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

   1 --- a/fs/ext4/ext4.h
   2 +++ b/fs/ext4/ext4.h
   3 @@ -1778,6 +1778,19 @@ extern int ext4_orphan_add(handle_t *, s
   4  extern int ext4_orphan_del(handle_t *, struct inode *);
   5  extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
   6                                 __u32 start_minor_hash, __u32 *next_hash);
   7 +extern struct inode *ext4_create_inode(handle_t *handle,
   8 +                                      struct inode * dir, int mode);
   9 +extern int ext4_add_entry(handle_t *handle, struct dentry *dentry,
  10 +                         struct inode *inode);
  11 +extern int ext4_delete_entry(handle_t *handle, struct inode * dir,
  12 +                            struct ext4_dir_entry_2 * de_del,
  13 +                            struct buffer_head * bh);
  14 +extern struct buffer_head * ext4_find_entry(struct inode *dir,
  15 +                                           const struct qstr *d_name,
  16 +                                           struct ext4_dir_entry_2 ** res_dir);
  17 +#define ll_ext4_find_entry(inode, dentry, res_dir) ext4_find_entry(inode, &(dentry)->d_name, res_dir)
  18 +extern int ext4_add_dot_dotdot(handle_t *handle, struct inode *dir,
  19 +                              struct inode *inode);
  20
  21  /* resize.c */
  22  extern int ext4_group_add(struct super_block *sb,
  23 --- a/fs/ext4/namei.c
  24 +++ b/fs/ext4/namei.c
  25 @@ -24,6 +24,7 @@
  26   *     Theodore Ts'o, 2002
  27   */
  28
  29 +#include <linux/module.h>
  30  #include <linux/fs.h>
  31  #include <linux/pagemap.h>
  32  #include <linux/jbd2.h>
  33 @@ -873,9 +874,9 @@ static inline int search_dirblock(struct
  34   * The returned buffer_head has ->b_count elevated.  The caller is expected
  35   * to brelse() it when appropriate.
  36   */
  37 -static struct buffer_head * ext4_find_entry (struct inode *dir,
  38 -                                       const struct qstr *d_name,
  39 -                                       struct ext4_dir_entry_2 ** res_dir)
  40 +struct buffer_head * ext4_find_entry(struct inode *dir,
  41 +                                     const struct qstr *d_name,
  42 +                                     struct ext4_dir_entry_2 ** res_dir)
  43  {
  44         struct super_block *sb;
  45         struct buffer_head *bh_use[NAMEI_RA_SIZE];
  46 @@ -981,6 +982,7 @@ cleanup_and_exit:
  47                 brelse(bh_use[ra_ptr]);
  48         return ret;
  49  }
  50 +EXPORT_SYMBOL(ext4_find_entry);
  51
  52  static struct buffer_head * ext4_dx_find_entry(struct inode *dir, const struct qstr *d_name,
  53                        struct ext4_dir_entry_2 **res_dir, int *err)
  54 @@ -1515,8 +1517,8 @@ static int make_indexed_dir(handle_t *ha
  55   * may not sleep between calling this and putting something into
  56   * the entry, as someone else might have used it while you slept.
  57   */
  58 -static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
  59 -                         struct inode *inode)
  60 +int ext4_add_entry(handle_t *handle, struct dentry *dentry,
  61 +                  struct inode *inode)
  62  {
  63         struct inode *dir = dentry->d_parent->d_inode;
  64         struct buffer_head *bh;
  65 @@ -1565,6 +1567,7 @@ static int ext4_add_entry(handle_t *hand
  66         brelse(bh);
  67         return retval;
  68  }
  69 +EXPORT_SYMBOL(ext4_add_entry);
  70
  71  /*
  72   * Returns 0 for success, or a negative error value
  73 @@ -1704,10 +1707,10 @@ cleanup:
  74   * ext4_delete_entry deletes a directory entry by merging it with the
  75   * previous entry
  76   */
  77 -static int ext4_delete_entry(handle_t *handle,
  78 -                            struct inode *dir,
  79 -                            struct ext4_dir_entry_2 *de_del,
  80 -                            struct buffer_head *bh)
  81 +int ext4_delete_entry(handle_t *handle,
  82 +                     struct inode *dir,
  83 +                     struct ext4_dir_entry_2 *de_del,
  84 +                     struct buffer_head *bh)
  85  {
  86         struct ext4_dir_entry_2 *de, *pde;
  87         unsigned int blocksize = dir->i_sb->s_blocksize;
  88 @@ -1742,7 +1745,7 @@ static int ext4_delete_entry(handle_t *h
  89         }
  90         return -ENOENT;
  91  }
  92 -
  93 +EXPORT_SYMBOL(ext4_delete_entry);
  94  /*
  95   * DIR_NLINK feature is set if 1) nlinks > EXT4_LINK_MAX or 2) nlinks == 2,
  96   * since this indicates that nlinks count was previously 1.
  97 @@ -1806,6 +1809,29 @@ static unsigned ext4_dentry_goal(struct
  98         return inum;
  99  }
 100
 101 + /* Return locked inode, then the caller can modify the inode's states/flags
 102 +  * before others finding it. The caller should unlock the inode by itself. */
 103 +struct inode *ext4_create_inode(handle_t *handle, struct inode *dir, int mode)
 104 +{
 105 +       struct inode *inode;
 106 +
 107 +       inode = ext4_new_inode(handle, dir, mode, 0,
 108 +                              EXT4_SB(dir->i_sb)->s_inode_goal);
 109 +       if (!IS_ERR(inode)) {
 110 +               if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode)) {
 111 +#ifdef CONFIG_EXT4_FS_XATTR
 112 +                       inode->i_op = &ext4_special_inode_operations;
 113 +#endif
 114 +               } else {
 115 +                       inode->i_op = &ext4_file_inode_operations;
 116 +                       inode->i_fop = &ext4_file_operations;
 117 +                       ext4_set_aops(inode);
 118 +               }
 119 +       }
 120 +       return inode;
 121 +}
 122 +EXPORT_SYMBOL(ext4_create_inode);
 123 +
 124  /*
 125   * By the time this is called, we already have created
 126   * the directory cache entry for the new file, but it
 127 @@ -1882,44 +1908,32 @@ retry:
 128         return err;
 129  }
 130
 131 -static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 132 +/* Initialize @inode as a subdirectory of @dir, and add the
 133 + * "." and ".." entries into the first directory block. */
 134 +int ext4_add_dot_dotdot(handle_t *handle, struct inode * dir,
 135 +                       struct inode *inode)
 136  {
 137 -       handle_t *handle;
 138 -       struct inode *inode;
 139 -       struct buffer_head *dir_block = NULL;
 140 -       struct ext4_dir_entry_2 *de;
 141 +       struct buffer_head * dir_block;
 142 +       struct ext4_dir_entry_2 * de;
 143         unsigned int blocksize = dir->i_sb->s_blocksize;
 144 -       int err, retries = 0;
 145 +       int err = 0;
 146
 147 -       if (EXT4_DIR_LINK_MAX(dir))
 148 -               return -EMLINK;
 149 -
 150 -retry:
 151 -       handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
 152 -                                       EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
 153 -                                       EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb));
 154         if (IS_ERR(handle))
 155                 return PTR_ERR(handle);
 156
 157         if (IS_DIRSYNC(dir))
 158                 ext4_handle_sync(handle);
 159
 160 -       inode = ext4_new_inode(handle, dir, S_IFDIR | mode,
 161 -                              &dentry->d_name, 0);
 162 -       err = PTR_ERR(inode);
 163 -       if (IS_ERR(inode))
 164 -               goto out_stop;
 165 -
 166         inode->i_op = &ext4_dir_inode_operations;
 167         inode->i_fop = &ext4_dir_operations;
 168         inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
 169         dir_block = ext4_bread(handle, inode, 0, 1, &err);
 170         if (!dir_block)
 171 -               goto out_clear_inode;
 172 +               goto get_out;
 173         BUFFER_TRACE(dir_block, "get_write_access");
 174         err = ext4_journal_get_write_access(handle, dir_block);
 175         if (err)
 176 -               goto out_clear_inode;
 177 +               goto get_out;
 178         de = (struct ext4_dir_entry_2 *) dir_block->b_data;
 179         de->inode = cpu_to_le32(inode->i_ino);
 180         de->name_len = 1;
 181 @@ -1938,18 +1952,46 @@ retry:
 182         BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
 183         err = ext4_handle_dirty_metadata(handle, inode, dir_block);
 184         if (err)
 185 -               goto out_clear_inode;
 186 +               goto get_out;
 187         err = ext4_mark_inode_dirty(handle, inode);
 188 -       if (!err)
 189 -               err = ext4_add_entry(handle, dentry, inode);
 190 -       if (err) {
 191 -out_clear_inode:
 192 -               clear_nlink(inode);
 193 -               unlock_new_inode(inode);
 194 -               ext4_mark_inode_dirty(handle, inode);
 195 -               iput(inode);
 196 +get_out:
 197 +       brelse(dir_block);
 198 +       return err;
 199 +}
 200 +EXPORT_SYMBOL(ext4_add_dot_dotdot);
 201 +
 202 +
 203 +static int ext4_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 204 +{
 205 +       handle_t *handle;
 206 +       struct inode *inode;
 207 +       int err, retries = 0;
 208 +
 209 +       if (EXT4_DIR_LINK_MAX(dir))
 210 +               return -EMLINK;
 211 +
 212 +retry:
 213 +       handle = ext4_journal_start(dir, EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
 214 +                                       EXT4_INDEX_EXTRA_TRANS_BLOCKS + 3 +
 215 +                                       2*EXT4_QUOTA_INIT_BLOCKS(dir->i_sb));
 216 +       if (IS_ERR(handle))
 217 +               return PTR_ERR(handle);
 218 +
 219 +       if (IS_DIRSYNC(dir))
 220 +               ext4_handle_sync(handle);
 221 +
 222 +       inode = ext4_new_inode(handle, dir, S_IFDIR | mode, &dentry->d_name, 0);
 223 +       err = PTR_ERR(inode);
 224 +       if (IS_ERR(inode))
 225                 goto out_stop;
 226 -       }
 227 +
 228 +       err = ext4_add_dot_dotdot(handle, dir, inode);
 229 +       if (err)
 230 +               goto out_clear_inode;
 231 +
 232 +       err = ext4_add_entry(handle, dentry, inode);
 233 +       if (err)
 234 +               goto out_clear_inode;
 235         ext4_inc_count(handle, dir);
 236         ext4_update_dx_flag(dir);
 237         err = ext4_mark_inode_dirty(handle, dir);
 238 @@ -1958,11 +2001,16 @@ out_clear_inode:
 239         d_instantiate(dentry, inode);
 240         unlock_new_inode(inode);
 241  out_stop:
 242 -       brelse(dir_block);
 243         ext4_journal_stop(handle);
 244         if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
 245                 goto retry;
 246         return err;
 247 +out_clear_inode:
 248 +       clear_nlink(inode);
 249 +       unlock_new_inode(inode);
 250 +       ext4_mark_inode_dirty(handle, inode);
 251 +       iput(inode);
 252 +       goto out_stop;
 253  }
 254
 255  /*