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path: root/fs/nfs/nfs4xdr.c
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2022-11-27NFSv4.2: Fix a memory stomp in decode_attr_security_labelTrond Myklebust
We must not change the value of label->len if it is zero, since that indicates we stored a label. Fixes: b4487b935452 ("nfs: Fix getxattr kernel panic and memory overflow") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2022-11-27NFSv4.2: Always decode the security labelTrond Myklebust
If the server returns a reply that includes a security label, then we must decode it whether or not we can store the results. Fixes: 1e2f67da8931 ("NFS: Remove the nfs4_label argument from decode_getattr_*() functions") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2022-11-27NFSv4.2: Clear FATTR4_WORD2_SECURITY_LABEL when done decodingTrond Myklebust
We need to clear the FATTR4_WORD2_SECURITY_LABEL bitmap flag irrespective of whether or not the label is too long. Fixes: aa9c2669626c ("NFS: Client implementation of Labeled-NFS") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2022-05-31NFSv4: Fix free of uninitialized nfs4_label on referral lookup.Benjamin Coddington
Send along the already-allocated fattr along with nfs4_fs_locations, and drop the memcpy of fattr. We end up growing two more allocations, but this fixes up a crash as: PID: 790 TASK: ffff88811b43c000 CPU: 0 COMMAND: "ls" #0 [ffffc90000857920] panic at ffffffff81b9bfde #1 [ffffc900008579c0] do_trap at ffffffff81023a9b #2 [ffffc90000857a10] do_error_trap at ffffffff81023b78 #3 [ffffc90000857a58] exc_stack_segment at ffffffff81be1f45 #4 [ffffc90000857a80] asm_exc_stack_segment at ffffffff81c009de #5 [ffffc90000857b08] nfs_lookup at ffffffffa0302322 [nfs] #6 [ffffc90000857b70] __lookup_slow at ffffffff813a4a5f #7 [ffffc90000857c60] walk_component at ffffffff813a86c4 #8 [ffffc90000857cb8] path_lookupat at ffffffff813a9553 #9 [ffffc90000857cf0] filename_lookup at ffffffff813ab86b Suggested-by: Trond Myklebust <trondmy@hammerspace.com> Fixes: 9558a007dbc3 ("NFS: Remove the label from the nfs4_lookup_res struct") Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2022-05-17NFSv4: Add encoders/decoders for the NFSv4.1 dacl and sacl attributesTrond Myklebust
Add the ability to set or retrieve the acl using the NFSv4.1 'dacl' and 'sacl' attributes to the NFSv4 xdr encoders/decoders. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2022-03-02NFS: Optimise away the previous cookie fieldTrond Myklebust
Replace the 'previous cookie' field in struct nfs_entry with the array->last_cookie. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2022-03-02NFSv4: Ask for a full XDR buffer of readdir goodnessTrond Myklebust
Instead of pretending that we know the ratio of directory info vs readdirplus attribute info, just set the 'dircount' field to the same value as the 'maxcount' field. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2022-01-12NFSv4 remove zero number of fs_locations entries error checkOlga Kornievskaia
Remove the check for the zero length fs_locations reply in the xdr decoding, and instead check for that in the migration code. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2022-01-06NFSv4: Add some support for case insensitive filesystemsTrond Myklebust
Add capabilities to allow the NFS client to recognise when it is dealing with case insensitive and case preserving filesystems. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2022-01-06NFSv4 only print the label when its queriedOlga Kornievskaia
When the bitmask of the attributes doesn't include the security label, don't bother printing it. Since the label might not be null terminated, adjust the printing format accordingly. Signed-off-by: Olga Kornievskaia <kolga@netapp.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2021-11-05NFS: Remove the nfs4_label argument from decode_getattr_*() functionsAnna Schumaker
Wa can check if the fattr has an allocated label when needed Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs_setattrresAnna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs4_getattr_resAnna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the f_label from the nfs4_opendata and nfs_openresAnna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs4_lookupp_res structAnna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the label from the nfs4_lookup_res structAnna Schumaker
And usethe fattr's label field instead. I also adjust function calls to remove labels along the way. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs4_link_res structAnna Schumaker
Again, use the fattr's label field instead. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs4_create_res structAnna Schumaker
Instead, use the label embedded in the attached fattr. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFS: Remove the nfs4_label from the nfs_entry structAnna Schumaker
And instead allocate the fattr using nfs_alloc_fattr_with_label() Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFSv4: Fix potential Oops in decode_op_map()Trond Myklebust
The return value of xdr_inline_decode() is not being checked, leading to a potential Oops. Just replace the open coded array decode with the generic XDR version. Reported-by: <rtm@csail.mit.edu> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-11-05NFSv4: Ensure decode_compound_hdr() sanity checks the tagTrond Myklebust
The server is supposed to return the same tag that the client sends in the outgoing RPC call, but we should still sanity check the length just in case. Reported-by: <rtm@csail.mit.edu> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-05-07Merge tag 'nfs-for-5.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client updates from Trond Myklebust: "Highlights include: Stable fixes: - Add validation of the UDP retrans parameter to prevent shift out-of-bounds - Don't discard pNFS layout segments that are marked for return Bugfixes: - Fix a NULL dereference crash in xprt_complete_bc_request() when the NFSv4.1 server misbehaves. - Fix the handling of NFS READDIR cookie verifiers - Sundry fixes to ensure attribute revalidation works correctly when the server does not return post-op attributes. - nfs4_bitmask_adjust() must not change the server global bitmasks - Fix major timeout handling in the RPC code. - NFSv4.2 fallocate() fixes. - Fix the NFSv4.2 SEEK_HOLE/SEEK_DATA end-of-file handling - Copy offload attribute revalidation fixes - Fix an incorrect filehandle size check in the pNFS flexfiles driver - Fix several RDMA transport setup/teardown races - Fix several RDMA queue wrapping issues - Fix a misplaced memory read barrier in sunrpc's call_decode() Features: - Micro optimisation of the TCP transmission queue using TCP_CORK - statx() performance improvements by further splitting up the tracking of invalid cached file metadata. - Support the NFSv4.2 'change_attr_type' attribute and use it to optimise handling of change attribute updates" * tag 'nfs-for-5.13-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (85 commits) xprtrdma: Fix a NULL dereference in frwr_unmap_sync() sunrpc: Fix misplaced barrier in call_decode NFSv4.2: Remove ifdef CONFIG_NFSD from NFSv4.2 client SSC code. xprtrdma: Move fr_mr field to struct rpcrdma_mr xprtrdma: Move the Work Request union to struct rpcrdma_mr xprtrdma: Move fr_linv_done field to struct rpcrdma_mr xprtrdma: Move cqe to struct rpcrdma_mr xprtrdma: Move fr_cid to struct rpcrdma_mr xprtrdma: Remove the RPC/RDMA QP event handler xprtrdma: Don't display r_xprt memory addresses in tracepoints xprtrdma: Add an rpcrdma_mr_completion_class xprtrdma: Add tracepoints showing FastReg WRs and remote invalidation xprtrdma: Avoid Send Queue wrapping xprtrdma: Do not wake RPC consumer on a failed LocalInv xprtrdma: Do not recycle MR after FastReg/LocalInv flushes xprtrdma: Clarify use of barrier in frwr_wc_localinv_done() xprtrdma: Rename frwr_release_mr() xprtrdma: rpcrdma_mr_pop() already does list_del_init() xprtrdma: Delete rpcrdma_recv_buffer_put() xprtrdma: Fix cwnd update ordering ...
2021-05-07treewide: remove editor modelines and cruftMasahiro Yamada
The section "19) Editor modelines and other cruft" in Documentation/process/coding-style.rst clearly says, "Do not include any of these in source files." I recently receive a patch to explicitly add a new one. Let's do treewide cleanups, otherwise some people follow the existing code and attempt to upstream their favoriate editor setups. It is even nicer if scripts/checkpatch.pl can check it. If we like to impose coding style in an editor-independent manner, I think editorconfig (patch [1]) is a saner solution. [1] https://lore.kernel.org/lkml/20200703073143.423557-1-danny@kdrag0n.dev/ Link: https://lkml.kernel.org/r/20210324054457.1477489-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> [auxdisplay] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-04-14NFSv4: Catch and trace server filehandle encoding errorsTrond Myklebust
If the server returns a filehandle with an invalid length, then trace that, and return an EREMOTEIO error. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-04-14NFSv4: Add tracing for COMPOUND errorsTrond Myklebust
When the server returns a different operation than we expected, then trace that. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-04-13NFSv4: Add support for the NFSv4.2 "change_attr_type" attributeTrond Myklebust
The change_attr_type allows the server to provide a description of how the change attribute will behave. This again will allow the client to optimise its behaviour w.r.t. attribute revalidation. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2021-04-13NFSv4: Fix value of decode_fsinfo_maxszTrond Myklebust
At least two extra fields have been added to fsinfo since this was last updated. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-17Merge tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfsLinus Torvalds
Pull NFS client updates from Trond Myklebust: "Highlights include: Features: - NFSv3: Add emulation of lookupp() to improve open_by_filehandle() support - A series of patches to improve readdir performance, particularly with large directories - Basic support for using NFS/RDMA with the pNFS files and flexfiles drivers - Micro-optimisations for RDMA - RDMA tracing improvements Bugfixes: - Fix a long standing bug with xs_read_xdr_buf() when receiving partial pages (Dan Aloni) - Various fixes for getxattr and listxattr, when used over non-TCP transports - Fixes for containerised NFS from Sargun Dhillon - switch nfsiod to be an UNBOUND workqueue (Neil Brown) - READDIR should not ask for security label information if there is no LSM policy (Olga Kornievskaia) - Avoid using interval-based rebinding with TCP in lockd (Calum Mackay) - A series of RPC and NFS layer fixes to support the NFSv4.2 READ_PLUS code - A couple of fixes for pnfs/flexfiles read failover Cleanups: - Various cleanups for the SUNRPC xdr code in conjunction with the READ_PLUS fixes" * tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (90 commits) NFS/pNFS: Fix a typo in ff_layout_resend_pnfs_read() pNFS/flexfiles: Avoid spurious layout returns in ff_layout_choose_ds_for_read NFSv4/pnfs: Add tracing for the deviceid cache fs/lockd: convert comma to semicolon NFSv4.2: fix error return on memory allocation failure NFSv4.2/pnfs: Don't use READ_PLUS with pNFS yet NFSv4.2: Deal with potential READ_PLUS data extent buffer overflow NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflow NFSv4.2: Handle hole lengths that exceed the READ_PLUS read buffer NFSv4.2: decode_read_plus_hole() needs to check the extent offset NFSv4.2: decode_read_plus_data() must skip padding after data segment NFSv4.2: Ensure we always reset the result->count in decode_read_plus() SUNRPC: When expanding the buffer, we may need grow the sparse pages SUNRPC: Cleanup - constify a number of xdr_buf helpers SUNRPC: Clean up open coded setting of the xdr_stream 'nwords' field SUNRPC: _copy_to/from_pages() now check for zero length SUNRPC: Cleanup xdr_shrink_bufhead() SUNRPC: Fix xdr_expand_hole() SUNRPC: Fixes for xdr_align_data() SUNRPC: _shift_data_left/right_pages should check the shift length ...
2020-12-02NFSv4: Fix open coded xdr_stream_remaining()Trond Myklebust
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-02SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages()Trond Myklebust
rpc_prepare_reply_pages() currently expects the 'hdrsize' argument to contain the length of the data that we expect to want placed in the head kvec plus a count of 1 word of padding that is placed after the page data. This is very confusing when trying to read the code, and sometimes leads to callers adding an arbitrary value of '1' just in order to satisfy the requirement (whether or not the page data actually needs such padding). This patch aims to clarify the code by changing the 'hdrsize' argument to remove that 1 word of padding. This means we need to subtract the padding from all the existing callers. Fixes: 02ef04e432ba ("NFS: Account for XDR pad of buf->pages") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-12-02NFSv4: Fix the alignment of page data in the getdeviceinfo replyTrond Myklebust
We can fit the device_addr4 opaque data padding in the pages. Fixes: cf500bac8fd4 ("SUNRPC: Introduce rpc_prepare_reply_pages()") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-11-30SUNRPC: Add xdr_set_scratch_page() and xdr_reset_scratch_buffer()Chuck Lever
Clean up: De-duplicate some frequently-used code. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2020-10-07NFS: Add READ_PLUS data segment supportAnna Schumaker
This patch adds client support for decoding a single NFS4_CONTENT_DATA segment returned by the server. This is the simplest implementation possible, since it does not account for any hole segments in the reply. Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-10-07NFS: Use xdr_page_pos() in NFSv4 decode_getacl()Anna Schumaker
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2020-08-12fs: nfs: delete repeated words in commentsRandy Dunlap
Drop duplicated words {the, and} in comments. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Trond Myklebust <trond.myklebust@hammerspace.com> Cc: Anna Schumaker <anna.schumaker@netapp.com> Cc: linux-nfs@vger.kernel.org Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-08-12nfs: Fix getxattr kernel panic and memory overflowJeffrey Mitchell
Move the buffer size check to decode_attr_security_label() before memcpy() Only call memcpy() if the buffer is large enough Fixes: aa9c2669626c ("NFS: Client implementation of Labeled-NFS") Signed-off-by: Jeffrey Mitchell <jeffrey.mitchell@starlab.io> [Trond: clean up duplicate test of label->len != 0] Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-07-13NFSv4.2: add client side XDR handling for extended attributesFrank van der Linden
Define the argument and response structures that will be used for RFC 8276 extended attribute RPC calls, and implement the necessary functions to encode/decode the extended attribute operations. Signed-off-by: Frank van der Linden <fllinden@amazon.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2020-07-13NFSv4.2: query the server for extended attribute supportFrank van der Linden
Query the server for extended attribute support, and record it as the NFS_CAP_XATTR flag in the server capabilities. Signed-off-by: Frank van der Linden <fllinden@amazon.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.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: 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: 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>
2019-11-06Merge branch 'linux-ssc-for-5.5'Trond Myklebust
2019-11-03NFSv4: Encode 64-bit timestampsTrond Myklebust
NFSv4 supports 64-bit timestamps, so there is no point in converting the struct iattr timestamps to 32-bits before encoding. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-11-03NFS: Convert struct nfs_fattr to use struct timespec64Trond Myklebust
NFSv4 supports 64-bit times, so we should switch to using struct timespec64 when decoding attributes. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-10-09NFS: add COPY_NOTIFY operationOlga Kornievskaia
Try using the delegation stateid, then the open stateid. Only NL4_NETATTR, No support for NL4_NAME and NL4_URL. Allow only one source server address to be returned for now. To distinguish between same server copy offload ("intra") and a copy between different server ("inter"), do a check of server owner identity and also make sure server is capable of doing a copy offload. Signed-off-by: Andy Adamson <andros@netapp.com> Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
2019-08-20fs: nfs: Fix possible null-pointer dereferences in encode_attrs()Jia-Ju Bai
In encode_attrs(), there is an if statement on line 1145 to check whether label is NULL: if (label && (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL)) When label is NULL, it is used on lines 1178-1181: *p++ = cpu_to_be32(label->lfs); *p++ = cpu_to_be32(label->pi); *p++ = cpu_to_be32(label->len); p = xdr_encode_opaque_fixed(p, label->label, label->len); To fix these bugs, label is checked before being used. These bugs are found by a static analysis tool STCheck written by us. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-07-13nfs4: Make nfs4_proc_get_lease_time available for nfs4.0Donald Buczek
Compile nfs4_proc_get_lease_time, enc_get_lease_time and dec_get_lease_time for nfs4.0. Use nfs4_sequence_done instead of nfs41_sequence_done in nfs4_proc_get_lease_time, Signed-off-by: Donald Buczek <buczek@molgen.mpg.de> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-07-13nfs: Fix copy-and-paste error in debug messageDonald Buczek
The debug message of decode_attr_lease_time incorrectly says "file size". Fix it to "lease time". Signed-off-by: Donald Buczek <buczek@molgen.mpg.de> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
2019-07-09NFS: Record task, client ID, and XID in xdr_status trace pointsChuck Lever
When triggering an nfs_xdr_status trace point, record the task ID and XID of the failing RPC to better pinpoint the problem. This feels like a bit of a layering violation. Suggested-by: Trond Myklebust <trondmy@hammerspace.com> Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2019-04-11NFS: Fix handling of reply page vectorChuck Lever
NFSv4 GETACL and FS_LOCATIONS requests stopped working in v5.1-rc. These two need the extra padding to be added directly to the reply length. Reported-by: Olga Kornievskaia <aglo@umich.edu> Fixes: 02ef04e432ba ("NFS: Account for XDR pad of buf->pages") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Olga Kornievskaia <aglo@umich.edu> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
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