Btrfs: add a delalloc mutex to inodes for delalloc reservations

[firefly-linux-kernel-4.4.55.git] / fs / btrfs / extent-tree.c

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index a44072a692ab684c59e229f266af5d9ae26953b4..e0ad5f0f895ea789ef8a7fe2b58f3ce3c523cabd 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3310,6 +3310,8 @@ commit_trans:
                return -ENOSPC;
        }
        data_sinfo->bytes_may_use += bytes;
+       trace_btrfs_space_reservation(root->fs_info, "space_info",
+                                     (u64)data_sinfo, bytes, 1);
        spin_unlock(&data_sinfo->lock);
 
        return 0;
@@ -3329,6 +3331,8 @@ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)
        data_sinfo = BTRFS_I(inode)->space_info;
        spin_lock(&data_sinfo->lock);
        data_sinfo->bytes_may_use -= bytes;
+       trace_btrfs_space_reservation(root->fs_info, "space_info",
+                                     (u64)data_sinfo, bytes, 0);
        spin_unlock(&data_sinfo->lock);
 }
 
@@ -3686,6 +3690,10 @@ again:
        if (used <= space_info->total_bytes) {
                if (used + orig_bytes <= space_info->total_bytes) {
                        space_info->bytes_may_use += orig_bytes;
+                       trace_btrfs_space_reservation(root->fs_info,
+                                                     "space_info",
+                                                     (u64)space_info,
+                                                     orig_bytes, 1);
                        ret = 0;
                } else {
                        /*
@@ -3753,6 +3761,10 @@ again:
 
                if (used + num_bytes < space_info->total_bytes + avail) {
                        space_info->bytes_may_use += orig_bytes;
+                       trace_btrfs_space_reservation(root->fs_info,
+                                                     "space_info",
+                                                     (u64)space_info,
+                                                     orig_bytes, 1);
                        ret = 0;
                } else {
                        wait_ordered = true;
@@ -3859,7 +3871,8 @@ static void block_rsv_add_bytes(struct btrfs_block_rsv *block_rsv,
        spin_unlock(&block_rsv->lock);
 }
 
-static void block_rsv_release_bytes(struct btrfs_block_rsv *block_rsv,
+static void block_rsv_release_bytes(struct btrfs_fs_info *fs_info,
+                                   struct btrfs_block_rsv *block_rsv,
                                    struct btrfs_block_rsv *dest, u64 num_bytes)
 {
        struct btrfs_space_info *space_info = block_rsv->space_info;
@@ -3895,6 +3908,9 @@ static void block_rsv_release_bytes(struct btrfs_block_rsv *block_rsv,
                if (num_bytes) {
                        spin_lock(&space_info->lock);
                        space_info->bytes_may_use -= num_bytes;
+                       trace_btrfs_space_reservation(fs_info, "space_info",
+                                                     (u64)space_info,
+                                                     num_bytes, 0);
                        space_info->reservation_progress++;
                        spin_unlock(&space_info->lock);
                }
@@ -4051,7 +4067,8 @@ void btrfs_block_rsv_release(struct btrfs_root *root,
        if (global_rsv->full || global_rsv == block_rsv ||
            block_rsv->space_info != global_rsv->space_info)
                global_rsv = NULL;
-       block_rsv_release_bytes(block_rsv, global_rsv, num_bytes);
+       block_rsv_release_bytes(root->fs_info, block_rsv, global_rsv,
+                               num_bytes);
 }
 
 /*
@@ -4110,11 +4127,15 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
                num_bytes = sinfo->total_bytes - num_bytes;
                block_rsv->reserved += num_bytes;
                sinfo->bytes_may_use += num_bytes;
+               trace_btrfs_space_reservation(fs_info, "space_info",
+                                             (u64)sinfo, num_bytes, 1);
        }
 
        if (block_rsv->reserved >= block_rsv->size) {
                num_bytes = block_rsv->reserved - block_rsv->size;
                sinfo->bytes_may_use -= num_bytes;
+               trace_btrfs_space_reservation(fs_info, "space_info",
+                                             (u64)sinfo, num_bytes, 0);
                sinfo->reservation_progress++;
                block_rsv->reserved = block_rsv->size;
                block_rsv->full = 1;
@@ -4149,7 +4170,8 @@ static void init_global_block_rsv(struct btrfs_fs_info *fs_info)
 
 static void release_global_block_rsv(struct btrfs_fs_info *fs_info)
 {
-       block_rsv_release_bytes(&fs_info->global_block_rsv, NULL, (u64)-1);
+       block_rsv_release_bytes(fs_info, &fs_info->global_block_rsv, NULL,
+                               (u64)-1);
        WARN_ON(fs_info->delalloc_block_rsv.size > 0);
        WARN_ON(fs_info->delalloc_block_rsv.reserved > 0);
        WARN_ON(fs_info->trans_block_rsv.size > 0);
@@ -4166,6 +4188,8 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
        if (!trans->bytes_reserved)
                return;
 
+       trace_btrfs_space_reservation(root->fs_info, "transaction", (u64)trans,
+                                     trans->bytes_reserved, 0);
        btrfs_block_rsv_release(root, trans->block_rsv, trans->bytes_reserved);
        trans->bytes_reserved = 0;
 }
@@ -4183,6 +4207,8 @@ int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
         * when we are truly done with the orphan item.
         */
        u64 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
+       trace_btrfs_space_reservation(root->fs_info, "orphan",
+                                     btrfs_ino(inode), num_bytes, 1);
        return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes);
 }
 
@@ -4190,6 +4216,8 @@ void btrfs_orphan_release_metadata(struct inode *inode)
 {
        struct btrfs_root *root = BTRFS_I(inode)->root;
        u64 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
+       trace_btrfs_space_reservation(root->fs_info, "orphan",
+                                     btrfs_ino(inode), num_bytes, 0);
        btrfs_block_rsv_release(root, root->orphan_block_rsv, num_bytes);
 }
 
@@ -4317,12 +4345,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
        /* Need to be holding the i_mutex here if we aren't free space cache */
        if (btrfs_is_free_space_inode(root, inode))
                flush = 0;
-       else
-               WARN_ON(!mutex_is_locked(&inode->i_mutex));
 
        if (flush && btrfs_transaction_in_commit(root->fs_info))
                schedule_timeout(1);
 
+       mutex_lock(&BTRFS_I(inode)->delalloc_mutex);
        num_bytes = ALIGN(num_bytes, root->sectorsize);
 
        spin_lock(&BTRFS_I(inode)->lock);
@@ -4370,8 +4397,14 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
                if (dropped)
                        to_free += btrfs_calc_trans_metadata_size(root, dropped);
 
-               if (to_free)
+               if (to_free) {
                        btrfs_block_rsv_release(root, block_rsv, to_free);
+                       trace_btrfs_space_reservation(root->fs_info,
+                                                     "delalloc",
+                                                     btrfs_ino(inode),
+                                                     to_free, 0);
+               }
+               mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
                return ret;
        }
 
@@ -4382,7 +4415,11 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
        }
        BTRFS_I(inode)->reserved_extents += nr_extents;
        spin_unlock(&BTRFS_I(inode)->lock);
+       mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
 
+       if (to_reserve)
+               trace_btrfs_space_reservation(root->fs_info,"delalloc",
+                                             btrfs_ino(inode), to_reserve, 1);
        block_rsv_add_bytes(block_rsv, to_reserve, 1);
 
        return 0;
@@ -4412,6 +4449,8 @@ void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes)
        if (dropped > 0)
                to_free += btrfs_calc_trans_metadata_size(root, dropped);
 
+       trace_btrfs_space_reservation(root->fs_info, "delalloc",
+                                     btrfs_ino(inode), to_free, 0);
        btrfs_block_rsv_release(root, &root->fs_info->delalloc_block_rsv,
                                to_free);
 }
@@ -4666,7 +4705,10 @@ static int btrfs_update_reserved_bytes(struct btrfs_block_group_cache *cache,
                        cache->reserved += num_bytes;
                        space_info->bytes_reserved += num_bytes;
                        if (reserve == RESERVE_ALLOC) {
-                               BUG_ON(space_info->bytes_may_use < num_bytes);
+                               trace_btrfs_space_reservation(cache->fs_info,
+                                                             "space_info",
+                                                             (u64)space_info,
+                                                             num_bytes, 0);
                                space_info->bytes_may_use -= num_bytes;
                        }
                }
@@ -5256,6 +5298,8 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
        ins->objectid = 0;
        ins->offset = 0;
 
+       trace_find_free_extent(orig_root, num_bytes, empty_size, data);
+
        space_info = __find_space_info(root->fs_info, data);
        if (!space_info) {
                printk(KERN_ERR "No space info for %llu\n", data);
@@ -5432,6 +5476,8 @@ alloc:
                        if (offset) {
                                /* we have a block, we're done */
                                spin_unlock(&last_ptr->refill_lock);
+                               trace_btrfs_reserve_extent_cluster(root,
+                                       block_group, search_start, num_bytes);
                                goto checks;
                        }
 
@@ -5490,6 +5536,9 @@ refill_cluster:
                                if (offset) {
                                        /* we found one, proceed */
                                        spin_unlock(&last_ptr->refill_lock);
+                                       trace_btrfs_reserve_extent_cluster(root,
+                                               block_group, search_start,
+                                               num_bytes);
                                        goto checks;
                                }
                        } else if (!cached && loop > LOOP_CACHING_NOWAIT
@@ -5576,6 +5625,8 @@ checks:
                ins->objectid = search_start;
                ins->offset = num_bytes;
 
+               trace_btrfs_reserve_extent(orig_root, block_group,
+                                          search_start, num_bytes);
                if (offset < search_start)
                        btrfs_add_free_space(used_block_group, offset,
                                             search_start - offset);
@@ -6117,10 +6168,11 @@ use_block_rsv(struct btrfs_trans_handle *trans,
        return ERR_PTR(-ENOSPC);
 }
 
-static void unuse_block_rsv(struct btrfs_block_rsv *block_rsv, u32 blocksize)
+static void unuse_block_rsv(struct btrfs_fs_info *fs_info,
+                           struct btrfs_block_rsv *block_rsv, u32 blocksize)
 {
        block_rsv_add_bytes(block_rsv, blocksize, 0);
-       block_rsv_release_bytes(block_rsv, NULL, 0);
+       block_rsv_release_bytes(fs_info, block_rsv, NULL, 0);
 }
 
 /*
@@ -6150,7 +6202,7 @@ struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
        ret = btrfs_reserve_extent(trans, root, blocksize, blocksize,
                                   empty_size, hint, (u64)-1, &ins, 0);
        if (ret) {
-               unuse_block_rsv(block_rsv, blocksize);
+               unuse_block_rsv(root->fs_info, block_rsv, blocksize);
                return ERR_PTR(ret);
        }