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-rw-r--r--fs/btrfs/ctree.h7
-rw-r--r--fs/btrfs/disk-io.c3
-rw-r--r--fs/btrfs/extent-tree.c39
-rw-r--r--fs/btrfs/ioctl.c21
-rw-r--r--fs/btrfs/ordered-data.c56
-rw-r--r--fs/btrfs/ordered-data.h7
6 files changed, 113 insertions, 20 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 8ecac2e..6675e91 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -539,6 +539,13 @@ struct btrfs_fs_info {
atomic_t nr_async_submits;
/*
+ * this is used by the balancing code to wait for all the pending
+ * ordered extents
+ */
+ spinlock_t ordered_extent_lock;
+ struct list_head ordered_extents;
+
+ /*
* there is a pool of worker threads for checksumming during writes
* and a pool for checksumming after reads. This is because readers
* can run with FS locks held, and the writers may be waiting for
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 7ce3f83..ec01062 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1252,6 +1252,9 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fs_info->btree_inode->i_nlink = 1;
fs_info->thread_pool_size = min(num_online_cpus() + 2, 8);
+ INIT_LIST_HEAD(&fs_info->ordered_extents);
+ spin_lock_init(&fs_info->ordered_extent_lock);
+
sb->s_blocksize = 4096;
sb->s_blocksize_bits = blksize_bits(4096);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index febc629..f92b297 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2640,6 +2640,7 @@ static int noinline relocate_inode_pages(struct inode *inode, u64 start,
struct file_ra_state *ra;
unsigned long total_read = 0;
unsigned long ra_pages;
+ struct btrfs_ordered_extent *ordered;
struct btrfs_trans_handle *trans;
ra = kzalloc(sizeof(*ra), GFP_NOFS);
@@ -2658,9 +2659,9 @@ static int noinline relocate_inode_pages(struct inode *inode, u64 start,
calc_ra(i, last_index, ra_pages));
}
total_read++;
- if (((u64)i << PAGE_CACHE_SHIFT) > inode->i_size)
+again:
+ if (((u64)i << PAGE_CACHE_SHIFT) > i_size_read(inode))
goto truncate_racing;
-
page = grab_cache_page(inode->i_mapping, i);
if (!page) {
goto out_unlock;
@@ -2674,18 +2675,24 @@ static int noinline relocate_inode_pages(struct inode *inode, u64 start,
goto out_unlock;
}
}
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
- ClearPageDirty(page);
-#else
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
-#endif
wait_on_page_writeback(page);
- set_page_extent_mapped(page);
+
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
-
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ ordered = btrfs_lookup_ordered_extent(inode, page_start);
+ if (ordered) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ unlock_page(page);
+ page_cache_release(page);
+ btrfs_start_ordered_extent(inode, ordered, 1);
+ btrfs_put_ordered_extent(ordered);
+ goto again;
+ }
+ set_page_extent_mapped(page);
+
+
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);
set_page_dirty(page);
@@ -2694,10 +2701,18 @@ static int noinline relocate_inode_pages(struct inode *inode, u64 start,
unlock_page(page);
page_cache_release(page);
}
- balance_dirty_pages_ratelimited_nr(inode->i_mapping,
- total_read);
out_unlock:
+ /* we have to start the IO in order to get the ordered extents
+ * instantiated. This allows the relocation to code to wait
+ * for all the ordered extents to hit the disk.
+ *
+ * Otherwise, it would constantly loop over the same extents
+ * because the old ones don't get deleted until the IO is
+ * started
+ */
+ btrfs_fdatawrite_range(inode->i_mapping, start, start + len - 1,
+ WB_SYNC_NONE);
kfree(ra);
trans = btrfs_start_transaction(BTRFS_I(inode)->root, 1);
if (trans) {
@@ -3238,6 +3253,8 @@ next:
btrfs_clean_old_snapshots(tree_root);
+ btrfs_wait_ordered_extents(tree_root);
+
trans = btrfs_start_transaction(tree_root, 1);
btrfs_commit_transaction(trans, tree_root);
mutex_lock(&root->fs_info->alloc_mutex);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 83f17a5..a61f2e7 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -213,6 +213,7 @@ int btrfs_defrag_file(struct file *file)
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
+ struct btrfs_ordered_extent *ordered;
struct page *page;
unsigned long last_index;
unsigned long ra_pages = root->fs_info->bdi.ra_pages;
@@ -234,6 +235,7 @@ int btrfs_defrag_file(struct file *file)
min(last_index, i + ra_pages - 1));
}
total_read++;
+again:
page = grab_cache_page(inode->i_mapping, i);
if (!page)
goto out_unlock;
@@ -247,18 +249,23 @@ int btrfs_defrag_file(struct file *file)
}
}
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
- ClearPageDirty(page);
-#else
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
-#endif
wait_on_page_writeback(page);
- set_page_extent_mapped(page);
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
-
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
+
+ ordered = btrfs_lookup_ordered_extent(inode, page_start);
+ if (ordered) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ unlock_page(page);
+ page_cache_release(page);
+ btrfs_start_ordered_extent(inode, ordered, 1);
+ btrfs_put_ordered_extent(ordered);
+ goto again;
+ }
+ set_page_extent_mapped(page);
+
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index e42fd23..676e4bd 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -167,20 +167,28 @@ int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
entry->file_offset = file_offset;
entry->start = start;
entry->len = len;
+ entry->inode = inode;
+
/* one ref for the tree */
atomic_set(&entry->refs, 1);
init_waitqueue_head(&entry->wait);
INIT_LIST_HEAD(&entry->list);
+ INIT_LIST_HEAD(&entry->root_extent_list);
node = tree_insert(&tree->tree, file_offset,
&entry->rb_node);
if (node) {
- entry = rb_entry(node, struct btrfs_ordered_extent, rb_node);
- atomic_inc(&entry->refs);
+ printk("warning dup entry from add_ordered_extent\n");
+ BUG();
}
set_extent_ordered(&BTRFS_I(inode)->io_tree, file_offset,
entry_end(entry) - 1, GFP_NOFS);
+ spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
+ list_add_tail(&entry->root_extent_list,
+ &BTRFS_I(inode)->root->fs_info->ordered_extents);
+ spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
+
mutex_unlock(&tree->mutex);
BUG_ON(node);
return 0;
@@ -285,11 +293,55 @@ int btrfs_remove_ordered_extent(struct inode *inode,
rb_erase(node, &tree->tree);
tree->last = NULL;
set_bit(BTRFS_ORDERED_COMPLETE, &entry->flags);
+
+ spin_lock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
+ list_del_init(&entry->root_extent_list);
+ spin_unlock(&BTRFS_I(inode)->root->fs_info->ordered_extent_lock);
+
mutex_unlock(&tree->mutex);
wake_up(&entry->wait);
return 0;
}
+int btrfs_wait_ordered_extents(struct btrfs_root *root)
+{
+ struct list_head splice;
+ struct list_head *cur;
+ struct btrfs_ordered_extent *ordered;
+ struct inode *inode;
+
+ INIT_LIST_HEAD(&splice);
+
+ spin_lock(&root->fs_info->ordered_extent_lock);
+ list_splice_init(&root->fs_info->ordered_extents, &splice);
+ while(!list_empty(&splice)) {
+ cur = splice.next;
+ ordered = list_entry(cur, struct btrfs_ordered_extent,
+ root_extent_list);
+ list_del_init(&ordered->root_extent_list);
+ atomic_inc(&ordered->refs);
+ inode = ordered->inode;
+
+ /*
+ * the inode can't go away until all the pages are gone
+ * and the pages won't go away while there is still
+ * an ordered extent and the ordered extent won't go
+ * away until it is off this list. So, we can safely
+ * increment i_count here and call iput later
+ */
+ atomic_inc(&inode->i_count);
+ spin_unlock(&root->fs_info->ordered_extent_lock);
+
+ btrfs_start_ordered_extent(inode, ordered, 1);
+ btrfs_put_ordered_extent(ordered);
+ iput(inode);
+
+ spin_lock(&root->fs_info->ordered_extent_lock);
+ }
+ spin_unlock(&root->fs_info->ordered_extent_lock);
+ return 0;
+}
+
/*
* Used to start IO or wait for a given ordered extent to finish.
*
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 199cb0b..5efe6b6 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -80,6 +80,9 @@ struct btrfs_ordered_extent {
/* reference count */
atomic_t refs;
+ /* the inode we belong to */
+ struct inode *inode;
+
/* list of checksums for insertion when the extent io is done */
struct list_head list;
@@ -88,6 +91,9 @@ struct btrfs_ordered_extent {
/* our friendly rbtree entry */
struct rb_node rb_node;
+
+ /* a per root list of all the pending ordered extents */
+ struct list_head root_extent_list;
};
@@ -137,4 +143,5 @@ int btrfs_wait_on_page_writeback_range(struct address_space *mapping,
pgoff_t start, pgoff_t end);
int btrfs_fdatawrite_range(struct address_space *mapping, loff_t start,
loff_t end, int sync_mode);
+int btrfs_wait_ordered_extents(struct btrfs_root *root);
#endif
generated by cgit v1.1 at 2024-06-12 15:42:21 +0000