* [PATCH v2] NFSv4.1: Fix exclusive create
@ 2018-03-28 20:18 Trond Myklebust
2018-03-28 20:45 ` Anna Schumaker
0 siblings, 1 reply; 2+ messages in thread
From: Trond Myklebust @ 2018-03-28 20:18 UTC (permalink / raw)
To: Anna Schumaker; +Cc: linux-nfs
When we use EXCLUSIVE4_1 mode, the server returns an attribute mask where
all the bits indicate which attributes were set, and where the verifier
was stored. In order to figure out which attribute we have to resend,
we need to clear out the attributes that are set in exclcreat_bitmask.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
fs/nfs/nfs4proc.c | 49 +++++++++++++++++++++++++++++++++----------------
1 file changed, 33 insertions(+), 16 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 6933109fa30f..0d1d37d9a345 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2750,27 +2750,40 @@ static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
* fields corresponding to attributes that were used to store the verifier.
* Make sure we clobber those fields in the later setattr call
*/
-static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
+static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
struct iattr *sattr, struct nfs4_label **label)
{
- const u32 *attrset = opendata->o_res.attrset;
+ const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
+ __u32 attrset[3];
+ unsigned ret;
+ unsigned i;
- if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
- !(sattr->ia_valid & ATTR_ATIME_SET))
- sattr->ia_valid |= ATTR_ATIME;
+ for (i = 0; i < ARRAY_SIZE(attrset); i++) {
+ attrset[i] = opendata->o_res.attrset[i];
+ if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
+ attrset[i] &= ~bitmask[i];
+ }
+
+ ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4) ?
+ sattr->ia_valid : 0;
- if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
- !(sattr->ia_valid & ATTR_MTIME_SET))
- sattr->ia_valid |= ATTR_MTIME;
+ if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
+ if (sattr->ia_valid & ATTR_ATIME_SET)
+ ret |= ATTR_ATIME_SET;
+ else
+ ret |= ATTR_ATIME;
+ }
- /* Except MODE, it seems harmless of setting twice. */
- if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
- (attrset[1] & FATTR4_WORD1_MODE ||
- attrset[2] & FATTR4_WORD2_MODE_UMASK))
- sattr->ia_valid &= ~ATTR_MODE;
+ if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
+ if (sattr->ia_valid & ATTR_MTIME_SET)
+ ret |= ATTR_MTIME_SET;
+ else
+ ret |= ATTR_MTIME;
+ }
- if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
+ if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
*label = NULL;
+ return ret;
}
static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
@@ -2899,12 +2912,15 @@ static int _nfs4_do_open(struct inode *dir,
if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
(opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
- nfs4_exclusive_attrset(opendata, sattr, &label);
+ unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
/*
* send create attributes which was not set by open
* with an extra setattr.
*/
- if (sattr->ia_valid & NFS4_VALID_ATTRS) {
+ if (attrs || label) {
+ unsigned ia_old = sattr->ia_valid;
+
+ sattr->ia_valid = attrs;
nfs_fattr_init(opendata->o_res.f_attr);
status = nfs4_do_setattr(state->inode, cred,
opendata->o_res.f_attr, sattr,
@@ -2914,6 +2930,7 @@ static int _nfs4_do_open(struct inode *dir,
opendata->o_res.f_attr);
nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
}
+ sattr->ia_valid = ia_old;
}
}
if (opened && opendata->file_created)
--
2.14.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] NFSv4.1: Fix exclusive create
2018-03-28 20:18 [PATCH v2] NFSv4.1: Fix exclusive create Trond Myklebust
@ 2018-03-28 20:45 ` Anna Schumaker
0 siblings, 0 replies; 2+ messages in thread
From: Anna Schumaker @ 2018-03-28 20:45 UTC (permalink / raw)
To: Trond Myklebust; +Cc: linux-nfs
On 03/28/2018 04:18 PM, Trond Myklebust wrote:
> When we use EXCLUSIVE4_1 mode, the server returns an attribute mask where
> all the bits indicate which attributes were set, and where the verifier
> was stored. In order to figure out which attribute we have to resend,
> we need to clear out the attributes that are set in exclcreat_bitmask.
>
> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
> ---
> fs/nfs/nfs4proc.c | 49 +++++++++++++++++++++++++++++++++----------------
> 1 file changed, 33 insertions(+), 16 deletions(-)
>
> diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
> index 6933109fa30f..0d1d37d9a345 100644
> --- a/fs/nfs/nfs4proc.c
> +++ b/fs/nfs/nfs4proc.c
> @@ -2750,27 +2750,40 @@ static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *st
> * fields corresponding to attributes that were used to store the verifier.
> * Make sure we clobber those fields in the later setattr call
> */
> -static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
> +static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
> struct iattr *sattr, struct nfs4_label **label)
> {
> - const u32 *attrset = opendata->o_res.attrset;
> + const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
> + __u32 attrset[3];
> + unsigned ret;
> + unsigned i;
>
> - if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
> - !(sattr->ia_valid & ATTR_ATIME_SET))
> - sattr->ia_valid |= ATTR_ATIME;
> + for (i = 0; i < ARRAY_SIZE(attrset); i++) {
> + attrset[i] = opendata->o_res.attrset[i];
> + if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
> + attrset[i] &= ~bitmask[i];
> + }
> +
> + ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4) ?
^^^^^^^^^^^^^^^^^^^^^^
I assume you mean NFS4_CREATE_EXCLUSIVE? I can fix it in my tree if you want
anna@gouda ~/linux/anna (git)-[linux-next] % git grep NFS4_CREATE_EXCLUSIVE include/
include/linux/nfs4.h: NFS4_CREATE_EXCLUSIVE = 2,
include/linux/nfs4.h: NFS4_CREATE_EXCLUSIVE4_1 = 3
> + sattr->ia_valid : 0;
>
> - if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
> - !(sattr->ia_valid & ATTR_MTIME_SET))
> - sattr->ia_valid |= ATTR_MTIME;
> + if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
> + if (sattr->ia_valid & ATTR_ATIME_SET)
> + ret |= ATTR_ATIME_SET;
> + else
> + ret |= ATTR_ATIME;
> + }
>
> - /* Except MODE, it seems harmless of setting twice. */
> - if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
> - (attrset[1] & FATTR4_WORD1_MODE ||
> - attrset[2] & FATTR4_WORD2_MODE_UMASK))
> - sattr->ia_valid &= ~ATTR_MODE;
> + if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
> + if (sattr->ia_valid & ATTR_MTIME_SET)
> + ret |= ATTR_MTIME_SET;
> + else
> + ret |= ATTR_MTIME;
> + }
>
> - if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
> + if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
> *label = NULL;
> + return ret;
> }
>
> static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
> @@ -2899,12 +2912,15 @@ static int _nfs4_do_open(struct inode *dir,
>
> if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
> (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
> - nfs4_exclusive_attrset(opendata, sattr, &label);
> + unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
> /*
> * send create attributes which was not set by open
> * with an extra setattr.
> */
> - if (sattr->ia_valid & NFS4_VALID_ATTRS) {
> + if (attrs || label) {
> + unsigned ia_old = sattr->ia_valid;
> +
> + sattr->ia_valid = attrs;
> nfs_fattr_init(opendata->o_res.f_attr);
> status = nfs4_do_setattr(state->inode, cred,
> opendata->o_res.f_attr, sattr,
> @@ -2914,6 +2930,7 @@ static int _nfs4_do_open(struct inode *dir,
> opendata->o_res.f_attr);
> nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
> }
> + sattr->ia_valid = ia_old;
> }
> }
> if (opened && opendata->file_created)
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2018-03-28 20:45 ` Anna Schumaker
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