[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/fs/ext4/ext4_jbd2.c b/src/kernel/linux/v4.14/fs/ext4/ext4_jbd2.c
new file mode 100644
index 0000000..7c70b08
--- /dev/null
+++ b/src/kernel/linux/v4.14/fs/ext4/ext4_jbd2.c
@@ -0,0 +1,332 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Interface between ext4 and JBD
+ */
+
+#include "ext4_jbd2.h"
+
+#include <trace/events/ext4.h>
+
+/* Just increment the non-pointer handle value */
+static handle_t *ext4_get_nojournal(void)
+{
+ handle_t *handle = current->journal_info;
+ unsigned long ref_cnt = (unsigned long)handle;
+
+ BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
+
+ ref_cnt++;
+ handle = (handle_t *)ref_cnt;
+
+ current->journal_info = handle;
+ return handle;
+}
+
+
+/* Decrement the non-pointer handle value */
+static void ext4_put_nojournal(handle_t *handle)
+{
+ unsigned long ref_cnt = (unsigned long)handle;
+
+ BUG_ON(ref_cnt == 0);
+
+ ref_cnt--;
+ handle = (handle_t *)ref_cnt;
+
+ current->journal_info = handle;
+}
+
+/*
+ * Wrappers for jbd2_journal_start/end.
+ */
+static int ext4_journal_check_start(struct super_block *sb)
+{
+ journal_t *journal;
+
+ might_sleep();
+
+ if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
+ return -EIO;
+
+ if (sb_rdonly(sb))
+ return -EROFS;
+ WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);
+ journal = EXT4_SB(sb)->s_journal;
+ /*
+ * Special case here: if the journal has aborted behind our
+ * backs (eg. EIO in the commit thread), then we still need to
+ * take the FS itself readonly cleanly.
+ */
+ if (journal && is_journal_aborted(journal)) {
+ ext4_abort(sb, "Detected aborted journal");
+ return -EROFS;
+ }
+ return 0;
+}
+
+handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
+ int type, int blocks, int rsv_blocks)
+{
+ journal_t *journal;
+ int err;
+
+ trace_ext4_journal_start(sb, blocks, rsv_blocks, _RET_IP_);
+ err = ext4_journal_check_start(sb);
+ if (err < 0)
+ return ERR_PTR(err);
+
+ journal = EXT4_SB(sb)->s_journal;
+ if (!journal)
+ return ext4_get_nojournal();
+ return jbd2__journal_start(journal, blocks, rsv_blocks, GFP_NOFS,
+ type, line);
+}
+
+int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
+{
+ struct super_block *sb;
+ int err;
+ int rc;
+
+ if (!ext4_handle_valid(handle)) {
+ ext4_put_nojournal(handle);
+ return 0;
+ }
+
+ err = handle->h_err;
+ if (!handle->h_transaction) {
+ rc = jbd2_journal_stop(handle);
+ return err ? err : rc;
+ }
+
+ sb = handle->h_transaction->t_journal->j_private;
+ rc = jbd2_journal_stop(handle);
+
+ if (!err)
+ err = rc;
+ if (err)
+ __ext4_std_error(sb, where, line, err);
+ return err;
+}
+
+handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
+ int type)
+{
+ struct super_block *sb;
+ int err;
+
+ if (!ext4_handle_valid(handle))
+ return ext4_get_nojournal();
+
+ sb = handle->h_journal->j_private;
+ trace_ext4_journal_start_reserved(sb, handle->h_buffer_credits,
+ _RET_IP_);
+ err = ext4_journal_check_start(sb);
+ if (err < 0) {
+ jbd2_journal_free_reserved(handle);
+ return ERR_PTR(err);
+ }
+
+ err = jbd2_journal_start_reserved(handle, type, line);
+ if (err < 0)
+ return ERR_PTR(err);
+ return handle;
+}
+
+static void ext4_journal_abort_handle(const char *caller, unsigned int line,
+ const char *err_fn,
+ struct buffer_head *bh,
+ handle_t *handle, int err)
+{
+ char nbuf[16];
+ const char *errstr = ext4_decode_error(NULL, err, nbuf);
+
+ BUG_ON(!ext4_handle_valid(handle));
+
+ if (bh)
+ BUFFER_TRACE(bh, "abort");
+
+ if (!handle->h_err)
+ handle->h_err = err;
+
+ if (is_handle_aborted(handle))
+ return;
+
+ printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n",
+ caller, line, errstr, err_fn);
+
+ jbd2_journal_abort_handle(handle);
+}
+
+int __ext4_journal_get_write_access(const char *where, unsigned int line,
+ handle_t *handle, struct buffer_head *bh)
+{
+ int err = 0;
+
+ might_sleep();
+
+ if (ext4_handle_valid(handle)) {
+ err = jbd2_journal_get_write_access(handle, bh);
+ if (err)
+ ext4_journal_abort_handle(where, line, __func__, bh,
+ handle, err);
+ }
+ return err;
+}
+
+/*
+ * The ext4 forget function must perform a revoke if we are freeing data
+ * which has been journaled. Metadata (eg. indirect blocks) must be
+ * revoked in all cases.
+ *
+ * "bh" may be NULL: a metadata block may have been freed from memory
+ * but there may still be a record of it in the journal, and that record
+ * still needs to be revoked.
+ *
+ * If the handle isn't valid we're not journaling, but we still need to
+ * call into ext4_journal_revoke() to put the buffer head.
+ */
+int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
+ int is_metadata, struct inode *inode,
+ struct buffer_head *bh, ext4_fsblk_t blocknr)
+{
+ int err;
+
+ might_sleep();
+
+ trace_ext4_forget(inode, is_metadata, blocknr);
+ BUFFER_TRACE(bh, "enter");
+
+ jbd_debug(4, "forgetting bh %p: is_metadata = %d, mode %o, "
+ "data mode %x\n",
+ bh, is_metadata, inode->i_mode,
+ test_opt(inode->i_sb, DATA_FLAGS));
+
+ /* In the no journal case, we can just do a bforget and return */
+ if (!ext4_handle_valid(handle)) {
+ bforget(bh);
+ return 0;
+ }
+
+ /* Never use the revoke function if we are doing full data
+ * journaling: there is no need to, and a V1 superblock won't
+ * support it. Otherwise, only skip the revoke on un-journaled
+ * data blocks. */
+
+ if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ||
+ (!is_metadata && !ext4_should_journal_data(inode))) {
+ if (bh) {
+ BUFFER_TRACE(bh, "call jbd2_journal_forget");
+ err = jbd2_journal_forget(handle, bh);
+ if (err)
+ ext4_journal_abort_handle(where, line, __func__,
+ bh, handle, err);
+ return err;
+ }
+ return 0;
+ }
+
+ /*
+ * data!=journal && (is_metadata || should_journal_data(inode))
+ */
+ BUFFER_TRACE(bh, "call jbd2_journal_revoke");
+ err = jbd2_journal_revoke(handle, blocknr, bh);
+ if (err) {
+ ext4_journal_abort_handle(where, line, __func__,
+ bh, handle, err);
+ __ext4_abort(inode->i_sb, where, line,
+ "error %d when attempting revoke", err);
+ }
+ BUFFER_TRACE(bh, "exit");
+ return err;
+}
+
+int __ext4_journal_get_create_access(const char *where, unsigned int line,
+ handle_t *handle, struct buffer_head *bh)
+{
+ int err = 0;
+
+ if (ext4_handle_valid(handle)) {
+ err = jbd2_journal_get_create_access(handle, bh);
+ if (err)
+ ext4_journal_abort_handle(where, line, __func__,
+ bh, handle, err);
+ }
+ return err;
+}
+
+int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
+ handle_t *handle, struct inode *inode,
+ struct buffer_head *bh)
+{
+ int err = 0;
+
+ might_sleep();
+
+ set_buffer_meta(bh);
+ set_buffer_prio(bh);
+ if (ext4_handle_valid(handle)) {
+ err = jbd2_journal_dirty_metadata(handle, bh);
+ /* Errors can only happen due to aborted journal or a nasty bug */
+ if (!is_handle_aborted(handle) && WARN_ON_ONCE(err)) {
+ ext4_journal_abort_handle(where, line, __func__, bh,
+ handle, err);
+ if (inode == NULL) {
+ pr_err("EXT4: jbd2_journal_dirty_metadata "
+ "failed: handle type %u started at "
+ "line %u, credits %u/%u, errcode %d",
+ handle->h_type,
+ handle->h_line_no,
+ handle->h_requested_credits,
+ handle->h_buffer_credits, err);
+ return err;
+ }
+ ext4_error_inode(inode, where, line,
+ bh->b_blocknr,
+ "journal_dirty_metadata failed: "
+ "handle type %u started at line %u, "
+ "credits %u/%u, errcode %d",
+ handle->h_type,
+ handle->h_line_no,
+ handle->h_requested_credits,
+ handle->h_buffer_credits, err);
+ }
+ } else {
+ if (inode)
+ mark_buffer_dirty_inode(bh, inode);
+ else
+ mark_buffer_dirty(bh);
+ if (inode && inode_needs_sync(inode)) {
+ sync_dirty_buffer(bh);
+ if (buffer_req(bh) && !buffer_uptodate(bh)) {
+ struct ext4_super_block *es;
+
+ es = EXT4_SB(inode->i_sb)->s_es;
+ es->s_last_error_block =
+ cpu_to_le64(bh->b_blocknr);
+ ext4_error_inode(inode, where, line,
+ bh->b_blocknr,
+ "IO error syncing itable block");
+ err = -EIO;
+ }
+ }
+ }
+ return err;
+}
+
+int __ext4_handle_dirty_super(const char *where, unsigned int line,
+ handle_t *handle, struct super_block *sb)
+{
+ struct buffer_head *bh = EXT4_SB(sb)->s_sbh;
+ int err = 0;
+
+ ext4_superblock_csum_set(sb);
+ if (ext4_handle_valid(handle)) {
+ err = jbd2_journal_dirty_metadata(handle, bh);
+ if (err)
+ ext4_journal_abort_handle(where, line, __func__,
+ bh, handle, err);
+ } else
+ mark_buffer_dirty(bh);
+ return err;
+}