Changes in proc_net.c

fc253215 - fs: Add kernel-doc comments to proc_create_net_data_write()

Fri, 15 Mar 2024 07:38:05 +0000

fs: Add kernel-doc comments to proc_create_net_data_write()This commit adds kernel-doc style comments with complete parameterdescriptions for the function proc_create_net_data_write.Signed-off-by: Yang Li Link: https://lore.kernel.org/r/20240315073805.77463-1-yang.lee@linux.alibaba.comSigned-off-by: Christian Brauner List of files: /linux-6.15/fs/proc/proc_net.c

0d72b928 - fs: pass the request_mask to generic_fillattr

Mon, 07 Aug 2023 19:38:33 +0000

fs: pass the request_mask to generic_fillattrgeneric_fillattr just fills in the entire stat struct indiscriminatelytoday, copying data from the inode. There is at least one attribute(STATX_CHANGE_COOKIE) that can have side effects when it is reported,and we're looking at adding more with the addition of multigraintimestamps.Add a request_mask argument to generic_fillattr and have most callersjust pass in the value that is passed to getattr. Have other callers(e.g. ksmbd) just pass in STATX_BASIC_STATS. Also move the setting ofSTATX_CHANGE_COOKIE into generic_fillattr.Acked-by: Joseph Qi Reviewed-by: Xiubo Li Reviewed-by: "Paulo Alcantara (SUSE)" Reviewed-by: Jan Kara Signed-off-by: Jeff Layton Message-Id: <20230807-mgctime-v7-2-d1dec143a704@kernel.org>Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/proc/proc_net.c

18e66ae6 - proc: use generic setattr() for /proc/$PID/net

Sat, 24 Jun 2023 10:30:47 +0000

proc: use generic setattr() for /proc/$PID/netAll other files in /proc/$PID/ use proc_setattr().Not using it allows the usage of chmod() on /proc/$PID/net, even onother processes owned by the same user.The same would probably also be true for other attributes to be changed.As this technically represents an ABI change it is not marked forstable so any unlikely regressions are caught during a full release cycle.Fixes: e9720acd728a ("[NET]: Make /proc/net a symlink on /proc/self/net (v3)")Signed-off-by: Thomas Weißschuh Link: https://lore.kernel.org/lkml/d0d111ef-edae-4760-83fb-36db84278da1@t-8ch.de/Fixes: b4844fa0bdb4 ("selftests/nolibc: implement a few tests for various syscalls")Tested-by: Zhangjin Wu Signed-off-by: Willy Tarreau Message-Id: <20230624-proc-net-setattr-v1-2-73176812adee@weissschuh.net>Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/proc/proc_net.c

b74d24f7 - fs: port ->getattr() to pass mnt_idmap

Fri, 13 Jan 2023 11:49:12 +0000

fs: port ->getattr() to pass mnt_idmapConvert to struct mnt_idmap.Last cycle we merged the necessary infrastructure in256c8aed2b42 ("fs: introduce dedicated idmap type for mounts").This is just the conversion to struct mnt_idmap.Currently we still pass around the plain namespace that was attached to amount. This is in general pretty convenient but it makes it easy toconflate namespaces that are relevant on the filesystem with namespacesthat are relevent on the mount level. Especially for non-vfs developerswithout detailed knowledge in this area this can be a potential source forbugs.Once the conversion to struct mnt_idmap is done all helpers down to thereally low-level helpers will take a struct mnt_idmap argument instead oftwo namespace arguments. This way it becomes impossible to conflate the twoeliminating the possibility of any bugs. All of the vfs and all filesystemsonly operate on struct mnt_idmap.Acked-by: Dave Chinner Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner (Microsoft) List of files: /linux-6.15/fs/proc/proc_net.c

ed8fb78d - proc: add some (hopefully) insightful comments

Sat, 23 Jul 2022 17:09:07 +0000

proc: add some (hopefully) insightful comments* /proc/${pid}/net status* removing PDE vs last close stuff (again!)* random small stuffLink: https://lkml.kernel.org/r/YtwrM6sDC0OQ53YB@localhost.localdomainSigned-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/proc/proc_net.c

376b0c26 - proc: delete unused includes

Wed, 15 Jun 2022 11:22:06 +0000

proc: delete unused includesThose aren't necessary after seq files won.Link: https://lkml.kernel.org/r/YqnA3mS7KBt8Z4If@localhost.localdomainSigned-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/proc/proc_net.c

70551977 - proc: fix dentry/inode overinstantiating under /proc/${pid}/net

Tue, 10 May 2022 01:29:19 +0000

proc: fix dentry/inode overinstantiating under /proc/${pid}/netWhen a process exits, /proc/${pid}, and /proc/${pid}/net dentries areflushed. However some leaf dentries like /proc/${pid}/net/arp_cachearen't. That's because respective PDEs have proc_misc_d_revalidate() hookwhich returns 1 and leaves dentries/inodes in the LRU.Force revalidation/lookup on everything under /proc/${pid}/net byinheriting proc_net_dentry_ops.[akpm@linux-foundation.org: coding-style cleanups]Link: https://lkml.kernel.org/r/YjdVHgildbWO7diJ@localhost.localdomainFixes: c6c75deda813 ("proc: fix lookup in /proc/net subdirectories after setns(2)")Signed-off-by: Alexey Dobriyan Reported-by: hui li Cc: Al Viro Signed-off-by: Andrew Morton List of files: /linux-6.15/fs/proc/proc_net.c

359745d7 - proc: remove PDE_DATA() completely

Sat, 22 Jan 2022 06:14:23 +0000

proc: remove PDE_DATA() completelyRemove PDE_DATA() completely and replace it with pde_data().[akpm@linux-foundation.org: fix naming clash in drivers/nubus/proc.c][akpm@linux-foundation.org: now fix it properly]Link: https://lkml.kernel.org/r/20211124081956.87711-2-songmuchun@bytedance.comSigned-off-by: Muchun Song Acked-by: Christian Brauner Cc: Alexey Dobriyan Cc: Alexey Gladkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/proc_net.c

04a931e5 - net: add netns refcount tracker to struct seq_net_private

Fri, 10 Dec 2021 07:44:23 +0000

net: add netns refcount tracker to struct seq_net_privateSigned-off-by: Eric Dumazet Signed-off-by: Jakub Kicinski List of files: /linux-6.15/fs/proc/proc_net.c

549c7297 - fs: make helpers idmap mount aware

Thu, 21 Jan 2021 13:19:43 +0000

fs: make helpers idmap mount awareExtend some inode methods with an additional user namespace argument. Afilesystem that is aware of idmapped mounts will receive the usernamespace the mount has been marked with. This can be used foradditional permission checking and also to enable filesystems totranslate between uids and gids if they need to. We have implemented allrelevant helpers in earlier patches.As requested we simply extend the exisiting inode method instead ofintroducing new ones. This is a little more code churn but it's mostlymechanical and doesnt't leave us with additional inode methods.Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.comCc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.orgReviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/proc/proc_net.c

0d56a451 - stat: handle idmapped mounts

Thu, 21 Jan 2021 13:19:30 +0000

stat: handle idmapped mountsThe generic_fillattr() helper fills in the basic attributes associatedwith an inode. Enable it to handle idmapped mounts. If the inode isaccessed through an idmapped mount map it into the mount's usernamespace before we store the uid and gid. If the initial user namespaceis passed nothing changes so non-idmapped mounts will see identicalbehavior as before.Link: https://lore.kernel.org/r/20210121131959.646623-12-christian.brauner@ubuntu.comCc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.orgReviewed-by: Christoph Hellwig Reviewed-by: James Morris Signed-off-by: Christian Brauner List of files: /linux-6.15/fs/proc/proc_net.c

c6c75ded - proc: fix lookup in /proc/net subdirectories after setns(2)

Wed, 16 Dec 2020 04:42:39 +0000

proc: fix lookup in /proc/net subdirectories after setns(2)Commit 1fde6f21d90f ("proc: fix /proc/net/* after setns(2)") only forcedrevalidation of regular files under /proc/net/However, /proc/net/ is unusual in the sense of /proc/net/foo handlerstake netns pointer from parent directory which is old netns.Steps to reproduce: (void)open("/proc/net/sctp/snmp", O_RDONLY); unshare(CLONE_NEWNET); int fd = open("/proc/net/sctp/snmp", O_RDONLY); read(fd, &c, 1);Read will read wrong data from original netns.Patch forces lookup on every directory under /proc/net .Link: https://lkml.kernel.org/r/20201205160916.GA109739@localhost.localdomainFixes: 1da4d377f943 ("proc: revalidate misc dentries")Signed-off-by: Alexey Dobriyan Reported-by: "Rantala, Tommi T. (Nokia - FI/Espoo)" Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/proc_net.c

d2928e85 - procfs: delete duplicated words + other fixes

Wed, 16 Dec 2020 04:42:32 +0000

procfs: delete duplicated words + other fixesDelete repeated words in fs/proc/.{the, which}where "which which" was changed to "with which".Link: https://lkml.kernel.org/r/20201028191525.13413-1-rdunlap@infradead.orgSigned-off-by: Randy Dunlap Cc: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/proc_net.c

f9c79272 - bpf: Refactor to provide aux info to bpf_iter_init_seq_priv_t

Thu, 23 Jul 2020 18:41:10 +0000

bpf: Refactor to provide aux info to bpf_iter_init_seq_priv_tThis patch refactored target bpf_iter_init_seq_priv_t callbackfunction to accept additional information. This will be neededin later patches for map element targets since a particularmap should be passed to traverse elements for that particularmap. In the future, other information may be passed to targetas well, e.g., pid, cgroup id, etc. to customize the iterator.Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200723184110.590156-1-yhs@fb.com List of files: /linux-6.15/fs/proc/proc_net.c

138d0be3 - net: bpf: Add netlink and ipv6_route bpf_iter targets

Sat, 09 May 2020 17:59:10 +0000

net: bpf: Add netlink and ipv6_route bpf_iter targetsThis patch added netlink and ipv6_route targets, usingthe same seq_ops (except show() and minor changes for stop())for /proc/net/{netlink,ipv6_route}.The net namespace for these targets are the current netnamespace at file open stage, similar to/proc/net/{netlink,ipv6_route} reference countingthe net namespace at seq_file open stage.Since module is not supported for now, ipv6_route issupported only if the IPV6 is built-in, i.e., not compiledas a module. The restriction can be lifted once moduleis properly supported for bpf_iter.Signed-off-by: Yonghong Song Signed-off-by: Alexei Starovoitov Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20200509175910.2476329-1-yhs@fb.com List of files: /linux-6.15/fs/proc/proc_net.c

d56c0d45 - proc: decouple proc from VFS with "struct proc_ops"

Tue, 04 Feb 2020 01:37:14 +0000

proc: decouple proc from VFS with "struct proc_ops"Currently core /proc code uses "struct file_operations" for custom hooks,however, VFS doesn't directly call them. Every time VFS expandsfile_operations hook set, /proc code bloats for no reason.Introduce "struct proc_ops" which contains only those hooks which /procallows to call into (open, release, read, write, ioctl, mmap, poll). Itdoesn't contain module pointer as well.Save ~184 bytes per usage: add/remove: 26/26 grow/shrink: 1/4 up/down: 1922/-6674 (-4752) Function old new delta sysvipc_proc_ops - 72 +72 ... config_gz_proc_ops - 72 +72 proc_get_inode 289 339 +50 proc_reg_get_unmapped_area 110 107 -3 close_pdeo 227 224 -3 proc_reg_open 289 284 -5 proc_create_data 60 53 -7 rt_cpu_seq_fops 256 - -256 ... default_affinity_proc_fops 256 - -256 Total: Before=5430095, After=5425343, chg -0.09%Link: http://lkml.kernel.org/r/20191225172228.GA13378@avx2Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/proc_net.c

457c8996 - treewide: Add SPDX license identifier for missed files

Sun, 19 May 2019 12:08:55 +0000

treewide: Add SPDX license identifier for missed filesAdd SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the fileThese files fall under the project license, GPL v2 only. The resulting SPDXlicense identifier is: GPL-2.0-onlySigned-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman List of files: /linux-6.15/fs/proc/proc_net.c

1fde6f21 - proc: fix /proc/net/* after setns(2)

Fri, 01 Feb 2019 22:20:01 +0000

proc: fix /proc/net/* after setns(2)/proc entries under /proc/net/* can't be cached into dcache becausesetns(2) can change current net namespace.[akpm@linux-foundation.org: coding-style fixes][akpm@linux-foundation.org: avoid vim miscolorization][adobriyan@gmail.com: write test, add dummy ->d_revalidate hook: necessary if /proc/net/* is pinned at setns time] Link: http://lkml.kernel.org/r/20190108192350.GA12034@avx2Link: http://lkml.kernel.org/r/20190107162336.GA9239@avx2Fixes: 1da4d377f943fe4194ffb9fb9c26cc58fad4dd24 ("proc: revalidate misc dentries")Signed-off-by: Alexey Dobriyan Reported-by: Mateusz Stępień Reported-by: Ahmad Fatoum Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/fs/proc/proc_net.c

564def71 - proc: Add a way to make network proc files writable

Fri, 18 May 2018 10:46:15 +0000

proc: Add a way to make network proc files writableProvide two extra functions, proc_create_net_data_write() andproc_create_net_single_write() that act like their non-write versions butalso set a write method in the proc_dir_entry struct.An internal simple write function is provided that will copy its buffer andhand it to the pde->write() method if available (or give an error if not).The buffer may be modified by the write method.Signed-off-by: David Howells List of files: /linux-6.15/fs/proc/proc_net.c

3617d949 - proc: introduce proc_create_net_single

Fri, 13 Apr 2018 18:38:35 +0000

proc: introduce proc_create_net_singleVariant of proc_create_data that directly take a seq_file showcallback and deals with network namespaces in ->open and ->release.All callers of proc_create + single_open_net converted over, andsingle_{open,release}_net are removed entirely.Signed-off-by: Christoph Hellwig List of files: /linux-6.15/fs/proc/proc_net.c