diff options
Diffstat (limited to 'fs/xfs/scrub/common.c')
| -rw-r--r-- | fs/xfs/scrub/common.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index 2a496d1699a3..87649facbbde 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -487,6 +487,8 @@ xchk_perag_drain_and_lock( sa->agi_bp = NULL; } + if (!(sc->flags & XCHK_FSGATES_DRAIN)) + return -EDEADLOCK; error = xfs_perag_intent_drain(sa->pag); if (error == -ERESTARTSYS) error = -EINTR; @@ -1005,3 +1007,25 @@ xchk_start_reaping( } sc->flags &= ~XCHK_REAPING_DISABLED; } + +/* + * Enable filesystem hooks (i.e. runtime code patching) before starting a scrub + * operation. Callers must not hold any locks that intersect with the CPU + * hotplug lock (e.g. writeback locks) because code patching must halt the CPUs + * to change kernel code. + */ +void +xchk_fsgates_enable( + struct xfs_scrub *sc, + unsigned int scrub_fsgates) +{ + ASSERT(!(scrub_fsgates & ~XCHK_FSGATES_ALL)); + ASSERT(!(sc->flags & scrub_fsgates)); + + trace_xchk_fsgates_enable(sc, scrub_fsgates); + + if (scrub_fsgates & XCHK_FSGATES_DRAIN) + xfs_drain_wait_enable(); + + sc->flags |= scrub_fsgates; +} |