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46594 Commits

Author SHA1 Message Date
Jan Kara c3aa077648 reiserfs: Properly display mount options in /proc/mounts 
Make reiserfs properly display mount options in /proc/mounts.

CC: reiserfs-devel@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
 2012-01-06 23:20:13 -05:00
Miklos Szeredi 8e8b87964b vfs: prevent remount read-only if pending removes 
If there are any inodes on the super block that have been unlinked
(i_nlink == 0) but have not yet been deleted then prevent the
remounting the super block read-only.

Reported-by: Toshiyuki Okajima <toshi.okajima@jp.fujitsu.com>
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 23:20:13 -05:00
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