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ntfs-3g
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move code to utils 

check that at least one cluster is in use, before starting

(Logical change 1.95)
edge.strict_endians
flatcap.org!flatcap 2003-01-14 20:48:15 +00:00
parent fa39b3f421
commit fe038bd2dc
1 changed files with 22 additions and 58 deletions
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80
ntfsprogs/ntfscluster.c
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@ -238,64 +238,13 @@ int parse_options (int argc, char **argv)
return (!err && !help && !ver);
}
/**
* mftrec_in_use - Determine if a MFT Record is in use
* @vol: An ntfs volume obtained from ntfs_mount
* @mref: MFT Reference (inode number)
*
* The metadata file $BITMAP has one binary bit representing each record in the
* MFT. The bit will be set for each record that is in use. The function
* reads the relevant part of $BITMAP into a buffer and tests the bit.
*
* This function has a static buffer in which it caches a section of $BITMAP.
* If the mref, being tested, lies outside the range, the buffer will be
* refreshed.
*
* Return: 1 MFT Record is in use
* 0 MFT Record is unused
* -1 Error occurred
*/
int mftrec_in_use (ntfs_volume *vol, MFT_REF mref)
{
static u8 buffer[512];
static s64 bmpmref = -sizeof (buffer) - 1; /* Which bit of $BITMAP is in the buffer */
int byte, bit;
if (!vol)
return -1;
/* Does mref lie in the section of $Bitmap we already have cached? */
if ((mref < bmpmref) || (mref >= (bmpmref + (sizeof (buffer) << 3)))) {
Dprintf ("Bit lies outside cache.\n");
/* Mark the buffer as not in use, in case the read is shorter. */
memset (buffer, 0, sizeof (buffer));
bmpmref = mref & (~((sizeof (buffer) << 3) - 1));
if (ntfs_attr_pread (vol->mftbmp_na, (bmpmref>>3), sizeof (buffer), buffer) < 0) {
Eprintf ("Couldn't read $MFT/$BITMAP: %s\n", strerror (errno));
return -1;
}
Dprintf ("Reloaded bitmap buffer.\n");
}
bit = 1 << (mref & 7);
byte = (mref >> 3) & (sizeof (buffer) - 1);
Dprintf ("cluster = %lld, bmpmref = %lld, byte = %d, bit = %d, in use %d\n",
mref, bmpmref, byte, bit, buffer[byte] & bit);
return (buffer[byte] & bit);
}
/**
* cluster_find
*/
int cluster_find (ntfs_volume *vol, LCN s_begin, LCN s_end)
{
int i;
int result = 1;
u64 i;
int in_use = 0, result = 1;
u8 *buffer;
if (!vol)
@ -307,29 +256,44 @@ int cluster_find (ntfs_volume *vol, LCN s_begin, LCN s_end)
return 1;
}
for (i = s_begin; i < s_end; i++) {
if (utils_cluster_in_use (vol, i) == 1) {
in_use = 1;
break;
}
}
if (!in_use) {
if (s_begin == s_end)
printf ("clusters isn't in use\n");
else
printf ("clusters aren't in use\n");
return 0;
}
// first, is the cluster in use in $Bitmap?
for (i = 0; i < vol->nr_mft_records; i++) {
ntfs_inode *inode;
ntfs_attr_search_ctx *ctx;
if (!mftrec_in_use (vol, i)) {
if (!utils_mftrec_in_use (vol, i)) {
//printf ("%d skipped\n", i);
continue;
}
inode = ntfs_inode_open (vol, i);
if (!inode) {
Eprintf ("Can't read inode %d\n", i);
Eprintf ("Can't read inode %lld\n", i);
goto free;
}
if (inode->nr_extents == -1) {
printf ("inode %d is an extent record\n", i);
printf ("inode %lld is an extent record\n", i);
goto close;
}
Vprintf ("Inode: %d\n", i);
Vprintf ("Inode: %lld\n", i);
ctx = ntfs_attr_get_search_ctx (inode, NULL);
if (ntfs_attr_lookup (AT_STANDARD_INFORMATION, NULL, 0, IGNORE_CASE, 0, NULL, 0, ctx) < 0) {
@ -376,7 +340,7 @@ int cluster_find (ntfs_volume *vol, LCN s_begin, LCN s_end)
char buffer[256];
utils_inode_get_name (inode, buffer, sizeof (buffer));
//XXX distinguish between file/dir
printf ("inode %d %s", i, buffer);
printf ("inode %lld %s", i, buffer);
utils_attr_get_name (vol, ctx->attr, buffer, sizeof (buffer));
printf ("%c%s\n", PATH_SEP, buffer);
//printf ("\n");