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Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c34
1 files changed, 22 insertions, 12 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 0dc4cbf21f37..645268f23eb6 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2656,6 +2656,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
int acc_mode;
int create_error = 0;
struct dentry *const DENTRY_NOT_SET = (void *) -1UL;
+ bool excl;
BUG_ON(dentry->d_inode);
@@ -2669,10 +2670,9 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
if ((open_flag & O_CREAT) && !IS_POSIXACL(dir))
mode &= ~current_umask();
- if ((open_flag & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT)) {
+ excl = (open_flag & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT);
+ if (excl)
open_flag &= ~O_TRUNC;
- *opened |= FILE_CREATED;
- }
/*
* Checking write permission is tricky, bacuse we don't know if we are
@@ -2725,12 +2725,6 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
goto out;
}
- acc_mode = op->acc_mode;
- if (*opened & FILE_CREATED) {
- fsnotify_create(dir, dentry);
- acc_mode = MAY_OPEN;
- }
-
if (error) { /* returned 1, that is */
if (WARN_ON(file->f_path.dentry == DENTRY_NOT_SET)) {
error = -EIO;
@@ -2740,9 +2734,19 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
dput(dentry);
dentry = file->f_path.dentry;
}
- if (create_error && dentry->d_inode == NULL) {
- error = create_error;
- goto out;
+ if (*opened & FILE_CREATED)
+ fsnotify_create(dir, dentry);
+ if (!dentry->d_inode) {
+ WARN_ON(*opened & FILE_CREATED);
+ if (create_error) {
+ error = create_error;
+ goto out;
+ }
+ } else {
+ if (excl && !(*opened & FILE_CREATED)) {
+ error = -EEXIST;
+ goto out;
+ }
}
goto looked_up;
}
@@ -2751,6 +2755,12 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry,
* We didn't have the inode before the open, so check open permission
* here.
*/
+ acc_mode = op->acc_mode;
+ if (*opened & FILE_CREATED) {
+ WARN_ON(!(open_flag & O_CREAT));
+ fsnotify_create(dir, dentry);
+ acc_mode = MAY_OPEN;
+ }
error = may_open(&file->f_path, acc_mode, open_flag);
if (error)
fput(file);