1 files changed, 102 insertions, 39 deletions

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index cec3145e532c..5b0e26a1272d 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -144,9 +144,17 @@ struct ext4_allocation_request {
 #define EXT4_MAP_UNWRITTEN      (1 << BH_Unwritten)
 #define EXT4_MAP_BOUNDARY       (1 << BH_Boundary)
 #define EXT4_MAP_UNINIT         (1 << BH_Uninit)
+/* Sometimes (in the bigalloc case, from ext4_da_get_block_prep) the caller of
+ * ext4_map_blocks wants to know whether or not the underlying cluster has
+ * already been accounted for. EXT4_MAP_FROM_CLUSTER conveys to the caller that
+ * the requested mapping was from previously mapped (or delayed allocated)
+ * cluster. We use BH_AllocFromCluster only for this flag. BH_AllocFromCluster
+ * should never appear on buffer_head's state flags.
+ */
+#define EXT4_MAP_FROM_CLUSTER   (1 << BH_AllocFromCluster)
 #define EXT4_MAP_FLAGS          (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\
                                  EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\
-                                 EXT4_MAP_UNINIT)
+                                 EXT4_MAP_UNINIT | EXT4_MAP_FROM_CLUSTER)
 
 struct ext4_map_blocks {
         ext4_fsblk_t m_pblk;
@@ -239,8 +247,11 @@ struct ext4_io_submit {
 # define EXT4_BLOCK_SIZE(s)             (EXT4_MIN_BLOCK_SIZE << (s)->s_log_block_size)
 #endif
 #define EXT4_ADDR_PER_BLOCK(s)          (EXT4_BLOCK_SIZE(s) / sizeof(__u32))
+#define EXT4_CLUSTER_SIZE(s)            (EXT4_BLOCK_SIZE(s) << \
+                                         EXT4_SB(s)->s_cluster_bits)
 #ifdef __KERNEL__
 # define EXT4_BLOCK_SIZE_BITS(s)        ((s)->s_blocksize_bits)
+# define EXT4_CLUSTER_BITS(s)           (EXT4_SB(s)->s_cluster_bits)
 #else
 # define EXT4_BLOCK_SIZE_BITS(s)        ((s)->s_log_block_size + 10)
 #endif
@@ -258,6 +269,14 @@ struct ext4_io_submit {
 #endif
 #define EXT4_BLOCK_ALIGN(size, blkbits)         ALIGN((size), (1 << (blkbits)))
 
+/* Translate a block number to a cluster number */
+#define EXT4_B2C(sbi, blk)      ((blk) >> (sbi)->s_cluster_bits)
+/* Translate a cluster number to a block number */
+#define EXT4_C2B(sbi, cluster)  ((cluster) << (sbi)->s_cluster_bits)
+/* Translate # of blks to # of clusters */
+#define EXT4_NUM_B2C(sbi, blks) (((blks) + (sbi)->s_cluster_ratio - 1) >> \
+                                 (sbi)->s_cluster_bits)
+
 /*
  * Structure of a blocks group descriptor
  */
@@ -289,7 +308,7 @@ struct ext4_group_desc
 
 struct flex_groups {
         atomic_t free_inodes;
-        atomic_t free_blocks;
+        atomic_t free_clusters;
         atomic_t used_dirs;
 };
 
@@ -306,6 +325,7 @@ struct flex_groups {
 #define EXT4_DESC_SIZE(s)               (EXT4_SB(s)->s_desc_size)
 #ifdef __KERNEL__
 # define EXT4_BLOCKS_PER_GROUP(s)       (EXT4_SB(s)->s_blocks_per_group)
+# define EXT4_CLUSTERS_PER_GROUP(s)     (EXT4_SB(s)->s_clusters_per_group)
 # define EXT4_DESC_PER_BLOCK(s)         (EXT4_SB(s)->s_desc_per_block)
 # define EXT4_INODES_PER_GROUP(s)       (EXT4_SB(s)->s_inodes_per_group)
 # define EXT4_DESC_PER_BLOCK_BITS(s)    (EXT4_SB(s)->s_desc_per_block_bits)
@@ -358,8 +378,7 @@ struct flex_groups {
 
 /* Flags that should be inherited by new inodes from their parent. */
 #define EXT4_FL_INHERITED (EXT4_SECRM_FL | EXT4_UNRM_FL | EXT4_COMPR_FL |\
-                           EXT4_SYNC_FL | EXT4_IMMUTABLE_FL | EXT4_APPEND_FL |\
-                           EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
+                           EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
                            EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
                            EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL)
 
@@ -520,6 +539,8 @@ struct ext4_new_group_data {
 #define EXT4_GET_BLOCKS_PUNCH_OUT_EXT           0x0020
         /* Don't normalize allocation size (used for fallocate) */
 #define EXT4_GET_BLOCKS_NO_NORMALIZE            0x0040
+        /* Request will not result in inode size update (user for fallocate) */
+#define EXT4_GET_BLOCKS_KEEP_SIZE               0x0080
 
 /*
  * Flags used by ext4_free_blocks
@@ -528,6 +549,13 @@ struct ext4_new_group_data {
 #define EXT4_FREE_BLOCKS_FORGET         0x0002
 #define EXT4_FREE_BLOCKS_VALIDATED      0x0004
 #define EXT4_FREE_BLOCKS_NO_QUOT_UPDATE 0x0008
+#define EXT4_FREE_BLOCKS_NOFREE_FIRST_CLUSTER   0x0010
+#define EXT4_FREE_BLOCKS_NOFREE_LAST_CLUSTER    0x0020
+
+/*
+ * Flags used by ext4_discard_partial_page_buffers
+ */
+#define EXT4_DISCARD_PARTIAL_PG_ZERO_UNMAPPED   0x0001
 
 /*
  * ioctl commands
@@ -538,9 +566,6 @@ struct ext4_new_group_data {
 #define EXT4_IOC_SETVERSION             _IOW('f', 4, long)
 #define EXT4_IOC_GETVERSION_OLD         FS_IOC_GETVERSION
 #define EXT4_IOC_SETVERSION_OLD         FS_IOC_SETVERSION
-#ifdef CONFIG_JBD2_DEBUG
-#define EXT4_IOC_WAIT_FOR_READONLY      _IOR('f', 99, long)
-#endif
 #define EXT4_IOC_GETRSVSZ               _IOR('f', 5, long)
 #define EXT4_IOC_SETRSVSZ               _IOW('f', 6, long)
 #define EXT4_IOC_GROUP_EXTEND           _IOW('f', 7, unsigned long)
@@ -563,9 +588,6 @@ struct ext4_new_group_data {
 #define EXT4_IOC32_SETRSVSZ             _IOW('f', 6, int)
 #define EXT4_IOC32_GROUP_EXTEND         _IOW('f', 7, unsigned int)
 #define EXT4_IOC32_GROUP_ADD            _IOW('f', 8, struct compat_ext4_new_group_input)
-#ifdef CONFIG_JBD2_DEBUG
-#define EXT4_IOC32_WAIT_FOR_READONLY    _IOR('f', 99, int)
-#endif
 #define EXT4_IOC32_GETVERSION_OLD       FS_IOC32_GETVERSION
 #define EXT4_IOC32_SETVERSION_OLD       FS_IOC32_SETVERSION
 #endif
@@ -837,6 +859,7 @@ struct ext4_inode_info {
         ext4_group_t    i_last_alloc_group;
 
         /* allocation reservation info for delalloc */
+        /* In case of bigalloc, these refer to clusters rather than blocks */
         unsigned int i_reserved_data_blocks;
         unsigned int i_reserved_meta_blocks;
         unsigned int i_allocated_meta_blocks;
@@ -886,7 +909,6 @@ struct ext4_inode_info {
 /*
  * Mount flags
  */
-#define EXT4_MOUNT_OLDALLOC             0x00002  /* Don't use the new Orlov allocator */
 #define EXT4_MOUNT_GRPID                0x00004 /* Create files with directory's group */
 #define EXT4_MOUNT_DEBUG                0x00008 /* Some debugging messages */
 #define EXT4_MOUNT_ERRORS_CONT          0x00010 /* Continue on errors */
@@ -918,6 +940,9 @@ struct ext4_inode_info {
 #define EXT4_MOUNT_DISCARD              0x40000000 /* Issue DISCARD requests */
 #define EXT4_MOUNT_INIT_INODE_TABLE     0x80000000 /* Initialize uninitialized itables */
 
+#define EXT4_MOUNT2_EXPLICIT_DELALLOC   0x00000001 /* User explicitly
+                                                      specified delalloc */
+
 #define clear_opt(sb, opt)              EXT4_SB(sb)->s_mount_opt &= \
                                                 ~EXT4_MOUNT_##opt
 #define set_opt(sb, opt)                EXT4_SB(sb)->s_mount_opt |= \
@@ -968,9 +993,9 @@ struct ext4_super_block {
 /*10*/  __le32  s_free_inodes_count;    /* Free inodes count */
         __le32  s_first_data_block;     /* First Data Block */
         __le32  s_log_block_size;       /* Block size */
-        __le32  s_obso_log_frag_size;   /* Obsoleted fragment size */
+        __le32  s_log_cluster_size;     /* Allocation cluster size */
 /*20*/  __le32  s_blocks_per_group;     /* # Blocks per group */
-        __le32  s_obso_frags_per_group; /* Obsoleted fragments per group */
+        __le32  s_clusters_per_group;   /* # Clusters per group */
         __le32  s_inodes_per_group;     /* # Inodes per group */
         __le32  s_mtime;                /* Mount time */
 /*30*/  __le32  s_wtime;                /* Write time */
@@ -1066,7 +1091,10 @@ struct ext4_super_block {
         __u8    s_last_error_func[32];  /* function where the error happened */
 #define EXT4_S_ERR_END offsetof(struct ext4_super_block, s_mount_opts)
         __u8    s_mount_opts[64];
-        __le32  s_reserved[112];        /* Padding to the end of the block */
+        __le32  s_usr_quota_inum;       /* inode for tracking user quota */
+        __le32  s_grp_quota_inum;       /* inode for tracking group quota */
+        __le32  s_overhead_clusters;    /* overhead blocks/clusters in fs */
+        __le32  s_reserved[109];        /* Padding to the end of the block */
 };
 
 #define EXT4_S_ERR_LEN (EXT4_S_ERR_END - EXT4_S_ERR_START)
@@ -1086,6 +1114,7 @@ struct ext4_sb_info {
         unsigned long s_desc_size;      /* Size of a group descriptor in bytes */
         unsigned long s_inodes_per_block;/* Number of inodes per block */
         unsigned long s_blocks_per_group;/* Number of blocks in a group */
+        unsigned long s_clusters_per_group; /* Number of clusters in a group */
         unsigned long s_inodes_per_group;/* Number of inodes in a group */
         unsigned long s_itb_per_group;  /* Number of inode table blocks per group */
         unsigned long s_gdb_count;      /* Number of group descriptor blocks */
@@ -1094,6 +1123,8 @@ struct ext4_sb_info {
         ext4_group_t s_blockfile_groups;/* Groups acceptable for non-extent files */
         unsigned long s_overhead_last;  /* Last calculated overhead */
         unsigned long s_blocks_last;    /* Last seen block count */
+        unsigned int s_cluster_ratio;   /* Number of blocks per cluster */
+        unsigned int s_cluster_bits;    /* log2 of s_cluster_ratio */
         loff_t s_bitmap_maxbytes;       /* max bytes for bitmap files */
         struct buffer_head * s_sbh;     /* Buffer containing the super block */
         struct ext4_super_block *s_es;  /* Pointer to the super block in the buffer */
@@ -1117,10 +1148,10 @@ struct ext4_sb_info {
         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_freeclusters_counter;
         struct percpu_counter s_freeinodes_counter;
         struct percpu_counter s_dirs_counter;
-        struct percpu_counter s_dirtyblocks_counter;
+        struct percpu_counter s_dirtyclusters_counter;
         struct blockgroup_lock *s_blockgroup_lock;
         struct proc_dir_entry *s_proc;
         struct kobject s_kobj;
@@ -1136,10 +1167,6 @@ struct ext4_sb_info {
         u32 s_max_batch_time;
         u32 s_min_batch_time;
         struct block_device *journal_bdev;
-#ifdef CONFIG_JBD2_DEBUG
-        struct timer_list turn_ro_timer;        /* For turning read-only (crash simulation) */
-        wait_queue_head_t ro_wait_queue;        /* For people waiting for the fs to go read-only */
-#endif
 #ifdef CONFIG_QUOTA
         char *s_qf_names[MAXQUOTAS];            /* Names of quota files with journalled quota */
         int s_jquota_fmt;                       /* Format of quota to use */
@@ -1248,6 +1275,15 @@ static inline int ext4_valid_inum(struct super_block *sb, unsigned long ino)
                  ino <= le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count));
 }
 
+static inline void ext4_set_io_unwritten_flag(struct inode *inode,
+                                              struct ext4_io_end *io_end)
+{
+        if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
+                io_end->flag |= EXT4_IO_END_UNWRITTEN;
+                atomic_inc(&EXT4_I(inode)->i_aiodio_unwritten);
+        }
+}
+
 /*
  * Inode dynamic state flags
  */
@@ -1360,6 +1396,7 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK        0x0020
 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE      0x0040
 #define EXT4_FEATURE_RO_COMPAT_QUOTA            0x0100
+#define EXT4_FEATURE_RO_COMPAT_BIGALLOC         0x0200
 
 #define EXT4_FEATURE_INCOMPAT_COMPRESSION       0x0001
 #define EXT4_FEATURE_INCOMPAT_FILETYPE          0x0002
@@ -1402,7 +1439,8 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
                                          EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
                                          EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
                                          EXT4_FEATURE_RO_COMPAT_BTREE_DIR |\
-                                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+                                         EXT4_FEATURE_RO_COMPAT_HUGE_FILE |\
+                                         EXT4_FEATURE_RO_COMPAT_BIGALLOC)
 
 /*
  * Default values for user and/or group using reserved blocks
@@ -1735,9 +1773,9 @@ extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
                                          unsigned int flags,
                                          unsigned long *count,
                                          int *errp);
-extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
-                                  s64 nblocks, unsigned int flags);
-extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
+extern int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
+                                    s64 nclusters, unsigned int flags);
+extern ext4_fsblk_t ext4_count_free_clusters(struct super_block *);
 extern void ext4_check_blocks_bitmap(struct super_block *);
 extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
                                                     ext4_group_t block_group,
@@ -1745,12 +1783,18 @@ extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
 extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
 struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
                                       ext4_group_t block_group);
-extern unsigned ext4_init_block_bitmap(struct super_block *sb,
-                                       struct buffer_head *bh,
-                                       ext4_group_t group,
-                                       struct ext4_group_desc *desc);
-#define ext4_free_blocks_after_init(sb, group, desc)                    \
-                ext4_init_block_bitmap(sb, NULL, group, desc)
+extern void ext4_init_block_bitmap(struct super_block *sb,
+                                   struct buffer_head *bh,
+                                   ext4_group_t group,
+                                   struct ext4_group_desc *desc);
+extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
+                                              ext4_group_t block_group,
+                                              struct ext4_group_desc *gdp);
+extern unsigned ext4_num_base_meta_clusters(struct super_block *sb,
+                                            ext4_group_t block_group);
+extern unsigned ext4_num_overhead_clusters(struct super_block *sb,
+                                           ext4_group_t block_group,
+                                           struct ext4_group_desc *gdp);
 ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 
 /* dir.c */
@@ -1776,7 +1820,8 @@ extern int ext4fs_dirhash(const char *name, int len, struct
 
 /* ialloc.c */
 extern struct inode *ext4_new_inode(handle_t *, struct inode *, int,
-                                    const struct qstr *qstr, __u32 goal);
+                                    const struct qstr *qstr, __u32 goal,
+                                    uid_t *owner);
 extern void ext4_free_inode(handle_t *, struct inode *);
 extern struct inode * ext4_orphan_get(struct super_block *, unsigned long);
 extern unsigned long ext4_count_free_inodes(struct super_block *);
@@ -1839,6 +1884,12 @@ extern int ext4_block_truncate_page(handle_t *handle,
                 struct address_space *mapping, loff_t from);
 extern int ext4_block_zero_page_range(handle_t *handle,
                 struct address_space *mapping, loff_t from, loff_t length);
+extern int ext4_discard_partial_page_buffers(handle_t *handle,
+                struct address_space *mapping, loff_t from,
+                loff_t length, int flags);
+extern int ext4_discard_partial_page_buffers_no_lock(handle_t *handle,
+                struct inode *inode, struct page *page, loff_t from,
+                loff_t length, int flags);
 extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
 extern qsize_t *ext4_get_reserved_space(struct inode *inode);
 extern void ext4_da_update_reserve_space(struct inode *inode,
@@ -1927,8 +1978,8 @@ extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
                                       struct ext4_group_desc *bg);
 extern ext4_fsblk_t ext4_inode_table(struct super_block *sb,
                                      struct ext4_group_desc *bg);
-extern __u32 ext4_free_blks_count(struct super_block *sb,
-                                struct ext4_group_desc *bg);
+extern __u32 ext4_free_group_clusters(struct super_block *sb,
+                                      struct ext4_group_desc *bg);
 extern __u32 ext4_free_inodes_count(struct super_block *sb,
                                  struct ext4_group_desc *bg);
 extern __u32 ext4_used_dirs_count(struct super_block *sb,
@@ -1941,8 +1992,9 @@ extern void ext4_inode_bitmap_set(struct super_block *sb,
                                   struct ext4_group_desc *bg, ext4_fsblk_t blk);
 extern void ext4_inode_table_set(struct super_block *sb,
                                  struct ext4_group_desc *bg, ext4_fsblk_t blk);
-extern void ext4_free_blks_set(struct super_block *sb,
-                               struct ext4_group_desc *bg, __u32 count);
+extern void ext4_free_group_clusters_set(struct super_block *sb,
+                                         struct ext4_group_desc *bg,
+                                         __u32 count);
 extern void ext4_free_inodes_set(struct super_block *sb,
                                 struct ext4_group_desc *bg, __u32 count);
 extern void ext4_used_dirs_set(struct super_block *sb,
@@ -2051,13 +2103,13 @@ do {								\
 } while (0)
 
 #ifdef CONFIG_SMP
-/* Each CPU can accumulate percpu_counter_batch blocks in their local
- * counters. So we need to make sure we have free blocks more
+/* Each CPU can accumulate percpu_counter_batch clusters in their local
+ * counters. So we need to make sure we have free clusters more
  * than percpu_counter_batch  * nr_cpu_ids. Also add a window of 4 times.
  */
-#define EXT4_FREEBLOCKS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
+#define EXT4_FREECLUSTERS_WATERMARK (4 * (percpu_counter_batch * nr_cpu_ids))
 #else
-#define EXT4_FREEBLOCKS_WATERMARK 0
+#define EXT4_FREECLUSTERS_WATERMARK 0
 #endif
 
 static inline void ext4_update_i_disksize(struct inode *inode, loff_t newsize)
@@ -2243,10 +2295,19 @@ extern int ext4_multi_mount_protect(struct super_block *, ext4_fsblk_t);
 enum ext4_state_bits {
         BH_Uninit       /* blocks are allocated but uninitialized on disk */
           = BH_JBDPrivateStart,
+        BH_AllocFromCluster,    /* allocated blocks were part of already
+                                 * allocated cluster. Note that this flag will
+                                 * never, ever appear in a buffer_head's state
+                                 * flag. See EXT4_MAP_FROM_CLUSTER to see where
+                                 * this is used. */
+        BH_Da_Mapped,   /* Delayed allocated block that now has a mapping. This
+                         * flag is set when ext4_map_blocks is called on a
+                         * delayed allocated block to get its real mapping. */
 };
 
 BUFFER_FNS(Uninit, uninit)
 TAS_BUFFER_FNS(Uninit, uninit)
+BUFFER_FNS(Da_Mapped, da_mapped)
 
 /*
  * Add new method to test wether block and inode bitmaps are properly
@@ -2282,4 +2343,6 @@ extern void ext4_resize_end(struct super_block *sb);
 
 #endif  /* __KERNEL__ */
 
+#include "ext4_extents.h"
+
 #endif  /* _EXT4_H */