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authorAl Viro <viro@zeniv.linux.org.uk>2009-12-19 10:15:07 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2009-12-22 12:27:34 -0500
commit5300990c0370e804e49d9a59d928c5d53fb73487 (patch)
tree08ed922afd172662039c082ec9e9410070f4afe8
parent482928d59db668b8d82a48717f78986d8cea72e9 (diff)
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Sanitize f_flags helpers
* pull ACC_MODE to fs.h; we have several copies all over the place * nightmarish expression calculating f_mode by f_flags deserves a helper too (OPEN_FMODE(flags)) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/anon_inodes.c10
-rw-r--r--fs/namei.c2
-rw-r--r--fs/open.c2
-rw-r--r--include/linux/fs.h3
-rw-r--r--kernel/auditsc.c1
-rw-r--r--security/tomoyo/file.c1
6 files changed, 5 insertions, 14 deletions
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 598237e97221..9f0bf13291e5 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -89,19 +89,11 @@ struct file *anon_inode_getfile(const char *name,
struct qstr this;
struct path path;
struct file *file;
- fmode_t mode;
int error;
if (IS_ERR(anon_inode_inode))
return ERR_PTR(-ENODEV);
- switch (flags & O_ACCMODE) {
- case O_RDONLY: mode = FMODE_READ; break;
- case O_WRONLY: mode = FMODE_WRITE; break;
- case O_RDWR: mode = FMODE_READ | FMODE_WRITE; break;
- default: return ERR_PTR(-EINVAL);
- }
-
if (fops->owner && !try_module_get(fops->owner))
return ERR_PTR(-ENOENT);
@@ -129,7 +121,7 @@ struct file *anon_inode_getfile(const char *name,
d_instantiate(path.dentry, anon_inode_inode);
error = -ENFILE;
- file = alloc_file(&path, mode, fops);
+ file = alloc_file(&path, OPEN_FMODE(flags), fops);
if (!file)
goto err_dput;
file->f_mapping = anon_inode_inode->i_mapping;
diff --git a/fs/namei.c b/fs/namei.c
index d517f73aa36b..68921d9b5302 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -37,8 +37,6 @@
#include "internal.h"
-#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
-
/* [Feb-1997 T. Schoebel-Theuer]
* Fundamental changes in the pathname lookup mechanisms (namei)
* were necessary because of omirr. The reason is that omirr needs
diff --git a/fs/open.c b/fs/open.c
index 6daee28f6e8f..040cef72bc00 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -828,7 +828,7 @@ static struct file *__dentry_open(struct dentry *dentry, struct vfsmount *mnt,
struct inode *inode;
int error;
- f->f_mode = (__force fmode_t)((f->f_flags+1) & O_ACCMODE) | FMODE_LSEEK |
+ f->f_mode = OPEN_FMODE(f->f_flags) | FMODE_LSEEK |
FMODE_PREAD | FMODE_PWRITE;
inode = dentry->d_inode;
if (f->f_mode & FMODE_WRITE) {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index cca191933ff6..9e13b533aaef 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2464,5 +2464,8 @@ int proc_nr_files(struct ctl_table *table, int write,
int __init get_filesystem_list(char *buf);
+#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
+#define OPEN_FMODE(flag) ((__force fmode_t)((flag + 1) & O_ACCMODE))
+
#endif /* __KERNEL__ */
#endif /* _LINUX_FS_H */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 267e484f0198..fc0f928167e7 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -250,7 +250,6 @@ struct audit_context {
#endif
};
-#define ACC_MODE(x) ("\004\002\006\006"[(x)&O_ACCMODE])
static inline int open_arg(int flags, int mask)
{
int n = ACC_MODE(flags);
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 8346938809b1..9a6c58881c0a 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -12,7 +12,6 @@
#include "common.h"
#include "tomoyo.h"
#include "realpath.h"
-#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
/*
* tomoyo_globally_readable_file_entry is a structure which is used for holding