1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (c) International Business Machines Corp., 2002, 2007 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * 7 */ 8 9 #ifndef _CIFSFS_H 10 #define _CIFSFS_H 11 12 #include <linux/hash.h> 13 #include <linux/dcache.h> 14 15 #define ROOT_I 2 16 17 extern atomic_t cifs_sillycounter; 18 extern atomic_t cifs_tmpcounter; 19 20 /* 21 * ino_t is 32-bits on 32-bit arch. We have to squash the 64-bit value down 22 * so that it will fit. We use hash_64 to convert the value to 31 bits, and 23 * then add 1, to ensure that we don't end up with a 0 as the value. 24 */ 25 static inline ino_t 26 cifs_uniqueid_to_ino_t(u64 fileid) 27 { 28 if ((sizeof(ino_t)) < (sizeof(u64))) 29 return (ino_t)hash_64(fileid, (sizeof(ino_t) * 8) - 1) + 1; 30 31 return (ino_t)fileid; 32 33 } 34 35 static inline void cifs_set_time(struct dentry *dentry, unsigned long time) 36 { 37 dentry->d_fsdata = (void *) time; 38 } 39 40 static inline unsigned long cifs_get_time(struct dentry *dentry) 41 { 42 return (unsigned long) dentry->d_fsdata; 43 } 44 45 extern struct file_system_type cifs_fs_type, smb3_fs_type; 46 extern const struct address_space_operations cifs_addr_ops; 47 extern const struct address_space_operations cifs_addr_ops_smallbuf; 48 49 /* Functions related to super block operations */ 50 void cifs_sb_active(struct super_block *sb); 51 void cifs_sb_deactive(struct super_block *sb); 52 53 /* Functions related to inodes */ 54 extern const struct inode_operations cifs_dir_inode_ops; 55 struct inode *cifs_root_iget(struct super_block *sb); 56 int cifs_create(struct mnt_idmap *idmap, struct inode *dir, 57 struct dentry *direntry, umode_t mode, bool excl); 58 int cifs_atomic_open(struct inode *dir, struct dentry *direntry, 59 struct file *file, unsigned int oflags, umode_t mode); 60 int cifs_tmpfile(struct mnt_idmap *idmap, struct inode *dir, 61 struct file *file, umode_t mode); 62 struct dentry *cifs_lookup(struct inode *parent_dir_inode, 63 struct dentry *direntry, unsigned int flags); 64 int cifs_unlink(struct inode *dir, struct dentry *dentry); 65 int cifs_hardlink(struct dentry *old_file, struct inode *inode, 66 struct dentry *direntry); 67 int cifs_mknod(struct mnt_idmap *idmap, struct inode *inode, 68 struct dentry *direntry, umode_t mode, dev_t device_number); 69 struct dentry *cifs_mkdir(struct mnt_idmap *idmap, struct inode *inode, 70 struct dentry *direntry, umode_t mode); 71 int cifs_rmdir(struct inode *inode, struct dentry *direntry); 72 int cifs_rename2(struct mnt_idmap *idmap, struct inode *source_dir, 73 struct dentry *source_dentry, struct inode *target_dir, 74 struct dentry *target_dentry, unsigned int flags); 75 int cifs_revalidate_file_attr(struct file *filp); 76 int cifs_revalidate_dentry_attr(struct dentry *dentry); 77 int cifs_revalidate_file(struct file *filp); 78 int cifs_revalidate_dentry(struct dentry *dentry); 79 int cifs_revalidate_mapping(struct inode *inode); 80 int cifs_zap_mapping(struct inode *inode); 81 int cifs_getattr(struct mnt_idmap *idmap, const struct path *path, 82 struct kstat *stat, u32 request_mask, unsigned int flags); 83 int cifs_setattr(struct mnt_idmap *idmap, struct dentry *direntry, 84 struct iattr *attrs); 85 int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start, 86 u64 len); 87 88 extern const struct inode_operations cifs_file_inode_ops; 89 extern const struct inode_operations cifs_symlink_inode_ops; 90 extern const struct inode_operations cifs_namespace_inode_operations; 91 92 93 /* Functions related to files and directories */ 94 extern const struct netfs_request_ops cifs_req_ops; 95 extern const struct file_operations cifs_file_ops; 96 extern const struct file_operations cifs_file_direct_ops; /* if directio mnt */ 97 extern const struct file_operations cifs_file_strict_ops; /* if strictio mnt */ 98 extern const struct file_operations cifs_file_nobrl_ops; /* no brlocks */ 99 extern const struct file_operations cifs_file_direct_nobrl_ops; 100 extern const struct file_operations cifs_file_strict_nobrl_ops; 101 int cifs_open(struct inode *inode, struct file *file); 102 int cifs_close(struct inode *inode, struct file *file); 103 int cifs_closedir(struct inode *inode, struct file *file); 104 ssize_t cifs_strict_readv(struct kiocb *iocb, struct iov_iter *to); 105 ssize_t cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from); 106 ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from); 107 ssize_t cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter); 108 int cifs_flock(struct file *file, int cmd, struct file_lock *fl); 109 int cifs_lock(struct file *file, int cmd, struct file_lock *flock); 110 int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync); 111 int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, 112 int datasync); 113 int cifs_flush(struct file *file, fl_owner_t id); 114 int cifs_file_mmap_prepare(struct vm_area_desc *desc); 115 int cifs_file_strict_mmap_prepare(struct vm_area_desc *desc); 116 extern const struct file_operations cifs_dir_ops; 117 int cifs_readdir(struct file *file, struct dir_context *ctx); 118 119 /* Functions related to dir entries */ 120 extern const struct dentry_operations cifs_dentry_ops; 121 extern const struct dentry_operations cifs_ci_dentry_ops; 122 123 struct vfsmount *cifs_d_automount(struct path *path); 124 125 /* Functions related to symlinks */ 126 const char *cifs_get_link(struct dentry *dentry, struct inode *inode, 127 struct delayed_call *done); 128 int cifs_symlink(struct mnt_idmap *idmap, struct inode *inode, 129 struct dentry *direntry, const char *symname); 130 131 #ifdef CONFIG_CIFS_XATTR 132 extern const struct xattr_handler * const cifs_xattr_handlers[]; 133 ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size); 134 #else 135 # define cifs_xattr_handlers NULL 136 # define cifs_listxattr NULL 137 #endif 138 139 ssize_t cifs_file_copychunk_range(unsigned int xid, struct file *src_file, 140 loff_t off, struct file *dst_file, 141 loff_t destoff, size_t len, 142 unsigned int flags); 143 144 long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg); 145 void cifs_setsize(struct inode *inode, loff_t offset); 146 147 struct smb3_fs_context; 148 struct dentry *cifs_smb3_do_mount(struct file_system_type *fs_type, int flags, 149 struct smb3_fs_context *old_ctx); 150 151 char *cifs_silly_fullpath(struct dentry *dentry); 152 153 #define CIFS_TMPNAME_PREFIX ".__smbfile_tmp" 154 #define CIFS_TMPNAME_LEN (DNAME_INLINE_LEN - 1) 155 156 #define CIFS_SILLYNAME_PREFIX ".__smbfile_silly" 157 #define CIFS_SILLYNAME_LEN (DNAME_INLINE_LEN - 1) 158 159 #ifdef CONFIG_CIFS_NFSD_EXPORT 160 extern const struct export_operations cifs_export_ops; 161 #endif /* CONFIG_CIFS_NFSD_EXPORT */ 162 163 /* when changing internal version - update following two lines at same time */ 164 #define SMB3_PRODUCT_BUILD 60 165 #define CIFS_VERSION "2.60" 166 #endif /* _CIFSFS_H */ 167