ecryptfs: Fix refcnt leak on ecryptfs_follow_link() error path

[safe/jmp/linux-2.6] / fs / gfs2 / rgrp.c

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 388a61d..0608f49 100644 (file)
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -179,7 +179,7 @@ static inline u64 gfs2_bit_search(const __le64 *ptr, u64 mask, u8 state)
  * always aligned to a 64 bit boundary.
  *
  * The size of the buffer is in bytes, but is it assumed that it is
- * always ok to to read a complete multiple of 64 bits at the end
+ * always ok to read a complete multiple of 64 bits at the end
  * of the block in case the end is no aligned to a natural boundary.
  *
  * Return: the block number (bitmap buffer scope) that was found
@@ -857,7 +857,8 @@ static void gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
                                        goto start_new_extent;
                                if ((start + nr_sects) != blk) {
                                        rv = blkdev_issue_discard(bdev, start,
-                                                           nr_sects, GFP_NOFS);
+                                                           nr_sects, GFP_NOFS,
+                                                           DISCARD_FL_BARRIER);
                                        if (rv)
                                                goto fail;
                                        nr_sects = 0;
@@ -871,7 +872,8 @@ start_new_extent:
                }
        }
        if (nr_sects) {
-               rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS);
+               rv = blkdev_issue_discard(bdev, start, nr_sects, GFP_NOFS,
+                                        DISCARD_FL_BARRIER);
                if (rv)
                        goto fail;
        }
@@ -1256,7 +1258,7 @@ void gfs2_inplace_release(struct gfs2_inode *ip)
  * Returns: The block type (GFS2_BLKST_*)
  */
 
-unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
+static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
 {
        struct gfs2_bitmap *bi = NULL;
        u32 length, rgrp_block, buf_block;
@@ -1463,7 +1465,7 @@ static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd)
 {
        struct gfs2_sbd *sdp = rgd->rd_sbd;
        fs_warn(sdp, "rgrp %llu has an error, marking it readonly until umount\n",
-               (unsigned long long)rgd->rd_addr);
+               (unsigned long long)rgd->rd_addr);
        fs_warn(sdp, "umount on all nodes and run fsck.gfs2 to fix the error\n");
        gfs2_rgrp_dump(NULL, rgd->rd_gl);
        rgd->rd_flags |= GFS2_RDF_ERROR;
@@ -1694,6 +1696,52 @@ void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
 }
 
 /**
+ * gfs2_check_blk_type - Check the type of a block
+ * @sdp: The superblock
+ * @no_addr: The block number to check
+ * @type: The block type we are looking for
+ *
+ * Returns: 0 if the block type matches the expected type
+ *          -ESTALE if it doesn't match
+ *          or -ve errno if something went wrong while checking
+ */
+
+int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, unsigned int type)
+{
+       struct gfs2_rgrpd *rgd;
+       struct gfs2_holder ri_gh, rgd_gh;
+       struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
+       int ri_locked = 0;
+       int error;
+
+       if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
+               error = gfs2_rindex_hold(sdp, &ri_gh);
+               if (error)
+                       goto fail;
+               ri_locked = 1;
+       }
+
+       error = -EINVAL;
+       rgd = gfs2_blk2rgrpd(sdp, no_addr);
+       if (!rgd)
+               goto fail_rindex;
+
+       error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_SHARED, 0, &rgd_gh);
+       if (error)
+               goto fail_rindex;
+
+       if (gfs2_get_block_type(rgd, no_addr) != type)
+               error = -ESTALE;
+
+       gfs2_glock_dq_uninit(&rgd_gh);
+fail_rindex:
+       if (ri_locked)
+               gfs2_glock_dq_uninit(&ri_gh);
+fail:
+       return error;
+}
+
+/**
  * gfs2_rlist_add - add a RG to a list of RGs
  * @sdp: the filesystem
  * @rlist: the list of resource groups