/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Lustre Light Super operations
+ * GPL HEADER START
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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.
*
- * 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.
+ * 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 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.
+ * 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
*
- * 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.
+ * 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.
+ *
+ * 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
#include "llite_lib.h"
-#if 0
-void llu_pgcache_remove_extent(struct inode *inode, struct lov_stripe_md *lsm,
- struct ldlm_lock *lock)
-{
- clear_bit(LLI_F_HAVE_SIZE_LOCK, &(llu_i2info(inode)->lli_flags));
-#if 0
- struct ldlm_extent *extent = &lock->l_extent;
- unsigned long start, end, count, skip, i, j;
- struct page *page;
- int ret;
- ENTRY;
-
- CDEBUG(D_INODE, "obdo %lu inode %p ["LPU64"->"LPU64"] size: %llu\n",
- inode->i_ino, inode, extent->start, extent->end, inode->i_size);
-
- start = extent->start >> PAGE_CACHE_SHIFT;
- count = ~0;
- skip = 0;
- end = (extent->end >> PAGE_CACHE_SHIFT) + 1;
- if ((end << PAGE_CACHE_SHIFT) < extent->end)
- end = ~0;
- if (lsm->lsm_stripe_count > 1) {
- struct {
- char name[16];
- struct ldlm_lock *lock;
- struct lov_stripe_md *lsm;
- } key = { .name = "lock_to_stripe", .lock = lock, .lsm = lsm };
- __u32 stripe;
- __u32 vallen = sizeof(stripe);
- int rc;
-
- /* get our offset in the lov */
- rc = obd_get_info(ll_i2obdconn(inode), sizeof(key),
- &key, &vallen, &stripe);
- if (rc != 0) {
- CERROR("obd_get_info: rc = %d\n", rc);
- LBUG();
- }
- LASSERT(stripe < lsm->lsm_stripe_count);
-
- count = lsm->lsm_stripe_size >> PAGE_CACHE_SHIFT;
- skip = (lsm->lsm_stripe_count - 1) * count;
- start += (start/count * skip) + (stripe * count);
- if (end != ~0)
- end += (end/count * skip) + (stripe * count);
- }
-
- i = (inode->i_size + PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT;
- if (end >= i)
- clear_bit(LLI_F_HAVE_SIZE_LOCK, &(ll_i2info(inode)->lli_flags));
- if (i < end)
- end = i;
-
- CDEBUG(D_INODE, "start: %lu j: %lu count: %lu skip: %lu end: %lu\n",
- start, start % count, count, skip, end);
-
- /* start writeback on dirty pages in the extent when its PW */
- for (i = start, j = start % count;
- lock->l_granted_mode == LCK_PW && i < end; j++, i++) {
- if (j == count) {
- i += skip;
- j = 0;
- }
- /* its unlikely, but give us a chance to bail when we're out */
- PGCACHE_WRLOCK(inode->i_mapping);
- if (list_empty(&inode->i_mapping->dirty_pages)) {
- CDEBUG(D_INODE, "dirty list empty\n");
- PGCACHE_WRUNLOCK(inode->i_mapping);
- break;
- }
- PGCACHE_WRUNLOCK(inode->i_mapping);
-
- if (need_resched())
- schedule();
-
- /* always do a getattr for the first person to pop out of lock
- * acquisition.. the DID_GETATTR flag and semaphore serialize
- * this initial race. we used to make a decision based on whether
- * the lock was matched or acquired, but the matcher could win the
- * waking race with the first issuer so that was no good..
- */
- if (test_bit(LLI_F_DID_GETATTR, &lli->lli_flags))
- RETURN(ELDLM_OK);
-
- down(&lli->lli_getattr_sem);
-
- if (!test_bit(LLI_F_DID_GETATTR, &lli->lli_flags)) {
- rc = ll_inode_getattr(inode, lsm);
- if (rc == 0) {
- set_bit(LLI_F_DID_GETATTR, &lli->lli_flags);
- } else {
- unlock_page(page);
- }
- page_cache_release(page);
-
- }
+typedef ssize_t llu_file_piov_t(const struct iovec *iovec, int iovlen,
+ _SYSIO_OFF_T pos, ssize_t len,
+ void *private);
- /* our locks are page granular thanks to osc_enqueue, we invalidate the
- * whole page. */
- LASSERT((extent->start & ~PAGE_CACHE_MASK) == 0);
- LASSERT(((extent->end+1) & ~PAGE_CACHE_MASK) == 0);
- for (i = start, j = start % count ; i < end ; j++, i++) {
- if ( j == count ) {
- i += skip;
- j = 0;
- }
- PGCACHE_WRLOCK(inode->i_mapping);
- if (list_empty(&inode->i_mapping->dirty_pages) &&
- list_empty(&inode->i_mapping->clean_pages) &&
- list_empty(&inode->i_mapping->locked_pages)) {
- CDEBUG(D_INODE, "nothing left\n");
- PGCACHE_WRUNLOCK(inode->i_mapping);
- break;
- }
- PGCACHE_WRUNLOCK(inode->i_mapping);
- if (need_resched())
- schedule();
- page = find_get_page(inode->i_mapping, i);
- if (page == NULL)
- continue;
- CDEBUG(D_INODE, "dropping page %p at %lu\n", page, page->index);
- lock_page(page);
- if (page->mapping) /* might have raced */
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
- truncate_complete_page(page);
-#else
- truncate_complete_page(page->mapping, page);
-#endif
- unlock_page(page);
- page_cache_release(page);
- }
- EXIT;
-#endif
-}
+size_t llap_cookie_size;
-int llu_lock_callback(struct ldlm_lock *lock, struct ldlm_lock_desc *new,
- void *data, int flag)
+static int llu_lock_to_stripe_offset(struct inode *inode, struct ldlm_lock *lock)
{
- struct inode *inode = data;
struct llu_inode_info *lli = llu_i2info(inode);
- struct lustre_handle lockh = {0};
+ struct lov_stripe_md *lsm = lli->lli_smd;
+ struct obd_export *exp = llu_i2obdexp(inode);
+ struct {
+ char name[16];
+ struct ldlm_lock *lock;
+ } key = { .name = KEY_LOCK_TO_STRIPE, .lock = lock };
+ __u32 stripe, vallen = sizeof(stripe);
int rc;
ENTRY;
- if (inode == NULL)
- LBUG();
+ if (lsm->lsm_stripe_count == 1)
+ RETURN(0);
- 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: {
- /* FIXME: we could be given 'canceling intents' so that we
- * could know to write-back or simply throw away the pages
- * based on if the cancel comes from a desire to, say,
- * read or truncate.. */
- llu_pgcache_remove_extent(inode, lli->lli_smd, lock);
- break;
- }
- default:
+ /* get our offset in the lov */
+ rc = obd_get_info(exp, sizeof(key), &key, &vallen, &stripe, lsm);
+ if (rc != 0) {
+ CERROR("obd_get_info: rc = %d\n", rc);
LBUG();
}
-
- RETURN(0);
+ LASSERT(stripe < lsm->lsm_stripe_count);
+ RETURN(stripe);
}
-#endif
-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;
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);
CERROR("ldlm_cli_cancel failed: %d\n", rc);
break;
case LDLM_CB_CANCELING: {
- struct inode *inode = llu_inode_from_lock(lock);
+ 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) {
- I_RELE(inode);
- RETURN(0);
- }
- if (!lli->lli_smd) {
- I_RELE(inode);
- RETURN(0);
- }
-
-/*
- ll_pgcache_remove_extent(inode, lli->lli_smd, lock);
- iput(inode);
-*/
+ if (!lli)
+ goto iput;
+ if (!lli->lli_smd)
+ goto iput;
+ 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);
+ 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);
+ loi_kms_set(lsm->lsm_oinfo[stripe], kms);
+iput:
I_RELE(inode);
break;
}
default:
LBUG();
}
-
+
RETURN(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)
+static int llu_glimpse_callback(struct ldlm_lock *lock, void *reqp)
{
- struct llu_sb_info *sbi = llu_i2sbi(inode);
- struct llu_inode_info *lli = llu_i2info(inode);
- int rc;
+ struct ptlrpc_request *req = reqp;
+ struct inode *inode = llu_inode_from_lock(lock);
+ struct llu_inode_info *lli;
+ struct ost_lvb *lvb;
+ int rc, stripe = 0;
ENTRY;
- LASSERT(lockh->cookie == 0);
+ 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);
+
+ 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("failed pack reply: %d\n", rc);
+ GOTO(iput, rc);
+ }
-#if 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);
-#endif
+ 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: "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, 1, NULL, NULL);
+
+ req->rq_status = rc;
+ return rc;
+}
- CDEBUG(D_DLMTRACE, "Locking inode %lu, start "LPU64" end "LPU64"\n",
- lli->lli_st_ino, extent->start, extent->end);
+int llu_merge_lvb(struct inode *inode)
+{
+ struct llu_inode_info *lli = llu_i2info(inode);
+ struct llu_sb_info *sbi = llu_i2sbi(inode);
+ struct intnl_stat *st = llu_i2stat(inode);
+ struct ost_lvb lvb;
+ int rc;
+ ENTRY;
- rc = obd_enqueue(sbi->ll_osc_exp, lsm, NULL, LDLM_EXTENT, extent,
- sizeof(extent), mode, &ast_flags,
- llu_extent_lock_callback, inode, lockh);
+ 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;
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)
+ ldlm_policy_data_t *policy, struct lustre_handle *lockh,
+ int ast_flags)
{
- 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;
+ struct llu_sb_info *sbi = llu_i2sbi(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;
- rc = llu_extent_lock_no_validate(fd, inode, lsm, mode, extent, lockh, 0);
- if (rc != ELDLM_OK)
- RETURN(rc);
+ LASSERT(!lustre_handle_is_used(lockh));
+ CLASSERT(ELDLM_OK == 0);
- if (test_bit(LLI_F_HAVE_OST_SIZE_LOCK, &lli->lli_flags))
+ /* 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) || mode == LCK_NL)
RETURN(0);
- rc = llu_inode_getattr(inode, lsm);
- if (rc) {
- llu_extent_unlock(fd, inode, lsm, mode, lockh);
- RETURN(rc);
+ CDEBUG(D_DLMTRACE, "Locking inode "LPU64", start "LPU64" end "LPU64"\n",
+ (__u64)st->st_ino, policy->l_extent.start,
+ policy->l_extent.end);
+
+ einfo.ei_type = LDLM_EXTENT;
+ einfo.ei_mode = mode;
+ einfo.ei_cb_bl = llu_extent_lock_cancel_cb;
+ einfo.ei_cb_cp = ldlm_completion_ast;
+ einfo.ei_cb_gl = llu_glimpse_callback;
+ einfo.ei_cbdata = inode;
+
+ oinfo.oi_policy = *policy;
+ oinfo.oi_lockh = lockh;
+ oinfo.oi_md = lsm;
+ oinfo.oi_flags = ast_flags;
+
+ rc = obd_enqueue(sbi->ll_dt_exp, &oinfo, &einfo, NULL);
+ *policy = oinfo.oi_policy;
+ if (rc > 0)
+ rc = -EIO;
+
+ 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;
+
+ if (rc == 0) {
+ st->st_mtime = lvb.lvb_mtime;
+ st->st_atime = lvb.lvb_atime;
+ st->st_ctime = lvb.lvb_ctime;
}
- size_lock.start = lli->lli_st_size;
- size_lock.end = OBD_OBJECT_EOF;
-
- /* XXX I bet we should be checking the lock ignore flags.. */
- 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);
+ RETURN(rc);
}
int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode,
struct llu_sb_info *sbi = llu_i2sbi(inode);
int rc;
ENTRY;
-#if 0
+
+ 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);
-#endif
- 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;
- }
- inode = llap->llap_inode;
- lsm = llu_i2info(inode)->lli_smd;
+ rc = obd_cancel(sbi->ll_dt_exp, lsm, mode, lockh);
- 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;
-
- 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, int rc)
-{
- struct ll_async_page *llap;
- struct page *page;
-
- llap = llap_from_cookie(data);
- if (IS_ERR(llap)) {
- EXIT;
- return;
- }
-
- 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",
- page, page->index, rc);
- }
- EXIT;
+ RETURN(rc);
}
-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 npages)
+ssize_t llu_file_prwv(const struct iovec *iovec, int iovlen,
+ _SYSIO_OFF_T pos, ssize_t len,
+ void *private)
{
- struct llu_sysio_cookie *cookie;
-
- OBD_ALLOC(cookie, LLU_SYSIO_COOKIE_SIZE(npages));
- if (cookie) {
- I_REF(inode);
- cookie->lsc_inode = inode;
- cookie->lsc_npages = npages;
- cookie->lsc_llap = (struct ll_async_page *)(cookie + 1);
- cookie->lsc_pages = (struct page *) (cookie->lsc_llap + npages);
+ struct llu_io_session *session = (struct llu_io_session *) private;
+ struct inode *inode = session->lis_inode;
+ struct llu_inode_info *lli = llu_i2info(inode);
+ int err;
+ struct lu_env *env;
+ struct cl_io *io;
+ struct slp_io *sio;
+ int refcheck;
+ ENTRY;
- osic_init(&cookie->lsc_osic);
- }
+ /* in a large iov read/write we'll be repeatedly called.
+ * so give a chance to answer cancel ast here
+ */
+ liblustre_wait_event(0);
- return cookie;
-}
+ if (len == 0 || iovlen == 0)
+ RETURN(0);
-static
-void put_sysio_cookie(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);
- struct ll_async_page *llap = cookie->lsc_llap;
- int i;
-
- for (i = 0; i< cookie->lsc_npages; i++) {
- if (llap[i].llap_cookie)
- obd_teardown_async_page(exp, lsm, NULL,
- llap[i].llap_cookie);
+ if (pos + len > lli->lli_maxbytes)
+ RETURN(-ERANGE);
+
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
+
+ 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);
- I_RELE(cookie->lsc_inode);
+ if (err < 0)
+ RETURN(err);
- osic_release(cookie->lsc_osic);
- OBD_FREE(cookie, LLU_SYSIO_COOKIE_SIZE(cookie->lsc_npages));
+ RETURN(len);
}
static
-int llu_prep_async_io(struct llu_sysio_cookie *cookie, int cmd,
- char *buf, loff_t pos, size_t count)
+struct llu_io_session *get_io_session(struct inode *ino, int ngroups, int cmd)
{
- struct lov_stripe_md *lsm = llu_i2info(cookie->lsc_inode)->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;
+ struct llu_io_session *session;
- if (!exp)
- RETURN(-EINVAL);
-
- cookie->lsc_rwcount = count;
-
- /* 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;
-
- /* 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;
- } while (count);
-
- 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_sync_io(exp, lsm, NULL, cookie->lsc_osic,
- llap[i].llap_cookie, cmd,
- pages[i]._offset, pages[i]._count, 0);
- if (rc)
- RETURN(rc);
-
- llap[i].llap_queued = 1;
- }
+ OBD_ALLOC_PTR(session);
+ if (!session)
+ return NULL;
- RETURN(0);
+ I_REF(ino);
+ session->lis_inode = ino;
+ session->lis_max_groups = ngroups;
+ session->lis_cmd = cmd;
+ return session;
}
-static
-int llu_start_async_io(struct llu_sysio_cookie *cookie)
+static void put_io_session(struct llu_io_session *session)
{
- struct lov_stripe_md *lsm = llu_i2info(cookie->lsc_inode)->lli_smd;
- struct obd_export *exp = llu_i2obdexp(cookie->lsc_inode);
-
- return obd_trigger_sync_io(exp, lsm, NULL, cookie->lsc_osic);
+ I_RELE(session->lis_inode);
+ OBD_FREE_PTR(session);
}
-/*
- * 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)
+static int llu_file_rwx(struct inode *ino,
+ struct ioctx *ioctx,
+ int read)
{
- struct llu_sysio_cookie *cookie;
- int max_pages, rc;
+ struct llu_io_session *session;
+ ssize_t cc;
+ int cmd = read ? OBD_BRW_READ : OBD_BRW_WRITE;
ENTRY;
- max_pages = (count >> PAGE_SHIFT) + 2;
+ LASSERT(ioctx->ioctx_xtvlen >= 0);
+ LASSERT(ioctx->ioctx_iovlen >= 0);
- cookie = get_sysio_cookie(inode, max_pages);
- if (!cookie)
- RETURN(ERR_PTR(-ENOMEM));
+ liblustre_wait_event(0);
- 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);
+ if (!ioctx->ioctx_xtvlen)
+ RETURN(0);
-/*
- rc = osic_wait(&osic);
- if (rc) {
- CERROR("file i/o error!\n");
- rw_count = rc;
+ /* 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(cookie);
-out_cleanup:
- put_sysio_cookie(cookie);
- RETURN(ERR_PTR(rc));
+ liblustre_wait_event(0);
+ RETURN(cc);
}
-struct llu_sysio_callback_args*
-llu_file_write(struct inode *inode, const struct iovec *iovec,
- size_t iovlen, loff_t pos)
+void llu_io_init(struct cl_io *io, struct inode *inode, int write)
{
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 llu_sysio_callback_args *lsca;
- struct llu_sysio_cookie *cookie;
- struct ldlm_extent extent;
- ldlm_error_t err;
- int iovidx;
- ENTRY;
- /* XXX consider other types later */
- if (!S_ISREG(lli->lli_st_mode))
- LBUG();
+ memset(io, 0, sizeof *io);
- LASSERT(iovlen <= MAX_IOVEC);
-
- 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 = iovec[iovidx].iov_base;
- size_t count = iovec[iovidx].iov_len;
-
- if (count == 0)
- continue;
-
- /* FIXME libsysio haven't consider the open flags
- * such as O_APPEND */
-#if 0
- if (!S_ISBLK(lli->lli_st_mode) && file->f_flags & O_APPEND) {
- extent.start = 0;
- extent.end = OBD_OBJECT_EOF;
- } else {
- extent.start = *ppos;
- extent.end = *ppos + count - 1;
- }
-#else
- extent.start = pos;
- extent.end = pos + count - 1;
-#endif
+ 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;
- err = llu_extent_lock(fd, inode, lsm, LCK_PW, &extent, &lockh);
- 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;
- /* file size grow. XXX should be done here? */
- if (pos > lli->lli_st_size) {
- lli->lli_st_size = pos;
- set_bit(LLI_F_PREFER_EXTENDED_SIZE,
- &lli->lli_flags);
- }
- } 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);
- }
-
- 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));
+ if ((lli->lli_open_flags & O_APPEND) && write)
+ io->ci_lockreq = CILR_MANDATORY;
+ else
+ io->ci_lockreq = CILR_NEVER;
}
-#if 0
-static void llu_update_atime(struct inode *inode)
+int llu_iop_read(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;
+ /* BUG: 5972 */
+ st->st_atime = 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_info(env)->cti_io;
+ llu_io_init(io, ino, 0);
- /* 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, 1);
+
+ 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_write(struct inode *ino,
+ 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 };
- struct ldlm_extent extent;
- struct llu_sysio_callback_args *lsca;
- struct llu_sysio_cookie *cookie;
- int iovidx;
+ struct intnl_stat *st = llu_i2stat(ino);
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
+ int ret;
- ldlm_error_t err;
- ENTRY;
+ st->st_mtime = st->st_ctime = CFS_CURRENT_TIME;
- 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;
-
- extent.start = pos;
- extent.end = pos + count - 1;
-
- err = llu_extent_lock(fd, inode, lsm, LCK_PR, &extent, &lockh);
- if (err != ELDLM_OK)
- GOTO(err_out, err = -ENOLCK);
-
- CDEBUG(D_INFO, "Reading inode %lu, "LPSZ" bytes, offset %Ld\n",
- lli->lli_st_ino, count, pos);
-
- 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);
+ env = cl_env_get(&refcheck);
+ if (IS_ERR(env))
+ RETURN(PTR_ERR(env));
-err_out:
- /* teardown all async stuff */
- while (lsca->ncookies--) {
- put_sysio_cookie(lsca->cookies[lsca->ncookies]);
- }
- OBD_FREE(lsca, sizeof(*lsca));
+ io = &ccc_env_info(env)->cti_io;
+ llu_io_init(io, ino, 1);
- RETURN(ERR_PTR(err));
+ ret = llu_file_rwx(ino, ioctx, 0);
+ cl_env_put(env, &refcheck);
+ return ret;
}
-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;
- int i, err = 0, rc = 0;
+ struct llu_io_session *session;
+ struct lu_env *env;
+ struct cl_io *io;
+ int refcheck;
ENTRY;
- /* write/read(fd, buf, 0) */
- if (!lsca)
- return 1;
-
- LASSERT(!IS_ERR(lsca));
-
- for (i = 0; i < lsca->ncookies; i++) {
- cookie = lsca->cookies[i];
- if (cookie) {
- err = osic_wait(cookie->lsc_osic);
- if (err && !rc)
- rc = err;
- if (!rc)
- ioctxp->ioctx_cc += cookie->lsc_rwcount;
- put_sysio_cookie(cookie);
- }
+ 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;
}
- if (rc)
- ioctxp->ioctx_cc = 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