From 948cfb219bbbc3c8e1b10a671ca88219fa42a052 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Wed, 20 Aug 2008 11:56:33 +0300 Subject: UBIFS: add a print, fix comments and more minor stuff This commit adds a reserved pool size print and tweaks the prints to make them look nicer. It also fixes and cleans-up some comments. Additionally, it deletes some blank lines to make the code look a little nicer. In other words, nothing essential. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 3f4902060c7a..667c72d8a5cc 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1144,19 +1144,21 @@ static int mount_ubifs(struct ubifs_info *c) if (mounted_read_only) ubifs_msg("mounted read-only"); x = (long long)c->main_lebs * c->leb_size; - ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, %d LEBs)", - x, x >> 10, x >> 20, c->main_lebs); + ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, %d " + "LEBs)", x, x >> 10, x >> 20, c->main_lebs); 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("default compressor: %s", ubifs_compr_name(c->default_compr)); - ubifs_msg("media format %d, latest format %d", + 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("default compressor: %s", ubifs_compr_name(c->default_compr)); + ubifs_msg("reserved pool size: %llu bytes (%llu KiB)", + c->report_rp_size, c->report_rp_size >> 10); dbg_msg("compiled on: " __DATE__ " at " __TIME__); dbg_msg("min. I/O unit size: %d bytes", c->min_io_size); dbg_msg("LEB size: %d bytes (%d KiB)", - c->leb_size, c->leb_size / 1024); + c->leb_size, c->leb_size >> 10); dbg_msg("data journal heads: %d", c->jhead_cnt - NONDATA_JHEADS_CNT); dbg_msg("UUID: %02X%02X%02X%02X-%02X%02X" -- cgit v1.2.3 From a70948b564e9f6cb81115c606d46f5b74a77b7c2 Mon Sep 17 00:00:00 2001 From: Julien Brunel Date: Fri, 29 Aug 2008 11:08:32 +0200 Subject: UBIFS: use an IS_ERR test rather than a NULL test In case of error, the function kthread_create returns an ERR pointer, but never returns a NULL pointer. So a NULL test that comes before an IS_ERR test should be deleted. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @match_bad_null_test@ expression x, E; statement S1,S2; @@ x = kthread_create(...) ... when != x = E * if (x == NULL) S1 else S2 // Signed-off-by: Julien Brunel Signed-off-by: Julia Lawall Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 667c72d8a5cc..d87b0cf5f661 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1032,8 +1032,6 @@ static int mount_ubifs(struct ubifs_info *c) /* Create background thread */ c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name); - if (!c->bgt) - c->bgt = ERR_PTR(-EINVAL); if (IS_ERR(c->bgt)) { err = PTR_ERR(c->bgt); c->bgt = NULL; @@ -1347,8 +1345,6 @@ static int ubifs_remount_rw(struct ubifs_info *c) /* Create background thread */ c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name); - if (!c->bgt) - c->bgt = ERR_PTR(-EINVAL); if (IS_ERR(c->bgt)) { err = PTR_ERR(c->bgt); c->bgt = NULL; -- cgit v1.2.3 From 4793e7c5e1c88382ead18db5ca072bac54467318 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 2 Sep 2008 16:29:46 +0300 Subject: UBIFS: add bulk-read facility Some flash media are capable of reading sequentially at faster rates. UBIFS bulk-read facility is designed to take advantage of that, by reading in one go consecutive data nodes that are also located consecutively in the same LEB. Read speed on Arm platform with OneNAND goes from 17 MiB/s to 19 MiB/s. Signed-off-by: Adrian Hunter --- fs/ubifs/super.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index d87b0cf5f661..b1c57e8ee855 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -401,6 +401,11 @@ static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt) else if (c->mount_opts.unmount_mode == 1) seq_printf(s, ",norm_unmount"); + if (c->mount_opts.bulk_read == 2) + seq_printf(s, ",bulk_read"); + else if (c->mount_opts.bulk_read == 1) + seq_printf(s, ",no_bulk_read"); + return 0; } @@ -538,6 +543,18 @@ static int init_constants_early(struct ubifs_info *c) * calculations when reporting free space. */ c->leb_overhead = c->leb_size % UBIFS_MAX_DATA_NODE_SZ; + /* Buffer size for bulk-reads */ + c->bulk_read_buf_size = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ; + if (c->bulk_read_buf_size > c->leb_size) + c->bulk_read_buf_size = c->leb_size; + if (c->bulk_read_buf_size > 128 * 1024) { + /* Check if we can kmalloc more than 128KiB */ + void *try = kmalloc(c->bulk_read_buf_size, GFP_KERNEL); + + kfree(try); + if (!try) + c->bulk_read_buf_size = 128 * 1024; + } return 0; } @@ -840,17 +857,23 @@ static int check_volume_empty(struct ubifs_info *c) * * Opt_fast_unmount: do not run a journal commit before un-mounting * Opt_norm_unmount: run a journal commit before un-mounting + * Opt_bulk_read: enable bulk-reads + * Opt_no_bulk_read: disable bulk-reads * Opt_err: just end of array marker */ enum { Opt_fast_unmount, Opt_norm_unmount, + Opt_bulk_read, + Opt_no_bulk_read, Opt_err, }; static match_table_t tokens = { {Opt_fast_unmount, "fast_unmount"}, {Opt_norm_unmount, "norm_unmount"}, + {Opt_bulk_read, "bulk_read"}, + {Opt_no_bulk_read, "no_bulk_read"}, {Opt_err, NULL}, }; @@ -888,6 +911,14 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options, c->mount_opts.unmount_mode = 1; c->fast_unmount = 0; break; + case Opt_bulk_read: + c->mount_opts.bulk_read = 2; + c->bulk_read = 1; + break; + case Opt_no_bulk_read: + c->mount_opts.bulk_read = 1; + c->bulk_read = 0; + break; default: ubifs_err("unrecognized mount option \"%s\" " "or missing value", p); -- cgit v1.2.3 From 2953e73f1ce4b3284b409aefb9d46bbde6515c37 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 4 Sep 2008 16:26:00 +0300 Subject: UBIFS: add no_chk_data_crc mount option UBIFS read performance can be improved by skipping the CRC check when data nodes are read. This option can be used if the underlying media is considered to be highly reliable. Note that CRCs are always checked for metadata. Read speed on Arm platform with OneNAND goes from 19 MiB/s to 27 MiB/s with data CRC checking disabled. Signed-off-by: Adrian Hunter --- fs/ubifs/super.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index b1c57e8ee855..cf078b5cc88c 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -406,6 +406,11 @@ static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt) else if (c->mount_opts.bulk_read == 1) seq_printf(s, ",no_bulk_read"); + if (c->mount_opts.chk_data_crc == 2) + seq_printf(s, ",chk_data_crc"); + else if (c->mount_opts.chk_data_crc == 1) + seq_printf(s, ",no_chk_data_crc"); + return 0; } @@ -859,6 +864,8 @@ static int check_volume_empty(struct ubifs_info *c) * Opt_norm_unmount: run a journal commit before un-mounting * Opt_bulk_read: enable bulk-reads * Opt_no_bulk_read: disable bulk-reads + * Opt_chk_data_crc: check CRCs when reading data nodes + * Opt_no_chk_data_crc: do not check CRCs when reading data nodes * Opt_err: just end of array marker */ enum { @@ -866,6 +873,8 @@ enum { Opt_norm_unmount, Opt_bulk_read, Opt_no_bulk_read, + Opt_chk_data_crc, + Opt_no_chk_data_crc, Opt_err, }; @@ -874,6 +883,8 @@ static match_table_t tokens = { {Opt_norm_unmount, "norm_unmount"}, {Opt_bulk_read, "bulk_read"}, {Opt_no_bulk_read, "no_bulk_read"}, + {Opt_chk_data_crc, "chk_data_crc"}, + {Opt_no_chk_data_crc, "no_chk_data_crc"}, {Opt_err, NULL}, }; @@ -919,6 +930,14 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options, c->mount_opts.bulk_read = 1; c->bulk_read = 0; break; + case Opt_chk_data_crc: + c->mount_opts.chk_data_crc = 2; + c->no_chk_data_crc = 0; + break; + case Opt_no_chk_data_crc: + c->mount_opts.chk_data_crc = 1; + c->no_chk_data_crc = 1; + break; default: ubifs_err("unrecognized mount option \"%s\" " "or missing value", p); @@ -1027,6 +1046,8 @@ static int mount_ubifs(struct ubifs_info *c) goto out_free; } + c->always_chk_crc = 1; + err = ubifs_read_superblock(c); if (err) goto out_free; @@ -1168,6 +1189,8 @@ static int mount_ubifs(struct ubifs_info *c) if (err) goto out_infos; + c->always_chk_crc = 0; + ubifs_msg("mounted UBI device %d, volume %d, name \"%s\"", c->vi.ubi_num, c->vi.vol_id, c->vi.name); if (mounted_read_only) @@ -1313,6 +1336,7 @@ static int ubifs_remount_rw(struct ubifs_info *c) mutex_lock(&c->umount_mutex); c->remounting_rw = 1; + c->always_chk_crc = 1; /* Check for enough free space */ if (ubifs_calc_available(c, c->min_idx_lebs) <= 0) { @@ -1381,13 +1405,15 @@ static int ubifs_remount_rw(struct ubifs_info *c) c->bgt = NULL; ubifs_err("cannot spawn \"%s\", error %d", c->bgt_name, err); - return err; + goto out; } wake_up_process(c->bgt); c->orph_buf = vmalloc(c->leb_size); - if (!c->orph_buf) - return -ENOMEM; + if (!c->orph_buf) { + err = -ENOMEM; + goto out; + } /* Check for enough log space */ lnum = c->lhead_lnum + 1; @@ -1414,6 +1440,7 @@ static int ubifs_remount_rw(struct ubifs_info *c) dbg_gen("re-mounted read-write"); c->vfs_sb->s_flags &= ~MS_RDONLY; c->remounting_rw = 0; + c->always_chk_crc = 0; mutex_unlock(&c->umount_mutex); return 0; @@ -1429,6 +1456,7 @@ 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; } -- cgit v1.2.3 From af2eb5637b88f7b8edf295ad3880706c5c30c324 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 9 Sep 2008 12:23:50 +0300 Subject: UBIFS: correct comment for commit_on_unmount Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index cf078b5cc88c..dae1c62156c6 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1465,12 +1465,9 @@ out: * commit_on_unmount - commit the journal when un-mounting. * @c: UBIFS file-system description object * - * This function is called during un-mounting and it commits the journal unless - * the "fast unmount" mode is enabled. It also avoids committing the journal if - * it contains too few data. - * - * Sometimes recovery requires the journal to be committed at least once, and - * this function takes care about this. + * This function is called during un-mounting and re-mounting, and it commits + * the journal unless the "fast unmount" mode is enabled. It also avoids + * committing the journal if it contains too few data. */ static void commit_on_unmount(struct ubifs_info *c) { -- cgit v1.2.3 From 403e12ab30ab160e1015bd998f0abc1865c574e0 Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 9 Sep 2008 12:31:37 +0300 Subject: UBIFS: commit on sync_fs Commit the journal when the FS is sync'ed. This will make statfs provide better free space report. And we anyway advice our users to sync the FS if they want better statfs report. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index dae1c62156c6..7e1f3efdf632 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -418,6 +418,7 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) { struct ubifs_info *c = sb->s_fs_info; int i, ret = 0, err; + long long bud_bytes; if (c->jheads) for (i = 0; i < c->jhead_cnt; i++) { @@ -425,6 +426,17 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) if (err && !ret) ret = err; } + + /* Commit the journal unless it has too few data */ + spin_lock(&c->buds_lock); + bud_bytes = c->bud_bytes; + spin_unlock(&c->buds_lock); + if (bud_bytes > c->leb_size) { + err = ubifs_run_commit(c); + if (err) + return err; + } + /* * We ought to call sync for c->ubi but it does not have one. If it had * it would in turn call mtd->sync, however mtd operations are -- cgit v1.2.3 From bed79935de9a658678f44b88a097367d3b26429f Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 11 Sep 2008 14:25:44 +0300 Subject: UBIFS: allow for sync_fs when read-only sync_fs can be called even if the file system is mounted read-only. Ensure the commit is not run in that case. Reported-by: Zoltan Sogor Signed-off-by: Adrian Hunter --- fs/ubifs/super.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 7e1f3efdf632..7fd759dde796 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -420,21 +420,22 @@ static int ubifs_sync_fs(struct super_block *sb, int wait) int i, ret = 0, err; long long bud_bytes; - if (c->jheads) + if (c->jheads) { for (i = 0; i < c->jhead_cnt; i++) { err = ubifs_wbuf_sync(&c->jheads[i].wbuf); if (err && !ret) ret = err; } - /* Commit the journal unless it has too few data */ - spin_lock(&c->buds_lock); - bud_bytes = c->bud_bytes; - spin_unlock(&c->buds_lock); - if (bud_bytes > c->leb_size) { - err = ubifs_run_commit(c); - if (err) - return err; + /* Commit the journal unless it has too little data */ + spin_lock(&c->buds_lock); + bud_bytes = c->bud_bytes; + spin_unlock(&c->buds_lock); + if (bud_bytes > c->leb_size) { + err = ubifs_run_commit(c); + if (err) + return err; + } } /* -- cgit v1.2.3 From fae7fb299f382355145c6cb4eec6aa84f4cd1fca Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Fri, 17 Oct 2008 18:49:23 +0300 Subject: UBIFS: amend printk It is better to print "Reserved for root" than "Reserved pool size", because it is more obvious for users what this means. Signed-off-by: Artem Bityutskiy --- fs/ubifs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs/ubifs/super.c') diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 7fd759dde796..046bf0879235 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1217,7 +1217,7 @@ static int mount_ubifs(struct ubifs_info *c) ubifs_msg("media format: %d (latest is %d)", c->fmt_version, UBIFS_FORMAT_VERSION); ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr)); - ubifs_msg("reserved pool size: %llu bytes (%llu KiB)", + ubifs_msg("reserved for root: %llu bytes (%llu KiB)", c->report_rp_size, c->report_rp_size >> 10); dbg_msg("compiled on: " __DATE__ " at " __TIME__); -- cgit v1.2.3