| Message ID | 20240909-listmount_statmount-v4-8-39558204ddf0@suse.com |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | statmount/listmount testing suites | expand |
Hi! > This test verifies that statmount() is correctly reading mount > information (mount id, parent mount id, mount attributes etc.) > using STATMOUNT_MNT_BASIC. > > Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com> > --- > runtest/syscalls | 1 + > testcases/kernel/syscalls/statmount/.gitignore | 1 + > testcases/kernel/syscalls/statmount/statmount.h | 24 ++++ > testcases/kernel/syscalls/statmount/statmount03.c | 137 ++++++++++++++++++++++ > 4 files changed, 163 insertions(+) > > diff --git a/runtest/syscalls b/runtest/syscalls > index e028baf19..ec11a3a21 100644 > --- a/runtest/syscalls > +++ b/runtest/syscalls > @@ -1570,6 +1570,7 @@ stat04_64 stat04_64 > > statmount01 statmount01 > statmount02 statmount02 > +statmount03 statmount03 > > statfs01 statfs01 > statfs01_64 statfs01_64 > diff --git a/testcases/kernel/syscalls/statmount/.gitignore b/testcases/kernel/syscalls/statmount/.gitignore > index a30b9565f..2a02bf721 100644 > --- a/testcases/kernel/syscalls/statmount/.gitignore > +++ b/testcases/kernel/syscalls/statmount/.gitignore > @@ -1,2 +1,3 @@ > statmount01 > statmount02 > +statmount03 > diff --git a/testcases/kernel/syscalls/statmount/statmount.h b/testcases/kernel/syscalls/statmount/statmount.h > index e807c8288..5cd54242c 100644 > --- a/testcases/kernel/syscalls/statmount/statmount.h > +++ b/testcases/kernel/syscalls/statmount/statmount.h > @@ -10,6 +10,7 @@ > #include "tst_test.h" > #include "lapi/mount.h" > #include "lapi/syscalls.h" > +#include "tst_safe_stdio.h" > > static inline int statmount(uint64_t mnt_id, uint64_t mask, struct statmount *buf, > size_t bufsize, unsigned int flags) > @@ -23,4 +24,27 @@ static inline int statmount(uint64_t mnt_id, uint64_t mask, struct statmount *bu > return tst_syscall(__NR_statmount, &req, buf, bufsize, flags); > } > > +static inline int read_peer_group(const char *path) > +{ > + FILE *file; > + char line[PATH_MAX]; > + char mroot[PATH_MAX]; > + int group = -1; > + > + file = SAFE_FOPEN("/proc/self/mountinfo", "r"); > + > + while (fgets(line, sizeof(line), file)) { > + if (sscanf(line, "%*d %*d %*d:%*d %s %*s %*s shared:%d", mroot, &group) != 2) > + continue; > + > + if (strcmp(mroot, path) == 0) > + break; > + } > + > + if (group == -1) > + tst_brk(TBROK, "Can't reed peer group ID for %s", path); > + > + return group; > +} > + > #endif > diff --git a/testcases/kernel/syscalls/statmount/statmount03.c b/testcases/kernel/syscalls/statmount/statmount03.c > new file mode 100644 > index 000000000..634c4b447 > --- /dev/null > +++ b/testcases/kernel/syscalls/statmount/statmount03.c > @@ -0,0 +1,137 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com> > + */ > + > +/*\ > + * [Description] > + * > + * This test verifies that statmount() is correctly reading mount information > + * (mount id, parent mount id, mount attributes etc.) using STATMOUNT_MNT_BASIC. > + * > + * [Algorithm] > + * > + * - create a mount point > + * - create a new parent folder inside the mount point and obtain its mount info > + * - create the new "/" mount folder and obtain its mount info > + * - run statmount() on the mount point using STATMOUNT_MNT_BASIC > + * - read results and check if mount info are correct > + */ > + > +#define _GNU_SOURCE > + > +#include "statmount.h" > +#include "lapi/stat.h" > +#include "lapi/sched.h" > + > +#define DIR_A "LTP_DIR_A" > +#define DIR_B "LTP_DIR_B" > + > +static uint64_t mnt_id; > +static uint64_t mnt_id_old; > +static uint64_t parent_id; > +static uint64_t parent_id_old; > +static uint64_t mnt_peer_group; > +static uint64_t mnt_master; > +static struct statmount *st_mount; > + > +static void read_mnt_id( > + const char *path, > + uint64_t *mnt_id, > + uint64_t *mnt_id_unique) > +{ > + struct ltp_statx sx; > + > + if (mnt_id) { > + SAFE_STATX(AT_FDCWD, path, 0, STATX_MNT_ID, &sx); > + *mnt_id = sx.data.stx_mnt_id; > + } > + > + if (mnt_id_unique) { > + SAFE_STATX(AT_FDCWD, path, 0, STATX_MNT_ID_UNIQUE, &sx); > + *mnt_id_unique = sx.data.stx_mnt_id; > + } Technically the stx_mnt_id is only valid if the sx.data.stx_mask has the STATX_MNT_ID or STATX_MNT_ID_UNIQUE set when statx() returns. We have min_kver set to 6.8 so this should always work, but it wouldn't hurt to double check. > +} > + > +static struct tcase { > + uint64_t prop_type; > + char *msg; > +} tcases[] = { > + { MS_PRIVATE, TST_TO_STR_(MS_PRIVATE) }, > + { MS_SHARED, TST_TO_STR_(MS_SHARED) }, > + { MS_SLAVE, TST_TO_STR_(MS_SLAVE) }, > + { MS_UNBINDABLE, TST_TO_STR_(MS_UNBINDABLE) }, > +}; > + > +static void run(unsigned int i) > +{ > + struct tcase *tc = &tcases[i]; > + > + tst_res(TINFO, "Testing statmount() on %s", tc->msg); > + > + SAFE_MOUNT(DIR_B, DIR_A, "none", MS_BIND, NULL); > + SAFE_MOUNT("none", DIR_A, "none", tc->prop_type, NULL); > + read_mnt_id(DIR_A, &mnt_id_old, &mnt_id); > + > + memset(st_mount, 0, sizeof(struct statmount)); > + > + TST_EXP_PASS(statmount(mnt_id, STATMOUNT_MNT_BASIC, st_mount, > + sizeof(struct statmount), 0)); > + > + SAFE_UMOUNT(DIR_A); > + > + if (TST_RET == -1) > + return; Here as well if (!TST_PASS) > + /* s->sm.mnt_peer_group = IS_MNT_SHARED(m) ? m->mnt_group_id : 0; > + * s->sm.mnt_master = IS_MNT_SLAVE(m) ? m->mnt_master->mnt_group_id : 0; > + */ This comment looks like a leftover. > + mnt_peer_group = tc->prop_type == MS_SHARED ? read_peer_group(DIR_A) : 0; > + mnt_master = tc->prop_type == MS_SLAVE ? read_peer_group(DIR_A) : 0; > + > + TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_MNT_BASIC); > + TST_EXP_EQ_LI(st_mount->size, sizeof(struct statmount)); > + TST_EXP_EQ_LI(st_mount->mnt_id, mnt_id); > + TST_EXP_EQ_LI(st_mount->mnt_id_old, mnt_id_old); > + TST_EXP_EQ_LI(st_mount->mnt_parent_id, parent_id); > + TST_EXP_EQ_LI(st_mount->mnt_parent_id_old, parent_id_old); > + TST_EXP_EQ_LU(st_mount->mnt_propagation & tc->prop_type, tc->prop_type); > + TST_EXP_EQ_LI(st_mount->mnt_master, mnt_master); > + TST_EXP_EQ_LI(st_mount->mnt_peer_group, mnt_peer_group); > +} Otherwise it looks good: Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
diff --git a/runtest/syscalls b/runtest/syscalls index e028baf19..ec11a3a21 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -1570,6 +1570,7 @@ stat04_64 stat04_64 statmount01 statmount01 statmount02 statmount02 +statmount03 statmount03 statfs01 statfs01 statfs01_64 statfs01_64 diff --git a/testcases/kernel/syscalls/statmount/.gitignore b/testcases/kernel/syscalls/statmount/.gitignore index a30b9565f..2a02bf721 100644 --- a/testcases/kernel/syscalls/statmount/.gitignore +++ b/testcases/kernel/syscalls/statmount/.gitignore @@ -1,2 +1,3 @@ statmount01 statmount02 +statmount03 diff --git a/testcases/kernel/syscalls/statmount/statmount.h b/testcases/kernel/syscalls/statmount/statmount.h index e807c8288..5cd54242c 100644 --- a/testcases/kernel/syscalls/statmount/statmount.h +++ b/testcases/kernel/syscalls/statmount/statmount.h @@ -10,6 +10,7 @@ #include "tst_test.h" #include "lapi/mount.h" #include "lapi/syscalls.h" +#include "tst_safe_stdio.h" static inline int statmount(uint64_t mnt_id, uint64_t mask, struct statmount *buf, size_t bufsize, unsigned int flags) @@ -23,4 +24,27 @@ static inline int statmount(uint64_t mnt_id, uint64_t mask, struct statmount *bu return tst_syscall(__NR_statmount, &req, buf, bufsize, flags); } +static inline int read_peer_group(const char *path) +{ + FILE *file; + char line[PATH_MAX]; + char mroot[PATH_MAX]; + int group = -1; + + file = SAFE_FOPEN("/proc/self/mountinfo", "r"); + + while (fgets(line, sizeof(line), file)) { + if (sscanf(line, "%*d %*d %*d:%*d %s %*s %*s shared:%d", mroot, &group) != 2) + continue; + + if (strcmp(mroot, path) == 0) + break; + } + + if (group == -1) + tst_brk(TBROK, "Can't reed peer group ID for %s", path); + + return group; +} + #endif diff --git a/testcases/kernel/syscalls/statmount/statmount03.c b/testcases/kernel/syscalls/statmount/statmount03.c new file mode 100644 index 000000000..634c4b447 --- /dev/null +++ b/testcases/kernel/syscalls/statmount/statmount03.c @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com> + */ + +/*\ + * [Description] + * + * This test verifies that statmount() is correctly reading mount information + * (mount id, parent mount id, mount attributes etc.) using STATMOUNT_MNT_BASIC. + * + * [Algorithm] + * + * - create a mount point + * - create a new parent folder inside the mount point and obtain its mount info + * - create the new "/" mount folder and obtain its mount info + * - run statmount() on the mount point using STATMOUNT_MNT_BASIC + * - read results and check if mount info are correct + */ + +#define _GNU_SOURCE + +#include "statmount.h" +#include "lapi/stat.h" +#include "lapi/sched.h" + +#define DIR_A "LTP_DIR_A" +#define DIR_B "LTP_DIR_B" + +static uint64_t mnt_id; +static uint64_t mnt_id_old; +static uint64_t parent_id; +static uint64_t parent_id_old; +static uint64_t mnt_peer_group; +static uint64_t mnt_master; +static struct statmount *st_mount; + +static void read_mnt_id( + const char *path, + uint64_t *mnt_id, + uint64_t *mnt_id_unique) +{ + struct ltp_statx sx; + + if (mnt_id) { + SAFE_STATX(AT_FDCWD, path, 0, STATX_MNT_ID, &sx); + *mnt_id = sx.data.stx_mnt_id; + } + + if (mnt_id_unique) { + SAFE_STATX(AT_FDCWD, path, 0, STATX_MNT_ID_UNIQUE, &sx); + *mnt_id_unique = sx.data.stx_mnt_id; + } +} + +static struct tcase { + uint64_t prop_type; + char *msg; +} tcases[] = { + { MS_PRIVATE, TST_TO_STR_(MS_PRIVATE) }, + { MS_SHARED, TST_TO_STR_(MS_SHARED) }, + { MS_SLAVE, TST_TO_STR_(MS_SLAVE) }, + { MS_UNBINDABLE, TST_TO_STR_(MS_UNBINDABLE) }, +}; + +static void run(unsigned int i) +{ + struct tcase *tc = &tcases[i]; + + tst_res(TINFO, "Testing statmount() on %s", tc->msg); + + SAFE_MOUNT(DIR_B, DIR_A, "none", MS_BIND, NULL); + SAFE_MOUNT("none", DIR_A, "none", tc->prop_type, NULL); + read_mnt_id(DIR_A, &mnt_id_old, &mnt_id); + + memset(st_mount, 0, sizeof(struct statmount)); + + TST_EXP_PASS(statmount(mnt_id, STATMOUNT_MNT_BASIC, st_mount, + sizeof(struct statmount), 0)); + + SAFE_UMOUNT(DIR_A); + + if (TST_RET == -1) + return; + + /* s->sm.mnt_peer_group = IS_MNT_SHARED(m) ? m->mnt_group_id : 0; + * s->sm.mnt_master = IS_MNT_SLAVE(m) ? m->mnt_master->mnt_group_id : 0; + */ + mnt_peer_group = tc->prop_type == MS_SHARED ? read_peer_group(DIR_A) : 0; + mnt_master = tc->prop_type == MS_SLAVE ? read_peer_group(DIR_A) : 0; + + TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_MNT_BASIC); + TST_EXP_EQ_LI(st_mount->size, sizeof(struct statmount)); + TST_EXP_EQ_LI(st_mount->mnt_id, mnt_id); + TST_EXP_EQ_LI(st_mount->mnt_id_old, mnt_id_old); + TST_EXP_EQ_LI(st_mount->mnt_parent_id, parent_id); + TST_EXP_EQ_LI(st_mount->mnt_parent_id_old, parent_id_old); + TST_EXP_EQ_LU(st_mount->mnt_propagation & tc->prop_type, tc->prop_type); + TST_EXP_EQ_LI(st_mount->mnt_master, mnt_master); + TST_EXP_EQ_LI(st_mount->mnt_peer_group, mnt_peer_group); +} + +static void setup(void) +{ + SAFE_MKDIR(DIR_A, 0700); + SAFE_MKDIR(DIR_B, 0700); + + SAFE_UNSHARE(CLONE_NEWNS); + SAFE_MOUNT("none", "/", "none", MS_REC | MS_PRIVATE, NULL); + + SAFE_MOUNT(DIR_B, DIR_B, "none", MS_BIND, NULL); + SAFE_MOUNT("none", DIR_B, "none", MS_SHARED, NULL); + + read_mnt_id(DIR_A, &parent_id_old, &parent_id); +} + +static void cleanup(void) +{ + if (tst_is_mounted(DIR_B)) + SAFE_UMOUNT(DIR_B); + + if (tst_is_mounted(DIR_A)) + SAFE_UMOUNT(DIR_A); +} + +static struct tst_test test = { + .test = run, + .tcnt = ARRAY_SIZE(tcases), + .setup = setup, + .cleanup = cleanup, + .min_kver = "6.8", + .needs_tmpdir = 1, + .bufs = (struct tst_buffers []) { + {&st_mount, .size = sizeof(struct statmount)}, + {} + } +};