Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 2 | /* fs/ internal definitions |
| 3 | * |
| 4 | * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. |
| 5 | * Written by David Howells (dhowells@redhat.com) |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 6 | */ |
| 7 | |
Andrew Morton | 5e6d12b | 2006-08-31 12:55:23 +0200 | [diff] [blame] | 8 | struct super_block; |
Al Viro | 9d412a4 | 2011-03-17 22:08:28 -0400 | [diff] [blame] | 9 | struct file_system_type; |
Christoph Hellwig | ae259a9 | 2016-06-21 09:23:11 +1000 | [diff] [blame] | 10 | struct iomap; |
Christoph Hellwig | befb503 | 2016-09-19 11:24:49 +1000 | [diff] [blame] | 11 | struct iomap_ops; |
David Howells | a6f76f2 | 2008-11-14 10:39:24 +1100 | [diff] [blame] | 12 | struct linux_binprm; |
Al Viro | 3e93cd6 | 2009-03-29 19:00:13 -0400 | [diff] [blame] | 13 | struct path; |
Al Viro | c710536 | 2011-11-24 18:22:03 -0500 | [diff] [blame] | 14 | struct mount; |
Vladimir Davydov | 503c358 | 2015-02-12 14:58:47 -0800 | [diff] [blame] | 15 | struct shrink_control; |
David Howells | 9bc61ab | 2018-11-04 03:19:03 -0500 | [diff] [blame] | 16 | struct fs_context; |
Al Viro | b964bf5 | 2021-01-25 22:24:28 -0500 | [diff] [blame] | 17 | struct pipe_inode_info; |
Al Viro | 06bbaa6 | 2022-09-26 11:59:14 -0400 | [diff] [blame] | 18 | struct iov_iter; |
Christian Brauner | 3707d84 | 2023-01-13 12:49:33 +0100 | [diff] [blame] | 19 | struct mnt_idmap; |
Christian Brauner | 460695a | 2024-06-27 16:11:41 +0200 | [diff] [blame] | 20 | struct ns_common; |
Andrew Morton | 5e6d12b | 2006-08-31 12:55:23 +0200 | [diff] [blame] | 21 | |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 22 | /* |
Christoph Hellwig | 0dca446 | 2021-09-07 16:13:03 +0200 | [diff] [blame] | 23 | * block/bdev.c |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 24 | */ |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 25 | #ifdef CONFIG_BLOCK |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 26 | extern void __init bdev_cache_init(void); |
Andrew Morton | 5e6d12b | 2006-08-31 12:55:23 +0200 | [diff] [blame] | 27 | #else |
| 28 | static inline void bdev_cache_init(void) |
| 29 | { |
| 30 | } |
Christoph Hellwig | 3f1266f | 2020-06-20 09:16:41 +0200 | [diff] [blame] | 31 | #endif /* CONFIG_BLOCK */ |
David Howells | 7b0de42d | 2006-08-29 19:06:07 +0100 | [diff] [blame] | 32 | |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 33 | /* |
Akinobu Mita | 4db96b7 | 2014-10-09 15:26:55 -0700 | [diff] [blame] | 34 | * buffer.c |
| 35 | */ |
Matthew Wilcox (Oracle) | d1bd0b4 | 2021-11-03 14:05:47 -0400 | [diff] [blame] | 36 | int __block_write_begin_int(struct folio *folio, loff_t pos, unsigned len, |
Christoph Hellwig | 6d49cc8 | 2021-08-10 18:33:05 -0700 | [diff] [blame] | 37 | get_block_t *get_block, const struct iomap *iomap); |
Akinobu Mita | 4db96b7 | 2014-10-09 15:26:55 -0700 | [diff] [blame] | 38 | |
| 39 | /* |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 40 | * char_dev.c |
| 41 | */ |
| 42 | extern void __init chrdev_init(void); |
| 43 | |
| 44 | /* |
David Howells | 9bc61ab | 2018-11-04 03:19:03 -0500 | [diff] [blame] | 45 | * fs_context.c |
| 46 | */ |
David Howells | ecdab150 | 2018-11-01 23:36:09 +0000 | [diff] [blame] | 47 | extern const struct fs_context_operations legacy_fs_context_ops; |
David Howells | 9bc61ab | 2018-11-04 03:19:03 -0500 | [diff] [blame] | 48 | extern int parse_monolithic_mount_data(struct fs_context *, void *); |
David Howells | ecdab150 | 2018-11-01 23:36:09 +0000 | [diff] [blame] | 49 | extern void vfs_clean_context(struct fs_context *fc); |
| 50 | extern int finish_clean_context(struct fs_context *fc); |
David Howells | 9bc61ab | 2018-11-04 03:19:03 -0500 | [diff] [blame] | 51 | |
| 52 | /* |
David Howells | 0bdaea9 | 2012-06-25 12:55:46 +0100 | [diff] [blame] | 53 | * namei.c |
| 54 | */ |
David Howells | 31d921c | 2018-11-01 23:07:24 +0000 | [diff] [blame] | 55 | extern int filename_lookup(int dfd, struct filename *name, unsigned flags, |
| 56 | struct path *path, struct path *root); |
Dmitry Kadashev | 45f30da | 2021-07-08 13:34:44 +0700 | [diff] [blame] | 57 | int do_rmdir(int dfd, struct filename *name); |
| 58 | int do_unlinkat(int dfd, struct filename *name); |
Christian Brauner | 4609e1f | 2023-01-13 12:49:22 +0100 | [diff] [blame] | 59 | int may_linkat(struct mnt_idmap *idmap, const struct path *link); |
Jens Axboe | e886663 | 2020-09-26 17:20:17 -0600 | [diff] [blame] | 60 | int do_renameat2(int olddfd, struct filename *oldname, int newdfd, |
| 61 | struct filename *newname, unsigned int flags); |
Dmitry Kadashev | 45f30da | 2021-07-08 13:34:44 +0700 | [diff] [blame] | 62 | int do_mkdirat(int dfd, struct filename *name, umode_t mode); |
Dmitry Kadashev | 7a8721f | 2021-07-08 13:34:46 +0700 | [diff] [blame] | 63 | int do_symlinkat(struct filename *from, int newdfd, struct filename *to); |
Dmitry Kadashev | cf30da9 | 2021-07-08 13:34:47 +0700 | [diff] [blame] | 64 | int do_linkat(int olddfd, struct filename *old, int newdfd, |
| 65 | struct filename *new, int flags); |
Miklos Szeredi | 9a87907 | 2024-05-02 20:35:57 +0200 | [diff] [blame] | 66 | int vfs_tmpfile(struct mnt_idmap *idmap, |
| 67 | const struct path *parentpath, |
| 68 | struct file *file, umode_t mode); |
David Howells | 0bdaea9 | 2012-06-25 12:55:46 +0100 | [diff] [blame] | 69 | |
| 70 | /* |
David Howells | 07f3f05 | 2006-09-30 20:52:18 +0200 | [diff] [blame] | 71 | * namespace.c |
| 72 | */ |
Al Viro | ca71cf7 | 2016-11-20 19:45:28 -0500 | [diff] [blame] | 73 | extern struct vfsmount *lookup_mnt(const struct path *); |
Al Viro | 1e2d8464 | 2021-06-18 20:27:57 -0400 | [diff] [blame] | 74 | extern int finish_automount(struct vfsmount *, const struct path *); |
Al Viro | 6d59e7f | 2008-03-22 15:48:17 -0400 | [diff] [blame] | 75 | |
Miklos Szeredi | 4ed5e82f | 2011-11-21 12:11:31 +0100 | [diff] [blame] | 76 | extern int sb_prepare_remount_readonly(struct super_block *); |
Al Viro | f03c659 | 2011-01-14 22:30:21 -0500 | [diff] [blame] | 77 | |
Al Viro | 6d59e7f | 2008-03-22 15:48:17 -0400 | [diff] [blame] | 78 | extern void __init mnt_init(void); |
Al Viro | 3e93cd6 | 2009-03-29 19:00:13 -0400 | [diff] [blame] | 79 | |
Amir Goldstein | 3e15dcf | 2023-09-08 16:28:59 +0300 | [diff] [blame] | 80 | int mnt_get_write_access_file(struct file *file); |
| 81 | void mnt_put_write_access_file(struct file *file); |
Al Viro | 47cd813f | 2010-02-05 02:01:14 -0500 | [diff] [blame] | 82 | |
Al Viro | a07b200 | 2018-11-05 17:40:30 +0000 | [diff] [blame] | 83 | extern void dissolve_on_fput(struct vfsmount *); |
Al Viro | a5f85d7 | 2022-03-01 00:05:29 -0500 | [diff] [blame] | 84 | extern bool may_mount(void); |
Christoph Hellwig | c60166f | 2020-07-21 11:12:08 +0200 | [diff] [blame] | 85 | |
| 86 | int path_mount(const char *dev_name, struct path *path, |
| 87 | const char *type_page, unsigned long flags, void *data_page); |
Christoph Hellwig | 09267de | 2020-07-23 08:23:08 +0200 | [diff] [blame] | 88 | int path_umount(struct path *path, int flags); |
Christoph Hellwig | c60166f | 2020-07-21 11:12:08 +0200 | [diff] [blame] | 89 | |
Miklos Szeredi | 56c94c6 | 2023-10-25 16:02:01 +0200 | [diff] [blame] | 90 | int show_path(struct seq_file *m, struct dentry *root); |
| 91 | |
Al Viro | 3e93cd6 | 2009-03-29 19:00:13 -0400 | [diff] [blame] | 92 | /* |
| 93 | * fs_struct.c |
| 94 | */ |
Al Viro | dcf787f | 2013-03-01 23:51:07 -0500 | [diff] [blame] | 95 | extern void chroot_fs_refs(const struct path *, const struct path *); |
npiggin@suse.de | 864d7c4 | 2009-04-26 20:25:56 +1000 | [diff] [blame] | 96 | |
| 97 | /* |
| 98 | * file_table.c |
| 99 | */ |
Amir Goldstein | 62d53c4 | 2023-06-15 14:22:28 +0300 | [diff] [blame] | 100 | struct file *alloc_empty_file(int flags, const struct cred *cred); |
| 101 | struct file *alloc_empty_file_noaccount(int flags, const struct cred *cred); |
| 102 | struct file *alloc_empty_backing_file(int flags, const struct cred *cred); |
Al Viro | 62c6943 | 2009-05-07 03:12:29 -0400 | [diff] [blame] | 103 | |
Amir Goldstein | 83bc1d2 | 2023-10-09 18:37:10 +0300 | [diff] [blame] | 104 | static inline void file_put_write_access(struct file *file) |
| 105 | { |
| 106 | put_write_access(file->f_inode); |
| 107 | mnt_put_write_access(file->f_path.mnt); |
| 108 | if (unlikely(file->f_mode & FMODE_BACKING)) |
Amir Goldstein | def3ae8 | 2023-10-09 18:37:12 +0300 | [diff] [blame] | 109 | mnt_put_write_access(backing_file_user_path(file)->mnt); |
Amir Goldstein | 83bc1d2 | 2023-10-09 18:37:10 +0300 | [diff] [blame] | 110 | } |
| 111 | |
Amir Goldstein | d6da19c | 2022-08-16 17:53:17 +0300 | [diff] [blame] | 112 | static inline void put_file_access(struct file *file) |
| 113 | { |
| 114 | if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) { |
| 115 | i_readcount_dec(file->f_inode); |
| 116 | } else if (file->f_mode & FMODE_WRITER) { |
Amir Goldstein | 83bc1d2 | 2023-10-09 18:37:10 +0300 | [diff] [blame] | 117 | file_put_write_access(file); |
Amir Goldstein | d6da19c | 2022-08-16 17:53:17 +0300 | [diff] [blame] | 118 | } |
| 119 | } |
| 120 | |
Al Viro | 62c6943 | 2009-05-07 03:12:29 -0400 | [diff] [blame] | 121 | /* |
| 122 | * super.c |
| 123 | */ |
David Howells | 8d0347f | 2018-11-04 09:28:36 -0500 | [diff] [blame] | 124 | extern int reconfigure_super(struct fs_context *); |
Christian Brauner | d8ce82e | 2023-08-18 16:00:49 +0200 | [diff] [blame] | 125 | extern bool super_trylock_shared(struct super_block *sb); |
Christoph Hellwig | 4e7b567 | 2020-11-23 13:38:40 +0100 | [diff] [blame] | 126 | struct super_block *user_get_super(dev_t, bool excl); |
Christoph Hellwig | 60b4988 | 2020-11-16 15:21:18 +0100 | [diff] [blame] | 127 | void put_super(struct super_block *sb); |
Al Viro | 20284ab | 2019-05-12 17:31:45 -0400 | [diff] [blame] | 128 | extern bool mount_capable(struct fs_context *); |
Christoph Hellwig | 439bc39 | 2023-01-25 07:58:38 +0100 | [diff] [blame] | 129 | int sb_init_dio_done_wq(struct super_block *sb); |
Al Viro | 482928d | 2009-12-19 10:10:39 -0500 | [diff] [blame] | 130 | |
| 131 | /* |
Jan Kara | d7439fb | 2023-06-20 13:28:32 +0200 | [diff] [blame] | 132 | * Prepare superblock for changing its read-only state (i.e., either remount |
| 133 | * read-write superblock read-only or vice versa). After this function returns |
| 134 | * mnt_is_readonly() will return true for any mount of the superblock if its |
| 135 | * caller is able to observe any changes done by the remount. This holds until |
| 136 | * sb_end_ro_state_change() is called. |
| 137 | */ |
| 138 | static inline void sb_start_ro_state_change(struct super_block *sb) |
| 139 | { |
| 140 | WRITE_ONCE(sb->s_readonly_remount, 1); |
| 141 | /* |
| 142 | * For RO->RW transition, the barrier pairs with the barrier in |
| 143 | * mnt_is_readonly() making sure if mnt_is_readonly() sees SB_RDONLY |
| 144 | * cleared, it will see s_readonly_remount set. |
| 145 | * For RW->RO transition, the barrier pairs with the barrier in |
Amir Goldstein | 3e15dcf | 2023-09-08 16:28:59 +0300 | [diff] [blame] | 146 | * mnt_get_write_access() before the mnt_is_readonly() check. |
| 147 | * The barrier makes sure if mnt_get_write_access() sees MNT_WRITE_HOLD |
| 148 | * already cleared, it will see s_readonly_remount set. |
Jan Kara | d7439fb | 2023-06-20 13:28:32 +0200 | [diff] [blame] | 149 | */ |
| 150 | smp_wmb(); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Ends section changing read-only state of the superblock. After this function |
| 155 | * returns if mnt_is_readonly() returns false, the caller will be able to |
| 156 | * observe all the changes remount did to the superblock. |
| 157 | */ |
| 158 | static inline void sb_end_ro_state_change(struct super_block *sb) |
| 159 | { |
| 160 | /* |
| 161 | * This barrier provides release semantics that pairs with |
| 162 | * the smp_rmb() acquire semantics in mnt_is_readonly(). |
| 163 | * This barrier pair ensure that when mnt_is_readonly() sees |
| 164 | * 0 for sb->s_readonly_remount, it will also see all the |
| 165 | * preceding flag changes that were made during the RO state |
| 166 | * change. |
| 167 | */ |
| 168 | smp_wmb(); |
| 169 | WRITE_ONCE(sb->s_readonly_remount, 0); |
| 170 | } |
| 171 | |
| 172 | /* |
Al Viro | 482928d | 2009-12-19 10:10:39 -0500 | [diff] [blame] | 173 | * open.c |
| 174 | */ |
Al Viro | 47c805d | 2011-02-23 17:44:09 -0500 | [diff] [blame] | 175 | struct open_flags { |
| 176 | int open_flag; |
Al Viro | a218d0f | 2011-11-21 14:59:34 -0500 | [diff] [blame] | 177 | umode_t mode; |
Al Viro | 47c805d | 2011-02-23 17:44:09 -0500 | [diff] [blame] | 178 | int acc_mode; |
| 179 | int intent; |
Al Viro | f9652e1 | 2013-06-11 08:23:01 +0400 | [diff] [blame] | 180 | int lookup_flags; |
Al Viro | 47c805d | 2011-02-23 17:44:09 -0500 | [diff] [blame] | 181 | }; |
Jeff Layton | 669abf4 | 2012-10-10 16:43:10 -0400 | [diff] [blame] | 182 | extern struct file *do_filp_open(int dfd, struct filename *pathname, |
Al Viro | f9652e1 | 2013-06-11 08:23:01 +0400 | [diff] [blame] | 183 | const struct open_flags *op); |
Al Viro | ffb37ca | 2021-04-01 19:00:57 -0400 | [diff] [blame] | 184 | extern struct file *do_file_open_root(const struct path *, |
Al Viro | f9652e1 | 2013-06-11 08:23:01 +0400 | [diff] [blame] | 185 | const char *, const struct open_flags *); |
Jens Axboe | 35cb6d5 | 2019-12-13 11:10:11 -0700 | [diff] [blame] | 186 | extern struct open_how build_open_how(int flags, umode_t mode); |
| 187 | extern int build_open_flags(const struct open_how *how, struct open_flags *op); |
Christian Brauner | 24fa3ae | 2023-11-30 13:49:08 +0100 | [diff] [blame] | 188 | struct file *file_close_fd_locked(struct files_struct *files, unsigned fd); |
Al Viro | a8dade3 | 2010-10-24 11:13:10 -0400 | [diff] [blame] | 189 | |
Tony Solomonik | 5f0d594 | 2024-02-02 14:17:23 +0200 | [diff] [blame] | 190 | long do_ftruncate(struct file *file, loff_t length, int small); |
Dominik Brodowski | 411d947 | 2018-03-11 11:34:54 +0100 | [diff] [blame] | 191 | long do_sys_ftruncate(unsigned int fd, loff_t length, int small); |
Christoph Hellwig | 1097742 | 2020-07-22 11:41:02 +0200 | [diff] [blame] | 192 | int chmod_common(const struct path *path, umode_t mode); |
Dominik Brodowski | 55731b3 | 2018-03-11 11:34:55 +0100 | [diff] [blame] | 193 | int do_fchownat(int dfd, const char __user *filename, uid_t user, gid_t group, |
| 194 | int flag); |
Christoph Hellwig | b873498 | 2020-07-22 11:13:26 +0200 | [diff] [blame] | 195 | int chown_common(const struct path *path, uid_t user, gid_t group); |
Al Viro | ae2bb29 | 2018-07-10 13:22:28 -0400 | [diff] [blame] | 196 | extern int vfs_open(const struct path *, struct file *); |
Aneesh Kumar K.V | becfd1f | 2011-01-29 18:43:26 +0530 | [diff] [blame] | 197 | |
Al Viro | a8dade3 | 2010-10-24 11:13:10 -0400 | [diff] [blame] | 198 | /* |
| 199 | * inode.c |
| 200 | */ |
Vladimir Davydov | 503c358 | 2015-02-12 14:58:47 -0800 | [diff] [blame] | 201 | extern long prune_icache_sb(struct super_block *sb, struct shrink_control *sc); |
Christian Brauner | 9452e93 | 2023-01-13 12:49:27 +0100 | [diff] [blame] | 202 | int dentry_needs_remove_privs(struct mnt_idmap *, struct dentry *dentry); |
| 203 | bool in_group_or_capable(struct mnt_idmap *idmap, |
Christian Brauner | 11c2a87 | 2022-10-17 17:06:34 +0200 | [diff] [blame] | 204 | const struct inode *inode, vfsgid_t vfsgid); |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 205 | |
Dave Chinner | a66979a | 2011-03-22 22:23:41 +1100 | [diff] [blame] | 206 | /* |
| 207 | * fs-writeback.c |
| 208 | */ |
Glauber Costa | 3942c07 | 2013-08-28 10:17:53 +1000 | [diff] [blame] | 209 | extern long get_nr_dirty_inodes(void); |
Christoph Hellwig | e127b9b | 2023-08-11 12:08:28 +0200 | [diff] [blame] | 210 | void invalidate_inodes(struct super_block *sb); |
Al Viro | a4464db | 2011-07-07 15:03:58 -0400 | [diff] [blame] | 211 | |
| 212 | /* |
| 213 | * dcache.c |
| 214 | */ |
Miklos Szeredi | eed8100 | 2013-09-05 14:39:11 +0200 | [diff] [blame] | 215 | extern int d_set_mounted(struct dentry *dentry); |
Vladimir Davydov | 503c358 | 2015-02-12 14:58:47 -0800 | [diff] [blame] | 216 | extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc); |
Al Viro | ba65dc5 | 2016-06-10 11:32:47 -0400 | [diff] [blame] | 217 | extern struct dentry *d_alloc_cursor(struct dentry *); |
Al Viro | ab1152d | 2019-03-15 22:58:11 -0400 | [diff] [blame] | 218 | extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *); |
Al Viro | 7e5f7bb | 2019-05-20 13:44:57 +0100 | [diff] [blame] | 219 | extern char *simple_dname(struct dentry *, char *, int); |
Al Viro | 9bdebc2 | 2019-06-29 18:31:24 -0400 | [diff] [blame] | 220 | extern void dput_to_list(struct dentry *, struct list_head *); |
| 221 | extern void shrink_dentry_list(struct list_head *); |
Al Viro | 0d48651 | 2023-11-10 15:22:40 -0500 | [diff] [blame] | 222 | extern void shrink_dcache_for_umount(struct super_block *); |
| 223 | extern struct dentry *__d_lookup(const struct dentry *, const struct qstr *); |
| 224 | extern struct dentry *__d_lookup_rcu(const struct dentry *parent, |
| 225 | const struct qstr *name, unsigned *seq); |
Al Viro | 8a54b38 | 2023-11-11 16:01:27 -0500 | [diff] [blame] | 226 | extern void d_genocide(struct dentry *); |
Al Viro | 06ae43f3 | 2013-03-20 13:19:30 -0400 | [diff] [blame] | 227 | |
| 228 | /* |
Al Viro | 599a0ac | 2013-03-12 09:58:10 -0400 | [diff] [blame] | 229 | * pipe.c |
| 230 | */ |
| 231 | extern const struct file_operations pipefifo_fops; |
Al Viro | 8fa1f1c | 2014-05-21 18:22:52 -0400 | [diff] [blame] | 232 | |
| 233 | /* |
| 234 | * fs_pin.c |
| 235 | */ |
Al Viro | fdab684 | 2015-01-11 10:57:27 -0500 | [diff] [blame] | 236 | extern void group_pin_kill(struct hlist_head *p); |
Al Viro | 8fa1f1c | 2014-05-21 18:22:52 -0400 | [diff] [blame] | 237 | extern void mnt_pin_kill(struct mount *m); |
Al Viro | e149ed2 | 2014-11-01 10:57:28 -0400 | [diff] [blame] | 238 | |
| 239 | /* |
| 240 | * fs/nsfs.c |
| 241 | */ |
Rasmus Villemoes | be218aa | 2016-09-15 00:15:34 +0200 | [diff] [blame] | 242 | extern const struct dentry_operations ns_dentry_operations; |
Linus Torvalds | 98f3a9a | 2024-07-15 12:34:01 -0700 | [diff] [blame] | 243 | int open_namespace(struct ns_common *ns); |
Al Viro | 66cf191 | 2016-01-07 09:53:30 -0500 | [diff] [blame] | 244 | |
Jens Axboe | 3934e36 | 2019-12-14 13:26:33 -0700 | [diff] [blame] | 245 | /* |
| 246 | * fs/stat.c: |
| 247 | */ |
Stefan Roesch | 1b6fe6e | 2022-02-25 10:53:26 -0800 | [diff] [blame] | 248 | |
| 249 | int getname_statx_lookup_flags(int flags); |
| 250 | int do_statx(int dfd, struct filename *filename, unsigned int flags, |
Bijan Mottahedeh | 0018784 | 2020-05-22 21:31:17 -0700 | [diff] [blame] | 251 | unsigned int mask, struct statx __user *buffer); |
Mateusz Guzik | 0ef625b | 2024-06-25 17:18:06 +0200 | [diff] [blame] | 252 | int do_statx_fd(int fd, unsigned int flags, unsigned int mask, |
| 253 | struct statx __user *buffer); |
Al Viro | b964bf5 | 2021-01-25 22:24:28 -0500 | [diff] [blame] | 254 | |
| 255 | /* |
| 256 | * fs/splice.c: |
| 257 | */ |
Amir Goldstein | 0f29208 | 2023-12-12 11:44:36 +0200 | [diff] [blame] | 258 | ssize_t splice_file_to_pipe(struct file *in, |
| 259 | struct pipe_inode_info *opipe, |
| 260 | loff_t *offset, |
| 261 | size_t len, unsigned int flags); |
Stefan Roesch | 1a91794 | 2022-04-24 18:10:46 -0600 | [diff] [blame] | 262 | |
| 263 | /* |
| 264 | * fs/xattr.c: |
| 265 | */ |
| 266 | struct xattr_name { |
| 267 | char name[XATTR_NAME_MAX + 1]; |
| 268 | }; |
| 269 | |
| 270 | struct xattr_ctx { |
| 271 | /* Value of attribute */ |
| 272 | union { |
| 273 | const void __user *cvalue; |
| 274 | void __user *value; |
| 275 | }; |
| 276 | void *kvalue; |
| 277 | size_t size; |
| 278 | /* Attribute name */ |
| 279 | struct xattr_name *kname; |
| 280 | unsigned int flags; |
| 281 | }; |
| 282 | |
Stefan Roesch | c975cad | 2022-04-24 18:13:50 -0600 | [diff] [blame] | 283 | |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 284 | ssize_t do_getxattr(struct mnt_idmap *idmap, |
Stefan Roesch | c975cad | 2022-04-24 18:13:50 -0600 | [diff] [blame] | 285 | struct dentry *d, |
| 286 | struct xattr_ctx *ctx); |
| 287 | |
Stefan Roesch | 1a91794 | 2022-04-24 18:10:46 -0600 | [diff] [blame] | 288 | int setxattr_copy(const char __user *name, struct xattr_ctx *ctx); |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 289 | int do_setxattr(struct mnt_idmap *idmap, struct dentry *dentry, |
Stefan Roesch | 1a91794 | 2022-04-24 18:10:46 -0600 | [diff] [blame] | 290 | struct xattr_ctx *ctx); |
Christian Brauner | 4609e1f | 2023-01-13 12:49:22 +0100 | [diff] [blame] | 291 | int may_write_xattr(struct mnt_idmap *idmap, struct inode *inode); |
Al Viro | 06bbaa6 | 2022-09-26 11:59:14 -0400 | [diff] [blame] | 292 | |
Christian Brauner | 318e668 | 2022-09-22 17:17:22 +0200 | [diff] [blame] | 293 | #ifdef CONFIG_FS_POSIX_ACL |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 294 | int do_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
Christian Brauner | 318e668 | 2022-09-22 17:17:22 +0200 | [diff] [blame] | 295 | const char *acl_name, const void *kvalue, size_t size); |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 296 | ssize_t do_get_acl(struct mnt_idmap *idmap, struct dentry *dentry, |
Christian Brauner | 318e668 | 2022-09-22 17:17:22 +0200 | [diff] [blame] | 297 | const char *acl_name, void *kvalue, size_t size); |
| 298 | #else |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 299 | static inline int do_set_acl(struct mnt_idmap *idmap, |
Christian Brauner | 318e668 | 2022-09-22 17:17:22 +0200 | [diff] [blame] | 300 | struct dentry *dentry, const char *acl_name, |
| 301 | const void *kvalue, size_t size) |
| 302 | { |
| 303 | return -EOPNOTSUPP; |
| 304 | } |
Christian Brauner | 5a6f52d | 2022-10-28 09:56:20 +0200 | [diff] [blame] | 305 | static inline ssize_t do_get_acl(struct mnt_idmap *idmap, |
Christian Brauner | 318e668 | 2022-09-22 17:17:22 +0200 | [diff] [blame] | 306 | struct dentry *dentry, const char *acl_name, |
| 307 | void *kvalue, size_t size) |
| 308 | { |
| 309 | return -EOPNOTSUPP; |
| 310 | } |
| 311 | #endif |
Al Viro | 06bbaa6 | 2022-09-26 11:59:14 -0400 | [diff] [blame] | 312 | |
| 313 | ssize_t __kernel_write_iter(struct file *file, struct iov_iter *from, loff_t *pos); |
Christian Brauner | 72ae017 | 2022-10-17 17:06:36 +0200 | [diff] [blame] | 314 | |
| 315 | /* |
| 316 | * fs/attr.c |
| 317 | */ |
Christian Brauner | 3707d84 | 2023-01-13 12:49:33 +0100 | [diff] [blame] | 318 | struct mnt_idmap *alloc_mnt_idmap(struct user_namespace *mnt_userns); |
| 319 | struct mnt_idmap *mnt_idmap_get(struct mnt_idmap *idmap); |
| 320 | void mnt_idmap_put(struct mnt_idmap *idmap); |
Christian Brauner | e9c5263 | 2024-03-01 10:26:03 +0100 | [diff] [blame] | 321 | struct stashed_operations { |
| 322 | void (*put_data)(void *data); |
Christian Brauner | 9d9539d | 2024-03-12 10:39:44 +0100 | [diff] [blame] | 323 | int (*init_inode)(struct inode *inode, void *data); |
Christian Brauner | e9c5263 | 2024-03-01 10:26:03 +0100 | [diff] [blame] | 324 | }; |
Christian Brauner | 9d9539d | 2024-03-12 10:39:44 +0100 | [diff] [blame] | 325 | int path_from_stashed(struct dentry **stashed, struct vfsmount *mnt, void *data, |
| 326 | struct path *path); |
Christian Brauner | 2558e3b | 2024-02-21 09:59:51 +0100 | [diff] [blame] | 327 | void stashed_dentry_prune(struct dentry *dentry); |
Mateusz Guzik | 0ef625b | 2024-06-25 17:18:06 +0200 | [diff] [blame] | 328 | /** |
| 329 | * path_mounted - check whether path is mounted |
| 330 | * @path: path to check |
| 331 | * |
| 332 | * Determine whether @path refers to the root of a mount. |
| 333 | * |
| 334 | * Return: true if @path is the root of a mount, false if not. |
| 335 | */ |
| 336 | static inline bool path_mounted(const struct path *path) |
| 337 | { |
| 338 | return path->mnt->mnt_root == path->dentry; |
| 339 | } |