On Sat, Apr 11, 2009 at 03:46:07PM -0400, Theodore Ts'o wrote:
.....
......
> diff --git a/include/linux/ext4_trace_types.h b/include/linux/ext4_trace_types.h
> new file mode 100644
> index 0000000..229a2dd
> --- /dev/null
> +++ b/include/linux/ext4_trace_types.h
> @@ -0,0 +1,108 @@
> +/*
> + * ext4_trace_types.h -- these data structures are needed by the
> + * tracing infrastructure
> + */
> +
> +#ifndef _EXT4_TRACE_TYPES_H
> +#define _EXT4_TRACE_TYPES_H
> +
> +/* data type for block offset of block group */
> +typedef int ext4_grpblk_t;
> +
> +/* data type for filesystem-wide blocks number */
> +typedef unsigned long long ext4_fsblk_t;
> +
> +/* data type for file logical block number */
> +typedef __u32 ext4_lblk_t;
> +
> +/* data type for block group number */
> +typedef unsigned int ext4_group_t;
> +
> +struct ext4_allocation_request {
> + /* target inode for block we're allocating */
> + struct inode *inode;
> + /* logical block in target inode */
> + ext4_lblk_t logical;
> + /* phys. target (a hint) */
> + ext4_fsblk_t goal;
> + /* the closest logical allocated block to the left */
> + ext4_lblk_t lleft;
> + /* phys. block for ^^^ */
> + ext4_fsblk_t pleft;
> + /* the closest logical allocated block to the right */
> + ext4_lblk_t lright;
> + /* phys. block for ^^^ */
> + ext4_fsblk_t pright;
> + /* how many blocks we want to allocate */
> + unsigned int len;
> + /* flags. see above EXT4_MB_HINT_* */
> + unsigned int flags;
> +};
> +
> +struct ext4_free_extent {
> + ext4_lblk_t fe_logical;
> + ext4_grpblk_t fe_start;
> + ext4_group_t fe_group;
> + int fe_len;
> +};
> +
> +struct ext4_allocation_context {
> + struct inode *ac_inode;
> + struct super_block *ac_sb;
> +
> + /* original request */
> + struct ext4_free_extent ac_o_ex;
> +
> + /* goal request (after normalization) */
> + struct ext4_free_extent ac_g_ex;
> +
> + /* the best found extent */
> + struct ext4_free_extent ac_b_ex;
> +
> + /* copy of the bext found extent taken before preallocation efforts */
> + struct ext4_free_extent ac_f_ex;
> +
> + /* number of iterations done. we have to track to limit searching */
> + unsigned long ac_ex_scanned;
> + __u16 ac_groups_scanned;
> + __u16 ac_found;
> + __u16 ac_tail;
> + __u16 ac_buddy;
> + __u16 ac_flags; /* allocation hints */
> + __u8 ac_status;
> + __u8 ac_criteria;
> + __u8 ac_repeats;
> + __u8 ac_2order; /* if request is to allocate 2^N blocks and
> + * N > 0, the field stores N, otherwise 0 */
> + __u8 ac_op; /* operation, for history only */
> + struct page *ac_bitmap_page;
> + struct page *ac_buddy_page;
> + /*
> + * pointer to the held semaphore upon successful
> + * block allocation
> + */
> + struct rw_semaphore *alloc_semp;
> + struct ext4_prealloc_space *ac_pa;
> + struct ext4_locality_group *ac_lg;
> +};
> +
> +struct ext4_prealloc_space {
> + struct list_head pa_inode_list;
> + struct list_head pa_group_list;
> + union {
> + struct list_head pa_tmp_list;
> + struct rcu_head pa_rcu;
> + } u;
> + spinlock_t pa_lock;
> + atomic_t pa_count;
> + unsigned pa_deleted;
> + ext4_fsblk_t pa_pstart; /* phys. block */
> + ext4_lblk_t pa_lstart; /* log. block */
> + unsigned short pa_len; /* len of preallocated chunk */
> + unsigned short pa_free; /* how many blocks are free */
> + unsigned short pa_type; /* pa type. inode or group */
> + spinlock_t *pa_obj_lock;
> + struct inode *pa_inode; /* hack, for history only */
> +};
> +
> +#endif /* _EXT4_TRACE_TYPES_H */
We moved all the ext4 headers to fs/ext4/ Can this be
fs/ext4/ext4_trace_types.h ?
-aneesh
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