diff options
| author | Oleg Nesterov <oleg@redhat.com> | 2009-06-16 22:07:46 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 14:19:00 -0700 |
| commit | 2f38d70fb4e97e7d00e12eaac45790cf6ebd7b22 (patch) | |
| tree | 393a604669640635a33c1db179bd053d8b923252 | |
| parent | b3fec0fe35a4ff048484f1408385a27695d4273b (diff) | |
| download | linux-2f38d70fb4e97e7d00e12eaac45790cf6ebd7b22.tar.bz2 | |
shift current_cred() from __f_setown() to f_modown()
Shift current_cred() from __f_setown() to f_modown(). This reduces
the number of arguments and saves 48 bytes from fs/fcntl.o.
[ Note: this doesn't clear euid/uid when pid is set to NULL. But if
f_owner.pid == NULL we never use f_owner.uid/euid. Otherwise we'd
have a bug anyway: we must not send signals if pid was reset to NULL. ]
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/fcntl.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index 1ad703150dee..f9c03ca3b2f4 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -198,15 +198,19 @@ static int setfl(int fd, struct file * filp, unsigned long arg) } static void f_modown(struct file *filp, struct pid *pid, enum pid_type type, - uid_t uid, uid_t euid, int force) + int force) { write_lock_irq(&filp->f_owner.lock); if (force || !filp->f_owner.pid) { put_pid(filp->f_owner.pid); filp->f_owner.pid = get_pid(pid); filp->f_owner.pid_type = type; - filp->f_owner.uid = uid; - filp->f_owner.euid = euid; + + if (pid) { + const struct cred *cred = current_cred(); + filp->f_owner.uid = cred->uid; + filp->f_owner.euid = cred->euid; + } } write_unlock_irq(&filp->f_owner.lock); } @@ -214,14 +218,13 @@ static void f_modown(struct file *filp, struct pid *pid, enum pid_type type, int __f_setown(struct file *filp, struct pid *pid, enum pid_type type, int force) { - const struct cred *cred = current_cred(); int err; - + err = security_file_set_fowner(filp); if (err) return err; - f_modown(filp, pid, type, cred->uid, cred->euid, force); + f_modown(filp, pid, type, force); return 0; } EXPORT_SYMBOL(__f_setown); @@ -247,7 +250,7 @@ EXPORT_SYMBOL(f_setown); void f_delown(struct file *filp) { - f_modown(filp, NULL, PIDTYPE_PID, 0, 0, 1); + f_modown(filp, NULL, PIDTYPE_PID, 1); } pid_t f_getown(struct file *filp) |