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nfs: fold nfs_folio_find_and_lock_request into nfs_lock_and_join_requests

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Fold nfs_folio_find_and_lock_request into the only caller to prepare
for changes to this code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Christoph Hellwig 2024-07-01 07:26:51 +02:00 committed by Anna Schumaker
parent 9eb7c484db
commit c3f2235782
1 changed files with 27 additions and 41 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

68
fs/nfs/write.c
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@ -194,38 +194,6 @@ static struct nfs_page *nfs_folio_find_head_request(struct folio *folio)
return req;
}
static struct nfs_page *nfs_folio_find_and_lock_request(struct folio *folio)
{
struct inode *inode = folio->mapping->host;
struct nfs_page *head;
int ret;
retry:
head = nfs_folio_find_head_request(folio);
if (!head)
return NULL;
while (!nfs_lock_request(head)) {
ret = nfs_wait_on_request(head);
if (ret < 0)
return ERR_PTR(ret);
}
/* Ensure that nobody removed the request before we locked it */
if (head != folio->private) {
nfs_unlock_and_release_request(head);
goto retry;
}
ret = nfs_cancel_remove_inode(head, inode);
if (ret < 0) {
nfs_unlock_and_release_request(head);
return ERR_PTR(ret);
}
return head;
}
/* Adjust the file length if we're writing beyond the end */
static void nfs_grow_file(struct folio *folio, unsigned int offset,
unsigned int count)
@ -532,26 +500,44 @@ static struct nfs_page *nfs_lock_and_join_requests(struct folio *folio)
struct nfs_commit_info cinfo;
int ret;
nfs_init_cinfo_from_inode(&cinfo, inode);
/*
* A reference is taken only on the head request which acts as a
* reference to the whole page group - the group will not be destroyed
* until the head reference is released.
*/
head = nfs_folio_find_and_lock_request(folio);
if (IS_ERR_OR_NULL(head))
return head;
retry:
head = nfs_folio_find_head_request(folio);
if (!head)
return NULL;
while (!nfs_lock_request(head)) {
ret = nfs_wait_on_request(head);
if (ret < 0)
return ERR_PTR(ret);
}
/* Ensure that nobody removed the request before we locked it */
if (head != folio->private) {
nfs_unlock_and_release_request(head);
goto retry;
}
ret = nfs_cancel_remove_inode(head, inode);
if (ret < 0)
goto out_unlock;
/* lock each request in the page group */
ret = nfs_page_group_lock_subrequests(head);
if (ret < 0) {
nfs_unlock_and_release_request(head);
return ERR_PTR(ret);
}
if (ret < 0)
goto out_unlock;
nfs_init_cinfo_from_inode(&cinfo, inode);
nfs_join_page_group(head, &cinfo, inode);
return head;
out_unlock:
nfs_unlock_and_release_request(head);
return ERR_PTR(ret);
}
static void nfs_write_error(struct nfs_page *req, int error)