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719f5d7f0b
linux/fs
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Miklos Szeredi 719f5d7f0b [patch 4/7] vfs: mountinfo: add mount peer group ID 
Add a unique ID to each peer group using the IDR infrastructure.  The
identifiers are reused after the peer group dissolves.

The IDR structures are protected by holding namepspace_sem for write
while allocating or deallocating IDs.

IDs are allocated when a previously unshared vfsmount becomes the
first member of a peer group.  When a new member is added to an
existing group, the ID is copied from one of the old members.

IDs are freed when the last member of a peer group is unshared.

Setting the MNT_SHARED flag on members of a subtree is done as a
separate step, after all the IDs have been allocated.  This way an
allocation failure can be cleaned up easilty, without affecting the
propagation state.

Based on design sketch by Al Viro.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-04-23 00:04:51 -04:00
..
9p fs: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:44 -04:00
adfs mount options: fix adfs 2008-02-08 09:22:39 -08:00
affs mount options: fix affs 2008-02-08 09:22:39 -08:00
afs AFS: Do not describe debug parameters with their value 2008-04-16 07:43:48 -07:00
autofs mount options: fix autofs 2008-02-08 09:22:40 -08:00
autofs4 Introduce path_put() 2008-02-14 21:13:33 -08:00
befs mount options: fix befs 2008-02-08 09:22:40 -08:00
bfs iget: stop BFS from using iget() and read_inode() 2008-02-07 08:42:27 -08:00
cifs cifs: fix misannotations 2008-03-30 14:20:23 -07:00
coda Introduce path_put() 2008-02-14 21:13:33 -08:00
configfs Introduce path_put() 2008-02-14 21:13:33 -08:00
cramfs fs: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:44 -04:00
debugfs debugfs: fix sparse warnings 2008-03-04 14:47:06 -08:00
devpts mount options: fix devpts 2008-02-08 09:22:40 -08:00
dlm Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm 2008-04-22 13:44:23 -07:00
ecryptfs eCryptfs: Swap dput() and mntput() 2008-03-19 18:53:36 -07:00
efs efs: update error msg to not refer to deleted read_inode() 2008-04-02 15:28:19 -07:00
exportfs exportfs: update documentation 2007-10-22 08:13:21 -07:00
ext2 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
ext3 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
ext4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial 2008-04-21 16:36:46 -07:00
fat [PATCH] r/o bind mounts: elevate write count for ioctls() 2008-04-19 00:29:24 -04:00
freevxfs iget: stop FreeVXFS from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
fuse fuse: fix permission checking 2008-02-23 17:12:13 -08:00
gfs2 dlm: move plock code from gfs2 2008-04-21 11:22:28 -05:00
hfs hfs_bnode_find() can fail, resulting in hfs_bnode_split() breakage 2008-03-17 09:46:55 -07:00
hfsplus [PATCH] r/o bind mounts: elevate write count for ioctls() 2008-04-19 00:29:24 -04:00
hostfs uml: fix hostfs tv_usec calculations 2008-02-05 09:44:30 -08:00
hpfs mount options: fix hpfs 2008-02-08 09:22:40 -08:00
hppfs [PATCH] sanitize hppfs 2008-03-19 06:42:18 -04:00
hugetlbfs [PATCH] double iput() on failure exit in hugetlb 2008-03-19 06:55:01 -04:00
isofs zisofs: fix readpage() outside i_size 2008-03-19 18:53:36 -07:00
jbd jbd/jbd2 NULL noise 2008-03-30 14:18:41 -07:00
jbd2 jbd/jbd2 NULL noise 2008-03-30 14:18:41 -07:00
jffs2 Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
jfs [PATCH] r/o bind mounts: elevate write count for ioctls() 2008-04-19 00:29:24 -04:00
lockd Wrap buffers used for rpc debug printks into RPC_IFDEBUG 2008-02-21 18:42:29 -05:00
minix iget: stop the MINIX filesystem from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
msdos
ncpfs [PATCH] r/o bind mounts: elevate write count for ncp_ioctl() 2008-04-19 00:29:23 -04:00
nfs [PATCH] r/o bind mounts: check mnt instead of superblock directly 2008-04-19 00:29:27 -04:00
nfs_common
nfsd [PATCH] r/o bind mounts: check mnt instead of superblock directly 2008-04-19 00:29:27 -04:00
nls sparse pointer use of zero as null 2007-10-18 14:37:31 -07:00
ntfs is_vmalloc_addr(): Check if an address is within the vmalloc boundaries 2008-02-05 09:44:14 -08:00
ocfs2 [PATCH] r/o bind mounts: elevate write count for ioctls() 2008-04-19 00:29:24 -04:00
openpromfs iget: stop OPENPROMFS from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
partitions block: send disk "change" event for rescan_partitions() 2008-04-19 19:10:24 -07:00
proc [PATCH] proc_readfd_common() race fix 2008-04-22 19:55:03 -04:00
qnx4 iget: stop QNX4 from using iget() and read_inode() 2008-02-07 08:42:28 -08:00
ramfs Remove valueless definition of hard-selected RAMFS option 2007-10-17 08:42:56 -07:00
reiserfs Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc 2008-04-21 15:41:27 -07:00
romfs ROMFS: Fix up an error in iget removal 2008-03-19 18:53:36 -07:00
smbfs NULL noise: fs/*, mm/*, kernel/* 2008-03-30 14:18:41 -07:00
sysfs sysfs: refill attribute buffer when reading from offset 0 2008-04-19 19:10:29 -07:00
sysv iget: stop the SYSV filesystem from using iget() and read_inode() 2008-02-07 08:42:29 -08:00
udf udf: use crc_itu_t from lib instead of udf_crc 2008-04-17 14:29:56 +02:00
ufs fs/ufs/balloc.c: fix sparc64 printk warning 2008-03-19 18:53:37 -07:00
vfat Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
xfs Merge branch 'semaphore' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc 2008-04-21 15:41:27 -07:00
aio.c eventfd/kaio integration fix 2008-04-11 08:06:43 -07:00
anon_inodes.c [PATCH] fix up new filp allocators 2008-03-19 06:54:05 -04:00
attr.c VFS: make notify_change pass ATTR_KILL_S*ID to setattr operations 2007-10-18 14:37:22 -07:00
bad_inode.c iget: introduce a function to register iget failure 2008-02-07 08:42:26 -08:00
binfmt_aout.c aout: suppress A.OUT library support if !CONFIG_ARCH_SUPPORTS_AOUT 2008-02-08 09:22:30 -08:00
binfmt_elf_fdpic.c pid namespaces: changes to show virtual ids to user 2007-10-19 11:53:40 -07:00
binfmt_elf.c core dump: user_regset writeback 2008-03-04 16:35:10 -08:00
binfmt_em86.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_flat.c FLAT binaries: drop BINFMT_FLAT bad header magic warning 2008-02-14 20:58:05 -08:00
binfmt_misc.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_script.c Convert files to UTF-8 and some cleanups 2007-10-19 23:21:04 +02:00
binfmt_som.c aout: remove unnecessary inclusions of {asm, linux}/a.out.h 2008-02-08 09:22:30 -08:00
bio.c block: convert bio_copy_user to bio_copy_user_iov 2008-04-21 09:50:08 +02:00
block_dev.c fs/block_dev.c: remove #if 0'ed code 2008-02-19 10:04:00 +01:00
buffer.c Be more careful about marking buffers dirty 2008-04-04 14:38:17 -07:00
char_dev.c fs/char_dev.c: chrdev_open marked static and removed from fs.h 2008-02-08 09:22:42 -08:00
compat_binfmt_elf.c x86: compat_binfmt_elf 2008-01-30 13:31:46 +01:00
compat_ioctl.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
compat.c Merge branch 'linus_origin' into hotfixes 2008-02-15 13:36:30 -05:00
dcache.c [patch 2/7] vfs: mountinfo: add seq_file_root() 2008-04-23 00:04:38 -04:00
dcookies.c d_path: Make d_path() use a struct path 2008-02-14 21:17:09 -08:00
direct-io.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
dnotify.c
dquot.c quota: add possibly missing iput() when quotaon and quotaoff races 2008-03-19 18:53:35 -07:00
drop_caches.c
eventfd.c fs/eventfd.c should #include <linux/syscalls.h> 2008-02-06 10:41:03 -08:00
eventpoll.c lockdep: annotate epoll 2008-02-05 09:44:07 -08:00
exec.c Allow ARG_MAX execve string space even with a small stack limit 2008-03-03 10:12:14 -08:00
fcntl.c fs: remove fastcall, it is always empty 2008-02-08 09:22:31 -08:00
fifo.c
file_table.c [PATCH] r/o bind mounts: debugging for missed calls 2008-04-19 00:29:28 -04:00
file.c get rid of NR_OPEN and introduce a sysctl_nr_open 2008-02-06 10:41:06 -08:00
filesystems.c
fs-writeback.c fs: fix kernel-doc notation warnings 2008-03-19 18:53:36 -07:00
generic_acl.c
inode.c [PATCH] r/o bind mounts: write count for file_update_time() 2008-04-19 00:29:24 -04:00
inotify_user.c Introduce path_put() 2008-02-14 21:13:33 -08:00
inotify.c inotify: remove debug code 2008-02-06 10:41:07 -08:00
internal.h [PATCH] move a bunch of declarations to fs/internal.h 2008-04-21 23:11:01 -04:00
ioctl.c fix up kerneldoc in fs/ioctl.c a little bit 2008-02-09 11:08:33 -08:00
ioprio.c cfq-iosched: relax IOPRIO_CLASS_IDLE restrictions 2008-01-28 11:38:15 +01:00
Kconfig Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6 2008-04-22 13:40:47 -07:00
Kconfig.binfmt [SPARC]: Remove SunOS and Solaris binary support. 2008-04-21 15:10:15 -07:00
libfs.c Pagecache zeroing: zero_user_segment, zero_user_segments and zero_user 2008-02-05 09:44:13 -08:00
locks.c fs: Remove unnecessary inclusions of asm/semaphore.h 2008-04-18 22:16:44 -04:00
Makefile x86: compat_binfmt_elf Kconfig 2008-01-30 13:31:46 +01:00
mbcache.c vfs: fix possible deadlock in ext2, ext3, ext4 when using xattrs 2008-04-15 19:35:41 -07:00
mpage.c docbook: fix filesystems.tmpl source files 2008-03-03 10:47:13 -08:00
namei.c [PATCH] r/o bind mounts: elevate write count for open()s 2008-04-19 00:29:25 -04:00
namespace.c [patch 4/7] vfs: mountinfo: add mount peer group ID 2008-04-23 00:04:51 -04:00
nfsctl.c Introduce path_put() 2008-02-14 21:13:33 -08:00
no-block.c
open.c [PATCH] r/o bind mounts: debugging for missed calls 2008-04-19 00:29:28 -04:00
pipe.c [PATCH] double-free of inode on alloc_file() failure exit in create_write_pipe() 2008-04-22 19:54:57 -04:00
pnode.c [patch 4/7] vfs: mountinfo: add mount peer group ID 2008-04-23 00:04:51 -04:00
pnode.h [PATCH] teach seq_file to discard entries 2008-04-21 23:14:02 -04:00
posix_acl.c
quota_v1.c
quota_v2.c
quota.c Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
read_write.c fs: use loff_t type instead of long long 2008-04-22 15:17:11 -07:00
read_write.h
readdir.c Use mutex_lock_killable in vfs_readdir 2007-12-06 17:39:54 -05:00
select.c trivial: small cleanups 2008-04-21 22:15:06 +00:00
seq_file.c [patch 2/7] vfs: mountinfo: add seq_file_root() 2008-04-23 00:04:38 -04:00
signalfd.c signalfd: fix for incorrect SI_QUEUE user data reporting 2008-04-11 08:06:44 -07:00
splice.c splice: fix infinite loop in generic_file_splice_read() 2008-04-10 08:24:25 +02:00
stack.c
stat.c Introduce path_put() 2008-02-14 21:13:33 -08:00
super.c [PATCH] move a bunch of declarations to fs/internal.h 2008-04-21 23:11:01 -04:00
sync.c
timerfd.c timerfd: new timerfd API 2008-02-05 09:44:07 -08:00
utimes.c [PATCH] r/o bind mounts: elevate write count for do_utimes() 2008-04-19 00:29:24 -04:00
xattr_acl.c
xattr.c [PATCH] remove unused label in xattr.c (noise from ro-bind) 2008-04-23 00:04:04 -04:00