inode)->csum_mutex);
mutex_init(&BTRFS_I(inode)->extent_mutex);
mutex_init(&BTRFS_I(inode)->log_mutex);
}