diff options
Diffstat (limited to 'meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch')
| -rw-r--r-- | meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch b/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch new file mode 100644 index 0000000000..6d81d83578 --- /dev/null +++ b/meta-initramfs/recipes-bsp/kexecboot/files/0004-kexecboot.c-workaround-for-absolute-kernel-and-initr.patch @@ -0,0 +1,135 @@ +From de9a6284df8add6ec03e1d9981d0b6d0595bbc69 Mon Sep 17 00:00:00 2001 +From: Andrea Adami <andrea.adami@gmail.com> +Date: Mon, 10 Nov 2014 23:37:23 +0100 +Subject: [PATCH 4/4] kexecboot.c: workaround for absolute kernel and initrd + symlinks + +Add MOUNTPOINT prefix if the kernel/initrd symlinks start with '/'. +Do nothing if the path is a relative symbolic link or not a symlink. + +Fix following situation: + +root@mizar:/var/tmp# ls -al boot/ +total 2076 +drwxr-xr-x 2 root root 4096 lug 5 01:38 . +drwxrwxrwt 4 root root 4096 lug 5 12:26 .. +-rw-r--r-- 1 root root 831 lug 5 01:24 boot.cfg +-rw-r--r-- 1 root root 1322 lug 5 01:24 icon.xpm +lrwxrwxrwx 1 root root 34 lug 5 12:26 zImage -> +/boot/zImage-3.14.5-yocto-standard +-rw-r--r-- 1 root root 2106832 lug 5 01:20 zImage-3.14.5-yocto-standard + +Cannot open `/mnt/boot/zImage': No such file or directory +Nothing has been loaded! + +Signed-off-by: Andrea Adami <andrea.adami@gmail.com> +--- + kexecboot.c | 53 ++++++++++++++++++++++++++++++++++++++++++++--------- + 1 file changed, 44 insertions(+), 9 deletions(-) + +diff --git a/kexecboot.c b/kexecboot.c +index 7268d6b..8a7a7d2 100644 +--- a/kexecboot.c ++++ b/kexecboot.c +@@ -208,11 +208,16 @@ void start_kernel(struct params_t *params, int choice) + const char *load_argv[] = { NULL, "-l", NULL, NULL, NULL, NULL }; + const char *exec_argv[] = { NULL, "-e", NULL, NULL}; + +- char *cmdline_arg = NULL, *initrd_arg = NULL; ++ char *cmdline_arg = NULL, *initrd_arg = NULL, *kernel_arg = NULL; + int n, idx, u; + struct stat sinfo; + struct boot_item_t *item; + ++ /* buffer for readlink (could be truncated) */ ++ char buf[512]; ++ int len; ++ ++ + item = params->bootcfg->list[choice]; + + exec_argv[0] = kexec_path; +@@ -306,10 +311,17 @@ void start_kernel(struct params_t *params, int choice) + } + } + ++ /* Mount boot device */ ++ if ( -1 == mount(mount_dev, mount_point, mount_fstype, ++ MS_RDONLY, NULL) ) { ++ perror("Can't mount boot device"); ++ exit(-1); ++ } ++ + /* fill '--initrd' option */ + if (item->initrd) { + /* allocate space */ +- n = sizeof(str_initrd_start) + strlen(item->initrd); ++ n = sizeof(str_initrd_start) + strlen(item->initrd) + 1 + sizeof(mount_point) + sizeof(buf); + + initrd_arg = (char *)malloc(n); + if (NULL == initrd_arg) { +@@ -317,24 +329,46 @@ void start_kernel(struct params_t *params, int choice) + } else { + strcpy(initrd_arg, str_initrd_start); /* --initrd= */ + strcat(initrd_arg, item->initrd); ++ ++ if ((len = readlink(item->initrd, buf, sizeof(buf)-1)) != -1) { ++ buf[len] = '\0'; ++ /* Fix absolute symlinks: prepend MOUNTPOINT */ ++ if (buf[0] == '/') { ++ strcpy(initrd_arg, str_initrd_start); /* --initrd= */ ++ strcat(initrd_arg, mount_point); ++ strcat(initrd_arg, buf); ++ } ++ } + load_argv[idx] = initrd_arg; + ++idx; + } + } + + /* Append kernelpath as last arg of kexec */ +- load_argv[idx] = item->kernelpath; ++ /* allocate space */ ++ n = strlen(item->kernelpath) + 1 + sizeof(mount_point) + sizeof(buf); ++ ++ kernel_arg = (char *)malloc(n); ++ if (NULL == kernel_arg) { ++ perror("Can't allocate memory for kernel_arg"); ++ } else { ++ strcpy(kernel_arg, item->kernelpath); ++ ++ if ((len = readlink(item->kernelpath, buf, sizeof(buf)-1)) != -1) { ++ buf[len] = '\0'; ++ /* Fix absolute symlinks: prepend MOUNTPOINT */ ++ if (buf[0] == '/') { ++ strcpy(kernel_arg, mount_point); ++ strcat(kernel_arg, buf); ++ } ++ } ++ load_argv[idx] = kernel_arg; ++ } + + DPRINTF("load_argv: %s, %s, %s, %s, %s", load_argv[0], + load_argv[1], load_argv[2], + load_argv[3], load_argv[4]); + +- /* Mount boot device */ +- if ( -1 == mount(mount_dev, mount_point, mount_fstype, +- MS_RDONLY, NULL) ) { +- perror("Can't mount boot device"); +- exit(-1); +- } + + /* Load kernel */ + n = fexecw(kexec_path, (char *const *)load_argv, envp); +@@ -347,6 +381,7 @@ void start_kernel(struct params_t *params, int choice) + + dispose(cmdline_arg); + dispose(initrd_arg); ++ dispose(kernel_arg); + + /* Check /proc/sys/net presence */ + if ( -1 == stat("/proc/sys/net", &sinfo) ) { +-- +1.9.1 + |