AuxXxilium/linux_dsm_epyc7002
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7ada4db886
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46592 Commits

Author SHA1 Message Date
Miklos Szeredi
7ada4db886 vfs: count unlinked inodes 
Add a new counter to the superblock that keeps track of unlinked but
not yet deleted inodes.

Do not WARN_ON if set_nlink is called with zero count, just do a
ratelimited printk.  This happens on xfs and probably other
filesystems after an unclean shutdown when the filesystem reads inodes
which already have zero i_nlink.  Reported by Christoph Hellwig.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:20:12 -05:00
Miklos Szeredi
4ed5e82fe7 vfs: protect remounting superblock read-only 
Currently remouting superblock read-only is racy in a major way.

With the per mount read-only infrastructure it is now possible to
prevent most races, which this patch attempts.

Before starting the remount read-only, iterate through all mounts
belonging to the superblock and if none of them have any pending
writes, set sb->s_readonly_remount.  This indicates that remount is in
progress and no further write requests are allowed.  If the remount
succeeds set MS_RDONLY and reset s_readonly_remount.

If the remounting is unsuccessful just reset s_readonly_remount.
This can result in transient EROFS errors, despite the fact the
remount failed.  Unfortunately hodling off writes is difficult as
remount itself may touch the filesystem (e.g. through load_nls())
which would deadlock.

A later patch deals with delayed writes due to nlink going to zero.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:20:12 -05:00
Miklos Szeredi
39f7c4db1d vfs: keep list of mounts for each superblock 
Keep track of vfsmounts belonging to a superblock.  List is protected
by vfsmount_lock.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Tested-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:20:12 -05:00
Al Viro
34c80b1d93 vfs: switch ->show_options() to struct dentry * 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:19:54 -05:00
Al Viro
a6322de67b vfs: switch ->show_path() to struct dentry * 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:16:55 -05:00
Al Viro
d861c630e9 vfs: switch ->show_devname() to struct dentry * 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:16:54 -05:00
Al Viro
64132379d5 vfs: switch ->show_stats to struct dentry * 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:16:54 -05:00
Al Viro
cdcf116d44 switch security_path_chmod() to struct path * 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:16:53 -05:00
Al Viro
ece2ccb668 Merge branches 'vfsmount-guts', 'umode_t' and 'partitions' into Z 2012-01-06 23:15:54 -05:00
Al Viro
0226f4923f vfs: take /proc/*/mounts and friends to fs/proc_namespace.c 
rationale: that stuff is far tighter bound to fs/namespace.c than to
the guts of procfs proper.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:13 -05:00
Al Viro
c63181e6b6 vfs: move fsnotify junk to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:12 -05:00
Al Viro
52ba1621de vfs: move mnt_devname 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:11 -05:00
Al Viro
1a4eeaf2a8 vfs: move mnt_list to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:11 -05:00
Al Viro
863d684f94 vfs: move the rest of int fields to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:10 -05:00
Al Viro
15169fe784 vfs: mnt_id/mnt_group_id moved 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:10 -05:00
Al Viro
143c8c91ce vfs: mnt_ns moved to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:09 -05:00
Al Viro
6776db3d32 vfs: take mnt_share/mnt_slave/mnt_slave_list and mnt_expire to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:08 -05:00
Al Viro
d10e8def07 vfs: take mnt_master to struct mount 
make IS_MNT_SLAVE take struct mount * at the same time

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:08 -05:00
Al Viro
6b41d536f7 vfs: take mnt_child/mnt_mounts to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:06 -05:00
Al Viro
68e8a9feab vfs: all counters taken to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:06 -05:00
Al Viro
a73324da7a vfs: move mnt_mountpoint to struct mount 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:05 -05:00
Al Viro
3376f34fff vfs: mnt_parent moved to struct mount 
the second victim...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:04 -05:00
Al Viro
1b8e5564b9 vfs: the first spoils - mnt_hash moved 
taken out of struct vfsmount into struct mount

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:57:02 -05:00
Al Viro
a218d0fdc5 switch open and mkdir syscalls to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:19 -05:00
Al Viro
04fc66e789 switch ->path_mknod() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:19 -05:00
Al Viro
4572befe24 switch ->path_mkdir() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:18 -05:00
Al Viro
2570ebbd1f switch kern_ipc_perm to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:17 -05:00
Al Viro
0583fcc96b consolidate umode_t declarations 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:17 -05:00
Al Viro
1bc94226d5 switch spu_create(2) to use of SYSCALL_DEFINE4, make it use umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:16 -05:00
Al Viro
df0a42837b switch mq_open() to umode_t 2012-01-03 22:55:16 -05:00
Al Viro
a85cfdaec9 switch miscdevice to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:15 -05:00
Al Viro
52ef0c042b switch securityfs_create_file() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:13 -05:00
Al Viro
910f4ecef3 switch security_path_chmod() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:13 -05:00
Al Viro
49f0a07672 switch sys_chmod()/sys_fchmod()/sys_fchmodat() to umode_t 
SYSCALLx magic should take care of things, according to Linus...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:12 -05:00
Al Viro
36fcb589e7 sysctl: use umode_t for table permissions 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:12 -05:00
Al Viro
8d334acdd2 switch is_sxid() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:11 -05:00
Al Viro
62bb109170 switch inode_init_owner() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:11 -05:00
Al Viro
632861f05a pohmelfs: propagate umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:07 -05:00
Al Viro
09208d150b shmem, ramfs: propagate umode_t, open-coded S_ISREG 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:07 -05:00
Al Viro
64f1426f3c sunrpc: propagate umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:04 -05:00
Al Viro
a5e7ed3287 cgroup: propagate mode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:03 -05:00
Al Viro
8e0718924e reiserfs: propagate umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:55:00 -05:00
Al Viro
69b34f3ab3 ext3: propagate umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:58 -05:00
Al Viro
439475140b configfs: convert to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:57 -05:00
Al Viro
f4ae40a6a5 switch debugfs to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:56 -05:00
Al Viro
48176a973d switch sysfs_chmod_file() to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:56 -05:00
Al Viro
d161a13f97 switch procfs to umode_t use 
both proc_dir_entry ->mode and populating functions

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:56 -05:00
Al Viro
587a1f1659 switch ->is_visible() to returning umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:55 -05:00
Al Viro
9104e427f3 switch sysfs attr->mode to umode_t 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:55 -05:00
Al Viro
2c9ede55ec switch device_get_devnode() and ->devnode() to umode_t * 
both callers of device_get_devnode() are only interested in lower 16bits
and nobody tries to return anything wider than 16bit anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-03 22:54:55 -05:00