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* Merge branch 'bkl-removal' into nextTrond Myklebust2008-07-157-77/+83
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| * NFSv4: Remove BKL from the nfsv4 state recoveryTrond Myklebust2008-07-151-2/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL from the readdir codeTrond Myklebust2008-07-151-3/+0
| | | | | | | | | | | | | | Page accesses are serialised using the page locks, whereas all attribute updates are serialised using the inode->i_lock. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL from the symlink codeTrond Myklebust2008-07-151-7/+1
| | | | | | | | | | | | | | Page cache accesses are serialised using page locks, whereas attribute updates are serialised using inode->i_lock. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL from the sillydelete operationsTrond Myklebust2008-07-151-6/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove the BKL from the rename, rmdir and unlink operationsTrond Myklebust2008-07-151-6/+3
| | | | | | | | | | | | | | | | Attribute updates are safe, and dentry operations are protected using VFS level locks. Defer removing the BKL from sillyrename until a separate patch. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL from NFS lookup codeTrond Myklebust2008-07-151-8/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | All dentry-related operations are already BKL-safe, since they are protected by the VFS locking. No extra locks should be needed in the NFS code. In the case of nfs_revalidate_inode(), we're only doing an attribute update (protected by the inode->i_lock). In the case of nfs_lookup(), we're instantiating a new dentry, so there should be no contention possible until after we call d_materialise_unique. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove the BKL from nfs_link()Trond Myklebust2008-07-151-2/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove the BKL from the inode creation operationsTrond Myklebust2008-07-151-9/+0
| | | | | | | | | | | | | | nfs_instantiate() does not require the BKL, neither do the attribute updates or the RPC code. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL usage from open()Trond Myklebust2008-07-153-10/+0
| | | | | | | | | | | | | | All the NFSv4 stateful operations are already protected by other locks (in particular by the rpc_sequence locks. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL usage from the write pathTrond Myklebust2008-07-151-2/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove the BKL from the permission checking codeTrond Myklebust2008-07-151-4/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove attribute update related BKL referencesTrond Myklebust2008-07-152-8/+0
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove BKL requirement from attribute updatesTrond Myklebust2008-07-152-11/+71
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main problem is dealing with inode->i_size: we need to set the inode->i_lock on all attribute updates, and so vmtruncate won't cut it. Make an NFS-private version of vmtruncate that has the necessary locking semantics. The result should be that the following inode attribute updates are protected by inode->i_lock nfsi->cache_validity nfsi->read_cache_jiffies nfsi->attrtimeo nfsi->attrtimeo_timestamp nfsi->change_attr nfsi->last_updated nfsi->cache_change_attribute nfsi->access_cache nfsi->access_cache_entry_lru nfsi->access_cache_inode_lru nfsi->acl_access nfsi->acl_default nfsi->nfs_page_tree nfsi->ncommit nfsi->npages nfsi->open_files nfsi->silly_list nfsi->acl nfsi->open_states inode->i_size inode->i_atime inode->i_mtime inode->i_ctime inode->i_nlink inode->i_uid inode->i_gid The following is protected by dir->i_mutex nfsi->cookieverf Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Protect inode->i_nlink updates using inode->i_lockTrond Myklebust2008-07-151-2/+10
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | Merge branch 'devel' into nextTrond Myklebust2008-07-1515-889/+1237
|\ \ | |/ | | | | | | | | | | | | Conflicts: fs/nfs/file.c Fix up the conflict with Jon Corbet's bkl-removal tree
| * NFS: Allow either strict or sloppy mount option parsingChuck Lever2008-07-091-75/+128
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kernel's NFS client mount option parser currently doesn't allow unrecognized or incorrect mount options. This prevents misspellings or incorrectly specified mount options from possibly causing silent data corruption. However, NFS mount options are not standardized, so different operating systems can use differently spelled mount options to support similar features, or can support mount options which no other operating system supports. "Sloppy" mount option parsing, which allows the parser to ignore any option it doesn't recognize, is needed to support automounters that often use maps that are shared between heterogenous operating systems. The legacy mount command ignores the validity of the values of mount options entirely, except for the "sec=" and "proto=" options. If an incorrect value is specified, the out-of-range value is passed to the kernel; if a value is specified that contains non-numeric characters, it appears as though the legacy mount command sets that option to zero (probably incorrect behavior in general). In any case, this sets a precedent which we will partially follow for the kernel mount option parser: + if "sloppy" is not set, the parser will be strict about both unrecognized options (same as legacy) and invalid option values (stricter than legacy) + if "sloppy" is set, the parser will ignore unrecognized options and invalid option values (same as legacy) An "invalid" option value in this case means that either the type (integer, short, or string) or sign (for integer values) of the specified value is incorrect. This patch does two things: it changes the NFS client's mount option parsing loop so that it parses the whole string instead of failing at the first unrecognized option or invalid option value. An unrecognized option or an invalid option value cause the option to be skipped. Then, the patch adds a "sloppy" mount option that allows the parsing to succeed anyway if there were any problems during parsing. When parsing a set of options is complete, if there are errors and "sloppy" was specified, return success anyway. Otherwise, only return success if there are no errors. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS4: Set security flavor default for NFSv4 mounts like other defaultsChuck Lever2008-07-091-16/+6
| | | | | | | | | | | | | | | | | | Set the default security flavor when we set the other mount option default values for NFSv4. This cleans up the NFSv4 mount option parsing path to look like the NFSv2/v3 one. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Set security flavor default for NFSv2/3 mounts like other defaultsChuck Lever2008-07-091-17/+5
| | | | | | | | | | | | | | | | | | Set the default security flavor when we set the other mount option default values. After this change, only the legacy user-space mount path needs to set the NFS_MOUNT_SECFLAVOUR flag. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Refactor logic for parsing NFS security flavor mount optionsChuck Lever2008-07-091-65/+78
| | | | | | | | | | | | | | | | Clean up: Refactor the NFS mount option parsing function to extract the security flavor parsing logic into a separate function. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: use documenting macro constants for initializing ac{reg, dir}{min, max}Chuck Lever2008-07-092-16/+16
| | | | | | | | | | | | | | Clean up. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Move the nfs_set_port() call out of nfs_parse_mount_options()Chuck Lever2008-07-091-3/+6
| | | | | | | | | | | | | | | | | | The remount path does not need to set the port in the server address. Since it's not really a part of option parsing, move the nfs_set_port() call to nfs_parse_mount_options()'s callers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: set transport defaults after mount option parsing is finishedTrond Myklebust2008-07-092-23/+50
| | | | | | | | | | | | | | | | | | | | | | | | Move the UDP/TCP default timeo/retrans settings for text mounts to nfs_init_timeout_values(), which was were they were always being initialised (and sanity checked) for binary mounts. Document the default timeout values using appropriate #defines. Ensure that we initialise and sanity check the transport protocols that may have been specified by the user. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs4: fix potential race with rapid nfs_callback_up/down cycleJeff Layton2008-07-091-14/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If the nfsv4 callback thread is rapidly brought up and down, it's possible that nfs_callback_svc might never get a chance to run. If this happens, the cleanup at thread exit might never occur, throwing the refcounting off and nfs_callback_info in an incorrect state. Move the clean functions into nfs_callback_down. Also change the nfs_callback_info struct to track the svc_rqst rather than svc_serv since we need to know that to call svc_exit_thread. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs4: remove BKL from nfs_callback_up and nfs_callback_downJeff Layton2008-07-091-4/+0
| | | | | | | | | | | | | | The nfs_callback_mutex is sufficient protection. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * nfs: initialize timeout variable in nfs4_proc_setclientid_confirmBenny Halevy2008-07-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gcc (4.3.0) rightfully warns about this: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c: In function ‘nfs4_proc_setclientid_confirm’: /usr0/export/dev/bhalevy/git/linux-pnfs-bh-nfs41/fs/nfs/nfs4proc.c:2936: warning: ‘timeout’ may be used uninitialized in this function nfs4_delay that's passed a pointer to 'timeout' is looking at its value and sets it up to some value in the range: NFS4_POLL_RETRY_MIN..NFS4_POLL_RETRY_MAX if (*timeout <= 0) *timeout = NFS4_POLL_RETRY_MIN; if (*timeout > NFS4_POLL_RETRY_MAX) *timeout = NFS4_POLL_RETRY_MAX; Therefore it will end up set to some sane, though rather indeterministic, value. Signed-off-by: Benny Halevy <bhalevy@panasas.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: handle interface identifiers in incoming IPv6 addressesChuck Lever2008-07-091-1/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support in the kernel NFS client's address parser for interface identifiers. IPv6 link-local addresses require an additional "interface identifier", which is a network device name or an integer that indexes the array of local network interfaces. They are suffixed to the address with a '%'. For example: fe80::215:c5ff:fe3b:e1b2%2 indicates an interface index of 2. Or fe80::215:c5ff:fe3b:e1b2%eth0 indicates that requests should be routed through the eth0 device. Without the interface ID, link-local addresses are not usable for NFS. Both the kernel NFS client mount option parser and the mount.nfs command can take either form. The mount.nfs command always passes the address through getnameinfo(3), which usually re-writes interface indices as device names. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Add string length argument to nfs_parse_server_addressChuck Lever2008-07-091-30/+70
| | | | | | | | | | | | | | | | To make nfs_parse_server_address() more generally useful, allow it to accept input strings that are not terminated with '\0'. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Support raw IPv6 address hostnames during NFS mount operationChuck Lever2008-07-091-8/+82
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Traditionally the mount command has looked for a ":" to separate the server's hostname from the export path in the mounted on device name, like this: mount server:/export /mounted/on/dir The server's hostname is "server" and the export path is "/export". You can also substitute a specific IPv4 network address for the server hostname, like this: mount 192.168.0.55:/export /mounted/on/dir Raw IPv6 addresses present a problem, however, because they look something like this: fe80::200:5aff:fe00:30b Note the use of colons. To get around the presence of colons, copy the Solaris convention used for mounting IPv6 servers by address: wrap a raw IPv6 address with square brackets. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Use common device name parsing logic for NFSv4 and NFSv2/v3Chuck Lever2008-07-091-45/+79
| | | | | | | | | | | | | | | | | | | | | | | | To support passing a raw IPv6 address as a server hostname, we need to expand the logic that handles splitting the passed-in device name into a server hostname and export path Start by pulling device name parsing out of the mount option validation functions and into separate helper functions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix a dependency on CONFIG_NFS_V4 in nfs_remountTrond Myklebust2008-07-091-2/+3
| | | | | | | | | | | | | | | | Fix the 'nfs4_fs_type' undeclared error in nfs_remount when compiling sans NFSv4... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Jeff Layton <jlayton@redhat.com>
| * NFS: Allow redirtying of a completed unstable write.Trond Myklebust2008-07-091-33/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently, if an unstable write completes, we cannot redirty the page in order to reflect a new change in the page data until after we've sent a COMMIT request. This patch allows a page rewrite to proceed without the unnecessary COMMIT step, putting it immediately back onto the dirty page list, undoing the VM unstable write accounting, and removing the NFS_PAGE_TAG_COMMIT tag from the NFS radix tree. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Clean up nfs_update_request()Trond Myklebust2008-07-091-98/+103
| | | | | | | | | | | | | | Simplify the loop in nfs_update_request by moving into a separate function the code that attempts to update an existing cached NFS write. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: missing newline in NFS mount debugging messageChuck Lever2008-07-091-1/+1
| | | | | | | | | | | | | | Clean up. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Treat "intr" and "nointr" options as deprecatedChuck Lever2008-07-091-6/+4
| | | | | | | | | | | | | | | | Clean up: the "intr" and "nointr" mount options were recently retired. Document this in the NFS mount option parser. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Allow any value for the "retry" optionChuck Lever2008-07-091-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | The kernel NFS mount option parser should ignore the retry= mount option since it is meaningful only in user space. Today it expects a number rather than arbitrary text, so it ignores the option if the value is numeric, but chokes if there are other characters in the value. Change it to allow any text (except ",") as its value. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Ensure we zap only the access and acl caches when setting new aclsTrond Myklebust2008-07-094-7/+12
| | | | | | | | | | | | | | ...and ensure that we obey the NFS_INO_INVALID_ACL flag when retrieving the acls. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix a warning in nfs4_async_handle_errorTrond Myklebust2008-07-092-6/+5
| | | | | | | | | | | | | | We're not modifying the nfs_server when we call nfs_inc_server_stats and friends, so allow the compiler to pass 'const' pointers too. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Move fs/nfs/iostat.h to include/linuxChuck Lever2008-07-091-106/+13
| | | | | | | | | | | | | | | | | | | | | | | | The fs/nfs/iostat.h header has definitions that were designed to be exposed to user space. Move these definitions under include/linux so user space can use the definitions in applications that read /proc/self/mountstats. Also address a handful of coding style issues called out by checkpatch.pl in fs/nfs/iostat.h. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Remove the redundant file_open entry from struct nfs_rpc_opsTrond Myklebust2008-07-094-8/+2
| | | | | | | | | | | | | | All instances are set to nfs_open(), so we should just remove the redundant indirection. Ditto for the file_release op Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix the ftruncate() credential problemTrond Myklebust2008-07-094-26/+29
| | | | | | | | | | | | | | ftruncate() access checking is supposed to be performed at open() time, just like reads and writes. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: implement option checking when remounting NFS filesystems (resend)Jeff Layton2008-07-091-0/+76
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When remounting an NFS or NFS4 filesystem, the new NFS options are not respected, yet the remount will still return success. This patch adds a remount_fs sb op for NFS that checks any new nfs mount options against the existing ones and fails the mount if any have changed. This is only implemented for string-based mount options since doing this with binary options isn't really feasible. This is essentially the same as the original patch I sent out, but adds a check to see if the addr= option has changed. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * fs/nfs/nfsroot.c: remove CVS keywordAdrian Bunk2008-07-091-2/+0
| | | | | | | | | | | | | | | | This patch removes a CVS keyword that wasn't updated for a long time from a comment. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Fix trace debugging nits in write.cChuck Lever2008-07-091-13/+14
| | | | | | | | | | | | | | | | | | Clean up: fix a few dprintk messages that still need to show the RPC task ID correctly, and be sure we use the preferred %lld or %llu instead of %Ld or %Lu. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Use NFSDBG_FILE for all fopsChuck Lever2008-07-093-30/+43
| | | | | | | | | | | | | | | | | | Clean up: some fops use NFSDBG_FILE, some use NFSDBG_VFS. Let's use NFSDBG_FILE for all fops, and consistently report file names instead of inode numbers. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Add debugging facility for NFS aopsChuck Lever2008-07-091-2/+27
| | | | | | | | | | | | | | | | Recent work in fs/nfs/file.c neglected to add appropriate trace debugging for the NFS client's address space operations. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make nfs_open methods consistentChuck Lever2008-07-092-2/+9
| | | | | | | | | | | | | | | | Clean up: Report the same debugging info and count function calls the same for files and directories in nfs_opendir() and nfs_file_open(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make nfs_llseek methods consistentChuck Lever2008-07-092-2/+15
| | | | | | | | | | | | | | | | Clean up: Report the same debugging info in nfs_llseek_dir() and nfs_llseek_file(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: Make nfs_fsync methods consistentChuck Lever2008-07-092-6/+9
| | | | | | | | | | | | | | | | Clean up: Report the same debugging info, count function calls the same, and use similar function naming in nfs_fsync_dir() and nfs_fsync(). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| * NFS: do_setlk(): don't flush caches when we have a delegationTrond Myklebust2008-07-091-1/+2
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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