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vfs: add flags to d_real()

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Add a separate flags argument (in addition to the open flags) to control
the behavior of d_real().

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Miklos Szeredi 2017-09-04 21:42:22 +02:00
parent 191a3980c6
commit 495e642939
6 changed files with 13 additions and 12 deletions
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11
include/linux/dcache.h
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@ -147,7 +147,7 @@ struct dentry_operations {
struct vfsmount *(*d_automount)(struct path *);
int (*d_manage)(const struct path *, bool);
struct dentry *(*d_real)(struct dentry *, const struct inode *,
unsigned int);
unsigned int, unsigned int);
} ____cacheline_aligned;
/*
@ -566,7 +566,8 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
* d_real - Return the real dentry
* @dentry: the dentry to query
* @inode: inode to select the dentry from multiple layers (can be NULL)
* @flags: open flags to control copy-up behavior
* @open_flags: open flags to control copy-up behavior
* @flags: flags to control what is returned by this function
*
* If dentry is on a union/overlay, then return the underlying, real dentry.
* Otherwise return the dentry itself.
@ -575,10 +576,10 @@ static inline struct dentry *d_backing_dentry(struct dentry *upper)
*/
static inline struct dentry *d_real(struct dentry *dentry,
const struct inode *inode,
unsigned int flags)
unsigned int open_flags, unsigned int flags)
{
if (unlikely(dentry->d_flags & DCACHE_OP_REAL))
return dentry->d_op->d_real(dentry, inode, flags);
return dentry->d_op->d_real(dentry, inode, open_flags, flags);
else
return dentry;
}
@ -593,7 +594,7 @@ static inline struct dentry *d_real(struct dentry *dentry,
static inline struct inode *d_real_inode(const struct dentry *dentry)
{
/* This usage of d_real() results in const dentry */
return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0));
return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0, 0));
}
struct name_snapshot {