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 --- fs/jffs2/debug.h | 276 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 276 insertions(+) create mode 100644 fs/jffs2/debug.h (limited to 'fs/jffs2/debug.h') diff --git a/fs/jffs2/debug.h b/fs/jffs2/debug.h new file mode 100644 index 000000000..40e203b6e --- /dev/null +++ b/fs/jffs2/debug.h @@ -0,0 +1,276 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright © 2001-2007 Red Hat, Inc. + * Copyright © 2004-2010 David Woodhouse + * + * Created by David Woodhouse + * + * For licensing information, see the file 'LICENCE' in this directory. + * + */ + +#ifndef _JFFS2_DEBUG_H_ +#define _JFFS2_DEBUG_H_ + +#include +#include + +#ifndef CONFIG_JFFS2_FS_DEBUG +#define CONFIG_JFFS2_FS_DEBUG 0 +#endif + +#if CONFIG_JFFS2_FS_DEBUG > 0 +/* Enable "paranoia" checks and dumps */ +#define JFFS2_DBG_PARANOIA_CHECKS +#define JFFS2_DBG_DUMPS + +/* + * By defining/undefining the below macros one may select debugging messages + * fro specific JFFS2 subsystems. + */ +#define JFFS2_DBG_READINODE_MESSAGES +#define JFFS2_DBG_FRAGTREE_MESSAGES +#define JFFS2_DBG_DENTLIST_MESSAGES +#define JFFS2_DBG_NODEREF_MESSAGES +#define JFFS2_DBG_INOCACHE_MESSAGES +#define JFFS2_DBG_SUMMARY_MESSAGES +#define JFFS2_DBG_FSBUILD_MESSAGES +#endif + +#if CONFIG_JFFS2_FS_DEBUG > 1 +#define JFFS2_DBG_FRAGTREE2_MESSAGES +#define JFFS2_DBG_READINODE2_MESSAGES +#define JFFS2_DBG_MEMALLOC_MESSAGES +#endif + +/* Sanity checks are supposed to be light-weight and enabled by default */ +#define JFFS2_DBG_SANITY_CHECKS + +/* + * Dx() are mainly used for debugging messages, they must go away and be + * superseded by nicer dbg_xxx() macros... + */ +#if CONFIG_JFFS2_FS_DEBUG > 0 +#define DEBUG +#define D1(x) x +#else +#define D1(x) +#endif + +#if CONFIG_JFFS2_FS_DEBUG > 1 +#define D2(x) x +#else +#define D2(x) +#endif + +#define jffs2_dbg(level, fmt, ...) \ +do { \ + if (CONFIG_JFFS2_FS_DEBUG >= level) \ + pr_debug(fmt, ##__VA_ARGS__); \ +} while (0) + +/* The prefixes of JFFS2 messages */ +#define JFFS2_DBG KERN_DEBUG +#define JFFS2_DBG_PREFIX "[JFFS2 DBG]" +#define JFFS2_DBG_MSG_PREFIX JFFS2_DBG JFFS2_DBG_PREFIX + +/* JFFS2 message macros */ +#define JFFS2_ERROR(fmt, ...) \ + pr_err("error: (%d) %s: " fmt, \ + task_pid_nr(current), __func__, ##__VA_ARGS__) + +#define JFFS2_WARNING(fmt, ...) \ + pr_warn("warning: (%d) %s: " fmt, \ + task_pid_nr(current), __func__, ##__VA_ARGS__) + +#define JFFS2_NOTICE(fmt, ...) \ + pr_notice("notice: (%d) %s: " fmt, \ + task_pid_nr(current), __func__, ##__VA_ARGS__) + +#define JFFS2_DEBUG(fmt, ...) \ + printk(KERN_DEBUG "[JFFS2 DBG] (%d) %s: " fmt, \ + task_pid_nr(current), __func__, ##__VA_ARGS__) + +/* + * We split our debugging messages on several parts, depending on the JFFS2 + * subsystem the message belongs to. + */ +/* Read inode debugging messages */ +#ifdef JFFS2_DBG_READINODE_MESSAGES +#define dbg_readinode(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_readinode(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif +#ifdef JFFS2_DBG_READINODE2_MESSAGES +#define dbg_readinode2(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_readinode2(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Fragtree build debugging messages */ +#ifdef JFFS2_DBG_FRAGTREE_MESSAGES +#define dbg_fragtree(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_fragtree(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif +#ifdef JFFS2_DBG_FRAGTREE2_MESSAGES +#define dbg_fragtree2(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_fragtree2(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Directory entry list manilulation debugging messages */ +#ifdef JFFS2_DBG_DENTLIST_MESSAGES +#define dbg_dentlist(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_dentlist(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Print the messages about manipulating node_refs */ +#ifdef JFFS2_DBG_NODEREF_MESSAGES +#define dbg_noderef(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_noderef(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Manipulations with the list of inodes (JFFS2 inocache) */ +#ifdef JFFS2_DBG_INOCACHE_MESSAGES +#define dbg_inocache(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_inocache(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Summary debugging messages */ +#ifdef JFFS2_DBG_SUMMARY_MESSAGES +#define dbg_summary(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_summary(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* File system build messages */ +#ifdef JFFS2_DBG_FSBUILD_MESSAGES +#define dbg_fsbuild(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_fsbuild(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Watch the object allocations */ +#ifdef JFFS2_DBG_MEMALLOC_MESSAGES +#define dbg_memalloc(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_memalloc(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* Watch the XATTR subsystem */ +#ifdef JFFS2_DBG_XATTR_MESSAGES +#define dbg_xattr(fmt, ...) JFFS2_DEBUG(fmt, ##__VA_ARGS__) +#else +#define dbg_xattr(fmt, ...) no_printk(fmt, ##__VA_ARGS__) +#endif + +/* "Sanity" checks */ +void +__jffs2_dbg_acct_sanity_check_nolock(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_acct_sanity_check(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); + +/* "Paranoia" checks */ +void +__jffs2_dbg_fragtree_paranoia_check(struct jffs2_inode_info *f); +void +__jffs2_dbg_fragtree_paranoia_check_nolock(struct jffs2_inode_info *f); +void +__jffs2_dbg_acct_paranoia_check(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_acct_paranoia_check_nolock(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_prewrite_paranoia_check(struct jffs2_sb_info *c, + uint32_t ofs, int len); + +/* "Dump" functions */ +void +__jffs2_dbg_dump_jeb(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_dump_jeb_nolock(struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_dump_block_lists(struct jffs2_sb_info *c); +void +__jffs2_dbg_dump_block_lists_nolock(struct jffs2_sb_info *c); +void +__jffs2_dbg_dump_node_refs(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_dump_node_refs_nolock(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb); +void +__jffs2_dbg_dump_fragtree(struct jffs2_inode_info *f); +void +__jffs2_dbg_dump_fragtree_nolock(struct jffs2_inode_info *f); +void +__jffs2_dbg_dump_buffer(unsigned char *buf, int len, uint32_t offs); +void +__jffs2_dbg_dump_node(struct jffs2_sb_info *c, uint32_t ofs); + +#ifdef JFFS2_DBG_PARANOIA_CHECKS +#define jffs2_dbg_fragtree_paranoia_check(f) \ + __jffs2_dbg_fragtree_paranoia_check(f) +#define jffs2_dbg_fragtree_paranoia_check_nolock(f) \ + __jffs2_dbg_fragtree_paranoia_check_nolock(f) +#define jffs2_dbg_acct_paranoia_check(c, jeb) \ + __jffs2_dbg_acct_paranoia_check(c,jeb) +#define jffs2_dbg_acct_paranoia_check_nolock(c, jeb) \ + __jffs2_dbg_acct_paranoia_check_nolock(c,jeb) +#define jffs2_dbg_prewrite_paranoia_check(c, ofs, len) \ + __jffs2_dbg_prewrite_paranoia_check(c, ofs, len) +#else +#define jffs2_dbg_fragtree_paranoia_check(f) +#define jffs2_dbg_fragtree_paranoia_check_nolock(f) +#define jffs2_dbg_acct_paranoia_check(c, jeb) +#define jffs2_dbg_acct_paranoia_check_nolock(c, jeb) +#define jffs2_dbg_prewrite_paranoia_check(c, ofs, len) +#endif /* !JFFS2_PARANOIA_CHECKS */ + +#ifdef JFFS2_DBG_DUMPS +#define jffs2_dbg_dump_jeb(c, jeb) \ + __jffs2_dbg_dump_jeb(c, jeb); +#define jffs2_dbg_dump_jeb_nolock(jeb) \ + __jffs2_dbg_dump_jeb_nolock(jeb); +#define jffs2_dbg_dump_block_lists(c) \ + __jffs2_dbg_dump_block_lists(c) +#define jffs2_dbg_dump_block_lists_nolock(c) \ + __jffs2_dbg_dump_block_lists_nolock(c) +#define jffs2_dbg_dump_fragtree(f) \ + __jffs2_dbg_dump_fragtree(f); +#define jffs2_dbg_dump_fragtree_nolock(f) \ + __jffs2_dbg_dump_fragtree_nolock(f); +#define jffs2_dbg_dump_buffer(buf, len, offs) \ + __jffs2_dbg_dump_buffer(*buf, len, offs); +#define jffs2_dbg_dump_node(c, ofs) \ + __jffs2_dbg_dump_node(c, ofs); +#else +#define jffs2_dbg_dump_jeb(c, jeb) +#define jffs2_dbg_dump_jeb_nolock(jeb) +#define jffs2_dbg_dump_block_lists(c) +#define jffs2_dbg_dump_block_lists_nolock(c) +#define jffs2_dbg_dump_fragtree(f) +#define jffs2_dbg_dump_fragtree_nolock(f) +#define jffs2_dbg_dump_buffer(buf, len, offs) +#define jffs2_dbg_dump_node(c, ofs) +#endif /* !JFFS2_DBG_DUMPS */ + +#ifdef JFFS2_DBG_SANITY_CHECKS +#define jffs2_dbg_acct_sanity_check(c, jeb) \ + __jffs2_dbg_acct_sanity_check(c, jeb) +#define jffs2_dbg_acct_sanity_check_nolock(c, jeb) \ + __jffs2_dbg_acct_sanity_check_nolock(c, jeb) +#else +#define jffs2_dbg_acct_sanity_check(c, jeb) +#define jffs2_dbg_acct_sanity_check_nolock(c, jeb) +#endif /* !JFFS2_DBG_SANITY_CHECKS */ + +#endif /* _JFFS2_DEBUG_H_ */ -- cgit v1.3.1