1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) International Business Machines Corp., 2000-2004 4 * Portions Copyright (C) Christoph Hellwig, 2001-2002 5 */ 6 7 #include <linux/fs.h> 8 #include <linux/ctype.h> 9 #include <linux/module.h> 10 #include <linux/proc_fs.h> 11 #include <linux/seq_file.h> 12 #include <linux/uaccess.h> 13 #include "jfs_incore.h" 14 #include "jfs_filsys.h" 15 #include "jfs_debug.h" 16 17 #ifdef PROC_FS_JFS /* see jfs_debug.h */ 18 19 #ifdef CONFIG_JFS_DEBUG 20 static int jfs_loglevel_proc_show(struct seq_file *m, void *v) 21 { 22 seq_printf(m, "%d\n", jfsloglevel); 23 return 0; 24 } 25 26 static int jfs_loglevel_proc_open(struct inode *inode, struct file *file) 27 { 28 return single_open(file, jfs_loglevel_proc_show, NULL); 29 } 30 31 static ssize_t jfs_loglevel_proc_write(struct file *file, 32 const char __user *buffer, size_t count, loff_t *ppos) 33 { 34 char c; 35 36 if (get_user(c, buffer)) 37 return -EFAULT; 38 39 /* yes, I know this is an ASCIIism. --hch */ 40 if (c < '0' || c > '9') 41 return -EINVAL; 42 jfsloglevel = c - '0'; 43 return count; 44 } 45 46 static const struct proc_ops jfs_loglevel_proc_ops = { 47 .proc_open = jfs_loglevel_proc_open, 48 .proc_read = seq_read, 49 .proc_lseek = seq_lseek, 50 .proc_release = single_release, 51 .proc_write = jfs_loglevel_proc_write, 52 }; 53 #endif 54 55 void jfs_proc_init(void) 56 { 57 struct proc_dir_entry *base; 58 59 base = proc_mkdir("fs/jfs", NULL); 60 if (!base) 61 return; 62 63 #ifdef CONFIG_JFS_STATISTICS 64 proc_create_single("lmstats", 0, base, jfs_lmstats_proc_show); 65 proc_create_single("txstats", 0, base, jfs_txstats_proc_show); 66 proc_create_single("xtstat", 0, base, jfs_xtstat_proc_show); 67 proc_create_single("mpstat", 0, base, jfs_mpstat_proc_show); 68 #endif 69 #ifdef CONFIG_JFS_DEBUG 70 proc_create_single("TxAnchor", 0, base, jfs_txanchor_proc_show); 71 proc_create("loglevel", 0, base, &jfs_loglevel_proc_ops); 72 #endif 73 } 74 75 void jfs_proc_clean(void) 76 { 77 remove_proc_subtree("fs/jfs", NULL); 78 } 79 80 #endif /* PROC_FS_JFS */ 81