fs/ocfs2/suballoc.c:2430:2-8: preceding lock on line 2413

From: kernel test robot
Date: Fri Aug 14 2020 - 02:35:08 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: e764a1e32337aaf325fc5b14a5bbd06eabba4699
commit: 464170647b5648bb81f3615567485fcb9a685bed jbd2: Make state lock a spinlock
date: 10 months ago
config: x86_64-randconfig-c002-20200812 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>


coccinelle warnings: (new ones prefixed by >>)

>> fs/ocfs2/suballoc.c:2430:2-8: preceding lock on line 2413

vim +2430 fs/ocfs2/suballoc.c

415cb800375cc4 Mark Fasheh 2007-09-16 2379
b4414eea0e7b9c Mark Fasheh 2010-03-11 2380 static int ocfs2_block_group_clear_bits(handle_t *handle,
ccd979bdbce9fb Mark Fasheh 2005-12-15 2381 struct inode *alloc_inode,
ccd979bdbce9fb Mark Fasheh 2005-12-15 2382 struct ocfs2_group_desc *bg,
ccd979bdbce9fb Mark Fasheh 2005-12-15 2383 struct buffer_head *group_bh,
ccd979bdbce9fb Mark Fasheh 2005-12-15 2384 unsigned int bit_off,
b4414eea0e7b9c Mark Fasheh 2010-03-11 2385 unsigned int num_bits,
b4414eea0e7b9c Mark Fasheh 2010-03-11 2386 void (*undo_fn)(unsigned int bit,
b4414eea0e7b9c Mark Fasheh 2010-03-11 2387 unsigned long *bmap))
ccd979bdbce9fb Mark Fasheh 2005-12-15 2388 {
ccd979bdbce9fb Mark Fasheh 2005-12-15 2389 int status;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2390 unsigned int tmp;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2391 struct ocfs2_group_desc *undo_bg = NULL;
464170647b5648 Thomas Gleixner 2019-08-09 2392 struct journal_head *jh;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2393
42035306132802 Joel Becker 2008-11-13 2394 /* The caller got this descriptor from
42035306132802 Joel Becker 2008-11-13 2395 * ocfs2_read_group_descriptor(). Any corruption is a code bug. */
42035306132802 Joel Becker 2008-11-13 2396 BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg));
ccd979bdbce9fb Mark Fasheh 2005-12-15 2397
2f73e135b83c50 Tao Ma 2011-02-22 2398 trace_ocfs2_block_group_clear_bits(bit_off, num_bits);
ccd979bdbce9fb Mark Fasheh 2005-12-15 2399
b4414eea0e7b9c Mark Fasheh 2010-03-11 2400 BUG_ON(undo_fn && !ocfs2_is_cluster_bitmap(alloc_inode));
0cf2f7632b1789 Joel Becker 2009-02-12 2401 status = ocfs2_journal_access_gd(handle, INODE_CACHE(alloc_inode),
b4414eea0e7b9c Mark Fasheh 2010-03-11 2402 group_bh,
b4414eea0e7b9c Mark Fasheh 2010-03-11 2403 undo_fn ?
b4414eea0e7b9c Mark Fasheh 2010-03-11 2404 OCFS2_JOURNAL_ACCESS_UNDO :
b4414eea0e7b9c Mark Fasheh 2010-03-11 2405 OCFS2_JOURNAL_ACCESS_WRITE);
ccd979bdbce9fb Mark Fasheh 2005-12-15 2406 if (status < 0) {
ccd979bdbce9fb Mark Fasheh 2005-12-15 2407 mlog_errno(status);
ccd979bdbce9fb Mark Fasheh 2005-12-15 2408 goto bail;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2409 }
ccd979bdbce9fb Mark Fasheh 2005-12-15 2410
464170647b5648 Thomas Gleixner 2019-08-09 2411 jh = bh2jh(group_bh);
b4414eea0e7b9c Mark Fasheh 2010-03-11 2412 if (undo_fn) {
464170647b5648 Thomas Gleixner 2019-08-09 @2413 spin_lock(&jh->b_state_lock);
464170647b5648 Thomas Gleixner 2019-08-09 2414 undo_bg = (struct ocfs2_group_desc *) jh->b_committed_data;
94e41ecfe0f202 Sunil Mushran 2009-06-19 2415 BUG_ON(!undo_bg);
94e41ecfe0f202 Sunil Mushran 2009-06-19 2416 }
ccd979bdbce9fb Mark Fasheh 2005-12-15 2417
ccd979bdbce9fb Mark Fasheh 2005-12-15 2418 tmp = num_bits;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2419 while(tmp--) {
ccd979bdbce9fb Mark Fasheh 2005-12-15 2420 ocfs2_clear_bit((bit_off + tmp),
ccd979bdbce9fb Mark Fasheh 2005-12-15 2421 (unsigned long *) bg->bg_bitmap);
b4414eea0e7b9c Mark Fasheh 2010-03-11 2422 if (undo_fn)
b4414eea0e7b9c Mark Fasheh 2010-03-11 2423 undo_fn(bit_off + tmp,
ccd979bdbce9fb Mark Fasheh 2005-12-15 2424 (unsigned long *) undo_bg->bg_bitmap);
ccd979bdbce9fb Mark Fasheh 2005-12-15 2425 }
ccd979bdbce9fb Mark Fasheh 2005-12-15 2426 le16_add_cpu(&bg->bg_free_bits_count, num_bits);
9b5cd10e4c14a1 Srinivas Eeda 2010-10-05 2427 if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) {
e75ed71be4f2f7 Changwei Ge 2018-01-31 2428 if (undo_fn)
464170647b5648 Thomas Gleixner 2019-08-09 2429 spin_unlock(&jh->b_state_lock);
7ecef14ab1db96 Joe Perches 2015-09-04 @2430 return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n",
9b5cd10e4c14a1 Srinivas Eeda 2010-10-05 2431 (unsigned long long)le64_to_cpu(bg->bg_blkno),
9b5cd10e4c14a1 Srinivas Eeda 2010-10-05 2432 le16_to_cpu(bg->bg_bits),
7ecef14ab1db96 Joe Perches 2015-09-04 2433 le16_to_cpu(bg->bg_free_bits_count),
7ecef14ab1db96 Joe Perches 2015-09-04 2434 num_bits);
9b5cd10e4c14a1 Srinivas Eeda 2010-10-05 2435 }
ccd979bdbce9fb Mark Fasheh 2005-12-15 2436
b4414eea0e7b9c Mark Fasheh 2010-03-11 2437 if (undo_fn)
464170647b5648 Thomas Gleixner 2019-08-09 2438 spin_unlock(&jh->b_state_lock);
94e41ecfe0f202 Sunil Mushran 2009-06-19 2439
ec20cec7a35158 Joel Becker 2010-03-19 2440 ocfs2_journal_dirty(handle, group_bh);
ccd979bdbce9fb Mark Fasheh 2005-12-15 2441 bail:
ccd979bdbce9fb Mark Fasheh 2005-12-15 2442 return status;
ccd979bdbce9fb Mark Fasheh 2005-12-15 2443 }
ccd979bdbce9fb Mark Fasheh 2005-12-15 2444

:::::: The code at line 2430 was first introduced by commit
:::::: 7ecef14ab1db961545354fa443749aeda2ea1b75 ocfs2: neaten do_error, ocfs2_error and ocfs2_abort

:::::: TO: Joe Perches <joe@xxxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>

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