[LTP] [PATCH 1/2] kernel/fs/fs-notify: fsnotify stress tests

Murphy Zhou jencce.kernel@gmail.com
Tue Jan 25 09:30:49 CET 2022


Hi Amir,

On Tue, Jan 25, 2022 at 09:29:47AM +0200, Amir Goldstein wrote:
> On Tue, Jan 25, 2022 at 4:47 AM Murphy Zhou <jencce.kernel@gmail.com> wrote:
> >
> > Exercise fsnotify and inotify interfaces while IO going on.
> 
> Hi Murphy,
> 
> It's worth documenting in main test script that this test
> was created as a regression test for commit
> 4396a73115fc fsnotify: fix sb_connectors leak

Ah, the tests were created for the goal of stress test. This leak
was one of the bugs that this test found.

> 
> Can you elaborate a bit more about the expectation from this test.
> I do not see any error checking in the main script.

Sure. Will explain more.

> Is any perror supposed to fail the test?

No.

> Is its purpose to catch kernel dmesg splats of all sorts?

Not needed.

My intend is to use these interfaces insanely a while, if kernel 
does not panic or hang, pass. This test is not checking *notify
function which has already been covered.

> 
> In your original post you wrote that bug makes the test hang:
> https://lore.kernel.org/linux-fsdevel/20210907063338.ycaw6wvhzrfsfdlp@xzhoux.usersys.redhat.com/
> 
> If that is the case, better mention this to the LTP maintainers.

Sure. Thanks for reviewing!

Murphy
> 
> Thanks,
> Amir.
> 
> 
> 
> 
> >
> > Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com>
> > ---
> >  testcases/kernel/fs/fs-notify/Makefile        |  18 ++
> >  .../fs/fs-notify/fanotify_flush_stress.c      |  52 ++++
> >  .../fs/fs-notify/fanotify_init_stress.c       |  32 +++
> >  .../fs/fs-notify/fanotify_mark_stress.c       |  58 +++++
> >  .../kernel/fs/fs-notify/fanotify_watch.c      | 244 ++++++++++++++++++
> >  testcases/kernel/fs/fs-notify/freadfile.c     |  27 ++
> >  .../kernel/fs/fs-notify/fsnotify-stress.sh    |  64 +++++
> >  testcases/kernel/fs/fs-notify/fwritefile.c    |  27 ++
> >  .../fs/fs-notify/inotify_add_rm_stress.c      |  36 +++
> >  .../kernel/fs/fs-notify/inotify_init_stress.c |  22 ++
> >  .../fs/fs-notify/inotify_inmodify_stress.c    |  17 ++
> >  testcases/kernel/fs/fs-notify/inotify_watch.c |  98 +++++++
> >  testcases/kernel/fs/fs-notify/readfile.c      |  28 ++
> >  testcases/kernel/fs/fs-notify/rw_files.sh     |  90 +++++++
> >  testcases/kernel/fs/fs-notify/writefile.c     |  28 ++
> >  15 files changed, 841 insertions(+)
> >  create mode 100644 testcases/kernel/fs/fs-notify/Makefile
> >  create mode 100644 testcases/kernel/fs/fs-notify/fanotify_flush_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/fanotify_init_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/fanotify_mark_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/fanotify_watch.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/freadfile.c
> >  create mode 100755 testcases/kernel/fs/fs-notify/fsnotify-stress.sh
> >  create mode 100644 testcases/kernel/fs/fs-notify/fwritefile.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/inotify_add_rm_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/inotify_init_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/inotify_inmodify_stress.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/inotify_watch.c
> >  create mode 100644 testcases/kernel/fs/fs-notify/readfile.c
> >  create mode 100755 testcases/kernel/fs/fs-notify/rw_files.sh
> >  create mode 100644 testcases/kernel/fs/fs-notify/writefile.c
> >
> > diff --git a/testcases/kernel/fs/fs-notify/Makefile b/testcases/kernel/fs/fs-notify/Makefile
> > new file mode 100644
> > index 000000000..328783942
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/Makefile
> > @@ -0,0 +1,18 @@
> > +#
> > +#    kernel/fs/fs-notify testcases Makefile.
> > +#
> > +
> > +top_srcdir                     ?= ../../../..
> > +
> > +include $(top_srcdir)/include/mk/testcases.mk
> > +
> > +BINARIES:=fanotify_flush_stress fanotify_init_stress \
> > +fanotify_mark_stress fanotify_watch inotify_watch \
> > +inotify_add_rm_stress inotify_init_stress inotify_inmodify_stress\
> > +writefile freadfile fwritefile readfile
> > +
> > +INSTALL_TARGETS                        := fsnotify-stress.sh $(BINARIES) rw_files.sh
> > +
> > +MAKE_TARGETS                   := $(BINARIES)
> > +
> > +include $(top_srcdir)/include/mk/generic_leaf_target.mk
> > diff --git a/testcases/kernel/fs/fs-notify/fanotify_flush_stress.c b/testcases/kernel/fs/fs-notify/fanotify_flush_stress.c
> > new file mode 100644
> > index 000000000..493acfb56
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fanotify_flush_stress.c
> > @@ -0,0 +1,52 @@
> > +#define _GNU_SOURCE     /* Needed to get O_LARGEFILE definition */
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <limits.h>
> > +#include <poll.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <sys/fanotify.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       char buf;
> > +       int fd;
> > +
> > +       /* Create the file descriptor for accessing the fanotify API */
> > +       fd = fanotify_init(FAN_CLOEXEC | FAN_CLASS_CONTENT | FAN_NONBLOCK,
> > +                                          O_RDONLY | O_LARGEFILE);
> > +       if (fd == -1) {
> > +               perror("fanotify_init");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       /* Loop marking all kinds of events and flush */
> > +       while (1) {
> > +
> > +               if (fanotify_mark(fd, FAN_MARK_ADD | FAN_MARK_MOUNT,
> > +                         FAN_ACCESS | FAN_MODIFY | FAN_OPEN_PERM | FAN_CLOSE |
> > +                         FAN_OPEN | FAN_ACCESS_PERM | FAN_ONDIR |
> > +                         FAN_EVENT_ON_CHILD, -1, argv[1]) == -1)
> > +
> > +                       perror("fanotify_mark add");
> > +
> > +               if (fanotify_mark(fd, FAN_MARK_FLUSH | FAN_MARK_MOUNT,
> > +                                               0, -1, argv[1]) == -1)
> > +                       perror("fanotify_mark flush mount");
> > +
> > +               if (fanotify_mark(fd, FAN_MARK_ADD | FAN_MARK_MOUNT,
> > +                         FAN_ACCESS | FAN_MODIFY | FAN_OPEN_PERM | FAN_CLOSE |
> > +                         FAN_OPEN | FAN_ACCESS_PERM | FAN_ONDIR |
> > +                         FAN_EVENT_ON_CHILD, -1, argv[1]) == -1)
> > +
> > +                       perror("fanotify_mark add");
> > +
> > +               if (fanotify_mark(fd, FAN_MARK_FLUSH, 0, -1, argv[1]) == -1)
> > +                       perror("fanotify_mark flush");
> > +       }
> > +
> > +       close(fd);
> > +       exit(EXIT_SUCCESS);
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/fanotify_init_stress.c b/testcases/kernel/fs/fs-notify/fanotify_init_stress.c
> > new file mode 100644
> > index 000000000..d11924b57
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fanotify_init_stress.c
> > @@ -0,0 +1,32 @@
> > +#define _GNU_SOURCE     /* Needed to get O_LARGEFILE definition */
> > +#include <errno.h>
> > +#include <stdio.h>
> > +#include <unistd.h>
> > +#include <fcntl.h>
> > +#include <stdlib.h>
> > +#include <sys/fanotify.h>
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       char buf;
> > +       int fd;
> > +       while (1) {
> > +
> > +               /* Create the file descriptor for accessing the fanotify API */
> > +               fd = fanotify_init(FAN_CLOEXEC | FAN_CLASS_CONTENT |
> > +                               FAN_NONBLOCK, O_RDONLY | O_LARGEFILE);
> > +               if (fd == -1)
> > +                       perror("fanotify_init");
> > +
> > +               if (fanotify_mark(fd, FAN_MARK_ADD | FAN_MARK_MOUNT,
> > +                               FAN_ACCESS | FAN_MODIFY | FAN_OPEN_PERM |
> > +                               FAN_CLOSE | FAN_OPEN | FAN_ACCESS_PERM |
> > +                               FAN_ONDIR | FAN_EVENT_ON_CHILD, -1,
> > +                               argv[1]) == -1)
> > +                       perror("fanotify_mark");
> > +
> > +               close(fd);
> > +       }
> > +
> > +       exit(EXIT_SUCCESS);
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/fanotify_mark_stress.c b/testcases/kernel/fs/fs-notify/fanotify_mark_stress.c
> > new file mode 100644
> > index 000000000..7f648e103
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fanotify_mark_stress.c
> > @@ -0,0 +1,58 @@
> > +#define _GNU_SOURCE     /* Needed to get O_LARGEFILE definition */
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <limits.h>
> > +#include <poll.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <sys/fanotify.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +
> > +void add_mark(int fd, uint64_t mask, char *path)
> > +{
> > +       if (fanotify_mark(fd, FAN_MARK_ADD, mask, -1, path) == -1)
> > +               perror("fanotify_mark add");
> > +}
> > +
> > +void remove_mark(int fd, uint64_t mask, char *path)
> > +{
> > +       if (fanotify_mark(fd, FAN_MARK_REMOVE, mask, -1, path) == -1)
> > +               perror("fanotify_mark remove");
> > +}
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       char buf;
> > +       int fd;
> > +       /* Create the file descriptor for accessing the fanotify API */
> > +       fd = fanotify_init(FAN_CLOEXEC | FAN_CLASS_CONTENT | FAN_NONBLOCK,
> > +                                          O_RDONLY | O_LARGEFILE);
> > +       if (fd == -1) {
> > +               perror("fanotify_init");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       /* Loop marking all kinds of events */
> > +       while (1) {
> > +               add_mark(fd, FAN_ACCESS, argv[1]);
> > +               remove_mark(fd, FAN_ACCESS, argv[1]);
> > +               add_mark(fd, FAN_MODIFY, argv[1]);
> > +               remove_mark(fd, FAN_MODIFY, argv[1]);
> > +               add_mark(fd, FAN_OPEN_PERM, argv[1]);
> > +               remove_mark(fd, FAN_OPEN_PERM, argv[1]);
> > +               add_mark(fd, FAN_CLOSE, argv[1]);
> > +               remove_mark(fd, FAN_CLOSE, argv[1]);
> > +               add_mark(fd, FAN_OPEN, argv[1]);
> > +               remove_mark(fd, FAN_OPEN, argv[1]);
> > +               add_mark(fd, FAN_ACCESS_PERM, argv[1]);
> > +               remove_mark(fd, FAN_ACCESS_PERM, argv[1]);
> > +               add_mark(fd, FAN_ONDIR, argv[1]);
> > +               remove_mark(fd, FAN_ONDIR, argv[1]);
> > +               add_mark(fd, FAN_EVENT_ON_CHILD, argv[1]);
> > +               remove_mark(fd, FAN_EVENT_ON_CHILD, argv[1]);
> > +       }
> > +
> > +       close(fd);
> > +       exit(EXIT_SUCCESS);
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/fanotify_watch.c b/testcases/kernel/fs/fs-notify/fanotify_watch.c
> > new file mode 100644
> > index 000000000..1028e0e30
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fanotify_watch.c
> > @@ -0,0 +1,244 @@
> > +/* Example in man 7 fanotify */
> > +
> > +#define _GNU_SOURCE     /* Needed to get O_LARGEFILE definition */
> > +#include <errno.h>
> > +#include <fcntl.h>
> > +#include <limits.h>
> > +#include <poll.h>
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <sys/fanotify.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +
> > +/* get comm for pid from /proc/pid/comm */
> > +static char * get_comm_pid(unsigned int pid)
> > +{
> > +       char * proc_name;
> > +       char * comm;
> > +       int comm_fd, cnt;
> > +
> > +       proc_name = (char *)malloc(50);
> > +       if (proc_name != NULL)
> > +               sprintf(proc_name, "/proc/%u/comm\0", pid);
> > +       else
> > +               return NULL;
> > +
> > +       comm = (char *)malloc(50);
> > +       if (comm != NULL)
> > +               memset(comm, 0, 50);
> > +       else
> > +               return NULL;
> > +
> > +       comm_fd = open(proc_name, O_RDONLY);
> > +       if (comm_fd != -1) {
> > +               cnt = read(comm_fd, comm, 50);
> > +               if (cnt != -1) {
> > +                       comm[cnt] = '\0';
> > +                       close(comm_fd);
> > +                       return comm;
> > +               }
> > +               close(comm_fd);
> > +       }
> > +
> > +       return NULL;
> > +}
> > +
> > +/* Read all available fanotify events from the file descriptor 'fd' */
> > +
> > +static void handle_events(int fd)
> > +{
> > +       const struct fanotify_event_metadata *metadata;
> > +       struct fanotify_event_metadata buf[200];
> > +       ssize_t len;
> > +       char path[PATH_MAX];
> > +       ssize_t path_len;
> > +       char procfd_path[PATH_MAX];
> > +       struct fanotify_response response;
> > +
> > +       /* Loop while events can be read from fanotify file descriptor */
> > +       for(;;) {
> > +
> > +               /* Read some events */
> > +               len = read(fd, (void *) &buf, sizeof(buf));
> > +               if (len == -1 && errno != EAGAIN) {
> > +                       perror("read");
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +
> > +               /* Check if end of available data reached */
> > +               if (len <= 0)
> > +                       break;
> > +
> > +               /* Point to the first event in the buffer */
> > +               metadata = buf;
> > +
> > +               /* Loop over all events in the buffer */
> > +               while (FAN_EVENT_OK(metadata, len)) {
> > +
> > +                       /* Check that run-time and compile-time structures match */
> > +
> > +                       if (metadata->vers != FANOTIFY_METADATA_VERSION) {
> > +                               fprintf(stderr,
> > +                                   "Mismatch of fanotify metadata version.\n");
> > +                               exit(EXIT_FAILURE);
> > +                       }
> > +
> > +                       /* metadata->fd contains either FAN_NOFD, indicating a
> > +                          queue overflow, or a file descriptor (a nonnegative
> > +                          integer). Here, we simply ignore queue overflow. */
> > +
> > +                       if (metadata->fd >= 0) {
> > +
> > +                               /* Handle open permission event */
> > +                               if (metadata->mask & FAN_OPEN_PERM) {
> > +                                       printf("FAN_OPEN_PERM: ");
> > +
> > +                                       /* Allow file to be opened */
> > +                                       response.fd = metadata->fd;
> > +                                       response.response = FAN_ALLOW;
> > +                                       write(fd, &response,
> > +                                           sizeof(struct fanotify_response));
> > +                               }
> > +
> > +                               /* Handle access permission event */
> > +                               if (metadata->mask & FAN_ACCESS_PERM) {
> > +                                       printf("FAN_ACCESS_PERM: ");
> > +
> > +                                       /* Allow file to be accessed */
> > +                                       response.fd = metadata->fd;
> > +                                       response.response = FAN_ALLOW;
> > +                                       write(fd, &response,
> > +                                           sizeof(struct fanotify_response));
> > +                               }
> > +
> > +                               /* Handle closing of writable file event */
> > +                               if (metadata->mask & FAN_CLOSE_WRITE)
> > +                                       printf("FAN_CLOSE_WRITE: ");
> > +
> > +                               /* Handle closing of not writable file event */
> > +                               if (metadata->mask & FAN_CLOSE_NOWRITE)
> > +                                       printf("FAN_CLOSE_NOWRITE: ");
> > +
> > +                               /* Handle modify file event */
> > +                               if (metadata->mask & FAN_MODIFY)
> > +                                       printf("FAN_MODIFY: ");
> > +
> > +                               /* Handle open event */
> > +                               if (metadata->mask & FAN_OPEN)
> > +                                       printf("FAN_OPEN: ");
> > +
> > +                               /* Handle access event */
> > +                               if (metadata->mask & FAN_ACCESS)
> > +                                       printf("FAN_ACCESS: ");
> > +
> > +                               /* Handle access event */
> > +                               if (metadata->mask & FAN_ONDIR)
> > +                                       printf("FAN_ONDIR: ");
> > +
> > +                               /* Handle access event */
> > +                               if (metadata->mask & FAN_EVENT_ON_CHILD)
> > +                                       printf("FAN_EVENT_ON_CHILD: ");
> > +
> > +                               /* Retrieve/print the accessed file path*/
> > +                               snprintf(procfd_path, sizeof(procfd_path),
> > +                                           "/proc/self/fd/%d", metadata->fd);
> > +                               path_len = readlink(procfd_path, path,
> > +                                           sizeof(path) - 1);
> > +                               if (path_len == -1) {
> > +                                       perror("readlink");
> > +                                       exit(EXIT_FAILURE);
> > +                               }
> > +
> > +                               path[path_len] = '\0';
> > +                               printf("File %s.\t\t Comm %s", path,
> > +                                       get_comm_pid(metadata->pid));
> > +
> > +                               /* Close the file descriptor of the event */
> > +
> > +                               close(metadata->fd);
> > +                       }
> > +
> > +                       /* Advance to next event */
> > +                       metadata = FAN_EVENT_NEXT(metadata, len);
> > +               }
> > +       }
> > +}
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       char buf;
> > +       int fd, poll_num;
> > +       nfds_t nfds;
> > +       struct pollfd fds[2];
> > +       FILE *f;
> > +#if 0
> > +       /* Check mount point is supplied */
> > +       if (argc != 2) {
> > +               fprintf(stderr, "Usage: %s MOUNT\n", argv[0]);
> > +               exit(EXIT_FAILURE);
> > +       }
> > +#endif
> > +       printf("%s on %s\n", argv[0], argv[1]);
> > +       fflush(stdout);
> > +       f = freopen("fanotify.log", "w+", stdout);
> > +       if (f == NULL) {
> > +               perror("freopen");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       /* Create the file descriptor for accessing the fanotify API */
> > +       fd = fanotify_init(FAN_CLOEXEC | FAN_CLASS_CONTENT | FAN_NONBLOCK,
> > +                                          O_RDONLY | O_LARGEFILE);
> > +       if (fd == -1) {
> > +               perror("fanotify_init");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       /* Mark the mount for:
> > +          - permission events before opening files
> > +          - notification events after closing a write-enabled
> > +                file descriptor */
> > +       if (fanotify_mark(fd, FAN_MARK_ADD | FAN_MARK_MOUNT,
> > +                       FAN_ACCESS | FAN_MODIFY | FAN_OPEN_PERM |
> > +                       FAN_CLOSE | FAN_OPEN | FAN_ACCESS_PERM |
> > +                       FAN_ONDIR | FAN_EVENT_ON_CHILD,
> > +                       -1, argv[1]) == -1) {
> > +
> > +               perror("fanotify_mark");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       /* Prepare for polling */
> > +       nfds = 1;
> > +
> > +       /* Fanotify input */
> > +       fds[0].fd = fd;
> > +       fds[0].events = POLLIN;
> > +
> > +       /* This is the loop to wait for incoming events */
> > +       printf("Listening for events.\n");
> > +       while (1) {
> > +               poll_num = poll(fds, nfds, -1);
> > +               if (poll_num == -1) {
> > +                       if (errno == EINTR)     /* Interrupted by a signal */
> > +                               continue;           /* Restart poll() */
> > +
> > +                       perror("poll");         /* Unexpected error */
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +
> > +               if (poll_num > 0) {
> > +
> > +                       if (fds[0].revents & POLLIN) {
> > +
> > +                               /* Fanotify events are available */
> > +                               handle_events(fd);
> > +                       }
> > +               }
> > +       }
> > +
> > +       fclose(f);
> > +       printf("Listening for events stopped.\n");
> > +       exit(EXIT_SUCCESS);
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/freadfile.c b/testcases/kernel/fs/fs-notify/freadfile.c
> > new file mode 100644
> > index 000000000..24bf76bcd
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/freadfile.c
> > @@ -0,0 +1,27 @@
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +
> > +int main(int argc, char **argv)
> > +{
> > +       int fd;
> > +       char buf[BUFSIZ];
> > +       FILE *f;
> > +
> > +       memset(buf, 1, BUFSIZ);
> > +       while(1) {
> > +               f = fopen(argv[1], "r+");
> > +               if (f == NULL) {
> > +                       perror("freadfile fopen");
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +               fread(buf, sizeof(char), BUFSIZ, f);
> > +               usleep(1);
> > +       }
> > +       fclose(f);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/fsnotify-stress.sh b/testcases/kernel/fs/fs-notify/fsnotify-stress.sh
> > new file mode 100755
> > index 000000000..d6fd5482b
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fsnotify-stress.sh
> > @@ -0,0 +1,64 @@
> > +#!/bin/bash
> > +
> > +export TIMEOUT=10
> > +
> > +STRESSES="fanotify_flush_stress fanotify_init_stress \
> > +fanotify_mark_stress fanotify_watch inotify_watch \
> > +inotify_add_rm_stress inotify_init_stress inotify_inmodify_stress"
> > +IO_OPES="writefile freadfile fwritefile readfile"
> > +
> > +NR_CPUS=$(grep -c processor /proc/cpuinfo)
> > +[ $NR_CPUS -lt 4 ] && NR_CPUS=4
> > +
> > +function cleanup_processes()
> > +{
> > +       while ps -eo pid,comm | \
> > +               grep -q -E "fanotify|inotify|rw_files|readfile|writefile" ; do
> > +               killall rw_files.sh $STRESSES $IO_OPES > /dev/null 2>&1
> > +               sleep 1
> > +       done
> > +}
> > +
> > +function cleanup()
> > +{
> > +       sleep 3 # waiting possible unfinished processes
> > +       cleanup_processes
> > +       rm -f $STRESSES $IO_OPES fanotify.log inotify.log tmp
> > +       cd /
> > +       sync
> > +}
> > +
> > +function run_stress()
> > +{
> > +       local i j rcnt=0
> > +       echo -e "* CPU count: $NR_CPUS"
> > +       echo -e "* TIMEOUT for each subcase: $TIMEOUT"
> > +
> > +       echo -e "* Starting fsnotify stress on directory and regular file"
> > +       touch $TMPDIR/testfile
> > +       >tmp
> > +       for i in $STRESSES $IO_OPES rw_files.sh; do
> > +               for j in $STRESSES ; do
> > +                       [ "$i" == "$j" ] && continue
> > +                       # skip duplicate combinations
> > +                       grep -w $j tmp | grep -qw $i && continue
> > +                       echo -e "* Starting $i and $j, rcnt $rcnt"
> > +                       ./$i $TMPDIR $TIMEOUT > /dev/null 2>&1 &
> > +                       ./$i $TMPDIR/testfile $TIMEOUT > /dev/null 2>&1 &
> > +                       ./$j $TMPDIR $TIMEOUT > /dev/null 2>&1 &
> > +                       ./$j $TMPDIR/testfile $TIMEOUT > /dev/null 2>&1 &
> > +                       sleep $TIMEOUT
> > +                       cleanup_processes
> > +                       echo -e "$i $j" >> tmp
> > +                       ((rcnt++))
> > +               done
> > +       done
> > +}
> > +
> > +trap "cleanup; exit;" 2
> > +
> > +echo "***** Starting tests *****"
> > +run_stress
> > +
> > +echo -e "\n***** Cleanup fanotify inotify device *****"
> > +cleanup
> > diff --git a/testcases/kernel/fs/fs-notify/fwritefile.c b/testcases/kernel/fs/fs-notify/fwritefile.c
> > new file mode 100644
> > index 000000000..a2956d60b
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/fwritefile.c
> > @@ -0,0 +1,27 @@
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +
> > +int main(int argc, char **argv)
> > +{
> > +       int fd;
> > +       char buf[BUFSIZ];
> > +       FILE *f;
> > +
> > +       memset(buf, 1, BUFSIZ);
> > +       while(1) {
> > +               f = fopen(argv[1], "w+");
> > +               if (f == NULL) {
> > +                       perror("fwritefile fopen");
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +               fwrite(buf, sizeof(char), BUFSIZ, f);
> > +               usleep(1);
> > +       }
> > +       fclose(f);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/inotify_add_rm_stress.c b/testcases/kernel/fs/fs-notify/inotify_add_rm_stress.c
> > new file mode 100644
> > index 000000000..e88fc088e
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/inotify_add_rm_stress.c
> > @@ -0,0 +1,36 @@
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +#include <unistd.h>
> > +#include <stdlib.h>
> > +#include <dirent.h>
> > +#include <stdio.h>
> > +#include <sys/inotify.h>
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       int notify_fd;
> > +       int wd, ret;
> > +
> > +       notify_fd = inotify_init1(IN_CLOEXEC);
> > +       if (notify_fd == -1) {
> > +               perror("inotify_init1");
> > +               return -1;
> > +       }
> > +
> > +       while (1) {
> > +               wd = inotify_add_watch(notify_fd, argv[1],
> > +                       IN_ACCESS | IN_ATTRIB | IN_CLOSE_WRITE |
> > +                       IN_CLOSE_NOWRITE | IN_CREATE | IN_DELETE |
> > +                       IN_DELETE_SELF | IN_MODIFY | IN_MOVE_SELF |
> > +                       IN_MOVED_FROM | IN_MOVED_TO | IN_OPEN);
> > +               if (wd < 0)
> > +                       perror("inotify_add_watch");
> > +
> > +               ret = inotify_rm_watch(notify_fd, wd);
> > +               if (ret < 0)
> > +                       perror("inotify_rm_watch");
> > +       }
> > +       close(notify_fd);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/inotify_init_stress.c b/testcases/kernel/fs/fs-notify/inotify_init_stress.c
> > new file mode 100644
> > index 000000000..62cb7c2e6
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/inotify_init_stress.c
> > @@ -0,0 +1,22 @@
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +#include <unistd.h>
> > +#include <stdlib.h>
> > +#include <dirent.h>
> > +#include <stdio.h>
> > +#include <sys/inotify.h>
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       int notify_fd;
> > +       int wd;
> > +
> > +       while (1) {
> > +               notify_fd = inotify_init1(IN_CLOEXEC);
> > +               if (notify_fd == -1)
> > +                       perror("inotify_init1");
> > +               close(notify_fd);
> > +       }
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/inotify_inmodify_stress.c b/testcases/kernel/fs/fs-notify/inotify_inmodify_stress.c
> > new file mode 100644
> > index 000000000..546ccb76f
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/inotify_inmodify_stress.c
> > @@ -0,0 +1,17 @@
> > +#include <sys/inotify.h>
> > +#include <stdio.h>
> > +#include <unistd.h>
> > +
> > +/*
> > + * Calls inotify_rm_watch in a loop.
> > + */
> > +int main(int argc, char **argv)
> > +{
> > +       int fd = inotify_init();
> > +       while (1) {
> > +               int wd = inotify_add_watch(fd, argv[1], IN_MODIFY);
> > +               inotify_rm_watch(fd, wd);
> > +       }
> > +       close(fd);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/inotify_watch.c b/testcases/kernel/fs/fs-notify/inotify_watch.c
> > new file mode 100644
> > index 000000000..b4b908b6b
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/inotify_watch.c
> > @@ -0,0 +1,98 @@
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +#include <unistd.h>
> > +#include <stdlib.h>
> > +#include <dirent.h>
> > +#include <stdio.h>
> > +#include <sys/inotify.h>
> > +
> > +int main(int argc, char *argv[])
> > +{
> > +       int notify_fd;
> > +       int wd, ret;
> > +       char *buf;
> > +       FILE *f;
> > +
> > +       f = freopen("inotify.log", "w+", stdout);
> > +       if (f == NULL) {
> > +               perror("freopen");
> > +               exit(EXIT_FAILURE);
> > +       }
> > +
> > +       buf = malloc(sizeof(struct inotify_event) + NAME_MAX + 1);
> > +       if (buf == NULL) {
> > +               perror("malloc");
> > +               return -1;
> > +       }
> > +
> > +       notify_fd = inotify_init1(IN_CLOEXEC);
> > +       if (notify_fd == -1) {
> > +               perror("inotify_init1");
> > +               return -1;
> > +       }
> > +
> > +       wd = inotify_add_watch(notify_fd, argv[1],
> > +               IN_ACCESS | IN_ATTRIB | IN_CLOSE_WRITE | IN_CLOSE_NOWRITE |
> > +               IN_CREATE | IN_DELETE | IN_DELETE_SELF | IN_MODIFY |
> > +               IN_MOVE_SELF | IN_MOVED_FROM | IN_MOVED_TO | IN_OPEN);
> > +
> > +       if (wd < 0) {
> > +               perror("inotify_add_watch");
> > +               return -1;
> > +       }
> > +
> > +       while (ret = read(notify_fd, buf, NAME_MAX) != -1) {
> > +               struct inotify_event *ip = (struct inotify_event *)buf;
> > +               printf("name %s event ", ip->name);
> > +               switch (ip->mask) {
> > +               case IN_ACCESS:
> > +                       printf("access\n");
> > +                       break;
> > +               case IN_ATTRIB:
> > +                       printf("attrib\n");
> > +                       break;
> > +               case IN_CLOSE_WRITE:
> > +                       printf("close write\n");
> > +                       break;
> > +               case IN_CLOSE_NOWRITE:
> > +                       printf("close nowrite\n");
> > +                       break;
> > +               case IN_CREATE:
> > +                       printf("create\n");
> > +                       break;
> > +               case IN_DELETE:
> > +                       printf("delete\n");
> > +                       break;
> > +               case IN_DELETE_SELF:
> > +                       printf("deleteself\n");
> > +                       break;
> > +               case IN_MODIFY:
> > +                       printf("modify\n");
> > +                       break;
> > +               case IN_MOVE_SELF:
> > +                       printf("move self\n");
> > +                       break;
> > +               case IN_MOVED_FROM:
> > +                       printf("move from\n");
> > +                       break;
> > +               case IN_MOVED_TO:
> > +                       printf("move to\n");
> > +                       break;
> > +               case IN_OPEN:
> > +                       printf("open\n");
> > +                       break;
> > +               default:
> > +                       printf("\n");
> > +                       break;
> > +               };
> > +       }
> > +
> > +       ret = inotify_rm_watch(notify_fd, wd);
> > +       if (ret < 0)
> > +               perror("inotify_rm_watch");
> > +
> > +       fclose(f);
> > +       close(notify_fd);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/readfile.c b/testcases/kernel/fs/fs-notify/readfile.c
> > new file mode 100644
> > index 000000000..2ab1a3694
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/readfile.c
> > @@ -0,0 +1,28 @@
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +
> > +int main(int argc, char **argv)
> > +{
> > +       int fd, ret;
> > +       char buf[BUFSIZ];
> > +
> > +       memset(buf, 1, BUFSIZ);
> > +       while (1) {
> > +               fd = open(argv[1], O_RDWR);
> > +               if (fd == -1) {
> > +                       perror("readfile open");
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +               ret = read(fd, buf, BUFSIZ);
> > +               if (ret == -1)
> > +                       perror("readfile read");
> > +               usleep(1);
> > +       }
> > +       close(fd);
> > +       return 0;
> > +}
> > diff --git a/testcases/kernel/fs/fs-notify/rw_files.sh b/testcases/kernel/fs/fs-notify/rw_files.sh
> > new file mode 100755
> > index 000000000..bb3387160
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/rw_files.sh
> > @@ -0,0 +1,90 @@
> > +#!/bin/bash
> > +
> > +TDIR=$1
> > +TIMEO=$2
> > +
> > +[ -z "$TDIR" ] && TDIR=/tmp/
> > +[ -d $TDIR ] || TDIR=/tmp/
> > +[ -z "$TIMEO" ] && TIMEO=1m
> > +
> > +[ ! -d $TDIR ] && exit
> > +
> > +function add_files()
> > +{
> > +       local i=0
> > +
> > +       while true ; do
> > +
> > +               touch f-$i
> > +               ln -s f-$i f-$i-sym
> > +               ln f-$i f-$i-hdl
> > +
> > +               mkdir d-$i
> > +
> > +               mknod c-$i c 1 2
> > +               mknod b-$i b 1 2
> > +               mknod p-$i p
> > +
> > +               ((i++))
> > +               [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +       done
> > +}
> > +
> > +function mv_files()
> > +{
> > +       local i=0
> > +
> > +       while true ; do
> > +
> > +               mv -f f-$i f-$i-rename
> > +               mv -f f-$i-rename f-$i
> > +               ((i++))
> > +               [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +       done
> > +}
> > +
> > +function read_files()
> > +{
> > +       while true ; do
> > +
> > +               find .
> > +               cat f-*
> > +               ls d-*
> > +               [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +       done
> > +}
> > +
> > +function write_files()
> > +{
> > +       while true ; do
> > +
> > +               for j in f-* d-* c-* b-* p-* ; do
> > +                       echo 1 > $j
> > +                       echo 2 >> $j
> > +                       [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +               done
> > +               [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +       done
> > +}
> > +
> > +function rm_files()
> > +{
> > +       while true ; do
> > +
> > +               rm -rf d-* f-* c-* b-* p-*
> > +               sleep 3
> > +               [ -e stoptest ] && { echo $FUNCNAME; exit; }
> > +       done
> > +}
> > +
> > +pushd $TDIR > /dev/null 2>&1
> > +rm -f stoptest
> > +add_files > /dev/null 2>&1 &
> > +mv_files > /dev/null 2>&1 &
> > +read_files > /dev/null 2>&1 &
> > +write_files > /dev/null 2>&1 &
> > +rm_files > /dev/null 2>&1 &
> > +popd > /dev/null 2>&1
> > +
> > +sleep $TIMEO
> > +touch $TDIR/stoptest
> > diff --git a/testcases/kernel/fs/fs-notify/writefile.c b/testcases/kernel/fs/fs-notify/writefile.c
> > new file mode 100644
> > index 000000000..9025b5d95
> > --- /dev/null
> > +++ b/testcases/kernel/fs/fs-notify/writefile.c
> > @@ -0,0 +1,28 @@
> > +#include <stdio.h>
> > +#include <stdlib.h>
> > +#include <unistd.h>
> > +#include <string.h>
> > +#include <sys/types.h>
> > +#include <sys/stat.h>
> > +#include <fcntl.h>
> > +
> > +int main(int argc, char **argv)
> > +{
> > +       int fd, ret;
> > +       char buf[BUFSIZ];
> > +
> > +       memset(buf, 1, BUFSIZ);
> > +       while (1) {
> > +               fd = open(argv[1], O_RDWR);
> > +               if (fd == -1) {
> > +                       perror("writefile open");
> > +                       exit(EXIT_FAILURE);
> > +               }
> > +               ret = write(fd, buf, BUFSIZ);
> > +               if (ret == -1)
> > +                       perror("writefile write");
> > +               usleep(1);
> > +       }
> > +       close(fd);
> > +       return 0;
> > +}
> > --
> > 2.31.1
> >
> >
> > --
> > Mailing list info: https://lists.linux.it/listinfo/ltp

-- 
Murphy


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