[v3,0/5] rewrite error handling during mounting stage

Message

[e-mail] April 24, 2022, 1:09 p.m. UTC

Note:
For test code & test result, please check my next patch. 

** v3 **

patch 1/5 
in fs/ocfs2/journal.h, add declaration for ocfs2_journal_alloc()
in ocfs2_journal_init(), add BUG_ON()
in ocfs2_initialize_super()
- change the "if()" condition for return value of ocfs2_journal_alloc
- remove unused variable 'journal', which introduced from v1 patch but
  became unused from v2 after new api ocfs2_journal_alloc().

patch 4/5
- Under review comment, roll back the changes [*] for ocfs2_check_volume().
- add ocfs2_free_slot_info() in label out_system_inodes. without call this
  function, ocfs2 will trigger crash. this crash triggered by my test
  patch.

[*]: new comment at front of function, and a code rule fix

** v2 **

patch 1/5:
 - change patch subject.
 - add a new function ocfs2_journal_alloc
 - add new comment at front of ocfs2_journal_alloc
 - in ocfs2_initialize_super, change legacy comment before calling
   ocfs2_journal_alloc.

patch 2/5:
 - revise commit log according review comment.
 - remove meanless comment of ocfs2_resmap_init in header file.

patch 3/5:
 - set "sb->s_fs_info = NULL" (osb is NULL) when ocfs2_initialize_super
   fails.

patch 4/5:
 for ocfs2_mount_volume():
 - make it return 0 (before return "status") as successful.
 - remove goto label "out_journal_shutdown"
 - add more clean job in label "out_system_inodes"
   - add ocfs2_shutdown_local_alloc() to release local alloc resources.
   - add ocfs2_journal_shutdown() to clean up journal.

 for ocfs2_check_volume():
 - add new comment at the front of ocfs2_check_volume.
 - change comment style/format for "struct ocfs2_dinode *local_alloc"

patch 5/5:
 revise commit log.

 in ocfs2_fill_super():
 - change goto label "out_journal" to "out_dismount"
 - add "goto out" in label "out_dismount".

** draft -> v1 ** 

- split one patch into 5 patches.
- goto labal name change to out_xxx style.
- only test for mount/umount & 0001-xx.patch related issue.

Heming Zhao (5):
  ocfs2: fix mounting crash if journal is not alloced
  ocfs2: change return type of ocfs2_resmap_init
  ocfs2: ocfs2_initialize_super does cleanup job before return error
  ocfs2: ocfs2_mount_volume does cleanup job before return error
  ocfs2: rewrite error handling of ocfs2_fill_super

 fs/ocfs2/inode.c        |   4 +-
 fs/ocfs2/journal.c      |  33 +++++---
 fs/ocfs2/journal.h      |   2 +
 fs/ocfs2/reservations.c |   4 +-
 fs/ocfs2/reservations.h |   9 +-
 fs/ocfs2/super.c        | 178 ++++++++++++++++++++++++----------------
 6 files changed, 139 insertions(+), 91 deletions(-)