| /* |
| * 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 "../include/lustre_debug.h" |
| #include "../include/lustre_ver.h" |
| #include "../include/lustre_disk.h" /* for s2sbi */ |
| #include "../include/lustre_eacl.h" |
| |
| /* for struct cl_lock_descr and struct cl_io */ |
| #include "../include/cl_object.h" |
| #include "../include/lustre_mdc.h" |
| #include "../include/lustre_intent.h" |
| #include <linux/compat.h> |
| #include <linux/posix_acl_xattr.h> |
| #include "vvp_internal.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 |
| |
| #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; |
| 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 a 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 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 data is modified. */ |
| LLIF_DATA_MODIFIED = (1 << 4), |
| /* File is being restored */ |
| LLIF_FILE_RESTORING = (1 << 5), |
| /* Xattr cache is attached to the file */ |
| LLIF_XATTR_CACHE = (1 << 6), |
| }; |
| |
| struct ll_inode_info { |
| __u32 lli_inode_magic; |
| __u32 lli_flags; |
| __u64 lli_ioepoch; |
| |
| spinlock_t lli_lock; |
| struct posix_acl *lli_posix_acl; |
| |
| /* identifying fields for both metadata and data stacks. */ |
| struct lu_fid lli_fid; |
| /* Parent fid for accessing default stripe data on parent directory |
| * for allocating OST objects after a mknod() and later open-by-FID. |
| */ |
| struct lu_fid lli_pfid; |
| |
| 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; |
| |
| /* 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 d_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 *d_opendir_key; |
| struct ll_statahead_info *d_sai; |
| /* protect statahead stuff. */ |
| spinlock_t d_sa_lock; |
| /* "opendir_pid" is the token when lookup/revalidate |
| * -- I am the owner of dir statahead. |
| */ |
| pid_t d_opendir_pid; |
| } d; |
| |
| #define lli_readdir_mutex u.d.d_readdir_mutex |
| #define lli_opendir_key u.d.d_opendir_key |
| #define lli_sai u.d.d_sai |
| #define lli_sa_lock u.d.d_sa_lock |
| #define lli_opendir_pid u.d.d_opendir_pid |
| |
| /* for non-directory */ |
| struct { |
| struct mutex f_size_mutex; |
| char *f_symlink_name; |
| __u64 f_maxbytes; |
| /* |
| * 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 f_trunc_sem; |
| struct mutex f_write_mutex; |
| |
| struct rw_semaphore f_glimpse_sem; |
| unsigned long f_glimpse_time; |
| struct list_head f_agl_list; |
| __u64 f_agl_index; |
| |
| /* for writepage() only to communicate to fsync */ |
| int f_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 f_jobid[JOBSTATS_JOBID_SIZE]; |
| } f; |
| |
| #define lli_size_mutex u.f.f_size_mutex |
| #define lli_symlink_name u.f.f_symlink_name |
| #define lli_maxbytes u.f.f_maxbytes |
| #define lli_trunc_sem u.f.f_trunc_sem |
| #define lli_write_mutex u.f.f_write_mutex |
| #define lli_glimpse_sem u.f.f_glimpse_sem |
| #define lli_glimpse_time u.f.f_glimpse_time |
| #define lli_agl_list u.f.f_agl_list |
| #define lli_agl_index u.f.f_agl_index |
| #define lli_async_rc u.f.f_async_rc |
| #define lli_jobid u.f.f_jobid |
| |
| } u; |
| |
| /* 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. |
| */ |
| bool lli_has_smd; |
| 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); |
| |
| /* |
| * 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 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 - 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*/ |
| /* 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 */ |
| #define LL_SBI_SOM_PREVIEW 0x1000 /* SOM preview mount option */ |
| #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_FLAGS { \ |
| "nolck", \ |
| "checksum", \ |
| "flock", \ |
| "xattr", \ |
| "acl", \ |
| "???", \ |
| "???", \ |
| "mds_capa", \ |
| "oss_capa", \ |
| "flock", \ |
| "lru_resize", \ |
| "lazy_statfs", \ |
| "som", \ |
| "32bit_api", \ |
| "64bit_hash", \ |
| "agl", \ |
| "verbose", \ |
| "layout", \ |
| "user_fid2path",\ |
| "xattr", \ |
| } |
| |
| 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; |
| struct lustre_client_ocd ll_lco; |
| |
| struct ll_close_queue *ll_lcq; |
| |
| 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; |
| struct file_operations *ll_fop; |
| |
| unsigned int ll_md_brw_size; /* used by readdir */ |
| |
| 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_agl_total; /* AGL thread started count */ |
| |
| dev_t ll_sdev_orig; /* save s_dev before assign for |
| * clustered nfs |
| */ |
| __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; |
| /* |
| * 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 */ |
| }; |
| |
| struct lov_stripe_md; |
| |
| 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); |
| |
| /* llite/dir.c */ |
| void ll_release_page(struct page *page, int remove); |
| extern const struct file_operations ll_dir_operations; |
| extern const struct inode_operations ll_dir_inode_operations; |
| struct page *ll_get_dir_page(struct inode *dir, __u64 hash, |
| struct ll_dir_chain *chain); |
| int ll_dir_read(struct inode *inode, struct dir_context *ctx); |
| |
| int ll_get_mdt_idx(struct inode *inode); |
| /* llite/namei.c */ |
| extern const struct inode_operations ll_special_inode_operations; |
| |
| 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); |
| struct dentry *ll_splice_alias(struct inode *inode, struct dentry *de); |
| |
| /* llite/rw.c */ |
| int ll_writepage(struct page *page, struct writeback_control *wbc); |
| int ll_writepages(struct address_space *, 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 ll_readahead(const struct lu_env *env, struct cl_io *io, |
| struct cl_page_list *queue, struct ll_readahead_state *ras, |
| bool hit); |
| 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 struct file_operations ll_file_operations; |
| extern struct file_operations ll_file_operations_flock; |
| extern 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_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_release_openhandle(struct inode *, struct lookup_intent *); |
| int ll_md_real_close(struct inode *inode, fmode_t fmode); |
| void ll_ioepoch_close(struct inode *inode, struct md_op_data *op_data, |
| struct obd_client_handle **och, unsigned long flags); |
| void ll_done_writing_attr(struct inode *inode, struct md_op_data *op_data); |
| int ll_som_update(struct inode *inode, struct md_op_data *op_data); |
| int ll_inode_getattr(struct inode *inode, struct obdo *obdo, |
| __u64 ioepoch, int sync); |
| void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data, |
| struct lustre_handle *fh); |
| int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat); |
| struct posix_acl *ll_get_acl(struct inode *inode, int type); |
| |
| 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, struct lov_mds_md **lmmp, |
| int *lmm_size, struct ptlrpc_request **request); |
| 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); |
| |
| /* llite/dcache.c */ |
| |
| int ll_d_init(struct dentry *de); |
| extern const struct dentry_operations ll_d_ops; |
| void ll_intent_drop_lock(struct lookup_intent *); |
| void ll_intent_release(struct lookup_intent *); |
| void ll_invalidate_aliases(struct 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, struct vfsmount *mnt); |
| 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_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); |
| 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); |
| 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 *, struct lookup_intent *); |
| 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_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); |
| 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_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req); |
| |
| /* 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); |
| |
| /* llite/symlink.c */ |
| extern const 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; |
| }; |
| |
| void vvp_write_pending(struct vvp_object *club, struct vvp_page *page); |
| void vvp_write_complete(struct vvp_object *club, struct vvp_page *page); |
| |
| /** |
| * IO arguments for various VFS I/O interfaces. |
| */ |
| struct vvp_io_args { |
| /** normal/splice */ |
| enum vvp_io_subtype via_io_subtype; |
| |
| union { |
| struct { |
| struct kiocb *via_iocb; |
| struct iov_iter *via_iter; |
| } normal; |
| struct { |
| struct pipe_inode_info *via_pipe; |
| unsigned int via_flags; |
| } splice; |
| } 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, |
| enum vvp_io_subtype type) |
| { |
| struct vvp_io_args *via = &ll_env_info(env)->lti_args; |
| |
| via->via_io_subtype = type; |
| |
| return via; |
| } |
| |
| 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 */ |
| |
| 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(ldlm_policy_data_t *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 __u64 ll_file_maxbytes(struct inode *inode) |
| { |
| return ll_i2info(inode)->lli_maxbytes; |
| } |
| |
| /* llite/xattr.c */ |
| int ll_setxattr(struct dentry *dentry, struct inode *inode, |
| const char *name, const void *value, size_t size, int flags); |
| ssize_t ll_getxattr(struct dentry *dentry, struct inode *inode, |
| 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); |
| |
| /** |
| * 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); |
| 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); |
| 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 inode *sai_inode; |
| atomic_t sai_refcount; /* when access this struct, hold |
| * refcount |
| */ |
| unsigned int sai_generation; /* generation for statahead */ |
| 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 */ |
| wait_queue_head_t sai_waitq; /* stat-ahead wait queue */ |
| struct ptlrpc_thread sai_thread; /* stat-ahead thread */ |
| struct ptlrpc_thread sai_agl_thread; /* AGL thread */ |
| struct list_head sai_entries; /* entry list */ |
| struct list_head sai_entries_received; /* entries returned */ |
| struct list_head sai_entries_stated; /* entries stated */ |
| struct list_head sai_entries_agl; /* AGL entries 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 do_statahead_enter(struct inode *dir, struct dentry **dentry, |
| int only_unplug); |
| void ll_stop_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; |
| } |
| |
| static inline void |
| ll_statahead_mark(struct inode *dir, struct dentry *dentry) |
| { |
| struct ll_inode_info *lli = ll_i2info(dir); |
| struct ll_statahead_info *sai = lli->lli_sai; |
| struct ll_dentry_data *ldd = ll_d2d(dentry); |
| |
| /* not the same process, don't mark */ |
| if (lli->lli_opendir_pid != current_pid()) |
| return; |
| |
| LASSERT(ldd); |
| if (sai) |
| ldd->lld_sa_generation = sai->sai_generation; |
| } |
| |
| static inline int |
| d_need_statahead(struct inode *dir, struct dentry *dentryp) |
| { |
| struct ll_inode_info *lli; |
| struct ll_dentry_data *ldd; |
| |
| if (ll_i2sbi(dir)->ll_sa_max == 0) |
| return -EAGAIN; |
| |
| lli = ll_i2info(dir); |
| /* not the same process, don't statahead */ |
| if (lli->lli_opendir_pid != current_pid()) |
| return -EAGAIN; |
| |
| /* statahead has been stopped */ |
| if (!lli->lli_opendir_key) |
| return -EAGAIN; |
| |
| ldd = ll_d2d(dentryp); |
| /* |
| * When stats 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, |
| * which 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 1; |
| } |
| |
| static inline int |
| ll_statahead_enter(struct inode *dir, struct dentry **dentryp, int only_unplug) |
| { |
| int ret; |
| |
| ret = d_need_statahead(dir, *dentryp); |
| if (ret <= 0) |
| return ret; |
| |
| return do_statahead_enter(dir, dentryp, only_unplug); |
| } |
| |
| /* 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; |
| }; |
| |
| static inline void cl_stats_tally(struct cl_device *dev, enum cl_req_type crt, |
| int rc) |
| { |
| int opc = (crt == CRT_READ) ? LPROC_LL_OSC_READ : |
| LPROC_LL_OSC_WRITE; |
| |
| ll_stats_ops_tally(ll_s2sbi(cl2vvp_dev(dev)->vdv_sb), opc, rc); |
| } |
| |
| 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->d.lustre.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->d.lustre.it_remote_lock_mode) { |
| handle.cookie = it->d.lustre.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.cookie, inode, NULL); |
| } |
| |
| handle.cookie = it->d.lustre.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.cookie, inode, |
| &it->d.lustre.it_lock_bits); |
| it->d.lustre.it_lock_set = 1; |
| } |
| |
| if (bits) |
| *bits = it->d.lustre.it_lock_bits; |
| } |
| |
| static inline void ll_lock_dcache(struct inode *inode) |
| { |
| spin_lock(&inode->i_lock); |
| } |
| |
| static inline void ll_unlock_dcache(struct inode *inode) |
| { |
| spin_unlock(&inode->i_lock); |
| } |
| |
| static inline int d_lustre_invalid(const struct dentry *dentry) |
| { |
| struct ll_dentry_data *lld = ll_d2d(dentry); |
| |
| return !lld || lld->lld_invalid; |
| } |
| |
| static inline void __d_lustre_invalidate(struct dentry *dentry) |
| { |
| struct ll_dentry_data *lld = ll_d2d(dentry); |
| |
| if (lld) |
| lld->lld_invalid = 1; |
| } |
| |
| /* |
| * 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); |
| __d_lustre_invalidate(dentry); |
| /* |
| * We should be careful about dentries created by d_obtain_alias(). |
| * These dentries are not put in the dentry tree, instead they are |
| * linked to sb->s_anon through dentry->d_hash. |
| * shrink_dcache_for_umount() shrinks the tree and sb->s_anon list. |
| * If we unhashed such a dentry, unmount would not be able to find |
| * it and busy inodes would be reported. |
| */ |
| if (d_count(dentry) == 0 && !(dentry->d_flags & DCACHE_DISCONNECTED)) |
| __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); |
| } |
| |
| enum { |
| LL_LAYOUT_GEN_NONE = ((__u32)-2), /* layout lock was cancelled */ |
| LL_LAYOUT_GEN_EMPTY = ((__u32)-1) /* for empty layout */ |
| }; |
| |
| 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); |
| |
| /* lcommon_cl.c */ |
| int cl_setattr_ost(struct inode *inode, const struct iattr *attr); |
| |
| extern struct lu_env *cl_inode_fini_env; |
| extern int cl_inode_fini_refcheck; |
| |
| int cl_file_inode_init(struct inode *inode, struct lustre_md *md); |
| void cl_inode_fini(struct inode *inode); |
| int cl_local_size(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 */ |