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JFS: Don't save agno in the inode

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Resizing the file system can result in an in-memory inode being remapped
to a different aggregate group (AG). A cached AG number can cause
problems when trying to free or allocate inodes. Instead, save the IAG's
agstart address and calculate the agno when we need it.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
This commit is contained in:
Dave Kleikamp 2011-06-20 10:53:46 -05:00
parent 28e0fa894c
commit d31b53e3cd
3 changed files with 9 additions and 9 deletions
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6
fs/jfs/file.c
View file

@ -66,9 +66,9 @@ static int jfs_open(struct inode *inode, struct file *file)
struct jfs_inode_info *ji = JFS_IP(inode);
spin_lock_irq(&ji->ag_lock);
if (ji->active_ag == -1) {
ji->active_ag = ji->agno;
atomic_inc(
&JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
}
spin_unlock_irq(&ji->ag_lock);
}

9
fs/jfs/jfs_imap.c
View file

@ -397,7 +397,7 @@ int diRead(struct inode *ip)
release_metapage(mp);
/* set the ag for the inode */
JFS_IP(ip)->agno = BLKTOAG(agstart, sbi);
JFS_IP(ip)->agstart = agstart;
JFS_IP(ip)->active_ag = -1;
return (rc);
@ -901,7 +901,7 @@ int diFree(struct inode *ip)
/* get the allocation group for this ino.
*/
agno = JFS_IP(ip)->agno;
agno = BLKTOAG(JFS_IP(ip)->agstart, JFS_SBI(ip->i_sb));
/* Lock the AG specific inode map information
*/
@ -1315,12 +1315,11 @@ int diFree(struct inode *ip)
static inline void
diInitInode(struct inode *ip, int iagno, int ino, int extno, struct iag * iagp)
{
struct jfs_sb_info *sbi = JFS_SBI(ip->i_sb);
struct jfs_inode_info *jfs_ip = JFS_IP(ip);
ip->i_ino = (iagno << L2INOSPERIAG) + ino;
jfs_ip->ixpxd = iagp->inoext[extno];
jfs_ip->agno = BLKTOAG(le64_to_cpu(iagp->agstart), sbi);
jfs_ip->agstart = le64_to_cpu(iagp->agstart);
jfs_ip->active_ag = -1;
}
@ -1379,7 +1378,7 @@ int diAlloc(struct inode *pip, bool dir, struct inode *ip)
*/
/* get the ag number of this iag */
agno = JFS_IP(pip)->agno;
agno = BLKTOAG(JFS_IP(pip)->agstart, JFS_SBI(pip->i_sb));
if (atomic_read(&JFS_SBI(pip->i_sb)->bmap->db_active[agno])) {
/*

3
fs/jfs/jfs_incore.h
View file

@ -50,8 +50,9 @@ struct jfs_inode_info {
short btindex; /* btpage entry index*/
struct inode *ipimap; /* inode map */
unsigned long cflag; /* commit flags */
long agstart; /* agstart of the containing IAG */
u16 bxflag; /* xflag of pseudo buffer? */
unchar agno; /* ag number */
unchar pad;
signed char active_ag; /* ag currently allocating from */
lid_t blid; /* lid of pseudo buffer? */
lid_t atlhead; /* anonymous tlock list head */