#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/namei.h>
-#include <linux/quotaops.h>
#include <linux/pagemap.h>
#include <linux/fsnotify.h>
#include <linux/personality.h>
static inline void path_to_nameidata(struct path *path, struct nameidata *nd)
{
dput(nd->path.dentry);
- if (nd->path.mnt != path->mnt)
+ if (nd->path.mnt != path->mnt) {
mntput(nd->path.mnt);
- nd->path.mnt = path->mnt;
+ nd->path.mnt = path->mnt;
+ }
nd->path.dentry = path->dentry;
}
return inode_permission(dir, MAY_WRITE | MAY_EXEC);
}
-/*
- * O_DIRECTORY translates into forcing a directory lookup.
- */
-static inline int lookup_flags(unsigned int f)
-{
- unsigned long retval = LOOKUP_FOLLOW;
-
- if (f & O_NOFOLLOW)
- retval &= ~LOOKUP_FOLLOW;
-
- if (f & O_DIRECTORY)
- retval |= LOOKUP_DIRECTORY;
-
- return retval;
-}
-
/*
* p1 and p2 should be directories on the same fs.
*/
error = security_inode_create(dir, dentry, mode);
if (error)
return error;
- vfs_dq_init(dir);
error = dir->i_op->create(dir, dentry, mode, nd);
if (!error)
fsnotify_create(dir, dentry);
}
}
if (!IS_ERR(filp)) {
- if (acc_mode & MAY_WRITE)
- vfs_dq_init(nd->path.dentry->d_inode);
-
if (will_truncate) {
error = handle_truncate(&nd->path);
if (error) {
{
struct dentry *dir = nd->path.dentry;
struct file *filp;
- int error;
+ int error = -EISDIR;
- if (nd->last_type == LAST_BIND)
+ switch (nd->last_type) {
+ case LAST_DOTDOT:
+ follow_dotdot(nd);
+ dir = nd->path.dentry;
+ case LAST_DOT:
+ if (nd->path.mnt->mnt_sb->s_type->fs_flags & FS_REVAL_DOT) {
+ if (!dir->d_op->d_revalidate(dir, nd)) {
+ error = -ESTALE;
+ goto exit;
+ }
+ }
+ /* fallthrough */
+ case LAST_ROOT:
+ if (open_flag & O_CREAT)
+ goto exit;
+ /* fallthrough */
+ case LAST_BIND:
+ audit_inode(pathname, dir);
goto ok;
+ }
- error = -EISDIR;
- if (nd->last_type != LAST_NORM || nd->last.name[nd->last.len])
- goto exit;
+ /* trailing slashes? */
+ if (nd->last.name[nd->last.len]) {
+ if (open_flag & O_CREAT)
+ goto exit;
+ nd->flags |= LOOKUP_DIRECTORY | LOOKUP_FOLLOW;
+ }
+
+ /* just plain open? */
+ if (!(open_flag & O_CREAT)) {
+ error = do_lookup(nd, &nd->last, path);
+ if (error)
+ goto exit;
+ error = -ENOENT;
+ if (!path->dentry->d_inode)
+ goto exit_dput;
+ if (path->dentry->d_inode->i_op->follow_link)
+ return NULL;
+ error = -ENOTDIR;
+ if (nd->flags & LOOKUP_DIRECTORY) {
+ if (!path->dentry->d_inode->i_op->lookup)
+ goto exit_dput;
+ }
+ path_to_nameidata(path, nd);
+ audit_inode(pathname, nd->path.dentry);
+ goto ok;
+ }
+ /* OK, it's O_CREAT */
mutex_lock(&dir->d_inode->i_mutex);
path->dentry = lookup_hash(nd);
int flag = open_to_namei_flags(open_flag);
int force_reval = 0;
+ if (!(open_flag & O_CREAT))
+ mode = 0;
+
/*
* O_SYNC is implemented as __O_SYNC|O_DSYNC. As many places only
* check for O_DSYNC if the need any syncing at all we enforce it's
if (open_flag & O_APPEND)
acc_mode |= MAY_APPEND;
- /*
- * The simplest case - just a plain lookup.
- */
- if (!(open_flag & O_CREAT)) {
- filp = get_empty_filp();
-
- if (filp == NULL)
- return ERR_PTR(-ENFILE);
- nd.intent.open.file = filp;
- filp->f_flags = open_flag;
- nd.intent.open.flags = flag;
- nd.intent.open.create_mode = 0;
- error = do_path_lookup(dfd, pathname,
- lookup_flags(open_flag)|LOOKUP_OPEN, &nd);
- if (IS_ERR(nd.intent.open.file)) {
- if (error == 0) {
- error = PTR_ERR(nd.intent.open.file);
- path_put(&nd.path);
- }
- } else if (error)
- release_open_intent(&nd);
- if (error)
- return ERR_PTR(error);
- return finish_open(&nd, open_flag, acc_mode);
- }
-
- /*
- * Create - we need to know the parent.
- */
+ /* find the parent */
reval:
error = path_init(dfd, pathname, LOOKUP_PARENT, &nd);
if (error)
filp = ERR_PTR(error);
goto out;
}
- if (unlikely(!audit_dummy_context()))
+ if (unlikely(!audit_dummy_context()) && (open_flag & O_CREAT))
audit_inode(pathname, nd.path.dentry);
/*
nd.intent.open.flags = flag;
nd.intent.open.create_mode = mode;
nd.flags &= ~LOOKUP_PARENT;
- nd.flags |= LOOKUP_CREATE | LOOKUP_OPEN;
- if (open_flag & O_EXCL)
- nd.flags |= LOOKUP_EXCL;
+ nd.flags |= LOOKUP_OPEN;
+ if (open_flag & O_CREAT) {
+ nd.flags |= LOOKUP_CREATE;
+ if (open_flag & O_EXCL)
+ nd.flags |= LOOKUP_EXCL;
+ }
+ if (open_flag & O_DIRECTORY)
+ nd.flags |= LOOKUP_DIRECTORY;
+ if (!(open_flag & O_NOFOLLOW))
+ nd.flags |= LOOKUP_FOLLOW;
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
while (unlikely(!filp)) { /* trailing symlink */
struct path holder;
- struct inode *inode;
+ struct inode *inode = path.dentry->d_inode;
void *cookie;
error = -ELOOP;
- if ((open_flag & O_NOFOLLOW) || count++ == 32)
+ /* S_ISDIR part is a temporary automount kludge */
+ if (!(nd.flags & LOOKUP_FOLLOW) && !S_ISDIR(inode->i_mode))
+ goto exit_dput;
+ if (count++ == 32)
goto exit_dput;
/*
* This is subtle. Instead of calling do_follow_link() we do
error = __do_follow_link(&path, &nd, &cookie);
if (unlikely(error)) {
/* nd.path had been dropped */
- inode = path.dentry->d_inode;
if (!IS_ERR(cookie) && inode->i_op->put_link)
inode->i_op->put_link(path.dentry, &nd, cookie);
path_put(&path);
holder = path;
nd.flags &= ~LOOKUP_PARENT;
filp = do_last(&nd, &path, open_flag, acc_mode, mode, pathname);
- inode = holder.dentry->d_inode;
if (inode->i_op->put_link)
inode->i_op->put_link(holder.dentry, &nd, cookie);
path_put(&holder);
if (error)
return error;
- vfs_dq_init(dir);
error = dir->i_op->mknod(dir, dentry, mode, dev);
if (!error)
fsnotify_create(dir, dentry);
if (error)
return error;
- vfs_dq_init(dir);
error = dir->i_op->mkdir(dir, dentry, mode);
if (!error)
fsnotify_mkdir(dir, dentry);
if (!dir->i_op->rmdir)
return -EPERM;
- vfs_dq_init(dir);
-
mutex_lock(&dentry->d_inode->i_mutex);
dentry_unhash(dentry);
if (d_mountpoint(dentry))
error = security_inode_rmdir(dir, dentry);
if (!error) {
error = dir->i_op->rmdir(dir, dentry);
- if (!error)
+ if (!error) {
dentry->d_inode->i_flags |= S_DEAD;
+ dont_mount(dentry);
+ }
}
}
mutex_unlock(&dentry->d_inode->i_mutex);
if (!dir->i_op->unlink)
return -EPERM;
- vfs_dq_init(dir);
-
mutex_lock(&dentry->d_inode->i_mutex);
if (d_mountpoint(dentry))
error = -EBUSY;
if (!error) {
error = dir->i_op->unlink(dir, dentry);
if (!error)
- dentry->d_inode->i_flags |= S_DEAD;
+ dont_mount(dentry);
}
}
mutex_unlock(&dentry->d_inode->i_mutex);
if (error)
return error;
- vfs_dq_init(dir);
error = dir->i_op->symlink(dir, dentry, oldname);
if (!error)
fsnotify_create(dir, dentry);
return error;
mutex_lock(&inode->i_mutex);
- vfs_dq_init(dir);
error = dir->i_op->link(old_dentry, dir, new_dentry);
mutex_unlock(&inode->i_mutex);
if (!error)
* e) conversion from fhandle to dentry may come in the wrong moment - when
* we are removing the target. Solution: we will have to grab ->i_mutex
* in the fhandle_to_dentry code. [FIXME - current nfsfh.c relies on
- * ->i_mutex on parents, which works but leads to some truely excessive
+ * ->i_mutex on parents, which works but leads to some truly excessive
* locking].
*/
static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
return error;
target = new_dentry->d_inode;
- if (target) {
+ if (target)
mutex_lock(&target->i_mutex);
- dentry_unhash(new_dentry);
- }
if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
error = -EBUSY;
- else
+ else {
+ if (target)
+ dentry_unhash(new_dentry);
error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
+ }
if (target) {
- if (!error)
+ if (!error) {
target->i_flags |= S_DEAD;
+ dont_mount(new_dentry);
+ }
mutex_unlock(&target->i_mutex);
if (d_unhashed(new_dentry))
d_rehash(new_dentry);
error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
if (!error) {
if (target)
- target->i_flags |= S_DEAD;
+ dont_mount(new_dentry);
if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
d_move(old_dentry, new_dentry);
}
if (!old_dir->i_op->rename)
return -EPERM;
- vfs_dq_init(old_dir);
- vfs_dq_init(new_dir);
-
old_name = fsnotify_oldname_init(old_dentry->d_name.name);
if (is_dir)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff