[PATCH v3 39/39] ubifs: introduce quota related mount options

[Dongsheng Yang <yangds.fnst@xxxxxxxxxxxxxx>]

This commit introduce mount options of quota, noquota,
usrquota and grpquota. These options are used to make
ubifs support quota.

Signed-off-by: Dongsheng Yang <yangds.fnst@xxxxxxxxxxxxxx>
---
 fs/ubifs/super.c | 30 ++++++++++++++++++++++++++++++
 fs/ubifs/ubifs.h |  4 ++++
 2 files changed, 34 insertions(+)

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index da16c65..e7e68ee 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -36,6 +36,7 @@
 #include <linux/mount.h>
 #include <linux/math64.h>
 #include <linux/writeback.h>
+#include <linux/quotaops.h>
 #include <linux/cdev.h>
 #include <linux/quotaops.h>
 #include "ubifs.h"
@@ -443,6 +444,12 @@ static int ubifs_show_options(struct seq_file *s, struct dentry *root)
 	else if (c->mount_opts.chk_data_crc == 1)
 		seq_puts(s, ",no_chk_data_crc");
 
+	if (c->usrquota)
+		seq_puts(s, ",usrquota");
+
+	if (c->grpquota)
+		seq_puts(s, ",grpquota");
+
 	if (c->mount_opts.override_compr) {
 		seq_printf(s, ",compr=%s",
 			   ubifs_compr_name(c->mount_opts.compr_type));
@@ -1112,6 +1119,10 @@ enum {
 	Opt_chk_data_crc,
 	Opt_no_chk_data_crc,
 	Opt_override_compr,
+	Opt_ignore,
+	Opt_quota,
+	Opt_usrquota,
+	Opt_grpquota,
 	Opt_err,
 };
 
@@ -1123,6 +1134,10 @@ static const match_table_t tokens = {
 	{Opt_chk_data_crc, "chk_data_crc"},
 	{Opt_no_chk_data_crc, "no_chk_data_crc"},
 	{Opt_override_compr, "compr=%s"},
+	{Opt_ignore, "noquota"},
+	{Opt_quota, "quota"},
+	{Opt_usrquota, "usrquota"},
+	{Opt_grpquota, "grpquota"},
 	{Opt_err, NULL},
 };
 
@@ -1223,6 +1238,21 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
 			c->default_compr = c->mount_opts.compr_type;
 			break;
 		}
+#ifdef CONFIG_QUOTA
+		case Opt_quota:
+		case Opt_usrquota:
+			c->usrquota = 1;
+			break;
+		case Opt_grpquota:
+			c->grpquota = 1;
+			break;
+#else
+		case Opt_quota:
+		case Opt_usrquota:
+		case Opt_grpquota:
+			ubifs_err(c, "quota operations not supported");
+			break;
+#endif
 		default:
 		{
 			unsigned long flag;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 21b5dc0..ef06af7 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1044,6 +1044,8 @@ struct ubifs_debug_info;
  * @bulk_read: enable bulk-reads
  * @default_compr: default compression algorithm (%UBIFS_COMPR_LZO, etc)
  * @rw_incompat: the media is not R/W compatible
+ * @usrquota: enable usrquota
+ * @grpquota: enable grpquota
  *
  * @tnc_mutex: protects the Tree Node Cache (TNC), @zroot, @cnext, @enext, and
  *             @calc_idx_sz
@@ -1285,6 +1287,8 @@ struct ubifs_info {
 	unsigned int bulk_read:1;
 	unsigned int default_compr:2;
 	unsigned int rw_incompat:1;
+	unsigned int usrquota:1;
+	unsigned int grpquota:1;
 
 	struct mutex tnc_mutex;
 	struct ubifs_zbranch zroot;
-- 
1.8.4.2

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