/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program 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 version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved * Use is subject to license terms. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #ifndef LLITE_INTERNAL_H #define LLITE_INTERNAL_H #include #include #include #include /* for s2sbi */ #include /* for struct cl_lock_descr and struct cl_io */ #include #include #ifndef FMODE_EXEC #define FMODE_EXEC 0 #endif #ifndef DCACHE_LUSTRE_INVALID #define DCACHE_LUSTRE_INVALID 0x100 #endif #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0") #define LUSTRE_FPRIVATE(file) ((file)->private_data) #ifdef HAVE_VFS_INTENT_PATCHES static inline struct lookup_intent *ll_nd2it(struct nameidata *nd) { return &nd->intent; } #endif struct ll_dentry_data { int lld_cwd_count; int lld_mnt_count; struct obd_client_handle lld_cwd_och; struct obd_client_handle lld_mnt_och; #ifndef HAVE_VFS_INTENT_PATCHES struct lookup_intent *lld_it; #endif unsigned int lld_sa_generation; }; #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata)) extern struct file_operations ll_pgcache_seq_fops; #define LLI_INODE_MAGIC 0x111d0de5 #define LLI_INODE_DEAD 0xdeadd00d /* remote client permission cache */ #define REMOTE_PERM_HASHSIZE 16 /* llite setxid/access permission for user on remote client */ struct ll_remote_perm { struct hlist_node lrp_list; uid_t lrp_uid; gid_t lrp_gid; uid_t lrp_fsuid; gid_t lrp_fsgid; int lrp_access_perm; /* MAY_READ/WRITE/EXEC, this is access permission with lrp_fsuid/lrp_fsgid. */ }; enum lli_flags { /* MDS has an authority for the Size-on-MDS attributes. */ LLIF_MDS_SIZE_LOCK = (1 << 0), /* Epoch close is postponed. */ LLIF_EPOCH_PENDING = (1 << 1), /* DONE WRITING is allowed. */ LLIF_DONE_WRITING = (1 << 2), /* Sizeon-on-MDS attributes are changed. An attribute update needs to * be sent to MDS. */ LLIF_SOM_DIRTY = (1 << 3), /* File is contented */ LLIF_CONTENDED = (1 << 4), /* Truncate uses server lock for this file */ LLIF_SRVLOCK = (1 << 5) }; struct ll_inode_info { int lli_inode_magic; struct semaphore lli_size_sem; /* protect open and change size */ void *lli_size_sem_owner; struct semaphore lli_write_sem; char *lli_symlink_name; __u64 lli_maxbytes; __u64 lli_ioepoch; unsigned long lli_flags; cfs_time_t lli_contention_time; /* this lock protects posix_acl, pending_write_llaps, mmap_cnt */ spinlock_t lli_lock; struct list_head lli_close_list; /* handle is to be sent to MDS later on done_writing and setattr. * Open handle data are needed for the recovery to reconstruct * the inode state on the MDS. XXX: recovery is not ready yet. */ struct obd_client_handle *lli_pending_och; /* for writepage() only to communicate to fsync */ int lli_async_rc; struct posix_acl *lli_posix_acl; /* remote permission hash */ struct hlist_head *lli_remote_perms; unsigned long lli_rmtperm_utime; struct semaphore lli_rmtperm_sem; struct list_head lli_dead_list; struct semaphore lli_och_sem; /* Protects access to och pointers and their usage counters */ /* We need all three because every inode may be opened in different modes */ struct obd_client_handle *lli_mds_read_och; __u64 lli_open_fd_read_count; struct obd_client_handle *lli_mds_write_och; __u64 lli_open_fd_write_count; struct obd_client_handle *lli_mds_exec_och; __u64 lli_open_fd_exec_count; struct inode lli_vfs_inode; /* identifying fields for both metadata and data stacks. */ struct lu_fid lli_fid; struct lov_stripe_md *lli_smd; /* fid capability */ /* open count currently used by capability only, indicate whether * capability needs renewal */ atomic_t lli_open_count; struct obd_capa *lli_mds_capa; struct list_head lli_oss_capas; /* metadata stat-ahead */ /* * "opendir_pid" is the token when lookup/revalid -- I am the owner of * dir statahead. */ pid_t lli_opendir_pid; /* * since parent-child threads can share the same @file struct, * "opendir_key" is the token when dir close for case of parent exit * before child -- it is me should cleanup the dir readahead. */ void *lli_opendir_key; struct ll_statahead_info *lli_sai; struct cl_object *lli_clob; }; /* * Locking to guarantee consistency of non-atomic updates to long long i_size, * consistency between file size and KMS, and consistency within * ->lli_smd->lsm_oinfo[]'s. * * Implemented by ->lli_size_sem and ->lsm_sem, nested in that order. */ void ll_inode_size_lock(struct inode *inode, int lock_lsm); void ll_inode_size_unlock(struct inode *inode, int unlock_lsm); // FIXME: replace the name of this with LL_I to conform to kernel stuff // static inline struct ll_inode_info *LL_I(struct inode *inode) static inline struct ll_inode_info *ll_i2info(struct inode *inode) { return container_of(inode, struct ll_inode_info, lli_vfs_inode); } /* 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_READAHEAD_MAX (40UL << (20 - CFS_PAGE_SHIFT)) /* default to read-ahead full files smaller than 2MB on the second read */ #define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - CFS_PAGE_SHIFT)) enum ra_stat { RA_STAT_HIT = 0, RA_STAT_MISS, RA_STAT_DISTANT_READPAGE, RA_STAT_MISS_IN_WINDOW, RA_STAT_FAILED_GRAB_PAGE, RA_STAT_FAILED_MATCH, RA_STAT_DISCARDED, RA_STAT_ZERO_LEN, RA_STAT_ZERO_WINDOW, RA_STAT_EOF, RA_STAT_MAX_IN_FLIGHT, RA_STAT_WRONG_GRAB_PAGE, _NR_RA_STAT, }; struct ll_ra_info { atomic_t ra_cur_pages; unsigned long ra_max_pages; unsigned long ra_max_pages_per_file; unsigned long ra_max_read_ahead_whole_pages; }; /* ra_io_arg will be filled in the beginning of ll_readahead with * ras_lock, then the following ll_read_ahead_pages will read RA * pages according to this arg, all the items in this structure are * counted by page index. */ struct ra_io_arg { unsigned long ria_start; /* start offset of read-ahead*/ unsigned long ria_end; /* end offset of read-ahead*/ /* If stride read pattern is detected, ria_stoff means where * stride read is started. Note: for normal read-ahead, the * value here is meaningless, and also it will not be accessed*/ pgoff_t ria_stoff; /* ria_length and ria_pages are the length and pages length in the * stride I/O mode. And they will also be used to check whether * it is stride I/O read-ahead in the read-ahead pages*/ unsigned long ria_length; unsigned long ria_pages; }; /* LL_HIST_MAX=32 causes an overflow */ #define LL_HIST_MAX 28 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */ #define LL_PROCESS_HIST_MAX 10 struct per_process_info { pid_t pid; struct obd_histogram pp_r_hist; struct obd_histogram pp_w_hist; }; /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */ struct ll_rw_extents_info { struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1]; }; #define LL_OFFSET_HIST_MAX 100 struct ll_rw_process_info { pid_t rw_pid; int rw_op; loff_t rw_range_start; loff_t rw_range_end; loff_t rw_last_file_pos; loff_t rw_offset; size_t rw_smallest_extent; size_t rw_largest_extent; struct ll_file_data *rw_last_file; }; enum stats_track_type { STATS_TRACK_ALL = 0, /* track all processes */ STATS_TRACK_PID, /* track process with this pid */ STATS_TRACK_PPID, /* track processes with this ppid */ STATS_TRACK_GID, /* track processes with this gid */ STATS_TRACK_LAST, }; /* flags for sbi->ll_flags */ #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */ #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */ #define LL_SBI_FLOCK 0x04 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */ #define LL_SBI_ACL 0x10 /* support ACL */ #define LL_SBI_JOIN 0x20 /* support JOIN */ #define LL_SBI_RMT_CLIENT 0x40 /* remote client */ #define LL_SBI_MDS_CAPA 0x80 /* support mds capa */ #define LL_SBI_OSS_CAPA 0x100 /* support oss capa */ #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */ #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */ #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */ /* default value for ll_sb_info->contention_time */ #define SBI_DEFAULT_CONTENTION_SECONDS 60 /* default value for lockless_truncate_enable */ #define SBI_DEFAULT_LOCKLESS_TRUNCATE_ENABLE 1 #define RCE_HASHES 32 struct rmtacl_ctl_entry { struct list_head rce_list; pid_t rce_key; /* hash key */ int rce_ops; /* acl operation type */ }; struct rmtacl_ctl_table { spinlock_t rct_lock; struct list_head rct_entries[RCE_HASHES]; }; #define EE_HASHES 32 struct eacl_entry { struct list_head ee_list; pid_t ee_key; /* hash key */ struct lu_fid ee_fid; int ee_type; /* ACL type for ACCESS or DEFAULT */ ext_acl_xattr_header *ee_acl; }; struct eacl_table { spinlock_t et_lock; struct list_head et_entries[EE_HASHES]; }; struct ll_sb_info { struct list_head ll_list; /* this protects pglist and ra_info. It isn't safe to * grab from interrupt contexts */ spinlock_t ll_lock; spinlock_t ll_pp_extent_lock; /* Lock for pp_extent entries */ spinlock_t ll_process_lock; /* Lock for ll_rw_process_info */ struct obd_uuid ll_sb_uuid; struct obd_export *ll_md_exp; struct obd_export *ll_dt_exp; struct proc_dir_entry* ll_proc_root; struct lu_fid ll_root_fid; /* root object fid */ int ll_flags; struct list_head ll_conn_chain; /* per-conn chain of SBs */ struct lustre_client_ocd ll_lco; struct list_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_async_page_max; unsigned long ll_async_page_count; struct lprocfs_stats *ll_ra_stats; struct ll_ra_info ll_ra_info; unsigned int ll_namelen; struct file_operations *ll_fop; #ifdef HAVE_EXPORT___IGET struct list_head ll_deathrow; /* inodes to be destroyed (b1443) */ spinlock_t ll_deathrow_lock; #endif /* =0 - hold lock over whole read/write * >0 - max. chunk to be read/written w/o lock re-acquiring */ unsigned long ll_max_rw_chunk; struct lu_site *ll_site; struct cl_device *ll_cl; /* Statistics */ struct ll_rw_extents_info ll_rw_extents_info; int ll_extent_process_count; struct ll_rw_process_info ll_rw_process_info[LL_PROCESS_HIST_MAX]; unsigned int ll_offset_process_count; struct ll_rw_process_info ll_rw_offset_info[LL_OFFSET_HIST_MAX]; unsigned int ll_rw_offset_entry_count; enum stats_track_type ll_stats_track_type; int ll_stats_track_id; int ll_rw_stats_on; /* metadata stat-ahead */ unsigned int ll_sa_max; /* max statahead RPCs */ unsigned int ll_sa_wrong; /* statahead thread stopped for * low hit ratio */ unsigned int ll_sa_total; /* statahead thread started * count */ unsigned long long ll_sa_blocked; /* ls count waiting for * statahead */ unsigned long long ll_sa_cached; /* ls count got in cache */ unsigned long long ll_sa_hit; /* hit count */ unsigned long long ll_sa_miss; /* miss count */ dev_t ll_sdev_orig; /* save s_dev before assign for * clustred nfs */ struct rmtacl_ctl_table ll_rct; struct eacl_table ll_et; }; #define LL_DEFAULT_MAX_RW_CHUNK (32 * 1024 * 1024) struct ll_ra_read { pgoff_t lrr_start; pgoff_t lrr_count; struct task_struct *lrr_reader; struct list_head lrr_linkage; }; /* * per file-descriptor read-ahead data. */ struct ll_readahead_state { spinlock_t ras_lock; /* * index of the last page that read(2) needed and that wasn't in the * cache. Used by ras_update() to detect seeks. * * XXX nikita: if access seeks into cached region, Lustre doesn't see * this. */ unsigned long ras_last_readpage; /* * number of pages read after last read-ahead window reset. As window * is reset on each seek, this is effectively a number of consecutive * accesses. Maybe ->ras_accessed_in_window is better name. * * XXX nikita: window is also reset (by ras_update()) when Lustre * believes that memory pressure evicts read-ahead pages. In that * case, it probably doesn't make sense to expand window to * PTLRPC_MAX_BRW_PAGES on the third access. */ unsigned long ras_consecutive_pages; /* * number of read requests after the last read-ahead window reset * As window is reset on each seek, this is effectively the number * on consecutive read request and is used to trigger read-ahead. */ unsigned long ras_consecutive_requests; /* * Parameters of current read-ahead window. Handled by * ras_update(). On the initial access to the file or after a seek, * window is reset to 0. After 3 consecutive accesses, window is * expanded to PTLRPC_MAX_BRW_PAGES. Afterwards, window is enlarged by * PTLRPC_MAX_BRW_PAGES chunks up to ->ra_max_pages. */ unsigned long ras_window_start, ras_window_len; /* * Where next read-ahead should start at. This lies within read-ahead * window. Read-ahead window is read in pieces rather than at once * because: 1. lustre limits total number of pages under read-ahead by * ->ra_max_pages (see ll_ra_count_get()), 2. client cannot read pages * not covered by DLM lock. */ unsigned long ras_next_readahead; /* * Total number of ll_file_read requests issued, reads originating * due to mmap are not counted in this total. This value is used to * trigger full file read-ahead after multiple reads to a small file. */ unsigned long ras_requests; /* * Page index with respect to the current request, these value * will not be accurate when dealing with reads issued via mmap. */ unsigned long ras_request_index; /* * list of struct ll_ra_read's one per read(2) call current in * progress against this file descriptor. Used by read-ahead code, * protected by ->ras_lock. */ struct list_head ras_read_beads; /* * The following 3 items are used for detecting the stride I/O * mode. * In stride I/O mode, * ...............|-----data-----|****gap*****|--------|******|.... * offset |-stride_pages-|-stride_gap-| * ras_stride_offset = offset; * ras_stride_length = stride_pages + stride_gap; * ras_stride_pages = stride_pages; * Note: all these three items are counted by pages. */ unsigned long ras_stride_length; unsigned long ras_stride_pages; pgoff_t ras_stride_offset; /* * number of consecutive stride request count, and it is similar as * ras_consecutive_requests, but used for stride I/O mode. * Note: only more than 2 consecutive stride request are detected, * stride read-ahead will be enable */ unsigned long ras_consecutive_stride_requests; }; struct ll_file_dir { }; extern cfs_mem_cache_t *ll_file_data_slab; struct lustre_handle; struct ll_file_data { struct ll_readahead_state fd_ras; int fd_omode; struct ccc_grouplock fd_grouplock; struct ll_file_dir fd_dir; __u32 fd_flags; struct file *fd_file; }; struct lov_stripe_md; extern spinlock_t inode_lock; extern struct proc_dir_entry *proc_lustre_fs_root; static inline struct inode *ll_info2i(struct ll_inode_info *lli) { return &lli->lli_vfs_inode; } struct it_cb_data { struct inode *icbd_parent; struct dentry **icbd_childp; obd_id hash; }; __u32 ll_i2suppgid(struct inode *i); void ll_i2gids(__u32 *suppgids, struct inode *i1,struct inode *i2); #define LLAP_MAGIC 98764321 extern cfs_mem_cache_t *ll_async_page_slab; extern size_t ll_async_page_slab_size; void ll_ra_read_in(struct file *f, struct ll_ra_read *rar); void ll_ra_read_ex(struct file *f, struct ll_ra_read *rar); struct ll_ra_read *ll_ra_read_get(struct file *f); /* llite/lproc_llite.c */ #ifdef LPROCFS int lprocfs_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb, char *osc, char *mdc); void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi); void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count); void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars); #else static inline int lprocfs_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb, char *osc, char *mdc){return 0;} static inline void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) {} static void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {} static void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars) { memset(lvars, 0, sizeof(*lvars)); } #endif /* llite/dir.c */ static inline void ll_put_page(struct page *page) { kunmap(page); page_cache_release(page); } extern struct file_operations ll_dir_operations; extern struct inode_operations ll_dir_inode_operations; struct page *ll_get_dir_page(struct inode *dir, __u64 hash, int exact, struct ll_dir_chain *chain); /* llite/namei.c */ int ll_objects_destroy(struct ptlrpc_request *request, struct inode *dir); struct inode *ll_iget(struct super_block *sb, ino_t hash, struct lustre_md *lic); int ll_md_blocking_ast(struct ldlm_lock *, struct ldlm_lock_desc *, void *data, int flag); #ifndef HAVE_VFS_INTENT_PATCHES struct lookup_intent *ll_convert_intent(struct open_intent *oit, int lookup_flags); #endif int ll_lookup_it_finish(struct ptlrpc_request *request, struct lookup_intent *it, void *data); void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry); /* 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, struct writeback_control *wbc); void ll_removepage(struct page *page); int ll_readpage(struct file *file, struct page *page); void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras); void ll_truncate(struct inode *inode); int ll_file_punch(struct inode *, loff_t, int); ssize_t ll_file_lockless_io(struct file *, char *, size_t, loff_t *, int); void ll_clear_file_contended(struct inode*); int ll_sync_page_range(struct inode *, struct address_space *, loff_t, size_t); int ll_readahead(const struct lu_env *env, struct cl_io *io, struct ll_readahead_state *ras, struct address_space *mapping, struct cl_page_list *queue, int flags); /* llite/file.c */ extern struct file_operations ll_file_operations; extern struct file_operations ll_file_operations_flock; extern struct file_operations ll_file_operations_noflock; extern struct inode_operations ll_file_inode_operations; extern int ll_inode_revalidate_it(struct dentry *, struct lookup_intent *); extern int ll_have_md_lock(struct inode *inode, __u64 bits); extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits, struct lustre_handle *lockh); int __ll_inode_revalidate_it(struct dentry *, struct lookup_intent *, __u64 bits); int ll_revalidate_nd(struct dentry *dentry, struct nameidata *nd); int ll_file_open(struct inode *inode, struct file *file); int ll_file_release(struct inode *inode, struct file *file); int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm, lstat_t *st); void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch); int ll_local_open(struct file *file, struct lookup_intent *it, struct ll_file_data *fd, struct obd_client_handle *och); int ll_release_openhandle(struct dentry *, struct lookup_intent *); int ll_md_close(struct obd_export *md_exp, struct inode *inode, struct file *file); int ll_md_real_close(struct inode *inode, int flags); void ll_epoch_close(struct inode *inode, struct md_op_data *op_data, struct obd_client_handle **och, unsigned long flags); int ll_sizeonmds_update(struct inode *inode, struct lustre_handle *fh, __u64 ioepoch); int ll_inode_getattr(struct inode *inode, struct obdo *obdo); int ll_md_setattr(struct inode *inode, struct md_op_data *op_data, struct md_open_data **mod); void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data, struct lustre_handle *fh); extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct ll_file_data *file, loff_t pos, size_t count, int rw); int ll_getattr_it(struct vfsmount *mnt, struct dentry *de, struct lookup_intent *it, struct kstat *stat); int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat); struct ll_file_data *ll_file_data_get(void); int ll_inode_permission(struct inode *inode, int mask, struct nameidata *nd); int ll_lov_setstripe_ea_info(struct inode *inode, struct file *file, int flags, struct lov_user_md *lum, int lum_size); int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename, struct lov_mds_md **lmm, int *lmm_size, struct ptlrpc_request **request); int ll_dir_setstripe(struct inode *inode, struct lov_user_md *lump, int set_default); int ll_dir_getstripe(struct inode *inode, struct lov_mds_md **lmm, int *lmm_size, struct ptlrpc_request **request); int ll_fsync(struct file *file, struct dentry *dentry, int data); int ll_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap, int num_bytes); int ll_merge_lvb(struct inode *inode); int ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg); int ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg); int ll_fid2path(struct obd_export *exp, void *arg); /* llite/dcache.c */ /* llite/namei.c */ /** * protect race ll_find_aliases vs ll_revalidate_it vs ll_unhash_aliases */ extern spinlock_t ll_lookup_lock; extern struct dentry_operations ll_d_ops; void ll_intent_drop_lock(struct lookup_intent *); void ll_intent_release(struct lookup_intent *); int ll_drop_dentry(struct dentry *dentry); extern void ll_set_dd(struct dentry *de); int ll_drop_dentry(struct dentry *dentry); 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 ll_dcompare(struct dentry *parent, struct qstr *d_name, struct qstr *name); int ll_revalidate_it_finish(struct ptlrpc_request *request, struct lookup_intent *it, struct dentry *de); /* llite/llite_lib.c */ extern struct super_operations lustre_super_operations; void ll_dump_inode(struct inode *inode); char *ll_read_opt(const char *opt, char *data); void ll_lli_init(struct ll_inode_info *lli); int ll_fill_super(struct super_block *sb); void ll_put_super(struct super_block *sb); void ll_kill_super(struct super_block *sb); int ll_shrink_cache(int nr_to_scan, gfp_t gfp_mask); struct inode *ll_inode_from_lock(struct ldlm_lock *lock); void ll_clear_inode(struct inode *inode); int ll_setattr_raw(struct inode *inode, struct iattr *attr); int ll_setattr(struct dentry *de, struct iattr *attr); #ifndef HAVE_STATFS_DENTRY_PARAM int ll_statfs(struct super_block *sb, struct kstatfs *sfs); #else int ll_statfs(struct dentry *de, struct kstatfs *sfs); #endif int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs, __u64 max_age, __u32 flags); void ll_update_inode(struct inode *inode, struct lustre_md *md); 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); int ll_flush_ctx(struct inode *inode); #ifdef HAVE_UMOUNTBEGIN_VFSMOUNT void ll_umount_begin(struct vfsmount *vfsmnt, int flags); #else void ll_umount_begin(struct super_block *sb); #endif int ll_remount_fs(struct super_block *sb, int *flags, char *data); int ll_show_options(struct seq_file *seq, struct vfsmount *vfs); int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req, struct super_block *); void lustre_dump_dentry(struct dentry *, int recur); void lustre_dump_inode(struct inode *); int ll_obd_statfs(struct inode *inode, void *arg); int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize); int ll_process_config(struct lustre_cfg *lcfg); struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data, struct inode *i1, struct inode *i2, const char *name, int namelen, int mode, __u32 opc, void *data); void ll_finish_md_op_data(struct md_op_data *op_data); /* llite/llite_nfs.c */ extern struct export_operations lustre_export_operations; __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); /* 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_head; wait_queue_head_t lcq_waitq; struct completion lcq_comp; atomic_t lcq_stop; }; struct vvp_thread_info { struct ost_lvb vti_lvb; struct cl_2queue vti_queue; struct iovec vti_local_iov; struct ccc_io_args vti_args; struct ra_io_arg vti_ria; struct kiocb vti_kiocb; }; struct ccc_object *cl_inode2ccc(struct inode *inode); static inline struct vvp_thread_info *vvp_env_info(const struct lu_env *env) { extern struct lu_context_key vvp_key; struct vvp_thread_info *info; info = lu_context_key_get(&env->le_ctx, &vvp_key); LASSERT(info != NULL); return info; } void vvp_write_pending (struct ccc_object *club, struct ccc_page *page); void vvp_write_complete(struct ccc_object *club, struct ccc_page *page); struct vvp_io { union { struct { read_actor_t cui_actor; void *cui_target; } read; struct vvp_fault_io { /** * Inode modification time that is checked across DLM * lock request. */ time_t ft_mtime; struct vm_area_struct *ft_vma; /** * Virtual address at which fault occurred. */ unsigned long ft_address; /** * Fault type, as to be supplied to filemap_nopage(). */ int *ft_type; } fault; } u; /** * Read-ahead state used by read and page-fault IO contexts. */ struct ll_ra_read cui_bead; /** * Set when cui_bead has been initialized. */ int cui_ra_window_set; /** * If IO was created directly in low level method like * ->prepare_write(), this field stores the number of method calls * that constitute this IO. This field is decremented by ll_cl_fini(), * and cl_io is destroyed, when it reaches 0. When oneshot IO * completes, this fields is set to -1. */ int cui_oneshot; /** * Partially truncated page, that vvp_io_trunc_start() keeps locked * across truncate. */ struct cl_page *cui_partpage; }; struct vvp_session { struct vvp_io vs_ios; }; static inline struct vvp_session *vvp_env_session(const struct lu_env *env) { extern struct lu_context_key vvp_session_key; struct vvp_session *ses; ses = lu_context_key_get(env->le_ses, &vvp_session_key); LASSERT(ses != NULL); return ses; } static inline struct vvp_io *vvp_env_io(const struct lu_env *env) { return &vvp_env_session(env)->vs_ios; } void ll_queue_done_writing(struct inode *inode, unsigned long flags); 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 */ typedef struct rb_root rb_root_t; typedef struct rb_node rb_node_t; 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); void policy_from_vma(ldlm_policy_data_t *policy, struct vm_area_struct *vma, unsigned long addr, size_t count); struct vm_area_struct *our_vma(unsigned long addr, size_t count); #define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi) static inline __u64 ll_ts2u64(struct timespec *time) { __u64 t = time->tv_sec; return t; } /* 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 *sbi2mdc(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 struct lu_fid *ll_inode2fid(struct inode *inode) { struct lu_fid *fid; LASSERT(inode != NULL); fid = &ll_i2info(inode)->lli_fid; LASSERT(fid_is_igif(fid) || fid_ver(fid) == 0); return fid; } static inline int ll_mds_max_easize(struct super_block *sb) { return sbi2mdc(ll_s2sbi(sb))->cl_max_mds_easize; } static inline __u64 ll_file_maxbytes(struct inode *inode) { return ll_i2info(inode)->lli_maxbytes; } /* llite/xattr.c */ int ll_setxattr(struct dentry *dentry, const char *name, const void *value, size_t size, int flags); ssize_t ll_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size); ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size); int ll_removexattr(struct dentry *dentry, const char *name); /* llite/remote_perm.c */ extern cfs_mem_cache_t *ll_remote_perm_cachep; extern cfs_mem_cache_t *ll_rmtperm_hash_cachep; struct hlist_head *alloc_rmtperm_hash(void); void free_rmtperm_hash(struct hlist_head *hash); int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm); int lustre_check_remote_perm(struct inode *inode, int mask); /* llite/llite_fid.c */ ino_t ll_fid_build_ino(struct ll_sb_info *sbi, struct lu_fid *fid); __u32 ll_fid_build_gen(struct ll_sb_info *sbi, struct lu_fid *fid); /* llite/llite_capa.c */ extern cfs_timer_t ll_capa_timer; int ll_capa_thread_start(void); void ll_capa_thread_stop(void); void ll_capa_timer_callback(unsigned long unused); struct obd_capa *ll_add_capa(struct inode *inode, struct obd_capa *ocapa); int ll_update_capa(struct obd_capa *ocapa, struct lustre_capa *capa); void ll_capa_open(struct inode *inode); void ll_capa_close(struct inode *inode); struct obd_capa *ll_mdscapa_get(struct inode *inode); struct obd_capa *ll_osscapa_get(struct inode *inode, __u64 opc); void ll_truncate_free_capa(struct obd_capa *ocapa); void ll_clear_inode_capas(struct inode *inode); void ll_print_capa_stat(struct ll_sb_info *sbi); /* llite/llite_cl.c */ extern struct lu_device_type vvp_device_type; /** * Common IO arguments for various VFS I/O interfaces. */ int cl_sb_init(struct super_block *sb); int cl_sb_fini(struct super_block *sb); int cl_inode_init(struct inode *inode, struct lustre_md *md); void cl_inode_fini(struct inode *inode); enum cl_lock_mode vvp_mode_from_vma(struct vm_area_struct *vma); void ll_io_init(struct cl_io *io, const struct file *file, int write); void ras_update(struct ll_sb_info *sbi, struct inode *inode, struct ll_readahead_state *ras, unsigned long index, unsigned hit); void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len); int ll_is_file_contended(struct file *file); void ll_ra_stats_inc(struct address_space *mapping, enum ra_stat which); /* llite/llite_rmtacl.c */ #ifdef CONFIG_FS_POSIX_ACL obd_valid rce_ops2valid(int ops); struct rmtacl_ctl_entry *rct_search(struct rmtacl_ctl_table *rct, pid_t key); int rct_add(struct rmtacl_ctl_table *rct, pid_t key, int ops); int rct_del(struct rmtacl_ctl_table *rct, pid_t key); void rct_init(struct rmtacl_ctl_table *rct); void rct_fini(struct rmtacl_ctl_table *rct); void ee_free(struct eacl_entry *ee); int ee_add(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type, ext_acl_xattr_header *header); struct eacl_entry *et_search_del(struct eacl_table *et, pid_t key, struct lu_fid *fid, int type); void et_search_free(struct eacl_table *et, pid_t key); void et_init(struct eacl_table *et); void et_fini(struct eacl_table *et); #endif /* statahead.c */ #define LL_SA_RPC_MIN 2 #define LL_SA_RPC_DEF 32 #define LL_SA_RPC_MAX 8192 /* per inode struct, for dir only */ struct ll_statahead_info { struct inode *sai_inode; unsigned int sai_generation; /* generation for statahead */ atomic_t sai_refcount; /* when access this struct, hold * refcount */ unsigned int sai_sent; /* stat requests sent count */ unsigned int sai_replied; /* stat requests which received * reply */ unsigned int sai_max; /* max ahead of lookup */ unsigned int sai_index; /* index of statahead entry */ unsigned int sai_index_next; /* index for the next statahead * entry to be stated */ unsigned int sai_hit; /* hit count */ unsigned int sai_miss; /* miss count: * for "ls -al" case, it includes * hidden dentry miss; * for "ls -l" case, it does not * include hidden dentry miss. * "sai_miss_hidden" is used for * the later case. */ unsigned int sai_consecutive_miss; /* consecutive miss */ unsigned int sai_miss_hidden;/* "ls -al", but first dentry * is not a hidden one */ unsigned int sai_skip_hidden;/* skipped hidden dentry count */ unsigned int sai_ls_all:1; /* "ls -al", do stat-ahead for * hidden entries */ cfs_waitq_t sai_waitq; /* stat-ahead wait queue */ struct ptlrpc_thread sai_thread; /* stat-ahead thread */ struct list_head sai_entries_sent; /* entries sent out */ struct list_head sai_entries_received; /* entries returned */ struct list_head sai_entries_stated; /* entries stated */ }; int do_statahead_enter(struct inode *dir, struct dentry **dentry, int lookup); void ll_statahead_exit(struct inode *dir, struct dentry *dentry, int result); void ll_stop_statahead(struct inode *inode, void *key); static inline void ll_statahead_mark(struct inode *dir, struct dentry *dentry) { struct ll_inode_info *lli; struct ll_dentry_data *ldd = ll_d2d(dentry); /* dentry has been move to other directory, no need mark */ if (unlikely(dir != dentry->d_parent->d_inode)) return; lli = ll_i2info(dir); /* not the same process, don't mark */ if (lli->lli_opendir_pid != cfs_curproc_pid()) return; spin_lock(&lli->lli_lock); if (likely(lli->lli_sai != NULL && ldd != NULL)) ldd->lld_sa_generation = lli->lli_sai->sai_generation; spin_unlock(&lli->lli_lock); } static inline int ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int lookup) { struct ll_inode_info *lli; struct ll_dentry_data *ldd = ll_d2d(*dentryp); if (unlikely(dir == NULL)) return -EAGAIN; if (ll_i2sbi(dir)->ll_sa_max == 0) return -ENOTSUPP; lli = ll_i2info(dir); /* not the same process, don't statahead */ if (lli->lli_opendir_pid != cfs_curproc_pid()) return -EAGAIN; /* * When "ls" a dentry, the system trigger more than once "revalidate" or * "lookup", for "getattr", for "getxattr", and maybe for others. * Under patchless client mode, the operation intent is not accurate, * it maybe misguide the statahead thread. For example: * The "revalidate" call for "getattr" and "getxattr" of a dentry maybe * have the same operation intent -- "IT_GETATTR". * In fact, one dentry should has only one chance to interact with the * statahead thread, otherwise the statahead windows will be confused. * The solution is as following: * Assign "lld_sa_generation" with "sai_generation" when a dentry * "IT_GETATTR" for the first time, and the subsequent "IT_GETATTR" * will bypass interacting with statahead thread for checking: * "lld_sa_generation == lli_sai->sai_generation" */ if (ldd && lli->lli_sai && ldd->lld_sa_generation == lli->lli_sai->sai_generation) return -EAGAIN; return do_statahead_enter(dir, dentryp, lookup); } static void inline ll_dops_init(struct dentry *de, int block) { struct ll_dentry_data *lld = ll_d2d(de); if (lld == NULL && block != 0) { ll_set_dd(de); lld = ll_d2d(de); } if (lld != NULL) lld->lld_sa_generation = 0; de->d_op = &ll_d_ops; } /* llite ioctl register support rountine */ #ifdef __KERNEL__ enum llioc_iter { LLIOC_CONT = 0, LLIOC_STOP }; #define LLIOC_MAX_CMD 256 /* * Rules to write a callback function: * * Parameters: * @magic: Dynamic ioctl call routine will feed this vaule with the pointer * returned to ll_iocontrol_register. Callback functions should use this * data to check the potential collasion of ioctl cmd. If collasion is * found, callback function should return LLIOC_CONT. * @rcp: The result of ioctl command. * * Return values: * If @magic matches the pointer returned by ll_iocontrol_data, the * callback should return LLIOC_STOP; return LLIOC_STOP otherwise. */ typedef enum llioc_iter (*llioc_callback_t)(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg, void *magic, int *rcp); enum llioc_iter ll_iocontrol_call(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg, int *rcp); /* export functions */ /* Register ioctl block dynamatically for a regular file. * * @cmd: the array of ioctl command set * @count: number of commands in the @cmd * @cb: callback function, it will be called if an ioctl command is found to * belong to the command list @cmd. * * Return vaule: * A magic pointer will be returned if success; * otherwise, NULL will be returned. * */ void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd); void ll_iocontrol_unregister(void *magic); #endif /* lclient compat stuff */ #define cl_inode_info ll_inode_info #define cl_i2info(info) ll_i2info(info) #define cl_inode_mode(inode) ((inode)->i_mode) #define cl_i2sbi ll_i2sbi #define cl_isize_read(inode) i_size_read(inode) #define cl_isize_write(inode,kms) i_size_write(inode, kms) #define cl_isize_write_nolock(inode,kms) do {(inode)->i_size=(kms);}while(0) static inline void cl_isize_lock(struct inode *inode, int lsmlock) { ll_inode_size_lock(inode, lsmlock); } static inline void cl_isize_unlock(struct inode *inode, int lsmlock) { ll_inode_size_unlock(inode, lsmlock); } static inline int cl_merge_lvb(struct inode *inode) { return ll_merge_lvb(inode); } #define cl_inode_atime(inode) LTIME_S((inode)->i_atime) #define cl_inode_ctime(inode) LTIME_S((inode)->i_ctime) #define cl_inode_mtime(inode) LTIME_S((inode)->i_mtime) struct obd_capa *cl_capa_lookup(struct inode *inode, enum cl_req_type crt); /** direct write pages */ struct ll_dio_pages { /** page array to be written. we don't support * partial pages except the last one. */ struct page **ldp_pages; /* offset of each page */ loff_t *ldp_offsets; /** if ldp_offsets is NULL, it means a sequential * pages to be written, then this is the file offset * of the * first page. */ loff_t ldp_start_offset; /** how many bytes are to be written. */ size_t ldp_size; /** # of pages in the array. */ int ldp_nr; }; extern ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io, int rw, struct inode *inode, struct ll_dio_pages *pv); #endif /* LLITE_INTERNAL_H */