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authorTrond Myklebust2018-03-28 16:18:17 -0400
committerAnna Schumaker2018-04-10 16:06:22 -0400
commit609339c123843ace16d6b17f10205cd61460ab02 (patch)
tree68ddc28611ce79ecd35775bdcd7d9460b7d04f2f /fs/nfs
parentf6cdfa6dd629604d6a6af4de92b9c6eea6d52b1c (diff)
NFSv4.1: Fix exclusive create
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> [Anna: Fixed typo NFS4_CREATE_EXCLUSIVE4 -> NFS4_CREATE_EXCLUSIVE] Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4proc.c49
1 files changed, 33 insertions, 16 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 3eb53d7784e2..b71757e85066 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_EXCLUSIVE) ?
+ 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)