Preparing for LAYUTGET invocation in nfs_write_begin to be the
only invocation in the write path.
It isn't used at all yet, but it should be properly referenced/dereferenced
Signed-off-by: Fred Isaman <iisaman@xxxxxxxxxx>
---
fs/nfs/file.c | 21 ++++++++++++++++++---
1 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 03601d2..e308244 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -414,12 +414,17 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping,
pgoff_t index = pos >> PAGE_CACHE_SHIFT;
struct page *page;
int once_thru = 0;
+ struct pnfs_layout_segment *lseg;
dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n",
file->f_path.dentry->d_parent->d_name.name,
file->f_path.dentry->d_name.name,
mapping->host->i_ino, len, (long long) pos);
+ pnfs_update_layout(mapping->host,
+ nfs_file_open_context(file),
+ NFS4_MAX_UINT64, 0, IOMODE_RW,
+ &lseg);
start:
/*
* Prevent starvation issues if someone is doing a consistency
@@ -428,11 +433,13 @@ start:
ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING,
nfs_wait_bit_killable, TASK_KILLABLE);
if (ret)
- return ret;
+ goto out;
page = grab_cache_page_write_begin(mapping, index, flags);
- if (!page)
- return -ENOMEM;
+ if (!page) {
+ ret = -ENOMEM;
+ goto out;
+ }
*pagep = page;
ret = nfs_flush_incompatible(file, page);
@@ -447,6 +454,12 @@ start:
if (!ret)
goto start;
}
+ *fsdata = lseg;
+ out:
+ if (ret) {
+ put_lseg(lseg);
+ *fsdata = NULL;
+ }
return ret;
}
@@ -456,6 +469,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
{
unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
int status;
+ struct pnfs_layout_segment *lseg = fsdata;
dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n",
file->f_path.dentry->d_parent->d_name.name,
@@ -486,6 +500,7 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
unlock_page(page);
page_cache_release(page);
+ put_lseg(lseg);
if (status < 0)
return status;
--
1.6.6.1
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