xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pnfs/flexfiles: Add the FlexFile Layout Driver

Browse Source 
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>
This commit is contained in:
Tom Haynes
2014-12-11 17:02:04 -05:00
parent 5fadeb47dc
commit d67ae825a5
13 changed files with 2325 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
fs/nfs/pnfs.c
View File

@@ -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 "