* We don't currently need any additional blocks for rmdir and
* unlink transactions because we are storing the OST oa_id inside
* the inode (which we will be changing anyways as part of this
- * transaction). When we store the oa_id in an EA (which may be
- * in an external block) we need to increase nblocks by 1.
+ * transaction).
*/
static void *mds_ext3_start(struct inode *inode, int op)
{
- int nblocks = 0;
+ /* For updates to the last recieved file */
+ int nblocks = EXT3_DATA_TRANS_BLOCKS;
switch(op) {
- case MDS_JOP_RMDIR:
- case MDS_JOP_UNLINK: nblocks = EXT3_DELETE_TRANS_BLOCKS; break;
+ case MDS_FSOP_RMDIR:
+ case MDS_FSOP_UNLINK:
+ nblocks += EXT3_DELETE_TRANS_BLOCKS; break;
+ case MDS_FSOP_RENAME:
+ nblocks += EXT3_DATA_TRANS_BLOCKS;
+ case MDS_FSOP_CREATE:
+ // FIXME: when we store oa_id in an EA we need more blocks
+ // nblocks += 0;
+ case MDS_FSOP_MKDIR:
+ case MDS_FSOP_SYMLINK:
+ /* Create new directory or symlink (more data blocks) */
+ nblocks += 2;
+ case MDS_FSOP_MKNOD:
+ /* Change parent directory + setattr on new inode */
+ nblocks += EXT3_DATA_TRANS_BLOCKS + 3;
}
return journal_start(EXT3_JOURNAL(inode), nblocks);
}
-static int mds_ext3_stop(void *handle, struct inode *inode)
+static int mds_ext3_commit(struct inode *inode, void *handle)
{
return journal_stop((handle_t *)handle);
}
-struct mds_journal_operations mds_ext3_journal_ops = {
- tr_start: mds_ext3_start,
- tr_commit: mds_ext3_stop,
+static int mds_ext3_setattr(struct dentry *dentry, void *handle,
+ struct iattr *iattr)
+{
+ struct inode *inode = dentry->d_inode;
+
+ /* a _really_ horrible hack to avoid removing the data stored
+ in the block pointers; this data is the object id
+ this will go into an extended attribute at some point.
+ */
+ if (iattr->ia_valid & ATTR_SIZE) {
+ /* ATTR_SIZE would invoke truncate: clear it */
+ iattr->ia_valid &= ~ATTR_SIZE;
+ inode->i_size = iattr->ia_size;
+
+ /* an _even_more_ horrible hack to make this hack work with
+ * ext3. This is because ext3 keeps a separate inode size
+ * until the inode is committed to ensure consistency. This
+ * will also go away with the move to EAs.
+ */
+ EXT3_I(inode)->i_disksize = inode->i_size;
+
+ /* make sure _something_ gets set - so new inode
+ goes to disk (probably won't work over XFS */
+ if (!iattr->ia_valid & ATTR_MODE) {
+ iattr->ia_valid |= ATTR_MODE;
+ iattr->ia_mode = inode->i_mode;
+ }
+ }
+
+ if (inode->i_op->setattr)
+ return inode->i_op->setattr(dentry, iattr);
+ else
+ return inode_setattr(inode, iattr);
+}
+
+/*
+ * FIXME: nasty hack - store the object id in the first two
+ * direct block spots. This should be done with EAs...
+ * Note also that this does not currently mark the inode
+ * dirty (it currently is used with other operations that
+ * subsequently also mark the inode dirty).
+ */
+static int mds_ext3_set_objid(struct inode *inode, void *handle, obd_id id)
+{
+ (__u64)EXT3_I(inode)->i_data[0] = cpu_to_le64(id);
+ return 0;
+}
+
+static void mds_ext3_get_objid(struct inode *inode, obd_id *id)
+{
+ *id = le64_to_cpu(EXT3_I(inode)->i_data[0]);
+}
+
+static ssize_t mds_ext3_readpage(struct file *file, char *buf, size_t count,
+ loff_t *offset)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ int rc = 0;
+
+ if (S_ISREG(inode->i_mode))
+ rc = file->f_op->read(file, buf, count, offset);
+ else {
+ struct buffer_head *bh;
+
+ /* FIXME: this assumes the blocksize == count, but the calling
+ * function will detect this as an error for now */
+ bh = ext3_bread(NULL, inode,
+ *offset >> inode->i_sb->s_blocksize_bits,
+ 0, &rc);
+
+ if (bh) {
+ memcpy(buf, bh->b_data, inode->i_blksize);
+ brelse(bh);
+ rc = inode->i_blksize;
+ }
+ }
+
+ return rc;
+}
+
+struct mds_fs_operations mds_ext3_fs_ops;
+
+void mds_ext3_delete_inode(struct inode *inode)
+{
+ void *handle;
+
+ if (S_ISREG(inode->i_mode)) {
+ handle = mds_ext3_start(inode, MDS_FSOP_UNLINK);
+
+ if (IS_ERR(handle)) {
+ CERROR("unable to start transaction");
+ EXIT;
+ return;
+ }
+ if (mds_ext3_set_objid(inode, handle, 0))
+ CERROR("error clearing objid on %ld\n", inode->i_ino);
+
+ if (mds_ext3_fs_ops.cl_delete_inode)
+ mds_ext3_fs_ops.cl_delete_inode(inode);
+
+ if (mds_ext3_commit(inode, handle))
+ CERROR("error closing handle on %ld\n", inode->i_ino);
+ } else
+ mds_ext3_fs_ops.cl_delete_inode(inode);
+}
+
+int mds_ext3_journal_data(struct inode *inode, struct file *filp)
+{
+ EXT3_I(inode)->i_flags |= EXT3_JOURNAL_DATA_FL;
+
+ return 0;
+}
+
+struct mds_fs_operations mds_ext3_fs_ops = {
+ fs_start: mds_ext3_start,
+ fs_commit: mds_ext3_commit,
+ fs_setattr: mds_ext3_setattr,
+ fs_set_objid: mds_ext3_set_objid,
+ fs_get_objid: mds_ext3_get_objid,
+ fs_readpage: mds_ext3_readpage,
+ fs_delete_inode:mds_ext3_delete_inode,
+ cl_delete_inode:clear_inode,
+ fs_journal_data:mds_ext3_journal_data,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff