diff options
| author | Alexander Aring <aahringo@redhat.com> | 2023-03-06 15:48:18 -0500 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2023-03-06 15:49:07 -0600 |
| commit | 1361737f102d898330fd61efa5940c1ee0812da1 (patch) | |
| tree | ca5f173e986ffe666e333e2c1ff25abd3928d227 /fs/dlm/dlm_internal.h | |
| parent | 46d6e722d8b1cf07d21662f6b29bcd8e72f77305 (diff) | |
| download | linux-1361737f102d898330fd61efa5940c1ee0812da1.tar.gz | |
fs: dlm: switch lkb_sbflags to atomic ops
This patch moves lkb_sbflags handling to atomic bits ops. This should
prepare for a possible manipulating of lkb_sbflags flags at the same
time by concurrent execution.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/dlm_internal.h')
| -rw-r--r-- | fs/dlm/dlm_internal.h | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h index e2925f554bc77..986a9d7b1f332 100644 --- a/fs/dlm/dlm_internal.h +++ b/fs/dlm/dlm_internal.h @@ -235,7 +235,7 @@ struct dlm_lkb { uint32_t lkb_id; /* our lock ID */ uint32_t lkb_remid; /* lock ID on remote partner */ uint32_t lkb_exflags; /* external flags from caller */ - uint32_t lkb_sbflags; /* lksb flags */ + unsigned long lkb_sbflags; /* lksb flags */ unsigned long lkb_dflags; /* distributed flags */ unsigned long lkb_iflags; /* internal flags */ uint32_t lkb_lvbseq; /* lvb sequence number */ @@ -760,6 +760,26 @@ static inline uint32_t dlm_dflags_val(const struct dlm_lkb *lkb) __DLM_DFL_MAX_BIT); } +/* coming from UAPI header + * + * TODO: + * Move this to UAPI header and let other values point to them and use BIT() + */ +#define DLM_SBF_DEMOTED_BIT 0 +#define __DLM_SBF_MIN_BIT DLM_SBF_DEMOTED_BIT +#define DLM_SBF_VALNOTVALID_BIT 1 +#define DLM_SBF_ALTMODE_BIT 2 +#define __DLM_SBF_MAX_BIT DLM_SBF_ALTMODE_BIT + +static inline uint32_t dlm_sbflags_val(const struct dlm_lkb *lkb) +{ + /* be sure the next person updates this */ + BUILD_BUG_ON(BIT(__DLM_SBF_MAX_BIT) != DLM_SBF_ALTMODE); + + return dlm_flags_val(&lkb->lkb_sbflags, __DLM_SBF_MIN_BIT, + __DLM_SBF_MAX_BIT); +} + static inline void dlm_set_flags_val(unsigned long *addr, uint32_t val, uint32_t min, uint32_t max) { @@ -779,6 +799,12 @@ static inline void dlm_set_dflags_val(struct dlm_lkb *lkb, uint32_t val) __DLM_DFL_MAX_BIT); } +static inline void dlm_set_sbflags_val(struct dlm_lkb *lkb, uint32_t val) +{ + dlm_set_flags_val(&lkb->lkb_sbflags, val, __DLM_SBF_MIN_BIT, + __DLM_SBF_MAX_BIT); +} + int dlm_plock_init(void); void dlm_plock_exit(void); |