diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-30 12:38:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-08-30 12:38:13 -0700 |
| commit | 6f01c935d96cd4eb8bbbc5249bd9a754b6939e0a (patch) | |
| tree | 4221926366762159db02ee7f2b79658faa9ce9f9 /fs/namespace.c | |
| parent | 451819aa5ad0a22b23f0eb178816dc72b73ab903 (diff) | |
| parent | 2949e8427af3bb74a1e26354cb68c1700663c827 (diff) | |
Merge tag 'locks-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux
Pull file locking updates from Jeff Layton:
"This starts with a couple of fixes for potential deadlocks in the
fowner/fasync handling.
The next patch removes the old mandatory locking code from the kernel
altogether.
The last patch cleans up rw_verify_area a bit more after the mandatory
locking removal"
* tag 'locks-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux:
fs: clean up after mandatory file locking support removal
fs: remove mandatory file locking support
fcntl: fix potential deadlock for &fasync_struct.fa_lock
fcntl: fix potential deadlocks for &fown_struct.lock
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 29 |
1 files changed, 10 insertions, 19 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 97adcb5ab5d5..20caa4b4c539 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1715,22 +1715,14 @@ static inline bool may_mount(void) return ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN); } -#ifdef CONFIG_MANDATORY_FILE_LOCKING -static bool may_mandlock(void) +static void warn_mandlock(void) { - pr_warn_once("======================================================\n" - "WARNING: the mand mount option is being deprecated and\n" - " will be removed in v5.15!\n" - "======================================================\n"); - return capable(CAP_SYS_ADMIN); + pr_warn_once("=======================================================\n" + "WARNING: The mand mount option has been deprecated and\n" + " and is ignored by this kernel. Remove the mand\n" + " option from the mount to silence this warning.\n" + "=======================================================\n"); } -#else -static inline bool may_mandlock(void) -{ - pr_warn("VFS: \"mand\" mount option not supported"); - return false; -} -#endif static int can_umount(const struct path *path, int flags) { @@ -3197,8 +3189,8 @@ int path_mount(const char *dev_name, struct path *path, return ret; if (!may_mount()) return -EPERM; - if ((flags & SB_MANDLOCK) && !may_mandlock()) - return -EPERM; + if (flags & SB_MANDLOCK) + warn_mandlock(); /* Default to relatime unless overriden */ if (!(flags & MS_NOATIME)) @@ -3581,9 +3573,8 @@ SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags, if (fc->phase != FS_CONTEXT_AWAITING_MOUNT) goto err_unlock; - ret = -EPERM; - if ((fc->sb_flags & SB_MANDLOCK) && !may_mandlock()) - goto err_unlock; + if (fc->sb_flags & SB_MANDLOCK) + warn_mandlock(); newmount.mnt = vfs_create_mount(fc); if (IS_ERR(newmount.mnt)) { |