The most common usecase for rename(2) syscall is an atomic replacement
of existing file with newer version. But rename_f() rename some existing
filename to newly generated (non existing) filename. As result the most
important usecase is not covered.
Since rename_f() is already exist in fsstress and it has known behavior,
some tests already depends on that behaviour, let's add another operation
(replace_f) which invoke rename(2) for two existing entries.
OUT_OF_COMMIT_DISCUSSION:
Off course replace_f() break naming convention where fun_name == syscall_f(),
but this is the only way I see to introduce new feature and not break
other tests. May be it is reasonable to call it rename2_f() ?
Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
---
ltp/fsstress.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 47 insertions(+), 0 deletions(-)
diff --git a/ltp/fsstress.c b/ltp/fsstress.c
index b4cfb25..85ff72a 100644
--- a/ltp/fsstress.c
+++ b/ltp/fsstress.c
@@ -80,6 +80,7 @@ typedef enum {
OP_READ,
OP_READLINK,
OP_RENAME,
+ OP_REPLACE,
OP_RESVSP,
OP_RMDIR,
OP_SETATTR,
@@ -165,6 +166,7 @@ void punch_f(int, long);
void read_f(int, long);
void readlink_f(int, long);
void rename_f(int, long);
+void replace_f(int, long);
void resvsp_f(int, long);
void rmdir_f(int, long);
void setattr_f(int, long);
@@ -202,6 +204,7 @@ opdesc_t ops[] = {
{ OP_READ, "read", read_f, 1, 0 },
{ OP_READLINK, "readlink", readlink_f, 1, 0 },
{ OP_RENAME, "rename", rename_f, 2, 1 },
+ { OP_REPLACE, "replace", replace_f, 2, 1 },
{ OP_RESVSP, "resvsp", resvsp_f, 1, 1 },
{ OP_RMDIR, "rmdir", rmdir_f, 1, 1 },
{ OP_SETATTR, "setattr", setattr_f, 0, 1 },
@@ -2680,6 +2683,50 @@ rename_f(int opno, long r)
}
void
+replace_f(int opno, long r)
+{
+ int e;
+ pathname_t src_f, dst_f;
+ fent_t *src_fep, *dst_fep;
+ flist_t *src_flp, *dst_flp;
+ int v;
+ int v1;
+
+ /* get an existing path for the source of the rename */
+ init_pathname(&src_f);
+ if (!get_fname(FT_ANYm, r, &src_f, &src_flp, &src_fep, &v)) {
+ if (v)
+ printf("%d/%d: replace - no filename\n", procid, opno);
+ free_pathname(&src_f);
+ return;
+ }
+ /* get an existing path for the destination of the rename */
+ init_pathname(&dst_f);
+ if (!get_fname(1 << (src_flp - flist), rand(), &dst_f, &dst_flp, &dst_fep, &v1)) {
+ if (v1)
+ printf("%d/%d: replace - no filename\n", procid, opno);
+ free_pathname(&dst_f);
+ return;
+ }
+
+ v |= v1;
+ e = rename_path(&src_f, &dst_f) < 0 ? errno : 0;
+ check_cwd();
+ if (e == 0 && src_fep->id != dst_fep->id ) {
+ del_from_flist(src_flp - flist, src_fep - src_flp->fents);
+ }
+ if (v) {
+ printf("%d/%d: replace %s with %s %d\n", procid, opno, dst_f.path,
+ src_f.path, e);
+ if (e == 0 && src_fep->id != dst_fep->id)
+ printf("%d/%d: replace del entry: id=%d,parent=%d\n",
+ procid, opno, src_fep->id, src_fep->parent);
+ }
+ free_pathname(&src_f);
+ free_pathname(&dst_f);
+}
+
+void
resvsp_f(int opno, long r)
{
int e;
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
