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| author | Christoph Hellwig <hch@lst.de> | 2008-05-19 07:53:34 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2008-07-26 20:53:29 -0400 |
| commit | e56b6a5dda1a36ffaa532df6f975ea324298fa4d (patch) | |
| tree | 700077a8ea298076d1a90e581ea577f4ad27d2dd /fs | |
| parent | beb29e058c35ab69e96e455a12ccf7505f6de425 (diff) | |
| download | linux-e56b6a5dda1a36ffaa532df6f975ea324298fa4d.tar.gz linux-e56b6a5dda1a36ffaa532df6f975ea324298fa4d.tar.bz2 linux-e56b6a5dda1a36ffaa532df6f975ea324298fa4d.zip | |
Re: [PATCH 3/6] vfs: open_exec cleanup
On Mon, May 19, 2008 at 12:01:49AM +0200, Marcin Slusarz wrote:
> open_exec is needlessly indented, calls ERR_PTR with 0 argument
> (which is not valid errno) and jumps into middle of function
> just to return value.
> So clean it up a bit.
Still looks rather messy. See below for a better version.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/exec.c | 58 |
1 files changed, 30 insertions, 28 deletions
diff --git a/fs/exec.c b/fs/exec.c index 0ba5d355c5a1..346e3f69c6e0 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -656,38 +656,40 @@ EXPORT_SYMBOL(setup_arg_pages); struct file *open_exec(const char *name) { struct nameidata nd; - int err; struct file *file; + int err; - err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, FMODE_READ|FMODE_EXEC); - file = ERR_PTR(err); - - if (!err) { - struct inode *inode = nd.path.dentry->d_inode; - file = ERR_PTR(-EACCES); - if (S_ISREG(inode->i_mode)) { - int err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN); - file = ERR_PTR(err); - if (!err) { - file = nameidata_to_filp(&nd, - O_RDONLY|O_LARGEFILE); - if (!IS_ERR(file)) { - err = deny_write_access(file); - if (err) { - fput(file); - file = ERR_PTR(err); - } - } -out: - return file; - } - } - release_open_intent(&nd); - path_put(&nd.path); + err = path_lookup_open(AT_FDCWD, name, LOOKUP_FOLLOW, &nd, + FMODE_READ|FMODE_EXEC); + if (err) + goto out; + + err = -EACCES; + if (!S_ISREG(nd.path.dentry->d_inode->i_mode)) + goto out_path_put; + + err = vfs_permission(&nd, MAY_EXEC | MAY_OPEN); + if (err) + goto out_path_put; + + file = nameidata_to_filp(&nd, O_RDONLY|O_LARGEFILE); + if (IS_ERR(file)) + return file; + + err = deny_write_access(file); + if (err) { + fput(file); + goto out; } - goto out; -} + return file; + + out_path_put: + release_open_intent(&nd); + path_put(&nd.path); + out: + return ERR_PTR(err); +} EXPORT_SYMBOL(open_exec); int kernel_read(struct file *file, unsigned long offset, |