ubiupdatevol: new applet

ubi_tools_main                                       658    1046    +388
packed_usage                                       28274   28304     +30
applet_names                                        2396    2409     +13
applet_main                                         1396    1400      +4
applet_nameofs                                       698     700      +2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 5/0 up/down: 437/0)             Total: 437 bytes

Signed-off-by: Reuben Dowle <Reuben.Dowle@navico.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 65 insertions, 4 deletions

diff --git a/miscutils/ubi_attach_detach.c b/miscutils/ubi_attach_detach.c
index e82dc3848..3f7f56e04 100644
--- a/miscutils/ubi_attach_detach.c
+++ b/miscutils/ubi_attach_detach.c
@@ -37,18 +37,27 @@
 //config:       select PLATFORM_LINUX
 //config:       help
 //config:         Resize a UBI volume.
+//config:
+//config:config UBIUPDATEVOL
+//config:       bool "ubiupdatevol"
+//config:       default y
+//config:       select PLATFORM_LINUX
+//config:       help
+//config:         Update a UBI volume.
 
 //applet:IF_UBIATTACH(APPLET_ODDNAME(ubiattach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiattach))
 //applet:IF_UBIDETACH(APPLET_ODDNAME(ubidetach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubidetach))
 //applet:IF_UBIMKVOL(APPLET_ODDNAME(ubimkvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubimkvol))
 //applet:IF_UBIRMVOL(APPLET_ODDNAME(ubirmvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirmvol))
 //applet:IF_UBIRSVOL(APPLET_ODDNAME(ubirsvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirsvol))
+//applet:IF_UBIUPDATEVOL(APPLET_ODDNAME(ubiupdatevol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiupdatevol))
 
 //kbuild:lib-$(CONFIG_UBIATTACH) += ubi_attach_detach.o
 //kbuild:lib-$(CONFIG_UBIDETACH) += ubi_attach_detach.o
 //kbuild:lib-$(CONFIG_UBIMKVOL)  += ubi_attach_detach.o
 //kbuild:lib-$(CONFIG_UBIRMVOL)  += ubi_attach_detach.o
 //kbuild:lib-$(CONFIG_UBIRSVOL)  += ubi_attach_detach.o
+//kbuild:lib-$(CONFIG_UBIUPDATEVOL) += ubi_attach_detach.o
 
 #include "libbb.h"
 #include <mtd/ubi-user.h>
@@ -66,6 +75,7 @@
 #define do_mkvol  (ENABLE_UBIMKVOL  && applet_name[3] == 'm')
 #define do_rmvol  (ENABLE_UBIRMVOL  && applet_name[4] == 'm')
 #define do_rsvol  (ENABLE_UBIRSVOL  && applet_name[4] == 's')
+#define do_update (ENABLE_UBIUPDATEVOL && applet_name[3] == 'u')
 
 //usage:#define ubiattach_trivial_usage
 //usage:       "-m MTD_NUM [-d UBI_NUM] UBI_CTRL_DEV"
@@ -85,7 +95,7 @@
 //usage:#define ubimkvol_trivial_usage
 //usage:       "UBI_DEVICE -N NAME -s SIZE"
 //usage:#define ubimkvol_full_usage "\n\n"
-//usage:       "Create UBI Volume\n"
+//usage:       "Create UBI volume\n"
 //usage:     "\nOptions:"
 //usage:     "\n        -a ALIGNMENT    Volume alignment (default 1)"
 //usage:     "\n        -n VOLID        Volume ID, if not specified, it"
@@ -124,8 +134,8 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
         int alignment = 1;
         char *type = NULL;
 
-        opt_complementary = "=1:m+:d+:n+:s+:a+";
-        opts = getopt32(argv, "m:d:n:N:s:a:t:",
+        opt_complementary = "-1:m+:d+:n+:s+:a+";
+        opts = getopt32(argv, "m:d:n:N:s:a:t::",
                         &mtd_num, &dev_num, &vol_id,
                         &vol_name, &size_bytes, &alignment, &type
         );
@@ -166,7 +176,7 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
 
                 memset(&req, 0, sizeof(req));
                 req.vol_id = vol_id;
-                if (opts & OPTION_t) {
+                if ((opts & OPTION_t) && type) {
                         if (type[0] == 's')
                                 req.vol_type = UBI_STATIC_VOLUME;
                         else
@@ -199,6 +209,57 @@ int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
                 req.vol_id = vol_id;
 
                 xioctl(fd, UBI_IOCRSVOL, &req);
+        } else
+        if (do_update) {
+                long long bytes;
+
+                if (opts & OPTION_t) {
+                        // truncate the volume by starting an update for size 0
+                        bytes = 0;
+                        xioctl(fd, UBI_IOCVOLUP, &bytes);
+                }
+                else {
+                        struct stat st;
+                        char buf[sizeof("/sys/class/ubi/ubi%d_%d/usable_eb_size") + 2 * sizeof(int)*3];
+                        int input_fd;
+                        unsigned ubinum, volnum;
+                        unsigned leb_size;
+                        ssize_t len;
+                        char *input_data;
+
+                        // Make assumption that device not is in normal format.
+                        // Removes need for scanning sysfs tree as full libubi does
+                        if (sscanf(ubi_ctrl, "/dev/ubi%u_%u", &ubinum, &volnum) != 2)
+                                bb_error_msg_and_die("%s volume node not in correct format", "UBI");
+
+                        sprintf(buf, "/sys/class/ubi/ubi%u_%u/usable_eb_size", ubinum, volnum);
+                        if (open_read_close(buf, buf, sizeof(buf)) <= 0)
+                                bb_error_msg_and_die("%s could not get LEB size", "UBI");
+                        if (sscanf(buf, "%u", &leb_size) != 1)
+                                bb_error_msg_and_die("%s could not get LEB size", "UBI");
+
+                        if (opts & OPTION_s) {
+                                input_fd = 0;
+                        } else {
+                                if (!argv[optind+1])
+                                        bb_show_usage();
+                                xstat(argv[optind+1], &st);
+                                size_bytes = st.st_size;
+                                input_fd = xopen(argv[optind+1], O_RDONLY);
+                        }
+
+                        bytes = size_bytes;
+                        xioctl(fd, UBI_IOCVOLUP, &bytes);
+
+                        input_data = xmalloc(leb_size);
+                        while ((len = full_read(input_fd, input_data, leb_size)) > 0) {
+                                xwrite(fd, input_data, len);
+                        }
+                        if (len < 0)
+                                bb_error_msg_and_die("%s volume update failed", "UBI");
+                        if (ENABLE_FEATURE_CLEAN_UP)
+                                close(input_fd);
+                }
         }
 
         if (ENABLE_FEATURE_CLEAN_UP)