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| author | Fred Isaman <iisaman@netapp.com> | 2011-03-01 01:34:13 +0000 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 15:38:42 -0500 |
| commit | d684d2ae10a4f95d3035abf698d7d611ff2cd279 (patch) | |
| tree | 9bae2d1808b8e2a0d153d8d1d13f0d9a01408de0 /fs/nfs/pnfs.h | |
| parent | 94de8b27d0dcb2608d56a7e5c2941b87e6da7ce3 (diff) | |
| download | linux-d684d2ae10a4f95d3035abf698d7d611ff2cd279.tar.gz linux-d684d2ae10a4f95d3035abf698d7d611ff2cd279.tar.bz2 linux-d684d2ae10a4f95d3035abf698d7d611ff2cd279.zip | |
NFSv4.1: lseg refcounting
Prepare put_lseg and get_lseg to be called from the pNFS I/O code.
Pull common code from pnfs_lseg_locked to call from pnfs_lseg.
Inline pnfs_lseg_locked into it's only caller.
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
| -rw-r--r-- | fs/nfs/pnfs.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index e2612ea0cbed..9a994bc9899f 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -177,6 +177,16 @@ static inline int lo_fail_bit(u32 iomode) NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED; } +static inline struct pnfs_layout_segment * +get_lseg(struct pnfs_layout_segment *lseg) +{ + if (lseg) { + atomic_inc(&lseg->pls_refcount); + smp_mb__after_atomic_inc(); + } + return lseg; +} + /* Return true if a layout driver is being used for this mountpoint */ static inline int pnfs_enabled_sb(struct nfs_server *nfss) { @@ -194,6 +204,16 @@ static inline void pnfs_destroy_layout(struct nfs_inode *nfsi) } static inline struct pnfs_layout_segment * +get_lseg(struct pnfs_layout_segment *lseg) +{ + return NULL; +} + +static inline void put_lseg(struct pnfs_layout_segment *lseg) +{ +} + +static inline struct pnfs_layout_segment * pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, enum pnfs_iomode access_type) { |