diff options
Diffstat (limited to 'fs/nfs/blocklayout/blocklayout.c')
| -rw-r--r-- | fs/nfs/blocklayout/blocklayout.c | 94 |
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); |