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gfs2: Add GLF_PENDING_REPLY flag

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Introduce a new GLF_PENDING_REPLY flag to indicate that a reply from DLM
is expected.  Include that flag in glock dumps to show more clearly
what's going on.  (When the GLF_PENDING_REPLY flag is set, the GLF_LOCK
flag will also be set but the GLF_LOCK flag alone isn't sufficient to
tell that we are waiting for a DLM reply.)

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2025-01-24 17:23:50 +01:00
parent 5788253392
commit 8bbfde0875
3 changed files with 7 additions and 0 deletions
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5
fs/gfs2/glock.c
View File

@ -807,6 +807,7 @@ __acquires(&gl->gl_lockref.lock)
}
if (ls->ls_ops->lm_lock) {
set_bit(GLF_PENDING_REPLY, &gl->gl_flags);
spin_unlock(&gl->gl_lockref.lock);
ret = ls->ls_ops->lm_lock(gl, target, lck_flags);
spin_lock(&gl->gl_lockref.lock);
@ -825,6 +826,7 @@ __acquires(&gl->gl_lockref.lock)
/* The operation will be completed asynchronously. */
return;
}
clear_bit(GLF_PENDING_REPLY, &gl->gl_flags);
}
/* Complete the operation now. */
@ -1923,6 +1925,7 @@ void gfs2_glock_complete(struct gfs2_glock *gl, int ret)
struct lm_lockstruct *ls = &gl->gl_name.ln_sbd->sd_lockstruct;
spin_lock(&gl->gl_lockref.lock);
clear_bit(GLF_PENDING_REPLY, &gl->gl_flags);
gl->gl_reply = ret;
if (unlikely(test_bit(DFL_BLOCK_LOCKS, &ls->ls_recover_flags))) {
@ -2323,6 +2326,8 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl)
*p++ = 'f';
if (test_bit(GLF_INVALIDATE_IN_PROGRESS, gflags))
*p++ = 'i';
if (test_bit(GLF_PENDING_REPLY, gflags))
*p++ = 'R';
if (test_bit(GLF_HAVE_REPLY, gflags))
*p++ = 'r';
if (test_bit(GLF_INITIAL, gflags))

1
fs/gfs2/incore.h
View File

@ -330,6 +330,7 @@ enum {
GLF_UNLOCKED = 16, /* Wait for glock to be unlocked */
GLF_TRY_TO_EVICT = 17, /* iopen glocks only */
GLF_VERIFY_DELETE = 18, /* iopen glocks only */
GLF_PENDING_REPLY = 19,
};
struct gfs2_glock {

1
fs/gfs2/trace_gfs2.h
View File

@ -53,6 +53,7 @@
{(1UL << GLF_DIRTY), "y" }, \
{(1UL << GLF_LFLUSH), "f" }, \
{(1UL << GLF_INVALIDATE_IN_PROGRESS), "i" }, \
{(1UL << GLF_PENDING_REPLY), "R" }, \
{(1UL << GLF_HAVE_REPLY), "r" }, \
{(1UL << GLF_INITIAL), "a" }, \
{(1UL << GLF_HAVE_FROZEN_REPLY), "F" }, \