LU-12186 ec: add necessary structure member for EC file

[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 98507e0..eaadaca 100644 (file)
--- a/lustre/include/uapi/linux/lustre/lustre_user.h
+++ b/lustre/include/uapi/linux/lustre/lustre_user.h
@@ -858,6 +858,7 @@ enum lov_comp_md_entry_flags {
        LCME_FL_INIT      = 0x00000010, /* instantiated */
        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_NEG       = 0x80000000  /* used to indicate a negative flag,
                                         * won't be stored on disk
                                         */
@@ -906,13 +907,23 @@ enum lcme_id {
 struct lov_comp_md_entry_v1 {
        __u32                   lcme_id;        /* unique id of component */
        __u32                   lcme_flags;     /* LCME_FL_XXX */
-       struct lu_extent        lcme_extent;    /* file extent for component */
+       /* file extent for component. If it's an EC code component, its flags
+        * contains LCME_FL_PARITY, and its extent covers the same extent of
+        * its corresponding data component.
+        */
+       struct lu_extent        lcme_extent;
        __u32                   lcme_offset;    /* offset of component blob,
                                                   start from lov_comp_md_v1 */
        __u32                   lcme_size;      /* size of component blob */
        __u32                   lcme_layout_gen;
        __u64                   lcme_timestamp; /* snapshot time if applicable*/
-       __u32                   lcme_padding_1;
+       __u8                    lcme_dstripe_count;     /* data stripe count,
+                                                        * k value in EC
+                                                        */
+       __u8                    lcme_cstripe_count;     /* code stripe count,
+                                                        * p value in EC
+                                                        */
+       __u16                   lcme_padding_1;
 } __attribute__((packed));
 
 #define SEQ_ID_MAX             0x0000FFFF
@@ -954,7 +965,10 @@ struct lov_comp_md_v1 {
        /* lcm_mirror_count stores the number of actual mirrors minus 1,
         * so that non-flr files will have value 0 meaning 1 mirror. */
        __u16   lcm_mirror_count;
-       __u16   lcm_padding1[3];
+       /* code components count, non-EC file contains 0 ec_count */
+       __u8    lcm_ec_count;
+       __u8    lcm_padding3[1];
+       __u16   lcm_padding1[2];
        __u64   lcm_padding2;
        struct lov_comp_md_entry_v1 lcm_entries[0];
 } __attribute__((packed));