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path: root/fs/ubifs/super.c
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Diffstat (limited to 'fs/ubifs/super.c')
-rw-r--r--fs/ubifs/super.c109
1 files changed, 88 insertions, 21 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 9a9220333b3..8780efbf40a 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -401,6 +401,16 @@ 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");
+
+ 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;
}
@@ -408,13 +418,26 @@ 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)
+ 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 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;
+ }
+ }
+
/*
* 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
@@ -538,6 +561,18 @@ 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 +875,29 @@ 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_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 {
Opt_fast_unmount,
Opt_norm_unmount,
+ Opt_bulk_read,
+ Opt_no_bulk_read,
+ Opt_chk_data_crc,
+ Opt_no_chk_data_crc,
Opt_err,
};
static const 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_chk_data_crc, "chk_data_crc"},
+ {Opt_no_chk_data_crc, "no_chk_data_crc"},
{Opt_err, NULL},
};
@@ -888,6 +935,22 @@ 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;
+ 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);
@@ -996,6 +1059,8 @@ 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;
@@ -1032,8 +1097,6 @@ 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;
@@ -1139,24 +1202,28 @@ 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)
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 for root: %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"
@@ -1282,6 +1349,7 @@ 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) {
@@ -1345,20 +1413,20 @@ 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;
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;
@@ -1385,6 +1453,7 @@ 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;
@@ -1400,6 +1469,7 @@ 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;
}
@@ -1408,12 +1478,9 @@ 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)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 23:34:27 +0000