/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2001-2003 Cluster File Systems, Inc. * * 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 #ifdef __KERNEL__ #include #endif #include #include struct ldlm_lock_desc; struct mds_obd; struct ptlrpc_connection; struct ptlrpc_client; struct obd_export; struct ptlrpc_request; struct obd_device; struct ll_file_data; #define LUSTRE_MDS_NAME "mds" #define LUSTRE_MDT_NAME "mdt" #define LUSTRE_MDC_NAME "mdc" struct mdc_rpc_lock { struct semaphore rpcl_sem; struct lookup_intent *rpcl_it; }; extern struct mdc_rpc_lock mdc_rpc_lock; extern struct mdc_rpc_lock mdc_setattr_lock; static inline void mdc_init_rpc_lock(struct mdc_rpc_lock *lck) { sema_init(&lck->rpcl_sem, 1); lck->rpcl_it = NULL; } static inline void mdc_get_rpc_lock(struct mdc_rpc_lock *lck, struct lookup_intent *it) { down(&lck->rpcl_sem); if (it) { lck->rpcl_it = it; it->it_iattr = (void *)1; } } static inline void mdc_put_rpc_lock(struct mdc_rpc_lock *lck, struct lookup_intent *it) { if (it == NULL) { LASSERT(it == lck->rpcl_it); up(&lck->rpcl_sem); return; } if (it && it->it_iattr) { it->it_iattr = NULL; LASSERT(it == lck->rpcl_it); lck->rpcl_it = NULL; up(&lck->rpcl_sem); } } struct mdc_unlink_data { struct inode *unl_dir; struct inode *unl_de; int unl_mode; const char *unl_name; int unl_len; }; struct mds_update_record { __u32 ur_fsuid; __u32 ur_fsgid; __u32 ur_cap; __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_rdev; __u32 ur_mode; __u32 ur_uid; __u32 ur_gid; __u64 ur_time; __u32 ur_flags; __u32 ur_suppgid1; __u32 ur_suppgid2; }; #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. In le32 order. */ struct mds_server_data { __u8 msd_uuid[37]; /* server UUID */ __u8 uuid_padding[3]; /* unused */ __u64 msd_last_transno; /* last completed transaction ID */ __u64 msd_mount_count; /* MDS incarnation number */ __u8 padding[512 - 56]; }; /* Data stored per client in the last_rcvd file. In le32 order. */ struct mds_client_data { __u8 mcd_uuid[37]; /* client UUID */ __u8 uuid_padding[3]; /* unused */ __u64 mcd_mount_count; /* MDS incarnation number */ __u64 mcd_last_transno; /* last completed transaction ID */ __u64 mcd_last_xid; /* xid for the last transaction */ __u32 mcd_last_result; /* result from last RPC */ __u32 mcd_last_data; /* per-op data (disposition for open &c.) */ __u8 padding[MDS_LR_SIZE - 58]; }; /* In-memory access to client data from MDS struct */ struct mds_export_data { struct list_head med_open_head; spinlock_t med_open_lock; struct mds_client_data *med_mcd; int med_off; struct ptlrpc_request *med_outstanding_reply; }; /* file data for open files on MDS */ struct mds_file_data { struct list_head mfd_list; __u64 mfd_servercookie; __u64 mfd_xid; struct file *mfd_file; }; /* mds/mds_reint.c */ int mds_reint_rec(struct mds_update_record *r, int offset, struct ptlrpc_request *req, struct lustre_handle *); /* mds/mds_open.c */ int mds_open(struct mds_update_record *rec, int offset, struct ptlrpc_request *req, struct lustre_handle *); /* lib/mds_updates.c */ void mds_unpack_body(struct mds_body *b); void mds_unpack_fid(struct ll_fid *fid); void mds_pack_fid(struct ll_fid *fid); void mds_pack_req_body(struct ptlrpc_request *); void mds_pack_rep_body(struct ptlrpc_request *); int mds_update_unpack(struct ptlrpc_request *, int offset, struct mds_update_record *); void mds_readdir_pack(struct ptlrpc_request *req, __u64 offset, obd_id ino, int type, __u64 xid); void mds_getattr_pack(struct ptlrpc_request *req, int valid, int offset, int fl, struct inode *inode, const char *name, int namelen); void mds_setattr_pack(struct ptlrpc_request *, struct inode *, struct iattr *, void *ea, int ealen); void mds_create_pack(struct ptlrpc_request *, int offset, struct inode *dir, __u32 mode, __u64 rdev, __u32 uid, __u32 gid, __u64 time, const char *name, int namelen, const void *data, int datalen); void mds_open_pack(struct ptlrpc_request *, int offset, struct inode *dir, __u32 mode, __u64 rdev, __u32 uid, __u32 gid, __u64 time, __u32 flags, const char *name, int namelen, const void *data, int datalen); void mds_unlink_pack(struct ptlrpc_request *, int offset, struct inode *inode, struct inode *child, __u32 mode, const char *name, int namelen); void mds_link_pack(struct ptlrpc_request *, int offset, struct inode *ino, struct inode *dir, const char *name, int namelen); void mds_rename_pack(struct ptlrpc_request *, int offset, struct inode *srcdir, struct inode *tgtdir, const char *name, int namelen, const char *tgt, int tgtlen); void mds_pack_inode2fid(struct ll_fid *fid, struct inode *inode); void mds_pack_inode2body(struct mds_body *body, struct inode *inode); /* mds/handler.c */ struct dentry *mds_name2locked_dentry(struct obd_device *, struct dentry *dir, struct vfsmount **mnt, char *name, int namelen, int lock_mode, struct lustre_handle *lockh, int dir_lock_mode); struct dentry *mds_fid2locked_dentry(struct obd_device *obd, struct ll_fid *fid, struct vfsmount **mnt, int lock_mode, struct lustre_handle *lockh); struct dentry *mds_fid2dentry(struct mds_obd *mds, struct ll_fid *fid, struct vfsmount **mnt); int mds_reint(struct ptlrpc_request *req, int offset, struct lustre_handle *); int mds_pack_md(struct obd_device *mds, struct lustre_msg *msg, int offset, struct mds_body *body, struct inode *inode); void mds_steal_ack_locks(struct mds_export_data *med, struct ptlrpc_request *req); /* mds/mds_fs.c */ int mds_fs_setup(struct obd_device *obddev, struct vfsmount *mnt); int mds_fs_cleanup(struct obd_device *obddev); /* mdc/mdc_request.c */ int mdc_enqueue(struct lustre_handle *conn, int lock_type, struct lookup_intent *it, int lock_mode, struct inode *dir, struct dentry *de, struct lustre_handle *lockh, char *tgt, int tgtlen, void *data, int datalen); int mdc_cancel_unused(struct lustre_handle *conn, struct inode *, int flags); int mdc_getlovinfo(struct obd_device *obd, struct lustre_handle *mdc_connh, struct ptlrpc_request **request); int mdc_getstatus(struct lustre_handle *conn, struct ll_fid *rootfid); int mdc_getattr(struct lustre_handle *conn, obd_id ino, int type, unsigned long valid, unsigned int ea_size, struct ptlrpc_request **request); int mdc_getattr_name(struct lustre_handle *conn, struct inode *parent, char *filename, int namelen, unsigned long valid, unsigned int ea_size, struct ptlrpc_request **request); int mdc_setattr(struct lustre_handle *conn, struct inode *, struct iattr *iattr, void *ea, int ealen, struct ptlrpc_request **); int mdc_open(struct lustre_handle *conn, obd_id ino, int type, int flags, struct lov_mds_md *lmm, int lmm_size, struct lustre_handle *fh, struct ptlrpc_request **); void mdc_set_open_replay_data(struct ll_file_data *fd); int mdc_close(struct lustre_handle *conn, obd_id ino, int type, struct lustre_handle *fh, struct ptlrpc_request **req); int mdc_readpage(struct lustre_handle *conn, obd_id ino, int type, __u64 offset, char *addr, struct ptlrpc_request **); int mdc_create(struct lustre_handle *conn, struct inode *dir, const char *name, int namelen, const void *data, int datalen, int mode, __u32 uid, __u32 gid, __u64 time, __u64 rdev, struct ptlrpc_request **); int mdc_unlink(struct lustre_handle *, struct inode *dir, struct inode *child, __u32 mode, const char *name, int namelen, struct ptlrpc_request **); int mdc_link(struct lustre_handle *conn, struct inode *src, struct inode *dir, const char *name, int namelen, struct ptlrpc_request **); int mdc_rename(struct lustre_handle *conn, struct inode *src, struct inode *tgt, const char *old, int oldlen, const char *new, int newlen, struct ptlrpc_request **); int mdc_create_client(struct obd_uuid uuid, struct ptlrpc_client *cl); void mdc_lock_set_inode(struct lustre_handle *lock, struct inode *inode); /* Store the generation of a newly-created inode in |req| for replay. */ void mdc_store_inode_generation(struct ptlrpc_request *req, int reqoff, int repoff); int mds_client_add(struct mds_obd *mds, struct mds_export_data *med, int cl_off); int mds_client_free(struct obd_export *exp); /* 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 #define MDS_CHECK_RESENT(req, reconstruct) \ { \ if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT) { \ struct mds_client_data *mcd = \ req->rq_export->exp_mds_data.med_mcd; \ if (mcd->mcd_last_xid == req->rq_xid) { \ reconstruct; \ RETURN(0); \ } \ DEBUG_REQ(D_HA, req, "no reply for RESENT req (have "LPD64")", \ mcd->mcd_last_xid); \ } \ } #endif