mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 22:02:02 +00:00
e5e038b7ae
-----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAmXx5kwACgkQnJ2qBz9k QNmZowf/UlGJ1rmQFFhoodn3SyK48tQjOZ23Ygx6v9FZiLMuQ3b1k0kWKmwM4lZb mtRriCm+lPO9Yp/Sflz+jn8S51b/2bcTXiPV4w2Y4ZIun41wwggV7rWPnTCHhu94 rGEPu/SNSBdpxWGv43BKHSDl4XolsGbyusQKBbKZtftnrpIf0y2OnyEXSV91Vnlh KM/XxzacBD4/3r4KCljyEkORWlIIn2+gdZf58sKtxLKvnfCIxjB+BF1e0gOWgmNQ e/pVnzbAHO3wuavRlwnrtA+ekBYQiJq7T61yyYI8zpeSoLHmwvPoKSsZP+q4BTvV yrcVCbGp3uZlXHD93U3BOfdqS0xBmg== =84Q4 -----END PGP SIGNATURE----- Merge tag 'fs_for_v6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull ext2, isofs, udf, and quota updates from Jan Kara: "A lot of material this time: - removal of a lot of GFP_NOFS usage from ext2, udf, quota (either it was legacy or replaced with scoped memalloc_nofs_*() API) - removal of BUG_ONs in quota code - conversion of UDF to the new mount API - tightening quota on disk format verification - fix some potentially unsafe use of RCU pointers in quota code and annotate everything properly to make sparse happy - a few other small quota, ext2, udf, and isofs fixes" * tag 'fs_for_v6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: (26 commits) udf: remove SLAB_MEM_SPREAD flag usage quota: remove SLAB_MEM_SPREAD flag usage isofs: remove SLAB_MEM_SPREAD flag usage ext2: remove SLAB_MEM_SPREAD flag usage ext2: mark as deprecated udf: convert to new mount API udf: convert novrs to an option flag MAINTAINERS: add missing git address for ext2 entry quota: Detect loops in quota tree quota: Properly annotate i_dquot arrays with __rcu quota: Fix rcu annotations of inode dquot pointers isofs: handle CDs with bad root inode but good Joliet root directory udf: Avoid invalid LVID used on mount quota: Fix potential NULL pointer dereference quota: Drop GFP_NOFS instances under dquot->dq_lock and dqio_sem quota: Set nofs allocation context when acquiring dqio_sem ext2: Remove GFP_NOFS use in ext2_xattr_cache_insert() ext2: Drop GFP_NOFS use in ext2_get_blocks() ext2: Drop GFP_NOFS allocation from ext2_init_block_alloc_info() udf: Remove GFP_NOFS allocation in udf_expand_file_adinicb() ...
204 lines
7.3 KiB
C
204 lines
7.3 KiB
C
/* 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);
|
|
|
|
extern bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
|
|
struct mm_struct *mm, unsigned long vm_flags);
|
|
#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
|