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Enabled use of --interval:appended_partition_ with ISO growing.

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This commit is contained in:
Thomas Schmitt 2016-01-20 11:35:29 +01:00
parent 3d15642307
commit 7c05d2a865
5 changed files with 98 additions and 10 deletions
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17
libisofs/ecma119.c
View File

@ -106,6 +106,10 @@ void ecma119_image_free(Ecma119Image *t)
free(t->bootsrc);
if (t->boot_appended_idx != NULL)
free(t->boot_appended_idx);
if (t->boot_intvl_start != NULL)
free(t->boot_intvl_start);
if (t->boot_intvl_size != NULL)
free(t->boot_intvl_size);
if (t->system_area_data != NULL)
free(t->system_area_data);
if (t->checksum_ctx != NULL) { /* dispose checksum context */
@ -571,7 +575,8 @@ int ecma119_writer_write_vol_desc(IsoImageWriter *writer)
strncpy_pad((char*)vol.volume_id, vol_id, 32);
if (t->pvd_size_is_total_size) {
iso_bb(vol.vol_space_size,
t->total_size / 2048 - t->eff_partition_offset, 4);
t->total_size / 2048 + t->opts->ms_block - t->eff_partition_offset,
4);
} else {
iso_bb(vol.vol_space_size,
t->vol_space_size - t->eff_partition_offset, 4);
@ -2385,13 +2390,21 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *in_opts, Ecma119Image **img)
sizeof(IsoFileSrc *));
target->boot_appended_idx = calloc(target->num_bootsrc + 1,
sizeof(int));
if (target->bootsrc == NULL || target->boot_appended_idx == NULL) {
target->boot_intvl_start = calloc(target->num_bootsrc + 1,
sizeof(uint32_t));
target->boot_intvl_size = calloc(target->num_bootsrc + 1,
sizeof(uint32_t));
if (target->bootsrc == NULL || target->boot_appended_idx == NULL ||
target->boot_intvl_start == NULL ||
target->boot_intvl_size == NULL) {
ret = ISO_OUT_OF_MEM;
goto target_cleanup;
}
for (i= 0; i < target->num_bootsrc; i++) {
target->bootsrc[i] = NULL;
target->boot_appended_idx[i] = -1;
target->boot_intvl_start[i] = 0;
target->boot_intvl_size[i] = 0;
}
} else {
target->num_bootsrc = 0;

3
libisofs/ecma119.h
View File

@ -651,6 +651,9 @@ struct ecma119_image
int *boot_appended_idx; /* Appended partition which serve as boot images */
uint32_t *boot_intvl_start; /* In blocks of 2048 bytes */
uint32_t *boot_intvl_size; /* In blocks of 512 bytes */
/*
* System Area related information
*/

84
libisofs/eltorito.c
View File

@ -313,6 +313,35 @@ int iso_tree_add_boot_node(IsoDir *parent, const char *name, IsoBoot **boot)
return ++parent->nchildren;
}
/* Get start and size from "%d_start_%lus_size_%lud" */
static
void iso_parse_start_size(char *text, unsigned long *part_start,
unsigned long *part_size)
{
char *cpt;
unsigned long start, size;
cpt = strchr(text, '_');
if (cpt == NULL)
return;
if (strncmp(cpt, "_start_", 7) != 0)
return;
sscanf(cpt + 7, "%lu", &start);
cpt = strchr(cpt + 7, '_');
if (cpt == NULL)
return;
if (*(cpt - 1) != 's')
return;
if (strncmp(cpt, "_size_", 6) != 0)
return;
sscanf(cpt + 6, "%lu", &size);
for (cpt = cpt + 6; *cpt >= '0' && *cpt <= '9'; cpt++);
if (*cpt != 'd')
return;
*part_start = start;
*part_size = size;
}
static
int create_image(IsoImage *image, const char *image_path,
@ -325,6 +354,7 @@ int create_image(IsoImage *image, const char *image_path,
int boot_media_type = 0;
int load_sectors = 0; /* number of sector to load */
int part_idx = -1;
unsigned long part_start = 0, part_size = 0;
unsigned char partition_type = 0;
off_t size;
IsoNode *imgfile = NULL;
@ -351,6 +381,8 @@ int create_image(IsoImage *image, const char *image_path,
"Appended partition index for El Torito boot image is out of range");
return ISO_BOOT_IMAGE_NOT_VALID;
}
iso_parse_start_size((char *) (image_path + 30),
&part_start, &part_size);
part_idx--;
size = 1;
} else {
@ -468,6 +500,8 @@ int create_image(IsoImage *image, const char *image_path,
}
boot->image = (IsoFile*)imgfile;
boot->appended_idx = part_idx;
boot->appended_start = part_start;
boot->appended_size = part_size;
if (imgfile != NULL)
iso_node_ref(imgfile); /* get our ref */
boot->bootable = 1;
@ -864,7 +898,7 @@ int write_section_entry(uint8_t *buf, Ecma119Image *t, int idx)
struct el_torito_boot_image *img;
struct el_torito_section_entry *se =
(struct el_torito_section_entry*)buf;
int app_idx;
int app_idx, mode = 0;
img = t->catalog->bootimages[idx];
@ -873,7 +907,44 @@ int write_section_entry(uint8_t *buf, Ecma119Image *t, int idx)
iso_lsb(se->load_seg, img->load_seg, 2);
se->system_type[0] = img->partition_type;
if (t->boot_appended_idx[idx] >= 0) {
if (t->boot_appended_idx[idx] >= 0)
if (t->appended_part_size[t->boot_appended_idx[idx]] > 0)
mode = 2; /* appended partition */
if (mode == 0 && t->opts->appendable &&
(t->boot_intvl_start[idx] > 0 || t->boot_intvl_size[idx] > 0) &&
t->boot_intvl_start[idx] + (t->boot_intvl_size[idx] + 3) / 4 <=
t->opts->ms_block)
mode = 1; /* image interval */
if (mode == 0 && t->boot_appended_idx[idx] >= 0) {
iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
"Appended partition which shall serve as boot image does not exist");
return ISO_BOOT_IMAGE_NOT_VALID;
}
if (mode == 1) {
if (t->boot_intvl_start[idx] + (t->boot_intvl_size[idx] + 3) / 4 >
t->total_size / 2048 + t->opts->ms_block - t->eff_partition_offset
) {
iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
"Block interval which shall serve as boot image is outside result range");
return ISO_BOOT_IMAGE_NOT_VALID;
}
if (t->boot_intvl_size[idx] > 65535) {
if (img->platform_id == 0xef)
iso_lsb(se->sec_count, 0, 2);
else
iso_lsb(se->sec_count, 65535, 2);
} else {
if (t->boot_intvl_size[idx] == 0) {
iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
"Block interval which shall serve as boot image has zero size");
return ISO_BOOT_IMAGE_NOT_VALID;
}
iso_lsb(se->sec_count, t->boot_intvl_size[idx], 2);
}
iso_lsb(se->block, t->boot_intvl_start[idx], 4);
} else if (mode == 2) {
app_idx = t->boot_appended_idx[idx];
if (t->appended_part_size[app_idx] * 4 > 65535) {
if (img->platform_id == 0xef)
@ -881,11 +952,6 @@ int write_section_entry(uint8_t *buf, Ecma119Image *t, int idx)
else
iso_lsb(se->sec_count, 65535, 2);
} else {
if (t->appended_part_size[app_idx] == 0) {
iso_msg_submit(t->image->id, ISO_BOOT_IMAGE_NOT_VALID, 0,
"Appended partition which shall serve as boot image does not exist");
return ISO_BOOT_IMAGE_NOT_VALID;
}
iso_lsb(se->sec_count, t->appended_part_size[app_idx] * 4, 2);
}
iso_lsb(se->block, t->appended_part_start[app_idx], 4);
@ -1387,6 +1453,10 @@ int eltorito_writer_create(Ecma119Image *target)
/* Use an appended partition as boot image rather than IsoFile */
target->boot_appended_idx[idx] =
target->catalog->bootimages[idx]->appended_idx;
target->boot_intvl_start[idx] =
target->catalog->bootimages[idx]->appended_start;
target->boot_intvl_size[idx] =
target->catalog->bootimages[idx]->appended_size;
if (((target->system_area_options >> 2) & 0x3f) == 0 &&
(target->system_area_options & 3) == 1) {
/* ISO will not be a partition. It can span the whole image. */

2
libisofs/eltorito.h
View File

@ -55,6 +55,8 @@ struct el_torito_boot_image {
/* Overrides .image if >= 0 : array index of appended partition */
int appended_idx;
uint32_t appended_start; /* In blocks of 2048 bytes */
uint32_t appended_size; /* In blocks of 512 bytes */
unsigned int bootable:1; /**< If the entry is bootable. */
/**

2
libisofs/libisofs.h
View File

@ -3453,7 +3453,7 @@ int iso_image_set_boot_image(IsoImage *image, const char *image_path,
* @param image_path
* The absolute path of a IsoFile to be used as boot image.
>>> or --interval:appended_partition_$number...
>>> or --interval:appended_partition_${number}s_start_${start}d_size_$size:...
* @param type
* The boot media type. See iso_image_set_boot_image