int notify_change(struct dentry * dentry, struct iattr * attr) { struct inode *inode = dentry->d_inode; int error; time_t now = CURRENT_TIME; unsigned int ia_valid = attr->ia_valid; if (!inode) BUG(); attr->ia_ctime = now; if (!(ia_valid & ATTR_ATIME_SET)) attr->ia_atime = now; if (!(ia_valid & ATTR_MTIME_SET)) attr->ia_mtime = now; lock_kernel(); if (inode->i_op && inode->i_op->setattr) error = inode->i_op->setattr(dentry, attr); else { error = inode_change_ok(inode, attr); if (!error) { if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0; if (!error) error = inode_setattr(inode, attr); } } unlock_kernel(); if (!error) { unsigned long dn_mask = setattr_mask(ia_valid); if (dn_mask) dnotify_parent(dentry, dn_mask); } return error; }
int notify_change(struct dentry * dentry, struct iattr * attr) { struct inode *inode = dentry->d_inode; mode_t mode = inode->i_mode; int error; struct timespec now = CURRENT_TIME; unsigned int ia_valid = attr->ia_valid; if (!inode) BUG(); attr->ia_ctime = now; if (!(ia_valid & ATTR_ATIME_SET)) attr->ia_atime = now; if (!(ia_valid & ATTR_MTIME_SET)) attr->ia_mtime = now; if (ia_valid & ATTR_KILL_SUID) { attr->ia_valid &= ~ATTR_KILL_SUID; if (mode & S_ISUID) { if (!(ia_valid & ATTR_MODE)) { ia_valid = attr->ia_valid |= ATTR_MODE; attr->ia_mode = inode->i_mode; } attr->ia_mode &= ~S_ISUID; } } if (ia_valid & ATTR_KILL_SGID) { attr->ia_valid &= ~ ATTR_KILL_SGID; if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { if (!(ia_valid & ATTR_MODE)) { ia_valid = attr->ia_valid |= ATTR_MODE; attr->ia_mode = inode->i_mode; } attr->ia_mode &= ~S_ISGID; } } if (!attr->ia_valid) return 0; if (inode->i_op && inode->i_op->setattr) { error = security_inode_setattr(dentry, attr); if (!error) error = inode->i_op->setattr(dentry, attr); } else { error = inode_change_ok(inode, attr); if (!error) error = security_inode_setattr(dentry, attr); if (!error) { if ((ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) || (ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) error = DQUOT_TRANSFER(inode, attr) ? -EDQUOT : 0; if (!error) error = inode_setattr(inode, attr); } } if (!error) { #ifdef CONFIG_MOT_FEAT_INOTIFY fsnotify_change(dentry, ia_valid); #else unsigned long dn_mask = setattr_mask(ia_valid); if (dn_mask) dnotify_parent(dentry, dn_mask); #endif } return error; }