From 40cf446b9482bd2c681b60062b34cc47c78342f8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Mar 2016 20:46:14 +0100 Subject: [PATCH 1/8] nfs4.h: add SCSI layout definitions Based on draft-ietf-nfsv4-scsi-layout-05 after the WG last call. Signed-off-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- include/linux/nfs4.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index d6f9b4e6006d..011433478a14 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -529,6 +529,7 @@ enum pnfs_layouttype { LAYOUT_OSD2_OBJECTS = 2, LAYOUT_BLOCK_VOLUME = 3, LAYOUT_FLEX_FILES = 4, + LAYOUT_SCSI = 5, LAYOUT_TYPE_MAX }; @@ -555,6 +556,7 @@ enum pnfs_block_volume_type { PNFS_BLOCK_VOLUME_SLICE = 1, PNFS_BLOCK_VOLUME_CONCAT = 2, PNFS_BLOCK_VOLUME_STRIPE = 3, + PNFS_BLOCK_VOLUME_SCSI = 4, }; enum pnfs_block_extent_state { @@ -568,6 +570,23 @@ enum pnfs_block_extent_state { #define PNFS_BLOCK_EXTENT_SIZE \ (7 * sizeof(__be32) + NFS4_DEVICEID4_SIZE) +/* on the wire size of a scsi commit range */ +#define PNFS_SCSI_RANGE_SIZE \ + (4 * sizeof(__be32)) + +enum scsi_code_set { + PS_CODE_SET_BINARY = 1, + PS_CODE_SET_ASCII = 2, + PS_CODE_SET_UTF8 = 3 +}; + +enum scsi_designator_type { + PS_DESIGNATOR_T10 = 1, + PS_DESIGNATOR_EUI64 = 2, + PS_DESIGNATOR_NAA = 3, + PS_DESIGNATOR_NAME = 8 +}; + #define NFL4_UFLG_MASK 0x0000003F #define NFL4_UFLG_DENSE 0x00000001 #define NFL4_UFLG_COMMIT_THRU_MDS 0x00000002 From d9186c03976506cde2c2b1219028bed449c948ed Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Mar 2016 20:46:15 +0100 Subject: [PATCH 2/8] nfs/blocklayout: add SCSI layout support This is a trivial extension to the block layout driver to support the new SCSI layouts draft. There are three changes: - device identifcation through the SCSI VPD page. This allows us to directly use the udev generated persistent device names instead of requiring an expensive lookup by crawling every block device node in /dev and reading a signature for it. - use of SCSI persistent reservations to protect device access and allow for robust fencing. On the client sides this just means registering and unregistering a server supplied key. - an optimized LAYOUTCOMMIT payload that doesn't send unessecary fields to the server. Signed-off-by: Christoph Hellwig Acked-by: Trond Myklebust Signed-off-by: J. Bruce Fields --- fs/nfs/blocklayout/blocklayout.c | 61 +++++++++++-- fs/nfs/blocklayout/blocklayout.h | 14 ++- fs/nfs/blocklayout/dev.c | 144 ++++++++++++++++++++++++++++++- fs/nfs/blocklayout/extent_tree.c | 44 +++++++--- fs/nfs/blocklayout/rpc_pipefs.c | 2 +- 5 files changed, 239 insertions(+), 26 deletions(-) diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c index ddd0138f410c..b27c409b2f8e 100644 --- a/fs/nfs/blocklayout/blocklayout.c +++ b/fs/nfs/blocklayout/blocklayout.c @@ -446,8 +446,8 @@ static void bl_free_layout_hdr(struct pnfs_layout_hdr *lo) kfree(bl); } -static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode, - gfp_t gfp_flags) +static struct pnfs_layout_hdr *__bl_alloc_layout_hdr(struct inode *inode, + gfp_t gfp_flags, bool is_scsi_layout) { struct pnfs_block_layout *bl; @@ -460,9 +460,22 @@ static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode, bl->bl_ext_ro = RB_ROOT; spin_lock_init(&bl->bl_ext_lock); + bl->bl_scsi_layout = is_scsi_layout; return &bl->bl_layout; } +static struct pnfs_layout_hdr *bl_alloc_layout_hdr(struct inode *inode, + gfp_t gfp_flags) +{ + return __bl_alloc_layout_hdr(inode, gfp_flags, false); +} + +static struct pnfs_layout_hdr *sl_alloc_layout_hdr(struct inode *inode, + gfp_t gfp_flags) +{ + return __bl_alloc_layout_hdr(inode, gfp_flags, true); +} + static void bl_free_lseg(struct pnfs_layout_segment *lseg) { dprintk("%s enter\n", __func__); @@ -888,22 +901,53 @@ static struct pnfs_layoutdriver_type blocklayout_type = { .sync = pnfs_generic_sync, }; +static struct pnfs_layoutdriver_type scsilayout_type = { + .id = LAYOUT_SCSI, + .name = "LAYOUT_SCSI", + .owner = THIS_MODULE, + .flags = PNFS_LAYOUTRET_ON_SETATTR | + PNFS_READ_WHOLE_PAGE, + .read_pagelist = bl_read_pagelist, + .write_pagelist = bl_write_pagelist, + .alloc_layout_hdr = sl_alloc_layout_hdr, + .free_layout_hdr = bl_free_layout_hdr, + .alloc_lseg = bl_alloc_lseg, + .free_lseg = bl_free_lseg, + .return_range = bl_return_range, + .prepare_layoutcommit = bl_prepare_layoutcommit, + .cleanup_layoutcommit = bl_cleanup_layoutcommit, + .set_layoutdriver = bl_set_layoutdriver, + .alloc_deviceid_node = bl_alloc_deviceid_node, + .free_deviceid_node = bl_free_deviceid_node, + .pg_read_ops = &bl_pg_read_ops, + .pg_write_ops = &bl_pg_write_ops, + .sync = pnfs_generic_sync, +}; + + static int __init nfs4blocklayout_init(void) { int ret; dprintk("%s: NFSv4 Block Layout Driver Registering...\n", __func__); - ret = pnfs_register_layoutdriver(&blocklayout_type); - if (ret) - goto out; ret = bl_init_pipefs(); if (ret) - goto out_unregister; + goto out; + + ret = pnfs_register_layoutdriver(&blocklayout_type); + if (ret) + goto out_cleanup_pipe; + + ret = pnfs_register_layoutdriver(&scsilayout_type); + if (ret) + goto out_unregister_block; return 0; -out_unregister: +out_unregister_block: pnfs_unregister_layoutdriver(&blocklayout_type); +out_cleanup_pipe: + bl_cleanup_pipefs(); out: return ret; } @@ -913,8 +957,9 @@ static void __exit nfs4blocklayout_exit(void) dprintk("%s: NFSv4 Block Layout Driver Unregistering...\n", __func__); - bl_cleanup_pipefs(); + pnfs_unregister_layoutdriver(&scsilayout_type); pnfs_unregister_layoutdriver(&blocklayout_type); + bl_cleanup_pipefs(); } MODULE_ALIAS("nfs-layouttype4-3"); diff --git a/fs/nfs/blocklayout/blocklayout.h b/fs/nfs/blocklayout/blocklayout.h index c556640dcf3b..bc21205309e0 100644 --- a/fs/nfs/blocklayout/blocklayout.h +++ b/fs/nfs/blocklayout/blocklayout.h @@ -55,7 +55,6 @@ struct pnfs_block_dev; */ #define PNFS_BLOCK_UUID_LEN 128 - struct pnfs_block_volume { enum pnfs_block_volume_type type; union { @@ -82,6 +81,13 @@ struct pnfs_block_volume { u32 volumes_count; u32 volumes[PNFS_BLOCK_MAX_DEVICES]; } stripe; + struct { + enum scsi_code_set code_set; + enum scsi_designator_type designator_type; + int designator_len; + u8 designator[256]; + u64 pr_key; + } scsi; }; }; @@ -106,6 +112,9 @@ struct pnfs_block_dev { struct block_device *bdev; u64 disk_offset; + u64 pr_key; + bool pr_registered; + bool (*map)(struct pnfs_block_dev *dev, u64 offset, struct pnfs_block_dev_map *map); }; @@ -131,6 +140,7 @@ struct pnfs_block_layout { struct rb_root bl_ext_rw; struct rb_root bl_ext_ro; spinlock_t bl_ext_lock; /* Protects list manipulation */ + bool bl_scsi_layout; }; static inline struct pnfs_block_layout * @@ -182,6 +192,6 @@ void ext_tree_mark_committed(struct nfs4_layoutcommit_args *arg, int status); dev_t bl_resolve_deviceid(struct nfs_server *server, struct pnfs_block_volume *b, gfp_t gfp_mask); int __init bl_init_pipefs(void); -void __exit bl_cleanup_pipefs(void); +void bl_cleanup_pipefs(void); #endif /* FS_NFS_NFS4BLOCKLAYOUT_H */ diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c index a861bbdfe577..e5b89675263e 100644 --- a/fs/nfs/blocklayout/dev.c +++ b/fs/nfs/blocklayout/dev.c @@ -1,11 +1,12 @@ /* - * Copyright (c) 2014 Christoph Hellwig. + * Copyright (c) 2014-2016 Christoph Hellwig. */ #include #include #include #include #include +#include #include "blocklayout.h" @@ -21,6 +22,17 @@ bl_free_device(struct pnfs_block_dev *dev) bl_free_device(&dev->children[i]); kfree(dev->children); } else { + if (dev->pr_registered) { + const struct pr_ops *ops = + dev->bdev->bd_disk->fops->pr_ops; + int error; + + error = ops->pr_register(dev->bdev, dev->pr_key, 0, + false); + if (error) + pr_err("failed to unregister PR key.\n"); + } + if (dev->bdev) blkdev_put(dev->bdev, FMODE_READ | FMODE_WRITE); } @@ -113,6 +125,24 @@ nfs4_block_decode_volume(struct xdr_stream *xdr, struct pnfs_block_volume *b) for (i = 0; i < b->stripe.volumes_count; i++) b->stripe.volumes[i] = be32_to_cpup(p++); break; + case PNFS_BLOCK_VOLUME_SCSI: + p = xdr_inline_decode(xdr, 4 + 4 + 4); + if (!p) + return -EIO; + b->scsi.code_set = be32_to_cpup(p++); + b->scsi.designator_type = be32_to_cpup(p++); + b->scsi.designator_len = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, b->scsi.designator_len); + if (!p) + return -EIO; + if (b->scsi.designator_len > 256) + return -EIO; + memcpy(&b->scsi.designator, p, b->scsi.designator_len); + p = xdr_inline_decode(xdr, 8); + if (!p) + return -EIO; + p = xdr_decode_hyper(p, &b->scsi.pr_key); + break; default: dprintk("unknown volume type!\n"); return -EIO; @@ -216,6 +246,116 @@ bl_parse_simple(struct nfs_server *server, struct pnfs_block_dev *d, return 0; } +static bool +bl_validate_designator(struct pnfs_block_volume *v) +{ + switch (v->scsi.designator_type) { + case PS_DESIGNATOR_EUI64: + if (v->scsi.code_set != PS_CODE_SET_BINARY) + return false; + + if (v->scsi.designator_len != 8 && + v->scsi.designator_len != 10 && + v->scsi.designator_len != 16) + return false; + + return true; + case PS_DESIGNATOR_NAA: + if (v->scsi.code_set != PS_CODE_SET_BINARY) + return false; + + if (v->scsi.designator_len != 8 && + v->scsi.designator_len != 16) + return false; + + return true; + case PS_DESIGNATOR_T10: + case PS_DESIGNATOR_NAME: + pr_err("pNFS: unsupported designator " + "(code set %d, type %d, len %d.\n", + v->scsi.code_set, + v->scsi.designator_type, + v->scsi.designator_len); + return false; + default: + pr_err("pNFS: invalid designator " + "(code set %d, type %d, len %d.\n", + v->scsi.code_set, + v->scsi.designator_type, + v->scsi.designator_len); + return false; + } +} + +static int +bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d, + struct pnfs_block_volume *volumes, int idx, gfp_t gfp_mask) +{ + struct pnfs_block_volume *v = &volumes[idx]; + const struct pr_ops *ops; + const char *devname; + int error; + + if (!bl_validate_designator(v)) + return -EINVAL; + + switch (v->scsi.designator_len) { + case 8: + devname = kasprintf(GFP_KERNEL, "/dev/disk/by-id/wwn-0x%8phN", + v->scsi.designator); + break; + case 12: + devname = kasprintf(GFP_KERNEL, "/dev/disk/by-id/wwn-0x%12phN", + v->scsi.designator); + break; + case 16: + devname = kasprintf(GFP_KERNEL, "/dev/disk/by-id/wwn-0x%16phN", + v->scsi.designator); + break; + default: + return -EINVAL; + } + + d->bdev = blkdev_get_by_path(devname, FMODE_READ, NULL); + if (IS_ERR(d->bdev)) { + pr_warn("pNFS: failed to open device %s (%ld)\n", + devname, PTR_ERR(d->bdev)); + kfree(devname); + return PTR_ERR(d->bdev); + } + + kfree(devname); + + d->len = i_size_read(d->bdev->bd_inode); + d->map = bl_map_simple; + d->pr_key = v->scsi.pr_key; + + pr_info("pNFS: using block device %s (reservation key 0x%llx)\n", + d->bdev->bd_disk->disk_name, d->pr_key); + + ops = d->bdev->bd_disk->fops->pr_ops; + if (!ops) { + pr_err("pNFS: block device %s does not support reservations.", + d->bdev->bd_disk->disk_name); + error = -EINVAL; + goto out_blkdev_put; + } + + error = ops->pr_register(d->bdev, 0, d->pr_key, true); + if (error) { + pr_err("pNFS: failed to register key for block device %s.", + d->bdev->bd_disk->disk_name); + goto out_blkdev_put; + } + + d->pr_registered = true; + return 0; + +out_blkdev_put: + blkdev_put(d->bdev, FMODE_READ); + return error; +} + static int bl_parse_slice(struct nfs_server *server, struct pnfs_block_dev *d, struct pnfs_block_volume *volumes, int idx, gfp_t gfp_mask) @@ -303,6 +443,8 @@ bl_parse_deviceid(struct nfs_server *server, struct pnfs_block_dev *d, return bl_parse_concat(server, d, volumes, idx, gfp_mask); case PNFS_BLOCK_VOLUME_STRIPE: return bl_parse_stripe(server, d, volumes, idx, gfp_mask); + case PNFS_BLOCK_VOLUME_SCSI: + return bl_parse_scsi(server, d, volumes, idx, gfp_mask); default: dprintk("unsupported volume type: %d\n", volumes[idx].type); return -EIO; diff --git a/fs/nfs/blocklayout/extent_tree.c b/fs/nfs/blocklayout/extent_tree.c index c59a59c37f3d..df366fc68095 100644 --- a/fs/nfs/blocklayout/extent_tree.c +++ b/fs/nfs/blocklayout/extent_tree.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014 Christoph Hellwig. + * Copyright (c) 2014-2016 Christoph Hellwig. */ #include @@ -462,10 +462,12 @@ out: return err; } -static size_t ext_tree_layoutupdate_size(size_t count) +static size_t ext_tree_layoutupdate_size(struct pnfs_block_layout *bl, size_t count) { - return sizeof(__be32) /* number of entries */ + - PNFS_BLOCK_EXTENT_SIZE * count; + if (bl->bl_scsi_layout) + return sizeof(__be32) + PNFS_SCSI_RANGE_SIZE * count; + else + return sizeof(__be32) + PNFS_BLOCK_EXTENT_SIZE * count; } static void ext_tree_free_commitdata(struct nfs4_layoutcommit_args *arg, @@ -482,6 +484,23 @@ static void ext_tree_free_commitdata(struct nfs4_layoutcommit_args *arg, } } +static __be32 *encode_block_extent(struct pnfs_block_extent *be, __be32 *p) +{ + p = xdr_encode_opaque_fixed(p, be->be_device->deviceid.data, + NFS4_DEVICEID4_SIZE); + p = xdr_encode_hyper(p, be->be_f_offset << SECTOR_SHIFT); + p = xdr_encode_hyper(p, be->be_length << SECTOR_SHIFT); + p = xdr_encode_hyper(p, 0LL); + *p++ = cpu_to_be32(PNFS_BLOCK_READWRITE_DATA); + return p; +} + +static __be32 *encode_scsi_range(struct pnfs_block_extent *be, __be32 *p) +{ + p = xdr_encode_hyper(p, be->be_f_offset << SECTOR_SHIFT); + return xdr_encode_hyper(p, be->be_length << SECTOR_SHIFT); +} + static int ext_tree_encode_commit(struct pnfs_block_layout *bl, __be32 *p, size_t buffer_size, size_t *count) { @@ -495,19 +514,16 @@ static int ext_tree_encode_commit(struct pnfs_block_layout *bl, __be32 *p, continue; (*count)++; - if (ext_tree_layoutupdate_size(*count) > buffer_size) { + if (ext_tree_layoutupdate_size(bl, *count) > buffer_size) { /* keep counting.. */ ret = -ENOSPC; continue; } - p = xdr_encode_opaque_fixed(p, be->be_device->deviceid.data, - NFS4_DEVICEID4_SIZE); - p = xdr_encode_hyper(p, be->be_f_offset << SECTOR_SHIFT); - p = xdr_encode_hyper(p, be->be_length << SECTOR_SHIFT); - p = xdr_encode_hyper(p, 0LL); - *p++ = cpu_to_be32(PNFS_BLOCK_READWRITE_DATA); - + if (bl->bl_scsi_layout) + p = encode_scsi_range(be, p); + else + p = encode_block_extent(be, p); be->be_tag = EXTENT_COMMITTING; } spin_unlock(&bl->bl_ext_lock); @@ -536,7 +552,7 @@ retry: if (unlikely(ret)) { ext_tree_free_commitdata(arg, buffer_size); - buffer_size = ext_tree_layoutupdate_size(count); + buffer_size = ext_tree_layoutupdate_size(bl, count); count = 0; arg->layoutupdate_pages = @@ -555,7 +571,7 @@ retry: } *start_p = cpu_to_be32(count); - arg->layoutupdate_len = ext_tree_layoutupdate_size(count); + arg->layoutupdate_len = ext_tree_layoutupdate_size(bl, count); if (unlikely(arg->layoutupdate_pages != &arg->layoutupdate_page)) { void *p = start_p, *end = p + arg->layoutupdate_len; diff --git a/fs/nfs/blocklayout/rpc_pipefs.c b/fs/nfs/blocklayout/rpc_pipefs.c index dbe5839cdeba..9fb067a6f7e0 100644 --- a/fs/nfs/blocklayout/rpc_pipefs.c +++ b/fs/nfs/blocklayout/rpc_pipefs.c @@ -281,7 +281,7 @@ out: return ret; } -void __exit bl_cleanup_pipefs(void) +void bl_cleanup_pipefs(void) { rpc_pipefs_notifier_unregister(&nfs4blocklayout_block); unregister_pernet_subsys(&nfs4blocklayout_net_ops); From 81c39329010d6131c0909ccb91ffeaffc2e99010 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Mar 2016 20:46:16 +0100 Subject: [PATCH 3/8] nfsd: add a new config option for the block layout driver Split the config symbols into a generic pNFS one, which is invisible and gets selected by the layout drivers, and one for the block layout driver. Signed-off-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- fs/nfsd/Kconfig | 13 +++++++++---- fs/nfsd/Makefile | 3 ++- fs/nfsd/nfs4layouts.c | 4 ++++ fs/nfsd/pnfs.h | 2 ++ fs/xfs/Makefile | 2 +- fs/xfs/xfs_export.c | 2 +- fs/xfs/xfs_pnfs.h | 2 +- 7 files changed, 20 insertions(+), 8 deletions(-) diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig index a0b77fc1bd39..eb70d91b255b 100644 --- a/fs/nfsd/Kconfig +++ b/fs/nfsd/Kconfig @@ -84,12 +84,17 @@ config NFSD_V4 If unsure, say N. config NFSD_PNFS - bool "NFSv4.1 server support for Parallel NFS (pNFS)" + bool + +config NFSD_BLOCKLAYOUT + bool "NFSv4.1 server support for pNFS block layouts" depends on NFSD_V4 + select NFSD_PNFS help - This option enables support for the parallel NFS features of the - minor version 1 of the NFSv4 protocol (RFC5661) in the kernel's NFS - server. + This option enables support for the exporting pNFS block layouts + in the kernel's NFS server. The pNFS block layout enables NFS + clients to directly perform I/O to block devices accesible to both + the server and the clients. See RFC 5663 for more details. If unsure, say N. diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile index 9a6028e120c6..679cdc6efee8 100644 --- a/fs/nfsd/Makefile +++ b/fs/nfsd/Makefile @@ -17,4 +17,5 @@ nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \ nfs4acl.o nfs4callback.o nfs4recover.o -nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o blocklayout.o blocklayoutxdr.o +nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o +nfsd-$(CONFIG_NFSD_BLOCKLAYOUT) += blocklayout.o blocklayoutxdr.o diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c index ce2d010d3b17..4e4def77ebc7 100644 --- a/fs/nfsd/nfs4layouts.c +++ b/fs/nfsd/nfs4layouts.c @@ -26,7 +26,9 @@ static const struct nfsd4_callback_ops nfsd4_cb_layout_ops; static const struct lock_manager_operations nfsd4_layouts_lm_ops; const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = { +#ifdef CONFIG_NFSD_BLOCKLAYOUT [LAYOUT_BLOCK_VOLUME] = &bl_layout_ops, +#endif }; /* pNFS device ID to export fsid mapping */ @@ -121,10 +123,12 @@ void nfsd4_setup_layout_type(struct svc_export *exp) if (!(exp->ex_flags & NFSEXP_PNFS)) return; +#ifdef CONFIG_NFSD_BLOCKLAYOUT if (sb->s_export_op->get_uuid && sb->s_export_op->map_blocks && sb->s_export_op->commit_blocks) exp->ex_layout_type = LAYOUT_BLOCK_VOLUME; +#endif } static void diff --git a/fs/nfsd/pnfs.h b/fs/nfsd/pnfs.h index d4c4453674c6..ff50bfa1f76f 100644 --- a/fs/nfsd/pnfs.h +++ b/fs/nfsd/pnfs.h @@ -35,7 +35,9 @@ struct nfsd4_layout_ops { }; extern const struct nfsd4_layout_ops *nfsd4_layout_ops[]; +#ifdef CONFIG_NFSD_BLOCKLAYOUT extern const struct nfsd4_layout_ops bl_layout_ops; +#endif __be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stateid_t *stateid, diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index f64639176670..d68b62a76592 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -121,4 +121,4 @@ xfs-$(CONFIG_XFS_RT) += xfs_rtalloc.o xfs-$(CONFIG_XFS_POSIX_ACL) += xfs_acl.o xfs-$(CONFIG_SYSCTL) += xfs_sysctl.o xfs-$(CONFIG_COMPAT) += xfs_ioctl32.o -xfs-$(CONFIG_NFSD_PNFS) += xfs_pnfs.o +xfs-$(CONFIG_NFSD_BLOCKLAYOUT) += xfs_pnfs.o diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c index 652cd3c5b58c..0492b82281f3 100644 --- a/fs/xfs/xfs_export.c +++ b/fs/xfs/xfs_export.c @@ -246,7 +246,7 @@ const struct export_operations xfs_export_operations = { .fh_to_parent = xfs_fs_fh_to_parent, .get_parent = xfs_fs_get_parent, .commit_metadata = xfs_fs_nfs_commit_metadata, -#ifdef CONFIG_NFSD_PNFS +#ifdef CONFIG_NFSD_BLOCKLAYOUT .get_uuid = xfs_fs_get_uuid, .map_blocks = xfs_fs_map_blocks, .commit_blocks = xfs_fs_commit_blocks, diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h index 8147ac108820..d85529ca299e 100644 --- a/fs/xfs/xfs_pnfs.h +++ b/fs/xfs/xfs_pnfs.h @@ -1,7 +1,7 @@ #ifndef _XFS_PNFS_H #define _XFS_PNFS_H 1 -#ifdef CONFIG_NFSD_PNFS +#ifdef CONFIG_NFSD_BLOCKLAYOUT int xfs_fs_get_uuid(struct super_block *sb, u8 *buf, u32 *len, u64 *offset); int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length, struct iomap *iomap, bool write, u32 *device_generation); From 368248eeb14d08823f1b53de83debd5fd6c108d2 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Mar 2016 20:46:17 +0100 Subject: [PATCH 4/8] nfsd: move some blocklayout code Trivial reorganization, no change in behavior. Move some code around, pull some code out of block layoutcommit that will be useful for the scsi layout. [bfields@redhat.com: split off from "nfsd: add SCSI layout support"] Signed-off-by: J. Bruce Fields --- fs/nfsd/blocklayout.c | 90 ++++++++++++++++++++++++------------------- 1 file changed, 50 insertions(+), 40 deletions(-) diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index c29d9421bd5e..f00fa918e0f6 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -13,37 +13,6 @@ #define NFSDDBG_FACILITY NFSDDBG_PNFS -static int -nfsd4_block_get_device_info_simple(struct super_block *sb, - struct nfsd4_getdeviceinfo *gdp) -{ - struct pnfs_block_deviceaddr *dev; - struct pnfs_block_volume *b; - - dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) + - sizeof(struct pnfs_block_volume), GFP_KERNEL); - if (!dev) - return -ENOMEM; - gdp->gd_device = dev; - - dev->nr_volumes = 1; - b = &dev->volumes[0]; - - b->type = PNFS_BLOCK_VOLUME_SIMPLE; - b->simple.sig_len = PNFS_BLOCK_UUID_LEN; - return sb->s_export_op->get_uuid(sb, b->simple.sig, &b->simple.sig_len, - &b->simple.offset); -} - -static __be32 -nfsd4_block_proc_getdeviceinfo(struct super_block *sb, - struct nfsd4_getdeviceinfo *gdp) -{ - if (sb->s_bdev != sb->s_bdev->bd_contains) - return nfserr_inval; - return nfserrno(nfsd4_block_get_device_info_simple(sb, gdp)); -} - static __be32 nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp, struct nfsd4_layoutget *args) @@ -141,20 +110,13 @@ out_layoutunavailable: } static __be32 -nfsd4_block_proc_layoutcommit(struct inode *inode, - struct nfsd4_layoutcommit *lcp) +nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp, + struct iomap *iomaps, int nr_iomaps) { loff_t new_size = lcp->lc_last_wr + 1; struct iattr iattr = { .ia_valid = 0 }; - struct iomap *iomaps; - int nr_iomaps; int error; - nr_iomaps = nfsd4_block_decode_layoutupdate(lcp->lc_up_layout, - lcp->lc_up_len, &iomaps, 1 << inode->i_blkbits); - if (nr_iomaps < 0) - return nfserrno(nr_iomaps); - if (lcp->lc_mtime.tv_nsec == UTIME_NOW || timespec_compare(&lcp->lc_mtime, &inode->i_mtime) < 0) lcp->lc_mtime = current_fs_time(inode->i_sb); @@ -172,6 +134,53 @@ nfsd4_block_proc_layoutcommit(struct inode *inode, return nfserrno(error); } +#ifdef CONFIG_NFSD_BLOCKLAYOUT +static int +nfsd4_block_get_device_info_simple(struct super_block *sb, + struct nfsd4_getdeviceinfo *gdp) +{ + struct pnfs_block_deviceaddr *dev; + struct pnfs_block_volume *b; + + dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) + + sizeof(struct pnfs_block_volume), GFP_KERNEL); + if (!dev) + return -ENOMEM; + gdp->gd_device = dev; + + dev->nr_volumes = 1; + b = &dev->volumes[0]; + + b->type = PNFS_BLOCK_VOLUME_SIMPLE; + b->simple.sig_len = PNFS_BLOCK_UUID_LEN; + return sb->s_export_op->get_uuid(sb, b->simple.sig, &b->simple.sig_len, + &b->simple.offset); +} + +static __be32 +nfsd4_block_proc_getdeviceinfo(struct super_block *sb, + struct nfsd4_getdeviceinfo *gdp) +{ + if (sb->s_bdev != sb->s_bdev->bd_contains) + return nfserr_inval; + return nfserrno(nfsd4_block_get_device_info_simple(sb, gdp)); +} + +static __be32 +nfsd4_block_proc_layoutcommit(struct inode *inode, + struct nfsd4_layoutcommit *lcp) +{ + struct iomap *iomaps; + int nr_iomaps; + + nr_iomaps = nfsd4_block_decode_layoutupdate(lcp->lc_up_layout, + lcp->lc_up_len, &iomaps, 1 << inode->i_blkbits); + if (nr_iomaps < 0) + return nfserrno(nr_iomaps); + + return nfsd4_block_commit_blocks(inode, lcp, iomaps, nr_iomaps); +} + const struct nfsd4_layout_ops bl_layout_ops = { /* * Pretend that we send notification to the client. This is a blatant @@ -190,3 +199,4 @@ const struct nfsd4_layout_ops bl_layout_ops = { .encode_layoutget = nfsd4_block_encode_layoutget, .proc_layoutcommit = nfsd4_block_proc_layoutcommit, }; +#endif /* CONFIG_NFSD_BLOCKLAYOUT */ From f99d4fbdae6765d0bb4ed5441f6fa1f036122d59 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Fri, 4 Mar 2016 20:46:17 +0100 Subject: [PATCH 5/8] nfsd: add SCSI layout support This is a simple extension to the block layout driver to use SCSI persistent reservations for access control and fencing, as well as SCSI VPD pages for device identification. For this we need to pass the nfs4_client to the proc_getdeviceinfo method to generate the reservation key, and add a new fence_client method to allow for fence actions in the layout driver. Signed-off-by: Christoph Hellwig Signed-off-by: J. Bruce Fields --- .../filesystems/nfs/pnfs-scsi-server.txt | 23 ++ fs/nfsd/Kconfig | 13 ++ fs/nfsd/Makefile | 1 + fs/nfsd/blocklayout.c | 208 +++++++++++++++++- fs/nfsd/blocklayoutxdr.c | 65 +++++- fs/nfsd/blocklayoutxdr.h | 14 ++ fs/nfsd/nfs4layouts.c | 27 ++- fs/nfsd/nfs4proc.c | 6 +- fs/nfsd/pnfs.h | 6 + fs/xfs/Makefile | 1 + fs/xfs/xfs_pnfs.h | 2 +- 11 files changed, 358 insertions(+), 8 deletions(-) create mode 100644 Documentation/filesystems/nfs/pnfs-scsi-server.txt diff --git a/Documentation/filesystems/nfs/pnfs-scsi-server.txt b/Documentation/filesystems/nfs/pnfs-scsi-server.txt new file mode 100644 index 000000000000..5bef7268bd9f --- /dev/null +++ b/Documentation/filesystems/nfs/pnfs-scsi-server.txt @@ -0,0 +1,23 @@ + +pNFS SCSI layout server user guide +================================== + +This document describes support for pNFS SCSI layouts in the Linux NFS server. +With pNFS SCSI layouts, the NFS server acts as Metadata Server (MDS) for pNFS, +which in addition to handling all the metadata access to the NFS export, +also hands out layouts to the clients so that they can directly access the +underlying SCSI LUNs that are shared with the client. + +To use pNFS SCSI layouts with with the Linux NFS server, the exported file +system needs to support the pNFS SCSI layouts (currently just XFS), and the +file system must sit on a SCSI LUN that is accessible to the clients in +addition to the MDS. As of now the file system needs to sit directly on the +exported LUN, striping or concatenation of LUNs on the MDS and clients +is not supported yet. + +On a server built with CONFIG_NFSD_SCSI, the pNFS SCSI volume support is +automatically enabled if the file system is exported using the "pnfs" +option and the underlying SCSI device support persistent reservations. +On the client make sure the kernel has the CONFIG_PNFS_BLOCK option +enabled, and the file system is mounted using the NFSv4.1 protocol +version (mount -o vers=4.1). diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig index eb70d91b255b..a30a31316e68 100644 --- a/fs/nfsd/Kconfig +++ b/fs/nfsd/Kconfig @@ -98,6 +98,19 @@ config NFSD_BLOCKLAYOUT If unsure, say N. +config NFSD_SCSILAYOUT + bool "NFSv4.1 server support for pNFS SCSI layouts" + depends on NFSD_V4 + select NFSD_PNFS + help + This option enables support for the exporting pNFS SCSI layouts + in the kernel's NFS server. The pNFS SCSI layout enables NFS + clients to directly perform I/O to SCSI devices accesible to both + the server and the clients. See draft-ietf-nfsv4-scsi-layout for + more details. + + If unsure, say N. + config NFSD_V4_SECURITY_LABEL bool "Provide Security Label support for NFSv4 server" depends on NFSD_V4 && SECURITY diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile index 679cdc6efee8..3ae5f3c77e28 100644 --- a/fs/nfsd/Makefile +++ b/fs/nfsd/Makefile @@ -19,3 +19,4 @@ nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \ nfs4acl.o nfs4callback.o nfs4recover.o nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o nfsd-$(CONFIG_NFSD_BLOCKLAYOUT) += blocklayout.o blocklayoutxdr.o +nfsd-$(CONFIG_NFSD_SCSILAYOUT) += blocklayout.o blocklayoutxdr.o diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index f00fa918e0f6..e55b5242614d 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -1,11 +1,14 @@ /* - * Copyright (c) 2014 Christoph Hellwig. + * Copyright (c) 2014-2016 Christoph Hellwig. */ #include #include #include +#include #include +#include +#include #include "blocklayoutxdr.h" #include "pnfs.h" @@ -159,6 +162,7 @@ nfsd4_block_get_device_info_simple(struct super_block *sb, static __be32 nfsd4_block_proc_getdeviceinfo(struct super_block *sb, + struct nfs4_client *clp, struct nfsd4_getdeviceinfo *gdp) { if (sb->s_bdev != sb->s_bdev->bd_contains) @@ -200,3 +204,205 @@ const struct nfsd4_layout_ops bl_layout_ops = { .proc_layoutcommit = nfsd4_block_proc_layoutcommit, }; #endif /* CONFIG_NFSD_BLOCKLAYOUT */ + +#ifdef CONFIG_NFSD_SCSILAYOUT +static int nfsd4_scsi_identify_device(struct block_device *bdev, + struct pnfs_block_volume *b) +{ + struct request_queue *q = bdev->bd_disk->queue; + struct request *rq; + size_t bufflen = 252, len, id_len; + u8 *buf, *d, type, assoc; + int error; + + buf = kzalloc(bufflen, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + rq = blk_get_request(q, READ, GFP_KERNEL); + if (IS_ERR(rq)) { + error = -ENOMEM; + goto out_free_buf; + } + blk_rq_set_block_pc(rq); + + error = blk_rq_map_kern(q, rq, buf, bufflen, GFP_KERNEL); + if (error) + goto out_put_request; + + rq->cmd[0] = INQUIRY; + rq->cmd[1] = 1; + rq->cmd[2] = 0x83; + rq->cmd[3] = bufflen >> 8; + rq->cmd[4] = bufflen & 0xff; + rq->cmd_len = COMMAND_SIZE(INQUIRY); + + error = blk_execute_rq(rq->q, NULL, rq, 1); + if (error) { + pr_err("pNFS: INQUIRY 0x83 failed with: %x\n", + rq->errors); + goto out_put_request; + } + + len = (buf[2] << 8) + buf[3] + 4; + if (len > bufflen) { + pr_err("pNFS: INQUIRY 0x83 response invalid (len = %zd)\n", + len); + goto out_put_request; + } + + d = buf + 4; + for (d = buf + 4; d < buf + len; d += id_len + 4) { + id_len = d[3]; + type = d[1] & 0xf; + assoc = (d[1] >> 4) & 0x3; + + /* + * We only care about a EUI-64 and NAA designator types + * with LU association. + */ + if (assoc != 0x00) + continue; + if (type != 0x02 && type != 0x03) + continue; + if (id_len != 8 && id_len != 12 && id_len != 16) + continue; + + b->scsi.code_set = PS_CODE_SET_BINARY; + b->scsi.designator_type = type == 0x02 ? + PS_DESIGNATOR_EUI64 : PS_DESIGNATOR_NAA; + b->scsi.designator_len = id_len; + memcpy(b->scsi.designator, d + 4, id_len); + + /* + * If we found a 8 or 12 byte descriptor continue on to + * see if a 16 byte one is available. If we find a + * 16 byte descriptor we're done. + */ + if (id_len == 16) + break; + } + +out_put_request: + blk_put_request(rq); +out_free_buf: + kfree(buf); + return error; +} + +#define NFSD_MDS_PR_KEY 0x0100000000000000 + +/* + * We use the client ID as a unique key for the reservations. + * This allows us to easily fence a client when recalls fail. + */ +static u64 nfsd4_scsi_pr_key(struct nfs4_client *clp) +{ + return ((u64)clp->cl_clientid.cl_boot << 32) | clp->cl_clientid.cl_id; +} + +static int +nfsd4_block_get_device_info_scsi(struct super_block *sb, + struct nfs4_client *clp, + struct nfsd4_getdeviceinfo *gdp) +{ + struct pnfs_block_deviceaddr *dev; + struct pnfs_block_volume *b; + const struct pr_ops *ops; + int error; + + dev = kzalloc(sizeof(struct pnfs_block_deviceaddr) + + sizeof(struct pnfs_block_volume), GFP_KERNEL); + if (!dev) + return -ENOMEM; + gdp->gd_device = dev; + + dev->nr_volumes = 1; + b = &dev->volumes[0]; + + b->type = PNFS_BLOCK_VOLUME_SCSI; + b->scsi.pr_key = nfsd4_scsi_pr_key(clp); + + error = nfsd4_scsi_identify_device(sb->s_bdev, b); + if (error) + return error; + + ops = sb->s_bdev->bd_disk->fops->pr_ops; + if (!ops) { + pr_err("pNFS: device %s does not support PRs.\n", + sb->s_id); + return -EINVAL; + } + + error = ops->pr_register(sb->s_bdev, 0, NFSD_MDS_PR_KEY, true); + if (error) { + pr_err("pNFS: failed to register key for device %s.\n", + sb->s_id); + return -EINVAL; + } + + error = ops->pr_reserve(sb->s_bdev, NFSD_MDS_PR_KEY, + PR_EXCLUSIVE_ACCESS_REG_ONLY, 0); + if (error) { + pr_err("pNFS: failed to reserve device %s.\n", + sb->s_id); + return -EINVAL; + } + + return 0; +} + +static __be32 +nfsd4_scsi_proc_getdeviceinfo(struct super_block *sb, + struct nfs4_client *clp, + struct nfsd4_getdeviceinfo *gdp) +{ + if (sb->s_bdev != sb->s_bdev->bd_contains) + return nfserr_inval; + return nfserrno(nfsd4_block_get_device_info_scsi(sb, clp, gdp)); +} +static __be32 +nfsd4_scsi_proc_layoutcommit(struct inode *inode, + struct nfsd4_layoutcommit *lcp) +{ + struct iomap *iomaps; + int nr_iomaps; + + nr_iomaps = nfsd4_scsi_decode_layoutupdate(lcp->lc_up_layout, + lcp->lc_up_len, &iomaps, 1 << inode->i_blkbits); + if (nr_iomaps < 0) + return nfserrno(nr_iomaps); + + return nfsd4_block_commit_blocks(inode, lcp, iomaps, nr_iomaps); +} + +static void +nfsd4_scsi_fence_client(struct nfs4_layout_stateid *ls) +{ + struct nfs4_client *clp = ls->ls_stid.sc_client; + struct block_device *bdev = ls->ls_file->f_path.mnt->mnt_sb->s_bdev; + + bdev->bd_disk->fops->pr_ops->pr_preempt(bdev, NFSD_MDS_PR_KEY, + nfsd4_scsi_pr_key(clp), 0, true); +} + +const struct nfsd4_layout_ops scsi_layout_ops = { + /* + * Pretend that we send notification to the client. This is a blatant + * lie to force recent Linux clients to cache our device IDs. + * We rarely ever change the device ID, so the harm of leaking deviceids + * for a while isn't too bad. Unfortunately RFC5661 is a complete mess + * in this regard, but I filed errata 4119 for this a while ago, and + * hopefully the Linux client will eventually start caching deviceids + * without this again. + */ + .notify_types = + NOTIFY_DEVICEID4_DELETE | NOTIFY_DEVICEID4_CHANGE, + .proc_getdeviceinfo = nfsd4_scsi_proc_getdeviceinfo, + .encode_getdeviceinfo = nfsd4_block_encode_getdeviceinfo, + .proc_layoutget = nfsd4_block_proc_layoutget, + .encode_layoutget = nfsd4_block_encode_layoutget, + .proc_layoutcommit = nfsd4_scsi_proc_layoutcommit, + .fence_client = nfsd4_scsi_fence_client, +}; +#endif /* CONFIG_NFSD_SCSILAYOUT */ diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c index 6d834dc9bbc8..ca1883668810 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 #include @@ -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; } @@ -155,3 +167,54 @@ 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; +} diff --git a/fs/nfsd/blocklayoutxdr.h b/fs/nfsd/blocklayoutxdr.h index 6de925fe8499..397bc7563a49 100644 --- a/fs/nfsd/blocklayoutxdr.h +++ b/fs/nfsd/blocklayoutxdr.h @@ -15,6 +15,11 @@ struct pnfs_block_extent { enum pnfs_block_extent_state es; }; +struct pnfs_block_range { + u64 foff; + u64 len; +}; + /* * Random upper cap for the uuid length to avoid unbounded allocation. * Not actually limited by the protocol. @@ -29,6 +34,13 @@ struct pnfs_block_volume { u32 sig_len; u8 sig[PNFS_BLOCK_UUID_LEN]; } simple; + struct { + enum scsi_code_set code_set; + enum scsi_designator_type designator_type; + int designator_len; + u8 designator[256]; + u64 pr_key; + } scsi; }; }; @@ -43,5 +55,7 @@ __be32 nfsd4_block_encode_layoutget(struct xdr_stream *xdr, struct nfsd4_layoutget *lgp); int nfsd4_block_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, u32 block_size); +int nfsd4_scsi_decode_layoutupdate(__be32 *p, u32 len, struct iomap **iomapp, + u32 block_size); #endif /* _NFSD_BLOCKLAYOUTXDR_H */ diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c index 4e4def77ebc7..825c7bc8d789 100644 --- a/fs/nfsd/nfs4layouts.c +++ b/fs/nfsd/nfs4layouts.c @@ -1,6 +1,7 @@ /* * Copyright (c) 2014 Christoph Hellwig. */ +#include #include #include #include @@ -29,6 +30,9 @@ const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = { #ifdef CONFIG_NFSD_BLOCKLAYOUT [LAYOUT_BLOCK_VOLUME] = &bl_layout_ops, #endif +#ifdef CONFIG_NFSD_SCSILAYOUT + [LAYOUT_SCSI] = &scsi_layout_ops, +#endif }; /* pNFS device ID to export fsid mapping */ @@ -123,12 +127,24 @@ void nfsd4_setup_layout_type(struct svc_export *exp) if (!(exp->ex_flags & NFSEXP_PNFS)) return; + /* + * Check if the file system supports exporting a block-like layout. + * If the block device supports reservations prefer the SCSI layout, + * otherwise advertise the block layout. + */ #ifdef CONFIG_NFSD_BLOCKLAYOUT if (sb->s_export_op->get_uuid && sb->s_export_op->map_blocks && sb->s_export_op->commit_blocks) exp->ex_layout_type = LAYOUT_BLOCK_VOLUME; #endif +#ifdef CONFIG_NFSD_SCSILAYOUT + /* overwrite block layout selection if needed */ + if (sb->s_export_op->map_blocks && + sb->s_export_op->commit_blocks && + sb->s_bdev && sb->s_bdev->bd_disk->fops->pr_ops) + exp->ex_layout_type = LAYOUT_SCSI; +#endif } static void @@ -594,8 +610,6 @@ nfsd4_cb_layout_fail(struct nfs4_layout_stateid *ls) rpc_ntop((struct sockaddr *)&clp->cl_addr, addr_str, sizeof(addr_str)); - trace_layout_recall_fail(&ls->ls_stid.sc_stateid); - printk(KERN_WARNING "nfsd: client %s failed to respond to layout recall. " " Fencing..\n", addr_str); @@ -630,6 +644,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task) container_of(cb, struct nfs4_layout_stateid, ls_recall); struct nfsd_net *nn; ktime_t now, cutoff; + const struct nfsd4_layout_ops *ops; LIST_HEAD(reaplist); @@ -665,7 +680,13 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task) /* * Unknown error or non-responding client, we'll need to fence. */ - nfsd4_cb_layout_fail(ls); + trace_layout_recall_fail(&ls->ls_stid.sc_stateid); + + ops = nfsd4_layout_ops[ls->ls_layout_type]; + if (ops->fence_client) + ops->fence_client(ls); + else + nfsd4_cb_layout_fail(ls); return -1; } } diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 40b912407d51..de1ff1d98bb1 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1268,8 +1268,10 @@ nfsd4_getdeviceinfo(struct svc_rqst *rqstp, goto out; nfserr = nfs_ok; - if (gdp->gd_maxcount != 0) - nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); + if (gdp->gd_maxcount != 0) { + nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, + cstate->session->se_client, gdp); + } gdp->gd_notify_types &= ops->notify_types; out: diff --git a/fs/nfsd/pnfs.h b/fs/nfsd/pnfs.h index ff50bfa1f76f..7d073b9b1553 100644 --- a/fs/nfsd/pnfs.h +++ b/fs/nfsd/pnfs.h @@ -21,6 +21,7 @@ struct nfsd4_layout_ops { u32 notify_types; __be32 (*proc_getdeviceinfo)(struct super_block *sb, + struct nfs4_client *clp, struct nfsd4_getdeviceinfo *gdevp); __be32 (*encode_getdeviceinfo)(struct xdr_stream *xdr, struct nfsd4_getdeviceinfo *gdevp); @@ -32,12 +33,17 @@ struct nfsd4_layout_ops { __be32 (*proc_layoutcommit)(struct inode *inode, struct nfsd4_layoutcommit *lcp); + + void (*fence_client)(struct nfs4_layout_stateid *ls); }; extern const struct nfsd4_layout_ops *nfsd4_layout_ops[]; #ifdef CONFIG_NFSD_BLOCKLAYOUT extern const struct nfsd4_layout_ops bl_layout_ops; #endif +#ifdef CONFIG_NFSD_SCSILAYOUT +extern const struct nfsd4_layout_ops scsi_layout_ops; +#endif __be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, stateid_t *stateid, diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile index d68b62a76592..3542d94fddce 100644 --- a/fs/xfs/Makefile +++ b/fs/xfs/Makefile @@ -122,3 +122,4 @@ xfs-$(CONFIG_XFS_POSIX_ACL) += xfs_acl.o xfs-$(CONFIG_SYSCTL) += xfs_sysctl.o xfs-$(CONFIG_COMPAT) += xfs_ioctl32.o xfs-$(CONFIG_NFSD_BLOCKLAYOUT) += xfs_pnfs.o +xfs-$(CONFIG_NFSD_SCSILAYOUT) += xfs_pnfs.o diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h index d85529ca299e..93f74853961b 100644 --- a/fs/xfs/xfs_pnfs.h +++ b/fs/xfs/xfs_pnfs.h @@ -1,7 +1,7 @@ #ifndef _XFS_PNFS_H #define _XFS_PNFS_H 1 -#ifdef CONFIG_NFSD_BLOCKLAYOUT +#if defined(CONFIG_NFSD_BLOCKLAYOUT) || defined(CONFIG_NFSD_SCSILAYOUT) int xfs_fs_get_uuid(struct super_block *sb, u8 *buf, u32 *len, u64 *offset); int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length, struct iomap *iomap, bool write, u32 *device_generation); From 10c4de10b2624ab9d83bd8e708d39a1867302a6a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 9 Mar 2016 15:43:27 +0100 Subject: [PATCH 6/8] nfsd: block and scsi layout drivers need to depend on CONFIG_BLOCK Signed-off-by: Christoph Hellwig Reported-by: Randy Dunlap Signed-off-by: J. Bruce Fields --- fs/nfsd/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig index a30a31316e68..c9f583d7bac8 100644 --- a/fs/nfsd/Kconfig +++ b/fs/nfsd/Kconfig @@ -88,7 +88,7 @@ config NFSD_PNFS config NFSD_BLOCKLAYOUT bool "NFSv4.1 server support for pNFS block layouts" - depends on NFSD_V4 + depends on NFSD_V4 && BLOCK select NFSD_PNFS help This option enables support for the exporting pNFS block layouts @@ -100,7 +100,7 @@ config NFSD_BLOCKLAYOUT config NFSD_SCSILAYOUT bool "NFSv4.1 server support for pNFS SCSI layouts" - depends on NFSD_V4 + depends on NFSD_V4 && BLOCK select NFSD_PNFS help This option enables support for the exporting pNFS SCSI layouts From 4b15da44e742871206582f6aa2997b009648f02f Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Fri, 18 Mar 2016 11:31:17 -0400 Subject: [PATCH 7/8] nfsd: better layoutupdate bounds-checking You could add any multiple of 2^32/PNFS_SCSI_RANGE_SIZE to nr_iomaps and still pass this check. You'd probably still fail the following kcalloc, but best to be paranoid since this is from-the-wire data. Signed-off-by: J. Bruce Fields --- fs/nfsd/blocklayoutxdr.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/fs/nfsd/blocklayoutxdr.c b/fs/nfsd/blocklayoutxdr.c index ca1883668810..6c3b316f932e 100644 --- a/fs/nfsd/blocklayoutxdr.c +++ b/fs/nfsd/blocklayoutxdr.c @@ -105,18 +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; } From ac503e4a309a3993a069750f95c2815ee5db5aa5 Mon Sep 17 00:00:00 2001 From: Benjamin Coddington Date: Tue, 22 Mar 2016 10:28:36 -0400 Subject: [PATCH 8/8] nfsd: use short read as well as i_size to set eof Use the result of a local read to determine when to set the eof flag. This allows us to return the location of the end of the file atomically at the time of the read. Signed-off-by: Benjamin Coddington [bfields: add some documentation] Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs3proc.c | 7 ++++--- fs/nfsd/nfs4xdr.c | 11 +++++++---- fs/nfsd/vfs.h | 19 +++++++++++++++++++ 3 files changed, 30 insertions(+), 7 deletions(-) diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c index 7b755b7f785c..51c3b06e8036 100644 --- a/fs/nfsd/nfs3proc.c +++ b/fs/nfsd/nfs3proc.c @@ -147,6 +147,7 @@ nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp, { __be32 nfserr; u32 max_blocksize = svc_max_payload(rqstp); + unsigned long cnt = min(argp->count, max_blocksize); dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n", SVCFH_fmt(&argp->fh), @@ -157,7 +158,7 @@ nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp, * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof) * + 1 (xdr opaque byte count) = 26 */ - resp->count = min(argp->count, max_blocksize); + resp->count = cnt; svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4); fh_copy(&resp->fh, &argp->fh); @@ -167,8 +168,8 @@ nfsd3_proc_read(struct svc_rqst *rqstp, struct nfsd3_readargs *argp, &resp->count); if (nfserr == 0) { struct inode *inode = d_inode(resp->fh.fh_dentry); - - resp->eof = (argp->offset + resp->count) >= inode->i_size; + resp->eof = nfsd_eof_on_read(cnt, resp->count, argp->offset, + inode->i_size); } RETURN_STATUS(nfserr); diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index aa87954b4af2..9df898ba648f 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -3365,6 +3365,7 @@ static __be32 nfsd4_encode_splice_read( struct xdr_stream *xdr = &resp->xdr; struct xdr_buf *buf = xdr->buf; u32 eof; + long len; int space_left; __be32 nfserr; __be32 *p = xdr->p - 2; @@ -3373,6 +3374,7 @@ static __be32 nfsd4_encode_splice_read( if (xdr->end - xdr->p < 1) return nfserr_resource; + len = maxcount; nfserr = nfsd_splice_read(read->rd_rqstp, file, read->rd_offset, &maxcount); if (nfserr) { @@ -3385,8 +3387,8 @@ static __be32 nfsd4_encode_splice_read( return nfserr; } - eof = (read->rd_offset + maxcount >= - d_inode(read->rd_fhp->fh_dentry)->i_size); + eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, + d_inode(read->rd_fhp->fh_dentry)->i_size); *(p++) = htonl(eof); *(p++) = htonl(maxcount); @@ -3456,14 +3458,15 @@ static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, } read->rd_vlen = v; + len = maxcount; nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, &maxcount); if (nfserr) return nfserr; xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); - eof = (read->rd_offset + maxcount >= - d_inode(read->rd_fhp->fh_dentry)->i_size); + eof = nfsd_eof_on_read(len, maxcount, read->rd_offset, + d_inode(read->rd_fhp->fh_dentry)->i_size); tmp = htonl(eof); write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index c11ba316f23f..2d573ec057f8 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -139,4 +139,23 @@ static inline int nfsd_create_is_exclusive(int createmode) || createmode == NFS4_CREATE_EXCLUSIVE4_1; } +static inline bool nfsd_eof_on_read(long requested, long read, + loff_t offset, loff_t size) +{ + /* We assume a short read means eof: */ + if (requested > read) + return true; + /* + * A non-short read might also reach end of file. The spec + * still requires us to set eof in that case. + * + * Further operations may have modified the file size since + * the read, so the following check is not atomic with the read. + * We've only seen that cause a problem for a client in the case + * where the read returned a count of 0 without setting eof. + * That case was fixed by the addition of the above check. + */ + return (offset + read >= size); +} + #endif /* LINUX_NFSD_VFS_H */