fs/ufs/util.h

File Facts

System

Linux kernel

Corpus path

fs/ufs/util.h

Extension

.h

Size

16056 bytes

Lines

598

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.
• 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/buffer_head.h
• linux/fs.h
• swab.h

Detected Declarations

• function Copyright
• function ufs_get_fs_state
• function ufs_set_fs_state
• function ufs_get_fs_npsect
• function ufs_get_fs_qbmask
• function ufs_get_fs_qfmask
• function ufs_get_de_namlen
• function ufs_set_de_namlen
• function ufs_set_de_type
• function ufs_get_inode_uid
• function ufs_set_inode_uid
• function ufs_get_inode_gid
• function ufs_set_inode_gid
• function ufs_put_locked_folio
• function ufs_freefrags
• function _ubh_find_next_zero_bit_
• function find_last_zero_bit
• function _ubh_find_last_zero_bit_
• function ubh_isblockset
• function ubh_clrblock
• function ubh_setblock
• function ufs_fragacct
• function ufs_data_ptr_to_cpu
• function ufs_cpu_to_data_ptr
• function ufs_data_ptr_clear
• function ufs_is_data_ptr_zero
• function ufs_get_seconds

Annotated Snippet

if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
			break;
		}
		fallthrough;	/* to UFS_ST_SUN */
	case UFS_ST_SUN:
		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
		break;
	case UFS_ST_SUNx86:
		usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
		break;
	case UFS_ST_44BSD:
		usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
		break;
	}
}

static inline u32
ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
		  struct ufs_super_block_third *usb3)
{
	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
		return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
	else
		return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
}

static inline u64
ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
{
	__fs64 tmp;

	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
	case UFS_ST_SUN:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
		break;
	case UFS_ST_SUNx86:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
		break;
	case UFS_ST_44BSD:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
		break;
	}

	return fs64_to_cpu(sb, tmp);
}

static inline u64
ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
{
	__fs64 tmp;

	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
	case UFS_ST_SUN:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
		break;
	case UFS_ST_SUNx86:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
		break;
	case UFS_ST_44BSD:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
		break;
	}

	return fs64_to_cpu(sb, tmp);
}

static inline u16
ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
{
	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
		return fs16_to_cpu(sb, de->d_u.d_namlen);
	else
		return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
}

static inline void
ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
{
	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
		de->d_u.d_namlen = cpu_to_fs16(sb, value);
	else

Annotation

• Immediate include surface: `linux/buffer_head.h`, `linux/fs.h`, `swab.h`.
• Detected declarations: `function Copyright`, `function ufs_get_fs_state`, `function ufs_set_fs_state`, `function ufs_get_fs_npsect`, `function ufs_get_fs_qbmask`, `function ufs_get_fs_qfmask`, `function ufs_get_de_namlen`, `function ufs_set_de_namlen`, `function ufs_set_de_type`, `function ufs_get_inode_uid`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: source implementation candidate.

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.