* [PATCH 1/4] nfsd/blocklayout: always ignore loca_time_modify
2026-04-23 18:15 [PATCH 0/4] cleanup block-style layouts exports v3 Chuck Lever
@ 2026-04-23 18:15 ` Chuck Lever
2026-04-23 18:15 ` [PATCH] NFSD: Put cache get-reqs dump attrs under reply Chuck Lever
` (3 subsequent siblings)
4 siblings, 0 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:15 UTC (permalink / raw)
To: Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Christoph Hellwig
From: Christoph Hellwig <hch@lst.de>
RFC 8881 Section 18.42 makes it clear that the client provided timestamp
is a "may" condition, and clients that want to force a specific timestamp
should send a separate SETATTR in the compound.
Since commit b82f92d5dd1a ("fs: have setattr_copy handle multigrain
timestamps appropriately") the ia_mtime value is ignored by file
systems using multi-grain timestamps like XFS, which is the only
file system supporting blocklayout exports right now, so make that
explicit in NFSD as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/blocklayout.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 9d829c84f374..24cc5025f649 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -179,15 +179,20 @@ static __be32
nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp,
struct iomap *iomaps, int nr_iomaps)
{
- struct timespec64 mtime = inode_get_mtime(inode);
struct iattr iattr = { .ia_valid = 0 };
int error;
- if (lcp->lc_mtime.tv_nsec == UTIME_NOW ||
- timespec64_compare(&lcp->lc_mtime, &mtime) < 0)
- lcp->lc_mtime = current_time(inode);
+ /*
+ * This ignores the client provided mtime in loca_time_modify, as a
+ * fully client specified mtime doesn't really fit into the Linux
+ * multi-grain timestamp architecture.
+ *
+ * RFC 8881 Section 18.42 makes it clear that the client provided
+ * timestamp is a "may" condition, and clients that want to force a
+ * specific timestamp should send a separate SETATTR in the compound.
+ */
iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
- iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = lcp->lc_mtime;
+ iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = current_time(inode);
if (lcp->lc_size_chg) {
iattr.ia_valid |= ATTR_SIZE;
--
2.53.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH] NFSD: Put cache get-reqs dump attrs under reply
2026-04-23 18:15 [PATCH 0/4] cleanup block-style layouts exports v3 Chuck Lever
2026-04-23 18:15 ` [PATCH 1/4] nfsd/blocklayout: always ignore loca_time_modify Chuck Lever
@ 2026-04-23 18:15 ` Chuck Lever
2026-04-23 18:16 ` Chuck Lever
2026-04-23 18:18 ` Jeff Layton
2026-04-23 18:15 ` [PATCH 2/4] exportfs: split out the ops for layout-based block device access Chuck Lever
` (2 subsequent siblings)
4 siblings, 2 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:15 UTC (permalink / raw)
To: Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Chuck Lever, Thorsten Leemhuis
From: Chuck Lever <chuck.lever@oracle.com>
The new get-reqs dump operations added to sunrpc_cache.yaml and
nfsd.yaml place the "requests" nested attribute under dump.request.
A netlink dump carries an empty request; its payload travels back
in the reply. Because the spec names no reply attributes, the YNL
C code generator synthesizes a forward reference to a
<op>_rsp struct that is never defined, breaking any consumer of
these specs.
This first surfaced when Thorsten Leemhuis built tools/net/ynl
against -next:
nfsd-user.h:746: error: field 'obj' has incomplete type
struct nfsd_svc_export_get_reqs_rsp obj ...
nfsd-user.h:826: error: field 'obj' has incomplete type
struct nfsd_expkey_get_reqs_rsp obj ...
nfsd-user.c:1211: error: 'nfsd_svc_export_get_reqs_rsp_parse'
undeclared
sunrpc_cache.yaml has the same defect in ip-map-get-reqs and
unix-gid-get-reqs, but nfsd.yaml errors out first in the Makefile's
alphabetical build order and hides the sunrpc failures.
These bugs were introduced by incorrect merge conflict resolution.
Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
Closes: https://lore.kernel.org/linux-nfs/f6a3ca6d-e5cb-4a5c-9af2-8d2b1ce33ef0@leemhuis.info/
Fixes: 1045ccf519ce30 ("sunrpc: add netlink upcall for the auth.unix.ip cache")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
Documentation/netlink/specs/nfsd.yaml | 4 +--
Documentation/netlink/specs/sunrpc_cache.yaml | 4 +--
fs/nfsd/netlink.c | 26 +++++--------------
net/sunrpc/netlink.c | 26 +++++--------------
4 files changed, 16 insertions(+), 44 deletions(-)
diff --git a/Documentation/netlink/specs/nfsd.yaml b/Documentation/netlink/specs/nfsd.yaml
index 17e714ef683d..8f36fadd68f7 100644
--- a/Documentation/netlink/specs/nfsd.yaml
+++ b/Documentation/netlink/specs/nfsd.yaml
@@ -445,7 +445,7 @@ operations:
attribute-set: svc-export-reqs
flags: [admin-perm]
dump:
- request:
+ reply:
attributes:
- requests
-
@@ -463,7 +463,7 @@ operations:
attribute-set: expkey-reqs
flags: [admin-perm]
dump:
- request:
+ reply:
attributes:
- requests
-
diff --git a/Documentation/netlink/specs/sunrpc_cache.yaml b/Documentation/netlink/specs/sunrpc_cache.yaml
index 55dabc914dbc..f22ff22b9418 100644
--- a/Documentation/netlink/specs/sunrpc_cache.yaml
+++ b/Documentation/netlink/specs/sunrpc_cache.yaml
@@ -101,7 +101,7 @@ operations:
attribute-set: ip-map-reqs
flags: [admin-perm]
dump:
- request:
+ reply:
attributes:
- requests
-
@@ -119,7 +119,7 @@ operations:
attribute-set: unix-gid-reqs
flags: [admin-perm]
dump:
- request:
+ reply:
attributes:
- requests
-
diff --git a/fs/nfsd/netlink.c b/fs/nfsd/netlink.c
index df5b0e2fb286..fbee3676d253 100644
--- a/fs/nfsd/netlink.c
+++ b/fs/nfsd/netlink.c
@@ -88,21 +88,11 @@ static const struct nla_policy nfsd_pool_mode_set_nl_policy[NFSD_A_POOL_MODE_MOD
[NFSD_A_POOL_MODE_MODE] = { .type = NLA_NUL_STRING, },
};
-/* NFSD_CMD_SVC_EXPORT_GET_REQS - dump */
-static const struct nla_policy nfsd_svc_export_get_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
- [NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
-};
-
/* NFSD_CMD_SVC_EXPORT_SET_REQS - do */
static const struct nla_policy nfsd_svc_export_set_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
[NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
};
-/* NFSD_CMD_EXPKEY_GET_REQS - dump */
-static const struct nla_policy nfsd_expkey_get_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
- [NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
-};
-
/* NFSD_CMD_EXPKEY_SET_REQS - do */
static const struct nla_policy nfsd_expkey_set_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
[NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
@@ -184,11 +174,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
.flags = GENL_CMD_CAP_DO,
},
{
- .cmd = NFSD_CMD_SVC_EXPORT_GET_REQS,
- .dumpit = nfsd_nl_svc_export_get_reqs_dumpit,
- .policy = nfsd_svc_export_get_reqs_nl_policy,
- .maxattr = NFSD_A_SVC_EXPORT_REQS_REQUESTS,
- .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+ .cmd = NFSD_CMD_SVC_EXPORT_GET_REQS,
+ .dumpit = nfsd_nl_svc_export_get_reqs_dumpit,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
},
{
.cmd = NFSD_CMD_SVC_EXPORT_SET_REQS,
@@ -198,11 +186,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
},
{
- .cmd = NFSD_CMD_EXPKEY_GET_REQS,
- .dumpit = nfsd_nl_expkey_get_reqs_dumpit,
- .policy = nfsd_expkey_get_reqs_nl_policy,
- .maxattr = NFSD_A_EXPKEY_REQS_REQUESTS,
- .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+ .cmd = NFSD_CMD_EXPKEY_GET_REQS,
+ .dumpit = nfsd_nl_expkey_get_reqs_dumpit,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
},
{
.cmd = NFSD_CMD_EXPKEY_SET_REQS,
diff --git a/net/sunrpc/netlink.c b/net/sunrpc/netlink.c
index 5ccf0967809c..ce09ecc0faa2 100644
--- a/net/sunrpc/netlink.c
+++ b/net/sunrpc/netlink.c
@@ -29,21 +29,11 @@ const struct nla_policy sunrpc_unix_gid_nl_policy[SUNRPC_A_UNIX_GID_EXPIRY + 1]
[SUNRPC_A_UNIX_GID_EXPIRY] = { .type = NLA_U64, },
};
-/* SUNRPC_CMD_IP_MAP_GET_REQS - dump */
-static const struct nla_policy sunrpc_ip_map_get_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
- [SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
-};
-
/* SUNRPC_CMD_IP_MAP_SET_REQS - do */
static const struct nla_policy sunrpc_ip_map_set_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
[SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
};
-/* SUNRPC_CMD_UNIX_GID_GET_REQS - dump */
-static const struct nla_policy sunrpc_unix_gid_get_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
- [SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
-};
-
/* SUNRPC_CMD_UNIX_GID_SET_REQS - do */
static const struct nla_policy sunrpc_unix_gid_set_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
[SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
@@ -57,11 +47,9 @@ static const struct nla_policy sunrpc_cache_flush_nl_policy[SUNRPC_A_CACHE_FLUSH
/* Ops table for sunrpc */
static const struct genl_split_ops sunrpc_nl_ops[] = {
{
- .cmd = SUNRPC_CMD_IP_MAP_GET_REQS,
- .dumpit = sunrpc_nl_ip_map_get_reqs_dumpit,
- .policy = sunrpc_ip_map_get_reqs_nl_policy,
- .maxattr = SUNRPC_A_IP_MAP_REQS_REQUESTS,
- .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+ .cmd = SUNRPC_CMD_IP_MAP_GET_REQS,
+ .dumpit = sunrpc_nl_ip_map_get_reqs_dumpit,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
},
{
.cmd = SUNRPC_CMD_IP_MAP_SET_REQS,
@@ -71,11 +59,9 @@ static const struct genl_split_ops sunrpc_nl_ops[] = {
.flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
},
{
- .cmd = SUNRPC_CMD_UNIX_GID_GET_REQS,
- .dumpit = sunrpc_nl_unix_gid_get_reqs_dumpit,
- .policy = sunrpc_unix_gid_get_reqs_nl_policy,
- .maxattr = SUNRPC_A_UNIX_GID_REQS_REQUESTS,
- .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
+ .cmd = SUNRPC_CMD_UNIX_GID_GET_REQS,
+ .dumpit = sunrpc_nl_unix_gid_get_reqs_dumpit,
+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
},
{
.cmd = SUNRPC_CMD_UNIX_GID_SET_REQS,
--
2.53.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH] NFSD: Put cache get-reqs dump attrs under reply
2026-04-23 18:15 ` [PATCH] NFSD: Put cache get-reqs dump attrs under reply Chuck Lever
@ 2026-04-23 18:16 ` Chuck Lever
2026-04-23 18:18 ` Jeff Layton
1 sibling, 0 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:16 UTC (permalink / raw)
To: Chuck Lever, Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Thorsten Leemhuis
On 4/23/26 11:15 AM, Chuck Lever wrote:
> From: Chuck Lever <chuck.lever@oracle.com>
Damn it. Ignore this, I will try again.
--
Chuck Lever
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH] NFSD: Put cache get-reqs dump attrs under reply
2026-04-23 18:15 ` [PATCH] NFSD: Put cache get-reqs dump attrs under reply Chuck Lever
2026-04-23 18:16 ` Chuck Lever
@ 2026-04-23 18:18 ` Jeff Layton
1 sibling, 0 replies; 8+ messages in thread
From: Jeff Layton @ 2026-04-23 18:18 UTC (permalink / raw)
To: Chuck Lever, Christian Brauner
Cc: NeilBrown, Olga Kornievskaia, Dai Ngo, Tom Talpey, linux-nfs,
Chuck Lever, Thorsten Leemhuis
On Thu, 2026-04-23 at 14:15 -0400, Chuck Lever wrote:
> From: Chuck Lever <chuck.lever@oracle.com>
>
> The new get-reqs dump operations added to sunrpc_cache.yaml and
> nfsd.yaml place the "requests" nested attribute under dump.request.
> A netlink dump carries an empty request; its payload travels back
> in the reply. Because the spec names no reply attributes, the YNL
> C code generator synthesizes a forward reference to a
> <op>_rsp struct that is never defined, breaking any consumer of
> these specs.
>
> This first surfaced when Thorsten Leemhuis built tools/net/ynl
> against -next:
>
> nfsd-user.h:746: error: field 'obj' has incomplete type
> struct nfsd_svc_export_get_reqs_rsp obj ...
> nfsd-user.h:826: error: field 'obj' has incomplete type
> struct nfsd_expkey_get_reqs_rsp obj ...
> nfsd-user.c:1211: error: 'nfsd_svc_export_get_reqs_rsp_parse'
> undeclared
>
> sunrpc_cache.yaml has the same defect in ip-map-get-reqs and
> unix-gid-get-reqs, but nfsd.yaml errors out first in the Makefile's
> alphabetical build order and hides the sunrpc failures.
>
> These bugs were introduced by incorrect merge conflict resolution.
>
> Reported-by: Thorsten Leemhuis <linux@leemhuis.info>
> Closes: https://lore.kernel.org/linux-nfs/f6a3ca6d-e5cb-4a5c-9af2-8d2b1ce33ef0@leemhuis.info/
> Fixes: 1045ccf519ce30 ("sunrpc: add netlink upcall for the auth.unix.ip cache")
> Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
> ---
> Documentation/netlink/specs/nfsd.yaml | 4 +--
> Documentation/netlink/specs/sunrpc_cache.yaml | 4 +--
> fs/nfsd/netlink.c | 26 +++++--------------
> net/sunrpc/netlink.c | 26 +++++--------------
> 4 files changed, 16 insertions(+), 44 deletions(-)
>
> diff --git a/Documentation/netlink/specs/nfsd.yaml b/Documentation/netlink/specs/nfsd.yaml
> index 17e714ef683d..8f36fadd68f7 100644
> --- a/Documentation/netlink/specs/nfsd.yaml
> +++ b/Documentation/netlink/specs/nfsd.yaml
> @@ -445,7 +445,7 @@ operations:
> attribute-set: svc-export-reqs
> flags: [admin-perm]
> dump:
> - request:
> + reply:
> attributes:
> - requests
> -
> @@ -463,7 +463,7 @@ operations:
> attribute-set: expkey-reqs
> flags: [admin-perm]
> dump:
> - request:
> + reply:
> attributes:
> - requests
> -
> diff --git a/Documentation/netlink/specs/sunrpc_cache.yaml b/Documentation/netlink/specs/sunrpc_cache.yaml
> index 55dabc914dbc..f22ff22b9418 100644
> --- a/Documentation/netlink/specs/sunrpc_cache.yaml
> +++ b/Documentation/netlink/specs/sunrpc_cache.yaml
> @@ -101,7 +101,7 @@ operations:
> attribute-set: ip-map-reqs
> flags: [admin-perm]
> dump:
> - request:
> + reply:
> attributes:
> - requests
> -
> @@ -119,7 +119,7 @@ operations:
> attribute-set: unix-gid-reqs
> flags: [admin-perm]
> dump:
> - request:
> + reply:
> attributes:
> - requests
> -
> diff --git a/fs/nfsd/netlink.c b/fs/nfsd/netlink.c
> index df5b0e2fb286..fbee3676d253 100644
> --- a/fs/nfsd/netlink.c
> +++ b/fs/nfsd/netlink.c
> @@ -88,21 +88,11 @@ static const struct nla_policy nfsd_pool_mode_set_nl_policy[NFSD_A_POOL_MODE_MOD
> [NFSD_A_POOL_MODE_MODE] = { .type = NLA_NUL_STRING, },
> };
>
> -/* NFSD_CMD_SVC_EXPORT_GET_REQS - dump */
> -static const struct nla_policy nfsd_svc_export_get_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
> - [NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
> -};
> -
> /* NFSD_CMD_SVC_EXPORT_SET_REQS - do */
> static const struct nla_policy nfsd_svc_export_set_reqs_nl_policy[NFSD_A_SVC_EXPORT_REQS_REQUESTS + 1] = {
> [NFSD_A_SVC_EXPORT_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_svc_export_nl_policy),
> };
>
> -/* NFSD_CMD_EXPKEY_GET_REQS - dump */
> -static const struct nla_policy nfsd_expkey_get_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
> - [NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
> -};
> -
> /* NFSD_CMD_EXPKEY_SET_REQS - do */
> static const struct nla_policy nfsd_expkey_set_reqs_nl_policy[NFSD_A_EXPKEY_REQS_REQUESTS + 1] = {
> [NFSD_A_EXPKEY_REQS_REQUESTS] = NLA_POLICY_NESTED(nfsd_expkey_nl_policy),
> @@ -184,11 +174,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
> .flags = GENL_CMD_CAP_DO,
> },
> {
> - .cmd = NFSD_CMD_SVC_EXPORT_GET_REQS,
> - .dumpit = nfsd_nl_svc_export_get_reqs_dumpit,
> - .policy = nfsd_svc_export_get_reqs_nl_policy,
> - .maxattr = NFSD_A_SVC_EXPORT_REQS_REQUESTS,
> - .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> + .cmd = NFSD_CMD_SVC_EXPORT_GET_REQS,
> + .dumpit = nfsd_nl_svc_export_get_reqs_dumpit,
> + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> },
> {
> .cmd = NFSD_CMD_SVC_EXPORT_SET_REQS,
> @@ -198,11 +186,9 @@ static const struct genl_split_ops nfsd_nl_ops[] = {
> .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
> },
> {
> - .cmd = NFSD_CMD_EXPKEY_GET_REQS,
> - .dumpit = nfsd_nl_expkey_get_reqs_dumpit,
> - .policy = nfsd_expkey_get_reqs_nl_policy,
> - .maxattr = NFSD_A_EXPKEY_REQS_REQUESTS,
> - .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> + .cmd = NFSD_CMD_EXPKEY_GET_REQS,
> + .dumpit = nfsd_nl_expkey_get_reqs_dumpit,
> + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> },
> {
> .cmd = NFSD_CMD_EXPKEY_SET_REQS,
> diff --git a/net/sunrpc/netlink.c b/net/sunrpc/netlink.c
> index 5ccf0967809c..ce09ecc0faa2 100644
> --- a/net/sunrpc/netlink.c
> +++ b/net/sunrpc/netlink.c
> @@ -29,21 +29,11 @@ const struct nla_policy sunrpc_unix_gid_nl_policy[SUNRPC_A_UNIX_GID_EXPIRY + 1]
> [SUNRPC_A_UNIX_GID_EXPIRY] = { .type = NLA_U64, },
> };
>
> -/* SUNRPC_CMD_IP_MAP_GET_REQS - dump */
> -static const struct nla_policy sunrpc_ip_map_get_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
> - [SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
> -};
> -
> /* SUNRPC_CMD_IP_MAP_SET_REQS - do */
> static const struct nla_policy sunrpc_ip_map_set_reqs_nl_policy[SUNRPC_A_IP_MAP_REQS_REQUESTS + 1] = {
> [SUNRPC_A_IP_MAP_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_ip_map_nl_policy),
> };
>
> -/* SUNRPC_CMD_UNIX_GID_GET_REQS - dump */
> -static const struct nla_policy sunrpc_unix_gid_get_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
> - [SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
> -};
> -
> /* SUNRPC_CMD_UNIX_GID_SET_REQS - do */
> static const struct nla_policy sunrpc_unix_gid_set_reqs_nl_policy[SUNRPC_A_UNIX_GID_REQS_REQUESTS + 1] = {
> [SUNRPC_A_UNIX_GID_REQS_REQUESTS] = NLA_POLICY_NESTED(sunrpc_unix_gid_nl_policy),
> @@ -57,11 +47,9 @@ static const struct nla_policy sunrpc_cache_flush_nl_policy[SUNRPC_A_CACHE_FLUSH
> /* Ops table for sunrpc */
> static const struct genl_split_ops sunrpc_nl_ops[] = {
> {
> - .cmd = SUNRPC_CMD_IP_MAP_GET_REQS,
> - .dumpit = sunrpc_nl_ip_map_get_reqs_dumpit,
> - .policy = sunrpc_ip_map_get_reqs_nl_policy,
> - .maxattr = SUNRPC_A_IP_MAP_REQS_REQUESTS,
> - .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> + .cmd = SUNRPC_CMD_IP_MAP_GET_REQS,
> + .dumpit = sunrpc_nl_ip_map_get_reqs_dumpit,
> + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> },
> {
> .cmd = SUNRPC_CMD_IP_MAP_SET_REQS,
> @@ -71,11 +59,9 @@ static const struct genl_split_ops sunrpc_nl_ops[] = {
> .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
> },
> {
> - .cmd = SUNRPC_CMD_UNIX_GID_GET_REQS,
> - .dumpit = sunrpc_nl_unix_gid_get_reqs_dumpit,
> - .policy = sunrpc_unix_gid_get_reqs_nl_policy,
> - .maxattr = SUNRPC_A_UNIX_GID_REQS_REQUESTS,
> - .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> + .cmd = SUNRPC_CMD_UNIX_GID_GET_REQS,
> + .dumpit = sunrpc_nl_unix_gid_get_reqs_dumpit,
> + .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
> },
> {
> .cmd = SUNRPC_CMD_UNIX_GID_SET_REQS,
Reviewed-by: Jeff Layton <jlayton@kernel.org>
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 2/4] exportfs: split out the ops for layout-based block device access
2026-04-23 18:15 [PATCH 0/4] cleanup block-style layouts exports v3 Chuck Lever
2026-04-23 18:15 ` [PATCH 1/4] nfsd/blocklayout: always ignore loca_time_modify Chuck Lever
2026-04-23 18:15 ` [PATCH] NFSD: Put cache get-reqs dump attrs under reply Chuck Lever
@ 2026-04-23 18:15 ` Chuck Lever
2026-04-23 18:15 ` [PATCH 3/4] exportfs: don't pass struct iattr to ->commit_blocks Chuck Lever
2026-04-23 18:15 ` [PATCH 4/4] exportfs,nfsd: rework checking for layout-based block device access support Chuck Lever
4 siblings, 0 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:15 UTC (permalink / raw)
To: Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Christoph Hellwig
From: Christoph Hellwig <hch@lst.de>
The support to grant layouts for direct block device access works
at a very different layer than the rest of exports. Split the methods
for it into a separate struct, and move that into a separate header
to better split things out. The pointer to the new operation vector
is kept in export_operations to avoid bloating the super_block.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
MAINTAINERS | 2 +-
fs/nfsd/blocklayout.c | 14 ++++++------
fs/nfsd/nfs4layouts.c | 9 ++++----
fs/xfs/xfs_export.c | 4 +---
fs/xfs/xfs_pnfs.c | 12 ++++++++---
fs/xfs/xfs_pnfs.h | 11 +++++-----
include/linux/exportfs.h | 25 +++++++---------------
include/linux/exportfs_block.h | 39 ++++++++++++++++++++++++++++++++++
8 files changed, 74 insertions(+), 42 deletions(-)
create mode 100644 include/linux/exportfs_block.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 4e4edad57d46..d2ff02cee0cb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9892,7 +9892,7 @@ S: Supported
F: Documentation/filesystems/nfs/exporting.rst
F: fs/exportfs/
F: fs/fhandle.c
-F: include/linux/exportfs.h
+F: include/linux/exportfs*.h
FILESYSTEMS [IDMAPPED MOUNTS]
M: Christian Brauner <brauner@kernel.org>
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 24cc5025f649..e612fcf8666a 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -2,7 +2,7 @@
/*
* Copyright (c) 2014-2016 Christoph Hellwig.
*/
-#include <linux/exportfs.h>
+#include <linux/exportfs_block.h>
#include <linux/iomap.h>
#include <linux/slab.h>
#include <linux/pr.h>
@@ -32,8 +32,8 @@ nfsd4_block_map_extent(struct inode *inode, const struct svc_fh *fhp,
u32 device_generation = 0;
int error;
- error = sb->s_export_op->map_blocks(inode, offset, length, &iomap,
- iomode != IOMODE_READ, &device_generation);
+ error = sb->s_export_op->block_ops->map_blocks(inode, offset, length,
+ &iomap, iomode != IOMODE_READ, &device_generation);
if (error) {
if (error == -ENXIO)
return nfserr_layoutunavailable;
@@ -199,8 +199,8 @@ nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp,
iattr.ia_size = lcp->lc_newsize;
}
- error = inode->i_sb->s_export_op->commit_blocks(inode, iomaps,
- nr_iomaps, &iattr);
+ error = inode->i_sb->s_export_op->block_ops->commit_blocks(inode,
+ iomaps, nr_iomaps, &iattr);
kfree(iomaps);
return nfserrno(error);
}
@@ -223,8 +223,8 @@ nfsd4_block_get_device_info_simple(struct super_block *sb,
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);
+ return sb->s_export_op->block_ops->get_uuid(sb, b->simple.sig,
+ &b->simple.sig_len, &b->simple.offset);
}
static __be32
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 69e41105efdd..cf5b7eb417c5 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -3,6 +3,7 @@
* Copyright (c) 2014 Christoph Hellwig.
*/
#include <linux/blkdev.h>
+#include <linux/exportfs_block.h>
#include <linux/kmod.h>
#include <linux/file.h>
#include <linux/jhash.h>
@@ -129,6 +130,7 @@ void nfsd4_setup_layout_type(struct svc_export *exp)
{
#if defined(CONFIG_NFSD_BLOCKLAYOUT) || defined(CONFIG_NFSD_SCSILAYOUT)
struct super_block *sb = exp->ex_path.mnt->mnt_sb;
+ const struct exportfs_block_ops *bops = sb->s_export_op->block_ops;
#endif
if (!(exp->ex_flags & NFSEXP_PNFS))
@@ -138,14 +140,11 @@ void nfsd4_setup_layout_type(struct svc_export *exp)
exp->ex_layout_types |= 1 << LAYOUT_FLEX_FILES;
#endif
#ifdef CONFIG_NFSD_BLOCKLAYOUT
- if (sb->s_export_op->get_uuid &&
- sb->s_export_op->map_blocks &&
- sb->s_export_op->commit_blocks)
+ if (bops && bops->get_uuid && bops->map_blocks && bops->commit_blocks)
exp->ex_layout_types |= 1 << LAYOUT_BLOCK_VOLUME;
#endif
#ifdef CONFIG_NFSD_SCSILAYOUT
- if (sb->s_export_op->map_blocks &&
- sb->s_export_op->commit_blocks &&
+ if (bops && bops->map_blocks && bops->commit_blocks &&
sb->s_bdev &&
sb->s_bdev->bd_disk->fops->pr_ops &&
sb->s_bdev->bd_disk->fops->get_unique_id)
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index e3e3c3c89840..9b2ad3786b19 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -244,8 +244,6 @@ const struct export_operations xfs_export_operations = {
.get_parent = xfs_fs_get_parent,
.commit_metadata = xfs_fs_nfs_commit_metadata,
#ifdef CONFIG_EXPORTFS_BLOCK_OPS
- .get_uuid = xfs_fs_get_uuid,
- .map_blocks = xfs_fs_map_blocks,
- .commit_blocks = xfs_fs_commit_blocks,
+ .block_ops = &xfs_export_block_ops,
#endif
};
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index 221e55887a2a..12e083f1b9ba 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -49,7 +49,7 @@ xfs_break_leased_layouts(
* Get a unique ID including its location so that the client can identify
* the exported device.
*/
-int
+static int
xfs_fs_get_uuid(
struct super_block *sb,
u8 *buf,
@@ -104,7 +104,7 @@ xfs_fs_map_update_inode(
/*
* Get a layout for the pNFS client.
*/
-int
+static int
xfs_fs_map_blocks(
struct inode *inode,
loff_t offset,
@@ -252,7 +252,7 @@ xfs_pnfs_validate_isize(
* to manually flush the cache here similar to what the fsync code path does
* for datasyncs on files that have no dirty metadata.
*/
-int
+static int
xfs_fs_commit_blocks(
struct inode *inode,
struct iomap *maps,
@@ -332,3 +332,9 @@ xfs_fs_commit_blocks(
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
return error;
}
+
+const struct exportfs_block_ops xfs_export_block_ops = {
+ .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 940c6c2ad88c..bf43b2009e4c 100644
--- a/fs/xfs/xfs_pnfs.h
+++ b/fs/xfs/xfs_pnfs.h
@@ -2,13 +2,9 @@
#ifndef _XFS_PNFS_H
#define _XFS_PNFS_H 1
-#ifdef CONFIG_EXPORTFS_BLOCK_OPS
-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);
-int xfs_fs_commit_blocks(struct inode *inode, struct iomap *maps, int nr_maps,
- struct iattr *iattr);
+#include <linux/exportfs_block.h>
+#ifdef CONFIG_EXPORTFS_BLOCK_OPS
int xfs_break_leased_layouts(struct inode *inode, uint *iolock,
bool *did_unlock);
#else
@@ -18,4 +14,7 @@ xfs_break_leased_layouts(struct inode *inode, uint *iolock, bool *did_unlock)
return 0;
}
#endif /* CONFIG_EXPORTFS_BLOCK_OPS */
+
+extern const struct exportfs_block_ops xfs_export_block_ops;
+
#endif /* _XFS_PNFS_H */
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index 8bcdba28b406..c835bc64f4fa 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -6,9 +6,8 @@
#include <linux/path.h>
struct dentry;
-struct iattr;
+struct exportfs_block_ops;
struct inode;
-struct iomap;
struct super_block;
struct vfsmount;
@@ -260,19 +259,13 @@ struct handle_to_path_ctx {
* @commit_metadata:
* @commit_metadata should commit metadata changes to stable storage.
*
- * @get_uuid:
- * Get a filesystem unique signature exposed to clients.
- *
- * @map_blocks:
- * Map and, if necessary, allocate blocks for a layout.
- *
- * @commit_blocks:
- * Commit blocks in a layout once the client is done with them.
- *
* @flags:
* Allows the filesystem to communicate to nfsd that it may want to do things
* differently when dealing with it.
*
+ * @block_ops:
+ * Operations for layout grants to block on the underlying device.
+ *
* Locking rules:
* get_parent is called with child->d_inode->i_rwsem down
* get_name is not (which is possibly inconsistent)
@@ -290,12 +283,6 @@ struct export_operations {
struct dentry * (*get_parent)(struct dentry *child);
int (*commit_metadata)(struct inode *inode);
- int (*get_uuid)(struct super_block *sb, u8 *buf, u32 *len, u64 *offset);
- int (*map_blocks)(struct inode *inode, loff_t offset,
- u64 len, struct iomap *iomap,
- bool write, u32 *device_generation);
- int (*commit_blocks)(struct inode *inode, struct iomap *iomaps,
- int nr_iomaps, struct iattr *iattr);
int (*permission)(struct handle_to_path_ctx *ctx, unsigned int oflags);
struct file * (*open)(const struct path *path, unsigned int oflags);
#define EXPORT_OP_NOWCC (0x1) /* don't collect v3 wcc data */
@@ -308,6 +295,10 @@ struct export_operations {
#define EXPORT_OP_FLUSH_ON_CLOSE (0x20) /* fs flushes file data on close */
#define EXPORT_OP_NOLOCKS (0x40) /* no file locking support */
unsigned long flags;
+
+#ifdef CONFIG_EXPORTFS_BLOCK_OPS
+ const struct exportfs_block_ops *block_ops;
+#endif
};
/**
diff --git a/include/linux/exportfs_block.h b/include/linux/exportfs_block.h
new file mode 100644
index 000000000000..1f52fea8e4dc
--- /dev/null
+++ b/include/linux/exportfs_block.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2014-2026 Christoph Hellwig.
+ *
+ * Support for exportfs-based layout grants for direct block device access.
+ */
+#ifndef LINUX_EXPORTFS_BLOCK_H
+#define LINUX_EXPORTFS_BLOCK_H 1
+
+#include <linux/types.h>
+
+struct iattr;
+struct inode;
+struct iomap;
+struct super_block;
+
+struct exportfs_block_ops {
+ /*
+ * Get the in-band device unique signature exposed to clients.
+ */
+ int (*get_uuid)(struct super_block *sb, u8 *buf, u32 *len, u64 *offset);
+
+ /*
+ * Map blocks for direct block access.
+ * If @write is %true, also allocate the blocks for the range if needed.
+ */
+ int (*map_blocks)(struct inode *inode, loff_t offset, u64 len,
+ struct iomap *iomap, bool write,
+ u32 *device_generation);
+
+ /*
+ * Commit blocks previously handed out by ->map_blocks and written to by
+ * the client.
+ */
+ int (*commit_blocks)(struct inode *inode, struct iomap *iomaps,
+ int nr_iomaps, struct iattr *iattr);
+};
+
+#endif /* LINUX_EXPORTFS_BLOCK_H */
--
2.53.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 3/4] exportfs: don't pass struct iattr to ->commit_blocks
2026-04-23 18:15 [PATCH 0/4] cleanup block-style layouts exports v3 Chuck Lever
` (2 preceding siblings ...)
2026-04-23 18:15 ` [PATCH 2/4] exportfs: split out the ops for layout-based block device access Chuck Lever
@ 2026-04-23 18:15 ` Chuck Lever
2026-04-23 18:15 ` [PATCH 4/4] exportfs,nfsd: rework checking for layout-based block device access support Chuck Lever
4 siblings, 0 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:15 UTC (permalink / raw)
To: Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Christoph Hellwig
From: Christoph Hellwig <hch@lst.de>
The only thing ->commit_blocks really needs is the new size, with a magic
-1 placeholder 0 for "do not change the size" because it only ever
extends the size.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/blocklayout.c | 12 ++----------
fs/xfs/xfs_pnfs.c | 19 ++++++++++---------
include/linux/exportfs_block.h | 3 +--
3 files changed, 13 insertions(+), 21 deletions(-)
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index e612fcf8666a..5be7721c22c2 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -179,7 +179,6 @@ static __be32
nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp,
struct iomap *iomaps, int nr_iomaps)
{
- struct iattr iattr = { .ia_valid = 0 };
int error;
/*
@@ -191,16 +190,9 @@ nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp,
* timestamp is a "may" condition, and clients that want to force a
* specific timestamp should send a separate SETATTR in the compound.
*/
- iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
- iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = current_time(inode);
-
- if (lcp->lc_size_chg) {
- iattr.ia_valid |= ATTR_SIZE;
- iattr.ia_size = lcp->lc_newsize;
- }
-
error = inode->i_sb->s_export_op->block_ops->commit_blocks(inode,
- iomaps, nr_iomaps, &iattr);
+ iomaps, nr_iomaps,
+ lcp->lc_size_chg ? lcp->lc_newsize : 0);
kfree(iomaps);
return nfserrno(error);
}
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index 12e083f1b9ba..7d689bb2efd9 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -257,23 +257,22 @@ xfs_fs_commit_blocks(
struct inode *inode,
struct iomap *maps,
int nr_maps,
- struct iattr *iattr)
+ loff_t new_size)
{
struct xfs_inode *ip = XFS_I(inode);
struct xfs_mount *mp = ip->i_mount;
struct xfs_trans *tp;
+ struct timespec64 now;
bool update_isize = false;
int error, i;
loff_t size;
- ASSERT(iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME));
-
xfs_ilock(ip, XFS_IOLOCK_EXCL);
size = i_size_read(inode);
- if ((iattr->ia_valid & ATTR_SIZE) && iattr->ia_size > size) {
+ if (new_size > size) {
update_isize = true;
- size = iattr->ia_size;
+ size = new_size;
}
for (i = 0; i < nr_maps; i++) {
@@ -318,11 +317,13 @@ xfs_fs_commit_blocks(
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
- ASSERT(!(iattr->ia_valid & (ATTR_UID | ATTR_GID)));
- setattr_copy(&nop_mnt_idmap, inode, iattr);
+ now = inode_set_ctime_current(inode);
+ inode_set_atime_to_ts(inode, now);
+ inode_set_mtime_to_ts(inode, now);
+
if (update_isize) {
- i_size_write(inode, iattr->ia_size);
- ip->i_disk_size = iattr->ia_size;
+ i_size_write(inode, new_size);
+ ip->i_disk_size = new_size;
}
xfs_trans_set_sync(tp);
diff --git a/include/linux/exportfs_block.h b/include/linux/exportfs_block.h
index 1f52fea8e4dc..d1dec4689b14 100644
--- a/include/linux/exportfs_block.h
+++ b/include/linux/exportfs_block.h
@@ -9,7 +9,6 @@
#include <linux/types.h>
-struct iattr;
struct inode;
struct iomap;
struct super_block;
@@ -33,7 +32,7 @@ struct exportfs_block_ops {
* the client.
*/
int (*commit_blocks)(struct inode *inode, struct iomap *iomaps,
- int nr_iomaps, struct iattr *iattr);
+ int nr_iomaps, loff_t new_size);
};
#endif /* LINUX_EXPORTFS_BLOCK_H */
--
2.53.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 4/4] exportfs,nfsd: rework checking for layout-based block device access support
2026-04-23 18:15 [PATCH 0/4] cleanup block-style layouts exports v3 Chuck Lever
` (3 preceding siblings ...)
2026-04-23 18:15 ` [PATCH 3/4] exportfs: don't pass struct iattr to ->commit_blocks Chuck Lever
@ 2026-04-23 18:15 ` Chuck Lever
4 siblings, 0 replies; 8+ messages in thread
From: Chuck Lever @ 2026-04-23 18:15 UTC (permalink / raw)
To: Christian Brauner
Cc: NeilBrown, Jeff Layton, Olga Kornievskaia, Dai Ngo, Tom Talpey,
linux-nfs, Christoph Hellwig
From: Christoph Hellwig <hch@lst.de>
Currently NFSD hard codes checking support for block-style layouts.
Lift the checks into a file system-helper and provide a exportfs-level
helper to implement the typical checks.
This prepares for supporting block layout export of multiple devices
per file system.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/export.c | 3 +-
fs/nfsd/nfs4layouts.c | 26 +++++------------
fs/xfs/xfs_pnfs.c | 13 +++++++++
include/linux/exportfs_block.h | 52 +++++++++++++++++++++++++++++++++-
4 files changed, 73 insertions(+), 21 deletions(-)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 15972919e1e9..2584279a47ba 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1435,7 +1435,8 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
goto out4;
err = 0;
- nfsd4_setup_layout_type(&exp);
+ if (exp.ex_flags & NFSEXP_PNFS)
+ nfsd4_setup_layout_type(&exp);
}
expp = svc_export_lookup(&exp);
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index cf5b7eb417c5..c3543d456702 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -2,7 +2,6 @@
/*
* Copyright (c) 2014 Christoph Hellwig.
*/
-#include <linux/blkdev.h>
#include <linux/exportfs_block.h>
#include <linux/kmod.h>
#include <linux/file.h>
@@ -128,28 +127,17 @@ nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
void nfsd4_setup_layout_type(struct svc_export *exp)
{
-#if defined(CONFIG_NFSD_BLOCKLAYOUT) || defined(CONFIG_NFSD_SCSILAYOUT)
struct super_block *sb = exp->ex_path.mnt->mnt_sb;
- const struct exportfs_block_ops *bops = sb->s_export_op->block_ops;
-#endif
+ expfs_block_layouts_t block_supported = exportfs_layouts_supported(sb);
- if (!(exp->ex_flags & NFSEXP_PNFS))
- return;
-
-#ifdef CONFIG_NFSD_FLEXFILELAYOUT
- exp->ex_layout_types |= 1 << LAYOUT_FLEX_FILES;
-#endif
-#ifdef CONFIG_NFSD_BLOCKLAYOUT
- if (bops && bops->get_uuid && bops->map_blocks && bops->commit_blocks)
+ if (IS_ENABLED(CONFIG_NFSD_FLEXFILELAYOUT))
+ exp->ex_layout_types |= 1 << LAYOUT_FLEX_FILES;
+ if (IS_ENABLED(CONFIG_NFSD_BLOCKLAYOUT) &&
+ (block_supported & EXPFS_BLOCK_IN_BAND_ID))
exp->ex_layout_types |= 1 << LAYOUT_BLOCK_VOLUME;
-#endif
-#ifdef CONFIG_NFSD_SCSILAYOUT
- if (bops && bops->map_blocks && bops->commit_blocks &&
- sb->s_bdev &&
- sb->s_bdev->bd_disk->fops->pr_ops &&
- sb->s_bdev->bd_disk->fops->get_unique_id)
+ if (IS_ENABLED(CONFIG_NFSD_SCSILAYOUT) &&
+ (block_supported & EXPFS_BLOCK_OUT_OF_BAND_ID))
exp->ex_layout_types |= 1 << LAYOUT_SCSI;
-#endif
}
void nfsd4_close_layout(struct nfs4_layout_stateid *ls)
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index 7d689bb2efd9..266a07601e8d 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -13,6 +13,7 @@
#include "xfs_bmap.h"
#include "xfs_iomap.h"
#include "xfs_pnfs.h"
+#include <linux/exportfs_block.h>
/*
* Ensure that we do not have any outstanding pNFS layouts that can be used by
@@ -45,6 +46,17 @@ xfs_break_leased_layouts(
return error;
}
+static expfs_block_layouts_t
+xfs_fs_layouts_supported(
+ struct super_block *sb)
+{
+ expfs_block_layouts_t supported = EXPFS_BLOCK_IN_BAND_ID;
+
+ if (exportfs_bdev_supports_out_of_band_id(sb->s_bdev))
+ supported |= EXPFS_BLOCK_OUT_OF_BAND_ID;
+ return supported;
+}
+
/*
* Get a unique ID including its location so that the client can identify
* the exported device.
@@ -335,6 +347,7 @@ xfs_fs_commit_blocks(
}
const struct exportfs_block_ops xfs_export_block_ops = {
+ .layouts_supported = xfs_fs_layouts_supported,
.get_uuid = xfs_fs_get_uuid,
.map_blocks = xfs_fs_map_blocks,
.commit_blocks = xfs_fs_commit_blocks,
diff --git a/include/linux/exportfs_block.h b/include/linux/exportfs_block.h
index d1dec4689b14..de519b7b599b 100644
--- a/include/linux/exportfs_block.h
+++ b/include/linux/exportfs_block.h
@@ -7,13 +7,35 @@
#ifndef LINUX_EXPORTFS_BLOCK_H
#define LINUX_EXPORTFS_BLOCK_H 1
-#include <linux/types.h>
+#include <linux/blkdev.h>
+#include <linux/exportfs.h>
+#include <linux/fs.h>
struct inode;
struct iomap;
struct super_block;
+/*
+ * There are the two types of block-style layout support:
+ * - In-band implies a device identified by a unique cookie inside the actual
+ * device address space checked by the ->get_uuid method as used by the pNFS
+ * block layout. This is a bit dangerous and deprecated.
+ * - Out of band implies identification by out of band unique identifiers
+ * specified by the storage protocol, which is much safer and used by the
+ * pNFS SCSI/NVMe layouts.
+ */
+typedef unsigned int __bitwise expfs_block_layouts_t;
+#define EXPFS_BLOCK_FLAG(__bit) \
+ ((__force expfs_block_layouts_t)(1u << __bit))
+#define EXPFS_BLOCK_IN_BAND_ID EXPFS_BLOCK_FLAG(0)
+#define EXPFS_BLOCK_OUT_OF_BAND_ID EXPFS_BLOCK_FLAG(1)
+
struct exportfs_block_ops {
+ /*
+ * Returns the EXPFS_BLOCK_* bitmap of supported layout types.
+ */
+ expfs_block_layouts_t (*layouts_supported)(struct super_block *sb);
+
/*
* Get the in-band device unique signature exposed to clients.
*/
@@ -35,4 +57,32 @@ struct exportfs_block_ops {
int nr_iomaps, loff_t new_size);
};
+static inline bool
+exportfs_bdev_supports_out_of_band_id(struct block_device *bdev)
+{
+ return bdev->bd_disk->fops->pr_ops &&
+ bdev->bd_disk->fops->get_unique_id;
+}
+
+#ifdef CONFIG_EXPORTFS_BLOCK_OPS
+static inline expfs_block_layouts_t
+exportfs_layouts_supported(struct super_block *sb)
+{
+ const struct exportfs_block_ops *bops = sb->s_export_op->block_ops;
+
+ if (!bops ||
+ !bops->layouts_supported ||
+ WARN_ON_ONCE(!bops->map_blocks) ||
+ WARN_ON_ONCE(!bops->commit_blocks))
+ return 0;
+ return bops->layouts_supported(sb);
+}
+#else
+static inline expfs_block_layouts_t
+exportfs_layouts_supported(struct super_block *sb)
+{
+ return 0;
+}
+#endif /* CONFIG_EXPORTFS_BLOCK_OPS */
+
#endif /* LINUX_EXPORTFS_BLOCK_H */
--
2.53.0
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