Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
Btrfs: fix data space leak fix
Btrfs: remove duplicates of filemap_ helpers
Btrfs: take i_mutex before generic_write_checks
Btrfs: fix arguments to btrfs_wait_on_page_writeback_range
Btrfs: fix deadlock with free space handling and user transactions
Btrfs: fix error cases for ioctl transactions
Btrfs: Use CONFIG_BTRFS_POSIX_ACL to enable ACL code
Btrfs: introduce missing kfree
Btrfs: Fix setting umask when POSIX ACLs are not enabled
Btrfs: proper -ENOSPC handling
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index f128427..69b355a 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -27,7 +27,7 @@
#include "btrfs_inode.h"
#include "xattr.h"
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_BTRFS_POSIX_ACL
static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
{
@@ -313,7 +313,7 @@
.set = btrfs_xattr_acl_access_set,
};
-#else /* CONFIG_FS_POSIX_ACL */
+#else /* CONFIG_BTRFS_POSIX_ACL */
int btrfs_acl_chmod(struct inode *inode)
{
@@ -325,4 +325,4 @@
return 0;
}
-#endif /* CONFIG_FS_POSIX_ACL */
+#endif /* CONFIG_BTRFS_POSIX_ACL */
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 82ee56b..a54d354 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -128,6 +128,14 @@
u64 last_unlink_trans;
/*
+ * These two counters are for delalloc metadata reservations. We keep
+ * track of how many extents we've accounted for vs how many extents we
+ * have.
+ */
+ int delalloc_reserved_extents;
+ int delalloc_extents;
+
+ /*
* ordered_data_close is set by truncate when a file that used
* to have good data has been truncated to zero. When it is set
* the btrfs file release call will add this inode to the
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 4484eb3..dd8ced9 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -675,18 +675,19 @@
current allocations */
u64 bytes_readonly; /* total bytes that are read only */
u64 bytes_super; /* total bytes reserved for the super blocks */
-
- /* delalloc accounting */
- u64 bytes_delalloc; /* number of bytes reserved for allocation,
- this space is not necessarily reserved yet
- by the allocator */
+ u64 bytes_root; /* the number of bytes needed to commit a
+ transaction */
u64 bytes_may_use; /* number of bytes that may be used for
- delalloc */
+ delalloc/allocations */
+ u64 bytes_delalloc; /* number of bytes currently reserved for
+ delayed allocation */
int full; /* indicates that we cannot allocate any more
chunks for this space */
int force_alloc; /* set if we need to force a chunk alloc for
this space */
+ int force_delalloc; /* make people start doing filemap_flush until
+ we're under a threshold */
struct list_head list;
@@ -695,6 +696,9 @@
spinlock_t lock;
struct rw_semaphore groups_sem;
atomic_t caching_threads;
+
+ int allocating_chunk;
+ wait_queue_head_t wait;
};
/*
@@ -2022,7 +2026,12 @@
void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
-int btrfs_check_metadata_free_space(struct btrfs_root *root);
+int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items);
+int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
+int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
+ struct inode *inode, int num_items);
+int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
+ struct inode *inode, int num_items);
int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
u64 bytes);
void btrfs_free_reserved_data_space(struct btrfs_root *root,
@@ -2357,7 +2366,7 @@
int btrfs_sync_fs(struct super_block *sb, int wait);
/* acl.c */
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_BTRFS_POSIX_ACL
int btrfs_check_acl(struct inode *inode, int mask);
#else
#define btrfs_check_acl NULL
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 644e796..af0435f 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -822,14 +822,14 @@
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_ALL);
+ return filemap_fdatawrite_range(buf->first_page->mapping, buf->start,
+ buf->start + buf->len - 1);
}
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);
+ return filemap_fdatawait_range(buf->first_page->mapping,
+ buf->start, buf->start + buf->len - 1);
}
struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
@@ -1630,7 +1630,7 @@
fs_info->sb = sb;
fs_info->max_extent = (u64)-1;
fs_info->max_inline = 8192 * 1024;
- fs_info->metadata_ratio = 8;
+ fs_info->metadata_ratio = 0;
fs_info->thread_pool_size = min_t(unsigned long,
num_online_cpus() + 2, 8);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 993f93f..359a754 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -68,6 +68,8 @@
struct extent_buffer **must_clean);
static int find_next_key(struct btrfs_path *path, int level,
struct btrfs_key *key);
+static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
+ int dump_block_groups);
static noinline int
block_group_cache_done(struct btrfs_block_group_cache *cache)
@@ -2765,67 +2767,346 @@
alloc_target);
}
+static u64 calculate_bytes_needed(struct btrfs_root *root, int num_items)
+{
+ u64 num_bytes;
+ int level;
+
+ level = BTRFS_MAX_LEVEL - 2;
+ /*
+ * NOTE: these calculations are absolutely the worst possible case.
+ * This assumes that _every_ item we insert will require a new leaf, and
+ * that the tree has grown to its maximum level size.
+ */
+
+ /*
+ * for every item we insert we could insert both an extent item and a
+ * extent ref item. Then for ever item we insert, we will need to cow
+ * both the original leaf, plus the leaf to the left and right of it.
+ *
+ * Unless we are talking about the extent root, then we just want the
+ * number of items * 2, since we just need the extent item plus its ref.
+ */
+ if (root == root->fs_info->extent_root)
+ num_bytes = num_items * 2;
+ else
+ num_bytes = (num_items + (2 * num_items)) * 3;
+
+ /*
+ * num_bytes is total number of leaves we could need times the leaf
+ * size, and then for every leaf we could end up cow'ing 2 nodes per
+ * level, down to the leaf level.
+ */
+ num_bytes = (num_bytes * root->leafsize) +
+ (num_bytes * (level * 2)) * root->nodesize;
+
+ return num_bytes;
+}
+
/*
- * for now this just makes sure we have at least 5% of our metadata space free
- * for use.
+ * Unreserve metadata space for delalloc. If we have less reserved credits than
+ * we have extents, this function does nothing.
*/
-int btrfs_check_metadata_free_space(struct btrfs_root *root)
+int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
+ struct inode *inode, int num_items)
{
struct btrfs_fs_info *info = root->fs_info;
struct btrfs_space_info *meta_sinfo;
- u64 alloc_target, thresh;
- int committed = 0, ret;
+ u64 num_bytes;
+ u64 alloc_target;
+ bool bug = false;
/* get the space info for where the metadata will live */
alloc_target = btrfs_get_alloc_profile(root, 0);
meta_sinfo = __find_space_info(info, alloc_target);
- if (!meta_sinfo)
- goto alloc;
+ num_bytes = calculate_bytes_needed(root->fs_info->extent_root,
+ num_items);
+
+ spin_lock(&meta_sinfo->lock);
+ if (BTRFS_I(inode)->delalloc_reserved_extents <=
+ BTRFS_I(inode)->delalloc_extents) {
+ spin_unlock(&meta_sinfo->lock);
+ return 0;
+ }
+
+ BTRFS_I(inode)->delalloc_reserved_extents--;
+ BUG_ON(BTRFS_I(inode)->delalloc_reserved_extents < 0);
+
+ if (meta_sinfo->bytes_delalloc < num_bytes) {
+ bug = true;
+ meta_sinfo->bytes_delalloc = 0;
+ } else {
+ meta_sinfo->bytes_delalloc -= num_bytes;
+ }
+ spin_unlock(&meta_sinfo->lock);
+
+ BUG_ON(bug);
+
+ return 0;
+}
+
+static void check_force_delalloc(struct btrfs_space_info *meta_sinfo)
+{
+ u64 thresh;
+
+ thresh = meta_sinfo->bytes_used + meta_sinfo->bytes_reserved +
+ meta_sinfo->bytes_pinned + meta_sinfo->bytes_readonly +
+ meta_sinfo->bytes_super + meta_sinfo->bytes_root +
+ meta_sinfo->bytes_may_use;
+
+ thresh = meta_sinfo->total_bytes - thresh;
+ thresh *= 80;
+ do_div(thresh, 100);
+ if (thresh <= meta_sinfo->bytes_delalloc)
+ meta_sinfo->force_delalloc = 1;
+ else
+ meta_sinfo->force_delalloc = 0;
+}
+
+static int maybe_allocate_chunk(struct btrfs_root *root,
+ struct btrfs_space_info *info)
+{
+ struct btrfs_super_block *disk_super = &root->fs_info->super_copy;
+ struct btrfs_trans_handle *trans;
+ bool wait = false;
+ int ret = 0;
+ u64 min_metadata;
+ u64 free_space;
+
+ free_space = btrfs_super_total_bytes(disk_super);
+ /*
+ * we allow the metadata to grow to a max of either 5gb or 5% of the
+ * space in the volume.
+ */
+ min_metadata = min((u64)5 * 1024 * 1024 * 1024,
+ div64_u64(free_space * 5, 100));
+ if (info->total_bytes >= min_metadata) {
+ spin_unlock(&info->lock);
+ return 0;
+ }
+
+ if (info->full) {
+ spin_unlock(&info->lock);
+ return 0;
+ }
+
+ if (!info->allocating_chunk) {
+ info->force_alloc = 1;
+ info->allocating_chunk = 1;
+ init_waitqueue_head(&info->wait);
+ } else {
+ wait = true;
+ }
+
+ spin_unlock(&info->lock);
+
+ if (wait) {
+ wait_event(info->wait,
+ !info->allocating_chunk);
+ return 1;
+ }
+
+ trans = btrfs_start_transaction(root, 1);
+ if (!trans) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = do_chunk_alloc(trans, root->fs_info->extent_root,
+ 4096 + 2 * 1024 * 1024,
+ info->flags, 0);
+ btrfs_end_transaction(trans, root);
+ if (ret)
+ goto out;
+out:
+ spin_lock(&info->lock);
+ info->allocating_chunk = 0;
+ spin_unlock(&info->lock);
+ wake_up(&info->wait);
+
+ if (ret)
+ return 0;
+ return 1;
+}
+
+/*
+ * Reserve metadata space for delalloc.
+ */
+int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
+ struct inode *inode, int num_items)
+{
+ struct btrfs_fs_info *info = root->fs_info;
+ struct btrfs_space_info *meta_sinfo;
+ u64 num_bytes;
+ u64 used;
+ u64 alloc_target;
+ int flushed = 0;
+ int force_delalloc;
+
+ /* get the space info for where the metadata will live */
+ alloc_target = btrfs_get_alloc_profile(root, 0);
+ meta_sinfo = __find_space_info(info, alloc_target);
+
+ num_bytes = calculate_bytes_needed(root->fs_info->extent_root,
+ num_items);
again:
spin_lock(&meta_sinfo->lock);
- if (!meta_sinfo->full)
- thresh = meta_sinfo->total_bytes * 80;
- else
- thresh = meta_sinfo->total_bytes * 95;
- do_div(thresh, 100);
+ force_delalloc = meta_sinfo->force_delalloc;
- if (meta_sinfo->bytes_used + meta_sinfo->bytes_reserved +
- meta_sinfo->bytes_pinned + meta_sinfo->bytes_readonly +
- meta_sinfo->bytes_super > thresh) {
- struct btrfs_trans_handle *trans;
- if (!meta_sinfo->full) {
- meta_sinfo->force_alloc = 1;
+ if (unlikely(!meta_sinfo->bytes_root))
+ meta_sinfo->bytes_root = calculate_bytes_needed(root, 6);
+
+ if (!flushed)
+ meta_sinfo->bytes_delalloc += num_bytes;
+
+ used = meta_sinfo->bytes_used + meta_sinfo->bytes_reserved +
+ meta_sinfo->bytes_pinned + meta_sinfo->bytes_readonly +
+ meta_sinfo->bytes_super + meta_sinfo->bytes_root +
+ meta_sinfo->bytes_may_use + meta_sinfo->bytes_delalloc;
+
+ if (used > meta_sinfo->total_bytes) {
+ flushed++;
+
+ if (flushed == 1) {
+ if (maybe_allocate_chunk(root, meta_sinfo))
+ goto again;
+ flushed++;
+ } else {
spin_unlock(&meta_sinfo->lock);
-alloc:
- trans = btrfs_start_transaction(root, 1);
- if (!trans)
- return -ENOMEM;
+ }
- ret = do_chunk_alloc(trans, root->fs_info->extent_root,
- 2 * 1024 * 1024, alloc_target, 0);
- btrfs_end_transaction(trans, root);
- if (!meta_sinfo) {
- meta_sinfo = __find_space_info(info,
- alloc_target);
- }
+ if (flushed == 2) {
+ filemap_flush(inode->i_mapping);
+ goto again;
+ } else if (flushed == 3) {
+ btrfs_start_delalloc_inodes(root);
+ btrfs_wait_ordered_extents(root, 0);
goto again;
}
+ spin_lock(&meta_sinfo->lock);
+ meta_sinfo->bytes_delalloc -= num_bytes;
spin_unlock(&meta_sinfo->lock);
-
- if (!committed) {
- committed = 1;
- trans = btrfs_join_transaction(root, 1);
- if (!trans)
- return -ENOMEM;
- ret = btrfs_commit_transaction(trans, root);
- if (ret)
- return ret;
- goto again;
- }
+ printk(KERN_ERR "enospc, has %d, reserved %d\n",
+ BTRFS_I(inode)->delalloc_extents,
+ BTRFS_I(inode)->delalloc_reserved_extents);
+ dump_space_info(meta_sinfo, 0, 0);
return -ENOSPC;
}
+
+ BTRFS_I(inode)->delalloc_reserved_extents++;
+ check_force_delalloc(meta_sinfo);
+ spin_unlock(&meta_sinfo->lock);
+
+ if (!flushed && force_delalloc)
+ filemap_flush(inode->i_mapping);
+
+ return 0;
+}
+
+/*
+ * unreserve num_items number of items worth of metadata space. This needs to
+ * be paired with btrfs_reserve_metadata_space.
+ *
+ * NOTE: if you have the option, run this _AFTER_ you do a
+ * btrfs_end_transaction, since btrfs_end_transaction will run delayed ref
+ * oprations which will result in more used metadata, so we want to make sure we
+ * can do that without issue.
+ */
+int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items)
+{
+ struct btrfs_fs_info *info = root->fs_info;
+ struct btrfs_space_info *meta_sinfo;
+ u64 num_bytes;
+ u64 alloc_target;
+ bool bug = false;
+
+ /* get the space info for where the metadata will live */
+ alloc_target = btrfs_get_alloc_profile(root, 0);
+ meta_sinfo = __find_space_info(info, alloc_target);
+
+ num_bytes = calculate_bytes_needed(root, num_items);
+
+ spin_lock(&meta_sinfo->lock);
+ if (meta_sinfo->bytes_may_use < num_bytes) {
+ bug = true;
+ meta_sinfo->bytes_may_use = 0;
+ } else {
+ meta_sinfo->bytes_may_use -= num_bytes;
+ }
+ spin_unlock(&meta_sinfo->lock);
+
+ BUG_ON(bug);
+
+ return 0;
+}
+
+/*
+ * Reserve some metadata space for use. We'll calculate the worste case number
+ * of bytes that would be needed to modify num_items number of items. If we
+ * have space, fantastic, if not, you get -ENOSPC. Please call
+ * btrfs_unreserve_metadata_space when you are done for the _SAME_ number of
+ * items you reserved, since whatever metadata you needed should have already
+ * been allocated.
+ *
+ * This will commit the transaction to make more space if we don't have enough
+ * metadata space. THe only time we don't do this is if we're reserving space
+ * inside of a transaction, then we will just return -ENOSPC and it is the
+ * callers responsibility to handle it properly.
+ */
+int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items)
+{
+ struct btrfs_fs_info *info = root->fs_info;
+ struct btrfs_space_info *meta_sinfo;
+ u64 num_bytes;
+ u64 used;
+ u64 alloc_target;
+ int retries = 0;
+
+ /* get the space info for where the metadata will live */
+ alloc_target = btrfs_get_alloc_profile(root, 0);
+ meta_sinfo = __find_space_info(info, alloc_target);
+
+ num_bytes = calculate_bytes_needed(root, num_items);
+again:
+ spin_lock(&meta_sinfo->lock);
+
+ if (unlikely(!meta_sinfo->bytes_root))
+ meta_sinfo->bytes_root = calculate_bytes_needed(root, 6);
+
+ if (!retries)
+ meta_sinfo->bytes_may_use += num_bytes;
+
+ used = meta_sinfo->bytes_used + meta_sinfo->bytes_reserved +
+ meta_sinfo->bytes_pinned + meta_sinfo->bytes_readonly +
+ meta_sinfo->bytes_super + meta_sinfo->bytes_root +
+ meta_sinfo->bytes_may_use + meta_sinfo->bytes_delalloc;
+
+ if (used > meta_sinfo->total_bytes) {
+ retries++;
+ if (retries == 1) {
+ if (maybe_allocate_chunk(root, meta_sinfo))
+ goto again;
+ retries++;
+ } else {
+ spin_unlock(&meta_sinfo->lock);
+ }
+
+ if (retries == 2) {
+ btrfs_start_delalloc_inodes(root);
+ btrfs_wait_ordered_extents(root, 0);
+ goto again;
+ }
+ spin_lock(&meta_sinfo->lock);
+ meta_sinfo->bytes_may_use -= num_bytes;
+ spin_unlock(&meta_sinfo->lock);
+
+ dump_space_info(meta_sinfo, 0, 0);
+ return -ENOSPC;
+ }
+
+ check_force_delalloc(meta_sinfo);
spin_unlock(&meta_sinfo->lock);
return 0;
@@ -2888,7 +3169,7 @@
spin_unlock(&data_sinfo->lock);
/* commit the current transaction and try again */
- if (!committed) {
+ if (!committed && !root->fs_info->open_ioctl_trans) {
committed = 1;
trans = btrfs_join_transaction(root, 1);
if (!trans)
@@ -2916,7 +3197,7 @@
BTRFS_I(inode)->reserved_bytes += bytes;
spin_unlock(&data_sinfo->lock);
- return btrfs_check_metadata_free_space(root);
+ return 0;
}
/*
@@ -3015,17 +3296,15 @@
BUG_ON(!space_info);
spin_lock(&space_info->lock);
- if (space_info->force_alloc) {
+ if (space_info->force_alloc)
force = 1;
- space_info->force_alloc = 0;
- }
if (space_info->full) {
spin_unlock(&space_info->lock);
goto out;
}
thresh = space_info->total_bytes - space_info->bytes_readonly;
- thresh = div_factor(thresh, 6);
+ thresh = div_factor(thresh, 8);
if (!force &&
(space_info->bytes_used + space_info->bytes_pinned +
space_info->bytes_reserved + alloc_bytes) < thresh) {
@@ -3039,7 +3318,7 @@
* we keep a reasonable number of metadata chunks allocated in the
* FS as well.
*/
- if (flags & BTRFS_BLOCK_GROUP_DATA) {
+ if (flags & BTRFS_BLOCK_GROUP_DATA && fs_info->metadata_ratio) {
fs_info->data_chunk_allocations++;
if (!(fs_info->data_chunk_allocations %
fs_info->metadata_ratio))
@@ -3047,8 +3326,11 @@
}
ret = btrfs_alloc_chunk(trans, extent_root, flags);
+ spin_lock(&space_info->lock);
if (ret)
space_info->full = 1;
+ space_info->force_alloc = 0;
+ spin_unlock(&space_info->lock);
out:
mutex_unlock(&extent_root->fs_info->chunk_mutex);
return ret;
@@ -4063,21 +4345,32 @@
return ret;
}
-static void dump_space_info(struct btrfs_space_info *info, u64 bytes)
+static void dump_space_info(struct btrfs_space_info *info, u64 bytes,
+ int dump_block_groups)
{
struct btrfs_block_group_cache *cache;
+ spin_lock(&info->lock);
printk(KERN_INFO "space_info has %llu free, is %sfull\n",
(unsigned long long)(info->total_bytes - info->bytes_used -
- info->bytes_pinned - info->bytes_reserved),
+ info->bytes_pinned - info->bytes_reserved -
+ info->bytes_super),
(info->full) ? "" : "not ");
printk(KERN_INFO "space_info total=%llu, pinned=%llu, delalloc=%llu,"
- " may_use=%llu, used=%llu\n",
+ " may_use=%llu, used=%llu, root=%llu, super=%llu, reserved=%llu"
+ "\n",
(unsigned long long)info->total_bytes,
(unsigned long long)info->bytes_pinned,
(unsigned long long)info->bytes_delalloc,
(unsigned long long)info->bytes_may_use,
- (unsigned long long)info->bytes_used);
+ (unsigned long long)info->bytes_used,
+ (unsigned long long)info->bytes_root,
+ (unsigned long long)info->bytes_super,
+ (unsigned long long)info->bytes_reserved);
+ spin_unlock(&info->lock);
+
+ if (!dump_block_groups)
+ return;
down_read(&info->groups_sem);
list_for_each_entry(cache, &info->block_groups, list) {
@@ -4145,7 +4438,7 @@
printk(KERN_ERR "btrfs allocation failed flags %llu, "
"wanted %llu\n", (unsigned long long)data,
(unsigned long long)num_bytes);
- dump_space_info(sinfo, num_bytes);
+ dump_space_info(sinfo, num_bytes, 1);
}
return ret;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 0cb88f8..de1793b 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -280,6 +280,14 @@
return NULL;
}
+static void merge_cb(struct extent_io_tree *tree, struct extent_state *new,
+ struct extent_state *other)
+{
+ if (tree->ops && tree->ops->merge_extent_hook)
+ tree->ops->merge_extent_hook(tree->mapping->host, new,
+ other);
+}
+
/*
* utility function to look for merge candidates inside a given range.
* Any extents with matching state are merged together into a single
@@ -303,6 +311,7 @@
other = rb_entry(other_node, struct extent_state, rb_node);
if (other->end == state->start - 1 &&
other->state == state->state) {
+ merge_cb(tree, state, other);
state->start = other->start;
other->tree = NULL;
rb_erase(&other->rb_node, &tree->state);
@@ -314,33 +323,37 @@
other = rb_entry(other_node, struct extent_state, rb_node);
if (other->start == state->end + 1 &&
other->state == state->state) {
+ merge_cb(tree, state, other);
other->start = state->start;
state->tree = NULL;
rb_erase(&state->rb_node, &tree->state);
free_extent_state(state);
+ state = NULL;
}
}
+
return 0;
}
-static void set_state_cb(struct extent_io_tree *tree,
+static int set_state_cb(struct extent_io_tree *tree,
struct extent_state *state,
unsigned long bits)
{
if (tree->ops && tree->ops->set_bit_hook) {
- tree->ops->set_bit_hook(tree->mapping->host, state->start,
- state->end, state->state, bits);
+ return tree->ops->set_bit_hook(tree->mapping->host,
+ state->start, state->end,
+ state->state, bits);
}
+
+ return 0;
}
static void clear_state_cb(struct extent_io_tree *tree,
struct extent_state *state,
unsigned long bits)
{
- if (tree->ops && tree->ops->clear_bit_hook) {
- tree->ops->clear_bit_hook(tree->mapping->host, state->start,
- state->end, state->state, bits);
- }
+ if (tree->ops && tree->ops->clear_bit_hook)
+ tree->ops->clear_bit_hook(tree->mapping->host, state, bits);
}
/*
@@ -358,6 +371,7 @@
int bits)
{
struct rb_node *node;
+ int ret;
if (end < start) {
printk(KERN_ERR "btrfs end < start %llu %llu\n",
@@ -365,11 +379,14 @@
(unsigned long long)start);
WARN_ON(1);
}
- if (bits & EXTENT_DIRTY)
- tree->dirty_bytes += end - start + 1;
state->start = start;
state->end = end;
- set_state_cb(tree, state, bits);
+ ret = set_state_cb(tree, state, bits);
+ if (ret)
+ return ret;
+
+ if (bits & EXTENT_DIRTY)
+ tree->dirty_bytes += end - start + 1;
state->state |= bits;
node = tree_insert(&tree->state, end, &state->rb_node);
if (node) {
@@ -387,6 +404,15 @@
return 0;
}
+static int split_cb(struct extent_io_tree *tree, struct extent_state *orig,
+ u64 split)
+{
+ if (tree->ops && tree->ops->split_extent_hook)
+ return tree->ops->split_extent_hook(tree->mapping->host,
+ orig, split);
+ return 0;
+}
+
/*
* split a given extent state struct in two, inserting the preallocated
* struct 'prealloc' as the newly created second half. 'split' indicates an
@@ -405,6 +431,9 @@
struct extent_state *prealloc, u64 split)
{
struct rb_node *node;
+
+ split_cb(tree, orig, split);
+
prealloc->start = orig->start;
prealloc->end = split - 1;
prealloc->state = orig->state;
@@ -542,8 +571,8 @@
if (err)
goto out;
if (state->end <= end) {
- set |= clear_state_bit(tree, state, bits,
- wake, delete);
+ set |= clear_state_bit(tree, state, bits, wake,
+ delete);
if (last_end == (u64)-1)
goto out;
start = last_end + 1;
@@ -561,12 +590,11 @@
prealloc = alloc_extent_state(GFP_ATOMIC);
err = split_state(tree, state, prealloc, end + 1);
BUG_ON(err == -EEXIST);
-
if (wake)
wake_up(&state->wq);
- set |= clear_state_bit(tree, prealloc, bits,
- wake, delete);
+ set |= clear_state_bit(tree, prealloc, bits, wake, delete);
+
prealloc = NULL;
goto out;
}
@@ -667,16 +695,23 @@
return 0;
}
-static void set_state_bits(struct extent_io_tree *tree,
+static int set_state_bits(struct extent_io_tree *tree,
struct extent_state *state,
int bits)
{
+ int ret;
+
+ ret = set_state_cb(tree, state, bits);
+ if (ret)
+ return ret;
+
if ((bits & EXTENT_DIRTY) && !(state->state & EXTENT_DIRTY)) {
u64 range = state->end - state->start + 1;
tree->dirty_bytes += range;
}
- set_state_cb(tree, state, bits);
state->state |= bits;
+
+ return 0;
}
static void cache_state(struct extent_state *state,
@@ -758,7 +793,10 @@
goto out;
}
- set_state_bits(tree, state, bits);
+ err = set_state_bits(tree, state, bits);
+ if (err)
+ goto out;
+
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -805,7 +843,9 @@
if (err)
goto out;
if (state->end <= end) {
- set_state_bits(tree, state, bits);
+ err = set_state_bits(tree, state, bits);
+ if (err)
+ goto out;
cache_state(state, cached_state);
merge_state(tree, state);
if (last_end == (u64)-1)
@@ -829,11 +869,13 @@
this_end = last_start - 1;
err = insert_state(tree, prealloc, start, this_end,
bits);
+ BUG_ON(err == -EEXIST);
+ if (err) {
+ prealloc = NULL;
+ goto out;
+ }
cache_state(prealloc, cached_state);
prealloc = NULL;
- BUG_ON(err == -EEXIST);
- if (err)
- goto out;
start = this_end + 1;
goto search_again;
}
@@ -852,7 +894,11 @@
err = split_state(tree, state, prealloc, end + 1);
BUG_ON(err == -EEXIST);
- set_state_bits(tree, prealloc, bits);
+ err = set_state_bits(tree, prealloc, bits);
+ if (err) {
+ prealloc = NULL;
+ goto out;
+ }
cache_state(prealloc, cached_state);
merge_state(tree, prealloc);
prealloc = NULL;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 14ed16f..4794ec8 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -60,8 +60,13 @@
struct extent_state *state, int uptodate);
int (*set_bit_hook)(struct inode *inode, u64 start, u64 end,
unsigned long old, unsigned long bits);
- int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end,
- unsigned long old, unsigned long bits);
+ int (*clear_bit_hook)(struct inode *inode, struct extent_state *state,
+ unsigned long bits);
+ int (*merge_extent_hook)(struct inode *inode,
+ struct extent_state *new,
+ struct extent_state *other);
+ int (*split_extent_hook)(struct inode *inode,
+ struct extent_state *orig, u64 split);
int (*write_cache_pages_lock_hook)(struct page *page);
};
@@ -79,10 +84,14 @@
u64 start;
u64 end; /* inclusive */
struct rb_node rb_node;
+
+ /* ADD NEW ELEMENTS AFTER THIS */
struct extent_io_tree *tree;
wait_queue_head_t wq;
atomic_t refs;
unsigned long state;
+ u64 split_start;
+ u64 split_end;
/* for use by the FS */
u64 private;
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 9ed17dbe..f19e125 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -123,7 +123,10 @@
root->sectorsize - 1) & ~((u64)root->sectorsize - 1);
end_of_last_block = start_pos + num_bytes - 1;
- btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block);
+ err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block);
+ if (err)
+ return err;
+
for (i = 0; i < num_pages; i++) {
struct page *p = pages[i];
SetPageUptodate(p);
@@ -917,21 +920,35 @@
start_pos = pos;
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
+
+ /* do the reserve before the mutex lock in case we have to do some
+ * flushing. We wouldn't deadlock, but this is more polite.
+ */
+ err = btrfs_reserve_metadata_for_delalloc(root, inode, 1);
+ if (err)
+ goto out_nolock;
+
+ mutex_lock(&inode->i_mutex);
+
current->backing_dev_info = inode->i_mapping->backing_dev_info;
err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
if (err)
- goto out_nolock;
+ goto out;
+
if (count == 0)
- goto out_nolock;
+ goto out;
err = file_remove_suid(file);
if (err)
- goto out_nolock;
+ goto out;
+
file_update_time(file);
pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL);
- mutex_lock(&inode->i_mutex);
+ /* generic_write_checks can change our pos */
+ start_pos = pos;
+
BTRFS_I(inode)->sequence++;
first_index = pos >> PAGE_CACHE_SHIFT;
last_index = (pos + count) >> PAGE_CACHE_SHIFT;
@@ -1005,9 +1022,8 @@
}
if (will_write) {
- btrfs_fdatawrite_range(inode->i_mapping, pos,
- pos + write_bytes - 1,
- WB_SYNC_ALL);
+ filemap_fdatawrite_range(inode->i_mapping, pos,
+ pos + write_bytes - 1);
} else {
balance_dirty_pages_ratelimited_nr(inode->i_mapping,
num_pages);
@@ -1028,6 +1044,7 @@
mutex_unlock(&inode->i_mutex);
if (ret)
err = ret;
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
out_nolock:
kfree(pages);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index b9fe06d..112e5aa 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1159,6 +1159,83 @@
return ret;
}
+static int btrfs_split_extent_hook(struct inode *inode,
+ struct extent_state *orig, u64 split)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 size;
+
+ if (!(orig->state & EXTENT_DELALLOC))
+ return 0;
+
+ size = orig->end - orig->start + 1;
+ if (size > root->fs_info->max_extent) {
+ u64 num_extents;
+ u64 new_size;
+
+ new_size = orig->end - split + 1;
+ num_extents = div64_u64(size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent);
+
+ /*
+ * if we break a large extent up then leave delalloc_extents be,
+ * since we've already accounted for the large extent.
+ */
+ if (div64_u64(new_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent) < num_extents)
+ return 0;
+ }
+
+ BTRFS_I(inode)->delalloc_extents++;
+
+ return 0;
+}
+
+/*
+ * extent_io.c merge_extent_hook, used to track merged delayed allocation
+ * extents so we can keep track of new extents that are just merged onto old
+ * extents, such as when we are doing sequential writes, so we can properly
+ * account for the metadata space we'll need.
+ */
+static int btrfs_merge_extent_hook(struct inode *inode,
+ struct extent_state *new,
+ struct extent_state *other)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ u64 new_size, old_size;
+ u64 num_extents;
+
+ /* not delalloc, ignore it */
+ if (!(other->state & EXTENT_DELALLOC))
+ return 0;
+
+ old_size = other->end - other->start + 1;
+ if (new->start < other->start)
+ new_size = other->end - new->start + 1;
+ else
+ new_size = new->end - other->start + 1;
+
+ /* we're not bigger than the max, unreserve the space and go */
+ if (new_size <= root->fs_info->max_extent) {
+ BTRFS_I(inode)->delalloc_extents--;
+ return 0;
+ }
+
+ /*
+ * If we grew by another max_extent, just return, we want to keep that
+ * reserved amount.
+ */
+ num_extents = div64_u64(old_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent);
+ if (div64_u64(new_size + root->fs_info->max_extent - 1,
+ root->fs_info->max_extent) > num_extents)
+ return 0;
+
+ BTRFS_I(inode)->delalloc_extents--;
+
+ return 0;
+}
+
/*
* extent_io.c set_bit_hook, used to track delayed allocation
* bytes in this file, and to maintain the list of inodes that
@@ -1167,6 +1244,7 @@
static int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
unsigned long old, unsigned long bits)
{
+
/*
* set_bit and clear bit hooks normally require _irqsave/restore
* but in this case, we are only testeing for the DELALLOC
@@ -1174,6 +1252,8 @@
*/
if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
+
+ BTRFS_I(inode)->delalloc_extents++;
btrfs_delalloc_reserve_space(root, inode, end - start + 1);
spin_lock(&root->fs_info->delalloc_lock);
BTRFS_I(inode)->delalloc_bytes += end - start + 1;
@@ -1190,22 +1270,27 @@
/*
* extent_io.c clear_bit_hook, see set_bit_hook for why
*/
-static int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
- unsigned long old, unsigned long bits)
+static int btrfs_clear_bit_hook(struct inode *inode,
+ struct extent_state *state, unsigned long bits)
{
/*
* set_bit and clear bit hooks normally require _irqsave/restore
* but in this case, we are only testeing for the DELALLOC
* bit, which is only set or cleared with irqs on
*/
- if ((old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
+ if ((state->state & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
+ BTRFS_I(inode)->delalloc_extents--;
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
+
spin_lock(&root->fs_info->delalloc_lock);
- if (end - start + 1 > root->fs_info->delalloc_bytes) {
+ if (state->end - state->start + 1 >
+ root->fs_info->delalloc_bytes) {
printk(KERN_INFO "btrfs warning: delalloc account "
"%llu %llu\n",
- (unsigned long long)end - start + 1,
+ (unsigned long long)
+ state->end - state->start + 1,
(unsigned long long)
root->fs_info->delalloc_bytes);
btrfs_delalloc_free_space(root, inode, (u64)-1);
@@ -1213,9 +1298,12 @@
BTRFS_I(inode)->delalloc_bytes = 0;
} else {
btrfs_delalloc_free_space(root, inode,
- end - start + 1);
- root->fs_info->delalloc_bytes -= end - start + 1;
- BTRFS_I(inode)->delalloc_bytes -= end - start + 1;
+ state->end -
+ state->start + 1);
+ root->fs_info->delalloc_bytes -= state->end -
+ state->start + 1;
+ BTRFS_I(inode)->delalloc_bytes -= state->end -
+ state->start + 1;
}
if (BTRFS_I(inode)->delalloc_bytes == 0 &&
!list_empty(&BTRFS_I(inode)->delalloc_inodes)) {
@@ -2950,7 +3038,12 @@
goto again;
}
- btrfs_set_extent_delalloc(inode, page_start, page_end);
+ ret = btrfs_set_extent_delalloc(inode, page_start, page_end);
+ if (ret) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ goto out_unlock;
+ }
+
ret = 0;
if (offset != PAGE_CACHE_SIZE) {
kaddr = kmap(page);
@@ -2981,15 +3074,11 @@
u64 last_byte;
u64 cur_offset;
u64 hole_size;
- int err;
+ int err = 0;
if (size <= hole_start)
return 0;
- err = btrfs_check_metadata_free_space(root);
- if (err)
- return err;
-
btrfs_truncate_page(inode->i_mapping, inode->i_size);
while (1) {
@@ -3024,12 +3113,18 @@
cur_offset, &hint_byte, 1);
if (err)
break;
+
+ err = btrfs_reserve_metadata_space(root, 1);
+ if (err)
+ break;
+
err = btrfs_insert_file_extent(trans, root,
inode->i_ino, cur_offset, 0,
0, hole_size, 0, hole_size,
0, 0, 0);
btrfs_drop_extent_cache(inode, hole_start,
last_byte - 1, 0);
+ btrfs_unreserve_metadata_space(root, 1);
}
free_extent_map(em);
cur_offset = last_byte;
@@ -3990,11 +4085,18 @@
if (!new_valid_dev(rdev))
return -EINVAL;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 for inode item and ref
+ * 2 for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto fail;
+ return err;
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
@@ -4032,6 +4134,7 @@
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -4052,10 +4155,18 @@
u64 objectid;
u64 index = 0;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 for inode item and ref
+ * 2 for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto fail;
+ return err;
+
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
@@ -4096,6 +4207,7 @@
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -4118,10 +4230,16 @@
if (inode->i_nlink == 0)
return -ENOENT;
- btrfs_inc_nlink(inode);
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 item for inode ref
+ * 2 items for dir items
+ */
+ err = btrfs_reserve_metadata_space(root, 3);
if (err)
- goto fail;
+ return err;
+
+ btrfs_inc_nlink(inode);
+
err = btrfs_set_inode_index(dir, &index);
if (err)
goto fail;
@@ -4145,6 +4263,7 @@
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
fail:
+ btrfs_unreserve_metadata_space(root, 3);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -4164,17 +4283,21 @@
u64 index = 0;
unsigned long nr = 1;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for inode and ref
+ * 2 items for dir items
+ * 1 for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto out_unlock;
+ return err;
trans = btrfs_start_transaction(root, 1);
- btrfs_set_trans_block_group(trans, dir);
-
- if (IS_ERR(trans)) {
- err = PTR_ERR(trans);
+ if (!trans) {
+ err = -ENOMEM;
goto out_unlock;
}
+ btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
if (err) {
@@ -4223,6 +4346,7 @@
btrfs_end_transaction_throttle(trans, root);
out_unlock:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_on_err)
iput(inode);
btrfs_btree_balance_dirty(root, nr);
@@ -4747,6 +4871,13 @@
goto out;
}
+ ret = btrfs_reserve_metadata_for_delalloc(root, inode, 1);
+ if (ret) {
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ ret = VM_FAULT_SIGBUS;
+ goto out;
+ }
+
ret = VM_FAULT_NOPAGE; /* make the VM retry the fault */
again:
lock_page(page);
@@ -4778,7 +4909,23 @@
goto again;
}
- btrfs_set_extent_delalloc(inode, page_start, page_end);
+ /*
+ * XXX - page_mkwrite gets called every time the page is dirtied, even
+ * if it was already dirty, so for space accounting reasons we need to
+ * clear any delalloc bits for the range we are fixing to save. There
+ * is probably a better way to do this, but for now keep consistent with
+ * prepare_pages in the normal write path.
+ */
+ clear_extent_bits(&BTRFS_I(inode)->io_tree, page_start, page_end,
+ EXTENT_DIRTY | EXTENT_DELALLOC, GFP_NOFS);
+
+ ret = btrfs_set_extent_delalloc(inode, page_start, page_end);
+ if (ret) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ ret = VM_FAULT_SIGBUS;
+ btrfs_free_reserved_data_space(root, inode, PAGE_CACHE_SIZE);
+ goto out_unlock;
+ }
ret = 0;
/* page is wholly or partially inside EOF */
@@ -4801,6 +4948,7 @@
unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
out_unlock:
+ btrfs_unreserve_metadata_for_delalloc(root, inode, 1);
if (!ret)
return VM_FAULT_LOCKED;
unlock_page(page);
@@ -4917,6 +5065,8 @@
return NULL;
ei->last_trans = 0;
ei->logged_trans = 0;
+ ei->delalloc_extents = 0;
+ ei->delalloc_reserved_extents = 0;
btrfs_ordered_inode_tree_init(&ei->ordered_tree);
INIT_LIST_HEAD(&ei->i_orphan);
INIT_LIST_HEAD(&ei->ordered_operations);
@@ -5070,7 +5220,12 @@
new_inode->i_size > BTRFS_EMPTY_DIR_SIZE)
return -ENOTEMPTY;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for dir items
+ * 1 item for orphan entry
+ * 1 item for ref
+ */
+ ret = btrfs_reserve_metadata_space(root, 4);
if (ret)
return ret;
@@ -5185,6 +5340,8 @@
if (old_inode->i_ino == BTRFS_FIRST_FREE_OBJECTID)
up_read(&root->fs_info->subvol_sem);
+
+ btrfs_unreserve_metadata_space(root, 4);
return ret;
}
@@ -5256,11 +5413,18 @@
if (name_len > BTRFS_MAX_INLINE_DATA_SIZE(root))
return -ENAMETOOLONG;
- err = btrfs_check_metadata_free_space(root);
+ /*
+ * 2 items for inode item and ref
+ * 2 items for dir items
+ * 1 item for xattr if selinux is on
+ */
+ err = btrfs_reserve_metadata_space(root, 5);
if (err)
- goto out_fail;
+ return err;
trans = btrfs_start_transaction(root, 1);
+ if (!trans)
+ goto out_fail;
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_objectid(trans, root, dir->i_ino, &objectid);
@@ -5341,6 +5505,7 @@
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
out_fail:
+ btrfs_unreserve_metadata_space(root, 5);
if (drop_inode) {
inode_dec_link_count(inode);
iput(inode);
@@ -5362,6 +5527,11 @@
while (num_bytes > 0) {
alloc_size = min(num_bytes, root->fs_info->max_extent);
+
+ ret = btrfs_reserve_metadata_space(root, 1);
+ if (ret)
+ goto out;
+
ret = btrfs_reserve_extent(trans, root, alloc_size,
root->sectorsize, 0, alloc_hint,
(u64)-1, &ins, 1);
@@ -5381,6 +5551,7 @@
num_bytes -= ins.offset;
cur_offset += ins.offset;
alloc_hint = ins.objectid + ins.offset;
+ btrfs_unreserve_metadata_space(root, 1);
}
out:
if (cur_offset > start) {
@@ -5566,6 +5737,8 @@
.readpage_io_failed_hook = btrfs_io_failed_hook,
.set_bit_hook = btrfs_set_bit_hook,
.clear_bit_hook = btrfs_clear_bit_hook,
+ .merge_extent_hook = btrfs_merge_extent_hook,
+ .split_extent_hook = btrfs_split_extent_hook,
};
/*
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a8577a7..9a780c8 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -239,7 +239,13 @@
u64 index = 0;
unsigned long nr = 1;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 - inode item
+ * 2 - refs
+ * 1 - root item
+ * 2 - dir items
+ */
+ ret = btrfs_reserve_metadata_space(root, 6);
if (ret)
return ret;
@@ -340,6 +346,9 @@
err = btrfs_commit_transaction(trans, root);
if (err && !ret)
ret = err;
+
+ btrfs_unreserve_metadata_space(root, 6);
+ btrfs_btree_balance_dirty(root, nr);
return ret;
}
@@ -355,19 +364,27 @@
if (!root->ref_cows)
return -EINVAL;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 - inode item
+ * 2 - refs
+ * 1 - root item
+ * 2 - dir items
+ */
+ ret = btrfs_reserve_metadata_space(root, 6);
if (ret)
goto fail_unlock;
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
if (!pending_snapshot) {
ret = -ENOMEM;
+ btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
}
pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
if (!pending_snapshot->name) {
ret = -ENOMEM;
kfree(pending_snapshot);
+ btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
}
memcpy(pending_snapshot->name, name, namelen);
@@ -1215,15 +1232,15 @@
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- int ret = 0;
+ int ret;
+ ret = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (file->private_data) {
- ret = -EINPROGRESS;
goto out;
- }
+
+ ret = -EINPROGRESS;
+ if (file->private_data)
+ goto out;
ret = mnt_want_write(file->f_path.mnt);
if (ret)
@@ -1233,12 +1250,19 @@
root->fs_info->open_ioctl_trans++;
mutex_unlock(&root->fs_info->trans_mutex);
+ ret = -ENOMEM;
trans = btrfs_start_ioctl_transaction(root, 0);
- if (trans)
- file->private_data = trans;
- else
- ret = -ENOMEM;
- /*printk(KERN_INFO "btrfs_ioctl_trans_start on %p\n", file);*/
+ if (!trans)
+ goto out_drop;
+
+ file->private_data = trans;
+ return 0;
+
+out_drop:
+ mutex_lock(&root->fs_info->trans_mutex);
+ root->fs_info->open_ioctl_trans--;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mnt_drop_write(file->f_path.mnt);
out:
return ret;
}
@@ -1254,24 +1278,20 @@
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- int ret = 0;
trans = file->private_data;
- if (!trans) {
- ret = -EINVAL;
- goto out;
- }
- btrfs_end_transaction(trans, root);
+ if (!trans)
+ return -EINVAL;
file->private_data = NULL;
+ btrfs_end_transaction(trans, root);
+
mutex_lock(&root->fs_info->trans_mutex);
root->fs_info->open_ioctl_trans--;
mutex_unlock(&root->fs_info->trans_mutex);
mnt_drop_write(file->f_path.mnt);
-
-out:
- return ret;
+ return 0;
}
long btrfs_ioctl(struct file *file, unsigned int
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index b5d6d24..897fba8 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -458,7 +458,7 @@
* start IO on any dirty ones so the wait doesn't stall waiting
* for pdflush to find them
*/
- btrfs_fdatawrite_range(inode->i_mapping, start, end, WB_SYNC_ALL);
+ filemap_fdatawrite_range(inode->i_mapping, start, end);
if (wait) {
wait_event(entry->wait, test_bit(BTRFS_ORDERED_COMPLETE,
&entry->flags));
@@ -488,17 +488,15 @@
/* start IO across the range first to instantiate any delalloc
* extents
*/
- btrfs_fdatawrite_range(inode->i_mapping, start, orig_end, WB_SYNC_ALL);
+ filemap_fdatawrite_range(inode->i_mapping, start, orig_end);
/* The compression code will leave pages locked but return from
* writepage without setting the page writeback. Starting again
* with WB_SYNC_ALL will end up waiting for the IO to actually start.
*/
- btrfs_fdatawrite_range(inode->i_mapping, start, orig_end, WB_SYNC_ALL);
+ filemap_fdatawrite_range(inode->i_mapping, start, orig_end);
- btrfs_wait_on_page_writeback_range(inode->i_mapping,
- start >> PAGE_CACHE_SHIFT,
- orig_end >> PAGE_CACHE_SHIFT);
+ filemap_fdatawait_range(inode->i_mapping, start, orig_end);
end = orig_end;
found = 0;
@@ -716,89 +714,6 @@
}
-/**
- * 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,
- };
- 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;
-}
-
/*
* add a given inode to the list of inodes that must be fully on
* disk before a transaction commit finishes.
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index 993a7ea..f82e874 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -153,10 +153,6 @@
int btrfs_ordered_update_i_size(struct inode *inode,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr, 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);
int btrfs_wait_ordered_extents(struct btrfs_root *root, int nocow_only);
int btrfs_run_ordered_operations(struct btrfs_root *root, int wait);
int btrfs_add_ordered_operation(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 6703538..9de9b22 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -344,7 +344,9 @@
sb->s_export_op = &btrfs_export_ops;
sb->s_xattr = btrfs_xattr_handlers;
sb->s_time_gran = 1;
+#ifdef CONFIG_BTRFS_POSIX_ACL
sb->s_flags |= MS_POSIXACL;
+#endif
tree_root = open_ctree(sb, fs_devices, (char *)data);
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 88f866f..0b8f36d 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -186,6 +186,9 @@
h->alloc_exclude_start = 0;
h->delayed_ref_updates = 0;
+ if (!current->journal_info)
+ current->journal_info = h;
+
root->fs_info->running_transaction->use_count++;
record_root_in_trans(h, root);
mutex_unlock(&root->fs_info->trans_mutex);
@@ -317,6 +320,9 @@
wake_up(&cur_trans->writer_wait);
put_transaction(cur_trans);
mutex_unlock(&info->trans_mutex);
+
+ if (current->journal_info == trans)
+ current->journal_info = NULL;
memset(trans, 0, sizeof(*trans));
kmem_cache_free(btrfs_trans_handle_cachep, trans);
@@ -743,6 +749,7 @@
memcpy(&pending->root_key, &key, sizeof(key));
fail:
kfree(new_root_item);
+ btrfs_unreserve_metadata_space(root, 6);
return ret;
}
@@ -1059,6 +1066,9 @@
mutex_unlock(&root->fs_info->trans_mutex);
+ if (current->journal_info == trans)
+ current->journal_info = NULL;
+
kmem_cache_free(btrfs_trans_handle_cachep, trans);
return ret;
}
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 23e7d36..7eda483 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -446,8 +446,10 @@
goto error;
device->name = kstrdup(orig_dev->name, GFP_NOFS);
- if (!device->name)
+ if (!device->name) {
+ kfree(device);
goto error;
+ }
device->devid = orig_dev->devid;
device->work.func = pending_bios_fn;
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index a9d3bf4..b0fc93f 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -260,7 +260,7 @@
* attributes are handled directly.
*/
struct xattr_handler *btrfs_xattr_handlers[] = {
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_BTRFS_POSIX_ACL
&btrfs_xattr_acl_access_handler,
&btrfs_xattr_acl_default_handler,
#endif