From f382e4653f06f4e285b7800f80e6548e026f90a8 Mon Sep 17 00:00:00 2001 From: Stefan Behrens Date: Thu, 16 Oct 2014 17:48:48 +0200 Subject: Btrfs: check_int: use the known block location The xfstest btrfs/014 which tests the balance operation caused issues with the check_int module. The attempt was made to use btrfs_map_block() to find the physical location for a written block. However, this was not at all needed since the location of the written block was known since a hook to submit_bio() was the reason for entering the check_int module. Additionally, after a block relocation it happened that btrfs_map_block() failed causing misleading error messages afterwards. This patch changes the check_int module to use the known information of the physical location from the bio. Reported-by: Wang Shilong Signed-off-by: Stefan Behrens Tested-by: Wang Shilong Signed-off-by: Chris Mason --- fs/btrfs/check-integrity.c | 66 ++++++++-------------------------------------- 1 file changed, 11 insertions(+), 55 deletions(-) diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c index 66e820f7b440..b5aa8124bf47 100644 --- a/fs/btrfs/check-integrity.c +++ b/fs/btrfs/check-integrity.c @@ -326,9 +326,6 @@ static int btrfsic_handle_extent_data(struct btrfsic_state *state, static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len, struct btrfsic_block_data_ctx *block_ctx_out, int mirror_num); -static int btrfsic_map_superblock(struct btrfsic_state *state, u64 bytenr, - u32 len, struct block_device *bdev, - struct btrfsic_block_data_ctx *block_ctx_out); static void btrfsic_release_block_ctx(struct btrfsic_block_data_ctx *block_ctx); static int btrfsic_read_block(struct btrfsic_state *state, struct btrfsic_block_data_ctx *block_ctx); @@ -1607,25 +1604,6 @@ static int btrfsic_map_block(struct btrfsic_state *state, u64 bytenr, u32 len, return ret; } -static int btrfsic_map_superblock(struct btrfsic_state *state, u64 bytenr, - u32 len, struct block_device *bdev, - struct btrfsic_block_data_ctx *block_ctx_out) -{ - block_ctx_out->dev = btrfsic_dev_state_lookup(bdev); - block_ctx_out->dev_bytenr = bytenr; - block_ctx_out->start = bytenr; - block_ctx_out->len = len; - block_ctx_out->datav = NULL; - block_ctx_out->pagev = NULL; - block_ctx_out->mem_to_free = NULL; - if (NULL != block_ctx_out->dev) { - return 0; - } else { - printk(KERN_INFO "btrfsic: error, cannot lookup dev (#2)!\n"); - return -ENXIO; - } -} - static void btrfsic_release_block_ctx(struct btrfsic_block_data_ctx *block_ctx) { if (block_ctx->mem_to_free) { @@ -2002,24 +1980,13 @@ again: } } - if (block->is_superblock) - ret = btrfsic_map_superblock(state, bytenr, - processed_len, - bdev, &block_ctx); - else - ret = btrfsic_map_block(state, bytenr, processed_len, - &block_ctx, 0); - if (ret) { - printk(KERN_INFO - "btrfsic: btrfsic_map_block(root @%llu)" - " failed!\n", bytenr); - goto continue_loop; - } - block_ctx.datav = mapped_datav; - /* the following is required in case of writes to mirrors, - * use the same that was used for the lookup */ block_ctx.dev = dev_state; block_ctx.dev_bytenr = dev_bytenr; + block_ctx.start = bytenr; + block_ctx.len = processed_len; + block_ctx.pagev = NULL; + block_ctx.mem_to_free = NULL; + block_ctx.datav = mapped_datav; if (is_metadata || state->include_extent_data) { block->never_written = 0; @@ -2133,10 +2100,6 @@ again: /* this is getting ugly for the * include_extent_data case... */ bytenr = 0; /* unknown */ - block_ctx.start = bytenr; - block_ctx.len = processed_len; - block_ctx.mem_to_free = NULL; - block_ctx.pagev = NULL; } else { processed_len = state->metablock_size; bytenr = btrfs_stack_header_bytenr( @@ -2149,22 +2112,15 @@ again: "Written block @%llu (%s/%llu/?)" " !found in hash table, M.\n", bytenr, dev_state->name, dev_bytenr); - - ret = btrfsic_map_block(state, bytenr, processed_len, - &block_ctx, 0); - if (ret) { - printk(KERN_INFO - "btrfsic: btrfsic_map_block(root @%llu)" - " failed!\n", - dev_bytenr); - goto continue_loop; - } } - block_ctx.datav = mapped_datav; - /* the following is required in case of writes to mirrors, - * use the same that was used for the lookup */ + block_ctx.dev = dev_state; block_ctx.dev_bytenr = dev_bytenr; + block_ctx.start = bytenr; + block_ctx.len = processed_len; + block_ctx.pagev = NULL; + block_ctx.mem_to_free = NULL; + block_ctx.datav = mapped_datav; block = btrfsic_block_alloc(); if (NULL == block) { -- cgit v1.2.3