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-rw-r--r--fs/ubifs/super.c31
1 files changed, 31 insertions, 0 deletions
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);