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authorDave Hansen <haveblue@us.ibm.com>2006-09-30 23:29:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 00:39:30 -0700
commit9a53c3a783c2fa9b969628e65695c11c3e51e673 (patch)
tree5a6115e18ee105246d46e3db3d5b07749d232f5b /fs/reiserfs/namei.c
parentaab520e2f6c80160cabd187a8d0292d1cec8ff68 (diff)
[PATCH] r/o bind mounts: unlink: monitor i_nlink
When a filesystem decrements i_nlink to zero, it means that a write must be performed in order to drop the inode from the filesystem. We're shortly going to have keep filesystems from being remounted r/o between the time that this i_nlink decrement and that write occurs. So, add a little helper function to do the decrements. We'll tie into it in a bit to note when i_nlink hits zero. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/reiserfs/namei.c')
-rw-r--r--fs/reiserfs/namei.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index c61710e49c6..c76d427e027 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -20,7 +20,7 @@
#include <linux/quotaops.h>
#define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { i->i_nlink++; if (i->i_nlink >= REISERFS_LINK_MAX) i->i_nlink=1; }
-#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) i->i_nlink--;
+#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i);
// directory item contains array of entry headers. This performs
// binary search through that array
@@ -994,7 +994,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
inode->i_nlink = 1;
}
- inode->i_nlink--;
+ drop_nlink(inode);
/*
* we schedule before doing the add_save_link call, save the link
@@ -1475,7 +1475,7 @@ static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (S_ISDIR(new_dentry_inode->i_mode)) {
new_dentry_inode->i_nlink = 0;
} else {
- new_dentry_inode->i_nlink--;
+ drop_nlink(new_dentry_inode);
}
new_dentry_inode->i_ctime = ctime;
savelink = new_dentry_inode->i_nlink;