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authorFred Isaman <iisaman@citi.umich.edu>2011-07-30 20:52:51 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-07-31 12:18:17 -0400
commit90ace12ac42f65d1f077c5ef5ec2efafdcac338f (patch)
treeb68267bbb609498f1005c56fe957251d92e14d78 /fs/nfs/blocklayout/blocklayout.h
parent9f3770422c771da32c1d14e650c695eec27dbd1d (diff)
pnfsblock: encode_layoutcommit
In blocklayout driver. There are two things happening while layoutcommit/cleanup. 1. the modified extents are encoded. 2. On cleanup the extents are put back on the layout rw extents list, for reads. In the new system where actual xdr encoding is done in encode_layoutcommit() directly into xdr buffer, these are the new commit stages: 1. On setup_layoutcommit, the range is adjusted as before and a structure is allocated for communication with bl_encode_layoutcommit && bl_cleanup_layoutcommit (Generic layer provides a void-star to hang it on) 2. bl_encode_layoutcommit is called to do the actual encoding directly into xdr. The commit-extent-list is not freed and is stored on above structure. FIXME: The code is not yet converted to the new XDR cleanup 3. On cleanup the commit-extent-list is put back by a call to set_to_rw() as before, but with no need for XDR decoding of the list as before. And the commit-extent-list is freed. Finally allocated structure is freed. [rm inode and pnfs_layout_hdr args from cleanup_layoutcommit()] [pnfsblock: get rid of deprecated xdr macros] Signed-off-by: Jim Rees <rees@umich.edu> Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Fred Isaman <iisaman@citi.umich.edu> [blocklayout: encode_layoutcommit implementation] Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> [pnfsblock: fix bug setting up layoutcommit.] Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn> [pnfsblock: prevent commit list corruption] [pnfsblock: fix layoutcommit with an empty opaque] 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> 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.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h
index fcf47b55b5ce..3caaefce85a5 100644
--- a/fs/nfs/blocklayout/blocklayout.h
+++ b/fs/nfs/blocklayout/blocklayout.h
@@ -91,6 +91,15 @@ struct pnfs_block_extent {
struct pnfs_inval_markings *be_inval; /* tracks INVAL->RW transition */
};
+/* Shortened extent used by LAYOUTCOMMIT */
+struct pnfs_block_short_extent {
+ struct list_head bse_node;
+ struct nfs4_deviceid bse_devid;
+ struct block_device *bse_mdev;
+ sector_t bse_f_offset; /* the starting offset in the file */
+ sector_t bse_length; /* the size of the extent */
+};
+
static inline void
BL_INIT_INVAL_MARKS(struct pnfs_inval_markings *marks, sector_t blocksize)
{
@@ -184,6 +193,9 @@ int bl_mark_sectors_init(struct pnfs_inval_markings *marks,
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 encode_pnfs_block_layoutupdate(struct pnfs_block_layout *bl,
+ struct xdr_stream *xdr,
+ const struct nfs4_layoutcommit_args *arg);
int bl_add_merge_extent(struct pnfs_block_layout *bl,
struct pnfs_block_extent *new);