diff options
| -rw-r--r-- | fs/ubifs/debug.c | 52 | ||||
| -rw-r--r-- | fs/ubifs/debug.h | 22 |
2 files changed, 39 insertions, 35 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 1e880cedefa4..b801af7837e9 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -2548,39 +2548,36 @@ static int simple_rand(void) return (next >> 16) & 32767; } -static int do_fail(struct ubifs_info *c, int lnum, int write) +static int power_cut_emulated(struct ubifs_info *c, int lnum, int write) { struct ubifs_debug_info *d = c->dbg; ubifs_assert(dbg_is_tst_rcvry(c)); - if (d->failure_mode) - return 1; - - if (!d->fail_cnt) { - /* First call - decide delay to failure */ + if (!d->pc_cnt) { + /* First call - decide delay to the power cut */ if (chance(1, 2)) { unsigned int delay = 1 << (simple_rand() >> 11); if (chance(1, 2)) { - d->fail_delay = 1; - d->fail_timeout = jiffies + + d->pc_delay = 1; + d->pc_timeout = jiffies + msecs_to_jiffies(delay); ubifs_warn("failing after %ums", delay); } else { - d->fail_delay = 2; - d->fail_cnt_max = delay; + d->pc_delay = 2; + d->pc_cnt_max = delay; ubifs_warn("failing after %u calls", delay); } } - d->fail_cnt += 1; + d->pc_cnt += 1; } /* Determine if failure delay has expired */ - if (d->fail_delay == 1) { - if (time_before(jiffies, d->fail_timeout)) + if (d->pc_delay == 1) { + if (time_before(jiffies, d->pc_timeout)) return 0; - } else if (d->fail_delay == 2) - if (d->fail_cnt++ < d->fail_cnt_max) + } else if (d->pc_delay == 2) + if (d->pc_cnt++ < d->pc_cnt_max) return 0; if (lnum == UBIFS_SB_LNUM) { if (write) { @@ -2638,7 +2635,7 @@ static int do_fail(struct ubifs_info *c, int lnum, int write) ubifs_warn("failing in bud LEB %d commit not running", lnum); } - d->failure_mode = 1; + d->pc_happened = 1; dump_stack(); return 1; } @@ -2658,9 +2655,10 @@ int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf, { int err, failing; - if (c->dbg->failure_mode) + if (c->dbg->pc_happened) return -EROFS; - failing = do_fail(c, lnum, 1); + + failing = power_cut_emulated(c, lnum, 1); if (failing) cut_data(buf, len); err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype); @@ -2676,12 +2674,14 @@ int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf, { int err; - if (do_fail(c, lnum, 1)) + if (c->dbg->pc_happened) + return -EROFS; + if (power_cut_emulated(c, lnum, 1)) return -EROFS; err = ubi_leb_change(c->ubi, lnum, buf, len, dtype); if (err) return err; - if (do_fail(c, lnum, 1)) + if (power_cut_emulated(c, lnum, 1)) return -EROFS; return 0; } @@ -2690,12 +2690,14 @@ int dbg_leb_unmap(struct ubifs_info *c, int lnum) { int err; - if (do_fail(c, lnum, 0)) + if (c->dbg->pc_happened) + return -EROFS; + if (power_cut_emulated(c, lnum, 0)) return -EROFS; err = ubi_leb_unmap(c->ubi, lnum); if (err) return err; - if (do_fail(c, lnum, 0)) + if (power_cut_emulated(c, lnum, 0)) return -EROFS; return 0; } @@ -2704,12 +2706,14 @@ int dbg_leb_map(struct ubifs_info *c, int lnum, int dtype) { int err; - if (do_fail(c, lnum, 0)) + if (c->dbg->pc_happened) + return -EROFS; + if (power_cut_emulated(c, lnum, 0)) return -EROFS; err = ubi_leb_map(c->ubi, lnum, dtype); if (err) return err; - if (do_fail(c, lnum, 0)) + if (power_cut_emulated(c, lnum, 0)) return -EROFS; return 0; } diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h index 0ab3757ef0e3..45174b534377 100644 --- a/fs/ubifs/debug.h +++ b/fs/ubifs/debug.h @@ -44,11 +44,11 @@ typedef int (*dbg_znode_callback)(struct ubifs_info *c, * @old_zroot_level: old index root level - used by 'dbg_check_old_index()' * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()' * - * @failure_mode: failure mode for recovery testing - * @fail_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls - * @fail_timeout: time in jiffies when delay of failure mode expires - * @fail_cnt: current number of calls to failure mode I/O functions - * @fail_cnt_max: number of calls by which to delay failure mode + * @pc_happened: non-zero if an emulated power cut happened + * @pc_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls + * @pc_timeout: time in jiffies when delay of failure mode expires + * @pc_cnt: current number of calls to failure mode I/O functions + * @pc_cnt_max: number of calls by which to delay failure mode * * @chk_lpt_sz: used by LPT tree size checker * @chk_lpt_sz2: used by LPT tree size checker @@ -87,11 +87,11 @@ struct ubifs_debug_info { int old_zroot_level; unsigned long long old_zroot_sqnum; - int failure_mode; - int fail_delay; - unsigned long fail_timeout; - unsigned int fail_cnt; - unsigned int fail_cnt_max; + int pc_happened; + int pc_delay; + unsigned long pc_timeout; + unsigned int pc_cnt; + unsigned int pc_cnt_max; long long chk_lpt_sz; long long chk_lpt_sz2; @@ -246,7 +246,7 @@ static inline int dbg_is_tst_rcvry(const struct ubifs_info *c) } static inline int dbg_is_power_cut(const struct ubifs_info *c) { - return !!c->dbg->failure_mode; + return !!c->dbg->pc_happened; } int ubifs_debugging_init(struct ubifs_info *c); |