diff options
Diffstat (limited to 'fs/jbd2/journal.c')
| -rw-r--r-- | fs/jbd2/journal.c | 87 |
1 files changed, 36 insertions, 51 deletions
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 78d63b818f0b..f37324aee817 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -35,6 +35,7 @@ #include <linux/kthread.h> #include <linux/poison.h> #include <linux/proc_fs.h> +#include <linux/debugfs.h> #include <asm/uaccess.h> #include <asm/page.h> @@ -528,7 +529,7 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid) { int err = 0; -#ifdef CONFIG_JBD_DEBUG +#ifdef CONFIG_JBD2_DEBUG spin_lock(&journal->j_state_lock); if (!tid_geq(journal->j_commit_request, tid)) { printk(KERN_EMERG @@ -1679,7 +1680,7 @@ static int jbd2_journal_create_jbd_slab(size_t slab_size) * boundary. */ jbd_slab[i] = kmem_cache_create(jbd_slab_names[i], - slab_size, slab_size, 0, NULL, NULL); + slab_size, slab_size, 0, NULL); if (!jbd_slab[i]) { printk(KERN_EMERG "JBD: no memory for jbd_slab cache\n"); return -ENOMEM; @@ -1709,7 +1710,7 @@ void jbd2_slab_free(void *ptr, size_t size) * Journal_head storage management */ static struct kmem_cache *jbd2_journal_head_cache; -#ifdef CONFIG_JBD_DEBUG +#ifdef CONFIG_JBD2_DEBUG static atomic_t nr_journal_heads = ATOMIC_INIT(0); #endif @@ -1722,8 +1723,7 @@ static int journal_init_jbd2_journal_head_cache(void) sizeof(struct journal_head), 0, /* offset */ 0, /* flags */ - NULL, /* ctor */ - NULL); /* dtor */ + NULL); /* ctor */ retval = 0; if (jbd2_journal_head_cache == 0) { retval = -ENOMEM; @@ -1747,7 +1747,7 @@ static struct journal_head *journal_alloc_journal_head(void) struct journal_head *ret; static unsigned long last_warning; -#ifdef CONFIG_JBD_DEBUG +#ifdef CONFIG_JBD2_DEBUG atomic_inc(&nr_journal_heads); #endif ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS); @@ -1768,7 +1768,7 @@ static struct journal_head *journal_alloc_journal_head(void) static void journal_free_journal_head(struct journal_head *jh) { -#ifdef CONFIG_JBD_DEBUG +#ifdef CONFIG_JBD2_DEBUG atomic_dec(&nr_journal_heads); memset(jh, JBD_POISON_FREE, sizeof(*jh)); #endif @@ -1951,64 +1951,50 @@ void jbd2_journal_put_journal_head(struct journal_head *jh) } /* - * /proc tunables + * debugfs tunables */ -#if defined(CONFIG_JBD_DEBUG) -int jbd2_journal_enable_debug; +#if defined(CONFIG_JBD2_DEBUG) +u8 jbd2_journal_enable_debug; EXPORT_SYMBOL(jbd2_journal_enable_debug); #endif -#if defined(CONFIG_JBD_DEBUG) && defined(CONFIG_PROC_FS) +#if defined(CONFIG_JBD2_DEBUG) && defined(CONFIG_DEBUG_FS) -static struct proc_dir_entry *proc_jbd_debug; +#define JBD2_DEBUG_NAME "jbd2-debug" -static int read_jbd_debug(char *page, char **start, off_t off, - int count, int *eof, void *data) -{ - int ret; +struct dentry *jbd2_debugfs_dir, *jbd2_debug; - ret = sprintf(page + off, "%d\n", jbd2_journal_enable_debug); - *eof = 1; - return ret; +static void __init jbd2_create_debugfs_entry(void) +{ + jbd2_debugfs_dir = debugfs_create_dir("jbd2", NULL); + if (jbd2_debugfs_dir) + jbd2_debug = debugfs_create_u8(JBD2_DEBUG_NAME, S_IRUGO, + jbd2_debugfs_dir, + &jbd2_journal_enable_debug); } -static int write_jbd_debug(struct file *file, const char __user *buffer, - unsigned long count, void *data) +static void __exit jbd2_remove_debugfs_entry(void) { - char buf[32]; - - if (count > ARRAY_SIZE(buf) - 1) - count = ARRAY_SIZE(buf) - 1; - if (copy_from_user(buf, buffer, count)) - return -EFAULT; - buf[ARRAY_SIZE(buf) - 1] = '\0'; - jbd2_journal_enable_debug = simple_strtoul(buf, NULL, 10); - return count; + if (jbd2_debug) + debugfs_remove(jbd2_debug); + if (jbd2_debugfs_dir) + debugfs_remove(jbd2_debugfs_dir); } -#define JBD_PROC_NAME "sys/fs/jbd2-debug" +#else -static void __init create_jbd_proc_entry(void) +static void __init jbd2_create_debugfs_entry(void) { - proc_jbd_debug = create_proc_entry(JBD_PROC_NAME, 0644, NULL); - if (proc_jbd_debug) { - /* Why is this so hard? */ - proc_jbd_debug->read_proc = read_jbd_debug; - proc_jbd_debug->write_proc = write_jbd_debug; - } + do { + } while (0); } -static void __exit jbd2_remove_jbd_proc_entry(void) +static void __exit jbd2_remove_debugfs_entry(void) { - if (proc_jbd_debug) - remove_proc_entry(JBD_PROC_NAME, NULL); + do { + } while (0); } -#else - -#define create_jbd_proc_entry() do {} while (0) -#define jbd2_remove_jbd_proc_entry() do {} while (0) - #endif struct kmem_cache *jbd2_handle_cache; @@ -2019,8 +2005,7 @@ static int __init journal_init_handle_cache(void) sizeof(handle_t), 0, /* offset */ 0, /* flags */ - NULL, /* ctor */ - NULL); /* dtor */ + NULL); /* ctor */ if (jbd2_handle_cache == NULL) { printk(KERN_EMERG "JBD: failed to create handle cache\n"); return -ENOMEM; @@ -2067,18 +2052,18 @@ static int __init journal_init(void) ret = journal_init_caches(); if (ret != 0) jbd2_journal_destroy_caches(); - create_jbd_proc_entry(); + jbd2_create_debugfs_entry(); return ret; } static void __exit journal_exit(void) { -#ifdef CONFIG_JBD_DEBUG +#ifdef CONFIG_JBD2_DEBUG int n = atomic_read(&nr_journal_heads); if (n) printk(KERN_EMERG "JBD: leaked %d journal_heads!\n", n); #endif - jbd2_remove_jbd_proc_entry(); + jbd2_remove_debugfs_entry(); jbd2_journal_destroy_caches(); } |