Whamcloud - gitweb
LU-761: Check return of ll_prep_md_op_data() using IS_ERR().
[fs/lustre-release.git] / lustre / llite / llite_lib.c
index b407584..713d581 100644 (file)
  * GPL HEADER END
  */
 /*
- * Copyright  2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  * Use is subject to license terms.
  */
 /*
+ * Copyright (c) 2011 Whamcloud, Inc.
+ */
+/*
  * This file is part of Lustre, http://www.lustre.org/
  * Lustre is a trademark of Sun Microsystems, Inc.
  *
@@ -42,7 +45,6 @@
 
 #include <linux/module.h>
 #include <linux/types.h>
-#include <linux/random.h>
 #include <linux/version.h>
 #include <linux/mm.h>
 
 
 cfs_mem_cache_t *ll_file_data_slab;
 
-LIST_HEAD(ll_super_blocks);
-spinlock_t ll_sb_lock = SPIN_LOCK_UNLOCKED;
+CFS_LIST_HEAD(ll_super_blocks);
+cfs_spinlock_t ll_sb_lock = CFS_SPIN_LOCK_UNLOCKED;
 
+#ifndef MS_HAS_NEW_AOPS
 extern struct address_space_operations ll_aops;
 extern struct address_space_operations ll_dir_aops;
+#else
+extern struct address_space_operations_ext ll_aops;
+extern struct address_space_operations_ext ll_dir_aops;
+#endif
 
 #ifndef log2
-#define log2(n) ffz(~(n))
+#define log2(n) cfs_ffz(~(n))
 #endif
 
 static struct ll_sb_info *ll_init_sbi(void)
@@ -82,10 +89,10 @@ static struct ll_sb_info *ll_init_sbi(void)
         if (!sbi)
                 RETURN(NULL);
 
-        spin_lock_init(&sbi->ll_lock);
-        spin_lock_init(&sbi->ll_lco.lco_lock);
-        spin_lock_init(&sbi->ll_pp_extent_lock);
-        spin_lock_init(&sbi->ll_process_lock);
+        cfs_spin_lock_init(&sbi->ll_lock);
+        cfs_init_mutex(&sbi->ll_lco.lco_lock);
+        cfs_spin_lock_init(&sbi->ll_pp_extent_lock);
+        cfs_spin_lock_init(&sbi->ll_process_lock);
         sbi->ll_rw_stats_on = 0;
 
         si_meminfo(&si);
@@ -100,22 +107,23 @@ static struct ll_sb_info *ll_init_sbi(void)
                 sbi->ll_async_page_max = (pages / 4) * 3;
         }
 
-        sbi->ll_ra_info.ra_max_pages = min(pages / 32,
+        sbi->ll_ra_info.ra_max_pages_per_file = min(pages / 32,
                                            SBI_DEFAULT_READAHEAD_MAX);
+        sbi->ll_ra_info.ra_max_pages = sbi->ll_ra_info.ra_max_pages_per_file;
         sbi->ll_ra_info.ra_max_read_ahead_whole_pages =
                                            SBI_DEFAULT_READAHEAD_WHOLE_MAX;
-        INIT_LIST_HEAD(&sbi->ll_conn_chain);
-        INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
+        CFS_INIT_LIST_HEAD(&sbi->ll_conn_chain);
+        CFS_INIT_LIST_HEAD(&sbi->ll_orphan_dentry_list);
 
         ll_generate_random_uuid(uuid);
         class_uuid_unparse(uuid, &sbi->ll_sb_uuid);
         CDEBUG(D_CONFIG, "generated uuid: %s\n", sbi->ll_sb_uuid.uuid);
 
-        spin_lock(&ll_sb_lock);
-        list_add_tail(&sbi->ll_list, &ll_super_blocks);
-        spin_unlock(&ll_sb_lock);
+        cfs_spin_lock(&ll_sb_lock);
+        cfs_list_add_tail(&sbi->ll_list, &ll_super_blocks);
+        cfs_spin_unlock(&ll_sb_lock);
 
-#ifdef ENABLE_LLITE_CHECKSUM
+#ifdef ENABLE_CHECKSUM
         sbi->ll_flags |= LL_SBI_CHECKSUM;
 #endif
 
@@ -123,17 +131,17 @@ static struct ll_sb_info *ll_init_sbi(void)
         sbi->ll_flags |= LL_SBI_LRU_RESIZE;
 #endif
 
-#ifdef HAVE_EXPORT___IGET
-        INIT_LIST_HEAD(&sbi->ll_deathrow);
-        spin_lock_init(&sbi->ll_deathrow_lock);
-#endif
         for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) {
-                spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].pp_r_hist.oh_lock);
-                spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i].pp_w_hist.oh_lock);
+                cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
+                                   pp_r_hist.oh_lock);
+                cfs_spin_lock_init(&sbi->ll_rw_extents_info.pp_extents[i]. \
+                                   pp_w_hist.oh_lock);
         }
 
         /* metadata statahead is enabled by default */
         sbi->ll_sa_max = LL_SA_RPC_DEF;
+        cfs_atomic_set(&sbi->ll_sa_total, 0);
+        cfs_atomic_set(&sbi->ll_sa_wrong, 0);
 
         RETURN(sbi);
 }
@@ -144,30 +152,31 @@ void ll_free_sbi(struct super_block *sb)
         ENTRY;
 
         if (sbi != NULL) {
-                spin_lock(&ll_sb_lock);
-                list_del(&sbi->ll_list);
-                spin_unlock(&ll_sb_lock);
+                cfs_spin_lock(&ll_sb_lock);
+                cfs_list_del(&sbi->ll_list);
+                cfs_spin_unlock(&ll_sb_lock);
                 OBD_FREE(sbi, sizeof(*sbi));
         }
         EXIT;
 }
 
 static struct dentry_operations ll_d_root_ops = {
-#ifdef DCACHE_LUSTRE_INVALID
         .d_compare = ll_dcompare,
-#endif
+        .d_revalidate = ll_revalidate_nd,
 };
 
-static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
+static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
+                                    struct vfsmount *mnt)
 {
         struct inode *root = 0;
         struct ll_sb_info *sbi = ll_s2sbi(sb);
         struct obd_device *obd;
         struct obd_capa *oc = NULL;
-        struct obd_statfs osfs;
+        struct obd_statfs *osfs = NULL;
         struct ptlrpc_request *request = NULL;
         struct obd_connect_data *data = NULL;
         struct obd_uuid *uuid;
+        struct md_op_data *op_data;
         struct lustre_md lmd;
         obd_valid valid;
         int size, err, checksum;
@@ -183,6 +192,12 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         if (data == NULL)
                 RETURN(-ENOMEM);
 
+        OBD_ALLOC_PTR(osfs);
+        if (osfs == NULL) {
+                OBD_FREE_PTR(data);
+                RETURN(-ENOMEM);
+        }
+
         if (proc_lustre_fs_root) {
                 err = lprocfs_register_mountpoint(proc_lustre_fs_root, sb,
                                                   dt, md);
@@ -192,11 +207,16 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 
         /* indicate the features supported by this client */
         data->ocd_connect_flags = OBD_CONNECT_IBITS    | OBD_CONNECT_NODEVOH  |
-                                  OBD_CONNECT_JOIN     | OBD_CONNECT_ATTRFID  |
-                                  OBD_CONNECT_VERSION  | OBD_CONNECT_MDS_CAPA |
-                                  OBD_CONNECT_OSS_CAPA | OBD_CONNECT_CANCELSET|
-                                  OBD_CONNECT_FID      | OBD_CONNECT_AT |
-                                  OBD_CONNECT_LOV_V3 | OBD_CONNECT_RMT_CLIENT;
+                                  OBD_CONNECT_ATTRFID  |
+                                  OBD_CONNECT_VERSION  | OBD_CONNECT_BRW_SIZE |
+                                  OBD_CONNECT_MDS_CAPA | OBD_CONNECT_OSS_CAPA |
+                                  OBD_CONNECT_CANCELSET | OBD_CONNECT_FID     |
+                                  OBD_CONNECT_AT       | OBD_CONNECT_LOV_V3   |
+                                  OBD_CONNECT_RMT_CLIENT | OBD_CONNECT_VBR    |
+                                  OBD_CONNECT_FULL20   | OBD_CONNECT_64BITHASH;
+
+        if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
+                data->ocd_connect_flags |= OBD_CONNECT_SOM;
 
 #ifdef HAVE_LRU_RESIZE_SUPPORT
         if (sbi->ll_flags & LL_SBI_LRU_RESIZE)
@@ -217,6 +237,9 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         /* force vfs to use lustre handler for flock() calls - bug 10743 */
         sb->s_flags |= MS_FLOCK_LOCK;
 #endif
+#ifdef MS_HAS_NEW_AOPS
+        sb->s_flags |= MS_HAS_NEW_AOPS;
+#endif
 
         if (sbi->ll_flags & LL_SBI_FLOCK)
                 sbi->ll_fop = &ll_file_operations_flock;
@@ -230,6 +253,8 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         if (sbi->ll_flags & LL_SBI_RMT_CLIENT)
                 data->ocd_connect_flags |= OBD_CONNECT_RMT_CLIENT_FORCE;
 
+        data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
+
         err = obd_connect(NULL, &sbi->ll_md_exp, obd, &sbi->ll_sb_uuid, data, NULL);
         if (err == -EBUSY) {
                 LCONSOLE_ERROR_MSG(0x14f, "An MDT (md %s) is performing "
@@ -249,10 +274,35 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 GOTO(out_md, err);
         }
 
-        err = obd_statfs(obd, &osfs, cfs_time_current_64() - HZ, 0);
+        err = obd_statfs(obd, osfs,
+                         cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), 0);
         if (err)
                 GOTO(out_md_fid, err);
 
+        /* This needs to be after statfs to ensure connect has finished.
+         * Note that "data" does NOT contain the valid connect reply.
+         * If connecting to a 1.8 server there will be no LMV device, so
+         * we can access the MDC export directly and exp_connect_flags will
+         * be non-zero, but if accessing an upgraded 2.1 server it will
+         * have the correct flags filled in.
+         * XXX: fill in the LMV exp_connect_flags from MDC(s). */
+        valid = sbi->ll_md_exp->exp_connect_flags & CLIENT_CONNECT_MDT_REQD;
+        if (sbi->ll_md_exp->exp_connect_flags != 0 &&
+            valid != CLIENT_CONNECT_MDT_REQD) {
+                char *buf;
+
+                OBD_ALLOC_WAIT(buf, CFS_PAGE_SIZE);
+                obd_connect_flags2str(buf, CFS_PAGE_SIZE,
+                                      valid ^ CLIENT_CONNECT_MDT_REQD, ",");
+                LCONSOLE_ERROR_MSG(0x170, "Server %s does not support "
+                                   "feature(s) needed for correct operation "
+                                   "of this client (%s). Please upgrade "
+                                   "server or downgrade client.\n",
+                                   sbi->ll_md_exp->exp_obd->obd_name, buf);
+                OBD_FREE(buf, CFS_PAGE_SIZE);
+                GOTO(out_md, err = -EPROTO);
+        }
+
         size = sizeof(*data);
         err = obd_get_info(sbi->ll_md_exp, sizeof(KEY_CONN_DATA),
                            KEY_CONN_DATA,  &size, data, NULL);
@@ -261,9 +311,9 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 GOTO(out_md, err);
         }
 
-        LASSERT(osfs.os_bsize);
-        sb->s_blocksize = osfs.os_bsize;
-        sb->s_blocksize_bits = log2(osfs.os_bsize);
+        LASSERT(osfs->os_bsize);
+        sb->s_blocksize = osfs->os_bsize;
+        sb->s_blocksize_bits = log2(osfs->os_bsize);
         sb->s_magic = LL_SUPER_MAGIC;
 
         /* for bug 11559. in $LINUX/fs/read_write.c, function do_sendfile():
@@ -273,13 +323,13 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
          *
          * it will check if *ppos is greater than max. However, max equals to
          * s_maxbytes, which is a negative integer in a x86_64 box since loff_t
-         * has been defined as a signed long long ineger in linux kernel. */
+         * has been defined as a signed long long integer in linux kernel. */
 #if BITS_PER_LONG == 64
         sb->s_maxbytes = PAGE_CACHE_MAXBYTES >> 1;
 #else
         sb->s_maxbytes = PAGE_CACHE_MAXBYTES;
 #endif
-        sbi->ll_namelen = osfs.os_namelen;
+        sbi->ll_namelen = osfs->os_namelen;
         sbi->ll_max_rw_chunk = LL_DEFAULT_MAX_RW_CHUNK;
 
         if ((sbi->ll_flags & LL_SBI_USER_XATTR) &&
@@ -302,9 +352,6 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 sbi->ll_flags &= ~LL_SBI_ACL;
         }
 
-        if (data->ocd_connect_flags & OBD_CONNECT_JOIN)
-                sbi->ll_flags |= LL_SBI_JOIN;
-
         if (data->ocd_connect_flags & OBD_CONNECT_RMT_CLIENT) {
                 if (!(sbi->ll_flags & LL_SBI_RMT_CLIENT)) {
                         sbi->ll_flags |= LL_SBI_RMT_CLIENT;
@@ -328,6 +375,14 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 sbi->ll_flags |= LL_SBI_OSS_CAPA;
         }
 
+        if (data->ocd_connect_flags & OBD_CONNECT_64BITHASH)
+                sbi->ll_flags |= LL_SBI_64BIT_HASH;
+
+        if (data->ocd_connect_flags & OBD_CONNECT_BRW_SIZE)
+                sbi->ll_md_brw_size = data->ocd_brw_size;
+        else
+                sbi->ll_md_brw_size = CFS_PAGE_SIZE;
+
         obd = class_name2obd(dt);
         if (!obd) {
                 CERROR("DT %s: not setup or attached\n", dt);
@@ -339,7 +394,12 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                                   OBD_CONNECT_CANCELSET | OBD_CONNECT_FID      |
                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
-                                  OBD_CONNECT_OSS_CAPA;
+                                  OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
+                                  OBD_CONNECT_FULL20 | OBD_CONNECT_64BITHASH |
+                                  OBD_CONNECT_MAXBYTES;
+
+        if (sbi->ll_flags & LL_SBI_SOM_PREVIEW)
+                data->ocd_connect_flags |= OBD_CONNECT_SOM;
 
         if (!OBD_FAIL_CHECK(OBD_FAIL_OSC_CONNECT_CKSUM)) {
                 /* OBD_CONNECT_CKSUM should always be set, even if checksums are
@@ -351,8 +411,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 if (OBD_FAIL_CHECK(OBD_FAIL_OSC_CKSUM_ADLER_ONLY))
                         data->ocd_cksum_types = OBD_CKSUM_ADLER;
                 else
-                        /* send the list of supported checksum types */
-                        data->ocd_cksum_types = OBD_CKSUM_ALL;
+                        data->ocd_cksum_types = cksum_types_supported();
         }
 
 #ifdef HAVE_LRU_RESIZE_SUPPORT
@@ -367,7 +426,8 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
 
         obd->obd_upcall.onu_owner = &sbi->ll_lco;
         obd->obd_upcall.onu_upcall = cl_ocd_update;
-        data->ocd_brw_size = PTLRPC_MAX_BRW_PAGES << CFS_PAGE_SHIFT;
+
+        data->ocd_brw_size = PTLRPC_MAX_BRW_SIZE;
 
         err = obd_connect(NULL, &sbi->ll_dt_exp, obd, &sbi->ll_sb_uuid, data, NULL);
         if (err == -EBUSY) {
@@ -388,11 +448,11 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 GOTO(out_dt, err);
         }
 
-        spin_lock(&sbi->ll_lco.lco_lock);
+        cfs_mutex_down(&sbi->ll_lco.lco_lock);
         sbi->ll_lco.lco_flags = data->ocd_connect_flags;
         sbi->ll_lco.lco_md_exp = sbi->ll_md_exp;
         sbi->ll_lco.lco_dt_exp = sbi->ll_dt_exp;
-        spin_unlock(&sbi->ll_lco.lco_lock);
+        cfs_mutex_up(&sbi->ll_lco.lco_lock);
 
         fid_zero(&sbi->ll_root_fid);
         err = md_getstatus(sbi->ll_md_exp, &sbi->ll_root_fid, &oc);
@@ -407,7 +467,9 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         CDEBUG(D_SUPER, "rootfid "DFID"\n", PFID(&sbi->ll_root_fid));
 
         sb->s_op = &lustre_super_operations;
+#if THREAD_SIZE >= 8192
         sb->s_export_op = &lustre_export_operations;
+#endif
 
         /* make root inode
          * XXX: move this to after cbd setup? */
@@ -417,15 +479,23 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         else if (sbi->ll_flags & LL_SBI_ACL)
                 valid |= OBD_MD_FLACL;
 
-        err = md_getattr(sbi->ll_md_exp, &sbi->ll_root_fid, oc, valid, 0,
-                         &request);
+        OBD_ALLOC_PTR(op_data);
+        if (op_data == NULL)
+                GOTO(out_lock_cn_cb, err = -ENOMEM);
+
+        op_data->op_fid1 = sbi->ll_root_fid;
+        op_data->op_mode = 0;
+        op_data->op_capa1 = oc;
+        op_data->op_valid = valid;
+
+        err = md_getattr(sbi->ll_md_exp, op_data, &request);
         if (oc)
                 capa_put(oc);
+        OBD_FREE_PTR(op_data);
         if (err) {
                 CERROR("md_getattr failed for root: rc = %d\n", err);
                 GOTO(out_lock_cn_cb, err);
         }
-        memset(&lmd, 0, sizeof(lmd));
         err = md_get_lustre_md(sbi->ll_md_exp, request, sbi->ll_dt_exp,
                                sbi->ll_md_exp, &lmd);
         if (err) {
@@ -435,7 +505,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         }
 
         LASSERT(fid_is_sane(&sbi->ll_root_fid));
-        root = ll_iget(sb, ll_fid_build_ino(sbi, &sbi->ll_root_fid), &lmd);
+        root = ll_iget(sb, cl_fid_build_ino(&sbi->ll_root_fid, 0), &lmd);
         md_free_lustre_md(sbi->ll_md_exp, &lmd);
         ptlrpc_req_finished(request);
 
@@ -474,9 +544,6 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         cl_sb_init(sb);
 
         sb->s_root = d_alloc_root(root);
-        if (data != NULL)
-                OBD_FREE(data, sizeof(*data));
-
         sb->s_root->d_op = &ll_d_root_ops;
 
         sbi->ll_sdev_orig = sb->s_dev;
@@ -489,6 +556,12 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         uuid = obd_get_uuid(sbi->ll_md_exp);
         if (uuid != NULL)
                 sb->s_dev = get_uuid2int(uuid->uuid, strlen(uuid->uuid));
+        sbi->ll_mnt = mnt;
+
+        if (data != NULL)
+                OBD_FREE_PTR(data);
+        if (osfs != NULL)
+                OBD_FREE_PTR(osfs);
 
         RETURN(err);
 out_root:
@@ -507,6 +580,8 @@ out_md:
 out:
         if (data != NULL)
                 OBD_FREE_PTR(data);
+        if (osfs != NULL)
+                OBD_FREE_PTR(osfs);
         lprocfs_unregister_mountpoint(sbi);
         return err;
 }
@@ -562,109 +637,12 @@ void lustre_dump_dentry(struct dentry *dentry, int recur)
         if (recur == 0)
                 return;
 
-        list_for_each(tmp, &dentry->d_subdirs) {
+       list_for_each(tmp, &dentry->d_subdirs) {
                 struct dentry *d = list_entry(tmp, struct dentry, d_child);
                 lustre_dump_dentry(d, recur - 1);
         }
 }
 
-#ifdef HAVE_EXPORT___IGET
-static void prune_dir_dentries(struct inode *inode)
-{
-        struct dentry *dentry, *prev = NULL;
-
-        /* due to lustre specific logic, a directory
-         * can have few dentries - a bug from VFS POV */
-restart:
-        spin_lock(&dcache_lock);
-        if (!list_empty(&inode->i_dentry)) {
-                dentry = list_entry(inode->i_dentry.prev,
-                                    struct dentry, d_alias);
-                /* in order to prevent infinite loops we
-                 * break if previous dentry is busy */
-                if (dentry != prev) {
-                        prev = dentry;
-                        dget_locked(dentry);
-                        spin_unlock(&dcache_lock);
-
-                        /* try to kill all child dentries */
-                        lock_dentry(dentry);
-                        shrink_dcache_parent(dentry);
-                        unlock_dentry(dentry);
-                        dput(dentry);
-
-                        /* now try to get rid of current dentry */
-                        d_prune_aliases(inode);
-                        goto restart;
-                }
-        }
-        spin_unlock(&dcache_lock);
-}
-
-static void prune_deathrow_one(struct ll_inode_info *lli)
-{
-        struct inode *inode = ll_info2i(lli);
-
-        /* first, try to drop any dentries - they hold a ref on the inode */
-        if (S_ISDIR(inode->i_mode))
-                prune_dir_dentries(inode);
-        else
-                d_prune_aliases(inode);
-
-
-        /* if somebody still uses it, leave it */
-        LASSERT(atomic_read(&inode->i_count) > 0);
-        if (atomic_read(&inode->i_count) > 1)
-                goto out;
-
-        CDEBUG(D_INODE, "inode %lu/%u(%d) looks a good candidate for prune\n",
-               inode->i_ino,inode->i_generation, atomic_read(&inode->i_count));
-
-        /* seems nobody uses it anymore */
-        inode->i_nlink = 0;
-
-out:
-        iput(inode);
-        return;
-}
-
-static void prune_deathrow(struct ll_sb_info *sbi, int try)
-{
-        struct ll_inode_info *lli;
-        int empty;
-
-        do {
-                if (need_resched() && try)
-                        break;
-
-                if (try) {
-                        if (!spin_trylock(&sbi->ll_deathrow_lock))
-                                break;
-                } else {
-                        spin_lock(&sbi->ll_deathrow_lock);
-                }
-
-                empty = 1;
-                lli = NULL;
-                if (!list_empty(&sbi->ll_deathrow)) {
-                        lli = list_entry(sbi->ll_deathrow.next,
-                                         struct ll_inode_info,
-                                         lli_dead_list);
-                        list_del_init(&lli->lli_dead_list);
-                        if (!list_empty(&sbi->ll_deathrow))
-                                empty = 0;
-                }
-                spin_unlock(&sbi->ll_deathrow_lock);
-
-                if (lli)
-                        prune_deathrow_one(lli);
-
-        } while (empty == 0);
-}
-#else /* !HAVE_EXPORT___IGET */
-#define prune_deathrow(sbi, try) do {} while (0)
-#endif /* HAVE_EXPORT___IGET */
-
 void client_common_put_super(struct super_block *sb)
 {
         struct ll_sb_info *sbi = ll_s2sbi(sb);
@@ -681,10 +659,9 @@ void client_common_put_super(struct super_block *sb)
 
         ll_close_thread_shutdown(sbi->ll_lcq);
 
-        /* destroy inodes in deathrow */
-        prune_deathrow(sbi, 0);
+        cl_sb_fini(sb);
 
-        list_del(&sbi->ll_conn_chain);
+        cfs_list_del(&sbi->ll_conn_chain);
 
         obd_fid_fini(sbi->ll_dt_exp);
         obd_disconnect(sbi->ll_dt_exp);
@@ -794,17 +771,25 @@ static int ll_options(char *options, int *flags)
                         *flags &= ~tmp;
                         goto next;
                 }
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2,5,50,0)
                 tmp = ll_set_opt("acl", s1, LL_SBI_ACL);
                 if (tmp) {
                         /* Ignore deprecated mount option.  The client will
                          * always try to mount with ACL support, whether this
                          * is used depends on whether server supports it. */
+                        LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
+                                                  "mount option 'acl'.\n");
                         goto next;
                 }
                 tmp = ll_set_opt("noacl", s1, LL_SBI_ACL);
                 if (tmp) {
+                        LCONSOLE_ERROR_MSG(0x152, "Ignoring deprecated "
+                                                  "mount option 'noacl'.\n");
                         goto next;
                 }
+#else
+#warning "{no}acl options have been deprecated since 1.8, please remove them"
+#endif
                 tmp = ll_set_opt("remote_client", s1, LL_SBI_RMT_CLIENT);
                 if (tmp) {
                         *flags |= tmp;
@@ -831,6 +816,26 @@ static int ll_options(char *options, int *flags)
                         *flags &= ~tmp;
                         goto next;
                 }
+                tmp = ll_set_opt("lazystatfs", s1, LL_SBI_LAZYSTATFS);
+                if (tmp) {
+                        *flags |= tmp;
+                        goto next;
+                }
+                tmp = ll_set_opt("nolazystatfs", s1, LL_SBI_LAZYSTATFS);
+                if (tmp) {
+                        *flags &= ~tmp;
+                        goto next;
+                }
+                tmp = ll_set_opt("som_preview", s1, LL_SBI_SOM_PREVIEW);
+                if (tmp) {
+                        *flags |= tmp;
+                        goto next;
+                }
+                tmp = ll_set_opt("32bitapi", s1, LL_SBI_32BIT_API);
+                if (tmp) {
+                        *flags |= tmp;
+                        goto next;
+                }
 
                 LCONSOLE_ERROR_MSG(0x152, "Unknown option '%s', won't mount.\n",
                                    s1);
@@ -849,46 +854,71 @@ next:
 void ll_lli_init(struct ll_inode_info *lli)
 {
         lli->lli_inode_magic = LLI_INODE_MAGIC;
-        sema_init(&lli->lli_size_sem, 1);
-        sema_init(&lli->lli_write_sem, 1);
+        cfs_sema_init(&lli->lli_size_sem, 1);
+        cfs_sema_init(&lli->lli_write_sem, 1);
+        cfs_init_rwsem(&lli->lli_trunc_sem);
         lli->lli_flags = 0;
         lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
-        spin_lock_init(&lli->lli_lock);
-        INIT_LIST_HEAD(&lli->lli_pending_write_llaps);
-        INIT_LIST_HEAD(&lli->lli_close_list);
+        cfs_spin_lock_init(&lli->lli_lock);
+        CFS_INIT_LIST_HEAD(&lli->lli_close_list);
         lli->lli_inode_magic = LLI_INODE_MAGIC;
-        sema_init(&lli->lli_och_sem, 1);
+        cfs_sema_init(&lli->lli_och_sem, 1);
         lli->lli_mds_read_och = lli->lli_mds_write_och = NULL;
         lli->lli_mds_exec_och = NULL;
         lli->lli_open_fd_read_count = lli->lli_open_fd_write_count = 0;
         lli->lli_open_fd_exec_count = 0;
-        INIT_LIST_HEAD(&lli->lli_dead_list);
+        CFS_INIT_LIST_HEAD(&lli->lli_dead_list);
         lli->lli_remote_perms = NULL;
         lli->lli_rmtperm_utime = 0;
-        sema_init(&lli->lli_rmtperm_sem, 1);
-        INIT_LIST_HEAD(&lli->lli_oss_capas);
+        cfs_sema_init(&lli->lli_rmtperm_sem, 1);
+        CFS_INIT_LIST_HEAD(&lli->lli_oss_capas);
+        cfs_spin_lock_init(&lli->lli_sa_lock);
+        lli->lli_clob = NULL;
+        cfs_sema_init(&lli->lli_readdir_sem, 1);
+        fid_zero(&lli->lli_pfid);
 }
 
-int ll_fill_super(struct super_block *sb)
+static inline int ll_bdi_register(struct backing_dev_info *bdi)
 {
-        struct lustre_profile *lprof;
+#ifdef HAVE_BDI_REGISTER
+        static atomic_t ll_bdi_num = ATOMIC_INIT(0);
+
+#ifdef HAVE_BDI_NAME
+        bdi->name = "lustre";
+#endif
+        return bdi_register(bdi, NULL, "lustre-%d",
+                            atomic_inc_return(&ll_bdi_num));
+#else
+        return 0;
+#endif
+}
+
+int ll_fill_super(struct super_block *sb, struct vfsmount *mnt)
+{
+        struct lustre_profile *lprof = NULL;
         struct lustre_sb_info *lsi = s2lsi(sb);
         struct ll_sb_info *sbi;
         char  *dt = NULL, *md = NULL;
         char  *profilenm = get_profile_name(sb);
-        struct config_llog_instance cfg = {0, };
-        char   ll_instance[sizeof(sb) * 2 + 1];
+        struct config_llog_instance *cfg;
+        /* %p for void* in printf needs 16+2 characters: 0xffffffffffffffff */
+        const int instlen = sizeof(cfg->cfg_instance) * 2 + 2;
         int    err;
         ENTRY;
 
         CDEBUG(D_VFSTRACE, "VFS Op: sb %p\n", sb);
 
+        OBD_ALLOC_PTR(cfg);
+        if (cfg == NULL)
+                RETURN(-ENOMEM);
+
         cfs_module_get();
 
         /* client additional sb info */
         lsi->lsi_llsbi = sbi = ll_init_sbi();
         if (!sbi) {
-                cfs_module_put();
+                cfs_module_put(THIS_MODULE);
+                OBD_FREE_PTR(cfg);
                 RETURN(-ENOMEM);
         }
 
@@ -896,20 +926,33 @@ int ll_fill_super(struct super_block *sb)
         if (err)
                 GOTO(out_free, err);
 
+        err = ll_bdi_init(&lsi->lsi_bdi);
+        if (err)
+                GOTO(out_free, err);
+        lsi->lsi_flags |= LSI_BDI_INITIALIZED;
+        lsi->lsi_bdi.capabilities = BDI_CAP_MAP_COPY;
+        err = ll_bdi_register(&lsi->lsi_bdi);
+        if (err)
+                GOTO(out_free, err);
+
+#ifdef HAVE_SB_BDI
+        sb->s_bdi = &lsi->lsi_bdi;
+#endif
+
         /* Generate a string unique to this super, in case some joker tries
            to mount the same fs at two mount points.
            Use the address of the super itself.*/
-        sprintf(ll_instance, "%p", sb);
-        cfg.cfg_instance = ll_instance;
-        cfg.cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
+        cfg->cfg_instance = sb;
+        cfg->cfg_uuid = lsi->lsi_llsbi->ll_sb_uuid;
 
         /* set up client obds */
-        err = lustre_process_log(sb, profilenm, &cfg);
+        err = lustre_process_log(sb, profilenm, cfg);
         if (err < 0) {
                 CERROR("Unable to process log: %d\n", err);
                 GOTO(out_free, err);
         }
 
+        /* Profile set with LCFG_MOUNTOPT so we can find our mdc and osc obds */
         lprof = class_get_profile(profilenm);
         if (lprof == NULL) {
                 LCONSOLE_ERROR_MSG(0x156, "The client profile '%s' could not be"
@@ -920,31 +963,30 @@ int ll_fill_super(struct super_block *sb)
         CDEBUG(D_CONFIG, "Found profile %s: mdc=%s osc=%s\n", profilenm,
                lprof->lp_md, lprof->lp_dt);
 
-        OBD_ALLOC(dt, strlen(lprof->lp_dt) +
-                  strlen(ll_instance) + 2);
+        OBD_ALLOC(dt, strlen(lprof->lp_dt) + instlen + 2);
         if (!dt)
                 GOTO(out_free, err = -ENOMEM);
-        sprintf(dt, "%s-%s", lprof->lp_dt, ll_instance);
+        sprintf(dt, "%s-%p", lprof->lp_dt, cfg->cfg_instance);
 
-        OBD_ALLOC(md, strlen(lprof->lp_md) +
-                  strlen(ll_instance) + 2);
+        OBD_ALLOC(md, strlen(lprof->lp_md) + instlen + 2);
         if (!md)
                 GOTO(out_free, err = -ENOMEM);
-        sprintf(md, "%s-%s", lprof->lp_md, ll_instance);
+        sprintf(md, "%s-%p", lprof->lp_md, cfg->cfg_instance);
 
         /* connections, registrations, sb setup */
-        err = client_common_fill_super(sb, md, dt);
+        err = client_common_fill_super(sb, md, dt, mnt);
 
 out_free:
         if (md)
-                OBD_FREE(md, strlen(md) + 1);
+                OBD_FREE(md, strlen(lprof->lp_md) + instlen + 2);
         if (dt)
-                OBD_FREE(dt, strlen(dt) + 1);
+                OBD_FREE(dt, strlen(lprof->lp_dt) + instlen + 2);
         if (err)
                 ll_put_super(sb);
         else
                 LCONSOLE_WARN("Client %s has started\n", profilenm);
 
+        OBD_FREE_PTR(cfg);
         RETURN(err);
 } /* ll_fill_super */
 
@@ -954,7 +996,6 @@ void lu_context_keys_dump(void);
 void ll_put_super(struct super_block *sb)
 {
         struct config_llog_instance cfg;
-        char   ll_instance[sizeof(sb) * 2 + 1];
         struct obd_device *obd;
         struct lustre_sb_info *lsi = s2lsi(sb);
         struct ll_sb_info *sbi = ll_s2sbi(sb);
@@ -966,9 +1007,8 @@ void ll_put_super(struct super_block *sb)
 
         ll_print_capa_stat(sbi);
 
-        sprintf(ll_instance, "%p", sb);
-        cfg.cfg_instance = ll_instance;
-        lustre_end_log(sb, NULL, &cfg);
+        cfg.cfg_instance = sb;
+        lustre_end_log(sb, profilenm, &cfg);
 
         if (sbi->ll_md_exp) {
                 obd = class_exp2obd(sbi->ll_md_exp);
@@ -986,12 +1026,11 @@ void ll_put_super(struct super_block *sb)
                 }
         }
 
-        cl_sb_fini(sb);
-
         if (sbi->ll_lcq) {
                 /* Only if client_common_fill_super succeeded */
                 client_common_put_super(sb);
         }
+
         next = 0;
         while ((obd = class_devices_in_group(&sbi->ll_sb_uuid, &next)) !=NULL) {
                 class_manual_cleanup(obd);
@@ -1000,6 +1039,11 @@ void ll_put_super(struct super_block *sb)
         if (profilenm)
                 class_del_profile(profilenm);
 
+        if (lsi->lsi_flags & LSI_BDI_INITIALIZED) {
+                ll_bdi_destroy(&lsi->lsi_bdi);
+                lsi->lsi_flags &= ~LSI_BDI_INITIALIZED;
+        }
+
         ll_free_sbi(sb);
         lsi->lsi_llsbi = NULL;
 
@@ -1007,9 +1051,9 @@ void ll_put_super(struct super_block *sb)
 
         cl_env_cache_purge(~0);
 
-        LCONSOLE_WARN("client %s umount complete\n", ll_instance);
+        LCONSOLE_WARN("client %p umount complete\n", cfg.cfg_instance);
 
-        cfs_module_put();
+        cfs_module_put(THIS_MODULE);
 
         EXIT;
 } /* client_put_super */
@@ -1025,11 +1069,10 @@ struct inode *ll_inode_from_lock(struct ldlm_lock *lock)
                         inode = igrab(lock->l_ast_data);
                 } else {
                         inode = lock->l_ast_data;
-                        ldlm_lock_debug(NULL, inode->i_state & I_FREEING ?
-                                                D_INFO : D_WARNING,
-                                        lock, __FILE__, __func__, __LINE__,
-                                        "l_ast_data %p is bogus: magic %08x",
-                                        lock->l_ast_data, lli->lli_inode_magic);
+                        LDLM_DEBUG_LIMIT(inode->i_state & I_FREEING ?  D_INFO :
+                                         D_WARNING, lock, "l_ast_data %p is "
+                                         "bogus: magic %08x", lock->l_ast_data,
+                                         lli->lli_inode_magic);
                         inode = NULL;
                 }
         }
@@ -1095,7 +1138,7 @@ void ll_clear_inode(struct inode *inode)
         }
 #ifdef CONFIG_FS_POSIX_ACL
         else if (lli->lli_posix_acl) {
-                LASSERT(atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
+                LASSERT(cfs_atomic_read(&lli->lli_posix_acl->a_refcount) == 1);
                 LASSERT(lli->lli_remote_perms == NULL);
                 posix_acl_release(lli->lli_posix_acl);
                 lli->lli_posix_acl = NULL;
@@ -1103,11 +1146,6 @@ void ll_clear_inode(struct inode *inode)
 #endif
         lli->lli_inode_magic = LLI_INODE_DEAD;
 
-#ifdef HAVE_EXPORT___IGET
-        spin_lock(&sbi->ll_deathrow_lock);
-        list_del_init(&lli->lli_dead_list);
-        spin_unlock(&sbi->ll_deathrow_lock);
-#endif
         ll_clear_inode_capas(inode);
         /*
          * XXX This has to be done before lsm is freed below, because
@@ -1195,13 +1233,15 @@ static int ll_setattr_done_writing(struct inode *inode,
         CDEBUG(D_INODE, "Epoch "LPU64" closed on "DFID" for truncate\n",
                op_data->op_ioepoch, PFID(&lli->lli_fid));
 
-        op_data->op_flags = MF_EPOCH_CLOSE | MF_SOM_CHANGE;
+        op_data->op_flags = MF_EPOCH_CLOSE;
+        ll_done_writing_attr(inode, op_data);
+        ll_pack_inode2opdata(inode, op_data, NULL);
+
         rc = md_done_writing(ll_i2sbi(inode)->ll_md_exp, op_data, mod);
         if (rc == -EAGAIN) {
                 /* MDS has instructed us to obtain Size-on-MDS attribute
                  * from OSTs and send setattr to back to MDS. */
-                rc = ll_sizeonmds_update(inode, mod, &op_data->op_handle,
-                                         op_data->op_ioepoch);
+                rc = ll_som_update(inode, op_data);
         } else if (rc) {
                 CERROR("inode %lu mdc truncate failed: rc = %d\n",
                        inode->i_ino, rc);
@@ -1209,23 +1249,22 @@ static int ll_setattr_done_writing(struct inode *inode,
         RETURN(rc);
 }
 
-static int ll_setattr_do_truncate(struct inode *inode, loff_t size)
+static int ll_setattr_ost(struct inode *inode, struct iattr *attr)
 {
-        struct obd_capa *capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
+        struct obd_capa *capa;
         int rc;
 
-        rc = cl_setattr_do_truncate(inode, size, capa);
-        ll_truncate_free_capa(capa);
-        return rc;
-}
+        if (attr->ia_valid & ATTR_SIZE)
+                capa = ll_osscapa_get(inode, CAPA_OPC_OSS_TRUNC);
+        else
+                capa = ll_mdscapa_get(inode);
 
-static int ll_setattr_ost(struct inode *inode)
-{
-        struct obd_capa *capa = ll_mdscapa_get(inode);
-        int rc;
+        rc = cl_setattr_ost(inode, attr, capa);
 
-        rc = cl_setattr_ost(inode, capa);
-        capa_put(capa);
+        if (attr->ia_valid & ATTR_SIZE)
+                ll_truncate_free_capa(capa);
+        else
+                capa_put(capa);
 
         return rc;
 }
@@ -1269,34 +1308,24 @@ int ll_setattr_raw(struct inode *inode, struct iattr *attr)
 
         /* POSIX: check before ATTR_*TIME_SET set (from inode_change_ok) */
         if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET)) {
-                if (current->fsuid != inode->i_uid &&
+                if (cfs_curproc_fsuid() != inode->i_uid &&
                     !cfs_capable(CFS_CAP_FOWNER))
                         RETURN(-EPERM);
         }
 
         /* We mark all of the fields "set" so MDS/OST does not re-set them */
         if (attr->ia_valid & ATTR_CTIME) {
-                attr->ia_ctime = CURRENT_TIME;
+                attr->ia_ctime = CFS_CURRENT_TIME;
                 attr->ia_valid |= ATTR_CTIME_SET;
         }
         if (!(ia_valid & ATTR_ATIME_SET) && (attr->ia_valid & ATTR_ATIME)) {
-                attr->ia_atime = CURRENT_TIME;
+                attr->ia_atime = CFS_CURRENT_TIME;
                 attr->ia_valid |= ATTR_ATIME_SET;
         }
         if (!(ia_valid & ATTR_MTIME_SET) && (attr->ia_valid & ATTR_MTIME)) {
-                attr->ia_mtime = CURRENT_TIME;
+                attr->ia_mtime = CFS_CURRENT_TIME;
                 attr->ia_valid |= ATTR_MTIME_SET;
         }
-        if ((attr->ia_valid & ATTR_CTIME) && !(attr->ia_valid & ATTR_MTIME)) {
-                /* To avoid stale mtime on mds, obtain it from ost and send
-                   to mds. */
-                rc = cl_glimpse_size(inode);
-                if (rc)
-                        RETURN(rc);
-
-                attr->ia_valid |= ATTR_MTIME_SET | ATTR_MTIME;
-                attr->ia_mtime = inode->i_mtime;
-        }
 
         if (attr->ia_valid & (ATTR_MTIME | ATTR_CTIME))
                 CDEBUG(D_INODE, "setting mtime %lu, ctime %lu, now = %lu\n",
@@ -1315,33 +1344,43 @@ int ll_setattr_raw(struct inode *inode, struct iattr *attr)
         if (op_data == NULL)
                 RETURN(-ENOMEM);
 
+        UNLOCK_INODE_MUTEX(inode);
+        if (ia_valid & ATTR_SIZE)
+                UP_WRITE_I_ALLOC_SEM(inode);
+        cfs_down_write(&lli->lli_trunc_sem);
+        LOCK_INODE_MUTEX(inode);
+        if (ia_valid & ATTR_SIZE)
+                DOWN_WRITE_I_ALLOC_SEM(inode);
+
         memcpy(&op_data->op_attr, attr, sizeof(*attr));
 
         /* Open epoch for truncate. */
-        if ((ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) &&
-            (ia_valid & ATTR_SIZE))
+        if (exp_connect_som(ll_i2mdexp(inode)) &&
+            (ia_valid & (ATTR_SIZE | ATTR_MTIME | ATTR_MTIME_SET)))
                 op_data->op_flags = MF_EPOCH_OPEN;
 
         rc = ll_md_setattr(inode, op_data, &mod);
         if (rc)
                 GOTO(out, rc);
 
-        if (op_data->op_ioepoch)
-                CDEBUG(D_INODE, "Epoch "LPU64" opened on "DFID" for "
-                       "truncate\n", op_data->op_ioepoch, PFID(&lli->lli_fid));
-
+        ll_ioepoch_open(lli, op_data->op_ioepoch);
         if (!lsm || !S_ISREG(inode->i_mode)) {
                 CDEBUG(D_INODE, "no lsm: not setting attrs on OST\n");
                 GOTO(out, rc = 0);
         }
 
         if (ia_valid & ATTR_SIZE)
-                rc = ll_setattr_do_truncate(inode, attr->ia_size);
-        else if (ia_valid & (ATTR_MTIME | ATTR_MTIME_SET)) {
-                CDEBUG(D_INODE, "set mtime on OST inode %lu to %lu\n",
-                       inode->i_ino, LTIME_S(attr->ia_mtime));
-                rc = ll_setattr_ost(inode);
-        }
+                attr->ia_valid |= ATTR_SIZE;
+        if (ia_valid & (ATTR_SIZE |
+                        ATTR_ATIME | ATTR_ATIME_SET |
+                        ATTR_MTIME | ATTR_MTIME_SET))
+                /* on truncate and utimes send attributes to osts, setting
+                 * mtime/atime to 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 */
+                rc = ll_setattr_ost(inode, attr);
         EXIT;
 out:
         if (op_data) {
@@ -1349,21 +1388,31 @@ out:
                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
                 ll_finish_md_op_data(op_data);
         }
+        cfs_up_write(&lli->lli_trunc_sem);
         return rc ? rc : rc1;
 }
 
 int ll_setattr(struct dentry *de, struct iattr *attr)
 {
+        int mode = de->d_inode->i_mode;
+
         if ((attr->ia_valid & (ATTR_CTIME|ATTR_SIZE|ATTR_MODE)) ==
-            (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
+                              (ATTR_CTIME|ATTR_SIZE|ATTR_MODE))
                 attr->ia_valid |= MDS_OPEN_OWNEROVERRIDE;
 
-        if ((de->d_inode->i_mode & S_ISUID) &&
+        if (((attr->ia_valid & (ATTR_MODE|ATTR_FORCE|ATTR_SIZE)) ==
+                               (ATTR_SIZE|ATTR_MODE)) &&
+            (((mode & S_ISUID) && !(attr->ia_mode & S_ISUID)) ||
+             (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
+              !(attr->ia_mode & S_ISGID))))
+                attr->ia_valid |= ATTR_FORCE;
+
+        if ((mode & S_ISUID) &&
             !(attr->ia_mode & S_ISUID) &&
             !(attr->ia_valid & ATTR_KILL_SUID))
                 attr->ia_valid |= ATTR_KILL_SUID;
 
-        if (((de->d_inode->i_mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
+        if (((mode & (S_ISGID|S_IXGRP)) == (S_ISGID|S_IXGRP)) &&
             !(attr->ia_mode & S_ISGID) &&
             !(attr->ia_valid & ATTR_KILL_SGID))
                 attr->ia_valid |= ATTR_KILL_SGID;
@@ -1390,6 +1439,9 @@ int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs,
         CDEBUG(D_SUPER, "MDC blocks "LPU64"/"LPU64" objects "LPU64"/"LPU64"\n",
                osfs->os_bavail, osfs->os_blocks, osfs->os_ffree,osfs->os_files);
 
+        if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
+                flags |= OBD_STATFS_NODELAY;
+
         rc = obd_statfs_rqset(class_exp2obd(sbi->ll_dt_exp),
                               &obd_osfs, max_age, flags);
         if (rc) {
@@ -1432,10 +1484,10 @@ int ll_statfs(struct dentry *de, struct kstatfs *sfs)
         CDEBUG(D_VFSTRACE, "VFS Op: at "LPU64" jiffies\n", get_jiffies_64());
         ll_stats_ops_tally(ll_s2sbi(sb), LPROC_LL_STAFS, 1);
 
-        /* For now we will always get up-to-date statfs values, but in the
-         * future we may allow some amount of caching on the client (e.g.
-         * from QOS or lprocfs updates). */
-        rc = ll_statfs_internal(sb, &osfs, cfs_time_current_64() - 1, 0);
+        /* Some amount of caching on the client is allowed */
+        rc = ll_statfs_internal(sb, &osfs,
+                                cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS),
+                                0);
         if (rc)
                 return rc;
 
@@ -1469,7 +1521,7 @@ void ll_inode_size_lock(struct inode *inode, int lock_lsm)
 
         lli = ll_i2info(inode);
         LASSERT(lli->lli_size_sem_owner != current);
-        down(&lli->lli_size_sem);
+        cfs_down(&lli->lli_size_sem);
         LASSERT(lli->lli_size_sem_owner == NULL);
         lli->lli_size_sem_owner = current;
         lsm = lli->lli_smd;
@@ -1492,24 +1544,7 @@ void ll_inode_size_unlock(struct inode *inode, int unlock_lsm)
                 lov_stripe_unlock(lsm);
         LASSERT(lli->lli_size_sem_owner == current);
         lli->lli_size_sem_owner = NULL;
-        up(&lli->lli_size_sem);
-}
-
-static void ll_replace_lsm(struct inode *inode, struct lov_stripe_md *lsm)
-{
-        struct ll_inode_info *lli = ll_i2info(inode);
-
-        dump_lsm(D_INODE, lsm);
-        dump_lsm(D_INODE, lli->lli_smd);
-        LASSERTF(lsm->lsm_magic == LOV_MAGIC_JOIN,
-                 "lsm must be joined lsm %p\n", lsm);
-        obd_free_memmd(ll_i2dtexp(inode), &lli->lli_smd);
-        CDEBUG(D_INODE, "replace lsm %p to lli_smd %p for inode %lu%u(%p)\n",
-               lsm, lli->lli_smd, inode->i_ino, inode->i_generation, inode);
-        lli->lli_smd = lsm;
-        lli->lli_maxbytes = lsm->lsm_maxbytes;
-        if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
-                lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
+        cfs_up(&lli->lli_size_sem);
 }
 
 void ll_update_inode(struct inode *inode, struct lustre_md *md)
@@ -1521,40 +1556,40 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
 
         LASSERT ((lsm != NULL) == ((body->valid & OBD_MD_FLEASIZE) != 0));
         if (lsm != NULL) {
+                cfs_down(&lli->lli_och_sem);
                 if (lli->lli_smd == NULL) {
                         if (lsm->lsm_magic != LOV_MAGIC_V1 &&
-                            lsm->lsm_magic != LOV_MAGIC_V3 &&
-                            lsm->lsm_magic != LOV_MAGIC_JOIN) {
+                            lsm->lsm_magic != LOV_MAGIC_V3) {
                                 dump_lsm(D_ERROR, lsm);
                                 LBUG();
                         }
                         CDEBUG(D_INODE, "adding lsm %p to inode %lu/%u(%p)\n",
                                lsm, inode->i_ino, inode->i_generation, inode);
+                        /* cl_inode_init must go before lli_smd or a race is
+                         * possible where client thinks the file has stripes,
+                         * but lov raid0 is not setup yet and parallel e.g.
+                         * glimpse would try to use uninitialized lov */
                         cl_inode_init(inode, md);
-                        /* ll_inode_size_lock() requires it is only
-                         * called with lli_smd != NULL or lock_lsm == 0
-                         *  or we can race between lock/unlock.
-                         *  bug 9547 */
+                        cfs_spin_lock(&lli->lli_lock);
                         lli->lli_smd = lsm;
+                        cfs_spin_unlock(&lli->lli_lock);
+                        cfs_up(&lli->lli_och_sem);
                         lli->lli_maxbytes = lsm->lsm_maxbytes;
                         if (lli->lli_maxbytes > PAGE_CACHE_MAXBYTES)
                                 lli->lli_maxbytes = PAGE_CACHE_MAXBYTES;
                 } else {
-                        if (lli->lli_smd->lsm_magic == lsm->lsm_magic &&
-                             lli->lli_smd->lsm_stripe_count ==
-                                        lsm->lsm_stripe_count) {
-                                if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
-                                        CERROR("lsm mismatch for inode %ld\n",
-                                                inode->i_ino);
-                                        CERROR("lli_smd:\n");
-                                        dump_lsm(D_ERROR, lli->lli_smd);
-                                        CERROR("lsm:\n");
-                                        dump_lsm(D_ERROR, lsm);
-                                        LBUG();
-                                }
-                        } else {
-                                cl_inode_init(inode, md);
-                                ll_replace_lsm(inode, lsm);
+                        cfs_up(&lli->lli_och_sem);
+                        LASSERT(lli->lli_smd->lsm_magic == lsm->lsm_magic &&
+                                lli->lli_smd->lsm_stripe_count ==
+                                lsm->lsm_stripe_count);
+                        if (lov_stripe_md_cmp(lli->lli_smd, lsm)) {
+                                CERROR("lsm mismatch for inode %ld\n",
+                                       inode->i_ino);
+                                CERROR("lli_smd:\n");
+                                dump_lsm(D_ERROR, lli->lli_smd);
+                                CERROR("lsm:\n");
+                                dump_lsm(D_ERROR, lsm);
+                                LBUG();
                         }
                 }
                 if (lli->lli_smd != lsm)
@@ -1567,33 +1602,34 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
         }
 #ifdef CONFIG_FS_POSIX_ACL
         else if (body->valid & OBD_MD_FLACL) {
-                spin_lock(&lli->lli_lock);
+                cfs_spin_lock(&lli->lli_lock);
                 if (lli->lli_posix_acl)
                         posix_acl_release(lli->lli_posix_acl);
                 lli->lli_posix_acl = md->posix_acl;
-                spin_unlock(&lli->lli_lock);
+                cfs_spin_unlock(&lli->lli_lock);
         }
 #endif
-        inode->i_ino = ll_fid_build_ino(sbi, &body->fid1);
-        inode->i_generation = ll_fid_build_gen(sbi, &body->fid1);
-
-        if (body->valid & OBD_MD_FLATIME &&
-            body->atime > LTIME_S(inode->i_atime))
-                LTIME_S(inode->i_atime) = body->atime;
-
-        /* mtime is always updated with ctime, but can be set in past.
-           As write and utime(2) may happen within 1 second, and utime's
-           mtime has a priority over write's one, so take mtime from mds
-           for the same ctimes. */
-        if (body->valid & OBD_MD_FLCTIME &&
-            body->ctime >= LTIME_S(inode->i_ctime)) {
-                LTIME_S(inode->i_ctime) = body->ctime;
-                if (body->valid & OBD_MD_FLMTIME) {
-                        CDEBUG(D_INODE, "setting ino %lu mtime "
-                               "from %lu to "LPU64"\n", inode->i_ino,
+        inode->i_ino = cl_fid_build_ino(&body->fid1, 0);
+        inode->i_generation = cl_fid_build_gen(&body->fid1);
+
+        if (body->valid & OBD_MD_FLATIME) {
+                if (body->atime > LTIME_S(inode->i_atime))
+                        LTIME_S(inode->i_atime) = body->atime;
+                lli->lli_lvb.lvb_atime = body->atime;
+        }
+        if (body->valid & OBD_MD_FLMTIME) {
+                if (body->mtime > LTIME_S(inode->i_mtime)) {
+                        CDEBUG(D_INODE, "setting ino %lu mtime from %lu "
+                               "to "LPU64"\n", inode->i_ino,
                                LTIME_S(inode->i_mtime), body->mtime);
                         LTIME_S(inode->i_mtime) = body->mtime;
                 }
+                lli->lli_lvb.lvb_mtime = body->mtime;
+        }
+        if (body->valid & OBD_MD_FLCTIME) {
+                if (body->ctime > LTIME_S(inode->i_ctime))
+                        LTIME_S(inode->i_ctime) = body->ctime;
+                lli->lli_lvb.lvb_ctime = body->ctime;
         }
         if (body->valid & OBD_MD_FLMODE)
                 inode->i_mode = (inode->i_mode & S_IFMT)|(body->mode & ~S_IFMT);
@@ -1634,7 +1670,7 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
         LASSERT(fid_seq(&lli->lli_fid) != 0);
 
         if (body->valid & OBD_MD_FLSIZE) {
-                if ((ll_i2mdexp(inode)->exp_connect_flags & OBD_CONNECT_SOM) &&
+                if (exp_connect_som(ll_i2mdexp(inode)) &&
                     S_ISREG(inode->i_mode) && lli->lli_smd) {
                         struct lustre_handle lockh;
                         ldlm_mode_t mode;
@@ -1665,6 +1701,9 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
                         /* Use old size assignment to avoid
                          * deadlock bz14138 & bz14326 */
                         inode->i_size = body->size;
+
+                        CDEBUG(D_VFSTRACE, "inode=%lu, updating i_size %llu\n",
+                               inode->i_ino, (unsigned long long)body->size);
                 }
 
                 if (body->valid & OBD_MD_FLBLOCKS)
@@ -1681,23 +1720,14 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
         }
 }
 
-static struct backing_dev_info ll_backing_dev_info = {
-        .ra_pages       = 0,    /* No readahead */
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,12))
-        .capabilities   = 0,    /* Does contribute to dirty memory */
-#else
-        .memory_backed  = 0,    /* Does contribute to dirty memory */
-#endif
-};
-
 void ll_read_inode2(struct inode *inode, void *opaque)
 {
         struct lustre_md *md = opaque;
         struct ll_inode_info *lli = ll_i2info(inode);
         ENTRY;
 
-        CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n",
-               inode->i_ino, inode->i_generation, inode);
+        CDEBUG(D_VFSTRACE, "VFS Op:inode="DFID"(%p)\n",
+               PFID(&lli->lli_fid), inode);
 
         ll_lli_init(lli);
 
@@ -1715,16 +1745,20 @@ void ll_read_inode2(struct inode *inode, void *opaque)
 
         /* OIDEBUG(inode); */
 
+        /* initializing backing dev info. */
+        inode->i_mapping->backing_dev_info = &s2lsi(inode->i_sb)->lsi_bdi;
+
+
         if (S_ISREG(inode->i_mode)) {
                 struct ll_sb_info *sbi = ll_i2sbi(inode);
                 inode->i_op = &ll_file_inode_operations;
                 inode->i_fop = sbi->ll_fop;
-                inode->i_mapping->a_ops = &ll_aops;
+                inode->i_mapping->a_ops = (struct address_space_operations *)&ll_aops;
                 EXIT;
         } else if (S_ISDIR(inode->i_mode)) {
                 inode->i_op = &ll_dir_inode_operations;
                 inode->i_fop = &ll_dir_operations;
-                inode->i_mapping->a_ops = &ll_dir_aops;
+                inode->i_mapping->a_ops = (struct address_space_operations *)&ll_dir_aops;
                 EXIT;
         } else if (S_ISLNK(inode->i_mode)) {
                 inode->i_op = &ll_fast_symlink_inode_operations;
@@ -1735,9 +1769,6 @@ void ll_read_inode2(struct inode *inode, void *opaque)
                 init_special_inode(inode, inode->i_mode,
                                    kdev_t_to_nr(inode->i_rdev));
 
-                /* initializing backing dev info. */
-                inode->i_mapping->backing_dev_info = &ll_backing_dev_info;
-
                 EXIT;
         }
 }
@@ -1749,10 +1780,23 @@ void ll_delete_inode(struct inode *inode)
         ENTRY;
 
         rc = obd_fid_delete(sbi->ll_md_exp, ll_inode2fid(inode));
-        if (rc) {
+        if (rc)
                 CERROR("fid_delete() failed, rc %d\n", rc);
-        }
+
         truncate_inode_pages(&inode->i_data, 0);
+
+        /* Workaround for LU-118 */
+        if (inode->i_data.nrpages) {
+                TREE_READ_LOCK_IRQ(&inode->i_data);
+                TREE_READ_UNLOCK_IRQ(&inode->i_data);
+                LASSERTF(inode->i_data.nrpages == 0,
+                         "inode=%lu/%u(%p) nrpages=%lu, see "
+                         "http://jira.whamcloud.com/browse/LU-118\n",
+                         inode->i_ino, inode->i_generation, inode,
+                         inode->i_data.nrpages);
+        }
+        /* Workaround end */
+
         clear_inode(inode);
 
         EXIT;
@@ -1767,14 +1811,19 @@ int ll_iocontrol(struct inode *inode, struct file *file,
         ENTRY;
 
         switch(cmd) {
-        case EXT3_IOC_GETFLAGS: {
+        case FSFILT_IOC_GETFLAGS: {
                 struct mdt_body *body;
-                struct obd_capa *oc;
+                struct md_op_data *op_data;
 
-                oc = ll_mdscapa_get(inode);
-                rc = md_getattr(sbi->ll_md_exp, ll_inode2fid(inode), oc,
-                                OBD_MD_FLFLAGS, 0, &req);
-                capa_put(oc);
+                op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL,
+                                             0, 0, LUSTRE_OPC_ANY,
+                                             NULL);
+                if (IS_ERR(op_data))
+                        RETURN(PTR_ERR(op_data));
+
+                op_data->op_valid = OBD_MD_FLFLAGS;
+                rc = md_getattr(sbi->ll_md_exp, op_data, &req);
+                ll_finish_md_op_data(op_data);
                 if (rc) {
                         CERROR("failure %d inode %lu\n", rc, inode->i_ino);
                         RETURN(-abs(rc));
@@ -1788,7 +1837,7 @@ int ll_iocontrol(struct inode *inode, struct file *file,
 
                 RETURN(put_user(flags, (int *)arg));
         }
-        case EXT3_IOC_SETFLAGS: {
+        case FSFILT_IOC_SETFLAGS: {
                 struct lov_stripe_md *lsm = ll_i2info(inode)->lli_smd;
                 struct obd_info oinfo = { { { 0 } } };
                 struct md_op_data *op_data;
@@ -1812,32 +1861,37 @@ int ll_iocontrol(struct inode *inode, struct file *file,
                                 NULL, 0, NULL, 0, &req, NULL);
                 ll_finish_md_op_data(op_data);
                 ptlrpc_req_finished(req);
-                if (rc || lsm == NULL) {
+                if (rc) {
                         OBDO_FREE(oinfo.oi_oa);
                         RETURN(rc);
                 }
 
+                if (lsm == NULL) {
+                        OBDO_FREE(oinfo.oi_oa);
+                        GOTO(update_cache, rc);
+                }
+
                 oinfo.oi_oa->o_id = lsm->lsm_object_id;
-                oinfo.oi_oa->o_gr = lsm->lsm_object_gr;
+                oinfo.oi_oa->o_seq = lsm->lsm_object_seq;
                 oinfo.oi_oa->o_flags = flags;
                 oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS |
                                        OBD_MD_FLGROUP;
                 oinfo.oi_capa = ll_mdscapa_get(inode);
-
                 obdo_from_inode(oinfo.oi_oa, inode,
-                                OBD_MD_FLFID | OBD_MD_FLGENER);
+                                &ll_i2info(inode)->lli_fid, 0);
                 rc = obd_setattr_rqset(sbi->ll_dt_exp, &oinfo, NULL);
                 capa_put(oinfo.oi_capa);
                 OBDO_FREE(oinfo.oi_oa);
                 if (rc) {
                         if (rc != -EPERM && rc != -EACCES)
-                                CERROR("md_setattr_async fails: rc = %d\n", rc);
+                                CERROR("osc_setattr_async fails: rc = %d\n",rc);
                         RETURN(rc);
                 }
 
-                inode->i_flags = ll_ext_to_inode_flags(flags |
-                                                       MDS_BFLAG_EXT_FLAGS);
-                RETURN(0);
+                EXIT;
+update_cache:
+                inode->i_flags = ll_ext_to_inode_flags(flags);
+                return 0;
         }
         default:
                 RETURN(-ENOSYS);
@@ -1850,7 +1904,7 @@ int ll_flush_ctx(struct inode *inode)
 {
         struct ll_sb_info  *sbi = ll_i2sbi(inode);
 
-        CDEBUG(D_SEC, "flush context for user %d\n", current->uid);
+        CDEBUG(D_SEC, "flush context for user %d\n", cfs_curproc_uid());
 
         obd_set_info_async(sbi->ll_md_exp,
                            sizeof(KEY_FLUSH_CTX), KEY_FLUSH_CTX,
@@ -1873,7 +1927,7 @@ void ll_umount_begin(struct super_block *sb)
         struct lustre_sb_info *lsi = s2lsi(sb);
         struct ll_sb_info *sbi = ll_s2sbi(sb);
         struct obd_device *obd;
-        struct obd_ioctl_data ioc_data = { 0 };
+        struct obd_ioctl_data *ioc_data;
         ENTRY;
 
 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
@@ -1897,8 +1951,6 @@ void ll_umount_begin(struct super_block *sb)
                 return;
         }
         obd->obd_force = 1;
-        obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp, sizeof ioc_data,
-                      &ioc_data, NULL);
 
         obd = class_exp2obd(sbi->ll_dt_exp);
         if (obd == NULL) {
@@ -1907,20 +1959,29 @@ void ll_umount_begin(struct super_block *sb)
                 EXIT;
                 return;
         }
-
         obd->obd_force = 1;
-        obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp, sizeof ioc_data,
-                      &ioc_data, NULL);
+
+        OBD_ALLOC_PTR(ioc_data);
+        if (ioc_data) {
+                obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_md_exp,
+                              sizeof ioc_data, ioc_data, NULL);
+
+                obd_iocontrol(IOC_OSC_SET_ACTIVE, sbi->ll_dt_exp,
+                              sizeof ioc_data, ioc_data, NULL);
+
+                OBD_FREE_PTR(ioc_data);
+        }
+
 
         /* Really, we'd like to wait until there are no requests outstanding,
          * and then continue.  For now, we just invalidate the requests,
          * schedule() and sleep one second if needed, and hope.
          */
-        schedule();
+        cfs_schedule();
 #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT
         if (atomic_read(&vfsmnt->mnt_count) > 2) {
-                cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE,
-                                     cfs_time_seconds(1));
+                cfs_schedule_timeout_and_set_state(CFS_TASK_INTERRUPTIBLE,
+                                                   cfs_time_seconds(1));
                 if (atomic_read(&vfsmnt->mnt_count) > 2)
                         LCONSOLE_WARN("Mount still busy with %d refs! You "
                                       "may try to umount it a bit later\n",
@@ -1968,9 +2029,6 @@ int ll_prep_inode(struct inode **inode,
 
         LASSERT(*inode || sb);
         sbi = sb ? ll_s2sbi(sb) : ll_i2sbi(*inode);
-        prune_deathrow(sbi, 1);
-        memset(&md, 0, sizeof(struct lustre_md));
-
         rc = md_get_lustre_md(sbi->ll_md_exp, req, sbi->ll_dt_exp,
                               sbi->ll_md_exp, &md);
         if (rc)
@@ -1987,7 +2045,7 @@ int ll_prep_inode(struct inode **inode,
                  */
                 LASSERT(fid_is_sane(&md.body->fid1));
 
-                *inode = ll_iget(sb, ll_fid_build_ino(sbi, &md.body->fid1),&md);
+                *inode = ll_iget(sb, cl_fid_build_ino(&md.body->fid1, 0), &md);
                 if (*inode == NULL || IS_ERR(*inode)) {
                         if (md.lsm)
                                 obd_free_memmd(sbi->ll_dt_exp, &md.lsm);
@@ -2004,8 +2062,6 @@ int ll_prep_inode(struct inode **inode,
                 }
         }
 
-        rc = obd_checkmd(sbi->ll_dt_exp, sbi->ll_md_exp,
-                         ll_i2info(*inode)->lli_smd);
 out:
         md_free_lustre_md(sbi->ll_md_exp, &md);
         RETURN(rc);
@@ -2032,6 +2088,12 @@ int ll_obd_statfs(struct inode *inode, void *arg)
             !data->ioc_pbuf1 || !data->ioc_pbuf2)
                 GOTO(out_statfs, rc = -EINVAL);
 
+        if (data->ioc_inllen1 != sizeof(__u32) ||
+            data->ioc_inllen2 != sizeof(__u32) ||
+            data->ioc_plen1 != sizeof(struct obd_statfs) ||
+            data->ioc_plen2 != sizeof(struct obd_uuid))
+                GOTO(out_statfs, rc = -EINVAL);
+
         memcpy(&type, data->ioc_inlbuf1, sizeof(__u32));
         if (type == LL_STATFS_MDC)
                 exp = sbi->ll_md_exp;
@@ -2074,7 +2136,7 @@ int ll_process_config(struct lustre_cfg *lcfg)
         rc = class_process_proc_param(PARAM_LLITE, lvars.obd_vars,
                                       lcfg, sb);
         if (rc > 0)
-               rc = 0;
+                rc = 0;
         return(rc);
 }
 
@@ -2111,14 +2173,29 @@ struct md_op_data * ll_prep_md_op_data(struct md_op_data *op_data,
         op_data->op_namelen = namelen;
         op_data->op_mode = mode;
         op_data->op_mod_time = cfs_time_current_sec();
-        op_data->op_fsuid = current->fsuid;
-        op_data->op_fsgid = current->fsgid;
+        op_data->op_fsuid = cfs_curproc_fsuid();
+        op_data->op_fsgid = cfs_curproc_fsgid();
         op_data->op_cap = cfs_curproc_cap_pack();
         op_data->op_bias = MDS_CHECK_SPLIT;
         op_data->op_opc = opc;
         op_data->op_mds = 0;
         op_data->op_data = data;
 
+        /* If the file is being opened after mknod() (normally due to NFS)
+         * try to use the default stripe data from parent directory for
+         * allocating OST objects.  Try to pass the parent FID to MDS. */
+        if (opc == LUSTRE_OPC_CREATE && i1 == i2 && S_ISREG(i2->i_mode) &&
+            ll_i2info(i2)->lli_smd == NULL) {
+                struct ll_inode_info *lli = ll_i2info(i2);
+
+                cfs_spin_lock(&lli->lli_lock);
+                if (likely(lli->lli_smd == NULL &&
+                           !fid_is_zero(&lli->lli_pfid)))
+                        op_data->op_fid1 = lli->lli_pfid;
+                cfs_spin_unlock(&lli->lli_lock);
+                /** We ignore parent's capability temporary. */
+        }
+
         return op_data;
 }
 
@@ -2148,8 +2225,8 @@ int ll_show_options(struct seq_file *seq, struct vfsmount *vfs)
         if (sbi->ll_flags & LL_SBI_USER_XATTR)
                 seq_puts(seq, ",user_xattr");
 
-        if (sbi->ll_flags & LL_SBI_ACL)
-                seq_puts(seq, ",acl");
+        if (sbi->ll_flags & LL_SBI_LAZYSTATFS)
+                seq_puts(seq, ",lazystatfs");
 
         RETURN(0);
 }