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Code Issues Releases Wiki Activity

NFS: Use the correct commit info in nfs_join_page_group()

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[ Upstream commit b193a78ddb ]

Ensure that nfs_clear_request_commit() updates the correct counters when
it removes them from the commit list.

Fixes: ed5d588fe4 ("NFS: Try to join page groups before an O_DIRECT retransmission")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust 2023-09-04 12:34:40 -04:00 committed by Greg Kroah-Hartman
parent b911329317
commit a354b4a367
3 changed files with 20 additions and 15 deletions
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8
fs/nfs/direct.c
View file

@ -525,7 +525,9 @@ static void nfs_direct_add_page_head(struct list_head *list,
kref_get(&head->wb_kref);
}
static void nfs_direct_join_group(struct list_head *list, struct inode *inode)
static void nfs_direct_join_group(struct list_head *list,
struct nfs_commit_info *cinfo,
struct inode *inode)
{
struct nfs_page *req, *subreq;
@ -547,7 +549,7 @@ static void nfs_direct_join_group(struct list_head *list, struct inode *inode)
nfs_release_request(subreq);
}
} while ((subreq = subreq->wb_this_page) != req);
nfs_join_page_group(req, inode);
nfs_join_page_group(req, cinfo, inode);
}
}
@ -573,7 +575,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
nfs_init_cinfo_from_dreq(&cinfo, dreq);
nfs_direct_write_scan_commit_list(dreq->inode, &reqs, &cinfo);
nfs_direct_join_group(&reqs, dreq->inode);
nfs_direct_join_group(&reqs, &cinfo, dreq->inode);
dreq->count = 0;
dreq->max_count = 0;

23
fs/nfs/write.c
View file

@ -58,7 +58,8 @@ 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 void nfs_inode_remove_request(struct nfs_page *req);
static void nfs_clear_request_commit(struct nfs_page *req);
static void nfs_clear_request_commit(struct nfs_commit_info *cinfo,
struct nfs_page *req);
static void nfs_init_cinfo_from_inode(struct nfs_commit_info *cinfo,
struct inode *inode);
static struct nfs_page *
@ -500,8 +501,8 @@ nfs_destroy_unlinked_subrequests(struct nfs_page *destroy_list,
* the (former) group. All subrequests are removed from any write or commit
* lists, unlinked from the group and destroyed.
*/
void
nfs_join_page_group(struct nfs_page *head, struct inode *inode)
void nfs_join_page_group(struct nfs_page *head, struct nfs_commit_info *cinfo,
struct inode *inode)
{
struct nfs_page *subreq;
struct nfs_page *destroy_list = NULL;
@ -531,7 +532,7 @@ nfs_join_page_group(struct nfs_page *head, struct inode *inode)
* Commit list removal accounting is done after locks are dropped */
subreq = head;
do {
nfs_clear_request_commit(subreq);
nfs_clear_request_commit(cinfo, subreq);
subreq = subreq->wb_this_page;
} while (subreq != head);
@ -565,8 +566,10 @@ nfs_lock_and_join_requests(struct page *page)
{
struct inode *inode = page_file_mapping(page)->host;
struct nfs_page *head;
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
@ -583,7 +586,7 @@ nfs_lock_and_join_requests(struct page *page)
return ERR_PTR(ret);
}
nfs_join_page_group(head, inode);
nfs_join_page_group(head, &cinfo, inode);
return head;
}
@ -945,18 +948,16 @@ nfs_clear_page_commit(struct page *page)
}
/* Called holding the request lock on @req */
static void
nfs_clear_request_commit(struct nfs_page *req)
static void nfs_clear_request_commit(struct nfs_commit_info *cinfo,
struct nfs_page *req)
{
if (test_bit(PG_CLEAN, &req->wb_flags)) {
struct nfs_open_context *ctx = nfs_req_openctx(req);
struct inode *inode = d_inode(ctx->dentry);
struct nfs_commit_info cinfo;
nfs_init_cinfo_from_inode(&cinfo, inode);
mutex_lock(&NFS_I(inode)->commit_mutex);
if (!pnfs_clear_request_commit(req, &cinfo)) {
nfs_request_remove_commit_list(req, &cinfo);
if (!pnfs_clear_request_commit(req, cinfo)) {
nfs_request_remove_commit_list(req, cinfo);
}
mutex_unlock(&NFS_I(inode)->commit_mutex);
nfs_clear_page_commit(req->wb_page);

4
include/linux/nfs_page.h
View file

@ -145,7 +145,9 @@ extern void nfs_unlock_request(struct nfs_page *req);
extern void nfs_unlock_and_release_request(struct nfs_page *);
extern struct nfs_page *nfs_page_group_lock_head(struct nfs_page *req);
extern int nfs_page_group_lock_subrequests(struct nfs_page *head);
extern void nfs_join_page_group(struct nfs_page *head, struct inode *inode);
extern void nfs_join_page_group(struct nfs_page *head,
struct nfs_commit_info *cinfo,
struct inode *inode);
extern int nfs_page_group_lock(struct nfs_page *);
extern void nfs_page_group_unlock(struct nfs_page *);
extern bool nfs_page_group_sync_on_bit(struct nfs_page *, unsigned int);