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authorDave Kleikamp <dave.kleikamp@oracle.com>2011-06-20 10:53:46 -0500
committerDave Kleikamp <dave.kleikamp@oracle.com>2011-06-20 10:53:46 -0500
commitd31b53e3cd069e02290ed8a648aa8c7618d6fe77 (patch)
tree529f1fab64d7b525e1a77510f3c9b02d24597c65 /fs/jfs
parent28e0fa894cd5996d3007ce82f07226f79beb7286 (diff)
downloadlinux-next-d31b53e3cd069e02290ed8a648aa8c7618d6fe77.tar.gz
JFS: Don't save agno in the inode
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>
Diffstat (limited to 'fs/jfs')
-rw-r--r--fs/jfs/file.c6
-rw-r--r--fs/jfs/jfs_imap.c9
-rw-r--r--fs/jfs/jfs_incore.h3
3 files changed, 9 insertions, 9 deletions
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index c5ce6c1d1ff4..2f3f531f3606 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -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);
}
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 0533e8f3d19e..b78b2f978f04 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -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])) {
/*
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 1439f119ec83..5097839b7709 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -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 */