diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2022-03-01 00:05:29 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2022-05-19 23:25:10 -0400 |
| commit | a5f85d7834f7e1456e799c79a2a83fc11b90cfe2 (patch) | |
| tree | be51d3f60e7b1b8697e6c825a58914f11c3ca838 | |
| parent | 3123109284176b1532874591f7c81f3837bbdc17 (diff) | |
uninline may_mount() and don't opencode it in fspick(2)/fsopen(2)
It's done once per (mount-related) syscall and there's no point
whatsoever making it inline.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/fsopen.c | 4 | ||||
| -rw-r--r-- | fs/internal.h | 1 | ||||
| -rw-r--r-- | fs/namespace.c | 2 |
3 files changed, 4 insertions, 3 deletions
diff --git a/fs/fsopen.c b/fs/fsopen.c index 27a890aa493a..fc9d2d9fd234 100644 --- a/fs/fsopen.c +++ b/fs/fsopen.c @@ -119,7 +119,7 @@ SYSCALL_DEFINE2(fsopen, const char __user *, _fs_name, unsigned int, flags) const char *fs_name; int ret; - if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN)) + if (!may_mount()) return -EPERM; if (flags & ~FSOPEN_CLOEXEC) @@ -162,7 +162,7 @@ SYSCALL_DEFINE3(fspick, int, dfd, const char __user *, path, unsigned int, flags unsigned int lookup_flags; int ret; - if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN)) + if (!may_mount()) return -EPERM; if ((flags & ~(FSPICK_CLOEXEC | diff --git a/fs/internal.h b/fs/internal.h index 08503dc68d2b..09ed7fe12b73 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -84,6 +84,7 @@ extern int __mnt_want_write_file(struct file *); extern void __mnt_drop_write_file(struct file *); extern void dissolve_on_fput(struct vfsmount *); +extern bool may_mount(void); int path_mount(const char *dev_name, struct path *path, const char *type_page, unsigned long flags, void *data_page); diff --git a/fs/namespace.c b/fs/namespace.c index a0a36bfa3aa0..c3a80ffaf1e5 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1760,7 +1760,7 @@ out_unlock: /* * Is the caller allowed to modify his namespace? */ -static inline bool may_mount(void) +bool may_mount(void) { return ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN); } |