ldiskfs/kernel_patches/patches/rhel6.3/ext4-osd-iop-common.patch

   1 diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
   2 index 1d41eef..87b4ea3 100644
   3 --- a/fs/ext4/ext4.h
   4 +++ b/fs/ext4/ext4.h
   5 @@ -1825,6 +1825,14 @@ extern int ext4_orphan_add(handle_t *, struct inode *);
   6  extern int ext4_orphan_del(handle_t *, struct inode *);
   7  extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
   8                                 __u32 start_minor_hash, __u32 *next_hash);
   9 +extern struct inode *ext4_create_inode(handle_t *handle,
  10 +                                      struct inode * dir, int mode,
  11 +                                      uid_t *owner);
  12 +extern int ext4_delete_entry(handle_t *handle, struct inode * dir,
  13 +                            struct ext4_dir_entry_2 * de_del,
  14 +                            struct buffer_head * bh);
  15 +extern int ext4_add_dot_dotdot(handle_t *handle, struct inode *dir,
  16 +                              struct inode *inode);
  17
  18  /* resize.c */
  19  extern int ext4_group_add(struct super_block *sb,
  20 diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
  21 index 6433d87..0f3783b 100644
  22 --- a/fs/ext4/namei.c
  23 +++ b/fs/ext4/namei.c
  24 @@ -24,6 +24,7 @@
  25   *     Theodore Ts'o, 2002
  26   */
  27
  28 +#include <linux/module.h>
  29  #include <linux/fs.h>
  30  #include <linux/pagemap.h>
  31  #include <linux/jbd2.h>
  32 @@ -1691,10 +1692,10 @@ cleanup:
  33   * ext4_delete_entry deletes a directory entry by merging it with the
  34   * previous entry
  35   */
  36 -static int ext4_delete_entry(handle_t *handle,
  37 -                            struct inode *dir,
  38 -                            struct ext4_dir_entry_2 *de_del,
  39 -                            struct buffer_head *bh)
  40 +int ext4_delete_entry(handle_t *handle,
  41 +                     struct inode *dir,
  42 +                     struct ext4_dir_entry_2 *de_del,
  43 +                     struct buffer_head *bh)
  44  {
  45         struct ext4_dir_entry_2 *de, *pde;
  46         unsigned int blocksize = dir->i_sb->s_blocksize;
  47 @@ -1729,7 +1730,7 @@ static int ext4_delete_entry(handle_t *handle,
  48         }
  49         return -ENOENT;
  50  }
  51 -
  52 +EXPORT_SYMBOL(ext4_delete_entry);
  53  /*
  54   * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
  55   * since this indicates that nlinks count was previously 1.
  56 @@ -1776,6 +1777,30 @@ static int ext4_add_nondir(handle_t *handle,
  57         return err;
  58  }
  59
  60 + /* Return locked inode, then the caller can modify the inode's states/flags
  61 +  * before others finding it. The caller should unlock the inode by itself. */
  62 +struct inode *ext4_create_inode(handle_t *handle, struct inode *dir, int mode,
  63 +                               uid_t *owner)
  64 +{
  65 +       struct inode *inode;
  66 +
  67 +       inode = ext4_new_inode(handle, dir, mode, 0,
  68 +                              EXT4_SB(dir->i_sb)->s_inode_goal);
  69 +       if (!IS_ERR(inode)) {
  70 +               if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode)) {
  71 +#ifdef CONFIG_EXT4_FS_XATTR
  72 +                       inode->i_op = &ext4_special_inode_operations;
  73 +#endif
  74 +               } else {
  75 +                       inode->i_op = &ext4_file_inode_operations;
  76 +                       inode->i_fop = &ext4_file_operations;
  77 +                       ext4_set_aops(inode);
  78 +               }
  79 +       }
  80 +       return inode;
  81 +}
  82 +EXPORT_SYMBOL(ext4_create_inode);
  83 +
  84  /*
  85   * By the time this is called, we already have created
  86   * the directory cache entry for the new file, but it
  87 @@ -1850,44 +1875,32 @@ retry:
  88         return err;
  89  }
  90
  91 -static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
  92 +/* Initialize @inode as a subdirectory of @dir, and add the
  93 + * "." and ".." entries into the first directory block. */
  94 +int ext4_add_dot_dotdot(handle_t *handle, struct inode * dir,
  95 +                       struct inode *inode)
  96  {
  97 -       handle_t *handle;
  98 -       struct inode *inode;
  99 -       struct buffer_head *dir_block = NULL;
 100 -       struct ext4_dir_entry_2 *de;
 101 +       struct buffer_head * dir_block;
 102 +       struct ext4_dir_entry_2 * de;
 103         unsigned int blocksize = dir->i_sb->s_blocksize;
 104 -       int err, retries = 0;
 105 -
 106 -       if (EXT4_DIR_LINK_MAX(dir))
 107 -               return -EMLINK;
 108 +       int err = 0;
 109
 110 -retry:
 111 -       handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
 112 -                                       EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
 113 -                                       EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
 114         if (IS_ERR(handle))
 115                 return PTR_ERR(handle);
 116
 117         if (IS_DIRSYNC(dir))
 118                 ext4_handle_sync(handle);
 119
 120 -       inode = ext4_new_inode(handle, dir, S_IFDIR | mode,
 121 -                              &dentry->d_name, 0);
 122 -       err = PTR_ERR(inode);
 123 -       if (IS_ERR(inode))
 124 -               goto out_stop;
 125 -
 126         inode->i_op = &ext4_dir_inode_operations;
 127         inode->i_fop = &ext4_dir_operations;
 128         inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
 129         dir_block = ext4_bread(handle, inode, 0, 1, &err);
 130         if (!dir_block)
 131 -               goto out_clear_inode;
 132 +               goto get_out;
 133         BUFFER_TRACE(dir_block, "get_write_access");
 134         err = ext4_journal_get_write_access(handle, dir_block);
 135         if (err)
 136 -               goto out_clear_inode;
 137 +               goto get_out;
 138         de = (struct ext4_dir_entry_2 *) dir_block->b_data;
 139         de->inode = cpu_to_le32(inode->i_ino);
 140         de->name_len = 1;
 141 @@ -1906,18 +1919,46 @@ retry:
 142         BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
 143         err = ext4_handle_dirty_metadata(handle, inode, dir_block);
 144         if (err)
 145 -               goto out_clear_inode;
 146 +               goto get_out;
 147         err = ext4_mark_inode_dirty(handle, inode);
 148 -       if (!err)
 149 -               err = ext4_add_entry(handle, dentry, inode);
 150 -       if (err) {
 151 -out_clear_inode:
 152 -               clear_nlink(inode);
 153 -               unlock_new_inode(inode);
 154 -               ext4_mark_inode_dirty(handle, inode);
 155 -               iput(inode);
 156 +get_out:
 157 +       brelse(dir_block);
 158 +       return err;
 159 +}
 160 +EXPORT_SYMBOL(ext4_add_dot_dotdot);
 161 +
 162 +
 163 +static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 164 +{
 165 +       handle_t *handle;
 166 +       struct inode *inode;
 167 +       int err, retries = 0;
 168 +
 169 +       if (EXT4_DIR_LINK_MAX(dir))
 170 +               return -EMLINK;
 171 +
 172 +retry:
 173 +       handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
 174 +                                       EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
 175 +                                       2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 176 +       if (IS_ERR(handle))
 177 +               return PTR_ERR(handle);
 178 +
 179 +       if (IS_DIRSYNC(dir))
 180 +               ext4_handle_sync(handle);
 181 +
 182 +       inode = ext4_new_inode(handle, dir, S_IFDIR | mode, &dentry->d_name, 0);
 183 +       err = PTR_ERR(inode);
 184 +       if (IS_ERR(inode))
 185                 goto out_stop;
 186 -       }
 187 +
 188 +       err = ext4_add_dot_dotdot(handle, dir, inode);
 189 +       if (err)
 190 +               goto out_clear_inode;
 191 +
 192 +       err = ext4_add_entry(handle, dentry, inode);
 193 +       if (err)
 194 +               goto out_clear_inode;
 195         ext4_inc_count(handle, dir);
 196         ext4_update_dx_flag(dir);
 197         err = ext4_mark_inode_dirty(handle, dir);
 198 @@ -1926,11 +1967,16 @@ out_clear_inode:
 199         d_instantiate(dentry, inode);
 200         unlock_new_inode(inode);
 201  out_stop:
 202 -       brelse(dir_block);
 203         ext4_journal_stop(handle);
 204         if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 205                 goto retry;
 206         return err;
 207 +out_clear_inode:
 208 +       clear_nlink(inode);
 209 +       unlock_new_inode(inode);
 210 +       ext4_mark_inode_dirty(handle, inode);
 211 +       iput(inode);
 212 +       goto out_stop;
 213  }
 214
 215  /*