Ryusuke Konishi 705304a863 nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races ... Same story as in commit 41080b5a24 ("nfsd race fixes: ext2") (similar ext2 fix) except that nilfs2 needs to use insert_inode_locked4() instead of insert_inode_locked() and a bug of a check for dead inodes needs to be fixed. If nilfs_iget() is called from nfsd after nilfs_new_inode() calls insert_inode_locked4(), nilfs_iget() will wait for unlock_new_inode() at the end of nilfs_mkdir()/nilfs_create()/etc to unlock the inode. If nilfs_iget() is called before nilfs_new_inode() calls insert_inode_locked4(), it will create an in-core inode and read its data from the on-disk inode. But, nilfs_iget() will find i_nlink equals zero and fail at nilfs_read_inode_common(), which will lead it to call iget_failed() and cleanly fail. However, this sanity check doesn't work as expected for reused on-disk inodes because they leave a non-zero value in i_mode field and it hinders the test of i_nlink. This patch also fixes the issue by removing the test on i_mode that nilfs2 doesn't need. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2014-12-10 17:41:16 -08:00
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alloc.c
alloc.h
bmap.c
bmap.h
btnode.c
btnode.h
btree.c
btree.h
cpfile.c
cpfile.h
dat.c
dat.h
dir.c
direct.c
direct.h
export.h
file.c	nilfs2: avoid duplicate segment construction for fsync()	2014-12-10 17:41:16 -08:00
gcinode.c
ifile.c
ifile.h
inode.c	nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races	2014-12-10 17:41:16 -08:00
ioctl.c	nilfs2: add missing blkdev_issue_flush() to nilfs_sync_fs()	2014-10-14 02:18:20 +02:00
Kconfig
Makefile	nilfs2: integrate sysfs support into driver	2014-08-08 15:57:21 -07:00
mdt.c
mdt.h
namei.c	nilfs2: fix the nilfs_iget() vs. nilfs_new_inode() races	2014-12-10 17:41:16 -08:00
nilfs.h	nilfs2: improve the performance of fdatasync()	2014-10-14 02:18:20 +02:00
page.c
page.h
recovery.c
segbuf.c
segbuf.h
segment.c	nilfs2: improve the performance of fdatasync()	2014-10-14 02:18:20 +02:00
segment.h
sufile.c
sufile.h
super.c	nilfs2: add missing blkdev_issue_flush() to nilfs_sync_fs()	2014-10-14 02:18:20 +02:00
sysfs.c	nilfs2: integrate sysfs support into driver	2014-08-08 15:57:21 -07:00
sysfs.h	nilfs2: add /sys/fs/nilfs2/<device>/mounted_snapshots/<snapshot> group	2014-08-08 15:57:21 -07:00
the_nilfs.c	nilfs2: deletion of an unnecessary check before the function call "iput"	2014-12-10 17:41:16 -08:00
the_nilfs.h	nilfs2: add missing blkdev_issue_flush() to nilfs_sync_fs()	2014-10-14 02:18:20 +02:00