Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938234AbZDJHUi (ORCPT ); Fri, 10 Apr 2009 03:20:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S938047AbZDJHRU (ORCPT ); Fri, 10 Apr 2009 03:17:20 -0400 Received: from mfbichi12.ns.itscom.net ([219.110.2.190]:35966 "EHLO mfbichi12.ns.itscom.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938006AbZDJHRL (ORCPT ); Fri, 10 Apr 2009 03:17:11 -0400 From: "J. R. Okajima" To: linux-kernel@vger.kernel.org Cc: greg@kroah.com, linux-fsdevel@vger.kernel.org, "J. R. Okajima" Subject: [RFC Aufs2 #5 25/29] aufs debug Date: Fri, 10 Apr 2009 16:02:39 +0900 Message-Id: <1239346963-30953-26-git-send-email-hooanon05@yahoo.co.jp> X-Mailer: git-send-email 1.6.1.284.g5dc13 In-Reply-To: <1239346963-30953-1-git-send-email-hooanon05@yahoo.co.jp> References: <1239346963-30953-1-git-send-email-hooanon05@yahoo.co.jp> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 20326 Lines: 802 initial commit debug print Signed-off-by: J. R. Okajima --- fs/aufs/debug.c | 414 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/aufs/debug.h | 243 ++++++++++++++++++++++++++++++++ fs/aufs/sysrq.c | 106 ++++++++++++++ 3 files changed, 763 insertions(+), 0 deletions(-) create mode 100644 fs/aufs/debug.c create mode 100644 fs/aufs/debug.h create mode 100644 fs/aufs/sysrq.c diff --git a/fs/aufs/debug.c b/fs/aufs/debug.c new file mode 100644 index 0000000..dd46950 --- /dev/null +++ b/fs/aufs/debug.c @@ -0,0 +1,414 @@ +/* + * Copyright (C) 2005-2009 Junjiro R. Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +/* + * debug print functions + */ + +#include "aufs.h" + +int aufs_debug; +MODULE_PARM_DESC(debug, "debug print"); +module_param_named(debug, aufs_debug, int, S_IRUGO | S_IWUSR | S_IWGRP); + +char *au_plevel = KERN_DEBUG; +#define dpri(fmt, arg...) do { \ + if (au_debug_test()) \ + printk("%s" fmt, au_plevel, ##arg); \ +} while (0) + +/* ---------------------------------------------------------------------- */ + +void au_dpri_whlist(struct au_nhash *whlist) +{ + int i; + struct hlist_head *head; + struct au_vdir_wh *tpos; + struct hlist_node *pos; + + for (i = 0; i < AuSize_NHASH; i++) { + head = whlist->heads + i; + hlist_for_each_entry(tpos, pos, head, wh_hash) + dpri("b%d, %.*s, %d\n", + tpos->wh_bindex, + tpos->wh_str.len, tpos->wh_str.name, + tpos->wh_str.len); + } +} + +void au_dpri_vdir(struct au_vdir *vdir) +{ + int i; + union au_vdir_deblk_p p; + unsigned char *o; + + if (!vdir || IS_ERR(vdir)) { + dpri("err %ld\n", PTR_ERR(vdir)); + return; + } + + dpri("nblk %d, deblk %p, last{%d, %p}, ver %lu\n", + vdir->vd_nblk, vdir->vd_deblk, + vdir->vd_last.i, vdir->vd_last.p.p, vdir->vd_version); + for (i = 0; i < vdir->vd_nblk; i++) { + p.deblk = vdir->vd_deblk[i]; + o = p.p; + dpri("[%d]: %p\n", i, o); + } +} + +static int do_pri_inode(aufs_bindex_t bindex, struct inode *inode, + struct dentry *wh) +{ + char *n = NULL; + int l = 0; + + if (!inode || IS_ERR(inode)) { + dpri("i%d: err %ld\n", bindex, PTR_ERR(inode)); + return -1; + } + + /* the type of i_blocks depends upon CONFIG_LSF */ + BUILD_BUG_ON(sizeof(inode->i_blocks) != sizeof(unsigned long) + && sizeof(inode->i_blocks) != sizeof(u64)); + if (wh) { + n = (void *)wh->d_name.name; + l = wh->d_name.len; + } + + dpri("i%d: i%lu, %s, cnt %d, nl %u, 0%o, sz %llu, blk %llu," + " ct %lld, np %lu, st 0x%lx, f 0x%x, g %x%s%.*s\n", + bindex, + inode->i_ino, inode->i_sb ? au_sbtype(inode->i_sb) : "??", + atomic_read(&inode->i_count), inode->i_nlink, inode->i_mode, + i_size_read(inode), (unsigned long long)inode->i_blocks, + (long long)timespec_to_ns(&inode->i_ctime) & 0x0ffff, + inode->i_mapping ? inode->i_mapping->nrpages : 0, + inode->i_state, inode->i_flags, inode->i_generation, + l ? ", wh " : "", l, n); + return 0; +} + +void au_dpri_inode(struct inode *inode) +{ + struct au_iinfo *iinfo; + aufs_bindex_t bindex; + int err; + + err = do_pri_inode(-1, inode, NULL); + if (err || !au_test_aufs(inode->i_sb)) + return; + + iinfo = au_ii(inode); + if (!iinfo) + return; + dpri("i-1: bstart %d, bend %d, gen %d\n", + iinfo->ii_bstart, iinfo->ii_bend, au_iigen(inode)); + if (iinfo->ii_bstart < 0) + return; + for (bindex = iinfo->ii_bstart; bindex <= iinfo->ii_bend; bindex++) + do_pri_inode(bindex, iinfo->ii_hinode[0 + bindex].hi_inode, + iinfo->ii_hinode[0 + bindex].hi_whdentry); +} + +static int do_pri_dentry(aufs_bindex_t bindex, struct dentry *dentry) +{ + struct dentry *wh = NULL; + + if (!dentry || IS_ERR(dentry)) { + dpri("d%d: err %ld\n", bindex, PTR_ERR(dentry)); + return -1; + } + /* do not call dget_parent() here */ + dpri("d%d: %.*s?/%.*s, %s, cnt %d, flags 0x%x\n", + bindex, + AuDLNPair(dentry->d_parent), AuDLNPair(dentry), + dentry->d_sb ? au_sbtype(dentry->d_sb) : "??", + atomic_read(&dentry->d_count), dentry->d_flags); + if (bindex >= 0 && dentry->d_inode && au_test_aufs(dentry->d_sb)) { + struct au_iinfo *iinfo = au_ii(dentry->d_inode); + if (iinfo) + wh = iinfo->ii_hinode[0 + bindex].hi_whdentry; + } + do_pri_inode(bindex, dentry->d_inode, wh); + return 0; +} + +void au_dpri_dentry(struct dentry *dentry) +{ + struct au_dinfo *dinfo; + aufs_bindex_t bindex; + int err; + + err = do_pri_dentry(-1, dentry); + if (err || !au_test_aufs(dentry->d_sb)) + return; + + dinfo = au_di(dentry); + if (!dinfo) + return; + dpri("d-1: bstart %d, bend %d, bwh %d, bdiropq %d, gen %d\n", + dinfo->di_bstart, dinfo->di_bend, + dinfo->di_bwh, dinfo->di_bdiropq, au_digen(dentry)); + if (dinfo->di_bstart < 0) + return; + for (bindex = dinfo->di_bstart; bindex <= dinfo->di_bend; bindex++) + do_pri_dentry(bindex, dinfo->di_hdentry[0 + bindex].hd_dentry); +} + +static int do_pri_file(aufs_bindex_t bindex, struct file *file) +{ + char a[32]; + + if (!file || IS_ERR(file)) { + dpri("f%d: err %ld\n", bindex, PTR_ERR(file)); + return -1; + } + a[0] = 0; + if (bindex < 0 + && file->f_dentry + && au_test_aufs(file->f_dentry->d_sb) + && au_fi(file)) + snprintf(a, sizeof(a), ", mmapped %d", au_test_mmapped(file)); + dpri("f%d: mode 0x%x, flags 0%o, cnt %ld, pos %llu%s\n", + bindex, file->f_mode, file->f_flags, (long)file_count(file), + file->f_pos, a); + if (file->f_dentry) + do_pri_dentry(bindex, file->f_dentry); + return 0; +} + +void au_dpri_file(struct file *file) +{ + struct au_finfo *finfo; + aufs_bindex_t bindex; + int err; + + err = do_pri_file(-1, file); + if (err || !file->f_dentry || !au_test_aufs(file->f_dentry->d_sb)) + return; + + finfo = au_fi(file); + if (!finfo) + return; + if (finfo->fi_bstart < 0) + return; + for (bindex = finfo->fi_bstart; bindex <= finfo->fi_bend; bindex++) { + struct au_hfile *hf; + + hf = finfo->fi_hfile + bindex; + do_pri_file(bindex, hf ? hf->hf_file : NULL); + } +} + +static int do_pri_br(aufs_bindex_t bindex, struct au_branch *br) +{ + struct vfsmount *mnt; + struct super_block *sb; + + if (!br || IS_ERR(br)) + goto out; + mnt = br->br_mnt; + if (!mnt || IS_ERR(mnt)) + goto out; + sb = mnt->mnt_sb; + if (!sb || IS_ERR(sb)) + goto out; + + dpri("s%d: {perm 0x%x, cnt %d, wbr %p}, " + "%s, dev 0x%02x%02x, flags 0x%lx, cnt(BIAS) %d, active %d, " + "xino %d\n", + bindex, br->br_perm, atomic_read(&br->br_count), br->br_wbr, + au_sbtype(sb), MAJOR(sb->s_dev), MINOR(sb->s_dev), + sb->s_flags, sb->s_count - S_BIAS, + atomic_read(&sb->s_active), !!br->br_xino.xi_file); + return 0; + + out: + dpri("s%d: err %ld\n", bindex, PTR_ERR(br)); + return -1; +} + +void au_dpri_sb(struct super_block *sb) +{ + struct au_sbinfo *sbinfo; + aufs_bindex_t bindex; + int err; + /* to reuduce stack size */ + struct { + struct vfsmount mnt; + struct au_branch fake; + } *a; + + /* this function can be called from magic sysrq */ + a = kzalloc(sizeof(*a), GFP_ATOMIC); + if (unlikely(!a)) { + dpri("no memory\n"); + return; + } + + a->mnt.mnt_sb = sb; + a->fake.br_perm = 0; + a->fake.br_mnt = &a->mnt; + a->fake.br_xino.xi_file = NULL; + atomic_set(&a->fake.br_count, 0); + smp_mb(); /* atomic_set */ + err = do_pri_br(-1, &a->fake); + kfree(a); + dpri("dev 0x%x\n", sb->s_dev); + if (err || !au_test_aufs(sb)) + return; + + sbinfo = au_sbi(sb); + if (!sbinfo) + return; + dpri("nw %d, gen %u, kobj %d\n", + atomic_read(&sbinfo->si_nowait.nw_len), sbinfo->si_generation, + atomic_read(&sbinfo->si_kobj.kref.refcount)); + for (bindex = 0; bindex <= sbinfo->si_bend; bindex++) + do_pri_br(bindex, sbinfo->si_branch[0 + bindex]); +} + +/* ---------------------------------------------------------------------- */ + +void au_dbg_sleep_jiffy(int jiffy) +{ + while (jiffy) + jiffy = schedule_timeout_uninterruptible(jiffy); +} + +void au_dbg_iattr(struct iattr *ia) +{ +#define AuBit(name) if (ia->ia_valid & ATTR_ ## name) \ + dpri(#name "\n") + AuBit(MODE); + AuBit(UID); + AuBit(GID); + AuBit(SIZE); + AuBit(ATIME); + AuBit(MTIME); + AuBit(CTIME); + AuBit(ATIME_SET); + AuBit(MTIME_SET); + AuBit(FORCE); + AuBit(ATTR_FLAG); + AuBit(KILL_SUID); + AuBit(KILL_SGID); + AuBit(FILE); + AuBit(KILL_PRIV); + AuBit(OPEN); + AuBit(TIMES_SET); +#undef AuBit + dpri("ia_file %p\n", ia->ia_file); +} + +/* ---------------------------------------------------------------------- */ + +void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen) +{ + struct dentry *parent; + + parent = dget_parent(dentry); + AuDebugOn(!S_ISDIR(dentry->d_inode->i_mode) + || IS_ROOT(dentry) + || au_digen(parent) != sigen); + dput(parent); +} + +void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen) +{ + struct dentry *parent; + + parent = dget_parent(dentry); + AuDebugOn(S_ISDIR(dentry->d_inode->i_mode) + || au_digen(parent) != sigen); + dput(parent); +} + +void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen) +{ + int err, i, j; + struct au_dcsub_pages dpages; + struct au_dpage *dpage; + struct dentry **dentries; + + err = au_dpages_init(&dpages, GFP_NOFS); + AuDebugOn(err); + err = au_dcsub_pages_rev(&dpages, parent, /*do_include*/1, NULL, NULL); + AuDebugOn(err); + for (i = dpages.ndpage - 1; !err && i >= 0; i--) { + dpage = dpages.dpages + i; + dentries = dpage->dentries; + for (j = dpage->ndentry - 1; !err && j >= 0; j--) + AuDebugOn(au_digen(dentries[j]) != sigen); + } + au_dpages_free(&dpages); +} + +void au_dbg_verify_hf(struct au_finfo *finfo) +{ + struct au_hfile *hf; + aufs_bindex_t bend, bindex; + + if (finfo->fi_bstart >= 0) { + bend = finfo->fi_bend; + for (bindex = finfo->fi_bstart; bindex <= bend; bindex++) { + hf = finfo->fi_hfile + bindex; + AuDebugOn(hf->hf_file || hf->hf_br); + } + } +} + +void au_dbg_verify_kthread(void) +{ + if (au_test_wkq(current)) { + au_dbg_blocked(); + BUG(); + } +} + +/* ---------------------------------------------------------------------- */ + +void au_debug_sbinfo_init(struct au_sbinfo *sbinfo __maybe_unused) +{ +#ifdef AuForceNoPlink + au_opt_clr(sbinfo->si_mntflags, PLINK); +#endif +#ifdef AuForceNoXino + au_opt_clr(sbinfo->si_mntflags, XINO); +#endif +#ifdef AuForceNoRefrof + au_opt_clr(sbinfo->si_mntflags, REFROF); +#endif +#ifdef AuForceHinotify + au_opt_set_udba(sbinfo->si_mntflags, UDBA_HINOTIFY); +#endif +} + +int __init au_debug_init(void) +{ + aufs_bindex_t bindex; + struct au_vdir_destr destr; + + bindex = -1; + AuDebugOn(bindex >= 0); + + destr.len = -1; + AuDebugOn(destr.len < NAME_MAX); + +#ifdef CONFIG_4KSTACKS + AuWarn("CONFIG_4KSTACKS is defined.\n"); +#endif + +#ifdef AuForceNoBrs + sysaufs_brs = 0; +#endif + + return 0; +} diff --git a/fs/aufs/debug.h b/fs/aufs/debug.h new file mode 100644 index 0000000..36ff0ea --- /dev/null +++ b/fs/aufs/debug.h @@ -0,0 +1,243 @@ +/* + * Copyright (C) 2005-2009 Junjiro R. Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +/* + * debug print functions + */ + +#ifndef __AUFS_DEBUG_H__ +#define __AUFS_DEBUG_H__ + +#ifdef __KERNEL__ + +#include +#include +#include +#include +#include +#include + +#ifdef CONFIG_AUFS_DEBUG +#define AuDebugOn(a) BUG_ON(a) + +/* module parameter */ +extern int aufs_debug; +static inline void au_debug(int n) +{ + aufs_debug = n; + smp_mb(); +} + +static inline int au_debug_test(void) +{ + return aufs_debug; +} +#else +#define AuDebugOn(a) do {} while (0) +#define au_debug() do {} while (0) +static inline int au_debug_test(void) +{ + return 0; +} +#endif /* CONFIG_AUFS_DEBUG */ + +/* ---------------------------------------------------------------------- */ + +/* debug print */ + +#define AuDpri(lvl, fmt, arg...) \ + printk(lvl AUFS_NAME " %s:%d:%s[%d]: " fmt, \ + __func__, __LINE__, current->comm, current->pid, ##arg) +#define AuDbg(fmt, arg...) do { \ + if (au_debug_test()) \ + AuDpri(KERN_DEBUG, fmt, ##arg); \ +} while (0) +#define AuLabel(l) AuDbg(#l "\n") +#define AuInfo(fmt, arg...) AuDpri(KERN_INFO, fmt, ##arg) +#define AuWarn(fmt, arg...) AuDpri(KERN_WARNING, fmt, ##arg) +#define AuErr(fmt, arg...) AuDpri(KERN_ERR, fmt, ##arg) +#define AuIOErr(fmt, arg...) AuErr("I/O Error, " fmt, ##arg) +#define AuWarn1(fmt, arg...) do { \ + static unsigned char _c; \ + if (!_c++) \ + AuWarn(fmt, ##arg); \ +} while (0) + +#define AuErr1(fmt, arg...) do { \ + static unsigned char _c; \ + if (!_c++) \ + AuErr(fmt, ##arg); \ +} while (0) + +#define AuIOErr1(fmt, arg...) do { \ + static unsigned char _c; \ + if (!_c++) \ + AuIOErr(fmt, ##arg); \ +} while (0) + +#define AuUnsupportMsg "This operation is not supported." \ + " Please report this application to aufs-users ML." +#define AuUnsupport(fmt, args...) do { \ + AuErr(AuUnsupportMsg "\n" fmt, ##args); \ + dump_stack(); \ +} while (0) + +#define AuTraceErr(e) do { \ + if (unlikely((e) < 0)) \ + AuDbg("err %d\n", (int)(e)); \ +} while (0) + +#define AuTraceErrPtr(p) do { \ + if (IS_ERR(p)) \ + AuDbg("err %ld\n", PTR_ERR(p)); \ +} while (0) + +/* dirty macros for debug print, use with "%.*s" and caution */ +#define AuLNPair(qstr) (qstr)->len, (qstr)->name +#define AuDLNPair(d) AuLNPair(&(d)->d_name) + +/* ---------------------------------------------------------------------- */ + +struct au_sbinfo; +struct au_finfo; +#ifdef CONFIG_AUFS_DEBUG +extern char *au_plevel; +struct au_nhash; +void au_dpri_whlist(struct au_nhash *whlist); +struct au_vdir; +void au_dpri_vdir(struct au_vdir *vdir); +void au_dpri_inode(struct inode *inode); +void au_dpri_dentry(struct dentry *dentry); +void au_dpri_file(struct file *filp); +void au_dpri_sb(struct super_block *sb); + +void au_dbg_sleep_jiffy(int jiffy); +void au_dbg_iattr(struct iattr *ia); + +void au_dbg_verify_dir_parent(struct dentry *dentry, unsigned int sigen); +void au_dbg_verify_nondir_parent(struct dentry *dentry, unsigned int sigen); +void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen); +void au_dbg_verify_hf(struct au_finfo *finfo); +void au_dbg_verify_kthread(void); + +int __init au_debug_init(void); +void au_debug_sbinfo_init(struct au_sbinfo *sbinfo); +#define AuDbgWhlist(w) do { \ + AuDbg(#w "\n"); \ + au_dpri_whlist(w); \ +} while (0) + +#define AuDbgVdir(v) do { \ + AuDbg(#v "\n"); \ + au_dpri_vdir(v); \ +} while (0) + +#define AuDbgInode(i) do { \ + AuDbg(#i "\n"); \ + au_dpri_inode(i); \ +} while (0) + +#define AuDbgDentry(d) do { \ + AuDbg(#d "\n"); \ + au_dpri_dentry(d); \ +} while (0) + +#define AuDbgFile(f) do { \ + AuDbg(#f "\n"); \ + au_dpri_file(f); \ +} while (0) + +#define AuDbgSb(sb) do { \ + AuDbg(#sb "\n"); \ + au_dpri_sb(sb); \ +} while (0) + +#define AuDbgSleep(sec) do { \ + AuDbg("sleep %d sec\n", sec); \ + ssleep(sec); \ +} while (0) + +#define AuDbgSleepJiffy(jiffy) do { \ + AuDbg("sleep %d jiffies\n", jiffy); \ + au_dbg_sleep_jiffy(jiffy); \ +} while (0) + +#define AuDbgIAttr(ia) do { \ + AuDbg("ia_valid 0x%x\n", (ia)->ia_valid); \ + au_dbg_iattr(ia); \ +} while (0) +#else +static inline void au_dbg_verify_dir_parent(struct dentry *dentry, + unsigned int sigen) +{ + /* empty */ +} +static inline void au_dbg_verify_nondir_parent(struct dentry *dentry, + unsigned int sigen) +{ + /* empty */ +} +static inline void au_dbg_verify_gen(struct dentry *parent, unsigned int sigen) +{ + /* empty */ +} +static inline void au_dbg_verify_hf(struct au_finfo *finfo) +{ + /* empty */ +} +static inline void au_dbg_verify_kthread(void) +{ + /* empty */ +} + +static inline int au_debug_init(void) +{ + return 0; +} +static inline void au_debug_sbinfo_init(struct au_sbinfo *sbinfo) +{ + /* empty */ +} +#define AuDbgWhlist(w) do {} while (0) +#define AuDbgVdir(v) do {} while (0) +#define AuDbgInode(i) do {} while (0) +#define AuDbgDentry(d) do {} while (0) +#define AuDbgFile(f) do {} while (0) +#define AuDbgSb(sb) do {} while (0) +#define AuDbgSleep(sec) do {} while (0) +#define AuDbgSleepJiffy(jiffy) do {} while (0) +#define AuDbgIAttr(ia) do {} while (0) +#endif /* CONFIG_AUFS_DEBUG */ + +/* ---------------------------------------------------------------------- */ + +#ifdef CONFIG_AUFS_MAGIC_SYSRQ +int __init au_sysrq_init(void); +void au_sysrq_fin(void); + +#ifdef CONFIG_HW_CONSOLE +#define au_dbg_blocked() do { \ + WARN_ON(1); \ + handle_sysrq('w', vc_cons[fg_console].d->vc_tty); \ +} while (0) +#else +#define au_dbg_blocked() do {} while (0) +#endif + +#else +static inline int au_sysrq_init(void) +{ + return 0; +} +#define au_sysrq_fin() do {} while (0) +#define au_dbg_blocked() do {} while (0) +#endif /* CONFIG_AUFS_MAGIC_SYSRQ */ + +#endif /* __KERNEL__ */ +#endif /* __AUFS_DEBUG_H__ */ diff --git a/fs/aufs/sysrq.c b/fs/aufs/sysrq.c new file mode 100644 index 0000000..419ff2c --- /dev/null +++ b/fs/aufs/sysrq.c @@ -0,0 +1,106 @@ +/* + * Copyright (C) 2005-2009 Junjiro R. Okajima + * + * This program, aufs is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +/* + * magic sysrq hanlder + */ + +#include +#include +#include +/* #include */ +#include "aufs.h" + +/* ---------------------------------------------------------------------- */ + +static void sysrq_sb(struct super_block *sb) +{ + char *plevel; + struct au_sbinfo *sbinfo; + struct file *file; + + plevel = au_plevel; + au_plevel = KERN_WARNING; + au_debug(1); + + sbinfo = au_sbi(sb); + pr_warning("si=%lx\n", sysaufs_si_id(sbinfo)); + pr_warning(AUFS_NAME ": superblock\n"); + au_dpri_sb(sb); + pr_warning(AUFS_NAME ": root dentry\n"); + au_dpri_dentry(sb->s_root); + pr_warning(AUFS_NAME ": root inode\n"); + au_dpri_inode(sb->s_root->d_inode); +#if 0 + struct inode *i; + pr_warning(AUFS_NAME ": isolated inode\n"); + list_for_each_entry(i, &sb->s_inodes, i_sb_list) + if (list_empty(&i->i_dentry)) + au_dpri_inode(i); +#endif + pr_warning(AUFS_NAME ": files\n"); + list_for_each_entry(file, &sb->s_files, f_u.fu_list) + if (!special_file(file->f_dentry->d_inode->i_mode)) + au_dpri_file(file); + + au_plevel = plevel; + au_debug(0); +} + +/* ---------------------------------------------------------------------- */ + +/* module parameter */ +static char *aufs_sysrq_key = "a"; +module_param_named(sysrq, aufs_sysrq_key, charp, S_IRUGO); +MODULE_PARM_DESC(sysrq, "MagicSysRq key for " AUFS_NAME); + +static void au_sysrq(int key __maybe_unused, + struct tty_struct *tty __maybe_unused) +{ + struct kobject *kobj; + struct au_sbinfo *sbinfo; + + /* spin_lock(&sysaufs_ket->list_lock); */ + list_for_each_entry(kobj, &sysaufs_ket->list, entry) { + sbinfo = container_of(kobj, struct au_sbinfo, si_kobj); + sysrq_sb(sbinfo->si_sb); + } + /* spin_unlock(&sysaufs_ket->list_lock); */ +} + +static struct sysrq_key_op au_sysrq_op = { + .handler = au_sysrq, + .help_msg = "Aufs", + .action_msg = "Aufs", + .enable_mask = SYSRQ_ENABLE_DUMP +}; + +/* ---------------------------------------------------------------------- */ + +int __init au_sysrq_init(void) +{ + int err; + char key; + + err = -1; + key = *aufs_sysrq_key; + if ('a' <= key && key <= 'z') + err = register_sysrq_key(key, &au_sysrq_op); + if (unlikely(err)) + AuErr("err %d, sysrq=%c\n", err, key); + return err; +} + +void au_sysrq_fin(void) +{ + int err; + err = unregister_sysrq_key(*aufs_sysrq_key, &au_sysrq_op); + if (unlikely(err)) + AuErr("err %d (ignored)\n", err); +} -- 1.6.1.284.g5dc13 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/