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Add a @start_vcn parameter to lcnalloc.[ch]::ntfs_cluster_alloc 

(Logical change 1.466)
edge.strict_endians
(none)!yura 2004-08-01 11:05:46 +00:00
parent ebeac904ba
commit 50b9026628
2 changed files with 8 additions and 6 deletions
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2
include/ntfs/lcnalloc.h
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@ -35,7 +35,7 @@ typedef enum {
} NTFS_CLUSTER_ALLOCATION_ZONES;
extern runlist *ntfs_cluster_alloc(ntfs_volume *vol, s64 count, LCN start_lcn,
const NTFS_CLUSTER_ALLOCATION_ZONES zone);
const NTFS_CLUSTER_ALLOCATION_ZONES zone, VCN start_vcn);
extern int ntfs_cluster_free(ntfs_volume *vol, ntfs_attr *na, VCN start_vcn,
s64 count);

12
libntfs/lcnalloc.c
View File

@ -87,13 +87,9 @@
* removing the duplicate logic requires _very_ careful consideration of _all_
* possible code paths. So at least for now, I am leaving the double logic -
* better safe than sorry... (AIA)
*
* FIXME: Add a start_vcn parameter if we need it and then instead of setting
* rl[rlpos].vcn = 0; for the first run, add a sparse start element (LCN_HOLE),
* and make rl[rlpos].vcn = start_vcn; for the first non-sparse run. (AIA)
*/
runlist *ntfs_cluster_alloc(ntfs_volume *vol, s64 count, LCN start_lcn,
const NTFS_CLUSTER_ALLOCATION_ZONES zone)
const NTFS_CLUSTER_ALLOCATION_ZONES zone, VCN start_vcn)
{
LCN zone_start, zone_end, bmp_pos, bmp_initial_pos, last_read_pos, lcn;
LCN prev_lcn = 0, prev_run_len = 0, mft_zone_size;
@ -330,6 +326,12 @@ runlist *ntfs_cluster_alloc(ntfs_volume *vol, s64 count, LCN start_lcn,
"first run.\n",
__FUNCTION__);
rl[rlpos].vcn = 0;
if (start_vcn) {
rl[0].lcn = LCN_RL_NOT_MAPPED;
rl[0].length = start_vcn;
rl[1].vcn = start_vcn;
rlpos = 1;
}
}
rl[rlpos].lcn = prev_lcn = lcn + bmp_pos;
rl[rlpos].length = prev_run_len = 1;