@@ -2006,7 +2006,7 @@ void touch_atime(const struct path *path)
if (!sb_start_write_trylock(inode->i_sb))
return;
- if (__mnt_want_write(mnt) != 0)
+ if (mnt_get_write_access(mnt) != 0)
goto skip_update;
/*
* File systems can error out when updating inodes if they need to
@@ -2018,7 +2018,7 @@ void touch_atime(const struct path *path)
* of the fs read only, e.g. subvolumes in Btrfs.
*/
inode_update_time(inode, S_ATIME);
- __mnt_drop_write(mnt);
+ mnt_put_write_access(mnt);
skip_update:
sb_end_write(inode->i_sb);
}
@@ -2173,9 +2173,9 @@ static int __file_update_time(struct file *file, int sync_mode)
struct inode *inode = file_inode(file);
/* try to update time settings */
- if (!__mnt_want_write_file(file)) {
+ if (!mnt_get_write_access_file(file)) {
ret = inode_update_time(inode, sync_mode);
- __mnt_drop_write_file(file);
+ mnt_put_write_access_file(file);
}
return ret;
@@ -73,8 +73,8 @@ extern int sb_prepare_remount_readonly(struct super_block *);
extern void __init mnt_init(void);
-extern int __mnt_want_write_file(struct file *);
-extern void __mnt_drop_write_file(struct file *);
+int mnt_get_write_access_file(struct file *file);
+void mnt_put_write_access_file(struct file *file);
extern void dissolve_on_fput(struct vfsmount *);
extern bool may_mount(void);
@@ -101,7 +101,7 @@ static inline void put_file_access(struct file *file)
i_readcount_dec(file->f_inode);
} else if (file->f_mode & FMODE_WRITER) {
put_write_access(file->f_inode);
- __mnt_drop_write(file->f_path.mnt);
+ mnt_put_write_access(file->f_path.mnt);
}
}
@@ -130,9 +130,9 @@ static inline void sb_start_ro_state_change(struct super_block *sb)
* mnt_is_readonly() making sure if mnt_is_readonly() sees SB_RDONLY
* cleared, it will see s_readonly_remount set.
* For RW->RO transition, the barrier pairs with the barrier in
- * __mnt_want_write() before the mnt_is_readonly() check. The barrier
- * makes sure if __mnt_want_write() sees MNT_WRITE_HOLD already
- * cleared, it will see s_readonly_remount set.
+ * mnt_get_write_access() before the mnt_is_readonly() check.
+ * The barrier makes sure if mnt_get_write_access() sees MNT_WRITE_HOLD
+ * already cleared, it will see s_readonly_remount set.
*/
smp_wmb();
}
@@ -330,16 +330,16 @@ static int mnt_is_readonly(struct vfsmount *mnt)
* can determine when writes are able to occur to a filesystem.
*/
/**
- * __mnt_want_write - get write access to a mount without freeze protection
+ * mnt_get_write_access - get write access to a mount without freeze protection
* @m: the mount on which to take a write
*
* This tells the low-level filesystem that a write is about to be performed to
* it, and makes sure that writes are allowed (mnt it read-write) before
* returning success. This operation does not protect against filesystem being
- * frozen. When the write operation is finished, __mnt_drop_write() must be
+ * frozen. When the write operation is finished, mnt_put_write_access() must be
* called. This is effectively a refcount.
*/
-int __mnt_want_write(struct vfsmount *m)
+int mnt_get_write_access(struct vfsmount *m)
{
struct mount *mnt = real_mount(m);
int ret = 0;
@@ -401,7 +401,7 @@ int mnt_want_write(struct vfsmount *m)
int ret;
sb_start_write(m->mnt_sb);
- ret = __mnt_want_write(m);
+ ret = mnt_get_write_access(m);
if (ret)
sb_end_write(m->mnt_sb);
return ret;
@@ -409,15 +409,15 @@ int mnt_want_write(struct vfsmount *m)
EXPORT_SYMBOL_GPL(mnt_want_write);
/**
- * __mnt_want_write_file - get write access to a file's mount
+ * mnt_get_write_access_file - get write access to a file's mount
* @file: the file who's mount on which to take a write
*
- * This is like __mnt_want_write, but if the file is already open for writing it
+ * This is like mnt_get_write_access, but if @file is already open for write it
* skips incrementing mnt_writers (since the open file already has a reference)
* and instead only does the check for emergency r/o remounts. This must be
- * paired with __mnt_drop_write_file.
+ * paired with mnt_put_write_access_file.
*/
-int __mnt_want_write_file(struct file *file)
+int mnt_get_write_access_file(struct file *file)
{
if (file->f_mode & FMODE_WRITER) {
/*
@@ -428,7 +428,7 @@ int __mnt_want_write_file(struct file *file)
return -EROFS;
return 0;
}
- return __mnt_want_write(file->f_path.mnt);
+ return mnt_get_write_access(file->f_path.mnt);
}
/**
@@ -445,7 +445,7 @@ int mnt_want_write_file(struct file *file)
int ret;
sb_start_write(file_inode(file)->i_sb);
- ret = __mnt_want_write_file(file);
+ ret = mnt_get_write_access_file(file);
if (ret)
sb_end_write(file_inode(file)->i_sb);
return ret;
@@ -453,14 +453,14 @@ int mnt_want_write_file(struct file *file)
EXPORT_SYMBOL_GPL(mnt_want_write_file);
/**
- * __mnt_drop_write - give up write access to a mount
+ * mnt_put_write_access - give up write access to a mount
* @mnt: the mount on which to give up write access
*
* Tells the low-level filesystem that we are done
* performing writes to it. Must be matched with
- * __mnt_want_write() call above.
+ * mnt_get_write_access() call above.
*/
-void __mnt_drop_write(struct vfsmount *mnt)
+void mnt_put_write_access(struct vfsmount *mnt)
{
preempt_disable();
mnt_dec_writers(real_mount(mnt));
@@ -477,20 +477,20 @@ void __mnt_drop_write(struct vfsmount *mnt)
*/
void mnt_drop_write(struct vfsmount *mnt)
{
- __mnt_drop_write(mnt);
+ mnt_put_write_access(mnt);
sb_end_write(mnt->mnt_sb);
}
EXPORT_SYMBOL_GPL(mnt_drop_write);
-void __mnt_drop_write_file(struct file *file)
+void mnt_put_write_access_file(struct file *file)
{
if (!(file->f_mode & FMODE_WRITER))
- __mnt_drop_write(file->f_path.mnt);
+ mnt_put_write_access(file->f_path.mnt);
}
void mnt_drop_write_file(struct file *file)
{
- __mnt_drop_write_file(file);
+ mnt_put_write_access_file(file);
sb_end_write(file_inode(file)->i_sb);
}
EXPORT_SYMBOL(mnt_drop_write_file);
@@ -895,7 +895,7 @@ static int do_dentry_open(struct file *f,
error = get_write_access(inode);
if (unlikely(error))
goto cleanup_file;
- error = __mnt_want_write(f->f_path.mnt);
+ error = mnt_get_write_access(f->f_path.mnt);
if (unlikely(error)) {
put_write_access(inode);
goto cleanup_file;
@@ -92,8 +92,8 @@ extern bool __mnt_is_readonly(struct vfsmount *mnt);
extern bool mnt_may_suid(struct vfsmount *mnt);
extern struct vfsmount *clone_private_mount(const struct path *path);
-extern int __mnt_want_write(struct vfsmount *);
-extern void __mnt_drop_write(struct vfsmount *);
+int mnt_get_write_access(struct vfsmount *mnt);
+void mnt_put_write_access(struct vfsmount *mnt);
extern struct vfsmount *fc_mount(struct fs_context *fc);
extern struct vfsmount *vfs_create_mount(struct fs_context *fc);
@@ -246,7 +246,7 @@ static int acct_on(struct filename *pathname)
filp_close(file, NULL);
return PTR_ERR(internal);
}
- err = __mnt_want_write(internal);
+ err = mnt_get_write_access(internal);
if (err) {
mntput(internal);
kfree(acct);
@@ -271,7 +271,7 @@ static int acct_on(struct filename *pathname)
old = xchg(&ns->bacct, &acct->pin);
mutex_unlock(&acct->lock);
pin_kill(old);
- __mnt_drop_write(mnt);
+ mnt_put_write_access(mnt);
mntput(mnt);
return 0;
}
Before exporting these helpers to modules, make their names more meaningful. The names mnt_{get,put)_write_access*() were chosen, because they rhyme with the inode {get,put)_write_access() helpers, which have a very close meaning for the inode object. Suggested-by: Christian Brauner <brauner@kernel.org> Link: https://lore.kernel.org/r/20230817-anfechtbar-ruhelosigkeit-8c6cca8443fc@brauner/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> --- fs/inode.c | 8 ++++---- fs/internal.h | 12 ++++++------ fs/namespace.c | 34 +++++++++++++++++----------------- fs/open.c | 2 +- include/linux/mount.h | 4 ++-- kernel/acct.c | 4 ++-- 6 files changed, 32 insertions(+), 32 deletions(-)