From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- security/lsm.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 security/lsm.h (limited to 'security/lsm.h') diff --git a/security/lsm.h b/security/lsm.h new file mode 100644 index 000000000..32f808ad4 --- /dev/null +++ b/security/lsm.h @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * LSM functions + */ + +#ifndef _LSM_H_ +#define _LSM_H_ + +#include +#include +#include + +/* LSM debugging */ +extern bool lsm_debug; +#define lsm_pr(...) pr_info(__VA_ARGS__) +#define lsm_pr_cont(...) pr_cont(__VA_ARGS__) +#define lsm_pr_dbg(...) \ + do { \ + if (lsm_debug) \ + pr_info(__VA_ARGS__); \ + } while (0) + +/* List of configured LSMs */ +extern unsigned int lsm_active_cnt; +extern const struct lsm_id *lsm_idlist[]; + +/* LSM blob configuration */ +extern struct lsm_blob_sizes blob_sizes; + +/* LSM blob caches */ +extern struct kmem_cache *lsm_file_cache; +extern struct kmem_cache *lsm_backing_file_cache; +extern struct kmem_cache *lsm_inode_cache; + +/* LSM blob allocators */ +int lsm_cred_alloc(struct cred *cred, gfp_t gfp); +int lsm_task_alloc(struct task_struct *task); + +/* LSM framework initializers */ + +#ifdef CONFIG_SECURITYFS +int securityfs_init(void); +#else +static inline int securityfs_init(void) +{ + return 0; +} +#endif /* CONFIG_SECURITYFS */ + +#endif /* _LSM_H_ */ -- cgit v1.3.1