target/linux/generic-2.6/patches-2.6.30/215-mini_fo_2.6.30.patch

   1 --- a/fs/mini_fo/aux.c
   2 +++ b/fs/mini_fo/aux.c
   3 @@ -86,8 +86,10 @@ int get_neg_sto_dentry(dentry_t *dentry)
   4         len = dentry->d_name.len;
   5         name = dentry->d_name.name;
   6
   7 +       mutex_lock(&dtohd2(dentry->d_parent)->d_inode->i_mutex);
   8         dtohd2(dentry) =
   9                 lookup_one_len(name, dtohd2(dentry->d_parent), len);
  10 +       mutex_unlock(&dtohd2(dentry->d_parent)->d_inode->i_mutex);
  11
  12   out:
  13         return err;
  14 @@ -426,7 +428,9 @@ int build_sto_structure(dentry_t *dir, d
  15                 const unsigned char *name;
  16                 len = dtohd(dentry)->d_name.len;
  17                 name = dtohd(dentry)->d_name.name;
  18 +               mutex_lock(&dtohd2(dir)->d_inode->i_mutex);
  19                 hidden_sto_dentry = lookup_one_len(name, dtohd2(dir), len);
  20 +               mutex_unlock(&dtohd2(dir)->d_inode->i_mutex);
  21                 dtohd2(dentry) = hidden_sto_dentry;
  22         }
  23
  24 --- a/fs/mini_fo/inode.c
  25 +++ b/fs/mini_fo/inode.c
  26 @@ -113,17 +113,23 @@ mini_fo_lookup(inode_t *dir, dentry_t *d
  27                 hidden_dir_dentry = hidden_dentry->d_parent;
  28                 kfree(bpath);
  29         }
  30 -       else if(hidden_dir_dentry && hidden_dir_dentry->d_inode)
  31 +       else if(hidden_dir_dentry && hidden_dir_dentry->d_inode) {
  32 +               mutex_lock(&hidden_dir_dentry->d_inode->i_mutex);
  33                 hidden_dentry =
  34                         lookup_one_len(name, hidden_dir_dentry, namelen);
  35 -       else
  36 +               mutex_unlock(&hidden_dir_dentry->d_inode->i_mutex);
  37 +       } else {
  38                 hidden_dentry = NULL;
  39 +       }
  40
  41 -       if(hidden_sto_dir_dentry && hidden_sto_dir_dentry->d_inode)
  42 +       if(hidden_sto_dir_dentry && hidden_sto_dir_dentry->d_inode) {
  43 +               mutex_lock(&hidden_sto_dir_dentry->d_inode->i_mutex);
  44                 hidden_sto_dentry =
  45                         lookup_one_len(name, hidden_sto_dir_dentry, namelen);
  46 -       else
  47 +               mutex_unlock(&hidden_sto_dir_dentry->d_inode->i_mutex);
  48 +       } else {
  49                 hidden_sto_dentry =  NULL;
  50 +       }
  51
  52         /* catch error in lookup */
  53         if (IS_ERR(hidden_dentry) || IS_ERR(hidden_sto_dentry)) {
  54 @@ -553,9 +559,11 @@ mini_fo_rmdir(inode_t *dir, dentry_t *de
  55  #endif
  56
  57                 /* Delete an old WOL file contained in the storage dir */
  58 +               mutex_lock(&hidden_sto_dentry->d_inode->i_mutex);
  59                 meta_dentry = lookup_one_len(META_FILENAME,
  60                                              hidden_sto_dentry,
  61                                              strlen(META_FILENAME));
  62 +               mutex_unlock(&hidden_sto_dentry->d_inode->i_mutex);
  63                 if(meta_dentry->d_inode) {
  64                         err = vfs_unlink(hidden_sto_dentry->d_inode, meta_dentry);
  65                         dput(meta_dentry);
  66 @@ -643,9 +651,11 @@ mini_fo_rmdir(inode_t *dir, dentry_t *de
  67  #endif
  68
  69                 /* Delete an old WOL file contained in the storage dir */
  70 +               mutex_lock(&hidden_sto_dentry->d_inode->i_mutex);
  71                 meta_dentry = lookup_one_len(META_FILENAME,
  72                                              hidden_sto_dentry,
  73                                              strlen(META_FILENAME));
  74 +               mutex_unlock(&hidden_sto_dentry->d_inode->i_mutex);
  75                 if(meta_dentry->d_inode) {
  76                         /* is this necessary? dget(meta_dentry); */
  77                         err = vfs_unlink(hidden_sto_dentry->d_inode,
  78 @@ -688,9 +698,11 @@ mini_fo_rmdir(inode_t *dir, dentry_t *de
  79  #endif
  80
  81                 /* Delete an old WOL file contained in the storage dir */
  82 +               mutex_lock(&hidden_sto_dentry->d_inode->i_mutex);
  83                 meta_dentry = lookup_one_len(META_FILENAME,
  84                                              hidden_sto_dentry,
  85                                              strlen(META_FILENAME));
  86 +               mutex_unlock(&hidden_sto_dentry->d_inode->i_mutex);
  87                 if(meta_dentry->d_inode) {
  88                         /* is this necessary? dget(meta_dentry); */
  89                         err = vfs_unlink(hidden_sto_dentry->d_inode,
  90 --- a/fs/mini_fo/meta.c
  91 +++ b/fs/mini_fo/meta.c
  92 @@ -43,9 +43,11 @@ int meta_build_lists(dentry_t *dentry)
  93
  94         /* might there be a META-file? */
  95         if(dtohd2(dentry) && dtohd2(dentry)->d_inode) {
  96 +               mutex_lock(&dtohd2(dentry)->d_inode->i_mutex);
  97                 meta_dentry = lookup_one_len(META_FILENAME,
  98                                              dtohd2(dentry),
  99                                              strlen(META_FILENAME));
 100 +               mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
 101                 if(!meta_dentry->d_inode) {
 102                         dput(meta_dentry);
 103                         goto out_ok;
 104 @@ -426,8 +428,11 @@ int meta_write_d_entry(dentry_t *dentry,
 105                         goto out;
 106                  }
 107          }
 108 +
 109 +       mutex_lock(&dtohd2(dentry)->d_inode->i_mutex);
 110         meta_dentry = lookup_one_len(META_FILENAME,
 111                                      dtohd2(dentry), strlen (META_FILENAME));
 112 +       mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
 113
 114         /* We need to create a META-file */
 115          if(!meta_dentry->d_inode) {
 116 @@ -527,9 +532,13 @@ int meta_write_r_entry(dentry_t *dentry,
 117                         goto out;
 118                  }
 119          }
 120 +
 121 +       mutex_lock(&dtohd2(dentry)->d_inode->i_mutex);
 122         meta_dentry = lookup_one_len(META_FILENAME,
 123                                      dtohd2(dentry),
 124                                      strlen (META_FILENAME));
 125 +       mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
 126 +
 127          if(!meta_dentry->d_inode) {
 128                  /* We need to create a META-file */
 129  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 130 @@ -641,9 +650,13 @@ int meta_sync_d_list(dentry_t *dentry, i
 131                         goto out;
 132                  }
 133          }
 134 +
 135 +       mutex_lock(&dtohd2(dentry)->d_inode->i_mutex);
 136         meta_dentry = lookup_one_len(META_FILENAME,
 137                                      dtohd2(dentry),
 138                                      strlen(META_FILENAME));
 139 +       mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
 140 +
 141          if(!meta_dentry->d_inode) {
 142                  /* We need to create a META-file */
 143  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 144 @@ -784,9 +797,13 @@ int meta_sync_r_list(dentry_t *dentry, i
 145                         goto out;
 146                  }
 147          }
 148 +
 149 +       mutex_lock(&dtohd2(dentry)->d_inode->i_mutex);
 150         meta_dentry = lookup_one_len(META_FILENAME,
 151                                      dtohd2(dentry),
 152                                      strlen(META_FILENAME));
 153 +       mutex_unlock(&dtohd2(dentry)->d_inode->i_mutex);
 154 +
 155          if(!meta_dentry->d_inode) {
 156                  /* We need to create a META-file */
 157  #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)