fs/jfs/acl.c

File Facts

System

Linux kernel

Corpus path

fs/jfs/acl.c

Extension

.c

Size

3201 bytes

Lines

154

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: implementation source

Status

source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/sched.h
• linux/slab.h
• linux/fs.h
• linux/posix_acl_xattr.h
• jfs_incore.h
• jfs_txnmgr.h
• jfs_xattr.h
• jfs_acl.h

Detected Declarations

• function Copyright
• function __jfs_set_acl
• function jfs_set_acl
• function jfs_init_acl

Annotated Snippet

if (update_mode) {
			inode->i_mode = mode;
			inode_set_ctime_current(inode);
			mark_inode_dirty(inode);
		}
		rc = txCommit(tid, 1, &inode, 0);
	}
end_tx:
	txEnd(tid);
	mutex_unlock(&JFS_IP(inode)->commit_mutex);
	return rc;
}

int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
{
	struct posix_acl *default_acl, *acl;
	int rc = 0;

	rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
	if (rc)
		return rc;

	if (default_acl) {
		rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
		posix_acl_release(default_acl);
	} else {
		inode->i_default_acl = NULL;
	}

	if (acl) {
		if (!rc)
			rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
		posix_acl_release(acl);
	} else {
		inode->i_acl = NULL;
	}

	JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
			       inode->i_mode;

	return rc;
}

Annotation

• Immediate include surface: `linux/sched.h`, `linux/slab.h`, `linux/fs.h`, `linux/posix_acl_xattr.h`, `jfs_incore.h`, `jfs_txnmgr.h`, `jfs_xattr.h`, `jfs_acl.h`.
• Detected declarations: `function Copyright`, `function __jfs_set_acl`, `function jfs_set_acl`, `function jfs_init_acl`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.