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Linux/include/linux/namei.h

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Diff markup

Differences between /include/linux/namei.h (Version linux-5.9.16) and /include/linux/namei.h (Version linux-4.19.206)


** Warning: Cannot open xref database.

  1 /* SPDX-License-Identifier: GPL-2.0 */              1 
  2 #ifndef _LINUX_NAMEI_H                            
  3 #define _LINUX_NAMEI_H                            
  4                                                   
  5 #include <linux/fs.h>                             
  6 #include <linux/kernel.h>                         
  7 #include <linux/path.h>                           
  8 #include <linux/fcntl.h>                          
  9 #include <linux/errno.h>                          
 10                                                   
 11 enum { MAX_NESTED_LINKS = 8 };                    
 12                                                   
 13 #define MAXSYMLINKS 40                            
 14                                                   
 15 /*                                                
 16  * Type of the last component on LOOKUP_PARENT    
 17  */                                               
 18 enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOT    
 19                                                   
 20 /* pathwalk mode */                               
 21 #define LOOKUP_FOLLOW           0x0001  /* fol    
 22 #define LOOKUP_DIRECTORY        0x0002  /* req    
 23 #define LOOKUP_AUTOMOUNT        0x0004  /* for    
 24 #define LOOKUP_EMPTY            0x4000  /* acc    
 25 #define LOOKUP_DOWN             0x8000  /* fol    
 26 #define LOOKUP_MOUNTPOINT       0x0080  /* fol    
 27                                                   
 28 #define LOOKUP_REVAL            0x0020  /* tel    
 29 #define LOOKUP_RCU              0x0040  /* RCU    
 30                                                   
 31 /* These tell filesystem methods that we are d    
 32 #define LOOKUP_OPEN             0x0100  /* ...    
 33 #define LOOKUP_CREATE           0x0200  /* ...    
 34 #define LOOKUP_EXCL             0x0400  /* ...    
 35 #define LOOKUP_RENAME_TARGET    0x0800  /* ...    
 36                                                   
 37 /* internal use only */                           
 38 #define LOOKUP_PARENT           0x0010            
 39 #define LOOKUP_JUMPED           0x1000            
 40 #define LOOKUP_ROOT             0x2000            
 41 #define LOOKUP_ROOT_GRABBED     0x0008            
 42                                                   
 43 /* Scoping flags for lookup. */                   
 44 #define LOOKUP_NO_SYMLINKS      0x010000 /* No    
 45 #define LOOKUP_NO_MAGICLINKS    0x020000 /* No    
 46 #define LOOKUP_NO_XDEV          0x040000 /* No    
 47 #define LOOKUP_BENEATH          0x080000 /* No    
 48 #define LOOKUP_IN_ROOT          0x100000 /* Tr    
 49 /* LOOKUP_* flags which do scope-related check    
 50 #define LOOKUP_IS_SCOPED (LOOKUP_BENEATH | LOO    
 51                                                   
 52 extern int path_pts(struct path *path);           
 53                                                   
 54 extern int user_path_at_empty(int, const char     
 55                                                   
 56 static inline int user_path_at(int dfd, const     
 57                  struct path *path)               
 58 {                                                 
 59         return user_path_at_empty(dfd, name, f    
 60 }                                                 
 61                                                   
 62 extern int kern_path(const char *, unsigned, s    
 63                                                   
 64 extern struct dentry *kern_path_create(int, co    
 65 extern struct dentry *user_path_create(int, co    
 66 extern void done_path_create(struct path *, st    
 67 extern struct dentry *kern_path_locked(const c    
 68                                                   
 69 extern struct dentry *try_lookup_one_len(const    
 70 extern struct dentry *lookup_one_len(const cha    
 71 extern struct dentry *lookup_one_len_unlocked(    
 72 extern struct dentry *lookup_positive_unlocked    
 73                                                   
 74 extern int follow_down_one(struct path *);        
 75 extern int follow_down(struct path *);            
 76 extern int follow_up(struct path *);              
 77                                                   
 78 extern struct dentry *lock_rename(struct dentr    
 79 extern void unlock_rename(struct dentry *, str    
 80                                                   
 81 extern int __must_check nd_jump_link(struct pa    
 82                                                   
 83 static inline void nd_terminate_link(void *nam    
 84 {                                                 
 85         ((char *) name)[min(len, maxlen)] = '\    
 86 }                                                 
 87                                                   
 88 /**                                               
 89  * retry_estale - determine whether the caller    
 90  * @error: the error that would currently be r    
 91  * @flags: flags being used for next lookup at    
 92  *                                                
 93  * Check to see if the error code was -ESTALE,    
 94  * to retry the call based on whether "flags"     
 95  *                                                
 96  * Returns true if the caller should try the o    
 97  */                                               
 98 static inline bool                                
 99 retry_estale(const long error, const unsigned     
100 {                                                 
101         return error == -ESTALE && !(flags & L    
102 }                                                 
103                                                   
104 #endif /* _LINUX_NAMEI_H */                       
105                                                   

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