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NFSv4: Return NFS4ERR_DELAY when a layout recall fails due to igrab()

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Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2018-06-07 14:31:25 -04:00
parent 6c34265502
commit ce5624f7e6
1 changed files with 14 additions and 12 deletions
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26
fs/nfs/callback_proc.c
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@ -128,7 +128,6 @@ static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp,
struct inode *inode;
struct pnfs_layout_hdr *lo;
restart:
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
list_for_each_entry(lo, &server->layouts, plh_layouts) {
if (stateid != NULL &&
@ -136,20 +135,20 @@ restart:
continue;
inode = igrab(lo->plh_inode);
if (!inode)
continue;
return ERR_PTR(-EAGAIN);
if (!nfs_sb_active(inode->i_sb)) {
rcu_read_unlock();
spin_unlock(&clp->cl_lock);
iput(inode);
spin_lock(&clp->cl_lock);
rcu_read_lock();
goto restart;
return ERR_PTR(-EAGAIN);
}
return inode;
}
}
return NULL;
return ERR_PTR(-ENOENT);
}
/*
@ -166,7 +165,6 @@ static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp,
struct inode *inode;
struct pnfs_layout_hdr *lo;
restart:
list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
list_for_each_entry(lo, &server->layouts, plh_layouts) {
nfsi = NFS_I(lo->plh_inode);
@ -176,20 +174,20 @@ restart:
continue;
inode = igrab(lo->plh_inode);
if (!inode)
continue;
return ERR_PTR(-EAGAIN);
if (!nfs_sb_active(inode->i_sb)) {
rcu_read_unlock();
spin_unlock(&clp->cl_lock);
iput(inode);
spin_lock(&clp->cl_lock);
rcu_read_lock();
goto restart;
return ERR_PTR(-EAGAIN);
}
return inode;
}
}
return NULL;
return ERR_PTR(-ENOENT);
}
static struct inode *nfs_layout_find_inode(struct nfs_client *clp,
@ -201,7 +199,7 @@ static struct inode *nfs_layout_find_inode(struct nfs_client *clp,
spin_lock(&clp->cl_lock);
rcu_read_lock();
inode = nfs_layout_find_inode_by_stateid(clp, stateid);
if (!inode)
if (inode == ERR_PTR(-ENOENT))
inode = nfs_layout_find_inode_by_fh(clp, fh);
rcu_read_unlock();
spin_unlock(&clp->cl_lock);
@ -256,8 +254,11 @@ static u32 initiate_file_draining(struct nfs_client *clp,
LIST_HEAD(free_me_list);
ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid);
if (!ino)
goto out;
if (IS_ERR(ino)) {
if (ino == ERR_PTR(-EAGAIN))
rv = NFS4ERR_DELAY;
goto out_noput;
}
pnfs_layoutcommit_inode(ino, false);
@ -303,9 +304,10 @@ unlock:
nfs_commit_inode(ino, 0);
pnfs_put_layout_hdr(lo);
out:
nfs_iput_and_deactive(ino);
out_noput:
trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino,
&args->cbl_stateid, -rv);
nfs_iput_and_deactive(ino);
return rv;
}