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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * Copyright (C) 2019 Samsung Electronics Co., Ltd.4 */5 6#ifndef __VFS_CACHE_H__7#define __VFS_CACHE_H__8 9#include <linux/file.h>10#include <linux/fs.h>11#include <linux/rwsem.h>12#include <linux/spinlock.h>13#include <linux/idr.h>14#include <linux/workqueue.h>15 16#include "vfs.h"17#include "mgmt/share_config.h"18 19/* Windows style file permissions for extended response */20#define FILE_GENERIC_ALL 0x1F01FF21#define FILE_GENERIC_READ 0x12008922#define FILE_GENERIC_WRITE 0x12011623#define FILE_GENERIC_EXECUTE 0X1200a024 25#define KSMBD_START_FID 026#define KSMBD_NO_FID (INT_MAX)27#define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL)28 29struct ksmbd_conn;30struct ksmbd_session;31 32struct ksmbd_lock {33 struct file_lock *fl;34 struct list_head clist;35 struct list_head flist;36 struct list_head llist;37 unsigned int flags;38 int cmd;39 int zero_len;40 unsigned long long start;41 unsigned long long end;42};43 44struct stream {45 char *name;46 ssize_t size;47};48 49struct ksmbd_inode {50 struct rw_semaphore m_lock;51 atomic_t m_count;52 atomic_t op_count;53 /* opinfo count for streams */54 atomic_t sop_count;55 struct dentry *m_de;56 unsigned int m_flags;57 struct hlist_node m_hash;58 struct list_head m_fp_list;59 struct list_head m_op_list;60 struct oplock_info *m_opinfo;61 __le32 m_fattr;62};63 64enum {65 FP_NEW = 0,66 FP_INITED,67 FP_CLOSED68};69 70struct ksmbd_file {71 struct file *filp;72 u64 persistent_id;73 u64 volatile_id;74 75 spinlock_t f_lock;76 77 struct ksmbd_inode *f_ci;78 struct ksmbd_inode *f_parent_ci;79 struct oplock_info __rcu *f_opinfo;80 struct ksmbd_conn *conn;81 struct ksmbd_tree_connect *tcon;82 83 atomic_t refcount;84 __le32 daccess;85 __le32 saccess;86 __le32 coption;87 __le32 cdoption;88 __u64 create_time;89 __u64 itime;90 91 bool is_nt_open;92 bool attrib_only;93 94 char client_guid[16];95 char create_guid[16];96 char app_instance_id[16];97 98 struct stream stream;99 struct list_head node;100 struct list_head blocked_works;101 struct list_head lock_list;102 103 unsigned int durable_timeout;104 unsigned int durable_scavenger_timeout;105 106 /* if ls is happening on directory, below is valid*/107 struct ksmbd_readdir_data readdir_data;108 int dot_dotdot[2];109 unsigned int f_state;110 bool reserve_lease_break;111 bool is_durable;112 bool is_persistent;113 bool is_resilient;114};115 116static inline void set_ctx_actor(struct dir_context *ctx,117 filldir_t actor)118{119 ctx->actor = actor;120}121 122#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG123 124struct ksmbd_file_table {125 rwlock_t lock;126 struct idr *idr;127};128 129static inline bool has_file_id(u64 id)130{131 return id < KSMBD_NO_FID;132}133 134static inline bool ksmbd_stream_fd(struct ksmbd_file *fp)135{136 return fp->stream.name != NULL;137}138 139int ksmbd_init_file_table(struct ksmbd_file_table *ft);140void ksmbd_destroy_file_table(struct ksmbd_file_table *ft);141int ksmbd_close_fd(struct ksmbd_work *work, u64 id);142struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id);143struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id);144struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id,145 u64 pid);146void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp);147struct ksmbd_inode *ksmbd_inode_lookup_lock(struct dentry *d);148void ksmbd_inode_put(struct ksmbd_inode *ci);149struct ksmbd_file *ksmbd_lookup_global_fd(unsigned long long id);150struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id);151void ksmbd_put_durable_fd(struct ksmbd_file *fp);152struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid);153struct ksmbd_file *ksmbd_lookup_fd_inode(struct dentry *dentry);154unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp);155struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp);156void ksmbd_launch_ksmbd_durable_scavenger(void);157void ksmbd_stop_durable_scavenger(void);158void ksmbd_close_tree_conn_fds(struct ksmbd_work *work);159void ksmbd_close_session_fds(struct ksmbd_work *work);160int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode);161int ksmbd_init_global_file_table(void);162void ksmbd_free_global_file_table(void);163void ksmbd_set_fd_limit(unsigned long limit);164void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp,165 unsigned int state);166 167/*168 * INODE hash169 */170int __init ksmbd_inode_hash_init(void);171void ksmbd_release_inode_hash(void);172 173enum KSMBD_INODE_STATUS {174 KSMBD_INODE_STATUS_OK,175 KSMBD_INODE_STATUS_UNKNOWN,176 KSMBD_INODE_STATUS_PENDING_DELETE,177};178 179int ksmbd_query_inode_status(struct dentry *dentry);180bool ksmbd_inode_pending_delete(struct ksmbd_file *fp);181void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp);182void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp);183void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp,184 int file_info);185int ksmbd_reopen_durable_fd(struct ksmbd_work *work, struct ksmbd_file *fp);186int ksmbd_validate_name_reconnect(struct ksmbd_share_config *share,187 struct ksmbd_file *fp, char *name);188int ksmbd_init_file_cache(void);189void ksmbd_exit_file_cache(void);190#endif /* __VFS_CACHE_H__ */191