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-rw-r--r--fs/btrfs/check-integrity.c163
1 files changed, 65 insertions, 98 deletions
diff --git a/fs/btrfs/check-integrity.c b/fs/btrfs/check-integrity.c
index cb7f3fe9c9f6..d897ef803b3b 100644
--- a/fs/btrfs/check-integrity.c
+++ b/fs/btrfs/check-integrity.c
@@ -94,6 +94,7 @@
#include <linux/mutex.h>
#include <linux/genhd.h>
#include <linux/blkdev.h>
+#include <linux/vmalloc.h>
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
@@ -326,9 +327,6 @@ 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);
@@ -1326,24 +1324,25 @@ static int btrfsic_create_link_to_next_block(
l = NULL;
next_block->generation = BTRFSIC_GENERATION_UNKNOWN;
} else {
- if (next_block->logical_bytenr != next_bytenr &&
- !(!next_block->is_metadata &&
- 0 == next_block->logical_bytenr)) {
- printk(KERN_INFO
- "Referenced block @%llu (%s/%llu/%d)"
- " found in hash table, %c,"
- " bytenr mismatch (!= stored %llu).\n",
- next_bytenr, next_block_ctx->dev->name,
- next_block_ctx->dev_bytenr, *mirror_nump,
- btrfsic_get_block_type(state, next_block),
- next_block->logical_bytenr);
- } else if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
- printk(KERN_INFO
- "Referenced block @%llu (%s/%llu/%d)"
- " found in hash table, %c.\n",
- next_bytenr, next_block_ctx->dev->name,
- next_block_ctx->dev_bytenr, *mirror_nump,
- btrfsic_get_block_type(state, next_block));
+ if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE) {
+ if (next_block->logical_bytenr != next_bytenr &&
+ !(!next_block->is_metadata &&
+ 0 == next_block->logical_bytenr))
+ printk(KERN_INFO
+ "Referenced block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+ next_bytenr, next_block_ctx->dev->name,
+ next_block_ctx->dev_bytenr, *mirror_nump,
+ btrfsic_get_block_type(state,
+ next_block),
+ next_block->logical_bytenr);
+ else
+ printk(KERN_INFO
+ "Referenced block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+ next_bytenr, next_block_ctx->dev->name,
+ next_block_ctx->dev_bytenr, *mirror_nump,
+ btrfsic_get_block_type(state,
+ next_block));
+ }
next_block->logical_bytenr = next_bytenr;
next_block->mirror_num = *mirror_nump;
@@ -1529,7 +1528,9 @@ static int btrfsic_handle_extent_data(
return -1;
}
if (!block_was_created) {
- if (next_block->logical_bytenr != next_bytenr &&
+ if ((state->print_mask &
+ BTRFSIC_PRINT_MASK_VERBOSE) &&
+ next_block->logical_bytenr != next_bytenr &&
!(!next_block->is_metadata &&
0 == next_block->logical_bytenr)) {
printk(KERN_INFO
@@ -1607,25 +1608,6 @@ 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) {
@@ -1901,25 +1883,26 @@ again:
dev_state,
dev_bytenr);
}
- if (block->logical_bytenr != bytenr &&
- !(!block->is_metadata &&
- block->logical_bytenr == 0))
- printk(KERN_INFO
- "Written block @%llu (%s/%llu/%d)"
- " found in hash table, %c,"
- " bytenr mismatch"
- " (!= stored %llu).\n",
- bytenr, dev_state->name, dev_bytenr,
- block->mirror_num,
- btrfsic_get_block_type(state, block),
- block->logical_bytenr);
- else if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE)
- printk(KERN_INFO
- "Written block @%llu (%s/%llu/%d)"
- " found in hash table, %c.\n",
- bytenr, dev_state->name, dev_bytenr,
- block->mirror_num,
- btrfsic_get_block_type(state, block));
+ if (state->print_mask & BTRFSIC_PRINT_MASK_VERBOSE) {
+ if (block->logical_bytenr != bytenr &&
+ !(!block->is_metadata &&
+ block->logical_bytenr == 0))
+ printk(KERN_INFO
+ "Written block @%llu (%s/%llu/%d) found in hash table, %c, bytenr mismatch (!= stored %llu).\n",
+ bytenr, dev_state->name,
+ dev_bytenr,
+ block->mirror_num,
+ btrfsic_get_block_type(state,
+ block),
+ block->logical_bytenr);
+ else
+ printk(KERN_INFO
+ "Written block @%llu (%s/%llu/%d) found in hash table, %c.\n",
+ bytenr, dev_state->name,
+ dev_bytenr, block->mirror_num,
+ btrfsic_get_block_type(state,
+ block));
+ }
block->logical_bytenr = bytenr;
} else {
if (num_pages * PAGE_CACHE_SIZE <
@@ -2002,24 +1985,13 @@ 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 +2105,6 @@ 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 +2117,15 @@ 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) {
@@ -3130,10 +3091,13 @@ int btrfsic_mount(struct btrfs_root *root,
root->sectorsize, PAGE_CACHE_SIZE);
return -1;
}
- state = kzalloc(sizeof(*state), GFP_NOFS);
- if (NULL == state) {
- printk(KERN_INFO "btrfs check-integrity: kmalloc() failed!\n");
- return -1;
+ state = kzalloc(sizeof(*state), GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT);
+ if (!state) {
+ state = vzalloc(sizeof(*state));
+ if (!state) {
+ printk(KERN_INFO "btrfs check-integrity: vzalloc() failed!\n");
+ return -1;
+ }
}
if (!btrfsic_is_initialized) {
@@ -3277,5 +3241,8 @@ void btrfsic_unmount(struct btrfs_root *root,
mutex_unlock(&btrfsic_mutex);
- kfree(state);
+ if (is_vmalloc_addr(state))
+ vfree(state);
+ else
+ kfree(state);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.