struct btrfs_root *root, struct btrfs_path *path,
u64 isize);
/* inode.c */
+int btrfs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc);
int btrfs_create_subvol_root(struct btrfs_root *new_root,
struct btrfs_trans_handle *trans, u64 new_dirid,
struct btrfs_block_group_cache *block_group);
spin_lock_init(&tree->lock);
spin_lock_init(&tree->buffer_lock);
tree->mapping = mapping;
- tree->last = NULL;
}
EXPORT_SYMBOL(extent_io_tree_init);
struct tree_entry *entry;
struct tree_entry *prev_entry = NULL;
- if (tree->last) {
- struct extent_state *state;
- state = tree->last;
- if (state->start <= offset && offset <= state->end)
- return &tree->last->rb_node;
- }
while(n) {
entry = rb_entry(n, struct tree_entry, rb_node);
prev = n;
else if (offset > entry->end)
n = n->rb_right;
else {
- tree->last = rb_entry(n, struct extent_state, rb_node);
return n;
}
}
ret = __etree_search(tree, offset, &prev, NULL);
if (!ret) {
- if (prev) {
- tree->last = rb_entry(prev, struct extent_state,
- rb_node);
- }
return prev;
}
return ret;
other->state == state->state) {
state->start = other->start;
other->tree = NULL;
- if (tree->last == other)
- tree->last = state;
rb_erase(&other->rb_node, &tree->state);
free_extent_state(other);
}
other->state == state->state) {
other->start = state->start;
state->tree = NULL;
- if (tree->last == state)
- tree->last = other;
rb_erase(&state->rb_node, &tree->state);
free_extent_state(state);
}
return -EEXIST;
}
state->tree = tree;
- tree->last = state;
merge_state(tree, state);
return 0;
}
if (delete || state->state == 0) {
if (state->tree) {
clear_state_cb(tree, state, state->state);
- if (tree->last == state) {
- tree->last = extent_state_next(state);
- }
rb_erase(&state->rb_node, &tree->state);
state->tree = NULL;
free_extent_state(state);
spinlock_t lock;
spinlock_t buffer_lock;
struct extent_io_ops *ops;
- struct extent_state *last;
};
struct extent_state {
void extent_map_tree_init(struct extent_map_tree *tree, gfp_t mask)
{
tree->map.rb_node = NULL;
- tree->last = NULL;
spin_lock_init(&tree->lock);
}
EXPORT_SYMBOL(extent_map_tree_init);
merge->in_tree = 0;
free_extent_map(merge);
}
- tree->last = em;
out:
return ret;
}
u64 end = range_end(start, len);
BUG_ON(spin_trylock(&tree->lock));
- em = tree->last;
- if (em && end > em->start && start < extent_map_end(em))
- goto found;
-
rb_node = __tree_search(&tree->map, start, &prev, &next);
if (!rb_node && prev) {
em = rb_entry(prev, struct extent_map, rb_node);
found:
atomic_inc(&em->refs);
- tree->last = em;
out:
return em;
}
BUG_ON(spin_trylock(&tree->lock));
rb_erase(&em->rb_node, &tree->map);
em->in_tree = 0;
- if (tree->last == em)
- tree->last = NULL;
return ret;
}
EXPORT_SYMBOL(remove_extent_mapping);
struct extent_map_tree {
struct rb_root map;
- struct extent_map *last;
spinlock_t lock;
};
break;
}
if (test_bit(EXTENT_FLAG_PINNED, &em->flags)) {
- start = em->start + em->len;
- free_extent_map(em);
- spin_unlock(&em_tree->lock);
- if (start < end) {
- len = end - start + 1;
- continue;
- }
- break;
+ printk(KERN_CRIT "inode %lu trying to drop pinned "
+ "extent start %llu end %llu, em [%llu %llu]\n",
+ inode->i_ino,
+ (unsigned long long)start,
+ (unsigned long long)end,
+ (unsigned long long)em->start,
+ (unsigned long long)em->len);
}
remove_extent_mapping(em_tree, em);
fixup = kzalloc(sizeof(*fixup), GFP_NOFS);
if (!fixup)
return -EAGAIN;
-printk("queueing worker to fixup page %lu %Lu\n", inode->i_ino, page_offset(page));
+
SetPageChecked(page);
page_cache_get(page);
fixup->work.func = btrfs_writepage_fixup_worker;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct extent_map *em;
+ struct extent_map *em_orig;
u64 alloc_hint = 0;
u64 clear_start;
u64 clear_end;
struct list_head list;
struct btrfs_key ins;
+ struct rb_node *rb;
int ret;
ret = btrfs_dec_test_ordered_pending(inode, start, end - start + 1);
mutex_lock(&BTRFS_I(inode)->extent_mutex);
+ spin_lock(&em_tree->lock);
+ clear_start = ordered_extent->file_offset;
+ clear_end = ordered_extent->file_offset + ordered_extent->len;
+ em = lookup_extent_mapping(em_tree, clear_start,
+ ordered_extent->len);
+ em_orig = em;
+ while(em && clear_start < extent_map_end(em) && clear_end > em->start) {
+ clear_bit(EXTENT_FLAG_PINNED, &em->flags);
+ rb = rb_next(&em->rb_node);
+ if (!rb)
+ break;
+ em = rb_entry(rb, struct extent_map, rb_node);
+ }
+ free_extent_map(em_orig);
+ spin_unlock(&em_tree->lock);
+
ret = btrfs_drop_extents(trans, root, inode,
ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->len, 0);
BUG_ON(ret);
- spin_lock(&em_tree->lock);
- clear_start = ordered_extent->file_offset;
- clear_end = ordered_extent->file_offset + ordered_extent->len;
- while(clear_start < clear_end) {
- em = lookup_extent_mapping(em_tree, clear_start,
- clear_end - clear_start);
- if (em) {
- clear_bit(EXTENT_FLAG_PINNED, &em->flags);
- clear_start = em->start + em->len;
- free_extent_map(em);
- } else {
- break;
- }
- }
- spin_unlock(&em_tree->lock);
-
btrfs_drop_extent_cache(inode, ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->len - 1);
u64 extent_end = 0;
u64 objectid = inode->i_ino;
u32 found_type;
- struct btrfs_path *path;
+ struct btrfs_path *path = NULL;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_file_extent_item *item;
struct extent_buffer *leaf;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct btrfs_trans_handle *trans = NULL;
- path = btrfs_alloc_path();
- BUG_ON(!path);
-
again:
spin_lock(&em_tree->lock);
em = lookup_extent_mapping(em_tree, start, len);
em->bdev = root->fs_info->fs_devices->latest_bdev;
em->start = EXTENT_MAP_HOLE;
em->len = (u64)-1;
+
+ if (!path) {
+ path = btrfs_alloc_path();
+ BUG_ON(!path);
+ }
+
ret = btrfs_lookup_file_extent(trans, root, path,
objectid, start, trans != NULL);
if (ret < 0) {
}
spin_unlock(&em_tree->lock);
out:
- btrfs_free_path(path);
+ if (path)
+ btrfs_free_path(path);
if (trans) {
ret = btrfs_end_transaction(trans, root);
if (!err) {
return extent_write_full_page(tree, page, btrfs_get_extent, wbc);
}
-static int btrfs_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
+int btrfs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
{
struct extent_io_tree *tree;
tree = &BTRFS_I(mapping->host)->io_tree;
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
+#include <linux/writeback.h>
+#include <linux/pagevec.h>
#include "ctree.h"
#include "transaction.h"
#include "btrfs_inode.h"
* start IO on any dirty ones so the wait doesn't stall waiting
* for pdflush to find them
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
- do_sync_file_range(file, start, end, SYNC_FILE_RANGE_WRITE);
-#else
- do_sync_mapping_range(inode->i_mapping, start, end,
- SYNC_FILE_RANGE_WRITE);
-#endif
+ btrfs_fdatawrite_range(inode->i_mapping, start, end, WB_SYNC_NONE);
if (wait)
wait_event(entry->wait, test_bit(BTRFS_ORDERED_COMPLETE,
&entry->flags));
u64 orig_end;
u64 wait_end;
struct btrfs_ordered_extent *ordered;
- u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
if (start + len < start) {
- wait_end = (inode->i_size + mask) & ~mask;
- orig_end = (u64)-1;
+ orig_end = INT_LIMIT(loff_t);
} else {
orig_end = start + len - 1;
- wait_end = orig_end;
+ if (orig_end > INT_LIMIT(loff_t))
+ orig_end = INT_LIMIT(loff_t);
}
+ wait_end = orig_end;
again:
/* start IO across the range first to instantiate any delalloc
* extents
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
- do_sync_file_range(file, start, wait_end, SYNC_FILE_RANGE_WRITE);
-#else
- do_sync_mapping_range(inode->i_mapping, start, wait_end,
- SYNC_FILE_RANGE_WRITE);
-#endif
- end = orig_end;
- wait_on_extent_writeback(&BTRFS_I(inode)->io_tree, start, orig_end);
+ btrfs_fdatawrite_range(inode->i_mapping, start, orig_end, WB_SYNC_NONE);
+
+ btrfs_wait_on_page_writeback_range(inode->i_mapping,
+ start >> PAGE_CACHE_SHIFT,
+ orig_end >> PAGE_CACHE_SHIFT);
+ end = orig_end;
while(1) {
ordered = btrfs_lookup_first_ordered_extent(inode, end);
if (!ordered) {
return ret;
}
+
+/**
+ * taken from mm/filemap.c because it isn't exported
+ *
+ * __filemap_fdatawrite_range - start writeback on mapping dirty pages in range
+ * @mapping: address space structure to write
+ * @start: offset in bytes where the range starts
+ * @end: offset in bytes where the range ends (inclusive)
+ * @sync_mode: enable synchronous operation
+ *
+ * Start writeback against all of a mapping's dirty pages that lie
+ * within the byte offsets <start, end> inclusive.
+ *
+ * If sync_mode is WB_SYNC_ALL then this is a "data integrity" operation, as
+ * opposed to a regular memory cleansing writeback. The difference between
+ * these two operations is that if a dirty page/buffer is encountered, it must
+ * be waited upon, and not just skipped over.
+ */
+int btrfs_fdatawrite_range(struct address_space *mapping, loff_t start,
+ loff_t end, int sync_mode)
+{
+ struct writeback_control wbc = {
+ .sync_mode = sync_mode,
+ .nr_to_write = mapping->nrpages * 2,
+ .range_start = start,
+ .range_end = end,
+ .for_writepages = 1,
+ };
+ return btrfs_writepages(mapping, &wbc);
+}
+
+/**
+ * taken from mm/filemap.c because it isn't exported
+ *
+ * wait_on_page_writeback_range - wait for writeback to complete
+ * @mapping: target address_space
+ * @start: beginning page index
+ * @end: ending page index
+ *
+ * Wait for writeback to complete against pages indexed by start->end
+ * inclusive
+ */
+int btrfs_wait_on_page_writeback_range(struct address_space *mapping,
+ pgoff_t start, pgoff_t end)
+{
+ struct pagevec pvec;
+ int nr_pages;
+ int ret = 0;
+ pgoff_t index;
+
+ if (end < start)
+ return 0;
+
+ pagevec_init(&pvec, 0);
+ index = start;
+ while ((index <= end) &&
+ (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_WRITEBACK,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1)) != 0) {
+ unsigned i;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ /* until radix tree lookup accepts end_index */
+ if (page->index > end)
+ continue;
+
+ wait_on_page_writeback(page);
+ if (PageError(page))
+ ret = -EIO;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+
+ /* Check for outstanding write errors */
+ if (test_and_clear_bit(AS_ENOSPC, &mapping->flags))
+ ret = -ENOSPC;
+ if (test_and_clear_bit(AS_EIO, &mapping->flags))
+ ret = -EIO;
+
+ return ret;
+}
int btrfs_ordered_update_i_size(struct inode *inode,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u32 *sum);
+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);
#endif
extent_io_tree_init(pinned_copy,
root->fs_info->btree_inode->i_mapping, GFP_NOFS);
-printk("commit trans %Lu\n", trans->transid);
trans->transaction->in_commit = 1;
trans->transaction->blocked = 1;
cur_trans = trans->transaction;
list_splice_init(&dirty_fs_roots, &root->fs_info->dead_roots);
mutex_unlock(&root->fs_info->trans_mutex);
-printk("done commit trans %Lu\n", trans->transid);
kmem_cache_free(btrfs_trans_handle_cachep, trans);
if (root->fs_info->closing) {
projects / users / hch / configfs.git / commitdiff