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* vfs: umount_tree() might be called on subtree that had never made itAl Viro2012-05-311-1/+2
| | | | | | | | | | __mnt_make_shortterm() in there undoes the effect of __mnt_make_longterm() we'd done back when we set ->mnt_ns non-NULL; it should not be done to vfsmounts that had never gone through commit_tree() and friends. Kudos to lczerner for catching that one... Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* brlocks/lglocks: API cleanupsAndi Kleen2012-05-301-69/+70
| | | | | | | | | | | | | | | | | | | | | lglocks and brlocks are currently generated with some complicated macros in lglock.h. But there's no reason to not just use common utility functions and put all the data into a common data structure. In preparation, this patch changes the API to look more like normal function calls with pointers, not magic macros. The patch is rather large because I move over all users in one go to keep it bisectable. This impacts the VFS somewhat in terms of lines changed. But no actual behaviour change. [akpm@linux-foundation.org: checkpatch fixes] Signed-off-by: Andi Kleen <ak@linux.intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* Merge branch 'for-linus' of ↵Linus Torvalds2012-01-081-2/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (53 commits) Kconfig: acpi: Fix typo in comment. misc latin1 to utf8 conversions devres: Fix a typo in devm_kfree comment btrfs: free-space-cache.c: remove extra semicolon. fat: Spelling s/obsolate/obsolete/g SCSI, pmcraid: Fix spelling error in a pmcraid_err() call tools/power turbostat: update fields in manpage mac80211: drop spelling fix types.h: fix comment spelling for 'architectures' typo fixes: aera -> area, exntension -> extension devices.txt: Fix typo of 'VMware'. sis900: Fix enum typo 'sis900_rx_bufer_status' decompress_bunzip2: remove invalid vi modeline treewide: Fix comment and string typo 'bufer' hyper-v: Update MAINTAINERS treewide: Fix typos in various parts of the kernel, and fix some comments. clockevents: drop unknown Kconfig symbol GENERIC_CLOCKEVENTS_MIGR gpio: Kconfig: drop unknown symbol 'CS5535_GPIO' leds: Kconfig: Fix typo 'D2NET_V2' sound: Kconfig: drop unknown symbol ARCH_CLPS7500 ... Fix up trivial conflicts in arch/powerpc/platforms/40x/Kconfig (some new kconfig additions, close to removed commented-out old ones)
| * Merge branch 'master' into for-nextJiri Kosina2011-11-131-0/+1
| |\ | | | | | | | | | | | | Sync with Linus tree to have 157550ff ("mtd: add GPMI-NAND driver in the config and Makefile") as I have patch depending on that one.
| * | namespace: mnt_want_write: Remove unused label 'out'Kautuk Consul2011-10-291-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | I was studying the code and I saw that the out label is not being used at all so I removed it and its usage from the function. Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | | vfs: prevent remount read-only if pending removesMiklos Szeredi2012-01-071-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | vfs: protect remounting superblock read-onlyMiklos Szeredi2012-01-071-1/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | vfs: keep list of mounts for each superblockMiklos Szeredi2012-01-071-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | vfs: switch ->show_options() to struct dentry *Al Viro2012-01-071-2/+2
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: trim includes a bitAl Viro2012-01-041-19/+6
| | | | | | | | | | | | | | | | | | [folded fix for missing magic.h from Tetsuo Handa] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | switch mnt_namespace ->root to struct mountAl Viro2012-01-041-6/+6
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: take /proc/*/mounts and friends to fs/proc_namespace.cAl Viro2012-01-041-211/+7
| | | | | | | | | | | | | | | | | | | | | 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>
* | | vfs: opencode mntget() mnt_set_mountpoint()Al Viro2012-01-041-1/+2
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - remaining argument of next_mnt()Al Viro2012-01-041-17/+18
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: move fsnotify junk to struct mountAl Viro2012-01-041-23/+22
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: move mnt_devnameAl Viro2012-01-041-9/+9
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: move mnt_list to struct mountAl Viro2012-01-041-23/+24
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: switch pnode.h macros to struct mount *Al Viro2012-01-041-21/+21
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: move the rest of int fields to struct mountAl Viro2012-01-041-15/+17
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: mnt_id/mnt_group_id movedAl Viro2012-01-041-15/+15
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: mnt_ns moved to struct mountAl Viro2012-01-041-22/+23
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - mntput_no_expireAl Viro2012-01-041-6/+7
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - do_add_mount and graft_treeAl Viro2012-01-041-11/+11
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: take mnt_share/mnt_slave/mnt_slave_list and mnt_expire to struct mountAl Viro2012-01-041-20/+21
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: and now we can make ->mnt_master point to struct mountAl Viro2012-01-041-2/+2
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: take mnt_master to struct mountAl Viro2012-01-041-5/+5
| | | | | | | | | | | | | | | | | | make IS_MNT_SLAVE take struct mount * at the same time Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - remaining argument of mnt_set_mountpoint()Al Viro2012-01-041-4/+4
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - propagate_mnt()Al Viro2012-01-041-6/+6
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - get_dominating_id / do_make_slaveAl Viro2012-01-041-1/+1
| | | | | | | | | | | | | | | | | | | | | next pile of horrors, similar to mnt_parent one; this time it's mnt_master. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: take mnt_child/mnt_mounts to struct mountAl Viro2012-01-041-21/+21
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: all counters taken to struct mountAl Viro2012-01-041-20/+20
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - work with countersAl Viro2012-01-041-60/+64
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: move mnt_mountpoint to struct mountAl Viro2012-01-041-18/+17
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: now it can be done - make mnt_parent point to struct mountAl Viro2012-01-041-26/+26
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: mnt_parent moved to struct mountAl Viro2012-01-041-22/+23
| | | | | | | | | | | | | | | | | | the second victim... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - is_path_reachableAl Viro2012-01-041-7/+7
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - mnt_has_parentAl Viro2012-01-041-9/+9
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - do_umount/propagate_mount_busyAl Viro2012-01-041-14/+14
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount mnt_set_mountpoint child argumentAl Viro2012-01-041-5/+5
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - clone_mnt/copy_tree argumentAl Viro2012-01-041-30/+33
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - shrink_submounts/select_submountsAl Viro2012-01-041-14/+14
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - umount_tree argumentAl Viro2012-01-041-18/+18
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: the first spoils - mnt_hash movedAl Viro2012-01-041-12/+12
| | | | | | | | | | | | | | | | | | taken out of struct vfsmount into struct mount Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount to remaining users of ->mnt_hashAl Viro2012-01-041-13/+13
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - clone_mnt/copy_tree resultAl Viro2012-01-041-18/+21
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - change_mnt_propagation/set_mnt_sharedAl Viro2012-01-041-4/+4
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - alloc_vfsmnt/free_vfsmnt/mnt_alloc_id/mnt_free_idAl Viro2012-01-041-41/+40
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - tree_contains_unbindableAl Viro2012-01-041-3/+3
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - attach_recursive_mntAl Viro2012-01-041-11/+14
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | vfs: spread struct mount - mount group id handlingAl Viro2012-01-041-18/+18
| | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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