*
* Copyright (c) 2003 Cluster File Systems, Inc.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This file is part of the Lustre file system, http://www.lustre.org
+ * Lustre is a trademark of Cluster File Systems, Inc.
*
- * 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 may have signed or agreed to another license before downloading
+ * this software. If so, you are bound by the terms and conditions
+ * of that agreement, and the following does not apply to you. See the
+ * LICENSE file included with this distribution for more information.
*
- * 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.
+ * If you did not agree to a different license, then this copy of Lustre
+ * is open source 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
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * In either case, 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
+ * license text for more details.
*/
-#define DEBUG_SUBSYSTEM S_MDS
+#define DEBUG_SUBSYSTEM S_MDC
#ifndef __KERNEL__
# include <fcntl.h>
# include <liblustre.h>
#endif
-#include <linux/lustre_idl.h>
-#include <linux/lustre_net.h>
-#include <linux/lustre_mds.h>
+#include <lustre/lustre_idl.h>
+#include <lustre_net.h>
#include "mdc_internal.h"
#ifndef __KERNEL__
#endif
#endif
-void mdc_readdir_pack(struct ptlrpc_request *req, __u64 offset, __u32 size,
- struct ll_fid *mdc_fid)
+static void mdc_pack_body(struct mdt_body *b)
{
- struct mds_body *b;
+ LASSERT (b != NULL);
- b = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*b));
b->fsuid = current->fsuid;
b->fsgid = current->fsgid;
b->capability = current->cap_effective;
- b->fid1 = *mdc_fid;
- b->size = offset; /* !! */
- b->suppgid = -1;
- b->nlink = size; /* !! */
}
-static void mdc_pack_body(struct mds_body *b)
+void mdc_pack_capa(struct ptlrpc_request *req, int offset, struct obd_capa *oc)
{
- LASSERT (b != NULL);
+ struct lustre_capa *c;
- b->fsuid = current->fsuid;
- b->fsgid = current->fsgid;
- b->capability = current->cap_effective;
+ if (oc == NULL) {
+ LASSERT(lustre_msg_buflen(req->rq_reqmsg, offset) == 0);
+ return;
+ }
+
+ c = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*c));
+ LASSERT(c != NULL);
+ capa_cpy(c, oc);
+ DEBUG_CAPA(D_SEC, c, "pack");
+}
+
+void mdc_is_subdir_pack(struct ptlrpc_request *req, int offset,
+ const struct lu_fid *pfid,
+ const struct lu_fid *cfid, int flags)
+{
+ struct mdt_body *b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+
+ if (pfid)
+ b->fid1 = *pfid;
+ if (cfid)
+ b->fid2 = *cfid;
+ b->valid = OBD_MD_FLID;
+ b->flags = flags;
}
-void mdc_pack_req_body(struct ptlrpc_request *req)
+void mdc_pack_req_body(struct ptlrpc_request *req, int offset,
+ __u64 valid, const struct lu_fid *fid,
+ struct obd_capa *oc, int ea_size, int flags)
{
- struct mds_body *b = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*b));
+ struct mdt_body *b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+
+ b->valid = valid;
+ b->eadatasize = ea_size;
+ b->flags = flags;
+ mdc_pack_body(b);
+ if (fid) {
+ b->fid1 = *fid;
+ mdc_pack_capa(req, offset + 1, oc);
+ }
+}
+
+void mdc_readdir_pack(struct ptlrpc_request *req, int offset, __u64 pgoff,
+ __u32 size, const struct lu_fid *fid, struct obd_capa *oc)
+{
+ struct mdt_body *b;
+
+ b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*b));
+ b->fid1 = *fid;
+ b->size = pgoff; /* !! */
+ b->suppgid = -1;
+ b->nlink = size; /* !! */
mdc_pack_body(b);
+ mdc_pack_capa(req, offset + 1, oc);
}
/* packing of MDS records */
void mdc_create_pack(struct ptlrpc_request *req, int offset,
- struct mdc_op_data *op_data, __u32 mode, __u64 rdev,
- const void *data, int datalen)
+ struct md_op_data *op_data, const void *data, int datalen,
+ __u32 mode, __u32 uid, __u32 gid, __u32 cap_effective,
+ __u64 rdev)
{
- struct mds_rec_create *rec;
+ struct mdt_rec_create *rec;
char *tmp;
- rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
+
+ rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*rec));
rec->cr_opcode = REINT_CREATE;
- rec->cr_fsuid = current->fsuid;
- rec->cr_fsgid = current->fsgid;
- rec->cr_cap = current->cap_effective;
- rec->cr_fid = op_data->fid1;
- memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
+ rec->cr_fsuid = uid;
+ rec->cr_fsgid = gid;
+ rec->cr_cap = cap_effective;
+ rec->cr_fid1 = op_data->op_fid1;
+ rec->cr_fid2 = op_data->op_fid2;
rec->cr_mode = mode;
rec->cr_rdev = rdev;
- rec->cr_time = op_data->mod_time;
- rec->cr_suppgid = op_data->ctxt.gid1;
+ rec->cr_time = op_data->op_mod_time;
+ rec->cr_suppgid1 = op_data->op_suppgids[0];
+ rec->cr_suppgid2 = op_data->op_suppgids[1];
+ rec->cr_flags = op_data->op_flags & ~MF_SOM_LOCAL_FLAGS;
+ rec->cr_bias = op_data->op_bias;
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1, op_data->namelen + 1);
- LOGL0(op_data->name, op_data->namelen, tmp);
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, op_data->op_namelen + 1);
+ LOGL0(op_data->op_name, op_data->op_namelen, tmp);
if (data) {
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, datalen);
- memcpy (tmp, data, datalen);
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, datalen);
+ memcpy(tmp, data, datalen);
}
}
static __u32 mds_pack_open_flags(__u32 flags)
{
return
- (flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC |
+ (flags & (FMODE_READ | FMODE_WRITE |
MDS_OPEN_DELAY_CREATE | MDS_OPEN_HAS_EA |
- MDS_OPEN_HAS_OBJS)) |
+ MDS_OPEN_HAS_OBJS | MDS_OPEN_OWNEROVERRIDE |
+ MDS_OPEN_LOCK)) |
((flags & O_CREAT) ? MDS_OPEN_CREAT : 0) |
((flags & O_EXCL) ? MDS_OPEN_EXCL : 0) |
((flags & O_TRUNC) ? MDS_OPEN_TRUNC : 0) |
((flags & O_APPEND) ? MDS_OPEN_APPEND : 0) |
((flags & O_SYNC) ? MDS_OPEN_SYNC : 0) |
((flags & O_DIRECTORY) ? MDS_OPEN_DIRECTORY : 0) |
+ ((flags & O_JOIN_FILE) ? MDS_OPEN_JOIN_FILE : 0) |
+#ifdef FMODE_EXEC
+ ((flags & FMODE_EXEC) ? MDS_FMODE_EXEC : 0) |
+#endif
0;
}
/* packing of MDS records */
+void mdc_join_pack(struct ptlrpc_request *req, int offset,
+ struct md_op_data *op_data, __u64 head_size)
+{
+ struct mdt_rec_join *rec;
+
+ rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*rec));
+ LASSERT(rec != NULL);
+ rec->jr_fid = op_data->op_fid2;
+ rec->jr_headsize = head_size;
+}
+
void mdc_open_pack(struct ptlrpc_request *req, int offset,
- struct mdc_op_data *op_data, __u32 mode, __u64 rdev,
+ struct md_op_data *op_data, __u32 mode, __u64 rdev,
__u32 flags, const void *lmm, int lmmlen)
{
- struct mds_rec_create *rec;
+ struct mdt_rec_create *rec;
char *tmp;
rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
rec->cr_fsuid = current->fsuid;
rec->cr_fsgid = current->fsgid;
rec->cr_cap = current->cap_effective;
- if (op_data != NULL)
- rec->cr_fid = op_data->fid1;
- memset(&rec->cr_replayfid, 0, sizeof(rec->cr_replayfid));
+ if (op_data != NULL) {
+ rec->cr_fid1 = op_data->op_fid1;
+ rec->cr_fid2 = op_data->op_fid2;
+ }
rec->cr_mode = mode;
rec->cr_flags = mds_pack_open_flags(flags);
+ rec->cr_time = op_data->op_mod_time;
rec->cr_rdev = rdev;
- rec->cr_time = op_data->mod_time;
- rec->cr_suppgid = op_data->ctxt.gid1;
-
- if (op_data->name) {
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1,
- op_data->namelen + 1);
- LOGL0(op_data->name, op_data->namelen, tmp);
+ rec->cr_suppgid1 = op_data->op_suppgids[0];
+ rec->cr_suppgid2 = op_data->op_suppgids[1];
+ rec->cr_bias = op_data->op_bias;
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+ /* the next buffer is child capa, which is used for replay,
+ * will be packed from the data in reply message. */
+
+ if (op_data->op_name) {
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3,
+ op_data->op_namelen + 1);
+ LOGL0(op_data->op_name, op_data->op_namelen, tmp);
}
if (lmm) {
rec->cr_flags |= MDS_OPEN_HAS_EA;
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, lmmlen);
+#ifndef __KERNEL__
+ /*XXX a hack for liblustre to set EA (LL_IOC_LOV_SETSTRIPE) */
+ rec->cr_fid2 = op_data->op_fid2;
+#endif
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 4, lmmlen);
memcpy (tmp, lmm, lmmlen);
}
}
-void mdc_setattr_pack(struct ptlrpc_request *req, struct mdc_op_data *data,
- struct iattr *iattr, void *ea, int ealen,
- void *ea2, int ea2len)
+static void mdc_setattr_pack_rec(struct mdt_rec_setattr *rec,
+ struct md_op_data *op_data)
{
- struct mds_rec_setattr *rec = lustre_msg_buf(req->rq_reqmsg, 0,
- sizeof (*rec));
rec->sa_opcode = REINT_SETATTR;
rec->sa_fsuid = current->fsuid;
rec->sa_fsgid = current->fsgid;
rec->sa_cap = current->cap_effective;
- rec->sa_fid = data->fid1;
-
- if (iattr) {
- rec->sa_valid = iattr->ia_valid;
- rec->sa_mode = iattr->ia_mode;
- rec->sa_uid = iattr->ia_uid;
- rec->sa_gid = iattr->ia_gid;
- rec->sa_size = iattr->ia_size;
- rec->sa_atime = LTIME_S(iattr->ia_atime);
- rec->sa_mtime = LTIME_S(iattr->ia_mtime);
- rec->sa_ctime = LTIME_S(iattr->ia_ctime);
- rec->sa_attr_flags = iattr->ia_attr_flags;
- if ((iattr->ia_valid & ATTR_GID) && in_group_p(iattr->ia_gid))
- rec->sa_suppgid = iattr->ia_gid;
- else if ((iattr->ia_valid & ATTR_MODE) &&
- in_group_p(iattr->ia_gid))
- rec->sa_suppgid = data->ctxt.gid1;
- else if ((iattr->ia_valid & (ATTR_MTIME|ATTR_CTIME)) &&
- data->ctxt.gid1 != -1)
- rec->sa_suppgid = data->ctxt.gid1;
+ rec->sa_suppgid = -1;
+
+ rec->sa_fid = op_data->op_fid1;
+ rec->sa_valid = op_data->op_attr.ia_valid;
+ rec->sa_mode = op_data->op_attr.ia_mode;
+ rec->sa_uid = op_data->op_attr.ia_uid;
+ rec->sa_gid = op_data->op_attr.ia_gid;
+ rec->sa_size = op_data->op_attr.ia_size;
+ rec->sa_blocks = op_data->op_attr_blocks;
+ rec->sa_atime = LTIME_S(op_data->op_attr.ia_atime);
+ rec->sa_mtime = LTIME_S(op_data->op_attr.ia_mtime);
+ rec->sa_ctime = LTIME_S(op_data->op_attr.ia_ctime);
+ rec->sa_attr_flags = ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags;
+ if ((op_data->op_attr.ia_valid & ATTR_GID) &&
+ in_group_p(op_data->op_attr.ia_gid))
+ rec->sa_suppgid = op_data->op_attr.ia_gid;
+ else
+ rec->sa_suppgid = op_data->op_suppgids[0];
+}
+
+static void mdc_epoch_pack(struct mdt_epoch *epoch, struct md_op_data *op_data)
+{
+ memcpy(&epoch->handle, &op_data->op_handle, sizeof(epoch->handle));
+ epoch->ioepoch = op_data->op_ioepoch;
+ epoch->flags = op_data->op_flags & ~MF_SOM_LOCAL_FLAGS;
+}
+
+void mdc_setattr_pack(struct ptlrpc_request *req, int offset,
+ struct md_op_data *op_data, void *ea,
+ int ealen, void *ea2, int ea2len)
+{
+ struct mdt_rec_setattr *rec;
+ struct mdt_epoch *epoch;
+
+ rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
+ mdc_setattr_pack_rec(rec, op_data);
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+
+ if (op_data->op_flags & (MF_SOM_CHANGE | MF_EPOCH_OPEN)) {
+ epoch = lustre_msg_buf(req->rq_reqmsg, offset + 2,
+ sizeof(*epoch));
+ mdc_epoch_pack(epoch, op_data);
}
if (ealen == 0)
return;
- memcpy(lustre_msg_buf(req->rq_reqmsg, 1, ealen), ea, ealen);
+ memcpy(lustre_msg_buf(req->rq_reqmsg, offset + 3, ealen), ea, ealen);
if (ea2len == 0)
return;
- memcpy(lustre_msg_buf(req->rq_reqmsg, 2, ea2len), ea2, ea2len);
+ memcpy(lustre_msg_buf(req->rq_reqmsg, offset + 4, ea2len), ea2, ea2len);
}
void mdc_unlink_pack(struct ptlrpc_request *req, int offset,
- struct mdc_op_data *data)
+ struct md_op_data *op_data)
{
- struct mds_rec_unlink *rec;
+ struct mdt_rec_unlink *rec;
char *tmp;
rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
LASSERT (rec != NULL);
rec->ul_opcode = REINT_UNLINK;
- rec->ul_fsuid = current->fsuid;
- rec->ul_fsgid = current->fsgid;
- rec->ul_cap = current->cap_effective;
- rec->ul_mode = data->create_mode;
- rec->ul_suppgid = data->ctxt.gid1;
- rec->ul_fid1 = data->fid1;
- rec->ul_fid2 = data->fid2;
- rec->ul_time = data->mod_time;
-
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1, data->namelen + 1);
- LASSERT (tmp != NULL);
- LOGL0(data->name, data->namelen, tmp);
+ rec->ul_fsuid = op_data->op_fsuid;//current->fsuid;
+ rec->ul_fsgid = op_data->op_fsgid;//current->fsgid;
+ rec->ul_cap = op_data->op_cap;//current->cap_effective;
+ rec->ul_mode = op_data->op_mode;
+ rec->ul_suppgid = op_data->op_suppgids[0];
+ rec->ul_fid1 = op_data->op_fid1;
+ rec->ul_fid2 = op_data->op_fid2;
+ rec->ul_time = op_data->op_mod_time;
+ rec->ul_bias = op_data->op_bias;
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, op_data->op_namelen + 1);
+ LASSERT(tmp != NULL);
+ LOGL0(op_data->op_name, op_data->op_namelen, tmp);
}
void mdc_link_pack(struct ptlrpc_request *req, int offset,
- struct mdc_op_data *data)
+ struct md_op_data *op_data)
{
- struct mds_rec_link *rec;
+ struct mdt_rec_link *rec;
char *tmp;
rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
rec->lk_opcode = REINT_LINK;
- rec->lk_fsuid = current->fsuid;
- rec->lk_fsgid = current->fsgid;
- rec->lk_cap = current->cap_effective;
- rec->lk_suppgid1 = data->ctxt.gid1;
- rec->lk_suppgid2 = data->ctxt.gid2;
- rec->lk_fid1 = data->fid1;
- rec->lk_fid2 = data->fid2;
- rec->lk_time = data->mod_time;
-
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1, data->namelen + 1);
- LOGL0(data->name, data->namelen, tmp);
+ rec->lk_fsuid = op_data->op_fsuid;//current->fsuid;
+ rec->lk_fsgid = op_data->op_fsgid;//current->fsgid;
+ rec->lk_cap = op_data->op_cap;//current->cap_effective;
+ rec->lk_suppgid1 = op_data->op_suppgids[0];
+ rec->lk_suppgid2 = op_data->op_suppgids[1];
+ rec->lk_fid1 = op_data->op_fid1;
+ rec->lk_fid2 = op_data->op_fid2;
+ rec->lk_time = op_data->op_mod_time;
+ rec->lk_bias = op_data->op_bias;
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+ mdc_pack_capa(req, offset + 2, op_data->op_capa2);
+
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, op_data->op_namelen + 1);
+ LOGL0(op_data->op_name, op_data->op_namelen, tmp);
}
void mdc_rename_pack(struct ptlrpc_request *req, int offset,
- struct mdc_op_data *data,
+ struct md_op_data *op_data,
const char *old, int oldlen, const char *new, int newlen)
{
- struct mds_rec_rename *rec;
+ struct mdt_rec_rename *rec;
char *tmp;
rec = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*rec));
/* XXX do something about time, uid, gid */
rec->rn_opcode = REINT_RENAME;
- rec->rn_fsuid = current->fsuid;
- rec->rn_fsgid = current->fsgid;
- rec->rn_cap = current->cap_effective;
- if (in_group_p(data->ctxt.gid1))
- rec->rn_suppgid1 = data->ctxt.gid1;
- else
- rec->rn_suppgid1 = -1;
- if (in_group_p(data->ctxt.gid2))
- rec->rn_suppgid2 = data->ctxt.gid2;
- else
- rec->rn_suppgid2 = -1;
- rec->rn_fid1 = data->fid1;
- rec->rn_fid2 = data->fid2;
- rec->rn_time = data->mod_time;
-
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1, oldlen + 1);
+ rec->rn_fsuid = op_data->op_fsuid;//current->fsuid;
+ rec->rn_fsgid = op_data->op_fsgid;//current->fsgid;
+ rec->rn_cap = op_data->op_cap;//current->cap_effective;
+ rec->rn_suppgid1 = op_data->op_suppgids[0];
+ rec->rn_suppgid2 = op_data->op_suppgids[1];
+ rec->rn_fid1 = op_data->op_fid1;
+ rec->rn_fid2 = op_data->op_fid2;
+ rec->rn_time = op_data->op_mod_time;
+ rec->rn_mode = op_data->op_mode;
+ rec->rn_bias = op_data->op_bias;
+
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+ mdc_pack_capa(req, offset + 2, op_data->op_capa2);
+
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 3, oldlen + 1);
LOGL0(old, oldlen, tmp);
if (new) {
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2, newlen + 1);
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 4, newlen + 1);
LOGL0(new, newlen, tmp);
}
}
-void mdc_getattr_pack(struct ptlrpc_request *req, int valid, int offset,
- int flags, struct mdc_op_data *data)
+void mdc_getattr_pack(struct ptlrpc_request *req, int offset, __u64 valid,
+ int flags, struct md_op_data *op_data)
{
- struct mds_body *b;
+ struct mdt_body *b;
b = lustre_msg_buf(req->rq_reqmsg, offset, sizeof (*b));
b->fsuid = current->fsuid;
b->fsgid = current->fsgid;
b->capability = current->cap_effective;
b->valid = valid;
- b->flags = flags;
- b->suppgid = data->ctxt.gid1;
+ if (op_data->op_bias & MDS_CHECK_SPLIT)
+ b->valid |= OBD_MD_FLCKSPLIT;
+ if (op_data->op_bias & MDS_CROSS_REF)
+ b->valid |= OBD_MD_FLCROSSREF;
+ b->flags = flags | MDS_BFLAG_EXT_FLAGS;
+ b->suppgid = op_data->op_suppgids[0];
+
+ b->fid1 = op_data->op_fid1;
+ b->fid2 = op_data->op_fid2;
- b->fid1 = data->fid1;
- if (data->name) {
+ mdc_pack_capa(req, offset + 1, op_data->op_capa1);
+
+ if (op_data->op_name) {
char *tmp;
- tmp = lustre_msg_buf(req->rq_reqmsg, offset + 1,
- data->namelen + 1);
- LOGL0(data->name, data->namelen, tmp);
+ tmp = lustre_msg_buf(req->rq_reqmsg, offset + 2,
+ op_data->op_namelen + 1);
+ LOGL0(op_data->op_name, op_data->op_namelen, tmp);
+ }
+}
+
+void mdc_close_pack(struct ptlrpc_request *req, int offset,
+ struct md_op_data *op_data)
+{
+ struct mdt_epoch *epoch;
+ struct mdt_rec_setattr *rec;
+
+ epoch = lustre_msg_buf(req->rq_reqmsg, offset, sizeof(*epoch));
+ rec = lustre_msg_buf(req->rq_reqmsg, offset + 1, sizeof(*rec));
+
+ mdc_setattr_pack_rec(rec, op_data);
+ mdc_pack_capa(req, offset + 2, op_data->op_capa1);
+ mdc_epoch_pack(epoch, op_data);
+}
+
+static int mdc_req_avail(struct client_obd *cli, struct mdc_cache_waiter *mcw)
+{
+ int rc;
+ ENTRY;
+ spin_lock(&cli->cl_loi_list_lock);
+ rc = list_empty(&mcw->mcw_entry);
+ spin_unlock(&cli->cl_loi_list_lock);
+ RETURN(rc);
+};
+
+/* We record requests in flight in cli->cl_r_in_flight here.
+ * There is only one write rpc possible in mdc anyway. If this to change
+ * in the future - the code may need to be revisited. */
+void mdc_enter_request(struct client_obd *cli)
+{
+ struct mdc_cache_waiter mcw;
+ struct l_wait_info lwi = { 0 };
+
+ spin_lock(&cli->cl_loi_list_lock);
+ if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
+ list_add_tail(&mcw.mcw_entry, &cli->cl_cache_waiters);
+ init_waitqueue_head(&mcw.mcw_waitq);
+ spin_unlock(&cli->cl_loi_list_lock);
+ l_wait_event(mcw.mcw_waitq, mdc_req_avail(cli, &mcw), &lwi);
+ } else {
+ cli->cl_r_in_flight++;
+ spin_unlock(&cli->cl_loi_list_lock);
}
}
+void mdc_exit_request(struct client_obd *cli)
+{
+ struct list_head *l, *tmp;
+ struct mdc_cache_waiter *mcw;
+
+ spin_lock(&cli->cl_loi_list_lock);
+ cli->cl_r_in_flight--;
+ list_for_each_safe(l, tmp, &cli->cl_cache_waiters) {
+
+ if (cli->cl_r_in_flight >= cli->cl_max_rpcs_in_flight) {
+ /* No free request slots anymore */
+ break;
+ }
+
+ mcw = list_entry(l, struct mdc_cache_waiter, mcw_entry);
+ list_del_init(&mcw->mcw_entry);
+ cli->cl_r_in_flight++;
+ wake_up(&mcw->mcw_waitq);
+ }
+ /* Empty waiting list? Decrease reqs in-flight number */
+
+ spin_unlock(&cli->cl_loi_list_lock);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff