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fix setattr error handling in sysfs, configfs

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sysfs and configfs setattr functions have error cases after the generic inode's
attributes have been changed. Fix consistency by changing the generic inode
attributes only when it is guaranteed to succeed.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Nick Piggin 2010-05-31 17:58:02 +10:00 committed by Al Viro
parent 5b54470dad
commit 8718d36cf9
2 changed files with 8 additions and 7 deletions
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9
fs/configfs/inode.c
View file

@ -72,10 +72,6 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
if (!sd)
return -EINVAL;
error = simple_setattr(dentry, iattr);
if (error)
return error;
sd_iattr = sd->s_iattr;
if (!sd_iattr) {
/* setting attributes for the first time, allocate now */
@ -89,9 +85,12 @@ int configfs_setattr(struct dentry * dentry, struct iattr * iattr)
sd_iattr->ia_atime = sd_iattr->ia_mtime = sd_iattr->ia_ctime = CURRENT_TIME;
sd->s_iattr = sd_iattr;
}
/* attributes were changed atleast once in past */
error = simple_setattr(dentry, iattr);
if (error)
return error;
if (ia_valid & ATTR_UID)
sd_iattr->ia_uid = iattr->ia_uid;
if (ia_valid & ATTR_GID)

6
fs/sysfs/inode.c
View file

@ -117,11 +117,13 @@ int sysfs_setattr(struct dentry *dentry, struct iattr *iattr)
if (error)
goto out;
error = sysfs_sd_setattr(sd, iattr);
if (error)
goto out;
/* this ignores size changes */
generic_setattr(inode, iattr);
error = sysfs_sd_setattr(sd, iattr);
out:
mutex_unlock(&sysfs_mutex);
return error;