Merge branch 'bugfixes'
* bugfixes:
pNFS/flexfiles: Fix an XDR encoding bug in layoutreturn
pNFS/flexfiles: Improve merging of errors in LAYOUTRETURN
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 6594e9f..5bcd92d 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1948,11 +1948,9 @@
start = xdr_reserve_space(xdr, 4);
BUG_ON(!start);
- if (ff_layout_encode_ioerr(flo, xdr, args))
- goto out;
-
+ ff_layout_encode_ioerr(flo, xdr, args);
ff_layout_encode_iostats(flo, xdr, args);
-out:
+
*start = cpu_to_be32((xdr->p - start - 1) * 4);
dprintk("%s: Return\n", __func__);
}
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index bd03275..29898a9 100644
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -218,63 +218,55 @@
err->length = end - err->offset;
}
-static bool ds_error_can_merge(struct nfs4_ff_layout_ds_err *err, u64 offset,
- u64 length, int status, enum nfs_opnum4 opnum,
- nfs4_stateid *stateid,
- struct nfs4_deviceid *deviceid)
+static int
+ff_ds_error_match(const struct nfs4_ff_layout_ds_err *e1,
+ const struct nfs4_ff_layout_ds_err *e2)
{
- return err->status == status && err->opnum == opnum &&
- nfs4_stateid_match(&err->stateid, stateid) &&
- !memcmp(&err->deviceid, deviceid, sizeof(*deviceid)) &&
- end_offset(err->offset, err->length) >= offset &&
- err->offset <= end_offset(offset, length);
+ int ret;
+
+ if (e1->opnum != e2->opnum)
+ return e1->opnum < e2->opnum ? -1 : 1;
+ if (e1->status != e2->status)
+ return e1->status < e2->status ? -1 : 1;
+ ret = memcmp(&e1->stateid, &e2->stateid, sizeof(e1->stateid));
+ if (ret != 0)
+ return ret;
+ ret = memcmp(&e1->deviceid, &e2->deviceid, sizeof(e1->deviceid));
+ if (ret != 0)
+ return ret;
+ if (end_offset(e1->offset, e1->length) < e2->offset)
+ return -1;
+ if (e1->offset > end_offset(e2->offset, e2->length))
+ return 1;
+ /* If ranges overlap or are contiguous, they are the same */
+ return 0;
}
-static bool merge_ds_error(struct nfs4_ff_layout_ds_err *old,
- struct nfs4_ff_layout_ds_err *new)
-{
- if (!ds_error_can_merge(old, new->offset, new->length, new->status,
- new->opnum, &new->stateid, &new->deviceid))
- return false;
-
- extend_ds_error(old, new->offset, new->length);
- return true;
-}
-
-static bool
+static void
ff_layout_add_ds_error_locked(struct nfs4_flexfile_layout *flo,
struct nfs4_ff_layout_ds_err *dserr)
{
- struct nfs4_ff_layout_ds_err *err;
+ struct nfs4_ff_layout_ds_err *err, *tmp;
+ struct list_head *head = &flo->error_list;
+ int match;
- list_for_each_entry(err, &flo->error_list, list) {
- if (merge_ds_error(err, dserr)) {
- return true;
- }
- }
-
- list_add(&dserr->list, &flo->error_list);
- return false;
-}
-
-static bool
-ff_layout_update_ds_error(struct nfs4_flexfile_layout *flo, u64 offset,
- u64 length, int status, enum nfs_opnum4 opnum,
- nfs4_stateid *stateid, struct nfs4_deviceid *deviceid)
-{
- bool found = false;
- struct nfs4_ff_layout_ds_err *err;
-
- list_for_each_entry(err, &flo->error_list, list) {
- if (ds_error_can_merge(err, offset, length, status, opnum,
- stateid, deviceid)) {
- found = true;
- extend_ds_error(err, offset, length);
+ /* Do insertion sort w/ merges */
+ list_for_each_entry_safe(err, tmp, &flo->error_list, list) {
+ match = ff_ds_error_match(err, dserr);
+ if (match < 0)
+ continue;
+ if (match > 0) {
+ /* Add entry "dserr" _before_ entry "err" */
+ head = &err->list;
break;
}
+ /* Entries match, so merge "err" into "dserr" */
+ extend_ds_error(dserr, err->offset, err->length);
+ list_del(&err->list);
+ kfree(err);
}
- return found;
+ list_add_tail(&dserr->list, head);
}
int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
@@ -283,7 +275,6 @@
gfp_t gfp_flags)
{
struct nfs4_ff_layout_ds_err *dserr;
- bool needfree;
if (status == 0)
return 0;
@@ -291,14 +282,6 @@
if (mirror->mirror_ds == NULL)
return -EINVAL;
- spin_lock(&flo->generic_hdr.plh_inode->i_lock);
- if (ff_layout_update_ds_error(flo, offset, length, status, opnum,
- &mirror->stateid,
- &mirror->mirror_ds->id_node.deviceid)) {
- spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
- return 0;
- }
- spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
dserr = kmalloc(sizeof(*dserr), gfp_flags);
if (!dserr)
return -ENOMEM;
@@ -313,10 +296,8 @@
NFS4_DEVICEID4_SIZE);
spin_lock(&flo->generic_hdr.plh_inode->i_lock);
- needfree = ff_layout_add_ds_error_locked(flo, dserr);
+ ff_layout_add_ds_error_locked(flo, dserr);
spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
- if (needfree)
- kfree(dserr);
return 0;
}
