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* NFS: Make read() return an ESTALE if the file has been deletedTrond Myklebust2006-09-221-3/+16
| | | | | | | | | | | Currently, a read() request will return EIO even if the file has been deleted on the server, simply because that is what the VM will return if the call to readpage() fails to update the page. Ensure that readpage() marks the inode as stale if it receives an ESTALE. Then return that error to userland. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: It's perfectly legal for clp to be NULL here....J. Bruce Fields2006-09-221-1/+1
| | | | | Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: nfs_lookup - don't hash dentry when optimising away the lookupTrond Myklebust2006-09-221-3/+11
| | | | | | | | | | | | | | | | If the open intents tell us that a given lookup is going to result in a, exclusive create, we currently optimize away the lookup call itself. The reason is that the lookup would not be atomic with the create RPC call, so why do it in the first place? A problem occurs, however, if the VFS aborts the exclusive create operation after the lookup, but before the call to create the file/directory: in this case we will end up with a hashed negative dentry in the dcache that has never been looked up. Fix this by only actually hashing the dentry once the create operation has been successfully completed. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Fix a referral error Oopsandros@citi.umich.edu2006-09-221-0/+2
| | | | | | | | Fix an oops when the referral server is not responding. Check the error return from nfs4_set_client() in nfs4_create_referral_server. Signed-off-by: Andy Adamson <andros@citi.umich.edu> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: NFS_ROOT should use the new rpc_create APIChuck Lever2006-09-221-16/+13
| | | | | | | | | | | Teach NFS_ROOT to use the new rpc_create API instead of the old two-call API for creating an RPC transport. Test plan: Compile the kernel with the NFS client build-in, and set CONFIG_NFS_ROOT. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix up compiler warnings on 64-bit platforms in client.cDavid Howells2006-09-221-6/+14
| | | | | | | Fix up warnings from compiling on ppc64. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* SUNRPC: Make rpc_mkpipe() take the parent dentry as an argumentTrond Myklebust2006-09-221-5/+1
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix a use-after-free issue with the nfs server.Trond Myklebust2006-09-223-18/+27
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Add a real API for dealing with blk_congestion_wait()Trond Myklebust2006-09-221-0/+1
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Use cached page as buffer for NFS symlink requestsChuck Lever2006-09-227-35/+49
| | | | | | | | | | | Now that we have a copy of the symlink path in the page cache, we can pass a struct page down to the XDR routines instead of a string buffer. Test plan: Connectathon, all NFS versions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: copy symlinks into page cache before sending NFS SYMLINK requestChuck Lever2006-09-221-18/+68
| | | | | | | | | | | | | Currently the NFS client does not cache symlinks it creates. They get cached only when the NFS client reads them back from the server. Copy the symlink into the page cache before sending it. Test plan: Connectathon, all NFS versions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix double d_drop in nfs_instantiate() error pathChuck Lever2006-09-224-45/+57
| | | | | | | | | | | | | | | | | | | If the LOOKUP or GETATTR in nfs_instantiate fail, nfs_instantiate will do a d_drop before returning. But some callers already do a d_drop in the case of an error return. Make certain we do only one d_drop in all error paths. This issue was introduced because over time, the symlink proc API diverged slightly from the create/mkdir/mknod proc API. To prevent other coding mistakes of this type, change the symlink proc API to be more like create/mkdir/mknod and move the nfs_instantiate call into the symlink proc routines so it is used in exactly the same way for create, mkdir, mknod, and symlink. Test plan: Connectathon, all versions of NFS. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: remove a no-longer-needed error check in nfs_symlink()Chuck Lever2006-09-221-6/+2
| | | | | | | | | | | | | | | | | In the early days of NFS, there was no duplicate reply cache on the server. Thus retransmitted non-idempotent requests often found that the request had already completed on the server. To avoid passing an unanticipated return code to unsuspecting applications, NFS clients would often shunt error codes that implied the request had been retried but already completed. Thanks to NFS over TCP, duplicate reply caches on the server, and network performance and reliability improvements, it is safe to remove such checks. Test plan: None. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Convert NFS client to use new rpc_create() APIChuck Lever2006-09-221-16/+11
| | | | | | | | | | | Convert NFS client mount logic to use rpc_create() instead of the old xprt_create_proto/rpc_create_client API. Test plan: Mount stress tests. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* SUNRPC: remove extraneous header inclusionsChuck Lever2006-09-221-1/+0
| | | | | | | | | | | | include/linux/sunrpc/clnt.h already includes include/linux/sunrpc/xprt.h. We can remove xprt.h from source files that already include clnt.h. Likewise include/linux/sunrpc/timer.h. Test plan: Compile kernel with CONFIG_NFS enabled. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix nfs_alloc_client()Trond Myklebust2006-09-221-5/+5
| | | | | | | The scheme to indicate which services have been started up appears to be seriously broken. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Ensure NFSv2/v3 mounts respect the NFS_MOUNT_SECFLAVOUR flagTrond Myklebust2006-09-221-2/+4
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Secure the roots of the NFS subtrees in a shared superblockDavid Howells2006-09-221-0/+5
| | | | | | | | | | Invoke security_d_instantiate() on root dentries after allocating them with dentry_alloc_anon(). Normally dentry_alloc_root() would do that, but we don't call that as we don't want to assign a name to the root dentry at this point (we may discover the real name later). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix error handlingDavid Howells2006-09-221-0/+3
| | | | | | | | Fix an error handling problem: nfs_put_client() can be given a NULL pointer if nfs_free_server() is asked to destroy a partially initialised record. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add server and volume lists to /procDavid Howells2006-09-223-0/+303
| | | | | | | | | | | | | | Make two new proc files available: /proc/fs/nfsfs/servers /proc/fs/nfsfs/volumes The first lists the servers with which we are currently dealing (struct nfs_client), and the second lists the volumes we have on those servers (struct nfs_server). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Share NFS superblocks per-protocol per-server per-FSIDDavid Howells2006-09-2217-944/+1646
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The attached patch makes NFS share superblocks between mounts from the same server and FSID over the same protocol. It does this by creating each superblock with a false root and returning the real root dentry in the vfsmount presented by get_sb(). The root dentry set starts off as an anonymous dentry if we don't already have the dentry for its inode, otherwise it simply returns the dentry we already have. We may thus end up with several trees of dentries in the superblock, and if at some later point one of anonymous tree roots is discovered by normal filesystem activity to be located in another tree within the superblock, the anonymous root is named and materialises attached to the second tree at the appropriate point. Why do it this way? Why not pass an extra argument to the mount() syscall to indicate the subpath and then pathwalk from the server root to the desired directory? You can't guarantee this will work for two reasons: (1) The root and intervening nodes may not be accessible to the client. With NFS2 and NFS3, for instance, mountd is called on the server to get the filehandle for the tip of a path. mountd won't give us handles for anything we don't have permission to access, and so we can't set up NFS inodes for such nodes, and so can't easily set up dentries (we'd have to have ghost inodes or something). With this patch we don't actually create dentries until we get handles from the server that we can use to set up their inodes, and we don't actually bind them into the tree until we know for sure where they go. (2) Inaccessible symbolic links. If we're asked to mount two exports from the server, eg: mount warthog:/warthog/aaa/xxx /mmm mount warthog:/warthog/bbb/yyy /nnn We may not be able to access anything nearer the root than xxx and yyy, but we may find out later that /mmm/www/yyy, say, is actually the same directory as the one mounted on /nnn. What we might then find out, for example, is that /warthog/bbb was actually a symbolic link to /warthog/aaa/xxx/www, but we can't actually determine that by talking to the server until /warthog is made available by NFS. This would lead to having constructed an errneous dentry tree which we can't easily fix. We can end up with a dentry marked as a directory when it should actually be a symlink, or we could end up with an apparently hardlinked directory. With this patch we need not make assumptions about the type of a dentry for which we can't retrieve information, nor need we assume we know its place in the grand scheme of things until we actually see that place. This patch reduces the possibility of aliasing in the inode and page caches for inodes that may be accessed by more than one NFS export. It also reduces the number of superblocks required for NFS where there are many NFS exports being used from a server (home directory server + autofs for example). This in turn makes it simpler to do local caching of network filesystems, as it can then be guaranteed that there won't be links from multiple inodes in separate superblocks to the same cache file. Obviously, cache aliasing between different levels of NFS protocol could still be a problem, but at least that gives us another key to use when indexing the cache. This patch makes the following changes: (1) The server record construction/destruction has been abstracted out into its own set of functions to make things easier to get right. These have been moved into fs/nfs/client.c. All the code in fs/nfs/client.c has to do with the management of connections to servers, and doesn't touch superblocks in any way; the remaining code in fs/nfs/super.c has to do with VFS superblock management. (2) The sequence of events undertaken by NFS mount is now reordered: (a) A volume representation (struct nfs_server) is allocated. (b) A server representation (struct nfs_client) is acquired. This may be allocated or shared, and is keyed on server address, port and NFS version. (c) If allocated, the client representation is initialised. The state member variable of nfs_client is used to prevent a race during initialisation from two mounts. (d) For NFS4 a simple pathwalk is performed, walking from FH to FH to find the root filehandle for the mount (fs/nfs/getroot.c). For NFS2/3 we are given the root FH in advance. (e) The volume FSID is probed for on the root FH. (f) The volume representation is initialised from the FSINFO record retrieved on the root FH. (g) sget() is called to acquire a superblock. This may be allocated or shared, keyed on client pointer and FSID. (h) If allocated, the superblock is initialised. (i) If the superblock is shared, then the new nfs_server record is discarded. (j) The root dentry for this mount is looked up from the root FH. (k) The root dentry for this mount is assigned to the vfsmount. (3) nfs_readdir_lookup() creates dentries for each of the entries readdir() returns; this function now attaches disconnected trees from alternate roots that happen to be discovered attached to a directory being read (in the same way nfs_lookup() is made to do for lookup ops). The new d_materialise_unique() function is now used to do this, thus permitting the whole thing to be done under one set of locks, and thus avoiding any race between mount and lookup operations on the same directory. (4) The client management code uses a new debug facility: NFSDBG_CLIENT which is set by echoing 1024 to /proc/net/sunrpc/nfs_debug. (5) Clone mounts are now called xdev mounts. (6) Use the dentry passed to the statfs() op as the handle for retrieving fs statistics rather than the root dentry of the superblock (which is now a dummy). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Start rpciod in server common managementDavid Howells2006-09-221-25/+6
| | | | | | | | | Start rpciod in the server common (nfs_client struct) management code rather than in the superblock management code. This means we only need to "start" it once per server instead of once per superblock. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Eliminate client_sys in favour of cl_rpcclientDavid Howells2006-09-225-176/+177
| | | | | | | | | | | | | | | | | | | Eliminate nfs_server::client_sys in favour of nfs_client::cl_rpcclient as we only really need one per server that we're talking to since it doesn't have any security on it. The retransmission management variables are also moved to the common struct as they're required to set up the cl_rpcclient connection. The NFS2/3 client and client_acl connections are thenceforth derived by cloning the cl_rpcclient connection and post-applying the authorisation flavour. The code for setting up the initial common connection has been moved to client.c as nfs_create_rpc_client(). All the NFS program definition tables are also moved there as that's where they're now required rather than super.c. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Move rpc_ops from nfs_server to nfs_clientDavid Howells2006-09-225-32/+41
| | | | | | | | Move the rpc_ops from the nfs_server struct to the nfs_client struct as they're common to all server records of a particular NFS protocol version. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Make better use of inode* dereferencing macrosDavid Howells2006-09-222-6/+6
| | | | | | | | Make better use of inode* dereferencing macros to hide dereferencing chains (including NFS_PROTO and NFS_CLIENT). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Maintain a common server record for NFS2/3 as well as for NFS4David Howells2006-09-221-1/+20
| | | | | | | | Maintain a common server record for NFS2/3 as well as for NFS4 so that common stuff can be moved there from struct nfs_server. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add extra const qualifiersDavid Howells2006-09-226-13/+14
| | | | | | | Add some extra const qualifiers into NFS. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Use the dentry superblock directly in nfs_statfs()David Howells2006-09-221-7/+6
| | | | | | | | | Use the nominated dentry's superblock directly in the NFS statfs() op to get a file handle, rather than using s_root (which will become a dummy dentry in a future patch). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Generalise the nfs_client structureDavid Howells2006-09-2210-222/+364
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalise the nfs_client structure by: (1) Moving nfs_client to a more general place (nfs_fs_sb.h). (2) Renaming its maintenance routines to be non-NFS4 specific. (3) Move those maintenance routines to a new non-NFS4 specific file (client.c) and move the declarations to internal.h. (4) Make nfs_find/get_client() take a full sockaddr_in to include the port number (will be required for NFS2/3). (5) Make nfs_find/get_client() take the NFS protocol version (again will be required to differentiate NFS2, 3 & 4 client records). Also: (6) Make nfs_client construction proceed akin to inodes, marking them as under construction and providing a function to indicate completion. (7) Make nfs_get_client() wait interruptibly if it finds a client that it can share, but that client is currently being constructed. (8) Make nfs4_create_client() use (6) and (7) instead of locking cl_sem. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a server capabilities NFS RPC opDavid Howells2006-09-221-0/+1
| | | | | | | Add a set_capabilities NFS RPC op so that the server capabilities can be set. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a lookupfh NFS RPC opDavid Howells2006-09-221-0/+47
| | | | | | | | | Add a lookup filehandle NFS RPC op so that a file handle can be looked up without requiring dentries and inodes and other VFS stuff when doing an NFS4 pathwalk during mounting. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Return an error when starting the idmapping pipeDavid Howells2006-09-222-5/+10
| | | | | | | | Return an error when starting the idmapping pipe so that we can detect it failing. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Rename nfs_server::nfs4_stateDavid Howells2006-09-226-33/+33
| | | | | | | | Rename nfs_server::nfs4_state to nfs_client as it will be used to represent the client state for NFS2 and NFS3 also. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Rename struct nfs4_client to struct nfs_clientDavid Howells2006-09-2211-97/+97
| | | | | | | | Rename struct nfs4_client to struct nfs_client so that it can become the basis for a general client record for NFS2 and NFS3 in addition to NFS4. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix NFS4 callback up/down prototypesDavid Howells2006-09-222-5/+7
| | | | | | | | | Make the nfs_callback_up()/down() prototypes just do nothing if NFS4 is not enabled. Also make the down function void type since we can't really do anything if it fails. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Disambiguate nfs_stat_to_errno()David Howells2006-09-221-7/+7
| | | | | | | | Rename the NFS4 version of nfs_stat_to_errno() so that it doesn't conflict with the common one used by NFS2 and NFS3. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix up split of fs/nfs/inode.cDavid Howells2006-09-224-42/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | Fix ups for the splitting of the superblock stuff out of fs/nfs/inode.c, including: (*) Move the callback tcpport module param into callback.c. (*) Move the idmap cache timeout module param into idmap.c. (*) Changes to internal.h: (*) namespace-nfs4.c was renamed to nfs4namespace.c. (*) nfs_stat_to_errno() is in nfs2xdr.c, not nfs4xdr.c. (*) nfs4xdr.c is contingent on CONFIG_NFS_V4. (*) nfs4_path() is only uses if CONFIG_NFS_V4 is set. Plus also: (*) The sec_flavours[] table should really be const. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add an ACCESS cache memory shrinkerTrond Myklebust2006-09-223-0/+52
| | | | | | | | | | | A pinned inode may in theory end up filling memory with cached ACCESS calls. This patch ensures that the VM may shrink away the cache in these particular cases. The shrinker works by iterating through the list of inodes on the global nfs_access_lru_list, and removing the least recently used access cache entry until it is done (or until the entire cache is empty). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a global LRU list for the ACCESS cacheTrond Myklebust2006-09-222-1/+36
| | | | | | ...in order to allow the addition of a memory shrinker. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Add a new ACCESS rpc call cache to the linux nfs clientTrond Myklebust2006-09-222-26/+120
| | | | | | | | | | | The current access cache only allows one entry at a time to be cached for each inode. Add a per-inode red-black tree in order to allow more than one to be cached at a time. Should significantly cut down the time spent in path traversal for shared directories such as ${PATH}, /usr/share, etc. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix nfs_page use after free issues in fs/nfs/write.cTrond Myklebust2006-09-191-2/+2
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: Fix incorrect semaphore release in _nfs4_do_open()Trond Myklebust2006-09-191-3/+3
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix Oopsable condition in nfs_readpage_sync()Trond Myklebust2006-09-191-2/+4
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* [PATCH] NFS: large non-page-aligned direct I/O clobbers memoryTrond Myklebust2006-09-083-69/+42
| | | | | | | | | | | | | | | | | The logic in nfs_direct_read_schedule and nfs_direct_write_schedule can allow data->npages to be one larger than rpages. This causes a page pointer to be written beyond the end of the pagevec in nfs_read_data (or nfs_write_data). Fix this by making nfs_(read|write)_alloc() calculate the size of the pagevec array, and initialise data->npages. Also get rid of the redundant argument to nfs_commit_alloc(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* NFSv4: Add v4 exception handling for the ACL functions.Trond Myklebust2006-08-241-2/+27
| | | | | | | | | This is needed in order to handle any NFS4ERR_DELAY errors that might be returned by the server. It also ensures that we map the NFSv4 errors before they are returned to userland. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 71c12b3f0abc7501f6ed231a6d17bc9c05a238dc commit)
* NFS: Check lengths more thoroughly in NFS4 readdir XDR decodeDavid Howells2006-08-241-10/+11
| | | | | | | | | | | | | | | | | | | Check the bounds of length specifiers more thoroughly in the XDR decoding of NFS4 readdir reply data. Currently, if the server returns a bitmap or attr length that causes the current decode point pointer to wrap, this could go undetected (consider a small "negative" length on a 32-bit machine). Also add a check into the main XDR decode handler to make sure that the amount of data is a multiple of four bytes (as specified by RFC-1014). This makes sure that we can do u32* pointer subtraction in the NFS client without risking an undefined result (the result is undefined if the pointers are not correctly aligned with respect to one another). Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 5861fddd64a7eaf7e8b1a9997455a24e7f688092 commit)
* NFS: Fix issue with EIO on NFS readTrond Myklebust2006-08-241-8/+15
| | | | | | | | | | The problem is that we may be caching writes that would extend the file and create a hole in the region that we are reading. In this case, we need to detect the eof from the server, ensure that we zero out the pages that are part of the hole and mark them as up to date. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 856b603b01b99146918c093969b6cb1b1b0f1c01 commit)
* SUNRPC: Fix dentry refcounting issues with users of rpc_pipefsTrond Myklebust2006-08-241-1/+0
| | | | | | | rpc_unlink() and rpc_rmdir() will dput the dentry reference for you. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from a05a57effa71a1f67ccbfc52335c10c8b85f3f6a commit)
* SUNRPC: make rpc_unlink() take a dentry argument instead of a pathTrond Myklebust2006-08-241-2/+1
| | | | | Signe-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 88bf6d811b01a4be7fd507d18bf5f1c527989089 commit)
* NFS: Fix a potential deadlock in nfs_release_pageNikita Danilov2006-08-241-1/+7
| | | | | | | | | | | nfs_wb_page() waits on request completion and, as a result, is not safe to be called from nfs_release_page() invoked by VM scanner as part of GFP_NOFS allocation. Fix possible deadlock by analyzing gfp mask and refusing to release page if __GFP_FS is not set. Signed-off-by: Nikita Danilov <danilov@gmail.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> (cherry picked from 374d969debfb290bafcb41d28918dc6f7e43ce31 commit)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 09:23:55 +0000