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-rw-r--r--fs/gfs2/glock.c35
-rw-r--r--fs/gfs2/incore.h1
-rw-r--r--fs/gfs2/locking/dlm/lock.c3
-rw-r--r--fs/gfs2/locking/dlm/thread.c10
-rw-r--r--fs/gfs2/ops_fstype.c2
-rw-r--r--include/linux/lm_interface.h10
6 files changed, 44 insertions, 17 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 63981e2fb83..d636b3e80f5 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -764,7 +764,7 @@ static void state_change(struct gfs2_glock *gl, unsigned int new_state)
static void drop_bh(struct gfs2_glock *gl, unsigned int ret)
{
struct gfs2_sbd *sdp = gl->gl_sbd;
- const struct gfs2_glock_operations *glops = gl->gl_ops;
+ struct gfs2_holder *gh = gl->gl_req_gh;
gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags));
gfs2_assert_warn(sdp, list_empty(&gl->gl_holders));
@@ -772,8 +772,14 @@ static void drop_bh(struct gfs2_glock *gl, unsigned int ret)
state_change(gl, LM_ST_UNLOCKED);
- if (glops->go_inval)
- glops->go_inval(gl, DIO_METADATA);
+ if (test_and_clear_bit(GLF_CONV_DEADLK, &gl->gl_flags)) {
+ spin_lock(&gl->gl_spin);
+ gh->gh_error = 0;
+ spin_unlock(&gl->gl_spin);
+ gfs2_glock_xmote_th(gl, gl->gl_req_gh);
+ gfs2_glock_put(gl);
+ return;
+ }
spin_lock(&gl->gl_spin);
gfs2_demote_wake(gl);
@@ -794,7 +800,6 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret)
struct gfs2_sbd *sdp = gl->gl_sbd;
const struct gfs2_glock_operations *glops = gl->gl_ops;
struct gfs2_holder *gh = gl->gl_req_gh;
- int prev_state = gl->gl_state;
int op_done = 1;
if (!gh && (ret & LM_OUT_ST_MASK) == LM_ST_UNLOCKED) {
@@ -808,16 +813,6 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret)
state_change(gl, ret & LM_OUT_ST_MASK);
- if (prev_state != LM_ST_UNLOCKED && !(ret & LM_OUT_CACHEABLE)) {
- if (glops->go_inval)
- glops->go_inval(gl, DIO_METADATA);
- } else if (gl->gl_state == LM_ST_DEFERRED) {
- /* We might not want to do this here.
- Look at moving to the inode glops. */
- if (glops->go_inval)
- glops->go_inval(gl, 0);
- }
-
/* Deal with each possible exit condition */
if (!gh) {
@@ -837,6 +832,14 @@ static void xmote_bh(struct gfs2_glock *gl, unsigned int ret)
}
} else {
spin_lock(&gl->gl_spin);
+ if (ret & LM_OUT_CONV_DEADLK) {
+ gh->gh_error = 0;
+ set_bit(GLF_CONV_DEADLK, &gl->gl_flags);
+ spin_unlock(&gl->gl_spin);
+ gfs2_glock_drop_th(gl);
+ gfs2_glock_put(gl);
+ return;
+ }
list_del_init(&gh->gh_list);
gh->gh_error = -EIO;
if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
@@ -910,6 +913,8 @@ static void gfs2_glock_xmote_th(struct gfs2_glock *gl, struct gfs2_holder *gh)
if (glops->go_xmote_th)
glops->go_xmote_th(gl);
+ if (state == LM_ST_DEFERRED && glops->go_inval)
+ glops->go_inval(gl, DIO_METADATA);
gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags));
gfs2_assert_warn(sdp, list_empty(&gl->gl_holders));
@@ -952,6 +957,8 @@ static void gfs2_glock_drop_th(struct gfs2_glock *gl)
if (glops->go_xmote_th)
glops->go_xmote_th(gl);
+ if (glops->go_inval)
+ glops->go_inval(gl, DIO_METADATA);
gfs2_assert_warn(sdp, test_bit(GLF_LOCK, &gl->gl_flags));
gfs2_assert_warn(sdp, list_empty(&gl->gl_holders));
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 4ba2ea63119..9c2c0b90b22 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -167,6 +167,7 @@ enum {
GLF_DEMOTE_IN_PROGRESS = 6,
GLF_LFLUSH = 7,
GLF_WAITERS2 = 8,
+ GLF_CONV_DEADLK = 9,
};
struct gfs2_glock {
diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
index 542a797ac89..53a6ab3c091 100644
--- a/fs/gfs2/locking/dlm/lock.c
+++ b/fs/gfs2/locking/dlm/lock.c
@@ -137,7 +137,8 @@ static inline unsigned int make_flags(struct gdlm_lock *lp,
/* Conversion deadlock avoidance by DLM */
- if (!test_bit(LFL_FORCE_PROMOTE, &lp->flags) &&
+ if (!(lp->ls->fsflags & LM_MFLAG_CONV_NODROP) &&
+ !test_bit(LFL_FORCE_PROMOTE, &lp->flags) &&
!(lkf & DLM_LKF_NOQUEUE) &&
cur > DLM_LOCK_NL && req > DLM_LOCK_NL && cur != req)
lkf |= DLM_LKF_CONVDEADLK;
diff --git a/fs/gfs2/locking/dlm/thread.c b/fs/gfs2/locking/dlm/thread.c
index 521694fc19d..e53db6fd28a 100644
--- a/fs/gfs2/locking/dlm/thread.c
+++ b/fs/gfs2/locking/dlm/thread.c
@@ -135,7 +135,15 @@ static void process_complete(struct gdlm_lock *lp)
lp->lksb.sb_status, lp->lockname.ln_type,
(unsigned long long)lp->lockname.ln_number,
lp->flags);
- return;
+ if (lp->lksb.sb_status == -EDEADLOCK &&
+ lp->ls->fsflags & LM_MFLAG_CONV_NODROP) {
+ lp->req = lp->cur;
+ acb.lc_ret |= LM_OUT_CONV_DEADLK;
+ if (lp->cur == DLM_LOCK_IV)
+ lp->lksb.sb_lkid = 0;
+ goto out;
+ } else
+ return;
}
/*
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 5b518f73497..ef9c6c4f80f 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -723,7 +723,7 @@ static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
{
char *proto = sdp->sd_proto_name;
char *table = sdp->sd_table_name;
- int flags = 0;
+ int flags = LM_MFLAG_CONV_NODROP;
int error;
if (sdp->sd_args.ar_spectator)
diff --git a/include/linux/lm_interface.h b/include/linux/lm_interface.h
index 1418fdc9ac0..f274997bc28 100644
--- a/include/linux/lm_interface.h
+++ b/include/linux/lm_interface.h
@@ -21,9 +21,15 @@ typedef void (*lm_callback_t) (void *ptr, unsigned int type, void *data);
* modify the filesystem. The lock module shouldn't assign a journal to the FS
* mount. It shouldn't send recovery callbacks to the FS mount. If the node
* dies or withdraws, all locks can be wiped immediately.
+ *
+ * LM_MFLAG_CONV_NODROP
+ * Do not allow the dlm to internally resolve conversion deadlocks by demoting
+ * the lock to unlocked and then reacquiring it in the requested mode. Instead,
+ * it should cancel the request and return LM_OUT_CONV_DEADLK.
*/
#define LM_MFLAG_SPECTATOR 0x00000001
+#define LM_MFLAG_CONV_NODROP 0x00000002
/*
* lm_lockstruct flags
@@ -110,6 +116,9 @@ typedef void (*lm_callback_t) (void *ptr, unsigned int type, void *data);
*
* LM_OUT_ASYNC
* The result of the request will be returned in an LM_CB_ASYNC callback.
+ *
+ * LM_OUT_CONV_DEADLK
+ * The lock request was canceled do to a conversion deadlock.
*/
#define LM_OUT_ST_MASK 0x00000003
@@ -117,6 +126,7 @@ typedef void (*lm_callback_t) (void *ptr, unsigned int type, void *data);
#define LM_OUT_CANCELED 0x00000008
#define LM_OUT_ASYNC 0x00000080
#define LM_OUT_ERROR 0x00000100
+#define LM_OUT_CONV_DEADLK 0x00000200
/*
* lm_callback_t types
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-20 17:51:32 +0000