diff options
Diffstat (limited to 'fs/autofs4')
| -rw-r--r-- | fs/autofs4/autofs_i.h | 13 | ||||
| -rw-r--r-- | fs/autofs4/expire.c | 5 | ||||
| -rw-r--r-- | fs/autofs4/root.c | 15 | ||||
| -rw-r--r-- | fs/autofs4/waitq.c | 7 |
4 files changed, 34 insertions, 6 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index c7b2b8890188..9c09641ce907 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -185,6 +185,19 @@ int autofs4_wait(struct autofs_sb_info *,struct dentry *, enum autofs_notify); int autofs4_wait_release(struct autofs_sb_info *,autofs_wqt_t,int); void autofs4_catatonic_mode(struct autofs_sb_info *); +static inline int autofs4_follow_mount(struct vfsmount **mnt, struct dentry **dentry) +{ + int res = 0; + + while (d_mountpoint(*dentry)) { + int followed = follow_down(mnt, dentry); + if (!followed) + break; + res = 1; + } + return res; +} + static inline int simple_positive(struct dentry *dentry) { return dentry->d_inode && !d_unhashed(dentry); diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index 500425e24fba..feb6ac427d05 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -56,12 +56,9 @@ static int autofs4_check_mount(struct vfsmount *mnt, struct dentry *dentry) mntget(mnt); dget(dentry); - if (!follow_down(&mnt, &dentry)) + if (!autofs4_follow_mount(&mnt, &dentry)) goto done; - while (d_mountpoint(dentry) && follow_down(&mnt, &dentry)) - ; - /* This is an autofs submount, we can't expire it */ if (is_autofs4_dentry(dentry)) goto done; diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index 3765c047f157..2a771ec66956 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -205,7 +205,11 @@ static int autofs4_dir_open(struct inode *inode, struct file *file) struct vfsmount *fp_mnt = mntget(mnt); struct dentry *fp_dentry = dget(dentry); - while (follow_down(&fp_mnt, &fp_dentry) && d_mountpoint(fp_dentry)); + if (!autofs4_follow_mount(&fp_mnt, &fp_dentry)) { + dput(fp_dentry); + mntput(fp_mnt); + return -ENOENT; + } fp = dentry_open(fp_dentry, fp_mnt, file->f_flags); status = PTR_ERR(fp); @@ -302,7 +306,14 @@ static int try_to_fill_dentry(struct dentry *dentry, DPRINTK("expire done status=%d", status); - return 0; + /* + * If the directory still exists the mount request must + * continue otherwise it can't be followed at the right + * time during the walk. + */ + status = d_invalidate(dentry); + if (status != -EBUSY) + return 0; } DPRINTK("dentry=%p %.*s ino=%p", diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 5a40d36e5a51..fa2348dcd671 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -191,6 +191,13 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, } if ( !wq ) { + /* Can't wait for an expire if there's no mount */ + if (notify == NFY_NONE && !d_mountpoint(dentry)) { + kfree(name); + up(&sbi->wq_sem); + return -ENOENT; + } + /* Create a new wait queue */ wq = kmalloc(sizeof(struct autofs_wait_queue),GFP_KERNEL); if ( !wq ) { |