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kill d_validate()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-12-24 22:47:00 -05:00
parent 5e993e2534
commit d6cb125b99
2 changed files with 0 additions and 34 deletions
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31
fs/dcache.c
View file

@ -2187,37 +2187,6 @@ struct dentry *d_hash_and_lookup(struct dentry *dir, struct qstr *name)
}
EXPORT_SYMBOL(d_hash_and_lookup);
/**
* d_validate - verify dentry provided from insecure source (deprecated)
* @dentry: The dentry alleged to be valid child of @dparent
* @dparent: The parent dentry (known to be valid)
*
* An insecure source has sent us a dentry, here we verify it and dget() it.
* This is used by ncpfs in its readdir implementation.
* Zero is returned in the dentry is invalid.
*
* This function is slow for big directories, and deprecated, do not use it.
*/
int d_validate(struct dentry *dentry, struct dentry *dparent)
{
struct dentry *child;
spin_lock(&dparent->d_lock);
list_for_each_entry(child, &dparent->d_subdirs, d_child) {
if (dentry == child) {
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
__dget_dlock(dentry);
spin_unlock(&dentry->d_lock);
spin_unlock(&dparent->d_lock);
return 1;
}
}
spin_unlock(&dparent->d_lock);
return 0;
}
EXPORT_SYMBOL(d_validate);
/*
* When a file is deleted, we have two options:
* - turn this dentry into a negative dentry

3
include/linux/dcache.h
View file

@ -319,9 +319,6 @@ static inline unsigned d_count(const struct dentry *dentry)
return dentry->d_lockref.count;
}
/* validate "insecure" dentry pointer */
extern int d_validate(struct dentry *, struct dentry *);
/*
* helper function for dentry_operations.d_dname() members
*/