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pnfsblock: add extent manipulation functions

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Adds working implementations of various support functions
to handle INVAL extents, needed by writes, such as
bl_mark_sectors_init and bl_is_sector_init.

[pnfsblock: fix 64-bit compiler warnings for extent manipulation]
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
[Implement release_inval_marks]
Signed-off-by: Zhang Jingwang <zhangjingwang@nrchpc.ac.cn>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Fred Isaman
2011-07-30 20:52:49 -04:00
committed by Trond Myklebust
parent 6d742ba538
commit c1c2a4cd35
3 changed files with 287 additions and 3 deletions
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30
fs/nfs/blocklayout/blocklayout.h
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@@ -38,6 +38,9 @@
#include "../pnfs.h"
#define PAGE_CACHE_SECTORS (PAGE_CACHE_SIZE >> SECTOR_SHIFT)
#define PAGE_CACHE_SECTOR_SHIFT (PAGE_CACHE_SHIFT - SECTOR_SHIFT)
struct block_mount_id {
spinlock_t bm_lock; /* protects list */
struct list_head bm_devlist; /* holds pnfs_block_dev */
@@ -56,8 +59,23 @@ enum exstate4 {
PNFS_BLOCK_NONE_DATA = 3 /* unmapped, it's a hole */
};
#define MY_MAX_TAGS (15) /* tag bitnums used must be less than this */
struct my_tree {
sector_t mtt_step_size; /* Internal sector alignment */
struct list_head mtt_stub; /* Should be a radix tree */
};
struct pnfs_inval_markings {
/* STUB */
spinlock_t im_lock;
struct my_tree im_tree; /* Sectors that need LAYOUTCOMMIT */
sector_t im_block_size; /* Server blocksize in sectors */
};
struct pnfs_inval_tracking {
struct list_head it_link;
int it_sector;
int it_tags;
};
/* sector_t fields are all in 512-byte sectors */
@@ -76,7 +94,11 @@ struct pnfs_block_extent {
static inline void
BL_INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize)
{
/* STUB */
spin_lock_init(&marks->im_lock);
INIT_LIST_HEAD(&marks->im_tree.mtt_stub);
marks->im_block_size = blocksize;
marks->im_tree.mtt_step_size = min((sector_t)PAGE_CACHE_SECTORS,
blocksize);
}
enum extentclass4 {
@@ -156,8 +178,12 @@ void bl_free_block_dev(struct pnfs_block_dev *bdev);
struct pnfs_block_extent *
bl_find_get_extent(struct pnfs_block_layout *bl, sector_t isect,
struct pnfs_block_extent **cow_read);
int bl_mark_sectors_init(struct pnfs_inval_markings *marks,
sector_t offset, sector_t length,
sector_t **pages);
void bl_put_extent(struct pnfs_block_extent *be);
struct pnfs_block_extent *bl_alloc_extent(void);
int bl_is_sector_init(struct pnfs_inval_markings *marks, sector_t isect);
int bl_add_merge_extent(struct pnfs_block_layout *bl,
struct pnfs_block_extent *new);