diff options
| author | Bob Peterson <rpeterso@redhat.com> | 2019-02-12 13:43:55 -0700 |
|---|---|---|
| committer | Bob Peterson <rpeterso@redhat.com> | 2020-02-10 07:39:47 -0600 |
| commit | 69511080bd6efd34f4e020fcde6cf73bb4a61af6 (patch) | |
| tree | 28db914524c033ac6ac0366cdb571f5765ab4c0a /fs/gfs2/util.h | |
| parent | 8e28ef1f2fa176854f96fb0416f2aaf5516793d0 (diff) | |
| download | linux-69511080bd6efd34f4e020fcde6cf73bb4a61af6.tar.bz2 | |
gfs2: Introduce concept of a pending withdraw
File system withdraws can be delayed when inconsistencies are
discovered when we cannot withdraw immediately, for example, when
critical spin_locks are held. But delaying the withdraw can cause
gfs2 to ignore the error and keep running for a short period of time.
For example, an rgrp glock may be dequeued and demoted while there
are still buffers that haven't been properly revoked, due to io
errors writing to the journal.
This patch introduces a new concept of a pending withdraw, which
means an inconsistency has been discovered and we need to withdraw
at the earliest possible opportunity. In these cases, we aren't
quite withdrawn yet, but we still need to not dequeue glocks and
other critical things. If we dequeue the glocks and the withdraw
results in our journal being replayed, the replay could overwrite
data that's been modified by a different node that acquired the
glock in the meantime.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2/util.h')
| -rw-r--r-- | fs/gfs2/util.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h index 572399e75ce6..16b2cc6c4560 100644 --- a/fs/gfs2/util.h +++ b/fs/gfs2/util.h @@ -173,12 +173,22 @@ static inline unsigned int gfs2_tune_get_i(struct gfs2_tune *gt, } /** + * gfs2_withdraw_delayed - withdraw as soon as possible without deadlocks + * @sdp: the superblock + */ +static inline void gfs2_withdraw_delayed(struct gfs2_sbd *sdp) +{ + set_bit(SDF_WITHDRAWING, &sdp->sd_flags); +} + +/** * gfs2_withdrawn - test whether the file system is withdrawing or withdrawn * @sdp: the superblock */ static inline bool gfs2_withdrawn(struct gfs2_sbd *sdp) { - return test_bit(SDF_WITHDRAWN, &sdp->sd_flags); + return test_bit(SDF_WITHDRAWN, &sdp->sd_flags) || + test_bit(SDF_WITHDRAWING, &sdp->sd_flags); } #define gfs2_tune_get(sdp, field) \ |