written at any point after PG_Dirty is clear. Once it is known to be
safe, PG_Writeback is cleared.
-Writeback makes use of a writeback_control structure...
+Writeback makes use of a writeback_control structure to direct the
+operations. This gives the the writepage and writepages operations some
+information about the nature of and reason for the writeback request,
+and the constraints under which it is being done. It is also used to
+return information back to the caller about the result of a writepage or
+writepages request.
+
+Handling errors during writeback
+--------------------------------
+Most applications that do buffered I/O will periodically call a file
+synchronization call (fsync, fdatasync, msync or sync_file_range) to
+ensure that data written has made it to the backing store. When there
+is an error during writeback, they expect that error to be reported when
+a file sync request is made. After an error has been reported on one
+request, subsequent requests on the same file descriptor should return
+0, unless further writeback errors have occurred since the previous file
+syncronization.
+
+Ideally, the kernel would report errors only on file descriptions on
+which writes were done that subsequently failed to be written back. The
+generic pagecache infrastructure does not track the file descriptions
+that have dirtied each individual page however, so determining which
+file descriptors should get back an error is not possible.
+
+Instead, the generic writeback error tracking infrastructure in the
+kernel settles for reporting errors to fsync on all file descriptions
+that were open at the time that the error occurred. In a situation with
+multiple writers, all of them will get back an error on a subsequent fsync,
+even if all of the writes done through that particular file descriptor
+succeeded (or even if there were no writes on that file descriptor at all).
+
+Filesystems that wish to use this infrastructure should call
+mapping_set_error to record the error in the address_space when it
+occurs. Then, after writing back data from the pagecache in their
+file->fsync operation, they should call file_check_and_advance_wb_err to
+ensure that the struct file's error cursor has advanced to the correct
+point in the stream of errors emitted by the backing device(s).
struct address_space_operations
-------------------------------
The File Object
===============
-A file object represents a file opened by a process.
+A file object represents a file opened by a process. This is also known
+as an "open file description" in POSIX parlance.
struct file_operations
release: called when the last reference to an open file is closed
- fsync: called by the fsync(2) system call
+ fsync: called by the fsync(2) system call. Also see the section above
+ entitled "Handling errors during writeback".
fasync: called by the fcntl(2) system call when asynchronous
(non-blocking) mode is enabled for a file
mount can be accurately replicated (e.g. umounting and mounting again)
based on the information found in /proc/mounts.
- A simple method of saving options at mount/remount time and showing
- them is provided with the save_mount_options() and
- generic_show_options() helper functions. Please note, that using
- these may have drawbacks. For more info see header comments for these
- functions in fs/namespace.c.
-
Resources
=========
static struct inode *afs_alloc_inode(struct super_block *sb);
static void afs_destroy_inode(struct inode *inode);
static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
+ static int afs_show_devname(struct seq_file *m, struct dentry *root);
+ static int afs_show_options(struct seq_file *m, struct dentry *root);
struct file_system_type afs_fs_type = {
.owner = THIS_MODULE,
.drop_inode = afs_drop_inode,
.destroy_inode = afs_destroy_inode,
.evict_inode = afs_evict_inode,
- .show_options = generic_show_options,
+ .show_devname = afs_show_devname,
+ .show_options = afs_show_options,
};
static struct kmem_cache *afs_inode_cachep;
_leave("");
}
+ /*
+ * Display the mount device name in /proc/mounts.
+ */
+ static int afs_show_devname(struct seq_file *m, struct dentry *root)
+ {
+ struct afs_super_info *as = root->d_sb->s_fs_info;
+ struct afs_volume *volume = as->volume;
+ struct afs_cell *cell = volume->cell;
+ const char *suf = "";
+ char pref = '%';
+
+ switch (volume->type) {
+ case AFSVL_RWVOL:
+ break;
+ case AFSVL_ROVOL:
+ pref = '#';
+ if (volume->type_force)
+ suf = ".readonly";
+ break;
+ case AFSVL_BACKVOL:
+ pref = '#';
+ suf = ".backup";
+ break;
+ }
+
+ seq_printf(m, "%c%s:%s%s", pref, cell->name, volume->vlocation->vldb.name, suf);
+ return 0;
+ }
+
+ /*
+ * Display the mount options in /proc/mounts.
+ */
+ static int afs_show_options(struct seq_file *m, struct dentry *root)
+ {
+ if (test_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(d_inode(root))->flags))
+ seq_puts(m, "autocell");
+ return 0;
+ }
+
/*
* parse the mount options
* - this function has been shamelessly adapted from the ext3 fs which
sb->s_blocksize_bits = PAGE_SHIFT;
sb->s_magic = AFS_FS_MAGIC;
sb->s_op = &afs_super_ops;
+ sb->s_xattr = afs_xattr_handlers;
ret = super_setup_bdi(sb);
if (ret)
return ret;
deactivate_locked_super(sb);
goto error;
}
- save_mount_options(sb, new_opts);
sb->s_flags |= MS_ACTIVE;
} else {
_debug("reuse");
}
break;
case Opt_alloc_start:
- num = match_strdup(&args[0]);
- if (num) {
- mutex_lock(&info->chunk_mutex);
- info->alloc_start = memparse(num, NULL);
- mutex_unlock(&info->chunk_mutex);
- kfree(num);
- btrfs_info(info, "allocations start at %llu",
- info->alloc_start);
- } else {
- ret = -ENOMEM;
- goto out;
- }
+ btrfs_info(info,
+ "option alloc_start is obsolete, ignored");
break;
case Opt_acl:
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
goto fail_close;
}
- save_mount_options(sb, data);
cleancache_init_fs(sb);
sb->s_flags |= MS_ACTIVE;
return 0;
return 0;
}
- btrfs_wait_ordered_roots(fs_info, -1, 0, (u64)-1);
+ btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
trans = btrfs_attach_transaction_barrier(root);
if (IS_ERR(trans)) {
seq_puts(seq, ",nobarrier");
if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE)
seq_printf(seq, ",max_inline=%llu", info->max_inline);
- if (info->alloc_start != 0)
- seq_printf(seq, ",alloc_start=%llu", info->alloc_start);
if (info->thread_pool_size != min_t(unsigned long,
num_online_cpus() + 2, 8))
seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
unsigned long old_opts = fs_info->mount_opt;
unsigned long old_compress_type = fs_info->compress_type;
u64 old_max_inline = fs_info->max_inline;
- u64 old_alloc_start = fs_info->alloc_start;
int old_thread_pool_size = fs_info->thread_pool_size;
unsigned int old_metadata_ratio = fs_info->metadata_ratio;
int ret;
fs_info->mount_opt = old_opts;
fs_info->compress_type = old_compress_type;
fs_info->max_inline = old_max_inline;
- mutex_lock(&fs_info->chunk_mutex);
- fs_info->alloc_start = old_alloc_start;
- mutex_unlock(&fs_info->chunk_mutex);
btrfs_resize_thread_pool(fs_info,
old_thread_pool_size, fs_info->thread_pool_size);
fs_info->metadata_ratio = old_metadata_ratio;
static int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
u64 *free_bytes)
{
- struct btrfs_root *root = fs_info->tree_root;
struct btrfs_device_info *devices_info;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
u64 skip_space;
u64 type;
u64 avail_space;
- u64 used_space;
u64 min_stripe_size;
int min_stripes = 1, num_stripes = 1;
int i = 0, nr_devices;
- int ret;
/*
* We aren't under the device list lock, so this is racy-ish, but good
}
devices_info = kmalloc_array(nr_devices, sizeof(*devices_info),
- GFP_NOFS);
+ GFP_KERNEL);
if (!devices_info)
return -ENOMEM;
/* calc min stripe number for data space allocation */
- type = btrfs_get_alloc_profile(root, 1);
+ type = btrfs_data_alloc_profile(fs_info);
if (type & BTRFS_BLOCK_GROUP_RAID0) {
min_stripes = 2;
num_stripes = nr_devices;
else
min_stripe_size = BTRFS_STRIPE_LEN;
- if (fs_info->alloc_start)
- mutex_lock(&fs_devices->device_list_mutex);
rcu_read_lock();
list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) {
if (!device->in_fs_metadata || !device->bdev ||
*/
skip_space = SZ_1M;
- /* user can set the offset in fs_info->alloc_start. */
- if (fs_info->alloc_start &&
- fs_info->alloc_start + BTRFS_STRIPE_LEN <=
- device->total_bytes) {
- rcu_read_unlock();
- skip_space = max(fs_info->alloc_start, skip_space);
-
- /*
- * btrfs can not use the free space in
- * [0, skip_space - 1], we must subtract it from the
- * total. In order to implement it, we account the used
- * space in this range first.
- */
- ret = btrfs_account_dev_extents_size(device, 0,
- skip_space - 1,
- &used_space);
- if (ret) {
- kfree(devices_info);
- mutex_unlock(&fs_devices->device_list_mutex);
- return ret;
- }
-
- rcu_read_lock();
-
- /* calc the free space in [0, skip_space - 1] */
- skip_space -= used_space;
- }
-
/*
* we can use the free space in [0, skip_space - 1], subtract
* it from the total.
i++;
}
rcu_read_unlock();
- if (fs_info->alloc_start)
- mutex_unlock(&fs_devices->device_list_mutex);
nr_devices = i;
* multiplier to scale the sizes.
*
* Unused device space usage is based on simulating the chunk allocator
- * algorithm that respects the device sizes, order of allocations and the
- * 'alloc_start' value, this is a close approximation of the actual use but
- * there are other factors that may change the result (like a new metadata
- * chunk).
+ * algorithm that respects the device sizes and order of allocations. This is
+ * a close approximation of the actual use but there are other factors that may
+ * change the result (like a new metadata chunk).
*
* If metadata is exhausted, f_bavail will be 0.
*/
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *root = fs_info->tree_root;
- fs_info->fs_frozen = 1;
+ set_bit(BTRFS_FS_FROZEN, &fs_info->flags);
/*
* We don't need a barrier here, we'll wait for any transaction that
* could be in progress on other threads (and do delayed iputs that
static int btrfs_unfreeze(struct super_block *sb)
{
- btrfs_sb(sb)->fs_frozen = 0;
+ struct btrfs_fs_info *fs_info = btrfs_sb(sb);
+
+ clear_bit(BTRFS_FS_FROZEN, &fs_info->flags);
return 0;
}
static struct kmem_cache *dentry_cache __read_mostly;
+ const struct qstr empty_name = QSTR_INIT("", 0);
+ EXPORT_SYMBOL(empty_name);
+ const struct qstr slash_name = QSTR_INIT("/", 1);
+ EXPORT_SYMBOL(slash_name);
+
/*
* This is the single most critical data structure when it comes
* to the dcache: the hashtable for lookups. Somebody should try
return dentry->d_name.name != dentry->d_iname;
}
+void take_dentry_name_snapshot(struct name_snapshot *name, struct dentry *dentry)
+{
+ spin_lock(&dentry->d_lock);
+ if (unlikely(dname_external(dentry))) {
+ struct external_name *p = external_name(dentry);
+ atomic_inc(&p->u.count);
+ spin_unlock(&dentry->d_lock);
+ name->name = p->name;
+ } else {
+ memcpy(name->inline_name, dentry->d_iname, DNAME_INLINE_LEN);
+ spin_unlock(&dentry->d_lock);
+ name->name = name->inline_name;
+ }
+}
+EXPORT_SYMBOL(take_dentry_name_snapshot);
+
+void release_dentry_name_snapshot(struct name_snapshot *name)
+{
+ if (unlikely(name->name != name->inline_name)) {
+ struct external_name *p;
+ p = container_of(name->name, struct external_name, name[0]);
+ if (unlikely(atomic_dec_and_test(&p->u.count)))
+ kfree_rcu(p, u.head);
+ }
+}
+EXPORT_SYMBOL(release_dentry_name_snapshot);
+
static inline void __d_set_inode_and_type(struct dentry *dentry,
struct inode *inode,
unsigned type_flags)
LIST_HEAD(dispose);
freed = list_lru_walk(&sb->s_dentry_lru,
- dentry_lru_isolate_shrink, &dispose, UINT_MAX);
+ dentry_lru_isolate_shrink, &dispose, 1024);
this_cpu_sub(nr_dentry_unused, freed);
shrink_dentry_list(&dispose);
- } while (freed > 0);
+ cond_resched();
+ } while (list_lru_count(&sb->s_dentry_lru) > 0);
}
EXPORT_SYMBOL(shrink_dcache_sb);
*/
dentry->d_iname[DNAME_INLINE_LEN-1] = 0;
if (unlikely(!name)) {
- static const struct qstr anon = QSTR_INIT("/", 1);
- name = &anon;
+ name = &slash_name;
dname = dentry->d_iname;
} else if (name->len > DNAME_INLINE_LEN-1) {
size_t size = offsetof(struct external_name, name[1]);
static void __init dcache_init_early(void)
{
- unsigned int loop;
-
/* If hashes are distributed across NUMA nodes, defer
* hash allocation until vmalloc space is available.
*/
sizeof(struct hlist_bl_head),
dhash_entries,
13,
- HASH_EARLY,
+ HASH_EARLY | HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
-
- for (loop = 0; loop < (1U << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
static void __init dcache_init(void)
{
- unsigned int loop;
-
- /*
+ /*
* A constructor could be added for stable state like the lists,
* but it is probably not worth it because of the cache nature
- * of the dcache.
+ * of the dcache.
*/
dentry_cache = KMEM_CACHE(dentry,
SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD|SLAB_ACCOUNT);
sizeof(struct hlist_bl_head),
dhash_entries,
13,
- 0,
+ HASH_ZERO,
&d_hash_shift,
&d_hash_mask,
0,
0);
-
- for (loop = 0; loop < (1U << d_hash_shift); loop++)
- INIT_HLIST_BL_HEAD(dentry_hashtable + loop);
}
/* SLAB cache for __getname() consumers */
void __init vfs_caches_init_early(void)
{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(in_lookup_hashtable); i++)
+ INIT_HLIST_BL_HEAD(&in_lookup_hashtable[i]);
+
dcache_init_early();
inode_init_early();
}
* 2 as published by the Free Software Foundation.
*
* debugfs is for people to use instead of /proc or /sys.
- * See Documentation/DocBook/kernel-api for more details.
+ * See ./Documentation/core-api/kernel-api.rst for more details.
*
*/
struct debugfs_fs_info *fsi;
int err;
- save_mount_options(sb, data);
-
fsi = kzalloc(sizeof(struct debugfs_fs_info), GFP_KERNEL);
sb->s_fs_info = fsi;
if (!fsi) {
{
int error;
struct dentry *dentry = NULL, *trap;
- const char *old_name;
+ struct name_snapshot old_name;
trap = lock_rename(new_dir, old_dir);
/* Source or destination directories don't exist? */
if (IS_ERR(dentry) || dentry == trap || d_really_is_positive(dentry))
goto exit;
- old_name = fsnotify_oldname_init(old_dentry->d_name.name);
+ take_dentry_name_snapshot(&old_name, old_dentry);
error = simple_rename(d_inode(old_dir), old_dentry, d_inode(new_dir),
dentry, 0);
if (error) {
- fsnotify_oldname_free(old_name);
+ release_dentry_name_snapshot(&old_name);
goto exit;
}
d_move(old_dentry, dentry);
- fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name,
+ fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name.name,
d_is_dir(old_dentry),
NULL, old_dentry);
- fsnotify_oldname_free(old_name);
+ release_dentry_name_snapshot(&old_name);
unlock_rename(new_dir, old_dir);
dput(dentry);
return old_dentry;
static DEFINE_RWLOCK(file_systems_lock);
/* WARNING: This can be used only if we _already_ own a reference */
- void get_filesystem(struct file_system_type *fs)
+ struct file_system_type *get_filesystem(struct file_system_type *fs)
{
__module_get(fs->owner);
+ return fs;
}
void put_filesystem(struct file_system_type *fs)
int len = dot ? dot - name : strlen(name);
fs = __get_fs_type(name, len);
- if (!fs && (request_module("fs-%.*s", len, name) == 0))
+ if (!fs && (request_module("fs-%.*s", len, name) == 0)) {
fs = __get_fs_type(name, len);
+ WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no fs?\n", len, name);
+ }
if (dot && fs && !(fs->fs_flags & FS_HAS_SUBTYPE)) {
put_filesystem(fs);
struct buffer_head *bh;
struct gfs2_leaf *leaf;
struct gfs2_dirent *dent;
- struct qstr name = { .name = "" };
struct timespec tv = current_time(inode);
error = gfs2_alloc_blocks(ip, &bn, &n, 0, NULL);
leaf->lf_sec = cpu_to_be64(tv.tv_sec);
memset(leaf->lf_reserved2, 0, sizeof(leaf->lf_reserved2));
dent = (struct gfs2_dirent *)(leaf+1);
- gfs2_qstr2dirent(&name, bh->b_size - sizeof(struct gfs2_leaf), dent);
+ gfs2_qstr2dirent(&empty_name, bh->b_size - sizeof(struct gfs2_leaf), dent);
*pbh = bh;
return leaf;
}
"g.offset (%u)\n",
(unsigned long long)bh->b_blocknr,
entries2, g.offset);
-
+ gfs2_consist_inode(ip);
error = -EIO;
goto out_free;
}
(unsigned long long)dip->i_no_addr,
dip->i_entries,
g.offset);
+ gfs2_consist_inode(dip);
error = -EIO;
goto out;
}
gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
for (x = 0; x < rlist.rl_rgrps; x++) {
- struct gfs2_rgrpd *rgd;
- rgd = rlist.rl_ghs[x].gh_gl->gl_object;
+ struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(rlist.rl_ghs[x].gh_gl);
+
rg_blocks += rgd->rd_length;
}
static const struct inode_operations hugetlbfs_inode_operations;
struct hugetlbfs_config {
- kuid_t uid;
- kgid_t gid;
- umode_t mode;
- long max_hpages;
- long nr_inodes;
- struct hstate *hstate;
- long min_hpages;
+ struct hstate *hstate;
+ long max_hpages;
+ long nr_inodes;
+ long min_hpages;
+ kuid_t uid;
+ kgid_t gid;
+ umode_t mode;
};
struct hugetlbfs_inode_info {
return MIGRATEPAGE_SUCCESS;
}
+static int hugetlbfs_error_remove_page(struct address_space *mapping,
+ struct page *page)
+{
+ struct inode *inode = mapping->host;
+
+ remove_huge_page(page);
+ hugetlb_fix_reserve_counts(inode);
+ return 0;
+}
+
+ /*
+ * Display the mount options in /proc/mounts.
+ */
+ static int hugetlbfs_show_options(struct seq_file *m, struct dentry *root)
+ {
+ struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(root->d_sb);
+ struct hugepage_subpool *spool = sbinfo->spool;
+ unsigned long hpage_size = huge_page_size(sbinfo->hstate);
+ unsigned hpage_shift = huge_page_shift(sbinfo->hstate);
+ char mod;
+
+ if (!uid_eq(sbinfo->uid, GLOBAL_ROOT_UID))
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(&init_user_ns, sbinfo->uid));
+ if (!gid_eq(sbinfo->gid, GLOBAL_ROOT_GID))
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(&init_user_ns, sbinfo->gid));
+ if (sbinfo->mode != 0755)
+ seq_printf(m, ",mode=%o", sbinfo->mode);
+ if (sbinfo->max_inodes != -1)
+ seq_printf(m, ",nr_inodes=%lu", sbinfo->max_inodes);
+
+ hpage_size /= 1024;
+ mod = 'K';
+ if (hpage_size >= 1024) {
+ hpage_size /= 1024;
+ mod = 'M';
+ }
+ seq_printf(m, ",pagesize=%lu%c", hpage_size, mod);
+ if (spool) {
+ if (spool->max_hpages != -1)
+ seq_printf(m, ",size=%llu",
+ (unsigned long long)spool->max_hpages << hpage_shift);
+ if (spool->min_hpages != -1)
+ seq_printf(m, ",min_size=%llu",
+ (unsigned long long)spool->min_hpages << hpage_shift);
+ }
+ return 0;
+ }
+
static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct hugetlbfs_sb_info *sbinfo = HUGETLBFS_SB(dentry->d_sb);
.write_end = hugetlbfs_write_end,
.set_page_dirty = hugetlbfs_set_page_dirty,
.migratepage = hugetlbfs_migrate_page,
+ .error_remove_page = hugetlbfs_error_remove_page,
};
.evict_inode = hugetlbfs_evict_inode,
.statfs = hugetlbfs_statfs,
.put_super = hugetlbfs_put_super,
- .show_options = generic_show_options,
+ .show_options = hugetlbfs_show_options,
};
- enum { NO_SIZE, SIZE_STD, SIZE_PERCENT };
+ enum hugetlbfs_size_type { NO_SIZE, SIZE_STD, SIZE_PERCENT };
/*
* Convert size option passed from command line to number of huge pages
* in the pool specified by hstate. Size option could be in bytes
* (val_type == SIZE_STD) or percentage of the pool (val_type == SIZE_PERCENT).
*/
- static long long
+ static long
hugetlbfs_size_to_hpages(struct hstate *h, unsigned long long size_opt,
- int val_type)
+ enum hugetlbfs_size_type val_type)
{
if (val_type == NO_SIZE)
return -1;
substring_t args[MAX_OPT_ARGS];
int option;
unsigned long long max_size_opt = 0, min_size_opt = 0;
- int max_val_type = NO_SIZE, min_val_type = NO_SIZE;
+ enum hugetlbfs_size_type max_val_type = NO_SIZE, min_val_type = NO_SIZE;
if (!options)
return 0;
struct hugetlbfs_config config;
struct hugetlbfs_sb_info *sbinfo;
- save_mount_options(sb, data);
-
config.max_hpages = -1; /* No limit on size by default */
config.nr_inodes = -1; /* No limit on number of inodes by default */
config.uid = current_fsuid();
sbinfo->max_inodes = config.nr_inodes;
sbinfo->free_inodes = config.nr_inodes;
sbinfo->spool = NULL;
+ sbinfo->uid = config.uid;
+ sbinfo->gid = config.gid;
+ sbinfo->mode = config.mode;
+
/*
* Allocate and initialize subpool if maximum or minimum size is
* specified. Any needed reservations (for minimim size) are taken
/* Source inode owner (or CAP_FOWNER) can hardlink all they like,
* otherwise, it must be a safe source.
*/
- if (inode_owner_or_capable(inode) || safe_hardlink_source(inode))
+ if (safe_hardlink_source(inode) || inode_owner_or_capable(inode))
return 0;
audit_log_link_denied("linkat", link);
struct dentry *vfs_tmpfile(struct dentry *dentry, umode_t mode, int open_flag)
{
- static const struct qstr name = QSTR_INIT("/", 1);
struct dentry *child = NULL;
struct inode *dir = dentry->d_inode;
struct inode *inode;
if (!dir->i_op->tmpfile)
goto out_err;
error = -ENOMEM;
- child = d_alloc(dentry, &name);
+ child = d_alloc(dentry, &slash_name);
if (unlikely(!child))
goto out_err;
error = dir->i_op->tmpfile(dir, child, mode);
* The worst of all namespace operations - renaming directory. "Perverted"
* doesn't even start to describe it. Somebody in UCB had a heck of a trip...
* Problems:
+ *
* a) we can get into loop creation.
* b) race potential - two innocent renames can create a loop together.
* That's where 4.4 screws up. Current fix: serialization on
{
int error;
bool is_dir = d_is_dir(old_dentry);
- const unsigned char *old_name;
struct inode *source = old_dentry->d_inode;
struct inode *target = new_dentry->d_inode;
bool new_is_dir = false;
unsigned max_links = new_dir->i_sb->s_max_links;
+ struct name_snapshot old_name;
if (source == target)
return 0;
if (error)
return error;
- old_name = fsnotify_oldname_init(old_dentry->d_name.name);
+ take_dentry_name_snapshot(&old_name, old_dentry);
dget(new_dentry);
if (!is_dir || (flags & RENAME_EXCHANGE))
lock_two_nondirectories(source, target);
inode_unlock(target);
dput(new_dentry);
if (!error) {
- fsnotify_move(old_dir, new_dir, old_name, is_dir,
+ fsnotify_move(old_dir, new_dir, old_name.name, is_dir,
!(flags & RENAME_EXCHANGE) ? target : NULL, old_dentry);
if (flags & RENAME_EXCHANGE) {
fsnotify_move(new_dir, old_dir, old_dentry->d_name.name,
new_is_dir, NULL, new_dentry);
}
}
- fsnotify_oldname_free(old_name);
+ release_dentry_name_snapshot(&old_name);
return error;
}
INIT_LIST_HEAD(&mnt->mnt_slave_list);
INIT_LIST_HEAD(&mnt->mnt_slave);
INIT_HLIST_NODE(&mnt->mnt_mp_list);
+ INIT_LIST_HEAD(&mnt->mnt_umounting);
init_fs_pin(&mnt->mnt_umount, drop_mountpoint);
}
return mnt;
return &p->mnt;
}
- static inline void mangle(struct seq_file *m, const char *s)
- {
- seq_escape(m, s, " \t\n\\");
- }
-
- /*
- * Simple .show_options callback for filesystems which don't want to
- * implement more complex mount option showing.
- *
- * See also save_mount_options().
- */
- int generic_show_options(struct seq_file *m, struct dentry *root)
- {
- const char *options;
-
- rcu_read_lock();
- options = rcu_dereference(root->d_sb->s_options);
-
- if (options != NULL && options[0]) {
- seq_putc(m, ',');
- mangle(m, options);
- }
- rcu_read_unlock();
-
- return 0;
- }
- EXPORT_SYMBOL(generic_show_options);
-
- /*
- * If filesystem uses generic_show_options(), this function should be
- * called from the fill_super() callback.
- *
- * The .remount_fs callback usually needs to be handled in a special
- * way, to make sure, that previous options are not overwritten if the
- * remount fails.
- *
- * Also note, that if the filesystem's .remount_fs function doesn't
- * reset all options to their default value, but changes only newly
- * given options, then the displayed options will not reflect reality
- * any more.
- */
- void save_mount_options(struct super_block *sb, char *options)
- {
- BUG_ON(sb->s_options);
- rcu_assign_pointer(sb->s_options, kstrdup(options, GFP_KERNEL));
- }
- EXPORT_SYMBOL(save_mount_options);
-
- void replace_mount_options(struct super_block *sb, char *options)
- {
- char *old = sb->s_options;
- rcu_assign_pointer(sb->s_options, options);
- if (old) {
- synchronize_rcu();
- kfree(old);
- }
- }
- EXPORT_SYMBOL(replace_mount_options);
-
#ifdef CONFIG_PROC_FS
/* iterator; we want it to have access to namespace_sem, thus here... */
static void *m_start(struct seq_file *m, loff_t *pos)
namespace_unlock();
}
- /*
+ /*
* Is the caller allowed to modify his namespace?
*/
static inline bool may_mount(void)
err = -EINVAL;
if (mnt_ns_loop(old_path.dentry))
- goto out;
+ goto out;
mp = lock_mount(path);
err = PTR_ERR(mp);
void __init mnt_init(void)
{
- unsigned u;
int err;
mnt_cache = kmem_cache_create("mnt_cache", sizeof(struct mount),
mount_hashtable = alloc_large_system_hash("Mount-cache",
sizeof(struct hlist_head),
mhash_entries, 19,
- 0,
+ HASH_ZERO,
&m_hash_shift, &m_hash_mask, 0, 0);
mountpoint_hashtable = alloc_large_system_hash("Mountpoint-cache",
sizeof(struct hlist_head),
mphash_entries, 19,
- 0,
+ HASH_ZERO,
&mp_hash_shift, &mp_hash_mask, 0, 0);
if (!mount_hashtable || !mountpoint_hashtable)
panic("Failed to allocate mount hash table\n");
- for (u = 0; u <= m_hash_mask; u++)
- INIT_HLIST_HEAD(&mount_hashtable[u]);
- for (u = 0; u <= mp_hash_mask; u++)
- INIT_HLIST_HEAD(&mountpoint_hashtable[u]);
-
kernfs_init();
err = sysfs_init();
}
}
+ /*
+ * Display the mount options in /proc/mounts.
+ */
+ static int pstore_show_options(struct seq_file *m, struct dentry *root)
+ {
+ if (kmsg_bytes != PSTORE_DEFAULT_KMSG_BYTES)
+ seq_printf(m, ",kmsg_bytes=%lu", kmsg_bytes);
+ return 0;
+ }
+
static int pstore_remount(struct super_block *sb, int *flags, char *data)
{
sync_filesystem(sb);
.drop_inode = generic_delete_inode,
.evict_inode = pstore_evict_inode,
.remount_fs = pstore_remount,
- .show_options = generic_show_options,
+ .show_options = pstore_show_options,
};
static struct super_block *pstore_sb;
switch (record->type) {
case PSTORE_TYPE_DMESG:
- scnprintf(name, sizeof(name), "dmesg-%s-%lld%s",
+ scnprintf(name, sizeof(name), "dmesg-%s-%llu%s",
record->psi->name, record->id,
record->compressed ? ".enc.z" : "");
break;
case PSTORE_TYPE_CONSOLE:
- scnprintf(name, sizeof(name), "console-%s-%lld",
+ scnprintf(name, sizeof(name), "console-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_FTRACE:
- scnprintf(name, sizeof(name), "ftrace-%s-%lld",
+ scnprintf(name, sizeof(name), "ftrace-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_MCE:
- scnprintf(name, sizeof(name), "mce-%s-%lld",
+ scnprintf(name, sizeof(name), "mce-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_PPC_RTAS:
- scnprintf(name, sizeof(name), "rtas-%s-%lld",
+ scnprintf(name, sizeof(name), "rtas-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_PPC_OF:
- scnprintf(name, sizeof(name), "powerpc-ofw-%s-%lld",
+ scnprintf(name, sizeof(name), "powerpc-ofw-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_PPC_COMMON:
- scnprintf(name, sizeof(name), "powerpc-common-%s-%lld",
+ scnprintf(name, sizeof(name), "powerpc-common-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_PMSG:
- scnprintf(name, sizeof(name), "pmsg-%s-%lld",
+ scnprintf(name, sizeof(name), "pmsg-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_PPC_OPAL:
- scnprintf(name, sizeof(name), "powerpc-opal-%s-%lld",
+ scnprintf(name, sizeof(name), "powerpc-opal-%s-%llu",
record->psi->name, record->id);
break;
case PSTORE_TYPE_UNKNOWN:
- scnprintf(name, sizeof(name), "unknown-%s-%lld",
+ scnprintf(name, sizeof(name), "unknown-%s-%llu",
record->psi->name, record->id);
break;
default:
- scnprintf(name, sizeof(name), "type%d-%s-%lld",
+ scnprintf(name, sizeof(name), "type%d-%s-%llu",
record->type, record->psi->name, record->id);
break;
}
{
struct inode *inode;
- save_mount_options(sb, data);
-
pstore_sb = sb;
sb->s_maxbytes = MAX_LFS_FILESIZE;
#include <linux/time.h>
#include <linux/pstore.h>
+ #define PSTORE_DEFAULT_KMSG_BYTES 10240
+ extern unsigned long kmsg_bytes;
+
#ifdef CONFIG_PSTORE_FTRACE
extern void pstore_register_ftrace(void);
extern void pstore_unregister_ftrace(void);
extern int pstore_mkfile(struct dentry *root,
struct pstore_record *record);
extern bool pstore_is_mounted(void);
+extern void pstore_record_init(struct pstore_record *record,
+ struct pstore_info *psi);
#endif
static size_t big_oops_buf_sz;
/* How much of the console log to snapshot */
- static unsigned long kmsg_bytes = 10240;
+ unsigned long kmsg_bytes = PSTORE_DEFAULT_KMSG_BYTES;
void pstore_set_kmsg_bytes(int bytes)
{
return total_len;
}
+void pstore_record_init(struct pstore_record *record,
+ struct pstore_info *psinfo)
+{
+ memset(record, 0, sizeof(*record));
+
+ record->psi = psinfo;
+
+ /* Report zeroed timestamp if called before timekeeping has resumed. */
+ if (__getnstimeofday(&record->time)) {
+ record->time.tv_sec = 0;
+ record->time.tv_nsec = 0;
+ }
+}
+
/*
* callback from kmsg_dump. (s2,l2) has the most recently
* written bytes, older bytes are in (s1,l1). Save as much
int header_size;
int zipped_len = -1;
size_t dump_size;
- struct pstore_record record = {
- .type = PSTORE_TYPE_DMESG,
- .count = oopscount,
- .reason = reason,
- .part = part,
- .compressed = false,
- .buf = psinfo->buf,
- .psi = psinfo,
- };
+ struct pstore_record record;
+
+ pstore_record_init(&record, psinfo);
+ record.type = PSTORE_TYPE_DMESG;
+ record.count = oopscount;
+ record.reason = reason;
+ record.part = part;
+ record.buf = psinfo->buf;
if (big_oops_buf && is_locked) {
dst = big_oops_buf;
const char *e = s + c;
while (s < e) {
- struct pstore_record record = {
- .type = PSTORE_TYPE_CONSOLE,
- .psi = psinfo,
- };
+ struct pstore_record record;
unsigned long flags;
+ pstore_record_init(&record, psinfo);
+ record.type = PSTORE_TYPE_CONSOLE;
+
if (c > psinfo->bufsize)
c = psinfo->bufsize;
if (record->buf)
return -EINVAL;
- record->buf = kmalloc(record->size, GFP_KERNEL);
- if (!record->buf)
- return -ENOMEM;
-
- if (unlikely(copy_from_user(record->buf, buf, record->size))) {
- ret = -EFAULT;
+ record->buf = memdup_user(buf, record->size);
+ if (unlikely(IS_ERR(record->buf))) {
+ ret = PTR_ERR(record->buf);
goto out;
}
ret = record->psi->write(record);
-out:
kfree(record->buf);
+out:
record->buf = NULL;
return unlikely(ret < 0) ? ret : record->size;
int unzipped_len;
char *decompressed;
+ if (!record->compressed)
+ return;
+
/* Only PSTORE_TYPE_DMESG support compression. */
- if (!record->compressed || record->type != PSTORE_TYPE_DMESG) {
+ if (record->type != PSTORE_TYPE_DMESG) {
pr_warn("ignored compressed record type %d\n", record->type);
return;
}
struct dentry *root, int quiet)
{
int failed = 0;
+ unsigned int stop_loop = 65536;
if (!psi || !root)
return;
* may reallocate record.buf. On success, pstore_mkfile() will keep
* the record.buf, so free it only on failure.
*/
- for (;;) {
+ for (; stop_loop; stop_loop--) {
struct pstore_record *record;
int rc;
pr_err("out of memory creating record\n");
break;
}
- record->psi = psi;
+ pstore_record_init(record, psi);
record->size = psi->read(record);
/* No more records left in backend? */
- if (record->size <= 0)
+ if (record->size <= 0) {
+ kfree(record);
break;
+ }
decompress_record(record);
rc = pstore_mkfile(root, record);
mutex_unlock(&psi->read_mutex);
if (failed)
- pr_warn("failed to load %d record(s) from '%s'\n",
+ pr_warn("failed to create %d record(s) from '%s'\n",
failed, psi->name);
+ if (!stop_loop)
+ pr_err("looping? Too many records seen from '%s'\n",
+ psi->name);
}
static void pstore_dowork(struct work_struct *work)
#define QSTR_INIT(n,l) { { { .len = l } }, .name = n }
+ extern const char empty_string[];
+ extern const struct qstr empty_name;
+ extern const char slash_string[];
+ extern const struct qstr slash_name;
+
struct dentry_stat_t {
long nr_dentry;
long nr_unused;
return d_backing_inode(d_real((struct dentry *) dentry, NULL, 0));
}
+struct name_snapshot {
+ const unsigned char *name;
+ unsigned char inline_name[DNAME_INLINE_LEN];
+};
+void take_dentry_name_snapshot(struct name_snapshot *, struct dentry *);
+void release_dentry_name_snapshot(struct name_snapshot *);
#endif /* __LINUX_DCACHE_H */
#define _LINUX_FS_H
#include <linux/linkage.h>
-#include <linux/wait.h>
+#include <linux/wait_bit.h>
#include <linux/kdev_t.h>
#include <linux/dcache.h>
#include <linux/path.h>
#include <linux/bug.h>
#include <linux/mutex.h>
#include <linux/rwsem.h>
+#include <linux/mm_types.h>
#include <linux/capability.h>
#include <linux/semaphore.h>
+#include <linux/fcntl.h>
#include <linux/fiemap.h>
#include <linux/rculist_bl.h>
#include <linux/atomic.h>
#include <linux/percpu-rwsem.h>
#include <linux/workqueue.h>
#include <linux/delayed_call.h>
+#include <linux/uuid.h>
+#include <linux/errseq.h>
#include <asm/byteorder.h>
#include <uapi/linux/fs.h>
/* File was opened by fanotify and shouldn't generate fanotify events */
#define FMODE_NONOTIFY ((__force fmode_t)0x4000000)
+/* File is capable of returning -EAGAIN if AIO will block */
+#define FMODE_AIO_NOWAIT ((__force fmode_t)0x8000000)
+
/*
* Flag for rw_copy_check_uvector and compat_rw_copy_check_uvector
* that indicates that they should check the contents of the iovec are
struct address_space;
struct writeback_control;
+/*
+ * Write life time hint values.
+ */
+enum rw_hint {
+ WRITE_LIFE_NOT_SET = 0,
+ WRITE_LIFE_NONE = RWH_WRITE_LIFE_NONE,
+ WRITE_LIFE_SHORT = RWH_WRITE_LIFE_SHORT,
+ WRITE_LIFE_MEDIUM = RWH_WRITE_LIFE_MEDIUM,
+ WRITE_LIFE_LONG = RWH_WRITE_LIFE_LONG,
+ WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME,
+};
+
#define IOCB_EVENTFD (1 << 0)
#define IOCB_APPEND (1 << 1)
#define IOCB_DIRECT (1 << 2)
#define IOCB_DSYNC (1 << 4)
#define IOCB_SYNC (1 << 5)
#define IOCB_WRITE (1 << 6)
+#define IOCB_NOWAIT (1 << 7)
struct kiocb {
struct file *ki_filp;
void (*ki_complete)(struct kiocb *iocb, long ret, long ret2);
void *private;
int ki_flags;
+ enum rw_hint ki_hint;
};
static inline bool is_sync_kiocb(struct kiocb *kiocb)
return kiocb->ki_complete == NULL;
}
-static inline int iocb_flags(struct file *file);
-
-static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
-{
- *kiocb = (struct kiocb) {
- .ki_filp = filp,
- .ki_flags = iocb_flags(filp),
- };
-}
-
/*
* "descriptor" for what we're up to with a read.
* This allows us to use the same read code yet
gfp_t gfp_mask; /* implicit gfp mask for allocations */
struct list_head private_list; /* ditto */
void *private_data; /* ditto */
+ errseq_t wb_err;
} __attribute__((aligned(sizeof(long))));
/*
* On most architectures that alignment is already the case; but
spinlock_t i_lock; /* i_blocks, i_bytes, maybe i_size */
unsigned short i_bytes;
unsigned int i_blkbits;
+ enum rw_hint i_write_hint;
blkcnt_t i_blocks;
#ifdef __NEED_I_SIZE_ORDERED
* Must not be taken from IRQ context.
*/
spinlock_t f_lock;
+ enum rw_hint f_write_hint;
atomic_long_t f_count;
unsigned int f_flags;
fmode_t f_mode;
struct list_head f_tfile_llink;
#endif /* #ifdef CONFIG_EPOLL */
struct address_space *f_mapping;
+ errseq_t f_wb_err;
} __attribute__((aligned(4))); /* lest something weird decides that 2 is OK */
struct file_handle {
#define OFFT_OFFSET_MAX INT_LIMIT(off_t)
#endif
-#include <linux/fcntl.h>
-
extern void send_sigio(struct fown_struct *fown, int fd, int band);
/*
}
#ifdef CONFIG_FILE_LOCKING
-extern int fcntl_getlk(struct file *, unsigned int, struct flock __user *);
+extern int fcntl_getlk(struct file *, unsigned int, struct flock *);
extern int fcntl_setlk(unsigned int, struct file *, unsigned int,
- struct flock __user *);
+ struct flock *);
#if BITS_PER_LONG == 32
-extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 __user *);
+extern int fcntl_getlk64(struct file *, unsigned int, struct flock64 *);
extern int fcntl_setlk64(unsigned int, struct file *, unsigned int,
- struct flock64 __user *);
+ struct flock64 *);
#endif
extern int fcntl_setlease(unsigned int fd, struct file *filp, long arg);
extern void kill_fasync(struct fasync_struct **, int, int);
extern void __f_setown(struct file *filp, struct pid *, enum pid_type, int force);
-extern void f_setown(struct file *filp, unsigned long arg, int force);
+extern int f_setown(struct file *filp, unsigned long arg, int force);
extern void f_delown(struct file *filp);
extern pid_t f_getown(struct file *filp);
extern int send_sigurg(struct fown_struct *fown);
struct sb_writers s_writers;
- char s_id[32]; /* Informational name */
- u8 s_uuid[16]; /* UUID */
+ char s_id[32]; /* Informational name */
+ uuid_t s_uuid; /* UUID */
void *s_fs_info; /* Filesystem private info */
unsigned int s_max_links;
*/
char *s_subtype;
- /*
- * Saved mount options for lazy filesystems using
- * generic_show_options()
- */
- char __rcu *s_options;
const struct dentry_operations *s_d_op; /* default d_op for dentries */
/*
return file->f_op->mmap(file, vma);
}
-static inline int call_fsync(struct file *file, loff_t start, loff_t end,
- int datasync)
-{
- return file->f_op->fsync(file, start, end, datasync);
-}
-
ssize_t rw_copy_check_uvector(int type, const struct iovec __user * uvector,
unsigned long nr_segs, unsigned long fast_segs,
struct iovec *fast_pointer,
return !uid_valid(inode->i_uid) || !gid_valid(inode->i_gid);
}
+static inline enum rw_hint file_write_hint(struct file *file)
+{
+ if (file->f_write_hint != WRITE_LIFE_NOT_SET)
+ return file->f_write_hint;
+
+ return file_inode(file)->i_write_hint;
+}
+
+static inline int iocb_flags(struct file *file);
+
+static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
+{
+ *kiocb = (struct kiocb) {
+ .ki_filp = filp,
+ .ki_flags = iocb_flags(filp),
+ .ki_hint = file_write_hint(filp),
+ };
+}
+
/*
* Inode state bits. Protected by inode->i_lock
*
* wb stat updates to grab mapping->tree_lock. See
* inode_switch_wb_work_fn() for details.
*
+ * I_OVL_INUSE Used by overlayfs to get exclusive ownership on upper
+ * and work dirs among overlayfs mounts.
+ *
* Q: What is the difference between I_WILL_FREE and I_FREEING?
*/
#define I_DIRTY_SYNC (1 << 0)
#define __I_DIRTY_TIME_EXPIRED 12
#define I_DIRTY_TIME_EXPIRED (1 << __I_DIRTY_TIME_EXPIRED)
#define I_WB_SWITCH (1 << 13)
+#define I_OVL_INUSE (1 << 14)
#define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
#define I_DIRTY_ALL (I_DIRTY | I_DIRTY_TIME)
extern int filemap_fdatawrite(struct address_space *);
extern int filemap_flush(struct address_space *);
extern int filemap_fdatawait(struct address_space *);
-extern void filemap_fdatawait_keep_errors(struct address_space *);
+extern int filemap_fdatawait_keep_errors(struct address_space *mapping);
extern int filemap_fdatawait_range(struct address_space *, loff_t lstart,
loff_t lend);
+extern bool filemap_range_has_page(struct address_space *, loff_t lstart,
+ loff_t lend);
extern int filemap_write_and_wait(struct address_space *mapping);
extern int filemap_write_and_wait_range(struct address_space *mapping,
loff_t lstart, loff_t lend);
loff_t start, loff_t end);
extern int filemap_check_errors(struct address_space *mapping);
+extern void __filemap_set_wb_err(struct address_space *mapping, int err);
+extern int __must_check file_check_and_advance_wb_err(struct file *file);
+extern int __must_check file_write_and_wait_range(struct file *file,
+ loff_t start, loff_t end);
+
+/**
+ * filemap_set_wb_err - set a writeback error on an address_space
+ * @mapping: mapping in which to set writeback error
+ * @err: error to be set in mapping
+ *
+ * When writeback fails in some way, we must record that error so that
+ * userspace can be informed when fsync and the like are called. We endeavor
+ * to report errors on any file that was open at the time of the error. Some
+ * internal callers also need to know when writeback errors have occurred.
+ *
+ * When a writeback error occurs, most filesystems will want to call
+ * filemap_set_wb_err to record the error in the mapping so that it will be
+ * automatically reported whenever fsync is called on the file.
+ *
+ * FIXME: mention FS_* flag here?
+ */
+static inline void filemap_set_wb_err(struct address_space *mapping, int err)
+{
+ /* Fastpath for common case of no error */
+ if (unlikely(err))
+ __filemap_set_wb_err(mapping, err);
+}
+
+/**
+ * filemap_check_wb_error - has an error occurred since the mark was sampled?
+ * @mapping: mapping to check for writeback errors
+ * @since: previously-sampled errseq_t
+ *
+ * Grab the errseq_t value from the mapping, and see if it has changed "since"
+ * the given value was sampled.
+ *
+ * If it has then report the latest error set, otherwise return 0.
+ */
+static inline int filemap_check_wb_err(struct address_space *mapping,
+ errseq_t since)
+{
+ return errseq_check(&mapping->wb_err, since);
+}
+
+/**
+ * filemap_sample_wb_err - sample the current errseq_t to test for later errors
+ * @mapping: mapping to be sampled
+ *
+ * Writeback errors are always reported relative to a particular sample point
+ * in the past. This function provides those sample points.
+ */
+static inline errseq_t filemap_sample_wb_err(struct address_space *mapping)
+{
+ return errseq_sample(&mapping->wb_err);
+}
+
extern int vfs_fsync_range(struct file *file, loff_t start, loff_t end,
int datasync);
extern int vfs_fsync(struct file *file, int datasync);
extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *);
extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
-ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos);
-ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos);
+ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ int flags);
+ssize_t vfs_iter_write(struct file *file, struct iov_iter *iter, loff_t *ppos,
+ int flags);
/* fs/block_dev.c */
extern ssize_t blkdev_read_iter(struct kiocb *iocb, struct iov_iter *to);
DIO_SKIP_DIO_COUNT = 0x08,
};
-void dio_end_io(struct bio *bio, int error);
+void dio_end_io(struct bio *bio);
ssize_t __blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
struct block_device *bdev, struct iov_iter *iter,
struct fiemap_extent_info *fieinfo, u64 start,
u64 len, get_block_t *get_block);
- extern void get_filesystem(struct file_system_type *fs);
+ extern struct file_system_type *get_filesystem(struct file_system_type *fs);
extern void put_filesystem(struct file_system_type *fs);
extern struct file_system_type *get_fs_type(const char *name);
extern struct super_block *get_super(struct block_device *);
extern int file_update_time(struct file *file);
- extern int generic_show_options(struct seq_file *m, struct dentry *root);
- extern void save_mount_options(struct super_block *sb, char *options);
- extern void replace_mount_options(struct super_block *sb, char *options);
-
static inline bool io_is_direct(struct file *filp)
{
return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
}
+static inline bool vma_is_dax(struct vm_area_struct *vma)
+{
+ return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
+}
+
static inline int iocb_flags(struct file *file)
{
int res = 0;
return res;
}
+static inline int kiocb_set_rw_flags(struct kiocb *ki, int flags)
+{
+ if (unlikely(flags & ~RWF_SUPPORTED))
+ return -EOPNOTSUPP;
+
+ if (flags & RWF_NOWAIT) {
+ if (!(ki->ki_filp->f_mode & FMODE_AIO_NOWAIT))
+ return -EOPNOTSUPP;
+ ki->ki_flags |= IOCB_NOWAIT;
+ }
+ if (flags & RWF_HIPRI)
+ ki->ki_flags |= IOCB_HIPRI;
+ if (flags & RWF_DSYNC)
+ ki->ki_flags |= IOCB_DSYNC;
+ if (flags & RWF_SYNC)
+ ki->ki_flags |= (IOCB_DSYNC | IOCB_SYNC);
+ return 0;
+}
+
static inline ino_t parent_ino(struct dentry *dentry)
{
ino_t res;
struct user_struct;
struct mmu_gather;
+#ifndef is_hugepd
+/*
+ * Some architectures requires a hugepage directory format that is
+ * required to support multiple hugepage sizes. For example
+ * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
+ * introduced the same on powerpc. This allows for a more flexible hugepage
+ * pagetable layout.
+ */
+typedef struct { unsigned long pd; } hugepd_t;
+#define is_hugepd(hugepd) (0)
+#define __hugepd(x) ((hugepd_t) { (x) })
+static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
+ unsigned pdshift, unsigned long end,
+ int write, struct page **pages, int *nr)
+{
+ return 0;
+}
+#else
+extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
+ unsigned pdshift, unsigned long end,
+ int write, struct page **pages, int *nr);
+#endif
+
+
#ifdef CONFIG_HUGETLB_PAGE
#include <linux/mempolicy.h>
vm_flags_t vm_flags);
long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
long freed);
-int dequeue_hwpoisoned_huge_page(struct page *page);
bool isolate_huge_page(struct page *page, struct list_head *list);
void putback_active_hugepage(struct page *page);
void free_huge_page(struct page *page);
pte_t *huge_pte_alloc(struct mm_struct *mm,
unsigned long addr, unsigned long sz);
-pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
+pte_t *huge_pte_offset(struct mm_struct *mm,
+ unsigned long addr, unsigned long sz);
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
int write);
+struct page *follow_huge_pd(struct vm_area_struct *vma,
+ unsigned long address, hugepd_t hpd,
+ int flags, int pdshift);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
pmd_t *pmd, int flags);
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
pud_t *pud, int flags);
+struct page *follow_huge_pgd(struct mm_struct *mm, unsigned long address,
+ pgd_t *pgd, int flags);
+
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pud);
unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
unsigned long address, unsigned long end, pgprot_t newprot);
+bool is_hugetlb_entry_migration(pte_t pte);
#else /* !CONFIG_HUGETLB_PAGE */
static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
static inline void hugetlb_show_meminfo(void)
{
}
+#define follow_huge_pd(vma, addr, hpd, flags, pdshift) NULL
#define follow_huge_pmd(mm, addr, pmd, flags) NULL
#define follow_huge_pud(mm, addr, pud, flags) NULL
+#define follow_huge_pgd(mm, addr, pgd, flags) NULL
#define prepare_hugepage_range(file, addr, len) (-EINVAL)
#define pmd_huge(x) 0
#define pud_huge(x) 0
#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
#define hugetlb_mcopy_atomic_pte(dst_mm, dst_pte, dst_vma, dst_addr, \
src_addr, pagep) ({ BUG(); 0; })
-#define huge_pte_offset(mm, address) 0
-static inline int dequeue_hwpoisoned_huge_page(struct page *page)
-{
- return 0;
-}
+#define huge_pte_offset(mm, address, sz) 0
static inline bool isolate_huge_page(struct page *page, struct list_head *list)
{
}
#endif
-#ifndef is_hugepd
-/*
- * Some architectures requires a hugepage directory format that is
- * required to support multiple hugepage sizes. For example
- * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
- * introduced the same on powerpc. This allows for a more flexible hugepage
- * pagetable layout.
- */
-typedef struct { unsigned long pd; } hugepd_t;
-#define is_hugepd(hugepd) (0)
-#define __hugepd(x) ((hugepd_t) { (x) })
-static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
- unsigned pdshift, unsigned long end,
- int write, struct page **pages, int *nr)
-{
- return 0;
-}
-#else
-extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
- unsigned pdshift, unsigned long end,
- int write, struct page **pages, int *nr);
-#endif
-
#define HUGETLB_ANON_FILE "anon_hugepage"
enum {
spinlock_t stat_lock;
struct hstate *hstate;
struct hugepage_subpool *spool;
+ kuid_t uid;
+ kgid_t gid;
+ umode_t mode;
};
static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
struct page *alloc_huge_page_node(struct hstate *h, int nid);
struct page *alloc_huge_page_noerr(struct vm_area_struct *vma,
unsigned long addr, int avoid_reserve);
+struct page *alloc_huge_page_nodemask(struct hstate *h, int preferred_nid,
+ nodemask_t *nmask);
int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
pgoff_t idx);
return __basepage_index(page);
}
+extern int dissolve_free_huge_page(struct page *page);
extern int dissolve_free_huge_pages(unsigned long start_pfn,
unsigned long end_pfn);
static inline bool hugepage_migration_supported(struct hstate *h)
{
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
- return huge_page_shift(h) == PMD_SHIFT;
+ if ((huge_page_shift(h) == PMD_SHIFT) ||
+ (huge_page_shift(h) == PGDIR_SHIFT))
+ return true;
+ else
+ return false;
#else
return false;
#endif
{
atomic_long_sub(l, &mm->hugetlb_usage);
}
+
+#ifndef set_huge_swap_pte_at
+static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte, unsigned long sz)
+{
+ set_huge_pte_at(mm, addr, ptep, pte);
+}
+#endif
#else /* CONFIG_HUGETLB_PAGE */
struct hstate {};
#define alloc_huge_page(v, a, r) NULL
#define alloc_huge_page_node(h, nid) NULL
+#define alloc_huge_page_nodemask(h, preferred_nid, nmask) NULL
#define alloc_huge_page_noerr(v, a, r) NULL
#define alloc_bootmem_huge_page(h) NULL
#define hstate_file(f) NULL
#define vma_mmu_pagesize(v) PAGE_SIZE
#define huge_page_order(h) 0
#define huge_page_shift(h) PAGE_SHIFT
+static inline bool hstate_is_gigantic(struct hstate *h)
+{
+ return false;
+}
+
static inline unsigned int pages_per_huge_page(struct hstate *h)
{
return 1;
}
-#define hstate_index_to_shift(index) 0
-#define hstate_index(h) 0
+
+static inline unsigned hstate_index_to_shift(unsigned index)
+{
+ return 0;
+}
+
+static inline int hstate_index(struct hstate *h)
+{
+ return 0;
+}
static inline pgoff_t basepage_index(struct page *page)
{
return page->index;
}
-#define dissolve_free_huge_pages(s, e) 0
-#define hugepage_migration_supported(h) false
+
+static inline int dissolve_free_huge_page(struct page *page)
+{
+ return 0;
+}
+
+static inline int dissolve_free_huge_pages(unsigned long start_pfn,
+ unsigned long end_pfn)
+{
+ return 0;
+}
+
+static inline bool hugepage_migration_supported(struct hstate *h)
+{
+ return false;
+}
static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
struct mm_struct *mm, pte_t *pte)
static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
{
}
+
+static inline void set_huge_swap_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte, unsigned long sz)
+{
+}
#endif /* CONFIG_HUGETLB_PAGE */
static inline spinlock_t *huge_pte_lock(struct hstate *h,
return 0;
}
#endif
+#ifndef __HAVE_ARCH_MEMCPY_FLUSHCACHE
+static inline void memcpy_flushcache(void *dst, const void *src, size_t cnt)
+{
+ memcpy(dst, src, cnt);
+}
+#endif
void *memchr_inv(const void *s, int c, size_t n);
char *strreplace(char *s, char old, char new);
extern const char *kstrdup_const(const char *s, gfp_t gfp);
extern char *kstrndup(const char *s, size_t len, gfp_t gfp);
extern void *kmemdup(const void *src, size_t len, gfp_t gfp);
+ extern char *kmemdup_nul(const char *s, size_t len, gfp_t gfp);
extern char **argv_split(gfp_t gfp, const char *str, int *argcp);
extern void argv_free(char **argv);
return tail ? tail + 1 : path;
}
+#define __FORTIFY_INLINE extern __always_inline __attribute__((gnu_inline))
+#define __RENAME(x) __asm__(#x)
+
+void fortify_panic(const char *name) __noreturn __cold;
+void __read_overflow(void) __compiletime_error("detected read beyond size of object passed as 1st parameter");
+void __read_overflow2(void) __compiletime_error("detected read beyond size of object passed as 2nd parameter");
+void __write_overflow(void) __compiletime_error("detected write beyond size of object passed as 1st parameter");
+
+#if !defined(__NO_FORTIFY) && defined(__OPTIMIZE__) && defined(CONFIG_FORTIFY_SOURCE)
+__FORTIFY_INLINE char *strncpy(char *p, const char *q, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __write_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __builtin_strncpy(p, q, size);
+}
+
+__FORTIFY_INLINE char *strcat(char *p, const char *q)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (p_size == (size_t)-1)
+ return __builtin_strcat(p, q);
+ if (strlcat(p, q, p_size) >= p_size)
+ fortify_panic(__func__);
+ return p;
+}
+
+__FORTIFY_INLINE __kernel_size_t strlen(const char *p)
+{
+ __kernel_size_t ret;
+ size_t p_size = __builtin_object_size(p, 0);
+ if (p_size == (size_t)-1)
+ return __builtin_strlen(p);
+ ret = strnlen(p, p_size);
+ if (p_size <= ret)
+ fortify_panic(__func__);
+ return ret;
+}
+
+extern __kernel_size_t __real_strnlen(const char *, __kernel_size_t) __RENAME(strnlen);
+__FORTIFY_INLINE __kernel_size_t strnlen(const char *p, __kernel_size_t maxlen)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ __kernel_size_t ret = __real_strnlen(p, maxlen < p_size ? maxlen : p_size);
+ if (p_size <= ret && maxlen != ret)
+ fortify_panic(__func__);
+ return ret;
+}
+
+/* defined after fortified strlen to reuse it */
+extern size_t __real_strlcpy(char *, const char *, size_t) __RENAME(strlcpy);
+__FORTIFY_INLINE size_t strlcpy(char *p, const char *q, size_t size)
+{
+ size_t ret;
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (p_size == (size_t)-1 && q_size == (size_t)-1)
+ return __real_strlcpy(p, q, size);
+ ret = strlen(q);
+ if (size) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ if (__builtin_constant_p(len) && len >= p_size)
+ __write_overflow();
+ if (len >= p_size)
+ fortify_panic(__func__);
+ __builtin_memcpy(p, q, len);
+ p[len] = '\0';
+ }
+ return ret;
+}
+
+/* defined after fortified strlen and strnlen to reuse them */
+__FORTIFY_INLINE char *strncat(char *p, const char *q, __kernel_size_t count)
+{
+ size_t p_len, copy_len;
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (p_size == (size_t)-1 && q_size == (size_t)-1)
+ return __builtin_strncat(p, q, count);
+ p_len = strlen(p);
+ copy_len = strnlen(q, count);
+ if (p_size < p_len + copy_len + 1)
+ fortify_panic(__func__);
+ __builtin_memcpy(p + p_len, q, copy_len);
+ p[p_len + copy_len] = '\0';
+ return p;
+}
+
+__FORTIFY_INLINE void *memset(void *p, int c, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __write_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __builtin_memset(p, c, size);
+}
+
+__FORTIFY_INLINE void *memcpy(void *p, const void *q, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (__builtin_constant_p(size)) {
+ if (p_size < size)
+ __write_overflow();
+ if (q_size < size)
+ __read_overflow2();
+ }
+ if (p_size < size || q_size < size)
+ fortify_panic(__func__);
+ return __builtin_memcpy(p, q, size);
+}
+
+__FORTIFY_INLINE void *memmove(void *p, const void *q, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (__builtin_constant_p(size)) {
+ if (p_size < size)
+ __write_overflow();
+ if (q_size < size)
+ __read_overflow2();
+ }
+ if (p_size < size || q_size < size)
+ fortify_panic(__func__);
+ return __builtin_memmove(p, q, size);
+}
+
+extern void *__real_memscan(void *, int, __kernel_size_t) __RENAME(memscan);
+__FORTIFY_INLINE void *memscan(void *p, int c, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __read_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __real_memscan(p, c, size);
+}
+
+__FORTIFY_INLINE int memcmp(const void *p, const void *q, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (__builtin_constant_p(size)) {
+ if (p_size < size)
+ __read_overflow();
+ if (q_size < size)
+ __read_overflow2();
+ }
+ if (p_size < size || q_size < size)
+ fortify_panic(__func__);
+ return __builtin_memcmp(p, q, size);
+}
+
+__FORTIFY_INLINE void *memchr(const void *p, int c, __kernel_size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __read_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __builtin_memchr(p, c, size);
+}
+
+void *__real_memchr_inv(const void *s, int c, size_t n) __RENAME(memchr_inv);
+__FORTIFY_INLINE void *memchr_inv(const void *p, int c, size_t size)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __read_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __real_memchr_inv(p, c, size);
+}
+
+extern void *__real_kmemdup(const void *src, size_t len, gfp_t gfp) __RENAME(kmemdup);
+__FORTIFY_INLINE void *kmemdup(const void *p, size_t size, gfp_t gfp)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ if (__builtin_constant_p(size) && p_size < size)
+ __read_overflow();
+ if (p_size < size)
+ fortify_panic(__func__);
+ return __real_kmemdup(p, size, gfp);
+}
+
+/* defined after fortified strlen and memcpy to reuse them */
+__FORTIFY_INLINE char *strcpy(char *p, const char *q)
+{
+ size_t p_size = __builtin_object_size(p, 0);
+ size_t q_size = __builtin_object_size(q, 0);
+ if (p_size == (size_t)-1 && q_size == (size_t)-1)
+ return __builtin_strcpy(p, q);
+ memcpy(p, q, strlen(q) + 1);
+ return p;
+}
+
+#endif
+
#endif /* _LINUX_STRING_H_ */
* @s: the string to duplicate
* @max: read at most @max chars from @s
* @gfp: the GFP mask used in the kmalloc() call when allocating memory
+ *
+ * Note: Use kmemdup_nul() instead if the size is known exactly.
*/
char *kstrndup(const char *s, size_t max, gfp_t gfp)
{
}
EXPORT_SYMBOL(kmemdup);
+ /**
+ * kmemdup_nul - Create a NUL-terminated string from unterminated data
+ * @s: The data to stringify
+ * @len: The size of the data
+ * @gfp: the GFP mask used in the kmalloc() call when allocating memory
+ */
+ char *kmemdup_nul(const char *s, size_t len, gfp_t gfp)
+ {
+ char *buf;
+
+ if (!s)
+ return NULL;
+
+ buf = kmalloc_track_caller(len + 1, gfp);
+ if (buf) {
+ memcpy(buf, s, len);
+ buf[len] = '\0';
+ }
+ return buf;
+ }
+ EXPORT_SYMBOL(kmemdup_nul);
+
/**
* memdup_user - duplicate memory region from user space
*
* Uses kmalloc to get the memory but if the allocation fails then falls back
* to the vmalloc allocator. Use kvfree for freeing the memory.
*
- * Reclaim modifiers - __GFP_NORETRY and __GFP_NOFAIL are not supported. __GFP_REPEAT
- * is supported only for large (>32kB) allocations, and it should be used only if
- * kmalloc is preferable to the vmalloc fallback, due to visible performance drawbacks.
+ * Reclaim modifiers - __GFP_NORETRY and __GFP_NOFAIL are not supported.
+ * __GFP_RETRY_MAYFAIL is supported, and it should be used only if kmalloc is
+ * preferable to the vmalloc fallback, due to visible performance drawbacks.
*
* Any use of gfp flags outside of GFP_KERNEL should be consulted with mm people.
*/
if (size > PAGE_SIZE) {
kmalloc_flags |= __GFP_NOWARN;
- /*
- * We have to override __GFP_REPEAT by __GFP_NORETRY for !costly
- * requests because there is no other way to tell the allocator
- * that we want to fail rather than retry endlessly.
- */
- if (!(kmalloc_flags & __GFP_REPEAT) ||
- (size <= PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER))
+ if (!(kmalloc_flags & __GFP_RETRY_MAYFAIL))
kmalloc_flags |= __GFP_NORETRY;
}
#include <linux/file.h>
#include <linux/parser.h>
#include <linux/slab.h>
+ #include <linux/seq_file.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include <net/9p/transport.h>
#define MAX_SOCK_BUF (64*1024)
#define MAXPOLLWADDR 2
+ static struct p9_trans_module p9_tcp_trans;
+ static struct p9_trans_module p9_fd_trans;
+
/**
* struct p9_fd_opts - per-transport options
* @rfd: file descriptor for reading (trans=fd)
int rfd;
int wfd;
u16 port;
- int privport;
+ bool privport;
};
/*
struct p9_poll_wait {
struct p9_conn *conn;
- wait_queue_t wait;
+ wait_queue_entry_t wait;
wait_queue_head_t *wait_addr;
};
clear_bit(Wworksched, &m->wsched);
}
-static int p9_pollwake(wait_queue_t *wait, unsigned int mode, int sync, void *key)
+static int p9_pollwake(wait_queue_entry_t *wait, unsigned int mode, int sync, void *key)
{
struct p9_poll_wait *pwait =
container_of(wait, struct p9_poll_wait, wait);
return 0;
}
+ static int p9_fd_show_options(struct seq_file *m, struct p9_client *clnt)
+ {
+ if (clnt->trans_mod == &p9_tcp_trans) {
+ if (clnt->trans_opts.tcp.port != P9_PORT)
+ seq_printf(m, "port=%u", clnt->trans_opts.tcp.port);
+ } else if (clnt->trans_mod == &p9_fd_trans) {
+ if (clnt->trans_opts.fd.rfd != ~0)
+ seq_printf(m, "rfd=%u", clnt->trans_opts.fd.rfd);
+ if (clnt->trans_opts.fd.wfd != ~0)
+ seq_printf(m, "wfd=%u", clnt->trans_opts.fd.wfd);
+ }
+ return 0;
+ }
+
/**
* parse_opts - parse mount options into p9_fd_opts structure
* @params: options string passed from mount
opts->port = P9_PORT;
opts->rfd = ~0;
opts->wfd = ~0;
- opts->privport = 0;
+ opts->privport = false;
if (!params)
return 0;
opts->wfd = option;
break;
case Opt_privport:
- opts->privport = 1;
+ opts->privport = true;
break;
default:
continue;
csocket = NULL;
+ client->trans_opts.tcp.port = opts.port;
+ client->trans_opts.tcp.privport = opts.privport;
sin_server.sin_family = AF_INET;
sin_server.sin_addr.s_addr = in_aton(addr);
sin_server.sin_port = htons(opts.port);
struct p9_fd_opts opts;
parse_opts(args, &opts);
+ client->trans_opts.fd.rfd = opts.rfd;
+ client->trans_opts.fd.wfd = opts.wfd;
if (opts.rfd == ~0 || opts.wfd == ~0) {
pr_err("Insufficient options for proto=fd\n");
.request = p9_fd_request,
.cancel = p9_fd_cancel,
.cancelled = p9_fd_cancelled,
+ .show_options = p9_fd_show_options,
.owner = THIS_MODULE,
};
.request = p9_fd_request,
.cancel = p9_fd_cancel,
.cancelled = p9_fd_cancelled,
+ .show_options = p9_fd_show_options,
.owner = THIS_MODULE,
};
.request = p9_fd_request,
.cancel = p9_fd_cancel,
.cancelled = p9_fd_cancelled,
+ .show_options = p9_fd_show_options,
.owner = THIS_MODULE,
};
projects / karo-tx-linux.git / commitdiff