fcntl.c 3.6 KB

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  1. /*
  2. * fs/cifs/fcntl.c
  3. *
  4. * vfs operations that deal with the file control API
  5. *
  6. * Copyright (C) International Business Machines Corp., 2003,2004
  7. * Author(s): Steve French (sfrench@us.ibm.com)
  8. *
  9. * This library is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU Lesser General Public License as published
  11. * by the Free Software Foundation; either version 2.1 of the License, or
  12. * (at your option) any later version.
  13. *
  14. * This library is distributed in the hope that it will be useful,
  15. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
  17. * the GNU Lesser General Public License for more details.
  18. *
  19. * You should have received a copy of the GNU Lesser General Public License
  20. * along with this library; if not, write to the Free Software
  21. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22. */
  23. #include <linux/fs.h>
  24. #include <linux/stat.h>
  25. #include <linux/fcntl.h>
  26. #include "cifsglob.h"
  27. #include "cifsproto.h"
  28. #include "cifs_unicode.h"
  29. #include "cifs_debug.h"
  30. #include "cifsfs.h"
  31. static __u32 convert_to_cifs_notify_flags(unsigned long fcntl_notify_flags)
  32. {
  33. __u32 cifs_ntfy_flags = 0;
  34. /* No way on Linux VFS to ask to monitor xattr
  35. changes (and no stream support either */
  36. if(fcntl_notify_flags & DN_ACCESS) {
  37. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_ACCESS;
  38. }
  39. if(fcntl_notify_flags & DN_MODIFY) {
  40. /* What does this mean on directories? */
  41. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE |
  42. FILE_NOTIFY_CHANGE_SIZE;
  43. }
  44. if(fcntl_notify_flags & DN_CREATE) {
  45. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_CREATION |
  46. FILE_NOTIFY_CHANGE_LAST_WRITE;
  47. }
  48. if(fcntl_notify_flags & DN_DELETE) {
  49. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_LAST_WRITE;
  50. }
  51. if(fcntl_notify_flags & DN_RENAME) {
  52. /* BB review this - checking various server behaviors */
  53. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_DIR_NAME |
  54. FILE_NOTIFY_CHANGE_FILE_NAME;
  55. }
  56. if(fcntl_notify_flags & DN_ATTRIB) {
  57. cifs_ntfy_flags |= FILE_NOTIFY_CHANGE_SECURITY |
  58. FILE_NOTIFY_CHANGE_ATTRIBUTES;
  59. }
  60. /* if(fcntl_notify_flags & DN_MULTISHOT) {
  61. cifs_ntfy_flags |= ;
  62. } */ /* BB fixme - not sure how to handle this with CIFS yet */
  63. return cifs_ntfy_flags;
  64. }
  65. int cifs_dir_notify(struct file * file, unsigned long arg)
  66. {
  67. int xid;
  68. int rc = -EINVAL;
  69. int oplock = FALSE;
  70. struct cifs_sb_info *cifs_sb;
  71. struct cifsTconInfo *pTcon;
  72. char *full_path = NULL;
  73. __u32 filter = FILE_NOTIFY_CHANGE_NAME | FILE_NOTIFY_CHANGE_ATTRIBUTES;
  74. __u16 netfid;
  75. if(experimEnabled == 0)
  76. return 0;
  77. xid = GetXid();
  78. cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
  79. pTcon = cifs_sb->tcon;
  80. full_path = build_path_from_dentry(file->f_path.dentry);
  81. if(full_path == NULL) {
  82. rc = -ENOMEM;
  83. } else {
  84. cFYI(1,("dir notify on file %s Arg 0x%lx",full_path,arg));
  85. rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
  86. GENERIC_READ | SYNCHRONIZE, 0 /* create options */,
  87. &netfid, &oplock,NULL, cifs_sb->local_nls,
  88. cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
  89. /* BB fixme - add this handle to a notify handle list */
  90. if(rc) {
  91. cFYI(1,("Could not open directory for notify"));
  92. } else {
  93. filter = convert_to_cifs_notify_flags(arg);
  94. if(filter != 0) {
  95. rc = CIFSSMBNotify(xid, pTcon,
  96. 0 /* no subdirs */, netfid,
  97. filter, file, arg & DN_MULTISHOT,
  98. cifs_sb->local_nls);
  99. } else {
  100. rc = -EINVAL;
  101. }
  102. /* BB add code to close file eventually (at unmount
  103. it would close automatically but may be a way
  104. to do it easily when inode freed or when
  105. notify info is cleared/changed */
  106. cFYI(1,("notify rc %d",rc));
  107. }
  108. }
  109. FreeXid(xid);
  110. return rc;
  111. }