dect/linux-2.6
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NFSv4: Clean up nfs4_open_revalidate

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Remove references to 'struct nameidata' from the low-level open_revalidate
code, and replace them with a struct nfs_open_context which will be
correctly initialised upon success.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2010-09-17 10:56:51 -04:00
parent f46e0bd34e
commit b8d4caddd8
3 changed files with 17 additions and 19 deletions
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11
fs/nfs/dir.c
View file

@ -1169,6 +1169,7 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
struct dentry *parent = NULL;
struct inode *inode = dentry->d_inode;
struct inode *dir;
struct nfs_open_context *ctx;
int openflags, ret = 0;
if (!is_atomic_open(nd) || d_mountpoint(dentry))
@ -1194,12 +1195,20 @@ static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
/* We can't create new files, or truncate existing ones here */
openflags &= ~(O_CREAT|O_EXCL|O_TRUNC);
ctx = nameidata_to_nfs_open_context(dentry, nd);
ret = PTR_ERR(ctx);
if (IS_ERR(ctx))
goto out;
/*
* Note: we're not holding inode->i_mutex and so may be racing with
* operations that change the directory. We therefore save the
* change attribute *before* we do the RPC call.
*/
ret = nfs4_open_revalidate(dir, dentry, openflags, nd);
ret = nfs4_open_revalidate(dir, ctx, openflags);
if (ret == 1)
nfs_intent_set_file(nd, ctx);
else
put_nfs_open_context(ctx);
out:
dput(parent);
if (!ret)

2
fs/nfs/nfs4_fs.h
View file

@ -243,7 +243,7 @@ extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
extern int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait);
extern struct inode *nfs4_atomic_open(struct inode *, struct nfs_open_context *, int, struct iattr *);
extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
extern int nfs4_open_revalidate(struct inode *, struct nfs_open_context *, int);
extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
struct nfs4_fs_locations *fs_locations, struct page *page);

23
fs/nfs/nfs4proc.c
View file

@ -2038,21 +2038,11 @@ nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags
}
int
nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
nfs4_open_revalidate(struct inode *dir, struct nfs_open_context *ctx, int openflags)
{
struct path path = {
.mnt = nd->path.mnt,
.dentry = dentry,
};
struct rpc_cred *cred;
struct nfs4_state *state;
fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
cred = rpc_lookup_cred();
if (IS_ERR(cred))
return PTR_ERR(cred);
state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
put_rpccred(cred);
state = nfs4_do_open(dir, &ctx->path, ctx->mode, openflags, NULL, ctx->cred);
if (IS_ERR(state)) {
switch (PTR_ERR(state)) {
case -EPERM:
@ -2065,14 +2055,13 @@ nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, st
goto out_drop;
}
}
if (state->inode == dentry->d_inode) {
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
nfs4_intent_set_file(nd, &path, state, fmode);
ctx->state = state;
if (state->inode == ctx->path.dentry->d_inode) {
nfs_set_verifier(ctx->path.dentry, nfs_save_change_attribute(dir));
return 1;
}
nfs4_close_sync(&path, state, fmode);
out_drop:
d_drop(dentry);
d_drop(ctx->path.dentry);
return 0;
}