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10 commits

Author SHA1 Message Date
zhengyu16
ebfe22bfb9 fs: rename PSEUDOFS_SOFTLINKS to FS_LINKS 
The link support is no longer limited to the pseudo file system and now
covers both soft (symbolic) links and hard links across the VFS.  Rename
the configuration option PSEUDOFS_SOFTLINKS to the more accurate FS_LINKS
and update all references in the source, headers, Kconfig, documentation
and board defconfigs accordingly.

This is a configuration rename; any out-of-tree defconfig that still
selects PSEUDOFS_SOFTLINKS must be updated to FS_LINKS.

Signed-off-by: zhengyu16 <zhengyu16@xiaomi.com>
 2026-08-27 01:12:33 +08:00
zhengyu16
3d09479367 fs/vfs: add hardlink function of pseudofs 
1. add the hardlink function
2. _POSIX_LINK_MAX judgement

Signed-off-by: zhengyu16 <zhengyu16@xiaomi.com>
 2026-08-27 01:12:33 +08:00
Abhishek Mishra
08afc5f2cf fs: enforce path search and unify inode permission helpers 
Require X_OK on path ancestors and mountpoint gates via
inode_checkpathperm(), and use inode_checkperm() for inode mode checks.
inode_checkpathperm() takes the inode tree read lock (or INODE_CHECK_LOCKED
when the caller already holds it) and can fold a non-zero amode check onto
the target inode in the same call.

When CONFIG_FS_PERMISSION is disabled, inode_checkperm/inode_checkpathperm
are empty macros returning 0 so there is no stub .text cost.

Skip mountpoint R/W open-mode checks in inode_checkopenperm(); keep
traversal separate from open.  Add an optional mountpt_operations.permission
hook (tmpfs when CONFIG_FS_PERMISSION) for in-volume DAC without making the
VFS mount-crossing path depend on it.

Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
 2026-08-02 18:48:40 -03:00
Abhishek Mishra
25d7207721 fs/vfs: validate chmod and chown callers in inode_chstat() 
Add pseudoFS caller validation for chmod and chown operations
using the caller's effective uid. Align behavior with POSIX
semantics by allowing owner/root chmod and root-only chown.

Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
 2026-05-28 09:36:51 +08:00
Alin Jerpelea
6833b8787e fs: migrate to SPDX identifier 
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
 2024-11-06 01:58:54 +08:00
dongjiuzhu1
a2845faee3 fs/chmod/fchmod/lchmod: only set permissions by mode_t and ignore other bits 
test case:

int main(void)
{
  struct stat buf;
  int ret;

  stat("test1.t", &buf);
  printf("test1.t st.mode:%x\n", buf.st_mode);
  stat("test.t", &buf);
  printf("test.t st.mode:%x\n", buf.st_mode);
  ret = chmod("test1.t", buf.st_mode);
  if (ret == 0)
    {
      stat("test1.t", &buf);
      printf("test1.t st.mode:%x\n", buf.st_mode);
    }

  return 0;
}

>>
test1.t st.mode:81b4
test.t st.mode:81fd
test1.t st.mode:81fd

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
 2024-09-23 14:57:37 +08:00
Nathan Hartman
849f760b77 Fix various typos 2022-07-08 02:15:54 +08:00
yinshengkai
4b6743591a fs/vfs: fix st_mode mask check 
The full mask for st_mode is 0177777
Now modify any file permissions in hostfs and all will fail
 2022-04-08 15:06:41 +03:00
Xiang Xiao
6c61d032db fs: Add utimens and lutimens 
https://pubs.opengroup.org/onlinepubs/9699919799/functions/futimens.html
https://www.daemon-systems.org/man/utimens.2.html

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
 2021-08-09 17:55:44 -03:00
Xiang Xiao
307cc61893 fs: Add fchstat and chstat callback into mountpt_operations 
and implement all status related change function. the individual
file system change will provide in other upcoming patchset.

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
Change-Id: I8fde9db8eba9586e9c8da078b67e020c26623cf4
 2021-07-29 06:33:49 -03:00