LU-10092 llite: Add persistent cache on client

[fs/lustre-release.git] / lustre / llite / llite_lib.c

diff --git a/lustre/llite/llite_lib.c b/lustre/llite/llite_lib.c
index 91eb088..5853551 100644 (file)
--- a/lustre/llite/llite_lib.c
+++ b/lustre/llite/llite_lib.c
@@ -138,6 +138,7 @@ static struct ll_sb_info *ll_init_sbi(void)
        sbi->ll_squash.rsi_gid = 0;
        INIT_LIST_HEAD(&sbi->ll_squash.rsi_nosquash_nids);
        init_rwsem(&sbi->ll_squash.rsi_sem);
+       pcc_super_init(&sbi->ll_pcc_super);
 
        /* Per-filesystem file heat */
        sbi->ll_heat_decay_weight = SBI_DEFAULT_HEAT_DECAY_WEIGHT;
@@ -157,6 +158,7 @@ static void ll_free_sbi(struct super_block *sb)
                        cl_cache_decref(sbi->ll_cache);
                        sbi->ll_cache = NULL;
                }
+               pcc_super_fini(&sbi->ll_pcc_super);
                OBD_FREE(sbi, sizeof(*sbi));
        }
        EXIT;
@@ -228,7 +230,8 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
                                   OBD_CONNECT2_LOCK_CONVERT |
                                   OBD_CONNECT2_ARCHIVE_ID_ARRAY |
                                   OBD_CONNECT2_LSOM |
-                                  OBD_CONNECT2_ASYNC_DISCARD;
+                                  OBD_CONNECT2_ASYNC_DISCARD |
+                                  OBD_CONNECT2_PCC;
 
 #ifdef HAVE_LRU_RESIZE_SUPPORT
         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
@@ -980,6 +983,8 @@ void ll_lli_init(struct ll_inode_info *lli)
                spin_lock_init(&lli->lli_heat_lock);
                obd_heat_clear(lli->lli_heat_instances, OBD_HEAT_COUNT);
                lli->lli_heat_flags = 0;
+               mutex_init(&lli->lli_pcc_lock);
+               lli->lli_pcc_inode = NULL;
        }
        mutex_init(&lli->lli_layout_mutex);
        memset(lli->lli_jobid, 0, sizeof(lli->lli_jobid));
@@ -1512,17 +1517,20 @@ void ll_clear_inode(struct inode *inode)
 {
         struct ll_inode_info *lli = ll_i2info(inode);
         struct ll_sb_info *sbi = ll_i2sbi(inode);
+
         ENTRY;
 
        CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
               PFID(ll_inode2fid(inode)), inode);
 
-        if (S_ISDIR(inode->i_mode)) {
-                /* these should have been cleared in ll_file_release */
-                LASSERT(lli->lli_opendir_key == NULL);
-                LASSERT(lli->lli_sai == NULL);
-                LASSERT(lli->lli_opendir_pid == 0);
-        }
+       if (S_ISDIR(inode->i_mode)) {
+               /* these should have been cleared in ll_file_release */
+               LASSERT(lli->lli_opendir_key == NULL);
+               LASSERT(lli->lli_sai == NULL);
+               LASSERT(lli->lli_opendir_pid == 0);
+       } else {
+               pcc_inode_free(inode);
+       }
 
        md_null_inode(sbi->ll_md_exp, ll_inode2fid(inode));
 
@@ -1746,14 +1754,28 @@ int ll_setattr_raw(struct dentry *dentry, struct iattr *attr,
        if (attr->ia_valid & (ATTR_SIZE | ATTR_ATIME | ATTR_ATIME_SET |
                              ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME) ||
            xvalid & OP_XVALID_CTIME_SET) {
-               /* For truncate and utimes sending attributes to OSTs, setting
-                * mtime/atime to the past will be performed under PW [0:EOF]
-                * extent lock (new_size:EOF for truncate).  It may seem
-                * excessive to send mtime/atime updates to OSTs when not
-                * setting times to past, but it is necessary due to possible
-                * time de-synchronization between MDT inode and OST objects
-                */
-               rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
+               bool cached = false;
+
+               rc = pcc_inode_setattr(inode, attr, &cached);
+               if (cached) {
+                       if (rc) {
+                               CERROR("%s: PCC inode "DFID" setattr failed: "
+                                      "rc = %d\n",
+                                      ll_i2sbi(inode)->ll_fsname,
+                                      PFID(&lli->lli_fid), rc);
+                               GOTO(out, rc);
+                       }
+               } else {
+                       /* For truncate and utimes sending attributes to OSTs,
+                        * setting mtime/atime to the past will be performed
+                        * under PW [0:EOF] extent lock (new_size:EOF for
+                        * truncate). It may seem excessive to send mtime/atime
+                        * updates to OSTs when not setting times to past, but
+                        * it is necessary due to possible time
+                        * de-synchronization between MDT inode and OST objects
+                        */
+                       rc = cl_setattr_ost(lli->lli_clob, attr, xvalid, 0);
+               }
        }
 
        /* If the file was restored, it needs to set dirty flag.