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authorAl Viro <viro@zeniv.linux.org.uk>2011-06-22 18:53:18 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-20 01:43:46 -0400
commitf7c85868fcacc331dd3454a4f08f006d7942521f (patch)
tree03e01b3f96684911c353ce22c1cc757a36616977 /fs/nfs
parent511415980ace0ceecd71088dbe1c7ce4ca7c79fe (diff)
fix mknod() on nfs4 (hopefully)
a) check the right flags in ->create() (LOOKUP_OPEN, not LOOKUP_CREATE) b) default (!LOOKUP_OPEN) open_flags is O_CREAT|O_EXCL|FMODE_READ, not 0 c) lookup_instantiate_filp() should be done only with LOOKUP_OPEN; otherwise we need to issue CLOSE, lest we leak stateid on server. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/dir.c24
1 files changed, 12 insertions, 12 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index cc613c354bb..1f462574903 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1567,7 +1567,7 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
struct nfs_open_context *ctx = NULL;
struct iattr attr;
int error;
- int open_flags = 0;
+ int open_flags = O_CREAT|O_EXCL|FMODE_READ;
dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
@@ -1575,27 +1575,27 @@ static int nfs_open_create(struct inode *dir, struct dentry *dentry, int mode,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if ((nd->flags & LOOKUP_CREATE) != 0) {
+ if (nd && (nd->flags & LOOKUP_OPEN) != 0)
open_flags = nd->intent.open.flags;
- ctx = create_nfs_open_context(dentry, open_flags);
- error = PTR_ERR(ctx);
- if (IS_ERR(ctx))
- goto out_err_drop;
- }
+ ctx = create_nfs_open_context(dentry, open_flags);
+ error = PTR_ERR(ctx);
+ if (IS_ERR(ctx))
+ goto out_err_drop;
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, ctx);
if (error != 0)
goto out_put_ctx;
- if (ctx != NULL) {
+ if (nd && (nd->flags & LOOKUP_OPEN) != 0) {
error = nfs_intent_set_file(nd, ctx);
if (error < 0)
goto out_err;
+ } else {
+ put_nfs_open_context(ctx);
}
return 0;
out_put_ctx:
- if (ctx != NULL)
- put_nfs_open_context(ctx);
+ put_nfs_open_context(ctx);
out_err_drop:
d_drop(dentry);
out_err:
@@ -1657,7 +1657,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
{
struct iattr attr;
int error;
- int open_flags = 0;
+ int open_flags = O_CREAT|O_EXCL|FMODE_READ;
dfprintk(VFS, "NFS: create(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
@@ -1665,7 +1665,7 @@ static int nfs_create(struct inode *dir, struct dentry *dentry, int mode,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
- if ((nd->flags & LOOKUP_CREATE) != 0)
+ if (nd && (nd->flags & LOOKUP_OPEN) != 0)
open_flags = nd->intent.open.flags;
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags, NULL);