xfs: encapsulate bbcount validity checking
Define a function that encapsulates checking the validity of a log
block count.
(Updated from previous version--no longer includes error reporting in the
encapsulated validation function.)
Signed-off-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 0e51bdd..b5eab63 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -63,15 +63,29 @@
/* Number of basic blocks in a log sector */
#define xlog_sectbb(log) (1 << (log)->l_sectbb_log)
+/*
+ * Verify the given count of basic blocks is valid number of blocks
+ * to specify for an operation involving the given XFS log buffer.
+ * Returns nonzero if the count is valid, 0 otherwise.
+ */
+
+static inline int
+xlog_buf_bbcount_valid(
+ xlog_t *log,
+ int bbcount)
+{
+ return bbcount > 0 && bbcount <= log->l_logBBsize;
+}
+
STATIC xfs_buf_t *
xlog_get_bp(
xlog_t *log,
int nbblks)
{
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_get_bp(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return NULL;
}
@@ -121,10 +135,10 @@
{
int error;
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_bread(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return EFSCORRUPTED;
}
@@ -183,10 +197,10 @@
{
int error;
- if (nbblks <= 0 || nbblks > log->l_logBBsize) {
- xlog_warn("XFS: Invalid block length (0x%x) given for buffer", nbblks);
- XFS_ERROR_REPORT("xlog_bwrite(1)",
- XFS_ERRLEVEL_HIGH, log->l_mp);
+ if (!xlog_buf_bbcount_valid(log, nbblks)) {
+ xlog_warn("XFS: Invalid block length (0x%x) given for buffer",
+ nbblks);
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
return EFSCORRUPTED;
}