Release 4.12 include/linux/shmem_fs.h
#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>
/* inode in-kernel data */
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 */
struct list_head shrinklist; /* shrinkable hpage inodes */
struct list_head swaplist; /* chain of maybes on swap */
struct shared_policy policy; /* NUMA memory alloc policy */
struct simple_xattrs xattrs; /* list of xattrs */
struct inode vfs_inode;
};
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_inodes; /* How many are left for allocation */
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 */
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 */
};
static inline struct shmem_inode_info *SHMEM_I(struct inode *inode)
{
return container_of(inode, struct shmem_inode_info, vfs_inode);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds | 24 | 96.00% | 2 | 66.67% |
| Neil Brown | 1 | 4.00% | 1 | 33.33% |
| Total | 25 | 100.00% | 3 | 100.00% |
/*
* Functions in mm/shmem.c called directly from elsewhere:
*/
extern int shmem_init(void);
extern int shmem_fill_super(struct super_block *sb, void *data, int silent);
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 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 user_struct *user);
#ifdef CONFIG_SHMEM
extern bool shmem_mapping(struct address_space *mapping);
#else
static inline bool shmem_mapping(struct address_space *mapping)
{
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hugh Dickins | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
#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);
extern int shmem_unuse(swp_entry_t entry, struct page *page);
extern unsigned long shmem_swap_usage(struct vm_area_struct *vma);
extern unsigned long shmem_partial_swap_usage(struct address_space *mapping,
pgoff_t start, pgoff_t end);
/* Flag allocation requirements to shmem_getpage */
enum sgp_type {
SGP_READ, /* don't exceed i_size, don't allocate page */
SGP_CACHE, /* don't exceed i_size, may allocate page */
SGP_NOHUGE, /* like SGP_CACHE, but no huge pages */
SGP_HUGE, /* like SGP_CACHE, huge pages preferred */
SGP_WRITE, /* may exceed i_size, may allocate !Uptodate page */
SGP_FALLOC, /* like SGP_WRITE, but make existing page Uptodate */
};
extern int shmem_getpage(struct inode *inode, pgoff_t index,
struct page **pagep, enum sgp_type sgp);
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));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hugh Dickins | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
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);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kirill A. Shutemov | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
extern bool shmem_charge(struct inode *inode, long pages);
extern void shmem_uncharge(struct inode *inode, long pages);
#ifdef CONFIG_TMPFS
extern int shmem_add_seals(struct file *file, unsigned int seals);
extern int shmem_get_seals(struct file *file);
extern long shmem_fcntl(struct file *file, unsigned int cmd, unsigned long arg);
#else
static inline long shmem_fcntl(struct file *f, unsigned int c, unsigned long a)
{
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Herrmann | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
#endif
#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
extern bool shmem_huge_enabled(struct vm_area_struct *vma);
#else
static inline bool shmem_huge_enabled(struct vm_area_struct *vma)
{
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Kirill A. Shutemov | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
#endif
#ifdef CONFIG_SHMEM
extern int shmem_mcopy_atomic_pte(struct mm_struct *dst_mm, pmd_t *dst_pmd,
struct vm_area_struct *dst_vma,
unsigned long dst_addr,
unsigned long src_addr,
struct page **pagep);
#else
#define shmem_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \
src_addr, pagep) ({ BUG(); 0; })
#endif
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Hugh Dickins | 197 | 27.67% | 10 | 27.78% |
| Kirill A. Shutemov | 180 | 25.28% | 5 | 13.89% |
| David Herrmann | 81 | 11.38% | 1 | 2.78% |
| Mike Rapoport | 57 | 8.01% | 1 | 2.78% |
| Linus Torvalds (pre-git) | 46 | 6.46% | 1 | 2.78% |
| Linus Torvalds | 30 | 4.21% | 3 | 8.33% |
| Vlastimil Babka | 28 | 3.93% | 2 | 5.56% |
| Kay Sievers | 23 | 3.23% | 1 | 2.78% |
| Eric Paris | 21 | 2.95% | 2 | 5.56% |
| Andrew Morton | 15 | 2.11% | 2 | 5.56% |
| Johannes Weiner | 10 | 1.40% | 1 | 2.78% |
| Aristeu Sergio Rozanski Filho | 6 | 0.84% | 1 | 2.78% |
| Tim Chen | 6 | 0.84% | 1 | 2.78% |
| Lee Schermerhorn | 5 | 0.70% | 1 | 2.78% |
| Dave Jones | 3 | 0.42% | 1 | 2.78% |
| Eric W. Biedermann | 2 | 0.28% | 1 | 2.78% |
| Neil Brown | 1 | 0.14% | 1 | 2.78% |
| Robin Holt | 1 | 0.14% | 1 | 2.78% |
| Total | 712 | 100.00% | 36 | 100.00% |
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