* Boston, MA 021110-1307, USA.
*/
-#include <linux/version.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/scatterlist.h>
#include <linux/swap.h>
#include <linux/radix-tree.h>
#include <linux/writeback.h>
-#include <linux/buffer_head.h> // for block_sync_page
+#include <linux/buffer_head.h>
#include <linux/workqueue.h>
#include <linux/kthread.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
-# include <linux/freezer.h>
-#else
-# include <linux/sched.h>
-#endif
+#include <linux/freezer.h>
+#include "compat.h"
#include "crc32c.h"
#include "ctree.h"
#include "disk-io.h"
#include "ref-cache.h"
#include "tree-log.h"
-#if 0
-static int check_tree_block(struct btrfs_root *root, struct extent_buffer *buf)
-{
- if (extent_buffer_blocknr(buf) != btrfs_header_blocknr(buf)) {
- printk(KERN_CRIT "buf blocknr(buf) is %llu, header is %llu\n",
- (unsigned long long)extent_buffer_blocknr(buf),
- (unsigned long long)btrfs_header_blocknr(buf));
- return 1;
- }
- return 0;
-}
-#endif
-
static struct extent_io_ops btree_extent_io_ops;
static void end_workqueue_fn(struct btrfs_work *work);
+/*
+ * end_io_wq structs are used to do processing in task context when an IO is
+ * complete. This is used during reads to verify checksums, and it is used
+ * by writes to insert metadata for new file extents after IO is complete.
+ */
struct end_io_wq {
struct bio *bio;
bio_end_io_t *end_io;
struct btrfs_work work;
};
+/*
+ * async submit bios are used to offload expensive checksumming
+ * onto the worker threads. They checksum file and metadata bios
+ * just before they are sent down the IO stack.
+ */
struct async_submit_bio {
struct inode *inode;
struct bio *bio;
struct list_head list;
- extent_submit_bio_hook_t *submit_bio_hook;
+ extent_submit_bio_hook_t *submit_bio_start;
+ extent_submit_bio_hook_t *submit_bio_done;
int rw;
int mirror_num;
+ unsigned long bio_flags;
struct btrfs_work work;
};
-struct extent_map *btree_get_extent(struct inode *inode, struct page *page,
- size_t page_offset, u64 start, u64 len,
- int create)
+/* These are used to set the lockdep class on the extent buffer locks.
+ * The class is set by the readpage_end_io_hook after the buffer has
+ * passed csum validation but before the pages are unlocked.
+ *
+ * The lockdep class is also set by btrfs_init_new_buffer on freshly
+ * allocated blocks.
+ *
+ * The class is based on the level in the tree block, which allows lockdep
+ * to know that lower nodes nest inside the locks of higher nodes.
+ *
+ * We also add a check to make sure the highest level of the tree is
+ * the same as our lockdep setup here. If BTRFS_MAX_LEVEL changes, this
+ * code needs update as well.
+ */
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# if BTRFS_MAX_LEVEL != 8
+# error
+# endif
+static struct lock_class_key btrfs_eb_class[BTRFS_MAX_LEVEL + 1];
+static const char *btrfs_eb_name[BTRFS_MAX_LEVEL + 1] = {
+ /* leaf */
+ "btrfs-extent-00",
+ "btrfs-extent-01",
+ "btrfs-extent-02",
+ "btrfs-extent-03",
+ "btrfs-extent-04",
+ "btrfs-extent-05",
+ "btrfs-extent-06",
+ "btrfs-extent-07",
+ /* highest possible level */
+ "btrfs-extent-08",
+};
+#endif
+
+/*
+ * extents on the btree inode are pretty simple, there's one extent
+ * that covers the entire device
+ */
+static struct extent_map *btree_get_extent(struct inode *inode,
+ struct page *page, size_t page_offset, u64 start, u64 len,
+ int create)
{
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
struct extent_map *em;
}
em->start = 0;
em->len = (u64)-1;
+ em->block_len = (u64)-1;
em->block_start = 0;
em->bdev = BTRFS_I(inode)->root->fs_info->fs_devices->latest_bdev;
u64 failed_start = em->start;
u64 failed_len = em->len;
- printk("failed to insert %Lu %Lu -> %Lu into tree\n",
- em->start, em->len, em->block_start);
free_extent_map(em);
em = lookup_extent_mapping(em_tree, start, len);
if (em) {
- printk("after failing, found %Lu %Lu %Lu\n",
- em->start, em->len, em->block_start);
ret = 0;
} else {
em = lookup_extent_mapping(em_tree, failed_start,
failed_len);
- if (em) {
- printk("double failure lookup gives us "
- "%Lu %Lu -> %Lu\n", em->start,
- em->len, em->block_start);
- free_extent_map(em);
- }
ret = -EIO;
}
} else if (ret) {
*(__le32 *)result = ~cpu_to_le32(crc);
}
+/*
+ * compute the csum for a btree block, and either verify it or write it
+ * into the csum field of the block.
+ */
static int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
int verify)
{
- char result[BTRFS_CRC32_SIZE];
+ u16 csum_size =
+ btrfs_super_csum_size(&root->fs_info->super_copy);
+ char *result = NULL;
unsigned long len;
unsigned long cur_len;
unsigned long offset = BTRFS_CSUM_SIZE;
unsigned long map_len;
int err;
u32 crc = ~(u32)0;
+ unsigned long inline_result;
len = buf->len - offset;
- while(len > 0) {
+ while (len > 0) {
err = map_private_extent_buffer(buf, offset, 32,
&map_token, &kaddr,
&map_start, &map_len, KM_USER0);
- if (err) {
- printk("failed to map extent buffer! %lu\n",
- offset);
+ if (err)
return 1;
- }
cur_len = min(len, map_len - (offset - map_start));
crc = btrfs_csum_data(root, kaddr + offset - map_start,
crc, cur_len);
offset += cur_len;
unmap_extent_buffer(buf, map_token, KM_USER0);
}
+ if (csum_size > sizeof(inline_result)) {
+ result = kzalloc(csum_size * sizeof(char), GFP_NOFS);
+ if (!result)
+ return 1;
+ } else {
+ result = (char *)&inline_result;
+ }
+
btrfs_csum_final(crc, result);
if (verify) {
- /* FIXME, this is not good */
- if (memcmp_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE)) {
+ if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
u32 val;
u32 found = 0;
- memcpy(&found, result, BTRFS_CRC32_SIZE);
+ memcpy(&found, result, csum_size);
- read_extent_buffer(buf, &val, 0, BTRFS_CRC32_SIZE);
- printk("btrfs: %s checksum verify failed on %llu "
- "wanted %X found %X level %d\n",
+ read_extent_buffer(buf, &val, 0, csum_size);
+ printk(KERN_INFO "btrfs: %s checksum verify failed "
+ "on %llu wanted %X found %X level %d\n",
root->fs_info->sb->s_id,
buf->start, val, found, btrfs_header_level(buf));
+ if (result != (char *)&inline_result)
+ kfree(result);
return 1;
}
} else {
- write_extent_buffer(buf, result, 0, BTRFS_CRC32_SIZE);
+ write_extent_buffer(buf, result, 0, csum_size);
}
+ if (result != (char *)&inline_result)
+ kfree(result);
return 0;
}
+/*
+ * we can't consider a given block up to date unless the transid of the
+ * block matches the transid in the parent node's pointer. This is how we
+ * detect blocks that either didn't get written at all or got written
+ * in the wrong place.
+ */
static int verify_parent_transid(struct extent_io_tree *io_tree,
struct extent_buffer *eb, u64 parent_transid)
{
unlock_extent(io_tree, eb->start, eb->start + eb->len - 1,
GFP_NOFS);
return ret;
-
}
+/*
+ * helper to read a given tree block, doing retries as required when
+ * the checksums don't match and we have alternate mirrors to try.
+ */
static int btree_read_extent_buffer_pages(struct btrfs_root *root,
struct extent_buffer *eb,
u64 start, u64 parent_transid)
if (!ret &&
!verify_parent_transid(io_tree, eb, parent_transid))
return ret;
-printk("read extent buffer pages failed with ret %d mirror no %d\n", ret, mirror_num);
+
num_copies = btrfs_num_copies(&root->fs_info->mapping_tree,
eb->start, eb->len);
if (num_copies == 1)
return -EIO;
}
-int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
+/*
+ * checksum a dirty tree block before IO. This has extra checks to make sure
+ * we only fill in the checksum field in the first page of a multi-page block
+ */
+
+static int csum_dirty_buffer(struct btrfs_root *root, struct page *page)
{
struct extent_io_tree *tree;
u64 start = (u64)page->index << PAGE_CACHE_SHIFT;
if (!page->private)
goto out;
len = page->private >> 2;
- if (len == 0) {
- WARN_ON(1);
- }
+ WARN_ON(len == 0);
+
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE,
btrfs_header_generation(eb));
BUG_ON(ret);
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
- printk("warning: eb start incorrect %Lu buffer %Lu len %lu\n",
- start, found_start, len);
WARN_ON(1);
goto err;
}
if (eb->first_page != page) {
- printk("bad first page %lu %lu\n", eb->first_page->index,
- page->index);
WARN_ON(1);
goto err;
}
if (!PageUptodate(page)) {
- printk("csum not up to date page %lu\n", page->index);
WARN_ON(1);
goto err;
}
return 0;
}
-static int btree_writepage_io_hook(struct page *page, u64 start, u64 end)
+static int check_tree_block_fsid(struct btrfs_root *root,
+ struct extent_buffer *eb)
{
- struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
+ struct btrfs_fs_devices *fs_devices = root->fs_info->fs_devices;
+ u8 fsid[BTRFS_UUID_SIZE];
+ int ret = 1;
+
+ read_extent_buffer(eb, fsid, (unsigned long)btrfs_header_fsid(eb),
+ BTRFS_FSID_SIZE);
+ while (fs_devices) {
+ if (!memcmp(fsid, fs_devices->fsid, BTRFS_FSID_SIZE)) {
+ ret = 0;
+ break;
+ }
+ fs_devices = fs_devices->seed;
+ }
+ return ret;
+}
- csum_dirty_buffer(root, page);
- return 0;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+void btrfs_set_buffer_lockdep_class(struct extent_buffer *eb, int level)
+{
+ lockdep_set_class_and_name(&eb->lock,
+ &btrfs_eb_class[level],
+ btrfs_eb_name[level]);
}
+#endif
-int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
+static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
struct extent_state *state)
{
struct extent_io_tree *tree;
goto out;
if (!page->private)
goto out;
+
len = page->private >> 2;
- if (len == 0) {
- WARN_ON(1);
- }
+ WARN_ON(len == 0);
+
eb = alloc_extent_buffer(tree, start, len, page, GFP_NOFS);
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
- printk("bad tree block start %llu %llu\n",
+ printk(KERN_INFO "btrfs bad tree block start %llu %llu\n",
(unsigned long long)found_start,
(unsigned long long)eb->start);
ret = -EIO;
goto err;
}
if (eb->first_page != page) {
- printk("bad first page %lu %lu\n", eb->first_page->index,
- page->index);
+ printk(KERN_INFO "btrfs bad first page %lu %lu\n",
+ eb->first_page->index, page->index);
WARN_ON(1);
ret = -EIO;
goto err;
}
- if (memcmp_extent_buffer(eb, root->fs_info->fsid,
- (unsigned long)btrfs_header_fsid(eb),
- BTRFS_FSID_SIZE)) {
- printk("bad fsid on block %Lu\n", eb->start);
+ if (check_tree_block_fsid(root, eb)) {
+ printk(KERN_INFO "btrfs bad fsid on block %llu\n",
+ (unsigned long long)eb->start);
ret = -EIO;
goto err;
}
found_level = btrfs_header_level(eb);
+ btrfs_set_buffer_lockdep_class(eb, found_level);
+
ret = csum_tree_block(root, eb, 1);
if (ret)
ret = -EIO;
return ret;
}
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)
static void end_workqueue_bio(struct bio *bio, int err)
-#else
-static int end_workqueue_bio(struct bio *bio,
- unsigned int bytes_done, int err)
-#endif
{
struct end_io_wq *end_io_wq = bio->bi_private;
struct btrfs_fs_info *fs_info;
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
- if (bio->bi_size)
- return 1;
-#endif
-
fs_info = end_io_wq->info;
end_io_wq->error = err;
end_io_wq->work.func = end_workqueue_fn;
end_io_wq->work.flags = 0;
- if (bio->bi_rw & (1 << BIO_RW))
- btrfs_queue_worker(&fs_info->endio_write_workers,
- &end_io_wq->work);
- else
- btrfs_queue_worker(&fs_info->endio_workers, &end_io_wq->work);
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
- return 0;
-#endif
+ if (bio->bi_rw & (1 << BIO_RW)) {
+ if (end_io_wq->metadata)
+ btrfs_queue_worker(&fs_info->endio_meta_write_workers,
+ &end_io_wq->work);
+ else
+ btrfs_queue_worker(&fs_info->endio_write_workers,
+ &end_io_wq->work);
+ } else {
+ if (end_io_wq->metadata)
+ btrfs_queue_worker(&fs_info->endio_meta_workers,
+ &end_io_wq->work);
+ else
+ btrfs_queue_worker(&fs_info->endio_workers,
+ &end_io_wq->work);
+ }
}
int btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
btrfs_async_submit_limit(info);
}
-static void run_one_async_submit(struct btrfs_work *work)
+static void run_one_async_start(struct btrfs_work *work)
+{
+ struct btrfs_fs_info *fs_info;
+ struct async_submit_bio *async;
+
+ async = container_of(work, struct async_submit_bio, work);
+ fs_info = BTRFS_I(async->inode)->root->fs_info;
+ async->submit_bio_start(async->inode, async->rw, async->bio,
+ async->mirror_num, async->bio_flags);
+}
+
+static void run_one_async_done(struct btrfs_work *work)
{
struct btrfs_fs_info *fs_info;
struct async_submit_bio *async;
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
- async->submit_bio_hook(async->inode, async->rw, async->bio,
- async->mirror_num);
+ async->submit_bio_done(async->inode, async->rw, async->bio,
+ async->mirror_num, async->bio_flags);
+}
+
+static void run_one_async_free(struct btrfs_work *work)
+{
+ struct async_submit_bio *async;
+
+ async = container_of(work, struct async_submit_bio, work);
kfree(async);
}
int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
int rw, struct bio *bio, int mirror_num,
- extent_submit_bio_hook_t *submit_bio_hook)
+ unsigned long bio_flags,
+ extent_submit_bio_hook_t *submit_bio_start,
+ extent_submit_bio_hook_t *submit_bio_done)
{
struct async_submit_bio *async;
- int limit = btrfs_async_submit_limit(fs_info);
async = kmalloc(sizeof(*async), GFP_NOFS);
if (!async)
async->rw = rw;
async->bio = bio;
async->mirror_num = mirror_num;
- async->submit_bio_hook = submit_bio_hook;
- async->work.func = run_one_async_submit;
+ async->submit_bio_start = submit_bio_start;
+ async->submit_bio_done = submit_bio_done;
+
+ async->work.func = run_one_async_start;
+ async->work.ordered_func = run_one_async_done;
+ async->work.ordered_free = run_one_async_free;
+
async->work.flags = 0;
+ async->bio_flags = bio_flags;
+
atomic_inc(&fs_info->nr_async_submits);
btrfs_queue_worker(&fs_info->workers, &async->work);
-
+#if 0
+ int limit = btrfs_async_submit_limit(fs_info);
if (atomic_read(&fs_info->nr_async_submits) > limit) {
wait_event_timeout(fs_info->async_submit_wait,
(atomic_read(&fs_info->nr_async_submits) < limit),
(atomic_read(&fs_info->nr_async_bios) < limit),
HZ/10);
}
+#endif
+ while (atomic_read(&fs_info->async_submit_draining) &&
+ atomic_read(&fs_info->nr_async_submits)) {
+ wait_event(fs_info->async_submit_wait,
+ (atomic_read(&fs_info->nr_async_submits) == 0));
+ }
+
return 0;
}
-static int __btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
- int mirror_num)
+static int btree_csum_one_bio(struct bio *bio)
{
- struct btrfs_root *root = BTRFS_I(inode)->root;
- u64 offset;
- int ret;
+ struct bio_vec *bvec = bio->bi_io_vec;
+ int bio_index = 0;
+ struct btrfs_root *root;
- offset = bio->bi_sector << 9;
+ WARN_ON(bio->bi_vcnt <= 0);
+ while (bio_index < bio->bi_vcnt) {
+ root = BTRFS_I(bvec->bv_page->mapping->host)->root;
+ csum_dirty_buffer(root, bvec->bv_page);
+ bio_index++;
+ bvec++;
+ }
+ return 0;
+}
+static int __btree_submit_bio_start(struct inode *inode, int rw,
+ struct bio *bio, int mirror_num,
+ unsigned long bio_flags)
+{
/*
* when we're called for a write, we're already in the async
* submission context. Just jump into btrfs_map_bio
*/
- if (rw & (1 << BIO_RW)) {
- return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
- mirror_num, 1);
- }
+ btree_csum_one_bio(bio);
+ return 0;
+}
+static int __btree_submit_bio_done(struct inode *inode, int rw, struct bio *bio,
+ int mirror_num, unsigned long bio_flags)
+{
/*
- * called for a read, do the setup so that checksum validation
- * can happen in the async kernel threads
+ * when we're called for a write, we're already in the async
+ * submission context. Just jump into btrfs_map_bio
*/
- ret = btrfs_bio_wq_end_io(root->fs_info, bio, 1);
- BUG_ON(ret);
-
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio, mirror_num, 1);
}
static int btree_submit_bio_hook(struct inode *inode, int rw, struct bio *bio,
- int mirror_num)
+ int mirror_num, unsigned long bio_flags)
{
+ int ret;
+
+ ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info,
+ bio, 1);
+ BUG_ON(ret);
+
+ if (!(rw & (1 << BIO_RW))) {
+ /*
+ * called for a read, do the setup so that checksum validation
+ * can happen in the async kernel threads
+ */
+ return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
+ mirror_num, 0);
+ }
/*
* kthread helpers are used to submit writes so that checksumming
* can happen in parallel across all CPUs
*/
- if (!(rw & (1 << BIO_RW))) {
- return __btree_submit_bio_hook(inode, rw, bio, mirror_num);
- }
return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info,
- inode, rw, bio, mirror_num,
- __btree_submit_bio_hook);
+ inode, rw, bio, mirror_num, 0,
+ __btree_submit_bio_start,
+ __btree_submit_bio_done);
}
static int btree_writepage(struct page *page, struct writeback_control *wbc)
if (wbc->sync_mode == WB_SYNC_NONE) {
u64 num_dirty;
u64 start = 0;
- unsigned long thresh = 8 * 1024 * 1024;
+ unsigned long thresh = 32 * 1024 * 1024;
if (wbc->for_kupdate)
return 0;
num_dirty = count_range_bits(tree, &start, (u64)-1,
thresh, EXTENT_DIRTY);
- if (num_dirty < thresh) {
+ if (num_dirty < thresh)
return 0;
- }
}
return extent_writepages(tree, mapping, btree_get_extent, wbc);
}
-int btree_readpage(struct file *file, struct page *page)
+static int btree_readpage(struct file *file, struct page *page)
{
struct extent_io_tree *tree;
tree = &BTRFS_I(page->mapping->host)->io_tree;
int ret;
if (PageWriteback(page) || PageDirty(page))
- return 0;
+ return 0;
tree = &BTRFS_I(page->mapping->host)->io_tree;
map = &BTRFS_I(page->mapping->host)->extent_tree;
ret = try_release_extent_state(map, tree, page, gfp_flags);
- if (!ret) {
+ if (!ret)
return 0;
- }
ret = try_release_extent_buffer(tree, page);
if (ret == 1) {
extent_invalidatepage(tree, page, offset);
btree_releasepage(page, GFP_NOFS);
if (PagePrivate(page)) {
- printk("warning page private not zero on page %Lu\n",
- page_offset(page));
+ printk(KERN_WARNING "btrfs warning page private not zero "
+ "on page %llu\n", (unsigned long long)page_offset(page));
ClearPagePrivate(page);
set_page_private(page, 0);
page_cache_release(page);
int btrfs_write_tree_block(struct extent_buffer *buf)
{
return btrfs_fdatawrite_range(buf->first_page->mapping, buf->start,
- buf->start + buf->len - 1, WB_SYNC_NONE);
+ buf->start + buf->len - 1, WB_SYNC_ALL);
}
int btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
{
return btrfs_wait_on_page_writeback_range(buf->first_page->mapping,
- buf->start, buf->start + buf->len -1);
+ buf->start, buf->start + buf->len - 1);
}
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
- if (ret == 0) {
- buf->flags |= EXTENT_UPTODATE;
- } else {
+ if (ret == 0)
+ set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags);
+ else
WARN_ON(1);
- }
return buf;
}
struct inode *btree_inode = root->fs_info->btree_inode;
if (btrfs_header_generation(buf) ==
root->fs_info->running_transaction->transid) {
- WARN_ON(!btrfs_tree_locked(buf));
+ btrfs_assert_tree_locked(buf);
+
+ /* ugh, clear_extent_buffer_dirty can be expensive */
+ btrfs_set_lock_blocking(buf);
+
clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree,
buf);
}
u64 objectid)
{
root->node = NULL;
- root->inode = NULL;
root->commit_root = NULL;
root->ref_tree = NULL;
root->sectorsize = sectorsize;
spin_lock_init(&root->list_lock);
mutex_init(&root->objectid_mutex);
mutex_init(&root->log_mutex);
+ init_waitqueue_head(&root->log_writer_wait);
+ init_waitqueue_head(&root->log_commit_wait[0]);
+ init_waitqueue_head(&root->log_commit_wait[1]);
+ atomic_set(&root->log_commit[0], 0);
+ atomic_set(&root->log_commit[1], 0);
+ atomic_set(&root->log_writers, 0);
+ root->log_batch = 0;
+ root->log_transid = 0;
extent_io_tree_init(&root->dirty_log_pages,
fs_info->btree_inode->i_mapping, GFP_NOFS);
root->defrag_running = 0;
root->defrag_level = 0;
root->root_key.objectid = objectid;
+ root->anon_super.s_root = NULL;
+ root->anon_super.s_dev = 0;
+ INIT_LIST_HEAD(&root->anon_super.s_list);
+ INIT_LIST_HEAD(&root->anon_super.s_instances);
+ init_rwsem(&root->anon_super.s_umount);
+
return 0;
}
{
int ret;
u32 blocksize;
+ u64 generation;
__setup_root(tree_root->nodesize, tree_root->leafsize,
tree_root->sectorsize, tree_root->stripesize,
&root->root_item, &root->root_key);
BUG_ON(ret);
+ generation = btrfs_root_generation(&root->root_item);
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
- blocksize, 0);
+ blocksize, generation);
BUG_ON(!root->node);
return 0;
}
if (!log_root_tree)
return 0;
- while(1) {
+ while (1) {
ret = find_first_extent_bit(&log_root_tree->dirty_log_pages,
0, &start, &end, EXTENT_DIRTY);
if (ret)
return 0;
}
-int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
- struct btrfs_fs_info *fs_info)
+static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct btrfs_root *tree_root = fs_info->tree_root;
+ struct extent_buffer *leaf;
root = kzalloc(sizeof(*root), GFP_NOFS);
if (!root)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
__setup_root(tree_root->nodesize, tree_root->leafsize,
tree_root->sectorsize, tree_root->stripesize,
root->root_key.objectid = BTRFS_TREE_LOG_OBJECTID;
root->root_key.type = BTRFS_ROOT_ITEM_KEY;
root->root_key.offset = BTRFS_TREE_LOG_OBJECTID;
+ /*
+ * log trees do not get reference counted because they go away
+ * before a real commit is actually done. They do store pointers
+ * to file data extents, and those reference counts still get
+ * updated (along with back refs to the log tree).
+ */
root->ref_cows = 0;
- root->node = btrfs_alloc_free_block(trans, root, root->leafsize,
- BTRFS_TREE_LOG_OBJECTID,
- 0, 0, 0, 0, 0);
+ leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
+ 0, BTRFS_TREE_LOG_OBJECTID,
+ trans->transid, 0, 0, 0);
+ if (IS_ERR(leaf)) {
+ kfree(root);
+ return ERR_CAST(leaf);
+ }
+ root->node = leaf;
btrfs_set_header_nritems(root->node, 0);
btrfs_set_header_level(root->node, 0);
btrfs_set_header_bytenr(root->node, root->node->start);
BTRFS_FSID_SIZE);
btrfs_mark_buffer_dirty(root->node);
btrfs_tree_unlock(root->node);
- fs_info->log_root_tree = root;
+ return root;
+}
+
+int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_fs_info *fs_info)
+{
+ struct btrfs_root *log_root;
+
+ log_root = alloc_log_tree(trans, fs_info);
+ if (IS_ERR(log_root))
+ return PTR_ERR(log_root);
+ WARN_ON(fs_info->log_root_tree);
+ fs_info->log_root_tree = log_root;
+ return 0;
+}
+
+int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root)
+{
+ struct btrfs_root *log_root;
+ struct btrfs_inode_item *inode_item;
+
+ log_root = alloc_log_tree(trans, root->fs_info);
+ if (IS_ERR(log_root))
+ return PTR_ERR(log_root);
+
+ log_root->last_trans = trans->transid;
+ log_root->root_key.offset = root->root_key.objectid;
+
+ inode_item = &log_root->root_item.inode;
+ inode_item->generation = cpu_to_le64(1);
+ inode_item->size = cpu_to_le64(3);
+ inode_item->nlink = cpu_to_le32(1);
+ inode_item->nbytes = cpu_to_le64(root->leafsize);
+ inode_item->mode = cpu_to_le32(S_IFDIR | 0755);
+
+ btrfs_set_root_bytenr(&log_root->root_item, log_root->node->start);
+ btrfs_set_root_generation(&log_root->root_item, trans->transid);
+
+ WARN_ON(root->log_root);
+ root->log_root = log_root;
+ root->log_transid = 0;
return 0;
}
struct btrfs_path *path;
struct extent_buffer *l;
u64 highest_inode;
+ u64 generation;
u32 blocksize;
int ret = 0;
kfree(root);
return ERR_PTR(ret);
}
+ generation = btrfs_root_generation(&root->root_item);
blocksize = btrfs_level_size(root, btrfs_root_level(&root->root_item));
root->node = read_tree_block(root, btrfs_root_bytenr(&root->root_item),
- blocksize, 0);
+ blocksize, generation);
BUG_ON(!root->node);
insert:
if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {
return fs_info->chunk_root;
if (location->objectid == BTRFS_DEV_TREE_OBJECTID)
return fs_info->dev_root;
+ if (location->objectid == BTRFS_CSUM_TREE_OBJECTID)
+ return fs_info->csum_root;
root = radix_tree_lookup(&fs_info->fs_roots_radix,
(unsigned long)location->objectid);
root = btrfs_read_fs_root_no_radix(fs_info->tree_root, location);
if (IS_ERR(root))
return root;
+
+ set_anon_super(&root->anon_super, NULL);
+
ret = radix_tree_insert(&fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid,
root);
kfree(root);
return ERR_PTR(ret);
}
- ret = btrfs_find_dead_roots(fs_info->tree_root,
- root->root_key.objectid, root);
- BUG_ON(ret);
-
+ if (!(fs_info->sb->s_flags & MS_RDONLY)) {
+ ret = btrfs_find_dead_roots(fs_info->tree_root,
+ root->root_key.objectid, root);
+ BUG_ON(ret);
+ btrfs_orphan_cleanup(root);
+ }
return root;
}
kfree(root);
return ERR_PTR(ret);
}
-
+#if 0
ret = btrfs_sysfs_add_root(root);
if (ret) {
free_extent_buffer(root->node);
kfree(root);
return ERR_PTR(ret);
}
+#endif
root->in_sysfs = 1;
return root;
}
-#if 0
-static int add_hasher(struct btrfs_fs_info *info, char *type) {
- struct btrfs_hasher *hasher;
-
- hasher = kmalloc(sizeof(*hasher), GFP_NOFS);
- if (!hasher)
- return -ENOMEM;
- hasher->hash_tfm = crypto_alloc_hash(type, 0, CRYPTO_ALG_ASYNC);
- if (!hasher->hash_tfm) {
- kfree(hasher);
- return -EINVAL;
- }
- spin_lock(&info->hash_lock);
- list_add(&hasher->list, &info->hashers);
- spin_unlock(&info->hash_lock);
- return 0;
-}
-#endif
static int btrfs_congested_fn(void *congested_data, int bdi_bits)
{
struct btrfs_fs_info *info = (struct btrfs_fs_info *)congested_data;
int ret = 0;
- struct list_head *cur;
struct btrfs_device *device;
struct backing_dev_info *bdi;
-
+#if 0
if ((bdi_bits & (1 << BDI_write_congested)) &&
btrfs_congested_async(info, 0))
return 1;
-
- list_for_each(cur, &info->fs_devices->devices) {
- device = list_entry(cur, struct btrfs_device, dev_list);
+#endif
+ list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
if (!device->bdev)
continue;
bdi = blk_get_backing_dev_info(device->bdev);
*/
static void __unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
{
- struct list_head *cur;
struct btrfs_device *device;
struct btrfs_fs_info *info;
info = (struct btrfs_fs_info *)bdi->unplug_io_data;
- list_for_each(cur, &info->fs_devices->devices) {
- device = list_entry(cur, struct btrfs_device, dev_list);
+ list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
+ if (!device->bdev)
+ continue;
+
bdi = blk_get_backing_dev_info(device->bdev);
- if (bdi->unplug_io_fn) {
+ if (bdi->unplug_io_fn)
bdi->unplug_io_fn(bdi, page);
- }
}
}
-void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
+static void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
{
struct inode *inode;
struct extent_map_tree *em_tree;
u64 offset;
/* the generic O_DIRECT read code does this */
- if (!page) {
+ if (1 || !page) {
__unplug_io_fn(bdi, page);
return;
}
return;
inode = mapping->host;
+
+ /*
+ * don't do the expensive searching for a small number of
+ * devices
+ */
+ if (BTRFS_I(inode)->root->fs_info->fs_devices->open_devices <= 2) {
+ __unplug_io_fn(bdi, page);
+ return;
+ }
+
offset = page_offset(page);
em_tree = &BTRFS_I(inode)->extent_tree;
static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi)
{
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)
bdi_init(bdi);
-#endif
bdi->ra_pages = default_backing_dev_info.ra_pages;
bdi->state = 0;
bdi->capabilities = default_backing_dev_info.capabilities;
bio = end_io_wq->bio;
fs_info = end_io_wq->info;
- /* metadata bios are special because the whole tree block must
+ /* metadata bio reads are special because the whole tree block must
* be checksummed at once. This makes sure the entire block is in
* ram and up to date before trying to verify things. For
* blocksize <= pagesize, it is basically a noop
*/
- if (end_io_wq->metadata && !bio_ready_for_csum(bio)) {
- btrfs_queue_worker(&fs_info->endio_workers,
+ if (!(bio->bi_rw & (1 << BIO_RW)) && end_io_wq->metadata &&
+ !bio_ready_for_csum(bio)) {
+ btrfs_queue_worker(&fs_info->endio_meta_workers,
&end_io_wq->work);
return;
}
bio->bi_private = end_io_wq->private;
bio->bi_end_io = end_io_wq->end_io;
kfree(end_io_wq);
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,23)
- bio_endio(bio, bio->bi_size, error);
-#else
bio_endio(bio, error);
-#endif
}
static int cleaner_kthread(void *arg)
mutex_lock(&root->fs_info->transaction_kthread_mutex);
if (root->fs_info->total_ref_cache_size > 20 * 1024 * 1024) {
- printk("btrfs: total reference cache size %Lu\n",
- root->fs_info->total_ref_cache_size);
+ printk(KERN_INFO "btrfs: total reference cache "
+ "size %llu\n",
+ root->fs_info->total_ref_cache_size);
}
mutex_lock(&root->fs_info->trans_mutex);
u32 leafsize;
u32 blocksize;
u32 stripesize;
+ u64 generation;
+ u64 features;
+ struct btrfs_key location;
struct buffer_head *bh;
struct btrfs_root *extent_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
+ struct btrfs_root *csum_root = kzalloc(sizeof(struct btrfs_root),
+ GFP_NOFS);
struct btrfs_root *tree_root = kzalloc(sizeof(struct btrfs_root),
GFP_NOFS);
struct btrfs_fs_info *fs_info = kzalloc(sizeof(*fs_info),
struct btrfs_super_block *disk_super;
- if (!extent_root || !tree_root || !fs_info) {
+ if (!extent_root || !tree_root || !fs_info ||
+ !chunk_root || !dev_root || !csum_root) {
err = -ENOMEM;
goto fail;
}
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->hashers);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
- spin_lock_init(&fs_info->hash_lock);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->new_trans_lock);
spin_lock_init(&fs_info->ref_cache_lock);
init_completion(&fs_info->kobj_unregister);
fs_info->tree_root = tree_root;
fs_info->extent_root = extent_root;
+ fs_info->csum_root = csum_root;
fs_info->chunk_root = chunk_root;
fs_info->dev_root = dev_root;
fs_info->fs_devices = fs_devices;
INIT_LIST_HEAD(&fs_info->space_info);
btrfs_mapping_init(&fs_info->mapping_tree);
atomic_set(&fs_info->nr_async_submits, 0);
+ atomic_set(&fs_info->async_delalloc_pages, 0);
+ atomic_set(&fs_info->async_submit_draining, 0);
atomic_set(&fs_info->nr_async_bios, 0);
atomic_set(&fs_info->throttles, 0);
atomic_set(&fs_info->throttle_gen, 0);
fs_info->btree_inode = new_inode(sb);
fs_info->btree_inode->i_ino = 1;
fs_info->btree_inode->i_nlink = 1;
- fs_info->thread_pool_size = min(num_online_cpus() + 2, 8);
+
+ fs_info->thread_pool_size = min_t(unsigned long,
+ num_online_cpus() + 2, 8);
INIT_LIST_HEAD(&fs_info->ordered_extents);
spin_lock_init(&fs_info->ordered_extent_lock);
BTRFS_I(fs_info->btree_inode)->io_tree.ops = &btree_extent_io_ops;
- extent_io_tree_init(&fs_info->free_space_cache,
- fs_info->btree_inode->i_mapping, GFP_NOFS);
- extent_io_tree_init(&fs_info->block_group_cache,
- fs_info->btree_inode->i_mapping, GFP_NOFS);
+ spin_lock_init(&fs_info->block_group_cache_lock);
+ fs_info->block_group_cache_tree.rb_node = NULL;
+
extent_io_tree_init(&fs_info->pinned_extents,
fs_info->btree_inode->i_mapping, GFP_NOFS);
extent_io_tree_init(&fs_info->pending_del,
fs_info->btree_inode->i_mapping, GFP_NOFS);
fs_info->do_barriers = 1;
+ INIT_LIST_HEAD(&fs_info->dead_reloc_roots);
+ btrfs_leaf_ref_tree_init(&fs_info->reloc_ref_tree);
+ btrfs_leaf_ref_tree_init(&fs_info->shared_ref_tree);
+
BTRFS_I(fs_info->btree_inode)->root = tree_root;
memset(&BTRFS_I(fs_info->btree_inode)->location, 0,
sizeof(struct btrfs_key));
mutex_init(&fs_info->trans_mutex);
mutex_init(&fs_info->tree_log_mutex);
mutex_init(&fs_info->drop_mutex);
- mutex_init(&fs_info->alloc_mutex);
+ mutex_init(&fs_info->extent_ins_mutex);
+ mutex_init(&fs_info->pinned_mutex);
mutex_init(&fs_info->chunk_mutex);
mutex_init(&fs_info->transaction_kthread_mutex);
mutex_init(&fs_info->cleaner_mutex);
mutex_init(&fs_info->volume_mutex);
+ mutex_init(&fs_info->tree_reloc_mutex);
init_waitqueue_head(&fs_info->transaction_throttle);
init_waitqueue_head(&fs_info->transaction_wait);
init_waitqueue_head(&fs_info->async_submit_wait);
- init_waitqueue_head(&fs_info->tree_log_wait);
- atomic_set(&fs_info->tree_log_commit, 0);
- atomic_set(&fs_info->tree_log_writers, 0);
- fs_info->tree_log_transid = 0;
-#if 0
- ret = add_hasher(fs_info, "crc32c");
- if (ret) {
- printk("btrfs: failed hash setup, modprobe cryptomgr?\n");
- err = -ENOMEM;
- goto fail_iput;
- }
-#endif
__setup_root(4096, 4096, 4096, 4096, tree_root,
fs_info, BTRFS_ROOT_TREE_OBJECTID);
- bh = __bread(fs_devices->latest_bdev,
- BTRFS_SUPER_INFO_OFFSET / 4096, 4096);
+ bh = btrfs_read_dev_super(fs_devices->latest_bdev);
if (!bh)
goto fail_iput;
memcpy(&fs_info->super_copy, bh->b_data, sizeof(fs_info->super_copy));
+ memcpy(&fs_info->super_for_commit, &fs_info->super_copy,
+ sizeof(fs_info->super_for_commit));
brelse(bh);
memcpy(fs_info->fsid, fs_info->super_copy.fsid, BTRFS_FSID_SIZE);
disk_super = &fs_info->super_copy;
if (!btrfs_super_root(disk_super))
- goto fail_sb_buffer;
+ goto fail_iput;
- err = btrfs_parse_options(tree_root, options);
- if (err)
- goto fail_sb_buffer;
+ ret = btrfs_parse_options(tree_root, options);
+ if (ret) {
+ err = ret;
+ goto fail_iput;
+ }
+
+ features = btrfs_super_incompat_flags(disk_super) &
+ ~BTRFS_FEATURE_INCOMPAT_SUPP;
+ if (features) {
+ printk(KERN_ERR "BTRFS: couldn't mount because of "
+ "unsupported optional features (%Lx).\n",
+ features);
+ err = -EINVAL;
+ goto fail_iput;
+ }
+
+ features = btrfs_super_compat_ro_flags(disk_super) &
+ ~BTRFS_FEATURE_COMPAT_RO_SUPP;
+ if (!(sb->s_flags & MS_RDONLY) && features) {
+ printk(KERN_ERR "BTRFS: couldn't mount RDWR because of "
+ "unsupported option features (%Lx).\n",
+ features);
+ err = -EINVAL;
+ goto fail_iput;
+ }
/*
* we need to start all the end_io workers up front because the
*/
btrfs_init_workers(&fs_info->workers, "worker",
fs_info->thread_pool_size);
+
+ btrfs_init_workers(&fs_info->delalloc_workers, "delalloc",
+ fs_info->thread_pool_size);
+
btrfs_init_workers(&fs_info->submit_workers, "submit",
min_t(u64, fs_devices->num_devices,
fs_info->thread_pool_size));
*/
fs_info->submit_workers.idle_thresh = 64;
- /* fs_info->workers is responsible for checksumming file data
- * blocks and metadata. Using a larger idle thresh allows each
- * worker thread to operate on things in roughly the order they
- * were sent by the writeback daemons, improving overall locality
- * of the IO going down the pipe.
- */
- fs_info->workers.idle_thresh = 128;
+ fs_info->workers.idle_thresh = 16;
+ fs_info->workers.ordered = 1;
+
+ fs_info->delalloc_workers.idle_thresh = 2;
+ fs_info->delalloc_workers.ordered = 1;
btrfs_init_workers(&fs_info->fixup_workers, "fixup", 1);
btrfs_init_workers(&fs_info->endio_workers, "endio",
fs_info->thread_pool_size);
+ btrfs_init_workers(&fs_info->endio_meta_workers, "endio-meta",
+ fs_info->thread_pool_size);
+ btrfs_init_workers(&fs_info->endio_meta_write_workers,
+ "endio-meta-write", fs_info->thread_pool_size);
btrfs_init_workers(&fs_info->endio_write_workers, "endio-write",
fs_info->thread_pool_size);
* low idle thresh
*/
fs_info->endio_workers.idle_thresh = 4;
+ fs_info->endio_meta_workers.idle_thresh = 4;
+
fs_info->endio_write_workers.idle_thresh = 64;
+ fs_info->endio_meta_write_workers.idle_thresh = 64;
btrfs_start_workers(&fs_info->workers, 1);
btrfs_start_workers(&fs_info->submit_workers, 1);
+ btrfs_start_workers(&fs_info->delalloc_workers, 1);
btrfs_start_workers(&fs_info->fixup_workers, 1);
btrfs_start_workers(&fs_info->endio_workers, fs_info->thread_pool_size);
+ btrfs_start_workers(&fs_info->endio_meta_workers,
+ fs_info->thread_pool_size);
+ btrfs_start_workers(&fs_info->endio_meta_write_workers,
+ fs_info->thread_pool_size);
btrfs_start_workers(&fs_info->endio_write_workers,
fs_info->thread_pool_size);
- err = -EINVAL;
- if (btrfs_super_num_devices(disk_super) > fs_devices->open_devices) {
- printk("Btrfs: wanted %llu devices, but found %llu\n",
- (unsigned long long)btrfs_super_num_devices(disk_super),
- (unsigned long long)fs_devices->open_devices);
- if (btrfs_test_opt(tree_root, DEGRADED))
- printk("continuing in degraded mode\n");
- else {
- goto fail_sb_buffer;
- }
- }
-
fs_info->bdi.ra_pages *= btrfs_super_num_devices(disk_super);
+ fs_info->bdi.ra_pages = max(fs_info->bdi.ra_pages,
+ 4 * 1024 * 1024 / PAGE_CACHE_SIZE);
nodesize = btrfs_super_nodesize(disk_super);
leafsize = btrfs_super_leafsize(disk_super);
if (strncmp((char *)(&disk_super->magic), BTRFS_MAGIC,
sizeof(disk_super->magic))) {
- printk("btrfs: valid FS not found on %s\n", sb->s_id);
+ printk(KERN_INFO "btrfs: valid FS not found on %s\n", sb->s_id);
goto fail_sb_buffer;
}
ret = btrfs_read_sys_array(tree_root);
mutex_unlock(&fs_info->chunk_mutex);
if (ret) {
- printk("btrfs: failed to read the system array on %s\n",
- sb->s_id);
+ printk(KERN_WARNING "btrfs: failed to read the system "
+ "array on %s\n", sb->s_id);
goto fail_sys_array;
}
blocksize = btrfs_level_size(tree_root,
btrfs_super_chunk_root_level(disk_super));
+ generation = btrfs_super_chunk_root_generation(disk_super);
__setup_root(nodesize, leafsize, sectorsize, stripesize,
chunk_root, fs_info, BTRFS_CHUNK_TREE_OBJECTID);
chunk_root->node = read_tree_block(chunk_root,
btrfs_super_chunk_root(disk_super),
- blocksize, 0);
+ blocksize, generation);
BUG_ON(!chunk_root->node);
read_extent_buffer(chunk_root->node, fs_info->chunk_tree_uuid,
- (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
- BTRFS_UUID_SIZE);
+ (unsigned long)btrfs_header_chunk_tree_uuid(chunk_root->node),
+ BTRFS_UUID_SIZE);
mutex_lock(&fs_info->chunk_mutex);
ret = btrfs_read_chunk_tree(chunk_root);
mutex_unlock(&fs_info->chunk_mutex);
- BUG_ON(ret);
+ if (ret) {
+ printk(KERN_WARNING "btrfs: failed to read chunk tree on %s\n",
+ sb->s_id);
+ goto fail_chunk_root;
+ }
btrfs_close_extra_devices(fs_devices);
blocksize = btrfs_level_size(tree_root,
btrfs_super_root_level(disk_super));
-
+ generation = btrfs_super_generation(disk_super);
tree_root->node = read_tree_block(tree_root,
btrfs_super_root(disk_super),
- blocksize, 0);
+ blocksize, generation);
if (!tree_root->node)
- goto fail_sb_buffer;
+ goto fail_chunk_root;
ret = find_and_setup_root(tree_root, fs_info,
ret = find_and_setup_root(tree_root, fs_info,
BTRFS_DEV_TREE_OBJECTID, dev_root);
dev_root->track_dirty = 1;
+ if (ret)
+ goto fail_extent_root;
+ ret = find_and_setup_root(tree_root, fs_info,
+ BTRFS_CSUM_TREE_OBJECTID, csum_root);
if (ret)
goto fail_extent_root;
+ csum_root->track_dirty = 1;
+
btrfs_read_block_groups(extent_root);
- fs_info->generation = btrfs_super_generation(disk_super) + 1;
+ fs_info->generation = generation;
+ fs_info->last_trans_committed = generation;
fs_info->data_alloc_profile = (u64)-1;
fs_info->metadata_alloc_profile = (u64)-1;
fs_info->system_alloc_profile = fs_info->metadata_alloc_profile;
fs_info->cleaner_kthread = kthread_run(cleaner_kthread, tree_root,
"btrfs-cleaner");
- if (!fs_info->cleaner_kthread)
- goto fail_extent_root;
+ if (IS_ERR(fs_info->cleaner_kthread))
+ goto fail_csum_root;
fs_info->transaction_kthread = kthread_run(transaction_kthread,
tree_root,
"btrfs-transaction");
- if (!fs_info->transaction_kthread)
+ if (IS_ERR(fs_info->transaction_kthread))
goto fail_cleaner;
if (btrfs_super_log_root(disk_super) != 0) {
- u32 blocksize;
u64 bytenr = btrfs_super_log_root(disk_super);
+ if (fs_devices->rw_devices == 0) {
+ printk(KERN_WARNING "Btrfs log replay required "
+ "on RO media\n");
+ err = -EIO;
+ goto fail_trans_kthread;
+ }
blocksize =
btrfs_level_size(tree_root,
btrfs_super_log_root_level(disk_super));
log_tree_root, fs_info, BTRFS_TREE_LOG_OBJECTID);
log_tree_root->node = read_tree_block(tree_root, bytenr,
- blocksize, 0);
+ blocksize,
+ generation + 1);
ret = btrfs_recover_log_trees(log_tree_root);
BUG_ON(ret);
+
+ if (sb->s_flags & MS_RDONLY) {
+ ret = btrfs_commit_super(tree_root);
+ BUG_ON(ret);
+ }
+ }
+
+ if (!(sb->s_flags & MS_RDONLY)) {
+ ret = btrfs_cleanup_reloc_trees(tree_root);
+ BUG_ON(ret);
}
- fs_info->last_trans_committed = btrfs_super_generation(disk_super);
+
+ location.objectid = BTRFS_FS_TREE_OBJECTID;
+ location.type = BTRFS_ROOT_ITEM_KEY;
+ location.offset = (u64)-1;
+
+ fs_info->fs_root = btrfs_read_fs_root_no_name(fs_info, &location);
+ if (!fs_info->fs_root)
+ goto fail_trans_kthread;
return tree_root;
+fail_trans_kthread:
+ kthread_stop(fs_info->transaction_kthread);
fail_cleaner:
kthread_stop(fs_info->cleaner_kthread);
+
+ /*
+ * make sure we're done with the btree inode before we stop our
+ * kthreads
+ */
+ filemap_write_and_wait(fs_info->btree_inode->i_mapping);
+ invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
+
+fail_csum_root:
+ free_extent_buffer(csum_root->node);
fail_extent_root:
free_extent_buffer(extent_root->node);
fail_tree_root:
free_extent_buffer(tree_root->node);
+fail_chunk_root:
+ free_extent_buffer(chunk_root->node);
fail_sys_array:
+ free_extent_buffer(dev_root->node);
fail_sb_buffer:
btrfs_stop_workers(&fs_info->fixup_workers);
+ btrfs_stop_workers(&fs_info->delalloc_workers);
btrfs_stop_workers(&fs_info->workers);
btrfs_stop_workers(&fs_info->endio_workers);
+ btrfs_stop_workers(&fs_info->endio_meta_workers);
+ btrfs_stop_workers(&fs_info->endio_meta_write_workers);
btrfs_stop_workers(&fs_info->endio_write_workers);
btrfs_stop_workers(&fs_info->submit_workers);
fail_iput:
+ invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
iput(fs_info->btree_inode);
-fail:
+
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
+ bdi_destroy(&fs_info->bdi);
+fail:
kfree(extent_root);
kfree(tree_root);
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)
- bdi_destroy(&fs_info->bdi);
-#endif
kfree(fs_info);
+ kfree(chunk_root);
+ kfree(dev_root);
+ kfree(csum_root);
return ERR_PTR(err);
}
put_bh(bh);
}
-int write_all_supers(struct btrfs_root *root)
+struct buffer_head *btrfs_read_dev_super(struct block_device *bdev)
+{
+ struct buffer_head *bh;
+ struct buffer_head *latest = NULL;
+ struct btrfs_super_block *super;
+ int i;
+ u64 transid = 0;
+ u64 bytenr;
+
+ /* we would like to check all the supers, but that would make
+ * a btrfs mount succeed after a mkfs from a different FS.
+ * So, we need to add a special mount option to scan for
+ * later supers, using BTRFS_SUPER_MIRROR_MAX instead
+ */
+ for (i = 0; i < 1; i++) {
+ bytenr = btrfs_sb_offset(i);
+ if (bytenr + 4096 >= i_size_read(bdev->bd_inode))
+ break;
+ bh = __bread(bdev, bytenr / 4096, 4096);
+ if (!bh)
+ continue;
+
+ super = (struct btrfs_super_block *)bh->b_data;
+ if (btrfs_super_bytenr(super) != bytenr ||
+ strncmp((char *)(&super->magic), BTRFS_MAGIC,
+ sizeof(super->magic))) {
+ brelse(bh);
+ continue;
+ }
+
+ if (!latest || btrfs_super_generation(super) > transid) {
+ brelse(latest);
+ latest = bh;
+ transid = btrfs_super_generation(super);
+ } else {
+ brelse(bh);
+ }
+ }
+ return latest;
+}
+
+static int write_dev_supers(struct btrfs_device *device,
+ struct btrfs_super_block *sb,
+ int do_barriers, int wait, int max_mirrors)
+{
+ struct buffer_head *bh;
+ int i;
+ int ret;
+ int errors = 0;
+ u32 crc;
+ u64 bytenr;
+ int last_barrier = 0;
+
+ if (max_mirrors == 0)
+ max_mirrors = BTRFS_SUPER_MIRROR_MAX;
+
+ /* make sure only the last submit_bh does a barrier */
+ if (do_barriers) {
+ for (i = 0; i < max_mirrors; i++) {
+ bytenr = btrfs_sb_offset(i);
+ if (bytenr + BTRFS_SUPER_INFO_SIZE >=
+ device->total_bytes)
+ break;
+ last_barrier = i;
+ }
+ }
+
+ for (i = 0; i < max_mirrors; i++) {
+ bytenr = btrfs_sb_offset(i);
+ if (bytenr + BTRFS_SUPER_INFO_SIZE >= device->total_bytes)
+ break;
+
+ if (wait) {
+ bh = __find_get_block(device->bdev, bytenr / 4096,
+ BTRFS_SUPER_INFO_SIZE);
+ BUG_ON(!bh);
+ brelse(bh);
+ wait_on_buffer(bh);
+ if (buffer_uptodate(bh)) {
+ brelse(bh);
+ continue;
+ }
+ } else {
+ btrfs_set_super_bytenr(sb, bytenr);
+
+ crc = ~(u32)0;
+ crc = btrfs_csum_data(NULL, (char *)sb +
+ BTRFS_CSUM_SIZE, crc,
+ BTRFS_SUPER_INFO_SIZE -
+ BTRFS_CSUM_SIZE);
+ btrfs_csum_final(crc, sb->csum);
+
+ bh = __getblk(device->bdev, bytenr / 4096,
+ BTRFS_SUPER_INFO_SIZE);
+ memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE);
+
+ set_buffer_uptodate(bh);
+ get_bh(bh);
+ lock_buffer(bh);
+ bh->b_end_io = btrfs_end_buffer_write_sync;
+ }
+
+ if (i == last_barrier && do_barriers && device->barriers) {
+ ret = submit_bh(WRITE_BARRIER, bh);
+ if (ret == -EOPNOTSUPP) {
+ printk("btrfs: disabling barriers on dev %s\n",
+ device->name);
+ set_buffer_uptodate(bh);
+ device->barriers = 0;
+ get_bh(bh);
+ lock_buffer(bh);
+ ret = submit_bh(WRITE, bh);
+ }
+ } else {
+ ret = submit_bh(WRITE, bh);
+ }
+
+ if (!ret && wait) {
+ wait_on_buffer(bh);
+ if (!buffer_uptodate(bh))
+ errors++;
+ } else if (ret) {
+ errors++;
+ }
+ if (wait)
+ brelse(bh);
+ }
+ return errors < i ? 0 : -1;
+}
+
+int write_all_supers(struct btrfs_root *root, int max_mirrors)
{
- struct list_head *cur;
struct list_head *head = &root->fs_info->fs_devices->devices;
struct btrfs_device *dev;
struct btrfs_super_block *sb;
struct btrfs_dev_item *dev_item;
- struct buffer_head *bh;
int ret;
int do_barriers;
int max_errors;
int total_errors = 0;
- u32 crc;
u64 flags;
max_errors = btrfs_super_num_devices(&root->fs_info->super_copy) - 1;
sb = &root->fs_info->super_for_commit;
dev_item = &sb->dev_item;
- list_for_each(cur, head) {
- dev = list_entry(cur, struct btrfs_device, dev_list);
+ list_for_each_entry(dev, head, dev_list) {
if (!dev->bdev) {
total_errors++;
continue;
}
- if (!dev->in_fs_metadata)
+ if (!dev->in_fs_metadata || !dev->writeable)
continue;
+ btrfs_set_stack_device_generation(dev_item, 0);
btrfs_set_stack_device_type(dev_item, dev->type);
btrfs_set_stack_device_id(dev_item, dev->devid);
btrfs_set_stack_device_total_bytes(dev_item, dev->total_bytes);
btrfs_set_stack_device_io_width(dev_item, dev->io_width);
btrfs_set_stack_device_sector_size(dev_item, dev->sector_size);
memcpy(dev_item->uuid, dev->uuid, BTRFS_UUID_SIZE);
+ memcpy(dev_item->fsid, dev->fs_devices->fsid, BTRFS_UUID_SIZE);
+
flags = btrfs_super_flags(sb);
btrfs_set_super_flags(sb, flags | BTRFS_HEADER_FLAG_WRITTEN);
-
- crc = ~(u32)0;
- crc = btrfs_csum_data(root, (char *)sb + BTRFS_CSUM_SIZE, crc,
- BTRFS_SUPER_INFO_SIZE - BTRFS_CSUM_SIZE);
- btrfs_csum_final(crc, sb->csum);
-
- bh = __getblk(dev->bdev, BTRFS_SUPER_INFO_OFFSET / 4096,
- BTRFS_SUPER_INFO_SIZE);
-
- memcpy(bh->b_data, sb, BTRFS_SUPER_INFO_SIZE);
- dev->pending_io = bh;
-
- get_bh(bh);
- set_buffer_uptodate(bh);
- lock_buffer(bh);
- bh->b_end_io = btrfs_end_buffer_write_sync;
-
- if (do_barriers && dev->barriers) {
- ret = submit_bh(WRITE_BARRIER, bh);
- if (ret == -EOPNOTSUPP) {
- printk("btrfs: disabling barriers on dev %s\n",
- dev->name);
- set_buffer_uptodate(bh);
- dev->barriers = 0;
- get_bh(bh);
- lock_buffer(bh);
- ret = submit_bh(WRITE, bh);
- }
- } else {
- ret = submit_bh(WRITE, bh);
- }
+ ret = write_dev_supers(dev, sb, do_barriers, 0, max_mirrors);
if (ret)
total_errors++;
}
if (total_errors > max_errors) {
- printk("btrfs: %d errors while writing supers\n", total_errors);
+ printk(KERN_ERR "btrfs: %d errors while writing supers\n",
+ total_errors);
BUG();
}
- total_errors = 0;
- list_for_each(cur, head) {
- dev = list_entry(cur, struct btrfs_device, dev_list);
+ total_errors = 0;
+ list_for_each_entry(dev, head, dev_list) {
if (!dev->bdev)
continue;
- if (!dev->in_fs_metadata)
+ if (!dev->in_fs_metadata || !dev->writeable)
continue;
- BUG_ON(!dev->pending_io);
- bh = dev->pending_io;
- wait_on_buffer(bh);
- if (!buffer_uptodate(dev->pending_io)) {
- if (do_barriers && dev->barriers) {
- printk("btrfs: disabling barriers on dev %s\n",
- dev->name);
- set_buffer_uptodate(bh);
- get_bh(bh);
- lock_buffer(bh);
- dev->barriers = 0;
- ret = submit_bh(WRITE, bh);
- BUG_ON(ret);
- wait_on_buffer(bh);
- if (!buffer_uptodate(bh))
- total_errors++;
- } else {
- total_errors++;
- }
-
- }
- dev->pending_io = NULL;
- brelse(bh);
+ ret = write_dev_supers(dev, sb, do_barriers, 1, max_mirrors);
+ if (ret)
+ total_errors++;
}
if (total_errors > max_errors) {
- printk("btrfs: %d errors while writing supers\n", total_errors);
+ printk(KERN_ERR "btrfs: %d errors while writing supers\n",
+ total_errors);
BUG();
}
return 0;
}
-int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root
- *root)
+int write_ctree_super(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, int max_mirrors)
{
int ret;
- ret = write_all_supers(root);
+ ret = write_all_supers(root, max_mirrors);
return ret;
}
{
radix_tree_delete(&fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid);
- if (root->in_sysfs)
- btrfs_sysfs_del_root(root);
- if (root->inode)
- iput(root->inode);
+ if (root->anon_super.s_dev) {
+ down_write(&root->anon_super.s_umount);
+ kill_anon_super(&root->anon_super);
+ }
if (root->node)
free_extent_buffer(root->node);
if (root->commit_root)
free_extent_buffer(root->commit_root);
- if (root->name)
- kfree(root->name);
+ kfree(root->name);
kfree(root);
return 0;
}
struct btrfs_root *gang[8];
int i;
- while(1) {
+ while (1) {
ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix,
(void **)gang, 0,
ARRAY_SIZE(gang));
return 0;
}
-int close_ctree(struct btrfs_root *root)
+int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info)
{
+ u64 root_objectid = 0;
+ struct btrfs_root *gang[8];
+ int i;
int ret;
- struct btrfs_trans_handle *trans;
- struct btrfs_fs_info *fs_info = root->fs_info;
- fs_info->closing = 1;
- smp_mb();
+ while (1) {
+ ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix,
+ (void **)gang, root_objectid,
+ ARRAY_SIZE(gang));
+ if (!ret)
+ break;
+ for (i = 0; i < ret; i++) {
+ root_objectid = gang[i]->root_key.objectid;
+ ret = btrfs_find_dead_roots(fs_info->tree_root,
+ root_objectid, gang[i]);
+ BUG_ON(ret);
+ btrfs_orphan_cleanup(gang[i]);
+ }
+ root_objectid++;
+ }
+ return 0;
+}
- kthread_stop(root->fs_info->transaction_kthread);
- kthread_stop(root->fs_info->cleaner_kthread);
+int btrfs_commit_super(struct btrfs_root *root)
+{
+ struct btrfs_trans_handle *trans;
+ int ret;
+ mutex_lock(&root->fs_info->cleaner_mutex);
btrfs_clean_old_snapshots(root);
+ mutex_unlock(&root->fs_info->cleaner_mutex);
trans = btrfs_start_transaction(root, 1);
ret = btrfs_commit_transaction(trans, root);
- /* run commit again to drop the original snapshot */
+ BUG_ON(ret);
+ /* run commit again to drop the original snapshot */
trans = btrfs_start_transaction(root, 1);
btrfs_commit_transaction(trans, root);
ret = btrfs_write_and_wait_transaction(NULL, root);
BUG_ON(ret);
- write_ctree_super(NULL, root);
+ ret = write_ctree_super(NULL, root, 0);
+ return ret;
+}
+
+int close_ctree(struct btrfs_root *root)
+{
+ struct btrfs_fs_info *fs_info = root->fs_info;
+ int ret;
+
+ fs_info->closing = 1;
+ smp_mb();
+
+ kthread_stop(root->fs_info->transaction_kthread);
+ kthread_stop(root->fs_info->cleaner_kthread);
+
+ if (!(fs_info->sb->s_flags & MS_RDONLY)) {
+ ret = btrfs_commit_super(root);
+ if (ret)
+ printk(KERN_ERR "btrfs: commit super ret %d\n", ret);
+ }
if (fs_info->delalloc_bytes) {
- printk("btrfs: at unmount delalloc count %Lu\n",
+ printk(KERN_INFO "btrfs: at unmount delalloc count %llu\n",
fs_info->delalloc_bytes);
}
if (fs_info->total_ref_cache_size) {
- printk("btrfs: at umount reference cache size %Lu\n",
- fs_info->total_ref_cache_size);
+ printk(KERN_INFO "btrfs: at umount reference cache size %llu\n",
+ (unsigned long long)fs_info->total_ref_cache_size);
}
if (fs_info->extent_root->node)
if (fs_info->tree_root->node)
free_extent_buffer(fs_info->tree_root->node);
- if (root->fs_info->chunk_root->node);
+ if (root->fs_info->chunk_root->node)
free_extent_buffer(root->fs_info->chunk_root->node);
- if (root->fs_info->dev_root->node);
+ if (root->fs_info->dev_root->node)
free_extent_buffer(root->fs_info->dev_root->node);
+ if (root->fs_info->csum_root->node)
+ free_extent_buffer(root->fs_info->csum_root->node);
+
btrfs_free_block_groups(root->fs_info);
- fs_info->closing = 2;
- del_fs_roots(fs_info);
- filemap_write_and_wait(fs_info->btree_inode->i_mapping);
+ del_fs_roots(fs_info);
- truncate_inode_pages(fs_info->btree_inode->i_mapping, 0);
+ iput(fs_info->btree_inode);
btrfs_stop_workers(&fs_info->fixup_workers);
+ btrfs_stop_workers(&fs_info->delalloc_workers);
btrfs_stop_workers(&fs_info->workers);
btrfs_stop_workers(&fs_info->endio_workers);
+ btrfs_stop_workers(&fs_info->endio_meta_workers);
+ btrfs_stop_workers(&fs_info->endio_meta_write_workers);
btrfs_stop_workers(&fs_info->endio_write_workers);
btrfs_stop_workers(&fs_info->submit_workers);
- iput(fs_info->btree_inode);
#if 0
- while(!list_empty(&fs_info->hashers)) {
+ while (!list_empty(&fs_info->hashers)) {
struct btrfs_hasher *hasher;
hasher = list_entry(fs_info->hashers.next, struct btrfs_hasher,
hashers);
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,23)
bdi_destroy(&fs_info->bdi);
-#endif
kfree(fs_info->extent_root);
kfree(fs_info->tree_root);
kfree(fs_info->chunk_root);
kfree(fs_info->dev_root);
+ kfree(fs_info->csum_root);
return 0;
}
u64 transid = btrfs_header_generation(buf);
struct inode *btree_inode = root->fs_info->btree_inode;
- WARN_ON(!btrfs_tree_locked(buf));
+ btrfs_set_lock_blocking(buf);
+
+ btrfs_assert_tree_locked(buf);
if (transid != root->fs_info->generation) {
- printk(KERN_CRIT "transid mismatch buffer %llu, found %Lu running %Lu\n",
+ printk(KERN_CRIT "btrfs transid mismatch buffer %llu, "
+ "found %llu running %llu\n",
(unsigned long long)buf->start,
- transid, root->fs_info->generation);
+ (unsigned long long)transid,
+ (unsigned long long)root->fs_info->generation);
WARN_ON(1);
}
set_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree, buf);
struct extent_io_tree *tree;
u64 num_dirty;
u64 start = 0;
- unsigned long thresh = 96 * 1024 * 1024;
+ unsigned long thresh = 32 * 1024 * 1024;
tree = &BTRFS_I(root->fs_info->btree_inode)->io_tree;
if (current_is_pdflush() || current->flags & PF_MEMALLOC)
struct btrfs_root *root = BTRFS_I(buf->first_page->mapping->host)->root;
int ret;
ret = btree_read_extent_buffer_pages(root, buf, 0, parent_transid);
- if (ret == 0) {
- buf->flags |= EXTENT_UPTODATE;
- }
+ if (ret == 0)
+ set_bit(EXTENT_BUFFER_UPTODATE, &buf->bflags);
return ret;
}
int btree_lock_page_hook(struct page *page)
{
struct inode *inode = page->mapping->host;
- struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
struct extent_buffer *eb;
unsigned long len;
goto out;
btrfs_tree_lock(eb);
- spin_lock(&root->fs_info->hash_lock);
btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
- spin_unlock(&root->fs_info->hash_lock);
btrfs_tree_unlock(eb);
free_extent_buffer(eb);
out:
static struct extent_io_ops btree_extent_io_ops = {
.write_cache_pages_lock_hook = btree_lock_page_hook,
- .writepage_io_hook = btree_writepage_io_hook,
.readpage_end_io_hook = btree_readpage_end_io_hook,
.submit_bio_hook = btree_submit_bio_hook,
/* note we're sharing with inode.c for the merge bio hook */
git.samba.org / sfrench / cifs-2.6.git / blobdiff