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| author | Fred Isaman <iisaman@citi.umich.edu> | 2011-07-30 20:52:49 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-07-31 12:18:17 -0400 |
| commit | c1c2a4cd352269f1fb585b4a5c63abe24dd946c6 (patch) | |
| tree | 0fc7470702b0fc3e7d156ac49285ec58de797fa3 /fs/nfs/blocklayout/blocklayout.h | |
| parent | 6d742ba538f98164f3c5e05cdcadb4ec6ddf504f (diff) | |
| download | linux-c1c2a4cd352269f1fb585b4a5c63abe24dd946c6.tar.gz linux-c1c2a4cd352269f1fb585b4a5c63abe24dd946c6.tar.bz2 linux-c1c2a4cd352269f1fb585b4a5c63abe24dd946c6.zip | |
pnfsblock: add extent manipulation functions
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>
Diffstat (limited to 'fs/nfs/blocklayout/blocklayout.h')
| -rw-r--r-- | fs/nfs/blocklayout/blocklayout.h | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h index 3e1b5fc152d7..fcf47b55b5ce 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h @@ -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); |