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aa66b0bb08
linux/fs/btrfs
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Kinglong Mee aa66b0bb08 btrfs: fix memory leak of fs_info in block group cache 
When starting up linux with btrfs filesystem, I got many memory leak
messages by kmemleak as,

unreferenced object 0xffff880066882000 (size 4096):
  comm "modprobe", pid 730, jiffies 4294690024 (age 196.599s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8174d52e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff811d09aa>] kmem_cache_alloc_trace+0xea/0x1e0
    [<ffffffffa03620fb>] btrfs_alloc_dummy_fs_info+0x6b/0x2a0 [btrfs]
    [<ffffffffa03624fc>] btrfs_alloc_dummy_block_group+0x5c/0x120 [btrfs]
    [<ffffffffa0360aa9>] btrfs_test_free_space_cache+0x39/0xed0 [btrfs]
    [<ffffffffa03b5a74>] trace_raw_output_xfs_attr_class+0x54/0xe0 [xfs]
    [<ffffffff81002122>] do_one_initcall+0xb2/0x1f0
    [<ffffffff811765aa>] do_init_module+0x5e/0x1e9
    [<ffffffff810fec09>] load_module+0x20a9/0x2690
    [<ffffffff810ff439>] SyS_finit_module+0xb9/0xf0
    [<ffffffff81757daf>] entry_SYSCALL_64_fastpath+0x12/0x76
    [<ffffffffffffffff>] 0xffffffffffffffff
unreferenced object 0xffff8800573f8000 (size 10256):
  comm "modprobe", pid 730, jiffies 4294690185 (age 196.460s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff8174d52e>] kmemleak_alloc+0x4e/0xb0
    [<ffffffff8119ca6e>] kmalloc_order+0x5e/0x70
    [<ffffffff8119caa4>] kmalloc_order_trace+0x24/0x90
    [<ffffffffa03620b3>] btrfs_alloc_dummy_fs_info+0x23/0x2a0 [btrfs]
    [<ffffffffa03624fc>] btrfs_alloc_dummy_block_group+0x5c/0x120 [btrfs]
    [<ffffffffa036603d>] run_test+0xfd/0x320 [btrfs]
    [<ffffffffa0366f34>] btrfs_test_free_space_tree+0x94/0xee [btrfs]
    [<ffffffffa03b5aab>] trace_raw_output_xfs_attr_class+0x8b/0xe0 [xfs]
    [<ffffffff81002122>] do_one_initcall+0xb2/0x1f0
    [<ffffffff811765aa>] do_init_module+0x5e/0x1e9
    [<ffffffff810fec09>] load_module+0x20a9/0x2690
    [<ffffffff810ff439>] SyS_finit_module+0xb9/0xf0
    [<ffffffff81757daf>] entry_SYSCALL_64_fastpath+0x12/0x76
    [<ffffffffffffffff>] 0xffffffffffffffff

This patch lets btrfs using fs_info stored in btrfs_root for
block group cache directly without allocating a new one.

Fixes: d0bd456074 ("Btrfs: add fragment=* debug mount option")
Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2016-02-18 13:28:24 +01:00
..
tests btrfs: fix memory leak of fs_info in block group cache 2016-02-18 13:28:24 +01:00
acl.c Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2016-01-18 12:44:40 -08:00
async-thread.c btrfs: async-thread: Fix a use-after-free error for trace 2016-01-25 16:50:26 -08:00
async-thread.h btrfs: async_thread: Fix workqueue 'max_active' value when initializing 2015-08-31 11:46:40 -07:00
backref.c btrfs: fix iterator with update error in backref.c 2016-01-15 19:27:18 +01:00
backref.h btrfs: cleanup, remove inode_item_info helper 2015-01-14 19:23:47 +01:00
btrfs_inode.h btrfs: put delayed item hook into inode 2016-01-07 14:26:58 +01:00
check-integrity.c btrfs: use list_for_each_entry* in check-integrity.c 2016-01-07 14:38:42 +01:00
check-integrity.h
compression.c Merge branch 'akpm' (patches from Andrew) 2015-11-07 14:32:45 -08:00
compression.h btrfs: constify structs with op functions or static definitions 2015-02-16 18:48:44 +01:00
ctree.c Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
ctree.h Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2016-01-22 11:49:21 -08:00
delayed-inode.c btrfs: zero out delayed node upon allocation 2016-01-07 14:30:17 +01:00
delayed-inode.h
delayed-ref.c btrfs: better packing of btrfs_delayed_extent_op 2016-01-07 14:26:58 +01:00
delayed-ref.h btrfs: better packing of btrfs_delayed_extent_op 2016-01-07 14:26:58 +01:00
dev-replace.c btrfs: cleanup, stop casting for extent_map->lookup everywhere 2016-01-15 19:22:28 +01:00
dev-replace.h
dir-item.c Btrfs: make xattr replace operations atomic 2014-11-20 17:20:07 -08:00
disk-io.c Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2016-01-29 15:46:49 -08:00
disk-io.h Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
export.c BTRFS: support NFSv2 export 2015-10-06 06:55:23 -07:00
export.h
extent_io.c Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
extent_io.h Merge branch 'freespace-4.5' into for-linus-4.5 2015-12-23 13:29:09 -08:00
extent_map.c btrfs: cleanup, stop casting for extent_map->lookup everywhere 2016-01-15 19:22:28 +01:00
extent_map.h btrfs: cleanup, stop casting for extent_map->lookup everywhere 2016-01-15 19:22:28 +01:00
extent-tree.c btrfs: Fix no_space in write and rm loop 2016-01-20 07:22:14 -08:00
file-item.c btrfs: cleanup, use enum values for btrfs_path reada 2016-01-07 15:01:15 +01:00
file.c btrfs: Continue write in case of can_not_nocow 2016-02-18 13:18:06 +01:00
free-space-cache.c Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
free-space-cache.h btrfs: constify remaining structs with function pointers 2016-01-07 15:01:14 +01:00
free-space-tree.c Revert "btrfs: synchronize incompat feature bits with sysfs files" 2016-01-29 08:19:37 -08:00
free-space-tree.h Btrfs: implement the free space B-tree 2015-12-17 12:16:47 -08:00
hash.c btrfs: LLVMLinux: Remove VLAIS 2014-10-14 10:51:22 +02:00
hash.h
inode-item.c Btrfs: consolidate btrfs_error() to btrfs_std_error() 2015-09-29 16:30:00 +02:00
inode-map.c Merge branch 'misc-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-19 18:21:30 -08:00
inode-map.h Btrfs: Initialize btrfs_root->highest_objectid when loading tree root and subvolume roots 2016-01-15 19:25:02 +01:00
inode.c Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2016-01-29 15:46:49 -08:00
ioctl.c Revert "btrfs: synchronize incompat feature bits with sysfs files" 2016-01-29 08:19:37 -08:00
Kconfig rcu: Make SRCU optional by using CONFIG_SRCU 2015-01-06 11:04:29 -08:00
locking.c btrfs: cleanup, remove stray return statements 2016-01-07 14:30:52 +01:00
locking.h btrfs: fix lockups from btrfs_clear_path_blocking 2014-11-19 10:34:35 -08:00
lzo.c btrfs: constify structs with op functions or static definitions 2015-02-16 18:48:44 +01:00
Makefile Btrfs: add free space tree sanity tests 2015-12-17 12:16:47 -08:00
math.h btrfs: cleanup 64bit/32bit divs, compile time constants 2015-03-03 17:23:57 +01:00
ordered-data.c Btrfs: change how we wait for pending ordered extents 2015-10-21 18:51:40 -07:00
ordered-data.h Btrfs: change how we wait for pending ordered extents 2015-10-21 18:51:40 -07:00
orphan.c btrfs: kill the key type accessor helpers 2014-09-17 13:37:12 -07:00
print-tree.c btrfs: remove parameter blocksize from read_tree_block 2014-10-02 17:14:50 +02:00
print-tree.h
props.c btrfs: cleanup iterating over prop_handlers array 2015-10-21 18:28:48 +02:00
props.h
qgroup.c btrfs: qgroup: account shared subtree during snapshot delete 2015-11-25 05:27:33 -08:00
qgroup.h btrfs: qgroup: Check if qgroup reserved space leaked 2015-10-21 18:41:10 -07:00
raid56.c btrfs: raid56: Use raid_write_end_io for scrub 2016-01-20 07:22:18 -08:00
raid56.h Btrfs: add RAID 5/6 BTRFS_RBIO_REBUILD_MISSING operation 2015-08-09 07:34:26 -07:00
rcu-string.h
reada.c btrfs: reada: Fix returned errno code 2015-10-21 18:29:50 +02:00
relocation.c Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2016-01-29 15:46:49 -08:00
root-tree.c Merge branch 'cleanups/for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.4 2015-10-21 18:21:40 -07:00
scrub.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
send.c Btrfs: send, don't BUG_ON() when an empty symlink is found 2015-12-31 18:08:20 +00:00
send.h Btrfs: use linux/sizes.h to represent constants 2016-01-07 14:38:02 +01:00
struct-funcs.c
super.c Revert "btrfs: synchronize incompat feature bits with sysfs files" 2016-01-29 08:19:37 -08:00
sysfs.c btrfs: sysfs: check initialization state before updating features 2016-01-27 05:40:10 -08:00
sysfs.h btrfs: sysfs: introduce helper for syncing bits with sysfs files 2016-01-21 18:50:40 +01:00
transaction.c Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
transaction.h btrfs: preallocate path for snapshot creation at ioctl time 2016-01-07 15:20:55 +01:00
tree-defrag.c Btrfs: fix locking bugs when defragging leaves 2015-12-18 02:51:32 +00:00
tree-log.c Btrfs: fix race between fsync and lockless direct IO writes 2016-01-25 16:50:26 -08:00
tree-log.h Btrfs: fix metadata inconsistencies after directory fsync 2015-03-26 17:56:23 -07:00
ulist.c btrfs: ulist: Add ulist_del() function. 2015-06-10 09:26:17 -07:00
ulist.h btrfs: ulist: Add ulist_del() function. 2015-06-10 09:26:17 -07:00
uuid-tree.c Btrfs: make btrfs_search_forward return with nodes unlocked 2014-09-17 13:38:02 -07:00
volumes.c Revert "btrfs: synchronize incompat feature bits with sysfs files" 2016-01-29 08:19:37 -08:00
volumes.h Merge branch 'misc-cleanups-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.5 2016-01-11 06:08:37 -08:00
xattr.c wrappers for ->i_mutex access 2016-01-22 18:04:28 -05:00
xattr.h btrfs: Use xattr handler infrastructure 2015-12-06 21:34:14 -05:00
zlib.c btrfs: constify structs with op functions or static definitions 2015-02-16 18:48:44 +01:00