1 files changed, 28 insertions, 10 deletions

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 80599b4e42bd..444b3e9b92a4 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -675,21 +675,28 @@ struct btrfs_space_info {
                                    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;
 
+        /* for controlling how we free up space for allocations */
+        wait_queue_head_t allocate_wait;
+        wait_queue_head_t flush_wait;
+        int allocating_chunk;
+        int flushing;
+
         /* for block groups in our same type */
         struct list_head block_groups;
         spinlock_t lock;
@@ -903,6 +910,7 @@ struct btrfs_fs_info {
          * A third pool does submit_bio to avoid deadlocking with the other
          * two
          */
+        struct btrfs_workers generic_worker;
         struct btrfs_workers workers;
         struct btrfs_workers delalloc_workers;
         struct btrfs_workers endio_workers;
@@ -910,6 +918,7 @@ struct btrfs_fs_info {
         struct btrfs_workers endio_meta_write_workers;
         struct btrfs_workers endio_write_workers;
         struct btrfs_workers submit_workers;
+        struct btrfs_workers enospc_workers;
         /*
          * fixup workers take dirty pages that didn't properly go through
          * the cow mechanism and make them safe to write.  It happens
@@ -1000,7 +1009,10 @@ struct btrfs_root {
         atomic_t log_writers;
         atomic_t log_commit[2];
         unsigned long log_transid;
+        unsigned long last_log_commit;
         unsigned long log_batch;
+        pid_t log_start_pid;
+        bool log_multiple_pids;
 
         u64 objectid;
         u64 last_trans;
@@ -1141,6 +1153,7 @@ struct btrfs_root {
 #define BTRFS_MOUNT_FLUSHONCOMMIT       (1 << 7)
 #define BTRFS_MOUNT_SSD_SPREAD          (1 << 8)
 #define BTRFS_MOUNT_NOSSD               (1 << 9)
+#define BTRFS_MOUNT_DISCARD             (1 << 10)
 
 #define btrfs_clear_opt(o, opt)         ((o) &= ~BTRFS_MOUNT_##opt)
 #define btrfs_set_opt(o, opt)           ((o) |= BTRFS_MOUNT_##opt)
@@ -2022,7 +2035,12 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
 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,
@@ -2314,7 +2332,7 @@ int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode);
 void btrfs_orphan_cleanup(struct btrfs_root *root);
 int btrfs_cont_expand(struct inode *inode, loff_t size);
 int btrfs_invalidate_inodes(struct btrfs_root *root);
-extern struct dentry_operations btrfs_dentry_operations;
+extern const struct dentry_operations btrfs_dentry_operations;
 
 /* ioctl.c */
 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
@@ -2326,7 +2344,7 @@ int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync);
 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
                             int skip_pinned);
 int btrfs_check_file(struct btrfs_root *root, struct inode *inode);
-extern struct file_operations btrfs_file_operations;
+extern const struct file_operations btrfs_file_operations;
 int btrfs_drop_extents(struct btrfs_trans_handle *trans,
                        struct btrfs_root *root, struct inode *inode,
                        u64 start, u64 end, u64 locked_end,
@@ -2357,7 +2375,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options);
 int btrfs_sync_fs(struct super_block *sb, int wait);
 
 /* acl.c */
-#ifdef CONFIG_FS_POSIX_ACL
+#ifdef CONFIG_BTRFS_FS_POSIX_ACL
 int btrfs_check_acl(struct inode *inode, int mask);
 #else
 #define btrfs_check_acl NULL