[Devel] [PATCH rh7 7/7] ext4: reserve code points for the project quota feature

[Stanislav Kinsburskiy]

Signed-off-by: Theodore Ts'o <ty...@mit.edu>
Signed-off-by: Stanislav Kinsburskiy <skinsbur...@virtuozzo.com>
---
 fs/ext4/ext4.h          |    8 +++++++-
 include/uapi/linux/fs.h |    1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9bbcb37..bde4ee7 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -396,6 +396,7 @@ struct flex_groups {
 #define EXT4_EA_INODE_FL               0x00200000 /* Inode used for large EA */
 #define EXT4_EOFBLOCKS_FL              0x00400000 /* Blocks allocated beyond 
EOF */
 #define EXT4_INLINE_DATA_FL            0x10000000 /* Inode has inline data. */
+#define EXT4_PROJINHERIT_FL            0x20000000 /* Create with parents 
projid */
 #define EXT4_RESERVED_FL               0x80000000 /* reserved for ext4 lib */
 
 #define EXT4_FL_USER_VISIBLE           0x004BDFFF /* User visible flags */
@@ -453,6 +454,7 @@ enum {
        EXT4_INODE_EA_INODE     = 21,   /* Inode used for large EA */
        EXT4_INODE_EOFBLOCKS    = 22,   /* Blocks allocated beyond EOF */
        EXT4_INODE_INLINE_DATA  = 28,   /* Data in inode. */
+       EXT4_INODE_PROJINHERIT  = 29,   /* Create with parents projid */
        EXT4_INODE_RESERVED     = 31,   /* reserved for ext4 lib */
 };
 
@@ -497,6 +499,7 @@ static inline void ext4_check_flag_values(void)
        CHECK_FLAG_VALUE(EA_INODE);
        CHECK_FLAG_VALUE(EOFBLOCKS);
        CHECK_FLAG_VALUE(INLINE_DATA);
+       CHECK_FLAG_VALUE(PROJINHERIT);
        CHECK_FLAG_VALUE(RESERVED);
 }
 
@@ -712,6 +715,7 @@ struct ext4_inode {
        __le32  i_crtime;       /* File Creation time */
        __le32  i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
        __le32  i_version_hi;   /* high 32 bits for 64-bit version */
+       __le32  i_projid;       /* Project ID */
 };
 
 struct move_extent {
@@ -1190,7 +1194,8 @@ struct ext4_super_block {
        __le32  s_grp_quota_inum;       /* inode for tracking group quota */
        __le32  s_overhead_clusters;    /* overhead blocks/clusters in fs */
        __le32  s_backup_bgs[2];        /* groups with sparse_super2 SBs */
-       __le32  s_reserved[106];        /* Padding to the end of the block */
+       __le32  s_prj_quota_inum;       /* inode for tracking project quota */
+       __le32  s_reserved[105];        /* Padding to the end of the block */
        __le32  s_checksum;             /* crc32c(superblock) */
 };
 
@@ -1573,6 +1578,7 @@ static inline void ext4_clear_state_flags(struct 
ext4_inode_info *ei)
  * GDT_CSUM bits are mutually exclusive.
  */
 #define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM   0x0400
+#define EXT4_FEATURE_RO_COMPAT_PROJECT         0x2000
 
 #define EXT4_FEATURE_INCOMPAT_COMPRESSION      0x0001
 #define EXT4_FEATURE_INCOMPAT_FILETYPE         0x0002
diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h
index 359bf02..a195a15 100644
--- a/include/uapi/linux/fs.h
+++ b/include/uapi/linux/fs.h
@@ -231,6 +231,7 @@ enum CI_FLAGS
 #define FS_EXTENT_FL                   0x00080000 /* Extents */
 #define FS_DIRECTIO_FL                 0x00100000 /* Use direct i/o */
 #define FS_NOCOW_FL                    0x00800000 /* Do not cow file */
+#define FS_PROJINHERIT_FL              0x20000000 /* Create with parents 
projid */
 #define FS_RESERVED_FL                 0x80000000 /* reserved for ext2 lib */
 
 #define FS_FL_USER_VISIBLE             0x0003DFFF /* User visible flags */

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