void
_cedit_cmd_file_revert (GtkAction *action,
CeditWindow *window)
{
CeditTab *tab;
CeditDocument *doc;
GtkWidget *dialog;
GtkWindowGroup *wg;
cedit_debug (DEBUG_COMMANDS);
tab = cedit_window_get_active_tab (window);
g_return_if_fail (tab != NULL);
/* If we are already displaying a notification
* reverting will drop local modifications, do
* not bug the user further */
if (cedit_tab_get_state (tab) == CEDIT_TAB_STATE_EXTERNALLY_MODIFIED_NOTIFICATION)
{
do_revert (window, tab);
return;
}
doc = cedit_tab_get_document (tab);
g_return_if_fail (doc != NULL);
g_return_if_fail (!cedit_document_is_untitled (doc));
dialog = revert_dialog (window, doc);
wg = cedit_window_get_group (window);
gtk_window_group_add_window (wg, GTK_WINDOW (dialog));
gtk_window_set_modal (GTK_WINDOW (dialog), TRUE);
g_signal_connect (dialog,
"response",
G_CALLBACK (revert_dialog_response_cb),
window);
gtk_widget_show (dialog);
}
static void
revert_dialog_response_cb (GtkDialog *dialog,
gint response_id,
CeditWindow *window)
{
CeditTab *tab;
cedit_debug (DEBUG_COMMANDS);
/* FIXME: we are relying on the fact that the dialog is
modal so the active tab can't be changed...
not very nice - Paolo (Oct 11, 2005) */
tab = cedit_window_get_active_tab (window);
if (tab == NULL)
return;
gtk_widget_destroy (GTK_WIDGET (dialog));
if (response_id == GTK_RESPONSE_OK)
{
do_revert (window, tab);
}
}
int aufs_rmdir(struct inode *dir, struct dentry *dentry)
{
int err, rmdir_later;
aufs_bindex_t bwh, bindex, bstart;
struct au_dtime dt;
struct au_pin pin;
struct inode *inode;
struct dentry *parent, *wh_dentry, *h_dentry;
struct au_whtmp_rmdir *args;
IMustLock(dir);
err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN);
if (unlikely(err))
goto out;
err = au_alive_dir(dentry);
if (unlikely(err))
goto out_unlock;
inode = dentry->d_inode;
IMustLock(inode);
err = -ENOTDIR;
if (unlikely(!S_ISDIR(inode->i_mode)))
goto out_unlock; /* possible? */
err = -ENOMEM;
args = au_whtmp_rmdir_alloc(dir->i_sb, GFP_NOFS);
if (unlikely(!args))
goto out_unlock;
parent = dentry->d_parent; /* dir inode is locked */
di_write_lock_parent(parent);
err = au_test_empty(dentry, &args->whlist);
if (unlikely(err))
goto out_parent;
bstart = au_dbstart(dentry);
bwh = au_dbwh(dentry);
bindex = -1;
wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/1, &bindex, &dt, &pin);
err = PTR_ERR(wh_dentry);
if (IS_ERR(wh_dentry))
goto out_parent;
h_dentry = au_h_dptr(dentry, bstart);
dget(h_dentry);
rmdir_later = 0;
if (bindex == bstart) {
err = renwh_and_rmdir(dentry, bstart, &args->whlist, dir);
if (err > 0) {
rmdir_later = err;
err = 0;
}
} else {
/* stop monitoring */
au_hn_free(au_hi(inode, bstart));
/* dir inode is locked */
IMustLock(wh_dentry->d_parent->d_inode);
err = 0;
}
if (!err) {
vfsub_dead_dir(inode);
au_set_dbdiropq(dentry, -1);
epilog(dir, dentry, bindex);
if (rmdir_later) {
au_whtmp_kick_rmdir(dir, bstart, h_dentry, args);
args = NULL;
}
goto out_unpin; /* success */
}
/* revert */
AuLabel(revert);
if (wh_dentry) {
int rerr;
rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry, &dt);
if (rerr)
err = rerr;
}
out_unpin:
au_unpin(&pin);
dput(wh_dentry);
dput(h_dentry);
out_parent:
di_write_unlock(parent);
if (args)
au_whtmp_rmdir_free(args);
out_unlock:
aufs_read_unlock(dentry, AuLock_DW);
out:
AuTraceErr(err);
return err;
}
/*
* when an error happened, remove the created whiteout and revert everything.
*/
static int do_revert(int err, struct inode *dir, aufs_bindex_t bindex,
aufs_bindex_t bwh, struct dentry *wh_dentry,
struct dentry *dentry, struct au_dtime *dt)
{
int rerr;
struct path h_path = {
.dentry = wh_dentry,
.mnt = au_sbr_mnt(dir->i_sb, bindex)
};
rerr = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path, dentry);
if (!rerr) {
au_set_dbwh(dentry, bwh);
au_dtime_revert(dt);
return 0;
}
AuIOErr("%.*s reverting whiteout failed(%d, %d)\n",
AuDLNPair(dentry), err, rerr);
return -EIO;
}
/* ---------------------------------------------------------------------- */
int aufs_unlink(struct inode *dir, struct dentry *dentry)
{
int err;
aufs_bindex_t bwh, bindex, bstart;
struct au_dtime dt;
struct au_pin pin;
struct path h_path;
struct inode *inode, *h_dir;
struct dentry *parent, *wh_dentry;
IMustLock(dir);
err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN);
if (unlikely(err))
goto out;
err = au_d_hashed_positive(dentry);
if (unlikely(err))
goto out_unlock;
inode = dentry->d_inode;
IMustLock(inode);
err = -EISDIR;
if (unlikely(S_ISDIR(inode->i_mode)))
goto out_unlock; /* possible? */
bstart = au_dbstart(dentry);
bwh = au_dbwh(dentry);
bindex = -1;
parent = dentry->d_parent; /* dir inode is locked */
di_write_lock_parent(parent);
wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt, &pin);
err = PTR_ERR(wh_dentry);
if (IS_ERR(wh_dentry))
goto out_parent;
h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart);
h_path.dentry = au_h_dptr(dentry, bstart);
dget(h_path.dentry);
if (bindex == bstart) {
h_dir = au_pinned_h_dir(&pin);
err = vfsub_unlink(h_dir, &h_path, /*force*/0);
} else {
/* dir inode is locked */
h_dir = wh_dentry->d_parent->d_inode;
IMustLock(h_dir);
err = 0;
}
if (!err) {
vfsub_drop_nlink(inode);
epilog(dir, dentry, bindex);
/* update target timestamps */
if (bindex == bstart) {
vfsub_update_h_iattr(&h_path, /*did*/NULL); /*ignore*/
inode->i_ctime = h_path.dentry->d_inode->i_ctime;
} else
/* todo: this timestamp may be reverted later */
inode->i_ctime = h_dir->i_ctime;
goto out_unpin; /* success */
}
/* revert */
if (wh_dentry) {
int rerr;
rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry, &dt);
if (rerr)
err = rerr;
}
out_unpin:
au_unpin(&pin);
dput(wh_dentry);
dput(h_path.dentry);
out_parent:
di_write_unlock(parent);
out_unlock:
aufs_read_unlock(dentry, AuLock_DW);
out:
return err;
}
/*
* when an error happened, remove the created whiteout and revert everything.
*/
static int do_revert(int err, struct inode *dir, aufs_bindex_t bindex,
aufs_bindex_t bwh, struct dentry *wh_dentry,
struct dentry *dentry, struct au_dtime *dt)
{
int rerr;
struct path h_path = {
.dentry = wh_dentry,
.mnt = au_sbr_mnt(dir->i_sb, bindex)
};
rerr = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path, dentry);
if (!rerr) {
au_set_dbwh(dentry, bwh);
au_dtime_revert(dt);
return 0;
}
AuIOErr("%pd reverting whiteout failed(%d, %d)\n", dentry, err, rerr);
return -EIO;
}
/* ---------------------------------------------------------------------- */
int aufs_unlink(struct inode *dir, struct dentry *dentry)
{
int err;
aufs_bindex_t bwh, bindex, bstart;
struct inode *inode, *h_dir, *delegated;
struct dentry *parent, *wh_dentry;
/* to reuduce stack size */
struct {
struct au_dtime dt;
struct au_pin pin;
struct path h_path;
} *a;
IMustLock(dir);
err = -ENOMEM;
a = kmalloc(sizeof(*a), GFP_NOFS);
if (unlikely(!a))
goto out;
err = aufs_read_lock(dentry, AuLock_DW | AuLock_GEN);
if (unlikely(err))
goto out_free;
err = au_d_hashed_positive(dentry);
if (unlikely(err))
goto out_unlock;
inode = d_inode(dentry);
IMustLock(inode);
err = -EISDIR;
if (unlikely(d_is_dir(dentry)))
goto out_unlock; /* possible? */
bstart = au_dbstart(dentry);
bwh = au_dbwh(dentry);
bindex = -1;
parent = dentry->d_parent; /* dir inode is locked */
di_write_lock_parent(parent);
wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &a->dt,
&a->pin);
err = PTR_ERR(wh_dentry);
if (IS_ERR(wh_dentry))
goto out_parent;
a->h_path.mnt = au_sbr_mnt(dentry->d_sb, bstart);
a->h_path.dentry = au_h_dptr(dentry, bstart);
dget(a->h_path.dentry);
if (bindex == bstart) {
h_dir = au_pinned_h_dir(&a->pin);
delegated = NULL;
err = vfsub_unlink(h_dir, &a->h_path, &delegated, /*force*/0);
if (unlikely(err == -EWOULDBLOCK)) {
pr_warn("cannot retry for NFSv4 delegation"
" for an internal unlink\n");
iput(delegated);
}
} else {
/* dir inode is locked */
h_dir = d_inode(wh_dentry->d_parent);
IMustLock(h_dir);
err = 0;
}
if (!err) {
vfsub_drop_nlink(inode);
epilog(dir, dentry, bindex);
/* update target timestamps */
if (bindex == bstart) {
vfsub_update_h_iattr(&a->h_path, /*did*/NULL);
/*ignore*/
inode->i_ctime = d_inode(a->h_path.dentry)->i_ctime;
} else
/* todo: this timestamp may be reverted later */
inode->i_ctime = h_dir->i_ctime;
goto out_unpin; /* success */
}
/* revert */
if (wh_dentry) {
int rerr;
rerr = do_revert(err, dir, bindex, bwh, wh_dentry, dentry,
&a->dt);
if (rerr)
err = rerr;
}
out_unpin:
au_unpin(&a->pin);
dput(wh_dentry);
dput(a->h_path.dentry);
out_parent:
di_write_unlock(parent);
out_unlock:
aufs_read_unlock(dentry, AuLock_DW);
out_free:
kfree(a);
out:
return err;
}
int aufs_rmdir(struct inode *dir, struct dentry *dentry)
{
int err, rmdir_later;
struct inode *inode, *hidden_dir;
struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
struct dtime dt;
aufs_bindex_t bwh, bindex, bstart;
struct rmdir_whtmp_arg *arg;
struct aufs_nhash *whlist;
LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
IMustLock(dir);
inode = dentry->d_inode;
if (unlikely(!inode))
return -ENOENT; // possible?
IMustLock(inode);
whlist = nhash_new(GFP_KERNEL);
err = PTR_ERR(whlist);
if (IS_ERR(whlist))
goto out;
err = -ENOMEM;
arg = kmalloc(sizeof(*arg), GFP_KERNEL);
//arg = NULL;
if (unlikely(!arg))
goto out_whlist;
aufs_read_lock(dentry, AUFS_D_WLOCK);
parent = dentry->d_parent;
di_write_lock_parent(parent);
err = test_empty(dentry, whlist);
//err = -1;
if (unlikely(err))
goto out_arg;
bstart = dbstart(dentry);
bwh = dbwh(dentry);
bindex = -1;
wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/ 1, &bindex, &dt);
//wh_dentry = ERR_PTR(-1);
err = PTR_ERR(wh_dentry);
if (IS_ERR(wh_dentry))
goto out_arg;
hidden_dentry = au_h_dptr(dentry);
dget(hidden_dentry);
hidden_parent = hidden_dentry->d_parent;
hidden_dir = hidden_parent->d_inode;
rmdir_later = 0;
if (bindex == bstart) {
IMustLock(hidden_dir);
err = renwh_and_rmdir(dentry, bstart, whlist, dir);
//err = -1;
if (err > 0) {
rmdir_later = err;
err = 0;
}
} else {
DEBUG_ON(!wh_dentry);
hidden_parent = wh_dentry->d_parent;
DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
hidden_dir = hidden_parent->d_inode;
IMustLock(hidden_dir);
err = 0;
}
if (!err) {
au_reset_hinotify(inode, /*flags*/0);
inode->i_nlink = 0;
set_dbdiropq(dentry, -1);
epilog(dir, dentry, bindex);
if (rmdir_later) {
kick_rmdir_whtmp(hidden_dentry, whlist, bstart, dir,
inode, arg);
arg = NULL;
}
goto out_unlock; /* success */
}
/* revert */
LKTRLabel(revert);
if (wh_dentry) {
int rerr;
rerr = do_revert(err, wh_dentry, dentry, bwh, &dt,
need_dlgt(dir->i_sb));
if (rerr)
err = rerr;
}
out_unlock:
hdir_unlock(hidden_dir, dir, bindex);
dput(wh_dentry);
dput(hidden_dentry);
out_arg:
di_write_unlock(parent);
aufs_read_unlock(dentry, AUFS_D_WLOCK);
kfree(arg);
out_whlist:
nhash_del(whlist);
out:
TraceErr(err);
return err;
}
int aufs_unlink(struct inode *dir, struct dentry *dentry)
{
int err, dlgt;
struct inode *inode, *hidden_dir;
struct dentry *parent, *wh_dentry, *hidden_dentry, *hidden_parent;
struct dtime dt;
aufs_bindex_t bwh, bindex, bstart;
LKTRTrace("i%lu, %.*s\n", dir->i_ino, DLNPair(dentry));
IMustLock(dir);
inode = dentry->d_inode;
if (unlikely(!inode))
return -ENOENT; // possible?
IMustLock(inode);
aufs_read_lock(dentry, AUFS_D_WLOCK);
parent = dentry->d_parent;
di_write_lock_parent(parent);
bstart = dbstart(dentry);
bwh = dbwh(dentry);
bindex = -1;
wh_dentry = lock_hdir_create_wh(dentry, /*isdir*/0, &bindex, &dt);
//wh_dentry = ERR_PTR(-1);
err = PTR_ERR(wh_dentry);
if (IS_ERR(wh_dentry))
goto out;
dlgt = need_dlgt(dir->i_sb);
hidden_dentry = au_h_dptr(dentry);
dget(hidden_dentry);
hidden_parent = hidden_dentry->d_parent;
hidden_dir = hidden_parent->d_inode;
if (bindex == bstart) {
err = vfsub_unlink(hidden_dir, hidden_dentry, dlgt);
//err = -1;
} else {
DEBUG_ON(!wh_dentry);
hidden_parent = wh_dentry->d_parent;
DEBUG_ON(hidden_parent != au_h_dptr_i(parent, bindex));
hidden_dir = hidden_parent->d_inode;
IMustLock(hidden_dir);
err = 0;
}
if (!err) {
inode->i_nlink--;
epilog(dir, dentry, bindex);
goto out_unlock; /* success */
}
/* revert */
if (wh_dentry) {
int rerr;
rerr = do_revert(err, wh_dentry, dentry, bwh, &dt, dlgt);
if (rerr)
err = rerr;
}
out_unlock:
hdir_unlock(hidden_dir, dir, bindex);
dput(wh_dentry);
dput(hidden_dentry);
out:
di_write_unlock(parent);
aufs_read_unlock(dentry, AUFS_D_WLOCK);
TraceErr(err);
return err;
}
