/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2001 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 #include #include #define LUSTRE_MDS_NAME "mds" 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. In le32 order. */ struct mds_server_data { __u8 msd_uuid[37]; /* server UUID */ __u8 uuid_padding[3]; /* unused */ __u64 msd_last_rcvd; /* 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_last_rcvd; /* last completed transaction ID */ __u64 mcd_mount_count; /* MDS incarnation number */ __u32 mcd_last_xid; /* client RPC xid for the last transaction */ __u8 padding[MDS_LR_SIZE - 60]; }; /* In-memory access to client data from MDS struct */ struct mds_client_info { struct list_head mci_list; struct list_head mci_open_head; struct mds_client_data *mci_mcd; int mci_off; }; /* file data for open files on MDS */ struct mds_file_data { struct list_head mfd_list; struct file * mfd_file; __u64 mfd_clientfd; __u32 mfd_clientcookie; }; /* mds/mds_reint.c */ int mds_reint_rec(struct mds_update_record *r, struct ptlrpc_request *req); struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid); /* 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); /* mdc/mdc_request.c */ int mdc_connect(struct ptlrpc_client *, struct ptlrpc_connection *, struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd, __u32 *last_xid, struct ptlrpc_request **); int mdc_getattr(struct ptlrpc_client *, struct ptlrpc_connection *, ino_t ino, int type, unsigned long valid, size_t ea_size, 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 cookie, __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); extern int mds_client_add(struct mds_obd *mds, struct mds_client_data *mcd, int cl_off); /* mds/mds_fs.c */ 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); int (* 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 file *file); int (* fs_set_last_rcvd)(struct mds_obd *mds, void *handle); }; extern int mds_register_fs_type(struct mds_fs_operations *op, const char *name); extern void mds_unregister_fs_type(const char *name); extern int mds_fs_setup(struct mds_obd *mds, struct vfsmount *mnt); extern void mds_fs_cleanup(struct mds_obd *mds); 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 int mds_fs_get_objid(struct mds_obd *mds, struct inode *inode, __u64 *id) { return 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); } /* Set up callback to update mds->mds_last_committed with the current * value of mds->mds_last_recieved when this transaction is on disk. */ static inline int mds_fs_set_last_rcvd(struct mds_obd *mds, void *handle) { return mds->mds_fsops->fs_set_last_rcvd(mds, handle); } /* Enable data journaling on the given file */ static inline ssize_t mds_fs_journal_data(struct mds_obd *mds, struct file *file) { return mds->mds_fsops->fs_journal_data(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 #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