lockd: dont return EAGAIN for a permanent error

[pandora-kernel.git] / fs / xfs / xfs_rtalloc.c

diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index ca83ddf..a0dc6e5 100644 (file)
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -44,6 +44,7 @@
 #include "xfs_rw.h"
 #include "xfs_inode_item.h"
 #include "xfs_trans_space.h"
+#include "xfs_utils.h"
 
 
 /*
@@ -72,6 +73,18 @@ STATIC int xfs_rtmodify_summary(xfs_mount_t *, xfs_trans_t *, int,
  * Internal functions.
  */
 
+/*
+ * xfs_lowbit32: get low bit set out of 32-bit argument, -1 if none set.
+ */
+STATIC int
+xfs_lowbit32(
+       __uint32_t      v)
+{
+       if (v)
+               return ffs(v) - 1;
+       return -1;
+}
+
 /*
  * Allocate space to the bitmap or summary file, and zero it, for growfs.
  */
@@ -111,14 +124,14 @@ xfs_growfs_rt_alloc(
                                XFS_GROWRTALLOC_LOG_RES(mp), 0,
                                XFS_TRANS_PERM_LOG_RES,
                                XFS_DEFAULT_PERM_LOG_COUNT)))
-                       goto error_exit;
+                       goto error_cancel;
                cancelflags = XFS_TRANS_RELEASE_LOG_RES;
                /*
                 * Lock the inode.
                 */
                if ((error = xfs_trans_iget(mp, tp, ino, 0,
                                                XFS_ILOCK_EXCL, &ip)))
-                       goto error_exit;
+                       goto error_cancel;
                XFS_BMAP_INIT(&flist, &firstblock);
                /*
                 * Allocate blocks to the bitmap file.
@@ -131,14 +144,16 @@ xfs_growfs_rt_alloc(
                if (!error && nmap < 1)
                        error = XFS_ERROR(ENOSPC);
                if (error)
-                       goto error_exit;
+                       goto error_cancel;
                /*
                 * Free any blocks freed up in the transaction, then commit.
                 */
                error = xfs_bmap_finish(&tp, &flist, &committed);
                if (error)
-                       goto error_exit;
-               xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+                       goto error_cancel;
+               error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+               if (error)
+                       goto error;
                /*
                 * Now we need to clear the allocated blocks.
                 * Do this one block per transaction, to keep it simple.
@@ -153,13 +168,13 @@ xfs_growfs_rt_alloc(
                         */
                        if ((error = xfs_trans_reserve(tp, 0,
                                        XFS_GROWRTZERO_LOG_RES(mp), 0, 0, 0)))
-                               goto error_exit;
+                               goto error_cancel;
                        /*
                         * Lock the bitmap inode.
                         */
                        if ((error = xfs_trans_iget(mp, tp, ino, 0,
                                                        XFS_ILOCK_EXCL, &ip)))
-                               goto error_exit;
+                               goto error_cancel;
                        /*
                         * Get a buffer for the block.
                         */
@@ -168,14 +183,16 @@ xfs_growfs_rt_alloc(
                                mp->m_bsize, 0);
                        if (bp == NULL) {
                                error = XFS_ERROR(EIO);
-                               goto error_exit;
+                               goto error_cancel;
                        }
                        memset(XFS_BUF_PTR(bp), 0, mp->m_sb.sb_blocksize);
                        xfs_trans_log_buf(tp, bp, 0, mp->m_sb.sb_blocksize - 1);
                        /*
                         * Commit the transaction.
                         */
-                       xfs_trans_commit(tp, 0);
+                       error = xfs_trans_commit(tp, 0);
+                       if (error)
+                               goto error;
                }
                /*
                 * Go on to the next extent, if any.
@@ -183,8 +200,9 @@ xfs_growfs_rt_alloc(
                oblocks = map.br_startoff + map.br_blockcount;
        }
        return 0;
-error_exit:
+error_cancel:
        xfs_trans_cancel(tp, cancelflags);
+error:
        return error;
 }
 
@@ -432,7 +450,6 @@ xfs_rtallocate_extent_near(
        }
        bbno = XFS_BITTOBLOCK(mp, bno);
        i = 0;
-       ASSERT(minlen != 0);
        log2len = xfs_highbit32(minlen);
        /*
         * Loop over all bitmap blocks (bbno + i is current block).
@@ -601,8 +618,6 @@ xfs_rtallocate_extent_size(
        xfs_suminfo_t   sum;            /* summary information for extents */
 
        ASSERT(minlen % prod == 0 && maxlen % prod == 0);
-       ASSERT(maxlen != 0);
-
        /*
         * Loop over all the levels starting with maxlen.
         * At each level, look at all the bitmap blocks, to see if there
@@ -660,9 +675,6 @@ xfs_rtallocate_extent_size(
                *rtblock = NULLRTBLOCK;
                return 0;
        }
-       ASSERT(minlen != 0);
-       ASSERT(maxlen != 0);
-
        /*
         * Loop over sizes, from maxlen down to minlen.
         * This time, when we do the allocations, allow smaller ones
@@ -1869,6 +1881,7 @@ xfs_growfs_rt(
        xfs_trans_t     *tp;            /* transaction pointer */
 
        sbp = &mp->m_sb;
+       cancelflags = 0;
        /*
         * Initial error checking.
         */
@@ -1948,7 +1961,6 @@ xfs_growfs_rt(
                                  nsbp->sb_blocksize * nsbp->sb_rextsize);
                nsbp->sb_rextents = nsbp->sb_rblocks;
                do_div(nsbp->sb_rextents, nsbp->sb_rextsize);
-               ASSERT(nsbp->sb_rextents != 0);
                nsbp->sb_rextslog = xfs_highbit32(nsbp->sb_rextents);
                nrsumlevels = nmp->m_rsumlevels = nsbp->sb_rextslog + 1;
                nrsumsize =
@@ -2036,13 +2048,15 @@ xfs_growfs_rt(
                 */
                mp->m_rsumlevels = nrsumlevels;
                mp->m_rsumsize = nrsumsize;
-               /*
-                * Commit the transaction.
-                */
-               xfs_trans_commit(tp, 0);
+
+               error = xfs_trans_commit(tp, 0);
+               if (error) {
+                       tp = NULL;
+                       break;
+               }
        }
 
-       if (error)
+       if (error && tp)
                xfs_trans_cancel(tp, cancelflags);
 
        /*
@@ -2273,7 +2287,7 @@ xfs_rtmount_inodes(
        ASSERT(sbp->sb_rsumino != NULLFSINO);
        error = xfs_iget(mp, NULL, sbp->sb_rsumino, 0, 0, &mp->m_rsumip, 0);
        if (error) {
-               VN_RELE(XFS_ITOV(mp->m_rbmip));
+               IRELE(mp->m_rbmip);
                return error;
        }
        ASSERT(mp->m_rsumip != NULL);