* [PATCH v3 04/10] xfs: fix error handling at xfs_inumbers
@ 2014-06-03 9:18 Jeff Liu
2014-06-04 12:41 ` Jeff Liu
0 siblings, 1 reply; 2+ messages in thread
From: Jeff Liu @ 2014-06-03 9:18 UTC (permalink / raw)
To: xfs@oss.sgi.com
From: Jie Liu <jeff.liu@oracle.com>
To fetch the file system number tables, we currently just ignore the
errors and proceed to loop over the next AG or bump agino to the next
chunk in case of btree operations failed, that is not properly because
those errors might hint us potential file system problems.
This patch rework xfs_inumbers() to handle the btree operation errors
as well as the loop conditions.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
---
fs/xfs/xfs_itable.c | 91 ++++++++++++++++++++++-------------------------------
1 file changed, 37 insertions(+), 54 deletions(-)
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index dd68696..693e787 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -550,61 +550,40 @@ xfs_inumbers(
bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
- while (left > 0 && agno < mp->m_sb.sb_agcount) {
+ do {
struct xfs_inobt_rec_incore r;
int stat;
- if (agbp == NULL) {
+ if (!agbp) {
error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
- if (error) {
- /*
- * If we can't read the AGI of this ag,
- * then just skip to the next one.
- */
- ASSERT(cur == NULL);
- agbp = NULL;
- agno++;
- agino = 0;
- continue;
- }
+ if (error)
+ break;
+
cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
XFS_BTNUM_INO);
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
&stat);
- if (error) {
- xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- cur = NULL;
- xfs_buf_relse(agbp);
- agbp = NULL;
- /*
- * Move up the last inode in the current
- * chunk. The lookup_ge will always get
- * us the first inode in the next chunk.
- */
- agino += XFS_INODES_PER_CHUNK - 1;
- continue;
- }
+ if (error)
+ break;
+ if (!stat)
+ goto next_ag;
}
+
error = xfs_inobt_get_rec(cur, &r, &stat);
- if (error || stat == 0) {
- xfs_buf_relse(agbp);
- agbp = NULL;
- xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
- cur = NULL;
- agno++;
- agino = 0;
- continue;
- }
+ if (error)
+ break;
+ if (!stat)
+ goto next_ag;
+
agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
buffer[bufidx].xi_startino =
XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
buffer[bufidx].xi_alloccount =
XFS_INODES_PER_CHUNK - r.ir_freecount;
buffer[bufidx].xi_allocmask = ~r.ir_free;
- bufidx++;
- left--;
- if (bufidx == bcount) {
+ if (++bufidx == bcount) {
long written;
+
error = formatter(ubuffer, buffer, bufidx, &written);
if (error)
break;
@@ -612,22 +591,24 @@ xfs_inumbers(
*count += bufidx;
bufidx = 0;
}
- if (left) {
- error = xfs_btree_increment(cur, 0, &stat);
- if (error) {
- xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- cur = NULL;
- xfs_buf_relse(agbp);
- agbp = NULL;
- /*
- * The agino value has already been bumped.
- * Just try to skip up to it.
- */
- agino += XFS_INODES_PER_CHUNK;
- continue;
- }
- }
- }
+ if (--left)
+ break;
+
+ error = xfs_btree_increment(cur, 0, &stat);
+ if (error)
+ break;
+ if (stat)
+ continue;
+
+next_ag:
+ xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+ cur = NULL;
+ xfs_buf_relse(agbp);
+ agbp = NULL;
+ agno++;
+ agino = 0;
+ } while (++agno < mp->m_sb.sb_agcount);
+
if (!error) {
if (bufidx) {
long written;
@@ -638,11 +619,13 @@ xfs_inumbers(
}
*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
}
+
kmem_free(buffer);
if (cur)
xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
XFS_BTREE_NOERROR));
if (agbp)
xfs_buf_relse(agbp);
+
return error;
}
--
1.8.3.2
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^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH v3 04/10] xfs: fix error handling at xfs_inumbers
2014-06-03 9:18 [PATCH v3 04/10] xfs: fix error handling at xfs_inumbers Jeff Liu
@ 2014-06-04 12:41 ` Jeff Liu
0 siblings, 0 replies; 2+ messages in thread
From: Jeff Liu @ 2014-06-04 12:41 UTC (permalink / raw)
To: xfs@oss.sgi.com
Sorry, there is an issue in this patch, an updated version was shown
as following,
From: Jie Liu <jeff.liu@oracle.com>
To fetch the file system number tables, we currently just ignore the
errors and proceed to loop over the next AG or bump agino to the next
chunk in case of btree operations failed, that is not properly because
those errors might hint us potential file system problems.
This patch rework xfs_inumbers() to handle the btree operation errors
as well as the loop conditions.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
---
fs/xfs/xfs_itable.c | 96 ++++++++++++++++++++++-------------------------------
1 file changed, 39 insertions(+), 57 deletions(-)
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index dd68696..4b41910 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -536,7 +536,7 @@ xfs_inumbers(
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
struct xfs_btree_cur *cur = NULL;
- xfs_buf_t *agbp = NULL;
+ struct xfs_buf *agbp = NULL;
struct xfs_inogrp *buffer;
int bcount;
int left = *count;
@@ -550,61 +550,40 @@ xfs_inumbers(
bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
- while (left > 0 && agno < mp->m_sb.sb_agcount) {
+ do {
struct xfs_inobt_rec_incore r;
int stat;
- if (agbp == NULL) {
+ if (!agbp) {
error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
- if (error) {
- /*
- * If we can't read the AGI of this ag,
- * then just skip to the next one.
- */
- ASSERT(cur == NULL);
- agbp = NULL;
- agno++;
- agino = 0;
- continue;
- }
+ if (error)
+ break;
+
cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
XFS_BTNUM_INO);
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
&stat);
- if (error) {
- xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- cur = NULL;
- xfs_buf_relse(agbp);
- agbp = NULL;
- /*
- * Move up the last inode in the current
- * chunk. The lookup_ge will always get
- * us the first inode in the next chunk.
- */
- agino += XFS_INODES_PER_CHUNK - 1;
- continue;
- }
+ if (error)
+ break;
+ if (!stat)
+ goto next_ag;
}
+
error = xfs_inobt_get_rec(cur, &r, &stat);
- if (error || stat == 0) {
- xfs_buf_relse(agbp);
- agbp = NULL;
- xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
- cur = NULL;
- agno++;
- agino = 0;
- continue;
- }
+ if (error)
+ break;
+ if (!stat)
+ goto next_ag;
+
agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
buffer[bufidx].xi_startino =
XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
buffer[bufidx].xi_alloccount =
XFS_INODES_PER_CHUNK - r.ir_freecount;
buffer[bufidx].xi_allocmask = ~r.ir_free;
- bufidx++;
- left--;
- if (bufidx == bcount) {
- long written;
+ if (++bufidx == bcount) {
+ long written;
+
error = formatter(ubuffer, buffer, bufidx, &written);
if (error)
break;
@@ -612,25 +591,26 @@ xfs_inumbers(
*count += bufidx;
bufidx = 0;
}
- if (left) {
- error = xfs_btree_increment(cur, 0, &stat);
- if (error) {
- xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- cur = NULL;
- xfs_buf_relse(agbp);
- agbp = NULL;
- /*
- * The agino value has already been bumped.
- * Just try to skip up to it.
- */
- agino += XFS_INODES_PER_CHUNK;
- continue;
- }
- }
- }
+ if (!--left)
+ break;
+
+ error = xfs_btree_increment(cur, 0, &stat);
+ if (error)
+ break;
+ if (stat)
+ continue;
+
+next_ag:
+ xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
+ cur = NULL;
+ xfs_buf_relse(agbp);
+ agbp = NULL;
+ agino = 0;
+ } while (++agno < mp->m_sb.sb_agcount);
+
if (!error) {
if (bufidx) {
- long written;
+ long written;
error = formatter(ubuffer, buffer, bufidx, &written);
if (!error)
@@ -638,11 +618,13 @@ xfs_inumbers(
}
*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
}
+
kmem_free(buffer);
if (cur)
xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
XFS_BTREE_NOERROR));
if (agbp)
xfs_buf_relse(agbp);
+
return error;
}
--
1.8.3.2
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2014-06-04 12:41 ` Jeff Liu
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