#include <linux/swap.h>
#include <linux/bootmem.h>
#include <linux/fs_struct.h>
+#include <linux/hardirq.h>
#include "internal.h"
int sysctl_vfs_cache_pressure __read_mostly = 100;
if (dentry)
goto repeat;
}
+EXPORT_SYMBOL(dput);
/**
* d_invalidate - invalidate a dentry
spin_unlock(&dcache_lock);
return 0;
}
+EXPORT_SYMBOL(d_invalidate);
/* This should be called _only_ with dcache_lock held */
{
return __dget_locked(dentry);
}
+EXPORT_SYMBOL(dget_locked);
/**
* d_find_alias - grab a hashed alias of inode
}
return de;
}
+EXPORT_SYMBOL(d_find_alias);
/*
* Try to kill dentries associated with this inode.
}
spin_unlock(&dcache_lock);
}
+EXPORT_SYMBOL(d_prune_aliases);
/*
* Throw away a dentry - free the inode, dput the parent. This requires that
*/
static void prune_dcache(int count)
{
- struct super_block *sb;
+ struct super_block *sb, *n;
int w_count;
int unused = dentry_stat.nr_unused;
int prune_ratio;
if (unused == 0 || count == 0)
return;
spin_lock(&dcache_lock);
-restart:
if (count >= unused)
prune_ratio = 1;
else
prune_ratio = unused / count;
spin_lock(&sb_lock);
- list_for_each_entry(sb, &super_blocks, s_list) {
+ list_for_each_entry_safe(sb, n, &super_blocks, s_list) {
+ if (list_empty(&sb->s_instances))
+ continue;
if (sb->s_nr_dentry_unused == 0)
continue;
sb->s_count++;
}
spin_lock(&sb_lock);
count -= pruned;
- /*
- * restart only when sb is no longer on the list and
- * we have more work to do.
- */
- if (__put_super_and_need_restart(sb) && count > 0) {
- spin_unlock(&sb_lock);
- goto restart;
- }
+ __put_super(sb);
+ /* more work left to do? */
+ if (count <= 0)
+ break;
}
spin_unlock(&sb_lock);
spin_unlock(&dcache_lock);
{
__shrink_dcache_sb(sb, NULL, 0);
}
+EXPORT_SYMBOL(shrink_dcache_sb);
/*
* destroy a single subtree of dentries for unmount
spin_unlock(&dcache_lock);
return 1;
}
+EXPORT_SYMBOL(have_submounts);
/*
* Search the dentry child list for the specified parent,
while ((found = select_parent(parent)) != 0)
__shrink_dcache_sb(sb, &found, 0);
}
+EXPORT_SYMBOL(shrink_dcache_parent);
/*
* Scan `nr' dentries and return the number which remain.
return dentry;
}
+EXPORT_SYMBOL(d_alloc);
struct dentry *d_alloc_name(struct dentry *parent, const char *name)
{
q.hash = full_name_hash(q.name, q.len);
return d_alloc(parent, &q);
}
+EXPORT_SYMBOL(d_alloc_name);
/* the caller must hold dcache_lock */
static void __d_instantiate(struct dentry *dentry, struct inode *inode)
spin_unlock(&dcache_lock);
security_d_instantiate(entry, inode);
}
+EXPORT_SYMBOL(d_instantiate);
/**
* d_instantiate_unique - instantiate a non-aliased dentry
}
return res;
}
+EXPORT_SYMBOL(d_alloc_root);
static inline struct hlist_head *d_hash(struct dentry *parent,
unsigned long hash)
BUG_ON(!(new->d_flags & DCACHE_DISCONNECTED));
spin_unlock(&dcache_lock);
security_d_instantiate(new, inode);
- d_rehash(dentry);
d_move(new, dentry);
iput(inode);
} else {
d_add(dentry, inode);
return new;
}
+EXPORT_SYMBOL(d_splice_alias);
/**
* d_add_ci - lookup or allocate new dentry with case-exact name
iput(inode);
return ERR_PTR(error);
}
+EXPORT_SYMBOL(d_add_ci);
/**
* d_lookup - search for a dentry
} while (read_seqretry(&rename_lock, seq));
return dentry;
}
+EXPORT_SYMBOL(d_lookup);
struct dentry * __d_lookup(struct dentry * parent, struct qstr * name)
{
out:
return 0;
}
+EXPORT_SYMBOL(d_validate);
/*
* When a file is deleted, we have two options:
spin_lock(&dentry->d_lock);
isdir = S_ISDIR(dentry->d_inode->i_mode);
if (atomic_read(&dentry->d_count) == 1) {
+ dentry->d_flags &= ~DCACHE_CANT_MOUNT;
dentry_iput(dentry);
fsnotify_nameremove(dentry, isdir);
return;
fsnotify_nameremove(dentry, isdir);
}
+EXPORT_SYMBOL(d_delete);
static void __d_rehash(struct dentry * entry, struct hlist_head *list)
{
spin_unlock(&entry->d_lock);
spin_unlock(&dcache_lock);
}
+EXPORT_SYMBOL(d_rehash);
/*
* When switching names, the actual string doesn't strictly have to
d_move_locked(dentry, target);
spin_unlock(&dcache_lock);
}
+EXPORT_SYMBOL(d_move);
/**
* d_ancestor - search for an ancestor
spin_unlock(&dcache_lock);
BUG();
}
+EXPORT_SYMBOL_GPL(d_materialise_unique);
static int prepend(char **buffer, int *buflen, const char *str, int namelen)
{
spin_lock(&vfsmount_lock);
prepend(&end, &buflen, "\0", 1);
- if (!IS_ROOT(dentry) && d_unhashed(dentry) &&
+ if (d_unlinked(dentry) &&
(prepend(&end, &buflen, " (deleted)", 10) != 0))
goto Elong;
path_put(&root);
return res;
}
+EXPORT_SYMBOL(d_path);
/*
* Helper function for dentry_operations.d_dname() members
spin_lock(&dcache_lock);
prepend(&end, &buflen, "\0", 1);
- if (!IS_ROOT(dentry) && d_unhashed(dentry) &&
+ if (d_unlinked(dentry) &&
(prepend(&end, &buflen, "//deleted", 9) != 0))
goto Elong;
if (buflen < 1)
read_unlock(¤t->fs->lock);
error = -ENOENT;
- /* Has the current directory has been unlinked? */
spin_lock(&dcache_lock);
- if (IS_ROOT(pwd.dentry) || !d_unhashed(pwd.dentry)) {
+ if (!d_unlinked(pwd.dentry)) {
unsigned long len;
struct path tmp = root;
char * cwd;
return result;
}
+int path_is_under(struct path *path1, struct path *path2)
+{
+ struct vfsmount *mnt = path1->mnt;
+ struct dentry *dentry = path1->dentry;
+ int res;
+ spin_lock(&vfsmount_lock);
+ if (mnt != path2->mnt) {
+ for (;;) {
+ if (mnt->mnt_parent == mnt) {
+ spin_unlock(&vfsmount_lock);
+ return 0;
+ }
+ if (mnt->mnt_parent == path2->mnt)
+ break;
+ mnt = mnt->mnt_parent;
+ }
+ dentry = mnt->mnt_mountpoint;
+ }
+ res = is_subdir(dentry, path2->dentry);
+ spin_unlock(&vfsmount_lock);
+ return res;
+}
+EXPORT_SYMBOL(path_is_under);
+
void d_genocide(struct dentry *root)
{
struct dentry *this_parent = root;
}
return ino;
}
+EXPORT_SYMBOL(find_inode_number);
static __initdata unsigned long dhash_entries;
static int __init set_dhash_entries(char *str)
/* SLAB cache for __getname() consumers */
struct kmem_cache *names_cachep __read_mostly;
+EXPORT_SYMBOL(names_cachep);
EXPORT_SYMBOL(d_genocide);
bdev_cache_init();
chrdev_init();
}
-
-EXPORT_SYMBOL(d_alloc);
-EXPORT_SYMBOL(d_alloc_root);
-EXPORT_SYMBOL(d_delete);
-EXPORT_SYMBOL(d_find_alias);
-EXPORT_SYMBOL(d_instantiate);
-EXPORT_SYMBOL(d_invalidate);
-EXPORT_SYMBOL(d_lookup);
-EXPORT_SYMBOL(d_move);
-EXPORT_SYMBOL_GPL(d_materialise_unique);
-EXPORT_SYMBOL(d_path);
-EXPORT_SYMBOL(d_prune_aliases);
-EXPORT_SYMBOL(d_rehash);
-EXPORT_SYMBOL(d_splice_alias);
-EXPORT_SYMBOL(d_add_ci);
-EXPORT_SYMBOL(d_validate);
-EXPORT_SYMBOL(dget_locked);
-EXPORT_SYMBOL(dput);
-EXPORT_SYMBOL(find_inode_number);
-EXPORT_SYMBOL(have_submounts);
-EXPORT_SYMBOL(names_cachep);
-EXPORT_SYMBOL(shrink_dcache_parent);
-EXPORT_SYMBOL(shrink_dcache_sb);