X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=fs%2Fubifs%2Ffile.c;h=3d698e2022b1ee7b2c8250fc75c89fff79785097;hb=9def255631bb742264d334d77819e1ae5278a515;hp=8565e586e533bdafae604abfda4d06b369025bb9;hpb=b0e0c9e7f6d5764633e93944dafd896dd6097318;p=linux-2.6-omap-h63xx.git

diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 8565e586e53..3d698e2022b 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -793,7 +793,7 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode,
 	int err;
 	struct ubifs_budget_req req;
 	loff_t old_size = inode->i_size, new_size = attr->ia_size;
-	int offset = new_size & (UBIFS_BLOCK_SIZE - 1);
+	int offset = new_size & (UBIFS_BLOCK_SIZE - 1), budgeted = 1;
 	struct ubifs_inode *ui = ubifs_inode(inode);
 
 	dbg_gen("ino %lu, size %lld -> %lld", inode->i_ino, old_size, new_size);
@@ -811,8 +811,15 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode,
 	/* A funny way to budget for truncation node */
 	req.dirtied_ino_d = UBIFS_TRUN_NODE_SZ;
 	err = ubifs_budget_space(c, &req);
-	if (err)
-		return err;
+	if (err) {
+		/*
+		 * Treat truncations to zero as deletion and always allow them,
+		 * just like we do for '->unlink()'.
+		 */
+		if (new_size || err != -ENOSPC)
+			return err;
+		budgeted = 0;
+	}
 
 	err = vmtruncate(inode, new_size);
 	if (err)
@@ -869,7 +876,12 @@ static int do_truncation(struct ubifs_info *c, struct inode *inode,
 	err = ubifs_jnl_truncate(c, inode, old_size, new_size);
 	mutex_unlock(&ui->ui_mutex);
 out_budg:
-	ubifs_release_budget(c, &req);
+	if (budgeted)
+		ubifs_release_budget(c, &req);
+	else {
+		c->nospace = c->nospace_rp = 0;
+		smp_wmb();
+	}
 	return err;
 }
 
@@ -890,7 +902,7 @@ static int do_setattr(struct ubifs_info *c, struct inode *inode,
 	loff_t new_size = attr->ia_size;
 	struct ubifs_inode *ui = ubifs_inode(inode);
 	struct ubifs_budget_req req = { .dirtied_ino = 1,
-					.dirtied_ino_d = ui->data_len };
+				.dirtied_ino_d = ALIGN(ui->data_len, 8) };
 
 	err = ubifs_budget_space(c, &req);
 	if (err)
@@ -941,7 +953,8 @@ int ubifs_setattr(struct dentry *dentry, struct iattr *attr)
 	struct inode *inode = dentry->d_inode;
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
 
-	dbg_gen("ino %lu, ia_valid %#x", inode->i_ino, attr->ia_valid);
+	dbg_gen("ino %lu, mode %#x, ia_valid %#x",
+		inode->i_ino, inode->i_mode, attr->ia_valid);
 	err = inode_change_ok(inode, attr);
 	if (err)
 		return err;
@@ -1051,7 +1064,7 @@ static int update_mctime(struct ubifs_info *c, struct inode *inode)
 	if (mctime_update_needed(inode, &now)) {
 		int err, release;
 		struct ubifs_budget_req req = { .dirtied_ino = 1,
-						.dirtied_ino_d = ui->data_len };
+				.dirtied_ino_d = ALIGN(ui->data_len, 8) };
 
 		err = ubifs_budget_space(c, &req);
 		if (err)
@@ -1270,6 +1283,7 @@ struct file_operations ubifs_file_operations = {
 	.fsync          = ubifs_fsync,
 	.unlocked_ioctl = ubifs_ioctl,
 	.splice_read	= generic_file_splice_read,
+	.splice_write	= generic_file_splice_write,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = ubifs_compat_ioctl,
 #endif