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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-10-17 13:31:39 +0300
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2008-12-03 13:14:33 +0200
commit17c2f9f85c896b48a5d74a9155d99ec5b241a0e6 (patch)
tree9d3e38e673d1d3af650072388a671ec767d3941a /fs/ubifs/debug.c
parent5dd7cbc083f3a91fa7454125fe992826701b67bc (diff)
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UBIFS: separate debugging fields out
Introduce a new data structure which contains all debugging stuff inside. This is cleaner than having debugging stuff directly in 'c'. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'fs/ubifs/debug.c')
-rw-r--r--fs/ubifs/debug.c71
1 files changed, 55 insertions, 16 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index 510ffa0..0332a85 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -705,7 +705,7 @@ void dbg_dump_leb(const struct ubifs_info *c, int lnum)
printk(KERN_DEBUG "(pid %d) Dumping LEB %d\n", current->pid, lnum);
- sleb = ubifs_scan(c, lnum, 0, c->dbg_buf);
+ sleb = ubifs_scan(c, lnum, 0, c->dbg->buf);
if (IS_ERR(sleb)) {
ubifs_err("scan error %d", (int)PTR_ERR(sleb));
return;
@@ -2097,7 +2097,7 @@ static int simple_rand(void)
return (next >> 16) & 32767;
}
-void dbg_failure_mode_registration(struct ubifs_info *c)
+static void failure_mode_init(struct ubifs_info *c)
{
struct failure_mode_info *fmi;
@@ -2112,7 +2112,7 @@ void dbg_failure_mode_registration(struct ubifs_info *c)
spin_unlock(&fmi_lock);
}
-void dbg_failure_mode_deregistration(struct ubifs_info *c)
+static void failure_mode_exit(struct ubifs_info *c)
{
struct failure_mode_info *fmi, *tmp;
@@ -2146,42 +2146,44 @@ static int in_failure_mode(struct ubi_volume_desc *desc)
struct ubifs_info *c = dbg_find_info(desc);
if (c && dbg_failure_mode)
- return c->failure_mode;
+ return c->dbg->failure_mode;
return 0;
}
static int do_fail(struct ubi_volume_desc *desc, int lnum, int write)
{
struct ubifs_info *c = dbg_find_info(desc);
+ struct ubifs_debug_info *d;
if (!c || !dbg_failure_mode)
return 0;
- if (c->failure_mode)
+ d = c->dbg;
+ if (d->failure_mode)
return 1;
- if (!c->fail_cnt) {
+ if (!d->fail_cnt) {
/* First call - decide delay to failure */
if (chance(1, 2)) {
unsigned int delay = 1 << (simple_rand() >> 11);
if (chance(1, 2)) {
- c->fail_delay = 1;
- c->fail_timeout = jiffies +
+ d->fail_delay = 1;
+ d->fail_timeout = jiffies +
msecs_to_jiffies(delay);
dbg_rcvry("failing after %ums", delay);
} else {
- c->fail_delay = 2;
- c->fail_cnt_max = delay;
+ d->fail_delay = 2;
+ d->fail_cnt_max = delay;
dbg_rcvry("failing after %u calls", delay);
}
}
- c->fail_cnt += 1;
+ d->fail_cnt += 1;
}
/* Determine if failure delay has expired */
- if (c->fail_delay == 1) {
- if (time_before(jiffies, c->fail_timeout))
+ if (d->fail_delay == 1) {
+ if (time_before(jiffies, d->fail_timeout))
return 0;
- } else if (c->fail_delay == 2)
- if (c->fail_cnt++ < c->fail_cnt_max)
+ } else if (d->fail_delay == 2)
+ if (d->fail_cnt++ < d->fail_cnt_max)
return 0;
if (lnum == UBIFS_SB_LNUM) {
if (write) {
@@ -2239,7 +2241,7 @@ static int do_fail(struct ubi_volume_desc *desc, int lnum, int write)
dbg_rcvry("failing in bud LEB %d commit not running", lnum);
}
ubifs_err("*** SETTING FAILURE MODE ON (LEB %d) ***", lnum);
- c->failure_mode = 1;
+ d->failure_mode = 1;
dump_stack();
return 1;
}
@@ -2344,4 +2346,41 @@ int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype)
return 0;
}
+/**
+ * ubifs_debugging_init - initialize UBIFS debugging.
+ * @c: UBIFS file-system description object
+ *
+ * This function initializes debugging-related data for the file system.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_debugging_init(struct ubifs_info *c)
+{
+ c->dbg = kzalloc(sizeof(struct ubifs_debug_info), GFP_KERNEL);
+ if (!c->dbg)
+ return -ENOMEM;
+
+ c->dbg->buf = vmalloc(c->leb_size);
+ if (!c->dbg->buf)
+ goto out;
+
+ failure_mode_init(c);
+ return 0;
+
+out:
+ kfree(c->dbg);
+ return -ENOMEM;
+}
+
+/**
+ * ubifs_debugging_exit - free debugging data.
+ * @c: UBIFS file-system description object
+ */
+void ubifs_debugging_exit(struct ubifs_info *c)
+{
+ failure_mode_exit(c);
+ vfree(c->dbg->buf);
+ kfree(c->dbg);
+}
+
#endif /* CONFIG_UBIFS_FS_DEBUG */