diff options
| -rw-r--r-- | fs/sysfs/file.c | 69 |
1 files changed, 39 insertions, 30 deletions
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c index 2f849e82c0eb..2e24e89bd92b 100644 --- a/fs/sysfs/file.c +++ b/fs/sysfs/file.c @@ -361,7 +361,19 @@ out_free: return len; } -static void sysfs_bin_vma_open(struct vm_area_struct *vma) +static int sysfs_kf_bin_mmap(struct sysfs_open_file *of, + struct vm_area_struct *vma) +{ + struct bin_attribute *battr = of->sd->priv; + struct kobject *kobj = of->sd->s_parent->priv; + + if (!battr->mmap) + return -ENODEV; + + return battr->mmap(of->file, kobj, battr, vma); +} + +static void kernfs_vma_open(struct vm_area_struct *vma) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -378,7 +390,7 @@ static void sysfs_bin_vma_open(struct vm_area_struct *vma) sysfs_put_active(of->sd); } -static int sysfs_bin_fault(struct vm_area_struct *vma, struct vm_fault *vmf) +static int kernfs_vma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -398,8 +410,8 @@ static int sysfs_bin_fault(struct vm_area_struct *vma, struct vm_fault *vmf) return ret; } -static int sysfs_bin_page_mkwrite(struct vm_area_struct *vma, - struct vm_fault *vmf) +static int kernfs_vma_page_mkwrite(struct vm_area_struct *vma, + struct vm_fault *vmf) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -421,8 +433,8 @@ static int sysfs_bin_page_mkwrite(struct vm_area_struct *vma, return ret; } -static int sysfs_bin_access(struct vm_area_struct *vma, unsigned long addr, - void *buf, int len, int write) +static int kernfs_vma_access(struct vm_area_struct *vma, unsigned long addr, + void *buf, int len, int write) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -443,8 +455,8 @@ static int sysfs_bin_access(struct vm_area_struct *vma, unsigned long addr, } #ifdef CONFIG_NUMA -static int sysfs_bin_set_policy(struct vm_area_struct *vma, - struct mempolicy *new) +static int kernfs_vma_set_policy(struct vm_area_struct *vma, + struct mempolicy *new) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -464,8 +476,8 @@ static int sysfs_bin_set_policy(struct vm_area_struct *vma, return ret; } -static struct mempolicy *sysfs_bin_get_policy(struct vm_area_struct *vma, - unsigned long addr) +static struct mempolicy *kernfs_vma_get_policy(struct vm_area_struct *vma, + unsigned long addr) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -485,8 +497,9 @@ static struct mempolicy *sysfs_bin_get_policy(struct vm_area_struct *vma, return pol; } -static int sysfs_bin_migrate(struct vm_area_struct *vma, const nodemask_t *from, - const nodemask_t *to, unsigned long flags) +static int kernfs_vma_migrate(struct vm_area_struct *vma, + const nodemask_t *from, const nodemask_t *to, + unsigned long flags) { struct file *file = vma->vm_file; struct sysfs_open_file *of = sysfs_of(file); @@ -507,36 +520,31 @@ static int sysfs_bin_migrate(struct vm_area_struct *vma, const nodemask_t *from, } #endif -static const struct vm_operations_struct sysfs_bin_vm_ops = { - .open = sysfs_bin_vma_open, - .fault = sysfs_bin_fault, - .page_mkwrite = sysfs_bin_page_mkwrite, - .access = sysfs_bin_access, +static const struct vm_operations_struct kernfs_vm_ops = { + .open = kernfs_vma_open, + .fault = kernfs_vma_fault, + .page_mkwrite = kernfs_vma_page_mkwrite, + .access = kernfs_vma_access, #ifdef CONFIG_NUMA - .set_policy = sysfs_bin_set_policy, - .get_policy = sysfs_bin_get_policy, - .migrate = sysfs_bin_migrate, + .set_policy = kernfs_vma_set_policy, + .get_policy = kernfs_vma_get_policy, + .migrate = kernfs_vma_migrate, #endif }; -static int sysfs_bin_mmap(struct file *file, struct vm_area_struct *vma) +static int kernfs_file_mmap(struct file *file, struct vm_area_struct *vma) { struct sysfs_open_file *of = sysfs_of(file); - struct bin_attribute *battr = of->sd->priv; - struct kobject *kobj = of->sd->s_parent->priv; int rc; mutex_lock(&of->mutex); - /* need of->sd for battr, its parent for kobj */ rc = -ENODEV; if (!sysfs_get_active(of->sd)) goto out_unlock; - if (!battr->mmap) - goto out_put; - - rc = battr->mmap(file, kobj, battr, vma); + if (sysfs_is_bin(of->sd)) + rc = sysfs_kf_bin_mmap(of, vma); if (rc) goto out_put; @@ -563,7 +571,7 @@ static int sysfs_bin_mmap(struct file *file, struct vm_area_struct *vma) rc = 0; of->mmapped = 1; of->vm_ops = vma->vm_ops; - vma->vm_ops = &sysfs_bin_vm_ops; + vma->vm_ops = &kernfs_vm_ops; out_put: sysfs_put_active(of->sd); out_unlock: @@ -877,6 +885,7 @@ const struct file_operations sysfs_file_operations = { .read = kernfs_file_read, .write = kernfs_file_write, .llseek = generic_file_llseek, + .mmap = kernfs_file_mmap, .open = sysfs_open_file, .release = sysfs_release, .poll = sysfs_poll, @@ -886,7 +895,7 @@ const struct file_operations sysfs_bin_operations = { .read = kernfs_file_read, .write = kernfs_file_write, .llseek = generic_file_llseek, - .mmap = sysfs_bin_mmap, + .mmap = kernfs_file_mmap, .open = sysfs_open_file, .release = sysfs_release, .poll = sysfs_poll, |