return no_root_error;
}
+static void nfs_init_timeout_values(struct rpc_timeout *to, int proto, unsigned int timeo, unsigned int retrans)
+{
+ to->to_initval = timeo * HZ / 10;
+ to->to_retries = retrans;
+ if (!to->to_retries)
+ to->to_retries = 2;
+
+ switch (proto) {
+ case IPPROTO_TCP:
+ if (!to->to_initval)
+ to->to_initval = 60 * HZ;
+ if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
+ to->to_initval = NFS_MAX_TCP_TIMEOUT;
+ to->to_increment = to->to_initval;
+ to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
+ to->to_exponential = 0;
+ break;
+ case IPPROTO_UDP:
+ default:
+ if (!to->to_initval)
+ to->to_initval = 11 * HZ / 10;
+ if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
+ to->to_initval = NFS_MAX_UDP_TIMEOUT;
+ to->to_maxval = NFS_MAX_UDP_TIMEOUT;
+ to->to_exponential = 1;
+ break;
+ }
+}
+
/*
* Create an RPC client handle.
*/
struct rpc_timeout timeparms;
struct rpc_xprt *xprt = NULL;
struct rpc_clnt *clnt = NULL;
- int tcp = (data->flags & NFS_MOUNT_TCP);
+ int proto = (data->flags & NFS_MOUNT_TCP) ? IPPROTO_TCP : IPPROTO_UDP;
- /* Initialize timeout values */
- timeparms.to_initval = data->timeo * HZ / 10;
- timeparms.to_retries = data->retrans;
- timeparms.to_maxval = tcp ? RPC_MAX_TCP_TIMEOUT : RPC_MAX_UDP_TIMEOUT;
- timeparms.to_exponential = 1;
-
- if (!timeparms.to_initval)
- timeparms.to_initval = (tcp ? 600 : 11) * HZ / 10;
- if (!timeparms.to_retries)
- timeparms.to_retries = 5;
+ nfs_init_timeout_values(&timeparms, proto, data->timeo, data->retrans);
/* create transport and client */
- xprt = xprt_create_proto(tcp ? IPPROTO_TCP : IPPROTO_UDP,
- &server->addr, &timeparms);
+ xprt = xprt_create_proto(proto, &server->addr, &timeparms);
if (IS_ERR(xprt)) {
dprintk("%s: cannot create RPC transport. Error = %ld\n",
__FUNCTION__, PTR_ERR(xprt));
{ NFS_MOUNT_SOFT, ",soft", ",hard" },
{ NFS_MOUNT_INTR, ",intr", "" },
{ NFS_MOUNT_POSIX, ",posix", "" },
- { NFS_MOUNT_TCP, ",tcp", ",udp" },
{ NFS_MOUNT_NOCTO, ",nocto", "" },
{ NFS_MOUNT_NOAC, ",noac", "" },
{ NFS_MOUNT_NONLM, ",nolock", ",lock" },
};
struct proc_nfs_info *nfs_infop;
struct nfs_server *nfss = NFS_SB(mnt->mnt_sb);
+ char buf[12];
+ char *proto;
seq_printf(m, ",v%d", nfss->rpc_ops->version);
seq_printf(m, ",rsize=%d", nfss->rsize);
else
seq_puts(m, nfs_infop->nostr);
}
+ switch (nfss->client->cl_xprt->prot) {
+ case IPPROTO_TCP:
+ proto = "tcp";
+ break;
+ case IPPROTO_UDP:
+ proto = "udp";
+ break;
+ default:
+ snprintf(buf, sizeof(buf), "%u", nfss->client->cl_xprt->prot);
+ proto = buf;
+ }
+ seq_printf(m, ",proto=%s", proto);
seq_puts(m, ",addr=");
seq_escape(m, nfss->hostname, " \t\n\\");
return 0;
else
init_special_inode(inode, inode->i_mode, fattr->rdev);
- nfsi->read_cache_jiffies = fattr->timestamp;
+ nfsi->read_cache_jiffies = fattr->time_start;
+ nfsi->last_updated = jiffies;
inode->i_atime = fattr->atime;
inode->i_mtime = fattr->mtime;
inode->i_ctime = fattr->ctime;
filemap_fdatawait(inode->i_mapping);
nfs_wb_all(inode);
}
+ /*
+ * Return any delegations if we're going to change ACLs
+ */
+ if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
+ nfs_inode_return_delegation(inode);
error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
if (error == 0)
nfs_refresh_inode(inode, &fattr);
spin_unlock(&inode->i_lock);
}
-struct nfs_open_context *nfs_find_open_context(struct inode *inode, int mode)
+/*
+ * Given an inode, search for an open context with the desired characteristics
+ */
+struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode)
{
struct nfs_inode *nfsi = NFS_I(inode);
struct nfs_open_context *pos, *ctx = NULL;
spin_lock(&inode->i_lock);
list_for_each_entry(pos, &nfsi->open_files, list) {
+ if (cred != NULL && pos->cred != cred)
+ continue;
if ((pos->mode & mode) == mode) {
ctx = get_nfs_open_context(pos);
break;
ctx->mode = filp->f_mode;
nfs_file_set_open_context(filp, ctx);
put_nfs_open_context(ctx);
- if ((filp->f_mode & FMODE_WRITE) != 0)
- nfs_begin_data_update(inode);
return 0;
}
int nfs_release(struct inode *inode, struct file *filp)
{
- if ((filp->f_mode & FMODE_WRITE) != 0)
- nfs_end_data_update(inode);
nfs_file_clear_open_context(filp);
return 0;
}
goto out;
}
+ spin_lock(&inode->i_lock);
status = nfs_update_inode(inode, &fattr, verifier);
if (status) {
+ spin_unlock(&inode->i_lock);
dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
inode->i_sb->s_id,
(long long)NFS_FILEID(inode), status);
goto out;
}
- spin_lock(&inode->i_lock);
cache_validity = nfsi->cache_validity;
nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
* We may need to keep the attributes marked as invalid if
* we raced with nfs_end_attr_update().
*/
- if (verifier == nfsi->cache_change_attribute)
+ if (time_after_eq(verifier, nfsi->cache_change_attribute))
nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
spin_unlock(&inode->i_lock);
if (S_ISDIR(inode->i_mode)) {
memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
/* This ensures we revalidate child dentries */
- nfsi->cache_change_attribute++;
+ nfsi->cache_change_attribute = jiffies;
}
spin_unlock(&inode->i_lock);
struct nfs_inode *nfsi = NFS_I(inode);
if (!nfs_have_delegation(inode, FMODE_READ)) {
- /* Mark the attribute cache for revalidation */
- spin_lock(&inode->i_lock);
- nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
- /* Directories and symlinks: invalidate page cache too */
- if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
+ /* Directories and symlinks: invalidate page cache */
+ if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) {
+ spin_lock(&inode->i_lock);
nfsi->cache_validity |= NFS_INO_INVALID_DATA;
- spin_unlock(&inode->i_lock);
+ spin_unlock(&inode->i_lock);
+ }
}
- nfsi->cache_change_attribute ++;
+ nfsi->cache_change_attribute = jiffies;
atomic_dec(&nfsi->data_updates);
}
/**
- * nfs_refresh_inode - verify consistency of the inode attribute cache
+ * nfs_check_inode_attributes - verify consistency of the inode attribute cache
* @inode - pointer to inode
* @fattr - updated attributes
*
* so that fattr carries weak cache consistency data, then it may
* also update the ctime/mtime/change_attribute.
*/
-int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
+static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
{
struct nfs_inode *nfsi = NFS_I(inode);
loff_t cur_size, new_isize;
int data_unstable;
- spin_lock(&inode->i_lock);
/* Are we in the process of updating data on the server? */
data_unstable = nfs_caches_unstable(inode);
}
if ((fattr->valid & NFS_ATTR_FATTR) == 0) {
- spin_unlock(&inode->i_lock);
return 0;
}
/* Has the inode gone and changed behind our back? */
if (nfsi->fileid != fattr->fileid
|| (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
- spin_unlock(&inode->i_lock);
return -EIO;
}
if (!timespec_equal(&inode->i_atime, &fattr->atime))
nfsi->cache_validity |= NFS_INO_INVALID_ATIME;
- nfsi->read_cache_jiffies = fattr->timestamp;
- spin_unlock(&inode->i_lock);
+ nfsi->read_cache_jiffies = fattr->time_start;
return 0;
}
+/**
+ * nfs_refresh_inode - try to update the inode attribute cache
+ * @inode - pointer to inode
+ * @fattr - updated attributes
+ *
+ * Check that an RPC call that returned attributes has not overlapped with
+ * other recent updates of the inode metadata, then decide whether it is
+ * safe to do a full update of the inode attributes, or whether just to
+ * call nfs_check_inode_attributes.
+ */
+int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ int status;
+
+ if ((fattr->valid & NFS_ATTR_FATTR) == 0)
+ return 0;
+ spin_lock(&inode->i_lock);
+ nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
+ if (nfs_verify_change_attribute(inode, fattr->time_start))
+ nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME);
+ if (time_after(fattr->time_start, nfsi->last_updated))
+ status = nfs_update_inode(inode, fattr, fattr->time_start);
+ else
+ status = nfs_check_inode_attributes(inode, fattr);
+
+ spin_unlock(&inode->i_lock);
+ return status;
+}
+
+/**
+ * nfs_post_op_update_inode - try to update the inode attribute cache
+ * @inode - pointer to inode
+ * @fattr - updated attributes
+ *
+ * After an operation that has changed the inode metadata, mark the
+ * attribute cache as being invalid, then try to update it.
+ */
+int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
+{
+ struct nfs_inode *nfsi = NFS_I(inode);
+ int status = 0;
+
+ spin_lock(&inode->i_lock);
+ if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) {
+ nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS;
+ goto out;
+ }
+ status = nfs_update_inode(inode, fattr, fattr->time_start);
+ if (time_after_eq(fattr->time_start, nfsi->cache_change_attribute))
+ nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE);
+ nfsi->cache_change_attribute = jiffies;
+out:
+ spin_unlock(&inode->i_lock);
+ return status;
+}
+
/*
* Many nfs protocol calls return the new file attributes after
* an operation. Here we update the inode to reflect the state
goto out_err;
}
- spin_lock(&inode->i_lock);
-
/*
* Make sure the inode's type hasn't changed.
*/
- if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
- spin_unlock(&inode->i_lock);
+ if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
goto out_changed;
- }
/*
* Update the read time so we don't revalidate too often.
*/
- nfsi->read_cache_jiffies = fattr->timestamp;
+ nfsi->read_cache_jiffies = fattr->time_start;
+ nfsi->last_updated = jiffies;
/* Are we racing with known updates of the metadata on the server? */
data_unstable = ! (nfs_verify_change_attribute(inode, verifier) ||
/* Do we perhaps have any outstanding writes? */
if (nfsi->npages == 0) {
/* No, but did we race with nfs_end_data_update()? */
- if (verifier == nfsi->cache_change_attribute) {
+ if (time_after_eq(verifier, nfsi->cache_change_attribute)) {
inode->i_size = new_isize;
invalid |= NFS_INO_INVALID_DATA;
}
if (!nfs_have_delegation(inode, FMODE_READ))
nfsi->cache_validity |= invalid;
- spin_unlock(&inode->i_lock);
return 0;
out_changed:
/*
rpciod_down(); /* release rpciod */
- if (server->hostname != NULL)
- kfree(server->hostname);
+ kfree(server->hostname);
kfree(server);
}
struct nfs_inode *nfsi = NFS_I(inode);
/* If we are holding a delegation, return it! */
- if (nfsi->delegation != NULL)
- nfs_inode_return_delegation(inode);
+ nfs_inode_return_delegation(inode);
/* First call standard NFS clear_inode() code */
nfs_clear_inode(inode);
/* Now clear out any remaining state */
struct rpc_clnt *clnt = NULL;
struct rpc_timeout timeparms;
rpc_authflavor_t authflavour;
- int proto, err = -EIO;
+ int err = -EIO;
sb->s_blocksize_bits = 0;
sb->s_blocksize = 0;
server->acdirmax = data->acdirmax*HZ;
server->rpc_ops = &nfs_v4_clientops;
- /* Initialize timeout values */
-
- timeparms.to_initval = data->timeo * HZ / 10;
- timeparms.to_retries = data->retrans;
- timeparms.to_exponential = 1;
- if (!timeparms.to_retries)
- timeparms.to_retries = 5;
- proto = data->proto;
- /* Which IP protocol do we use? */
- switch (proto) {
- case IPPROTO_TCP:
- timeparms.to_maxval = RPC_MAX_TCP_TIMEOUT;
- if (!timeparms.to_initval)
- timeparms.to_initval = 600 * HZ / 10;
- break;
- case IPPROTO_UDP:
- timeparms.to_maxval = RPC_MAX_UDP_TIMEOUT;
- if (!timeparms.to_initval)
- timeparms.to_initval = 11 * HZ / 10;
- break;
- default:
- return -EINVAL;
- }
+ nfs_init_timeout_values(&timeparms, data->proto, data->timeo, data->retrans);
clp = nfs4_get_client(&server->addr.sin_addr);
if (!clp) {
down_write(&clp->cl_sem);
if (IS_ERR(clp->cl_rpcclient)) {
- xprt = xprt_create_proto(proto, &server->addr, &timeparms);
+ xprt = xprt_create_proto(data->proto, &server->addr, &timeparms);
if (IS_ERR(xprt)) {
up_write(&clp->cl_sem);
err = PTR_ERR(xprt);
return ERR_PTR(-ENOMEM);
}
if (copy_from_user(dst, src->data, maxlen)) {
- if (p != NULL)
- kfree(p);
+ kfree(p);
return ERR_PTR(-EFAULT);
}
dst[maxlen] = '\0';
out_err:
s = (struct super_block *)p;
out_free:
- if (server->mnt_path)
- kfree(server->mnt_path);
- if (server->hostname)
- kfree(server->hostname);
+ kfree(server->mnt_path);
+ kfree(server->hostname);
kfree(server);
return s;
}
destroy_nfsv4_state(server);
- if (server->hostname != NULL)
- kfree(server->hostname);
+ kfree(server->hostname);
kfree(server);
}