/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2003 Cluster File Systems, Inc. * * This code is issued under the GNU General Public License. * See the file COPYING in this distribution */ #ifndef LLITE_INTERNAL_H #define LLITE_INTERNAL_H #include /* default to about 40meg of readahead on a given system. That much tied * up in 512k readahead requests serviced at 40ms each is about 1GB/s. */ #define SBI_DEFAULT_RA_MAX ((40 << 20) >> PAGE_CACHE_SHIFT) enum ra_stat { RA_STAT_HIT = 0, RA_STAT_MISS, RA_STAT_DISTANT_READPAGE, RA_STAT_MISS_IN_WINDOW, RA_STAT_FAILED_MATCH, RA_STAT_DISCARDED, RA_STAT_ZERO_LEN, RA_STAT_ZERO_WINDOW, RA_STAT_EOF, RA_STAT_MAX_IN_FLIGHT, _NR_RA_STAT, }; struct ll_ra_info { unsigned long ra_cur_pages; unsigned long ra_max_pages; unsigned long ra_stats[_NR_RA_STAT]; }; /* after roughly how long should we remove an inactive mount? */ #define GNS_MOUNT_TIMEOUT 120 /* how often should the GNS timer look for mounts to cleanup? */ #define GNS_TICK_TIMEOUT 1 /* how many times GNS will try to wait for 1 second for mount */ #define GNS_WAIT_ATTEMPTS 10 struct ll_sb_info { /* this protects pglist and max_r_a_pages. It isn't safe to grab from * interrupt contexts. */ spinlock_t ll_lock; struct obd_uuid ll_sb_uuid; struct obd_export *ll_md_exp; struct obd_export *ll_dt_exp; struct lov_desc ll_dt_desc; struct proc_dir_entry *ll_proc_root; struct lustre_id ll_rootid; /* root lustre id */ struct lustre_mount_data *ll_lmd; char *ll_instance; int ll_flags; struct list_head ll_conn_chain; /* per-conn chain of SBs */ struct hlist_head ll_orphan_dentry_list; /*please don't ask -p*/ struct ll_close_queue *ll_lcq; struct lprocfs_stats *ll_stats; /* lprocfs stats counter */ unsigned long ll_pglist_gen; struct list_head ll_pglist; struct ll_ra_info ll_ra_info; /* times spent waiting for locks in each call site. These are * all protected by the ll_lock */ struct obd_service_time ll_read_stime; struct obd_service_time ll_write_stime; struct obd_service_time ll_grouplock_stime; struct obd_service_time ll_seek_stime; struct obd_service_time ll_setattr_stime; struct obd_service_time ll_brw_stime; // struct obd_service_time ll_done_stime; int ll_config_version; /* last-applied update */ /* list of GNS mounts; protected by the dcache_lock */ struct list_head ll_mnt_list; struct semaphore ll_gns_sem; spinlock_t ll_gns_lock; wait_queue_head_t ll_gns_waitq; int ll_gns_state; struct timer_list ll_gns_timer; struct list_head ll_gns_sbi_head; unsigned long ll_gns_tick; unsigned long ll_gns_timeout; struct completion ll_gns_mount_finished; /* path to upcall */ char ll_gns_upcall[PATH_MAX]; /* mount object entry name */ char ll_gns_oname[PATH_MAX]; }; struct ll_gns_ctl { struct completion gc_starting; struct completion gc_finishing; }; /* mounting states */ #define LL_GNS_IDLE (1 << 0) #define LL_GNS_MOUNTING (1 << 1) #define LL_GNS_FINISHED (1 << 2) /* mounts checking flags */ #define LL_GNS_UMOUNT (1 << 0) #define LL_GNS_CHECK (1 << 1) struct ll_readahead_state { spinlock_t ras_lock; unsigned long ras_last_readpage, ras_consecutive; unsigned long ras_window_start, ras_window_len; unsigned long ras_next_readahead; }; extern kmem_cache_t *ll_file_data_slab; extern kmem_cache_t *ll_intent_slab; struct lustre_handle; struct ll_file_data { struct ll_readahead_state fd_ras; __u32 fd_flags; int fd_omode; struct lustre_handle fd_cwlockh; unsigned long fd_gid; }; struct lov_stripe_md; extern spinlock_t inode_lock; extern void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi); extern struct proc_dir_entry *proc_lustre_fs_root; #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)) # define hlist_del_init list_del_init #endif static inline struct inode *ll_info2i(struct ll_inode_info *lli) { #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) return &lli->lli_vfs_inode; #else return list_entry(lli, struct inode, u.generic_ip); #endif } struct it_cb_data { struct inode *icbd_parent; struct dentry **icbd_childp; obd_id hash; }; #define LLAP_MAGIC 98764321 struct ll_async_page { int llap_magic; void *llap_cookie; struct page *llap_page; struct list_head llap_pending_write; /* only trust these if the page lock is providing exclusion */ unsigned llap_write_queued:1, llap_defer_uptodate:1, llap_origin:3, llap_ra_used:1; struct list_head llap_proc_item; }; enum { LLAP_ORIGIN_UNKNOWN = 0, LLAP_ORIGIN_READPAGE, LLAP_ORIGIN_READAHEAD, LLAP_ORIGIN_COMMIT_WRITE, LLAP_ORIGIN_WRITEPAGE, LLAP__ORIGIN_MAX, }; /* llite/lproc_llite.c */ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb, char *lov, char *lmv); void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi); /* llite/dir.c */ extern struct file_operations ll_dir_operations; extern struct inode_operations ll_dir_inode_operations; /* llite/namei.c */ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir, int offset); struct inode *ll_iget(struct super_block *sb, ino_t hash, struct lustre_md *lic); struct dentry *ll_find_alias(struct inode *, struct dentry *); int ll_mdc_cancel_unused(struct lustre_handle *, struct inode *, int flags, void *opaque); int ll_mdc_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *, void *data, int flag); /* llite/rw.c */ int ll_prepare_write(struct file *, struct page *, unsigned from, unsigned to); int ll_commit_write(struct file *, struct page *, unsigned from, unsigned to); int ll_writepage(struct page *page); void ll_inode_fill_obdo(struct inode *inode, int cmd, struct obdo *oa); void ll_ap_completion(void *data, int cmd, struct obdo *oa, int rc); void ll_removepage(struct page *page); int ll_readpage(struct file *file, struct page *page); struct ll_async_page *llap_from_cookie(void *cookie); struct ll_async_page *llap_from_page(struct page *page, unsigned origin); struct ll_async_page *llap_cast_private(struct page *page); void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras); void ll_ra_accounting(struct page *page, struct address_space *mapping); void ll_truncate(struct inode *inode); /* llite/file.c */ extern struct file_operations ll_file_operations; extern struct inode_operations ll_file_inode_operations; int ll_md_real_close(struct obd_export *md_exp, struct inode *inode, int flags); extern int ll_inode_revalidate_it(struct dentry *); extern int ll_setxattr(struct dentry *, const char *, const void *, size_t, int); extern int ll_getxattr(struct dentry *, const char *, void *, size_t); extern int ll_listxattr(struct dentry *, char *, size_t); extern int ll_removexattr(struct dentry *, const char *); extern int ll_inode_permission(struct inode *, int, struct nameidata *); int ll_refresh_lsm(struct inode *inode, struct lov_stripe_md *lsm); int ll_extent_lock(struct ll_file_data *, struct inode *, struct lov_stripe_md *, int mode, ldlm_policy_data_t *, struct lustre_handle *, int ast_flags, struct obd_service_time *); int ll_extent_unlock(struct ll_file_data *, struct inode *, struct lov_stripe_md *, int mode, struct lustre_handle *); int ll_file_open(struct inode *inode, struct file *file); int ll_file_release(struct inode *inode, struct file *file); int ll_lsm_getattr(struct obd_export *, struct lov_stripe_md *, struct obdo *); int ll_glimpse_size(struct inode *inode); int ll_local_open(struct file *file, struct lookup_intent *it, struct obd_client_handle *och); int ll_md_close(struct obd_export *md_exp, struct inode *inode, struct file *file); int ll_md_och_close(struct obd_export *md_exp, struct inode *inode, struct obd_client_handle *och); void ll_och_fill(struct inode *inode, struct lookup_intent *it, struct obd_client_handle *och); #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0)) int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat); #endif void ll_stime_record(struct ll_sb_info *sbi, struct timeval *start, struct obd_service_time *stime); /* llite/dcache.c */ void ll_intent_drop_lock(struct lookup_intent *); void ll_intent_release(struct lookup_intent *); int ll_intent_alloc(struct lookup_intent *); void ll_intent_free(struct lookup_intent *it); extern void ll_set_dd(struct dentry *de); void ll_unhash_aliases(struct inode *); void ll_frob_intent(struct lookup_intent **itp, struct lookup_intent *deft); void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry); int revalidate_it_finish(struct ptlrpc_request *request, int offset, struct lookup_intent *it, struct dentry *de); /* llite/llite_gns.c */ int ll_gns_start_thread(void); void ll_gns_stop_thread(void); int ll_gns_mount_object(struct dentry *dentry, struct vfsmount *mnt); int ll_gns_umount_object(struct vfsmount *mnt); int ll_gns_check_mounts(struct ll_sb_info *sbi, int flags); void ll_gns_timer_callback(unsigned long data); void ll_gns_add_timer(struct ll_sb_info *sbi); void ll_gns_del_timer(struct ll_sb_info *sbi); /* llite/llite_lib.c */ extern struct super_operations lustre_super_operations; char *ll_read_opt(const char *opt, char *data); int ll_set_opt(const char *opt, char *data, int fl); void ll_options(char *options, char **ost, char **mds, char **sec, int *async, int *flags); void ll_lli_init(struct ll_inode_info *lli); int ll_fill_super(struct super_block *sb, void *data, int silent); int lustre_fill_super(struct super_block *sb, void *data, int silent); void lustre_put_super(struct super_block *sb); struct inode *ll_inode_from_lock(struct ldlm_lock *lock); void ll_clear_inode(struct inode *inode); int ll_attr2inode(struct inode *inode, struct iattr *attr, int trunc); int ll_setattr_raw(struct inode *inode, struct iattr *attr); int ll_setattr(struct dentry *de, struct iattr *attr); int ll_statfs(struct super_block *sb, struct kstatfs *sfs); int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs, unsigned long maxage); void ll_update_inode(struct inode *inode, struct lustre_md *); int it_disposition(struct lookup_intent *it, int flag); void it_set_disposition(struct lookup_intent *it, int flag); void ll_read_inode2(struct inode *inode, void *opaque); void ll_delete_inode(struct inode *inode); int ll_iocontrol(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); void ll_umount_begin(struct super_block *sb); int ll_prep_inode(struct obd_export *, struct obd_export *, struct inode **inode, struct ptlrpc_request *req, int offset, struct super_block *); __u32 get_uuid2int(const char *name, int len); struct dentry *ll_fh_to_dentry(struct super_block *sb, __u32 *data, int len, int fhtype, int parent); int ll_dentry_to_fh(struct dentry *, __u32 *datap, int *lenp, int need_parent); int null_if_equal(struct ldlm_lock *lock, void *data); int ll_process_config_update(struct ll_sb_info *sbi, int clean); /* llite/special.c */ extern struct inode_operations ll_special_inode_operations; extern struct file_operations ll_special_chr_inode_fops; extern struct file_operations ll_special_chr_file_fops; extern struct file_operations ll_special_blk_inode_fops; extern struct file_operations ll_special_fifo_inode_fops; extern struct file_operations ll_special_fifo_file_fops; extern struct file_operations ll_special_sock_inode_fops; /* llite/symlink.c */ extern struct inode_operations ll_fast_symlink_inode_operations; /* llite/llite_close.c */ struct ll_close_queue { spinlock_t lcq_lock; struct list_head lcq_list; wait_queue_head_t lcq_waitq; struct completion lcq_comp; }; void llap_write_pending(struct inode *inode, struct ll_async_page *llap); void llap_write_complete(struct inode *inode, struct ll_async_page *llap); void ll_open_complete(struct inode *inode); int ll_is_inode_dirty(struct inode *inode); void ll_try_done_writing(struct inode *inode); void ll_queue_done_writing(struct inode *inode); void ll_close_thread_shutdown(struct ll_close_queue *lcq); int ll_close_thread_start(struct ll_close_queue **lcq_ret); /* llite/llite_mmap.c */ #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) typedef struct rb_root rb_root_t; typedef struct rb_node rb_node_t; #endif struct ll_lock_tree_node; struct ll_lock_tree { rb_root_t lt_root; struct list_head lt_locked_list; struct ll_file_data *lt_fd; }; int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last); int ll_file_mmap(struct file * file, struct vm_area_struct * vma); struct ll_lock_tree_node * ll_node_from_inode(struct inode *inode, __u64 start, __u64 end, ldlm_mode_t mode); int ll_tree_lock(struct ll_lock_tree *tree, struct ll_lock_tree_node *first_node, struct inode *inode, const char *buf, size_t count, int ast_flags); int ll_tree_unlock(struct ll_lock_tree *tree, struct inode *inode); int ll_get_fid(struct obd_export *exp, struct lustre_id *idp, char *filename, struct lustre_id *ret); /* generic */ #define LL_SBI_NOLCK 0x1 #define LL_SBI_READAHEAD 0x2 #define LL_SUPER_MAGIC 0x0BD00BD0 #define LL_MAX_BLKSIZE (4UL * 1024 * 1024) #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)) #define ll_s2sbi(sb) ((struct ll_sb_info *)((sb)->s_fs_info)) #define ll_set_sbi(sb, sbi) ((sb)->s_fs_info = sbi) static inline __u64 ll_ts2u64(struct timespec *time) { __u64 t = time->tv_sec; return t; } #else /* 2.4 here */ #define ll_s2sbi(sb) ((struct ll_sb_info *)((sb)->u.generic_sbp)) #define ll_set_sbi(sb, sbi) ((sb)->u.generic_sbp = sbi) static inline __u64 ll_ts2u64(time_t *time) { return *time; } #endif /* don't need an addref as the sb_info should be holding one */ static inline struct obd_export *ll_s2dtexp(struct super_block *sb) { return ll_s2sbi(sb)->ll_dt_exp; } /* don't need an addref as the sb_info should be holding one */ static inline struct obd_export *ll_s2mdexp(struct super_block *sb) { return ll_s2sbi(sb)->ll_md_exp; } static inline struct client_obd *sbi2md(struct ll_sb_info *sbi) { struct obd_device *obd = sbi->ll_md_exp->exp_obd; if (obd == NULL) LBUG(); return &obd->u.cli; } // FIXME: replace the name of this with LL_SB to conform to kernel stuff static inline struct ll_sb_info *ll_i2sbi(struct inode *inode) { return ll_s2sbi(inode->i_sb); } static inline struct obd_export *ll_i2dtexp(struct inode *inode) { return ll_s2dtexp(inode->i_sb); } static inline struct obd_export *ll_i2mdexp(struct inode *inode) { return ll_s2mdexp(inode->i_sb); } static inline int ll_mds_max_easize(struct super_block *sb) { return sbi2md(ll_s2sbi(sb))->cl_max_mds_easize; } static inline __u64 ll_file_maxbytes(struct inode *inode) { return ll_i2info(inode)->lli_maxbytes; } static inline void ll_inode2id(struct lustre_id *id, struct inode *inode) { struct lustre_id *lid = &ll_i2info(inode)->lli_id; mdc_pack_id(id, inode->i_ino, inode->i_generation, (inode->i_mode & S_IFMT), id_group(lid), id_fid(lid)); } static inline void ll_prepare_mdc_data(struct mdc_op_data *data, struct inode *i1, struct inode *i2, const char *name, int namelen, int mode) { LASSERT(i1); ll_inode2id(&data->id1, i1); /* it could be directory with mea */ data->mea1 = ll_i2info(i1)->lli_mea; if (i2) { ll_inode2id(&data->id2, i2); data->mea2 = ll_i2info(i2)->lli_mea; } data->valid = 0; data->name = name; data->namelen = namelen; data->create_mode = mode; data->mod_time = LTIME_S(CURRENT_TIME); } #endif /* LLITE_INTERNAL_H */