aboutsummaryrefslogtreecommitdiff
path: root/fs/dlm
diff options
context:
space:
mode:
Diffstat (limited to 'fs/dlm')
-rw-r--r--fs/dlm/ast.c2
-rw-r--r--fs/dlm/debug_fs.c4
-rw-r--r--fs/dlm/dlm_internal.h46
-rw-r--r--fs/dlm/lock.c26
-rw-r--r--fs/dlm/memory.c2
-rw-r--r--fs/dlm/rcom.c2
-rw-r--r--fs/dlm/user.c4
7 files changed, 63 insertions, 23 deletions
diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index 28b7b5288bd4..700ff2e0515a 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -139,7 +139,7 @@ void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status,
struct dlm_ls *ls = lkb->lkb_resource->res_ls;
int rv;
- if (lkb->lkb_dflags & DLM_DFL_USER) {
+ if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
dlm_user_add_ast(lkb, flags, mode, status, sbflags);
return;
}
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 65cfb58eaa6b..370a0c81a0b3 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -170,7 +170,7 @@ static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
u64 xid = 0;
u64 us;
- if (lkb->lkb_dflags & DLM_DFL_USER) {
+ if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
if (lkb->lkb_ua)
xid = lkb->lkb_ua->xid;
}
@@ -230,7 +230,7 @@ static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
{
u64 xid = 0;
- if (lkb->lkb_dflags & DLM_DFL_USER) {
+ if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
if (lkb->lkb_ua)
xid = lkb->lkb_ua->xid;
}
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 748bb483da1c..cd4f89217ee1 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -208,8 +208,10 @@ struct dlm_args {
/* lkb_dflags */
-#define DLM_DFL_USER 0x00000001
-#define DLM_DFL_ORPHAN 0x00000002
+#define DLM_DFL_USER_BIT 0
+#define __DLM_DFL_MIN_BIT DLM_DFL_USER_BIT
+#define DLM_DFL_ORPHAN_BIT 1
+#define __DLM_DFL_MAX_BIT DLM_DFL_ORPHAN_BIT
#define DLM_CB_CAST 0x00000001
#define DLM_CB_BAST 0x00000002
@@ -234,7 +236,7 @@ struct dlm_lkb {
uint32_t lkb_exflags; /* external flags from caller */
uint32_t lkb_sbflags; /* lksb flags */
uint32_t lkb_flags; /* internal flags */
- uint32_t lkb_dflags; /* distributed flags */
+ unsigned long lkb_dflags; /* distributed flags */
unsigned long lkb_iflags; /* internal flags */
uint32_t lkb_lvbseq; /* lvb sequence number */
@@ -733,6 +735,44 @@ static inline int dlm_no_directory(struct dlm_ls *ls)
return test_bit(LSFL_NODIR, &ls->ls_flags);
}
+/* takes a snapshot from dlm atomic flags */
+static inline uint32_t dlm_flags_val(const unsigned long *addr,
+ uint32_t min, uint32_t max)
+{
+ uint32_t bit = min, val = 0;
+
+ for_each_set_bit_from(bit, addr, max + 1) {
+ val |= BIT(bit);
+ }
+
+ return val;
+}
+
+static inline uint32_t dlm_dflags_val(const struct dlm_lkb *lkb)
+{
+ return dlm_flags_val(&lkb->lkb_dflags, __DLM_DFL_MIN_BIT,
+ __DLM_DFL_MAX_BIT);
+}
+
+static inline void dlm_set_flags_val(unsigned long *addr, uint32_t val,
+ uint32_t min, uint32_t max)
+{
+ uint32_t bit;
+
+ for (bit = min; bit < (max + 1); bit++) {
+ if (val & BIT(bit))
+ set_bit(bit, addr);
+ else
+ clear_bit(bit, addr);
+ }
+}
+
+static inline void dlm_set_dflags_val(struct dlm_lkb *lkb, uint32_t val)
+{
+ dlm_set_flags_val(&lkb->lkb_dflags, val, __DLM_DFL_MIN_BIT,
+ __DLM_DFL_MAX_BIT);
+}
+
int dlm_plock_init(void);
void dlm_plock_exit(void);
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 21c7abd7ef77..70737352d595 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -3410,7 +3410,7 @@ static void send_args(struct dlm_rsb *r, struct dlm_lkb *lkb,
ms->m_remid = cpu_to_le32(lkb->lkb_remid);
ms->m_exflags = cpu_to_le32(lkb->lkb_exflags);
ms->m_sbflags = cpu_to_le32(lkb->lkb_sbflags);
- ms->m_flags = cpu_to_le32(lkb->lkb_flags);
+ ms->m_flags = cpu_to_le32(dlm_dflags_val(lkb));
ms->m_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
ms->m_status = cpu_to_le32(lkb->lkb_status);
ms->m_grmode = cpu_to_le32(lkb->lkb_grmode);
@@ -3675,7 +3675,7 @@ static void receive_flags(struct dlm_lkb *lkb, struct dlm_message *ms)
{
lkb->lkb_exflags = le32_to_cpu(ms->m_exflags);
lkb->lkb_sbflags = le32_to_cpu(ms->m_sbflags);
- lkb->lkb_dflags = le32_to_cpu(ms->m_flags);
+ dlm_set_dflags_val(lkb, le32_to_cpu(ms->m_flags));
}
static void receive_flags_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
@@ -3685,7 +3685,7 @@ static void receive_flags_reply(struct dlm_lkb *lkb, struct dlm_message *ms,
return;
lkb->lkb_sbflags = le32_to_cpu(ms->m_sbflags);
- lkb->lkb_dflags = le32_to_cpu(ms->m_flags);
+ dlm_set_dflags_val(lkb, le32_to_cpu(ms->m_flags));
}
static int receive_extralen(struct dlm_message *ms)
@@ -3786,8 +3786,8 @@ static int validate_message(struct dlm_lkb *lkb, struct dlm_message *ms)
int error = 0;
/* currently mixing of user/kernel locks are not supported */
- if (ms->m_flags & cpu_to_le32(DLM_DFL_USER) &&
- ~lkb->lkb_dflags & DLM_DFL_USER) {
+ if (ms->m_flags & cpu_to_le32(BIT(DLM_DFL_USER_BIT)) &&
+ !test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
log_error(lkb->lkb_resource->res_ls,
"got user dlm message for a kernel lock");
error = -EINVAL;
@@ -5345,7 +5345,7 @@ static int receive_rcom_lock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
lkb->lkb_ownpid = le32_to_cpu(rl->rl_ownpid);
lkb->lkb_remid = le32_to_cpu(rl->rl_lkid);
lkb->lkb_exflags = le32_to_cpu(rl->rl_exflags);
- lkb->lkb_dflags = le32_to_cpu(rl->rl_flags);
+ dlm_set_dflags_val(lkb, le32_to_cpu(rl->rl_flags));
lkb->lkb_flags |= DLM_IFL_MSTCPY;
lkb->lkb_lvbseq = le32_to_cpu(rl->rl_lvbseq);
lkb->lkb_rqmode = rl->rl_rqmode;
@@ -5571,9 +5571,9 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
}
/* After ua is attached to lkb it will be freed by dlm_free_lkb().
- When DLM_DFL_USER is set, the dlm knows that this is a userspace
+ When DLM_DFL_USER_BIT is set, the dlm knows that this is a userspace
lock and that lkb_astparam is the dlm_user_args structure. */
- lkb->lkb_dflags |= DLM_DFL_USER;
+ set_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags);
error = request_lock(ls, lkb, name, namelen, &args);
switch (error) {
@@ -5688,7 +5688,7 @@ int dlm_user_adopt_orphan(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
lkb = iter;
list_del_init(&iter->lkb_ownqueue);
- iter->lkb_dflags &= ~DLM_DFL_ORPHAN;
+ clear_bit(DLM_DFL_ORPHAN_BIT, &iter->lkb_dflags);
*lkid = iter->lkb_id;
break;
}
@@ -5932,7 +5932,7 @@ static struct dlm_lkb *del_proc_lock(struct dlm_ls *ls,
list_del_init(&lkb->lkb_ownqueue);
if (lkb->lkb_exflags & DLM_LKF_PERSISTENT)
- lkb->lkb_dflags |= DLM_DFL_ORPHAN;
+ set_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags);
else
lkb->lkb_flags |= DLM_IFL_DEAD;
out:
@@ -6091,7 +6091,7 @@ int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
int error;
/* we currently can't set a valid user lock */
- if (lkb_dflags & DLM_DFL_USER)
+ if (lkb_dflags & BIT(DLM_DFL_USER_BIT))
return -EOPNOTSUPP;
lksb = kzalloc(sizeof(*lksb), GFP_NOFS);
@@ -6104,11 +6104,11 @@ int dlm_debug_add_lkb(struct dlm_ls *ls, uint32_t lkb_id, char *name, int len,
return error;
}
- lkb->lkb_dflags = lkb_dflags;
+ dlm_set_dflags_val(lkb, lkb_dflags);
lkb->lkb_nodeid = lkb_nodeid;
lkb->lkb_lksb = lksb;
/* user specific pointer, just don't have it NULL for kernel locks */
- if (~lkb_dflags & DLM_DFL_USER)
+ if (~lkb_dflags & BIT(DLM_DFL_USER_BIT))
lkb->lkb_astparam = (void *)0xDEADBEEF;
error = find_rsb(ls, name, len, 0, R_REQUEST, &r);
diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index c1a832e8a72b..64f212a066cf 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -118,7 +118,7 @@ struct dlm_lkb *dlm_allocate_lkb(struct dlm_ls *ls)
void dlm_free_lkb(struct dlm_lkb *lkb)
{
- if (lkb->lkb_dflags & DLM_DFL_USER) {
+ if (test_bit(DLM_DFL_USER_BIT, &lkb->lkb_dflags)) {
struct dlm_user_args *ua;
ua = lkb->lkb_ua;
if (ua) {
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index 005ee85218c5..f4afdf892f78 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -415,7 +415,7 @@ static void pack_rcom_lock(struct dlm_rsb *r, struct dlm_lkb *lkb,
rl->rl_ownpid = cpu_to_le32(lkb->lkb_ownpid);
rl->rl_lkid = cpu_to_le32(lkb->lkb_id);
rl->rl_exflags = cpu_to_le32(lkb->lkb_exflags);
- rl->rl_flags = cpu_to_le32(lkb->lkb_dflags);
+ rl->rl_flags = cpu_to_le32(dlm_dflags_val(lkb));
rl->rl_lvbseq = cpu_to_le32(lkb->lkb_lvbseq);
rl->rl_rqmode = lkb->lkb_rqmode;
rl->rl_grmode = lkb->lkb_grmode;
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index dd4b9c8f226c..233c88e46710 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -183,7 +183,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
struct dlm_user_proc *proc;
int rv;
- if (lkb->lkb_dflags & DLM_DFL_ORPHAN ||
+ if (test_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags) ||
lkb->lkb_flags & DLM_IFL_DEAD)
return;
@@ -196,7 +196,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, uint32_t flags, int mode,
for cases where a completion ast is received for an operation that
began before clear_proc_locks did its cancel/unlock. */
- if (lkb->lkb_dflags & DLM_DFL_ORPHAN ||
+ if (test_bit(DLM_DFL_ORPHAN_BIT, &lkb->lkb_dflags) ||
lkb->lkb_flags & DLM_IFL_DEAD)
goto out;
Copyright © 1990 – 2022 jet tsang zeon-git.
All Rights Reverse Engineered.