From: Pavel Emelianov Date: Fri, 19 Oct 2007 06:39:46 +0000 (-0700) Subject: pid namespaces: round up the API X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a47afb0f9d794d525a372c8d69902147cc88222a;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git pid namespaces: round up the API The set of functions process_session, task_session, process_group and task_pgrp is confusing, as the names can be mixed with each other when looking at the code for a long time. The proposals are to * equip the functions that return the integer with _nr suffix to represent that fact, * and to make all functions work with task (not process) by making the common prefix of the same name. For monotony the routines signal_session() and set_signal_session() are replaced with task_session_nr() and set_task_session(), especially since they are only used with the explicit task->signal dereference. Signed-off-by: Pavel Emelianov Acked-by: Serge E. Hallyn Cc: Kirill Korotaev Cc: "Eric W. Biederman" Cc: Cedric Le Goater Cc: Herbert Poetzl Cc: Sukadev Bhattiprolu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c index b997af713eb3..7852c7cdf29e 100644 --- a/arch/mips/kernel/irixelf.c +++ b/arch/mips/kernel/irixelf.c @@ -1172,8 +1172,8 @@ static int irix_core_dump(long signr, struct pt_regs *regs, struct file *file, u prstatus.pr_sighold = current->blocked.sig[0]; psinfo.pr_pid = prstatus.pr_pid = current->pid; psinfo.pr_ppid = prstatus.pr_ppid = current->parent->pid; - psinfo.pr_pgrp = prstatus.pr_pgrp = process_group(current); - psinfo.pr_sid = prstatus.pr_sid = process_session(current); + psinfo.pr_pgrp = prstatus.pr_pgrp = task_pgrp_nr(current); + psinfo.pr_sid = prstatus.pr_sid = task_session_nr(current); if (current->pid == current->tgid) { /* * This is the record for the group leader. Add in the diff --git a/arch/mips/kernel/irixsig.c b/arch/mips/kernel/irixsig.c index 85c2e389edd6..a0a91056fda7 100644 --- a/arch/mips/kernel/irixsig.c +++ b/arch/mips/kernel/irixsig.c @@ -609,7 +609,7 @@ repeat: p = list_entry(_p, struct task_struct, sibling); if ((type == IRIX_P_PID) && p->pid != pid) continue; - if ((type == IRIX_P_PGID) && process_group(p) != pid) + if ((type == IRIX_P_PGID) && task_pgrp_nr(p) != pid) continue; if ((p->exit_signal != SIGCHLD)) continue; diff --git a/arch/mips/kernel/sysirix.c b/arch/mips/kernel/sysirix.c index ee7790d9debe..4c477c7ff74a 100644 --- a/arch/mips/kernel/sysirix.c +++ b/arch/mips/kernel/sysirix.c @@ -763,11 +763,11 @@ asmlinkage int irix_setpgrp(int flags) printk("[%s:%d] setpgrp(%d) ", current->comm, current->pid, flags); #endif if(!flags) - error = process_group(current); + error = task_pgrp_nr(current); else error = sys_setsid(); #ifdef DEBUG_PROCGRPS - printk("returning %d\n", process_group(current)); + printk("returning %d\n", task_pgrp_nr(current)); #endif return error; diff --git a/arch/sparc64/solaris/misc.c b/arch/sparc64/solaris/misc.c index 3b67de7455f1..c86cb3091a8e 100644 --- a/arch/sparc64/solaris/misc.c +++ b/arch/sparc64/solaris/misc.c @@ -415,7 +415,7 @@ asmlinkage int solaris_procids(int cmd, s32 pid, s32 pgid) switch (cmd) { case 0: /* getpgrp */ - return process_group(current); + return task_pgrp_nr(current); case 1: /* setpgrp */ { int (*sys_setpgid)(pid_t,pid_t) = @@ -426,7 +426,7 @@ asmlinkage int solaris_procids(int cmd, s32 pid, s32 pgid) ret = sys_setpgid(0, 0); if (ret) return ret; proc_clear_tty(current); - return process_group(current); + return task_pgrp_nr(current); } case 2: /* getsid */ { diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 9c867cf6de64..9820f86831ee 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -3528,7 +3528,7 @@ void __do_SAK(struct tty_struct *tty) /* Kill the entire session */ do_each_pid_task(session, PIDTYPE_SID, p) { printk(KERN_NOTICE "SAK: killed process %d" - " (%s): process_session(p)==tty->session\n", + " (%s): task_session_nr(p)==tty->session\n", p->pid, p->comm); send_sig(SIGKILL, p, 1); } while_each_pid_task(session, PIDTYPE_SID, p); @@ -3538,7 +3538,7 @@ void __do_SAK(struct tty_struct *tty) do_each_thread(g, p) { if (p->signal->tty == tty) { printk(KERN_NOTICE "SAK: killed process %d" - " (%s): process_session(p)==tty->session\n", + " (%s): task_session_nr(p)==tty->session\n", p->pid, p->comm); send_sig(SIGKILL, p, 1); continue; diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c index e7204d71acc9..45f5992a0957 100644 --- a/fs/autofs/inode.c +++ b/fs/autofs/inode.c @@ -80,7 +80,7 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, *uid = current->uid; *gid = current->gid; - *pgrp = process_group(current); + *pgrp = task_pgrp_nr(current); *minproto = *maxproto = AUTOFS_PROTO_VERSION; diff --git a/fs/autofs/root.c b/fs/autofs/root.c index c1489533277a..592f64037ae2 100644 --- a/fs/autofs/root.c +++ b/fs/autofs/root.c @@ -215,7 +215,7 @@ static struct dentry *autofs_root_lookup(struct inode *dir, struct dentry *dentr oz_mode = autofs_oz_mode(sbi); DPRINTK(("autofs_lookup: pid = %u, pgrp = %u, catatonic = %d, " "oz_mode = %d\n", pid_nr(task_pid(current)), - process_group(current), sbi->catatonic, + task_pgrp_nr(current), sbi->catatonic, oz_mode)); /* @@ -536,7 +536,7 @@ static int autofs_root_ioctl(struct inode *inode, struct file *filp, struct autofs_sb_info *sbi = autofs_sbi(inode->i_sb); void __user *argp = (void __user *)arg; - DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,process_group(current))); + DPRINTK(("autofs_ioctl: cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u\n",cmd,arg,sbi,task_pgrp_nr(current))); if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) || _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT) diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index d85f42fa9206..2d4ae40718d9 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -131,7 +131,7 @@ static inline struct autofs_info *autofs4_dentry_ino(struct dentry *dentry) filesystem without "magic".) */ static inline int autofs4_oz_mode(struct autofs_sb_info *sbi) { - return sbi->catatonic || process_group(current) == sbi->oz_pgrp; + return sbi->catatonic || task_pgrp_nr(current) == sbi->oz_pgrp; } /* Does a dentry have some pending activity? */ diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index cd81f0836671..7f05d6ccdb13 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -226,7 +226,7 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid, *uid = current->uid; *gid = current->gid; - *pgrp = process_group(current); + *pgrp = task_pgrp_nr(current); *minproto = AUTOFS_MIN_PROTO_VERSION; *maxproto = AUTOFS_MAX_PROTO_VERSION; @@ -323,7 +323,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent) sbi->pipe = NULL; sbi->catatonic = 1; sbi->exp_timeout = 0; - sbi->oz_pgrp = process_group(current); + sbi->oz_pgrp = task_pgrp_nr(current); sbi->sb = s; sbi->version = 0; sbi->sub_version = 0; diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index 45ff3d63b758..2bbcc8151dc3 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -582,7 +582,7 @@ static struct dentry *autofs4_lookup(struct inode *dir, struct dentry *dentry, s oz_mode = autofs4_oz_mode(sbi); DPRINTK("pid = %u, pgrp = %u, catatonic = %d, oz_mode = %d", - current->pid, process_group(current), sbi->catatonic, oz_mode); + current->pid, task_pgrp_nr(current), sbi->catatonic, oz_mode); unhashed = autofs4_lookup_unhashed(sbi, dentry->d_parent, &dentry->d_name); if (!unhashed) { @@ -976,7 +976,7 @@ static int autofs4_root_ioctl(struct inode *inode, struct file *filp, void __user *p = (void __user *)arg; DPRINTK("cmd = 0x%08x, arg = 0x%08lx, sbi = %p, pgrp = %u", - cmd,arg,sbi,process_group(current)); + cmd,arg,sbi,task_pgrp_nr(current)); if (_IOC_TYPE(cmd) != _IOC_TYPE(AUTOFS_IOC_FIRST) || _IOC_NR(cmd) - _IOC_NR(AUTOFS_IOC_FIRST) >= AUTOFS_IOC_COUNT) diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 6e2f3b8dde7f..9ea2b99dc31a 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1385,8 +1385,8 @@ static void fill_prstatus(struct elf_prstatus *prstatus, prstatus->pr_sighold = p->blocked.sig[0]; prstatus->pr_pid = p->pid; prstatus->pr_ppid = p->parent->pid; - prstatus->pr_pgrp = process_group(p); - prstatus->pr_sid = process_session(p); + prstatus->pr_pgrp = task_pgrp_nr(p); + prstatus->pr_sid = task_session_nr(p); if (thread_group_leader(p)) { /* * This is the record for the group leader. Add in the @@ -1431,8 +1431,8 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p, psinfo->pr_pid = p->pid; psinfo->pr_ppid = p->parent->pid; - psinfo->pr_pgrp = process_group(p); - psinfo->pr_sid = process_session(p); + psinfo->pr_pgrp = task_pgrp_nr(p); + psinfo->pr_sid = task_session_nr(p); i = p->state ? ffz(~p->state) + 1 : 0; psinfo->pr_state = i; diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c index 033861c6b8f1..b8b4e93f6f62 100644 --- a/fs/binfmt_elf_fdpic.c +++ b/fs/binfmt_elf_fdpic.c @@ -1344,8 +1344,8 @@ static void fill_prstatus(struct elf_prstatus *prstatus, prstatus->pr_sighold = p->blocked.sig[0]; prstatus->pr_pid = p->pid; prstatus->pr_ppid = p->parent->pid; - prstatus->pr_pgrp = process_group(p); - prstatus->pr_sid = process_session(p); + prstatus->pr_pgrp = task_pgrp_nr(p); + prstatus->pr_sid = task_session_nr(p); if (thread_group_leader(p)) { /* * This is the record for the group leader. Add in the @@ -1393,8 +1393,8 @@ static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p, psinfo->pr_pid = p->pid; psinfo->pr_ppid = p->parent->pid; - psinfo->pr_pgrp = process_group(p); - psinfo->pr_sid = process_session(p); + psinfo->pr_pgrp = task_pgrp_nr(p); + psinfo->pr_sid = task_session_nr(p); i = p->state ? ffz(~p->state) + 1 : 0; psinfo->pr_state = i; diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c index cdb4c07a7870..359e531094dd 100644 --- a/fs/coda/upcall.c +++ b/fs/coda/upcall.c @@ -51,7 +51,7 @@ static void *alloc_upcall(int opcode, int size) inp->ih.opcode = opcode; inp->ih.pid = current->pid; - inp->ih.pgid = process_group(current); + inp->ih.pgid = task_pgrp_nr(current); #ifdef CONFIG_CODA_FS_OLD_API memset(&inp->ih.cred, 0, sizeof(struct coda_cred)); inp->ih.cred.cr_fsuid = current->fsuid; diff --git a/fs/proc/array.c b/fs/proc/array.c index 27b59f5f3bd1..24f7f9f6684d 100644 --- a/fs/proc/array.c +++ b/fs/proc/array.c @@ -449,8 +449,8 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole) gtime += cputime_add(gtime, sig->gtime); } - sid = signal_session(sig); - pgid = process_group(task); + sid = task_session_nr(task); + pgid = task_pgrp_nr(task); ppid = rcu_dereference(task->real_parent)->tgid; unlock_task_sighand(task, &flags); diff --git a/include/linux/sched.h b/include/linux/sched.h index 93a55f2e5ef6..df6049e5e8bf 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1188,24 +1188,19 @@ static inline int rt_task(struct task_struct *p) return rt_prio(p->prio); } -static inline pid_t process_group(struct task_struct *tsk) +static inline pid_t task_pgrp_nr(struct task_struct *tsk) { return tsk->signal->pgrp; } -static inline pid_t signal_session(struct signal_struct *sig) +static inline pid_t task_session_nr(struct task_struct *tsk) { - return sig->__session; + return tsk->signal->__session; } -static inline pid_t process_session(struct task_struct *tsk) +static inline void set_task_session(struct task_struct *tsk, pid_t session) { - return signal_session(tsk->signal); -} - -static inline void set_signal_session(struct signal_struct *sig, pid_t session) -{ - sig->__session = session; + tsk->signal->__session = session; } static inline struct pid *task_pid(struct task_struct *task) diff --git a/kernel/exit.c b/kernel/exit.c index cf03a52c3a9a..6e6ec300330f 100644 --- a/kernel/exit.c +++ b/kernel/exit.c @@ -299,12 +299,12 @@ void __set_special_pids(pid_t session, pid_t pgrp) { struct task_struct *curr = current->group_leader; - if (process_session(curr) != session) { + if (task_session_nr(curr) != session) { detach_pid(curr, PIDTYPE_SID); - set_signal_session(curr->signal, session); + set_task_session(curr, session); attach_pid(curr, PIDTYPE_SID, find_pid(session)); } - if (process_group(curr) != pgrp) { + if (task_pgrp_nr(curr) != pgrp) { detach_pid(curr, PIDTYPE_PGID); curr->signal->pgrp = pgrp; attach_pid(curr, PIDTYPE_PGID, find_pid(pgrp)); @@ -1091,10 +1091,10 @@ static int eligible_child(pid_t pid, int options, struct task_struct *p) if (p->pid != pid) return 0; } else if (!pid) { - if (process_group(p) != process_group(current)) + if (task_pgrp_nr(p) != task_pgrp_nr(current)) return 0; } else if (pid != -1) { - if (process_group(p) != -pid) + if (task_pgrp_nr(p) != -pid) return 0; } diff --git a/kernel/fork.c b/kernel/fork.c index 61516b89cb6c..fd65bca38a93 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1283,8 +1283,8 @@ static struct task_struct *copy_process(unsigned long clone_flags, if (thread_group_leader(p)) { p->signal->tty = current->signal->tty; - p->signal->pgrp = process_group(current); - set_signal_session(p->signal, process_session(current)); + p->signal->pgrp = task_pgrp_nr(current); + set_task_session(p, task_session_nr(current)); attach_pid(p, PIDTYPE_PGID, task_pgrp(current)); attach_pid(p, PIDTYPE_SID, task_session(current)); diff --git a/kernel/signal.c b/kernel/signal.c index e4f059cd9867..15c6940ab046 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -536,7 +536,7 @@ static int check_kill_permission(int sig, struct siginfo *info, return error; error = -EPERM; if (((sig != SIGCONT) || - (process_session(current) != process_session(t))) + (task_session_nr(current) != task_session_nr(t))) && (current->euid ^ t->suid) && (current->euid ^ t->uid) && (current->uid ^ t->suid) && (current->uid ^ t->uid) && !capable(CAP_KILL)) diff --git a/kernel/sys.c b/kernel/sys.c index b8fcbc640193..4cfa213a5ac2 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -968,7 +968,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid) if (err) goto out; - if (process_group(p) != pgid) { + if (task_pgrp_nr(p) != pgid) { detach_pid(p, PIDTYPE_PGID); p->signal->pgrp = pgid; attach_pid(p, PIDTYPE_PGID, find_pid(pgid)); @@ -984,7 +984,7 @@ out: asmlinkage long sys_getpgid(pid_t pid) { if (!pid) - return process_group(current); + return task_pgrp_nr(current); else { int retval; struct task_struct *p; @@ -996,7 +996,7 @@ asmlinkage long sys_getpgid(pid_t pid) if (p) { retval = security_task_getpgid(p); if (!retval) - retval = process_group(p); + retval = task_pgrp_nr(p); } read_unlock(&tasklist_lock); return retval; @@ -1008,7 +1008,7 @@ asmlinkage long sys_getpgid(pid_t pid) asmlinkage long sys_getpgrp(void) { /* SMP - assuming writes are word atomic this is fine */ - return process_group(current); + return task_pgrp_nr(current); } #endif @@ -1016,7 +1016,7 @@ asmlinkage long sys_getpgrp(void) asmlinkage long sys_getsid(pid_t pid) { if (!pid) - return process_session(current); + return task_session_nr(current); else { int retval; struct task_struct *p; @@ -1028,7 +1028,7 @@ asmlinkage long sys_getsid(pid_t pid) if (p) { retval = security_task_getsid(p); if (!retval) - retval = process_session(p); + retval = task_session_nr(p); } read_unlock(&tasklist_lock); return retval; @@ -1065,7 +1065,7 @@ asmlinkage long sys_setsid(void) group_leader->signal->tty = NULL; spin_unlock(&group_leader->sighand->siglock); - err = process_group(group_leader); + err = task_pgrp_nr(group_leader); out: write_unlock_irq(&tasklist_lock); return err;