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Wong" , Brian Foster , newtongao@tencent.com, jasperwang@tencent.com From: kaixuxia Subject: [PATCH v3] fsstress: add renameat2 support Message-ID: Date: Thu, 17 Oct 2019 09:47:19 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: fstests-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org Support the renameat2 syscall in fsstress. Signed-off-by: kaixuxia --- Changes in v3: - Fix the rename(..., 0) case, avoide to cripple fsstress. ltp/fsstress.c | 158 +++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 125 insertions(+), 33 deletions(-) diff --git a/ltp/fsstress.c b/ltp/fsstress.c index 51976f5..1a20358 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 +1569,17 @@ 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 +1599,7 @@ 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 +1607,7 @@ 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); } } @@ -4215,8 +4259,18 @@ 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; int e; @@ -4234,35 +4288,49 @@ 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; } - - /* 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); + /* Both pathnames must exist for the RENAME_EXCHANGE */ + if (mode == RENAME_EXCHANGE) { + init_pathname(&newf); + if (!get_fname(FT_ANYm, random(), &newf, NULL, &dfep, &v1)) { + if (v1) + printf("%d/%d: rename - no target filename\n", procid, opno); + free_pathname(&newf); + free_pathname(&f); + return; + } + 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; + + /* 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) { + if (e == 0 && mode != RENAME_EXCHANGE) { int xattr_counter = fep->xattr_counter; if (flp - flist == FT_DIR) { @@ -4273,12 +4341,13 @@ rename_f(int opno, long r) 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 +4356,29 @@ 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; -- 1.8.3.1 -- kaixuxia