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ceph: consider inode's last read/write when calculating wanted caps

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Add i_last_rd and i_last_wr to ceph_inode_info. These fields are
used to track the last time the client acquired read/write caps for
the inode.

If there is no read/write on an inode for 'caps_wanted_delay_max'
seconds, __ceph_caps_file_wanted() does not request caps for read/write
even there are open files.

Call __ceph_touch_fmode() for dir operations. __ceph_caps_file_wanted()
calculates dir's wanted caps according to last dir read/modification. If
there is recent dir read, dir inode wants CEPH_CAP_ANY_SHARED caps. If
there is recent dir modification, also wants CEPH_CAP_FILE_EXCL.

Readdir is a special case. Dir inode wants CEPH_CAP_FILE_EXCL after
readdir, as with that, modifications do not need to release
CEPH_CAP_FILE_SHARED or invalidate all dentry leases issued by readdir.

Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Yan, Zheng 2020-03-05 20:21:00 +08:00 committed by Ilya Dryomov
parent c0e385b106
commit 719a2514e9
8 changed files with 188 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

183
fs/ceph/caps.c
View File

@ -978,19 +978,67 @@ int __ceph_caps_used(struct ceph_inode_info *ci)
return used;
}
#define FMODE_WAIT_BIAS 1000
/*
* wanted, by virtue of open file modes
*/
int __ceph_caps_file_wanted(struct ceph_inode_info *ci)
{
int i, bits = 0;
for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
if (ci->i_nr_by_mode[i])
bits |= 1 << i;
const int PIN_SHIFT = ffs(CEPH_FILE_MODE_PIN);
const int RD_SHIFT = ffs(CEPH_FILE_MODE_RD);
const int WR_SHIFT = ffs(CEPH_FILE_MODE_WR);
const int LAZY_SHIFT = ffs(CEPH_FILE_MODE_LAZY);
struct ceph_mount_options *opt =
ceph_inode_to_client(&ci->vfs_inode)->mount_options;
unsigned long used_cutoff = jiffies - opt->caps_wanted_delay_max * HZ;
unsigned long idle_cutoff = jiffies - opt->caps_wanted_delay_min * HZ;
if (S_ISDIR(ci->vfs_inode.i_mode)) {
int want = 0;
/* use used_cutoff here, to keep dir's wanted caps longer */
if (ci->i_nr_by_mode[RD_SHIFT] > 0 ||
time_after(ci->i_last_rd, used_cutoff))
want |= CEPH_CAP_ANY_SHARED;
if (ci->i_nr_by_mode[WR_SHIFT] > 0 ||
time_after(ci->i_last_wr, used_cutoff)) {
want |= CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
if (opt->flags & CEPH_MOUNT_OPT_ASYNC_DIROPS)
want |= CEPH_CAP_ANY_DIR_OPS;
}
if (want || ci->i_nr_by_mode[PIN_SHIFT] > 0)
want |= CEPH_CAP_PIN;
return want;
} else {
int bits = 0;
if (ci->i_nr_by_mode[RD_SHIFT] > 0) {
if (ci->i_nr_by_mode[RD_SHIFT] >= FMODE_WAIT_BIAS ||
time_after(ci->i_last_rd, used_cutoff))
bits |= 1 << RD_SHIFT;
} else if (time_after(ci->i_last_rd, idle_cutoff)) {
bits |= 1 << RD_SHIFT;
}
if (ci->i_nr_by_mode[WR_SHIFT] > 0) {
if (ci->i_nr_by_mode[WR_SHIFT] >= FMODE_WAIT_BIAS ||
time_after(ci->i_last_wr, used_cutoff))
bits |= 1 << WR_SHIFT;
} else if (time_after(ci->i_last_wr, idle_cutoff)) {
bits |= 1 << WR_SHIFT;
}
/* check lazyio only when read/write is wanted */
if ((bits & (CEPH_FILE_MODE_RDWR << 1)) &&
ci->i_nr_by_mode[LAZY_SHIFT] > 0)
bits |= 1 << LAZY_SHIFT;
return bits ? ceph_caps_for_mode(bits >> 1) : 0;
}
if (bits == 0)
return 0;
return ceph_caps_for_mode(bits >> 1);
}
/*
@ -1032,14 +1080,6 @@ int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check)
return mds_wanted;
}
/*
* called under i_ceph_lock
*/
static int __ceph_is_single_caps(struct ceph_inode_info *ci)
{
return rb_first(&ci->i_caps) == rb_last(&ci->i_caps);
}
int ceph_is_any_caps(struct inode *inode)
{
struct ceph_inode_info *ci = ceph_inode(inode);
@ -1877,10 +1917,6 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
if (ci->i_ceph_flags & CEPH_I_FLUSH)
flags |= CHECK_CAPS_FLUSH;
if (!(flags & CHECK_CAPS_AUTHONLY) ||
(ci->i_auth_cap && __ceph_is_single_caps(ci)))
__cap_delay_cancel(mdsc, ci);
goto retry_locked;
retry:
spin_lock(&ci->i_ceph_lock);
@ -1907,9 +1943,7 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
if (IS_RDONLY(inode)) {
want = CEPH_CAP_ANY_SHARED;
} else {
want = CEPH_CAP_ANY_SHARED |
CEPH_CAP_FILE_EXCL |
CEPH_CAP_ANY_DIR_OPS;
want |= CEPH_CAP_ANY_SHARED | CEPH_CAP_FILE_EXCL;
}
retain |= want;
} else {
@ -2105,9 +2139,17 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags,
goto retry; /* retake i_ceph_lock and restart our cap scan. */
}
/* Reschedule delayed caps release if we delayed anything */
if (delayed)
__cap_delay_requeue(mdsc, ci, false);
if (list_empty(&ci->i_cap_delay_list)) {
if (delayed) {
/* Reschedule delayed caps release if we delayed anything */
__cap_delay_requeue(mdsc, ci, false);
} else if (__ceph_is_any_real_caps(ci) &&
(file_wanted & ~CEPH_CAP_PIN) &&
!(used & (CEPH_CAP_FILE_RD | CEPH_CAP_ANY_FILE_WR))) {
/* periodically re-calculate caps wanted by open files */
__cap_delay_requeue(mdsc, ci, true);
}
}
spin_unlock(&ci->i_ceph_lock);
@ -2573,8 +2615,9 @@ void ceph_take_cap_refs(struct ceph_inode_info *ci, int got,
* FIXME: how does a 0 return differ from -EAGAIN?
*/
enum {
NON_BLOCKING = 1,
CHECK_FILELOCK = 2,
/* first 8 bits are reserved for CEPH_FILE_MODE_FOO */
NON_BLOCKING = (1 << 8),
CHECK_FILELOCK = (1 << 9),
};
static int try_get_cap_refs(struct inode *inode, int need, int want,
@ -2584,7 +2627,6 @@ static int try_get_cap_refs(struct inode *inode, int need, int want,
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
int ret = 0;
int have, implemented;
int file_wanted;
bool snap_rwsem_locked = false;
dout("get_cap_refs %p need %s want %s\n", inode,
@ -2600,15 +2642,6 @@ static int try_get_cap_refs(struct inode *inode, int need, int want,
goto out_unlock;
}
/* make sure file is actually open */
file_wanted = __ceph_caps_file_wanted(ci);
if ((file_wanted & need) != need) {
dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
ceph_cap_string(need), ceph_cap_string(file_wanted));
ret = -EBADF;
goto out_unlock;
}
/* finish pending truncate */
while (ci->i_truncate_pending) {
spin_unlock(&ci->i_ceph_lock);
@ -2719,6 +2752,9 @@ static int try_get_cap_refs(struct inode *inode, int need, int want,
ceph_cap_string(have), ceph_cap_string(need));
}
out_unlock:
__ceph_touch_fmode(ci, mdsc, flags);
spin_unlock(&ci->i_ceph_lock);
if (snap_rwsem_locked)
up_read(&mdsc->snap_rwsem);
@ -2756,10 +2792,20 @@ static void check_max_size(struct inode *inode, loff_t endoff)
ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
}
static inline int get_used_fmode(int caps)
{
int fmode = 0;
if (caps & CEPH_CAP_FILE_RD)
fmode |= CEPH_FILE_MODE_RD;
if (caps & CEPH_CAP_FILE_WR)
fmode |= CEPH_FILE_MODE_WR;
return fmode;
}
int ceph_try_get_caps(struct inode *inode, int need, int want,
bool nonblock, int *got)
{
int ret;
int ret, flags;
BUG_ON(need & ~CEPH_CAP_FILE_RD);
BUG_ON(want & ~(CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO |
@ -2771,8 +2817,11 @@ int ceph_try_get_caps(struct inode *inode, int need, int want,
return ret;
}
ret = try_get_cap_refs(inode, need, want, 0,
(nonblock ? NON_BLOCKING : 0), got);
flags = get_used_fmode(need | want);
if (nonblock)
flags |= NON_BLOCKING;
ret = try_get_cap_refs(inode, need, want, 0, flags, got);
return ret == -EAGAIN ? 0 : ret;
}
@ -2798,11 +2847,15 @@ int ceph_get_caps(struct file *filp, int need, int want,
fi->filp_gen != READ_ONCE(fsc->filp_gen))
return -EBADF;
flags = get_used_fmode(need | want);
while (true) {
if (endoff > 0)
check_max_size(inode, endoff);
flags = atomic_read(&fi->num_locks) ? CHECK_FILELOCK : 0;
flags &= CEPH_FILE_MODE_MASK;
if (atomic_read(&fi->num_locks))
flags |= CHECK_FILELOCK;
_got = 0;
ret = try_get_cap_refs(inode, need, want, endoff,
flags, &_got);
@ -2822,6 +2875,8 @@ int ceph_get_caps(struct file *filp, int need, int want,
list_add(&cw.list, &mdsc->cap_wait_list);
spin_unlock(&mdsc->caps_list_lock);
/* make sure used fmode not timeout */
ceph_get_fmode(ci, flags, FMODE_WAIT_BIAS);
add_wait_queue(&ci->i_cap_wq, &wait);
flags |= NON_BLOCKING;
@ -2835,6 +2890,7 @@ int ceph_get_caps(struct file *filp, int need, int want,
}
remove_wait_queue(&ci->i_cap_wq, &wait);
ceph_put_fmode(ci, flags, FMODE_WAIT_BIAS);
spin_lock(&mdsc->caps_list_lock);
list_del(&cw.list);
@ -2854,7 +2910,7 @@ int ceph_get_caps(struct file *filp, int need, int want,
if (ret < 0) {
if (ret == -ESTALE) {
/* session was killed, try renew caps */
ret = ceph_renew_caps(inode);
ret = ceph_renew_caps(inode, flags);
if (ret == 0)
continue;
}
@ -4153,6 +4209,33 @@ void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc)
dout("flush_dirty_caps done\n");
}
void __ceph_touch_fmode(struct ceph_inode_info *ci,
struct ceph_mds_client *mdsc, int fmode)
{
unsigned long now = jiffies;
if (fmode & CEPH_FILE_MODE_RD)
ci->i_last_rd = now;
if (fmode & CEPH_FILE_MODE_WR)
ci->i_last_wr = now;
/* queue periodic check */
if (fmode &&
__ceph_is_any_real_caps(ci) &&
list_empty(&ci->i_cap_delay_list))
__cap_delay_requeue(mdsc, ci, true);
}
void ceph_get_fmode(struct ceph_inode_info *ci, int fmode, int count)
{
int i;
int bits = (fmode << 1) | 1;
spin_lock(&ci->i_ceph_lock);
for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
if (bits & (1 << i))
ci->i_nr_by_mode[i] += count;
}
spin_unlock(&ci->i_ceph_lock);
}
void __ceph_get_fmode(struct ceph_inode_info *ci, int fmode)
{
int i;
@ -4168,26 +4251,18 @@ void __ceph_get_fmode(struct ceph_inode_info *ci, int fmode)
* we may need to release capabilities to the MDS (or schedule
* their delayed release).
*/
void ceph_put_fmode(struct ceph_inode_info *ci, int fmode)
void ceph_put_fmode(struct ceph_inode_info *ci, int fmode, int count)
{
int i, last = 0;
int i;
int bits = (fmode << 1) | 1;
spin_lock(&ci->i_ceph_lock);
for (i = 0; i < CEPH_FILE_MODE_BITS; i++) {
if (bits & (1 << i)) {
BUG_ON(ci->i_nr_by_mode[i] == 0);
if (--ci->i_nr_by_mode[i] == 0)
last++;
BUG_ON(ci->i_nr_by_mode[i] < count);
ci->i_nr_by_mode[i] -= count;
}
}
dout("put_fmode %p fmode %d {%d,%d,%d,%d}\n",
&ci->vfs_inode, fmode,
ci->i_nr_by_mode[0], ci->i_nr_by_mode[1],
ci->i_nr_by_mode[2], ci->i_nr_by_mode[3]);
spin_unlock(&ci->i_ceph_lock);
if (last && ci->i_vino.snap == CEPH_NOSNAP)
ceph_check_caps(ci, 0, NULL);
}
/*

21
fs/ceph/dir.c
View File

@ -335,8 +335,11 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
ctx->pos = 2;
}
/* can we use the dcache? */
spin_lock(&ci->i_ceph_lock);
/* request Fx cap. if have Fx, we don't need to release Fs cap
* for later create/unlink. */
__ceph_touch_fmode(ci, mdsc, CEPH_FILE_MODE_WR);
/* can we use the dcache? */
if (ceph_test_mount_opt(fsc, DCACHE) &&
!ceph_test_mount_opt(fsc, NOASYNCREADDIR) &&
ceph_snap(inode) != CEPH_SNAPDIR &&
@ -760,6 +763,7 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
ceph_test_mount_opt(fsc, DCACHE) &&
__ceph_dir_is_complete(ci) &&
(__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1))) {
__ceph_touch_fmode(ci, mdsc, CEPH_FILE_MODE_RD);
spin_unlock(&ci->i_ceph_lock);
dout(" dir %p complete, -ENOENT\n", dir);
d_add(dentry, NULL);
@ -1621,7 +1625,8 @@ static int __dir_lease_try_check(const struct dentry *dentry)
/*
* Check if directory-wide content lease/cap is valid.
*/
static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry,
struct ceph_mds_client *mdsc)
{
struct ceph_inode_info *ci = ceph_inode(dir);
int valid;
@ -1629,7 +1634,10 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
spin_lock(&ci->i_ceph_lock);
valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1);
shared_gen = atomic_read(&ci->i_shared_gen);
if (valid) {
__ceph_touch_fmode(ci, mdsc, CEPH_FILE_MODE_RD);
shared_gen = atomic_read(&ci->i_shared_gen);
}
spin_unlock(&ci->i_ceph_lock);
if (valid) {
struct ceph_dentry_info *di;
@ -1655,6 +1663,7 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
int valid = 0;
struct dentry *parent;
struct inode *dir, *inode;
struct ceph_mds_client *mdsc;
if (flags & LOOKUP_RCU) {
parent = READ_ONCE(dentry->d_parent);
@ -1671,6 +1680,8 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
dout("d_revalidate %p '%pd' inode %p offset 0x%llx\n", dentry,
dentry, inode, ceph_dentry(dentry)->offset);
mdsc = ceph_sb_to_client(dir->i_sb)->mdsc;
/* always trust cached snapped dentries, snapdir dentry */
if (ceph_snap(dir) != CEPH_NOSNAP) {
dout("d_revalidate %p '%pd' inode %p is SNAPPED\n", dentry,
@ -1682,7 +1693,7 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
valid = dentry_lease_is_valid(dentry, flags);
if (valid == -ECHILD)
return valid;
if (valid || dir_lease_is_valid(dir, dentry)) {
if (valid || dir_lease_is_valid(dir, dentry, mdsc)) {
if (inode)
valid = ceph_is_any_caps(inode);
else
@ -1691,8 +1702,6 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
}
if (!valid) {
struct ceph_mds_client *mdsc =
ceph_sb_to_client(dir->i_sb)->mdsc;
struct ceph_mds_request *req;
int op, err;
u32 mask;

21
fs/ceph/file.c
View File

@ -213,7 +213,7 @@ static int ceph_init_file_info(struct inode *inode, struct file *file,
struct ceph_dir_file_info *dfi =
kmem_cache_zalloc(ceph_dir_file_cachep, GFP_KERNEL);
if (!dfi) {
ceph_put_fmode(ci, fmode); /* clean up */
ceph_put_fmode(ci, fmode, 1); /* clean up */
return -ENOMEM;
}
@ -224,7 +224,7 @@ static int ceph_init_file_info(struct inode *inode, struct file *file,
} else {
fi = kmem_cache_zalloc(ceph_file_cachep, GFP_KERNEL);
if (!fi) {
ceph_put_fmode(ci, fmode); /* clean up */
ceph_put_fmode(ci, fmode, 1); /* clean up */
return -ENOMEM;
}
@ -263,7 +263,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
case S_IFLNK:
dout("init_file %p %p 0%o (symlink)\n", inode, file,
inode->i_mode);
ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
ceph_put_fmode(ceph_inode(inode), fmode, 1); /* clean up */
break;
default:
@ -273,7 +273,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
* we need to drop the open ref now, since we don't
* have .release set to ceph_release.
*/
ceph_put_fmode(ceph_inode(inode), fmode); /* clean up */
ceph_put_fmode(ceph_inode(inode), fmode, 1); /* clean up */
BUG_ON(inode->i_fop->release == ceph_release);
/* call the proper open fop */
@ -285,14 +285,15 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
/*
* try renew caps after session gets killed.
*/
int ceph_renew_caps(struct inode *inode)
int ceph_renew_caps(struct inode *inode, int fmode)
{
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_mds_request *req;
int err, flags, wanted;
spin_lock(&ci->i_ceph_lock);
__ceph_touch_fmode(ci, mdsc, fmode);
wanted = __ceph_caps_file_wanted(ci);
if (__ceph_is_any_real_caps(ci) &&
(!(wanted & CEPH_CAP_ANY_WR) || ci->i_auth_cap)) {
@ -405,6 +406,7 @@ int ceph_open(struct inode *inode, struct file *file)
} else if (ceph_snap(inode) != CEPH_NOSNAP &&
(ci->i_snap_caps & wanted) == wanted) {
__ceph_get_fmode(ci, fmode);
__ceph_touch_fmode(ci, mdsc, fmode);
spin_unlock(&ci->i_ceph_lock);
return ceph_init_file(inode, file, fmode);
}
@ -781,7 +783,7 @@ int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
}
out_req:
if (!req->r_err && req->r_target_inode)
ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode);
ceph_put_fmode(ceph_inode(req->r_target_inode), req->r_fmode, 1);
ceph_mdsc_put_request(req);
out_ctx:
ceph_release_acl_sec_ctx(&as_ctx);
@ -798,7 +800,7 @@ int ceph_release(struct inode *inode, struct file *file)
dout("release inode %p dir file %p\n", inode, file);
WARN_ON(!list_empty(&dfi->file_info.rw_contexts));
ceph_put_fmode(ci, dfi->file_info.fmode);
ceph_put_fmode(ci, dfi->file_info.fmode, 1);
if (dfi->last_readdir)
ceph_mdsc_put_request(dfi->last_readdir);
@ -810,7 +812,8 @@ int ceph_release(struct inode *inode, struct file *file)
dout("release inode %p regular file %p\n", inode, file);
WARN_ON(!list_empty(&fi->rw_contexts));
ceph_put_fmode(ci, fi->fmode);
ceph_put_fmode(ci, fi->fmode, 1);
kmem_cache_free(ceph_file_cachep, fi);
}

10
fs/ceph/inode.c
View File

@ -479,6 +479,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
ci->i_head_snapc = NULL;
ci->i_snap_caps = 0;
ci->i_last_rd = ci->i_last_wr = jiffies - 3600 * HZ;
for (i = 0; i < CEPH_FILE_MODE_BITS; i++)
ci->i_nr_by_mode[i] = 0;
@ -639,7 +640,7 @@ int ceph_fill_file_size(struct inode *inode, int issued,
if ((issued & (CEPH_CAP_FILE_CACHE|
CEPH_CAP_FILE_BUFFER)) ||
mapping_mapped(inode->i_mapping) ||
__ceph_caps_file_wanted(ci)) {
__ceph_is_file_opened(ci)) {
ci->i_truncate_pending++;
queue_trunc = 1;
}
@ -1013,6 +1014,13 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
fill_inline = true;
}
if (cap_fmode >= 0) {
if (!info_caps)
pr_warn("mds issued no caps on %llx.%llx\n",
ceph_vinop(inode));
__ceph_touch_fmode(ci, mdsc, cap_fmode);
}
spin_unlock(&ci->i_ceph_lock);
if (fill_inline)

2
fs/ceph/ioctl.c
View File

@ -243,11 +243,13 @@ static long ceph_ioctl_lazyio(struct file *file)
struct ceph_file_info *fi = file->private_data;
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
if ((fi->fmode & CEPH_FILE_MODE_LAZY) == 0) {
spin_lock(&ci->i_ceph_lock);
fi->fmode |= CEPH_FILE_MODE_LAZY;
ci->i_nr_by_mode[ffs(CEPH_FILE_MODE_LAZY)]++;
__ceph_touch_fmode(ci, mdsc, fi->fmode);
spin_unlock(&ci->i_ceph_lock);
dout("ioctl_layzio: file %p marked lazy\n", file);

11
fs/ceph/mds_client.c
View File

@ -2486,7 +2486,8 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
if (req->r_inode_drop)
releases += ceph_encode_inode_release(&p,
req->r_inode ? req->r_inode : d_inode(req->r_dentry),
mds, req->r_inode_drop, req->r_inode_unless, 0);
mds, req->r_inode_drop, req->r_inode_unless,
req->r_op == CEPH_MDS_OP_READDIR);
if (req->r_dentry_drop)
releases += ceph_encode_dentry_release(&p, req->r_dentry,
req->r_parent, mds, req->r_dentry_drop,
@ -2833,7 +2834,13 @@ int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, struct inode *dir,
if (req->r_inode)
ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN);
if (req->r_parent) {
ceph_get_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN);
struct ceph_inode_info *ci = ceph_inode(req->r_parent);
int fmode = (req->r_op & CEPH_MDS_OP_WRITE) ?
CEPH_FILE_MODE_WR : CEPH_FILE_MODE_RD;
spin_lock(&ci->i_ceph_lock);
ceph_take_cap_refs(ci, CEPH_CAP_PIN, false);
__ceph_touch_fmode(ci, mdsc, fmode);
spin_unlock(&ci->i_ceph_lock);
ihold(req->r_parent);
}
if (req->r_old_dentry_dir)

13
fs/ceph/super.h
View File

@ -366,6 +366,8 @@ struct ceph_inode_info {
dirty|flushing caps */
unsigned i_snap_caps; /* cap bits for snapped files */
unsigned long i_last_rd;
unsigned long i_last_wr;
int i_nr_by_mode[CEPH_FILE_MODE_BITS]; /* open file counts */
struct mutex i_truncate_mutex;
@ -680,6 +682,10 @@ extern int __ceph_caps_revoking_other(struct ceph_inode_info *ci,
extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask);
extern int __ceph_caps_used(struct ceph_inode_info *ci);
static inline bool __ceph_is_file_opened(struct ceph_inode_info *ci)
{
return ci->i_nr_by_mode[0];
}
extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci);
extern int __ceph_caps_wanted(struct ceph_inode_info *ci);
@ -1093,7 +1099,10 @@ extern int ceph_try_get_caps(struct inode *inode,
/* for counting open files by mode */
extern void __ceph_get_fmode(struct ceph_inode_info *ci, int mode);
extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode);
extern void ceph_get_fmode(struct ceph_inode_info *ci, int mode, int count);
extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode, int count);
extern void __ceph_touch_fmode(struct ceph_inode_info *ci,
struct ceph_mds_client *mdsc, int fmode);
/* addr.c */
extern const struct address_space_operations ceph_aops;
@ -1105,7 +1114,7 @@ extern void ceph_pool_perm_destroy(struct ceph_mds_client* mdsc);
/* file.c */
extern const struct file_operations ceph_file_fops;
extern int ceph_renew_caps(struct inode *inode);
extern int ceph_renew_caps(struct inode *inode, int fmode);
extern int ceph_open(struct inode *inode, struct file *file);
extern int ceph_atomic_open(struct inode *dir, struct dentry *dentry,
struct file *file, unsigned flags, umode_t mode);

1
include/linux/ceph/ceph_fs.h
View File

@ -568,6 +568,7 @@ struct ceph_filelock {
#define CEPH_FILE_MODE_RDWR 3 /* RD | WR */
#define CEPH_FILE_MODE_LAZY 4 /* lazy io */
#define CEPH_FILE_MODE_BITS 4
#define CEPH_FILE_MODE_MASK ((1 << CEPH_FILE_MODE_BITS) - 1)
int ceph_flags_to_mode(int flags);