Contributors: 49
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Hugh Dickins |
285 |
29.05% |
19 |
19.59% |
| Kirill A. Shutemov |
104 |
10.60% |
5 |
5.15% |
| Linus Torvalds (pre-git) |
101 |
10.30% |
7 |
7.22% |
| Carlos Maiolino |
46 |
4.69% |
2 |
2.06% |
| Mike Rapoport |
41 |
4.18% |
1 |
1.03% |
| Linus Torvalds |
35 |
3.57% |
4 |
4.12% |
| Bang Li |
35 |
3.57% |
1 |
1.03% |
| Andrew Morton |
34 |
3.47% |
4 |
4.12% |
| Matthew Wilcox |
28 |
2.85% |
4 |
4.12% |
| Lukas Czerner |
26 |
2.65% |
1 |
1.03% |
| David Howells |
26 |
2.65% |
3 |
3.09% |
| Vlastimil Babka |
21 |
2.14% |
2 |
2.06% |
| Theodore Y. Ts'o |
15 |
1.53% |
1 |
1.03% |
| Matt Mackall |
15 |
1.53% |
2 |
2.06% |
| Sumanth Korikkar |
14 |
1.43% |
1 |
1.03% |
| Chris Down |
14 |
1.43% |
2 |
2.06% |
| David L Stevens |
13 |
1.33% |
1 |
1.03% |
| Axel Rasmussen |
11 |
1.12% |
2 |
2.06% |
| Kay Sievers |
10 |
1.02% |
1 |
1.03% |
| Tim Chen |
9 |
0.92% |
1 |
1.03% |
| Zach O'Keefe |
8 |
0.82% |
1 |
1.03% |
| Eric Paris |
7 |
0.71% |
2 |
2.06% |
| Steven Price |
7 |
0.71% |
1 |
1.03% |
| Matthew Auld |
7 |
0.71% |
1 |
1.03% |
| Xavier Roche |
6 |
0.61% |
1 |
1.03% |
| Vineeth Remanan Pillai |
5 |
0.51% |
2 |
2.06% |
| Lee Schermerhorn |
5 |
0.51% |
1 |
1.03% |
| Badari Pulavarty |
5 |
0.51% |
1 |
1.03% |
| David Herrmann |
5 |
0.51% |
1 |
1.03% |
| Andreas Gruenbacher |
4 |
0.41% |
1 |
1.03% |
| Luis R. Rodriguez |
4 |
0.41% |
1 |
1.03% |
| Aristeu Sergio Rozanski Filho |
3 |
0.31% |
1 |
1.03% |
| ZhangPeng |
3 |
0.31% |
1 |
1.03% |
| Christoph Hellwig |
3 |
0.31% |
2 |
2.06% |
| Al Viro |
3 |
0.31% |
2 |
2.06% |
| Andrea Arcangeli |
3 |
0.31% |
1 |
1.03% |
| Chuck Lever |
3 |
0.31% |
1 |
1.03% |
| Eric W. Biedermann |
2 |
0.20% |
1 |
1.03% |
| Peter Xu |
2 |
0.20% |
1 |
1.03% |
| Alexey Gladkov |
2 |
0.20% |
1 |
1.03% |
| Alexey Dobriyan |
2 |
0.20% |
1 |
1.03% |
| Johannes Weiner |
2 |
0.20% |
1 |
1.03% |
| Baolin Wang |
1 |
0.10% |
1 |
1.03% |
| Miaohe Lin |
1 |
0.10% |
1 |
1.03% |
| Sebastian Andrzej Siewior |
1 |
0.10% |
1 |
1.03% |
| Neil Brown |
1 |
0.10% |
1 |
1.03% |
| Robin Holt |
1 |
0.10% |
1 |
1.03% |
| Jan Kara |
1 |
0.10% |
1 |
1.03% |
| Greg Kroah-Hartman |
1 |
0.10% |
1 |
1.03% |
| Total |
981 |
|
97 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SHMEM_FS_H
#define __SHMEM_FS_H
#include <linux/file.h>
#include <linux/swap.h>
#include <linux/mempolicy.h>
#include <linux/pagemap.h>
#include <linux/percpu_counter.h>
#include <linux/xattr.h>
#include <linux/fs_parser.h>
#include <linux/userfaultfd_k.h>
/* inode in-kernel data */
#ifdef CONFIG_TMPFS_QUOTA
#define SHMEM_MAXQUOTAS 2
#endif
struct shmem_inode_info {
spinlock_t lock;
unsigned int seals; /* shmem seals */
unsigned long flags;
unsigned long alloced; /* data pages alloced to file */
unsigned long swapped; /* subtotal assigned to swap */
union {
struct offset_ctx dir_offsets; /* stable directory offsets */
struct {
struct list_head shrinklist; /* shrinkable hpage inodes */
struct list_head swaplist; /* chain of maybes on swap */
};
};
struct timespec64 i_crtime; /* file creation time */
struct shared_policy policy; /* NUMA memory alloc policy */
struct simple_xattrs xattrs; /* list of xattrs */
pgoff_t fallocend; /* highest fallocate endindex */
unsigned int fsflags; /* for FS_IOC_[SG]ETFLAGS */
atomic_t stop_eviction; /* hold when working on inode */
#ifdef CONFIG_TMPFS_QUOTA
struct dquot __rcu *i_dquot[MAXQUOTAS];
#endif
struct inode vfs_inode;
};
#define SHMEM_FL_USER_VISIBLE FS_FL_USER_VISIBLE
#define SHMEM_FL_USER_MODIFIABLE \
(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NODUMP_FL | FS_NOATIME_FL)
#define SHMEM_FL_INHERITED (FS_NODUMP_FL | FS_NOATIME_FL)
struct shmem_quota_limits {
qsize_t usrquota_bhardlimit; /* Default user quota block hard limit */
qsize_t usrquota_ihardlimit; /* Default user quota inode hard limit */
qsize_t grpquota_bhardlimit; /* Default group quota block hard limit */
qsize_t grpquota_ihardlimit; /* Default group quota inode hard limit */
};
struct shmem_sb_info {
unsigned long max_blocks; /* How many blocks are allowed */
struct percpu_counter used_blocks; /* How many are allocated */
unsigned long max_inodes; /* How many inodes are allowed */
unsigned long free_ispace; /* How much ispace left for allocation */
raw_spinlock_t stat_lock; /* Serialize shmem_sb_info changes */
umode_t mode; /* Mount mode for root directory */
unsigned char huge; /* Whether to try for hugepages */
kuid_t uid; /* Mount uid for root directory */
kgid_t gid; /* Mount gid for root directory */
bool full_inums; /* If i_ino should be uint or ino_t */
bool noswap; /* ignores VM reclaim / swap requests */
ino_t next_ino; /* The next per-sb inode number to use */
ino_t __percpu *ino_batch; /* The next per-cpu inode number to use */
struct mempolicy *mpol; /* default memory policy for mappings */
spinlock_t shrinklist_lock; /* Protects shrinklist */
struct list_head shrinklist; /* List of shinkable inodes */
unsigned long shrinklist_len; /* Length of shrinklist */
struct shmem_quota_limits qlimits; /* Default quota limits */
};
static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
{
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
/*
* Functions in mm/shmem.c called directly from elsewhere:
*/
extern const struct fs_parameter_spec shmem_fs_parameters[];
extern void shmem_init(void);
extern int shmem_init_fs_context(struct fs_context *fc);
extern struct file *shmem_file_setup(const char *name,
loff_t size, unsigned long flags);
extern struct file *shmem_kernel_file_setup(const char *name, loff_t size,
unsigned long flags);
extern struct file *shmem_file_setup_with_mnt(struct vfsmount *mnt,
const char *name, loff_t size, unsigned long flags);
extern int shmem_zero_setup(struct vm_area_struct *);
extern unsigned long shmem_get_unmapped_area(struct file *, unsigned long addr,
unsigned long len, unsigned long pgoff, unsigned long flags);
extern int shmem_lock(struct file *file, int lock, struct ucounts *ucounts);
#ifdef CONFIG_SHMEM
bool shmem_mapping(struct address_space *mapping);
#else
static inline bool shmem_mapping(struct address_space *mapping)
{
return false;
}
#endif /* CONFIG_SHMEM */
extern void shmem_unlock_mapping(struct address_space *mapping);
extern struct page *shmem_read_mapping_page_gfp(struct address_space *mapping,
pgoff_t index, gfp_t gfp_mask);
extern void shmem_truncate_range(struct inode *inode, loff_t start, loff_t end);
int shmem_unuse(unsigned int type);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
struct mm_struct *mm, unsigned long vm_flags);
unsigned long shmem_allowable_huge_orders(struct inode *inode,
struct vm_area_struct *vma, pgoff_t index,
bool global_huge);
#else
static __always_inline bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
struct mm_struct *mm, unsigned long vm_flags)
{
return false;
}
static inline unsigned long shmem_allowable_huge_orders(struct inode *inode,
struct vm_area_struct *vma, pgoff_t index,
bool global_huge)
{
return 0;
}
#endif
#ifdef CONFIG_SHMEM
extern unsigned long shmem_swap_usage(struct vm_area_struct *vma);
#else
static inline unsigned long shmem_swap_usage(struct vm_area_struct *vma)
{
return 0;
}
#endif
extern unsigned long shmem_partial_swap_usage(struct address_space *mapping,
pgoff_t start, pgoff_t end);
/* Flag allocation requirements to shmem_get_folio */
enum sgp_type {
SGP_READ, /* don't exceed i_size, don't allocate page */
SGP_NOALLOC, /* similar, but fail on hole or use fallocated page */
SGP_CACHE, /* don't exceed i_size, may allocate page */
SGP_WRITE, /* may exceed i_size, may allocate !Uptodate page */
SGP_FALLOC, /* like SGP_WRITE, but make existing page Uptodate */
};
int shmem_get_folio(struct inode *inode, pgoff_t index, struct folio **foliop,
enum sgp_type sgp);
struct folio *shmem_read_folio_gfp(struct address_space *mapping,
pgoff_t index, gfp_t gfp);
static inline struct folio *shmem_read_folio(struct address_space *mapping,
pgoff_t index)
{
return shmem_read_folio_gfp(mapping, index, mapping_gfp_mask(mapping));
}
static inline struct page *shmem_read_mapping_page(
struct address_space *mapping, pgoff_t index)
{
return shmem_read_mapping_page_gfp(mapping, index,
mapping_gfp_mask(mapping));
}
static inline bool shmem_file(struct file *file)
{
if (!IS_ENABLED(CONFIG_SHMEM))
return false;
if (!file || !file->f_mapping)
return false;
return shmem_mapping(file->f_mapping);
}
/*
* If fallocate(FALLOC_FL_KEEP_SIZE) has been used, there may be pages
* beyond i_size's notion of EOF, which fallocate has committed to reserving:
* which split_huge_page() must therefore not delete. This use of a single
* "fallocend" per inode errs on the side of not deleting a reservation when
* in doubt: there are plenty of cases when it preserves unreserved pages.
*/
static inline pgoff_t shmem_fallocend(struct inode *inode, pgoff_t eof)
{
return max(eof, SHMEM_I(inode)->fallocend);
}
extern bool shmem_charge(struct inode *inode, long pages);
extern void shmem_uncharge(struct inode *inode, long pages);
#ifdef CONFIG_USERFAULTFD
#ifdef CONFIG_SHMEM
extern int shmem_mfill_atomic_pte(pmd_t *dst_pmd,
struct vm_area_struct *dst_vma,
unsigned long dst_addr,
unsigned long src_addr,
uffd_flags_t flags,
struct folio **foliop);
#else /* !CONFIG_SHMEM */
#define shmem_mfill_atomic_pte(dst_pmd, dst_vma, dst_addr, \
src_addr, flags, foliop) ({ BUG(); 0; })
#endif /* CONFIG_SHMEM */
#endif /* CONFIG_USERFAULTFD */
/*
* Used space is stored as unsigned 64-bit value in bytes but
* quota core supports only signed 64-bit values so use that
* as a limit
*/
#define SHMEM_QUOTA_MAX_SPC_LIMIT 0x7fffffffffffffffLL /* 2^63-1 */
#define SHMEM_QUOTA_MAX_INO_LIMIT 0x7fffffffffffffffLL
#ifdef CONFIG_TMPFS_QUOTA
extern const struct dquot_operations shmem_quota_operations;
extern struct quota_format_type shmem_quota_format;
#endif /* CONFIG_TMPFS_QUOTA */
#endif