#ifdef CONFIG_MTD_UBI_DEBUG
#include "ubi.h"
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
#include <linux/module.h>
-#include <linux/moduleparam.h>
-
-unsigned int ubi_msg_flags;
-unsigned int ubi_chk_flags;
-unsigned int ubi_tst_flags;
-
-module_param_named(debug_msgs, ubi_msg_flags, uint, S_IRUGO | S_IWUSR);
-module_param_named(debug_chks, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
-module_param_named(debug_tsts, ubi_chk_flags, uint, S_IRUGO | S_IWUSR);
-
-MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
-MODULE_PARM_DESC(debug_chks, "Debug check flags");
-MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
/**
* ubi_dbg_dump_ec_hdr - dump an erase counter header.
{
printk(KERN_DEBUG "Volume identifier header dump:\n");
printk(KERN_DEBUG "\tmagic %08x\n", be32_to_cpu(vid_hdr->magic));
- printk(KERN_DEBUG "\tversion %d\n", (int)vid_hdr->version);
- printk(KERN_DEBUG "\tvol_type %d\n", (int)vid_hdr->vol_type);
- printk(KERN_DEBUG "\tcopy_flag %d\n", (int)vid_hdr->copy_flag);
- printk(KERN_DEBUG "\tcompat %d\n", (int)vid_hdr->compat);
- printk(KERN_DEBUG "\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id));
- printk(KERN_DEBUG "\tlnum %d\n", be32_to_cpu(vid_hdr->lnum));
- printk(KERN_DEBUG "\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size));
- printk(KERN_DEBUG "\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs));
- printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad));
+ printk(KERN_DEBUG "\tversion %d\n", (int)vid_hdr->version);
+ printk(KERN_DEBUG "\tvol_type %d\n", (int)vid_hdr->vol_type);
+ printk(KERN_DEBUG "\tcopy_flag %d\n", (int)vid_hdr->copy_flag);
+ printk(KERN_DEBUG "\tcompat %d\n", (int)vid_hdr->compat);
+ printk(KERN_DEBUG "\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id));
+ printk(KERN_DEBUG "\tlnum %d\n", be32_to_cpu(vid_hdr->lnum));
+ printk(KERN_DEBUG "\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size));
+ printk(KERN_DEBUG "\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs));
+ printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad));
printk(KERN_DEBUG "\tsqnum %llu\n",
(unsigned long long)be64_to_cpu(vid_hdr->sqnum));
printk(KERN_DEBUG "\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc));
return;
}
+/**
+ * ubi_debugging_init_dev - initialize debugging for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function initializes debugging-related data for UBI device @ubi.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubi_debugging_init_dev(struct ubi_device *ubi)
+{
+ ubi->dbg = kzalloc(sizeof(struct ubi_debug_info), GFP_KERNEL);
+ if (!ubi->dbg)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * ubi_debugging_exit_dev - free debugging data for an UBI device.
+ * @ubi: UBI device description object
+ */
+void ubi_debugging_exit_dev(struct ubi_device *ubi)
+{
+ kfree(ubi->dbg);
+}
+
+/*
+ * Root directory for UBI stuff in debugfs. Contains sub-directories which
+ * contain the stuff specific to particular UBI devices.
+ */
+static struct dentry *dfs_rootdir;
+
+/**
+ * ubi_debugfs_init - create UBI debugfs directory.
+ *
+ * Create UBI debugfs directory. Returns zero in case of success and a negative
+ * error code in case of failure.
+ */
+int ubi_debugfs_init(void)
+{
+ dfs_rootdir = debugfs_create_dir("ubi", NULL);
+ if (IS_ERR_OR_NULL(dfs_rootdir)) {
+ int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir);
+
+ ubi_err("cannot create \"ubi\" debugfs directory, error %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * ubi_debugfs_exit - remove UBI debugfs directory.
+ */
+void ubi_debugfs_exit(void)
+{
+ debugfs_remove(dfs_rootdir);
+}
+
+/* Read an UBI debugfs file */
+static ssize_t dfs_file_read(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ unsigned long ubi_num = (unsigned long)file->private_data;
+ struct dentry *dent = file->f_path.dentry;
+ struct ubi_device *ubi;
+ struct ubi_debug_info *d;
+ char buf[3];
+ int val;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+ d = ubi->dbg;
+
+ if (dent == d->dfs_chk_gen)
+ val = d->chk_gen;
+ else if (dent == d->dfs_chk_io)
+ val = d->chk_io;
+ else if (dent == d->dfs_disable_bgt)
+ val = d->disable_bgt;
+ else if (dent == d->dfs_emulate_bitflips)
+ val = d->emulate_bitflips;
+ else if (dent == d->dfs_emulate_io_failures)
+ val = d->emulate_io_failures;
+ else {
+ count = -EINVAL;
+ goto out;
+ }
+
+ if (val)
+ buf[0] = '1';
+ else
+ buf[0] = '0';
+ buf[1] = '\n';
+ buf[2] = 0x00;
+
+ count = simple_read_from_buffer(user_buf, count, ppos, buf, 2);
+
+out:
+ ubi_put_device(ubi);
+ return count;
+}
+
+/* Write an UBI debugfs file */
+static ssize_t dfs_file_write(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ unsigned long ubi_num = (unsigned long)file->private_data;
+ struct dentry *dent = file->f_path.dentry;
+ struct ubi_device *ubi;
+ struct ubi_debug_info *d;
+ size_t buf_size;
+ char buf[8];
+ int val;
+
+ ubi = ubi_get_device(ubi_num);
+ if (!ubi)
+ return -ENODEV;
+ d = ubi->dbg;
+
+ buf_size = min_t(size_t, count, (sizeof(buf) - 1));
+ if (copy_from_user(buf, user_buf, buf_size)) {
+ count = -EFAULT;
+ goto out;
+ }
+
+ if (buf[0] == '1')
+ val = 1;
+ else if (buf[0] == '0')
+ val = 0;
+ else {
+ count = -EINVAL;
+ goto out;
+ }
+
+ if (dent == d->dfs_chk_gen)
+ d->chk_gen = val;
+ else if (dent == d->dfs_chk_io)
+ d->chk_io = val;
+ else if (dent == d->dfs_disable_bgt)
+ d->disable_bgt = val;
+ else if (dent == d->dfs_emulate_bitflips)
+ d->emulate_bitflips = val;
+ else if (dent == d->dfs_emulate_io_failures)
+ d->emulate_io_failures = val;
+ else
+ count = -EINVAL;
+
+out:
+ ubi_put_device(ubi);
+ return count;
+}
+
+static int default_open(struct inode *inode, struct file *file)
+{
+ if (inode->i_private)
+ file->private_data = inode->i_private;
+
+ return 0;
+}
+
+/* File operations for all UBI debugfs files */
+static const struct file_operations dfs_fops = {
+ .read = dfs_file_read,
+ .write = dfs_file_write,
+ .open = default_open,
+ .llseek = no_llseek,
+ .owner = THIS_MODULE,
+};
+
+/**
+ * ubi_debugfs_init_dev - initialize debugfs for an UBI device.
+ * @ubi: UBI device description object
+ *
+ * This function creates all debugfs files for UBI device @ubi. Returns zero in
+ * case of success and a negative error code in case of failure.
+ */
+int ubi_debugfs_init_dev(struct ubi_device *ubi)
+{
+ int err, n;
+ unsigned long ubi_num = ubi->ubi_num;
+ const char *fname;
+ struct dentry *dent;
+ struct ubi_debug_info *d = ubi->dbg;
+
+ n = snprintf(d->dfs_dir_name, UBI_DFS_DIR_LEN + 1, UBI_DFS_DIR_NAME,
+ ubi->ubi_num);
+ if (n == UBI_DFS_DIR_LEN) {
+ /* The array size is too small */
+ fname = UBI_DFS_DIR_NAME;
+ dent = ERR_PTR(-EINVAL);
+ goto out;
+ }
+
+ fname = d->dfs_dir_name;
+ dent = debugfs_create_dir(fname, dfs_rootdir);
+ if (IS_ERR_OR_NULL(dent))
+ goto out;
+ d->dfs_dir = dent;
+
+ fname = "chk_gen";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_gen = dent;
+
+ fname = "chk_io";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_chk_io = dent;
+
+ fname = "tst_disable_bgt";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_disable_bgt = dent;
+
+ fname = "tst_emulate_bitflips";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_emulate_bitflips = dent;
+
+ fname = "tst_emulate_io_failures";
+ dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num,
+ &dfs_fops);
+ if (IS_ERR_OR_NULL(dent))
+ goto out_remove;
+ d->dfs_emulate_io_failures = dent;
+
+ return 0;
+
+out_remove:
+ debugfs_remove_recursive(d->dfs_dir);
+out:
+ err = dent ? PTR_ERR(dent) : -ENODEV;
+ ubi_err("cannot create \"%s\" debugfs file or directory, error %d\n",
+ fname, err);
+ return err;
+}
+
+/**
+ * dbg_debug_exit_dev - free all debugfs files corresponding to device @ubi
+ * @ubi: UBI device description object
+ */
+void ubi_debugfs_exit_dev(struct ubi_device *ubi)
+{
+ debugfs_remove_recursive(ubi->dbg->dfs_dir);
+}
+
#endif /* CONFIG_MTD_UBI_DEBUG */
git.openpandora.org / pandora-kernel.git / blobdiff