i386/linux-2.3.21/include/asm-sparc64/namei.h

   1 /* $Id: namei.h,v 1.15 1999/06/10 05:23:17 davem Exp $
   2  * linux/include/asm-sparc64/namei.h
   3  *
   4  * Routines to handle famous /usr/gnemul/s*.
   5  * Included from linux/fs/namei.c
   6  */
   7
   8 #ifndef __SPARC64_NAMEI_H
   9 #define __SPARC64_NAMEI_H
  10
  11 #define SPARC_BSD_EMUL "usr/gnemul/sunos/"
  12 #define SPARC_SOL_EMUL "usr/gnemul/solaris/"
  13
  14 static inline struct dentry *
  15 __sparc64_lookup_dentry(const char *name, int lookup_flags)
  16 {
  17         struct dentry *base;
  18         char *emul;
  19
  20         switch (current->personality) {
  21         case PER_BSD:
  22                 emul = SPARC_BSD_EMUL; break;
  23         case PER_SVR4:
  24                 emul = SPARC_SOL_EMUL; break;
  25         default:
  26                 return NULL;
  27         }
  28
  29         base = lookup_dentry (emul,
  30                               dget (current->fs->root),
  31                               (LOOKUP_FOLLOW | LOOKUP_DIRECTORY));
  32
  33         if (IS_ERR (base)) return NULL;
  34
  35         base = lookup_dentry (name, base, lookup_flags);
  36
  37         if (IS_ERR (base)) return NULL;
  38
  39         if (!base->d_inode) {
  40                 struct dentry *fromroot;
  41
  42                 fromroot = lookup_dentry (name, dget (current->fs->root), lookup_flags);
  43
  44                 if (IS_ERR (fromroot)) return base;
  45
  46                 if (fromroot->d_inode) {
  47                         dput(base);
  48                         return fromroot;
  49                 }
  50
  51                 dput(fromroot);
  52         }
  53
  54         return base;
  55 }
  56
  57 #define __prefix_lookup_dentry(name, lookup_flags)                              \
  58         if (current->personality) {                                             \
  59                 dentry = __sparc64_lookup_dentry (name, lookup_flags);          \
  60                 if (dentry) return dentry;                                      \
  61         }
  62
  63 #endif /* __SPARC64_NAMEI_H */