* Local function declarations
*/
static void nfs_redirty_request(struct nfs_page *req);
-static const struct rpc_call_ops nfs_write_common_ops;
static const struct rpc_call_ops nfs_commit_ops;
static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops;
static const struct nfs_commit_completion_ops nfs_commit_completion_ops;
+static const struct nfs_rw_ops nfs_rw_write_ops;
static struct kmem_cache *nfs_wdata_cachep;
static mempool_t *nfs_wdata_mempool;
}
EXPORT_SYMBOL_GPL(nfs_commit_free);
-struct nfs_write_header *nfs_writehdr_alloc(void)
+static struct nfs_rw_header *nfs_writehdr_alloc(void)
{
- struct nfs_write_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
-
- if (p) {
- struct nfs_pgio_header *hdr = &p->header;
+ struct nfs_rw_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO);
+ if (p)
memset(p, 0, sizeof(*p));
- INIT_LIST_HEAD(&hdr->pages);
- INIT_LIST_HEAD(&hdr->rpc_list);
- spin_lock_init(&hdr->lock);
- atomic_set(&hdr->refcnt, 0);
- hdr->verf = &p->verf;
- }
return p;
}
-EXPORT_SYMBOL_GPL(nfs_writehdr_alloc);
-static struct nfs_write_data *nfs_writedata_alloc(struct nfs_pgio_header *hdr,
- unsigned int pagecount)
+static void nfs_writehdr_free(struct nfs_rw_header *whdr)
{
- struct nfs_write_data *data, *prealloc;
-
- prealloc = &container_of(hdr, struct nfs_write_header, header)->rpc_data;
- if (prealloc->header == NULL)
- data = prealloc;
- else
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- goto out;
-
- if (nfs_pgarray_set(&data->pages, pagecount)) {
- data->header = hdr;
- atomic_inc(&hdr->refcnt);
- } else {
- if (data != prealloc)
- kfree(data);
- data = NULL;
- }
-out:
- return data;
-}
-
-void nfs_writehdr_free(struct nfs_pgio_header *hdr)
-{
- struct nfs_write_header *whdr = container_of(hdr, struct nfs_write_header, header);
mempool_free(whdr, nfs_wdata_mempool);
}
-EXPORT_SYMBOL_GPL(nfs_writehdr_free);
-
-void nfs_writedata_release(struct nfs_write_data *wdata)
-{
- struct nfs_pgio_header *hdr = wdata->header;
- struct nfs_write_header *write_header = container_of(hdr, struct nfs_write_header, header);
-
- put_nfs_open_context(wdata->args.context);
- if (wdata->pages.pagevec != wdata->pages.page_array)
- kfree(wdata->pages.pagevec);
- if (wdata == &write_header->rpc_data) {
- wdata->header = NULL;
- wdata = NULL;
- }
- if (atomic_dec_and_test(&hdr->refcnt))
- hdr->completion_ops->completion(hdr);
- /* Note: we only free the rpc_task after callbacks are done.
- * See the comment in rpc_free_task() for why
- */
- kfree(wdata);
-}
-EXPORT_SYMBOL_GPL(nfs_writedata_release);
static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
{
struct nfs_pageio_descriptor pgio;
int err;
- NFS_PROTO(page_file_mapping(page)->host)->write_pageio_init(&pgio,
- page->mapping->host,
- wb_priority(wbc),
- &nfs_async_write_completion_ops);
+ nfs_pageio_init_write(&pgio, page->mapping->host, wb_priority(wbc),
+ false, &nfs_async_write_completion_ops);
err = nfs_do_writepage(page, wbc, &pgio);
nfs_pageio_complete(&pgio);
if (err < 0)
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES);
- NFS_PROTO(inode)->write_pageio_init(&pgio, inode, wb_priority(wbc), &nfs_async_write_completion_ops);
+ nfs_pageio_init_write(&pgio, inode, wb_priority(wbc), false,
+ &nfs_async_write_completion_ops);
err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio);
nfs_pageio_complete(&pgio);
}
static inline
-int nfs_write_need_commit(struct nfs_write_data *data)
+int nfs_write_need_commit(struct nfs_pgio_data *data)
{
if (data->verf.committed == NFS_DATA_SYNC)
return data->header->lseg == NULL;
}
static inline
-int nfs_write_need_commit(struct nfs_write_data *data)
+int nfs_write_need_commit(struct nfs_pgio_data *data)
{
return 0;
}
goto next;
}
if (test_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags)) {
- memcpy(&req->wb_verf, &hdr->verf->verifier, sizeof(req->wb_verf));
+ memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
nfs_mark_request_commit(req, hdr->lseg, &cinfo);
goto next;
}
}
int nfs_initiate_write(struct rpc_clnt *clnt,
- struct nfs_write_data *data,
+ struct nfs_pgio_data *data,
const struct rpc_call_ops *call_ops,
int how, int flags)
{
/*
* Set up the argument/result storage required for the RPC call.
*/
-static void nfs_write_rpcsetup(struct nfs_write_data *data,
+static void nfs_write_rpcsetup(struct nfs_pgio_data *data,
unsigned int count, unsigned int offset,
int how, struct nfs_commit_info *cinfo)
{
nfs_fattr_init(&data->fattr);
}
-static int nfs_do_write(struct nfs_write_data *data,
+static int nfs_do_write(struct nfs_pgio_data *data,
const struct rpc_call_ops *call_ops,
int how)
{
const struct rpc_call_ops *call_ops,
int how)
{
- struct nfs_write_data *data;
+ struct nfs_pgio_data *data;
int ret = 0;
while (!list_empty(head)) {
int ret2;
- data = list_first_entry(head, struct nfs_write_data, list);
+ data = list_first_entry(head, struct nfs_pgio_data, list);
list_del_init(&data->list);
ret2 = nfs_do_write(data, call_ops, how);
{
set_bit(NFS_IOHDR_REDO, &hdr->flags);
while (!list_empty(&hdr->rpc_list)) {
- struct nfs_write_data *data = list_first_entry(&hdr->rpc_list,
- struct nfs_write_data, list);
+ struct nfs_pgio_data *data = list_first_entry(&hdr->rpc_list,
+ struct nfs_pgio_data, list);
list_del(&data->list);
- nfs_writedata_release(data);
+ nfs_pgio_data_release(data);
}
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
}
{
struct nfs_page *req = hdr->req;
struct page *page = req->wb_page;
- struct nfs_write_data *data;
+ struct nfs_pgio_data *data;
size_t wsize = desc->pg_bsize, nbytes;
unsigned int offset;
int requests = 0;
do {
size_t len = min(nbytes, wsize);
- data = nfs_writedata_alloc(hdr, 1);
+ data = nfs_pgio_data_alloc(hdr, 1);
if (!data) {
nfs_flush_error(desc, hdr);
return -ENOMEM;
} while (nbytes != 0);
nfs_list_remove_request(req);
nfs_list_add_request(req, &hdr->pages);
- desc->pg_rpc_callops = &nfs_write_common_ops;
+ desc->pg_rpc_callops = &nfs_pgio_common_ops;
return 0;
}
{
struct nfs_page *req;
struct page **pages;
- struct nfs_write_data *data;
+ struct nfs_pgio_data *data;
struct list_head *head = &desc->pg_list;
struct nfs_commit_info cinfo;
- data = nfs_writedata_alloc(hdr, nfs_page_array_len(desc->pg_base,
+ data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base,
desc->pg_count));
if (!data) {
nfs_flush_error(desc, hdr);
/* Set up the argument struct */
nfs_write_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo);
list_add(&data->list, &hdr->rpc_list);
- desc->pg_rpc_callops = &nfs_write_common_ops;
+ desc->pg_rpc_callops = &nfs_pgio_common_ops;
return 0;
}
static int nfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc)
{
- struct nfs_write_header *whdr;
+ struct nfs_rw_header *whdr;
struct nfs_pgio_header *hdr;
int ret;
- whdr = nfs_writehdr_alloc();
+ whdr = nfs_rw_header_alloc(desc->pg_rw_ops);
if (!whdr) {
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
return -ENOMEM;
}
hdr = &whdr->header;
- nfs_pgheader_init(desc, hdr, nfs_writehdr_free);
+ nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
atomic_inc(&hdr->refcnt);
ret = nfs_generic_flush(desc, hdr);
if (ret == 0)
};
void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
- struct inode *inode, int ioflags,
+ struct inode *inode, int ioflags, bool force_mds,
const struct nfs_pgio_completion_ops *compl_ops)
{
- nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops, compl_ops,
- NFS_SERVER(inode)->wsize, ioflags);
+ struct nfs_server *server = NFS_SERVER(inode);
+ const struct nfs_pageio_ops *pg_ops = &nfs_pageio_write_ops;
+
+#ifdef CONFIG_NFS_V4_1
+ if (server->pnfs_curr_ld && !force_mds)
+ pg_ops = server->pnfs_curr_ld->pg_write_ops;
+#endif
+ nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_write_ops,
+ server->wsize, ioflags);
}
EXPORT_SYMBOL_GPL(nfs_pageio_init_write);
EXPORT_SYMBOL_GPL(nfs_pageio_reset_write_mds);
-void nfs_write_prepare(struct rpc_task *task, void *calldata)
-{
- struct nfs_write_data *data = calldata;
- int err;
- err = NFS_PROTO(data->header->inode)->write_rpc_prepare(task, data);
- if (err)
- rpc_exit(task, err);
-}
-
void nfs_commit_prepare(struct rpc_task *task, void *calldata)
{
struct nfs_commit_data *data = calldata;
NFS_PROTO(data->inode)->commit_rpc_prepare(task, data);
}
-/*
- * Handle a write reply that flushes a whole page.
- *
- * FIXME: There is an inherent race with invalidate_inode_pages and
- * writebacks since the page->count is kept > 1 for as long
- * as the page has a write request pending.
- */
-static void nfs_writeback_done_common(struct rpc_task *task, void *calldata)
-{
- struct nfs_write_data *data = calldata;
-
- nfs_writeback_done(task, data);
-}
-
-static void nfs_writeback_release_common(void *calldata)
+static void nfs_writeback_release_common(struct nfs_pgio_data *data)
{
- struct nfs_write_data *data = calldata;
struct nfs_pgio_header *hdr = data->header;
int status = data->task.tk_status;
if (test_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags))
; /* Do nothing */
else if (!test_and_set_bit(NFS_IOHDR_NEED_COMMIT, &hdr->flags))
- memcpy(hdr->verf, &data->verf, sizeof(*hdr->verf));
- else if (memcmp(hdr->verf, &data->verf, sizeof(*hdr->verf)))
+ memcpy(&hdr->verf, &data->verf, sizeof(hdr->verf));
+ else if (memcmp(&hdr->verf, &data->verf, sizeof(hdr->verf)))
set_bit(NFS_IOHDR_NEED_RESCHED, &hdr->flags);
spin_unlock(&hdr->lock);
}
- nfs_writedata_release(data);
}
-static const struct rpc_call_ops nfs_write_common_ops = {
- .rpc_call_prepare = nfs_write_prepare,
- .rpc_call_done = nfs_writeback_done_common,
- .rpc_release = nfs_writeback_release_common,
-};
+/*
+ * Special version of should_remove_suid() that ignores capabilities.
+ */
+static int nfs_should_remove_suid(const struct inode *inode)
+{
+ umode_t mode = inode->i_mode;
+ int kill = 0;
+ /* suid always must be killed */
+ if (unlikely(mode & S_ISUID))
+ kill = ATTR_KILL_SUID;
+
+ /*
+ * sgid without any exec bits is just a mandatory locking mark; leave
+ * it alone. If some exec bits are set, it's a real sgid; kill it.
+ */
+ if (unlikely((mode & S_ISGID) && (mode & S_IXGRP)))
+ kill |= ATTR_KILL_SGID;
+
+ if (unlikely(kill && S_ISREG(mode)))
+ return kill;
+
+ return 0;
+}
/*
* This function is called when the WRITE call is complete.
*/
-void nfs_writeback_done(struct rpc_task *task, struct nfs_write_data *data)
+static int nfs_writeback_done(struct rpc_task *task, struct nfs_pgio_data *data,
+ struct inode *inode)
{
- struct nfs_writeargs *argp = &data->args;
- struct nfs_writeres *resp = &data->res;
- struct inode *inode = data->header->inode;
int status;
- dprintk("NFS: %5u nfs_writeback_done (status %d)\n",
- task->tk_pid, task->tk_status);
-
/*
* ->write_done will attempt to use post-op attributes to detect
* conflicting writes by other clients. A strict interpretation
*/
status = NFS_PROTO(inode)->write_done(task, data);
if (status != 0)
- return;
- nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, resp->count);
+ return status;
+ nfs_add_stats(inode, NFSIOS_SERVERWRITTENBYTES, data->res.count);
#if IS_ENABLED(CONFIG_NFS_V3) || IS_ENABLED(CONFIG_NFS_V4)
- if (resp->verf->committed < argp->stable && task->tk_status >= 0) {
+ if (data->res.verf->committed < data->args.stable && task->tk_status >= 0) {
/* We tried a write call, but the server did not
* commit data to stable storage even though we
* requested it.
dprintk("NFS: faulty NFS server %s:"
" (committed = %d) != (stable = %d)\n",
NFS_SERVER(inode)->nfs_client->cl_hostname,
- resp->verf->committed, argp->stable);
+ data->res.verf->committed, data->args.stable);
complain = jiffies + 300 * HZ;
}
}
#endif
- if (task->tk_status < 0)
- nfs_set_pgio_error(data->header, task->tk_status, argp->offset);
- else if (resp->count < argp->count) {
+
+ /* Deal with the suid/sgid bit corner case */
+ if (nfs_should_remove_suid(inode))
+ nfs_mark_for_revalidate(inode);
+ return 0;
+}
+
+/*
+ * This function is called when the WRITE call is complete.
+ */
+static void nfs_writeback_result(struct rpc_task *task, struct nfs_pgio_data *data)
+{
+ struct nfs_pgio_args *argp = &data->args;
+ struct nfs_pgio_res *resp = &data->res;
+
+ if (resp->count < argp->count) {
static unsigned long complain;
/* This a short write! */
- nfs_inc_stats(inode, NFSIOS_SHORTWRITE);
+ nfs_inc_stats(data->header->inode, NFSIOS_SHORTWRITE);
/* Has the server at least made some progress? */
if (resp->count == 0) {
int __init nfs_init_writepagecache(void)
{
nfs_wdata_cachep = kmem_cache_create("nfs_write_data",
- sizeof(struct nfs_write_header),
+ sizeof(struct nfs_rw_header),
0, SLAB_HWCACHE_ALIGN,
NULL);
if (nfs_wdata_cachep == NULL)
kmem_cache_destroy(nfs_wdata_cachep);
}
+static const struct nfs_rw_ops nfs_rw_write_ops = {
+ .rw_mode = FMODE_WRITE,
+ .rw_alloc_header = nfs_writehdr_alloc,
+ .rw_free_header = nfs_writehdr_free,
+ .rw_release = nfs_writeback_release_common,
+ .rw_done = nfs_writeback_done,
+ .rw_result = nfs_writeback_result,
+};
projects / firefly-linux-kernel-4.4.55.git / blobdiff