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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-18 16:41:18 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-28 16:03:09 -0400
commitb9e028fd89d6834558aa2a5bb30e5cff5c6c1059 (patch)
tree7333094e4b4e388c36bfb7f69683f46ae714051b /fs/nfs/pnfs.c
parentf86bbcf85db32596a0484477d1b8042005709049 (diff)
downloadop-kernel-dev-b9e028fd89d6834558aa2a5bb30e5cff5c6c1059.zip
op-kernel-dev-b9e028fd89d6834558aa2a5bb30e5cff5c6c1059.tar.gz
NFSv4.1: Add helpers for setting/reading the I/O fail bit
...and make them local to the pnfs.c file. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c38
1 files changed, 26 insertions, 12 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index df45aca..f46f9bc 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -238,6 +238,27 @@ pnfs_put_layout_hdr(struct pnfs_layout_hdr *lo)
}
}
+static int
+pnfs_iomode_to_fail_bit(u32 iomode)
+{
+ return iomode == IOMODE_RW ?
+ NFS_LAYOUT_RW_FAILED : NFS_LAYOUT_RO_FAILED;
+}
+
+static void
+pnfs_layout_io_set_failed(struct pnfs_layout_hdr *lo, u32 iomode)
+{
+ set_bit(pnfs_iomode_to_fail_bit(iomode), &lo->plh_flags);
+ dprintk("%s Setting layout IOMODE_%s fail bit\n", __func__,
+ iomode == IOMODE_RW ? "RW" : "READ");
+}
+
+static bool
+pnfs_layout_io_test_failed(struct pnfs_layout_hdr *lo, u32 iomode)
+{
+ return test_bit(pnfs_iomode_to_fail_bit(iomode), &lo->plh_flags) != 0;
+}
+
static void
init_lseg(struct pnfs_layout_hdr *lo, struct pnfs_layout_segment *lseg)
{
@@ -612,7 +633,7 @@ send_layoutget(struct pnfs_layout_hdr *lo,
break;
default:
/* remember that LAYOUTGET failed and suspend trying */
- set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
+ pnfs_layout_io_set_failed(lo, range->iomode);
}
return NULL;
}
@@ -669,8 +690,8 @@ _pnfs_return_layout(struct inode *ino)
lrp = kzalloc(sizeof(*lrp), GFP_KERNEL);
if (unlikely(lrp == NULL)) {
status = -ENOMEM;
- set_bit(NFS_LAYOUT_RW_FAILED, &lo->plh_flags);
- set_bit(NFS_LAYOUT_RO_FAILED, &lo->plh_flags);
+ pnfs_layout_io_set_failed(lo, IOMODE_RW);
+ pnfs_layout_io_set_failed(lo, IOMODE_READ);
pnfs_clear_layout_returned(lo);
pnfs_put_layout_hdr(lo);
goto out;
@@ -1019,7 +1040,6 @@ pnfs_update_layout(struct inode *ino,
.length = count,
};
unsigned pg_offset;
- struct nfs_inode *nfsi = NFS_I(ino);
struct nfs_server *server = NFS_SERVER(ino);
struct nfs_client *clp = server->nfs_client;
struct pnfs_layout_hdr *lo;
@@ -1044,7 +1064,7 @@ pnfs_update_layout(struct inode *ino,
}
/* if LAYOUTGET already failed once we don't try again */
- if (test_bit(lo_fail_bit(iomode), &nfsi->layout->plh_flags))
+ if (pnfs_layout_io_test_failed(lo, iomode))
goto out_unlock;
/* Check to see if the layout for the given range already exists */
@@ -1585,13 +1605,7 @@ static void pnfs_list_write_lseg(struct inode *inode, struct list_head *listp)
void pnfs_set_lo_fail(struct pnfs_layout_segment *lseg)
{
- if (lseg->pls_range.iomode == IOMODE_RW) {
- dprintk("%s Setting layout IOMODE_RW fail bit\n", __func__);
- set_bit(lo_fail_bit(IOMODE_RW), &lseg->pls_layout->plh_flags);
- } else {
- dprintk("%s Setting layout IOMODE_READ fail bit\n", __func__);
- set_bit(lo_fail_bit(IOMODE_READ), &lseg->pls_layout->plh_flags);
- }
+ pnfs_layout_io_set_failed(lseg->pls_layout, lseg->pls_range.iomode);
}
EXPORT_SYMBOL_GPL(pnfs_set_lo_fail);
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