^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) FUSE: Filesystem in Userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) This program can be distributed under the terms of the GNU GPL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) See the file COPYING.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #ifndef _FS_FUSE_I_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define _FS_FUSE_I_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #ifndef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) # define pr_fmt(fmt) "fuse: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/fuse.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/backing-dev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/rwsem.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/rbtree.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/poll.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/kref.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/xattr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/pid_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/refcount.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/user_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /** Default max number of pages that can be used in a single read request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /** Maximum of max_pages received in init_out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define FUSE_MAX_MAX_PAGES 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /** Bias for fi->writectr, meaning new writepages must not be sent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define FUSE_NOWRITE INT_MIN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /** It could be as large as PATH_MAX, but would that have any uses? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define FUSE_NAME_MAX 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /** Number of dentries for each connection in the control filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define FUSE_CTL_NUM_DENTRIES 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /** List of active connections */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) extern struct list_head fuse_conn_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /** Global mutex protecting fuse_conn_list and the control filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern struct mutex fuse_mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /** Module parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) extern unsigned max_user_bgreq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) extern unsigned max_user_congthresh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* One forget request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct fuse_forget_link {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct fuse_forget_one forget_one;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct fuse_forget_link *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /** FUSE inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct fuse_inode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /** Inode data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct inode inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /** Unique ID, which identifies the inode between userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * and kernel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u64 nodeid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /** Number of lookups on this inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) u64 nlookup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) /** The request used for sending the FORGET message */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct fuse_forget_link *forget;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) /** Time in jiffies until the file attributes are valid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) u64 i_time;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* Which attributes are invalid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) u32 inval_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /** The sticky bit in inode->i_mode may have been removed, so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) preserve the original mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) umode_t orig_i_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /** 64 bit inode number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) u64 orig_ino;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /** Version of last attribute change */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) u64 attr_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* Write related fields (regular file only) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* Files usable in writepage. Protected by fi->lock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct list_head write_files;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* Writepages pending on truncate or fsync */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) struct list_head queued_writes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) /* Number of sent writes, a negative bias
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * (FUSE_NOWRITE) means more writes are blocked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int writectr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* Waitq for writepage completion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) wait_queue_head_t page_waitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* List of writepage requestst (pending or sent) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct rb_root writepages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /* readdir cache (directory only) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* true if fully cached */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) bool cached;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) /* size of cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) loff_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) /* position at end of cache (position of next entry) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) loff_t pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* version of the cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) u64 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) /* modification time of directory when cache was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) * started */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct timespec64 mtime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* iversion of directory when cache was started */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) u64 iversion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) /* protects above fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) } rdc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /** Miscellaneous bits describing inode state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) unsigned long state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /** Lock for serializing lookup and readdir for back compatibility*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /** Lock to protect write related fields */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * Can't take inode lock in fault path (leads to circular dependency).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) * Introduce another semaphore which can be taken in fault path and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * then other filesystem paths can take this to block faults.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct rw_semaphore i_mmap_sem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #ifdef CONFIG_FUSE_DAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * Dax specific inode data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct fuse_inode_dax *dax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /** FUSE inode state bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /** Advise readdirplus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) FUSE_I_ADVISE_RDPLUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /** Initialized with readdirplus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) FUSE_I_INIT_RDPLUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) /** An operation changing file size is in progress */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) FUSE_I_SIZE_UNSTABLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* Bad inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) FUSE_I_BAD,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct fuse_conn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct fuse_mount;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) struct fuse_release_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * Reference to lower filesystem file for read/write operations handled in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * passthrough mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * This struct also tracks the credentials to be used for handling read/write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) * operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct fuse_passthrough {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) struct file *filp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) struct cred *cred;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) /** FUSE specific file data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) struct fuse_file {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) /** Fuse connection for this file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) struct fuse_mount *fm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /* Argument space reserved for release */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) struct fuse_release_args *release_args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /** Kernel file handle guaranteed to be unique */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) u64 kh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /** File handle used by userspace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) u64 fh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /** Node id of this file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) u64 nodeid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) /** Refcount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) refcount_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /** FOPEN_* flags returned by open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) u32 open_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) /** Entry on inode's write_files list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct list_head write_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /* Readdir related */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * Protects below fields against (crazy) parallel readdir on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * same open file. Uncontended in the normal case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) /* Dir stream position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) loff_t pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* Offset in cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) loff_t cache_off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* Version of cache we are reading */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) u64 version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) } readdir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) /** Container for data related to the passthrough functionality */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct fuse_passthrough passthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) /** RB node to be linked on fuse_conn->polled_files */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) struct rb_node polled_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) /** Wait queue head for poll */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) wait_queue_head_t poll_wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /** Has flock been performed on this file? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) bool flock:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) /** One input argument of a request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct fuse_in_arg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) unsigned size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) const void *value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) /** One output argument of a request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) struct fuse_arg {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) unsigned size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) void *value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /** FUSE page descriptor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) struct fuse_page_desc {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) unsigned int length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) struct fuse_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) uint64_t nodeid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) uint32_t opcode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) unsigned short in_numargs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned short out_numargs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) bool force:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) bool noreply:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) bool nocreds:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) bool in_pages:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) bool out_pages:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) bool user_pages:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) bool out_argvar:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) bool page_zeroing:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) bool page_replace:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) bool may_block:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) struct fuse_in_arg in_args[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) struct fuse_arg out_args[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /* Path used for completing d_canonical_path */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) struct path *canonical_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) struct fuse_args_pages {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) struct fuse_args args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) struct page **pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) struct fuse_page_desc *descs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) unsigned int num_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) #define FUSE_ARGS(args) struct fuse_args args = {}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /** The request IO state (for asynchronous processing) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) struct fuse_io_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) struct kref refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) int async;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) unsigned reqs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) ssize_t bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) size_t size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) __u64 offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) bool write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) bool should_dirty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) struct kiocb *iocb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) struct completion *done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) bool blocking;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) #define FUSE_IO_PRIV_SYNC(i) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) .refcnt = KREF_INIT(1), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) .async = 0, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) .iocb = i, \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) * Request flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) * FR_ISREPLY: set if the request has reply
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) * FR_FORCE: force sending of the request even if interrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * FR_BACKGROUND: request is sent in the background
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * FR_WAITING: request is counted as "waiting"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * FR_ABORTED: the request was aborted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * FR_INTERRUPTED: the request has been interrupted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * FR_LOCKED: data is being copied to/from the request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * FR_PENDING: request is not yet in userspace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * FR_SENT: request is in userspace, waiting for an answer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * FR_FINISHED: request is finished
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * FR_PRIVATE: request is on private list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) * FR_ASYNC: request is asynchronous
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) enum fuse_req_flag {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) FR_ISREPLY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) FR_FORCE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) FR_BACKGROUND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) FR_WAITING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) FR_ABORTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) FR_INTERRUPTED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) FR_LOCKED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) FR_PENDING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) FR_SENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) FR_FINISHED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) FR_PRIVATE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) FR_ASYNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * A request to the client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * .waitq.lock protects the following fields:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * - FR_ABORTED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * - FR_LOCKED (may also be modified under fc->lock, tested under both)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) struct fuse_req {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) /** This can be on either pending processing or io lists in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) fuse_conn */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) struct list_head list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /** Entry on the interrupts list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) struct list_head intr_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /* Input/output arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) struct fuse_args *args;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) /** refcount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) refcount_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /* Request flags, updated with test/set/clear_bit() */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) /* The request input header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) struct fuse_in_header h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) } in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /* The request output header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) struct fuse_out_header h;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) } out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) /** Used to wake up the task waiting for completion of request*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) wait_queue_head_t waitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /** virtio-fs's physically contiguous buffer for in and out args */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) void *argbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) /** fuse_mount this request belongs to */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) struct fuse_mount *fm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) struct fuse_iqueue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) * Input queue callbacks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * Input queue signalling is device-specific. For example, the /dev/fuse file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) * uses fiq->waitq and fasync to wake processes that are waiting on queue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) * readiness. These callbacks allow other device types to respond to input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) * queue activity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct fuse_iqueue_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) * Signal that a forget has been queued
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) void (*wake_forget_and_unlock)(struct fuse_iqueue *fiq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) __releases(fiq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) * Signal that an INTERRUPT request has been queued
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) void (*wake_interrupt_and_unlock)(struct fuse_iqueue *fiq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) __releases(fiq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * Signal that a request has been queued
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) void (*wake_pending_and_unlock)(struct fuse_iqueue *fiq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) __releases(fiq->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * Clean up when fuse_iqueue is destroyed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) void (*release)(struct fuse_iqueue *fiq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) /** /dev/fuse input queue operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) extern const struct fuse_iqueue_ops fuse_dev_fiq_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) struct fuse_iqueue {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) /** Connection established */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) unsigned connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) /** Lock protecting accesses to members of this structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) /** Readers of the connection are waiting on this */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) wait_queue_head_t waitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) /** The next unique request id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) u64 reqctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /** The list of pending requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) struct list_head pending;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /** Pending interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) struct list_head interrupts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) /** Queue of pending forgets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) struct fuse_forget_link forget_list_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) struct fuse_forget_link *forget_list_tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) /** Batching of FORGET requests (positive indicates FORGET batch) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) int forget_batch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) /** O_ASYNC requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) struct fasync_struct *fasync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) /** Device-specific callbacks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) const struct fuse_iqueue_ops *ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) /** Device-specific state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) void *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) #define FUSE_PQ_HASH_BITS 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) #define FUSE_PQ_HASH_SIZE (1 << FUSE_PQ_HASH_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct fuse_pqueue {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) /** Connection established */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) unsigned connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) /** Lock protecting accessess to members of this structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) /** Hash table of requests being processed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) struct list_head *processing;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) /** The list of requests under I/O */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) struct list_head io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * Fuse device instance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) struct fuse_dev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) /** Fuse connection for this device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct fuse_conn *fc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) /** Processing queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) struct fuse_pqueue pq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) /** list entry on fc->devices */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) struct list_head entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) struct fuse_fs_context {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) unsigned int rootmode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) kuid_t user_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) kgid_t group_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) bool is_bdev:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) bool fd_present:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) bool rootmode_present:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) bool user_id_present:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) bool group_id_present:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) bool default_permissions:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) bool allow_other:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) bool destroy:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) bool no_control:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) bool no_force_umount:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) bool legacy_opts_show:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) bool dax:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) unsigned int max_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) unsigned int blksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) const char *subtype;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) /* DAX device, may be NULL */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) struct dax_device *dax_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) /* fuse_dev pointer to fill in, should contain NULL on entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) void **fudptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * A Fuse connection.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * This structure is created, when the root filesystem is mounted, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) * is destroyed, when the client device is closed and the last
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) * fuse_mount is destroyed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) struct fuse_conn {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) /** Lock protecting accessess to members of this structure */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /** Refcount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) refcount_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) /** Number of fuse_dev's */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) atomic_t dev_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) struct rcu_head rcu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) /** The user id for this mount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) kuid_t user_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /** The group id for this mount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) kgid_t group_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /** The pid namespace for this mount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) struct pid_namespace *pid_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /** The user namespace for this mount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct user_namespace *user_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) /** Maximum read size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) unsigned max_read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) /** Maximum write size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) unsigned max_write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) /** Maxmum number of pages that can be used in a single request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) unsigned int max_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) /** Input queue */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct fuse_iqueue iq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) /** The next unique kernel file handle */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) atomic64_t khctr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) /** rbtree of fuse_files waiting for poll events indexed by ph */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) struct rb_root polled_files;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) /** Maximum number of outstanding background requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) unsigned max_background;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) /** Number of background requests at which congestion starts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) unsigned congestion_threshold;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) /** Number of requests currently in the background */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) unsigned num_background;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) /** Number of background requests currently queued for userspace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) unsigned active_background;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) /** The list of background requests set aside for later queuing */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) struct list_head bg_queue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /** Protects: max_background, congestion_threshold, num_background,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * active_background, bg_queue, blocked */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) spinlock_t bg_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) /** Flag indicating that INIT reply has been received. Allocating
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) * any fuse request will be suspended until the flag is set */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) int initialized;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) /** Flag indicating if connection is blocked. This will be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) the case before the INIT reply is received, and if there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) are too many outstading backgrounds requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) int blocked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) /** waitq for blocked connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) wait_queue_head_t blocked_waitq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) /** Connection established, cleared on umount, connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) abort and device release */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) unsigned connected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /** Connection aborted via sysfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) bool aborted;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) /** Connection failed (version mismatch). Cannot race with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) setting other bitfields since it is only set once in INIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) reply, before any other request, and never cleared */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) unsigned conn_error:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /** Connection successful. Only set in INIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) unsigned conn_init:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) /** Do readpages asynchronously? Only set in INIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) unsigned async_read:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) /** Return an unique read error after abort. Only set in INIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) unsigned abort_err:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) /** Do not send separate SETATTR request before open(O_TRUNC) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) unsigned atomic_o_trunc:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) /** Filesystem supports NFS exporting. Only set in INIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) unsigned export_support:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) /** write-back cache policy (default is write-through) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) unsigned writeback_cache:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) /** allow parallel lookups and readdir (default is serialized) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) unsigned parallel_dirops:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) /** handle fs handles killing suid/sgid/cap on write/chown/trunc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) unsigned handle_killpriv:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) /** cache READLINK responses in page cache */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) unsigned cache_symlinks:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) /* show legacy mount options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) unsigned int legacy_opts_show:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) * The following bitfields are only for optimization purposes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * and hence races in setting them will not cause malfunction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) /** Is open/release not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) unsigned no_open:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) /** Is opendir/releasedir not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) unsigned no_opendir:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) /** Is fsync not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) unsigned no_fsync:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) /** Is fsyncdir not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) unsigned no_fsyncdir:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) /** Is flush not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) unsigned no_flush:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) /** Is setxattr not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) unsigned no_setxattr:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) /** Is getxattr not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) unsigned no_getxattr:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) /** Is listxattr not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) unsigned no_listxattr:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) /** Is removexattr not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) unsigned no_removexattr:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) /** Are posix file locking primitives not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) unsigned no_lock:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) /** Is access not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) unsigned no_access:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) /** Is create not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) unsigned no_create:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) /** Is interrupt not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) unsigned no_interrupt:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) /** Is bmap not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) unsigned no_bmap:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) /** Is poll not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) unsigned no_poll:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) /** Do multi-page cached writes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) unsigned big_writes:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) /** Don't apply umask to creation modes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) unsigned dont_mask:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) /** Are BSD file locking primitives not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) unsigned no_flock:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) /** Is fallocate not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) unsigned no_fallocate:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) /** Is rename with flags implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) unsigned no_rename2:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) /** Use enhanced/automatic page cache invalidation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) unsigned auto_inval_data:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) /** Filesystem is fully reponsible for page cache invalidation. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) unsigned explicit_inval_data:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) /** Does the filesystem support readdirplus? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) unsigned do_readdirplus:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) /** Does the filesystem want adaptive readdirplus? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) unsigned readdirplus_auto:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) /** Does the filesystem support asynchronous direct-IO submission? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) unsigned async_dio:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) /** Is lseek not implemented by fs? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) unsigned no_lseek:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) /** Does the filesystem support posix acls? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) unsigned posix_acl:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) /** Check permissions based on the file mode or not? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) unsigned default_permissions:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) /** Allow other than the mounter user to access the filesystem ? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) unsigned allow_other:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) /** Does the filesystem support copy_file_range? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) unsigned no_copy_file_range:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) /* Send DESTROY request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) unsigned int destroy:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) /* Delete dentries that have gone stale */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) unsigned int delete_stale:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) /** Do not create entry in fusectl fs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) unsigned int no_control:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) /** Do not allow MNT_FORCE umount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) unsigned int no_force_umount:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) /* Auto-mount submounts announced by the server */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) unsigned int auto_submounts:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) /** Passthrough mode for read/write IO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) unsigned int passthrough:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) /** The number of requests waiting for completion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) atomic_t num_waiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) /** Negotiated minor version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) unsigned minor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) /** Entry on the fuse_mount_list */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) struct list_head entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) /** Device ID from the root super block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) dev_t dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /** Dentries in the control filesystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) /** number of dentries used in the above array */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) int ctl_ndents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) /** Key for lock owner ID scrambling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) u32 scramble_key[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) /** Version counter for attribute changes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) atomic64_t attr_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) /** Called on final put */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) void (*release)(struct fuse_conn *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) * Read/write semaphore to hold when accessing the sb of any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) * fuse_mount belonging to this connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) struct rw_semaphore killsb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) /** List of device instances belonging to this connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) struct list_head devices;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) #ifdef CONFIG_FUSE_DAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) /* Dax specific conn data, non-NULL if DAX is enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) struct fuse_conn_dax *dax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) /** List of filesystems using this connection */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) struct list_head mounts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) /** IDR for passthrough requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) struct idr passthrough_req;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) /** Protects passthrough_req */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) spinlock_t passthrough_req_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) * Represents a mounted filesystem, potentially a submount.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) * This object allows sharing a fuse_conn between separate mounts to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) * allow submounts with dedicated superblocks and thus separate device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * IDs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) struct fuse_mount {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) /* Underlying (potentially shared) connection to the FUSE server */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) struct fuse_conn *fc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) /* Refcount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) refcount_t count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * Super block for this connection (fc->killsb must be held when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) * accessing this).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) struct super_block *sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) /* Entry on fc->mounts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) struct list_head fc_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) static inline struct fuse_mount *get_fuse_mount_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) return sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) struct fuse_mount *fm = get_fuse_mount_super(sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) return fm ? fm->fc : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) static inline struct fuse_mount *get_fuse_mount(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) return get_fuse_mount_super(inode->i_sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) static inline struct fuse_conn *get_fuse_conn(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) struct fuse_mount *fm = get_fuse_mount(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) return fm ? fm->fc : NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) static inline struct fuse_inode *get_fuse_inode(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) return container_of(inode, struct fuse_inode, inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) static inline u64 get_node_id(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) return get_fuse_inode(inode)->nodeid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) static inline int invalid_nodeid(u64 nodeid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) return !nodeid || nodeid == FUSE_ROOT_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) static inline u64 fuse_get_attr_version(struct fuse_conn *fc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) return atomic64_read(&fc->attr_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) static inline bool fuse_stale_inode(const struct inode *inode, int generation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) struct fuse_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) return inode->i_generation != generation ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) inode_wrong_type(inode, attr->mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) static inline void fuse_make_bad(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) remove_inode_hash(inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) static inline bool fuse_is_bad(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) /** Device operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) extern const struct file_operations fuse_dev_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) extern const struct dentry_operations fuse_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) extern const struct dentry_operations fuse_root_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) * Get a filled in inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) int generation, struct fuse_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) u64 attr_valid, u64 attr_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) struct fuse_entry_out *outarg, struct inode **inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * Send FORGET command
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) u64 nodeid, u64 nlookup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) struct fuse_forget_link *fuse_alloc_forget(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) unsigned int max,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) unsigned int *countp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * Initialize READ or READDIR request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) struct fuse_io_args {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct fuse_read_in in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) u64 attr_ver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) } read;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) struct fuse_write_in in;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) struct fuse_write_out out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) bool page_locked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) } write;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) struct fuse_args_pages ap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) struct fuse_io_priv *io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) struct fuse_file *ff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) void fuse_read_args_fill(struct fuse_io_args *ia, struct file *file, loff_t pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) size_t count, int opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) * Send OPEN or OPENDIR request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) struct fuse_file *fuse_file_alloc(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) void fuse_file_free(struct fuse_file *ff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) void fuse_finish_open(struct inode *inode, struct file *file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) void fuse_sync_release(struct fuse_inode *fi, struct fuse_file *ff, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) * Send RELEASE or RELEASEDIR request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) void fuse_release_common(struct file *file, bool isdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) * Send FSYNC or FSYNCDIR request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) int datasync, int opcode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) * Notify poll wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) int fuse_notify_poll_wakeup(struct fuse_conn *fc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) struct fuse_notify_poll_wakeup_out *outarg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) * Initialize file operations on a regular file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) void fuse_init_file_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) * Initialize inode operations on regular files and special files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) void fuse_init_common(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) * Initialize inode and file operations on a directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) void fuse_init_dir(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) * Initialize inode operations on a symlink
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) void fuse_init_symlink(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) * Change attributes of an inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) u64 attr_valid, u64 attr_version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) u64 attr_valid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * Initialize the client device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) int fuse_dev_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) * Cleanup the client device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) void fuse_dev_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) int fuse_ctl_init(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) void __exit fuse_ctl_cleanup(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * Simple request sending that does request allocation and freeing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) ssize_t fuse_simple_request(struct fuse_mount *fm, struct fuse_args *args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) int fuse_simple_background(struct fuse_mount *fm, struct fuse_args *args,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) gfp_t gfp_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) * End a finished request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) void fuse_request_end(struct fuse_req *req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) /* Abort all requests */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) void fuse_abort_conn(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) void fuse_wait_aborted(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) * Invalidate inode attributes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) void fuse_invalidate_attr(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) void fuse_invalidate_entry_cache(struct dentry *entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) void fuse_invalidate_atime(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) u64 entry_attr_timeout(struct fuse_entry_out *o);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) * Acquire reference to fuse_conn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) * Initialize fuse_conn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) struct user_namespace *user_ns,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) * Release reference to fuse_conn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) void fuse_conn_put(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) * Acquire reference to fuse_mount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076) struct fuse_mount *fuse_mount_get(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) * Release reference to fuse_mount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) void fuse_mount_put(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) struct fuse_dev *fuse_dev_alloc(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) void fuse_dev_free(struct fuse_dev *fud);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) void fuse_send_init(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) * Fill in superblock and initialize fuse connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) * @sb: partially-initialized superblock to fill in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) * @ctx: mount context
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) * Fill in superblock for submounts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) * @sb: partially-initialized superblock to fill in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) * @parent_fi: The fuse_inode of the parent filesystem where this submount is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100) * mounted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) int fuse_fill_super_submount(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) struct fuse_inode *parent_fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) * Remove the mount from the connection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108) * Returns whether this was the last mount
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) bool fuse_mount_remove(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) * Shut down the connection (possibly sending DESTROY request).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) void fuse_conn_destroy(struct fuse_mount *fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) * Add connection to control filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) int fuse_ctl_add_conn(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) * Remove connection from control filesystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) void fuse_ctl_remove_conn(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) * Is file type valid?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) int fuse_valid_type(int m);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) bool fuse_invalid_attr(struct fuse_attr *attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) * Is current process allowed to perform filesystem operation?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) int fuse_allow_current_process(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) void fuse_flush_time_update(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) void fuse_update_ctime(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) int fuse_update_attributes(struct inode *inode, struct file *file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) void fuse_flush_writepages(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) void fuse_set_nowrite(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) void fuse_release_nowrite(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) * Scan all fuse_mounts belonging to fc to find the first where
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) * ilookup5() returns a result. Return that result and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) * respective fuse_mount in *fm (unless fm is NULL).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) * The caller must hold fc->killsb.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) struct fuse_mount **fm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) * File-system tells the kernel to invalidate cache for the given node id.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) loff_t offset, loff_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) * File-system tells the kernel to invalidate parent attributes and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) * the dentry matching parent/name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) * If the child_nodeid is non-zero and:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) * - matches the inode number for the dentry matching parent/name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) * - is not a mount point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) * - is a file or oan empty directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) * then the dentry is unhashed (d_delete()).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) u64 child_nodeid, struct qstr *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) bool isdir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) * fuse_direct_io() flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) /** If set, it is WRITE; otherwise - READ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) #define FUSE_DIO_WRITE (1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) /** CUSE pass fuse_direct_io() a file which f_mapping->host is not from FUSE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) #define FUSE_DIO_CUSE (1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) loff_t *ppos, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) unsigned int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) long fuse_ioctl_common(struct file *file, unsigned int cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) unsigned long arg, unsigned int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) __poll_t fuse_file_poll(struct file *file, poll_table *wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) int fuse_dev_release(struct inode *inode, struct file *file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) bool fuse_write_update_size(struct inode *inode, loff_t pos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) int fuse_flush_times(struct inode *inode, struct fuse_file *ff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) int fuse_write_inode(struct inode *inode, struct writeback_control *wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) struct file *file);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) void fuse_set_initialized(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) void fuse_unlock_inode(struct inode *inode, bool locked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) bool fuse_lock_inode(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) int fuse_setxattr(struct inode *inode, const char *name, const void *value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) size_t size, int flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) int fuse_removexattr(struct inode *inode, const char *name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) extern const struct xattr_handler *fuse_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) extern const struct xattr_handler *fuse_acl_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) extern const struct xattr_handler *fuse_no_acl_xattr_handlers[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) struct posix_acl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) struct posix_acl *fuse_get_acl(struct inode *inode, int type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) /* readdir.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) int fuse_readdir(struct file *file, struct dir_context *ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) * Return the number of bytes in an arguments list
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) * Get the next unique ID for a request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) u64 fuse_get_unique(struct fuse_iqueue *fiq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) void fuse_free_conn(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) /* dax.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) #define FUSE_IS_DAX(inode) (IS_ENABLED(CONFIG_FUSE_DAX) && IS_DAX(inode))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) int fuse_dax_mmap(struct file *file, struct vm_area_struct *vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) int fuse_dax_break_layouts(struct inode *inode, u64 dmap_start, u64 dmap_end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) int fuse_dax_conn_alloc(struct fuse_conn *fc, struct dax_device *dax_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) void fuse_dax_conn_free(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) void fuse_dax_inode_init(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) void fuse_dax_inode_cleanup(struct inode *inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) void fuse_dax_cancel_work(struct fuse_conn *fc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) /* passthrough.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) int fuse_passthrough_open(struct fuse_dev *fud, u32 lower_fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) int fuse_passthrough_setup(struct fuse_conn *fc, struct fuse_file *ff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) struct fuse_open_out *openarg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) void fuse_passthrough_release(struct fuse_passthrough *passthrough);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) ssize_t fuse_passthrough_read_iter(struct kiocb *iocb, struct iov_iter *to);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) ssize_t fuse_passthrough_write_iter(struct kiocb *iocb, struct iov_iter *from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) ssize_t fuse_passthrough_mmap(struct file *file, struct vm_area_struct *vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) #endif /* _FS_FUSE_I_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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