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* fs/nfs/dir.c: switch to passing nd->flags instead of nd wherever possibleAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfs_lookup_verify_inode() - nd is *always* non-NULL hereAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch nfs_lookup_check_intent() away from nameidataAl Viro2012-07-14
| | | | | | just pass the flags Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* do_dentry_open(): take initialization of file->f_path to callerAl Viro2012-07-14
| | | | | | | ... and get rid of a couple of arguments and a pointless reassignment in finish_open() case. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fold __dentry_open() into its sole callerAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* switch do_dentry_open() to returning intAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* make finish_no_open() return intAl Viro2012-07-14
| | | | | | | namely, 1 ;-) That's what we want to return from ->atomic_open() instances after finish_no_open(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs/namei.c: get do_last() and friends return intAl Viro2012-07-14
| | | | | | | Same conventions as for ->atomic_open(). Trimmed the forest of labels a bit, while we are at it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* kill struct opendataAl Viro2012-07-14
| | | | | | | | | Just pass struct file *. Methods are happier that way... There's no need to return struct file * from finish_open() now, so let it return int. Next: saner prototypes for parts in namei.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* kill opendata->{mnt,dentry}Al Viro2012-07-14
| | | | | | ->filp->f_path is there for purpose... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* make ->atomic_open() return intAl Viro2012-07-14
| | | | | | | | | | | | Change of calling conventions: old new NULL 1 file 0 ERR_PTR(-ve) -ve Caller *knows* that struct file *; no need to return it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* don't modify od->filp at allAl Viro2012-07-14
| | | | | | make put_filp() conditional on flag set by finish_open() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ->atomic_open() prototype change - pass int * instead of bool *Al Viro2012-07-14
| | | | | | | | | ... and let finish_open() report having opened the file via that sucker. Next step: don't modify od->filp at all. [AV: FILE_CREATE was already used by cifs; Miklos' fix folded] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: move O_DIRECT check to common codeMiklos Szeredi2012-07-14
| | | | | | | | Perform open_check_o_direct() in a common place in do_last after opening the file. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): clean up retryMiklos Szeredi2012-07-14
| | | | | | | | | Move the lookup retry logic to the bottom of the function to make the normal case simpler to read. Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): clean up boolMiklos Szeredi2012-07-14
| | | | | | | | Consistently use bool for boolean values in do_last(). Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): clean up labelsMiklos Szeredi2012-07-14
| | | | | | Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): clean up error handlingMiklos Szeredi2012-07-14
| | | | | Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: remove open intents from nameidataMiklos Szeredi2012-07-14
| | | | | | | | | All users of open intents have been converted to use ->atomic_{open,create}. This patch gets rid of nd->intent.open and related infrastructure. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* 9p: implement i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | | Add an ->atomic_open implementation which replaces the atomic open+create operation implemented via ->create. No functionality is changed. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Eric Van Hensbergen <ericvh@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ceph: implement i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | | Add an ->atomic_open implementation which replaces the atomic lookup+open+create operation implemented via ->lookup and ->create operations. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ceph: remove unused arg from ceph_lookup_open()Miklos Szeredi2012-07-14
| | | | | | | | What was the purpose of this? Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Sage Weil <sage@newdream.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* cifs: implement i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | | Add an ->atomic_open implementation which replaces the atomic lookup+open+create operation implemented via ->lookup and ->create operations. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Steve French <sfrench@samba.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fuse: implement i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | Add an ->atomic_open implementation which replaces the atomic open+create operation implemented via ->create. No functionality is changed. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfs: don't use intents for checking atomic openMiklos Szeredi2012-07-14
| | | | | | | | | | | | | | | | is_atomic_open() is now only used by nfs4_lookup_revalidate() to check whether it's okay to skip normal revalidation. It does a racy check for mount read-onlyness and falls back to normal revalidation if the open would fail. This makes little sense now that this function isn't used for determining whether to actually open the file or not. The d_mountpoint() check still makes sense since it is an indication that we might be following a mount and so open may not revalidate the dentry. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfs: don't use nd->intent.open.flagsMiklos Szeredi2012-07-14
| | | | | | | | | Instead check LOOKUP_EXCL in nd->flags, which is basically what the open intent flags were used for. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfs: clean up ->create in nfs_rpc_opsMiklos Szeredi2012-07-14
| | | | | | | | | | | | | | Don't pass nfs_open_context() to ->create(). Only the NFS4 implementation needed that and only because it wanted to return an open file using open intents. That task has been replaced by ->atomic_open so it is not necessary anymore to pass the context to the create rpc operation. Despite nfs4_proc_create apparently being okay with a NULL context it Oopses somewhere down the call chain. So allocate a context here. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* nfs: implement i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | | Replace NFS4 specific ->lookup implementation with ->atomic_open impelementation and use the generic nfs_lookup for other lookups. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> CC: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: add i_op->atomic_open()Miklos Szeredi2012-07-14
| | | | | | | | | | | | | | | | | | | | | | | Add a new inode operation which is called on the last component of an open. Using this the filesystem can look up, possibly create and open the file in one atomic operation. If it cannot perform this (e.g. the file type turned out to be wrong) it may signal this by returning NULL instead of an open struct file pointer. i_op->atomic_open() is only called if the last component is negative or needs lookup. Handling cached positive dentries here doesn't add much value: these can be opened using f_op->open(). If the cached file turns out to be invalid, the open can be retried, this time using ->atomic_open() with a fresh dentry. For now leave the old way of using open intents in lookup and revalidate in place. This will be removed once all the users are converted. David Howells noticed that if ->atomic_open() opens the file but does not create it, handle_truncate() will be called on it even if it is not a regular file. Fix this by checking the file type in this case too. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: lookup_open(): expand lookup_hash()Miklos Szeredi2012-07-14
| | | | | | | | Copy __lookup_hash() into lookup_open(). The next patch will insert the atomic open call just before the real lookup. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: add lookup_open()Miklos Szeredi2012-07-14
| | | | | | | | | | | Split out lookup + maybe create from do_last(). This is the part under i_mutex protection. The function is called lookup_open() and returns a filp even though the open part is not used yet. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): common slow lookupMiklos Szeredi2012-07-14
| | | | | | | | | Make the slow lookup part of O_CREAT and non-O_CREAT opens common. This allows atomic_open to be hooked into the slow lookup part. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): separate O_CREAT specific codeMiklos Szeredi2012-07-14
| | | | | | | | Check O_CREAT on the slow lookup paths where necessary. This allows the rest to be shared with plain open. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: do_last(): inline lookup_slow()Miklos Szeredi2012-07-14
| | | | | | | Copy lookup_slow() into do_last(). Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* namei.c: let follow_link() do put_link() on failureAl Viro2012-07-14
| | | | | | | | | | | | | | no need for kludgy "set cookie to ERR_PTR(...) because we failed before we did actual ->follow_link() and want to suppress put_link()", no pointless check in put_link() itself. Callers checked if follow_link() has failed anyway; might as well break out of their loops if that happened, without bothering to call put_link() first. [AV: folded fixes from hch] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* coda: use list_for_each_entryAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: switch i_dentry/d_alias to hlistAl Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ext4: get rid of open-coded d_find_any_alias()Al Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* ocfs2: use list_for_each_entry in ocfs2_find_local_alias()Al Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* affs: unobfuscate affs_fix_dcache()Al Viro2012-07-14
| | | | | | and add a comment on what it's doing Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* affs: get rid of open-coded list_for_each_entry()Al Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* adfs: don't bother with ->i_dentry in ->destroy_inode()Al Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* cifs: don't bother with ->i_dentry in ->destroy_inode()Al Viro2012-07-14
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* qnx6: don't bother with ->i_dentry in inode-freeing callbackAl Viro2012-07-14
| | | | | | | we'll initialize it in inode_init_always() when we allocate that object again. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of magic in proc_namespace.cAl Viro2012-07-14
| | | | | | | | don't rely on proc_mounts->m being the first field; container_of() is there for purpose. No need to bother with ->private, while we are at it - the same container_of will do nicely. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* get rid of ->mnt_longtermAl Viro2012-07-14
| | | | | | | | | it's enough to set ->mnt_ns of internal vfsmounts to something distinct from all struct mnt_namespace out there; then we can just use the check for ->mnt_ns != NULL in the fast path of mntput_no_expire() Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* fs/direct-io.c: adjust suspicious bit operationJulia Lawall2012-07-14
| | | | | | | | | | | | | READ is 0, so the result of the bit-and operation is 0. Rewrite with == as done elsewhere in the same file. This problem was found using Coccinelle (http://coccinelle.lip6.fr/). Signed-off-by: Julia Lawall <julia@diku.dk> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* affs: get rid of affs_sync_superArtem Bityutskiy2012-07-14
| | | | | | | | | | | | | | | | | | This patch makes affs stop using the VFS '->write_super()' method along with the 's_dirt' superblock flag, because they are on their way out. The whole "superblock write-out" VFS infrastructure is served by the 'sync_supers()' kernel thread, which wakes up every 5 (by default) seconds and writes out all dirty superblocks using the '->write_super()' call-back. But the problem with this thread is that it wastes power by waking up the system every 5 seconds, even if there are no diry superblocks, or there are no client file-systems which would need this (e.g., btrfs does not use '->write_super()'). So we want to kill it completely and thus, we need to make file-systems to stop using the '->write_super()' VFS service, and then remove it together with the kernel thread. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* affs: introduce VFS superblock object back-referenceArtem Bityutskiy2012-07-14
| | | | | | | | | Add an 'sb' VFS superblock back-reference to the 'struct affs_sb_info' data structure - we will need to find the VFS superblock from a 'struct affs_sb_info' object in the next patch, so this change is jut a preparation. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* affs: stop using lock_superArtem Bityutskiy2012-07-14
| | | | | | | | | The VFS's 'lock_super()' and 'unlock_super()' calls are deprecated and unwanted and just wait for a brave knight who'd kill them. This patch makes AFFS stop using them and use the buffer-head's own lock instead. Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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