linux/fs/nfs_common
Mike Snitzer bc29408695 nfs_common: fix localio to cope with racing nfs_local_probe()
Fix the possibility of racing nfs_local_probe() resulting in:
  list_add double add: new=ffff8b99707f9f58, prev=ffff8b99707f9f58, next=ffffffffc0f30000.
  ------------[ cut here ]------------
  kernel BUG at lib/list_debug.c:35!

Add nfs_uuid_init() to properly initialize all nfs_uuid_t members
(particularly its list_head).

Switch to returning bool from nfs_uuid_begin(), returns false if
nfs_uuid_t is already in-use (its list_head is on a list). Update
nfs_local_probe() to return early if the nfs_client's cl_uuid
(nfs_uuid_t) is in-use.

Also, switch nfs_uuid_begin() from using list_add_tail_rcu() to
list_add_tail() -- rculist was used in an earlier version of the
localio code that had a lockless nfs_uuid_lookup interface.

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
2024-11-04 10:24:19 -05:00
..
common.c nfs_common: factor out nfs4_errtbl and nfs4_stat_to_errno 2024-09-23 15:03:29 -04:00
grace.c fs: nfs: add missing MODULE_DESCRIPTION() macros 2024-07-08 13:47:24 -04:00
Makefile nfs_common: add NFS LOCALIO auxiliary protocol enablement 2024-09-23 15:03:30 -04:00
nfs_ssc.c NFSv4.2: remove MODULE_LICENSE in non-modules 2023-04-13 13:13:52 -07:00
nfsacl.c fs: nfs: add missing MODULE_DESCRIPTION() macros 2024-07-08 13:47:24 -04:00
nfslocalio.c nfs_common: fix localio to cope with racing nfs_local_probe() 2024-11-04 10:24:19 -05:00