symlink.c 1.5 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869
  1. /*
  2. * symlink.c
  3. *
  4. * Copyright (C) 2002 by John Newbigin
  5. *
  6. * Please add a note about your changes to smbfs in the ChangeLog file.
  7. */
  8. #include <linux/kernel.h>
  9. #include <linux/errno.h>
  10. #include <linux/fcntl.h>
  11. #include <linux/stat.h>
  12. #include <linux/mm.h>
  13. #include <linux/slab.h>
  14. #include <linux/pagemap.h>
  15. #include <linux/smp_lock.h>
  16. #include <linux/net.h>
  17. #include <linux/namei.h>
  18. #include <asm/uaccess.h>
  19. #include <asm/system.h>
  20. #include <linux/smbno.h>
  21. #include <linux/smb_fs.h>
  22. #include "smb_debug.h"
  23. #include "proto.h"
  24. int smb_symlink(struct inode *inode, struct dentry *dentry, const char *oldname)
  25. {
  26. DEBUG1("create symlink %s -> %s/%s\n", oldname, DENTRY_PATH(dentry));
  27. return smb_proc_symlink(server_from_dentry(dentry), dentry, oldname);
  28. }
  29. static void *smb_follow_link(struct dentry *dentry, struct nameidata *nd)
  30. {
  31. char *link = __getname();
  32. DEBUG1("followlink of %s/%s\n", DENTRY_PATH(dentry));
  33. if (!link) {
  34. link = ERR_PTR(-ENOMEM);
  35. } else {
  36. int len = smb_proc_read_link(server_from_dentry(dentry),
  37. dentry, link, PATH_MAX - 1);
  38. if (len < 0) {
  39. __putname(link);
  40. link = ERR_PTR(len);
  41. } else {
  42. link[len] = 0;
  43. }
  44. }
  45. nd_set_link(nd, link);
  46. return NULL;
  47. }
  48. static void smb_put_link(struct dentry *dentry, struct nameidata *nd, void *p)
  49. {
  50. char *s = nd_get_link(nd);
  51. if (!IS_ERR(s))
  52. __putname(s);
  53. }
  54. const struct inode_operations smb_link_inode_operations =
  55. {
  56. .readlink = generic_readlink,
  57. .follow_link = smb_follow_link,
  58. .put_link = smb_put_link,
  59. };