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NFSv4.1 pnfs_layoutcommit_inode fixes

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Test NFS_INO_LAYOUTCOMMIT before kzalloc
Mark inode dirty to retry LAYOUTCOMMIT on kzalloc failure.
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Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Andy Adamson 2011-03-12 02:58:09 -05:00 committed by Trond Myklebust
parent cccb4d063b
commit de4b15c7e9
1 changed files with 19 additions and 11 deletions
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30
fs/nfs/pnfs.c
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@ -982,6 +982,14 @@ pnfs_set_layoutcommit(struct nfs_write_data *wdata)
}
EXPORT_SYMBOL_GPL(pnfs_set_layoutcommit);
/*
* For the LAYOUT4_NFSV4_1_FILES layout type, NFS_DATA_SYNC WRITEs and
* NFS_UNSTABLE WRITEs with a COMMIT to data servers must store enough
* data to disk to allow the server to recover the data if it crashes.
* LAYOUTCOMMIT is only needed when the NFL4_UFLG_COMMIT_THRU_MDS flag
* is off, and a COMMIT is sent to a data server, or
* if WRITEs to a data server return NFS_DATA_SYNC.
*/
int
pnfs_layoutcommit_inode(struct inode *inode, int sync)
{
@ -994,10 +1002,18 @@ pnfs_layoutcommit_inode(struct inode *inode, int sync)
dprintk("--> %s inode %lu\n", __func__, inode->i_ino);
if (!test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags))
return 0;
/* Note kzalloc ensures data->res.seq_res.sr_slot == NULL */
data = kzalloc(sizeof(*data), GFP_NOFS);
spin_lock(&inode->i_lock);
if (!data) {
mark_inode_dirty_sync(inode);
status = -ENOMEM;
goto out;
}
spin_lock(&inode->i_lock);
if (!test_and_clear_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) {
spin_unlock(&inode->i_lock);
kfree(data);
@ -1014,16 +1030,8 @@ pnfs_layoutcommit_inode(struct inode *inode, int sync)
lseg->pls_end_pos = 0;
lseg->pls_lc_cred = NULL;
if (!data) {
put_lseg(lseg);
spin_unlock(&inode->i_lock);
put_rpccred(cred);
status = -ENOMEM;
goto out;
} else {
memcpy(&data->args.stateid.data, nfsi->layout->plh_stateid.data,
sizeof(nfsi->layout->plh_stateid.data));
}
memcpy(&data->args.stateid.data, nfsi->layout->plh_stateid.data,
sizeof(nfsi->layout->plh_stateid.data));
spin_unlock(&inode->i_lock);
data->args.inode = inode;