Add a ioctl() call for nandsim information.
This information includes, nand id, backend type
and path to the file if the file backend is used
Signed-off-by: Daniel Walter <dwal...@sigma-star.at>
---
drivers/mtd/nand/nandsim.c | 65 +++++++++++++++++++++++++++++++++++++++++
include/uapi/mtd/nandsim-user.h | 11 +++++++
2 files changed, 76 insertions(+)
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index b901155..dd78fc3 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -2893,6 +2893,56 @@ out:
return ret;
}
+static void ns_put_device(struct mtd_info *);
+static int ns_get_device(struct mtd_info *);
+
+static int ns_ctrl_info_instance(struct ns_info_instance_req *req)
+{
+ struct mtd_info *nsmtd;
+ int id = req->id, ret = 0;
+ struct nand_chip *chip;
+ struct nandsim *ns;
+ struct ns_file_data *file_data;
+ char buf[NANDSIM_FILENAME_SIZE];
+ char *tmp;
+
+ if (id < 0 || id >= NANDSIM_MAX_DEVICES)
+ return -EINVAL;
+
+ mutex_lock(&ns_mtd_mutex);
+ nsmtd = ns_mtds[id];
+ if (nsmtd) {
+ ret = ns_get_device(nsmtd);
+ if (ret)
+ goto out;
+ chip = mtd_to_nand(nsmtd);
+ ns = nand_get_controller_data(chip);
+ req->no_oob = ns->no_oob;
+ memcpy(req->id_bytes, ns->ids, 8);
+ req->parts_num = ns->nbparts;
+ if (ns->bops == &ns_cachefile_bops) {
+ req->backend = NANDSIM_BACKEND_CACHEFILE;
+ } else if (ns->bops == &ns_file_bops) {
+ req->backend = NANDSIM_BACKEND_FILE;
+ file_data = ns->backend_data;
+ tmp = d_path(&file_data->file->f_path, buf,
NANDSIM_FILENAME_SIZE);
+ memcpy(req->filename, tmp, NANDSIM_FILENAME_SIZE);
+ } else if (ns->bops == &ns_ram_bops) {
+ req->backend = NANDSIM_BACKEND_RAM;
+ } else {
+ req->backend = -1;
+ }
+
+ ns_put_device(nsmtd);
+ } else {
+ ret = -EINVAL;
+ }
+out:
+ mutex_unlock(&ns_mtd_mutex);
+ return ret;
+
+}
+
static long ns_ctrl_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
@@ -2931,6 +2981,21 @@ static long ns_ctrl_ioctl(struct file *file, unsigned
int cmd,
ret = ns_ctrl_destroy_instance(&req);
break;
}
+ case NANDSIM_IOC_INFO_INSTANCE:
+ {
+ struct ns_info_instance_req req;
+
+ ret = copy_from_user(&req, argp, sizeof(struct
ns_info_instance_req));
+ if (ret) {
+ ret = -EFAULT;
+ goto out;
+ }
+ ret = ns_ctrl_info_instance(&req);
+ if (ret)
+ goto out;
+ ret = copy_to_user(argp, &req, sizeof(struct
ns_info_instance_req));
+ break;
+ }
default:
ret = -ENOTTY;
diff --git a/include/uapi/mtd/nandsim-user.h b/include/uapi/mtd/nandsim-user.h
index b52d620..a00ab2d 100644
--- a/include/uapi/mtd/nandsim-user.h
+++ b/include/uapi/mtd/nandsim-user.h
@@ -7,9 +7,11 @@
#define NANDSIM_IOC_NEW_INSTANCE _IOW(NANDSIM_IOC_MAGIC, 0, struct
ns_new_instance_req)
#define NANDSIM_IOC_DESTROY_INSTANCE _IOW(NANDSIM_IOC_MAGIC, 1, struct
ns_destroy_instance_req)
+#define NANDSIM_IOC_INFO_INSTANCE _IOW(NANDSIM_IOC_MAGIC, 2, struct
ns_info_instance_req)
#define NANDSIM_MAX_DEVICES 32
#define NANDSIM_MAX_PARTS 32
+#define NANDSIM_FILENAME_SIZE 64
enum ns_backend_type {
NANDSIM_BACKEND_RAM = 0,
@@ -99,4 +101,13 @@ struct ns_destroy_instance_req {
__s8 padding[7];
} __packed;
+struct ns_info_instance_req {
+ __s8 id;
+ __s8 no_oob;
+ __s8 id_bytes[8];
+ __s8 parts_num;
+ __s8 backend;
+ __u8 filename[NANDSIM_FILENAME_SIZE];
+} __packed;
+
#endif /* __NANDSIM_USER_H__ */
--
2.8.3
