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authorAnthony Iliopoulos <ailiopoulos@suse.com>2019-05-17 17:11:06 +0200
committerAnthony Iliopoulos <ailiopoulos@suse.com>2019-05-17 17:11:06 +0200
commit75b3d11c14040ef088019866ae7082f476c407c1 (patch)
treea6b3d09397164a2f753b6390feadafda2c4a4a20
parent20f0c94a09e70f17c48ff46ce450a1a2a4a1c319 (diff)
xfs: make errortag a per-mountpoint structure (bsc#1123663).
-rw-r--r--fs/xfs/xfs_error.c154
-rw-r--r--fs/xfs/xfs_error.h25
-rw-r--r--fs/xfs/xfs_ioctl.c4
-rw-r--r--fs/xfs/xfs_mount.c10
-rw-r--r--fs/xfs/xfs_mount.h7
5 files changed, 111 insertions, 89 deletions
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index bcf72970ca6b..832deb13c383 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -25,100 +25,106 @@
#ifdef DEBUG
-int xfs_etest[XFS_NUM_INJECT_ERROR];
-int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
-char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
-int xfs_error_test_active;
+static unsigned int xfs_errortag_random_default[] = {
+ XFS_RANDOM_DEFAULT,
+ XFS_RANDOM_IFLUSH_1,
+ XFS_RANDOM_IFLUSH_2,
+ XFS_RANDOM_IFLUSH_3,
+ XFS_RANDOM_IFLUSH_4,
+ XFS_RANDOM_IFLUSH_5,
+ XFS_RANDOM_IFLUSH_6,
+ XFS_RANDOM_DA_READ_BUF,
+ XFS_RANDOM_BTREE_CHECK_LBLOCK,
+ XFS_RANDOM_BTREE_CHECK_SBLOCK,
+ XFS_RANDOM_ALLOC_READ_AGF,
+ XFS_RANDOM_IALLOC_READ_AGI,
+ XFS_RANDOM_ITOBP_INOTOBP,
+ XFS_RANDOM_IUNLINK,
+ XFS_RANDOM_IUNLINK_REMOVE,
+ XFS_RANDOM_DIR_INO_VALIDATE,
+ XFS_RANDOM_BULKSTAT_READ_CHUNK,
+ XFS_RANDOM_IODONE_IOERR,
+ XFS_RANDOM_STRATREAD_IOERR,
+ XFS_RANDOM_STRATCMPL_IOERR,
+ XFS_RANDOM_DIOWRITE_IOERR,
+ XFS_RANDOM_BMAPIFORMAT,
+ XFS_RANDOM_FREE_EXTENT,
+ XFS_RANDOM_RMAP_FINISH_ONE,
+ XFS_RANDOM_REFCOUNT_CONTINUE_UPDATE,
+ XFS_RANDOM_REFCOUNT_FINISH_ONE,
+ XFS_RANDOM_BMAP_FINISH_ONE,
+ XFS_RANDOM_AG_RESV_CRITICAL,
+};
int
-xfs_error_test(int error_tag, int *fsidp, char *expression,
- int line, char *file, unsigned long randfactor)
+xfs_errortag_init(
+ struct xfs_mount *mp)
{
- int i;
- int64_t fsid;
+ mp->m_errortag = kmem_zalloc(sizeof(unsigned int) * XFS_ERRTAG_MAX,
+ KM_SLEEP | KM_MAYFAIL);
+ if (!mp->m_errortag)
+ return -ENOMEM;
+ return 0;
+}
- if (prandom_u32() % randfactor)
- return 0;
+void
+xfs_errortag_del(
+ struct xfs_mount *mp)
+{
+ kmem_free(mp->m_errortag);
+}
- memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
+bool
+xfs_errortag_test(
+ struct xfs_mount *mp,
+ const char *expression,
+ const char *file,
+ int line,
+ unsigned int error_tag)
+{
+ unsigned int randfactor;
- for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
- if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
- xfs_warn(NULL,
- "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
- expression, file, line, xfs_etest_fsname[i]);
- return 1;
- }
- }
+ ASSERT(error_tag < XFS_ERRTAG_MAX);
+ randfactor = mp->m_errortag[error_tag];
+ if (!randfactor || prandom_u32() % randfactor)
+ return false;
- return 0;
+ xfs_warn_ratelimited(mp,
+"Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
+ expression, file, line, mp->m_fsname);
+ return true;
}
int
-xfs_errortag_add(unsigned int error_tag, xfs_mount_t *mp)
+xfs_errortag_set(
+ struct xfs_mount *mp,
+ unsigned int error_tag,
+ unsigned int tag_value)
{
- int i;
- int len;
- int64_t fsid;
-
if (error_tag >= XFS_ERRTAG_MAX)
return -EINVAL;
- memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
-
- for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
- if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
- xfs_warn(mp, "error tag #%d on", error_tag);
- return 0;
- }
- }
-
- for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
- if (xfs_etest[i] == 0) {
- xfs_warn(mp, "Turned on XFS error tag #%d",
- error_tag);
- xfs_etest[i] = error_tag;
- xfs_etest_fsid[i] = fsid;
- len = strlen(mp->m_fsname);
- xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
- strcpy(xfs_etest_fsname[i], mp->m_fsname);
- xfs_error_test_active++;
- return 0;
- }
- }
-
- xfs_warn(mp, "error tag overflow, too many turned on");
-
- return 1;
+ mp->m_errortag[error_tag] = tag_value;
+ return 0;
}
int
-xfs_errortag_clearall(xfs_mount_t *mp, int loud)
+xfs_errortag_add(
+ struct xfs_mount *mp,
+ unsigned int error_tag)
{
- int64_t fsid;
- int cleared = 0;
- int i;
-
- memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
-
-
- for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
- if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
- xfs_etest[i] != 0) {
- cleared = 1;
- xfs_warn(mp, "Clearing XFS error tag #%d",
- xfs_etest[i]);
- xfs_etest[i] = 0;
- xfs_etest_fsid[i] = 0LL;
- kmem_free(xfs_etest_fsname[i]);
- xfs_etest_fsname[i] = NULL;
- xfs_error_test_active--;
- }
- }
+ if (error_tag >= XFS_ERRTAG_MAX)
+ return -EINVAL;
- if (loud || cleared)
- xfs_warn(mp, "Cleared all XFS error tags for filesystem");
+ return xfs_errortag_set(mp, error_tag,
+ xfs_errortag_random_default[error_tag]);
+}
+int
+xfs_errortag_clearall(
+ struct xfs_mount *mp)
+{
+ memset(mp->m_errortag, 0, sizeof(unsigned int) * XFS_ERRTAG_MAX);
return 0;
}
#endif /* DEBUG */
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 05f8666733a0..b4316d39e1ca 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -131,21 +131,24 @@ extern void xfs_verifier_error(struct xfs_buf *bp);
#define XFS_RANDOM_AG_RESV_CRITICAL 4
#ifdef DEBUG
-extern int xfs_error_test_active;
-extern int xfs_error_test(int, int *, char *, int, char *, unsigned long);
-
-#define XFS_NUM_INJECT_ERROR 10
+extern int xfs_errortag_init(struct xfs_mount *mp);
+extern void xfs_errortag_del(struct xfs_mount *mp);
+extern bool xfs_errortag_test(struct xfs_mount *mp, const char *expression,
+ const char *file, int line, unsigned int error_tag);
#define XFS_TEST_ERROR(expr, mp, tag, rf) \
- ((expr) || (xfs_error_test_active && \
- xfs_error_test((tag), (mp)->m_fixedfsid, "expr", __LINE__, __FILE__, \
- (rf))))
+ ((expr) || xfs_errortag_test((mp), #expr, __FILE__, __LINE__, (tag)))
-extern int xfs_errortag_add(unsigned int error_tag, struct xfs_mount *mp);
-extern int xfs_errortag_clearall(struct xfs_mount *mp, int loud);
+extern int xfs_errortag_set(struct xfs_mount *mp, unsigned int error_tag,
+ unsigned int tag_value);
+extern int xfs_errortag_add(struct xfs_mount *mp, unsigned int error_tag);
+extern int xfs_errortag_clearall(struct xfs_mount *mp);
#else
+#define xfs_errortag_init(mp) (0)
+#define xfs_errortag_del(mp)
#define XFS_TEST_ERROR(expr, mp, tag, rf) (expr)
-#define xfs_errortag_add(tag, mp) (ENOSYS)
-#define xfs_errortag_clearall(mp, loud) (ENOSYS)
+#define xfs_errortag_set(mp, tag, val) (ENOSYS)
+#define xfs_errortag_add(mp, tag) (ENOSYS)
+#define xfs_errortag_clearall(mp) (ENOSYS)
#endif /* DEBUG */
/*
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index c97cd202a50e..a45bfec23653 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -2045,14 +2045,14 @@ xfs_file_ioctl(
if (copy_from_user(&in, arg, sizeof(in)))
return -EFAULT;
- return xfs_errortag_add(in.errtag, mp);
+ return xfs_errortag_add(mp, in.errtag);
}
case XFS_IOC_ERROR_CLEARALL:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- return xfs_errortag_clearall(mp, 1);
+ return xfs_errortag_clearall(mp);
case XFS_IOC_FREE_EOFBLOCKS: {
struct xfs_fs_eofblocks eofb;
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index 34550b60e98e..d405343d9f24 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -769,10 +769,13 @@ xfs_mountfs(
if (error)
goto out_del_stats;
+ error = xfs_errortag_init(mp);
+ if (error)
+ goto out_remove_error_sysfs;
error = xfs_uuid_mount(mp);
if (error)
- goto out_remove_error_sysfs;
+ goto out_remove_errortag;
/*
* Set the minimum read and write sizes
@@ -1062,6 +1065,8 @@ xfs_mountfs(
xfs_da_unmount(mp);
out_remove_uuid:
xfs_uuid_unmount(mp);
+ out_remove_errortag:
+ xfs_errortag_del(mp);
out_remove_error_sysfs:
xfs_error_sysfs_del(mp);
out_del_stats:
@@ -1165,10 +1170,11 @@ xfs_unmountfs(
xfs_uuid_unmount(mp);
#if defined(DEBUG)
- xfs_errortag_clearall(mp, 0);
+ xfs_errortag_clearall(mp);
#endif
xfs_free_perag(mp);
+ xfs_errortag_del(mp);
xfs_error_sysfs_del(mp);
xfs_sysfs_del(&mp->m_stats.xs_kobj);
xfs_sysfs_del(&mp->m_kobj);
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index b7692467f4ab..d5107d044f8e 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -199,6 +199,13 @@ typedef struct xfs_mount {
bool m_fail_unmount;
#ifdef DEBUG
/*
+ * Frequency with which errors are injected. Replaces xfs_etest; the
+ * value stored in here is the inverse of the frequency with which the
+ * error triggers. 1 = always, 2 = half the time, etc.
+ */
+ unsigned int *m_errortag;
+
+ /*
* DEBUG mode instrumentation to test and/or trigger delayed allocation
* block killing in the event of failed writes. When enabled, all
* buffered writes are silenty dropped and handled as if they failed.