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Merge branch 'pnfs_generic'

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* pnfs_generic:
  NFSv4.1/pNFS: Cleanup constify struct pnfs_layout_range arguments
  NFSv4.1/pnfs: Cleanup copying of pnfs_layout_range structures
  NFSv4.1/pNFS: Cleanup pnfs_mark_matching_lsegs_invalid()
  NFSv4.1/pNFS: Fix a race in initiate_file_draining()
  NFSv4.1/pNFS: pnfs_error_mark_layout_for_return() must always return layout
  NFSv4.1/pNFS: pnfs_mark_matching_lsegs_return() should set the iomode
  NFSv4.1/pNFS: Use nfs4_stateid_copy for copying stateids
  NFSv4.1/pNFS: Don't pass stateids by value to pnfs_send_layoutreturn()
  NFS: Relax requirements in nfs_flush_incompatible
  NFSv4.1/pNFS: Don't queue up a new commit if the layout segment is invalid
  NFS: Allow multiple commit requests in flight per file
  NFS/pNFS: Fix up pNFS write reschedule layering violations and bugs
  NFSv4: List stateid information in the callback tracepoints
  NFSv4.1/pNFS: Don't return NFS4ERR_DELAY unnecessarily in CB_LAYOUTRECALL
  NFSv4.1/pNFS: Ensure we enforce RFC5661 Section 12.5.5.2.1
  pNFS: If we have to delay the layout callback, mark the layout for return
  NFSv4.1/pNFS: Add a helper to mark the layout as returned
  pNFS: Ensure nfs4_layoutget_prepare returns the correct error
This commit is contained in:
Trond Myklebust 2016-01-04 13:19:55 -05:00
commit 942e3d72a6
15 changed files with 298 additions and 119 deletions
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92
fs/nfs/write.c
View file

@ -21,6 +21,8 @@
#include <linux/nfs_page.h>
#include <linux/backing-dev.h>
#include <linux/export.h>
#include <linux/freezer.h>
#include <linux/wait.h>
#include <asm/uaccess.h>
@ -1155,7 +1157,8 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
if (req == NULL)
return 0;
l_ctx = req->wb_lock_context;
do_flush = req->wb_page != page || req->wb_context != ctx;
do_flush = req->wb_page != page ||
!nfs_match_open_context(req->wb_context, ctx);
/* for now, flush if more than 1 request in page_group */
do_flush |= req->wb_this_page != req;
if (l_ctx && flctx &&
@ -1353,9 +1356,15 @@ static void nfs_async_write_error(struct list_head *head)
}
}
static void nfs_async_write_reschedule_io(struct nfs_pgio_header *hdr)
{
nfs_async_write_error(&hdr->pages);
}
static const struct nfs_pgio_completion_ops nfs_async_write_completion_ops = {
.error_cleanup = nfs_async_write_error,
.completion = nfs_write_completion,
.reschedule_io = nfs_async_write_reschedule_io,
};
void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
@ -1556,27 +1565,29 @@ static void nfs_writeback_result(struct rpc_task *task,
}
}
static int nfs_commit_set_lock(struct nfs_inode *nfsi, int may_wait)
static int nfs_wait_atomic_killable(atomic_t *key)
{
int ret;
if (!test_and_set_bit(NFS_INO_COMMIT, &nfsi->flags))
return 1;
if (!may_wait)
return 0;
ret = out_of_line_wait_on_bit_lock(&nfsi->flags,
NFS_INO_COMMIT,
nfs_wait_bit_killable,
TASK_KILLABLE);
return (ret < 0) ? ret : 1;
if (fatal_signal_pending(current))
return -ERESTARTSYS;
freezable_schedule_unsafe();
return 0;
}
static void nfs_commit_clear_lock(struct nfs_inode *nfsi)
static int wait_on_commit(struct nfs_mds_commit_info *cinfo)
{
clear_bit(NFS_INO_COMMIT, &nfsi->flags);
smp_mb__after_atomic();
wake_up_bit(&nfsi->flags, NFS_INO_COMMIT);
return wait_on_atomic_t(&cinfo->rpcs_out,
nfs_wait_atomic_killable, TASK_KILLABLE);
}
static void nfs_commit_begin(struct nfs_mds_commit_info *cinfo)
{
atomic_inc(&cinfo->rpcs_out);
}
static void nfs_commit_end(struct nfs_mds_commit_info *cinfo)
{
if (atomic_dec_and_test(&cinfo->rpcs_out))
wake_up_atomic_t(&cinfo->rpcs_out);
}
void nfs_commitdata_release(struct nfs_commit_data *data)
@ -1693,6 +1704,13 @@ void nfs_retry_commit(struct list_head *page_list,
}
EXPORT_SYMBOL_GPL(nfs_retry_commit);
static void
nfs_commit_resched_write(struct nfs_commit_info *cinfo,
struct nfs_page *req)
{
__set_page_dirty_nobuffers(req->wb_page);
}
/*
* Commit dirty pages
*/
@ -1714,7 +1732,6 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how,
data->mds_ops, how, 0);
out_bad:
nfs_retry_commit(head, NULL, cinfo, 0);
cinfo->completion_ops->error_cleanup(NFS_I(inode));
return -ENOMEM;
}
@ -1776,8 +1793,7 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
clear_bdi_congested(&nfss->backing_dev_info, BLK_RW_ASYNC);
nfs_init_cinfo(&cinfo, data->inode, data->dreq);
if (atomic_dec_and_test(&cinfo.mds->rpcs_out))
nfs_commit_clear_lock(NFS_I(data->inode));
nfs_commit_end(cinfo.mds);
}
static void nfs_commit_release(void *calldata)
@ -1796,7 +1812,7 @@ static const struct rpc_call_ops nfs_commit_ops = {
static const struct nfs_commit_completion_ops nfs_commit_completion_ops = {
.completion = nfs_commit_release_pages,
.error_cleanup = nfs_commit_clear_lock,
.resched_write = nfs_commit_resched_write,
};
int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
@ -1815,30 +1831,25 @@ int nfs_commit_inode(struct inode *inode, int how)
LIST_HEAD(head);
struct nfs_commit_info cinfo;
int may_wait = how & FLUSH_SYNC;
int error = 0;
int res;
res = nfs_commit_set_lock(NFS_I(inode), may_wait);
if (res <= 0)
goto out_mark_dirty;
nfs_init_cinfo_from_inode(&cinfo, inode);
nfs_commit_begin(cinfo.mds);
res = nfs_scan_commit(inode, &head, &cinfo);
if (res) {
int error;
if (res)
error = nfs_generic_commit_list(inode, &head, how, &cinfo);
if (error < 0)
return error;
if (!may_wait)
goto out_mark_dirty;
error = wait_on_bit_action(&NFS_I(inode)->flags,
NFS_INO_COMMIT,
nfs_wait_bit_killable,
TASK_KILLABLE);
if (error < 0)
return error;
} else
nfs_commit_clear_lock(NFS_I(inode));
nfs_commit_end(cinfo.mds);
if (error < 0)
goto out_error;
if (!may_wait)
goto out_mark_dirty;
error = wait_on_commit(cinfo.mds);
if (error < 0)
return error;
return res;
out_error:
res = error;
/* Note: If we exit without ensuring that the commit is complete,
* we must mark the inode as dirty. Otherwise, future calls to
* sync_inode() with the WB_SYNC_ALL flag set will fail to ensure
@ -1848,6 +1859,7 @@ out_mark_dirty:
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
return res;
}
EXPORT_SYMBOL_GPL(nfs_commit_inode);
int nfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{