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1307 lines
35 KiB
1307 lines
35 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* This file is part of UBIFS. |
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* |
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* Copyright (C) 2006-2008 Nokia Corporation. |
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* |
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* Authors: Adrian Hunter |
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* Artem Bityutskiy (Битюцкий Артём) |
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*/ |
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|
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/* |
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* This file implements the functions that access LEB properties and their |
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* categories. LEBs are categorized based on the needs of UBIFS, and the |
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* categories are stored as either heaps or lists to provide a fast way of |
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* finding a LEB in a particular category. For example, UBIFS may need to find |
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* an empty LEB for the journal, or a very dirty LEB for garbage collection. |
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*/ |
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|
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#include "ubifs.h" |
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|
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/** |
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* get_heap_comp_val - get the LEB properties value for heap comparisons. |
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* @lprops: LEB properties |
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* @cat: LEB category |
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*/ |
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static int get_heap_comp_val(struct ubifs_lprops *lprops, int cat) |
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{ |
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switch (cat) { |
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case LPROPS_FREE: |
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return lprops->free; |
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case LPROPS_DIRTY_IDX: |
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return lprops->free + lprops->dirty; |
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default: |
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return lprops->dirty; |
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} |
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} |
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/** |
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* move_up_lpt_heap - move a new heap entry up as far as possible. |
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* @c: UBIFS file-system description object |
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* @heap: LEB category heap |
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* @lprops: LEB properties to move |
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* @cat: LEB category |
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* |
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* New entries to a heap are added at the bottom and then moved up until the |
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* parent's value is greater. In the case of LPT's category heaps, the value |
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* is either the amount of free space or the amount of dirty space, depending |
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* on the category. |
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*/ |
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static void move_up_lpt_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, |
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struct ubifs_lprops *lprops, int cat) |
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{ |
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int val1, val2, hpos; |
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|
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hpos = lprops->hpos; |
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if (!hpos) |
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return; /* Already top of the heap */ |
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val1 = get_heap_comp_val(lprops, cat); |
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/* Compare to parent and, if greater, move up the heap */ |
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do { |
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int ppos = (hpos - 1) / 2; |
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|
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val2 = get_heap_comp_val(heap->arr[ppos], cat); |
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if (val2 >= val1) |
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return; |
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/* Greater than parent so move up */ |
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heap->arr[ppos]->hpos = hpos; |
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heap->arr[hpos] = heap->arr[ppos]; |
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heap->arr[ppos] = lprops; |
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lprops->hpos = ppos; |
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hpos = ppos; |
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} while (hpos); |
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} |
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/** |
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* adjust_lpt_heap - move a changed heap entry up or down the heap. |
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* @c: UBIFS file-system description object |
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* @heap: LEB category heap |
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* @lprops: LEB properties to move |
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* @hpos: heap position of @lprops |
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* @cat: LEB category |
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* |
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* Changed entries in a heap are moved up or down until the parent's value is |
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* greater. In the case of LPT's category heaps, the value is either the amount |
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* of free space or the amount of dirty space, depending on the category. |
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*/ |
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static void adjust_lpt_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, |
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struct ubifs_lprops *lprops, int hpos, int cat) |
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{ |
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int val1, val2, val3, cpos; |
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val1 = get_heap_comp_val(lprops, cat); |
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/* Compare to parent and, if greater than parent, move up the heap */ |
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if (hpos) { |
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int ppos = (hpos - 1) / 2; |
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val2 = get_heap_comp_val(heap->arr[ppos], cat); |
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if (val1 > val2) { |
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/* Greater than parent so move up */ |
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while (1) { |
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heap->arr[ppos]->hpos = hpos; |
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heap->arr[hpos] = heap->arr[ppos]; |
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heap->arr[ppos] = lprops; |
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lprops->hpos = ppos; |
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hpos = ppos; |
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if (!hpos) |
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return; |
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ppos = (hpos - 1) / 2; |
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val2 = get_heap_comp_val(heap->arr[ppos], cat); |
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if (val1 <= val2) |
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return; |
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/* Still greater than parent so keep going */ |
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} |
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} |
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} |
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|
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/* Not greater than parent, so compare to children */ |
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while (1) { |
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/* Compare to left child */ |
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cpos = hpos * 2 + 1; |
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if (cpos >= heap->cnt) |
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return; |
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val2 = get_heap_comp_val(heap->arr[cpos], cat); |
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if (val1 < val2) { |
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/* Less than left child, so promote biggest child */ |
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if (cpos + 1 < heap->cnt) { |
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val3 = get_heap_comp_val(heap->arr[cpos + 1], |
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cat); |
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if (val3 > val2) |
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cpos += 1; /* Right child is bigger */ |
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} |
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heap->arr[cpos]->hpos = hpos; |
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heap->arr[hpos] = heap->arr[cpos]; |
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heap->arr[cpos] = lprops; |
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lprops->hpos = cpos; |
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hpos = cpos; |
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continue; |
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} |
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/* Compare to right child */ |
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cpos += 1; |
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if (cpos >= heap->cnt) |
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return; |
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val3 = get_heap_comp_val(heap->arr[cpos], cat); |
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if (val1 < val3) { |
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/* Less than right child, so promote right child */ |
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heap->arr[cpos]->hpos = hpos; |
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heap->arr[hpos] = heap->arr[cpos]; |
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heap->arr[cpos] = lprops; |
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lprops->hpos = cpos; |
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hpos = cpos; |
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continue; |
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} |
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return; |
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} |
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} |
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/** |
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* add_to_lpt_heap - add LEB properties to a LEB category heap. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to add |
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* @cat: LEB category |
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* |
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* This function returns %1 if @lprops is added to the heap for LEB category |
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* @cat, otherwise %0 is returned because the heap is full. |
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*/ |
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static int add_to_lpt_heap(struct ubifs_info *c, struct ubifs_lprops *lprops, |
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int cat) |
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{ |
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struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1]; |
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|
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if (heap->cnt >= heap->max_cnt) { |
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const int b = LPT_HEAP_SZ / 2 - 1; |
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int cpos, val1, val2; |
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/* Compare to some other LEB on the bottom of heap */ |
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/* Pick a position kind of randomly */ |
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cpos = (((size_t)lprops >> 4) & b) + b; |
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ubifs_assert(c, cpos >= b); |
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ubifs_assert(c, cpos < LPT_HEAP_SZ); |
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ubifs_assert(c, cpos < heap->cnt); |
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val1 = get_heap_comp_val(lprops, cat); |
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val2 = get_heap_comp_val(heap->arr[cpos], cat); |
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if (val1 > val2) { |
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struct ubifs_lprops *lp; |
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lp = heap->arr[cpos]; |
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lp->flags &= ~LPROPS_CAT_MASK; |
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lp->flags |= LPROPS_UNCAT; |
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list_add(&lp->list, &c->uncat_list); |
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lprops->hpos = cpos; |
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heap->arr[cpos] = lprops; |
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move_up_lpt_heap(c, heap, lprops, cat); |
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dbg_check_heap(c, heap, cat, lprops->hpos); |
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return 1; /* Added to heap */ |
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} |
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dbg_check_heap(c, heap, cat, -1); |
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return 0; /* Not added to heap */ |
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} else { |
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lprops->hpos = heap->cnt++; |
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heap->arr[lprops->hpos] = lprops; |
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move_up_lpt_heap(c, heap, lprops, cat); |
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dbg_check_heap(c, heap, cat, lprops->hpos); |
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return 1; /* Added to heap */ |
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} |
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} |
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/** |
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* remove_from_lpt_heap - remove LEB properties from a LEB category heap. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to remove |
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* @cat: LEB category |
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*/ |
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static void remove_from_lpt_heap(struct ubifs_info *c, |
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struct ubifs_lprops *lprops, int cat) |
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{ |
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struct ubifs_lpt_heap *heap; |
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int hpos = lprops->hpos; |
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heap = &c->lpt_heap[cat - 1]; |
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ubifs_assert(c, hpos >= 0 && hpos < heap->cnt); |
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ubifs_assert(c, heap->arr[hpos] == lprops); |
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heap->cnt -= 1; |
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if (hpos < heap->cnt) { |
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heap->arr[hpos] = heap->arr[heap->cnt]; |
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heap->arr[hpos]->hpos = hpos; |
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adjust_lpt_heap(c, heap, heap->arr[hpos], hpos, cat); |
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} |
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dbg_check_heap(c, heap, cat, -1); |
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} |
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/** |
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* lpt_heap_replace - replace lprops in a category heap. |
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* @c: UBIFS file-system description object |
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* @new_lprops: LEB properties with which to replace |
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* @cat: LEB category |
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* |
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* During commit it is sometimes necessary to copy a pnode (see dirty_cow_pnode) |
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* and the lprops that the pnode contains. When that happens, references in |
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* the category heaps to those lprops must be updated to point to the new |
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* lprops. This function does that. |
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*/ |
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static void lpt_heap_replace(struct ubifs_info *c, |
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struct ubifs_lprops *new_lprops, int cat) |
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{ |
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struct ubifs_lpt_heap *heap; |
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int hpos = new_lprops->hpos; |
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heap = &c->lpt_heap[cat - 1]; |
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heap->arr[hpos] = new_lprops; |
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} |
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/** |
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* ubifs_add_to_cat - add LEB properties to a category list or heap. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to add |
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* @cat: LEB category to which to add |
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* |
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* LEB properties are categorized to enable fast find operations. |
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*/ |
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void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops, |
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int cat) |
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{ |
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switch (cat) { |
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case LPROPS_DIRTY: |
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case LPROPS_DIRTY_IDX: |
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case LPROPS_FREE: |
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if (add_to_lpt_heap(c, lprops, cat)) |
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break; |
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/* No more room on heap so make it un-categorized */ |
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cat = LPROPS_UNCAT; |
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fallthrough; |
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case LPROPS_UNCAT: |
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list_add(&lprops->list, &c->uncat_list); |
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break; |
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case LPROPS_EMPTY: |
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list_add(&lprops->list, &c->empty_list); |
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break; |
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case LPROPS_FREEABLE: |
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list_add(&lprops->list, &c->freeable_list); |
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c->freeable_cnt += 1; |
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break; |
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case LPROPS_FRDI_IDX: |
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list_add(&lprops->list, &c->frdi_idx_list); |
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break; |
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default: |
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ubifs_assert(c, 0); |
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} |
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lprops->flags &= ~LPROPS_CAT_MASK; |
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lprops->flags |= cat; |
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c->in_a_category_cnt += 1; |
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ubifs_assert(c, c->in_a_category_cnt <= c->main_lebs); |
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} |
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/** |
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* ubifs_remove_from_cat - remove LEB properties from a category list or heap. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to remove |
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* @cat: LEB category from which to remove |
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* |
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* LEB properties are categorized to enable fast find operations. |
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*/ |
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static void ubifs_remove_from_cat(struct ubifs_info *c, |
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struct ubifs_lprops *lprops, int cat) |
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{ |
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switch (cat) { |
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case LPROPS_DIRTY: |
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case LPROPS_DIRTY_IDX: |
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case LPROPS_FREE: |
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remove_from_lpt_heap(c, lprops, cat); |
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break; |
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case LPROPS_FREEABLE: |
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c->freeable_cnt -= 1; |
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ubifs_assert(c, c->freeable_cnt >= 0); |
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fallthrough; |
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case LPROPS_UNCAT: |
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case LPROPS_EMPTY: |
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case LPROPS_FRDI_IDX: |
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ubifs_assert(c, !list_empty(&lprops->list)); |
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list_del(&lprops->list); |
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break; |
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default: |
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ubifs_assert(c, 0); |
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} |
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c->in_a_category_cnt -= 1; |
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ubifs_assert(c, c->in_a_category_cnt >= 0); |
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} |
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/** |
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* ubifs_replace_cat - replace lprops in a category list or heap. |
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* @c: UBIFS file-system description object |
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* @old_lprops: LEB properties to replace |
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* @new_lprops: LEB properties with which to replace |
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* |
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* During commit it is sometimes necessary to copy a pnode (see dirty_cow_pnode) |
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* and the lprops that the pnode contains. When that happens, references in |
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* category lists and heaps must be replaced. This function does that. |
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*/ |
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void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops, |
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struct ubifs_lprops *new_lprops) |
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{ |
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int cat; |
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cat = new_lprops->flags & LPROPS_CAT_MASK; |
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switch (cat) { |
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case LPROPS_DIRTY: |
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case LPROPS_DIRTY_IDX: |
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case LPROPS_FREE: |
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lpt_heap_replace(c, new_lprops, cat); |
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break; |
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case LPROPS_UNCAT: |
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case LPROPS_EMPTY: |
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case LPROPS_FREEABLE: |
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case LPROPS_FRDI_IDX: |
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list_replace(&old_lprops->list, &new_lprops->list); |
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break; |
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default: |
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ubifs_assert(c, 0); |
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} |
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} |
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|
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/** |
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* ubifs_ensure_cat - ensure LEB properties are categorized. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties |
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* |
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* A LEB may have fallen off of the bottom of a heap, and ended up as |
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* un-categorized even though it has enough space for us now. If that is the |
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* case this function will put the LEB back onto a heap. |
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*/ |
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void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops) |
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{ |
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int cat = lprops->flags & LPROPS_CAT_MASK; |
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if (cat != LPROPS_UNCAT) |
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return; |
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cat = ubifs_categorize_lprops(c, lprops); |
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if (cat == LPROPS_UNCAT) |
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return; |
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ubifs_remove_from_cat(c, lprops, LPROPS_UNCAT); |
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ubifs_add_to_cat(c, lprops, cat); |
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} |
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|
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/** |
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* ubifs_categorize_lprops - categorize LEB properties. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to categorize |
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* |
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* LEB properties are categorized to enable fast find operations. This function |
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* returns the LEB category to which the LEB properties belong. Note however |
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* that if the LEB category is stored as a heap and the heap is full, the |
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* LEB properties may have their category changed to %LPROPS_UNCAT. |
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*/ |
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int ubifs_categorize_lprops(const struct ubifs_info *c, |
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const struct ubifs_lprops *lprops) |
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{ |
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if (lprops->flags & LPROPS_TAKEN) |
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return LPROPS_UNCAT; |
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|
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if (lprops->free == c->leb_size) { |
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ubifs_assert(c, !(lprops->flags & LPROPS_INDEX)); |
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return LPROPS_EMPTY; |
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} |
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|
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if (lprops->free + lprops->dirty == c->leb_size) { |
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if (lprops->flags & LPROPS_INDEX) |
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return LPROPS_FRDI_IDX; |
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else |
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return LPROPS_FREEABLE; |
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} |
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|
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if (lprops->flags & LPROPS_INDEX) { |
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if (lprops->dirty + lprops->free >= c->min_idx_node_sz) |
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return LPROPS_DIRTY_IDX; |
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} else { |
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if (lprops->dirty >= c->dead_wm && |
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lprops->dirty > lprops->free) |
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return LPROPS_DIRTY; |
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if (lprops->free > 0) |
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return LPROPS_FREE; |
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} |
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|
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return LPROPS_UNCAT; |
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} |
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|
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/** |
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* change_category - change LEB properties category. |
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* @c: UBIFS file-system description object |
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* @lprops: LEB properties to re-categorize |
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* |
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* LEB properties are categorized to enable fast find operations. When the LEB |
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* properties change they must be re-categorized. |
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*/ |
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static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops) |
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{ |
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int old_cat = lprops->flags & LPROPS_CAT_MASK; |
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int new_cat = ubifs_categorize_lprops(c, lprops); |
|
|
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if (old_cat == new_cat) { |
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struct ubifs_lpt_heap *heap; |
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|
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/* lprops on a heap now must be moved up or down */ |
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if (new_cat < 1 || new_cat > LPROPS_HEAP_CNT) |
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return; /* Not on a heap */ |
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heap = &c->lpt_heap[new_cat - 1]; |
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adjust_lpt_heap(c, heap, lprops, lprops->hpos, new_cat); |
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} else { |
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ubifs_remove_from_cat(c, lprops, old_cat); |
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ubifs_add_to_cat(c, lprops, new_cat); |
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} |
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} |
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|
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/** |
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* ubifs_calc_dark - calculate LEB dark space size. |
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* @c: the UBIFS file-system description object |
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* @spc: amount of free and dirty space in the LEB |
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* |
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* This function calculates and returns amount of dark space in an LEB which |
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* has @spc bytes of free and dirty space. |
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* |
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* UBIFS is trying to account the space which might not be usable, and this |
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* space is called "dark space". For example, if an LEB has only %512 free |
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* bytes, it is dark space, because it cannot fit a large data node. |
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*/ |
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int ubifs_calc_dark(const struct ubifs_info *c, int spc) |
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{ |
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ubifs_assert(c, !(spc & 7)); |
|
|
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if (spc < c->dark_wm) |
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return spc; |
|
|
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/* |
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* If we have slightly more space then the dark space watermark, we can |
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* anyway safely assume it we'll be able to write a node of the |
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* smallest size there. |
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*/ |
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if (spc - c->dark_wm < MIN_WRITE_SZ) |
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return spc - MIN_WRITE_SZ; |
|
|
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return c->dark_wm; |
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} |
|
|
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/** |
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* is_lprops_dirty - determine if LEB properties are dirty. |
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* @c: the UBIFS file-system description object |
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* @lprops: LEB properties to test |
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*/ |
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static int is_lprops_dirty(struct ubifs_info *c, struct ubifs_lprops *lprops) |
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{ |
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struct ubifs_pnode *pnode; |
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int pos; |
|
|
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pos = (lprops->lnum - c->main_first) & (UBIFS_LPT_FANOUT - 1); |
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pnode = (struct ubifs_pnode *)container_of(lprops - pos, |
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struct ubifs_pnode, |
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lprops[0]); |
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return !test_bit(COW_CNODE, &pnode->flags) && |
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test_bit(DIRTY_CNODE, &pnode->flags); |
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} |
|
|
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/** |
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* ubifs_change_lp - change LEB properties. |
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* @c: the UBIFS file-system description object |
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* @lp: LEB properties to change |
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* @free: new free space amount |
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* @dirty: new dirty space amount |
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* @flags: new flags |
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* @idx_gc_cnt: change to the count of @idx_gc list |
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* |
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* This function changes LEB properties (@free, @dirty or @flag). However, the |
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* property which has the %LPROPS_NC value is not changed. Returns a pointer to |
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* the updated LEB properties on success and a negative error code on failure. |
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* |
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* Note, the LEB properties may have had to be copied (due to COW) and |
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* consequently the pointer returned may not be the same as the pointer |
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* passed. |
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*/ |
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const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c, |
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const struct ubifs_lprops *lp, |
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int free, int dirty, int flags, |
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int idx_gc_cnt) |
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{ |
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/* |
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* This is the only function that is allowed to change lprops, so we |
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* discard the "const" qualifier. |
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*/ |
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struct ubifs_lprops *lprops = (struct ubifs_lprops *)lp; |
|
|
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dbg_lp("LEB %d, free %d, dirty %d, flags %d", |
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lprops->lnum, free, dirty, flags); |
|
|
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ubifs_assert(c, mutex_is_locked(&c->lp_mutex)); |
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ubifs_assert(c, c->lst.empty_lebs >= 0 && |
|
c->lst.empty_lebs <= c->main_lebs); |
|
ubifs_assert(c, c->freeable_cnt >= 0); |
|
ubifs_assert(c, c->freeable_cnt <= c->main_lebs); |
|
ubifs_assert(c, c->lst.taken_empty_lebs >= 0); |
|
ubifs_assert(c, c->lst.taken_empty_lebs <= c->lst.empty_lebs); |
|
ubifs_assert(c, !(c->lst.total_free & 7) && !(c->lst.total_dirty & 7)); |
|
ubifs_assert(c, !(c->lst.total_dead & 7) && !(c->lst.total_dark & 7)); |
|
ubifs_assert(c, !(c->lst.total_used & 7)); |
|
ubifs_assert(c, free == LPROPS_NC || free >= 0); |
|
ubifs_assert(c, dirty == LPROPS_NC || dirty >= 0); |
|
|
|
if (!is_lprops_dirty(c, lprops)) { |
|
lprops = ubifs_lpt_lookup_dirty(c, lprops->lnum); |
|
if (IS_ERR(lprops)) |
|
return lprops; |
|
} else |
|
ubifs_assert(c, lprops == ubifs_lpt_lookup_dirty(c, lprops->lnum)); |
|
|
|
ubifs_assert(c, !(lprops->free & 7) && !(lprops->dirty & 7)); |
|
|
|
spin_lock(&c->space_lock); |
|
if ((lprops->flags & LPROPS_TAKEN) && lprops->free == c->leb_size) |
|
c->lst.taken_empty_lebs -= 1; |
|
|
|
if (!(lprops->flags & LPROPS_INDEX)) { |
|
int old_spc; |
|
|
|
old_spc = lprops->free + lprops->dirty; |
|
if (old_spc < c->dead_wm) |
|
c->lst.total_dead -= old_spc; |
|
else |
|
c->lst.total_dark -= ubifs_calc_dark(c, old_spc); |
|
|
|
c->lst.total_used -= c->leb_size - old_spc; |
|
} |
|
|
|
if (free != LPROPS_NC) { |
|
free = ALIGN(free, 8); |
|
c->lst.total_free += free - lprops->free; |
|
|
|
/* Increase or decrease empty LEBs counter if needed */ |
|
if (free == c->leb_size) { |
|
if (lprops->free != c->leb_size) |
|
c->lst.empty_lebs += 1; |
|
} else if (lprops->free == c->leb_size) |
|
c->lst.empty_lebs -= 1; |
|
lprops->free = free; |
|
} |
|
|
|
if (dirty != LPROPS_NC) { |
|
dirty = ALIGN(dirty, 8); |
|
c->lst.total_dirty += dirty - lprops->dirty; |
|
lprops->dirty = dirty; |
|
} |
|
|
|
if (flags != LPROPS_NC) { |
|
/* Take care about indexing LEBs counter if needed */ |
|
if ((lprops->flags & LPROPS_INDEX)) { |
|
if (!(flags & LPROPS_INDEX)) |
|
c->lst.idx_lebs -= 1; |
|
} else if (flags & LPROPS_INDEX) |
|
c->lst.idx_lebs += 1; |
|
lprops->flags = flags; |
|
} |
|
|
|
if (!(lprops->flags & LPROPS_INDEX)) { |
|
int new_spc; |
|
|
|
new_spc = lprops->free + lprops->dirty; |
|
if (new_spc < c->dead_wm) |
|
c->lst.total_dead += new_spc; |
|
else |
|
c->lst.total_dark += ubifs_calc_dark(c, new_spc); |
|
|
|
c->lst.total_used += c->leb_size - new_spc; |
|
} |
|
|
|
if ((lprops->flags & LPROPS_TAKEN) && lprops->free == c->leb_size) |
|
c->lst.taken_empty_lebs += 1; |
|
|
|
change_category(c, lprops); |
|
c->idx_gc_cnt += idx_gc_cnt; |
|
spin_unlock(&c->space_lock); |
|
return lprops; |
|
} |
|
|
|
/** |
|
* ubifs_get_lp_stats - get lprops statistics. |
|
* @c: UBIFS file-system description object |
|
* @lst: return statistics |
|
*/ |
|
void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *lst) |
|
{ |
|
spin_lock(&c->space_lock); |
|
memcpy(lst, &c->lst, sizeof(struct ubifs_lp_stats)); |
|
spin_unlock(&c->space_lock); |
|
} |
|
|
|
/** |
|
* ubifs_change_one_lp - change LEB properties. |
|
* @c: the UBIFS file-system description object |
|
* @lnum: LEB to change properties for |
|
* @free: amount of free space |
|
* @dirty: amount of dirty space |
|
* @flags_set: flags to set |
|
* @flags_clean: flags to clean |
|
* @idx_gc_cnt: change to the count of idx_gc list |
|
* |
|
* This function changes properties of LEB @lnum. It is a helper wrapper over |
|
* 'ubifs_change_lp()' which hides lprops get/release. The arguments are the |
|
* same as in case of 'ubifs_change_lp()'. Returns zero in case of success and |
|
* a negative error code in case of failure. |
|
*/ |
|
int ubifs_change_one_lp(struct ubifs_info *c, int lnum, int free, int dirty, |
|
int flags_set, int flags_clean, int idx_gc_cnt) |
|
{ |
|
int err = 0, flags; |
|
const struct ubifs_lprops *lp; |
|
|
|
ubifs_get_lprops(c); |
|
|
|
lp = ubifs_lpt_lookup_dirty(c, lnum); |
|
if (IS_ERR(lp)) { |
|
err = PTR_ERR(lp); |
|
goto out; |
|
} |
|
|
|
flags = (lp->flags | flags_set) & ~flags_clean; |
|
lp = ubifs_change_lp(c, lp, free, dirty, flags, idx_gc_cnt); |
|
if (IS_ERR(lp)) |
|
err = PTR_ERR(lp); |
|
|
|
out: |
|
ubifs_release_lprops(c); |
|
if (err) |
|
ubifs_err(c, "cannot change properties of LEB %d, error %d", |
|
lnum, err); |
|
return err; |
|
} |
|
|
|
/** |
|
* ubifs_update_one_lp - update LEB properties. |
|
* @c: the UBIFS file-system description object |
|
* @lnum: LEB to change properties for |
|
* @free: amount of free space |
|
* @dirty: amount of dirty space to add |
|
* @flags_set: flags to set |
|
* @flags_clean: flags to clean |
|
* |
|
* This function is the same as 'ubifs_change_one_lp()' but @dirty is added to |
|
* current dirty space, not substitutes it. |
|
*/ |
|
int ubifs_update_one_lp(struct ubifs_info *c, int lnum, int free, int dirty, |
|
int flags_set, int flags_clean) |
|
{ |
|
int err = 0, flags; |
|
const struct ubifs_lprops *lp; |
|
|
|
ubifs_get_lprops(c); |
|
|
|
lp = ubifs_lpt_lookup_dirty(c, lnum); |
|
if (IS_ERR(lp)) { |
|
err = PTR_ERR(lp); |
|
goto out; |
|
} |
|
|
|
flags = (lp->flags | flags_set) & ~flags_clean; |
|
lp = ubifs_change_lp(c, lp, free, lp->dirty + dirty, flags, 0); |
|
if (IS_ERR(lp)) |
|
err = PTR_ERR(lp); |
|
|
|
out: |
|
ubifs_release_lprops(c); |
|
if (err) |
|
ubifs_err(c, "cannot update properties of LEB %d, error %d", |
|
lnum, err); |
|
return err; |
|
} |
|
|
|
/** |
|
* ubifs_read_one_lp - read LEB properties. |
|
* @c: the UBIFS file-system description object |
|
* @lnum: LEB to read properties for |
|
* @lp: where to store read properties |
|
* |
|
* This helper function reads properties of a LEB @lnum and stores them in @lp. |
|
* Returns zero in case of success and a negative error code in case of |
|
* failure. |
|
*/ |
|
int ubifs_read_one_lp(struct ubifs_info *c, int lnum, struct ubifs_lprops *lp) |
|
{ |
|
int err = 0; |
|
const struct ubifs_lprops *lpp; |
|
|
|
ubifs_get_lprops(c); |
|
|
|
lpp = ubifs_lpt_lookup(c, lnum); |
|
if (IS_ERR(lpp)) { |
|
err = PTR_ERR(lpp); |
|
ubifs_err(c, "cannot read properties of LEB %d, error %d", |
|
lnum, err); |
|
goto out; |
|
} |
|
|
|
memcpy(lp, lpp, sizeof(struct ubifs_lprops)); |
|
|
|
out: |
|
ubifs_release_lprops(c); |
|
return err; |
|
} |
|
|
|
/** |
|
* ubifs_fast_find_free - try to find a LEB with free space quickly. |
|
* @c: the UBIFS file-system description object |
|
* |
|
* This function returns LEB properties for a LEB with free space or %NULL if |
|
* the function is unable to find a LEB quickly. |
|
*/ |
|
const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c) |
|
{ |
|
struct ubifs_lprops *lprops; |
|
struct ubifs_lpt_heap *heap; |
|
|
|
ubifs_assert(c, mutex_is_locked(&c->lp_mutex)); |
|
|
|
heap = &c->lpt_heap[LPROPS_FREE - 1]; |
|
if (heap->cnt == 0) |
|
return NULL; |
|
|
|
lprops = heap->arr[0]; |
|
ubifs_assert(c, !(lprops->flags & LPROPS_TAKEN)); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_INDEX)); |
|
return lprops; |
|
} |
|
|
|
/** |
|
* ubifs_fast_find_empty - try to find an empty LEB quickly. |
|
* @c: the UBIFS file-system description object |
|
* |
|
* This function returns LEB properties for an empty LEB or %NULL if the |
|
* function is unable to find an empty LEB quickly. |
|
*/ |
|
const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c) |
|
{ |
|
struct ubifs_lprops *lprops; |
|
|
|
ubifs_assert(c, mutex_is_locked(&c->lp_mutex)); |
|
|
|
if (list_empty(&c->empty_list)) |
|
return NULL; |
|
|
|
lprops = list_entry(c->empty_list.next, struct ubifs_lprops, list); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_TAKEN)); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_INDEX)); |
|
ubifs_assert(c, lprops->free == c->leb_size); |
|
return lprops; |
|
} |
|
|
|
/** |
|
* ubifs_fast_find_freeable - try to find a freeable LEB quickly. |
|
* @c: the UBIFS file-system description object |
|
* |
|
* This function returns LEB properties for a freeable LEB or %NULL if the |
|
* function is unable to find a freeable LEB quickly. |
|
*/ |
|
const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c) |
|
{ |
|
struct ubifs_lprops *lprops; |
|
|
|
ubifs_assert(c, mutex_is_locked(&c->lp_mutex)); |
|
|
|
if (list_empty(&c->freeable_list)) |
|
return NULL; |
|
|
|
lprops = list_entry(c->freeable_list.next, struct ubifs_lprops, list); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_TAKEN)); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_INDEX)); |
|
ubifs_assert(c, lprops->free + lprops->dirty == c->leb_size); |
|
ubifs_assert(c, c->freeable_cnt > 0); |
|
return lprops; |
|
} |
|
|
|
/** |
|
* ubifs_fast_find_frdi_idx - try to find a freeable index LEB quickly. |
|
* @c: the UBIFS file-system description object |
|
* |
|
* This function returns LEB properties for a freeable index LEB or %NULL if the |
|
* function is unable to find a freeable index LEB quickly. |
|
*/ |
|
const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c) |
|
{ |
|
struct ubifs_lprops *lprops; |
|
|
|
ubifs_assert(c, mutex_is_locked(&c->lp_mutex)); |
|
|
|
if (list_empty(&c->frdi_idx_list)) |
|
return NULL; |
|
|
|
lprops = list_entry(c->frdi_idx_list.next, struct ubifs_lprops, list); |
|
ubifs_assert(c, !(lprops->flags & LPROPS_TAKEN)); |
|
ubifs_assert(c, (lprops->flags & LPROPS_INDEX)); |
|
ubifs_assert(c, lprops->free + lprops->dirty == c->leb_size); |
|
return lprops; |
|
} |
|
|
|
/* |
|
* Everything below is related to debugging. |
|
*/ |
|
|
|
/** |
|
* dbg_check_cats - check category heaps and lists. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function returns %0 on success and a negative error code on failure. |
|
*/ |
|
int dbg_check_cats(struct ubifs_info *c) |
|
{ |
|
struct ubifs_lprops *lprops; |
|
struct list_head *pos; |
|
int i, cat; |
|
|
|
if (!dbg_is_chk_gen(c) && !dbg_is_chk_lprops(c)) |
|
return 0; |
|
|
|
list_for_each_entry(lprops, &c->empty_list, list) { |
|
if (lprops->free != c->leb_size) { |
|
ubifs_err(c, "non-empty LEB %d on empty list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
if (lprops->flags & LPROPS_TAKEN) { |
|
ubifs_err(c, "taken LEB %d on empty list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
i = 0; |
|
list_for_each_entry(lprops, &c->freeable_list, list) { |
|
if (lprops->free + lprops->dirty != c->leb_size) { |
|
ubifs_err(c, "non-freeable LEB %d on freeable list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
if (lprops->flags & LPROPS_TAKEN) { |
|
ubifs_err(c, "taken LEB %d on freeable list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
i += 1; |
|
} |
|
if (i != c->freeable_cnt) { |
|
ubifs_err(c, "freeable list count %d expected %d", i, |
|
c->freeable_cnt); |
|
return -EINVAL; |
|
} |
|
|
|
i = 0; |
|
list_for_each(pos, &c->idx_gc) |
|
i += 1; |
|
if (i != c->idx_gc_cnt) { |
|
ubifs_err(c, "idx_gc list count %d expected %d", i, |
|
c->idx_gc_cnt); |
|
return -EINVAL; |
|
} |
|
|
|
list_for_each_entry(lprops, &c->frdi_idx_list, list) { |
|
if (lprops->free + lprops->dirty != c->leb_size) { |
|
ubifs_err(c, "non-freeable LEB %d on frdi_idx list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
if (lprops->flags & LPROPS_TAKEN) { |
|
ubifs_err(c, "taken LEB %d on frdi_idx list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
if (!(lprops->flags & LPROPS_INDEX)) { |
|
ubifs_err(c, "non-index LEB %d on frdi_idx list (free %d dirty %d flags %d)", |
|
lprops->lnum, lprops->free, lprops->dirty, |
|
lprops->flags); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
for (cat = 1; cat <= LPROPS_HEAP_CNT; cat++) { |
|
struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1]; |
|
|
|
for (i = 0; i < heap->cnt; i++) { |
|
lprops = heap->arr[i]; |
|
if (!lprops) { |
|
ubifs_err(c, "null ptr in LPT heap cat %d", cat); |
|
return -EINVAL; |
|
} |
|
if (lprops->hpos != i) { |
|
ubifs_err(c, "bad ptr in LPT heap cat %d", cat); |
|
return -EINVAL; |
|
} |
|
if (lprops->flags & LPROPS_TAKEN) { |
|
ubifs_err(c, "taken LEB in LPT heap cat %d", cat); |
|
return -EINVAL; |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat, |
|
int add_pos) |
|
{ |
|
int i = 0, j, err = 0; |
|
|
|
if (!dbg_is_chk_gen(c) && !dbg_is_chk_lprops(c)) |
|
return; |
|
|
|
for (i = 0; i < heap->cnt; i++) { |
|
struct ubifs_lprops *lprops = heap->arr[i]; |
|
struct ubifs_lprops *lp; |
|
|
|
if (i != add_pos) |
|
if ((lprops->flags & LPROPS_CAT_MASK) != cat) { |
|
err = 1; |
|
goto out; |
|
} |
|
if (lprops->hpos != i) { |
|
err = 2; |
|
goto out; |
|
} |
|
lp = ubifs_lpt_lookup(c, lprops->lnum); |
|
if (IS_ERR(lp)) { |
|
err = 3; |
|
goto out; |
|
} |
|
if (lprops != lp) { |
|
ubifs_err(c, "lprops %zx lp %zx lprops->lnum %d lp->lnum %d", |
|
(size_t)lprops, (size_t)lp, lprops->lnum, |
|
lp->lnum); |
|
err = 4; |
|
goto out; |
|
} |
|
for (j = 0; j < i; j++) { |
|
lp = heap->arr[j]; |
|
if (lp == lprops) { |
|
err = 5; |
|
goto out; |
|
} |
|
if (lp->lnum == lprops->lnum) { |
|
err = 6; |
|
goto out; |
|
} |
|
} |
|
} |
|
out: |
|
if (err) { |
|
ubifs_err(c, "failed cat %d hpos %d err %d", cat, i, err); |
|
dump_stack(); |
|
ubifs_dump_heap(c, heap, cat); |
|
} |
|
} |
|
|
|
/** |
|
* scan_check_cb - scan callback. |
|
* @c: the UBIFS file-system description object |
|
* @lp: LEB properties to scan |
|
* @in_tree: whether the LEB properties are in main memory |
|
* @lst: lprops statistics to update |
|
* |
|
* This function returns a code that indicates whether the scan should continue |
|
* (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree |
|
* in main memory (%LPT_SCAN_ADD), or whether the scan should stop |
|
* (%LPT_SCAN_STOP). |
|
*/ |
|
static int scan_check_cb(struct ubifs_info *c, |
|
const struct ubifs_lprops *lp, int in_tree, |
|
struct ubifs_lp_stats *lst) |
|
{ |
|
struct ubifs_scan_leb *sleb; |
|
struct ubifs_scan_node *snod; |
|
int cat, lnum = lp->lnum, is_idx = 0, used = 0, free, dirty, ret; |
|
void *buf = NULL; |
|
|
|
cat = lp->flags & LPROPS_CAT_MASK; |
|
if (cat != LPROPS_UNCAT) { |
|
cat = ubifs_categorize_lprops(c, lp); |
|
if (cat != (lp->flags & LPROPS_CAT_MASK)) { |
|
ubifs_err(c, "bad LEB category %d expected %d", |
|
(lp->flags & LPROPS_CAT_MASK), cat); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
/* Check lp is on its category list (if it has one) */ |
|
if (in_tree) { |
|
struct list_head *list = NULL; |
|
|
|
switch (cat) { |
|
case LPROPS_EMPTY: |
|
list = &c->empty_list; |
|
break; |
|
case LPROPS_FREEABLE: |
|
list = &c->freeable_list; |
|
break; |
|
case LPROPS_FRDI_IDX: |
|
list = &c->frdi_idx_list; |
|
break; |
|
case LPROPS_UNCAT: |
|
list = &c->uncat_list; |
|
break; |
|
} |
|
if (list) { |
|
struct ubifs_lprops *lprops; |
|
int found = 0; |
|
|
|
list_for_each_entry(lprops, list, list) { |
|
if (lprops == lp) { |
|
found = 1; |
|
break; |
|
} |
|
} |
|
if (!found) { |
|
ubifs_err(c, "bad LPT list (category %d)", cat); |
|
return -EINVAL; |
|
} |
|
} |
|
} |
|
|
|
/* Check lp is on its category heap (if it has one) */ |
|
if (in_tree && cat > 0 && cat <= LPROPS_HEAP_CNT) { |
|
struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1]; |
|
|
|
if ((lp->hpos != -1 && heap->arr[lp->hpos]->lnum != lnum) || |
|
lp != heap->arr[lp->hpos]) { |
|
ubifs_err(c, "bad LPT heap (category %d)", cat); |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
/* |
|
* After an unclean unmount, empty and freeable LEBs |
|
* may contain garbage - do not scan them. |
|
*/ |
|
if (lp->free == c->leb_size) { |
|
lst->empty_lebs += 1; |
|
lst->total_free += c->leb_size; |
|
lst->total_dark += ubifs_calc_dark(c, c->leb_size); |
|
return LPT_SCAN_CONTINUE; |
|
} |
|
if (lp->free + lp->dirty == c->leb_size && |
|
!(lp->flags & LPROPS_INDEX)) { |
|
lst->total_free += lp->free; |
|
lst->total_dirty += lp->dirty; |
|
lst->total_dark += ubifs_calc_dark(c, c->leb_size); |
|
return LPT_SCAN_CONTINUE; |
|
} |
|
|
|
buf = __vmalloc(c->leb_size, GFP_NOFS); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
sleb = ubifs_scan(c, lnum, 0, buf, 0); |
|
if (IS_ERR(sleb)) { |
|
ret = PTR_ERR(sleb); |
|
if (ret == -EUCLEAN) { |
|
ubifs_dump_lprops(c); |
|
ubifs_dump_budg(c, &c->bi); |
|
} |
|
goto out; |
|
} |
|
|
|
is_idx = -1; |
|
list_for_each_entry(snod, &sleb->nodes, list) { |
|
int found, level = 0; |
|
|
|
cond_resched(); |
|
|
|
if (is_idx == -1) |
|
is_idx = (snod->type == UBIFS_IDX_NODE) ? 1 : 0; |
|
|
|
if (is_idx && snod->type != UBIFS_IDX_NODE) { |
|
ubifs_err(c, "indexing node in data LEB %d:%d", |
|
lnum, snod->offs); |
|
goto out_destroy; |
|
} |
|
|
|
if (snod->type == UBIFS_IDX_NODE) { |
|
struct ubifs_idx_node *idx = snod->node; |
|
|
|
key_read(c, ubifs_idx_key(c, idx), &snod->key); |
|
level = le16_to_cpu(idx->level); |
|
} |
|
|
|
found = ubifs_tnc_has_node(c, &snod->key, level, lnum, |
|
snod->offs, is_idx); |
|
if (found) { |
|
if (found < 0) |
|
goto out_destroy; |
|
used += ALIGN(snod->len, 8); |
|
} |
|
} |
|
|
|
free = c->leb_size - sleb->endpt; |
|
dirty = sleb->endpt - used; |
|
|
|
if (free > c->leb_size || free < 0 || dirty > c->leb_size || |
|
dirty < 0) { |
|
ubifs_err(c, "bad calculated accounting for LEB %d: free %d, dirty %d", |
|
lnum, free, dirty); |
|
goto out_destroy; |
|
} |
|
|
|
if (lp->free + lp->dirty == c->leb_size && |
|
free + dirty == c->leb_size) |
|
if ((is_idx && !(lp->flags & LPROPS_INDEX)) || |
|
(!is_idx && free == c->leb_size) || |
|
lp->free == c->leb_size) { |
|
/* |
|
* Empty or freeable LEBs could contain index |
|
* nodes from an uncompleted commit due to an |
|
* unclean unmount. Or they could be empty for |
|
* the same reason. Or it may simply not have been |
|
* unmapped. |
|
*/ |
|
free = lp->free; |
|
dirty = lp->dirty; |
|
is_idx = 0; |
|
} |
|
|
|
if (is_idx && lp->free + lp->dirty == free + dirty && |
|
lnum != c->ihead_lnum) { |
|
/* |
|
* After an unclean unmount, an index LEB could have a different |
|
* amount of free space than the value recorded by lprops. That |
|
* is because the in-the-gaps method may use free space or |
|
* create free space (as a side-effect of using ubi_leb_change |
|
* and not writing the whole LEB). The incorrect free space |
|
* value is not a problem because the index is only ever |
|
* allocated empty LEBs, so there will never be an attempt to |
|
* write to the free space at the end of an index LEB - except |
|
* by the in-the-gaps method for which it is not a problem. |
|
*/ |
|
free = lp->free; |
|
dirty = lp->dirty; |
|
} |
|
|
|
if (lp->free != free || lp->dirty != dirty) |
|
goto out_print; |
|
|
|
if (is_idx && !(lp->flags & LPROPS_INDEX)) { |
|
if (free == c->leb_size) |
|
/* Free but not unmapped LEB, it's fine */ |
|
is_idx = 0; |
|
else { |
|
ubifs_err(c, "indexing node without indexing flag"); |
|
goto out_print; |
|
} |
|
} |
|
|
|
if (!is_idx && (lp->flags & LPROPS_INDEX)) { |
|
ubifs_err(c, "data node with indexing flag"); |
|
goto out_print; |
|
} |
|
|
|
if (free == c->leb_size) |
|
lst->empty_lebs += 1; |
|
|
|
if (is_idx) |
|
lst->idx_lebs += 1; |
|
|
|
if (!(lp->flags & LPROPS_INDEX)) |
|
lst->total_used += c->leb_size - free - dirty; |
|
lst->total_free += free; |
|
lst->total_dirty += dirty; |
|
|
|
if (!(lp->flags & LPROPS_INDEX)) { |
|
int spc = free + dirty; |
|
|
|
if (spc < c->dead_wm) |
|
lst->total_dead += spc; |
|
else |
|
lst->total_dark += ubifs_calc_dark(c, spc); |
|
} |
|
|
|
ubifs_scan_destroy(sleb); |
|
vfree(buf); |
|
return LPT_SCAN_CONTINUE; |
|
|
|
out_print: |
|
ubifs_err(c, "bad accounting of LEB %d: free %d, dirty %d flags %#x, should be free %d, dirty %d", |
|
lnum, lp->free, lp->dirty, lp->flags, free, dirty); |
|
ubifs_dump_leb(c, lnum); |
|
out_destroy: |
|
ubifs_scan_destroy(sleb); |
|
ret = -EINVAL; |
|
out: |
|
vfree(buf); |
|
return ret; |
|
} |
|
|
|
/** |
|
* dbg_check_lprops - check all LEB properties. |
|
* @c: UBIFS file-system description object |
|
* |
|
* This function checks all LEB properties and makes sure they are all correct. |
|
* It returns zero if everything is fine, %-EINVAL if there is an inconsistency |
|
* and other negative error codes in case of other errors. This function is |
|
* called while the file system is locked (because of commit start), so no |
|
* additional locking is required. Note that locking the LPT mutex would cause |
|
* a circular lock dependency with the TNC mutex. |
|
*/ |
|
int dbg_check_lprops(struct ubifs_info *c) |
|
{ |
|
int i, err; |
|
struct ubifs_lp_stats lst; |
|
|
|
if (!dbg_is_chk_lprops(c)) |
|
return 0; |
|
|
|
/* |
|
* As we are going to scan the media, the write buffers have to be |
|
* synchronized. |
|
*/ |
|
for (i = 0; i < c->jhead_cnt; i++) { |
|
err = ubifs_wbuf_sync(&c->jheads[i].wbuf); |
|
if (err) |
|
return err; |
|
} |
|
|
|
memset(&lst, 0, sizeof(struct ubifs_lp_stats)); |
|
err = ubifs_lpt_scan_nolock(c, c->main_first, c->leb_cnt - 1, |
|
(ubifs_lpt_scan_callback)scan_check_cb, |
|
&lst); |
|
if (err && err != -ENOSPC) |
|
goto out; |
|
|
|
if (lst.empty_lebs != c->lst.empty_lebs || |
|
lst.idx_lebs != c->lst.idx_lebs || |
|
lst.total_free != c->lst.total_free || |
|
lst.total_dirty != c->lst.total_dirty || |
|
lst.total_used != c->lst.total_used) { |
|
ubifs_err(c, "bad overall accounting"); |
|
ubifs_err(c, "calculated: empty_lebs %d, idx_lebs %d, total_free %lld, total_dirty %lld, total_used %lld", |
|
lst.empty_lebs, lst.idx_lebs, lst.total_free, |
|
lst.total_dirty, lst.total_used); |
|
ubifs_err(c, "read from lprops: empty_lebs %d, idx_lebs %d, total_free %lld, total_dirty %lld, total_used %lld", |
|
c->lst.empty_lebs, c->lst.idx_lebs, c->lst.total_free, |
|
c->lst.total_dirty, c->lst.total_used); |
|
err = -EINVAL; |
|
goto out; |
|
} |
|
|
|
if (lst.total_dead != c->lst.total_dead || |
|
lst.total_dark != c->lst.total_dark) { |
|
ubifs_err(c, "bad dead/dark space accounting"); |
|
ubifs_err(c, "calculated: total_dead %lld, total_dark %lld", |
|
lst.total_dead, lst.total_dark); |
|
ubifs_err(c, "read from lprops: total_dead %lld, total_dark %lld", |
|
c->lst.total_dead, c->lst.total_dark); |
|
err = -EINVAL; |
|
goto out; |
|
} |
|
|
|
err = dbg_check_cats(c); |
|
out: |
|
return err; |
|
}
|
|
|