diff options
Diffstat (limited to 'fs/aufs/sysrq.c')
| -rw-r--r-- | fs/aufs/sysrq.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/fs/aufs/sysrq.c b/fs/aufs/sysrq.c deleted file mode 100644 index a3e95bce6..000000000 --- a/fs/aufs/sysrq.c +++ /dev/null @@ -1,157 +0,0 @@ -/* - * Copyright (C) 2005-2015 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/* - * magic sysrq hanlder - */ - -/* #include <linux/sysrq.h> */ -#include <linux/writeback.h> -#include "aufs.h" - -/* ---------------------------------------------------------------------- */ - -static void sysrq_sb(struct super_block *sb) -{ - char *plevel; - struct au_sbinfo *sbinfo; - struct file *file; - struct au_sphlhead *files; - struct au_finfo *finfo; - - plevel = au_plevel; - au_plevel = KERN_WARNING; - - /* since we define pr_fmt, call printk directly */ -#define pr(str) printk(KERN_WARNING AUFS_NAME ": " str) - - sbinfo = au_sbi(sb); - printk(KERN_WARNING "si=%lx\n", sysaufs_si_id(sbinfo)); - pr("superblock\n"); - au_dpri_sb(sb); - -#if 0 - pr("root dentry\n"); - au_dpri_dentry(sb->s_root); - pr("root inode\n"); - au_dpri_inode(d_inode(sb->s_root)); -#endif - -#if 0 - do { - int err, i, j, ndentry; - struct au_dcsub_pages dpages; - struct au_dpage *dpage; - - err = au_dpages_init(&dpages, GFP_ATOMIC); - if (unlikely(err)) - break; - err = au_dcsub_pages(&dpages, sb->s_root, NULL, NULL); - if (!err) - for (i = 0; i < dpages.ndpage; i++) { - dpage = dpages.dpages + i; - ndentry = dpage->ndentry; - for (j = 0; j < ndentry; j++) - au_dpri_dentry(dpage->dentries[j]); - } - au_dpages_free(&dpages); - } while (0); -#endif - -#if 1 - { - struct inode *i; - - pr("isolated inode\n"); - spin_lock(&inode_sb_list_lock); - list_for_each_entry(i, &sb->s_inodes, i_sb_list) { - spin_lock(&i->i_lock); - if (1 || hlist_empty(&i->i_dentry)) - au_dpri_inode(i); - spin_unlock(&i->i_lock); - } - spin_unlock(&inode_sb_list_lock); - } -#endif - pr("files\n"); - files = &au_sbi(sb)->si_files; - spin_lock(&files->spin); - hlist_for_each_entry(finfo, &files->head, fi_hlist) { - umode_t mode; - - file = finfo->fi_file; - mode = file_inode(file)->i_mode; - if (!special_file(mode)) - au_dpri_file(file); - } - spin_unlock(&files->spin); - pr("done\n"); - -#undef pr - au_plevel = plevel; -} - -/* ---------------------------------------------------------------------- */ - -/* 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 au_sbinfo *sbinfo; - - lockdep_off(); - au_sbilist_lock(); - list_for_each_entry(sbinfo, &au_sbilist.head, si_list) - sysrq_sb(sbinfo->si_sb); - au_sbilist_unlock(); - lockdep_on(); -} - -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)) - pr_err("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)) - pr_err("err %d (ignored)\n", err); -} |