diff options
Diffstat (limited to 'fs/ksmbd/vfs_cache.h')
| -rw-r--r-- | fs/ksmbd/vfs_cache.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/fs/ksmbd/vfs_cache.h b/fs/ksmbd/vfs_cache.h new file mode 100644 index 000000000000..70dfe6a99f13 --- /dev/null +++ b/fs/ksmbd/vfs_cache.h @@ -0,0 +1,178 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2019 Samsung Electronics Co., Ltd. + */ + +#ifndef __VFS_CACHE_H__ +#define __VFS_CACHE_H__ + +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/rwsem.h> +#include <linux/spinlock.h> +#include <linux/idr.h> +#include <linux/workqueue.h> + +#include "vfs.h" + +/* Windows style file permissions for extended response */ +#define FILE_GENERIC_ALL 0x1F01FF +#define FILE_GENERIC_READ 0x120089 +#define FILE_GENERIC_WRITE 0x120116 +#define FILE_GENERIC_EXECUTE 0X1200a0 + +#define KSMBD_START_FID 0 +#define KSMBD_NO_FID (INT_MAX) +#define SMB2_NO_FID (0xFFFFFFFFFFFFFFFFULL) + +struct ksmbd_conn; +struct ksmbd_session; + +struct ksmbd_lock { + struct file_lock *fl; + struct list_head clist; + struct list_head flist; + struct list_head llist; + unsigned int flags; + int cmd; + int zero_len; + unsigned long long start; + unsigned long long end; +}; + +struct stream { + char *name; + ssize_t size; +}; + +struct ksmbd_inode { + rwlock_t m_lock; + atomic_t m_count; + atomic_t op_count; + /* opinfo count for streams */ + atomic_t sop_count; + struct inode *m_inode; + unsigned int m_flags; + struct hlist_node m_hash; + struct list_head m_fp_list; + struct list_head m_op_list; + struct oplock_info *m_opinfo; + __le32 m_fattr; +}; + +struct ksmbd_file { + struct file *filp; + char *filename; + u64 persistent_id; + u64 volatile_id; + + spinlock_t f_lock; + + struct ksmbd_inode *f_ci; + struct ksmbd_inode *f_parent_ci; + struct oplock_info __rcu *f_opinfo; + struct ksmbd_conn *conn; + struct ksmbd_tree_connect *tcon; + + atomic_t refcount; + __le32 daccess; + __le32 saccess; + __le32 coption; + __le32 cdoption; + __u64 create_time; + __u64 itime; + + bool is_nt_open; + bool attrib_only; + + char client_guid[16]; + char create_guid[16]; + char app_instance_id[16]; + + struct stream stream; + struct list_head node; + struct list_head blocked_works; + struct list_head lock_list; + + int durable_timeout; + + /* for SMB1 */ + int pid; + + /* conflict lock fail count for SMB1 */ + unsigned int cflock_cnt; + /* last lock failure start offset for SMB1 */ + unsigned long long llock_fstart; + + int dirent_offset; + + /* if ls is happening on directory, below is valid*/ + struct ksmbd_readdir_data readdir_data; + int dot_dotdot[2]; +}; + +static inline void set_ctx_actor(struct dir_context *ctx, + filldir_t actor) +{ + ctx->actor = actor; +} + +#define KSMBD_NR_OPEN_DEFAULT BITS_PER_LONG + +struct ksmbd_file_table { + rwlock_t lock; + struct idr *idr; +}; + +static inline bool has_file_id(u64 id) +{ + return id < KSMBD_NO_FID; +} + +static inline bool ksmbd_stream_fd(struct ksmbd_file *fp) +{ + return fp->stream.name != NULL; +} + +int ksmbd_init_file_table(struct ksmbd_file_table *ft); +void ksmbd_destroy_file_table(struct ksmbd_file_table *ft); +int ksmbd_close_fd(struct ksmbd_work *work, u64 id); +struct ksmbd_file *ksmbd_lookup_fd_fast(struct ksmbd_work *work, u64 id); +struct ksmbd_file *ksmbd_lookup_foreign_fd(struct ksmbd_work *work, u64 id); +struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id, + u64 pid); +void ksmbd_fd_put(struct ksmbd_work *work, struct ksmbd_file *fp); +struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id); +struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid); +struct ksmbd_file *ksmbd_lookup_fd_inode(struct inode *inode); +unsigned int ksmbd_open_durable_fd(struct ksmbd_file *fp); +struct ksmbd_file *ksmbd_open_fd(struct ksmbd_work *work, struct file *filp); +void ksmbd_close_tree_conn_fds(struct ksmbd_work *work); +void ksmbd_close_session_fds(struct ksmbd_work *work); +int ksmbd_close_inode_fds(struct ksmbd_work *work, struct inode *inode); +int ksmbd_init_global_file_table(void); +void ksmbd_free_global_file_table(void); +int ksmbd_file_table_flush(struct ksmbd_work *work); +void ksmbd_set_fd_limit(unsigned long limit); + +/* + * INODE hash + */ +int __init ksmbd_inode_hash_init(void); +void ksmbd_release_inode_hash(void); + +enum KSMBD_INODE_STATUS { + KSMBD_INODE_STATUS_OK, + KSMBD_INODE_STATUS_UNKNOWN, + KSMBD_INODE_STATUS_PENDING_DELETE, +}; + +int ksmbd_query_inode_status(struct inode *inode); +bool ksmbd_inode_pending_delete(struct ksmbd_file *fp); +void ksmbd_set_inode_pending_delete(struct ksmbd_file *fp); +void ksmbd_clear_inode_pending_delete(struct ksmbd_file *fp); +void ksmbd_fd_set_delete_on_close(struct ksmbd_file *fp, + int file_info); +int ksmbd_init_file_cache(void); +void ksmbd_exit_file_cache(void); +#endif /* __VFS_CACHE_H__ */ |