d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Attempt to improve the logic for automatically sizing partitions

Browse Source 
to take into account the new default of starting the first partition
after the boot blocks instead of at sector 0. If you used automatic
sizing when the first partition did not start at 0, you would get
an error that the automatically sized partition extended beyond the
end of the disk.

Note that there are probably still many more complex cases where
automatic sizing and placement will not work (e.g. non-contiguous
or out of order partitions).
This commit is contained in:
Ian Dowse 2005-08-14 22:46:50 +00:00
parent adf98e7afa
commit 3b89beb171
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149061
1 changed files with 62 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
sbin/bsdlabel/bsdlabel.c
View File

@ -1074,7 +1074,8 @@ checklabel(struct disklabel *lp)
struct partition *pp;
int i, errors = 0;
char part;
u_long total_size, total_percent, current_offset;
u_long base_offset, needed, total_size, total_percent, current_offset;
long free_space;
int seen_default_offset;
int hog_part;
int j;
@ -1201,9 +1202,25 @@ checklabel(struct disklabel *lp)
}
}
}
/* Find out the total free space, excluding the boot block area. */
base_offset = BBSIZE / secsize;
free_space = 0;
for (i = 0; i < lp->d_npartitions; i++) {
pp = &lp->d_partitions[i];
if (!part_set[i] || i == RAW_PART ||
part_size_type[i] == '%' || part_size_type[i] == '*')
continue;
if (pp->p_offset > base_offset)
free_space += pp->p_offset - base_offset;
if (pp->p_offset + pp->p_size > base_offset)
base_offset = pp->p_offset + pp->p_size;
}
if (base_offset < lp->d_secperunit)
free_space += lp->d_secperunit - base_offset;
/* handle % partitions - note %'s don't need to add up to 100! */
if (total_percent != 0) {
long free_space = lp->d_secperunit - total_size;
if (total_percent > 100) {
fprintf(stderr,"total percentage %lu is greater than 100\n",
total_percent);
@ -1232,12 +1249,52 @@ checklabel(struct disklabel *lp)
}
/* give anything remaining to the hog partition */
if (hog_part != -1) {
lp->d_partitions[hog_part].p_size = lp->d_secperunit - total_size;
total_size = lp->d_secperunit;
/*
* Find the range of offsets usable by '*' partitions around
* the hog partition and how much space they need.
*/
needed = 0;
base_offset = BBSIZE / secsize;
for (i = hog_part - 1; i >= 0; i--) {
pp = &lp->d_partitions[i];
if (!part_set[i] || i == RAW_PART)
continue;
if (part_offset_type[i] == '*') {
needed += pp->p_size;
continue;
}
base_offset = pp->p_offset + pp->p_size;
break;
}
current_offset = lp->d_secperunit;
for (i = lp->d_npartitions - 1; i > hog_part; i--) {
pp = &lp->d_partitions[i];
if (!part_set[i] || i == RAW_PART)
continue;
if (part_offset_type[i] == '*') {
needed += pp->p_size;
continue;
}
current_offset = pp->p_offset;
}
if (current_offset - base_offset <= needed) {
fprintf(stderr, "Cannot find space for partition %c\n",
hog_part + 'a');
fprintf(stderr,
"Need more than %lu sectors between %lu and %lu\n",
needed, base_offset, current_offset);
errors++;
lp->d_partitions[hog_part].p_size = 0;
} else {
lp->d_partitions[hog_part].p_size = current_offset -
base_offset - needed;
total_size += lp->d_partitions[hog_part].p_size;
}
}
/* Now set the offsets for each partition */
current_offset = 0; /* in sectors */
current_offset = BBSIZE / secsize; /* in sectors */
seen_default_offset = 0;
for (i = 0; i < lp->d_npartitions; i++) {
part = 'a' + i;