lustre/llite/dcache.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * This code is issued under the GNU General Public License.
   5  * See the file COPYING in this distribution
   6  *
   7  * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
   8  *
   9  */
  10
  11 #include <linux/fs.h>
  12 #include <linux/locks.h>
  13 #include <linux/quotaops.h>
  14
  15 #define DEBUG_SUBSYSTEM S_LLITE
  16
  17 #include <linux/obd_support.h>
  18 #include <linux/lustre_lite.h>
  19 #include <linux/lustre_dlm.h>
  20
  21 extern struct address_space_operations ll_aops;
  22
  23 void ll_intent_release(struct dentry *de)
  24 {
  25         struct lustre_handle *handle;
  26         ENTRY;
  27
  28         if (de->d_it == NULL) {
  29                 EXIT;
  30                 return;
  31         }
  32         if (de->d_it->it_lock_mode) {
  33                 handle = (struct lustre_handle *)de->d_it->it_lock_handle;
  34                 if (de->d_it->it_op == IT_SETATTR) {
  35                         int rc;
  36                         ldlm_lock_decref(handle, de->d_it->it_lock_mode);
  37                         rc = ldlm_cli_cancel(handle);
  38                         if (rc < 0)
  39                                 CERROR("ldlm_cli_cancel: %d\n", rc);
  40                 } else
  41                         ldlm_lock_decref(handle, de->d_it->it_lock_mode);
  42         }
  43         de->d_it = NULL;
  44         EXIT;
  45 }
  46
  47 int ll_revalidate2(struct dentry *de, int flags, struct lookup_intent *it)
  48 {
  49         struct ll_sb_info *sbi = ll_s2sbi(de->d_sb);
  50         struct lustre_handle lockh;
  51         __u64 res_id[RES_NAME_SIZE] = {0};
  52         struct obd_device *obddev;
  53         ENTRY;
  54
  55         if (it)
  56                 RETURN(0); /* lookups will have NULL it */
  57
  58         if (!de->d_inode)
  59                 RETURN(0);
  60
  61         obddev = class_conn2obd(&sbi->ll_mdc_conn);
  62         res_id[0] = de->d_inode->i_ino;
  63
  64         CDEBUG(D_INFO, "trying to match res "LPU64"\n", res_id[0]);
  65
  66         if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_MDSINTENT,
  67                             NULL, 0, LCK_PR, &lockh)) {
  68                 ldlm_lock_decref(&lockh, LCK_PR);
  69                 RETURN(1);
  70         }
  71
  72         if (ldlm_lock_match(obddev->obd_namespace, res_id, LDLM_MDSINTENT,
  73                             NULL, 0, LCK_PW, &lockh)) {
  74                 ldlm_lock_decref(&lockh, LCK_PW);
  75                 RETURN(1);
  76         }
  77
  78         RETURN(0);
  79 }
  80
  81 struct dentry_operations ll_d_ops = {
  82         d_revalidate2: ll_revalidate2,
  83         d_intent_release: ll_intent_release
  84 };