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linux-sg2042
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pass a struct path * to may_open 

No need for the nameidata in may_open - a struct path is enough.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Christoph Hellwig 2008-10-24 09:58:10 +02:00 committed by Al Viro
parent b4091d5f6f
commit 3fb64190aa
3 changed files with 11 additions and 10 deletions
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14
fs/namei.c
View File

@ -1487,9 +1487,9 @@ int vfs_create(struct inode *dir, struct dentry *dentry, int mode,
return error;
}
int may_open(struct nameidata *nd, int acc_mode, int flag)
int may_open(struct path *path, int acc_mode, int flag)
{
struct dentry *dentry = nd->path.dentry;
struct dentry *dentry = path->dentry;
struct inode *inode = dentry->d_inode;
int error;
@ -1510,13 +1510,13 @@ int may_open(struct nameidata *nd, int acc_mode, int flag)
if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
flag &= ~O_TRUNC;
} else if (S_ISBLK(inode->i_mode) || S_ISCHR(inode->i_mode)) {
if (nd->path.mnt->mnt_flags & MNT_NODEV)
if (path->mnt->mnt_flags & MNT_NODEV)
return -EACCES;
flag &= ~O_TRUNC;
}
error = vfs_permission(nd, acc_mode);
error = inode_permission(inode, acc_mode);
if (error)
return error;
/*
@ -1551,7 +1551,7 @@ int may_open(struct nameidata *nd, int acc_mode, int flag)
*/
error = locks_verify_locked(inode);
if (!error)
error = security_path_truncate(&nd->path, 0,
error = security_path_truncate(path, 0,
ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
if (!error) {
DQUOT_INIT(inode);
@ -1594,7 +1594,7 @@ out_unlock:
if (error)
return error;
/* Don't check for write permission, don't truncate */
return may_open(nd, 0, flag & ~O_TRUNC);
return may_open(&nd->path, 0, flag & ~O_TRUNC);
}
/*
@ -1780,7 +1780,7 @@ ok:
if (error)
goto exit;
}
error = may_open(&nd, acc_mode, flag);
error = may_open(&nd.path, acc_mode, flag);
if (error) {
if (will_write)
mnt_drop_write(nd.path.mnt);

5
fs/nfsctl.c
View File

@ -38,9 +38,10 @@ static struct file *do_open(char *name, int flags)
return ERR_PTR(error);
if (flags == O_RDWR)
error = may_open(&nd,MAY_READ|MAY_WRITE,FMODE_READ|FMODE_WRITE);
error = may_open(&nd.path, MAY_READ|MAY_WRITE,
FMODE_READ|FMODE_WRITE);
else
error = may_open(&nd, MAY_WRITE, FMODE_WRITE);
error = may_open(&nd.path, MAY_WRITE, FMODE_WRITE);
if (!error)
return dentry_open(nd.path.dentry, nd.path.mnt, flags,

2
include/linux/fs.h
View File

@ -1869,7 +1869,7 @@ extern void free_write_pipe(struct file *);
extern struct file *do_filp_open(int dfd, const char *pathname,
int open_flag, int mode);
extern int may_open(struct nameidata *, int, int);
extern int may_open(struct path *, int, int);
extern int kernel_read(struct file *, unsigned long, char *, unsigned long);
extern struct file * open_exec(const char *);