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authorDave Hansen <haveblue@us.ibm.com>2006-10-01 02:29:03 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 03:39:30 -0400
commit9a53c3a783c2fa9b969628e65695c11c3e51e673 (patch)
tree5a6115e18ee105246d46e3db3d5b07749d232f5b /fs/msdos/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/msdos/namei.c')
-rw-r--r--fs/msdos/namei.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/fs/msdos/namei.c b/fs/msdos/namei.c
index d220165d4918..635613f2f65a 100644
--- a/fs/msdos/namei.c
+++ b/fs/msdos/namei.c
@@ -343,7 +343,7 @@ static int msdos_rmdir(struct inode *dir, struct dentry *dentry)
343 err = fat_remove_entries(dir, &sinfo); /* and releases bh */ 343 err = fat_remove_entries(dir, &sinfo); /* and releases bh */
344 if (err) 344 if (err)
345 goto out; 345 goto out;
346 dir->i_nlink--; 346 drop_nlink(dir);
347 347
348 inode->i_nlink = 0; 348 inode->i_nlink = 0;
349 inode->i_ctime = CURRENT_TIME_SEC; 349 inode->i_ctime = CURRENT_TIME_SEC;
@@ -549,7 +549,7 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
549 if (err) 549 if (err)
550 goto error_dotdot; 550 goto error_dotdot;
551 } 551 }
552 old_dir->i_nlink--; 552 drop_nlink(old_dir);
553 if (!new_inode) 553 if (!new_inode)
554 new_dir->i_nlink++; 554 new_dir->i_nlink++;
555 } 555 }
@@ -566,10 +566,9 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
566 mark_inode_dirty(old_dir); 566 mark_inode_dirty(old_dir);
567 567
568 if (new_inode) { 568 if (new_inode) {
569 drop_nlink(new_inode);
569 if (is_dir) 570 if (is_dir)
570 new_inode->i_nlink -= 2; 571 drop_nlink(new_inode);
571 else
572 new_inode->i_nlink--;
573 new_inode->i_ctime = ts; 572 new_inode->i_ctime = ts;
574 } 573 }
575out: 574out: