fat: fat_notify_change() and check_mode() cleanup

- Rename fat_notify_change() to fat_setattr()
- check_mode() cleanup
- Change layout of code

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 84 insertions, 99 deletions

diff --git a/fs/fat/file.c b/fs/fat/file.c
index 2a3bed967041..b61a98f5398a 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -157,104 +157,6 @@ out:
         return err;
 }
 
-static int check_mode(const struct msdos_sb_info *sbi, mode_t mode)
-{
-        mode_t req = mode & ~S_IFMT;
-
-        /*
-         * Of the r and x bits, all (subject to umask) must be present. Of the
-         * w bits, either all (subject to umask) or none must be present.
-         */
-
-        if (S_ISREG(mode)) {
-                req &= ~sbi->options.fs_fmask;
-
-                if ((req & (S_IRUGO | S_IXUGO)) !=
-                    ((S_IRUGO | S_IXUGO) & ~sbi->options.fs_fmask))
-                        return -EPERM;
-
-                if ((req & S_IWUGO) != 0 &&
-                    (req & S_IWUGO) != (S_IWUGO & ~sbi->options.fs_fmask))
-                        return -EPERM;
-        } else if (S_ISDIR(mode)) {
-                req &= ~sbi->options.fs_dmask;
-
-                if ((req & (S_IRUGO | S_IXUGO)) !=
-                    ((S_IRUGO | S_IXUGO) & ~sbi->options.fs_dmask))
-                        return -EPERM;
-
-                if ((req & S_IWUGO) != 0 &&
-                    (req & S_IWUGO) != (S_IWUGO & ~sbi->options.fs_dmask))
-                        return -EPERM;
-        } else {
-                return -EPERM;
-        }
-
-        return 0;
-}
-
-int fat_notify_change(struct dentry *dentry, struct iattr *attr)
-{
-        struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
-        struct inode *inode = dentry->d_inode;
-        int mask, error = 0;
-
-        lock_kernel();
-
-        /*
-         * Expand the file. Since inode_setattr() updates ->i_size
-         * before calling the ->truncate(), but FAT needs to fill the
-         * hole before it.
-         */
-        if (attr->ia_valid & ATTR_SIZE) {
-                if (attr->ia_size > inode->i_size) {
-                        error = fat_cont_expand(inode, attr->ia_size);
-                        if (error || attr->ia_valid == ATTR_SIZE)
-                                goto out;
-                        attr->ia_valid &= ~ATTR_SIZE;
-                }
-        }
-
-        error = inode_change_ok(inode, attr);
-        if (error) {
-                if (sbi->options.quiet)
-                        error = 0;
-                goto out;
-        }
-        if (((attr->ia_valid & ATTR_UID) &&
-             (attr->ia_uid != sbi->options.fs_uid)) ||
-            ((attr->ia_valid & ATTR_GID) &&
-             (attr->ia_gid != sbi->options.fs_gid)))
-                error = -EPERM;
-
-        if (error) {
-                if (sbi->options.quiet)
-                        error = 0;
-                goto out;
-        }
-
-        if (attr->ia_valid & ATTR_MODE) {
-                error = check_mode(sbi, attr->ia_mode);
-                if (error != 0 && !sbi->options.quiet)
-                        goto out;
-        }
-
-        error = inode_setattr(inode, attr);
-        if (error)
-                goto out;
-
-        if (S_ISDIR(inode->i_mode))
-                mask = sbi->options.fs_dmask;
-        else
-                mask = sbi->options.fs_fmask;
-        inode->i_mode &= S_IFMT | (S_IRWXUGO & ~mask);
-out:
-        unlock_kernel();
-        return error;
-}
-
-EXPORT_SYMBOL_GPL(fat_notify_change);
-
 /* Free all clusters after the skip'th cluster. */
 static int fat_free(struct inode *inode, int skip)
 {
@@ -355,8 +257,91 @@ int fat_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
 }
 EXPORT_SYMBOL_GPL(fat_getattr);
 
+static int fat_check_mode(const struct msdos_sb_info *sbi, mode_t mode)
+{
+        mode_t mask, req = mode & ~S_IFMT;
+
+        if (S_ISREG(mode))
+                mask = sbi->options.fs_fmask;
+        else
+                mask = sbi->options.fs_dmask;
+
+        /*
+         * Of the r and x bits, all (subject to umask) must be present. Of the
+         * w bits, either all (subject to umask) or none must be present.
+         */
+        req &= ~mask;
+        if ((req & (S_IRUGO | S_IXUGO)) != ((S_IRUGO | S_IXUGO) & ~mask))
+                return -EPERM;
+        if ((req & S_IWUGO) && ((req & S_IWUGO) != (S_IWUGO & ~mask)))
+                return -EPERM;
+
+        return 0;
+}
+
+int fat_setattr(struct dentry *dentry, struct iattr *attr)
+{
+        struct msdos_sb_info *sbi = MSDOS_SB(dentry->d_sb);
+        struct inode *inode = dentry->d_inode;
+        int mask, error = 0;
+
+        lock_kernel();
+
+        /*
+         * Expand the file. Since inode_setattr() updates ->i_size
+         * before calling the ->truncate(), but FAT needs to fill the
+         * hole before it.
+         */
+        if (attr->ia_valid & ATTR_SIZE) {
+                if (attr->ia_size > inode->i_size) {
+                        error = fat_cont_expand(inode, attr->ia_size);
+                        if (error || attr->ia_valid == ATTR_SIZE)
+                                goto out;
+                        attr->ia_valid &= ~ATTR_SIZE;
+                }
+        }
+
+        error = inode_change_ok(inode, attr);
+        if (error) {
+                if (sbi->options.quiet)
+                        error = 0;
+                goto out;
+        }
+        if (((attr->ia_valid & ATTR_UID) &&
+             (attr->ia_uid != sbi->options.fs_uid)) ||
+            ((attr->ia_valid & ATTR_GID) &&
+             (attr->ia_gid != sbi->options.fs_gid)))
+                error = -EPERM;
+
+        if (error) {
+                if (sbi->options.quiet)
+                        error = 0;
+                goto out;
+        }
+
+        if (attr->ia_valid & ATTR_MODE) {
+                error = fat_check_mode(sbi, attr->ia_mode);
+                if (error != 0 && !sbi->options.quiet)
+                        goto out;
+        }
+
+        error = inode_setattr(inode, attr);
+        if (error)
+                goto out;
+
+        if (S_ISDIR(inode->i_mode))
+                mask = sbi->options.fs_dmask;
+        else
+                mask = sbi->options.fs_fmask;
+        inode->i_mode &= S_IFMT | (S_IRWXUGO & ~mask);
+out:
+        unlock_kernel();
+        return error;
+}
+EXPORT_SYMBOL_GPL(fat_setattr);
+
 const struct inode_operations fat_file_inode_operations = {
         .truncate       = fat_truncate,
-        .setattr        = fat_notify_change,
+        .setattr        = fat_setattr,
         .getattr        = fat_getattr,
 };