diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-01-18 04:04:26 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-02-01 01:28:07 +0100 |
| commit | 536e43d12b9517bbbf6114cd1a12be27857a4d7a (patch) | |
| tree | a40424a430fd651fe7b35232717f2201c608059a /fs/nfs/nfs4proc.c | |
| parent | NFS: Move struct nfs_unique_id into struct nfs_seqid_counter (diff) | |
| download | linux-536e43d12b9517bbbf6114cd1a12be27857a4d7a.tar.xz linux-536e43d12b9517bbbf6114cd1a12be27857a4d7a.zip | |
NFS: Optimise away unnecessary setattrs for open(O_TRUNC);
Currently, we will correctly optimise away a truncate that doesn't
change the file size. However, in the case of open(O_TRUNC), we
also want to optimise away the time changes.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/nfs/nfs4proc.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 88a8b6999b4f..360240cc1e9b 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -828,7 +828,7 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, p->o_arg.bitmask = server->attr_bitmask; p->o_arg.dir_bitmask = server->cache_consistency_bitmask; p->o_arg.claim = NFS4_OPEN_CLAIM_NULL; - if (flags & O_CREAT) { + if (attrs != NULL && attrs->ia_valid != 0) { u32 *s; p->o_arg.u.attrs = &p->attrs; @@ -885,7 +885,7 @@ static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode { int ret = 0; - if (open_mode & O_EXCL) + if (open_mode & (O_EXCL|O_TRUNC)) goto out; switch (mode & (FMODE_READ|FMODE_WRITE)) { case FMODE_READ: @@ -1033,7 +1033,7 @@ static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) struct nfs4_state *state = opendata->state; struct nfs_inode *nfsi = NFS_I(state->inode); struct nfs_delegation *delegation; - int open_mode = opendata->o_arg.open_flags & O_EXCL; + int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC); fmode_t fmode = opendata->o_arg.fmode; nfs4_stateid stateid; int ret = -EAGAIN; @@ -2431,6 +2431,10 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, } } + /* Deal with open(O_TRUNC) */ + if (sattr->ia_valid & ATTR_OPEN) + sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN); + status = nfs4_do_setattr(inode, cred, fattr, sattr, state); if (status == 0) nfs_setattr_update_inode(inode, sattr); |