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authorKent Overstreet <kent.overstreet@linux.dev>2024-04-03 19:15:53 -0400
committerKent Overstreet <kent.overstreet@linux.dev>2024-04-04 16:56:44 -0400
commit9fb3036fe3d9414ae32a97d01d7ccf7550e168a7 (patch)
tree7027a6d82d61d147fdd73014aaf6c0a386751cfa /fs/bcachefs/debug.c
parentbe42e4a621fee05e3299169fbb1068b473e779c2 (diff)
bcachefs: Move btree_updates to debugfs
sysfs is limited to PAGE_SIZE, and when we're debugging strange deadlocks/priority inversions we need to see the full list. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/debug.c')
-rw-r--r--fs/bcachefs/debug.c45
1 files changed, 42 insertions, 3 deletions
diff --git a/fs/bcachefs/debug.c b/fs/bcachefs/debug.c
index 7b681ae91510..cd99b7399414 100644
--- a/fs/bcachefs/debug.c
+++ b/fs/bcachefs/debug.c
@@ -13,6 +13,7 @@
#include "btree_iter.h"
#include "btree_locking.h"
#include "btree_update.h"
+#include "btree_update_interior.h"
#include "buckets.h"
#include "debug.h"
#include "error.h"
@@ -668,7 +669,7 @@ static ssize_t bch2_journal_pins_read(struct file *file, char __user *buf,
i->size = size;
i->ret = 0;
- do {
+ while (1) {
err = flush_buf(i);
if (err)
return err;
@@ -676,9 +677,12 @@ static ssize_t bch2_journal_pins_read(struct file *file, char __user *buf,
if (!i->size)
break;
+ if (done)
+ break;
+
done = bch2_journal_seq_pins_to_text(&i->buf, &c->journal, &i->iter);
i->iter++;
- } while (!done);
+ }
if (i->buf.allocation_failure)
return -ENOMEM;
@@ -693,13 +697,45 @@ static const struct file_operations journal_pins_ops = {
.read = bch2_journal_pins_read,
};
+static ssize_t bch2_btree_updates_read(struct file *file, char __user *buf,
+ size_t size, loff_t *ppos)
+{
+ struct dump_iter *i = file->private_data;
+ struct bch_fs *c = i->c;
+ int err;
+
+ i->ubuf = buf;
+ i->size = size;
+ i->ret = 0;
+
+ if (!i->iter) {
+ bch2_btree_updates_to_text(&i->buf, c);
+ i->iter++;
+ }
+
+ err = flush_buf(i);
+ if (err)
+ return err;
+
+ if (i->buf.allocation_failure)
+ return -ENOMEM;
+
+ return i->ret;
+}
+
+static const struct file_operations btree_updates_ops = {
+ .owner = THIS_MODULE,
+ .open = bch2_dump_open,
+ .release = bch2_dump_release,
+ .read = bch2_btree_updates_read,
+};
+
static int btree_transaction_stats_open(struct inode *inode, struct file *file)
{
struct bch_fs *c = inode->i_private;
struct dump_iter *i;
i = kzalloc(sizeof(struct dump_iter), GFP_KERNEL);
-
if (!i)
return -ENOMEM;
@@ -902,6 +938,9 @@ void bch2_fs_debug_init(struct bch_fs *c)
debugfs_create_file("journal_pins", 0400, c->fs_debug_dir,
c->btree_debug, &journal_pins_ops);
+ debugfs_create_file("btree_updates", 0400, c->fs_debug_dir,
+ c->btree_debug, &btree_updates_ops);
+
debugfs_create_file("btree_transaction_stats", 0400, c->fs_debug_dir,
c, &btree_transaction_stats_op);