diff --git a/debugfs/set_fields.c b/debugfs/set_fields.c
index 57ef871..c027d8e 100644
--- a/debugfs/set_fields.c
+++ b/debugfs/set_fields.c
@@ -153,6 +153,7 @@ static struct field_set_info super_fields[] = {
 	{ "mount_opts",  &set_sb.s_mount_opts, NULL, 64, parse_string },
 	{ "usr_quota_inum", &set_sb.s_usr_quota_inum, NULL, 4, parse_uint },
 	{ "grp_quota_inum", &set_sb.s_grp_quota_inum, NULL, 4, parse_uint },
+	{ "prj_quota_inum", &set_sb.s_prj_quota_inum, NULL, 4, parse_uint },
 	{ "overhead_blocks", &set_sb.s_overhead_blocks, NULL, 4, parse_uint },
 	{ "backup_bgs", &set_sb.s_backup_bgs[0], NULL, 4, parse_uint,
 	  FLAG_ARRAY, 2 },
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index 23d15bd..eb3d19d 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -965,13 +965,20 @@ static int quota_inum_is_super(struct ext2_super_block *sb, ext2_ino_t ino)
 	return 0;
 }
 
-static int quota_inum_is_reserved(ext2_ino_t ino)
+static int quota_inum_is_reserved(ext2_filsys fs, ext2_ino_t ino)
 {
 	enum quota_type qtype;
 
-	for (qtype = 0; qtype < MAXQUOTAS; qtype++)
-		if (quota_type2inum(qtype) == ino)
-			return 1;
+	for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+		if (quota_type2inum(qtype) == ino) {
+			if (qtype != PRJQUOTA)
+				return 1;
+			else if (quota_inum_is_super(fs->super, ino))
+				return 1;
+			else
+				return 0;
+		}
+	}
 
 	return 0;
 }
@@ -1526,7 +1533,7 @@ void e2fsck_pass1(e2fsck_t ctx)
 							inode_size, "pass1");
 				failed_csum = 0;
 			}
-		} else if (quota_inum_is_reserved(ino)) {
+		} else if (quota_inum_is_reserved(fs, ino)) {
 			ext2fs_mark_inode_bitmap2(ctx->inode_used_map, ino);
 			if ((fs->super->s_feature_ro_compat &
 					EXT4_FEATURE_RO_COMPAT_QUOTA) &&
diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
index 4e80372..d9594cd 100644
--- a/lib/e2p/ls.c
+++ b/lib/e2p/ls.c
@@ -210,6 +210,7 @@ static const char *checksum_type(__u8 type)
 static const char const *quota_prefix[MAXQUOTAS] = {
         [USRQUOTA] = "User quota inode:",
         [GRPQUOTA] = "Group quota inode:",
+        [PRJQUOTA] = "Project quota inode:",
 };
 
 /**
diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index cfeaa05..a5f4124 100644
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -52,6 +52,7 @@
 #define EXT2_JOURNAL_INO	 8	/* Journal inode */
 #define EXT2_EXCLUDE_INO	 9	/* The "exclude" inode, for snapshots */
 #define EXT4_REPLICA_INO	10	/* Used by non-upstream feature */
+#define EXT4_PRJ_QUOTA_INO	11	/* Project quota inode */
 
 /* First non-reserved inode for old ext2 filesystems */
 #define EXT2_GOOD_OLD_FIRST_INO	11
@@ -473,6 +474,7 @@ struct ext2_inode_large {
 	__u32	i_crtime;	/* File creation time */
 	__u32	i_crtime_extra;	/* extra File creation time (nsec << 2 | epoch)*/
 	__u32	i_version_hi;	/* high 32 bits for 64-bit version */
+	__u32   i_projid;       /* Project ID */
 };
 
 #define EXT4_INODE_CSUM_HI_EXTRA_END	\
@@ -506,6 +508,7 @@ struct ext2_inode_large {
 
 #define inode_uid(inode)	((inode).i_uid | (inode).osd2.linux2.l_i_uid_high << 16)
 #define inode_gid(inode)	((inode).i_gid | (inode).osd2.linux2.l_i_gid_high << 16)
+#define inode_projid(large_inode) ((large_inode).i_projid)
 #define ext2fs_set_i_uid_high(inode,x) ((inode).osd2.linux2.l_i_uid_high = (x))
 #define ext2fs_set_i_gid_high(inode,x) ((inode).osd2.linux2.l_i_gid_high = (x))
 
@@ -719,7 +722,8 @@ struct ext2_super_block {
 	__u8	s_encrypt_algos[4];	/* Encryption algorithms in use  */
 	__u8	s_encrypt_pw_salt[16];	/* Salt used for string2key algorithm */
 	__le32	s_lpf_ino;		/* Location of the lost+found inode */
-	__le32	s_reserved[100];	/* Padding to the end of the block */
+	__u32   s_prj_quota_inum;	/* inode number of project quota file */
+	__le32	s_reserved[99];		/* Padding to the end of the block */
 	__u32	s_checksum;		/* crc32c(superblock) */
 };
 
diff --git a/lib/ext2fs/swapfs.c b/lib/ext2fs/swapfs.c
index ee7a455..bc50fd4 100644
--- a/lib/ext2fs/swapfs.c
+++ b/lib/ext2fs/swapfs.c
@@ -320,6 +320,8 @@ void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
 		t->i_crtime_extra = ext2fs_swab32(f->i_crtime_extra);
 	if (extra_isize >= 28)
 		t->i_version_hi = ext2fs_swab32(f->i_version_hi);
+	if (extra_isize >= 32)
+		t->i_projid = ext2fs_swab32(f->i_projid);
 
 	i = sizeof(struct ext2_inode) + extra_isize + sizeof(__u32);
 	if (bufsize < (int) i)
diff --git a/lib/ext2fs/tst_inode_size.c b/lib/ext2fs/tst_inode_size.c
index e20ec98..cc5d165 100644
--- a/lib/ext2fs/tst_inode_size.c
+++ b/lib/ext2fs/tst_inode_size.c
@@ -81,6 +81,7 @@ int main(int argc, char **argv)
 	check_field(i_crtime, 4);
 	check_field(i_crtime_extra, 4);
 	check_field(i_version_hi, 4);
+	check_field(i_projid, 4);
 	/* This size will change as new fields are added */
 	do_field("Large inode end", 0, 0, cur_offset, sizeof(inode));
 #endif
diff --git a/lib/ext2fs/tst_super_size.c b/lib/ext2fs/tst_super_size.c
index 8e3c21f..9b25cce 100644
--- a/lib/ext2fs/tst_super_size.c
+++ b/lib/ext2fs/tst_super_size.c
@@ -140,7 +140,8 @@ int main(int argc, char **argv)
 	check_field(s_encrypt_algos, 4);
 	check_field(s_encrypt_pw_salt, 16);
 	check_field(s_lpf_ino, 4);
-	check_field(s_reserved, 100 * 4);
+	check_field(s_prj_quota_inum, 4);
+	check_field(s_reserved, 99 * 4);
 	check_field(s_checksum, 4);
 	do_field("Superblock end", 0, 0, cur_offset, 1024);
 #endif
diff --git a/lib/support/mkquota.c b/lib/support/mkquota.c
index b74c885..442fd38 100644
--- a/lib/support/mkquota.c
+++ b/lib/support/mkquota.c
@@ -233,11 +233,16 @@ static int dict_uint_cmp(const void *a, const void *b)
 
 static inline qid_t get_qid(struct ext2_inode *inode, enum quota_type qtype)
 {
+	struct ext2_inode_large *large_inode;
+
 	switch (qtype) {
 		case USRQUOTA:
 			return inode_uid(*inode);
 		case GRPQUOTA:
 			return inode_gid(*inode);
+		case PRJQUOTA:
+			large_inode = (struct ext2_inode_large *) inode;
+			return inode_projid(*large_inode);
 		default:
 			return 0;
 	}
diff --git a/lib/support/quotaio.c b/lib/support/quotaio.c
index bd8123e..6f52409 100644
--- a/lib/support/quotaio.c
+++ b/lib/support/quotaio.c
@@ -20,7 +20,11 @@
 #include "common.h"
 #include "quotaio.h"
 
-static const char * const extensions[MAXQUOTAS] = {"user", "group"};
+static const char * const extensions[MAXQUOTAS] = {
+	[USRQUOTA] = "user",
+	[GRPQUOTA] = "group",
+	[PRJQUOTA] = "project",
+};
 static const char * const basenames[] = {
 	"",		/* undefined */
 	"quota",	/* QFMT_VFS_OLD */
@@ -56,6 +60,9 @@ ext2_ino_t quota_type2inum(enum quota_type qtype)
 	case GRPQUOTA:
 		return EXT4_GRP_QUOTA_INO;
 		break;
+	case PRJQUOTA:
+		return EXT4_PRJ_QUOTA_INO;
+		break;
 	default:
 		return 0;
 		break;
diff --git a/lib/support/quotaio.h b/lib/support/quotaio.h
index fc114e2..438d077 100644
--- a/lib/support/quotaio.h
+++ b/lib/support/quotaio.h
@@ -46,9 +46,10 @@ typedef int64_t qsize_t;	/* Type in which we store size limitations */
 enum quota_type {
 	USRQUOTA = 0,
 	GRPQUOTA = 1,
+	PRJQUOTA = 2,
 };
 
-#define MAXQUOTAS 2
+#define MAXQUOTAS 3
 
 #if MAXQUOTAS > 32
 #error "cannot have more than 32 quota types to fit in qtype_bits"
@@ -56,7 +57,8 @@ enum quota_type {
 
 #define QUOTA_USR_BIT (1 << USRQUOTA)
 #define QUOTA_GRP_BIT (1 << GRPQUOTA)
-#define QUOTA_ALL_BIT (QUOTA_USR_BIT | QUOTA_GRP_BIT)
+#define QUOTA_PRJ_BIT (1 << PRJQUOTA)
+#define QUOTA_ALL_BIT (QUOTA_USR_BIT | QUOTA_GRP_BIT | QUOTA_PRJ_BIT)
 
 typedef struct quota_ctx *quota_ctx_t;
 struct dict_t;
@@ -72,7 +74,8 @@ struct quota_ctx {
  */
 #define INITQMAGICS {\
 	0xd9c01f11,	/* USRQUOTA */\
-	0xd9c01927	/* GRPQUOTA */\
+	0xd9c01927,	/* GRPQUOTA */\
+	0xd9c03f14      /* PRJQUOTA */\
 }
 
 /* Size of blocks in which are counted size limits in generic utility parts */
@@ -240,6 +243,8 @@ static inline ext2_ino_t *quota_sb_inump(struct ext2_super_block *sb, enum quota
 			return &sb->s_usr_quota_inum;
 		case GRPQUOTA:
 			return &sb->s_grp_quota_inum;
+		case PRJQUOTA:
+			return &sb->s_prj_quota_inum;
 		default:
 			return NULL;
 	}
diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 5ead18e..97aa8c4 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1017,6 +1017,8 @@ static void parse_extended_opts(struct ext2_super_block *param,
 				quotatype_bits = QUOTA_USR_BIT;
 			} else if (!strncmp(arg, "grp", 3)) {
 				quotatype_bits = QUOTA_GRP_BIT;
+			} else if (!strncmp(arg, "prj", 3)) {
+				quotatype_bits = QUOTA_PRJ_BIT;
 			} else {
 				fprintf(stderr,
 					_("Invalid quotatype parameter: %s\n"),
@@ -2961,6 +2963,10 @@ int main (int argc, char *argv[])
 		exit(ext2fs_close_free(&fs) ? 1 : 0);
 	}
 
+	if (EXT2_HAS_RO_COMPAT_FEATURE(&fs_param,
+				       EXT4_FEATURE_RO_COMPAT_QUOTA))
+		fs->super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO + 1;
+
 	if (bad_blocks_filename)
 		read_bb_file(fs, &bb_list, bad_blocks_filename);
 	if (cflag)
diff --git a/misc/tune2fs.c b/misc/tune2fs.c
index 1684225..94e962c 100644
--- a/misc/tune2fs.c
+++ b/misc/tune2fs.c
@@ -1500,6 +1500,10 @@ static void parse_quota_opts(const char *opts)
 			quota_enable[GRPQUOTA] = QOPT_ENABLE;
 		} else if (strcmp(token, "^grpquota") == 0) {
 			quota_enable[GRPQUOTA] = QOPT_DISABLE;
+		} else if (strcmp(token, "prjquota") == 0) {
+			quota_enable[PRJQUOTA] = QOPT_ENABLE;
+		} else if (strcmp(token, "^prjquota") == 0) {
+			quota_enable[PRJQUOTA] = QOPT_DISABLE;
 		} else {
 			fputs(_("\nBad quota options specified.\n\n"
 				"Following valid quota options are available "
diff --git a/tests/d_fallocate_blkmap/expect b/tests/d_fallocate_blkmap/expect
index f7ae606..a66b06a 100644
--- a/tests/d_fallocate_blkmap/expect
+++ b/tests/d_fallocate_blkmap/expect
@@ -21,7 +21,7 @@ User:     0   Group:     0   Size: 40960
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 82
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 BLOCKS:
 (0-1):1312-1313, (2-11):8000-8009, (IND):8010, (12-39):8011-8038
 TOTAL: 41
@@ -33,7 +33,7 @@ User:     0   Group:     0   Size: 10240000
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 20082
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 BLOCKS:
 (0-11):10000-10011, (IND):10012, (12-267):10013-10268, (DIND):10269, (IND):10270, (268-523):10271-10526, (IND):10527, (524-779):10528-10783, (IND):10784, (780-1035):10785-11040, (IND):11041, (1036-1291):11042-11297, (IND):11298, (1292-1547):11299-11554, (IND):11555, (1548-1803):11556-11811, (IND):11812, (1804-2059):11813-12068, (IND):12069, (2060-2315):12070-12325, (IND):12326, (2316-2571):12327-12582, (IND):12583, (2572-2827):12584-12839, (IND):12840, (2828-3083):12841-13096, (IND):13097, (3084-3339):13098-13353, (IND):13354, (3340-3595):13355-13610, (IND):13611, (3596-3851):13612-13867, (IND):13868, (3852-4107):13869-14124, (IND):14125, (4108-4363):14126-14381, (IND):14382, (4364-4619):14383-14638, (IND):14639, (4620-4875):14640-14895, (IND):14896, (4876-5131):14897-15152, (IND):15153, (5132-5387):15154-15409, (IND):15410, (5388-5643):15411-15666, (IND):15667, (5644-5899):15668-15923, (IND):15924, (5900-6155):15925-16180, (IND):16181, (6156-6411):16182-16437, (IND):16438, (6412-6667):16439-16694, (IND):16695, (6668-6923):16696-16951, (IND):16952, (6924-7179):16953-17208, (IND):17209, (7180-7435):17210-17465, (IND):17466, (7436-7691):17467-17722, (IND):17723, (7692-7947):17724-17979, (IND):17980, (7948-8203):17981-18236, (IND):18237, (8204-8459):18238-18493, (IND):18494, (8460-8715):18495-18750, (IND):18751, (8716-8971):18752-19007, (IND):19008, (8972-9227):19009-19264, (IND):19265, (9228-9483):19266-19521, (IND):19522, (9484-9739):19523-19778, (IND):19779, (9740-9995):19780-20035, (IND):20036, (9996-9999):20037-20040
 TOTAL: 10041
diff --git a/tests/f_create_symlinks/expect b/tests/f_create_symlinks/expect
index 47fa468..6e1553c 100644
--- a/tests/f_create_symlinks/expect
+++ b/tests/f_create_symlinks/expect
@@ -23,7 +23,7 @@ User:     0   Group:     0   Size: 31
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 0
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 Fast link dest: "/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
 debugfs -R "stat /l_70" test.img
 Inode: 13   Type: symlink    Mode:  0777   Flags: 0x10000000
@@ -32,7 +32,7 @@ User:     0   Group:     0   Size: 71
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 0
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 Extended attributes:
   system.data (11)
 Fast link dest: "/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
@@ -43,7 +43,7 @@ User:     0   Group:     0   Size: 501
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 2
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 EXTENTS:
 (0):153
 debugfs -R "stat /l_1023" test.img
@@ -53,7 +53,7 @@ User:     0   Group:     0   Size: 1024
 File ACL: 0    Directory ACL: 0
 Links: 1   Blockcount: 2
 Fragment:  Address: 0    Number: 0    Size: 0
-Size of extra inode fields: 28
+Size of extra inode fields: 32
 EXTENTS:
 (0):154
 debugfs -R "stat /l_1024" test.img
diff --git a/tests/m_bigjournal/expect.1 b/tests/m_bigjournal/expect.1
index 61d85f9..8900596 100644
--- a/tests/m_bigjournal/expect.1
+++ b/tests/m_bigjournal/expect.1
@@ -35,8 +35,8 @@ Reserved blocks uid:      0
 Reserved blocks gid:      0
 First inode:              11
 Inode size:	          256
-Required extra isize:     28
-Desired extra isize:      28
+Required extra isize:     32
+Desired extra isize:      32
 Journal inode:            8
 Default directory hash:   half_md4
 Journal backup:           inode blocks
diff --git a/tests/m_large_file/expect.1 b/tests/m_large_file/expect.1
index 4acca41..06c8257 100644
--- a/tests/m_large_file/expect.1
+++ b/tests/m_large_file/expect.1
@@ -40,8 +40,8 @@ Reserved blocks uid:      0
 Reserved blocks gid:      0
 First inode:              11
 Inode size:	          256
-Required extra isize:     28
-Desired extra isize:      28
+Required extra isize:     32
+Desired extra isize:      32
 Default directory hash:   half_md4
 
 
diff --git a/tests/m_quota/expect.1 b/tests/m_quota/expect.1
index 787871c..dc8eca9 100644
--- a/tests/m_quota/expect.1
+++ b/tests/m_quota/expect.1
@@ -12,7 +12,7 @@ Pass 2: Checking directory structure
 Pass 3: Checking directory connectivity
 Pass 4: Checking reference counts
 Pass 5: Checking group summary information
-test_filesys: 11/32768 files (18.2% non-contiguous), 5703/131072 blocks
+test_filesys: 12/32768 files (25.0% non-contiguous), 5709/131072 blocks
 Exit status is 0
 Filesystem volume name:   <none>
 Last mounted on:          <not available>
@@ -26,8 +26,8 @@ Filesystem OS type:       Linux
 Inode count:              32768
 Block count:              131072
 Reserved block count:     6553
-Free blocks:              125369
-Free inodes:              32757
+Free blocks:              125363
+Free inodes:              32756
 First block:              1
 Block size:               1024
 Fragment size:            1024
@@ -40,11 +40,12 @@ Mount count:              0
 Check interval:           15552000 (6 months)
 Reserved blocks uid:      0
 Reserved blocks gid:      0
-First inode:              11
+First inode:              12
 Inode size:	          128
 Default directory hash:   half_md4
 User quota inode:         3
 Group quota inode:        4
+Project quota inode:      11
 
 
 Group 0: (Blocks 1-8192)
@@ -52,9 +53,9 @@ Group 0: (Blocks 1-8192)
   Reserved GDT blocks at 3-258
   Block bitmap at 259 (+258), Inode bitmap at 260 (+259)
   Inode table at 261-516 (+260)
-  7650 free blocks, 2037 free inodes, 2 directories
-  Free blocks: 543-8192
-  Free inodes: 12-2048
+  7644 free blocks, 2036 free inodes, 2 directories
+  Free blocks: 549-8192
+  Free inodes: 13-2048
 Group 1: (Blocks 8193-16384)
   Backup superblock at 8193, Group descriptors at 8194-8194
   Reserved GDT blocks at 8195-8450
