/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Lustre Light block IO
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * 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 file is part of Lustre, http://www.lustre.org.
+ * 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).
*
- * 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.
+ * 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
*
- * 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.
+ * 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.
*
- * 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.
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/liblustre/rw.c
+ *
+ * Lustre Light block IO
*/
#define DEBUG_SUBSYSTEM S_LLITE
#include <assert.h>
#include <time.h>
#include <sys/types.h>
+#include <sys/stat.h>
#include <sys/queue.h>
#include <fcntl.h>
+#include <sys/uio.h>
#include <sysio.h>
+#ifdef HAVE_XTIO_H
+#include <xtio.h>
+#endif
#include <fs.h>
#include <mount.h>
#include <inode.h>
+#ifdef HAVE_FILE_H
#include <file.h>
+#endif
#undef LIST_HEAD
#include "llite_lib.h"
+struct llu_io_group
+{
+ struct obd_io_group *lig_oig;
+ struct inode *lig_inode;
+ struct lustre_rw_params *lig_params;
+ int lig_maxpages;
+ int lig_npages;
+ __u64 lig_rwcount;
+ struct ll_async_page *lig_llaps;
+ cfs_page_t *lig_pages;
+ void *lig_llap_cookies;
+};
+
+#define LLU_IO_GROUP_SIZE(x) \
+ (sizeof(struct llu_io_group) + \
+ (sizeof(struct ll_async_page) + \
+ sizeof(cfs_page_t) + \
+ llap_cookie_size) * (x))
+
+struct llu_io_session
+{
+ struct inode *lis_inode;
+ int lis_cmd;
+ int lis_max_groups;
+ int lis_ngroups;
+ struct llu_io_group *lis_groups[0];
+};
+#define LLU_IO_SESSION_SIZE(x) \
+ (sizeof(struct llu_io_session) + (x) * 2 * sizeof(void *))
+
+
+typedef ssize_t llu_file_piov_t(const struct iovec *iovec, int iovlen,
+ _SYSIO_OFF_T pos, ssize_t len,
+ void *private);
+
+size_t llap_cookie_size;
+
static int llu_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
{
struct llu_inode_info *lli = llu_i2info(inode);
struct {
char name[16];
struct ldlm_lock *lock;
- struct lov_stripe_md *lsm;
- } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
+ } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock };
__u32 stripe, vallen = sizeof(stripe);
int rc;
ENTRY;
RETURN(0);
/* get our offset in the lov */
- rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe);
+ rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe, lsm);
if (rc != 0) {
CERROR("obd_get_info: rc = %d\n", rc);
LBUG();
RETURN(stripe);
}
-static int llu_extent_lock_callback(struct ldlm_lock *lock,
- struct ldlm_lock_desc *new, void *data,
- int flag)
+int llu_extent_lock_cancel_cb(struct ldlm_lock *lock,
+ struct ldlm_lock_desc *new, void *data,
+ int flag)
{
struct lustre_handle lockh = { 0 };
int rc;
lsm = lli->lli_smd;
stripe = llu_lock_to_stripe_offset(inode, lock);
+ lock_res_and_lock(lock);
kms = ldlm_extent_shift_kms(lock,
- lsm->lsm_oinfo[stripe].loi_kms);
- if (lsm->lsm_oinfo[stripe].loi_kms != kms)
+ lsm->lsm_oinfo[stripe]->loi_kms);
+ unlock_res_and_lock(lock);
+ 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;
+ lsm->lsm_oinfo[stripe]->loi_kms, kms);
+ lsm->lsm_oinfo[stripe]->loi_kms = kms;
iput:
I_RELE(inode);
break;
struct inode *inode = llu_inode_from_lock(lock);
struct llu_inode_info *lli;
struct ost_lvb *lvb;
- int rc, size = sizeof(*lvb), stripe = 0;
+ int rc, stripe = 0;
ENTRY;
if (inode == NULL)
if (lli->lli_smd->lsm_stripe_count > 1)
stripe = llu_lock_to_stripe_offset(inode, lock);
- rc = lustre_pack_reply(req, 1, &size, NULL);
+ req_capsule_extend(&req->rq_pill, &RQF_LDLM_GL_CALLBACK);
+ req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER,
+ sizeof(*lvb));
+ rc = req_capsule_server_pack(&req->rq_pill);
if (rc) {
- CERROR("lustre_pack_reply: %d\n", rc);
+ CERROR("failed 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;
+ lvb = req_capsule_server_get(&req->rq_pill, &RMF_DLM_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);
+ LDLM_DEBUG(lock, "i_size: "LPU64" -> stripe number %u -> kms "LPU64,
+ (__u64)llu_i2stat(inode)->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);
+ lustre_pack_reply(req, 1, 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)
+static int llu_merge_lvb(struct inode *inode)
{
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;
+ struct intnl_stat *st = llu_i2stat(inode);
+ struct ost_lvb lvb;
+ int rc;
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);
+ inode_init_lvb(inode, &lvb);
+ rc = obd_merge_lvb(sbi->ll_dt_exp, lli->lli_smd, &lvb, 0);
+ st->st_size = lvb.lvb_size;
+ st->st_blocks = lvb.lvb_blocks;
+ /* handle st_blocks overflow gracefully */
+ if (st->st_blocks < lvb.lvb_blocks)
+ st->st_blocks = ~0UL;
+ st->st_mtime = lvb.lvb_mtime;
+ st->st_atime = lvb.lvb_atime;
+ st->st_ctime = lvb.lvb_ctime;
- CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64"\n", lvb->lvb_size);
+ RETURN(rc);
+}
- obd_cancel(sbi->ll_osc_exp, lli->lli_smd, LCK_PR, &lockh);
+int llu_local_size(struct inode *inode)
+{
+ ldlm_policy_data_t policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
+ struct llu_inode_info *lli = llu_i2info(inode);
+ struct llu_sb_info *sbi = llu_i2sbi(inode);
+ struct lustre_handle lockh = { 0 };
+ int flags = 0;
+ int rc;
+ ENTRY;
+ if (lli->lli_smd->lsm_stripe_count == 0)
+ RETURN(0);
+
+ rc = obd_match(sbi->ll_dt_exp, lli->lli_smd, LDLM_EXTENT,
+ &policy, LCK_PR, &flags, inode, &lockh);
+ if (rc < 0)
+ RETURN(rc);
+ else if (rc == 0)
+ RETURN(-ENODATA);
+
+ rc = llu_merge_lvb(inode);
+ obd_cancel(sbi->ll_dt_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)
+/* 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 llu_sb_info *sbi = llu_i2sbi(inode);
struct llu_inode_info *lli = llu_i2info(inode);
+ struct intnl_stat *st = llu_i2stat(inode);
+ struct llu_sb_info *sbi = llu_i2sbi(inode);
+ struct lustre_handle lockh = { 0 };
+ struct ldlm_enqueue_info einfo = { 0 };
+ struct obd_info oinfo = { { { 0 } } };
int rc;
ENTRY;
- LASSERT(lockh->cookie == 0);
+ /* If size is cached on the mds, skip glimpse. */
+ if (lli->lli_flags & LLIF_MDS_SIZE_LOCK)
+ RETURN(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))
+ CDEBUG(D_DLMTRACE, "Glimpsing inode "LPU64"\n", (__u64)st->st_ino);
+
+ if (!lli->lli_smd) {
+ CDEBUG(D_DLMTRACE, "No objects for inode "LPU64"\n",
+ (__u64)st->st_ino);
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);
+ einfo.ei_type = LDLM_EXTENT;
+ einfo.ei_mode = LCK_PR;
+ einfo.ei_cb_bl = osc_extent_blocking_cb;
+ einfo.ei_cb_cp = ldlm_completion_ast;
+ einfo.ei_cb_gl = llu_glimpse_callback;
+ einfo.ei_cbdata = inode;
- 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;
+ oinfo.oi_policy.l_extent.end = OBD_OBJECT_EOF;
+ oinfo.oi_lockh = &lockh;
+ oinfo.oi_md = lli->lli_smd;
+ oinfo.oi_flags = LDLM_FL_HAS_INTENT;
- if (policy->l_extent.start == 0 &&
- policy->l_extent.end == OBD_OBJECT_EOF)
- lli->lli_st_size = lov_merge_size(lsm, 1);
+ rc = obd_enqueue_rqset(sbi->ll_dt_exp, &oinfo, &einfo);
+ if (rc) {
+ CERROR("obd_enqueue returned rc %d, returning -EIO\n", rc);
+ RETURN(rc > 0 ? -EIO : rc);
+ }
- //inode->i_mtime = lov_merge_mtime(lsm, inode->i_mtime);
+ rc = llu_merge_lvb(inode);
+ CDEBUG(D_DLMTRACE, "glimpse: size: "LPU64", blocks: "LPU64"\n",
+ (__u64)st->st_size, (__u64)st->st_blocks);
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)
+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);
+ struct intnl_stat *st = llu_i2stat(inode);
+ struct ldlm_enqueue_info einfo = { 0 };
+ struct obd_info oinfo = { { { 0 } } };
+ struct ost_lvb lvb;
int rc;
ENTRY;
- LASSERT(lockh->cookie == 0);
+ LASSERT(!lustre_handle_is_used(lockh));
+ CLASSERT(ELDLM_OK == 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))
+ (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
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);
-}
+ CDEBUG(D_DLMTRACE, "Locking inode %llu, start "LPU64" end "LPU64"\n",
+ (unsigned long long)st->st_ino, policy->l_extent.start,
+ policy->l_extent.end);
-/*
- * 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)
-{
- 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;
- ENTRY;
+ einfo.ei_type = LDLM_EXTENT;
+ einfo.ei_mode = mode;
+ einfo.ei_cb_bl = osc_extent_blocking_cb;
+ einfo.ei_cb_cp = ldlm_completion_ast;
+ einfo.ei_cb_gl = llu_glimpse_callback;
+ einfo.ei_cbdata = inode;
- rc = llu_extent_lock_no_validate(fd, inode, lsm, mode, extent,
- lockh, astflags);
- if (rc != ELDLM_OK)
- RETURN(rc);
+ oinfo.oi_policy = *policy;
+ oinfo.oi_lockh = lockh;
+ oinfo.oi_md = lsm;
+ oinfo.oi_flags = ast_flags;
- if (test_bit(LLI_F_HAVE_OST_SIZE_LOCK, &lli->lli_flags))
- RETURN(0);
+ rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
+ *policy = oinfo.oi_policy;
+ if (rc > 0)
+ rc = -EIO;
- rc = llu_inode_getattr(inode, lsm);
- if (rc) {
- llu_extent_unlock(fd, inode, lsm, mode, lockh);
- RETURN(rc);
- }
+ inode_init_lvb(inode, &lvb);
+ obd_merge_lvb(sbi->ll_dt_exp, lsm, &lvb, 1);
+ if (policy->l_extent.start == 0 &&
+ policy->l_extent.end == OBD_OBJECT_EOF)
+ st->st_size = lvb.lvb_size;
- 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);
+ if (rc == 0) {
+ st->st_mtime = lvb.lvb_mtime;
+ st->st_atime = lvb.lvb_atime;
+ st->st_ctime = lvb.lvb_ctime;
}
- RETURN(0);
+ RETURN(rc);
}
-#endif
int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode,
struct lov_stripe_md *lsm, int mode,
int rc;
ENTRY;
+ CLASSERT(ELDLM_OK == 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))
+ (sbi->ll_flags & LL_SBI_NOLCK) || mode == LCK_NL)
RETURN(0);
- rc = obd_cancel(sbi->ll_osc_exp, lsm, mode, lockh);
+ rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
RETURN(rc);
}
int llap_magic;
void *llap_cookie;
int llap_queued;
- struct page *llap_page;
+ cfs_page_t *llap_page;
struct inode *llap_inode;
};
-static struct ll_async_page *llap_from_cookie(void *cookie)
+static inline struct ll_async_page *llap_from_cookie(void *ptr)
{
- struct ll_async_page *llap = cookie;
- if (llap->llap_magic != LLAP_MAGIC)
- return ERR_PTR(-EINVAL);
- return llap;
-};
+ struct ll_async_page *ap = ptr;
+ LASSERT(ap->llap_magic == LLAP_MAGIC);
+ return ap;
+}
static void llu_ap_fill_obdo(void *data, int cmd, struct obdo *oa)
{
ENTRY;
llap = llap_from_cookie(data);
- if (IS_ERR(llap)) {
- EXIT;
- return;
- }
-
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 (cmd & OBD_BRW_WRITE)
+ valid_flags |= OBD_MD_FLMTIME | OBD_MD_FLCTIME |
+ OBD_MD_FLUID | OBD_MD_FLGID |
+ OBD_MD_FLFID | OBD_MD_FLGENER;
obdo_from_inode(oa, inode, valid_flags);
EXIT;
}
-/* called for each page in a completed rpc.*/
-static void llu_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
+static void llu_ap_update_obdo(void *data, int cmd, struct obdo *oa,
+ obd_valid valid)
{
struct ll_async_page *llap;
- struct page *page;
+ ENTRY;
llap = llap_from_cookie(data);
- if (IS_ERR(llap)) {
- EXIT;
- return;
- }
+ obdo_from_inode(oa, llap->llap_inode, valid);
+
+ EXIT;
+}
+
+/* called for each page in a completed rpc.*/
+static int llu_ap_completion(void *data, int cmd, struct obdo *oa, int rc)
+{
+ struct ll_async_page *llap;
+ cfs_page_t *page;
+ ENTRY;
+ llap = llap_from_cookie(data);
llap->llap_queued = 0;
page = llap->llap_page;
if (rc != 0) {
- if (cmd == OBD_BRW_WRITE)
- CERROR("writeback error on page %p index %ld: %d\n",
+ if (cmd & OBD_BRW_WRITE)
+ CERROR("writeback error on page %p index %ld: %d\n",
page, page->index, rc);
}
- EXIT;
+ RETURN(0);
+}
+
+static struct obd_capa * llu_ap_lookup_capa(void *data, int cmd)
+{
+ return NULL;
}
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_update_obdo = llu_ap_update_obdo,
.ap_completion = llu_ap_completion,
+ .ap_lookup_capa = llu_ap_lookup_capa,
};
-static
-struct llu_sysio_cookie* get_sysio_cookie(struct inode *inode, int maxpages)
-{
- 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;
-}
-
-static
-void put_sysio_cookie(struct llu_sysio_cookie *cookie)
+static int llu_queue_pio(int cmd, struct llu_io_group *group,
+ char *buf, size_t count, loff_t pos)
{
- 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;
-#ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
- struct page *pages = cookie->lsc_pages;
-#endif
- 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);
-#ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
- if (pages[i]._managed) {
- free(pages[i].addr);
- pages[i]._managed = 0;
- }
-#endif
- }
-
- I_RELE(cookie->lsc_inode);
-
- oig_release(cookie->lsc_oig);
- OBD_FREE(cookie, LLU_SYSIO_COOKIE_SIZE(cookie->lsc_maxpages));
-}
-
-#ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
-/* Note: these code should be removed finally, don't need
- * more cleanup
- */
-static
-int prepare_unaligned_write(struct llu_sysio_cookie *cookie)
-{
- struct inode *inode = cookie->lsc_inode;
- struct llu_inode_info *lli = llu_i2info(inode);
- struct lov_stripe_md *lsm = lli->lli_smd;
- struct obdo oa;
- struct page *pages = cookie->lsc_pages;
- int i, pgidx[2] = {0, cookie->lsc_npages-1};
- int rc;
- ENTRY;
-
- for (i = 0; i < 2; i++) {
- struct page *oldpage = &pages[pgidx[i]];
- struct page newpage;
- struct brw_page pg;
- char *newbuf;
-
- if (i == 0 && pgidx[0] == pgidx[1])
- continue;
-
- LASSERT(oldpage->_offset + oldpage->_count <= PAGE_CACHE_SIZE);
-
- if (oldpage->_count == PAGE_CACHE_SIZE)
- continue;
-
- if (oldpage->index << PAGE_CACHE_SHIFT >=
- lli->lli_st_size)
- continue;
-
- newbuf = malloc(PAGE_CACHE_SIZE);
- if (!newbuf)
- return -ENOMEM;
-
- newpage.index = oldpage->index;
- newpage.addr = newbuf;
-
- pg.pg = &newpage;
- pg.off = ((obd_off)newpage.index << PAGE_CACHE_SHIFT);
- if (pg.off + PAGE_CACHE_SIZE > lli->lli_st_size)
- pg.count = lli->lli_st_size % PAGE_CACHE_SIZE;
- else
- pg.count = PAGE_CACHE_SIZE;
- pg.flag = 0;
-
- oa.o_id = lsm->lsm_object_id;
- oa.o_mode = lli->lli_st_mode;
- oa.o_valid = OBD_MD_FLID | OBD_MD_FLMODE | OBD_MD_FLTYPE;
-
- /* issue read */
- rc = obd_brw(OBD_BRW_READ, llu_i2obdexp(inode), &oa, lsm, 1, &pg, NULL);
- if (rc) {
- free(newbuf);
- RETURN(rc);
- }
-
- /* copy page content, and reset page params */
- memcpy(newbuf + oldpage->_offset,
- (char*)oldpage->addr + oldpage->_offset,
- oldpage->_count);
-
- oldpage->addr = newbuf;
- if ((((obd_off)oldpage->index << PAGE_CACHE_SHIFT) +
- oldpage->_offset + oldpage->_count) > lli->lli_st_size)
- oldpage->_count += oldpage->_offset;
- else
- oldpage->_count = PAGE_CACHE_SIZE;
- oldpage->_offset = 0;
- oldpage->_managed = 1;
- }
-
- RETURN(0);
-}
-#endif
-
-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 llu_inode_info *lli = llu_i2info(group->lig_inode);
+ struct intnl_stat *st = llu_i2stat(group->lig_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;
+ struct obd_export *exp = llu_i2obdexp(group->lig_inode);
+ cfs_page_t *pages = &group->lig_pages[group->lig_npages],*page = pages;
+ struct ll_async_page *llap = &group->lig_llaps[group->lig_npages];
+ void *llap_cookie = group->lig_llap_cookies +
+ llap_cookie_size * group->lig_npages;
+ int i, rc, npages = 0, ret_bytes = 0;
+ int local_lock;
ENTRY;
if (!exp)
RETURN(-EINVAL);
+ local_lock = group->lig_params->lrp_lock_mode != LCK_NL;
/* 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;
+ offset = (pos & ~CFS_PAGE_MASK);
+ index = pos >> CFS_PAGE_SHIFT;
+ bytes = CFS_PAGE_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)
+ if (/* local_lock && */
+ cmd == OBD_BRW_READ && pos + bytes >= st->st_size) {
+ if (pos >= st->st_size)
break;
- bytes = lli->lli_st_size - pos;
+ bytes = st->st_size - pos;
}
/* prepare page for this index */
- pages[npages].index = index;
- pages[npages].addr = buf - offset;
+ page->index = index;
+ page->addr = buf - offset;
- pages[npages]._offset = offset;
- pages[npages]._count = bytes;
+ page->_offset = offset;
+ page->_count = bytes;
+ page++;
npages++;
count -= bytes;
pos += bytes;
buf += bytes;
- cookie->lsc_rwcount += bytes;
+ group->lig_rwcount += bytes;
+ ret_bytes += bytes;
} while (count);
- cookie->lsc_npages = npages;
+ group->lig_npages += npages;
-#ifdef LIBLUSTRE_HANDLE_UNALIGNED_PAGE
- if (cmd == OBD_BRW_WRITE) {
- rc = prepare_unaligned_write(cookie);
- if (rc)
- RETURN(rc);
- }
-#endif
-
- 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,
+ for (i = 0, page = pages; i < npages;
+ i++, page++, llap++, llap_cookie += llap_cookie_size){
+ llap->llap_magic = LLAP_MAGIC;
+ llap->llap_cookie = llap_cookie;
+ rc = obd_prep_async_page(exp, lsm, NULL, page,
+ (obd_off)page->index << CFS_PAGE_SHIFT,
&llu_async_page_ops,
- &llap[i], &llap[i].llap_cookie);
+ llap, &llap->llap_cookie,
+ 1 /* no cache in liblustre at all */,
+ NULL);
if (rc) {
- llap[i].llap_cookie = NULL;
+ LASSERT(rc < 0);
+ llap->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,
+
+ CDEBUG(D_CACHE, "llap %p page %p group %p obj off "LPU64"\n",
+ llap, page, llap->llap_cookie,
+ (obd_off)pages->index << CFS_PAGE_SHIFT);
+ page->private = (unsigned long)llap;
+ llap->llap_page = page;
+ llap->llap_inode = group->lig_inode;
+
+ rc = obd_queue_group_io(exp, lsm, NULL, group->lig_oig,
+ llap->llap_cookie, cmd,
+ page->_offset, page->_count,
+ group->lig_params->lrp_brw_flags,
ASYNC_READY | ASYNC_URGENT |
ASYNC_COUNT_STABLE | ASYNC_GROUP_SYNC);
- if (rc)
+ if (!local_lock && cmd == OBD_BRW_READ) {
+ /*
+ * In OST-side locking case short reads cannot be
+ * detected properly.
+ *
+ * The root of the problem is that
+ *
+ * kms = lov_merge_size(lsm, 1);
+ * if (end >= kms)
+ * glimpse_size(inode);
+ * else
+ * st->st_size = kms;
+ *
+ * logic in the read code (both llite and liblustre)
+ * only works correctly when client holds DLM lock on
+ * [start, end]. Without DLM lock KMS can be
+ * completely out of date, and client can either make
+ * spurious short-read (missing concurrent write), or
+ * return stale data (missing concurrent
+ * truncate). For llite client this is fatal, because
+ * incorrect data are cached and can be later sent
+ * back to the server (vide bug 5047). This is hard to
+ * fix by handling short-reads on the server, as there
+ * is no easy way to communicate file size (or amount
+ * of bytes read/written) back to the client,
+ * _especially_ because OSC pages can be sliced and
+ * dices into multiple RPCs arbitrary. Fortunately,
+ * liblustre doesn't cache data and the worst case is
+ * that we get race with concurrent write or truncate.
+ */
+ }
+ if (rc) {
+ LASSERT(rc < 0);
RETURN(rc);
+ }
- llap[i].llap_queued = 1;
+ llap->llap_queued = 1;
}
- RETURN(0);
+ RETURN(ret_bytes);
}
static
-int llu_start_async_io(struct llu_sysio_cookie *cookie)
+struct llu_io_group * get_io_group(struct inode *inode, int maxpages,
+ struct lustre_rw_params *params)
{
- struct lov_stripe_md *lsm = llu_i2info(cookie->lsc_inode)->lli_smd;
- struct obd_export *exp = llu_i2obdexp(cookie->lsc_inode);
+ struct llu_io_group *group;
+ int rc;
- return obd_trigger_group_io(exp, lsm, NULL, cookie->lsc_oig);
-}
+ if (!llap_cookie_size)
+ llap_cookie_size = obd_prep_async_page(llu_i2obdexp(inode),
+ NULL, NULL, NULL, 0,
+ NULL, NULL, NULL, 0,
+ NULL);
-/*
- * 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)
-{
- struct llu_sysio_cookie *cookie;
- int max_pages, rc;
- ENTRY;
+ OBD_ALLOC(group, LLU_IO_GROUP_SIZE(maxpages));
+ if (!group)
+ return ERR_PTR(-ENOMEM);
- max_pages = (count >> PAGE_SHIFT) + 2;
+ I_REF(inode);
+ group->lig_inode = inode;
+ group->lig_maxpages = maxpages;
+ group->lig_params = params;
+ group->lig_llaps = (struct ll_async_page *)(group + 1);
+ group->lig_pages = (cfs_page_t *)(&group->lig_llaps[maxpages]);
+ group->lig_llap_cookies = (void *)(&group->lig_pages[maxpages]);
+
+ rc = oig_init(&group->lig_oig);
+ if (rc) {
+ OBD_FREE(group, LLU_IO_GROUP_SIZE(maxpages));
+ return ERR_PTR(rc);
+ }
- cookie = get_sysio_cookie(inode, max_pages);
- if (!cookie)
- RETURN(ERR_PTR(-ENOMEM));
+ return group;
+}
- rc = llu_prep_async_io(cookie, cmd, buf, pos, count);
- if (rc)
- GOTO(out_cleanup, rc);
+static int max_io_pages(ssize_t len, int iovlen)
+{
+ return (((len + CFS_PAGE_SIZE -1) / CFS_PAGE_SIZE) + 2 + iovlen - 1);
+}
- rc = llu_start_async_io(cookie);
- if (rc)
- GOTO(out_cleanup, rc);
+static
+void put_io_group(struct llu_io_group *group)
+{
+ struct lov_stripe_md *lsm = llu_i2info(group->lig_inode)->lli_smd;
+ struct obd_export *exp = llu_i2obdexp(group->lig_inode);
+ struct ll_async_page *llap = group->lig_llaps;
+ int i;
-/*
- rc = oig_wait(&oig);
- if (rc) {
- CERROR("file i/o error!\n");
- rw_count = rc;
+ for (i = 0; i < group->lig_npages; i++, llap++) {
+ if (llap->llap_cookie)
+ obd_teardown_async_page(exp, lsm, NULL,
+ llap->llap_cookie);
}
-*/
- RETURN(cookie);
-out_cleanup:
- put_sysio_cookie(cookie);
- RETURN(ERR_PTR(rc));
-}
+ I_RELE(group->lig_inode);
-void lov_increase_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
- obd_off size);
+ oig_release(group->lig_oig);
+ OBD_FREE(group, LLU_IO_GROUP_SIZE(group->lig_maxpages));
+}
-struct llu_sysio_callback_args*
-llu_file_write(struct inode *inode, const struct iovec *iovec,
- size_t iovlen, loff_t pos)
+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 intnl_stat *st = llu_i2stat(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;
+ struct llu_io_group *iogroup;
+ struct lustre_rw_params p;
+ struct ost_lvb lvb;
+ __u64 kms;
+ int err, is_read, iovidx, ret;
+ int local_lock;
+ ssize_t ret_len = len;
ENTRY;
- /* XXX consider other types later */
- if (!S_ISREG(lli->lli_st_mode))
- LBUG();
-
- LASSERT(iovlen <= MAX_IOVEC);
+ /* in a large iov read/write we'll be repeatedly called.
+ * so give a chance to answer cancel ast here
+ */
+ liblustre_wait_event(0);
exp = llu_i2obdexp(inode);
if (exp == NULL)
- RETURN(ERR_PTR(-EINVAL));
+ RETURN(-EINVAL);
+
+ if (len == 0 || iovlen == 0)
+ RETURN(0);
- OBD_ALLOC(lsca, sizeof(*lsca));
- if (!lsca)
- RETURN(ERR_PTR(-ENOMEM));
+ if (pos + len > lli->lli_maxbytes)
+ RETURN(-ERANGE);
+
+ lustre_build_lock_params(session->lis_cmd, lli->lli_open_flags,
+ lli->lli_sbi->ll_lco.lco_flags,
+ pos, len, &p);
+
+ iogroup = get_io_group(inode, max_io_pages(len, iovlen), &p);
+ if (IS_ERR(iogroup))
+ RETURN(PTR_ERR(iogroup));
+
+ local_lock = p.lrp_lock_mode != LCK_NL;
+
+ err = llu_extent_lock(fd, inode, lsm, p.lrp_lock_mode, &p.lrp_policy,
+ &lockh, p.lrp_ast_flags);
+ if (err != ELDLM_OK)
+ GOTO(err_put, err);
+
+ is_read = (session->lis_cmd == OBD_BRW_READ);
+ if (is_read) {
+ /*
+ * If OST-side locking is used, KMS can be completely out of
+ * date, and, hence, cannot be used for short-read
+ * detection. Rely in OST to handle short reads in that case.
+ */
+ inode_init_lvb(inode, &lvb);
+ obd_merge_lvb(exp, lsm, &lvb, 1);
+ kms = lvb.lvb_size;
+ /* extent.end is last byte of the range */
+ if (p.lrp_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
+ *
+ * In the case of OST-side locking KMS can be
+ * completely out of date and short-reads maybe
+ * mishandled. See llu_queue_pio() for more detailed
+ * comment.
+ */
+ if ((err = llu_glimpse_size(inode))) {
+ GOTO(err_unlock, err);
+ }
+ } else {
+ st->st_size = kms;
+ }
+ } else if (lli->lli_open_flags & O_APPEND) {
+ pos = st->st_size;
+ }
- /* FIXME optimize the following extent locking */
for (iovidx = 0; iovidx < iovlen; iovidx++) {
- char *buf = (char*)iovec[iovidx].iov_base;
+ char *buf = (char *) iovec[iovidx].iov_base;
size_t count = iovec[iovidx].iov_len;
- if (count == 0)
+ if (!count)
continue;
+ if (len < count)
+ count = len;
+ if (IS_BAD_PTR(buf) || IS_BAD_PTR(buf + count)) {
+ GOTO(err_unlock, err = -EFAULT);
+ }
- 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 %Lu\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;
+ if (is_read) {
+ if (/* local_lock && */ pos >= st->st_size)
+ break;
} else {
- llu_extent_unlock(fd, inode, lsm, LCK_PW, &lockh);
- GOTO(err_out, err = PTR_ERR(cookie));
+ if (pos >= lli->lli_maxbytes) {
+ GOTO(err_unlock, err = -EFBIG);
+ }
+ if (pos + count >= lli->lli_maxbytes)
+ count = lli->lli_maxbytes - pos;
}
- /* XXX errors? */
- err = llu_extent_unlock(fd, inode, lsm, LCK_PW, &lockh);
- if (err)
- CERROR("extent unlock error %d\n", err);
+ ret = llu_queue_pio(session->lis_cmd, iogroup, buf, count, pos);
+ if (ret < 0) {
+ GOTO(err_unlock, err = ret);
+ } else {
+ pos += ret;
+ if (!is_read) {
+ LASSERT(ret == count);
+ obd_adjust_kms(exp, lsm, pos, 0);
+ /* file size grow immediately */
+ if (pos > st->st_size)
+ st->st_size = pos;
+ }
+ len -= ret;
+ if (!len)
+ break;
+ }
}
+ LASSERT(len == 0 || is_read); /* libsysio should guarantee this */
- RETURN(lsca);
+ err = obd_trigger_group_io(exp, lsm, NULL, iogroup->lig_oig);
+ if (err)
+ GOTO(err_unlock, err);
-err_out:
- /* teardown all async stuff */
- while (lsca->ncookies--) {
- put_sysio_cookie(lsca->cookies[lsca->ncookies]);
+ err = oig_wait(iogroup->lig_oig);
+ if (err) {
+ CERROR("%s error: %s\n", is_read ? "read" : "write", strerror(-err));
+ GOTO(err_unlock, err);
}
- OBD_FREE(lsca, sizeof(*lsca));
- RETURN(ERR_PTR(err));
+ ret = llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
+ if (ret)
+ CERROR("extent unlock error %d\n", ret);
+
+ session->lis_groups[session->lis_ngroups++] = iogroup;
+ RETURN(ret_len);
+
+err_unlock:
+ llu_extent_unlock(fd, inode, lsm, p.lrp_lock_mode, &lockh);
+err_put:
+ put_io_group(iogroup);
+ RETURN((ssize_t)err);
}
-#if 0
-static void llu_update_atime(struct inode *inode)
+static
+struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
{
- struct llu_inode_info *lli = llu_i2info(inode);
+ struct llu_io_session *session;
-#ifdef USE_ATIME
- struct iattr attr;
+ OBD_ALLOC(session, LLU_IO_SESSION_SIZE(ngroups));
+ if (!session)
+ return NULL;
- attr.ia_atime = LTIME_S(CURRENT_TIME);
- attr.ia_valid = ATTR_ATIME;
+ I_REF(ino);
+ session->lis_inode = ino;
+ session->lis_max_groups = ngroups;
+ session->lis_cmd = cmd;
+ return session;
+}
- if (lli->lli_st_atime == attr.ia_atime) return;
- if (IS_RDONLY(inode)) return;
- if (IS_NOATIME(inode)) return;
+static void put_io_session(struct llu_io_session *session)
+{
+ int i;
- /* 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
+ for (i = 0; i < session->lis_ngroups; i++) {
+ if (session->lis_groups[i]) {
+ put_io_group(session->lis_groups[i]);
+ session->lis_groups[i] = NULL;
+ }
+ }
+
+ I_RELE(session->lis_inode);
+ OBD_FREE(session, LLU_IO_SESSION_SIZE(session->lis_max_groups));
}
-#endif
-struct llu_sysio_callback_args*
-llu_file_read(struct inode *inode, const struct iovec *iovec,
- size_t iovlen, loff_t pos)
+static int llu_file_rwx(struct inode *ino,
+ struct ioctx *ioctx,
+ int read)
{
- 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;
+ ssize_t cc;
+ int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
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;
+ LASSERT(ioctx->ioctx_xtvlen >= 0);
+ LASSERT(ioctx->ioctx_iovlen >= 0);
- /* "If nbyte is 0, read() will return 0 and have no other results."
- * -- Single Unix Spec */
- if (count == 0)
- continue;
+ liblustre_wait_event(0);
- 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;
- }
+ if (!ioctx->ioctx_xtvlen)
+ RETURN(0);
- CDEBUG(D_INFO, "Reading inode %lu, "LPSZ" bytes, offset %Ld, "
- "i_size "LPU64"\n", lli->lli_st_ino, count, pos,
- lli->lli_st_size);
+ /* 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);
+ }
- if (pos >= lli->lli_st_size) {
- llu_extent_unlock(fd, inode, lsm, LCK_PR, &lockh);
- break;
- }
+ liblustre_wait_event(0);
+ RETURN(cc);
+}
- 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));
- }
+int llu_iop_read(struct inode *ino,
+ struct ioctx *ioctx)
+{
+ /* BUG: 5972 */
+ struct intnl_stat *st = llu_i2stat(ino);
+ st->st_atime = CURRENT_TIME;
- /* 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);
+ return llu_file_rwx(ino, ioctx, 1);
+}
-err_out:
- /* teardown all async stuff */
- while (lsca->ncookies--) {
- put_sysio_cookie(lsca->cookies[lsca->ncookies]);
- }
- OBD_FREE(lsca, sizeof(*lsca));
+int llu_iop_write(struct inode *ino,
+ struct ioctx *ioctx)
+{
+ struct intnl_stat *st = llu_i2stat(ino);
+ st->st_mtime = st->st_ctime = CURRENT_TIME;
- RETURN(ERR_PTR(err));
+ return llu_file_rwx(ino, ioctx, 0);
}
-int llu_iop_iodone(struct ioctx *ioctxp)
+int llu_iop_iodone(struct ioctx *ioctx)
{
- struct llu_sysio_callback_args *lsca = ioctxp->ioctx_private;
- struct llu_sysio_cookie *cookie;
+ struct llu_io_session *session;
+ struct llu_io_group *group;
int i, err = 0, rc = 0;
ENTRY;
- /* write/read(fd, buf, 0) */
- if (!lsca) {
- ioctxp->ioctx_cc = 0;
- RETURN(1);
- }
+ liblustre_wait_event(0);
- LASSERT(!IS_ERR(lsca));
+ session = (struct llu_io_session *) ioctx->ioctx_private;
+ LASSERT(session);
+ LASSERT(!IS_ERR(session));
- for (i = 0; i < lsca->ncookies; i++) {
- cookie = lsca->cookies[i];
- if (cookie) {
- err = oig_wait(cookie->lsc_oig);
- if (err && !rc)
- rc = err;
+ for (i = 0; i < session->lis_ngroups; i++) {
+ group = session->lis_groups[i];
+ if (group) {
+ if (!rc) {
+ err = oig_wait(group->lig_oig);
+ if (err)
+ rc = err;
+ }
if (!rc)
- ioctxp->ioctx_cc += cookie->lsc_rwcount;
- put_sysio_cookie(cookie);
+ ioctx->ioctx_cc += group->lig_rwcount;
+ put_io_group(group);
+ session->lis_groups[i] = NULL;
}
}
if (rc) {
LASSERT(rc < 0);
- ioctxp->ioctx_cc = -1;
- ioctxp->ioctx_errno = -rc;
+ ioctx->ioctx_cc = -1;
+ ioctx->ioctx_errno = -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