-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Lustre Light block IO
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * Copyright (c) 2011, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * lustre/liblustre/rw.c
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Lustre Light block IO
*/
#define DEBUG_SUBSYSTEM S_LLITE
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
#include <stdlib.h>
#include <string.h>
-#include <assert.h>
#include <time.h>
+#include <sys/stat.h>
#include <sys/types.h>
-#include <sys/queue.h>
-#include <fcntl.h>
-
-#include <sysio.h>
-#include <fs.h>
-#include <mount.h>
-#include <inode.h>
-#include <file.h>
-
-#undef LIST_HEAD
-
+#include <sys/uio.h>
+#include <libcfs/libcfs.h>
+#include <lustre/lustre_idl.h>
+#include <liblustre.h>
+#include <cl_object.h>
+#include <lclient.h>
+#include <lustre_dlm.h>
+#include <obd.h>
+#include <obd_class.h>
+#include <obd_support.h>
#include "llite_lib.h"
-static int llu_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct lov_stripe_md *lsm = lli->lli_smd;
- struct obd_export *exp = llu_i2obdexp(inode);
- struct {
- char name[16];
- struct ldlm_lock *lock;
- struct lov_stripe_md *lsm;
- } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
- __u32 stripe, vallen = sizeof(stripe);
- int rc;
- ENTRY;
-
- if (lsm->lsm_stripe_count == 1)
- RETURN(0);
-
- /* get our offset in the lov */
- rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
- if (rc != 0) {
- CERROR("obd_get_info: rc = %d\n", rc);
- LBUG();
- }
- LASSERT(stripe < lsm->lsm_stripe_count);
- RETURN(stripe);
-}
-
-static int llu_extent_lock_callback(struct ldlm_lock *lock,
- struct ldlm_lock_desc *new, void *data,
- int flag)
-{
- struct lustre_handle lockh = { 0 };
- int rc;
- ENTRY;
-
- if ((unsigned long)data > 0 && (unsigned long)data < 0x1000) {
- LDLM_ERROR(lock, "cancelling lock with bad data %p", data);
- LBUG();
- }
-
- switch (flag) {
- case LDLM_CB_BLOCKING:
- ldlm_lock2handle(lock, &lockh);
- rc = ldlm_cli_cancel(&lockh);
- if (rc != ELDLM_OK)
- CERROR("ldlm_cli_cancel failed: %d\n", rc);
- break;
- case LDLM_CB_CANCELING: {
- struct inode *inode;
- struct llu_inode_info *lli;
- struct lov_stripe_md *lsm;
- __u32 stripe;
- __u64 kms;
-
- /* This lock wasn't granted, don't try to evict pages */
- if (lock->l_req_mode != lock->l_granted_mode)
- RETURN(0);
-
- inode = llu_inode_from_lock(lock);
- if (!inode)
- RETURN(0);
- lli= llu_i2info(inode);
- if (!lli)
- goto iput;
- if (!lli->lli_smd)
- goto iput;
- lsm = lli->lli_smd;
-
- stripe = llu_lock_to_stripe_offset(inode, lock);
- kms = ldlm_extent_shift_kms(lock,
- lsm->lsm_oinfo[stripe].loi_kms);
- if (lsm->lsm_oinfo[stripe].loi_kms != kms)
- LDLM_DEBUG(lock, "updating kms from "LPU64" to "LPU64,
- lsm->lsm_oinfo[stripe].loi_kms, kms);
- lsm->lsm_oinfo[stripe].loi_kms = kms;
-iput:
- I_RELE(inode);
- break;
- }
- default:
- LBUG();
- }
-
- RETURN(0);
-}
-
-static int llu_glimpse_callback(struct ldlm_lock *lock, void *reqp)
+int llu_merge_lvb(const struct lu_env *env, struct inode *inode)
{
- struct ptlrpc_request *req = reqp;
- struct inode *inode = llu_inode_from_lock(lock);
- struct llu_inode_info *lli;
- struct ost_lvb *lvb;
- int rc, size = sizeof(*lvb), stripe = 0;
- ENTRY;
-
- if (inode == NULL)
- GOTO(out, rc = -ELDLM_NO_LOCK_DATA);
- lli = llu_i2info(inode);
- if (lli == NULL)
- GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
- if (lli->lli_smd == NULL)
- GOTO(iput, rc = -ELDLM_NO_LOCK_DATA);
-
- /* First, find out which stripe index this lock corresponds to. */
- if (lli->lli_smd->lsm_stripe_count > 1)
- stripe = llu_lock_to_stripe_offset(inode, lock);
-
- rc = lustre_pack_reply(req, 1, &size, NULL);
- if (rc) {
- CERROR("lustre_pack_reply: %d\n", rc);
- GOTO(iput, rc);
- }
-
- lvb = lustre_msg_buf(req->rq_repmsg, 0, sizeof(*lvb));
- lvb->lvb_size = lli->lli_smd->lsm_oinfo[stripe].loi_kms;
-
- LDLM_DEBUG(lock, "i_size: %llu -> stripe number %u -> kms "LPU64,
- lli->lli_st_size, stripe, lvb->lvb_size);
- iput:
- I_RELE(inode);
- out:
- /* These errors are normal races, so we don't want to fill the console
- * with messages by calling ptlrpc_error() */
- if (rc == -ELDLM_NO_LOCK_DATA)
- lustre_pack_reply(req, 0, NULL, NULL);
-
- req->rq_status = rc;
- return rc;
-}
-
-__u64 lov_merge_size(struct lov_stripe_md *lsm, int kms);
-__u64 lov_merge_mtime(struct lov_stripe_md *lsm, __u64 current_time);
-
-/* NB: lov_merge_size will prefer locally cached writes if they extend the
- * file (because it prefers KMS over RSS when larger) */
-int llu_glimpse_size(struct inode *inode, struct ost_lvb *lvb)
-{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
- struct lustre_handle lockh = { 0 };
- int rc, flags = LDLM_FL_HAS_INTENT;
- ENTRY;
-
- CDEBUG(D_DLMTRACE, "Glimpsing inode %lu\n", lli->lli_st_ino);
-
- rc = obd_enqueue(sbi->ll_osc_exp, lli->lli_smd, LDLM_EXTENT, &policy,
- LCK_PR, &flags, llu_extent_lock_callback,
- ldlm_completion_ast, llu_glimpse_callback, inode,
- sizeof(*lvb), lustre_swab_ost_lvb, &lockh);
- if (rc > 0)
- RETURN(-EIO);
-
- lvb->lvb_size = lov_merge_size(lli->lli_smd, 0);
- //inode->i_mtime = lov_merge_mtime(lli->lli_smd, inode->i_mtime);
-
- CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64"\n", lvb->lvb_size);
-
- obd_cancel(sbi->ll_osc_exp, lli->lli_smd, LCK_PR, &lockh);
-
- RETURN(rc);
-}
-
-int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
- struct lov_stripe_md *lsm, int mode,
- ldlm_policy_data_t *policy, struct lustre_handle *lockh,
- int ast_flags)
-{
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- struct llu_inode_info *lli = llu_i2info(inode);
- int rc;
- ENTRY;
-
- LASSERT(lockh->cookie == 0);
-
- /* XXX phil: can we do this? won't it screw the file size up? */
- if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
- (sbi->ll_flags & LL_SBI_NOLCK))
- RETURN(0);
-
- CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
- lli->lli_st_ino, policy->l_extent.start, policy->l_extent.end);
-
- rc = obd_enqueue(sbi->ll_osc_exp, lsm, LDLM_EXTENT, policy, mode,
- &ast_flags, llu_extent_lock_callback,
- ldlm_completion_ast, llu_glimpse_callback, inode,
- sizeof(struct ost_lvb), lustre_swab_ost_lvb, lockh);
- if (rc > 0)
- rc = -EIO;
-
- if (policy->l_extent.start == 0 &&
- policy->l_extent.end == OBD_OBJECT_EOF)
- lli->lli_st_size = lov_merge_size(lsm, 1);
-
- //inode->i_mtime = lov_merge_mtime(lsm, inode->i_mtime);
-
- RETURN(rc);
-}
-
-#if 0
-int llu_extent_lock_no_validate(struct ll_file_data *fd,
- struct inode *inode,
- struct lov_stripe_md *lsm,
- int mode,
- struct ldlm_extent *extent,
- struct lustre_handle *lockh,
- int ast_flags)
-{
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- struct llu_inode_info *lli = llu_i2info(inode);
- int rc;
- ENTRY;
-
- LASSERT(lockh->cookie == 0);
-
- /* XXX phil: can we do this? won't it screw the file size up? */
- if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
- (sbi->ll_flags & LL_SBI_NOLCK))
- RETURN(0);
-
- CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
- lli->lli_st_ino, extent->start, extent->end);
-
- rc = obd_enqueue(sbi->ll_osc_exp, lsm, NULL, LDLM_EXTENT, extent,
- sizeof(extent), mode, &ast_flags,
- llu_extent_lock_callback, inode, lockh);
-
- RETURN(rc);
+ struct llu_inode_info *lli = llu_i2info(inode);
+ struct cl_object *obj = lli->lli_clob;
+ struct intnl_stat *st = llu_i2stat(inode);
+ struct cl_attr *attr = ccc_env_thread_attr(env);
+ struct ost_lvb lvb;
+ int rc;
+ ENTRY;
+
+ /* merge timestamps the most recently obtained from mds with
+ timestamps obtained from osts */
+ LTIME_S(inode->i_atime) = lli->lli_lvb.lvb_atime;
+ LTIME_S(inode->i_mtime) = lli->lli_lvb.lvb_mtime;
+ LTIME_S(inode->i_ctime) = lli->lli_lvb.lvb_ctime;
+
+ inode_init_lvb(inode, &lvb);
+
+ cl_object_attr_lock(obj);
+ rc = cl_object_attr_get(env, obj, attr);
+ cl_object_attr_unlock(obj);
+ if (rc == 0) {
+ if (lvb.lvb_atime < attr->cat_atime)
+ lvb.lvb_atime = attr->cat_atime;
+ if (lvb.lvb_ctime < attr->cat_ctime)
+ lvb.lvb_ctime = attr->cat_ctime;
+ if (lvb.lvb_mtime < attr->cat_mtime)
+ lvb.lvb_mtime = attr->cat_mtime;
+
+ st->st_size = lvb.lvb_size;
+ st->st_blocks = lvb.lvb_blocks;
+ st->st_mtime = lvb.lvb_mtime;
+ st->st_atime = lvb.lvb_atime;
+ st->st_ctime = lvb.lvb_ctime;
+ }
+
+ RETURN(rc);
}
-/*
- * this grabs a lock and manually implements behaviour that makes it look like
- * the OST is returning the file size with each lock acquisition.
- */
-int llu_extent_lock(struct ll_file_data *fd, struct inode *inode,
- struct lov_stripe_md *lsm, int mode,
- struct ldlm_extent *extent, struct lustre_handle *lockh,
- int nonblock)
+static
+ssize_t llu_file_prwv(const struct iovec *iovec, int iovlen,
+ _SYSIO_OFF_T pos, ssize_t len,
+ void *private)
{
+ struct llu_io_session *session = (struct llu_io_session *) private;
+ struct inode *inode = session->lis_inode;
struct llu_inode_info *lli = llu_i2info(inode);
- struct obd_export *exp = llu_i2obdexp(inode);
- struct ldlm_extent size_lock;
- struct lustre_handle match_lockh = {0};
- int flags, rc, matched;
- int astflags = nonblock ? LDLM_FL_BLOCK_NOWAIT : 0;
+ int err;
+ struct lu_env *env;
+ struct cl_io *io;
+ struct slp_io *sio;
+ int refcheck;
ENTRY;
- rc = llu_extent_lock_no_validate(fd, inode, lsm, mode, extent,
- lockh, astflags);
- if (rc != ELDLM_OK)
- RETURN(rc);
-
- if (test_bit(LLI_F_HAVE_OST_SIZE_LOCK, &lli->lli_flags))
- RETURN(0);
-
- rc = llu_inode_getattr(inode, lsm);
- if (rc) {
- llu_extent_unlock(fd, inode, lsm, mode, lockh);
- RETURN(rc);
- }
-
- size_lock.start = lli->lli_st_size;
- size_lock.end = OBD_OBJECT_EOF;
-
- /* XXX I bet we should be checking the lock ignore flags.. */
- /* FIXME use LDLM_FL_TEST_LOCK instead */
- flags = LDLM_FL_CBPENDING | LDLM_FL_BLOCK_GRANTED;
- matched = obd_match(exp, lsm, LDLM_EXTENT, &size_lock,
- sizeof(size_lock), LCK_PR, &flags, inode,
- &match_lockh);
-
- /* hey, alright, we hold a size lock that covers the size we
- * just found, its not going to change for a while.. */
- if (matched == 1) {
- set_bit(LLI_F_HAVE_OST_SIZE_LOCK, &lli->lli_flags);
- obd_cancel(exp, lsm, LCK_PR, &match_lockh);
- }
-
- RETURN(0);
-}
-#endif
-
-int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode,
- struct lov_stripe_md *lsm, int mode,
- struct lustre_handle *lockh)
-{
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- int rc;
- ENTRY;
+ /* in a large iov read/write we'll be repeatedly called.
+ * so give a chance to answer cancel ast here
+ */
+ liblustre_wait_event(0);
- /* XXX phil: can we do this? won't it screw the file size up? */
- if ((fd && (fd->fd_flags & LL_FILE_IGNORE_LOCK)) ||
- (sbi->ll_flags & LL_SBI_NOLCK))
+ if (len == 0 || iovlen == 0)
RETURN(0);
- rc = obd_cancel(sbi->ll_osc_exp, lsm, mode, lockh);
-
- RETURN(rc);
-}
-
-#define LLAP_MAGIC 12346789
-
-struct ll_async_page {
- int llap_magic;
- void *llap_cookie;
- int llap_queued;
- struct page *llap_page;
- struct inode *llap_inode;
-};
-
-static struct ll_async_page *llap_from_cookie(void *cookie)
-{
- struct ll_async_page *llap = cookie;
- if (llap->llap_magic != LLAP_MAGIC)
- return ERR_PTR(-EINVAL);
- return llap;
-};
-
-static void llu_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
-{
- struct ll_async_page *llap;
- struct inode *inode;
- struct lov_stripe_md *lsm;
- obd_flag valid_flags;
- ENTRY;
-
- llap = llap_from_cookie(data);
- if (IS_ERR(llap)) {
- EXIT;
- return;
+ if (pos + len > lli->lli_maxbytes)
+ RETURN(-ERANGE);
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ /* Do NOT call "ccc_env_thread_io()" again to prevent reinitializing */
+ io = &ccc_env_info(env)->cti_io;
+ if (cl_io_rw_init(env, io, session->lis_cmd == OBD_BRW_WRITE?CIT_WRITE:
+ CIT_READ,
+ pos, len) == 0) {
+ struct ccc_io *cio;
+ sio = slp_env_io(env);
+ cio = ccc_env_io(env);
+ /* XXX this is not right: cio->cui_iov can be modified. */
+ cio->cui_iov = (struct iovec *)iovec;
+ cio->cui_nrsegs = iovlen;
+ cio->cui_tot_nrsegs = iovlen;
+ sio->sio_session = session;
+ err = cl_io_loop(env, io);
+ } else {
+ /* XXX WTF? */
+ LBUG();
}
+ cl_io_fini(env, io);
+ cl_env_put(env, &refcheck);
- inode = llap->llap_inode;
- lsm = llu_i2info(inode)->lli_smd;
-
- oa->o_id = lsm->lsm_object_id;
- oa->o_valid = OBD_MD_FLID;
- valid_flags = OBD_MD_FLTYPE | OBD_MD_FLATIME;
- if (cmd == OBD_BRW_WRITE)
- valid_flags |= OBD_MD_FLMTIME | OBD_MD_FLCTIME;
+ if (err < 0)
+ RETURN(err);
- obdo_from_inode(oa, inode, valid_flags);
- EXIT;
+ RETURN(len);
}
-/* called for each page in a completed rpc.*/
-static void llu_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
+static
+struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
{
- struct ll_async_page *llap;
- struct page *page;
-
- llap = llap_from_cookie(data);
- if (IS_ERR(llap)) {
- EXIT;
- return;
- }
+ struct llu_io_session *session;
- llap->llap_queued = 0;
- page = llap->llap_page;
+ OBD_ALLOC_PTR(session);
+ if (!session)
+ return NULL;
- if (rc != 0) {
- if (cmd == OBD_BRW_WRITE)
- CERROR("writeback error on page %p index %ld: %d\n",
- page, page->index, rc);
- }
- EXIT;
+ I_REF(ino);
+ session->lis_inode = ino;
+ session->lis_cmd = cmd;
+ return session;
}
-static struct obd_async_page_ops llu_async_page_ops = {
- .ap_make_ready = NULL,
- .ap_refresh_count = NULL,
- .ap_fill_obdo = llu_ap_fill_obdo,
- .ap_completion = llu_ap_completion,
-};
-
-static
-struct llu_sysio_cookie* get_sysio_cookie(struct inode *inode, int maxpages)
+static void put_io_session(struct llu_io_session *session)
{
- struct llu_sysio_cookie *cookie;
- int rc;
-
- OBD_ALLOC(cookie, LLU_SYSIO_COOKIE_SIZE(maxpages));
- if (cookie == NULL)
- goto out;
-
- I_REF(inode);
- cookie->lsc_inode = inode;
- cookie->lsc_maxpages = maxpages;
- cookie->lsc_llap = (struct ll_async_page *)(cookie + 1);
- cookie->lsc_pages = (struct page *) (cookie->lsc_llap + maxpages);
-
- rc = oig_init(&cookie->lsc_oig);
- if (rc) {
- OBD_FREE(cookie, LLU_SYSIO_COOKIE_SIZE(maxpages));
- cookie = NULL;
- }
-
-out:
- return cookie;
+ I_RELE(session->lis_inode);
+ OBD_FREE_PTR(session);
}
-static
-void put_sysio_cookie(struct llu_sysio_cookie *cookie)
+static int llu_file_rwx(struct inode *ino,
+ struct ioctx *ioctx,
+ int read)
{
- struct lov_stripe_md *lsm = llu_i2info(cookie->lsc_inode)->lli_smd;
- struct obd_export *exp = llu_i2obdexp(cookie->lsc_inode);
- struct ll_async_page *llap = cookie->lsc_llap;
- int i;
-
- for (i = 0; i< cookie->lsc_maxpages; i++) {
- if (llap[i].llap_cookie)
- obd_teardown_async_page(exp, lsm, NULL,
- llap[i].llap_cookie);
- }
+ struct llu_io_session *session;
+ ssize_t cc;
+ int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
+ ENTRY;
- I_RELE(cookie->lsc_inode);
+ LASSERT(ioctx->ioctx_iovlen > 0);
- oig_release(cookie->lsc_oig);
- OBD_FREE(cookie, LLU_SYSIO_COOKIE_SIZE(cookie->lsc_maxpages));
-}
+ liblustre_wait_event(0);
-static
-int llu_prep_async_io(struct llu_sysio_cookie *cookie, int cmd,
- char *buf, loff_t pos, size_t count)
-{
- struct llu_inode_info *lli = llu_i2info(cookie->lsc_inode);
- struct lov_stripe_md *lsm = lli->lli_smd;
- struct obd_export *exp = llu_i2obdexp(cookie->lsc_inode);
- struct page *pages = cookie->lsc_pages;
- struct ll_async_page *llap = cookie->lsc_llap;
- int i, rc, npages = 0;
- ENTRY;
+ if (ioctx->ioctx_xtvlen == 0)
+ RETURN(0);
- if (!exp)
- RETURN(-EINVAL);
-
- /* prepare the pages array */
- do {
- unsigned long index, offset, bytes;
-
- offset = (pos & ~PAGE_CACHE_MASK);
- index = pos >> PAGE_CACHE_SHIFT;
- bytes = PAGE_CACHE_SIZE - offset;
- if (bytes > count)
- bytes = count;
-
- /* prevent read beyond file range */
- if ((cmd == OBD_BRW_READ) &&
- (pos + bytes) >= lli->lli_st_size) {
- if (pos >= lli->lli_st_size)
- break;
- bytes = lli->lli_st_size - pos;
- }
-
- /* prepare page for this index */
- pages[npages].index = index;
- pages[npages].addr = buf - offset;
-
- pages[npages]._offset = offset;
- pages[npages]._count = bytes;
-
- npages++;
- count -= bytes;
- pos += bytes;
- buf += bytes;
-
- cookie->lsc_rwcount += bytes;
- } while (count);
-
- cookie->lsc_npages = npages;
-
- for (i = 0; i < npages; i++) {
- llap[i].llap_magic = LLAP_MAGIC;
- rc = obd_prep_async_page(exp, lsm, NULL, &pages[i],
- (obd_off)pages[i].index << PAGE_SHIFT,
- &llu_async_page_ops,
- &llap[i], &llap[i].llap_cookie);
- if (rc) {
- llap[i].llap_cookie = NULL;
- RETURN(rc);
- }
- CDEBUG(D_CACHE, "llap %p page %p cookie %p obj off "LPU64"\n",
- &llap[i], &pages[i], llap[i].llap_cookie,
- (obd_off)pages[i].index << PAGE_SHIFT);
- pages[i].private = (unsigned long)&llap[i];
- llap[i].llap_page = &pages[i];
- llap[i].llap_inode = cookie->lsc_inode;
-
- rc = obd_queue_group_io(exp, lsm, NULL, cookie->lsc_oig,
- llap[i].llap_cookie, cmd,
- pages[i]._offset, pages[i]._count, 0,
- ASYNC_READY | ASYNC_URGENT |
- ASYNC_COUNT_STABLE | ASYNC_GROUP_SYNC);
- if (rc)
- RETURN(rc);
-
- llap[i].llap_queued = 1;
+ /* XXX consider other types later */
+ if (S_ISDIR(llu_i2stat(ino)->st_mode))
+ RETURN(-EISDIR);
+ if (!S_ISREG(llu_i2stat(ino)->st_mode))
+ RETURN(-EOPNOTSUPP);
+
+ session = get_io_session(ino, ioctx->ioctx_xtvlen * 2, cmd);
+ if (!session)
+ RETURN(-ENOMEM);
+
+ cc = _sysio_enumerate_extents(ioctx->ioctx_xtv, ioctx->ioctx_xtvlen,
+ ioctx->ioctx_iov, ioctx->ioctx_iovlen,
+ llu_file_prwv, session);
+
+ if (cc >= 0) {
+ LASSERT(!ioctx->ioctx_cc);
+ ioctx->ioctx_private = session;
+ cc = 0;
+ } else {
+ put_io_session(session);
}
- RETURN(0);
-}
-
-static
-int llu_start_async_io(struct llu_sysio_cookie *cookie)
-{
- struct lov_stripe_md *lsm = llu_i2info(cookie->lsc_inode)->lli_smd;
- struct obd_export *exp = llu_i2obdexp(cookie->lsc_inode);
-
- return obd_trigger_group_io(exp, lsm, NULL, cookie->lsc_oig);
+ liblustre_wait_event(0);
+ RETURN(cc);
}
-/*
- * read/write a continuous buffer for an inode (zero-copy)
- */
-struct llu_sysio_cookie*
-llu_rw(int cmd, struct inode *inode, char *buf, size_t count, loff_t pos)
+void llu_io_init(struct cl_io *io, struct inode *inode, int write)
{
- struct llu_sysio_cookie *cookie;
- int max_pages, rc;
- ENTRY;
-
- max_pages = (count >> PAGE_SHIFT) + 2;
-
- cookie = get_sysio_cookie(inode, max_pages);
- if (!cookie)
- RETURN(ERR_PTR(-ENOMEM));
-
- rc = llu_prep_async_io(cookie, cmd, buf, pos, count);
- if (rc)
- GOTO(out_cleanup, rc);
-
- rc = llu_start_async_io(cookie);
- if (rc)
- GOTO(out_cleanup, rc);
+ struct llu_inode_info *lli = llu_i2info(inode);
-/*
- rc = oig_wait(&oig);
- if (rc) {
- CERROR("file i/o error!\n");
- rw_count = rc;
- }
-*/
- RETURN(cookie);
+ io->u.ci_rw.crw_nonblock = lli->lli_open_flags & O_NONBLOCK;
+ if (write)
+ io->u.ci_wr.wr_append = lli->lli_open_flags & O_APPEND;
+ io->ci_obj = llu_i2info(inode)->lli_clob;
-out_cleanup:
- put_sysio_cookie(cookie);
- RETURN(ERR_PTR(rc));
+ if ((lli->lli_open_flags & O_APPEND) && write)
+ io->ci_lockreq = CILR_MANDATORY;
+ else
+ io->ci_lockreq = CILR_NEVER;
}
-void lov_increase_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
- obd_off size);
-
-struct llu_sysio_callback_args*
-llu_file_write(struct inode *inode, const struct iovec *iovec,
- size_t iovlen, loff_t pos)
+int llu_iop_read(struct inode *ino,
+ struct ioctx *ioctx)
{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct ll_file_data *fd = lli->lli_file_data;
- struct lustre_handle lockh = {0};
- struct lov_stripe_md *lsm = lli->lli_smd;
- struct obd_export *exp = NULL;
- ldlm_policy_data_t policy;
- struct llu_sysio_callback_args *lsca;
- struct llu_sysio_cookie *cookie;
- int astflag = (lli->lli_open_flags & O_NONBLOCK) ?
- LDLM_FL_BLOCK_NOWAIT : 0;
- ldlm_error_t err;
- int iovidx;
- ENTRY;
+ struct intnl_stat *st = llu_i2stat(ino);
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
+ int ret;
- /* XXX consider other types later */
- if (!S_ISREG(lli->lli_st_mode))
- LBUG();
+ /* BUG: 5972 */
+ st->st_atime = CFS_CURRENT_TIME;
- LASSERT(iovlen <= MAX_IOVEC);
-
- exp = llu_i2obdexp(inode);
- if (exp == NULL)
- RETURN(ERR_PTR(-EINVAL));
-
- OBD_ALLOC(lsca, sizeof(*lsca));
- if (!lsca)
- RETURN(ERR_PTR(-ENOMEM));
-
- /* FIXME optimize the following extent locking */
- for (iovidx = 0; iovidx < iovlen; iovidx++) {
- char *buf = (char*)iovec[iovidx].iov_base;
- size_t count = iovec[iovidx].iov_len;
-
- if (count == 0)
- continue;
-
- if (pos + count > lli->lli_maxbytes)
- GOTO(err_out, err = -ERANGE);
-
- /* FIXME libsysio haven't handle O_APPEND?? */
- policy.l_extent.start = pos;
- policy.l_extent.end = pos + count - 1;
-
- err = llu_extent_lock(fd, inode, lsm, LCK_PW, &policy,
- &lockh, astflag);
- if (err != ELDLM_OK)
- GOTO(err_out, err = -ENOLCK);
-
- CDEBUG(D_INFO, "Writing inode %lu, "LPSZ" bytes, offset %llu\n",
- lli->lli_st_ino, count, pos);
-
- cookie = llu_rw(OBD_BRW_WRITE, inode, buf, count, pos);
- if (!IS_ERR(cookie)) {
- /* save cookie */
- lsca->cookies[lsca->ncookies++] = cookie;
- pos += count;
- lov_increase_kms(exp, lsm, pos);
- /* file size grow */
- if (pos > lli->lli_st_size)
- lli->lli_st_size = pos;
- } else {
- llu_extent_unlock(fd, inode, lsm, LCK_PW, &lockh);
- GOTO(err_out, err = PTR_ERR(cookie));
- }
-
- /* XXX errors? */
- err = llu_extent_unlock(fd, inode, lsm, LCK_PW, &lockh);
- if (err)
- CERROR("extent unlock error %d\n", err);
- }
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
- RETURN(lsca);
+ io = ccc_env_thread_io(env);
+ llu_io_init(io, ino, 0);
-err_out:
- /* teardown all async stuff */
- while (lsca->ncookies--) {
- put_sysio_cookie(lsca->cookies[lsca->ncookies]);
- }
- OBD_FREE(lsca, sizeof(*lsca));
+ ret = llu_file_rwx(ino, ioctx, 1);
- RETURN(ERR_PTR(err));
+ cl_env_put(env, &refcheck);
+ return ret;
}
-#if 0
-static void llu_update_atime(struct inode *inode)
+int llu_iop_write(struct inode *ino,
+ struct ioctx *ioctx)
{
- struct llu_inode_info *lli = llu_i2info(inode);
+ struct intnl_stat *st = llu_i2stat(ino);
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
+ int ret;
-#ifdef USE_ATIME
- struct iattr attr;
+ st->st_mtime = st->st_ctime = CFS_CURRENT_TIME;
- attr.ia_atime = LTIME_S(CURRENT_TIME);
- attr.ia_valid = ATTR_ATIME;
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
- if (lli->lli_st_atime == attr.ia_atime) return;
- if (IS_RDONLY(inode)) return;
- if (IS_NOATIME(inode)) return;
+ io = ccc_env_thread_io(env);
+ llu_io_init(io, ino, 1);
- /* ll_inode_setattr() sets inode->i_atime from attr.ia_atime */
- llu_inode_setattr(inode, &attr, 0);
-#else
- /* update atime, but don't explicitly write it out just this change */
- inode->i_atime = CURRENT_TIME;
-#endif
+ ret = llu_file_rwx(ino, ioctx, 0);
+ cl_env_put(env, &refcheck);
+ return ret;
}
-#endif
-struct llu_sysio_callback_args*
-llu_file_read(struct inode *inode, const struct iovec *iovec,
- size_t iovlen, loff_t pos)
+int llu_iop_iodone(struct ioctx *ioctx)
{
- struct llu_inode_info *lli = llu_i2info(inode);
- struct ll_file_data *fd = lli->lli_file_data;
- struct lov_stripe_md *lsm = lli->lli_smd;
- struct lustre_handle lockh = { 0 };
- ldlm_policy_data_t policy;
- struct llu_sysio_callback_args *lsca;
- struct llu_sysio_cookie *cookie;
- int astflag = (lli->lli_open_flags & O_NONBLOCK) ?
- LDLM_FL_BLOCK_NOWAIT : 0;
- __u64 kms;
- int iovidx;
-
- ldlm_error_t err;
+ struct llu_io_session *session;
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
ENTRY;
- OBD_ALLOC(lsca, sizeof(*lsca));
- if (!lsca)
- RETURN(ERR_PTR(-ENOMEM));
-
- for (iovidx = 0; iovidx < iovlen; iovidx++) {
- char *buf = iovec[iovidx].iov_base;
- size_t count = iovec[iovidx].iov_len;
-
- /* "If nbyte is 0, read() will return 0 and have no other results."
- * -- Single Unix Spec */
- if (count == 0)
- continue;
-
- policy.l_extent.start = pos;
- policy.l_extent.end = pos + count - 1;
-
- err = llu_extent_lock(fd, inode, lsm, LCK_PR, &policy,
- &lockh, astflag);
- if (err != ELDLM_OK)
- GOTO(err_out, err = -ENOLCK);
-
- kms = lov_merge_size(lsm, 1);
- if (policy.l_extent.end > kms) {
- /* A glimpse is necessary to determine whether we
- * return a short read or some zeroes at the end of
- * the buffer */
- struct ost_lvb lvb;
- if (llu_glimpse_size(inode, &lvb)) {
- llu_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
- GOTO(err_out, err = -ENOLCK);
- }
- lli->lli_st_size = lvb.lvb_size;
- } else {
- lli->lli_st_size = kms;
- }
-
- CDEBUG(D_INFO, "Reading inode %lu, "LPSZ" bytes, offset %Ld, "
- "i_size "LPU64"\n", lli->lli_st_ino, count, pos,
- lli->lli_st_size);
-
- if (pos >= lli->lli_st_size) {
- llu_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
- break;
- }
-
- cookie = llu_rw(OBD_BRW_READ, inode, buf, count, pos);
- if (!IS_ERR(cookie)) {
- /* save cookie */
- lsca->cookies[lsca->ncookies++] = cookie;
- pos += count;
- } else {
- llu_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
- GOTO(err_out, err = PTR_ERR(cookie));
- }
-
- /* XXX errors? */
- err = llu_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
- if (err)
- CERROR("extent_unlock fail: %d\n", err);
- }
-#if 0
- if (readed > 0)
- llu_update_atime(inode);
-#endif
- RETURN(lsca);
-
-err_out:
- /* teardown all async stuff */
- while (lsca->ncookies--) {
- put_sysio_cookie(lsca->cookies[lsca->ncookies]);
- }
- OBD_FREE(lsca, sizeof(*lsca));
-
- RETURN(ERR_PTR(err));
-}
-
-int llu_iop_iodone(struct ioctx *ioctxp)
-{
- struct llu_sysio_callback_args *lsca = ioctxp->ioctx_private;
- struct llu_sysio_cookie *cookie;
- int i, err = 0, rc = 0;
- ENTRY;
-
- /* write/read(fd, buf, 0) */
- if (!lsca) {
- ioctxp->ioctx_cc = 0;
- RETURN(1);
- }
-
- LASSERT(!IS_ERR(lsca));
-
- for (i = 0; i < lsca->ncookies; i++) {
- cookie = lsca->cookies[i];
- if (cookie) {
- err = oig_wait(cookie->lsc_oig);
- if (err && !rc)
- rc = err;
- if (!rc)
- ioctxp->ioctx_cc += cookie->lsc_rwcount;
- put_sysio_cookie(cookie);
- }
- }
-
- if (rc) {
- LASSERT(rc < 0);
- ioctxp->ioctx_cc = -1;
- ioctxp->ioctx_errno = -rc;
+ liblustre_wait_event(0);
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ io = &ccc_env_info(env)->cti_io;
+ cl_io_fini(env, io);
+ cl_env_put(env, &refcheck);
+ session = (struct llu_io_session *) ioctx->ioctx_private;
+ LASSERT(session);
+ LASSERT(!IS_ERR(session));
+
+ if (session->lis_rc == 0) {
+ ioctx->ioctx_cc = session->lis_rwcount;
+ } else {
+ LASSERT(session->lis_rc < 0);
+ ioctx->ioctx_cc = -1;
+ ioctx->ioctx_errno = -session->lis_rc;
}
- OBD_FREE(lsca, sizeof(*lsca));
- ioctxp->ioctx_private = NULL;
+ put_io_session(session);
+ ioctx->ioctx_private = NULL;
+ liblustre_wait_event(0);
RETURN(1);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff