diff options
Diffstat (limited to 'fs/ubifs/debug.c')
-rw-r--r-- | fs/ubifs/debug.c | 105 |
1 files changed, 20 insertions, 85 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index 3a73441..1e880ce 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -2539,16 +2539,7 @@ error_dump: #define chance(n, d) (simple_rand() <= (n) * 32768LL / (d)) -struct failure_mode_info { - struct list_head list; - struct ubifs_info *c; -}; - -static LIST_HEAD(fmi_list); -static DEFINE_SPINLOCK(fmi_lock); - static unsigned int next; - static int simple_rand(void) { if (next == 0) @@ -2557,69 +2548,15 @@ static int simple_rand(void) return (next >> 16) & 32767; } -static void failure_mode_init(struct ubifs_info *c) -{ - struct failure_mode_info *fmi; - - fmi = kmalloc(sizeof(struct failure_mode_info), GFP_NOFS); - if (!fmi) { - ubifs_err("Failed to register failure mode - no memory"); - return; - } - fmi->c = c; - spin_lock(&fmi_lock); - list_add_tail(&fmi->list, &fmi_list); - spin_unlock(&fmi_lock); -} - -static void failure_mode_exit(struct ubifs_info *c) -{ - struct failure_mode_info *fmi, *tmp; - - spin_lock(&fmi_lock); - list_for_each_entry_safe(fmi, tmp, &fmi_list, list) - if (fmi->c == c) { - list_del(&fmi->list); - kfree(fmi); - } - spin_unlock(&fmi_lock); -} - -static struct ubifs_info *dbg_find_info(struct ubi_volume_desc *desc) +static int do_fail(struct ubifs_info *c, int lnum, int write) { - struct failure_mode_info *fmi; - - spin_lock(&fmi_lock); - list_for_each_entry(fmi, &fmi_list, list) - if (fmi->c->ubi == desc) { - struct ubifs_info *c = fmi->c; - - spin_unlock(&fmi_lock); - return c; - } - spin_unlock(&fmi_lock); - return NULL; -} - -static int in_failure_mode(struct ubi_volume_desc *desc) -{ - struct ubifs_info *c = dbg_find_info(desc); + struct ubifs_debug_info *d = c->dbg; - if (c && dbg_is_tst_rcvry(c)) - return c->dbg->failure_mode; - return 0; -} + ubifs_assert(dbg_is_tst_rcvry(c)); -static int do_fail(struct ubi_volume_desc *desc, int lnum, int write) -{ - struct ubifs_info *c = dbg_find_info(desc); - struct ubifs_debug_info *d; - - if (!c || !dbg_is_tst_rcvry(c)) - return 0; - d = c->dbg; if (d->failure_mode) return 1; + if (!d->fail_cnt) { /* First call - decide delay to failure */ if (chance(1, 2)) { @@ -2716,17 +2653,17 @@ static void cut_data(const void *buf, int len) p[i] = 0xff; } -int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf, +int dbg_leb_write(struct ubifs_info *c, int lnum, const void *buf, int offs, int len, int dtype) { int err, failing; - if (in_failure_mode(desc)) + if (c->dbg->failure_mode) return -EROFS; - failing = do_fail(desc, lnum, 1); + failing = do_fail(c, lnum, 1); if (failing) cut_data(buf, len); - err = ubi_leb_write(desc, lnum, buf, offs, len, dtype); + err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype); if (err) return err; if (failing) @@ -2734,45 +2671,45 @@ int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf, return 0; } -int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf, +int dbg_leb_change(struct ubifs_info *c, int lnum, const void *buf, int len, int dtype) { int err; - if (do_fail(desc, lnum, 1)) + if (do_fail(c, lnum, 1)) return -EROFS; - err = ubi_leb_change(desc, lnum, buf, len, dtype); + err = ubi_leb_change(c->ubi, lnum, buf, len, dtype); if (err) return err; - if (do_fail(desc, lnum, 1)) + if (do_fail(c, lnum, 1)) return -EROFS; return 0; } -int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum) +int dbg_leb_unmap(struct ubifs_info *c, int lnum) { int err; - if (do_fail(desc, lnum, 0)) + if (do_fail(c, lnum, 0)) return -EROFS; - err = ubi_leb_unmap(desc, lnum); + err = ubi_leb_unmap(c->ubi, lnum); if (err) return err; - if (do_fail(desc, lnum, 0)) + if (do_fail(c, lnum, 0)) return -EROFS; return 0; } -int dbg_leb_map(struct ubi_volume_desc *desc, int lnum, int dtype) +int dbg_leb_map(struct ubifs_info *c, int lnum, int dtype) { int err; - if (do_fail(desc, lnum, 0)) + if (do_fail(c, lnum, 0)) return -EROFS; - err = ubi_leb_map(desc, lnum, dtype); + err = ubi_leb_map(c->ubi, lnum, dtype); if (err) return err; - if (do_fail(desc, lnum, 0)) + if (do_fail(c, lnum, 0)) return -EROFS; return 0; } @@ -3210,7 +3147,6 @@ int ubifs_debugging_init(struct ubifs_info *c) if (!c->dbg) return -ENOMEM; - failure_mode_init(c); return 0; } @@ -3220,7 +3156,6 @@ int ubifs_debugging_init(struct ubifs_info *c) */ void ubifs_debugging_exit(struct ubifs_info *c) { - failure_mode_exit(c); kfree(c->dbg); } |