| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2000-2003 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| */ |
| |
| /* |
| * Test for filesystem features on given mount point or device |
| * -c test for 32bit chown support (via libc) |
| * -t test for working rlimit/ftruncate64 (via libc) |
| * -q test for quota support (kernel compile option) |
| * -u test for user quota enforcement support (mount option) |
| * -p test for project quota enforcement support (mount option) |
| * -g test for group quota enforcement support (mount option) |
| * -U test for user quota accounting support (mount option) |
| * -G test for group quota accounting support (mount option) |
| * -P test for project quota accounting support (mount option) |
| * Return code: 0 is true, anything else is error/not supported |
| * |
| * Test for machine features |
| * -A test whether AIO syscalls are available |
| * -r test whether mount_setattr syscall is supported |
| * -R test whether IO_URING syscalls are available |
| * -o report a number of online cpus |
| * -s report pagesize |
| * -w report bits per long |
| */ |
| |
| #include "global.h" |
| |
| #include <sys/quota.h> |
| #include <sys/resource.h> |
| #include <signal.h> |
| #include <syscall.h> |
| #include <unistd.h> |
| |
| #ifdef HAVE_XFS_XQM_H |
| #include <xfs/xqm.h> |
| #endif |
| |
| #ifdef HAVE_LIBAIO_H |
| #include <libaio.h> |
| #endif |
| |
| #ifdef HAVE_LIBURING_H |
| #include <liburing.h> |
| #endif |
| |
| #include "idmapped-mounts/missing.h" |
| |
| #ifndef USRQUOTA |
| #define USRQUOTA 0 |
| #endif |
| |
| #ifndef GRPQUOTA |
| #define GRPQUOTA 1 |
| #endif |
| |
| #ifndef PRJQUOTA |
| #define PRJQUOTA 2 |
| #endif |
| |
| int verbose = 0; |
| |
| void |
| usage(void) |
| { |
| fprintf(stderr, "Usage: feature [-v] -<q|u|g|p|U|G|P> <filesystem>\n"); |
| fprintf(stderr, " feature [-v] -c <file>\n"); |
| fprintf(stderr, " feature [-v] -t <file>\n"); |
| fprintf(stderr, " feature -A | -r | -R | -o | -s | -w\n"); |
| exit(1); |
| } |
| |
| int check_big_ID(char *filename) |
| { |
| struct stat64 sbuf; |
| |
| memset(&sbuf, 0, sizeof(struct stat64)); |
| if (lstat64(filename, &sbuf) < 0) { |
| fprintf(stderr, "lstat64 failed on "); |
| perror(filename); |
| return(1); |
| } |
| |
| /* 98789 is greater than 2^16 (65536) */ |
| if ((uint32_t)sbuf.st_uid == 98789 || (uint32_t)sbuf.st_gid == 98789) |
| return(0); |
| if (verbose) |
| fprintf(stderr, "lstat64 on %s gave uid=%d, gid=%d\n", |
| filename, (int)sbuf.st_uid, (int)sbuf.st_gid); |
| return(1); |
| } |
| |
| int |
| haschown32(char *filename) |
| { |
| if (check_big_ID(filename) == 0) |
| return(0); |
| |
| if (chown(filename, 98789, 98789) < 0) { |
| fprintf(stderr, "chown failed on "); |
| perror(filename); |
| return(1); |
| } |
| |
| if (check_big_ID(filename) == 0) |
| return(0); |
| return (1); |
| } |
| |
| int |
| hastruncate64(char *filename) |
| { |
| struct rlimit64 rlimit64; |
| off64_t bigoff = 4294967307LL; /* > 2^32 */ |
| struct stat64 bigst; |
| int fd; |
| |
| getrlimit64(RLIMIT_FSIZE, &rlimit64); |
| rlimit64.rlim_cur = RLIM64_INFINITY; |
| setrlimit64(RLIMIT_FSIZE, &rlimit64); |
| |
| signal(SIGXFSZ, SIG_IGN); |
| |
| if ((fd = open(filename, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR)) < 0) { |
| fprintf(stderr, "open failed on "); |
| perror(filename); |
| return(1); |
| } |
| |
| if (ftruncate64(fd, bigoff) < 0) |
| return(1); |
| |
| if (fstat64(fd, &bigst) < 0) { |
| fprintf(stderr, "fstat64 failed on "); |
| perror(filename); |
| return(1); |
| } |
| |
| if (verbose) |
| fprintf(stderr, "fstat64 on %s gave sz=%lld (truncsz=%lld)\n", |
| filename, (long long)bigst.st_size, (long long)bigoff); |
| |
| if (bigst.st_size != bigoff) |
| return(1); |
| return(0); |
| } |
| |
| int |
| hasxfsquota(int type, int q, char *device) |
| { |
| fs_quota_stat_t qstat; |
| int qcmd; |
| |
| memset(&qstat, 0, sizeof(fs_quota_stat_t)); |
| |
| #ifdef QCMD |
| if (q == 0) { |
| if (access("/proc/fs/xfs/xqm", F_OK) < 0) { |
| if (verbose) { |
| fprintf(stderr, "can't access /proc/fs/xfs/xqm\n"); |
| } |
| return 1; |
| } |
| return 0; |
| } |
| qcmd = QCMD(Q_XGETQSTAT, type); |
| #else |
| if (q == 0) { |
| if (quotactl(Q_SYNC, device, 0, (caddr_t)&qstat) == ENOPKG) { |
| if (verbose) { |
| fprintf(stderr, "Q_SYNC not supported\n"); |
| } |
| return 1; |
| } |
| return 0; |
| } |
| qcmd = Q_GETQSTAT; |
| #endif |
| |
| if (quotactl(qcmd, device, 0, (caddr_t)&qstat) < 0) { |
| if (verbose) |
| perror("quotactl"); |
| return (1); |
| } |
| else if (q == XFS_QUOTA_UDQ_ENFD && qstat.qs_flags & XFS_QUOTA_UDQ_ENFD) |
| return (0); |
| else if (q == XFS_QUOTA_GDQ_ENFD && qstat.qs_flags & XFS_QUOTA_GDQ_ENFD) |
| return (0); |
| else if (q == XFS_QUOTA_PDQ_ENFD && qstat.qs_flags & XFS_QUOTA_PDQ_ENFD) |
| return (0); |
| else if (q == XFS_QUOTA_UDQ_ACCT && qstat.qs_flags & XFS_QUOTA_UDQ_ACCT) |
| return (0); |
| else if (q == XFS_QUOTA_GDQ_ACCT && qstat.qs_flags & XFS_QUOTA_GDQ_ACCT) |
| return (0); |
| else if (q == XFS_QUOTA_PDQ_ACCT && qstat.qs_flags & XFS_QUOTA_PDQ_ACCT) |
| return (0); |
| if (verbose) |
| fprintf(stderr, "quota type (%d) not available\n", q); |
| return (1); |
| } |
| |
| static int |
| check_aio_support(void) |
| { |
| #ifdef HAVE_LIBAIO_H |
| struct io_context *ctx = NULL; |
| int err; |
| |
| err = io_setup(1, &ctx); |
| if (err == 0) |
| return 0; |
| |
| if (err == -ENOSYS) /* CONFIG_AIO=n */ |
| return 1; |
| |
| fprintf(stderr, "unexpected error from io_setup(): %s\n", |
| strerror(-err)); |
| return 2; |
| #else |
| /* libaio was unavailable at build time; assume AIO is unsupported */ |
| return 1; |
| #endif |
| } |
| |
| static int |
| check_uring_support(void) |
| { |
| #ifdef HAVE_LIBURING_H |
| struct io_uring ring; |
| int err; |
| |
| err = io_uring_queue_init(1, &ring, 0); |
| if (err == 0) |
| return 0; |
| |
| if (err == -ENOSYS) /* CONFIG_IO_URING=n */ |
| return 1; |
| |
| fprintf(stderr, "unexpected error from io_uring_queue_init(): %s\n", |
| strerror(-err)); |
| return 2; |
| #else |
| /* liburing is unavailable, assume IO_URING is unsupported */ |
| return 1; |
| #endif |
| } |
| |
| static int |
| check_mount_setattr_support(void) |
| { |
| int err; |
| struct mount_attr attr = { |
| .attr_set = MOUNT_ATTR_IDMAP, |
| .userns_fd = -EBADF, |
| }; |
| |
| /* mount_setattr() syscall not supported. */ |
| err = sys_mount_setattr(-EBADF, "", AT_EMPTY_PATH, NULL, 0); |
| if (err && errno == ENOSYS) |
| return 1; |
| |
| /* idmapped mounts not supported */ |
| err = sys_mount_setattr(-EBADF, ".", AT_EMPTY_PATH, &attr, sizeof(attr)); |
| if (err && errno == E2BIG) |
| return 1; |
| |
| return 0; |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| int c; |
| int Aflag = 0; |
| int cflag = 0; |
| int tflag = 0; |
| int gflag = 0; |
| int Gflag = 0; |
| int pflag = 0; |
| int Pflag = 0; |
| int qflag = 0; |
| int rflag = 0; |
| int Rflag = 0; |
| int sflag = 0; |
| int uflag = 0; |
| int Uflag = 0; |
| int wflag = 0; |
| int oflag = 0; |
| char *fs = NULL; |
| |
| while ((c = getopt(argc, argv, "ActgGopPqrRsuUvw")) != EOF) { |
| switch (c) { |
| case 'A': |
| Aflag++; |
| break; |
| case 'c': |
| cflag++; |
| break; |
| case 't': |
| tflag++; |
| break; |
| case 'g': |
| gflag++; |
| break; |
| case 'G': |
| Gflag++; |
| break; |
| case 'o': |
| oflag++; |
| break; |
| case 'p': |
| pflag++; |
| break; |
| case 'P': |
| Pflag++; |
| break; |
| case 'q': |
| qflag++; |
| break; |
| case 'r': |
| rflag++; |
| break; |
| case 'R': |
| Rflag++; |
| break; |
| case 's': |
| sflag++; |
| break; |
| case 'u': |
| uflag++; |
| break; |
| case 'U': |
| Uflag++; |
| break; |
| case 'w': |
| wflag++; |
| break; |
| case 'v': |
| verbose++; |
| break; |
| default: |
| usage(); |
| } |
| } |
| |
| /* filesystem features */ |
| if (cflag|tflag|uflag|gflag|pflag|qflag|Uflag|Gflag|Pflag) { |
| if (optind != argc-1) /* need a device */ |
| usage(); |
| fs = argv[argc-1]; |
| } else if (Aflag || rflag || Rflag || wflag || sflag || oflag) { |
| if (optind != argc) |
| usage(); |
| } else |
| usage(); |
| |
| if (cflag) |
| return(haschown32(fs)); |
| if (tflag) |
| return(hastruncate64(fs)); |
| if (qflag) |
| return(hasxfsquota(0, 0, fs)); |
| if (gflag) |
| return(hasxfsquota(GRPQUOTA, XFS_QUOTA_GDQ_ENFD, fs)); |
| if (pflag) |
| return(hasxfsquota(PRJQUOTA, XFS_QUOTA_PDQ_ENFD, fs)); |
| if (uflag) |
| return(hasxfsquota(USRQUOTA, XFS_QUOTA_UDQ_ENFD, fs)); |
| if (Gflag) |
| return(hasxfsquota(GRPQUOTA, XFS_QUOTA_GDQ_ACCT, fs)); |
| if (Pflag) |
| return(hasxfsquota(PRJQUOTA, XFS_QUOTA_PDQ_ACCT, fs)); |
| if (Uflag) |
| return(hasxfsquota(USRQUOTA, XFS_QUOTA_UDQ_ACCT, fs)); |
| |
| if (Aflag) |
| return(check_aio_support()); |
| |
| if (rflag) |
| return(check_mount_setattr_support()); |
| |
| if (Rflag) |
| return(check_uring_support()); |
| |
| if (sflag) { |
| printf("%d\n", getpagesize()); |
| exit(0); |
| } |
| if (wflag) { |
| #ifdef BITS_PER_LONG |
| printf("%d\n", BITS_PER_LONG); |
| #else |
| #ifdef NBBY |
| /* This can change under IRIX depending on whether we compile |
| * with -n32/-32 or -64 |
| */ |
| printf("%d\n", (int)(NBBY * sizeof(long))); |
| #else |
| bozo! |
| #endif |
| #endif |
| exit(0); |
| } |
| if (oflag) { |
| long ncpus = -1; |
| |
| #if defined(_SC_NPROCESSORS_ONLN) |
| ncpus = sysconf(_SC_NPROCESSORS_ONLN); |
| #elif defined(_SC_NPROC_ONLN) |
| ncpus = sysconf(_SC_NPROC_ONLN); |
| #endif |
| if (ncpus == -1) |
| ncpus = 1; |
| |
| printf("%ld\n", ncpus); |
| |
| exit(0); |
| } |
| |
| fprintf(stderr, "feature: dunno what you're after.\n"); |
| return(1); |
| } |
