Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2, or (at your option) |
| 7 | * any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; see the file COPYING. If not, write to |
| 16 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 17 | */ |
| 18 | |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 19 | #include <linux/fs.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/mutex.h> |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 24 | #include <linux/spinlock.h> |
| 25 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 26 | #include <linux/atomic.h> |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 27 | |
| 28 | #include <linux/fsnotify_backend.h> |
| 29 | #include "fsnotify.h" |
| 30 | |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 31 | #include "../internal.h" |
| 32 | |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 33 | /* |
| 34 | * Recalculate the mask of events relevant to a given inode locked. |
| 35 | */ |
| 36 | static void fsnotify_recalc_inode_mask_locked(struct inode *inode) |
| 37 | { |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 38 | struct fsnotify_mark *mark; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 39 | struct hlist_node *pos; |
| 40 | __u32 new_mask = 0; |
| 41 | |
| 42 | assert_spin_locked(&inode->i_lock); |
| 43 | |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 44 | hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list) |
| 45 | new_mask |= mark->mask; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 46 | inode->i_fsnotify_mask = new_mask; |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * Recalculate the inode->i_fsnotify_mask, or the mask of all FS_* event types |
| 51 | * any notifier is interested in hearing for this inode. |
| 52 | */ |
| 53 | void fsnotify_recalc_inode_mask(struct inode *inode) |
| 54 | { |
| 55 | spin_lock(&inode->i_lock); |
| 56 | fsnotify_recalc_inode_mask_locked(inode); |
| 57 | spin_unlock(&inode->i_lock); |
Eric Paris | c28f7e5 | 2009-05-21 17:01:29 -0400 | [diff] [blame] | 58 | |
| 59 | __fsnotify_update_child_dentry_flags(inode); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 60 | } |
| 61 | |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 62 | void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark) |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 63 | { |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 64 | struct inode *inode = mark->i.inode; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 65 | |
Lino Sanfilippo | 986ab09 | 2011-06-14 17:29:50 +0200 | [diff] [blame] | 66 | BUG_ON(!mutex_is_locked(&mark->group->mark_mutex)); |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 67 | assert_spin_locked(&mark->lock); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 68 | |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 69 | spin_lock(&inode->i_lock); |
| 70 | |
Eric Paris | a4c6e99 | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 71 | hlist_del_init_rcu(&mark->i.i_list); |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 72 | mark->i.inode = NULL; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 73 | |
| 74 | /* |
Eric Paris | e61ce86 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 75 | * this mark is now off the inode->i_fsnotify_marks list and we |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 76 | * hold the inode->i_lock, so this is the perfect time to update the |
| 77 | * inode->i_fsnotify_mask |
| 78 | */ |
| 79 | fsnotify_recalc_inode_mask_locked(inode); |
| 80 | |
| 81 | spin_unlock(&inode->i_lock); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Given an inode, destroy all of the marks associated with that inode. |
| 86 | */ |
| 87 | void fsnotify_clear_marks_by_inode(struct inode *inode) |
| 88 | { |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 89 | struct fsnotify_mark *mark, *lmark; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 90 | struct hlist_node *pos, *n; |
| 91 | LIST_HEAD(free_list); |
| 92 | |
| 93 | spin_lock(&inode->i_lock); |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 94 | hlist_for_each_entry_safe(mark, pos, n, &inode->i_fsnotify_marks, i.i_list) { |
| 95 | list_add(&mark->i.free_i_list, &free_list); |
Eric Paris | a4c6e99 | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 96 | hlist_del_init_rcu(&mark->i.i_list); |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 97 | fsnotify_get_mark(mark); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 98 | } |
| 99 | spin_unlock(&inode->i_lock); |
| 100 | |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 101 | list_for_each_entry_safe(mark, lmark, &free_list, i.free_i_list) { |
Lino Sanfilippo | e2a2994 | 2011-06-14 17:29:51 +0200 | [diff] [blame] | 102 | struct fsnotify_group *group; |
| 103 | |
| 104 | spin_lock(&mark->lock); |
| 105 | fsnotify_get_group(mark->group); |
| 106 | group = mark->group; |
| 107 | spin_unlock(&mark->lock); |
| 108 | |
| 109 | fsnotify_destroy_mark(mark, group); |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 110 | fsnotify_put_mark(mark); |
Lino Sanfilippo | e2a2994 | 2011-06-14 17:29:51 +0200 | [diff] [blame] | 111 | fsnotify_put_group(group); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 112 | } |
| 113 | } |
| 114 | |
| 115 | /* |
Eric Paris | 4d92604 | 2009-12-17 21:24:34 -0500 | [diff] [blame] | 116 | * Given a group clear all of the inode marks associated with that group. |
| 117 | */ |
| 118 | void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group) |
| 119 | { |
| 120 | fsnotify_clear_marks_by_group_flags(group, FSNOTIFY_MARK_FLAG_INODE); |
| 121 | } |
| 122 | |
| 123 | /* |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 124 | * given a group and inode, find the mark associated with that combination. |
| 125 | * if found take a reference to that mark and return it, else return NULL |
| 126 | */ |
Tushar Behera | ac5f121 | 2012-12-17 15:59:40 -0800 | [diff] [blame] | 127 | static struct fsnotify_mark *fsnotify_find_inode_mark_locked( |
| 128 | struct fsnotify_group *group, |
| 129 | struct inode *inode) |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 130 | { |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 131 | struct fsnotify_mark *mark; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 132 | struct hlist_node *pos; |
| 133 | |
| 134 | assert_spin_locked(&inode->i_lock); |
| 135 | |
Eric Paris | 841bdc1 | 2009-12-17 21:24:24 -0500 | [diff] [blame] | 136 | hlist_for_each_entry(mark, pos, &inode->i_fsnotify_marks, i.i_list) { |
| 137 | if (mark->group == group) { |
| 138 | fsnotify_get_mark(mark); |
| 139 | return mark; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 140 | } |
| 141 | } |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | /* |
Andreas Gruenbacher | 3556608 | 2009-12-17 21:24:25 -0500 | [diff] [blame] | 146 | * given a group and inode, find the mark associated with that combination. |
| 147 | * if found take a reference to that mark and return it, else return NULL |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 148 | */ |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 149 | struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group, |
| 150 | struct inode *inode) |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 151 | { |
Andreas Gruenbacher | 3556608 | 2009-12-17 21:24:25 -0500 | [diff] [blame] | 152 | struct fsnotify_mark *mark; |
| 153 | |
| 154 | spin_lock(&inode->i_lock); |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 155 | mark = fsnotify_find_inode_mark_locked(group, inode); |
Andreas Gruenbacher | 3556608 | 2009-12-17 21:24:25 -0500 | [diff] [blame] | 156 | spin_unlock(&inode->i_lock); |
| 157 | |
| 158 | return mark; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 159 | } |
| 160 | |
| 161 | /* |
Eric Paris | 90b1e7a | 2009-12-17 21:24:33 -0500 | [diff] [blame] | 162 | * If we are setting a mark mask on an inode mark we should pin the inode |
| 163 | * in memory. |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 164 | */ |
Eric Paris | 90b1e7a | 2009-12-17 21:24:33 -0500 | [diff] [blame] | 165 | void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *mark, |
| 166 | __u32 mask) |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 167 | { |
Eric Paris | 90b1e7a | 2009-12-17 21:24:33 -0500 | [diff] [blame] | 168 | struct inode *inode; |
| 169 | |
| 170 | assert_spin_locked(&mark->lock); |
| 171 | |
| 172 | if (mask && |
| 173 | mark->i.inode && |
| 174 | !(mark->flags & FSNOTIFY_MARK_FLAG_OBJECT_PINNED)) { |
| 175 | mark->flags |= FSNOTIFY_MARK_FLAG_OBJECT_PINNED; |
| 176 | inode = igrab(mark->i.inode); |
| 177 | /* |
| 178 | * we shouldn't be able to get here if the inode wasn't |
| 179 | * already safely held in memory. But bug in case it |
| 180 | * ever is wrong. |
| 181 | */ |
| 182 | BUG_ON(!inode); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /* |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 187 | * Attach an initialized mark to a given inode. |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 188 | * These marks may be used for the fsnotify backend to determine which |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 189 | * event types should be delivered to which group and for which inodes. These |
Eric Paris | 6ad2d4e | 2010-10-28 17:21:56 -0400 | [diff] [blame] | 190 | * marks are ordered according to priority, highest number first, and then by |
| 191 | * the group's location in memory. |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 192 | */ |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 193 | int fsnotify_add_inode_mark(struct fsnotify_mark *mark, |
| 194 | struct fsnotify_group *group, struct inode *inode, |
| 195 | int allow_dups) |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 196 | { |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 197 | struct fsnotify_mark *lmark; |
| 198 | struct hlist_node *node, *last = NULL; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 199 | int ret = 0; |
| 200 | |
Eric Paris | 700307a | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 201 | mark->flags |= FSNOTIFY_MARK_FLAG_INODE; |
Eric Paris | 1ef5f13 | 2009-05-21 17:01:54 -0400 | [diff] [blame] | 202 | |
Lino Sanfilippo | 986ab09 | 2011-06-14 17:29:50 +0200 | [diff] [blame] | 203 | BUG_ON(!mutex_is_locked(&group->mark_mutex)); |
Eric Paris | 5444e29 | 2009-12-17 21:24:27 -0500 | [diff] [blame] | 204 | assert_spin_locked(&mark->lock); |
Eric Paris | 7131485 | 2009-12-17 21:24:23 -0500 | [diff] [blame] | 205 | |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 206 | spin_lock(&inode->i_lock); |
| 207 | |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 208 | mark->i.inode = inode; |
Eric Paris | 9f0d793 | 2009-09-11 13:03:19 -0400 | [diff] [blame] | 209 | |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 210 | /* is mark the first mark? */ |
| 211 | if (hlist_empty(&inode->i_fsnotify_marks)) { |
Eric Paris | a4c6e99 | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 212 | hlist_add_head_rcu(&mark->i.i_list, &inode->i_fsnotify_marks); |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 213 | goto out; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 214 | } |
| 215 | |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 216 | /* should mark be in the middle of the current list? */ |
| 217 | hlist_for_each_entry(lmark, node, &inode->i_fsnotify_marks, i.i_list) { |
| 218 | last = node; |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 219 | |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 220 | if ((lmark->group == group) && !allow_dups) { |
| 221 | ret = -EEXIST; |
| 222 | goto out; |
| 223 | } |
| 224 | |
Eric Paris | 6ad2d4e | 2010-10-28 17:21:56 -0400 | [diff] [blame] | 225 | if (mark->group->priority < lmark->group->priority) |
| 226 | continue; |
| 227 | |
| 228 | if ((mark->group->priority == lmark->group->priority) && |
| 229 | (mark->group < lmark->group)) |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 230 | continue; |
| 231 | |
Eric Paris | a4c6e99 | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 232 | hlist_add_before_rcu(&mark->i.i_list, &lmark->i.i_list); |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 233 | goto out; |
| 234 | } |
| 235 | |
| 236 | BUG_ON(last == NULL); |
| 237 | /* mark should be the last entry. last is the current last entry */ |
Eric Paris | a4c6e99 | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 238 | hlist_add_after_rcu(last, &mark->i.i_list); |
Eric Paris | 0c6532e | 2010-07-28 10:18:38 -0400 | [diff] [blame] | 239 | out: |
| 240 | fsnotify_recalc_inode_mask_locked(inode); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 241 | spin_unlock(&inode->i_lock); |
Eric Paris | 3be25f4 | 2009-05-21 17:01:26 -0400 | [diff] [blame] | 242 | |
| 243 | return ret; |
| 244 | } |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 245 | |
| 246 | /** |
| 247 | * fsnotify_unmount_inodes - an sb is unmounting. handle any watched inodes. |
| 248 | * @list: list of inodes being unmounted (sb->s_inodes) |
| 249 | * |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 250 | * Called during unmount with no locks held, so needs to be safe against |
| 251 | * concurrent modifiers. We temporarily drop inode_sb_list_lock and CAN block. |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 252 | */ |
| 253 | void fsnotify_unmount_inodes(struct list_head *list) |
| 254 | { |
| 255 | struct inode *inode, *next_i, *need_iput = NULL; |
| 256 | |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 257 | spin_lock(&inode_sb_list_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 258 | list_for_each_entry_safe(inode, next_i, list, i_sb_list) { |
| 259 | struct inode *need_iput_tmp; |
| 260 | |
| 261 | /* |
Al Viro | a4ffdde | 2010-06-02 17:38:30 -0400 | [diff] [blame] | 262 | * We cannot __iget() an inode in state I_FREEING, |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 263 | * I_WILL_FREE, or I_NEW which is fine because by that point |
| 264 | * the inode cannot have any associated watches. |
| 265 | */ |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 266 | spin_lock(&inode->i_lock); |
| 267 | if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) { |
| 268 | spin_unlock(&inode->i_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 269 | continue; |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 270 | } |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 271 | |
| 272 | /* |
| 273 | * If i_count is zero, the inode cannot have any watches and |
| 274 | * doing an __iget/iput with MS_ACTIVE clear would actually |
| 275 | * evict all inodes with zero i_count from icache which is |
| 276 | * unnecessarily violent and may in fact be illegal to do. |
| 277 | */ |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 278 | if (!atomic_read(&inode->i_count)) { |
| 279 | spin_unlock(&inode->i_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 280 | continue; |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 281 | } |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 282 | |
| 283 | need_iput_tmp = need_iput; |
| 284 | need_iput = NULL; |
| 285 | |
| 286 | /* In case fsnotify_inode_delete() drops a reference. */ |
| 287 | if (inode != need_iput_tmp) |
| 288 | __iget(inode); |
| 289 | else |
| 290 | need_iput_tmp = NULL; |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 291 | spin_unlock(&inode->i_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 292 | |
| 293 | /* In case the dropping of a reference would nuke next_i. */ |
| 294 | if ((&next_i->i_sb_list != list) && |
Dave Chinner | 250df6e | 2011-03-22 22:23:36 +1100 | [diff] [blame] | 295 | atomic_read(&next_i->i_count)) { |
| 296 | spin_lock(&next_i->i_lock); |
| 297 | if (!(next_i->i_state & (I_FREEING | I_WILL_FREE))) { |
| 298 | __iget(next_i); |
| 299 | need_iput = next_i; |
| 300 | } |
| 301 | spin_unlock(&next_i->i_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 302 | } |
| 303 | |
| 304 | /* |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 305 | * We can safely drop inode_sb_list_lock here because we hold |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 306 | * references on both inode and next_i. Also no new inodes |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 307 | * will be added since the umount has begun. |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 308 | */ |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 309 | spin_unlock(&inode_sb_list_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 310 | |
| 311 | if (need_iput_tmp) |
| 312 | iput(need_iput_tmp); |
| 313 | |
| 314 | /* for each watch, send FS_UNMOUNT and then remove it */ |
| 315 | fsnotify(inode, FS_UNMOUNT, inode, FSNOTIFY_EVENT_INODE, NULL, 0); |
| 316 | |
| 317 | fsnotify_inode_delete(inode); |
| 318 | |
| 319 | iput(inode); |
| 320 | |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 321 | spin_lock(&inode_sb_list_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 322 | } |
Dave Chinner | 55fa609 | 2011-03-22 22:23:40 +1100 | [diff] [blame] | 323 | spin_unlock(&inode_sb_list_lock); |
Eric Paris | 164bc61 | 2009-05-21 17:01:58 -0400 | [diff] [blame] | 324 | } |