+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * 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.
+ *
+ * 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
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * MDS data structures.
+ * See also lustre_idl.h for wire formats of requests.
+ *
+ */
+
#ifndef _LUSTRE_MDS_H
#define _LUSTRE_MDS_H
-#include <linux/obd_support.h>
+#ifdef __KERNEL__
+#include <linux/obd_class.h>
+#include <linux/lustre_idl.h>
+#include <linux/lustre_net.h>
-struct mds_run_ctxt {
- struct vfsmount *pwdmnt;
- struct dentry *pwd;
- mm_segment_t fs;
-};
+static inline void l_dput(struct dentry *de)
+{
+ if (!de || IS_ERR(de))
+ return;
+ shrink_dcache_parent(de);
+ dput(de);
+}
-#define MDS_UNMOUNT 1
#define LUSTRE_MDS_NAME "mds"
-struct mds_obd {
- char *mds_fstype;
- struct task_struct *mds_thread;
- wait_queue_head_t mds_waitq;
- wait_queue_head_t mds_done_waitq;
- struct timer_list *mds_timer;
- int mds_interval;
- int mds_flags;
- struct list_head mds_reqs;
- struct super_block * mds_sb;
- struct vfsmount *mds_vfsmnt;
- struct mds_run_ctxt mds_ctxt;
- spinlock_t mds_lock;
- __u64 mds_lastino;
- struct file_operations *mds_fop;
- struct inode_operations *mds_iop;
- struct address_space_operations *mds_aops;
+struct mds_update_record {
+ __u32 ur_opcode;
+ struct ll_fid *ur_fid1;
+ struct ll_fid *ur_fid2;
+ int ur_namelen;
+ char *ur_name;
+ int ur_tgtlen;
+ char *ur_tgt;
+ struct iattr ur_iattr;
+ __u64 ur_id;
+ __u32 ur_mode;
+ __u32 ur_uid;
+ __u32 ur_gid;
+ __u64 ur_time;
+};
+
+#define MDS_LR_CLIENT 8192
+#define MDS_LR_SIZE 128
+
+#define MDS_CLIENT_SLOTS 17
+
+#define MDS_MOUNT_RECOV 2
+
+/* Data stored per server at the head of the last_rcvd file */
+struct mds_server_data {
+ __u8 msd_uuid[37]; /* server UUID */
+ __u8 uuid_padding[3];
+ __u64 msd_last_rcvd; /* last completed transaction ID */
+ __u64 msd_mount_count; /* MDS incarnation number */
+ __u8 padding[512 - 56];
};
-#define MDS_GETATTR 1
-#define MDS_SETATTR 2
-#define MDS_OPEN 3
-#define MDS_CREATE 4
-#define MDS_LINK 5
-#define MDS_SYMLINK 6
-#define MDS_MKNOD 7
-#define MDS_MKDIR 8
-#define MDS_UNLINK 9
-#define MDS_RMDIR 10
-#define MDS_RENAME 11
-
-struct mds_request {
- struct list_head *rq_list;
- struct mds_obd *rq_obd;
- int rq_status;
-
- char *rq_reqbuf;
- int rq_reqlen;
- struct mds_req_hdr *rq_reqhdr;
- struct mds_req *rq_req;
-
- char *rq_repbuf;
- int rq_replen;
- struct mds_rep_hdr *rq_rephdr;
- struct mds_rep *rq_rep;
-
- wait_queue_head_t rq_wait_for_mds_rep;
+/* Data stored per client in the last_rcvd file */
+struct mds_client_data {
+ __u8 mcd_uuid[37]; /* client UUID */
+ __u8 uuid_padding[3]; /* in case we decide to store UUIDs as ASCII */
+ __u64 mcd_last_rcvd; /* last completed transaction ID */
+ __u64 mcd_mount_count; /* MDS incarnation number */
+ __u8 padding[MDS_LR_SIZE - 56];
};
+/* In-memory access to client data from MDS struct */
+struct mds_client_info {
+ struct list_head mci_list;
+ struct mds_client_data *mci_mcd;
+ loff_t mci_off;
+};
-/* mds/mds_pack.c */
-int mds_pack_req(char *name, int namelen, char *tgt, int tgtlen, struct mds_req_hdr **hdr, struct mds_req **req, int *len, char **buf);
-int mds_unpack_req(char *buf, int len, struct mds_req_hdr **hdr, struct mds_req **req);
-int mds_pack_rep(char *name, int namelen, char *tgt, int tgtlen, struct mds_rep_hdr **hdr, struct mds_rep **rep, int *len, char **buf);
-int mds_unpack_rep(char *buf, int len, struct mds_rep_hdr **hdr, struct mds_rep **rep);
+/* mds/mds_reint.c */
+int mds_reint_rec(struct mds_update_record *r, struct ptlrpc_request *req);
+
+/* lib/mds_updates.c */
+void mds_pack_req_body(struct ptlrpc_request *);
+void mds_pack_rep_body(struct ptlrpc_request *);
+void mds_unpack_req_body(struct ptlrpc_request *);
+void mds_unpack_rep_body(struct ptlrpc_request *);
+int mds_update_unpack(struct ptlrpc_request *, struct mds_update_record *);
+
+void mds_setattr_pack(struct mds_rec_setattr *, struct inode *, struct iattr *);
+void mds_create_pack(struct mds_rec_create *, struct inode *, __u32 mode,
+ __u64 id, __u32 uid, __u32 gid, __u64 time);
+void mds_unlink_pack(struct mds_rec_unlink *, struct inode *inode,
+ struct inode *child);
+void mds_link_pack(struct mds_rec_link *, struct inode *ino, struct inode *dir);
+void mds_rename_pack(struct mds_rec_rename *, struct inode *srcdir,
+ struct inode *tgtdir);
+
+/* mds/handler.c */
+struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt);
+
+/* llight/request.c */
+int mdc_connect(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct ll_fid *rootfid, struct ptlrpc_request **);
+int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
+ int type, unsigned long valid, struct ptlrpc_request **);
+int mdc_setattr(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct inode *, struct iattr *iattr, struct ptlrpc_request **);
+int mdc_open(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
+ int type, int flags, __u64 *fh, struct ptlrpc_request **req);
+int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
+ ino_t ino, int type, __u64 fh, struct ptlrpc_request **req);
+int mdc_readpage(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino,
+ int type, __u64 offset, char *addr, struct ptlrpc_request **);
+int mdc_create(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct inode *dir, const char *name, int namelen,
+ const char *tgt, int tgtlen,
+ int mode, __u64 id, __u32 uid, __u32 gid, __u64 time,
+ struct ptlrpc_request **);
+int mdc_unlink(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct inode *dir, struct inode *child, const char *name,
+ int namelen, struct ptlrpc_request **);
+int mdc_link(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct dentry *src, struct inode *dir, const char *name,
+ int namelen, struct ptlrpc_request **);
+int mdc_rename(struct ptlrpc_client *, struct ptlrpc_connection *,
+ struct inode *src, struct inode *tgt, const char *old,
+ int oldlen, const char *new, int newlen,
+ struct ptlrpc_request **);
+int mdc_create_client(char *uuid, struct ptlrpc_client *cl);
+
+struct mds_fs_operations {
+ void *(* fs_start)(struct inode *inode, int op);
+ int (* fs_commit)(struct inode *inode, void *handle);
+ int (* fs_setattr)(struct dentry *dentry, void *handle,
+ struct iattr *iattr);
+ int (* fs_set_objid)(struct inode *inode, void *handle, obd_id id);
+ void (* fs_get_objid)(struct inode *inode, obd_id *id);
+ ssize_t (* fs_readpage)(struct file *file, char *buf, size_t count,
+ loff_t *offset);
+ void (* fs_delete_inode)(struct inode *inode);
+ void (* cl_delete_inode)(struct inode *inode);
+ int (* fs_journal_data)(struct inode *inode, struct file *file);
+};
+#define MDS_FSOP_UNLINK 1
+#define MDS_FSOP_RMDIR 2
+#define MDS_FSOP_RENAME 3
+#define MDS_FSOP_CREATE 4
+#define MDS_FSOP_MKDIR 5
+#define MDS_FSOP_SYMLINK 6
+#define MDS_FSOP_MKNOD 7
+#define MDS_FSOP_SETATTR 8
+#define MDS_FSOP_LINK 9
+
+static inline void *mds_fs_start(struct mds_obd *mds, struct inode *inode,
+ int op)
+{
+ return mds->mds_fsops->fs_start(inode, op);
+}
+
+static inline int mds_fs_commit(struct mds_obd *mds, struct inode *inode,
+ void *handle)
+{
+ return mds->mds_fsops->fs_commit(inode, handle);
+}
+
+static inline int mds_fs_setattr(struct mds_obd *mds, struct dentry *dentry,
+ void *handle, struct iattr *iattr)
+{
+ /*
+ * NOTE: we probably don't need to take i_sem here when changing
+ * ATTR_SIZE because the MDS never needs to truncate a file.
+ * The ext2/ext3 code never truncates a directory, and files
+ * stored on the MDS are entirely sparse (no data blocks).
+ * If we do need to get it, we can do it here.
+ */
+ return mds->mds_fsops->fs_setattr(dentry, handle, iattr);
+}
+
+static inline int mds_fs_set_objid(struct mds_obd *mds, struct inode *inode,
+ void *handle, __u64 id)
+{
+ return mds->mds_fsops->fs_set_objid(inode, handle, id);
+}
+
+static inline void mds_fs_get_objid(struct mds_obd *mds, struct inode *inode,
+ __u64 *id)
+{
+ mds->mds_fsops->fs_get_objid(inode, id);
+}
+
+static inline ssize_t mds_fs_readpage(struct mds_obd *mds, struct file *file,
+ char *buf, size_t count, loff_t *offset)
+{
+ return mds->mds_fsops->fs_readpage(file, buf, count, offset);
+}
+
+static inline ssize_t mds_fs_journal_data(struct mds_obd *mds,
+ struct inode *inode,
+ struct file *file)
+{
+ return mds->mds_fsops->fs_journal_data(inode, file);
+}
+
+extern struct mds_fs_operations mds_ext2_fs_ops;
+extern struct mds_fs_operations mds_ext3_fs_ops;
+
+#endif /* __KERNEL__ */
+
+/* ioctls for trying requests */
+#define IOC_REQUEST_TYPE 'f'
+#define IOC_REQUEST_MIN_NR 30
+
+#define IOC_REQUEST_GETATTR _IOWR('f', 30, long)
+#define IOC_REQUEST_READPAGE _IOWR('f', 31, long)
+#define IOC_REQUEST_SETATTR _IOWR('f', 32, long)
+#define IOC_REQUEST_CREATE _IOWR('f', 33, long)
+#define IOC_REQUEST_OPEN _IOWR('f', 34, long)
+#define IOC_REQUEST_CLOSE _IOWR('f', 35, long)
+#define IOC_REQUEST_MAX_NR 35
#endif
-
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff