LU-10026 csdc: reserve layout bits for compress component

[fs/lustre-release.git] / lustre / include / uapi / linux / lustre / lustre_user.h

diff --git a/lustre/include/uapi/linux/lustre/lustre_user.h b/lustre/include/uapi/linux/lustre/lustre_user.h
index dc1af4e..70949e8 100644 (file)
--- a/lustre/include/uapi/linux/lustre/lustre_user.h
+++ b/lustre/include/uapi/linux/lustre/lustre_user.h
@@ -724,6 +724,7 @@ struct fsxattr {
 #define LOV_PATTERN_MDT                        0x100
 #define LOV_PATTERN_OVERSTRIPING       0x200
 #define LOV_PATTERN_FOREIGN            0x400
+#define LOV_PATTERN_COMPRESS           0x800
 
 #define LOV_PATTERN_F_MASK     0xffff0000
 #define LOV_PATTERN_F_HOLE     0x40000000 /* there is hole in LOV EA */
@@ -893,6 +894,13 @@ enum lov_comp_md_entry_flags {
        LCME_FL_NOSYNC    = 0x00000020, /* FLR: no sync for the mirror */
        LCME_FL_EXTENSION = 0x00000040, /* extension comp, never init */
        LCME_FL_PARITY    = 0x00000080, /* EC: a parity code component */
+       LCME_FL_COMPRESS  = 0x00000100, /* the component should be compressed */
+       LCME_FL_PARTIAL   = 0x00000200, /* some chunks in the component are
+                                        * uncompressed
+                                        */
+       LCME_FL_NOCOMPR   = 0x00000400, /* the component should not be
+                                        * compressed
+                                        */
        LCME_FL_NEG       = 0x80000000  /* used to indicate a negative flag,
                                         * won't be stored on disk
                                         */
@@ -963,7 +971,11 @@ struct lov_comp_md_entry_v1 {
        __u8                    lcme_cstripe_count;     /* code stripe count,
                                                         * p value in EC
                                                         */
-       __u16                   lcme_padding_1;
+       __u8                    lcme_compr_type;        /* compress type */
+       __u8                    lcme_compr_lvl:4;       /* compress level */
+       __u8                    lcme_compr_chunk_log_bits:4;
+                                    /* chunk_size = 2^(16+chunk_log_bits)
+                                     * i.e. power-of-two multiple of 64KiB */
 } __attribute__((packed));
 
 #define SEQ_ID_MAX             0x0000FFFF