#72641 - 31.0.50; "Unlocking file: Invalid argument" when deleting lock file on network file system

GNU bug report logs - #72641
31.0.50; "Unlocking file: Invalid argument" when deleting lock file on network file system

Package: emacs;

Reported by: Michal Nazarewicz <mina86 <at> mina86.com>

Date: Thu, 15 Aug 2024 16:03:02 UTC

Severity: normal

Merged with 70973

Found in versions 29.1, 31.0.50

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

Message #22 received at 72641 <at> debbugs.gnu.org (full text, mbox):

From: Michal Nazarewicz <mina86 <at> mina86.com> To: Paul Eggert <eggert <at> cs.ucla.edu>, Eli Zaretskii <eliz <at> gnu.org> Cc: 72641 <at> debbugs.gnu.org Subject: Re: bug#72641: 31.0.50; "Unlocking file: Invalid argument" when deleting lock file on network file system Date: Sat, 17 Aug 2024 22:03:24 +0200

This appears to be network synchronisation issue. I’ve run this program: ---------- >8 -------------------------------------------------- #include <errno.h> #include <stdio.h> #include <string.h> #include <unistd.h> void create(char *path) { int ret = symlink("dummy", path); if (ret < 0) { printf("%s: %d %s\n", path, errno, strerror(errno)); } else { printf("%s: Ok\n", path); } } int check(char *path) { char buf[1024]; ssize_t ret = readlink(path, buf, 1024); if (ret >= 0) { printf("%s: %.*s\n", path, ret, buf); return 0; } int err = errno; printf("%s: %d %s\n", path, err, strerror(err)); return err; } int main(int argc, char **argv) { char *path = argc < 2 ? "bar" : argv[1]; create(path); int loop = 0; while (check(path) != EINVAL && ++loop < 50) { usleep(100000); } return 0; } -------------------------------------------------- 8< ---------- and got the following: ---------- >8 -------------------------------------------------- /o/foo: 5 Input/output error /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 2 No such file or directory /o/foo: 22 Invalid argument -------------------------------------------------- 8< ---------- It looks like symlink(2) fails with EIO while the server creates a regular file, however it takes the client to notice another second. If you’re still interested, here’s strace when I find-file and then kill-current-buffer without saving: ---------- >8 -------------------------------------------------- faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o", 0x7ffec38f7370, 1024) = -1 EINVAL (Invalid argument) readlinkat(AT_FDCWD, "/o/foo", 0x7ffec38f74d0, 1024) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o", 0x7ffec38f72c0, 1024) = -1 EINVAL (Invalid argument) readlinkat(AT_FDCWD, "/o/foo", 0x7ffec38f7420, 1024) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o/.#foo", 0x7ffec38f13e8, 8193) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", W_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o/foo", 0x7ffec38f7470, 1024) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffec38f7750, 0) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffec38f77f0, 0) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo,v", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffec38f5860, 0) = -1 ENOENT (No such file or directory) symlink ("mpn <at> erwin.223853:1723847375", "/o/.#foo") = -1 EIO (Input/output error) readlinkat(AT_FDCWD, "/o/.#foo", 0x7ffec38f5ad8, 8193) = -1 EINVAL (Invalid argument) openat (AT_FDCWD, "/o/.#foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC) = 12 read (12, "", 8193) = 0 close (12) = 0 unlink ("/o/.#foo") = 0 -------------------------------------------------- 8< ---------- And this is strace when I find-file and then save-buffer: ---------- >8 -------------------------------------------------- faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o", 0x7ffe65452010, 1024) = -1 EINVAL (Invalid argument) readlinkat(AT_FDCWD, "/o/foo", 0x7ffe65452170, 1024) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o", 0x7ffe65451f60, 1024) = -1 EINVAL (Invalid argument) readlinkat(AT_FDCWD, "/o/foo", 0x7ffe654520c0, 1024) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o/.#foo", 0x7ffe6544c088, 8193) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", W_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) readlinkat(AT_FDCWD, "/o/foo", 0x7ffe65452110, 1024) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffe654523f0, 0) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffe65452490, 0) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo,v", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffe65450500, 0) = -1 ENOENT (No such file or directory) symlink ("mpn <at> erwin.223938:1723847375", "/o/.#foo") = -1 EIO (Input/output error) newfstatat(AT_FDCWD, "/o/foo", 0x7ffe65452690, 0) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo,v", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_CLOEXEC|O_PATH|O_DIRECTORY) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", F_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) faccessat2(AT_FDCWD, "/o/foo", W_OK, AT_EACCESS) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = -1 ENOENT (No such file or directory) newfstatat(AT_FDCWD, "/o/foo", 0x7ffe6544ff80, 0) = -1 ENOENT (No such file or directory) symlink ("mpn <at> erwin.223938:1723847375", "/o/.#foo") = -1 EEXIST (File exists) readlinkat(AT_FDCWD, "/o/.#foo", 0x7ffe65450078, 8193) = -1 EINVAL (Invalid argument) openat (AT_FDCWD, "/o/.#foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC) = 12 read (12, "", 8193) = 0 close (12) = 0 unlink ("/o/.#foo") = 0 symlink ("mpn <at> erwin.223938:1723847375", "/o/.#foo") = -1 EIO (Input/output error) openat (AT_FDCWD, "/o/foo", O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666) = 12 write (12, "ao sneuhta soneht sanoteu snothe"..., 33) = 33 close (12) = 0 newfstatat(AT_FDCWD, "/o/foo", {st_mode=S_IFREG|0600, st_size=33, ...}, 0) = 0 readlinkat(AT_FDCWD, "/o/.#foo", 0x7ffe65450028, 8193) = -1 ENOENT (No such file or directory) openat (AT_FDCWD, "/o/foo", O_RDONLY|O_NOFOLLOW|O_CLOEXEC|O_PATH) = 12 close (12) = 0 -------------------------------------------------- 8< ---------- -- Best regards ミハウ “𝓶𝓲𝓷𝓪86” ナザレヴイツ «If at first you don’t succeed, give up skydiving»

This bug report was last modified 277 days ago.

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GNU bug report logs - #72641 31.0.50; "Unlocking file: Invalid argument" when deleting lock file on network file system

GNU bug report logs - #72641
31.0.50; "Unlocking file: Invalid argument" when deleting lock file on network file system