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LU-8560 libcfs: handle PAGE_CACHE_* removal in newer kernels
[fs/lustre-release.git] / lustre / quota / qsd_reint.c
index ad2894f..d9a5537 100644 (file)
  * GPL HEADER END
  */
 /*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2014, Intel Corporation.
  * Use is subject to license terms.
  *
  * Author: Johann Lombardi <johann.lombardi@intel.com>
  * Author: Niu    Yawei    <yawei.niu@intel.com>
  */
 
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
 #define DEBUG_SUBSYSTEM S_LQUOTA
 
+#include <linux/kthread.h>
+#include <lustre_swab.h>
 #include "qsd_internal.h"
 
 /*
@@ -98,7 +96,7 @@ out:
 static int qsd_reint_entries(const struct lu_env *env,
                             struct qsd_qtype_info *qqi,
                             struct idx_info *ii, bool global,
-                            cfs_page_t **pages,
+                            struct page **pages,
                             unsigned int npages, bool need_swab)
 {
        struct qsd_thread_info  *qti = qsd_info(env);
@@ -123,7 +121,7 @@ static int qsd_reint_entries(const struct lu_env *env,
        size = ii->ii_recsize + ii->ii_keysize;
 
        for (i = 0; i < npages; i++) {
-               union lu_page   *lip = cfs_kmap(pages[i]);
+               union lu_page   *lip = kmap(pages[i]);
 
                for (j = 0; j < LU_PAGE_COUNT; j++) {
                        if (need_swab)
@@ -173,7 +171,7 @@ static int qsd_reint_entries(const struct lu_env *env,
                        lip++;
                }
 out:
-               cfs_kunmap(pages[i]);
+               kunmap(pages[i]);
                if (rc)
                        break;
        }
@@ -187,7 +185,7 @@ static int qsd_reint_index(const struct lu_env *env, struct qsd_qtype_info *qqi,
        struct qsd_instance     *qsd = qqi->qqi_qsd;
        struct idx_info         *ii = &qti->qti_ii;
        struct lu_fid           *fid;
-       cfs_page_t              **pages = NULL;
+       struct page             **pages = NULL;
        unsigned int             npages, pg_cnt;
        __u64                    start_hash = 0, ver = 0;
        bool                     need_swab = false;
@@ -198,14 +196,14 @@ static int qsd_reint_index(const struct lu_env *env, struct qsd_qtype_info *qqi,
 
        /* let's do a 1MB bulk */
        npages = min_t(unsigned int, OFD_MAX_BRW_SIZE, 1 << 20);
-       npages /= CFS_PAGE_SIZE;
+       npages /= PAGE_SIZE;
 
        /* allocate pages for bulk index read */
        OBD_ALLOC(pages, npages * sizeof(*pages));
        if (pages == NULL)
                GOTO(out, rc = -ENOMEM);
        for (i = 0; i < npages; i++) {
-               pages[i] = cfs_alloc_page(CFS_ALLOC_STD);
+               pages[i] = alloc_page(GFP_NOFS);
                if (pages[i] == NULL)
                        GOTO(out, rc = -ENOMEM);
        }
@@ -258,7 +256,7 @@ repeat:
                ver = ii->ii_version;
 
        pg_cnt = (ii->ii_count + (LU_PAGE_COUNT) - 1);
-       pg_cnt >>= CFS_PAGE_SHIFT - LU_PAGE_SHIFT;
+       pg_cnt >>= PAGE_SHIFT - LU_PAGE_SHIFT;
 
        if (pg_cnt > npages) {
                CERROR("%s: master returned more pages than expected, %u > %u"
@@ -278,7 +276,7 @@ out:
        if (pages != NULL) {
                for (i = 0; i < npages; i++)
                        if (pages[i] != NULL)
-                               cfs_free_page(pages[i]);
+                               __free_page(pages[i]);
                OBD_FREE(pages, npages * sizeof(*pages));
        }
 
@@ -309,7 +307,7 @@ static int qsd_reconciliation(const struct lu_env *env,
        LASSERT(qqi->qqi_glb_obj != NULL);
        iops = &qqi->qqi_glb_obj->do_index_ops->dio_it;
 
-       it = iops->init(env, qqi->qqi_glb_obj, 0, BYPASS_CAPA);
+       it = iops->init(env, qqi->qqi_glb_obj, 0);
        if (IS_ERR(it)) {
                CWARN("%s: Initialize it for "DFID" failed. %ld\n",
                      qsd->qsd_svname, PFID(&qqi->qqi_fid), PTR_ERR(it));
@@ -417,8 +415,6 @@ static int qsd_reint_main(void *args)
        int                      rc;
        ENTRY;
 
-       cfs_daemonize("qsd_reint");
-
        CDEBUG(D_QUOTA, "%s: Starting reintegration thread for "DFID"\n",
               qsd->qsd_svname, PFID(&qqi->qqi_fid));
 
@@ -426,7 +422,7 @@ static int qsd_reint_main(void *args)
        lu_ref_add(&qqi->qqi_reference, "reint_thread", thread);
 
        thread_set_flags(thread, SVC_RUNNING);
-       cfs_waitq_signal(&thread->t_ctl_waitq);
+       wake_up(&thread->t_ctl_waitq);
 
        OBD_ALLOC_PTR(env);
        if (env == NULL)
@@ -503,7 +499,7 @@ static int qsd_reint_main(void *args)
        if (qqi->qqi_slv_ver != qti->qti_slv_ver) {
                rc = qsd_reint_index(env, qqi, false);
                if (rc) {
-                       CWARN("%s: Reint slave for "DFID" failed. %d\n",
+                       CWARN("%s: reintegration for "DFID" failed with %d\n",
                              qsd->qsd_svname, PFID(&qqi->qqi_slv_fid), rc);
                        GOTO(out_lock, rc);
                }
@@ -511,7 +507,7 @@ static int qsd_reint_main(void *args)
                qsd_bump_version(qqi, qqi->qqi_slv_ver, false);
        }
 
-       /* wait for the connection to master established */
+       /* wait for the qsd instance started (target recovery done) */
        l_wait_event(thread->t_ctl_waitq,
                     qsd_started(qsd) || !thread_is_running(thread), &lwi);
 
@@ -521,8 +517,8 @@ static int qsd_reint_main(void *args)
        /* Step 4: start reconciliation for each enforced ID */
        rc = qsd_reconciliation(env, qqi);
        if (rc)
-               CWARN("%s: reconciliation failed. "DFID", %d\n",
-                     qsd->qsd_svname, PFID(&qti->qti_fid), rc);
+               CWARN("%s: reconciliation for "DFID" failed with %d\n",
+                     qsd->qsd_svname, PFID(&qqi->qqi_slv_fid), rc);
 
        EXIT;
 out_lock:
@@ -536,11 +532,12 @@ out:
        qqi->qqi_reint = 0;
        write_unlock(&qsd->qsd_lock);
 
-       qqi_putref(qqi);
+       thread_set_flags(thread, SVC_STOPPED);
+       wake_up(&thread->t_ctl_waitq);
+
        lu_ref_del(&qqi->qqi_reference, "reint_thread", thread);
+       qqi_putref(qqi);
 
-       thread_set_flags(thread, SVC_STOPPED);
-       cfs_waitq_signal(&thread->t_ctl_waitq);
        return rc;
 }
 
@@ -551,20 +548,20 @@ void qsd_stop_reint_thread(struct qsd_qtype_info *qqi)
 
        if (!thread_is_stopped(thread)) {
                thread_set_flags(thread, SVC_STOPPING);
-               cfs_waitq_signal(&thread->t_ctl_waitq);
+               wake_up(&thread->t_ctl_waitq);
 
                l_wait_event(thread->t_ctl_waitq,
                             thread_is_stopped(thread), &lwi);
        }
 }
 
-static int qsd_entry_iter_cb(cfs_hash_t *hs, cfs_hash_bd_t *bd,
-                            cfs_hlist_node_t *hnode, void *data)
+static int qsd_entry_iter_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+                            struct hlist_node *hnode, void *data)
 {
        struct lquota_entry     *lqe;
        int                     *pending = (int *)data;
 
-       lqe = cfs_hlist_entry(hnode, struct lquota_entry, lqe_hash);
+       lqe = hlist_entry(hnode, struct lquota_entry, lqe_hash);
        LASSERT(atomic_read(&lqe->lqe_ref) > 0);
 
        lqe_read_lock(lqe);
@@ -585,9 +582,9 @@ static bool qsd_pending_updates(struct qsd_qtype_info *qqi)
 
        /* any pending quota adjust? */
        spin_lock(&qsd->qsd_adjust_lock);
-       cfs_list_for_each_entry_safe(lqe, n, &qsd->qsd_adjust_list, lqe_link) {
+       list_for_each_entry_safe(lqe, n, &qsd->qsd_adjust_list, lqe_link) {
                if (lqe2qqi(lqe) == qqi) {
-                       cfs_list_del_init(&lqe->lqe_link);
+                       list_del_init(&lqe->lqe_link);
                        lqe_putref(lqe);
                }
        }
@@ -595,7 +592,7 @@ static bool qsd_pending_updates(struct qsd_qtype_info *qqi)
 
        /* any pending updates? */
        read_lock(&qsd->qsd_lock);
-       cfs_list_for_each_entry(upd, &qsd->qsd_upd_list, qur_link) {
+       list_for_each_entry(upd, &qsd->qsd_upd_list, qur_link) {
                if (upd->qur_qqi == qqi) {
                        read_unlock(&qsd->qsd_lock);
                        CDEBUG(D_QUOTA, "%s: pending %s updates for type:%d.\n",
@@ -628,15 +625,17 @@ int qsd_start_reint_thread(struct qsd_qtype_info *qqi)
 {
        struct ptlrpc_thread    *thread = &qqi->qqi_reint_thread;
        struct qsd_instance     *qsd = qqi->qqi_qsd;
-       struct l_wait_info      lwi = { 0 };
-       int                     rc;
+       struct l_wait_info       lwi = { 0 };
+       struct task_struct      *task;
+       int                      rc;
+       char                    *name;
        ENTRY;
 
        /* don't bother to do reintegration when quota isn't enabled */
-       if (!qsd_type_enabled(qqi->qqi_qsd, qqi->qqi_qtype))
+       if (!qsd_type_enabled(qsd, qqi->qqi_qtype))
                RETURN(0);
 
-       if (qqi->qqi_qsd->qsd_acct_failed)
+       if (qsd->qsd_acct_failed)
                /* no space accounting support, can't enable enforcement */
                RETURN(0);
 
@@ -662,8 +661,18 @@ int qsd_start_reint_thread(struct qsd_qtype_info *qqi)
                RETURN(0);
        }
 
-       rc = cfs_create_thread(qsd_reint_main, (void *)qqi, 0);
-       if (rc < 0) {
+       OBD_ALLOC(name, MTI_NAME_MAXLEN);
+       if (name == NULL)
+               RETURN(-ENOMEM);
+
+       snprintf(name, MTI_NAME_MAXLEN, "qsd_reint_%d.%s",
+                qqi->qqi_qtype, qsd->qsd_svname);
+
+       task = kthread_run(qsd_reint_main, qqi, name);
+       OBD_FREE(name, MTI_NAME_MAXLEN);
+
+       if (IS_ERR(task)) {
+               rc = PTR_ERR(task);
                thread_set_flags(thread, SVC_STOPPED);
                write_lock(&qsd->qsd_lock);
                qqi->qqi_reint = 0;