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dkim=pass header.d=fujitsu.com header.s=170520fj header.b="wTun/xZB"; spf=pass (imf14.hostedemail.com: domain of ruansy.fnst@fujitsu.com designates 195.245.231.4 as permitted sender) smtp.mailfrom=ruansy.fnst@fujitsu.com; dmarc=pass (policy=none) header.from=fujitsu.com X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 1E9E110002B X-Stat-Signature: 6w7kprmos3w347rw9jzxr9n6zn6ufa33 X-HE-Tag: 1662114995-229286 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: xfs_notify_failure requires a method to invalidate all mappings. drop_pagecache_sb() can do this but it is a static function and only build with CONFIG_SYSCTL. Now, move it to super.c and make it available for others. Signed-off-by: Shiyang Ruan --- fs/drop_caches.c | 33 --------------------------------- fs/super.c | 34 ++++++++++++++++++++++++++++++++++ include/linux/fs.h | 1 + 3 files changed, 35 insertions(+), 33 deletions(-) diff --git a/fs/drop_caches.c b/fs/drop_caches.c index e619c31b6bd9..5c8406076f9b 100644 --- a/fs/drop_caches.c +++ b/fs/drop_caches.c @@ -3,7 +3,6 @@ * Implement the manual drop-all-pagecache function */ -#include #include #include #include @@ -15,38 +14,6 @@ /* A global variable is a bit ugly, but it keeps the code simple */ int sysctl_drop_caches; -static void drop_pagecache_sb(struct super_block *sb, void *unused) -{ - struct inode *inode, *toput_inode = NULL; - - spin_lock(&sb->s_inode_list_lock); - list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { - spin_lock(&inode->i_lock); - /* - * We must skip inodes in unusual state. We may also skip - * inodes without pages but we deliberately won't in case - * we need to reschedule to avoid softlockups. - */ - if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) || - (mapping_empty(inode->i_mapping) && !need_resched())) { - spin_unlock(&inode->i_lock); - continue; - } - __iget(inode); - spin_unlock(&inode->i_lock); - spin_unlock(&sb->s_inode_list_lock); - - invalidate_mapping_pages(inode->i_mapping, 0, -1); - iput(toput_inode); - toput_inode = inode; - - cond_resched(); - spin_lock(&sb->s_inode_list_lock); - } - spin_unlock(&sb->s_inode_list_lock); - iput(toput_inode); -} - int drop_caches_sysctl_handler(struct ctl_table *table, int write, void *buffer, size_t *length, loff_t *ppos) { diff --git a/fs/super.c b/fs/super.c index 734ed584a946..bdf53dbe834c 100644 --- a/fs/super.c +++ b/fs/super.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include "internal.h" @@ -677,6 +678,39 @@ void drop_super_exclusive(struct super_block *sb) } EXPORT_SYMBOL(drop_super_exclusive); +void drop_pagecache_sb(struct super_block *sb, void *unused) +{ + struct inode *inode, *toput_inode = NULL; + + spin_lock(&sb->s_inode_list_lock); + list_for_each_entry(inode, &sb->s_inodes, i_sb_list) { + spin_lock(&inode->i_lock); + /* + * We must skip inodes in unusual state. We may also skip + * inodes without pages but we deliberately won't in case + * we need to reschedule to avoid softlockups. + */ + if ((inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) || + (mapping_empty(inode->i_mapping) && !need_resched())) { + spin_unlock(&inode->i_lock); + continue; + } + __iget(inode); + spin_unlock(&inode->i_lock); + spin_unlock(&sb->s_inode_list_lock); + + invalidate_mapping_pages(inode->i_mapping, 0, -1); + iput(toput_inode); + toput_inode = inode; + + cond_resched(); + spin_lock(&sb->s_inode_list_lock); + } + spin_unlock(&sb->s_inode_list_lock); + iput(toput_inode); +} +EXPORT_SYMBOL(drop_pagecache_sb); + static void __iterate_supers(void (*f)(struct super_block *)) { struct super_block *sb, *p = NULL; diff --git a/include/linux/fs.h b/include/linux/fs.h index 9eced4cc286e..5ded28c0d2c9 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -3292,6 +3292,7 @@ extern struct super_block *get_super(struct block_device *); extern struct super_block *get_active_super(struct block_device *bdev); extern void drop_super(struct super_block *sb); extern void drop_super_exclusive(struct super_block *sb); +void drop_pagecache_sb(struct super_block *sb, void *unused); extern void iterate_supers(void (*)(struct super_block *, void *), void *); extern void iterate_supers_type(struct file_system_type *, void (*)(struct super_block *, void *), void *);