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Second stage of implementation of GPT production.

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It implements the writer class for the backup GPT.
This commit is contained in:
Thomas Schmitt
2012-06-04 20:39:34 +02:00
parent 21109ffcf1
commit 36502f8ae3
4 changed files with 363 additions and 145 deletions
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21
libisofs/ecma119.c
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@@ -1251,10 +1251,11 @@ static
int write_head_part1(Ecma119Image *target, int *write_count, int flag)
{
int res, i;
uint8_t sa[16 * BLOCK_SIZE];
uint8_t *sa;
IsoImageWriter *writer;
size_t buffer_size = 0, buffer_free = 0, buffer_start_free = 0;
sa = target->sys_area_as_written;
iso_ring_buffer_get_buf_status(target->buffer, &buffer_size,
&buffer_start_free);
*write_count = 0;
@@ -1884,15 +1885,14 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
if (target->hfsplus_blessed[i] != NULL)
iso_node_ref(target->hfsplus_blessed[i]);
}
/* Note: Set apm_block_size to 2048, if desired, before pthread_create()
at the end of this function.
Register any Apple Partition Map entries before pthread_create().
*/
target->apm_block_size = 512;
for (i = 0; i < ISO_APM_ENTRIES_MAX; i++)
target->apm_req[i] = NULL;
for (i = 0; i < ISO_GPT_ENTRIES_MAX; i++)
target->gpt_req[i] = NULL;
target->gpt_part_start = 0;
target->gpt_backup_end = 0;
target->gpt_max_entries = 0;
/*
* 2. Based on those options, create needed writers: iso, joliet...
@@ -1926,6 +1926,7 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
if (target->iso1999) {
nwriters++;
}
nwriters++; /* GPT backup tail writer */
nwriters++; /* Tail padding writer */
if ((target->md5_file_checksums & 1) || target->md5_session_checksum) {
nwriters++;
@@ -2022,6 +2023,16 @@ int ecma119_image_new(IsoImage *src, IsoWriteOpts *opts, Ecma119Image **img)
}
}
/* This writer has to be added to the list after any writer which might
request production of APM or GPT partition entries by its
compute_data_blocks() method. Its compute_data_blocks() fills the gaps
in APM requests. It determines the position of primary GPT and
backup GPT. Further it reserves blocks for the backup GPT.
*/
ret = gpt_tail_writer_ecma119_writer_create(target);
if (ret < 0)
goto target_cleanup;
/* IMPORTANT: This must be the last writer before the checksum writer */
ret = zero_writer_create(target, target->tail_blocks, 1);
if (ret < 0)