--- /dev/null
+/*
+ * 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 (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, 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/lclient.h"
+#include "../include/lustre_mdc.h"
+#include "../include/lustre_intent.h"
+#include <linux/compat.h>
+#include <linux/posix_acl_xattr.h>
+
+#ifndef FMODE_EXEC
+#define FMODE_EXEC 0
+#endif
+
+#ifndef VM_FAULT_RETRY
+#define VM_FAULT_RETRY 0
+#endif
+
+/* Kernel 3.1 kills LOOKUP_CONTINUE, LOOKUP_PARENT is equivalent to it.
+ * seem kernel commit 49084c3bb2055c401f3493c13edae14d49128ca0 */
+#ifndef LOOKUP_CONTINUE
+#define LOOKUP_CONTINUE LOOKUP_PARENT
+#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
+
+/* remote client permission cache */
+#define REMOTE_PERM_HASHSIZE 16
+
+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? */
+};
+
+/* 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 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;
+
+ struct hlist_head *lli_remote_perms;
+ struct mutex lli_rmtperm_mutex;
+
+ /* 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;
+ struct list_head lli_oss_capas;
+ /* open count currently used by capability only, indicate whether
+ * capability needs renewal */
+ atomic_t lli_open_count;
+ struct obd_capa *lli_mds_capa;
+ unsigned long lli_rmtperm_time;
+
+ /* 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 */
+ struct ost_lvb lli_lvb;
+ 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/revalid
+ * -- 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_CACHE_SHIFT))
+
+/* default to read-ahead full files smaller than 2MB on the second read */
+#define SBI_DEFAULT_READAHEAD_WHOLE_MAX (2UL << (20 - PAGE_CACHE_SHIFT))
+
+enum ra_stat {
+ RA_STAT_HIT = 0,
+ RA_STAT_MISS,
+ RA_STAT_DISTANT_READPAGE,
+ RA_STAT_MISS_IN_WINDOW,
+ RA_STAT_FAILED_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_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 */
+#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", \
+ "???", \
+ "rmt_client", \
+ "mds_capa", \
+ "oss_capa", \
+ "flock", \
+ "lru_resize", \
+ "lazy_statfs", \
+ "som", \
+ "32bit_api", \
+ "64bit_hash", \
+ "agl", \
+ "verbose", \
+ "layout", \
+ "user_fid2path",\
+ "xattr", \
+}
+
+#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_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; /* 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 proc_dir_entry* ll_proc_root;
+ struct lu_fid ll_root_fid; /* root object fid */
+
+ int ll_flags;
+ unsigned int ll_umounting:1,
+ ll_xattr_cache_enabled:1;
+ 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 */
+
+ 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;
+
+ /* =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;
+ 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 */
+ struct rmtacl_ctl_table ll_rct;
+ struct eacl_table ll_et;
+ __kernel_fsid_t ll_fsid;
+};
+
+#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;
+};
+
+extern struct kmem_cache *ll_file_data_slab;
+struct lustre_handle;
+struct ll_file_data {
+ struct ll_readahead_state fd_ras;
+ struct ccc_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;
+};
+
+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;
+}
+
+__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(is_compat_task() || (sbi->ll_flags & LL_SBI_32BIT_API));
+#else
+ return unlikely(sbi->ll_flags & LL_SBI_32BIT_API);
+#endif
+}
+
+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 */
+#if defined (CONFIG_PROC_FS)
+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);
+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);
+#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 inline
+void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) {}
+static inline void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars)
+{
+ memset(lvars, 0, sizeof(*lvars));
+}
+static inline 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) {}
+#endif
+
+
+/* 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);
+int ll_rmdir_entry(struct inode *dir, char *name, int namelen);
+
+/* 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);
+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 ll_readahead_state *ras, struct address_space *mapping,
+ struct cl_page_list *queue, int flags);
+
+#ifndef MS_HAS_NEW_AOPS
+extern const struct address_space_operations ll_aops;
+#else
+extern const struct address_space_operations_ext ll_aops;
+#endif
+
+/* 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_have_md_lock(struct inode *inode, __u64 *bits,
+ ldlm_mode_t l_req_mode);
+extern ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits,
+ struct lustre_handle *lockh, __u64 flags,
+ ldlm_mode_t 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,
+ 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 **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_lvb(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 extent_lock);
+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 *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_get_max_cookiesize(struct ll_sb_info *sbi, int *max_cookiesize);
+int ll_get_default_cookiesize(struct ll_sb_info *sbi, int *default_cookiesize);
+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);
+
+/* llite/llite_nfs.c */
+extern 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 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 ccc_object *cl_inode2ccc(struct inode *inode);
+
+
+void vvp_write_pending (struct ccc_object *club, struct ccc_page *page);
+void vvp_write_complete(struct ccc_object *club, struct ccc_page *page);
+
+/* specific architecture can implement only part of this list */
+enum vvp_io_subtype {
+ /** normal IO */
+ IO_NORMAL,
+ /** io started from splice_{read|write} */
+ IO_SPLICE
+};
+
+/* IO subtypes */
+struct vvp_io {
+ /** io subtype */
+ enum vvp_io_subtype cui_io_subtype;
+
+ union {
+ struct {
+ struct pipe_inode_info *cui_pipe;
+ unsigned int cui_flags;
+ } splice;
+ struct vvp_fault_io {
+ /**
+ * Inode modification time that is checked across DLM
+ * lock request.
+ */
+ time_t ft_mtime;
+ struct vm_area_struct *ft_vma;
+ /**
+ * locked page returned from vvp_io
+ */
+ struct page *ft_vmpage;
+ struct vm_fault_api {
+ /**
+ * kernel fault info
+ */
+ struct vm_fault *ft_vmf;
+ /**
+ * fault API used bitflags for return code.
+ */
+ unsigned int ft_flags;
+ /**
+ * check that flags are from filemap_fault
+ */
+ bool ft_flags_valid;
+ } fault;
+ } 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;
+};
+
+/**
+ * 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 {
+ void *lcc_cookie;
+ struct cl_io *lcc_io;
+ struct cl_page *lcc_page;
+ struct lu_env *lcc_env;
+ int lcc_refcheck;
+};
+
+struct vvp_thread_info {
+ struct vvp_io_args vti_args;
+ struct ra_io_arg vti_ria;
+ struct ll_cl_context vti_io_ctx;
+};
+
+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;
+}
+
+static inline struct vvp_io_args *vvp_env_args(const struct lu_env *env,
+ enum vvp_io_subtype type)
+{
+ struct vvp_io_args *ret = &vvp_env_info(env)->vti_args;
+
+ ret->via_io_subtype = type;
+
+ return ret;
+}
+
+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;
+}
+
+int vvp_global_init(void);
+void vvp_global_fini(void);
+
+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_CACHE_SHIFT;
+
+ LASSERT(PageLocked(vmpage));
+ if (mapping == NULL)
+ return;
+
+ ll_teardown_mmaps(mapping, offset, offset + PAGE_CACHE_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 == 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;
+
+ 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, 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 struct kmem_cache *ll_remote_perm_cachep;
+extern struct kmem_cache *ll_rmtperm_hash_cachep;
+
+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_capa.c */
+extern struct timer_list 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);
+
+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);
+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 address_space *mapping, enum ra_stat which);
+
+/* llite/llite_rmtacl.c */
+#ifdef CONFIG_FS_POSIX_ACL
+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;
+};
+
+u64 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);
+#else
+static inline u64 rce_ops2valid(int ops)
+{
+ return 0;
+}
+#endif
+
+/* 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);
+
+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 != NULL);
+ if (sai != NULL)
+ 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 == NULL)
+ 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);
+
+
+/* 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
+
+static inline struct ll_file_data *cl_iattr2fd(struct inode *inode,
+ const struct iattr *attr)
+{
+ LASSERT(attr->ia_valid & ATTR_FILE);
+ return LUSTRE_FPRIVATE(attr->ia_file);
+}
+
+static inline void cl_isize_lock(struct inode *inode)
+{
+ ll_inode_size_lock(inode);
+}
+
+static inline void cl_isize_unlock(struct inode *inode)
+{
+ ll_inode_size_unlock(inode);
+}
+
+static inline void cl_isize_write_nolock(struct inode *inode, loff_t kms)
+{
+ LASSERT(mutex_is_locked(&ll_i2info(inode)->lli_size_mutex));
+ i_size_write(inode, kms);
+}
+
+static inline void cl_isize_write(struct inode *inode, loff_t kms)
+{
+ ll_inode_size_lock(inode);
+ i_size_write(inode, kms);
+ ll_inode_size_unlock(inode);
+}
+
+#define cl_isize_read(inode) i_size_read(inode)
+
+static inline int cl_merge_lvb(const struct lu_env *env, struct inode *inode)
+{
+ return ll_merge_lvb(env, 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);
+
+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(cl2ccc_dev(dev)->cdv_sb), opc, rc);
+}
+
+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);
+
+static inline int ll_file_nolock(const struct file *file)
+{
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ struct inode *inode = file_inode(file);
+
+ LASSERT(fd != NULL);
+ 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 %p(%lu/%u) for remote lock %#llx\n",
+ inode,
+ inode->i_ino, inode->i_generation,
+ 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 %p (%lu/%u) for lock %#llx\n",
+ inode, inode->i_ino,
+ inode->i_generation, 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 != NULL)
+ *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 == NULL) || lld->lld_invalid;
+}
+
+static inline void __d_lustre_invalidate(struct dentry *dentry)
+{
+ struct ll_dentry_data *lld = ll_d2d(dentry);
+
+ if (lld != NULL)
+ 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);
+ 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) != NULL);
+ 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);
+
+int ll_xattr_init(void);
+void ll_xattr_fini(void);
+
+#endif /* LLITE_INTERNAL_H */
Code Review / kvmfornfv.git / blobdiff