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2011-07-19vfs: fix race in rcu lookup of pruned dentryLinus Torvalds
Don't update *inode in __follow_mount_rcu() until we'd verified that there is mountpoint there. Kudos to Hugh Dickins for catching that one in the first place and eventually figuring out the solution (and catching a braino in the earlier version of patch). Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-19dlm: don't limit active work itemsDavid Teigland
Allow multiple workqueue items (locks with callbacks) to be processed concurrently. There should be no reason not to take advantage of this workqueue feature. Signed-off-by: David Teigland <teigland@redhat.com>
2011-07-18Fix cifs_get_root()Al Viro
Add missing ->i_mutex, convert to lookup_one_len() instead of (broken) open-coded analog, cope with getting something like a//b as relative pathname. Simplify the hell out of it, while we are there... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Reviewed-by: Jeff Layton <jlayton@redhat.com>
2011-07-18evm: imbed evm_inode_post_setattrMimi Zohar
Changing the inode's metadata may require the 'security.evm' extended attribute to be re-calculated and updated. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
2011-07-18evm: evm_inode_post_removexattrMimi Zohar
When an EVM protected extended attribute is removed, update 'security.evm'. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
2011-07-18xattr: define vfs_getxattr_alloc and vfs_xattr_cmpMimi Zohar
vfs_getxattr_alloc() and vfs_xattr_cmp() are two new kernel xattr helper functions. vfs_getxattr_alloc() first allocates memory for the requested xattr and then retrieves it. vfs_xattr_cmp() compares a given value with the contents of an extended attribute. Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: Serge Hallyn <serge.hallyn@ubuntu.com>
2011-07-18security: new security_inode_init_security API adds function callbackMimi Zohar
This patch changes the security_inode_init_security API by adding a filesystem specific callback to write security extended attributes. This change is in preparation for supporting the initialization of multiple LSM xattrs and the EVM xattr. Initially the callback function walks an array of xattrs, writing each xattr separately, but could be optimized to write multiple xattrs at once. For existing security_inode_init_security() calls, which have not yet been converted to use the new callback function, such as those in reiserfs and ocfs2, this patch defines security_old_inode_init_security(). Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
2011-07-18Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: hppfs_lookup(): don't open-code lookup_one_len() hppfs: fix dentry leak cramfs: get_cramfs_inode() returns ERR_PTR() on failure ufs should use d_splice_alias() fix exofs ->get_parent() ceph analog of cifs build_path_from_dentry() race fix cifs: build_path_from_dentry() race fix
2011-07-18nfsd: turn on reply cache for NFSv4J. Bruce Fields
It's sort of ridiculous that we've never had a working reply cache for NFSv4. On the other hand, we may still not: our current reply cache is likely not very good, especially in the TCP case (which is the only case that matters for v4). What we really need here is some serious testing. Anyway, here's a start. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-18nfsd4: call nfsd4_release_compoundargs from pc_releaseJ. Bruce Fields
This simplifies cleanup a bit. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-17ext4: avoid eh_entries overflow before insert extent_idxRobin Dong
If eh_entries is equal to (or greater than) eh_max, the operation of inserting new extent_idx will make number of entries overflow. So check eh_entries before inserting the new extent_idx. Although there is no bug case according the code (function ext4_ext_insert_index is called by ext4_ext_split and ext4_ext_split is called only if the index block has free space), the right logic should be "lookup the capacity before insertion". Signed-off-by: Robin Dong <sanbai@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-17ext4: avoid wasted extent cache lookup if !PUNCH_OUT_EXTRobin Dong
This patch avoids an extraneous lookup of the extent cache in ext4_ext_map_blocks() when the flag EXT4_GET_BLOCKS_PUNCH_OUT_EXT is absent. The existing logic was performing the lookup but not making use of the result. The patch simply reverses the order of evaluation in the condition. Since ext4_ext_in_cache() does not initialize newex on misses, bypassing its invocation does not introduce any new issue in this regard. Signed-off-by: Robin Dong <sanbai@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: Lukas Czerner <lczerner@redhat.com> Reviewed-by: Eric Gouriou <egouriou@google.com>
2011-07-17hppfs_lookup(): don't open-code lookup_one_len()Al Viro
... and it's getting it wrong, too - missing ->d_revalidate() calls when it's dealing with filesystem (procfs) that has non-trivial ->d_revalidate()... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-17hppfs: fix dentry leakAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-17cramfs: get_cramfs_inode() returns ERR_PTR() on failureAl Viro
... and we want to report these failures in ->lookup() anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-17ufs should use d_splice_alias()Al Viro
it's NFS-exportable, so... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-17ext4: remove unneeded parameter to ext4_ext_remove_space()Allison Henderson
This patch removes the extra parameter in ext4_ext_remove_space() which is no longer needed. Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-17fix exofs ->get_parent()Al Viro
NULL is not a possible return value for that method, TYVM... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-17ext4: punch hole optimizations: skip un-needed extent lookupAllison Henderson
This patch optimizes the punch hole operation by skipping the tree walking code that is used by truncate. Since punch hole is done through map blocks, the path to the extent is already known in this function, so we do not need to look it up again. Signed-off-by: Allison Henderson <achender@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-17ext4: ignore a stripe width of 1Dan Ehrenberg
If the stripe width was set to 1, then this patch will ignore that stripe width and ext4 will act as if the stripe width were 0 with respect to optimizing allocations. Signed-off-by: Dan Ehrenberg <dehrenberg@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-17ext4: make the preallocation size be a multiple of stripe sizeDan Ehrenberg
Previously, if a stripe width was provided, then it would be used as the preallocation granularity, with no santiy checking and no way to override this. Now, mb_prealloc_size defaults to the smallest multiple of stripe size that is greater than or equal to the old default mb_prealloc_size, and this can be overridden with the sysfs interface. Signed-off-by: Dan Ehrenberg <dehrenberg@google.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] update cifs to version 1.74 [CIFS] update limit for snprintf in cifs_construct_tcon cifs: Fix signing failure when server mandates signing for NTLMSSP
2011-07-16ceph analog of cifs build_path_from_dentry() race fixAl Viro
... unfortunately, cifs bug got copied. Fix is essentially the same. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-16cifs: build_path_from_dentry() race fixAl Viro
deal with d_move() races properly; rename_lock read-retry loop, rcu_read_lock() held while walking to root, d_lock held over subtraction from namelen and copying the component to stabilize ->d_name. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-07-16ext4: fix compilation with -DDX_DEBUGBernd Schubert
Compilation of ext4/namei.c brought up an error and warning messages when compiled with -DDX_DEBUG Signed-off-by: Bernd Schubert <bernd.schubert@itwm.fraunhofer.de> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2011-07-15pnfs: simplify pnfs files module autoloadingJ. Bruce Fields
Embed the necessary alias into the module rather than waiting for someone to add it to /etc/modprobe.conf Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15nfs: document nfsv4 sillyrename issuesJ. Bruce Fields
Somebody working on this code asked what the deal was with NFSv4, since this comment notes that it's v2/v3's statelessness that requires sillyrename. Shouldn't hurt to document the answer. Signed-off-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15nfsd41: Deny new lock before RECLAIM_COMPLETE doneMi Jinlong
Before nfs41 client's RECLAIM_COMPLETE done, nfs server should deny any new locks or opens. rfc5661: " Whenever a client establishes a new client ID and before it does the first non-reclaim operation that obtains a lock, it MUST send a RECLAIM_COMPLETE with rca_one_fs set to FALSE, even if there are no locks to reclaim. If non-reclaim locking operations are done before the RECLAIM_COMPLETE, an NFS4ERR_GRACE error will be returned. " Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15fs: locks: remove init_onceMiklos Szeredi
From: Miklos Szeredi <mszeredi@suse.cz> Remove SLAB initialization entirely, as suggested by Bruce and Linus. Allocate with __GFP_ZERO instead and only initialize list heads. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15nfsd41: check the size of requestMi Jinlong
Check in SEQUENCE that the request doesn't exceed maxreq_sz for the given session. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15nfsd41: error out when client sets maxreq_sz or maxresp_sz too smallMi Jinlong
According to RFC5661, 18.36.3, "if the client selects a value for ca_maxresponsesize such that a replier on a channel could never send a response,the server SHOULD return NFS4ERR_TOOSMALL in the CREATE_SESSION reply." So, error out when the client sets a maxreq_sz less than the minimum possible SEQUENCE request size, or sets a maxresp_sz less than the minimum possible SEQUENCE reply size. Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15nfsd4: fix file leak on open_downgradeJ. Bruce Fields
Stateid's hold a read reference for a read open, a write reference for a write open, and an additional one of each for each read+write open. The latter wasn't getting put on a downgrade, so something like: open RW open R downgrade to R was resulting in a file leak. Also fix an imbalance in an error path. Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix downgrade/lock logic". Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15nfsd4: remember to put RW access on stateid destructionJ. Bruce Fields
Without this, for example, open read open read+write close will result in a struct file leak. Regression from 7d94784293096c0a46897acdb83be5abd9278ece "nfsd4: fix downgrade/lock logic". Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15NFSD: Added TEST_STATEID operationBryan Schumaker
This operation is used by the client to check the validity of a list of stateids. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15NFSD: added FREE_STATEID operationBryan Schumaker
This operation is used by the client to tell the server to free a stateid. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15nfsd: Remove deprecated nfsctl system call and related code.NeilBrown
As promised in feature-removal-schedule.txt it is time to remove the nfsctl system call. Userspace has perferred to not use this call throughout 2.6 and it has been excluded in the default configuration since 2.6.36 (9 months ago). So this patch removes all the code that was being compiled out. There are still references to sys_nfsctl in various arch systemcall tables and related code. These should be cleaned out too, probably in the next merge window. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15NFSD: allow OP_DESTROY_CLIENTID to be only op in COMPOUNDBenny Halevy
DESTROY_CLIENTID MAY be preceded with a SEQUENCE operation as long as the client ID derived from the session ID of SEQUENCE is not the same as the client ID to be destroyed. If the client IDs are the same, then the server MUST return NFS4ERR_CLIENTID_BUSY. (that's not implemented yet) If DESTROY_CLIENTID is not prefixed by SEQUENCE, it MUST be the only operation in the COMPOUND request (otherwise, the server MUST return NFS4ERR_NOT_ONLY_OP). This fixes the error return; before, we returned NFS4ERR_OP_NOT_IN_SESSION; after this patch, we return NFS4ERR_NOTSUPP. Signed-off-by: Benny Halevy <benny@tonian.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2011-07-15dlm: use workqueue for callbacksDavid Teigland
Instead of creating our own kthread (dlm_astd) to deliver callbacks for all lockspaces, use a per-lockspace workqueue to deliver the callbacks. This eliminates complications and slowdowns from many lockspaces sharing the same thread. Signed-off-by: David Teigland <teigland@redhat.com>
2011-07-15Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: fix loop checks in d_materialise_unique() Fix ->d_lock locking order in unlazy_walk()
2011-07-15NFS: Convert nfs4_set_ds_client to EXPORT_SYMBOL_GPLTrond Myklebust
This is not part of an external ABI... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15SUNRPC: sunrpc should not explicitly depend on NFS config optionsTrond Myklebust
Change explicit references to CONFIG_NFS_V4_1 to implicit ones Get rid of the unnecessary defines in backchannel_rqst.c and bc_svc.c: the Makefile takes care of those dependency. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Clean up - simplify the switch to read/write-through-MDSTrond Myklebust
Use nfs_pageio_reset_read_mds and nfs_pageio_reset_write_mds instead of completely reinitialising the struct nfs_pageio_descriptor. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Move the pnfs write code into pnfs.cTrond Myklebust
...and ensure that we recoalese to take into account differences in differences in block sizes when falling back to write through the MDS. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Move the pnfs read code into pnfs.cTrond Myklebust
...and ensure that we recoalese to take into account differences in block sizes when falling back to read through the MDS. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Allow the nfs_pageio_descriptor to signal that a re-coalesce is neededTrond Myklebust
If an attempt to do pNFS fails, and we have to fall back to writing through the MDS, then we may want to re-coalesce the requests that we already have since the block size for the MDS read/writes may be different to that of the DS read/writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Use the nfs_pageio_descriptor->pg_bsize in the read/write requestTrond Myklebust
Instead of looking up the rsize and wsize, the routines that generate the RPC requests should really be using the pg_bsize, since that is what we use when deciding whether or not to coalesce write requests... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Cache rpc_ops in struct nfs_pageio_descriptorTrond Myklebust
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: Clean up: split out the RPC transmission from nfs_pagein_multi/oneTrond Myklebust
...and do the same for nfs_flush_multi/one. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15NFS: fix return value of nfs_pagein_one/nfs_flush_onePeng Tao
Signed-off-by: Peng Tao <peng_tao@emc.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2011-07-15GFS2: combine duplicated block freeing routinesEric Sandeen
__gfs2_free_data and __gfs2_free_meta are almost identical, and can be trivially combined. [This is as per Eric's original patch minus gfs2_free_data() which had no callers left and plus the conversion of the bmap.c calls to these functions. All in all, a nice clean up] Signed-off-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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