| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Tue, 19 Jun 2018 11:02:20 +0800
From: Ian Kent <raven@...maw.net>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-fsdevel <linux-fsdevel@...r.kernel.org>,
autofs mailing list <autofs@...r.kernel.org>,
Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 5/6] autofs - make expire flags usage consistent with v5
params
Make the usage of the expire flags consistent by naming
the expire flags the same as it is named in the version
5 miscelaneous ioctl parameters and only check the bit
flags when needed.
Signed-off-by: Ian Kent <raven@...maw.net>
---
fs/autofs/autofs_i.h | 2 +-
fs/autofs/expire.c | 61 +++++++++++++++++++++++---------------------------
2 files changed, 29 insertions(+), 34 deletions(-)
diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
index b1f70bc45ca3..b5e0870acdcb 100644
--- a/fs/autofs/autofs_i.h
+++ b/fs/autofs/autofs_i.h
@@ -151,7 +151,7 @@ int autofs_expire_run(struct super_block *, struct vfsmount *,
struct autofs_sb_info *,
struct autofs_packet_expire __user *);
int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
- struct autofs_sb_info *sbi, int when);
+ struct autofs_sb_info *sbi, unsigned int how);
int autofs_expire_multi(struct super_block *, struct vfsmount *,
struct autofs_sb_info *, int __user *);
diff --git a/fs/autofs/expire.c b/fs/autofs/expire.c
index 5fb47a4ca48c..dfb666c5b8a2 100644
--- a/fs/autofs/expire.c
+++ b/fs/autofs/expire.c
@@ -12,7 +12,7 @@
/* Check if a dentry can be expired */
static inline int autofs_can_expire(struct dentry *dentry,
- unsigned long timeout, int do_now)
+ unsigned long timeout, unsigned int how)
{
struct autofs_info *ino = autofs_dentry_ino(dentry);
@@ -20,7 +20,7 @@ static inline int autofs_can_expire(struct dentry *dentry,
if (ino == NULL)
return 0;
- if (!do_now) {
+ if (!(how & AUTOFS_EXP_IMMEDIATE)) {
/* Too young to die */
if (!timeout || time_after(ino->last_used + timeout, jiffies))
return 0;
@@ -185,7 +185,7 @@ static struct dentry *get_next_positive_dentry(struct dentry *prev,
static int autofs_direct_busy(struct vfsmount *mnt,
struct dentry *top,
unsigned long timeout,
- int do_now)
+ unsigned int how)
{
pr_debug("top %p %pd\n", top, top);
@@ -200,7 +200,7 @@ static int autofs_direct_busy(struct vfsmount *mnt,
}
/* Timeout of a direct mount is determined by its top dentry */
- if (!autofs_can_expire(top, timeout, do_now))
+ if (!autofs_can_expire(top, timeout, how))
return 1;
return 0;
@@ -213,7 +213,7 @@ static int autofs_direct_busy(struct vfsmount *mnt,
static int autofs_tree_busy(struct vfsmount *mnt,
struct dentry *top,
unsigned long timeout,
- int do_now)
+ unsigned int how)
{
struct autofs_info *top_ino = autofs_dentry_ino(top);
struct dentry *p;
@@ -259,7 +259,7 @@ static int autofs_tree_busy(struct vfsmount *mnt,
}
/* Timeout of a tree mount is ultimately determined by its top dentry */
- if (!autofs_can_expire(top, timeout, do_now))
+ if (!autofs_can_expire(top, timeout, how))
return 1;
return 0;
@@ -268,7 +268,7 @@ static int autofs_tree_busy(struct vfsmount *mnt,
static struct dentry *autofs_check_leaves(struct vfsmount *mnt,
struct dentry *parent,
unsigned long timeout,
- int do_now)
+ unsigned int how)
{
struct dentry *p;
@@ -284,7 +284,7 @@ static struct dentry *autofs_check_leaves(struct vfsmount *mnt,
continue;
/* Can we expire this guy */
- if (autofs_can_expire(p, timeout, do_now))
+ if (autofs_can_expire(p, timeout, how))
return p;
}
}
@@ -295,19 +295,18 @@ static struct dentry *autofs_check_leaves(struct vfsmount *mnt,
static struct dentry *autofs_expire_direct(struct super_block *sb,
struct vfsmount *mnt,
struct autofs_sb_info *sbi,
- int how)
+ unsigned int how)
{
- unsigned long timeout;
struct dentry *root = dget(sb->s_root);
- int do_now = how & AUTOFS_EXP_IMMEDIATE;
struct autofs_info *ino;
+ unsigned long timeout;
if (!root)
return NULL;
timeout = sbi->exp_timeout;
- if (!autofs_direct_busy(mnt, root, timeout, do_now)) {
+ if (!autofs_direct_busy(mnt, root, timeout, how)) {
spin_lock(&sbi->fs_lock);
ino = autofs_dentry_ino(root);
/* No point expiring a pending mount */
@@ -318,7 +317,7 @@ static struct dentry *autofs_expire_direct(struct super_block *sb,
ino->flags |= AUTOFS_INF_WANT_EXPIRE;
spin_unlock(&sbi->fs_lock);
synchronize_rcu();
- if (!autofs_direct_busy(mnt, root, timeout, do_now)) {
+ if (!autofs_direct_busy(mnt, root, timeout, how)) {
spin_lock(&sbi->fs_lock);
ino->flags |= AUTOFS_INF_EXPIRING;
init_completion(&ino->expire_complete);
@@ -343,10 +342,8 @@ static struct dentry *autofs_expire_direct(struct super_block *sb,
static struct dentry *should_expire(struct dentry *dentry,
struct vfsmount *mnt,
unsigned long timeout,
- int how)
+ unsigned int how)
{
- int do_now = how & AUTOFS_EXP_IMMEDIATE;
- int exp_leaves = how & AUTOFS_EXP_LEAVES;
struct autofs_info *ino = autofs_dentry_ino(dentry);
unsigned int ino_count;
@@ -368,7 +365,7 @@ static struct dentry *should_expire(struct dentry *dentry,
return NULL;
/* Can we expire this guy */
- if (autofs_can_expire(dentry, timeout, do_now))
+ if (autofs_can_expire(dentry, timeout, how))
return dentry;
return NULL;
}
@@ -379,7 +376,7 @@ static struct dentry *should_expire(struct dentry *dentry,
* A symlink can't be "busy" in the usual sense so
* just check last used for expire timeout.
*/
- if (autofs_can_expire(dentry, timeout, do_now))
+ if (autofs_can_expire(dentry, timeout, how))
return dentry;
return NULL;
}
@@ -388,13 +385,13 @@ static struct dentry *should_expire(struct dentry *dentry,
return NULL;
/* Case 2: tree mount, expire iff entire tree is not busy */
- if (!exp_leaves) {
+ if (!(how & AUTOFS_EXP_LEAVES)) {
/* Path walk currently on this dentry? */
ino_count = atomic_read(&ino->count) + 1;
if (d_count(dentry) > ino_count)
return NULL;
- if (!autofs_tree_busy(mnt, dentry, timeout, do_now))
+ if (!autofs_tree_busy(mnt, dentry, timeout, how))
return dentry;
/*
* Case 3: pseudo direct mount, expire individual leaves
@@ -408,7 +405,7 @@ static struct dentry *should_expire(struct dentry *dentry,
if (d_count(dentry) > ino_count)
return NULL;
- expired = autofs_check_leaves(mnt, dentry, timeout, do_now);
+ expired = autofs_check_leaves(mnt, dentry, timeout, how);
if (expired) {
if (expired == dentry)
dput(dentry);
@@ -427,7 +424,7 @@ static struct dentry *should_expire(struct dentry *dentry,
static struct dentry *autofs_expire_indirect(struct super_block *sb,
struct vfsmount *mnt,
struct autofs_sb_info *sbi,
- int how)
+ unsigned int how)
{
unsigned long timeout;
struct dentry *root = sb->s_root;
@@ -443,8 +440,6 @@ static struct dentry *autofs_expire_indirect(struct super_block *sb,
dentry = NULL;
while ((dentry = get_next_positive_subdir(dentry, root))) {
- int flags = how;
-
spin_lock(&sbi->fs_lock);
ino = autofs_dentry_ino(dentry);
if (ino->flags & AUTOFS_INF_WANT_EXPIRE) {
@@ -453,7 +448,7 @@ static struct dentry *autofs_expire_indirect(struct super_block *sb,
}
spin_unlock(&sbi->fs_lock);
- expired = should_expire(dentry, mnt, timeout, flags);
+ expired = should_expire(dentry, mnt, timeout, how);
if (!expired)
continue;
@@ -466,8 +461,8 @@ static struct dentry *autofs_expire_indirect(struct super_block *sb,
/* Make sure a reference is not taken on found if
* things have changed.
*/
- flags &= ~AUTOFS_EXP_LEAVES;
- found = should_expire(expired, mnt, timeout, flags);
+ how &= ~AUTOFS_EXP_LEAVES;
+ found = should_expire(expired, mnt, timeout, how);
if (!found || found != expired)
/* Something has changed, continue */
goto next;
@@ -580,15 +575,15 @@ int autofs_expire_run(struct super_block *sb,
}
int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
- struct autofs_sb_info *sbi, int when)
+ struct autofs_sb_info *sbi, unsigned int how)
{
struct dentry *dentry;
int ret = -EAGAIN;
if (autofs_type_trigger(sbi->type))
- dentry = autofs_expire_direct(sb, mnt, sbi, when);
+ dentry = autofs_expire_direct(sb, mnt, sbi, how);
else
- dentry = autofs_expire_indirect(sb, mnt, sbi, when);
+ dentry = autofs_expire_indirect(sb, mnt, sbi, how);
if (dentry) {
struct autofs_info *ino = autofs_dentry_ino(dentry);
@@ -618,10 +613,10 @@ int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
int autofs_expire_multi(struct super_block *sb, struct vfsmount *mnt,
struct autofs_sb_info *sbi, int __user *arg)
{
- int do_now = 0;
+ unsigned int how = 0;
- if (arg && get_user(do_now, arg))
+ if (arg && get_user(how, arg))
return -EFAULT;
- return autofs_do_expire_multi(sb, mnt, sbi, do_now);
+ return autofs_do_expire_multi(sb, mnt, sbi, how);
}
Powered by blists - more mailing lists