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.

Link: http://lkml.kernel.org/r/152937734046.21213.9454131988766280028.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
index f53ca4b..633986a 100644 (file)
--- a/fs/autofs/autofs_i.h
+++ b/fs/autofs/autofs_i.h
@@ -153,7 +153,7 @@ 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 5fb47a4..dfb666c 100644 (file)
--- 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 @@ again:
 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 @@ out:
 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);
 }