Btrfs: handle errors from btrfs_map_bio() everywhere

[cascardo/linux.git] / fs / btrfs / check-integrity.c

diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index 5a3e45d..badc6f1 100644 (file)
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -723,7 +723,7 @@ static int btrfsic_process_superblock(struct btrfsic_state *state,
                }
 
                num_copies =
-                   btrfs_num_copies(&state->root->fs_info->mapping_tree,
+                   btrfs_num_copies(state->root->fs_info,
                                     next_bytenr, state->metablock_size);
                if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
                        printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -903,7 +903,7 @@ static int btrfsic_process_superblock_dev_mirror(
                }
 
                num_copies =
-                   btrfs_num_copies(&state->root->fs_info->mapping_tree,
+                   btrfs_num_copies(state->root->fs_info,
                                     next_bytenr, state->metablock_size);
                if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
                        printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1287,7 +1287,7 @@ static int btrfsic_create_link_to_next_block(
        *next_blockp = NULL;
        if (0 == *num_copiesp) {
                *num_copiesp =
-                   btrfs_num_copies(&state->root->fs_info->mapping_tree,
+                   btrfs_num_copies(state->root->fs_info,
                                     next_bytenr, state->metablock_size);
                if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
                        printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1489,7 +1489,7 @@ static int btrfsic_handle_extent_data(
                        chunk_len = num_bytes;
 
                num_copies =
-                   btrfs_num_copies(&state->root->fs_info->mapping_tree,
+                   btrfs_num_copies(state->root->fs_info,
                                     next_bytenr, state->datablock_size);
                if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
                        printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -1582,9 +1582,21 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
        struct btrfs_device *device;
 
        length = len;
-       ret = btrfs_map_block(&state->root->fs_info->mapping_tree, READ,
+       ret = btrfs_map_block(state->root->fs_info, READ,
                              bytenr, &length, &multi, mirror_num);
 
+       if (ret) {
+               block_ctx_out->start = 0;
+               block_ctx_out->dev_bytenr = 0;
+               block_ctx_out->len = 0;
+               block_ctx_out->dev = NULL;
+               block_ctx_out->datav = NULL;
+               block_ctx_out->pagev = NULL;
+               block_ctx_out->mem_to_free = NULL;
+
+               return ret;
+       }
+
        device = multi->stripes[0].dev;
        block_ctx_out->dev = btrfsic_dev_state_lookup(device->bdev);
        block_ctx_out->dev_bytenr = multi->stripes[0].physical;
@@ -1594,8 +1606,7 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len,
        block_ctx_out->pagev = NULL;
        block_ctx_out->mem_to_free = NULL;
 
-       if (0 == ret)
-               kfree(multi);
+       kfree(multi);
        if (NULL == block_ctx_out->dev) {
                ret = -ENXIO;
                printk(KERN_INFO "btrfsic: error, cannot lookup dev (#1)!\n");
@@ -2463,7 +2474,7 @@ static int btrfsic_process_written_superblock(
                }
 
                num_copies =
-                   btrfs_num_copies(&state->root->fs_info->mapping_tree,
+                   btrfs_num_copies(state->root->fs_info,
                                     next_bytenr, BTRFS_SUPER_INFO_SIZE);
                if (state->print_mask & BTRFSIC_PRINT_MASK_NUM_COPIES)
                        printk(KERN_INFO "num_copies(log_bytenr=%llu) = %d\n",
@@ -2960,7 +2971,7 @@ static void btrfsic_cmp_log_and_dev_bytenr(struct btrfsic_state *state,
        struct btrfsic_block_data_ctx block_ctx;
        int match = 0;
 
-       num_copies = btrfs_num_copies(&state->root->fs_info->mapping_tree,
+       num_copies = btrfs_num_copies(state->root->fs_info,
                                      bytenr, state->metablock_size);
 
        for (mirror_num = 1; mirror_num <= num_copies; mirror_num++) {