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b=18233 fix read+truncate livelock
[fs/lustre-release.git] / lustre / llite / llite_lib.c
index ed63c2b..73170fc 100644 (file)
@@ -26,7 +26,7 @@
  * 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.
  */
 /*
@@ -42,7 +42,6 @@
 
 #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;
 
 extern struct address_space_operations ll_aops;
 extern struct address_space_operations ll_dir_aops;
 
 #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 +81,10 @@ static struct ll_sb_info *ll_init_sbi(void)
         if (!sbi)
                 RETURN(NULL);
 
-        spin_lock_init(&sbi->ll_lock);
-        init_mutex(&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);
@@ -105,18 +104,18 @@ static struct ll_sb_info *ll_init_sbi(void)
         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
 
@@ -124,13 +123,11 @@ 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 */
@@ -147,9 +144,9 @@ 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;
@@ -170,6 +167,7 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
         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;
@@ -199,7 +197,10 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                                   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_SOM;
+                                  OBD_CONNECT_VBR      | OBD_CONNECT_FULL20;
+
+        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)
@@ -252,7 +253,8 @@ 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);
 
@@ -340,7 +342,10 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                                   OBD_CONNECT_SRVLOCK   | OBD_CONNECT_TRUNCLOCK|
                                   OBD_CONNECT_AT | OBD_CONNECT_RMT_CLIENT |
                                   OBD_CONNECT_OSS_CAPA | OBD_CONNECT_VBR|
-                                  OBD_CONNECT_SOM;
+                                  OBD_CONNECT_FULL20;
+
+        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
@@ -389,11 +394,11 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt)
                 GOTO(out_dt, err);
         }
 
-        mutex_down(&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;
-        mutex_up(&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);
@@ -408,7 +413,9 @@ 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? */
@@ -418,10 +425,19 @@ 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);
@@ -563,109 +579,12 @@ 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);
@@ -684,10 +603,7 @@ void client_common_put_super(struct super_block *sb)
 
         cl_sb_fini(sb);
 
-        /* destroy inodes in deathrow */
-        prune_deathrow(sbi, 0);
-
-        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);
@@ -797,17 +713,25 @@ 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;
@@ -844,6 +768,16 @@ static int ll_options(char *options, int *flags)
                         *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);
@@ -862,26 +796,31 @@ 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);
-        sema_init(&lli->lli_trunc_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_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);
 }
 
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+static atomic_t ll_bdi_num = ATOMIC_INIT(0);
+#endif
+
 int ll_fill_super(struct super_block *sb)
 {
         struct lustre_profile *lprof;
@@ -901,7 +840,7 @@ int ll_fill_super(struct super_block *sb)
         /* client additional sb info */
         lsi->lsi_llsbi = sbi = ll_init_sbi();
         if (!sbi) {
-                cfs_module_put();
+                cfs_module_put(THIS_MODULE);
                 RETURN(-ENOMEM);
         }
 
@@ -909,6 +848,18 @@ int ll_fill_super(struct super_block *sb)
         if (err)
                 GOTO(out_free, err);
 
+        err = ll_bdi_init(&lsi->bdi);
+        if (err)
+                GOTO(out_free, err);
+
+#ifdef HAVE_NEW_BACKING_DEV_INFO
+        lsi->bdi.name = "lustre";
+        lsi->bdi.capabilities = BDI_CAP_MAP_COPY;
+        err = bdi_register(&lsi->bdi, NULL, "lustre-%d",
+                           atomic_inc_return(&ll_bdi_num));
+        sb->s_bdi = &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.*/
@@ -923,6 +874,7 @@ int ll_fill_super(struct super_block *sb)
                 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"
@@ -1012,6 +964,9 @@ void ll_put_super(struct super_block *sb)
         if (profilenm)
                 class_del_profile(profilenm);
 
+        if (ll_bdi_wb_cnt(lsi->bdi) > 0)
+                ll_bdi_destroy(&lsi->bdi);
+
         ll_free_sbi(sb);
         lsi->lsi_llsbi = NULL;
 
@@ -1021,7 +976,7 @@ void ll_put_super(struct super_block *sb)
 
         LCONSOLE_WARN("client %s umount complete\n", ll_instance);
 
-        cfs_module_put();
+        cfs_module_put(THIS_MODULE);
 
         EXIT;
 } /* client_put_super */
@@ -1037,11 +992,10 @@ 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;
                 }
         }
@@ -1107,7 +1061,7 @@ 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;
@@ -1115,11 +1069,6 @@ 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
@@ -1223,23 +1172,22 @@ 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;
 }
@@ -1283,34 +1231,24 @@ 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",
@@ -1332,7 +1270,7 @@ int ll_setattr_raw(struct inode *inode, struct iattr *attr)
         UNLOCK_INODE_MUTEX(inode);
         if (ia_valid & ATTR_SIZE)
                 UP_WRITE_I_ALLOC_SEM(inode);
-        down(&lli->lli_trunc_sem);
+        cfs_down_write(&lli->lli_trunc_sem);
         LOCK_INODE_MUTEX(inode);
         if (ia_valid & ATTR_SIZE)
                 DOWN_WRITE_I_ALLOC_SEM(inode);
@@ -1340,7 +1278,8 @@ int ll_setattr_raw(struct inode *inode, struct iattr *attr)
         memcpy(&op_data->op_attr, attr, sizeof(*attr));
 
         /* Open epoch for truncate. */
-        if (exp_connect_som(ll_i2mdexp(inode)) && (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);
@@ -1354,12 +1293,17 @@ int ll_setattr_raw(struct inode *inode, struct iattr *attr)
         }
 
         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) {
@@ -1367,7 +1311,7 @@ out:
                         rc1 = ll_setattr_done_writing(inode, op_data, mod);
                 ll_finish_md_op_data(op_data);
         }
-        up(&lli->lli_trunc_sem);
+        cfs_up_write(&lli->lli_trunc_sem);
         return rc ? rc : rc1;
 }
 
@@ -1454,10 +1398,10 @@ 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;
 
@@ -1491,7 +1435,7 @@ 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;
@@ -1514,7 +1458,7 @@ 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);
+        cfs_up(&lli->lli_size_sem);
 }
 
 void ll_update_inode(struct inode *inode, struct lustre_md *md)
@@ -1526,6 +1470,7 @@ 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) {
@@ -1534,16 +1479,18 @@ void ll_update_inode(struct inode *inode, struct lustre_md *md)
                         }
                         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 */
                         lli->lli_smd = lsm;
+                        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 {
+                        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);
@@ -1567,33 +1514,34 @@ 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 = cl_fid_build_ino(&body->fid1);
         inode->i_generation = cl_fid_build_gen(&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,
+        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);
@@ -1665,6 +1613,9 @@ 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)
@@ -1681,15 +1632,6 @@ 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;
@@ -1715,6 +1657,10 @@ 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)->bdi);
+
+
         if (S_ISREG(inode->i_mode)) {
                 struct ll_sb_info *sbi = ll_i2sbi(inode);
                 inode->i_op = &ll_file_inode_operations;
@@ -1735,9 +1681,6 @@ 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;
         }
 }
@@ -1769,12 +1712,17 @@ int ll_iocontrol(struct inode *inode, struct file *file,
         switch(cmd) {
         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 (op_data == NULL)
+                        RETURN(-ENOMEM);
+
+                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));
@@ -1823,14 +1771,13 @@ int ll_iocontrol(struct inode *inode, struct file *file,
                 }
 
                 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);
@@ -1842,8 +1789,7 @@ int ll_iocontrol(struct inode *inode, struct file *file,
 
                 EXIT;
 update_cache:
-                inode->i_flags = ll_ext_to_inode_flags(flags |
-                                                       MDS_BFLAG_EXT_FLAGS);
+                inode->i_flags = ll_ext_to_inode_flags(flags);
                 return 0;
         }
         default:
@@ -1857,7 +1803,7 @@ 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,
@@ -1880,7 +1826,7 @@ 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
@@ -1904,8 +1850,6 @@ 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) {
@@ -1914,20 +1858,29 @@ 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",
@@ -1975,7 +1928,6 @@ 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,
@@ -2037,6 +1989,12 @@ 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;
@@ -2116,8 +2074,8 @@ 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;
@@ -2153,9 +2111,6 @@ 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");