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| author | Tom Haynes <loghyr@primarydata.com> | 2014-12-11 17:02:04 -0500 |
|---|---|---|
| committer | Tom Haynes <loghyr@primarydata.com> | 2015-02-03 11:06:52 -0800 |
| commit | d67ae825a59d639e4d8b82413af84d854617a87e (patch) | |
| tree | 6b11fc9afb214e02b9cf0b66a14817c57f0f9a05 /fs/nfs/pnfs.c | |
| parent | 5fadeb47dcc5c30d4b6cf481b4a78689eab59443 (diff) | |
| download | op-kernel-dev-d67ae825a59d639e4d8b82413af84d854617a87e.zip op-kernel-dev-d67ae825a59d639e4d8b82413af84d854617a87e.tar.gz | |
pnfs/flexfiles: Add the FlexFile Layout Driver
The flexfile layout is a new layout that extends the
file layout. It is currently being drafted as a specification at
https://datatracker.ietf.org/doc/draft-ietf-nfsv4-layout-types/
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Tom Haynes <loghyr@primarydata.com>
Signed-off-by: Tao Peng <bergwolf@primarydata.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index c4c9fe6..0fb0f19 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -910,7 +910,9 @@ send_layoutget(struct pnfs_layout_hdr *lo, pnfs_layout_io_set_failed(lo, range->iomode); } return NULL; - } + } else + pnfs_layout_clear_fail_bit(lo, + pnfs_iomode_to_fail_bit(range->iomode)); return lseg; } @@ -930,6 +932,13 @@ static void pnfs_clear_layoutcommit(struct inode *inode, } } +void pnfs_clear_layoutreturn_waitbit(struct pnfs_layout_hdr *lo) +{ + clear_bit_unlock(NFS_LAYOUT_RETURN, &lo->plh_flags); + smp_mb__after_atomic(); + wake_up_bit(&lo->plh_flags, NFS_LAYOUT_RETURN); +} + static int pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, enum pnfs_iomode iomode, bool sync) @@ -943,6 +952,7 @@ pnfs_send_layoutreturn(struct pnfs_layout_hdr *lo, nfs4_stateid stateid, status = -ENOMEM; spin_lock(&ino->i_lock); lo->plh_block_lgets--; + pnfs_clear_layoutreturn_waitbit(lo); rpc_wake_up(&NFS_SERVER(ino)->roc_rpcwaitq); spin_unlock(&ino->i_lock); pnfs_put_layout_hdr(lo); @@ -1418,6 +1428,15 @@ static bool pnfs_prepare_to_retry_layoutget(struct pnfs_layout_hdr *lo) TASK_UNINTERRUPTIBLE); } +static void pnfs_clear_first_layoutget(struct pnfs_layout_hdr *lo) +{ + unsigned long *bitlock = &lo->plh_flags; + + clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); + smp_mb__after_atomic(); + wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); +} + /* * Layout segment is retreived from the server if not cached. * The appropriate layout segment is referenced and returned to the caller. @@ -1499,6 +1518,8 @@ lookup_again: spin_unlock(&ino->i_lock); dprintk("%s wait for layoutreturn\n", __func__); if (pnfs_prepare_to_retry_layoutget(lo)) { + if (first) + pnfs_clear_first_layoutget(lo); pnfs_put_layout_hdr(lo); dprintk("%s retrying\n", __func__); goto lookup_again; @@ -1533,13 +1554,8 @@ lookup_again: pnfs_clear_retry_layoutget(lo); atomic_dec(&lo->plh_outstanding); out_put_layout_hdr: - if (first) { - unsigned long *bitlock = &lo->plh_flags; - - clear_bit_unlock(NFS_LAYOUT_FIRST_LAYOUTGET, bitlock); - smp_mb__after_atomic(); - wake_up_bit(bitlock, NFS_LAYOUT_FIRST_LAYOUTGET); - } + if (first) + pnfs_clear_first_layoutget(lo); pnfs_put_layout_hdr(lo); out: dprintk("%s: inode %s/%llu pNFS layout segment %s for " |
