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-rw-r--r--fs/nfs/pagelist.c5
-rw-r--r--fs/nfs/pnfs.h73
-rw-r--r--fs/nfs/write.c41
-rw-r--r--include/linux/nfs_fs.h1
-rw-r--r--include/linux/nfs_page.h6
5 files changed, 108 insertions, 18 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index fd85618..87a593c 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -398,6 +398,7 @@ int nfs_scan_list(struct nfs_inode *nfsi,
pgoff_t idx_end;
int found, i;
int res;
+ struct list_head *list;
res = 0;
if (npages == 0)
@@ -418,10 +419,10 @@ int nfs_scan_list(struct nfs_inode *nfsi,
idx_start = req->wb_index + 1;
if (nfs_set_page_tag_locked(req)) {
kref_get(&req->wb_kref);
- nfs_list_remove_request(req);
radix_tree_tag_clear(&nfsi->nfs_page_tree,
req->wb_index, tag);
- nfs_list_add_request(req, dst);
+ list = pnfs_choose_commit_list(req, dst);
+ nfs_list_add_request(req, list);
res++;
if (res == INT_MAX)
goto out;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 6380b94..5370f1b 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -74,6 +74,13 @@ struct pnfs_layoutdriver_type {
/* test for nfs page cache coalescing */
int (*pg_test)(struct nfs_pageio_descriptor *, struct nfs_page *, struct nfs_page *);
+ /* Returns true if layoutdriver wants to divert this request to
+ * driver's commit routine.
+ */
+ bool (*mark_pnfs_commit)(struct pnfs_layout_segment *lseg);
+ struct list_head * (*choose_commit_list) (struct nfs_page *req);
+ int (*commit_pagelist)(struct inode *inode, struct list_head *mds_pages, int how);
+
/*
* Return PNFS_ATTEMPTED to indicate the layout code has attempted
* I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS
@@ -169,6 +176,51 @@ static inline int pnfs_enabled_sb(struct nfs_server *nfss)
return nfss->pnfs_curr_ld != NULL;
}
+static inline void
+pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
+{
+ if (lseg) {
+ struct pnfs_layoutdriver_type *ld;
+
+ ld = NFS_SERVER(req->wb_page->mapping->host)->pnfs_curr_ld;
+ if (ld->mark_pnfs_commit && ld->mark_pnfs_commit(lseg)) {
+ set_bit(PG_PNFS_COMMIT, &req->wb_flags);
+ req->wb_commit_lseg = get_lseg(lseg);
+ }
+ }
+}
+
+static inline int
+pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how)
+{
+ if (!test_and_clear_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags))
+ return PNFS_NOT_ATTEMPTED;
+ return NFS_SERVER(inode)->pnfs_curr_ld->commit_pagelist(inode, mds_pages, how);
+}
+
+static inline struct list_head *
+pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds)
+{
+ struct list_head *rv;
+
+ if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags)) {
+ struct inode *inode = req->wb_commit_lseg->pls_layout->plh_inode;
+
+ set_bit(NFS_INO_PNFS_COMMIT, &NFS_I(inode)->flags);
+ rv = NFS_SERVER(inode)->pnfs_curr_ld->choose_commit_list(req);
+ /* matched by ref taken when PG_PNFS_COMMIT is set */
+ put_lseg(req->wb_commit_lseg);
+ } else
+ rv = mds;
+ return rv;
+}
+
+static inline void pnfs_clear_request_commit(struct nfs_page *req)
+{
+ if (test_and_clear_bit(PG_PNFS_COMMIT, &req->wb_flags))
+ put_lseg(req->wb_commit_lseg);
+}
+
#else /* CONFIG_NFS_V4_1 */
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
@@ -252,6 +304,27 @@ pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *ino)
pgio->pg_test = NULL;
}
+static inline void
+pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
+{
+}
+
+static inline int
+pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how)
+{
+ return PNFS_NOT_ATTEMPTED;
+}
+
+static inline struct list_head *
+pnfs_choose_commit_list(struct nfs_page *req, struct list_head *mds)
+{
+ return mds;
+}
+
+static inline void pnfs_clear_request_commit(struct nfs_page *req)
+{
+}
+
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index f5f005e..6927a18 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -441,7 +441,7 @@ nfs_mark_request_dirty(struct nfs_page *req)
* Add a request to the inode's commit list.
*/
static void
-nfs_mark_request_commit(struct nfs_page *req)
+nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
{
struct inode *inode = req->wb_context->path.dentry->d_inode;
struct nfs_inode *nfsi = NFS_I(inode);
@@ -453,6 +453,7 @@ nfs_mark_request_commit(struct nfs_page *req)
NFS_PAGE_TAG_COMMIT);
nfsi->ncommit++;
spin_unlock(&inode->i_lock);
+ pnfs_mark_request_commit(req, lseg);
inc_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
inc_bdi_stat(req->wb_page->mapping->backing_dev_info, BDI_RECLAIMABLE);
__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
@@ -481,10 +482,11 @@ int nfs_write_need_commit(struct nfs_write_data *data)
}
static inline
-int nfs_reschedule_unstable_write(struct nfs_page *req)
+int nfs_reschedule_unstable_write(struct nfs_page *req,
+ struct nfs_write_data *data)
{
if (test_and_clear_bit(PG_NEED_COMMIT, &req->wb_flags)) {
- nfs_mark_request_commit(req);
+ nfs_mark_request_commit(req, data->lseg);
return 1;
}
if (test_and_clear_bit(PG_NEED_RESCHED, &req->wb_flags)) {
@@ -495,7 +497,7 @@ int nfs_reschedule_unstable_write(struct nfs_page *req)
}
#else
static inline void
-nfs_mark_request_commit(struct nfs_page *req)
+nfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg)
{
}
@@ -512,7 +514,8 @@ int nfs_write_need_commit(struct nfs_write_data *data)
}
static inline
-int nfs_reschedule_unstable_write(struct nfs_page *req)
+int nfs_reschedule_unstable_write(struct nfs_page *req,
+ struct nfs_write_data *data)
{
return 0;
}
@@ -615,9 +618,11 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
}
if (nfs_clear_request_commit(req) &&
- radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
- req->wb_index, NFS_PAGE_TAG_COMMIT) != NULL)
+ radix_tree_tag_clear(&NFS_I(inode)->nfs_page_tree,
+ req->wb_index, NFS_PAGE_TAG_COMMIT) != NULL) {
NFS_I(inode)->ncommit--;
+ pnfs_clear_request_commit(req);
+ }
/* Okay, the request matches. Update the region */
if (offset < req->wb_offset) {
@@ -765,11 +770,12 @@ int nfs_updatepage(struct file *file, struct page *page,
return status;
}
-static void nfs_writepage_release(struct nfs_page *req)
+static void nfs_writepage_release(struct nfs_page *req,
+ struct nfs_write_data *data)
{
struct page *page = req->wb_page;
- if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req))
+ if (PageError(req->wb_page) || !nfs_reschedule_unstable_write(req, data))
nfs_inode_remove_request(req);
nfs_clear_page_tag_locked(req);
nfs_end_page_writeback(page);
@@ -1087,7 +1093,7 @@ static void nfs_writeback_release_partial(void *calldata)
out:
if (atomic_dec_and_test(&req->wb_complete))
- nfs_writepage_release(req);
+ nfs_writepage_release(req, data);
nfs_writedata_release(calldata);
}
@@ -1154,7 +1160,7 @@ static void nfs_writeback_release_full(void *calldata)
if (nfs_write_need_commit(data)) {
memcpy(&req->wb_verf, &data->verf, sizeof(req->wb_verf));
- nfs_mark_request_commit(req);
+ nfs_mark_request_commit(req, data->lseg);
dprintk(" marked for commit\n");
goto next;
}
@@ -1357,14 +1363,15 @@ static void nfs_init_commit(struct nfs_write_data *data,
nfs_fattr_init(&data->fattr);
}
-static void nfs_retry_commit(struct list_head *page_list)
+static void nfs_retry_commit(struct list_head *page_list,
+ struct pnfs_layout_segment *lseg)
{
struct nfs_page *req;
while (!list_empty(page_list)) {
req = nfs_list_entry(page_list->next);
nfs_list_remove_request(req);
- nfs_mark_request_commit(req);
+ nfs_mark_request_commit(req, lseg);
dec_zone_page_state(req->wb_page, NR_UNSTABLE_NFS);
dec_bdi_stat(req->wb_page->mapping->backing_dev_info,
BDI_RECLAIMABLE);
@@ -1389,7 +1396,7 @@ nfs_commit_list(struct inode *inode, struct list_head *head, int how)
nfs_init_commit(data, head);
return nfs_initiate_commit(data, NFS_CLIENT(inode), data->mds_ops, how);
out_bad:
- nfs_retry_commit(head);
+ nfs_retry_commit(head, NULL);
nfs_commit_clear_lock(NFS_I(inode));
return -ENOMEM;
}
@@ -1477,7 +1484,11 @@ int nfs_commit_inode(struct inode *inode, int how)
res = nfs_scan_commit(inode, &head, 0, 0);
spin_unlock(&inode->i_lock);
if (res) {
- int error = nfs_commit_list(inode, &head, how);
+ int error;
+
+ error = pnfs_commit_list(inode, &head, how);
+ if (error == PNFS_NOT_ATTEMPTED)
+ error = nfs_commit_list(inode, &head, how);
if (error < 0)
return error;
if (!may_wait)
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 4179c36..eddda6c 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -226,6 +226,7 @@ struct nfs_inode {
#define NFS_INO_FSCACHE (5) /* inode can be cached by FS-Cache */
#define NFS_INO_FSCACHE_LOCK (6) /* FS-Cache cookie management lock */
#define NFS_INO_COMMIT (7) /* inode is committing unstable writes */
+#define NFS_INO_PNFS_COMMIT (8) /* use pnfs code for commit */
static inline struct nfs_inode *NFS_I(const struct inode *inode)
{
diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h
index 92d54c8..8023e4e 100644
--- a/include/linux/nfs_page.h
+++ b/include/linux/nfs_page.h
@@ -33,11 +33,15 @@ enum {
PG_CLEAN,
PG_NEED_COMMIT,
PG_NEED_RESCHED,
+ PG_PNFS_COMMIT,
};
struct nfs_inode;
struct nfs_page {
- struct list_head wb_list; /* Defines state of page: */
+ union {
+ struct list_head wb_list; /* Defines state of page: */
+ struct pnfs_layout_segment *wb_commit_lseg; /* Used when PG_PNFS_COMMIT set */
+ };
struct page *wb_page; /* page to read in/write out */
struct nfs_open_context *wb_context; /* File state context info */
struct nfs_lock_context *wb_lock_context; /* lock context info */
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