[XFS] propogate return codes from flush routines

This patch handles error return values in fs_flush_pages and
fs_flushinval_pages. It changes the prototype of fs_flushinval_pages so we
can propogate the errors and handle them at higher layers. I also modified
xfs_itruncate_start so that it could propogate the error further.

SGI-PV: 961990
SGI-Modid: xfs-linux-melb:xfs-kern:28231a

Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Stewart Smith <stewart@flamingspork.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.c b/fs/xfs/linux-2.6/xfs_fs_subr.c
index dc05628..2eb87cd 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_fs_subr.c
+++ b/fs/xfs/linux-2.6/xfs_fs_subr.c
@@ -35,7 +35,7 @@ fs_tosspages(
                truncate_inode_pages(ip->i_mapping, first);
 }
 
-void
+int
 fs_flushinval_pages(
        bhv_desc_t      *bdp,
        xfs_off_t       first,
@@ -44,13 +44,16 @@ fs_flushinval_pages(
 {
        bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
        struct inode    *ip = vn_to_inode(vp);
+       int             ret = 0;
 
        if (VN_CACHED(vp)) {
                if (VN_TRUNC(vp))
                        VUNTRUNCATE(vp);
-               filemap_write_and_wait(ip->i_mapping);
-               truncate_inode_pages(ip->i_mapping, first);
+               ret = filemap_write_and_wait(ip->i_mapping);
+               if (!ret)
+                       truncate_inode_pages(ip->i_mapping, first);
        }
+       return ret;
 }
 
 int
@@ -63,14 +66,18 @@ fs_flush_pages(
 {
        bhv_vnode_t     *vp = BHV_TO_VNODE(bdp);
        struct inode    *ip = vn_to_inode(vp);
+       int             ret = 0;
+       int             ret2;
 
        if (VN_DIRTY(vp)) {
                if (VN_TRUNC(vp))
                        VUNTRUNCATE(vp);
-               filemap_fdatawrite(ip->i_mapping);
+               ret = filemap_fdatawrite(ip->i_mapping);
                if (flags & XFS_B_ASYNC)
-                       return 0;
-               filemap_fdatawait(ip->i_mapping);
+                       return ret;
+               ret2 = filemap_fdatawait(ip->i_mapping);
+               if (!ret)
+                       ret = ret2;
        }
-       return 0;
+       return ret;
 }

diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.h b/fs/xfs/linux-2.6/xfs_fs_subr.h
index aee9ccd..c1b5311 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_fs_subr.h
+++ b/fs/xfs/linux-2.6/xfs_fs_subr.h
@@ -23,7 +23,7 @@ extern int  fs_noerr(void);
 extern int  fs_nosys(void);
 extern void fs_noval(void);
 extern void fs_tosspages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
-extern void fs_flushinval_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
+extern int  fs_flushinval_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
 extern int  fs_flush_pages(bhv_desc_t *, xfs_off_t, xfs_off_t, uint64_t, int);
 
 #endif /* __XFS_FS_SUBR_H__ */

diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index ff8d64e..8e46c97 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -191,7 +191,7 @@ xfs_read(
        struct file             *file = iocb->ki_filp;
        struct inode            *inode = file->f_mapping->host;
        size_t                  size = 0;
-       ssize_t                 ret;
+       ssize_t                 ret = 0;
        xfs_fsize_t             n;
        xfs_inode_t             *ip;
        xfs_mount_t             *mp;
@@ -263,9 +263,13 @@ xfs_read(
 
        if (unlikely(ioflags & IO_ISDIRECT)) {
                if (VN_CACHED(vp))
-                       bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
+                       ret = bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
                                                 -1, FI_REMAPF_LOCKED);
                mutex_unlock(&inode->i_mutex);
+               if (ret) {
+                       xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+                       return ret;
+               }
        }
 
        xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
@@ -814,8 +818,10 @@ retry:
                if (need_flush) {
                        xfs_inval_cached_trace(io, pos, -1,
                                        ctooff(offtoct(pos)), -1);
-                       bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)),
+                       error = bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)),
                                        -1, FI_REMAPF_LOCKED);
+                       if (error)
+                               goto out_unlock_internal;
                }
 
                if (need_i_mutex) {

diff --git a/fs/xfs/linux-2.6/xfs_vnode.h b/fs/xfs/linux-2.6/xfs_vnode.h
index b76118c..d1b2d01 100644 (file)
--- a/fs/xfs/linux-2.6/xfs_vnode.h
+++ b/fs/xfs/linux-2.6/xfs_vnode.h
@@ -194,7 +194,7 @@ typedef     int     (*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
 typedef void   (*vop_link_removed_t)(bhv_desc_t *, bhv_vnode_t *, int);
 typedef void   (*vop_vnode_change_t)(bhv_desc_t *, bhv_vchange_t, __psint_t);
 typedef void   (*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
-typedef void   (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
+typedef int    (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
 typedef int    (*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,
                                uint64_t, int);
 typedef int    (*vop_iflush_t)(bhv_desc_t *, int);

diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c
index fb6f22c..de35d18 100644 (file)
--- a/fs/xfs/xfs_dfrag.c
+++ b/fs/xfs/xfs_dfrag.c
@@ -199,7 +199,9 @@ xfs_swap_extents(
 
        if (VN_CACHED(tvp) != 0) {
                xfs_inval_cached_trace(&tip->i_iocore, 0, -1, 0, -1);
-               bhv_vop_flushinval_pages(tvp, 0, -1, FI_REMAPF_LOCKED);
+               error = bhv_vop_flushinval_pages(tvp, 0, -1, FI_REMAPF_LOCKED);
+               if (error)
+                       goto error0;
        }
 
        /* Verify O_DIRECT for ftmp */

diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 3541d19..7d1ab39 100644 (file)
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -1421,7 +1421,7 @@ xfs_itrunc_trace(
  * must be called again with all the same restrictions as the initial
  * call.
  */
-void
+int
 xfs_itruncate_start(
        xfs_inode_t     *ip,
        uint            flags,
@@ -1431,6 +1431,7 @@ xfs_itruncate_start(
        xfs_off_t       toss_start;
        xfs_mount_t     *mp;
        bhv_vnode_t     *vp;
+       int             error = 0;
 
        ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE) != 0);
        ASSERT((new_size == 0) || (new_size <= ip->i_d.di_size));
@@ -1468,7 +1469,7 @@ xfs_itruncate_start(
                 * file size, so there is no way that the data extended
                 * out there.
                 */
-               return;
+               return 0;
        }
        last_byte = xfs_file_last_byte(ip);
        xfs_itrunc_trace(XFS_ITRUNC_START, ip, flags, new_size, toss_start,
@@ -1477,7 +1478,7 @@ xfs_itruncate_start(
                if (flags & XFS_ITRUNC_DEFINITE) {
                        bhv_vop_toss_pages(vp, toss_start, -1, FI_REMAPF_LOCKED);
                } else {
-                       bhv_vop_flushinval_pages(vp, toss_start, -1, FI_REMAPF_LOCKED);
+                       error = bhv_vop_flushinval_pages(vp, toss_start, -1, FI_REMAPF_LOCKED);
                }
        }
 
@@ -1486,6 +1487,7 @@ xfs_itruncate_start(
                ASSERT(VN_CACHED(vp) == 0);
        }
 #endif
+       return error;
 }
 
 /*

diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index bc82372..699960f 100644 (file)
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -481,7 +481,7 @@ uint                xfs_ip2xflags(struct xfs_inode *);
 uint           xfs_dic2xflags(struct xfs_dinode_core *);
 int            xfs_ifree(struct xfs_trans *, xfs_inode_t *,
                           struct xfs_bmap_free *);
-void           xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
+int            xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 int            xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
                                     xfs_fsize_t, int, int);
 int            xfs_iunlink(struct xfs_trans *, xfs_inode_t *);

diff --git a/fs/xfs/xfs_utils.c b/fs/xfs/xfs_utils.c
index 948b0c8..20ffec3 100644 (file)
--- a/fs/xfs/xfs_utils.c
+++ b/fs/xfs/xfs_utils.c
@@ -420,7 +420,11 @@ xfs_truncate_file(
         * in a transaction.
         */
        xfs_ilock(ip, XFS_IOLOCK_EXCL);
-       xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, (xfs_fsize_t)0);
+       error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, (xfs_fsize_t)0);
+       if (error) {
+               xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+               return error;
+       }
 
        tp = xfs_trans_alloc(mp, XFS_TRANS_TRUNCATE_FILE);
        if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,

diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 22a0927..2e830e7 100644 (file)
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -1147,7 +1147,7 @@ xfs_sync_inodes(
                        if (XFS_FORCED_SHUTDOWN(mp)) {
                                bhv_vop_toss_pages(vp, 0, -1, FI_REMAPF);
                        } else {
-                               bhv_vop_flushinval_pages(vp, 0, -1, FI_REMAPF);
+                               error = bhv_vop_flushinval_pages(vp, 0, -1, FI_REMAPF);
                        }
 
                        xfs_ilock(ip, XFS_ILOCK_SHARED);

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 5ed349e..6e49bd3 100644 (file)
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -1257,8 +1257,12 @@ xfs_inactive_free_eofblocks(
                 * do that within a transaction.
                 */
                xfs_ilock(ip, XFS_IOLOCK_EXCL);
-               xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
+               error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE,
                                    ip->i_d.di_size);
+               if (error) {
+                       xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+                       return error;
+               }
 
                error = xfs_trans_reserve(tp, 0,
                                          XFS_ITRUNCATE_LOG_RES(mp),
@@ -1674,7 +1678,11 @@ xfs_inactive(
                 */
                xfs_ilock(ip, XFS_IOLOCK_EXCL);
 
-               xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
+               error = xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0);
+               if (error) {
+                       xfs_iunlock(ip, XFS_IOLOCK_EXCL);
+                       return VN_INACTIVE_CACHE;
+               }
 
                error = xfs_trans_reserve(tp, 0,
                                          XFS_ITRUNCATE_LOG_RES(mp),
@@ -4338,8 +4346,10 @@ xfs_free_file_space(
        if (VN_CACHED(vp) != 0) {
                xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1,
                                ctooff(offtoct(ioffset)), -1);
-               bhv_vop_flushinval_pages(vp, ctooff(offtoct(ioffset)),
+               error = bhv_vop_flushinval_pages(vp, ctooff(offtoct(ioffset)),
                                -1, FI_REMAPF_LOCKED);
+               if (error)
+                       goto out_unlock_iolock;
        }
 
        /*