e2fsprogs: reserving code points for new ext4 quota feature

This patch adds support for detecting the new 'quota' feature in ext4.
The patch reserves code points for usr and group quota inodes and also
for the feature flag EXT4_FEATURE_RO_COMPAT_QUOTA.

Signed-off-by: Aditya Kali <adityakali@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/debugfs/set_fields.c b/debugfs/set_fields.c
index db1a99b..3b40117 100644 (file)
--- a/debugfs/set_fields.c
+++ b/debugfs/set_fields.c
@@ -140,6 +140,8 @@ static struct field_set_info super_fields[] = {
          parse_uint },
        { "snapshot_list", &set_sb.s_snapshot_list, 4, parse_uint },
        { "mount_opts",  &set_sb.s_mount_opts, 64, parse_string },
+       { "usr_quota_inum", &set_sb.s_usr_quota_inum, 4, parse_uint },
+       { "grp_quota_inum", &set_sb.s_grp_quota_inum, 4, parse_uint },
        { 0, 0, 0, 0 }
 };
 

diff --git a/e2fsck/message.c b/e2fsck/message.c
index 9aaedc5..74ab155 100644 (file)
--- a/e2fsck/message.c
+++ b/e2fsck/message.c
@@ -151,8 +151,8 @@ static const char *special_inode_name[] =
        N_("<The NULL inode>"),                 /* 0 */
        N_("<The bad blocks inode>"),           /* 1 */
        "/",                                    /* 2 */
-       N_("<The ACL index inode>"),            /* 3 */
-       N_("<The ACL data inode>"),             /* 4 */
+       N_("<The user quota inode>"),           /* 3 */
+       N_("<The group quota inode>"),          /* 4 */
        N_("<The boot loader inode>"),          /* 5 */
        N_("<The undelete directory inode>"),   /* 6 */
        N_("<The group descriptor inode>"),     /* 7 */

diff --git a/ext2ed/inode_com.c b/ext2ed/inode_com.c
index 843286c..8d4b9f3 100644 (file)
--- a/ext2ed/inode_com.c
+++ b/ext2ed/inode_com.c
@@ -222,11 +222,11 @@ void type_ext2_inode___show (char *command_line)
                        case EXT2_ROOT_INO:
                                wprintw (show_win,"Root inode - ");
                                break;
-                       case EXT2_ACL_IDX_INO:
-                               wprintw (show_win,"ACL index inode - ");
+                       case EXT4_USR_QUOTA_INO:
+                               wprintw (show_win,"User quota inode - ");
                                break;
-                       case EXT2_ACL_DATA_INO:
-                               wprintw (show_win,"ACL data inode - ");
+                       case EXT4_GRP_QUOTA_INO:
+                               wprintw (show_win,"Group quota inode - ");
                                break;
                        case EXT2_BOOT_LOADER_INO:
                                wprintw (show_win,"Boot loader inode - ");

diff --git a/lib/blkid/probe.h b/lib/blkid/probe.h
index 37fc9c0..37e80ef 100644 (file)
--- a/lib/blkid/probe.h
+++ b/lib/blkid/probe.h
@@ -109,6 +109,7 @@ struct ext2_super_block {
 #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM                0x0010
 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK       0x0020
 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE     0x0040
+#define EXT4_FEATURE_RO_COMPAT_QUOTA           0x0100
 
 /* for s_feature_incompat */
 #define EXT2_FEATURE_INCOMPAT_FILETYPE         0x0002

diff --git a/lib/e2p/feature.c b/lib/e2p/feature.c
index c7f8a35..9324199 100644 (file)
--- a/lib/e2p/feature.c
+++ b/lib/e2p/feature.c
@@ -55,6 +55,8 @@ static struct feature feature_list[] = {
                        "dir_nlink" },
        {       E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE,
                        "extra_isize" },
+       {       E2P_FEATURE_RO_INCOMPAT, EXT4_FEATURE_RO_COMPAT_QUOTA,
+                       "quota" },
 
        {       E2P_FEATURE_INCOMPAT, EXT2_FEATURE_INCOMPAT_COMPRESSION,
                        "compression" },

diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
index 5ef8098..8b8360a 100644 (file)
--- a/lib/e2p/ls.c
+++ b/lib/e2p/ls.c
@@ -374,6 +374,12 @@ void list_super2(struct ext2_super_block * sb, FILE *f)
                fprintf(f, "Last error block #:       %llu\n",
                        sb->s_last_error_block);
        }
+       if (sb->s_usr_quota_inum)
+               fprintf(f, "User quota inode:         %u\n",
+                       sb->s_usr_quota_inum);
+       if (sb->s_grp_quota_inum)
+               fprintf(f, "Group quota inode:        %u\n",
+                       sb->s_grp_quota_inum);
 }
 
 void list_super (struct ext2_super_block * s)

diff --git a/lib/ext2fs/ext2_fs.h b/lib/ext2fs/ext2_fs.h
index afd33a9..f396a10 100644 (file)
--- a/lib/ext2fs/ext2_fs.h
+++ b/lib/ext2fs/ext2_fs.h
@@ -44,8 +44,8 @@
  */
 #define EXT2_BAD_INO            1      /* Bad blocks inode */
 #define EXT2_ROOT_INO           2      /* Root inode */
-#define EXT2_ACL_IDX_INO        3      /* ACL inode */
-#define EXT2_ACL_DATA_INO       4      /* ACL inode */
+#define EXT4_USR_QUOTA_INO      3      /* User quota inode */
+#define EXT4_GRP_QUOTA_INO      4      /* Group quota inode */
 #define EXT2_BOOT_LOADER_INO    5      /* Boot loader inode */
 #define EXT2_UNDEL_DIR_INO      6      /* Undelete directory inode */
 #define EXT2_RESIZE_INO                 7      /* Reserved group descriptors inode */
@@ -614,7 +614,9 @@ struct ext2_super_block {
        __u8    s_last_error_func[32];  /* function where the error happened */
 #define EXT4_S_ERR_END ext4_offsetof(struct ext2_super_block, s_mount_opts)
        __u8    s_mount_opts[64];
-       __u32   s_reserved[112];        /* Padding to the end of the block */
+       __u32   s_usr_quota_inum;       /* inode number of user quota file */
+       __u32   s_grp_quota_inum;       /* inode number of group quota file */
+       __u32   s_reserved[110];        /* Padding to the end of the block */
 };
 
 #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
@@ -672,6 +674,7 @@ struct ext2_super_block {
 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK       0x0020
 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE     0x0040
 #define EXT4_FEATURE_RO_COMPAT_HAS_SNAPSHOT    0x0080
+#define EXT4_FEATURE_RO_COMPAT_QUOTA           0x0100
 
 #define EXT2_FEATURE_INCOMPAT_COMPRESSION      0x0001
 #define EXT2_FEATURE_INCOMPAT_FILETYPE         0x0002

diff --git a/lib/ext2fs/swapfs.c b/lib/ext2fs/swapfs.c
index 12427e0..15ff6fc 100644 (file)
--- a/lib/ext2fs/swapfs.c
+++ b/lib/ext2fs/swapfs.c
@@ -76,6 +76,8 @@ void ext2fs_swap_super(struct ext2_super_block * sb)
        sb->s_snapshot_r_blocks_count =
                ext2fs_swab64(sb->s_snapshot_r_blocks_count);
        sb->s_snapshot_list = ext2fs_swab32(sb->s_snapshot_list);
+       sb->s_usr_quota_inum = ext2fs_swab32(sb->s_usr_quota_inum);
+       sb->s_grp_quota_inum = ext2fs_swab32(sb->s_grp_quota_inum);
 
        for (i=0; i < 4; i++)
                sb->s_hash_seed[i] = ext2fs_swab32(sb->s_hash_seed[i]);

diff --git a/lib/ext2fs/tst_super_size.c b/lib/ext2fs/tst_super_size.c
index eb9114f..a3a5b44 100644 (file)
--- a/lib/ext2fs/tst_super_size.c
+++ b/lib/ext2fs/tst_super_size.c
@@ -123,6 +123,8 @@ void check_superblock_fields()
        check_field(s_last_error_block);
        check_field(s_last_error_func);
        check_field(s_mount_opts);
+       check_field(s_usr_quota_inum);
+       check_field(s_grp_quota_inum);
        check_field(s_reserved);
        printf("Ending offset is %d\n\n", cur_offset);
 #endif