diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ubifs/lpt_commit.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c index 9fe376a039cd..dfcb5748a7dc 100644 --- a/fs/ubifs/lpt_commit.c +++ b/fs/ubifs/lpt_commit.c @@ -29,6 +29,12 @@ #include <linux/slab.h> #include "ubifs.h" +#ifdef CONFIG_UBIFS_FS_DEBUG +static int dbg_populate_lsave(struct ubifs_info *c); +#else +#define dbg_populate_lsave(c) 0 +#endif + /** * first_dirty_cnode - find first dirty cnode. * @c: UBIFS file-system description object @@ -815,6 +821,10 @@ static void populate_lsave(struct ubifs_info *c) c->lpt_drty_flgs |= LSAVE_DIRTY; ubifs_add_lpt_dirt(c, c->lsave_lnum, c->lsave_sz); } + + if (dbg_populate_lsave(c)) + return; + list_for_each_entry(lprops, &c->empty_list, list) { c->lsave[cnt++] = lprops->lnum; if (cnt >= c->lsave_cnt) @@ -1994,4 +2004,47 @@ void dbg_dump_lpt_lebs(const struct ubifs_info *c) current->pid); } +/** + * dbg_populate_lsave - debugging version of 'populate_lsave()' + * @c: UBIFS file-system description object + * + * This is a debugging version for 'populate_lsave()' which populates lsave + * with random LEBs instead of useful LEBs, which is good for test coverage. + * Returns zero if lsave has not been populated (this debugging feature is + * disabled) an non-zero if lsave has been populated. + */ +static int dbg_populate_lsave(struct ubifs_info *c) +{ + struct ubifs_lprops *lprops; + struct ubifs_lpt_heap *heap; + int i; + + if (!(ubifs_chk_flags & UBIFS_CHK_GEN)) + return 0; + if (random32() & 3) + return 0; + + for (i = 0; i < c->lsave_cnt; i++) + c->lsave[i] = c->main_first; + + list_for_each_entry(lprops, &c->empty_list, list) + c->lsave[random32() % c->lsave_cnt] = lprops->lnum; + list_for_each_entry(lprops, &c->freeable_list, list) + c->lsave[random32() % c->lsave_cnt] = lprops->lnum; + list_for_each_entry(lprops, &c->frdi_idx_list, list) + c->lsave[random32() % c->lsave_cnt] = lprops->lnum; + + heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1]; + for (i = 0; i < heap->cnt; i++) + c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum; + heap = &c->lpt_heap[LPROPS_DIRTY - 1]; + for (i = 0; i < heap->cnt; i++) + c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum; + heap = &c->lpt_heap[LPROPS_FREE - 1]; + for (i = 0; i < heap->cnt; i++) + c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum; + + return 1; +} + #endif /* CONFIG_UBIFS_FS_DEBUG */ |