mapping->a_ops = &empty_aops;
mapping->host = inode;
mapping->flags = 0;
+ mapping->wb_err = 0;
atomic_set(&mapping->i_mmap_writable, 0);
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
mapping->private_data = NULL;
}
EXPORT_SYMBOL(unlock_two_nondirectories);
+/**
+ * inode_insert5 - obtain an inode from a mounted file system
+ * @inode: pre-allocated inode to use for insert to cache
+ * @hashval: hash value (usually inode number) to get
+ * @test: callback used for comparisons between inodes
+ * @set: callback used to initialize a new struct inode
+ * @data: opaque data pointer to pass to @test and @set
+ *
+ * Search for the inode specified by @hashval and @data in the inode cache,
+ * and if present it is return it with an increased reference count. This is
+ * a variant of iget5_locked() for callers that don't want to fail on memory
+ * allocation of inode.
+ *
+ * If the inode is not in cache, insert the pre-allocated inode to cache and
+ * return it locked, hashed, and with the I_NEW flag set. The file system gets
+ * to fill it in before unlocking it via unlock_new_inode().
+ *
+ * Note both @test and @set are called with the inode_hash_lock held, so can't
+ * sleep.
+ */
+struct inode *inode_insert5(struct inode *inode, unsigned long hashval,
+ int (*test)(struct inode *, void *),
+ int (*set)(struct inode *, void *), void *data)
+{
+ struct hlist_head *head = inode_hashtable + hash(inode->i_sb, hashval);
+ struct inode *old;
+
+again:
+ spin_lock(&inode_hash_lock);
+ old = find_inode(inode->i_sb, head, test, data);
+ if (unlikely(old)) {
+ /*
+ * Uhhuh, somebody else created the same inode under us.
+ * Use the old inode instead of the preallocated one.
+ */
+ spin_unlock(&inode_hash_lock);
+ wait_on_inode(old);
+ if (unlikely(inode_unhashed(old))) {
+ iput(old);
+ goto again;
+ }
+ return old;
+ }
+
+ if (set && unlikely(set(inode, data))) {
+ inode = NULL;
+ goto unlock;
+ }
+
+ /*
+ * Return the locked inode with I_NEW set, the
+ * caller is responsible for filling in the contents
+ */
+ spin_lock(&inode->i_lock);
+ inode->i_state |= I_NEW;
+ hlist_add_head(&inode->i_hash, head);
+ spin_unlock(&inode->i_lock);
+unlock:
+ spin_unlock(&inode_hash_lock);
+
+ return inode;
+}
+EXPORT_SYMBOL(inode_insert5);
+
/**
* iget5_locked - obtain an inode from a mounted file system
* @sb: super block of file system
int (*test)(struct inode *, void *),
int (*set)(struct inode *, void *), void *data)
{
- struct hlist_head *head = inode_hashtable + hash(sb, hashval);
- struct inode *inode;
-again:
- spin_lock(&inode_hash_lock);
- inode = find_inode(sb, head, test, data);
- spin_unlock(&inode_hash_lock);
-
- if (inode) {
- wait_on_inode(inode);
- if (unlikely(inode_unhashed(inode))) {
- iput(inode);
- goto again;
- }
- return inode;
- }
-
- inode = alloc_inode(sb);
- if (inode) {
- struct inode *old;
-
- spin_lock(&inode_hash_lock);
- /* We released the lock, so.. */
- old = find_inode(sb, head, test, data);
- if (!old) {
- if (set(inode, data))
- goto set_failed;
-
- spin_lock(&inode->i_lock);
- inode->i_state = I_NEW;
- hlist_add_head(&inode->i_hash, head);
- spin_unlock(&inode->i_lock);
- inode_sb_list_add(inode);
- spin_unlock(&inode_hash_lock);
+ struct inode *inode = ilookup5(sb, hashval, test, data);
- /* Return the locked inode with I_NEW set, the
- * caller is responsible for filling in the contents
- */
- return inode;
- }
+ if (!inode) {
+ struct inode *new = new_inode(sb);
- /*
- * Uhhuh, somebody else created the same inode under
- * us. Use the old inode instead of the one we just
- * allocated.
- */
- spin_unlock(&inode_hash_lock);
- destroy_inode(inode);
- inode = old;
- wait_on_inode(inode);
- if (unlikely(inode_unhashed(inode))) {
- iput(inode);
- goto again;
+ if (new) {
+ inode = inode_insert5(new, hashval, test, set, data);
+ if (unlikely(inode != new))
+ iput(new);
}
}
return inode;
-
-set_failed:
- spin_unlock(&inode_hash_lock);
- destroy_inode(inode);
- return NULL;
}
EXPORT_SYMBOL(iget5_locked);
int insert_inode_locked4(struct inode *inode, unsigned long hashval,
int (*test)(struct inode *, void *), void *data)
{
- struct super_block *sb = inode->i_sb;
- struct hlist_head *head = inode_hashtable + hash(sb, hashval);
-
- while (1) {
- struct inode *old = NULL;
+ struct inode *old = inode_insert5(inode, hashval, test, NULL, data);
- spin_lock(&inode_hash_lock);
- hlist_for_each_entry(old, head, i_hash) {
- if (old->i_sb != sb)
- continue;
- if (!test(old, data))
- continue;
- spin_lock(&old->i_lock);
- if (old->i_state & (I_FREEING|I_WILL_FREE)) {
- spin_unlock(&old->i_lock);
- continue;
- }
- break;
- }
- if (likely(!old)) {
- spin_lock(&inode->i_lock);
- inode->i_state |= I_NEW;
- hlist_add_head(&inode->i_hash, head);
- spin_unlock(&inode->i_lock);
- spin_unlock(&inode_hash_lock);
- return 0;
- }
- __iget(old);
- spin_unlock(&old->i_lock);
- spin_unlock(&inode_hash_lock);
- wait_on_inode(old);
- if (unlikely(!inode_unhashed(old))) {
- iput(old);
- return -EBUSY;
- }
+ if (old != inode) {
iput(old);
+ return -EBUSY;
}
+ return 0;
}
EXPORT_SYMBOL(insert_inode_locked4);
if (upperdentry) {
struct inode *realinode = d_inode(upperdentry);
- if ((!timespec_equal(&inode->i_mtime, &realinode->i_mtime) ||
- !timespec_equal(&inode->i_ctime, &realinode->i_ctime))) {
+ if ((!timespec64_equal(&inode->i_mtime, &realinode->i_mtime) ||
+ !timespec64_equal(&inode->i_ctime, &realinode->i_ctime))) {
inode->i_mtime = realinode->i_mtime;
inode->i_ctime = realinode->i_ctime;
}
/*
* Is mtime younger than atime? If yes, update atime:
*/
- if (timespec_compare(&inode->i_mtime, &inode->i_atime) >= 0)
+ if (timespec64_compare(&inode->i_mtime, &inode->i_atime) >= 0)
return 1;
/*
* Is ctime younger than atime? If yes, update atime:
*/
- if (timespec_compare(&inode->i_ctime, &inode->i_atime) >= 0)
+ if (timespec64_compare(&inode->i_ctime, &inode->i_atime) >= 0)
return 1;
/*
return 0;
}
-int generic_update_time(struct inode *inode, struct timespec *time, int flags)
+int generic_update_time(struct inode *inode, struct timespec64 *time, int flags)
{
int iflags = I_DIRTY_TIME;
bool dirty = false;
* This does the actual work of updating an inodes time or version. Must have
* had called mnt_want_write() before calling this.
*/
-static int update_time(struct inode *inode, struct timespec *time, int flags)
+static int update_time(struct inode *inode, struct timespec64 *time, int flags)
{
- int (*update_time)(struct inode *, struct timespec *, int);
+ int (*update_time)(struct inode *, struct timespec64 *, int);
update_time = inode->i_op->update_time ? inode->i_op->update_time :
generic_update_time;
bool rcu)
{
struct vfsmount *mnt = path->mnt;
- struct timespec now;
+ struct timespec64 now;
if (inode->i_flags & S_NOATIME)
return false;
now = current_time(inode);
- if (!relatime_need_update(path, inode, now, rcu))
+ if (!relatime_need_update(path, inode, timespec64_to_timespec(now), rcu))
return false;
- if (timespec_equal(&inode->i_atime, &now))
+ if (timespec64_equal(&inode->i_atime, &now))
return false;
return true;
{
struct vfsmount *mnt = path->mnt;
struct inode *inode = d_inode(path->dentry);
- struct timespec now;
+ struct timespec64 now;
if (!__atime_needs_update(path, inode, false))
return;
int file_update_time(struct file *file)
{
struct inode *inode = file_inode(file);
- struct timespec now;
+ struct timespec64 now;
int sync_it = 0;
int ret;
return 0;
now = current_time(inode);
- if (!timespec_equal(&inode->i_mtime, &now))
+ if (!timespec64_equal(&inode->i_mtime, &now))
sync_it = S_MTIME;
- if (!timespec_equal(&inode->i_ctime, &now))
+ if (!timespec64_equal(&inode->i_ctime, &now))
sync_it |= S_CTIME;
if (IS_I_VERSION(inode) && inode_iversion_need_inc(inode))
}
EXPORT_SYMBOL(inode_nohighmem);
+/**
+ * timespec64_trunc - Truncate timespec64 to a granularity
+ * @t: Timespec64
+ * @gran: Granularity in ns.
+ *
+ * Truncate a timespec64 to a granularity. Always rounds down. gran must
+ * not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns).
+ */
+struct timespec64 timespec64_trunc(struct timespec64 t, unsigned gran)
+{
+ /* Avoid division in the common cases 1 ns and 1 s. */
+ if (gran == 1) {
+ /* nothing */
+ } else if (gran == NSEC_PER_SEC) {
+ t.tv_nsec = 0;
+ } else if (gran > 1 && gran < NSEC_PER_SEC) {
+ t.tv_nsec -= t.tv_nsec % gran;
+ } else {
+ WARN(1, "illegal file time granularity: %u", gran);
+ }
+ return t;
+}
+EXPORT_SYMBOL(timespec64_trunc);
+
/**
* current_time - Return FS time
* @inode: inode.
* Note that inode and inode->sb cannot be NULL.
* Otherwise, the function warns and returns time without truncation.
*/
-struct timespec current_time(struct inode *inode)
+struct timespec64 current_time(struct inode *inode)
{
- struct timespec now = current_kernel_time();
+ struct timespec64 now = current_kernel_time64();
if (unlikely(!inode->i_sb)) {
WARN(1, "current_time() called with uninitialized super_block in the inode");
return now;
}
- return timespec_trunc(now, inode->i_sb->s_time_gran);
+ return timespec64_trunc(now, inode->i_sb->s_time_gran);
}
EXPORT_SYMBOL(current_time);
projects / linux-2.6-microblaze.git / blobdiff