/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Lustre Light Super operations * * Copyright (c) 2002, 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. */ #ifndef __LLU_H_ #define __LLU_H_ #include #include #include #include #include #include #include #define PAGE_CACHE_MAXBYTES ((__u64)(~0UL) << PAGE_CACHE_SHIFT) struct ll_file_data { struct obd_client_handle fd_mds_och; __u32 fd_flags; }; struct llu_sb_info { struct obd_uuid ll_sb_uuid; struct obd_export *ll_mdc_exp; struct obd_export *ll_osc_exp; obd_id ll_rootino; int ll_flags; struct list_head ll_conn_chain; struct obd_uuid ll_mds_uuid; struct obd_uuid ll_mds_peer_uuid; char *ll_instance; }; #define LL_SBI_NOLCK 0x1 #define LL_SBI_READAHEAD 0x2 #define LLI_F_HAVE_OST_SIZE_LOCK 0 #define LLI_F_HAVE_MDS_SIZE_LOCK 1 #define LLI_F_PREFER_EXTENDED_SIZE 2 struct llu_inode_info { struct llu_sb_info *lli_sbi; struct ll_fid lli_fid; struct lov_stripe_md *lli_smd; char *lli_symlink_name; struct semaphore lli_open_sem; __u64 lli_maxbytes; unsigned long lli_flags; /* for libsysio */ struct file_identifier lli_sysio_fid; struct lookup_intent *lli_it; /* XXX workaround for libsysio unlink */ int lli_stale_flag; /* XXX workaround for libsysio readdir */ loff_t lli_dir_pos; /* in libsysio we have no chance to store data in file, * so place it here. since it's possible that an file * was opened several times without close, we track an * open_count here */ struct ll_file_data *lli_file_data; int lli_open_count; /* stat FIXME not 64 bit clean */ dev_t lli_st_dev; ino_t lli_st_ino; mode_t lli_st_mode; nlink_t lli_st_nlink; uid_t lli_st_uid; gid_t lli_st_gid; dev_t lli_st_rdev; loff_t lli_st_size; unsigned int lli_st_blksize; unsigned int lli_st_blocks; time_t lli_st_atime; time_t lli_st_mtime; time_t lli_st_ctime; /* not for stat, change it later */ int lli_st_flags; unsigned long lli_st_generation; }; #define LLU_SYSIO_COOKIE_SIZE(x) \ (sizeof(struct llu_sysio_cookie) + \ sizeof(struct ll_async_page) * (x) + \ sizeof(struct page) * (x)) struct llu_sysio_cookie { struct obd_io_group *lsc_oig; struct inode *lsc_inode; int lsc_maxpages; int lsc_npages; struct ll_async_page *lsc_llap; struct page *lsc_pages; __u64 lsc_rwcount; }; /* XXX why uio.h haven't the definition? */ #define MAX_IOVEC 32 struct llu_sysio_callback_args { int ncookies; struct llu_sysio_cookie *cookies[MAX_IOVEC]; }; static inline struct llu_sb_info *llu_fs2sbi(struct filesys *fs) { return (struct llu_sb_info*)(fs->fs_private); } static inline struct llu_inode_info *llu_i2info(struct inode *inode) { return (struct llu_inode_info*)(inode->i_private); } static inline struct llu_sb_info *llu_i2sbi(struct inode *inode) { return llu_i2info(inode)->lli_sbi; } static inline struct obd_export *llu_i2obdexp(struct inode *inode) { return llu_i2info(inode)->lli_sbi->ll_osc_exp; } static inline struct obd_export *llu_i2mdcexp(struct inode *inode) { return llu_i2info(inode)->lli_sbi->ll_mdc_exp; } static inline int llu_is_root_inode(struct inode *inode) { return (llu_i2info(inode)->lli_fid.id == llu_i2info(inode)->lli_sbi->ll_rootino); } #define LL_SAVE_INTENT(inode, it) \ do { \ struct lookup_intent *temp; \ LASSERT(llu_i2info(inode)->lli_it == NULL); \ OBD_ALLOC(temp, sizeof(*temp)); \ memcpy(temp, it, sizeof(*temp)); \ llu_i2info(inode)->lli_it = temp; \ CDEBUG(D_DENTRY, "alloc intent %p to inode %p(ino %lu)\n", \ temp, inode, llu_i2info(inode)->lli_st_ino); \ } while(0) #define LL_GET_INTENT(inode, it) \ do { \ it = llu_i2info(inode)->lli_it; \ \ LASSERT(it); \ llu_i2info(inode)->lli_it = NULL; \ CDEBUG(D_DENTRY, "dettach intent %p from inode %p(ino %lu)\n", \ it, inode, llu_i2info(inode)->lli_st_ino); \ } while(0) /* interpet return codes from intent lookup */ #define LL_LOOKUP_POSITIVE 1 #define LL_LOOKUP_NEGATIVE 2 static inline void ll_inode2fid(struct ll_fid *fid, struct inode *inode) { *fid = llu_i2info(inode)->lli_fid; } struct it_cb_data { struct inode *icbd_parent; struct pnode *icbd_child; obd_id hash; }; static inline void ll_i2uctxt(struct ll_uctxt *ctxt, struct inode *i1, struct inode *i2) { struct llu_inode_info *lli1 = llu_i2info(i1); struct llu_inode_info *lli2; LASSERT(i1); LASSERT(ctxt); if (in_group_p(lli1->lli_st_gid)) ctxt->gid1 = lli1->lli_st_gid; else ctxt->gid1 = -1; if (i2) { lli2 = llu_i2info(i2); if (in_group_p(lli2->lli_st_gid)) ctxt->gid2 = lli2->lli_st_gid; else ctxt->gid2 = -1; } else ctxt->gid2 = 0; } typedef int (*intent_finish_cb)(struct ptlrpc_request *, struct inode *parent, struct pnode *pnode, struct lookup_intent *, int offset, obd_id ino); int llu_intent_lock(struct inode *parent, struct pnode *pnode, struct lookup_intent *, int flags, intent_finish_cb); /* FIXME */ static inline int ll_permission(struct inode *inode, int flag, void * unused) { return 0; } static inline __u64 ll_file_maxbytes(struct inode *inode) { return llu_i2info(inode)->lli_maxbytes; } struct mount_option_s { char *mdc_uuid; char *osc_uuid; }; /* llite_lib.c */ void generate_random_uuid(unsigned char uuid_out[16]); int liblustre_process_log(struct config_llog_instance *cfg, int allow_recov); int ll_parse_mount_target(const char *target, char **mdsnid, char **mdsname, char **profile); extern int g_zconf; extern char *g_zconf_mdsnid; extern char *g_zconf_mdsname; extern char *g_zconf_profile; extern struct mount_option_s mount_option; /* super.c */ void llu_update_inode(struct inode *inode, struct mds_body *body, struct lov_stripe_md *lmm); void obdo_to_inode(struct inode *dst, struct obdo *src, obd_flag valid); void obdo_from_inode(struct obdo *dst, struct inode *src, obd_flag valid); int ll_it_open_error(int phase, struct lookup_intent *it); struct inode *llu_iget(struct filesys *fs, struct lustre_md *md); int llu_inode_getattr(struct inode *inode, struct lov_stripe_md *lsm); extern struct fssw_ops llu_fssw_ops; /* file.c */ void llu_prepare_mdc_op_data(struct mdc_op_data *data, struct inode *i1, struct inode *i2, const char *name, int namelen, int mode); int llu_create(struct inode *dir, struct pnode_base *pnode, int mode); int llu_iop_open(struct pnode *pnode, int flags, mode_t mode); int llu_mdc_close(struct obd_export *mdc_exp, struct inode *inode); int llu_iop_close(struct inode *inode); int llu_iop_ipreadv(struct inode *ino, struct ioctx *ioctxp); int llu_iop_ipwritev(struct inode *ino, struct ioctx *ioctxp); int llu_vmtruncate(struct inode * inode, loff_t offset); void obdo_refresh_inode(struct inode *dst, struct obdo *src, obd_flag valid); int llu_objects_destroy(struct ptlrpc_request *request, struct inode *dir); /* rw.c */ int llu_iop_iodone(struct ioctx *ioctxp __IS_UNUSED); struct llu_sysio_callback_args* llu_file_write(struct inode *inode, const struct iovec *iovec, size_t iovlen, loff_t pos); struct llu_sysio_callback_args* llu_file_read(struct inode *inode, const struct iovec *iovec, size_t iovlen, loff_t pos); int llu_glimpse_size(struct inode *inode, struct ost_lvb *lvb); int llu_extent_lock(struct ll_file_data *fd, struct inode *inode, struct lov_stripe_md *lsm, int mode, ldlm_policy_data_t *policy, struct lustre_handle *lockh, int ast_flags); int llu_extent_unlock(struct ll_file_data *fd, struct inode *inode, struct lov_stripe_md *lsm, int mode, struct lustre_handle *lockh); /* namei.c */ int llu_iop_lookup(struct pnode *pnode, struct inode **inop, struct intent *intnt, const char *path); void unhook_stale_inode(struct pnode *pno); struct inode *llu_inode_from_lock(struct ldlm_lock *lock); int llu_mdc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, void *data, int flag); /* dir.c */ ssize_t llu_iop_getdirentries(struct inode *ino, char *buf, size_t nbytes, _SYSIO_OFF_T *basep); /* ext2 related */ #define EXT2_NAME_LEN (255) struct ext2_dirent { __u32 inode; __u16 rec_len; __u8 name_len; __u8 file_type; char name[EXT2_NAME_LEN]; }; #define EXT2_DIR_PAD 4 #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ ~EXT2_DIR_ROUND) static inline struct ext2_dirent *ext2_next_entry(struct ext2_dirent *p) { return (struct ext2_dirent*)((char*) p + le16_to_cpu(p->rec_len)); } #endif