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2020-02-03NFSv4: Try to return the delegation immediately when marked for return on closeTrond Myklebust
Add a routine to return the delegation immediately upon close of the file if it was marked for return-on-close. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFS: Clear NFS_DELEGATION_RETURN_IF_CLOSED when the delegation is returnedTrond Myklebust
If a delegation is marked as needing to be returned when the file is closed, then don't clear that marking until we're ready to return it. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFSv4: nfs_inode_evict_delegation() should set NFS_DELEGATION_RETURNINGTrond Myklebust
In particular, the pnfs return-on-close code will check for that flag, so ensure we set it appropriately. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFS: nfs_find_open_context() should use cred_fscmp()Trond Myklebust
We want to find open contexts that match our filesystem access properties. They don't have to exactly match the cred. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFS: nfs_access_get_cached_rcu() should use cred_fscmp()Trond Myklebust
We do not need to have the rcu lookup method fail in the case where the fsuid/fsgid and supplemental groups match. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFSv4: pnfs_roc() must use cred_fscmp() to compare credsTrond Myklebust
When comparing two 'struct cred' for equality w.r.t. behaviour under filesystem access, we need to use cred_fscmp(). Fixes: a52458b48af1 ("NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-02-03NFS: remove unused macrosAlex Shi
MNT_fhs_status_sz/MNT_fhandle3_sz are never used after they were introduced. So better to remove them. Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Anna Schumaker <anna.schumaker@netapp.com> Cc: linux-nfs@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-24nfs: Return EINVAL rather than ERANGE for mount parse errorsDavid Howells
Return EINVAL rather than ERANGE for mount parse errors as the userspace mount command doesn't necessarily understand what to do with anything other than EINVAL. The old code returned -ERANGE as an intermediate error that then get converted to -EINVAL, whereas the new code returns -ERANGE. This was induced by passing minorversion=1 to a v4 mount where CONFIG_NFS_V4_1 was disabled in the kernel build. Fixes: 68f65ef40e1e ("NFS: Convert mount option parsing to use functionality from fs_parser.h") Reported-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-24NFS: allow deprecation of NFS UDP protocolOlga Kornievskaia
Add a kernel config CONFIG_NFS_DISABLE_UDP_SUPPORT to disallow NFS UDP mounts and enable it by default. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-24NFS: Add softreval behaviour to nfs_lookup_revalidate()Trond Myklebust
If the server is unavaliable, we want to allow the revalidating lookup to time out, and to default to validating the cached dentry if the 'softreval' mount option is set. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFSv3: FIx bug when using chacl and chmod to change aclSu Yanjun
We find a bug when running test under nfsv3  as below. 1) chacl u::r--,g::rwx,o:rw- file1 2) chmod u+w file1 3) chacl -l file1 We expect u::rw-, but it shows u::r--, more likely it returns the cached acl in inode. We dig the code find that the code path is different. chacl->..->__nfs3_proc_setacls->nfs_zap_acl_cache Then nfs_zap_acl_cache clears the NFS_INO_INVALID_ACL in NFS_I(inode)->cache_validity. chmod->..->nfs3_proc_setattr Because NFS_INO_INVALID_ACL has been cleared by chacl path, nfs_zap_acl_cache wont be called. nfs_setattr_update_inode will set NFS_INO_INVALID_ACL so let it before nfs_zap_acl_cache call. Signed-off-by: Su Yanjun <suyanjun218@gmail.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFSv4.x recover from pre-mature loss of openstateidOlga Kornievskaia
Ever since the commit 0e0cb35b417f, it's possible to lose an open stateid while retrying a CLOSE due to ERR_OLD_STATEID. Once that happens, operations that require openstateid fail with EAGAIN which is propagated to the application then tests like generic/446 and generic/168 fail with "Resource temporarily unavailable". Instead of returning this error, initiate state recovery when possible to recover the open stateid and then try calling nfs4_select_rw_stateid() again. Fixes: 0e0cb35b417f ("NFSv4: Handle NFS4ERR_OLD_STATEID in CLOSE/OPEN_DOWNGRADE") Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFSv4 fix acl retrieval over krb5i/krb5p mountsOlga Kornievskaia
For the krb5i and krb5p mount, it was problematic to truncate the received ACL to the provided buffer because an integrity check could not be preformed. Instead, provide enough pages to accommodate the largest buffer bounded by the largest RPC receive buffer size. Note: I don't think it's possible for the ACL to be truncated now. Thus NFS4_ACL_TRUNC flag and related code could be possibly removed but since I'm unsure, I'm leaving it. v2: needs +1 page. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Add mount option 'softreval'Trond Myklebust
Add a mount option 'softreval' that allows attribute revalidation 'getattr' calls to time out, and causes them to fall back to using the cached attributes. The use case for this option is for ensuring that we can still (slowly) traverse paths and use cached information even when the server is down. Once the server comes back up again, the getattr calls start succeeding, and the caches will revalidate as usual. The 'softreval' mount option is automatically enabled if you have specified 'softerr'. It can be turned off using the options 'nosoftreval', or 'hard'. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Trust cached access if we've already revalidated the inode onceTrond Myklebust
If we've already revalidated the inode once then don't distrust the access cache unless the NFS_INO_INVALID_ACCESS flag is actually set. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Fix nfs_direct_write_reschedule_io()Trond Myklebust
The 'hdr->good_bytes' is defined as the number of bytes we expect to read or write starting at offset hdr->io_start. In the case of a partial read/write we may end up adjusting hdr->args.offset and hdr->args.count to skip I/O for data that was already read/written, and so we must ensure the calculation takes that into account. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: When resending after a short write, reset the reply count to zeroTrond Myklebust
If we're resending a write due to a short read or write, ensure we reset the reply count to zero. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Improve tracing of permission callsTrond Myklebust
On exit from nfs_do_access(), record the mask representing the requested permissions, as well as the server-supplied set of access rights for this user. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15pNFS/flexfiles: Add tracing for layout errorsTrond Myklebust
Trace layout errors for pNFS/flexfiles on read/write/commit operations. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Clean up generic file commit tracepointTrond Myklebust
Clean up the generic file commit tracepoints to use a 64-bit value for the verifier, and to display the pNFS filehandle, if it exists. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Clean up generic writeback tracepointsTrond Myklebust
Clean up the generic writeback tracepoints so they do pass the full structures as arguments. Also ensure we report the number of bytes actually written. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Clean up generic file read tracepointsTrond Myklebust
Clean up the generic file read tracepoints so they do pass the full structures as arguments. Also ensure we report the number of bytes actually read. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15pNFS/flexfiles: Record resend attempts on I/O failureTrond Myklebust
If the attempt to do pNFS fails, then record what action we take to recover (resend, reset to pnfs or reset to mds). Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Fix fix of show_nfs_errorsTrond Myklebust
Casting a negative value to an unsigned long is not the same as converting it to its absolute value. Fixes: 96650e2effa2 ("NFS: Fix show_nfs_errors macros again") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFSv4: Improve read/write/commit tracingTrond Myklebust
Ensure we always return the number of bytes read/written. Also display the pnfs filehandle if it is in use. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS/pnfs: Fix pnfs_generic_prepare_to_resend_writes()Trond Myklebust
Instead of making assumptions about the commit verifier contents, change the commit code to ensure we always check that the verifier was set by the XDR code. Fixes: f54bcf2ecee9 ("pnfs: Prepare for flexfiles by pulling out common code") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Fix up fsync() when the server rebootedTrond Myklebust
Don't clear the NFS_CONTEXT_RESEND_WRITES flag until after calling nfs_commit_inode(). Otherwise, if nfs_commit_inode() returns an error, we end up with dirty pages in the page cache, but no tag to tell us that those pages need resending. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Revalidate the file mapping on all fatal writeback errorsTrond Myklebust
If a write or commit failed, and the mapping sees a fatal error, we need to revalidate the contents of that mapping. Fixes: 06c9fdf3b9f1 ("NFS: On fatal writeback errors, we need to call nfs_inode_remove_request()") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Revalidate the file size on a fatal write errorTrond Myklebust
If we suffer a fatal error upon writing a file, which causes us to need to revalidate the entire mapping, then we should also revalidate the file size. Fixes: d2ceb7e57086 ("NFS: Don't use page_file_mapping after removing the page") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Add missing null check for failed allocationColin Ian King
Currently the allocation of buf is not being null checked and a null pointer dereference can occur when the memory allocation fails. Fix this by adding a check and returning -ENOMEM. Addresses-Coverity: ("Dereference null return") Fixes: 6d972518b821 ("NFS: Add fs_context support.") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: NFS_SWAP should depend on SWAPGeert Uytterhoeven
If CONFIG_SWAP=n, it does not make much sense to offer the user the option to enable support for swapping over NFS, as that will still fail at run time: # swapon /swap swapon: /swap: swapon failed: Function not implemented Fix this by adding a dependency on CONFIG_SWAP. Fixes: a564b8f0398636ba ("nfs: enable swap on NFS") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15fs/nfs, swapon: check holes in swapfileMurphy Zhou
swapon over NFS does not go through generic_swapfile_activate code path when setting up extents. This makes holes in NFS swapfiles possible which is not expected for swapon. Signed-off-by: Murphy Zhou <jencce.kernel@gmail.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS4: Report callback authentication errorsChuck Lever
This seems to be a somewhat common issue with Kerberos NFSv4.0 set-ups. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Introduce trace events triggered by page writeback errorsChuck Lever
Try to capture the reason for the writeback path tagging an error on a page. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: move dprintk after nfs_alloc_fattr in nfs3_proc_lookupzhengbin
In nfs3_proc_lookup, if nfs_alloc_fattr fails, will only print "NFS call lookup". This may be confusing, move dprintk after nfs_alloc_fattr. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS4: Remove unneeded semicolonzhengbin
Fixes coccicheck warning: fs/nfs/nfs4state.c:1138:2-3: Unneeded semicolon fs/nfs/nfs4proc.c:6862:2-3: Unneeded semicolon fs/nfs/nfs4proc.c:8629:2-3: Unneeded semicolon Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: zhengbin <zhengbin13@huawei.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: encode nfsv4 timestamps as 64-bitArnd Bergmann
On 32-bit architectures, xdr_encode_nfstime4() needlessly truncates timestamps to a 32-bit value in the range between year 1902 and 2038. Change it to use 'struct timespec64' to allow the entire range of values supported by the server. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: remove timespec from xdr_encode_nfstimeArnd Bergmann
For NFSv2 and NFSv3, timestamps are stored using 32-bit entities and overflow in y2038. For historic reasons we truncate the 64-bit timestamps by converting from a timespec64 to a timespec first. Remove this unnecessary conversion step and do the truncation in the final functions that take a timestamp. This is transparent to users, but avoids one of the last uses of 'timespec' and lets us remove it later. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: fscache: use timespec64 in inode auxdataArnd Bergmann
nfs currently behaves differently on 32-bit and 64-bit kernels regarding the on-disk format of nfs_fscache_inode_auxdata. That format should really be the same on any kernel, and we should avoid the 'timespec' type in order to remove that from the kernel later on. Using plain 'timespec64' would not be good here, since that includes implied padding and would possibly leak kernel stack data to the on-disk format on 32-bit architectures. struct __kernel_timespec would work as a replacement, but open-coding the two struct members in nfs_fscache_inode_auxdata makes it more obvious what's going on here, and keeps the current format for 64-bit architectures. Cc: David Howells <dhowells@redhat.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15nfs: use timespec64 in nfs_fattrArnd Bergmann
Push down the use of timespec64 into NFS nfs_fattr, to avoid needless conversions, and get closer to having 64-bit time_t support on 32-bit NFSv4 and removing some old interfaces from the kernel. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Attach supplementary error information to fs_context.Scott Mayhew
Split out from commit "NFS: Add fs_context support." Add wrappers nfs_errorf(), nfs_invalf(), and nfs_warnf() which log error information to the fs_context. Convert some printk's to use these new wrappers instead. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Additional refactoring for fs_context conversionScott Mayhew
Split out from commit "NFS: Add fs_context support." This patch adds additional refactoring for the conversion of NFS to use fs_context, namely: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. nfs_clone_mount has had several fields removed, and nfs_mount_info has been removed altogether. (*) Various functions now take an fs_context as an argument instead of nfs_mount_info, nfs_fs_context, etc. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Add fs_context support.David Howells
Add filesystem context support to NFS, parsing the options in advance and attaching the information to struct nfs_fs_context. The highlights are: (*) Merge nfs_mount_info and nfs_clone_mount into nfs_fs_context. This structure represents NFS's superblock config. (*) Make use of the VFS's parsing support to split comma-separated lists (*) Pin the NFS protocol module in the nfs_fs_context. (*) Attach supplementary error information to fs_context. This has the downside that these strings must be static and can't be formatted. (*) Remove the auxiliary file_system_type structs since the information necessary can be conveyed in the nfs_fs_context struct instead. (*) Root mounts are made by duplicating the config for the requested mount so as to have the same parameters. Submounts pick up their parameters from the parent superblock. [AV -- retrans is u32, not string] [SM -- Renamed cfg to ctx in a few functions in an earlier patch] [SM -- Moved fs_context mount option parsing to an earlier patch] [SM -- Moved fs_context error logging to a later patch] [SM -- Fixed printks in nfs4_try_get_tree() and nfs4_get_referral_tree()] [SM -- Added is_remount_fc() helper] [SM -- Deferred some refactoring to a later patch] [SM -- Fixed referral mounts, which were broken in the original patch] [SM -- Fixed leak of nfs_fattr when fs_context is freed] Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Convert mount option parsing to use functionality from fs_parser.hScott Mayhew
Split out from commit "NFS: Add fs_context support." Convert existing mount option definitions to fs_parameter_enum's and fs_parameter_spec's. Parse mount options using fs_parse() and lookup_constant(). Notes: 1) Fixed a typo in the udp6 definition in nfs_xprt_protocol_tokens from the original commit. 2) fs_parse() expects an fs_context as the first arg so that any errors can be logged to the fs_context. We're passing NULL for the fs_context (this will change in commit "NFS: Add fs_context support.") which is okay as it will cause logfc() to do a printk() instead. 3) fs_parse() expects an fs_paramter as the third arg. We're building an fs_parameter manually in nfs_fs_context_parse_option(), which will go away in commit "NFS: Add fs_context support.". Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: rename nfs_fs_context pointer arg in a few functionsScott Mayhew
Split out from commit "NFS: Add fs_context support." Rename cfg to ctx in nfs_init_server(), nfs_verify_authflavors(), and nfs_request_mount(). No functional changes. Signed-off-by: Scott Mayhew <smayhew@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Do some tidying of the parsing codeDavid Howells
Do some tidying of the parsing code, including: (*) Returning 0/error rather than true/false. (*) Putting the nfs_fs_context pointer first in some arg lists. (*) Unwrap some lines that will now fit on one line. (*) Provide unioned sockaddr/sockaddr_storage fields to avoid casts. (*) nfs_parse_devname() can paste its return values directly into the nfs_fs_context struct as that's where the caller puts them. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Add a small buffer in nfs_fs_context to avoid string dupDavid Howells
Add a small buffer in nfs_fs_context to avoid string duplication when parsing numbers. Also make the parsing function wrapper place the parsed integer directly in the appropriate nfs_fs_context struct member. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Deindent nfs_fs_context_parse_option()David Howells
Deindent nfs_fs_context_parse_option(). Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Split nfs_parse_mount_options()David Howells
Split nfs_parse_mount_options() to move the prologue, list-splitting and epilogue into one function and the per-option processing into another. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-01-15NFS: Rename struct nfs_parsed_mount_data to struct nfs_fs_contextDavid Howells
Rename struct nfs_parsed_mount_data to struct nfs_fs_context and rename pointers to it to "ctx". At some point this will be pointed to by an fs_context struct's fs_private pointer. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
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