From: kaixuxia <xiakaixu1987@gmail.com>
To: fstests@vger.kernel.org, Eryu Guan <guaneryu@gmail.com>
Cc: linux-xfs@vger.kernel.org,
"Darrick J. Wong" <darrick.wong@oracle.com>,
Brian Foster <bfoster@redhat.com>,
newtongao@tencent.com, jasperwang@tencent.com
Subject: Re: [PATCH v4] fsstress: add renameat2 support
Date: Mon, 21 Oct 2019 14:41:34 +0800 [thread overview]
Message-ID: <dfe39be6-bfa7-45fa-8e1b-f12304ac9aca@gmail.com> (raw)
In-Reply-To: <5df7cc7b-31b4-69e2-f623-83a2c90bfca7@gmail.com>
Eryu, Brian has reviewed and tested the patch that testing the deadlock between
the AGI and AGF with RENAME_WHITEOUT[1]. That [1] patch depends on this patch
and they should be a thread patchset. But for some reason, they didn't be sent
together, sorry for that... What are your comments about this patch?
[1]: https://www.spinics.net/lists/linux-xfs/msg32923.html
On 2019/10/18 17:57, kaixuxia wrote:
> Support the renameat2 syscall in fsstress.
>
> Signed-off-by: kaixuxia <kaixuxia@tencent.com>
> ---
> Changes in v4:
> -Fix long line((> 80 characters) problem.
> -Fix the RENAME_WHITEOUT RENAME_EXCHANGE file flist problem.
>
> ltp/fsstress.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++----------
> 1 file changed, 143 insertions(+), 31 deletions(-)
>
> diff --git a/ltp/fsstress.c b/ltp/fsstress.c
> index 51976f5..f268a5a 100644
> --- a/ltp/fsstress.c
> +++ b/ltp/fsstress.c
> @@ -44,6 +44,38 @@ io_context_t io_ctx;
> #define IOV_MAX 1024
> #endif
>
> +#ifndef HAVE_RENAMEAT2
> +#if !defined(SYS_renameat2) && defined(__x86_64__)
> +#define SYS_renameat2 316
> +#endif
> +
> +#if !defined(SYS_renameat2) && defined(__i386__)
> +#define SYS_renameat2 353
> +#endif
> +
> +static int renameat2(int dfd1, const char *path1,
> + int dfd2, const char *path2,
> + unsigned int flags)
> +{
> +#ifdef SYS_renameat2
> + return syscall(SYS_renameat2, dfd1, path1, dfd2, path2, flags);
> +#else
> + errno = ENOSYS;
> + return -1;
> +#endif
> +}
> +#endif
> +
> +#ifndef RENAME_NOREPLACE
> +#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
> +#endif
> +#ifndef RENAME_EXCHANGE
> +#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
> +#endif
> +#ifndef RENAME_WHITEOUT
> +#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
> +#endif
> +
> #define FILELEN_MAX (32*4096)
>
> typedef enum {
> @@ -85,6 +117,9 @@ typedef enum {
> OP_READV,
> OP_REMOVEFATTR,
> OP_RENAME,
> + OP_RNOREPLACE,
> + OP_REXCHANGE,
> + OP_RWHITEOUT,
> OP_RESVSP,
> OP_RMDIR,
> OP_SETATTR,
> @@ -203,6 +238,9 @@ void readlink_f(int, long);
> void readv_f(int, long);
> void removefattr_f(int, long);
> void rename_f(int, long);
> +void rnoreplace_f(int, long);
> +void rexchange_f(int, long);
> +void rwhiteout_f(int, long);
> void resvsp_f(int, long);
> void rmdir_f(int, long);
> void setattr_f(int, long);
> @@ -262,6 +300,9 @@ opdesc_t ops[] = {
> /* remove (delete) extended attribute */
> { OP_REMOVEFATTR, "removefattr", removefattr_f, 1, 1 },
> { OP_RENAME, "rename", rename_f, 2, 1 },
> + { OP_RNOREPLACE, "rnoreplace", rnoreplace_f, 2, 1 },
> + { OP_REXCHANGE, "rexchange", rexchange_f, 2, 1 },
> + { OP_RWHITEOUT, "rwhiteout", rwhiteout_f, 2, 1 },
> { OP_RESVSP, "resvsp", resvsp_f, 1, 1 },
> { OP_RMDIR, "rmdir", rmdir_f, 1, 1 },
> /* set attribute flag (FS_IOC_SETFLAGS ioctl) */
> @@ -354,7 +395,7 @@ int open_path(pathname_t *, int);
> DIR *opendir_path(pathname_t *);
> void process_freq(char *);
> int readlink_path(pathname_t *, char *, size_t);
> -int rename_path(pathname_t *, pathname_t *);
> +int rename_path(pathname_t *, pathname_t *, int);
> int rmdir_path(pathname_t *);
> void separate_pathname(pathname_t *, char *, pathname_t *);
> void show_ops(int, char *);
> @@ -1519,7 +1560,7 @@ readlink_path(pathname_t *name, char *lbuf, size_t lbufsiz)
> }
>
> int
> -rename_path(pathname_t *name1, pathname_t *name2)
> +rename_path(pathname_t *name1, pathname_t *name2, int mode)
> {
> char buf1[NAME_MAX + 1];
> char buf2[NAME_MAX + 1];
> @@ -1528,14 +1569,18 @@ rename_path(pathname_t *name1, pathname_t *name2)
> pathname_t newname2;
> int rval;
>
> - rval = rename(name1->path, name2->path);
> + if (mode == 0)
> + rval = rename(name1->path, name2->path);
> + else
> + rval = renameat2(AT_FDCWD, name1->path,
> + AT_FDCWD, name2->path, mode);
> if (rval >= 0 || errno != ENAMETOOLONG)
> return rval;
> separate_pathname(name1, buf1, &newname1);
> separate_pathname(name2, buf2, &newname2);
> if (strcmp(buf1, buf2) == 0) {
> if (chdir(buf1) == 0) {
> - rval = rename_path(&newname1, &newname2);
> + rval = rename_path(&newname1, &newname2, mode);
> assert(chdir("..") == 0);
> }
> } else {
> @@ -1555,7 +1600,7 @@ rename_path(pathname_t *name1, pathname_t *name2)
> append_pathname(&newname2, "../");
> append_pathname(&newname2, name2->path);
> if (chdir(buf1) == 0) {
> - rval = rename_path(&newname1, &newname2);
> + rval = rename_path(&newname1, &newname2, mode);
> assert(chdir("..") == 0);
> }
> } else {
> @@ -1563,7 +1608,7 @@ rename_path(pathname_t *name1, pathname_t *name2)
> append_pathname(&newname1, "../");
> append_pathname(&newname1, name1->path);
> if (chdir(buf2) == 0) {
> - rval = rename_path(&newname1, &newname2);
> + rval = rename_path(&newname1, &newname2, mode);
> assert(chdir("..") == 0);
> }
> }
> @@ -4215,10 +4260,21 @@ out:
> free_pathname(&f);
> }
>
> +struct print_flags renameat2_flags [] = {
> + { RENAME_NOREPLACE, "NOREPLACE"},
> + { RENAME_EXCHANGE, "EXCHANGE"},
> + { RENAME_WHITEOUT, "WHITEOUT"},
> + { -1, NULL}
> +};
> +
> +#define translate_renameat2_flags(mode) \
> + ({translate_flags(mode, "|", renameat2_flags);})
> +
> void
> -rename_f(int opno, long r)
> +do_renameat2(int opno, long r, int mode)
> {
> fent_t *dfep;
> + flist_t *dflp;
> int e;
> pathname_t f;
> fent_t *fep;
> @@ -4234,33 +4290,56 @@ rename_f(int opno, long r)
> init_pathname(&f);
> if (!get_fname(FT_ANYm, r, &f, &flp, &fep, &v1)) {
> if (v1)
> - printf("%d/%d: rename - no filename\n", procid, opno);
> + printf("%d/%d: rename - no source filename\n",
> + procid, opno);
> free_pathname(&f);
> return;
> }
> + /* Both pathnames must exist for the RENAME_EXCHANGE */
> + if (mode == RENAME_EXCHANGE) {
> + init_pathname(&newf);
> + if (!get_fname(FT_ANYm, random(), &newf, &dflp, &dfep, &v)) {
> + if (v)
> + printf("%d/%d: rename - no target filename\n",
> + procid, opno);
> + free_pathname(&newf);
> + free_pathname(&f);
> + return;
> + }
> + v |= v1;
> + id = dfep->id;
> + parid = dfep->parent;
> + } else {
> + /*
> + * get an existing directory for the destination parent
> + * directory name.
> + */
> + if (!get_fname(FT_DIRm, random(), NULL, NULL, &dfep, &v))
> + parid = -1;
> + else
> + parid = dfep->id;
> + v |= v1;
>
> - /* get an existing directory for the destination parent directory name */
> - if (!get_fname(FT_DIRm, random(), NULL, NULL, &dfep, &v))
> - parid = -1;
> - else
> - parid = dfep->id;
> - v |= v1;
> -
> - /* generate a new path using an existing parent directory in name */
> - init_pathname(&newf);
> - e = generate_fname(dfep, flp - flist, &newf, &id, &v1);
> - v |= v1;
> - if (!e) {
> - if (v) {
> - (void)fent_to_name(&f, &flist[FT_DIR], dfep);
> - printf("%d/%d: rename - no filename from %s\n",
> - procid, opno, f.path);
> + /*
> + * generate a new path using an existing parent directory
> + * in name.
> + */
> + init_pathname(&newf);
> + e = generate_fname(dfep, flp - flist, &newf, &id, &v1);
> + v |= v1;
> + if (!e) {
> + if (v) {
> + (void)fent_to_name(&f, &flist[FT_DIR], dfep);
> + printf("%d/%d: rename - no filename from %s\n",
> + procid, opno, f.path);
> + }
> + free_pathname(&newf);
> + free_pathname(&f);
> + return;
> }
> - free_pathname(&newf);
> - free_pathname(&f);
> - return;
> }
> - e = rename_path(&f, &newf) < 0 ? errno : 0;
> +
> + e = rename_path(&f, &newf, mode) < 0 ? errno : 0;
> check_cwd();
> if (e == 0) {
> int xattr_counter = fep->xattr_counter;
> @@ -4269,16 +4348,26 @@ rename_f(int opno, long r)
> oldid = fep->id;
> fix_parent(oldid, id);
> }
> +
> + if (mode == RENAME_WHITEOUT)
> + add_to_flist(FT_DEV, fep->id, fep->parent, 0);
> + else if (mode == RENAME_EXCHANGE) {
> + del_from_flist(dflp - flist, dfep - dflp->fents);
> + add_to_flist(dflp - flist, fep->id, fep->parent,
> + dfep->xattr_counter);
> + }
> +
> del_from_flist(flp - flist, fep - flp->fents);
> add_to_flist(flp - flist, id, parid, xattr_counter);
> }
> if (v) {
> - printf("%d/%d: rename %s to %s %d\n", procid, opno, f.path,
> + printf("%d/%d: rename(%s) %s to %s %d\n", procid,
> + opno, translate_renameat2_flags(mode), f.path,
> newf.path, e);
> if (e == 0) {
> - printf("%d/%d: rename del entry: id=%d,parent=%d\n",
> + printf("%d/%d: rename source entry: id=%d,parent=%d\n",
> procid, opno, fep->id, fep->parent);
> - printf("%d/%d: rename add entry: id=%d,parent=%d\n",
> + printf("%d/%d: rename target entry: id=%d,parent=%d\n",
> procid, opno, id, parid);
> }
> }
> @@ -4287,6 +4376,29 @@ rename_f(int opno, long r)
> }
>
> void
> +rename_f(int opno, long r)
> +{
> + do_renameat2(opno, r, 0);
> +}
> +void
> +rnoreplace_f(int opno, long r)
> +{
> + do_renameat2(opno, r, RENAME_NOREPLACE);
> +}
> +
> +void
> +rexchange_f(int opno, long r)
> +{
> + do_renameat2(opno, r, RENAME_EXCHANGE);
> +}
> +
> +void
> +rwhiteout_f(int opno, long r)
> +{
> + do_renameat2(opno, r, RENAME_WHITEOUT);
> +}
> +
> +void
> resvsp_f(int opno, long r)
> {
> int e;
>
--
kaixuxia
next prev parent reply other threads:[~2019-10-21 6:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-18 9:57 [PATCH v4] fsstress: add renameat2 support kaixuxia
2019-10-21 6:41 ` kaixuxia [this message]
2019-10-21 13:54 ` Brian Foster
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