From b221337ae4ef9baff84d6d5ecb806e79a5597329 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Sun, 15 Mar 2009 17:20:22 +0200 Subject: UBIFS: fix bogus assertion Empty journal head LEBs are accounted as taken empty as well, so the GC LEB does not have to be the only taken empty LEB when nounting/remounting. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 1182b66a5491..03cd9ac4dcb2 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1318,11 +1318,15 @@ static int mount_ubifs(struct ubifs_info *c) else { c->need_recovery = 0; ubifs_msg("recovery completed"); - /* GC LEB has to be empty and taken at this point */ - ubifs_assert(c->lst.taken_empty_lebs == 1); + /* + * GC LEB has to be empty and taken at this point. But + * the journal head LEBs may also be accounted as + * "empty taken" if they are empty. + */ + ubifs_assert(c->lst.taken_empty_lebs > 0); } } else - ubifs_assert(c->lst.taken_empty_lebs == 1); + ubifs_assert(c->lst.taken_empty_lebs > 0); err = dbg_check_filesystem(c); if (err) @@ -1775,7 +1779,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data) c->bu.buf = NULL; } - ubifs_assert(c->lst.taken_empty_lebs == 1); + ubifs_assert(c->lst.taken_empty_lebs > 0); return 0; } -- cgit v1.2.2 From fb1cd01a33ecb8a49d590c034ba146dff80c5597 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Mon, 16 Mar 2009 09:56:57 +0200 Subject: UBIFS: introduce a helpful variable This patch introduces a helpful @c->idx_leb_size variable. The patch also fixes some spelling issues and makes comments use "LEB" instead of "eraseblock", which is more correct. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 03cd9ac4dcb2..7bdd248ec770 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -700,6 +700,8 @@ static int init_constants_sb(struct ubifs_info *c) if (err) return err; + /* Initialize effective LEB size used in budgeting calculations */ + c->idx_leb_size = c->leb_size - c->max_idx_node_sz; return 0; } @@ -716,6 +718,7 @@ static void init_constants_master(struct ubifs_info *c) long long tmp64; c->min_idx_lebs = ubifs_calc_min_idx_lebs(c); + c->report_rp_size = ubifs_reported_space(c, c->rp_size); /* * Calculate total amount of FS blocks. This number is not used -- cgit v1.2.2 From fcabb3479e2b15abfd2d2ef5363295f16e98b2d7 Mon Sep 17 00:00:00 2001 From: Hunter Adrian Date: Wed, 18 Mar 2009 12:29:39 +0100 Subject: UBIFS: fix compiler warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit fs/ubifs/super.c: In function ‘ubifs_show_options’: fs/ubifs/super.c:425: warning: format not a string literal and no format arguments fs/ubifs/super.c: In function ‘mount_ubifs’: fs/ubifs/super.c:1204: warning: format not a string literal and no format arguments fs/ubifs/super.c: In function ‘ubifs_remount_rw’: fs/ubifs/super.c:1557: warning: format not a string literal and no format arguments Signed-off-by: Adrian Hunter Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 7bdd248ec770..372c7fb66531 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -421,8 +421,8 @@ static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt) seq_printf(s, ",no_chk_data_crc"); if (c->mount_opts.override_compr) { - seq_printf(s, ",compr="); - seq_printf(s, ubifs_compr_name(c->mount_opts.compr_type)); + seq_printf(s, ",compr=%s", + ubifs_compr_name(c->mount_opts.compr_type)); } return 0; @@ -1204,7 +1204,7 @@ static int mount_ubifs(struct ubifs_info *c) goto out_cbuf; /* Create background thread */ - c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name); + c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name); if (IS_ERR(c->bgt)) { err = PTR_ERR(c->bgt); c->bgt = NULL; @@ -1561,7 +1561,7 @@ static int ubifs_remount_rw(struct ubifs_info *c) ubifs_create_buds_lists(c); /* Create background thread */ - c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name); + c->bgt = kthread_create(ubifs_bg_thread, c, "%s", c->bgt_name); if (IS_ERR(c->bgt)) { err = PTR_ERR(c->bgt); c->bgt = NULL; -- cgit v1.2.2 From 963f0cf6d116d83c558a8efe9045c1c5ad7aed34 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Thu, 26 Mar 2009 12:51:21 +0200 Subject: UBIFS: add R/O compatibility Now UBIFS is supported by u-boot. If we ever decide to change the media format, then people will have to upgrade their u-boots to mount new format images. However, very often it is possible to preserve R/O forward-compatibility, even though the write forward-compatibility is not preserved. This patch introduces a new super-block field which stores the R/O compatibility version. Signed-off-by: Artem Bityutskiy Acked-by: Adrian Hunter --- fs/ubifs/super.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 372c7fb66531..302a2056422e 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1351,8 +1351,9 @@ static int mount_ubifs(struct ubifs_info *c) x = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes; ubifs_msg("journal size: %lld bytes (%lld KiB, %lld MiB, %d " "LEBs)", x, x >> 10, x >> 20, c->log_lebs + c->max_bud_cnt); - ubifs_msg("media format: %d (latest is %d)", - c->fmt_version, UBIFS_FORMAT_VERSION); + ubifs_msg("media format: w%d/r%d (latest is w%d/r%d)", + c->fmt_version, c->ro_compat_version, + UBIFS_FORMAT_VERSION, UBIFS_RO_COMPAT_VERSION); ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr)); ubifs_msg("reserved for root: %llu bytes (%llu KiB)", c->report_rp_size, c->report_rp_size >> 10); @@ -1492,6 +1493,15 @@ static int ubifs_remount_rw(struct ubifs_info *c) { int err, lnum; + if (c->rw_incompat) { + ubifs_err("the file-system is not R/W-compatible"); + ubifs_msg("on-flash format version is w%d/r%d, but software " + "only supports up to version w%d/r%d", c->fmt_version, + c->ro_compat_version, UBIFS_FORMAT_VERSION, + UBIFS_RO_COMPAT_VERSION); + return -EROFS; + } + mutex_lock(&c->umount_mutex); dbg_save_space_info(c); c->remounting_rw = 1; -- cgit v1.2.2