projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 05b98fd2 RS |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* | |
| 3 | * Functions to handle the cached directory entries | |
| 4 | * | |
| 5 | * Copyright (c) 2022, Ronnie Sahlberg <lsahlber@redhat.com> | |
| 6 | */ | |
| 7 | ||
| 8 | #ifndef _CACHED_DIR_H | |
| 9 | #define _CACHED_DIR_H | |
| 10 | ||
| 11 | ||
| a63ec83c RS |
12 | struct cached_dirent { |
| 13 | struct list_head entry; | |
| 14 | char *name; | |
| 15 | int namelen; | |
| 16 | loff_t pos; | |
| 17 | ||
| 18 | struct cifs_fattr fattr; | |
| 19 | }; | |
| 20 | ||
| 21 | struct cached_dirents { | |
| 22 | bool is_valid:1; | |
| 23 | bool is_failed:1; | |
| 24 | struct dir_context *ctx; /* | |
| 25 | * Only used to make sure we only take entries | |
| 26 | * from a single context. Never dereferenced. | |
| 27 | */ | |
| 28 | struct mutex de_mutex; | |
| 29 | int pos; /* Expected ctx->pos */ | |
| 30 | struct list_head entries; | |
| 31 | }; | |
| 32 | ||
| 33 | struct cached_fid { | |
| ebe98f14 RS |
34 | struct list_head entry; |
| 35 | struct cached_fids *cfids; | |
| 30f8f371 | 36 | const char *path; |
| a63ec83c | 37 | bool has_lease:1; |
| ebe98f14 RS |
38 | bool is_open:1; |
| 39 | bool on_list:1; | |
| 40 | bool file_all_info_is_valid:1; | |
| a63ec83c RS |
41 | unsigned long time; /* jiffies of when lease was taken */ |
| 42 | struct kref refcount; | |
| 43 | struct cifs_fid fid; | |
| ebe98f14 | 44 | spinlock_t fid_lock; |
| a63ec83c RS |
45 | struct cifs_tcon *tcon; |
| 46 | struct dentry *dentry; | |
| 47 | struct work_struct lease_break; | |
| 48 | struct smb2_file_all_info file_all_info; | |
| 49 | struct cached_dirents dirents; | |
| 50 | }; | |
| 51 | ||
| ebe98f14 | 52 | #define MAX_CACHED_FIDS 16 |
| aea6794e | 53 | struct cached_fids { |
| ebe98f14 RS |
54 | /* Must be held when: |
| 55 | * - accessing the cfids->entries list | |
| 56 | */ | |
| 57 | spinlock_t cfid_list_lock; | |
| 58 | int num_entries; | |
| 59 | struct list_head entries; | |
| aea6794e RS |
60 | }; |
| 61 | ||
| 62 | extern struct cached_fids *init_cached_dirs(void); | |
| 63 | extern void free_cached_dirs(struct cached_fids *cfids); | |
| 05b98fd2 RS |
64 | extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon, |
| 65 | const char *path, | |
| 66 | struct cifs_sb_info *cifs_sb, | |
| 7eb59a98 | 67 | bool lookup_only, struct cached_fid **cfid); |
| 05b98fd2 RS |
68 | extern int open_cached_dir_by_dentry(struct cifs_tcon *tcon, |
| 69 | struct dentry *dentry, | |
| 70 | struct cached_fid **cfid); | |
| 71 | extern void close_cached_dir(struct cached_fid *cfid); | |
| 05b98fd2 RS |
72 | extern void close_all_cached_dirs(struct cifs_sb_info *cifs_sb); |
| 73 | extern void invalidate_all_cached_dirs(struct cifs_tcon *tcon); | |
| 74 | extern int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16]); | |
| 75 | ||
| 76 | #endif /* _CACHED_DIR_H */ |