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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-06-22 18:53:18 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-20 01:43:46 -0400 |
| commit | f7c85868fcacc331dd3454a4f08f006d7942521f (patch) | |
| tree | 03e01b3f96684911c353ce22c1cc757a36616977 | |
| parent | 511415980ace0ceecd71088dbe1c7ce4ca7c79fe (diff) | |
| download | linux-f7c85868fcacc331dd3454a4f08f006d7942521f.tar.gz linux-f7c85868fcacc331dd3454a4f08f006d7942521f.tar.bz2 linux-f7c85868fcacc331dd3454a4f08f006d7942521f.zip | |
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>
| -rw-r--r-- | fs/nfs/dir.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index cc613c354bb8..1f4625749038 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); |