Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (57 commits)
  jbd2: Fix oops in jbd2_journal_init_inode() on corrupted fs
  ext4: Remove "extents" mount option
  block: Add Kconfig help which notes that ext4 needs CONFIG_LBD
  ext4: Make printk's consistently prefixed with "EXT4-fs: "
  ext4: Add sanity checks for the superblock before mounting the filesystem
  ext4: Add mount option to set kjournald's I/O priority
  jbd2: Submit writes to the journal using WRITE_SYNC
  jbd2: Add pid and journal device name to the "kjournald2 starting" message
  ext4: Add markers for better debuggability
  ext4: Remove code to create the journal inode
  ext4: provide function to release metadata pages under memory pressure
  ext3: provide function to release metadata pages under memory pressure
  add releasepage hooks to block devices which can be used by file systems
  ext4: Fix s_dirty_blocks_counter if block allocation failed with nodelalloc
  ext4: Init the complete page while building buddy cache
  ext4: Don't allow new groups to be added during block allocation
  ext4: mark the blocks/inode bitmap beyond end of group as used
  ext4: Use new buffer_head flag to check uninit group bitmaps initialization
  ext4: Fix the race between read_inode_bitmap() and ext4_new_inode()
  ext4: code cleanup
  ...

5 files changed, 67 insertions, 4 deletions

diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h
index d76800f6ecf0..dd495b8c3091 100644
--- a/include/linux/ext3_fs.h
+++ b/include/linux/ext3_fs.h
@@ -378,6 +378,13 @@ struct ext3_inode {
 #define EXT3_ORPHAN_FS                  0x0004  /* Orphans being recovered */
 
 /*
+ * Misc. filesystem flags
+ */
+#define EXT2_FLAGS_SIGNED_HASH          0x0001  /* Signed dirhash in use */
+#define EXT2_FLAGS_UNSIGNED_HASH        0x0002  /* Unsigned dirhash in use */
+#define EXT2_FLAGS_TEST_FILESYS         0x0004  /* to test development code */
+
+/*
  * Mount flags
  */
 #define EXT3_MOUNT_CHECK                0x00001 /* Do mount-time checks */
@@ -513,7 +520,23 @@ struct ext3_super_block {
         __u16   s_reserved_word_pad;
         __le32  s_default_mount_opts;
         __le32  s_first_meta_bg;        /* First metablock block group */
-        __u32   s_reserved[190];        /* Padding to the end of the block */
+        __le32  s_mkfs_time;            /* When the filesystem was created */
+        __le32  s_jnl_blocks[17];       /* Backup of the journal inode */
+        /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
+/*150*/ __le32  s_blocks_count_hi;      /* Blocks count */
+        __le32  s_r_blocks_count_hi;    /* Reserved blocks count */
+        __le32  s_free_blocks_count_hi; /* Free blocks count */
+        __le16  s_min_extra_isize;      /* All inodes have at least # bytes */
+        __le16  s_want_extra_isize;     /* New inodes should reserve # bytes */
+        __le32  s_flags;                /* Miscellaneous flags */
+        __le16  s_raid_stride;          /* RAID stride */
+        __le16  s_mmp_interval;         /* # seconds to wait in MMP checking */
+        __le64  s_mmp_block;            /* Block for multi-mount protection */
+        __le32  s_raid_stripe_width;    /* blocks on all data disks (N*stride)*/
+        __u8    s_log_groups_per_flex;  /* FLEX_BG group size */
+        __u8    s_reserved_char_pad2;
+        __le16  s_reserved_pad;
+        __u32   s_reserved[162];        /* Padding to the end of the block */
 };
 
 #ifdef __KERNEL__
@@ -718,6 +741,9 @@ static inline __le16 ext3_rec_len_to_disk(unsigned len)
 #define DX_HASH_LEGACY          0
 #define DX_HASH_HALF_MD4        1
 #define DX_HASH_TEA             2
+#define DX_HASH_LEGACY_UNSIGNED 3
+#define DX_HASH_HALF_MD4_UNSIGNED       4
+#define DX_HASH_TEA_UNSIGNED            5
 
 #ifdef __KERNEL__
 
diff --git a/include/linux/ext3_fs_sb.h b/include/linux/ext3_fs_sb.h
index 76fdc0f4b028..f07f34de2f0e 100644
--- a/include/linux/ext3_fs_sb.h
+++ b/include/linux/ext3_fs_sb.h
@@ -57,6 +57,7 @@ struct ext3_sb_info {
         u32 s_next_generation;
         u32 s_hash_seed[4];
         int s_def_hash_version;
+        int s_hash_unsigned;    /* 3 if hash should be signed, 0 if not */
         struct percpu_counter s_freeblocks_counter;
         struct percpu_counter s_freeinodes_counter;
         struct percpu_counter s_dirs_counter;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e38a64d71eff..0b87b29f4797 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -565,6 +565,7 @@ struct address_space {
 struct block_device {
         dev_t                   bd_dev;  /* not a kdev_t - it's a search key */
         struct inode *          bd_inode;       /* will die */
+        struct super_block *    bd_super;
         int                     bd_openers;
         struct mutex            bd_mutex;       /* open/close mutex */
         struct semaphore        bd_mount_sem;
@@ -1389,6 +1390,7 @@ struct super_operations {
         ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
         ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
 #endif
+        int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
 };
 
 /*
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h
index f98a656b17e5..76dad4808847 100644
--- a/include/linux/ioprio.h
+++ b/include/linux/ioprio.h
@@ -86,4 +86,6 @@ static inline int task_nice_ioclass(struct task_struct *task)
  */
 extern int ioprio_best(unsigned short aprio, unsigned short bprio);
 
+extern int set_task_ioprio(struct task_struct *task, int ioprio);
+
 #endif
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 34456476e761..b45109c61fba 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -638,6 +638,11 @@ struct transaction_s
         unsigned long           t_expires;
 
         /*
+         * When this transaction started, in nanoseconds [no locking]
+         */
+        ktime_t                 t_start_time;
+
+        /*
          * How many handles used this transaction? [t_handle_lock]
          */
         int t_handle_count;
@@ -682,6 +687,8 @@ jbd2_time_diff(unsigned long start, unsigned long end)
         return end + (MAX_JIFFY_OFFSET - start);
 }
 
+#define JBD2_NR_BATCH   64
+
 /**
  * struct journal_s - The journal_s type is the concrete type associated with
  *     journal_t.
@@ -826,6 +833,14 @@ struct journal_s
         struct mutex            j_checkpoint_mutex;
 
         /*
+         * List of buffer heads used by the checkpoint routine.  This
+         * was moved from jbd2_log_do_checkpoint() to reduce stack
+         * usage.  Access to this array is controlled by the
+         * j_checkpoint_mutex.  [j_checkpoint_mutex]
+         */
+        struct buffer_head      *j_chkpt_bhs[JBD2_NR_BATCH];
+        
+        /*
          * Journal head: identifies the first unused block in the journal.
          * [j_state_lock]
          */
@@ -939,8 +954,26 @@ struct journal_s
         struct buffer_head      **j_wbuf;
         int                     j_wbufsize;
 
+        /*
+         * this is the pid of hte last person to run a synchronous operation
+         * through the journal
+         */
         pid_t                   j_last_sync_writer;
 
+        /*
+         * the average amount of time in nanoseconds it takes to commit a
+         * transaction to disk. [j_state_lock]
+         */
+        u64                     j_average_commit_time;
+
+        /*
+         * minimum and maximum times that we should wait for
+         * additional filesystem operations to get batched into a
+         * synchronous handle in microseconds
+         */
+        u32                     j_min_batch_time;
+        u32                     j_max_batch_time;
+
         /* This function is called when a transaction is closed */
         void                    (*j_commit_callback)(journal_t *,
                                                      transaction_t *);
@@ -1102,7 +1135,6 @@ extern int	   jbd2_journal_set_features
                    (journal_t *, unsigned long, unsigned long, unsigned long);
 extern void        jbd2_journal_clear_features
                    (journal_t *, unsigned long, unsigned long, unsigned long);
-extern int         jbd2_journal_create     (journal_t *);
 extern int         jbd2_journal_load       (journal_t *journal);
 extern int         jbd2_journal_destroy    (journal_t *);
 extern int         jbd2_journal_recover    (journal_t *journal);
@@ -1177,8 +1209,8 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid);
 int jbd2_log_do_checkpoint(journal_t *journal);
 
 void __jbd2_log_wait_for_space(journal_t *journal);
-extern void     __jbd2_journal_drop_transaction(journal_t *, transaction_t *);
-extern int      jbd2_cleanup_journal_tail(journal_t *);
+extern void __jbd2_journal_drop_transaction(journal_t *, transaction_t *);
+extern int jbd2_cleanup_journal_tail(journal_t *);
 
 /* Debugging code only: */