From: Alex Markuze <amarkuze@redhat.com>
Date: Tue, 25 Feb 2025 16:57:11 +0000 (+0000)
Subject: Adding a tls storage struct
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=2c8bdb26b5a3d7fec905873a58db3f67d178dcb5;p=ceph-client.git

Adding a tls storage struct
---

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 64934e0830af..2dccb914be9c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -781,7 +781,10 @@ struct kmap_ctrl {
 	pte_t				pteval[KM_MAX_IDX];
 #endif
 };
-
+struct tls_storage {
+	void (*release)(void *state);
+	void *state;
+};
 struct task_struct {
 #ifdef CONFIG_THREAD_INFO_IN_TASK
 	/*
@@ -1241,6 +1244,9 @@ struct task_struct {
 	/* Journalling filesystem info: */
 	void				*journal_info;
 
+	/* TLS storage for per-task private data */
+	struct tls_storage		tls;
+
 	/* Stacked block device info: */
 	struct bio_list			*bio_list;
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 9b301180fd41..1ed6814c2601 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -182,6 +182,11 @@ static inline struct task_struct *alloc_task_struct_node(int node)
 
 static inline void free_task_struct(struct task_struct *tsk)
 {
+	if (tsk->tls.release) {
+		tsk->tls.release(tsk->tls.state);
+		tsk->tls.state = NULL;
+		tsk->tls.release = NULL;
+	}
 	kmem_cache_free(task_struct_cachep, tsk);
 }
 
diff --git a/net/ceph/ceph_san.c b/net/ceph/ceph_san.c
index eb04740e5fed..ed6592b5b0ea 100644
--- a/net/ceph/ceph_san.c
+++ b/net/ceph/ceph_san.c
@@ -71,6 +71,7 @@ int cephsan_init(void)
 	struct ceph_san_tls_logger *tls;
 	struct cephsan_pagefrag *pf;
 
+	struct task_struct *task = current;
 	for_each_possible_cpu(cpu) {
 		tls = per_cpu_ptr(&ceph_san_tls, cpu);
 		tls->pages = alloc_pages(GFP_KERNEL, get_order(CEPH_SAN_MAX_LOGS * sizeof(struct ceph_san_log_entry)));