include/linux/quotaops.h
Source file repositories/reference/linux-study-clean/include/linux/quotaops.h
File Facts
- System
- Linux kernel
- Corpus path
include/linux/quotaops.h- Extension
.h- Size
- 10287 bytes
- Lines
- 395
- Domain
- Core OS
- Bucket
- Core Kernel Interface
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/fs.h
Detected Declarations
function is_quota_modificationfunction dquot_is_busyfunction dquot_suspendfunction sb_has_quota_usage_enabledfunction sb_has_quota_limits_enabledfunction sb_has_quota_suspendedfunction sb_any_quota_suspendedfunction sb_has_quota_loadedfunction sb_any_quota_loadedfunction sb_has_quota_activefunction sb_has_quota_usage_enabledfunction sb_has_quota_limits_enabledfunction sb_has_quota_suspendedfunction sb_any_quota_suspendedfunction sb_has_quota_loadedfunction sb_any_quota_loadedfunction sb_has_quota_activefunction dquot_initializefunction dquot_initialize_neededfunction dquot_dropfunction dquot_free_inodefunction __dquot_alloc_spacefunction __dquot_free_spacefunction dquot_claim_space_nodirtyfunction dquot_reclaim_space_nodirtyfunction dquot_disablefunction dquot_suspendfunction dquot_resumefunction dquot_writeback_dquotsfunction dquot_alloc_space_nodirtyfunction dquot_alloc_space_nofailfunction dquot_alloc_spacefunction dquot_alloc_block_nodirtyfunction dquot_alloc_block_nofailfunction dquot_alloc_blockfunction dquot_prealloc_block_nodirtyfunction dquot_prealloc_blockfunction dquot_reserve_blockfunction dquot_claim_blockfunction dquot_reclaim_blockfunction dquot_free_space_nodirtyfunction dquot_free_spacefunction dquot_free_block_nodirtyfunction dquot_free_blockfunction dquot_release_reservation_block
Annotated Snippet
#ifndef _LINUX_QUOTAOPS_
#define _LINUX_QUOTAOPS_
#include <linux/fs.h>
#define DQUOT_SPACE_WARN 0x1
#define DQUOT_SPACE_RESERVE 0x2
#define DQUOT_SPACE_NOFAIL 0x4
static inline struct quota_info *sb_dqopt(struct super_block *sb)
{
return &sb->s_dquot;
}
/* i_rwsem must being held */
static inline bool is_quota_modification(struct mnt_idmap *idmap,
struct inode *inode, struct iattr *ia)
{
return ((ia->ia_valid & ATTR_SIZE) ||
i_uid_needs_update(idmap, ia, inode) ||
i_gid_needs_update(idmap, ia, inode));
}
#if defined(CONFIG_QUOTA)
#define quota_error(sb, fmt, args...) \
__quota_error((sb), __func__, fmt , ## args)
extern __printf(3, 4)
void __quota_error(struct super_block *sb, const char *func,
const char *fmt, ...);
/*
* declaration of quota_function calls in kernel.
*/
int dquot_initialize(struct inode *inode);
bool dquot_initialize_needed(struct inode *inode);
void dquot_drop(struct inode *inode);
struct dquot *dqget(struct super_block *sb, struct kqid qid);
struct dquot *dqgrab(struct dquot *dquot);
static inline bool dquot_is_busy(struct dquot *dquot)
{
if (test_bit(DQ_MOD_B, &dquot->dq_flags))
return true;
if (atomic_read(&dquot->dq_count) > 0)
return true;
return false;
}
void dqput(struct dquot *dquot);
int dquot_scan_active(struct super_block *sb,
int (*fn)(struct dquot *dquot, unsigned long priv),
unsigned long priv);
struct dquot *dquot_alloc(struct super_block *sb, int type);
void dquot_destroy(struct dquot *dquot);
int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
int dquot_alloc_inode(struct inode *inode);
void dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
void dquot_free_inode(struct inode *inode);
void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
int dquot_disable(struct super_block *sb, int type, unsigned int flags);
/* Suspend quotas on remount RO */
static inline int dquot_suspend(struct super_block *sb, int type)
{
return dquot_disable(sb, type, DQUOT_SUSPENDED);
}
int dquot_resume(struct super_block *sb, int type);
int dquot_commit(struct dquot *dquot);
int dquot_acquire(struct dquot *dquot);
int dquot_release(struct dquot *dquot);
int dquot_commit_info(struct super_block *sb, int type);
int dquot_get_next_id(struct super_block *sb, struct kqid *qid);
int dquot_mark_dquot_dirty(struct dquot *dquot);
int dquot_file_open(struct inode *inode, struct file *file);
int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
unsigned int flags);
int dquot_load_quota_inode(struct inode *inode, int type, int format_id,
unsigned int flags);
int dquot_quota_on(struct super_block *sb, int type, int format_id,
const struct path *path);
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
Annotation
- Immediate include surface: `linux/fs.h`.
- Detected declarations: `function is_quota_modification`, `function dquot_is_busy`, `function dquot_suspend`, `function sb_has_quota_usage_enabled`, `function sb_has_quota_limits_enabled`, `function sb_has_quota_suspended`, `function sb_any_quota_suspended`, `function sb_has_quota_loaded`, `function sb_any_quota_loaded`, `function sb_has_quota_active`.
- Atlas domain: Core OS / Core Kernel Interface.
- 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.