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authorSteven Whitehouse <swhiteho@redhat.com>2008-05-21 17:03:22 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2008-06-27 09:39:22 +0100
commit6802e3400ff4549525930ee744030c36fce9cc73 (patch)
treedb889bf5337c1d3bb12ebbf571c3c1cad1040496 /fs/gfs2/incore.h
parent543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff)
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[GFS2] Clean up the glock core
This patch implements a number of cleanups to the core of the GFS2 glock code. As a result a lot of code is removed. It looks like a really big change, but actually a large part of this patch is either removing or moving existing code. There are some new bits too though, such as the new run_queue() function which is considerably streamlined. Highlights of this patch include: o Fixes a cluster coherency bug during SH -> EX lock conversions o Removes the "glmutex" code in favour of a single bit lock o Removes the ->go_xmote_bh() for inodes since it was duplicating ->go_lock() o We now only use the ->lm_lock() function for both locks and unlocks (i.e. unlock is a lock with target mode LM_ST_UNLOCKED) o The fast path is considerably shortly, giving performance gains especially with lock_nolock o The glock_workqueue is now used for all the callbacks from the DLM which allows us to simplify the lock_dlm module (see following patch) o The way is now open to make further changes such as eliminating the two threads (gfs2_glockd and gfs2_scand) in favour of a more efficient scheme. This patch has undergone extensive testing with various test suites so it should be pretty stable by now. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Bob Peterson <rpeterso@redhat.com>
Diffstat (limited to 'fs/gfs2/incore.h')
-rw-r--r--fs/gfs2/incore.h35
1 files changed, 15 insertions, 20 deletions
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index eabe5ea..4b734c6 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -128,20 +128,20 @@ struct gfs2_bufdata {
struct gfs2_glock_operations {
void (*go_xmote_th) (struct gfs2_glock *gl);
- void (*go_xmote_bh) (struct gfs2_glock *gl);
+ int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);
void (*go_inval) (struct gfs2_glock *gl, int flags);
int (*go_demote_ok) (struct gfs2_glock *gl);
int (*go_lock) (struct gfs2_holder *gh);
void (*go_unlock) (struct gfs2_holder *gh);
+ int (*go_dump)(struct seq_file *seq, const struct gfs2_glock *gl);
const int go_type;
const unsigned long go_min_hold_time;
};
enum {
/* States */
- HIF_HOLDER = 6,
+ HIF_HOLDER = 6, /* Set for gh that "holds" the glock */
HIF_FIRST = 7,
- HIF_ABORTED = 9,
HIF_WAIT = 10,
};
@@ -154,20 +154,20 @@ struct gfs2_holder {
unsigned gh_flags;
int gh_error;
- unsigned long gh_iflags;
+ unsigned long gh_iflags; /* HIF_... */
unsigned long gh_ip;
};
enum {
- GLF_LOCK = 1,
- GLF_STICKY = 2,
- GLF_DEMOTE = 3,
- GLF_PENDING_DEMOTE = 4,
- GLF_DIRTY = 5,
- GLF_DEMOTE_IN_PROGRESS = 6,
- GLF_LFLUSH = 7,
- GLF_WAITERS2 = 8,
- GLF_CONV_DEADLK = 9,
+ GLF_LOCK = 1,
+ GLF_STICKY = 2,
+ GLF_DEMOTE = 3,
+ GLF_PENDING_DEMOTE = 4,
+ GLF_DEMOTE_IN_PROGRESS = 5,
+ GLF_DIRTY = 6,
+ GLF_LFLUSH = 7,
+ GLF_INVALIDATE_IN_PROGRESS = 8,
+ GLF_REPLY_PENDING = 9,
};
struct gfs2_glock {
@@ -179,19 +179,14 @@ struct gfs2_glock {
spinlock_t gl_spin;
unsigned int gl_state;
+ unsigned int gl_target;
+ unsigned int gl_reply;
unsigned int gl_hash;
unsigned int gl_demote_state; /* state requested by remote node */
unsigned long gl_demote_time; /* time of first demote request */
- struct pid *gl_owner_pid;
- unsigned long gl_ip;
struct list_head gl_holders;
- struct list_head gl_waiters1; /* HIF_MUTEX */
- struct list_head gl_waiters3; /* HIF_PROMOTE */
const struct gfs2_glock_operations *gl_ops;
-
- struct gfs2_holder *gl_req_gh;
-
void *gl_lock;
char *gl_lvb;
atomic_t gl_lvb_count;