diff options
| -rw-r--r-- | fs/ubifs/io.c | 12 | ||||
| -rw-r--r-- | fs/ubifs/super.c | 11 | ||||
| -rw-r--r-- | fs/ubifs/tnc.c | 10 | ||||
| -rw-r--r-- | fs/ubifs/ubifs.h | 5 |
4 files changed, 19 insertions, 19 deletions
diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c index d82173182eeb..d1fe56203a1d 100644 --- a/fs/ubifs/io.c +++ b/fs/ubifs/io.c @@ -88,8 +88,12 @@ void ubifs_ro_mode(struct ubifs_info *c, int err) * This function may skip data nodes CRC checking if @c->no_chk_data_crc is * true, which is controlled by corresponding UBIFS mount option. However, if * @must_chk_crc is true, then @c->no_chk_data_crc is ignored and CRC is - * checked. Similarly, if @c->always_chk_crc is true, @c->no_chk_data_crc is - * ignored and CRC is checked. + * checked. Similarly, if @c->mounting or @c->remounting_rw is true (we are + * mounting or re-mounting to R/W mode), @c->no_chk_data_crc is ignored and CRC + * is checked. This is because during mounting or re-mounting from R/O mode to + * R/W mode we may read journal nodes (when replying the journal or doing the + * recovery) and the journal nodes may potentially be corrupted, so checking is + * required. * * This function returns zero in case of success and %-EUCLEAN in case of bad * CRC or magic. @@ -131,8 +135,8 @@ int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum, node_len > c->ranges[type].max_len) goto out_len; - if (!must_chk_crc && type == UBIFS_DATA_NODE && !c->always_chk_crc && - c->no_chk_data_crc) + if (!must_chk_crc && type == UBIFS_DATA_NODE && !c->mounting && + !c->remounting_rw && c->no_chk_data_crc) return 0; crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8); diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 91fac54c70e3..703a62109cf2 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1194,11 +1194,7 @@ static int mount_ubifs(struct ubifs_info *c) if (c->bulk_read == 1) bu_init(c); - /* - * We have to check all CRCs, even for data nodes, when we mount the FS - * (specifically, when we are replaying). - */ - c->always_chk_crc = 1; + c->mounting = 1; err = ubifs_read_superblock(c); if (err) @@ -1374,7 +1370,7 @@ static int mount_ubifs(struct ubifs_info *c) if (err) goto out_infos; - c->always_chk_crc = 0; + c->mounting = 0; ubifs_msg("mounted UBI device %d, volume %d, name \"%s\"", c->vi.ubi_num, c->vi.vol_id, c->vi.name); @@ -1535,7 +1531,6 @@ static int ubifs_remount_rw(struct ubifs_info *c) mutex_lock(&c->umount_mutex); dbg_save_space_info(c); c->remounting_rw = 1; - c->always_chk_crc = 1; err = check_free_space(c); if (err) @@ -1642,7 +1637,6 @@ static int ubifs_remount_rw(struct ubifs_info *c) dbg_gen("re-mounted read-write"); c->ro_mount = 0; c->remounting_rw = 0; - c->always_chk_crc = 0; err = dbg_check_space_info(c); mutex_unlock(&c->umount_mutex); return err; @@ -1659,7 +1653,6 @@ out: c->ileb_buf = NULL; ubifs_lpt_free(c, 1); c->remounting_rw = 0; - c->always_chk_crc = 0; mutex_unlock(&c->umount_mutex); return err; } diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c index ad9cf0133622..de485979ca39 100644 --- a/fs/ubifs/tnc.c +++ b/fs/ubifs/tnc.c @@ -447,8 +447,11 @@ static int tnc_read_node_nm(struct ubifs_info *c, struct ubifs_zbranch *zbr, * * Note, this function does not check CRC of data nodes if @c->no_chk_data_crc * is true (it is controlled by corresponding mount option). However, if - * @c->always_chk_crc is true, @c->no_chk_data_crc is ignored and CRC is always - * checked. + * @c->mounting or @c->remounting_rw is true (we are mounting or re-mounting to + * R/W mode), @c->no_chk_data_crc is ignored and CRC is checked. This is + * because during mounting or re-mounting from R/O mode to R/W mode we may read + * journal nodes (when replying the journal or doing the recovery) and the + * journal nodes may potentially be corrupted, so checking is required. */ static int try_read_node(const struct ubifs_info *c, void *buf, int type, int len, int lnum, int offs) @@ -476,7 +479,8 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type, if (node_len != len) return 0; - if (type == UBIFS_DATA_NODE && !c->always_chk_crc && c->no_chk_data_crc) + if (type == UBIFS_DATA_NODE && c->no_chk_data_crc && !c->mounting && + !c->remounting_rw) return 1; crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8); diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h index d1efa37d80ae..d1823541f987 100644 --- a/fs/ubifs/ubifs.h +++ b/fs/ubifs/ubifs.h @@ -1169,9 +1169,8 @@ struct ubifs_debug_info; * @empty: %1 if the UBI device is empty * @need_recovery: %1 if the file-system needs recovery * @replaying: %1 during journal replay + * @mounting: %1 while mounting * @remounting_rw: %1 while re-mounting from R/O mode to R/W mode - * @always_chk_crc: always check CRCs (while mounting and remounting to R/W - * mode) * @replay_tree: temporary tree used during journal replay * @replay_list: temporary list used during journal replay * @replay_buds: list of buds to replay @@ -1405,8 +1404,8 @@ struct ubifs_info { unsigned int empty:1; unsigned int need_recovery:1; unsigned int replaying:1; + unsigned int mounting:1; unsigned int remounting_rw:1; - unsigned int always_chk_crc:1; struct rb_root replay_tree; struct list_head replay_list; struct list_head replay_buds; |