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* NFS: Assume eof if the server returns no readdir recordsTrond Myklebust2010-11-221-3/+7
| | | | | | Some servers are known to be buggy w.r.t. this. Deal with them... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: Ignore kmemleak false positive in nfs_readdir_make_qstrCatalin Marinas2010-11-161-0/+6
| | | | | | | | | | | | | Strings allocated via kmemdup() in nfs_readdir_make_qstr() are referenced from the nfs_cache_array which is stored in a page cache page. Kmemleak does not scan such pages and it reports several false positives. This patch annotates the string->name pointer so that kmemleak does not consider it a real leak. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Bryan Schumaker <bjschuma@netapp.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: readdir shouldn't read beyond the reply returned by the serverTrond Myklebust2010-11-151-1/+3
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix a couple of regressions in readdir.Trond Myklebust2010-11-151-34/+56
| | | | | | | | | | Fix up the issue that array->eof_index needs to be able to be set even if array->size == 0. Ensure that we catch all important memory allocation error conditions and/or kmap() failures. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Revert "NFSv4: Fall back to ordinary lookup if nfs4_atomic_open() returns ↵Trond Myklebust2010-11-151-1/+1
| | | | | | | | | | | EISDIR" This reverts commit 80e60639f1b7c121a7fea53920c5a4b94009361a. This change requires further fixes to ensure that the open doesn't succeed if the lookup later results in a regular file being created. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2010-10-261-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (52 commits) split invalidate_inodes() fs: skip I_FREEING inodes in writeback_sb_inodes fs: fold invalidate_list into invalidate_inodes fs: do not drop inode_lock in dispose_list fs: inode split IO and LRU lists fs: switch bdev inode bdi's correctly fs: fix buffer invalidation in invalidate_list fsnotify: use dget_parent smbfs: use dget_parent exportfs: use dget_parent fs: use RCU read side protection in d_validate fs: clean up dentry lru modification fs: split __shrink_dcache_sb fs: improve DCACHE_REFERENCED usage fs: use percpu counter for nr_dentry and nr_dentry_unused fs: simplify __d_free fs: take dcache_lock inside __d_path fs: do not assign default i_ino in new_inode fs: introduce a per-cpu last_ino allocator new helper: ihold() ...
| * new helper: ihold()Al Viro2010-10-251-1/+1
| | | | | | | | | | | | Clones an existing reference to inode; caller must already hold one. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | NFS: Ensure we check all allocation return values in new readdir codeTrond Myklebust2010-10-231-24/+37
| | | | | | | | | | | | Also some clean ups. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Readdir plus in v4Bryan Schumaker2010-10-231-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | By requsting more attributes during a readdir, we can mimic the readdir plus operation that was in NFSv3. To test, I ran the command `ls -lU --color=none` on directories with various numbers of files. Without readdir plus, I see this: n files | 100 | 1,000 | 10,000 | 100,000 | 1,000,000 --------+-----------+-----------+-----------+-----------+---------- real | 0m00.153s | 0m00.589s | 0m05.601s | 0m56.691s | 9m59.128s user | 0m00.007s | 0m00.007s | 0m00.077s | 0m00.703s | 0m06.800s sys | 0m00.010s | 0m00.070s | 0m00.633s | 0m06.423s | 1m10.005s access | 3 | 1 | 1 | 4 | 31 getattr | 2 | 1 | 1 | 1 | 1 lookup | 104 | 1,003 | 10,003 | 100,003 | 1,000,003 readdir | 2 | 16 | 158 | 1,575 | 15,749 total | 111 | 1,021 | 10,163 | 101,583 | 1,015,784 With readdir plus enabled, I see this: n files | 100 | 1,000 | 10,000 | 100,000 | 1,000,000 --------+-----------+-----------+-----------+-----------+---------- real | 0m00.115s | 0m00.206s | 0m01.079s | 0m12.521s | 2m07.528s user | 0m00.003s | 0m00.003s | 0m00.040s | 0m00.290s | 0m03.296s sys | 0m00.007s | 0m00.020s | 0m00.120s | 0m01.357s | 0m17.556s access | 3 | 1 | 1 | 1 | 7 getattr | 2 | 1 | 1 | 1 | 1 lookup | 4 | 3 | 3 | 3 | 3 readdir | 6 | 62 | 630 | 6,300 | 62,993 total | 15 | 67 | 635 | 6,305 | 63,004 Readdir plus disabled has about a 16x increase in the number of rpc calls and is 4 - 5 times slower on large directories. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: check xdr_decode for errorsBryan Schumaker2010-10-231-1/+15
| | | | | | | | | | | | | | | | | | | | Check if the decoded entry has the eof bit set when returning from xdr_decode with an error. If it does, we should set the eof bits in the array before returning. This should keep us from looping when we expect more data but the server doesn't give us anything new. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: nfs_readdir_filler catch all errorsBryan Schumaker2010-10-231-1/+1
| | | | | | | | | | | | | | Check for all errors, not a specific one. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: readdir with vmapped pagesBryan Schumaker2010-10-231-12/+54
| | | | | | | | | | | | | | | | | | We can use vmapped pages to read more information from the network at once. This will reduce the number of calls needed to complete a readdir. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> [trondmy: Added #include for linux/vmalloc.h> in fs/nfs/dir.c] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: decode_dirent should use an xdr_streamBryan Schumaker2010-10-231-8/+21
| | | | | | | | | | | | | | | | Convert nfs*xdr.c to use an xdr stream in decode_dirent. This will prevent a kernel oops that has been occuring when reading a vmapped page. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: re-add readdir plusBryan Schumaker2010-10-231-0/+67
| | | | | | | | | | | | | | This patch adds readdir plus support to the cache array. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Optimise the readdir searchesTrond Myklebust2010-10-231-4/+2
| | | | | | | | | | | | | | | | | | If we're going through the loop in nfs_readdir() more than once, we usually do not want to restart searching from the beginning of the pages cache. We only want to do that if the previous search failed... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: add readdir cache arrayBryan Schumaker2010-10-231-323/+309
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the readdir cache array and functions to retreive the array stored on a cache page, clear the array by freeing allocated memory, add an entry to the array, and search the array for a given cookie. It then modifies readdir to make use of the new cache array. With the new cache array method, we no longer need some of this code. Finally, nfs_llseek_dir() will set file->f_pos to a value greater than 0 and desc->dir_cookie to zero. When we see this, readdir needs to find the file at position file->f_pos from the start of the directory. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Don't ignore the error return codes from nfs_intent_set_fileTrond Myklebust2010-10-231-12/+23
| | | | | | | | | | | | | | | | | | If nfs_intent_set_file() returns an error, we usually want to pass that back up the stack. Also ensure that nfs_open_revalidate() returns '1' on success. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: We must use list_for_each_entry_safe in nfs_access_cache_shrinkerTrond Myklebust2010-09-291-2/+2
| | | | | | | | | | | | We may end up removing the current entry from nfs_access_lru_list. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs: move nfs_sillyrename to unlink.cJeff Layton2010-09-171-70/+0
| | | | | | | | | | | | | | | | | | | | | | ...since that's where most of the sillyrenaming code lives. A comment block is added to the beginning as well to clarify how sillyrenaming works. Also, make nfs_async_unlink static as nfs_sillyrename is the only caller. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Add an 'open_context' element to struct nfs_rpc_opsTrond Myklebust2010-09-171-3/+4
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFS: Clean up nfs4_proc_create()Trond Myklebust2010-09-171-6/+41
| | | | | | | | | | | | | | | | Remove all remaining references to the struct nameidata from the low level NFS layers. Again pass down a partially initialised struct nfs_open_context when we want to do atomic open+create. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Further cleanups for nfs4_open_revalidate()Trond Myklebust2010-09-171-6/+26
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Clean up nfs4_open_revalidateTrond Myklebust2010-09-171-1/+10
| | | | | | | | | | | | | | | | Remove references to 'struct nameidata' from the low-level open_revalidate code, and replace them with a struct nfs_open_context which will be correctly initialised upon success. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Further minor cleanups for nfs4_atomic_open()Trond Myklebust2010-09-171-6/+15
| | | | | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | NFSv4: Clean up nfs4_atomic_openTrond Myklebust2010-09-171-2/+75
|/ | | | | | | | | | | Start moving the 'struct nameidata' dependent code out of the lower level NFS code in preparation for the removal of open intents. Instead of the struct nameidata, we pass down a partially initialised struct nfs_open_context that will be fully initialised by the atomic open upon success. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Fix an Oops in the NFSv4 atomic open codeTrond Myklebust2010-08-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Adam Lackorzynski reports: with 2.6.35.2 I'm getting this reproducible Oops: [ 110.825396] BUG: unable to handle kernel NULL pointer dereference at (null) [ 110.828638] IP: [<ffffffff811247b7>] encode_attrs+0x1a/0x2a4 [ 110.828638] PGD be89f067 PUD bf18f067 PMD 0 [ 110.828638] Oops: 0000 [#1] SMP [ 110.828638] last sysfs file: /sys/class/net/lo/operstate [ 110.828638] CPU 2 [ 110.828638] Modules linked in: rtc_cmos rtc_core rtc_lib amd64_edac_mod i2c_amd756 edac_core i2c_core dm_mirror dm_region_hash dm_log dm_snapshot sg sr_mod usb_storage ohci_hcd mptspi tg3 mptscsih mptbase usbcore nls_base [last unloaded: scsi_wait_scan] [ 110.828638] [ 110.828638] Pid: 11264, comm: setchecksum Not tainted 2.6.35.2 #1 [ 110.828638] RIP: 0010:[<ffffffff811247b7>] [<ffffffff811247b7>] encode_attrs+0x1a/0x2a4 [ 110.828638] RSP: 0000:ffff88003bf5b878 EFLAGS: 00010296 [ 110.828638] RAX: ffff8800bddb48a8 RBX: ffff88003bf5bb18 RCX: 0000000000000000 [ 110.828638] RDX: ffff8800be258800 RSI: 0000000000000000 RDI: ffff88003bf5b9f8 [ 110.828638] RBP: 0000000000000000 R08: ffff8800bddb48a8 R09: 0000000000000004 [ 110.828638] R10: 0000000000000003 R11: ffff8800be779000 R12: ffff8800be258800 [ 110.828638] R13: ffff88003bf5b9f8 R14: ffff88003bf5bb20 R15: ffff8800be258800 [ 110.828638] FS: 0000000000000000(0000) GS:ffff880041e00000(0063) knlGS:00000000556bd6b0 [ 110.828638] CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b [ 110.828638] CR2: 0000000000000000 CR3: 00000000be8ef000 CR4: 00000000000006e0 [ 110.828638] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 110.828638] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 110.828638] Process setchecksum (pid: 11264, threadinfo ffff88003bf5a000, task ffff88003f232210) [ 110.828638] Stack: [ 110.828638] 0000000000000000 ffff8800bfbcf920 0000000000000000 0000000000000ffe [ 110.828638] <0> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 110.828638] <0> 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 110.828638] Call Trace: [ 110.828638] [<ffffffff81124c1f>] ? nfs4_xdr_enc_setattr+0x90/0xb4 [ 110.828638] [<ffffffff81371161>] ? call_transmit+0x1c3/0x24a [ 110.828638] [<ffffffff813774d9>] ? __rpc_execute+0x78/0x22a [ 110.828638] [<ffffffff81371a91>] ? rpc_run_task+0x21/0x2b [ 110.828638] [<ffffffff81371b7e>] ? rpc_call_sync+0x3d/0x5d [ 110.828638] [<ffffffff8111e284>] ? _nfs4_do_setattr+0x11b/0x147 [ 110.828638] [<ffffffff81109466>] ? nfs_init_locked+0x0/0x32 [ 110.828638] [<ffffffff810ac521>] ? ifind+0x4e/0x90 [ 110.828638] [<ffffffff8111e2fb>] ? nfs4_do_setattr+0x4b/0x6e [ 110.828638] [<ffffffff8111e634>] ? nfs4_do_open+0x291/0x3a6 [ 110.828638] [<ffffffff8111ed81>] ? nfs4_open_revalidate+0x63/0x14a [ 110.828638] [<ffffffff811056c4>] ? nfs_open_revalidate+0xd7/0x161 [ 110.828638] [<ffffffff810a2de4>] ? do_lookup+0x1a4/0x201 [ 110.828638] [<ffffffff810a4733>] ? link_path_walk+0x6a/0x9d5 [ 110.828638] [<ffffffff810a42b6>] ? do_last+0x17b/0x58e [ 110.828638] [<ffffffff810a5fbe>] ? do_filp_open+0x1bd/0x56e [ 110.828638] [<ffffffff811cd5e0>] ? _atomic_dec_and_lock+0x30/0x48 [ 110.828638] [<ffffffff810a9b1b>] ? dput+0x37/0x152 [ 110.828638] [<ffffffff810ae063>] ? alloc_fd+0x69/0x10a [ 110.828638] [<ffffffff81099f39>] ? do_sys_open+0x56/0x100 [ 110.828638] [<ffffffff81027a22>] ? ia32_sysret+0x0/0x5 [ 110.828638] Code: 83 f1 01 e8 f5 ca ff ff 48 83 c4 50 5b 5d 41 5c c3 41 57 41 56 41 55 49 89 fd 41 54 49 89 d4 55 48 89 f5 53 48 81 ec 18 01 00 00 <8b> 06 89 c2 83 e2 08 83 fa 01 19 db 83 e3 f8 83 c3 18 a8 01 8d [ 110.828638] RIP [<ffffffff811247b7>] encode_attrs+0x1a/0x2a4 [ 110.828638] RSP <ffff88003bf5b878> [ 110.828638] CR2: 0000000000000000 [ 112.840396] ---[ end trace 95282e83fd77358f ]--- We need to ensure that the O_EXCL flag is turned off if the user doesn't set O_CREAT. Cc: stable@kernel.org Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: allow close-to-open cache semantics to apply to root of NFS filesystemNeil Brown2010-08-101-0/+7
| | | | | | | | | | | | | | | | | | To obey NFS cache semantics, the client must verify the cached attributes when a file is opened. In most cases this is done by a call to d_validate as one of the last steps in path_walk. However for the root of a filesystem, d_validate is only ever called on the mounted-on filesystem (except when the path ends '.' or '..'). So NFS has no chance to validate the attributes. So, in nfs_opendir, we revalidate the attributes if the opened directory is the mountpoint. This may cause double-validation for "." and ".." lookups, but that is better than missing regular /path/name lookups completely. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'nfs-for-2.6.36' of ↵Linus Torvalds2010-08-071-9/+0
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.linux-nfs.org/projects/trondmy/nfs-2.6 * 'nfs-for-2.6.36' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: (42 commits) NFS: NFSv4.1 is no longer a "developer only" feature NFS: NFS_V4 is no longer an EXPERIMENTAL feature NFS: Fix /proc/mount for legacy binary interface NFS: Fix the locking in nfs4_callback_getattr SUNRPC: Defer deleting the security context until gss_do_free_ctx() SUNRPC: prevent task_cleanup running on freed xprt SUNRPC: Reduce asynchronous RPC task stack usage SUNRPC: Move the bound cred to struct rpc_rqst SUNRPC: Clean up of rpc_bindcred() SUNRPC: Move remaining RPC client related task initialisation into clnt.c SUNRPC: Ensure that rpc_exit() always wakes up a sleeping task SUNRPC: Make the credential cache hashtable size configurable SUNRPC: Store the hashtable size in struct rpc_cred_cache NFS: Ensure the AUTH_UNIX credcache is allocated dynamically NFS: Fix the NFS users of rpc_restart_call() SUNRPC: The function rpc_restart_call() should return success/failure NFSv4: Get rid of the bogus RPC_ASSASSINATED(task) checks NFSv4: Clean up the process of renewing the NFSv4 lease NFSv4.1: Handle NFS4ERR_DELAY on SEQUENCE correctly NFS: nfs_rename() should not have to flush out writebacks ...
| * NFS: nfs_rename() should not have to flush out writebacksTrond Myklebust2010-08-031-9/+0
| | | | | | | | | | | | | | | | We don't really support nfs servers that invalidate the file handle after a rename, so precautions such as flushing out dirty data before renaming the file are superfluous. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | vfs: re-introduce MAY_CHDIREric Paris2010-08-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently MAY_ACCESS means that filesystems must check the permissions right then and not rely on cached results or the results of future operations on the object. This can be because of a call to sys_access() or because of a call to chdir() which needs to check search without relying on any future operations inside that dir. I plan to use MAY_ACCESS for other purposes in the security system, so I split the MAY_ACCESS and the MAY_CHDIR cases. Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
* | mm: add context argument to shrinker callbackDave Chinner2010-07-191-1/+1
|/ | | | | | | | | | | | The current shrinker implementation requires the registered callback to have global state to work from. This makes it difficult to shrink caches that are not global (e.g. per-filesystem caches). Pass the shrinker structure to the callback so that users can embed the shrinker structure in the context the shrinker needs to operate on and get back to it in the callback via container_of(). Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
* drop unused dentry argument to ->fsyncChristoph Hellwig2010-05-271-2/+4
| | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* NFS: Fix a lock imbalance typo in nfs_access_cache_shrinkerTrond Myklebust2010-05-261-0/+1
| | | | | | | | | Commit 9c7e7e23371e629dbb3b341610a418cdf1c19d91 (NFS: Don't call iput() in nfs_access_cache_shrinker) unintentionally removed the spin unlock for the inode->i_lock. Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Don't call iput() in nfs_access_cache_shrinkerTrond Myklebust2010-05-141-15/+4
| | | | | | | | iput() can potentially attempt to allocate memory, so we should avoid calling it in a memory shrinker. Instead, rely on the fact that iput() will call nfs_access_zap_cache(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Clean up nfs_access_zap_cache()Trond Myklebust2010-05-141-29/+31
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Don't run nfs_access_cache_shrinker() when the mask is GFP_NOFSTrond Myklebust2010-05-141-0/+2
| | | | | | | Both iput() and put_rpccred() might allocate memory under certain circumstances, so make sure that we don't recurse and deadlock... Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Reduce stack footprint of nfs_readdir()Trond Myklebust2010-05-141-7/+10
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFS: Reduce the stack footprint of nfs_lookupTrond Myklebust2010-05-141-10/+35
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* Merge branch 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6Linus Torvalds2010-04-291-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | * 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6: nfs: fix memory leak in nfs_get_sb with CONFIG_NFS_V4 nfs: fix some issues in nfs41_proc_reclaim_complete() NFS: Ensure that nfs_wb_page() waits for Pg_writeback to clear NFS: Fix an unstable write data integrity race nfs: testing for null instead of ERR_PTR() NFS: rsize and wsize settings ignored on v4 mounts NFSv4: Don't attempt an atomic open if the file is a mountpoint SUNRPC: Fix a bug in rpcauth_prune_expired
| * NFSv4: Don't attempt an atomic open if the file is a mountpointTrond Myklebust2010-04-221-1/+1
| | | | | | | | | | | | Fix https://bugzilla.kernel.org/show_bug.cgi?id=15789 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* | nfs d_revalidate() is too trigger-happy with d_drop()Al Viro2010-04-281-0/+2
|/ | | | | | | | | | | | | | | If dentry found stale happens to be a root of disconnected tree, we can't d_drop() it; its d_hash is actually part of s_anon and d_drop() would simply hide it from shrink_dcache_for_umount(), leading to all sorts of fun, including busy inodes on umount and oopsen after that. Bug had been there since at least 2006 (commit c636eb already has it), so it's definitely -stable fodder. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NFSv4: Fall back to ordinary lookup if nfs4_atomic_open() returns EISDIRTrond Myklebust2010-04-091-1/+1
| | | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
* NFSv4: Don't ignore the NFS_INO_REVAL_FORCED flag in nfs_revalidate_inode()Trond Myklebust2010-03-101-1/+1
| | | | | | | | | If the NFS_INO_REVAL_FORCED flag is set, that means that we don't yet have an up to date attribute cache. Even if we hold a delegation, we must put a GETATTR on the wire. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: stable@kernel.org
* NFS: Remove requirement for inode->i_mutex from nfs_invalidate_mappingTrond Myklebust2010-03-051-1/+1
| | | | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: fix oops in nfs_rename()OGAWA Hirofumi2010-01-061-0/+1
| | | | | | | | | | | | | | Recent change is missing to update "rehash". With that change, it will become the cause of adding dentry to hash twice. This explains the reason of Oops (dereference the freed dentry in __d_lookup()) on my machine. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Reported-by: Marvin <marvin24@gmx.de> Cc: Trond Myklebust <trond.myklebust@fys.uio.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: clean up sillyrenaming in nfs_rename()Miklos Szeredi2009-12-031-7/+4
| | | | | | | | | | | | The d_instantiate(new_dentry, NULL) is superfluous, the dentry is already negative. Rehashing this dummy dentry isn't needed either, d_move() works fine on an unhashed target. The re-checking for busy after a failed nfs_sillyrename() is bogus too: new_dentry->d_count < 2 would be a bug here. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: dont unhash target if renaming a directoryMiklos Szeredi2009-12-031-27/+29
| | | | | | | | | | | | Move unhashing the target to after the check for existence and being a non-directory. If renaming a directory then the VFS already unhashes the target if it is not busy. If it's busy then acquiring more references during the rename makes no difference. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: fix comments in nfs_rename()Miklos Szeredi2009-12-031-7/+5
| | | | | | | | | Comments are wrong or out of date. In particular d_drop() doesn't free the inode it just unhashes the dentry. And if target is a directory then it is not checked for being busy. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* nfs: remove unnecessary check from nfs_rename()Miklos Szeredi2009-12-031-8/+2
| | | | | | | VFS already checks if both source and target are directories. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
* NFSv4: The link() operation should return any delegation on the fileTrond Myklebust2009-10-261-0/+2
| | | | | | Otherwise, we have to wait for the server to recall it. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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