mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 04:30:52 +07:00
227 lines
5.7 KiB
C
227 lines
5.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2005-2019 Junjiro R. Okajima
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*
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* This program, aufs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* debug print functions
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*/
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#ifndef __AUFS_DEBUG_H__
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#define __AUFS_DEBUG_H__
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#ifdef __KERNEL__
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#include <linux/atomic.h>
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#include <linux/module.h>
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#include <linux/kallsyms.h>
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#include <linux/sysrq.h>
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#ifdef CONFIG_AUFS_DEBUG
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#define AuDebugOn(a) BUG_ON(a)
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/* module parameter */
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extern atomic_t aufs_debug;
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static inline void au_debug_on(void)
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{
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atomic_inc(&aufs_debug);
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}
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static inline void au_debug_off(void)
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{
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atomic_dec_if_positive(&aufs_debug);
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}
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static inline int au_debug_test(void)
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{
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return atomic_read(&aufs_debug) > 0;
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}
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#else
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#define AuDebugOn(a) do {} while (0)
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AuStubVoid(au_debug_on, void)
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AuStubVoid(au_debug_off, void)
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AuStubInt0(au_debug_test, void)
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#endif /* CONFIG_AUFS_DEBUG */
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#define param_check_atomic_t(name, p) __param_check(name, p, atomic_t)
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/* ---------------------------------------------------------------------- */
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/* debug print */
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#define AuDbg(fmt, ...) do { \
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if (au_debug_test()) \
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pr_debug("DEBUG: " fmt, ##__VA_ARGS__); \
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} while (0)
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#define AuLabel(l) AuDbg(#l "\n")
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#define AuIOErr(fmt, ...) pr_err("I/O Error, " fmt, ##__VA_ARGS__)
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#define AuWarn1(fmt, ...) do { \
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static unsigned char _c; \
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if (!_c++) \
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pr_warn(fmt, ##__VA_ARGS__); \
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} while (0)
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#define AuErr1(fmt, ...) do { \
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static unsigned char _c; \
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if (!_c++) \
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pr_err(fmt, ##__VA_ARGS__); \
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} while (0)
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#define AuIOErr1(fmt, ...) do { \
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static unsigned char _c; \
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if (!_c++) \
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AuIOErr(fmt, ##__VA_ARGS__); \
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} while (0)
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#define AuUnsupportMsg "This operation is not supported." \
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" Please report this application to aufs-users ML."
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#define AuUnsupport(fmt, ...) do { \
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pr_err(AuUnsupportMsg "\n" fmt, ##__VA_ARGS__); \
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dump_stack(); \
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} while (0)
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#define AuTraceErr(e) do { \
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if (unlikely((e) < 0)) \
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AuDbg("err %d\n", (int)(e)); \
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} while (0)
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#define AuTraceErrPtr(p) do { \
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if (IS_ERR(p)) \
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AuDbg("err %ld\n", PTR_ERR(p)); \
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} while (0)
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/* dirty macros for debug print, use with "%.*s" and caution */
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#define AuLNPair(qstr) (qstr)->len, (qstr)->name
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/* ---------------------------------------------------------------------- */
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struct dentry;
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#ifdef CONFIG_AUFS_DEBUG
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extern struct mutex au_dbg_mtx;
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extern char *au_plevel;
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struct au_nhash;
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void au_dpri_whlist(struct au_nhash *whlist);
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struct au_vdir;
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void au_dpri_vdir(struct au_vdir *vdir);
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struct inode;
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void au_dpri_inode(struct inode *inode);
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void au_dpri_dalias(struct inode *inode);
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void au_dpri_dentry(struct dentry *dentry);
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struct file;
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void au_dpri_file(struct file *filp);
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struct super_block;
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void au_dpri_sb(struct super_block *sb);
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#define au_dbg_verify_dinode(d) __au_dbg_verify_dinode(d, __func__, __LINE__)
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void __au_dbg_verify_dinode(struct dentry *dentry, const char *func, int line);
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void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen);
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void au_dbg_verify_kthread(void);
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int __init au_debug_init(void);
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#define AuDbgWhlist(w) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#w "\n"); \
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au_dpri_whlist(w); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgVdir(v) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#v "\n"); \
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au_dpri_vdir(v); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgInode(i) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#i "\n"); \
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au_dpri_inode(i); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgDAlias(i) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#i "\n"); \
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au_dpri_dalias(i); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgDentry(d) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#d "\n"); \
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au_dpri_dentry(d); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgFile(f) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#f "\n"); \
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au_dpri_file(f); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgSb(sb) do { \
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mutex_lock(&au_dbg_mtx); \
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AuDbg(#sb "\n"); \
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au_dpri_sb(sb); \
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mutex_unlock(&au_dbg_mtx); \
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} while (0)
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#define AuDbgSym(addr) do { \
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char sym[KSYM_SYMBOL_LEN]; \
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sprint_symbol(sym, (unsigned long)addr); \
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AuDbg("%s\n", sym); \
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} while (0)
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#else
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AuStubVoid(au_dbg_verify_dinode, struct dentry *dentry)
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AuStubVoid(au_dbg_verify_gen, struct dentry *parent, unsigned int sigen)
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AuStubVoid(au_dbg_verify_kthread, void)
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AuStubInt0(__init au_debug_init, void)
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#define AuDbgWhlist(w) do {} while (0)
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#define AuDbgVdir(v) do {} while (0)
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#define AuDbgInode(i) do {} while (0)
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#define AuDbgDAlias(i) do {} while (0)
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#define AuDbgDentry(d) do {} while (0)
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#define AuDbgFile(f) do {} while (0)
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#define AuDbgSb(sb) do {} while (0)
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#define AuDbgSym(addr) do {} while (0)
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#endif /* CONFIG_AUFS_DEBUG */
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/* ---------------------------------------------------------------------- */
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#ifdef CONFIG_AUFS_MAGIC_SYSRQ
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int __init au_sysrq_init(void);
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void au_sysrq_fin(void);
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#ifdef CONFIG_HW_CONSOLE
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#define au_dbg_blocked() do { \
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WARN_ON(1); \
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handle_sysrq('w'); \
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} while (0)
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#else
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AuStubVoid(au_dbg_blocked, void)
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#endif
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#else
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AuStubInt0(__init au_sysrq_init, void)
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AuStubVoid(au_sysrq_fin, void)
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AuStubVoid(au_dbg_blocked, void)
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#endif /* CONFIG_AUFS_MAGIC_SYSRQ */
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#endif /* __KERNEL__ */
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#endif /* __AUFS_DEBUG_H__ */
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