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linux-davinci-2.6.23
Commit e56e0b78 authored by Trond Myklebust's avatar Trond Myklebust
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NFSv4: Allocate OPEN call RPC arguments using kmalloc() 

 Cleanup in preparation for making OPEN calls interruptible by the user.
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 06f814a3
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Showing with 117 additions and 96 deletions
fs/nfs/nfs4proc.c
View file @ e56e0b78
......@@ -194,6 +194,76 @@ static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinf
spin_unlock(&inode->i_lock);
}
struct nfs4_opendata {
struct nfs_openargs o_arg;
struct nfs_openres o_res;
struct nfs_fattr f_attr;
struct nfs_fattr dir_attr;
struct dentry *dentry;
struct dentry *dir;
struct nfs4_state_owner *owner;
struct iattr attrs;
};
static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
struct nfs4_state_owner *sp, int flags,
const struct iattr *attrs)
{
struct dentry *parent = dget_parent(dentry);
struct inode *dir = parent->d_inode;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs4_opendata *p;
p = kzalloc(sizeof(*p), GFP_KERNEL);
if (p == NULL)
goto err;
p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
if (p->o_arg.seqid == NULL)
goto err_free;
p->dentry = dget(dentry);
p->dir = parent;
p->owner = sp;
atomic_inc(&sp->so_count);
p->o_arg.fh = NFS_FH(dir);
p->o_arg.open_flags = flags,
p->o_arg.clientid = server->nfs4_state->cl_clientid;
p->o_arg.id = sp->so_id;
p->o_arg.name = &dentry->d_name;
p->o_arg.server = server;
p->o_arg.bitmask = server->attr_bitmask;
p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
p->o_res.f_attr = &p->f_attr;
p->o_res.dir_attr = &p->dir_attr;
p->o_res.server = server;
nfs_fattr_init(&p->f_attr);
nfs_fattr_init(&p->dir_attr);
if (flags & O_EXCL) {
u32 *s = (u32 *) p->o_arg.u.verifier.data;
s[0] = jiffies;
s[1] = current->pid;
} else if (flags & O_CREAT) {
p->o_arg.u.attrs = &p->attrs;
memcpy(&p->attrs, attrs, sizeof(p->attrs));
}
return p;
err_free:
kfree(p);
err:
dput(parent);
return NULL;
}
static void nfs4_opendata_free(struct nfs4_opendata *p)
{
if (p != NULL) {
nfs_free_seqid(p->o_arg.seqid);
nfs4_put_state_owner(p->owner);
dput(p->dir);
dput(p->dentry);
kfree(p);
}
}
/* Helper for asynchronous RPC calls */
static int nfs4_call_async(struct rpc_clnt *clnt,
const struct rpc_call_ops *tk_ops, void *calldata)
......@@ -314,57 +384,45 @@ static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state
struct nfs4_state_owner *sp = state->owner;
struct inode *inode = dentry->d_inode;
struct nfs_server *server = NFS_SERVER(inode);
struct dentry *parent = dget_parent(dentry);
struct nfs_openargs arg = {
.fh = NFS_FH(parent->d_inode),
.clientid = server->nfs4_state->cl_clientid,
.name = &dentry->d_name,
.id = sp->so_id,
.server = server,
.bitmask = server->attr_bitmask,
.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
};
struct nfs_openres res = {
.server = server,
};
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
.rpc_argp = &arg,
.rpc_resp = &res,
.rpc_cred = sp->so_cred,
};
struct nfs4_opendata *opendata;
int status = 0;
if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
goto out;
if (state->state == 0)
goto out;
arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
opendata = nfs4_opendata_alloc(dentry, sp, state->state, NULL);
status = -ENOMEM;
if (arg.seqid == NULL)
if (opendata == NULL)
goto out;
arg.open_flags = state->state;
memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
msg.rpc_argp = &opendata->o_arg;
msg.rpc_resp = &opendata->o_res;
memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
sizeof(opendata->o_arg.u.delegation.data));
status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
nfs_increment_open_seqid(status, arg.seqid);
nfs_increment_open_seqid(status, opendata->o_arg.seqid);
if (status != 0)
goto out_free;
if(res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
if(opendata->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
status = _nfs4_proc_open_confirm(server->client, NFS_FH(inode),
sp, &res.stateid, arg.seqid);
sp, &opendata->o_res.stateid, opendata->o_arg.seqid);
if (status != 0)
goto out_free;
}
nfs_confirm_seqid(&sp->so_seqid, 0);
if (status >= 0) {
memcpy(state->stateid.data, res.stateid.data,
memcpy(state->stateid.data, opendata->o_res.stateid.data,
sizeof(state->stateid.data));
clear_bit(NFS_DELEGATED_STATE, &state->flags);
}
out_free:
nfs_free_seqid(arg.seqid);
nfs4_opendata_free(opendata);
out:
dput(parent);
return status;
}
......@@ -506,21 +564,8 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
struct dentry *parent = dget_parent(dentry);
struct inode *dir = parent->d_inode;
struct inode *inode = state->inode;
struct nfs_server *server = NFS_SERVER(dir);
struct nfs_delegation *delegation = NFS_I(inode)->delegation;
struct nfs_fattr f_attr, dir_attr;
struct nfs_openargs o_arg = {
.fh = NFS_FH(dir),
.open_flags = state->state,
.name = &dentry->d_name,
.bitmask = server->attr_bitmask,
.claim = NFS4_OPEN_CLAIM_NULL,
};
struct nfs_openres o_res = {
.f_attr = &f_attr,
.dir_attr = &dir_attr,
.server = server,
};
struct nfs4_opendata *opendata;
int status = 0;
if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
......@@ -531,38 +576,38 @@ static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
set_bit(NFS_DELEGATED_STATE, &state->flags);
goto out;
}
o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
status = -ENOMEM;
if (o_arg.seqid == NULL)
opendata = nfs4_opendata_alloc(dentry, sp, state->state, NULL);
if (opendata == NULL)
goto out;
nfs_fattr_init(&f_attr);
nfs_fattr_init(&dir_attr);
status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
status = _nfs4_proc_open(dir, sp, &opendata->o_arg, &opendata->o_res);
if (status != 0)
goto out_nodeleg;
/* Check if files differ */
if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
if ((opendata->f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
goto out_stale;
/* Has the file handle changed? */
if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
if (nfs_compare_fh(&opendata->o_res.fh, NFS_FH(inode)) != 0) {
/* Verify if the change attributes are the same */
if (f_attr.change_attr != NFS_I(inode)->change_attr)
if (opendata->f_attr.change_attr != NFS_I(inode)->change_attr)
goto out_stale;
if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
if (nfs_size_to_loff_t(opendata->f_attr.size) != inode->i_size)
goto out_stale;
/* Lets just pretend that this is the same file */
nfs_copy_fh(NFS_FH(inode), &o_res.fh);
NFS_I(inode)->fileid = f_attr.fileid;
nfs_copy_fh(NFS_FH(inode), &opendata->o_res.fh);
NFS_I(inode)->fileid = opendata->f_attr.fileid;
}
memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
if (o_res.delegation_type != 0) {
memcpy(&state->stateid, &opendata->o_res.stateid, sizeof(state->stateid));
if (opendata->o_res.delegation_type != 0) {
if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
nfs_inode_set_delegation(inode, sp->so_cred,
&opendata->o_res);
else
nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
nfs_inode_reclaim_delegation(inode, sp->so_cred,
&opendata->o_res);
}
out_nodeleg:
nfs_free_seqid(o_arg.seqid);
nfs4_opendata_free(opendata);
clear_bit(NFS_DELEGATED_STATE, &state->flags);
out:
dput(parent);
......@@ -706,21 +751,8 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
struct nfs_server *server = NFS_SERVER(dir);
struct nfs4_client *clp = server->nfs4_state;
struct inode *inode = NULL;
struct nfs4_opendata *opendata;
int status;
struct nfs_fattr f_attr, dir_attr;
struct nfs_openargs o_arg = {
.fh = NFS_FH(dir),
.open_flags = flags,
.name = &dentry->d_name,
.server = server,
.bitmask = server->attr_bitmask,
.claim = NFS4_OPEN_CLAIM_NULL,
};
struct nfs_openres o_res = {
.f_attr = &f_attr,
.dir_attr = &dir_attr,
.server = server,
};
/* Protect against reboot recovery conflicts */
down_read(&clp->cl_sem);
......@@ -729,45 +761,34 @@ static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, st
dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
goto out_err;
}
if (flags & O_EXCL) {
u32 *p = (u32 *) o_arg.u.verifier.data;
p[0] = jiffies;
p[1] = current->pid;
} else
o_arg.u.attrs = sattr;
/* Serialization for the sequence id */
opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
if (opendata == NULL)
goto err_put_state_owner;
o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
if (o_arg.seqid == NULL)
return -ENOMEM;
nfs_fattr_init(&f_attr);
nfs_fattr_init(&dir_attr);
status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
status = _nfs4_proc_open(dir, sp, &opendata->o_arg, &opendata->o_res);
if (status != 0)
goto out_err;
goto err_opendata_free;
status = -ENOMEM;
inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
inode = nfs_fhget(dir->i_sb, &opendata->o_res.fh, &opendata->f_attr);
if (!inode)
goto out_err;
goto err_opendata_free;
state = nfs4_get_open_state(inode, sp);
if (!state)
goto out_err;
update_open_stateid(state, &o_res.stateid, flags);
if (o_res.delegation_type != 0)
nfs_inode_set_delegation(inode, cred, &o_res);
nfs_free_seqid(o_arg.seqid);
goto err_opendata_free;
update_open_stateid(state, &opendata->o_res.stateid, flags);
if (opendata->o_res.delegation_type != 0)
nfs_inode_set_delegation(inode, cred, &opendata->o_res);
nfs4_opendata_free(opendata);
nfs4_put_state_owner(sp);
up_read(&clp->cl_sem);
*res = state;
return 0;
err_opendata_free:
nfs4_opendata_free(opendata);
err_put_state_owner:
nfs4_put_state_owner(sp);
out_err:
if (sp != NULL) {
if (state != NULL)
nfs4_put_open_state(state);
nfs_free_seqid(o_arg.seqid);
nfs4_put_state_owner(sp);
}
/* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
up_read(&clp->cl_sem);
if (inode != NULL)
......
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