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pull manipulations of rpc_cred inside alloc_nfs_open_context()

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No need to duplicate them in both callers; make it return
ERR_PTR(-ENOMEM) on allocation failure instead of NULL and
it'll be able to report rpc_lookup_cred() failures just
fine.  Callers are much happier that way...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2011-10-23 18:49:54 -04:00
parent 157e8bf8b4
commit 5ede7b1cfa
3 changed files with 22 additions and 33 deletions
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40
fs/nfs/inode.c
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@@ -629,23 +629,28 @@ void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
nfs_revalidate_inode(server, inode);
}
struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, struct rpc_cred *cred, fmode_t f_mode)
struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode)
{
struct nfs_open_context *ctx;
struct rpc_cred *cred = rpc_lookup_cred();
if (IS_ERR(cred))
return ERR_CAST(cred);
ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
if (ctx != NULL) {
nfs_sb_active(dentry->d_sb);
ctx->dentry = dget(dentry);
ctx->cred = get_rpccred(cred);
ctx->state = NULL;
ctx->mode = f_mode;
ctx->flags = 0;
ctx->error = 0;
nfs_init_lock_context(&ctx->lock_context);
ctx->lock_context.open_context = ctx;
INIT_LIST_HEAD(&ctx->list);
if (!ctx) {
put_rpccred(cred);
return ERR_PTR(-ENOMEM);
}
nfs_sb_active(dentry->d_sb);
ctx->dentry = dget(dentry);
ctx->cred = cred;
ctx->state = NULL;
ctx->mode = f_mode;
ctx->flags = 0;
ctx->error = 0;
nfs_init_lock_context(&ctx->lock_context);
ctx->lock_context.open_context = ctx;
INIT_LIST_HEAD(&ctx->list);
return ctx;
}
@@ -738,15 +743,10 @@ static void nfs_file_clear_open_context(struct file *filp)
int nfs_open(struct inode *inode, struct file *filp)
{
struct nfs_open_context *ctx;
struct rpc_cred *cred;
cred = rpc_lookup_cred();
if (IS_ERR(cred))
return PTR_ERR(cred);
ctx = alloc_nfs_open_context(filp->f_path.dentry, cred, filp->f_mode);
put_rpccred(cred);
if (ctx == NULL)
return -ENOMEM;
ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
nfs_file_set_open_context(filp, ctx);
put_nfs_open_context(ctx);
nfs_fscache_set_inode_cookie(inode, filp);