diff options
Diffstat (limited to 'fs/nfsd/blocklayoutxdr.c')
-rw-r--r-- | fs/nfsd/blocklayoutxdr.c | 77 |
1 files changed, 72 insertions, 5 deletions
diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c index 6d834dc9bbc8..6c3b316f932e 100644 --- a/fs/nfsd/blocklayoutxdr.c +++ b/fs/nfsd/blocklayoutxdr.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014 Christoph Hellwig. + * Copyright (c) 2014-2016 Christoph Hellwig. */ #include <linux/sunrpc/svc.h> #include <linux/exportfs.h> @@ -53,6 +53,18 @@ nfsd4_block_encode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b) p = xdr_encode_hyper(p, b->simple.offset); p = xdr_encode_opaque(p, b->simple.sig, b->simple.sig_len); break; + case PNFS_BLOCK_VOLUME_SCSI: + len = 4 + 4 + 4 + 4 + b->scsi.designator_len + 8; + p = xdr_reserve_space(xdr, len); + if (!p) + return -ETOOSMALL; + + *p++ = cpu_to_be32(b->type); + *p++ = cpu_to_be32(b->scsi.code_set); + *p++ = cpu_to_be32(b->scsi.designator_type); + p = xdr_encode_opaque(p, b->scsi.designator, b->scsi.designator_len); + p = xdr_encode_hyper(p, b->scsi.pr_key); + break; default: return -ENOTSUPP; } @@ -93,18 +105,22 @@ nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, u32 block_size) { struct iomap *iomaps; - u32 nr_iomaps, expected, i; + u32 nr_iomaps, i; if (len < sizeof(u32)) { dprintk("%s: extent array too small: %u\n", __func__, len); return -EINVAL; } + len -= sizeof(u32); + if (len % PNFS_BLOCK_EXTENT_SIZE) { + dprintk("%s: extent array invalid: %u\n", __func__, len); + return -EINVAL; + } nr_iomaps = be32_to_cpup(p++); - expected = sizeof(__be32) + nr_iomaps * PNFS_BLOCK_EXTENT_SIZE; - if (len != expected) { + if (nr_iomaps != len / PNFS_BLOCK_EXTENT_SIZE) { dprintk("%s: extent array size mismatch: %u/%u\n", - __func__, len, expected); + __func__, len, nr_iomaps); return -EINVAL; } @@ -155,3 +171,54 @@ fail: kfree(iomaps); return -EINVAL; } + +int +nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, + u32 block_size) +{ + struct iomap *iomaps; + u32 nr_iomaps, expected, i; + + if (len < sizeof(u32)) { + dprintk("%s: extent array too small: %u\n", __func__, len); + return -EINVAL; + } + + nr_iomaps = be32_to_cpup(p++); + expected = sizeof(__be32) + nr_iomaps * PNFS_SCSI_RANGE_SIZE; + if (len != expected) { + dprintk("%s: extent array size mismatch: %u/%u\n", + __func__, len, expected); + return -EINVAL; + } + + iomaps = kcalloc(nr_iomaps, sizeof(*iomaps), GFP_KERNEL); + if (!iomaps) { + dprintk("%s: failed to allocate extent array\n", __func__); + return -ENOMEM; + } + + for (i = 0; i < nr_iomaps; i++) { + u64 val; + + p = xdr_decode_hyper(p, &val); + if (val & (block_size - 1)) { + dprintk("%s: unaligned offset 0x%llx\n", __func__, val); + goto fail; + } + iomaps[i].offset = val; + + p = xdr_decode_hyper(p, &val); + if (val & (block_size - 1)) { + dprintk("%s: unaligned length 0x%llx\n", __func__, val); + goto fail; + } + iomaps[i].length = val; + } + + *iomapp = iomaps; + return nr_iomaps; +fail: + kfree(iomaps); + return -EINVAL; +} |