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authorSteven Whitehouse <swhiteho@redhat.com>2009-09-08 21:00:30 +0400
committerSteven Whitehouse <swhiteho@redhat.com>2009-09-08 21:00:30 +0400
commitacf7e2444acfaf4c8540603b76d71010eea3fc24 (patch)
tree7c31957ffbbb4008f368b8640c289f72657330a5 /fs/gfs2/rgrp.h
parent8d8291ae93ecb4a246e87e452d55cca412373300 (diff)
downloadlinux-acf7e2444acfaf4c8540603b76d71010eea3fc24.tar.xz
GFS2: Be extra careful about deallocating inodes
There is a potential race in the inode deallocation code if two nodes try to deallocate the same inode at the same time. Most of the issue is solved by the iopen locking. There is still a small window which is not covered by the iopen lock. This patches fixes that and also makes the deallocation code more robust in the face of any errors in the rgrp bitmaps, or erroneous iopen callbacks from other nodes. This does introduce one extra disk read, but that is generally not an issue since its the same block that must be written to later in the deallocation process. The total disk accesses therefore stay the same, Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/rgrp.h')
-rw-r--r--fs/gfs2/rgrp.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index a8dedd78245b..b4106ddaaa98 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -44,8 +44,6 @@ gfs2_inplace_reserve_i((ip), __FILE__, __LINE__)
extern void gfs2_inplace_release(struct gfs2_inode *ip);
-extern unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block);
-
extern int gfs2_alloc_block(struct gfs2_inode *ip, u64 *bn, unsigned int *n);
extern int gfs2_alloc_di(struct gfs2_inode *ip, u64 *bn, u64 *generation);
@@ -53,6 +51,8 @@ extern void gfs2_free_data(struct gfs2_inode *ip, u64 bstart, u32 blen);
extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
extern void gfs2_unlink_di(struct inode *inode);
+extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
+ unsigned int type);
struct gfs2_rgrp_list {
unsigned int rl_rgrps;