514ac8ad87
If we truncate an uncompressed inline item, ram_bytes isn't updated to reflect the new size. The fixe uses the size directly from the item header when reading uncompressed inlines, and also fixes truncate to update the size as it goes. Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Chris Mason <clm@fb.com> CC: stable@vger.kernel.org
350 lines
11 KiB
C
350 lines
11 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include "ctree.h"
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#include "disk-io.h"
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#include "print-tree.h"
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static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
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{
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int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
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int i;
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printk(KERN_INFO "\t\tchunk length %llu owner %llu type %llu "
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"num_stripes %d\n",
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btrfs_chunk_length(eb, chunk), btrfs_chunk_owner(eb, chunk),
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btrfs_chunk_type(eb, chunk), num_stripes);
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for (i = 0 ; i < num_stripes ; i++) {
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printk(KERN_INFO "\t\t\tstripe %d devid %llu offset %llu\n", i,
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btrfs_stripe_devid_nr(eb, chunk, i),
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btrfs_stripe_offset_nr(eb, chunk, i));
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}
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}
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static void print_dev_item(struct extent_buffer *eb,
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struct btrfs_dev_item *dev_item)
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{
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printk(KERN_INFO "\t\tdev item devid %llu "
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"total_bytes %llu bytes used %llu\n",
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btrfs_device_id(eb, dev_item),
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btrfs_device_total_bytes(eb, dev_item),
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btrfs_device_bytes_used(eb, dev_item));
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}
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static void print_extent_data_ref(struct extent_buffer *eb,
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struct btrfs_extent_data_ref *ref)
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{
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printk(KERN_INFO "\t\textent data backref root %llu "
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"objectid %llu offset %llu count %u\n",
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btrfs_extent_data_ref_root(eb, ref),
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btrfs_extent_data_ref_objectid(eb, ref),
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btrfs_extent_data_ref_offset(eb, ref),
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btrfs_extent_data_ref_count(eb, ref));
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}
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static void print_extent_item(struct extent_buffer *eb, int slot)
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{
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struct btrfs_extent_item *ei;
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struct btrfs_extent_inline_ref *iref;
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struct btrfs_extent_data_ref *dref;
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struct btrfs_shared_data_ref *sref;
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struct btrfs_disk_key key;
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unsigned long end;
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unsigned long ptr;
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int type;
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u32 item_size = btrfs_item_size_nr(eb, slot);
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u64 flags;
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u64 offset;
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if (item_size < sizeof(*ei)) {
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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struct btrfs_extent_item_v0 *ei0;
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BUG_ON(item_size != sizeof(*ei0));
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ei0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_item_v0);
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printk(KERN_INFO "\t\textent refs %u\n",
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btrfs_extent_refs_v0(eb, ei0));
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return;
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#else
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BUG();
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#endif
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}
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ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
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flags = btrfs_extent_flags(eb, ei);
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printk(KERN_INFO "\t\textent refs %llu gen %llu flags %llu\n",
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btrfs_extent_refs(eb, ei), btrfs_extent_generation(eb, ei),
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flags);
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if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
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struct btrfs_tree_block_info *info;
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info = (struct btrfs_tree_block_info *)(ei + 1);
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btrfs_tree_block_key(eb, info, &key);
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printk(KERN_INFO "\t\ttree block key (%llu %u %llu) "
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"level %d\n",
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btrfs_disk_key_objectid(&key), key.type,
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btrfs_disk_key_offset(&key),
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btrfs_tree_block_level(eb, info));
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iref = (struct btrfs_extent_inline_ref *)(info + 1);
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} else {
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iref = (struct btrfs_extent_inline_ref *)(ei + 1);
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}
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ptr = (unsigned long)iref;
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end = (unsigned long)ei + item_size;
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while (ptr < end) {
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iref = (struct btrfs_extent_inline_ref *)ptr;
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type = btrfs_extent_inline_ref_type(eb, iref);
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offset = btrfs_extent_inline_ref_offset(eb, iref);
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switch (type) {
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case BTRFS_TREE_BLOCK_REF_KEY:
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printk(KERN_INFO "\t\ttree block backref "
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"root %llu\n", offset);
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break;
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case BTRFS_SHARED_BLOCK_REF_KEY:
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printk(KERN_INFO "\t\tshared block backref "
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"parent %llu\n", offset);
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break;
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case BTRFS_EXTENT_DATA_REF_KEY:
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dref = (struct btrfs_extent_data_ref *)(&iref->offset);
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print_extent_data_ref(eb, dref);
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break;
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case BTRFS_SHARED_DATA_REF_KEY:
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sref = (struct btrfs_shared_data_ref *)(iref + 1);
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printk(KERN_INFO "\t\tshared data backref "
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"parent %llu count %u\n",
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offset, btrfs_shared_data_ref_count(eb, sref));
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break;
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default:
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BUG();
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}
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ptr += btrfs_extent_inline_ref_size(type);
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}
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WARN_ON(ptr > end);
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}
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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static void print_extent_ref_v0(struct extent_buffer *eb, int slot)
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{
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struct btrfs_extent_ref_v0 *ref0;
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ref0 = btrfs_item_ptr(eb, slot, struct btrfs_extent_ref_v0);
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printk("\t\textent back ref root %llu gen %llu "
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"owner %llu num_refs %lu\n",
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btrfs_ref_root_v0(eb, ref0),
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btrfs_ref_generation_v0(eb, ref0),
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btrfs_ref_objectid_v0(eb, ref0),
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(unsigned long)btrfs_ref_count_v0(eb, ref0));
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}
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#endif
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static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
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u32 item_size)
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{
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if (!IS_ALIGNED(item_size, sizeof(u64))) {
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pr_warn("BTRFS: uuid item with illegal size %lu!\n",
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(unsigned long)item_size);
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return;
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}
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while (item_size) {
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__le64 subvol_id;
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read_extent_buffer(l, &subvol_id, offset, sizeof(subvol_id));
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printk(KERN_INFO "\t\tsubvol_id %llu\n",
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(unsigned long long)le64_to_cpu(subvol_id));
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item_size -= sizeof(u64);
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offset += sizeof(u64);
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}
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}
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void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
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{
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int i;
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u32 type, nr;
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struct btrfs_item *item;
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struct btrfs_root_item *ri;
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struct btrfs_dir_item *di;
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struct btrfs_inode_item *ii;
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struct btrfs_block_group_item *bi;
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struct btrfs_file_extent_item *fi;
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struct btrfs_extent_data_ref *dref;
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struct btrfs_shared_data_ref *sref;
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struct btrfs_dev_extent *dev_extent;
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struct btrfs_key key;
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struct btrfs_key found_key;
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if (!l)
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return;
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nr = btrfs_header_nritems(l);
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btrfs_info(root->fs_info, "leaf %llu total ptrs %d free space %d",
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btrfs_header_bytenr(l), nr, btrfs_leaf_free_space(root, l));
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for (i = 0 ; i < nr ; i++) {
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item = btrfs_item_nr(i);
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btrfs_item_key_to_cpu(l, &key, i);
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type = btrfs_key_type(&key);
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printk(KERN_INFO "\titem %d key (%llu %u %llu) itemoff %d "
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"itemsize %d\n",
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i, key.objectid, type, key.offset,
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btrfs_item_offset(l, item), btrfs_item_size(l, item));
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switch (type) {
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case BTRFS_INODE_ITEM_KEY:
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ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
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printk(KERN_INFO "\t\tinode generation %llu size %llu "
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"mode %o\n",
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btrfs_inode_generation(l, ii),
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btrfs_inode_size(l, ii),
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btrfs_inode_mode(l, ii));
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break;
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case BTRFS_DIR_ITEM_KEY:
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di = btrfs_item_ptr(l, i, struct btrfs_dir_item);
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btrfs_dir_item_key_to_cpu(l, di, &found_key);
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printk(KERN_INFO "\t\tdir oid %llu type %u\n",
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found_key.objectid,
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btrfs_dir_type(l, di));
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break;
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case BTRFS_ROOT_ITEM_KEY:
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ri = btrfs_item_ptr(l, i, struct btrfs_root_item);
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printk(KERN_INFO "\t\troot data bytenr %llu refs %u\n",
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btrfs_disk_root_bytenr(l, ri),
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btrfs_disk_root_refs(l, ri));
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break;
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case BTRFS_EXTENT_ITEM_KEY:
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print_extent_item(l, i);
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break;
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case BTRFS_TREE_BLOCK_REF_KEY:
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printk(KERN_INFO "\t\ttree block backref\n");
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break;
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case BTRFS_SHARED_BLOCK_REF_KEY:
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printk(KERN_INFO "\t\tshared block backref\n");
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break;
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case BTRFS_EXTENT_DATA_REF_KEY:
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dref = btrfs_item_ptr(l, i,
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struct btrfs_extent_data_ref);
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print_extent_data_ref(l, dref);
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break;
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case BTRFS_SHARED_DATA_REF_KEY:
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sref = btrfs_item_ptr(l, i,
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struct btrfs_shared_data_ref);
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printk(KERN_INFO "\t\tshared data backref count %u\n",
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btrfs_shared_data_ref_count(l, sref));
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break;
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case BTRFS_EXTENT_DATA_KEY:
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fi = btrfs_item_ptr(l, i,
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struct btrfs_file_extent_item);
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if (btrfs_file_extent_type(l, fi) ==
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BTRFS_FILE_EXTENT_INLINE) {
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printk(KERN_INFO "\t\tinline extent data "
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"size %u\n",
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btrfs_file_extent_inline_len(l, i, fi));
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break;
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}
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printk(KERN_INFO "\t\textent data disk bytenr %llu "
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"nr %llu\n",
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btrfs_file_extent_disk_bytenr(l, fi),
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btrfs_file_extent_disk_num_bytes(l, fi));
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printk(KERN_INFO "\t\textent data offset %llu "
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"nr %llu ram %llu\n",
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btrfs_file_extent_offset(l, fi),
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btrfs_file_extent_num_bytes(l, fi),
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btrfs_file_extent_ram_bytes(l, fi));
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break;
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case BTRFS_EXTENT_REF_V0_KEY:
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#ifdef BTRFS_COMPAT_EXTENT_TREE_V0
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print_extent_ref_v0(l, i);
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#else
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BUG();
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#endif
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break;
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case BTRFS_BLOCK_GROUP_ITEM_KEY:
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bi = btrfs_item_ptr(l, i,
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struct btrfs_block_group_item);
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printk(KERN_INFO "\t\tblock group used %llu\n",
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btrfs_disk_block_group_used(l, bi));
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break;
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case BTRFS_CHUNK_ITEM_KEY:
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print_chunk(l, btrfs_item_ptr(l, i,
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struct btrfs_chunk));
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break;
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case BTRFS_DEV_ITEM_KEY:
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print_dev_item(l, btrfs_item_ptr(l, i,
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struct btrfs_dev_item));
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break;
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case BTRFS_DEV_EXTENT_KEY:
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dev_extent = btrfs_item_ptr(l, i,
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struct btrfs_dev_extent);
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printk(KERN_INFO "\t\tdev extent chunk_tree %llu\n"
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"\t\tchunk objectid %llu chunk offset %llu "
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"length %llu\n",
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btrfs_dev_extent_chunk_tree(l, dev_extent),
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btrfs_dev_extent_chunk_objectid(l, dev_extent),
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btrfs_dev_extent_chunk_offset(l, dev_extent),
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btrfs_dev_extent_length(l, dev_extent));
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break;
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case BTRFS_DEV_STATS_KEY:
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printk(KERN_INFO "\t\tdevice stats\n");
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break;
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case BTRFS_DEV_REPLACE_KEY:
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printk(KERN_INFO "\t\tdev replace\n");
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break;
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case BTRFS_UUID_KEY_SUBVOL:
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case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
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print_uuid_item(l, btrfs_item_ptr_offset(l, i),
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btrfs_item_size_nr(l, i));
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break;
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};
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}
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}
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void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *c)
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{
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int i; u32 nr;
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struct btrfs_key key;
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int level;
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if (!c)
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return;
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nr = btrfs_header_nritems(c);
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level = btrfs_header_level(c);
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if (level == 0) {
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btrfs_print_leaf(root, c);
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return;
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}
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btrfs_info(root->fs_info, "node %llu level %d total ptrs %d free spc %u",
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btrfs_header_bytenr(c), level, nr,
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(u32)BTRFS_NODEPTRS_PER_BLOCK(root) - nr);
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for (i = 0; i < nr; i++) {
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btrfs_node_key_to_cpu(c, &key, i);
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printk(KERN_INFO "\tkey %d (%llu %u %llu) block %llu\n",
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i, key.objectid, key.type, key.offset,
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btrfs_node_blockptr(c, i));
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}
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for (i = 0; i < nr; i++) {
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struct extent_buffer *next = read_tree_block(root,
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btrfs_node_blockptr(c, i),
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btrfs_level_size(root, level - 1),
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btrfs_node_ptr_generation(c, i));
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if (btrfs_is_leaf(next) &&
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level != 1)
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BUG();
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if (btrfs_header_level(next) !=
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level - 1)
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BUG();
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btrfs_print_tree(root, next);
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free_extent_buffer(next);
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}
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}
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