/* * 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, 2017, 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 /* for s2sbi */ #include #include /* for struct cl_lock_descr and struct cl_io */ #include #include #include #include #include #include #include #include #include "vvp_internal.h" #include "range_lock.h" #include "pcc.h" #ifndef FMODE_EXEC #define FMODE_EXEC 0 #endif #ifndef HAVE_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 /* 4UL * 1024 * 1024 */ #define LL_MAX_BLKSIZE_BITS 22 #define LL_IT2STR(it) ((it) ? ldlm_it2str((it)->it_op) : "0") #define TIMES_SET_FLAGS (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET) struct ll_dentry_data { unsigned int lld_sa_generation; unsigned int lld_invalid:1; unsigned int lld_nfs_dentry:1; struct rcu_head lld_rcu_head; }; #define ll_d2d(de) ((struct ll_dentry_data*)((de)->d_fsdata)) #define LLI_INODE_MAGIC 0x111d0de5 #define LLI_INODE_DEAD 0xdeadd00d struct ll_getname_data { #ifdef HAVE_DIR_CONTEXT struct dir_context ctx; #endif 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; }; /* See comment on trunc_sem_down_read_nowait */ struct ll_trunc_sem { /* when positive, this is a count of readers, when -1, it indicates * the semaphore is held for write, and 0 is unlocked */ atomic_t ll_trunc_readers; /* this tracks a count of waiting writers */ atomic_t ll_trunc_waiters; }; struct ll_inode_info { __u32 lli_inode_magic; spinlock_t lli_lock; volatile unsigned long lli_flags; struct posix_acl *lli_posix_acl; /* identifying fields for both metadata and data stacks. */ struct lu_fid lli_fid; /* master inode fid for stripe directory */ struct lu_fid lli_pfid; /* We need all three because every inode may be opened in different * modes */ struct obd_client_handle *lli_mds_read_och; struct obd_client_handle *lli_mds_write_och; struct obd_client_handle *lli_mds_exec_och; __u64 lli_open_fd_read_count; __u64 lli_open_fd_write_count; __u64 lli_open_fd_exec_count; /* Protects access to och pointers and their usage counters */ struct mutex lli_och_mutex; struct inode lli_vfs_inode; /* the most recent timestamps obtained from mds */ s64 lli_atime; s64 lli_mtime; s64 lli_ctime; s64 lli_btime; 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 { /* metadata statahead */ /* since parent-child threads can share the same @file * struct, "opendir_key" is the token when dir close for * case of parent exit before child -- it is me should * cleanup the dir readahead. */ void *lli_opendir_key; struct ll_statahead_info *lli_sai; /* protect statahead stuff. */ spinlock_t lli_sa_lock; /* "opendir_pid" is the token when lookup/revalid * -- I am the owner of dir statahead. */ pid_t lli_opendir_pid; /* stat will try to access statahead entries or start * statahead if this flag is set, and this flag will be * set upon dir open, and cleared when dir is closed, * statahead hit ratio is too low, or start statahead * thread failed. */ unsigned int lli_sa_enabled:1; /* generation for statahead */ unsigned int lli_sa_generation; /* rw lock protects lli_lsm_md */ struct rw_semaphore lli_lsm_sem; /* directory stripe information */ struct lmv_stripe_md *lli_lsm_md; /* directory default LMV */ struct lmv_stripe_md *lli_default_lsm_md; }; /* for non-directory */ struct { struct mutex lli_size_mutex; char *lli_symlink_name; struct ll_trunc_sem lli_trunc_sem; struct range_lock_tree lli_write_tree; struct mutex lli_setattr_mutex; struct rw_semaphore lli_glimpse_sem; ktime_t lli_glimpse_time; struct list_head lli_agl_list; __u64 lli_agl_index; /* for writepage() only to communicate to fsync */ int lli_async_rc; /* protect the file heat fields */ spinlock_t lli_heat_lock; __u32 lli_heat_flags; struct obd_heat_instance lli_heat_instances[OBD_HEAT_COUNT]; /* * Whenever a process try to read/write the file, the * jobid of the process will be saved here, and it'll * be packed into the write PRC when flush later. * * So the read/write statistics for jobid will not be * accurate if the file is shared by different jobs. */ char lli_jobid[LUSTRE_JOBID_SIZE]; struct mutex lli_pcc_lock; enum lu_pcc_state_flags lli_pcc_state; /* * @lli_pcc_generation saves the gobal PCC generation * when the file was successfully attached into PCC. * The flags of the PCC dataset are saved in * @lli_pcc_dsflags. * The gobal PCC generation will be increased when add * or delete a PCC backend, or change the configuration * parameters for PCC. * If @lli_pcc_generation is same as the gobal PCC * generation, we can use the saved flags of the PCC * dataset to determine whether need to try auto attach * safely. */ __u64 lli_pcc_generation; enum pcc_dataset_flags lli_pcc_dsflags; struct pcc_inode *lli_pcc_inode; struct mutex lli_group_mutex; __u64 lli_group_users; unsigned long lli_group_gid; __u64 lli_attr_valid; __u64 lli_lazysize; __u64 lli_lazyblocks; }; }; /* XXX: For following frequent used members, although they maybe special * used for non-directory object, it is some time-wasting to check * whether the object is directory or not before using them. On the * other hand, currently, sizeof(f) > sizeof(d), it cannot reduce * the "ll_inode_info" size even if moving those members into u.f. * So keep them out side. * * In the future, if more members are added only for directory, * some of the following members can be moved into u.f. */ struct cl_object *lli_clob; /* mutex to request for layout lock exclusively. */ struct mutex lli_layout_mutex; /* Layout version, protected by lli_layout_lock */ __u32 lli_layout_gen; spinlock_t lli_layout_lock; __u32 lli_projid; /* project id */ 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 void ll_trunc_sem_init(struct ll_trunc_sem *sem) { atomic_set(&sem->ll_trunc_readers, 0); atomic_set(&sem->ll_trunc_waiters, 0); } /* This version of down read ignores waiting writers, meaning if the semaphore * is already held for read, this down_read will 'join' that reader and also * take the semaphore. * * This lets us avoid an unusual deadlock. * * We must take lli_trunc_sem in read mode on entry in to various i/o paths * in Lustre, in order to exclude truncates. Some of these paths then need to * take the mmap_sem, while still holding the trunc_sem. The problem is that * page faults hold the mmap_sem when calling in to Lustre, and then must also * take the trunc_sem to exclude truncate. * * This means the locking order for trunc_sem and mmap_sem is sometimes AB, * sometimes BA. This is almost OK because in both cases, we take the trunc * sem for read, so it doesn't block. * * However, if a write mode user (truncate, a setattr op) arrives in the * middle of this, the second reader on the truncate_sem will wait behind that * writer. * * So we have, on our truncate sem, in order (where 'reader' and 'writer' refer * to the mode in which they take the semaphore): * reader (holding mmap_sem, needs truncate_sem) * writer * reader (holding truncate sem, waiting for mmap_sem) * * And so the readers deadlock. * * The solution is this modified semaphore, where this down_read ignores * waiting write operations, and all waiters are woken up at once, so readers * using down_read_nowait cannot get stuck behind waiting writers, regardless * of the order they arrived in. * * down_read_nowait is only used in the page fault case, where we already hold * the mmap_sem. This is because otherwise repeated read and write operations * (which take the truncate sem) could prevent a truncate from ever starting. * This could still happen with page faults, but without an even more complex * mechanism, this is unavoidable. * * LU-12460 */ static inline void trunc_sem_down_read_nowait(struct ll_trunc_sem *sem) { wait_var_event(&sem->ll_trunc_readers, atomic_inc_unless_negative(&sem->ll_trunc_readers)); } static inline void trunc_sem_down_read(struct ll_trunc_sem *sem) { wait_var_event(&sem->ll_trunc_readers, atomic_read(&sem->ll_trunc_waiters) == 0 && atomic_inc_unless_negative(&sem->ll_trunc_readers)); } static inline void trunc_sem_up_read(struct ll_trunc_sem *sem) { if (atomic_dec_return(&sem->ll_trunc_readers) == 0 && atomic_read(&sem->ll_trunc_waiters)) wake_up_var(&sem->ll_trunc_readers); } static inline void trunc_sem_down_write(struct ll_trunc_sem *sem) { atomic_inc(&sem->ll_trunc_waiters); wait_var_event(&sem->ll_trunc_readers, atomic_cmpxchg(&sem->ll_trunc_readers, 0, -1) == 0); atomic_dec(&sem->ll_trunc_waiters); } static inline void trunc_sem_up_write(struct ll_trunc_sem *sem) { atomic_set(&sem->ll_trunc_readers, 0); wake_up_var(&sem->ll_trunc_readers); } #ifdef CONFIG_LUSTRE_FS_POSIX_ACL static inline void lli_clear_acl(struct ll_inode_info *lli) { if (lli->lli_posix_acl) { posix_acl_release(lli->lli_posix_acl); lli->lli_posix_acl = NULL; } } static inline void lli_replace_acl(struct ll_inode_info *lli, struct lustre_md *md) { spin_lock(&lli->lli_lock); if (lli->lli_posix_acl) posix_acl_release(lli->lli_posix_acl); lli->lli_posix_acl = md->posix_acl; spin_unlock(&lli->lli_lock); } #else static inline void lli_clear_acl(struct ll_inode_info *lli) { } static inline void lli_replace_acl(struct ll_inode_info *lli, struct lustre_md *md) { } #endif 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); } enum ll_file_flags { /* File data is modified. */ LLIF_DATA_MODIFIED = 0, /* File is being restored */ LLIF_FILE_RESTORING = 1, /* Xattr cache is attached to the file */ LLIF_XATTR_CACHE = 2, /* Project inherit */ LLIF_PROJECT_INHERIT = 3, /* update atime from MDS even if it's older than local inode atime. */ LLIF_UPDATE_ATIME = 4, }; static inline void ll_file_set_flag(struct ll_inode_info *lli, enum ll_file_flags flag) { set_bit(flag, &lli->lli_flags); } static inline void ll_file_clear_flag(struct ll_inode_info *lli, enum ll_file_flags flag) { clear_bit(flag, &lli->lli_flags); } static inline bool ll_file_test_flag(struct ll_inode_info *lli, enum ll_file_flags flag) { return test_bit(flag, &lli->lli_flags); } static inline bool ll_file_test_and_clear_flag(struct ll_inode_info *lli, enum ll_file_flags flag) { return test_and_clear_bit(flag, &lli->lli_flags); } int ll_xattr_cache_destroy(struct inode *inode); int ll_xattr_cache_get(struct inode *inode, const char *name, char *buffer, size_t size, __u64 valid); int ll_xattr_cache_insert(struct inode *inode, const char *name, char *buffer, size_t size); static inline bool obd_connect_has_secctx(struct obd_connect_data *data) { #ifdef CONFIG_SECURITY return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 && data->ocd_connect_flags2 & OBD_CONNECT2_FILE_SECCTX; #else return false; #endif } static inline void obd_connect_set_secctx(struct obd_connect_data *data) { #ifdef CONFIG_SECURITY data->ocd_connect_flags2 |= OBD_CONNECT2_FILE_SECCTX; #endif } int ll_dentry_init_security(struct dentry *dentry, int mode, struct qstr *name, const char **secctx_name, void **secctx, __u32 *secctx_size); int ll_inode_init_security(struct dentry *dentry, struct inode *inode, struct inode *dir); int ll_listsecurity(struct inode *inode, char *secctx_name, size_t secctx_name_size); static inline bool obd_connect_has_enc(struct obd_connect_data *data) { #ifdef HAVE_LUSTRE_CRYPTO return data->ocd_connect_flags & OBD_CONNECT_FLAGS2 && data->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT; #else return false; #endif } static inline void obd_connect_set_enc(struct obd_connect_data *data) { #ifdef HAVE_LUSTRE_CRYPTO data->ocd_connect_flags2 |= OBD_CONNECT2_ENCRYPT; #endif } /* * 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); static inline struct ll_inode_info *ll_i2info(struct inode *inode) { return container_of(inode, struct ll_inode_info, lli_vfs_inode); } static inline struct pcc_inode *ll_i2pcci(struct inode *inode) { return ll_i2info(inode)->lli_pcc_inode; } /* default to use at least 16M for fast read if possible */ #define RA_REMAIN_WINDOW_MIN MiB_TO_PAGES(16UL) /* default read-ahead on a given client mountpoint. */ #define SBI_DEFAULT_READ_AHEAD_MAX MiB_TO_PAGES(1024UL) /* default read-ahead for a single file descriptor */ #define SBI_DEFAULT_READ_AHEAD_PER_FILE_MAX MiB_TO_PAGES(256UL) /* default read-ahead full files smaller than limit on the second read */ #define SBI_DEFAULT_READ_AHEAD_WHOLE_MAX MiB_TO_PAGES(2UL) 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, RA_STAT_ASYNC, RA_STAT_FAILED_FAST_READ, _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; struct workqueue_struct *ll_readahead_wq; /* * Max number of active works could be triggered * for async readahead. */ unsigned int ra_async_max_active; /* how many async readahead triggered in flight */ atomic_t ra_async_inflight; /* Threshold to control when to trigger async readahead */ unsigned long ra_async_pages_per_file_threshold; }; /* 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 { pgoff_t ria_start_idx; /* start offset of read-ahead*/ pgoff_t ria_end_idx; /* end offset of read-ahead*/ unsigned long ria_reserved; /* reserved pages for read-ahead */ pgoff_t ria_end_idx_min;/* minimum end to cover current read */ bool ria_eof; /* reach end of file */ /* If stride read pattern is detected, ria_stoff is the byte offset * where stride read is started. Note: for normal read-ahead, the * value here is meaningless, and also it will not be accessed*/ loff_t ria_stoff; /* ria_length and ria_bytes 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*/ loff_t ria_length; loff_t ria_bytes; }; /* LL_HIST_MAX=32 causes an overflow */ #define LL_HIST_MAX 28 #define LL_HIST_START 12 /* buckets start at 2^12 = 4k */ #define LL_PROCESS_HIST_MAX 10 struct per_process_info { pid_t pid; struct obd_histogram pp_r_hist; struct obd_histogram pp_w_hist; }; /* pp_extents[LL_PROCESS_HIST_MAX] will hold the combined process info */ struct ll_rw_extents_info { struct per_process_info pp_extents[LL_PROCESS_HIST_MAX + 1]; }; #define LL_OFFSET_HIST_MAX 100 struct ll_rw_process_info { pid_t rw_pid; int rw_op; loff_t rw_range_start; loff_t rw_range_end; loff_t rw_last_file_pos; loff_t rw_offset; size_t rw_smallest_extent; size_t rw_largest_extent; struct ll_file_data *rw_last_file; }; enum stats_track_type { STATS_TRACK_ALL = 0, /* track all processes */ STATS_TRACK_PID, /* track process with this pid */ STATS_TRACK_PPID, /* track processes with this ppid */ STATS_TRACK_GID, /* track processes with this gid */ STATS_TRACK_LAST, }; /* flags for sbi->ll_flags */ #define LL_SBI_NOLCK 0x01 /* DLM locking disabled (directio-only) */ #define LL_SBI_CHECKSUM 0x02 /* checksum each page as it's written */ #define LL_SBI_FLOCK 0x04 #define LL_SBI_USER_XATTR 0x08 /* support user xattr */ #define LL_SBI_ACL 0x10 /* support ACL */ /* LL_SBI_RMT_CLIENT 0x40 remote client */ #define LL_SBI_MDS_CAPA 0x80 /* support mds capa, obsolete */ #define LL_SBI_OSS_CAPA 0x100 /* support oss capa, obsolete */ #define LL_SBI_LOCALFLOCK 0x200 /* Local flocks support by kernel */ #define LL_SBI_LRU_RESIZE 0x400 /* lru resize support */ #define LL_SBI_LAZYSTATFS 0x800 /* lazystatfs mount option */ /* LL_SBI_SOM_PREVIEW 0x1000 SOM preview mount option, obsolete */ #define LL_SBI_32BIT_API 0x2000 /* generate 32 bit inodes. */ #define LL_SBI_64BIT_HASH 0x4000 /* support 64-bits dir hash/offset */ #define LL_SBI_AGL_ENABLED 0x8000 /* enable agl */ #define LL_SBI_VERBOSE 0x10000 /* verbose mount/umount */ #define LL_SBI_LAYOUT_LOCK 0x20000 /* layout lock support */ #define LL_SBI_USER_FID2PATH 0x40000 /* allow fid2path by unprivileged users */ #define LL_SBI_XATTR_CACHE 0x80000 /* support for xattr cache */ #define LL_SBI_NOROOTSQUASH 0x100000 /* do not apply root squash */ #define LL_SBI_ALWAYS_PING 0x200000 /* always ping even if server * suppress_pings */ #define LL_SBI_FAST_READ 0x400000 /* fast read support */ #define LL_SBI_FILE_SECCTX 0x800000 /* set file security context at create */ /* LL_SBI_PIO 0x1000000 parallel IO support, introduced in 2.10, abandoned */ #define LL_SBI_TINY_WRITE 0x2000000 /* tiny write support */ #define LL_SBI_FILE_HEAT 0x4000000 /* file heat support */ #define LL_SBI_TEST_DUMMY_ENCRYPTION 0x8000000 /* test dummy encryption */ #define LL_SBI_ENCRYPT 0x10000000 /* client side encryption */ #define LL_SBI_FLAGS { \ "nolck", \ "checksum", \ "flock", \ "user_xattr", \ "acl", \ "???", \ "???", \ "mds_capa", \ "oss_capa", \ "flock", \ "lru_resize", \ "lazy_statfs", \ "som", \ "32bit_api", \ "64bit_hash", \ "agl", \ "verbose", \ "layout", \ "user_fid2path",\ "xattr_cache", \ "norootsquash", \ "always_ping", \ "fast_read", \ "file_secctx", \ "pio", \ "tiny_write", \ "file_heat", \ "test_dummy_encryption", \ "noencrypt", \ } /* This is embedded into llite super-blocks to keep track of connect * flags (capabilities) supported by all imports given mount is * connected to. */ struct lustre_client_ocd { /* This is conjunction of connect_flags across all imports * (LOVs) this mount is connected to. This field is updated by * cl_ocd_update() under ->lco_lock. */ __u64 lco_flags; struct mutex lco_lock; struct obd_export *lco_md_exp; struct obd_export *lco_dt_exp; }; struct ll_sb_info { /* this protects pglist and ra_info. It isn't safe to * grab from interrupt contexts */ spinlock_t ll_lock; spinlock_t ll_pp_extent_lock; /* pp_extent entry*/ spinlock_t ll_process_lock; /* ll_rw_process_info */ struct obd_uuid ll_sb_uuid; struct obd_export *ll_md_exp; struct obd_export *ll_dt_exp; struct obd_device *ll_md_obd; struct obd_device *ll_dt_obd; struct dentry *ll_debugfs_entry; struct lu_fid ll_root_fid; /* root object fid */ int ll_flags; unsigned int ll_xattr_cache_enabled:1, ll_xattr_cache_set:1, /* already set to 0/1 */ ll_client_common_fill_super_succeeded:1, ll_checksum_set:1; struct lustre_client_ocd ll_lco; struct lprocfs_stats *ll_stats; /* lprocfs stats counter */ /* Used to track "unstable" pages on a client, and maintain a * LRU list of clean pages. An "unstable" page is defined as * any page which is sent to a server as part of a bulk request, * but is uncommitted to stable storage. */ struct cl_client_cache *ll_cache; struct lprocfs_stats *ll_ra_stats; struct ll_ra_info ll_ra_info; unsigned int ll_namelen; struct file_operations *ll_fop; 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_running_max;/* max concurrent * statahead instances */ unsigned int ll_sa_max; /* max statahead RPCs */ atomic_t ll_sa_total; /* statahead thread started * count */ atomic_t ll_sa_wrong; /* statahead thread stopped for * low hit ratio */ atomic_t ll_sa_running; /* running statahead thread * count */ atomic_t ll_agl_total; /* AGL thread started count */ dev_t ll_sdev_orig; /* save s_dev before assign for * clustred nfs */ /* root squash */ struct root_squash_info ll_squash; struct path ll_mnt; /* st_blksize returned by stat(2), when non-zero */ unsigned int ll_stat_blksize; /* maximum relative age of cached statfs results */ unsigned int ll_statfs_max_age; struct kset ll_kset; /* sysfs object */ struct completion ll_kobj_unregister; /* File heat */ unsigned int ll_heat_decay_weight; unsigned int ll_heat_period_second; /* filesystem fsname */ char ll_fsname[LUSTRE_MAXFSNAME + 1]; /* Persistent Client Cache */ struct pcc_super ll_pcc_super; }; #define SBI_DEFAULT_HEAT_DECAY_WEIGHT ((80 * 256 + 50) / 100) #define SBI_DEFAULT_HEAT_PERIOD_SECOND (60) /* * per file-descriptor read-ahead data. */ struct ll_readahead_state { spinlock_t ras_lock; /* End byte that read(2) try to read. */ loff_t ras_last_read_end_bytes; /* * number of bytes 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. */ loff_t ras_consecutive_bytes; /* * 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. */ pgoff_t ras_window_start_idx; pgoff_t ras_window_pages; /* * Optimal RPC size in pages. * It decides how many pages will be sent for each read-ahead. */ unsigned long ras_rpc_pages; /* * 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. */ pgoff_t ras_next_readahead_idx; /* * 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; /* * The following 3 items are used for detecting the stride I/O * mode. * In stride I/O mode, * ...............|-----data-----|****gap*****|--------|******|.... * offset |-stride_bytes-|-stride_gap-| * ras_stride_offset = offset; * ras_stride_length = stride_bytes + stride_gap; * ras_stride_bytes = stride_bytes; * Note: all these three items are counted by bytes. */ loff_t ras_stride_offset; loff_t ras_stride_length; loff_t ras_stride_bytes; /* * 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; /* index of the last page that async readahead starts */ pgoff_t ras_async_last_readpage_idx; /* whether we should increase readahead window */ bool ras_need_increase_window; /* whether ra miss check should be skipped */ bool ras_no_miss_check; }; struct ll_readahead_work { /** File to readahead */ struct file *lrw_file; pgoff_t lrw_start_idx; pgoff_t lrw_end_idx; /* async worker to handler read */ struct work_struct lrw_readahead_work; char lrw_jobid[LUSTRE_JOBID_SIZE]; }; 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; bool ll_lock_no_expand; rwlock_t fd_lock; /* protect lcc list */ struct list_head fd_lccs; /* list of ll_cl_context */ /* Used by mirrored file to lead IOs to a specific mirror, usually * for mirror resync. 0 means default. */ __u32 fd_designated_mirror; /* The layout version when resync starts. Resync I/O should carry this * layout version for verification to OST objects */ __u32 fd_layout_version; struct pcc_file fd_pcc_file; }; void llite_tunables_unregister(void); int llite_tunables_register(void); 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) if (unlikely(sbi->ll_flags & LL_SBI_32BIT_API)) return true; # ifdef CONFIG_X86_X32 /* in_compat_syscall() returns true when called from a kthread * and CONFIG_X86_X32 is enabled, which is wrong. So check * whether the caller comes from a syscall (ie. not a kthread) * before calling in_compat_syscall(). */ if (current->flags & PF_KTHREAD) return false; # endif return unlikely(in_compat_syscall()); #else return unlikely(sbi->ll_flags & LL_SBI_32BIT_API); #endif } static inline bool ll_sbi_has_fast_read(struct ll_sb_info *sbi) { return !!(sbi->ll_flags & LL_SBI_FAST_READ); } static inline bool ll_sbi_has_tiny_write(struct ll_sb_info *sbi) { return !!(sbi->ll_flags & LL_SBI_TINY_WRITE); } static inline bool ll_sbi_has_file_heat(struct ll_sb_info *sbi) { return !!(sbi->ll_flags & LL_SBI_FILE_HEAT); } void ll_ras_enter(struct file *f, loff_t pos, size_t count); /* llite/lcommon_misc.c */ int cl_ocd_update(struct obd_device *host, struct obd_device *watched, enum obd_notify_event ev, void *owner); int cl_get_grouplock(struct cl_object *obj, unsigned long gid, int nonblock, struct ll_grouplock *lg); void cl_put_grouplock(struct ll_grouplock *lg); /* llite/lproc_llite.c */ int ll_debugfs_register_super(struct super_block *sb, const char *name); void ll_debugfs_unregister_super(struct super_block *sb); void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, long count); enum { LPROC_LL_READ_BYTES, LPROC_LL_WRITE_BYTES, LPROC_LL_READ, LPROC_LL_WRITE, LPROC_LL_IOCTL, LPROC_LL_OPEN, LPROC_LL_RELEASE, LPROC_LL_MMAP, LPROC_LL_FAULT, LPROC_LL_MKWRITE, LPROC_LL_LLSEEK, LPROC_LL_FSYNC, LPROC_LL_READDIR, LPROC_LL_SETATTR, LPROC_LL_TRUNC, LPROC_LL_FLOCK, LPROC_LL_GETATTR, LPROC_LL_CREATE, LPROC_LL_LINK, LPROC_LL_UNLINK, LPROC_LL_SYMLINK, LPROC_LL_MKDIR, LPROC_LL_RMDIR, LPROC_LL_MKNOD, LPROC_LL_RENAME, LPROC_LL_STATFS, LPROC_LL_SETXATTR, LPROC_LL_GETXATTR, LPROC_LL_GETXATTR_HITS, LPROC_LL_LISTXATTR, LPROC_LL_REMOVEXATTR, LPROC_LL_INODE_PERM, LPROC_LL_FALLOCATE, LPROC_LL_FILE_OPCODES }; /* llite/dir.c */ enum get_default_layout_type { GET_DEFAULT_LAYOUT_ROOT = 1, }; struct ll_dir_chain { }; static inline void ll_dir_chain_init(struct ll_dir_chain *chain) { } static inline void ll_dir_chain_fini(struct ll_dir_chain *chain) { } extern const struct file_operations ll_dir_operations; extern const struct inode_operations ll_dir_inode_operations; #ifdef HAVE_DIR_CONTEXT int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data, struct dir_context *ctx); #else int ll_dir_read(struct inode *inode, __u64 *pos, struct md_op_data *op_data, void *cookie, filldir_t filldir); #endif int ll_get_mdt_idx(struct inode *inode); int ll_get_mdt_idx_by_fid(struct ll_sb_info *sbi, const struct lu_fid *fid); struct page *ll_get_dir_page(struct inode *dir, struct md_op_data *op_data, __u64 offset, struct ll_dir_chain *chain); void ll_release_page(struct inode *inode, struct page *page, bool remove); /* llite/namei.c */ extern const struct inode_operations ll_special_inode_operations; struct inode *ll_iget(struct super_block *sb, ino_t hash, struct lustre_md *lic); int ll_test_inode_by_fid(struct inode *inode, void *opaque); int ll_md_blocking_ast(struct ldlm_lock *, 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); void ll_update_times(struct ptlrpc_request *request, struct inode *inode); /* llite/rw.c */ int ll_writepage(struct page *page, struct writeback_control *wbc); int ll_writepages(struct address_space *, struct writeback_control *wbc); int ll_readpage(struct file *file, struct page *page); int ll_io_read_page(const struct lu_env *env, struct cl_io *io, struct cl_page *page, struct file *file); void ll_readahead_init(struct inode *inode, struct ll_readahead_state *ras); int vvp_io_write_commit(const struct lu_env *env, struct cl_io *io); enum lcc_type; void ll_cl_add(struct file *file, const struct lu_env *env, struct cl_io *io, enum lcc_type type); void ll_cl_remove(struct file *file, const struct lu_env *env); struct ll_cl_context *ll_cl_find(struct file *file); 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 struct inode_operations ll_file_inode_operations; extern int ll_have_md_lock(struct inode *inode, __u64 *bits, enum ldlm_mode l_req_mode); extern enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits, struct lustre_handle *lockh, __u64 flags, enum ldlm_mode mode); int ll_file_open(struct inode *inode, struct file *file); int ll_file_release(struct inode *inode, struct file *file); int ll_release_openhandle(struct dentry *, struct lookup_intent *); int ll_md_real_close(struct inode *inode, fmode_t fmode); extern void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, struct ll_file_data *file, loff_t pos, size_t count, int rw); #ifdef HAVE_INODEOPS_ENHANCED_GETATTR int ll_getattr(const struct path *path, struct kstat *stat, u32 request_mask, unsigned int flags); #else int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat); #endif int ll_getattr_dentry(struct dentry *de, struct kstat *stat, u32 request_mask, unsigned int flags); struct posix_acl *ll_get_acl(struct inode *inode, int type); #ifdef HAVE_IOP_SET_ACL #ifdef CONFIG_LUSTRE_FS_POSIX_ACL int ll_set_acl(struct inode *inode, struct posix_acl *acl, int type); #else /* !CONFIG_LUSTRE_FS_POSIX_ACL */ #define ll_set_acl NULL #endif /* CONFIG_LUSTRE_FS_POSIX_ACL */ #endif static inline int ll_xflags_to_inode_flags(int xflags) { return ((xflags & FS_XFLAG_SYNC) ? S_SYNC : 0) | ((xflags & FS_XFLAG_NOATIME) ? S_NOATIME : 0) | ((xflags & FS_XFLAG_APPEND) ? S_APPEND : 0) | ((xflags & FS_XFLAG_IMMUTABLE) ? S_IMMUTABLE : 0); } static inline int ll_inode_flags_to_xflags(int flags) { return ((flags & S_SYNC) ? FS_XFLAG_SYNC : 0) | ((flags & S_NOATIME) ? FS_XFLAG_NOATIME : 0) | ((flags & S_APPEND) ? FS_XFLAG_APPEND : 0) | ((flags & S_IMMUTABLE) ? FS_XFLAG_IMMUTABLE : 0); } int ll_migrate(struct inode *parent, struct file *file, struct lmv_user_md *lum, const char *name); int ll_get_fid_by_name(struct inode *parent, const char *name, int namelen, struct lu_fid *fid, struct inode **inode); int ll_inode_permission(struct inode *inode, int mask); int ll_ioctl_check_project(struct inode *inode, struct fsxattr *fa); int ll_ioctl_fsgetxattr(struct inode *inode, unsigned int cmd, unsigned long arg); int ll_ioctl_fssetxattr(struct inode *inode, unsigned int cmd, unsigned long arg); 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_default(struct inode *inode, void **lmmp, int *lmm_size, struct ptlrpc_request **request, struct ptlrpc_request **root_request, u64 valid); int ll_dir_getstripe(struct inode *inode, void **plmm, int *plmm_size, struct ptlrpc_request **request, u64 valid); int ll_fsync(struct file *file, loff_t start, loff_t end, int data); int ll_merge_attr(const struct lu_env *env, struct inode *inode); int ll_fid2path(struct inode *inode, void __user *arg); int ll_data_version(struct inode *inode, __u64 *data_version, int flags); int ll_hsm_release(struct inode *inode); int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss); void ll_io_set_mirror(struct cl_io *io, const struct file *file); /* 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_prune_aliases(struct inode *inode); void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry); int ll_revalidate_it_finish(struct ptlrpc_request *request, struct lookup_intent *it, struct dentry *de); /* llite/llite_lib.c */ extern struct super_operations lustre_super_operations; void ll_lli_init(struct ll_inode_info *lli); int ll_fill_super(struct super_block *sb); void ll_put_super(struct super_block *sb); void ll_kill_super(struct super_block *sb); struct inode *ll_inode_from_resource_lock(struct ldlm_lock *lock); void ll_dir_clear_lsm_md(struct inode *inode); void ll_clear_inode(struct inode *inode); int ll_setattr_raw(struct dentry *dentry, struct iattr *attr, enum op_xvalid xvalid, 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 ll_sb_info *sbi, struct obd_statfs *osfs, u32 flags); int ll_update_inode(struct inode *inode, struct lustre_md *md); void ll_update_inode_flags(struct inode *inode, int ext_flags); int ll_read_inode2(struct inode *inode, void *opaque); void ll_delete_inode(struct inode *inode); int ll_iocontrol(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); int ll_flush_ctx(struct inode *inode); void ll_umount_begin(struct super_block *sb); int ll_remount_fs(struct super_block *sb, int *flags, char *data); int ll_show_options(struct seq_file *seq, struct dentry *dentry); void ll_dirty_page_discard_warn(struct page *page, int ioret); int ll_prep_inode(struct inode **inode, struct ptlrpc_request *req, struct super_block *, 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_set_default_mdsize(struct ll_sb_info *sbi, int default_mdsize); void ll_unlock_md_op_lsm(struct md_op_data *op_data); struct md_op_data *ll_prep_md_op_data(struct md_op_data *op_data, struct inode *i1, struct inode *i2, const char *name, size_t namelen, __u32 mode, enum md_op_code 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); void ll_compute_rootsquash_state(struct ll_sb_info *sbi); ssize_t ll_copy_user_md(const struct lov_user_md __user *md, struct lov_user_md **kbuf); void ll_open_cleanup(struct super_block *sb, struct ptlrpc_request *open_req); void ll_dom_finish_open(struct inode *inode, struct ptlrpc_request *req); /* Compute expected user md size when passing in a md from user space */ static inline ssize_t ll_lov_user_md_size(const struct lov_user_md *lum) { switch (lum->lmm_magic) { case LOV_USER_MAGIC_V1: return sizeof(struct lov_user_md_v1); case LOV_USER_MAGIC_V3: return sizeof(struct lov_user_md_v3); case LOV_USER_MAGIC_SPECIFIC: if (lum->lmm_stripe_count > LOV_MAX_STRIPE_COUNT) return -EINVAL; return lov_user_md_size(lum->lmm_stripe_count, LOV_USER_MAGIC_SPECIFIC); case LOV_USER_MAGIC_COMP_V1: return ((struct lov_comp_md_v1 *)lum)->lcm_size; case LOV_USER_MAGIC_FOREIGN: return foreign_size(lum); } return -EINVAL; } /* llite/llite_nfs.c */ extern struct export_operations lustre_export_operations; __u32 get_uuid2int(const char *name, int len); struct inode *search_inode_for_lustre(struct super_block *sb, const struct lu_fid *fid); int ll_dir_get_parent_fid(struct inode *dir, struct lu_fid *parent_fid); /* llite/symlink.c */ extern struct inode_operations ll_fast_symlink_inode_operations; /** * IO arguments for various VFS I/O interfaces. */ struct vvp_io_args { /** normal/sendfile/splice */ union { struct { struct kiocb *via_iocb; struct iov_iter *via_iter; } normal; } u; }; enum lcc_type { LCC_RW = 1, LCC_MMAP }; 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; enum lcc_type lcc_type; }; 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 != NULL); return lti; } static inline struct vvp_io_args *ll_env_args(const struct lu_env *env) { return &ll_env_info(env)->lti_args; } void ll_io_init(struct cl_io *io, struct file *file, enum cl_io_type iot, struct vvp_io_args *args); /* llite/llite_mmap.c */ int ll_teardown_mmaps(struct address_space *mapping, __u64 first, __u64 last); int ll_file_mmap(struct file * file, struct vm_area_struct * vma); void policy_from_vma(union ldlm_policy_data *policy, struct vm_area_struct *vma, unsigned long addr, size_t count); struct vm_area_struct *our_vma(struct mm_struct *mm, unsigned long addr, size_t count); #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 bool ll_dir_striped(struct inode *inode) { LASSERT(inode); return S_ISDIR(inode->i_mode) && lmv_dir_striped(ll_i2info(inode)->lli_lsm_md); } static inline loff_t ll_file_maxbytes(struct inode *inode) { struct cl_object *obj = ll_i2info(inode)->lli_clob; if (obj == NULL) return MAX_LFS_FILESIZE; return min_t(loff_t, cl_object_maxbytes(obj), MAX_LFS_FILESIZE); } /* llite/xattr.c */ extern const struct xattr_handler *ll_xattr_handlers[]; #define XATTR_USER_T 1 #define XATTR_TRUSTED_T 2 #define XATTR_SECURITY_T 3 #define XATTR_ACL_ACCESS_T 4 #define XATTR_ACL_DEFAULT_T 5 #define XATTR_LUSTRE_T 6 #define XATTR_OTHER_T 7 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size); int ll_xattr_list(struct inode *inode, const char *name, int type, void *buffer, size_t size, u64 valid); const struct xattr_handler *get_xattr_type(const char *name); /** * Common IO arguments for various VFS I/O interfaces. */ int cl_sb_init(struct super_block *sb); int cl_sb_fini(struct super_block *sb); enum ras_update_flags { LL_RAS_HIT = 0x1, LL_RAS_MMAP = 0x2 }; void ll_ra_count_put(struct ll_sb_info *sbi, unsigned long len); void ll_ra_stats_inc(struct inode *inode, enum ra_stat which); /* statahead.c */ #define LL_SA_RPC_MIN 2 #define LL_SA_RPC_DEF 32 #define LL_SA_RPC_MAX 512 /* XXX: If want to support more concurrent statahead instances, * please consider to decentralize the RPC lists attached * on related import, such as imp_{sending,delayed}_list. * LU-11079 */ #define LL_SA_RUNNING_MAX 256 #define LL_SA_RUNNING_DEF 16 #define LL_SA_CACHE_BIT 5 #define LL_SA_CACHE_SIZE (1 << LL_SA_CACHE_BIT) #define LL_SA_CACHE_MASK (LL_SA_CACHE_SIZE - 1) /* per inode struct, for dir only */ struct ll_statahead_info { struct dentry *sai_dentry; atomic_t sai_refcount; /* when access this struct, hold * refcount */ unsigned int sai_max; /* max ahead of lookup */ __u64 sai_sent; /* stat requests sent count */ __u64 sai_replied; /* stat requests which received * reply */ __u64 sai_index; /* index of statahead entry */ __u64 sai_index_wait; /* index of entry which is the * caller is waiting for */ __u64 sai_hit; /* hit count */ __u64 sai_miss; /* miss count: * for "ls -al" case, 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_in_readpage:1;/* statahead is in readdir()*/ wait_queue_head_t sai_waitq; /* stat-ahead wait queue */ struct task_struct *sai_task; /* stat-ahead thread */ struct task_struct *sai_agl_task; /* AGL thread */ struct list_head sai_interim_entries; /* entries which got async * stat reply, but not * instantiated */ struct list_head sai_entries; /* completed entries */ struct list_head sai_agls; /* AGLs to be sent */ struct list_head sai_cache[LL_SA_CACHE_SIZE]; spinlock_t sai_cache_lock[LL_SA_CACHE_SIZE]; atomic_t sai_cache_count; /* entry count in cache */ }; int ll_revalidate_statahead(struct inode *dir, struct dentry **dentry, bool unplug); int ll_start_statahead(struct inode *dir, struct dentry *dentry, bool agl); void ll_authorize_statahead(struct inode *dir, void *key); void ll_deauthorize_statahead(struct inode *dir, void *key); /* glimpse.c */ 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); } /* AGL is 'asychronous glimpse lock', which is a speculative lock taken as * part of statahead */ static inline int cl_agl(struct inode *inode) { return cl_glimpse_size0(inode, 1); } int ll_file_lock_ahead(struct file *file, struct llapi_lu_ladvise *ladvise); int cl_io_get(struct inode *inode, struct lu_env **envout, struct cl_io **ioout, __u16 *refcheck); 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 = ktime_get(); up_read(&lli->lli_glimpse_sem); return rc; } /* dentry may statahead when statahead is enabled and current process has opened * parent directory, and this dentry hasn't accessed statahead cache before */ static inline bool dentry_may_statahead(struct inode *dir, struct dentry *dentry) { struct ll_inode_info *lli; struct ll_dentry_data *ldd; if (ll_i2sbi(dir)->ll_sa_max == 0) return false; lli = ll_i2info(dir); /* statahead is not allowed for this dir, there may be three causes: * 1. dir is not opened. * 2. statahead hit ratio is too low. * 3. previous stat started statahead thread failed. */ if (!lli->lli_sa_enabled) return false; /* not the same process, don't statahead */ if (lli->lli_opendir_pid != current->pid) return false; /* * When stating a dentry, kernel may trigger 'revalidate' or 'lookup' * multiple times, eg. for 'getattr', 'getxattr' and etc. * For patchless client, lookup intent is not accurate, which may * misguide statahead. For example: * The 'revalidate' call for 'getattr' and 'getxattr' of a dentry will * have the same intent -- IT_GETATTR, while one dentry should access * statahead cache once, otherwise statahead windows is messed up. * The solution is as following: * Assign 'lld_sa_generation' with 'lli_sa_generation' when a dentry * IT_GETATTR for the first time, and subsequent IT_GETATTR will * bypass interacting with statahead cache by checking * 'lld_sa_generation == lli->lli_sa_generation'. */ ldd = ll_d2d(dentry); if (ldd != NULL && lli->lli_sa_generation && ldd->lld_sa_generation == lli->lli_sa_generation) return false; return true; } int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end, enum cl_fsync_mode mode, int ignore_layout); static inline int ll_file_nolock(const struct file *file) { struct ll_file_data *fd = file->private_data; struct inode *inode = file_inode((struct file *)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->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 attched to both * LOOKUP and PERM locks, so revoking either locks will * case the dcache being cleared */ if (it->it_remote_lock_mode) { handle.cookie = it->it_remote_lock_handle; CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID "(%p) for remote lock %#llx\n", PFID(ll_inode2fid(inode)), inode, handle.cookie); md_set_lock_data(exp, &handle, inode, NULL); } handle.cookie = it->it_lock_handle; CDEBUG(D_DLMTRACE, "setting l_data to inode "DFID"(%p)" " for lock %#llx\n", PFID(ll_inode2fid(inode)), inode, handle.cookie); md_set_lock_data(exp, &handle, inode, &it->it_lock_bits); it->it_lock_set = 1; } if (bits != NULL) *bits = it->it_lock_bits; } 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), it will be pruned by ll_prune_aliases() and * ll_prune_negative_children(); otherwise dput() of the last refcount will * unhash this dentry and kill it. */ static inline void d_lustre_invalidate(struct dentry *dentry) { CDEBUG(D_DENTRY, "invalidate dentry %pd (%p) parent %p inode %p refc %d\n", dentry, dentry, dentry->d_parent, dentry->d_inode, ll_d_count(dentry)); spin_lock(&dentry->d_lock); __d_lustre_invalidate(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); } static inline dev_t ll_compat_encode_dev(dev_t dev) { /* The compat_sys_*stat*() syscalls will fail unless the * device majors and minors are both less than 256. Note that * the value returned here will be passed through * old_encode_dev() in cp_compat_stat(). And so we are not * trying to return a valid compat (u16) device number, just * one that will pass the old_valid_dev() check. */ return MKDEV(MAJOR(dev) & 0xff, MINOR(dev) & 0xff); } 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_layout_write_intent(struct inode *inode, enum layout_intent_opc opc, struct lu_extent *ext); int ll_xattr_init(void); void ll_xattr_fini(void); int ll_page_sync_io(const struct lu_env *env, struct cl_io *io, struct cl_page *page, enum cl_req_type crt); int ll_getparent(struct file *file, struct getparent __user *arg); /* lcommon_cl.c */ int cl_setattr_ost(struct cl_object *obj, const struct iattr *attr, enum op_xvalid xvalid, unsigned int attr_flags); extern struct lu_env *cl_inode_fini_env; extern __u16 cl_inode_fini_refcheck; int cl_file_inode_init(struct inode *inode, struct lustre_md *md); void cl_inode_fini(struct inode *inode); u64 cl_fid_build_ino(const struct lu_fid *fid, int api32); u32 cl_fid_build_gen(const struct lu_fid *fid); static inline struct pcc_super *ll_i2pccs(struct inode *inode) { return &ll_i2sbi(inode)->ll_pcc_super; } static inline struct pcc_super *ll_info2pccs(struct ll_inode_info *lli) { return ll_i2pccs(ll_info2i(lli)); } #ifdef HAVE_LUSTRE_CRYPTO /* crypto.c */ extern const struct llcrypt_operations lustre_cryptops; #endif #endif /* LLITE_INTERNAL_H */