1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
26fd058f7STheodore Ts'o /*
36fd058f7STheodore Ts'o * linux/fs/ext4/block_validity.c
46fd058f7STheodore Ts'o *
56fd058f7STheodore Ts'o * Copyright (C) 2009
66fd058f7STheodore Ts'o * Theodore Ts'o (tytso@mit.edu)
76fd058f7STheodore Ts'o *
86fd058f7STheodore Ts'o * Track which blocks in the filesystem are metadata blocks that
96fd058f7STheodore Ts'o * should never be used as data blocks by files or directories.
106fd058f7STheodore Ts'o */
116fd058f7STheodore Ts'o
126fd058f7STheodore Ts'o #include <linux/time.h>
136fd058f7STheodore Ts'o #include <linux/fs.h>
146fd058f7STheodore Ts'o #include <linux/namei.h>
156fd058f7STheodore Ts'o #include <linux/quotaops.h>
166fd058f7STheodore Ts'o #include <linux/buffer_head.h>
176fd058f7STheodore Ts'o #include <linux/swap.h>
186fd058f7STheodore Ts'o #include <linux/pagemap.h>
196fd058f7STheodore Ts'o #include <linux/blkdev.h>
205a0e3ad6STejun Heo #include <linux/slab.h>
216fd058f7STheodore Ts'o #include "ext4.h"
226fd058f7STheodore Ts'o
236fd058f7STheodore Ts'o struct ext4_system_zone {
246fd058f7STheodore Ts'o struct rb_node node;
256fd058f7STheodore Ts'o ext4_fsblk_t start_blk;
266fd058f7STheodore Ts'o unsigned int count;
27ce9f24ccSJan Kara u32 ino;
286fd058f7STheodore Ts'o };
296fd058f7STheodore Ts'o
306fd058f7STheodore Ts'o static struct kmem_cache *ext4_system_zone_cachep;
316fd058f7STheodore Ts'o
ext4_init_system_zone(void)325dabfc78STheodore Ts'o int __init ext4_init_system_zone(void)
336fd058f7STheodore Ts'o {
3416828088STheodore Ts'o ext4_system_zone_cachep = KMEM_CACHE(ext4_system_zone, 0);
356fd058f7STheodore Ts'o if (ext4_system_zone_cachep == NULL)
366fd058f7STheodore Ts'o return -ENOMEM;
376fd058f7STheodore Ts'o return 0;
386fd058f7STheodore Ts'o }
396fd058f7STheodore Ts'o
ext4_exit_system_zone(void)405dabfc78STheodore Ts'o void ext4_exit_system_zone(void)
416fd058f7STheodore Ts'o {
427727ae52Szhangyi (F) rcu_barrier();
436fd058f7STheodore Ts'o kmem_cache_destroy(ext4_system_zone_cachep);
446fd058f7STheodore Ts'o }
456fd058f7STheodore Ts'o
can_merge(struct ext4_system_zone * entry1,struct ext4_system_zone * entry2)466fd058f7STheodore Ts'o static inline int can_merge(struct ext4_system_zone *entry1,
476fd058f7STheodore Ts'o struct ext4_system_zone *entry2)
486fd058f7STheodore Ts'o {
49ce9f24ccSJan Kara if ((entry1->start_blk + entry1->count) == entry2->start_blk &&
50ce9f24ccSJan Kara entry1->ino == entry2->ino)
516fd058f7STheodore Ts'o return 1;
526fd058f7STheodore Ts'o return 0;
536fd058f7STheodore Ts'o }
546fd058f7STheodore Ts'o
release_system_zone(struct ext4_system_blocks * system_blks)557727ae52Szhangyi (F) static void release_system_zone(struct ext4_system_blocks *system_blks)
567727ae52Szhangyi (F) {
577727ae52Szhangyi (F) struct ext4_system_zone *entry, *n;
587727ae52Szhangyi (F)
597727ae52Szhangyi (F) rbtree_postorder_for_each_entry_safe(entry, n,
607727ae52Szhangyi (F) &system_blks->root, node)
617727ae52Szhangyi (F) kmem_cache_free(ext4_system_zone_cachep, entry);
627727ae52Szhangyi (F) }
637727ae52Szhangyi (F)
646fd058f7STheodore Ts'o /*
656fd058f7STheodore Ts'o * Mark a range of blocks as belonging to the "system zone" --- that
666fd058f7STheodore Ts'o * is, filesystem metadata blocks which should never be used by
676fd058f7STheodore Ts'o * inodes.
686fd058f7STheodore Ts'o */
add_system_zone(struct ext4_system_blocks * system_blks,ext4_fsblk_t start_blk,unsigned int count,u32 ino)697727ae52Szhangyi (F) static int add_system_zone(struct ext4_system_blocks *system_blks,
706fd058f7STheodore Ts'o ext4_fsblk_t start_blk,
71ce9f24ccSJan Kara unsigned int count, u32 ino)
726fd058f7STheodore Ts'o {
73bf9a379dSJan Kara struct ext4_system_zone *new_entry, *entry;
747727ae52Szhangyi (F) struct rb_node **n = &system_blks->root.rb_node, *node;
75*57802c73SLi zeming struct rb_node *parent = NULL, *new_node;
766fd058f7STheodore Ts'o
776fd058f7STheodore Ts'o while (*n) {
786fd058f7STheodore Ts'o parent = *n;
796fd058f7STheodore Ts'o entry = rb_entry(parent, struct ext4_system_zone, node);
806fd058f7STheodore Ts'o if (start_blk < entry->start_blk)
816fd058f7STheodore Ts'o n = &(*n)->rb_left;
826fd058f7STheodore Ts'o else if (start_blk >= (entry->start_blk + entry->count))
836fd058f7STheodore Ts'o n = &(*n)->rb_right;
84bf9a379dSJan Kara else /* Unexpected overlap of system zones. */
85bf9a379dSJan Kara return -EFSCORRUPTED;
866fd058f7STheodore Ts'o }
876fd058f7STheodore Ts'o
886fd058f7STheodore Ts'o new_entry = kmem_cache_alloc(ext4_system_zone_cachep,
896fd058f7STheodore Ts'o GFP_KERNEL);
906fd058f7STheodore Ts'o if (!new_entry)
916fd058f7STheodore Ts'o return -ENOMEM;
926fd058f7STheodore Ts'o new_entry->start_blk = start_blk;
936fd058f7STheodore Ts'o new_entry->count = count;
94ce9f24ccSJan Kara new_entry->ino = ino;
956fd058f7STheodore Ts'o new_node = &new_entry->node;
966fd058f7STheodore Ts'o
976fd058f7STheodore Ts'o rb_link_node(new_node, parent, n);
987727ae52Szhangyi (F) rb_insert_color(new_node, &system_blks->root);
996fd058f7STheodore Ts'o
1006fd058f7STheodore Ts'o /* Can we merge to the left? */
1016fd058f7STheodore Ts'o node = rb_prev(new_node);
1026fd058f7STheodore Ts'o if (node) {
1036fd058f7STheodore Ts'o entry = rb_entry(node, struct ext4_system_zone, node);
1046fd058f7STheodore Ts'o if (can_merge(entry, new_entry)) {
1056fd058f7STheodore Ts'o new_entry->start_blk = entry->start_blk;
1066fd058f7STheodore Ts'o new_entry->count += entry->count;
1077727ae52Szhangyi (F) rb_erase(node, &system_blks->root);
1086fd058f7STheodore Ts'o kmem_cache_free(ext4_system_zone_cachep, entry);
1096fd058f7STheodore Ts'o }
1106fd058f7STheodore Ts'o }
1116fd058f7STheodore Ts'o
1126fd058f7STheodore Ts'o /* Can we merge to the right? */
1136fd058f7STheodore Ts'o node = rb_next(new_node);
1146fd058f7STheodore Ts'o if (node) {
1156fd058f7STheodore Ts'o entry = rb_entry(node, struct ext4_system_zone, node);
1166fd058f7STheodore Ts'o if (can_merge(new_entry, entry)) {
1176fd058f7STheodore Ts'o new_entry->count += entry->count;
1187727ae52Szhangyi (F) rb_erase(node, &system_blks->root);
1196fd058f7STheodore Ts'o kmem_cache_free(ext4_system_zone_cachep, entry);
1206fd058f7STheodore Ts'o }
1216fd058f7STheodore Ts'o }
1226fd058f7STheodore Ts'o return 0;
1236fd058f7STheodore Ts'o }
1246fd058f7STheodore Ts'o
debug_print_tree(struct ext4_sb_info * sbi)1256fd058f7STheodore Ts'o static void debug_print_tree(struct ext4_sb_info *sbi)
1266fd058f7STheodore Ts'o {
1276fd058f7STheodore Ts'o struct rb_node *node;
1286fd058f7STheodore Ts'o struct ext4_system_zone *entry;
12969000d82SPhong Tran struct ext4_system_blocks *system_blks;
1306fd058f7STheodore Ts'o int first = 1;
1316fd058f7STheodore Ts'o
1326fd058f7STheodore Ts'o printk(KERN_INFO "System zones: ");
13369000d82SPhong Tran rcu_read_lock();
134dd0db94fSChunguang Xu system_blks = rcu_dereference(sbi->s_system_blks);
13569000d82SPhong Tran node = rb_first(&system_blks->root);
1366fd058f7STheodore Ts'o while (node) {
1376fd058f7STheodore Ts'o entry = rb_entry(node, struct ext4_system_zone, node);
138d74f3d25SJoe Perches printk(KERN_CONT "%s%llu-%llu", first ? "" : ", ",
1396fd058f7STheodore Ts'o entry->start_blk, entry->start_blk + entry->count - 1);
1406fd058f7STheodore Ts'o first = 0;
1416fd058f7STheodore Ts'o node = rb_next(node);
1426fd058f7STheodore Ts'o }
14369000d82SPhong Tran rcu_read_unlock();
144d74f3d25SJoe Perches printk(KERN_CONT "\n");
1456fd058f7STheodore Ts'o }
1466fd058f7STheodore Ts'o
ext4_protect_reserved_inode(struct super_block * sb,struct ext4_system_blocks * system_blks,u32 ino)1477727ae52Szhangyi (F) static int ext4_protect_reserved_inode(struct super_block *sb,
1487727ae52Szhangyi (F) struct ext4_system_blocks *system_blks,
1497727ae52Szhangyi (F) u32 ino)
150345c0dbfSTheodore Ts'o {
151345c0dbfSTheodore Ts'o struct inode *inode;
152345c0dbfSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb);
153345c0dbfSTheodore Ts'o struct ext4_map_blocks map;
154fbbbbd2fSColin Ian King u32 i = 0, num;
155fbbbbd2fSColin Ian King int err = 0, n;
156345c0dbfSTheodore Ts'o
157345c0dbfSTheodore Ts'o if ((ino < EXT4_ROOT_INO) ||
158345c0dbfSTheodore Ts'o (ino > le32_to_cpu(sbi->s_es->s_inodes_count)))
159345c0dbfSTheodore Ts'o return -EINVAL;
160345c0dbfSTheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_SPECIAL);
161345c0dbfSTheodore Ts'o if (IS_ERR(inode))
162345c0dbfSTheodore Ts'o return PTR_ERR(inode);
163345c0dbfSTheodore Ts'o num = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
164345c0dbfSTheodore Ts'o while (i < num) {
165af133adeSShijie Luo cond_resched();
166345c0dbfSTheodore Ts'o map.m_lblk = i;
167345c0dbfSTheodore Ts'o map.m_len = num - i;
168345c0dbfSTheodore Ts'o n = ext4_map_blocks(NULL, inode, &map, 0);
169345c0dbfSTheodore Ts'o if (n < 0) {
170345c0dbfSTheodore Ts'o err = n;
171345c0dbfSTheodore Ts'o break;
172345c0dbfSTheodore Ts'o }
173345c0dbfSTheodore Ts'o if (n == 0) {
174345c0dbfSTheodore Ts'o i++;
175345c0dbfSTheodore Ts'o } else {
176ce9f24ccSJan Kara err = add_system_zone(system_blks, map.m_pblk, n, ino);
177ce9f24ccSJan Kara if (err < 0) {
178ce9f24ccSJan Kara if (err == -EFSCORRUPTED) {
17993c20bc3SJan Kara EXT4_ERROR_INODE_ERR(inode, -err,
18093c20bc3SJan Kara "blocks %llu-%llu from inode overlap system zone",
18154d3adbcSTheodore Ts'o map.m_pblk,
18293c20bc3SJan Kara map.m_pblk + map.m_len - 1);
183ce9f24ccSJan Kara }
184345c0dbfSTheodore Ts'o break;
185345c0dbfSTheodore Ts'o }
186345c0dbfSTheodore Ts'o i += n;
187345c0dbfSTheodore Ts'o }
188345c0dbfSTheodore Ts'o }
189345c0dbfSTheodore Ts'o iput(inode);
190345c0dbfSTheodore Ts'o return err;
191345c0dbfSTheodore Ts'o }
192345c0dbfSTheodore Ts'o
ext4_destroy_system_zone(struct rcu_head * rcu)1937727ae52Szhangyi (F) static void ext4_destroy_system_zone(struct rcu_head *rcu)
1947727ae52Szhangyi (F) {
1957727ae52Szhangyi (F) struct ext4_system_blocks *system_blks;
1967727ae52Szhangyi (F)
1977727ae52Szhangyi (F) system_blks = container_of(rcu, struct ext4_system_blocks, rcu);
1987727ae52Szhangyi (F) release_system_zone(system_blks);
1997727ae52Szhangyi (F) kfree(system_blks);
2007727ae52Szhangyi (F) }
2017727ae52Szhangyi (F)
2027727ae52Szhangyi (F) /*
2037727ae52Szhangyi (F) * Build system zone rbtree which is used for block validity checking.
2047727ae52Szhangyi (F) *
2057727ae52Szhangyi (F) * The update of system_blks pointer in this function is protected by
2067727ae52Szhangyi (F) * sb->s_umount semaphore. However we have to be careful as we can be
2078041ac64SChunguang Xu * racing with ext4_inode_block_valid() calls reading system_blks rbtree
2087727ae52Szhangyi (F) * protected only by RCU. That's why we first build the rbtree and then
2097727ae52Szhangyi (F) * swap it in place.
2107727ae52Szhangyi (F) */
ext4_setup_system_zone(struct super_block * sb)2116fd058f7STheodore Ts'o int ext4_setup_system_zone(struct super_block *sb)
2126fd058f7STheodore Ts'o {
2136fd058f7STheodore Ts'o ext4_group_t ngroups = ext4_get_groups_count(sb);
2146fd058f7STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb);
2157727ae52Szhangyi (F) struct ext4_system_blocks *system_blks;
2166fd058f7STheodore Ts'o struct ext4_group_desc *gdp;
2176fd058f7STheodore Ts'o ext4_group_t i;
2186fd058f7STheodore Ts'o int ret;
2196fd058f7STheodore Ts'o
2207727ae52Szhangyi (F) system_blks = kzalloc(sizeof(*system_blks), GFP_KERNEL);
2217727ae52Szhangyi (F) if (!system_blks)
2227727ae52Szhangyi (F) return -ENOMEM;
2237727ae52Szhangyi (F)
2246fd058f7STheodore Ts'o for (i=0; i < ngroups; i++) {
22568228da5SWang Jianjian unsigned int meta_blks = ext4_num_base_meta_blocks(sb, i);
22668228da5SWang Jianjian
2274b99faa2SKhazhismel Kumykov cond_resched();
22868228da5SWang Jianjian if (meta_blks != 0) {
229e7bfb5c9SJan Kara ret = add_system_zone(system_blks,
2307727ae52Szhangyi (F) ext4_group_first_block_no(sb, i),
23168228da5SWang Jianjian meta_blks, 0);
232e7bfb5c9SJan Kara if (ret)
233e7bfb5c9SJan Kara goto err;
234e7bfb5c9SJan Kara }
2356fd058f7STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL);
2367727ae52Szhangyi (F) ret = add_system_zone(system_blks,
237ce9f24ccSJan Kara ext4_block_bitmap(sb, gdp), 1, 0);
2386fd058f7STheodore Ts'o if (ret)
2397727ae52Szhangyi (F) goto err;
2407727ae52Szhangyi (F) ret = add_system_zone(system_blks,
241ce9f24ccSJan Kara ext4_inode_bitmap(sb, gdp), 1, 0);
2426fd058f7STheodore Ts'o if (ret)
2437727ae52Szhangyi (F) goto err;
2447727ae52Szhangyi (F) ret = add_system_zone(system_blks,
2457727ae52Szhangyi (F) ext4_inode_table(sb, gdp),
246ce9f24ccSJan Kara sbi->s_itb_per_group, 0);
2476fd058f7STheodore Ts'o if (ret)
2487727ae52Szhangyi (F) goto err;
2496fd058f7STheodore Ts'o }
250345c0dbfSTheodore Ts'o if (ext4_has_feature_journal(sb) && sbi->s_es->s_journal_inum) {
2517727ae52Szhangyi (F) ret = ext4_protect_reserved_inode(sb, system_blks,
252345c0dbfSTheodore Ts'o le32_to_cpu(sbi->s_es->s_journal_inum));
253345c0dbfSTheodore Ts'o if (ret)
2547727ae52Szhangyi (F) goto err;
255345c0dbfSTheodore Ts'o }
2566fd058f7STheodore Ts'o
2577727ae52Szhangyi (F) /*
2587727ae52Szhangyi (F) * System blks rbtree complete, announce it once to prevent racing
2598041ac64SChunguang Xu * with ext4_inode_block_valid() accessing the rbtree at the same
2607727ae52Szhangyi (F) * time.
2617727ae52Szhangyi (F) */
262dd0db94fSChunguang Xu rcu_assign_pointer(sbi->s_system_blks, system_blks);
2637727ae52Szhangyi (F)
2646fd058f7STheodore Ts'o if (test_opt(sb, DEBUG))
26549598e04SJun Piao debug_print_tree(sbi);
2666fd058f7STheodore Ts'o return 0;
2677727ae52Szhangyi (F) err:
2687727ae52Szhangyi (F) release_system_zone(system_blks);
2697727ae52Szhangyi (F) kfree(system_blks);
2707727ae52Szhangyi (F) return ret;
2716fd058f7STheodore Ts'o }
2726fd058f7STheodore Ts'o
2736fd058f7STheodore Ts'o /*
2747727ae52Szhangyi (F) * Called when the filesystem is unmounted or when remounting it with
2757727ae52Szhangyi (F) * noblock_validity specified.
2767727ae52Szhangyi (F) *
2777727ae52Szhangyi (F) * The update of system_blks pointer in this function is protected by
2787727ae52Szhangyi (F) * sb->s_umount semaphore. However we have to be careful as we can be
2798041ac64SChunguang Xu * racing with ext4_inode_block_valid() calls reading system_blks rbtree
2807727ae52Szhangyi (F) * protected only by RCU. So we first clear the system_blks pointer and
2817727ae52Szhangyi (F) * then free the rbtree only after RCU grace period expires.
2826fd058f7STheodore Ts'o */
ext4_release_system_zone(struct super_block * sb)2837727ae52Szhangyi (F) void ext4_release_system_zone(struct super_block *sb)
2847727ae52Szhangyi (F) {
2857727ae52Szhangyi (F) struct ext4_system_blocks *system_blks;
2867727ae52Szhangyi (F)
287dd0db94fSChunguang Xu system_blks = rcu_dereference_protected(EXT4_SB(sb)->s_system_blks,
2887727ae52Szhangyi (F) lockdep_is_held(&sb->s_umount));
289dd0db94fSChunguang Xu rcu_assign_pointer(EXT4_SB(sb)->s_system_blks, NULL);
2907727ae52Szhangyi (F)
2917727ae52Szhangyi (F) if (system_blks)
2927727ae52Szhangyi (F) call_rcu(&system_blks->rcu, ext4_destroy_system_zone);
2937727ae52Szhangyi (F) }
2947727ae52Szhangyi (F)
ext4_sb_block_valid(struct super_block * sb,struct inode * inode,ext4_fsblk_t start_blk,unsigned int count)2956bc6c2bdSRitesh Harjani int ext4_sb_block_valid(struct super_block *sb, struct inode *inode,
2966bc6c2bdSRitesh Harjani ext4_fsblk_t start_blk, unsigned int count)
2976fd058f7STheodore Ts'o {
2986bc6c2bdSRitesh Harjani struct ext4_sb_info *sbi = EXT4_SB(sb);
2997727ae52Szhangyi (F) struct ext4_system_blocks *system_blks;
3003f67e7cfSJan Kara struct ext4_system_zone *entry;
3013f67e7cfSJan Kara struct rb_node *n;
3023f67e7cfSJan Kara int ret = 1;
3033f67e7cfSJan Kara
3043f67e7cfSJan Kara if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
3053f67e7cfSJan Kara (start_blk + count < start_blk) ||
3063f67e7cfSJan Kara (start_blk + count > ext4_blocks_count(sbi->s_es)))
3073f67e7cfSJan Kara return 0;
3086fd058f7STheodore Ts'o
3097727ae52Szhangyi (F) /*
3107727ae52Szhangyi (F) * Lock the system zone to prevent it being released concurrently
3117727ae52Szhangyi (F) * when doing a remount which inverse current "[no]block_validity"
3127727ae52Szhangyi (F) * mount option.
3137727ae52Szhangyi (F) */
3147727ae52Szhangyi (F) rcu_read_lock();
315dd0db94fSChunguang Xu system_blks = rcu_dereference(sbi->s_system_blks);
3163f67e7cfSJan Kara if (system_blks == NULL)
3173f67e7cfSJan Kara goto out_rcu;
3183f67e7cfSJan Kara
3193f67e7cfSJan Kara n = system_blks->root.rb_node;
3203f67e7cfSJan Kara while (n) {
3213f67e7cfSJan Kara entry = rb_entry(n, struct ext4_system_zone, node);
3223f67e7cfSJan Kara if (start_blk + count - 1 < entry->start_blk)
3233f67e7cfSJan Kara n = n->rb_left;
3243f67e7cfSJan Kara else if (start_blk >= (entry->start_blk + entry->count))
3253f67e7cfSJan Kara n = n->rb_right;
3263f67e7cfSJan Kara else {
3276bc6c2bdSRitesh Harjani ret = 0;
3286bc6c2bdSRitesh Harjani if (inode)
3293f67e7cfSJan Kara ret = (entry->ino == inode->i_ino);
3303f67e7cfSJan Kara break;
3313f67e7cfSJan Kara }
3323f67e7cfSJan Kara }
3333f67e7cfSJan Kara out_rcu:
3347727ae52Szhangyi (F) rcu_read_unlock();
3357727ae52Szhangyi (F) return ret;
3366fd058f7STheodore Ts'o }
3376fd058f7STheodore Ts'o
3386bc6c2bdSRitesh Harjani /*
3396bc6c2bdSRitesh Harjani * Returns 1 if the passed-in block region (start_blk,
3406bc6c2bdSRitesh Harjani * start_blk+count) is valid; 0 if some part of the block region
3416bc6c2bdSRitesh Harjani * overlaps with some other filesystem metadata blocks.
3426bc6c2bdSRitesh Harjani */
ext4_inode_block_valid(struct inode * inode,ext4_fsblk_t start_blk,unsigned int count)3436bc6c2bdSRitesh Harjani int ext4_inode_block_valid(struct inode *inode, ext4_fsblk_t start_blk,
3446bc6c2bdSRitesh Harjani unsigned int count)
3456bc6c2bdSRitesh Harjani {
3466bc6c2bdSRitesh Harjani return ext4_sb_block_valid(inode->i_sb, inode, start_blk, count);
3476bc6c2bdSRitesh Harjani }
3486bc6c2bdSRitesh Harjani
ext4_check_blockref(const char * function,unsigned int line,struct inode * inode,__le32 * p,unsigned int max)3491f7d1e77STheodore Ts'o int ext4_check_blockref(const char *function, unsigned int line,
3501f7d1e77STheodore Ts'o struct inode *inode, __le32 *p, unsigned int max)
3511f7d1e77STheodore Ts'o {
3521f7d1e77STheodore Ts'o __le32 *bref = p;
3531f7d1e77STheodore Ts'o unsigned int blk;
3541f7d1e77STheodore Ts'o
355170417c8STheodore Ts'o if (ext4_has_feature_journal(inode->i_sb) &&
356170417c8STheodore Ts'o (inode->i_ino ==
357170417c8STheodore Ts'o le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
358170417c8STheodore Ts'o return 0;
359170417c8STheodore Ts'o
3601f7d1e77STheodore Ts'o while (bref < p+max) {
3611f7d1e77STheodore Ts'o blk = le32_to_cpu(*bref++);
3621f7d1e77STheodore Ts'o if (blk &&
363ce9f24ccSJan Kara unlikely(!ext4_inode_block_valid(inode, blk, 1))) {
3641f7d1e77STheodore Ts'o ext4_error_inode(inode, function, line, blk,
3651f7d1e77STheodore Ts'o "invalid block");
3666a797d27SDarrick J. Wong return -EFSCORRUPTED;
3671f7d1e77STheodore Ts'o }
3681f7d1e77STheodore Ts'o }
3691f7d1e77STheodore Ts'o return 0;
3701f7d1e77STheodore Ts'o }
371dae1e52cSAmir Goldstein
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