The Saints also placed receiver
The Saints also waived linebacker Eric Martin, safety Akwasi Owusu-Ansah and receiver Tim Toone as they got their roster down to the 75-player maximum.
Smith was injured during the first half of Sunday's win over the Houston Texans when his right leg was rolled under another player during a sack.
The 49ers announced Haralson's trade earlier Tuesday, saying they will receive an undisclosed 2014 draft pick in return.
"Parys has been a consummate professional throughout his seven years as a 49er,” San Francisco 49ers General Manager Trent Baalke said in a statement.
San Francisco selected the Flora, Miss., native in the fifth round (140th overall) of the 2006 NFL Draft out of Tennessee, Haralson has played in 86 games (68 starts). In seven seasons as a 49er, he registered 295 tackles, 21.5 sacks, four fumble recoveries and three forced fumbles. His 21.5 career sacks rank tied for fourth among 49ers linebackers since sacks became an official statistic in 1982.
Rolle is a 23-year-old rookie from Catawba who registered an intereception, two passes defensed and four tackles in the Bills' first three preseason games. He is 6 feet and weighs 185 pounds.