int ret = 0;
ntfs_debug("Entering.");
+ if (!rl)
+ return 0;
for (; rl->length; rl++) {
int err;
BUG_ON(zone < FIRST_ZONE);
BUG_ON(zone > LAST_ZONE);
- /* Return empty runlist if @count == 0 */
- // FIXME: Do we want to just return NULL instead? (AIA)
- if (!count) {
- rl = ntfs_malloc_nofs(PAGE_SIZE);
- if (!rl)
- return ERR_PTR(-ENOMEM);
- rl[0].vcn = start_vcn;
- rl[0].lcn = LCN_RL_NOT_MAPPED;
- rl[0].length = 0;
- return rl;
- }
+ /* Return NULL if @count is zero. */
+ if (!count)
+ return NULL;
/* Take the lcnbmp lock for writing. */
down_write(&vol->lcnbmp_lock);
/*
buf_size = i_size - last_read_pos;
buf_size <<= 3;
lcn = bmp_pos & 7;
- bmp_pos &= ~7;
+ bmp_pos &= ~(LCN)7;
ntfs_debug("Before inner while loop: buf_size %i, lcn 0x%llx, "
"bmp_pos 0x%llx, need_writeback %i.", buf_size,
(unsigned long long)lcn,
(unsigned int)*byte);
/* Skip full bytes. */
if (*byte == 0xff) {
- lcn = (lcn + 8) & ~7;
+ lcn = (lcn + 8) & ~(LCN)7;
ntfs_debug("Continuing while loop 1.");
continue;
}
/**
* __ntfs_cluster_free - free clusters on an ntfs volume
- * @vi: vfs inode whose runlist describes the clusters to free
- * @start_vcn: vcn in the runlist of @vi at which to start freeing clusters
+ * @ni: ntfs inode whose runlist describes the clusters to free
+ * @start_vcn: vcn in the runlist of @ni at which to start freeing clusters
* @count: number of clusters to free or -1 for all clusters
- * @is_rollback: if TRUE this is a rollback operation
+ * @is_rollback: true if this is a rollback operation
*
* Free @count clusters starting at the cluster @start_vcn in the runlist
- * described by the vfs inode @vi.
+ * described by the vfs inode @ni.
*
* If @count is -1, all clusters from @start_vcn to the end of the runlist are
* deallocated. Thus, to completely free all clusters in a runlist, use
* Return the number of deallocated clusters (not counting sparse ones) on
* success and -errno on error.
*
- * Locking: - The runlist described by @vi must be unlocked on entry and is
- * unlocked on return.
- * - This function takes the runlist lock of @vi for reading and
- * sometimes for writing and sometimes modifies the runlist.
+ * Locking: - The runlist described by @ni must be locked for writing on entry
+ * and is locked on return. Note the runlist may be modified when
+ * needed runlist fragments need to be mapped.
* - The volume lcn bitmap must be unlocked on entry and is unlocked
* on return.
* - This function takes the volume lcn bitmap lock for writing and
* modifies the bitmap contents.
*/
-s64 __ntfs_cluster_free(struct inode *vi, const VCN start_vcn, s64 count,
+s64 __ntfs_cluster_free(ntfs_inode *ni, const VCN start_vcn, s64 count,
const BOOL is_rollback)
{
s64 delta, to_free, total_freed, real_freed;
- ntfs_inode *ni;
ntfs_volume *vol;
struct inode *lcnbmp_vi;
runlist_element *rl;
int err;
- BUG_ON(!vi);
+ BUG_ON(!ni);
ntfs_debug("Entering for i_ino 0x%lx, start_vcn 0x%llx, count "
- "0x%llx.%s", vi->i_ino, (unsigned long long)start_vcn,
+ "0x%llx.%s", ni->mft_no, (unsigned long long)start_vcn,
(unsigned long long)count,
is_rollback ? " (rollback)" : "");
- ni = NTFS_I(vi);
vol = ni->vol;
lcnbmp_vi = vol->lcnbmp_ino;
BUG_ON(!lcnbmp_vi);
total_freed = real_freed = 0;
- down_read(&ni->runlist.lock);
- rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, FALSE);
+ rl = ntfs_attr_find_vcn_nolock(ni, start_vcn, TRUE);
if (IS_ERR(rl)) {
if (!is_rollback)
ntfs_error(vol->sb, "Failed to find first runlist "
/* Attempt to map runlist. */
vcn = rl->vcn;
- rl = ntfs_attr_find_vcn_nolock(ni, vcn, FALSE);
+ rl = ntfs_attr_find_vcn_nolock(ni, vcn, TRUE);
if (IS_ERR(rl)) {
err = PTR_ERR(rl);
if (!is_rollback)
/* Update the total done clusters. */
total_freed += to_free;
}
- up_read(&ni->runlist.lock);
if (likely(!is_rollback))
up_write(&vol->lcnbmp_lock);
ntfs_debug("Done.");
return real_freed;
err_out:
- up_read(&ni->runlist.lock);
if (is_rollback)
return err;
/* If no real clusters were freed, no need to rollback. */
* If rollback fails, set the volume errors flag, emit an error
* message, and return the error code.
*/
- delta = __ntfs_cluster_free(vi, start_vcn, total_freed, TRUE);
+ delta = __ntfs_cluster_free(ni, start_vcn, total_freed, TRUE);
if (delta < 0) {
ntfs_error(vol->sb, "Failed to rollback (error %i). Leaving "
"inconsistent metadata! Unmount and run "