• Miao Xie's avatar
    btrfs: fix wrong reservation when doing delayed inode operations · 19fd2949
    Miao Xie authored
    We have migrated the space for the delayed inode items from
    trans_block_rsv to global_block_rsv, but we forgot to set trans->block_rsv to
    global_block_rsv when we doing delayed inode operations, and the following Oops
    happened:
    
    [ 9792.654889] ------------[ cut here ]------------
    [ 9792.654898] WARNING: at fs/btrfs/extent-tree.c:5681
    btrfs_alloc_free_block+0xca/0x27c [btrfs]()
    [ 9792.654899] Hardware name: To Be Filled By O.E.M.
    [ 9792.654900] Modules linked in: btrfs zlib_deflate libcrc32c
    ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables
    arc4 rt61pci rt2x00pci rt2x00lib snd_hda_codec_hdmi mac80211
    snd_hda_codec_realtek cfg80211 snd_hda_intel edac_core snd_seq rfkill
    pcspkr serio_raw snd_hda_codec eeprom_93cx6 edac_mce_amd sp5100_tco
    i2c_piix4 k10temp snd_hwdep snd_seq_device snd_pcm floppy r8169 xhci_hcd
    mii snd_timer snd soundcore snd_page_alloc ipv6 firewire_ohci pata_acpi
    ata_generic firewire_core pata_via crc_itu_t radeon ttm drm_kms_helper
    drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
    [ 9792.654919] Pid: 2762, comm: rm Tainted: G        W   2.6.39+ #1
    [ 9792.654920] Call Trace:
    [ 9792.654922]  [<ffffffff81053c4a>] warn_slowpath_common+0x83/0x9b
    [ 9792.654925]  [<ffffffff81053c7c>] warn_slowpath_null+0x1a/0x1c
    [ 9792.654933]  [<ffffffffa038e747>] btrfs_alloc_free_block+0xca/0x27c [btrfs]
    [ 9792.654945]  [<ffffffffa03b8562>] ? map_extent_buffer+0x6e/0xa8 [btrfs]
    [ 9792.654953]  [<ffffffffa038189b>] __btrfs_cow_block+0xfc/0x30c [btrfs]
    [ 9792.654963]  [<ffffffffa0396aa6>] ? btrfs_buffer_uptodate+0x47/0x58 [btrfs]
    [ 9792.654970]  [<ffffffffa0382e48>] ? read_block_for_search+0x94/0x368 [btrfs]
    [ 9792.654978]  [<ffffffffa0381ba9>] btrfs_cow_block+0xfe/0x146 [btrfs]
    [ 9792.654986]  [<ffffffffa03848b0>] btrfs_search_slot+0x14d/0x4b6 [btrfs]
    [ 9792.654997]  [<ffffffffa03b8562>] ? map_extent_buffer+0x6e/0xa8 [btrfs]
    [ 9792.655022]  [<ffffffffa03938e8>] btrfs_lookup_inode+0x2f/0x8f [btrfs]
    [ 9792.655025]  [<ffffffff8147afac>] ? _cond_resched+0xe/0x22
    [ 9792.655027]  [<ffffffff8147b892>] ? mutex_lock+0x29/0x50
    [ 9792.655039]  [<ffffffffa03d41b1>] btrfs_update_delayed_inode+0x72/0x137 [btrfs]
    [ 9792.655051]  [<ffffffffa03d4ea2>] btrfs_run_delayed_items+0x90/0xdb [btrfs]
    [ 9792.655062]  [<ffffffffa039a69b>] btrfs_commit_transaction+0x228/0x654 [btrfs]
    [ 9792.655064]  [<ffffffff8106e8da>] ? remove_wait_queue+0x3a/0x3a
    [ 9792.655075]  [<ffffffffa03a2fa5>] btrfs_evict_inode+0x14d/0x202 [btrfs]
    [ 9792.655077]  [<ffffffff81132bd6>] evict+0x71/0x111
    [ 9792.655079]  [<ffffffff81132de0>] iput+0x12a/0x132
    [ 9792.655081]  [<ffffffff8112aa3a>] do_unlinkat+0x106/0x155
    [ 9792.655083]  [<ffffffff81127b83>] ? path_put+0x1f/0x23
    [ 9792.655085]  [<ffffffff8109c53c>] ? audit_syscall_entry+0x145/0x171
    [ 9792.655087]  [<ffffffff81128410>] ? putname+0x34/0x36
    [ 9792.655090]  [<ffffffff8112b441>] sys_unlinkat+0x29/0x2b
    [ 9792.655092]  [<ffffffff81482c42>] system_call_fastpath+0x16/0x1b
    [ 9792.655093] ---[ end trace 02b696eb02b3f768 ]---
    
    This patch fix it by setting the reservation of the transaction handle to the
    correct one.
    Reported-by: default avatarJosef Bacik <josef@redhat.com>
    Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
    Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    19fd2949
delayed-inode.h 4.19 KB