[GFS2] don't call permission()

[linux-2.6] / fs / gfs2 / ops_file.c

diff --git a/fs/gfs2/ops_file.c b/fs/gfs2/ops_file.c
index 0ff512a1192523ea5306c2aa286fde09484540d0..1737af98a4209bd7a11b11f6539bcd23fd9853b2 100644 (file)
--- a/fs/gfs2/ops_file.c
+++ b/fs/gfs2/ops_file.c
@@ -15,6 +15,7 @@
 #include <linux/uio.h>
 #include <linux/blkdev.h>
 #include <linux/mm.h>
+#include <linux/mount.h>
 #include <linux/fs.h>
 #include <linux/gfs2_ondisk.h>
 #include <linux/ext2_fs.h>
@@ -220,10 +221,14 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
        int error;
        u32 new_flags, flags;
 
-       error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+       error = mnt_want_write(filp->f_path.mnt);
        if (error)
                return error;
 
+       error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+       if (error)
+               goto out_drop_write;
+
        flags = ip->i_di.di_flags;
        new_flags = (flags & ~mask) | (reqflags & mask);
        if ((new_flags ^ flags) == 0)
@@ -242,7 +247,7 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
            !capable(CAP_LINUX_IMMUTABLE))
                goto out;
        if (!IS_IMMUTABLE(inode)) {
-               error = permission(inode, MAY_WRITE, NULL);
+               error = gfs2_permission(inode, MAY_WRITE);
                if (error)
                        goto out;
        }
@@ -272,6 +277,8 @@ out_trans_end:
        gfs2_trans_end(sdp);
 out:
        gfs2_glock_dq_uninit(&gh);
+out_drop_write:
+       mnt_drop_write(filp->f_path.mnt);
        return error;
 }