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Diffstat (limited to 'fs/nfs/blocklayout/blocklayout.c')
-rw-r--r--fs/nfs/blocklayout/blocklayout.c94
1 files changed, 87 insertions, 7 deletions
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index 995d707537da..7cb5c38c19e4 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -137,6 +137,11 @@ bl_alloc_init_bio(int npg, struct block_device *bdev, sector_t disk_sector,
return bio;
}
+static bool offset_in_map(u64 offset, struct pnfs_block_dev_map *map)
+{
+ return offset >= map->start && offset < map->start + map->len;
+}
+
static struct bio *
do_add_page_to_bio(struct bio *bio, int npg, int rw, sector_t isect,
struct page *page, struct pnfs_block_dev_map *map,
@@ -156,8 +161,8 @@ do_add_page_to_bio(struct bio *bio, int npg, int rw, sector_t isect,
/* translate to physical disk offset */
disk_addr = (u64)isect << SECTOR_SHIFT;
- if (disk_addr < map->start || disk_addr >= map->start + map->len) {
- if (!dev->map(dev, disk_addr, map))
+ if (!offset_in_map(disk_addr, map)) {
+ if (!dev->map(dev, disk_addr, map) || !offset_in_map(disk_addr, map))
return ERR_PTR(-EIO);
bio = bl_submit_bio(bio);
}
@@ -184,6 +189,29 @@ retry:
return bio;
}
+static void bl_mark_devices_unavailable(struct nfs_pgio_header *header, bool rw)
+{
+ struct pnfs_block_layout *bl = BLK_LSEG2EXT(header->lseg);
+ size_t bytes_left = header->args.count;
+ sector_t isect, extent_length = 0;
+ struct pnfs_block_extent be;
+
+ isect = header->args.offset >> SECTOR_SHIFT;
+ bytes_left += header->args.offset - (isect << SECTOR_SHIFT);
+
+ while (bytes_left > 0) {
+ if (!ext_tree_lookup(bl, isect, &be, rw))
+ return;
+ extent_length = be.be_length - (isect - be.be_f_offset);
+ nfs4_mark_deviceid_unavailable(be.be_device);
+ isect += extent_length;
+ if (bytes_left > extent_length << SECTOR_SHIFT)
+ bytes_left -= extent_length << SECTOR_SHIFT;
+ else
+ bytes_left = 0;
+ }
+}
+
static void bl_end_io_read(struct bio *bio)
{
struct parallel_io *par = bio->bi_private;
@@ -194,6 +222,7 @@ static void bl_end_io_read(struct bio *bio)
if (!header->pnfs_error)
header->pnfs_error = -EIO;
pnfs_set_lo_fail(header->lseg);
+ bl_mark_devices_unavailable(header, false);
}
bio_put(bio);
@@ -323,6 +352,7 @@ static void bl_end_io_write(struct bio *bio)
if (!header->pnfs_error)
header->pnfs_error = -EIO;
pnfs_set_lo_fail(header->lseg);
+ bl_mark_devices_unavailable(header, true);
}
bio_put(bio);
put_parallel(par);
@@ -552,6 +582,31 @@ static int decode_sector_number(__be32 **rp, sector_t *sp)
return 0;
}
+static struct nfs4_deviceid_node *
+bl_find_get_deviceid(struct nfs_server *server,
+ const struct nfs4_deviceid *id, struct rpc_cred *cred,
+ gfp_t gfp_mask)
+{
+ struct nfs4_deviceid_node *node;
+ unsigned long start, end;
+
+retry:
+ node = nfs4_find_get_deviceid(server, id, cred, gfp_mask);
+ if (!node)
+ return ERR_PTR(-ENODEV);
+
+ if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags) == 0)
+ return node;
+
+ end = jiffies;
+ start = end - PNFS_DEVICE_RETRY_TIMEOUT;
+ if (!time_in_range(node->timestamp_unavailable, start, end)) {
+ nfs4_delete_deviceid(node->ld, node->nfs_client, id);
+ goto retry;
+ }
+ return ERR_PTR(-ENODEV);
+}
+
static int
bl_alloc_extent(struct xdr_stream *xdr, struct pnfs_layout_hdr *lo,
struct layout_verification *lv, struct list_head *extents,
@@ -573,16 +628,18 @@ bl_alloc_extent(struct xdr_stream *xdr, struct pnfs_layout_hdr *lo,
memcpy(&id, p, NFS4_DEVICEID4_SIZE);
p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
- error = -EIO;
- be->be_device = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), &id,
+ be->be_device = bl_find_get_deviceid(NFS_SERVER(lo->plh_inode), &id,
lo->plh_lc_cred, gfp_mask);
- if (!be->be_device)
+ if (IS_ERR(be->be_device)) {
+ error = PTR_ERR(be->be_device);
goto out_free_be;
+ }
/*
* The next three values are read in as bytes, but stored in the
* extent structure in 512-byte granularity.
*/
+ error = -EIO;
if (decode_sector_number(&p, &be->be_f_offset) < 0)
goto out_put_deviceid;
if (decode_sector_number(&p, &be->be_length) < 0)
@@ -692,11 +749,16 @@ out_free_scratch:
__free_page(scratch);
out:
dprintk("%s returns %d\n", __func__, status);
- if (status) {
+ switch (status) {
+ case -ENODEV:
+ /* Our extent block devices are unavailable */
+ set_bit(NFS_LSEG_UNAVAILABLE, &lseg->pls_flags);
+ case 0:
+ return lseg;
+ default:
kfree(lseg);
return ERR_PTR(status);
}
- return lseg;
}
static void
@@ -798,6 +860,13 @@ bl_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
}
pnfs_generic_pg_init_read(pgio, req);
+
+ if (pgio->pg_lseg &&
+ test_bit(NFS_LSEG_UNAVAILABLE, &pgio->pg_lseg->pls_flags)) {
+ pnfs_error_mark_layout_for_return(pgio->pg_inode, pgio->pg_lseg);
+ pnfs_set_lo_fail(pgio->pg_lseg);
+ nfs_pageio_reset_read_mds(pgio);
+ }
}
/*
@@ -853,6 +922,14 @@ bl_pg_init_write(struct nfs_pageio_descriptor *pgio, struct nfs_page *req)
wb_size = nfs_dreq_bytes_left(pgio->pg_dreq);
pnfs_generic_pg_init_write(pgio, req, wb_size);
+
+ if (pgio->pg_lseg &&
+ test_bit(NFS_LSEG_UNAVAILABLE, &pgio->pg_lseg->pls_flags)) {
+
+ pnfs_error_mark_layout_for_return(pgio->pg_inode, pgio->pg_lseg);
+ pnfs_set_lo_fail(pgio->pg_lseg);
+ nfs_pageio_reset_write_mds(pgio);
+ }
}
/*
@@ -887,6 +964,7 @@ static struct pnfs_layoutdriver_type blocklayout_type = {
.name = "LAYOUT_BLOCK_VOLUME",
.owner = THIS_MODULE,
.flags = PNFS_LAYOUTRET_ON_SETATTR |
+ PNFS_LAYOUTRET_ON_ERROR |
PNFS_READ_WHOLE_PAGE,
.read_pagelist = bl_read_pagelist,
.write_pagelist = bl_write_pagelist,
@@ -910,6 +988,7 @@ static struct pnfs_layoutdriver_type scsilayout_type = {
.name = "LAYOUT_SCSI",
.owner = THIS_MODULE,
.flags = PNFS_LAYOUTRET_ON_SETATTR |
+ PNFS_LAYOUTRET_ON_ERROR |
PNFS_READ_WHOLE_PAGE,
.read_pagelist = bl_read_pagelist,
.write_pagelist = bl_write_pagelist,
@@ -967,6 +1046,7 @@ static void __exit nfs4blocklayout_exit(void)
}
MODULE_ALIAS("nfs-layouttype4-3");
+MODULE_ALIAS("nfs-layouttype4-5");
module_init(nfs4blocklayout_init);
module_exit(nfs4blocklayout_exit);