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* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* Merge branch 'for-next' into for-linusJiri Kosina2010-03-08
|\ | | | | | | | | | | | | | | | | Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c
| * tree-wide: Assorted spelling fixesDaniel Mack2010-02-09
| | | | | | | | | | | | | | | | | | | | | | In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Joe Perches <joe@perches.com> Cc: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | Merge branch 'for-2.6.34' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-03-06
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.34' of git://linux-nfs.org/~bfields/linux: (22 commits) nfsd4: fix minor memory leak svcrpc: treat uid's as unsigned nfsd: ensure sockets are closed on error Revert "sunrpc: move the close processing after do recvfrom method" Revert "sunrpc: fix peername failed on closed listener" sunrpc: remove unnecessary svc_xprt_put NFSD: NFSv4 callback client should use RPC_TASK_SOFTCONN xfs_export_operations.commit_metadata commit_metadata export operation replacing nfsd_sync_dir lockd: don't clear sm_monitored on nsm_reboot_lookup lockd: release reference to nsm_handle in nlm_host_rebooted nfsd: Use vfs_fsync_range() in nfsd_commit NFSD: Create PF_INET6 listener in write_ports SUNRPC: NFS kernel APIs shouldn't return ENOENT for "transport not found" SUNRPC: Bury "#ifdef IPV6" in svc_create_xprt() NFSD: Support AF_INET6 in svc_addsock() function SUNRPC: Use rpc_pton() in ip_map_parse() nfsd: 4.1 has an rfc number nfsd41: Create the recovery entry for the NFSv4.1 client nfsd: use vfs_fsync for non-directories ...
| * \ Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs into for-2.6.34-incomingJ. Bruce Fields2010-03-04
| |\ \ | | | | | | | | | | | | Resolve merge conflict in fs/xfs/linux-2.6/xfs_export.c.
| * | | nfsd4: fix minor memory leakJ. Bruce Fields2010-03-03
| | | | | | | | | | | | | | | | | | | | | | | | There's no need to allocate this cred more than once. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | NFSD: NFSv4 callback client should use RPC_TASK_SOFTCONNChuck Lever2010-02-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The server's callback client should stop trying to connect to the client's callback server as soon as it gets ECONNREFUSED. The NFS server's callback client does not call rpc_ping(), but appears to have it's own "ping" procedure, so it wasn't covered by commit caabea8a. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | commit_metadata export operation replacing nfsd_sync_dirBen Myers2010-02-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add commit_metadata export_operation to allow the underlying filesystem to decide how to commit an inode most efficiently. - Usage of nfsd_sync_dir and write_inode_now has been replaced with the commit_metadata function that takes a svc_fh. - The commit_metadata function calls the commit_metadata export_op if it's there, or else falls back to sync_inode instead of fsync and write_inode_now because only metadata need be synced here. - nfsd4_sync_rec_dir now uses vfs_fsync so that commit_metadata can be static Signed-off-by: Ben Myers <bpm@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | nfsd: Use vfs_fsync_range() in nfsd_commitTrond Myklebust2010-01-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The NFS COMMIT operation allows the client to specify the exact byte range that it wishes to sync to disk in order to optimise server performance. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | NFSD: Create PF_INET6 listener in write_portsChuck Lever2010-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Try to create a PF_INET6 listener for NFSD, if IPv6 is enabled in the kernel. Make sure nfsd_serv's reference count is decreased if __write_ports_addxprt() failed to create a listener. See __write_ports_addfd(). Our current plan is to rely on rpc.nfsd to create appropriate IPv6 listeners when server-side NFS/IPv6 support is desired. Legacy behavior, via the write_threads or write_svc kernel APIs, will remain the same -- only IPv4 listeners are created. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> [bfields@citi.umich.edu: Move error-handling code to end] Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | SUNRPC: NFS kernel APIs shouldn't return ENOENT for "transport not found"Chuck Lever2010-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | write_ports() converts svc_create_xprt()'s ENOENT error return to EPROTONOSUPPORT so that rpc.nfsd (in user space) can report an error message that makes sense. It turns out that several of the other kernel APIs rpc.nfsd use can also return ENOENT from svc_create_xprt(), by way of lockd_up(). On the client side, an NFSv2 or NFSv3 mount request can also return the result of lockd_up(). This error may also be returned during an NFSv4 mount request, since the NFSv4 callback service uses svc_create_xprt() to create the callback listener. An ENOENT error return results in a confusing error message from the mount command. Let's have svc_create_xprt() return EPROTONOSUPPORT instead of ENOENT. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | nfsd41: Create the recovery entry for the NFSv4.1 clientRicardo Labiaga2010-01-14
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | nfsd: use vfs_fsync for non-directoriesChristoph Hellwig2010-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of opencoding the fsync calling sequence use vfs_fsync. This also gets rid of the useless i_mutex over the data writeout. Consolidate the remaining special code for syncing directories and document it's quirks. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | nfsd4: Use FIRST_NFS4_OP in nfsd4_decode_compound()Ricardo Labiaga2010-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we're checking for LAST_NFS4_OP, use FIRST_NFS4_OP to be consistent. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * | | nfsd41: nfsd4_decode_compound() does not recognize all opsRicardo Labiaga2010-01-13
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The server incorrectly assumes that the operations in the array start with value 0. The first operation (OP_ACCESS) has a value of 3, causing the check in nfsd4_decode_compound to be off. Instead of comparing that the operation number is less than the number of elements in the array, the server should verify that it is less than the maximum valid operation number defined by LAST_NFS4_OP. Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | | vfs: take f_lock on modifying f_mode after open timeWu Fengguang2010-03-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We'll introduce FMODE_RANDOM which will be runtime modified. So protect all runtime modification to f_mode with f_lock to avoid races. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: <stable@kernel.org> [2.6.33.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'for_linus' of ↵Linus Torvalds2010-03-05
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6: (33 commits) quota: stop using QUOTA_OK / NO_QUOTA dquot: cleanup dquot initialize routine dquot: move dquot initialization responsibility into the filesystem dquot: cleanup dquot drop routine dquot: move dquot drop responsibility into the filesystem dquot: cleanup dquot transfer routine dquot: move dquot transfer responsibility into the filesystem dquot: cleanup inode allocation / freeing routines dquot: cleanup space allocation / freeing routines ext3: add writepage sanity checks ext3: Truncate allocated blocks if direct IO write fails to update i_size quota: Properly invalidate caches even for filesystems with blocksize < pagesize quota: generalize quota transfer interface quota: sb_quota state flags cleanup jbd: Delay discarding buffers in journal_unmap_buffer ext3: quota_write cross block boundary behaviour quota: drop permission checks from xfs_fs_set_xstate/xfs_fs_set_xquota quota: split out compat_sys_quotactl support from quota.c quota: split out netlink notification support from quota.c quota: remove invalid optimization from quota_sync_all ... Fixed trivial conflicts in fs/namei.c and fs/ufs/inode.c
| * | | dquot: move dquot initialization responsibility into the filesystemChristoph Hellwig2010-03-04
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently various places in the VFS call vfs_dq_init directly. This means we tie the quota code into the VFS. Get rid of that and make the filesystem responsible for the initialization. For most metadata operations this is a straight forward move into the methods, but for truncate and open it's a bit more complicated. For truncate we currently only call vfs_dq_init for the sys_truncate case because open already takes care of it for ftruncate and open(O_TRUNC) - the new code causes an additional vfs_dq_init for those which is harmless. For open the initialization is moved from do_filp_open into the open method, which means it happens slightly earlier now, and only for regular files. The latter is fine because we don't need to initialize it for operations on special files, and we already do it as part of the namespace operations for directories. Add a dquot_file_open helper that filesystems that support generic quotas can use to fill in ->open. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
* | | fix NFS4 handling of mountpoint statAl Viro2010-03-03
| | | | | | | | | | | | | | | | | | | | | RFC says we need to follow the chain of mounts if there's more than one stacked on that point. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Switch may_open() and break_lease() to passing O_...Al Viro2010-03-03
|/ / | | | | | | | | | | ... instead of mixing FMODE_ and O_ Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | vfs: don't call ima_file_check() unconditionally in nfsd_open()Chuck Ebbert2010-02-20
| | | | | | | | | | | | | | | | | | commit 1e41568d7378d1ba8c64ba137b9ddd00b59f893a ("Take ima_path_check() in nfsd past dentry_open() in nfsd_open()") moved this code back to its original location but missed the "else". Signed-off-by: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-02-08
|\ \ | | | | | | | | | | | | * 'for-2.6.33' of git://linux-nfs.org/~bfields/linux: Revert "nfsd4: fix error return when pseudoroot missing"
| * | Revert "nfsd4: fix error return when pseudoroot missing"J. Bruce Fields2010-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f39bde24b275ddc45d fixed the error return from PUTROOTFH in the case where there is no pseudofilesystem. This is really a case we shouldn't hit on a correctly configured server: in the absence of a root filehandle, there's no point accepting version 4 NFS rpc calls at all. But the shared responsibility between kernel and userspace here means the kernel on its own can't eliminate the possiblity of this happening. And we have indeed gotten this wrong in distro's, so new client-side mount code that attempts to negotiate v4 by default first has to work around this case. Therefore when commit f39bde24b275ddc45d arrived at roughly the same time as the new v4-default mount code, which explicitly checked only for the previous error, the result was previously fine mounts suddenly failing. We'll fix both sides for now: revert the error change, and make the client-side mount workaround more robust. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | | ima: rename ima_path_check to ima_file_checkMimi Zohar2010-02-07
| | | | | | | | | | | | | | | | | | | | | | | | ima_path_check actually deals with files! call it ima_file_check instead. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | fix ima breakageMimi Zohar2010-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "Untangling ima mess, part 2 with counters" patch messed up the counters. Based on conversations with Al Viro, this patch streamlines ima_path_check() by removing the counter maintaince. The counters are now updated independently, from measuring the file, in __dentry_open() and alloc_file() by calling ima_counts_get(). ima_path_check() is called from nfsd and do_filp_open(). It also did not measure all files that should have been measured. Reason: ima_path_check() got bogus value passed as mask. [AV: mea culpa] [AV: add missing nfsd bits] Signed-off-by: Mimi Zohar <zohar@us.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Take ima_path_check() in nfsd past dentry_open() in nfsd_open()Al Viro2010-02-07
| |/ |/| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-2.6.33' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2010-01-06
|\| | | | | | | | | | | | | * 'for-2.6.33' of git://linux-nfs.org/~bfields/linux: sunrpc: fix peername failed on closed listener nfsd: make sure data is on disk before calling ->fsync nfsd: fix "insecure" export option
| * nfsd: make sure data is on disk before calling ->fsyncChristoph Hellwig2010-01-06
| | | | | | | | | | | | | | | | | | | | | | nfsd is not using vfs_fsync, so I missed it when changing the calling convention during the 2.6.32 window. This patch fixes it to not only start the data writeout, but also wait for it to complete before calling into ->fsync. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
| * nfsd: fix "insecure" export optionJ. Bruce Fields2009-12-20
| | | | | | | | | | | | | | | | A typo in 12045a6ee9908b "nfsd: let "insecure" flag vary by pseudoflavor" reversed the sense of the "insecure" flag. Reported-by: Michael Guntsche <mike@it-loops.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: fix "insecure" export optionJ. Bruce Fields2009-12-20
| | | | | | | | | | | | | | | | | | A typo in 12045a6ee9908b "nfsd: let "insecure" flag vary by pseudoflavor" reversed the sense of the "insecure" flag. Reported-by: Michael Guntsche <mike@it-loops.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 'master' of ↵Linus Torvalds2009-12-16
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (38 commits) direct I/O fallback sync simplification ocfs: stop using do_sync_mapping_range cleanup blockdev_direct_IO locking make generic_acl slightly more generic sanitize xattr handler prototypes libfs: move EXPORT_SYMBOL for d_alloc_name vfs: force reval of target when following LAST_BIND symlinks (try #7) ima: limit imbalance msg Untangling ima mess, part 3: kill dead code in ima Untangling ima mess, part 2: deal with counters Untangling ima mess, part 1: alloc_file() O_TRUNC open shouldn't fail after file truncation ima: call ima_inode_free ima_inode_free IMA: clean up the IMA counts updating code ima: only insert at inode creation time ima: valid return code from ima_inode_alloc fs: move get_empty_filp() deffinition to internal.h Sanitize exec_permission_lite() Kill cached_lookup() and real_lookup() Kill path_lookup_open() ... Trivial conflicts in fs/direct-io.c
| * Untangling ima mess, part 3: kill dead code in imaAl Viro2009-12-16
| | | | | | | | | | | | | | | | | | | | | | | | | | Kill the 'update' argument of ima_path_check(), kill dead code in ima. Current rules: ima counters are bumped at the same time when the file switches from put_filp() fodder to fput() one. Which happens exactly in two places - alloc_file() and __dentry_open(). Nothing else needs to do that at all. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * Untangling ima mess, part 2: deal with countersAl Viro2009-12-16
| | | | | | | | | | | | | | | | | | * do ima_get_count() in __dentry_open() * stop doing that in followups * move ima_path_check() to right after nameidata_to_filp() * don't bump counters on it Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | nfsd: remove pointless paths in file headersJ. Bruce Fields2009-12-15
| | | | | | | | | | | | | | | | The new .h files have paths at the top that are now out of date. While we're here, just remove all of those from fs/nfsd; they never served any purpose. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: move most of nfsfh.h to fs/nfsdJ. Bruce Fields2009-12-15
| | | | | | | | | | | | Most of this can be trivially moved to a private header as well. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: make V4ROOT exports read-onlyJ. Bruce Fields2009-12-15
| | | | | | | | | | | | I can't see any use for writeable V4ROOT exports. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: restrict filehandles accepted in V4ROOT caseSteve Dickson2009-12-15
| | | | | | | | | | | | | | | | | | | | | | | | | | On V4ROOT exports, only accept filehandles that are the *root* of some export. This allows mountd to allow or deny access to individual directories and symlinks on the pseudofilesystem. Note that the checks in readdir and lookup are not enough, since a malicious host with access to the network could guess filehandles that they weren't able to obtain through lookup or readdir. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: allow exports of symlinksJ. Bruce Fields2009-12-15
| | | | | | | | | | | | | | | | We want to allow exports of symlinks, to allow mountd to communicate to the kernel which symlinks lead to exports, and hence which symlinks need to be visible on the pseudofilesystem. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: filter readdir results in V4ROOT caseJ. Bruce Fields2009-12-15
| | | | | | | | | | | | | | | | | | | | As with lookup, we treat every boject as a mountpoint and pretend it doesn't exist if it isn't exported. The preexisting code here is confusing, but I haven't yet figured out how to make it clearer. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: filter lookup results in V4ROOT caseJ. Bruce Fields2009-12-15
| | | | | | | | | | | | | | We treat every object as a mountpoint and pretend it doesn't exist if it isn't exported. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd4: don't continue "under" mounts in V4ROOT caseJ. Bruce Fields2009-12-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If /A/mount/point/ has filesystem "B" mounted on top of it, and if "A" is exported, but not "B", then the nfs server has always returned to the client a filehandle for the mountpoint, instead of for the root of "B", allowing the client to see the subtree of "A" that would otherwise be hidden by B. Disable this behavior in the case of V4ROOT exports; we implement the path restrictions of V4ROOT exports by treating *every* directory as if it were a mountpoint, and allowing traversal *only* if the new directory is exported. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: introduce export flag for v4 pseudorootSteve Dickson2009-12-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | NFSv4 differs from v2 and v3 in that it presents a single unified filesystem tree, whereas v2 and v3 exported multiple filesystem (whose roots could be found using a separate mount protocol). Our original NFSv4 server implementation asked the administrator to designate a single filesystem as the NFSv4 root, then to mount filesystems they wished to export underneath. (Often using bind mounts of already-existing filesystems.) This was conceptually simple, and allowed easy implementation, but created a serious obstacle to upgrading between v2/v3: since the paths to v4 filesystems were different, administrators would have to adjust all the paths in client-side mount commands when switching to v4. Various workarounds are possible. For example, the administrator could export "/" and designate it as the v4 root. However, the security risks of that approach are obvious, and in any case we shouldn't be requiring the administrator to take extra steps to fix this problem; instead, the server should present consistent paths across different versions by default. These patches take a modified version of that approach: we provide a new export option which exports only a subset of a filesystem. With this flag, it becomes safe for mountd to export "/" by default, with no need for additional configuration. We begin just by defining the new flag. Signed-off-by: Steve Dickson <steved@redhat.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: let "insecure" flag vary by pseudoflavorJ. Bruce Fields2009-12-14
| | | | | | | | | | | | | | | | | | This was an oversight; it should be among the export flags that can be allowed to vary by pseudoflavor. This allows an administrator to (for example) allow auth_sys mounts only from low ports, but allow auth_krb5 mounts to use any port. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: new interface to advertise export featuresJ. Bruce Fields2009-12-14
| | | | | | | | | | | | | | | | | | Soon we will add the new V4ROOT flag, and allow the INSECURE flag to vary by pseudoflavor. It would be useful for nfs-utils (for example, for improved exportfs error reporting) to be able to know when this happens. Use this new interface for that purpose. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: Move private headers to source directoryBoaz Harrosh2009-12-14
| | | | | | | | | | | | | | | | Lots of include/linux/nfsd/* headers are only used by nfsd module. Move them to the source directory Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: Source files #include cleanupsBoaz Harrosh2009-12-14
| | | | | | | | | | | | | | | | | | | | | | Now that the headers are fixed and carry their own wait, all fs/nfsd/ source files can include a minimal set of headers. and still compile just fine. This patch should improve the compilation speed of the nfsd module. Signed-off-by: Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd4: fix share mode permissionsJ. Bruce Fields2009-12-14
| | | | | | | | | | | | | | | | | | | | | | | | | | NFSv4 opens may function as locks denying other NFSv4 users the rights to open a file. We're requiring a user to have write permissions before they can deny write. We're *not* requiring a user to have write permissions to deny read, which is if anything a more drastic denial. What was intended was to require write permissions for DENY_READ. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | nfsd: simplify fh_verify access checksJ. Bruce Fields2009-11-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All nfsd security depends on the security checks in fh_verify, and especially on nfsd_setuser(). It therefore bothers me that the nfsd_setuser call may be made from three different places, depending on whether the filehandle has already been mapped to a dentry, and on whether subtreechecking is in force. Instead, make an unconditional call in fh_verify(), so it's trivial to verify that the call always occurs. That leaves us with a redundant nfsd_setuser() call in the subtreecheck case--it needs the correct user set earlier in order to check execute permissions on the path to this filehandle--but I'm willing to accept that minor inefficiency in the subtreecheck case in return for more straightforward permission checking. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
* | Merge commit 'v2.6.32-rc8' into HEADJ. Bruce Fields2009-11-23
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| * Fix memory corruption caused by nfsd readdir+Petr Vandrovec2009-11-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 8177e6d6dfb9cd03d9bdeb647c32161f8f58f686 ("nfsd: clean up readdirplus encoding") introduced single character typo in nfs3 readdir+ implementation. Unfortunately that typo has quite bad side effects: random memory corruption, followed (on my box) with immediate spontaneous box reboot. Using 'p1' instead of 'p' fixes my Linux box rebooting whenever VMware ESXi box tries to list contents of my home directory. Signed-off-by: Petr Vandrovec <petr@vandrovec.name> Cc: "J. Bruce Fields" <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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