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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/smb/client/cached_dir.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/smb/client/cached_dir.h')
-rw-r--r--fs/smb/client/cached_dir.h80
1 files changed, 80 insertions, 0 deletions
diff --git a/fs/smb/client/cached_dir.h b/fs/smb/client/cached_dir.h
new file mode 100644
index 000000000..2f4e764c9
--- /dev/null
+++ b/fs/smb/client/cached_dir.h
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Functions to handle the cached directory entries
+ *
+ * Copyright (c) 2022, Ronnie Sahlberg <lsahlber@redhat.com>
+ */
+
+#ifndef _CACHED_DIR_H
+#define _CACHED_DIR_H
+
+
+struct cached_dirent {
+ struct list_head entry;
+ char *name;
+ int namelen;
+ loff_t pos;
+
+ struct cifs_fattr fattr;
+};
+
+struct cached_dirents {
+ bool is_valid:1;
+ bool is_failed:1;
+ struct dir_context *ctx; /*
+ * Only used to make sure we only take entries
+ * from a single context. Never dereferenced.
+ */
+ struct mutex de_mutex;
+ int pos; /* Expected ctx->pos */
+ struct list_head entries;
+};
+
+struct cached_fid {
+ struct list_head entry;
+ struct cached_fids *cfids;
+ const char *path;
+ bool has_lease:1;
+ bool is_open:1;
+ bool on_list:1;
+ bool file_all_info_is_valid:1;
+ unsigned long time; /* jiffies of when lease was taken */
+ struct kref refcount;
+ struct cifs_fid fid;
+ spinlock_t fid_lock;
+ struct cifs_tcon *tcon;
+ struct dentry *dentry;
+ struct work_struct lease_break;
+ struct smb2_file_all_info file_all_info;
+ struct cached_dirents dirents;
+};
+
+#define MAX_CACHED_FIDS 16
+struct cached_fids {
+ /* Must be held when:
+ * - accessing the cfids->entries list
+ */
+ spinlock_t cfid_list_lock;
+ int num_entries;
+ struct list_head entries;
+};
+
+extern struct cached_fids *init_cached_dirs(void);
+extern void free_cached_dirs(struct cached_fids *cfids);
+extern int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
+ const char *path,
+ struct cifs_sb_info *cifs_sb,
+ bool lookup_only, struct cached_fid **cfid);
+extern int open_cached_dir_by_dentry(struct cifs_tcon *tcon,
+ struct dentry *dentry,
+ struct cached_fid **cfid);
+extern void close_cached_dir(struct cached_fid *cfid);
+extern void drop_cached_dir_by_name(const unsigned int xid,
+ struct cifs_tcon *tcon,
+ const char *name,
+ struct cifs_sb_info *cifs_sb);
+extern void close_all_cached_dirs(struct cifs_sb_info *cifs_sb);
+extern void invalidate_all_cached_dirs(struct cifs_tcon *tcon);
+extern int cached_dir_lease_break(struct cifs_tcon *tcon, __u8 lease_key[16]);
+
+#endif /* _CACHED_DIR_H */