#include <linux/jbd2.h>
#include <linux/errno.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/poison.h>
#include <linux/proc_fs.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <asm/page.h>
static int journal_convert_superblock_v1(journal_t *, journal_superblock_t *);
static void __journal_abort_soft (journal_t *journal, int errno);
-static int jbd2_journal_create_jbd_slab(size_t slab_size);
/*
* Helper function used to manage commit timeouts
return 0;
}
-static void jbd2_journal_start_thread(journal_t *journal)
+static int jbd2_journal_start_thread(journal_t *journal)
{
- kthread_run(kjournald2, journal, "kjournald2");
- wait_event(journal->j_wait_done_commit, journal->j_task != 0);
+ struct task_struct *t;
+
+ t = kthread_run(kjournald2, journal, "kjournald2");
+ if (IS_ERR(t))
+ return PTR_ERR(t);
+
+ wait_event(journal->j_wait_done_commit, journal->j_task != NULL);
+ return 0;
}
static void journal_kill_thread(journal_t *journal)
while (journal->j_task) {
wake_up(&journal->j_wait_commit);
spin_unlock(&journal->j_state_lock);
- wait_event(journal->j_wait_done_commit, journal->j_task == 0);
+ wait_event(journal->j_wait_done_commit, journal->j_task == NULL);
spin_lock(&journal->j_state_lock);
}
spin_unlock(&journal->j_state_lock);
char *tmp;
jbd_unlock_bh_state(bh_in);
- tmp = jbd2_slab_alloc(bh_in->b_size, GFP_NOFS);
+ tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
jbd_lock_bh_state(bh_in);
if (jh_in->b_frozen_data) {
- jbd2_slab_free(tmp, bh_in->b_size);
+ jbd2_free(tmp, bh_in->b_size);
goto repeat;
}
{
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
return jbd2_journal_add_journal_head(bh);
}
+struct jbd2_stats_proc_session {
+ journal_t *journal;
+ struct transaction_stats_s *stats;
+ int start;
+ int max;
+};
+
+static void *jbd2_history_skip_empty(struct jbd2_stats_proc_session *s,
+ struct transaction_stats_s *ts,
+ int first)
+{
+ if (ts == s->stats + s->max)
+ ts = s->stats;
+ if (!first && ts == s->stats + s->start)
+ return NULL;
+ while (ts->ts_type == 0) {
+ ts++;
+ if (ts == s->stats + s->max)
+ ts = s->stats;
+ if (ts == s->stats + s->start)
+ return NULL;
+ }
+ return ts;
+
+}
+
+static void *jbd2_seq_history_start(struct seq_file *seq, loff_t *pos)
+{
+ struct jbd2_stats_proc_session *s = seq->private;
+ struct transaction_stats_s *ts;
+ int l = *pos;
+
+ if (l == 0)
+ return SEQ_START_TOKEN;
+ ts = jbd2_history_skip_empty(s, s->stats + s->start, 1);
+ if (!ts)
+ return NULL;
+ l--;
+ while (l) {
+ ts = jbd2_history_skip_empty(s, ++ts, 0);
+ if (!ts)
+ break;
+ l--;
+ }
+ return ts;
+}
+
+static void *jbd2_seq_history_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct jbd2_stats_proc_session *s = seq->private;
+ struct transaction_stats_s *ts = v;
+
+ ++*pos;
+ if (v == SEQ_START_TOKEN)
+ return jbd2_history_skip_empty(s, s->stats + s->start, 1);
+ else
+ return jbd2_history_skip_empty(s, ++ts, 0);
+}
+
+static int jbd2_seq_history_show(struct seq_file *seq, void *v)
+{
+ struct transaction_stats_s *ts = v;
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, "%-4s %-5s %-5s %-5s %-5s %-5s %-5s %-6s %-5s "
+ "%-5s %-5s %-5s %-5s %-5s\n", "R/C", "tid",
+ "wait", "run", "lock", "flush", "log", "hndls",
+ "block", "inlog", "ctime", "write", "drop",
+ "close");
+ return 0;
+ }
+ if (ts->ts_type == JBD2_STATS_RUN)
+ seq_printf(seq, "%-4s %-5lu %-5u %-5u %-5u %-5u %-5u "
+ "%-6lu %-5lu %-5lu\n", "R", ts->ts_tid,
+ jiffies_to_msecs(ts->u.run.rs_wait),
+ jiffies_to_msecs(ts->u.run.rs_running),
+ jiffies_to_msecs(ts->u.run.rs_locked),
+ jiffies_to_msecs(ts->u.run.rs_flushing),
+ jiffies_to_msecs(ts->u.run.rs_logging),
+ ts->u.run.rs_handle_count,
+ ts->u.run.rs_blocks,
+ ts->u.run.rs_blocks_logged);
+ else if (ts->ts_type == JBD2_STATS_CHECKPOINT)
+ seq_printf(seq, "%-4s %-5lu %48s %-5u %-5lu %-5lu %-5lu\n",
+ "C", ts->ts_tid, " ",
+ jiffies_to_msecs(ts->u.chp.cs_chp_time),
+ ts->u.chp.cs_written, ts->u.chp.cs_dropped,
+ ts->u.chp.cs_forced_to_close);
+ else
+ J_ASSERT(0);
+ return 0;
+}
+
+static void jbd2_seq_history_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations jbd2_seq_history_ops = {
+ .start = jbd2_seq_history_start,
+ .next = jbd2_seq_history_next,
+ .stop = jbd2_seq_history_stop,
+ .show = jbd2_seq_history_show,
+};
+
+static int jbd2_seq_history_open(struct inode *inode, struct file *file)
+{
+ journal_t *journal = PDE(inode)->data;
+ struct jbd2_stats_proc_session *s;
+ int rc, size;
+
+ s = kmalloc(sizeof(*s), GFP_KERNEL);
+ if (s == NULL)
+ return -ENOMEM;
+ size = sizeof(struct transaction_stats_s) * journal->j_history_max;
+ s->stats = kmalloc(size, GFP_KERNEL);
+ if (s->stats == NULL) {
+ kfree(s);
+ return -ENOMEM;
+ }
+ spin_lock(&journal->j_history_lock);
+ memcpy(s->stats, journal->j_history, size);
+ s->max = journal->j_history_max;
+ s->start = journal->j_history_cur % s->max;
+ spin_unlock(&journal->j_history_lock);
+
+ rc = seq_open(file, &jbd2_seq_history_ops);
+ if (rc == 0) {
+ struct seq_file *m = file->private_data;
+ m->private = s;
+ } else {
+ kfree(s->stats);
+ kfree(s);
+ }
+ return rc;
+
+}
+
+static int jbd2_seq_history_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct jbd2_stats_proc_session *s = seq->private;
+
+ kfree(s->stats);
+ kfree(s);
+ return seq_release(inode, file);
+}
+
+static struct file_operations jbd2_seq_history_fops = {
+ .owner = THIS_MODULE,
+ .open = jbd2_seq_history_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = jbd2_seq_history_release,
+};
+
+static void *jbd2_seq_info_start(struct seq_file *seq, loff_t *pos)
+{
+ return *pos ? NULL : SEQ_START_TOKEN;
+}
+
+static void *jbd2_seq_info_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return NULL;
+}
+
+static int jbd2_seq_info_show(struct seq_file *seq, void *v)
+{
+ struct jbd2_stats_proc_session *s = seq->private;
+
+ if (v != SEQ_START_TOKEN)
+ return 0;
+ seq_printf(seq, "%lu transaction, each upto %u blocks\n",
+ s->stats->ts_tid,
+ s->journal->j_max_transaction_buffers);
+ if (s->stats->ts_tid == 0)
+ return 0;
+ seq_printf(seq, "average: \n %ums waiting for transaction\n",
+ jiffies_to_msecs(s->stats->u.run.rs_wait / s->stats->ts_tid));
+ seq_printf(seq, " %ums running transaction\n",
+ jiffies_to_msecs(s->stats->u.run.rs_running / s->stats->ts_tid));
+ seq_printf(seq, " %ums transaction was being locked\n",
+ jiffies_to_msecs(s->stats->u.run.rs_locked / s->stats->ts_tid));
+ seq_printf(seq, " %ums flushing data (in ordered mode)\n",
+ jiffies_to_msecs(s->stats->u.run.rs_flushing / s->stats->ts_tid));
+ seq_printf(seq, " %ums logging transaction\n",
+ jiffies_to_msecs(s->stats->u.run.rs_logging / s->stats->ts_tid));
+ seq_printf(seq, " %lu handles per transaction\n",
+ s->stats->u.run.rs_handle_count / s->stats->ts_tid);
+ seq_printf(seq, " %lu blocks per transaction\n",
+ s->stats->u.run.rs_blocks / s->stats->ts_tid);
+ seq_printf(seq, " %lu logged blocks per transaction\n",
+ s->stats->u.run.rs_blocks_logged / s->stats->ts_tid);
+ return 0;
+}
+
+static void jbd2_seq_info_stop(struct seq_file *seq, void *v)
+{
+}
+
+static struct seq_operations jbd2_seq_info_ops = {
+ .start = jbd2_seq_info_start,
+ .next = jbd2_seq_info_next,
+ .stop = jbd2_seq_info_stop,
+ .show = jbd2_seq_info_show,
+};
+
+static int jbd2_seq_info_open(struct inode *inode, struct file *file)
+{
+ journal_t *journal = PDE(inode)->data;
+ struct jbd2_stats_proc_session *s;
+ int rc, size;
+
+ s = kmalloc(sizeof(*s), GFP_KERNEL);
+ if (s == NULL)
+ return -ENOMEM;
+ size = sizeof(struct transaction_stats_s);
+ s->stats = kmalloc(size, GFP_KERNEL);
+ if (s->stats == NULL) {
+ kfree(s);
+ return -ENOMEM;
+ }
+ spin_lock(&journal->j_history_lock);
+ memcpy(s->stats, &journal->j_stats, size);
+ s->journal = journal;
+ spin_unlock(&journal->j_history_lock);
+
+ rc = seq_open(file, &jbd2_seq_info_ops);
+ if (rc == 0) {
+ struct seq_file *m = file->private_data;
+ m->private = s;
+ } else {
+ kfree(s->stats);
+ kfree(s);
+ }
+ return rc;
+
+}
+
+static int jbd2_seq_info_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct jbd2_stats_proc_session *s = seq->private;
+ kfree(s->stats);
+ kfree(s);
+ return seq_release(inode, file);
+}
+
+static struct file_operations jbd2_seq_info_fops = {
+ .owner = THIS_MODULE,
+ .open = jbd2_seq_info_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = jbd2_seq_info_release,
+};
+
+static struct proc_dir_entry *proc_jbd2_stats;
+
+static void jbd2_stats_proc_init(journal_t *journal)
+{
+ char name[BDEVNAME_SIZE];
+
+ snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
+ journal->j_proc_entry = proc_mkdir(name, proc_jbd2_stats);
+ if (journal->j_proc_entry) {
+ struct proc_dir_entry *p;
+ p = create_proc_entry("history", S_IRUGO,
+ journal->j_proc_entry);
+ if (p) {
+ p->proc_fops = &jbd2_seq_history_fops;
+ p->data = journal;
+ p = create_proc_entry("info", S_IRUGO,
+ journal->j_proc_entry);
+ if (p) {
+ p->proc_fops = &jbd2_seq_info_fops;
+ p->data = journal;
+ }
+ }
+ }
+}
+
+static void jbd2_stats_proc_exit(journal_t *journal)
+{
+ char name[BDEVNAME_SIZE];
+
+ snprintf(name, sizeof(name) - 1, "%s", bdevname(journal->j_dev, name));
+ remove_proc_entry("info", journal->j_proc_entry);
+ remove_proc_entry("history", journal->j_proc_entry);
+ remove_proc_entry(name, proc_jbd2_stats);
+}
+
+static void journal_init_stats(journal_t *journal)
+{
+ int size;
+
+ if (!proc_jbd2_stats)
+ return;
+
+ journal->j_history_max = 100;
+ size = sizeof(struct transaction_stats_s) * journal->j_history_max;
+ journal->j_history = kzalloc(size, GFP_KERNEL);
+ if (!journal->j_history) {
+ journal->j_history_max = 0;
+ return;
+ }
+ spin_lock_init(&journal->j_history_lock);
+}
+
/*
* Management for journal control blocks: functions to create and
* destroy journal_t structures, and to initialise and read existing
journal_t *journal;
int err;
- journal = jbd_kmalloc(sizeof(*journal), GFP_KERNEL);
+ journal = kzalloc(sizeof(*journal), GFP_KERNEL|__GFP_NOFAIL);
if (!journal)
goto fail;
- memset(journal, 0, sizeof(*journal));
init_waitqueue_head(&journal->j_wait_transaction_locked);
init_waitqueue_head(&journal->j_wait_logspace);
spin_lock_init(&journal->j_list_lock);
spin_lock_init(&journal->j_state_lock);
- journal->j_commit_interval = (HZ * JBD_DEFAULT_MAX_COMMIT_AGE);
+ journal->j_commit_interval = (HZ * JBD2_DEFAULT_MAX_COMMIT_AGE);
/* The journal is marked for error until we succeed with recovery! */
journal->j_flags = JBD2_ABORT;
kfree(journal);
goto fail;
}
+
+ journal_init_stats(journal);
+
return journal;
fail:
return NULL;
journal->j_fs_dev = fs_dev;
journal->j_blk_offset = start;
journal->j_maxlen = len;
+ jbd2_stats_proc_init(journal);
bh = __getblk(journal->j_dev, start, journal->j_blocksize);
J_ASSERT(bh != NULL);
journal->j_maxlen = inode->i_size >> inode->i_sb->s_blocksize_bits;
journal->j_blocksize = inode->i_sb->s_blocksize;
+ jbd2_stats_proc_init(journal);
/* journal descriptor can store up to n blocks -bzzz */
n = journal->j_blocksize / sizeof(journal_block_tag_t);
/* Add the dynamic fields and write it to disk. */
jbd2_journal_update_superblock(journal, 1);
- jbd2_journal_start_thread(journal);
- return 0;
+ return jbd2_journal_start_thread(journal);
}
/**
}
}
- /*
- * Create a slab for this blocksize
- */
- err = jbd2_journal_create_jbd_slab(be32_to_cpu(sb->s_blocksize));
- if (err)
- return err;
-
/* Let the recovery code check whether it needs to recover any
* data from the journal. */
if (jbd2_journal_recover(journal))
brelse(journal->j_sb_buffer);
}
+ if (journal->j_proc_entry)
+ jbd2_stats_proc_exit(journal);
if (journal->j_inode)
iput(journal->j_inode);
if (journal->j_revoke)
return 1;
}
+/*
+ * jbd2_journal_clear_features () - Clear a given journal feature in the
+ * superblock
+ * @journal: Journal to act on.
+ * @compat: bitmask of compatible features
+ * @ro: bitmask of features that force read-only mount
+ * @incompat: bitmask of incompatible features
+ *
+ * Clear a given journal feature as present on the
+ * superblock.
+ */
+void jbd2_journal_clear_features(journal_t *journal, unsigned long compat,
+ unsigned long ro, unsigned long incompat)
+{
+ journal_superblock_t *sb;
+
+ jbd_debug(1, "Clear features 0x%lx/0x%lx/0x%lx\n",
+ compat, ro, incompat);
+
+ sb = journal->j_superblock;
+
+ sb->s_feature_compat &= ~cpu_to_be32(compat);
+ sb->s_feature_ro_compat &= ~cpu_to_be32(ro);
+ sb->s_feature_incompat &= ~cpu_to_be32(incompat);
+}
+EXPORT_SYMBOL(jbd2_journal_clear_features);
/**
* int jbd2_journal_update_format () - Update on-disk journal structure.
size_t journal_tag_bytes(journal_t *journal)
{
if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT))
- return JBD_TAG_SIZE64;
+ return JBD2_TAG_SIZE64;
else
- return JBD_TAG_SIZE32;
-}
-
-/*
- * Simple support for retrying memory allocations. Introduced to help to
- * debug different VM deadlock avoidance strategies.
- */
-void * __jbd2_kmalloc (const char *where, size_t size, gfp_t flags, int retry)
-{
- return kmalloc(size, flags | (retry ? __GFP_NOFAIL : 0));
-}
-
-/*
- * jbd slab management: create 1k, 2k, 4k, 8k slabs as needed
- * and allocate frozen and commit buffers from these slabs.
- *
- * Reason for doing this is to avoid, SLAB_DEBUG - since it could
- * cause bh to cross page boundary.
- */
-
-#define JBD_MAX_SLABS 5
-#define JBD_SLAB_INDEX(size) (size >> 11)
-
-static struct kmem_cache *jbd_slab[JBD_MAX_SLABS];
-static const char *jbd_slab_names[JBD_MAX_SLABS] = {
- "jbd2_1k", "jbd2_2k", "jbd2_4k", NULL, "jbd2_8k"
-};
-
-static void jbd2_journal_destroy_jbd_slabs(void)
-{
- int i;
-
- for (i = 0; i < JBD_MAX_SLABS; i++) {
- if (jbd_slab[i])
- kmem_cache_destroy(jbd_slab[i]);
- jbd_slab[i] = NULL;
- }
-}
-
-static int jbd2_journal_create_jbd_slab(size_t slab_size)
-{
- int i = JBD_SLAB_INDEX(slab_size);
-
- BUG_ON(i >= JBD_MAX_SLABS);
-
- /*
- * Check if we already have a slab created for this size
- */
- if (jbd_slab[i])
- return 0;
-
- /*
- * Create a slab and force alignment to be same as slabsize -
- * this will make sure that allocations won't cross the page
- * boundary.
- */
- jbd_slab[i] = kmem_cache_create(jbd_slab_names[i],
- slab_size, slab_size, 0, NULL, NULL);
- if (!jbd_slab[i]) {
- printk(KERN_EMERG "JBD: no memory for jbd_slab cache\n");
- return -ENOMEM;
- }
- return 0;
-}
-
-void * jbd2_slab_alloc(size_t size, gfp_t flags)
-{
- int idx;
-
- idx = JBD_SLAB_INDEX(size);
- BUG_ON(jbd_slab[idx] == NULL);
- return kmem_cache_alloc(jbd_slab[idx], flags | __GFP_NOFAIL);
-}
-
-void jbd2_slab_free(void *ptr, size_t size)
-{
- int idx;
-
- idx = JBD_SLAB_INDEX(size);
- BUG_ON(jbd_slab[idx] == NULL);
- kmem_cache_free(jbd_slab[idx], ptr);
+ return JBD2_TAG_SIZE32;
}
/*
* 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
{
int retval;
- J_ASSERT(jbd2_journal_head_cache == 0);
+ J_ASSERT(jbd2_journal_head_cache == NULL);
jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
sizeof(struct journal_head),
0, /* offset */
- 0, /* flags */
- NULL, /* ctor */
- NULL); /* dtor */
+ SLAB_TEMPORARY, /* flags */
+ NULL); /* ctor */
retval = 0;
- if (jbd2_journal_head_cache == 0) {
+ if (!jbd2_journal_head_cache) {
retval = -ENOMEM;
printk(KERN_EMERG "JBD: no memory for journal_head cache\n");
}
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);
- if (ret == 0) {
+ if (!ret) {
jbd_debug(1, "out of memory for journal_head\n");
if (time_after(jiffies, last_warning + 5*HZ)) {
printk(KERN_NOTICE "ENOMEM in %s, retrying.\n",
__FUNCTION__);
last_warning = jiffies;
}
- while (ret == 0) {
+ while (!ret) {
yield();
ret = kmem_cache_alloc(jbd2_journal_head_cache, GFP_NOFS);
}
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));
+ memset(jh, JBD2_POISON_FREE, sizeof(*jh));
#endif
kmem_cache_free(jbd2_journal_head_cache, jh);
}
printk(KERN_WARNING "%s: freeing "
"b_frozen_data\n",
__FUNCTION__);
- jbd2_slab_free(jh->b_frozen_data, bh->b_size);
+ jbd2_free(jh->b_frozen_data, bh->b_size);
}
if (jh->b_committed_data) {
printk(KERN_WARNING "%s: freeing "
"b_committed_data\n",
__FUNCTION__);
- jbd2_slab_free(jh->b_committed_data, bh->b_size);
+ jbd2_free(jh->b_committed_data, bh->b_size);
}
bh->b_private = NULL;
jh->b_bh = NULL; /* debug, really */
}
/*
- * /proc tunables
+ * debugfs tunables
*/
-#if defined(CONFIG_JBD_DEBUG)
-int jbd2_journal_enable_debug;
+#ifdef CONFIG_JBD2_DEBUG
+u8 jbd2_journal_enable_debug __read_mostly;
EXPORT_SYMBOL(jbd2_journal_enable_debug);
-#endif
-#if defined(CONFIG_JBD_DEBUG) && defined(CONFIG_PROC_FS)
+#define JBD2_DEBUG_NAME "jbd2-debug"
-static struct proc_dir_entry *proc_jbd_debug;
+static struct dentry *jbd2_debugfs_dir;
+static struct dentry *jbd2_debug;
-static int read_jbd_debug(char *page, char **start, off_t off,
- int count, int *eof, void *data)
+static void __init jbd2_create_debugfs_entry(void)
{
- int ret;
+ 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);
+}
- ret = sprintf(page + off, "%d\n", jbd2_journal_enable_debug);
- *eof = 1;
- return ret;
+static void __exit jbd2_remove_debugfs_entry(void)
+{
+ debugfs_remove(jbd2_debug);
+ debugfs_remove(jbd2_debugfs_dir);
}
-static int write_jbd_debug(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
+#else
+
+static void __init jbd2_create_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;
+static void __exit jbd2_remove_debugfs_entry(void)
+{
}
-#define JBD_PROC_NAME "sys/fs/jbd2-debug"
+#endif
+
+#ifdef CONFIG_PROC_FS
-static void __init create_jbd_proc_entry(void)
+#define JBD2_STATS_PROC_NAME "fs/jbd2"
+
+static void __init jbd2_create_jbd_stats_proc_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;
- }
+ proc_jbd2_stats = proc_mkdir(JBD2_STATS_PROC_NAME, NULL);
}
-static void __exit jbd2_remove_jbd_proc_entry(void)
+static void __exit jbd2_remove_jbd_stats_proc_entry(void)
{
- if (proc_jbd_debug)
- remove_proc_entry(JBD_PROC_NAME, NULL);
+ if (proc_jbd2_stats)
+ remove_proc_entry(JBD2_STATS_PROC_NAME, NULL);
}
#else
-#define create_jbd_proc_entry() do {} while (0)
-#define jbd2_remove_jbd_proc_entry() do {} while (0)
+#define jbd2_create_jbd_stats_proc_entry() do {} while (0)
+#define jbd2_remove_jbd_stats_proc_entry() do {} while (0)
#endif
jbd2_handle_cache = kmem_cache_create("jbd2_journal_handle",
sizeof(handle_t),
0, /* offset */
- 0, /* flags */
- NULL, /* ctor */
- NULL); /* dtor */
+ SLAB_TEMPORARY, /* flags */
+ NULL); /* ctor */
if (jbd2_handle_cache == NULL) {
printk(KERN_EMERG "JBD: failed to create handle cache\n");
return -ENOMEM;
jbd2_journal_destroy_revoke_caches();
jbd2_journal_destroy_jbd2_journal_head_cache();
jbd2_journal_destroy_handle_cache();
- jbd2_journal_destroy_jbd_slabs();
}
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();
+ jbd2_create_jbd_stats_proc_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_remove_jbd_stats_proc_entry();
jbd2_journal_destroy_caches();
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff