LU-10193 osd-zfs: backup index object with plain format

[fs/lustre-release.git] / lustre / include / lustre_scrub.h

diff --git a/lustre/include/lustre_scrub.h b/lustre/include/lustre_scrub.h
index eb066f3..055b248 100644 (file)
--- a/lustre/include/lustre_scrub.h
+++ b/lustre/include/lustre_scrub.h
@@ -163,6 +163,7 @@ enum osd_lf_flags {
        OLF_SHOW_NAME           = 0x0004,
        OLF_NO_OI               = 0x0008,
        OLF_IDX_IN_FID          = 0x0010,
+       OLF_NOT_BACKUP          = 0x0020,
 };
 
 /* There are some overhead to detect OI inconsistency automatically
@@ -297,6 +298,42 @@ struct lustre_scrub {
                                os_full_scrub:1;
 };
 
+#define INDEX_BACKUP_MAGIC_V1  0x1E41F208
+#define INDEX_BACKUP_BUFSIZE   (4096 * 4)
+
+enum lustre_index_backup_policy {
+       /* By default, do not backup the index */
+       LIBP_NONE       = 0,
+
+       /* Backup the dirty index objects when umount */
+       LIBP_AUTO       = 1,
+};
+
+struct lustre_index_backup_header {
+       __u32           libh_magic;
+       __u32           libh_count;
+       __u32           libh_keysize;
+       __u32           libh_recsize;
+       struct lu_fid   libh_owner;
+       __u64           libh_pad[60]; /* keep header 512 bytes aligned */
+};
+
+struct lustre_index_backup_unit {
+       struct list_head        libu_link;
+       struct lu_fid           libu_fid;
+       __u32                   libu_keysize;
+       __u32                   libu_recsize;
+};
+
+struct lustre_index_restore_unit {
+       struct list_head        liru_link;
+       struct lu_fid           liru_pfid;
+       struct lu_fid           liru_cfid;
+       __u64                   liru_clid;
+       int                     liru_len;
+       char                    liru_name[0];
+};
+
 void scrub_file_init(struct lustre_scrub *scrub, __u8 *uuid);
 void scrub_file_reset(struct lustre_scrub *scrub, __u8 *uuid, __u64 flags);
 int scrub_file_load(const struct lu_env *env, struct lustre_scrub *scrub);
@@ -307,6 +344,30 @@ int scrub_start(int (*threadfn)(void *data), struct lustre_scrub *scrub,
 void scrub_stop(struct lustre_scrub *scrub);
 void scrub_dump(struct seq_file *m, struct lustre_scrub *scrub);
 
+int lustre_liru_new(struct list_head *head, const struct lu_fid *pfid,
+                   const struct lu_fid *cfid, __u64 child,
+                   const char *name, int namelen);
+
+int lustre_index_register(struct dt_device *dev, const char *devname,
+                         struct list_head *head, spinlock_t *lock, int *guard,
+                         const struct lu_fid *fid,
+                         __u32 keysize, __u32 recsize);
+
+void lustre_index_backup(const struct lu_env *env, struct dt_device *dev,
+                        const char *devname, struct list_head *head,
+                        spinlock_t *lock, int *guard, bool backup);
+int lustre_index_restore(const struct lu_env *env, struct dt_device *dev,
+                        const struct lu_fid *parent_fid,
+                        const struct lu_fid *tgt_fid,
+                        const struct lu_fid *bak_fid, const char *name,
+                        struct list_head *head, spinlock_t *lock,
+                        char *buf, int bufsize);
+
+static inline void lustre_fid2lbx(char *buf, const struct lu_fid *fid, int len)
+{
+       snprintf(buf, len, DFID_NOBRACE".lbx", PFID(fid));
+}
+
 static inline const char *osd_scrub2name(struct lustre_scrub *scrub)
 {
        return scrub->os_name;