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 18 /* Windows style file permissions for extended response */ 19 #define FILE_GENERIC_ALL 0x1F01FF 20 #define FILE_GENERIC_READ 0x120089 21 #define FILE_GENERIC_WRITE 0x120116 22 #define FILE_GENERIC_EXECUTE 0X1200a0 23 24 #define KSMBD_START_FID 0 25 #define KSMBD_NO_FID (INT_MAX) 26 #define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL) 27 28 struct ksmbd_conn; 29 struct ksmbd_session; 30 31 struct ksmbd_lock { 32 struct file_lock *fl; 33 struct list_head clist; 34 struct list_head flist; 35 struct list_head llist; 36 unsigned int flags; 37 int cmd; 38 int zero_len; 39 unsigned long long start; 40 unsigned long long end; 41 }; 42 43 struct stream { 44 char *name; 45 ssize_t size; 46 }; 47 48 struct ksmbd_inode { 49 rwlock_t m_lock; 50 atomic_t m_count; 51 atomic_t op_count; 52 /* opinfo count for streams */ 53 atomic_t sop_count; 54 struct inode *m_inode; 55 unsigned int m_flags; 56 struct hlist_node m_hash; 57 struct list_head m_fp_list; 58 struct list_head m_op_list; 59 struct oplock_info *m_opinfo; 60 __le32 m_fattr; 61 }; 62 63 enum { 64 FP_NEW = 0, 65 FP_INITED, 66 FP_CLOSED 67 }; 68 69 struct ksmbd_file { 70 struct file *filp; 71 u64 persistent_id; 72 u64 volatile_id; 73 74 spinlock_t f_lock; 75 76 struct ksmbd_inode *f_ci; 77 struct ksmbd_inode *f_parent_ci; 78 struct oplock_info __rcu *f_opinfo; 79 struct ksmbd_conn *conn; 80 struct ksmbd_tree_connect *tcon; 81 82 atomic_t refcount; 83 __le32 daccess; 84 __le32 saccess; 85 __le32 coption; 86 __le32 cdoption; 87 __u64 create_time; 88 __u64 itime; 89 90 bool is_nt_open; 91 bool attrib_only; 92 93 char client_guid[16]; 94 char create_guid[16]; 95 char app_instance_id[16]; 96 97 struct stream stream; 98 struct list_head node; 99 struct list_head blocked_works; 100 struct list_head lock_list; 101 102 int durable_timeout; 103 104 /* if ls is happening on directory, below is valid*/ 105 struct ksmbd_readdir_data readdir_data; 106 int dot_dotdot[2]; 107 unsigned int f_state; 108 }; 109 110 static inline void set_ctx_actor(struct dir_context *ctx, 111 filldir_t actor) 112 { 113 ctx->actor = actor; 114 } 115 116 #define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG 117 118 struct ksmbd_file_table { 119 rwlock_t lock; 120 struct idr *idr; 121 }; 122 123 static inline bool has_file_id(u64 id) 124 { 125 return id < KSMBD_NO_FID; 126 } 127 128 static inline bool ksmbd_stream_fd(struct ksmbd_file *fp) 129 { 130 return fp->stream.name != NULL; 131 } 132 133 int ksmbd_init_file_table(struct ksmbd_file_table *ft); 134 void ksmbd_destroy_file_table(struct ksmbd_file_table *ft); 135 int ksmbd_close_fd(struct ksmbd_work *work, u64 id); 136 struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id); 137 struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id); 138 struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id, 139 u64 pid); 140 void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp); 141 struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id); 142 struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid); 143 struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode); 144 unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp); 145 struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp); 146 void ksmbd_close_tree_conn_fds(struct ksmbd_work *work); 147 void ksmbd_close_session_fds(struct ksmbd_work *work); 148 int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode); 149 int ksmbd_init_global_file_table(void); 150 void ksmbd_free_global_file_table(void); 151 void ksmbd_set_fd_limit(unsigned long limit); 152 void ksmbd_update_fstate(struct ksmbd_file_table *ft, struct ksmbd_file *fp, 153 unsigned int state); 154 155 /* 156 * INODE hash 157 */ 158 int __init ksmbd_inode_hash_init(void); 159 void ksmbd_release_inode_hash(void); 160 161 enum KSMBD_INODE_STATUS { 162 KSMBD_INODE_STATUS_OK, 163 KSMBD_INODE_STATUS_UNKNOWN, 164 KSMBD_INODE_STATUS_PENDING_DELETE, 165 }; 166 167 int ksmbd_query_inode_status(struct inode *inode); 168 bool ksmbd_inode_pending_delete(struct ksmbd_file *fp); 169 void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp); 170 void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp); 171 void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp, 172 int file_info); 173 int ksmbd_init_file_cache(void); 174 void ksmbd_exit_file_cache(void); 175 #endif /* __VFS_CACHE_H__ */ 176