From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/fs/dlm/plock.c | 185 ++++++++++++++++++++++++++++-----------------
1 files changed, 115 insertions(+), 70 deletions(-)
diff --git a/kernel/fs/dlm/plock.c b/kernel/fs/dlm/plock.c
index a10d2bc..5f2e2fa 100644
--- a/kernel/fs/dlm/plock.c
+++ b/kernel/fs/dlm/plock.c
@@ -19,20 +19,20 @@
static wait_queue_head_t send_wq;
static wait_queue_head_t recv_wq;
+struct plock_async_data {
+ void *fl;
+ void *file;
+ struct file_lock flc;
+ int (*callback)(struct file_lock *fl, int result);
+};
+
struct plock_op {
struct list_head list;
int done;
struct dlm_plock_info info;
- int (*callback)(struct file_lock *fl, int result);
+ /* if set indicates async handling */
+ struct plock_async_data *data;
};
-
-struct plock_xop {
- struct plock_op xop;
- void *fl;
- void *file;
- struct file_lock flc;
-};
-
static inline void set_version(struct dlm_plock_info *info)
{
@@ -58,6 +58,12 @@
return 0;
}
+static void dlm_release_plock_op(struct plock_op *op)
+{
+ kfree(op->data);
+ kfree(op);
+}
+
static void send_op(struct plock_op *op)
{
set_version(&op->info);
@@ -74,8 +80,7 @@
abandoned waiter. So, we have to insert the unlock-close when the
lock call is interrupted. */
-static void do_unlock_close(struct dlm_ls *ls, u64 number,
- struct file *file, struct file_lock *fl)
+static void do_unlock_close(const struct dlm_plock_info *info)
{
struct plock_op *op;
@@ -84,15 +89,12 @@
return;
op->info.optype = DLM_PLOCK_OP_UNLOCK;
- op->info.pid = fl->fl_pid;
- op->info.fsid = ls->ls_global_id;
- op->info.number = number;
+ op->info.pid = info->pid;
+ op->info.fsid = info->fsid;
+ op->info.number = info->number;
op->info.start = 0;
op->info.end = OFFSET_MAX;
- if (fl->fl_lmops && fl->fl_lmops->lm_grant)
- op->info.owner = (__u64) fl->fl_pid;
- else
- op->info.owner = (__u64)(long) fl->fl_owner;
+ op->info.owner = info->owner;
op->info.flags |= DLM_PLOCK_FL_CLOSE;
send_op(op);
@@ -101,22 +103,21 @@
int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file,
int cmd, struct file_lock *fl)
{
+ struct plock_async_data *op_data;
struct dlm_ls *ls;
struct plock_op *op;
- struct plock_xop *xop;
int rv;
ls = dlm_find_lockspace_local(lockspace);
if (!ls)
return -EINVAL;
- xop = kzalloc(sizeof(*xop), GFP_NOFS);
- if (!xop) {
+ op = kzalloc(sizeof(*op), GFP_NOFS);
+ if (!op) {
rv = -ENOMEM;
goto out;
}
- op = &xop->xop;
op->info.optype = DLM_PLOCK_OP_LOCK;
op->info.pid = fl->fl_pid;
op->info.ex = (fl->fl_type == F_WRLCK);
@@ -125,35 +126,45 @@
op->info.number = number;
op->info.start = fl->fl_start;
op->info.end = fl->fl_end;
+ /* async handling */
if (fl->fl_lmops && fl->fl_lmops->lm_grant) {
+ op_data = kzalloc(sizeof(*op_data), GFP_NOFS);
+ if (!op_data) {
+ dlm_release_plock_op(op);
+ rv = -ENOMEM;
+ goto out;
+ }
+
/* fl_owner is lockd which doesn't distinguish
processes on the nfs client */
op->info.owner = (__u64) fl->fl_pid;
- op->callback = fl->fl_lmops->lm_grant;
- locks_init_lock(&xop->flc);
- locks_copy_lock(&xop->flc, fl);
- xop->fl = fl;
- xop->file = file;
+ op_data->callback = fl->fl_lmops->lm_grant;
+ locks_init_lock(&op_data->flc);
+ locks_copy_lock(&op_data->flc, fl);
+ op_data->fl = fl;
+ op_data->file = file;
+
+ op->data = op_data;
+
+ send_op(op);
+ rv = FILE_LOCK_DEFERRED;
+ goto out;
} else {
op->info.owner = (__u64)(long) fl->fl_owner;
}
send_op(op);
- if (!op->callback) {
- rv = wait_event_interruptible(recv_wq, (op->done != 0));
- if (rv == -ERESTARTSYS) {
- log_debug(ls, "dlm_posix_lock: wait killed %llx",
- (unsigned long long)number);
- spin_lock(&ops_lock);
- list_del(&op->list);
- spin_unlock(&ops_lock);
- kfree(xop);
- do_unlock_close(ls, number, file, fl);
- goto out;
- }
- } else {
- rv = FILE_LOCK_DEFERRED;
+ rv = wait_event_killable(recv_wq, (op->done != 0));
+ if (rv == -ERESTARTSYS) {
+ spin_lock(&ops_lock);
+ list_del(&op->list);
+ spin_unlock(&ops_lock);
+ log_debug(ls, "%s: wait interrupted %x %llx pid %d",
+ __func__, ls->ls_global_id,
+ (unsigned long long)number, op->info.pid);
+ dlm_release_plock_op(op);
+ do_unlock_close(&op->info);
goto out;
}
@@ -173,7 +184,7 @@
(unsigned long long)number);
}
- kfree(xop);
+ dlm_release_plock_op(op);
out:
dlm_put_lockspace(ls);
return rv;
@@ -183,11 +194,11 @@
/* Returns failure iff a successful lock operation should be canceled */
static int dlm_plock_callback(struct plock_op *op)
{
+ struct plock_async_data *op_data = op->data;
struct file *file;
struct file_lock *fl;
struct file_lock *flc;
int (*notify)(struct file_lock *fl, int result) = NULL;
- struct plock_xop *xop = (struct plock_xop *)op;
int rv = 0;
spin_lock(&ops_lock);
@@ -199,10 +210,10 @@
spin_unlock(&ops_lock);
/* check if the following 2 are still valid or make a copy */
- file = xop->file;
- flc = &xop->flc;
- fl = xop->fl;
- notify = op->callback;
+ file = op_data->file;
+ flc = &op_data->flc;
+ fl = op_data->fl;
+ notify = op_data->callback;
if (op->info.rv) {
notify(fl, op->info.rv);
@@ -233,7 +244,7 @@
}
out:
- kfree(xop);
+ dlm_release_plock_op(op);
return rv;
}
@@ -303,7 +314,7 @@
rv = 0;
out_free:
- kfree(op);
+ dlm_release_plock_op(op);
out:
dlm_put_lockspace(ls);
fl->fl_flags = fl_flags;
@@ -363,13 +374,15 @@
locks_init_lock(fl);
fl->fl_type = (op->info.ex) ? F_WRLCK : F_RDLCK;
fl->fl_flags = FL_POSIX;
- fl->fl_pid = -op->info.pid;
+ fl->fl_pid = op->info.pid;
+ if (op->info.nodeid != dlm_our_nodeid())
+ fl->fl_pid = -fl->fl_pid;
fl->fl_start = op->info.start;
fl->fl_end = op->info.end;
rv = 0;
}
- kfree(op);
+ dlm_release_plock_op(op);
out:
dlm_put_lockspace(ls);
return rv;
@@ -392,7 +405,7 @@
if (op->info.flags & DLM_PLOCK_FL_CLOSE)
list_del(&op->list);
else
- list_move(&op->list, &recv_list);
+ list_move_tail(&op->list, &recv_list);
memcpy(&info, &op->info, sizeof(info));
}
spin_unlock(&ops_lock);
@@ -405,7 +418,7 @@
(the process did not make an unlock call). */
if (op->info.flags & DLM_PLOCK_FL_CLOSE)
- kfree(op);
+ dlm_release_plock_op(op);
if (copy_to_user(u, &info, sizeof(info)))
return -EFAULT;
@@ -417,9 +430,9 @@
static ssize_t dev_write(struct file *file, const char __user *u, size_t count,
loff_t *ppos)
{
+ struct plock_op *op = NULL, *iter;
struct dlm_plock_info info;
- struct plock_op *op;
- int found = 0, do_callback = 0;
+ int do_callback = 0;
if (count != sizeof(info))
return -EINVAL;
@@ -430,31 +443,63 @@
if (check_version(&info))
return -EINVAL;
+ /*
+ * The results for waiting ops (SETLKW) can be returned in any
+ * order, so match all fields to find the op. The results for
+ * non-waiting ops are returned in the order that they were sent
+ * to userspace, so match the result with the first non-waiting op.
+ */
spin_lock(&ops_lock);
- list_for_each_entry(op, &recv_list, list) {
- if (op->info.fsid == info.fsid &&
- op->info.number == info.number &&
- op->info.owner == info.owner) {
- list_del_init(&op->list);
- memcpy(&op->info, &info, sizeof(info));
- if (op->callback)
- do_callback = 1;
- else
- op->done = 1;
- found = 1;
- break;
+ if (info.wait) {
+ list_for_each_entry(iter, &recv_list, list) {
+ if (iter->info.fsid == info.fsid &&
+ iter->info.number == info.number &&
+ iter->info.owner == info.owner &&
+ iter->info.pid == info.pid &&
+ iter->info.start == info.start &&
+ iter->info.end == info.end &&
+ iter->info.ex == info.ex &&
+ iter->info.wait) {
+ op = iter;
+ break;
+ }
}
+ } else {
+ list_for_each_entry(iter, &recv_list, list) {
+ if (!iter->info.wait &&
+ iter->info.fsid == info.fsid) {
+ op = iter;
+ break;
+ }
+ }
+ }
+
+ if (op) {
+ /* Sanity check that op and info match. */
+ if (info.wait)
+ WARN_ON(op->info.optype != DLM_PLOCK_OP_LOCK);
+ else
+ WARN_ON(op->info.number != info.number ||
+ op->info.owner != info.owner ||
+ op->info.optype != info.optype);
+
+ list_del_init(&op->list);
+ memcpy(&op->info, &info, sizeof(info));
+ if (op->data)
+ do_callback = 1;
+ else
+ op->done = 1;
}
spin_unlock(&ops_lock);
- if (found) {
+ if (op) {
if (do_callback)
dlm_plock_callback(op);
else
wake_up(&recv_wq);
} else
- log_print("dev_write no op %x %llx", info.fsid,
- (unsigned long long)info.number);
+ log_print("%s: no op %x %llx", __func__,
+ info.fsid, (unsigned long long)info.number);
return count;
}
--
Gitblit v1.6.2