diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/llite_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/llite_internal.h | 1337 |
1 files changed, 0 insertions, 1337 deletions
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h deleted file mode 100644 index d46bcf71b273..000000000000 --- a/drivers/staging/lustre/lustre/llite/llite_internal.h +++ /dev/null @@ -1,1337 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * 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 <lustre_debug.h> -#include <uapi/linux/lustre/lustre_ver.h> -#include <lustre_disk.h> /* for s2sbi */ -#include <lustre_linkea.h> - -/* for struct cl_lock_descr and struct cl_io */ -#include <lustre_patchless_compat.h> -#include <lustre_compat.h> -#include <cl_object.h> -#include <lustre_lmv.h> -#include <lustre_mdc.h> -#include <lustre_intent.h> -#include <linux/compat.h> -#include <linux/namei.h> -#include <linux/xattr.h> -#include <linux/posix_acl_xattr.h> -#include "vvp_internal.h" -#include "range_lock.h" - -#ifndef FMODE_EXEC -#define FMODE_EXEC 0 -#endif - -#ifndef VM_FAULT_RETRY -#define VM_FAULT_RETRY 0 -#endif - -/** Only used on client-side for indicating the tail of dir hash/offset. */ -#define LL_DIR_END_OFF 0x7fffffffffffffffULL -#define LL_DIR_END_OFF_32BIT 0x7fffffffUL - -/* 4UL * 1024 * 1024 */ -#define LL_MAX_BLKSIZE_BITS 22 - -#define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0") -#define LUSTRE_FPRIVATE(file) ((file)->private_data) - -struct ll_dentry_data { - struct lookup_intent *lld_it; - unsigned int lld_sa_generation; - unsigned int lld_invalid:1; - unsigned int lld_nfs_dentry:1; - struct rcu_head lld_rcu_head; -}; - -#define ll_d2d(de) ((struct ll_dentry_data *)((de)->d_fsdata)) - -#define LLI_INODE_MAGIC 0x111d0de5 -#define LLI_INODE_DEAD 0xdeadd00d - -struct ll_getname_data { - struct dir_context ctx; - char *lgd_name; /* points to buffer with NAME_MAX+1 size */ - struct lu_fid lgd_fid; /* target fid we are looking for */ - int lgd_found; /* inode matched? */ -}; - -struct ll_grouplock { - struct lu_env *lg_env; - struct cl_io *lg_io; - struct cl_lock *lg_lock; - unsigned long lg_gid; -}; - -enum ll_file_flags { - /* File data is modified. */ - LLIF_DATA_MODIFIED = 0, - /* File is being restored */ - LLIF_FILE_RESTORING = 1, - /* Xattr cache is attached to the file */ - LLIF_XATTR_CACHE = 2, -}; - -struct ll_inode_info { - __u32 lli_inode_magic; - - spinlock_t lli_lock; - unsigned long lli_flags; - struct posix_acl *lli_posix_acl; - - /* identifying fields for both metadata and data stacks. */ - struct lu_fid lli_fid; - /* master inode fid for stripe directory */ - struct lu_fid lli_pfid; - - /* We need all three because every inode may be opened in different - * modes - */ - struct obd_client_handle *lli_mds_read_och; - struct obd_client_handle *lli_mds_write_och; - struct obd_client_handle *lli_mds_exec_och; - __u64 lli_open_fd_read_count; - __u64 lli_open_fd_write_count; - __u64 lli_open_fd_exec_count; - /* Protects access to och pointers and their usage counters */ - struct mutex lli_och_mutex; - - struct inode lli_vfs_inode; - - /* the most recent timestamps obtained from mds */ - s64 lli_atime; - s64 lli_mtime; - s64 lli_ctime; - spinlock_t lli_agl_lock; - - /* Try to make the d::member and f::member are aligned. Before using - * these members, make clear whether it is directory or not. - */ - union { - /* for directory */ - struct { - /* serialize normal readdir and statahead-readdir. */ - struct mutex lli_readdir_mutex; - - /* metadata statahead */ - /* 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; - /* protect statahead stuff. */ - spinlock_t lli_sa_lock; - /* "opendir_pid" is the token when lookup/revalidate - * -- I am the owner of dir statahead. - */ - pid_t lli_opendir_pid; - /* stat will try to access statahead entries or start - * statahead if this flag is set, and this flag will be - * set upon dir open, and cleared when dir is closed, - * statahead hit ratio is too low, or start statahead - * thread failed. - */ - unsigned int lli_sa_enabled:1; - /* generation for statahead */ - unsigned int lli_sa_generation; - /* directory stripe information */ - struct lmv_stripe_md *lli_lsm_md; - /* default directory stripe offset. This is extracted - * from the "dmv" xattr in order to decide which MDT to - * create a subdirectory on. The MDS itself fetches - * "dmv" and gets the rest of the default layout itself - * (count, hash, etc). - */ - __u32 lli_def_stripe_offset; - }; - - /* for non-directory */ - struct { - struct mutex lli_size_mutex; - char *lli_symlink_name; - /* - * struct rw_semaphore { - * signed long count; // align d.d_def_acl - * spinlock_t wait_lock; // align d.d_sa_lock - * struct list_head wait_list; - * } - */ - struct rw_semaphore lli_trunc_sem; - struct range_lock_tree lli_write_tree; - - struct rw_semaphore lli_glimpse_sem; - unsigned long lli_glimpse_time; - struct list_head lli_agl_list; - __u64 lli_agl_index; - - /* for writepage() only to communicate to fsync */ - int lli_async_rc; - - /* - * whenever a process try to read/write the file, the - * jobid of the process will be saved here, and it'll - * be packed into the write PRC when flush later. - * - * so the read/write statistics for jobid will not be - * accurate if the file is shared by different jobs. - */ - char lli_jobid[LUSTRE_JOBID_SIZE]; - }; - }; - - /* XXX: For following frequent used members, although they maybe special - * used for non-directory object, it is some time-wasting to check - * whether the object is directory or not before using them. On the - * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce - * the "ll_inode_info" size even if moving those members into u.f. - * So keep them out side. - * - * In the future, if more members are added only for directory, - * some of the following members can be moved into u.f. - */ - struct cl_object *lli_clob; - - /* mutex to request for layout lock exclusively. */ - struct mutex lli_layout_mutex; - /* Layout version, protected by lli_layout_lock */ - __u32 lli_layout_gen; - spinlock_t lli_layout_lock; - - struct rw_semaphore lli_xattrs_list_rwsem; - struct mutex lli_xattrs_enq_lock; - struct list_head lli_xattrs;/* ll_xattr_entry->xe_list */ -}; - -static inline __u32 ll_layout_version_get(struct ll_inode_info *lli) -{ - __u32 gen; - - spin_lock(&lli->lli_layout_lock); - gen = lli->lli_layout_gen; - spin_unlock(&lli->lli_layout_lock); - - return gen; -} - -static inline void ll_layout_version_set(struct ll_inode_info *lli, __u32 gen) -{ - spin_lock(&lli->lli_layout_lock); - lli->lli_layout_gen = gen; - spin_unlock(&lli->lli_layout_lock); -} - -int ll_xattr_cache_destroy(struct inode *inode); - -int ll_xattr_cache_get(struct inode *inode, const char *name, - char *buffer, size_t size, __u64 valid); - -int ll_init_security(struct dentry *dentry, struct inode *inode, - struct inode *dir); - -/* - * Locking to guarantee consistency of non-atomic updates to long long i_size, - * consistency between file size and KMS. - * - * Implemented by ->lli_size_mutex and ->lsm_lock, nested in that order. - */ - -void ll_inode_size_lock(struct inode *inode); -void ll_inode_size_unlock(struct inode *inode); - -/* 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 64M of readahead on a given system. */ -#define SBI_DEFAULT_READAHEAD_MAX (64UL << (20 - PAGE_SHIFT)) - -/* default to read-ahead full files smaller than 2MB on the second read */ -#define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - 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, - RA_STAT_FAILED_REACH_END, - _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*/ - unsigned long ria_reserved; /* reserved pages for read-ahead */ - unsigned long ria_end_min; /* minimum end to cover current read */ - bool ria_eof; /* reach end of file */ - /* 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 */ -/* LL_SBI_RMT_CLIENT 0x40 remote client */ -#define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */ -#define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */ -#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 */ -/* LL_SBI_SOM_PREVIEW 0x1000 SOM preview mount option, obsolete */ -#define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */ -#define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */ -#define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */ -#define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */ -#define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */ -#define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */ -#define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */ -#define LL_SBI_NOROOTSQUASH 0x100000 /* do not apply root squash */ -#define LL_SBI_ALWAYS_PING 0x200000 /* always ping even if server - * suppress_pings - */ - -#define LL_SBI_FLAGS { \ - "nolck", \ - "checksum", \ - "flock", \ - "user_xattr", \ - "acl", \ - "???", \ - "???", \ - "mds_capa", \ - "oss_capa", \ - "flock", \ - "lru_resize", \ - "lazy_statfs", \ - "som", \ - "32bit_api", \ - "64bit_hash", \ - "agl", \ - "verbose", \ - "layout", \ - "user_fid2path",\ - "xattr_cache", \ - "norootsquash", \ - "always_ping", \ -} - -/* - * This is embedded into llite super-blocks to keep track of connect - * flags (capabilities) supported by all imports given mount is - * connected to. - */ -struct lustre_client_ocd { - /* - * This is conjunction of connect_flags across all imports - * (LOVs) this mount is connected to. This field is updated by - * cl_ocd_update() under ->lco_lock. - */ - __u64 lco_flags; - struct mutex lco_lock; - struct obd_export *lco_md_exp; - struct obd_export *lco_dt_exp; -}; - -struct ll_sb_info { - /* 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; /* pp_extent entry*/ - spinlock_t ll_process_lock; /* ll_rw_process_info */ - struct obd_uuid ll_sb_uuid; - struct obd_export *ll_md_exp; - struct obd_export *ll_dt_exp; - struct dentry *ll_debugfs_entry; - struct lu_fid ll_root_fid; /* root object fid */ - - int ll_flags; - unsigned int ll_umounting:1, - ll_xattr_cache_enabled:1, - ll_client_common_fill_super_succeeded:1; - - struct lustre_client_ocd ll_lco; - - struct lprocfs_stats *ll_stats; /* lprocfs stats counter */ - - /* - * Used to track "unstable" pages on a client, and maintain a - * LRU list of clean pages. An "unstable" page is defined as - * any page which is sent to a server as part of a bulk request, - * but is uncommitted to stable storage. - */ - struct cl_client_cache *ll_cache; - - struct lprocfs_stats *ll_ra_stats; - - struct ll_ra_info ll_ra_info; - unsigned int ll_namelen; - const struct file_operations *ll_fop; - - unsigned int ll_md_brw_pages; /* readdir pages per RPC */ - - 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; - int ll_stats_track_id; - enum stats_track_type ll_stats_track_type; - int ll_rw_stats_on; - - /* metadata stat-ahead */ - unsigned int ll_sa_max; /* max statahead RPCs */ - atomic_t ll_sa_total; /* statahead thread started - * count - */ - atomic_t ll_sa_wrong; /* statahead thread stopped for - * low hit ratio - */ - atomic_t ll_sa_running; /* running statahead thread - * count - */ - atomic_t ll_agl_total; /* AGL thread started count */ - - dev_t ll_sdev_orig; /* save s_dev before assign for - * clustered nfs - */ - /* root squash */ - struct root_squash_info ll_squash; - struct path ll_mnt; - - __kernel_fsid_t ll_fsid; - struct kobject ll_kobj; /* sysfs object */ - struct super_block *ll_sb; /* struct super_block (for sysfs code)*/ - struct completion ll_kobj_unregister; -}; - -/* - * 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; - /* - * Optimal RPC size. It decides how many pages will be sent - * for each read-ahead. - */ - unsigned long ras_rpc_size; - /* - * 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; - /* - * 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; -}; - -extern struct kmem_cache *ll_file_data_slab; -struct lustre_handle; -struct ll_file_data { - struct ll_readahead_state fd_ras; - struct ll_grouplock fd_grouplock; - __u64 lfd_pos; - __u32 fd_flags; - fmode_t fd_omode; - /* openhandle if lease exists for this file. - * Borrow lli->lli_och_mutex to protect assignment - */ - struct obd_client_handle *fd_lease_och; - struct obd_client_handle *fd_och; - struct file *fd_file; - /* Indicate whether need to report failure when close. - * true: failure is known, not report again. - * false: unknown failure, should report. - */ - bool fd_write_failed; - rwlock_t fd_lock; /* protect lcc list */ - struct list_head fd_lccs; /* list of ll_cl_context */ -}; - -extern struct dentry *llite_root; -extern struct kset *llite_kset; - -static inline struct inode *ll_info2i(struct ll_inode_info *lli) -{ - return &lli->lli_vfs_inode; -} - -__u32 ll_i2suppgid(struct inode *i); -void ll_i2gids(__u32 *suppgids, struct inode *i1, struct inode *i2); - -static inline int ll_need_32bit_api(struct ll_sb_info *sbi) -{ -#if BITS_PER_LONG == 32 - return 1; -#elif defined(CONFIG_COMPAT) - return unlikely(in_compat_syscall() || - (sbi->ll_flags & LL_SBI_32BIT_API)); -#else - return unlikely(sbi->ll_flags & LL_SBI_32BIT_API); -#endif -} - -void ll_ras_enter(struct file *f); - -/* llite/lcommon_misc.c */ -int cl_init_ea_size(struct obd_export *md_exp, struct obd_export *dt_exp); -int cl_ocd_update(struct obd_device *host, - struct obd_device *watched, - enum obd_notify_event ev, void *owner, void *data); -int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, - struct ll_grouplock *cg); -void cl_put_grouplock(struct ll_grouplock *cg); - -/* llite/lproc_llite.c */ -int ldebugfs_register_mountpoint(struct dentry *parent, - struct super_block *sb, char *osc, char *mdc); -void ldebugfs_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); -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); - -enum { - LPROC_LL_DIRTY_HITS, - LPROC_LL_DIRTY_MISSES, - LPROC_LL_READ_BYTES, - LPROC_LL_WRITE_BYTES, - LPROC_LL_BRW_READ, - LPROC_LL_BRW_WRITE, - LPROC_LL_IOCTL, - LPROC_LL_OPEN, - LPROC_LL_RELEASE, - LPROC_LL_MAP, - LPROC_LL_LLSEEK, - LPROC_LL_FSYNC, - LPROC_LL_READDIR, - LPROC_LL_SETATTR, - LPROC_LL_TRUNC, - LPROC_LL_FLOCK, - LPROC_LL_GETATTR, - LPROC_LL_CREATE, - LPROC_LL_LINK, - LPROC_LL_UNLINK, - LPROC_LL_SYMLINK, - LPROC_LL_MKDIR, - LPROC_LL_RMDIR, - LPROC_LL_MKNOD, - LPROC_LL_RENAME, - LPROC_LL_STAFS, - LPROC_LL_ALLOC_INODE, - LPROC_LL_SETXATTR, - LPROC_LL_GETXATTR, - LPROC_LL_GETXATTR_HITS, - LPROC_LL_LISTXATTR, - LPROC_LL_REMOVEXATTR, - LPROC_LL_INODE_PERM, - LPROC_LL_FILE_OPCODES -}; - -/* llite/dir.c */ -extern const struct file_operations ll_dir_operations; -extern const struct inode_operations ll_dir_inode_operations; -int ll_dir_read(struct inode *inode, __u64 *ppos, struct md_op_data *op_data, - struct dir_context *ctx); -int ll_get_mdt_idx(struct inode *inode); -int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid); -struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data, - __u64 offset); -void ll_release_page(struct inode *inode, struct page *page, bool remove); - -/* llite/namei.c */ -extern const struct inode_operations ll_special_inode_operations; - -struct inode *ll_iget(struct super_block *sb, ino_t hash, - struct lustre_md *lic); -int ll_test_inode_by_fid(struct inode *inode, void *opaque); -int ll_md_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, - void *data, int flag); -struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de); -void ll_update_times(struct ptlrpc_request *request, struct inode *inode); - -/* llite/rw.c */ -int ll_writepage(struct page *page, struct writeback_control *wbc); -int ll_writepages(struct address_space *mapping, struct writeback_control *wbc); -int ll_readpage(struct file *file, struct page *page); -void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras); -int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io); -struct ll_cl_context *ll_cl_find(struct file *file); -void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io); -void ll_cl_remove(struct file *file, const struct lu_env *env); - -extern const struct address_space_operations ll_aops; - -/* llite/file.c */ -extern const struct file_operations ll_file_operations; -extern const struct file_operations ll_file_operations_flock; -extern const struct file_operations ll_file_operations_noflock; -extern const struct inode_operations ll_file_inode_operations; -int ll_have_md_lock(struct inode *inode, __u64 *bits, - enum ldlm_mode l_req_mode); -enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits, - struct lustre_handle *lockh, __u64 flags, - enum ldlm_mode mode); -int ll_file_open(struct inode *inode, struct file *file); -int ll_file_release(struct inode *inode, struct file *file); -int ll_release_openhandle(struct inode *inode, struct lookup_intent *it); -int ll_md_real_close(struct inode *inode, fmode_t fmode); -int ll_getattr(const struct path *path, struct kstat *stat, - u32 request_mask, unsigned int flags); -struct posix_acl *ll_get_acl(struct inode *inode, int type); -int ll_migrate(struct inode *parent, struct file *file, int mdtidx, - const char *name, int namelen); -int ll_get_fid_by_name(struct inode *parent, const char *name, - int namelen, struct lu_fid *fid, struct inode **inode); -int ll_inode_permission(struct inode *inode, int mask); - -int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry, - __u64 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, void **lmmp, int *lmm_size, - struct ptlrpc_request **request, u64 valid); -int ll_fsync(struct file *file, loff_t start, loff_t end, int data); -int ll_merge_attr(const struct lu_env *env, struct inode *inode); -int ll_fid2path(struct inode *inode, void __user *arg); -int ll_data_version(struct inode *inode, __u64 *data_version, int flags); -int ll_hsm_release(struct inode *inode); -int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss); - -/* llite/dcache.c */ - -extern const struct dentry_operations ll_d_ops; -void ll_intent_drop_lock(struct lookup_intent *it); -void ll_intent_release(struct lookup_intent *it); -void ll_invalidate_aliases(struct inode *inode); -void ll_lookup_finish_locks(struct lookup_intent *it, struct inode *inode); -int ll_revalidate_it_finish(struct ptlrpc_request *request, - struct lookup_intent *it, struct inode *inode); - -/* llite/llite_lib.c */ -extern struct super_operations lustre_super_operations; - -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); -struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock); -void ll_dir_clear_lsm_md(struct inode *inode); -void ll_clear_inode(struct inode *inode); -int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, bool hsm_import); -int ll_setattr(struct dentry *de, struct iattr *attr); -int ll_statfs(struct dentry *de, struct kstatfs *sfs); -int ll_statfs_internal(struct super_block *sb, struct obd_statfs *osfs, - __u64 max_age, __u32 flags); -int ll_update_inode(struct inode *inode, struct lustre_md *md); -int 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); -void ll_umount_begin(struct super_block *sb); -int ll_remount_fs(struct super_block *sb, int *flags, char *data); -int ll_show_options(struct seq_file *seq, struct dentry *dentry); -void ll_dirty_page_discard_warn(struct page *page, int ioret); -int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req, - struct super_block *sb, struct lookup_intent *it); -int ll_obd_statfs(struct inode *inode, void __user *arg); -int ll_get_max_mdsize(struct ll_sb_info *sbi, int *max_mdsize); -int ll_get_default_mdsize(struct ll_sb_info *sbi, int *default_mdsize); -int ll_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize); -int ll_process_config(struct lustre_cfg *lcfg); - -enum { - LUSTRE_OPC_MKDIR = 0, - LUSTRE_OPC_SYMLINK = 1, - LUSTRE_OPC_MKNOD = 2, - LUSTRE_OPC_CREATE = 3, - LUSTRE_OPC_ANY = 5, -}; - -struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data, - struct inode *i1, struct inode *i2, - const char *name, size_t namelen, - u32 mode, __u32 opc, void *data); -void ll_finish_md_op_data(struct md_op_data *op_data); -int ll_get_obd_name(struct inode *inode, unsigned int cmd, unsigned long arg); -char *ll_get_fsname(struct super_block *sb, char *buf, int buflen); -void ll_compute_rootsquash_state(struct ll_sb_info *sbi); -void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req); -ssize_t ll_copy_user_md(const struct lov_user_md __user *md, - struct lov_user_md **kbuf); - -/* Compute expected user md size when passing in a md from user space */ -static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum) -{ - switch (lum->lmm_magic) { - case LOV_USER_MAGIC_V1: - return sizeof(struct lov_user_md_v1); - case LOV_USER_MAGIC_V3: - return sizeof(struct lov_user_md_v3); - case LOV_USER_MAGIC_SPECIFIC: - if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT) - return -EINVAL; - - return lov_user_md_size(lum->lmm_stripe_count, - LOV_USER_MAGIC_SPECIFIC); - } - return -EINVAL; -} - -/* llite/llite_nfs.c */ -extern const struct export_operations lustre_export_operations; -__u32 get_uuid2int(const char *name, int len); -void get_uuid2fsid(const char *name, int len, __kernel_fsid_t *fsid); -struct inode *search_inode_for_lustre(struct super_block *sb, - const struct lu_fid *fid); -int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid); - -/* llite/symlink.c */ -extern const struct inode_operations ll_fast_symlink_inode_operations; - -/** - * IO arguments for various VFS I/O interfaces. - */ -struct vvp_io_args { - /** normal/splice */ - union { - struct { - struct kiocb *via_iocb; - struct iov_iter *via_iter; - } normal; - } u; -}; - -struct ll_cl_context { - struct list_head lcc_list; - void *lcc_cookie; - const struct lu_env *lcc_env; - struct cl_io *lcc_io; - struct cl_page *lcc_page; -}; - -struct ll_thread_info { - struct vvp_io_args lti_args; - struct ra_io_arg lti_ria; - struct ll_cl_context lti_io_ctx; -}; - -extern struct lu_context_key ll_thread_key; -static inline struct ll_thread_info *ll_env_info(const struct lu_env *env) -{ - struct ll_thread_info *lti; - - lti = lu_context_key_get(&env->le_ctx, &ll_thread_key); - LASSERT(lti); - return lti; -} - -static inline struct vvp_io_args *ll_env_args(const struct lu_env *env) -{ - return &ll_env_info(env)->lti_args; -} - -/* llite/llite_mmap.c */ - -int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last); -int ll_file_mmap(struct file *file, struct vm_area_struct *vma); -void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma, - unsigned long addr, size_t count); -struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr, - size_t count); - -static inline void ll_invalidate_page(struct page *vmpage) -{ - struct address_space *mapping = vmpage->mapping; - loff_t offset = vmpage->index << PAGE_SHIFT; - - LASSERT(PageLocked(vmpage)); - if (!mapping) - return; - - /* - * truncate_complete_page() calls - * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete(). - */ - ll_teardown_mmaps(mapping, offset, offset + PAGE_SIZE); - truncate_complete_page(mapping, vmpage); -} - -#define ll_s2sbi(sb) (s2lsi(sb)->lsi_llsbi) - -/* 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) - 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); - fid = &ll_i2info(inode)->lli_fid; - - return fid; -} - -static inline loff_t ll_file_maxbytes(struct inode *inode) -{ - struct cl_object *obj = ll_i2info(inode)->lli_clob; - - if (!obj) - return MAX_LFS_FILESIZE; - - return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE); -} - -/* llite/xattr.c */ -extern const struct xattr_handler *ll_xattr_handlers[]; - -#define XATTR_USER_T 1 -#define XATTR_TRUSTED_T 2 -#define XATTR_SECURITY_T 3 -#define XATTR_ACL_ACCESS_T 4 -#define XATTR_ACL_DEFAULT_T 5 -#define XATTR_LUSTRE_T 6 -#define XATTR_OTHER_T 7 - -ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size); -int ll_xattr_list(struct inode *inode, const char *name, int type, - void *buffer, size_t size, __u64 valid); -const struct xattr_handler *get_xattr_type(const char *name); - -/** - * 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); - -enum ras_update_flags { - LL_RAS_HIT = 0x1, - LL_RAS_MMAP = 0x2 -}; -void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len); -void ll_ra_stats_inc(struct inode *inode, enum ra_stat which); - -/* statahead.c */ -#define LL_SA_RPC_MIN 2 -#define LL_SA_RPC_DEF 32 -#define LL_SA_RPC_MAX 8192 - -#define LL_SA_CACHE_BIT 5 -#define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT) -#define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1) - -/* per inode struct, for dir only */ -struct ll_statahead_info { - struct dentry *sai_dentry; - atomic_t sai_refcount; /* when access this struct, hold - * refcount - */ - unsigned int sai_max; /* max ahead of lookup */ - __u64 sai_sent; /* stat requests sent count */ - __u64 sai_replied; /* stat requests which received - * reply - */ - __u64 sai_index; /* index of statahead entry */ - __u64 sai_index_wait; /* index of entry which is the - * caller is waiting for - */ - __u64 sai_hit; /* hit count */ - __u64 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 - */ - sai_agl_valid:1,/* AGL is valid for the dir */ - sai_in_readpage:1;/* statahead in readdir() */ - wait_queue_head_t sai_waitq; /* stat-ahead wait queue */ - struct task_struct *sai_task; /* stat-ahead thread */ - struct task_struct *sai_agl_task; /* AGL thread */ - struct list_head sai_interim_entries; /* entries which got async - * stat reply, but not - * instantiated - */ - struct list_head sai_entries; /* completed entries */ - struct list_head sai_agls; /* AGLs to be sent */ - struct list_head sai_cache[LL_SA_CACHE_SIZE]; - spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE]; - atomic_t sai_cache_count; /* entry count in cache */ -}; - -int ll_statahead(struct inode *dir, struct dentry **dentry, bool unplug); -void ll_authorize_statahead(struct inode *dir, void *key); -void ll_deauthorize_statahead(struct inode *dir, void *key); - -blkcnt_t dirty_cnt(struct inode *inode); - -int cl_glimpse_size0(struct inode *inode, int agl); -int cl_glimpse_lock(const struct lu_env *env, struct cl_io *io, - struct inode *inode, struct cl_object *clob, int agl); - -static inline int cl_glimpse_size(struct inode *inode) -{ - return cl_glimpse_size0(inode, 0); -} - -static inline int cl_agl(struct inode *inode) -{ - return cl_glimpse_size0(inode, 1); -} - -static inline int ll_glimpse_size(struct inode *inode) -{ - struct ll_inode_info *lli = ll_i2info(inode); - int rc; - - down_read(&lli->lli_glimpse_sem); - rc = cl_glimpse_size(inode); - lli->lli_glimpse_time = cfs_time_current(); - up_read(&lli->lli_glimpse_sem); - return rc; -} - -/* - * dentry may statahead when statahead is enabled and current process has opened - * parent directory, and this dentry hasn't accessed statahead cache before - */ -static inline bool -dentry_may_statahead(struct inode *dir, struct dentry *dentry) -{ - struct ll_inode_info *lli; - struct ll_dentry_data *ldd; - - if (ll_i2sbi(dir)->ll_sa_max == 0) - return false; - - lli = ll_i2info(dir); - - /* - * statahead is not allowed for this dir, there may be three causes: - * 1. dir is not opened. - * 2. statahead hit ratio is too low. - * 3. previous stat started statahead thread failed. - */ - if (!lli->lli_sa_enabled) - return false; - - /* not the same process, don't statahead */ - if (lli->lli_opendir_pid != current_pid()) - return false; - - /* - * When stating a dentry, kernel may trigger 'revalidate' or 'lookup' - * multiple times, eg. for 'getattr', 'getxattr' and etc. - * For patchless client, lookup intent is not accurate, which may - * misguide statahead. For example: - * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will - * have the same intent -- IT_GETATTR, while one dentry should access - * statahead cache once, otherwise statahead windows is messed up. - * The solution is as following: - * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry - * IT_GETATTR for the first time, and subsequent IT_GETATTR will - * bypass interacting with statahead cache by checking - * 'lld_sa_generation == lli->lli_sa_generation'. - */ - ldd = ll_d2d(dentry); - if (ldd->lld_sa_generation == lli->lli_sa_generation) - return false; - - return true; -} - -/* llite ioctl register support routine */ -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 value 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); - -/* 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 value: - * 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); - -int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end, - enum cl_fsync_mode mode, int ignore_layout); - -/** 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; -}; - -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); - -static inline int ll_file_nolock(const struct file *file) -{ - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - struct inode *inode = file_inode(file); - - return ((fd->fd_flags & LL_FILE_IGNORE_LOCK) || - (ll_i2sbi(inode)->ll_flags & LL_SBI_NOLCK)); -} - -static inline void ll_set_lock_data(struct obd_export *exp, struct inode *inode, - struct lookup_intent *it, __u64 *bits) -{ - if (!it->it_lock_set) { - struct lustre_handle handle; - - /* If this inode is a remote object, it will get two - * separate locks in different namespaces, Master MDT, - * where the name entry is, will grant LOOKUP lock, - * remote MDT, where the object is, will grant - * UPDATE|PERM lock. The inode will be attached to both - * LOOKUP and PERM locks, so revoking either locks will - * case the dcache being cleared - */ - if (it->it_remote_lock_mode) { - handle.cookie = it->it_remote_lock_handle; - CDEBUG(D_DLMTRACE, "setting l_data to inode " DFID "%p for remote lock %#llx\n", - PFID(ll_inode2fid(inode)), inode, - handle.cookie); - md_set_lock_data(exp, &handle, inode, NULL); - } - - handle.cookie = it->it_lock_handle; - - CDEBUG(D_DLMTRACE, - "setting l_data to inode " DFID "%p for lock %#llx\n", - PFID(ll_inode2fid(inode)), inode, handle.cookie); - - md_set_lock_data(exp, &handle, inode, &it->it_lock_bits); - it->it_lock_set = 1; - } - - if (bits) - *bits = it->it_lock_bits; -} - -static inline int d_lustre_invalid(const struct dentry *dentry) -{ - return ll_d2d(dentry)->lld_invalid; -} - -/* - * Mark dentry INVALID, if dentry refcount is zero (this is normally case for - * ll_md_blocking_ast), unhash this dentry, and let dcache to reclaim it later; - * else dput() of the last refcount will unhash this dentry and kill it. - */ -static inline void d_lustre_invalidate(struct dentry *dentry, int nested) -{ - CDEBUG(D_DENTRY, - "invalidate dentry %pd (%p) parent %p inode %p refc %d\n", - dentry, dentry, - dentry->d_parent, d_inode(dentry), d_count(dentry)); - - spin_lock_nested(&dentry->d_lock, - nested ? DENTRY_D_LOCK_NESTED : DENTRY_D_LOCK_NORMAL); - ll_d2d(dentry)->lld_invalid = 1; - if (d_count(dentry) == 0) - __d_drop(dentry); - spin_unlock(&dentry->d_lock); -} - -static inline void d_lustre_revalidate(struct dentry *dentry) -{ - spin_lock(&dentry->d_lock); - LASSERT(ll_d2d(dentry)); - ll_d2d(dentry)->lld_invalid = 0; - spin_unlock(&dentry->d_lock); -} - -int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf); -int ll_layout_refresh(struct inode *inode, __u32 *gen); -int ll_layout_restore(struct inode *inode, loff_t start, __u64 length); - -int ll_xattr_init(void); -void ll_xattr_fini(void); - -int ll_page_sync_io(const struct lu_env *env, struct cl_io *io, - struct cl_page *page, enum cl_req_type crt); - -int ll_getparent(struct file *file, struct getparent __user *arg); - -/* lcommon_cl.c */ -int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr, - unsigned int attr_flags); - -extern struct lu_env *cl_inode_fini_env; -extern u16 cl_inode_fini_refcheck; - -int cl_file_inode_init(struct inode *inode, struct lustre_md *md); -void cl_inode_fini(struct inode *inode); - -__u64 cl_fid_build_ino(const struct lu_fid *fid, int api32); -__u32 cl_fid_build_gen(const struct lu_fid *fid); - -#endif /* LLITE_INTERNAL_H */ |