NFSv4/pnfs: Support a list of commit arrays in struct pnfs_ds_commit_info

When we have multiple layout segments with different lists of mirrored
data, we need to track the commits on a per layout segment basis.
This patch adds a list to support this tracking in struct
pnfs_ds_commit_info.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index ade2435..f9a73fe 100644 (file)
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -305,6 +305,7 @@ static inline struct nfs_direct_req *nfs_direct_req_alloc(void)
        kref_get(&dreq->kref);
        init_completion(&dreq->completion);
        INIT_LIST_HEAD(&dreq->mds_cinfo.list);
+       pnfs_init_ds_commit_info(&dreq->ds_cinfo);
        dreq->verf.committed = NFS_INVALID_STABLE_HOW;  /* not set yet */
        INIT_WORK(&dreq->work, nfs_direct_write_schedule_work);
        spin_lock_init(&dreq->lock);

diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index bd23439..b051d5d 100644 (file)
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -1140,7 +1140,10 @@ filelayout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
        struct nfs4_filelayout *flo;
 
        flo = kzalloc(sizeof(*flo), gfp_flags);
-       return flo != NULL ? &flo->generic_hdr : NULL;
+       if (flo == NULL)
+               return NULL;
+       pnfs_init_ds_commit_info(&flo->commit_info);
+       return &flo->generic_hdr;
 }
 
 static void

diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 1972820..c9e79c8 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -48,6 +48,7 @@ ff_layout_alloc_layout_hdr(struct inode *inode, gfp_t gfp_flags)
 
        ffl = kzalloc(sizeof(*ffl), gfp_flags);
        if (ffl) {
+               pnfs_init_ds_commit_info(&ffl->commit_info);
                INIT_LIST_HEAD(&ffl->error_list);
                INIT_LIST_HEAD(&ffl->mirrors);
                ffl->last_report_time = ktime_get();

diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index f6b1099..b293afb 100644 (file)
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -463,6 +463,12 @@ pnfs_get_ds_info(struct inode *inode)
 }
 
 static inline void
+pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
+{
+       INIT_LIST_HEAD(&fl_cinfo->commits);
+}
+
+static inline void
 pnfs_generic_mark_devid_invalid(struct nfs4_deviceid_node *node)
 {
        set_bit(NFS_DEVICEID_INVALID, &node->flags);
@@ -759,6 +765,11 @@ pnfs_get_ds_info(struct inode *inode)
        return NULL;
 }
 
+static inline void
+pnfs_init_ds_commit_info(struct pnfs_ds_commit_info *fl_cinfo)
+{
+}
+
 static inline bool
 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
                         struct nfs_commit_info *cinfo, u32 ds_commit_idx)

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index e91c917..9946787 100644 (file)
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1280,6 +1280,7 @@ struct pnfs_commit_array {
 };
 
 struct pnfs_ds_commit_info {
+       struct list_head commits;
        unsigned int nwritten;
        unsigned int ncommitting;
        unsigned int nbuckets;