1 files changed, 52 insertions, 22 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index e659597b690b..e80fc513eacc 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -40,6 +40,7 @@
 #include <linux/workqueue.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
+#include <linux/ratelimit.h>
 
 #include "ext4_jbd2.h"
 #include "xattr.h"
@@ -54,10 +55,17 @@ static inline int ext4_begin_ordered_truncate(struct inode *inode,
                                               loff_t new_size)
 {
         trace_ext4_begin_ordered_truncate(inode, new_size);
-        return jbd2_journal_begin_ordered_truncate(
-                                        EXT4_SB(inode->i_sb)->s_journal,
-                                        &EXT4_I(inode)->jinode,
-                                        new_size);
+        /*
+         * If jinode is zero, then we never opened the file for
+         * writing, so there's no need to call
+         * jbd2_journal_begin_ordered_truncate() since there's no
+         * outstanding writes we need to flush.
+         */
+        if (!EXT4_I(inode)->jinode)
+                return 0;
+        return jbd2_journal_begin_ordered_truncate(EXT4_JOURNAL(inode),
+                                                   EXT4_I(inode)->jinode,
+                                                   new_size);
 }
 
 static void ext4_invalidatepage(struct page *page, unsigned long offset);
@@ -552,7 +560,7 @@ static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
 }
 
 /**
- *      ext4_blks_to_allocate: Look up the block map and count the number
+ *      ext4_blks_to_allocate - Look up the block map and count the number
  *      of direct blocks need to be allocated for the given branch.
  *
  *      @branch: chain of indirect blocks
@@ -591,13 +599,19 @@ static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks,
 
 /**
  *      ext4_alloc_blocks: multiple allocate blocks needed for a branch
+ *      @handle: handle for this transaction
+ *      @inode: inode which needs allocated blocks
+ *      @iblock: the logical block to start allocated at
+ *      @goal: preferred physical block of allocation
  *      @indirect_blks: the number of blocks need to allocate for indirect
  *                      blocks
- *
+ *      @blks: number of desired blocks
  *      @new_blocks: on return it will store the new block numbers for
  *      the indirect blocks(if needed) and the first direct block,
- *      @blks:  on return it will store the total number of allocated
- *              direct blocks
+ *      @err: on return it will store the error code
+ *
+ *      This function will return the number of blocks allocated as
+ *      requested by the passed-in parameters.
  */
 static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
                              ext4_lblk_t iblock, ext4_fsblk_t goal,
@@ -711,9 +725,11 @@ failed_out:
 
 /**
  *      ext4_alloc_branch - allocate and set up a chain of blocks.
+ *      @handle: handle for this transaction
  *      @inode: owner
  *      @indirect_blks: number of allocated indirect blocks
  *      @blks: number of allocated direct blocks
+ *      @goal: preferred place for allocation
  *      @offsets: offsets (in the blocks) to store the pointers to next.
  *      @branch: place to store the chain in.
  *
@@ -826,6 +842,7 @@ failed:
 
 /**
  * ext4_splice_branch - splice the allocated branch onto inode.
+ * @handle: handle for this transaction
  * @inode: owner
  * @block: (logical) number of block we are adding
  * @chain: chain of indirect blocks (with a missing link - see
@@ -1081,7 +1098,7 @@ static int ext4_indirect_calc_metadata_amount(struct inode *inode,
  * Calculate the number of metadata blocks need to reserve
  * to allocate a block located at @lblock
  */
-static int ext4_calc_metadata_amount(struct inode *inode, sector_t lblock)
+static int ext4_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock)
 {
         if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
                 return ext4_ext_calc_metadata_amount(inode, lblock);
@@ -1320,7 +1337,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
          * avoid double accounting
          */
         if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
-                EXT4_I(inode)->i_delalloc_reserved_flag = 1;
+                ext4_set_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
         /*
          * We need to check for EXT4 here because migrate
          * could have changed the inode type in between
@@ -1350,7 +1367,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
                         ext4_da_update_reserve_space(inode, retval, 1);
         }
         if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
-                EXT4_I(inode)->i_delalloc_reserved_flag = 0;
+                ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
 
         up_write((&EXT4_I(inode)->i_data_sem));
         if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
@@ -1878,7 +1895,7 @@ static int ext4_journalled_write_end(struct file *file,
 /*
  * Reserve a single block located at lblock
  */
-static int ext4_da_reserve_space(struct inode *inode, sector_t lblock)
+static int ext4_da_reserve_space(struct inode *inode, ext4_lblk_t lblock)
 {
         int retries = 0;
         struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -2239,7 +2256,7 @@ static void mpage_da_map_and_submit(struct mpage_da_data *mpd)
          * affects functions in many different parts of the allocation
          * call path.  This flag exists primarily because we don't
          * want to change *many* call functions, so ext4_map_blocks()
-         * will set the magic i_delalloc_reserved_flag once the
+         * will set the EXT4_STATE_DELALLOC_RESERVED flag once the
          * inode's allocation semaphore is taken.
          *
          * If the blocks in questions were delalloc blocks, set
@@ -3720,8 +3737,7 @@ static int ext4_set_bh_endio(struct buffer_head *bh, struct inode *inode)
 retry:
         io_end = ext4_init_io_end(inode, GFP_ATOMIC);
         if (!io_end) {
-                if (printk_ratelimit())
-                        printk(KERN_WARNING "%s: allocation fail\n", __func__);
+                pr_warning_ratelimited("%s: allocation fail\n", __func__);
                 schedule();
                 goto retry;
         }
@@ -4045,7 +4061,7 @@ int ext4_block_truncate_page(handle_t *handle,
         if (ext4_should_journal_data(inode)) {
                 err = ext4_handle_dirty_metadata(handle, inode, bh);
         } else {
-                if (ext4_should_order_data(inode))
+                if (ext4_should_order_data(inode) && EXT4_I(inode)->jinode)
                         err = ext4_jbd2_file_inode(handle, inode);
                 mark_buffer_dirty(bh);
         }
@@ -4169,6 +4185,7 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
 {
         __le32 *p;
         int     flags = EXT4_FREE_BLOCKS_FORGET | EXT4_FREE_BLOCKS_VALIDATED;
+        int     err;
 
         if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
                 flags |= EXT4_FREE_BLOCKS_METADATA;
@@ -4184,11 +4201,23 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
         if (try_to_extend_transaction(handle, inode)) {
                 if (bh) {
                         BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
-                        ext4_handle_dirty_metadata(handle, inode, bh);
+                        err = ext4_handle_dirty_metadata(handle, inode, bh);
+                        if (unlikely(err)) {
+                                ext4_std_error(inode->i_sb, err);
+                                return 1;
+                        }
+                }
+                err = ext4_mark_inode_dirty(handle, inode);
+                if (unlikely(err)) {
+                        ext4_std_error(inode->i_sb, err);
+                        return 1;
+                }
+                err = ext4_truncate_restart_trans(handle, inode,
+                                                  blocks_for_truncate(inode));
+                if (unlikely(err)) {
+                        ext4_std_error(inode->i_sb, err);
+                        return 1;
                 }
-                ext4_mark_inode_dirty(handle, inode);
-                ext4_truncate_restart_trans(handle, inode,
-                                            blocks_for_truncate(inode));
                 if (bh) {
                         BUFFER_TRACE(bh, "retaking write access");
                         ext4_journal_get_write_access(handle, bh);
@@ -4349,6 +4378,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
                                         (__le32 *) bh->b_data,
                                         (__le32 *) bh->b_data + addr_per_block,
                                         depth);
+                        brelse(bh);
 
                         /*
                          * Everything below this this pointer has been
@@ -4859,7 +4889,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
         }
         inode->i_nlink = le16_to_cpu(raw_inode->i_links_count);
 
-        ei->i_state_flags = 0;
+        ext4_clear_state_flags(ei);     /* Only relevant on 32-bit archs */
         ei->i_dir_start_lookup = 0;
         ei->i_dtime = le32_to_cpu(raw_inode->i_dtime);
         /* We now have enough fields to check if the inode was active or not.
@@ -5118,7 +5148,7 @@ static int ext4_do_update_inode(handle_t *handle,
         if (ext4_inode_blocks_set(handle, raw_inode, ei))
                 goto out_brelse;
         raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
-        raw_inode->i_flags = cpu_to_le32(ei->i_flags);
+        raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
         if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
             cpu_to_le32(EXT4_OS_HURD))
                 raw_inode->i_file_acl_high =