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linux/fs/cifs
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Al Viro f6a9bc336b cifs: allocate buffer in the caller of build_path_from_dentry() 
build_path_from_dentry() open-codes dentry_path_raw().  The reason
we can't use dentry_path_raw() in there (and postprocess the
result as needed) is that the callers of build_path_from_dentry()
expect that the object to be freed on cleanup and the string to
be used are at the same address.  That's painful, since the path
is naturally built end-to-beginning - we start at the leaf and
go through the ancestors, accumulating the pathname.

Life would be easier if we left the buffer allocation to callers.
It wouldn't be exact-sized buffer, but none of the callers keep
the result for long - it's always freed before the caller returns.
So there's no need to do exact-sized allocation; better use
__getname()/__putname(), same as we do for pathname arguments
of syscalls.  What's more, there's no need to do allocation under
spinlocks, so GFP_ATOMIC is not needed.

Next patch will replace the open-coded dentry_path_raw() (in
build_path_from_dentry_optional_prefix()) with calling the real
thing.  This patch only introduces wrappers for allocating/freeing
the buffers and switches to new calling conventions:
	build_path_from_dentry(dentry, buf)
expects buf to be address of a page-sized object or NULL,
return value is a pathname built inside that buffer on success,
ERR_PTR(-ENOMEM) if buf is NULL and ERR_PTR(-ENAMETOOLONG) if
the pathname won't fit into page.  Note that we don't need to
check for failure when allocating the buffer in the caller -
build_path_from_dentry() will do the right thing.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steve French <stfrench@microsoft.com>
2021-04-25 16:28:23 -05:00
..
asn1.c cifs: remove bogus debug code 2020-10-22 12:17:52 -05:00
cache.c cifs: Make extract_sharename function public 2020-12-14 09:16:22 -06:00
cifs_debug.c cifs: simplify SWN code with dummy funcs instead of ifdefs 2021-04-25 16:28:22 -05:00
cifs_debug.h cifs: Standardize logging output 2020-06-01 00:10:18 -05:00
cifs_dfs_ref.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
cifs_fs_sb.h cifs: move [brw]size from cifs_sb to cifs_sb->ctx 2020-12-14 09:26:30 -06:00
cifs_ioctl.h cifs: add SMB3 change notification support 2020-02-06 09:14:28 -06:00
cifs_spnego.c cifs: switch servers depending on binding state 2019-11-25 01:16:30 -06:00
cifs_spnego.h
cifs_swn.c fs/cifs/: fix misspellings using codespell tool 2021-03-19 00:37:51 -05:00
cifs_swn.h cifs: simplify SWN code with dummy funcs instead of ifdefs 2021-04-25 16:28:22 -05:00
cifs_unicode.c Convert trailing spaces and periods in path components 2020-10-11 23:57:18 -05:00
cifs_unicode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifs_uniupr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifsacl.c cifs: Remove useless variable 2021-04-25 16:28:22 -05:00
cifsacl.h cifs: Fix cifsacl ACE mask for group and others. 2021-02-22 21:20:44 -06:00
cifsencrypt.c cifs: change confusing field serverName (to ip_addr) 2021-02-22 21:20:43 -06:00
cifsfs.c cifs: remove old dead code 2021-04-25 16:28:22 -05:00
cifsfs.h cifs/smb3 fixes including improvements to mode bit conversion when using cifsacl mount option, new mount options for controlling attribute caching, improvements to crediting and reconnect, improved debugging 2021-02-26 14:09:41 -08:00
cifsglob.h cifs: constify path argument of ->make_node() 2021-04-25 16:28:23 -05:00
cifspdu.h cifs: cifspdu.h: Replace one-element array with flexible-array member 2021-04-25 16:28:22 -05:00
cifsproto.h cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
cifsroot.c cifs: Standardize logging output 2020-06-01 00:10:18 -05:00
cifssmb.c cifs: remove old dead code 2021-04-25 16:28:22 -05:00
connect.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
dfs_cache.c cifs: constify get_normalized_path() properly 2021-04-25 16:28:23 -05:00
dfs_cache.h cifs: rename smb_vol as smb3_fs_context and move it to fs_context.h 2020-12-13 19:12:07 -06:00
dir.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
dns_resolve.c keys: Pass the network namespace into request_key mechanism 2019-06-27 23:02:12 +01:00
dns_resolve.h
export.c docs: fs: convert docs without extension to ReST 2019-07-31 13:31:05 -06:00
file.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
fs_context.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
fs_context.h cifs: Add new parameter "acregmax" for distinct file and directory metadata timeout 2021-02-25 11:47:49 -06:00
fscache.c cifs: Make extract_sharename function public 2020-12-14 09:16:22 -06:00
fscache.h cifs: Make extract_sharename function public 2020-12-14 09:16:22 -06:00
inode.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
ioctl.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
Kconfig cifs: On cifs_reconnect, resolve the hostname again. 2021-04-07 21:29:36 -05:00
link.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
Makefile cifs: On cifs_reconnect, resolve the hostname again. 2021-04-07 21:29:36 -05:00
misc.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
netlink.c cifs: Set witness notification handler for messages from userspace daemon 2020-12-14 09:16:22 -06:00
netlink.h cifs: Register generic netlink family 2020-12-14 09:16:22 -06:00
netmisc.c cifs`: handle ERRBaduid for SMB1 2020-08-02 18:00:25 -05:00
nterr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
nterr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
ntlmssp.h cifs: dynamic allocation of ntlmssp blob 2016-06-23 23:45:07 -05:00
readdir.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
rfc1002pdu.h
sess.c cifs: fix credit accounting for extra channel 2021-03-06 11:35:57 -06:00
smb1ops.c cifs: constify path argument of ->make_node() 2021-04-25 16:28:23 -05:00
smb2file.c cifs: allow unlock flock and OFD lock across fork 2020-03-22 22:49:09 -05:00
smb2glob.h cifs: Adjust key sizes and key generation routines for AES256 encryption 2021-03-26 07:49:39 -05:00
smb2inode.c cifs: do not send close in compound create+close requests 2021-03-08 21:23:22 -06:00
smb2maperror.c cifs: map STATUS_ACCOUNT_LOCKED_OUT to -EACCES 2020-10-15 23:58:14 -05:00
smb2misc.c cifs: Silently ignore unknown oplock break handle 2021-03-26 18:05:26 -05:00
smb2ops.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00
smb2pdu.c cifs: ask for more credit on async read/write code paths 2021-03-06 11:35:57 -06:00
smb2pdu.h SMB3: update structures for new compression protocol definitions 2021-04-25 16:28:23 -05:00
smb2proto.h cifs: do not send close in compound create+close requests 2021-03-08 21:23:22 -06:00
smb2status.h cifs: don't use __constant_cpu_to_le32() 2019-05-07 23:24:54 -05:00
smb2transport.c cifs: Adjust key sizes and key generation routines for AES256 encryption 2021-03-26 07:49:39 -05:00
smbdirect.c cifs: Fix fall-through warnings for Clang 2020-12-13 19:12:07 -06:00
smbdirect.h cifs: smbd: Do not schedule work to send immediate packet on every receive 2020-04-07 12:41:16 -05:00
smbencrypt.c fs: cifs: move from the crypto cipher API to the new DES library interface 2019-08-22 14:57:34 +10:00
smberr.h
smbfsctl.h smb3: add some missing definitions from MS-FSCC 2020-10-23 15:38:10 -05:00
trace.c smb3: Cleanup license mess 2019-01-24 09:37:33 -06:00
trace.h cifs: Identify a connection by a conn_id. 2021-02-16 15:48:02 -06:00
transport.c cifs: Fix preauth hash corruption 2021-03-14 18:14:32 -05:00
unc.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
winucase.c Replace HTTP links with HTTPS ones: CIFS 2020-07-05 14:23:38 -06:00
xattr.c cifs: allocate buffer in the caller of build_path_from_dentry() 2021-04-25 16:28:23 -05:00