ramfs: replace inode uid,gid,mode initialization with helper function

- seems what ramfs_get_inode is only locally, make it static.
[AV: the hell it is; it's used by shmem, so shmem needed conversion too
and no, that function can't be made static]

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index f47cd212dee13000550ffccef05c5ac59d2b1a6c..a5ebae70dc6d4c90213770630f185d56ec6d6009 100644 (file)
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -52,14 +52,13 @@ static struct backing_dev_info ramfs_backing_dev_info = {
                          BDI_CAP_READ_MAP | BDI_CAP_WRITE_MAP | BDI_CAP_EXEC_MAP,
 };
 
-struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
+struct inode *ramfs_get_inode(struct super_block *sb,
+                               const struct inode *dir, int mode, dev_t dev)
 {
        struct inode * inode = new_inode(sb);
 
        if (inode) {
-               inode->i_mode = mode;
-               inode->i_uid = current_fsuid();
-               inode->i_gid = current_fsgid();
+               inode_init_owner(inode, dir, mode);
                inode->i_mapping->a_ops = &ramfs_aops;
                inode->i_mapping->backing_dev_info = &ramfs_backing_dev_info;
                mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER);
@@ -95,15 +94,10 @@ struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev)
 static int
 ramfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 {
-       struct inode * inode = ramfs_get_inode(dir->i_sb, mode, dev);
+       struct inode * inode = ramfs_get_inode(dir->i_sb, dir, mode, dev);
        int error = -ENOSPC;
 
        if (inode) {
-               if (dir->i_mode & S_ISGID) {
-                       inode->i_gid = dir->i_gid;
-                       if (S_ISDIR(mode))
-                               inode->i_mode |= S_ISGID;
-               }
                d_instantiate(dentry, inode);
                dget(dentry);   /* Extra count - pin the dentry in core */
                error = 0;
@@ -130,13 +124,11 @@ static int ramfs_symlink(struct inode * dir, struct dentry *dentry, const char *
        struct inode *inode;
        int error = -ENOSPC;
 
-       inode = ramfs_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0);
+       inode = ramfs_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0);
        if (inode) {
                int l = strlen(symname)+1;
                error = page_symlink(inode, symname, l);
                if (!error) {
-                       if (dir->i_mode & S_ISGID)
-                               inode->i_gid = dir->i_gid;
                        d_instantiate(dentry, inode);
                        dget(dentry);
                        dir->i_mtime = dir->i_ctime = CURRENT_TIME;
@@ -241,7 +233,7 @@ int ramfs_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_op                = &ramfs_ops;
        sb->s_time_gran         = 1;
 
-       inode = ramfs_get_inode(sb, S_IFDIR | fsi->mount_opts.mode, 0);
+       inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0);
        if (!inode) {
                err = -ENOMEM;
                goto fail;

diff --git a/include/linux/ramfs.h b/include/linux/ramfs.h
index 8600508c77a6e541ad30b54e152dd057f5cb6fc7..e7320b5e82fb4ac956f1cd0951488ddf1bc44637 100644 (file)
--- a/include/linux/ramfs.h
+++ b/include/linux/ramfs.h
@@ -1,7 +1,8 @@
 #ifndef _LINUX_RAMFS_H
 #define _LINUX_RAMFS_H
 
-struct inode *ramfs_get_inode(struct super_block *sb, int mode, dev_t dev);
+struct inode *ramfs_get_inode(struct super_block *sb, const struct inode *dir,
+        int mode, dev_t dev);
 extern int ramfs_get_sb(struct file_system_type *fs_type,
         int flags, const char *dev_name, void *data, struct vfsmount *mnt);
 

diff --git a/mm/shmem.c b/mm/shmem.c
index 717aa62ff127efb05125d0b6c510c259f53e9c24..0cd7f66f1c668ceb7043f21f0715aff7881962b5 100644 (file)
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1545,8 +1545,8 @@ static int shmem_mmap(struct file *file, struct vm_area_struct *vma)
        return 0;
 }
 
-static struct inode *shmem_get_inode(struct super_block *sb, int mode,
-                                       dev_t dev, unsigned long flags)
+static struct inode *shmem_get_inode(struct super_block *sb, const struct inode *dir,
+                                    int mode, dev_t dev, unsigned long flags)
 {
        struct inode *inode;
        struct shmem_inode_info *info;
@@ -1557,9 +1557,7 @@ static struct inode *shmem_get_inode(struct super_block *sb, int mode,
 
        inode = new_inode(sb);
        if (inode) {
-               inode->i_mode = mode;
-               inode->i_uid = current_fsuid();
-               inode->i_gid = current_fsgid();
+               inode_init_owner(inode, dir, mode);
                inode->i_blocks = 0;
                inode->i_mapping->backing_dev_info = &shmem_backing_dev_info;
                inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
@@ -1814,7 +1812,7 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
        struct inode *inode;
        int error = -ENOSPC;
 
-       inode = shmem_get_inode(dir->i_sb, mode, dev, VM_NORESERVE);
+       inode = shmem_get_inode(dir->i_sb, dir, mode, dev, VM_NORESERVE);
        if (inode) {
                error = security_inode_init_security(inode, dir, NULL, NULL,
                                                     NULL);
@@ -1833,11 +1831,6 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 #else
                error = 0;
 #endif
-               if (dir->i_mode & S_ISGID) {
-                       inode->i_gid = dir->i_gid;
-                       if (S_ISDIR(mode))
-                               inode->i_mode |= S_ISGID;
-               }
                dir->i_size += BOGO_DIRENT_SIZE;
                dir->i_ctime = dir->i_mtime = CURRENT_TIME;
                d_instantiate(dentry, inode);
@@ -1957,7 +1950,7 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
        if (len > PAGE_CACHE_SIZE)
                return -ENAMETOOLONG;
 
-       inode = shmem_get_inode(dir->i_sb, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE);
+       inode = shmem_get_inode(dir->i_sb, dir, S_IFLNK|S_IRWXUGO, 0, VM_NORESERVE);
        if (!inode)
                return -ENOSPC;
 
@@ -1992,8 +1985,6 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
                unlock_page(page);
                page_cache_release(page);
        }
-       if (dir->i_mode & S_ISGID)
-               inode->i_gid = dir->i_gid;
        dir->i_size += BOGO_DIRENT_SIZE;
        dir->i_ctime = dir->i_mtime = CURRENT_TIME;
        d_instantiate(dentry, inode);
@@ -2366,7 +2357,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent)
        sb->s_flags |= MS_POSIXACL;
 #endif
 
-       inode = shmem_get_inode(sb, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE);
+       inode = shmem_get_inode(sb, NULL, S_IFDIR | sbinfo->mode, 0, VM_NORESERVE);
        if (!inode)
                goto failed;
        inode->i_uid = sbinfo->uid;
@@ -2611,7 +2602,7 @@ int shmem_lock(struct file *file, int lock, struct user_struct *user)
 
 #define shmem_vm_ops                           generic_file_vm_ops
 #define shmem_file_operations                  ramfs_file_operations
-#define shmem_get_inode(sb, mode, dev, flags)  ramfs_get_inode(sb, mode, dev)
+#define shmem_get_inode(sb, dir, mode, dev, flags)     ramfs_get_inode(sb, dir, mode, dev)
 #define shmem_acct_size(flags, size)           0
 #define shmem_unacct_size(flags, size)         do {} while (0)
 #define SHMEM_MAX_BYTES                                MAX_LFS_FILESIZE
@@ -2655,7 +2646,7 @@ struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags
        path.mnt = mntget(shm_mnt);
 
        error = -ENOSPC;
-       inode = shmem_get_inode(root->d_sb, S_IFREG | S_IRWXUGO, 0, flags);
+       inode = shmem_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0, flags);
        if (!inode)
                goto put_dentry;