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[PATCH] autofs4: expire code readability cleanup

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Change the names of the boolean functions autofs4_check_mount and
autofs4_check_tree to autofs4_mount_busy and autofs4_tree_busy respectively
and alters their return codes to suit in order to aid code readabilty.

A couple of white space cleanups are included as well.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ian Kent 2006-03-27 01:14:44 -08:00 committed by Linus Torvalds
parent 2d753e62b8
commit 1f5f2c3059
1 changed files with 26 additions and 28 deletions
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54
fs/autofs4/expire.c
View File

@ -16,7 +16,7 @@
static unsigned long now;
/* Check if a dentry can be expired return 1 if it can else return 0 */
/* Check if a dentry can be expired */
static inline int autofs4_can_expire(struct dentry *dentry,
unsigned long timeout, int do_now)
{
@ -41,14 +41,13 @@ static inline int autofs4_can_expire(struct dentry *dentry,
attempts if expire fails the first time */
ino->last_used = now;
}
return 1;
}
/* Check a mount point for busyness return 1 if not busy, otherwise */
static int autofs4_check_mount(struct vfsmount *mnt, struct dentry *dentry)
/* Check a mount point for busyness */
static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry)
{
int status = 0;
int status = 1;
DPRINTK("dentry %p %.*s",
dentry, (int)dentry->d_name.len, dentry->d_name.name);
@ -65,7 +64,7 @@ static int autofs4_check_mount(struct vfsmount *mnt, struct dentry *dentry)
/* The big question */
if (may_umount_tree(mnt) == 0)
status = 1;
status = 0;
done:
DPRINTK("returning = %d", status);
mntput(mnt);
@ -75,30 +74,29 @@ done:
/* Check a directory tree of mount points for busyness
* The tree is not busy iff no mountpoints are busy
* Return 1 if the tree is busy or 0 otherwise
*/
static int autofs4_check_tree(struct vfsmount *mnt,
struct dentry *top,
unsigned long timeout,
int do_now)
static int autofs4_tree_busy(struct vfsmount *mnt,
struct dentry *top,
unsigned long timeout,
int do_now)
{
struct dentry *this_parent = top;
struct list_head *next;
DPRINTK("parent %p %.*s",
DPRINTK("top %p %.*s",
top, (int)top->d_name.len, top->d_name.name);
/* Negative dentry - give up */
if (!simple_positive(top))
return 0;
return 1;
/* Timeout of a tree mount is determined by its top dentry */
if (!autofs4_can_expire(top, timeout, do_now))
return 0;
return 1;
/* Is someone visiting anywhere in the tree ? */
if (may_umount_tree(mnt))
return 0;
return 1;
spin_lock(&dcache_lock);
repeat:
@ -126,9 +124,9 @@ resume:
if (d_mountpoint(dentry)) {
/* First busy => tree busy */
if (!autofs4_check_mount(mnt, dentry)) {
if (autofs4_mount_busy(mnt, dentry)) {
dput(dentry);
return 0;
return 1;
}
}
@ -144,7 +142,7 @@ resume:
}
spin_unlock(&dcache_lock);
return 1;
return 0;
}
static struct dentry *autofs4_check_leaves(struct vfsmount *mnt,
@ -188,7 +186,7 @@ resume:
goto cont;
/* Can we umount this guy */
if (autofs4_check_mount(mnt, dentry))
if (!autofs4_mount_busy(mnt, dentry))
return dentry;
}
@ -241,7 +239,7 @@ static struct dentry *autofs4_expire(struct super_block *sb,
struct dentry *dentry = list_entry(next, struct dentry, d_u.d_child);
/* Negative dentry - give up */
if ( !simple_positive(dentry) ) {
if (!simple_positive(dentry)) {
next = next->next;
continue;
}
@ -259,21 +257,21 @@ static struct dentry *autofs4_expire(struct super_block *sb,
goto next;
/* Can we umount this guy */
if (autofs4_check_mount(mnt, dentry)) {
if (!autofs4_mount_busy(mnt, dentry)) {
expired = dentry;
break;
}
goto next;
}
if ( simple_empty(dentry) )
if (simple_empty(dentry))
goto next;
/* Case 2: tree mount, expire iff entire tree is not busy */
if (!exp_leaves) {
/* Lock the tree as we must expire as a whole */
spin_lock(&sbi->fs_lock);
if (autofs4_check_tree(mnt, dentry, timeout, do_now)) {
if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) {
struct autofs_info *inf = autofs4_dentry_ino(dentry);
/* Set this flag early to catch sys_chdir and the like */
@ -297,7 +295,7 @@ next:
next = next->next;
}
if ( expired ) {
if (expired) {
DPRINTK("returning %p %.*s",
expired, (int)expired->d_name.len, expired->d_name.name);
spin_lock(&dcache_lock);
@ -352,16 +350,16 @@ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt,
return -EFAULT;
if ((dentry = autofs4_expire(sb, mnt, sbi, do_now)) != NULL) {
struct autofs_info *de_info = autofs4_dentry_ino(dentry);
struct autofs_info *ino = autofs4_dentry_ino(dentry);
/* This is synchronous because it makes the daemon a
little easier */
de_info->flags |= AUTOFS_INF_EXPIRING;
ino->flags |= AUTOFS_INF_EXPIRING;
ret = autofs4_wait(sbi, dentry, NFY_EXPIRE);
de_info->flags &= ~AUTOFS_INF_EXPIRING;
ino->flags &= ~AUTOFS_INF_EXPIRING;
dput(dentry);
}
return ret;
}