d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 1) /*
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 2) FUSE: Filesystem in Userspace
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 3) Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 4)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 5) This program can be distributed under the terms of the GNU GPL.
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 6) See the file COPYING.
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 7) */
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 8)
29d434b39c807 (Tejun Heo 2008-10-16 16:08:57 +0200 9) #ifndef _FS_FUSE_I_H
29d434b39c807 (Tejun Heo 2008-10-16 16:08:57 +0200 10) #define _FS_FUSE_I_H
29d434b39c807 (Tejun Heo 2008-10-16 16:08:57 +0200 11)
f2294482ff65d (Kirill Smelkov 2019-03-27 09:15:17 +0000 12) #ifndef pr_fmt
f2294482ff65d (Kirill Smelkov 2019-03-27 09:15:17 +0000 13) # define pr_fmt(fmt) "fuse: " fmt
f2294482ff65d (Kirill Smelkov 2019-03-27 09:15:17 +0000 14) #endif
f2294482ff65d (Kirill Smelkov 2019-03-27 09:15:17 +0000 15)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 16) #include <linux/fuse.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 17) #include <linux/fs.h>
51eb01e73599e (Miklos Szeredi 2006-06-25 05:48:50 -0700 18) #include <linux/mount.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 19) #include <linux/wait.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 20) #include <linux/list.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 21) #include <linux/spinlock.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 22) #include <linux/mm.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 23) #include <linux/backing-dev.h>
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 24) #include <linux/mutex.h>
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 25) #include <linux/rwsem.h>
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 26) #include <linux/rbtree.h>
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 27) #include <linux/poll.h>
5a18ec176c934 (Miklos Szeredi 2011-02-25 14:44:58 +0100 28) #include <linux/workqueue.h>
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 29) #include <linux/kref.h>
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 30) #include <linux/xattr.h>
0b6e9ea041e6c (Seth Forshee 2014-07-02 16:29:19 -0500 31) #include <linux/pid_namespace.h>
4e8c2eb54327a (Elena Reshetova 2017-03-03 11:04:03 +0200 32) #include <linux/refcount.h>
8cb08329b0809 (Eric W. Biederman 2018-02-21 11:18:07 -0600 33) #include <linux/user_namespace.h>
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 34)
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 35) /** Default max number of pages that can be used in a single read request */
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 36) #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 37)
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 38) /** Maximum of max_pages received in init_out */
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 39) #define FUSE_MAX_MAX_PAGES 256
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 40)
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 41) /** Bias for fi->writectr, meaning new writepages must not be sent */
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 42) #define FUSE_NOWRITE INT_MIN
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 43)
1d3d752b471d2 (Miklos Szeredi 2006-01-06 00:19:40 -0800 44) /** It could be as large as PATH_MAX, but would that have any uses? */
1d3d752b471d2 (Miklos Szeredi 2006-01-06 00:19:40 -0800 45) #define FUSE_NAME_MAX 1024
1d3d752b471d2 (Miklos Szeredi 2006-01-06 00:19:40 -0800 46)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 47) /** Number of dentries for each connection in the control filesystem */
79a9d99434b10 (Csaba Henk 2009-08-26 19:18:24 +0200 48) #define FUSE_CTL_NUM_DENTRIES 5
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 49)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 50) /** List of active connections */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 51) extern struct list_head fuse_conn_list;
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 52)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 53) /** Global mutex protecting fuse_conn_list and the control filesystem */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 54) extern struct mutex fuse_mutex;
413ef8cb30251 (Miklos Szeredi 2005-09-09 13:10:35 -0700 55)
79a9d99434b10 (Csaba Henk 2009-08-26 19:18:24 +0200 56) /** Module parameters */
79a9d99434b10 (Csaba Henk 2009-08-26 19:18:24 +0200 57) extern unsigned max_user_bgreq;
79a9d99434b10 (Csaba Henk 2009-08-26 19:18:24 +0200 58) extern unsigned max_user_congthresh;
79a9d99434b10 (Csaba Henk 2009-08-26 19:18:24 +0200 59)
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 60) /* One forget request */
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 61) struct fuse_forget_link {
02c048b919455 (Miklos Szeredi 2010-12-07 20:16:56 +0100 62) struct fuse_forget_one forget_one;
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 63) struct fuse_forget_link *next;
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 64) };
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 65)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 66) /** FUSE inode */
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 67) struct fuse_inode {
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 68) /** Inode data */
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 69) struct inode inode;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 70)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 71) /** Unique ID, which identifies the inode between userspace
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 72) * and kernel */
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 73) u64 nodeid;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 74)
9e6268db496a2 (Miklos Szeredi 2005-09-09 13:10:29 -0700 75) /** Number of lookups on this inode */
9e6268db496a2 (Miklos Szeredi 2005-09-09 13:10:29 -0700 76) u64 nlookup;
9e6268db496a2 (Miklos Szeredi 2005-09-09 13:10:29 -0700 77)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 78) /** The request used for sending the FORGET message */
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 79) struct fuse_forget_link *forget;
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 80)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 81) /** Time in jiffies until the file attributes are valid */
0a0898cf41387 (Miklos Szeredi 2006-07-30 03:04:10 -0700 82) u64 i_time;
ebc14c4dbeb56 (Miklos Szeredi 2007-10-16 23:31:03 -0700 83)
2f1e81965fd0f (Miklos Szeredi 2018-10-15 15:43:06 +0200 84) /* Which attributes are invalid */
2f1e81965fd0f (Miklos Szeredi 2018-10-15 15:43:06 +0200 85) u32 inval_mask;
2f1e81965fd0f (Miklos Szeredi 2018-10-15 15:43:06 +0200 86)
ebc14c4dbeb56 (Miklos Szeredi 2007-10-16 23:31:03 -0700 87) /** The sticky bit in inode->i_mode may have been removed, so
ebc14c4dbeb56 (Miklos Szeredi 2007-10-16 23:31:03 -0700 88) preserve the original mode */
541af6a074743 (Al Viro 2011-07-26 03:17:33 -0400 89) umode_t orig_i_mode;
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 90)
45c72cd73c788 (Pavel Shilovsky 2012-05-10 19:49:38 +0400 91) /** 64 bit inode number */
45c72cd73c788 (Pavel Shilovsky 2012-05-10 19:49:38 +0400 92) u64 orig_ino;
45c72cd73c788 (Pavel Shilovsky 2012-05-10 19:49:38 +0400 93)
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 94) /** Version of last attribute change */
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 95) u64 attr_version;
93a8c3cd9e983 (Miklos Szeredi 2007-10-18 03:07:03 -0700 96)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 97) union {
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 98) /* Write related fields (regular file only) */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 99) struct {
f15ecfef058d9 (Kirill Tkhai 2018-11-09 13:33:22 +0300 100) /* Files usable in writepage. Protected by fi->lock */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 101) struct list_head write_files;
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 102)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 103) /* Writepages pending on truncate or fsync */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 104) struct list_head queued_writes;
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 105)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 106) /* Number of sent writes, a negative bias
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 107) * (FUSE_NOWRITE) means more writes are blocked */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 108) int writectr;
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 109)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 110) /* Waitq for writepage completion */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 111) wait_queue_head_t page_waitq;
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 112)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 113) /* List of writepage requestst (pending or sent) */
6b2fb79963fbe (Maxim Patlasov 2019-09-19 17:11:20 +0300 114) struct rb_root writepages;
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 115) };
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 116)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 117) /* readdir cache (directory only) */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 118) struct {
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 119) /* true if fully cached */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 120) bool cached;
69e34551152a2 (Miklos Szeredi 2018-10-01 10:07:04 +0200 121)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 122) /* size of cache */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 123) loff_t size;
69e34551152a2 (Miklos Szeredi 2018-10-01 10:07:04 +0200 124)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 125) /* position at end of cache (position of next entry) */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 126) loff_t pos;
69e34551152a2 (Miklos Szeredi 2018-10-01 10:07:04 +0200 127)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 128) /* version of the cache */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 129) u64 version;
3494927e090bf (Miklos Szeredi 2018-10-01 10:07:04 +0200 130)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 131) /* modification time of directory when cache was
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 132) * started */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 133) struct timespec64 mtime;
7118883b44b8e (Miklos Szeredi 2018-10-01 10:07:04 +0200 134)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 135) /* iversion of directory when cache was started */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 136) u64 iversion;
261aaba72fdba (Miklos Szeredi 2018-10-01 10:07:05 +0200 137)
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 138) /* protects above fields */
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 139) spinlock_t lock;
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 140) } rdc;
ab2257e9941b9 (Miklos Szeredi 2018-10-01 10:07:05 +0200 141) };
69e34551152a2 (Miklos Szeredi 2018-10-01 10:07:04 +0200 142)
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 143) /** Miscellaneous bits describing inode state */
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 144) unsigned long state;
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 145)
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 146) /** Lock for serializing lookup and readdir for back compatibility*/
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 147) struct mutex mutex;
f15ecfef058d9 (Kirill Tkhai 2018-11-09 13:33:22 +0300 148)
f15ecfef058d9 (Kirill Tkhai 2018-11-09 13:33:22 +0300 149) /** Lock to protect write related fields */
f15ecfef058d9 (Kirill Tkhai 2018-11-09 13:33:22 +0300 150) spinlock_t lock;
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 151)
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 152) /**
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 153) * Can't take inode lock in fault path (leads to circular dependency).
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 154) * Introduce another semaphore which can be taken in fault path and
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 155) * then other filesystem paths can take this to block faults.
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 156) */
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 157) struct rw_semaphore i_mmap_sem;
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 158)
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 159) #ifdef CONFIG_FUSE_DAX
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 160) /*
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 161) * Dax specific inode data
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 162) */
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 163) struct fuse_inode_dax *dax;
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 164) #endif
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 165) };
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 166)
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 167) /** FUSE inode state bits */
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 168) enum {
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 169) /** Advise readdirplus */
4582a4ab2a0e7 (Feng Shuo 2013-01-15 11:23:28 +0800 170) FUSE_I_ADVISE_RDPLUS,
6314efee3cfee (Miklos Szeredi 2013-10-01 16:41:22 +0200 171) /** Initialized with readdirplus */
6314efee3cfee (Miklos Szeredi 2013-10-01 16:41:22 +0200 172) FUSE_I_INIT_RDPLUS,
06a7c3c278140 (Maxim Patlasov 2013-08-30 17:06:04 +0400 173) /** An operation changing file size is in progress */
06a7c3c278140 (Maxim Patlasov 2013-08-30 17:06:04 +0400 174) FUSE_I_SIZE_UNSTABLE,
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 175) /* Bad inode */
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 176) FUSE_I_BAD,
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 177) };
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 178)
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 179) struct fuse_conn;
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 180) struct fuse_mount;
4cb548666e4c1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 181) struct fuse_release_args;
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 182)
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 183) /** FUSE specific file data */
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 184) struct fuse_file {
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 185) /** Fuse connection for this file */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 186) struct fuse_mount *fm;
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 187)
4cb548666e4c1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 188) /* Argument space reserved for release */
4cb548666e4c1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 189) struct fuse_release_args *release_args;
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 190)
acf99433d98c2 (Tejun Heo 2008-11-26 12:03:55 +0100 191) /** Kernel file handle guaranteed to be unique */
acf99433d98c2 (Tejun Heo 2008-11-26 12:03:55 +0100 192) u64 kh;
acf99433d98c2 (Tejun Heo 2008-11-26 12:03:55 +0100 193)
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 194) /** File handle used by userspace */
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 195) u64 fh;
c756e0a4d7920 (Miklos Szeredi 2007-10-16 23:31:00 -0700 196)
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 197) /** Node id of this file */
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 198) u64 nodeid;
da5e4714578ff (Miklos Szeredi 2009-04-28 16:56:36 +0200 199)
c756e0a4d7920 (Miklos Szeredi 2007-10-16 23:31:00 -0700 200) /** Refcount */
4e8c2eb54327a (Elena Reshetova 2017-03-03 11:04:03 +0200 201) refcount_t count;
93a8c3cd9e983 (Miklos Szeredi 2007-10-18 03:07:03 -0700 202)
c7b7143c6342b (Miklos Szeredi 2009-04-28 16:56:37 +0200 203) /** FOPEN_* flags returned by open */
c7b7143c6342b (Miklos Szeredi 2009-04-28 16:56:37 +0200 204) u32 open_flags;
c7b7143c6342b (Miklos Szeredi 2009-04-28 16:56:37 +0200 205)
93a8c3cd9e983 (Miklos Szeredi 2007-10-18 03:07:03 -0700 206) /** Entry on inode's write_files list */
93a8c3cd9e983 (Miklos Szeredi 2007-10-18 03:07:03 -0700 207) struct list_head write_entry;
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 208)
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 209) /* Readdir related */
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 210) struct {
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 211) /*
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 212) * Protects below fields against (crazy) parallel readdir on
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 213) * same open file. Uncontended in the normal case.
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 214) */
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 215) struct mutex lock;
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 216)
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 217) /* Dir stream position */
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 218) loff_t pos;
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 219)
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 220) /* Offset in cache */
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 221) loff_t cache_off;
3494927e090bf (Miklos Szeredi 2018-10-01 10:07:04 +0200 222)
3494927e090bf (Miklos Szeredi 2018-10-01 10:07:04 +0200 223) /* Version of cache we are reading */
3494927e090bf (Miklos Szeredi 2018-10-01 10:07:04 +0200 224) u64 version;
3494927e090bf (Miklos Szeredi 2018-10-01 10:07:04 +0200 225)
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 226) } readdir;
5d7bc7e8680c7 (Miklos Szeredi 2018-10-01 10:07:04 +0200 227)
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 228) /** RB node to be linked on fuse_conn->polled_files */
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 229) struct rb_node polled_node;
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 230)
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 231) /** Wait queue head for poll */
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 232) wait_queue_head_t poll_wait;
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 233)
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 234) /** Has flock been performed on this file? */
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 235) bool flock:1;
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 236) };
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 237)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 238) /** One input argument of a request */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 239) struct fuse_in_arg {
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 240) unsigned size;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 241) const void *value;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 242) };
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 243)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 244) /** One output argument of a request */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 245) struct fuse_arg {
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 246) unsigned size;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 247) void *value;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 248) };
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 249)
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 250) /** FUSE page descriptor */
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 251) struct fuse_page_desc {
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 252) unsigned int length;
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 253) unsigned int offset;
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 254) };
b2430d7567a37 (Maxim Patlasov 2012-10-26 19:49:24 +0400 255)
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 256) struct fuse_args {
d5b4854357f47 (Miklos Szeredi 2019-09-10 15:04:08 +0200 257) uint64_t nodeid;
1f4e9d03d1fbf (Miklos Szeredi 2019-09-10 15:04:08 +0200 258) uint32_t opcode;
1f4e9d03d1fbf (Miklos Szeredi 2019-09-10 15:04:08 +0200 259) unsigned short in_numargs;
1f4e9d03d1fbf (Miklos Szeredi 2019-09-10 15:04:08 +0200 260) unsigned short out_numargs;
c500ebaa908db (Miklos Szeredi 2019-09-10 15:04:08 +0200 261) bool force:1;
454a7613f54e6 (Miklos Szeredi 2019-09-10 15:04:08 +0200 262) bool noreply:1;
e413754b267e0 (Miklos Szeredi 2019-09-10 15:04:08 +0200 263) bool nocreds:1;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 264) bool in_pages:1;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 265) bool out_pages:1;
1f4e9d03d1fbf (Miklos Szeredi 2019-09-10 15:04:08 +0200 266) bool out_argvar:1;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 267) bool page_zeroing:1;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 268) bool page_replace:1;
bb737bbe48bea (Vivek Goyal 2020-04-20 17:01:34 +0200 269) bool may_block:1;
d5b4854357f47 (Miklos Szeredi 2019-09-10 15:04:08 +0200 270) struct fuse_in_arg in_args[3];
d5b4854357f47 (Miklos Szeredi 2019-09-10 15:04:08 +0200 271) struct fuse_arg out_args[2];
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 272) void (*end)(struct fuse_mount *fm, struct fuse_args *args, int error);
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 273) };
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 274)
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 275) struct fuse_args_pages {
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 276) struct fuse_args args;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 277) struct page **pages;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 278) struct fuse_page_desc *descs;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 279) unsigned int num_pages;
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 280) };
68583165f9627 (Miklos Szeredi 2019-09-10 15:04:09 +0200 281)
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 282) #define FUSE_ARGS(args) struct fuse_args args = {}
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 283)
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 284) /** The request IO state (for asynchronous processing) */
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 285) struct fuse_io_priv {
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 286) struct kref refcnt;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 287) int async;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 288) spinlock_t lock;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 289) unsigned reqs;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 290) ssize_t bytes;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 291) size_t size;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 292) __u64 offset;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 293) bool write;
61c12b49e1c9c (Ashish Samant 2017-07-12 19:26:58 -0700 294) bool should_dirty;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 295) int err;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 296) struct kiocb *iocb;
9d5722b7777e6 (Christoph Hellwig 2015-02-02 14:59:43 +0100 297) struct completion *done;
7879c4e58b7c8 (Ashish Sangwan 2016-04-07 17:18:11 +0530 298) bool blocking;
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 299) };
01e9d11a3e790 (Maxim Patlasov 2012-12-14 19:20:41 +0400 300)
e1c0eecba1a41 (Miklos Szeredi 2017-09-12 16:57:53 +0200 301) #define FUSE_IO_PRIV_SYNC(i) \
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 302) { \
1e24edca0557d (Peter Zijlstra 2016-11-14 17:12:23 +0100 303) .refcnt = KREF_INIT(1), \
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 304) .async = 0, \
e1c0eecba1a41 (Miklos Szeredi 2017-09-12 16:57:53 +0200 305) .iocb = i, \
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 306) }
744742d692e37 (Seth Forshee 2016-03-11 10:35:34 -0600 307)
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 308) /**
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 309) * Request flags
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 310) *
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 311) * FR_ISREPLY: set if the request has reply
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 312) * FR_FORCE: force sending of the request even if interrupted
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 313) * FR_BACKGROUND: request is sent in the background
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 314) * FR_WAITING: request is counted as "waiting"
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 315) * FR_ABORTED: the request was aborted
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 316) * FR_INTERRUPTED: the request has been interrupted
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 317) * FR_LOCKED: data is being copied to/from the request
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 318) * FR_PENDING: request is not yet in userspace
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 319) * FR_SENT: request is in userspace, waiting for an answer
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 320) * FR_FINISHED: request is finished
77cd9d488b32d (Miklos Szeredi 2015-07-01 16:26:06 +0200 321) * FR_PRIVATE: request is on private list
3e8cb8b2eaeb2 (Miklos Szeredi 2020-02-13 09:16:07 +0100 322) * FR_ASYNC: request is asynchronous
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 323) */
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 324) enum fuse_req_flag {
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 325) FR_ISREPLY,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 326) FR_FORCE,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 327) FR_BACKGROUND,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 328) FR_WAITING,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 329) FR_ABORTED,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 330) FR_INTERRUPTED,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 331) FR_LOCKED,
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 332) FR_PENDING,
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 333) FR_SENT,
33e14b4dfdc47 (Miklos Szeredi 2015-07-01 16:26:01 +0200 334) FR_FINISHED,
77cd9d488b32d (Miklos Szeredi 2015-07-01 16:26:06 +0200 335) FR_PRIVATE,
3e8cb8b2eaeb2 (Miklos Szeredi 2020-02-13 09:16:07 +0100 336) FR_ASYNC,
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 337) };
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 338)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 339) /**
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 340) * A request to the client
dc00809a53edd (Miklos Szeredi 2015-07-01 16:25:58 +0200 341) *
dc00809a53edd (Miklos Szeredi 2015-07-01 16:25:58 +0200 342) * .waitq.lock protects the following fields:
dc00809a53edd (Miklos Szeredi 2015-07-01 16:25:58 +0200 343) * - FR_ABORTED
dc00809a53edd (Miklos Szeredi 2015-07-01 16:25:58 +0200 344) * - FR_LOCKED (may also be modified under fc->lock, tested under both)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 345) */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 346) struct fuse_req {
ce1d5a491f0ee (Miklos Szeredi 2006-04-10 22:54:58 -0700 347) /** This can be on either pending processing or io lists in
ce1d5a491f0ee (Miklos Szeredi 2006-04-10 22:54:58 -0700 348) fuse_conn */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 349) struct list_head list;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 350)
a4d27e75ffb7b (Miklos Szeredi 2006-06-25 05:48:54 -0700 351) /** Entry on the interrupts list */
a4d27e75ffb7b (Miklos Szeredi 2006-06-25 05:48:54 -0700 352) struct list_head intr_entry;
a4d27e75ffb7b (Miklos Szeredi 2006-06-25 05:48:54 -0700 353)
1259728731a79 (Miklos Szeredi 2019-09-10 15:04:10 +0200 354) /* Input/output arguments */
1259728731a79 (Miklos Szeredi 2019-09-10 15:04:10 +0200 355) struct fuse_args *args;
1259728731a79 (Miklos Szeredi 2019-09-10 15:04:10 +0200 356)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 357) /** refcount */
ec99f6d31f259 (Elena Reshetova 2017-03-03 11:04:04 +0200 358) refcount_t count;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 359)
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 360) /* Request flags, updated with test/set/clear_bit() */
825d6d3395e88 (Miklos Szeredi 2015-07-01 16:25:58 +0200 361) unsigned long flags;
9bc5dddad1294 (Miklos Szeredi 2006-04-11 21:16:09 +0200 362)
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 363) /* The request input header */
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 364) struct {
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 365) struct fuse_in_header h;
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 366) } in;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 367)
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 368) /* The request output header */
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 369) struct {
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 370) struct fuse_out_header h;
d49937749fef2 (Miklos Szeredi 2019-09-10 15:04:11 +0200 371) } out;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 372)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 373) /** Used to wake up the task waiting for completion of request*/
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 374) wait_queue_head_t waitq;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 375)
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 376) #if IS_ENABLED(CONFIG_VIRTIO_FS)
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 377) /** virtio-fs's physically contiguous buffer for in and out args */
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 378) void *argbuf;
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 379) #endif
24754db2728a8 (Max Reitz 2020-04-20 17:54:38 +0200 380)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 381) /** fuse_mount this request belongs to */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 382) struct fuse_mount *fm;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 383) };
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 384)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 385) struct fuse_iqueue;
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 386)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 387) /**
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 388) * Input queue callbacks
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 389) *
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 390) * Input queue signalling is device-specific. For example, the /dev/fuse file
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 391) * uses fiq->waitq and fasync to wake processes that are waiting on queue
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 392) * readiness. These callbacks allow other device types to respond to input
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 393) * queue activity.
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 394) */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 395) struct fuse_iqueue_ops {
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 396) /**
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 397) * Signal that a forget has been queued
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 398) */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 399) void (*wake_forget_and_unlock)(struct fuse_iqueue *fiq)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 400) __releases(fiq->lock);
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 401)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 402) /**
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 403) * Signal that an INTERRUPT request has been queued
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 404) */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 405) void (*wake_interrupt_and_unlock)(struct fuse_iqueue *fiq)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 406) __releases(fiq->lock);
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 407)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 408) /**
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 409) * Signal that a request has been queued
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 410) */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 411) void (*wake_pending_and_unlock)(struct fuse_iqueue *fiq)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 412) __releases(fiq->lock);
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 413)
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 414) /**
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 415) * Clean up when fuse_iqueue is destroyed
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 416) */
a62a8ef9d97da (Stefan Hajnoczi 2018-06-12 09:41:17 +0100 417) void (*release)(struct fuse_iqueue *fiq);
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 418) };
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 419)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 420) /** /dev/fuse input queue operations */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 421) extern const struct fuse_iqueue_ops fuse_dev_fiq_ops;
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 422)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 423) struct fuse_iqueue {
e16714d8756dc (Miklos Szeredi 2015-07-01 16:26:01 +0200 424) /** Connection established */
e16714d8756dc (Miklos Szeredi 2015-07-01 16:26:01 +0200 425) unsigned connected;
e16714d8756dc (Miklos Szeredi 2015-07-01 16:26:01 +0200 426)
76e43c8ccaa35 (Eric Biggers 2019-09-08 20:15:18 -0700 427) /** Lock protecting accesses to members of this structure */
76e43c8ccaa35 (Eric Biggers 2019-09-08 20:15:18 -0700 428) spinlock_t lock;
76e43c8ccaa35 (Eric Biggers 2019-09-08 20:15:18 -0700 429)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 430) /** Readers of the connection are waiting on this */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 431) wait_queue_head_t waitq;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 432)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 433) /** The next unique request id */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 434) u64 reqctr;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 435)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 436) /** The list of pending requests */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 437) struct list_head pending;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 438)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 439) /** Pending interrupts */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 440) struct list_head interrupts;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 441)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 442) /** Queue of pending forgets */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 443) struct fuse_forget_link forget_list_head;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 444) struct fuse_forget_link *forget_list_tail;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 445)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 446) /** Batching of FORGET requests (positive indicates FORGET batch) */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 447) int forget_batch;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 448)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 449) /** O_ASYNC requests */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 450) struct fasync_struct *fasync;
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 451)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 452) /** Device-specific callbacks */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 453) const struct fuse_iqueue_ops *ops;
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 454)
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 455) /** Device-specific state */
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 456) void *priv;
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 457) };
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 458)
be2ff42c5d6eb (Kirill Tkhai 2018-09-11 13:12:14 +0300 459) #define FUSE_PQ_HASH_BITS 8
be2ff42c5d6eb (Kirill Tkhai 2018-09-11 13:12:14 +0300 460) #define FUSE_PQ_HASH_SIZE (1 << FUSE_PQ_HASH_BITS)
be2ff42c5d6eb (Kirill Tkhai 2018-09-11 13:12:14 +0300 461)
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 462) struct fuse_pqueue {
e96edd94d0887 (Miklos Szeredi 2015-07-01 16:26:04 +0200 463) /** Connection established */
e96edd94d0887 (Miklos Szeredi 2015-07-01 16:26:04 +0200 464) unsigned connected;
e96edd94d0887 (Miklos Szeredi 2015-07-01 16:26:04 +0200 465)
45a91cb1a4fd9 (Miklos Szeredi 2015-07-01 16:26:06 +0200 466) /** Lock protecting accessess to members of this structure */
45a91cb1a4fd9 (Miklos Szeredi 2015-07-01 16:26:06 +0200 467) spinlock_t lock;
45a91cb1a4fd9 (Miklos Szeredi 2015-07-01 16:26:06 +0200 468)
be2ff42c5d6eb (Kirill Tkhai 2018-09-11 13:12:14 +0300 469) /** Hash table of requests being processed */
be2ff42c5d6eb (Kirill Tkhai 2018-09-11 13:12:14 +0300 470) struct list_head *processing;
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 471)
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 472) /** The list of requests under I/O */
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 473) struct list_head io;
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 474) };
3a2b5b9cd9610 (Miklos Szeredi 2015-07-01 16:26:04 +0200 475)
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 476) /**
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 477) * Fuse device instance
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 478) */
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 479) struct fuse_dev {
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 480) /** Fuse connection for this device */
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 481) struct fuse_conn *fc;
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 482)
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 483) /** Processing queue */
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 484) struct fuse_pqueue pq;
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 485)
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 486) /** list entry on fc->devices */
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 487) struct list_head entry;
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 488) };
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 489)
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 490) struct fuse_fs_context {
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 491) int fd;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 492) unsigned int rootmode;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 493) kuid_t user_id;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 494) kgid_t group_id;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 495) bool is_bdev:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 496) bool fd_present:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 497) bool rootmode_present:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 498) bool user_id_present:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 499) bool group_id_present:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 500) bool default_permissions:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 501) bool allow_other:1;
783863d6476ce (Miklos Szeredi 2019-08-29 11:01:20 +0200 502) bool destroy:1;
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 503) bool no_control:1;
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 504) bool no_force_umount:1;
f4fd4ae354ba2 (Vivek Goyal 2020-08-19 18:19:45 -0400 505) bool legacy_opts_show:1;
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 506) bool dax:1;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 507) unsigned int max_read;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 508) unsigned int blksize;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 509) const char *subtype;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 510)
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 511) /* DAX device, may be NULL */
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 512) struct dax_device *dax_dev;
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 513)
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 514) /* fuse_dev pointer to fill in, should contain NULL on entry */
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 515) void **fudptr;
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 516) };
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 517)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 518) /**
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 519) * A Fuse connection.
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 520) *
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 521) * This structure is created, when the root filesystem is mounted, and
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 522) * is destroyed, when the client device is closed and the last
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 523) * fuse_mount is destroyed.
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 524) */
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 525) struct fuse_conn {
d713311464bcc (Miklos Szeredi 2006-04-10 22:54:55 -0700 526) /** Lock protecting accessess to members of this structure */
d713311464bcc (Miklos Szeredi 2006-04-10 22:54:55 -0700 527) spinlock_t lock;
d713311464bcc (Miklos Szeredi 2006-04-10 22:54:55 -0700 528)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 529) /** Refcount */
095fc40ace5ff (Elena Reshetova 2017-03-03 11:04:05 +0200 530) refcount_t count;
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 531)
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 532) /** Number of fuse_dev's */
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 533) atomic_t dev_count;
c3696046beb3a (Miklos Szeredi 2015-07-01 16:26:09 +0200 534)
dd3e2c55a45fe (Al Viro 2013-10-03 21:21:39 -0400 535) struct rcu_head rcu;
dd3e2c55a45fe (Al Viro 2013-10-03 21:21:39 -0400 536)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 537) /** The user id for this mount */
499dcf2024092 (Eric W. Biederman 2012-02-07 16:26:03 -0800 538) kuid_t user_id;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 539)
87729a5514e85 (Miklos Szeredi 2005-09-09 13:10:34 -0700 540) /** The group id for this mount */
499dcf2024092 (Eric W. Biederman 2012-02-07 16:26:03 -0800 541) kgid_t group_id;
87729a5514e85 (Miklos Szeredi 2005-09-09 13:10:34 -0700 542)
0b6e9ea041e6c (Seth Forshee 2014-07-02 16:29:19 -0500 543) /** The pid namespace for this mount */
0b6e9ea041e6c (Seth Forshee 2014-07-02 16:29:19 -0500 544) struct pid_namespace *pid_ns;
0b6e9ea041e6c (Seth Forshee 2014-07-02 16:29:19 -0500 545)
8cb08329b0809 (Eric W. Biederman 2018-02-21 11:18:07 -0600 546) /** The user namespace for this mount */
8cb08329b0809 (Eric W. Biederman 2018-02-21 11:18:07 -0600 547) struct user_namespace *user_ns;
8cb08329b0809 (Eric W. Biederman 2018-02-21 11:18:07 -0600 548)
db50b96c0f28a (Miklos Szeredi 2005-09-09 13:10:33 -0700 549) /** Maximum read size */
db50b96c0f28a (Miklos Szeredi 2005-09-09 13:10:33 -0700 550) unsigned max_read;
db50b96c0f28a (Miklos Szeredi 2005-09-09 13:10:33 -0700 551)
413ef8cb30251 (Miklos Szeredi 2005-09-09 13:10:35 -0700 552) /** Maximum write size */
413ef8cb30251 (Miklos Szeredi 2005-09-09 13:10:35 -0700 553) unsigned max_write;
413ef8cb30251 (Miklos Szeredi 2005-09-09 13:10:35 -0700 554)
4b91459ad283a (Connor Kuehl 2021-03-18 08:52:23 -0500 555) /** Maximum number of pages that can be used in a single request */
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 556) unsigned int max_pages;
5da784cce4308 (Constantine Shulyupin 2018-09-06 15:37:06 +0300 557)
a7f0d7aab0b4f (Connor Kuehl 2021-03-18 08:52:22 -0500 558) /** Constrain ->max_pages to this value during feature negotiation */
a7f0d7aab0b4f (Connor Kuehl 2021-03-18 08:52:22 -0500 559) unsigned int max_pages_limit;
a7f0d7aab0b4f (Connor Kuehl 2021-03-18 08:52:22 -0500 560)
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 561) /** Input queue */
f88996a933244 (Miklos Szeredi 2015-07-01 16:26:01 +0200 562) struct fuse_iqueue iq;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 563)
acf99433d98c2 (Tejun Heo 2008-11-26 12:03:55 +0100 564) /** The next unique kernel file handle */
75126f5504524 (Miklos Szeredi 2019-01-24 10:40:17 +0100 565) atomic64_t khctr;
acf99433d98c2 (Tejun Heo 2008-11-26 12:03:55 +0100 566)
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 567) /** rbtree of fuse_files waiting for poll events indexed by ph */
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 568) struct rb_root polled_files;
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 569)
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 570) /** Maximum number of outstanding background requests */
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 571) unsigned max_background;
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 572)
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 573) /** Number of background requests at which congestion starts */
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 574) unsigned congestion_threshold;
7a6d3c8b3049d (Csaba Henk 2009-07-01 17:28:41 -0700 575)
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 576) /** Number of requests currently in the background */
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 577) unsigned num_background;
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 578)
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 579) /** Number of background requests currently queued for userspace */
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 580) unsigned active_background;
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 581)
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 582) /** The list of background requests set aside for later queuing */
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 583) struct list_head bg_queue;
d12def1bcb809 (Miklos Szeredi 2008-02-06 01:38:39 -0800 584)
ae2dffa39485c (Kirill Tkhai 2018-08-27 18:29:46 +0300 585) /** Protects: max_background, congestion_threshold, num_background,
ae2dffa39485c (Kirill Tkhai 2018-08-27 18:29:46 +0300 586) * active_background, bg_queue, blocked */
ae2dffa39485c (Kirill Tkhai 2018-08-27 18:29:46 +0300 587) spinlock_t bg_lock;
ae2dffa39485c (Kirill Tkhai 2018-08-27 18:29:46 +0300 588)
796523fb24028 (Maxim Patlasov 2013-03-21 18:02:15 +0400 589) /** Flag indicating that INIT reply has been received. Allocating
796523fb24028 (Maxim Patlasov 2013-03-21 18:02:15 +0400 590) * any fuse request will be suspended until the flag is set */
796523fb24028 (Maxim Patlasov 2013-03-21 18:02:15 +0400 591) int initialized;
796523fb24028 (Maxim Patlasov 2013-03-21 18:02:15 +0400 592)
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 593) /** Flag indicating if connection is blocked. This will be
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 594) the case before the INIT reply is received, and if there
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 595) are too many outstading backgrounds requests */
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 596) int blocked;
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 597)
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 598) /** waitq for blocked connection */
08a53cdce62d3 (Miklos Szeredi 2006-04-10 22:54:59 -0700 599) wait_queue_head_t blocked_waitq;
de5e3dec421c4 (Miklos Szeredi 2007-10-16 23:31:00 -0700 600)
69a53bf267fa5 (Miklos Szeredi 2006-01-16 22:14:41 -0800 601) /** Connection established, cleared on umount, connection
69a53bf267fa5 (Miklos Szeredi 2006-01-16 22:14:41 -0800 602) abort and device release */
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 603) unsigned connected;
1e9a4ed9396e9 (Miklos Szeredi 2005-09-09 13:10:31 -0700 604)
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 605) /** Connection aborted via sysfs */
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 606) bool aborted;
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 607)
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 608) /** Connection failed (version mismatch). Cannot race with
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 609) setting other bitfields since it is only set once in INIT
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 610) reply, before any other request, and never cleared */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 611) unsigned conn_error:1;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 612)
0ec7ca41f6f0f (Miklos Szeredi 2006-12-06 20:35:52 -0800 613) /** Connection successful. Only set in INIT */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 614) unsigned conn_init:1;
0ec7ca41f6f0f (Miklos Szeredi 2006-12-06 20:35:52 -0800 615)
9cd684551124e (Miklos Szeredi 2006-02-01 03:04:40 -0800 616) /** Do readpages asynchronously? Only set in INIT */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 617) unsigned async_read:1;
9cd684551124e (Miklos Szeredi 2006-02-01 03:04:40 -0800 618)
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 619) /** Return an unique read error after abort. Only set in INIT */
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 620) unsigned abort_err:1;
3b7008b226f3d (Szymon Lukasz 2017-11-09 21:23:35 +0100 621)
6ff958edbf39c (Miklos Szeredi 2007-10-18 03:07:02 -0700 622) /** Do not send separate SETATTR request before open(O_TRUNC) */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 623) unsigned atomic_o_trunc:1;
6ff958edbf39c (Miklos Szeredi 2007-10-18 03:07:02 -0700 624)
33670fa296860 (Miklos Szeredi 2008-07-25 01:49:02 -0700 625) /** Filesystem supports NFS exporting. Only set in INIT */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 626) unsigned export_support:1;
33670fa296860 (Miklos Szeredi 2008-07-25 01:49:02 -0700 627)
d5cd66c58edf1 (Pavel Emelyanov 2013-10-10 17:10:30 +0400 628) /** write-back cache policy (default is write-through) */
d5cd66c58edf1 (Pavel Emelyanov 2013-10-10 17:10:30 +0400 629) unsigned writeback_cache:1;
d5cd66c58edf1 (Pavel Emelyanov 2013-10-10 17:10:30 +0400 630)
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 631) /** allow parallel lookups and readdir (default is serialized) */
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 632) unsigned parallel_dirops:1;
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 633)
5e940c1dd3c1f (Miklos Szeredi 2016-10-01 07:32:32 +0200 634) /** handle fs handles killing suid/sgid/cap on write/chown/trunc */
5e940c1dd3c1f (Miklos Szeredi 2016-10-01 07:32:32 +0200 635) unsigned handle_killpriv:1;
5e940c1dd3c1f (Miklos Szeredi 2016-10-01 07:32:32 +0200 636)
5571f1e65486b (Dan Schatzberg 2018-10-11 08:17:00 -0700 637) /** cache READLINK responses in page cache */
5571f1e65486b (Dan Schatzberg 2018-10-11 08:17:00 -0700 638) unsigned cache_symlinks:1;
5571f1e65486b (Dan Schatzberg 2018-10-11 08:17:00 -0700 639)
f4fd4ae354ba2 (Vivek Goyal 2020-08-19 18:19:45 -0400 640) /* show legacy mount options */
f4fd4ae354ba2 (Vivek Goyal 2020-08-19 18:19:45 -0400 641) unsigned int legacy_opts_show:1;
f4fd4ae354ba2 (Vivek Goyal 2020-08-19 18:19:45 -0400 642)
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 643) /*
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 644) * fs kills suid/sgid/cap on write/chown/trunc. suid is killed on
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 645) * write/trunc only if caller did not have CAP_FSETID. sgid is killed
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 646) * on write/truncate only if caller did not have CAP_FSETID as well as
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 647) * file has group execute permission.
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 648) */
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 649) unsigned handle_killpriv_v2:1;
63f9909ff6020 (Vivek Goyal 2020-10-09 14:15:07 -0400 650)
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 651) /*
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 652) * The following bitfields are only for optimization purposes
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 653) * and hence races in setting them will not cause malfunction
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 654) */
095da6cbb6a1c (Miklos Szeredi 2006-01-16 22:14:52 -0800 655)
7678ac50615d9 (Andrew Gallagher 2013-11-05 16:05:52 +0100 656) /** Is open/release not implemented by fs? */
7678ac50615d9 (Andrew Gallagher 2013-11-05 16:05:52 +0100 657) unsigned no_open:1;
7678ac50615d9 (Andrew Gallagher 2013-11-05 16:05:52 +0100 658)
d9a9ea94f748f (Chad Austin 2019-01-07 16:53:17 -0800 659) /** Is opendir/releasedir not implemented by fs? */
d9a9ea94f748f (Chad Austin 2019-01-07 16:53:17 -0800 660) unsigned no_opendir:1;
d9a9ea94f748f (Chad Austin 2019-01-07 16:53:17 -0800 661)
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 662) /** Is fsync not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 663) unsigned no_fsync:1;
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 664)
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 665) /** Is fsyncdir not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 666) unsigned no_fsyncdir:1;
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 667)
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 668) /** Is flush not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 669) unsigned no_flush:1;
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 670)
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 671) /** Is setxattr not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 672) unsigned no_setxattr:1;
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 673)
52a4c95f4d24b (Vivek Goyal 2021-03-25 11:18:22 -0400 674) /** Does file server support extended setxattr */
52a4c95f4d24b (Vivek Goyal 2021-03-25 11:18:22 -0400 675) unsigned setxattr_ext:1;
52a4c95f4d24b (Vivek Goyal 2021-03-25 11:18:22 -0400 676)
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 677) /** Is getxattr not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 678) unsigned no_getxattr:1;
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 679)
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 680) /** Is listxattr not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 681) unsigned no_listxattr:1;
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 682)
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 683) /** Is removexattr not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 684) unsigned no_removexattr:1;
92a8780e1136c (Miklos Szeredi 2005-09-09 13:10:31 -0700 685)
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 686) /** Are posix file locking primitives not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 687) unsigned no_lock:1;
7142125937e14 (Miklos Szeredi 2006-06-25 05:48:52 -0700 688)
31d40d74b402a (Miklos Szeredi 2005-11-07 00:59:50 -0800 689) /** Is access not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 690) unsigned no_access:1;
31d40d74b402a (Miklos Szeredi 2005-11-07 00:59:50 -0800 691)
fd72faac95d7e (Miklos Szeredi 2005-11-07 00:59:51 -0800 692) /** Is create not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 693) unsigned no_create:1;
fd72faac95d7e (Miklos Szeredi 2005-11-07 00:59:51 -0800 694)
a4d27e75ffb7b (Miklos Szeredi 2006-06-25 05:48:54 -0700 695) /** Is interrupt not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 696) unsigned no_interrupt:1;
a4d27e75ffb7b (Miklos Szeredi 2006-06-25 05:48:54 -0700 697)
b2d2272fae1e1 (Miklos Szeredi 2006-12-06 20:35:51 -0800 698) /** Is bmap not implemented by fs? */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 699) unsigned no_bmap:1;
b2d2272fae1e1 (Miklos Szeredi 2006-12-06 20:35:51 -0800 700)
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 701) /** Is poll not implemented by fs? */
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 702) unsigned no_poll:1;
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 703)
78bb6cb9a890d (Miklos Szeredi 2008-05-12 14:02:32 -0700 704) /** Do multi-page cached writes */
1729a16c2c92b (Miklos Szeredi 2008-11-26 12:03:54 +0100 705) unsigned big_writes:1;
78bb6cb9a890d (Miklos Szeredi 2008-05-12 14:02:32 -0700 706)
e0a43ddcc08c3 (Miklos Szeredi 2009-06-30 20:12:23 +0200 707) /** Don't apply umask to creation modes */
e0a43ddcc08c3 (Miklos Szeredi 2009-06-30 20:12:23 +0200 708) unsigned dont_mask:1;
e0a43ddcc08c3 (Miklos Szeredi 2009-06-30 20:12:23 +0200 709)
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 710) /** Are BSD file locking primitives not implemented by fs? */
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 711) unsigned no_flock:1;
37fb3a30b4623 (Miklos Szeredi 2011-08-08 16:08:08 +0200 712)
519c6040ce044 (Miklos Szeredi 2012-04-26 10:56:36 +0200 713) /** Is fallocate not implemented by fs? */
519c6040ce044 (Miklos Szeredi 2012-04-26 10:56:36 +0200 714) unsigned no_fallocate:1;
519c6040ce044 (Miklos Szeredi 2012-04-26 10:56:36 +0200 715)
1560c974dcd40 (Miklos Szeredi 2014-04-28 16:43:44 +0200 716) /** Is rename with flags implemented by fs? */
1560c974dcd40 (Miklos Szeredi 2014-04-28 16:43:44 +0200 717) unsigned no_rename2:1;
1560c974dcd40 (Miklos Szeredi 2014-04-28 16:43:44 +0200 718)
72d0d248ca823 (Brian Foster 2012-07-16 15:23:48 -0400 719) /** Use enhanced/automatic page cache invalidation. */
72d0d248ca823 (Brian Foster 2012-07-16 15:23:48 -0400 720) unsigned auto_inval_data:1;
72d0d248ca823 (Brian Foster 2012-07-16 15:23:48 -0400 721)
aa6ff555f0e62 (Bhaskar Chowdhury 2021-03-26 06:46:42 +0530 722) /** Filesystem is fully responsible for page cache invalidation. */
ad2ba64dd4898 (Kirill Smelkov 2019-03-27 11:14:15 +0000 723) unsigned explicit_inval_data:1;
ad2ba64dd4898 (Kirill Smelkov 2019-03-27 11:14:15 +0000 724)
634734b63ac39 (Eric Wong 2013-02-06 22:29:01 +0000 725) /** Does the filesystem support readdirplus? */
0b05b18381eea (Anand V. Avati 2012-08-19 08:53:23 -0400 726) unsigned do_readdirplus:1;
0b05b18381eea (Anand V. Avati 2012-08-19 08:53:23 -0400 727)
634734b63ac39 (Eric Wong 2013-02-06 22:29:01 +0000 728) /** Does the filesystem want adaptive readdirplus? */
634734b63ac39 (Eric Wong 2013-02-06 22:29:01 +0000 729) unsigned readdirplus_auto:1;
634734b63ac39 (Eric Wong 2013-02-06 22:29:01 +0000 730)
60b9df7a54804 (Miklos Szeredi 2013-05-01 14:37:21 +0200 731) /** Does the filesystem support asynchronous direct-IO submission? */
60b9df7a54804 (Miklos Szeredi 2013-05-01 14:37:21 +0200 732) unsigned async_dio:1;
60b9df7a54804 (Miklos Szeredi 2013-05-01 14:37:21 +0200 733)
0b5da8db145bf (Ravishankar N 2015-06-30 23:40:22 +0530 734) /** Is lseek not implemented by fs? */
0b5da8db145bf (Ravishankar N 2015-06-30 23:40:22 +0530 735) unsigned no_lseek:1;
0b5da8db145bf (Ravishankar N 2015-06-30 23:40:22 +0530 736)
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 737) /** Does the filesystem support posix acls? */
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 738) unsigned posix_acl:1;
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 739)
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 740) /** Check permissions based on the file mode or not? */
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 741) unsigned default_permissions:1;
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 742)
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 743) /** Allow other than the mounter user to access the filesystem ? */
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 744) unsigned allow_other:1;
29433a2991fa6 (Miklos Szeredi 2016-10-01 07:32:32 +0200 745)
88bc7d5097a11 (Niels de Vos 2018-08-21 14:36:31 +0200 746) /** Does the filesystem support copy_file_range? */
88bc7d5097a11 (Niels de Vos 2018-08-21 14:36:31 +0200 747) unsigned no_copy_file_range:1;
88bc7d5097a11 (Niels de Vos 2018-08-21 14:36:31 +0200 748)
1ccd1ea249622 (Miklos Szeredi 2019-09-10 15:04:09 +0200 749) /* Send DESTROY request */
1ccd1ea249622 (Miklos Szeredi 2019-09-10 15:04:09 +0200 750) unsigned int destroy:1;
1ccd1ea249622 (Miklos Szeredi 2019-09-10 15:04:09 +0200 751)
8fab010644363 (Miklos Szeredi 2018-08-15 17:42:34 +0200 752) /* Delete dentries that have gone stale */
8fab010644363 (Miklos Szeredi 2018-08-15 17:42:34 +0200 753) unsigned int delete_stale:1;
8fab010644363 (Miklos Szeredi 2018-08-15 17:42:34 +0200 754)
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 755) /** Do not create entry in fusectl fs */
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 756) unsigned int no_control:1;
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 757)
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 758) /** Do not allow MNT_FORCE umount */
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 759) unsigned int no_force_umount:1;
15c8e72e88e0b (Vivek Goyal 2019-05-06 15:35:43 -0400 760)
bf109c64040f5 (Max Reitz 2020-04-21 14:47:15 +0200 761) /* Auto-mount submounts announced by the server */
bf109c64040f5 (Max Reitz 2020-04-21 14:47:15 +0200 762) unsigned int auto_submounts:1;
bf109c64040f5 (Max Reitz 2020-04-21 14:47:15 +0200 763)
6ba041fc3c441 (Greg Kurz 2021-05-20 17:46:54 +0200 764) /* Propagate syncfs() to server */
6ba041fc3c441 (Greg Kurz 2021-05-20 17:46:54 +0200 765) unsigned int sync_fs:1;
6ba041fc3c441 (Greg Kurz 2021-05-20 17:46:54 +0200 766)
0cd5b88553acf (Miklos Szeredi 2006-01-16 22:14:38 -0800 767) /** The number of requests waiting for completion */
0cd5b88553acf (Miklos Szeredi 2006-01-16 22:14:38 -0800 768) atomic_t num_waiting;
0cd5b88553acf (Miklos Szeredi 2006-01-16 22:14:38 -0800 769)
45714d6561840 (Miklos Szeredi 2006-01-06 00:19:36 -0800 770) /** Negotiated minor version */
45714d6561840 (Miklos Szeredi 2006-01-06 00:19:36 -0800 771) unsigned minor;
45714d6561840 (Miklos Szeredi 2006-01-06 00:19:36 -0800 772)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 773) /** Entry on the fuse_mount_list */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 774) struct list_head entry;
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 775)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 776) /** Device ID from the root super block */
b6f2fcbcfca9d (Miklos Szeredi 2008-04-30 00:54:34 -0700 777) dev_t dev;
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 778)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 779) /** Dentries in the control filesystem */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 780) struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES];
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 781)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 782) /** number of dentries used in the above array */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 783) int ctl_ndents;
385a17bfc3cb0 (Jeff Dike 2006-04-10 22:54:52 -0700 784)
9c8ef5614da22 (Miklos Szeredi 2006-06-25 05:48:55 -0700 785) /** Key for lock owner ID scrambling */
9c8ef5614da22 (Miklos Szeredi 2006-06-25 05:48:55 -0700 786) u32 scramble_key[4];
0ec7ca41f6f0f (Miklos Szeredi 2006-12-06 20:35:52 -0800 787)
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 788) /** Version counter for attribute changes */
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 789) atomic64_t attr_version;
43901aabd7a04 (Tejun Heo 2008-11-26 12:03:56 +0100 790)
43901aabd7a04 (Tejun Heo 2008-11-26 12:03:56 +0100 791) /** Called on final put */
43901aabd7a04 (Tejun Heo 2008-11-26 12:03:56 +0100 792) void (*release)(struct fuse_conn *);
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 793)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 794) /**
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 795) * Read/write semaphore to hold when accessing the sb of any
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 796) * fuse_mount belonging to this connection
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 797) */
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 798) struct rw_semaphore killsb;
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 799)
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 800) /** List of device instances belonging to this connection */
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 801) struct list_head devices;
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 802)
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 803) #ifdef CONFIG_FUSE_DAX
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 804) /* Dax specific conn data, non-NULL if DAX is enabled */
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 805) struct fuse_conn_dax *dax;
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 806) #endif
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 807)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 808) /** List of filesystems using this connection */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 809) struct list_head mounts;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 810) };
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 811)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 812) /*
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 813) * Represents a mounted filesystem, potentially a submount.
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 814) *
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 815) * This object allows sharing a fuse_conn between separate mounts to
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 816) * allow submounts with dedicated superblocks and thus separate device
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 817) * IDs.
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 818) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 819) struct fuse_mount {
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 820) /* Underlying (potentially shared) connection to the FUSE server */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 821) struct fuse_conn *fc;
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 822)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 823) /*
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 824) * Super block for this connection (fc->killsb must be held when
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 825) * accessing this).
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 826) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 827) struct super_block *sb;
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 828)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 829) /* Entry on fc->mounts */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 830) struct list_head fc_entry;
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 831) };
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 832)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 833) static inline struct fuse_mount *get_fuse_mount_super(struct super_block *sb)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 834) {
6383bdaa2ed2d (Miklos Szeredi 2006-01-16 22:14:29 -0800 835) return sb->s_fs_info;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 836) }
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 837)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 838) static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 839) {
bd3bf1e85bac1 (Miklos Szeredi 2020-11-11 17:22:32 +0100 840) return get_fuse_mount_super(sb)->fc;
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 841) }
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 842)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 843) static inline struct fuse_mount *get_fuse_mount(struct inode *inode)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 844) {
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 845) return get_fuse_mount_super(inode->i_sb);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 846) }
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 847)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 848) static inline struct fuse_conn *get_fuse_conn(struct inode *inode)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 849) {
bd3bf1e85bac1 (Miklos Szeredi 2020-11-11 17:22:32 +0100 850) return get_fuse_mount_super(inode->i_sb)->fc;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 851) }
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 852)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 853) static inline struct fuse_inode *get_fuse_inode(struct inode *inode)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 854) {
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 855) return container_of(inode, struct fuse_inode, inode);
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 856) }
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 857)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 858) static inline u64 get_node_id(struct inode *inode)
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 859) {
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 860) return get_fuse_inode(inode)->nodeid;
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 861) }
d8a5ba45457e4 (Miklos Szeredi 2005-09-09 13:10:26 -0700 862)
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 863) static inline int invalid_nodeid(u64 nodeid)
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 864) {
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 865) return !nodeid || nodeid == FUSE_ROOT_ID;
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 866) }
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 867)
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 868) static inline u64 fuse_get_attr_version(struct fuse_conn *fc)
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 869) {
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 870) return atomic64_read(&fc->attr_version);
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 871) }
4510d86fbbb36 (Kirill Tkhai 2018-11-09 13:33:17 +0300 872)
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 873) static inline bool fuse_stale_inode(const struct inode *inode, int generation,
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 874) struct fuse_attr *attr)
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 875) {
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 876) return inode->i_generation != generation ||
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 877) inode_wrong_type(inode, attr->mode);
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 878) }
c09a4ad6251f9 (Amir Goldstein 2021-06-21 14:03:53 +0300 879)
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 880) static inline void fuse_make_bad(struct inode *inode)
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 881) {
775c5033a0d16 (Amir Goldstein 2021-03-04 11:09:12 +0200 882) remove_inode_hash(inode);
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 883) set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state);
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 884) }
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 885)
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 886) static inline bool fuse_is_bad(struct inode *inode)
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 887) {
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 888) return unlikely(test_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state));
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 889) }
5d069dbe8aaf2 (Miklos Szeredi 2020-12-10 15:33:14 +0100 890)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 891) static inline struct page **fuse_pages_alloc(unsigned int npages, gfp_t flags,
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 892) struct fuse_page_desc **desc)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 893) {
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 894) struct page **pages;
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 895)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 896) pages = kzalloc(npages * (sizeof(struct page *) +
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 897) sizeof(struct fuse_page_desc)), flags);
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 898) *desc = (void *) (pages + npages);
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 899)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 900) return pages;
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 901) }
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 902)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 903) static inline void fuse_page_descs_length_init(struct fuse_page_desc *descs,
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 904) unsigned int index,
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 905) unsigned int nr_pages)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 906) {
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 907) int i;
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 908)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 909) for (i = index; i < index + nr_pages; i++)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 910) descs[i].length = PAGE_SIZE - descs[i].offset;
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 911) }
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 912)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 913) /** Device operations */
4b6f5d20b04dc (Arjan van de Ven 2006-03-28 01:56:42 -0800 914) extern const struct file_operations fuse_dev_operations;
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 915)
4269590a72934 (Al Viro 2009-02-20 05:59:13 +0000 916) extern const struct dentry_operations fuse_dentry_operations;
0ce267ff95a03 (Miklos Szeredi 2016-10-18 15:36:48 +0200 917) extern const struct dentry_operations fuse_root_dentry_operations;
dbd561d236ff1 (Miklos Szeredi 2008-07-25 01:49:00 -0700 918)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 919) /**
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 920) * Get a filled in inode
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 921) */
b48badf013018 (Miklos Szeredi 2008-04-30 00:54:44 -0700 922) struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 923) int generation, struct fuse_attr *attr,
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 924) u64 attr_valid, u64 attr_version);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 925)
13983d062f17f (Al Viro 2016-07-20 22:34:44 -0400 926) int fuse_lookup_name(struct super_block *sb, u64 nodeid, const struct qstr *name,
33670fa296860 (Miklos Szeredi 2008-07-25 01:49:02 -0700 927) struct fuse_entry_out *outarg, struct inode **inode);
33670fa296860 (Miklos Szeredi 2008-07-25 01:49:02 -0700 928)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 929) /**
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 930) * Send FORGET command
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 931) */
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 932) void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget,
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 933) u64 nodeid, u64 nlookup);
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 934)
07e77dca8a1f1 (Miklos Szeredi 2010-12-07 20:16:56 +0100 935) struct fuse_forget_link *fuse_alloc_forget(void);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 936)
4388c5aac4bae (Vivek Goyal 2019-06-05 15:50:43 -0400 937) struct fuse_forget_link *fuse_dequeue_forget(struct fuse_iqueue *fiq,
4388c5aac4bae (Vivek Goyal 2019-06-05 15:50:43 -0400 938) unsigned int max,
4388c5aac4bae (Vivek Goyal 2019-06-05 15:50:43 -0400 939) unsigned int *countp);
4388c5aac4bae (Vivek Goyal 2019-06-05 15:50:43 -0400 940)
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 941) /*
361b1eb55ea84 (Miklos Szeredi 2006-01-16 22:14:45 -0800 942) * Initialize READ or READDIR request
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 943) */
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 944) struct fuse_io_args {
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 945) union {
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 946) struct {
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 947) struct fuse_read_in in;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 948) u64 attr_ver;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 949) } read;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 950) struct {
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 951) struct fuse_write_in in;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 952) struct fuse_write_out out;
4f06dd92b5d0a (Vivek Goyal 2020-10-21 16:12:49 -0400 953) bool page_locked;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 954) } write;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 955) };
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 956) struct fuse_args_pages ap;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 957) struct fuse_io_priv *io;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 958) struct fuse_file *ff;
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 959) };
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 960)
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 961) void fuse_read_args_fill(struct fuse_io_args *ia, struct file *file, loff_t pos,
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 962) size_t count, int opcode);
43f5098eb82b1 (Miklos Szeredi 2019-09-10 15:04:10 +0200 963)
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 964)
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 965) /**
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 966) * Send OPEN or OPENDIR request
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 967) */
91fe96b403f8a (Miklos Szeredi 2009-04-28 16:56:37 +0200 968) int fuse_open_common(struct inode *inode, struct file *file, bool isdir);
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 969)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 970) struct fuse_file *fuse_file_alloc(struct fuse_mount *fm);
fd72faac95d7e (Miklos Szeredi 2005-11-07 00:59:51 -0800 971) void fuse_file_free(struct fuse_file *ff);
c7b7143c6342b (Miklos Szeredi 2009-04-28 16:56:37 +0200 972) void fuse_finish_open(struct inode *inode, struct file *file);
fd72faac95d7e (Miklos Szeredi 2005-11-07 00:59:51 -0800 973)
54d601cb67572 (Miklos Szeredi 2021-04-07 14:36:45 +0200 974) void fuse_sync_release(struct fuse_inode *fi, struct fuse_file *ff,
54d601cb67572 (Miklos Szeredi 2021-04-07 14:36:45 +0200 975) unsigned int flags);
c756e0a4d7920 (Miklos Szeredi 2007-10-16 23:31:00 -0700 976)
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 977) /**
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 978) * Send RELEASE or RELEASEDIR request
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 979) */
2e64ff154ce6c (Chad Austin 2018-12-10 10:54:52 -0800 980) void fuse_release_common(struct file *file, bool isdir);
04730fef1f9c7 (Miklos Szeredi 2005-09-09 13:10:36 -0700 981)
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 982) /**
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 983) * Send FSYNC or FSYNCDIR request
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 984) */
02c24a82187d5 (Josef Bacik 2011-07-16 20:44:56 -0400 985) int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
a9c2d1e82fc29 (Miklos Szeredi 2018-12-03 10:14:43 +0100 986) int datasync, int opcode);
8254798199332 (Miklos Szeredi 2005-09-09 13:10:38 -0700 987)
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 988) /**
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 989) * Notify poll wakeup
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 990) */
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 991) int fuse_notify_poll_wakeup(struct fuse_conn *fc,
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 992) struct fuse_notify_poll_wakeup_out *outarg);
95668a69a4bb8 (Tejun Heo 2008-11-26 12:03:55 +0100 993)
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 994) /**
1779381dea3ba (Miklos Szeredi 2005-10-30 15:02:51 -0800 995) * Initialize file operations on a regular file
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 996) */
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 997) void fuse_init_file_inode(struct inode *inode);
b6aeadeda22a9 (Miklos Szeredi 2005-09-09 13:10:30 -0700 998)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 999) /**
1779381dea3ba (Miklos Szeredi 2005-10-30 15:02:51 -0800 1000) * Initialize inode operations on regular files and special files
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1001) */
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1002) void fuse_init_common(struct inode *inode);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1003)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1004) /**
1779381dea3ba (Miklos Szeredi 2005-10-30 15:02:51 -0800 1005) * Initialize inode and file operations on a directory
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1006) */
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1007) void fuse_init_dir(struct inode *inode);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1008)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1009) /**
1779381dea3ba (Miklos Szeredi 2005-10-30 15:02:51 -0800 1010) * Initialize inode operations on a symlink
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1011) */
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1012) void fuse_init_symlink(struct inode *inode);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1013)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1014) /**
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1015) * Change attributes of an inode
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1016) */
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 1017) void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
1fb69e7817296 (Miklos Szeredi 2007-10-18 03:06:58 -0700 1018) u64 attr_valid, u64 attr_version);
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1019)
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1020) void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1021) u64 attr_valid);
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1022)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1023) /**
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1024) * Initialize the client device
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1025) */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1026) int fuse_dev_init(void);
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1027)
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1028) /**
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1029) * Cleanup the client device
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1030) */
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1031) void fuse_dev_cleanup(void);
334f485df85ac (Miklos Szeredi 2005-09-09 13:10:27 -0700 1032)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1033) int fuse_ctl_init(void);
7736e8cc51bbf (Fabian Frederick 2014-04-23 18:14:42 +0200 1034) void __exit fuse_ctl_cleanup(void);
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1035)
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 1036) /**
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 1037) * Simple request sending that does request allocation and freeing
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 1038) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1039) ssize_t fuse_simple_request(struct fuse_mount *fm, struct fuse_args *args);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1040) int fuse_simple_background(struct fuse_mount *fm, struct fuse_args *args,
1259728731a79 (Miklos Szeredi 2019-09-10 15:04:10 +0200 1041) gfp_t gfp_flags);
7078187a795f8 (Miklos Szeredi 2014-12-12 09:49:05 +0100 1042)
04ec5af0776e9 (Stefan Hajnoczi 2018-06-21 09:33:40 +0100 1043) /**
04ec5af0776e9 (Stefan Hajnoczi 2018-06-21 09:33:40 +0100 1044) * End a finished request
04ec5af0776e9 (Stefan Hajnoczi 2018-06-21 09:33:40 +0100 1045) */
8f622e9497bbb (Max Reitz 2020-04-20 17:59:34 +0200 1046) void fuse_request_end(struct fuse_req *req);
04ec5af0776e9 (Stefan Hajnoczi 2018-06-21 09:33:40 +0100 1047)
5a5fb1ea74d8b (Miklos Szeredi 2006-04-26 10:48:55 +0200 1048) /* Abort all requests */
eb98e3bdf3aa7 (Miklos Szeredi 2019-01-24 10:40:16 +0100 1049) void fuse_abort_conn(struct fuse_conn *fc);
b8f95e5d13f5f (Miklos Szeredi 2018-07-26 16:13:11 +0200 1050) void fuse_wait_aborted(struct fuse_conn *fc);
69a53bf267fa5 (Miklos Szeredi 2006-01-16 22:14:41 -0800 1051)
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1052) /**
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1053) * Invalidate inode attributes
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1054) */
e5e5558e923f3 (Miklos Szeredi 2005-09-09 13:10:28 -0700 1055) void fuse_invalidate_attr(struct inode *inode);
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1056)
dbd561d236ff1 (Miklos Szeredi 2008-07-25 01:49:00 -0700 1057) void fuse_invalidate_entry_cache(struct dentry *entry);
dbd561d236ff1 (Miklos Szeredi 2008-07-25 01:49:00 -0700 1058)
451418fc928b5 (Andrew Gallagher 2013-11-05 03:55:43 -0800 1059) void fuse_invalidate_atime(struct inode *inode);
451418fc928b5 (Andrew Gallagher 2013-11-05 03:55:43 -0800 1060)
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1061) u64 entry_attr_timeout(struct fuse_entry_out *o);
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1062) void fuse_change_entry_timeout(struct dentry *entry, struct fuse_entry_out *o);
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1063)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1064) /**
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1065) * Acquire reference to fuse_conn
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1066) */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1067) struct fuse_conn *fuse_conn_get(struct fuse_conn *fc);
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1068)
0d179aa59285c (Tejun Heo 2008-11-26 12:03:55 +0100 1069) /**
0d179aa59285c (Tejun Heo 2008-11-26 12:03:55 +0100 1070) * Initialize fuse_conn
0d179aa59285c (Tejun Heo 2008-11-26 12:03:55 +0100 1071) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1072) void fuse_conn_init(struct fuse_conn *fc, struct fuse_mount *fm,
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1073) struct user_namespace *user_ns,
ae3aad77f46fb (Stefan Hajnoczi 2018-06-18 15:53:19 +0100 1074) const struct fuse_iqueue_ops *fiq_ops, void *fiq_priv);
0d179aa59285c (Tejun Heo 2008-11-26 12:03:55 +0100 1075)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1076) /**
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1077) * Release reference to fuse_conn
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1078) */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1079) void fuse_conn_put(struct fuse_conn *fc);
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1080)
0cd1eb9a4160a (Vivek Goyal 2019-03-06 16:51:40 -0500 1081) struct fuse_dev *fuse_dev_alloc_install(struct fuse_conn *fc);
0cd1eb9a4160a (Vivek Goyal 2019-03-06 16:51:40 -0500 1082) struct fuse_dev *fuse_dev_alloc(void);
0cd1eb9a4160a (Vivek Goyal 2019-03-06 16:51:40 -0500 1083) void fuse_dev_install(struct fuse_dev *fud, struct fuse_conn *fc);
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 1084) void fuse_dev_free(struct fuse_dev *fud);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1085) void fuse_send_init(struct fuse_mount *fm);
cc080e9e9be16 (Miklos Szeredi 2015-07-01 16:26:08 +0200 1086)
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1087) /**
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1088) * Fill in superblock and initialize fuse connection
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1089) * @sb: partially-initialized superblock to fill in
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1090) * @ctx: mount context
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1091) */
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1092) int fuse_fill_super_common(struct super_block *sb, struct fuse_fs_context *ctx);
0cc2656cdb0b1 (Stefan Hajnoczi 2018-06-13 10:23:04 +0100 1093)
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1094) /*
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1095) * Fill in superblock for submounts
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1096) * @sb: partially-initialized superblock to fill in
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1097) * @parent_fi: The fuse_inode of the parent filesystem where this submount is
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1098) * mounted
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1099) */
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1100) int fuse_fill_super_submount(struct super_block *sb,
1866d779d5d2a (Max Reitz 2020-09-09 17:52:17 +0200 1101) struct fuse_inode *parent_fi);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1102)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1103) /*
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1104) * Remove the mount from the connection
783863d6476ce (Miklos Szeredi 2019-08-29 11:01:20 +0200 1105) *
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1106) * Returns whether this was the last mount
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1107) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1108) bool fuse_mount_remove(struct fuse_mount *fm);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1109)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1110) /*
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1111) * Shut down the connection (possibly sending DESTROY request).
783863d6476ce (Miklos Szeredi 2019-08-29 11:01:20 +0200 1112) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1113) void fuse_conn_destroy(struct fuse_mount *fm);
783863d6476ce (Miklos Szeredi 2019-08-29 11:01:20 +0200 1114)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1115) /**
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1116) * Add connection to control filesystem
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1117) */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1118) int fuse_ctl_add_conn(struct fuse_conn *fc);
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1119)
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1120) /**
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1121) * Remove connection from control filesystem
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1122) */
bafa96541b250 (Miklos Szeredi 2006-06-25 05:48:51 -0700 1123) void fuse_ctl_remove_conn(struct fuse_conn *fc);
a5bfffac645a7 (Timo Savola 2007-04-08 16:04:00 -0700 1124)
a5bfffac645a7 (Timo Savola 2007-04-08 16:04:00 -0700 1125) /**
a5bfffac645a7 (Timo Savola 2007-04-08 16:04:00 -0700 1126) * Is file type valid?
a5bfffac645a7 (Timo Savola 2007-04-08 16:04:00 -0700 1127) */
a5bfffac645a7 (Timo Savola 2007-04-08 16:04:00 -0700 1128) int fuse_valid_type(int m);
e57ac68378a28 (Miklos Szeredi 2007-10-18 03:06:58 -0700 1129)
eb59bd17d2fa6 (Miklos Szeredi 2019-11-12 11:49:04 +0100 1130) bool fuse_invalid_attr(struct fuse_attr *attr);
eb59bd17d2fa6 (Miklos Szeredi 2019-11-12 11:49:04 +0100 1131)
e57ac68378a28 (Miklos Szeredi 2007-10-18 03:06:58 -0700 1132) /**
c2132c1bc73d9 (Anatol Pomozov 2013-01-14 22:30:00 -0800 1133) * Is current process allowed to perform filesystem operation?
e57ac68378a28 (Miklos Szeredi 2007-10-18 03:06:58 -0700 1134) */
c2132c1bc73d9 (Anatol Pomozov 2013-01-14 22:30:00 -0800 1135) int fuse_allow_current_process(struct fuse_conn *fc);
f33321141b273 (Miklos Szeredi 2007-10-18 03:07:04 -0700 1136)
f33321141b273 (Miklos Szeredi 2007-10-18 03:07:04 -0700 1137) u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id);
bcb4be809d2a8 (Miklos Szeredi 2007-11-28 16:21:59 -0800 1138)
703c73629f934 (Seth Forshee 2016-08-29 08:46:36 -0500 1139) void fuse_update_ctime(struct inode *inode);
703c73629f934 (Seth Forshee 2016-08-29 08:46:36 -0500 1140)
5b97eeacbd80a (Miklos Szeredi 2017-09-12 16:57:54 +0200 1141) int fuse_update_attributes(struct inode *inode, struct file *file);
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1142)
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1143) void fuse_flush_writepages(struct inode *inode);
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1144)
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1145) void fuse_set_nowrite(struct inode *inode);
3be5a52b30aa5 (Miklos Szeredi 2008-04-30 00:54:41 -0700 1146) void fuse_release_nowrite(struct inode *inode);
5c5c5e51b2641 (Miklos Szeredi 2008-04-30 00:54:43 -0700 1147)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1148) /**
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1149) * Scan all fuse_mounts belonging to fc to find the first where
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1150) * ilookup5() returns a result. Return that result and the
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1151) * respective fuse_mount in *fm (unless fm is NULL).
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1152) *
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1153) * The caller must hold fc->killsb.
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1154) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1155) struct inode *fuse_ilookup(struct fuse_conn *fc, u64 nodeid,
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1156) struct fuse_mount **fm);
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1157)
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1158) /**
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1159) * File-system tells the kernel to invalidate cache for the given node id.
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1160) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1161) int fuse_reverse_inval_inode(struct fuse_conn *fc, u64 nodeid,
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1162) loff_t offset, loff_t len);
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1163)
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1164) /**
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1165) * File-system tells the kernel to invalidate parent attributes and
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1166) * the dentry matching parent/name.
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1167) *
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1168) * If the child_nodeid is non-zero and:
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1169) * - matches the inode number for the dentry matching parent/name,
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1170) * - is not a mount point
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1171) * - is a file or oan empty directory
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1172) * then the dentry is unhashed (d_delete()).
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1173) */
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1174) int fuse_reverse_inval_entry(struct fuse_conn *fc, u64 parent_nodeid,
451d0f599934f (John Muir 2011-12-06 21:50:06 +0100 1175) u64 child_nodeid, struct qstr *name);
3b463ae0c6264 (John Muir 2009-05-31 11:13:57 -0400 1176)
fcee216beb9c1 (Max Reitz 2020-05-06 17:44:12 +0200 1177) int fuse_do_open(struct fuse_mount *fm, u64 nodeid, struct file *file,
08cbf542bf24f (Tejun Heo 2009-04-14 10:54:53 +0900 1178) bool isdir);
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1179)
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1180) /**
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1181) * fuse_direct_io() flags
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1182) */
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1183)
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1184) /** If set, it is WRITE; otherwise - READ */
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1185) #define FUSE_DIO_WRITE (1 << 0)
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1186)
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1187) /** CUSE pass fuse_direct_io() a file which f_mapping->host is not from FUSE */
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1188) #define FUSE_DIO_CUSE (1 << 1)
ea8cd33390faf (Pavel Emelyanov 2013-10-10 17:12:05 +0400 1189)
d22a943f44c79 (Al Viro 2014-03-16 15:50:47 -0400 1190) ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
d22a943f44c79 (Al Viro 2014-03-16 15:50:47 -0400 1191) loff_t *ppos, int flags);
08cbf542bf24f (Tejun Heo 2009-04-14 10:54:53 +0900 1192) long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
08cbf542bf24f (Tejun Heo 2009-04-14 10:54:53 +0900 1193) unsigned int flags);
b18da0c56e9ff (Miklos Szeredi 2011-12-13 11:58:49 +0100 1194) long fuse_ioctl_common(struct file *file, unsigned int cmd,
b18da0c56e9ff (Miklos Szeredi 2011-12-13 11:58:49 +0100 1195) unsigned long arg, unsigned int flags);
076ccb76e1a6c (Al Viro 2017-07-03 01:02:18 -0400 1196) __poll_t fuse_file_poll(struct file *file, poll_table *wait);
08cbf542bf24f (Tejun Heo 2009-04-14 10:54:53 +0900 1197) int fuse_dev_release(struct inode *inode, struct file *file);
08cbf542bf24f (Tejun Heo 2009-04-14 10:54:53 +0900 1198)
b0aa760652179 (Maxim Patlasov 2013-12-26 19:51:11 +0400 1199) bool fuse_write_update_size(struct inode *inode, loff_t pos);
b0aa760652179 (Maxim Patlasov 2013-12-26 19:51:11 +0400 1200)
ab9e13f7c771b (Maxim Patlasov 2014-04-28 14:19:24 +0200 1201) int fuse_flush_times(struct inode *inode, struct fuse_file *ff);
1e18bda86e2dc (Miklos Szeredi 2014-04-28 14:19:23 +0200 1202) int fuse_write_inode(struct inode *inode, struct writeback_control *wbc);
a1d75f258230b (Miklos Szeredi 2010-07-12 14:41:40 +0200 1203)
62490330769c1 (Jan Kara 2016-05-26 17:12:41 +0200 1204) int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
efb9fa9e911b2 (Maxim Patlasov 2012-12-18 14:05:08 +0400 1205) struct file *file);
efb9fa9e911b2 (Maxim Patlasov 2012-12-18 14:05:08 +0400 1206)
9759bd5189945 (Miklos Szeredi 2015-01-06 10:45:35 +0100 1207) void fuse_set_initialized(struct fuse_conn *fc);
9759bd5189945 (Miklos Szeredi 2015-01-06 10:45:35 +0100 1208)
63576c13bd178 (Miklos Szeredi 2018-07-26 16:13:11 +0200 1209) void fuse_unlock_inode(struct inode *inode, bool locked);
63576c13bd178 (Miklos Szeredi 2018-07-26 16:13:11 +0200 1210) bool fuse_lock_inode(struct inode *inode);
5c672ab3f0ee0 (Miklos Szeredi 2016-06-30 13:10:49 +0200 1211)
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1212) int fuse_setxattr(struct inode *inode, const char *name, const void *value,
52a4c95f4d24b (Vivek Goyal 2021-03-25 11:18:22 -0400 1213) size_t size, int flags, unsigned int extra_flags);
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1214) ssize_t fuse_getxattr(struct inode *inode, const char *name, void *value,
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1215) size_t size);
703c73629f934 (Seth Forshee 2016-08-29 08:46:36 -0500 1216) ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size);
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1217) int fuse_removexattr(struct inode *inode, const char *name);
703c73629f934 (Seth Forshee 2016-08-29 08:46:36 -0500 1218) extern const struct xattr_handler *fuse_xattr_handlers[];
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1219) extern const struct xattr_handler *fuse_acl_xattr_handlers[];
e45b2546e23c2 (Eric W. Biederman 2018-05-04 11:47:28 -0500 1220) extern const struct xattr_handler *fuse_no_acl_xattr_handlers[];
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1221)
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1222) struct posix_acl;
60bcc88ad185d (Seth Forshee 2016-08-29 08:46:37 -0500 1223) struct posix_acl *fuse_get_acl(struct inode *inode, int type);
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 1224) int fuse_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
549c7297717c3 (Christian Brauner 2021-01-21 14:19:43 +0100 1225) struct posix_acl *acl, int type);
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1226)
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1227) /* readdir.c */
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1228) int fuse_readdir(struct file *file, struct dir_context *ctx);
d123d8e1833c5 (Miklos Szeredi 2018-09-28 16:43:23 +0200 1229)
14d46d7abc397 (Stefan Hajnoczi 2018-06-21 09:34:25 +0100 1230) /**
14d46d7abc397 (Stefan Hajnoczi 2018-06-21 09:34:25 +0100 1231) * Return the number of bytes in an arguments list
14d46d7abc397 (Stefan Hajnoczi 2018-06-21 09:34:25 +0100 1232) */
14d46d7abc397 (Stefan Hajnoczi 2018-06-21 09:34:25 +0100 1233) unsigned int fuse_len_args(unsigned int numargs, struct fuse_arg *args);
14d46d7abc397 (Stefan Hajnoczi 2018-06-21 09:34:25 +0100 1234)
79d96efffda75 (Stefan Hajnoczi 2018-06-22 13:48:30 +0100 1235) /**
79d96efffda75 (Stefan Hajnoczi 2018-06-22 13:48:30 +0100 1236) * Get the next unique ID for a request
79d96efffda75 (Stefan Hajnoczi 2018-06-22 13:48:30 +0100 1237) */
79d96efffda75 (Stefan Hajnoczi 2018-06-22 13:48:30 +0100 1238) u64 fuse_get_unique(struct fuse_iqueue *fiq);
783863d6476ce (Miklos Szeredi 2019-08-29 11:01:20 +0200 1239) void fuse_free_conn(struct fuse_conn *fc);
79d96efffda75 (Stefan Hajnoczi 2018-06-22 13:48:30 +0100 1240)
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 1241) /* dax.c */
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 1242)
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1243) #define FUSE_IS_DAX(inode) (IS_ENABLED(CONFIG_FUSE_DAX) && IS_DAX(inode))
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1244)
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1245) ssize_t fuse_dax_read_iter(struct kiocb *iocb, struct iov_iter *to);
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1246) ssize_t fuse_dax_write_iter(struct kiocb *iocb, struct iov_iter *from);
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1247) int fuse_dax_mmap(struct file *file, struct vm_area_struct *vma);
6ae330cad6ef2 (Vivek Goyal 2020-08-19 18:19:54 -0400 1248) int fuse_dax_break_layouts(struct inode *inode, u64 dmap_start, u64 dmap_end);
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 1249) int fuse_dax_conn_alloc(struct fuse_conn *fc, struct dax_device *dax_dev);
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 1250) void fuse_dax_conn_free(struct fuse_conn *fc);
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1251) bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi);
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1252) void fuse_dax_inode_init(struct inode *inode);
c2d0ad00d948d (Vivek Goyal 2020-08-19 18:19:51 -0400 1253) void fuse_dax_inode_cleanup(struct inode *inode);
fd1a1dc6f5aa7 (Stefan Hajnoczi 2020-08-19 18:19:49 -0400 1254) bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment);
9a752d18c85ae (Vivek Goyal 2020-08-19 18:19:56 -0400 1255) void fuse_dax_cancel_work(struct fuse_conn *fc);
1dd539577c42b (Vivek Goyal 2020-08-19 18:19:47 -0400 1256)
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 1257) /* ioctl.c */
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 1258) long fuse_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 1259) long fuse_file_compat_ioctl(struct file *file, unsigned int cmd,
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 1260) unsigned long arg);
72227eac177dd (Miklos Szeredi 2021-04-08 11:11:19 +0200 1261) int fuse_fileattr_get(struct dentry *dentry, struct fileattr *fa);
72227eac177dd (Miklos Szeredi 2021-04-08 11:11:19 +0200 1262) int fuse_fileattr_set(struct user_namespace *mnt_userns,
72227eac177dd (Miklos Szeredi 2021-04-08 11:11:19 +0200 1263) struct dentry *dentry, struct fileattr *fa);
9ac29fd3f87ff (Miklos Szeredi 2021-04-07 14:36:45 +0200 1264)
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1265) /* file.c */
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1266)
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1267) struct fuse_file *fuse_file_open(struct fuse_mount *fm, u64 nodeid,
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1268) unsigned int open_flags, bool isdir);
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1269) void fuse_file_release(struct inode *inode, struct fuse_file *ff,
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1270) unsigned int open_flags, fl_owner_t id, bool isdir);
b9d54c6f29d9d (Miklos Szeredi 2021-04-07 14:36:45 +0200 1271)
29d434b39c807 (Tejun Heo 2008-10-16 16:08:57 +0200 1272) #endif /* _FS_FUSE_I_H */
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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