ntfs_cluster_alloc(): use 512 bytes NTFS_LCNALLOC_BSIZE instead of 8kB

master
szaka 2007-01-01 17:12:04 +00:00
parent 0a918f567f
commit 31d7b6875f
1 changed files with 6 additions and 4 deletions

View File

@ -45,6 +45,8 @@
#include "logging.h"
#include "misc.h"
#define NTFS_LCNALLOC_BSIZE 512
/**
* ntfs_cluster_alloc - allocate clusters on an ntfs volume
* @vol: mounted ntfs volume on which to allocate the clusters
@ -75,7 +77,7 @@
*
* This is not the prettiest function but the complexity stems from the need of
* implementing the mft vs data zoned approach and from the fact that we have
* access to the lcn bitmap in portions of up to 8192 bytes at a time, so we
* access to the lcn bitmap via up to NTFS_LCNALLOC_BSIZE bytes at a time, so we
* need to cope with crossing over boundaries of two buffers. Further, the fact
* that the allocator allows for caller supplied hints as to the location of
* where allocation should begin and the fact that the allocator keeps track of
@ -134,7 +136,7 @@ runlist *ntfs_cluster_alloc(ntfs_volume *vol, VCN start_vcn, s64 count,
}
/* Allocate memory. */
buf = ntfs_malloc(8192);
buf = ntfs_malloc(NTFS_LCNALLOC_BSIZE);
if (!buf)
return NULL;
/*
@ -222,7 +224,7 @@ runlist *ntfs_cluster_alloc(ntfs_volume *vol, VCN start_vcn, s64 count,
/* Loop until we run out of free clusters. */
last_read_pos = bmp_pos >> 3;
ntfs_log_trace("last_read_pos = 0x%llx.\n", (long long)last_read_pos);
br = ntfs_attr_pread(vol->lcnbmp_na, last_read_pos, 8192, buf);
br = ntfs_attr_pread(vol->lcnbmp_na, last_read_pos, NTFS_LCNALLOC_BSIZE, buf);
if (br <= 0) {
if (!br) {
/* Reached end of attribute. */
@ -235,7 +237,7 @@ runlist *ntfs_cluster_alloc(ntfs_volume *vol, VCN start_vcn, s64 count,
goto err_ret;
}
/*
* We might have read less than 8192 bytes if we are close to
* We might have read less than NTFS_LCNALLOC_BSIZE bytes if we are close to
* the end of the attribute.
*/
buf_size = (int)br << 3;