kernel - Hosts the 0x221E linux distro kernel.

Hosts the 0x221E linux distro kernel.

Ubuntu

path: root/include/linux/ceph/string_table.h

Age	Commit message (Expand)	Author
2017-11-02	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	Greg Kroah-Hartman
2016-07-28	libceph: introduce reference counted string	Yan, Zheng

d>Liu Song At the beginning, nblocks has been assigned. There is no need to repeat the assignment in the while loop, and remove it. Signed-off-by: Liu Song <liu.song11@zte.com.cn> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz> 2019-01-31jbd2: fix deadlock while checkpoint thread waits commit thread to finishXiaoguang Wang This issue was found when I tried to put checkpoint work in a separate thread, the deadlock below happened: Thread1 | Thread2 __jbd2_log_wait_for_space | jbd2_log_do_checkpoint (hold j_checkpoint_mutex)| if (jh->b_transaction != NULL) | ... | jbd2_log_start_commit(journal, tid); |jbd2_update_log_tail | will lock j_checkpoint_mutex, | but will be blocked here. | jbd2_log_wait_commit(journal, tid); | wait_event(journal->j_wait_done_commit, | !tid_gt(tid, journal->j_commit_sequence)); | ... |wake_up(j_wait_done_commit) } | then deadlock occurs, Thread1 will never be waken up. To fix this issue, drop j_checkpoint_mutex in jbd2_log_do_checkpoint() when we are going to wait for transaction commit. Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> 2018-10-05jbd2: fix use after free in jbd2_log_do_checkpoint()Jan Kara The code cleaning transaction's lists of checkpoint buffers has a bug where it increases bh refcount only after releasing journal->j_list_lock. Thus the following race is possible: CPU0 CPU1 jbd2_log_do_checkpoint() jbd2_journal_try_to_free_buffers() __journal_try_to_free_buffer(bh) ... while (transaction->t_checkpoint_io_list) ... if (buffer_locked(bh)) { <-- IO completes now, buffer gets unlocked --> spin_unlock(&journal->j_list_lock); spin_lock(&journal->j_list_lock); __jbd2_journal_remove_checkpoint(jh); spin_unlock(&journal->j_list_lock); try_to_free_buffers(page); get_bh(bh) <-- accesses freed bh Fix the problem by grabbing bh reference before unlocking journal->j_list_lock. Fixes: dc6e8d669cf5 ("jbd2: don't call get_bh() before calling __jbd2_journal_remove_checkpoint()") Fixes: be1158cc615f ("jbd2: fold __process_buffer() into jbd2_log_do_checkpoint()") Reported-by: syzbot+7f4a27091759e2fe7453@syzkaller.appspotmail.com CC: stable@vger.kernel.org Reviewed-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu> 2017-12-17ext4: fix up remaining files with SPDX cleanupsTheodore Ts'o A number of ext4 source files were skipped due because their copyright permission statements didn't match the expected text used by the automated conversion utilities. I've added SPDX tags for the rest. While looking at some of these files, I've noticed that we have quite a bit of variation on the licenses that were used --- in particular some of the Red Hat licenses on the jbd2 files use a GPL2+ license, and we have some files that have a LGPL-2.1 license (which was quite surprising). I've not attempted to do any license changes. Even if it is perfectly legal to relicense to GPL 2.0-only for consistency's sake, that should be done with ext4 developer community discussion. Signed-off-by: Theodore Ts'o <tytso@mit.edu>